Driving and parking dual-purpose wet-type multi-piece brake

Abstract

The invention relates to a driving and parking dual-purpose wet-type multi-piece brake. The driving and parking dual-purpose wet-type multi-piece brake comprises a brake cylinder body, wherein a plug screw is arranged on the brake cylinder body, a driving braking mechanism and a parking braking mechanism are arranged on a whole, and the driving braking mechanism and the parking braking mechanism share a set of friction pair. The driving braking mechanism comprises a piston which is matched with the braking cylinder body, wherein a driving braking oil duct is arranged in the braking cylinder body, one end of the driving braking oil duct corresponds to the left side of the piston, the right side of the piston is attached to the left side of a pressing plate, the other end of the driving braking oil duct is communicated with an oil opening formed in a main speed reducer shell body, the oil opening is adjacent to a vent valve arranged on the main speed reducer shell body, and the oil opening is connected with a hydraulic pump. According to the driving and parking dual-purpose wet-type multi-piece brake, a braking system of an automobile can be simplified, the weight of the whole automobile is reduced, fuel consumption can be lowered, the mobility of the automobile can be improved, interchange between the driving and parking dual-purpose wet-type multi-piece brake and a shoe brake can be achieved in terms of the structure and the installation, and other parts of an axle can not be changed.

Description

technical field [0001] The invention relates to automobile parts, in particular to a wet multi-plate brake for both driving and parking. Background technique [0002] At present, the main brake of vehicles widely adopts the shoe-type structure, but because the shoe-type structure is limited by the size of the vehicle hub and the brake drum is worn for a long time, the gap needs to be adjusted frequently; when the brake drum is contaminated by oil, mud, water, etc., Difficult to get rid of, and influence braking stability; And have the shortcoming such as small effective area, bad heat dissipation, cause the main brake of vehicle to adopt the caliper disc brake with better braking performance gradually. However, although the caliper disc brake overcomes some shortcomings of the shoe brake, it still has small friction area, high unit friction surface pressure, high requirements on the strength of the friction lining material and the pressure resistance at high temperature, and...

AI Technical Summary

Problems solved by technology

[0009] (6) The friction lining and the dual steel plate are thin, and the damage type is mostly the burning or warping caused by the instantaneous temperature rise or uneven temperature distribution, rather than the wear of the friction lining

[0010] Therefore, wet multi-disc brakes have been widely used in large and heavy-duty vehicles at present, replacing the previously used dry brakes such as shoe-type or caliper-type brakes, but they cannot be interchanged with shoe-type or caliper-type brakes in terms of structure and installation. ; and most of the wet multi-disc brakes on the market only have the function of service braking, while the parking brake needs to be designed separately. In order to realize the parking brake, vehicles equipped with wet multi-disc brakes generally need to be equipped with a central brake

This leads to complex structural design of the vehicle, increased weight, increased fuel consumption, and reduced maneuverability

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