Drive mechanism for electric car
AssigneeAisin Aw Co., Ltd.
InventorsMasahiro Hasebe, Satoru Wakuta
Life of this patent
Estimating the term…
Abstract
A drive mechanism for an electric car which has a plurality of motors arranged in a drive mechanism case which, in turn rotatably supports a shaft at two points. This shaft transmits the rotation generated by the motors to drive shafts for rotation of the wheels to run the car. The motors are composed of stators having armature cores and coils, and rotors. The stators are fixed in the drive mechanism case and the rotors are supported by the shaft. Since this shaft is rotatably supported at two points by the drive mechanism case, accurate centering of the rotor is maintained.
Claims12
A drive mechanism for a wheeled electric car, comprising:
- a drive case including first and second internal partitions;
- first and second drive shafts, mounted in said drive mechanism, for transmitting rotation to respective wheels;
- a single motor output shaft having cylindrical portions extending around said drive shafts and a body portion joining said cylindrical portions, said motor output shaft being rotatably supported at two points by said internal partitions for transmitting rotation to said drive shafts;
- a plurality of motors arranged coaxially in said drive mechanism case for rotatably driving said single motor output shaft, each of said motors including an armature coil, a rotor and a stator, said stators being fixed to said drive mechanism case and said rotors being connected to said motor output shaft and arranged radially and internally within said stator;
- and
- a differential mechanism, located within said body portion, for receiving and differentiating the rotation transmitted from said single motor output shaft and transmitting differentiated separate rotary outputs to said first and second drive shafts.
A drive mechanism for a wheeled electric car comprising:
- a drive mechanism case including first and second internal partitions;
- first and second drive shafts mounted in said drive mechanism case for transmitting rotation to respective wheels;
- plural motors arranged coaxially in said drive mechanism case, each of said motors including an armature coil, a rotor and a stator, said stators being fixed to said drive mechanism case and said rotor being arranged radially and internally within respective stators;
- a differential mechanism case having cylindrical portions connected to said rotors and extending around said drive shafts and a body portion joining said cylindrical portions, said cylindrical portions being rotatably supported, respectively, by said internal partitions for transmitting rotation to said drive shafts;
- a differential mechanism located in said body portion, for receiving and differentiating the rotation, transmitted from said plural motors through said differential mechanism case, and for transmitting differentiated separate rotary outputs to said first and second drive shafts;
- a parking gear on said differential mechanism case;
- and
- means for selectively locking said parking gear.
Dependencies are inferred from the claim text.