Hybrid module with intermediate wall with threaded hole area, as well as hybrid drive train

Abstract

A hybrid module (1) for a drive train of a motor vehicle, comprising a housing (2), a separating clutch (3), and an annular slave cylinder (4) designed to actuate the separating clutch (3), wherein the slave cylinder (4) is received with its annular cylinder housing (5) on a sleeve region (6) of the housing (2), wherein the cylinder housing (5) is arranged on the housing (2) in a rotationally fixed manner with respect to a rotation axis (8) by means of a positive connection (7), wherein the sleeve region (6) and / or the disk region (11) are / is formed by an intermediate wall (13) of the housing (2), characterized in that the cylinder housing (5) has a line connection (14) to which a line (15) is or can be connected, wherein the line connection (14) is arranged at least partially in an axial recess (16) of the intermediate wall (13).

Description

[0001] The invention relates to a hybrid module for a (hybrid) drive train of a motor vehicle, such as a car, truck, bus, or other commercial vehicle, comprising a housing, a separating clutch, and an annular slave cylinder designed to actuate the separating clutch. The slave cylinder, with its annular cylinder housing, is received on a sleeve region of the housing. Furthermore, the invention relates to a hybrid drive train for a motor vehicle with this hybrid module.

[0002] WO 2016 / 070 878 A1 discloses a hybrid module for a drive train of a motor vehicle, comprising an electric drive motor integrated into the hybrid module. Furthermore, DE 10 2010 054 545 A1 discloses a hybrid module that can be read as the preamble of claim 1.

[0003] However, with regard to the slave cylinders used in the prior art, it has proven disadvantageous that their housing mounts are relatively large. Furthermore, in some cases, the slave cylinders are relatively complex to mount on the housing, or the connection point is relatively complex to manufacture.

[0004] It is therefore the object of the present invention to eliminate the disadvantages known from the prior art and in particular to provide a hybrid module which is as easy to assemble and compact as possible.

[0005] This object is achieved according to the invention by a hybrid module according to claim 1. The cylinder housing is mounted on the housing in a rotationally fixed manner with respect to a rotation axis by means of a positive connection. Especially when centering a CSC, for example, without the use of screws, it is important to ensure a clear direction of force during operation, and appropriate precautions must be taken.

[0006] This makes the slave cylinder particularly easy to mount on the housing. The connection to the housing is also relatively inexpensive.

[0007] Further advantageous embodiments are claimed in the subclaims and explained in more detail below.

[0008] Accordingly, it is also advantageous if the form-locking connection has a hole and a nose inserted into the hole, which is preferably designed as a pin-shaped protrusion. This allows for a cost-effective implementation of the form-locking connection.

[0009] The manufacturing effort is further reduced if the hole, preferably in the form of a bore, particularly preferably a through-bore, is formed / arranged in a radially extending disc region of the housing.

[0010] It is also advantageous if the nose is formed on an axial side of the cylinder housing (facing the disc area / directly adjacent to the disc area).

[0011] If the nose is formed / molded as a single piece with the cylinder housing, the manufacturing effort is further reduced.

[0012] It is particularly advantageous if the cylinder housing is molded from a plastic. This allows for particularly cost-effective manufacturing and a lightweight construction. In this context, it is also advantageous if the housing / sleeve area is molded from a metal material, such as sheet metal.

[0013] According to the invention, the sleeve area and / or the disc area are formed by an intermediate wall of the housing. This further reduces the installation space requirement.

[0014] Further according to the invention, the cylinder housing has a line connection to which a line is or can be connected, wherein the line connection is arranged at least partially in an axial recess of the intermediate wall. This further compresses the hybrid module in the axial direction.

[0015] If at least one recess / interruption, preferably several recesses / interruptions, is made in the partition wall, through which the cable runs at least in sections, the cable is also accommodated in a space-saving manner.

[0016] The slave cylinder is preferably designed as a concentric slave cylinder (CSC).

