KR20080105091A - Torque transmitting device which permits a radial displacement, and a clutch plate - Google Patents

Abstract

The invention relates to a torque transmitting device having an input part and an output part which in each case can be connected to a rotatable shaft and are coupled in terms of drive by means of at least one intermediate element which permits a radial displacement of the two parts, wherein the intermediate element is coupled by means of at least two radially elastic regions (9, 10), which permit radial displacement, on the one hand to the input part (3) and on the other hand to the output part (4). ® KIPO & WIPO 2009

Description

Torque transmission device and clutch disc that allow radial displacement {TORQUE TRANSMITTING DEVICE WHICH PERMITS A RADIAL DISPLACEMENT, AND A CLUTCH PLATE}

The present invention relates to a torque transmission device having an input and an output, each of which can be connected to a rotating shaft, the input and output being mutually associated with driving through at least one intermediate member allowing radial displacement of the two parts. It is connected.

An example of such a torque transmission device in the form of a clutch disc has been proposed by DE 100 02 830 A1. In the case of the clutch disc, the external tooth of one component meshes with the internal tooth of another component, where there is a small play between the teeth that are engaged with each other to ensure the possibility of some radial displacement. However, upon radial displacement of the two parts, the teeth abut unevenly over the circumference. Also, due to the eccentric rotation between the teeth that are engaged with each other, wear occurs in the teeth due to the relative movements occurring during the rotation.

It is an object of the present invention to provide a stable torque transfer possibility that does not cause wear between two parts that carry some eccentricity and rotate relative to each other. In addition, the parts used to compensate for the amount of eccentricity between the axes of rotation should be able to be manufactured in a very simple and economical way.

According to the invention this object is achieved in the torque transmission device of the type mentioned in the introduction, in which the intermediate member is connected to the input part on the one hand and to the output part on the other hand by at least two radially elastic regions which allow radial displacement. Is achieved.

The radially elastic region may be formed of separately manufactured parts, which are fixedly connected to the input or output on the one hand and to the intermediate member on the other hand. The connections necessary for this can be formed, for example, as rivet connections and / or welded connections. Alternatively, the radially elastic region may be at least partially formed integrally with the intermediate member and / or the input and / or the output. In particular, it is preferred that the elastic regions-when viewed in the circumferential direction of the torque transmission device-are offset from one another by at least approximately 90 ° about the axis of rotation of the torque transmission device. On the one hand the areas connecting the input and the intermediate member and on the other hand the areas connecting the intermediate and the output part are preferably formed or arranged symmetrically with respect to the axis of rotation of the torque transmission device.

According to the present invention, the elastic regions can be disposed between the intermediate member and the output part and between the intermediate member and the input part so that the input part and the output part can be displaced or moved relative to each other in two directions perpendicular to each other. By overlapping the two movable directions, relative movement between the two parts can also occur in the radial direction between the two directions.

In particular, it may be desirable for the elastic region not only to allow radial displacement between the input and output, but also to ensure limited axial movement of the two parts.

The elastic regions may each be formed of sections in the form of bending beams facing at least in the circumferential direction. This section may be formed in the form of an arc. Or it may be formed in a zigzag or wavy form in the circumferential direction over a predetermined angle range. The circumferential range of sections or flexible regions similar to the flexural beams preferably lies within a size of 30 ° to 60 °. Regions that are at least radially elastic can be formed of a plurality of sections of the type described above, similar to a flexural beam, that can extend substantially parallel to one another in the circumferential direction. Sections similar to these flexural beams may be disposed radially adjacent. It may also be desirable for at least two of the adjacent sections similar to the flexural beams to be connected to one another so that a wider connection area is formed, for example for the formation of rivet connections.

