Gear shaft clearance adjustment structure for steering device

Abstract

The invention provides a gear shaft clearance adjustment structure for a steering device. Abrasion of internal parts of the steering device can be effectively reduced, axial clearances of gear shaftsare eliminated, and the abnormal sound problem is avoided. The gear shaft clearance adjustment structure comprises a steering device shell, a steering gear shaft and a rack which are engaged with eachother are arranged in the steering device shell, the steering gear shaft and the rack are arranged in a gear shaft hole and a rack hole correspondingly, the steering gear shaft is connected with thegear shaft hole through a rotating bearing, a clearance adjustment mechanism is arranged between the end face of the steering gear shaft and the end face of the gear shaft hole and comprises a supporting seat, a supporting arc face in sliding fit with the end face of the steering gear shaft is arranged at the top of the supporting seat, and the supporting seat and the gear shaft hole are fixed 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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