Supporting structure for planetary gear mechanism

Abstract

The invention provides a supporting structure for a planetary gear mechanism which can inhibit a shaft deviation of a planetary carrier and ensure space at any direction of the planetary gear. A first planetary gear reducer and a second planetary gear reducer in the supporting structure comprises, in a way of a same axis, a sun gear, an inner gear and the planetary carrier which are arranged in a shell, wherein the planetary carrier includes a pinion shaft, an inner arm portion and an outer arm portion. The planetary carrier supports one end of the pinion shaft along bearings (33A, 33B) of an radical bearing and the other end of the pinion shaft along bearings (19A, 19B) and bearings (34A, 34B) of the radical bearing onto the shell. The bearings (33A, 33B), the bearings (19A, 19B) and the bearings (34A, 34B) are configured at one side of the planetary gear in an axial direction, while the other end of the planetary gear in the axial direction does not have bearings that support the planetary carrier to the shell.

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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