Abstract:
A form-locking connection with compensation of position errors including a first component and a second component to be connected to each other; characterized by a first circular form-locking element associated with the first component; a second circular form-locking element associated with the second component, and a compensating element provided between the first form-locking element and the second form-locking element, wherein the form-locking elements are fixed in the axial position thereof and together with the compensating element form an interlocking arrangement which positions the first component and the second component with respect to each other, wherein a side of the first form-locking element which faces the second from locking element is provided with a first surface which is curved in the manner of a spherical segment and the center point of curvature of which is positioned on the axis of the first form-locking element; wherein that side of the second form-locking element which faces the first form-locking element is provided with a second surface which is curved in the manner of a spherical segment and the center point of curvature of which is positioned on the axis of the second form-locking element, and wherein the compensating element, on the sides thereof remote from each other in the axial direction, has a third surface and a fourth surface respectively curved in the manner of spherical segments, the respective curvatures of which surfaces are matched to the facing first surface and second surface curved in the manner of spherical segments.

Description:
RELATED APPLICATIONS 
       [0001]    This application is a continuation of International Application PCT/EP2011/005024 filed on Oct. 7, 2011 claiming priority from German Application DE 10 2010 038 067.9 filed on Oct. 8, 2010, both of which are incorporated in their entirety by this reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to a form-locking connection with a compensation of position errors, in particular axis offset and/or axis angle deviation according to the preamble of patent claim  1 . The invention furthermore relates to a screw, a nut and a compensation element of a form-locking connection of this type. 
       BACKGROUND OF THE INVENTION 
       [0003]    Form-locking connections which connect two components with one another and which are configured to receive radial forces with respect to a connection axis without clearance have to include an exact tolerance-free coincidence of the axes of the respective form-locking elements in the components to be connected with one another. When more than one form-locking connection is provided for attaching the two components at one another, wherein each form-locking connection shall provide clearance-free reception of radial forces, a geometric over-determination is frequently generated since tolerances are always generated when producing the form-locking elements, wherein the tolerances can lead to alignment errors. Such geometric over-determinations are undesirable and therefore have to be avoided. 
         [0004]    In the citation Symonds, Pat, “Why loose wheels drive us nuts”, in RACE TECH INTERNATIONAL, vol. 17, issue 7 (May 2010), the problem of axis offset between wheel and wheel attachment is described for wheel connections. 
         [0005]    An example for a form-locking connection of this type is illustrated in  FIG. 1 . 
         [0006]      FIG. 1  illustrates a first and a second component  1 ,  2  to be connected with one another which are connected with one another through a bolt  9  with a centering cone  9 ′ (first form-locking element), wherein the bolt is threaded into an attachment borehole  10  in the first component  1 , wherein the centering cone  9  reaches through a borehole  20  with a centering cone  22 ′ (second form-locking element). The bolt  9  which is for example configured as a centering bolt and which contacts with its centering cone  9 ′ at the centering cone  22 ′ of the borehole  20  provides that the two components  1 ,  2  are positioned relative to one another without clearance in axial direction of the bolt  9  and also in radial direction of the bolt  9 . When both components  1 ,  2  shall be additionally connected with one another at another location through a form-locking device which is also capable of receiving forces that extend radially relative to the bolt axis, the entire connection between the two components  1 ,  2  is only defined geometrically when the axis X 1  of the attachment borehole  10  in the first component  1  and the axis X 2  of the borehole  20  in the second component  2  are identical. Due to real world production tolerances, this is typically not the case. In the embodiment of  FIG. 1 , the two axes X 1  and X 2  are offset from one another by the distance Δx. 
         [0007]    It would be possible to perform the second connection between the first and the second component  1 ,  2  to be connected through a screw to be threaded into the borehole  10  of the first component  1  which is for example configured as a threaded borehole, wherein the screw head is supported at the outside of the second component  2  that is on the right in  FIG. 1 , however a threaded connection of this type would preload the first component  1  and the second component  2  only in axial direction of the screw but would not be able to receive any forces that act radially to the axis X 1 . This type of connection facilitates a compensation of axis offset and minor axis angle deviation, however it is not suitable for receiving radial forces. 
         [0008]    The first fixation of the two components  1 ,  2  relative to one another illustrated in an exemplary manner in  FIG. 1  through the screw  9  can also be provided in another manner, for example through rivets. 
         [0009]    An embodiment, wherein the two components are fixated relative to one another through an annular planar notch teething which is configured as a Hirth-teething is illustrated in  FIGS. 8 and 9  and is described in the figure description. The centering of a wheel, for example of a vehicle wheel at a wheel carrier through a planar notch teething and its attachment at the wheel carrier through a central locking device is known from EP 0 928 249 B1. However, the threaded connection disclosed therein is not capable of receiving radial support forces through the nut. 
