Central locking and motor vehicle

Abstract

The invention relates to a central closure for fixing a rim to a wheel hub of a motor vehicle, wherein the central closure has a first external thread formed on the wheel hub, wherein the central closure has a central nut which has a first internal thread complementary to the first external thread, and wherein the central closure has a securing element which, in the assembled state of the central closure, is in positive engagement on the one hand with the wheel hub and on the other hand with the central nut screwed onto the wheel hub and prevents rotation of the central nut relative to the wheel hub. A radially compact design can be achieved if the securing element is ring-shaped and has a first external toothing and a second external toothing axially spaced from the first external toothing, if the central nut has a first internal toothing complementary to the first external toothing, which in the assembled state of the central lock is in positive engagement with the first external toothing, and if the wheel hub has a second internal toothing complementary to the second external toothing, which in the assembled state of the central lock is in positive engagement with the second external toothing.

Description

[0001] The present invention relates to a central locking device for fixing a rim to a wheel hub of a motor vehicle, according to the preamble of claim 1.

[0002] The invention also relates to a motor vehicle equipped with at least one such central locking device.

[0003] Such a central locking mechanism, used to secure a rim to a motor vehicle wheel hub, is also known as a hub lock. This type of central locking mechanism allows a rim to be centered on the respective wheel hub with high precision, which is particularly advantageous for sports cars. Such central locking mechanisms are well known in motor racing, where they allow a wheel to be changed as quickly as possible during a race. A central locking mechanism is particularly suitable for this purpose, as only a single screw connection needs to be loosened and replaced to change the wheel.

[0004] A generic central locking device is known, for example, from DE 10 2011 011 005 A1 and comprises an external thread formed on the wheel hub and a central nut which has an internal thread complementary to the external thread. The central locking device is also equipped with a locking element which, when the central locking device is mounted, engages positively with the wheel hub on the one hand and with the central nut screwed onto the wheel hub on the other, thereby preventing the central nut from rotating relative to the wheel hub. The central nut clamps a rim to the wheel hub in order to connect it to the wheel hub in a rotationally fixed manner. In the known central locking device, the locking element is designed as a locking cap which has a cylindrical core with external teeth and a cylindrical collar with internal teeth arranged concentrically to the core.The external teeth of the known locking element engage positively with the internal teeth of the wheel hub, while the internal teeth of the known locking element engage positively with the external teeth of the central nut. As a result, the locking element requires a comparatively large amount of radial space. Another problem with such a central locking system is that the locking element can become stuck during extended use due to the positive engagement with the hub and the central nut, making it difficult to remove from the wheel hub and the central nut.

[0005] From DE 10 2017 211 304 A1 a central locking device with a locking crown is known, which engages positively with the wheel hub and the central nut.

[0006] DE 10 2019 103 839 A1 discloses a central locking device for a motor vehicle wheel, in which pins are provided inside a central screw element. These pins are secured in an extended position and protrude radially from the screw element. For this purpose, the pins are pushed outward by a preloaded ramp. To release the screw element, a tool pushes the ramp inward in the axial direction, and the pins are retracted into the screw element.

[0007] From DE 20 2009 002 215 U1 a securing cap for a central locking nut is known, wherein movable locking pins and a securing latch are formed inside the securing cap, which engage with the wheel hub and the nut.

[0008] EP 4 129 712 A1 discloses a central threaded closure sleeve with expandable locking arms. The locking arms are expanded by means of a screwable conical element and thus engage with the hub.

[0009] The present invention addresses the problem of providing an improved or at least a different embodiment for such a central locking device and for a motor vehicle equipped therewith, which is characterized in particular by a radially compact design. Optionally, the locking element should be relatively easy to remove from the wheel hub and / or the central nut, particularly for a wheel change.

[0010] This problem is solved according to the invention by the subject matter of the independent claim. Advantageous embodiments are the subject matter of the dependent claims.

[0011] The invention is based on the general idea of forming two external toothings on the locking element that are axially spaced from one another, with one external toothing interacting with the central nut and the other external toothing interacting with the wheel hub to create the respective positive engagement. By using two external toothings and the axial spacing of the two external toothings, both external toothings are located on the radial outside of the locking element, so that the locking element can be realized with an extremely compact design in the radial direction. Accordingly, the locking element requires little installation space within the central locking device, at least in the radial direction.

