Driving system for an electric vehicle

A driving system for an electric vehicle, the electric vehicle having a vehicle body, a left-hand wheel, a right-hand wheel, an AC motor, an inverter and a battery, the AC motor having a primary side and a secondary side, the primary side of said AC motor having a coil and a core and the secondary side of said AC motor having a rotor, the AC motor being coupled to the inverter and the battery being used as a power source for the inverter, the driving system comprising:

• a motor frame fixedly mounted on the vehicle body:
• a core frame to which the core and coil of the primary side of the AC motor is fixedly secured;
• means for separately rotatably supporting the core frame and the rotor, said core frame and said rotor being arranged on a first common axis with respect to said motor frame;
• a first power transmission shaft for transmitting power to one of said left-hand and right-hand wheels;
• means for operatively connecting said rotor to the first power transmission shaft, a direction of rotation of said first power transmission shaft being reversed from a direction of rotation of said rotor, and a rotational speed of said first power transmission shaft being reduced from a rotational speed of said rotor;
• a second power transmission shaft for transmitting power to the other one of said left-hand and right-hand wheels;
• means, comprising an external gear and an internal gear meshing with said external gear, for operatively connecting said core frame to the second power transmission shaft, a direction of rotation of said second power transmission shaft being the same as a direction of rotation of said core frame, and a rotational speed of said second power transmission shaft being reduced from a rotational speed of said core frame;
• and
• means for feeding electricity from said battery to said coil on the primary side of said AC motor via said inverter,
• wherein the first and second power transmission shafts are coaxially supported with respect to the motor frame on a second common axis, the second common axis being parallel to the first common axis.

A driving system for an electric vehicle, the electric vehicle having a vehicle body, a left-hand wheel, a right-hand wheel, an AC motor, an inverter and a battery, the AC motor having a primary side and a secondary side, the primary side of said AC motor having a coil and a core and the secondary side of said AC motor having a rotor, the AC motor being coupled to the inverter and the battery being used as a power source for the inverter, the driving system comprising:

• a motor frame fixedly mounted on the vehicle body;
• a core frame to which the core and coil of the primary side of the AC motor is fixedly secured, said motor frame separately rotatably supporting the core frame and the rotor, said core frame and said rotor being arranged on a first common axis with respect to said motor frame;
• means, comprising an external gear and an internal gear, for operatively connecting said rotor to a second power transmission shaft for one of a left-hand wheel and a right-hand wheel, the external gear meshing with the internal gear, a direction of rotation of said second power transmission shaft being the same as a direction of rotation of said rotor and a rotational speed of said second power transmission shaft being reduced from a rotational speed of said rotor;
• means for operatively connecting said core frame to a first power transmission shaft for the other one of said left-hand wheel and said right-hand wheel, a direction of rotation of said first power transmission shaft being reversed with respect to a direction of rotation of said core frame and a rotational speed of said first power transmission shaft being reduced from a rotational speed of said core frame;
• and
• means for feeding electricity from said battery to said coil on the primary side of said AC motor via said inverter,
• wherein the first and second power transmission shafts are coaxially supported with respect to the motor frame on a second common axis, and the second common axis is parallel to the first common axis.