US 12,451,755 B2
Rotary electric machine with stator and oil injection port
Taku Uematsu, Tokyo (JP)
Assigned to MEIDENSHA CORPORATION, Tokyo (JP)
Appl. No. 18/694,235
Filed by MEIDENSHA CORPORATION, Tokyo (JP)
PCT Filed Aug. 24, 2022, PCT No. PCT/JP2022/031826
§ 371(c)(1), (2) Date Mar. 21, 2024,
PCT Pub. No. WO2023/047875, PCT Pub. Date Mar. 30, 2023.
Claims priority of application No. 2021-154029 (JP), filed on Sep. 22, 2021.
Prior Publication US 2024/0333081 A1, Oct. 3, 2024
Int. Cl. H02K 1/32 (2006.01); H02K 5/20 (2006.01); H02K 9/19 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 1/32 (2013.01); H02K 9/19 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A rotary electric machine comprising:
a rotor;
a shaft that penetrates the rotor along a rotation axis and is pivotally supported by a bearing, the shaft comprising a delivery portion including an inclined surface protruding in a radial direction;
a stator having a cylindrical shape, the rotor being accommodated inside the stator, and the stator having a coil wound around an inner peripheral side;
a rotor cover attached to an axial end surface of the rotor; and
a casing having a flow passage for supplying oil to the bearing,
wherein the rotor cover has an oil receiving portion that protrudes axially in an axial direction with respect to the rotor cover and covers an exterior of the inclined surface of the shaft and is disposed opposite the inclined surface,
wherein a concentric clearance is formed between the oil receiving portion and the inclined surface, the concentric clearance configured to store oil received from the bearing,
wherein the oil receiving portion has an injection port for injecting the oil guided to the concentric clearance toward an inner periphery of the coil by centrifugal force, and
wherein a distal end of the oil receiving portion protruding in the axial direction is adjacent to the bearing in the axial direction such that the distal end of the oil receiving portion opposes the bearing.