DE102016213218B4 - Coupling device - Google Patents

Abstract

Clutch device (1, 15, 20), comprising at least one disk pack (2) which comprises outer disks (3) assigned to an outer disk carrier (4) and inner disks (5) assigned to an inner disk carrier (6), the disk pack (2) by means of at least one an actuating element (7) having a force introduction section (9, 16, 21), the at least one force introduction section (9, 16, 21) being deformable and at least one contact section (13, 14, 18) at at least one radial position (10, 11) , 19), which protrudes in the axial direction from the force introduction section (9, 16, 21) in the non-actuated state, the force introduction section (9, 16, 21) in the actuated state over an area on an axially adjacent inner disc (5) or outer disc (3) is applied, the force introduction section (9, 16, 21) initially in contact with a radially outer contact section in contact with a radially outer contact section when the disk set (2) is actuated he axially adjacent inner lamella (5) or outer lamella (3) of the lamella set (2) stands, with an actuating force introduced into the lamella set (2) by means of the force introduction section (9, 16, 21) varying in the radial direction, the force introduction section (9) being in one piece is formed with the actuating element (7), characterized in that the force introduction section (9, 16, 21) to a support section (8, 17) which is located on the side of the lamella set (2) opposite the force introduction section (9, 16, 21) is arranged, is formed correspondingly.

Description

The invention relates to a clutch device according to the preamble of claim 1. In particular, the invention relates to a clutch device, comprising at least one disk set, which comprises outer disks assigned to an outer disk carrier and inner disks assigned to an inner disk carrier, the disk packet being actuatable by means of an actuating element having at least one force introduction section.

Such coupling devices are well known from the prior art. These are used, for example, as multi-disc clutches, in particular as double clutches, in motor vehicles in order to connect an input element to an output element or selectively to a first or a second output element. An actuating element is used to close the disk set or one, which axially compresses the disks, that is to say the inner disks and the outer disks that make up the disk set. Usually, a support section is arranged on the side of the lamella set opposite the actuation element, so that the lamellae are pressed together when the actuation force is introduced between the support section and the actuation element, in particular the force introduction section of the actuation element. This frictional connection allows torques to be transmitted from the inner disk carrier to the outer disk carrier or vice versa.

In the above-described introduction of the actuating force into the disk pack, it is also known that the force introduction section touches the axially adjacent inner disk or outer disk on a fixed friction radius, i.e. initiates the force on this friction radius, for example the edge of a pressure pot. As a result, the introduction of force into the disk pack, at least on the first inner disk or outer disk, is not introduced uniformly into the disk pack, but takes place selectively, depending on the specified friction radius. This results in an uneven load on the lamella set and thus also an uneven heat development on the individual lamellae.

Another prior art is the EP 1 577 575 A1 referenced, from which a multi-plate clutch is known, which can be read on the preamble of claim 1.

The invention is therefore based on the object of specifying a clutch device in which the introduction of force or the actuation of the disk set is more uniform.

To achieve this object, the invention provides for a coupling device of the type mentioned at the outset that the at least one force introduction section is deformable and has at least one contact section in at least one radial position, which protrudes axially from the force introduction section in the non-actuated state, the force introduction section being flat in the actuated state rests against an axially adjacent inner disc or outer disc.

The invention is therefore based on the knowledge that the force introduction section is designed to be deformable in such a way that it can be deformed by the actuating force. The force introduction section is preformed in accordance with the desired force distribution and accordingly has a shape which enables the actuating force to be introduced more uniformly into the disk pack. Of course, depending on the respective shape of the force introduction section, other force distributions and thus surface pressures are also possible.

In particular, the force introduction section has at least one contact section in at least one radial position. In the non-actuated state, that is, when no actuating force is acting on the force introduction section, the contact section protrudes in the axial direction from the force introduction section. When the disk pack is actuated, i.e. when the actuating element is moved towards the disk pack, so that the contact section comes into contact with the axially adjacent inner disk or outer disk, the force application section is deformed by the actuating force acting on the contact section. Accordingly, the force introduction section, which is initially in contact with the inner lamella or the outer lamella only via the contact section, is deformed so that it lies flat in the actuated state. More than one contact section can preferably be provided, in particular the force introduction section can have two contact sections.

