DE102009032351A1 - Two-mass flywheel for absorbing torsional vibrations of drive train of motor vehicle, is provided with primary flywheel mass and secondary flywheel mass - Google Patents

Abstract

The two-mass flywheel (1) is provided with primary flywheel mass (3) and a secondary flywheel mass (9). An allocation unit is provided, with which the primary flywheel mass and the secondary flywheel mass are limited with relative motions from a neutral position in a thrust direction. The allocation unit has drivers (2,5) and a spring damping device (10).

Description

The The invention relates to a dual mass flywheel for damping of torsional vibrations, with a first turning mass, a second Rotating mass and an allocation unit, which the first rotating mass the second rotating mass in relative movements from a neutral position in a thrust direction and a direction of pull opposite to the direction of thrust limited federgedämpft and relatively rotatable assigns.

Dual mass flywheels of the type mentioned are known. They can be used for damping torsional vibrations, as occur, for example, in a drive train of a motor vehicle with an internal combustion engine. For this purpose, the rotational masses of the dual-mass flywheel may be associated with one another by means of curved coil springs mounted in a spring housing. The DE 195 22 718 A1 shows a torque transmission device which is effective in connection with a friction clutch and discloses a flange-like component for acting on energy accumulators which are arranged concentrically around the axis of rotation of the component.

task The invention is to provide an improved and / or alternative dual-mass flywheel.

The Task is with a dual mass flywheel for damping of torsional vibrations, with a first turning mass, a second Rotating mass and an allocation unit, which the first rotating mass the second rotating mass in relative movements from a neutral position in a thrust direction and a direction of pull opposite to the direction of thrust limited spring-damped and relatively rotatable assigns, solved in that the allocation unit at least one Handlebar and at least one of the handlebar spring-damper assigned Has spring damper device. Can be advantageous by means of the handlebar of the allocation unit precise forces for damping the torsional vibrations between the first rotating mass and the second rotating mass are transmitted. The allocation unit So is to transmit a torque between the first Rotary mass and the second rotating mass designed, this transmission spring-damped and thus torsional vibrations between the first rotating mass and the second rotating mass damping are.

at an embodiment of the dual mass flywheel is provided that the at least one handlebar by means of at least one Swivel joint is associated with one of the rotating masses. By means of the torque can the handlebar to a fixed by means of the rotary joint axis of rotation be pivoted and thus between the first rotating mass and the second torque transmitted torques introduce the swivel joint into one of the rotating masses.

at a further embodiment of the dual mass flywheel is provided that the at least one handlebar a variable length has and by means of another rotary joint of the other rotating mass assigned. Advantageously, by means of the length variation of the handlebar spring damping done. Under spring damper device can be any device with elastic properties and / or attenuating properties are understood, for example a spring and any elastic element and / or a pure damping element, for example, a friction device. It is possible that the spring damper device in extreme cases, an ideal spring represents, that has a damping rate of zero or an ideal damper that does not have any elastic properties having.

at a further embodiment of the dual mass flywheel it is provided that the spring damper device at least an element of the following group: a linear spring damper unit, a torsion spring damper unit, a linear spring, a torsion spring, a linear damper, a rotary damper. Advantageous can use the spring damper unit movements the rotating masses to each other and / or pivoting movements of at least a handlebar and / or changes in length of at least a handlebar are spring-damped. The handlebar can, for example as a gas spring and / or oil pressure shock absorbers be executed.

at a further embodiment of the dual mass flywheel it is provided that the at least one link by means of the linear spring damper unit the other rotational mass is assigned. Can be advantageous by means of Linearfederdämpfereinheit resulting changes in length between the swivel joint and the other swivel joint that is made the relative rotational movement of the rotating mass results, spring-damped be, wherein advantageously the first rotary mass spring-damped with the second rotating mass can be coupled.

