CN106468316B

CN106468316B - Driving unit for clutch device

Info

Publication number: CN106468316B
Application number: CN201610693982.6A
Authority: CN
Inventors: T·奥萨德尼克
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2015-08-19
Filing date: 2016-08-19
Publication date: 2021-02-12
Anticipated expiration: 2036-08-19
Also published as: CN106468316A; DE102015215817A1; DE102015215817B4

Abstract

The driving unit for a multiplate clutch device comprises: a rotational axis; an element which is mounted so as to be rotatable about an axis of rotation, said element having radial teeth for transmitting forces acting in the circumferential direction; a driving disk which is connected to the element in the region of the toothing in a force-fitting manner; and a support element having a radial projection. In the region of the toothing, a radial recess is provided through which the projection extends in the radial direction. The projection engages the recess in a radially outward manner in order to fix the toothing in a form-locking manner radially outward.

Description

Driving unit for clutch device

Technical Field

The present invention relates to a clutch device, for example for a drive train of a motor vehicle. In particular, the invention relates to a driver unit for a clutch device.

Background

The clutch device is provided for selectively establishing a frictional engagement between the first and second friction elements. The clutch device can be arranged, for example, in a drive train of a motor vehicle between the drive motor and the transmission. The clutch device has a rotational axis about which the radially inner friction element carrier and the radially outer friction element carrier are rotatably mounted. The first friction element is connected to the outer friction element carrier in a torque-locking manner and is axially displaceable, and the second friction element is connected to the inner friction element carrier in a corresponding manner. If the friction elements are pressed against one another in the axial direction, a frictional connection is formed, so that torque can be transmitted between the outer friction element carrier and the inner friction element carrier.

In particular, the external friction element carrier is often pot-shaped, with a radial section engaging on a substantially cylindrical axial section. When the outer friction element carrier is rotated about the axis of rotation, it is subjected to an increasing centrifugal force on the axial side of the axial section opposite the radial section. This may deform the friction element carrier, which may result in damage to the clutch device. To prevent this, a so-called catch ring is usually arranged on the outer friction element carrier, which catch ring is situated radially on the outside of the axial section and acts counter to the centrifugal force. However, the manufacture and assembly of the capture ring can be costly, which may incorporate cost disadvantages.

EP 1382872 a1 proposes that the driver disk forming the radial portion is connected in a form-locking manner to the axial portion of the outer clutch plate carrier by means of dovetail-shaped projections, so that these projections can support forces acting radially outward.

Disclosure of Invention

The object of the present invention is to provide a relatively versatile possibility for rotatably supporting elements of a driver unit for a multi-disk clutch device against centrifugal forces. .

The driving unit for a multiplate clutch device comprises: a rotational axis; an element which is mounted so as to be rotatable about a rotational axis and has radial teeth for transmitting forces acting in the circumferential direction; a driving disk which is connected to the element in the region of the toothing in a force-fitting manner; and a support element having a radial projection. In the region of the teeth, radial recesses are provided through which the projections extend in the radial direction. The projection engages (hittergrip) the recess radially on the outside in order to fix the toothing in a form-locking manner to the outside.

By separating the function of the driving disk from the support element, there is a greater flexibility in the arrangement of the driving disk. In particular, the driving disk can be formed integrally with the rotatable element. In addition, the support element can also be used advantageously on a further rotatable element of the multiplate clutch device. The expenditure required for providing the support ring can be eliminated. The support element can be embodied integrally with a further component of the multiplate clutch device.

The projections are preferably provided for a form-fitting engagement in the recesses of the teeth in the radial direction and/or in the tangential direction or in the circumferential direction. The support element can thereby be connected to the rotatably mounted element in a torque-locking manner if required.

Preferably, the projection is prestressed in the radial direction with respect to the toothing in such a way that, when the driver unit is in a state in which rotation about the axis of rotation is stopped, the section bears radially on the outside against the toothing. Deformation of the rotatable element under the influence of the rotational speed can thus be prevented efficiently. As a result, an imbalance or functional impairment of the multiplate clutch device can be avoided in an improved manner. However, in another embodiment, there may be a predetermined radial clearance between the protrusion and the tooth.

