Gap adjustment device of draw-arm-type brake

Abstract

The invention discloses a gap adjustment device of a draw-arm-type brake. The gap adjustment device comprises a first supporting clamping block (6), a supporting unthreaded hole sleeve (7), a self-adjustment ratchet wheel and screw shaft (8), a supporting threaded sleeve (9) and a second supporting clamping block (10). A left brake shoe clamping notch (6a) is formed in the left end of the first supporting clamping block (6), a right brake shoe and draw arm clamping notch (10a) is formed in the right end of the second supporting clamping block (10), and the right end of the first supporting clamping block (6) is fixedly connected with the supporting unthreaded hole sleeve (7). The self-adjustment ratchet wheel and screw shaft (8) is composed of an unthreaded rod (8a), a ratchet wheel (8c) and a threaded shaft (8b), wherein the unthreaded rod (8a), the ratchet wheel (8c) and the threaded shaft (8b) are connected from left to right in sequence, the unthreaded rod (8a) stretches into the supporting unthreaded hole sleeve (7), the threaded shaft (8b) is matched with the supporting threaded sleeve (9) in a threaded mode, and the right end of the supporting threaded sleeve (9) is fixedly connected with the second supporting clamping block (10). When a friction pierce abrades, the gap between the friction piece and a brake drum can be adjusted to achieve the best state.

Description

technical field [0001] The invention relates to a vehicle brake system, belongs to the technical field of mechanical brake brake assemblies, and in particular relates to a gap adjustment device for a pull-arm type brake. Background technique [0002] The braking system is a key component related to the safety of people and vehicles. The brake is the most important safety and key component in all driving vehicles. The braking system of the car is divided into various structural forms according to the requirements of reliability and labor saving. The brake is a structure commonly used in mechanical brakes. [0003] In order to maintain good braking efficiency, there must be an optimal clearance value between the friction plate in the brake shoe assembly and the brake drum. As the friction lining wears out, the gap between the brake shoe assembly and the brake drum increases, and a device for adjusting the gap is required. [0004] In the existing non-self-adjusting pull-arm ...

AI Technical Summary

Problems solved by technology

This structure requires manual gear shifting to adjust the gap to meet the needs of safe driving. It often takes several adjustments to use the friction plate to the limit, which is very troublesome; the gap adjusted by experienced drivers may be more reasonable, while young drivers adjust Gaps are likely to be unsatisfactory

If the adjusted gap is too small or there is no gap at all, the result will be dragging of the brakes, unnecessary increase in vehicle torque, high fuel consumption, fast friction plate consumption, and shortened vehicle service life; if the adjusted gap is too large, it will Increasing the distance between the brake pedal and the parking handle may not be able to park within the effective distance, posing safety hazards

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