Rotation sensor for a steering system of a motor vehicle

Abstract

The present invention relates to a stator (52) of a rotation sensor (5) for a steering system (1) of a motor vehicle, comprising two stator elements (6) which extend coaxially around an axis (L) in a ring shape and are fixed to a carrier element (7), said stator elements having axially spaced-apart connecting flanges (61), from which tooth elements (62) extend axially opposite one another and are distributed over the circumference, said tooth elements being arranged in the circumferential direction between the tooth elements (62) of the respective other stator element (6), wherein a stator element (6) has at least one stator form-locking element (63, 64, 65, 66) which is positively connected to a corresponding carrier form-locking element (71, 72, 73, 74, 75) of the carrier element (7).In order to optimise the fixing of the stator elements and to enable improved production and assembly, the invention proposes that a carrier form-locking element (71, 72, 73, 74, 75) protrudes radially outwards from the carrier element (7) and engages radially from the inside into a stator form-locking element (63, 64, 65, 66), or a stator form-locking element (63, 64, 65, 66) protrudes radially inwards from the stator element (6) and engages radially from the outside into a carrier form-locking element (71, 72, 73, 74, 75).

Description

State of the art

[0001] The invention relates to a stator of a rotation sensor for a steering system of a motor vehicle, comprising two stator elements which are fixed to a carrier element and which extend coaxially around an axis in a ring shape and have axially spaced connection flanges, from which tooth elements extend which are axially directed towards one another and distributed over the circumference and which are arranged in the circumferential direction between the tooth elements of the respective other stator element, wherein a stator element has at least one stator form-locking element which is positively connected to a corresponding carrier form-locking element of the carrier element.

[0002] To detect a manual steering command initiated by rotating a steering shaft, a motor vehicle steering system includes a rotation sensor comprising a magnetic element mounted on the steering shaft, which is surrounded by a stator coaxially to the axis of rotation. The stator comprises annular stator elements that can detect the magnetic field with angular resolution and transmit it to an electrical magnetic sensor. This allows a relative rotation of the magnetic element to be detected.

[0003] To measure the manual torque applied to the steering shaft in an electromechanical power steering system or a steer-by-wire steering system, the magnetic element is attached to a first steering shaft section, which is connected via an elastic, torque-dependent torsion bar to a second steering shaft section to which the stator is fixed. This creates the torque sensor.

[0004] The stator comprises two stator elements made of a magnetically conductive material, typically a ferrous material, which are mounted on a non-magnetic support element, which is typically made of plastic. Such arrangements are described in the prior art, for example, in DE 10 2012 024 383 A1 or DE 10 2017 118 456 B4.

[0005] In the known stator design, a stator element has an annular disk-shaped connecting flange with a coaxial through-hole, from which toothed elements extend axially distributed over the circumference. The two similarly constructed stator elements are fixed to the two axial end faces of the support element in such a way that the connecting flanges are axially spaced and the toothed elements of one stator element engage claw-like between the toothed elements of the other stator element.

[0006] In order to fix the stator elements to the carrier element in a positionally accurate manner, it is known from the aforementioned prior art to provide corresponding carrier form-locking elements and stator form-locking elements on the carrier element and the stator elements, which can each be brought into form-locking engagement by axially plugging on a stator element and which can then be fixed by rivets or the like.

[0007] In the cited prior art, it is proposed that axially protruding pins or studs be formed on the end face of the support element, which, when plugged in, are inserted axially through corresponding openings in the stator element, in other words, are threaded axially. While this enables precise relative orientation of the stator elements and support element, it is disadvantageous that tight positional tolerances must be maintained during assembly, and the axial pins and openings must be designed with relatively small dimensions due to the limited installation space. This makes manufacturing and assembly complex and also limits the load-bearing capacity of the connection.

[0008] A stator of the type mentioned above is known from DE 10 2012 011 876 A1. Stator positive locking elements are arranged on the toothed elements. The problem is that the toothed elements can be deformed during production and operation, which can impair function. Similar designs are known from US 2018 / 0 339 729 A1 or US 2020 / 0 059 138 A1.

[0009] In view of the problems explained above, it is an object of the present invention to optimize the fixing of the stator elements in a stator of the type mentioned at the outset and to enable improved production and assembly. Description of the invention

[0010] This object is achieved according to the invention by the structure having the features of claim 1. Advantageous further developments emerge from the subclaims.

