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WO2016019917A1 - Ensemble de raccordement à fixation du type à contraction et expansion et structure de raccordement à fixation du type à contraction et expansion et procédé de raccordement - Google Patents

Ensemble de raccordement à fixation du type à contraction et expansion et structure de raccordement à fixation du type à contraction et expansion et procédé de raccordement Download PDF

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Publication number
WO2016019917A1
WO2016019917A1 PCT/CN2015/086417 CN2015086417W WO2016019917A1 WO 2016019917 A1 WO2016019917 A1 WO 2016019917A1 CN 2015086417 W CN2015086417 W CN 2015086417W WO 2016019917 A1 WO2016019917 A1 WO 2016019917A1
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Prior art keywords
sleeve
expansion
shrink
hole
core rod
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PCT/CN2015/086417
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English (en)
Chinese (zh)
Inventor
杨东佐
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Individual
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Individual
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Publication of WO2016019917A1 publication Critical patent/WO2016019917A1/fr
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve

Definitions

  • the invention relates to a shrink-expandable fastening connection assembly, a shrink-expandable fastening connection structure and a connection method, which can replace two or more objects mechanically and statically, instead of a screw connection and an expansion screw connection, and particularly relates to a method High requirements for the removal of mechanical static joint aircraft, ships, equipment, aerospace equipment, aircraft carriers, spacecraft, rockets, engines, nuclear reactors, trains, high-speed rail, railroad tracks, steel structures, steel bridges, automobiles, etc.
  • the existing detachable mechanical static joints are generally threaded connections, keyed connections, pinned connections, expanded screw connections, etc., the most widely used being threaded connections.
  • the threaded connections need to be tightened.
  • the connection force between the threaded nut and the bolt is mainly manifested by the static friction generated by the pre-tightening force when tightening the thread and the bolt. Therefore, for the threaded connection of key objects, the preload force must be controlled to ensure the reliability of the work.
  • the second is the failure of the threaded connection caused by common fatigue damage.
  • the threaded connection is subjected to an alternating load and the pre-tightening force in the connection causes the connection to be loose.
  • the cyclic alternating load acts on the bolts that are only connected, the bolts are fatigue cracked or even broken due to the large alternating stress. Fatigue failure usually occurs in areas where stress concentration is severe, such as: screw head, thread closing end, thread at the screw support plane, and transition corners of the screw.
  • the third is the creep that causes the threaded connection to fail at high temperatures.
  • Creep refers to the slow plastic deformation of a metal material over a long period of time under constant temperature and constant stress. Creep can occur at stresses that are less than the yield limit of the material. At low temperatures, the creep is not obvious, and only when a certain temperature (about 3/10 of the melting temperature of the material) is reached becomes significant. Creep can cause failure of the threaded connection at high temperatures. In order to eliminate creep, compensation measures are taken when the connection is assembled at room temperature, such as increasing the preload, or pre-tightening the bolts.
  • fretting wear causes failure of the threaded connection. Fretting wear is caused by a surface that is subjected to heavy loads and with little relative motion on the other surface. Threaded connections that carry vibration are most susceptible to fretting wear.
  • the existing anti-loosening of the threaded connection is to prevent loosening by using additional static friction force, such as adding a spring washer, or using the top effect of the two nuts in the case of low speed heavy load, that is, the top nut is loosened, or in the nut.
  • additional static friction force such as adding a spring washer
  • top effect of the two nuts in the case of low speed heavy load, that is, the top nut is loosened, or in the nut.
  • third is the most important anti-loose method, which is to improve the tensile strength of bolts and nuts, from 4.9, 8.8, 10.9, Levels 12.9 and 14.9 have been continuously improved.
  • connection between the objects relies on static friction, which cannot fundamentally solve the failure of the above-mentioned threaded connections, such as screw breaking, broken ends, thread crushing and shearing. , after the wear of the slider, etc.
  • the existing expansion screw is composed of a screw and an expansion tube, and the tail of the screw is conical, and the outer diameter of the cone is larger than the inner diameter of the expansion tube.
  • the screw cone moves toward the expansion tube, and the conical portion is moved by the axial movement of the thread, thereby forming a large positive pressure on the outer circumferential surface of the expansion tube to deform the expansion tube, and the deformation portion and the connecting object are inflated. Therefore, friction is self-locked between the connected objects, thereby achieving a fixing effect.
  • the fixing of the expansion thread connection is to use the wedge-shaped inclination to promote the expansion to generate static friction, and achieve the fixing effect.
  • a multifunctional expansion bolt for fastening members or as a built-in nut is disclosed, which is composed of an expansion plug body, an expansion core rod and a punching rod; the upper part of the expansion plug body There is a cap; the end of the expansion plug has a cross-shaped slit; the center of the expansion plug has a cylindrical threaded core hole, and the punch rod is threaded or unthreaded.
  • the expansion fastening connection structure comprises a light blind hole on the connection portion of the female body, an optical through hole on the attachment portion of the attachment body, and the optical expansion hole of the expansion plug body extending through the optical through hole on the attachment portion of the attachment body to the connection portion of the female body
  • the connection method of the expansion fastening structure comprises: when the punching rod is struck along the core hole, pushing the expansion core rod into the wall, the tail end is expanded, and the fastening function can be used; or the embedded nut can be embedded as a built-in nut In the wall, screwing into different shapes of the screw can be used for different mounting and fixing functions.
  • the disassembly method of the expansion fastening structure includes: if the multi-purpose expansion bolt needs to be removed, only the expansion core rod is punched over the tail end of the expansion plug body, and then the expansion plug body is pulled out by the pull pin, and when disassembled, Simply drill the cap with a drill.
  • the expansion bolt of this structure is embedded in the mother body by the deformation of the tail end of the expanded expansion plug.
  • the expansion screw, expansion fastening structure and connection method of the patent mainly have the following disadvantages: First, the hardness of the material of the matrix is much lower than the hardness of the material of the expansion plug, and the tail end of the expansion plug can be embedded. In the mother body, the scope of use is limited. It is suitable for the fastening installation of the brick, tile, cement, wood structure and other inconvenient tapping components or the use of the insert nut. It is not suitable for the connection of mechanical parts, especially metal mechanical parts.
  • the plug body, the mother body and the appendage body are connected together to achieve the purpose of preventing loosening; since the inner diameter of the wall hole pre-drilled in the mother body is usually matched with the diameter of the expansion plug body, the amplitude of the expansion end of the expansion plug body can be expanded.
  • the amount is small, and the static friction force generated by the radial pressing force with the inner wall of the wall hole of the mother body exists only in the tail end section of the expansion plug body; when the load is large or used for vibration, the expansion plug body and the mother body A small amount of sliding friction occurs between the walls of the hole. As the time increases, the amount of sliding increases, and there is a possibility that a safety accident may occur due to the loosening of the expansion bolt, or the expansion plug is subjected to a large axial direction.
  • the tail end of the expansion plug When the load is applied, the tail end of the expansion plug will be deformed under the force of the mother body, so that the static friction force between the tail end of the expansion plug body and the mother body and the resisting force after the deformation of the expansion plug body are greatly reduced, so the expansion plug body is subjected to Under the action of a large axial force, the static friction between the tail end of the expansion plug and the mother body and the resisting force after the deformation of the tail end of the expansion plug body are pulled out, and the expansion plug body is pulled out from the mother body, resulting in easy failure;
  • the expansion bolt of this structure is not suitable for occasions with large load or large vibration. It is not suitable for the case where the expansion bolt installed under the parent body is subjected to a large axial load, and it is not recommended.
  • the expansion bolt is used to fasten the ceiling fan and the like; the third is that although the expansion bolt is detachable, the expansion core rod needs to be rushed over the tail end of the expansion plug body, and then the expansion plug body is pulled out by the pin puller.
  • the disassembly is troublesome, on the other hand, the expansion bolt is completely destroyed after disassembly, and can not be reused, especially because the end of the expansion plug is deformed by the expansion more than the parent body. Holes, which can seriously damage the mother when disassembled.
  • Patent No. 201220208899.2 discloses an expansion screw comprising a screw (1), a wedge nut (2) and a decorative sleeve (6).
  • the screw (1) is provided with a wedge sleeve (5) and a wedge nut.
  • the wedge sleeve (5) and the wedge nut (2) are provided with two half jackets (3) opposite to each other, and a spring (4) is wound between the two half jackets (3).
  • the structure of the expansion fastening structure, the two half-shells are completely installed in the mother body, through the tapered portion of the wedge sleeve through the attachment body, and then through the screw sleeve through the tapered sleeve and the wedge nut fixed to connect the attachment body to the parent body Together.
  • the connecting method and the disassembling method of the expansion fastening structure include the following steps: drilling a hole as large as a cylindrical outer casing on a wall or a ground, inserting the expansion screw into the prefabricated hole, because the triangular wedge on the wedge nut is two and a half
  • the jacket is tightened, when the screw is tightened, the wedge nut is close to the wedge sleeve, and the two half sleeves are opened and the prefabricated hole is expanded to achieve the purpose of fastening; when the screw is loosened, the wedge nut is away from the wedge sleeve, and the two half jackets are
  • the expansion screw can be removed by shrinking together under the action of the spring.
  • the expansion screw, expansion fastening structure and connection method of the patent although the expansion screw and the mother body are not damaged during disassembly, still have the following disadvantages: First, the connection force between the two half jackets and the mother body is still inflated. The static friction force, the connection force between the attached body and the mother body is the pre-tightening static friction force between the screw and the wedge nut, so the force in the axial direction is small, and the shortcomings of the screw connection are manifested at any time; The half jacket is not axially positionable in the mother body.
  • Patent No. 201210245807.2 discloses a method for opening a wall hole fixing object on a building and an expansion bolt and a special cooker used in the method.
  • the method mainly comprises the following steps: drilling a blind according to a conventional method Hole; use a special cookware to pry the reaming hole with a diameter larger than the diameter of the blind hole at the bottom of the blind hole and form a stepped surface; the expansion bolt is inserted into the blind hole; the fixed object is installed; after the washer is put on, the nut is tightened with a wrench.
  • the tail of the screw gradually presses the flap of the tail of the expansion sleeve to gradually bend outward, and finally forms a flange which is hooked to the step surface.
  • the invention patent although the sliding static friction force generated by the radial pressing force between the flap of the expansion sleeve and the concrete is changed into the axial resistance of the valve to the concrete, by thickening the thickness of the flap, further
  • the method of improving the anti-dropping performance of the expansion bolt and preventing the object from falling, the method for opening the wall hole fixing object on the building and the expansion bolt and the special cooking utensil used in the method have the following disadvantages: First, the expansion sleeve tail portion The flap is formed by the deformation and the reaming, and cannot be precisely matched with the reaming.
  • the flap of the tail of the expansion sleeve is in line contact with the reaming, and the position of the flap at the end of the expansion sleeve and the reaming line are generated.
  • a large stress concentration causes the breakage at this point, and the expansion sleeve cannot be made into a high strength and is easily broken due to the need for deformation, and therefore the sliding static friction force generated by the radial pressing force between the flap of the expansion sleeve tail and the concrete It becomes the axial resistance of the valve to the concrete, but the fixing is still very unreliable;
  • the second is to ream the hole in the building, the building is made of concrete material, and the tail of the expansion sleeve
  • the large stress generated by the line contact position of the flap causes the concrete to fall off, and a large axial gap is easily generated between the parent body, the attached body and the expansion bolt, which seriously affects the fixing effect; the third is between the attached body and the parent body.
