CN114876937A - Nut, locknut structure and locking thread pair thereof - Google Patents
Nut, locknut structure and locking thread pair thereof Download PDFInfo
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- CN114876937A CN114876937A CN202210496641.5A CN202210496641A CN114876937A CN 114876937 A CN114876937 A CN 114876937A CN 202210496641 A CN202210496641 A CN 202210496641A CN 114876937 A CN114876937 A CN 114876937A
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- nut
- bolt
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- auxiliary
- locknut
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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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts
- F16B39/122—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts foreseen with mating surfaces inclined, i.e. not normal, to the bolt axis
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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
- F16B37/00—Nuts or like thread-engaging members
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
本发明公开一种螺母、其防松螺母结构及防松螺纹副。所述一种螺母(1)特征在于：所述螺母(1)的圆环平面(12)上设有固定的凸点(8)，其高度为一种螺母(1)内螺纹(6)牙距的1/10～1倍，其横截面为任意形状的。所述防松螺母结构(11)，主螺母(2)与辅螺母(3)对顶拧在螺杆(5)上，特征在于：主螺母(2)或辅螺母(3)任一为一种螺母(1)，且凸点(8)位于主螺母(2)与辅螺母(3)之间。所述防松螺纹副(13)特征在于：螺栓(4)固定端(10)为防松螺母结构(11)，凸点(8)使辅螺母(3)内螺纹(6)的面与螺栓(4)外螺纹(7)的面掉斜、咬死、防松。克服了现有技术螺杆(5)弯曲易损，不能重复使用的缺点，用于振动设备、设施的紧固防松。
The invention discloses a nut, its anti-loose nut structure and anti-loose thread pair. The nut (1) is characterized in that: the annular plane (12) of the nut (1) is provided with a fixed convex point (8), the height of which is equal to the inner thread (6) of the nut (1). 1/10 to 1 times the distance, and its cross-section is of any shape. In the anti-loosening nut structure (11), the main nut (2) and the auxiliary nut (3) are screwed on the screw rod (5) against the top, characterized in that either the main nut (2) or the auxiliary nut (3) is one kind The nut (1), and the convex point (8) is located between the main nut (2) and the auxiliary nut (3). The anti-loosening thread pair (13) is characterized in that: the fixed end (10) of the bolt (4) is a locking nut structure (11), and the convex point (8) makes the surface of the inner thread (6) of the auxiliary nut (3) meet the bolt (4) The surface of the external thread (7) is inclined, seized, and prevented from loosening. It overcomes the shortcomings of the prior art that the screw (5) is easy to bend and cannot be reused, and is used for tightening and preventing loosening of vibration equipment and facilities.
Description
Technical Field
The invention relates to the field of anti-loose fasteners, in particular to a nut, an anti-loose nut structure and an anti-loose thread pair.
Background
The existing double-nut friction anti-loosening structure is characterized in that two nuts with the same rotation direction are abutted to outer threads of the same bolt and are twisted to generate abutting force between the two nuts, so that a main nut and a spring pad at the bottom generate friction and generate friction with an auxiliary nut on the upper surface, the double friction achieves the pre-tightening effect, and the phenomenon of loosening can still occur after violent vibration.
