Disc powertrain with dual-drive or single-drive dual-speed transmission and electric vehicle

A disc powertrain with single-drive dual-speed transmission,

• wherein the disc powertrain is configured to drive a single wheel of an electric vehicle;
• the disc powertrain comprises:
• a gearshift mechanism,
• a first disc motor, and
• a first planetary gear reducer;
• along an axial direction of the disc powertrain, the disc motor is located on a side of the planetary gear reducer that faces away from the wheel;
• and a motor shaft of the disc motor is configured to be in transmission connection with a sun gear of the planetary gear reducer or in transmission connection with a half shaft of the wheel, a planet carrier of the planetary gear reducer is configured to be in transmission connection with the half shaft of the wheel, and the gearshift mechanism is configured to:
• separate the transmission connection between the planet carrier of the planetary gear reducer and the half shaft of the wheel,
• separate the transmission connection between the sun gear of the planetary gear reducer and the motor shaft of the disc motor,
• restore the transmission connection between the motor shaft of the disc motor and the half shaft of the wheel;
• separate the transmission connection between the motor shaft of the disc motor and the half shaft of the wheel,
• restore the transmission connection between the planet carrier of the planetary gear reducer and the half shaft of the wheel, and
• restore a transmission connection between a planetary gear of the planetary gear reducer and the motor shaft of the disc motor.

An electric vehicle, comprising:

• two wheels and
• a disc powertrain, wherein the disc powertrain is configured to drive the two wheels, and the two wheels comprise two front wheels or two rear wheels of the electric vehicle;
• the disc powertrain comprises:
• a gearshift mechanism,
• two disc motors, and
• two planetary gear reducers;
• the two disc motors are coaxially arranged between the two planetary gear reducers along an axial direction of the disc powertrain;
• and a motor shaft of each disc motor is configured to be in transmission connection with a sun gear of one of the planetary gear reducers or in transmission connection with a half shaft of one of the wheels, a planet carrier of each planetary gear reducer is configured to be in transmission connection with a half shaft of one of the wheels, and the gearshift mechanism is configured to:
• separate a transmission connection between a planet carrier of a first planetary gear reducer and a half shaft of a first wheel wheels,
• separate a transmission connection between a sun gear of the first planetary gear reducer and a motor shaft of one of a first disc motor, and
• restore a transmission connection between the motor shaft of the first disc motor and the half shaft of the first wheel;
• or
• two wheels and two disc powertrains, wherein each disc powertrain is configured to drive a single wheel of the two wheels, the disc powertrain comprises a gearshift mechanism, one disc motor, and one planetary gear reducer;
• along an axial direction of the disc powertrain, the disc motor is located on a side that is of the planetary gear reducer and that faces away from the wheel;
• and a motor shaft of the disc motor is configured to be in transmission connection with a sun gear of the planetary gear reducer or in transmission connection with a half shaft of the wheel, a planet carrier of the planetary gear reducer is configured to be in transmission connection with the half shaft of the wheel, and the gearshift mechanism is configured to:
• separate the transmission connection between the planet carrier of the planetary gear reducer and the half shaft of the wheel, separate the transmission connection between the sun gear of the planetary gear reducer and the motor shaft of the disc motor, and restore the transmission connection between the motor shaft of the disc motor and the half shaft of the wheel;
• and
• separate the transmission connection between the motor shaft of the disc motor and the half shaft of the wheel, restore the transmission connection between the planet carrier of the planetary gear reducer and the half shaft of the wheel, and restore a transmission connection between a planetary gear of the planetary gear reducer and the motor shaft of the disc motor.