This offers the advantage that the actuating force is not only introduced into the lamella set on a single friction radius, but is introduced uniformly into the lamella set through the deformation of the force introduction section and the subsequent flat contact between the force introduction section and the adjacent lamella. In other words, the force introduction section is deformed in such a way that the force, for example optimized for a specific torque, is uniform over the entire surface of the axially adjacent inner disc or outer disc is initiated distributed. This results in a constant surface pressure on the package and thus a uniform heat development due to the friction.

In the coupling device according to the invention it is provided that the force introduction section is formed in one piece with the actuating element. Accordingly, the force introduction section and the actuating element can be designed as one component. The actuating element can be designed, for example, as a pressure pot, the force introduction section being designed in a preformed manner.

An alternative to the coupling device according to the invention can consist in that the force introduction section is designed as a separate component and is coupled to the actuating element. Accordingly, it can be provided that the actuating element is designed, for example, as a pressure pot and transmits the actuating force to the separately designed force introduction section. When the actuating force is introduced, it can deform in order, as described above, to bring about a defined, in particular uniform, introduction of force into the disk pack.

It can particularly preferably be provided that the force introduction section is designed as a deformation element. In the context of this application, a deformation element is understood to be an elastic component that is deformable when a force is introduced. The deformation element is preferably made of plastic, in particular an elastomer, or comprises such a material. Depending on the selected actuation force, it is also possible to manufacture the deformation element from metal or a fiber-reinforced plastic. This has, for example, a U-shaped cross section, the actuating element exerting the actuating force essentially on the apex of the U-shape, so that the deformation element can deform and ensure a uniform introduction of the actuating force into the disk pack.

The clutch device according to the invention is further developed in such a way that the force introduction section is designed to correspond to a support section which is arranged on the side of the disk set opposite the force introduction section. Accordingly, it can be provided that the force introduction section is preformed in such a way that it is designed to correspond to the support section, which is arranged on the opposite side of the lamella set. In other words, when a force is introduced into the disk pack, the force introduction section is deformed and pressed against the disk of the disk pack axially adjacent to it, so that the inner disks and the outer disks of the disk pack move axially in the direction of the support section, so that when the disk pack is closed, the inner disks and the Outer lamellae are pressed together between the support section and the force application section. Due to the corresponding design of the force introduction section and the support section, the uniform introduction of the actuating force into the disk pack can be further improved, since these allow a flat contact from both sides.

It can therefore be provided that the support section is designed to correspond to the force introduction section and is also deformed when force is introduced, so that the support section, analogously to the force introduction section, lies flat when the disk pack is actuated or when the partial clutch is actuated. Thus, both on the side of the force introduction section and on the side of the support section, a flat contact with the inner plate or outer plate adjacent in the axial direction is ensured. Alternatively, it is also possible that the support section is already flat or has a rigid shape such that it does not deform when the force is introduced, so that only the force introduction section is deformed by the actuating force.

A preferred embodiment of the clutch device according to the invention provides that, when the disk set is actuated, the force introduction section is initially in contact with an axially adjacent inner disk or outer disk of the disk set with a radially inner or radially outer contact section in front of the flat contact. According to this embodiment, the force introduction section is not designed symmetrically, so that one of the at least two contact sections first comes into contact with the axially adjacent outer plate or inner plate. With the further introduction of the actuating force, i.e. a further movement of the actuating element towards the disk pack, the force introduction section is deformed so that the at least one further contact section also comes into contact with the inner disk or the outer disk and then a flat contact between the force introduction section and the corresponding lamella is made. Different distributions of the actuating force over the surface of the inner disk or the outer disk can thus advantageously be achieved.

It can particularly preferably be provided that an actuating force introduced into the disk pack by means of the force introduction section is uniform in the radial direction or varies in the radial direction. Depending on the configuration of the force introduction section or the contact sections of the force introduction section, can be achieved be that the introduction of the actuating force varies in the radial direction. For this purpose, it is provided that one of the two contact sections first comes into contact with the axially adjacent outer lamella or inner lamella, so that the force is initially introduced there.

