Method for assembling a hub assembly

Abstract

Method for assembling a hub arrangement (1) with a plug-in section (3), wherein the plug-in section (3) has a toothed region (4), with a hub (7), wherein the hub (7) has a counter-toothed region (9), wherein the toothed region (4) engages in the counter-toothed region (9) so that the hub (7) is positively connected to the plug-in section (3) in a circumferential direction about a main axis (H) of the hub arrangement (1), with a grooved ring (12), wherein the plug-in section (3) has a plug-in groove (13) and the hub (7) has a hub groove (14), wherein the grooved ring (12) engages in the plug-in groove (13) and the hub groove (14) in the installed position so that the hub (7) is positively connected to the plug-in section (3) in the axial direction to the main axis (H), wherein the hub (7) has at least one axial opening (24) for inserting a tool section (27),in order to fix and / or hold the grooved ring (12) during assembly of the plug-in section (3), characterized in that the grooved ring (12) is pre-tensioned in the plug-in groove (13) by a clamping device in an assembled state, wherein the grooved ring (12) is held and / or fixed in the assembled state with a tool (25) in that at least one tool section (27) of the tool (25) holds the grooved ring (12) in the plug-in groove (13), wherein the plug-in section (3) is removed from the clamping device with the tool (25) as a subassembly (21), wherein the subassembly (21) is inserted into the hub (7), wherein the at least one tool section (27) passes through the axial opening (24) of the hub (7) in order to position the grooved ring (12) in the assembled state between the hub (7) and the plug-in section (3), wherein the tool (25) is subsequently removed from the hub assembly (1) is taken,to move the grooved ring (12) from the assembly state to the installation state in the installation position..,

Description

[0001] The invention relates to a method for assembling a hub assembly having the features of the preamble of claim 1.

[0002] In vehicle transmissions, it is often necessary to connect transmission components to one another in a rotationally fixed manner. Many applications require a shaft or axle to be connected to a component in a rotationally fixed manner. The component must be connected to the shaft or axle in a rotationally fixed manner in one direction. Form-lock connections are often used for this type of connection to either transmit or support torque. In addition to the connection in the rotational direction, the components must also be fixed to one another in the axial direction. This can be achieved by means of material-to-material, force-locking, or form-locking connections.

[0003] Especially for axial connections, positive-locking connections are often used, whereby the components are secured to each other via a retaining ring and thus connected in a positive-locking manner.

[0004] DE 10 2015 202 161 A1 discloses a connecting arrangement between two components for torque and axial force support, wherein a first component, as a cup element of an automatic transmission, and a second component, as a ring gear of the automatic transmission, are at least partially tubular and have teeth on the mutually facing end regions to form a frontal toothing for a releasable, positive connection. The teeth of the components form a crown toothing or claw toothing as a common toothing, wherein radially extending grooves are provided on the teeth of the components, which, when the teeth are axially joined, form a snap ring groove extending over the circumference of the toothing for receiving a snap ring for axially securing the two components. The snap ring provided in the snap ring groove has a conical shape in cross-section.

[0005] DE 10 2018 216 910 A1 discloses a transmission for a vehicle with an electric motor having a drive shaft, comprising at least a transmission housing and a transmission input shaft. The transmission input shaft is mounted on the transmission housing on the one hand and on the drive shaft on the other hand, and the transmission input shaft and the drive shaft are arranged coaxially and substantially axially staggered with respect to one another. The transmission input shaft and the drive shaft of the electric motor provide a connecting region, wherein the connecting region comprises an axial securing arrangement, whereby the transmission input shaft is connected to the drive shaft of the electric motor in a manner that prevents displacement relative to one another in the axial direction.

[0006] DE 10 2015 213 731 A1 discloses a connecting arrangement for a transmission device of a motor vehicle, comprising a first and a second shaft, wherein the first shaft has a first spline and the second shaft has a second spline, and wherein the two shafts are connected to one another in a rotationally fixed manner for torque transmission via the respective spline. The two shafts are axially secured by a retaining ring arranged substantially radially between the two shafts, wherein an elastic element for limiting axial play between the two shafts is arranged at least axially between the two shafts.