[0012] In detail, the invention proposes that the securing element be designed in a ring shape and be equipped with a first external toothing and with a second external toothing axially spaced from the first external toothing. The central nut is equipped with a first internal toothing complementary to the first external toothing, which, when the central lock is mounted, engages positively with the first external toothing. The wheel hub is equipped with a second internal toothing complementary to the second external toothing, which, when the central lock is mounted, engages positively with the second external toothing. When the central nut is mounted on the wheel hub, the two internal toothings are then also axially spaced from one another.In particular, the wheel hub, central nut, and locking element can be coordinated with one another such that the screw connection between the first internal thread formed on the central screw and the first external thread formed on the wheel hub, and the positive engagement between the locking element and the wheel hub by means of the second external toothing and the second internal toothing, are located axially essentially in the same area, whereby the central closure is also constructed compactly in the axial direction. In particular, it can be provided for this purpose that the second internal toothing is formed on an inner side of an axial end section of the wheel hub, with the first external thread being formed on an outer side of this end section of the wheel hub.

[0013] In an advantageous embodiment, the securing element can have a ring body which extends in a circumferential direction of the securing element and on which the first external toothing is formed. Furthermore, the securing element can have a plurality of radially spring-elastic fingers which project axially from the ring body and which follow one another in the circumferential direction of the securing element and are spaced apart from one another. Furthermore, it can be provided that the second external toothing is formed in sections on the fingers. Consequently, each finger of the securing element has a section of the second external toothing. The sections of the second external toothing formed on the fingers together form the second external toothing. The second external toothing is formed on end sections of the fingers remote from the ring body, i.e. in the region of the fingers which can be radially adjusted by the spring elasticity of the fingers.Because the fingers protrude axially from the ring body, they are resilient in the radial direction, i.e., radially resilient. This radial resilience simplifies the release of the positive engagement between the second external toothing and the second internal toothing to release the central locking mechanism, for example, during a wheel change.

[0014] In an advantageous embodiment, the fingers of the securing element can have or assume a neutral position in an unloaded state, in which the second external toothing does not engage, or does not fully engage, radially with the second internal toothing. The central closure can now also be equipped with a closure cap having a cylindrical casing that is axially inserted into the securing element. Furthermore, the casing can be configured such that when the casing is axially inserted into the securing element, the casing interacts radially outward with the fingers and displaces them radially outward from the neutral position into a preloaded position, in which the second external toothing engages more deeply with the second internal toothing than in the neutral position.In other words, the positive engagement between the second external toothing and the second internal toothing, i.e. between the locking element and the wheel hub, is only created or completed when the casing is inserted into the locking element. When the cap is removed, the radial preload between the casing and the fingers is removed, whereby the fingers, which are preloaded into the neutral position due to their spring elasticity, automatically attempt to assume the neutral position. This supports or simplifies the release of the positive engagement between the wheel hub and the locking element. The second internal toothing and the second external toothing can have axially extending teeth which each have a conical profile transverse to the axial direction, with the axial teeth of the second external toothing tapering radially outwards, while the axial teeth of the second internal toothing taper radially inwards.

[0015] In the present context, a ‘configuration’ corresponds to a ‘design’ and / or a ‘facility’, so that the phrase ‘configured so that’ is synonymous with the phrase ‘designed and / or arranged so that’.

[0016] According to an advantageous embodiment, the closure cap can have a preload contour radially on the outside of the jacket, which is conical on the radial outside with respect to the axial direction and tapers in an insertion direction of the jacket. In other words, the preload contour has a ramp-shaped profile radially on the outside transverse to a circumferential direction of the closure cap or the jacket, which slopes radially inwards in the insertion direction of the jacket. This preload contour increases the radial displacement effect when the jacket is inserted axially, causing the fingers to spread or increasing the radial engagement between the second external toothing and the second internal toothing. At the same time, only a comparatively small axial adjustment travel is required for the jacket to generate the desired spread, which supports a compact design.

[0017] In another embodiment, the securing element can be conical in the area of the fingers radially inward relative to the axial direction and taper in the direction of insertion of the casing. In other words, the fingers each have a ramp-shaped profile radially inward, transverse to the circumferential direction of the securing element, which rises radially inward in the direction of insertion of the casing. This shape also supports the radial spreading of the fingers during axial insertion of the casing. At the same time, it also reduces the required travel for the casing.

