Combined lock washer

Abstract

The invention provides a combined lock washer, comprising a first washer and a second washer, wherein the first washer is circular lamellar and has a central through hole, the size of the central through hole adapts to the size of a bolt for the lock washer. The second washer and the first washer are of the same size and shape. The first washer and the second washer are bound together, two surfaces where the two washers are in contact to each other are respectively provided with interlaced radial sawteeth, and the two washers are closely meshed together by the sawteeth on the contact surfaces. The sawteeth on the contact surfaces are respectively formed in the shape of two planes, one plane is perpendicular to the reference plane, the included angle between the other plane and the reference plane is greater than an angle of thread of the bolt for the combined lock washer, and the reference plane is the plane where the contact surfaces of the first washer and the second washer are located. The sawteeth on the contact surfaces are arranged anticlockwise. The outer surfaces where the first washer and the second washer are not in contact to each other are respectively provided with tiny radial sawteeth, and the sawteeth on the outer surfaces are arranged clockwise.

Description

technical field [0001] The invention relates to an anti-loosening washer, in particular to a combined anti-loosening washer. Background technique [0002] Lock washers are parts placed between nuts and bolts. It is generally used to protect the surface of the bolt from being scratched by the nut, to disperse the pressure of the nut on the bolt, and to prevent the nut and the bolt from loosening each other. Now the common anti-loosening washers mainly achieve the purpose of anti-loosening by increasing the friction force. There are two main ways to increase the friction force: [0003] 1. Increase the friction coefficient of the lock washer, that is, increase its surface roughness, such as adding various patterns on its surface. [0004] 2. Process the gasket into a disc shape and make it elastic to a certain extent through heat treatment. After the disc washer is installed, there is a certain tension force, which is applied to the threads of the two connecting parts, incr...

AI Technical Summary

Problems solved by technology

[0006] 1. The existing technology only simply increases the friction force. After repeated disassembly, the surface pattern is easy to be ground, resulting in a decrease in friction force and a corresponding weakening of the anti-loosening effect;

[0007] 2. After repeated disassembly of the dish gasket, there will be a corresponding degree of wear and tear, resulting in a reduction in the effective height, thereby reducing the tension force and the anti-loosening effect

[0008] 3. The existing technology is used in ordinary environments and can basically meet the requirements, but it is difficult to be suitable if the environment is harsh, the vibration intensity is high, and the anti-corrosion requirements are high.

Images