EP3775612A1 - Drehschwingungsdämpfer - Google Patents
DrehschwingungsdämpferInfo
- Publication number
- EP3775612A1 EP3775612A1 EP19702522.4A EP19702522A EP3775612A1 EP 3775612 A1 EP3775612 A1 EP 3775612A1 EP 19702522 A EP19702522 A EP 19702522A EP 3775612 A1 EP3775612 A1 EP 3775612A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pendulum
- mass
- energy storage
- storage element
- torsional vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
- F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
- F16F15/145—Masses mounted with play with respect to driving means thus enabling free movement over a limited range
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/1211—C-shaped springs
Definitions
- the invention relates to a torsional vibration damper, in particular two-mass flywheel, with the aid of which torsional vibrations of a drive shaft of a motor vehicle engine can be damped.
- a torsional vibration damper in which a centrifugal force pendulum is provided on a secondary mass of a dual-mass flywheel.
- the centrifugal pendulum is arranged radially within an acting on a primary mass and the secondary mass of the dual mass flywheel bow spring.
- a torsional vibration damper for torsional vibration damping in a drive train of a motor vehicle is provided with a primary mass for introducing a torque, wherein the primary mass has a flywheel connectable to an input shaft, in particular motor shaft of a motor vehicle engine, a secondary mass that is rotatable to a limited extent relative to the primary mass for discharging a torque on the primary mass and on the Sekundärmas- se vulnerable, in particular designed as a bow spring, energy storage element and connected to the secondary mass centrifugal pendulum for providing tion of a rotational irregularity opposing return torque, where in the centrifugal pendulum in the axial direction between the flywheel of the primary mass and the energy storage element is arranged.
- the primary mass and the secondary mass connected via the energy storage element form a dual-mass flywheel with which torsional vibrations can be damped. Since the energy storage element and the centrifugal pendulum can be arranged on a comparatively large radius, both the two-mass flywheel and the centrifugal pendulum can provide a high damping effect.
- the centrifugal pendulum has a substantially circular cylindrical space required. However, in the case of the dual-mass flywheel, a substantially circular-cylindrical space requirement is provided only in the radius region of the energy storage element.
- the secondary mass in particular a starting flange which can be tangentially abutted against the energy storage element, can have a bent course in the radial direction.
- the arrangement of the centrifugal pendulum pendulum between the flywheel of the primary mass and the energy storage element can be used radially outward otherwise free space for a better vibration damping behavior, while radially inside an increase in the axial space requirement is avoided, so that with a small space requirement a good damping in a drive train is made possible.
- the primary mass and the energy storage element which is designed in particular as a bow spring, to the primary mass limits rotationally coupled seconds.
- Därmasse can form a spring-mass system, which can dampen in a certain frequency range rotational irregularities in the rotational speed and in the torque of the drive power generated by an automotive engine.
- the mass moment of inertia of the primary mass and / or the secondary mass and the spring characteristic of the energy storage element may be selected such that vibrations in the frequency range of the dominant engine orders of the motor vehicle engine can be damped.
- the mass moment of inertia of the primary mass and / or the secondary mass can be influenced in particular by an attached additional mass.
- the primary mass can have a flywheel with which a cover can be connected, as a result of which a substantially annular receiving space for the energy storage element can be limited.
- the primary mass can strike tangentially on the energy storage element via embossments projecting into the receiving space.
- An outlet flange of the secondary mass which can strike tangentially at the opposite end of the energy storage element, can protrude into the receiving space.
- the flywheel of the primary mass may be directly or indirectly coupled to a drive shaft of an automotive engine.
- the secondary mass can be coupled directly or indirectly, for example via an intermediate disconnect clutch, to a transmission input shaft of a motor vehicle transmission.
- the centrifugal pendulum pendulum can have a pendulum mass that can be moved relative to a support flange, in particular via curved pendulum tracks.
- the at least one pendulum mass of the centrifugal pendulum under the influence of centrifugal force, endeavors to assume a position as far as possible from the center of rotation.
- the "zero position" is thus the position farthest radially from the center of rotation, which can take the pendulum mass in the radially outer position.
