Clutch mechanism for vehicle

A clutch mechanism for a vehicle, the clutch mechanism comprising:

• a first rotating member having a shaft shape;
• a second rotating member supported by the first rotating member such that the second rotating member rotates relative to the first rotating member;
• a clutch hub connected to the first rotating member such that the clutch hub does not rotate relative to the first rotating member;
• a clutch drum connected to the second rotating member;
• a plurality of friction engagement elements configured to alternately engage with the clutch hub and the clutch drum, the plurality of friction engagement elements being configured to engage with the clutch hub such that the plurality of friction engagement elements do not rotate relative to the clutch hub when the plurality of friction engagement elements engages with the clutch hub, the plurality of friction engagement elements being configured to engage with the clutch drum such that the plurality of friction engagement elements do not rotate relative to the clutch drum when the plurality of friction engagement elements engages with the clutch drum,
• the plurality of friction engagement elements being overlapped with each other and configured to frictionally engage together;
• a piston configured to press on the plurality of friction engagement elements;
• a piston driving device configured to drive the piston, the piston driving device being configured to press the piston against the plurality of friction engagement elements such that the first rotating element and the second rotating element become selectively connected together by friction between the plurality of friction engagement elements,
• the clutch hub including a clutch hub main body and an inner hub, the clutch hub main body being connected to the first rotating member such that the clutch hub main body does not rotate relative to the first rotating member, the inner hub being configured to rotate relative to the clutch hub main body, the inner hub engaging with an inner peripheral side of the friction engagement elements such that the inner hub does not rotate relative to the friction engagement elements;
• and
• a sleeve configured to not rotate relative to the inner hub, and the sleeve being configured to move relative to the first rotating member in a rotational axis direction of the first rotating member, the sleeve being configured to move in conjunction with the piston to a position where the sleeve engages with the clutch hub main body and does not rotate relative to the clutch hub main body.