Adjustable shift fork system for efficient assembly and disassembly of a clutch assembly

Patent metadata

Field	Value
Publication number	US-12297906-B2
Application number	US-202318319253-A
Country	US
Kind code	B2
Filing date	May 17, 2023
Priority date	May 17, 2023
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

Shift fork system and method. The shift fork system includes multiple fork guides that are removably coupled to a shift fork body. Each fork guide is configured to removably mate with a clutch assembly, including a hub, to enable the clutch assembly to be adjusted. Further, multiple attachment devices in the shift fork system are each be configured to releasably fix a position of one of the fork guides in relation to the clutch assembly.

First claim

The invention claimed is:

1. A shift fork system, comprising:
a plurality of fork guides adjustably coupled to a shift fork body;
a plurality of attachment devices which are each configured to releasably fix a position of one of the plurality of fork guides in relation to a clutch assembly;
wherein each fork guide, in a first position, is configured to mate with and adjust the clutch assembly;
wherein the clutch assembly includes a hub; and
wherein the plurality of attachment devices mate with grooves in stems of the plurality of fork guides in a configuration that fixes the position of the plurality of fork guides in relation to the clutch assembly wherein the plurality of attachment devices are shoulder bolts, wherein the grooves extend around at least portions of circumferences of the stems of the plurality of fork guides; and wherein shanks of the plurality of attachment devices are positioned at least partially within the grooves in the stems of the plurality of fork guides when they are in the configuration that fixes the position of the plurality of fork guides in relation to the clutch assembly.

2. The shift fork system of claim 1 , wherein heads of the plurality of fork guides mate with an outer recess in the clutch assembly.

3. The shift fork system of claim 1 , wherein the shift fork body forms a monolithic structure.

4. The shift fork system of claim 1 , wherein the plurality of fork guides are designed to radially extend and retract in relation to the shift fork body.

5. The shift fork system of claim 1 , wherein:
when the plurality of fork guides are mated with a recess in the clutch assembly, the plurality of fork guides are in the first position which is an extended position; and
when the plurality of fork guides are decoupled from the recess of the clutch assembly, the plurality of fork guides are in a retracted position.

6. The shift fork system of claim 1 , wherein the shift fork body includes multiple fork guide interfaces which each include a notch profiled to mate with a head of the corresponding fork guide.

7. The shift fork system of claim 1 , wherein, when the clutch assembly is transitioned between engagement and disengagement, an axial position of a sliding sleeve changes with regard to the hub, wherein the sliding sleeve is included in the clutch assembly.

8. The shift fork system of claim 1 , wherein the clutch assembly is a synchronizer assembly.

9. The shift fork system of claim 8 , wherein the clutch assembly includes a plurality of detents in the hub and wherein one or more detent components are positioned in each of the plurality of detents.

10. The shift fork system of claim 9 , wherein the one or more detent components includes a spring and a ball bearing.

11. A shift fork system, comprising:
a plurality of fork guides removably coupled to a shift fork body, each fork guide having a stem and a groove extending around at least a portion of a circumference of the stem;
wherein each fork guide is configured to:
in an extended position mate with a clutch assembly and enable the clutch assembly to be adjusted by the plurality of fork guides; and
in a retracted position decouple from the clutch assembly; and

a plurality of attachment devices, each attachment device having a shank,
wherein the shanks of the attachment devices are positioned at least partially into the grooves of the fork guides to retain the plurality of fork guides in their extended positions.

12. The shift fork system of claim 11 ,
wherein the plurality of attachment devices are shoulder bolts; and
wherein the shift fork body includes a plurality of shift fork arms, each arm including a hole profiled to receive an attachment device, and each hole extending along an axis perpendicular to a longitudinal axis of a stem of a fork guide.

13. The shift fork system of claim 11 , wherein the shift fork body is formed as a single piece.

14. The shift fork system of claim 11 , wherein the clutch assembly includes a plurality of neutral detents in a hub and wherein a spring loaded ball bearing is positioned in each of the plurality of neutral detents.

15. The shift fork system of claim 14 , wherein:
the plurality of fork guides mate with an outer recess in a sliding sleeve in the clutch assembly; and
an inner surface of the sliding sleeve includes a plurality of splines that mate with splines in the hub.

16. The shift fork system of claim 11 , wherein the shift fork body includes multiple fork guide interfaces which each include a notch profiled to mate with a head of the corresponding fork guide.

17. A method for assembling a shift fork system, comprising:
assembling a clutch assembly that includes a hub and a sliding sleeve;
mating the clutch assembly with a shaft;
urging a plurality of fork guides into an extended position to mate with the clutch assembly, each fork guide having a stem and a groove extending around at least a portion of a circumference of the stem; and
fixing the plurality of fork guides in the extended position by installing a plurality of attachment devices into a shift fork body and the plurality of fork guides, each attachment device having a shank, and the shanks of the attachment devices being positioned at least partially into the grooves of the stems of the fork guides to fix the plurality of fork guides in the extended position.

18. The method of claim 17 , wherein the plurality of attachment devices are shoulder bolts.

19. The method of claim 18 , wherein installing the plurality of attachment devices includes mating the shoulder bolts with the grooves in the stems of the plurality of fork guides.

Assignees

• Dana Heavy Vehicle Sys Group

Inventors

• Hall Justin
• Leber Mark W
• Cook Michael D
• Smith Shane T
• Vailliencourt Robert L

Classifications

• F16D23/02 Primary

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

• F16D2023/141

  characterised by using a fork; Details of forks · CPC title

• F16H2063/324

  characterised by slide shoes, or similar means to transfer shift force to sleeve · CPC title

• F16D23/14

  Clutch-actuating sleeves {or bearings}; Actuating members directly connected to clutch-actuating sleeves {or bearings} · CPC title

• F16H63/32 Primary

  Gear shift yokes, {e.g. shift forks} · CPC title