Anti-theft and anti-loosening bolt

Abstract

The utility model relates to bolt technical field, concretely is a kind of anti-theft and anti-loose bolt, including threaded rod, tooth pattern sets two different bevel angles, effectively play the role of relaxation, locking point design is theft-proof head type, its top end fixedly connected with fixed head, the top end of fixed head is provided with movable head, and butt joint mechanism is arranged between movable head and the fixed head;Plug head, its bottom end is provided with driving mechanism, and driving mechanism is used in cooperation with butt joint mechanism;Nut, its threaded connection is in the axial exterior of threaded rod, the lower portion of nut is provided with limiting mechanism.The utility model cooperates using movable head, insertion rod, slot and spring, so that movable head and fixed head are in the idle state of separation under non-operating state, effectively solve the problem that existing anti-theft bolt can be clamped and driven thread part by general tool because driving part and thread part are fixedly connected.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, specifically to a bolt that is anti-theft and anti-loosening. Background Technology

[0002] A bolt is a mechanical part consisting of a head and a shank (a cylinder with external threads). It is a cylindrical threaded fastener that is used with a nut.

[0003] In existing technologies, anti-theft bolts typically employ irregular head structures such as internal pentagons or Torx grooves to increase the difficulty of disassembly with common tools. However, the driving part (i.e., bolt head) and threaded part of anti-theft bolts are usually an integral or fixedly connected structure. This structure means that the driving part (such as the outer periphery or internal irregular groove of a hexagonal or dodecagonal head) can still be disassembled illegally by cutting a force-bearing plane on its outer periphery that is compatible with common tools (such as wrenches or pipe wrenches), thus easily breaking through its anti-theft security. Utility Model Content

[0004] The purpose of this invention is to provide a theft-proof and anti-loosening bolt to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A type of anti-theft and anti-loosening bolt, including

[0007] A threaded rod has a fixed head fixedly connected to its top end, and a movable head is provided at the top end of the fixed head. A docking mechanism is provided between the movable head and the fixed head.

[0008] The bolt head has a drive mechanism at its bottom end, which works in conjunction with the docking mechanism.

[0009] A nut, which is threadedly connected to the axial outside of a threaded rod, and a limit mechanism is provided below the nut.

[0010] Preferably, the docking mechanism includes a circular groove at the center of the top of the fixed head and fan-shaped grooves evenly distributed on the outer side of the circumference of the circular groove. A matching fan-shaped head is slidably connected in the fan-shaped groove. A spring is provided between the fan-shaped groove and the fan-shaped head. The two ends of the spring are fixedly connected to the inner bottom wall of the fan-shaped groove and the lower end face of the fan-shaped head, respectively. A plug is fixedly connected to the center of the bottom end of the fan-shaped head. A slot matching the plug is provided in the inner bottom wall of the fan-shaped groove.

[0011] Preferably, the bottom center of the movable head is rotatably connected to the top center of the fixed head via a bearing, and positioning marks are fixedly connected to one side of both the fixed head and the movable head.

[0012] Preferably, the driving mechanism includes a disassembly head fixedly connected to the bottom end of the plug head, and a plurality of sector blocks fixedly connected at equal intervals to the lower end face of the disassembly head, wherein the sector blocks match the sector slots;

[0013] Preferably, the shape of the plug head is any one of hexagonal, dodecagonal, or square;

[0014] Preferably, the limiting mechanism includes a plurality of vertical grooves evenly distributed on the threaded rod, and a plurality of positioning holes evenly distributed in the vertical grooves along the length of the threaded rod. A rubber washer is movably sleeved on the outside of the threaded rod and below the nut. A positioning ring is movably sleeved on the outside of the threaded rod and below the rubber washer. Both ends of the positioning ring are threadedly connected to a plurality of positioning screws that match the positioning holes.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This anti-theft and anti-loosening bolt, through the cooperation of the movable head, the insertion rod, the slot and the spring, makes the movable head and the fixed head separate and rotate freely when not in operation, which effectively solves the problem that the existing anti-theft bolts can be clamped and driven by general tools because the driving part and the threaded part are fixedly connected.

