DE102021107235B3 - Compact pendulum rocker damper arrangement - Google Patents

Abstract

The arrangement of the friction devices 111, 112 radially inside the flywheel 113 and axially outside of the rocker arm damper 100 provides a rocker arm damper arrangement 108 that is compact in the axial direction, which can also be used where there is little space available and which is easy to install. This is preferably used in the drive train of a motor vehicle 2 , in particular in a hybrid drive train 1 of a motor vehicle 2 .

Description

The present invention relates to a compact pendulum rocker damper arrangement which is compact in the axial direction. This is preferably used in drive trains of motor vehicles, in particular in hybrid drive trains of motor vehicles.

Pendulum rocker dampers are, for example, from WO 2018/215018 A1 known, which serve to dampen rotational irregularities in the drive train of motor vehicles. The pendulum rocker dampers have rocker elements which are pretensioned by compression springs and which can be moved tangentially and radially in predetermined movement paths. The pendulum rocker damper therefore has a damping characteristic that is dependent on the angle of rotation. Furthermore, additional friction devices are assumed to be known, which additionally enable frictional damping. As a result of these additional friction devices, the installation space required for installing the pendulum rocker damper increases in the axial direction.

Proceeding from this, the present invention is based on the object of at least partially overcoming the problems known from the prior art and, in particular, of specifying a pendulum rocker damper arrangement which is compact in the axial direction.

This object is achieved with the features of independent claim 1. Further advantageous embodiments of the invention are specified in the dependent claims. The features listed individually in the dependently formulated claims can be combined with one another in a technologically meaningful manner and can define further embodiments of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, with further preferred embodiments of the invention being presented.

The pendulum rocker damper arrangement according to the invention comprises a pendulum rocker damper with an input part and an output part which can be rotated relative to the input part about an axis of rotation and rocker elements connecting these, which are biased against each other via spring devices, and a flywheel, with at least one friction device for frictional damping between the input part and output part of the pendulum rocker damper is trained. The pendulum rocker damper arrangement is characterized in that at least one friction device is formed in the axial direction relative to the axis of rotation inside the flywheel and / or at least one friction device in the axial direction relative to the axis of rotation outside the pendulum rocker damper.

The term friction device is understood to mean that it has at least two friction partners, one of which is non-rotatably connected to the input part and the other is non-rotatably connected to the output part Cause output part. At least one of the friction partners is preferably formed from a plastic.

The spring devices preferably each include at least one compression spring, particularly preferably two compression springs each, which are coaxial. In the input part and / or in the output part, movement paths are formed which, in the presence of rotational irregularities and thus relative movements between the input part and the output part, can lead to predetermined tangential and radial displacements of the rocker elements against the spring action of the spring devices, which lead to a torsion-angle-dependent damping characteristic of the pendulum rocker damper . The at least one friction device allows an additional damping function that causes frictional damping between the input part and the output part. By forming the at least one friction device within the flywheel, a compact pendulum rocker damper arrangement is achieved. By arranging the at least one friction device in the axial direction outside the pendulum rocker damper, it is also possible to utilize installation space outside the pendulum rocker damper to accommodate the at least one friction device and thus enable a compact structure in the axial direction.

An embodiment is preferred in which the at least one friction device is formed inside the flywheel, preferably both in the axial and in the radial direction inside the flywheel. The thickness of the flywheel in the axial direction can be used to accommodate the at least one friction device. The at least one friction device is preferably designed coaxially to the axis of rotation. In a preferred embodiment, two friction devices are formed, both of which are formed within the flywheel and coaxially to the axis of rotation. The use of two friction devices allows a precise definition of the additional frictional damping, which acts in addition to the damping characteristic of the pendulum rocker damper.

In an advantageous embodiment, a first friction device is formed which has a comprises a first friction ring, a first support plate, a first retaining plate and a first disc spring, the first friction ring being non-rotatably connected to the output part and the first disc spring and the first retaining plate being non-rotatably connected to the input part, the first supporting disc being axially relative to the axis of rotation is formed between the first plate spring and the first retaining plate, wherein the first friction ring is formed in the axial direction with respect to the axis of rotation between the first support disk and the first retaining plate and the first disk spring exerts a force on the first support plate in the direction of the first retaining plate, which the first support disc presses against the first friction ring. This creates a frictional connection between the first friction ring as the first friction partner and the first support disk and the first retaining plate as the second friction partner, which causes the frictional damping. Depending on the damping component required for the frictional damping, the first friction disk is made of a suitable material with a predeterminable coefficient of friction, as is the first support disk and the first holding plate. The first disc spring and the corresponding spring force are also selected as a function of the required damping component. The first support disk is preferably formed from a metal, in particular from a steel.

