Composite non-slip washer

Abstract

The utility model discloses a kind of composite antiskid washers, belong to mechanical fastener technical field.The washer includes upper layer wavy metal sheet and lower elastic rubber layer.The metal sheet surface is equipped with antiskid microtooth, and its edge is equipped with the flanging of rubber layer side edge covering;Metal sheet lower surface is equipped with anchoring protrusion, and the upper surface of elastic rubber layer is equipped with corresponding anchoring groove, and the both are embedded and form mechanical interlock.The utility model passes through metal-rubber composite structure, combines the strength of metal and the elasticity of rubber, can effectively absorb vibration and impact;The antiskid microtooth on surface greatly increases friction, thereby significantly prevent bolt nut loosening.The washer structure is firm, and the anti-loose performance is excellent, and durability is good, suitable for heavy machinery, rail transportation and other high load, high vibration occasions.

Description

Technical Field

[0001] This utility model relates to the field of mechanical fastener technology, specifically to a composite anti-slip washer for preventing bolts or nuts from loosening. Background Technology

[0002] In high-load, high-vibration applications such as heavy machinery, rail transportation, bridge construction, and aerospace, the reliability of bolted connections is crucial. Bolts and nuts are prone to loosening under long-term vibration and impact loads, leading to connection failure and potentially serious safety accidents. Common methods to prevent loosening include using spring washers, double nuts, and thread-locking adhesive.

[0003] Spring washers offer limited preload and are prone to failure due to loss of elasticity under vibration; double nuts increase weight and installation space, and require precise control of preload; thread-locking adhesives suffer from curing time, difficulty in disassembly, and aging issues. Furthermore, traditional flat washers only increase contact area and distribute pressure, offering negligible anti-loosening effect.

[0004] Therefore, there is an urgent need for an anti-slip washer that combines high strength, high elasticity, high anti-slip performance, stable structure, and good durability to overcome the shortcomings of the existing technology. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, this utility model aims to provide a composite anti-slip washer with anti-loosening, vibration reduction, and impact resistance properties, as well as a robust structure and long service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] A composite anti-slip washer includes an upper corrugated metal sheet and a lower elastic rubber layer. The surface of the metal sheet is provided with anti-slip micro-tooths, and its edge has a downward-facing flange that covers the side edge of the elastic rubber layer, forming an integral sealing structure. The corrugated shape of the metal sheet is a continuous sine wave or sawtooth wave, with a wave height of 0.1-0.5 mm and a wave pitch of 1-3 mm. To achieve a firm bond between the metal sheet and the rubber layer, the lower surface of the metal sheet has downward-facing anchoring protrusions, and the upper surface of the elastic rubber layer has anchoring grooves that match the shape of the anchoring protrusions. The anchoring protrusions are embedded in the anchoring grooves, forming a mechanical interlock.

[0008] Preferably, the lower surface of the elastic rubber layer is provided with a grid-like or corrugated anti-slip pattern with a depth of 0.1-0.3 mm to enhance the friction with the surface of the connector.

[0009] Preferably, an intermediate reinforcing layer is provided between the metal sheet and the elastic rubber layer. The intermediate reinforcing layer is a metal mesh or fiber braided layer with a thickness of 0.05-0.15 mm. The anchoring protrusions of the metal sheet pass through the mesh of the intermediate reinforcing layer and are embedded in the anchoring grooves of the elastic rubber layer, so that the three-layer structure is tightly combined.

[0010] Preferably, the metal sheet is made of stainless steel or spring steel, and the top of the anti-slip micro-teeth is embedded with a wear-resistant block made of a material with a hardness higher than that of the metal body (such as ceramic or hard alloy) to significantly improve the wear resistance of the micro-teeth.

[0011] Preferably, conductive particles (such as silver powder or carbon fiber) are uniformly dispersed within the elastic rubber layer, giving the gasket conductive properties, making it suitable for applications requiring grounding or anti-static properties.

[0012] Compared with the prior art, the present invention has the following advantages: 1. Superior Anti-loosening Performance: This invention combines the strength of metal with the elasticity of rubber. The upper corrugated metal sheet itself possesses a certain degree of elasticity, providing continuous preload; the anti-slip micro-tooths on the surface "bite" into the bolt / nut and the surface of the connected parts, greatly increasing static friction and preventing relative slippage at the source. The lower elastic rubber layer further increases the coefficient of friction. This dual anti-loosening mechanism of "metal micro-tooth anti-slip + rubber elastic compression" is far more effective than washers made of single materials.

[0013] 2. Excellent vibration reduction and buffering effect: The middle elastic rubber layer is an excellent damping material that can effectively absorb and dissipate the energy generated by vibration and impact, preventing vibration energy from being transmitted to the threaded pair, thereby significantly reducing the risk of nut loosening due to vibration. The corrugated metal sheet also participates in deformation and energy absorption, further enhancing the overall vibration resistance.

[0014] 3. Robust interlayer bonding and long service life: Through a mechanical interlocking structure of "anchoring protrusions-anchoring grooves" and a design that covers the side edges, the metal layer and rubber layer achieve a strong physical bond, preventing failure caused by interlayer delamination during long-term use. The addition of an intermediate reinforcing layer effectively improves the gasket's tensile strength and tear resistance. The wear-resistant block design on the top of the micro-tooth addresses the technical challenge of easy wear of the micro-tooth, ensuring the durability of its anti-slip performance.