  • Patent No. 201120031423.1 discloses a rapid expansion anchor bolt, and a plurality of outer sleeve anti-skid projections are arranged on the outer sleeve tensioning blade, and the anti-slip projection only acts to increase static friction, and there is no
  • the function of the resistance is also a threaded connection with all the disadvantages of the threaded connection.
  • the technical problem to be solved by the present invention is to overcome the detachable mechanical static connection using screws and the detachable mechanical static connection using expansion screws or expansion bolts existing in the screw connection technology widely used in the world, and rely on static friction to connect objects.
  • the mechanical static connection together, or the use of expansion screws or expansion bolts relies on the deformation of the shrink sleeve to resist the connection of the objects together, in the case of large loads, especially large axial loads or large vibrations or high temperatures, etc.
  • the shrink sleeve has no axial movement during the shrinking process, and the parent member and the attached member are connected together by the resisting force, even in a special load Especially in the harsh occasions where the axial load is particularly large, or the vibration is particularly large, or the high temperature or high temperature cross-changes, the connection does not fail, the connection is very reliable, the shrink-expanding fastening connection assembly, the shrink-expanding fastening structure And connection method.
  • the shrink-expandable fastening joint assembly of the invention comprises a connecting core rod and two or more expansion members; the expansion member is combined to form an expansion sleeve;
  • the utility model further comprises a shrink sleeve composed of two or more shrinking members and a connecting core rod, a sleeve for driving the shrink sleeve to shrink, and a limit mechanism for preventing the sleeve from loosening when the shrink sleeve is fully contracted;
  • An expansion driving cone surface for driving expansion sleeve expansion is disposed on the connecting core rod, and an abutting head portion axially resisted by the expansion sleeve is disposed on an outer circumferential surface of one end portion of the connecting core rod, and the other end of the connecting core rod is further a shrinking member abutting portion for axially resisting the shrink sleeve; the driving driving taper surface is disposed between the resisting head portion and the shrinking member resisting portion;
  • Each of the expansion members includes an expansion member body that cooperates with a hole in the female member, and a first abutment projection that radially protrudes from the expansion member body and engages with the first abutment recess on the hole wall of the hole in the female member a taper surface for expansion that cooperates with the driving taper surface for expansion;
  • a shrink sleeve receiving space is provided in the sleeve, and a shrinking driving taper surface matching the shrinking tapered surface of each flap shrinking member is provided on the wall of the shrink sleeve receiving space.
  • the first abutting protrusion is an annular first wedge-shaped abutting groove disposed on the hole wall of the hole of the parent member; the first abutting protrusion is disposed on the outer circumference of the expansion member, and the first The wedge-shaped abutting groove engages the wedge-shaped abutting portion.
  • the single first wedge-shaped abutting portion includes a guiding portion, a resisting portion connected to the guiding portion, a connecting portion connecting the abutting portion and the expansion member body, the resisting portion is perpendicular to the axis of the expansion member;
  • the single first wedge-shaped resisting groove includes Two guiding surfaces connected to the hole wall of the hole in the parent member, two vertical faces connected to the two guiding faces and perpendicular to the axis of the hole in the parent member, connecting the connecting faces of the two vertical faces; the expansion sleeve is completely In the expanded state, the guiding section is matched with the clearance surface of the escaping, the resisting section is resisted by the vertical surface, and the connecting section is matched with the two guiding surfaces.
  • the first wedge-shaped abutting portion and the first wedge-shaped abutting groove of the structure are connected to the receiving force completely in the axial direction, and the surface-to-surface resisting effect is better.
  • the expansion member body can be tightly matched with the hole wall of the hole in the female member to generate static friction force, so that the connection force between the expansion sleeve and the female member includes not only the resisting force but also the static friction force, and reduces the receiving force on the first wedge-shaped resisting portion. Force, better connection
  • the shape of the single first wedge-shaped abutting portion on the cross section passing through the axis is a pointed shape or a trapezoidal shape or an arc shape; the shape of the first wedge-shaped resisting groove on the cross section passing through the axis is matched with the first wedge-shaped resisting portion.
  • the first wedge-shaped abutting portion and the first wedge-shaped abutting groove are in contact with the two inclined surfaces of the oblique-shaped two inclined surface contacts or the trapezoidal shape, or are in contact with each other through the curved surface.
  • first wedge-shaped abutting portion and a first wedge-shaped abutting groove or a trapezoidal first wedge-shaped abutting portion and a first wedge-shaped abutting groove, or a curved first wedge-shaped abutting portion and a first wedge-shaped abutting groove, the female member
  • the axial assembly of the attached member and the expansion sleeve has no gap at all, which reduces the machining accuracy.
  • an axial positioning mechanism for axially positioning the expansion sleeve is also included.
  • the axial positioning structure is a positioning portion disposed on the outer circumference of the expansion member, and the female member is further provided with a receiving hole concentrically accommodating the positioning portion with the hole on the female member.
  • the outer peripheral surface of the expansion member body is a cylindrical curved surface, and the outer peripheral surface of one end portion of the expansion member body is radially convexly formed to form a positioning portion, and is radially convex along the outer peripheral surface of the other end portion of the expansion member body.
  • a first abutting protrusion is formed; a ring groove is formed in the hole wall of the hole in the female member to cooperate with the first abutting protrusion.
  • the hole in the parent member is a blind hole;
  • the axial positioning mechanism includes a positioning spring disposed between the bottom of the hole provided on the female member and the expansion sleeve; and the initial state of the spring is positioned in the free state of the positioning spring a state in which the first wedge-shaped resisting portion on the expansion sleeve faces the corresponding first wedge-shaped resisting groove on the female member, and the second first wedge-shaped resisting portion on the expansion sleeve and the corresponding second first wedge-shaped resisting groove on the attachment member Right.
  • the first wedge-shaped abutment portion of the expansion sleeve can smoothly enter the first wedge-shaped abutment groove during the expansion process.
  • the hole in the parent member is a stepped hole
  • the large hole near the attached member is a sleeve for mounting the expansion sleeve
  • the distance from the attached member is a small driving core rod in the expansion process of the expansion sleeve to avoid driving the core rod.
  • the depth of the hole and the small hole is greater than the distance of the driving core rod in the axial movement of the expansion sleeve, and the axial positioning mechanism is the step surface of the stepped hole.
  • the depth of the small hole is larger than the distance of the driving core rod in the axial movement of the expansion sleeve, and the driving core rod has sufficient movement space; in the unexpanded state of the expansion sleeve, the outer diameter of the expansion sleeve is larger than the small hole of the stepped hole. The diameter allows the expansion sleeve to be resisted by the stepped surface in the unexpanded state.
  • the expansion sleeve has no axial movement during the expansion process, and only expands in the radial direction, so that the first wedge-shaped abutting portion can smoothly enter the first wedge-shaped abutment groove.
  • the hole in the parent member is a blind hole; the axial positioning mechanism is the bottom surface of the blind hole; and the driving core rod is also provided in the expansion sleeve to avoid the empty driving space of the driving core rod during the expansion process of the expansion sleeve
  • the depth of the space to be avoided is greater than the distance of the driving core rod during the expansion of the expansion sleeve; the end surface of the expansion sleeve abuts against the bottom surface of the blind hole, and the first wedge-shaped resisting portion on the expansion sleeve corresponds to the parent member
  • the first wedge-shaped abutment groove is directly opposite, and the second first wedge-shaped abutting portion on the expansion sleeve is opposite to the corresponding second first wedge-shaped resisting groove on the attachment member.
  • the end face of the expansion sleeve back is positioned on the bottom surface of the blind hole, and the expansion sleeve has no axial direction movement during the expansion process, and only expands in the radial direction, and the space avoidance provides a movement space during the movement of the driving core rod, so that A wedge-shaped abutting portion can smoothly enter the first wedge-shaped abutting groove.
  • the shrinking member abutting portion is an annular abutting groove or a resisting recess portion which is disposed on the connecting core rod and axially resists the end surface of the positioning resisting portion of the shrinking member facing away from the connecting core rod; the annular resisting groove or the resisting concave portion
  • the axial length is greater than or equal to the axial length of the shrinking member and the mating portion thereof, and the annular abutting groove or the groove wall of the abutting recess away from the positioning abutting portion forms a resisting wall axially resisting the contracting member.
  • the shrinking member resisting portion is an annular annular resisting groove or a resisting concave portion disposed on the connecting core rod, and the second resisting concave portion is not required to be processed on the shrink sleeve, and the annular concave portion is directly formed by the diameter change of the different portions of the connecting core rod
  • the advantage is that on the one hand, the manufacturing cost of connecting the core rod and the shrinking member is greatly reduced, and on the other hand, the axial connecting force directly acts on The entire shrinking member, rather than acting first on the second abutting projection and the second abutting recess, is transmitted to the shrinking member, thereby greatly increasing the bearing capacity of the shrink-expandable fastening joint assembly.
  • the shrinking member resisting portion is a second resisting convex portion disposed on the outer circumference of the connecting core rod, and a second abutting concave portion matching the second abutting protruding portion is disposed on the inner side of the shrinking member body;
  • the two resisting recesses are disposed on the wall connecting the core rod accommodating spaces.
  • the second abutting protrusion is a second annular wedge-shaped abutting portion radially protruding on the outer circumference of the connecting core rod; the second abutting recess portion is disposed on the inner side of the shrinking member and the second The second wedge-shaped resisting groove is engaged by the two wedge-shaped resisting portions.
  • the single second wedge-shaped abutting portion includes a guiding portion, a resisting portion connected to the guiding portion, a connecting abutting portion and a connecting portion connecting the core rod body, the resisting portion is perpendicular to the axis of the connecting core rod;
  • a single second The wedge-shaped abutting groove comprises two guiding surfaces connected with the connecting core receiving space wall of the shrink sleeve, and is connected with the two guiding surfaces and the axis of the shrink sleeve The vertical two vertical faces are connected to the two vertical faces for avoiding the empty connection; in the fully contracted state of the shrink sleeve, the guide section is matched with the avoidance joint surface, the resisting section is resisted by the vertical surface, and the connecting section and the two guiding faces are matched with each other.
  • the shape of the single second wedge-shaped abutting portion on the cross section passing through the axis is a pointed shape or a trapezoidal shape or an arc shape;
  • the shape of the second wedge-shaped resisting groove on the cross section passing through the axis is the shape of the second wedge-shaped resisting portion
  • the mating is pointed or trapezoidal or curved;
  • the second wedge-shaped resisting portion and the second wedge-shaped resisting groove are in contact with the two inclined surfaces of the oblique-shaped two inclined surface contacts or the trapezoidal shape, or are contacted by the curved surface.
  • the second abutting protrusion is a single spherical shape, or a columnar shape or a block-shaped protrusion protruding from the outer circumference of the connecting core rod;
  • the second resisting concave portion is a spherical shape a second side of the abutting projection engaging the cylindrical side through hole, or a cylindrical side through hole that cooperates with the cylindrical second abutting projection, or a block-shaped first second abutting projection outer contour Fitted side through holes.
  • the second resisting recess is a side through hole, which is convenient to process and has low processing cost.
  • the connecting core rod of this structure can be cast and formed.
  • the connecting core rod further comprises a straight light rod portion connected to the big end of the driving cone surface, the axial length of the straight light rod portion is larger than the axial length of the driving cone surface; and the shrink sleeve is completely contracted, and the connecting rod is connected There is a set distance between the driving taper surface and the corresponding shrinking taper on the shrink sleeve in the axial direction.
  • the shrink-expandable fastening joint assembly is characterized in that it further comprises an inner spring, and an inner spring is disposed on the hole wall of the connecting core receiving space of the shrink sleeve and the connecting core rod.
