Method for producing a fastening arrangement, fastening arrangement, motor vehicle assembly having the fastening arrangement, and motor vehicle

Abstract

The invention relates to a method for producing a fastening arrangement (1), in which fastening partners (2, 3) or a hub body (4) and a shaft body (5) are connected to one another for conjoint rotation, wherein - one of the fastening partners (2, 3) is produced with a straight-circular-cylindrical first connection length section (6), - the other of the fastening partners (2, 3) is produced with a second connection length section (7) which deviates from a straight circular cylinder, - the connection length sections (6, 7) are designed in such a way that, at least in a radial oversize region (10), they overlap one another by a degree of radial overlap (11) along an arrangement longitudinal centre axis (9) of the fastening arrangement (1), - the shaft body (5) is inserted into the hub body (4) along the arrangement longitudinal axis (9), - when this connection movement is made, a connection device (12) connecting the fastening partners (2, 3) for conjoint rotation is formed in that material of the first connection length section (6) is displaced by means of the oversize region (10). The invention further relates to the fastening arrangement (1), a motor vehicle assembly which has the fastening arrangement (1), and a motor vehicle which has the motor vehicle assembly.

Description

[0001] Method for manufacturing a fastening arrangement, fastening arrangement and motor vehicle assembly comprising the fastening arrangement and motor vehicle

[0002] The present invention relates to a method for manufacturing a fastening arrangement in which a fastening partner designed as a hub body and a fastening partner designed as a shaft body are rotationally fixed to one another. The invention further relates to the fastening arrangement manufactured by the method. It also relates to a motor vehicle assembly comprising the fastening arrangement and to a motor vehicle equipped with the motor vehicle assembly.

[0003] In automotive and transmission manufacturing, press fits are established for shaft-hub connections. If these cannot withstand the required torsional moments and axial loads, splined connections or welded joints are used additionally or exclusively. Welded joints have the disadvantage of increased axial clearance, resulting from the requirement for weld seam inspection. Furthermore, a sufficiently robust and stable design is not feasible for all material pairings relevant to automotive and transmission manufacturing. Splined connections exhibit undesirable micro-movements in the backlash. They are also particularly complex to manufacture in terms of the toothing in the hub and shaft. Additionally, splined connections require axial locking to transmit axial forces.

[0004] From the state of the art - for example from DE 37 32 223 A1, DE 41 34 552 A1, EP 0661 474 A1 and FR 2 493 196 A1 - conventional shaft-hub connections

[0005] 24-0862 ABZ EXA 07.08.2024, which are designed as knurled press fits. However, due to space constraints, safety requirements, and process reliability regulations, these have limited application possibilities. Currently, knurled fits are primarily used in gearboxes, for example, in parking lock wheels, which bear a purely static load, due to the limitations explained above.

[0006] The object of the present invention is to create a particularly reliable, easy-to-manufacture and particularly versatile shaft-hub connection.

[0007] This problem is solved by the subject matter of the independent claims. Further possible embodiments of the invention are disclosed in the dependent claims, the description, and the figures. Features, advantages, and possible embodiments set forth in the description for one of the subject matter of the independent claims are to be regarded, at least analogously, across categories and embodiments as features, advantages, and possible embodiments of the respective subject matter of the other independent claims, as well as of any possible combination of the subject matter of the independent claims, optionally in conjunction with one or more of the dependent claims.

[0008] According to the invention, a method for manufacturing a fastening arrangement is proposed, wherein a fastening partner designed as a hub body and a fastening partner designed as a shaft body are connected to each other in a rotationally fixed manner. In other words, the two fastening partners are connected to each other in a rotationally fixed manner in the method for manufacturing the fastening arrangement. The fastening arrangement, which is characterized, among other things, by its manufacturing method, constitutes a further object of the present invention. Furthermore, according to the invention, a motor vehicle assembly is proposed that includes the fastening arrangement or two or more such fastening arrangements. The motor vehicle assembly is, in particular, a motor vehicle transmission.In other words, the fastening arrangement, when installed in its intended position, forms part of the vehicle assembly. Furthermore, the invention proposes a vehicle that includes the vehicle assembly and, consequently, the fastening arrangement. The vehicle is specifically designed as a purely electric or hybrid-electric vehicle.