In one embodiment, a section of the projection is located in a radially outer groove extending around the axis of rotation. The support element can thereby also be fixed in the axial direction. The groove can be introduced into the rotatably mounted element from the radially outer side, for example, by punching or milling.

It is particularly preferred that the toothing consists of a plate of constant thickness. The formation of the recess and the assembly of the support element can thus be carried out particularly simply.

In a further preferred embodiment, the element is designed pot-shaped with a hollow cylindrical section and a radial section adjoining axially on one side, wherein the support element is axially spaced as far away from the radial section as possible. The usual design shape of the friction element carrier, in particular of the outer friction element carrier, can thus be designed simply with the support element.

Furthermore, it is preferred that the support element has a plurality of projections which are arranged on a circumference about the axis of rotation, wherein the projections extend radially through associated recesses in the teeth and engage back around the teeth. It is particularly preferred that the support element is of disc-like design. The forces acting in the radial direction on the rotatable elements can thus be counteracted with respect to one another in a simple manner.

A clutch device comprises the driver unit described above, wherein the rotatable element is designed as a friction element carrier. Further, the clutch device includes: a plurality of first friction elements for positive fit into the rotatable element in the circumferential direction; a plurality of second friction elements alternately arranged with the first friction elements in the axial direction; and an engagement element for positive engagement with the second friction element in the circumferential direction.

In this case, it is particularly preferred that the support element is embodied in one piece with one of the first friction elements. It is also preferred that the support element bears against an axial end of the stack of alternating friction elements. On the one hand, a supporting effect can thereby be achieved at an axially advantageous point, and on the other hand, the frictional heat that arises can be dissipated in an improved manner by the improved thermal attachment of the supporting element to the rotatable element, which is caused by the section.

The first friction element may be designed as a clutch plate, wherein the axial thickness of the support element is smaller than the axial thickness of the remaining clutch plates. This embodiment can be easily implemented because the support element is usually produced by means of a different manufacturing method than the remaining clutch plates. Axial installation space can be saved by the reduced axial thickness. In particular when the support element bears against an axial end of the friction element stack, the reduced mechanical or thermal load can be used to advantage in this way.

Drawings

The invention will now be described in detail with reference to the accompanying drawings, in which:

fig. 1 shows an exploded view of a driving unit of a multiplate clutch device;

fig. 2 shows a detail of the assembled driving unit of fig. 1;

fig. 3 shows a sectional view of a detail of the driving unit of fig. 1;

FIG. 4 shows a radial dual clutch with a rotational speed safety device via a pressure ring; and

fig. 5 shows an axial double clutch with a rotational speed safeguard on the pressure pot.

Detailed Description

Fig. 1 shows an exploded view of a multi-plate clutch driver unit 100. The element 110 with the radial toothing 115 is mounted so as to be rotatable about the axis of rotation 105. The illustrated element 110 is designed as an outer clutch plate carrier of a multiplate clutch device. The element 110 here comprises, by way of example, an axial section 120, which carries the teeth 115 and is preferably constructed from a sheet metal of constant thickness, and a radial section 125, which in particular integrally engages on an axial end of the section 120 and extends radially inward therefrom. The element 110 thus has a basic shape resembling a can. The radial section 125 may also be eliminated in another embodiment. The toothing 115 is provided for the purpose of connecting an element, in particular a friction element, to the element 110 in a manner that can be moved in the axial direction and that is cohesive in the circumferential direction.

The support element 130 is preferably embodied in the form of a disk about the axis of rotation 105 and comprises one or more projections 135 which extend outward in the radial direction. For each of these projections 135, an associated recess 140 is provided on the element 110 or the axial section 120 or the toothing 115, which for assembly purposes is preferably open on one side in the axial direction. These projections 135 each have at least one section 145, which is hooked back radially outward to the notch 140 assigned to it. By way of example, these projections 135 are V-shaped or embodied in a dovetail form. There is a relatively large degree of freedom in terms of the shaping of the projection 135. In various embodiments, a form-locking or force-locking in the circumferential direction can be achieved simultaneously by the projections 135 in the recesses 140. The support element 130 is preferably designed as a flat element, which can be stamped out of a flat sheet, for example. The elements 110 are supported radially outward in this region by the sections 145 being counter-hooked behind the notches 140. If a sufficient number of projections 135 are arranged distributed over the circumference about the rotational axis 105, those forces acting radially outward on the rotatable element 110 can be transmitted to the support element 130 and compensate one another there.