For this reason, prior art CN204493402U provides a locknut structure, which includes a flat nut and a slanting nut. One end face of the inclined nut is an inclined face, an included angle is formed between the inclined face and a vertical line of a thread hole axis of the inclined nut, the flat nut and the inclined nut are sequentially installed on the bolt, and the matching contact faces of the two nuts comprise the inclined face and are sequentially screwed down. The inclined plane is not perpendicular to the axis of the bolt, the upper part of the inclined plane generates a certain bending moment to the bolt, and the anti-loosening effect is enhanced by the bending moment. This case has the following disadvantages: 1. because the main nut and the auxiliary nut, one is a flat nut and the other is an inclined nut, after the main nut and the auxiliary nut are pre-tightened on the same bolt, the contact plane and the inclined plane are in overall contact, and the situation that a screw rod of the bolt is bent to one side at the overall contact surface cannot be avoided; 2. the bolt is bent, so that the bolt can be used only once and cannot be reused; 3. because the bolt is deformed and bent by the screwed thread between the two nuts, the nut with the downward bent part cannot be disassembled, and the nut can be used only once; 4. the bevel nut is complicated in bevel processing by a die or a cutting means, and is high in cost because materials are wasted; 5. because the screw rod of the bolt is bent, the yield strength and the tensile strength of the bolt are greatly reduced, and the bolt can be subjected to yield fracture from the bent part of the screw rod during severe vibration; 6. because the respective shafts of the flat nut and the inclined nut are respectively coaxial with the bolt shaft of the section pre-tightened by the flat nut and the inclined nut, namely, each thread tooth of the flat nut and each thread tooth of the inclined nut are respectively parallel to the thread tooth surface of the bolt of the section to be screwed, one surface of each thread tooth is contacted and stretched, the axis of the nut and the axis of the bolt are coaxial, and when the nut vibrates on the screw and freely moves, the nut easily vibrates, rotates back and loosens on the outer thread of the screw without friction force.
Disclosure of Invention
In order to overcome the defects of the prior art, the proposal aims to provide a nut, a locknut structure and a lockthread pair thereof, which have reliable locknut and low cost and can be repeatedly used.
The present case a nut, including ordinary nut, or lock nut, the periphery is hexagon, or square, and there is the round hole in the center, and the inboard of round hole is threaded, and the screw hole axle is coaxial with the bolt axle, the ring plane at nut both ends with the screw hole axle is perpendicular, its characterized in that:
the common nut or the circular ring plane at one end of the locknut is provided with a fixed salient point;
the salient points and the common nut or the locknut are homogeneous and fixed into a whole.
Furthermore, the height of the salient point is at least 1/10-1 times of the thread pitch of the internal thread of the screw hole of the common nut or the locknut; the radial length of the bottom area of the salient points is not less than 1/2 times of the pitch of the internal threads.
Further, the cross section of the salient point perpendicular to the height thereof is of an arbitrary shape.
Further, the cross section of the salient point, which is perpendicular to the height of the salient point, is in any shape of circle, ellipse, rectangle, trapezoid, triangle or prism.
Further, the convex points are fixedly connected with the plane of the circular ring, or the convex points are formed by cold heading with a common nut or a die integrated with a locknut; or welded as one; or are bonded into a whole by glue; or the circular ring plane at one end of the nut is drilled and assembled with the small screw into a whole through the inner screw thread.
Furthermore, the common nut is a fixing tool, the center of the common nut is provided with a hole, the inner side of the hole is provided with threads, the periphery of the hole is provided with symmetrical regular hexagonal edges or square edges, the regular hexagonal edges or the square edges are in threaded connection with external threads of bolts with the same specification through the threads on the inner side of the round hole, a fastened piece A and a fastened piece B are fastened between the bolt head and the common nut in a threaded mode, and the two ends of the common nut are provided with circular ring planes which are parallel to each other and perpendicular to a screw hole axis.
Furthermore, the locknut comprises a nut body and an annular elastic locking sheet, wherein the annular elastic locking sheet is arranged at the upper end of the nut body and is of an integral structure with the nut body, and the annular elastic locking sheet is bent towards the inner side of the screw thread of the nut body and forms an annular channel with the nut body; the inner diameter of the annular elastic locking piece is smaller than that of the internal thread part of the nut body, or the annular elastic locking piece and the internal thread part of the nut body are slightly staggered axially or radially.
Furthermore, the internal thread of the screw hole of the common nut is provided with a coating, and the coating is coated with rubber or non-setting adhesive substances and is used for increasing the friction force between the nut and the bolt.
The nut has a better anti-loosening effect if matched with the existing anti-loosening nut, and is mainly used for preventing loosening; when the nut is in a free loosening state, the nut is prevented from moving freely by the conventional anti-loosening nut, the nut is temporarily fixed, and the nut is waited for the next period of vibration fastening, so that the anti-loosening effect is better!