[0018] In another embodiment, the closure cap can have a cap base that axially closes the casing. The cap base can project radially beyond the casing and thereby form a circumferential flange that has a second external thread on the radial outside. The central nut can then have a second internal thread complementary to the second external thread, wherein in the assembled state of the central closure, the second external thread is screwed into the second internal thread. The closure cap and the securing element can be rotated relative to one another in the circumferential direction of the securing element for mounting and dismounting the closure cap. The closure cap is held to the central nut by this second screw connection. This second screw connection also couples the axial insertion of the casing with a rotational movement.

[0019] In another advantageous embodiment, the central nut can have an annular step in the region of the second internal thread, wherein the central nut, the locking element, and the closure cap can be coordinated with one another such that the locking element extends axially with its end face up to the annular step and that the flange is directly or indirectly axially supported on the annular step and on the end face of the locking element. In other words, the flange radially overlaps the end face of the locking element and the annular step of the central nut. The closure cap thus forms an axial stop for the locking element in a direction away from the wheel hub.

[0020] The flange can be axially supported by a disc-shaped axial seal on the annular step and on the face of the retaining element. The axial seal prevents contaminants from penetrating the gear teeth and screw connections.

[0021] In another advantageous embodiment, a retaining ring can be arranged axially on the central nut between the first external toothing and the second external toothing, which positively prevents axial displacement of the retaining element toward the wheel hub. This secures the retaining element in its axial position toward the wheel hub.

[0022] In another embodiment, the central nut can have at least one grease chamber and at least one grease channel radially outwardly, which fluidly connects the respective grease chamber to a screw connection area in which the first internal thread is screwed to the first external thread. This greases the screw connection area, which prevents or at least hinders jamming of the screw connection.

[0023] In a practical embodiment, the central nut can have several grease chambers distributed in the circumferential direction, each of which is fluidly connected to the screw connection area via a grease channel. Furthermore, the central nut can have a lubrication groove on the radial outside that fluidly connects the grease chambers to one another. Optionally, the central nut can have a disk on the radial outside that covers the grease chambers and the lubrication groove.

[0024] A motor vehicle according to the invention, which may in particular be a passenger car, has a plurality of wheel hubs and is equipped with a plurality of wheels, each of which has a rim, wherein the respective rim is fixed to one of the wheel hubs. At least one of these rims is fixed to the respective wheel hub with a central locking mechanism of the type described above.

[0025] Further important features and advantages of the invention emerge from the subclaims, from the drawings and from the associated description of the figures with reference to the drawings.

[0026] It is understood that the features mentioned above and those to be explained below can be used not only in the respective combination specified, but also in other combinations or on their own, without departing from the scope of the invention. Components mentioned above and to be mentioned below of a higher-level unit, such as a device, an apparatus, or an arrangement, which are designated separately, may form separate parts or components of this unit or be integral areas or sections of this unit, even if this is shown differently in the drawings.

[0027] Preferred embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description, wherein the same reference numerals refer to the same or similar or functionally identical components.

[0028] They show, schematically, Fig. 1 a sectional view of a motor vehicle in the area of a central locking device, Fig. 2 a sectional view of the central shutter, Fig. 3 an exploded isometric view of the central shutter, Fig. 4 a sectional view of the central locking mechanism in the area of a central nut, Fig. 5 a detail from Fig. 4 with a securing element and a closure cap in a first state, Fig. 6 the detail from Fig. 5, but with the securing element and the closure cap in a second state, Fig. 7 an isometric view of a securing element, Fig. 8 an isometric view of the central nut.

[0029] Accordingly Fig. 1, a motor vehicle 1 comprises several wheel hubs 2 and several wheels 3, each having a rim 4. In Fig. 1, the vehicle 1 is shown only in the area of such a wheel hub 2, so that only one of the wheels 3 and only one of the rims 4 is partially visible. The respective wheel 3 is fixed to the corresponding wheel hub 3 via its rim 4. For this purpose, a central lock 5 is used, which can also be referred to as a wheel hub central lock 5 and is described below with reference to the Fig. 2 to 8 are explained in more detail.

[0030] In the example of the wheel hub 2, Fig. 1 also has a brake disc 6 and is rotatably mounted via wheel bearings 7 on a wheel carrier not shown here.

