Electric boost braking device

Abstract

The invention discloses an electric boost braking device which comprises a boost cylinder body, a foot bar assembly, a foot bar reset spring, an electric booster and a brake pump assembly. A brake pump ejector rod used for receiving braking force is arranged on the brake pump assembly. The electric booster comprises an electric power assembly and a boost sliding sleeve, wherein the boost sliding sleeve is slidably arranged in the boost cylinder body, and sliding driving force of the boost sliding sleeve is provided by the electric power assembly. The boost sliding sleeve is in ejection fit with the brake pump ejector rod. The foot bar reset spring is arranged in an axial through hole and elastically connected with the head end of the foot bar assembly in a resettable mode. In the process that the head end of the foot bar assembly slides towards the brake pump ejector rod in the axial direction, the head end of the foot bar assembly sequentially penetrates through a positioning pin through hole and the outer end of the axial through hole in the boost sliding sleeve and acts on the brake pump ejector rod in an ejecting mode. The electric boost braking device has the advantages that the structure arrangement is reasonable, and the foot car braking force and the electric boost braking force are decoupled by each other.

Description

technical field [0001] The invention relates to a brake component for auto parts, in particular to an electric power-assisted braking device, which can be used in the fields of electric vehicles, hybrid vehicles, unmanned vehicles or intelligent driving vehicles. Background technique [0002] The braking system of traditional internal combustion engine vehicles mostly uses a vacuum booster device to assist the driver to generate sufficient braking force, and the vacuum source comes from the engine or a mechanical vacuum pump. For new energy vehicles (fuel cell vehicles and pure electric vehicles), there is no engine to provide a vacuum power source to provide braking boost, and the braking force generated by manpower alone cannot meet the needs of service braking. The electric power-assisted braking device can satisfy this demand very well. [0003] In recent years, major automobile and component manufacturers have launched similar electronic hydraulic braking systems one a...

AI Technical Summary

Problems solved by technology

However, due to the non-decoupling between the pedal simulator and the electric booster, the driver's pedaling force also needs to drive the motor of the electric booster to rotate at the same time. They are all high transmission output ratio settings, and it will be very difficult to drive the motor in reverse through the driver's pedal force. Therefore, when the electric booster fails, using the driver's pedal force to brake is not only The response speed is low, and the braking is difficult, which reduces the driving safety of the vehicle

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