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US 12,600,215 B2Granted
Electric axle with compact electric machine and gear train layout
AssigneeDana Automotive Systems Group, LLC
InventorEric M. Engerman
Life of this patent
Estimating the term…
Abstract
Systems and method for an electric axle assembly. The electric axle assembly includes, in one example, an electric machine rotationally coupled to a planetary differential and a first and second axle shaft directly rotationally coupled to the planetary differential. In the axle assembly, the second axle shaft is longer than the first axle shaft and the electric machine is positioned laterally between a first drive wheel shaft and a second drive wheel shaft that are rotationally coupled to the first axle shaft and the second axle shaft.
Claims20
An electric axle assembly comprising:
- an electric machine rotationally coupled to a planetary differential, wherein a first gear and a second gear are positioned at opposite ends of the electric machine, and wherein a length of the electric machine extends between the first gear and the second gear;
- and
- a first axle shaft and a second axle shaft directly rotationally coupled to the planetary differential;
- wherein the second axle shaft is longer than the first axle shaft, wherein the second axle shaft passes along a longitudinal side of the electric machine without passing through the electric machine;
- wherein the electric machine is positioned laterally between a first drive wheel shaft and a second drive wheel shaft that are rotationally coupled to the first axle shaft and the second axle shaft;
- and
- wherein rotational axes of the first and second drive wheel shafts are offset from rotational axes of the first and second axle shafts.
4 more elements
An electric drive assembly, comprising:
- an electric axle comprising:
- an electric machine rotationally coupled to a planetary differential via a gear reduction;
- wherein the planetary differential is directly rotationally coupled to a first axle shaft and a second axle shaft, wherein the second axle shaft is positioned on a rearward longitudinal side of the electric machine without passing through the electric machine and is longer than the first axle shaft, wherein a first end of the second axle shaft is coupled to a first gear, wherein a second end of the second axle shaft is coupled to a second gear, and wherein the first gear and the second gear are positioned at opposite ends of the electric machine;
- and
- a first wheel end gear reduction rotationally coupling the first axle shaft with a first drive wheel shaft;
- and
- a second wheel end gear reduction rotationally coupling the second axle shaft with a second drive wheel shaft.
4 more elements
A single speed electric beam axle, comprising:
- a traction motor rotationally coupled to a planetary differential via a gear reduction wherein a first gear and a second gear are positioned at opposite ends of the traction motor, and wherein a length of the traction motor extends between the first gear and the second gear;
- wherein the planetary differential is directly rotationally coupled to a first axle shaft and a second axle shaft, and where the second axle shaft is longer that the first axle shaft and passes along a longitudinal side of the traction motor without passing through the traction motor, and wherein a first end of the second axle shaft is coupled to the first gear, wherein a second end of the second axle shaft is coupled to the second gear;
- a first wheel end gear reduction directly rotationally coupled to the first axle shaft;
- and
- a second wheel end gear reduction directly rotationally coupled to the second axle shaft;
- wherein the traction motor is positioned laterally between a first drive wheel shaft and a second drive wheel shaft that are each rotationally coupled to one of the first and second wheel end gear reductions;
- and
- wherein rotational axes of the first and second drive wheel shafts are offset from and parallel to a rotational axis of the traction motor.
5 more elements
Dependencies are inferred from the claim text.