Patent ID: 6796548
Filing Date: 2004-09-28
Classification: B66D

Abstract:
An arrangement, comprising:a rotatable brake wheel; a pair of rotation shafts; a pair of brake arms, the brake arms being rotatably supported through the rotation shafts; a pair of brake pads each arranged at one end of the corresponding brake arm, the brake pads contacting and separating from the brake wheel; a brake part connected to another end of the brake arms, the brake part providing and releasing a braking force of the brake pads; a sheave on which a rope is wound, the rope supporting an object to be supported; and a stationary part and a rotary part, the stationary part comprising a shank, a stationary frame integrally formed with the shank, and a motor rotator provided to the stationary frame, the rotary part comprising a rotary frame rotatably supported to the shank through a bearing to face the stationary frame, the sheave integrally formed with the rotary frame on the side opposite to the stationary frame, a motor rotator arranged at an outer periphery of the rotary frame to face the motor stator, and the brake wheel integrally formed with an outer periphery of the rotary frame and having larger diameter than that of the sheave, and wherein, when centers of the rotation shafts are fulcrums, centers of contact of the brake pads with the brake wheel are points of action, and connections between the brake arms and the brake part are power points, the fulcrums, the points of action, and the power points being located in a lower semicircular area of the brake wheel.