[0011] In a stator of a rotation sensor for a steering system of a motor vehicle, comprising two stator elements which are fixed to a carrier element and which extend coaxially in a ring around an axis and have axially spaced-apart connecting flanges, from which tooth elements extend which are axially directed towards one another and distributed over the circumference and which are arranged in the circumferential direction between the tooth elements of the respective other stator element, wherein a stator element in each case has at least one stator form-locking element which is positively connected to a corresponding carrier form-locking element of the carrier element, it is provided according to the invention that a carrier form-locking element and / or the stator form-locking element have at least one latching element which can be brought into latching engagement with the stator element or the carrier element in the axial direction, which latching element has a form-locking effective in the axial direction.

[0012] A locking element can enable a locking engagement to create a positive locking connection between the stator element and the support element in the axial direction. The locking element can comprise locking hooks, lugs, pins, clips, or the like, as well as correspondingly designed locking receptacles, such as a locking recess or an undercut. However, the locking element can also have a self-cutting, sharp edge that digs into the (originally smooth) mating surface like a barb, thus creating the positive locking recess in the mating surface only during the joining process through plastic deformation.

[0013] The locking element is designed so that when the stator element and carrier element are axially connected in a defined axial mounting position, it snaps elastically into an axially effective positive connection, or creates an axially effective positive connection by plastic deformation.

[0014] A locking element can be used to create a positive connection simply by mechanically positioning the stator element on the carrier element until a locking engagement is created.

[0015] A locking element can preferably be designed in a barb-shaped manner, so that the stator element and carrier element can be easily assembled in the axial direction until they snap into place. In the engaged state, an undercut area of the locking element is supported against the direction of assembly, creating a positive connection effective in the axial direction, which secures the stator element to the carrier element.

[0016] It is advantageous for the locking element to be elastic. It can preferably be resilient in the radial direction or in the circumferential direction in order to move the locking element in the radial direction into a positive engagement which is effective in the axial direction. It can preferably be formed integrally with the stator element and / or the carrier element, for example comprising a projecting, elastically bendable tongue, an elastically deformable pin, projection, finger or the like. When the stator element is placed axially on the carrier element, the locking element can be elastically spread open or closed transversely to the axis, i.e. transversely to the axial mounting direction, until, upon reaching the final mounting position, it is brought into positive engagement with the carrier element by the elastic force, for example snapping into a recess or behind a projection of the carrier element radially or in the circumferential direction.

[0017] An advantageous development can provide for the locking element to have a fixing claw. A fixing claw forms a deformation element made of a harder material that can dig plastically into a softer material. It forms a self-forming locking element that, when connected by being plugged in the axial direction, automatically forms a corresponding locking recess, for example, a radially or circumferentially introduced recess, in which it then sits with a positive fit, thereby forming a positive connection acting counter to this direction. The deformation element can have one or more protruding sharp edges, teeth, or spikes, which are preferably arranged in a barb-like manner.

[0018] Preferably, a fixing claw can be formed on the metallic stator element. When plugged in, this claw can dig into the softer plastic support element in a form-fitting manner, undergoing plastic deformation, and create a positive locking effect in the axial direction.

[0019] It is possible for the locking element to be engageable in the axial direction. An elastic locking element can snap into the positive locking engagement, preferably in the radial or circumferential direction, when the stator element and carrier element are axially connected. A locking element with a fixing claw creates the locking engagement through plastic deformation.

[0020] The invention further relates to a rotary sensor comprising a magnetic element arranged to rotate about an axis and surrounded by a stator, wherein the stator is designed according to one of the previously described embodiments of the invention.

[0021] The invention further relates to a steering system for a motor vehicle, which has a steering shaft mounted rotatably about an axis, with which a rotation sensor interacts, wherein the rotation sensor is designed according to the invention.

[0022] In a stator, it can be provided that the stator form-locking elements protrude from a connecting flange between the tooth elements.

[0023] The stator and carrier form-locking elements are directed toward each other in a radial direction relative to the axis. The carrier form-locking element is arranged radially outward on an outer circumferential surface, and the corresponding stator form-locking element is arranged radially inward on an inner circumferential surface surrounding this circumferential surface. It is possible to insert the corresponding form-locking elements into one another by axially pushing the stator element onto the carrier element, creating a form-locking effect in the circumferential direction.

[0024] One advantage is that the radial connection of the carrier form-locking element to a radial outer surface of the carrier element or to a radial inner surface of the stator element creates expanded design options for improving the form-locking connection. This can facilitate simplified production and assembly, as well as increased load capacity.

