EP3158222A1

EP3158222A1 - Clutch disk comprising a centrifugal pendulum

Info

Publication number: EP3158222A1
Application number: EP15736389.6A
Authority: EP
Inventors: Alain Rusch
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2014-06-18
Filing date: 2015-05-12
Publication date: 2017-04-26
Also published as: CN106461011A; KR20170019453A; DE102014211723A1; CN106461011B; DE112015002864A5; WO2015192837A1; KR102460355B1

Abstract

The invention relates to a clutch disk comprising an input piece which is arranged to be rotatable about an axis of rotation (d) and supports friction linings radially on the outside, and an output piece which is in the form of a hub connected to a transmission input shaft for conjoint rotation therewith, and, optionally, a torsional vibration damper which is arranged radially within the friction linings so as to be effective between the input piece and the output piece in the circumferential direction, and a centrifugal pendulum (1) which comprises a support (2) connected to the hub for conjoint rotation therewith and pendulums (9, 10) that are distributed along the circumference of the support (2) and are suspended thereon so as to oscillate within a centrifugal field of the rotating clutch disk. In order to be able to design the centrifugal pendulum (1) in such a way that same does not create any dynamic loads on the transmission input shaft on at least two orders of oscillation, at least two groups (7, 8) of pendulums are provided, and said at least two groups (7, 8) are alternatingly distributed along the circumference, are adjusted to different orders of oscillation, and each comprise pendulums (9, 10) that are arranged in such a way as to be rotationally symmetrical to the axis of rotation (d).

Description

Clutch disc with centrifugal pendulum

The invention relates to a clutch disc having a radially outwardly friction lining, an input part rotatable about an axis of rotation and an output part designed to be rotationally connected to a transmission input shaft and optionally a torsional vibration damper arranged radially within the friction linings in the circumferential direction between the input part and output part a centrifugal pendulum with a support rotatably connected to the hub and distributed over the circumference of the carrier, pendulum pendulum pendulum suspended in a centrifugal force field of the rotating clutch disc.

From WO2012 / 079557 A1 a clutch disc with a centrifugal pendulum is known, are suspended in the three distributed over the circumference pendulum on a support flange in the centrifugal force field of the rotating clutch disc. The support flange is received on the clutch hub and the pendulums are received by means of rollers on the support flange, wherein the rollers pass through each other complementary to each other in the support flange and provided in the commutes cutouts with roller conveyors and roll on these roller conveyors. As a result, a speed-adaptive torsional vibration damper is formed, which is tuned to a discrete order of vibration, for example to the vibration order of a diesel engine with four cylinders. Here, the torsional vibration damper over the entire speed range of the diesel engine is effective. In addition, between the input and output part, a torsional vibration damper is provided with a spring device with coil springs acting in the circumferential direction between the input and output part and a friction device for damping torsional vibrations. Yet can with appropriate cylinder arrangements, with the possibility of partial shutdown of cylinders of an internal combustion engine and the like remain vibration parts.

It is therefore an object of the invention to propose a clutch disc with a centrifugal force spring, which is adapted in an improved manner to a vibration behavior of an internal combustion engine.

The object is solved by the subject matter of claim 1. The dependent claims give advantageous embodiments of the subject matter of claim 1 again.

The proposed, about a rotational axis, for example, a rotational axis of a crankshaft of an internal combustion engine arranged and received in a friction clutch clutch disc includes an input part with radially outer friction linings. The output part is designed as a hub and, for example by means of an internal toothing with an output shaft, for example, a gear input shaft rotatably connected. In the simplest case, input and output part can be connected to each other in a rotationally fixed manner. Advantageously, input and output part can be formed limited against each other rotatable, wherein between the input and output part, a torsional vibration damper is effectively arranged. For this purpose, input and output part can have corresponding radially arranged disc parts with windows in which helical compression springs are accommodated and are compressed in relative rotation of the input and output-side disc parts against each other. Over at least a portion of the angle of rotation between the input and output part, a friction device can be effective. On the clutch disc, a centrifugal pendulum is preferably received within the axial space of this rotationally fixed. The centrifugal pendulum contains a rotatably connected to the hub, for example, toothed and axially fixed, for example caulked carrier. On the carrier are distributed over the circumference, received in a centrifugal force field of the rotating clutch disc pendulum suspended pendulum. In the case of rotational irregularities of the rotating clutch disc, the pendulums are accelerated on their pendulum tracks from an equilibrium position and absorb energy from the carrier depending on the direction of acceleration or deliver it to the carrier, so that the carrier and thus the components arranged around the axis of rotation with respect to the Rotational deformities are calmed. The proposed centrifugal pendulum contains at least two pendulum groups with pendulum. The pendulums of a pendulum group are identical. The pendulum groups are evenly distributed over the circumference. This means that the pendulums of each pendulum group are evenly distributed over the circumference and thus rotationally symmetrical and the pendulums of the individual pendulum groups are distributed over the circumference. Here, the at least two pendulum groups are tuned to different vibration orders, so that the rotational irregularities of several vibration orders of an internal combustion engine ine by means of a single centrifugal pendulum of a clutch disc speed-adaptive can be paid off.

