DE102016218670A1 - Coupling arrangement for coupling a torsional vibration damper - Google Patents

Abstract

It is a coupling arrangement (24) for coupling a torsional vibration damper (10) provided with a projecting into a receiving channel (18) output member (14), wherein the output member (14) has a toothing (26) for forming a spline, one at an axial first inside (20) of the receiving channel (18) vulnerable first flange (36), one on a for the first axial inside (20) facing the second axial inside (22) of the receiving channel (18) vulnerable second flange (38), one to a first Axialseite of the output part (14) facing first clamping disc (28), pointing to a second axial side of the output part (14) second clamping disc (30), wherein the first clamping disc (28) and / or the second clamping disc (30) into a tooth space Having the toothing (26) of the output part (14) projecting cam lug (32), and one on the output part (14), the first clamping disc (28) and the second Clamping disc (30) vulnerable tensioning spring (34) for eliminating a backlash of the connector by a relative rotation of the driver lug (32) to the output part (14), wherein the first clamping disc (28) and the second clamping disc (30) viewed in the axial direction partially from the first flange ring (36) and the second flange ring (38) are covered. This allows a torsional vibration damper with a small radial space requirement.

Description

The invention relates to a coupling arrangement with the aid of which a torsional vibration damper can be coupled to a drive train of a motor vehicle.

Out WO 2012/031582 A1 a torsional vibration damper in the form of a dual mass flywheel for a drive train of a motor vehicle is known in which an input part for introducing a torque forms a receiving channel for receiving a bow spring. In the receiving channel protrudes an approach of an output part, so that the bow spring can engage both the input part and on the output part to transmit the torque. Radially within the bow spring, a friction device is provided with two flange rings, wherein the flange rings can limit the receiving channel radially inwardly and rubbing slidably on the receiving channel, thereby increasing the damping ratio of the formed by the torsional vibration damper spring-damper system. The output part has radially inwardly of the friction device on an internal toothing to connect via a spline a friction clutch rotatably. In order to eliminate a backlash of the spline, a bracing arrangement is provided radially within the friction device, in which two bracing plates can be rotated by means of a bracing spring relative to the output part. As a result, a driving projection of one of the bracing disks projecting into a tooth space of the toothing can press a tooth of a toothed component of a component following in the direction of force flow against the tooth of the toothing.

There is a constant need to reduce the radial space requirement of torsional vibration dampers.

It is the object of the invention to show measures that allow a torsional vibration damper with a small radial space requirement.

The object is achieved according to the invention by a coupling arrangement having the features of claim 1. Preferred embodiments of the invention are specified in the subclaims and the following description, which individually or in combination may represent an aspect of the invention.

According to the invention, a coupling arrangement for coupling a torsional vibration damper, in particular two-mass flywheel, to a drive train of a motor vehicle, provided with a projecting into a receiving channel for receiving a, designed in particular as a bow spring energy storage element protruding output part for discharging a torque of the torsional vibration damper, wherein the output part a toothing for training a spline, in particular with a coupling unit for coupling a drive shaft of an automotive engine with at least one transmission input shaft of a motor vehicle transmission having a vulnerable to an axial first inside of the receiving channel first flange for partially radial boundary of the receiving channel, one on the axial first inside facing second axial Inside the receiving channel vulnerable second flange for partially radial boundary of the receiving channel, one to a The first clamping disc and / or the second clamping disc has a projecting into a tooth space of the teeth of the output part cam lug, and one on the output part, the first clamping disc and the second clamping disc vulnerable tensioning spring for eliminating a backlash of the connector by a relative rotation of the driving lug to the output part, wherein the first clamping disc and the second clamping disc in the axial direction are partially covered by the first flange and the second flange.