[0017] 2. This anti-theft and anti-loosening bolt, through the combined use of a positioning ring, positioning screw, positioning hole and rubber washer, achieves mechanical locking and continuous elastic tightening of the nut, solving the problem of conventional bolts easily rotating and loosening under vibration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall main structure of this utility model;

[0019] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0020] Figure 3 For the present utility model Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 For the present utility model Figure 1 Enlarged diagram of point B in the middle.

[0022] In the diagram: 1. Threaded rod; 2. Fixed head; 3. Moving head; 4. Bolt head; 5. Nut; 6. Circular groove; 7. Sector groove; 8. Sector head; 9. Spring; 10. Insert rod; 11. Slot; 12. Positioning mark; 13. Disassembly head; 14. Sector block; 15. Vertical groove; 16. Positioning hole; 17. Rubber washer; 18. Positioning ring; 19. Positioning screw. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-4 As shown, this utility model provides a technical solution:

[0025] An anti-theft and anti-loosening bolt includes a threaded rod 1, with a fixed head 2 fixedly connected to its top. A movable head 3 is located at the top of the fixed head 2. A docking mechanism is provided between the movable head 3 and the fixed head 2. The docking mechanism includes a circular groove 6 located in the middle of the top of the fixed head 2, and fan-shaped grooves 7 evenly distributed on the outer circumference of the circular groove 6. A matching fan-shaped head 8 is slidably connected to the fan-shaped groove 7. A spring 9 is provided between the fan-shaped groove 7 and the fan-shaped head 8. The two ends of the spring 9 are fixedly connected to the inner bottom wall of the fan-shaped groove 7 and the lower end face of the fan-shaped head 8, respectively. A plug rod 10 is fixedly connected to the middle of the bottom end of the fan-shaped head 8. A slot 11 matching the plug rod 10 is provided in the inner bottom wall of the fan-shaped groove 7. The middle of the bottom end of the movable head 3 is rotatably connected to the middle of the top of the fixed head 2 via a bearing. Positioning marks 12 are fixedly connected to the outer side of both the fixed head 2 and the movable head 3. A bolt head 4 is provided at its bottom end. There is a drive mechanism that works in conjunction with the docking mechanism. The drive mechanism includes a disassembly head 13 fixedly connected to the bottom of the bolt head 4, and several sector blocks 14 fixedly connected at equal intervals to the lower end face of the disassembly head 13. The sector blocks 14 match the sector grooves 7. The bolt head 4 can be any one of hexagonal, dodecagonal, or square head. The nut 5 is threaded to the axial outside of the threaded rod 1. A limiting mechanism is provided below the nut 5. The limiting mechanism includes several vertical grooves 15 evenly distributed on the threaded rod 1, and several positioning holes 16 evenly distributed in the vertical grooves 15 along the length of the threaded rod 1. A rubber washer 17 is movably sleeved outside the threaded rod 1 and below the nut 5. A positioning ring 18 is movably sleeved outside the threaded rod 1 and below the rubber washer 17. Several positioning screws 19 that match the positioning holes 16 are threaded to both ends of the positioning ring 18.

[0026] In this embodiment, the movable head 3, the insertion rod 10, the slot 11 and the spring 9 work together to make the movable head 3 and the fixed head 2 separate and rotate freely in the non-operational state, which effectively solves the problem that existing anti-theft bolts can be clamped and driven by general tools because the driving part and the threaded part are fixedly connected.

[0027] Furthermore, through the combined use of the positioning ring 18, positioning screw 19, positioning hole 16 and rubber washer 17, mechanical locking and continuous elastic clamping of nut 5 are achieved, solving the problem that nut 5 is prone to rotation and loosening under vibration environment in conventional bolts.

