CN220581481U

CN220581481U - Antitheft bolt

Info

Publication number: CN220581481U
Application number: CN202322243220.4U
Authority: CN
Inventors: 龚有义
Original assignee: Wenzhou Zhongyuan Automobile And Motorcycle Standard Parts Co ltd
Current assignee: Wenzhou Zhongyuan Automobile And Motorcycle Standard Parts Co ltd
Priority date: 2023-08-18
Filing date: 2023-08-18
Publication date: 2024-03-12
Anticipated expiration: 2033-08-18

Abstract

The utility model belongs to the technical field of fasteners, and particularly relates to an anti-theft bolt, which comprises: the bolt head is provided with a knife slot; the bolt rod part is provided with threads; further comprises: the annular clamping groove is arranged on the side wall of the bolt head and is concentric with the bolt head; the anti-theft cover can be matched with the annular clamping groove to fix the cover on the head of the bolt so as to shield the knife groove, and can rotate around the shaft; the anti-theft cover is arranged on the bolt head and can rotate around the axis of the bolt head, and compared with the prior art, the anti-theft cover can effectively improve the anti-theft performance of the bolt.

Description

Antitheft bolt

Technical Field

The utility model belongs to the technical field of fasteners, and particularly relates to an anti-theft bolt.

Background

The bolt is a mechanical part, a cylindrical threaded fastener matched with a nut is a fastener formed by a head part and a screw rod (a cylinder with external threads), the cylindrical threaded fastener is matched with the nut and used for fastening and connecting two parts with through holes, as disclosed in the patent with the application number of CN201110376887.0, the bolt belongs to the fastener and comprises a head part, the screw rod formed by downwards extending from the bottom surface of the head part and threads formed on the outer edge of the screw rod, and a lifting groove is formed on the bottom surface of the screw rod.

Disclosure of Invention

The utility model aims to solve the technical problems and provides an anti-theft bolt which has the effect of locking and anti-theft.

In view of this, the present utility model provides an antitheft bolt comprising:

the bolt head is provided with a knife slot;

the bolt rod part is provided with threads;

further comprises:

the annular clamping groove is arranged on the side wall of the bolt head and is concentric with the bolt head;

the anti-theft cover can be matched with the annular clamping groove to fix the cover on the head of the bolt so as to shield the knife groove, and can rotate around the shaft;

the anti-theft cover is arranged on the bolt head and can rotate around the axis of the bolt head.

In the technical scheme, when the bolt is installed, the screw driver is clamped with the cutter groove to screw the head of the bolt and drive the bolt rod to rotate, the threads on the bolt rod are meshed with the corresponding internal threads and gradually screwed along with the rotation, after the bolt is screwed, the anti-theft cover is arranged on the head of the bolt and is clamped and matched with the annular clamping groove, the cutter groove can be shielded after the anti-theft cover is arranged on the head of the bolt, so that a thief is prevented from screwing the bolt, and meanwhile, the anti-theft cover can also rotate around the shaft, so that the thief is further prevented from screwing the bolt through the anti-theft cover to steal.

In the above technical solution, further, the anti-theft cover further includes:

the cover body is provided with a cover groove matched with the head of the bolt;

the telescopic grooves are distributed on the inner wall of the cover groove at equal intervals along the circumferential direction;

the clamping block is movably arranged in the telescopic groove, and a spring is arranged between the clamping block and the telescopic groove;

the clamping block is provided with a round angle at one side facing the head of the bolt, two ends of the spring are respectively fixedly connected with the clamping block and the telescopic groove, and the clamping block can be clamped in the annular clamping groove.

In the above technical solution, further, the method further includes:

the locking teeth are uniformly distributed on the lower surface of the bolt head at intervals along the circumferential direction and used for preventing the bolt head from rotating in the loosening direction.

In the above technical solution, further, the method further includes:

a screw-recessed rib formed of grooves aligned in a length direction of the bolt shank;

wherein the grooves are constructed by collapsing the top of the thread and raising both sides, the shape of one groove of the thread recess rib being different from the shape of the other groove adjacent in the thread circumferential direction of the adjacent thread recess rib in the bolt shank, so that the interference position with the corresponding female thread varies according to the thread engagement with the corresponding female thread.