According to an advantageous embodiment of a clutch disc with centrifugal pendulum pendulum groups can be provided with two diametrically opposed pendulums matched to two different vibration orders. In this case, two pendulums of a pendulum group, ie four pendulums are arranged alternately over the circumference. It is understood that in further embodiments For example, one pendulum group may have four and the other may have two or four pendulums. Furthermore, a centrifugal pendulum, for example, be tuned to four vibration orders when four pendulum groups, each with two diametrically opposite pendulums, which are arranged alternately over the circumference, are used. Furthermore, three pendulum groups tuned to three different vibration orders can be provided, with two diametrically opposed pendulums being alternately provided over the circumference.

Furthermore, for example, two pendulum groups can be provided, each with three arranged at a distance of 120 ° about the axis of oscillation commuting, with the total of six pendulums of the two pendulum groups alternate over the circumference. As far as advantageous due to the number of pendulums and the vibration orders occurring, further pendulum groups can be provided with two or three rotationally symmetrical pendulums.

The oscillating recording of the pendulum relative to the carrier is preferably carried out by means of rollers, wherein in each case a roller cutouts in the pendulum and in the carrier passes through and rolls on provided in the neckline raceways such as roller conveyors. The statically determined in centrifugal force receiving the pendulum against the carrier can be achieved by the carrier is formed of two the pendulum between them receiving disc parts. In this case, each disk part has corresponding cutouts with roller conveyors and the pendulum has complementary cutouts with roller conveyors for accommodating one roller each. Here, both disc parts or only one disc part with the hub can be rotationally interlocked and axially caulked or otherwise firmly connected. When fixing only one Disc part with the hub, the other disc part is connected to the attached disc part, for example by means of rivets.

In order to increase, for example, the oscillating mass, the carrier may alternatively be formed from a pendulum flange receiving pendulum elements on both sides. Here, the pendulum flange cutouts and roller conveyors and the pendulum elements corresponding cutouts and roller conveyors for receiving in each case a role. Axially opposed pendulum elements in each case form a pendulum, wherein the pendulum elements are axially spaced connected by means of connecting elements which pass through correspondingly according to the securing of the pendulum movement recessed openings of the pendulum.

The pendulums are accommodated on the carrier, for example by forming the roller conveyors, so that they preferably execute a pendulum motion corresponding to a bifilar suspended pendulum with parallel or trapezoidal arranged filaments. For this purpose, the carrier and the pendulum each have two circumferentially spaced roller tracks. The roller conveyors are preferably curved in the carrier with a maximum relative to the axis of rotation and the roller conveyors in the pendulum arcuate formed with a minimum relative to the axis of rotation. In order to provide uniform restoring forces of the pendulums in the centrifugal force field, the roller conveyors are preferably designed symmetrically with respect to their axis of rotation starting from their maxima and minima on both sides.

To tune the pendulum groups on the proposed vibration orders pendulum with respect to their pendulum angle, the shape of the roller conveyors, the rollers, the mass and contour are set. For example, the pendulums of a pendulum group may have the same and, compared to the pendulums of at least one other pen, delgro have a different mass. Alternatively or additionally, the pendulums of a pendulum group may have the same and opposite the pendulums of the at least one other pendulum group a different outer contour. Alternatively or additionally, pendulum tracks of the pendulum of a pendulum group relative to the pendulum tracks of the pendulum of at least one other pendulum group can be designed differently.