       BRIEF SUMMARY OF THE INVENTION 
       [0010]    Therefore, it is an object of the present invention to provide a form-locking connection which is configured when fixating the two components to be connected in axial direction of the form-locking elements to receive the radial forces at more than one location without a geometric over-determination of the entire arrangement occurring. 
         [0011]    This object is achieved through a form-locking connection for compensating position errors including a first component; a second component to be connected with the first component; a first circular form-locking element associated with the first component; a second circular form-locking element associated with the second component; and a compensation element provided between the first circular form-locking element and the second circular form-locking element, wherein the circular form-locking elements are fixated with respect to their axial positions and form a form-locking arrangement with the compensation element which form-locking arrangement positions the first component and the second component relative to one another, wherein the first circular form-locking element is provided with a first spherical segment shaped cambered surface on its side oriented towards the second circular form-locking element, wherein a center of curvature of the first spherical segment shaped cambered surface is arranged on an axis of the first circular form-locking element, wherein the second circular form-locking element is provided with a second spherical segment shaped cambered surface on its side oriented towards the first circular form-locking element, wherein a center of curvature of the second spherical segment shaped cambered surface is arranged on an axis of the second circular form-locking element, wherein the compensation element includes a third spherical segment shaped cambered surface whose curvature is adapted to the opposite first spherical segment shaped cambered surface and a fourth spherical segment shaped surface whose curvature is adapted to the opposite second spherical segment shaped cambered surface, wherein the compensation element includes a radial inside with an inner diameter which is provided with the radially inner third spherical segment shaped cambered surface, wherein the compensation element includes a radial outside which is provided with the radially outer fourth spherical segment shaped cambered surface, wherein the radially inner third spherical segment shaped cambered surface of the compensation element contacts the spherical segment shaped cambered surface of the first circular form-locking element in a spherical segment, wherein the radially outer fourth spherical segment shaped cambered surface of the compensation element contacts the spherical segment shaped cambered surface of the second circular form-locking element, wherein the radially inner third spherical segment shaped cambered surface and the radially outer fourth spherical segment shaped cambered surface of the compensation element are surfaces that are oriented away from one another in a radial direction, and wherein a curvature center of the radially inner third spherical segment shaped cambered surface and a curvature center of the radially outer fourth spherical segment shaped cambered surface are offset from one another in axial direction, and wherein the curvature center of the radially inner third spherical segment shaped cambered surface is closer to the compensation element than the curvature center of the radially outer fourth spherical segment shaped cambered surface. 
         [0012]    For this purpose the form-locking connection is provided with a first and a second component to be connected with one another and as a particular feature of the invention includes a first circular form-locking element that is associated with the first component, a second circular form-locking element that is associated with the second component, and a compensating element provided between the first form-locking component and the second form-locking component. The form-locking elements are fixated with respect to their axial positions and form a form-locking arrangement together with the compensating element which positions the first component and the second component relative to one another. A side of the first form-locking component which faces the second form-locking component is provided with a first spherical segment shaped cambered surface whose center point of curvature is disposed on an axis of the first form-locking element. A side of the second form-locking component which faces the first form-locking component is provided with a second spherical segment shaped cambered surface whose center point of curvature is positioned on an axis of the second form-locking component, and wherein the compensating element on the sides thereof oriented away from each other in axial direction, includes a third spherical segment shaped cambered surface and a fourth spherical segment shaped cambered surface, whose curvatures are respectively adapted to the first spherical segment shaped cambered surface and the second spherical segment shaped cambered surface. 
         [0013]    The configuration of the form-locking elements according to the invention and providing the compensation element configured according to the invention provides that position deviations between two form-locking elements can be compensated within a predetermined engineering configuration. These position deviations can thus include a parallel offset of the axes like the axis offset illustrated in  FIG. 1  and also an angular deviation of the two axes relative to one another and can be compensated. 
         [0014]    The form-locking connection according to the invention facilitates avoiding a geometric over determination between the two components to be connected with one another and their connection elements and to simultaneously provide an alignment of both components without clearance in a direction parallel to their contact plane at more than one location. 
         [0015]    Preferably, the first and fourth spherical segment shaped surfaces are cambered convex and the second and the third spherical segment shaped surface are cambered concave. 
         [0016]    In one embodiment of the invention, the first form-locking element can be provided in one opening of the first component and the second form-locking element can be provided in an opening of the second component. Thus, the form-locking is only provided by the compensation element which engages both openings, wherein plural form-locking connections configured according to the invention can be provided for connecting both components. 
