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DE-102019128329-B4 - Torsional vibration damper with integrated disconnect coupling

DE102019128329B4DE 102019128329 B4DE102019128329 B4DE 102019128329B4DE-102019128329-B4

Abstract

Torsional vibration damper of a series hybrid powertrain of a vehicle, designed as a dual-mass flywheel installed between an internal combustion engine and an electric motor, wherein the torsional vibration damper (1) comprises a primary part (3) connected to a crankshaft of the internal combustion engine and a multi-part secondary part (4) coupled to an output shaft, which are elastically connected via arc springs (5) inserted in a spring channel (7) and connected to an arc spring flange (10), and the secondary part (4) includes a disconnecting clutch (2), wherein the disconnecting clutch (2), designed as a multi-disc clutch, comprises a clutch basket (12) positioned radially below the spring channel (7) and fixed in position on the arc spring flange (10), which can be coupled to an angled leg (15) of a hub flange (11) of the secondary part (4), wherein, when the disconnecting clutch (2) is closed, the disc pack (18) is in the clutch basket (12). a disc spring (20) in conjunction with a deflection lever (21, 34) is subjected to force, characterized in that the disc spring (20) is inserted between the hub flange (11) and the deflection lever (21), which is supported by frictional engagement on the disc pack (18) via circumferentially distributed fingers (25) guided through openings (24) of the hub flange (11).

Inventors

  • Roman Weisenborn

Assignees

  • Schaeffler Technologies AG & Co. KG

Dates

Publication Date
20260513
Application Date
20191021

Claims (8)

  1. Torsional vibration damper of a series hybrid powertrain of a vehicle, designed as a dual-mass flywheel installed between an internal combustion engine and an electric motor, wherein the torsional vibration damper (1) comprises a primary part (3) connected to a crankshaft of the internal combustion engine and a multi-part secondary part (4) coupled to an output shaft, which are elastically connected via arc springs (5) inserted in a spring channel (7) and connected to an arc spring flange (10), and the secondary part (4) includes a disconnecting clutch (2), wherein the disconnecting clutch (2), designed as a multi-disc clutch, comprises a clutch basket (12) positioned radially below the spring channel (7) and fixed in position on the arc spring flange (10), which can be coupled to an angled leg (15) of a hub flange (11) of the secondary part (4), wherein, when the disconnecting clutch (2) is closed, the disc pack (18) is in the clutch basket (12). a disc spring (20) in conjunction with a deflection lever (21, 34) is acted upon, characterized in that the disc spring (20) is inserted between the hub flange (11) and the deflection lever (21), which is supported by frictional engagement on the disc pack (18) via circumferentially distributed fingers (25) guided through openings (24) of the hub flange (11).
  2. Torsional vibration damper after a Claim 1 , characterized in that a disc pack (18) is incorporated in the clutch basket (12) of the disconnecting clutch (2), consisting of carrier plates (13) which are alternately connected to the hub flange (11) and the clutch basket (12) in a rotationally fixed manner and are each separated by a friction lining (14) and the disc pack (18) includes a pressure plate (19) on the arc spring flange side.
  3. Torsional vibration damper according to Claim 2 , characterized in that a friction lining (14) is attached to a carrier plate (13) by force, form and/or material connection.
  4. Torsional vibration damper according to one of the preceding claims, characterized in that a release bearing (26) designed as a CSC (Concentric Slave Cylinder) is used to actuate the disconnect clutch (2), which is connected to the deflection lever (21, 34) via a release bearing (27).
  5. Torsional vibration damper according to one of the preceding claims, characterized in that the secondary part (4) is rotatably mounted on an output shaft by means of a bearing (28) between the hub flange (11) and an output hub (29).
  6. Torsional vibration damper according to one of the preceding claims, characterized in that the secondary part (4) is rotatably mounted by means of a bearing (36) between the arc spring flange (10) and a guide element (37) connected to the primary part (3).
  7. Torsional vibration damper according to one of the preceding claims, characterized in that a disc spring sealing diaphragm (30, 35) is provided for the output-side sealing of the spring channel (7), which is supported on the inside of the cover element (8) of the primary part (3) and is guided in a pre-tensioned sealing manner via a friction ring (31) on the clutch basket (12).
  8. Torsional vibration damper according to one of the preceding claims, characterized in that a friction ring (32) is inserted in an annular gap (33) between the primary part (3) and the arc spring flange (10) for the drive-side sealing of the spring channel (7).

