Start-up clutch and torsional-vibration damper assembly

• US 7,264,101 B2
• Filed: 03/09/2005
• Issued: 09/04/2007
• Est. Priority Date: 04/10/2004
• Status: Active Grant

• Current Assignee: BorgWarner Incorporated
• Original Assignee: BorgWarner Incorporated
• Inventors: Heinrich, Johannes, Hauck, Hans Juergen, Schaefer, Michael, Strauss, Dietmar
• Primary Examiner(s): Lorence; Richard M.
• Application Number:
  US11/076,256
• Publication Number:
  US 20050224308A1
• Time in Patent Office: 909 Days
• Field of Search: 192/55.61
• US Class Current: 192/55.61
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae
• CPC Class Codes: F16D 25/12 Details not specific to one of the before-mentioned types
• CPC Class Codes: F16F 15/123 Wound springs F16F15/1213, F16F15/1216, F16F15/127 take precedence

Abstract

A start-up clutch and torsional-vibration damper assembly including a disk clutch having an outer disk carrier and an inner disk carrier, and a torsional vibration damper having a primary element, a secondary element, and a spring dampening mechanism. The spring dampening mechanism is disposed between and operatively couples the primary element and the secondary element. The torsional vibration damper connected in series to the disk clutch such that the torsional vibration damper and the disk clutch are juxtaposed to each other along a common axis with the primary element having substantially the same outside radius as the outer disk carrier.

Claims

1. A start-up clutch and torsional-vibration damper assembly comprising:

a disk clutch having an outer disk carrier and an inner disk carrier;

a torsional vibration damper having a primary element, a secondary element, and a spring dampening mechanism disposed between and operatively coupling said primary element and said secondary element;

said torsional vibration damper connected in series to said disk clutch such that said torsional vibration damper and said disk clutch are juxtaposed to each other along a common axis, said primary element having substantially the same outside radius as said outer disk carrier, and said spring damping mechanism including at least one coil spring disposed circumferentially about said common axis and the ratio between the diameter of said at least one spring and said outside radius is in a range between 0.5 and 0.75.

2. A start-up clutch and torsional-vibration damper assembly as set forth in claim 1 wherein said spring damping mechanism further includes a plurality of coil springs disposed circumferentially about said common axis and at least one spring separator adapted to accept and retain said plurality of springs such that said at least one spring separator series-connects said plurality of springs.

3. A start-up clutch and torsional-vibration damper assembly as set forth in claim 1 wherein said disk clutch includes a first set of disks operatively mounted to one of said disk carriers and a second set of disks operatively mounted to the other of said disk carriers, said first set and said second set of disks interposed between each other and adapted to be operatively pressed together in a friction-relevant contact, each disk of one of said sets of disks further having a friction material disposed thereupon, said friction material having a plurality of grooves adapted to provide a flow path for cooling media.

4. A start-up clutch and torsional-vibration damper assembly as set forth in claim 1 wherein said disk clutch and said torsional vibration damper are operatively disposed within a closed housing made of two half shells.

5. A start-up clutch and torsional-vibration damper assembly as set forth in claim 1 which further includes a gearbox inlet collar disposed about said common axis that is adapted to provide an operative connection between said secondary element and a gearbox inlet shaft.

6. A start-up clutch and torsional-vibration damper assembly as set forth in claim 5 which further includes a spring element and retainer ring that are adapted to retain said secondary element in a rotationally operative manner about said gearbox inlet collar with respect to said primary element, said spring element further adapted to provide a predetermined friction moment to said secondary element to provide torsional dampening in addition to that provided by said spring dampening mechanism.

7. A start-up clutch and torsional-vibration damper assembly as set forth in claim 5 wherein said torsional vibration damper and said disk clutch are operatively disposed about said gearbox inlet collar.

8. A start-up clutch and torsional-vibration damper assembly as set forth in claim 5 which further includes a clutch collar disposed about said common axis such that said disk clutch is operatively mounted to said clutch collar and said torsional vibration damper is operatively mounted to said gearbox inlet collar.

9. A start-up clutch and torsional-vibration damper assembly as set forth in claim 5 which further includes a clutch collar disposed about said common axis such that said torsional vibration damper is operatively mounted to said clutch collar and said disk clutch is operatively mounted to said gearbox inlet collar.

10. A start-up clutch and torsional-vibration damper as set forth in claim 1 which further includes a flexible disk that is adapted to provide an operative connection between said assembly and a prime mover.

11. A start-up clutch and torsional-vibration damper assembly as set forth in claim 1 which further includes a crankshaft starter generator operatively mounted to said assembly, said assembly being operatively connected to a prime mover such that said crankshaft starter generator can be electrically energized to provide an input of mechanical motive force to start said prime mover and provide an output of generated electro-motive force when operatively rotating with said assembly.

12. A start-up clutch and torsional-vibration damper assembly comprising:

a disk clutch having an outer disk carrier and an inner disk carrier;

a torsional vibration damper having a primary element, a secondary element, and a spring dampening mechanism disposed between and operatively coupling said primary element and said secondary element;

said torsional vibration damper connected in series to said disk clutch such that said torsional vibration damper and said disk clutch are juxtaposed to each other along a common axis, said primary element having substantially the same outside radius as said outer disk carrier, and said secondary element is a damper flange disk and said primary element is a damper shell having two damper half shells that encompasses said damper flange disk.

13. A start-up clutch and torsional-vibration damper assembly comprising:

a disk clutch having an outer disk carrier and an inner disk carrier;

a torsional vibration damper having a primary element, a secondary element, and a spring dampening mechanism disposed between and operatively coupling said primary element and said secondary element;

said torsional vibration damper connected in series to said disk clutch such that said torsional vibration damper and said disk clutch are juxtaposed to each other along a common axis, said primary element having substantially the same outside radius as said outer disk carrier, and said disk clutch and said torsional vibration damper being operatively disposed within a closed housing adapted to operatively contain a flow of cooling media and said outer disk carrier mounted to said housing in a torque-proof manner.