Friction clutch for a motor vehicle powertrain, powertrain unit, transmission unit, and powertrain

Patent metadata

Field	Value
Publication number	US-11370290-B2
Application number	US-201915733999-A
Country	US
Kind code	B2
Filing date	May 10, 2019
Priority date	Jun 4, 2018
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A friction clutch includes a reference plane aligned perpendicular to a rotational axis, a first clutch component, and a second clutch component. The first clutch component has a first friction element, a first support part that receives the first friction element, a leaf spring unit including a leaf spring that rotationally fixes the second support part to the first support part. The second clutch component has a second friction element. The first friction element lies against the second friction element in a frictionally locking manner in a closed position, and is axially spaced from the second friction element in an open position. The leaf spring is designed and positioned relative to the reference plane in a set angle in the closed position such that an additional axial force is applied to the first friction element and the second friction element in a drive rotational direction of the first clutch component.

First claim

The invention claimed is:

1. A friction clutch for a motor vehicle powertrain, comprising:
a rotational axis;
a reference plane aligned perpendicular to the rotational axis;
an input shaft arranged for a rotationally fixed attachment to a transmission output shaft;
a first clutch component comprising:
a first friction element;
a first support part that receives the first friction element;
a leaf spring unit comprising a leaf spring; and
a second support part rotationally fixed to:
the first support part by the leaf spring unit; and
the input shaft; and

a second clutch component comprising:
a second friction element; wherein:

the first friction element lies against the second friction element in a frictionally locking manner in a closed position of the friction clutch;
the first friction element is axially spaced from the second friction element in an open position of the friction clutch; and
the leaf spring is designed and positioned relative to the reference plane in a set angle in the closed position such that an additional axial force is applied to the first friction element and the second friction element in a drive rotational direction of the first clutch component.

2. The friction clutch of claim 1 , wherein the leaf spring unit comprises a plurality of leaf springs arranged to form a leaf spring assembly.

3. The friction clutch of claim 1 , further comprising a plurality of leaf spring units arranged distributed along a circumference of the support parts.

4. The friction clutch of claim 1 wherein the leaf spring unit is arranged radially inside the friction elements.

5. The friction clutch of claim 1 further comprising:
an actuating force introduction mechanism:
operatively connected to an axial force actuator;
received on the second support part; and
comprising a lever element or a pressure pot.

6. The friction clutch of claim 5 wherein the actuating force introduction mechanism comprises a pressing plate:
connected to the first support part; and
arranged for acting on the first friction element and the second friction element in a displaceable manner.

7. A powertrain unit for a hybrid vehicle, comprising:
a powertrain unit output shaft; and
the friction clutch of claim 1 operatively arranged between the input shaft and the powertrain unit output shaft.

8. A transmission unit for a hybrid vehicle, comprising:
the powertrain unit of claim 7 ; and
a transmission comprising the transmission output shaft rotationally fixed to the input shaft.

9. The powertrain for the hybrid vehicle, comprising:
the transmission unit of claim 8 ; and
a differential gear coupled to the powertrain unit output shaft in a rotationally fixed manner.

Assignees

• Schaeffler Technologies Ag

Inventors

• Finkenzeller Marc
• Keller Aurelie

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• F16D13/72

  Features relating to cooling · CPC title

• F16D2023/126

  Actuation by rocker lever; Rocker levers therefor · CPC title

• B60K6/387 Primary

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

• B60K6/405

  Housings · CPC title