| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To restrain deterioration in fuel economy of vehicle resulting from an airtight condition of a lubricating environment. <P>SOLUTION: A power transmission device is equipped with a clutch housing 3 and a clutch hub 5 which are arranged inside and outside in a relatively rotatable manner, a main clutch 73 for allowing a torque transmission between the clutch housing 3 and the clutch hub 5 to be intermittent in a lubricating environment provided between the clutch housing 3 and the clutch hub 5 to house a lubricating oil, an insertion hole 43 provided on a side of the clutch housing 3 to allow an end of the clutch hub 5 to be located adjacently to the outside, an seal lip 59 allowed to be in sliding contact with the clutch hub 5 interposed between the clutch hub 5 and the insertion hole 43, an oil seal 53 for closing a portion between the clutch housing 3 and the clutch hub 5 which are in the lubricating environment, and an inner pressure regulator 19 for regulating an inner pressure change between the clutch housing 3 and the clutch hub 5 which are in the lubricating environment. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
