A jaw-type check screw fastener

Abstract

The utility model belongs to screw technical field, especially relate to a clamping jaw type anti-loose screw fastener. The utility model discloses a screw main part, nut, anti-loose cap, anti-loose collet, wherein, first step part is used for cooperating with annular step, so that anti-loose collet bears against anti-loose cap, clamping jaw is used for cooperating with annular clamping jaw groove, so that anti-loose collet holds nut. The utility model discloses anti-loose collet through the clamping jaw embedding annular clamping jaw groove, so that anti-loose collet holds nut, and anti-loose cap is engaged with the working vertical tooth on screw through the anti-loose vertical tooth of inner wall setting, holds nut, and anti-loose collet is used for cooperating with annular step through first step part, so that anti-loose collet bears against anti-loose cap, and the locking is formed between nut, anti-loose cap and anti-loose collet two by two, and further constitutes stable screw fastener.

Description

Technical Field

[0001] This utility model belongs to the field of screw technology, and specifically relates to a claw-type anti-loosening screw fastener. Background Technology

[0002] Bolted connections may loosen or break under complex working conditions such as vibration, leading to detachment accidents due to severe vibration. To solve the loosening problem, existing technologies attempt to prevent detachment by using clamps.

[0003] CN 222686618U discloses a drilling screw, specifically comprising a bypass valve section, an anti-detachment section, a motor section, a universal joint section, and a drive shaft section arranged sequentially. The anti-detachment section includes an anti-detachment shell and an anti-detachment rod. One end of the anti-detachment shell is connected to the bypass valve section, and the other end is connected to the motor section. A limiting ring is provided on the inner circumferential wall of the anti-detachment shell, and the inner wall of the limiting ring has multiple circumferentially distributed notches. One end of the anti-detachment rod is connected to the motor section, and the other end passes through the limiting ring and is provided with a limiting head. The limiting head includes multiple circumferentially distributed claws, and a guide groove is formed between adjacent claws. The number of claws is less than the number of notches, and the notches do not allow the claws to pass through. This technical solution uses claws, but the main function of the claws is to greatly reduce the resistance of the fluid passing through the anti-detachment section; they are not used for tightening bolts.

[0004] Therefore, existing technologies still require efficient bolt connection devices. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a claw-type anti-loosening screw fastener. The claws engage with an annular claw groove, causing the anti-loosening sleeve to lock the nut in place. The anti-loosening cap, through anti-loosening vertical teeth on its inner wall, meshes with the working vertical teeth on the screw, further securing the nut. The detailed technical solution of this utility model is described below.

[0006] A claw-type anti-loosening screw fastener, characterized in that it includes a screw body, wherein working threads and working vertical teeth are sequentially arranged on the screw body along its length direction, and the working vertical teeth are evenly distributed along the circumference of the screw; The nut has an internal working thread on its inner wall that meshes with the working thread, and a plurality of axial grooves are distributed circumferentially on the end face of the nut. The outer wall of the nut near the axial grooves has an annular claw groove. The anti-loosening cap includes a hollow cap body, the inner wall of which is provided with anti-loosening vertical teeth that cooperate with the working vertical teeth, and an annular step extending outward along one end of the circumferential edge of the cap body. The end face of the annular step is provided with a fastening protrusion key corresponding to the axial groove of the nut. An anti-loosening sleeve is provided with a mounting hole at its center, and a first step and a second step are provided outwardly along the circumferential edge of the mounting hole. The second step is higher than the first step in the axial direction, and at least one claw is provided on the second step extending in the axial direction. The first stepped portion is used to cooperate with the annular step so that the anti-loosening sleeve abuts against the anti-loosening cap; the claw is used to cooperate with the annular claw groove so that the anti-loosening sleeve locks the nut.

[0007] In a preferred embodiment, the claw extends upward from the top surface of the second step.

[0008] In a preferred embodiment, the protruding end of the claw is provided with an undercut portion extending toward the inner side of the annular claw groove, and the undercut portion forms an interference fit with the groove wall of the annular claw groove.

