A reverse rotation prevention mechanism is provided on a torque transmission path between an output shaft and a driving shaft of a motor. The reverse rotation prevention mechanism includes: a first frictional force generation unit configured to inhibit a lock plate provided on the torque transmission path from rotating relative to another member when an external force is exerted on the output shaft; and a second frictional force generation unit configured to generate a braking force that prevents reverse rotation when an external force is exerted on the output shaft by causing a portion of the lock plate to be pressed. The first frictional force generation unit is provided in an area different from the second frictional force generation unit.

A reverse rotation prevention mechanism is provided on a torque transmission path between an output shaft and a driving shaft of a motor. The reverse rotation prevention mechanism includes: a first frictional force generation unit configured to inhibit a lock plate provided on the torque transmission path from rotating relative to another member when an external force is exerted on the output shaft; and a second frictional force generation unit configured to generate a braking force that prevents reverse rotation when an external force is exerted on the output shaft by causing a portion of the lock plate to be pressed. The first frictional force generation unit is provided in an area different from the second frictional force generation unit.

A braking assembly is disclosed comprising a shaft, a brake cage being rotatable with the shaft, an earth ring extending circumferentially around the brake cage, at least one engagement member coupled to the shaft, and a braking mechanism configured for selectively applying a force to the brake cage for slowing or preventing rotational movement of the brake cage such that the shaft rotates relative to the brake cage, and wherein the braking assembly is configured such that when the shaft rotates relative to the brake cage, said at least one engagement member is urged to engage the earth ring such that rotation of the shaft is inhibited or prevented. The earth ring may be replaced with an output shaft such that the assembly operates as a clutch assembly.

A braking assembly is disclosed comprising a shaft, a brake cage being rotatable with the shaft, an earth ring extending circumferentially around the brake cage, at least one engagement member coupled to the shaft, and a braking mechanism configured for selectively applying a force to the brake cage for slowing or preventing rotational movement of the brake cage such that the shaft rotates relative to the brake cage, and wherein the braking assembly is configured such that when the shaft rotates relative to the brake cage, said at least one engagement member is urged to engage the earth ring such that rotation of the shaft is inhibited or prevented. The earth ring may be replaced with an output shaft such that the assembly operates as a clutch assembly.

A reverse rotation prevention mechanism is provided on a torque transmission path between an output shaft and a driving shaft of a motor. The reverse rotation prevention mechanism includes: a first frictional force generation unit configured to inhibit a lock plate provided on the torque transmission path from rotating relative to another member when an external force is exerted on the output shaft; and a second frictional force generation unit configured to generate a braking force that prevents reverse rotation when an external force is exerted on the output shaft by causing a portion of the lock plate to be pressed. The first frictional force generation unit is provided in an area different from the second frictional force generation unit.

A reverse rotation prevention mechanism is provided on a torque transmission path between an output shaft and a driving shaft of a motor. The reverse rotation prevention mechanism includes: a first frictional force generation unit configured to inhibit a lock plate provided on the torque transmission path from rotating relative to another member when an external force is exerted on the output shaft; and a second frictional force generation unit configured to generate a braking force that prevents reverse rotation when an external force is exerted on the output shaft by causing a portion of the lock plate to be pressed. The first frictional force generation unit is provided in an area different from the second frictional force generation unit.

A braking assembly is disclosed comprising a shaft, a brake cage being rotatable with the shaft, an earth ring extending circumferentially around the brake cage, at least one engagement member coupled to the shaft, and a braking mechanism configured for selectively applying a force to the brake cage for slowing or preventing rotational movement of the brake cage such that the shaft rotates relative to the brake cage, and wherein the braking assembly is configured such that when the shaft rotates relative to the brake cage, said at least one engagement member is urged to engage the earth ring such that rotation of the shaft is inhibited or prevented. The earth ring may be replaced with an output shaft such that the assembly operates as a clutch assembly.

A friction brake device has a brake rotor that rotates around an axis of rotation, brake pads that can rotate around an axis of autorotation parallel to the axis of rotation, support members that support the brake pads respectively, and pressing devices that press the brake pads against the brake rotor respectively. In the friction brake device, when the brake pads are pressed against the brake rotor, the brake pads revolve around the axis of rotation relatively to the brake rotor while being frictionally engaged with lateral faces of the brake rotor respectively. The support members press the brake pads in a direction perpendicular to the axis of rotation, and frictionally engage outer peripheries of the brake pads with a cylindrical face of the brake rotor respectively. The brake pads auto-rotate around the axis of autorotation upon beginning to be pressed, but come to rest when the pressing force increases.

A friction brake device has a brake rotor that rotates around an axis of rotation, brake pads that can rotate around an axis of autorotation parallel to the axis of rotation, support members that support the brake pads respectively, and pressing devices that press the brake pads against the brake rotor respectively. In the friction brake device, when the brake pads are pressed against the brake rotor, the brake pads revolve around the axis of rotation relatively to the brake rotor while being frictionally engaged with lateral faces of the brake rotor respectively. The support members press the brake pads in a direction perpendicular to the axis of rotation, and frictionally engage outer peripheries of the brake pads with a cylindrical face of the brake rotor respectively. The brake pads auto-rotate around the axis of autorotation upon beginning to be pressed, but come to rest when the pressing force increases.