WO2022258101A1

WO2022258101A1 - Torque transmission device and drive assembly

Info

Publication number: WO2022258101A1
Application number: PCT/DE2022/100352
Authority: WO
Inventors: Shia Jiat CHEE; Florian Vogel; Björn REUTER
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2021-06-11
Filing date: 2022-05-10
Publication date: 2022-12-15

Abstract

The invention relates to a torque transmission device (1) at least comprising: a damping device (2) for damping torsional vibrations; and a torque limiting device (3), which is coupled to the damping device (2), for limiting a torque transmitted via the torque transmission device (1), the damping device and torque limiting device comprising a common axis of rotation (5) extending along an axial direction (4); wherein the damping device (2) has a first input side (6) and a first output side (7); wherein the torque limiting device (3) has a second input side (8) coupled to the first output side (7) and a second output side (11) connected to the second input side (8) via at least one frictional contact (9) of a friction clutch (10); wherein the torque introduced into the torque transmission device (1) via the first input side (6) can be transmitted to the second output side (11) and can thereby be limited to a limit torque; wherein the at least one frictional contact (10) is located inside the damping device (2) in a radial direction (12).

Description

Torque transmission device and a drive arrangement

The invention relates to a torque transmission device and to a drive assembly.

Various drive arrangements are known from the prior art, which have torque transmission devices.

In known drive arrangements, it is required that electrical units of the drive arrangement, in particular, be protected against excessive torque and against sudden changes in torque. Torque peaks of this kind and/or abrupt torque changes occur in particular when a motor vehicle equipped with the drive arrangement, e.g. B. drives on an uneven surface, with individual wheels of the motor vehicle occasionally losing their frictional contact with the ground, or spin or be accelerated strongly.

Known torque transmission devices in drive assemblies are accordingly combined with a torque limiting device in order to fulfill the task of protecting against excessive torque. In addition, torque transmission devices often include torsional vibration dampers to protect connected units against torsional vibrations such. B. torsional vibrations that are generated during operation of connected internal combustion engines.

Torque limiting devices acting by friction are known. In these concepts, friction pairings made from organic linings are typically pressed against steel counter friction discs. The required contact pressure is typically generated by (cup) springs. In principle, these are self-actuated/torque-actuated friction clutches. Such torque limiting devices can be configured as a slipping clutch. Torsional vibration dampers are known, for example, from the field of motor vehicles, in order to equalize rotational irregularities and thus reduce torque shocks and/or noise emissions. A particularly efficient torsional vibration damper is, for example, a pendulum rocker damper, in which at least one intermediate element mounted swingably on at least one energy storage element on at least one rolling body modulates a torque rigidity of the drive train.

An oscillating rocker damper is known from DE 10 2019 121 205 A1.

Furthermore, a rocker damper with a torque limiter unit designed as a slipping clutch has already been designed.

Proceeding from this, the present invention is based on the object of proposing a rocker damper with compact dimensions, which can be used in a, in particular hybrid, drive train of a motor vehicle, in particular in the torque path between the internal combustion engine and the electric motor.

This object is achieved with a torque transmission device according to the features of claim 1 and with a drive arrangement according to the features of claim 10. Further advantageous refinements of the invention are specified in the dependent claims. The features listed individually in the dependent claims can be combined with one another in a technologically meaningful manner and can define further refinements of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, with further preferred refinements of the invention being presented will.

A torque transmission device is proposed, at least comprising a damping device for damping torsional vibrations and a torque limiting device coupled to the damping device for limiting a torque transmitted via the torque transmission device, with a common same axis of rotation. The damping device has a first input side and a first output side. The torque limiting device has a second input side coupled to the first output side and a second output side connected to the second input side via at least one frictional contact of a friction clutch. The torque introduced into the torque transmission device can be transmitted via the first input side to the second output side and can be limited to a limit torque. The at least one frictional contact is arranged in a radial direction within the damping device.

The individual components of the damping device and torque limiting device and their function in a torque transmission device are known in principle.

The torque transmitted via the torque transmission device can be limited to a limit torque via the torque limiting device designed as a friction clutch. When a predefined limit torque is reached, the friction clutch begins to slip, i. H. in the torque transmission device z. B. Torque introduced via the first input side is no longer transmitted to the second output side.

The damping device is in particular a torsional vibration damper, which can even out rotational irregularities and thus reduce torque shocks and/or noise emissions. The torsional vibration damper is designed in particular as a special pendulum rocker damper, in which at least one intermediate element is connected to at least one energy storage element, e.g. B. a spring, mounted on at least one rolling element swingably modulates a torque stiffness of the drive train. In particular, the oscillating rocker damper has a plurality of intermediate elements distributed along a circumferential direction. These can also support each other via energy storage elements. Each intermediate element is at least one rolling element, possibly several rolling elements, oscillatingly mounted, e.g. B. te on the first input side or the first output side. The at least one intermediate element can be inside or outside of a Torque flow be arranged. In principle, pendulum rocker dampers are known.

