A centrifugal clutch device includes a drive plate, a clutch outer, a clutch part, an output member, a one-way clutch, and a torque limiter. The clutch part transmits torque between the drive plate and the clutch outer in certain conditions, while being configured not to transmit torque between the drive plate and the clutch outer in other conditions. The one-way clutch is disposed between the drive plate and the clutch outer. The one-way clutch transmits torque therethrough from the clutch outer to the drive plate and does not allow transmission of torque from the drive plate to the clutch outer. The torque limiter does not transmit torque therethrough between the clutch outer and the output member when the torque has a magnitude greater than or equal to a predetermined value.

During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.

A winch includes a rotary drum, a cable which can be wound on the drum in multiple layers, and a brake for braking the rotation of the drum, the brake being calibrated to permit the rotation of the drum beyond a variable torque which decreases as the length of the cable wound on the drum increases.

During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.

During movement of a mass of a centrifugal clutch a radially inner position to a radially outer position and a resulting increase in torque transmitted from an input gear to an output shaft, a power transmission apparatus includes a first torque region where the apparatus restricts operation of a pressing assist cam and a second torque region where the apparatus allows operation of the pressing assist cam.