Source: https://patents.google.com/patent/DE102016212974A1/en
Timestamp: 2020-04-06 19:46:27
Document Index: 622397642

Matched Legal Cases: ['art 4', 'art 4', 'art 5', 'arts 16', 'art 17', 'arts 16', 'art 17']

DE102016212974A1 - A torsional vibration damper - Google Patents
DE102016212974A1
DE102016212974A1 DE102016212974.0A DE102016212974A DE102016212974A1 DE 102016212974 A1 DE102016212974 A1 DE 102016212974A1 DE 102016212974 A DE102016212974 A DE 102016212974A DE 102016212974 A1 DE102016212974 A1 DE 102016212974A1
DE102016212974.0A
2016-07-15 Application filed by Schaeffler Technologies AG and Co KG filed Critical Schaeffler Technologies AG and Co KG
2016-07-15 Priority to DE102016212974.0A priority Critical patent/DE102016212974A1/en
2018-01-18 Publication of DE102016212974A1 publication Critical patent/DE102016212974A1/en
The invention relates to a torsional vibration damper (1), in particular centrifugal pendulum (2) with at least two distributed over the circumference and limited in the circumferential direction displaceable on a Tilgermassenenträger (3) rotatably arranged about a rotational axis (d) absorber masses (6). In order to prevent asynchronous individual excitation of absorber masses (6), in particular under the influence of gravity, the at least two absorber masses (6) are synchronized with one another in the circumferential direction with play.
The invention relates to a torsional vibration damper, in particular centrifugal pendulum with at least two distributed over the circumference and in the circumferential direction limited displaceable on an absorber mass carrier rotatably mounted about a rotational axis arranged absorber masses.
Torsional vibration absorbers are used in particular in drive trains of motor vehicles with a torsionally vibrating internal combustion engine of the torsional vibration isolation. Here have so-called, for example from the DE 196 52 730 A1 known conventional torsional vibration damper distributed over the circumference arranged absorber masses which are connected by means effective in the circumferential direction spring elements with the absorber mass carrier. Due to their operating principle, these torsional vibration dampers are designed for a fixed absorber frequency. Furthermore, for example, from the documents DE 10 2010 010 674 A1 and DE 10 2014 217 461 A1 Drehschwingungstilger known which are designed as so-called centrifugal pendulum whose absorber masses are added displaceably on predetermined pendulum tracks and accelerated radially outward in the centrifugal force field of the rotating absorber mass carrier, which absorb at occurring torque peaks energy by displacement on the pendulum tracks against the action of centrifugal radially inward , As a result, a torsional vibration damper is formed with speed-adaptive Tilgerfrequenz. Due to external influences, such as centrifugal force oscillations by gravity, the absorber masses can oscillate asynchronously to each other. This reduces the quality of the repayment process.
The object of the invention is the development of a generic torsional vibration damper. In particular, object of the invention to provide a torsional vibration damper with improved Tilgerwirkung.
The object is solved by the subject matter of claim 1. The dependent of the claim 1 claims give advantageous embodiments of the subject matter of claim 1 again.
The proposed torsional vibration damper, in particular a centrifugal pendulum, has an absorber mass carrier rotatable about an axis of rotation, for example a crankshaft of the internal combustion engine or a transmission input shaft of a transmission and rotationally driven, on which at least two absorber masses distributed over the circumference and limitedly displaceable in the circumferential direction are received. The torsional vibration damper can form a torsional vibration isolation device on its own or in conjunction with further torsional vibration absorbers and / or torsional vibration dampers. For example, the proposed torsional vibration damper for this purpose may be included in a dual-mass flywheel, a clutch disk of a friction clutch, in the friction clutch itself, in or outside a hydrodynamic torque converter or the like.
To improve the quality of the proposed torsional vibration damper, the at least two absorber masses are synchronized with one another in the circumferential direction with play. This means that the displacement of the absorber masses in the circumferential direction, for example, the absorber masses of a conventional torsional vibration damper along their displacement in the direction of action of the spring elements or the absorber masses like pendulum masses of a centrifugal pendulum along a predetermined by the pendulum tracks of absorber mass pendulum motion over a predetermined swing angle after consumption of a predetermined game forced is. Such guidance as synchronizing the absorber masses avoids or reduces at least an asynchronous excitation of the absorber masses, for example by gravity and / or during operation of the internal combustion engine outside a designed excitation order, for example, in an operation of an internal combustion engine with four cylinders on the four-stroke principle with two cylinders at laid out Energizer trim one of torsional vibration damper.
