Patent ID: 9729027
Date: 2017-08-08
CPC Classifications: H02K

Claim:
1. A cooling structure of a rotary electric machine that includes a rotating shaft, a rotor provided on the rotating shaft, and a stator that faces an outer periphery of the rotor and includes a coil end provided in an end portion of the stator in an axial direction of the rotating shaft, the cooling structure comprising a coolant passage that is included in the rotating shaft and through which coolant flows, wherein the coolant passage includes a squirt hole, of which an opening portion is positioned on an outer peripheral surface of the rotating shaft and is positioned at an outside of the coil end in the axial direction, and the squirt hole is configured to directly squirt the coolant to the coil end in an angle so that the coolant striking the coil end is distributed onto an outmost portion of the coil end in the axial direction and in a direction toward a center of the stator in the axial direction.