It is particularly preferred that the actuating force decreases linearly from the inside out. It can thus advantageously be achieved that a higher force is applied to the inner area of the lamellas, so that more heat is generated due to the friction. Thanks to the cooling oil that is led from the inside to the outside, the heat inside can be better dissipated, since the cooling oil is still unheated there. In their outer areas, the inner lamellae and the outer lamellae are less able to dissipate heat in relation to the surface, since there the cooling oil is already warmed up by absorbing the heat from the inner areas of the lamellae. This can be taken into account by the linear distribution of the introduction of force and thus the heat development over the lamellae of the lamella set, so that the cooling of the lamellar set can be improved.

• 1 eine erfindungsgemäße Kupplungseinrichtung gemäß einem ersten Ausführungsbeispiel;
• 2 die erfindungsgemäße Kupplungseinrichtung in betätigtem Zustand;
• 3 eine erfindungsgemäße Kupplungseinrichtung gemäß einem zweiten Ausführungsbeispiel;
• 4 eine erfindungsgemäße Kupplungseinrichtung gemäß einem dritten Ausführungsbeispiel; und
• 5 eine erfindungsgemäße Kupplungseinrichtung gemäß einem vierten Ausführungsbeispiel.

The invention is explained below on the basis of exemplary embodiments with reference to the drawings. The drawings are schematic representations and show:

• 1 a coupling device according to the invention according to a first embodiment;
• 2 the clutch device according to the invention in the actuated state;
• 3 a coupling device according to the invention according to a second embodiment;
• 4th a coupling device according to the invention according to a third embodiment; and
• 5 a clutch device according to the invention according to a fourth embodiment.

1 shows a coupling device 1 in a schematic sectional view. The coupling device 1 includes a disk pack 2 , which schematically consists of two outer lamellae 3 that have an outer disc carrier 4th are assigned and an inner lamella 5 that have an inner disc carrier 6 is assigned, is formed. The lamella pack 2 is between an actuator 7th and a support section 8th arranged. The support section 8th is in one piece with the outer plate carrier 4th educated. The actuator 7th has a force introduction section 9 on, which is in two radial positions 10 , 11 with respect to an axis of rotation 12 the coupling device 1 two contact sections 13 , 14th having.

The force introduction section can be seen 9 integral with the actuator 7th educated. The force introduction section 9 is also approximately corresponding to the support section 8th educated. When the plate pack is actuated 2 , i.e. when a force is introduced by the actuating element 7th becomes the actuator 7th on the plate pack 2 moved so that the contact sections 13 , 14th in contact with the outer disc adjacent in the axial direction 3 come. The outer blades 3 and the inner lamella 5 thus become the support section in the axial direction 8th shifted and compressed in the axial direction, so that the frictional connection between the outer plates 3 and the inner lamella 5 will be produced. The force introduction section is deformed in the process 9 , so that in the case of the initially punctual contact via the contact sections 13 , 14th when the actuating force is fully introduced, the entire force introduction section 9 flat on the outer lamella 3 , which is axially adjacent to it, rests. This ensures that the actuating force is evenly introduced into the disk pack 2 guaranteed.

2 shows the coupling device 1 from 1 in actuated state. It can be seen that the actuating element 7th with its force introduction section 9 on the axially adjacent outer plate 3 of the lamella pack 2 is flat. The force introduction section became due to the actuation force 9 accordingly deformed, so that a flat, uniform contact between the force introduction section and the adjacent outer lamella 3 is present, so that a uniform introduction of the actuating force into the disk pack 2 given is.

Of course, it is also possible that the contact sections 13 , 14th differently far in the axial direction from the force introduction section 9 protrude and when actuated one after the other in contact with the adjacent outer plate in the axial direction 3 come. For example, the contact section 13 before the contact section 14th come into investment or vice versa. According to this, there is a defined introduction of force into the plate pack 2 possible.

3 shows a coupling device 15th according to a second embodiment, the basic structure of the coupling device 1 from 1 corresponds. The same components are therefore provided with the same reference symbols. In contrast to the coupling device 1 from 1 has the coupling device 15th , in the 3 is shown, a force introduction section 16 on, which is separate from the actuator 7th is trained. According to this embodiment is the force introduction section 16 designed as a sheet metal, which is in the toothing of the outer disk carrier 4th is arranged. On the opposite side of the plate pack 2 is a support section 17th provided, which is also separate from the outer disk carrier 4th is formed and in this embodiment to the outer disk carrier 4th is welded on.

