| 摘要 |
To prevent an engine from being increased in size in connection with the supply of oil to hydraulic clutches in an oil passage structure for the hydraulic clutches of the engine wherein a plurality of oil passages are defined axially in a rotational shaft on which the hydraulic clutches are mounted and a plurality of supply oil passages which are defined in a case cover for guiding oil from an oil supply source are connected individually to the oil passages in the rotational shaft. A cavity (135) having a closed end wall (135a) facing an end of a rotational shaft (71) and receiving the end of the rotational shaft (71) therein is defined in an inner surface of a case cover (55) such that supply oil passages (125, 126) are open at inner circumferential surfaces of the cavity (135). At least one radial joint hole (138) is defined in an end portion of the rotational shaft (71) and extends radially of the rotational shaft (71), the radial joint hole (138) having an inner end connected to another oil passage (111) in the rotational shaft (71) than a particular oil passage (112) in the rotational shaft (71). The radial joint hole (138) is connected to a corresponding supply oil passage (125) of the supply oil passages (125, 126), in the cavity (135). |
