Bearing assembly comprising a shaft, a housing part and a bearing, and gearing comprising a bearing assembly

Abstract

A bearing assembly comprising a shaft, a housing part and a bearing; and a gearing comprising a bearing, wherein: an outer ring of the bearing is accommodated in a bore of the housing part; an inner ring of the bearing is fitted onto the shaft; a washer stack axially delimits the ring; and the washer stack has one or more shim washers and a first holding ring.

Description

[0001] Bearing arrangement comprising a shaft, a housing part and a bearing, and gearbox with bearing arrangement

[0002] Description:

[0003] The invention relates to a bearing arrangement comprising a shaft, a housing part and a bearing, and to a transmission with a bearing arrangement.

[0004] It is generally known that shims are used to compensate for tolerances that arise during manufacturing.

[0005] From DE 10 2021 003 240 A1, a method for producing a transmission is known as the closest prior art.

[0006] From DE 1 298 545 A an electromechanical analog-digital converter with a planetary gear arranged between coding discs is known.

[0007] A rotary piston engine is known from EP 3 960 984 A1.

[0008] A gearbox with a housing is known from DE 10 2021 004 971 A1.

[0009] The invention is therefore based on the object of developing a transmission which is intended to achieve a robust compensation of manufacturing-related tolerances during operation of the transmission and a long service life.

[0010] According to the invention, the object is achieved in the bearing arrangement according to the features specified in claim 1 and in the transmission according to the features specified in claim 15.

[0011] Important features of the invention in the bearing arrangement, comprising a shaft, a housing part and a bearing, are that a first ring, in particular an outer ring, of the bearing is received in a bore of the housing part, wherein a second ring, in particular an inner ring, of the bearing is placed on the shaft, wherein a disk pack axially delimits the first or second ring, in particular inner ring or outer ring, wherein the disk pack has a first retaining ring and one or more shims, wherein the first retaining ring is secured against rotation in the circumferential direction in a rotationally fixed or positively locking manner.

[0012] The advantage here is that even under changing, particularly flexing, transverse forces, the disc pack remains robust and thus ensures the axial limitation of the bearing as intended. In addition, the retaining rings bridge interruptions in the contact surface, in particular grooves that run through the contact surface. The shims are very thin and would not permanently fulfill their intended function of axial spacing if the contact surface were interrupted or would even fail. However, because the retaining rings protect the shims and thus the shims are in continuous contact with the retaining rings, the service life of the shims is increased and can be described as fatigue-resistant. Shims working into grooves that interrupt the contact surface of the shims is thus prevented because these grooves, i.e. interruptions in the contact surface, are bridged by the retaining rings.

[0013] In particular, the anti-twist device prevents the disc pack from wandering around in the event of fluctuating transverse forces, thus ensuring a long service life.

[0014] In particular, the axial direction is always aligned parallel to the direction of the axis of rotation of the shaft, in particular with the circumferential direction and the radial direction being related to the axis of rotation of the shaft.

[0015] In an advantageous embodiment, the first retaining ring is rotationally fixed or positively secured against rotation in the circumferential direction by axially through holes being formed in the respective retaining ring, in particular which are arranged radially outside the shims, wherein connecting elements, in particular pins, in particular grooved pins, protrude through the holes, wherein the connecting elements protrude into axial bores, in particular wherein the axial bores are introduced into a centering collar of a cover part or into a shaft collar of the shaft, in particular wherein the holes are radially spaced from the shims, in particular wherein the holes are spaced from one another in the circumferential direction, in particular evenly, and / or are arranged at the same radial distance.The advantage here is that a simple anti-twist protection is achieved and thus a long service life, since migration out or in, especially in the case of fluctuating transverse force loads, is prevented.

[0016] In an advantageous embodiment, the first retaining ring is rotationally fixed in the circumferential direction or is positively secured against rotation by additionally or alternatively at least the first retaining ring, in particular on its radial outer circumference, having at least one radially directed elevation which projects into a, in particular corresponding, radially directed recess, in particular groove, in particular axial groove, of the housing part, in particular wherein the area covered in the axial direction by the radially directed recess comprises the area covered in the axial direction by the disk pack. The advantage here is that a rotation lock can be achieved with only minimal effort, i.e. the shaping of the retaining ring and a first axial groove in the housing part.

