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WO2016019913A1 - Structure de raccordement et procédé de raccordement par fixation à expansion, et ensemble de raccordement par fixation à expansion - Google Patents

Structure de raccordement et procédé de raccordement par fixation à expansion, et ensemble de raccordement par fixation à expansion Download PDF

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Publication number
WO2016019913A1
WO2016019913A1 PCT/CN2015/086413 CN2015086413W WO2016019913A1 WO 2016019913 A1 WO2016019913 A1 WO 2016019913A1 CN 2015086413 W CN2015086413 W CN 2015086413W WO 2016019913 A1 WO2016019913 A1 WO 2016019913A1
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Prior art keywords
expansion
driving
hole
expansion sleeve
rod
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PCT/CN2015/086413
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English (en)
Chinese (zh)
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杨东佐
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Individual
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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 an expansion fastening connection structure and a connection method for mechanically and statically coupling two or more objects, an expansion fastening connection assembly, and particularly a mechanical static connection which can replace an expansion screw, a crucible or the like on a wood product or the like.
  • Expansion joint structure and connection method of two or more objects, expansion fastening joint assembly are particularly a mechanical static connection which can replace an expansion screw, a crucible or the like on a wood product or the like.
  • ⁇ Connection ⁇ (pronounced as s ⁇ n m ⁇ o) is a combination of bumps and joints used on two wooden members.
  • the protruding part is called ⁇ (or hoe); the concave part is called ⁇ (or blinking, grooving), and ⁇ and ⁇ are engaged to play a connecting role.
  • China's ⁇ connection technology is the earliest connection technology of human beings. It is the earliest and applied detachable connection technology in human society, especially applied to wood furniture and wood buildings. These concrete structures are mainly used in the construction of the Hemudu dry-type houses, with convex squares, round plaques, double-layered bulges, dovetails and shackles.
  • 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:
  • the end can be embedded in the mother body, and the scope of use is limited. It is suitable for fastening installation or fitting nut on brick, tile, cement, wood structure and other inconvenient tapping components, and is not suitable for mechanical parts, especially metal mechanical parts.
  • the second is mainly relying on the expansion and deformation of the tail end of the expansion plug to generate a large radial static pressing force on the inner wall of the mother wall hole, the static friction force generated by the radial pressing force and the deformation of the tail end of the expansion plug body.
  • the resisting force connects the expansion plug body, the mother body and the attached body 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 tail end of the expansion plug body can be expanded The magnitude of the deformation is small, and the static friction force generated by the radial pressing force with the inner wall of the wall 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 A slight amount of sliding friction occurs between the walls of the mother body.
  • the expansion bolt of this structure is not suitable for occasions with large load or large vibration, and is not suitable for the case where the expansion bolt installed under the parent body is subjected to a large axial load, It is recommended that the expansion bolt is used to fasten the ceiling fan and the like; thirdly, 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 pull pin.
  • 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 very strong. Small, the shortcomings of the threaded connection will be reflected at any time; second, the two half-shells cannot be axially positioned 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 existing low-hardness materials of the parent member such as wood, plastic, etc., and to use threaded connecting threads such as screws or bolts to easily slide the wire, and to be loosely connected by the ⁇ structure, and to be embedded.
  • the technical problem of complicated process and high cost provides that the hardness of the material of the parent component is much lower than the hardness of the material of the expansion fastening component, and the matrix structure and the attachment component are connected by the integral structure in the axial direction, and the expansion is relied on
  • the static frictional force of the expansion and the abutting force embedded in the parent member connect the parent member and the expansion member together, and the expansion member and the attachment member are connected together by the abutting force, even if the load is large, especially the axial load is large, or the vibration is large. In the case of bad occasions, the connection will not fail, the connection is very reliable, the expansion fastening assembly and the expansion fastening structure.
  • An expansion fastening connection structure comprising an expansion fastening connection assembly, a parent member, and an attachment member;
  • the expansion fastening connection assembly comprises a drive core member and two or more expansion members; the expansion member constitutes an expansion sleeve for holding the drive core member;
  • the expansion member is a stamping member stamped from a metal sheet; each of the expansion members includes an expansion member body having a peripheral surface and a hole in the base member and a through hole in the attachment member, and is inward on the inner circumference of the expansion member body Stamping to form an inner convex portion; on the outer circumference of the expansion member body, punching outwardly to form a pointed protrusion for embedding the low-hardness material of the parent member, and punching and bending at the end portion of the expansion member body to form an axial direction of the expansion sleeve Positioning, fixing the attachment member to the base member and radially protruding the positioning abutting portion of the expansion member body; the inner convex portion is provided with an expansion cone surface matched with the driving cone surface; and the outer circumference of the expansion member body Forming a recess on the surface corresponding to the position of the inner convex portion;
  • the driving core member is installed in the driving core member accommodating space, and the expanding member body is installed in the hole on the female member and the through hole in the attached member;
  • the positioning resisting portion of the expansion sleeve protrudes from the through hole on the attachment member and is axially resisted and positioned by the attachment member;
  • the pointed protrusion is embedded in the parent member, and the outer peripheral surface of the expansion member body of the expansion member that is held together is distributed on the same circumferential surface, and is tightly fitted with the circular hole in the parent member; the female member is inflated
  • the expansion static friction force of the circular hole of the parent member and the abutting force of the tip protrusion embedded in the parent member cooperate to axially resist, the attachment member is axially resisted by the positioning resisting portion, and the expansion sleeve connects and fixes the attachment member and the parent member. together.