It is particularly preferred that the projections 135 are prestressed in the radial direction in such a way that they rest, for example, radially on the outside against the rotatably mounted element 110 when the element has not yet been rotated about the axis of rotation 105. In the region of the portion 145, a radial recess can be provided on the rotatable element 110 in order to fix the axial position of the support element 130. Through the embodiment of the recess 140 that is open on one side, it is preferred that: the support element 130 is arranged in the region of one axial end of the rotatable element 130. However, if the recess 140 is sufficiently deep in the axial direction, the support element 130 can also be arranged in the middle region of the axial extent of the rotatably mounted element 110. In the illustrated pot-shaped embodiment of the element 110 with the radial portion 125, it is furthermore preferred that the axial distance of the support element 130 from the radial portion 125 is as large as possible in order to maximize the radial supporting effect.

A driving disk 150 is provided separately from the support element 130 and can be connected to the rotatable element 110 in a force-fitting manner. For this purpose, the driver disk 150 can be designed in one piece with the element 110, for example, connected in a material-locking manner, for example by welding, or, as shown in fig. 1, it has teeth 155, which are provided for a form-locking engagement in the teeth 115 or the recesses 140. Optionally, a securing ring 160 for axially securing the driving disk 150 can be provided on the rotatable element 110.

Fig. 2 shows a detail of the assembled driver unit 100 of fig. 1. In the embodiment shown, the support element 130 bears axially against a driver disk 150, on the opposite axial side of which a securing ring 160 is located. Thus, the support element 130 is spaced a substantial distance from the radial section 125 in the axial direction.

In the embodiment shown, the rotatable element 110 represents a friction element carrier, in particular a clutch plate carrier, in which the support element 130 can be used independently in the first embodiment and is inserted as a clutch plate in the second embodiment, which can be frictionally engaged in the axial direction with another friction partner, as will be described in more detail below with reference to fig. 4 and 5. The axial position of the support element 130 is independent of whether the friction partner is compressed in the axial direction. A good thermal attachment can be achieved by the support element 130 abutting against the rotatable element 110 in the region of the projections 135 or the segments 145, which thermal attachment can allow the support element 130 to be dimensioned differently in the axial direction than further friction elements which are in an axially movable fit with the rotatable element 110. In particular, the support element 130 can be embodied thin.

Fig. 3 shows a sectional view of a detail of the driver unit 100 of fig. 1.

Fig. 4 shows a radial dual clutch 400 with a rotational speed safeguard. The dual clutch 400 comprises a first clutch 405, which is radially inner and a second clutch 410, which is radially outer. However, with the proposed concept of radially outwardly supporting the rotatable element 110, another configuration can also be selected and only one

clutch

405, 410 can also be provided. Each of these

clutches

405, 410 is implemented as a multiplate clutch device.

Referring to the radially inner clutch 405, the rotatable element 110 is embodied as an outer clutch plate carrier. A plurality of first friction elements 415 are torque-fit and axially movably engaged in first element 110. The first friction elements 415 are arranged in the axial direction alternately with the second friction elements 420, which are fitted in the friction element carrier 425 on their radially inner side in a torque-locking and axially displaceable manner. If the clutch pack formed by the first and

second friction elements

415, 420 is compressed in the axial direction, a torque can be transmitted between the rotatable element 110 (outer friction element carrier) and the inner friction element carrier 425. The corresponding axial actuating device 430 is embodied hydraulically.

As an axial support against the pressing force exerted by the actuating device 430, a pressure ring is provided, which is embodied integrally with the support element 130. The securing ring 160 is here responsible for the axial support of the support element 130. Projections 135 (not visible) are formed on the support element 130, which projections are responsible for radially outwardly supporting the rotatable element 110, as described in more detail above with reference to fig. 1 to 3.

Fig. 5 shows an axial dual clutch 500 as a further exemplary embodiment of the proposed radial support of the rotatable element 110 on the multiplate clutch device. The

clutches

405 and 410 are here arranged in an axially offset manner.