- the pendulum mass will assume this radially outer position. In the case of speed fluctuations, the pendulum mass deflects along its pendulum track due to its inertia.
- the pendulum mass can be moved in the direction of the center of rotation.
- the centrifugal force acting on the pendulum mass is thereby divided into one component tangentially and another component normal to the pendulum track.
- the tangential force component provides the restoring force which the pendulum mass wants to return to its "zero position", while the normal force component is responsive to the speed fluctuations.
- tendes force introduction element, in particular the output flange of the secondary mass acts and generates there a counter-torque, which counteracts the speed fluctuation and damps the introduced speed fluctuations.
- the pendulum mass can therefore be maximally swung out and assume the position which is radially the furthest inside.
- the webs provided in the carrier flange and / or in the pendulum mass have suitable curvatures in which a coupling element configured in particular as a roller can be guided.
- a coupling element configured in particular as a roller
- at least two rollers are provided, which are each guided on a raceway of the support flange and a pendulum track of the pendulum mass.
- more than one pendulum mass is provided.
- several pendulum masses are distributed evenly distributed in the circumferential direction on the support flange.
- the inert mass of the pendulum mass and / or the relative movement of the pendulum mass to the carrier flange is designed in particular for damping a specific frequency range of rotational irregularities, in particular of an engine order of the motor vehicle engine.
- more than one pendulum mass and / or more than one support flange is provided.
- two pendulum masses connected to one another via bolts or rivets designed in particular as spacers are provided, between which the support flange is positioned in the axial direction of the torsional vibration damper.
- two, in particular substantially Y-shaped interconnected, flange parts of the support flange may be provided, between which the pendulum mass is positioned.
- the pendulum mass can have pendulum plates provided on different axial sides of the support flange, which are connected to one another via an intermediate piece arranged in a pendulum opening of the support flange.
- the intermediate piece can have a pendulum track, which can be guided directly or indirectly on a path formed by the pendulum opening of the support flange pendulum.
- the pendulum track of the intermediate piece of the pendulum mass and the track of the support flange may be arranged in a common axial region and viewed in the radial direction, at least partially overlapping each other.
- a coupling element designed, for example, as a roller, can be arranged, which under the influence of centrifugal force both adjoins the pendulum can lie as well as on the track. Since the pendulum mass can be guided in a pendulum fashion exclusively via the intermediate piece on the support flange, it is not necessary to provide a pendulum track on the pendulum sheets, so that the pendulum sheets can be manufactured simply and inexpensively.
- the pendulum mass is in particular guided at more than one coupling point, preferably exactly two coupling points, on the support flange pendulum.
- the intermediate piece can be designed for coupling to exactly one coupling point, so that one of the number of coupling points provided for guiding the pendulum mass can be provided corresponding number of intermediate pieces.
- the intermediate piece for the coupling can be configured at exactly two or optionally more coupling points, so that in particular exactly one intermediate piece can realize the number of coupling points provided for guiding the pendulum mass.
- the energy storage element at least partially covers the centrifugal pendulum.
- the energy storage element and the centrifugal pendulum can be arranged in a common radial region.
- the energy storage element can already be provided as far as possible radially outward, so that only a radially outer, in particular acting as burst protection, cover and an optionally provided Gleitscha- le for guiding the energy storage element in the circumferential direction are provided radially outward to the energy storage element.
- the centrifugal pendulum can thereby be positioned comparatively far radially outside, whereby the centrifugal pendulum can provide a good damping behavior and a high insulation effect.
- the primary mass preferably has a rib projecting, in particular substantially radially inward, for forming an input stop which can be tangentially abutted against the energy storage element, the input stop and the centrifugal pendulum overlapping one another in a common radius range in the axial direction.
- a torque introduced into the primary mass during traction operation can be transmitted to the energy storage element.
- the rib can be arranged at least partially axially next to the centrifugal force pendulum.
- the rib can, for example, surround the centrifugal pendulum radially on the outside or only begin in an axial region next to the centrifugal pendulum.
- the rib and the centrifugal pendulum can be arranged in a common radial region.
