DE102018117736A1 - PREVENTED BUMPER DAMPING DEVICE - Google Patents

Abstract

Pendulum damping device, which is particularly intended to be received in a motor vehicle transmission chain, in particular in a clutch, the device comprising: - a holder (12) - a plurality of pendulums, which are arranged about a rotation axis X of the holder; wherein a pendulum (13) comprises: - a flywheel (14), - a rolling element (16), which is arranged between the flywheel and the holder, so that it is at a vibration of the flywheel with respect to the holder on holder and Flywheel roller conveyors are rolling, - a contact pressure element (30) which is fixedly connected to the flywheel or the holder and at least in a rest position of the holder, in which the holder is stationary and extending horizontally, centripetal or centrifugally elastic on a pressure track (32) rests defined by the holder or the flywheel and has the same shape as the Halterrollbahn.

Description

Technical area

The invention relates to a pendulum damping device, in particular for a motor vehicle clutch, as well as a Torsionsdämpfungsvorrichtung in which such a pendulum damping device is added.

State of the art

A pendulum damping device is commonly used to filter the vibrations due to the nonuniformities of the motor of a motor vehicle. The pendulum damping device is conventionally fastened with rivets rigidly to a phase disc of a torsion damping device, in particular a clutch, a hydrodynamic torque converter or a dry or wet double clutch.

Conventionally, it has an annular holder which is to be rotated, as well as a plurality of pendulum flywheels, which are mounted on an axis parallel to the axis of rotation of the holder swinging the holder. The displacement of a flywheel in relation to the holder is generally performed by two rolling members, each cooperating with a runway of the holder and a rolling track of the flywheel. The runway of the holder and the flywheel extend in such a way that the rolling elements rest centrifugally or centripetally on the tracks.

A flywheel conventionally consists of two pendulum weights, which sandwich the holder and are generally rigidly connected to each other via a strut which defines the rolling element of the flywheel.

When the pendulum damping device rotates at a reduced speed of typically less than 800 revolutions per minute, particularly at startup, in the deceleration phase of the vehicle, when stopping the engine, or during a gearshift, the centrifugal force exerted on the flywheels decreases, and the flywheels then do so tend to approach the axis of rotation. The contact between the flywheels and the runways can thus be interrupted, which leads to unwanted noise and shocks that can reduce the life of the pendulum damping device.

There is thus a need for a pendulum damping device that at least partially solves these problems.

An object of the invention is to respond to this need.

Summary of the invention

• - einen Halter;
• - mehrere Pendel, die um eine Drehachse X des Halters angeordnet sind; wobei ein Pendel, vorzugsweise jedes Pendel Folgendes aufweist:
• - eine Schwungmasse;
• - ein Rollorgan, das zwischen der Schwungmasse und dem Halter angeordnet ist, so dass es bei einer Schwingung der Schwungmasse in Bezug auf den Halter auf Halter- und Schwungmassenrollbahnen rollt;
• - ein Anpressorgan, das mit der Schwungmasse oder dem Halter fest verbunden ist und zumindest in einer Ruhestellung des Halters, in der der Halter feststehend ist und sich horizontal (die Achse X verläuft vertikal) erstreckt, und vorzugsweise zumindest bis zu einer Drehgeschwindigkeit des Halters um die Achse X, die mehr als 300 Umdrehungen/min, vorzugsweise mehr als 500 Umdrehungen/min, vorzugsweise mehr als 700 Umdrehungen/min, vorzugsweise mehr als 800 Umdrehungen/min, sogar unabhängig von der Drehgeschwindigkeit, zentripetal bzw. zentrifugal elastisch auf einer Anpressbahn aufliegt, die von dem Halter bzw. von der Schwungmasse definiert ist und die gleiche Form wie die Halterrollbahn hat.

