In-wheel motor capable of efficiently cooling electric motor and reduction gear
AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha
InventorsRyoji Mizutani, Atsushi Torii, Shigetaka Isogai
Life of this patent
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Abstract
An in-wheel motor includes a wheel disc, a wheel hub, a case, a motor, a planetary gear and a shaft. The wheel disc is connected to the wheel hub. The planetary gear is connected to the motor's rotor. The case includes subcases and a diaphragm. One subcase is arranged to have a side portion closer to the vehicle's body and accommodates the motor and the planetary gear. The motor and the planetary gear are adjacently arranged and fixed to one subcase. The other subcase is arranged closer to the wheel disc and fixed at a plane perpendicular to the shaft by a screw to one subcase.
Claims15
An in-wheel motor comprising:
- an electric motor;
- a reduction gear arranged adjacent to said electric motor to change an output of said electric motor in speed;
- a wheel rotated by an output of said reduction gear;
- a rotation shaft transmitting said output of said reduction gear to said wheel;
- and
- a case accommodating said electric motor and said reduction gear, said case including a first case arranged farther from said wheel, and a second case arranged closer to said wheel and connected to said first case at a plane perpendicular to said rotation shaft, said electric motor being fixed to said first case and said reduction gear being fixed directly to said first case.
An in-wheel motor comprising:
- an electric motor;
- a reduction gear coaxial with said electric motor to reduce an output of said electric motor;
- a wheel rotated by an output of said reduction gear;
- a rotation shaft transmitting said output of said reduction gear to said wheel;
- and
- a case accommodating said electric motor and said reduction gear, said case including a first case arranged farther from said wheel and closer to a vehicle's body, second case arranged closer to said wheel and fixed to said first case at a plane perpendicular to said rotation shaft, and a path that allows said electric motor and said reduction gear to be in direct thermally-conductive communication with said first case and does not include said second case.
An in-wheel motor comprising:
- an electric motor;
- a reduction gear arranged adjacent to said electric motor to change an output of said electric motor in speed;
- a wheel rotated by an output of said reduction gear;
- a rotation shaft transmitting said output of said reduction gear to said wheel;
- and
- a case accommodating said electric motor and said reduction gear, said case including a first case arranged farther from said wheel, and a second case arranged closer to said wheel and connected to said first case at a plane perpendicular to said rotation shaft, wherein
- said electric motor and said reduction gear are fixed to said first case, said reduction gear is fixed directly to said first case, and
- said electric motor and said reduction gear are aligned in said first case in an axial direction of said rotation shaft.
An in-wheel motor comprising:
- an electric motor;
- a reduction gear coaxial with said electric motor to reduce an output of said electric motor;
- a wheel rotated by an output of said reduction gear;
- a rotation shaft transmitting said output of said reduction gear to said wheel;
- and
- a case accommodating said electric motor and said reduction gear, said case including a first case arranged farther from said wheel and closer to a vehicle's body, and a second case arranged closer to said wheel and fixed to said first case at a plane perpendicular to said rotation shaft, said electric motor and said reduction gear being arranged in said first case and being in direct thermally-conductive communication with said first case, said first case being integrally molded.
Dependencies are inferred from the claim text.