         [0017]    Preferably the compensation element is configured as a compensation ring. 
         [0018]    In another embodiment of the invention, the first form-locking element is provided at a bolt device, wherein the bolt device is connected with the first component and fixated with respect to its axial position and extends through a borehole of the second component and the second form-locking element is provided at the borehole of the second component, wherein the second component is clamped between the bolt device and the first component. The bolt device includes at least one radial section at its end oriented away from the first component at a side oriented towards the second component along its circumference. The radial section is provided with a first spherical segment shaped surface on the side oriented towards the second component, wherein the curvature center of the surface is arranged on the axis of the bolt device. The second component is provided with a second spherical segment shaped cambered surface along the circumference of the borehole on the side oriented towards the radial section of the bolt device, wherein the curvature center of the surface is arranged on the axis of the borehole and the compensation element configured as compensation ring is provided between the second component and the radial section of the bolt device. 
         [0019]    In a preferred embodiment of the form-locking connection according to the invention configured as bolt connection, the bolt device is formed by a screw, wherein the screw is threaded into a threaded borehole of the first component, and wherein the radial section is configured at a screw head of the screw. 
         [0020]    As an alternative thereto, the bolt device can be formed by a screw, wherein the screw extends through a borehole of the first component and is threaded into a nut supported at the first component. 
         [0021]    It is also possible that the bolt device is formed by a threaded bolt connected with the first component and a nut threaded onto the threaded bolt, is wherein the radial section is then provided at the nut. 
         [0022]    When the bolt device is configured as a screw or as a nut, the compensation ring can be configured secured against loss, but movable on the screw or at the nut. 
         [0023]    A preferred application of the form-locking connection according to the invention is attaching a wheel at a wheel receiver, in particular when this attachment is configured through a central locking device for the wheel. Thus, the first component is formed by the wheel receiver and the second component is formed by the wheel. This application for attaching a wheel at a wheel receiver is not only implementable as a central locking device, but also when the wheel is attachable through a plurality of centering bolt devices, like for example centering wheel screws or wheel nuts at the wheel receiver. When the respectively self-centering bolt devices are configured as form-locking connections according to the invention, a geometrical over-determination of the wheel attachment is reliably prevented. 
         [0024]    An embodiment in a central locking device of a wheel is advantageous in which for example the wheel receiver includes a central threaded wheel attachment bolt and in which the radial section is for example provided at the nut that is threaded onto the wheel attachment bolt. 
         [0025]    Preferably the wheel receiver is provided with a first annular profile, preferably a planar notch teething like for example a Hirth-teething and the wheel is provided with a second annular profile, preferably a planar notch teething like for example a Hirth-teething, wherein the first and the second annular profile or teething engage one another and center the wheel with respect to the wheel receiver. In this embodiment of a connection between the wheel receiver and the wheel, providing a conventional bolted connection as a central locking device in which a wheel screw or wheel nut contacts the surface of the wheel that is oriented away from the wheel receiver, can have the effect that the bolted connection only transfers axial forces in a direction of the axis of the bolted connection. Radial support forces between the wheel and the bolted connection are thus not supported. Experiments by the inventor have yielded that a wheel attached at a wheel receiver is subjected to dynamic forces which can cause an oscillating movement to be induced at the support location of the bolted connection at the wheel which subjects the bolted connection to a disengagement torque; this means it loads the threaded connection with an unthreading torque which can lead to a disengagement of the bolted connection. In order to be able to support the radial forces of the disengagement torque, it can be useful to provide a connection without clearance between the wheel and the wheel receiver, also in the portion of the bolted connection of the wheel. A connection of this type due to unavoidable production tolerances, however, would lead to a geometrical over-determination of the attachment of the wheel at the wheel receiver. 
         [0026]    The invention improves upon this and provides a bolt connection for the central locking device of the wheel which avoids a geometric over-determination but is capable of supporting radial forces from the wheel also through the wheel attachment bolt at the wheel carrier, wherein the forces occur in static and dynamic operations. 
         [0027]    A preferred embodiment of a screw for a form-locking connection according to the invention provided as a bolted connection is characterized in that the screw head at its side oriented towards the threaded section of the screw is provided with a circular segment shaped convex cambered surface, wherein the curvature center of the surface is provided on the axis of the screw. Preferably the compensation ring is arranged on the screw movable, but so that it is secured against loss. 
         [0028]    A preferred embodiment of a nut for a form-locking device according to the invention configured as a bolt connection is characterized in that the nut is provided at least on one axial face side with a spherical segment shaped convex cambered surface, wherein the center of curvature of the surface is arranged on the axis of the nut. 
