Patent attributes
A dual braking device for a power winch includes a first braking device and a second braking device, which is composed of a transmitting sleeve, a braking lining, an electromagnetic induction coil, a magnetic conduction member, and an elastic member. When the power winch is electrically connected for retracting or releasing steel ropes, the induction coil will produce magnetic force to attract the magnetic conductive member to move and compress the elastic member, and the braking lining cannot perform braking. When the power winch is electrically disconnected, the electromagnetic induction coil cannot produce magnetic force, and the magnetic conduction member will be actuated by the elastic member to contact with and force the braking lining to stop the rotating shaft and the spindle.
