Fastener anti-loosening structure

Abstract

The utility model relates to the technical field of fasteners, in particular to an anti-loosening structure of a fastener. The fastening piece comprises a fastening piece body, a first threaded hole is formed in the upper end face of the fastening piece body, a stud is in threaded connection with the interior of the first threaded hole, the bottom of the stud extends into the fastening piece body and is detachably connected with a gasket, the upper end, close to the gasket, of the stud is in threaded connection with a retaining block, and the retaining block is connected with the fastening piece body in an up-down sliding mode. A first threaded hole is formed in the top of the fastener body, a second threaded hole is formed in the center of the retaining block, right-hand threads matched with the first threaded hole are arranged at the upper end of the stud, left-hand threads matched with the second threaded hole are arranged at the lower end of the stud, and the thread pitch of the right-hand threads on the stud is smaller than that of the left-hand threads. The guide columns are sleeved with multiple layers of belleville spring sets, and guide holes are formed in the retaining blocks. After the prior art is improved, the anti-loose structure is high in stability, capable of automatically compensating pre-tightening force and good in anti-loose effect, and the retaining block is convenient to disassemble and assemble.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, and in particular to a fastener anti-loosening structure. Background Technology

[0002] Fasteners are a type of mechanical part used for fastening connections and are widely used. Because fasteners play a role in fixing connections, they are prone to loosening on some equipment that vibrates during operation, which can lead to safety hazards.

[0003] In view of this, the existing Chinese utility model patent with publication number CN218493997U discloses an anti-loosening fastener, which achieves anti-loosening through structures such as springs. However, the springs installed in the cavity of the support block are prone to falling off and are easily bent and deformed when squeezed, resulting in uneven force. Furthermore, the sliders on both sides of the retaining block are inserted into the sliding grooves on both sides of the fastener body, making disassembly and assembly very inconvenient.

[0004] Therefore, it is necessary to improve upon the shortcomings of the existing technologies mentioned above. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a fastener anti-loosening structure to address the shortcomings of the prior art, thereby solving the problems of easy detachment and deformation of the spring in the anti-loosening fastener and inconvenience in disassembling and assembling the retaining block in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fastener anti-loosening structure, comprising a fastener body, a first threaded hole on the upper surface of the fastener body, a stud threadedly connected to the inside of the first threaded hole, the bottom of the stud extending into the interior of the fastener body and detachably connected to a washer, a retaining block threadedly connected to the upper end of the stud near the washer, the retaining block slidingly connected to the fastener body, a second threaded hole at the center of the retaining block, the upper end of the stud having a positive thread that mates with the first threaded hole, and the lower end having a negative thread that mates with the second threaded hole, wherein the pitch of the positive thread on the stud is smaller than the pitch of the negative thread, a plurality of downwardly extending guide posts are provided circumferentially on the top of the fastener body, a multi-layer disc spring assembly is sleeved on the guide posts, and the retaining block has guide holes that are clearance-fitted with the guide posts.

[0007] Using the above technical solution, the multi-layer disc spring assembly has higher stability than ordinary springs. The guide post limits its movement to prevent it from falling off or deforming. When the fastener becomes slightly loose due to vibration, the disc spring releases the stored elastic potential energy and automatically compensates for the preload, thereby providing a better anti-loosening effect.

[0008] A further provision of the above technical solution is as follows: both sides of the fastener body are provided with sliding grooves, and both sides of the retaining block are provided with fixing grooves corresponding to the positions of the sliding grooves. A spring is installed inside the fixing groove, and a slider that abuts against the spring is slidably installed on the outside of the fixing groove. The length of the slider is greater than the depth of the sliding groove.

[0009] By adopting the above technical solution, the length of the slider is greater than the depth of the groove, so that after the slider is inserted into the groove, it can stably limit the holding block and slide up and down along the groove. Under the action of the spring, the slider can slide in the fixed groove, ensuring the limiting effect while greatly improving the convenience of disassembly and assembly.

[0010] A further provision of the above technical solution is that: a screw is provided at the center of the upper end of the gasket, a third threaded hole is provided on the bottom surface of the stud, and the screw is threadedly connected to the third threaded hole.

[0011] By adopting the above technical solution, a detachable connection between the gasket and the stud is achieved, which facilitates the installation and replacement of the gasket during actual use.

[0012] A further provision of the above technical solution is that mounting holes are provided on both sides of the fastener body, and a through hole is provided at the bottom of the fastener body.

[0013] By adopting the above technical solution, the mounting holes and through holes facilitate the disassembly and assembly of screws, retaining blocks and washers, and also facilitate the installation of the fastener body.

[0014] A further feature of the above technical solution is that an installation groove is provided at the upper end of the stud.

[0015] The above technical solution facilitates the use of tools to tighten or disassemble the studs, thus improving ease of use.

[0016] The beneficial effects achieved by this utility model are as follows: replacing the spring with a multi-layer disc spring assembly and limiting the multi-layer disc spring assembly with guide posts improves stability. When the fastener becomes slightly loose due to vibration, the disc spring releases its stored elastic potential energy and automatically compensates for the pre-tightening force, providing a better anti-loosening effect. By using elastic and slidably mounted sliders on both sides of the retaining block, and with the slider length greater than the groove depth, it is possible to ensure that the slider is locked into the groove to securely limit the retaining block, while making disassembly and assembly easier and faster. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0018] Figure 2 This is an exploded structural diagram of an embodiment of the present invention;

[0019] Figure 3This is a schematic diagram of the stud structure in an embodiment of this utility model.