The input part can form a receiving channel for the energy storage element, in which the energy storage element can be arranged. The receiving channel in particular forms a radially outer wall, against which the energy storage element can rest under the influence of centrifugal force. The receiving channel can be closed by the first flange ring and the second flange ring. In particular, the first flange ring and the second flange ring for this purpose can be designed to be displaceable relative to one another in the axial direction and are preferably pressed with a spring force against the axial inner sides of the receiving channel facing one another. The first flange ring and the second flange ring may thereby be part of a friction device, thereby increasing the damping ratio of the spring-damper system formed by the torsional vibration damper. The first flange ring and the second flange ring preferably form a labyrinth seal in the radial direction. For example, leakage of grease from the receiving channel can be prevented by the first flange ring and the second flange ring. The bracing disks can in this case be arranged in the axial direction, in particular between the flange rings, so that the bracing disks extend into a radius region covered from the flange rings from radially inward can protrude. The positioning of the bracing plates and the bracing spring can be displaced radially outwards, so that the teeth of the output part can be displaced radially outward, whereby radial space can be saved. At the same time, this allows the toothing of the output part to be displaced to a larger radius, which makes it possible to transmit a correspondingly greater torque without having to accept a significant increased surface pressure of the toothing. For example, this can be increased by the increased nominal radius of the teeth, the number of teeth of the teeth. Due to the extent of the Verspannscheiben in a radius range of the flange, the Verspannscheiben, the tensioning spring and the teeth can be moved radially outward, so that a torsional vibration damper is made possible with a small radial space requirement, which can transmit an increased torque.

The torsional vibration damper may be configured, for example, as a dual-mass flywheel whose input part can be attached as primary mass directly or indirectly to a drive shaft of an automotive engine and can be connected via the output part as a secondary mass with a clutch unit for coupling a drive shaft of an automotive engine with at least one transmission input shaft. The torsional vibration damper can also be designed as a disk inner damper, for example, as part of a clutch disc of a clutch unit for coupling a drive shaft of an automotive engine with at least one transmission input shaft. In the train operation of the motor vehicle engine, a torque can be introduced via the input part into the torsional vibration damper and discharged via the output part. In a coasting operation of the motor vehicle engine, a torque can be introduced via the output part into the torsional vibration damper and discharged via the input part. In particular, the input part and / or the output part may optionally abut against the energy storage element over a designated clearance angle in the circumferential direction in order to be able to transmit the torque via the energy storage element between the input part and the output part. The relative rotatability of the output part to the input part may be limited by the compressibility of the energy storage element.

The entrainment approach of the clamping plate may preferably replace an otherwise provided tooth of the toothing of the output part. During assembly, a subsequent component, for example a clutch unit, can be connected essentially without power via the splines with sufficient backlash. For this purpose, the tensioning spring can be slightly compressed during assembly and preferably kept in a prestressed state. After assembly, especially during initial operation of the drive train, the tension spring, preferably automatically, can be relaxed until the driver lug pushes a tooth inserted in the toothing of a corresponding toothing of the spline against a subsequent tooth, whereby a backlash and possible rattling noises of the spline can be avoided can. The inserted into the toothing of the output part tooth can thereby be braced with the help of the corresponding clamping disc (s) substantially without play in the circumferential direction in the toothing. The output part is arranged between the first clamping disk and the second clamping disk, so that the one axial side of the output part faces the first clamping disk and facing away from the first axial side second axial side of the output part of the second clamping disk.

In particular, the respective flange ring is made of a plastic material having a lower coefficient of friction with the associated inner side of the receiving channel compared to a steel / steel frictional contact, so that substantially exclusively a relative rotation of the entire coupling arrangement takes place to the receiving channel. Relative rotation within the coupling arrangement in the clamped state of the spline can be avoided. As a result, the deliberate frictional effect of the coupling arrangement depends essentially only on the slipping relative rotation of the flange rings on the associated inner sides of the receiving channel.

Preferably, the first clamping disc is connected to the second clamping disc via a bolt. In particular, the bolt can strike in the circumferential direction on the output part, so that a maximum relative rotatability of the Verspannscheiben can be limited to the output part by the bolt. As a result, only a small rotation of the Verspannscheiben relative to the output part is required in order to produce the spline with another component can. Additionally or alternatively, the first clamping disk and / or the second clamping disk in the circumferential direction of the first flange ring and / or the second flange ring abut.