         [0029]    An embodiment of a compensation element, in particular a compensation disc or a compensation ring is preferred for a bolt connection according to the invention, wherein the compensation element at both axial faces is provided with one respective spherical segment shaped cambered surface whose respective curvature center is arranged on the axis of the compensation element. When both centers of curvature coincide, only angle compensation is possible, whereas, when both centers of curvature are offset from one another in axial direction, also an axis parallel offset of the two axes can be compensated. Preferably one of the two spherical segment shaped cambered surfaces of the compensation ring is concave, whereas the other of the two spherical segment shaped cambered surfaces of the compensation ring is convex. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0030]    The invention is subsequently described in more detail based on a embodiment with reference to drawing figures, wherein: 
           [0031]      FIG. 1  illustrates a partial sectional view in principle of two components connected with one another without clearance; 
           [0032]      FIG. 2  illustrates a partial sectional view of a first embodiment of the form-locking connection according to the invention, configured as a bolt connection; 
           [0033]      FIG. 3  illustrates a partial sectional view of a bolt connection according to  FIG. 2 , compensating an axle offset; 
           [0034]      FIG. 4  illustrates the partial sectional view of the bolt connection according to  FIG. 2 , compensating an axle angle deviation; 
           [0035]      FIG. 5  illustrates a partial sectional view of a form-locking connection according to the invention, configured as a bolt connection; 
           [0036]      FIG. 6  illustrates a partial sectional view of the second embodiment according to  FIG. 5 , compensating an axle offset; 
           [0037]      FIG. 7  illustrates a compensation ring of the form-locking connection in a longitudinal, sectional view through an axis plane; 
           [0038]      FIG. 8  illustrates a partial sectional view of a third embodiment of the form-locking connection according to the invention, used as a central locking device for a wheel; 
           [0039]      FIG. 9  illustrates the partial sectional view of a third embodiment according to  FIG. 8 , compensating an axle offset; 
           [0040]      FIG. 10  illustrates a planar notch teething according to the embodiment illustrated in  FIGS. 8 and 9 ; 
           [0041]      FIG. 11  illustrates a partial sectional view of a fourth variant of the form-locking connection according to the invention; and 
           [0042]      FIG. 12  illustrates the partial sectional view of a fourth embodiment according to  FIG. 11 , compensating an axle offset. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0043]    In  FIG. 1 , briefly described supra, a pair of boreholes  10 ,  20  is illustrated in a lower portion, wherein the borehole  20  is provided with a conical annular centering surface  22 ′ in its outlet portion oriented away from the first element  1 . In this pair of boreholes  10 ,  20 , the two bore axes X 1  and X 2  are offset from one another by an axis offset Δx, representing an axis misalignment. 
         [0044]    The connection of the two components  1 ,  2  through a form-locking connection configured as a bolt connection through the borehole pair  10 ,  20 , is subsequently described with reference to  FIGS. 2 through 6 . 
         [0045]      FIG. 2  illustrates a connection of the two components  1 ,  2  through a bolt device  3 , configured as a screw  31  in a condition in which there is no position misalignment (for example axle offset and/or axle angle deviation), thus the axes X 1  and X 2  are identical and coincide with the axis X of the bolt device  3 . The bolt connection is not limited to a screw connection; it can also be configured differently, for example as a bayonet connection or as a rivet connection. 
         [0046]    In the illustrated embodiment of this bolt connection, the borehole  10  is configured as a threaded borehole into which the screw  31  is threaded. The screw  31  is provided with a screw head  33  which includes a section  30  at its side oriented towards the thread section  35  threaded into the threaded borehole  10 , wherein the section  30  radially protrudes with respect to the threaded section  35 . This radial section  30  forms a first form-locking element and is thus provided for this purpose with an annular spherical segment shaped convex cambered surface  32 . 
         [0047]    The center point M 1  of the curvature radius R 1  of the first spherical segment shaped cambered surface  32  is disposed on the axis X of the bolt device  3  configured as a screw  31 . Since there is no axis misalignment in the embodiment of  FIG. 2 , the axis X 1  of the threaded borehole  10  which corresponds to the axis X of the screw  31  and the axis X 2  of the borehole  20  are in alignment with one another. 
         [0048]    The annular centering surface in the outlet portion of the borehole  20  of the second component  2  is configured as a second circular form-locking element  21  and is thus provided with a concave cambered spherical segment shaped surface  22 . The center point M 2  of the curvature radius R 2  of the circular segment shaped cambered surface  22  is therefore arranged on the axis X 2  of the borehole  20 . The center points M 1  and M 2  in the embodiment of  FIG. 2  are therefore on a line, but are offset from one another in axial direction. 
