Modular axle system for supporting at least one bearing component

Abstract

Disclosed is an axle (1) for supporting at least one bearing component (2, 4), wherein: the at least one bearing component is arranged circumferentially around the axle; the axle system consists of at least two axle segments (6, 8) arranged behind one another in the axial direction; at least one of the two axle segments has an axial through-bore (10) and the other of the two axle segments has an axial blind bore or an axial through-bore (12); the at least two axle segments are coupled to one another by means of a bolt (14) arranged in the axial through-bore and the axial blind bore or in the axial through-bore; each of the at least two axle segments has a circumferentially arranged stop element (36, 38); the at least one bearing component is arranged between the stop elements; and the bolt is designed to exert a preload on the at least one bearing component via the stop elements.

Description

[0001] Schweinfurt, February 17, 2023

[0002] 202200222

[0003] Description

[0004] Modular axis system for supporting at least one bearing component

[0005] The present invention relates to a modular axle system for supporting at least one bearing component according to the preamble of patent claim 1.

[0006] Axles, especially transmission axles, are generally used to support bearing components. Such bearing components can be gears, for example gear pairs, or rolling or plain bearings. In order to attach the bearing components, e.g. inner rings of rolling or plain bearings or gears, to the axles, the bearing components were previously either welded to the axles, fixed by shaft-hub connections (e.g. wedges, keys) or by means of screw connections, i.e. a screw and nut pair secured and preloaded to the axle, or both. Welding gear pairs in particular has the disadvantage that if the gears or one of the gears wears, replacement is not easily possible. The use of screw and nut pairs, on the other hand, leads to an increased axial space requirement, which may not be available in some circumstances, or there may not be sufficient space for an assembly tool.

[0007] It is therefore an object of the present invention to provide an axle system, in particular for a transmission axle, which has advantages with regard to the replacement of components by storing, positioning and / or clamping or fixing with a defined axial force, with a reduced space requirement.

[0008] This object is achieved by a modular axis system for supporting at least one bearing component according to claim 1. The proposed modular axis system is designed for supporting at least one bearing component. In particular, the axis system serves not only for supporting at least one bearing component, but also for positioning and / or clamping or fixing it with a predefined force, as explained in more detail below.

[0009] The bearing component can be an inner ring of a plain bearing or a rolling bearing, e.g. a ball or roller bearing, or other types of bearing. Alternatively, the bearing component can also be a gear, e.g. a gear of a gear pair. The at least one bearing component can also be a rolling bearing pair, or a paired rolling bearing with a common outer ring. Furthermore, more than one bearing component, e.g. two gears of a gear pair or a double-row bearing arrangement or a rolling bearing or plain bearing pair, or a combination thereof, can be mounted on the axle. The at least one bearing component is arranged circumferentially around the axle.

[0010] To ensure the bearing component is securely seated on the axis system (hereinafter also referred to as the axis), i.e., in particular, to ensure a predefined position of the at least one bearing component on the axis system during operation, the modular axis system consists of at least two axis segments arranged one behind the other in the axial direction. In addition to the predefined position, a defined axial preload can also be achieved, e.g., axial compression as an anti-twist device or setting a defined bearing preload. This increases the bearing service life and bearing rigidity.

[0011] At least one of the two axle segments has an axial through-bore. The other axle segment can also have an axial through-bore. Alternatively, the other axle segment can also have only an axial blind bore that does not extend over the entire axial length of the axle segment. The two axle segments are coupled to one another by means of a screw arranged in the axial through-bore and the blind hole or through-bore. This coupling consists of both an alignment of the two axle segments to one another and a connection of the two axle segments to one another. Each of the at least two axle segments has a circumferentially arranged stop element, wherein the at least one bearing component is arranged between the stop elements.This means that the at least one bearing component, viewed in the axial direction, is held in its axial position by the stop elements on both sides. In particular, the at least one bearing component can be arranged with preload or clearance based on the defined resulting geometric conditions (i.e., gap or interference).

[0012] The screw is then designed to exert a preload in the axle system, and in particular on the at least one bearing component, via the stop elements. This preload, which is created at least by the interaction of the two stop elements and the screw, makes it possible to secure the at least one bearing component in a predefined position between the two stop elements on the axle.