The locknut structure comprises
A main nut for screwing the fixed end of the bolt,
the auxiliary nut is screwed on the fixed end of the bolt and positioned outside the main nut,
the external thread of the screw rod of the bolt is used for coaxially screwing the internal thread of the main nut and the auxiliary nut,
the method is characterized in that:
one of the main nut and the auxiliary nut is a common nut, or the other one of the locknut and the auxiliary nut is the nut;
when the nut is a main nut, the salient points of the nut are fixed on the circular plane at one end of the main nut, and the top points of the salient points are in contact with the spiral point of the circular plane at one end of the auxiliary nut screwed on the bolt;
when the nut is an auxiliary nut, the salient point of the nut is fixed on the circular plane at one end of the auxiliary nut, and the vertex of the salient point is in contact with the spiral point of the circular plane at one end of the main nut screwed on the bolt;
when the peak of the convex point on one nut is in contact with the circular plane spiral point at one end of the other nut, the main nut utilizes the gap between the auxiliary nut internal thread and the bolt external thread to enable the auxiliary nut internal thread surface and the bolt external thread surface to be inclined due to the effect of the peak of the convex point on one nut, the auxiliary nut is clamped by rotating in a one-way mode in the loosening direction, the peak of the convex point blocks the main nut, the main nut can only be screwed and cannot be loosened, and the effect of stopping and loosening is achieved;
or the main nut and the auxiliary nut are twisted together with a certain pretightening force, and the main nut and the auxiliary nut are engaged tightly in a bidirectional spiral manner by the locknut structure and fixed on the screw rod of the bolt, so that the locknut structure is formed.
The anti-loosening thread pair comprises
One end of the bolt is a bolt head, and the other end of the bolt is a fixed end;
the locknut structure is arranged at the fixed end of the bolt;
a fastened piece A and a fastened piece B are mounted and fastened between the bolt head and the locknut structure;
in some modes, a main flat washer or a main elastic washer is respectively arranged between the locknut structure and the fastened piece A, and the main flat washer is positioned between the main elastic washer and the fastened piece A;
in some modes, no main flat washer or no main elastic washer is arranged between the locknut structure and the fastened piece A.
The anti-loosening principle of the invention is as follows: improvement on the basis of ordinary two nuts to the top screw, at any point of the ring plane contact surface between ordinary two nuts, utilize the clearance between auxiliary nut internal thread and the bolt external screw thread, make auxiliary nut internal thread face and bolt external thread face, originally two flanks of parallel spiral meshing fall to one side, cross for the mutual slope, pry each other, the effect of spiral lateral force, the pine moves back the direction and stings, tensile, make the frictional force between auxiliary nut internal thread and the bolt external thread face increase suddenly, thereby make the bump is the fixed point for the bolt, can not the rotating, when main nut moves back, the auxiliary nut is withstood to the bump, has increased the lateral force of auxiliary nut more, reaches locking purpose, thereby makes main nut screw tighten, and can not be to the direction rotating of pine. If the main nut and the auxiliary nut are twisted on the screw rod of the bolt, the main nut, the auxiliary nut and the bolt are coaxially, tightly and firmly bound into a whole, and the bolt cannot rotate backwards.
Only after the auxiliary nut is loosened by tools such as a spanner, the salient point can be far away from the main nut or the auxiliary nut, the main nut can be loosened again, the bolt can be disassembled finally, the bolt is drawn out from the screw hole of the fastened piece, and the auxiliary nut can be repeatedly disassembled, assembled and disassembled for use.