[0007] DE 10 2018 125 349 A1 discloses a connection arrangement for torque transmission, comprising a shaft journal and a hollow shaft connecting piece, which are connected to each other in a rotationally fixed manner via positive locking means for torque transmission. The shaft journal and the hollow shaft connecting piece have groove elements that interact with a retaining ring for axial locking. The groove element of the shaft journal is designed as an external groove, and the groove element of the hollow shaft connecting piece is designed as an external groove with two sector cutouts radially penetrating the hollow shaft connecting piece. The retaining ring penetrates the hollow shaft connecting piece in the area of ​​the sector cutouts and engages in the external groove of the shaft journal.The retaining ring extends over the entire circumference of the arrangement of shaft journal and hollow shaft connecting piece, wherein the retaining ring has two retaining ring elements extending over a partial circumference of the arrangement, which are connected to one another and are radially fixed.

[0008] DE 295 01 158 U1 shows a locking device for a drive shaft of a power-driven tool such as a brush cutter or lawn mower.

[0009] The object of the present invention is to propose a hub assembly characterized by simplified assembly. This object is achieved by a method having the features of claim 1. Preferred or advantageous embodiments of the invention emerge from the subclaims, the following description, and the accompanying figures.

[0010] The subject matter of the invention is a hub arrangement which is suitable and / or designed for a transmission device. The hub arrangement has a plug-in section as a component. In principle, the plug-in section can be, for example, a plug-in axle or a plug-in shaft or a plug-in pin. It is also possible for the plug-in section to form part of a wheel. The plug-in section has a toothed region. The toothed region is preferably designed as an axial toothed region, wherein the teeth extend in the axial direction. The toothed region can be a gear wheel region, so that it is or could be designed for a meshing coupling. Alternatively, however, the teeth can also be designed such that they are sufficient for a positive connection in the circumferential direction.For example, it is possible for only a few teeth, such as fewer than ten, to be provided in the circumferential direction, or for the teeth to be designed as webs, particularly axially extending webs. Preferably, the toothing area is designed as an external toothing area and / or is arranged on the outer circumference of the plug-in section.

[0011] The hub arrangement has a hub. In particular, the hub is designed as a machine element which can be pushed onto the plug-in section and / or wherein the plug-in section can be pushed into the hub. The hub has a mating toothing region, wherein the mating toothing region engages in the toothing region, in particular to form a positive-locking region. Due to the intermeshing of the toothing region and the mating toothing region and / or due to the positive-locking region, the hub is positively connected to the plug-in section in the circumferential direction. Preferably, the mating toothing region and the toothing region are complementary to one another. Alternatively or additionally, the mating toothing region and the toothing region engage with one another in such a way that they connect the plug-in section and the hub with low or even zero tolerances in the circumferential direction.Preferably, the counter-toothing region is designed as an internal toothing region and / or arranged on the inner circumference of the hub.

[0012] The hub arrangement has a grooved ring, wherein the grooved ring can be designed either as a grooved ring or as a lamellar ring. The grooved ring particularly preferably has an interruption so that its diameter can be reduced for assembly in an assembled state and has a larger diameter than the assembled state in an operating state. The grooved ring particularly preferably has freely extending ends which do not protrude beyond an inner diameter or an outer diameter, wherein the respective diameter is defined, for example, by a region of the grooved ring which is arranged diametrically or opposite the ends. The grooved ring is preferably made of metal.

[0013] The plug-in section has a plug-in groove, which is preferably circumferential. The hub has a hub groove, which is preferably circumferential. The plug-in groove and the hub groove are located at the same axial height. The grooved ring engages both the plug-in groove and the hub groove simultaneously, so that the hub is positively connected to the plug-in section in at least or exactly one axial direction relative to the main axis.

[0014] The hub assembly defines a main axis, with the plug-in section and the hub arranged coaxially with the main axis. The terms "outside" and "inside" are used below to define an axial direction, which are to be understood, for example, as relative positions to one another. Particularly preferably, the plug-in section is inserted into the hub in a plug-in direction, with outer components, surfaces, etc. being arranged in front of inner components, surfaces, etc. in the plug-in direction.