The invention will be explained in more detail with reference to the embodiment shown in Figures 1 to 7. Showing:

1 shows a 3D view of a centrifugal pendulum of a clutch disc, FIG. 2 shows the centrifugal pendulum of FIG. 1 in a partially sectioned view,

FIG. 3 shows the centrifugal pendulum of FIG. 2 in section along the section line A-A, FIG. 4 shows a section through the centrifugal pendulum of FIG. 2 along the section line B-B,

FIG. 5 shows a detail X of the centrifugal pendulum pendulum of FIG. 3 in section,

Figure 6 is a view of the centrifugal pendulum pendulum of Figure 1 at stop in

Clockwise arranged pendulum

and

Figure 7 is a view of the centrifugal pendulum pendulum of Figure 1 with arranged counter-clockwise pendulum stop.

1 shows the rotationally fixed on a hub of a clutch disk, not shown, centrifugal pendulum 1 in a 3D view. The remaining structure of the clutch disc is known per se and can be taken, for example, the cited prior art. The centrifugal pendulum 1 contains the from the two By means of the internal toothing 5 of the disk parts 3, 4, the centrifugal pendulum 1 is rotatably mounted on the hub and axially fixed, for example by caulking. The disc parts lie radially inwardly against each other and are radially outwardly expanded axially and connected by means of the spacer bolts 6 axially spaced apart. Axially between the two disc parts 3, 4, the two pendulum groups 7, 8 are added. The pendulum 9, 10 of the two pendulum groups 7, 8 are each arranged diametrically opposite each other and alternate over the circumference.

The pendulums are each received by means of two circumferentially spaced pendulum bearings 1 1, 12 on the disc parts 3, 4. For this purpose, in the disc parts 3, 4 recesses 13, 14, 15, 16 as cutouts with arcuate roller conveyors 17, 18, 19, 20 are provided. The roller conveyors 17, 18, 19, 20 are open radially inward. In the pendulums 9, 10 not exactly visible, to the recesses 13, 14, 15, 16 complementary recesses are provided with radially outwardly opened roller conveyors in this representation. The rollers 21, 22 roll on the roller conveyors and form a pendulum suspension of the pendulum 9, 10 on the carrier 2 under the influence of centrifugal force of the rotating carrier 2.

The pendulum groups 7, 8 are tuned to different vibration orders. For this purpose, the pendulum 9 of the pendulum group 7 are provided with a larger mass and a more extensive in the circumferential direction contour as the pendulum 10 of the pendulum group 8 and swing on shallower pendulum tracks, that is on a larger pendulum radius with larger pendulum angles. In the embodiment shown, the roller diameters of the rollers 21, 22 of the two pendulum groups 7, 8 are the same. In the embodiment shown, the pendulum group 7 is on a vibration order "1, 5" and the pendulum group 8 designed for a vibration order "3". In order to minimize the mass of the carrier 2 and, if appropriate, to permit a passage on the clutch disk during assembly or the like, the disk parts 3, 4 have recesses 31, 32, 33, 34.

FIG. 2 shows the centrifugal pendulum pendulum 1 of FIG. 1, which can be rotated about the axis of rotation d, in a balanced position with the maxima of the roller conveyors 17, 18, 19, 20 of the disc parts 3, 4 and the minima Min of the roller conveyors 27, 28, 29, 30 of the recesses 23, 24, 25, 26 of the pendulum 9, 10 arranged rollers 21, 22. To form the restoring forces of the pendulum 9, 10 symmetrically under centrifugal force are the roller tracks 17, 18, 19, 20 of the disc parts. 3 , 4 and the roller tracks 26, 27, 28, 29, 30 of the pendulum 9, 10 each formed symmetrically to their maxima Max or Minima Min.

3 shows the centrifugal pendulum 1 of Figure 2 in longitudinal section along the section line A-A. In addition to the two disc parts 3, 4 and the only visible pendulum of the pendulum 9 of the disc parts 3, 4 axially spaced connecting spacer pin 6 can be seen. Furthermore, the preferably made of plastic such as an elastomer support ring 35 can be seen, which forms a stop buffer for the stationary centrifugal force pendulum 1 above the axis of rotation and from the pendulum bearings 1 1, 12 (Figure 1) falling pendulum and thereby a hard, noise-generating, metallic stop between the pendulum and the disc parts 3, 4 avoids.

FIG. 4 shows by way of example one of the self-aligning bearings 1 1 in section along the section line BB of FIG. 2 with the two disk parts 3, 4, the pendulum 9 and the roller 21. The roller 21 is step-shaped and thus axially secured and posi- Under centrifugal force is formed on the roller conveyors 18, 28 a rolling contact between the disc parts 3, 4, the pendulum 9 and the roller 21 from.