[0009] 24-0862 ABZ EXA 07.08.2024 In the method for manufacturing the fastening assembly, the first fastening partner is manufactured with a straight-circular cylindrical first connecting length segment, and the other fastening partner is manufactured with a second connecting length segment that deviates from a straight circular cylinder. Furthermore, the fastening partners are arranged along a longitudinal center axis of the fastening assembly. This means that the fastening partners are arranged such that a longitudinal center axis of the hub body and a longitudinal center axis of the shaft body each coincide with the longitudinal center axis of the assembly. During the manufacturing of the fastening partners, the respective connecting length segment is designed such that the connecting length segments overlap each other by a radial overlap dimension along the longitudinal center axis of the assembly, at least in a radial interference range.The fastening components are then moved translationally towards each other along the longitudinal center axis of the assembly in a connecting movement, thereby inserting the shaft body into the hub body. During this connecting movement, a rotationally fixed connection is formed by displacing material from the straight-circle cylindrical or first connecting length segment using the interference section. This results in the first connecting length segment being shaped, with the interference section acting as the shaping or defining element. The second connecting length segment then engages with the first connecting length segment as the connecting movement is executed. This creates a particularly stable and reliable force-fit and form-fit, and consequently rotationally fixed, connection between the shaft and the hub body.

[0010] The connecting device is specifically configured to absorb dynamically changing tangential forces acting tangentially on the hub body. Therefore, it is suitable, for example, to integrate the mounting assembly as part of a torque transmission path into a vehicle's powertrain, particularly between the vehicle's traction motor and a wheel (tire-rim combination). In other words, the mounting assembly, or rather the shaft and hub bodies, are not limited to static applications or uses such as parking locks or the like.

[0011] In a further possible embodiment, the second connection length section is created by using a multi-drive coupling that is materially bonded to the fastening partner.

[0012] 24-0862 ABZ EXA 07.08.2024 A structure is formed on a circumferential surface of the fastening partner. It is specifically provided that the drive elements of the multiple drive structure are equidistant from one another along a circumferential direction of the respective fastening partner. According to a possible further development, the multiple drive structure is designed as knurling. In this context, knurling includes, among other things, a wedge or tooth structure whose wedges or teeth are arranged parallel and / or obliquely to the longitudinal center axis of the respective fastening partner. The multiple drive structure makes the connection device, by means of which the shaft body and the hub body are rotationally fixed, particularly stable. Furthermore, the fastening arrangement can advantageously transmit a particularly high torque due to the multiple drive structure.

[0013] In a further possible embodiment, a first embodiment of the fastening arrangement is formed by means of the method in which the straight, circular cylindrical, first connecting length section is designed as a hollow cylindrical hub of the hub body. This means that one cross-sectional shape of the hub is a circle. Accordingly, the second connecting length section, in particular the multiple drive element or knurling, is formed on an outer circumferential surface of the shaft body. In an alternative embodiment of the method, a second embodiment of the fastening arrangement is formed by means of the method in which the second connecting length section, which deviates from the straight circular cylinder, is designed as a non-circular hub of the hub body. In this case, the cross-sectional shape of the hub has at least one cross-sectional component that deviates from a circle.In the second design variant, the straight-circle cylindrical or first connection length section is accordingly formed by a cylindrical portion of the shaft body.

[0014] In another possible embodiment of the method, the material of the first connecting length section is displaced by machining during the manufacture of the joining device. Thus, during the execution of the joining movement, the material of the first connecting length section is cut into by means of the interference area, thereby removing chips from the first connecting length section. Alternatively or additionally, for example before and / or after the machining cut into the first connecting length section, or completely replacing the machining cut into the first connecting length section, it is provided that under

[0015] 24-0862 ABZ EXA 07.08.2024 During the execution of the joining movement, the material of the first joining length section is displaced without producing chips. In this case, the second length section is formed without chips being lifted from the first joining length section through the interference area. The chipless production of the joining device has the advantage that the notch effect of the fastening arrangement is particularly low.