In particular, the at least one frictional contact is arranged inside the damping device in a radial direction. The components torque-limiting device or friction clutch and damping device can thus be nested and thus arranged at least partially overlapping along the axial direction.

The at least one friction contact comprises the friction surface(s) of the friction clutch, via which the torque to be transmitted can be transmitted. The frictional contact can thus z. B. on a backing plate, a pressure plate, a friction plate or a friction lining.

In particular, only the first input side and first output side components of the damping device are arranged at least partially overlapping with the second input side and second output side components of the torque limiting device along the radial direction. In particular, therefore, all (other) components of the damping device are arranged in the radial direction outside of all (other) components of the torque limiting device or the friction clutch.

Specifically, the first input side has a plurality of first through holes distributed along a circumferential direction, and the second output side has a plurality of second through holes distributed along the circumferential direction. In particular, the first through holes and the second through holes are aligned with each other along the axial direction. In particular, such an arrangement or attachment of connecting elements in or on the first through-holes via the second through-holes is possible, so that z. B. the first te input side can be connected to a crankshaft of an internal combustion engine. In particular, the torque transmission device can be provided as a preassembled assembly that can be connected to a drive unit via the connecting elements.

In particular, the through holes are arranged in the radial direction inside the at least one frictional contact. In particular, the through holes are arranged in the radial direction outside of a hub with which the second output side can be connected in a torque-transmitting manner.

In particular, the friction clutch is a multi-plate clutch with a plurality of outer disks connected to an outer disk carrier and a plurality of inner disks connected to an inner disk carrier, the second output side being designed as an inner disk carrier.

In particular, the outer disks are designed as steel disks and the inner disks as friction linings.

The slats can z. B. are pressed together by a spring with a predetermined contact pressure that defines the limit torque. The slats can z. B. on a opposite to the axial direction stationary arranged counter-plate against the contact pressure.

In particular, the first output side is rotatably connected to the second input side.

In particular, the first output side is connected to the second input side via a plurality of riveted connections and the second input side is designed as the outer disc carrier. The rivets of the riveted joints extend in particular along the axial direction. The first output side and second input side, which are designed as flanges at least in this area, extend in particular exclusively along the circumferential direction and the radial direction. The rivet connections are distributed along the circumferential direction, in particular evenly. The flange on the second inlet side can be used as a counter plate. The rivet connections are arranged in alignment with the friction clutch and/or with the at least one friction contact, in particular along the axial direction.

In particular, the first output side forms the outer disk carrier. In this way, the first output side and the second input side are in particular integrated, ie designed as a common component. In this way, a design of the torque transmission device that is even more compact, at least in relation to the axial direction, can be provided. A counter-plate can also be integrated or performed as an individual part. The counter plate only needs to be designed with regard to the strength required to support the contact pressure.

In particular, the second input side is formed by a plurality of centering bolts, which are distributed along the circumferential direction and are non-rotatably connected to the first output side and form the outer disk carrier. In particular, the torque is transmitted between the first input side and the second output side via the centering bolts. A counter-plate can be integrated with the first output side or designed as an individual part. The counter plate only needs to be designed with regard to the strength required to support the contact pressure.

A drive arrangement is also proposed, comprising a drive unit and the torque transmission device described. An output of the prime mover is coupled to the first input side of the damping device of the torque transfer device for transmitting torque from the prime mover to the torque transfer device.

The second output side can be connected in a torque-proof manner to a hub in particular. The second output side is in particular equipped with a spline for connection to the hub and/or a transmission input shaft or an intermediate shaft, connected to it or formed in one piece with it. A motor vehicle is also proposed, at least comprising the drive arrangement described and a transmission, the transmission being connected to the drive arrangement via the second output side.

The use of indefinite articles (“a”, “an”, “an” and “an”), particularly in the claims and the description reflecting them, is to be understood as such and not as a numeral. Correspondingly introduced terms or components are to be understood in such a way that they are present at least once and in particular can also be present several times.

As a precaution, it should be noted that the numerals used here (“first”, “second”, ... ) primarily (only) serve to distinguish between several similar objects, sizes or processes, i.e. in particular no dependency and/or sequence of these objects , sizes or processes to each other. Should a dependency and/or order be necessary, this is explicitly stated here or it is obvious to the person skilled in the art when studying the specifically described embodiment. If a component can occur more than once ("at least one"), the description of one of these components can apply equally to all or part of the majority of these components, but this is not mandatory.