For this purpose, the invention proposes a pendulum damping device, which is in particular intended to be received in a motor vehicle transmission chain, in particular in a clutch, the device comprising:

• a holder;
• - Several pendulums, which are arranged about a rotation axis X of the holder; a pendulum, preferably each pendulum, comprising
• - a flywheel;
• - A rolling element, which is arranged between the flywheel and the holder, so that it rolls with a vibration of the flywheel with respect to the holder on holder and flywheel rollerways;
• - A pressing member which is fixedly connected to the flywheel or the holder and at least in a rest position of the holder in which the holder is fixed and extending horizontally (the axis X extends vertically), and preferably at least up to a rotational speed of the holder to the axis X, the more than 300 revolutions / min, preferably more than 500 revolutions / min, preferably more than 700 revolutions / min, preferably more than 800 revolutions / min, even regardless of the rotational speed, centripetal or centrifugally elastic on a pressure track rests defined by the holder or the flywheel and has the same shape as the Halterrollbahn.

At a reduced rotational speed is thus the radial displacement of the flywheel on the one hand by the rolling elements, which counteract when resting on the Halterrollbahn a radial displacement away from the axis X, and on the other by the Anpressorgan, which when resting on the pressure path of a radial displacement to Axis X counteracts obstructed. The elasticity of the pad allows a slight compression of the flywheel and the rolling organs. These thus remain in contact with the holder and flywheel taxiways.

The elasticity of the system also advantageously allows the compensation of the games, resulting from the manufacturing or wear tolerances. The life of the device is thereby extended.

Due to the coincidence of the shapes of the pressing tracks and the holder roller tracks, it is advantageously possible, regardless of the angular position of the flywheel with respect to the holder in their oscillatory motion to ensure a substantially constant strength of the compressive force.

Such an overlay preferably exerts a compressive force of less than 15 N, preferably less than 10 N, and preferably less than 1 N. This force is preferably between 1 and 3 N for a Double Floating Amortiseur (DVA) and between 5 and 15 N for a truck primary flywheel.

The pressing track of the holder is preferably designed so that in the rest position, the pressure force at a vibration of the flywheel on the holder by less than 10 N, preferably less than 5 N, preferably less than 3 N, preferably less than 1 N varies. In other words, the effect of the pressing member is substantially independent of the angular position of the flywheel with respect to the holder.

• - das Anpressorgan ist eine Kugel, eine Rolle oder ein Zapfen, die/der an der Schwungmasse befestigt ist und an der/dem eine Lagerung, z.B. eine Kugellagerung vorzugsweise über einen elastischen Ring in Anlage am Halter angebracht ist;
• - das Anpressorgan ist eine Rolle mit einem ersten und einem zweiten seitlichen Stift, die drehbar in einem ersten und einem zweiten Lager angebracht sind, die in der Schwungmasse und insbesondere in einem ersten bzw. zweiten Pendelgewicht der Schwungmasse ausgebildet sind;
• - bei einer ersten Ausführungsform umfasst die Schwungmasse ein erstes und ein zweites Pendelgewicht, die vorzugsweise über eine Strebe starr miteinander fest verbunden sind, den Halter sandwichartig aufnehmen und das Anpressorgan elastisch zusammendrücken, so dass es elastisch zur Achse X gedrückt wird, wobei die Dicke des ersten und zweiten Pendelgewichts vorzugsweise weniger als 7 mm, 5 mm, 4 mm, 3 mm oder 2 mm beträgt;
• - bei einer zweiten Ausführungsform weist die Schwungmasse eine Feder, vorzugsweise eine Blattfeder auf, die so angebracht ist, dass sie das Anpressorgan elastisch zur Achse X drückt;
• - die Schwungmasse umfasst ein erstes und ein zweites Pendelgewicht, zwischen denen die Feder angebracht ist, wobei die Dicke des ersten und zweiten Pendelgewichts vorzugsweise größer oder gleich 3 mm, vorzugsweise größer oder gleich 4 mm ist.

When the pressing track is defined by the holder, a pendulum damping device according to the invention may also have one or more of the following optional and preferred features:

• - The pressing member is a ball, a roller or a pin which is attached to the flywheel and on the / a storage, such as a ball bearing is preferably mounted via an elastic ring in contact with the holder;
• - The pressing member is a roller having a first and a second lateral pin, which are rotatably mounted in a first and a second bearing, which are formed in the flywheel and in particular in a first and second pendulum weight of the flywheel;
• in a first embodiment, the flywheel comprises a first and a second pendulum weight, preferably rigidly connected together by a strut, sandwiching the holder and resiliently compressing the pressing member so that it is pressed elastically to the axis X, the thickness of the first and second pendulum weights preferably less than 7 mm, 5 mm, 4 mm, 3 mm or 2 mm;
• - In a second embodiment, the flywheel on a spring, preferably a leaf spring, which is mounted so that it presses the pressing member elastically to the axis X;
• - The flywheel comprises a first and a second pendulum weight, between which the spring is mounted, wherein the thickness of the first and second pendulum weight is preferably greater than or equal to 3 mm, preferably greater than or equal to 4 mm.