[0017] In addition, it is expedient if several noses of the positive connection are arranged distributed in the circumferential direction on the cylinder housing, each of which is positively received in its own hole in the housing.

[0018] Furthermore, the invention relates to a hybrid drive train for a motor vehicle, comprising a hybrid module according to the invention according to at least one of the previously described embodiments.

[0019] In other words, a hybrid module is thus provided that is suitable for an axially parallel electric motor (electric machine). According to the invention, a slave cylinder (“concentric slave cylinder” (CSC) is mounted on a partition wall. Projections (noses) of a (plastic) housing (cylinder housing) of the CSC protrude into holes in the housing, forming a positive fit.

[0020] The invention will now be explained in more detail below with reference to figures, in which context different embodiments are also shown.

[0021] They show: Fig. 1 a longitudinal sectional view of a hybrid module according to the invention according to a first embodiment, wherein the sectional plane is positioned such that a positive connection implemented between a cylinder housing of a slave cylinder and a housing can be seen, Fig. 2 a longitudinal section of the Fig. 1 already illustrated hybrid module, where the cutting plane is opposite to that in Fig. 1 selected cutting plane is offset so that the position of a line connection attached to the cylinder housing can be seen, Fig. 3 a longitudinal section of the hybrid module, similar to Fig. 3, whereby the arrangement of the cable connection including the cable connected to it relative to the housing is clearly visible, Fig. 4 a longitudinal sectional view of a hybrid module according to the invention according to a second embodiment, wherein a cylinder housing of a slave cylinder is shown in section in the region of a line connection, Fig. 5 a longitudinal sectional view of a hybrid module according to the invention according to a third embodiment, wherein a cylinder housing of a slave cylinder is again shown in section in the region of a line connection, and Fig. 6 a perspective view of the longitudinally sectioned hybrid module according to Fig. 5.

[0022] The figures are merely schematic in nature and serve exclusively to facilitate understanding of the invention. The same elements are provided with the same reference numerals. Furthermore, the different features of the various embodiments can, in principle, be freely combined with one another. With regard to the different embodiments described in more detail below, it should be noted that the embodiments are all fundamentally constructed and function according to the first embodiment, so that for the sake of brevity, only the differences from the first embodiment are described.

[0023] In the Fig. 1 to 3, the first embodiment of a hybrid module 1 according to the invention is illustrated. The hybrid module 1 is, during operation, a component of a hybrid drive train of a motor vehicle. The hybrid module 1 is then preferably inserted, viewed along the torque transmission path, between an output shaft 22 of an internal combustion engine and a transmission. The hybrid module 1 typically has a clutch device consisting of several clutches, of which a (first) clutch in the form of a separating clutch 3 and a (second) clutch in the form of a starting clutch 23 are shown. The separating clutch 3 serves for the selective, rotationally fixed coupling of the output shaft 22 to an intermediate shaft 18 of the hybrid module 1. The hybrid module 1 also typically has an electric machine 31 / an electric motor. The electric machine 31 is coaxial in this embodiment, i.e.with a rotational axis of its rotor 32 arranged coaxially to the rotational axis 8. Alternatively, as in the second embodiment according to the . Fig. 4 to 6, the electric machine in further embodiments is also arranged in principle axially parallel, i.e., with a rotational axis of its rotor parallel to a rotational axis 8 of the intermediate shaft 18 / the output shaft 22 (crankshaft). In this second embodiment, as in the first embodiment, the electric machine is a component of the hybrid module 1, but can in principle also be considered a separate component from the hybrid module 1.

[0024] For example, in Fig. 1, the hybrid module 1 is connected to a damping device 24 / torsional vibration damping device on a side facing the output shaft 22. The damping device 24 is designed as a dual-mass flywheel, but according to further embodiments, it can also be designed in principle as a single-mass flywheel. During operation of the hybrid module 1, the damping device 24 is connected on the input side in a rotationally fixed manner to the output shaft 22 of the internal combustion engine. On the output side, the damping device 24 is connected in a rotationally fixed manner to a first rotary component 19 of the separating clutch 3. The damping device 24 is considered a component of the hybrid module 1, but can also be viewed as an element detached from the hybrid module 1, which is only connected to the hybrid module 1 during assembly of the hybrid module 1 in the drive train.