The first friction ring is preferably connected non-rotatably to a hub element of the output part via a support plate. This enables the first friction device to be designed at a distance in the radial direction from a hub element of the output part. The hub element can be connected to a shaft, for example an input shaft of a separating clutch or a transmission.

According to an advantageous embodiment, a second friction device is formed which has a second friction ring which is connected to the output part in a rotationally fixed manner, the second friction device also having a second disc spring and a second retaining plate, which are connected to the input part in a rotationally fixed manner, and a second support disc , wherein the second friction ring is formed in the axial direction with respect to the axis of rotation between the second support disk and the second retaining plate and the second plate spring exerts a force on the second support disk in the direction of the second retaining plate, which force presses the second support disk against the second friction ring. This creates a frictional connection between the second friction ring as the first friction partner and the second support disk and the second retaining plate as the second friction partner, which causes the frictional damping. Depending on the damping component required for the frictional damping, the second friction disk is made of a suitable material with a predeterminable coefficient of friction, as is the second support disk and the first holding plate. The second disc spring and the corresponding spring force are also selected depending on the required damping component. The second support disk is preferably formed from a metal, in particular from a steel.

The second friction ring is preferably connected in a rotationally fixed manner to the outer circumference of a hub element of the output part. This can be done, for example, by a corresponding toothing on the outer circumference of the hub element, the second friction ring then having a corresponding toothing. This enables the formation of a second friction device, which is formed close to the hub element in the radial direction.

According to an advantageous embodiment, a first friction device with a first friction ring and a second friction device with a second friction ring are configured and the second friction ring is configured concentrically with respect to the axis of rotation within the first friction ring. Both the first friction device and the second friction device are preferably arranged inside the flywheel and / or axially outside the pendulum rocker damper. The combination of two friction devices allows the necessary friction damping component to be precisely adjusted and adapted to the application.

According to an advantageous embodiment, the flywheel and the input part of the pendulum rocker damper are connected to one another by a form-fitting connection, in particular one or more riveted connections. This allows simple pre-assembly of the pendulum rocker damper on the flywheel.

The pendulum rocker damper arrangement described is preferably designed in a particularly advantageous manner in drive trains of motor vehicles. This drive train preferably has an internal combustion engine as a torque source, in particular in combination with at least one electric drive machine.

Furthermore, a hybrid drive train, in particular for a motor vehicle, is proposed, comprising an internal combustion engine with a crankshaft and at least one electric drive machine, in which a pendulum rocker damper arrangement is designed as described, in which the flywheel and the input part of the pendulum rocker damper are connected to the crankshaft in a rotationally fixed manner.

Furthermore, a motor vehicle comprising such a hybrid drive train is proposed. Furthermore, a motor vehicle comprising a pendulum rocker damper arrangement as described is proposed.

As a precaution, it should be noted that the numerals used here (“first”, “second”, ...) primarily (only) serve to distinguish between several similar objects, sizes or processes, i.e. in particular no dependency and / or sequence of these objects , Parameters or processes to each other. Should a dependency and / or sequence be necessary, this is explicitly stated here or it is obvious to a person skilled in the art when studying the specifically described embodiment.

• 1: ein Beispiel eines Hybridantriebsstrangs;
• 2: ein Beispiel einer Federwippendämpferanordnung mit Federwippendämpfer;
• 3: einen Ausschnitt des Beispiels aus 2; und
• 4 eine Explosionsdarstellung eines Teils der Federwippendämpferanordnung aus 2.

The invention and the technical environment are explained in more detail below with reference to the figures. It should be pointed out that the invention is not intended to be restricted by the exemplary embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description and / or figures. In particular, it should be pointed out that the figures and in particular the size relationships shown are only schematic. The same reference symbols denote the same objects, so that explanations from other figures can be used in addition, if necessary. Show it:

• 1 : an example of a hybrid powertrain;
• 2 : an example of a spring rocker damper arrangement with spring rocker damper;
• 3 : an excerpt from the example 2 ; and
• 4th an exploded view of part of the spring rocker damper assembly 2 .