[0013] In contrast to previous arrangements, which required either a welded joint or a screw-and-nut connection, only the stop elements are necessary here, which, especially compared to a screw-and-nut connection, require less space. Furthermore, the preload allows a predefined bearing component preload and / or bearing component play to be achieved during assembly, which can also be maintained during operation. Furthermore, if at least one bearing component becomes worn, simple replacement is possible, since only the two axle segments need to be disassembled by loosening the screw in order to then remove the bearing component from the axle and replace or repair it.

[0014] According to one embodiment, the screw has a stop surface at one axial end, which rests against a first end face of the first axle segment. This stop surface has the function of supporting the screw against the stop surface so that it cannot slip through the through-bore in the first axle segment. Furthermore, pressure can be exerted on the first axle segment via this stop surface in order to indirectly apply the preload to the entire axle system. The preload on the at least one bearing component is adjusted by the defined resulting geometric conditions. At least at the other axial end, the screw has an external thread, and the through-bore or blind hole of the second axle segment has a corresponding internal thread, at least in a partial area.Alternatively, the screw can also have an external thread over its entire length or part of its length. The external diameter of the screw, including the thread, is preferably smaller than the internal diameter of the first axis segment and smaller than the diameter of the second axis segment in the area without an internal thread. In this way, the screw can be passed through the first axis segment and the second axis segment until the external thread of the screw engages with the internal thread of the second axis segment to clamp the axis system. This process can be improved if the screw only has a thread over part of its length, since the part of the screw without a thread can simply be passed through the first and second axis segments, thus reducing the risk of jamming.

[0015] The screw serves to connect the two axle segments and to clamp them together. This clamping can simultaneously exert a preload on at least one bearing component. Through the interaction between the internal and external threads of the screw and the through-hole, the preload between the first axle segment and the second axle segment, and thus between the stop elements and thus the preload on at least one bearing component, can be controlled by the defined gap or the defined oversize. If the screw is screwed in further, the preload is increased; if the screw is unscrewed again, the preload is reduced.

[0016] The axis system can also be adjusted so that the screw is tightened to its maximum permissible tightening torque in order to robustly preload the modular axis system against axial forces, transverse forces, and bending moments. At the same time, the geometric conditions between the axis elements, in conjunction with the stop elements and the overall width of the at least one bearing component, define its preload or clearance on the axis. In addition, the positive-locking anti-rotation device of the screw reliably secures the preloaded axis system. According to a further embodiment, the first and second axis segments have corresponding alignment elements to align the two axis segments coaxially with each other.In particular, the alignment elements can comprise an axially directed, cylinder-jacket-shaped projection, also called a collar, arranged on an end face of one of the axle segments, and a corresponding recess arranged on an end face of the other axle segment, wherein the projection is designed to engage into the recess. These interacting projections and recesses can achieve particularly good alignment of the first and second axle segments. The two axle segments can also have further interlocking elements and / or additional elements provided separately from the two axle segments can be used to improve the alignment and connection of the two axle segments and to adjust the preload of the at least one bearing component.

[0017] According to a further embodiment, the second axial end face of the first axle segment and the first axial end face of the second axle segment are arranged with a gap or a geometric excess relative to one another, wherein the screw is designed to adapt a defined preload force acting on the at least one bearing component by adjusting the tensile stress generated by the screw. In particular, the size of the gap or the excess is adapted, which in turn sets the preload on the at least one bearing component. By adjusting this gap, the preload between the first and second axle segments, and thus the preload between the stop elements, and thus also the preload on the at least one bearing component, is adapted and controlled.

[0018] The screw, or rather its clamping with the two axle segments, results in defined geometric conditions (particularly in the form of a gap or interference). The defined resulting geometric conditions (gap or interference), which determine the preload or clearance for the at least one bearing component, are composed of the gap / interference between the two end faces of the axle elements in conjunction with the overall width of the at least one bearing component and the defined position of the stop elements of the axle components. This controlled geometric arrangement allows for a robust and discretely adjustable, reliable preload or clearance for the at least one bearing component. The resulting geometrically defined gap / interference is responsible for the preload.

[0019] The bolt tensile stress can also be increased to a maximum. Such a maximum bolt tensile stress, applied to the material limit, increases the overall preload in the axle system and thus the rigidity for the axle's application, e.g., in a gearbox. At the same time, at least one bearing component could be preloaded with a lower axial force, since the resulting geometrically defined gap or the interference between the two axle segments determines the individual axial preload on at least one bearing component.

