Roller disk brake for a winch

A brake mechanism for use in a power device, said brake mechanism comprising:

• a motor outputting a driving torque in a first and a second rotary direction;
• a cam member coupled with an output of said motor for rotation therewith, said cam member having a cam surface;
• a drive shaft operably coupled with said cam member for rotation therewith, said drive shaft having a cam follower engaging said cam surface operable to position said drive shaft in a first position when said motor is driven in said first rotary direction and a second position when said motor is driven in said second rotary direction;
• a stationary member fixed against rotation;
• a brake disk engaging said stationary member to produce a frictional braking force when said drive shaft is in said first position, said brake disk disengaging said stationary member when said drive shaft is in said second position;
• and
• a one-way clutch coupled between said drive shaft and said brake disk, said one-way clutch being operable in a free spinning mode when said motor is driven in said first rotary direction to permit relative rotation between said drive shaft and said brake disk and in a locked mode when said motor is driven in said second rotary direction to prevent relative rotation between said drive shaft and said brake disk.

A brake mechanism comprising:

• a motor having an output shaft outputting a driving torque in a first and a second rotary direction;
• a drive shaft;
• camming means for coupling said drive shaft and said output shaft for fixed rotation, said camming means operable to position said drive shaft in a first position when said output shaft is driven in said first rotary direction and a second position when said output shaft is driven in said second rotary direction;
• braking means for producing a frictional braking force when said drive shaft is in said first position and for permitting free rotation when said drive shaft is in said second position;
• and
• a one-way clutch coupled between said drive shaft and said braking means, said one-way clutch being operable in a free spinning mode when said output shaft is driven in said first rotary direction to permit relative rotation between said drive shaft and said braking means and in a locked mode when said output shaft is driven in said second rotary direction to prevent relative rotation between said drive shaft and said braking means.

A brake mechanism comprising:

• a motor having an output shaft outputting a driving torque in a first and a second rotary direction;
• a drive shaft;
• a camming device operably coupling said drive shaft and said output shaft for fixed rotation, said camming device operable to position said drive shaft in a first position when said output shaft is driven in said first rotary direction and a second position when said output shaft is driven in said second rotary direction;
• a brake device operably producing a frictional braking force when said drive shaft is in said first position and permitting free rotation when said drive shaft is in said second position;
• and
• a one-way clutch coupled between said drive shaft and said brake device, said one-way clutch being operable in a free spinning mode when said output shaft is driven in said first rotary direction to permit relative rotation between said drive shaft and said brake device and in a locked mode when said output shaft is driven in said second rotary direction to prevent relative rotation between said drive shaft and said brake device.