[0016] In another possible embodiment, a first and a second centering cylinder are formed on each of the fastening partners. In other words, a first centering hollow cylinder is formed on the hub body, while a corresponding first centering cylinder is formed on the shaft body. Similarly, a second centering hollow cylinder is formed on the hub body, while a corresponding second centering cylinder is formed on the shaft body. The centering cylinders are designed such that the two first centering diameters of the first centering cylinder and the two second centering diameters of the second centering cylinder correspond to each other for centering purposes.For example, the first centering diameters have a common nominal dimension, while the second centering diameters have a (different) common nominal dimension. During the execution of the connection movement, the shaft-side centering cylinders are inserted into the hub-side centering cylinders, thereby bringing the two first centering cylinders into contact with each other and the two second centering cylinders into contact with each other, thus axially centering the shaft and the hub body on the longitudinal center axis of the assembly. It is further provided that the centering cylinders are designed such that the respective first centering diameter is smaller than a pitch circle diameter of the connecting length section and smaller than the respective second centering diameter.Furthermore, it is provided that the respective connecting length section is / will be arranged along a longitudinal center axis of the respective fastening partner between the respective first centering cylinder and the respective second centering cylinder. This stepped arrangement of the centering cylinders and the connecting length sections ensures that the fastening partners, i.e., the hub body and the shaft body, are aligned and centered with particular precision along the longitudinal center axis of the arrangement.

[0017] 24-0862 ABZ EXA 07.08.2024 Further training proposes that the first two centering diameters and / or the second two centering diameters be designed such that, during the execution of the connection movement between the fastening partners, an interference fit mediated by the corresponding centering cylinders is achieved. In this way, the shaft body and the hub body are connected to each other even more stably and securely.

[0018] In another possible embodiment, an axial dimension chain of the centering cylinders and the connecting section is designed such that, during the execution of the connecting movement, the two first centering cylinders and the two second centering cylinders initially overlap each other radially in an axial pilot centering dimension, before, as the connecting movement continues, the displacement of the material of the first connecting length section begins and the centering cylinders are moved further axially into each other.In this way, it is particularly efficiently ensured that when cutting and / or forming the first section of the connection length without chip formation, the connecting element is formed with exceptional precision, i.e., parallel to the longitudinal center axis of the assembly. This guarantees that, in the fastening arrangement, the longitudinal center axis of the hub body and the longitudinal center axis of the shaft body advantageously enclose only a very small tolerance angle, in particular no angle at all or an angle of 0 degrees. Thus, a particularly high degree of geometric accuracy is achieved during the manufacturing of the fastening arrangement. Furthermore, high coaxiality, i.e., low radial misalignment, is achieved, resulting in a particularly smooth running operation of the fastening arrangement.

[0019] Another possible embodiment of the method provides that an annular chamber is formed on an axial end face of the radial interference area during the execution of the joining movement. This chamber is bounded by an outer circumferential surface of the shaft body and an inner circumferential surface of the hub body. It is specifically designed that the annular chamber remains as part of the fastening assembly when the hub body and the shaft body are in their respective end positions. If the method involves the material of the first joining length section being displaced by machining, the annular chamber functions as a chip chamber into which the chips lifted from the first joining length section are moved and remain in the annular chamber in the ready-to-use fastening assembly. This ensures that when cutting into the first joining length section, the

[0020] 24-0862 ABZ EXA 07.08.2024 The execution of the joining movement is not disturbed by chips hindering the joining movement.

[0021] In another possible embodiment, a spur gear body is formed from the hub body, which is connected to the shaft body by means of the connecting device, by forming a toothed ring on an outer surface of the hub body. For this purpose, the connecting device is designed before the toothed ring is formed such that axial manufacturing forces acting on the hub body are transmitted via the connecting device into the shaft body without causing any axial movement of the hub body relative to the shaft body. However, the connecting device is specifically not designed to absorb dynamically changing axial forces acting on the hub body during operation. This allows for the simple and cost-effective production of the toothed ring when the hub body is already mounted on the shaft body as intended.However, potentially disruptive attachments such as a shaft nut or the like can be dispensed with during the manufacture of the gear ring, which further facilitates the handling of the fastening arrangement during the manufacture of the gear ring.

