Radial clearance adjusting structure of worm gear and worm

Abstract

The invention discloses a radial clearance adjusting structure of a worm gear and worm. The radial clearance adjusting structure comprises a shell, a worm gear and a worm, wherein the worm gear and the worm are arranged in the shell and are mutually meshed; two ends of the worm are arranged on the shell through a first bearing and a second bearing in a supporting way; the outer part of the first bearing is provided with an adjusting sleeve in a sleeving way; an adjusting zone which is used for enabling the first bearing to move in the radial direction is arranged in the adjusting sleeve; a threaded hole is formed in the shell and is positioned under the adjusting sleeve; an adjusting screw rod is arranged in the threaded rod; one end, which is positioned in the shell, of the adjusting screw rod is provided with a meshing part; the meshing part is a circular truncated cone body; spiral teeth are arranged at the periphery of the meshing part; root diameters of the spiral teeth on the meshing part are gradually increased from one end which is far away from the adjusting screw rod to one end which is close to the adjusting screw rod; the spiral teeth on the meshing part are partially meshed with the worm. According to the radial clearance adjusting structure disclosed by the invention, the adjustment on a clearance between the worm gear and the worm can be realized through the matching of the adjusting screw rod which is arranged under the adjusting sleeve and the meshing part which is arranged at one end of the adjusting screw rod with the adjusting sleeve, and thus the clearance which is not beneficial for the transmission of the worm gear and worm can be removed.

Description

technical field [0001] The invention relates to the technical field of worm gear transmission, in particular to a radial gap adjustment structure of a worm gear. Background technique [0002] In the automobile steering system, the motor is often connected with the worm gear reducer to achieve deceleration and torque increase, and then transmit the motion to the steering column. In the existing structure, both ends of the worm are supported on the housing of the reducer through bearings, and the worm is connected to the output shaft of the motor through a coupling; the worm wheel is fixedly connected to the output shaft of the steering column, and the output shaft of the steering column is supported by bearings on the reducer housing. When the motor rotates, the worm is driven by the coupling to rotate, and the worm transmits power to the output shaft of the steering column through meshing with the worm gear, realizing the power steering function. [0003] The long-term str...

AI Technical Summary

Problems solved by technology

[0003] The long-term stress of the worm gear during the transmission process will produce a gap; the generation of the gap will cause the worm gear to be unsteady in transmission, and there will be transmission ratio fluctuations and transmission noise, which will eventually lead to the failure of the worm gear

Images