Preferably, the intermediate member may be formed of at least one disc shaped part. The disk-like part may have at least two sections lying facing each other in the radial direction, from which sections each resembles an elastic region or a flexural beam, in both circumferential directions. In order to form the disc shaped intermediate member, a plurality of disc shaped parts must be stacked in the axial direction. The multilayer structure of the elastic region allows the stresses occurring in the individual material layers to be reduced. In addition, the elastic force or elastic deformation force of the elastic regions, which ensures a flexible connection between the input and the output, can be improved as a whole.

The at least one disc shaped intermediate member forming the elastic region may have an annular base body, and a radial section or radial arm extending from the base body supports the elastic regions extending in the circumferential direction. The parts forming the disk-shaped elastic regions can simply be manufactured as perforated parts.

Inputs and / or outputs that are connected to the elastic regions as appropriate for operation can be designed in an annular shape. The output and the input have preferably radially extending regions, which are arranged in an offset state with respect to each other so that they can intersect with one another in the radial direction but with the end sections of the elastic regions in the circumferential direction.

Preferably, the torque transmission device can be designed as a clutch disc comprising a friction lining carrier with annular parts. At this time, a radially inwardly facing arm is formed from the part, in which radially elastic regions are fixed. The clutch disc may also include a hub body that supports or forms an outwardly facing arm in the radial direction, wherein the radially elastic regions are fixed to the arm.

The clutch disc formed according to the invention can be used to compensate for an axial offset between the axis of rotation of the crankshaft of the internal combustion engine and the axis of rotation of the electric machine rotor rotatably mounted in the housing of the internal combustion engine. One example of a suitably mounted rotor is known from DE 43 11 697 A1. In this rotor, the hub body of the clutch disc can be fixedly connected with one end of the crankshaft and the friction linings of the friction lining carrier can interact with the clutch which is rotatably connected to the rotor of the electric machine. Such a clutch may be provided, for example, radially inside the rotor, or the rotor may be supported by the housing portion of the clutch.

In the following description of the drawings, further advantages and functional and structural features of the torque transmission device formed in accordance with the invention are described in more detail.

1 is a view showing a torque transmission device formed of a clutch disk.

FIG. 2 is a cross-sectional view taken along the line “AA” of FIG. 1.

3 is an exploded view of the parts forming the clutch disc.

4 is a schematic diagram of a torque transmission system including a friction clutch, in which the present invention may be preferably used.

The torque transmission device shown in FIGS. 1-3 forms a clutch disc 1 designed for use with a friction clutch in a known manner. This clutch disc 1 has friction linings 2 fixed to the friction lining carrier 3. The friction linings 2 can be connected with the friction lining carrier 3 with a so-called lining spring as an intermediate member in a known manner. However, for many uses it may be desirable to have no such lining springs, in which case both friction linings 2 are fixed in relation to one another in axial direction.

The friction lining carrier 3 forms the input of the clutch disc 1 with at least friction linings 2. The output of the clutch disc 1 is formed by a hub body 4, which has a hub 5 and a flange region 6 extending radially outward from the hub. In the embodiment shown, the hub 5 is integrally formed with the flange region. The hub 5 is designed to be mounted on the shaft, where the hub 5 may have an internal tooth that can engage the external tooth of the shaft for a connection suitable for driving. Alternatively, the hub body 4 can be connected in another way with the associated shaft, for example by means of a welded connection, a screwed connection or a connection using a pin. In many applications, simply press-fitting the hub body 4 to the associated shaft may be sufficient to transfer the torque.

As used herein, the meanings of the inputs and outputs are completely independent of the direction of power flow or torque flow that can be transmitted by the clutch disc 1, but only to characterize the relevant parts 3 and 4. It is.

Between the input 3 and the output 4 is provided an intermediate member 7 composed of different individual parts 8.