Description

The invention relates to a torsional vibration damper constructed as a dual-mass flywheel of a series hybrid drive train of a vehicle, which is inserted between an internal combustion engine and an electric motor and comprises a primary part connected to a crankshaft of the internal combustion engine and a multi-part secondary part coupled to an output shaft, which are elastically connected via arc springs inserted in a spring channel and connected to an arc spring flange, and the secondary part includes a disconnecting clutch. In P2 hybrid systems, an electric motor (coaxial or parallel to the engine) is installed between the internal combustion engine and the transmission. To allow the electric motor to be used independently of the internal combustion engine for purely electric driving, a disconnect clutch, also known as a KO clutch, is required. From the WO 2015 / 172 784 A2 A device is known that shows a torque transmission device for hybrid vehicles, which is associated with a powertrain comprising an internal combustion engine, an electric motor, and a transmission. Within the torque transmission device, which includes a disconnect clutch with a clutch actuator, an electric motor is arranged axially offset from a torsional vibration damper. In the printed publication WO 2010 / 028 620 A1 Another torque transmission device for hybrid applications is shown, which includes an internal combustion engine, an electric motor and a dual-mass flywheel, wherein the drives can be switched by means of a disconnect clutch. The DE 10 2017 130 421 A1 shows a coupling device for a hybrid module of a motor vehicle with a first lamellar package and with a second lamellar package, which can be selectively switched for torque transmission between a damper unit on the internal combustion engine side and a traction wheel on the electric motor side. As a further state of the art, reference is made to the DE 10 2009 059 944 A1 , the DE 10 2010 051 436 A1 and the DE 10 2019 109 981 A1 referred. The invention is based on the objective of presenting a structurally and functionally improved torsional vibration damper with an integrated, high-torque-transmitting disconnect coupling in a cost-effective series production design. The aforementioned problem is solved according to the invention by a torsional vibration damper including the features of claim 1. Preferred embodiments of the invention are specified in the dependent claims and the following description. According to the invention, the torsional vibration damper comprises a disconnecting clutch designed as a multi-disc clutch, which includes a clutch basket positioned radially below the spring channel and fixed in position on the arc spring flange of the secondary part, which can be coupled to a hub flange of the secondary part with an angled leg. The coupling basket, arranged radially below the arc springs or spring channel of the disconnect coupling, which is preferably designed as a conventional multi-plate coupling, is attached to the arc spring flange by force-fit, form-fit, and/or material-fit connection. Together with an angled leg of the hub flange of the secondary part, the coupling basket defines an annular installation space intended for the disconnect coupling. In known solutions, the torsional vibration damper is connected, for example, via a splined connection to a disconnect coupling, which is positioned separately from the installation space of the electric motor. Due to the clutch disc, the friction surface and consequently the transmittable torque are limited in these disconnect couplings, making them insufficient for many applications. In contrast, the concept according to the invention shows a secondary component in which a multi-disc clutch is integrated between the arc spring flange and the hub flange of the output hub. With the disconnect clutch or the multi-disc clutch, a higher torque from the internal combustion engine can advantageously be transmitted within the same installation space. According to a preferred design, a torque of 400 Nm can be transmitted using the disconnect clutch according to the invention. Due to the direct association of the multi-disc clutch with the secondary component, a space-optimized solution is advantageously achieved, particularly in the radial direction. The advantageously space-optimized, simply constructed torsional vibration damper according to the invention, with an integrated, high-torque-transmitting disconnect coupling, can be manufactured cost-effectively. This torsional vibration damper is preferably used for passenger car powertrains, especially for series, series-parallel, and power-split hybrid applications, with separation of the two drives: the internal combustion engine and the electric motor. romotor. Furthermore, the concept according to the invention is particularly suitable for the implementation of P2 hybridization of dual-clutch transmissions in smaller vehicles with a front-transverse drivetra