Abstract: The variable-field rotary electric machine includes: a rotor that is rotatably integrated with a shaft while an axis of the shaft is used as a rotation axis and includes a movable iron core and a displacement mechanism configured to displace the movable iron core in an axial direction of the rotation shaft. The displacement mechanism includes: a cylinder unit including a cylinder chamber to retain hydraulic fluid according to a rotor speed, a piston member connected to the movable iron core, and a sealer member provided at the piston member. The the piston member and the movable iron core are displaced in the axial direction of the rotation shaft in response to an increase or decrease in an amount of the hydraulic fluid in the cylinder chamber.

Abstract: The variable-field rotary electric machine includes: a rotor that is rotatably integrated with a shaft while an axis of the shaft is used as a rotation axis and includes a movable iron core and a displacement mechanism configured to displace the movable iron core in an axial direction of the rotation shaft. The displacement mechanism includes: a cylinder unit including a cylinder chamber to retain hydraulic fluid according to a rotor speed, a piston member connected to the movable iron core, and a sealer member provided at the piston member. The the piston member and the movable iron core are displaced in the axial direction of the rotation shaft in response to an increase or decrease in an amount of the hydraulic fluid in the cylinder chamber.

Abstract: A rotary electric machine includes a cylindrical stator core on which a coil is mounted, and a case to which the stator core is fastened via a fastening member. An insertion portion which penetrates the stator core in an axial direction of the stator core and through which the fastening member is inserted is formed in the stator core, a longitudinal direction of the insertion portion being along a radial direction of the stator core.

Abstract: A clutch device 1 is provided with a first clutch C1 and a second clutch C2, which disengageably transmit a rotational motion. The first clutch C1 includes a first outer drum 111, first outer plates 111a, a first inner hub 113, and first inner discs 113a. The second clutch C2 includes a second outer drum 121, second outer plates 121a, a second inner hub 123, and second inner discs 123a. The first outer drum 111 and the second outer drum 121 are connected, and the second inner hub 123 is journaled by the first inner hub 113 through the intermediary of a ball bearing 131.