| 摘要 |
The present invention provides a lubricating system for a steering gear box including a rack bar engaged with a pinion to be moved in an intersecting direction and a yoke body allowing the rack bar to be in close contact with a pinion side and having a yoke sheet for sliding of the rack bar. A fine air gap layer for storing a lubricant is formed on a left sliding surface of the yoke sheet. A plurality of first lubricant supply grooves are formed on the left sliding surface of the yoke sheet in a radial direction of the yoke sheet to smoothly supply lubricant to the fine air gap layer. A second lubricant supply groove is formed on the rack bar in the longitudinal direction to correspond to the yoke sheet. A lubricating operation to a sliding part is smoothly maintained such that abrasion resistance of the yoke sheet is improved, generation of a joint due to partial abrasion and clearance is reduced, and a time point when a joint is generated is delayed. |