[0009] In a preferred embodiment, the claws are provided in multiple manner and are spaced apart along the circumferential direction of the top surface of the second step.

[0010] In a preferred embodiment, the diameter of the mounting hole is greater than the diameter of the cap body and less than the maximum diameter of the annular step, and the maximum diameter of the annular step is less than the maximum diameter of the first step portion.

[0011] In a preferred embodiment, the fastening convex key is a single key or multiple keys.

[0012] In a preferred embodiment, the screw body further includes a screw head, and the working thread is disposed on the side close to the screw head.

[0013] The beneficial effects of this utility model are as follows: (1) The anti-loosening sleeve of this utility model is embedded in the annular claw groove by the claw, so that the anti-loosening sleeve can hold the nut. The anti-loosening cap is engaged with the working vertical teeth on the screw by the anti-loosening vertical teeth set on the inner wall, and the anti-loosening sleeve is used to cooperate with the annular step by the first step, so that the anti-loosening sleeve presses against the anti-loosening cap. In this way, the nut, the anti-loosening cap and the anti-loosening sleeve are locked together, thus forming a stable screw fastener.

[0014] (2) Moreover, the anti-loosening sleeve of this utility model has a flexible structure, does not require precise alignment of nuts and anti-loosening caps, is easy to install, can achieve efficient fastening, can meet the complex working conditions of high-speed rail, bridges, wind turbine power generation, power transmission and industrial production equipment with strict requirements for spiral connection, and has broad market application prospects. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2This is a schematic diagram showing the disassembled parts of this utility model; Figure 3 This is a schematic diagram of the anti-loosening sleeve of this utility model; Figure 4 This is a schematic diagram of the anti-loosening cap of this utility model; Figure 5 This is a schematic diagram of the overall design of this utility model.

[0016] Reference numerals: 1. Screw body; 11. Working thread; 12. Working vertical tooth; 2. Nut; 21. Axial groove; 22. Annular claw groove; 3. Anti-loosening cap; 31. Cap body; 32. Anti-loosening vertical tooth; 33. Annular step; 34. Fastening protrusion; 4. Anti-loosening sleeve; 41. Assembly hole; 42. First step part; 43. Second step part; 44. Claw; 45. Undercut part. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0018] A type of claw-type anti-loosening screw fastener, such as Figure 1-5 The device includes a screw body 1, on which working threads 11 and working vertical teeth 12 are sequentially arranged along the length direction, and the working vertical teeth 12 are evenly distributed along the circumference of the screw. Nut 2, the inner wall of nut 2 is provided with working internal thread that meshes with working thread 11, the end face of nut 2 is provided with a plurality of axial grooves 21 distributed circumferentially, and the outer wall of nut 2 near the axial grooves 21 is provided with an annular claw groove 22. The anti-loosening cap 3 includes a hollow cap body 31. The inner wall of the cap body 31 is provided with anti-loosening vertical teeth 32 that cooperate with the working vertical teeth 12, and an annular step 33 extending outward along one end of the circumferential edge of the cap body 31. The end face of the annular step 33 is provided with a fastening protrusion key 34 corresponding to the axial groove 21 of the nut 2. Anti-loosening sleeve 4, the center of the anti-loosening sleeve 4 is provided with an assembly hole 41, and a first step portion 42 and a second step portion 43 are provided outward along the circumferential edge of the assembly hole 41. The height of the second step portion 43 along the axial direction is higher than that of the first step portion 42. At least one claw 44 is provided on the second step portion 43 along the axial direction. The first step portion 42 is used to cooperate with the annular step 33 so that the anti-loosening sleeve 4 abuts against the anti-loosening cap 3; the claw 44 is used to cooperate with the annular claw groove 22 so that the anti-loosening sleeve 4 locks the nut 2.