• - das Anpressorgan ist eine Kugel, eine Rolle oder ein Zapfen, die/der am Halter befestigt ist und an der/dem die erste und die zweite Lagerung, z.B. Kugellagerungen, vorzugsweise über elastische Elemente wie elastische Stäbe in Anlage an einem ersten bzw. an einem zweiten Pendelgewicht der Schwungmasse angebracht sind;
• - das Anpressorgan ist eine Rolle, die drehbar am Halter angebracht ist;
• - das Anpressorgan ist zwischen zwei Wänden des Halters sandwichartig aufgenommen, die es elastisch zusammendrücken, um es weg von der Achse X zu drücken, wobei die Dicke der Wände vorzugsweise weniger als 2 mm, vorzugsweise weniger als 1 mm beträgt;
• - bei einer weiteren Ausführungsform weist der Halter eine Feder, vorzugsweise eine Blattfeder auf, die so angebracht ist, dass sie das Anpressorgan elastisch weg von der Achse X drückt;
• - der Halter weist Wände auf, zwischen denen die Feder angebracht ist.

When the pressing track is defined by the flywheel, a pendulum damping device according to the invention may also have one or more of the following preferred optional features:

• - The pressing member is a ball, a roller or a pin which is attached to the holder and on the / the first and the second bearing, eg ball bearings, preferably via elastic elements such as elastic rods in abutment against a first or on a second pendulum weight of the flywheel are mounted;
• - The pressing member is a roller which is rotatably mounted on the holder;
• - The pressing member is sandwiched between two walls of the holder, which compress it elastically to push it away from the axis X, wherein the thickness of the walls is preferably less than 2 mm, preferably less than 1 mm;
• - In another embodiment, the holder on a spring, preferably a leaf spring, which is mounted so that it presses the pressing member elastically away from the axis X;
• - The holder has walls between which the spring is mounted.

In general, the contact pressure element and / or the holder and / or the flywheel has / have a region of elastomeric material which imparts elasticity to the abutment of the contact pressure element on the flywheel and / or on the holder.

The invention also relates to a torsion damping device in which a pendulum damping device according to the invention is incorporated.

The torsion damping device according to the invention is preferably selected from a double-damping flywheel, a hydrodynamic torque converter and a friction disk.

The invention also relates to a motor vehicle equipped with a torsion damping device according to the invention.

list of figures

• - 1 perspektivisch eine Torsionsdämpfungsvorrichtung; und
• - 2 bis 6 verschiedene Ausführungsformen der Erfindung.

Further features and advantages of the invention will become apparent upon reading the detailed description and upon consideration of the accompanying drawings. Show in it

• - 1 in perspective, a torsion damping device; and
• - 2 to 6 various embodiments of the invention.

At each of the 2 to 6 the figure indicated by "b" is a section of the figure indicated by "a" along the sectional plane AA. The 2c and 2d show excerpts from 2a ,

The figures indicated by "a" each show a flywheel in a middle position with respect to the swinging motion on the holder. Both 3 to 5 Each figure indicated by "c" shows the flywheel in a swing end position with respect to the holder.

6 shows in a radial sectional plane a section of a pressing member in a particular embodiment.

In the various figures, identical reference numerals are used to designate identical or similar organs.

definitions

The pressing member is referred to as "fixedly connected" with the flywheel or the holder if it can not be solved. It can be rigidly attached to the flywheel or to the holder or movably attached to the flywheel or to the holder.

An "elastic pad", in contrast to a simple contact, creates the pressing of one part onto another, the elasticity allowing a change of this pressure by the relative displacement of these two parts.

