Subject peripheral part of the disc spring, along the circumferential direction is separated form has multiple is roughly rectangular equal interval and the lateral protruding teeth in the direction of radius. In tooth root stress relaxation, the stress relaxation department has a flat department. Flat department form in the following ways: by stamping processing, for example, the circular arc or will be the root of the tooth, the edge of the processed into planar.

Application in the disc springs in the clutch mechanism of conveying machinery cases, can with the aid of stress relaxation, reduce the clutch engagement when produced in tooth root stress. And, even in the shape of the grooves of the clutch drum under the condition of sharp, also can prevent the clutch drum rotates interference of tooth and grooves, so can reduce the tooth grooves caused by wear and tear. Therefore, the disc spring can have high durability.

Disc spring is in the load on the shaft upward and a cone-shaped special spring, after the deformation under load, a certain potential energy savings, when there was a loose bolts, disc spring release part of the potential energy to keep the flange connection between the pressure to meet the sealing requirements. Disc spring uniform stress distribution from the inside out, can realize the effect of the low stroke high compensating force.