| 摘要 |
PURPOSE:To enable oil to be automatically supplied to a housing bush and a pinion bush, by providing an oil reservoir hole in the center part of a shaft, which supports the housing bush and the pinion bush, and supply oil holes between the oil reservoir hole and internal peripheral surfaces of the both bushes. CONSTITUTION:An oil reservoir hole 2 is provided in the center part of a shaft 1, and supply oil holes 2a, 2b are provided respectively between this oil reservoir hole 2 and the internal peripheral surface of a housing bush 5 and the oil reservoir hole 2 and the internal peripheral surface of a pinion bush 4. Then if assumed Ls for stroke of a pinion 6 and Lc for length of the pinion bush 4, they are arranged in a relation where Ls<Lc. In this way, the interference of a device with external parts can be eliminated by reducing its influence for the shaft 1 in strength without causing any necessity for spreading a space to the outside of a bearing part or the like. While oil can be automatically supplied to the both bushes 4, 5 gradually by relatively small centrifugal force without disclosing the supply oil hole 2b. |