[0020] The modular axis system allows different axial preload forces for at least one bearing component on a single axis system, with a single screw connection, due to the defined resulting geometric conditions (gap or interference).

[0021] The axle system can consist of more than two axle segments. In this case, two adjacent axle segments can each have corresponding projections and recesses that interlock and are designed to coaxially center the axle segments relative to one another. As already described above, one axle segment can have a projection (e.g., a collar) and the adjacent axle segment can have a recess. An axle segment can also have a projection on both axial sides or a recess on both axial sides. However, two adjacent axle segments should have corresponding elements that can interlock to ensure a secure connection and coaxial alignment between two adjacent axle segments.

[0022] According to a further embodiment, the further axle segments also have further circumferential stop elements for the at least one bearing component and / or for one or more further bearing components. It should be noted that, in order to be able to apply a predefined preload to the respective bearing component, the stop elements, which are arranged on both sides of a bearing component, should preferably be provided on two different axle segments. The respective stop elements for a bearing component do not have to be provided on two adjacent axle segments; rather, further axle segments can also be arranged in between. Furthermore, two stop elements do not have to be provided for each bearing component; rather, several bearing components can also be arranged between two stop elements. One stop element can also serve as a stop element for two bearing components, e.g.in one axial direction for one bearing component and in the other, opposite axial direction for the other bearing component.

[0023] In any case, the combination of axle segments and their stop elements, as well as the screw, allows a preload to be applied to one or more bearing components through the resulting geometrically defined gap or interference. In this way, the preload on the bearing components can be easily adjusted simply by adjusting the engagement of the screw in the axle, i.e., by adjusting the resulting geometric conditions, in particular the defined gap or interference of the axle segments.

[0024] The bearing component can, for example, be one or more bearing inner rings, e.g., a bearing inner ring of a plain bearing or rolling bearing, a rolling bearing pair, or a paired rolling bearing, or a gear. Alternatively, more than one bearing component can be provided, whereby the two or more bearing components can comprise, for example, gears and / or bearing inner rings. The axle can also support a combination of bearing inner rings and gears, whereby each bearing component or each pair of bearing components can be supported with an individual axial preload.

[0025] Further advantages and advantageous embodiments are set forth in the description, the drawings, and the claims. In particular, the combinations of features set forth in the description and the drawings are purely exemplary, so the features may also be present individually or in other combinations.

[0026] The invention will be described in more detail below with reference to exemplary embodiments illustrated in the drawings. The exemplary embodiments and the combinations shown in the exemplary embodiments are purely exemplary and are not intended to define the scope of the invention. This scope is defined solely by the appended claims.

[0027] They show:

[0028] Fig. 1 : a schematic sectional view of an axis system for supporting a bearing component;

[0029] Fig. 2: a schematic sectional view of a further embodiment of the axle system of Fig. 1 for supporting and defined axial preloading of a paired bearing with a common outer ring;

[0030] Fig. 3: a schematic sectional view of a further embodiment of the axle system of Fig. 1 for supporting and defined axial preloading of several bearing components, in particular gears and rolling bearing pairs; and

[0031] Fig. 4: a perspective view of the embodiment of the axle of Fig. 3.

[0032] In the following, identical or functionally equivalent elements are identified by the same reference symbols.

[0033] Fig. 1 shows an axle system 1, also referred to as an axle below, for supporting bearing components 2, 4. A maximum axial preload is shown here as an example, as explained in more detail below. The bearing components 2, 4 can be, for example, two gears of a gear pair or two bearing inner rings of a double-row rolling or plain bearing. Alternatively, only one bearing component 2 can be provided, in which case the following description applies analogously.

[0034] The axle system 1 consists of a first axle segment 6 and a second axle segment 8. The two axle segments 6, 8 each have a through-bore 10, 12. In order to connect the two axle segments 6, 8 to one another, a screw 14 is arranged in this through-bore 10, 12. The screw 14, e.g. a fitting screw, has a stop surface 16 at one axial end, which bears against an end face 18 of the first axle segment 6. This stop surface 16, in cooperation with the end face 18, prevents the screw 14 from being fully inserted into the through-bore 10, 12. Furthermore, the stop surface 16 serves to press the two axle segments 6, 8 together. At the other axial end, opposite the stop surface 16, the screw 14 has an external thread 20 around its shaft.

