Electric drive axle system
AssigneeDeere & Company
InventorDaryl T. Brown
Life of this patent
Estimating the term…
Abstract
An electric drive axle system has an integral electric machine. An axle system includes a pair of output shafts and a motor with a rotor shaft disposed in line with the output shafts. A gearset is coupled between the rotor shaft and one output shaft. Another gearset is coupled between the rotor shaft and the other output shaft. Each gearset has a sun gear meshing with a set of planet gears supported on a carrier. The rotor shaft is fixed to the sun gears and the output shafts are fixed to the carriers. A clutch may alternately prevent or allow rotation of ring gears of the gearsets.
Claims20
An axle system comprising:
- a first output shaft;
- a second output shaft;
- a motor having a rotor shaft disposed in line with the first and second output shafts;
- a first planetary gearset coupled between the rotor shaft and the first output shaft and having a first sun gear meshing with a first set of planet gears supported on a first carrier;
- and
- a second planetary gearset coupled between the rotor shaft and the second output shaft and having a second sun gear meshing with a second set of planet gears supported on a second carrier;
- wherein the rotor shaft is fixed to the first and second sun gears, the first output shaft is fixed to the first carrier, and the second output shaft is fixed to the second carrier.
An axle system comprising:
- a first output shaft configured to drive a first wheel;
- a second output shaft configured to drive a second wheel;
- a motor configured to drive the first and second output shafts;
- a first planetary gearset coupled between the rotor shaft and the first output shaft and having a first sun gear meshing with a first set of planet gears supported on a first carrier;
- and
- a second planetary gearset coupled between the rotor shaft and the second output shaft and having a second sun gear meshing with a second set of planet gears supported on a second carrier;
- wherein the rotor shaft is connected with the first and second sun gears, the first output shaft is connected with the first carrier and the second output shaft is connected with the second carrier.
An axle system comprising:
- a first output shaft configured to drive a first wheel;
- a second output shaft configured to drive a second wheel;
- a motor having a rotor shaft disposed in line with the first and second output shafts, the motor configured to drive the first and second output shafts;
- a first planetary gearset coupled between the rotor shaft and the first output shaft and having a first sun gear meshing with a first set of planet gears supported on a first carrier and meshing with a first ring gear;
- and
- a second planetary gearset coupled between the rotor shaft and the second output shaft and having a second sun gear meshing with a second set of planet gears supported on a second carrier and meshing with a second ring gear, wherein the rotor shaft is fixed to the first and second sun gears, the first output shaft is fixed to the first carrier and the second output shaft is fixed to the second carrier;
- an idler gear meshing with the first ring gear;
- a first differential gear meshing with the idler gear;
- a second differential gear meshing with the second ring gear;
- a differential shaft fixed to the first and second differential gears;
- and
- a clutch connected with the differential shaft, the clutch configured to alternately engage to prevent the ring gears from turning requiring the first and second wheels to rotate at a common speed, or to disengage to release the first and second ring gears to turn, enabling the first and second wheels to rotate relative to one another.
Dependencies are inferred from the claim text.