  • connection method for an expansion fastening structure comprising the following steps:
  • an expansion fastening assembly comprising a drive core member and two or more expansion members; the expansion member forming an expansion sleeve for holding the drive core member;
  • the expansion member is a stamping member stamped from a metal sheet, and each of the expansion members includes an expansion member body that cooperates with a hole in the base member and a through hole on the attachment member, and is stamped and formed on the inner circumference of the expansion member body.
  • a cylindrical surface of the driving core rod and a convex surface of the expansion cone are stamped to form a concave portion at a position corresponding to the convex portion on the outer circumferential surface of the expansion sleeve body;
  • a tip protrusion formed on the outer circumference of the body of the expansion member which is formed by outward punching and folding, and is used for embedding a low-hardness material, and is bent and bent at the end of the body of the expansion member to form an axial position of the expansion sleeve.
  • the attachment member abuts against the positioning member of the body member and radially protrudes from the expansion member body;
  • the maximum distance from the positioning abutting portion to the axis of the expansion body is greater than the maximum distance from the tip protrusion to the axis of the expansion body;
  • the driving core member is installed in the driving core member accommodating space, the through hole on the attached body member faces the hole in the parent member, and the expansion member body of the expansion sleeve extends through the through hole in the attached member to extend into the female member In the upper hole, the attachment member of the expansion sleeve is positioned to resist axial positioning, and the expansion member body is mounted in the hole on the parent member and the through hole on the attachment member;
  • the driving core member drives the expansion sleeve to expand, and the radial expansion of each of the expansion members
  • the expansion sleeve secures the attachment member to the parent member.
  • the expansion member body is mounted in the hole on the base member and the through hole on the attachment member, the drive core member is mounted in the drive core member accommodation space, and the positioning resisting portion of the expansion sleeve protrudes from the through hole on the attachment member, and
  • the attached member resists positioning; in the fully expanded state of the expansion sleeve, the expansion member body and the hole of the parent member are tightly fitted to form an expansion static friction force, the tip protrusion is embedded in the parent member to form a resisting force, and the positioning resisting portion applies the attached member.
  • the abutting force in the axial direction, the expansion sleeve connects and fixes the attachment member and the parent member.
  • An expansion fastening assembly comprising a drive core member and two or more expansion members; the expansion member forming an expansion sleeve for holding the drive core member;
  • a driving cone surface for driving expansion of the expansion sleeve is disposed on the driving core member
  • a driving core member accommodating space is disposed in the expansion sleeve, and a expansion taper surface matched with the driving cone is disposed on the wall of the driving core member accommodating space;
  • Each of the expansion members includes an expansion member body that cooperates with a hole in the base member and a through hole on the attachment member, and a tip protrusion for inserting the parent member of the low-hardness material is provided on the outer circumference of the expansion member body.
  • the end portion of the expansion member body is further provided with a positioning portion resisting the axial direction of the expansion member, the auxiliary member is resisted and fixed on the female member, and the expansion member body is radially protruded;
  • the driving core rod includes a head and a head a large light rod portion connected to the portion, a driving cone connected to the large light rod portion at the big end, and a small rod connected to the driving cone;
  • the driving core housing accommodating space is matched with the large rod portion, the driving cone and the small rod of the driving core rod portion
  • a positioning resisting receiving groove capable of completely accommodating the positioning abutting portion is provided at a head of the expanding core rod.
  • each of the pointed projections is one or more sharp spikes formed by punching and then folding.
  • each of the pointed protrusions is a convex hull formed by punching, and a through hole is formed on the convex hull.
  • the expansion fastening assembly further includes a cap; the cap includes an inner cavity, a buckle is protruded from a bottom surface of the inner cavity; an anti-slot groove is disposed on the expansion sleeve or the driving core member; and the expansion sleeve is fully expanded
  • the cap is snap-fitted onto the abutment groove to be fitted with the expansion sleeve or the drive core member, the expansion sleeve protruding the parent member and/or the attachment member, or the expansion sleeve protruding from the parent member and/or the attachment member And driving the core member is received in the inner cavity of the cap.
  • the expansion fastening assembly further includes a cap; the cap includes an inner cavity, a protrusion on the bottom surface of the inner cavity, a threaded hole in the protrusion; and a convex expansion sleeve on the driving core Threaded portion; in the fully expanded state of the expansion sleeve, the threaded hole of the cap is threaded on the driving core rod, and the protruding female
  • the expansion sleeve of the body member and/or the attachment member, or the expansion sleeve and the drive core member of the protruding parent member and/or the attachment member are received within the lumen of the cap.