As can be seen in particular in Fig. 3, the intermediate member 7 consists of four plate-like or disc-shaped parts 8 stacked on each other in the axial direction. In this figure, the disc shaped parts 8 are formed identically. The disc shaped parts 8 have at least radially resilient regions 9, 10, which, in particular, can be seen in the axis of rotation 13 of the torque transmission device 1, as can be seen in FIG. 1. At least about 90 ° in the circumferential direction. In the embodiment shown, each disc shaped part 8 has two elastic regions 9 and 10 facing in the radial direction, respectively. The elastic regions 9, 10 thereby form two groups each comprising at least two elastic regions 9 and 10. In Fig. 1, two elastic regions 9 and 10 facing in the radial direction are also symmetrically arranged with respect to the rotation axis 13.

The elastic regions 9 and 10 are each formed of at least one section 12 or 13 that is circumferential and resembles a flexural beam, which section is at least radially elastic. In the illustrated embodiment the elastic regions 9 and 10 each have six sections 11 and 12 of such a flexural beam shape, and as can be seen in FIG. 1, the radially outermost section and the radially innermost section ( 11 and 12 are formed slightly wider in the radial direction than the elastic sections lying between them. In the illustrated embodiment, the elastic region "9" and the elastic region "10" have the same number of flexure prosthesis sections 11 and 12, which sections may be formed identically. Of course, the elastic regions “9” and “10” may have different numbers of elastic sections 11 and 12, and the section “11” may have a different shape than the section “12”.

In the embodiment shown, the sections 11 and 12 similar to the flexural beams are formed in the form of arcs in the circumferential direction. Of course, the sections 11 and 12 similar to the flexural beams may have other shapes. That is, the elastic sections 11 and 12 in the above-described manner may extend zigzag, wavy or labyrinth in the circumferential direction. Important for shaping is the fact that the formed regions 11 and 12 have at least radial elasticity, which ensures a predetermined axial displacement of the friction lining carrier 3 with respect to the hub body 4. . The resilient regions 9, 10 or sections 11, 12 similar to the flexural beams also allow some axial displacement between the input 3 and the output 4. The elastic regions 9, 10 which ensure the radial displacement of the two parts 3, 4 can be produced in a very simple and inexpensive manner through a drilling process from sheet material.

As can be seen in Fig. 1, two regions 9, 10 adjacent or continuous in the circumferential direction are connected to each other via section " 14 ". Regions of the flexural beam-like sections 11 and 12, distant from this connecting section 14, are likewise connected to each other via radially extending sections 15 or 16.

The connecting section 14 is arranged radially opposite to form a radial wing which extends radially inward to the common annular base body 17.

In the embodiment shown, the radial section 14 and the sections 11 and 12 forming part "8", similar to the flexural beams, are integrally formed. However, each function may be manufactured separately and performed by parts connected to each other.

The annular input or friction lining carrier 3 has two radial protrusions or arms 18 at its inner diameter. The output part 4 has two radial arms 19 at its outer diameter. The radial arm 19 emerges from the flange region 6 of the hub body 4. As can be seen in Figure 1, the arms "19" and "18" radially overlap or intersect, with one arm "18" and "19" disposed adjacent to each other. Both arms " 18 " and " 19 " are designed symmetrically so as to face radially about the axis of rotation 13.

In the embodiment shown, the end regions 15, 16 of the elastic regions 9, 10 or the sections 11, 12 similar to the flexural beams are fixedly connected with the radial arms 19 or 18. This connection is, in the illustrated embodiment, performed using rivet connections 20, 21. There are three rivet connections 20, 21, each provided in a laminated manner.

As can be seen in Figure 2, the radial arm " 18 " is provided axially on one side of the intermediate member 7 formed of the disc shaped part 8, and the arm " 19 " On the other axial side.

The embodiments shown in Figures 1-3 only show possible structural shapes of the present invention. Through deformation, for example, at least some of the resilient regions 9 and / or 10 or sections 11 and / or 12 similar to the flexural beams can be formed integrally with the hub body 4 and / or the annular component 3. have. Sections 11 and / or 12 similar to the elastic regions 9 and / or 10 or flexural beams may be formed, at least in part, of separate parts connected with the parts 4 and / or 3.

For many applications, it may be desirable to have the inner annular base body 17 at least in some parts 8.

