Self-centering lock washer

Abstract

The utility model relates to the field of lock washers, in particular to a self-centering lock washer. Comprising a first gasket and a second gasket, the first gasket is coaxially provided with a clamping part, and the second gasket is provided with a clamped part corresponding to the clamping part; the clamped part and the second gasket are coaxially arranged, and when the end face of the first gasket abuts against the end face of the second gasket to be assembled, the clamping part and the clamped part are clamped, so that the axis of the first gasket coincides with the axis of the second gasket. Through the arrangement of the clamping part and the clamped part, the first gasket and the second gasket can keep the same axis after being assembled.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening washers, and more particularly to an anti-loosening washer capable of self-centering. Background Technology

[0002] The anti-loosening washer consists of two washers and uses a pressure locking method. The outer surface of the washer has radial straight teeth or arc teeth, and the inner surface is a wedge-shaped surface. When the bolt is pre-tightened, one side of the outer surface wedges into the bolt head contact surface, and the other side wedges into the surface of the connecting part. The wedge-shaped surfaces of the two washers wedge and mesh, with the wedge angle "α" being greater than the thread helix angle "β". When loosened, the two washers shift, and the washer rises a distance greater than the thread rise distance, causing axial expansion and thus increasing the clamping force. This allows the device to effectively lock bolts under conditions of vibration, stress change, and temperature fluctuation.

[0003] During assembly, anti-loosening washers are bonded together with adhesive tape. Their main function is to ensure the wedge-shaped surfaces of the two inner surfaces mate properly, preventing misassembly. However, this doesn't guarantee perfect alignment after bonding. Collisions during transport can also cause misalignment, resulting in uneven contact surfaces and affecting the anti-loosening effect. Utility Model Content

[0004] The purpose of this invention is to provide a self-aligning anti-loosening washer to solve the problem that anti-loosening washers in the prior art are prone to misalignment during assembly.

[0005] The technical solution of this utility model is: a self-aligning anti-loosening washer, including a first washer and a second washer, wherein the first washer is coaxially provided with an engaging part, and the second washer is provided with a engaged part corresponding to the engaging part;

[0006] The engaging portion is coaxially arranged with the second washer, and when the end faces of the first washer and the second washer are assembled by abutting each other, the engaging portion engages with the engaging portion, so that the axis of the first washer coincides with the axis of the second washer.

[0007] Preferably, the engaging portion is configured as a discontinuous structure formed by multiple protrusions, wherein the points on the outer edges of the multiple protrusions are at the same farthest distance from the axis of the first washer and abut against the inner wall of the engaging portion.

[0008] Preferably, the engaging portion is configured as a discontinuous structure composed of multiple grooves, each groove having space that allows the engaging boss to rotate around the axis of the first washer.

[0009] Preferably, the cross-section of the engaging portion passing through the axis of the first washer is configured as a trapezoidal structure, having a radial dimension that gradually decreases in the direction away from the first washer.

[0010] Preferably, the engaging portion and the first washer are manufactured using an integral molding process.

[0011] Preferably, the end faces of the first washer and the second washer that abut against each other are provided with anti-loosening parts, the anti-loosening parts including a first locking tooth and a second locking tooth respectively fixed to the first washer and the second washer; wherein, the first locking tooth and the second locking tooth engage when the first washer and the second washer rotate relative to each other around the axial direction.

[0012] Preferably, the partial contact ends of the first and second locking teeth form a first included angle with a plane perpendicular to the axis of the first or second washer, and the first included angle is greater than the thread helix angle of the bolt used in the mating.

[0013] Preferably, the adjacent ends of the first washer and the second washer are fixed with glue during assembly.

[0014] Compared with the prior art, the advantages of this utility model are:

[0015] (1) This application provides a locking part and a locked part so that the first washer and the second washer can maintain the same axis after assembly.

[0016] (2) In some embodiments of this application, the engaging part may be formed by discontinuous bosses, thereby saving material.

[0017] (3) In some embodiments of this application, the cross section of the engaging part passing through the axis of the first washer is set as a trapezoidal structure, which increases the allowable tolerance range during manufacturing and reduces the manufacturing difficulty. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is an exploded view from a first perspective of the self-aligning anti-loosening washer described in this utility model;

[0020] Figure 2 This is an exploded view from a second perspective of the self-aligning anti-loosening washer described in this utility model;

[0021] Figure 3 This is a cross-sectional view of a self-aligning anti-loosening washer according to the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the boss described in this utility model;

[0023] Figure 5 This is a cross-sectional view of the trapezoidal engaging portion of the present invention;

[0024] Among them: 1. First washer, 2. Second washer, 3. Engaging part, 4. Engaged part, 5. Annular platform, 6. Annular groove, 7. Boss, 8. First retaining tooth, 9. Second retaining tooth. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to specific embodiments:

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, a self-aligning anti-loosening washer, used in conjunction with a bolt, is used to prevent bolt loosening. The anti-loosening washer includes a first washer 1 and a second washer 2, which are coaxially stacked. Adjacent ends of the first washer 1 and the second washer 2 are respectively provided with multiple first locking teeth 8 and corresponding second locking teeth 9 around their axes. Each first locking tooth 8 and corresponding second locking tooth 9 has two abutting ends, one of which forms a first angle with a plane perpendicular to the axis of the first washer 1, and this first angle is greater than the thread helix angle of the bolt used. When loosened, the first washer 1 and the second washer 2 move along their abutting ends, resulting in relative axial displacement. The lifting distance is greater than the thread helix distance, causing the first washer 1 to lift the bolt head, thereby increasing the clamping force and achieving bolt locking to prevent loosening.

[0027] When the first washer 1 and the second washer 2 are fixed with glue, misalignment can easily occur. Therefore, this application adopts the following structure to solve this problem.

[0028] The first washer 1 is coaxial with one end of the second washer 2 and is integrally formed with a locking part 3. The second washer 2 is provided with a locked part 4 corresponding to the locking part 3. The locked part 4 is coaxial with the second washer 2. When the end faces of the first washer 1 and the second washer 2 are abutted for assembly, the locking part 3 and the locked part 4 are engaged.

[0029] In some embodiments of this application, the engaging portion 3 and the engaged portion 4 can be configured as a continuous structure, such as... Figure 1 and Figure 2 The annular platform 5 and annular groove 6 are shown.

[0030] In other embodiments of this application, such as Figure 4 As shown, the engaging part 3 can be configured as a discontinuous structure formed by multiple segment bosses 7, and the engaging part 4 is configured as an annular groove 6.

[0031] Correspondingly, in other embodiments of this application, the engaging part 4 can also be configured as a discontinuous structure composed of multiple end grooves. In this case, it is necessary to ensure that any groove is larger than the size of the boss 7 so that it has space for the boss 7 to be engaged to rotate around the axis of the first washer 1, thereby enabling the first locking tooth 8 and the second locking tooth 9 to mesh.

[0032] Further, such as Figure 5 As shown, the cross-section of the engaging part 3 passing through the axis of the first washer 1 is set as a trapezoidal structure, with a radial dimension that gradually decreases along its own height direction. This configuration increases the dimensional requirements for the engaging part 3 and the engaged part 4 during manufacturing, allowing the engaging part 3 and the engaged part 4, which have different dimensions, to still achieve engagement.

[0033] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A self-aligning anti-loosening washer, characterized in that, It includes a first washer (1) and a second washer (2), the first washer (1) is coaxially provided with a locking part (3), and the second washer (2) is provided with a locked part (4) corresponding to the locking part (3); The engaging part (4) is coaxially arranged with the second washer (2), and when the end faces of the first washer (1) and the second washer (2) are assembled, the engaging part (3) engages with the engaging part (4), so that the axis of the first washer (1) coincides with the axis of the second washer (2); The end faces of the first washer (1) and the second washer (2) that abut against each other are provided with anti-loosening parts. The anti-loosening parts include a first locking tooth (8) and a second locking tooth (9) that are respectively fixed to the first washer (1) and the second washer (2); wherein the first locking tooth (8) and the second locking tooth (9) engage when the first washer (1) and the second washer (2) rotate relative to each other around the axial direction. The first tooth (8) and the second tooth (9) form a first angle with a plane perpendicular to the axis of the first washer (1) or the second washer (2), and the first angle is greater than the thread helix angle of the bolt used in the mating; The cross section of the engaging part (3) passing through the axis of the first washer (1) is configured as a trapezoidal structure, having a radial dimension that gradually decreases in the direction away from the first washer (1).

2. The self-aligning anti-loosening washer according to claim 1, characterized in that, The engaging part (3) is configured as a discontinuous structure formed by multiple protrusions (7). The points on the outer edge of the multiple protrusions (7) are at the same farthest distance from the axis of the first washer (1) and abut against the inner wall of the engaging part (4).

3. A self-aligning anti-loosening washer according to claim 2, characterized in that, The engaging part (4) is configured as a discontinuous structure composed of multiple grooves, each groove having space that allows the engaging boss (7) to rotate around the axis of the first washer (1).

4. A self-aligning anti-loosening washer according to claim 3, characterized in that, The engaging part (3) and the first washer (1) are made by an integral molding process.

5. A self-aligning anti-loosening washer according to claim 1, characterized in that, The adjacent ends of the first washer (1) and the second washer (2) are fixed with glue during assembly.

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