- the Centrifugal pendulum can thereby be positioned relatively far radially outside, whereby the centrifugal pendulum can provide a good damping behavior and a high insulation effect.
- the primary mass comprises, in particular in one piece, a cover projecting from the flywheel in the axial direction to the radially outer covering of the centrifugal pendulum and the energy storage element, the rib having both the flywheel and the cover, in particular in one piece , connected is.
- the primary mass can be easily configured as a casting. An undercut caused by the rib can thus be avoided, so that the primary mass can be easily removed from the mold.
- the rib can in particular form a draft angle, which increases the strength of the rib and, with a low use of material and space requirement, enables transmission of high torques.
- the rib has a radially inwardly open receiving pocket for partially receiving the centrifugal pendulum, wherein in particular the receiving pocket is made by machining.
- the receiving pocket can be formed, for example, by partially turning the rib in the axial region of the centrifugal pendulum.
- the rib is preferably produced by non-cutting shaping, in particular embossing.
- the primary mass may be configured as a drawn pot made from a steel sheet to form the flywheel and the overlap formed integrally with the flywheel.
- the rib can be produced by pressure forming without cutting, for example, by a radially outward attacking tool impresses the rib as radially inwardly projecting bead.
- the production of the torsional vibration damper can be done inexpensively.
- the secondary mass particularly preferably has an output flange which can be tangentially abutted on the energy storage element and an output part which is separate from the output flange, in particular configured as an output hub, the output flange, the output part and the centrifugal pendulum being connected to one another via a common fastening means, in particular a riveted connection , A separate attachment means for fixing the centrifugal pendulum can be saved, whereby the number of components is kept low.
- the secondary mass has an output flange which can be tangentially abutted against the energy storage element, the output flange having an axial thickness that can be varied in the radial direction.
- the output flange may, for example, radially inward have a small axial thickness, so that the axial space requirement is kept radially inward low. If necessary, the output flange may have a small axial thickness radially outward, in order to pass the other components of the torsional vibration damper to the energy storage element.
- the moment of inertia of the secondary mass can be increased, whereby a better damping behavior and a high isolation effect for the dual-mass flywheel can be achieved.
- the knowledge is exploited that with a basically bent profile of a disk-shaped output flange with a constant axial thickness between the output flange and the centrifugal pendulum remains a free space, which can be filled at least partially by the material of the correspondingly thickened output flange , Due to the thickened output flange, in particular, an additional mass attached separately to the secondary mass can be saved so that the secondary mass can in particular be designed without additional mass.
- the secondary mass consists exclusively of the output flange, the output hub, the centrifugal pendulum pendulum, a sealing membrane optionally provided sealingly supported on the primary mass, and the fastening means.
- the output flange has a first axial side facing the centrifugal force pendulum and a second axial side pointing away from the centrifugal pendulum, wherein in a common radial region of the output flange with the centrifugal pendulum, the first axial side substantially parallel to the centrifugal pendulum, in particular in a radial plane, and the second axial side in radial direction has a stepped and / or tapered course.
- the output flange can thereby have an approximately V-shaped cross section.
- the output flange can make fullest use of the space otherwise available for an output flange with a constant axial thickness towards the centrifugal pendulum in order to increase its mass moment of inertia.
- the first axial side of the output flange can axially delimit the centrifugal pendulum and form an axial stop for the centrifugal pendulum against which, for example, a pendulum mass can start axially via a sliding cam, which has a lower coefficient of friction than a steel / steel contact ,
- a lubricant in particular lubricating grease
- the energy storage element can be arranged radially offset radially outward relative to the centrifugal pendulum, so that a radially outer edge of the energy storage element is arranged further radially outward than a radially outer edge of the centrifugal pendulum.
- the centrifugal pendulum is spaced far enough radially inward from the centrifugal force distributed radially outward lubricant that the pendulum masses of the centrifugal pendulum are not decelerated by a dip in the lubricant during a pendulum motion and detuned.
- the centrifugal pendulum can be spray-lubricated by the lubricant, especially greased, be. This allows a long service life of the centrifugal pendulum without adversely affecting the damping properties of the centrifugal pendulum pendulum by the lubricant.