         [0049]    The transition between the borehole  20  and the second component  2  and the circular segment shaped surface  22  is configured so that the diameter of the borehole  20  in the portion of the transition of a cylindrical portion  20 ′ oriented to the first component  1  of the borehole  20  initially becomes smaller and then expands along the spherical segment shaped cambered surface  22 . This way, an undercut of the radial innermost end of the spherical segment shaped cambered surface  22 ′ is configured which provides a particularly advantageous pressure distribution on the spherical segment shaped cambered surface  22 . 
         [0050]    A compensation ring  4  is inserted between the convex cambered surface  32  of the screw  31  and the concave cambered surface  22  in the outlet portion of the borehole  20  of the component  2 . Thus, the compensation ring  4  as illustrated in  FIG. 7  is provided at its inner diameter with a spherical segment shaped concave cambered annular surface  40  whose camber is adapted to the camber of the convex cambered surface  32  of the screw  31 . Thus, the concave surface  40  of the compensation ring  4  can contact the convex surface  32  of the screw  31  with a precise fit. 
         [0051]    At its radial outside, the compensation ring  4  is provided with a spherical segment shaped convex cambered surface  42 , whose camber is adapted to the camber of the concave surface  22  in the outlet portion of the borehole  20  of the component  2 . The convex surface  42  of the compensation ring  4  can thus contact the concave surface  22  of component  2  with a precise fit. 
         [0052]    As illustrated in the longitudinal sectional view of the compensation ring  4  in  FIG. 7 , the center point M 1 ′ of the curvature of the cambered surface  40  and the center point M 2 ′ of the cambered surface  42  are both arranged on the axis X 3  of the compensation ring  4 , and thus on the same side of the compensation ring  4 . 
         [0053]    Since the convex cambered surface  32  of the screw  31  and the concave inner surface  40  of the compensation ring  4  are respectively configured spherical segment shaped, the compensation ring  4  can pivot, wherein the respective cambered surfaces remain in contact with one another. The slanted positioning of the compensation ring  4  caused by this pivoting provides that the compensation ring remains in contact with the surface  22  of the component  2  and also with the surface  32  of the screw  31  when there is an axis offset. 
         [0054]    The identical camber radii R 1  and R 1 ′ of the spherical segment shaped cambered surfaces  32  and  40  are smaller than the also identical camber radii R 2  and R 2 ′ of the spherical segment shaped cambered surfaces  22  and  42 . 
         [0055]    The operating mode of the position error compensation of the embodiment illustrated in  FIG. 2  of the bolt connection according to the invention is subsequently illustrated with respect to  FIG. 3 . 
         [0056]    It is evident from  FIG. 3  that the axis X 2  of the borehole  20  of the component  2  is offset downward in parallel with respect to the axis X 1  of the threaded borehole  10  in the component  1  which corresponds to the axis X of the screw  31 . Based on this axial offset, the radial distance a 1  between the outer circumference of the screw  31  and the inner circumference of the borehole  20  of the component  2  at the top side of the screw  31  is smaller in the illustration of  FIG. 3  than the respective radial distance a 2  below the screw. Thus, the compensation ring  4  is pivoted clockwise when threading the screw  31  into the threaded borehole  10  in the sectional view of  FIG. 3  as indicated in a symbolic manner by the arrows W 1  and W 2 . During this pivot movement, the cambered surfaces  40 ,  42  of the compensation ring  4  always remain in surface contact with the respectively associated surface  32  of the screw  31  or the surface  22  of the second component  2 . 
         [0057]    A force F impacting the screw  3   i  in its radial direction from the second component  2  can thus be introduced through the compensation ring  4  into the screw  31  and thus into the first component  1 . 
         [0058]      FIG. 4  illustrates the form-locking connection according to  FIG. 2 , wherein, however, (illustrated in an exaggerated manner) an axis angle deviation of the axis X 1  of the threaded borehole  10  in the component  1  which coincides with the axis X of the screw  31  is compensated with respect to the axis X 2  of the borehole  20  in the component  2 . It is evident from  FIG. 4  that the cambered surface  32  of the screw  31  contacts the cambered surface  40  of the compensation ring  4  in spite of the slanted arrangement of the bolt  31  caused by the axis angle deviation, so that the screw  31  in the portion of its cambered surface  32  along its circumference contacts the compensation ring through surface contact, wherein the compensation ring in turn with its convex cambered radial outer surface  42  contacts the concave cambered surface  22  of the borehole  20  through surface contact, so that the screw  31  along its entire circumference is in indirect contact with the second component  2  through the compensation ring  4 . 
