Aisin Aw Co., Ltd.

Takeo Arai

Kazumichi Kayama

Kazumasa Tsukamoto

Kazuhisa Ozaki

Nobutada Sugiura

Tomochika Inagaki

Michimasa Tanaka

Shundo Yamaguchi

An automatic transmission that includes a case; and a range shift device that includes: a housing with an opening portion on one side, a motor that produces a driving force based on a signal from a manually operated shift operating device, and a mechanical transmission that transmits the driving force of the motor to a manual valve, wherein the range shift device shifts a running range in accordance with a shift position of the manual valve, and the case has a joining portion that closes the opening portion of the housing.

Automatic transmission and running range switching device

A first planetary gear unit PR and a clutch Cfor outputting reduced speed rotation are located on one axial side of a second planetary gear unit PU, and a clutch Cfor connecting and disconnecting an input shaftto/from a sun gear Sand a clutch Cfor connecting and disconnecting the input shaftinput to/from a carrier CRare located on the other axial side of the second planetary gear unit PU. An output mechanism is located between the first and second planetary gear units. As compared with a drivetrain wherein the clutch Cor clutch Cis located between the two planetary gear units, the two planetary gear units can be located closer together, and a transmitting member that transmits the reduced speed rotation can be made shorter. Further, compared to a drivetrain wherein the clutches C, C, Care located together on one axial side, the oil supply to the hydraulic servos can be simplified.

Automatic speed changer

A reduced rotation output unit for outputting a reduced rotation obtained by reducing rotation of an input shaft is arranged at one side of a planetary gear unit in an axial direction, a first clutch and a second clutch interposed between a second rotation element of the planetary gear unit, and a third rotation element and the input shaft are arranged at the other side of the planetary gear unit in the axial direction, and an output member is arranged between the first clutch, the second clutch and the planetary gear unit. Accordingly, it is possible to position the reduced rotation output unit and the planetary gear unit close to each other, and it is possible to make a transmission member that transmits the reduced rotation output from the reduced rotation output unit to the planetary gear unit short.

Automatic transmission

Growing community of inventors

Anjo, Japan

Takeo Arai