Fastening assembly with anti-loosening structure

Abstract

The utility model relates to the technical field of fasteners, in particular to a fastening assembly with an anti-loosening structure. The anti-loosening bolt comprises a bolt head, a connecting body fixedly installed on the axial side face of the bolt head and an anti-loosening spring arranged on the outer side of the connecting body in a sleeving mode. A limiting groove capable of limiting the circumferential outer side of the anti-loosening spring is formed between the bolt head and the connecting body. After the prior art is improved, the anti-loose spring is uniformly stressed, and the service life and the anti-loose effect of the anti-loose spring are not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a fastening assembly with an anti-loosening structure. Background Art

[0002] Fasteners are a type of mechanical parts used for fastening connections and are extremely widely applied. Fasteners are used in a wide range of industries, including energy, electronics, electrical appliances, machinery, chemical industry, metallurgy, molds, hydraulics, etc. Various fasteners can be seen on various machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemical industry, meters, and supplies. They are the most widely used basic mechanical parts. However, most existing bolts are ordinary connecting bolts without anti-loosening functions, with poor locking effects and low stability, and cannot ensure the stability of the connection for a long time.

[0003] In view of this, a Chinese patent document with the publication number CN210799676U discloses an anti-loosening bolt for furniture, which includes a bolt head, a transition section, a smooth rod section, a threaded section, an anti-loosening spring, an anti-loosening gasket, and a locking nut. A transition section is provided at the center of the bottom of the bolt head. A smooth rod section is provided at the bottom end of the transition section. A threaded section is provided at the bottom end of the smooth rod section. An anti-loosening gasket and a locking nut are sleeved on the outer side of the threaded section. The locking nut is located below the anti-loosening gasket. An anti-loosening spring is provided between the anti-loosening gasket and the bottom end of the transition section. The bolt head end of the above anti-loosening bolt relies on the transition section to fix and limit the anti-loosening spring from the inside. Due to the limited and uneven contact surface between the outer arc surface of the transition section and the inner side of the anti-loosening spring in this fixing method, the anti-loosening spring is unevenly stressed, which easily causes the elastic force of the anti-loosening spring to deviate from the axial direction of the bolt, affecting the service life and anti-loosening effect of the anti-loosening spring.

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

[0005] The technical problem to be solved by the utility model is to provide a fastening assembly with an anti-loosening structure in view of the deficiencies of the above existing technologies, and solve the problem that the service life and anti-loosening effect of the anti-loosening spring are affected due to the uneven stress of the anti-loosening spring in the existing technology.

[0006] To achieve the above object, the utility model provides the following technical solution: A fastening assembly with an anti-loosening structure includes a bolt head, a connecting body fixedly installed on the axial side of the bolt head, and an anti-loosening spring sleeved on the outer side of the connecting body. A limiting groove capable of circumferentially limiting the outer side of the anti-loosening spring is provided between the bolt head and the connecting body.

[0007] With the above technical solution, after the fastening assembly is installed, the anti-loosening spring directly abuts against the axial side surface of the bolt head, and then the anti-loosening spring is further circumferentially limited from the outer circumferential side surface through the limiting groove. In this way, the anti-loosening spring is limited in the abutment from both the axial side surface and the circumferential outer side, making the force on the anti-loosening spring more uniform and stable, and the elastic force of the anti-loosening spring does not deviate from the axis of the bolt, thus not affecting the service life and anti-loosening effect of the anti-loosening spring.

[0008] The further setting of the above technical solution is: the connecting body is a screw rod, an external thread is provided on the outer side surface of the screw rod, a limiting convex ring extends axially from the circumferential outer side surface of the bolt head, the inner side surface of the limiting convex ring abuts against the outer side surface of the anti-loosening spring, and the limiting groove is formed by the gap between the limiting convex ring and the screw rod.

