Pressure medium-actuated separating clutch which is normally closed, comprising an actuation device which rotates therewith and axially overlaps with a damper device

Patent metadata

Field	Value
Publication number	US-2023286367-A1
Application number	US-202118019534-A
Country	US
Kind code	A1
Filing date	Jul 7, 2021
Priority date	Aug 4, 2020
Publication date	Sep 14, 2023
Grant date	—

Abstract

A separating clutch for a powertrain includes a rotational axis, a friction pack for transmitting a torque in an engaged state, a damper device having a torsional vibration damper or a centrifugal pendulum, and an actuation device for selectively releasing the engaged state. The actuation device is arranged in an axial overlap with the damper device. The friction pack may include a friction disk, a pressure plate, a counter-plate, a pressure pot, and a disk spring supported between the counter-plate and the pressure pot. The friction disk may have a friction surface and the pressure pot may extend through the counter-plate to contact the pressure plate, radially outside of the friction surface, and the actuation device, radially inside of the friction surface. The actuation device may include a pressure chamber with a pressure piston, and the pressure piston may be axially movable and arranged radially within the friction pack.

First claim

1 . A separating clutch with a rotational axis for a powertrain, comprising:
a normally-closed friction pack for transmitting a torque in an engaged state; a co-rotating hydrostatic actuation device for switchable release of the engaged state of the friction pack; and a damper device comprising a torsional vibration damper or a centrifugal pendulum, wherein the co-rotating hydrostatic actuation device is arranged in an axial overlap with the damper device in an extended state.

2 . The separating clutch according to claim 1 , wherein
the friction pack comprises a friction disk, a pressure plate, a counter-plate, a pressure pot and a disk spring; and the disk spring is supported between the counter-plate and the pressure pot.

3 . The separating clutch according to claim 2 , wherein
the pressure pot is arranged extending through the counter-plate for force-transmitting contact with:
the pressure plate, radially outside a friction surface of the friction disk, and
the co-rotating hydrostatic actuation device, radially inside the friction surface of the friction disk.

4 . The separating clutch of claim 1 , wherein
the co-rotating hydrostatic actuation device comprises a pressure chamber having an axially movable pressure piston which is radially arranged within the friction pack.

5 . The separating clutch according to claim 4 , wherein
the pressure piston has a radial outer section and a radial inner section, a step is formed between the radial outer section and the radial inner section, the step having a wall section with an axial extension, and a gap space is formed within the axial extension between the wall section and a corresponding lateral rear wall of the pressure chamber.

6 . The separating clutch according to claim 5 , wherein
the pressure piston is formed radially outside a sealing wall; the lateral rear wall is lateral to the sealing wall; the pressure chamber is formed to be parallel to the lateral rear wall; the separating clutch comprises a radial external seal to the sealing wall of the pressure piston; and the pressure piston is centered by means of the radial external seal.

7 . The separating clutch according to claim 2 , wherein
the friction disk is permanently torque-transmittingly connected to the damper device by means of splines.

8 . A powertrain, comprising:
at least one drive machine having a machine shaft; a transmission for transmitting a torque of the machine shaft to a consumer; and the separating clutch of claim 1 , wherein a torque between at least one of the drive machines and the consumer can be releasably transmitted by means of the separating clutch.

9 . A motor vehicle having
at least one drive wheel which can be driven by means of the powertrain according to claim 8 for propelling the motor vehicle.

10 . A separating clutch for a powertrain, comprising:
a rotational axis; a friction pack for transmitting a torque in an engaged state; a damper device comprising a torsional vibration damper or a centrifugal pendulum; and an actuation device for selectively releasing the engaged state, the actuation device being arranged in an axial overlap with the damper device.

11 . The separating clutch of claim 10 , wherein the friction pack comprises:
a friction disk; a pressure plate; a counter-plate; a pressure pot; and a disk spring supported between the counter-plate and the pressure pot.

12 . The separating clutch of claim 11 , wherein:
the friction disk comprises a friction surface; and the pressure pot extends through the counter-plate to contact:
the pressure plate, radially outside of the friction surface; and
the actuation device, radially inside of the friction surface.

13 . The separating clutch of claim 10 , wherein:
the actuation device comprises a pressure chamber having a pressure piston; and the pressure piston is axially movable and arranged radially within the friction pack.

14 . The separating clutch of claim 12 wherein:
the actuation device comprises a pressure chamber having a pressure piston;
the damper device comprises a damper hub; and
the pressure piston is arranged radially within a torque connection between the friction disk and the damper hub.

15 . The separating clutch of claim 13 , wherein:
the pressure piston comprises:
a radial outer section;
a radial inner section;
a step comprising a wall section between the radial outer section and the radial inner section, the wall section comprising a first axial extension;
the pressure chamber comprises a lateral rear wall; and a gap space is formed between the wall section and the lateral rear wall, the gap space comprising a second axial extension.

16 . The separating clutch of claim 15 further comprising a seal disposed in the lateral rear wall, wherein:
the pressure piston comprises a sealing wall; and
the lateral rear wall is parallel to the sealing wall.

17 . The separating clutch of claim 16 wherein the pressure piston is centered by the seal.

18 . The separating clutch of claim 11 , wherein the friction disk is permanently torque-transmittingly connected to the damper device.

19 . The separating clutch of claim 11 , wherein the friction disk is permanently torque-transmittingly connected to the damper device by splines.

Assignees

• Schaeffler Technologies Ag

Inventors

• Finkenzeller Marc

Classifications

• F16F15/13121

  characterised by clutch arrangements, e.g. for activation; integrated with clutch members, e.g. pressure member · CPC title

• F16D13/70

  Pressure members, e.g. pressure plates, for clutch-plates or lamellae; Guiding arrangements for pressure members {(clutch flywheels comprising two or more masses with a rotational damper F16F15/12)} · CPC title

• B60K2006/4825

  Electric machine connected or connectable to gearbox input shaft · CPC title

• B60K6/387 Primary

  Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means · CPC title

• F16D25/0635 Primary

  with flat friction surfaces, e.g. discs · CPC title