As long as the elastic region 9 and / or 10 is formed integrally with at least the input part 3 and / or the output part 4, at least one disc shaped part 8 or an intermediate member 7 formed of the part ) May be omitted entirely. This is because the function of the intermediate member is integrated into part "3" and / or part "4".

With the arrangement according to the invention, the input part 3 can be displaced in two directions perpendicular to each other with respect to the output part 4, and by the superimposition of the two possible directions of movement, which is present between the two directions. It can also be displaced in the radial direction.

Another advantage of the arrangement according to the invention is that the input part 3 and the output part 4 are always pushed back to the relative center position or return.

The arrangement according to the invention makes it possible to compensate for axial offsets that may occur between shafts or between components which are rotatably mounted, which parts on the one hand and the input part 3 on the other hand. It may be rotatably connected to the output 4 or may be connected.

4 schematically shows an application of a clutch disc with the possibility of radial displacement between the input and the output, according to the invention.

4 schematically shows a crankshaft 50 of an internal combustion engine. A clutch disk 52 formed in accordance with the present invention is fixed to the end 51 of the crankshaft 50 facing the transmission side. In the illustrated embodiment, the clutch disc 52 comprises a first lining carrier 53 and a second lining carrier 54 which may be at least slightly axially displaced relative to the first lining carrier. It is formed of a disk. In the illustrated embodiment, the friction clutch assigned to the clutch disc 52 has two pressure plates 55, 56 and two corresponding pressure plates 57, 58. A spring washer or lever member 59 is provided axially between the two pressure plates 55, 56. The friction clutch 60 can be opened and closed via a spring washer or lever member 59. The friction clutch 60 supports the rotor 61 of the electrical device 62, which can be designed radially outward as a starter generator and / or drive motor. As long as the electric device 62 can be driven as a motor, hybrid driving of an automobile is also possible. The clutch 60 or the rotor 61 is not supported by the crankshaft 50 but is preferably supported by a non-rotable component formed of a housing 63 of the internal combustion engine or of a component fixedly connected to the housing. The bearing 64 necessary for this is schematically illustrated. Preferably, the stator 65 may also be fixed to the housing 63 of the internal combustion engine. By assembling the rotor 61 and the stator 65, a small play may be provided between the two parts 61 and 65. As a result, there is also the possibility that the stator can be accurately centered on the rotor 61 during assembly of the stator 65.

According to one variant, the rotor 61 and the stator 65 may be supported or assembled on the transmission side. In this case, the assembly may be carried out directly on the transmission housing or inside the transmission housing which is screwed into the housing of the internal combustion engine to receive the friction clutch (es).

Due to the assembly of the friction clutch 60 or the rotor 61 described above, fine eccentricity may appear between the rotational axis of the crankshaft 50 and the rotational axis of the rotor 61. Such eccentricity may lead to undesirable radial forces on the crankshaft on the one hand and on the bearing 64 on the other hand if compensation according to the invention is not carried out. Such radial forces are particularly dangerous when the internal combustion engine is driven using an electrical device 62 driven as a starter. The reason is that no oil film is yet formed in the sliding bearing since the end bearing of the crankshaft 50 is still in a mixed friction state when the start of the internal combustion engine starts. Thus, it can be expected that excessively high wear of the end bearings of the crankshaft occurs, in particular, as the number of start-up processes increases during hybrid drive.