[0031] According to the Fig. 2 to 4, the central closure 5 comprises a first external thread 8 formed on the wheel hub 2. The first external thread 8 is formed on an end section of the wheel hub 2 or a central neck 9 of the wheel hub 2, which according to Fig. 1 through the brake disc 6 and into a central annular region of the rim 4. The central closure 5 also has a central nut 10, which has a first internal thread 11 complementary to the first external thread 8. The central closure 5 also has a securing element 12, which, in the assembled state of the central closure 5, engages in a form-fitting manner on the one hand with the wheel hub 2 and on the other hand with the central nut 10 screwed onto the wheel hub 2, thereby preventing the central nut 10 from rotating relative to the wheel hub 2.

[0032] The securing element 12 is here according to the Fig. 2 to 7 is designed in a ring shape and has a first external toothing 13 and a second external toothing 14, which is axially spaced from the first external toothing 13. The axial direction is defined by a longitudinal central axis of the annular securing element 12, which is parallel to a Fig. 2, the rotational axis 15 of the wheel hub 2, indicated by a dot-dash line. A radial direction runs transversely to the axial direction and is, in particular, perpendicular to the respective longitudinal center axis. A circumferential direction runs around the respective longitudinal center axis.

[0033] The central nut 10 has a first internal toothing 16 complementary to the first external toothing 13, which, when the central locking device 5 is in the assembled state, positively engages the first external toothing 13. The wheel hub 2 has a second internal toothing 17 complementary to the second external toothing 14, which, when the central locking device 5 is in the assembled state, positively engages the second external toothing 14. The respective external toothing 13, 14 has axially extending teeth, which are not designated in more detail here. The associated internal toothing 16, 17 has complementary axially extending teeth, which are not designated in more detail here.

[0034] The securing element 12 has, according to the Fig. 2 to 7 has an annular body 18 which runs in a circumferential direction 19 of the securing element 12, which in Fig. 7 is indicated by a double arrow. The first external toothing 13 is formed on the annular body 18. The securing element 12 also has a plurality of spring-elastic fingers 20 which project axially from the annular body 18 and follow one another in the circumferential direction 19 and are spaced apart from one another. The second external toothing 14 is formed on the fingers 20 such that each finger 20 has a circumferential section of the second external toothing 14. The second external toothing 14 is thus formed by the circumferential sections of the fingers 20. The fingers 20 extend axially from the annular body 18 and are therefore radially spring-elastic. The fingers 20 are formed from the same material as the annular body 18, so that the securing element 12 is formed by a single component which has the annular body 18 and the fingers 20.Due to the ring body 18 and the fingers 20 projecting therefrom, the securing element 12 is designed in the manner of a crown and can also be referred to as a securing crown 12.

[0035] The fingers 20 of the securing element 12 have in an unloaded state, which is in the Fig. 3, Fig. 6 and Fig. 7, a neutral position in which the second external toothing 14 does not engage or does not fully engage radially with the second internal toothing 17. The central closure 5 is now in accordance with the Fig. 1 to 6 are also equipped with a closure cap 21 having a cylindrical casing 22. In the assembled state, the casing 22 is inserted axially into the securing element 12. The casing 22 is configured or dimensioned such that when the casing 22 is inserted into the securing element 12, the casing 22 interacts radially outward with the fingers 20 in such a way that the casing 22 displaces or spreads the fingers 20 radially outward from the neutral position into a pre-tensioned position, which in the assembled state of the Fig. 1, Fig. 2, Fig. 4 and Fig. 5. In the preload position, the fingers 20 are thus adjusted radially outward toward the wheel hub 2, so that the second external toothing 14 engages further into the second internal toothing 17 than in the neutral position. A configuration is also conceivable in which the second external toothing 14 does not engage with the second internal toothing 17 in the neutral position, so that the positive engagement is only created when the fingers 20 are adjusted to the preload position.

[0036] For an improved displacement effect or spreading effect, the closure cap 21 can have a pre-tensioning contour 23 radially outside on the casing 22, which is conically designed radially outside in the axial direction, such that it tapers in an insertion direction 24 of the casing 22, which in Fig. 4 is indicated by an arrow. The preload contour 23 has a ramp-shaped profile 25 radially outwardly, transversely to a circumferential direction of the closure cap 21 or the jacket 22, which slopes radially inward in the insertion direction 24. Due to the conical preload contour 23, the radial spreading of the fingers 20 during insertion of the jacket 22 can be achieved over a comparatively short axial adjustment path.

