Dog clutch for a vehicle transmission

Patent metadata

Field	Value
Publication number	US-10247252-B2
Application number	US-201715434496-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 16, 2017
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A dog clutch for a vehicle transmission 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, an actuator coaxially positioned within the driving member and movable along the axis to selectively engage the driving tooth with the driven tooth, and a biasing member radially inwardly biasing the driving tooth into contact with the actuator.

First claim

What is claimed is:

1. A 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 radially extending cavity;
a driven member coaxially surrounding the driving member and including a radially inward extending driven tooth;
an actuator coaxially positioned within the driving member and movable along the axis to selectively engage the driving tooth with the driven tooth; and
a biasing member radially inwardly biasing the driving tooth into contact with the actuator.

2. The dog clutch of claim 1 , wherein the biasing member comprises a helical coil spring surrounding the driving tooth.

3. The dog clutch of claim 2 , wherein the driving member further includes a groove within the radially extending cavity.

4. The dog clutch of claim 3 , further comprising a spring retainer positioned within the groove and abutting a radially distal end of the helical coil spring.

5. The dog clutch of claim 3 , wherein the driving tooth includes a landing abutting a radially proximal end of the helical coil spring.

6. The dog clutch of claim 1 , wherein the biasing member comprises a leaf spring.

7. The dog clutch of claim 6 , wherein the leaf spring is positioned on an outer circumferential surface of the driving member.

8. The dog clutch of claim 1 , wherein the driving tooth comprises a roller ball in contact with the actuator.

9. The dog 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 radially extending cavity;
a driven member coaxially surrounding the driving member and including a radially inward extending driven tooth;
an actuator coaxially positioned within the driving member and movable along the axis to selectively engage the driving tooth with the driven tooth; and
a biasing member radially inwardly biasing the driving tooth into contact with the actuator.

11. The transmission of claim 10 , wherein the biasing member comprises a helical coil spring surrounding the driving tooth.

12. The transmission of claim 11 , wherein the driving member further includes a groove within the radially extending cavity.

13. The transmission of claim 12 , further comprising a spring retainer positioned within the groove and abutting a radially distal end of the helical coil spring.

14. The transmission of claim 12 , wherein the driving tooth includes a landing abutting a radially proximal end of the helical coil spring.

15. The transmission of claim 10 , wherein the biasing member comprises a leaf spring.

16. The transmission of claim 15 , wherein the leaf spring is positioned on an outer circumferential surface of the driving member.

17. The transmission of claim 10 , wherein the driving tooth comprises a roller ball in contact with the actuator.

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

• F16D2011/008

  characterised by the form of the teeth forming the inter-engaging parts; Details of shape or structure of these teeth · CPC title

• F16D11/16 Primary

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

• F16D2011/002

  using an external and axially slidable sleeve for coupling the teeth of both coupling components together · CPC title

• F16D2300/24

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

• F16D11/08 Primary

  actuated by moving a non-rotating part axially · CPC title