For example, the synchronization with play can be provided by means of a guide element, which is arranged around the axis of rotation of the torsional vibration damper and in each case with play, engages in the absorber masses radially inward.
The guide element can be centered about the axis of rotation or floating and optionally rotatably mounted, for example, on a hub disposed about the axis of rotation or with respect to the Tilgermassenträger. To form an additional to the set game in the circumferential direction rotatable mounting of the absorber masses relative to the guide element corresponding joints between the guide element and absorber masses may be provided. For example, preferably radially formed spokes may be provided between the absorber masses and the guide element. The joints can be formed between the guide element and the spokes, wherein each spoke is fixed as rigidly connected to a damping mass. Alternatively, the spokes may be fixed, for example, integrally connected to the guide element, wherein in each case a joint between a spoke and an absorber mass is formed. For this purpose, the spoke can radially into a corresponding recess of an absorber mass playful engreifen. Finally, the joints can be housed within split spokes.
According to an advantageous embodiment of the torsional vibration damper, the absorber masses can be accommodated pendulum masses as pendulum masses along predetermined pendulum paths on the absorber mass carrier. In a trained on this centrifugal pendulum absorber masses serve by alignment in the centrifugal force field of the rotating about the axis of rotation Tilgermassenträgers such as pendulum mass carrier and by torsional vibration from this position radially inwardly to a smaller radius forced pendulum masses of vibration damping. The pendulum movement can be provided by complementarily formed raceways on the absorber mass carrier and on the absorber masses. In the simplest case, the pendulum motion can be modeled on a monofilar suspended pendulum. In this case, an absorber mass can roll by means of its career directly on the associated career of the absorber mass carrier. Alternatively, a parallel or trapezoidal bifilar suspension of a pendulum or a freeform of a pendulum motion can be reproduced by means of two circumferentially spaced pendulum bearings per absorber mass. Here, a pendulum bearing may be formed of complementarily formed in recesses of Tilgermassenträgers and absorber masses tracks which are formed axially adjacent to each other, wherein a storage of absorber masses against the absorber mass carrier by means of a recesses which crosses, rolling on the raceway rolling elements, such as a spherical roller is taken.
Such torsional vibration absorbers may have a Tilgermassenenträger designed as a pendulum flange, on both sides Tilgermassenteile are arranged.
Axially opposite Tilgermassenteile here are connected to each other by means of corresponding recesses of the pendulum flange by cross-connecting means to each Tilgermasse. The synchronous play-related coupling of the absorber masses may be provided on a single or on both parts of a Tilgermassentilen an absorber mass.
In an alternative embodiment, the Tilgermassenträger may be formed of two radially inwardly and / or radially outside the absorber masses interconnected disc parts, wherein the two disc parts receive distributed over the circumference arranged absorber masses axially between them. For this purpose, the disk parts each have two axially opposite, similar recesses with raceways, which form a self-aligning bearing with a raceway of a recess in the absorber mass and a roller body which projects over the recesses and rolls on the raceways, such as a spherical roller. The absorber masses provided for this purpose can be formed in one piece, with the guide element or a spoke operatively connected thereto engaging radially inward into a recess of the absorber mass. Alternatively, the absorber masses may be formed in several parts, for example, formed of axially layered discs such as metal discs. Here, a middle disc may have a corresponding recess for an engaging spoke or another component of the guide element.
The formation of the joints provided in the guide element or in the absorber masses can be done depending on the formation of the pendulum motion. For example, the absorber masses such as pendulum masses along a displacement on the pendulum tracks opposite the absorber mass carrier may be partially rotatably received about its center of gravity, the joints allow a rotational clearance of the pendulum masses. For this purpose, it is possible in the circumferential direction to preferably provide studs or cams on both sides, so that spokes or the like engaging in the recesses of the guide element or recesses of the absorber masses permit rotational play in addition to the circumferential play. Alternatively, the recesses in the radial direction may have substantially smooth contact surfaces with respect to the spokes, wherein the spokes may have, for example, contact surfaces which are in the shape of a circle or cam in the circumferential direction. In an embodiment which has been expanded to this end, the recesses in the absorber masses can be widened radially outward or radially inward in the guide element, so that the circumferential clearance of the synchronization increases from a zero position of the absorber masses to the maximum oscillation angle depending on the oscillation angle of the absorber masses. This means that the game is set variably depending on a position on the pendulum track and is preferably minimal at a zero position of the pendulum masses.
