DE102018121066A1 - Dampers - Google Patents

Abstract

Torsion damper, comprising:
a primary element and a secondary element rotatably mounted about the axis X on the primary element,
a pendulum damping device with a holder and a pendulum, which has a rolling element and a flywheel which is mounted on the holder via the rolling element,
a disengaging member adapted to maintain, in an engaged configuration, coupling of the secondary member to the retainer or, in a disengaged configuration, decoupling the secondary member from the retainer by rotating the retainer about the axis X with respect to the secondary member wherein the disengagement member is adapted to dispose the torsion damper in the disengaged configuration when the angle between the primary and secondary elements measured relative to a relative angular position of the primary and secondary elements at rest is about Axis X is equal to or less than a disengagement rash.

Description

Technical area

The invention relates to a torsion damper, which is in particular intended to be integrated in a motor vehicle transmission chain.

State of the art

A torsional damper with a pendulum damping device is conventionally used to filter the vibrations due to the nonuniformities of an automotive engine.

The pendulum damping device generally comprises an annular holder which is intended to be rotated, as well as a plurality of pendulums with flywheel masses and rolling elements, the pendulums being mounted on the holder so as to oscillate about an axis parallel to the axis of rotation of 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.

In use, the pendulums swing along the runways between two opposite end positions defined by held or defined stops.

If excessive engine torque is transmitted to the pendulum damping device, the pendulums may butt against the stops and the resulting impact may result in breakage of the rolling elements, rendering the pendulum damping device unusable.

There is thus a need to increase the life of the pendulum damping devices and thus the torsion damper containing them.

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

Summary of the invention

• - ein primäres Element und ein sekundäres Element, das um die Achse X drehbar am primären Element angebracht ist,
• - eine Pendeldämpfungsvorrichtung mit einem Halter und einem Pendel, der ein Rollorgan und eine Schwungmasse aufweist, die über das Rollorgan schwingend am Halter angebracht ist,
• - ein Ausrückorgan, das so ausgebildet ist, dass es in einer eingerückten Ausgestaltung eine Kopplung des sekundären Elements mit dem Halter aufrechterhält oder in einer ausgerückten Ausgestaltung das sekundäre Element durch Drehen des Halters um die Achse X in Bezug auf das sekundäre Element von dem Halter entkoppelt,

wobei das Ausrückorgan so ausgebildet ist, dass es den Torsionsdämpfer in der ausgerückten bzw. in der eingerückten Ausgestaltung anordnet, wenn der in Bezug auf eine relative Winkelposition des primären und des sekundären Elements in der Ruhestellung gemessene Winkel zwischen dem primären und dem sekundären Element um die Achse X größer oder gleich bzw. kleiner als ein Ausrückausschlag ist.For this purpose, the invention proposes a torsion damper which is in particular intended to be integrated in a motor vehicle transmission chain, the torsion damper comprising:

• a primary element and a secondary element rotatably mounted about the axis X on the primary element,
• a pendulum damping device with a holder and a pendulum, which has a rolling element and a flywheel which is mounted on the holder via the rolling element,
• a disengaging member adapted to maintain, in an engaged configuration, coupling of the secondary member to the retainer or, in a disengaged configuration, decoupling the secondary member from the retainer by rotating the retainer about the axis X with respect to the secondary member .

wherein the disengagement member is arranged to dispose the torsion damper in the disengaged configuration when the angle between the primary and secondary elements measured relative to a relative angular position of the primary and secondary elements at rest is about Axis X is greater than or equal to or less than a disengagement rash.

If one from an abrupt downshift (eg switching from type 5 - 2 ; Releasing the clutch pedal) is conducted to the torsional damper, the resulting angle between the primary and secondary elements about the axis X can reach the disengagement rash. The holder is then separated from the secondary element and can rotate about the axis X with respect to the secondary element. The impact between the rolling member and the holder is thus prevented. The life of the pendulum damping device is thereby significantly increased.

