Support structure of planetary gear mechanism

Abstract

A supporting structure for a planetary gear mechanism includes a planetary carrier, a first bearing, and a second bearing. The planetary carrier includes a rotation shaft and an arm portion. The rotation shaft extends in an axis direction to support a planetary gear of the planetary gear mechanism to be rotatable about a rotational axis along the axis direction. The rotation shaft includes a first end and a second end opposite to the first end along the rotational axis. The first and second bearings are disposed on a first side of the planetary gear in the axis direction. The planetary carrier is radially supported by the first and second bearings without a bearing which radially supports the planetary carrier in the casing and which is provided on a second side of the planetary gear in the axis direction.

Description

technical field [0001] The present invention relates to a supporting structure of a planetary gear mechanism provided with a sun gear, an internal gear, and a planetary gear carrier arranged in a case on the same axis, wherein the planetary gear carrier engages with the sun gear and the internal gear The plurality of planetary gears are rotatably supported. Background technique [0002] In Patent Document 1, a driving device for a vehicle is disclosed, such as Figure 6 As shown, a planetary gear mechanism 112A is provided as a speed reducer on the power transmission path between the left rear wheel (not shown) and the motor 102A that drives the left rear wheel, and between the right rear wheel (not shown) and the motor 102A that drives the right rear wheel. A planetary gear mechanism 112B is provided as a transmission on a power transmission path of the electric motor 102B for the rear wheels. [0003] In addition, the following situation is described in Patent Document 2:...

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Problems solved by technology

[0008] In the two planetary gear mechanisms 112A, 112B described in Patent Document 1, one end side of each planetary carrier 123A, 123B is supported by the housing 111 via bearings 133A, 133B, but the wedge of the one-way clutch 150 is arranged on the other end side. The block 153 is not supported by the housing 111, so when the load acts on the planetary gear carriers 123A, 123B, the axis deviation may occur, and the planetary gear carriers 123A, 123B are inclined relative to the axis of rotation.

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