In a further exemplary embodiment of the dual-mass flywheel, it is provided that a first link is assigned to the second link by means of a first rotary joint of the first rotary mass, a second link by means of a second rotary joint of the second rotary mass, and the first link is connected to the second link by means of a third rotary joint. Advantageously results in a triangular-shaped linkage arrangement, wherein the coupling of the rotating masses by means of the two links and the three associated pivot joints out and can be done in a precise manner. The An Order has only one degree of freedom, which can be spring-damped in a simple manner, wherein advantageous thereby also the relative rotational movement of the rotating masses can be spring-damped.

at a further embodiment of the dual mass flywheel it is provided that the rotating masses arranged coaxially with each other are and the first pivot radially outside the second Swivel joint is arranged. In a relative twisting movement the first rotating mass to the second rotating mass can So the first and the second pivot radially through each other turn, said by means of the coupling means of the two links said Degree of freedom of the arrangement of the handlebars and the swivel joints remains.

at a further embodiment of the dual mass flywheel is provided that the spring damper device a Counteracts rotational movement of the first, second and / or third rotary joint. Advantageously, the spring damper device on at least one of the hinges act spring-damping, by means of Steaming the remaining one degree of freedom also torsional vibrations between the first and second rotating mass are damped.

at a further embodiment of the dual mass flywheel is provided that the first and the second pivot in the Neutral position on a common radius or radius line lie, the first and the second handlebar along the common Radius line are aligned and the third pivot radially within the first and second pivot joint is located. Can be advantageous out of this rotational position in the direction of pulling and pushing the handlebars be brought into an angle to each other, in which case the third rotary joint moved at least as far radially outward, until the two handlebars are once again in line, namely on a connecting line of the first and second pivot joints. In this position, advantageously, a further twisting movement the rotating masses are limited. Alternative and / or additional However, it is conceivable, the rotational movement of the rotating mass means a stop between the rotating masses and / or a stop, which is associated with at least one of the swivel joints to limit.

at a further embodiment of the dual mass flywheel it is provided that the first and the second link and the first, second, third rotary joint to form a swivel joint, with a Variety of such rotary joints is provided. Advantageous Can a spring damper rate for damping the torsional vibrations be multiplied according to the number of swivel joints.

at a further embodiment of the dual mass flywheel is provided that in each case the third rotary joints of the plurality the swivel joint by means of at least one of the Linearfederdämpfereinheiten coupled together. Advantageously increased when turning the rotary masses out of the neutral position a distance of the third pivot joints, these being from the neutral position out radially outward. This can be beneficial Distance change by means of the linear spring damper unit or a plurality of such linear spring damper units be spring-damped, being about the forced coupling by means of the handlebars a torsional vibration damping of the rotating masses results.

at a further embodiment of the dual mass flywheel is provided that the first link to the second link means associated with the linear spring damper unit. Advantageous can by means of the associated Linearfederdämpfereinheit the in a rotational movement of the rotating masses by means of the forced coupling occurring angle change of the link spring-damped become. It is possible, ends of the Linearfederdämpfereinheit to associate the drivers on a radially different level, so that the linear spring damper unit between the allocation points can slide through during a rotational movement of the rotating masses. there it is conceivable, at least one allocation point of the linear spring damper unit at one of the swivel joints, for example the first or second Rotary joint, provide and another assignment point to the each not by means of the rotary joint mounted handlebars. through The assignment to one of the swivel joints is the linear spring damper unit ultimately assigned to the corresponding rotating mass and opposite the not mounted by means of this pivot bearing handlebars. A change in length the spring damper unit is due to the change in angle the handlebars to each other, thereby advantageously damped is. Advantageously, the two links associated with each other be whose angular change by means of the Linearfederdämpfereinheit is dampened and thus also by means of forced coupling a rotational movement of the rotating masses relative to each other.

at a further embodiment of the dual mass flywheel is provided that the plurality of swivel joints by means of at least one of the Linearfederdämpfereinheiten together is coupled. Advantageously, these can be spring-damped.

The object is also with a drive train arrangement of a motor vehicle with a previously described two-mass flywheel solved. This results in the advantages described above. A drive train arrangement can be understood to mean a part of a drive train of a motor vehicle or a complete one, for example a transmission with a dual mass flywheel, an engine with a dual mass flywheel and / or an engine, a dual mass flywheel, a transmission and / or the entire drive train.

The Task is further with a motor vehicle with a previously described Drive train arrangement solved. It results in the advance described advantages.