  • the cap is provided to cover the expansion sleeve and the driving core member, and the appearance is not only beautiful, but also dustproof, waterproof, anti-sunlight, etc., which greatly reduces the damage of the expansion fastening component to the external environment, and greatly improves the expansion tightness. Connection reliability and service life of solid connection components. Caps can be placed only on the side facing the environment, such as outdoors. If the environment on both sides is bad, caps should be provided on both sides.
  • the driving core member comprises a core rod, and a cap is integrally formed at an end of one end of the core rod; the cap includes an inner cavity; and the expansion sleeve of the parent member and/or the attached member is protruded in a fully expanded state of the expansion sleeve The expansion sleeve and the drive core protruding from the parent member and/or the attachment member are received within the inner cavity of the cap.
  • the spring further comprises a spring receiving groove radially on the outer peripheral surface of each of the expansion members, and the expansion members of the two or more petals are assembled by the spring to form an expansion sleeve, and the spring is completely accommodated in the spring capacity.
  • the expansion on the expansion sleeve is hung on the driving cone surface; the positioning resisting portion on the expansion sleeve is circumferentially distributed to form a broken independent ring.
  • the driving core member is installed in the accommodating space of the driving core member, and then the expansion members of the two lobes or more are assembled by the spring to form the expansion sleeve so as not to be separated, and the expansion fastening assembly is assembled at the factory, and during transportation. It won't spread out, it's more convenient, fast and easy to use.
  • the driving core member comprises a driving core rod, a driving nut matched with the driving core rod;
  • the driving core rod comprises a small rod provided with a thread, and the first formed by the driving cone surface connected to the small rod a driving cone, a first straight beam portion connected to the big end of the first driving cone; a driving core receiving space of the expansion sleeve in an unexpanded state, a small rod for driving the core rod, a first driving cone, and a first straight beam
  • the driving core housing accommodating space further comprises a nut accommodating groove matched with the driving nut; the driving nut is installed in the nut accommodating groove, and the small rod of the driving core rod extends into the driving nut and is screwed with the driving nut, and the driving core The rod is mounted in the expansion sleeve.
  • the positioning resisting portion of the expansion sleeve is axially resisted by the attachment member, and the expansion sleeve has no axial movement, and the driving core rod causes the first driving cone to generate axial movement toward or away from the direction of the driving nut.
  • the driving core rod causes the first driving cone to generate an axial movement toward the driving nut, and the first driving cone of the driving core rod slides relative to the first expansion tapered surface of the expansion sleeve, and the expansion sleeve expands.
  • connection force is the axial abutting force of the wedge-shaped abutting portion of the expansion sleeve to the female member and the axial abutting force of the positioning member of the expansion sleeve against the attachment member.
  • the drive mandrel is not directly connected to the parent member and the appendage member, and is only used to drive the expansion sleeve to expand.
  • the driving core rod has a small force, so although the threaded engagement between the driving core rod and the driving nut is not easy to cause the connection failure of the sliding wire.
  • the driving core rod further comprises a connecting cone connecting the big end with the first straight light rod portion, a second straight light rod portion connected to the small end of the connecting cone, the small end connected to the second straight light rod portion, and the first formed by the driving cone surface Two drive cones,
  • the third straight beam portion connected to the large end of the second driving cone, the driving core receiving space is also matched with the connecting cone, the second straight rod portion, the second driving cone, and the portion of the third straight rod portion.
  • the expansion fastening assembly of the structure, the first driving cone and the second driving cone on the driving core rod are used to drive the expansion sleeve expansion, and the expansion sleeve expands more evenly due to the expansion mode of the double driving, and the expansion effect is more Ok, so that the connection works better.
  • the driving core member is a driving core rod
  • the driving core rod includes a small end of the light rod
  • the driving cone formed by the driving cone surface is connected with the small end and cooperates with the expansion cone surface in the expansion sleeve.
  • the body, the straight light rod portion connected to the big end of the driving cone, is connected to the straight light rod portion and radially protrudes from the resisting portion of the straight light rod portion.
  • connection When the connection is realized, the driving core rod is directly knocked into the expansion sleeve to fully expand the expansion sleeve.
  • the expansion and fastening connection assembly of this structure has a simple structure and low cost.