[0015] Within the scope of the invention, it is proposed that the hub has at least one axial opening, preferably several axial openings for holding the grooved ring and alternatively or additionally for inserting a tool section in order to fix the grooved ring during assembly of the plug-in section. From a structural point of view, the axial opening is therefore an axially continuous area in the hub which is suitable for reaching the grooved ring in order to fix it, in particular in the installed position in an assembled state. The axial opening has a minimum radial diameter of 3 mm, preferably 4 mm and in particular 5 mm. This minimum radial diameter ensures that the tool section can reach the grooved ring in the assembled state of the hub arrangement in order to fix it or manipulate it.

[0016] One consideration of the invention is that the grooved ring is a proven and secure means of fixing two components axially to one another. In principle, it is possible to attach the grooved ring to an outer side so that it can be held or fixed in place easily. However, the load distribution is often uneven when the grooved ring is positioned on the outer side. It is therefore advantageous to move the grooved ring axially further from the outer side, at least to an edge area or even to a central area of ​​the hub arrangement. The grooved ring is usually difficult to access in this position or is no longer accessible at all. In the invention, the axial opening ensures that the grooved ring can still be reached by a tool section even in the installed position, so that it can be held in an assembled state or fixed in the assembled state, for example during assembly.The invention thus allows for simplified assembly while simultaneously improving the functional properties of the hub assembly.

[0017] In a preferred embodiment of the invention, the axial opening is open radially inward at the edge. This represents a peripheral recess or opening. This embodiment has the advantage that the tool section can be positioned on the plug-in section to hold and / or fix the grooved ring in the assembled state while the assembly comprising the plug-in section and the tool section is inserted into the hub in the plug-in direction.

[0018] It is expedient for the axial opening to extend in the axial direction at least to the grooved ring and / or to the plug-in groove and / or to the hub groove. In principle, it would be conceivable for the axial opening to be shorter in the axial direction and for the grooved ring to be fixed or held in the assembled state by the hub during assembly. However, a more controlled assembly of the grooved ring and thus the plug-in section and the hub arrangement as a whole is achieved if the axial opening extends to the grooved ring, to the plug-in groove and / or to the hub groove, since the grooved ring can then be fixed or held until the installation position and only there is it released in order to switch from the assembled state to the installed state.

[0019] The mating toothing area of ​​the hub has mating teeth and mating tooth roots, wherein the mating teeth and mating tooth roots are preferably arranged alternately. With respect to the main axis, the mating teeth and the mating tooth roots each take up an angular segment, wherein the angular segments can be of the same or different design. The axial opening is provided in an angular segment of a mating tooth root. With a mating tooth root, the hub already has an axially running gap, so that the axial opening can be easily arranged. The advantage of using the angular segment of a mating tooth root is in particular that the load-bearing capacity of the hub is not reduced or only slightly reduced by the axial opening.

[0020] In one possible embodiment of the invention, the axial opening is recessed relative to at least one other counter-tooth base of the counter-toothing region. In other words, the axial opening extends radially to a larger outer diameter than at least one other counter-tooth base. In this embodiment, the axial opening is formed by an overlap of the counter-tooth base and another recess.

[0021] In a first possible implementation of the invention, the grooved ring is arranged in the axial direction in the toothing region and / or in the counter-toothing region, in particular in the positive-locking region. Thus, positive-locking regions are located on both axial sides of the grooved ring. Particularly preferably, the grooved ring is arranged centrally in the toothing region and / or the counter-toothing region. In this embodiment, the grooved ring is positioned particularly advantageously, as it is arranged centrally and in particular centrally in the toothing region. However, it is arranged in a way that is particularly difficult to access. Nevertheless, the axial opening makes it possible to mount the grooved ring, if necessary, together with the plug-in section, in the hub.Particularly preferably, a tooth of the toothing region is formed on both sides of the grooved ring in the same angular segment of the axial opening and / or a positive-locking region is located on both sides of the grooved ring in the same angular segment of the axial opening. This configuration further increases the difficulty of assembling the grooved ring. However, this difficulty can be compensated for by providing the axial opening. In this implementation, it is particularly preferred that the axial opening be recessed relative to at least one other counter-tooth base to ensure accessibility.

[0022] In a second embodiment of the invention, it is proposed that the entire toothing region and / or the entire counter-toothing region, in particular the positive-locking region, is / are arranged on one axial side of the grooved ring. Preferably, the toothing region, the counter-toothing region, and / or the positive-locking region are positioned exclusively on one axial side of the grooved ring. Particularly preferably, the respective toothing region, the counter-toothing region, and / or the positive-locking region are arranged on an outer side of the grooved ring. In this embodiment, it can be provided that the axial opening is formed by removing it from the rim.