[0037] The securing element 12 can be configured to be conical radially inward, at least in the region of the fingers 20, such that the securing element 12 tapers in the region of the fingers 20 in the insertion direction 24. For this purpose, the fingers 20 each have a ramp-shaped profile 26 radially inward and transverse to the circumferential direction 19 of the securing element 12, which rises radially inward in the insertion direction 24. Here, too, the ramp-shaped profile 26 of the fingers 20 leads to an improved spreading effect when inserting the casing 22.

[0038] The closure cap 21 has a cap base 27 which axially closes the casing 22. According to the Fig. 4 to 6, the cap base 27 forms a circumferential flange 28 that projects radially outward beyond the casing 22. The flange 28 has a second external thread 29 on the radial outside. Complementary to this, the central nut 10 has a second internal thread 30. When the central closure 5 is assembled, the closure cap 21 is screwed to the central nut 10 such that the second external thread 29 is screwed into the second internal thread 30. The closure cap 21 and the securing element 12 are configured such that they can be rotated relative to one another for assembling and disassembling the closure cap 21. In other words, the securing element 12 is mounted radially inwardly on the casing 22 of the closure cap 21 in a floating or rotatable manner.

[0039] According to Fig. 4, the central nut 10 has an annular step 31 in the area of the second internal thread 30. The securing element 12 extends with an axial end face 32 axially up to the annular step 31. This end face 32 is facing away from the fingers 20 or is formed on the annular body 18. The flange 28 can now be axially supported directly or indirectly on the annular step 31 and on the end face 32 in the assembled state. In the example shown here, indirect axial support can be seen in each case, namely the support of the flange 28 on the annular step 31 and on the end face 32 via a disc-shaped axial seal 33, which axially rests on the flange 28 on the one hand and axially on the annular step 21 and on the end face 32 on the other.

[0040] According to Fig. 4, the central nut 10 may have a retaining ring 34 arranged axially between the first external toothing 13 and the second external toothing 14. The retaining ring 34 positively prevents axial displacement of the retaining element 12 in the direction of the wheel hub 2. In the opposite direction, axial displacement of the retaining element 12 is positively prevented by the flange 28.

[0041] In the Fig. 5 and Fig. 6 shows the interaction between the securing element 12 and the closure cap 21. In the assembled state according to Fig. 5, the casing 22 is inserted axially into the securing element 12 according to the insertion direction 24 so far that the casing 22 or its preload contour 23 spreads the fingers 20, i.e. radially outwards displaces them into the preload position in order to create the positive engagement between the second external toothing 14 and the second internal toothing 17, which creates a rotation lock between the wheel hub 2 and the securing element 12. During disassembly, the closure cap 21 is removed according to Fig. 6 is axially adjusted counter to the insertion direction 24, whereby the spreading effects of the casing 22 or the preload contour 23 are correspondingly reduced. Due to their spring elasticity and their preload, the fingers 20 can be adjusted radially inward into the neutral position, which releases or at least reduces the positive engagement between the second external toothing 14 and the second internal toothing 17. In the example, the closure cap 21 is prevented from falling out of the securing element 12 by an additional retaining ring 35.

[0042] According to the Fig. 4 and Fig. 8, the central nut 10 can have at least one grease chamber 36 and at least one grease channel 37 radially outwardly. The respective grease channel 37 fluidly connects the respective grease chamber 36 to a screwing area 38 in which the first internal thread 11 is screwed to the first external thread 8. According to Fig. 8, several, for example three, grease chambers 36 can be formed on the central nut 10, which in a circumferential direction 39 of the central nut 10, which in Fig. 8 is indicated by a double arrow, are distributed and spaced apart from each other. Each grease chamber 36 is fluidically connected to the screw connection area 38 via such a grease channel 37. Accordingly Fig. 8, the central nut 10 may also have a lubrication groove 40 radially outwardly, which fluidically connects the grease chambers 36. In addition, the central nut 10 may be Fig. 2 to 4 have a disk 41 radially outwardly, which is shaped to cover the grease chambers 36 and the greasing groove 40. The disk 41 can be made according to the Fig. 3 and Fig. 4 also have a slot 42 through which grease also reaches the rim 4, provided as here according to Fig. 1 the central nut 10 is supported on the rim 4 via the disc 41. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2011 011 005 A1