[0025] The separating clutch 3 is designed as a friction clutch. In particular, the separating clutch 3 is configured as a friction-disk clutch. In this exemplary embodiment, the separating clutch 3 is designed as a dry clutch, but in principle can also be designed as a wet clutch. The first rotating component 19 and a second rotating component 20 of the separating clutch 3, provided next to the first rotating component 19, interact with one another via a plurality of friction elements 21a and 21b. In an engaged position of the separating clutch 3, the two rotating components 19, 20 are typically frictionally connected to one another by their friction elements 21a, 21b. In a disengaged position of the separating clutch 3, the friction elements 21a and 21b, and thus the rotating components 19, 20, are arranged so as to be freely rotatable relative to one another. The two rotating components 19, 20 are arranged so as to be rotatable about the central axis of rotation 8.Due to the design of the separating clutch 3, the respective friction elements 21a or 21b are formed as friction-disk clutches in the form of friction disks.

[0026] The first rotating component 19 has, in addition to its first friction elements 21a, a (first) carrier 25. The first carrier 25 is designed as an outer carrier / outer disk carrier. The plurality of first friction elements 21a are non-rotatably mounted on the first carrier 25. The first friction elements 21a are also mounted on the first carrier 25 so as to be displaceable relative to one another in the axial direction.

[0027] A second friction element 21b of the second rotating component 20 is arranged between each two adjacent first friction elements 21a. The second rotating component 20 has a second carrier 26 in the form of an inner carrier / inner disk carrier, which accommodates the second friction elements 21b in a rotationally fixed manner and so that they can be axially displaced relative to one another. The rotor 32 of the electric machine 31 is also rotationally fixedly connected to the second rotating component 20 of the separating clutch 3. For this purpose, the rotor 32 is mounted on a radial outer side of a receiving area 27 of the second carrier 26. The receiving area 27 is arranged radially outside the friction elements 21a, 21b.

[0028] The second rotating component 20 is connected, via its second carrier 26, in a rotationally fixed manner to the intermediate shaft 18, which in turn is mounted for rotation about the rotation axis 8. The intermediate shaft 18 is mounted / radially and axially supported relative to a housing 2 of the hybrid module 1 via two support bearings 29a, 29b. The two support bearings 29a, 29b are received on an intermediate wall 13 of the housing 2. For this purpose, the intermediate wall 13 has a sleeve region 6 adjoining a disk region 11 radially on the inside, on which sleeve region 6 the two support bearings 29a, 29b are arranged (radially from the inside) that support the intermediate shaft 18 relative to the intermediate wall 13. The intermediate wall 13 itself is an integral part of the housing 2 (e.g., designed as a clutch housing) and is connected to a base section 39 of the housing 2 via a screw connection. The partition wall 13 consists of a (preferably drawn) steel.Alternatively, it is also possible in principle to design the intermediate wall 13 as a one-piece component of the housing 2 / the base section 39, wherein the housing 2 is then preferably formed from an aluminum cast (with intermediate housing).

[0029] In this exemplary embodiment, a spline 30 serves to connect the second carrier 26 to the intermediate shaft 18 in a rotationally fixed manner. During operation, the intermediate shaft 18 serves to connect the second rotating component 20 to the further second clutch 23 / a corresponding rotating component of the second clutch 23.

[0030] A slave cylinder 4 is mounted / arranged on a radial outer side of the sleeve area 6. As shown in Fig. 1, the separating clutch 3 is actuated by means of an actuation system 28 comprising the slave cylinder 4. The slave cylinder 4 is designed as a concentric (annular) slave cylinder 4 (CSC). Accordingly, the slave cylinder 4 has an annular cylinder housing 5, in which cylinder housing 5 an annular piston 33 is slidably guided. The annular piston 33 forms a fluidic, here hydraulic, pressure chamber 34 with the cylinder housing 5. As shown in the Fig. 2 and Fig. 3, during operation, a fluidic (hydraulic) line 15 is connected to a line connection 14 connected to the pressure chamber 34. Thus, the pressure chamber 34 is connected to a master cylinder of the actuation system 28 via a fluid path that is partially formed by the line 15.