[0025] Preferably, a plurality of stator and carrier form-locking elements are arranged over the circumference, preferably evenly distributed.

[0026] It is advantageous for the carrier form-locking element to have a web-shaped projection formed on the carrier element, and for the stator form-locking element to have a groove corresponding to the projection. The projection projects radially outwards from the carrier element and can preferably extend axially on an outer side in the manner of a strip or web. It can preferably be continuously connected to the carrier element over its entire axial length, for example, be formed integrally thereon. The projection has a width, measured in the circumferential direction, which corresponds to the inner width of the groove such that, when the projection is axially inserted into the groove, a form-locking engagement acting in the circumferential direction is produced. The height of the projection, measured radially outwards from the carrier element, can preferably be dimensioned such that a form-locking engagement with the groove acting in the radial direction is produced.When the stator is axially mounted on the support element for assembly, the projection slides axially into the groove, similar to the assembly of a conventional tongue-and-groove shaft connection. One advantage of this is that the stator element is automatically centered when mounted on the support element. In contrast, the aforementioned prior art requires the pin or stud protruding axially from the support element to be precisely threaded into a corresponding opening in the support element. Accordingly, the arrangement according to the invention is less sensitive to tolerances, and assembly and production are simplified.

[0027] A further advantage is that the axial length of the projection or web is, in principle, unlimited within the available assembly length, which extends from the axially projecting end face of the support element to the final assembly position of the stator element. While the axial pin or stud in the prior art cannot protrude too far for manufacturing and assembly reasons, because a relatively long, thin stud can easily be deformed or broken off, for example, during the axial assembly of a stator element, the projection according to the invention is load-bearing and stably radially fixed over its entire axial length.

[0028] An advantageous development of the aforementioned embodiment can provide for the projection to be designed in a stepped manner, with a base that can be positively received between two adjacent tooth elements, and an engagement part that projects radially from the base, which has a smaller width than the base when measured in the circumferential direction and engages in the groove of the stator positive-locking element. During axial insertion for mounting the stator element on the carrier element, the base first inserts between the axially protruding tooth elements. The base can be received between two circumferentially adjacent tooth elements in such a way that a positive lock is formed in the circumferential direction, which positions the stator element relative to the carrier element with respect to rotation about the axis. In addition, the base effects linear forced guidance in the direction of the axis.Accordingly, during assembly, the stator element is precisely positioned relative to the carrier element with respect to rotation about the axis and guided axially. Thus, the engagement part attached to the base is also precisely positioned relative to the stator element and can be easily inserted axially into the groove. In other words, the projection according to the invention, in conjunction with the toothed elements, can provide a type of axial assembly guide, which simplifies the creation of the positive engagement between the carrier positive engagement element and the stator positive engagement element.

[0029] It is also possible for the projection to be configured to converge in a wedge shape, at least in sections, in the axial direction. The assembly described above can be further simplified if the projection itself, or in the case of a stepped design, the base, the engagement part, and / or the toothed elements, are configured to be wedge-shaped or conical. For this purpose, the projection or the base and / or the engagement part can have a smaller width, measured in the circumferential direction, on the end face projecting from the support element, and / or the toothed elements can have a smaller width, measured in the circumferential direction, on their free end region projecting axially from the connecting flange.This increases the play in the circumferential direction between the base and the toothed elements on the input side, and creates a type of funnel-shaped insertion aid that can compensate for a slight angular offset to the carrier element when the stator element is being attached. Subsequently, during guided attachment, the positive locking elements are automatically aligned to the optimal engagement position. This makes it easier to create the positive locking engagement. Additionally or alternatively, it can be provided that the projection or base and / or engagement element has a radially measured height that rises in a wedge shape from the free end region towards the carrier element. This creates a type of ramp that ensures automatic centering of the stator element on the carrier element when attached.

[0030] It is preferred that the carrier element be made of a plastic, and the stator element be made of a metal. The carrier element can preferably be made of a thermoplastic polymer, preferably as an injection-molded part. The carrier form-locking elements can preferably be integrally formed thereon. The stator element is made of a magnetically conductive metal, preferably an iron-containing or nickel-containing alloy. It can be efficiently manufactured as a sheet metal part, preferably in one piece with the stator form-locking elements integrally formed thereon.