[0023] Another subject of the invention relates to a transmission device, wherein the transmission device has the hub device as described above or according to one of the preceding claims. The plug-in section is particularly preferably designed as a ring gear of a planetary stage. The transmission device is particularly preferably designed, for example, as an electric drive for a vehicle. For example, the transmission device is realized as an electric axle with an electric motor. The hub arrangement preferably forms part of a planetary stage, wherein a drive torque of the electric motor is translated and / or divided in the planetary stage. In particular, the hub arrangement, as a planetary stage, can form a transmission section and / or a differential section.

[0024] Another object of the invention relates to a method for assembling the hub assembly as described above or according to one of the preceding claims. In the method, the grooved ring is preloaded in the plug-in groove into an assembled state. Preferably, the grooved ring is subjected to a radial force, so that the outer diameter of the grooved ring is reduced in the assembled state compared to the installed state. Preloading is performed by means of a clamping device, wherein the clamping device preferably has at least one actuator and is thus designed as an externally powered clamping device.

[0025] In the assembled state, the grooved ring is held and / or fixed in the plug-in groove with a tool. For this purpose, the tool has at least one, several, or a plurality of tool sections that hold the grooved ring in the plug-in groove.

[0026] Subsequently, the plug-in section with the grooved ring and the tool is removed from the clamping device as a subassembly, preferably as a self-retaining subassembly, in particular separated from it. In particular, the grooved ring is arranged in the subassembly in the assembled state.

[0027] The subassembly is inserted into the hub, with at least one tool section penetrating the axial opening of the hub. This allows the grooved ring to be moved into the installed position together with the plug-in section in the assembled state. The tool is then removed from the hub assembly, allowing the grooved ring to be released from the assembled state into the installed state and positioned in the installed position.

[0028] The mating toothing area of ​​the hub has mating teeth and mating tooth roots, wherein the mating teeth and mating tooth roots are preferably arranged alternately. With respect to the main axis, the mating teeth and the mating tooth roots each take up an angular segment, wherein the angular segments can be of the same or different design. The axial opening is provided in an angular segment of a mating tooth root. With a mating tooth root, the hub already has an axially running gap, so that the axial opening can be easily arranged. The advantage of using the angular segment of a mating tooth root is in particular that the load-bearing capacity of the hub is not reduced or only slightly reduced by the axial opening.

[0029] Further features, advantages, and effects of the invention will become apparent from the following description of preferred embodiments of the invention and the accompanying figures. These show: Fig. 1 a schematic three-dimensional representation of a hub arrangement as an embodiment of the invention; Fig. 2 and Fig. 3 each shows a schematic longitudinal section of the hub arrangement in the Fig. 1; Fig. 4 is an axial plan view of the hub assembly of the preceding figures; Fig. 5 is a schematic three-dimensional exploded view of a subassembly for mounting the hub assembly of the preceding figures; Fig. 6 a schematic three-dimensional representation of the hub arrangement; Fig. 7 a schematic longitudinal section of the hub arrangement in the Fig. 1 with tool inserted; Fig. Figure 8 is an axial plan view from the inside of the hub assembly of the preceding figures; Fig. 9 a schematic longitudinal section of the hub arrangement in the Fig. 1 with tool inserted; Fig. 10 is a schematic longitudinal sectional view of a hub assembly as a second embodiment of the invention; Fig. 11 an axial plan view of the hub arrangement of the Fig. 10; Fig. 12 a, b each show a schematic longitudinal section of the hub arrangement of the Fig. 10 and Fig. 11.

[0030] The Fig. 1 shows a schematic, three-dimensional representation of a hub assembly 1 as an exemplary embodiment of the invention. The hub assembly 1 forms part of a transmission device 2, wherein the transmission device 2 is designed, for example, as an electric drive for a vehicle. For example, the transmission device 2 is implemented as an electric axle with an electric motor. The hub assembly 1 forms, for example, part of a planetary stage, wherein a drive torque of the electric motor is translated and / or divided. In particular, the hub assembly 1, as a planetary stage, can form a transmission section and / or a differential section. The hub assembly 1 defines a main axis H.

