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DE-102025109130-A1 - Torque limiter for the hybrid powertrain of a motor vehicle

DE102025109130A1DE 102025109130 A1DE102025109130 A1DE 102025109130A1DE-102025109130-A1

Abstract

The present invention relates to a torque limiter (1) for a hybrid powertrain of a motor vehicle, comprising an input-side carrier disc (7) having openings (8) distributed around the circumference (U) of the torque limiter (1), into which friction lining elements (6) are positively engaged, with two side parts (11, 12) arranged opposite each other on opposite sides (9, 10) of the carrier disc (7), and with a disc spring (13) pressing a first of these side parts (11, 12) frictionally against first end faces of the friction lining elements (6), wherein the disc spring (13) bears directly against second end faces of the friction lining elements (6) opposite the first end faces in the axial direction (A) of the torque limiter (1) or acts indirectly on them via a pressure plate, wherein a ratio of the thickness measured in the axial direction (A) between the two end faces of a respective friction lining element (6) (19) of the friction lining element (6) to a thickness (20) of the carrier disc (7) measured in the axial direction (A) is greater than 1.05.

Inventors

  • Matthias Dannhäuser
  • Christophe ACKER
  • Uwe Weller
  • Eduard Wagner

Assignees

  • Schaeffler Technologies AG & Co. KG

Dates

Publication Date
20260513
Application Date
20250311
Priority Date
20241111

Claims (10)

  1. Torque limiter (1) for a hybrid powertrain of a motor vehicle, comprising an input-side carrier disc (7) having openings (8) distributed in the circumferential direction (U) of the torque limiter (1), into which friction lining elements (6) are positively engaged, with two side parts (11, 12) arranged opposite each other on opposite sides (9, 10) of the carrier disc (7), and with a disc spring (13) pressing a first of these side parts (11, 12) frictionally against first end faces of the friction lining elements (6), wherein the disc spring (13) bears directly against second end faces of the friction lining elements (6) opposite the first end faces in the axial direction (A) of the torque limiter (1) or acts indirectly on them via a pressure plate, wherein a ratio of the thickness (19) measured in the axial direction (A) between the two end faces of a respective friction lining element (6) of the The thickness (20) of the carrier disc (7) measured in the axial direction (A) of the friction lining element (6) is greater than 1.05.
  2. Torque limiter (1) according to Claim 1 , where the ratio is less than 2.
  3. Torque limiter (1) according to Claim 1 or 2 , where the ratio is in the range of 1.5.
  4. Torque limiter (1) after one of the Claims 1 until 3 , wherein an extent (21) of each of the friction lining elements (6) in the radial direction (R) of the torque limiter (1) is greater than an extent (22) of each of the friction lining elements (6) in the tangential direction (T) of the torque limiter (1).
  5. Torque limiter (1) after one of the Claims 1 until 4 , wherein each of the friction lining elements (6) has a rectangular base area when viewed in the axial direction (A).
  6. Torque limiter (1) according to Claim 5 , wherein each of the friction lining elements (6) has a square base area when viewed in the axial direction (A).
  7. Torque limiter (1) after one of the Claims 1 until 4 , wherein each of the friction lining elements (6) is convex when viewed in the axial direction (A).
  8. Torque limiter (1) according to Claim 7 , wherein each of the friction lining elements (6) has an oval base area when viewed in the axial direction (A).
  9. Torque limiter (1) according to Claim 7 , wherein each of the friction lining elements (6) is circular when viewed in the axial direction (A).
  10. Torque limiter (1) according to Claim 7 , wherein each of the friction lining elements (6) is elliptically shaped when viewed in the axial direction (A).

Description

The present invention relates to a torque limiter, in particular a dry-running torque limiter, for a hybrid powertrain of a motor vehicle. Such torque limiters are currently rather oversized for their actual function because the technology is largely derived from friction clutch technology, i.e., the technology of starting/gear-shifting clutches. The object of the present invention is to provide a cost-optimized torque limiter. According to the invention, this problem is solved by a torque limiter for a hybrid powertrain of a motor vehicle according to claim 1, comprising an input-side carrier disc which has perforations distributed in the circumferential direction of the torque limiter into which friction lining elements are positively inserted, with two side parts arranged opposite each other on opposite sides of the carrier disc, and with a disc spring which presses a first of these side parts frictionally against first end faces of the friction lining elements, wherein the disc spring bears directly against second end faces of the friction lining elements opposite the first end faces in the axial direction of the torque limiter or acts on them indirectly via a pressure disc. Since the ratio of the thickness of the friction lining element measured in the axial direction between the two end faces of a respective friction lining element to the thickness of the carrier disc measured in the axial direction is greater than 1.05, the torque limiter can be manufactured cost-effectively. Preferably the ratio is less than 2, so that the torque limiter can be manufactured cost-effectively. Preferably, the ratio is in the range of 1.5, so that the torque limiter can be manufactured cost-effectively. It is advantageous if the extent of each of the friction lining elements in the radial direction of the torque limiter is greater than the extent of each of the friction lining elements in the tangential direction of the torque limiter, which allows the torque limiter to be manufactured cost-effectively. Preferably, each of the friction lining elements has a rectangular base area when viewed in the axial direction, so that the torque limiter can be manufactured cost-effectively. Furthermore, preferably each of the friction lining elements has a square base area when viewed in the axial direction, so that the torque limiter can be manufactured cost-effectively. It is advantageous if each of the friction lining elements is convex when viewed in the axial direction, which makes it possible to manufacture the torque limiter cost-effectively. It is also advantageous if each of the friction lining elements has an oval base area when viewed in the axial direction, which makes it possible to manufacture the torque limiter cost-effectively. Alternatively, it is advantageous if each of the friction lining elements is circular when viewed in the axial direction, which allows the torque limiter to be manufactured cost-effectively. Alternatively, it is advantageous if each of the friction lining elements is elliptically shaped when viewed in the axial direction, which makes it possible to manufacture the torque limiter cost-effectively. The present invention is explained in more detail below with reference to preferred embodiments in conjunction with the accompanying figures. These show: 1 : a first embodiment of a torque limiter in whose input-side carrier disc round friction lining elements are positively embedded, in a half perspective sectional view, 2 : the torque limiter off 1 in a top view, with the disc spring and second side part removed to allow a view of the carrier disc with its friction lining elements, 3 : the carrier disc of the torque limiter from the 1 and 2 with friction lining element in a sectional view, 4 : the carrier disc of a second embodiment of a torque limiter, into which square friction lining elements are positively embedded, in a top view, 5 : the carrier disc made of 4 in a perspective view, 6 : the carrier disc of a third embodiment of a torque limiter, into which rectangular friction lining elements are formed are logically embedded, in a top view, and 7 : the carrier disc made of 6 in a perspective view. The 1 to 7 This document describes preferred embodiments of a torque limiter 1 for a hybrid powertrain of a motor vehicle, comprising an input-side carrier disc 7 with openings 8 distributed in the circumferential direction U of the torque limiter 1, into which friction lining elements 6 are positively engaged, as well as embodiments of such input-side carrier discs 7 that can be used in such a torque limiter 1. The friction lining elements 6 positively engaged in the openings 8 of the carrier disc 7 are also referred to as lining inlays. In particular, with reference to the 4 to 7 Only the differences of the carrier discs 7 shown there are described, whereby it is clear that these carrier discs 7 are each in the one shown in the 1 and 2 The torque limiter 1 shown can and will be used. Identical fea