1 shows schematically the basic structure of an example of a hybrid drive train 1 with a pendulum rocker damper 100, which in relation to FIG 2 until 4th is explained in more detail. The hybrid drive train 1 is used in a motor vehicle 2, which is only partially shown, and is used to drive several wheels 3 of the motor vehicle 2. The hybrid drive train 1 has an internal combustion engine 4, in particular in the form of a gasoline or diesel engine, which can optionally be operated via clutches 5, 6, 7 can be coupled to a transmission 8. The transmission 8, preferably an automatic transmission, has, on the part of its two transmission input shafts 9, 10, two clutches 6, 7 forming a double clutch device. By means of these two clutches 6, 7 (forming partial clutches of a double clutch device), either the first transmission input shaft 9 (via the first clutch 6) or the second transmission input shaft 10 (via the second clutch 7) can be coupled to a central carrier 11.

The carrier 11 is permanently rotatably connected to a rotor 12 of an electric drive machine 13. In this example, the electric drive machine 13 is arranged axially parallel to the carrier 11, the carrier 11 in turn being arranged coaxially to a crankshaft 14 of the internal combustion engine 4. The crankshaft 14 is shown in simplified form as an axis of rotation 15. In this embodiment, the rotor 13 is mounted on a rotor shaft 16 and the rotor shaft 16 is permanently rotationally coupled to the carrier 11 via a gear stage 17, here a face gear stage.

The carrier 11 is also connected to an output-side (second) coupling component 18 of the separating coupling 5. An input-side (first) clutch component 19 of the separating clutch 5 is in turn coupled to the pendulum rocker damper 100. The pendulum rocker damper 100 is thus effectively inserted between the crankshaft 14 and the separating clutch 5, in particular the first coupling component 19 of the separating clutch 5.

The separating clutch 5 is preferably designed as a friction clutch. The first clutch 6 and the second clutch 7 are also preferably designed as friction clutches, in particular friction disk clutches. The internal combustion engine 4 can be decoupled from the rest of the hybrid drive train 1 via the separating clutch 5, so that the hybrid drive train 1 is operated exclusively electrically via the electric drive machine 13. The transmission 8 of the hybrid drive train 1 is connected on the output side via a differential stage 20 to the wheels 3 of the motor vehicle 2 in order to drive the wheels 3 in accordance with the drive state of the hybrid drive train 1. The transmission 8 is connected to the separating clutch 5 via an intermediate shaft 21.

The hybrid drive train 1 is preferably used in such a way that the crankshaft 14 and thus also the carrier 11 with the first clutch 6 and the second clutch 7 and the separating clutch 5 are arranged coaxially and transversely, namely perpendicular, to a vehicle longitudinal axis 22 of the motor vehicle 2. Alternatively, these components can also be aligned longitudinally and thus parallel to the longitudinal axis 22 of the vehicle, and this is preferred.

2 shows an example of a pendulum rocker damper 100 in cross section in a pendulum rocker damper arrangement 108. The pendulum rocker damper 100 has an axis of rotation 15 which is coaxial with the crankshaft 14 of the internal combustion engine 4, to which the rocker pendulum damper 100 is connected as set out below. In the following, the terms axial, radial and in the circumferential direction are each defined in relation to the axis of rotation 15. The term axial and axial direction is understood as a direction along or parallel to the axis of rotation 15. The term radial and radial direction is understood as a direction perpendicular to the axis of rotation 15. The term circumferential direction is understood to mean a direction along an imaginary circular line encircling concentrically to the axis of rotation 15.

The pendulum rocker damper 100 has an input part 101 and an output part 102. These are connected to one another via several rocker elements 109. The rocker elements 109 are pretensioned against one another via a plurality of spring devices 105. Each spring device 105 consists of a first spring 106 and a second spring 107 which are coaxial. Due to the relative deflection of the rocker element 109 against the spring devices 105, torsional vibrations or rotational irregularities are damped. The pendulum rocker damper 100 preferably has three rocker elements 109 and three spring devices 105, which are each formed between two adjacent rocker elements 109.