FIG. 5 shows the detail X of FIG. 3 with the step-shaped spacing bolt 6 arranged between the disk parts 3, 4 for the axially spaced connection of the disk parts 3, 4 in the form of a riveting.

Figures 6 and 7 show the centrifugal pendulum 1 in the stop position of the pendulum 9, 10 on the disc parts 3, 4 in view or partially sectioned view. The stop position is determined by the rollers 21, 22 which abut each of the peripheral-side walls of the recesses 13, 14, 15, 16 of the disc parts 3, 4 and the recesses 23, 24, 25, 26 of the pendulum 9, 10. FIG. 6 shows the pendulum 9, 10 bounded by stop in a clockwise direction on the disk parts 3, 4. FIG. 7 shows the pendulum 9, 10 limited counterclockwise at the disk parts 3, 4 by the stop.

List of accessories for centrifugal pendulum

carrier

disk part

internal gearing

Standoffs

pendulum group

pendulum

aligning bearing

recess

roller conveyor

role

recess

roller conveyor

roller conveyor 31 recess

32 recess

33 recess

34 recess

35 Support ring A-A Section line B-B Section line d Rotation axis X Detail

Claims

claims

Clutch disc having a radially outer friction linings bearing, about a rotational axis (d) rotatably engordneten input part and designed as a rotationally connected to a transmission input shaft hub output part and optionally circumferentially between input part and output part effectively radially disposed within the friction linings torsional vibration damper and a centrifugal pendulum ( 1) with a support rotatably connected to the hub (2) and on the support (2) distributed over the circumference, pendulum in a centrifugal force field of the rotating clutch disc suspended pendulums (9, 10), characterized in that at least two alternately over the circumference distributed, matched to different vibration orders pendulum groups (7, 8) with rotationally symmetrical to the axis of rotation (d) arranged pendulums (9, 10) are provided.

Clutch disk according to claim 1, characterized in that two pendulum groups (7, 8), which are tuned to two different vibration orders, are provided, each with pendulums (9, 10) arranged diametrically opposite one another.

Clutch disc according to claim 1, characterized in that three are arranged on three different vibration orders pendulum groups are provided with two diametrically opposite arranged pendulums.

Clutch disc according to one of claims 1 to 3, characterized in that the carrier (2) consists of two the pendulum (9, 10) receiving between them, roller tracks (17, 18, 19, 20) for on the roller conveyors (17, 18, 19, 20) and to these complementary roller conveyors (27, 28, 29, 30) of the pendulum (9, 10) rolling rollers (21, 22) having disc parts (3, 4) is formed.

Clutch disc according to one of claims 1 to 3, characterized in that the carrier of a bilateral pendulum elements receiving, roller conveyors formed on the roller conveyors and to these complementary roller conveyors of the pendulum elements rolling rollers having pendulum is, with axially opposite pendulum elements are connected to each other and form a pendulum.

6. Clutch disc according to one of claims 1 to 5, characterized in that the carrier (2) and the pendulum (9, 10) in each case two spaced apart in the circumferential direction roller tracks (17, 18, 19, 20, 27, 28, 29 , 30).

7. clutch disc according to one of claims 4 to 6, characterized in that the roller tracks (17, 18, 19, 20) in the carrier (2) arcuate with a maximum (Max) relative to the axis of rotation (d) and the roller tracks (27, 28, 29, 30) in the pendulums (9, 10) arcuately formed with a minimum (Min) with respect to the axis of rotation (d) and with respect to their both sides of their maxima (Max) and minima (Min) outgoing symmetrical to the axis of rotation (d ) are formed.

8. Clutch disc according to one of claims 1 to 7, characterized in that the pendulum (9) of a pendulum group (7) the same and with respect to the pendulums (10) of the at least one other pendulum group (8) have a different mass.

9. Clutch disc according to one of claims 1 to 8, characterized in that the pendulum (9) of a pendulum group (7) the same and with respect to the pendulums (10) of the at least one other pendulum group (8) have a different outer contour.

10. clutch disc according to one of claims 1 to 9, characterized in that roller conveyors (17, 18, 27, 28) of the pendulum (9) of a pendulum group (7) against the roller conveyors (19, 20, 29, 30) of the pendulum ( 10) of the at least one other pendulum group (8) are formed differently.