Step nesting type double stacking self-locking washer

Abstract

The utility model relates to the field of fastener, concretely is a step nest type double -stacked self -locking washer. It includes washer one and washer two of coaxially superposed distribution, and washer one has the tooth surface one to the one end of axially far away washer two, has the step department one to the other end, and washer two has the tooth surface two to the one end of axially far away washer one, has the step department two of the inosculation with step department one to the other end, the utility model discloses through the radial slip of inhibiting the nut to promote the anti -loose performance of threaded connection, and does not increase the dismounting torque.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, and in particular to a stepped nested double-layered self-locking washer. Background Technology

[0002] Threaded connections offer advantages such as low cost, easy assembly and disassembly, and high connecting force, making them widely used in machinery, transportation, and construction. However, in practical applications, due to various vibrations and impacts, threaded connections are prone to loosening. Loose threads not only reduce connecting force and lead to connection failure, but can also cause serious safety accidents in severe cases. Therefore, certain anti-loosening measures are necessary.

[0003] Double-layer self-locking washers are a commonly used type of anti-loosening fastener with excellent anti-loosening effect. Traditional double-layer self-locking washers rely on increasing the disassembly torque to prevent loosening, which, while providing an anti-loosening effect, also increases the difficulty of disassembling threaded connections. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a stepped nested double-layer self-locking washer, which improves the anti-loosening performance of the threaded connection by suppressing the radial slippage of the nut, without increasing the disassembly torque, so that the threaded connection can be easily disassembled while producing an anti-loosening effect.

[0005] The technical solution of this utility model is a stepped nested double-layer self-locking washer, which includes a washer 1 and a washer 2 coaxially stacked. The end of the washer 1 that is axially away from the washer 2 has a toothed surface 1 and the other end has a stepped portion 1. The end of the washer 2 that is axially away from the washer 1 has a toothed surface 2 and the other end has a stepped portion 2 that matches the stepped portion 1.

[0006] Preferably, the washer has an inner circumferential surface coaxially distributed in the middle and an outer circumferential surface coaxially distributed in the periphery.

[0007] Preferably, the second washer has an inner circumferential surface two coaxially distributed in the middle and an outer circumferential surface two coaxially distributed in the periphery.

[0008] Preferably, both tooth surface one and tooth surface two include multiple tooth-shaped modules that are evenly distributed in a ring, and the multiple tooth-shaped modules are connected in a ring in sequence.

[0009] Preferably, the toothed module includes inclined surface one and inclined surface two, with one end of inclined surface one and one end of inclined surface two connected.

[0010] Preferably, the area of ​​inclined plane one is smaller than the area of ​​inclined plane two.

[0011] Preferably, the connecting ends of inclined plane one and inclined plane two are intersection lines, and the extension line of the intersection line passes through the central axis of washer one and washer two.

[0012] Preferably, the plane perpendicular to the central axis of the washer is used as the reference plane, the angle between the first inclined plane and the reference plane is between 50 degrees and 70 degrees, and the angle between the second inclined plane and the reference plane is between 5 degrees and 70 degrees.

[0013] Preferably, the stepped portion includes an inner annular surface, a conical surface, and an outer annular surface connected sequentially from the inside to the outside, and the diameter of the end where the conical surface is connected to the inner annular surface is smaller than the diameter of the end where the conical surface is connected to the outer annular surface.

[0014] Preferably, the step portion two includes an inner annular surface two, a conical surface two, and an outer annular surface two connected sequentially from the inside to the outside, and the diameter of the end where the conical surface two connects to the inner annular surface two is smaller than the diameter of the end where the conical surface two connects to the outer annular surface two.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention improves the anti-loosening performance of the threaded connection by suppressing the radial slippage of the nut. The stepped portion one of washer one and the stepped portion two of washer two are nested and cooperate with each other, suppressing the radial slippage of each other, thereby achieving the anti-loosening effect, but without restricting the relative rotation of washer one and washer two, and without increasing the disassembly torque, so that the threaded connection is easy to disassemble while producing the anti-loosening effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 for Figure 1 Structural sectional view;

[0018] Figure 3 This is a structural schematic diagram of the washer from a flip-over perspective.

[0019] Figure 4 A schematic diagram of the tooth-shaped module composed of inclined plane one and inclined plane two;

[0020] Figure 5 This is a schematic diagram of the structure of washer two;

[0021] Figure 6 This is a schematic diagram of the structure of this utility model when applied to prevent bolts and nuts from loosening.