The pendulum rocker damper arrangement 108 further comprises a first friction device 112 and a second friction device 111. With respect to the axis of rotation 15, the second friction device 111 lies radially further inward than the first friction device 112. The first friction device 112, which is shown in detail in FIG 3 shown, comprises a first friction ring 114. The first friction ring 114 is connected to the output part 102 in a rotationally fixed manner via a support plate 119. A first disc spring 115 is formed in an axial direction with respect to the axis of rotation 15 between a flexplate 104 and a first support disk 116, and presses the first support disk 116 in the direction of the first friction ring 114 connected to a mass ring 103 of a flywheel 103, which in turn is fixed to a flywheel 113, which further comprises an outer ring 126. Furthermore, a first holding plate 120 is also connected non-rotatably to the mass ring 103 and thus to the flywheel 113. The flywheel 113 is non-rotatably connected to the crankshaft 14 of the internal combustion engine 4 via the screws 110.

The input part 101 is designed as a flange which is connected non-rotatably to the flywheel 113 via the rivets 127 and thus non-rotatably connected to the crankshaft 14 of the internal combustion engine 4. The first plate spring 115 presses the first support disk 116 in the direction of the first holding plate 120, so that the first friction ring 114 is clamped between the first support disk 116 and the first holding plate 120. Since the first friction ring 114 is in turn connected to the output part 102 via the support plate 119, a relative movement between the input part 101 and the output part 102 is dampened by friction.

The second friction device 111 comprises a second friction ring 121, which is non-rotatably connected to an outer circumference 128 of a hub element 117 of the output part 102. The second friction device 111 further comprises a second plate spring 122, which is clamped between the flex plate 104 and a second support disk 123 and exerts a force in the direction of the second friction ring 121. Furthermore, a second retaining plate 124 is formed, which is formed such that the second friction ring 121 is formed in the axial direction with respect to the axis of rotation 15 between the second support disk 123 and the second retaining plate 124 and from the second disc spring 122 via the second support disk 123 is pressed against the second retaining plate 124, so that the second friction ring 121 connected to the hub element 117 of the output part 102 is clamped and thus frictional damping of relative movements between the input part 101 and the output part 102 takes place.

The hub element 117 of the output part 102 can be connected to a shaft, in particular directly to an input shaft 23 of the separating clutch 5 of the hybrid drive train 1. Furthermore, roller bodies 118 are formed which run in guide tracks in the output part 102 and which are connected to the rocker elements 109, so that a defined movement takes place between the rocker elements 109 and the output part 201.

The pendulum rocker damper 100 serves to dampen rotational vibrations that are entered into the pendulum rocker damper 100 by the internal combustion engine 4 via the crankshaft 14, the flywheel 113 and the mass ring 103 and are transmitted to the output part 102 via the rocker elements 109. The damping takes place on the one hand via the spring devices 105 and on the other hand via the first friction device 112 and the second friction device 111, as described above.

In order to ensure a space-saving structure of the pendulum rocker damper arrangement 108 in the axial direction, the first friction device 112 and the second friction device 111 are formed in the radial direction inside the mass ring 103 and thus inside the flywheel 103. At the same time, the first friction device is thus formed outside the pendulum rocker damper 100 in the axial direction. This also enables a simple This is first preassembled on the flywheel 113 via the rivets 127 and then the pendulum rocker damper assembly 108 comprising the flywheel 113 and the pendulum rocker damper 100 is screwed to the crankshaft 14 via the screws 110. This simplifies the assembly of the pendulum rocker damper arrangement 108, since previously the flywheel 113 was first connected, in particular screwed, to the crankshaft 14 and then in a second work step the pendulum rocker damper 100 was attached to the flywheel. In the case of the pendulum rocker damper arrangement 108 described here, a higher degree of pre-assembly can be achieved and the final assembly can be significantly simplified. Furthermore, due to the construction of the pendulum rocker damper arrangement 108, which is compact in the axial direction, the use of a pendulum rocker damper 100 is possible even with a small installation space available.

4th shows the components of the pendulum rocker damper arrangement 108 necessary for the construction of the friction devices 111, 112 in an exploded view.

The arrangement of the friction devices 111, 112 radially inside the flywheel 113 and axially outside the pendulum rocker damper 100 provides a pendulum rocker damper assembly 108 which is compact in the axial direction and which can be used even when the space available is small and which is easy to assemble. This is preferably used in the drive train of a motor vehicle 2, in particular in a hybrid drive train 1 of a motor vehicle 2.

