Electrical motor drive apparatus with planetary gearing
AssigneeKabushikikaisha Equos Research
InventorsMutsumi Kawamoto, Satoru Tanaka, Mitsugi Yamashita
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Abstract
A motor drive apparatus for an electric vehicle has a case attached to a vehicle body; an output axle which rotates relative to the case; an electric motor having a magneto stator secured to an inside wall of the case and a rotor which faces the magneto stator with a predetermined clearance and rotates relative to the case; and a planetary gear unit provided inside of the rotor and consisting of three components of a sun gear, a ring gear and a carrier. The electric motor speed is output from the output axle through the planetary gear unit.
Claims9
A motor drive apparatus for a vehicle, comprising:
- a casing attached to the body of the vehicle;
- an output axle rotatably supported by said casing for rotation relative to said casing;
- an electric motor including a magneto stator secured to an inside wall of said casing and a rotor concentric with the magneto stator with a predetermined clearance therebetween;
- first support means, within said casing, for rotatably supporting said rotor for rotation relative to said casing and attached between said casing and said rotor;
- a planetary gear unit provided inside of the rotor and comprising a sun gear, a ring gear and a carrier, said ring gear being fixed to said casing, said carrier engaging said ring gear and said sun gear, revolving around the sun gear and connected to and driving said output axle;
- a connecting member, attached to both said sun gear and said rotor, for fixing said sun gear relative to said rotor;
- and
- second support means, within said casing, for rotatably supporting said sun gear for rotation relative to said casing and attached between said casing and said sun gear.
Dependencies are inferred from the claim text.