| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cooling path structure for motors capable of forming a motor cooling passage by forming an annular cooling medium groove provided with a cooling medium inlet on an inner wall surface of a motor housing where a motor is housed and by covering the cooling medium groove with a ring-shaped closing plate formed so that a plurality of cooling medium exhaust nozzles are directed toward a motor side, and of ensuring a sealing performance of the ring-shaped closing plate to the motor housing without increasing the number of bolts for fixing the ring-shaped closing plate. <P>SOLUTION: An annular oil groove (an annular groove) 20 is formed in a wavy shape on the circumference whose center is a rotation axis. An inside curved part 20a is formed closely to a radial inside of a plurality of bolt holes 26. An outside curved part 20b is formed so as to face an interval between the adjacent bolt holes 26. Further, to a ring-shaped closing plate 22, bolt penetration holes 27 are formed on the circumference so as to correspond to the bolt holes 26, and oil exhaust holes (cooling medium exhaust nozzles) 28 connected to the outside curved part 20b of the oil groove (the annular groove) 20 are formed in a circumference direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
