Heavy truck electric control mechanical disc type brake

Abstract

The invention relates to a heavy truck electric control mechanical disc type brake, in particular to a disc type brake applicable to an electromechanical brake system (EMB). Two sliding pin floating clamp bodies are adopted in a braking clamp. According to a double-push-rod thrust executing mechanism, two ball screw pairs are used for converting the rotation motion into thrust for a friction plateduring braking, and meanwhile the thrust executing mechanism integrates the automatic braking gap adjusting function. A power distribution mechanism averagely distributes source power to the two ballscrew pairs, and the synchronous motion of double push rods is achieved. A planet speed reduction mechanism conducts deceleration and torsion increasing on the rotation motion, and a power output mechanism comprises a driving braking part and a parking braking part. The power distribution mechanism divides power into two parts input to the two ball screw pairs respectively, the ball screw pairs convert the rotating motion into the push rod linear motion, and accordingly the friction plate is pushed for braking. According to the heavy truck electric control mechanical disc type brake, the braking response time is shortened, a pipe line bundle is simplified, and the basic control object is provided for whole truck intelligence.

Description

technical field [0001] The invention belongs to the field of heavy-duty vehicle braking, in particular to a heavy-duty vehicle disc brake, especially suitable for the disc brake of an electronically controlled mechanical braking system (EMB). Background technique [0002] At present, the conventional braking method of heavy-duty vehicles is pneumatic braking. Its principle is to fill the brake chamber with compressed gas, push the push rod out, and then push the brake actuator to generate braking force. This braking method requires a certain It takes time to build up the pressure, so its reaction time is longer. In addition, the pipeline layout of the high-pressure air brake system on the vehicle is relatively complicated, and maintenance is difficult. In addition, there is a greater risk of leakage. In addition, with the intelligentization of the vehicle With the advancement of application, the existing pneumatic brake system cannot meet the precise control requirements. Th...

AI Technical Summary

Problems solved by technology

[0002] At present, the conventional braking method of heavy-duty vehicles is pneumatic braking. Its principle is to fill the brake chamber with compressed gas, push the push rod out, and then push the brake actuator to generate braking force. This braking method requires a certain It takes time to build up the pressure, so its reaction time is longer. In addition, the pipeline layout of the high-pressure air brake system on the vehicle is relatively complicated, and maintenance is difficult. In addition, there is a greater risk of leakage. In addition, with the intelligentization of the vehicle With the advancement of application, the existing pneumatic brake system cannot meet the precise control requirements. The present invention aims to provide a brake powered by an electric motor. In addition to solving the above problems, it also has the following advantages: the system structure and installation are simple, and the original system is reduced. Compressors, air handling units, air storage tanks and control valves in the dynamic system; no noise in the braking process; combined with the control system, it is convenient to expand functions, and the advanced braking control strategy can be reflected at any time through software updates

[0003] After reviewing relevant patent documents, the existing electromechanical braking system (EMB) disc brakes are all developed based on passenger cars, and their structure is different from that of heavy-duty vehicle disc brakes. Car electromechanical braking system (EMB) The characteristics of the disc brake are: 1. It adopts a single push rod structure, and the contact area of ​​the friction plate is small, which is easy to cause eccentric wear; 2. It does not have a special brake clearance self-adjusting mechanism, and the clearance adjustment is generally realized by increasing the motor rotation angle. Function; 3. Since it is a single push rod structure, there is no process of power distribution; 4. It does not have a parking function. Generally, cars are equipped with two sets of mechanisms: a service brake and a parking brake.

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