In summary, the nut, the locknut structure and the lockthread pair thereof have the following advantages:
1. the invention is based on the existing fastener, and has strong universality;
2. the anti-loosening nut structure comprises three or more parts, can be used upside down on the screw rod, and can meet the actual requirement;
3. the scheme has the advantages of simple structure, convenience in processing and production and low cost;
4. the scheme is convenient to install and operate, and does not need special tools;
5. the anti-loosening performance is good, when the auxiliary nut is fastened, the main nut can only be tightened but not loosened, and the main nut does not loosen slightly after vibration;
6. compared with the most similar prior art CN204493402U, the anti-loose structure and the principle of the scheme are completely different from the anti-loose structure principle, the using effect and the processing technology of the anti-loose structure and the principle of the auxiliary nut in the prior art, the auxiliary nut, the main nut and the bolt are still the same axis after being installed, the upper circular ring plane of the main nut and the lower circular ring plane of the auxiliary nut are not in direct contact but form an angle with each other, after being fully pre-tightened, the anti-loose structure and the principle are gapped, and the tops of the salient points are in direct contact. When the bolt bears the pre-tightening tension, a small amount of lateral force is borne, the main nut, the auxiliary nut and the bolt are fixed into a whole, a shaft of the bolt is not bent after the bolt is used, the yield strength and the tensile strength are not influenced, after the bolt is pre-tightened, the main nut, the auxiliary nut and the bolt are relatively fastened into a whole, and the bolt cannot loosen at all, so that the anti-loosening reliability is high, all original accessories are not damaged in the use process, the anti-loosening nut is easy to disassemble and can be repeatedly used, the structure is simple, the processing technology is simple, only one welding spot is provided, and the processing cost is very low.
Drawings
FIG. 1 is one of the front views of a nut of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a view of the installation of FIG. 1 in a locking thread pair;
FIG. 4 is another installation configuration of FIG. 1 in a locking thread pair;
FIG. 5 is a second top oblique view of a nut of the present invention;
FIG. 6 is a schematic sectional view A-A of FIG. 5;
FIG. 7 is a bottom view of FIG. 5;
fig. 8 is a view showing the installation structure of fig. 5 in the locking screw pair.
In the figure:
1. a kind of nut; 2, a main nut; 3, auxiliary nuts;
4. a bolt; 5, a screw rod; 6, internal threads;
7. an external thread; 8, salient points; bolt head 9;
10. a fixed end; 11, a locknut structure; a circular ring plane;
13. a locking thread pair; 14, screw holes; 15, one end of the nut;
16. a nut body; an annular channel; 18, an annular elastic locking sheet;
19. strip-shaped notches; concave indentation; a locknut;
22. a fastened piece A; a fastened piece B; apex of bump 24;
25. a common nut; 26, combining limit steps; a primary flat washer;
28. a primary spring washer; 29, coating; a hexagonal side;
31. the other end of the nut; a gap between the main nut and the auxiliary nut;
33. a gap between the internal thread of the auxiliary nut and the external thread of the screw rod; disc spring washer 34.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and examples:
the nut 1 can be applied to various opposite-top anti-loose nut structures 11 and anti-loose thread pairs 13.
In fig. 1 to 8, a nut 1 includes a conventional common nut 25, or a nut mold with a cavity cold heading process is used on a circular ring plane 12 at one end of a conventional locknut 21, and salient points 8 are pressed on the circular ring plane 12 at one end of the conventional locknut 21 or the conventional common nut 25; or welding fixed salient points 8 on the circular ring plane 12 by using welding wires or welding rods made of the same material; or the salient points 8 are fixed on the circular ring plane 12 by gluing; or a hole is drilled on the annular plane 12 at one end of the nut, and the salient point 8 is assembled and fixed by an inner screw thread and a small screw. The height of the salient points 8 on the circular ring plane 12 is at least 1/10-1 times of the pitch of the internal thread 6 of the screw hole 14 of the existing common nut 25 or the existing locknut 21; the cross section of the salient point 8 perpendicular to the height is of any shape, the radial length of the area is not less than 1/2 times of the pitch of the internal thread 6, or the cross section is circular, or elliptical, or rectangular, or trapezoidal, or triangular, or prismatic.
A nut 1 has a coating 29 on its internal thread 6, the coating 29 is made of rubber or non-drying adhesive material, and is used to increase the friction between nut and bolt and prevent the auxiliary nut 3 from loosening freely when vibrating.
In fig. 5 to 8, the conventional locknut 21 includes a nut body 16 and an annular elastic locking piece 18, wherein the annular elastic locking piece 18 is arranged at the upper end of the nut body 16 and is integrated with the nut body 16; the annular elastic locking piece 18 is bent towards the inner side of the thread of the nut body 16 and forms an annular channel 17 with the nut body 16; the inner diameter of the annular elastic locking piece 18 is smaller than the inner diameter of the threaded part of the nut body 16, or the annular elastic locking piece 18 and the threaded part of the nut body 16 are slightly axially or radially staggered. The limit step combination 26 consists of more than one semicircular step; the strip-shaped cut 19 or the concave indentation 20 is provided with more than 1.