<Reference list>

1: clutch disc

2: friction lining

3: friction lining carrier

4: herb body

5: hub

6: flange area

7: middle member

8: parts

9: elastic area

10: elastic area

11: Section similar to flexural beam

12: section similar to flexural beams

13: axis of rotation

14: connection section

15: radially extending section

16: radially extending section

17: annular base body

18: Arm

19: Arm

20: rivet connection

21: rivet connection

50: crankshaft

51: end portion of the crankshaft toward the transmission side

52: clutch disc

53: lining carrier

54: lining carrier

55: pressure plate

56: pressure plate

57: corresponding pressure plate

58: corresponding pressure plate

59: lever member

60: friction clutch

61: rotor

62: electrical appliances

63: housing

64: bearing

65: stator

Claims (20)

A torque transmission device having an input and an output, each of which may be connected to a rotating shaft, the input and output being torque-connected to be suitable for driving through at least one intermediate member allowing radial displacement of the two components. In the apparatus, The intermediate member is characterized in that it is connected to the input part 3 on the one hand and to the output part 4 on the other by at least two radially elastic regions 9, 10 which allow radial displacement. Delivery device. 2. The torque transmission device as claimed in claim 1, wherein the elastic regions are arranged at offset from each other by at least approximately 90 ° about the axis of rotation of the torque transmission device. 3. The elastic region 9, 10 according to claim 1, characterized in that the elastic regions 9, 10 form two groups, each group comprising at least two elastic regions arranged to face in the radial direction. Torque transmission device. 4. The torque transmission device as claimed in claim 3, characterized in that the radially facing regions are arranged symmetrically with respect to the rotation axis (13) of the torque transmission device (1). 5. The torque transmission device as claimed in claim 1, wherein the elastic regions 9, 10 are each formed at least in sections 11, 12 which are circumferential and resemble flexural beams. 6. . 6. The torque transmission device according to claim 5, characterized in that the radially elastic regions (9, 10) are each formed of a plurality of sections (11, 12) similar to the flexural beams. 7. The torque transmission device according to claim 6, characterized in that the sections (11, 12) similar to the flexural beams are arranged radially adjacent. 8. The torque transmission device as claimed in claim 5, wherein the ends of regions similar to the flexural beams are connected to one another. 9. 9. The torque transmission device as claimed in claim 1, wherein the radially elastic regions (9, 10) are integrally formed with at least one intermediate member (8). 10. 10. The torque transmission device as claimed in claim 1, wherein the intermediate member is formed in the form of a disc. 11. The disk-shaped intermediate member (8) according to claim 10, characterized in that it has at least two radial sections (14) lying facing each other in the radial direction, from which the elastic regions extend in both circumferential directions, respectively. Torque transmission device. 12. Torque transmission device according to claim 10 or 11, characterized in that the radial sections (14) lead to an annular base body (17) connecting them to each other. 13. The torque transmission device as claimed in any one of claims 10 to 12, characterized in that a plurality of disc shaped intermediate members (8) are laminated in the axial direction. The torque transmission device according to any one of claims 1 to 13, wherein the input unit and the output unit are formed in an annular shape. 15. The torque transmission device as claimed in any one of claims 1 to 14, wherein the output and the input have radially extending regions 18, 19, in which elastic regions are fixed. . 16. Torque transmitting device according to claim 15, characterized in that the radial regions (18, 19) intersect radially. 17. The method according to any one of the preceding claims, wherein one of the components formed by the input (3) and the output (4) is a friction lining carrier of the automobile clutch disc, and the other is the hub body (4). Torque transmission device, characterized in that forming. 18. The friction lining carrier according to claim 17, wherein the friction lining carrier comprises an annular component (3), from which the radially inwardly directed arm (18) is formed, wherein the arm has a radially elastic region (9). Torque transmission device, characterized in that fixed. 18. Torque transmitting device according to claim 17, characterized in that the hub body (4) comprises an arm (19) facing outward in the radial direction, wherein a radially elastic region (9) is fixed to the arm. . 20. The clutch disc according to any one of the preceding claims, wherein the torque transmission device is together with a hub body (4) and a lining carrier disc (3) suitably connected to drive through at least one intermediate member (8). The hub body 4 may be fixedly connected to the drive shaft of the engine, and the friction lining 2 supported by the lining carrier 3 is mutually connected to the clutch rotatably connected to the rotor of the electric machine. And the rotor is mounted concentrically with the drive shaft of the engine in a housing of the engine or in a transmission housing that can be connected to the engine housing.

Images