[0009] With the above technical solution, during installation, the screw rod is tightly connected with the internal thread hole outside through cooperation, and the anti-loosening spring is compressed to generate elastic force, which can prevent the bolt head and the screw rod from loosening; the inner side surface of the limiting convex ring abuts against the outer side surface of the anti-loosening spring to limit the outer side surface of the anti-loosening spring, increasing the force-bearing surface and making the force on the anti-loosening spring more uniform.

[0010] The further setting of the above technical solution is: a transition inclined surface is provided at the connection between the inner side of the limiting convex ring and the bolt head.

[0011] With the above technical solution, the transition inclined surface can further increase the force-bearing contact surface of the anti-loosening spring, making the anti-loosening spring more stable in limiting and more uniform in force.

[0012] The further setting of the above technical solution is: a conical reinforcing rib is provided at the connection end of the screw rod and the bolt head.

[0013] With the above technical solution, by providing a reinforcing rib at the connection end of the screw rod and the bolt head, the connection between the screw rod and the bolt head is made more firm.

[0014] The further setting of the above technical solution is: the connecting body is a threaded pipe, an internal thread hole is provided inside the threaded pipe, a limiting ring that abuts against the outer side surface of the anti-loosening spring is provided on the periphery of the threaded pipe, and the limiting groove is formed by the gap between the limiting ring and the threaded pipe.

[0015] With the above technical solution, during installation, the internal thread hole in the threaded pipe is tightly connected with the external threaded rod outside through cooperation. After the anti-loosening spring is compressed, the limiting ring abuts against the outer side surface of the anti-loosening spring, which can limit and fix the outer side of the anti-loosening spring, making the anti-loosening spring more stable in limiting and more uniform in force.

[0016] The further setting of the above technical solution is: the height of the limiting ring is flush with the height of the threaded pipe.

[0017] With the above technical solution, the height of the limiting ring is flush with the height of the threaded tube, which can not only maximize the abutting and limiting of the anti-loosening spring by the limiting ring, but also wrap and protect the anti-loosening spring in the limiting groove.

[0018] A further setting of the above technical solution is that a plurality of anti-slip teeth are evenly arranged on the circumferential side surface of the bolt head.

[0019] With the above technical solution, the anti-slip teeth can increase the friction during screwing, making disassembly and assembly more labor-saving.

[0020] The beneficial effects achieved by the present utility model are that the anti-loosening spring is evenly stressed without affecting the service life and anti-loosening effect of the anti-loosening spring. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of Embodiment 1 of the present utility model;

[0022] Figure 2 is an exploded structural diagram of Embodiment 1 of the present utility model;

[0023] Figure 3 is a schematic structural diagram of Embodiment 2 of the present utility model;

[0024] Figure 4 is an exploded structural diagram of Embodiment 2 of the present utility model. Embodiment

[0025] The present utility model will be further described below in conjunction with the embodiments:

[0026] Specific Embodiment 1: As shown in Figure 1 、 2 , a fastening assembly with an anti-loosening structure includes a bolt head 1, a screw rod 2 fixedly installed on the axial side surface of the bolt head 1, and an anti-loosening spring 3 sleeved outside the screw rod 2. The outer side surface of the screw rod 2 is provided with an external thread. A limiting convex ring 4 extends axially from the circumferential outer side surface of the bolt head 1. The inner side surface of the limiting convex ring 4 abuts against the outer side surface of the anti-loosening spring 3. A limiting groove is formed by the gap between the limiting convex ring 4 and the screw rod 2. A transition inclined surface 41 is provided at the connection between the inner side of the limiting convex ring 4 and the bolt head 1. A conical reinforcing rib 21 is provided at the connection end of the screw rod 2 and the bolt head 1.