In fig. 3, the anti-loose nut structure 11 of the present invention is formed by screwing the internal threads 6 of the main nut 2 and the auxiliary nut 3 on the external threads 7 of the screw 5 in opposite directions, the two nuts can exchange two nut positions, and the salient point 8 is located between the main nut 2 and the auxiliary nut 1. The anti-loose thread pair 13 comprises a bolt 4, a nut anti-loose structure 11, a main flat cushion figure 27 or a main elastic washer 28, wherein a convex point 8 is arranged on a circular ring plane 12 at the lower end of an auxiliary nut 3 to form the nut 1 of the invention, a fixed end 10 of the bolt 4 is inserted into a fastened piece B23, a fastened piece A22, a main flat washer 27, a main elastic washer 28 and a screw hole 14 of a main nut 2 and is screwed up according to preset torque, the auxiliary nut 3 is screwed up on an exposed external thread 7 of the bolt 4, the auxiliary nut 3 is the nut 1 with the convex point 8 of the invention, when a convex point 24 of the convex point 8 on the circular ring plane 12 at one end of the auxiliary nut 3 is contacted with the circular ring plane 12 on the main nut 2, a certain pre-tightening torque is applied to ensure that an internal thread of the nut 1 formed by the main nut 2 and the auxiliary nut 3 with the convex point 8 is fixed on the external thread 7 of the bolt 4 tightly, the bolt 4, the main nut 2, the auxiliary nut 3, the main flat washer 27, the main elastic washer 28, the fastened member 22 and the fastened member 23 are firmly fastened together. After main nut 2, supplementary nut 3 pretension respectively, owing to the effect of separating of adding of bump 8, utilize the clearance 33 of assisting between 3 internal threads 6 of nut and the 4 external threads 7 of bolt, make and assist 3 internal threads 6 of nut and fall to one side on the external threads 7 of screw rod 5, and main nut 2 can just not contact with the nut body 16 of assisting nut 3 and gapped, make and assist nut 3 and fall to one side fully, lock and die on the external threads 7 of screw rod 5, can not retreat and turn.
In fig. 4, the main nut 2 is a nut 1 according to the present invention, the auxiliary nut 3 is a normal nut 25, the protruding points 8 are disposed between the main nut 2 and the auxiliary nut 3 and integrated with the main nut 2, the auxiliary nut 3 or the internal threads 6 are provided with a coating 29 for preventing the auxiliary nut 3 from loosening freely, and other structures have the same principle as that described in fig. 3.
In fig. 8, the nut body 16 of the auxiliary nut 3 is one of the existing locknuts 21, the circular ring plane 12 at the lower end of the auxiliary nut 3 is provided with the salient points 8, so as to form the nut 1 of the present invention, the locknut 21 of the auxiliary nut 3 is used for preventing the auxiliary nut 3 from being loosened freely, and other installation structures and principles are the same as those in fig. 3 and are not repeated.
A main flat washer 27 or a main elastic washer 28 is respectively arranged between the locknut structure 11 and the fastened piece A22, and the main flat washer 27 is positioned between the main elastic washer 28 and the fastened piece A22; or no gasket is arranged; the main elastic washer 28 is either an existing open circular spring washer, an existing conical disc-shaped elastic washer, an existing spherical disc-shaped elastic washer or any one of the existing elastic washers.
The main elastic washer 28, the main flat washer 27, the common nut 25, the locknut 21 and the bolt 4 are all the existing mature technologies, and the structure, the working principle, the material, the specification and the selecting method thereof should be mastered by the ordinary technicians in the field, and the description thereof will not be repeated here.
The three mounting modes respectively correspond to different nut thicknesses, thread arrangement modes, different materials and different specifications, the main nut 2 and the auxiliary nut 3, namely the nut with the salient points 8 or the existing nut, and the three mounting modes are mounted to achieve the same anti-loosening purpose, but only one salient point 8 is designed on the upper annular plane 12 of the main nut 2; one is designed on the lower annular flat 12 of the auxiliary nut 3 and functions as such.