[0031] The hub assembly 1 has a plug-in section 3, wherein the plug-in section 3 is designed as a ring gear. The plug-in section 3 has internal teeth, wherein the internal teeth in this embodiment are realized as helical teeth. In the gear device 2, planetary gears (not shown) mesh with the internal teeth of the plug-in section 3. The plug-in section 3 has a circumferential toothing region 4 which is formed on an outer circumference of the plug-in section 3. The toothing region 4 has teeth 5 and tooth roots 6 which are arranged alternately in the circumferential direction around the main axis H. The teeth 5 are designed as axially extending webs, the tooth roots 6 are arranged as axially extending grooves between the teeth 5.

[0032] The hub assembly 1 has a hub 7, wherein the hub 7 is stationary in a housing section 8 of the transmission device 2. The hub 7 has a counter-toothing region 9, wherein the counter-toothing region 9 is arranged, in particular formed, on an inner circumference of the hub 7. The counter-toothing region 9 has counter-teeth 10 and counter-tooth roots 11. The counter-teeth 10 and counter-tooth roots 11 are arranged alternately in the circumferential direction around the main axis H. The counter-teeth 10 are designed as axially extending webs, and the counter-tooth roots 11 are designed as axially extending grooves.

[0033] When the hub arrangement 1 is assembled, the toothing area 4 engages in the counter-toothing area 9, so that the plug-in section 3 and the hub 7 are positively connected to one another in the circumferential direction around the main axis H.

[0034] The hub assembly 1 has a grooved ring 12 for axially securing the plug-in section 3 of the hub 7. The grooved ring 12 is designed as a metal ring and has an interruption in the circumferential direction around the main axis H. To accommodate the grooved ring 12, the plug-in section 3 has a circumferential plug-in groove 13 and the hub 7 has a circumferential hub groove 14. In an operating position, the grooved ring 12 engages in both the plug-in groove 13 and the hub groove 14. Thus, the plug-in section 3 is secured in the axial direction with respect to the main axis H in the hub 7. Overall, the hub assembly 1 creates a shaft / axle-hub connection.

[0035] During operation, drive torques are supported via the plug-in section 3 and corresponding forces are directed into the housing section 8.

[0036] The Fig. Figure 2 shows a three-dimensional view of a longitudinal section through the hub assembly 1, wherein the longitudinal section is laid through a tooth base 6 of the toothing area 4 and / or through a counter tooth 10 of the counter toothing area 9. Thus, the hub 7 can be seen in the upper area and the plug-in section 3 in the lower area.

[0037] During assembly, the plug-in section 3 is inserted into the hub 7 in a plug-in direction S, wherein the hub 7 forms an axial end stop for the plug-in section 3 in the plug-in direction S. Surfaces which are at the front in the plug-in direction S are referred to as inside or inboard, surfaces which are at the rear in the plug-in direction S are referred to as outside or outboard.

[0038] The plug-in groove 13 is arranged in the plug-in section 3, wherein the plug-in groove 13 has an outer plug-in groove wall 15a and an inner plug-in groove wall 15b. The hub groove 14 has an inner hub groove wall 16a and an outer hub groove wall 16b. The grooved ring 12 has an inner side surface 17a and an outer side surface 17a, wherein the side surfaces 17a, b face axially outward.

[0039] In the installed state of the grooved ring 12 and in its installed position, the inner side surface 17 a of the grooved ring 12 physically abuts and / or touches the inner plug-in groove wall 15 a. The outer side surface 17 b of the grooved ring 12 physically abuts and / or touches the outer hub groove wall 16 b in the installed state. This results in a flow of force between the outer plug-in groove wall 15 a or the side surface of the toothing region 4 via the outer side surface 17 a of the grooved ring 12 via the grooved ring 12 to the inner side surface 17 b of the grooved ring 12 and subsequently to the outer hub groove wall 16 b.

[0040] The groove width of the plug-in groove 13 corresponds to the width of the grooved ring 12. Thus, the outer plug-in groove wall 15b can also physically and / or contactingly bear against the outer side surface 17b of the grooved ring 12 in the installed state. The inner hub groove wall 16a, on the other hand, is spaced apart or arranged with a tolerance to the inner side surface 17a. The axial securing of the plug-in section 3 in the plug-in direction S is thus taken over by the axial end stop of the hub 7, while the axial securing of the plug-in section 3 in the opposite direction to the plug-in direction S and thus in the disassembly direction is taken over by the grooved ring 12.

