Torsional vibration damper having an additional connection region

Abstract

The invention relates to a torsional vibration damper (10) for reducing torsional vibrations in the drive train of a vehicle, having an inner component (18) which can be rotated about an axis of rotation (16) and has a connection region (20) for connecting to a connection component (22) of the drive train at least for conjoint rotation therewith, a plurality of spoke springs (32) which are spaced apart from one another along the circumference, and an outer component (34) which is connected to the inner component (18) via the spoke springs (32) so as to rotate therewith and can be rotated to a limited extent against the spring force of the spoke springs (32) relative to the inner component (18), the inner component (18) also having an additional connection region (58), which is formed integrally with the inner component (18), for connecting to another rotatable connection component (80).

Description

[0001] P241416

[0002] -1-

[0003] Torsional vibration damper with an additional connection area

[0004] Description introduction

[0005] The invention relates to a torsional vibration damper according to the preamble of claim 1.

[0006] In DE 102016 207 100 A1 a vibration damper with spoke springs is described, which are arranged between an outer ring forming a damping mass and a mounting disc for attachment to a shaft.

[0007] The object of the present invention is to increase the functional integration of a torsional vibration damper. The torsional vibration damper is to be extended to include additional functions while maintaining the most compact dimensions and cost-effectiveness possible.

[0008] At least one of these tasks is solved by a torsional vibration damper with the features according to claim 1. This allows the torsional vibration damper to be extended by at least one connection with a rotatable additional connecting component, while still maintaining a compact and cost-effective design.

[0009] The vehicle can be a motor vehicle, a truck, or a two-wheeled vehicle.

[0010] The torsional vibration damper can be arranged between a drive element, in particular an internal combustion engine, and a driven element, in particular a transmission. The drive element can provide drive power for propelling the vehicle. The torsional vibration damper can be arranged on the crankshaft of an internal combustion engine.

[0011] The torsional vibration damper can transmit at least part of the torque from the drive element towards the driven element. The torsional vibration damper can be arranged in series in the torque transmission path between the drive element and the driven element. In this configuration, the spoke springs can transmit the torque between the drive element and the driven element.

[0012] The torsional vibration damper can be a torsional vibration absorber. The torsional vibration absorber can be connected in parallel to a torque transmission path between the drive element and the driven element, for example, arranged on one side of the crankshaft from which the drive power of the P241416 is derived.

[0013] -2-

[0014] internal combustion engine in the direction of an output element, in particular for the propulsion of the vehicle, or may be arranged on a side of the crankshaft opposite this side.

[0015] The powertrain can be a hybrid powertrain which, in addition to the drive element, for example the combustion engine, has at least one other drive element, in particular an electric motor.

[0016] The internal component can be connected to a primary or secondary mass. The external component can be connected to a secondary or primary mass. The torsional vibration damper can be a dual-mass flywheel. The internal component can be an input hub. The internal component can be connected to the crankshaft. The internal component can be rotatable concentrically with the crankshaft. The internal component can be composed of several parts.

[0017] The outer component can be manufactured as a single piece with at least some of the spoke springs. The outer component can be made up of several components.

[0018] Some or all of the spoke springs may be manufactured as a single piece. These one-piece spoke springs may form a spoke spring disc, which has an outer ring and / or inner ring through which the spoke springs of the disc are connected. The spoke springs may each have a greater radial extension than their axial and / or circumferential extension. Each spoke spring may be a stamped component. The spoke springs may be attached to the inner and / or outer component.

[0019] The torsional vibration damper can incorporate a friction element effectively between the inner and outer components. This friction element can generate friction during a torsional movement between the inner and outer components, thereby damping resonant vibrations. The friction element can be in contact with a friction surface. The friction element can be rotationally fixed to either the inner or outer component. The friction surface can be located on the outer component and / or the inner component, or on a component that is rotationally fixed to each of them.

[0020] The additional connecting component can be arranged parallel to the axis of rotation. The additional connecting component can be rotatably driven by the inner component. In this case, a torque can be transmitted from the connecting component via the connection area to the inner component and from the additional connection area to the additional connecting component. P241416

[0021] -3-

[0022] The internal component can be connected to the other connecting component via the further connection area, at least rotationally, and in particular securely. The internal component can be connected to the other connecting component via the further connection area by positive locking, force locking, and / or friction locking.