[0015] 4. Multifunctionality and wide applicability: Different rubber materials with varying properties (such as oil resistance and high-temperature resistance) can be selected as needed, and conductivity can be added, expanding its application in electronic equipment, flammable and explosive environments, and other special environments. This gasket has a compact structure, is easy to install, and is suitable for various demanding anti-loosening applications. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the composite anti-slip washer of this utility model; Figure 2 This is a frontal view of the structure. Figure 3 Diagram of the cross-sectional structure of the anti-slip micro-tooth pattern; Figure 4 This is a diagram of the elastic rubber layer structure; Figure 5 This is a bottom view of the elastic rubber layer; Figure 6 This is a structural diagram of the connection point of the intermediate reinforcement layer.

[0017] Explanation of annotations in the diagram: 1. Metal sheet; 11. Anti-slip micro-tooth; 111. Wear-resistant block; 12. Flanged edge; 13. Anchoring protrusion; 2. Elastic rubber layer; 21. Anti-slip texture; 22. Conductive particles; 23. Anchoring groove; 3. Intermediate reinforcement layer. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] Example 1 like Figures 1 to 5 As shown, this embodiment provides a composite anti-slip washer. The washer is composed of an upper corrugated metal sheet 1 and a lower elastic rubber layer 2. The metal sheet 1 is preferably made of 65Mn spring steel, and its surface is stamped with conical anti-slip micro-teeth 11 with a height of 0.2mm, which are evenly distributed radially. The edges of the metal sheet 1 are stamped to form downwardly bent flanges 12, completely covering the side edges of the elastic rubber layer 2.

[0020] The metal sheet 1 is processed into a continuous wave shape with a wave pitch of 2 mm and a wave height of 0.3 mm. Multiple downward-protruding cylindrical anchoring protrusions 13 are stamped onto its lower surface. Correspondingly, anchoring grooves 23, matching the position and size of the anchoring protrusions 13, are molded onto the upper surface of the elastic rubber layer 2 (in this embodiment, nitrile rubber with a Shore hardness of 60A). During the lamination process, the anchoring protrusions 13 are completely embedded within the anchoring grooves 23, forming a strong mechanical lock to prevent interlayer separation. The lower surface of the elastic rubber layer 2 is molded with a grid-like anti-slip texture 21 with a depth of 0.2 mm.

[0021] In use, the washer is placed between the bolt / nut and the connected parts. When the nut is tightened, the corrugated metal sheet 1 undergoes elastic deformation, storing preload; the anti-slip micro-teeth 11 are embedded in the contact surface, providing extremely high anti-slip resistance. At the same time, the lower elastic rubber layer 2 is compressed, which increases friction and also acts as a buffer and damper for vibration.

[0022] Example 2 like Figure 6 As shown, this embodiment is an optimization based on embodiment 1. A 0.1mm thick stainless steel mesh is added as an intermediate reinforcing layer 3 between the metal sheet 1 and the elastic rubber layer 2. The anchoring protrusions 13 on the lower surface of the metal sheet 1 pass through the mesh of the metal mesh during the bonding process and are then embedded in the anchoring grooves 23 of the elastic rubber layer 2, so that the three-layer structure is firmly combined into one, greatly enhancing the integrity and tensile strength of the gasket.

[0023] Furthermore, during the preparation of the elastic rubber layer 2, a certain proportion of carbon fiber is uniformly mixed into the nitrile rubber compound as conductive particles 22. This gives the manufactured gasket stable conductivity, making it suitable for use in equipment connections requiring anti-static or grounding properties.

[0024] Meanwhile, tiny tungsten carbide wear-resistant blocks 111 are embedded in the top of the anti-slip micro-teeth 11 through micro-spot welding, which greatly improves the hardness and wear resistance of the micro-teeth, so that the washer can still maintain excellent anti-slip performance under frequent disassembly or long-term vibration.

[0025] In summary, this utility model, through structural design, organically combines the advantages of different materials to provide a high-performance washer with excellent anti-loosening performance, high durability, and expandable functions, effectively solving the problem of fastener loosening under high load vibration environment.

[0026] The above embodiments are preferred embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A composite anti-slip washer, characterized in that, It includes an upper wavy metal sheet (1) and a lower elastic rubber layer (2). The surface of the metal sheet (1) is provided with anti-slip micro-tooth (11), and the edge of the metal sheet is provided with a downward flange (12). The flange (12) covers the side edge of the elastic rubber layer (2). The wavy shape of the metal sheet (1) is a continuous sine wave or sawtooth wave with a wave height of 0.1-0.5 mm and a wave pitch of 1-3 mm. The lower surface of the metal sheet (1) is provided with a downward anchoring protrusion (13), and the upper surface of the elastic rubber layer (2) is provided with an anchoring groove (23) that matches the shape of the anchoring protrusion (13). The anchoring protrusion (13) is embedded in the anchoring groove (23).

2. The composite anti-slip washer according to claim 1, characterized in that, The lower surface of the elastic rubber layer (2) is provided with anti-slip texture (21), which is grid-like or wavy and has a depth of 0.1-0.3 mm.

3. The composite anti-slip washer according to claim 1, characterized in that, An intermediate reinforcing layer (3) is provided between the metal sheet (1) and the elastic rubber layer (2). The intermediate reinforcing layer (3) is a metal mesh or fiber braided layer with a thickness of 0.05-0.15 mm. The anchoring protrusion (13) of the metal sheet (1) passes through the mesh of the intermediate reinforcing layer (3) and is embedded in the anchoring groove (23) of the elastic rubber layer (2).

4. The composite anti-slip washer according to claim 1, characterized in that, The metal sheet (1) is made of stainless steel or spring steel, and the top of the anti-slip micro-tooth (11) is embedded with a wear-resistant block (111), which is made of a material with a hardness higher than that of the metal body.

5. A composite anti-slip washer according to claim 1 or 2, characterized in that, Conductive particles (22) are uniformly dispersed within the elastic rubber layer (2).

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