CLUTCH WITH BACK TORQUE LIMITER

摘要

A clutch (3) includes: a clutch housing (32) which is provided with a drive plate (33) to be movable in an axial direction; a clutch hub (34) which transmits a rotary motive power to an output shaft; a clutch sleeve (35) which is provided with a driven plate (36) to be movable in the axial direction; and a pressure disk (40) which biases the drive plate (33) and the driven plate (36) toward the clutch hub (34), further includes a back torque limiter (7) which moves the pressure disk (40) in a direction away from the clutch hub (34) when back torque is applied, and the clutch hub (34) is provided with a restricting apparatus which restricts movement of the pressure disk (40) in the direction away from the clutch hub (34) when a number of rotations of the output shaft is less than a predetermined value.

主权项

1. A clutch with a back torque limiter, the clutch comprising:
a housing which is provided with a drive plate to be movable in an axial direction and to which a rotary motive power is transmitted from a driving force source; a hub which transmits the rotary motive power to an output shaft; a sleeve which is provided with a driven plate to be movable in the axial direction and which transmits the rotary motive power from the housing to the hub when the driven plate is pressed against the drive plate; and a pressure disk which is movable in the axial direction and biases the drive plate and the driven plate toward the hub, and further comprising: a back torque limiter which moves the pressure disk in a direction away from the hub to reduce a biasing force on the drive plate and the driven plate when back torque is applied from the output shaft; and a restricting apparatus which restricts movement of the pressure disk in the direction away from the hub when a number of rotations of the output shaft is less than a predetermined value, wherein the restricting apparatus is provided on the hub or the sleeve.