Oblon, McClelland, Maier & Neustadt, L.L.P.
Motor cooling device having flow rate adjusting means for a coil end cover
A motor cooling device having good cooling performance, which is adapted to promote heat transfer between a coil end and a coil end cover even if the flowing amount of oil is small. A heat of a stator is withdrawn by the oil flowing around the coil end. For this purpose, the motor cooling device comprises a flow path formed between an outer face of the coil end and an inner face of the coil end cover, and a flow rate adjusting unit for changing a cross-sectional area of the flow path by moving the coil end cover toward the coil end or away from the coil end. The flow rate adjusting unit widens the cross-sectional area of the flow path in case a feeding amount of the oil to the flow path is relatively large, and narrows the cross-sectional area of the flow path in case a feeding amount of the oil to the flow path is relatively small.
TOYOTA JIDOSHA KABUSHIKI KAISHA
H H H H Y H B B H B
H02K H02K H02K H02K Y02T H02K B60L B60L H02K B60L
additional additional additional inventional additional additional additional inventional additional additional
Kensuke Jun-ichi Kazuya
Yoshizue Deguchi Arakawa