Hybrid module with partition wall with threaded hole area; and hybrid drivetrain

Abstract

Hybrid module (1) for a powertrain of a motor vehicle, comprising a disconnecting clutch (2), an intermediate shaft (4) non-rotatably connected to a rotating component (3) of the disconnecting clutch (2), and a housing (5), wherein the housing (5) has a partition wall (6) radially supporting the intermediate shaft (4) and a base section (7) receiving the partition wall (6), wherein the partition wall (6) has a threaded hole area (8) and a screw (9) is screwed into the threaded hole area (8), connecting the partition wall (6) to the base section (7), characterized in that the threaded hole area (8) is formed by a threaded sleeve fixedly attached in a receiving hole of the partition wall (6).

Description

[0001] The invention relates to a hybrid module for a (hybrid) powertrain of a motor vehicle, such as a passenger car, truck, bus, or other commercial vehicle, comprising a disconnect clutch, an intermediate shaft non-rotatably connected to a rotating component of the disconnect clutch, and a housing, wherein the housing has a partition wall radially supporting the intermediate shaft (preferably indirectly or directly) and a base section receiving the partition wall. The invention further relates to a hybrid powertrain for a motor vehicle with this hybrid module.

[0002] WO 2016 / 070 878 A1 discloses a hybrid module for a motor vehicle powertrain, comprising an electric drive motor integrated into the hybrid module. Furthermore, DE 10 2014 206 330 A1 discloses a hybrid module that can be read as referring to the preamble of claim 1.

[0003] However, with regard to the housings used so far in the prior art designs, which are designed in multiple parts for easy assembly, it has proven to be a disadvantage that the connection points between the individual housing parts are often designed to be relatively large in order to enable the required fastening forces.

[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 that is as easy to assemble and as compact as possible.

[0005] This is solved according to the invention by the fact that the partition wall has a threaded hole area and a screw is screwed into the threaded hole area, connecting the partition wall to the base section.

[0006] This provides a direct mounting area for the screw within the partition wall. Consequently, the screw length can be significantly reduced, saving installation space.

[0007] Since the threaded hole area is formed by a threaded sleeve that is firmly attached / inserted in a receiving hole of the partition wall, the threaded hole area can be adapted particularly individually to a desired hardness value.

[0008] Further advantageous embodiments are claimed in the dependent claims and are explained in more detail below.

[0009] Therefore, it is also advantageous if the intermediate wall, and especially the threaded hole area, is made of a steel material. This allows the length of the thread provided by the threaded hole area, and consequently also of the screw, to be further reduced.

[0010] If the threaded hole area is formed by a (preferably cup-shaped) opening in the partition wall, the threaded hole area can be produced particularly cost-effectively.

[0011] In this context, it is particularly advantageous if the opening is manufactured using cold forming (or alternatively, casting). Accordingly, the opening is preferably formed by means of a stamping and / or deep-drawing process (or by means of a casting process). This further simplifies the manufacturing process.

[0012] It is also advantageous if the screw, with its threaded section, protrudes through a through-hole in the base section and its screw head rests against an axial side of the base section facing away from the partition wall. This results in a particularly simple screw connection and greatly simplifies the manufacturing effort.

[0013] If the intermediate wall has a sleeve area on which at least one support bearing that supports the intermediate shaft relative to the intermediate wall is arranged / received / held, the bearing of the intermediate shaft is also implemented in a particularly space-saving manner.

[0014] Furthermore, it is advantageous if several threaded hole areas are distributed along one circumference (i.e., viewed in one circumferential direction of the disconnect coupling) on ​​the intermediate wall. This ensures a fastening that is as uniform as possible in the circumferential direction.

[0015] If at least one threaded hole area is arranged radially outside several friction elements of the disconnect coupling with respect to an axis of rotation of the disconnect coupling, the hybrid module is designed to be even more compact, especially in the axial direction.

[0016] If the partition also serves to accommodate / support (at least part of) an actuation system for the disconnect coupling, the actuation system is arranged in a particularly space-saving manner. Preferably, the partition also serves to accommodate a slave cylinder (CSC) of this actuation system.

[0017] Furthermore, the invention relates to a hybrid powertrain for a motor vehicle, with a hybrid module according to the invention according to at least one of the embodiments described above.

[0018] In other words, according to the invention, a hybrid module with an intermediate wall featuring threaded openings (threaded hole areas) is realized. The hybrid module is particularly intended for an axially parallel electric motor. Thus, an intermediate wall, which accommodates a disconnect coupling and, more preferably, the corresponding actuation system of this disconnect coupling, has threaded holes (threaded hole areas).

