Automatic compensation drum brake

Abstract

An automatic compensation drum brake comprises a drum cover, a rocker arm, a cam shaft, a first one-way bearing set, a second one-way bearing set, a brake shoe and a return spring of the brake shoe, the brake shoe is connected and arranged in the drum cover, and the cam shaft is provided with the first one-way bearing set and the second one-way bearing set and connected with the rocker arm through the first one-way bearing set. The second one-way bearing set is connected with the drum cover and abuts against the brake shoe. The two sets of one-way bearings are classically applied, the gap between forward rotation and reverse non-return of the one-way bearings is ingeniously utilized, automatic compensation is achieved in a limited space, and the brake drum is simple, reliable, small in production difficulty and low in cost. Manual adjustment is not needed, all brake pads of the shoe blocks can be completed, waste is avoided, and the service life of the shoe blocks is prolonged.

Description

technical field [0001] The invention relates to a mechanical drum brake of a vehicle, in particular to an automatic compensation drum brake. Background technique [0002] At present, the mechanical drum brakes driven by wires on motorcycles, electric vehicles, motorcycles, etc., after the brake pads are worn out, the brake handles become loose, and the screws on the edge of the hub need to be manually tightened. The screws are stained with mud and water, and tools must be used, which is very troublesome. And with the rise of shared bicycles and shared electric vehicles, the vehicles are constantly flowing, which has caused major problems for maintenance. Loose brake lines, reduced brake sensitivity, and great potential safety hazards; and the brake pads are used up about 1mm. Take off the rocker arm (also known as the pull rod) and rotate it at an angle before reinstalling it. This process is not only professional but also troublesome, and the repairer is often not easy to c...

AI Technical Summary

Problems solved by technology

[0002] At present, the mechanical drum brakes driven by wires on motorcycles, electric vehicles, motorcycles, etc., after the brake pads are worn out, the brake handles become loose, and the screws on the edge of the hub need to be manually tightened. The screws are stained with mud and water, and tools must be used, which is very troublesome. And with the rise of shared bicycles and shared electric vehicles, the vehicles are constantly flowing, which has caused major problems for maintenance. Loose brake lines, reduced brake sensitivity, and great potential safety hazards; and the brake pads are used up about 1mm. Take off the rocker arm (also known as the pull rod) and rotate it at an angle before reinstalling it. This process is not only professional but also troublesome, and the repairer is often not easy to collect money, so the repairer often charges money to replace the brake shoes, resulting in 5 Millimeter brake pads are often replaced after using less than 2mm, which is a lot of waste

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