CLUTCH DISK COMPRISING A CENTRIFUGAL PENDULUM

Abstract

The invention relates to clutch disc comprising a torsional vibration damper which has an inlet part and an outlet part and a spring device operatively arranged in the peripheral direction between the input part and the output part, wherein the spring device is formed from the first and second spring elements connected behind one another and separated by an intermediate flange, and a centrifugal pendulum which has a pendulum mass carrier arranged about an axis of rotation of the clutch disc and pendulum masses accommodated on same on pendulum paths for oscillation and arranged in a distributed manner over the periphery. In order to improve the insulation effect of the torsional vibration damper and the centrifugal pendulum and/or better adjust same to the required application, the pendulum mass carrier is coupled for conjoint rotation with the intermediate flange and centrally accommodated on the output part.

Claims

1. A clutch disk having a torsional vibration damper having an input portion and an output portion and a resilient device which is effectively arranged in a circumferential direction between the input portion and the output portion, wherein the resilient device is formed by first and second resilient elements which are connected one behind the other and which are separated by an intermediate flange, and having a centrifugal pendulum having a pendulum mass carrier which is arranged around a rotation axis of the clutch disk and pendulum masses which are received in a manner capable of oscillating on pendulum paths and which are arranged circumferentially, wherein the pendulum mass carrier is connected in a rotationally secure manner to the intermediate flange and received on the output portion in a centered manner.

2. The clutch disk as claimed in claim 1, wherein the resilient elements are received between two output-side flange portions which are received with circumferential backlash on an output-side hub and which are acted on alternately by the input portion in accordance with a torque direction, wherein the intermediate flange is received between the first and second resilient elements.

3. The clutch disk as claimed in claim 2, wherein the pendulum mass carrier is received on the hub so as to be rotatable in a limited manner and centered thereon.

4. The clutch disk as claimed in claim 2, wherein a friction sleeve is arranged between the pendulum mass carrier and the hub.

5. The clutch disk as claimed in claim 1, wherein the torsional vibration damper and the centrifugal pendulum are arranged axially beside each other.

6. The clutch disk as claimed in claim 1, wherein the pendulum mass carrier is connected to the intermediate flange via axially orientated spacer bolts which engage through a flange portion of the input portion which receives friction linings.

7. The clutch disk as claimed in claim 1, wherein the pendulum mass carrier is constructed as a pendulum flange having pendulum masses arranged at both sides.

8. The clutch disk as claimed in claim 1, wherein the pendulum mass carrier is formed by two lateral portions which are arranged axially beside each other and which are axially spaced apart at a pendulum portion and which receive the pendulum masses between them.

9. The clutch disk as claimed in claim 1, wherein the pendulum masses are supported via radially effective resilient elements with respect to the pendulum mass carrier.

10. The clutch disk as claimed in claim 1, wherein the first and second resilient elements have the same rigidity.

11. A clutch disk comprising: a torsional vibration damper having an input portion, an output portion, and first and second resilient elements arranged circumferentially about a rotation axis, located axially between the input portion and the output portion, and indirectly connected to each other via an intermediate flange; and a centrifugal pendulum having a pendulum mass carrier configured to move about the rotation axis, and pendulum masses coupled to the pendulum mass and configured to oscillate in a circumferential direction relative to the pendulum mass carrier, wherein the pendulum mass carrier is rotationally fixed to the intermediate flange.

12. The clutch disk of claim 11, wherein the input portion includes two axially spaced-apart flange portions secured to one another.

13. The clutch disk of claim 12, wherein the spaced-apart flange portions are connected via spacer bolts extending through apertures in the intermediate flange.

14. The clutch disk of claim 11, further comprising a hub extending along the rotation axis, wherein the output portion includes two flange portions spaced apart from one another and attached to the center hub via a tooth arrangement.

15. The clutch disk of claim 14, wherein the pendulum mass carrier is rotatably connected to the hub.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The clutch disk is explained in greater detail with reference to the embodiment which is illustrated in FIGS. 1 to 4, in which:

[0021] FIG. 1 is a cross-section through an embodiment of the proposed clutch disk,

[0022] FIG. 2 is a front view of the clutch disk of FIG. 1 with some components removed or hidden for clarity,

[0023] FIG. 3 is an exploded view of the clutch disk of FIGS. 1 and 2, and

[0024] FIG. 4 is a schematic circuit diagram of the proposed clutch disk.

DETAILED DESCRIPTION OF THE DRAWINGS

[0025] FIG. 1 is a cross-section of the clutch disk 1 which is arranged around the rotation axis d and which has the input portion 2 and the output portion 3 and the torsional vibration damper 4 which is arranged therebetween and the centrifugal pendulum 5.