Experiments prove that: when the main nut 2 is retreated, the auxiliary nut 3 is spirally and obliquely arranged on the external thread 7 of the screw rod 5 of the bolt 4 through the convex point 8, the main nut 2 and the auxiliary nut 3 are bidirectionally locked if the main nut 2 and the auxiliary nut 3 are screwed down by using a certain torque with variable or small magnitude, and the auxiliary nut 3 and the main nut 2 cannot be loosened.
The nut 1 is formed by fixing a convex point 8 on a circular plane 12 at one end of an existing common nut 25 or an existing locknut 21, the convex point 8 is made of stainless steel, carbon steel, manganese steel, alloy steel, iron, copper and other metals which are the same as the nut, and the nut, locknut structure and lockthread pair formed by the convex point 8 are used in the vibration locking and fastening fields of railways, bridges, mines, aviation, aerospace, navigation, iron towers, wind power, nuclear power, vehicles, vibration machines, facilities and the like.
The nut can be simply called as a 'screw nut with a point' for convenience and intuition, is more definite and clear, can be distinguished from other nuts, and is convenient for communication.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; although the present disclosure has been described in detail with reference to preferred embodiments, those skilled in the art will appreciate that; modifications to the embodiments of the present disclosure, or equivalent substitutions for some features, may be made without departing from the spirit of the present disclosure, which should be considered to be within the scope of the claims.
Claims (10)
1. A nut comprises a common nut (25) or a locknut (21), wherein the periphery of the common nut is hexagonal or square, a round hole is arranged in the center of the common nut, threads are arranged on the inner side of the round hole, a bolt shaft is coaxial with the round hole, and circular ring planes (12) at two ends of the nut are perpendicular to the bolt shaft, and the nut is characterized in that:
a fixed salient point (8) is arranged on the circular ring plane (12) at one end (15) of the common nut (25) or the locknut (21);
the salient points (8) and the common nut (25) or the locknut (21) are homogeneous and fixed into a whole.
2. A nut as defined in claim 1, wherein: the height of the salient point (8) is at least 1/10-1 times of the pitch of the internal thread (6) in the screw hole (14) of the common nut (25) or the locknut (21); the radial length of the bottom area of the salient point (8) is not less than 1/2 times of the pitch of the internal thread (6).
3. A nut as defined in claim 1, wherein: the cross section of the salient point (8) perpendicular to the height of the salient point is of any shape.
4. A nut as defined in claim 3, wherein: the cross section of the salient point (8) perpendicular to the height thereof is in any shape of circle, ellipse, rectangle, trapezoid, triangle or prism.
5. A nut as defined in claims 1-4, wherein: the salient points (8) are fixedly connected with the circular ring plane (12), or are formed by cold heading with a common nut (25) or a die integrated with a locknut (21); or welded as one; or are bonded into a whole by glue; or a circular ring plane (12) at one end of the nut is drilled and is assembled with the small screw into a whole through the inner screw thread.
6. A nut as defined in claim 1, wherein: the common nut (25) is a fixing tool, the center of the common nut is provided with a hole, the inner side of the hole is provided with threads, the periphery of the common nut is provided with symmetrical regular hexagonal edges or square edges, the regular hexagonal edges or the square edges are connected with the external threads (7) of the bolts (4) with the same specification in a threaded mode through the internal threads (6) of the round holes, the bolt head (9) and the common nut (25) are fastened by a first fastening piece (22) and a second fastening piece (23) in a threaded mode, and the two ends of the common nut are provided with annular planes (12) which are parallel to each other and perpendicular to the axis of the screw hole (14).
7. A nut as defined in claim 1, wherein: the anti-loose nut (21) comprises a nut body (16) and an annular elastic locking sheet (18), the annular elastic locking sheet (18) is arranged at the other end (31) of the nut body (16) and is of an integrated structure with the nut body (16), the annular elastic locking sheet (18) is bent towards the inner side of the screw thread of the nut body (16) and forms an annular channel (17) with the nut body (16); the inner diameter of the annular elastic locking piece (18) is smaller than the inner diameter of the internal thread (6) part of the nut body (16), or the annular elastic locking piece (18) and the internal thread (6) part of the nut body (16) are slightly dislocated in the axial direction or the radial direction.