Particularly preferably, the bolt can be abutted in the circumferential direction on the first flange ring and / or the second flange ring. The bolt can act as a driver for the flange rings. This can ensure that in the clamped state of the connector, the flange rings at the same speed as the Turning the output part. Relative rotations within the coupling arrangement can be avoided.

In particular, a first spring element acting on the first flange ring and the first bracing disk and / or a second spring element acting on the second flange ring and the second bracing disk are provided. The damping element of the oscillatory spring-damper system formed by the torsional vibration damper can be deliberately increased by the spring element in order, for example, to reduce resonance effects. The damping can be achieved by the friction of the flange rings on the corresponding inner sides of the receiving channel. The amount of friction can be suitably adjusted by the provided by the spring element applied normal force and the contact surface on the friction partner in order to achieve a desired damping effect can.

Preferably, the first spring element and / or the second spring element is designed as a plate spring. The diaphragm spring has a comparatively small axial extent. The axial space requirement can be kept low. In particular, only one designed as a plate spring spring element is provided. In this case, the clamping plate positioned farther away from the spring element can be pressed directly against the associated flange ring by the spring force applied by the plate spring, without the need for a further spring element.

Particularly preferably, the first spring element contacts the first clamping disk and / or the second spring element directly contacts the second clamping disk. In this case, the knowledge is exploited that the Verspannscheiben rotate after the elimination of the backlash substantially rotationally fixed to the output part and thus have the substantially same speed as the output part. Direct contact of the spring element with the output part can thereby be avoided, so that it is not necessary to provide a window in the clamping plate provided between the spring element and the output part in order to allow direct contact of the spring element on the output part. Instead, the spring element to the output part contactless attack directly on the clamping plate. The structure can be kept simple and inexpensive.

In particular, the first spring element directly contacts the first flange ring and / or the second spring element directly contacts the second flange ring. An interposed between the flange and the spring element component can be avoided.

Preferably, the first flange ring and / or the second flange has a maximum radial extent .DELTA.r, wherein a radially outer edge of the tensioning spring at standstill has a distance d to a minimum radially inner edge of the first flange ring and / or the second flange ring, wherein -0 , 25 ≤ d / Δr ≤ 1.00, in particular 0.00 ≤ d / Δr ≤ 0.50, preferably 0.10 ≤ d / Δr ≤ 0.30 and more preferably 0.20 ≤ d / Δr ≤ 0.25 applies. The tensioning spring can thereby be displaced very far, in particular radially outward, onto the flange rings without impairing the operation of the flange rings. A negative value of, for example, -0.25 ≦ d / Δr <0.00 means that the bracing spring can even protrude slightly between the flange rings and is partially covered by the flange rings in the axial direction.

Particularly preferably, the first clamping disk and / or the second clamping disk has a maximum radial extent .DELTA.R, wherein a radial portion A of the maximum radial extent .DELTA.R is covered by the first flange ring and the second flange ring in the axial direction, where 0.00 <A / ΔR ≦ 0.60, in particular 0.15 ≦ A / ΔR ≦ 0.50, preferably 0.25 ≦ A / ΔR ≦ 0.45, and more preferably 0.35 ≦ A / ΔR ≦ 0.40. The bracing discs can thereby be moved to the flange rings very far, in particular radially outward, without adversely affecting the operation of the flange rings.

In particular, the bracing spring can be locked in a mounting position by a locking device in a prestressed state, wherein in particular the locking device can be released by a relative rotation of the output part to the input part. The locking device may be closed during assembly, so that substantially powerless by an axial relative movement, the connector can be formed. After assembly, the locking device can be solved to clamp the connector. A suitable locking device is in particular by the in WO 2012/031582 specified locking options, the content of which is incorporated herein by reference as part of the invention.

