Torsional vibration damper with a mounting element for demarcating a damper interior

Abstract

Torsional vibration damper (10) for a vehicle drive train and comprising a damper inlet (16) rotatable about a pivot axis (14), a damper outlet (22) which is rotatable to a limited extent against the spring force of at least one spring element (24) relative to the damper inlet (16) with a damper outlet component (30), a damper interior (54) accommodating the spring element (24) and at least partially fillable with a lubricant, a first contact element (56) defining the damper interior (54) with a first contact surface (62) coming into contact with a second contact surface (64) of a connecting component (60) for sealing the damper interior (54), wherein the damper inlet (16) has a primary flywheel (18) and a cover disk (20) connected to the primary flywheel (18), and wherein the damper interior (54) is defined by the primary flywheel (18), the cover disk (20), the first contact element (56), and a second contact element (58), wherein the first contact element (56) and the second contact element (58) each bear against the connecting component (60) designed as a damper outlet component (30), and wherein the second contact element (58) is arranged axially opposite the first contact element (56) with respect to the damper outlet component (30) and has a third contact surface (70).wherein the third contact surface (70) abuts a fourth contact surface (72) of the connecting component (60), and wherein at least one of the contact surfaces (62, 64) is at least partially convex, characterized in that a spring component (78) is pre-tensioned relative to the damper output component (30) which is integrally formed with a torque limiter input (34) of a torque limiter (32) such that the spring force applied by the spring component (78) acts on the third contact surface (70) and the fourth contact surface (72) and, via the axially limited movable damper output component (30), also on the first contact surface (62) and the second contact surface (64), and wherein the second contact element (58) has a further contact surface (84), wherein the second contact element (58) is connected to the spring component with the further contact surface (84) provided on the side of the second contact element (58) axially opposite the third contact surface (70). (78) is attachedand that the second attachment element (58) has a centering area (92), wherein the second attachment element (58) is centered on the cover plate (20) via the centering area (92) which abuts an inner circumference (94) of the cover plate (20).

Description

[0001] The invention relates to a torsional vibration damper according to the preamble of claim 1.

[0002] German patent DE 10 2020 129 530 A1 describes a torsional vibration damper with a damper inlet rotatable about an axis of rotation and a damper outlet rotatable relative to the damper inlet against the spring force of a spring element. The spring element is housed in a damper interior which is sealed by a contact element. The contact element comprises a friction ring arranged axially between the damper inlet and the damper outlet and preloaded by a disc spring.

[0003] German patent DE 10 2014 216 299 A1 discloses a torsional vibration damper for a vehicle drivetrain in which the damper interior, which houses the spring element and lubricant, is sealed by means of water-permeable grease seals. The respective grease seal is tubular and resiliently spring-loaded and is clamped between the flange and the housing of the primary part.

[0004] German patent DE 10 2017 123 782 A1 discloses a torsional vibration damper whose arc spring channel is sealed by diaphragm rings inserted on both sides between the flange disc. The diaphragm rings seal against the flange disc with pre-tensioned spring elements and are held against rotation on the primary housing at the rear.

[0005] DE 10 2017 207 031 A1 describes a torsional vibration damper in which a damper channel with a planetary coupling gear is sealed by means of radial shaft seals having convex contact surfaces. DE 10 2021 111 024 A1 discloses a torsional vibration damper against whose arc spring flange friction rings with convex contact surfaces are preloaded. The friction rings are supported on the rear side of the primary housing. The object of the present invention is to ensure that any tilting of the damper outlet relative to the mounting element has as little or no effect on the damping characteristics of the torsional vibration damper as possible. The torsional vibration damper should also be designed to be cost-effective and space-saving.

[0006] At least one of these tasks is solved by a torsional vibration damper having the features according to claim 1.

[0007] This allows the damper outlet to tilt relative to the mounting element, minimizing or completely eliminating any adverse effects on the damping characteristics. The number of components in the torsional vibration damper can be reduced.

[0008] The vehicle can be a motor vehicle. For propulsion, the vehicle can have at least one drive element, preferably an internal combustion engine or an electric motor. The drivetrain can be a hybrid drivetrain with an internal combustion engine as the drive element and an electric motor as a further drive element.

[0009] The torsional vibration damper can be designed as a dual-mass flywheel. The damper inlet can have a primary flywheel and / or a cover plate.

[0010] The damper output can include a torque limiter. The damper output component can be rigidly connected to a torque limiter input of the torque limiter, in particular by being a single piece. The damper output component can be designed as a disc spring flange.

