Electric drive axle gear train and method for manufacturing said gear train
AssigneeDana Automotive Systems Group, LLC
InventorEric M. Engerman
Life of this patent
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Abstract
Methods and systems for an electric drive axle of a vehicle are provided. A gear train in an electric drive axle system includes, in one example, an input shaft configured to rotationally couple to an electric motor-generator and including a first gear and an intermediate shaft including a second gear rotationally coupled to the first gear and a third gear and a fourth gear each configured to rotationally couple to a separate gear on an output shaft. In this example, the second gear, the third gear, and the fourth gear have different sizes, the third gear includes an axial extension having at outer surface, and an interior surface of the second gear circumferentially surrounds at least a portion of the outer surface of the axial extension.
Claims15
A multi-speed gear train in an electric drive system, comprising:
- an input shaft configured to rotationally couple to an electric motor-generator and including a first gear;
- and
- an intermediate shaft including:
- a second gear rotationally coupled to the first gear;
- a third gear and a fourth gear;
- and
- a planetary gear set coupled to an output shaft and a differential;
- wherein the second gear, the third gear, and the fourth gear have different sizes;
- wherein the output shaft includes a first clutch assembly configured to selectively rotationally couple a fifth gear to the output shaft;
- wherein the output shaft includes a second clutch assembly configured to selectively rotationally couple a sixth gear to the output shaft;
- wherein the fifth gear meshes with the fourth gear;
- wherein the sixth gear meshes with the third gear;
- wherein the planetary gear set includes a sun gear that is directly coupled to the output shaft;
- wherein the planetary gear set includes a carrier coupled to a case of the differential;
- wherein the planetary gear set includes a ring gear;
- and
- wherein the ring gear is fixedly coupled to a housing of the electric motor-generator.
A multi-speed gear train system in an electric axle, comprising:
- an input shaft configured to rotationally couple to an electric motor-generator and including a first gear;
- and
- an intermediate shaft including:
- a second gear rotationally coupled to the first gear;
- a third gear and a fourth gear;
- and
- a planetary gear set that is coupled and arranged coaxial to an output shaft;
- wherein a ring gear in the planetary gear set is fixedly coupled to a housing of the electric motor generator;
- wherein the second gear, the third gear, and the fourth gear have different sizes;
- wherein the output shaft includes a first clutch assembly configured to selectively rotationally couple a fifth gear to the output shaft;
- wherein the output shaft includes a second clutch assembly configured to selectively rotationally couple a sixth gear to the output shaft;
- wherein the fifth gear meshes with the fourth gear;
- wherein the sixth gear meshes with the third gear;
- and
- wherein the input shaft, the intermediate shaft, and the output shaft are parallel to one another.
Dependencies are inferred from the claim text.