Anti-loosening thread fastening kit easy to manufacture in batch

Abstract

The utility model discloses an anti-loosening thread fastening kit easy to manufacture in batches. The anti-loosening thread fastening kit comprises a bolt, a nut and an elastic gasket. A positioning groove is formed in the bolt in the axial direction. A plurality of anti-skid teeth which are rotationally and symmetrically distributed are densely distributed on at least one end surface of the nut; the inner ring of the elastic gasket is provided with a positioning block matched with the positioning groove, the elastic gasket is a ring-shaped special-shaped gasket B, the circumferential surface of the gasket B is provided with at least one radial slot in the radial direction of the gasket B, and the length of the radial slot is smaller than the width of the ring part of the gasket B; a circumferential opening seam is formed in one side of the gasket in the circumferential direction from the bottom of the radial opening seam as a starting point, strip-shaped parts separated by L-shaped opening seams formed by the radial opening seam and the circumferential opening seam form elastic warped pieces, and the elastic warped pieces are obliquely turned up at a sharp angle in the direction of the same face of the gasket B; and the gasket B is formed by punching a plate with the same thickness at one time. The reliability is higher, and the production cost is lower.

Description

Technical Field

[0001] The utility model belongs to the technical field of standard parts and relates to an anti-loosening thread fastening kit which is easy to manufacture in batches. Background Art

[0002] Threaded fastening kits are the most important category of standard parts and are widely used in various fields. Standardized threaded fastening kits have many series of products, usually including matching bolts, nuts, and washers.

[0003] While threaded fasteners using this technology can certainly function normally in a variety of conventional applications, they are not suitable for applications with frequent and high vibration levels, such as those on train tracks, where reliability is critical. Specifically designed anti-loosening threaded fasteners are required. Due to the high volume and high requirements, whether these fasteners are suitable, while meeting the rigid anti-loosening technical requirements, must also consider manufacturing costs and reliability.

[0004] For example, the technical solution disclosed in the Chinese patent application with application number: 202311041621.X, entitled “An Improved Anti-Loosening Thread Fastening Kit”, has a structure as follows: Figure 1 、 Figure 2 、 Figure 3 As shown, it includes a bolt 6, a nut 3, and a gasket A 1A; a positioning groove 5 is provided on the bolt 6 along the axial direction; a plurality of anti-slip teeth 4 are densely distributed in rotational symmetry on the end face of the nut 3; the gasket A 1A is a C-shaped special-shaped elastic gasket, and a positioning block 7 is provided on the inner ring of the gasket A 1A opposite to the notch of C, which is adapted to the positioning groove 5. The gasket A 1A is segmented into three arc-shaped segments, and the two segments near the notch of C are segment A 8a and segment B 8b, and the third segment is a thick segment; the thickness of segment A 8a and segment B 8b are both less than the thickness of the thick segment; the top surface of segment A 8a is flush with the top surface of the thick segment, and the top surface of segment A 8a is provided with at least one row of A clamping teeth 2a near the notch of C; the bottom surface of segment B 8b is flush with the bottom surface of the thick segment, and the bottom surface of segment B 8b is provided with at least one row of B clamping teeth 2b near the notch of C.

[0005] The anti-loosening thread fastening kit using such technology can certainly achieve the technical purpose of preventing loosening, but it has the following shortcomings:

[0006] A. Since the first and second latch teeth 2a and 2b are located on both ends of the gasket 1A, the force is uneven during locking or removal. In the same installation state, only the latch teeth on one side can prevent loosening. In addition, the gasket 1A has a completely notched C-shaped structure. It is easy to deform and break after long-term use due to strong vibration, and its reliability is not high enough.

[0007] B. Since the structure of gasket A 1A is relatively complex, although it can be processed, it is difficult to form it in one go by using a traditional continuous stamping process using plates of uniform thickness due to the different thicknesses of its various parts, resulting in a relatively high production cost.

[0008] In summary, the reliability of the existing technology is not high enough, the production cost is relatively high, and the use effect is not ideal enough. Utility Model Content

[0009] In order to overcome the shortcomings of the prior art, the utility model provides an anti-loosening thread fastening kit that is easy to mass-produce, has higher reliability and lower production cost.

[0010] The technical solution adopted by the utility model to achieve the above-mentioned technical purpose is: an anti-loosening threaded fastening kit that is easy to mass-produce, including a bolt, a nut, and an elastic gasket; a positioning groove is opened axially on the bolt; a plurality of anti-slip teeth with rotational symmetrical distribution are densely distributed on the end face of at least one of the nuts; a positioning block adapted to the positioning groove is provided on the inner ring of the elastic gasket, and the elastic gasket is a circular annular special-shaped gasket B, and the circumferential surface of the gasket B is opened along the radial direction of the gasket with at least one radial slit with a slit length less than the width of the ring portion of the gasket B, and a circumferential slit is opened along one side of the circumference of the gasket starting from the bottom of the radial slit, and the strip portion separated by the L-shaped slit formed by the radial slit and the circumferential slit constitutes an elastic flap, and the elastic flap is tilted up at an acute angle toward the same side of the gasket B; the gasket B is formed by one-time stamping of a plate of equal thickness.

