Synchronizer hub

Patent metadata

Field	Value
Publication number	US-9297425-B2
Application number	US-201214342597-A
Country	US
Kind code	B2
Filing date	Sep 7, 2012
Priority date	Sep 8, 2011
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

The invention relates to a synchronizer hub ( 1 ) comprising a hub body ( 4 ) that, on the outer circumference ( 5 ) thereof, has a sleeve toothing ( 6 ) for engagement of a sliding sleeve ( 6 a ), said sleeve toothing being interrupted by at least one first axial recess ( 7 ) and by at least one second axial recess ( 8 ), wherein the first axial recess ( 7 ) has first lateral faces ( 14, 15 ) and the second axial recess ( 8 ) has second lateral faces ( 17, 18 ), and wherein the first lateral faces ( 14, 15 ) are inclined to the axial direction at a first angle ( 20 ). The second lateral faces ( 17, 18 ) of the second axial recess ( 8 ) run at a second angle ( 21 ) to the axial direction, wherein the second angle ( 21 ) is not equal to the first angle ( 20 ) of the first lateral faces ( 14, 15 ).

First claim

The invention claimed is:

1. A transmission synchronization device comprising
at least one shaft,
a synchronizer hub, which is arranged on the at least one shaft, and which comprises at least one first axial recess and at least one second axial recess spaced apart therefrom,
a sliding sleeve, which is arranged radially above the synchronizer hub and is axially displaceable,
a shifting gear for each shifting direction respectively each with a toothing, arranged in an axial direction adjacent to the synchronizer hub,
a coupling body for each shifting gear respectively, each arranged on a shifting gear and pointing in the direction of the synchronizer hub,
first and second synchronizer rings, one of which is arranged in the axial direction between the synchronizer hub and a shifting gear respectively,
at least one first conical ring separate from the first and second synchronizer rings and arranged in a radial direction underneath the first synchronizer ring,
at least one second conical ring separate from the first and second synchronizer rings and for at least one shifting direction arranged between the first conical ring and the first synchronizer ring, said second conical ring having at least one cam and engaging in a recess of the coupling body via said at least one cam,
at least one first pressure part for the first shifting direction, which is mounted in the at least one first axial recess, and at least one second pressure part for the second shifting direction, which is mounted in the at least one second axial recess,
wherein the synchronizer hub comprises a hub body which on its outer circumference has a sleeve toothing for the engagement of the sliding sleeve, wherein the sleeve toothing is interrupted by the at least one first axial recess and the at least one second axial recess, the first axial recess comprising first lateral faces and the second axial recess comprises second lateral faces, and the first lateral faces being inclined relative to the axial direction at a first angle, wherein the second lateral faces of the second axial recess run at a second angle to the axial direction, and wherein the second angle is not equal to the first angle of the first lateral faces, and
wherein the at least one second axial recess in the axial direction has a smaller maximum cross section than the at least one first axial recess.

2. The transmission synchronization device as claimed in claim 1 , wherein the first lateral faces are arranged at the first angle only in one shifting direction.

3. The transmission synchronization device as claimed in claim 1 , wherein the second angle of the second lateral faces is approximately 0°.

4. The transmission synchronization device as claimed in claim 1 , wherein a plurality of first and a plurality of second axial recesses are provided, the first and second axial recesses being arranged alternately.

5. The transmission synchronization device as claimed in claim 1 , wherein axially inner end sections of the first lateral faces are at an angle.

6. The transmission synchronization device as claimed in claim 1 , wherein a base surface delimits the at least one first axial recess radially from below, and wherein only the at least one first axial recess comprises a radial bore in a base surface.

7. The transmission synchronization device as claimed in claim 1 , wherein in both shifting directions the first and second synchronizer rings are configured to be free of axial drive cams for mounting in the respective pressure part.

8. A transmission synchronization device comprising
at least one shaft,
a synchronizer hub, which is arranged on the at least one shaft, and which comprises at least one first axial recess and at least one second axial recess spaced apart therefrom,
a sliding sleeve, which is arranged radially above the synchronizer hub and is axially displaceable,
a shifting gear for each shifting direction respectively each with a toothing, arranged in an axial direction adjacent to the synchronizer hub,
a coupling body for each shifting gear respectively, each arranged on a shifting gear and pointing in the direction of the synchronizer hub,
first and second synchronizer rings, one of which is arranged in the axial direction between the synchronizer hub and a shifting gear respectively,
at least one first conical ring separate from the first and second synchronizer rings and arranged in a radial direction underneath the first synchronizer ring,
at least one second conical ring separate from the first and second synchronizer rings and for at least one shifting direction arranged between the first conical ring and the first synchronizer ring, said second conical ring having at least one cam and engaging in a recess of the coupling body via said at least one cam,
at least one first pressure part for the first shifting direction, which is mounted in the at least one first axial recess, and at least one second pressure part for the second shifting direction, which is mounted in the at least one second axial recess,
wherein the synchronizer hub comprises a hub body which on its outer circumference has a sleeve toothing for the engagement of the sliding sleeve, wherein the sleeve toothing is interrupted by the at least one first axial recess and the at least one second axial recess, the first axial recess comprising first lateral faces and the second axial recess comprises second lateral faces, and the first lateral faces being inclined relative to the axial direction at a first angle, wherein the second lateral faces of the second axial recess run at a second angle to the axial direction, and wherein the second angle is not equal to the first angle of the first lateral faces, and
wherein the at least one first pressure part comprises at least one servo face inclined relative to the axial direction and the at least one second pressure part is free of such servo faces.

9. The transmission synchronization device as claimed in claim 8 , wherein the at least one first pressure part with the servo faces is connected to the at least one first conical ring via an axial drive cam.

10. The transmission synchronization device as claimed in claim 8 , wherein the at least one second pressure part is connected to at least one first conical ring via an axial drive cam.

11. The transmission synchronization device as claimed in claim 8 , wherein the at least one first pressure part is arranged in shifting direction with the shifting gear, in which a higher torque is transmitted compared to the additional shifting gear.

12. The transmission synchronization device as claimed in claim 1 , wherein the first and second synchronizer rings comprise stop surfaces for delimiting the relative rotatability with respect to the synchronizer hub, and wherein the stop surfaces interact with the lateral walls of the axial recesses of the synchronizer hub.

13. A transmission synchronization device comprising
at least one shaft,
a synchronizer hub, which is arranged on the at least one shaft, and which comprises at least one first axial recess and at least one second axial recess spaced apart therefrom,
a sliding sleeve, which is arranged radially above the synchronizer hub and is axially displaceable,
a shifting gear for each shifting direction respectively each with a toothing, arranged in an axial direction adjacent to the synchronizer hub,
a coupling body for each shifting gear respectively, each arranged on a shifting gear and pointing in the direction of the synchronizer hub,
first and second synchronizer rings, one of which is arranged in the axial direction between the synchronizer hub and a shifting gear respectively,
at l

Assignees

• Mueller Alexander
• Pamminger Helmut
• Miba Sinter Austria Gmbh

Inventors

• Mueller Alexander
• Pamminger Helmut

Classifications

• F16D2023/0637

  Details relating to the hub member on which the sliding is arranged · CPC title

• F16D11/14 Primary

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

• F16D2023/0681

  Double cone synchromesh clutches · CPC title

• F16D2011/004

  using an internal or intermediate axially slidable sleeve, coupling both components together, whereby the intermediate sleeve is arranged internally at least with respect to one of the components · CPC title

• F16D23/06 Primary

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