[0019] The invention will now be explained in more detail below using figures.

[0020] They show: Fig. 1 a perspective view of a hybrid module according to the invention, cut in longitudinal direction, according to a preferred embodiment, wherein in particular a connection point between a base section and an intermediate wall of a housing of the hybrid module is visible, Fig. 2 a perspective representation of the in Fig. 1 inserted longitudinally cut partition wall, wherein the cutting plane is chosen so that a threaded hole area of ​​the partition wall is visible in the section, Fig. 3 a perspective representation of a circumference of the in Fig. 1 inserted partition wall in full view, showing a side facing away from the base section in the assembled state, towards which the threaded hole areas are projected, Fig. 4 a longitudinal section view of the hybrid module according to Fig. 1, where a dual-mass flywheel and an additional clutch are now shown, and Fig. 5 a perspective view of the longitudinally cut hybrid module according to Fig. 4.

[0021] The figures are purely schematic and serve solely to illustrate the invention. The same elements are identified by the same reference symbols.

[0022] In the Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. Figure 5 illustrates a preferred embodiment of a hybrid module 1 according to the invention. The hybrid module 1 is part of a hybrid powertrain of a motor vehicle during operation. Preferably, the hybrid module 1 is installed between an output shaft of an internal combustion engine and a transmission, viewed along the torque transmission path. The hybrid module 1 typically has a clutch assembly consisting of several clutches, of which a (first) clutch is in the form of a disconnect clutch 2 and a (second) clutch is in the form of a starting clutch 23. Fig. 4 and Fig. 5) The disconnect coupling 2 serves to selectively couple the output shaft to an intermediate shaft 4 of the hybrid module 1 in a rotationally fixed manner. The hybrid module 1 also typically includes an electric machine / motor, which is not shown for clarity. In this embodiment, the electric machine is arranged axially parallel, i.e., with the axis of rotation of its rotor parallel to the axis of rotation 15 of the intermediate shaft 4 / output shaft (crankshaft). In this embodiment, the electric machine is part of the hybrid module 1, but in principle, it can also be considered a separate component. In other embodiments, the electric machine is also arranged coaxially, i.e., with the axis of rotation of its rotor coaxial to the axis of rotation 15.

[0023] As in the Fig. 4 and Fig. As can be seen in Figure 5, the hybrid module 1 is connected to a damping device 24 / torsional vibration damping device on one side facing the output shaft. The damping device 24 is designed as a simplified representation of a dual-mass flywheel, but according to further descriptions, it can also be designed as a single-mass flywheel. On the input side, the damping device 24 is rotationally fixed to the output shaft of the internal combustion engine during operation of the hybrid module 1. On the output side, the damping device 24 is rotationally fixed to a first rotating component 25 of the disconnect clutch 2. The damping device 24 is considered a component of the hybrid module 1, but can also be considered a separate element that is only connected to the hybrid module 1 during its assembly in the drivetrain.

[0024] The disconnect clutch 2 is designed as a friction clutch. In particular, the disconnect clutch 2 is designed as a friction plate clutch. In this embodiment, the disconnect clutch 2 is designed as a dry clutch, but in principle it can also be designed as a wet clutch. The first rotating component 25 and a second rotating component 3 of the disconnect clutch 2, located next to the first rotating component 25, interact with each other via several friction elements 16a and 16b. In an engaged position of the disconnect clutch 2, the two rotating components 3, 25 are frictionally connected to each other by means of their friction elements 16a, 16b in a typical manner. In a disengaged position of the disconnect clutch 2, the friction elements 16a and 16b, and thus the rotating components 3, 25, are arranged to rotate freely relative to each other. The two rotating components 3, 25 are arranged to rotate about the central axis of rotation 15.The respective friction elements 16a or 16b are designed as friction plates due to the design of the disconnect coupling 2 as a friction plate coupling.

[0025] The first rotating component 25 has, in addition to its first friction elements 16a, a one-piece (first) support 26. The first support 26 is designed as an outer support / outer lamella support. The several first friction elements 16a are mounted on the first support 26 in a rotationally fixed manner. The first friction elements 16a are also mounted on the first support 26 so that they are axially displaceable relative to each other.

[0026] A second friction element 16b of the second rotating component 3 is arranged between each pair of adjacent first friction elements 16a. The second rotating component 3 has a second support 27 in the form of an inner support / inner lamellar support, which holds the second friction elements 16b in a rotationally fixed manner and allows them to be axially displaceable relative to each other. The rotor of the electric machine, which is not shown further here for the sake of clarity, is also drivenly coupled to the second rotating component 3 of the disconnect coupling 2. For this purpose, the rotor is coupled to the second rotating component 3 via a traction element 28 (here a belt, alternatively also a chain, etc.) at its rotor shaft. Fig. 4 and Fig. 5) The second support 27 has a tensile element receiving area 29, which receives the tensile element 28 in a force-fit manner. The receiving area 29 is arranged radially outside the friction elements 16a, 16b. The second support 27 thus forms a rotor / pulley support.

