Steering power-assisted motor

Abstract

The invention discloses a steering power-assisted motor which comprises a motor output shaft and a worm coaxially connected with the motor output shaft. The first end of the worm is supported by a first bearing; the second end of the worm is supported by a second bearing; the first end of the worm is provided with a jack block and a pressing spring; the jack block is connected to the end face of the first end of the worm through the pressing spring; the first end of the motor output shaft is connected with the first end of the worm through a connecting piece; the first end of the motor output shaft is pressed against the side, away from the pressing spring, of the jack block; and the second end of the motor output shaft is supported by a third bearing. Compared with the prior art, by adoption of the structures of the jack block and the pressing spring, the pressing spring has the larger initial pressure to sufficiently eliminate axial clearance of the three axial bearings, and it is guaranteed that axial moving of the motor output shaft and the worm in the operation and working process does not occur.

Description

technical field [0001] The invention relates to a power assist motor, in particular to a steering power assist motor. Background technique [0002] Such as figure 1 The worm shaft and motor axis sectional view of the existing structure shown; the motor output shaft 1' of the power steering motor in the prior art is supported by the motor output end bearing 2' and the motor end bearing 3' located at both ends of the motor output shaft 1' In addition, the motor output shaft 1' of the prior art transmits torque through the motor end half-coupling 4' knurled interference press-fitted with the motor output shaft 1', and then through the connecting bush 5' and the worm end half-coupling 6' (spline interference fit with worm 7') is transmitted to worm 7'. [0003] Since the four bearings distributed on the worm axis (worm end bearing 8', worm and motor connection end bearing 9', motor output end bearing 2', motor end bearing 3') have axial play, it cannot be Completely eliminate...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a power steering motor to solve the technical problem of the steering power motor in the prior art that due to the increase of the axial clearance of the bearing with the increase of the mileage of the vehicle, the clearance increases and then produces abnormal noise

Images