The rigid or articulated receiving the spokes on the absorber masses may be provided in a preferred manner on the circumference of the center of gravity. This means that, based on the zero position of an absorber mass, the spokes are arranged on a line between the axis of rotation of the absorber mass carrier and the center of gravity of a respective absorber mass.
The predetermined game causes a predetermined clearance angle, within which the pendulum masses such as absorber masses of a centrifugal pendulum freely against each other are displaced. The clearance angle is limited to a tolerance of less than 50% of the maximum oscillation angle. Preferably, the intended clearance angle is less than 25% of the maximum swing angle, in particular less than 10% and ideally less than 2% of the maximum swing angle of the pendulum masses along the pendulum tracks.
The guide element and / or the spokes may be stamped from sheet metal or made of plastic, for example by means of an injection molding process.
In conventional absorber masses or absorber masses designed as pendulum masses, the absolute clearance between a contact region of the guide element and the absorber masses may be less than 20 mm, preferably less than 10 mm, in particular less than 5 mm and ideally less than 2 mm.
For example, in order to prevent displacement of the absorber masses of a centrifugal pendulum which are arranged radially above the axis of rotation when the absorber mass carrier is stationary or slowly rotating and the centrifugal force is negligible, the absorber masses can be elastically supported radially inwardly by radially acting spring elements, for example helical compression springs, torsion springs, leaf springs or the like. Preferably, helical compression springs can be arranged around the spokes.
The invention is based on the in the 1 to 10 illustrated embodiments explained in more detail. Showing:
1 a torsional vibration damper in view in schematic representation,
2 the torsional vibration damper the 1 along the section line AA,
3 the torsional vibration damper the 1 and 2 along the section line BB,
4 the torsional vibration damper the 1 to 3 along the section line CC,
5 one opposite the torsional vibration damper of 1 to 4 modified torsional vibration damper in view in schematic representation,
6 a detail of one opposite the torsional vibration absorbers of 1 to 5 modified torsional vibration damper with absorber mass arranged in zero position,
7 the detail of the torsional vibration damper of 6 at maximum oscillation angle,
8th a torsional vibration damper with respect to the absorber masses of the torsional vibration damper 1 to 7 modified absorber masses,
9 a detail of a relative to the torsional vibration damper 1 to 4 modified torsional vibration damper with radially elastically supported absorber masses
10 a detail of a relative to the torsional vibration damper 5 modified torsional vibration damper with radially elastically supported absorber masses.
The 1 to 4 show in the synopsis as a centrifugal pendulum 2 trained torsional vibration damper 1 in schematically represented view ( 1 ) and various partial sections along the section line AA ( 2 ), along the section line BB ( 3 ) and along the section line CC ( 4 ), where in 1 a lateral side part 4 of the absorber mass carrier 3 is removed.
The Tilgermassenträger 3 is rotatably disposed about the axis of rotation d and takes here four distributed over the circumference arranged absorber masses 6 pendulum on. The absorber masses 6 are for this purpose by means of two spaced apart in the circumferential direction, trained in the usual manner pendulum bearings 7 at the Tilgermassenträger 3 added. The Tilgermassenträger 3 is in the embodiment shown from the two side panels 4 . 5 formed by means of the rivet 8th axially spaced and are connected between the absorber masses 6 take up. The side part 4 is by means of the hub 9 rotationally received on a shaft.
To the absorber masses 6 center each other and asynchronous suggestions in particular under the influence of gravity and / or during operation of the internal combustion engine in areas outside the exciter order of the torsional vibration damper 1 to avoid are the absorber masses 6 synchronized with each other after exhaustion of a given game. This is floating around the axis of rotation and through the rivet 8th radially limits the guide element 10 rotatably arranged on which integrally four radially extended spokes 11 are included with the game 12 in the circumferential direction in radially formed recesses 13 the absorber masses 6 intervention. In the embodiment shown is by means of the pendulum bearing 7 set a trapezoidal bifilar pendulum motion of the absorber masses so that they rotate at least to a small extent during their pendulum motion about their center of gravity. The recesses 13 therefore have extended crests in the circumferential direction 14 with contact surfaces forming radially inside the absorber masses 6 arranged joints 15 opposite the spokes 11 on, to such a rotation of the absorber masses 6 to enable.