[0020] The markings in the diagram are: 1. Fastener body; 11. First threaded hole; 12. Slide groove; 13. Guide post; 14. Mounting hole; 15. Through hole; 2. Stud; 21. Positive thread; 22. Negative thread; 23. Third threaded hole; 24. Mounting groove; 3. Washer; 31. Screw; 4. Retaining block; 41. Second threaded hole; 42. Guide hole; 43. Fixing groove; 5. Multi-layer disc spring assembly; 6. Spring; 7. Slider. Detailed Implementation

[0021] 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.

[0022] like Figure 1-3 As shown, a fastener anti-loosening structure includes a fastener body 1. A first threaded hole 11 is formed on the upper surface of the fastener body 1. A stud 2 is threaded into the first threaded hole 11. The bottom of the stud 2 extends into the fastener body 1 and is threadedly connected to a third threaded hole 23 on the bottom surface of the stud 2 via a screw 31 at the center of the upper end of a washer 3, achieving a detachable connection. A retaining block 4 is threadedly connected to the upper end of the stud 2 near the washer 3. The retaining block 4 is slidably connected to the fastener body 1. A second threaded hole 41 is formed at the center of the retaining block 4. The upper end of the stud 2 has a positive thread 21 that mates with the first threaded hole 11, and the lower end has a negative thread 22 that mates with the second threaded hole 41. The pitch of the positive thread 21 on the stud 2 is smaller than the pitch of the negative thread 22. Several downwardly extending guide posts 13 are circumferentially arranged on the top of the fastener body 1. A multi-layer disc spring assembly 5 is sleeved on each guide post 13. The retaining block 4 has guide holes 42 that are clearance-fitted with the guide posts 13. The fastener body 1 has sliding grooves 12 on both sides inside. The retaining block 4 has fixing grooves 43 on both sides corresponding to the positions of the sliding grooves 12. A spring 6 is installed inside the fixing groove 43, and a slider 7 that abuts against the spring 6 is slidably installed on the outside. The length of the slider 7 is greater than the depth of the sliding groove 12. Mounting holes 14 are opened on both sides of the fastener body 1. A through hole 15 is opened at the bottom of the fastener body 1. A mounting groove 24 is opened at the upper end of the stud 2.

[0023] In the above embodiment, the fastener body 1 is first installed on the equipment through the mounting hole 14 and through hole 15. During the installation process, the multi-layer disc spring group 5 is compressed and stores elastic potential energy. When the equipment vibrates and causes slight loosening of the fastener, the disc springs release elastic potential energy, automatically compensating for the pre-tightening force and achieving anti-loosening. The slider 7 is engaged in the slide groove 12 under the action of the spring 6. Since the length of the slider 7 is greater than the depth of the slide groove 12, it can stably limit the position of the retaining block 4. During disassembly and assembly, the slider 7 can slide within the fixed groove 43, reducing the difficulty of disassembly and assembly and making the operation easier and faster. This utility model effectively improves the stability and anti-loosening effect of the fastener, while facilitating disassembly and assembly, and has high practical value.

Claims

1. A fastener anti-loosening structure, comprising a fastener body (1), a first threaded hole (11) is formed in the upper end face of the fastener body (1), a stud (2) is threadedly connected in the first threaded hole (11), the bottom of the stud (2) extends to the inside of the fastener body (1) and is detachably connected with a gasket (3), a retaining block (4) is threadedly connected on the upper end of the stud (2) close to the gasket (3), the retaining block (4) is slidingly connected with the fastener body (1) up and down, a second threaded hole (41) is formed in the center of the retaining block (4), the stud (2) is provided with a right thread (21) matched with the first threaded hole (11) on the upper end and a left thread (22) matched with the second threaded hole (41) on the lower end, and the pitch of the right thread (21) on the stud (2) is smaller than the pitch of the left thread (22). The fastener body (1) top is provided with several downward extending guide posts (13), the guide posts (13) are provided with multiple layers of disc spring groups (5), the retaining block (4) is provided with a guide hole (42) that is in clearance fit with the guide post (13).

2. The fastener anti -loosening structure according to claim 1, characterized in that: The fastener body (1) is provided with a sliding groove (12) on both sides, the retaining block (4) is provided with a fixed groove (43) corresponding to the position of the sliding groove (12), the fixed groove (43) is internally provided with a spring (6), externally provided with a sliding block (7) in abutment with the spring (6), the length of the sliding block (7) is greater than the depth of the sliding groove (12).

3. The fastener anti -loosening structure according to claim 2, wherein: The gasket (3) is provided with a screw rod (31) at the upper end, the bottom surface of the stud (2) is provided with a third threaded hole (23), the screw rod (31) is in threaded connection with the third threaded hole (23).

4. The fastener anti -loosening structure according to claim 3, wherein: The fastener body (1) is provided with a mounting hole (14) on both sides, the bottom of the fastener body (1) is provided with a through hole (15).

5. The fastener anti -loosening structure according to any one of claims 1 to 4, wherein: The upper end of the stud (2) is provided with a mounting groove (24).

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