[0027] As in Fig. As can be seen in Figure 1, the disconnect clutch 2 can be actuated by means of an actuating system 22 comprising a slave cylinder 30. The slave cylinder 30 is designed as a concentric (ring-shaped) slave cylinder 30 (CSC). The slave cylinder 30 is fixed to the housing, namely by means of a housing-fixed intermediate wall 6, as described in more detail below. The disconnect clutch 2 is designed as a normally closed / normally engaged clutch. The slave cylinder 30 is therefore implemented as a release mechanism / release system.

[0028] The second rotating component 3 is, by means of its second support 27, non-rotatably connected to the intermediate shaft 4, which in turn is rotatably mounted about the axis of rotation 15. The intermediate shaft 4 is supported radially and axially relative to a housing 5 of the hybrid module 1 by means of two support bearings 14a, 14b, the housing 5 being largely in Fig. As can be clearly seen in Figure 1, the two support bearings 14a, 14b are mounted on the intermediate wall 6 of the housing 5. For this purpose, the intermediate wall 6 has a sleeve section 13 radially adjoining a disk area 17 on its inner side. The two support bearings 14a, 14b, which support the intermediate shaft 4 relative to the intermediate wall 6, are arranged on this sleeve section 13 (radially from the inside). The slave cylinder 30 is mounted on / arranged on a radial outer side of the sleeve section 13.

[0029] In this embodiment, a riveted connection 33 serves to provide a rotationally fixed connection between the second support 27 and the intermediate shaft 4. During operation, the intermediate shaft 4 serves to connect the second rotating component 3 to the further second coupling 23 / a corresponding rotating component of the second coupling 23.

[0030] Combined with Fig. Figure 1 further illustrates the inventive design of the housing 5 of the hybrid module 1. Besides the intermediate wall 6, the housing 5 has a base section 7, which is shown here as essentially cup-shaped. The base section 7 is firmly connected to the intermediate wall 6. The base section 7 is connected to the intermediate wall 6 by means of several screw connections. To implement these screw connections, several threaded hole areas 8 distributed circumferentially around the axis of rotation 15 are provided in the intermediate wall 6, with screws 9 being screwed into the threaded hole areas 8. An example of these screw connections is shown in section in Figure 1. Fig. Figure 1 shows one of these screw connections in detail. The threaded hole areas 8 are arranged radially outside the friction elements 16a, 16b with respect to the axis of rotation 15 of the disconnect coupling 2.

[0031] The respective threaded hole area 8 is located in a radially outer region of the partition wall 6, namely in a radially extending disk area 17 of the partition wall 6. The threaded hole area 8 is formed by a through hole penetrating the partition wall 6 and provided with an internal thread. The corresponding screw 9 is screwed into the threaded hole area 8 with its external thread area 11.

[0032] The base section 7 forms a flange area 18 that rests flat against the disk area 17 in the axial direction (along the axis of rotation 15). Furthermore, a shoulder 19 is formed on the base section 7, which serves as a radial contact surface for the partition wall 6. This secures the partition wall 6 relative to the base section 7 in both the axial and radial directions.

[0033] The flange area 18 is provided with several circumferentially distributed through holes 20, each through hole 20 corresponding to a threaded hole area 8 and aligned axially with this threaded hole area 8. The screw 9 extends axially through the respective through hole 20 of the flange area 18. On one axial side of the flange area 18 facing away from the intermediate wall 6, namely the washer area 17, the screw 9 rests firmly against the flange area 18 with its screw head 12. For this purpose, an annular contact surface 21 / bearing surface is formed around the through hole 20, which is preferably machined.

[0034] In connection with the Fig. 2 and Fig. Figure 3 clearly shows the basic form of the threaded hole area 8. Each threaded hole area 8 is implemented as a cold-formed opening 10. The intermediate wall 6 is made of sheet steel. The intermediate wall 6 is thus formed in the area of ​​the respective opening 10 to create the threaded hole area 8. In particular, the threaded hole areas 8 are produced by deep drawing and / or stamping. The internal thread of the threaded hole area 8 is also produced by conventional machining or pressed in. Thus, the intermediate wall 6 forms a cup-shaped opening 10 that directly forms the threaded hole area 8 on its inner circumference. The threaded hole areas 8 / openings 10 have a greater material thickness, i.e.,a higher axial extent, on a section of the disk area 17 provided (in circumferential direction) between the threaded hole areas 8 / outside the threaded hole areas 8.