Particularly preferably, the first clamping disc and / or the second clamping disc retains the tensioning spring in the axial direction. The tensioning spring can thereby be prevented from axially falling out by the clamping disk.

In particular, the output part and / or the first clamping disk and / or the second clamping disk has a window for at least partially receiving the tensioning spring. The As a result, the tension spring can easily abut against the output part within the window of the output part in the circumferential direction in order to transmit a torque. In addition, the tensioning spring can be relatively rotated within the circumferentially correspondingly long executed window of the clamping plate, without taking the clamping disc. As a result, the clamping disk need not be shaped in the axial direction past the tensioning spring, so that a small installation space in the axial direction is made possible.

The invention further relates to a torsional vibration damper, in particular two-mass flywheel or disc inner damper, for damping rotational irregularities in a drive train of a motor vehicle, with an input part for introducing a torque, wherein the input part forms a receiving channel for receiving an energy storage element, in particular designed as a bow spring, and a partial inserted into the receiving channel coupling arrangement, which may be as described above and further educated. Due to the extension of the Verspannscheiben in a radius range of the flange of the coupling arrangement, the Verspannscheiben, the tensioning spring and the toothing can be displaced radially outward, so that a torsional vibration damper is made possible with a small radial space requirement, which can transmit an increased torque.

The invention further relates to a torsional vibration arrangement for damping rotational irregularities in a drive train of a motor vehicle with a coupled with a motor shaft of an automotive engine torsional vibration damper, as described above and further educated, and a non-rotatably coupled via the teeth of the output part coupling unit for coupling the drive shaft at least one transmission input shaft of a motor vehicle transmission. Due to the extension of the bracing disks in a radius range of the flange rings of the coupling arrangement of the torsional vibration damper, the bracing disks, the bracing spring and the teeth can be displaced radially outward, so that a torsional vibration arrangement is made possible, which can transmit an increased torque.

The invention will now be described by way of example with reference to the accompanying drawings with reference to preferred embodiments, wherein the features shown below, both individually and in combination may represent an aspect of the invention. Show it:

1 FIG. 1 is a schematic sectional view of a torsional vibration damper, FIG.

2 : A schematic sectional view of a coupling arrangement of the torsional vibration damper 1 and

3 : A schematic sectional view of the coupling arrangement 2 along a circumferentially offset cutting plane.

The in 1 illustrated torsional vibration damper 10 is as a dual mass flywheel with an acting as a primary mass input part 12 and an output part acting as secondary mass 14 , The entrance part 12 can be directly or indirectly connected to a motor shaft of an automotive engine. The entrance part 12 can in the circumferential direction of a designed as a compression spring, in particular bow spring, energy storage element 16 in turn, in the circumferential direction of the relative to the input part 12 limited rotatable output part 14 can strike that over the entrance section 12 introduced torque to the output part 14 to transmit torsional vibration damped. The energy storage element 16 is in one of the entrance part 12 trained receiving channel 18 arranged. The receiving channel 18 in this case has in particular in a radius range of the starting part 14 a first inner side pointing essentially in the axial direction and a second inner side pointing in the opposite axial direction 22 on.

The starting part 14 is also part of a coupling arrangement 24 , with the aid of which a following in the direction of force flow component, in particular a clutch unit for coupling a drive shaft of a motor vehicle engine with at least one transmission input shaft of a motor vehicle transmission, can be connected. The coupling arrangement 24 can during a relative rotation of the input part 12 to the starting part 14 in the manner of a friction device on the insides 20 . 22 of the receiving channel 18 Slip slipping and thereby provide a conscious friction to increase a damper portion of the torsional vibration damper.