[0011] The lubricant can be a lubricating oil or a lubricating grease.

[0012] The first and / or second contact surfaces are convex. Preferably, the first and / or second contact surface can be completely convex, meaning free of any flat surface.

[0013] The contact element can be a friction ring, in particular a flange ring. The contact element can be made of plastic. The contact element can be arranged radially inside the spring element. The contact element can be arranged axially overlapping the spring element. This allows the axial installation space of the torsional vibration damper to be reduced.

[0014] In a preferred embodiment of the invention, it is advantageous if the first assembly element comprises an elastomer component on which the first contact surface is formed. The elastomer component can be an O-ring.

[0015] In a preferred embodiment of the invention, the first mounting element comprises a receiving element in which the elastomer component is received. The receiving element can abut the damper inlet on a side axially opposite the first contact surface with a further contact surface.

[0016] In an advantageous embodiment of the invention, the connecting component is the damper outlet component. This allows the first mounting element to be in direct contact with the damper outlet component.

[0017] In a specific embodiment of the invention, it is advantageous if the first contact surface is an axial side surface of the contact element and / or the second contact surface is an axial side surface of the connecting component. This allows the first contact element to bear axially against the connecting component.

[0018] In a preferred embodiment of the invention, it is advantageous if a second contact element is arranged axially opposite the first contact element with respect to the damper outlet component and has a third contact surface that abuts a fourth contact surface of the connecting component. This allows the connecting component to be arranged axially between the first and second contact elements. The second contact element can have a further contact surface on a side axially opposite the third contact surface, which abuts the damper inlet or a spring component.

[0019] In a particular embodiment of the invention, it is advantageous if the fourth contact surface is an axial side surface of the connecting component that is axially opposite the second contact surface. This allows the connecting component to be arranged directly axially between the first and second contact elements. The third contact surface can be an axial side surface of the second contact element.

[0020] In a preferred embodiment of the invention, it is advantageous if the first mounting element is mirror-symmetrical with respect to an axial plane having the axis of rotation as its normal. This allows the first mounting element to be manufactured cost-effectively and reduces the errors associated with assembling the torsional vibration damper.

[0021] In a specific embodiment of the invention, it is advantageous if the first contact element has a further contact surface on a side axially opposite the first contact surface, which rests against the damper inlet. This allows the number of components of the torsional vibration damper to be reduced. The damper interior can be delimited cost-effectively. The contact element can be arranged axially directly between the damper outlet component and the damper inlet.

[0022] In an advantageous embodiment of the invention, the first contact element is preloaded relative to the connecting element by at least one spring component. Alternatively or additionally, the second contact element can be preloaded relative to the connecting element by at least one spring component. The spring component can comprise a disc spring. The spring component can be arranged axially between the first contact element and the damper inlet. The spring component can preload the contact surfaces in contact with each other.

[0023] Further advantages and advantageous embodiments of the invention will become apparent from the description of the figures and the illustrations. Character description

[0024] The invention is described in detail below with reference to the illustrations. These show, in detail: Fig. 1: A half section of a torsional vibration damper in a special embodiment of the invention. Fig. 2: A section of the torsional vibration damper made of Fig. 1 in an enlarged view. Fig. 3: A cross-section of a section of a torsional vibration damper in a further special embodiment of the invention. Fig. 4: A cross-section of a section of a torsional vibration damper in a further special embodiment of the invention.

[0025] Fig. Figure 1 shows a half-section of a torsional vibration damper in a special embodiment of the invention. The torsional vibration damper 10 is designed as a dual-mass flywheel 12 and comprises a damper inlet 16 rotatable about a pivot axis 14. The damper inlet 16 comprises a primary flywheel 18 and a cover plate 20 connected thereto. The damper inlet 16 is detachably connected to a drive element, for example, an internal combustion engine.

[0026] The torsional vibration damper 10 further comprises a damper outlet 22, which is rotatable relative to the damper inlet 16 against the spring force of at least one spring element 24. The spring element 24 comprises at least one coil spring 26, which preferably has an outer spring and an inner spring. The spring element 24 is, for example, a coil spring 28.

[0027] The damper outlet 22 has a damper outlet component 30, which is force-transmittingly coupled to the spring element 24. The damper outlet 22 includes a torque limiter 32 with a torque limiter input 34, which is integrally formed with the damper outlet component 30. Friction linings 36 are axially attached to both sides of the torque limiter input 34 and can be frictionally connected to a torque limiter output 38 for torque transmission limited to a maximum torque.

