| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil leakage preventive structure in which leaked-out lubricant does not drip outside a hollow output shaft reduction gear, even if lubricant leakage cannot be completely prevented by the temporal deterioration in an oil seal. SOLUTION: A cylindrical part 62 of a sleeve 60 is inserted into a cavity part of a hollow output shaft 22, and a specific space for storing leaked oil is formed between a flange 64 and the cylindrical part 62, and the lowest part of the hollow output shaft 22 and an inner peripheral surface. The sleeve 60 is arranged up to a higher position than a lubricant level 80 inside of a reduction gear. Thus, even if leakage of the lubricant cannot be completely prevented by the temporal deterioration in the oil seals 50a and 50b, since the flowed-out lubricant is stored in the space, the lubricant is not dripped by leaking out to an external part of the reduction gear. An annular elastic body 70 is pressed to a recessed part groove arranged in a seal support member 40, to thereby prevent oil leakage from between the sleeve 60 and the seal support member 40. COPYRIGHT: (C)2010,JPO&INPIT |
