Synchronizer for radially applied dog clutch for a vehicle

Patent metadata

Field	Value
Publication number	US-10190643-B2
Application number	US-201715434553-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 16, 2017
Publication date	Jan 29, 2019
Grant date	Jan 29, 2019

Abstract

A radially applied dog clutch for a vehicle transmission. The clutch includes a driving member configured to rotate about an axis and including a cavity extending radially from the axis, a driving tooth slidably movable within the radially extending cavity, a driven member coaxially surrounding the driving member and including a radially inward extending driven tooth, and a synchronizer coaxially positioned between the driving member and the driven member.

First claim

What is claimed is:

1. A radially applied dog clutch for a vehicle transmission, the clutch comprising:
a driving member configured to rotate about an axis and including a cavity extending radially from the axis;
a driving tooth slidably movable within the cavity extending radially from the axis;
a driven member coaxially surrounding the driving member and including a radially inward extending driven tooth;
a synchronizer coaxially positioned between the driving member and the driven member; and
an actuator coaxially positioned within the driving member and movable along the axis to selectively engage the driving tooth sequentially with the synchronizer and the driven tooth.

2. The clutch of claim 1 , wherein the synchronizer comprises a substantially cylindrical wall with a window.

3. The clutch of claim 2 , wherein the window is adapted to receive the driving tooth.

4. The clutch of claim 2 , wherein the cavity extending radially from the axis comprises a plurality of cavities extending radially from the axis, the radially inward extending driven tooth comprises a plurality of radially inward extending driven teeth, and the synchronizer further comprises a plurality of windows in the cylindrical wall, and wherein the clutch further comprises a plurality of driving teeth each slidably movable within a corresponding one of the plurality of cavities extending radially from the axis.

5. The clutch of claim 1 , wherein the synchronizer comprises a radially extending flange and the driven member includes a radially extending flange having a surface opposing a surface of the synchronizer flange.

6. The clutch of claim 5 , further comprising a friction material on one of the synchronizer flange and the driven member flange.

7. The clutch of claim 5 , further comprising a biasing member that biases the synchronizer flange into contact with the driven member flange.

8. The clutch of claim 5 , further comprising a retainer on the driven member and wherein the biasing member is captured between the retainer and the synchronizer flange.

9. The clutch of claim 1 , wherein the actuator comprises:
an actuator shaft movable along the axis and including a swaged end;
a spring retainer on the actuator shaft;
a bullet actuator slidably and coaxially mounted on the actuator shaft adjacent the swaged end; and
a biasing spring coaxially mounted on the actuator shaft and positioned between the bullet actuator and the spring retainer.

10. A vehicle transmission comprising:
a driving member configured to rotate about an axis and including a cavity extending radially from the axis;
a driving tooth slidably movable within the cavity extending radially from the axis;
a driven member coaxially surrounding the driving member and including a radially inward extending driven tooth;
a synchronizer coaxially positioned between the driving member and the driven member; and
an actuator coaxially positioned within the driving member and movable along the axis to selectively engage the driving tooth sequentially with the synchronizer and the driven tooth.

11. The transmission of claim 10 , wherein the synchronizer comprises a substantially cylindrical wall with a window.

12. The transmission of claim 11 , wherein the window is adapted to receive the driving tooth.

13. The transmission of claim 11 , wherein the cavity extending radially from the axis comprises a plurality of cavities extending radially from the axis, the radially inward extending driven tooth comprises a plurality of radially inward extending driven teeth, and the synchronizer further comprises a plurality of windows in the cylindrical wall, and wherein the clutch further comprises a plurality of driving teeth each slidably movable within a corresponding one of the plurality of cavities extending radially from the axis.

14. The transmission of claim 10 , wherein the synchronizer comprises a radially extending flange and the driven member includes a radially extending flange having a surface opposing a surface of the synchronizer flange.

15. The transmission of claim 14 , further comprising a friction material on one of the synchronizer flange and the driven member flange.

16. The transmission of claim 14 , further comprising a biasing member biasing the synchronizer flange into contact with the driven member flange.

17. The transmission of claim 14 , further comprising a retainer on the driven member and wherein the biasing member is captured between the retainer and the synchronizer flange.

18. The transmission of claim 10 , wherein the actuator comprises:
an actuator shaft movable along the axis and including a swaged end;
a spring retainer on the actuator shaft;
a bullet actuator slidably and coaxially mounted on the actuator shaft adjacent the swaged end; and
a biasing spring coaxially mounted on the actuator shaft and positioned between the bullet actuator and the spring retainer.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Littlefield Joseph R
• Boyd Jonathan

Classifications

• F16D2023/0618

  Details of blocking mechanism comprising a helical spring loaded element, e.g. ball · CPC title

• F16D2300/24

  Concentric actuation rods, e.g. actuation rods extending concentrically through a shaft · CPC title

• F16D23/02

  Arrangements for synchronisation, also for power-operated clutches (shape or mounting of interengaging parts of clutch members to facilitate engagement F16D11/08) · CPC title

• F16D11/16

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

• F16D23/06 Primary

  and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation · CPC title