  • the sleeve is installed in the sleeve before the shrink sleeve is not mounted on the connecting core rod, and the shrink sleeve is resisted in the sleeve by the elastic force of the inner spring radially outward, and the inner spring is completely accommodated in the inner spring Set in the slot.
  • the shrink sleeve and the sleeve are installed together at the factory before the shrink sleeve is yet mounted on the connecting mandrel, and will not be scattered during transportation.
  • the shrink sleeve and the sleeve that are installed together are equivalent to the nut, and the connecting core rod is equivalent to the screw.
  • the connecting rod is provided with one end of the second resisting protrusion passing through the connected component, and then the mounting is performed.
  • the shrink sleeves and sleeves are mounted on the connecting rods for easy installation.
  • the outer spring is further provided with an outer spring receiving groove radially on the outer peripheral surface of each of the contracting members, and the contracting members of the two or more flaps are held together by the outer spring to form a shrink sleeve, and the outer spring is completely accommodated. Placed in the outer spring receiving groove.
  • the outer spring is used to install the shrinking parts of two or more flaps to form a shrink sleeve so as not to be separated.
  • the shrink sleeve is assembled at the factory and does not spread during transportation, and is convenient, quick and simple to use.
  • the limiting mechanism is a thread locking mechanism, comprising a threaded portion axially disposed on the connecting core body, and a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space; the thread of the sleeve The hole cooperates with the threaded portion of the core rod to secure the sleeve to the connecting core rod, thereby locking the shrink sleeve in the sleeve and connecting the core rod in a fully retracted state of the shrink sleeve.
  • the outer peripheral surface of the sleeve provided with the threaded hole is generally hexagonal.
  • the threaded hole of the shrink sleeve cooperates with the threaded portion of the connecting mandrel, which is particularly convenient to install. It is only necessary to pass the connecting core rod through the connected component, and then install the shrink sleeve and the sleeve on the connecting core rod, rotate the sleeve, and sleeve
  • the cartridge drive shrink sleeve shrinks so that the crimped connection assembly can connect the connected components together.
  • the second abutting protrusion and the threaded portion are arranged on the connecting core rod, which can be completed in one clamping process, thereby reducing the cost; the threaded hole on the sleeve is also convenient to process, and the processing cost is also low.
  • the shrink sleeve housing space includes a driving taper surface and a column hole connected to the large end of the driving taper surface, and a resisting portion is radially protruded on the hole wall of the column hole of the shrink sleeve receiving space;
  • the shrink sleeve The utility model further comprises a cylinder surface which is connected with the large end of the shrinking conical surface and cooperates with the column hole of the shrink sleeve receiving space, and an abutting groove which cooperates with the resisting portion on the sleeve is provided on the outer circumference of the shrink sleeve.
  • the spring force of the inner spring applies a radial abutting force toward the sleeve to the sleeve, and the abutting portion applies an axial abutting force to the shrink sleeve, thereby making the shrink sleeve more securely mounted within the sleeve.
  • the resisting groove should be set relatively shallow, and the resisting portion can be inserted into the resisting groove a little bit.
  • the shrink sleeve housing space further includes a column hole connected to the small end of the driving taper, the shrink sleeve further comprising a cylinder surface matched with the column hole, and the end portion of the cylinder protruding sleeve is radially outward Convex with a limit that limits the shrink sleeve to the sleeve
  • the maximum outer diameter of the limiting portion is larger than the diameter of the cylindrical hole of the shrink sleeve receiving space
  • the shrinking cone facing the shrink sleeve the axial opposite directions of the two opposite directions are mounted together with the sleeve
  • the limiting mechanism comprises a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space, and is disposed on the shrink sleeve a
  • the shrink sleeve is mounted to the sleeve by the elastic force in the radial direction of the inner spring, the limiting portion and the contracting cone facing the axial direction of the shrink sleeve in two opposite directions, thereby mounting the shrink sleeve and the sleeve.
  • the parts are not separated, so that the shrink sleeve and the sleeve are assembled in the factory beforehand, and will not be scattered during transportation.
  • the shrink sleeve is placed on the connecting core rod, and the axial direction force is applied to the sleeve to make the shrink sleeve.
  • the threaded portion of the shrink sleeve is threadedly engaged with the threaded hole of the sleeve to fix the sleeve and the shrink sleeve together, so that the shrink sleeve is locked and fixed in the sleeve and connected in the fully contracted state of the shrink sleeve.
  • the core rod is also easy to install and easy to operate.
  • the utility model further comprises a round pipe;
  • the limiting mechanism is a thread locking mechanism, comprising a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space, and the threaded hole disposed on the outer circumferential surface of the circular pipe and the sleeve The threaded portion of the fitting; a single-lobed shrinking member is disposed on the side wall of the circular tube to accommodate the side hole.
  • a first contraction expansion projection for contracting and expanding the shrink sleeve is protruded on the outer circumference of the shrink sleeve, and the first contraction expansion projection includes a contraction taper for the first contraction expansion.
  • the shrink sleeve housing space includes a first contraction expansion accommodating groove that cooperates with the first contraction expansion projection, and the two groove walls of the first contraction expansion accommodating groove form a drive for contracting the shrink sleeve and engaging the contraction taper surface of the shrink sleeve.
  • the conical recessed portion for expansion and the tapered taper for expansion are provided, and when disassembled, the conical recessed portion for expansion on the shrink sleeve cooperates with the taper surface for expansion on the shrink sleeve to shrink the shrink sleeve and disassemble It is easy and more reliable, ensuring that the shrink sleeve will not be damaged during the disassembly process.
  • the sleeve includes a first sleeve and a second sleeve; a first shrink-expansion receiving groove that cooperates with the first contraction-expanding projection is formed on the first sleeve; and the limiting mechanism is a thread locking mechanism comprising a threaded portion disposed on an outer circumference of the first sleeve, a threaded hole provided on the second sleeve to engage with a threaded portion of the first sleeve; and an outer circumference of the shrink sleeve a second contraction expansion projection that is symmetrical about a central position of the contraction expansion projection, the shrink sleeve accommodation space further includes a second engagement portion and a second contraction expansion projection The second shrinkage expansion is used for the accommodating groove.
  • the limiting mechanism is a limiting member installed between the sleeve and the connecting core rod.
  • the limiting mechanism is a limiting member installed between the sleeve and the connecting core rod, and has a simple structure and low cost.
  • the limiting mechanism is a first circlip.
  • the locking mechanism is a thread locking mechanism; and a second retaining spring that prevents the thread locking mechanism from being reversed.
  • the second circlip spring is provided to prevent the reverse rotation of the thread locking mechanism, and the working sleeve completely ensures that the shrink sleeve is completely contracted, thereby completely ensuring that the connection of the contracted expansion fastening assembly is completely reliable in the working state, and the foolproof operation is achieved. .
  • an axial ridge or a recess is provided on the outer side of each of the contracting members, and the contracting taper is disposed on the rib or the recess of the contracting member; and the sleeve is provided with a contracting member for each flap.
  • the upper rib-fitted recess or the rib that cooperates with the recess on each of the flaps, the drive taper is disposed on the sleeve ridge or recess.
  • a rib with a tapered taper is provided on the shrinking member, and a recessed portion with a driving taper surface is provided on the sleeve, and the diameter of the through hole on the connected member and the hole diameter of the hole on the connected member are unchanged.
  • the ribs on the shrinking member the ribs are added, thereby greatly increasing the axial load that the shrink sleeve can bear; the ribs with the driving taper surface are provided on the sleeve, and the belt is provided on the shrinking member.
  • the shrinking concave portion of the tapered surface can greatly increase the thickness of the shrinking member when the diameter of the through hole of the connected member and the hole diameter of the hole on the connected member are constant, thereby greatly increasing the axis of the shrink sleeve. To the load.
  • a shrink-expandable fastening connection structure comprising a mother member, an attachment member, and a shrink-expandable fastening assembly; a hole is formed in the parent member, and is disposed on the hole wall of the hole of the parent member and is provided on the expansion sleeve a first resisting recess portion of the first resisting projection; a through hole is provided on the attachment member;
  • the expansion member is hug on the connecting core rod to form an expansion sleeve, and the abutting head portion of the connecting core rod is axially resisted by the expansion sleeve;
  • the connecting core rod is provided with one end of the resisting head and the expansion sleeve extending into the hole of the female member, the expansion sleeve Fully accommodating in the hole of the parent member; in the fully expanded state of the expansion sleeve, the first abutting protrusion on the expansion sleeve extends into the first abutting recess of the parent member to form a snap, and the expansion sleeve is fixed with the parent member, and is connected The core rod and the expansion sleeve are fixed together, and the head of the connecting core rod is The expansion sleeve is axially resisted;
  • the connecting core rod is provided with one end of the shrinking member resisting portion and passing through the through hole of the attached body member, and the shrinking member resisting portion of the connecting core rod protrudes from the attached body member; the shrink sleeve is mounted on the connecting core rod, and the sleeve is installed on the shrink sleeve In addition, when the mother member, the attached member, and the shrink sleeve are abutted together, the shrink sleeve and the shrink member resisting portion of the connecting core rod are opposite each other; in the fully contracted state of the shrink sleeve, the shrink sleeve is connected to the shrink member of the core rod to resist the shaft portion To resist, the limiting mechanism limits the sleeve and the sleeve is radially restrained by the shrink sleeve to maintain the shrink sleeve in a fully contracted state, and the shrink-expanding fastening assembly fixes the attachment member and the parent member together.
  • connection method of a shrink-expanded fastening structure comprising:
  • the shrink-expandable fastening joint assembly comprises a connecting core rod, an expansion sleeve, an expansion driving member, a shrink sleeve, a sleeve for driving the shrink sleeve to shrink, and the sleeve is loosened when the shrink sleeve is fully contracted Limiting mechanism; providing a parent member and an attached member that need to be coupled;
  • Providing a hole in the body member, and a first abutting recess portion corresponding to the first abutting protrusion on the expansion sleeve is disposed on the hole wall of the hole of the body member; a through hole is disposed on the body member;
  • An expansion driving cone surface for driving expansion sleeve expansion is disposed on the connecting core rod, and an abutting head portion axially resisted by the expansion sleeve is disposed on an outer circumferential surface of one end portion of the connecting core rod, and the other end of the connecting core rod is further a shrinking member abutting portion for axially resisting the shrink sleeve; the driving driving taper surface is disposed between the resisting head portion and the shrinking member resisting portion;
  • Each of the expansion members includes an expansion member body that cooperates with a hole in the female member, and a first abutment projection that radially protrudes from the expansion member body and engages with the first abutment recess on the hole wall of the hole in the female member a taper surface for expansion that cooperates with the driving taper surface for expansion;
  • a shrink sleeve receiving space is provided in the sleeve, and a shrinking driving taper surface matching the shrinking tapered surface of each flap shrinking member is provided on the wall of the shrink sleeve receiving space.
  • Connection methods include:
  • the expansion member is hug on the connecting core rod to form an expansion sleeve, and the resisting head portion of the connecting core rod is axially resisted by the expansion sleeve;
  • the connecting core rod is provided with one end of the resisting head and the expansion sleeve extending into the hole of the female member, and expanding The sleeve is completely received in the hole of the female member; in the fully expanded state of the expansion sleeve, the first abutting projection on the expansion sleeve extends into the first abutting recess of the female member to form a snap, and the expansion sleeve is fixed with the female member
  • the connecting core rod and the expansion sleeve are fixed together, and the head of the connecting core rod is axially resisted by the expansion sleeve;
  • the connecting core rod is provided with one end of the shrinking member resisting portion and passing through the through hole of the attached body member, and the shrinking member resisting portion of the connecting core rod protrudes from the attached body member;
  • the shrink sleeve is mounted on the connecting core rod, and the sleeve is installed outside the shrink sleeve.
