Worm gear backlash elimination mechanism, electric power steering system and automobile

A worm gear and gap technology, applied in the direction of mechanical steering gear, electric steering mechanism, mechanical equipment, etc., can solve the problems that cannot be eliminated at the same time, achieve simple structure, low assembly process requirements, eliminate radial meshing gap and meshing side Gap effect
CN104176113BActive Publication Date: 2018-01-23SAIC MOTOR
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SAIC MOTOR
Publication Date
2018-01-23

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Abstract

The invention relates to a worm gear and worm clearance elimination mechanism, which comprises a housing, a worm wheel and a worm, a lock nut, a first retaining ring, a second retaining ring, an end cover, a first bearing and a second bearing, Among them, the first retaining ring and the lock nut fix the first bearing, and the first elastic element that generates the compressive force along the axial direction of the worm is arranged at the first bearing, while the end cover and the second retaining ring fix the second bearing , a second elastic element generating a pressing force along the axial and radial directions of the worm is arranged at the second bearing. The present invention also relates to an electric power steering system provided with the worm gear clearance elimination mechanism, and an automobile equipped with the electric power steering system. The invention has the advantages of eliminating the radial meshing clearance and the meshing side clearance of the worm gear and worm at the same time, effectively reducing the steering noise of the automobile and improving the steering stability of the automobile.
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Description

technical field

[0001] The invention belongs to the technical field of automobiles, and relates to a worm gear clearance elimination mechanism, an electric power steering system provided with the worm gear clearance elimination mechanism, and an automobile equipped with the electric power steering system. Background technique

[0002] In the automotive field, the electric power steering system is one of the common power steering systems. It is formed by combining a mechanical system and an electric motor. Most existing mechanical systems use worm gear mechanisms. Due to the influence of factors such as machining errors, assembly errors and working environment, the meshing gap between worm gears and worms has always existed. This gap mainly includes radial meshing gap (ie "radial gap") and meshing side gap (ie "axial gap"). The existence of radial meshing clearance will make the transmission performance of worm gear and worm worse, thereby reducing the stability of vehicle h...

Claims

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