Patent ID: 8535195
Filing Date: 2013-09-17
Classification: F16H

Abstract:
1. A transmission device capable of transmitting power applied to an input shaft to an output shaft while changing a speed ratio to a plurality of stages, the transmission device comprising: a single-pinion type first planetary gear mechanism including a first sun gear that is coupled to the input shaft, a first carrier that rotatably supports a first pinion gear that meshes with the first sun gear, and a first ring gear that meshes with the first pinion gear; a single-pinion type second planetary gear mechanism including a second sun gear, a second carrier that rotatably supports a second pinion gear that meshes with the second sun gear, and a second ring gear that is coupled to the first carrier and meshes with the second pinion gear; a third planetary gear mechanism including a rotation element that is coupled to the second sun gear, and a rotation element that is coupled to the output shaft; a case that accommodates the first, second, and third planetary gear mechanisms; a first clutch capable of coupling and uncoupling the input shaft and the second sun gear; a second clutch capable of coupling and uncoupling the input shaft and the second carrier; a first brake capable of holding the first ring gear stationary to the case; and a second brake capable of holding the second ring gear stationary to the case, wherein the first carrier and the second ring gear are coupled together through a coupling member that extends circumferentially inward from the second ring gear, and the second ring gear is coupled to a second brake hub that configures the second brake through the first carrier.