The beneficial effects of the utility model are as follows:

1. the anti-theft cover is arranged to prevent a thief from twisting the bolt to steal, so that the anti-theft performance of the bolt is effectively improved;

2. after the bolt head is screwed, the locking teeth can be matched with the contact surface to prevent the bolt head from rotating towards the loosening direction, so that the locking effect of the bolt is further improved, and the bolt can be prevented from loosening;

3. the interference position of the screw thread concave rib part and the corresponding internal screw thread is changed according to the screw thread meshing with the corresponding internal screw thread, so that new interference can be generated between the wall part of the matched internal screw thread generated by plastic deformation of one groove and the next groove, thereby preventing looseness between the bolt of the bolt rod part and the matched internal screw thread of the bolt rod part and improving the anti-loosening performance of the bolt.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic diagram of a front view structure of the present utility model.

Fig. 3 is a schematic side view of the present utility model.

Fig. 4 is a partially enlarged view of the portion a of fig. 1 according to the present utility model.

Fig. 5 is a schematic view of the structure of the anti-theft cover of the present utility model.

The label in the figure is:

1-bolt head, 2-knife slot, 3-bolt shank, 4-screw thread, 5-annular clamping slot, 6-anti-theft cover, 60-cover body, 61-cover slot, 62-expansion slot, 63-fixture block, 64-spring, 7-locking tooth, 8-screw thread concave rib and 80-groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. For ease of description, the dimensions of the various features shown in the drawings are not drawn to actual scale. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

Example 1:

the embodiment of the application provides an antitheft bolt, comprising: the bolt head 1, the bolt head 1 is provided with a knife slot 2; a bolt rod part 3, wherein a thread 4 is arranged on the bolt rod part 3;

further comprises: the annular clamping groove 5 is arranged on the side wall of the bolt head 1 and is concentric with the bolt head 1; the anti-theft cover 6 can be matched with the annular clamping groove 5 to fix the cover on the bolt head 1 so as to shield the knife groove 2, and the anti-theft cover 6 can rotate around the shaft;

the bolt head 1 is cylindrical, and the anti-theft cover 6 is arranged on the bolt head 1 in a covering manner and can rotate around the axis of the bolt head 1.

The antitheft cover 6 further includes: a cover 60, the cover 60 is provided with a cover groove 61 matched with the bolt head 1; the telescopic grooves 62 are arranged in a plurality of ways and are uniformly distributed on the inner wall of the cover groove 61 at intervals along the circumferential direction; the clamping block 63 is movably arranged in the telescopic groove 62, and a spring 64 is arranged between the clamping block 63 and the telescopic groove 62;

wherein, the clamping block 63 is rounded towards one side of the bolt head 1, two ends of the spring 64 are fixedly connected with the clamping block 63 and the telescopic groove 62 respectively, and the clamping block 63 can be clamped in the annular clamping groove 5.

The expansion slots 62 have at least four.

Moreover, the axial length of the anti-theft cover 6 is greater than the axial length of the bolt head 1, the axial length of the annular clamping groove 5 is the same as the thickness of the clamping block 63, the radial depth of the annular clamping groove 5 is greater than the extending length of the clamping block 63, movable balls can be mounted on the outer side surface and the upper side surface of the clamping block 63 for reducing friction between the contact surface of the clamping block 63 and the annular clamping groove 5, the cover body 60 is a cylindrical device, the cover groove 61 is also cylindrical, the axial length of the cover groove 61 is equal to the axial length of the bolt head 1, the clamping block 63 can be mounted on the telescopic groove 62 in a radial telescopic manner along the cover groove 61, a guide limiting plate can be mounted at the inner end of the clamping block 63, a guide limiting groove matched with the guide limiting plate can be formed in the cover groove 61, one end of the spring 64 is fixedly connected with the inner end of the clamping block 63, the other end of the spring 64 is fixedly connected with the inner end of the cover groove 61, the side of the clamping block is square, and the side, far away from the bolt head 1 is a plane, so that the anti-theft cover 6 can be matched with the annular clamping groove 5 after being covered on the bolt head 1, and the anti-theft cover 6 can be prevented from being pulled out.

In this embodiment, when the bolt is installed, the screwdriver and the knife slot 2 are clamped and screwed to the bolt head 1 and drive the bolt rod 3 to rotate, the threads on the bolt rod 3 are meshed with the corresponding internal threads and gradually screwed along with the rotation, after the bolt is screwed, the anti-theft cover 6 is covered on the bolt head 1, in the covering process, one side of the clamping block 63 with a rounded corner is contacted with the bolt head 1 and extruded, so that the clamping block 63 moves towards the telescopic slot 62, when the clamping block 63 reaches the annular clamping slot 5, the spring 64 releases and drives the clamping block 63 to extend out, so that the clamping block 63 is clamped into the annular clamping slot 5, the other surface of the clamping block 63 is flat, so that the anti-theft cap can not be pulled out outwards after the clamping block 63 is clamped into the annular clamping slot 5, and the anti-theft cover 6 is covered on the bolt head 1, so that the anti-theft cover 6 can also rotate around the shaft, and theft of the bolt is further prevented by the anti-theft cover 6 through the matching of the annular clamping slot 5 and the clamping block, compared with the prior art, the anti-theft performance of the utility model can be effectively improved.