[0028] The torque limiter output 38 comprises a side disc 40, which can be frictionally connected to one friction lining 36, and a support disc 42, which can be frictionally connected to the other friction lining 36. The side disc 40 and the support disc 42 are radially fastened to each other within the friction linings 36 by at least one fastening element 44, here a rivet element 46. Furthermore, an output element 48, here an output hub 50, is fastened to the torque limiter output 38 via the fastening element 44. The output hub 50 has internal teeth 52 for torque transmission, for example, to a transmission input shaft.

[0029] The spring element is housed in a damper chamber 54. The damper chamber 54 may be at least partially filled with a lubricant. The damper chamber 54 is delimited by the primary flywheel 18 and the cover plate 20, and further by a first contact element 56 and a second contact element 58. The first and second contact elements 56 and 58 each bear against a connecting component 60, in this case the damper outlet component 30.

[0030] Fig. Figure 2 shows a section of the torsional vibration damper. Fig. Figure 1 shows an enlarged view. The first assembly element 56 comprises a first contact surface 62, which comes into contact with a second contact surface 64 of the damper outlet component 30 to seal the damper interior 54. The first contact surface 62 is located on an axial side surface 66 of the first assembly element 56, and the second contact surface 64 is located on an axially adjacent axial side surface 68 of the damper outlet component 30.

[0031] The first contact surface 62 is at least partially convex, which means that a tilting of the damper output component 30, indicated here in the drawing, has less influence on the damping properties of the torsional vibration damper 10, especially since the friction between the first and second contact surfaces 62, 64 is uniform and controlled and is less or not excessively increased by the tilting of the damper output component 30.

[0032] The second assembly element 58 comprises a third contact surface 70, which comes into contact with a fourth contact surface 72 of the damper outlet component 30 for further sealing of the damper interior 54. The third contact surface 70 is located on an axial side surface 74 of the second assembly element 58, and the fourth contact surface 72 is located on an axial side surface 76 of the damper outlet component 30 that is axially adjacent to and axially opposite the second contact surface 64.

[0033] A spring component 78, here a disc spring 80, clamps the second contact element 58 relative to the damper output component 30. As a result, a spring force applied by the spring component 78 acts on the third and fourth contact surfaces 70, 72, and also, via the axially limited movable damper output component 30, on the first and second contact surfaces 62, 64.

[0034] The first contact element 56 rests against the damper inlet 16, here the primary flywheel 18, with a further contact surface 82 located on the side of the first contact element 56 axially opposite the first contact surface 62. The second contact element 58 rests against the spring component 78 with a further contact surface 84 located on the side of the second contact element 58 axially opposite the third contact surface 70.

[0035] The first mounting element 56 has a centering area 86, via which the first mounting element 56 is centered on the primary flywheel 18. For this purpose, a shoulder 88 is provided on the first mounting element 56, which is received on a shoulder 90 also arranged on the primary flywheel 18.

[0036] The second mounting element 58 has a further centering area 92, via which the second mounting element 58 is centered on the cover plate 20. The centering area 86 rests against an inner circumference 94 of the cover plate 20.

[0037] Fig. Figure 3 shows a cross-section of a section of a torsional vibration damper in a further specific embodiment of the invention. The torsional vibration damper 10 is constructed identically to that shown in Figure 3. Fig. 1 except for the differences specified below. The first contact element 56 is designed as a mirror image with respect to an axial plane 96 which has the axis of rotation as its normal. This means that the further contact surface 82 is also convex.

[0038] The first mounting element 56 rests radially on the shoulder 90 of the primary flywheel 18.

[0039] Fig. Figure 4 shows a cross-section of a section of a torsional vibration damper in a further specific embodiment of the invention. The torsional vibration damper 10 is constructed identically to that shown in Figure 4. Fig. 1 except for the differences specified below. The first system element 56 has an elastomer component 98 on which the first contact surface 62 is provided. The second system element 58 has a further elastomer component 100 on which the third contact surface 70 is provided.

[0040] The first system element 56 has a receiving element 102 in which the elastomer component 98 is received. The second system element 58 has a further receiving element 104 in which the further elastomer component 100 is received.