  • the driving core member comprises a driving core rod, a driving nut matched with the driving core rod;
  • the driving nut comprises a driving cone formed by the driving cone surface, a threaded hole disposed at the axial center position;
  • the driving core The rod includes a small end provided with a threaded portion that cooperates with a threaded hole of the drive nut, a small end that is coupled to the small end and that cooperates with the expansion cone in the expansion sleeve, a drive cone formed by the drive cone, and a large end of the drive cone
  • the connected straight light rod portion is connected with the straight light rod portion and radially protrudes from the resisting portion of the straight light rod portion; in the unexpanded state of the expansion sleeve, the driving core housing receiving space and the driving nut, the small end portion of the driving core rod, the driving cone
  • the body, a part of the straight light rod portion and the resisting portion are matched; the small rod of the driving core rod is screw-fit
  • the rotary drive core rod can drive the driving cone of the driving core rod and the driving cone of the driving nut to slide relative to the corresponding expansion cone of the expansion sleeve to realize the expansion of the driving expansion sleeve. Since two expansion cones with opposite taper angles are arranged in the expansion sleeve, the two-direction multi-drive expansion is realized, so that the expansion process of the expansion sleeve is more balanced and the expansion effect is better, so that the connection effect is better.
  • the tip protrusion of the expansion member is embedded in the parent member, and the hoe of the ⁇ structure protrudes into the mortise, and the connection is very Reliable without the need to process the blink, the cost is much lower than the ⁇ structure.
  • the expansion member body and the hole of the parent member are tightly fitted to generate a static friction force, and on the other hand, the tip protrusion is embedded in the parent member to form an axial abutting force and a tight fit static friction force to expand the expansion member and the parent member.
  • the abutment members of the expansion members are used to couple the attachment member and the expansion member together by the abutting force of the expansion member, such that the expansion fastening assembly connects the attachment member with the parent member.
  • the connection force between the expansion fastening joint assembly and the parent member and the attachment member in the expansion fastening structure is not only the expansion static friction force, the connection force is greatly increased, the connection is very reliable, and the load is large, especially the axial load is large. In the environment with high vibration, no connection failure will occur.
  • the advantage of relying on the pre-tightening and static friction connection with the parent member is that it can be completely overcome.
  • the connection is more reliable than the ⁇ connection method which relies solely on the expansion static friction.
  • the invention completely breaks the static mechanical friction of the existing screw-connected screw or bolt by the pre-tightening, the mechanical static connection of the expansion screw or the expansion bolt, the expansion static friction force generated by the expansion or the deformation caused by the deformation of the expansion member Force to connect the inertial thinking of the object.
  • the pointed protrusion of the expansion member is processed in advance, and is not formed by expansion deformation.
  • the expansion member is designed to have two lobes (in which the expansion sleeve has the best effect of three lobes), and the expansion member does not deform during the expansion process.
  • the first is that the number and shape of the cusps can be freely designed according to the force, so It can bear a large external force as needed and the connection is very reliable.
  • the part of the expansion body corresponding to the hole on the parent member is completely tightly fitted with the hole on the mother member, which can provide greater expansion and static friction.
  • the driving core member only serves to expand the expansion member, and the auxiliary member is not fixed to the female member by the fastening member that is screwed with the driving core member, and the force of the core member is driven in the expanded state of the expansion member. Very small, even if the drive core member uses a threaded connection, it is almost impossible to cause the screw connection to fail, so that the fixing of the core member and the expansion member in the fully expanded state of the expansion sleeve is also very reliable.
  • the expansion sleeve is formed by stamping a metal sheet, and the tip protrusion on the formed expansion sleeve is simple in process, low in cost, and easy to form a sharp spur, which facilitates the embedding of the parent member in the expansion process.
  • the cooperation between the driving taper surface and the expansion taper surface only needs to have the same taper of the driving taper surface and the expansion taper surface, so that the driving core member can drive the expansion sleeve to expand, and the curvature can be different.
  • FIG. 1 is a front elevational view showing the expansion fastening structure of the first embodiment of the present invention in an unexpanded state of the expansion sleeve.
  • Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1;
  • FIG. 3 is a perspective view of the expansion fastening assembly of the embodiment 1 of the present invention.
  • FIG. 4 is a perspective exploded view of the expansion fastening assembly of the embodiment 1 of the present invention.
  • Fig. 5 is a front elevational view showing the expansion and fastening joint structure of the first embodiment of the present invention in a state in which the expansion sleeve is fully expanded.
  • Fig. 6 is a cross-sectional view taken along line B-B of Fig. 5;
  • Figure 7 is a cross-sectional view showing the center position of one of the expansion members of the expansion joint of the embodiment 2 of the present invention in an unexpanded state of the expansion sleeve.
  • Figure 8 is a perspective view of the expansion fastening assembly of the embodiment 2 of the present invention.
  • Figure 9 is a cross-sectional view showing the center position of one of the expansion members of the expansion joint of the embodiment 3 of the present invention in an unexpanded state of the expansion sleeve.
  • Figure 10 is a perspective exploded view of the expansion fastening assembly of Embodiment 4 of the present invention.
  • Figure 11 is a perspective exploded view of the expansion fastening assembly of Embodiment 5 of the present invention.
  • an expansion fastening structure includes an expansion fastening joint assembly 1, a base member 2, and an attachment member 3.
  • a circular blind hole 4 is provided in the parent member 2, and a circular through hole 5 is provided in the attached member 3.
  • the expansion fastening joint assembly 1 comprises a drive core member, an expansion sleeve 7 composed of a plurality of expansion members 6 having the same three-lobed structure, a spring 8, and a spring 9.