[0035] The second axle segment 8 has an internal thread 22 in its through-bore 12, which interacts with the external thread 20 of the screw 14. The contact between the stop surface 16 and the end face 18 of the first axle segment 6 and the internal thread 22 of the second axle segment 8 makes it possible to preload the two axle segments 6, 8 using the screw 14. Additionally, the two axle segments 6, 8 can have alignment elements, e.g., projections and corresponding recesses, to align and connect the two axle segments 6, 8 with each other.

[0036] For example, the first axle segment 6 can have a cylindrical projection 24 at the axial end facing the second axle segment 8. The second axle segment 8, in turn, can have a corresponding recess 26 into which the projection 24 can engage.

[0037] The two axle segments 6, 8 can contact each other at the end faces 28, 30. Alternatively, a gap 32 can also be provided between the end faces 28, 30, which defines or determines the preload on the bearing components (2, 4) through the screw 14 and its engagement in the internal thread 22, together with the geometric position of the stop elements (36, 38) and the overall width of the bearing components (2, 4). In the same way, the gap 34 formed between the projection 24 and the recess 26 can define and determine the preload on the bearing components 2, 4 through the screw 14 and its engagement in the internal thread 22, analogous to the end faces, together with the position of the stop elements 36, 38 and the overall width of the bearing components 2, 4.

[0038] In practice, it should be determined which gap 32, 34 should be the leading gap for the preload. The other gap in each case must then be larger in order not to endanger / hinder the desired adjusting effect of the preload on the bearing components 2, 4. It is up to the situation which gap, either the gap 32 between the end faces or the gap 34 between the collar and recess, is used as the leading gap / excess for defining / adjusting the preload. The size of the leading gap of the two gaps 32, 34 serves to control the clamping of the two axis segments 6, 8 with one another. The other gap is then made correspondingly larger. The smaller the gap 32, 34, the more closely the two axis segments 6, 8 are clamped together and the higher the preload. Fig. 1 shows an example of a maximum axial preload.

[0039] The bearing component 2, 4, which is mounted on the axle 1, is held in its axial position between two stop elements 36, 38, which are respectively formed on the first and second axle segments 6, 8. The preload acting on one or both bearing components 2, 4 and exerted on the bearing component 2, 4 by the two stop elements 36, 38 is controlled by the guiding gap 32 or 34 between the first and second axle segments 6, 8. The smaller the gap 32 or 34, the greater the preload acting on the bearing component 2, 4 via the stop elements 36, 38. By bracing the two axle segments 6, 8, the pressure acting on the contact surface 40 between the two bearing components 2, 4 can thus also be controlled.

[0040] The axis 1 described here makes it possible to easily adjust and control the preload acting on the bearing components 2, 4. No additional screw-nut connections are required on the stop elements 36, 38 to axially secure the bearing components 2, 4. Furthermore, the bearing components 2, 4 do not need to be welded to the axis 1 and can therefore be easily disassembled and, for example, replaced if necessary.

[0041] The screw 14 not only clamps the two axle segments 6, 8 together, but also aligns the two axle segments 6, 8 with each other and coaxially aligns and clamps them with each other by the projection 24 and the corresponding recess 26.

[0042] As shown in Fig. 2, double-row bearing assemblies can also be mounted on the axle. As shown here, the two bearing components 2, 4 can be the inner rings of rolling bearings, illustrated here as tapered roller bearings. Alternatively, other bearing assemblies or plain bearings can also be mounted on the axle. The two tapered roller bearings each consist of the two inner rings 2, 4 and corresponding outer rings 42, 44. Tapered rollers 46, 48 are mounted between the inner rings 2, 4 and the outer rings 42, 44.

[0043] The two inner rings 2, 4 are arranged between the stop elements 36, 38 and are axially preloaded to increase or ensure the service life and rigidity of the bearing arrangement. This bearing pairing represents an example of a preloaded fixed bearing pairing in Fig. 2. If only one rolling bearing is mounted, the two stop elements 36, 38 would rest on the two axial sides of the inner ring 2 or the two axial sides of the inner ring 4.

[0044] As can be seen in Fig. 2, the through-bore of the two axle segments 6, 8 in the second axle segment 8 can also be designed as a blind bore. For example, as shown in Fig. 2, the axle 1 can be connected to another element 50, e.g., a needle bearing, here the loose bearing in the arrangement. However, it should be noted that this is only an example, and the axle can also be coupled to other elements.

