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DE-102024132816-A1 - Torsional vibration damper with spoke springs

DE102024132816A1DE 102024132816 A1DE102024132816 A1DE 102024132816A1DE-102024132816-A1

Abstract

The invention relates to a torsional vibration damper (10) for reducing torsional vibrations in a drive train of a vehicle, comprising an inner component (14) rotatable about an axis of rotation (12), several circumferentially spaced spoke springs (16), an outer component (18) rotatably connected to the inner component (14) via the spoke springs (16) and rotatable to a limited extent relative to the inner component (14) against a spring force of the spoke springs (16), and at least one friction element (42) arranged frictionally between the inner component (14) and the outer component (18), wherein at least one of the spoke springs (16) is coupled to the friction element (42) by forming a free angle (50) which allows rotation between the spoke spring (16) and the at least one friction element (42).

Inventors

  • Bertrand Fischbach
  • Jean Sieffert

Assignees

  • Schaeffler Technologies AG & Co. KG

Dates

Publication Date
20260513
Application Date
20241111

Claims (10)

  1. Torsional vibration damper (10) for reducing torsional vibrations in a drive train of a vehicle, comprising an inner component (14) rotatable about an axis of rotation (12), several circumferentially spaced spoke springs (16), an outer component (18) rotatably connected to the inner component (14) via the spoke springs (16) and rotatable to a limited extent against a spring force of the spoke springs (16) relative to the inner component (14), at least one friction element (42) arranged frictionally between the inner component (14) and the outer component (18), characterized in that at least one of the spoke springs (16) is coupled to the friction element (42) forming a free angle (50) which allows rotation between the spoke spring (16) and the at least one friction element (42).
  2. Torsional vibration damper (10) according Claim 1 , characterized in that the spoke spring (16) engages in a form-fitting manner with the friction element (42) while forming the clearance angle (50).
  3. Torsional vibration damper (10) according Claim 1 or 2 , characterized in that the clearance angle (50) specifies a maximum rotation angle (70) between the inner component (14) and the outer component (18).
  4. Torsional vibration damper (10) according Claim 3 , characterized in that the maximum angle of rotation (70) between the spoke spring (16) and the friction element (42) is determined by a stop (76) of the spoke spring (16) on the friction element (42).
  5. Torsional vibration damper (10) according to one of the preceding claims, characterized in that the friction element (42) is connected to the inner component (14) or the outer component (18) in a rotationally fixed manner and bears against the outer component (18) or inner component (14) in a frictionally effective manner.
  6. Torsional vibration damper (10) according to one of the preceding claims, characterized in that the coupling (61) is arranged at least partially radially overlapping with the outer component (18).
  7. Torsional vibration damper (10) according to one of the preceding claims, characterized in that the friction element (42) has at least one cranked section (54) with at least one recess (52) on an outer circumference (56), into which the spoke spring (16) engages in a form-fitting manner, forming the clearance angle (50).
  8. Torsional vibration damper (10) according Claim 7 , characterized in that the recess (52) on the outer circumference (56) is open radially outwards.
  9. Torsional vibration damper (10) according Claim 7 or 8 , characterized in that a stop surface (78) for the contact of the spoke spring (16) at a maximum angle of rotation (70) is provided on the cranked section (54) in circumferential direction (28) opposite the spoke spring (16).
  10. Torsional vibration damper (10) according to one of the preceding claims, characterized in that the friction element (42) is designed as a diaphragm spring (44) or disc spring.

Description

The invention relates to a torsional vibration damper according to the preamble of claim 1. In DE 10 2016 207 100 A1 A vibration damper with spoke springs is described, arranged between an outer ring forming a damping mass and a mounting disc for attachment to a shaft. The outer ring bears against a friction surface, thus providing friction. The object of the present invention is to protect the spoke springs from overloading. Excessive twisting angles between the inner and outer components are to be prevented. 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 built more robustly and to reduce torsional vibrations more effectively. The spoke springs can be protected from overloading. The vehicle can be a motor vehicle, a truck, or a two-wheeled vehicle. 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 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. The torsional vibration damper can be a torsional vibration absorber that is arranged in parallel to a torque transmission path between the drive element and the driven element. 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 outer component can be at least partially integrated with the spoke spring(s). The inner component and/or the outer component can be composed of several parts. The spoke springs can be manufactured as a single unit. The friction element can generate friction during a rotational movement between the inner and outer components. This can dampen resonant vibrations. The friction element can make 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, the inner component, or on a component that is rotationally fixed to each of them. The spoke spring can have a greater radial extension than its axial and/or circumferential extension. The spoke spring can be connected to at least one other spoke spring radially outward, in particular via an outer ring, and/or radially inward, in particular via an inner ring. The outer ring can be associated with the outer component. The inner ring can be associated with the inner component. The spoke spring, together with other circumferentially offset spoke springs connected to it via the outer ring and/or the inner ring, can form a spoke spring washer. The spoke spring washer can be a stamped component. The torsional vibration damper can have at least two such spoke spring washer units. The spoke spring washer units can be arranged axially offset from one another. The spoke spring washer units can be axially abutting one another. Starting from a neutral position, the spoke spring can be rotated relative to the friction element in only one or in both circumferential directions. The clearance angle can allow rotation of the spoke spring relative to the friction element in only one circumferential direction or in both circumferential directions. The spoke spring can be deflected relative to the friction element by the same amount, a lesser amount, or a greater amount in one circumferential direction than in the opposite circumferential direction. The coupling between the spoke spring and the friction element can be a positive-locking connection that allows limited rotation, particularly in both circumferential directions, within the clearance angle and, upon reaching the clearance angle, particularly in one circumferential direction or in the opposite circumferential direction, is a circumferentially effective positive-locking connection that prevents further rotation of the spoke spring relative to the friction element. The torsional vibration damper can have an additional friction element. The spoke spring can be coupled to the additional friction element, forming a clearance angle that allows rotation between the spoke spring and the additional friction element. The coupling can be a positive-locking connection that allows limited rotation within the clearance angle. The clearance angle can be the same as the clearance angle formed by the coupling between the spoke spring and the friction element. This allows the spoke spring to simultaneously bear against both the friction element and the additional friction element when the equivalent clearance angle is reached. The friction element and the additional friction element can be arran