  • the drive core member includes a drive core rod 10, a drive nut 11 that cooperates with the drive core rod 10.
  • the drive nut 11 includes a drive cone 12, a cylindrical straight rod portion 13 connected to the large end of the drive cone 12, a threaded hole 14 disposed at the axial center position, and is disposed on the outer peripheral surface of the drive cone 12 and the straight rod portion 13
  • the combination of the adjacent two-lobed expansion members 6 of the expansion sleeve 7 engages with the gap-stopping ribs 15.
  • the drive spindle 10 includes a small rod 17 provided with an externally threaded portion 16 that cooperates with a threaded bore 14 of the drive nut 11, a drive cone 18 coupled to the small rod 17, and a cylindrical straight connection to the large end of the drive cone 18
  • the light rod portion 19 is connected to the straight light rod portion 19 and radially protrudes from the cylindrical resisting portion 20 of the straight light rod portion 19, and an inner hexagonal hole 21 is provided on the end surface of the resisting portion 20.
  • the axial length of the drive cone 12 is equal to the axial length of the drive cone 18, and the taper is the same for synchronous drive.
  • the three-lobed expansion member 6 is held on the drive nut 11 and the drive core rod 10 to form an expansion sleeve 7.
  • the expansion member 6 is a stamped product stamped from a metal sheet.
  • Each of the expansion members 6 includes an expansion member body 22 whose outer peripheral surface cooperates with the circular blind hole 4 on the parent member 2 and the circular through hole 5 on the attachment member 3; the inner circumference of the expansion member body 22 is inwardly punched to form a convex portion a portion 23; a tip protrusion 24 for inserting the parent member 2 and the attachment member 3 for inserting the low-hardness material on the outer circumference of the expansion member body 22; and punching and bending at the end of the expansion member body 22 Forming a positioning resisting portion 25 for axially positioning the expansion sleeve 7 to abut the fixing member 3 against the female member 2 and radially projecting the expansion member body 22; further forming an inwardly on the outer circumference of the expansion member body 22
  • the annular spring receiving groove 26 and the spring receiving groove 27 are provided.
  • the recessed portion 28 is stamped at a position corresponding to the inner convex portion 23 on the outer peripheral surface of the expander body 22.
  • the convex portion 23 is provided with an expansion tapered surface 29 which is engaged with the driving cone 12 of the driving nut 11 and has the same taper, and an expansion tapered surface 30 which is matched with the driving cone 18 of the driving core rod 10 and has the same taper degree, and The connecting curved surface 31 of the expansion tapered surface 29 and the expansion tapered surface 30 is connected.
  • Each of the pointed projections 24 is a convexly formed convex hull, and the pointed projections 24 are broken to form the through holes 32.
  • the maximum distance from the positioning abutment 25 to the axis of the expander body 22 is greater than the maximum distance of the pointed projection 24 to the axis of the expander body 22.
  • the threaded hole 14 of the drive nut 11 is screwed onto the drive spindle 10, between the small end of the drive cone 12 of the drive nut 11 to the small end of the drive cone 18 of the drive spindle 10
  • the axial distance is slightly smaller than the axial length of the connecting curved surface 31.
  • the anti-rotation rib 15 of the drive nut 11 projects into the coupling gap of the adjacent two-lobed expansion member 6.
  • the expansion cone 6 is held by the expansion taper 29 on the drive cone 12, and the expansion nut 6 is engaged with the drive nut 11 and the expansion cone 30 to engage the drive cone 18 to position the expansion member 6 and the drive core rod 10.
  • the three-valve expansion member 6 is coupled to the drive nut 11 and the drive core rod 10 by the spring 8 and the spring nut 9 to be automatically separated from each other to complete the connection of the expansion fastening assembly 1 .
  • the spring 8 is completely received in the spring receiving groove 26 .
  • the spring 9 is completely housed in the spring receiving groove 27.
  • the expansion sleeve 7 is provided with one end of the pointed projection 24 extending through the circular through hole 5 in the attachment member 3 into the circular blind hole 4 on the female member 2, and the expansion member body 22 is mounted on the circular blind hole 4 of the female member 2. And in the circular through hole 5 in the attachment member 3, the positioning abutting portion 25 of the expansion sleeve 7 protrudes from the circular through hole 5 on the attachment member 3 by the axial direction of the attachment member 3.
  • the pointed projection 24 is embedded in the parent member 2 and the attachment member 3, and the outer peripheral surface 33 of the expansion member body 22 of the expansion member 6 held together is distributed on the same circumferential surface, and the parent member 2
  • the hole wall of the inner blind hole 4 is tightly fitted, and the parent member 2 is axially resisted by the expansion static friction force of the expansion sleeve 7 and the circular hole of the parent member 2 and the abutting force of the tip protrusion 24 embedded in the parent member 2.