[0017] However, if the first and second retaining rings of the disc pack are of identical design, an additional axial groove must be provided in the housing part, which has a circumferential angular distance from the first axial groove that corresponds to the angle of rotation of the bayonet lock. In an advantageous embodiment, adhesive is arranged in or on the disc pack, particularly to prevent rotation of the disc pack and / or the shims. The advantage here is that such a rotation lock can be implemented in a simple and cost-effective manner.

[0018] In an advantageous embodiment, the first retaining ring has a greater axial wall thickness, in particular thickness, than each of the shims. This is advantageous in that the shim assembly has greater rigidity than a single shim assembly. Thus, the shims are arranged in a protected manner, and the shim assembly can even be supported on a contact surface interrupted in the circumferential direction. The interruption is created, for example, by a groove that is bridged by the shim assembly.

[0019] In an advantageous embodiment, the disk assembly comprises a second retaining ring that is positively connected to the first retaining ring, in particular by means of a bayonet connection. In particular, the second retaining ring has a greater axial wall thickness, in particular thickness, than each of the shims, in particular, the shims are arranged axially between the two retaining rings. This provides the advantage of a quick and easy-to-implement connection for protectively accommodating the shims in the disk assembly.

[0020] In an advantageous embodiment, the first retaining ring is of the same construction, in particular identical, to the second retaining ring. The advantage here is that only a small number of additional parts are required, in particular only one retaining ring. By rotating one of two previously parallel aligned retaining rings by 180° and incorporating the shims, a disc pack can be produced which, depending on the number of shims accommodated, has a different number of shims with a corresponding axial width. In an advantageous embodiment, the radial spacing area covered by the respective retaining ring comprises the radial spacing area covered by the shims. The advantage here is that the shims can be arranged inside the disc pack and are thus protectively surrounded by the retaining rings. In addition, the axially projecting spring areas prevent the shims from radially migrating out.

[0021] In an advantageous embodiment, each of the retaining rings has, on its radially inner edge region, axially projecting, in particular circumferentially extending, spring regions, in particular tongue-shaped spring regions, in particular wherein the spring regions are connected at their respective front or rear end in the circumferential direction to the remaining respective holding region, wherein the spring regions of the first retaining ring are spaced apart from one another in the circumferential direction, wherein the spring regions of the second retaining ring are spaced apart from one another in the circumferential direction, wherein spring regions of the first retaining ring axially engage behind spring regions of the second retaining ring,In particular, the respective spring region of the first retaining ring protrudes in the axial direction and has a nose region protruding counter to the axial direction, and / or the respective spring region of the second retaining ring protrudes counter to the axial direction and has a nose region protruding in the axial direction, in particular, the spring regions are each arranged at the same radial distance and / or are evenly spaced from one another in the circumferential direction. The advantage here is that the two retaining rings can be connected to one another by means of their spring regions, thus forming a disc assembly that encompasses the shims. In this way, the shims are connected in a protected manner by the two interconnected retaining rings. The contact surface of the respective shim on the respective retaining ring is continuous in the circumferential direction, thus preventing failure of the respective shim.

[0022] In an advantageous embodiment, the spring regions are arranged radially within the radial spacing area covered by the shims. This prevents the shims from drifting out or moving radially, as the spring regions act as a radial boundary in the axial area covered by the shims. This is because the spring regions are arranged radially within the shims, and the area covered by the spring regions in the axial direction encompasses the area covered by the shims in the axial direction.

[0023] The axial direction is aligned parallel to the direction of the shaft's axis of rotation and the radial direction and the circumferential direction are related to the direction of the shaft's axis of rotation.

[0024] In an advantageous embodiment, the area covered in the axial direction by the first retaining ring overlaps with the area covered in the axial direction by the second retaining ring. This is advantageous because the two retaining rings are connected to each other, thus forming a securely connected disc pack.

[0025] In an advantageous embodiment, the two retaining rings are arranged 180° apart. This has the advantage that only a single type of retaining ring needs to be manufactured and stocked.