• - -bedeutet „axial“ „parallel zur Drehachse X des Halters“,
• - bedeutet „radial“ „entlang einer Querachse, die die Drehachse des Halters schneidet“;
• - bedeutet „quer“ „in einer zur Drehachse des Halters senkrechten Ebene“;
• - -bedeutet „winkelmäßig“ oder „umfangsmäßig“ „um die Drehachse des Halters herum“,
• - -bedeutet „orthoradial“ „senkrecht zu einer radialen Richtung und in einer Querebene“.

Unless otherwise stated

• - meaning "axially""parallel to the axis of rotation X of the holder",
• - "radial" means "along a transverse axis which intersects the axis of rotation of the holder";
• - means "transverse""in a plane perpendicular to the axis of rotation of the holder";
• - meaning "angular" or "circumferential""around the axis of rotation of the holder",
• - means "orthoradial""perpendicular to a radial direction and in a transverse plane".

By "transverse plane" is meant a plane perpendicular to the axis of rotation of the holder.

By "radial plane" is meant a plane containing a radial axis and axis X.

By "axial plane" is meant a plane containing the axis X.

A "radius" is a straight line formed by the intersection of a transverse plane and a radial plane.

"The thickness" of a part refers to a dimension measured along the axis X.

By "centrifugal support" is meant a bearing force comprising a component directed away from the axis X.

By "centripetal support" is meant a bearing force that comprises a component directed to the axis X.

Under "motor vehicle" are not only passenger cars, but also commercial vehicles to understand, which includes in particular heavy trucks, public transport or agricultural vehicles.

Unless otherwise indicated, the verbs are "include," "comprise," or "comprise" broad, i. not restrictive to understand.

Detailed description

By the holder defined pressing track

As in 1 shown has a pendulum damping device 10 a holder 12 on, which is rotatable about an axis X, as well as several pendulums 13 that in terms of the holder 12 are mobile.

The holder 12 has a general planar shape, which is generally annular. He has a radially outer edge 15 which is conventionally generally circular, and first and second large areas 12 ₁ and 12 ₂ that are essentially transverse.

The holder conventionally consists of a stamped sheet metal generally of steel and having a thickness of usually less than 10 mm, preferably less than 9 mm, preferably less than 8 mm.

On this sheet additional organs, such as damping buffers and / or stops and / or guides, which consist for example of polymer, be attached to dampen the oscillation of the flywheels and / or limit and / or lead.

Every pendulum 13 has a flywheel 14 and one or more, eg two rolling organs 16 on. Conventionally, each flywheel over two rolling elements, preferably rollers, which is formed in the thickness of the holder rolling window 20 traverse, swinging attached to the holder.

Every flywheel 14 conventionally comprises a first and a second pendulum weight 14 ₁ and 14 ₂ whose shape is generally flat and which are opposite to the first and the second large area 12 ₁ and 12 ₂ of the owner 12 extend.

The first and second pendulum weights 14 ₁ and 14 ₂ are preferably via a strut 18 rigidly attached to each other. The strut is sandwiched between the two pendulum weights and extends in the rolling window 20 of the owner. It defines a runway 22 the flywheel.

Every rolling organ 16 thus lies on the one hand on a Halterrollbahn 24 on, preferably by the inner contour of the rolling window 20 the holder is defined, and on the other hand on the flyweight runway 22 , which is defined by the strut of the flywheel.

The flywheel masses are preferably distributed at the same angle about the axis X. Their number is preferably greater than 2 and / or less than 8. The device may in particular have three, five or seven flywheel masses. At the in 1 As shown, the device has three flywheels which are distributed uniformly about the axis X.

The device has a pressing member for each flywheel 30 on, the elastic on a pressing track 32 rests when the holder rotates at a speed of less than 800 revolutions per minute about the axis X, and in particular when the holder is stationary. The pressing track 32 consists of all points of the holder, especially when oscillating the flywheel 14 with the pressure element 30 can get in touch.

As in 2a is shown, according to the invention, the shape of the pressing track 32 substantially identical to the shape of the holder roller tracks when the device is viewed along the axis X. To illustrate this, the pressure track and the roller tracks are in 2a shown with thick solid lines.