[0031] It is advantageous for a welded or welded-in connection or an adhesive connection to be formed between the stator element and the support element. Preferably, a material or at least a positive connection can be created by welding or gluing, which preferably acts counter to the axial direction during assembly by placing the stator element onto the support element. The connection can preferably be formed between the stator positive-locking element and the support positive-locking element. The welded connection can preferably be created by ultrasonic welding between a metallic stator element and a support element made of a plastic.This can be easily achieved through ultrasonic welding, in which the stator element is subjected to ultrasonic vibrations, causing the plastic to melt locally at the contact point and, after cooling, to form a material or at least a form-fitting bond with the metallic material of the stator element. This is easier to manufacture than the riveting of the pin proposed in the prior art.

[0032] A preferred embodiment is that the carrier form-locking element is formed integrally with the carrier element, and the stator form-locking element is formed integrally with the stator element.

[0033] It can be provided that the stator form-locking element has at least one tongue protruding radially inward from the connecting flange, which tongue can be connected to an outer circumferential surface of the carrier element. The tongue can be designed as an elastic sheet metal tongue or tab, which can preferably be formed integrally with the stator element. For example, its freely projecting end region can engage in a corresponding form-locking recess formed on the outside of the carrier element. The tongue can be designed to be spring-elastic. This allows it to be pressed against the carrier element from the outside under spring tension.The tongue can protrude obliquely to the axis from the connecting flange, so that a barb-shaped arrangement is formed which engages in a corresponding carrier form-locking element of the carrier element, for example in a retaining groove formed from the outside in the carrier element, behind a retaining projection or the like.

[0034] The locking element according to the invention can advantageously be implemented on a carrier and / or stator form-locking element together with one of the radially projecting designs described above, but is not limited thereto. It can also be arranged independently on an axially or diagonally aligned carrier and / or stator form-locking element. Description of the drawings

[0035] Advantageous embodiments of the invention are explained in more detail below with reference to the drawings. In detail: Fig. 1 is a schematic perspective view of a steering column according to the invention for a motor vehicle, Fig. 2 a longitudinal section through the steering column according to Fig. 1 along the axis L, Fig. 3 an enlarged detailed view Fig. 2, Fig. 4a a stator according to the invention of the rotation sensor of the steering column according to Fig. 1-3 in a cut-out schematic perspective view, Fig. 4b is a schematic axially exploded view of the stator according to Fig. 4a, Fig. 5 a stator element according to the invention in a first embodiment of a stator according to Fig. 4a / b, Fig. 6 a stator in the first embodiment comprising a stator element according to Fig. 5 in longitudinal section, Fig. 7 an axial plan view of the stator according to Fig. 6, Fig. 8 a cross section AA through the stator according to Fig. 6, Fig. 9 a stator in a second embodiment in longitudinal section analogous to Fig. 6, Fig. 10 is a partial perspective view of a stator element in the second embodiment of the stator according to Fig. 9, Fig. 11 a stator in a third embodiment in longitudinal section, Fig. 12 a perspective partial view of a stator element in the third embodiment of the stator according to Fig. 11, Fig. 13 a stator in a fourth embodiment in longitudinal section, Fig. 14 a partial perspective view of a stator element in the fourth embodiment of the stator according to Fig. 13. Embodiments of the invention

[0036] In the various figures, identical parts are always provided with the same reference symbols and are therefore usually named or mentioned only once.

[0037] Fig. Figure 1 shows a schematic perspective view of a steering column 1 of a motor vehicle steering system, which is designed as a steer-by-wire steering column. This comprises a casing unit 2 in which a steering shaft, here a steering spindle 21, is rotatably mounted about its longitudinal axis, the axis L.

[0038] At its rear end, facing the driver's position, the steering spindle 21 has a mounting section 22 for attaching a manual steering handle (not shown here), such as a steering wheel or the like. The steering spindle can be rotated about the axis L to input manual steering commands.

[0039] Fig. 2 shows a longitudinal section along the axis L through the steering column 1.

[0040] The jacket unit 2 is held by a support unit 3, which - on its Fig. 2 upper side - can be mounted on a motor vehicle body not shown here.

[0041] A clamping device 31 engages the support unit 3, which can be moved into either a locking position or a release position by manually actuating a clamping lever 32. In the locking position, the casing unit 2 is clamped to the support unit 3. In the release position, the casing unit 2 can be pivoted up and down relative to the support unit 3 about a height adjustment axis 33 arranged in the front area, thus enabling a height adjustment of the steering wheel in the height direction H, as indicated by the double arrow.