[0022] Reference numerals: 1. Washer 1; 11. Inner circumferential surface 1; 12. Outer circumferential surface 1; 13. Tooth surface 1; 131. Inclined surface 1; 1311. Intersection line; 132. Inclined surface 2; 141. Inner annular surface 1; 142. Conical surface 1; 143. Outer annular surface 1; 2. Washer 2; 21. Inner circumferential surface 2; 22. Outer circumferential surface 2; 23. Tooth surface 2; 241. Inner annular surface 2; 242. Conical surface 2; 243. Outer annular surface 2. Detailed Implementation

[0023] like Figures 1-5 As shown, this embodiment proposes a stepped nested double-layer self-locking washer, comprising washer 1 and washer 2 coaxially stacked. Washer 1 has a toothed surface 13 at one end axially away from washer 2, and a stepped portion 1 at the other end. Washer 2 has a toothed surface 23 at one end axially away from washer 1, and a stepped portion 2 at the other end that mates with stepped portion 1. Washers 1 and 2 are positioned and stacked together via stepped portion 1 and stepped portion 2, and the outer toothed surfaces 13 and 23 are used to prevent loosening. Figure 6 As shown, washers 1 and 2 are placed around the outer circumference of the bolt, and the nut is tightened so that the toothed surface 13 on the top of washer 1 is embedded in the bottom of the nut, and the toothed surface 23 on the bottom of washer 2 is embedded in the top of the clamped part, thereby achieving anti-loosening when the bolt and nut are connected.

[0024] like Figure 2 As shown, Step 1 includes an inner annular surface 141, a conical surface 142, and an outer annular surface 143 connected sequentially from the inside to the outside. The diameter of the connection end between the conical surface 142 and the inner annular surface 141 is smaller than the diameter of the connection end between the conical surface 142 and the outer annular surface 143. Step 2 includes an inner annular surface 241, a conical surface 242, and an outer annular surface 243 connected sequentially from the inside to the outside. The diameter of the connection end between the conical surface 242 and the inner annular surface 241 is smaller than the diameter of the connection end between the conical surface 242 and the outer annular surface 243. After Washer 1 and Washer 2 are installed in place, the inner annular surface 141 and the inner annular surface 241 fit together, the conical surface 142 and the conical surface 242 fit together, and the outer annular surface 143 and the outer annular surface 243 fit together. Step 1 and Step 2 are nested, but this does not affect their rotation or increase the torque during disassembly.

[0025] Washer 1 has a coaxially distributed inner circumferential surface 11 in the middle and a coaxially distributed outer circumferential surface 12 on the periphery. Washer 2 has a coaxially distributed inner circumferential surface 21 in the middle and a coaxially distributed outer circumferential surface 22 on the periphery. The bolt can pass through the inner circumferential surface 11 and the inner circumferential surface 21. The inner circumferential surface 11 and the inner circumferential surface 21 are aligned, and the outer circumferential surface 12 and the outer circumferential surface 22 are aligned, resulting in a regular overall structure.

[0026] like Figures 3-5As shown, both tooth surface 13 and tooth surface 23 include multiple tooth-shaped modules evenly distributed in a ring. Specifically, the multiple tooth-shaped modules in tooth surface 13 are evenly distributed around the central axis of washer 1, and the multiple tooth-shaped modules in tooth surface 23 are evenly distributed around the central axis of washer 2. The multiple tooth-shaped modules are connected sequentially in a ring. Each tooth-shaped module includes inclined surfaces 131 and 132. One end of inclined surface 131 is connected to one end of inclined surface 132, and the other end of inclined surface 131 is connected to one end of inclined surface 132 in an adjacent tooth-shaped module. The other end of inclined surface 132 is connected to one end of inclined surface 131 in an adjacent tooth-shaped module. The multiple tooth-shaped modules are connected to each other in a ring, and the projections of both the inner and outer circumferences are circular.

[0027] The area of ​​inclined plane 131 is smaller than that of inclined plane 132. The connection point between inclined plane 131 and inclined plane 132 is intersection line 1311. The extension line of intersection line 1311 passes through the central axis of washer 1 and washer 2, resulting in a more regular structural design. Taking the plane perpendicular to the central axis of washer 1 as the reference plane, the angle between inclined plane 131 and the reference plane is between 50 degrees and 70 degrees, and the angle between inclined plane 132 and the reference plane is between 5 degrees and 70 degrees. Within the inclination angle range of the two inclined planes, the protruding intersection line 1311 can be used to embed into the clamped part 1 or the nut, achieving an anti-loosening effect.