[0022] According to another possible embodiment of the fastening arrangement, the shaft body has a thread onto which a shaft nut is screwed, with the hub body being axially clamped along the longitudinal center axis of the arrangement between the shaft nut and a clamping shoulder of the shaft body. Clamping the hub body between the clamping shoulder and the shaft nut ensures that the dynamically changing axial forces acting on the hub body during operation are transferred into the shaft body without causing axial movement of the hub body relative to the shaft body. This is because the axial forces in operation are greater—in particular, many times greater, for example, by one or more orders of magnitude—than the axial forces encountered during manufacturing.

[0023] Further features of the invention may become apparent from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features shown below in the description of the figures and / or in the figures themselves, are not only described in the respective

[0024] 24-0862 ABZ EXA 07.08.2024 specified combination, but can also be used in other combinations or on its own without leaving the scope of the invention.

[0025] The drawing shows in

[0026] Fig. 1 shows a schematic and cutaway view of a fastening arrangement in which a fastening partner designed as a hub body and a fastening partner designed as a shaft body are connected to each other in a rotationally fixed manner.

[0027] Fig. 2 shows an enlarged view of an area of ​​the fastening arrangement marked n in Fig. 1,

[0028] Fig. 3 shows a perspective view of the wave body and

[0029] Fig. 4 shows a view of the fastening arrangement, in particular its connecting device, cut along a section plane IV-IV (see Fig. 1, Fig. 2).

[0030] The following describes a method for manufacturing a fastening arrangement 1, the fastening arrangement 1 itself, a motor vehicle assembly comprising the fastening arrangement 1, and a motor vehicle comprising the motor vehicle assembly. In the figures, identical and functionally equivalent elements are designated with the same reference numeral. The motor vehicle assembly and the motor vehicle are not shown in the figures.

[0031] According to the present example, the motor vehicle is designed as a purely electric or hybrid-electric vehicle and accordingly has an electric machine as its traction machine. Furthermore, the motor vehicle includes the motor vehicle assembly comprising the mounting arrangement 1, wherein the motor vehicle assembly is, for example, a transmission of the motor vehicle. In particular, the transmission is a differential transmission, a gear-shift transmission, a reduction gear, etc. The motor vehicle can have exactly one, two, or more mounting arrangements 1, whereby the use of the respective mounting arrangement 1 is not limited to the aforementioned motor vehicle transmission. For example, it can be provided that

[0032] 24-0862 ABZ EXA 07.08.2024 states that the motor vehicle has the mounting arrangement 1 in the area of ​​a cardan shaft or wheel drive shaft. Generally, it is conceivable to use the mounting arrangement 1 on board the motor vehicle at any possible location where a shaft and a hub are connected or are connected to each other for torque transmission.

[0033] Fig. 1 shows a schematic and sectional view of the fastening arrangement 1, in which two fastening partners 2, 3 are connected to each other in a rotationally fixed manner. One of the fastening partners 2, 3, here fastening partner 2, is designed as a hub body 4, whereas the other fastening partner 2, 3 – here fastening partner 3 – is designed as a shaft body 5. One of the fastening partners 2, 3 is manufactured with a straight-circle cylindrical first connecting length section 6. The other fastening partner 2, 3 is manufactured with a second connecting length section 7 that deviates from a straight circular cylinder. According to the embodiment of the fastening arrangement 1 shown in the Fig., the first, or straight-circle cylindrical, connecting length section 6 is designed as a hollow cylindrical hub 8 of the hub body 4.Accordingly, the second connecting length section 7, which deviates from a straight circular cylinder, is formed on the shaft body 5. A further embodiment of the fastening arrangement 1, in which the second connecting length section 7, which deviates from a straight circular cylinder, is formed as a non-circular hub of the hub body 4, is not shown in the figures. Apart from the fact that in the first embodiment of the fastening arrangement 1 shown in the figures, the first connecting length section 6 is formed on the hub body 4, whereas in the second embodiment of the fastening arrangement 1, the first connecting length section 6 is formed on the shaft body 5, the two embodiments do not differ further.

[0034] The fastening partners 2, 3 and the bodies 4, 5 are arranged along a longitudinal center axis 9 of the fastening arrangement 1. This serves to prepare for the assembly or joining of the two bodies 4, 5. It can be seen in the figures that, during the manufacture of the fastening partners 2, 3 and the bodies 4, 5, the connecting length sections 6, 7 are designed such that they overlap each other by a radial overlap dimension 11 (see Fig. 4) along the longitudinal center axis 9 of the arrangement, at least in a radial interference range 10. The fastening partners 2, 3 are then moved translationally towards each other along the longitudinal center axis 9 in a joining movement, whereby the shaft body 5 and the fastening partner 3 are inserted into the hub body 4.