In order for the actuating device 430 to be able to apply an axial pressing force to the clutch pack of the first and

second friction elements

415, 420, a pressure pot 505 is provided, which generally has a plurality of fingers 510 extending in the axial direction, which extend through recesses in the clutch pack of the second clutch 410 as far as the first clutch 405. The transmission element 515 receives the transmitted actuating force and transmits the transmitted actuating force further to the clutch group formed by the first and

second friction elements

415, 420 of the first clutch 405. The point of action of the actuating force is optionally offset radially inward. The transmission element 515 is configured as a support element 130 and the pressing pot 505 represents the rotatable element 110 in the previous figures. It is proposed that the above-described radial support of the pressing pot 505 is achieved by means of the projections 135 by means of the transmission element 515. The driving disk 150 is embodied in the embodiment shown as a single piece with the outer clutch disk carrier 520.

The proposed radial support of the rotatable element 110 can be used advantageously at different points of the multiplate

clutch device

400, 500. Although the preferred embodiment provides the dual function of the support element 130 as the first friction element 415 (see fig. 1 to 3), the proposed combination of the recess 140 and the projection 135 can also be used, independently of the driver plate 150, at a further, completely different point of the multiplate

clutch device

400, 500.

List of reference numerals

100 portable unit

105 axis of rotation

110 element

115 tooth part

120 axial segment

125 radial segment

130 support element

135 projection

140 gap

145 section

150 driving plate

155 tooth part

160 safety ring

400 radial double clutch

405 first clutch

410 second clutch

415 first Friction element

420 second friction element

425 Friction element holder

430 manipulator

500 axial double clutch

505 pressing pot

510 finger part

515 transfer element

520 outer clutch plate support

Claims

1. Driver unit (100) for a multiplate clutch device, wherein the driver unit (100) comprises the following parts:

-a rotation axis (105);

-a rotatable element (110) which is mounted rotatably about the axis of rotation (105) and has radial teeth (115) for transmitting forces acting in the circumferential direction;

a driving disk (150) which is connected in a force-fitting manner to the rotatable element (110) in the region of the toothing (115);

-a support element (130) having a radial protrusion (135),

-wherein a radial indentation (140) is provided in the region of the toothing (115);

-and, the protrusion (135) extends radially through the notch (140),

-wherein the projection (135) hooks back radially outward into the recess (140) in order to fix the toothing (115) radially outward in a form-locking manner, the projection (135) being prestressed in the radial direction relative to the toothing (115).

2. The driver unit (100) according to claim 1, wherein the protrusion (135) is provided for fitting into the indentation (140) of the toothing (115) in a form-fitting manner in a radial direction and/or in a tangential direction.

3. The driver unit (100) according to claim 1, wherein the projection (135) has at least one section (145), the section (145) bearing radially outward against the toothing (115) when the driver unit (100) is in a state of rotation stop about the axis of rotation (105).

4. The driver unit (100) according to claim 3, wherein a section (145) of the projection (135) is in a radially outer arranged groove extending around the axis of rotation (105).

5. The driver unit (100) according to claim 1, wherein the toothing (115) is constituted by a plate of constant thickness.

6. The driver unit (100) according to claim 1, wherein the rotatable element (110) is pot-shaped with a hollow cylindrical section (120) and a radial section (125) adjoining on one side in the axial direction, wherein the support element (130) is axially as far away from the radial section (125) as possible.

7. The driver unit (100) according to any one of the preceding claims 1 to 6, wherein the support element (130) has a plurality of projections (135) arranged on a circumference around the rotational axis (105), wherein the projections (135) extend radially through associated notches (140) in the toothing (115) and unhook the toothing (115).

8. Clutch device (400, 500) comprising a driver unit (100) according to any one of the preceding claims 1 to 7, wherein the rotatable element (110) is configured as a friction element carrier (425), the clutch device further comprising: a plurality of first friction elements (415) for positive fit into the rotatable element (110) in a circumferential direction; a plurality of second friction elements (420) arranged alternately with the first friction elements (415) in an axial direction; and an engagement element for positive engagement with the second friction element (420) in the circumferential direction.

9. The clutch device (400, 500) according to claim 8, wherein the support element (130) is configured integrally with one of the first friction elements (415).

10. The clutch device (400, 500) according to claim 9, wherein the first friction element (415) is configured as a clutch plate and the axial thickness of the support element (130) is smaller than the axial thickness of the remaining clutch plates.