In the embodiment of the 2 . 4 and 5 becomes the pressing track 32 through the radially outer edge 15 of the owner 12 Are defined. The weight of the owner 12 is advantageously reduced thereby. In the embodiment of 3 becomes the pressing track 32 through the edge of a press window 40 defined in the thickness of the holder 12 is trained.

In the embodiment of 2 becomes the pressure element 30 between the first and second pendulum weights 14 ₁ and 14 ₂ compressed so that it is pressed on the pressure track. The elasticity of the overlay results from the ability of the two pendulum weights to elastically separate from one another and approach each other.

So that the effect of the pendulum weights on the contact pressure 30 leading to a force with a centripetal component, are the abutment surfaces S ₁ and S ₂ the pendulum weights 14 ₁ respectively. 14 ₂ on the pressing element 30 inclined. As in 2 B is shown in a section along a radial plane AA, which is substantially in the center of the pressing member 30 runs, at least one of the surfaces S ₂ and S ₂ , preferably each of the surfaces S ₁ and S ₂ with respect to a radius R at an angle a which is in an absolute value between 5 and 85 degrees, preferably more than 20 degrees, 30 degrees, 40 degrees and / or less than 70 degrees, 60 degrees, 50 degrees inclined ,

In the embodiment of 2 is the pressure element 30 a ball in bowls 34 ₁ and 34 ₂ are included, in the first and in the second pendulum weight 14 ₁ and 14 ₂ are formed. The cavities 34 ₁ and 34 ₂ are preferably substantially elongated and more preferably radially aligned. They thus allow a slight radial displacement of the Anpressorgans with respect to the pendulum weights, when the two pendulum weights move away from each other or approach each other.

In the embodiment of 2 are the cavities 34 ₁ and 34 ₂ continuous. The cavities 34 ₁ and 34 ₂ are advantageously conical to generate a radial force by axial clamping.

In the embodiment of 4 consists of the pressure element 30 from a roll 42 with the Y axis, with a first and a second pin 44 ₁ respectively. 44 ₂ equipped in a first and a second warehouse 46 ₁ and 46 ₂ are included in the first and in the second pendulum weight 14 ₁ and 14 ₂ are formed. The role 42 can thus rotate about the Y axis while remaining stationary with respect to the pendulum weights. In this embodiment, the elasticity of the support of the pressing member results on the holder 12 preferably from the compression of an elastomeric ring 48 with the Y axis, the role 42 clutching. The ring 48 is preferably in a circumferential groove 50 taken on the peripheral surface 52 the role 42 is defined, which extends between the first and the second pendulum weight.

The pressing mechanism off 5 is out of this 4 similar. However, the elasticity does not result from the presence of an elastic ring between the pressing member 30 and the pressing track 32 but from the elastic pad, by a spring 60 is exercised with the flywheel 14 is firmly connected. In the embodiment of 5 is it at the spring 60 around a leaf spring, with each of the two ends attached to the flywheel 14 is attached. In the embodiment of 5 are more precisely the ends of the spring 14 along the axes parallel to the axis X about pivot pins 62 ₁ respectively. 62 ₂ that is between the two pendulum weights 14 ₁ and 14 ₂ extend, rotatably mounted.

The mode of operation results directly from the previous one.

In operation, the pendulums swing under the effect of the engine irregularities. The centrifugal force exerted on the flywheels depends on the speed of rotation of the holder. When this speed is a high speed of typically more than 800 rpm, the flywheels push the rolling elements against the runway. The rolling of the rolling elements is thus guided and is quiet. The force exerted by a flywheel on a rolling element is usually more than 50 N, even more than 80 N, preferably substantially 100 N. The effect of the pressure element is weak and is for example less than 10 N and even equal to zero.

However, as the rotation speed of the holder decreases, the centrifugal force applied to the flywheels decreases. The flywheels thus tend to approach the axis X. If they approached the axis X sufficiently, the rolling elements could no longer be clamped between the holder and flywheel mass trajectories.

The pressing element 30 However, it is from the flywheel 14 elastic against the holder 12 pressed. The edition of the pressure element 30 on the press track 32 tends to remove the flywheel from the X axis, this removal being hindered by the support of the rolling elements on the flywheel roller track.