[0026] The input portion 2 is formed by the two axially spaced-apart flange portions 6, 7. In this case, the flange portion 6 acts as a lining carrier and receives radially outwardly the friction linings 8. The flange portions 6, 7 are securely connected to each other via the spacer bolts 9.

[0027] The output portion 3 is formed by the two flange portions 10, 11 which are connected to the hub 12 via the tooth arrangement 13 so as to form a circumferential backlash 14. The intermediate flange 15 is arranged so as to float axially between the two flange portions 10, 11.

[0028] The resilient device 16 is formed by the first resilient elements 17 and the second resilient elements 18 which are received between one of the flange portions 10, 11 and the intermediate flange 15 and which are acted on thereby in a circumferential direction. In the embodiment illustrated here, the resilient elements 17, 18 are formed by the helical pressure springs 19, 20 which are nested one in the other.

[0029] The output-side flange portions 10, 11 are acted on alternately in accordance with the torque which is introduced into the input portion 2 or the output portion 3 and transmit the applied torque via the resilient device 16 with the intermediate flange 15 to the output portion 3 or the input portion 2. In the tensile phase, the torque is transmitted via the friction linings 8 to the input portion 2. The spacer bolts 9 of the input portion 2 strike one of the flange portions 10, 11 so that it acts on the resilient device 16. The torque is transmitted to the other output-side flange portion 11, 10, which strikes the tooth arrangement 13 and which transmits the torque to the hub 12, via the resilient elements 17, 18 and the intermediate flange 15. In the thrust phase, the torque is conversely transmitted from the hub 12 to the friction linings 8 by one of the flange portions 11, 10 transmitting, by striking the tooth arrangement 13, the torque to the resilient elements 17, 18 and the intermediate flange 15 to the other flange portion 10, 11 which strikes the spacer bolts 9 so that torque is thereby transmitted to the flange portions 6, 7 and finally to the friction linings 8.

[0030] The flange portions 6, 7 are centered on the hub 12 with plastics bushes 21, 22 being interposed. The intermediate flange 15 is arranged in a floating manner with respect to the hub 12. The intermediate flange 15 is securely connected to the pendulum mass carrier 23 via the spacer bolts 26 which engage axially through the recesses 24, 25 of the flange portion 10 and the flange portion 6. The recesses 24, 25 are constructed in such a manner that an undisrupted rotation of the intermediate flange 15 with respect to the flange portions 6, 10 is made possible.

[0031] The pendulum mass carrier 23 is formed by the two lateral portions 28, 29 which are connected to each other with axial spacing by means of the spacer bolts 27. The lateral portions 28, 29 take up between them the pendulum masses 30 which are arranged so as to be distributed over the circumference and which in a manner known per se are received by means of pendulum bearings with respect to the pendulum mass carrier 23 in the centrifugal field so as to be able to oscillate so as to form a torsional vibration damper which adapts to speed. The friction sleeve 31 which is produced, for example, from plastics material and by means of which the pendulum mass carrier 23 is received on the axial projection 32 of the hub 12 so as to be centered and rotatable in a limited manner is received on the inner periphery of the lateral portions 28, 29. The intermediate flange 15 which is otherwise received in a floating manner is also centered on the hub 12 by means of the spacer bolts 26.

[0032] The pendulum masses 30 are accelerated in a radially outward direction in the case of adequate centrifugal force and supported via the pendulum bearings thereof on the lateral portions 28, 29 so as to be capable of oscillation. If the centrifugal force decreases as a result of low speeds of the clutch disk 1, or if it is zero in the case of a stationary clutch disk 1, the pendulum masses 30 located radially over the rotation axis d are supported in a radially inward direction. To this end, the pendulum masses 30 are supported in a radially inward direction by means of the radially effective resilient elements 33, such as helical pressure springs.

[0033] The centrifugal pendulum 5 is received with insulation from oscillations between the resilient elements 17, 18 so that the relevant mass moment of inertia is formed, apart from the pendulum masses 30, only by the pendulum mass carrier 23, the spacer bolts 26, 27 and the intermediate flange 15.

[0034] FIG. 2 is a cross-section of the clutch disk 1 of FIG. 1. Of the input portion 2, only the flange portion 6 with the friction linings 8 and the spacer bolts 9 are illustrated. The spacer bolts 9 partially engage through the recesses 34 of the intermediate flange 15 with circumferential play and each form stops 35 for the output-side flange portions 10, 11 in a torque direction, in the illustrated operating position for the flange portion 11. There are received between the flange portion 10 and the intermediate flange 15 and the flange portion 11 and the intermediate flange 15 two diametrically opposed resilient elements 17, 18 which are formed by the helical pressure springs 19, 20, for example, in a slightly pretensioned state. The flange portions 10, 11 are received on the hub 12 in a rotationally engaging manner via the tooth arrangement 13 with circumferential backlash. The intermediate flange 15 is securely connected by means of the spacer bolts 26 to the pendulum mass carrier (not visible) 23 of the centrifugal pendulum 5 (FIG. 1).

