Rotatable device powered by continued electricity supply and a windmill using said rotatable device

A rotatable device powered by continued electricity supply, comprising a supporting shaft, a bearing that sleeves the supporting shaft, a rotary body connected to the bearing, a mounting seat mounted on the supporting shaft, an electrical conductive member, and a brush that cooperates with the electrical conductive member;

• the bearing comprises an outer ring and an inner ring that are mutually rotatable with respect to each other;
• the rotary body is connected to the outer ring;
• one of the electrical conductive member and the brush is connected to the rotary body, and another one of the electrical conductive member and the brush is connected to the mounting seat;
• a wiring channel is provided on the supporting shaft for arrangement of wires;
• the supporting shaft is a supporting tube;
• the mounting seat comprises a sleeve portion that sleeves on the supporting tube, a first electrical conductive ring that sleeves on the sleeve portion, an insulating sleeve that sleeves on the sleeve portion, a second electrical conductive ring that sleeves on the sleeve portion, and a position limiting sleeve that sleeves on the sleeve portion;
• the insulating sleeve is positioned between the first electrical conductive ring and the second electrical conductive ring;
• the first electrical conductive ring and the second electrical conductive ring form the electrical conductive member;
• the brush comprises a first brush cooperating with the first electrical conductive ring and a second brush cooperating with the second electrical conductive ring;
• one end of the sleeve portion along an axial direction thereof abuts against an end surface of the inner ring along an axial direction thereof, and another end of the sleeve portion along the axial direction thereof is provided with a position limiting member that prevents the mounting seat from falling off from the supporting tube;
• an outer wall of the supporting tube is provided with a supporting platform;
• one end of the inner ring along the axial direction thereof abuts against the supporting platform, another end of the inner ring along the axial direction thereof abuts against the sleeve portion;
• the sleeve portion is mounted on the supporting tube in a way that the sleeve portion is not rotatable with respect to the supporting tube, the first electrical conductive ring is mounted on the sleeve portion in a way that the first electrical conductive ring is not rotatable with respect to the sleeve portion, and the second electrical conductive ring is mounted on the sleeve portion in a way that the second electrical conductive ring is not rotatable with respect to the sleeve portion;
• an outer wall of the sleeve portion is provided with a first key slot and a second key slot running along the axial direction of the sleeve portion;
• an inner wall of the first electrical conductive ring is provided with a first key that matches with the first key slot;
• an inner wall of the second electrical conductive ring is provided with a second key that matches with the second key slot.