[0035] In this context, it should be noted that it is also possible to form the threaded hole areas 8 in other ways. For example, the threaded hole areas 8 can also be formed by raised areas / thickenings created using primary forming techniques, such as casting, into which the internal thread is then introduced. Alternatively, according to another embodiment, the threaded hole areas 8 can each be formed by means of separate sleeves, with each sleeve being firmly inserted into the corresponding through-hole (receiving hole) in the intermediate wall 6. The sleeve then forms the internal thread into which the screw 9 is screwed.

[0036] In the Fig. 4 and Fig.5 the threaded hole areas 8 implemented by the through-holes 10 are also recognizable in the installed state, whereby the representation of the base section 7 has been omitted for the sake of clarity.

[0037] In other words, the intermediate wall 6, which carries the K0 coupling (disconnecting coupling 2) including the actuator (slave cylinder 30) for the hybrid system 1, is provided with threaded through-holes (threaded hole areas 8 / through-holes 10) at the connection points to the housing 5. This eliminates the need for additional components such as nuts, and the hybrid module 1 can also be screwed into the hybrid module housing 5 from the transmission side. Alternatively, threaded sleeves can be inserted into the hybrid module housing 5. However, this entails additional assembly effort and, due to the larger number of individual parts, also higher costs.

[0038] Reference numeral 26 designates a one-piece outer lamella carrier. Reference numeral 31 designates a retaining ring for supporting a bearing 32 of the outer lamella carrier 26 and a disc spring support plate 34. Reference numeral 35 designates a flywheel which, according to a first embodiment, is formed one-piece with a flange and a toothed section for connection to a shaft (intermediate shaft 4). Reference numeral 36 designates a disc spring having a diameter smaller than the inner diameter of a drive tooth. Reference numeral 4 designates a shaft which may be a hollow shaft or a solid shaft. Reference numeral 6 designates an intermediate wall having through-holes 10 with threads for screwing onto a housing 5. Reference symbol list 1 hybrid module 2 Disconnect coupling 3 second rotating component of the disconnect coupling 4 Intermediate shaft 5 cases 6 Partition wall 7 Basic Section 8 threaded hole area 9 screw 10. Transfer 11 External thread area 12 screw heads 13 Sleeve area 14a first support bearing 14b second support bearing 15 axis of rotation 16a first friction element 16b second friction element 17 disc area 18 Flange area 19 Shoulder 20 through holes 21 Contact surface 22 Actuation system 23 Starting clutch 24 Damping device 25 first rotating component of the disconnect coupling 26 first carrier 27 second carrier 28 traction elements 29 Traction area 30 slave cylinders 31 retaining ring 32 storage areas 33 Rivet connection 34 Support plate 35 Flywheel 36 Belleville washers

Claims

[1] Hybrid module (1) for a powertrain of a motor vehicle, comprising a disconnect coupling (2), an intermediate shaft (4) non-rotatably connected to a rotating component (3) of the disconnect coupling (2), and a housing (5), wherein the housing (5) has a partition wall (6) radially supporting the intermediate shaft (4) and a base section (7) receiving the partition wall (6), wherein the partition wall (6) has a threaded hole area (8) and a screw (9) is screwed into the threaded hole area (8), connecting the partition wall (6) to the base section (7), characterized by , that the threaded hole area (8) is formed by a threaded sleeve firmly attached in a receiving hole of the partition wall (6). [2] Hybrid module (1) according to claim 1, characterized by, that the screw (9) with its threaded area (11) passes through a through hole (20) in the base section (7) and with its screw head (12) rests against an axial side of the base section (7) facing away from the partition wall (6). [3] Hybrid module (1) according to claim 1 or 2, characterized by , that the intermediate wall (6) has a sleeve area (13) on which at least one support bearing (14a, 14b) supporting the intermediate shaft (4) relative to the intermediate wall (6) is arranged. [4] Hybrid module (1) according to any one of claims 1 to 3, characterized by , that several threaded hole areas (8) are formed distributed along a circumference on the partition wall (6). [5] Hybrid module (1) according to claim 4, characterized by , that at least one threaded hole area (8) is arranged radially outside several friction elements (16a, 16b) of the disconnecting coupling (2) with respect to an axis of rotation (15) of the disconnecting coupling (2). [6] Hybrid powertrain for a motor vehicle, comprising a hybrid module (1) according to at least one of claims 1 to 5.

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