[0011] There are four L-shaped slits, and the four corresponding elastic flaps are rotationally symmetrically arranged along the central axis of the B gasket.

[0012] The plate pieces of equal thickness are steel coils.

[0013] The beneficial effects of the utility model are: due to the adoption of the above technical solution, the reliability is higher, the production cost is lower, and the use effect is more ideal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 is a schematic diagram of a prior art anti-loosening thread fastening kit;

[0016] Figure 2 1. It is a schematic diagram of another view of the prior art anti-loosening thread fastening kit;

[0017] Figure 3 It is a schematic diagram of a gasket portion in the prior art;

[0018] Figure 4It is a schematic diagram of the utility model;

[0019] Figure 5 This is a schematic diagram of the second gasket part of the utility model

[0020] Figure 6 It is a schematic diagram of another viewing direction of the second gasket part in the utility model.

[0021] The reference numbers in the accompanying drawings are as follows: gasket A 1A, gasket B 1B, tooth A 2a, tooth B 2b, nut 3, anti-slip tooth 4, positioning groove 5, bolt 6, positioning block 7, segment A 8a, segment B 8b, elastic flap K, radial slit J, circumferential slit Z DETAILED DESCRIPTION

[0022] The embodiments of the present utility model are as follows: Figures 4 to 6 As shown, an anti-loosening threaded fastening kit that is easy to mass-produce includes a bolt 6, a nut 3, and an elastic gasket; a positioning groove 5 is provided on the bolt 6 along the axial direction; a plurality of anti-slip teeth 4 with rotationally symmetrical distribution are densely distributed on at least one end face of the nut 3; a positioning block 7 is provided on the inner ring of the elastic gasket to match the positioning groove 5, and the elastic gasket is a circular annular special-shaped gasket B 1B, and the circumferential surface of the gasket B 1B is provided with at least one radial slit J with a slit length less than the width of the ring portion of the gasket B 1B along the radial direction of the gasket, and a circumferential slit Z is provided along one side of the circumference of the gasket from the bottom of the radial slit J as the starting point, and the strip portion separated by the L-shaped slit formed by the radial slit J and the circumferential slit Z constitutes an elastic flap K, and the elastic flap K is tilted up at an acute angle toward the same surface of the gasket B 1B; the gasket B 1B is formed by one-time stamping of a plate of equal thickness.

[0023] There are four L-shaped slits, and the four corresponding elastic flaps K are rotationally symmetrically arranged along the central axis of the second gasket 1B.

[0024] The plate pieces of equal thickness are steel coils.

[0025] Further description of the utility model:

[0026] In the production of the bolt 6 of the present invention, the mold needs to be changed accordingly because the positioning groove 5 needs to be punched out at the same time. The rest of the process is the same as the production process of traditional bolt parts.

[0027] In the production of the nut 3 of the present invention, the mold needs to be changed accordingly because the anti-slip teeth 4 need to be punched out at the same time. The rest of the process is the same as the production process of the traditional nut.

[0028] The second gasket 1B of the present invention is produced by using steel coils as raw materials and continuously produced on a stamping production line. When designing the mold, a combined mold is used to form the punching, bending and shaping parts in one step.

[0029] The produced bolts 6, nuts 3 and washers 1B can be heat treated in batches.

Claims

1. A threaded fastener kit for preventing loosening that is easy to mass-produce, comprising a bolt, a nut, and an elastic washer; the bolt is provided with an axially defined positioning groove; at least one end face of the nut is densely covered with a plurality of rotationally symmetrically distributed anti-slip teeth; the inner ring of the elastic washer is provided with a positioning block that matches the positioning groove, characterized in that: The elastic gasket is a circular annular special-shaped gasket B. The circumferential surface of gasket B is provided with at least one radial slit with a length less than the width of the ring portion of gasket B in the radial direction of the gasket. A circumferential slit is provided along one side of the circumference of the gasket starting from the bottom of the radial slit. The strip portion separated by the L-shaped slit formed by the radial slit and the circumferential slit constitutes an elastic flap, and the elastic flap is tilted up at an acute angle toward the same surface of gasket B. Gasket B is formed by one-time stamping of a plate of equal thickness.

2. The anti-loosening thread fastening kit that is easy to mass-produce according to claim 1, characterized in that: There are four L-shaped slits, and the four corresponding elastic flaps are rotationally symmetrically arranged along the central axis of the B gasket.

3. The anti-loosening thread fastening kit that is easy to mass-produce according to claim 2, characterized in that: The plate pieces of equal thickness are steel coils.

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