Liquid friction clutch

Patent metadata

Field	Value
Publication number	US-9534643-B2
Application number	US-201414530780-A
Country	US
Kind code	B2
Filing date	Nov 2, 2014
Priority date	Aug 12, 2009
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

A liquid friction clutch ( 1 ) having a housing ( 2, 3 ), a clutch disc ( 4 )—rotatable relative to the housing ( 2, 3 ) and which is rotatably arranged on an end ( 5 ) of a shaft ( 6 ) which is mounted centrally within the housing ( 2, 3 ), which shaft ( 6 ) bears on its other end ( 8 ) a driveable active element ( 7 ). A working chamber ( 9 ) is positioned between the housing ( 2, 3 ) and the clutch disk ( 4 ). A storage chamber ( 10 ) is provided for the clutch fluid. A supply duct ( 11 ) leads from the storage chamber ( 10 ) to the working chamber ( 9 ). A stationary clutch part ( 13 ) relative to which the housing ( 2, 3 ) is rotatable, wherein a rotatably mounted pump element ( 14 ) is provided which, with the housing ( 2, 3 ), defines a shear gap ( 12 ).

First claim

The invention claimed is:

1. A liquid clutch comprising:
a stationary member;
a housing member that is rotatable about an axis relative to said stationary member;
a clutch disk positioned in said housing member, said clutch disk being rotatable about said axis relative to the housing member;
a shaft having a first end and a second end, the first end being coupled to the clutch disk for rotation therewith;
a driveable active element that is coupled to the second end of the shaft for rotation therewith;
a working chamber positioned in said housing member;
a storage chamber for clutch fluid in said housing member;
a supply duct coupling said storage chamber and said working chamber in fluid communication;
a PUMP element that is rotatable relative to said stationary member and said housing, said PUMP element cooperating with said housing to define a shear gap; and
a brake device for braking said pump element.

2. The liquid friction clutch as described in claim 1 , wherein said brake device is designated as a magnetic brake device.

3. The liquid friction clutch as described in claim 1 wherein said brake device comprises a friction brake device.

4. The liquid friction clutch as described in claim 1 wherein said brake device comprises a solenoid, a permanent magnetic and an eddy-current ring.

5. A liquid clutch comprising:
a stationary member;
a housing member that is rotatable about an axis relative to said stationary member;
a clutch disk positioned in said housing member, said clutch disk being rotatable about said axis relative to the housing member;
a shaft having a first end and a second end, the first end being coupled to the clutch disk for rotation therewith;
a driveable active element that is coupled to the second end of the shaft for rotation therewith;
a working chamber positioned in said housing member;
a storage chamber for clutch fluid in said housing member;
a supply duct coupling said storage chamber and said working chamber in fluid communication; and
a PUMP element that is rotatable relative to said stationary member and said housing, said PUMP element cooperating with said housing to define a shear gap;
wherein the shear gap is delimited with respect to the housing by two sealing gaps.

6. A liquid friction clutch comprising:
a stationary member;
a housing member that is rotatable about an axis relative to said stationary member;
a shaft member rotatably mounted in said housing member;
a clutch disk mounted on said shaft member adjacent one end of said shaft member and a driveable active member positioned adjacent the other end of said shaft member;
a working chamber between said housing member and said clutch disk;
a storage chamber in said housing member;
a supply duct fluidly coupling said storage chamber to said working chamber;
a pump member positioned in said housing member and rotatable about said axis relative to said stationary member and said housing member, said pump member separated from said housing member by a first sealing gap, said pump member having an outer edge with a shear gap recess formed therein; and
a braking member for braking said pump element.

7. The liquid friction clutch as described in claim 6 wherein the separation of said pump member and said housing member comprises a second sealing gap.

8. The liquid friction clutch as described in claim 6 wherein said braking member comprises a magnetic brake device.

9. The liquid friction clutch as described in claim 6 wherein said braking member comprises a friction brake device.

10. The liquid friction clutch as described in claim 6 wherein said pump member is rotatably mounted on said stationary part.

11. The liquid friction clutch as described in claim 6 wherein said pump member is rotatably mounted on said shaft member.

12. The liquid friction clutch as described in claim 6 wherein said braking member comprises a solenoid, a permanent magnet and an eddy-current brake ring.

13. A liquid friction clutch comprising:
a stationary member;
a housing member rotatably positioned relative to said stationary member;
a shaft member rotatably mounted in said housing member;
a clutch disk mounted on said shaft member adjacent one end of said shaft member and a driveable active member positioned adjacent the other end of said shaft member;
a working chamber between said housing member and said clutch disk;
a storage chamber in said housing member;
a supply duct fluidly coupling said storage chamber to said working chamber;
a pump member positioned in said housing member and rotatable about said axis relative to said stationary member and said housing member, said pump member separated from said housing member by a shear gap; and
means for slowing rotation of said pump member relative to said stationary member.

14. The liquid friction clutch as described in claim 13 wherein said rotation slowing means comprises a magnetic brake device.

15. The liquid friction clutch as described in claim 13 wherein said rotation slowing means comprises a friction brake device.

16. The liquid friction clutch as described in claim 13 wherein said rotation slowing means comprises a solenoid, a permanent magnet and an eddy-current brake ring.

Assignees

• Borgwarner Inc

Inventors

• Buchholz Thomas
• Sorg Wolfgang

Classifications

• F16D35/02

  with rotary working chambers and rotary reservoirs, e.g. in one coupling part · CPC title

• F16D35/028 Primary

  actuated electrically, e.g. by an electromagnet (valves actuated electrically F16D35/024) · CPC title