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DE-102024110491-B4 - Slip clutch for motor vehicles

DE102024110491B4DE 102024110491 B4DE102024110491 B4DE 102024110491B4DE-102024110491-B4

Abstract

Slip clutch (1) for a motor vehicle, comprising a first clamping disc (2) and a second clamping disc (3) which together form an input part (4), and a friction disc (5) as an output part (6), wherein the input part (4) and the output part (6) have a common axis of rotation (D), wherein the friction disc (5) is arranged in the axial direction (A) of the slip clutch (1) between the clamping discs (2, 3) and is frictionally clamped, wherein the first clamping disc (2) has a plurality of first openings (7) distributed in the circumferential direction (U) of the slip clutch (1) and the second clamping disc (3) has a plurality of second openings (8) distributed in the circumferential direction (U), wherein the first openings (7) are offset in the circumferential direction (U) relative to the second openings (8) so that the openings (7, 8) of each clamping disc (2, 3) are covered by the respective other clamping disc (3, 2), and wherein The first clamping disc (2) and the second clamping disc (3) each have an inner area (9) in the radial direction (R) of the slip clutch (1) in which the first and second openings (7, 8) are arranged, and an outer area (10) in the radial direction (R) in which the first clamping disc (2) and the second clamping disc (3) have connection openings (11).

Inventors

  • Matthias Dannhäuser
  • Viktor Wiege

Assignees

  • Schaeffler Technologies AG & Co. KG

Dates

Publication Date
20260513
Application Date
20240415

Claims (9)

  1. Slip clutch (1) for a motor vehicle, comprising a first clamping disc (2) and a second clamping disc (3) which together form an input part (4), and a friction disc (5) as an output part (6), wherein the input part (4) and the output part (6) have a common axis of rotation (D), wherein the friction disc (5) is arranged in the axial direction (A) of the slip clutch (1) between the clamping discs (2, 3) and is frictionally clamped, wherein the first clamping disc (2) has a plurality of first openings (7) distributed in the circumferential direction (U) of the slip clutch (1) and the second clamping disc (3) has a plurality of second openings (8) distributed in the circumferential direction (U), wherein the first openings (7) are offset in the circumferential direction (U) relative to the second openings (8) so that the openings (7, 8) of each clamping disc (2, 3) are covered by the respective other clamping disc (3, 2), and wherein the first clamping disc (2) and the second clamping disc (3) each form an inner area (9) in the radial direction (R) of the slip clutch (1), in which the first and second openings (7, 8) are arranged and have a radially (R) outer area (10) in which the first clamping disc (2) and the second clamping disc (3) have connection openings (11).
  2. Slip clutch (1) after Claim 1 , wherein the first clamping disc (2) and the second clamping disc (3) are designed as identical parts.
  3. Slip clutch (1) after Claim 1 or 2 , wherein the inner areas (9) of the first clamping disc (2) and the second clamping disc (3) are projected in axial direction (A) relative to the respective outer areas (10) of the first clamping disc (2) and the second clamping disc (3).
  4. Slip clutch (1) after one of the Claims 1 until 3 , wherein the inner area (9) of the first clamping disc (2) and/or the inner area (9) of the second clamping disc (3) each has/have at least one groove (12) which frictionally engages/engages with the friction disc (5).
  5. Slip clutch (1) after one of the Claims 1 until 4 , wherein the first clamping disc (2) and the second clamping disc (3) are in contact with each other in the outer area (10).
  6. Slip clutch (1) after one of the Claims 1 until 5 , wherein the first clamping disc (2) and the second clamping disc (3) are connected to each other in the outer area (10) in a rotationally fixed and axially fixed manner.
  7. Slip clutch (1) after one of the Claims 1 until 6 , wherein the friction disc (5) has pad inserts (13) arranged in the circumferential direction (U) which are frictionally clamped between the first clamping disc (2) and the second clamping disc (3).
  8. Slip clutch (1) after one of the Claims 1 until 7 , wherein a torsional vibration damper (14) is provided with a primary part (15) and a secondary part (16) and at least one spring element (17), wherein the primary part (15) and the secondary part (16) are rotatable relative to each other against a spring force of the spring element (17) to a limited extent when a torque is transmitted in the circumferential direction (U), and wherein the friction disc (5) is connected to the primary part (15) in a rotationally fixed manner.
  9. Slip clutch (1) after Claim 8 , wherein the primary part (15) has at least two side discs (18, 19) spaced apart from each other in the axial direction (A), in which spring windows (20) for the spring elements (17) are formed, and wherein the friction disc (5) is formed integrally with at least one of the side discs (18).