In the 2 and 3 illustrated coupling arrangement 24 has the starting part 14 on, which is designed as an internal toothing gearing 26 for a spline. To eliminate a backlash in the spline after installation are a first clamping disc 28 and one with the first clamping disc 28 via a bolt rotatably connected second clamping disc 30 intended. The second clamping disc 30 has one in a tooth space of the toothing 26 protruding driver approach 32 on. If at a first start of the motor vehicle, the input part 12 relative to the starting part 14 is twisted, can be a locking of a prestressed tension spring 34 automatically resolved become. This allows the at the output part 14 and at the clamping plates 28 . 30 attacking tension spring 34 the clamping plates 28 . 30 as far as relative to the Ausginsgteil 14 twisting until one in the toothing 26 inserted tooth between the driver lug 32 and a subsequent tooth 28 can be jammed without a backlash.

The clamping plates 28 . 30 and / or the clamping plates 28 . 30 interconnecting bolt can in the circumferential direction of a first flange 36 and a second flange ring 38 attacks. This allows the flange rings 36 . 38 be taken with a positive fit. In addition, the flange rings can 36 . 38 partially overlap in the circumferential direction, so that the first flange 36 on the second flange ring 38 strike and take along in the circumferential direction or vice versa. As a result, it is basically sufficient if the first clamping disc 28 and / or the second clamping disc 30 and / or the bolt only on the first flange ring 36 or only on the second flange ring 38 can strike in the circumferential direction. At a relative rotation of the output part 14 to the entrance section 12 can be the first flange ring 36 slipping on the first inside 20 of the receiving channel 18 and the second flange ring 38 slipping on the second inside 22 of the receiving channel 18 slide off and provide a defined by the friction taking place attenuation. The particular made of a plastic flange rings 36 . 38 are designed to be relatively movable in the axial direction and can by a designed as a plate spring first spring element 40 away from each other against the insides 20 . 22 be pressed. The only intended for this first spring element 40 This can be done directly on the first flange ring 36 and the first clamping disc 28 issue.

The clamping plates 28 . 30 partially extend between the first flange ring 36 and the second flange ring 38 , so that a proportional radius area A of the clamping plates 28 . 30 from the flange rings 36 . 38 is covered. The flange rings 36 . 38 have a radial extent .DELTA.r, which may coincide with the covered portion A. The clamping plates 28 . 30 in this case have a radial extent .DELTA.R. This allows the tension spring 34 so far moved radially outward that the tensioning spring 34 only by a very small radial distance d to the flange rings 36 . 38 is spaced radially inward so that radial space within the flange rings 36 . 38 is saved and the gearing 26 may have a particularly large nominal diameter.

LIST OF REFERENCE NUMBERS

10

 torsional vibration dampers

12

 introductory

14

 output portion

16

 Energy storage element

18

 receiving channel

20

 first inside

22

 second inside

24

 coupling arrangement

26

 gearing

28

 first clamping disc

30

 second clamping disc

32

 drive dog

34

 Verspannfeder

36

 first flange ring

38

 second flange ring

40

 first spring element

A

 proportion of

d

 distance

.delta..sub.R

 radial extension flange rings

.DELTA.R

 radial extension of clamping plate

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• WO 2012/031582 A1 [0002]
• WO 2012/031582 [0019]

Claims (10)