- FIG. 1 shows a schematic sectional view of a first embodiment of a
- FIG. 2 shows a schematic sectional view of a second embodiment of a
- the torsional vibration damper 10 shown in Fig. 1 can be used in a drive train of a motor vehicle to dampen torsional vibrations generated by an automotive engine.
- the torsional vibration damper 10 has a primary mass 12 which can be directly or indirectly connected to a drive shaft of the motor vehicle engine and to which a secondary mass 16 can be rotated in a limited manner via an energy storage element 14 designed as a bow spring.
- Secondary mass 16 has an outlet flange 18 projecting into a receiving space 34 that is partially delimited by primary mass 12 and that can impact tangentially on energy storage element 14 received in receiving space 34 in order to transmit a torque.
- the primary mass 12 can have ribs 22 which project into the receiving space 34 and are designed as indentations, which can strike tangentially at the opposite end of the energy storage element 14.
- the secondary mass 16 has an output hub 20 secured to the output flange 18, which may be coupled, for example, to a transmission input shaft of a motor vehicle transmission, optionally via an intermediate disconnect clutch.
- the output hub 20 and the output flange 18 are connected via a fixing means 24 designed as a rivet connection, which at the same time also fastens a centrifugal pendulum 26.
- the pot-shaped primary mass 12 has a flywheel 28 arranged essentially in a radial plane, from which a cylindrical cover 30 projects in the axial direction.
- the cover 30 is arranged radially outside the centrifugal pendulum 26 and the energy storage element 14. Attached to the cover is a cover 32, in particular by welding, which covers the energy storage element 14 and a part of the output flange 14 on the axial side facing away from the flywheel 28. With the aid of a sealing membrane 36, which is fastened in a prestressed manner via the fastening means 24 to the outlet flange 18 and which can be supported in a sealingly rotatable manner on the lid 32 via a sliding ring 44, the receiving space 34 can be sealed.
- the centrifugal pendulum pendulum 26 is arranged in the axial direction between the flywheel 28 of the primary mass 12 and the energy storage element 14 or output flange 18 of the secondary mass 16.
- the centrifugal force pendulum 26 is in this case arranged radially on the outside so that viewed in the axial direction, a radially outer part of the centrifugal pendulum pendulum 26 is arranged in a common radius region with the energy storage element 14.
- a receiving pocket 38 which is open radially inwardly, can be formed in the rib 22, into which the centrifugal force pendulum 26 can protrude partially from radially inward.
- the rib 22 can form an input stop 40 tangentially engageable with the energy storage element 14, which can preferably delimit an axial side of the receiving pocket 38 and can likewise be arranged partially in a common radius region with the radially outer part of the centrifugal force pendulum 10.
- the receiving pocket 38 can be designed to be open on one side towards the lid 32 and form the input stop 40 with the smaller radial extension in order to simplify the assembly of the centrifugal force pendulum 10 in the torsional vibration damper 10.
- the centrifugal force pendulum 10 offset radially on the outside and in the axial direction next to the energy storage element 14, a large axial extension results for the torsional vibration damper 10 radially inwardly and by an obliquely and / or stepwise bent profile of the output flange 18 radially inward small axial extent.
- the torsional vibration damper 10 a housing 42, which is for example part of a motor vehicle transmission, radially outward in enclose something in the axial direction to use the space released radially outside the housing 42.
- a lubricant in particular lubricating grease, can be provided, which can extend from the cover 30 to a filling radius 44 due to centrifugal force.
- the lubricant is thereby arranged slightly radially outside the centrifugal force pendulum 10, wherein the energy storage element 14 may be partially, in particular substantially half, immersed in the lubricant.
- the output flange 18 is thickened in comparison with the embodiment of the torsional vibration damper 10 shown in FIG. 1 in order to significantly increase the mass moment of inertia of the secondary mass 16.