Example 2:

the present embodiment provides an antitheft bolt, which has the following technical features in addition to the technical scheme including the above embodiment, and further includes: the locking teeth 7 are uniformly distributed on the lower surface of the bolt head 1 at intervals along the circumferential direction and used for preventing the bolt head 1 from rotating in the loosening direction.

The lock tooth 7 is triangular and has one end protruding, and the protruding end of the lock tooth 7 faces the loosening direction of the bolt head 1.

In this embodiment, a plurality of lock teeth 7 make bolt head 1 after screwing, lock teeth 7 can prevent with the contact surface cooperation that bolt head 1 from turning towards not hard up direction to further improved the dead effect of lock of bolt, and can prevent that the bolt from becoming flexible.

Example 3:

the present embodiment provides an antitheft bolt, which has the following technical features in addition to the technical scheme including the above embodiment, and further includes: a screw-recessed rib 8, the screw-recessed rib 8 being constituted by grooves 80 arranged in the longitudinal direction of the bolt shank 3;

wherein the grooves 80 are constituted by collapsing the top of the thread 4 and raising both sides, the shape of one groove 80 of the thread recessed rib 8 is different from the shape of the other groove 80 adjacent in the thread circumferential direction of the adjacent thread recessed rib 8 in the bolt shank 3, so that the interference position with the corresponding internal thread varies according to the thread engagement with the corresponding internal thread.

In the present embodiment, the thread recessed rib 8 is such that its interference position with the corresponding internal thread changes according to the thread engagement with the corresponding internal thread, and therefore, the wall portion of the mating internal thread generated by plastically deforming one groove 80 can generate new interference with the next groove 80, so that it is possible to achieve prevention of looseness between the bolt of the bolt shank 3 and the mating internal thread thereof, and the looseness preventing performance of the bolt is improved.

The embodiments of the present application and the features of the embodiments may be combined without conflict, and the present application is not limited to the specific embodiments described above, which are merely illustrative, not restrictive, and many forms may be made by those of ordinary skill in the art, without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims

1. An antitheft bolt comprising:

a bolt head (1), wherein a knife slot (2) is arranged on the bolt head (1);

a bolt rod part (3), wherein threads (4) are arranged on the bolt rod part (3);

characterized by further comprising:

the annular clamping groove (5) is formed in the side wall of the bolt head (1) and is concentric with the bolt head (1);

the anti-theft cover (6) can be matched with the annular clamping groove (5) to fix the cover on the bolt head (1) so as to shield the knife groove (2), and the anti-theft cover (6) can rotate around the shaft;

further comprises:

a screw recessed rib (8), wherein the screw recessed rib (8) is composed of grooves (80) arranged in the length direction of the bolt shank (3);

the anti-theft cover (6) is arranged on the bolt head (1) in a covering mode and can rotate around the axis of the bolt head (1), the groove (80) is formed by collapsing the top of the thread (4) and enabling two sides to be erected, the shape of one groove (80) of the thread concave rib (8) is different from the shape of the other groove (80) adjacent to the thread circumference of the adjacent thread concave rib (8) in the bolt rod (3), and accordingly the interference position of the corresponding internal thread is changed according to the thread engagement with the corresponding internal thread.

2. An anti-theft bolt according to claim 1, characterized in that the anti-theft cover (6) further comprises:

a cover body (60), wherein a cover groove (61) matched with the bolt head (1) is arranged on the cover body (60);

the telescopic grooves (62) are formed in a plurality of ways and are uniformly distributed on the inner wall of the cover groove (61) at intervals along the circumferential direction;

the clamping block (63) is movably arranged in the telescopic groove (62), and a spring (64) is arranged between the clamping block (63) and the telescopic groove (62);

the clamping block (63) is provided with a round angle towards one side of the bolt head (1), two ends of the spring (64) are respectively fixedly connected with the clamping block (63) and the telescopic groove (62), and the clamping block (63) can be clamped in the annular clamping groove (5).

3. The antitheft bolt of claim 2, further comprising:

the locking teeth (7) are uniformly distributed on the lower surface of the bolt head (1) at intervals along the circumferential direction and used for preventing the bolt head (1) from rotating in the loosening direction.

4. An antitheft bolt according to claim 2, characterized in that: the expansion groove (62) has at least four.