• - das Ausrückorgan ist sandwichartig zwischen dem sekundären Element und dem Halter angeordnet;
• - das sekundäre Element und der Halter drücken in der eingerückten Ausgestaltung das Ausrückorgan zusammen;
• - das Ausrückorgan ist so ausgebildet, dass der Übergang von der eingerückten Position in die ausgerückte Position durch elastische Verformung, vorzugsweise durch Biegung des Ausrückorgans erfolgt;
• - das Ausrückorgan ist um die Achse X drehfest mit dem sekundären Element verbunden und ist in der eingerückten Ausgestaltung mit dem Halter in Kontakt und von dem primären Element beabstandet und in der ausgerückten Ausgestaltung mit dem primären Element in Kontakt und vorzugsweise von dem Halter beabstandet;
• - das Ausrückorgan weist eine Eingriffseinrichtung und das primäre Element eine Aufnahmeeinrichtung für die Aufnahme der Eingriffseinrichtung in der ausgerückten Ausgestaltung auf, wobei die Aufnahmeeinrichtung so ausgebildet ist, dass durch den Eingriff der Eingriffseinrichtung in die Aufnahmeeinrichtung das Ausrückorgan elastisch verformt wird;
• - das Ausrückorgan ist eine Federscheibe mit der Achse X und die Eingriffseinrichtung vorzugsweise eine Lasche, die radial zum Äußeren der Federscheibe hervorsteht, und die Aufnahmeeinrichtung ist ein Vorsprung, der einen Vorsprungsitz zum Aufnehmen der Lasche definiert;
• - der Torsionsdämpfer weist ein Übertragungsorgan auf, das vorzugsweise starr am primären Element und/oder am sekundären Element befestigt und so ausgebildet ist, dass es eine elastische Kopplung zwischen dem primären und dem sekundären Element gewährleistet;
• - das Übertragungsorgan hat die Form einer elastischen Zunge, die von dem primären Element bzw. von dem sekundären Element gehalten wird und mit einem Anlageorgan zusammenwirkt, das von dem sekundären bzw. von dem primären Element gehalten wird;
• - das Übertragungsorgan hat die Form einer Schraubenfeder, die zwischen dem primären Element und dem sekundären Element angeordnet ist;
• - der Torsionsdämpfer weist zwei Aufnahmeeinrichtungen auf, die vorzugsweise zu einer axialen Ebene symmetrisch sind, wobei die axiale Ebene in der Ruhestellungsausgestaltung vorzugsweise eine Symmetrieebene der Eingriffseinrichtung ist; somit definieren die beiden Aufnahmeeinrichtungen jeweils in einer Drehrichtung um die Achse X und in einer entgegengesetzten Drehrichtung des primären Elements in Bezug auf das sekundäre Element einen Anschlag für das Ausrückorgan;
• - der Torsionsdämpfer ist aus einem Doppeldämpfungsschwungrad, einem hydrodynamischen Drehmomentwandler und einer Reibscheibe ausgewählt.

A torsional damper according to the invention may also comprise one or more of the following optional and preferred features:

• the disengagement member is sandwiched between the secondary member and the holder;
• - The secondary element and the holder press in the engaged embodiment, the release member together;
• - The release member is formed so that the transition from the engaged position to the disengaged position by elastic deformation, preferably by bending the Ausrückorgans takes place;
• - The release member is rotatably connected to the secondary element about the axis X and is in the engaged configuration in contact with the holder and spaced from the primary element and in the disengaged configuration with the primary element in contact and preferably spaced from the holder;
• - The release member has an engaging means and the primary element a Receiving means for receiving the engagement means in the disengaged configuration, wherein the receiving means is formed so that the disengagement member is elastically deformed by the engagement of the engagement means in the receiving means;
• the disengagement member is a spring washer with the axis X and the engaging means preferably a tab projecting radially to the exterior of the spring washer, and the receiving means is a projection defining a boss seat for receiving the tab;
• - The torsion damper has a transmission member, which is preferably rigidly attached to the primary element and / or the secondary element and designed so that it ensures an elastic coupling between the primary and the secondary element;
• the transfer member is in the form of a resilient tongue held by the primary element or by the secondary element and interacting with an abutment member held by the secondary or primary element respectively;
• - The transmission member is in the form of a helical spring, which is arranged between the primary element and the secondary element;
• - The torsion damper has two receiving devices, which are preferably symmetrical to an axial plane, wherein the axial plane in the rest position design is preferably a plane of symmetry of the engagement means; Thus, the two receptacles define in each case in a direction of rotation about the axis X and in an opposite direction of rotation of the primary element with respect to the secondary element, a stop for the release member;
• - The torsion damper is selected from a double-damping flywheel, a hydrodynamic torque converter and a friction disc.