[0028] This embodiment improves the anti-loosening performance of the threaded connection by suppressing the radial slippage of the nut, without restricting the relative rotation of washer 1 and washer 2, and without increasing the disassembly torque, making the threaded connection easy to disassemble while providing an anti-loosening effect. After the bolt is passed through clamped part 2 and clamped part 1, washer 2 and washer 1 are put on, and then the nut is screwed on and tightened to form a preload. Under the action of the preload, clamped part 1, clamped part 2, and this stepped nested double-layer self-locking washer are clamped. The sharp corner (i.e., intersection line 1311) on the tooth surface 13 of washer 1 will be embedded into the nut material due to compression, thereby restricting the relative slippage between washer 1 and the nut. Similarly, the sharp corner (i.e., intersection line 1311) on the tooth surface 23 of washer 2 will also be embedded into the material of clamped part 1 due to compression, thereby restricting the relative slippage between washer 2 and clamped part 1. At this time, the stepped portion 1 of washer 1 and the stepped portion 2 of washer 2 nest together and inhibit each other's radial slippage, thereby inhibiting the relative slippage between the nut and the clamped part 1, thus achieving the anti-loosening effect.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A stepped nested double-layer self-locking washer, characterized in that, It includes a washer 1 (1) and a washer 2 (2) that are coaxially stacked. The washer 1 (1) has a toothed surface 1 (13) at one end axially away from the washer 2 (2) and a stepped portion 1 at the other end. The washer 2 (2) has a toothed surface 2 (23) at one end axially away from the washer 1 (1) and a stepped portion 2 that matches the stepped portion 1 at the other end.

2. The stepped nested double-layered self-locking washer according to claim 1, characterized in that, The washer (1) has an inner circumferential surface (11) with a coaxial distribution in the middle and an outer circumferential surface (12) with a coaxial distribution in the outer periphery.

3. A stepped nested double-layered self-locking washer according to claim 2, characterized in that, Washer 2 (2) has an inner circumferential surface 2 (21) coaxially distributed in the middle and an outer circumferential surface 2 (22) coaxially distributed in the outer periphery.

4. A stepped nested double-layered self-locking washer according to claim 1, characterized in that, Both tooth surface one (13) and tooth surface two (23) include multiple tooth-shaped modules that are evenly distributed in a ring, and the multiple tooth-shaped modules are connected in a ring in sequence.

5. A stepped nested double-layered self-locking washer according to claim 4, characterized in that, The toothed module includes inclined surface one (131) and inclined surface two (132) with the inclined surface one (131) connected to one end of the inclined surface two (132).

6. A stepped nested double-layered self-locking washer according to claim 5, characterized in that, The area of ​​inclined plane 1 (131) is smaller than the area of ​​inclined plane 2 (132).

7. A stepped nested double-layered self-locking washer according to claim 5, characterized in that, The connection point of inclined plane 1 (131) and inclined plane 2 (132) is the intersection line (1311), and the extension line of the intersection line (1311) passes through the central axis of washer 1 (1) and washer 2 (2).

8. A stepped nested double-layered self-locking washer according to claim 5, characterized in that, With the plane perpendicular to the central axis of washer one (1) as the reference plane, the angle between inclined plane one (131) and the reference plane is between 50 degrees and 70 degrees, and the angle between inclined plane two (132) and the reference plane is between 5 degrees and 70 degrees.

9. A stepped nested double-layered self-locking washer according to claim 1, characterized in that, The stepped part includes an inner ring surface (141), a conical surface (142), and an outer ring surface (143) connected sequentially from the inside to the outside. The diameter of the end where the conical surface (142) connects to the inner ring surface (141) is smaller than the diameter of the end where the conical surface (142) connects to the outer ring surface (143).

10. A stepped nested double-layered self-locking washer according to claim 9, characterized in that, The step section 2 includes an inner annular surface 2 (241), a conical surface 2 (242), and an outer annular surface 2 (243) connected sequentially from the inside to the outside. The diameter of the connection end between the conical surface 2 (242) and the inner annular surface 2 (241) is smaller than the diameter of the connection end between the conical surface 2 (242) and the outer annular surface 2 (243).

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