[0026] In an advantageous embodiment, the ring comprises the outer ring, wherein the bearing arrangement has a cover part which has a centering collar which projects into the bore of the housing part, wherein the disk pack is arranged axially between the cover part, in particular between the centering collar of the cover part, and the outer ring, in particular wherein at least one of the retaining rings has a radially outwardly projecting elevation which projects into an axial groove of the housing part, in particular into an axial groove of the housing part arranged on the bore. It is advantageous in this case that the disk pack is axially delimited by the cover part and is thus fixed between the outer ring and the cover part. The cover part, with its centering collar projecting into the bore, defines an axial position against which the disk pack rests.Since this position can vary depending on the manufacturing process, the axial width of the shim pack can be compensated by selecting the number and axial thickness of the shims, so that the outer ring of the bearing can be limited to the intended axial position.

[0027] In an advantageous embodiment, the ring is the inner ring, with the disk assembly being arranged axially between a shaft collar of the shaft and the inner ring of the bearing, in particular with at least one of the retaining rings having a radially inwardly projecting elevation which projects into an axial groove of the shaft. The advantage here is that the axial position of the shaft collar is different, and thus the axial position intended for the inner ring is made possible by selecting the number and axial thickness of the shims. Furthermore, a positive-locking anti-rotation feature can be achieved simply by shaping and creating the axial groove.

[0028] In an advantageous embodiment, the area covered by the axial groove in the axial direction encompasses the area covered by the disk pack in the axial direction. This is advantageous because the anti-rotation lock is easily implemented.

[0029] In an advantageous embodiment, adhesive is arranged in or on the pane stack. This is advantageous because it provides additional security.

[0030] In an advantageous embodiment, the shims are designed as perforated shims, in particular wherein the axial thickness of the shims is smaller than the axial thickness of the retaining rings. The advantage here is that the retaining rings stiffen the disc package and thus also enable interruptions formed in the circumferential direction in the respective contact surface of the respective retaining ring on the side facing away from the shims to be bridged. In an advantageous embodiment, axially through holes are formed in the respective retaining ring, in particular which are arranged radially outside the shims, wherein connecting elements, in particular pins, protrude through the holes, wherein the connecting elements protrude into axial bores, in particular wherein the holes are in particular evenly spaced from one another in the circumferential direction and / or are arranged at the same radial distance.The advantage here is that anti-twist protection can be achieved using pins in a simple and cost-effective manner.

[0031] In an advantageous embodiment, the ring is the outer ring, with the axial bores arranged in the cover part, in particular with the axial bores arranged as blind holes. This is advantageous because the anti-rotation device can be anchored in the cover part. Thus, no drilling is required in the bearing, especially in the outer ring. The cover part is connected to the housing part accommodating the bearing by means of axially directed connecting screws, thus ensuring a secure connection against rotation.

[0032] In an advantageous embodiment, the ring is the inner ring, with the axial bores being introduced into the shaft, particularly into the shaft collar, particularly as blind holes. It is advantageous that the shaft collar has a sufficient material thickness to accommodate the bores. This enables a very compact design.

[0033] Important features of the gearbox with a bearing arrangement as mentioned above are that the shaft is connected in a rotationally fixed manner to a toothed part.

[0034] It is advantageous that the shaft is a transmission shaft, in particular an input shaft, an intermediate shaft, or an output shaft. The shaft is arranged at the axial end facing the cover part, protected from the environment by the cover part. Further advantages arise from the subclaims. The invention is not limited to the combination of features of the claims. Those skilled in the art will recognize further useful combinations of claims and / or individual claim features and / or features of the description and / or the figures, in particular from the task and / or the task posed by comparison with the prior art.

[0035] The invention will now be explained in more detail using schematic illustrations:

[0036] Figure 1 shows a sectioned bearing arrangement of a transmission according to the invention in an oblique view, wherein a disk pack 1 is arranged on a bearing of the transmission.

[0037] Figure 2 shows a retaining ring 20 of the disc pack 1 in an oblique view.

[0038] In Figure 3, two such retaining rings 20 are shown in an oblique view.

[0039] In Figure 4, the disk pack is shown exploded in an oblique view, with a region of the exploded disk pack schematically and enlarged.

[0040] Figure 5 shows an oblique view of an area of ​​the disc pack 1 before assembly.

[0041] Figure 6 shows an oblique view of a portion of the disc pack 1 after assembly.

[0042] As shown in the figures, a bearing for rotatably supporting a shaft 7 is accommodated in the housing part 3. In particular, the outer ring 4 of the bearing is accommodated in a through bore of the housing part 3, and the inner ring 6 is placed on the shaft 7. Rolling elements 5 are arranged between the inner ring 6 and the outer ring 4.

