Lock washer and anti-loosening fastening assembly

Abstract

The utility model provides an anti-loosing washer and an anti-loosing fastening assembly, the anti-loosing washer comprises a ring-shaped washer body, the inner side wall of the washer body is provided with a protruding positioning protrusion, the inner side wall of the washer body is provided with a limiting part which tilts towards the inner side and the axial side of the washer body, and the limiting part is provided with a positioning groove. Disconnection grooves are formed in the gasket body on the two sides of the limiting part. The positioning protrusion is matched with the positioning groove, the effect of preventing the bolt from rotating in the circumferential direction can be achieved, the limiting part enters the threaded structure of the bolt, and the limiting part abuts against the threaded structure, so that the effect of preventing the bolt from moving in the axial direction can be achieved.

Description

Technical Field

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

[0002] Nuts and bolts are commonly used fasteners used to fix two parts together. In order to prevent loosening, washers are usually provided. The washers are in contact with the nuts to form friction resistance to prevent the nuts from loosening.

[0003] However, when the connection between the bolt and the nut becomes loose, not only the nut will loosen and rotate, but the bolt will also loosen and rotate, and the existing gasket cannot directly prevent the bolt from rotating.

[0004] In order to solve the above technical problems, there is a bolt and nut fastener in the prior art, referring to Figure 1 As shown: bolt 01, nut 02, washer 03. A positioning groove 04 is provided on the bolt 01 along its length direction, and a positioning protrusion 05 is provided on the inner side of the washer 03. The positioning protrusion 05 cooperates with the positioning groove 04 to lock the bolt 01 and prevent the bolt 01 from rotating.

[0005] However, the loosening of the bolt 01 is not only rotation, but also axial movement. The above-mentioned washer cannot prevent the axial loosening of the bolt 01. Utility Model Content

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

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

[0008] A loose-proof gasket comprises a circular gasket body, the inner side wall of which is provided with a protruding positioning protrusion, the inner side wall of which is provided with a limiting portion which is tilted toward the inner side and one side of the gasket body in an axial direction, and the gasket body on both sides of the limiting portion is provided with a disconnection groove.

[0009] The utility model is further configured that a plurality of the limiting parts are provided, and the plurality of limiting parts are arranged at intervals in the circumferential direction of the gasket body.

[0010] The utility model is further configured that four limiting parts are provided, and the four limiting parts are arranged at equal intervals in the circumferential direction of the gasket body.

[0011] An anti-loosening fastening assembly comprises a bolt, a nut and a washer are connected to the bolt, a positioning groove is provided on the bolt along its axial direction, the washer is the above-mentioned anti-loosening washer, and the positioning protrusion is connected in the positioning groove.

[0012] The utility model is further configured such that the inner diameter of the washer body is greater than the diameter of the screw rod of the bolt.

[0013] The utility model is further configured such that the positioning protrusion is abutted against the bottom of the positioning groove.

[0014] The utility model is further configured that the outer side of the end portion of the limiting portion is provided with a chamfer.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are as follows:

[0016] The anti-loosening washer and anti-loosening fastening assembly provided by the utility model, wherein the positioning protrusion cooperates with the positioning groove to prevent the circumferential rotation of the bolt, and the limiting portion enters into the threaded structure of the bolt, and the limiting portion and the threaded structure abut against each other to prevent the axial movement of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 It is a structural schematic diagram of the prior art.

[0019] Figure 2 The structure diagram of the utility model anti-loosening washer Figure 1 .

[0020] Figure 3 The structure diagram of the utility model anti-loosening washer Figure 2 .

[0021] Figure 4 It is a structural schematic diagram of the anti-loosening fastening component of the utility model. DETAILED DESCRIPTION

[0022] 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.

[0023] For reference Figure 1-4 The utility model is described as follows:

[0024] Embodiment 1: An anti-loosening fastening assembly includes a bolt 01, wherein the bolt 01 includes a screw rod and a screw head, the screw rod is provided with an external thread, a nut 02 and a washer are connected to the bolt 01, an internal thread is provided on the inner side of the nut 02, the nut 02 is threadedly connected to the screw rod, the washer is sleeved on the screw rod, and a positioning groove 04 is provided on the screw rod of the bolt 01 along its axial direction, and the positioning groove 04 is arranged through the end of the screw rod.

[0025] The washer comprises a circular washer body 1, on the inner side wall of the washer body 1 is provided a protruding positioning protrusion 05, the positioning protrusion 05 and the washer body 1 are integrally arranged, on the inner side wall of the washer body 1 is provided a limiting portion 3 that is tilted toward the inner side and one side of the axial direction of the washer body 1, the limiting portion 3 and the washer body 1 are integrally arranged, the washer body 1 on both sides of the limiting portion 3 is provided with a disconnection groove 4, the setting of the disconnection groove 4 makes it easier for the limiting portion 3 to deform, when the washer body 1 is sleeved on the screw, the limiting portion 3 is elastically clamped on the screw, there are four limiting portions 3, the four limiting portions 3 are arranged at equal intervals in the circumferential direction of the washer body 1, and the limiting portion 3 is staggered with the positioning protrusion 05. When the nut 02 is tightened on the screw, the nut 02 will form an extrusion on the limiting portion 3, pressing the limiting portion 3 toward the screw, so that the limiting portion 3 is clamped on the screw, and at the same time the limiting portion 3 enters the threaded structure on the screw and abuts against the threaded structure, forming a restriction on the bolt.

[0026] The inner diameter of the washer body 1 is larger than the diameter of the screw rod of the bolt 01 , and this setting is equivalent to providing a space for the limiting portion 3 at the retention location.

[0027] The positioning protrusion 05 is abutted against the bottom of the positioning groove 04 , thereby locating the positions of the washer body 1 and the bolt 01 .

[0028] The outer side of the end of the limiting portion 3 is provided with a chamfer 6 . When the nut 02 is tightened, the chamfer 6 plays a role in guiding the nut 02 so that the limiting portion 3 enters between the bolt 01 and the nut 02 .

[0029] 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 locking washer, comprising a circular washer body (1), wherein the inner side wall of the washer body (1) is provided with a protruding positioning protrusion (05), characterized in that: A limiting portion (3) is provided on the inner side wall of the gasket body (1) and is tilted toward the inner side and one side of the axial direction of the gasket body (1), and disconnection grooves (4) are provided on the gasket body (1) on both sides of the limiting portion (3).

2. The anti-loosening washer according to claim 1, characterized in that: There are a plurality of the limiting parts (3), and the plurality of limiting parts (3) are arranged at intervals in the circumferential direction of the gasket body (1).

3. The anti-loosening washer according to claim 2, characterized in that: There are four limiting portions (3), and the four limiting portions (3) are arranged at equal intervals in the circumferential direction of the gasket body (1).

4. An anti-loosening fastening assembly, comprising a bolt (01), a nut (02) and a washer connected to the bolt (01), a positioning groove (04) being provided on the bolt (01) along its axial direction, characterized in that: The washer is the anti-loosening washer according to any one of claims 1 to 3, and the positioning protrusion (05) is connected to the positioning groove (04).

5. The anti-loosening fastening assembly according to claim 4, characterized in that: The inner diameter of the washer body (1) is greater than the diameter of the screw rod of the bolt (01).

6. The anti-loosening fastening assembly according to claim 4, characterized in that: The positioning protrusion (05) is abutted against the bottom of the positioning groove (04).

7. The anti-loosening fastening assembly according to claim 4, characterized in that: The outer side of the end of the limiting portion (3) is provided with a chamfer (6).

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