Gasket and anti-loose fastener

Abstract

The gasket comprises an annular gasket body, an annular limiting sleeve is arranged on the inner side of the gasket body, the limiting sleeve and the gasket body are coaxially arranged, and one end of the limiting sleeve is connected with the gasket body; the inner diameter of the limiting sleeve is gradually reduced from one end to the other end; the limiting sleeve is provided with a disconnecting groove. By the adoption of the technical scheme, after the nut is screwed, the limiting sleeve is pressed between the nut and the fixed part, equivalently, the nut is held on the bolt through the limiting sleeve, radial pre-tightening force is formed, and the anti-loosening purpose is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a gasket and an anti-loosening fastener. Background Art

[0002] The bolt and nut assembly consisting of a bolt body, a nut body and a washer is a commonly used fastening assembly, wherein the washer can play a role in preventing loosening.

[0003] However, in some vibration situations, the nut body and the bolt body are still prone to loosening after being matched, which can easily affect the reliable operation of the equipment.

[0004] The anti-loosening principle of existing washers is to increase the friction between the connecting parts and prevent relative movement, thereby preventing the nuts or bolts from loosening.

[0005] How to enhance the anti-loosening ability of the gasket is an issue that needs to be considered. Utility Model Content

[0006] In view of the problems pointed out in the background technology, the utility model proposes a gasket and an anti-loosening fastener to solve the above technical problems.

[0007] The technical solution of the utility model is achieved in this way:

[0008] A gasket comprises an annular gasket body.

[0009] An annular limiting sleeve is provided on the inner side of the gasket body, the limiting sleeve is coaxially arranged with the gasket body, and one end of the limiting sleeve is connected to the gasket body;

[0010] The inner diameter of the limiting sleeve gradually decreases from one end to the other end;

[0011] The limiting sleeve is provided with a disconnection groove.

[0012] The utility model is further configured that the breaking groove is provided with a plurality of them, and the plurality of breaking grooves are arranged at intervals in the circumferential direction of the limiting sleeve.

[0013] The utility model is further configured that anti-slip teeth are respectively arranged on both side surfaces of the gasket body.

[0014] An anti-loosening fastener comprises a bolt and a nut. A washer is connected to the bolt. The washer is the above-mentioned gasket. The inner diameter of the other end of the limiting sleeve is smaller than the diameter of the bolt.

[0015] The utility model is further configured that an annular extrusion groove is provided on the inner side wall of one end of the nut, and the diameter of the extrusion groove gradually decreases from the outside to the inside in the axial direction of the nut.

[0016] The utility model is further configured that a limiting strip corresponding to the breaking groove is provided on the side wall of the extrusion groove.

[0017] The utility model is further configured such that the width of the disconnecting groove is greater than the width of the limiting strip.

[0018] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0019] (1) By adopting the technical solution of the present application, after the nut is tightened, the limiting sleeve is pressed between the nut and the fixed part, which is equivalent to the nut being held on the bolt with the help of the limiting sleeve, forming a radial pre-tightening force to achieve the purpose of preventing loosening.

[0020] (2) With the technical solution of the present application, the end of the limiting sleeve separated by the breaking groove can abut against the threaded structure on the bolt, thereby preventing the bolt from withdrawing from the connecting hole on the fixed part.

[0021] (3) By adopting the technical solution of the present application, after the nut is tightened, the limiting strip on the inner wall of the nut can enter the disconnection groove, so that the limiting strip and the disconnection groove cooperate to limit the rotation of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 It is a structural schematic diagram of the utility model.

[0024] Figure 2 The utility model is shown in FIG. Figure 1 .

[0025] Figure 3 It is a cross-sectional view of the utility model.

[0026] Figure 4 For this utility model Figure 3 Enlarged view of part A in .

[0027] Figure 5 The utility model is shown in FIG. Figure 2 .

