Double-cylinder two-way double-leading-shoe drum type self-adjusting brake with parking function

Abstract

The invention discloses a double-cylinder two-way double-leading-shoe drum type self-adjusting brake with a parking function. Front and rear shoe assemblies are installed on the two sides of a brake bottom plate assembly, a wheel cylinder assembly and a brake shoe return spring are installed and connected between the front and rear shoe assemblies, a parking self-adjusting mechanism is installed between the upper parts of the front and rear shoe assemblies below the wheel cylinder assembly and the brake shoe return spring, and a self-adjusting wheel cylinder assembly and a parking inhaul cable are installed and connected between the lower parts of the front and rear shoe assemblies. In the parking self-adjusting mechanism, a gap adjusting plate is installed at one end of a push plate in a hinged mode, a plate pin penetrates through pin holes in the push plate and the gap adjusting plate to enable the push plate and the gap adjusting plate to be hinged, and the push plate and the gap adjusting plate are meshed through teeth. One end of a tension spring is hooked with the plate pin, and the other end of the tension spring crosses the gap adjusting plate and then is hooked to a spring connecting hole of the push plate. According to the double-cylinder two-way double-leading-shoe drum type self-adjusting brake with the parking function provided by the invention, a vehicle with a self-boosting drum brake can be manually parked, so that the cost for independently developing a parking device is saved, and the reliability is high.

Description

technical field [0001] The invention relates to a hydraulically actuated double-cylinder, bi-directional, double-leading-shoe type drum-type self-adjusting brake, in particular to a double-cylinder, bi-directional, double-leading-shoe type drum-type self-adjusting brake with parking function. Background technique [0002] Hydraulic double-cylinder bidirectional double-collar shoe drum brakes are mostly used on engineering vehicles and trailers with heavy loads and slow speeds. It is required to brake effectively and smoothly. Self-energized drum brakes with clearance self-adjusting function can be very Good to meet the requirements of the vehicle. [0003] However, the working environment of conventional engineering vehicles or trailers is relatively harsh. It may be on steep mountain roads or on uneven construction sites. High dynamic efficiency and good reliability. However, the mechanical parking (handbrake) device of this type of car is often realized by a separate dev...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the waste of resources and costs caused by the separate design of the hand parking brake device in the prior art, the purpose of the present invention is to propose a self-adjustable double-cylinder bidirectional double-leading shoe drum type with parking function. Brake, so that the two-way double-leading shoe drum brake can be added with a mechanical brake device on the basis of the conventional service braking function, so that the vehicle with the two-way double-leading shoe drum brake can directly use a set of brakes at the same time Realize two functions of driving and parking, and directly adopting this structure for parking will not affect the original driving brake, which can save cost and space

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