| 摘要 |
PROBLEM TO BE SOLVED: To properly lubricate a splined part between a support member and a carrier in the last stage.SOLUTION: On the axial direction one side of a rotary shaft 39, there provided a male spline on the rotation source side 39A1 which is splined to a driven gear 27 of a speed reduction mechanism 23 and a male spline on the oil reservoir space side 39A2 which extends in an oil reservoir space 21. On a fitting flange contact surface 48B of a nut member 48 that is screwed with a male screw 47F of a carrier 47 in the last stage, a plurality of oil passages 49 is provided. By this, a lubricant 52 stored in the oil reservoir space 21 is scooped up by a male spline on the oil reservoir space side 39A2 of the rotary shaft 39, and attached to an end surface 14C of a fitting flange 14 of a support member 12. This oil drop 52A flows down along the end surface 14C onto the outer peripheral surface of the nut member 48, and then, is supplied via the oil passages 49 of the nut member 48 to a splined part between the support member 12 and the carrier 47. |
