Inner disc-carrier for wet-type friction-clutch

Patent metadata

Field	Value
Publication number	US-11098768-B2
Application number	US-201916591784-A
Country	US
Kind code	B2
Filing date	Oct 3, 2019
Priority date	Oct 11, 2018
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

An inner disc carrier (LT) for a wet-type friction clutch (K0) may have a driving toothing including ridges (S, SX) and grooves (N) for the form-locking accommodation of discs (L) of the friction clutch (K0). Each of a first group of the ridges (S) has a first opening (A1) produced in a chip-less shaping process and a section (ST) extending radially inwardly at the first opening (A1) and created during production of the first opening (A1). Hydraulic fluid supplied radially from inside the inner disc carrier (LT) from a first axial position is guided through the first openings (A1) to the discs (L). Hydraulic fluid supplied radially from inside the inner disk carrier (LT) from a second axial position is guided past the discs (L). The sections (ST) of the ridges (S) act as a damming contour for hydraulic fluid supplied radially from the second axial position.

First claim

The invention claimed is:

1. An inner disc carrier (LT) for a wet-type friction clutch (K 0 ), comprising:
a driving toothing including ridges (S, SX) and grooves (N) for form-locking accommodation of discs (L) of the friction clutch (K 0 ), each of at least a first group of the ridges (S) comprises a first opening (A 1 ) produced in a chip-less shaping process and a section (ST) extending radially inwardly at the first opening (A 1 ) and created during production of the first opening (A 1 ),
wherein hydraulic fluid supplied radially from inside the inner disc carrier (LT) from a first axial position is guided through the first openings (A 1 ) to the discs (L),
wherein hydraulic fluid supplied radially from inside the inner disk carrier (LT) from a second axial position is guided past the discs (L), the second axial position being spaced apart from the first axial position,
wherein the sections (ST) of the first group of the ridges (S) form a damming contour for the hydraulic fluid supplied radially from the second axial position,
wherein each of a second group of the ridges (S) comprises a second opening (A 2 ) through which the hydraulic fluid supplied from the first axial position is guided to the discs (L), wherein the second openings (A 2 ) are arranged at a different axial position of the inner disc carrier (LT) than the first openings (A 1 ), the second group of the ridges (S) being separate from the first group of the ridges (S), and
wherein each of the second group of the ridges (S) comprising the second openings (A 2 ) includes a radially inward-directed indentation (V) forming a damming contour preventing the hydraulic fluid supplied from the second axial position from being guided through the second openings (A 2 ), the indentations (V) being axially spaced from the second openings (A 2 ).

2. The inner disc carrier (LT) of claim 1 , wherein at least one of the second openings (A 2 ) or the indentations (V) is produced by chip-less shaping.

3. The inner disc carrier (LT) of claim 1 , wherein a radially inward-directed damming contour (SK) is provided on an axial end of at least one of the first group of the ridges (S) that comprise the first openings (A 1 ) or the second group of the ridges (S) that comprise the second openings (A 2 ).

4. The inner disc carrier (LT) of claim 3 , wherein the damming contour (SK) is formed by an axial caulking of the inner disc carrier (LT).

5. The inner disc carrier (LT) of claim 1 , wherein each of two or more of the ridges (S) comprises a third opening (A 3 ) through which at least a portion of the hydraulic fluid supplied from the second axial position is guided past the discs (L).

6. The inner disc carrier (LT) of claim 5 , wherein each of the ridges (S) comprises the third opening (A 3 ).

7. The inner disc carrier (LT) of claim 5 , wherein the third openings (A 3 ) are produced by chip-less shaping.

8. The inner disc carrier of claim 5 , further comprising a cylindrical section (LTZ) and a flange section (LTF) adjacent to the cylindrical section (LTZ),
wherein the driving toothing is formed on the cylindrical section (LTZ), and
wherein the third openings (A 3 ) are positioned at a transition area between the cylindrical section (LTZ) and the flange section (LTF).

9. The inner disc carrier (LT) of claim 1 , wherein each of a third group of the ridges (SX) is imperforate such that at least a portion of the hydraulic fluid supplied from the second axial position is guided past the discs (L) via the third group of ridges (SX), the third group of the ridges (SX) being separate from the first and second groups of the ridges (S).

