| 摘要 |
PROBLEM TO BE SOLVED: To reduce a projection of a cover case to a transmission case side even when the number of oil passages to a hydraulic clutch formed in a transmission shaft increases. SOLUTION: Oil feeding and discharging passages 21, 22 for performing on and off operation of hydraulic clutches for transmission 6b, 6r are formed in a transmission shaft 15, and are connected with an oil passage of a cover case 25 equipped on a side surface of a transmission case 24 from a shaft end. A lubricating oil passage 23 for feeding lubricating oil to the hydraulic clutches 6b, 6r is formed in the transmission shaft 15. An opening 23a formed on a circumferential surface of the shaft end is formed in a position corresponding to a thick part (a) for preventing a bearing 31 for supporting the transmission shaft 15 from removing to the outside of the case, and a connecting oil passage 33 for connecting the lubricating oil passage 32 and the lubricating oil opening 23a of the cover case 25 is formed on the thick part (a) for preventing removal.
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