[0031] Since the separating clutch 3 is designed as a normally closed / normally engaged clutch, the slave cylinder 4 is implemented as a releaser.

[0032] The slave cylinder 4, in particular with its cylinder housing 5, is pushed onto the sleeve area 6 and radially fixed / supported thereon. The slave cylinder 4 is thus fixed to the housing, namely by the housing-fixed intermediate wall 13. The cylinder housing 5 is formed from a plastic, whereas the sleeve area 6, as well as the entire intermediate wall 13, is formed from a metal / steel. The cylinder housing 5 is fixed to the sleeve area 6. Furthermore, the cylinder housing 5, with its axial side 12 facing the disc area 11, is in contact with the intermediate wall 13 and is thus supported on the intermediate wall 13.

[0033] According to the invention, as in Fig. 1, the cylinder housing 5 is also arranged / supported / held on the housing 2, namely the intermediate wall 13, in a rotationally fixed manner by means of a positive connection 7 with respect to the rotation axis 8. For this purpose, a plurality of lugs 10 distributed along the circumference are formed on the axial side 12 of the cylinder housing 5, wherein each lug 10 is received in a form-fitting manner in a corresponding hole 9 in the disc region 11. Each lug 10 is an integral component of the cylinder housing 5 and is thus also formed from plastic. Each lug 10 is designed as a pin-shaped extension / projection / pin-shaped elevation. The respective hole 9 is designed as a through-hole, preferably in the form of a bore. Alternatively, it is in principle also possible to provide only one lug 10 and one hole 9. It is also possible to provide the at least one lug 10 alternatively on the disc region 11 and the hole 9 on the cylinder housing 5.

[0034] The respective nose 10 is received in its associated hole 9 such that the cylinder housing 5 is supported in a rotationally secure manner, axially fixed, and centered relative to the rotation axis 8. After complete assembly of the hybrid module 1, i.e., during operation of the hybrid module 1, the cylinder housing 5 is also preloaded in the direction of the disc area 11 due to the preload of the annular piston 33 relative to an actuating bearing 37 that displaces a pressure pot 36 of the separating clutch 3. The pressure pot 36 is pressed axially against the actuating bearing 37 by means of a disc spring 38.

[0035] In the Fig. 2 and Fig. 3 it can also be seen that the intermediate wall 13 / the disc region 11 is designed such that the line connection 14 and the line 15 connected to it, which runs outwards in the radial direction from the line connection 14, are arranged in an axial direction overlapping / nested with the intermediate wall 13. In the circumferential region of the line connection 14, the disc region 11 has an axial recess 16 in the form of a cutout / opening into which the line connection 14 projects axially. Radially outside the recess 16 are a plurality of recesses 17, which in turn accommodate the line 15. The line 15 is thus guided outwards in the radial direction along these recesses 17.

[0036] Combined with Fig. Figure 4 illustrates the second embodiment. The rotor of the electric machine (not shown here for the sake of clarity) is drivingly coupled to the second rotating component 20 of the separating clutch 3 via a traction mechanism 35. For this purpose, the rotor is coupled to a receiving contour on the receiving area 27 via the traction mechanism 35 (here a belt, alternatively a chain, etc.) on the side of its rotor shaft, which is arranged axially parallel to the rotational axis 8.

[0037] In addition, the cylinder housing 5 now has a line connection 14 running perpendicular to the rotation axis 8 and not, as in the first embodiment, at an angle of less than 90° relative to the rotation axis 8. The positive connection 7 is not shown further for the sake of clarity.

[0038] The third embodiment of the Fig. 5 and Fig. 6 is essentially constructed and functions according to the second embodiment. Only the arrangement of the line 15 and the design of the cylinder housing 5 differ slightly from those of the Fig. 4.