Further Advantages, features and details emerge from the following Description, in reference to the drawing, an embodiment is described in detail. Same, similar and / or functionally identical parts are provided with the same reference numerals. Show it:

1 a dual mass flywheel having a first rotating mass and a second rotating mass coupled together by four rotary joints and four linear spring damper units;

2 this in 1 shown dual mass flywheel, wherein only by means of three linear spring damper units coupled rotary joints are provided;

3 that in the 1 and 2 shown dual mass flywheel, wherein only two coupled by means of a single linear spring damper unit pivot joint are provided;

4 another dual-mass flywheel and two rotating masses, which are coupled to each other by means of a total of four rotary joints, wherein links of the swivel joint are coupled by means of Linearfederdämpfereinheiten;

5 this in 4 shown dual mass flywheel, wherein only three swivel joints are provided;

6 that in the 4 and 5 shown dual mass flywheel, wherein only two of the swivel joints are provided;

7 another dual mass flywheel analogous to the dual mass flywheel from the 4 to 6 wherein another assignment of the linear spring damper unit is provided;

8th this in 7 shown dual mass flywheel, wherein only three swivel joints are provided and

9 that in the 7 and 8th shown dual mass flywheel, wherein only two swivel joints are provided and an alternative with a handlebar and a spring damper unit connected in series.

The 1 to 3 each show a dual mass flywheel 1 , where in 1 a total of four swivel joints 2 , in 2 three swivel joints 2 and in 3 two swivel joints 2 are provided. The dual mass flywheel 1 has a first flywheel 3 on. The first flywheel 3 is about a first pivot 4 , a first handlebar 5 , a third pivot 6 , a second handlebar 7 as well as a second swivel joint 8th that the swivel joints 2 form, a second flywheel 9 assigned. The swivel gearbox 2 , in 1 four each, in 2 three pieces each, in 3 two pieces each, couple the first flywheel 3 with one degree of freedom so with the second flywheel 9 that the momentum 3 . 9 relative to each other and can be limited twisted. The relative rotatability of the flywheels 3 . 9 is by means of the handlebars 5 . 7 limited, namely, when they are arranged on an imaginary straight line behind each other, so that the first pivot 4 and the second pivot 8th can not move further apart. The swivel joints 4 . 8th lie on the imaginary line.

The means of the three hinges 4 . 8th . 6 and the handlebars 5 . 7 given kinematics of the swivel gear is designed so that the handlebars 5 . 7 in a neutral position that the momentum masses 3 . 9 can assume each other on an imaginary radius line, starting from a rotation axis 11 , lie radially outward. In this neutral position are the first handlebar 5 , the second handlebar 7 , the first swivel 4 , the second pivot 8th as well as the third swivel joint 6 together on the imaginary radius line, starting from the axis of rotation 11 , In the neutral position so the handlebars 5 . 7 radially inward in the direction of the axis of rotation 11 of the dual mass flywheel 1 , The third pivot is closest to the axis of rotation 11 , radially above the second pivot 8th and radially above this, the first pivot 4 , The first handlebar 5 is according to the distance of the first Drehge steering 4 to the second pivot 8th , which they take in the neutral position, longer than the second handlebar 7 ,

It can be seen that a twisting movement of the first flywheel 3 relative to the second flywheel 9 in a thrust direction as well as in an opposite direction of pull, which in 1 by means of a double arrow 12 are indicated, a pivoting of the first link 5 relative to the second link 7 around the third pivot 6 at an angle 13 causes. The angle 13 is in the neutral position of the dual mass flywheel 10 Degree and in a maximum deflection in the thrust direction, or tensile direction, +180 degrees, or -180 degrees. It can be seen that at an increase in the angle 13 the third pivot 6 , or in each case the third rotary joint 6 of the associated swivel gear 2 moved radially outward, resulting in 1 by means of an arrow 14 is indicated. Another pivoting movement of the handlebars 5 . 7 beyond a dead center of +/- 180 degrees is possible.

Related to 1 Thus, a total of four of the third pivot joints move at a deflection of the flywheels 3 and 9 radially outward, with a distance between the third pivot joints 6 is enlarged. This by means of the swivel joint 2 at a rotation of the flywheels 3 and 8th Forced movement can be advantageous for damping the rotational movement of the flywheels 1 and 9 be exploited relative to each other. These are the third swivel joints 6 by means of a spring damper device 10 associated with each other.

