Oil pump arrangement in a transmission

Patent metadata

Field	Value
Publication number	US-9033107-B2
Application number	US-201113289155-A
Country	US
Kind code	B2
Filing date	Nov 4, 2011
Priority date	Nov 24, 2010
Publication date	May 19, 2015
Grant date	May 19, 2015

Abstract

An arrangement of an oil pump ( 8 ) and its drive in a transmission ( 1 ) that has a transmission housing ( 2 ) and at least one transmission shaft ( 3 ). The oil pump ( 8 ) is arranged coaxially with the at least one transmission shaft ( 3 ). The oil pump ( 8 ) is arranged on and can be driven by the at least one transmission shaft ( 3 ).

First claim

The invention claimed is:

1. An arrangement of an oil pump ( 8 ) and a drive element ( 10 ) of the oil pump ( 8 ) in a transmission ( 1 ) comprising:
a transmission housing ( 2 ),
at least one transmission shaft ( 3 ),
the oil pump ( 8 ) being arranged coaxially with the at least one transmission shaft ( 3 ),
the oil pump ( 8 ) being arranged on and drivable by the at least one transmission shaft ( 3 ),
a sleeve ( 5 a ) being fixedly connected to the at least one transmission shaft ( 3 ), and
the sleeve being disposed between and coupling the at least one transmission shaft ( 3 ) to the oil pump ( 8 ),
wherein the oil pump is a roller cell oil pump ( 8 ).

2. The arrangement according to claim 1 , wherein the drive element ( 10 ) is connected to and drivable by the at least one transmission shaft ( 3 ) by at least one carrier element ( 14 ) located between the sleeve ( 5 a ) and the drive element ( 10 ).

3. The arrangement according to claim 2 , wherein the at least one carrier element is a roller element ( 14 ).

4. The arrangement according to claim 3 , wherein the at least one roller element is a plurality of spaced apart balls ( 14 ).

5. The arrangement according to claim 4 , wherein the plurality of balls ( 14 ) are retained in a cage ring ( 16 ) supported radially on either the at least one transmission shaft ( 3 ) or a sleeve ( 5 a ).

6. The arrangement according to claim 2 , wherein the drive element ( 10 ) comprises a bore in which longitudinal grooves ( 15 ) are arranged to hold either the at least one carrier element or at least one ball ( 14 ).

7. The arrangement according to claim 2 , wherein longitudinal grooves are arranged on the sleeve ( 5 a ) which at least partially enclose either the at least one carrier element or at least one ball ( 14 ).

8. The arrangement according to claim 2 , wherein the drive element of the oil pump ( 8 ) is a pump wheel ( 10 ).

9. The arrangement according to claim 1 , wherein longitudinal grooves ( 13 ) are arranged on the sleeve ( 5 a ).

10. The arrangement according to claim 9 , wherein the sleeve ( 5 a ) is part of an output flange ( 5 ) which is fixedly connected to the at least one transmission shaft ( 3 ).

11. The arrangement according to claim 1 , wherein a drive element ( 10 ) of the oil pump ( 8 ) rotates within a receiving bore, the receiving bore is positioned eccentrically with respect to the at least one transmission shaft ( 3 ) and the receiving bore is fixed with respect to the transmission housing so at to prevent rotation thereof.

12. The arrangement according to claim 1 , wherein the oil pump ( 8 ) has a pump housing ( 9 ) which is one of supported in the transmission housing ( 2 ) and formed as part of the transmission housing ( 2 ).

13. The arrangement according to claim 1 , wherein the at least one transmission shaft is at least one of a transmission input shaft, a transmission output shaft and a countershaft ( 3 ).

14. The arrangement according to claim 1 , wherein the roller cell oil pump comprises a pump housing and a drive element, and an exterior surface of the drive element supports a plurality of roller elements ( 18 ) which are radially movable and facilitate displacement and pumping of oil during rotation of the drive element with respect to the pump housing.

15. The arrangement according to claim 1 , wherein the roller cell oil pump comprises a drive element which supports a plurality of roller elements ( 18 ), the plurality of roller elements ( 18 ) are received and radially movable within a plurality of outer grooves ( 17 ) formed within an outer surface of the drive element, and rotation of the drive element causes the plurality of roller elements ( 18 ) to move to and fro, within the outer grooves ( 17 ), and displace oil into a sickle-shaped gap ( 19 ) formed between the pump housing ( 9 ) and the pump wheel ( 10 ) and pump oil.