[0039] In other words, the CSC 4 is mounted on the partition wall 13. Lugs 10 of the plastic housing (cylinder housing 5) protrude into bores (holes 9) of the partition wall 13 in a form-fitting manner. The plastic studs (lugs 10) serve to center and secure the CSC 4 until final assembly, and to prevent it from rotating. For space reasons, the hydraulic supply line (line 15) is mounted in recesses 17 of the partition wall 13. The line connection 14 (connector / connection piece) of the CSC 4 is also located in a local opening (recess 16) in the wall (partition wall 13).

[0040] Reference numeral 25 denotes a preferably one-piece outer disk carrier. Reference numeral 40 denotes a retaining ring for supporting a bearing 41 of the outer disk carrier 25 and a disc spring support plate 42. Reference numeral 43 denotes a flywheel which, according to a first embodiment, is formed in one piece with a flange and toothing for connection to a shaft (intermediate shaft 18). Reference numeral 38 denotes a disc spring having a diameter smaller than the inner diameter of a driving toothing in order to gain axial installation space. Reference numeral 18 denotes a shaft which can be designed as a hollow shaft or a solid shaft. Reference numeral 13 denotes an intermediate wall having through-holes 44 with a thread for screwing to a housing 2. List of reference symbols 1 hybrid module 2 housings 3 Separating clutch 4 slave cylinders 5 cylinder housings 6 Sleeve area 7 Form-fitting connection 8 axis of rotation 9 holes 10 Nose 11 Disc area 12 pages 13 Partition wall 14 Line connection 15 Line 16 Deepening 17 Recess 18 Intermediate shaft 19 first rotating component 20 second rotating component 21a first friction element 21b second friction element 22 Output shaft 23 Starting clutch 24 Damping device 25 first carrier 26 second carrier 27 Recording area 28 Actuation system 29a first support bearing 29b second support bearing 30 splines 31 electric machine 32 rotors 33 ring pistons 34 Printing room 35 traction devices 36 pressure cooker 37 operating bearings 38 disc spring 39 Base section 40 retaining ring 41 warehouses 42 support plate 43 Flywheel 44 Transfer

Claims

[1] Hybrid module (1) for a powertrain of a motor vehicle, comprising a housing (2), a disconnect clutch (3) and an annular slave cylinder (4) designed for actuating the disconnect clutch (3), wherein the slave cylinder (4) with its annular cylinder housing (5) is received on a sleeve area (6) of the housing (2), wherein the cylinder housing (5) is arranged on the housing (2) in a rotationally fixed manner by means of a positive locking connection (7) with respect to an axis of rotation (8), wherein the sleeve area (6) and / or the disc area (11) are formed by an intermediate wall (13) of the housing (2), characterized by , that the cylinder housing (5) has a line connection (14) to which a line (15) is connected or can be connected, wherein the line connection (14) is arranged at least partially in an axial recess (16) of the intermediate wall (13). [2] Hybrid module (1) according to claim 1, characterized by, that the positive locking connection (7) has a hole (9) and a nose (10) inserted into the hole (9), which is preferably designed as a pin-shaped protrusion. [3] Hybrid module (1) according to claim 2, characterized by , that the hole (9) is formed in a radially extending disk area (11) of the housing (2). [4] Hybrid module (1) according to claim 2 or 3, characterized by , that the nose (10) is formed on an axial side (12) of the cylinder housing (5). [5] Hybrid module (1) according to claim 4, characterized by , that the nose (10) is formed as a single piece with the cylinder housing (5). [6] Hybrid module (1) according to any one of claims 1 to 5, characterized by , that the cylinder housing (5) is made of a plastic. [7] Hybrid module (1) according to any one of claims 1 to 6, characterized by, that at least one recess (17) is provided in the partition wall (13) in which the conduit (15) runs at least section by section. [8] Hybrid powertrain for a motor vehicle, comprising a hybrid module (1) according to at least one of claims 1 to 7.

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