Snap-on anti-loose screw fastener

Abstract

The utility model belongs to screw technical field, especially relates to a pop -on formula lock screw fastener, including screw body, nut, lock washer, elastic pad, flat pad, snap ring, the screw body is sequentially provided with work thread, work vertical tooth and snap ring groove along the length direction, vertical tooth evenly distributes along the screw circumference, the inner wall of nut is provided with the work internal thread that is engaged with work thread, the nut end surface is circumferentially distributed with a plurality of axial grooves, the inner wall of lock washer is provided with the lock washer vertical tooth that is matched with work vertical tooth, the cap body end surface is equipped with the fastening key that corresponds with the axial groove of nut, elastic pad is corrugated spring shape, flat pad is circular, snap ring is matched with snap ring groove. Corrugated pop -on formula can provide sustained, even top pressure, effectively compensate the clearance produced by vibration, avoid the relative displacement caused by the hard impact between each part, can realize efficient fastening, need not accurate alignment, convenient installation, have broad market application prospect.

Description

Technical Field

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

[0002] Bolted connections are prone to loosening and failure under complex working conditions such as vibration. Existing locking components are of a single type and have a simple structure. Most of them are locks that require manual operation to open or close, and cannot achieve spring-back locking, which brings certain inconvenience to people's use.

[0003] Chinese invention patent CN105240355B discloses a spring-loaded connector, including a connecting nut with an elastic element inside. One end of the connecting nut is screwed to a pressing member, and the other end is inserted into a connector. A locking member is also provided inside the connecting nut. When the connector is inserted into the connecting nut, the locking member locks the connector, preventing it from detaching from the connecting nut. The elastic element is located between the locking member and the pressing member, and the pressing member can be screwed into the connecting nut to compress the elastic element and press it against the locking member. This technical solution uses a spring-loaded connector; however, the screw and nut only provide a single axial connection, leaving room for improvement in preventing loosening.

[0004] Therefore, existing technologies still need to effectively address the problem of bolted connection devices that prevent loosening. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a spring-loaded anti-loosening screw fastener. The spring-loaded mechanism ensures a tight engagement between the nut and the anti-loosening cap. The detailed technical solution of this utility model is described below.

[0006] A spring-loaded anti-loosening screw fastener includes a screw body, on which a working thread, a working vertical tooth, and a retaining ring groove are sequentially provided along the length direction, and the vertical tooth is 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 number of axial grooves are distributed circumferentially on the end face of the nut. 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 the end face of the cap body is provided with a fastening protrusion key that corresponds to the axial groove of the nut; A spring pad, which is in the shape of a corrugated spring, is used to limit the anti-loosening cap during assembly; A flat pad, which is circular in shape, is used to limit the position of the spring pad during assembly; A retaining ring, which engages with a retaining ring groove, is used to fasten the flat gasket.

[0007] Preferably, the wave crests of the elastic pad have a circular arc transition, and the wave crests are set to be multiple and evenly distributed along the circumference of the elastic pad.

[0008] Preferably, the hollow inner diameter of the flat pad is the same as the hollow inner diameter of the spring pad.

[0009] Preferably, the screw body further includes a screw head, and the working thread is provided on the side close to the screw head.

[0010] The beneficial effects of this utility model are as follows: This invention overcomes the shortcomings of existing anti-loosening technologies by using a double-threaded structure with opposing working and anti-loosening threads on the screw body, along with an elastically engaged composite anti-loosening structure. Combined with the continuous elastic pressure of the spring clip, this creates a bidirectional locking loop between the nut and the anti-loosening cap. When the nut shows a tendency to loosen along the working thread under vibration conditions, its loosening rotation will engage with the fastening key through the axial groove, causing the anti-loosening cap to tighten in the opposite direction along the anti-loosening thread. The anti-loosening effect is far superior to existing solutions that rely on a single elastic element for pressure, and it is stably applicable to complex working conditions such as strong vibration and high-frequency impact.