The invention also relates to a motor vehicle which is equipped with a torsion damper according to the invention.

list of figures

• - 1 und 2 einen Torsionsdämpfer gemäß einem Ausführungsbeispiel der Erfindung in schematischen Teilansichten entlang der Achse X,
• - 3 den Torsionsdämpfer der 1 und 2 im Radialschnitt gemäß der Ebene A-A,
• - 4 den Torsionsdämpfer der 1 und 2 im Radialschnitt gemäß der Ebene B-B und
• - 5 und 6 jeweils eine Vergrößerung eines Teils des in 3 veranschaulichten Torsionsdämpfers.

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

• - 1 and 2 a torsional damper according to an embodiment of the invention in partial schematic views along the axis X,
• - 3 the torsion damper of 1 and 2 in radial section according to the plane AA,
• - 4 the torsion damper of 1 and 2 in radial section according to the plane BB and
• - 5 and 6 each an enlargement of part of the in 3 illustrated torsional damper.

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

definitions

• - bedeutet „axial“ „gemäß der Drehachse X des primären und des sekundären Elements“;
• - bedeutet „radial“ „gemäß einer die Achse X schneidenden Querachse“;
• - bedeuten „radial nach außen“ und „radial nach innen“ entlang einer radialen Richtung weg von der Achse X bzw. zur Achse X hin;
• - bedeutet „quer“ „in einer zur Achse X senkrechten Ebene“;
• - bedeutet „winkelmäßig“ oder „umfangsmäßig“ „um die Achse X“;
• - bedeutet „orthoradial“ „senkrecht zu einer radialen Richtung und in einer Querebene“;
• - ist unter „Querebene“ eine zur Achse X senkrechte Ebene zu verstehen;
• - ist unter „axialer Ebene“ eine Ebene zu verstehen, die die Achse X enthält;
• - bezieht sich die „Dicke“ eines Teil auf eine gemäß der Achse X gemessene Abmessung;
• - befindet sich in einer Ausgestaltung, in der kein Drehmoment zwischen dem primären Element und dem sekundären Element aufgebracht wird, der Torsionsdämpfer in der „Ruhestellung“;
• - sind unter „Kraftfahrzeug“ nicht nur Personenkraftwagen, sondern auch Nutzfahrzeuge zu verstehen, was insbesondere Schwerlastwagen, Fahrzeuge für den öffentlichen Verkehr oder landwirtschaftliche Fahrzeuge umfasst; und
• - sind „umfassen“, „beinhalten“ und „aufweisen“, sofern nicht anders angegeben, nicht einschränkend zu verstehen.

Unless otherwise stated

• - means "axially""according to the axis of rotation X of the primary and secondary elements";
• - means "radially""according to a transverse axis intersecting axis X";
• mean "radially outward" and "radially inward" along a radial direction away from the axis X and towards the axis X, respectively;
• - means "transverse""in a plane perpendicular to the axis X";
• - means "angular" or "circumferential""about the axis X";
• - "orthoradial" means "perpendicular to a radial direction and in a transverse plane";
• - "transverse plane" means a plane perpendicular to the axis X;
• - "axial plane" means a plane containing the axis X;
• - the "thickness" of a part refers to a dimension measured along the axis X;
• is located in a configuration in which no torque between the primary element and the secondary element is applied, the torsion damper in the "rest position";
• - 'motor vehicle' means not only passenger cars but also commercial vehicles, in particular heavy goods vehicles, public transport vehicles or agricultural vehicles; and
• - "comprise", "include" and "exhibit", unless otherwise specified, are not intended to be limiting.

Detailed description

As in the 1 to 4 illustrates has a torsion damper 10 a primary element 12 on, which is provided for attachment to the end of a crankshaft of an internal combustion engine, and a secondary element 14 , which is provided for connection to the drive shaft of a transmission.

The primary element has a primary garland 16 with a radially inner hub 18 with the axis X on whose base is an annular section 20 extends radially outward with the axis X. The primary element further includes an annular and toothed starter ring 22 attached to the radially outer surface of the primary rim.

The primary element has a receiving device 24 on, which is formed by a projection on the inner surface 26 of the primary ring is arranged, from which the hub protrudes radially. The projection may be integrally formed with the primary rim or rigidly secured to the primary rim. The secondary element has a secondary rim 28 on, which is also referred to as phase disc, is generally annular and has an axis X and one on the hub 18 and ball bearing mounted on the phase pulley 30 rotatably mounted about the axis X on the primary rim.