Through the guide element 10 with the spokes 11 and that between the absorber masses 6 and the spokes 11 set game 12 is a relative movement of the absorber masses 6 against each other until the exhaustion of the game 12 possible, for example, to compensate for manufacturing tolerances, principle-related movement tolerances or the like. After exhaustion of the game 12 become the absorber masses 6 along the pendulum bearing given pendulum tracks shifted synchronously, so that asynchronous movements of the absorber masses 6 , which can cause uncontrolled attacks of these together and on the Tilgermassenträger with an associated noise and a deteriorated insulation performance for the eradication of torsional vibrations, be avoided.
The 5 shows the torsional vibration damper 1 of the 1 to 4 similar torsional vibration damper 1a in view with the front part removed with a view of the Tilgermassenträger 3a with the front side part forming the rear side part 5a and the absorber masses 6a , In contrast to the torsional vibration damper 1 are the spokes 11a firmly with the absorber masses 6a connected. To form the radially inside the absorber masses 6a arranged joints 15a grab the spokes 11a radially inward with play 12a in recesses 13a of the guide element 10a one. It is understood that to the formation of the joints 15a also not shown, the knolls 14 of the 1 corresponding crests on the recesses 13a can be provided.
The 6 and 7 show a detail of one opposite the torsional vibration damper 1 of the 1 to 4 modified torsional vibration damper 1b , Here are the recesses 13b extended radially outwards continuously. In each of the recesses engages a spoke 11b of the guide element 10b a, the radially outwardly circumferentially extended crests 14b having. 6 shows the absorber mass 6b in zero position while 7 the absorber mass 6b in the deflected state shows.
Due to the relative movements of crests 14b and absorber mass 6b increases due to the formation of the recesses 14b the game 12b with increasing displacement of the absorber mass 6b from the zero position. It is understood that the recesses 14b may also be designed to expand radially inward.
The 8th shows a modification of the torsional vibration damper 1 of the 1 to 4 ,
The detail of the torsional vibration damper 1c shows a built form of between the two the Tilgermassenträger 3c forming side panels 4c . 5c arranged absorber masses 6c consisting of two outer disc parts 16c and a middle disc part 17c , The disc parts 16c . 17c are radially outward by means of the rivet 18c connected with each other. The middle disc part 17c has the recess 13c into which the spoke connected to the guide element 11c dipped from radially inside.
The 9 and 10 show as possible modifications for the torsional vibration damper 1 and 1a of the 1 to 5 each radially inwardly elastically supported absorber masses 6 . 6a , This is between the absorber masses 6 . 6a and the guide elements 10 . 10a a spring element 19 . 19a arranged. In the embodiments shown, the spring element 19 . 19a each as a helical compression spring 20 . 20a formed around the spokes 11 . 11a is arranged.
DE 19652730 A1 [0002]
DE 102010010674 A1 [0002]
DE 102014217461 A1 [0002]
Torsional vibration damper ( 1 . 1a . 1b . 1c ), in particular centrifugal pendulum ( 2 ) with at least two distributed over the circumference and limited in the circumferential direction displaceable on a about a rotational axis (d) rotatably arranged Tilgermassenträger ( 3 . 3a . 3c ) absorbed absorber masses ( 6 . 6a . 6b . 6c ), characterized in that the at least two absorber masses ( 6 . 6a . 6b . 6c ) are synchronized with each other in the circumferential direction with play.
Torsional vibration damper ( 1 . 1a . 1b . 1c ) according to claim 1, characterized in that the absorber masses ( 6 . 6a . 6b . 6c ) in each case by means of a about the rotational axis (d) arranged, from radially inside into the absorber masses ( 6 . 6a . 6b . 6c ) engaging guide element ( 10 . 10a . 10b ) are connected with play.
Torsional vibration damper ( 1 . 1a . 1b . 1c ) according to claim 2, characterized in that between the guide element ( 10 . 10a . 10b ) and the absorber masses ( 6 . 6a . 6b . 6c ) the game ( 12 . 12a . 12b ) forming joints ( 15 . 15a ) are provided.