[0041] The hub groove 14 has a hub groove bottom 18, wherein the hub groove bottom 18 is designed in the insertion direction in the longitudinal section shown so that the radius becomes smaller and / or is formed as a slope, so that the grooved ring 12 can bear force-fittingly against the hub groove bottom 18 with a corner region.

[0042] The inner diameter of the grooved ring 12 is dimensioned in the installed state such that it is smaller than the outer diameter of the plug-in section 3 in a tooth root 6. In contrast, the outer diameter of the grooved ring 12 is dimensioned in the installed state such that it is larger than an inner diameter of the hub 7.

[0043] The toothing area 4 and the counter-toothing area 9 together form a positive-locking area 19 in the circumferential direction around the main axis H. The positive-locking area 19, the toothing area 4 and / or the counter-toothing area 9 are limited to an inner axial side toward the grooved ring 12. On the outer axial side toward the grooved ring 12, the hub 7 and the plug-in section 3 are designed to be non-engaging with one another in the circumferential direction around the main axis H.

[0044] On the inner axial side of the grooved ring 12, a radial gap 20 is provided between the plug-in section 3 and the hub 7, which is continuous in the circumferential direction around the main axis H. The radial gap 20 is delimited radially inward by tooth ribs 22 and radially outward by mating tooth ribs 23, wherein the tooth ribs 22 form axial extensions of the teeth 5 and the mating tooth ribs 23 form axial extensions of the mating teeth 10, wherein the tooth height of the ribs 22, 23 is reduced in the radial direction compared to the teeth 5 and mating teeth 10, so that the tooth ribs 22 and the mating tooth ribs 23 are arranged without engagement with one another in the circumferential direction. The radial gap 20 is thus formed radially inward by a shortening of the teeth 5 and radially outward by a shortening of the mating teeth 10.

[0045] The Fig. 3 shows in the same representation as in the Fig. 2 shows the grooved ring 12 in an assembled state, wherein the grooved ring 12 is clamped radially inward, so that its outer diameter is reduced. In the assembled state, the outer diameter of the grooved ring 12 is smaller than the outer diameter of the radial gap 20, so that an assembly gap remains, allowing a subassembly 21 comprising the plug-in section 2 and the grooved ring 12 to be inserted into the hub 7 in the insertion direction without collision during assembly.

[0046] The Fig. Figure 4 shows the hub assembly 1 in an axial plan view from the outside, showing the plug-in section 3 and the hub 7, as well as the grooved ring 12. This illustration shows, on the one hand, the tooth ribs 22 and the counter-tooth ribs 23 and the resulting radial gap 20. Between the counter-tooth ribs 23, the counter-tooth bases 11 can be seen, which simultaneously form axial openings 24. From a structural perspective, the axial openings 24 in this exemplary embodiment correspond to the counter-tooth bases 11 in an axial plan view. The axial openings 24 are open radially inward at the edges.

[0047] A method for assembling the plug-in section 3 with the grooved ring 12 into the hub 7 is explained below: The Fig. 5 shows the subassembly 21, which comprises the plug-in section 3, the grooved ring 12, and a tool 25, or is formed by these components. The tool 25 has a support body 26, which is designed as an annular disk. On one axial side, a plurality of tool sections 27, which are implemented as axially extending bolts, are arranged on the support body 26. The tool sections 27 are arranged in the same grid in the circumferential direction as the mating tooth roots 11 of the mating toothing region 4 of the hub 7. The inner circumference formed by the tool sections 27 is dimensioned such that the tool sections 27 bear against the grooved ring 12 in the assembled state. The tool sections 27 are thus distributed such that the tool 25 can be pushed onto the plug-in section 3, and the tool sections 27 are arranged at the same angular positions as the teeth 5. The tool 25 is designed as a rigid tool.