[0023] The internal component can be connected to the connecting component via the connection area by means of a form-fit, force-fit and / or friction-fit connection.

[0024] In a preferred embodiment of the invention, it is advantageous if the further connection area is a toothed section. The toothed section can be formed by a pinion. The toothed section can be arranged coaxially to the axis of rotation. The toothed section can be designed as an external toothed section on an outer circumference of the inner component. The toothed section can be designed as an internal toothed section on an inner circumference of the inner component.

[0025] In a preferred embodiment of the invention, the further connecting component is connected to the inner component via at least one gear that engages in the toothing. The teeth of the gear can engage with the teeth of the further connecting component.

[0026] In a preferred embodiment of the invention, the further connection area is a coupling area for coupling with a flexible coupling element. The coupling area can be a toothed section or a pulley. The flexible coupling element can connect the further connection component to the further connection area, in particular in a torque-transmitting manner.

[0027] In a preferred embodiment of the invention, it is advantageous if the flexible coupling element is a belt or a chain. If the flexible coupling element is a belt, the inner component can be frictionally connected to the other connecting component via the wider connection area. If the flexible coupling element is a chain, the inner component can be rotationally fixed to the other connecting component via the wider connection area.

[0028] In a specific embodiment of the invention, it is advantageous if the inner component has connecting means for a rotationally fixed connection with the connecting component. The connecting means can be located in the connection area. The connecting means can be a circumferentially limited recess. The recess can form a positive-locking connection together with a key on the connecting component. Alternatively, the connecting means can be formed by at least one key that engages positively in a circumferentially limited recess in the connecting component. P241416

[0029] -4-

[0030] In a specific embodiment of the invention, it is advantageous if the inner component can be connected to the connecting component in a rotationally fixed but axially displaceable manner via the connecting means. The connecting means can be a toothed connection. For example, the connecting means can be an internal or external toothed connection on the inner component.

[0031] A preferred embodiment of the invention is advantageous in which the inner component has an additional connection area formed integrally with the inner component for connection to a rotatable additional connection component. The additional connection area can be a toothed section. The toothed section can be formed by a pinion formed integrally with the inner component. The additional connection component can be connected to the inner component via at least one gear engaging in the toothed section. The additional connection area can be a further coupling area for coupling to a further flexible coupling element. The further flexible coupling element can be a belt or a chain. The additional connection area can be axially spaced from the connection area. The additional connection component can be arranged parallel to the axis of rotation.The additional connecting component can be rotatable parallel to the axis of the connecting component and / or the other connecting component. The additional connecting component can be rotatably driven by the inner component. In this case, a torque can be transmitted from the connecting component via the connection area to the inner component and via the additional connection area to the additional connecting component.

[0032] In a specific embodiment of the invention, it is advantageous if the connecting component is a crankshaft of an internal combustion engine. More generally, the connecting component can also be a shaft or a flange effectively located within the drive train. The shaft or flange can be arranged within or parallel to a torque transmission of a drive torque in the drive train.

[0033] In a preferred embodiment of the invention, it is advantageous if the additional connecting component is a camshaft or a balance shaft of the internal combustion engine. The additional connecting component can be a balance shaft or a camshaft of the internal combustion engine.

[0034] Further advantages and advantageous embodiments of the invention will become apparent from the description of the figures and the illustrations. P241416

[0035] -5-

[0036] Character description

[0037] The invention is described in detail below with reference to the illustrations. These show, in detail:

[0038] Figure 1: A cross-section of a torsional vibration damper in a special embodiment of the invention.

[0039] Figure 2: A side view of a torsional vibration damper in a further special embodiment of the invention.

[0040] Figure 3: A spatial view of a torsional vibration damper arranged on an internal combustion engine in a further special embodiment of the invention.

[0041] Figure 1 shows a cross-section of a torsional vibration damper in a special embodiment of the invention. The torsional vibration damper 10 is arranged in a vehicle drive train, for example on a crankshaft 12 of an internal combustion engine, to reduce torsional vibrations of the crankshaft 12 and is designed as a torsional vibration damper 14, which is arranged parallel to a torque transmission path between the internal combustion engine and an output element, for example a gearbox.