[0019] This utility model's anti-loosening sleeve uses a claw to embed into an annular claw groove, allowing the anti-loosening sleeve to hold the nut. The anti-loosening cap, through anti-loosening vertical teeth set on its inner wall, meshes with the working vertical teeth on the screw, holding the nut in place. The anti-loosening sleeve, through its first step portion, is used to cooperate with the annular step, so that the anti-loosening sleeve presses against the anti-loosening cap. In this way, the nut, anti-loosening cap, and anti-loosening sleeve are locked together, thus forming a stable screw fastener.

[0020] As a preferred embodiment, such as Figure 3 As shown, the claw 44 extends upward from the top surface of the second step portion 43. One protruding end of the claw 44 has a reversed portion 43 extending towards the inner side of the annular claw groove 22, and the reversed portion 43 forms an interference fit with the groove wall of the annular claw groove 22. Multiple claws 44 are provided and spaced apart along the circumferential direction of the top surface of the second step portion 43. In this embodiment, there are four. The diameter of the mounting hole 41 is larger than the diameter of the cap body 31 but smaller than the maximum diameter of the annular step 33, and the maximum diameter of the annular step 33 is smaller than the maximum diameter of the first step portion 42.

[0021] In a preferred embodiment, the fastening protrusion 34 is a single key or multiple keys. Example 2

[0022] The difference between this embodiment and Embodiment 1 is that the screw body does not include a screw head. In Embodiment 1, the screw body includes a screw head, and the working thread 11 is located on the side close to the screw head.

[0023] In summary, this utility model of anti-loosening sleeve has a flexible structure, does not require precise alignment of nuts and anti-loosening caps, is easy to install, can achieve efficient fastening, and can meet the complex working conditions of high-speed rail, bridges, wind power generation, power transmission and industrial production equipment with strict requirements for spiral connections, and has broad market application prospects.

[0024] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A claw-type anti-loosening screw fastener, characterized in that, The screw body includes a screw body, on which working threads and working vertical teeth are sequentially provided along the length direction, and the working vertical teeth are evenly distributed along the circumference of the screw. The nut has an internal working thread on its inner wall that meshes with the working thread, and a plurality of axial grooves are distributed circumferentially on the end face of the nut. The outer wall of the nut near the axial grooves has an annular claw groove. The anti-loosening cap includes a hollow cap body, the inner wall of which is provided with anti-loosening vertical teeth that cooperate with the working vertical teeth, and an annular step extending outward along one end of the circumferential edge of the cap body. The end face of the annular step is provided with a fastening protrusion key corresponding to the axial groove of the nut. An anti-loosening sleeve is provided with a mounting hole at its center, and a first step and a second step are provided outwardly along the circumferential edge of the mounting hole. The second step is higher than the first step in the axial direction, and at least one claw is provided on the second step extending in the axial direction. The first stepped portion is used to cooperate with the annular step so that the anti-loosening sleeve abuts against the anti-loosening cap; the claw is used to cooperate with the annular claw groove so that the anti-loosening sleeve locks the nut.

2. The anti-loosening screw fastener according to claim 1, characterized in that, The claw extends upward from the top surface of the second step.

3. The anti-loosening screw fastener according to claim 2, characterized in that, The protruding end of the claw is provided with an undercut portion extending toward the inside of the annular claw groove, and the undercut portion forms an interference fit with the groove wall of the annular claw groove.

4. The anti-loosening screw fastener according to claim 2, characterized in that, The claws are provided in multiple sizes and are distributed at intervals along the circumferential direction of the top surface of the second step.

5. The anti-loosening screw fastener according to claim 1, characterized in that, The diameter of the assembly hole is greater than the diameter of the cap body but less than the maximum diameter of the annular step, and the maximum diameter of the annular step is less than the maximum diameter of the first step portion.

6. The anti-loosening screw fastener according to claim 1, characterized in that, The fastening convex key can be a single key or multiple keys.

7. The anti-loosening screw fastener according to claim 1, characterized in that, The screw body also includes a screw head, and the working thread is provided on the side close to the screw head.

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