Description

The present invention relates to a slip clutch for a motor vehicle, in particular for a motor vehicle with at least one electric motor as at least one drive unit, e.g., a hybrid vehicle. In particular, the slip clutch is used together with a torsional vibration damper. The slip clutch serves in particular as a torque limiter. A torque limiter is used primarily to protect a powertrain. It prevents torque exceeding a certain limit from being transmitted. For example, in hybrid powertrains, a torque limiter is located between the flywheel of the combustion engine and the torsional vibration damper on the transmission input shaft. The torque limiter's function is to protect components such as the transmission input shaft and other related drivetrain components from overload. These overloads can occur when excessive torque is generated or transmitted between the combustion engine and the transmission input shaft. Torque limiters of this type operate primarily on the friction principle. If the clamping force acting on the plates and friction linings is insufficient to transmit the torque exceeding a certain limit (slipping torque), the plates and friction linings slip relative to each other. When the torque falls below the specified limit again, no relative rotation occurs between the plates and friction linings, and the torque is transmitted completely. In particular, the clamping force (or the resulting slip torque) should remain constant during operation and throughout its service life. The clamping force is set during the manufacturing of the torque limiter. The object of the present invention is to provide a slip clutch that is easy to adjust, reliable and cost-effective. According to the invention, this problem is solved by a slip clutch for a motor vehicle according to claim 1, comprising a first clamping disc and a second clamping disc which together form an input part, and a friction disc as an output part, wherein the input part and output part have a common axis of rotation, and wherein the friction disc is arranged in the axial direction of the slip clutch between the clamping discs and is clamped by friction. Since the first clamping disc has a plurality of first openings distributed circumferentially around the slip clutch, and the second clamping disc has a plurality of second openings also distributed circumferentially, and since the first openings are offset circumferentially relative to the second openings, such that the openings of each clamping disc are covered by the other, the slip clutch can be adjusted cost-effectively. "Covered" in this context means that any pairs of first and second openings are not aligned with each other. The non-aligned first and second openings allow the insertion of pins from a first adjusting tool into the first openings on the side of the first clamping disc, and the insertion of pins from a second adjusting tool into the second openings on the side of the second clamping disc. By applying pressure to the two adjusting tools, the two clamping discs, preferably made of sheet metal, can be expanded relative to each other and their clamping force adjusted, thus enabling simple adjustment of the limiting torque of the slip clutch. Since the first clamping disc and the second clamping disc each have an inner area in the radial direction of the slip clutch, in which the first and second openings are arranged, and an outer area in the radial direction, in which the first clamping disc and the second clamping disc have connection openings, a cost-effective design of the slip clutch is made possible. Preferred embodiments are set out in the dependent claims. Preferably, the first clamping disc and the second clamping disc are designed as identical parts. This also enables a cost-effective design of the slip clutch. Furthermore, it is advantageous if the inner areas of the first and second clamping discs are axially flared relative to their respective outer areas. This also enables a cost-effective design of the slip clutch. Preferably the inner area of the first clamping disc and/or the The inner area of the second clamping disc has at least one groove that frictionally engages with the friction disc. This also enables a cost-effective design of the slip clutch. Furthermore, the first clamping disc and the second clamping disc preferably lie against each other in the outer area. This also enables a cost-effective design of the slip clutch. It is advantageous if the first clamping disc and the second clamping disc are connected to each other in a rotationally and axially fixed manner in the outer area, e.g., by riveting them together. This also enables a cost-effective design of the slip clutch. It is advantageous if the friction disc has circumferentially distributed lining inserts that are frictionally clamped between the first clamping disc and the second clamping disc. This also enables a cost-effective design of the slip clutch. Preferably, a torsional vibration dampe