[0042] The casing unit 2 is axially adjustable back and forth relative to a telescopically extending inner casing 23 in the release position of the clamping device 31. This enables longitudinal adjustment of the steering wheel in the direction of the axis L, as indicated by the double arrow.

[0043] To enable longitudinal adjustment, the steering spindle 21 also has a steering shaft part 24 which is telescopically adjustable and is coupled to the steering spindle 21 in a rotationally fixed manner.

[0044] An electro-motoric feedback actuator 4 is attached to the jacket unit 2 - in the example at the front end area. As shown in Fig. 2, it has a rotor 41 which can be driven electrically to rotate about the axis L and which is connected to the steering shaft part 24 via a torsionally elastic torsion bar 42.

[0045] Via the rotor 41, the feedback actuator 4 can introduce a feedback torque into the steering shaft part 24 depending on the current operating parameters of the vehicle. This feedback torque is transmitted via the steering spindle 21 to the manual steering handle in order to create a realistic driving feel by simulating a mechanical reaction from the steered wheels. A manual torque, which counteracts the feedback torque and is manually applied to the steering column via the steering wheel, causes the torsion bar 42 to be elastically twisted in a defined manner, and the steering shaft part 24 is rotated relative to the rotor 41.

[0046] The relative rotation of the steering shaft part 24 to the rotor 41 is a measure of the applied steering torque. This can be detected by means of a rotation sensor 5 designed according to the invention, which in the example shown is housed in the housing of the feedback actuator 4.

[0047] The configuration of a rotation sensor 5 shown here for a steer-by-wire steering column with a feedback actuator can equally be used on a conventional steering column mechanically coupled to steerable wheels. In this case, the feedback actuator can be omitted or replaced by an electric auxiliary drive. Instead of the rotor 41, an intermediate shaft leading to the steering gear can be coupled to the torsion bar 42, or the rotor 41 can be coupled to the steering spindle 21 or the intermediate shaft as part of an auxiliary drive.

[0048] The rotation sensor 5 is shown in an enlarged detail view of Fig. 2 in Fig. 3. This comprises magnetic elements 51 attached to the steering shaft part 24, which are surrounded by a stator 52 connected to the rotor 41. A relative rotation of the steering shaft part 24 relative to the rotor 41 leads to a torque-dependent torsion of the torsion bar 42 and to a rotation of the magnets 51 relative to the stator 52. This can be measured by a change in the magnetic flux in the stator elements 6 of the stator 52.

[0049] The stator 52 is in Fig. 4a shown individually, and in Fig. 4b in a schematic axially expanded representation in the direction of the axis L.

[0050] Two stator elements 6a and 6b are fixed in mirror image on the two axial end faces of a carrier element 7. In Fig. In Figure 4b, the arrows indicate the mounting direction M, in which the stator elements 6a and b are axially mounted on the carrier element 7 for assembly.

[0051] The two stator elements 6a and 6b are identically shaped and are also generally designated by the reference numeral 6 below. They can preferably be formed as a one-piece sheet metal part made of sheet steel.

[0052] A single stator element 6 is shown in a perspective view in Fig. 5. This has an annular disk-shaped connecting flange 61 with a coaxial through-hole. Toothed elements 62 extend from the connecting flange in the axial direction, distributed over the circumference. In the example, there are eight toothed elements 62, evenly distributed over the circumference. Gaps remain between the toothed elements 62 that are wider than the toothed elements 62, each measured in the circumferential direction.

[0053] The two stator elements 6a and 6b are fixed to the two axial end faces of the carrier element 7 in such a way that the connecting flanges 61a and 61b are axially spaced and the tooth elements 62a of one stator element 61 engage claw-like in the gaps between the tooth elements 62b of the other stator element 62. This assembled state is shown in the longitudinal section along the axis L in Fig. 6 recognizable.

[0054] Out of Fig. 6 is together with the Fig. 7 shown axial plan view and with the Fig. From the cross-section AA shown in Figure 8, it can be seen that stepped projections 71 are formed on the carrier element 7 as carrier form-locking elements in cross section, which are integrally formed on the carrier element 7, which is formed as a plastic injection-molded part. The projections 71 have a base 72 protruding radially from the carrier body 7, from which a web-shaped engagement part 73 protrudes further radially outwards. The width of the base 72, measured in the circumferential direction, is adapted such that the base 72 is received in a form-fitting manner in the circumferential direction between adjacent tooth elements 62 of the stator element 6.