- the free in Fig. 1 volume of the receiving space 34 between the output flange 18 and the centrifugal pendulum 26 is filled in the embodiment of the torsional vibration damper 10 shown in Fig. 2 for the most part of the material of the output flange 18.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Vibration Prevention Devices (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018108404.8A DE102018108404A1 (de) | 2018-04-10 | 2018-04-10 | Drehschwingungsdämpfer |
PCT/DE2019/100038 WO2019196970A1 (de) | 2018-04-10 | 2019-01-16 | Drehschwingungsdämpfer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3775612A1 true EP3775612A1 (de) | 2021-02-17 |
Family
ID=65268715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19702522.4A Withdrawn EP3775612A1 (de) | 2018-04-10 | 2019-01-16 | Drehschwingungsdämpfer |
Country Status (5)
Country | Link |
---|---|
US (1) | US11378154B2 (de) |
EP (1) | EP3775612A1 (de) |
CN (1) | CN111919047B (de) |
DE (2) | DE102018108404A1 (de) |
WO (1) | WO2019196970A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020107115A1 (de) | 2020-03-16 | 2021-09-16 | Schaeffler Technologies AG & Co. KG | Drehschwingungsdämpfer |
DE102020127591A1 (de) | 2020-10-20 | 2022-04-21 | Schaeffler Technologies AG & Co. KG | Drehschwingungsdämpfer |
DE102021104609A1 (de) | 2021-02-26 | 2022-09-01 | Schaeffler Technologies AG & Co. KG | Fliehkraftpendel, Drehschwingungsdämpfer und Verwendung eines Fliehkraftpendels mit einem geräuscharmen Dämpfungsverhalten |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE506553T1 (de) * | 2005-10-29 | 2011-05-15 | Schaeffler Technologies Gmbh | Drehschwingungsdämpfungseinrichtung |
EP2694312B1 (de) | 2011-04-04 | 2015-03-04 | Schaeffler Technologies AG & Co. KG | Einrichtung zum übertragen eines drehmoments |
FR2976641B1 (fr) | 2011-06-14 | 2013-06-07 | Valeo Embrayages | Dispositif d'amortissement de torsion comportant des masselottes pendulaires decalees axialement par rapport a des rondelles de guidage |
DE112013002877T5 (de) | 2012-08-02 | 2015-02-26 | Aisin Aw Co., Ltd. | Startvorrichtung |
DE102015203105B4 (de) | 2015-02-20 | 2017-12-14 | Schaeffler Technologies AG & Co. KG | Drehschwingungsdämpfer |
DE102015210743A1 (de) | 2015-06-12 | 2016-12-15 | Schaeffler Technologies AG & Co. KG | Drehschwingungsdämpfer |
WO2017190725A1 (de) | 2016-05-04 | 2017-11-09 | Schaeffler Technologies AG & Co. KG | Drehschwingungsdämpfer |
DE102016214469A1 (de) | 2016-08-04 | 2018-02-08 | Schaeffler Technologies AG & Co. KG | Drehmomentübertragungseinrichtung |
DE102018113308A1 (de) | 2018-06-05 | 2019-12-05 | Schaeffler Technologies AG & Co. KG | Drehmomentübertragungseinrichtung mit geschlossener Fettkammer |
DE102018117721A1 (de) * | 2018-07-23 | 2020-01-23 | Schaeffler Technologies AG & Co. KG | Drehschwingungsdämpfer |
-
2018
- 2018-04-10 DE DE102018108404.8A patent/DE102018108404A1/de not_active Withdrawn
-
2019
- 2019-01-16 CN CN201980022671.9A patent/CN111919047B/zh active Active
- 2019-01-16 DE DE112019001877.9T patent/DE112019001877A5/de active Pending
- 2019-01-16 EP EP19702522.4A patent/EP3775612A1/de not_active Withdrawn
- 2019-01-16 US US17/044,345 patent/US11378154B2/en active Active
- 2019-01-16 WO PCT/DE2019/100038 patent/WO2019196970A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
DE112019001877A5 (de) | 2020-12-31 |
DE102018108404A1 (de) | 2019-10-10 |
WO2019196970A1 (de) | 2019-10-17 |
US20210025474A1 (en) | 2021-01-28 |
CN111919047B (zh) | 2022-09-06 |
CN111919047A (zh) | 2020-11-10 |
US11378154B2 (en) | 2022-07-05 |
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