  • the mother member, the attached member member and the shrink sleeve are abutted together, the shrink sleeve and the shrinking member resisting portion of the connecting core rod are opposite each other;
  • the sleeve drives the shrink sleeve to contract, and the radial movement of the shrink sleeve forms a snap with the shrinking portion resisting portion;
  • the shrink sleeve When the shrink sleeve is fully contracted, the shrink sleeve is axially resisted by the contracting portion of the connecting core rod, the limiting mechanism limits the sleeve, and the sleeve is radially restrained by the shrink sleeve to keep the shrink sleeve in a fully contracted state, shrinking
  • the expansion fastening assembly secures the attachment member and the parent member together.
  • the connecting portion connecting the core rod protrudes the connecting portion; mounting the shrink sleeve and the sleeve at the connecting portion of the connecting core rod, and applying the facing portion to the resisting head of the connecting core rod.
  • the force in the direction or the axial force acting on the connecting portion toward the direction of the head, the abutting head of the connecting mandrel is resisted by the connecting portion toward the surface of the abutting head, or the connecting portion is abutted against the surface of the head toward the connecting portion Resisting the limit; applying a force to the shrink sleeve in the direction of the connecting portion, the shrink sleeve is resisted by the connecting portion, and the shrink sleeve on the shrink sleeve is sleeved on the wedge-shaped resisting groove to face the corresponding connecting core rod on the connecting core rod, and The shrinking cone in the sleeve slides on the shrinking cone of the shrink sleeve,
  • connection force of the contraction expansion type fastening connection assembly and the connecting portion in the shrinkage expansion type fastening structure depends on the axial abutting force acting on the connecting portion and the connection of the connecting core rod by the abutting head of the connecting core rod.
  • the wedge-shaped abutting portion on the core rod acts on the shrink sleeve of the shrink sleeve to resist the axial abutting force of the wedge-shaped resisting groove, and the shrink sleeve acts on the axis resisting force of the connecting portion instead of relying on the pre-tightening static friction force of the threaded connection, or shrinking the screw or shrinking Bolt's expansion and static friction, the connection force is not Always big.
  • the static friction force generated by the radial pressing force has the advantage of being large or vibrating. In this case, the connection will not be broken due to slight sliding friction.
  • the invention completely breaks the static connection of the existing screw-connected screw or bolt mechanical static connection by the pre-tightening, the mechanical static connection of the expansion screw or the expansion bolt, the expansion static friction force caused by the contraction or the deformation caused by the deformation of the shrink sleeve Force to connect the inertial thinking of the object.
  • the wedge-shaped resisting portion and the corresponding shrink-wrapped wedge-shaped resisting groove on the connecting mandrel connecting the core rod are processed in advance, and are not formed by shrinkage deformation of the shrink sleeve.
  • the shrink sleeve is designed as two flaps (in which the shrink sleeve is the best for the three flaps).
  • the shrink sleeve does not deform during the shrinking process.
  • the first is that the number and shape of the wedge-shaped resisting portion on the connecting core rod can be determined according to the force.
  • Free design at the same time, the position of the shrink sleeve on the shrink sleeve is also designed according to the structure of the shrink sleeve and the thickness of the joint.
  • the second is shrinking.
  • the sleeve is not fully contracted, and the connecting portion connecting the core rods is sequentially passed through the connecting portion, and the resisting head portion of the connecting core rod and the shrinking sleeve are resisted by the opposite faces of the connecting portion, so that the connecting core rod on the shrink sleeve is wedge-shaped
  • the resisting portion and the corresponding shrink sleeve on the shrink sleeve are directly opposite to the wedge-shaped resisting groove, so that during the contraction of the shrink sleeve, the shrink sleeve moves in the radial direction, and the wedge-shaped resisting portion on the connecting core rod can enter the shrink sleeve on the shrink sleeve accurately and without fail.
  • the wedge-shaped resisting portion on the connecting core rod can be wedge-shaped on the shrink sleeve
  • the retaining groove is precisely matched, and the mating portions of the wedge-shaped abutting portion on the connecting core rod and the wedge-shaped resisting groove on the shrink sleeve are surface-fitted, thereby greatly reducing stress concentration; and the third is a material having a wide range of use and not requiring the parent member;
  • the hardness is much lower than the material hardness of the shrink-expanded fastening joint assembly, and there is no need for a large friction coefficient between the shrink-expanded fastening joint assembly and the parent member.
  • the abutting head of the connecting core rod is resisted by the connecting portion, and the shrink sleeve is contracted by the sleeve, so that the wedge-shaped resisting portion on the connecting core rod projects into the shrink sleeve of the shrink sleeve and the wedge-shaped resisting groove, due to the connecting core rod
  • the wedge-shaped resisting portion on the upper sleeve and the shrink-wrapped sleeve-shaped resisting groove on the shrink sleeve are independent of each other, and are not thread-shaped.
  • the shrink sleeve and the connecting core rod are not loosened (not reversed and loosened), and therefore are fastened by shrinkage expansion.
  • connection of the connecting component to the connected component is very reliable; the sleeve only serves to shrink the shrink sleeve, and does not bear the connection force connecting the joint.
  • the sleeve is fully contracted in the shrink sleeve and the force of the sleeve is very small, even if the sleeve is used.
  • Threaded connections are also almost impossible to cause failure of the threaded connection, so the connection of the sleeve to the shrink sleeve in the fully retracted state, or the connection of the sleeve to the connecting rod is also very reliable, and it is easy to achieve the never-falling of the connecting mandrel. It is fixed on the shrink sleeve so that the connection between the parent member and the attached member in the working state never falls off.
  • the connecting core rod is not embedded in the shrink sleeve.
  • the radial connection force between the shrink sleeve and the connecting core rod is very small, and the shrink sleeve on the shrink sleeve is sleeved with a wedge-shaped resist groove and connected.
  • the wedge-shaped resisting portion of the connecting rod of the core rod is also almost impossible to be damaged in the working state; therefore, when disassembling, the sleeve is only required to be disengaged from the retracted position, and the shrink-expandable fastening connection assembly and the connection can be connected without requiring a large force.
  • the core rod is separated, the shrinkage expansion type fastening joint component is not damaged when disassembled, and the joint portion is not damaged, and the shrinkage expansion type fastening joint assembly can be repeatedly used repeatedly, and the joint portion is not tightly contracted due to shrinkage.
  • the location of the connection of the solid connection assembly is damaged and needs to be reworked or scrapped.
  • the shrink-expandable fastening joint assembly can be designed as a standard part.
  • the connecting core rod is equivalent to a bolt.
  • the shrink sleeve and the sleeve are mounted together with respect to the nut, which is convenient to use and the cost can be greatly reduced.
  • the connecting mandrel is a one-piece solid rod that can withstand greater forces than a hollow expansion sleeve.
  • FIG. 1 is a perspective view showing a shrink-expandable fastening joint assembly with a second circlip according to a first embodiment of the present invention.
  • FIG. 2 is a perspective exploded view of a shrink-expandable fastening assembly with a second circlip according to Embodiment 1 of the present invention.
  • Fig. 3 is a front elevational view showing the contraction-expandable fastening structure of the first embodiment of the present invention in a state in which the expansion sleeve is not inflated and the shrink sleeve is not contracted.
  • Fig. 4 is a cross-sectional view showing the rotation of A-A of Fig. 1;
  • Fig. 5 is an enlarged schematic view showing a portion I of Fig. 4;
  • Fig. 6 is a front elevational view showing the contraction-expandable fastening structure of the first embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Fig. 7 is a cross-sectional view taken along line B-B of Fig. 6.
  • Fig. 8 is an enlarged schematic view showing a portion II of Fig. 7.
  • Figure 9 is an axial cross-sectional view showing the center position of one of the flap shrink members of the shrink-expandable fastening structure of the second embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Figure 10 is an axial cross-sectional view showing the center position of one of the flap shrink members of the shrink-expandable fastening structure of the third embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Figure 11 is a perspective exploded view of the shrink-expandable fastening assembly with a second circlip in the fourth embodiment of the present invention.
  • Figure 12 is an axial cross-sectional view showing the center position of one of the flap shrink members of the shrink-expandable fastening structure of the fourth embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Fig. 13 is an enlarged schematic view showing a portion II of Fig. 12;
  • Figure 14 is a perspective exploded view of the shrink-expandable fastening assembly of Embodiment 5 of the present invention.
  • Figure 15 is a cross-sectional view showing the center position of a shrinkage-receiving member of the fifth embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Fig. 16 is an enlarged schematic view showing a portion III of Fig. 15;
  • Figure 17 is a perspective exploded view of the shrink-expandable fastening assembly of Embodiment 6 of the present invention.
  • Figure 18 is a cross-sectional view showing the center position of one of the flap shrink members of the shrink-joined structure of the sixth embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Fig. 19 is an enlarged schematic view showing a portion IV of Fig. 18;
  • Figure 20 is a perspective exploded view of the shrink-expandable fastening assembly of Embodiment 7 of the present invention.
  • Figure 21 is a cross-sectional view showing the center position of one of the flap shrink members of the shrink-joined structure of the seventh embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Figure 22 is a perspective view of a circular tube.
  • Fig. 23 is an enlarged schematic view showing a portion IV of Fig. 21;
  • Figure 24 is a cross-sectional view showing the center position of one of the flap shrink members of the shrink-joined structure of the eighth embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • Fig. 25 is an enlarged schematic view showing a portion V of Fig. 24;
  • Figure 26 is a cross-sectional view showing the center position of one of the flap shrink members of the shrink-joined structure of the ninth embodiment of the present invention in a state in which the expansion sleeve is fully expanded and the shrink sleeve is fully contracted.
  • a shrink-expandable fastening joint assembly includes a connecting core rod 1, a three-lobed expansion member 2, and an expansion driving member 3, which are composed of a three-lobed contracting member 4 and a connecting core rod 1.
  • the connecting core rod 1 includes a resisting head portion 11 which is axially abutted by the expanding sleeve 7, a cone 12 whose big end is connected to the end surface of the resisting head 11, and a cylindrical straight line which is connected to the small end of the cone 12.
  • the screw 20 of the straight beam portion 18 is provided on the outer peripheral surface of the cone 12, the straight rod portion 13, and the driving cone 14 for expansion, and the plurality of inverted L-shaped portions are provided on the end surface of the screw 20.
  • the projection 22, the projection 22 and the end surface of the screw 20 form a second latching groove 23.
  • the outer diameter of the abutting head portion 11 is larger than the diameter of the large end of the cone 12 to form an abutting surface.
  • the expansion driving member 3 includes an expansion driving cone 24, a cylindrical straight rod portion 25 connected to the large end of the expansion driving cone 24, and a cone 26 whose small end is connected to the straight rod portion 25, and
  • the cylindrical abutting portion 27 of the cone 26 which is connected at the big end and radially protrudes the cone 26, the threaded through hole 28 provided at the axial center position, and the circular blind hole 29 which is evenly distributed in the axial direction on the end surface of the resisting portion 27 .
  • the drive tool projects into more than two circular blind holes 29 when the expansion sleeve 7 is inflated.
  • the expansion member 2 includes an expansion member body 32 having an outer peripheral surface that is engaged with the hole wall of the blind hole 31 on the parent member 30, and is radially protruded from the expansion member body 32.
