Convex-concave matching type double overlapping self-locking washer

Abstract

The utility model relates to the field of fastener, concretely is a convex concave cooperation type double stack self -locking washer. It includes the washer one and washer two of coaxial convex concave cooperation, and the washer one has the tooth surface one to the one end of axially far away washer two, has the rotation cooperation part no.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, and in particular to a double-layered self-locking washer with a convex-concave fit. 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 double-layered self-locking washer with a convex-concave fit. This washer improves the anti-loosening performance of the threaded connection by suppressing the radial slippage of the nut, without increasing the disassembly torque, making the threaded connection easy to disassemble while providing an anti-loosening effect.

[0005] The technical solution of this utility model is a double-layered self-locking washer with a convex-concave fit, including a washer 1 and a washer 2 with a coaxial convex-concave fit. 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 rotating fit part 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 rotating fit part 2 that fits with the rotating fit part 1.

[0006] Preferably, the rotating mating part includes an inner annular surface, a convex annular surface, and an outer annular surface connected sequentially from the inside to the outside. The convex annular surface has a circular structure and its cross-sectional profile is semi-circular, rectangular, triangular, or trapezoidal.

[0007] Preferably, the rotating fitting part two includes an inner annular surface two, an inner concave surface and an outer annular surface two connected sequentially from the inside to the outside. The inner concave surface and the convex annular surface are in a convex-concave fit. The inner concave surface has a circular annular structure and its cross-section is a semi-circle, rectangle, triangle or trapezoid that matches the convex annular surface.

[0008] Preferably, the washer has an inner circumferential surface coaxially distributed in the middle and an outer circumferential surface coaxially distributed in the periphery.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] Preferably, the area of ​​inclined plane one is smaller than the area of ​​inclined plane two.

[0013] 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.

[0014] 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.

[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 convex annular surface of washer one and the concave surface of washer two are mutually convex and concave, suppressing the radial slippage of each other, thereby achieving the anti-loosening effect, but does not restrict the relative rotation of washer one and washer two, and does not increase 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. Convex annular surface; 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. Concave surface; 243. Outer annular surface 2. Detailed Implementation

[0023] like Figures 1-5 As shown, this embodiment proposes a double-layered self-locking washer with a convex-concave fit, including a washer 1 and a washer 2 with a coaxial convex-concave fit. The end of washer 1 axially away from washer 2 has a toothed surface 13, and the other end has a coaxially distributed rotating engagement portion 1. The end of washer 2 axially away from washer 1 has a toothed surface 23, and the other end has a rotating engagement portion 2 that fits against the rotating engagement portion 1. Washers 1 and 2 are positioned and overlapped through the rotating engagement portions 1 and 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, the first rotating mating part includes an inner annular surface 141, a convex annular surface 142, and an outer annular surface 143 connected sequentially from the inside to the outside. The convex annular surface 142 has a circular structure and a cross-sectional profile that is semi-circular, rectangular, triangular, or trapezoidal, or other shapes. The convex annular surface 142 is formed by sweeping a generatrix around the central axis of the washer 1. The inner annular surface 141 and the outer annular surface 143 are coplanar. The second rotating mating part includes an inner annular surface 241, a concave surface 242, and an outer annular surface 243 connected sequentially from the inside to the outside. The concave surface 242 has a convex-concave fit with the convex annular surface 142. The concave surface 242 has a circular structure and a cross-section that matches the convex annular surface 142, which is semi-circular, rectangular, triangular, or trapezoidal, or other shapes that can achieve a match. The concave surface 242 is formed by sweeping a generatrix around the central axis of the washer 2. The inner annular surface 241 and the outer annular surface 243 are coplanar. After washer 1 and washer 2 are installed in place, inner annular surface 141 and inner annular surface 241 are fitted together, convex annular surface 142 and concave annular surface 242 are fitted together, and outer annular surface 143 and outer annular surface 243 are fitted together. The convex annular surface 142 and concave annular surface 242 are arranged in a convex-concave fit, allowing relative rotation between them without increasing the torque required for 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 double-layer self-locking washer with a convex-concave fit 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 convex annular surface 142 of washer 1 and the concave surface 242 of washer 2 are in mutual convex-concave fit, which inhibits the radial slippage of each other, thereby inhibiting the relative slippage between the nut and the clamped part 1, and 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 double-layered self-locking washer with a convex-concave fit, characterized in that, The device includes a coaxial convex-concave fit washer 1 (1) and a washer 2 (2). The washer 1 (1) has a toothed surface 1 (13) at one end axially away from the washer 2 (2) and a rotating fit part 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 rotating fit part 2 at the other end that fits with the rotating fit part 1. The rotating fit part 1 includes an inner annular surface 1 (141), a convex annular surface (142), and an outer annular surface connected sequentially from the inside to the outside.

1. The convex annular surface (142) has a circular structure and a cross-sectional profile of semicircle, rectangle, triangle or trapezoid. The rotating fitting part 2 includes an inner annular surface 2 (241), an inner concave surface (242) and an outer annular surface 2 (243) connected sequentially from the inside to the outside. The inner concave surface (242) and the convex annular surface (142) are in a convex-concave fit. The inner concave surface (242) has a circular structure and a cross-section that matches the convex annular surface (142) as a semicircle, rectangle, triangle or trapezoid.

2. The double-layered self-locking washer of convex-concave mating type according to claim 1, characterized in that, Washer 1 (1) has an inner circumferential surface 1 (11) with coaxial distribution in the middle and an outer circumferential surface 1 (12) with coaxial distribution in the outer periphery.

3. The double-layered self-locking washer of convex-concave mating type 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 double-layered self-locking washer with a convex-concave fit as described in 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 double-layered self-locking washer with a convex-concave fit as described in claim 4, characterized in that, The toothed module includes inclined surface one (131) and inclined surface two (132) with one end of inclined surface one (131) and one end of inclined surface two (132) connected.

6. A double-layered self-locking washer with a convex-concave fit as described in claim 5, characterized in that, The area of ​​inclined plane 1 (131) is smaller than the area of ​​inclined plane 2 (132).

7. A double-layered self-locking washer with a convex-concave fit as described in 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 double-layered self-locking washer with a convex-concave fit as described in 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.

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