Patent ID: 9739346
Date: 2017-08-22
CPC Classifications: F16H

Claim:
1. A multi-speed transmission that transfers power, which has been transferred from a motor of a vehicle to an input member, to an output member with a speed of the power changed, the multi-speed transmission comprising: a Ravigneaux planetary gear mechanism that has an input element, a fixable element, a first output element, and a second output element; a first planetary gear set that has a plurality of rotary elements; a second planetary gear set that has a plurality of rotary elements and that is disposed in proximity to the Ravigneaux planetary gear mechanism with respect to the first planetary gear set; a first brake that connects the fixable element of the Ravigneaux planetary gear mechanism to a stationary member to hold the fixable element stationary such that the fixable element is unrotatable, and that disconnects the fixable element and the stationary member from each other; a first clutch that connects between the first output element of the Ravigneaux planetary gear mechanism and at least one of the rotary elements of the first and second planetary gear sets, and that disconnects the first output element and the rotary element of the first and second planetary gear sets from each other; and a second clutch that connects between the second output element of the Ravigneaux planetary gear mechanism and at least one of the rotary elements of the first and second planetary gear sets, and that disconnects the second output element and the rotary element of the first and second planetary gear sets, from each other, wherein the Ravigneaux planetary gear mechanism transfers the power, which has been transferred to the input element, to the first and second output elements with the speed of the power increased such that a rotational speed of the second output element is higher than a rotational speed of the first output element when the fixable element is held stationary by the first brake so as to be unrotatable; and the second clutch is disposed between the Ravigneaux planetary gear mechanism and the second planetary gear set in an axial direction of the input member.