[0035] FIG. 3 is an exploded view of the clutch disk 1 having the centrifugal pendulum 5. The centrifugal pendulum 5 is formed by the pendulum mass carrier 23 and the pendulum masses 30. The pendulum mass carrier 23 is formed by the two lateral portions 28, 29 which are connected to each other by means of the spacer bolts 26 with axial spacing. The pendulum masses 30 are supported in a radially inward direction by means of the resilient elements 33. The pendulum mass carrier 23 is received in a centered manner on the axial projection 32 of the hub 12 by means of the friction sleeve 31 which is received on the lateral portions 28, 29. The centrifugal pendulum 5 is securely connected to the intermediate flange 15 by means of the spacer bolts 26. The output-side flange portions 10, 11 flank the intermediate flange 15 and are received with circumferential backlash on the tooth arrangement 13 of the hub 12. The resilient elements 17, 18 are each received so as to be able to be tensioned between one of the two flange portions 10, 11 and the intermediate flange 15 and formed by the helical pressure springs 19, 20. The flange portion 6 with the friction linings 8 and the flange portion 7 are connected to each other by means of the spacer bolts 9 and centered on the hub 12 by means of the plastics bushes 21, 22.

[0036] FIG. 4 is a schematic circuit diagram of the clutch disk 1 of FIGS. 1 to 3. In a tensile phase of the clutch disk 1, the torque which is introduced into the clutch disk 1 in the direction of the arrow 36 via the friction clutch and the friction linings is transmitted from the input portion 2 via the stop 35 to the flange portion 10. This flange portion lifts off from the tooth arrangement 13 of the hub 12 and acts on the resilient device 16 with the resilient elements 17, the intermediate flange 15 and the resilient elements 18. The rigidities of the resilient elements 17, 18 can be identical or different. The characteristic lines of the resilient elements 17, 18 may have one step or multiple steps. The torque is transmitted to the flange portion 11. This flange portion moves into positive-locking connection with the hub 12 at the tooth arrangement 13 so that in the direction of the arrow 37 the torque which is insulated from oscillations by the torsional vibration damper 4 and the centrifugal pendulum 5 is transmitted to a gear input shaft. The centrifugal pendulum 5 with the pendulum masses 30 which oscillate in a plane perpendicular to the rotation axis of the clutch disk 1 in accordance with the double-headed arrow 38 has a low mass moment of inertia or an advantageous mass ratio of the pendulum masses 30 with respect to the non-oscillating masses as a result of the low mass of the pendulum mass carrier thereof and the intermediate flange 15. There is provided between the input portion 2 and the hub 12 the friction device 39 which, for example, may be formed a friction sleeve which is arranged between the pendulum carrier and the hub 12. In a thrust direction counter to the arrows 36, 37, the hub 12 carries the flange portion 11 with the resilient device 16 being loaded. The torque which is directed via the resilient device 16 is transmitted to the input portion 2 by means of the flange portion 10 via the stop 35.

LIST OF REFERENCE NUMERALS

[0037] 1 Clutch disk [0038] 2 Input portion [0039] 3 Output portion [0040] 4 Torsional vibration damper [0041] 5 Centrifugal pendulum [0042] 6 Flange portion [0043] 7 Flange portion [0044] 8 Friction lining [0045] 9 Spacer bolts [0046] 10 Flange portion [0047] 11 Flange portion [0048] 12 Hub [0049] 13 Tooth arrangement [0050] 14 Circumferential backlash [0051] 15 Intermediate flange [0052] 16 Resilient device [0053] 17 Resilient element [0054] 18 Resilient element [0055] 19 Helical pressure spring [0056] 20 Helical pressure spring [0057] 21 Plastics bush [0058] 22 Plastics bush [0059] 23 Pendulum mass carrier [0060] 24 Recess [0061] 25 Recess [0062] 26 Spacer bolt [0063] 27 Spacer bolt [0064] 28 Lateral portion [0065] 29 Lateral portion [0066] 30 Pendulum mass [0067] 31 Friction sleeve [0068] 32 Projection [0069] 33 Resilient element [0070] 34 Recess [0071] 35 Stop [0072] 36 Arrow [0073] 37 Arrow [0074] 38 Double-headed arrow [0075] 39 Friction device [0076] d Rotation axis