[0042] The torsional vibration damper 10 comprises an internal component 18 rotatable about a rotational axis 16 and a connection area 20 for a rotationally fixed connection with a connecting component 22 of the drive train. The connection area 20 can be a clamping area 24, via which the internal component 18 is firmly and thus also rotationally fixed to the connecting component 22, for example by a central screw 26. The connecting component 22 is, for example, the crankshaft 12 or a component rigidly connected to the crankshaft 12. The clamping area 24 comprises an axial surface 28 on the internal component 18, which, due to the clamping force of the central screw 26, bears frictionally against an axially opposite axial surface 30 on the crankshaft 12.

[0043] Furthermore, the torsional vibration damper 10 comprises several circumferentially spaced spoke springs 32 and an outer component 34 which is rotatably connected to the inner component 18 via the spoke springs 32 and which is rotatable against a spring force of the spoke springs 32 relative to the inner component 18 within limits. The spoke springs 32 are radially connected to each other on the outside by an outer ring 36.

[0044] -6- and thus form a spoke spring disc 38. The torsional vibration damper 10 comprises several such spoke spring discs 38, which are arranged axially next to each other and are connected to the outer component 34 via the respective outer rings 36 by connecting elements 40, in particular rivet elements.

[0045] The spoke spring washers 38 each comprise an inner ring 42, which is formed as a single unit with the respective spoke springs 32 and the outer ring 36. The spoke spring washers 38 are connected to the inner component 18 via the respective inner ring 42 by further connecting elements 44, in particular rivet elements.

[0046] The outer component 34 consists of a first disc component 46 and a second disc component 48, which is axially spaced from the first and connected to it via the connecting elements 40. The spoke springs 32 are axially mounted between the first and second disc components 46, 48. The outer component 34 can thus act as a damping mass, which is elastically connected to the inner component 18 via the spoke springs 32.

[0047] A first friction element 50 and a second friction element 52, axially offset from it, are rigidly connected to the inner component 18 via the further connecting elements 44. The first friction element 50 bears against the first disc component 46 with a radially outer friction section 54, and the second friction element 52 bears against the second disc component 48 with a radially outer friction section 56. This allows resonance vibrations to be effectively damped by the torsional vibration damper 10. The spoke springs 32 are arranged axially between the first and second friction elements 50, 52.

[0048] The internal component 18 further comprises an integral connection area 58 for connection to a rotatable connection component. This connection area 58 is a toothed section 60, formed in particular by a pinion 62. The toothed section 60 forms a coupling area 64 for coupling to a flexible coupling element 66, for example, a chain 68. The connection component 68 can be a camshaft, which is rotationally fixed to the crankshaft 12 via the connection area 58 and the internal component 18.

[0049] Furthermore, the internal component 18 can have an additional connection area 70 axially offset from the further connection area 58 and formed in one piece with the internal component 18, which is in particular a toothing 71 formed in one piece with P241416

[0050] -7- is implemented in the inner component 18. The inner component 18 can be connected via the additional connection area 70 to another flexible coupling element 72, for example, another chain 74. The additional chain 74 can connect a rotatable additional connection component, for example, a balance shaft of the internal combustion engine, to the inner component 18 in a rotationally fixed manner. The balance shaft can then be connected to the crankshaft 12 in a rotationally fixed manner via the additional chain 74 and the additional connection area 20 and the inner component 18.

[0051] The inner component 18 has a connecting element 76, in this case a circumferentially limited recess 77, on an inner circumference into which a key 78 arranged on an outer circumference of the connecting component 22 can engage in a form-fitting manner. This allows the inner component 18 to be rotationally fixed relative to the connecting component 22, but axially displaceable, and the torsional vibration damper 10 to be arranged on the connecting component 22.

[0052] Figure 2 shows a side view of a torsional vibration damper in a further special embodiment of the invention. The torsional vibration damper 10 comprises the outer component 34 with the first disc component 46 and with the second disc component, which is fixedly connected to it via the connecting elements 40 and is concealed here, the spoke spring washers 38, which are concealed here, and the first friction element 50 and the second friction element, which are rotationally fixed to the inner component, which is concealed here, via the further connecting elements 44 and bear against the outer component 34 in a frictional manner.