  • the body member 3 is axially resisted by the abutting force of the positioning abutting portion 25 and the tip protrusion 24 embedded in the appendage member 3, and the expansion sleeve 7 connects and fixes the appendage member 3 and the parent member 2 together.
  • the resisting portion 20 is resisted by the positioning abutment portion 25 of the expansion sleeve 7.
  • connection method for an expansion fastening structure comprising the following steps:
  • the threaded hole 14 of the drive nut 11 is screwed onto the drive core 10, and the axial distance between the small end of the drive cone 12 of the drive nut 11 to the small end of the drive cone 18 of the drive core 10 is slightly smaller than the connection curved surface 31.
  • the three-lobed expansion member 6 is hug on the drive nut 11 and the drive core rod 10.
  • the rotation-preventing rib 15 of the drive nut 11 extends into the joint gap of the adjacent two-valve expansion member 6, and is held by the expansion cone 29
  • the positioning expansion member 6 on the driving cone 12 and the driving nut 11, the expansion cone 30 is hung on the driving cone 18 to position the expansion member 6 and the driving core rod 10;
  • the spring 8 is mounted in the spring receiving groove 26, and the spring 9 is mounted in the spring receiving groove 27 to sandwich the three-lobed expansion member 6 with the driving nut 11 and the driving core rod 10 to complete the expansion fastening assembly. 1 connection;
  • a force toward the axial direction of the appendage member 3 is applied to the expansion sleeve 7, the attachment member 3 abuts against the parent member 2, the positioning abutment portion 25 abuts against the attachment member 3, and the expansion sleeve 7 is attached by the positioning abutment portion 25.
  • the body member 3 is axially resisted and positioned;
  • the driving nut 11 is synchronously moved by the screwing engagement with the driving core rod 10, and the driving cone 12 of the driving nut 11 slides on the expansion tapered surface 29, and the driving cone 18 of the driving core rod 10 is expanded.
  • the expansion sleeve 7 is slidably driven by the sliding surface 30, and each of the expansion members 6 is only moved radially, and the pointed projections 24 are embedded in the female member 2 and the attachment member 3; the resisting portion 20 is positioned by the expansion sleeve 7 to resist the portion 25. Resist, the expansion sleeve 7 is fully expanded;
  • the expansion sleeve 7 connects and fixes the attachment member 3 to the parent member 2.
  • the driving core member is a driving core rod 61.
  • the driving core rod 61 includes a small rod 62 of a polished rod, a driving cone 63 connected to the small rod 62, and a driving.
  • the inner peripheral surface 66 of the expander body 65 of the expansion member 60 is a circular arc surface concentric with the outer peripheral surface 67 of the expander body 65.
  • the inner convex portion 68 of the expansion member 60 is provided with an expansion tapered surface 69 which is fitted to the driving cone 63 and has the same taper, and a cylindrical curved surface 70 which is connected to the small end of the expansion tapered surface 69.
  • the diameter of the cylindrical curved surface 70 is equal to the outer diameter of the straight beam portion 64.
  • the diameter of the outer peripheral surface 67 of the expander body 65 is equal to the diameter of the circular blind hole 72 on the parent member 71 and the circular through hole 74 on the attachment member 73.
  • the driving vertebral body 63 of the driving core rod 61 abuts against the expansion tapered surface 69.
  • the straight light rod portion 64 and the wall of the cylindrical curved surface 70 are fitted together by surface-to-face engagement, and the outer circumferential surface 67 of the expansion member body 65 is distributed on the same circumferential surface, with the parent member 71
  • the hole wall of the circular blind hole 72 and the hole wall of the circular through hole 74 on the attachment member 73 are tightly fitted.
  • Connection methods include:
  • the three-lobed expansion member 60 is hug on the driving core rod 61, and is hung on the driving cone 63 by the expansion cone 69 to position the expansion member 60 and the driving core rod 61;
  • the three-lobed expansion member 60 and the driving core rod 61 are not automatically separated by the spring 76 and the spring 77;
  • One end of the expansion sleeve 75 with the pointed protrusion 79 is inserted through the circular through hole 74 of the attachment member 73 into the blind hole 72 in the parent member 71;
  • the driving core rod 61 is axially moved relative to the expansion sleeve 75, and the expansion sleeve 75 is slid and driven on the expansion cone 69 by the driving cone 63, and the expansion member 60 is radially moved.
  • the projection 79 is fitted into the parent member 71 and the attachment member 73; the outer peripheral surface 67 of the expansion member body 65 is tightly connected to the hole wall of the circular blind hole 72 on the parent member 71 and the hole wall of the circular through hole 74 on the attachment member 73.
  • the expansion sleeve 75 After the expansion sleeve 75 is fully expanded, the expansion sleeve 75 is no longer moved in the radial direction and remains in the fully expanded state, the drive core rod 61 continues to move relative to the axial direction of the expansion sleeve 75, and the straight rod portion 64 passes over the small rod of the expansion cone 69. 62 until the expansion sleeve 75 and the driving core rod 61 are completely mounted to the set position, and the driving core rod 61 stops driving;
  • the expansion sleeve 75 connects and fixes the attachment member 73 to the parent member 71.
