Patent ID: 8002099

Claim:
A clutch operation mechanism comprising: a clutch disengaging and engaging portion having a mechanism for disengaging and engaging a clutch; a clutch lever adapted to manually apply an operating force to the clutch disengaging and engaging portion; an electric motor capable of automatically applying a drive force to the clutch disengaging and engaging portion; a turn-operating force transmitting member which turns in linkage with operation of the clutch lever to enable transmission of an operating force to the clutch disengaging and engaging portion or with driving of the electric motor to enable transmission of a drive force to the clutch disengaging and engaging portion; a first lost mechanism which is located between the clutch lever and the turn-operating force transmitting member to interrupt, from the clutch lever side, an operated-force applied from the turn-operating force transmitting member due to the driving of the electric motor when the clutch lever is not operated; and a second lost mechanism which is located between the electric motor and the turn-operating force transmitting member to interrupt, from the electric motor side, an operated-force applied from the turning operating force transmitting member due to the operation of the clutch lever when the electric motor is not operated, wherein the clutch disengaging and engaging portion includes: an operating cylinder connected to the clutch to perform disengaging and engaging operation of the clutch; a master cylinder for allowing the operating cylinder to generate hydraulic pressure; a hydraulic line for connecting the operating cylinder with the master cylinder respectively; and an opening and closing control valve is provided on the hydraulic line.