[0041] The receiving element 102 rests on one of the first contact surfaces 62 axially opposite the side of the first mounting element 56, with its further contact surface 82 abutting the damper inlet 16. The further receiving element 104 rests on one of the third contact surfaces 70 axially opposite the side of the second receiving element 58, with its further contact surface 84 abutting the spring component 78. Reference symbol list 10 torsional vibration dampers 12 Dual-mass flywheel 14 axis of rotation 16 Damper Inlet 18 Primary flywheel 20 Cover disc 22 Damper outlet 24 spring element 26 coil spring 28 Bow feather 30 Damper output component 32 torque limiters 34 Torque limiter input 36 friction lining 38 Torque limiter output 40 side window 42 Support disc 44 Fastening element 46 rivet element 48 Output element 50 Output hub 52 Internal teeth 54 Damper interior 56 first plant element 58 second plant element 60 Connecting component 62 first contact surface 64 second contact surface 66 axial side surface 68 axial side surface 70 third contact surface 72 fourth contact surface 74 axial side surface 76 axial side surface 78 Spring component 80 Belleville washers 82 additional contact surfaces 84 additional contact surfaces 86 Centering area Paragraph 88 Paragraph 90 92 additional centering area 94 inner circumference 96 Axial plane 98 Elastomer component 100 more elastomer components 102 Recording element 104 additional recording element

Claims

[1] Torsional vibration damper (10) for a vehicle drive train and comprising a damper inlet (16) rotatable about a pivot axis (14), a damper outlet (22) which is rotatable to a limited extent against the spring force of at least one spring element (24) relative to the damper inlet (16) with a damper outlet component (30), a damper interior (54) accommodating the spring element (24) and at least partially fillable with a lubricant, a first contact element (56) defining the damper interior (54) with a first contact surface (62) coming into contact with a second contact surface (64) of a connecting component (60) for sealing the damper interior (54), wherein the damper inlet (16) has a primary flywheel (18) and a cover disk (20) connected to the primary flywheel (18), and wherein the damper interior (54) is defined by the primary flywheel (18), the cover disk (20), the first contact element (56), and a second contact element (58), wherein the first contact element (56) and the second contact element (58) each bear against the connecting component (60) designed as a damper outlet component (30), and wherein the second contact element (58) is arranged axially opposite the first contact element (56) with respect to the damper outlet component (30) and has a third contact surface (70).wherein the third contact surface (70) abuts a fourth contact surface (72) of the connecting component (60), and wherein at least one of the contact surfaces (62, 64) is at least partially convex, characterized by, that a spring component (78) is pre-tensioned relative to the damper output component (30) which is integrally formed with a torque limiter input (34) of a torque limiter (32) such that the spring force applied by the spring component (78) acts on the third contact surface (70) and the fourth contact surface (72) and, via the axially limited movable damper output component (30), also on the first contact surface (62) and the second contact surface (64), and wherein the second contact element (58) has a further contact surface (84), wherein the second contact element (58) bears against the spring component (78) with the further contact surface (84) provided on the side of the second contact element (58) axially opposite the third contact surface (70), and that the second contact element (58) has a centering area (92),wherein the second mounting element (58) is centered on the cover disc (20) via the centering area (92) which abuts an inner circumference (94) of the cover disc (20). [2] Torsional vibration damper (10) according to claim 1, characterized by , that the first system element (56) has an elastomer component (98) on which the first contact surface (62) is provided. [3] Torsional vibration damper (10) according to claim 2, characterized by , that the first system element (56) has a receiving element (102) in which the elastomer component (98) is received. [4] Torsional vibration damper (10) according to any one of the preceding claims, characterized by , that the first contact surface (62) is an axial side surface (66) of the attachment element and / or the second contact surface (64) is an axial side surface (68) of the connecting component (60). [5] Torsional vibration damper (10) according to claim 1, characterized by, that the fourth contact surface (72) is an axially opposite side surface (76) of the connecting component (60) to the second contact surface (64). [6] Torsional vibration damper (10) according to any one of the preceding claims, characterized by , that the first system element (56) is designed in a mirror-symmetric manner with respect to an axial plane (96) having the axis of rotation (14) as its normal. [7] Torsional vibration damper (10) according to any one of the preceding claims, characterized by , that the first attachment element (56) has a further contact surface (82) on one of the first contact surfaces (62) axially opposite the side of the first attachment element (56), which is in contact with the damper inlet (16). [8] Torsional vibration damper (10) according to any one of the preceding claims, characterized by , that the first installation element (56) is clamped against the connecting element (60) by at least one spring component (78).

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