The force introduction section 16 again has two contact sections 18th , 19th on, when a force is introduced by means of the actuating element 7th first in contact with the axially adjacent outer lamella 3 come. In the event of a further introduction of force, that is to say an increase in the actuating force, the force introduction section designed as a sheet metal deforms 16 so that it is flat with the outer plate adjacent in the axial direction 3 comes to the plant. This ensures that the actuation force is applied evenly. Of course, the contact sections are also possible in all the exemplary embodiments 13 , 14th , 18th , 19th in different axial positions, that is to say at different distances from one another in the axial direction from the force introduction section, so that an uneven distribution of the actuating force in the disk pack 2 he follows. For example, the contact section 18th further in the axial direction from the force introduction section 16 protrude than the contact section 19th so that the actuation force in the disk pack 2 radially inside is more pronounced than radially outside.

4th shows a coupling device 20th according to a third embodiment. The coupling device 20th corresponds to the basic structure after the coupling devices 1 and 15th from the 1 and 2 . In contrast to the coupling devices 1 and 15th has the coupling device 20th a force introduction section 21st on, which is designed as a deformation element. The deformation element is made from an elastomer, for example. When the actuating force is introduced by means of the actuating element 7th the deformation element deforms elastically and causes a uniform introduction of the force into the disk pack 2 .

5 shows a coupling device according to the invention 22nd according to a fourth embodiment, which corresponds to the basic structure according to the coupling devices 1, 15 and 20. In contrast to the coupling devices 1 , 15th and 20th has the coupling device 22nd a force introduction section 23 on, the one contact section 24 having. The contact section 24 is in the radial position 11 arranged. When actuating the lamella pack 2 , so if the actuator 7th in the direction of the plate pack 2 is moved, the contact section comes 24 first in the axial direction in contact with the adjacent outer plate 3 . By actuating the lamella pack 2 or the actuating force applied becomes the force introduction section 23 deformed, so that a flat contact of the force introduction section 23 on the outer lamella 3 is guaranteed. This ensures that the actuation force is evenly applied to the disk pack 2 is initiated.

Of course, all of the details and combinations shown in the exemplary embodiments can be combined with one another as desired, provided that this is technically sensible.

List of reference symbols

1

Coupling device

2

Disk pack

3

Outer lamella

4th

Outer disc carrier

5

Inner lamella

6th

Inner disc carrier

7th

Actuator

8th

Support section

9

Force introduction section

10

Radial position

11

Radial position

12

Axis of rotation

13

Contact section

14th

Contact section

15th

Coupling device

16

Force introduction section

17th

Support section

18th

Contact section

19th

Contact section

20th

Coupling device

21st

Force introduction section

22nd

Coupling device

23

Force introduction section

24

Contact section

Claims (4)

Clutch device (1, 15, 20), comprising at least one disk pack (2) which comprises outer disks (3) assigned to an outer disk carrier (4) and inner disks (5) assigned to an inner disk carrier (6), the disk pack (2) by means of at least one a force introduction section (9, 16, 21) having The actuating element (7) can be actuated, the at least one force introduction section (9, 16, 21) being deformable and having at least one contact section (13, 14, 18, 19) in at least one radial position (10, 11), which in the non-actuated state in In the axial direction protrudes from the force introduction section (9, 16, 21), the force introduction section (9, 16, 21) in the actuated state lying flat against an axially adjacent inner lamella (5) or outer lamella (3), the force introduction section (9, 16, 21) when the disk set (2) is actuated in front of the flat contact, initially with a radially outer contact section in contact with an axially adjacent inner disk (5) or outer disk (3) of the disk set (2), one being by means of the force introduction section (9, 16, 21) in the disk pack (2) introduced operating force varies in the radial direction, the force introduction section (9) formed in one piece with the actuating element (7) det is characterized in that the force introduction section (9, 16, 21) is designed to correspond to a support section (8, 17) which is arranged on the side of the lamella set (2) opposite the force introduction section (9, 16, 21) . Coupling device according to Claim 1 , characterized in that the force introduction section (16, 21) is designed as a separate component and is coupled to the actuating element (7). Coupling device according to Claim 2 , characterized in that the force introduction section (21) is designed as a deformation element. Coupling device according to one of the preceding claims, characterized in that the actuating force decreases linearly from the inside to the outside.

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