8. A nut as defined in claim 1, wherein: the internal thread (6) of the screw hole (14) of the common nut (25) is provided with a coating (29), and the coating (29) is coated with rubber or non-drying adhesive substances.
9. The locknut structure comprises
A main nut (2) for screwing the fixed end (10) of the bolt (4),
an auxiliary nut (3) which is used for being screwed at the fixed end of the bolt (4) and is positioned at the outer side of the main nut (2), an external thread (7) of a screw rod (5) of the bolt (4) is used for coaxially screwing the main nut (2) and an internal thread (6) of the auxiliary nut (3),
the method is characterized in that:
one of the main nut (2) and the auxiliary nut (3) is a common nut (25) or a locknut (21), and the other one is a nut (1);
when the nut (1) is a main nut (2), the salient points (8) of the nut are fixed on the circular plane (12) at one end of the main nut (2), and the vertexes (24) of the salient points (8) are in spiral point contact with the circular plane (12) at one end of the auxiliary nut (3) screwed on the bolt (4);
when the nut (1) is an auxiliary nut (3), the salient points (8) of the nut are fixed on the circular plane (12) at one end of the auxiliary nut (3), and the vertexes (24) of the salient points (8) are in spiral point contact with the circular plane (12) at one end of the main nut (2) screwed on the bolt (4);
when the vertex (24) of the salient point (8) on the nut (1) is in spiral point contact with the circular ring plane (12) at one end of the other nut, the main nut (2) enables the surface of the internal thread (6) of the auxiliary nut (3) and the surface of the external thread (7) of the bolt (4) to fall off obliquely by utilizing the gap (33) between the internal thread (6) of the auxiliary nut (3) and the external thread (7) of the bolt (4) under the action of the vertex (24) of the salient point on the nut (1), the auxiliary nut (3) is bitten in a one-way rotation mode in the loosening direction, and the vertex (24) of the salient point blocks the main nut (2), so that the main nut (2) can only be screwed and cannot be loosened, and the effects of stopping and loosening prevention are achieved;
or the main nut (2) and the auxiliary nut (3) are twisted together with a certain pretightening force, and the main nut (2) and the auxiliary nut (3) are clamped by the locknut structure (11) in a bidirectional spiral manner and fixed on the screw rod (5) of the bolt (4).
10. The locking thread pair comprises
One end of the bolt (4) is a bolt head (9), and the other end of the bolt is a fixed end (10); the locknut structure (11) is arranged at the fixed end (10) of the bolt (4); a fastened piece A (22) and a fastened piece B (23) are installed and fastened between the bolt head (9) and the locknut structure (11);
a main flat washer (27) or a main elastic washer (28) is respectively arranged between the locknut structure (11) and the fastened piece A (22), and the main flat washer (27) is positioned between the main elastic washer (28) and the fastened piece A (22);
no washer is arranged between the locknut structure (11) and the fastened piece A (22);
the main elastic washer (28) is an open circular spring washer, or a conical disc-shaped elastic washer, or a spherical disc-shaped elastic washer (34), or any elastic washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210496641.5A CN114876937A (en) | 2022-04-28 | 2022-04-28 | Nut, locknut structure and locking thread pair thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210496641.5A CN114876937A (en) | 2022-04-28 | 2022-04-28 | Nut, locknut structure and locking thread pair thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN114876937A true CN114876937A (en) | 2022-08-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210496641.5A Pending CN114876937A (en) | 2022-04-28 | 2022-04-28 | Nut, locknut structure and locking thread pair thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115773305A (en) * | 2022-11-23 | 2023-03-10 | 杨富云 | Spotted nut, anti-loosening structure, anti-loosening thread pair and efficiency improving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115773305A (en) * | 2022-11-23 | 2023-03-10 | 杨富云 | Spotted nut, anti-loosening structure, anti-loosening thread pair and efficiency improving method thereof |
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