The invention and the technical environment are explained in more detail below with reference to the accompanying figures. It should be pointed out that the invention should not be limited by the exemplary embodiments given. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and knowledge from the present description. In particular, it should be pointed out that the figures and in particular the size ratios shown are only schematic. Show it:

Fig. 1: a first variant of a torque

Transmission device in a side view in section;

Fig. 2: a second embodiment of a torque

Transmission device in a side view in section; and Fig. 3: a third variant of a torque

Transmission device in a side view in section.

Fig. 1 shows a first embodiment of a torque transmission device 1 in a side view in section. The arrangement of the torque transmission device 1 in a drive assembly 20 is indicated switched. The drive arrangement 20 comprises a drive assembly 21 and the torque transmission device 1. An output 22 of the drive assembly 21 is coupled to the first input side 6 of the damping device 2 of the torque transmission device 1 for the purpose of transmitting a torque from the drive assembly 21 to the torque transmission device 1 The second output side 11 is connected to a hub 23 in a rotationally fixed manner. The second exit side 11 is equipped with a spline for connection to the hub 23 .

The torque transmission device 1 comprises a damping device 2 for damping torsional vibrations and a torque limiting device 3, coupled to the damping device 2, for limiting a torque transmitted via the torque transmission device 1, with a common axis of rotation 5 extending along an axial direction 4. The damping device 2 has a first input side 6 and a first output side 7 . The torque limiting device 3 has a second input side 8 coupled to the first output side 7 and a second output side 11 connected to the second input side 8 via at least one friction contact 9 of a friction clutch 10 . Via the first input side 6, the torque introduced into the torque transmission device 1 can be transmitted to the second output side 11 and can be limited to a limit torque. The min least one frictional contact 9 is arranged in a radial direction 12 within the damping device 2 .

The torque transmitted via the torque transmission device 1 can be limited to a limit torque via the torque limiting device 3 designed as a friction clutch 10 . When a predefined limit torque is reached, the friction clutch 10 begins to slip, ie the torque in the Transmission device 1 z. B. Torque introduced via the first input side 6 is no longer transmitted to the second output side 11 .

The damping device 2 is a torsional vibration damper that can even out rotational irregularities and thus reduce torque shocks and/or noise emissions. The torsional vibration damper is designed as a pendulum rocker damper, in which at least one intermediate element 25 is mounted so that it can swing on at least one rolling body 26 and modulates a torque stiffness of the drive train.

The at least one friction contact 9 is arranged inside the damping device 2 in a radial direction 12 . The components of the torque limiting device 3 or the friction clutch 10 and the damping device 2 can thus be nested and thus arranged at least partially overlapping along the axial direction 4 .

The at least one friction contact 9 comprises the friction surfaces of the friction clutch 10, via which the torque to be transmitted can be transmitted. The frictional contact 9 is therefore present on a counterplate 24 and the (friction) plates 17, 19 or the friction linings.

Only the first input side 6 and first output side 7 components of the damping device 2 are arranged at least partially overlapping with the second input side 8 and second output side 11 components of the torque limiting device 3 along the radial direction 12 . All other components of the damping device 2 are therefore arranged in the radial direction 12 outside of all other components of the torque limiting device 3 or the friction clutch 10 .

The first input side 6 has a plurality of first through holes 14 distributed along a circumferential direction 13 and the second output side 11 has a plurality of second through holes 15 distributed along the circumferential direction 13 .

The first through holes 14 and the second through holes 15 are arranged in alignment with one another along the axial direction 4 . This means that connecting elements can be arranged or fastened in or on the first passage holes 14 on the second through holes 15 possible, so that z. B. the first input side 6 with a crankshaft, the output 22, a combustion engine, the drive unit 21, can be connected. The torque transmission device 1 can be provided as a preassembled assembly that can be connected to a drive unit via the connecting elements.

The through holes 14, 15 are arranged in the radial direction 12 within the at least one frictional contact 9 and outside of the hub 23.

The friction clutch 10 is a multi-plate clutch with a plurality of external disks 17 connected to an outer disk carrier 16 and a plurality of inner disks 19 connected to an inner disk carrier 18 , the second output side 11 being an inner disk carrier 18 .

The slats 17, 19 are pressed together by a spring 27 with a predetermined pressing force that defines the limit torque. The slats 17, 19 are supported by a counterplate 24 that is stationary in relation to the axial direction 4 with respect to the contact pressure.

The first output side 7 is non-rotatably connected to the second input side 8 .

In the first embodiment variant shown, the first output side 7 is connected to the second input side 8 via a plurality of rivet connections 28 and the second input side 8 is designed as the outer disk carrier 16 . The rivets of the rivet connections 28 extend along the axial direction 4. The first output side 7 and second input side 8, designed at least in this area as flanges, extend exclusively along the circumferential direction 13 and the radial direction 12. The rivet connections 28 are along the circumferential direction 13 arranged distributed. The flange of the second input side 8 is designed as a counterplate 24 .

