| 摘要 |
PURPOSE:To aim at miniaturization in an oil pump, by installing the oil pump to be driven according to relative rotational frequency between an input shaft and an output shaft, and increasing the relative rotational frequency via a planetary gear mechanism. CONSTITUTION:When a relative speed difference occurs between an input shaft 1 and an output shaft 2, a planetary gear 8 of a planetary gear mechanism A is rotated in the reverse direction to a carrier 6 and a ring gear 9, and a sun gear 11 is rotated in the same direction as the input shaft 1. And, an oil pump B to be driven by relative rotation between a countershaft 10 and the output shaft 2 is driven by increasing a speed of relative rotation between the input shaft 1 and the output shaft 2. Therefore, in this oil pump B, there is produced large drive resistance even if relative rotational frequency between these shafts 1 and 2 is small. And, large torque is transmitted to the output shaft 2 from the gear 8. With this constitution, even if the oil pump B is miniaturized, large transfer torque is securable, and a burden on the oil pump 8 becomes lightened at that.
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