Rack supporting device of automobile steering device

Abstract

The invention discloses a rack supporting device of an automobile steering device, the rack supporting device comprises a rack pressing block assembly, the rack pressing block assembly comprises a rolling body supporting assembly and a pressing block; the rolling body supporting assembly comprises a rolling frame of an arc plate-shaped structure and steel ball retainers, steel balls are nested between the steel ball retainers, and a screw rod is arranged on the arc surface of the rear end of the rolling frame; a spring is arranged in a stepped hole formed in the rear end face of the pressing block. A connecting ring is arranged behind the pressing block, the tail end of the screw penetrates through the pressing block along the stepped hole, the spring and the connecting ring are locked through a locking nut, and the circumferential face of the connecting ring is in interference fit with a pressing block assembly containing cavity in the steering gear shell. The rack supporting device has the advantages that the constant supporting force of the rack supporting device on the rack and the constant meshing clearance value of the gear and the rack can be kept for a long time, the friction force and noise are reduced, the driving experience of a driver can be improved, and the rack supporting device is convenient to assemble, good in wear resistance and the like.

Description

technical field [0001] The invention relates to the technical field of rack and pinion steering gear, in particular to a rack supporting device of an automobile steering gear. Background technique [0002] The existing adjustment structure for rack and pinion steering gear is such as figure 1 As mentioned above, it includes a pressure block, a spring, a screw plug and a locking nut. The support surface of the pressure block is in contact with the back of the rack, and the spring exerts an elastic force on the pressure block so that the pressure block has a pre-tightening force on the rack, and the arc of the pressure block is applied. PTFE material is provided on the support surface to improve the wear resistance of the pressure block, and the gap between the pressure block and the bolt is adjusted by twisting the adjusting bolt, so as to adjust the elastic force exerted by the spring on the pressure block, but there is a need for the adjustment structure of the pressure blo...

AI Technical Summary

Problems solved by technology

[0002] The existing adjustment structure for the rack and pinion steering gear is as follows: figure 1 As mentioned above, it includes a pressure block, a spring, a screw plug and a lock nut. The supporting surface of the pressure block is in contact with the back of the rack, and the spring exerts an elastic force on the pressure block so that the pressure block generates a pre-tightening force on the rack. The arc of the pressure block PTFE material is provided on the shaped support surface to improve the wear resistance of the press block, and the gap between the press block and the bolt is adjusted by screwing the adjusting bolt, so as to adjust the elastic force exerted by the spring on the press block, but there is a need to adjust the structure of the press block It is inconvenient to assemble and debug one by one. Due to the thinner PTFE coating, the surface PTFE will be worn, and the friction will increase to produce abnormal noise. Moreover, the gap between the pressure block and the adjusting screw plug will increase, causing the pressure block to exert force on the rack. The pretightening force is reduced, affecting the meshing operation of the rack and pinion, thus affecting the driver's driving experience and other issues

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