Coupling arrangement for coupling a torsional vibration damper ( 10 ), in particular a dual-mass flywheel, to a drive train of a motor vehicle, with a vehicle in a receiving channel ( 18 ) for receiving a, in particular designed as a bow spring, energy storage element ( 16 ) projecting outgoing part ( 14 ) for deriving a torque of the torsional vibration damper ( 10 ), the output part ( 14 ) a gearing ( 26 ) for forming a spline, in particular with a coupling unit for coupling a drive shaft of a motor vehicle engine with at least one transmission input shaft of a motor vehicle transmission, one at an axial first inside ( 20 ) of the receiving channel ( 18 ) vulnerable first flange ring ( 36 ) for the partial radial boundary of the receiving channel ( 18 ), one at an axial to the first inside ( 20 ) facing the second axial inside ( 22 ) of the receiving channel ( 18 ) vulnerable second flange ( 38 ) for the partial radial boundary of the receiving channel ( 18 ), one to a first axial side of the output part ( 14 ) pointing first clamping plate ( 28 ), one to a second axial side of the output part ( 14 ) facing second clamping disc ( 30 ), wherein the first clamping disc ( 28 ) and / or the second clamping disc ( 30 ) one in a tooth space of the toothing ( 26 ) of the initial part ( 14 ) projecting driver approach ( 32 ), and one at the output part ( 14 ), the first clamping disc ( 28 ) and the second clamping disc ( 30 ) vulnerable tensioning spring ( 34 ) for eliminating a backlash of the connector by a relative rotation of the driver lug ( 32 ) to the starting part ( 14 ), wherein the first clamping disc ( 28 ) and the second clamping disc ( 30 ) viewed in the axial direction partially from the first flange ( 36 ) and the second flange ring ( 38 ) are covered. Coupling arrangement according to claim 1, characterized in that the first clamping disc ( 28 ) with the second clamping disk ( 30 ) is connected via a bolt, wherein the bolt in the circumferential direction on the first flange ( 36 ) and / or the second flange ring ( 38 ) is applicable. Coupling arrangement according to claim 1 or 2, characterized in that a on the first flange ( 36 ) and the first clamping disc ( 28 ) engaging first spring element ( 40 ) and / or on the second flange ring ( 38 ) and the second clamping disc ( 30 ) engaging second spring element is provided. Coupling arrangement according to claim 3, characterized in that the first spring element ( 40 ) the first clamping disc ( 28 ) and / or the second spring element, the second clamping disc ( 30 ) contacted directly. Coupling arrangement according to claim 3 or 4, characterized in that the first spring element ( 40 ) the first flange ring ( 36 ) and / or the second spring element, the second flange ( 38 ) contacted directly. Coupling arrangement according to one of claims 1 to 5, characterized in that the first flange ring ( 36 ) and / or the second flange ring ( 38 ) has a maximum radial extent Δr, wherein a radially outer edge of the tensioning spring ( 34 ) at standstill a distance d to a minimum radially inner edge of the first flange ring ( 36 ) and / or the second flange ring ( 38 ), wherein -0.25 ≦ d / Δr ≦ 1.00, in particular 0.00 ≦ d / Δr ≦ 0.50, preferably 0.10 ≦ d / Δr ≦ 0.30 and particularly preferably 0.20 ≦ d / Δr ≤ 0.25. Coupling arrangement according to one of claims 1 to 6, characterized in that the first clamping disc ( 28 ) and / or the second clamping disc ( 30 ) has a maximum radial extent .DELTA.R, wherein a radial portion A of the maximum radial extent .DELTA.R of the first flange ( 36 ) and the second flange ring ( 38 ) is covered in the axial direction, where 0.00 <A / ΔR ≦ 0.60, in particular 0.15 ≦ A / ΔR ≦ 0.50, preferably 0.25 ≦ A / ΔR ≦ 0.45 and particularly preferably 0, 35 ≤ A / ΔR ≤ 0.40. Coupling arrangement according to one of claims 1 to 7, characterized in that the tensioning spring ( 34 ) can be locked in a mounting position of a locking device in a prestressed state, wherein in particular the locking device by a relative rotation of the output part ( 14 ) to the entrance part ( 12 ) is solvable. Torsional vibration damper, in particular two-mass flywheel or disc inner damper, for damping rotational irregularities in a drive train of a motor vehicle, having an input part ( 12 ) for introducing a torque, wherein the input part ( 12 ) a receiving channel ( 18 ) for receiving a, in particular designed as a bow spring, energy storage element ( 16 ) and partially into the receiving channel ( 18 ) used coupling arrangement ( 24 ) according to one of claims 1 to 8. Torsional vibration arrangement for damping rotational irregularities in a drive train of a motor vehicle with a coupled to a motor shaft of a motor vehicle engine Torsional vibration damper ( 10 ) according to claim 9 and one on the toothing ( 26 ) of the initial part ( 14 ) rotatably coupled coupling unit for coupling the drive shaft with at least one transmission input shaft of a motor vehicle transmission.

Images