[0048] During assembly of the plug-in section 3, the grooved ring 12 is brought from an expanded operating state into an assembled state by radial forces in a first process step. A clamping device (not shown) is used for this purpose. Subsequently, the tool 25 is placed onto the plug-in section 3, with the tool sections 27 holding and / or fixing the grooved ring 12 in the assembled state, thereby forming the subassembly 21. In a next process step, the subassembly 21 is separated from the clamping device.

[0049] In the Fig. 6 shows how the subassembly 21 is inserted into the hub 7 in the assembled state, wherein the grooved ring 12 is held in the assembled state by the tool sections 27 during insertion.

[0050] The Fig. 7 shows in a similar representation as the Fig. 2 and Fig. 3 shows the insertion of the subassembly 21 into the hub 7. It can be seen that the tool sections 27 of the tool 25 are retracted into the counter-tooth bases 11 and / or axial openings 24. The counter-tooth bases 11 and / or axial openings 24 are dimensioned in the axial direction such that the subassembly 21, and in particular the grooved ring 12, can be positioned into the installation position. The tool 25 can then be removed, and the hub assembly 1 is assembled. The advantage of this method is that only the comparatively lightweight tool 25, without a clamping device, is used for assembly.

[0051] The Fig. Figure 8 shows the hub assembly 1 in an axial plan view from the inside against the plug-in direction S. The plug-in section 3, the grooved ring 12, and the hub 7 can each be seen in sections. The grooved ring 12 lies in the plug-in groove 13 of the plug-in section 3, with the toothed rims 22 of the plug-in section 3 being concealed by the grooved ring 12. On the hub 7, however, the counter-toothed rims 23 can be seen, with the tool sections 27 being arranged between the counter-toothed rims 23 in the counter-tooth bases 11 and / or in the axial openings 24, and fixing the grooved ring 12 radially inward in the assembled state.

[0052] The Fig. 9 shows a similar representation as in the Fig. 7 shows the hub assembly 1, wherein the tool 25 additionally has a holding device 28 for positively holding the plug-in section 3 in the subassembly 21. The holding device 28 is designed as a pivotable hook which engages around the plug-in section 3 from the radial inside in order to fix it to the tool 25, in particular to the support body 26. In the installed position, the hook device 28 can be pivoted open, so that the coupling between the plug-in section 3 and the tool 25 is released and the tool 25 can be removed from the subassembly 21 and / or the hub assembly 1.

[0053] The Fig. Figure 10 shows a hub assembly 1 as a further embodiment of the invention in the longitudinal section of the preceding figures. For the basic structure of the hub assembly 1, reference is made to Fig. 1 and the related description, since the hub arrangement in 1 of the embodiments differs only in the position and assembly of the grooved ring 12.

[0054] In the hub arrangement 1 of the Fig. 10, the grooved ring 12 is arranged centrally in the toothing area 4 and / or the counter-toothing area 9 and / or the positive-locking area 19. The longitudinal section shown shows a tooth base 6 of the plug-in section 3 and a counter-tooth 10 of the hub 7. The central positioning of the grooved ring 12 allows for a larger overall width of the positive-locking area 19 compared to the previous embodiment. However, the assembly of the grooved ring 12 is even more complex.

[0055] The Fig. 11 shows an axial plan view of the hub assembly 1, wherein it can be seen that the hub 7 has counter-tooth bases 11, which are regularly distributed in the circumferential direction and into which teeth 5 of the plug-in section 3 engage. In this exemplary embodiment, every fifth counter-tooth base 11 is recessed relative to the adjacent counter-tooth bases 11 and thus forms an axial opening 24 for manipulating the grooved ring 12.

[0056] In this embodiment, the axial openings 24 are produced by drilling a bore 29 from the counter tooth bases 11. In other embodiments, the axial openings 24 can also be produced entirely by primary forming or by other means.

[0057] The Fig. 12 a, b show the hub assembly 1 in a longitudinal section in the region of an axial opening 24, such that the counter tooth base 11 is superimposed with the bore 29. The axial opening 24 provides access to the grooved ring 12, allowing it to be manipulated in the installed position and, in particular, brought into the assembled state. The axial opening 24 is arranged in the same angular segment as the counter tooth base 11, such that the deepening of the counter tooth base 11 to create the axial opening 24 reduces the load-bearing capacity of the hub 7 only slightly and / or negligibly.