As shown in 1 has the spring damper device 10 a total of four linear spring damper units 15 on. The linear spring damper units 15 are arranged in the form of a square to each other, wherein the vertices of the third pivot joints 6 the four swivel gearbox 2 form. The linear spring damper units 15 can have any elastic elements, such as coil springs, which are loaded on train or pressure. In extreme cases, it can only be a spring, but it is also possible that the linear spring damper units have a special damper device, for example in the form of a gas spring and / or an oil pressure shock absorber.

As shown in 2 are a total of three third swivel joints 6 leading to three rotary joints 2 belong, in the form of an equilateral triangle by means of Linearfederdämpfereinheiten 15 connected with each other. This results in the same functionality.

In 3 are a total of two of the third pivot joints 6 the associated two swivel joint 2 by means of a single linear spring damper unit 15 coupled together. This results in the same functionality.

The 4 to 9 show further embodiments of dual mass flywheels 1 , which by means of differently numerous provided rotary joints 2 are positively coupled with each other. In the following, only the differences to the representation according to the 1 to 3 received. According to 4 are a total of four swivel joints 2 intended. According to 5 are a total of three of the swivel joint 2 intended. According to 6 are a total of two of the swivel linkage 2 intended. In contrast to the representation according to the 1 to 3 is at the 4 to 6 a spring damper device 10 provided at the per swivel joint 2 a linear spring damper unit 15 is provided, each of the first pivot 4 and the second handlebar 7 is assigned approximately centrally. It can be seen that due to the forced coupling of the handlebars 5 and 7 an adjustment of the flywheel masses 3 and 9 from the neutral position, an extension of the Linearfederdämpfereinheiten 15 causes. Advantageously, in this way also the centrifugal masses 3 and 9 are torsionally damped.

The 7 to 9 each show more dual-mass flywheels 1 , analogous to 1 to 3 , respectively 4 to 5 , in which only the differences are discussed below.

In contrast to the representation according to the 4 to 6 , are the linear spring damper units 15 per swivel joint 2 in each case the second pivot 8th and the first handlebar 5 each assigned in the middle. Per swivel joint 2 is in each case a linear spring damper unit 15 intended. It can be seen that also in this arrangement, the Linearfederdämpfereinheiten 15 at a relative rotational movement of the flywheels 3 and 9 from its neutral position, an extension of the Linearfederdämpfereinheiten 15 occurs, which is advantageous for damping of torsional vibrations of the flywheel masses 3 . 9 can be exploited.

It is conceivable that in the 1 to 9 shown embodiments to combine with each other to new embodiments.

In 9 In addition to the two swivel joints, this is an optional allocation unit 16 with a third handlebar 17 and one of these in-line linear spring damper unit 18 located. The order 16 may be provided optionally or additionally. The order 16 has a fourth pivot 19 on, by means of which the third link 17 swiveling the first flywheel 3 of the dual mass flywheel 1 assigned. The linear spring damper unit 18 is by means of a fifth hinge 20 the second flywheel 9 assigned. It is conceivable, instead of the third link 17 only the linear spring damper unit 18 between the swivel joints 20 and 19 provided. It is also conceivable, in this configuration, the third link 17 and the linear spring damper unit 18 to combine with each other so that they realize a handlebar and a spring-damping allocation unit in a component, for example in the form of a Gasfe and / or an oil pressure shock absorber.

It can be seen that in this arrangement, a torsional vibration damping of the flywheel masses 3 and 9 can be done. Alternatively or additionally, at least one of the swivel joints 4 . 8th . 6 and or 19 at least one torsional vibration damper unit 21 be assigned. Advantageously, by means of the at least one torsional vibration damper unit 21 the degree of freedom of the rotary joint gear are damped, which ultimately leads to an advantageous torsional vibration damping of the flywheel masses 3 and 9 leads.

