Gap adjusting device and gear rack steering gear

Abstract

The invention relates to the technical field of steering, and discloses a gap adjusting device and a gear rack steering gear. When the gear rack steering gear is assembled, a friction plate of at least one gap adjusting device is located on the side, back to a gear of a gear rack mechanism, of a rack; and the clearance adjusting piece is used for providing pressure for the friction plate to enable the friction plate to abut against the acting force of the rack so that the radial clearance during rack assembling is eliminated. When the gear rack steering gear works, the radial clearance of the rack is eliminated through elastic deformation of the clearance adjusting piece so as to guarantee stable movement of the gear, the radial clearance generated by abrasion of the tooth profile of the rack can be dynamically compensated, and the buffering effect can be achieved when the gear rack steering gear is subjected to impact loads so as to absorb shock and reduce noises. The friction force between the rack and the gap adjusting device in the moving process of the rack is reduced through the friction plate, and the abrasion and noise are reduced; and the friction plate is supported through the base body so as to avoid plastic deformation of the friction plate, and the service life of the gap adjusting device is prolonged.

Description

technical field [0001] The invention relates to the technical field of steering, in particular to a gap adjusting device and a rack and pinion steering gear. Background technique [0002] The double pinion electric power steering system is a device used to change the driving direction of the vehicle. The steering gear is an important part of the double pinion electric power steering system. The steering gear includes a rack and pinion steering gear and a worm gear steering gear. Among them, the gear The rack and pinion steering gear includes a rack and pinion mechanism, a steering rod and a steering housing. The rack of the rack and pinion mechanism is arranged in the steering housing and can move linearly along the steering housing. The transmission unit can convert the rotation of the steering wheel into the rotation of the rack. Linear motion, the rack drives the wheels to rotate through the steering rod to control the driving direction of the vehicle. [0003] The above...

AI Technical Summary

Problems solved by technology

[0004] For this reason, in the prior art, the radial displacement of the rack is eliminated by the gap adjustment device, but the existing gap adjustment device has a complex structure, which will lead to complex assembly and testing processes, increased costs, and the gap adjustment device itself also has noise. Problem; In addition, during the reciprocating motion of the rack, the friction between the existing gap adjustment device and the rack is relatively large, which is easy to wear, has a short service life, and is noisy

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