[0055] The connecting flange 61 has grooves 63 formed radially outward on the inner circumference, into each of which an engagement part 73 engages in a form-fitting manner, preferably radially and in the circumferential direction.

[0056] In the Fig. 9 and Fig. 10 shows a second embodiment, wherein Fig. 9 a longitudinal section analogous to Fig. 6. Instead of the grooves 63 of the first embodiment according to Fig. 5, the stator element 6 has stator form-locking elements in the form of locking elements 64. A locking element 64 protrudes in the axial direction from the connecting flange 61 of the stator element 6. It has a barbed tip 65, which Fig. 10 is clearly visible. This forms a fixing claw that plastically molds into the softer plastic material of the carrier body 7. Thus, the stator element 6 can be brought into a positive locking engagement with the carrier body 7 by simple axial compression, as in Fig. 9, whereby a positive connection effective in the axial direction is formed.

[0057] In the Fig. 11 and Fig. 12 is in the same views as in Fig. 9 and Fig. 10 shows a third embodiment. In this embodiment, radially and axially obliquely projecting, radially elastically resilient tongues 66 are formed on the inner edge of the through-opening of the connecting flange 61. These tongues each have a fixing claw in the form of a radially inwardly directed sharp edge 67 or cutting edge. If the stator element 6 is axially mounted in the axial assembly direction M onto a cylindrical section 74 of the carrier element 7, the edge 67 digs plastically into the plastic material of the carrier body 7 and creates a positive connection effective in the axial direction.

[0058] In the Fig. 13 and Fig. 14 is in the same views as in Fig. 9 and Fig. 10 shows a fourth embodiment. Barb-shaped locking fingers 75 are formed on the carrier body 7. These are formed in a radially resilient one-piece from the plastic of the carrier element 7 and have a barb-shaped undercut. To create a positive locking effect in the axial direction when the stator element 6 is plugged on in the axial assembly direction M, they can snap into an edge region 68 of the connecting flange 61 between the tooth elements 62, which edge region is shown in dashed lines in Fig. 14 is indicated. List of reference symbols 1 steering column 2 jacket unit 21 Steering spindle 22 Fastening section 23 inner jacket 24 Steering shaft part 3 carrying unit 31 clamping device 32 clamping levers 33 Height adjustment axis 4 Feedback actuator 41 Rotor 42 torsion bar 5 rotation sensor 51 Magnetic element 52 Stator 6 a / b stator element 61 a / b connecting flange 62 a / b tooth element 63 grooves 64 locking element 65 peak 66 Tongue 67 edge 68 Marginal area 7 Support element 71 lead 72 Base 73 engaging part Section 74 75 locking fingers L axis (longitudinal axis) H Altitude direction M Mounting direction

Claims

[1] Stator (52) of a rotation sensor (5) for a steering system (1) of a motor vehicle, comprising two stator elements (6) which are fixed to a carrier element (7) and which extend coaxially around an axis (L) in a ring-shaped manner and have axially spaced-apart connecting flanges (61), from which tooth elements (62) extend axially directed towards one another and distributed over the circumference, which tooth elements are arranged in the circumferential direction between the tooth elements (62) of the respective other stator element (6), wherein a stator element (6) has at least one stator form-locking element (63, 64, 65, 66) which is positively connected to a corresponding carrier form-locking element (71, 72, 73, 74, 75) of the carrier element (7), characterized bythat a carrier form-locking element (71, 72, 73, 74, 75) and / or the stator form-locking element (63, 64, 65, 66) have at least one locking element (64, 66, 75) which can be brought into locking engagement with the stator element (6) or the carrier element (7) in the axial direction, which has a form-locking effect in the axial direction. [2] Stator according to claim 1, characterized by that the locking element (64, 66, 75) is elastic. [3] Stator according to claim 1 or 2, characterized by that the locking element (64, 66, 75) can be brought into locking engagement in the axial or radial direction. [4] Stator according to one of the preceding claims, characterized by that the locking element (64, 66, 75) has a fixing claw (67). [5] Rotation sensor (5), comprising a magnetic element (51) rotatably arranged about an axis (L) and surrounded by a stator (52), characterized by that the stator (52) is designed according to one of claims 1 to 4. [6] Steering system for a motor vehicle, which has a steering shaft (21) rotatably mounted about an axis (L) with which a rotation sensor (5) interacts, characterized by that the rotation sensor (5) is designed according to claim 5.

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