Adjusting mechanism capable of micro-controlling back lash of pinion and rack

Abstract

The invention relates to an adjusting mechanism capable of micro-controlling the back lash of a pinion and a rack, belonging to the technical field of motor steering. The adjusting mechanism capable of micro-controlling the back lash of the pinion and the rack is constituted by a main body cover, a pinion shaft, a rack, a support seat of the rack, an adjustment plug, a back lash adjusting worm, acheck pin of the worm and the like, wherein, the pinion shaft and the rack are fixed in the main body cover, and the support seat of the rack, a back lash preloaded spring and the adjustment plug arearranged at one side of the rack. A mounting hole of the worm is opened on the main body cover, in which the back lash adjusting worm is arranged, and the tail part of the adjustment plug is processedwith splined teeth. The invention utilizes the principle that the worm gear has large drive ratio, thereby magnifying the sensitivity of the back lash accuracy control of a rack and pinion steering gear by times, correspondingly reducing the used external force when adjusting the worm, and enlarging the controllable range of tolerance clearance. The invention also can be combined with angle and displacement control equipment so that the clearance control can be automatically finished by the equipment, not only the gap value can be accurately controlled, but also the clearance adjustment can be efficiently finished, and thereby the process control capability is greatly improved.

Description

Technical field: [0001] The invention relates to a gap adjustment mechanism in a rack and pinion structure steering gear, in particular to an adjustment mechanism capable of micro-controlling the meshing gap of a rack and pinion, which belongs to the technical field of automobile steering. Background technique: [0002] In the normal running of the car, the most common left turn, right turn, and straight driving are the three basic movements of the car. In order to ensure the smooth running of the car, there is a set of mechanisms between the steering wheels of the car to complete the driving track of the car. This set of mechanisms that complete the flexible change of the driving direction of the car is called the steering system of the car. This set of mechanisms is connected by various rigid or flexible connections. to the steering wheel of the car cab, directly controlled by the driver. [0003] At present, a large proportion of the quality problems of the rack-and-pini...

AI Technical Summary

Problems solved by technology

At present, even in the same batch of products produced on the same day, it is difficult for the commonly used adjustment mechanism and control method to achieve a one-time precise control of the gap value and maintain it stably.

In the case that the production process capacity cannot be absolutely controlled, many quality problems are caused by the gap being too large or too small

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