| 摘要 |
PURPOSE:To prevent the deformation of a sealing member by attaching an annular member to prevent a lubricating oil to lubricate a final gear from jetting toward a lip to the neck of the final gear so as to be opposite to the lip of the sealing member. CONSTITUTION:A sealing member 23 with a lip provided to prevent the leakage of a working oil 22 in a casing 11 is attached to a cover 24 forming the lower part of the casing 11. An annular body 39 to prevent a grease 30 to lubricate a final gear 14 from jetting toward the lip of the member 23 is attached to the neck of the gear 14. Next, the grease 30 is rolled in between the gear 14 and a gear 15 with the turning motion of an upper turning body 1, and when the grease 30 jets toward the member 23, the grease 30 strikes against the annular body 39, which checks the jetting of the grease toward the lip of the member 23. Thus the springing up action of the lip of the member 23 caused by the jetting of the grease 30 does not occur, and the deformation of the member 23 can thereby be prevented. |
