| 摘要 |
PROBLEM TO BE SOLVED: To make a member for defining each oil chamber of a hydraulic clutch included in a change gear thin in thickness, and to reduce sizes of the hydraulic clutch and the change gear.SOLUTION: An automatic change gear 25 comprises: a first planetary gear mechanism 30 as a double-pinion type reduction planetary gear which decelerates rotation inputted to a planetary carrier 34, and outputs it from a ring gear 32; and a clutch C1 including a clutch hub 110 which is integrated with the ring gear 32 of the first planetary gear mechanism 30, and rotates integrally with the ring gear 32 as a whole. Then, an engagement oil chamber 180 of the clutch C1, a clutch piston 160 which defines a cancel oil chamber 190, and an engagement oil chamber defining member 170 are supported by the clutch hub 110 (support member 130). |
