Hydraulic dog clutch

Patent metadata

Field	Value
Publication number	US-2016160938-A1
Application number	US-201414563444-A
Country	US
Kind code	A1
Filing date	Dec 8, 2014
Priority date	Dec 8, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

A torque transmitting mechanism for a transmission includes a first and a second rotating member, a rotating piston, a stationary piston, and a first bearing. The rotating piston is rotatably connected to the first rotating member and includes a splined end. The stationary piston is disposed in a stationary housing of the transmission. The stationary piston and the stationary housing form a hydraulic fluid piston apply chamber. The first bearing is disposed between the rotating piston and the stationary piston. The splined end of the second rotating member is axially aligned and configured to engage with the splined end of the rotating piston.

First claim

The following is claimed:

1 . A torque transmitting mechanism for a transmission, the torque transmitting mechanism comprising:
a first and a second rotating member, and wherein the second rotating member includes a splined end; a rotating piston rotatably connected to the first rotating member, and wherein the rotating piston includes a splined end; a stationary piston disposed in a stationary housing of the transmission, and wherein the stationary piston and the stationary housing form a hydraulic fluid piston apply chamber; a first bearing disposed between the rotating piston and the stationary piston; and wherein the splined end of the second rotating member is axially aligned and configured to engage with the splined end of the rotating piston.

2 . The torque transmitting mechanism of claim 1 wherein the rotating piston is rotatably connected to the first rotating member through an axially sliding spline connection.

3 . The torque transmitting mechanism of claim 1 wherein the rotating piston is rotatably connected to the first rotating member through a ball spline connection.

4 . The torque transmitting mechanism of claim 1 wherein the first rotating member further includes a plurality of splines and an annular ring disposed in a groove at an end of the plurality of splines, and the torque transmitting mechanism further includes a biasing member disposed between the annular ring and the rotating piston to bias the rotating piston towards the stationary piston.

5 . The torque transmitting mechanism of claim 4 further including a third rotating member, and wherein the first rotating member is an output shaft, the second rotating member is a transfer shaft coaxial with and partially covering the output shaft, and the third rotating member is coaxial with the output shaft and transfer shaft, is partially disposed in the output shaft, and is connected for common rotation with the output shaft through a ball spline connection.

6 . The torque transmitting mechanism of claim 5 further including a transfer gear fixed for common rotation with the transfer shaft.

7 . The torque transmitting mechanism of claim 6 wherein the output shaft further includes a splined portion meshing with an output gear.

8 . The torque transmitting mechanism of claim 1 wherein the first bearing is a roller thrust bearing.

9 . The torque transmitting mechanism of claim 8 further including a second bearing disposed between the first and second rotating member, and wherein the second bearing is a roller thrust bearing.

10 . A torque transmitting mechanism for a transmission, the torque transmitting mechanism comprising:
a first and a second rotating member, and wherein the first rotating member includes a plurality of splines on an outer surface, a groove at an end of the plurality of splines and an annular ring disposed in the groove, and the second rotating member includes a splined end; a rotating piston rotatably connected to the first rotating member, and wherein the rotating piston includes a splined end; a stationary piston disposed in a stationary housing of the transmission, and wherein the stationary piston and the stationary housing form a hydraulic fluid piston apply chamber; a biasing member disposed between the annular ring of the first rotating member and the rotating piston applying a biasing force on the rotating piston towards the stationary piston, and a first bearing disposed between the rotating piston and the stationary piston; and wherein the splined end of the second rotating member is axially aligned and configured to engage with the splined end of the rotating piston.

11 . The torque transmitting mechanism of claim 10 wherein the rotating piston is rotatably connected to the first rotating member through an axially sliding spline connection.

12 . The torque transmitting mechanism of claim 10 wherein the rotating piston is rotatably connected to the first rotating member through a ball spline connection.

13 . The torque transmitting mechanism of claim 12 further including a third rotating member, and wherein the first rotating member is an output shaft, the second rotating member is a transfer shaft coaxial with and partially covering the output shaft, and the third rotating member is coaxial with the output shaft and transfer shaft, is partially disposed in the output shaft, and is connected for common rotation with the output shaft through a ball spline connection.

14 . The torque transmitting mechanism of claim 13 further including a transfer gear fixed for common rotation with the transfer shaft.

15 . The torque transmitting mechanism of claim 14 wherein the output shaft further includes a splined portion meshing with an output gear.

16 . The torque transmitting mechanism of claim 10 wherein the first bearing is a roller thrust bearing.

17 . The torque transmitting mechanism of claim 16 further including a second bearing disposed between the first and second rotating member, and wherein the second bearing is a roller thrust bearing.

18 . A torque transmitting mechanism for a transmission, the torque transmitting mechanism comprising:
a first, a second, and a third rotating member, and wherein the first rotating member includes a plurality of splines on an outer surface, a groove at an end of the plurality of splines and an annular ring disposed in the groove, the second rotating member includes a splined end; a rotating piston rotatably connected to the first rotating member through a ball spline connection, and wherein the rotating piston includes a splined end; a stationary piston disposed in a stationary housing of the transmission, and wherein the stationary piston and the stationary housing form a hydraulic fluid piston apply chamber; a biasing member disposed between the annular ring of the first rotating member and the rotating piston applying a biasing force on the rotating piston towards the stationary piston, and a first roller thrust bearing disposed between the rotating piston and the stationary piston; and wherein the splined end of the second rotating member is axially aligned and configured to engage with the splined end of the rotating piston.

19 . The torque transmitting mechanism of claim 18 wherein the first rotating member is an output shaft, the second rotating member is a transfer shaft coaxial with and partially covering the output shaft, and the third rotating member is coaxial with the output shaft and transfer shaft, is partially disposed in the output shaft, and is connected for common rotation with the output shaft through a ball spline connection.

20 . The torque transmitting mechanism of claim 19 further including a second roller thrust bearing disposed between the first and second rotating member.

Assignees

• Gm Global Tech Operations Inc

Inventors

• Wooden Elizabeth I

Classifications

• F16D25/061 Primary

  the clutch having interengaging clutch members · CPC title

• F16D25/12

  Details not specific to one of the before-mentioned types · CPC title

• F16D11/10

  with clutching members movable only axially · CPC title

• F16D11/14

  with clutching members movable only axially (F16D11/02, F16D11/08 take precedence) · CPC title

• F16H47/00

  Combinations of mechanical gearing with fluid clutches or fluid gearing · CPC title