  • the first wedge-shaped abutting portion 33 on the outer circumference is radially protruded from the outer periphery of one end of the expander body 32, the positioning portion 35 axially positioning the expansion sleeve 7, and the spring receiving portion provided on the outer peripheral surface of the expander body 32 Slot 36.
  • the outer diameter of the expansion member body 32 is equal to the diameter of the circular blind hole 31, and the maximum distance from the outer circumference of the positioning portion 35 to the axial center of the expansion member body 32 is greater than the maximum distance from the outer circumference of the first wedge-shaped resisting portion 33 to the axial center of the expansion member body 32.
  • the single first wedge-shaped abutting portion 33 includes a guiding portion 37 provided with two inclined faces formed by chamfers, and is connected with the guiding portion 37, and is provided with two vertical facing abutting portions 38, connecting the abutting portion 38 and the expansion member body 32, There are two beveled connecting sections 39 formed by chamfers, the abutting sections 38 being perpendicular to the axis of the expansion member 2.
  • the inner side surface of the expansion member 2 includes an expansion conical surface 69, a cylindrical curved surface 70 connected to the expansion conical surface 69, and an expansion conical surface 71 connected to the cylindrical curved surface 70.
  • the inner side wall of the shrink member 4 is a stepped cylindrical curved surface 40 and a cylindrical curved surface 41.
  • a second wedge-shaped resisting groove 42 that cooperates with the second wedge-shaped abutting portion 19 and an inner spring receiving groove 43 that cooperates with the inner spring 9 are provided on the cylindrical curved surface 41.
  • An inner spring receiving groove 44 is provided for engaging the inner spring 8.
  • the shape of the single second wedge-shaped abutment groove 42 on the cross section passing through the axis is a trapezoidal shape that cooperates with the second wedge-shaped resisting portion 19.
  • the outer side wall of the shrink member 4 includes a conical curved surface 45 for contracting the contraction sleeve 5, a cylindrical curved surface 46 connected to the large end of the conical curved surface 45, and a constricted conical joint with the small end and the cylindrical curved surface 46.
  • the curved surface 47 is a cylindrical curved surface 48 that is connected to the large end of the conical curved surface 47 for contraction.
  • the conical curved surface 45 for contraction and the conical curved surface 47 for contraction form a conical surface for contraction.
  • a resisting groove 49 is provided on the cylindrical curved surface 46 of the shrink sleeve 5.
  • the outer side wall of the sleeve 6 is a regular hexagon.
  • a sleeve receiving space 50 is provided in the sleeve 6, and a threaded through hole 51 communicating with the shrink sleeve housing space 50 is provided.
  • a plurality of radial anti-rotation grooves 52 are provided on the end face of the sleeve 6 facing away from the expansion sleeve 7.
  • the limiting mechanism is a thread locking mechanism, which is a screw 20 connecting the core rod 1 and a threaded through hole 51 in the sleeve 6 screwed to the screw 20.
  • the shrink sleeve housing space 50 includes a tapered hole 53 whose small end is connected with the threaded through hole 51, a receiving cylindrical hole 54 connected to the large end of the tapered hole 53, and a small end and a cylindrical hole.
  • 54 is connected to the contraction drive taper hole 55, the cylindrical hole 56 connected to the large end of the contraction drive taper hole 55, and the contraction drive taper hole 57 to which the small end is connected to the cylinder hole 56.
  • the contraction drive taper hole 55 and the contraction drive taper hole 57 form a contraction drive taper.
  • a resisting portion 58 is formed inwardly on the wall of the cylindrical hole 56, and the resisting portion 58 is engaged with the resisting groove 49.
  • the cylindrical curved surface 40 and the cylindrical curved surface 41 of the shrinking member 4 that are held together form a connecting core receiving space 59.
  • the three-lobed shrinking members 4 are all mounted in the sleeve 6, the resisting portion 58 is mounted in the resisting groove 49, the inner spring 8 is mounted in the inner spring receiving groove 44, and the inner spring 9 is mounted in the inner spring receiving groove 43.
  • the inner spring 8 is completely received in the inner spring receiving groove 44, and the inner spring 9 is completely accommodated in the inner spring receiving groove 43, and the inner spring 8 and the inner spring 9 are elastically outwardly biased. 4 resists inside the sleeve 6.
  • the shrinking member 4 and the sleeve 6 are not attached to the connecting mandrel 1, the shrinking member 4 and the sleeve 6 are not automatically separated, and the shrinking members 4 are held together to form the shrink sleeve 5.
  • the shrink sleeve 5 and the sleeve 6 thus mounted are equivalent to a nut, and the connecting core rod 1 is equivalent to a screw, which is as simple as mounting the screw and the nut in the field.
  • a shrink-expandable fastening structure includes a shrink-expandable fastening assembly, an attachment member 34, a female member 30, and a second retaining spring 60.
  • a circular through hole 61 that is engaged with the connecting core rod 1 is provided on the attachment member 34, and a first wedge-shaped resisting groove 62 that engages with the first wedge-shaped abutting portion 33 is provided on the wall of the circular blind hole 31 of the female member 30.
  • a counterbore 63 that communicates with the blind hole 31 is also provided on the parent member 30.
  • the single first wedge-shaped abutment groove 62 includes two guide ramps 64 that are connected to the wall of the blind hole 31 of the parent member 30, two of which are connected to the two guide ramps 64 and that are perpendicular to the axis of the blind hole 31 on the parent member 30.
  • the vertical surface 65 connects the two connecting slopes 66 for the two vertical surfaces 65.
  • the second circlip spring 60 includes a circlip main body 67 that is disconnected in the middle, and a block-shaped rotation preventing portion 68 that protrudes from a side of the circlip main body 67 away from the disconnected position.
  • the three-lobed expansion member 2 constitutes an expansion sleeve 7 for holding the drive core member, and a drive core housing accommodation space is provided in the expansion sleeve 7.
  • the threaded through hole 28 of the expansion drive member 3 is screwed onto the externally threaded portion of the screw 16 of the connecting core rod 1, and the expansion driving cone 24 of the expansion drive member 3 is used.
  • the axial distance between the small end and the small end of the expansion driving cone 14 of the connecting core rod 1 is slightly larger than the axial length of the cylindrical curved surface 70.
  • the three-lobed expansion member 2 is hug on the expansion driving member 3 and the connecting core rod 1.
  • the rotation preventing rib 21 of the connecting core rod 1 is installed in the joint gap of the adjacent two-lobed expansion member 2, and passes through the conical surface 71 for expansion.
  • the expansion expansion member 2 is engaged with the expansion driving cone 24, and the expansion driving member 3 and the expansion conical surface 69 are engaged with the expansion driving cone 14 to position the expansion member 2 and the connecting core rod 1.
  • the cylindrical curved surface 70 is hung on the screw 16.
  • the three-lobed expansion member 2 is not automatically separated from the expansion driving member 3 and the connecting core rod 1 by the spring 10, and the spring 10 is completely accommodated in the spring receiving groove 36. All of the cylindrical curved surfaces on the expansion sleeve 7 and the expansion conical surface are broken at the joint position of the adjacent two expansion members 2.
  • the expansion sleeve 7 is provided with one end of the first wedge-shaped abutting portion 33 projecting into the blind hole 31 in the parent member 30, and the expansion member body 32 is mounted on the parent member 30.
  • the positioning portion 35 of the expansion sleeve 7 radially protrudes from the circular blind hole 31 on the female member 30, and is axially resisted and positioned by the female member 30, and the first wedge-shaped resisting portion 33 and the corresponding first wedge shape
  • the resisting groove 62 is facing right.
  • the abutting portion 27 of the expansion driving member 3 abuts against the positioning portion 35 of the expansion sleeve 7, and the positioning portion 35 abuts against the bottom surface of the counterbore 63, the first wedge shape.
  • the abutting portion 33 extends into the corresponding first wedge-shaped abutment groove 62 to resist the engagement with the vertical surface 65 by the abutting portion 38 to form a snap, so that the expansion sleeve 7 and the parent member 30 are fixed together.
  • the guiding section 37 of the expansion sleeve 7 is in clearance engagement with the escaping connecting surface 66, and the connecting section 39 is in clearance fit with the two guiding surfaces 64.
  • the positioning portion 35 of the expansion sleeve 7 and the abutting portion 27 of the expansion drive member 3 are completely housed in the counterbore 63.
  • the outer circumferential surface of the positioning portion 35 on the expansion sleeve 7 is distributed on the same circumferential surface to form a separate annular shape which is broken at the joint position of the adjacent two-valve expansion member 2; the outer circumferential surface of the first wedge-shaped resisting portion 33 is distributed on the same circumferential surface.
  • an independent ring shape is formed which is broken at the joint position of the adjacent two-lobed expansion member 2.
  • the outer peripheral surface of the corresponding expansion member body 32 on the expansion sleeve 7 is distributed on the same circumferential surface, and is closely engaged with the surface of the hole of the circular blind hole 31 on the female member 30 by surface-to-surface contact.
  • the abutting surface of the abutting head 11 of the connecting core rod 1 is axially resisted by the end surface of the expansion sleeve 7.
  • the connecting core rod 1 is provided with one end of the second wedge-shaped abutting portion 19 passing through the attachment member 34, and the second wedge-shaped abutting portion 19 of the connecting core rod 1 protrudes from the attachment member 34.
  • the threaded through hole 51 of the sleeve 6 and the shrink sleeve 5 connected to the core rod accommodating space 59 are mounted on the connecting core rod 1 through the screw 20 of the connecting core rod 1
  • the threaded through hole 51 of the barrel 6 is screwed onto the screw 20 of the connecting core rod 1, and the abutting head portion 11 of the connecting core rod 1 is axially resisted by the expansion sleeve 7, and the shrink sleeve 5 is axially resisted by the attached body member 34 opposite thereto.
  • the female member 30 and the attached member 34 abut each other, and the second wedge-shaped abutting portion 19 of the connecting core rod 1 is opposite to the corresponding second wedge-shaped resisting groove 42 of the shrink
  • the second wedge-shaped resisting portion 19 of the connecting core rod 1 extends into the corresponding second wedge-shaped resisting groove 42 of the shrink sleeve 5 to form a contact by the two inclined surfaces of the trapezoid.
  • the threaded through hole 51 in the sleeve 6 is screwed on the screw 20 of the connecting core rod 1 to lock the sleeve 6 and the connecting core rod 1.
  • the sleeve 6 radially resists the limit of the shrink sleeve 5, passes through the second
  • the wedge-shaped abutting portion 19 extends into the second wedge-shaped abutting groove 42 to form a snap-to-radial limit of the connecting mandrel 1, and the shrink sleeve 5 is fixed to the connecting mandrel 1.
  • the abutting head 11 of the connecting core rod 1 is axially resisted by the expansion sleeve 7, the expansion sleeve 7 is axially resisted by the parent member 30, the shrink sleeve 5 is axially resisted by the attachment member 34, and the shrink-expanding fastening joint assembly will be the parent member 30 is attached and fixed to the attachment member 34.
  • the thread locking mechanism prevents the sleeve 6 and the shrink sleeve 5 from coming loose, keeping the shrink sleeve 5 in a fully retracted state.
  • the rotation preventing portion 68 of the second circlip spring 60 is mounted in the rotation preventing groove 52.
  • the circlip main body 67 is mounted in the second locking groove 23 and is abutted against the connecting core rod 1 through the second locking groove 23, and the circlip main body 67 shaft The sleeve 6 is resisted to prevent the sleeve 6 from being loosened in reverse.
