Mechanical disc brake with automatic adjustment of shoe clearance

Abstract

The invention discloses a mechanical disc brake with the shoe block clearance automatically adjusted. The mechanical disc brake is characterized in that a left shoe block is fixedly connected with one end of a left shaft, the other end of the left shaft penetrates through a base and connected with a left wedge block, and a passive wedge block is fixedly installed in the middle of the left shaft; a right shoe block is fixedly connected with one end of a right shaft, and the other end of the right shaft penetrates through the base and fixedly connected with a right wedge block; a right shaft section between the right shoe block and the base is sleeved with a slide block; an active wedge block is arranged between the slide block and the right shoe block, and the two surfaces of the active wedge block make contact with the right shoe block and the slide block through steel balls; a connection shaft perpendicular to the right shaft and the left shaft is installed on the base, a right stop block and a left stop block are connected to the two ends of the connection shaft, the right stop block is in bevel fit with the right wedge block, and the left stop block is in bevel fit with the left wedge block; and the slide block is provided with a push block which is in prismatic pair fit with the slide block, and the push block is in bevel fit with the passive wedge block. According to the mechanical disc brake with the shoe block clearance automatically adjusted, the shoe block clearance of the mechanical disc brake is automatically adjusted, and the mechanical disc brake has the characteristics of being low in cost and large in braking torque.

Description

technical field [0001] The invention relates to a braking device for bicycles, tricycles and electric vehicles, in particular to a mechanical disc brake with automatic adjustment of shoe gaps. Background technique [0002] There are three problems in the existing bicycle disc brakes: first, when the single-side drive structure is adopted, the disc is easily deformed and jumps, causing the friction plate to scrape the disc to generate dragging resistance; Second, due to the use of the swing arm to amplify the braking torque, the torque between the brake line and the swing arm gradually decreases with the increase of the swing angle of the swing arm, resulting in the disadvantages of unstable torque amplification and insufficient braking torque; third, the existing The gap between the disc brake shoes increases with the wear of the shoe friction material and cannot be adjusted automatically, which leads to the continuous increase of the idle stroke of the brake handle, especia...

AI Technical Summary

Problems solved by technology

[0002] There are three problems in the existing bicycle disc brakes: first, when the single-side drive structure is adopted, the disc is easily deformed and jumps, causing the friction plate to scrape the disc to generate dragging resistance; Second, due to the use of the swing arm to amplify the braking torque, the torque between the brake line and the swing arm gradually decreases with the increase of the swing angle of the swing arm, resulting in the disadvantages of unstable torque amplification and insufficient braking torque; third, the existing The gap between the disc brake shoes increases with the wear of the shoe friction material and cannot be adjusted automatically, which leads to the continuous increase of the idle stroke of the brake handle, especially for mechanical disc brakes, which will greatly affect the design force magnification

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