[0004] DE 10 2017 211 304 A1

[0005] DE 10 2019 103 839 A1

[0006] DE 20 2009 002 215 U1

[0007] EP 4 129 712 A1

[0008]

Claims

[1] Central locking device (5) for fixing a rim (4) to a wheel hub (2) of a motor vehicle (1), - wherein the central closure (5) has a first external thread (8) formed on the wheel hub (2), - wherein the central closure (5) has a central nut (10) which has a first internal thread (11) complementary to the first external thread (8), - wherein the central lock (5) has a securing element (12) which, in the assembled state of the central lock (5), is in positive engagement with the wheel hub (2) on the one hand and with the central nut (10) screwed onto the wheel hub (2) on the other hand, and prevents rotation of the central nut (10) relative to the wheel hub (2), characterized by , - that the securing element (12) is annular and has a first external toothing (13) and a second external toothing (14) axially spaced from the first external toothing (13), - that the central nut (10) has a first internal toothing (16) complementary to the first external toothing (13), which, in the assembled state of the central lock (5), engages positively with the first external toothing (13), - that the wheel hub (2) has a second internal toothing (17) complementary to the second external toothing (14), which in the assembled state of the central lock (5) is in positive engagement with the second external toothing (14). [2] Central closure (5) according to claim 1, characterized by , - that the securing element (12) has a ring body (18) which runs in a circumferential direction (19) of the securing element (12) and on which the first external toothing (13) is formed, - that the securing element (12) has a plurality of spring-elastic fingers (20) projecting axially from the annular body (18), which fingers follow one another in the circumferential direction (19) of the securing element (12) and are spaced apart from one another, - that the second external toothing (14) is formed in sections on the fingers (20). [3] Central closure (5) according to claim 2, characterized by , - that the fingers (20) of the securing element (12) have a neutral position in an unloaded state, in which the second external toothing (14) does not engage or does not fully engage radially with the second internal toothing (17), - that the central closure (5) has a closure cap (21) which has a cylindrical casing (22) which is inserted axially into the securing element (12), - that the casing (22) is configured such that when the casing (22) is inserted into the securing element (12), the casing (22) interacts radially outwardly with the fingers (20) and displaces them radially outwardly from the neutral position into a preloaded position in which the second external toothing (14) engages further into the second internal toothing (17) than in the neutral position. [4] Central closure (5) according to claim 3, characterized by , - that the closure cap (21) has a pre-tensioning contour (23) radially outside on the casing (22), - that the preload contour (23) is conical on the radial outside and tapers in an insertion direction (24) of the casing (22). [5] Central closure (5) according to claim 3 or 4, characterized by , - that the securing element (12) is conical radially inward in the region of the fingers (20) and tapers in an insertion direction (24) of the casing (22). [6] Central closure (5) according to one of claims 3 to 5, characterized by , - that the closure cap (21) has a cap base (27) which axially closes the casing (22), - that the cap base (27) forms a circumferential flange (28) which has a second external thread (29) radially outward, - that the central nut (10) has a second internal thread (30) complementary to the second external thread (29), - that in the assembled state of the central locking device (5) the second external thread (29) is screwed into the second internal thread (30), - that the closure cap (21) and the securing element (12) can be rotated relative to one another in the circumferential direction (19) for mounting and dismounting the closure cap (21). [7] Central closure (5) according to claim 6, characterized by , - that the central nut (10) has an annular step (31) in the area of the second internal thread (30), - that the securing element (12) extends with an end face (32) axially up to the annular step (31), - that the flange (28) is directly or indirectly axially supported on the annular step (31) and on the end face (32) of the securing element (12). [8] Central closure (5) according to claim 7, characterized by , - that the flange (28) is axially supported on the annular step (31) and on the end face (32) of the securing element (12) via a disc-shaped axial seal (33). [9] Central closure (5) according to one of claims 2 to 8, characterized by , - that a locking ring (34) is arranged axially on the central nut (10) between the first external toothing (13) and the second external toothing (14), which positively prevents axial adjustment of the locking element (12) in the direction of the wheel hub (2). [10] Motor vehicle (1), in particular passenger car, - with multiple wheel hubs (2), - with several wheels (3), each having a rim (4) which is fixed to one of the wheel hubs (2), - wherein at least one of the rims (4) is fixed to the respective wheel hub (2) with a central closure (5) according to one of the preceding claims.

Images