[0043] The inner ring 6 rests on a step of the shaft 7 and is thus axially limited relative to the shaft 7.

[0044] A cover part 2 covers the bore from the environment and, for this purpose, rests against the housing part 3. In particular, screws passing through the cover part 2, whose threaded portions are screwed into threaded holes in the housing part 3, press the cover part 2 toward the housing part 3 with their screw heads. A centering collar of the cover part 2 projects into the bore. The outer ring 4 is axially delimited by a disk pack 1 arranged axially between the outer ring 4 of the bearing and the cover part 2.

[0045] The axial limitation is determined by the axial thickness of the disc pack 1.

[0046] As shown in Figures 2 to 6, the disc pack 1 has shims 40 which are axially held on both sides by retaining rings 20 which can be connected to one another.

[0047] The shims 40 are designed as perforated discs and all have the same outer diameter and the same clear inner diameter. The axial thickness, in particular the wall thickness, of the shims 40 may be the same or different. Preferably, the thickness is selected to be in the range of one-tenth to five-tenths of a millimeter, i.e., 0.1 mm to 0.5 mm.

[0048] As shown in Figure 4, several shims are arranged axially between the two retaining rings 20, so that the outer ring is axially limited depending on the number and the axial thickness of the shims 20.

[0049] The retaining rings 40 preferably have a greater axial thickness than the shims. Thus, the retaining rings 40 are more stable and / or stiffer than the shims 20.

[0050] The retaining rings 40 have a smaller inner diameter than the shims 40.

[0051] The retaining rings 40 have a larger outer diameter than the shims 40.

[0052] Preferably, at a greater radial distance than the largest radial distance of the shims 40, the retaining rings 40 have circumferentially spaced, axially continuous holes 22 through which grooved pins 8 are passed, which project into axial bores of the cover part 2 and through the holes of the two retaining rings 40 of the disc pack 1. Thus, the disc pack 1 is secured against rotation relative to the cover part 2. The two retaining rings 20 of the disc pack 1 are structurally identical, in particular identical to one another, although they are arranged in the disc pack 1 rotated by 180° relative to one another.

[0053] Each retaining ring 20 has circumferentially spaced spring regions 21 on its radial inner edge region. The respective spring region is designed as a bending region and extends more in the circumferential direction than in the axial direction.

[0054] The respective spring region 21 is shaped as a tongue extending in the circumferential direction, which protrudes slightly axially on the retaining ring 20.

[0055] The first spring region 21 of a first retaining ring 40 is thus elastically deflectable in the axial direction when a second spring region 21 of the second retaining ring 40 is pushed circumferentially behind the first spring region 21. Thus, the second spring region 21 of the second retaining ring 20 then engages under the first spring region 21 of the first retaining ring 20.

[0056] To improve threading during this under-gripping, each spring area 21 has an insertion bevel.

[0057] This positive connection, which is brought about by relative rotation of the two retaining rings 40, can also be referred to as a bayonet connection, in particular wherein the first retaining ring 40 functions as the first bayonet closure part and the second retaining ring 40 functions as the second bayonet closure part.

[0058] In particular, the respective spring region 21 is formed and shaped by punching and bending. In particular, the spring region 21 is formed integrally with the remaining retaining ring 40, i.e., in one piece and / or in one piece.

[0059] Due to this mutual engagement of the spring regions 21 of the two retaining rings 40, the shims 20 arranged between the retaining rings 40 are axially limited and enclosed in a form-giving manner. Bending of individual shims 20 is impossible. Furthermore, the shims 20 fit together seamlessly, particularly in the circumferential direction.

[0060] A radial migration of the shims is prevented due to the respective spring areas 21, which are arranged distributed around the circumference and project axially towards the respective other retaining ring.

[0061] The first retaining ring 40 rests against the outer ring of the bearing, and the second retaining ring 40 rests against the cover part 2. However, the contact surface of the second retaining ring 40 on the cover part 2 is not continuous in the circumferential direction, but rather interrupted, so that the bearing is well supplied with oil and the heated oil on the inside of the cover part 2 releases heat, in particular for dissipation from the cover part 2 to the environment.

[0062] Since the second retaining ring 40 has a sufficient wall thickness, it bridges the interruption and thus ensures a stable alignment of the disc pack 1 and a constant axial positioning even under load.