  • the driving core 91 includes a small rod 92 provided with a threaded portion 90, a driving cone 93 connected to the small rod 92, and a straight end connected to the large end of the driving cone 93.
  • the light rod portion 94, the cap 95 of the straight light rod portion 94 is radially protruded, the inner cavity 98 of the positioning resisting portion 97 for accommodating the expansion sleeve 96 is provided on the cap portion 95, and the hexagon socket blind hole 101 is provided on the end surface of the cap portion 95. .
  • the positioning abutment portion 97 of the expansion sleeve 96 is completely received in the inner cavity 98, and the cap 95 completely covers the positioning abutment portion 97 of the expansion sleeve 96 and the tuck on the attachment member 99. Hole 100.
  • each of the pointed protrusions 121 on the expansion member 120 is two sharp protrusions 122 and sharp spikes 123 formed by punching and then folding.
  • each of the pointed protrusions 141 on the expansion member 140 is four sharp protrusions 142, sharp spikes 143, sharp spikes 144, and sharp spikes 145 formed by punching and then folding.
  • the driving core member includes a driving core rod 141 and a driving nut 142 that cooperates with the driving core rod 141.
  • the driving core rod 141 includes a small rod 143 provided with a thread, a first driving cone 145 connected to the small rod 143 for driving the expansion of the expansion sleeve 144, and a cylindrical first straight connected to the large end of the first driving cone 145.
  • the light rod portion 146 has a connecting cone 147 with a large end connected to the first straight rod portion 146, a cylindrical second straight rod portion 148 connected to the small end of the connecting cone 147, and a small end connected to the second straight rod portion 148.
  • a second driving cone 149 for driving the expansion sleeve 144 to expand
  • a cylindrical third straight rod portion 150 connected to the large end of the second driving cone 149, disposed at an axial position of the end surface of the third straight rod portion 150, and being expanded in installation Fastening the connection assembly and removing the expansion fastening assembly with the wrench
  • the mating hexagonal blind hole 151 and the six evenly distributed rotation preventing grooves 152 are provided on the end surface of the third straight rod portion 150 and penetrate the circumferential surface of the third straight rod portion 150.
  • the drive nut 142 includes a cylindrical drive nut body 153, and a rotation preventing protrusion 154 disposed at an end surface of the drive nut body 153 and engaging with a coupling slit of the adjacent two-valve expansion member 164 of the expansion sleeve 144 is disposed at the drive nut 142.
  • the axial length of the first optical rod portion 146 is greater than the axial length setting distance of the first driving cone 145, and the axial length of the third straight optical rod portion 150 is greater than the axial length of the first straight optical rod portion 146, and the second driving
  • the axial length of the cone 149 is equal to the axial length of the first drive cone 145.
  • the driving core housing accommodating space in the unexpanded expansion sleeve 144 includes a cylindrical curved surface 156 that is a part of the small rod 143 of the accommodating driving core rod, a first expansion tapered surface 157 that accompanies the first driving cone, and a first straight
  • a cylindrical curved surface 162 of a portion of the third straight rod portion 150 is disposed on the wall of the cylindrical curved surface 156 and a driving nut receiving groove 163 that cooperates with the driving nut 142.
  • the small rod 143 of the driving core rod 141 extends into the threaded hole 155 of the driving nut 142 and is threadedly engaged with the driving nut 142.
  • the axial distance of the end surface of the driving nut 142 to the first driving cone small rod 143 is greater than the driving nut receiving groove 163.
  • the expansion member 164 is hugged outside the driving core rod 141 and the driving nut 142.
  • the driving nut 142 is mounted in the driving nut receiving groove 163.
  • the rotation preventing convex portion 154 of the driving nut 142 extends into the joint seam of the adjacent two-valve expansion member 164. .
  • connection method is different from that of Embodiment 1:
  • the threaded hole 155 of the driving nut 142 is screwed onto the small rod 143 of the driving core rod 141, and the axial distance of the end surface of the driving nut 142 to the first driving cone small rod 143 is larger than the driving nut receiving groove 163 to the first expansion.
  • the three-lobed expansion member is hug on the driving nut 142 and the driving core rod 141, and the driving nut 142 is installed in the nut accommodating groove 163, and the rotation preventing convex portion 154 of the driving nut 142 is extended into the combination of the adjacent two-valve expansion members 164.