[0045] Fig. 3 shows an axle 1 consisting of more than two axle segments 6, 8. As shown here as an example, not all axle segments need to have corresponding projections and recesses that can interlock. It is only necessary that each axle segment has a through-hole through which screw 14 can pass. Only the last axle segment 8, viewed in the axial direction, has an internal thread 22 into which the external thread 20 of screw 14 can engage.

[0046] 1 and 2, the axle 1 shown here has additional axle segments 52, 54. The first axle segment 52 represents a type of thickened washer that is positioned in front of the first axle segment 6. The screw 14 passes through the washer 52 and rests against the washer 52 with its contact surface 16. The washer 52 simultaneously represents a stop element that is in contact with a bearing component 58, which can be a gear, for example. Here, the gap between the thickened washer 52 and the stop element 36 shows, by way of example, the application of the maximum screw tensile stress, which also preloads the gear and fixes it on the axle segment 6 so that it cannot rotate against the stop element 36.

[0047] In Fig. 3, additional bearing components 2, 4, which have already been described above in connection with Figures 1 and 2 and can, for example, be two gears of a gear pair, as well as a bearing inner ring 60 and a bearing inner ring 66 of the axle 1, are mounted. The bearing inner ring 60 belongs to a tapered roller bearing, which consists of the bearing inner ring 60, a bearing outer ring 62, and tapered rollers 64 arranged therebetween. The second tapered roller bearing also consists of the bearing inner ring 66 and a corresponding bearing outer ring 68 and tapered rollers 70 arranged therebetween.

[0048] The axis system in Fig. 3 shows, as an example, a geometrically predefined preload between the two tapered roller bearings, applied through the two bearing inner rings 60, 66. The contact force of the screw 14 therefore closes the two gaps 82, 84. At the same time, a maximum axial preload, fixation, and anti-rotation protection of the bearing components 2, 4, and 58 is provided by the screw tensile stress through the visible gaps 86, 88.

[0049] Other bearing elements or other combinations of bearing elements are also possible and those described here should only be understood as an example to show the diverse application possibilities of individual preloads of different bearing elements in the axis system 1.

[0050] In the example of axle 1 shown here, the bearing element 58, e.g., a gear, is held in its axial position between the ring 52 as a stop element and the stop element 36 of the first axle segment 6. The stop element 36 simultaneously serves as a stop element for the bearing inner ring 60, which is held on its other side by the stop element 72 provided by the axle segment 54. The two bearing elements 2, 4 are then held in their axial position or preloaded by the stop elements 72 and 74.

[0051] The stop element 74 is formed by an intermediate element 56 which, as shown here by way of example, is not in direct contact with the through-bore, but is shaped as a ring around the axle segments 54, 8. The element 56 is also held in its axial position by the two axle segments 54, 8 and is thus both preloaded itself and used as a preload element for the bearing components 2, 4. The inner ring 66 of the second tapered roller bearing is in turn held in its axial position and preloaded by the stop element 74 of the intermediate element 56 and by the stop element 38 of the axle segment 8.

[0052] As can be seen in Fig. 3, the axle segments 6, 54, and 8 each have projections and recesses that can interlock. In the example shown here, only the recesses and projections 24 and 76 of the axle segment 6, 54 interlock. The projection 78 of the axle segment 54 does not engage with the recess 26 of the axle segment 8, but serves to support the intermediate element 56. In the example shown here, the recess 26 of the axle segment 8 has a support surface 80, which represents a tapered section of the axle segment 8. The intermediate element 56 can then rest on this support surface 80 and is coaxially centered.

[0053] As previously described in connection with Figures 1 and 2, in the embodiment shown here, the preload on the bearing elements 2, 4, 58, 60, 66 can also be controlled by screwing in or unscrewing the screw 14 and thus adjusting the individual gaps 82, 84, 86, 88. This is achieved by the gaps formed between the individual axle segments 52, 6, 54, 56, 8, the size of which can be adjusted depending on the required preload on the bearing elements 2, 4, 58, 60, 66.

[0054] The axis system shown here makes it possible to mount bearing components on a single axis in a space-saving and interchangeable manner, as well as to secure the bearing components in their axial position. Furthermore, it is possible to apply a defined preload to the bearing components.