[0035] 24-0862 ABZ EXA 07.08.2024 or is inserted into the fastening partner 2. During the execution of the translational joining movement, a joining device 12 is formed, by means of which the fastening partners 2, 3 or the hub body 4 and the shaft body 5 are connected to each other in a rotationally fixed manner, or, in the case of the fastening arrangement 1, are connected to each other in a rotationally fixed manner. The joining device 12 is formed during the process by displacing material of the first joining length section 6 by means of the interference area 10. Although it may be provided that the material of the first joining length section 6 is displaced without chips during the formation of the joining device 12, in the present example it is provided that the material of the first joining length section 6 is displaced by chips during the formation of the joining device 12.During the manufacturing of the connecting device 12, material is removed from the first connecting length section 6 by machining. The chips, which are lifted from the first connecting length section 6 at or by means of an axial end face 13 of the radial interference area 10 during the execution of the connecting movement, are guided into an annular chamber 14, which is bounded by an outer circumferential surface of the shaft body 5 and an inner circumferential surface of the hub body 4. In this case, the annular chamber 14 functions as a chip chamber.

[0036] In this case, the second connecting length section 7 – here on the shaft body 5 – is created by forming a multi-drive structure 15 (see Fig. 4) on the outer circumferential surface of the shaft body 5, which is bonded to the shaft body 5. For the other embodiment of the fastening arrangement 1, not shown in the figures, the second connecting length section 6 – then on the hub body 4 – is created by forming the multi-drive structure on an inner circumferential surface of the hub body 4, in particular on its hub 8. In this example, the multi-drive structure 15 is designed as a knurled surface, which means that the connecting device 12 is designed as a knurled press fit.

[0037] Fig. 1 further shows that the shaft body 5 has a thread 16 onto which a shaft nut 17 is screwed. The hub body 4 is axially clamped along the longitudinal center axis 9 of the arrangement between the shaft nut 17 and a clamping shoulder 18 of the shaft body 5. Fig. 1 also shows that a bearing arrangement 19 is arranged between the hub body 4 and the shaft nut 17, which-

[0038] 24-0862 ABZ EXA 07.08.2024 before - merely by way of example - a four-point bearing 20 and a radial bearing 21. Consequently, the hub body 4 is clamped between the inner bearing rings 22 of the bearings 20, 21 and the clamping shoulder 18 by means of the shaft nut 17 clamping the inner bearing rings 22 in the direction of the clamping shoulder 18.

[0039] Fig. 2 shows an enlarged view of the area n of the fastening arrangement 1 marked in Fig. 1, showing that the hub body 4 or the fastening partner 2 has a first hub-side centering cylinder 23 with a first hub-side centering diameter 24. The shaft body 5 or the fastening partner 3 has a first shaft-side centering cylinder 26 with a first shaft-side centering diameter 26. Furthermore, the hub body 4 or fastening partner 2 has a second hub-side centering cylinder 27 with a second hub-side centering diameter 28. The shaft body 5 or fastening partner 3 has a second shaft-side centering cylinder 29 with a second shaft-side centering diameter 30. It should be understood that the hub-side centering cylinders 23 and 28 are each designed as hollow centering cylinders.In contrast, the shaft-side centering cylinders 25, 29 are designed as cylindrical sections along a longitudinal center axis of the shaft body 5, as can be clearly seen in Fig. 3. To ensure particularly precise centering of the bodies 4, 5 along the longitudinal center axis 9 of the assembly when the fastening arrangement 1 is assembled, the two first centering diameters 24, 26 and the two second centering diameters 28, 30 are each designed to correspond with each other. In the present example, the two first centering diameters 24, 26 and the two second centering diameters 28, 30 are designed such that an interference fit 31, 32 is produced by the centering cylinders 23, 25 and 27, 29 when the fastening partners 2, 3 – that is, between the shaft body 5 and the hub body 4 – are executed.During the execution of the connecting movement, the two first centering cylinders 23, 25 and the two second centering cylinders 27, 29 are brought into contact with each other, thereby axially centering the shaft body 5 and the hub body 4 on the longitudinal center axis 9 of the arrangement, and establishing the interference fits 31, 32 between the fastening partners 2, 3. It is provided – see Fig. 2 – that the respective first centering diameter 24, 26 is smaller than a pitch circle diameter 33 of the connecting length section 7 of the shaft body 5. Furthermore, the respective first centering diameter 24, 26 is smaller than the respective second centering diameter 28, 30. Therefore, the following applies:

