Patent ID: 8375820

Claim:
A hollow actuator with a built-in reduction gear, comprising: a motor section including an output shaft; a reduction gear section including an input shaft provided separately from the output shaft of the motor section; a brake section disposed on a non-load side of the motor section; a rotational position detection section; a hollow shaft that transmits rotation; a bearing on an inner periphery of the brake section; and at least another bearing configured to rotatably support the output shaft of the motor section, the bearing being different from the bearing on the inner periphery of the brake section, wherein the reduction gear section includes a flange adjacent to the motor section, the flange including a recessed portion, wherein the motor section includes a coil disposed in the recessed portion of the flange of the reduction gear section, and wherein every bearing that supports the output shaft of the motor section is disposed on the non-load side of the motor section.