[0055] List of reference symbols

[0056] 1 modular axis system

[0057] 2 bearing component

[0058] 4 Bearing component

[0059] 6 first axis segment

[0060] 8 second axis segment

[0061] 10 through hole

[0062] 12 through holes

[0063] 14 Screw

[0064] 16 Stop surface

[0065] 18 Frontal surface

[0066] 20 external threads

[0067] 22 internal threads

[0068] 24 Overhang

[0069] 26 recess

[0070] 28 Frontal area

[0071] 30 frontal area

[0072] 32 gap

[0073] 34 gap

[0074] 36 stop element

[0075] 38 Stop element

[0076] 40 contact area

[0077] 42 Outer ring

[0078] 44 Outer ring

[0079] 46 tapered roller

[0080] 48 tapered roller gear

[0081] Axle segment Axle segment Intermediate element Bearing element Bearing inner ring Bearing outer ring Tapered rollers Bearing inner ring Bearing outer ring Tapered rollers Stop element Stop element Recess Projection Support surface Gap Gap Gap Gap

Claims

Patent claims Modular axis system for supporting at least one bearing component 1. Modular axle system (1) for supporting at least one bearing component (2, 4), wherein the at least one bearing component (2, 4) is arranged circumferentially around the axle system (1), characterized in that the axle system (1) consists of at least two axle segments (6, 8) which are arranged one behind the other in the axial direction, wherein at least one of the two axle segments (6) has an axial through-bore (10) and wherein the other of the two axle segments (8) has an axial blind hole or an axial through-bore (12), wherein the at least two axle segments (6, 8) are coupled to one another by means of a screw (14) which is arranged in the axial through-bore (10) and the axial blind hole or the axial through-bore (12), wherein each of the at least two axle segments (6, 8) has a circumferentially arranged stop element (36, 38), wherein the at least one Bearing component (2, 4) is arranged between the stop elements (36, 38),and wherein the screw (14) is designed to exert a preload on the at least one bearing component (2, 4) via the stop elements (36, 38).

2. Modular axle system according to claim 1, wherein the screw (14) has a stop surface (16) at one axial end, which abuts against a first end face (18) of the first axle segment (6), wherein the screw (14) has an external thread (20) at least at the other axial end, and wherein the blind hole or the Through hole (12) in the second axis segment (8) has an internal thread (22) into which the external thread (20) of the screw (14) engages.

3. Modular axis system according to claim 1 or 2, wherein the first and second axis segments (6, 8) have corresponding alignment elements (24, 26) in order to align the two axis segments (6, 8) coaxially with each other.

4. Modular axle system according to claim 3, wherein the alignment elements (24, 26) comprise an axially directed, cylinder jacket-shaped projection (24) arranged on an end face of one of the axle segments (6, 8) and a corresponding recess (26) arranged on an end face of the other axle segment (6, 8), wherein the projection (24) is designed to engage in the recess (26).

5. Modular axle system according to claim 3, wherein the second axial end face of the first axle segment (6) and the first axial end face of the second axle segment (8) are arranged with a gap (32) or a geometric excess relative to one another, wherein the screw (14) is designed to adapt a defined preload force acting on the at least one bearing component (2, 4) by adapting the tensile stress generated by the screw (14).

6. Modular axis system according to one of claims 3 or 4, wherein the axis system (1) has further axis segments (52, 54, 56), wherein two adjacently arranged axis segments (6, 8, 52, 54, 56) each have corresponding projections (24, 78) and recesses (76, 80) which engage with one another and are designed to center the axis segments coaxially with respect to one another.

7. Modular axle system according to claim 5, wherein the further axle segments (52, 54, 56) have further circumferential stop elements (72, 74) for the at least one bearing component (2, 4) or further bearing components (58, 60, 65).

8. Modular axle system according to one of the preceding claims, wherein the at least one bearing component (2, 4) is one or two bearing inner rings.

9. Modular axle system according to one of the preceding claims, wherein the axle system (1) is designed to comprise two or more bearing components (2, 4, 58, 60, 65), whereby each bearing component or pair of bearing components can be supported with an individual axial preload.

10. Modular axle system according to claim 8, wherein the two or more bearing components (2, 4, 58, 60, 65) comprise gears and / or bearing inner rings.

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