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

Active Publication Date: 2018-01-23
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the worm gear and worm clearance elimination mechanism in the prior art disclosed in the above-mentioned documents can only eliminate the axial clearance or radial clearance between the worm wheel and the worm, but cannot simultaneously eliminate these two clearances.

Method used

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

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the detailed description of the specific embodiments is used to illustrate and explain the present invention, but not to limit the present invention.

[0022] Such as figure 1 As shown, it schematically shows the structure of an embodiment of the worm gear clearance eliminating mechanism of the present invention as a whole. The worm gear clearance elimination mechanism includes a housing 1, a worm wheel 2, a worm 3, a first elastic element 7, a first bearing 8, a first retaining ring 9, a lock nut 10, a second bearing 11, a second elastic element 12, End cap 13 and second retaining ring 14 .

[0023] from figure 1 It can be clearly seen that the worm wheel 2 and the worm screw 3 are located in the housing 1, and the two keep meshing. The worm 3 has a first end and a second end, and the first end of the worm 3 is ...

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PUM

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D3/04B62D5/04F16H55/24
Inventor 殷古鹏姜旭春周中坚于俊玲丰杰李杰赵明米季清
Owner SAIC MOTOR
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