Patent ID: 9618084
Date: 2017-04-11
CPC Classifications: B60K,B62D,F16H

Claim:
1. A drive assembly receiving rotational power from an input shaft rotatable about a rotation axis, the drive assembly comprising: a drive housing; a first stage planetary gear set contained in the drive housing, the first stage planetary gear set including a first stage sun gear configured to couple to the input shaft to turn a plurality of first stage planet gears rotatably mounted to a first stage planet carrier that turns with respect to a first stage ring gear that is fixed with respect to the drive housing; a second stage planetary gear set contained in the drive housing, the second stage planetary gear set including a second stage sun gear turned by the first stage planet carrier to turn a plurality of second stage planet gears rotatably mounted to a second stage planet carrier that is fixed with respect to the drive housing and about which turns a second stage ring gear; and an output hub rotated about the rotation axis with respect to the drive housing by rotation of the second stage ring gear on the second stage planet carrier; wherein the drive housing has an annular outer surface that provides a bearing mount for a bearing mounting the output hub for rotation with respect to the drive assembly; wherein the bearing mount provides a plane of rotation about which the bearing is mounted symmetrically; and wherein the output hub includes a sprocket flange for mounting an output sprocket, the output sprocket being centered on the plane of rotation.