[0040] 24-0862 ABZ EXA 07.08.2024 Method or in the fastening arrangement 1: first diameter 24, 26 < tip circle diameter 33 < second diameter 28, 30. In Fig. 1 and in Fig. 2 it can further be seen that the respective connecting length section 6, 7 is arranged along the respective longitudinal center axis of the respective fastening partner 2, 3 or along the arrangement longitudinal center axis 9 between the respective first centering cylinder 23, 25 and the respective second centering cylinder 27, 29. According to the present example, it is further provided that the annular chamber 14 is arranged or formed along the arrangement longitudinal center axis 9 between the connecting length sections 6, 7 and the second centering cylinders 27, 29.

[0041] Fig. 2 shows an axial dimension chain of the centering cylinders 23, 25, 27, 29 and the connecting sections 6, 7. Dimensions 34 denote the axial length of the respective first centering cylinder 23, 25, 35 the axial overlap length of the connecting length sections 6, 7, 36 the axial length of the multiple drive structure 15, and 37 the axial length of the second centering cylinders 27, 29. During the manufacture of the fastening partners 2, 3 or bodies 4, 5, the dimensions 34 to 37 are designed such that, during the execution of the joining movement, the two first centering cylinders 23, 25 and the two second centering cylinders 27, 29 initially overlap radially in an axial pilot centering dimension before, as the joining movement continues, the displacement, in particular cutting, of the material of the first connecting length section 6 begins and the centering cylinders 23, 25 and 27, 29 are moved further axially into one another.An axial length of the pilot centering gauge is designated by reference numeral 38 in Fig. 2. The axial length of the pilot centering gauge 38 corresponds to an axial length 39 of the annular gap designated 40 in Fig. 2.

[0042] In the present example, it is provided that a spur gear body is formed from the hub body 4, which is connected to the shaft body 5 by means of the connecting device 12, in which a toothed ring is formed on an outer surface of the hub body 4. For this purpose, in the method, the connecting device 12 is designed beforehand, i.e., before the toothed ring is produced, such that during the production of the toothed ring, which can be a spur, helical, double helical or herringbone gear, axial manufacturing forces acting on the hub body 4 are transmitted via the connecting device 12 into the shaft body 5 without any axial movement of the hub body 4 relative to the shaft body 5.

[0043] 24-0862 ABZ EXA 07.08.2024 Fig. 4 shows a sectioned view of the fastening arrangement 1 along the section plane IV-IV (see Fig. 1, Fig. 2), where the pitch circle diameter 33 of the multiple drive structure 15 or the knurling, an inner diameter 41 of the first connecting length section 6, and the radial overlap dimension 11 are indicated. Furthermore, it can be seen in Fig. 4 that the multiple drive structure 14 has a plurality of drive bodies 42 which – as already explained – together form the knurling. The drive bodies 42 or knurled teeth are equidistant from one another along an outer circumferential direction of the shaft body 5, in particular at a pitch of 1 millimeter. The drive bodies 42 and the knurled teeth have penetrated or been embedded in the hollow cylindrical hub 8 of the hub body 4.

[0044] The object of the invention is to realize a shaft-hub connection by means of a knurled press fit, which is specifically designed and configured to transmit dynamically changing torques. Centering seats are located axially in front of and behind the knurled press fit, ensuring the running accuracy of the hub body 4, which in this example is designed as a spur gear. In this example, the knurled press fit is designed as a cutting joint, so that although a joint pressure is generated during the knurling process, it is not strong enough to significantly widen the centering seats or centering cylinders during the cutting process. Thus, the interference fit between the centering cylinders 23, 25 and 27, 29 is not significantly reduced by cutting the knurled press fit. In other words, joint pressure can occur.The geometries of the components involved are designed to prevent the joint pressure from becoming so high that the press fits widen to such an extent that the axial machining forces can no longer be reliably transmitted. In fastening arrangement 1, axial operating forces are not secured via the knurled press fit, but rather via an axial clamping device, in this example implemented by the shaft nut 17. This results in a particularly robust, lightweight, and space-saving connection arrangement that can be implemented with exceptional process reliability.