  • the outer circumferential surfaces of the cylindrical curved surfaces 40 of the shrinking members 4 are distributed on the same circumferential surface, and the outer circumferential surfaces of the cylindrical curved surfaces 41 are distributed on the same circumferential surface.
  • the cylindrical curved surface 41 is concentric with the cylindrical curved surface 40, and the diameter of the cylindrical curved surface 41 is larger than the diameter of the cylindrical curved surface 40 and the diameter of the screw 16.
  • connection method for a shrink-expandable fastening connection comprising the following steps:
  • the threaded through hole 28 of the expansion drive member 3 is screwed onto the connecting mandrel 1 between the small end of the expansion drive cone 24 of the expansion drive member 3 to the small end of the expansion drive cone 14 of the connecting mandrel 1.
  • the axial distance is greater than the axial length of the cylindrical curved surface 70;
  • the three-lobed expansion member 2 is held on the expansion driving member 3 and the connecting core rod 1.
  • the rotation preventing rib 21 of the connecting core rod 1 extends into the joint gap of the adjacent two-valve expansion member 2, and passes through the expansion conical surface 71.
  • Cooperating on the expansion driving cone 24, the positioning expansion member 2 and the expansion driving member 3, the expansion conical surface 69 are hung on the expansion driving cone 14 to position the expansion member 2 and the connecting core rod 1;
  • the three-valve expansion member 2 and the expansion driving member 3 and the connecting core rod 1 are not automatically separated and held together by the spring 10 in the spring receiving groove 36 to complete the connection of the expansion fastening assembly;
  • the expansion sleeve 7 is provided with one end of the first wedge-shaped resisting portion 33 extending into the blind hole 31 in the parent member 30;
  • the force is applied to the expansion sleeve 7 in the axial direction of the attachment member 34, and the positioning portion 35 is axially resisted by the bottom surface of the counterbore 63 of the parent member 30, and the first wedge-shaped abutment portion 33 and the parent member 30 on the expansion sleeve 7 are positioned.
  • the corresponding first wedge-shaped resisting groove 62 is opposite;
  • the expansion driving member 3 is synchronously moved by the screwing engagement with the screw 20 of the connecting core rod 1, and the driving cone 24 for expansion by the expansion driving member 3 slides on the expansion conical surface 71 to connect the core rod 1
  • the expansion driving cone 14 slides on the expansion conical surface 69 to drive the expansion sleeve 7 to expand, and each of the expansion members 2 only moves radially, and the first wedge-shaped abutting portion 33 extends into the corresponding first wedge-shaped resisting groove of the parent member 30.
  • 62 is engaged with the vertical surface 65 by the abutting portion 38 to form a snap fit; the resisting portion 27 of the expansion driving member 3 abuts against the positioning portion 35, stopping the rotary expansion driving member 3, and driving the core member to stop driving;
  • the expansion sleeve 7 connects and fixes the attachment member 34 and the parent member 30 together;
  • the shrink sleeve 5 is mounted in the sleeve 6, the resisting portion 58 is mounted in the resisting groove 49, the inner spring 8 is mounted in the inner spring receiving groove 44, and the inner spring 9 is mounted in the inner spring receiving groove 43, The spring force of the inner spring 8 will be radially outward
  • the shrink sleeve 5 resists the sleeve 6; the above process is generally completed at the factory or at the installation site;
  • the screw 20 connecting the core rod 1 is sequentially passed through the circular blind hole 31 of the parent member 30, the circular through hole 61 of the attachment member 34, and the connecting core rod 1 is provided with a partial convex appendage member 34 of the second wedge-shaped resisting portion 19;
  • the threaded through hole 51 of the sleeve 6 and the connecting mandrel accommodating space 59 in the shrink sleeve 5 are mounted on the connecting mandrel 1 through the screw 20 of the connecting mandrel 1, and the threaded through hole of the sleeve 6 51 is screwed onto the screw 20 of the connecting mandrel 1, and the shrink sleeve 5 projects toward the side of the appendage member 34 to project the sleeve 6, the rotating sleeve 6, the sleeve 6 and the shrink sleeve 5 move synchronously toward the appendage member 34, Until the shrink sleeve 5 abuts against the attachment member 4, the sleeve 6, the shrink sleeve 5, the attachment member 34, and the parent member 30 abut each other, the second wedge-shaped resisting portion 19 and the shrink sleeve on the connecting core rod 1 5 corresponding to the second wedge-shaped resisting groove 42 is opposite;
  • the contraction of the sleeve 6 is slid by the driving conical hole 55 on the conical curved surface 45 of the shrink sleeve 5, and the contraction of the sleeve 6 is driven by the conical surface of the conical sleeve 5 in the constricted surface of the shrink sleeve 5
  • the sliding portion 47 is slid, the sleeve 6 drives the shrink sleeve 5 to contract, and each of the flap shrinking members 4 only moves radially, and the second wedge-shaped resisting portion 19 of the connecting core rod 1 projects into the corresponding second wedge-shaped resisting groove 42 of the shrink sleeve 5.
  • the shrink sleeve 5 is in a fully contracted state, and the sleeve 6 is further rotated.
  • the contraction of the sleeve 6 is driven by the small end of the drive taper hole 55 over the large end of the contraction conical surface 45 of the shrink sleeve 5, and the sleeve 6 is shrunk.
  • the small end of the driving tapered hole 57 passes over the large end of the conical curved surface 47 of the shrink sleeve 5, and the sleeve 6 continues to slide away from the shrink sleeve 5 by a distance to stop the rotating sleeve 6.
  • the sleeve 6 is screwed to the connecting mandrel 1 to lock the sleeve 6 to prevent the sleeve 6 and the shrink sleeve 5 from being loosened, so that the shrink sleeve 5 is maintained in a fully contracted state;
  • the second wedge-shaped abutting portion 19 of the connecting core rod 1 extends into the corresponding second wedge-shaped resisting groove 42 of the shrink sleeve 5, and is engaged by the two inclined surfaces of the trapezoid to form a snap through the sleeve 6.
  • the threaded through hole 51 is screwed on the screw 20 of the connecting core rod 1 to lock the sleeve 6 and the connecting core rod 1.
  • the sleeve 6 radially resists the shrink sleeve 5, so that the shrink sleeve 5 and the connecting core rod 1 are fixed together. ;
  • the abutting head 11 of the connecting core rod 1 is axially resisted by the expansion sleeve 7, the expansion sleeve 7 is axially resisted by the parent member 30, the shrink sleeve 5 is axially resisted by the attachment member 34, and the shrink-expanding fastening joint assembly will be the parent member 30, the attachment member 34 is fixedly coupled together with the expansion sleeve connecting the core rod 1 of the positioning resisting portion 13 axially resisting the parent member 30, the shrink-expandable fastening connection assembly connects the parent member 30 and the attachment member 34 together;
  • the rotation preventing portion 68 of the second circlip spring 60 is mounted in the rotation preventing groove 52.
  • the circlip main body 67 is installed in the second locking groove 23 and is resisted in the connecting core rod 1 through the second locking groove 23 to prevent the connecting core rod. 1 reverse.
  • the second circlip spring 60 is first removed from the second card slot 23, and then the sleeve 6 is reversely rotated.
  • the single first wedge-shaped abutting portion 91 on the expansion sleeve 90 has a trapezoidal shape in cross section through the axis; the single first wedge-shaped resisting groove 93 on the female member 92 passes by.
  • the shape on the cross section of the axis is a trapezoidal shape that cooperates with the first wedge-shaped resisting portion 91.
  • the first wedge-shaped abutting portion 91 and the first wedge-shaped abutment groove 93 are in contact with the two inclined faces of the trapezoid.
  • the shape of the single first wedge-shaped resisting portion 101 on the expansion sleeve 100 is triangular in cross section through the axis; the single first wedge-shaped resisting groove 103 on the female member 102 passes by.
  • the shape on the cross section of the axis is a triangle that mates with the first wedge-shaped resisting portion 101.
  • the first wedge-shaped abutting portion 101 and the first wedge-shaped abutment groove 103 are in contact by the two inclined faces of the triangle.
  • the expansion member 130 includes an expansion member body 131 whose outer peripheral surface has a cylindrical curved surface, and a projection portion radially extending along the outer peripheral surface of one end portion of the expansion member body 131.
  • a resisting projection 132 is disposed on the outer peripheral surface of the other end portion of the expander body 131 so as to be radially disposed, and the positioning portion 134 is axially positioned to the expansion sleeve 133.
  • the hole in the parent member 135 is a stepped blind hole, the small hole 136 of the step blind hole is close to the attachment member 137, and the large hole 138 of the stepped blind hole forms a first recessed portion.
  • a spring receiving groove 139 is disposed on an outer circumference of the first resisting convex portion 132; and a spring receiving groove 140 is disposed on an outer circumference of the positioning portion 134.
  • the outer circumferential surface of the positioning portion 134 of the expansion sleeve 133 is distributed on the same circumferential surface, and the outer circumferential surface of the first resisting convex portion 132 is distributed on the same circumferential surface, the first resisting convex portion 132 and the expansion member
  • the outer peripheral surface of the body 131 and the positioning portion 134 are concentric, the outer diameter of the positioning portion 134 is larger than the outer diameter of the first abutting convex portion 132, and the first resisting convex portion 132 and the positioning portion 134 are formed at the joint position of the adjacent two expansion members 130. Ring.
  • the connecting core rod 141 includes a cylindrical light rod portion 142, an expansion driving cone 143 whose large end is connected to the light rod portion 142, and a screw 145 provided with the external thread portion 144 connected to the small end of the expansion driving cone 143, the big end.
  • a cone 146 connected to the screw 145 and a cylindrical polished rod portion 147 connected to the small end of the cone 146 are protruded from the outer circumference of the polished rod portion 147.
  • Two independent annular second wedge-shaped resisting portions 148 are connected to the end surface of the optical rod portion 148 and radially protrude from the cylindrical optical rod portion 149 of the optical rod portion 148, and are disposed on the outer peripheral surface of the end portion of the optical rod portion 149.
  • a card slot 150 is provided in the expansion driving cone 143 and the rotation preventing rib 151 on the outer circumferential surface of the polished rod portion of the screw 145.
  • the rotation preventing rib 151 serves to prevent the connecting core rod 141 from rotating relative to the expansion member 130.
  • the expansion driving member 156 includes an expansion driving cone 152, a cylindrical light rod portion 153 connected to the large end of the expansion driving cone 152, and a threaded through hole 154 provided at the axial center position, which is disposed on the end surface of the light rod portion 153 along the shaft. To the uniformly distributed circular blind holes 155.
  • the drive tool extends into more than two circular blind holes 155 as the expansion sleeve is expanded.
  • the outer side wall of the shrink member 157 includes a constricted conical surface 159 for driving the contraction sleeve 158 to contract, a cylindrical curved surface 160 connected to the large end of the conical conical surface 159, a conical surface 159 for axially extending through the contraction, and a cylindrical shape.
  • the bottom surface of the groove 161 is a cylindrical curved surface concentric with the cylindrical curved surface 160.
  • the sleeve 162 includes a circular through hole 163 that cooperates with the screw 144, and a shrink sleeve that communicates with the circular through hole 163 receives the space hole 164.
  • the shrink sleeve receiving space hole 164 includes a circular hole 165 connected to the end surface of the circular through hole 163 and having a larger diameter than the circular through hole 163, a contraction driving tapered hole 166 whose small end is connected to the circular hole 165, and a contraction driving tapered hole 166.
