Double sealing structure of disc brake

Abstract

The invention provides a double sealing structure of a disc brake and belongs to the technical field of machinery. A problem that the sealing effect obtained by an existing double sealing structure ofthe disc brake is not ideal can be solved by the structure. The disc brake comprises a caliper body, rotating units axially limited into the caliper body, and screw rods connected to the interiors of the rotating unit by threads, the lower ends of the screw rods penetrate out of the lower end of the caliper body and the rotating units can rotate relative to the screw rods; the double sealing structure comprises a sealing unit II and a sealing unit I which is positioned between the caliper body and the lower ends of the screw rods and can deform along with the movement of the screw rods, therotating units are sleeved with the sealing unit II, the outer side of the sealing unit II is fixed in the caliper body, the inner side of the sealing unit II is provided with an annular sealing portion with elasticity, and the inner wall of the annular sealing portion always abuts against the outer side walls of the rotating units under the elastic force. The double sealing structure of the discbrake has the advantages of simple structure, long service life, good sealing effect and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a disc brake, in particular to a double-seal structure of the disc brake. Background technique [0002] Disc brakes are a common type of brakes currently used on passenger and truck wheels. It has the advantages of compact structure, good heat dissipation, and smooth braking. Side pressure to the brake disc, and finally lock the rotating brake disc to achieve the purpose of braking the car. During the braking process of the disc brake, its friction plate will wear out, resulting in a larger braking gap, which will directly affect the braking effect of the car. Therefore, it is necessary to add a gap self-adjusting mechanism on the disc brake to eliminate the phenomenon that the gap between the brake disc and the friction plate becomes larger. Generally speaking, the gap self-adjusting mechanism includes a rotating part that is axially limited but can rotate circumferentially an...

AI Technical Summary

Problems solved by technology

[0004] However, there are also some disadvantages in the above-mentioned technical solution: since the seal is axially positioned relative to the screw, every time the screw is extended or retracted, the external thread on the screw will constantly squeeze the seal and extend into the outer surface. The part inside the thread, which will undoubtedly cause loss to the seal, especially when the folded bush has not failed, the seal is already in loss, and because the external thread is helical, it is caused by repeated extrusion of the external thread The attrition is obviously uneven and irregular, so although the seal is able to seal after the folded liner fails, the actual seal achieved is not ideal

Images