[0063] The disc package 1 can be manufactured pre-assembled. This allows it to be moved, stored, and transported as a single unit.

[0064] In further embodiments according to the invention, in addition to or as an alternative to the grooved pins 8, a positive-locking anti-twist device is provided, which is effected by at least one radial elevation of a retaining ring 20, which projects into a corresponding recess, in particular groove, of the housing part 3.

[0065] Preferably, the groove is designed as an axial groove on the inside of the bearing bore, i.e. the bore of the housing part that accommodates the outer ring of the bearing.

[0066] The area covered by the groove in the axial direction includes the area covered by the disc pack 1 in the axial direction.

[0067] The radial elevation can be effected, for example, by a radially projecting nose region of the retaining ring 20. In further embodiments according to the invention, additionally or alternatively

[0068] Adhesive provided in and / or on the disc package 1, in particular as an anti-twist device.

[0069] In further embodiments according to the invention, other connecting elements, such as screws, rivets, clamping sleeves or pins different from the grooved pins 8, are used instead of the grooved pins 8.

[0070] In further embodiments according to the invention, the disk pack 1 is placed onto the shaft, wherein the disk pack 1 is arranged axially between the inner ring of the bearing and the shaft shoulder of the shaft. Thus, the axial position at which the inner ring is limited is defined by means of the disk pack 1. For positive rotational security, the grooved pins 8 are inserted into axial bores which are introduced into the shaft at the shaft shoulder, and / or at least one of the two retaining rings 40 has a radially inwardly directed elevation, in particular a nose region projecting radially inward, wherein this elevation, in particular this nose region, projects into an axial groove in the shaft.

[0071] In further embodiments according to the invention, the disk assembly 1 is equipped with only a single retaining ring, so that the shims 40 rest axially between the cover part 2 and the retaining ring 20, which in turn rests against the outer ring 4. Alternatively, however, the retaining ring can also be placed against the cover part to bridge a groove in the contact surface, and the shims are accommodated in the retaining ring 20. The outer ring 4 then rests against one of the shims. In both alternatives, pins and / or radial elevations can be additionally provided in the manner described above to prevent rotation.

[0072] List of reference symbols

[0073] 1 disc package 2 cover part

[0074] 3 Housing part, in particular bearing flange or bearing shield

[0075] 4 Outer ring

[0076] 5 rolling elements

[0077] 6 Inner ring 7 Shaft

[0078] 8 grooved pin

[0079] 20 retaining ring

[0080] 21 Spring area

[0081] 22 through hole 40 shim

Claims

Patent claims:

1. Bearing arrangement, comprising a shaft, a housing part and a bearing, wherein a first ring, in particular an outer ring, of the bearing is received in a bore of the housing part, wherein a second ring, in particular an inner ring, of the bearing is placed on the shaft, characterized in that a disk pack axially delimits the first or second ring, in particular the inner ring or outer ring, wherein the disk pack has a first retaining ring and one or more shims, wherein the first retaining ring is rotationally fixed or positively secured against rotation in the circumferential direction, in particular wherein the axial direction is aligned parallel to the direction of the axis of rotation of the shaft, in particular wherein the circumferential direction and the radial direction are related to the axis of rotation of the shaft.

2. Bearing arrangement according to claim 1, characterized in that the first retaining ring is secured against rotation in the circumferential direction or is secured against rotation by means of a form-fitting connection in that axially through holes are formed in the respective retaining ring, in particular which are arranged radially outside the shims, wherein connecting elements, in particular pins, in particular grooved pins, protrude through the holes, wherein the connecting elements protrude into axial bores, in particular wherein the axial bores are introduced into a centering collar of a cover part or into a shaft collar of the shaft, in particular wherein the holes are radially spaced from the shims, in particular wherein the holes are spaced from one another in the circumferential direction, in particular evenly, and / or are arranged at the same radial distance.

3. Bearing arrangement according to claim 1 or 2, characterized in that the first retaining ring is secured against rotation in the circumferential direction or is secured against rotation by means of a form-fitting connection, in that additionally or alternatively at least the first retaining ring, in particular on its radial outer circumference, has at least one radially directed elevation which projects into a, in particular corresponding, radially directed depression, in particular groove, in particular axial groove, of the housing part, in particular wherein the area covered in the axial direction by the radially directed depression comprises the area covered in the axial direction by the disk pack.