The riveted joints 28 are arranged in alignment with the friction clutch 10 and the at least one friction contact 9 along the axial direction 4 . Fig. 2 shows a second embodiment of a torque transmission device 1 in a side view in section. Reference is made to the statements relating to FIG.

In contrast to the first embodiment variant, the first output side 7 forms the outer disk carrier 16 in the second embodiment variant. This means that the first output side 7 and the second input side 8 are integrated, ie as a common component. In this way, an even more compact design of the torque transmission device 1 can be provided, at least in relation to the axial direction 4 . A counter-plate 24 is designed as a single part.

FIG. 3 shows a third embodiment variant of a torque transmission device 1 in a side view in section. Reference is made to the statements relating to FIGS.

In contrast to the first and second embodiment variant, in the third embodiment variant the second input side 8 is formed by a plurality of centering bolts 29 which are distributed along the circumferential direction 13 and are non-rotatably connected to the first output side 7 and form the outer disk carrier 16. The torque is transmitted between the first input side 6 and the second output side 11 via the centering pin 29. A counter-plate 24 is designed as a single part. The components counterplate 24 , disks 17 , 19 , inner disk carrier 18 and the damping device 2 are arranged centered with respect to the axis of rotation 5 via the centering bolts 29 .

Reference character list

1 torque transmission device

2 damping device

3 Torque Limiting Device

4 axial direction

5 axis of rotation

6 first entry page

7 first home page

8 second entry page

9 frictional contact

10 friction clutch

11 second exit page

12 radial direction

13 circumferential direction

14 first through holes

15 second through holes

16 outer disc carrier

17 outer slat

18 inner disc carrier

19 inner slat

20 drive assembly

21 power unit

22 exit

23 hub

24 counter plate

25 intermediate element

26 rolling elements

27 spring

28 rivet connection

29 centering pin

Claims

patent claims

1. Torque transmission device (1), at least comprising a damping device (2) for damping torsional vibrations and a torque limiting device (3) coupled to the damping device (2) for limiting a torque transmitted via the torque transmission device (1). , having a common axis of rotation (5) extending along an axial direction (4); wherein the damping device (2) has a first input side (6) and a first output side (7); wherein the torque limiting device (3) has a second input side (8) coupled to the first output side (7) and a second output side (11) connected to the second input side (8) via at least one friction contact (9) of a friction clutch (10). having; wherein the torque introduced into the torque transmission device (1) via the first input side (6) can be transmitted to the second output side (11) and can be limited to a limit torque; wherein the at least one frictional contact (10) is arranged in a radial direction (12) within the damping device (2).

2. Torque transmission device (1) according to claim 1, wherein only the components of the first input side (6) and the first output side (7) of the damping device (2) along the radial direction (12) at least partially overlap with the components of the second input side (8) and second output side (11) of the torque limiting device (3) are arranged.

3. Torque transmission device (1) according to one of the preceding claims, wherein the first input side (6) distributes a plurality of first through holes (14) along a circumferential direction (13) and the second output side (11) along the circumferential direction (13 ) distributed a plurality of second through holes (15); wherein the first through holes (14) and the second through holes (15) are aligned with each other along the axial direction (4).

4. Torque transmission device (1) according to claim 3, wherein the through-holes (14, 15) are arranged in the radial direction (12) within the at least egg NEN frictional contact (9).

5. Torque transmission device (1) according to one of the preceding claims, wherein the friction clutch (10) is a multi-plate clutch with a plurality of outer plates (17) connected to an outer plate carrier (16) and a plurality of outer plates (17) connected to an inner plate carrier (18). connected inner disc (19), wherein the second output side (11) is designed as an inner disc carrier (18).

6. Torque transmission device (1) according to claim 5, wherein the first output side (7) with the second input side (8) is rotationally connected.

7. Torque transmission device (1) according to claim 6, wherein the first output side (7) is connected to the second input side (8) via a plurality of riveted connections (28) and the second input side (8) is designed as the outer disk carrier (16). is.

8. Torque transmission device (1) according to claim 6, wherein the first output side (7) forms the outer disk carrier (16) and thus the first output side (7) and the second input side (8) are designed to be integrated.

9. Torque transmission device (1) according to claim 6, wherein the second input side (8) is formed by a plurality of centering bolts (29) which are distributed along a circumferential direction (13) and are non-rotatably connected to the first output side (7). and form the outer disk carrier (16).

10. Drive arrangement (20) comprising a drive unit (21) and a torque transmission device (1) according to one of the preceding claims, wherein an output (22) of the drive unit (21) with the first input side (6) of Damping device (2) of the torque

Transmission device (1) is coupled for the purpose of transmitting a torque element from the drive unit (21) to the torque transmission device (1).