Shifting mechanism for a transmission

Patent metadata

Field	Value
Publication number	US-11221069-B2
Application number	US-201816128960-A
Country	US
Kind code	B2
Filing date	Sep 12, 2018
Priority date	Sep 14, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

An engagement device (1) for a transmission (G), the engagement device (1) including a gear shift sleeve (S) arranged between a first idler gear (LR1) associated with a shaft (W) of the transmission (G) and a second idler gear (LR2) arranged coaxially to the shaft (W). By displacing the gear shift sleeve (S) towards the first idler gear (LR1), a rotationally fixed connection between the shaft (W) and the first idler gear (LR1) can be established. By displacing the gear shift sleeve (S) towards the second idler gear (LR2), a rotationally fixed connection between the first idler gear (LR1) and the second idler gear (LR2) can be established. The first idler gear (LR1) includes a plurality of axially projecting extensions (F) which extend through openings (A) formed in the gear shift sleeve (S).

First claim

The invention claimed is:

1. An engagement device ( 1 ) for a transmission (G), the engagement device ( 1 ) comprising:
a gear shift sleeve (S) arranged between a first idler gear (LR 1 ) associated with a shaft (W) of the transmission (G) and a second idler gear (LR 2 ) arranged coaxially to the shaft (W),
wherein, by displacing the gear shift sleeve (S) towards the first idler gear (LR 1 ), a rotationally fixed connection between the shaft (W) and the first idler gear (LR 1 ) is establishable,
wherein, by displacing the gear shift sleeve (S) towards the second idler gear (LR 2 ), a rotationally fixed connection between the first idler gear (LR 1 ) and the second idler gear (LR 2 ) is establishable, and
wherein the first idler gear (LR 1 ) comprises a plurality of axially projecting extensions (F) which extend through openings (A) formed in the gear shift sleeve (S).

2. The engagement device ( 1 ) of claim 1 , wherein each of the openings (A) is a through hole or an open area.

3. The engagement device ( 1 ) of claim 1 , wherein each of the plurality of axially projecting extensions (F) has a circular cross-section.

4. The engagement device ( 1 ) of claim 1 , wherein each of the plurality of axially projecting extensions (F) is a ring segment projecting from the first idler gear (LR 1 ).

5. The engagement device ( 1 ) of claim 1 , wherein the plurality of axially projecting extensions (F) and the first idler gear (LR 1 ) are one piece.

6. The engagement device ( 1 ) of claim 1 , wherein the plurality of axially projecting extensions (F) are connected to the first idler gear (LR 1 ) via a press-fit connection or a welded joint.

7. The engagement device ( 1 ) of claim 1 , wherein the engagement device ( 1 ) has a neutral position, in which a rotationally fixed connection exists neither between the shaft (W) and the first idler gear (LR 1 ) nor between the first and second idler gears (LR 1 , LR 2 ).

8. The engagement device ( 1 ) of claim 1 , further comprising a synchronizing mechanism (SY 1 , SY 2 ) associated with at least one of the first and second idler gears (LR 1 , LR 2 ).

9. The engagement device ( 1 ) of claim 1 , wherein at least one of the rotationally fixed connection between the shaft (W) and the first idler gear (LR 1 ) and the rotationally fixed connection between the first idler gear (LR 1 ) and the second idler gear (LR 2 ) is established via a dog toothing (K 1 , K 2 , KS).

10. The engagement device ( 1 ) of claim 1 , further comprising a pressure piece holder (DH) configured for supporting a spring-loaded pressure piece (D), by which the gear shift sleeve (S) is lockable in at least one axial position.

11. The engagement device ( 1 ) of claim 10 , wherein the pressure piece holder (DH) is centered on an inner side of the plurality of axially projecting extensions (F).

12. The engagement device ( 1 ) of claim 11 , wherein the pressure piece holder (DH) is rotationally fixed to the gear shift sleeve (S).

13. The engagement device ( 1 ) of claim 10 , wherein the pressure piece holder (DH) is radially centered on the first idler gear (LR 1 ) or the second idler gear (LR 2 ).

14. The engagement device ( 1 ) of claim 10 , wherein the pressure piece holder (DH) is centered on the shaft (W).

15. A transmission (G) for a motor vehicle, comprising the engagement device (S) of claim 1 .

16. The engagement device ( 1 ) of claim 1 , wherein the plurality of axially projecting extensions (F) are axially fixed relative to the first idler gear (LR 1 ).

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Retsch Matthias

Classifications

• F16H63/30 Primary

  Constructional features of the final output mechanisms · CPC title

• F16H3/006

  power being selectively transmitted by parallel flow paths, e.g. dual clutch transmissions · CPC title

• F16H2003/0931

  each countershaft having an output gear meshing with a single common gear on the output shaft · CPC title

• F16D23/04

  with an additional friction clutch (synchro rings per se F16D23/025) · CPC title

• F16D2023/0618

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