The rolling organs 16 are thus resiliently biased especially at rotational speeds of less than 800 revolutions / min.

However, the bias voltage has a low strength, which is usually less than 30 Newton in the rest position. This bias is substantially negligible, especially in relation to the pressure created by the rotation of the holder due to the centrifugal action.

The pressing element 30 generally practices the holder 12 a force F with a centripetal component, which, as in 2a shown, preferably aligned with the axis X.

The pressing element 30 thus counteracts the displacement of the flywheel masses to the axis X.

The pressing track is not necessarily formed on the holder. It can also be formed on the flywheel. The pressing member is then firmly connected to the holder. The pressing member attached to the holder is preferably designed so that it can roll on the pressing track.

6 illustrates such an embodiment. The pressing member has a pin 70 on the holder 12 is attached and attached to the two ball bearings 72 ₁ and 72 ₂ are formed, wherein the first and the second pendulum weight 14 ₁ and 14 ₂ via a first and a second elastic ring 74 ₁ and ₂ resting on the first or second ball bearing.

All of the technical equivalents described above, when the pressure path is defined by the holder, can be implemented when the pressure track is defined by the flywheel.

As can now be clearly seen, the invention provides a solution with which independent of the rotational speed of the holder and in particular at a rotational speed of less than 800 revolutions per minute permanent contact between the rolling elements and the runways can be ensured. However, this solution does not affect the correct operation of the device, especially at a high rotational speed, wherein the effect of the pressing member has a low intensity.

In addition, it is possible by the elasticity of the support, to ensure a minimum compressive force, even if the rolling elements or the Anpressorgan wear.

Finally, the shape of the pressing tracks is defined so that the compressive force exerted by the Anpressorganen remains substantially constant regardless of the angular position of the flywheels on the holder.

The noise level at low rotational speed is advantageously significantly reduced. In addition, the life of the device is thereby extended.

Of course, the invention is not limited to the particular embodiments described above.

Claims (10)

Pendulum damping device, which is in particular intended to be accommodated in a motor vehicle transmission chain, in particular in a clutch, the device comprising: a holder (12); a plurality of pendulums, which are arranged about a rotation axis X of the holder; wherein a pendulum (13) comprises a flywheel (14); a rolling member (16) disposed between the flywheel and the holder so as to roll on holder and flywheel tracks upon oscillation of the flywheel relative to the holder; a pressing member (30) which is fixedly connected to the flywheel or the holder and at least in a rest position of the holder, in which the holder is fixed and extending horizontally, centripetal or centrifugally resiliently rests on a pressure track (32), the the holder or of the flywheel is defined and has the same shape as the Halterrollbahn. A pendulum damping device according to the preceding claim, wherein the support exerts a compressive force (F) of less than 10N. Pendulum damping device according to the immediately preceding claim, wherein the pressing track is formed so that in the rest position, the pressure force at a vibration of the flywheel on the holder varies by less than 3 N. A pendulum damping device according to any one of the preceding claims, wherein the pressing member is a ball, a roller or a pin which is secured to the holder and to which a first and a second bearing preferably via elastic elements such as elastic rods in abutment with a are mounted first or at a second pendulum weight of the flywheel. Pendulum damping device according to the immediately preceding claim, wherein the pressing member has a first and a second lateral pin, which are rotatably mounted in a first and a second bearing, which are formed in the flywheel. A pendulum damping device according to any one of the preceding claims, wherein the flywheel comprises first and second pendulum weights rigidly connected to each other, sandwiching the retainer and elastically compressing the urging member so as to be resiliently urged to the axis X. Pendulum damping device according to one of the preceding claims, wherein the flywheel comprises a spring which is mounted so that it presses the pressing member elastically to the axis X. Pendulum damping device according to one of the preceding claims, wherein the pressing member and / or the holder and / or the flywheel has / have a range of elastomeric material, which gives the support of the Anpressorgans on the flywheel and / or the holder an elasticity. Torsion damping device with a pendulum damping device according to one of the preceding claims, wherein the torsion damping device is selected from a double-damping flywheel, a hydrodynamic torque converter and a friction disc. Motor vehicle equipped with a torsion damping device according to the immediately preceding claim.

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