The in the 1 to 9 illustrated dual mass flywheels 1 may be part of a drive train arrangement or a drive train of a partially illustrated motor vehicle only partially shown. The dual-mass flywheel may, for example, be connected between an internal combustion engine of the motor vehicle and a dry clutch with a subsequent transmission. LIST OF REFERENCE NUMBERS 1 Dual Mass Flywheel 2 Swivel gear 3 first flywheel 4 first rotary joint 5 first handlebar 6 third pivot 7 second handlebar 8th second pivot 9 second flywheel 10 Spring damper device 11 axis of rotation 12 double arrow 13 angle 14 arrow 15 Linear spring damper unit 16 allocation unit 17 third handlebar 18 Linear spring damper unit 19 Fourth swivel 20 fifth pivot 21 A torsional vibration damper unit

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• - DE 19522718 A1 [0002]

Claims (15)

Dual mass flywheel ( 1 ) for damping torsional vibrations, comprising: - a first rotating mass ( 3 ), - a second rotating mass ( 9 ) and - an allocation unit, which the first rotating mass ( 3 ) of the second rotating mass ( 9 ) is limited in relative movements from a neutral position in a thrust direction and a direction opposite to the thrust direction pulling direction, spring-damped and relatively rotatable assigns, characterized in that the allocation unit ( 16 ) at least one handlebar ( 5 . 2 ; 17 ) and at least one of the handlebars ( 5 . 7 ; 17 ) Spring-damper associated spring damper device ( 10 ) having. Dual-mass flywheel according to the preceding claim, characterized in that the at least one link ( 5 . 7 ; 17 ) by means of at least one rotary joint ( 19 . 20 ) one of the rotating masses ( 3 . 9 ) assigned. Dual-mass flywheel according to the preceding claim, characterized in that the at least one link ( 5 . 7 ; 17 ) has a variable length and by means of another rotary joint ( 19 . 20 ) of the other of the rotating masses ( 3 . 9 ) assigned. Dual mass flywheel according to one of the preceding claims, characterized in that the spring damper device ( 10 ) comprises at least one element of the following group: a linear spring damper unit ( 15 ), a torsion spring damper unit ( 21 ), a linear spring, a torsion spring, a linear damper, a rotary damper. Dual-mass flywheel according to one of the preceding three claims, characterized in that the at least one link ( 5 . 7 ; 17 ) by means of the linear spring damper unit ( 15 ; 18 ) of the other rotating mass ( 3 . 9 ) assigned. Dual mass flywheel according to one of the preceding claims, characterized in that a first link ( 5 ) by means of a first rotary joint ( 4 ) of the first rotating mass ( 3 ), a second handlebar ( 7 ) by means of a second rotary joint ( 8th ) of the second rotating mass ( 9 ) and the first handlebar ( 5 ) the second link ( 7 ) by means of a third rotary joint ( 6 ) assigned. Dual-mass flywheel according to the preceding claim, characterized in that the rotating masses ( 3 . 9 ) are arranged coaxially to each other and the first pivot ( 4 ) radially outside of the second pivot ( 8th ) is arranged. Dual mass flywheel according to one of the preceding claims, characterized in that the spring damper device ( 10 ) a rotational movement of the first, second and / or third rotary joint ( 4 . 6 . 8th ) counteracts. Dual-mass flywheel according to one of the preceding claims, characterized in that the first and the second rotary joint ( 4 . 8th ) lie in the neutral position on a common radius line, the first and the second link ( 5 . 7 ) are aligned along the common radius line and the third pivot ( 6 ) radially within the first and second pivot joints ( 4 . 8th ) lies. Dual-mass flywheel according to one of the preceding claims, characterized in that the first and the second link ( 5 . 7 ) and the first, second, third pivot ( 4 . 8th . 6 ) a swivel joint ( 2 ), wherein a plurality of such swivel joints ( 2 ) is provided. Dual-mass flywheel according to one of the preceding claims, characterized in that in each case the third rotary joints ( 6 ) of the plurality of swivel joints ( 2 ) by means of at least one of the linear spring damper units ( 15 ) are coupled together. Dual-mass flywheel according to one of the preceding claims 6 to 10, characterized in that the first link ( 5 ) the second link ( 7 ) by means of the linear spring damper unit ( 15 ) assigned. Dual-mass flywheel according to one of the preceding claims, characterized in that the plurality of swivel joints ( 2 ) by means of at least one of the linear spring damper units ( 15 ) are coupled together. Drive train arrangement of a motor vehicle with a dual-mass flywheel ( 1 ) according to any one of the preceding claims. Motor vehicle with a drive train arrangement after the preceding claim.