  • the expansion member 164 is completely positioned in the gap with the driving nut 142 and the driving core rod 141;

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)

Abstract

L'invention concerne une structure de raccordement et un procédé de raccordement par fixation à expansion, et un ensemble de raccordement par fixation à expansion. La structure de raccordement par fixation à expansion comprend un ensemble de raccordement par fixation à expansion (1), un composant parent (2) et un composant de fixation (3). L'ensemble de raccordement par fixation à expansion (1) comprend une pièce centrale d'entraînement et un manchon d'expansion (7, 75, 96, 144) constitué de pièces d'expansion (6, 60, 120, 140, 164). Une surface conique d'entraînement est prévue sur la pièce centrale d'entraînement. Les périphéries extérieures des corps des pièces d'expansion (6, 60, 120, 140, 164) sont découpées à l'emporte-pièce vers l'extérieur pour former des saillies tranchantes (24), des parties d'extrémité sont également munies de parties de maintien de positionnement (25) et des surfaces coniques (29, 30, 69, 157) pour expansion sont prévues sur des surfaces latérales intérieures. Lorsque le manchon d'expansion (7, 75, 96, 144) est dans un état complètement déployé, les saillies tranchantes (24) sont incorporées dans le composant parent (2). Le composant parent (2) est maintenu dans la direction axiale par l'effet conjoint de la force de frottement statique de serrage et d'expansion entre le manchon d'expansion (7, 75, 96, 144) et un trou circulaire du composant parent (2) et de la force de maintien des saillies tranchantes (24) incorporées dans le composant parent (2), le composant de fixation (3) est maintenu dans la direction axiale par les parties de maintien de positionnement (25), et le manchon d'expansion (7, 75, 96, 144) relie et fixe le composant de fixation (3) au composant parent (2). La structure, le procédé de raccordement et l'ensemble de raccordement permettent à un raccordement d'être plus fiable dans une situation présentant une charge ou des vibrations importantes.
PCT/CN2015/086413 2014-08-08 2015-08-07 Structure de raccordement et procédé de raccordement par fixation à expansion, et ensemble de raccordement par fixation à expansion Ceased WO2016019913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410391222 2014-08-08
CN201410391222.0 2014-08-08

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109487974A (zh) * 2018-11-27 2019-03-19 上海牛元工贸有限公司 瓷砖加固结构和利用加固结构加固瓷砖的方法
CN110145520A (zh) * 2019-06-19 2019-08-20 广州花都区乐思富科技有限公司 一种膨胀连接件
CN110284727A (zh) * 2019-07-03 2019-09-27 广州市第二建筑工程有限公司 一种防止玻化砖空鼓脱落的后处理方法
CN112628260A (zh) * 2020-12-22 2021-04-09 山东颐杰鸿丰能源装备有限公司 多用途带限位快换定位装置
CN115126757A (zh) * 2022-07-14 2022-09-30 贵州贤隆紧固件有限责任公司 一种可拆卸式膨胀螺栓
CN116456653A (zh) * 2023-04-24 2023-07-18 苏州鑫捷顺精密科技股份有限公司 一种带预埋螺套的电子器件盖板

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GB1464004A (en) * 1974-04-11 1977-02-09 Itt Anchor assembly for providing a socket in a wall
CN2082787U (zh) * 1990-06-09 1991-08-14 王道平 膨胀螺钉
CN201851448U (zh) * 2010-10-15 2011-06-01 江苏振亚特种螺钉有限公司 倒茬膨胀螺栓
CN102859208A (zh) * 2010-05-05 2013-01-02 费希尔厂有限责任两合公司 膨胀锚栓

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
GB1464004A (en) * 1974-04-11 1977-02-09 Itt Anchor assembly for providing a socket in a wall
CN2082787U (zh) * 1990-06-09 1991-08-14 王道平 膨胀螺钉
CN102859208A (zh) * 2010-05-05 2013-01-02 费希尔厂有限责任两合公司 膨胀锚栓
CN201851448U (zh) * 2010-10-15 2011-06-01 江苏振亚特种螺钉有限公司 倒茬膨胀螺栓

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109487974A (zh) * 2018-11-27 2019-03-19 上海牛元工贸有限公司 瓷砖加固结构和利用加固结构加固瓷砖的方法
CN109487974B (zh) * 2018-11-27 2024-01-02 上海牛元工贸有限公司 瓷砖加固结构和利用加固结构加固瓷砖的方法
CN110145520A (zh) * 2019-06-19 2019-08-20 广州花都区乐思富科技有限公司 一种膨胀连接件
CN110145520B (zh) * 2019-06-19 2024-04-02 广州花都区乐思富科技有限公司 一种膨胀连接件
CN110284727A (zh) * 2019-07-03 2019-09-27 广州市第二建筑工程有限公司 一种防止玻化砖空鼓脱落的后处理方法
CN112628260A (zh) * 2020-12-22 2021-04-09 山东颐杰鸿丰能源装备有限公司 多用途带限位快换定位装置
CN115126757A (zh) * 2022-07-14 2022-09-30 贵州贤隆紧固件有限责任公司 一种可拆卸式膨胀螺栓
CN116456653A (zh) * 2023-04-24 2023-07-18 苏州鑫捷顺精密科技股份有限公司 一种带预埋螺套的电子器件盖板
CN116456653B (zh) * 2023-04-24 2023-10-24 苏州鑫捷顺精密科技股份有限公司 一种带预埋螺套的电子器件盖板

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