4. Bearing arrangement according to one of the preceding claims, characterized in that adhesive is arranged in or on the disc pack, in particular for securing the disc pack and / or the shims against rotation.

5. Bearing arrangement according to one of the preceding claims, characterized in that the disk pack has a second retaining ring which is positively connected to the first retaining ring, in particular by means of a bayonet connection, in particular wherein the second retaining ring has a greater axial wall thickness, in particular thickness, than each of the shims, in particular wherein the shims are arranged axially between the two retaining rings and / or wherein the area covered by the shims in the axial direction is encompassed by the area covered by the first retaining ring and / or by the second retaining ring in the axial direction, in particular wherein the radial spacing area covered by the shims is encompassed by the radial spacing area covered by the first retaining ring and / or by the second retaining ring.

6. Bearing arrangement according to one of the preceding claims, characterized in that the first retaining ring has a greater axial wall thickness, in particular thickness, than each of the shims, and / or that the first retaining ring is of the same construction, in particular identical, to the second retaining ring, and / or that the radial spacing area covered by the respective retaining ring comprises the radial spacing area covered by the shims.

7. Bearing arrangement according to one of the preceding claims, characterized in that each of the retaining rings has, on its radially inner edge region, axially projecting, in particular circumferentially extending, spring regions, in particular tongue-shaped spring regions, in particular wherein the spring regions are connected at their respective front or rear end in the circumferential direction to the remaining respective holding region, wherein the spring regions of the first retaining ring are spaced from one another in the circumferential direction, wherein the spring regions of the second retaining ring are spaced from one another in the circumferential direction, wherein spring regions of the first retaining ring axially engage behind spring regions of the second retaining ring,in particular, wherein the respective spring region of the first retaining ring protrudes in the axial direction and has a nose region protruding counter to the axial direction and / or wherein the respective spring region of the second retaining ring protrudes counter to the axial direction and has a nose region protruding in the axial direction, in particular, wherein the spring regions are each arranged at the same radial distance and / or are evenly spaced from one another in the circumferential direction.

8. Bearing arrangement according to one of the preceding claims, characterized in that the spring regions are arranged radially within the radial spacing region covered by the shims.

9. Bearing arrangement according to one of the preceding claims, characterized in that the area covered by the first retaining ring in the axial direction overlaps with the area covered by the second retaining ring in the axial direction and / or that the two retaining rings are arranged rotated by 180° with respect to one another.

10. Bearing arrangement according to one of the preceding claims, characterized in that the ring is the outer ring, wherein the bearing arrangement has a cover part which has a centering collar which projects into the bore of the housing part, wherein the disc pack is arranged axially between the cover part, in particular between the centering collar of the cover part, and the outer ring, in particular - wherein the contact surface between the cover part, in particular the centering collar, and the disc pack is interrupted in the circumferential direction, in particular by a radially continuous groove, in particular for supplying lubrication to the bearing, the cover part, and / or wherein at least one of the retaining rings has a radially outwardly projecting elevation which projects into an axial groove of the housing part, in particular into an axial groove of the housing part arranged on the bore.

11. Bearing arrangement according to one of the preceding claims, characterized in that the ring is the inner ring, wherein the disc pack is arranged axially between a shaft collar of the shaft and the inner ring of the bearing, in particular wherein at least one of the retaining rings has a radially inwardly projecting elevation which projects into an axial groove of the shaft.

12. Bearing arrangement according to one of the preceding claims, characterized in that the area covered by the axial groove in the axial direction comprises the area covered by the disc pack in the axial direction.

13. Bearing arrangement according to one of the preceding claims, characterized in that the shims are designed as perforated discs, in particular wherein the axial thickness of the shims is smaller than the axial thickness of the retaining rings.

14. Bearing arrangement according to one of the preceding claims, characterized in that the ring is the outer ring, wherein the axial bores are arranged in the cover part, in particular wherein the axial bores are arranged as blind holes, or that the ring is the inner ring, wherein the axial bores are introduced into the shaft, in particular into the shaft collar of the shaft, in particular as blind holes.

15. Gearbox with bearing arrangement according to one of the preceding claims, characterized in that the shaft is connected to a toothed part in a rotationally fixed manner.

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