         [0059]    Also for this axis angle deviation, a force F impacting the screw  31  in its radial direction from the second component  2  can be introduced through the compensation ring  4  into the screw  31  and thus into the first component  1 . 
         [0060]      FIGS. 5 and 6  a second embodiment of the present invention is illustrated which corresponds essentially to the first embodiment as illustrated in  FIGS. 2 through 4 . The screw  231  forming the bolt device  203 , however, is provided with a cylindrical shaft section  235  which is only provided with an external thread  236  in the portion of its free end. The cylindrical shaft section  235  is thus inserted through the borehole  220  in the second component  202  into the borehole  210  in the first component  201  which is configured as a cylindrical borehole without interior thread. A nut  237  is threaded onto the free end of the screw  231  provided with the exterior thread  236 , wherein the nut contacts the outer surface  201 ′ of the first component  201  which outer surface is oriented away from the second component  202 . Thus, the components  201  and  202  are clamped through the compensation ring  204  which is supported with its concave surface  242  on the concave surface  222  formed in the edge portion of the borehole  220  which forms the second form-locking element  221  and wherein the concave surface  240  of the compensation ring  204  contacts the convex annular surface  232  at the radial section  230  of the screw head  233  forming the first form-locking element  230 ′. 
         [0061]    Thus, the screw  231  with respect to its configuration corresponds to the screw  31  of the first embodiment as illustrated in  FIGS. 2 and 3 . 
         [0062]    In the second embodiment, the compensation of axis offset and/or axis angle deviation as illustrated in  FIG. 6  is provided in the same manner as illustrated in combination with the first embodiment in  FIG. 3  and in  FIG. 4 . 
         [0063]    A third variant of the bolt connection according to the invention with position error compensation is illustrated in  FIGS. 8 and 9  with reference to an embodiment of a central locking device for a wheel, for example a vehicle wheel. 
         [0064]      FIG. 8  illustrates the wheel  302  in a partial sectional view which wheel is attached at a wheel receiver  301  through a central locking device  300 , forming the bolt device  3  and described infra. 
         [0065]    The wheel receiver  301  is rotatably supported through suitable roller bearings at a non-illustrated wheel carrier in a conventional manner. A central wheel attachment bolt  310  extends centrally and coaxially to the axis X 5  of the wheel receiver  301 . In the portion of its free end, the wheel attachment bolt  310  is provided with an outer thread  311  for receiving a threadable nut  350  including the radial section  330  forming the first form-locking element  330 ′. The second form-locking element  321  is configured at the wheel  302  about the outlet of the pass-through borehole  320  receiving the center wheel attachment bolt  310  and provided with the annular and spherical segment shaped concave cambered surface  322 . Between the nut  350  and the wheel  302 , a compensation ring  304  is arranged in the embodiment of  FIGS. 2 through 4 . 
         [0066]    The configuration of the compensation ring  304  corresponds to the embodiment of the compensation ring  4  illustrated in  FIGS. 2 through 4  and  7 . Accordingly the wheel  302  corresponds to the component  2  of the first embodiment illustrated in  FIGS. 2 through 4 . Also the function of the compensation ring  304  with its convex circular segment shaped surface  342  and concave circular segment shaped surface  340 , which are provided with respective opposite surfaces  322 ,  332  at the wheel  302  or at an annular shoulder  337  of the nut  350  oriented towards the wheel  302 , corresponds to the functionality described with reference to  FIGS. 2 through 4  as illustrated in  FIG. 9 . The center point M 3  of the camber radius R 3  of the circular segment shaped cambered surface  332  is thus arranged on the axis of the nut  350  which essentially coincides in threaded-on condition with the axis X 5  of the wheel attachment bolt  310 . 
         [0067]    The wheel receiver  301  is radially expanded on its side oriented towards the wheel  302  and forms an annular face which extends in an orthogonal manner relative to the axis X 5  of the wheel receiver  301 . The wheel attachment bolt  310  which is not necessarily, but in the illustrated embodiment integrally configured with the wheel receiver  301  axially protrudes from this face. On this annular face, enveloping the wheel attachment bolt  310 , a profile  5  is configured at the side oriented towards the wheel  302 , wherein the profile  5 , for example forms an annular, circular teething of a planar notch teething, wherein the annular teething is arranged in a central and orthogonal manner relative to the rotation axis X 5  of the wheel receiver  301 . This planar notch teething can be configured for example as a Hirth-teething. 
