Patent ID: 9685836
Date: 2017-06-20
CPC Classifications: F16C,H02K

Claim:
1. A motor comprising: a rotor including a rotary shaft; a stator arranged at radially outward of the rotor; a bearing which supports the rotary shaft to be able to rotate; a housing which supports the stator and defines an inner space which houses the rotor together with the stator, a bearing support surface arranged to be immovable relative to the housing, and surrounding an outer circumferential surface of the bearing so as to support the bearing, a first groove formed at the outer circumferential surface of the bearing or at the bearing support surface, the first groove being in fluid communication with the inner space at one end of the first groove and with an outside space of the housing at the other end of the first groove, the first groove being formed to make a compressed fluid, which is introduced into the inner space from an external fluid feed device, pass from the one end to the other end so as to be discharged from the other end to the outside space; and a second groove formed at the outer circumferential surface of the bearing or at the bearing support surface, the second groove extending in a circumferential direction of the rotary shaft so as to intersect with the first groove.