[0011] Adopting an integrated locking design, no additional anti-loosening accessories are required. During assembly, first screw the nut to the preset position through the working thread, then screw the anti-loosening cap in through the anti-loosening thread, and make the fastening protrusion engage with the axial groove. The spring clip automatically achieves precise fit and tightening through the corrugated elastic structure. The entire process does not require complicated tools or auxiliary procedures, truly achieving "locking upon rotation", greatly simplifying the assembly process, improving construction efficiency, and reducing labor costs.

[0012] The corrugated spring clip provides continuous and uniform top pressure, effectively compensating for gaps caused by vibration and preventing relative displacement between components due to hard impacts; the anti-loosening vertical teeth of the anti-loosening cap increase frictional resistance, further preventing accidental rotation and ensuring that the locking effect is maintained even after long-term use. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0014] Figure 2 This is a schematic diagram showing the disassembled parts of this utility model; Figure 3 This is a schematic diagram of the spring pad of this utility model; Figure 4 This is a schematic diagram of the gasket of this utility model; Figure 5 This is a three-dimensional schematic diagram of the present invention without the screw head.

[0015] Reference numerals in the attached drawings: 1. Screw body; 11. Working thread; 12. Working vertical tooth; 13. Snap ring groove; 14. Screw head; 2. Nut; 21. Axial groove; 3. Anti-loosening cap; 31. Cap body; 32. Anti-loosening vertical tooth; 33. Fastening protrusion; 4. Spring washer; 5. Flat washer; 6. Snap ring. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings: Example 1

[0017] like Figures 1-4 The aforementioned spring-loaded anti-loosening screw fastener includes a screw body 1, on which a working thread 11, a working vertical tooth 12, and a retaining ring groove 13 are sequentially arranged along the length direction, and the working vertical tooth 12 is evenly distributed along the circumference of the screw. Nut 2, the inner wall of nut 2 is provided with a working internal thread that meshes with the working thread 11, and the end face of nut 2 is provided with a plurality of axial grooves 21 distributed circumferentially; 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 11. The end face of the cap body 31 is provided with a fastening protrusion key 33 that corresponds to the axial groove 21 of the nut 2. Spring pad 4, which is in the shape of a corrugated spring, is used to limit the anti-loosening cap 3 during assembly; Flat pad 5, which is circular, is used to limit the spring pad 4 during assembly; The retaining ring 6, which cooperates with the retaining ring groove 13, is used to fasten the flat gasket 5.

[0018] In a preferred embodiment, the wave crests of the elastic pad 4 have an arc-shaped transition, and the wave crests are set to be multiple and evenly distributed along the circumference of the elastic pad 4.

[0019] In a preferred embodiment, the hollow inner diameter of the flat pad 5 is the same as the hollow inner diameter of the spring pad 4.

[0020] Example 2

[0021] like Figure 5 The difference between this embodiment and Embodiment 1 is that the screw body 1 does not include a screw head. In Embodiment 1, the screw body 1 includes a screw head, and the working thread 11 is provided on the side close to the screw head.

[0022] In summary, the corrugated spring clip can provide continuous and uniform top pressure, effectively compensate for the gaps caused by vibration, and avoid relative displacement caused by hard impact between components; the anti-loosening vertical teeth of the anti-loosening cap increase the frictional resistance, further prevent accidental rotation, facilitate installation, and achieve efficient fastening. It 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.

[0023] 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 spring-loaded anti-loosening screw fastener, characterized in that, The screw body includes a screw body, on which working threads, working vertical teeth and retaining ring grooves 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 number of axial grooves are distributed circumferentially on the end face of the nut. 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 the end face of the cap body is provided with a fastening protrusion key that corresponds to the axial groove of the nut; A spring pad, which is in the shape of a corrugated spring, is used to limit the anti-loosening cap during assembly; A flat pad, which is circular in shape, is used to limit the position of the spring pad during assembly; A retaining ring, which engages with a retaining ring groove, is used to fasten the flat gasket.

2. The anti-loosening screw fastener according to claim 1, characterized in that, The wave crests of the elastic pad have a circular arc transition, and the wave crests are set in multiple ways and evenly distributed along the circumference of the elastic pad.

3. The anti-loosening screw fastener according to claim 2, characterized in that, The hollow inner diameter of the flat pad is the same as the hollow inner diameter of the spring pad.

4. 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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