Transmission mechanism achieving rapidly returning and electro-hydraulic brake system

Abstract

The invention relates a transmission mechanism achieving rapidly returning. The mechanism is used in an electro-hydraulic brake system and comprises a worm rod(8) and a worm wheel (9) which are meshed with each other, the worm rod(8) is used for transmitting brake assistance power generated by a motor (7) to the worm wheel (9), and the worm wheel (9) is used for transmitting the brake assistance power to a hydraulic brake main cylinder (6) through a secondary transmission mechanism which is connected with the worm wheel (9); the transmission mechanism further comprises elastic components used for providing torsional force, one ends of the elastic components are connected with the worm wheel (9), and the other ends of the elastic components are fixed; and when the transmission mechanism is at an original position, the elastic components exist preload, when the motor (7) generates the brake assistance power, the rotating of the worm wheel (9) enables the elastic components to generate torque, and the torque is opposite to the worm wheel (9) in rotating direction. Compared with prior art, the transmission mechanism achieving rapidly returning has the advantages of high returning speed, compact structure and the like.

Description

technical field [0001] The invention relates to a transmission mechanism, in particular to a fast return transmission mechanism and an electronic hydraulic braking system. Background technique [0002] In order to solve the serious problems brought about by the growth of car ownership, electrification and intelligentization of vehicles are an important direction for the automotive industry to seek breakthroughs. In urban working conditions, the braking of the car is relatively frequent, so the energy consumed accounts for a large part of the total energy consumed by the car. An important difference between electric cars and traditional cars is the introduction of regenerative braking in the braking system, regenerative braking The recovered energy can increase the mileage of the car, make up for the shortcomings of the current battery technology, and achieve the purpose of energy saving and environmental protection; in addition, the power source of the electric car is comple...

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Problems solved by technology

[0005] The Chinese patent application No. 201610265555.8 connects the coil spring to the push rod of the brake master cylinder, and uses the rebound of the rack return spring to make the push rod move in the opposite direction. The disadvantage is that the compressed length of the coil spring itself needs to occupy the limit The axial space of the moving master cylinder, and due to the two-stage transmission of rack gear and worm gear, the transmission resistance is relatively large, and the reverse efficiency is low. To push the transmission mechanism back to its position, a large-sized compression spring is required

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