[0028] Working principle: First, threaded rod 1 is passed through the component to be connected, then nut 5 is screwed in to the predetermined torque for initial tightening. Next, using a special tool, bolt head 4, the sector block 14 on the bottom of the disassembly head 13 is aligned with the sector groove 7 at the top of the fixing head 2 and pressed downwards. This downward pressure overcomes the elastic force of spring 9, pushing the sector head 8 downwards, forcing the insertion rod 10, fixedly connected to the bottom of the sector head 8, to insert and lock into the slot 11 of the fixing head 2, thus achieving a rigid connection between the movable head 3 and the fixing head 2. Simultaneously, the sector block 14 on the disassembly head 13 is fully embedded and engaged in the sector groove 7. Rotating bolt head 4 transmits torque sequentially through sector block 14 and fixing head 2 to threaded rod 1, causing it to rotate and completing the final tightening or disassembly of the bolt. Then, rubber washer 17 is fitted onto threaded rod 1 and pressed tightly against the lower end face of nut 5, and positioning ring 18 is then fitted onto... The threaded rod 1 is pressed against the rubber washer 17. Utilizing the slight axial adjustment stroke provided by the compression deformation of the rubber washer 17, the positioning ring 18 is slightly adjusted so that the positioning screw 19 on it can be precisely aligned and screwed into the positioning hole 16 of the corresponding height on the threaded rod 1, thereby completing the fixation of the positioning ring 18. At this time, the lower end face of the nut 5 abuts against the positioning ring 18 through the compressed rubber washer 17. Under the combined action of the mechanical locking of the positioning screw 19 and the continuous elastic pressure of the rubber washer 17, the rotation and loosening of the nut 5 are effectively suppressed. After the operation is completed, the bolt head 4 is removed, and the restoring force of the spring 9 immediately pushes the fan-shaped head 8 back to its original position, causing the insertion rod 10 to disengage from the slot 11. The transmission connection between the movable head 3 and the fixed head 2 is cut off, and the movable head 3 returns to the free-spinning state. At this time, if the movable head 3 is clamped with a conventional tool, it will be impossible to drive the fixed head 2 and the threaded rod 1 to rotate, and the anti-theft function is activated.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A theft-proof and anti-loosening bolt, characterized in that: include A threaded rod (1) has a fixed head (2) fixedly connected to its top end. A movable head (3) is provided at the top end of the fixed head (2). A docking mechanism is provided between the movable head (3) and the fixed head (2). The bolt head (4) has a driving mechanism at its bottom end, which works in conjunction with the docking mechanism. Nut (5), which is threaded to the outside of threaded rod (1) in the axial direction, and a limit mechanism is provided below nut (5).

2. The anti-theft and anti-loosening bolt according to claim 1, characterized in that: The docking mechanism includes a circular groove (6) at the top center of the fixed head (2) and fan-shaped grooves (7) evenly distributed on the outer circumference of the circular groove (6). A matching fan-shaped head (8) is slidably connected in the fan-shaped groove (7). A spring (9) is provided between the fan-shaped groove (7) and the fan-shaped head (8). The two ends of the spring (9) are fixedly connected to the inner bottom wall of the fan-shaped groove (7) and the lower end face of the fan-shaped head (8), respectively. A plug rod (10) is fixedly connected to the bottom center of the fan-shaped head (8). A slot (11) matching the plug rod (10) is provided on the inner bottom wall of the fan-shaped groove (7).

3. The anti-theft and anti-loosening bolt according to claim 2, characterized in that: The bottom middle of the movable head (3) is rotatably connected to the top middle of the fixed head (2) via a bearing. Positioning marks (12) are fixedly connected to the outside of both the fixed head (2) and the movable head (3) on one side.

4. The anti-theft and anti-loosening bolt according to claim 2, characterized in that: The driving mechanism includes a disassembly head (13) fixedly connected to the bottom end of the bolt head (4), and a number of fan-shaped blocks (14) fixedly connected at equal distances to the lower end face of the disassembly head (13), the fan-shaped blocks (14) matching the fan-shaped grooves (7).

5. The anti-theft and anti-loosening bolt according to claim 4, characterized in that: The shape of the plug head (4) can be hexagonal, dodecagonal, or square.

6. The anti-theft and anti-loosening bolt according to claim 1, characterized in that: The limiting mechanism includes several vertical grooves (15) evenly distributed on the threaded rod (1) and several positioning holes (16) evenly distributed in the vertical grooves (15) along the length of the threaded rod (1). A rubber washer (17) is movably sleeved outside the threaded rod (1) and below the nut (5). A positioning ring (18) is movably sleeved outside the threaded rod (1) and below the rubber washer (17). Both ends of the positioning ring (18) are threaded with several positioning screws (19) that match the positioning holes (16).

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