A gear shaft clearance adjustment structure of a steering gear

Abstract

The invention provides a gear shaft gap adjustment structure of a steering gear, which can effectively reduce the wear between internal parts of the steering gear, eliminate the axial clearance of the gear shaft, and avoid the generation of abnormal noise. The structure includes a steering gear housing, and a steering gear shaft and a rack that mesh with each other are arranged in the steering gear housing, and the steering gear shaft and the rack are respectively arranged in the gear shaft hole and the rack hole, and the steering gear The shaft is connected to the gear shaft hole through a rotating bearing, and a clearance adjustment mechanism is provided between the end surface of the steering gear shaft and the end surface of the gear shaft hole. The clearance adjustment mechanism includes a support seat, and the top of the support seat is provided with a The support arc surface is slidingly matched with the end surface of the steering gear shaft, and the support seat is fixed with the gear shaft hole through an elastic structure.

Description

technical field [0001] The invention relates to the technical field of automobile steering systems, in particular to a gear shaft gap adjustment structure of a steering gear. Background technique [0002] Since the development of the automobile market, people's requirements for the comfort of passenger cars have been increasing day by day, and they are becoming more and more sensitive to the abnormal noise produced when the steering wheel of the vehicle changes direction or when passing a bumpy road. The rack and pinion steering gear with tie rod assembly is an important component of the car. With the long-term driving of the car, the parts of the steering gear will be worn due to relative movement, and the gap between the parts will also change. It becomes larger, so it is easy to produce abnormal noise, and even reduce the performance of the steering system, which affects the performance of the vehicle and also affects the driving comfort of the driver. [0003] At presen...

AI Technical Summary

Problems solved by technology

At present, the adjustment structure adopted by the rack-and-pinion steering gear is mainly by adjusting the stiffness of the coil spring 4 at the rack part or adjusting the compression amount of the coil spring 4 to change the parameters such as the pressing force applied to the pressing block 3 to limit the gear. The swing of the rack can solve the problem of the rack and pinion steering gear changing direction and the abnormal sound of the bumpy road, but the adjustment of the spring parameters can only increase the force exerted by the pressure block 3 on the rack 2 in the axial direction, and limit the swing of the rack 2. However, it cannot improve the relative movement of the gear shaft 1 and the rack 2 along the axial direction of the gear and the impact noise caused by the movement of the pressure block 3 in the radial direction after being subjected to the reaction force exerted by the rack 2. The problem of abnormal road noise still cannot be further improved, and the abnormal noise will become more and more obvious after the vehicle has been running for a period of time

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