Patent ID: 9030064
Filing Date: 2015-05-12
Classification: H02K

Abstract:
1. A totally-enclosed fan-cooled motor comprising: a stator arranged in a frame; a rotor that is attached to a rotation shaft and is arranged to face the stator; a drive side bracket that is arranged at one end of the frame and supports the rotation shaft; a counter drive side bracket that is arranged at another end of the frame and supports the rotation shaft; a pair of bearings that support a drive side and a counter drive side of the rotation shaft; an external fan that is arranged on an outer side of the counter drive side bracket, is mounted on the rotation shaft, and sends cooling air from an outside to the stator; an internal fan that is arranged in the frame and sends air in the motor to the rotor and the stator by circulating the air; a disk-shaped heat radiator that is arranged on an outer side of the drive side bracket and is mounted on the rotation shaft; a cover that has a cylindrical shape, contains a joint, which connects the rotation shaft extending to an outer side of the drive side bracket of the motor and a reduction gear, and is provided in parallel with the joint; and a ventilation path that is arranged between the drive side bracket and an end of the cover, takes in outside cooling air, and includes an outlet that causes the cooling air induced to a portion on an extension in a circumferential direction by rotation of the heat radiator to flow to the heat radiator and discharges the cooling air outside the motor.