Alignment assistance and ultimate damping type steering gear

Abstract

The invention discloses an aligning assistance and ultimate damping type steering gear, comprising a rack, a stop block, a rack lining, a steering gear shell, an inner bulb assembly and a rack dust cover, wherein the rack is arranged in the shell; part of the rack extends out of the shell; the stop block and threads of an inner screwed hole at the front end of the shell are in connecting fit; the rack lining is adjacent to the stop block, and is in interference fit with the inner hole of the shell; the rack lining is in air tightness fit with the rack; and the front end of the inner bulb assembly is connected with threads of the inner hole of the rack. The steering gear also comprises a spring seat and a coil spring, wherein the spring seat is arranged in the shell in press fit; the spring seat is in clearance fit with the rack; and the coil spring is positioned between an inner bulb seat of the inner bulb assembly and the spring seat. The structure of the steering gear can improve the aligning force when the full-vehicle steering is aligned on the one hand so as to avoid incomplete steering alignment and delayed aligning response caused by increased axial force of the rack, and improves the hand feel on a steering ultimate position, buffers on the steering ultimate position, and eliminates the metal impact noise made by the ultimate position on the other hand.

Description

technical field [0001] The invention relates to an automobile steering system, in particular to a rack steering gear of an automobile auxiliary centering and limit damping noise reduction mechanism. Background technique [0002] At present, new models are continuously launched on the market every year. For the same automobile design and manufacturing plant, the chassis of some models of the same level are basically common, and only some parameters of other systems or chassis are adjusted appropriately. During the research and development of new cars, there will be more or less changes in a certain performance of the whole car due to changes in the configuration, axle load, wheelbase or engine of the whole car. [0003] The test data shows that the steering wheel positioning parameters, axle load, and steering system configuration will greatly affect the alignment of the whole vehicle. Returning performance will be lost within a certain range. If it is divided into two conf...

AI Technical Summary

Problems solved by technology

Once these structures are determined, they are not easy to change, and the gap adjustment range is very limited, and the consistency is difficult to control

Therefore, it can be said that the prior art rack-and-pinion steering gear basically does not have the function of steering assistance and returning to alignment, and at the same time, the sound of metal impact at the limit position is also unavoidable.

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