[0045] The radial overlap dimension 11 of the radial interference area 10 or of the multiple drive structure 15, by which the radial interference area 10 is formed in this example, is designed such that a small centering diameter (smaller than a foot circle of the multiple drive structure 15) is located in front and a large centering diameter (larger than the head-

[0046] 24-0862 ABZ EXA 07.08.2024 (circular diameter 33) is located behind the connecting length sections 6, 7. The axial overlap length 35 of the connecting length sections 6, 7 is, for example, designed with a minimum of three millimeters – depending on the axial dimension chain – whereby the radial overlap dimension 11 is selected based on the torque to be transmitted. In this example, the radial overlap dimension 11 is specified as 0.3 millimeters.

[0047] The fastening arrangement 1 and its manufacturing process, as well as the motor vehicle assembly and the motor vehicle comprising the motor vehicle assembly, provide a respective possibility for solving the task explained at the outset, namely to create a particularly reliable, easy-to-manufacture and particularly versatile shaft-hub connection.

[0048] 24-0862 ABZ EXA 07.08.2024 Reference List

[0049] 1 Mounting arrangement

[0050] 2 fastening partners

[0051] 3 fastening partners

[0052] 4 hub bodies

[0053] 5 wave bodies

[0054] 6 first connection length section

[0055] 7 second connection length section

[0056] 8 hollow cylindrical hub

[0057] 9 Arrangement longitudinal center axis

[0058] 10 radial interference range

[0059] 11 Radial overlap measure

[0060] 12 Connection device

[0061] 13 Axial end face

[0062] 14 ring chamber

[0063] 15 Multiple-party structure

[0064] 16 threads

[0065] 17 Shaft nut

[0066] 18 Tension shoulder

[0067] 19 Storage arrangement

[0068] 20 four-point bearings

[0069] 21 radial bearings

[0070] 22 inner bearing ring

[0071] 23 first hub-side centering cylinder

[0072] 24 first hub-side centering diameter

[0073] 25 first shaft-side centering cylinder

[0074] 26 first shaft-side centering diameter

[0075] 27 second hub-side centering cylinder

[0076] 28 second hub-side centering diameter

[0077] 29 second shaft-side centering cylinder

[0078] 30 second shaft-side centering diameter

[0079] 31 Oversize fit

[0080] 24-0862 ABZ EXA 07.08.2024 32 Oversize fit

[0081] 33 Head circle diameter

[0082] 34 axial length of the first centering cylinders

[0083] 35 axial overlap length of the connecting length sections 36 axial length of the multiple drive structure

[0084] 37 axial length of the second centering cylinders

[0085] 38 axial pilot centering dimension

[0086] 39 axial length of the annular gap

[0087] 40 Annular gap 41 Inner diameter of the first connecting length section

[0088] 42 drive bodies

[0089] 24-0862 ABZ EXA 07.08.2024

Claims

Patent claims 1. Method for manufacturing a fastening arrangement (1) in which a fastening partner (2) designed as a hub body (4) and a fastening partner (3) designed as a shaft body (5) are connected to each other in a rotationally fixed manner, wherein - one of the fastening partners (2, 3) is manufactured with a straight-circle cylindrical, first connection length section (6), - the other of the fastening partners (2, 3) is produced with a second connection length section (7) that deviates from a straight circular cylinder, - the fastening partners (2, 3) are arranged along a longitudinal center axis (9) of the fastening arrangement (1), - the connecting length sections (6, 7) are designed such that they overlap each other by a radial overlap dimension (11) along the arrangement longitudinal center axis (9) at least in a radial interference area (10), - the fastening partners (2, 3) are moved translationally towards each other along the longitudinal center axis (9) of the arrangement in a connecting movement, thereby introducing the shaft body (5) into the hub body (4), - during the execution of the joining movement, a joining device (12) is formed which connects the fastening partners (2, 3) in a rotationally fixed manner by means of the excess area (10) displacing material of the first joining length section (6).