  • the large-end-connected circular hole 167 is formed on the hole wall of the circular hole 167 and the contraction drive tapered hole 166, and the rib 168 is engaged with the groove 161.
  • the inner peripheral surface of the ridge is flush with the circular hole 165.
  • the limiting mechanism is a first circlip 169 and a first card slot 150 disposed at an end of the polished rod portion 149 of the connecting core 141.
  • the first circlip 169 is a broken ring shape.
  • the first snap spring 169 is mounted in the first latching groove 150, and the sleeve 162 is axially resisted by the first snap spring 169 to prevent the sleeve 162 and the shrink sleeve 158 from loosening and shrinking.
  • the sleeve 158 remains in a fully contracted state.
  • connection method is different from that of Embodiment 1:
  • the light rod portion 149 of the connecting core rod 141 is passed through the circular through hole 170 of the attachment member 137, and the second wedge-shaped resisting portion 148 of the connecting core rod 141 protrudes from the attachment member 137;
  • the circular through hole 163 and the shrink sleeve 158 of the sleeve 162 mounted together are mounted on the connecting core rod 141 through the polished rod portion 149 of the connecting core rod 141, and the shrink sleeve 158 protrudes toward the side of the attached member 137 to protrude the sleeve 162.
  • the first circlip 169 is then mounted in the first card slot 150 and the sleeve 162 and the connecting mandrel 141 are held in a fixed position by the first circlip 169 against the sleeve 162 to prevent the sleeve 162 and the shrink sleeve 158 from coming loose.
  • the shrink sleeve 158 is maintained in a fully contracted state.
  • the shrink-expandable fastening joint assembly further includes an outer spring 223 and an outer spring 224.
  • the outer side wall of the shrink member 228 includes a conical curved surface 229 for contracting the shrink sleeve 227, a cylindrical curved surface 230 connected to the small end of the conical curved surface 229, and a large end connected to the conical curved surface 229 for contraction.
  • a connecting curved surface 232 having an externally threaded portion 231, a conical curved surface 233 having a small end connected to the end surface of the connecting curved surface 232 and projecting the connecting curved surface 232, a cylindrical curved surface 234 connected to the large end of the conical curved surface 233, a large end and a cylindrical curved surface 230 connected to the conical conical surface 235, a plurality of inverted L-shaped protrusions 236 disposed on the end surface of the conical curved surface 235, the protrusions 236 and the end surface of the conical surface 235 form a second card slot 237,
  • An outer spring receiving groove 238 that engages with the outer spring 223 on the outer circumference of the cylindrical curved surface 234 is provided, and an outer spring receiving groove 239 that is fitted to the outer spring 224 on the outer circumference of the cylindrical curved surface 230.
  • the sleeve 240 is provided with a shrink sleeve receiving space 241, a circular through hole 242 communicating with the shrink sleeve receiving space 241, and a rotation preventing groove 249 provided on the end surface of the sleeve 240.
  • the shrink sleeve housing space 241 includes a tapered hole 243 whose small end is connected to the circular through hole 242, a receiving hole 245 which is connected to the large end of the tapered hole 243 and which is provided with the internal thread portion 244, and the small end is connected to the receiving hole 245 for contraction.
  • the tapered bore 246 is driven, a cylindrical bore 247 connected to the large end of the shrinking drive tapered bore 246, and a tapered bore 248 having a small end connected to the cylindrical bore 247.
  • the limiting mechanism is a thread locking mechanism, which is an external thread portion 231 on the shrink member 228 and an internal thread portion 244 that is screwed into the sleeve 240 on the male thread portion 231.
  • the inner spring 250 is mounted in the shrink sleeve 227, the inner spring 250 is completely received in the inner spring receiving groove 252, the inner spring 253 is installed in the shrink sleeve 227, and the inner spring 253 is completely received in the inner spring receiving groove 254.
  • Inside. Outer spring The outer spring 223 is completely received in the outer spring receiving groove 238; the outer spring 224 is mounted outside the shrink sleeve 227, and the outer spring 224 is completely received in the outer spring receiving groove 239.
  • the outer spring 223 and the outer spring 224 do not automatically separate the shrink members 228 that are held together to form the shrink sleeve 227.
  • the shrink sleeve 227 to which the inner spring 250, the inner spring 253 and the outer spring 223 and the outer spring 224 are mounted is mounted in the sleeve 240, and the shrink sleeve 227 is resisted by the elastic force of the inner spring 250 and the inner spring 253 radially outward. Inside the canister 240. The above process is completed at the factory.
  • the connecting core rod 225 is provided with one end of the second wedge-shaped resisting portion 226 passing through the circular through hole 256 of the attachment member 255, and the second wedge-shaped resisting portion 226 of the connecting core rod 225 protrudes from the attachment member 255. .
  • the circular through hole 242 and the shrink sleeve 227 of the sleeve 240 that are mounted together are passed through the connecting core rod 225.
  • One end of the second wedge-shaped resisting portion 226 is mounted on the connecting core rod 225, and the shrink sleeve 227 is axially received by the attached member 255.
  • the second wedge-shaped resisting portion 226 of the connecting core rod 225 extends into the corresponding second wedge-shaped resisting groove 258 of the shrink sleeve 227 to form a snap, and the internal thread portion 244 and the external thread portion of the thread locking mechanism
  • the 231 threads are coupled together to prevent the sleeve 240 and the shrink sleeve 227 from coming loose, keeping the shrink sleeve 227 in a fully retracted state.
  • the second retaining spring 259 is mounted in the second latching slot 237 and resists the sleeve 240 by the second retaining spring 259.
  • connection method is different from that of Embodiment 4:
  • the inner spring 250 is mounted in the inner spring receiving groove 252, the inner spring 253 is mounted in the inner spring receiving groove 254; the outer spring 223 is mounted in the outer spring receiving groove 238, and the outer spring 224 is mounted on the outer spring receiving portion.
  • the shrinking members 228 held together by the outer spring 223 and the outer spring 224 are not automatically separately assembled to form the shrink sleeve 227; the inner spring 250, the inner spring 253 and the outer spring 223, the outer spring will be mounted
  • the shrink sleeve 227 of the 224 is mounted in the sleeve 240, and the shrink sleeve 227 is resisted in the sleeve 240 by the elastic force of the inner spring 250 and the inner spring 253; the above process is generally completed at the factory or at the installation site. ;
  • the circular through hole 242 and the shrink sleeve 227 of the sleeve 240 that are mounted together are passed through the connecting core rod 225.
  • One end of the second wedge-shaped resisting portion 226 is mounted on the connecting core rod 225, and the shrink sleeve 227 faces the attached member 255.
  • the sleeve 240 is laterally protruded, and the sleeve 240 is applied with an axial force toward the attachment member 255.
  • the sleeve 240 and the shrink sleeve 227 are simultaneously moved toward the attachment member 255 until the shrink sleeve 227 abuts against the attachment member 255.
  • the sleeve 240 is applied with an axial force toward the attachment member 255, and the contraction of the sleeve 240 is slid with the drive conical hole 246 on the conical surface 233 of the contraction sleeve 227, and the sleeve 240 drives the contraction sleeve 227 to contract, each flap
  • the shrinking member 228 only moves radially, and the second wedge-shaped resisting portion 226 on the connecting core rod 225 extends into the corresponding second wedge-shaped resisting groove 258 of the shrink sleeve 227, and the surface and the surface resist each other to form a snap until the shrink sleeve 227 is not engaged. Further radial movement, the shrink sleeve 227 is in a fully contracted state;
  • the shrink sleeve 227 is in a fully retracted state, and the sleeve 240 is continuously rotated.
  • the contraction of the sleeve 240 is used to drive the small end of the tapered bore 246 over the large end of the constricted curved surface 233 of the shrink sleeve 227, the internal thread of the locking mechanism and The external thread begins to be screwed, and the sleeve 240 continues to slide a distance relative to the shrink sleeve 227 until the second slot 237 on the shrink sleeve 227 passes over the end face of the sleeve 240 to stop the rotating sleeve 240;
  • the locking sleeve 240 and the shrink sleeve 227 are screwed through the internal thread portion 244 of the sleeve 240 and the external thread portion 231 of the shrink sleeve 227 to prevent the sleeve 240 and the shrink sleeve 227 from being loosened, so that the shrink sleeve 227 is maintained in a fully contracted state. ;
  • the second circlip spring 259 is mounted in the second card slot 237 and resists the sleeve 240 by the second circlip spring 259, preventing the sleeve 240 from being reversed.
  • the second circlip 259 is first removed from the second slot 237, and then the sleeve 240 is reversely rotated.
  • the connecting core rod 287 includes a resisting head portion 271 that is axially resisted by the expansion sleeve 270, and the large end portion and the resisting head portion 271.
  • the end face is connected to the cone 272, the cylindrical straight rod portion 273 connected to the small end of the cone 272, the expansion driving cone 274 connected to the straight rod portion 273 at the large end, and the small end of the expansion driving cone 274 is connected.
  • the screw 275 is connected to the end surface of the screw 275 and has an outer diameter smaller than the straight rod portion 276 of the screw 275, a cone 277 whose big end is connected to the straight rod portion 276, and a cylindrical straight rod portion 278 which is connected to the small end of the cone 277.
  • the four independent annular second wedge-shaped abutting portions 279 provided on the outer circumference of the straight rod portion 278 are provided on the outer peripheral surface of the cone 272, the straight rod portion 273, and the expansion driving cone 274.
  • the outer side surface of the shrink member 280 has an arc shape.
  • a first contraction expansion projection 282 for contracting and expanding the shrink sleeve 281 is provided on the outer side surface of the shrink member 280, and is used for the second contraction expansion symmetrical with respect to the center position of the first contraction expansion projection 282. Projection 283.
  • the first contraction expansion projection 282 includes a constriction taper 284 at the first contraction expansion.
  • the expansion tapered portion 285 for expanding and contracting the sleeve 281 is formed by the side of the projection 282 facing away from the contracting tapered surface 284, and the cylindrical connecting surface 286 for connecting the contracting tapered surface 284 and the expanding tapered recess 285 is provided. .
  • the contraction taper 284 of the shrink sleeve 281 coincides with the taper direction of the expansion tapered recess 285.
  • the inner side surface of the shrink member 280 includes a cylindrical curved surface 289 that cooperates with the straight light rod portion 276 of the connecting core rod 287 in a contracted state of the shrink sleeve 281, a conical curved surface 290 that cooperates with the cone 277, and a cylindrical shape that cooperates with the conical curved surface 290.
  • An inner spring receiving groove 303 is provided on the wall of the cylindrical curved surface 289, and a second wedge-shaped resisting groove 304 and an inner spring receiving groove 305 which cooperate with the second wedge-shaped resisting portion 279 are provided on the wall of the cylindrical curved surface 291.
  • the sleeve includes a first sleeve 292 and a second sleeve 293.
  • the first sleeve 292 includes a cylindrical first sleeve body 294, a circular through hole 295 penetrating through the first sleeve body 294, and an external thread portion 296 disposed on the outer circumferential surface of the first sleeve body 294.
  • the resisting portion 297 of the sleeve body 294 is disposed in the first shrink-up expansion receiving groove 298 of the first through-contracting projection 282 on the hole wall of the circular through-hole 295.
  • the second sleeve 293 includes a second sleeve body 299, a threaded counterbore 300 disposed in the second sleeve body 299, and a circular through hole 301 communicating with the threaded counterbore 300, protruding from the protrusion of the second sleeve body 299 302.
  • a second shrinkage expansion accommodating groove 303 that is provided on the hole wall of the circular through hole 301 and that engages with the second contraction expansion projection 283.