[0028] Description of the reference numerals in the accompanying drawings: gasket body 1, limiting sleeve 2, disconnection groove 3, anti-slip teeth 4, bolt 5, nut 6, extrusion groove 7, limiting strip 8. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] For reference Figure 1-5 The utility model is described as follows:

[0031] Embodiment 1: An anti-loosening fastener comprises a bolt 5 and a nut 6. A gasket is connected to the bolt 5. The gasket comprises a circular gasket body 1. Anti-skid teeth 4 are respectively arranged on both side surfaces of the gasket body 1. The anti-skid teeth 4 play the role of anti-skid and increasing friction.

[0032] A circular limiting sleeve 2 is provided on the inner side of the gasket body 1. The limiting sleeve 2 is coaxially arranged with the gasket body 1. One axial end of the limiting sleeve 2 is connected to the gasket body 1. The limiting sleeve 2 and the gasket body 1 are arranged as one body. In the axial direction of the limiting sleeve 2, the inner diameter of the limiting sleeve 2 gradually decreases from one end to the other end. A disconnection groove 3 is provided on the limiting sleeve 2. The disconnection groove 3 is arranged along the axial direction of the limiting sleeve 2. The limiting sleeve 2 runs through the inner and outer sides of the limiting sleeve 2 and the other end. There are multiple disconnection grooves 3, and multiple disconnection grooves 3 are arranged at intervals in the circumferential direction of the limiting sleeve 2.

[0033] The inner diameter of the gasket body 1 is equal to the diameter of the screw of the bolt 5, and the inner diameter of the other end of the limiting sleeve 2 is smaller than the screw diameter of the bolt 5. With this technical solution, the other end of the limiting sleeve 2 can be clamped on the screw of the bolt 5. There are six disconnection grooves 3, and the six disconnection grooves 3 divide the limiting sleeve 2 into six parts. The six parts of the limiting sleeve 2 are clamped on the screw of the bolt 5 respectively, and the ends of the six parts of the limiting sleeve 2 can be against the thread teeth on the screw.

[0034] An annular extrusion groove 7 is provided on the inner side wall of one end of the nut 6. In the axial direction of the nut 6, the diameter of the extrusion groove 7 gradually decreases from the outside to the inside. A limiting strip 8 corresponding to the disconnection groove 3 is provided on the side wall of the extrusion groove 7. The width of the disconnection groove 3 is greater than the width of the limiting strip 8. With the above technical solution, when the nut 6 is tightened, the other end of the limiting sleeve 2 can enter the extrusion groove 7. At the same time, the limiting sleeve 2 is squeezed toward the screw, so that the nut 6 is clamped on the screw with the help of the limiting sleeve 2, so that a locking force is formed in the radial direction.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gasket, comprising an annular gasket body (1), characterized in that: An annular limiting sleeve (2) is provided on the inner side of the gasket body (1), the limiting sleeve (2) is coaxially arranged with the gasket body (1), and one end of the limiting sleeve (2) is connected to the gasket body (1); The inner diameter of the limiting sleeve (2) gradually decreases from one end to the other end; The limiting sleeve (2) is provided with a disconnection groove (3).

2. A gasket according to claim 1, characterized in that: The breaking grooves (3) are provided in plurality, and the plurality of breaking grooves (3) are arranged at intervals in the circumferential direction of the limiting sleeve (2).

3. A gasket according to claim 1, characterized in that: Anti-slip teeth (4) are respectively provided on both side surfaces of the gasket body (1).

4. An anti-loosening fastener, comprising a bolt (5) and a nut (6), wherein a washer is connected to the bolt (5), characterized in that: The washer is the gasket described in any one of claims 1 to 3, and the inner diameter of the other end of the limiting sleeve (2) is smaller than the diameter of the bolt (5).

5. The anti-loosening fastener according to claim 4, characterized in that: An annular extrusion groove (7) is provided on the inner side wall of one end of the nut (6), and the diameter of the extrusion groove (7) gradually decreases from the outside to the inside in the axial direction of the nut (6).

6. The anti-loosening fastener according to claim 5, characterized in that: A limiting strip (8) corresponding to the breaking groove (3) is provided on the side wall of the extrusion groove (7).

7. The anti-loosening fastener according to claim 6, characterized in that: The width of the breaking groove (3) is greater than the width of the limiting strip (8).

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