The secondary element also has at least one transfer element 32 on, about rivets 34 rigidly attached to the secondary wreath. In the illustrated example, the secondary element has two transmission elements, which are symmetrical with respect to the axis X.

The transfer member has the shape of a bent elastic tongue 36 that with an investment organ 38 interacts, which is held by the primary element. The elastic tongue may yield and transmit a torsional moment between the primary element and the secondary element, with the bending of the resilient tongue accompanied by relative rotation of the primary element and the secondary element relative to one another about the axis X. A torsion damper with such an elastic tongue is in the application FR 3 036 448 A1 and incorporated herein by reference.

The secondary element has an annular part 40 which is rigidly connected to the phase plate via rivets. In the illustrated example, the rivets sandwich and compress a stack formed from the phase plate, the transfer member, and the annular member.

The annular part has an annular groove 42 on whose cross-section in an axial plane is "U" -shaped. The annular groove thus defines a radially inner axial wall 44 , starting from which a lower radial wall 46 and an upper radial wall 48 extend radially outward. The lower or upper radial wall is disposed opposite to a surface of the primary rim or secondary rim. The lower radial surface is in contact with a radial surface of the elastic tongue.

The torsion damper further comprises a pendulum damping device 50 with a holder 52 with the axis X, which is coaxial with the primary and the secondary element and is generally annular. The pendulum damping device also has several pendulums 54 which, as illustrated, are preferably evenly distributed about the axis X.

Each pendulum includes a flywheel 56 , which consists of two rigidly connected pendulum weights, which extend on one side and on the other side of the holder, and at least one rolling element 58 , Which is arranged between the flywheel and the holder, that it rolls at a swinging movement of the flywheel with respect to the holder at least on a runway of the holder and on two flywheel tracks. The holder track is defined by the edge of a recess formed in the thickness of the holder, and the shuttle mass path is defined by the edges of depressions formed in the thickness of the pendulum weights of the flywheel. In the example illustrated, each pendulum comprises one flywheel and two rolling elements.

The pendulum damping device is received between the primary and the secondary rim. The holder in particular partially engages in the annular groove of the annular part.

The torsion damper also has a disengaging member 60 located between the primary element and the secondary element.

In the illustrated example, the disengagement member is a spring washer 62 with the axis X, which is generally annular and coaxial with the holder and with the primary and secondary elements.

The disengaging member is disposed in the torsion damper so as to orbit the hub while being spaced from the hub. The release member is arranged in particular between the holder and the annular part.

In the indented embodiment, in particular in the 4 to 5 is illustrated, the disengagement member abuts contact with the annular member on the secondary element and abuts the holder.

In the engaged configuration, the disengagement member is compressed by the secondary member and the holder so as to couple the holder and the secondary member, i. about the axis X rotatably connects.

The release member has a support surface 64 to press on the secondary element and a support surface 66 to press on the holder, which are arranged radially spaced from each other and, as in the 3 to 5 is shown, preferably arranged axially spaced from each other.

The disengagement member has an engagement device 68 on. In the illustrated example, the engagement means is formed by a tab which projects radially outward and, in the engaged configuration, is spaced from the primary member.

The disengagement member is adapted to be engaged by the engagement means in the disengaged configuration 68 with the receiving device 24 interacts as described below.

The engagement device and the receiving device are the rest position angularly at an angle Ω _b or "Ausrückausschlag" spaced apart. In other words, the primary element must be at least about the angle Ω _b rotate before the engaging means engages the receiving device. The Ausrückausschlag is preferably between Ωr -2 ° and Ωr -10 °, preferably between Ωr -2 ° and Ωr -5 °.

The angle Ωb is related to the deflection when switching back the double damping flywheel (here Ωr). $${\mathrm{\Omega }}_{\text{b}}=\mathrm{\Omega }\text{r}-5°\text{OR}{\mathrm{\Omega }}_{\text{b}}=\mathrm{\Omega }\text{r}-\text{x\% of}\mathrm{\Omega }\text{r}\text{,}$$

In the illustrated example, the primary element has receiving means in the form of four protrusions consisting of two pairs of protrusions, the protrusions of each pair being symmetrical to an axial plane.

Each projection has an inclined projection wall 69 which is spaced from the inner surface of the primary rim. The inclined projection wall defines with the primary rim a projection seat 72 for receiving the tab.

The inclined projection wall is preferably inclined so that the gap between the inclined projection wall and the primary ring with increasing engagement of the engagement means 68 , ie the tongue in the projection seat 72 reduced.