16. The arrangement according to claim 1 , wherein
the drive element ( 10 ) of the oil pump ( 8 ) has an inner surface and an outer surface, the inner surface of the drive element ( 10 ) has a plurality of inner grooves ( 15 ) and the outer surface of the drive element ( 10 ) comprises a plurality of outer grooves ( 17 );
the oil pump ( 8 ) is housed within a bore of an oil pump housing ( 9 ), and the bore is eccentric with respect to an outer surface of the drive element ( 10 ) of the oil Pump ( 8 );
the sleeve ( 5 a ) and the transmission shaft ( 3 ) rotate in unison around a rotational axis, and the sleeve ( 5 a ) comprises an outer surface which has a plurality of outer grooves ( 13 ); and
the drive element ( 10 ) is concentrically supported on the sleeve ( 5 a ) such that the plurality of inner grooves ( 15 ) of the drive element ( 10 ) communicate with the plurality of outer grooves ( 13 ) of the sleeve ( 5 a ) and such that the drive element ( 10 ) is axially slidable and rotationally fixed with respect to the sleeve ( 5 a ), and the drive element ( 10 ) so as to be rotationally driven by the sleeve ( 5 a ).

17. An arrangement of an oil pump ( 8 ) and a drive of the oil pump ( 8 ) in a transmission ( 1 ) comprising:
a transmission housing ( 2 ), and
at least one transmission shaft ( 3 ),
the oil pump ( 8 ) being arranged coaxially with the at least one transmission shaft ( 3 ) and drivable by the at least one transmission shaft ( 3 ),
the oil pump ( 8 ) having a pump housing ( 9 ) which is one of supported in the transmission housing ( 2 ) and formed as part of the transmission housing ( 2 ), and
the pump housing ( 9 ) being supported, relative to the transmission housing ( 2 ), by a cup spring ( 12 ).

18. The arrangement according to claim 17 , wherein the oil pump ( 8 ) is arranged next to a bearing ( 4 ) of the transmission shaft ( 3 ), and the cup spring ( 12 ) is clamped between an outer ring ( 4 b ) of the bearing ( 4 ) and the transmission housing ( 2 ).

19. The arrangement according to claim 17 , wherein a plurality of roller elements ( 18 ) are respectively received and radially movable within a plurality of outer grooves ( 17 ) formed in an oil pump wheel ( 10 ), and rotation of the oil pump wheel ( 10 ), within an eccentric bore of the pump housing ( 9 ), causes the plurality of roller elements ( 18 ) to move to and fro, within the plurality of outer grooves ( 17 ) of the oil pump wheel ( 10 ), and displace oil into a sickle-shaped gap ( 19 ) formed between the pump housing ( 9 ) and the pump wheel ( 10 ) and pump oil.

20. An arrangement of an oil pump ( 8 ) in a transmission ( 1 ), the arrangement comprising:
an oil pump wheel ( 10 ) having an inner surface and an outer surface, the inner surface of the oil pump wheel ( 10 ) comprising a plurality of inner grooves ( 15 ) and the outer surface of the oil pump wheel ( 10 ) comprising a plurality of outer grooves ( 17 ), the oil pump wheel ( 10 ) being housed within a bore of an oil pump housing ( 9 ), and the bore being eccentric with respect to the outer surface of the oil pump wheel ( 10 );
a sleeve ( 5 a ) being supported by a transmission shaft ( 3 ) such that the sleeve ( 5 a ) and the transmission shaft ( 3 ) rotate in unison around a rotational axis, and the sleeve ( 5 a ) comprising an outer surface which has a plurality of channels ( 13 );
the oil pump wheel ( 10 ) being concentrically supported on the sleeve ( 5 a ) by a plurality of balls ( 14 ), and the balls ( 14 ) communicating, on one side, with the plurality of inner grooves ( 15 ) of the oil pump wheel ( 10 ) and, on another side, with

Assignees

• Schneider Thomas
• Firzlaff Uwe
• Zahnradfabrik Friedrichshafen

Inventors

• Schneider Thomas
• Firzlaff Uwe

Classifications

• F16H57/0441 Primary

  Arrangements of pumps · CPC title

• F04C2/3445

  the vanes having the form of rollers, slippers or the like · CPC title

• F04C2210/206

  Oil · CPC title