         [0068]    The wheel  302  also includes an annular profile  6  in the portion of the wheel hub on its side oriented towards the wheel receiver, wherein the profile is adapted to the profile  5  of the wheel receiver  301  and can thus also be configured as a planar notch teething, preferably as Hirth-teething. The two profiles  5 ,  6  are configured for engagement with one another. The configuration of the profiles  5 ,  6  is subsequently described with reference to  FIG. 10 . 
         [0069]    In  FIG. 10 , for example two corresponding planar notch teethings are illustrated in perspective as profiles  5 ,  6 , wherein one profile is associated with the wheel  302  and the other profile is associated with the wheel receiver  301 . It is clearly apparent that the teething is formed by triangular profile sections  514 ,  614 , whose longitudinal axes  515 ,  615  intersect in the center line or rotation axis X 5 . The wedge angle α of the profile sections  514 ,  614  is thus constant with respect to the longitudinal axis  515 ,  615 . Certainly also additional profile configurations are conceivable. 
         [0070]    The wedge surfaces  513  of the profile  5  and the wedge surfaces  613  of the profile  6  are configured for mutual surface contact with one another. The profiles  5 ,  6  engage one another in assembled condition of the wheel  302  at the wheel receiver  301 . 
         [0071]    The preload force of the wheel  302  is thus introduced into the wheel receiver  301  through the engaging profiles  5 ,  6 ; this means received by the wedge surfaces  513 ,  613  of the profiles  5 ,  6  for example of the planar notch teething so that the wheel  302  is force positioned and fixated through the wedge shaped guide- and support surfaces into a position that is defined with respect to three coordinates in space and which is aligned with the wheel receiver  301  with respect to the rotation axis X 5 . 
         [0072]    Through the two profiles  5 ,  6  that are in engagement with one another, the wheel loads which are symbolically illustrated through arrows F′ and also brake and drive moments which are symbolized through the double arrow MM are transmitted between the wheel receiver  301  and the wheel  302 . 
         [0073]    Though the wheel  302  is fixated in three directions in space with respect to the rotation axis X 5  of the wheel receiver  301  through the profiles  5 , 6  that are in engagement with one another, pivot torques which are caused for example through transversal forces F″ impacting the contact surface of the wheel  302 , wherein the transversal forces impact parallel to the rotation axis X 5  and at a lateral distance thereto, can cause the wedged surfaces  513 ,  613  to disengage the profiles  5 ,  6  from their mutual contact. The inventor has found in the prior art that this does not only lead to a wear of the surfaces in the portion of the profiles  5 ,  6 , but that it can also lead to the wheel  302  disengaging from the nut  350  fixating it at the wheel receiver  301 . In order to prevent this, the invention provides using a support of radial forces in the portion of the nut  350  of the central locking device  300  in addition to supporting the forces through the profiles  5 ,  6  engaging one another, without a geometric over determination of the attachment of the wheel  302  at the wheel receiver  301  occurring. This is also facilitated by the arrangement illustrated in  FIGS. 8 and 9  including the compensation ring  304  and the wheel nut  350 . 
         [0074]    In the illustration of  FIG. 9 , there is an axis offset between the axis X 5  of the wheel attachment bolt  310  and the axis X 6  of the pass-through borehole  320  in the center of the wheel  302 . The center point M 4  of the curvature radius R 4  of the concave cambered surface  322  of the wheel  302  is therefore on the wheel axis X 6 . 
         [0075]    Since the wheel  302  is already geometrically fixated through the engaging profiles  5 ,  6  with respect to the wheel receiver  301 , the compensation ring  304  has to pivot clockwise as illustrated in the embodiment of  FIG. 3  and as symbolized by the arrow V in order to cause form-locking between the wheel  302 , the compensation ring  304  and the nut  350  when the nut  350  is threaded onto the wheel attachment bolt  310 . 
         [0076]    This attachment of a wheel  302  at a wheel receiver  301  facilitates introducing radial components of forces that impact the wheel  302  in static and in dynamic condition through the engaging profiles  5 ,  6  and also through the compensation ring  304  and the nut  350  into the wheel receiver  301  as indicated by the arrows F 1  and F 2 . Thus, the connection of the two engaging profiles  5 ,  6  is unloaded from moments which can lead in a conventional central threaded attachment of the wheel  302  to a lift-off of the profile teeth described supra and to a wear and disengagement of the wheel attachment caused thereby. 
         [0077]    Also an axis angle deviation in which the axis X 5  of the wheel attachment bolt  310  and the axis X 6  of the pass-through borehole  320  are at an angle relative to one another is compensated like in the embodiment of  FIG. 4 . 
         [0078]    Another application of a form-locking connection according to the invention for compensating positioning errors, (for example axis offset and/or axis angle deviation) is illustrated in  FIGS. 11 and 12 . 