[0053] Figure 3 shows a spatial view of a torsional vibration damper arranged on an internal combustion engine in a further special embodiment of the invention. The torsional vibration damper 10 is arranged with the inner component (hidden here) on a crankshaft 12 of an internal combustion engine 79. The inner component is connected via the further connection area (hidden here) to the flexible coupling element 66, here a chain 68, which connects the inner component to the rotatable further connection component 80, here a camshaft 82 of the internal combustion engine 79, in a rotationally fixed manner. The inner component is also connected via the additional connection area (hidden here) to the further flexible coupling element 72, here a further chain 74, which connects the inner component to the rotatable additional connection component 84, here a balance shaft 86 of the internal combustion engine, in a rotationally fixed manner. P241416

[0054] -8-

[0055] Reference symbol list

[0056] 10 torsional vibration dampers

[0057] 12 Crankshaft

[0058] 14 Torsional vibration dampers

[0059] 16 axis of rotation

[0060] 18 Interior component

[0061] 20 Connection area

[0062] 22 Connecting component

[0063] 24 clamping range

[0064] 26 Central screw

[0065] 28 Axial area

[0066] 30 Axial area

[0067] 32 spoke springs

[0068] 34 Exterior component

[0069] 36 outer ring

[0070] 38 spoke spring washer

[0071] 40 connecting element

[0072] 42 inner ring

[0073] 44 additional connecting element

[0074] 46 first disc component

[0075] 48 second disc component

[0076] 50 first friction element

[0077] 52 second friction element

[0078] 54 Friction section

[0079] 56 Friction section

[0080] 58 additional connection area

[0081] 60 toothing

[0082] 62 Sprocket P241416

[0083] -9-

[0084] 64 Coupling area

[0085] 66 flexible coupling element

[0086] 68 chain

[0087] 70 additional connection area 71 gearing

[0088] 72 additional flexible coupling elements

[0089] 74 more chains

[0090] 76 Fasteners

[0091] 77 Recess 78 Key

[0092] 79 Internal combustion engine

[0093] 80 additional connecting component

[0094] 82 Camshaft

[0095] 84 Additional connecting component 86 Balance shaft

Claims

P241416 -10- Patent claims 1. Torsional vibration damper (10) for reducing torsional vibrations in a drive train of a vehicle, comprising an inner component (18) rotatable about an axis of rotation (16) with a connection area (20) for at least rotationally fixed connection with a connecting component (22) of the drive train, several circumferentially spaced spoke springs (32), an outer component (34) rotatably connected to the inner component (18) via the spoke springs (32) and rotatable to a limited extent relative to the inner component (18) against a spring force of the spoke springs (32), characterized in that the inner component (18) further comprises a further connection area (58) formed integrally with the inner component (18) for connection with a rotatable further connecting component (80).

2. Torsional vibration damper (10) according to claim 1 , characterized in that the further connection area (58) is a toothing (60).

3. Torsional vibration damper (10) according to claim 2, characterized in that the further connecting component (80) can be connected to the inner component (18) via at least one gear which can engage in the toothing (60).

4. Torsional vibration damper (10) according to one of the preceding claims, characterized in that the further connection area (58) is a coupling area (64) for coupling with a flexible coupling element (66).

5. Torsional vibration damper (10) according to claim 4, characterized in that the flexible coupling element (66) is a belt or a chain (68).

6. Torsional vibration damper (10) according to one of the preceding claims, characterized in that the inner component (18) has connecting means (76) for a rotationally fixed connection with the connecting component (22). P241416 -11- 7. Torsional vibration damper (10) according to claim 6, characterized in that the inner component (18) can be rotated via the connecting means (76), but is axially displaceable when connected to the connecting component (22).

8. Torsional vibration damper (10) according to any one of the preceding claims, characterized in that the inner component (18) has an additional connection area (70) formed integrally with the inner component (18) for connection to a rotatable additional connecting component (84).

9. Torsional vibration damper (10) according to any one of the preceding claims, characterized in that the connecting component (22) is a crankshaft (12) of an internal combustion engine (79).

10. Torsional vibration damper (10) according to one of the preceding claims, characterized in that the further connecting component (80) is a camshaft (82) or a balance shaft (86) of the internal combustion engine (79).

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