Electronic parking actuator used for vehicle braking system

Abstract

The invention relates to an electronic parking actuator used for a vehicle braking system. The electronic parking actuator comprises an upper shell, a lower shell, a motor, an energy transmission mechanism and a speed reduction mechanism. The motor, the energy transmission mechanism and the speed reduction mechanism are arranged in an inner cavity formed by the upper shell and the lower shell. The motor is connected with the speed reduction mechanism through the energy transmission mechanism. An upper shell center column is arranged in the upper shell. A lower shell center hole corresponding to the upper shell center column in position is formed in the lower shell. By the adoption of the electronic parking actuator of the structure for the vehicle braking system, the structure is simple, the requirement of the actuator for normal energy transmission can be met as well, the whole position of a whole actuation mechanism is guaranteed through positioning conducted by a center pin on the upper shell and the lower shell, the position of the speed reduction mechanism is determined through a speed reduction mechanism pin via an upper shell locating sleeve, and therefore the effect of a retaining frame is better replaced. The electronic parking actuator is relatively low in technological requirement, the production efficiency is greatly improved, and the application range is wider.

Description

technical field [0001] The present invention relates to the technical field of vehicle structures, in particular to the technical field of vehicle braking systems, in particular to an electronic parking actuator for the vehicle braking system. Background technique [0002] Caliper-type electronic parking brake, the motor provides power for the caliper-type parking actuator, the power is transmitted to the reduction mechanism through the transmission, and then the mechanical energy is transmitted to the caliper through the output shaft to achieve the parking effect. The center distance between the motor and the reduction mechanism needs to be a fixed value to ensure the output performance and stability of the transmission mechanism. Chinese patent application number 200780005928.7, titled "Electric Brake Actuator with Reduced Noise", proposes that "the distance between the motor and the gear shaft is fixed by a rigid spacer", and the rigid spacer proposed by the patent is Z-s...

AI Technical Summary

Problems solved by technology

Chinese patent application number 200780005928.7, titled "Electric Brake Actuator with Reduced Noise", proposes that "the distance between the motor and the gear shaft is fixed by a rigid spacer", and the rigid spacer proposed by the patent is Z-shaped or S shape, although the rigid spacer mentioned in the patent can ensure the center distance between the motor and the reduction mechanism, but the spacer is easily deformed after being pressed by the upper cover during assembly, so that the motor shaft and the reduction mechanism The center pin shaft is tilted, resulting in low transmission efficiency, increased gear wear, increased noise, and reduced service life

Moreover, the structure of the spacer is complex, the assembly process is cumbersome and the cost is high, and the consistency of the assembled product is difficult to control, and the existence of the cage will also affect the welding of the actuator shell, which directly affects the pass rate of the entire actuator (ie High process requirements)

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