Patent ID: 11859704
Assignee: JILIN UNIVERSITY
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 0:
1. An electric drive axle, comprising:
a primary drive motor;
an auxiliary drive motor;
a reducer;
a torque vectoring (TV) coupler;
a power coupling differential;
a housing assembly; and
a power output mechanism;
wherein the primary drive motor is configured as a main power source for driving a vehicle;
the auxiliary drive motor is configured as a TV power source or an auxiliary power source for driving the vehicle;
the reducer is a single-row single-planetary-gear planetary gear mechanism, and is configured for increasing and outputting a torque generated by the primary drive motor;
the TV coupler has three operating modes consisting of a disconnected mode, a TV mode, and a reducer mode; when operating in the disconnected mode, the TV coupler is configured to cut off power transmission of the auxiliary drive motor; when operating in the TV mode, the TV coupler is configured for torque vectoring; and when operating in the reducer mode, the TV coupler is configured to increase and output a torque output from the auxiliary drive motor;
the power output mechanism comprises a first half shaft, a second half shaft, a first flange, and a second flange; and the power output mechanism is configured to output power to wheels of the vehicle;
the power coupling differential has two operating modes consisting of a torque coupling mode and a speed coupling mode; when operating in the torque coupling mode, the power coupling differential is configured to receive power output from the primary drive motor and the auxiliary drive motor, and output the power to the first half shaft and the second half shaft after torque coupling; and when in the speed coupling mode, the power coupling differential is configured to receive the power output from the primary drive motor and the auxiliary drive motor, and output the first half shaft and the second half shaft after speed coupling;
the housing assembly comprises a first end cover, a first housing, a second end cover, and a second housing, and is configured to accommodate the primary drive motor, the auxiliary drive motor, the reducer, the torque vectoring (TV) coupler, the power coupling differential and the power output mechanism;
the electric drive axle has four drive modes consisting of a single-motor drive mode, a TV drive mode, a dual-motor torque coupling drive mode, and a dual-motor speed coupling drive mode; the electric drive axle is configured to be switchable among the four drive modes by controlling operating modes of the TV coupler and the power coupling differential;
when the TV coupler is in the disconnected mode and the power coupling differential is in the torque coupling mode, the electric drive axle operates in the single-motor drive mode, and at this time, the vehicle is driven by the primary drive motor alone, with the driving torque equally distributed between the first half shaft and the second half shaft;
when the TV coupler is in the TV mode and the power coupling differential is in the torque coupling mode, the electric drive axle operates in the TV drive mode, and at this time, the vehicle is driven by the primary drive motor alone, and the power output from the auxiliary drive motor is configured to allow arbitrary distribution of the torque generated by the primary drive motor between the first half shaft and the second half shaft;
when the TV coupler is in the reducer mode and the power coupling differential is in the torque coupling mode, the electric drive axle operates in the dual-motor torque coupling drive mode, and at this time, the auxiliary drive motor is configured to assist the primary drive motor to drive the vehicle together; and
when the TV coupler is in the reducer mode and the power coupling differential is in the speed coupling mode, the electric drive axle operates in the dual-motor speed coupling mode, and at this time, the auxiliary drive motor is configured as a speed control motor of the primary drive motor to participate in driving the vehicle.