List of reference symbols

1

Hybrid powertrain

2

Motor vehicle

3

wheel

4th

Internal combustion engine

5

Disconnect clutch

6th

First clutch

7th

Second clutch

8th

transmission

9

First transmission input shaft

10

Second transmission input shaft

11th

Central carrier

12th

rotor

13th

Electric prime mover

14th

crankshaft

15th

Axis of rotation

16

Rotor shaft

17th

Gear stage

18th

Second coupling component

19th

First coupling component

20th

Differential stage

21

Intermediate shaft

22nd

Vehicle longitudinal axis

23

Input shaft

100

Pendulum rocker damper

101

Input part

102

Output part

103

Mass ring

104

Flexplate

105

Spring device

106

First feather

107

Second spring

108

Pendulum rocker damper arrangement

109

Rocker element

110

screw

111

second friction device

112

first friction device

113

flywheel

114

First friction ring

115

First disc spring

116

First support disc

117

Hub element

118

Reel body

119

Support plate

120

First retaining plate

121

Second friction ring

122

Second disc spring

123

Second support disc

124

Second retaining plate

125

Fixing plate

126

Outer ring

127

rivet

128

Outer circumference

Claims (10)

A pendulum rocker damper arrangement (108), comprising a pendulum rocker damper (100) with an input part (101) and an output part (102) which can be rotated relative to the input part (101) about an axis of rotation (15) and rocker elements (109) connecting these, which are connected via spring devices (105 ) are biased against each other, and a flywheel (113), wherein at least one friction device (111, 112) for frictional damping is formed between the input part (101) and output part (102) of the pendulum rocker damper (100), characterized in that at least one friction device ( 111, 112) in the axial direction with respect to the axis of rotation (15) inside the flywheel (113) and / or at least one friction device (111, 112) in the axial direction with respect to the axis of rotation (15) outside of the pendulum rocker damper (100). Pendulum rocker damper assembly (108) Claim 1 , in which a first friction device (112) is formed which comprises a first friction ring (114), a first support disc (116), a first retaining plate (120) and a first plate spring (115), the first friction ring (114) being non-rotatable with the output part (102) and the first disc spring (115) and the first retaining plate (120) are connected to the input part (101) in a rotationally fixed manner, the first support disk (116) in the axial direction relative to the axis of rotation (15) between the first Disk spring (115) and the first retaining plate (120) is formed, the first friction ring (114) being formed in the axial direction with respect to the axis of rotation (15) between the first support disc (116) and the first retaining plate (120) and the first The disc spring (115) exerts a force on the first support disk (116) in the direction of the first holding plate (120), which force presses the first support disk (116) against the first friction ring (114). Pendulum rocker damper assembly (108) Claim 2 , in which the first friction ring (114) is non-rotatably connected to a hub element (117) of the output part (102) via a support plate (119). Pendulum rocker damper arrangement (108) according to one of the preceding claims, in which a second friction device (111) is formed which has a second friction ring (121) which is non-rotatably connected to the output part (102), the second friction device (111) furthermore having a has a second disc spring (122) and a second retaining plate (124), which are non-rotatably connected to the input part (101), and a second support disc (123), the second friction ring (121) in the axial direction relative to the axis of rotation (15) is formed between the second support plate (123) and the second holding plate (124) and the second plate spring (122) exerts a force on the second support plate (123) in the direction of the second holding plate (124) which the second support plate (123) counteracts presses the second friction ring (121). Pendulum rocker damper assembly (108) Claim 4 , in which the second friction ring (121) is non-rotatably connected to an outer circumference (128) of a hub element (17) of the output part (102). Pendulum rocker damper arrangement (108) according to one of the preceding claims, in which a first friction device (112) with a first friction ring (114) and a second friction device (111) with a second friction ring (121) are formed and the second friction ring (121) is based on the axis of rotation (15) is formed concentrically within the first friction ring (114). Pendulum rocker damper arrangement (108) according to one of the preceding claims, in which the flywheel (113) and the input part (101) of the pendulum rocker damper (100) are connected to one another by a form-fitting connection. Hybrid drive train (1), comprising an internal combustion engine (4) with a crankshaft (14) and at least one electric drive machine (13), in which a pendulum rocker damper arrangement (108) is formed according to one of the preceding claims, in which the flywheel (113) and the The input part (101) of the pendulum rocker damper (108) is non-rotatably connected to the crankshaft (14). Motor vehicle (2), comprising a hybrid drive train (1) according to Claim 8 . Motor vehicle (2), comprising a pendulum rocker damper arrangement (108) according to one of the Claims 1 until 7th .

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