10. The inner disc carrier (LT) of claim 9 , wherein each of two or more of the first and second groups of the ridges (S) comprises a third opening (A 3 ) through which at least a portion of the hydraulic fluid supplied from the second axial position is guided past the discs (L).

11. The inner disc carrier (LT) of claim 10 , wherein the third openings (A 3 ) are produced by chip-less shaping.

12. The inner disc carrier of claim 10 , further comprising a cylindrical section (LTZ) and a flange section (LTF) adjacent to the cylindrical section (LTZ),
wherein the driving toothing is formed on the cylindrical section (LTZ), and wherein the third openings (A 3 ) are positioned at a transition area between the cylindrical section (LTZ) and the flange section (LTF).

13. A wet-type friction clutch (K 0 ), comprising the inner disc carrier (LT) of claim 1 .

14. A drive train unit (HYM, G) for a motor vehicle, comprising the wet-type friction clutch (K 0 ) of claim 13 .

15. The drive train unit (HYM, G) of claim 14 , wherein an internal combustion engine (VM) of the motor vehicle is selectively connectable to an electric motor (EM) of the drive train unit (HYM, G) via the friction clutch (K 0 ).

16. A drive train unit (HYM, G) for a motor vehicle, comprising:
a wet-type friction clutch (K 0 ) having inner discs (L);
an inner-disc carrier (LT) comprising a driving toothing including ridges (S, SX) and grooves (N) for form-locking accommodation of the inner discs (L) of the friction clutch (K 0 ), each of at least a first group of the ridges (S) comprises a first opening (A 1 ) produced in a chip-less shaping process and a section (ST) extending radially inwardly at the first opening (A 1 ) and created during production of the first opening (A 1 ); and
a hydraulic fluid supply operable to generate a first radial flow of hydraulic fluid and a second radial flow of hydraulic fluid, the first radial flow being associated with a first axial position relative to the inner-disc carrier and the second radial flow being associated with a second axial position relative to the inner-disc carrier, the second axial position being spaced apart from the first axial position,
wherein the first radial flow of hydraulic fluid is guided through the first openings (A 1 ) to the discs (L),
wherein the second radial flow of hydraulic fluid is guided past the discs (L), and
wherein the sections (ST) of the first group of the ridges (S) form a damming contour for preventing the second radial flow of hydraulic fluid from being guided through the first openings (A 1 ).

17. The drive train unit (HYM, G) of claim 16 , wherein an internal combustion engine (VM) of the motor vehicle is selectively connectable to an electric motor (EM) of the drive train unit (HYM, G) via the friction clutch (K 0 ),
the electric motor (EM) having a rotor (R) and a stator (STR), the rotor (R) being rotatably supported by a rotor carrier (RT),
wherein the second radial flow of hydraulic fluid is guided past the discs (L) to an inner side of the rotor carrier (RT).

18. The drive train unit (HYM, G) of claim 16 , wherein the second axial position is axially spaced apart from the inner discs (L).

19. An inner disc carrier (LT) for a wet-type friction clutch (K 0 ), comprising:
a driving toothing including ridges (S, SX) and grooves (N) for form-locking accommodation of discs (L) of the friction clutch (K 0 ), each of at least a first group of the ridges (S) comprises a first opening (A 1 ) produced in a chip-less shaping process and a section (ST) extending radially inwardly at the first opening (A 1 ) and created during production of the first opening (A 1 ),
wherein hydraulic fluid supplied radially from inside the inner disc carrier (LT) from a first axial position is guided through the first openings (A 1 ) to the discs (L),
wherein hydraulic fluid supplied radially from inside the inner disk carrier (LT) from a sec

Assignees

• Zahnradfabrik Friedrichshafen

Inventors

• Riedisser Thomas
• Einenkel Steffen
• Dönges Christian
• Adamski Klemens

Classifications

• F16D2250/003

  Chip removing · CPC title

• B21D53/88

  other parts for vehicles, e.g. cowlings, mudguards · CPC title

• F16D13/683 Primary

  for clutches with multiple lamellae · CPC title

• F16D13/72

  Features relating to cooling · CPC title

• F16D25/123

  in view of cooling and lubrication · CPC title