[0027] The fastening assembly is fixedly connected with an external internal thread hole through the screw rod 2. After installation, the anti-loosening spring 3 directly abuts against the axial side surface of the bolt head 1, and then the anti-loosening spring 3 is further circumferentially limited from the outer circumferential side surface by the limiting convex ring 4. In this way, the anti-loosening spring 3 is abutted and limited from two directions, namely the axial side surface and the circumferential outer side, making the anti-loosening spring 3 more evenly and stably stressed, and the elastic force of the anti-loosening spring 3 does not deviate from the axis of the bolt, thus not affecting the service life and anti-loosening effect of the anti-loosening spring 3.

[0028] Specific Embodiment Two: As shown in Figure 3 , 4 , a fastening component with an anti-loosening structure includes a bolt head 1, a threaded tube 5 fixedly installed on the axial side of the bolt head 1, and an anti-loosening spring 3 sleeved outside the threaded tube 5. An internal threaded hole 51 is provided inside the threaded tube 5, and a limiting ring 6 that abuts against the outer side surface of the anti-loosening spring 3 is provided on the periphery of the threaded tube 5. A limiting groove is formed by the gap between the limiting ring 6 and the threaded tube 5, and the height of the limiting ring 6 is flush with the height of the threaded tube 5.

[0029] This specific embodiment can be adapted to another usage scenario. The fastening component is tightly connected with an external external threaded rod through the internal threaded hole 51 in the threaded tube 5. After installation, the anti-loosening spring 3 directly abuts against the axial side surface of the bolt head 1, and then the anti-loosening spring 3 is further circumferentially limited from the outer peripheral side surface by the limiting ring 6. In this way, the anti-loosening spring 3 is limited in contact from both the axial side surface and the circumferential outer side directions, making the force on the anti-loosening spring 3 more uniform and stable. The elastic force of the anti-loosening spring 3 does not deviate from the axis of the bolt, thus not affecting the service life and anti-loosening effect of the anti-loosening spring 3.

[0030] Specific Embodiment Three: As shown in Figures 1-4 , based on the technical solutions of Specific Embodiment One and Specific Embodiment Two, the following further settings can be made: A number of anti-slip teeth 11 are evenly arranged on the circumferential side surface of the bolt head 1. The anti-slip teeth 11 can increase the friction during screwing and unscrewing, making the disassembly and assembly more labor-saving.

Claims

1. A fastening assembly with an anti-loosening structure, comprising a bolt head, a connecting body fixedly mounted on the axial side of the bolt head, and an anti-loosening spring sleeved on the outside of the connecting body, characterized in that: A limiting groove is provided between the bolt head and the connecting body, which can limit the circumferential outer side of the anti-loosening spring. The connecting body is a threaded tube, and an internal threaded hole is provided inside the threaded tube. A limiting ring is provided on the outer periphery of the threaded tube to abut against the outer side surface of the anti-loosening spring. The limiting groove is formed by the gap between the limiting ring and the threaded tube, and the height of the limiting ring is flush with the height of the threaded tube.

2. The fastening assembly with anti-loosening structure according to claim 1, characterized in that: A plurality of anti-slip racks are evenly arranged on the circumferential side of the bolt head.

3. A fastening assembly with an anti-loosening structure, comprising a bolt head, a connecting body fixedly mounted on the axial side of the bolt head, and an anti-loosening spring sleeved on the outside of the connecting body, characterized in that: A limiting groove is provided between the bolt head and the connecting body, which can limit the circumferential outer side of the anti-loosening spring. The connecting body is a screw rod, and the outer side surface of the screw rod is provided with an external thread. A limiting convex ring extends axially from the circumferential outer side surface of the bolt head, and the inner side surface of the limiting convex ring abuts against the outer side surface of the anti-loosening spring. The limiting groove is formed by the gap between the limiting convex ring and the screw rod. A transition inclined surface is provided at the connection between the inner side of the limiting convex ring and the bolt head, and a conical reinforcing rib is provided at the connecting end of the screw rod and the bolt head.

4. The fastening assembly with anti-loosening structure according to claim 3, characterized in that: A plurality of anti-slip racks are evenly arranged on the circumferential side of the bolt head.

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