  • the first sleeve 292 and the second sleeve 293 are threadedly coupled to the threaded counterbore 300 by an externally threaded portion 296.
  • the second contraction expansion accommodating groove 303 and the first contraction expansion accommodating groove 298 are symmetrical about their center positions.
  • the limiting mechanism is a thread locking mechanism comprising an externally threaded portion 296 disposed on the first sleeve 292 and a threaded counterbore 300 disposed on the second sleeve 293.
  • the shrink-expandable fastening connection assembly also includes a circular tube 320.
  • An external thread portion 321 is disposed on the outer circumferential surface of the circular tube 320; and a single-lobed contraction receiving side hole 323 radially extending through the side wall 322 is disposed on the side wall 322 of the circular tube 320 where the external thread portion 321 is not provided.
  • the end portion of the threaded portion 321 is provided with a protruding portion 324, and the protruding portion 324 is provided with a second engaging groove 325.
  • the shrink member 326 is a four-lobed.
  • the outer side wall of the shrink member 326 includes a conical curved surface 328 for contracting the contraction sleeve 327, a cylindrical curved surface 334 connected to the large end of the conical curved surface 328, and a conical cone connected to the cylindrical curved surface 334.
  • a curved surface 335 is a cylindrical curved surface 332 connected to the large end of the conical curved surface 335.
  • the inner side wall of the shrink member 326 includes a cylindrical curved surface 329 that is fitted at one end to the outer circumference of the side wall 322 of the circular tube 320, a peripheral portion 337 that cooperates with the small rod 336 that connects the core rod 330, and one end and the outer circumference of the side wall 322 of the circular tube 320. Fitted cylindrical surface 338.
  • a sleeve receiving space 340 is provided in the sleeve 339, and a threaded through hole 341 communicating with the shrink sleeve housing space 340 is provided.
  • the shrink sleeve housing space 340 includes a tapered hole 342 whose small end is connected to the threaded through hole 341, a first cylindrical hole 343 connected to the large end of the tapered hole 342, and a contraction driving tapered hole 344 whose small end is connected to the first cylindrical hole 343.
  • a second cylindrical hole 345 connected to the large end of the shrinking driving tapered hole 344, and a contracting driving tapered hole 219 connected to the second cylindrical hole 345 at the small end.
  • the limiting mechanism is a thread locking mechanism, which is a threaded through hole 341 in the sleeve 339 and an external threaded portion 321 threadedly connected to the circular tube 320 of the threaded through hole 341.
  • connection method is different from that of Embodiment 3:
  • the single-lobed contracting member 326 is mounted in the corresponding single-lobed contracting member 326 of the circular tube 320 to accommodate the side hole 323, and the outer spring 346 and the outer spring 347 are mounted outside the contracting member 326 to contract the contracting member 326 to form a contraction.
  • the sleeve 327; the inner spring 348 and the inner spring 349 are mounted in the shrink sleeve 327 to open the shrink sleeve 327 outwardly. In the uncontracted state of the shrink sleeve 327, the shrink sleeve 327 protrudes from the round tube 320; the above process is generally completed at the factory. Can also be completed at the installation site;
  • the round pipe 320 and the shrink sleeve 327 which are mounted together are passed through the connecting mandrel 330.
  • One end of the second wedge-shaped abutting portion 350 is attached to the connecting mandrel 330, and the axial force directed toward the appendage member 353 is applied to the sleeve 339.
  • the shrink sleeve 327 abuts against the attachment member 353, the sleeve 339, the shrink sleeve 327, the attachment member 353, and the base member 351 abut each other, the second wedge-shaped resisting groove 358 on the shrink sleeve 327 is connected
  • the second wedge-shaped resisting portion 350 on the core rod 330 is correspondingly facing;
  • the sleeve 339 is rotated to bring the shrink sleeve 327 into a fully retracted state.
  • the expansion member 380 includes an expansion member body 381 which is engaged with the circular blind hole 395 of the female member 383 and has an outer peripheral surface annular shape, and is protruded from the expansion member body.
  • a ring of convex rings on the 381, the rounded ring forms a first resisting projection 382.
  • a ring-shaped annular groove is formed in the wall of the hole of the circular blind hole 395 of the female member 383, and the annular groove forms a first abutting recess 384 that cooperates with the first abutting projection 382.
  • the diameter of the outer peripheral surface of the expansion member body 381 is equal to the diameter of the circular blind hole 395 of the parent member 383.
  • a ring-shaped resisting groove 389 is formed between the screw 386 and the screw 387 connecting the core rod 385 for resisting the end faces of the shrink sleeve 388, that is, the shrink sleeve resisting portion.
  • the inner side of the shrink member 390 is a cylindrical curved surface 391 equal to the diameter of the groove bottom 392 of 389.
  • the outer circumferential surface of the corresponding expansion member body 381 on the expansion sleeve is distributed on the same circumferential surface, and is tightly fitted with the circular blind hole 395 of the female member 383; the outer circumferential surface of the first resisting projection 382 of the expansion sleeve Distributed on the same circumference.
  • the shrink member 390 In the fully contracted state of the shrink sleeve 388, the shrink member 390 extends into the resisting groove 389 of the connecting core rod 385, and the groove bottom 392 of the shrinking member 390 embracing the retaining groove 389 constitutes a shrink sleeve 388, and the cylindrical curved surface 391 of the shrink sleeve 388 is distributed. On the same circumferential surface, the groove bottom 392 of the resisting groove 389 abuts.
  • One end of the shrink sleeve 388 is resisted by the resisting groove 389 toward the wall of the screw 386, the other end is resisted by the attachment member 395, the shrink sleeve 388 is engaged with the resist groove 389, and the threaded through hole 394 in the sleeve 393 is screwed at
  • the screw 387 of the connecting core rod 385 is used to lock the sleeve 393 and the connecting core rod 385.
  • the sleeve 393 radially resists the limit of the shrink sleeve 388, and the shrink sleeve 388 is fixed with the connecting core rod 385.
  • the stopper mechanism is a circular ring 432 provided on the outer circumference of the end portion of the sleeve 430 facing the one end of the joint member 431, and a countersunk head passing through the circular collar 432.
  • the hole 433 secures the rounded ring 432 to a fastener (not shown) on the connected piece 431.
  • the embodiment according to the present invention can be fully realized.
  • the parent member and the attached member in the present invention are convenient for expression, and only show a schematic diagram connected by a shrink-expandable fastening joint assembly.
  • the shrink-expandable fastening joint assembly of the present invention is equivalent to a screw.
  • the shrink-expandable fastening assembly of the present invention can be used where screws can be used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

L'invention concerne un ensemble de raccordement à fixation du type à contraction et expansion et une structure de raccordement à fixation du type à contraction et expansion et un procédé de raccordement. La structure de raccordement à fixation du type à contraction et expansion comprend l'ensemble de raccordement à fixation du type à contraction et expansion, un élément principal et un élément auxiliaire; une première partie d'évidement de blocage est disposée sur l'élément principal; l'ensemble de raccordement à fixation du type à contraction et expansion comprend une tige centrale de raccordement, un manchon d'expansion, un élément d'entraînement d'expansion, un manchon de contraction, un cylindre de manchon permettant d'amener le manchon de contraction à se contracter, une structure de limitation permettant d'empêcher le cylindre de manchon de devenir lâche lorsque le manchon de contraction est complètement contracté; la tige centrale de raccordement comprend une surface conique d'entraînement pour l'expansion, une partie tête de blocage et une partie de blocage d'élément de contraction; l'élément d'expansion comprend une première partie d'extrusion de blocage et une surface conique pour l'expansion; une surface conique pour la contraction est disposée sur la surface externe de l'élément de contraction; et une surface conique d'entraînement pour la contraction est disposée à l'intérieur du manchon de contraction. La présente invention concerne un raccordement fiable qui ne présente pas de défaillance même dans de mauvaises conditions comme lorsque la charge, en particulier la charge axiale, est importante, lorsqu'une vibration est intense, lorsque la température est élevée ou lorsque la température varie entre des températures extrêmes (élevées et basses).
PCT/CN2015/086417 2014-08-08 2015-08-07 Ensemble de raccordement à fixation du type à contraction et expansion et structure de raccordement à fixation du type à contraction et expansion et procédé de raccordement Ceased WO2016019917A1 (fr)

Applications Claiming Priority (2)

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CN201410391020 2014-08-08

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CN115446753A (zh) * 2022-10-08 2022-12-09 江西万泰铝业有限公司 一种铝块定位夹紧机构
CN116237895A (zh) * 2023-02-27 2023-06-09 浙江金马逊智能制造股份有限公司 一种管件芯棒快速更换装置
CN117005321A (zh) * 2023-08-23 2023-11-07 中铁七局集团有限公司 一种钢结构桥梁的结构及其建造方法

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CN106968336B (zh) * 2017-05-12 2023-10-13 天津大学 一种钢构件之间的摩擦自锁连接件
CN107338867A (zh) * 2017-07-31 2017-11-10 天津大学 一种可解锁的模块化钢结构插入自锁式节点
CN107338867B (zh) * 2017-07-31 2023-12-01 天津大学 一种可解锁的模块化钢结构插入自锁式节点
CN109974981A (zh) * 2017-12-27 2019-07-05 核动力运行研究所 一种卡爪疲劳测试装置
CN109974981B (zh) * 2017-12-27 2024-05-14 核动力运行研究所 一种卡爪疲劳测试装置
CN109361974B (zh) * 2018-11-13 2023-09-12 衡阳师范学院 一种演唱用话筒支架
CN109361974A (zh) * 2018-11-13 2019-02-19 衡阳师范学院 一种演唱用话筒支架
CN109869393A (zh) * 2019-03-26 2019-06-11 张向洪 一种家具二合一连体快装连杆
CN110044382A (zh) * 2019-04-30 2019-07-23 西安中科微星光电科技有限公司 一种远程锁紧机构和连接器
CN110044382B (zh) * 2019-04-30 2024-02-09 西安中科微星光电科技有限公司 一种远程锁紧机构和连接器
CN110454650A (zh) * 2019-08-15 2019-11-15 宁波印天智能科技有限公司 具有快速拆装结构的显示器支架
CN111894994A (zh) * 2020-08-31 2020-11-06 成都中车电机有限公司 一种直轴类电机试验联轴器及其使用方法
CN113700245B (zh) * 2021-07-27 2022-08-19 深圳市建筑装饰(集团)有限公司 一种隔音轻质的石膏装饰隔墙板
CN113700245A (zh) * 2021-07-27 2021-11-26 深圳市建筑装饰(集团)有限公司 一种隔音轻质的石膏装饰隔墙板
CN114151057B (zh) * 2021-12-08 2023-08-04 安徽理工大学 一种煤岩钻孔高压水力压裂实验装置及其使用方法
CN114151057A (zh) * 2021-12-08 2022-03-08 安徽理工大学 一种煤岩钻孔高压水力压裂实验装置及其使用方法
CN115446753A (zh) * 2022-10-08 2022-12-09 江西万泰铝业有限公司 一种铝块定位夹紧机构
CN115446753B (zh) * 2022-10-08 2024-04-30 江西万泰铝业有限公司 一种铝块定位夹紧机构
CN116237895A (zh) * 2023-02-27 2023-06-09 浙江金马逊智能制造股份有限公司 一种管件芯棒快速更换装置
CN117005321A (zh) * 2023-08-23 2023-11-07 中铁七局集团有限公司 一种钢结构桥梁的结构及其建造方法

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