Automatic transmission

Patent metadata

Field	Value
Publication number	US-2016290504-A1
Application number	US-201415031662-A
Country	US
Kind code	A1
Filing date	Dec 24, 2014
Priority date	Dec 25, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

A hydraulic control device is disposed forward of a case housing a speed change mechanism in an on-vehicle state. A detent lever is fixed to the control shaft, has a first end connected to a parking rod, and includes a detent recess with which a detent mechanism is engaged. A swing lever includes a shaft serving as a swing center, a first extension extending from one end of the shaft, and a second extension extending from the other end of the shaft. The first extension is connected to a second end of the detent lever. The second extension is connected to a manual valve. An axial position of the manual valve changes in accordance with a rotation angle of the control shaft.

First claim

1 - 6 . (canceled)

7 . An automatic transmission, comprising:
a case housing a speed change mechanism; a hydraulic control device disposed forward of the case in an on-vehicle state; a first axis disposed rearward of the hydraulic control device in the on-vehicle state, and provided with a primary pulley of a belt type continuously variable transmission device; a second axis disposed rearward of the first axis and provided with a secondary pulley of the belt type continuously variable transmission device and a parking gear; a control shaft that rotates based on an operation of a shift operation section; a manual valve used for setting a range of the hydraulic control device based on an axial position of the manual valve and disposed forward of the speed change mechanism in the on-vehicle state; a parking mechanism including a parking rod for switching a locking pawl between a meshable state in which the locking pawl is allowed to be meshed with the parking gear and a release state; a detent lever fixed to the control shaft, having a first end connected to the parking rod, and including a detent recess with which a detent mechanism is engaged; and a swing mechanism including a fulcrum serving as a swing center, a first extension extending from one end of the fulcrum, and a second extension extending to the other end of the fulcrum, wherein the control shaft and the parking rod are disposed between the first axis and the second axis in a front-rear direction, the first extension is connected to a second end of the detent lever, the second extension is connected to the manual valve, and the axial position of the manual valve changes in accordance with a rotation angle of the control shaft.

8 . The automatic transmission according to claim 7 , wherein
a pin is disposed on one of the detent lever and the first extension, a long hole to be engaged with the pin is disposed in the other one of the detent lever and the first extension, and the detent lever is slidably connected to the first extension.

9 . The automatic transmission according to claim 8 , wherein
a curvature of the long hole is set in such a manner that a range width of the detent recess of the detent lever corresponds to the axial position of the manual valve for which the range is set.

10 . The automatic transmission according to claim 7 , wherein
the first extension is connected to the second end of the detent lever through a connecting rod.

11 . The automatic transmission according to claim 10 , further comprising
a fulcrum shaft member including a shaft that is engaged with the swing mechanism and serves as the fulcrum, wherein the fulcrum shaft member is attachable to the case.

12 . The automatic transmission according to claim 11 , wherein
the case is provided with a range pressure setting unit for setting a range of the hydraulic control device by switching the range in accordance with the axial position of the manual valve, and the manual valve is supported in a hole provided in the range pressure setting unit.

13 . The automatic transmission according to claim 7 , further comprising
a fulcrum shaft member including a shaft that is engaged with the swing mechanism and serves as the fulcrum, wherein the fulcrum shaft member is attachable to the case.

14 . The automatic transmission according to claim 13 , wherein
the case is provided with a range pressure setting unit for setting a range of the hydraulic control device by switching the range in accordance with the axial position of the manual valve, and the manual valve is supported in a hole provided in the range pressure setting unit.

15 . The automatic transmission according to claim 8 , further comprising
a fulcrum shaft member including a shaft that is engaged with the swing mechanism and serves as the fulcrum, wherein the fulcrum shaft member is attachable to the case.

16 . The automatic transmission according to claim 15 , wherein
the case is provided with a range pressure setting unit for setting a range of the hydraulic control device by switching the range in accordance with the axial position of the manual valve, and the manual valve is supported in a hole provided in the range pressure setting unit.

17 . The automatic transmission according to claim 9 , further comprising
a fulcrum shaft member including a shaft that is engaged with the swing mechanism and serves as the fulcrum, wherein the fulcrum shaft member is attachable to the case.

18 . The automatic transmission according to claim 17 , wherein
the case is provided with a range pressure setting unit for setting a range of the hydraulic control device by switching the range in accordance with the axial position of the manual valve, and the manual valve is supported in a hole provided in the range pressure setting unit.

Assignees

• Aisin Aw Co
• Toyota Motor Co Ltd

Inventors

• Iwatsuru Yuji
• Kadokura Yuki
• Yamamoto Kozo
• Nakada Hirofumi
• Nakagawa Hideki

Classifications

• F16H63/3416 Primary

  Parking lock mechanisms or brakes in the transmission · CPC title

• F16H61/0021

  Generation or control of line pressure · CPC title

• F16H61/0265

  for gearshift control, e.g. control functions for performing shifting or generation of shift signals · CPC title

• F16H37/022

  the toothed gearing having orbital motion · CPC title

• F16H61/662

  with endless flexible members · CPC title