         [0079]    The two components  401  and  402  to be connected with one another are thus arranged on top of one another and are held against one another through impact of external forces, like for example gravity G and a support force F G . Their faces  401 ′ and  402 ′ that are oriented towards one another contact one another. In practical applications, the first component  401  can be formed for example by a bridge and the second component  402  can be formed by a bridge bearing. 
         [0080]    The second component  402  is provided at its top side with a circular recess  420  which is provided with an annular spherical segment shaped cambered concave surface  422  in a portion of its outlet edge oriented towards the first component  401 , wherein the outlet edge forms the second form-locking element  421 ′. At the base of the recess  420 , a dead hole section  421  is provided. The diameter of the dead hole section  421  is greater than the radially inner edge  422 ′ of the circular segment shaped cambered concave surface  422 , so that the dead hole section  421  like in embodiment of  FIG. 2 through 4  forms an undercut of the radially inner edge  422 ′, forming an unloading groove. 
         [0081]    The first portion  401  is provided with a pass-through borehole  410 . In case of the ideal alignment of the two components  401  and  402  relative to one another, the axis Y 1  of the pass-through borehole  410  and the axis Y 2  of the circular recess  420  coincide as evident from  FIG. 11 . 
         [0082]    An annular compensation element  402  is inserted into the recess  420 , wherein the compensation element  404  is configured on an outside like the compensation element  4  illustrated in  FIG. 7  and is configured analogous thereto with a radially outer convex cambered annular surface  442  and a radially inner convex cambered annular surface  440 . The compensation element engages the recess  420 . Thus, the larger diameter convex cambered annular surface  442  of the compensation element  404  contacts the spherical segment shaped cambered concave surface  422  in the portion of the outlet  420  in the second component  402 . 
         [0083]    A cylindrical insert  430  is inserted with a precise fit into the pass-through borehole  410 , wherein the insert is received substantially without clearance in radial direction, but movable in axial direction in a direction of the borehole axis Y 1  in the pass-through borehole  410 . The pass-through borehole  410  is provided with an inner thread section  411  in its end portion oriented away from the second component  402 , wherein a clamping screw  412  is threaded into the inner thread section. The clamping screw  412  facilitates clamping the insert  430  against the compensation element  404 . 
         [0084]    The insert  430  includes an annular axial shoulder  431  at its bottom side oriented towards the second component  402 , wherein the shoulder forms the first form-locking element  430 ′ and which is provided with a circular segment shaped cambered convex surface  432  at its section oriented towards the second component  402 , wherein the surface  432  engages the annular compensation element  404  and is configured to contact its concave annular surface  440 . When the insert  430  is clamped against the compensation element  404  the spherical segment shaped cambered convex surface  432  of the insert  430  is applied against the radially inner concave annular surface  440  of the compensation element  404 . 
         [0085]    The function of this embodiment of the form-locking connection according to the invention is subsequently described with reference to  FIG. 12 . 
         [0086]    When the two components  1  and  2  are laterally moved relative to one another the axis Y 1  of the pass-through borehole  410  in the first component  401  and the axis Y 2  of the circular recess  420  in the second component  402  are not in alignment with one another, but are laterally offset from one another as illustrated in  FIG. 12 . Initially the clamping screw  412  is disengaged so that the insert  430  is movable along the axis Y 1 . When the insert  430  is moved through the clamping screw  410  against the compensation element  404 , the compensation element  404  moves into a slanted position during increasing tightening of the clamping screw  412  due to the axis offset between the axes Y 1  and Y 2  until the spherical segment shaped cambered surface  440  of the compensation element  404  and the spherical segment shaped cambered surface  432  of the insert  430  contact one another. The circumferential face edges of the compensation element  404  that are oriented away from one another in axial direction thus partially penetrate the cavities formed in the borehole  410  and in the dead hole section  421 . Together with the circular segment shaped cambered surfaces  422  of the second component  402  and  442  of the compensation element  404  contacting one another, a form-locking connection between the first component  401  and the second component  402  is provided, wherein the insert  430  substantially has no radial clearance in the pass-through borehole  410 , wherein transversal forces F 0  and F 0 ′ are transferrable through the form-locking connection. 
         [0087]    The invention is not limited to the embodiments described supra which are only intended to illustrate the core idea of the invention in general. The scope of the device according to the invention also extends to other embodiments in addition to the embodiments described supra. The invention can thus in particular have features which represent a combination of the respective particular features of the patent claims. 
         [0088]    Reference numerals in the patent claims, the description and the drawings shall only help to illustrate the invention and do not limit the scope of the invention.