Bidirectional two-leading-shoe drum type brake

Abstract

The invention relates to the technical field of automobile braking, and discloses a bidirectional two-leading-shoe drum type brake. The bidirectional two-leading-shoe drum type brake comprises a rearshell. According to the bidirectional two-leading-shoe drum type brake, connecting end blocks are mounted at the two ends of a brake shoe. U-shaped grooves are formed in the connecting end blocks. Rotation of a supporting arm is driven by rotating of an outer ring. Therefore, a supporting column can be clamped into the U-shaped grooves and becomes a rotating fulcrum of the brake shoe. At the moment, a side column also rises to abut against one side of the supporting column. Accordingly, it can be well ensured that the relative position of one end of the brake shoe is fixed through the connecting end blocks. Compared with the traditional design of a floating structure, the brake shoe can have a stable fulcrum under the pushing of a brake wheel cylinder, the stability of the brake shoe during braking can be guaranteed by combining calipers on the brake wheel cylinder, the probability of failure during braking of the bidirectional two-leading-shoe drum type brake is greatly reduced, and the safety and stability of the brake are improved.

Description

technical field [0001] The invention relates to the technical field of automobile braking, in particular to a bidirectional double-leading shoe type drum brake. Background technique [0002] Existing automobile wheel brakes can be divided into disc brakes and drum brakes. Drum brakes are mainly used on commercial heavy trucks because of their stronger braking force. The brake shoe is pushed to make the shoe on the brake shoe contact and rub against the inner wall of the brake drum to perform braking. In order to enhance the braking effect, the traditional drum brake is gradually changed to a two-way double-leading shoe type. Drum brakes, the two brake shoes in the brake belong to the leading shoe when braking in the forward or backward process, while the force of the leading shoe in the traditional drum brake is greater than that of the trailing shoe, so the double leading shoe The brake can increase the braking effect, but the existing story brake always has the following ...

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the lack of internal structure of the existing two-way double-collar shoe drum brake, both ends of the brake shoe are supported by floating support, that is, the two ends of the brake shoe and the calipers on the brake wheel cylinder The drum brakes are mostly used on commercial heavy trucks. The heavy inertia force generated by the weight of the heavy trucks makes it impossible for the existing two-way double-leading shoe drum brakes to ensure stable braking. If the shoe is in good contact with the brake drum, it is very likely that the brake shoe will break away from the brake wheel cylinder due to too much inertial force, so that the two-way double-lead shoe drum brake will fail, and this failure is fatal. It directly leads to the brake failure of commercial heavy trucks, causing serious accidents, causing serious casualties and property losses

[0004] 2. The structure of the existing two-way double-collar shoe drum brakes is relatively airtight, and because the drum brakes applied to the heavy truck will produce high pressure due to the heavy truck's excessive self-weight when braking the heavy truck frictional heat, and it is difficult and slow to dissipate this heat only through the housing of the brake in a relatively airtight drum brake. If the temperature is too high, it will directly lead to irregular thermal deformation of the drum brake , thereby reducing the braking effect of the brake and causing safety hazards

Images