In the engaged embodiment, the holder and the disengagement member are rotatably connected about the axis X. When a torque is applied to the primary element, the secondary element is rotatable about the axis X with respect to the primary element. Beyond an angle between the primary and secondary elements about the axis X, which is greater than or equal to the disengaging rash, as measured relative to the relative angular position of the elements in the rest position, the tab engages the protrusion seat.

The protrusion is formed such that when the angle between the primary and secondary elements about the axis X reaches the disengagement rash, the protrusion exerts an axial force on the flap directed in the same direction as the force that the holder exerts on the spring washer.

As in 5 is illustrated, the tab has a flat and parallel to a transverse plane end portion 74 on. If the tab 68 in the boss seat 72 is engaged, the end portion of the tab on the inclined projection wall 69 in Appendix. By increasing the angle between the primary and secondary elements about the axis X, the tab follows the slope of the sloped projection wall and approaches the inner surface 26 of the primary wreath. The axial displacement of the tab is accompanied by an elastic deflection of the spring washer, as in 5 through the arrow F is indicated, which leads to a reduction of the pressure of the spring washer on the holder and even to a loss of contact between the holder and spring washer. The torsion damper is then in the disengaged configuration. The pendulum damping device is thus decoupled from the secondary element and can rotate with respect to the secondary element about the axis X, whereby the impact of the rolling elements on the holder is reduced, even prevented.

In the disengaged configuration in which the disengagement rash is achieved, the resilient tongues are elastically deformed and return the primary member to return the torsion damper to the rest position. The angle between the primary and secondary elements about the axis X is then reduced and becomes smaller than the disengagement rash. Since the disengagement member is rigidly connected to the secondary member, the tab is then moved away from the protrusion seat, and the disengagement organ resumes its initial position by elastic return. The holder and the secondary element are then coupled again.

As can now clearly be seen, the invention provides a solution for limiting the risk of breakage of oscillating pendulum masses.

The life of the torsion damper is thereby increased.

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

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

• FR 3036448 A1 [0019]

Claims (10)

Torsion damper (10), which is in particular intended to be integrated in a motor vehicle transmission chain, wherein the torsion damper comprises: a primary element (12) and a secondary element (14) rotatably mounted about the axis X on the primary element, - a pendulum damping device (50) with a holder (52) and a pendulum (54) having a rolling member (58) and a flywheel (56) which is mounted on the holder swinging about the holder, a disengaging member (60) adapted to maintain, in an engaged configuration, a coupling of the secondary element to the holder, or in a disengaged configuration, to maintain the secondary element by rotating the holder about the axis X with respect to the secondary element of FIG the retainer is configured to locate the torsional damper in the disengaged configuration when the angle between the primary and secondary relative to a relative angular position of the primary and secondary elements in the rest position is selected Element about axis X is greater than or equal to or less than a disengagement rash. Torsionsdämpfer after Claim 1 in which the disengagement member is sandwiched between the secondary member and the holder. Torsionsdämpfer after one of Claims 1 and 2 in which the secondary element and the holder in the engaged configuration compress the release member. Torsionsdämpfer according to any one of the preceding claims, wherein the Ausrückorgan is formed so that the transition from the engaged position to the disengaged position by elastic deformation, preferably by bending the Ausrückorgans takes place. A torsional damper as claimed in any one of the preceding claims, wherein the disengagement member is rotationally connected about the axis X to the secondary member and in the engaged configuration is in contact with and spaced from the primary member and in contact with the primary member in the disengaged configuration is. A torsional damper as claimed in any one of the preceding claims, wherein the disengagement member comprises an engagement means (68) and the primary member comprises a receiving means (72) for receiving the engagement means in the disengaged configuration, the receiving means being adapted to be engaged by the engagement of the engagement means the receiving device, the disengagement member is elastically deformed. A torsional damper as claimed in any one of the preceding claims, wherein the disengagement member is a spring washer with axis X and the engagement means is preferably a tab projecting radially to the exterior of the spring washer, and wherein the receiving means is a protrusion having a protrusion seat for receiving the tab Are defined. A torsional damper according to any one of the preceding claims, further comprising a transmission member adapted to provide a resilient coupling between the primary and secondary members. A torsional damper according to any one of the preceding claims, selected from a dual damping flywheel, a hydrodynamic torque converter and a friction disc. Motor vehicle equipped with a torsion damper according to the preceding claim.

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