Torsional vibration damper ( 1 . 1a . 1b . 1c ) according to claim 3, characterized in that between the guide element ( 10 . 10a . 10b ) and the absorber masses ( 6 . 6a . 6b . 6c ) Spokes ( 11 . 11a . 11b . 11c ), the joints ( 15 ) between the spokes ( 11a ) and the guide element ( 10a ), between the spokes ( 11 ) and the absorber masses ( 6 ) or are arranged within the spokes.
Torsional vibration damper ( 1 . 1a . 1b . 1c ) according to one of claims 1 to 4, characterized in that the absorber masses ( 6 . 6a . 6b . 6c ) as pendulum masses along predetermined pendulum tracks on the Tilgermassenträger ( 3 . 3a . 3c ) are absorbed pendulum.
Torsional vibration damper ( 1 . 1a ) according to claim 5, characterized in that the absorber masses ( 6 . 6a ) radially inward by means of preferably around the spokes ( 11 . 11a ) arranged spring elements ( 19 . 19a ) are elastically supported.
Torsional vibration damper ( 1 . 1a . 1b . 1c ) according to claim 5 or 6, characterized in that the absorber masses ( 6 . 6a . 6b . 6c ) along a displacement on the pendulum tracks opposite the Tilgermassenträger ( 3 . 3a . 3c ) are recorded partially rotating about their center of gravity, whereby the joints ( 15 . 15a ) a rotation game of the absorber masses ( 6 . 6a . 6b . 6c ) enable.
Torsional vibration damper ( 1 . 1a . 1b . 1c ) according to one of claims 5 to 7, characterized in that the spokes ( 11 . 11a . 11b . 11c ) at the absorber masses ( 6 . 6a . 6b . 6c ) on the extent of the centers of gravity of the absorber masses ( 6 . 6a . 6b . 6c ) are included.
Torsional vibration damper ( 1b ) according to one of claims 5 to 8, characterized in that the game ( 12b ) depending on a position of the absorber masses ( 6b ) is set variably on the pendulum track and preferably at a zero position of the absorber masses ( 6b ) is minimal.
Torsional vibration damper ( 1 . 1a . 1b . 1c ) according to one of claims 5 to 9, characterized in that the game ( 12 . 12a . 12b ) a clearance angle of less than 50%, preferably less than 25%, in particular less than 10% and in particular less than 2% of the maximum oscillation angle of the absorber masses ( 6 . 6a . 6b . 6c ) along the aerial tramways.
DE102016212974.0A 2016-07-15 2016-07-15 A torsional vibration damper Withdrawn DE102016212974A1 (en)
DE102016212974.0A DE102016212974A1 (en) 2016-07-15 2016-07-15 A torsional vibration damper
DE112017003573.2T DE112017003573A5 (en) 2016-07-15 2017-06-29 A torsional vibration damper
PCT/DE2017/100542 WO2018010723A1 (en) 2016-07-15 2017-06-29 Torsional vibration damper
DE102016212974A1 true DE102016212974A1 (en) 2018-01-18
ID=59383916
DE102016212974.0A Withdrawn DE102016212974A1 (en) 2016-07-15 2016-07-15 A torsional vibration damper
DE112017003573.2T Pending DE112017003573A5 (en) 2016-07-15 2017-06-29 A torsional vibration damper
DE (2) DE102016212974A1 (en)
WO (1) WO2018010723A1 (en)
DE19652730A1 (en) 1995-12-22 1997-06-26 Luk Lamellen & Kupplungsbau Drive disc for belt or chain drive
WO2011029591A1 (en) 2009-09-11 2011-03-17 Hartmut Flaig Threaded element and tool
DE102014217461A1 (en) 2014-09-02 2016-03-03 Schaeffler Technologies AG & Co. KG centrifugal pendulum
2016-07-15 DE DE102016212974.0A patent/DE102016212974A1/en not_active Withdrawn
2017-06-29 DE DE112017003573.2T patent/DE112017003573A5/en active Pending
2017-06-29 WO PCT/DE2017/100542 patent/WO2018010723A1/en active Application Filing
DE112017003573A5 (en) 2019-04-18
WO2018010723A1 (en) 2018-01-18
CN103582767A (en) 2014-02-12 Drive system for a vehicle
CN105745469B (en) 2018-07-10 The simplified torsional vibration damper with centering block
2019-01-15 R118 Application deemed withdrawn due to claim for domestic priority