2. Method according to claim 1, characterized in that the second connection length section (7) is produced by forming a multi-driver structure (15) on a circumferential surface of the fastening partner (2, 3) which is materially bonded to the fastening partner (2, 3).

3. Method according to claim 2, characterized in that the multiple driver structure (15) is designed as knurling. 24-0862 ABZ EXA 07.08.2024 4. Method according to one of the preceding claims, characterized in that the straight-circle cylindrical first connection length section (6) is designed as a hollow cylindrical hub (8) of the hub body (4).

5. Method according to one of claims 1 to 3, characterized in that the second connecting length section (7) which deviates from a straight circular cylinder is designed as a non-circular hub (8) of the hub body (4).

6. Method according to one of the preceding claims, characterized in that, during the production of the connecting device (2), the material of the first connecting length section (6) is displaced by machining and / or without machining.

7. Method according to one of the preceding claims, characterized in that a first and a second centering cylinder (23, 25, 27, 29) are formed on each of the fastening partners (2, 3) such that, - that the first centering diameters (24, 26) of the first centering cylinders (23, 25) and the second centering diameters (28, 30) of the second centering cylinders (27, 29) each correspond to each other for centering, - that during the execution of the connecting movement the two first centering cylinders (23, 25) come into contact with each other and the two second centering cylinders (27, 29) come into contact with each other, thereby axially centering the shaft body (5) and the hub body (4) on the longitudinal center axis (9) of the arrangement, - that the respective first centering diameter (24, 26) is smaller than a pitch circle diameter (33) of the connecting length section (6, 7) and smaller than the respective second centering diameter (28, 30), - that the respective connecting length section (6, 7) is arranged along a longitudinal center axis of the respective fastening partner (2, 3) between the respective first centering cylinder (23, 25) and the respective second centering cylinder (27, 29). 24-0862 ABZ EXA 07.08.2024 8. Method according to claim 7, characterized in that the two first centering diameters (24, 26) and / or the two second centering diameters (28, 30) are designed such that when performing the connection movement between the fastening partners (2, 3) an interference fit (31, 32) mediated by the corresponding centering cylinders (23, 25, 27, 29) is produced.

9. Method according to one of claims 7 or 8, characterized in that an axial dimension chain of the centering cylinders (23, 25, 27, 29) and the connecting length sections (6, 7) is designed such that, during the execution of the connecting movement, the two first centering cylinders (25, 27) and the two second centering cylinders (27, 29) initially overlap each other radially in an axial pilot centering dimension (38), before, during further execution of the connecting movement, the displacement of the material of the first connecting length section (6) begins and the centering cylinders (23, 25, 27, 29) are moved further axially into one another.

10. Method according to one of the preceding claims, characterized in that an annular chamber (14) is formed on an axial end face (13) of the radial oversize area (10) during the execution of the connection movement, which is bounded by an outer circumferential surface of the shaft body (5) and an inner circumferential surface of the hub body (4).

11. Method according to one of the preceding claims, characterized in that a spur gear body is formed from the hub body (4), which is connected to the shaft body (5) by means of the connecting device, by forming a toothed ring on an outer cylindrical surface of the hub body (4), wherein the connecting device (12) is previously designed such that, during the production of the toothed ring, manufacturing axial forces acting axially on the hub body (4) are directed via the connecting device (12) into the shaft body (5) without causing an axial movement of the hub body (4) in relation to the shaft body (5). 24-0862 ABZ EXA 07.08.2024 12. Fastening arrangement (1) in which the shaft body (5) and the hub body (4) are rotationally fixed to one another by means of the method designed according to any one of claims 1 to 11.

13. Fastening arrangement (1) according to claim 12, characterized in that the shaft body (4) has a thread (16) onto which a shaft nut (17) is screwed, wherein the hub body (4) is axially clamped along the longitudinal center axis (9) of the arrangement between the shaft nut (17) and a clamping shoulder (18) of the shaft body (5).

14. Motor vehicle assembly, in particular motor vehicle transmission, with a fastening arrangement (1) designed according to claim 12 or 13.

15. Motor vehicle with a motor vehicle assembly designed according to claim 14. 24-0862 ABZ EXA 07.08.2024

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