[0058] During assembly, as previously described, the grooved ring 12 is first brought from the operating state into an assembled state using the clamping device (not shown). Subsequently, a tool is attached which is designed like the tool 25 and which holds the grooved ring 12 in the assembled state with tool sections 27. In a further step, the subassembly 21 comprising the plug-in section 3, the grooved ring 12 and the tool is inserted into the hub 7 as a self-retaining assembly. However, it should be noted that the grooved ring 12 is not only flush with the teeth 5 in the assembled state, but - as shown in the Fig. 12b - must be set back. For this purpose, the tool sections 27 can, for example, be offset or pivotable. The tool can then be removed, allowing the grooved ring 12 to snap into the hub groove 14. List of reference symbols 1 hub arrangement 2 Gear device 3 plug-in section 4 Gearing area 5 teeth 6 dental reasons 7 Hub 8 Housing section 9 Counter-toothing area 10 opposing teeth 11 reasons for opposing teeth 12 Grooved ring 13 Plug-in groove 14 Hub keyway 15 a,b inner and outer slot wall 16a,b inner and outer hub groove wall 17 a,b inner and outer side surface of the grooved ring 12 18 Hub groove bottom 19 Form-fitting area 20 Radial gap 21 Subassembly 22 tooth rims 23 opposing tooth rims 24 axial openings 25 tools 26 supporting bodies 27 tool sections 28 Holding device 29 Hole H main axis S Plug direction

Claims

[1] Method for assembling a hub arrangement (1) with a plug-in section (3), wherein the plug-in section (3) has a toothed region (4), with a hub (7), wherein the hub (7) has a counter-toothed region (9), wherein the toothed region (4) engages in the counter-toothed region (9), so that the hub (7) is positively connected to the plug-in section (3) in a circumferential direction about a main axis (H) of the hub arrangement (1), with a grooved ring (12), wherein the plug-in section (3) has a plug-in groove (13) and the hub (7) has a hub groove (14), wherein the grooved ring (12) engages in the plug-in groove (13) and in the hub groove (14) in the installed position, so that the hub (7) is positively connected to the plug-in section (3) in the axial direction to the main axis (H), wherein the hub (7) has at least one axial opening (24) for inserting a tool section (27),to fix and / or hold the grooved ring (12) during assembly of the plug-in section (3), characterized bythat the grooved ring (12) is pre-tensioned in the plug-in groove (13) by means of a clamping device in an assembled state, wherein the grooved ring (12) is held and / or fixed in the assembled state with a tool (25) in that at least one tool section (27) of the tool (25) holds the grooved ring (12) in the plug-in groove (13), wherein the plug-in section (3) with the tool (25) is removed from the clamping device as a subassembly (21), wherein the subassembly (21) is inserted into the hub (7), wherein the at least one tool section (27) passes through the axial opening (24) of the hub (7) in order to position the grooved ring (12) in the assembled state between the hub (7) and the plug-in section (3), wherein the tool (25) is subsequently removed from the hub arrangement (1) in order to move the grooved ring (12) from the assembled state into the installed state in the installed position bring.. [2] Method for assembling the hub assembly (1) according to claim 1, characterized bythat the axial opening (24) is open radially inwards at the edge. [3] Method for assembling the hub assembly (1) according to claim 1 or 2, characterized by that the axial opening (24) extends in the axial direction at least to the grooved ring (12) and / or to the plug-in groove (13) and / or to the hub groove (14). [4] Method for assembling the hub assembly (1) according to one of the preceding claims, characterized by that the axial opening (24) is arranged in the angular segment of a tooth base (6) of the counter-toothing area (9). [5] Method for assembling the hub assembly (1) according to claim 4, characterized by that the axial opening (24) is recessed relative to at least one further tooth base (6) of the counter-toothing region (9). [6] Method for assembling the hub assembly (1) according to one of the preceding claims, characterized bythat the grooved ring (12) is arranged in the axial direction in the toothing area (4) and / or in the counter-toothing area (9). [7] Method for assembling the hub assembly (1) according to one of the preceding claims 1 to 5, characterized by that the entire toothing area (4) and / or the entire counter-toothing area (9) is / are arranged on one axial side of the grooved ring (12). [8] Method according to claim 1, characterized by that the axial opening (24) in the angle segment is arranged in a counter tooth base (11) of the counter toothing area (9).

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