Toothed belt shaft for providing linear movement of slider

Abstract

The invention relates to a toothed belt shaft (1) for providing a linear movement of a slide (3), comprising a profile body (2) extending along a movement axis (5) and a slide (3) mounted on the profile body so as to be linearly movable along the movement axis, comprising a toothed belt pulley and a deflection roller, and comprising a toothed belt, the toothed belt is partially wound around the toothed belt wheel and the deflection roller and is connected to the slide block, the toothed belt wheel is accommodated in a first bearing housing (8) in a rotatable manner, and the first bearing housing is fixed on a first axial end face (12) of the profile body through at least one fixing device (10). Wherein the slide has a first slide centering interface (38), and the first bearing housing (8) has a first bearing housing centering interface (39) opposite the first slide centering interface (38) along the movement axis, which first bearing housing centering interface is designed for the orientation of the first bearing housing relative to the slide.

Description

Technical Field

[0001] The present invention relates to a toothed belt shaft for providing linear movement of a slider, wherein the toothed belt shaft has a profile body extending along a movement axis and a slider supported on the profile body in a manner that allows linear movement along the movement axis, a toothed belt pulley and a deflection roller, and a toothed belt, wherein the toothed belt is partially wound around the toothed belt pulley and the deflection roller and is connected to the slider, wherein the toothed belt pulley is rotatably received in a first bearing housing, and the first bearing housing is fixed to a first axial end face of the profile body by at least one fixing device. Background Art

[0002] Linear guides are known from the prior art in which, for particularly precise guidance of a linear movement, a slide is mounted linearly movably on a base structure in that two first guide modules are movably supported on a first guide surface of the base structure and two second guide modules are movably supported on a second guide surface of the base structure.

[0003] If such a linear guide is designed as a toothed belt shaft, it is necessary that the toothed belt is guided without deflection in a first spatial direction transverse to the axis of movement and preferably in a further spatial direction transverse to the axis of movement and orthogonal to the first spatial direction when the toothed belt shaft is fully assembled. This prevents the toothed belt from coming into contact with the profile body, toothed belt wheels or deflection rollers and being damaged. The non-deflection guidance also prevents the slide from tilting in the profile body.

[0004] In the sense of the present application, a movement axis which can also be referred to as the z-axis, a transverse axis which can also be referred to as the y-axis (along which the first spatial direction or another spatial direction extends), and a height axis which can also be referred to as the x-axis (along which the first spatial direction or another spatial direction extends) define a Cartesian coordinate system, to which reference is made below unless explicitly stated otherwise. Summary of the invention

[0005] It is therefore an object of the present invention to prevent or reduce a deflection in a first spatial direction and / or in a further spatial direction.

[0006] To solve this problem, according to the present invention, in combination with the features mentioned at the beginning, it is provided that the slider has a first slider centering interface, and the first bearing housing has a first bearing housing centering interface opposite to the first slider centering interface along the axis of movement, and the first bearing housing centering interface is constructed to orient the first bearing housing for translation relative to the slider along a first spatial direction transverse to the axis of movement and for orienting the first bearing housing for rotation relative to the slider around the axis of movement.

[0007] In this way, there is an advantageous possibility that during the installation of the toothed belt shaft, the first bearing housing is oriented translationally relative to the slide along a first spatial direction transverse to the axis of motion and rotationally relative to the axis of motion, for which purpose during the installation the first slide centering interface of the slide is connected to the first bearing housing centering interface of the first bearing housing. The first bearing housing is thus oriented relative to the slide as described above, wherein this aspect can also be referred to as centering. Subsequently, the first bearing housing is fixed to the first axial end face of the profile body by means of a fixing device. Thus, the first bearing housing can advantageously be oriented directly relative to the slide.

[0008] In this context, "orientation in translation along a first spatial direction" means that a movement of the first bearing shell along this first spatial direction is prevented. With the orientation of the first bearing shell relative to the rotation of the slide about the axis of movement, a possible tilting of the first bearing shell relative to the slide due to a rotation about one or more axes of the coordinate system is prevented.

[0009] Here, the axis along which the slide of the toothed belt shaft can be linearly moved is referred to as the movement axis. This axis does not necessarily coincide with the body axis of a component of the toothed belt shaft, such as the profile body or the first bearing housing.

[0010] The first spatial direction transversely to the axis of movement is preferably a direction along the transverse axis, since a deviation along the height axis can be at least partially compensated by the toothed belt.

[0011] Compared to conventional toothed belt shafts, in which the first bearing shell is only aligned relative to the profile body during installation and is therefore only indirectly aligned relative to the slide, a more precise alignment can be achieved with direct alignment of the first bearing shell relative to the slide, wherein a deviation of the toothed belt is largely avoided. This is due to the fact that the tolerance chain present in the indirect alignment, in which both the tolerances between the first bearing shell and the profile body and the slide influence the alignment, is avoided and only the tolerances between the first bearing shell and the slide influence the alignment.

[0012] Advantageous developments of the invention are apparent from the dependent claims.

[0013] In another embodiment of the toothed belt shaft, the first slider centering interface has a first centering element and the first bearing housing centering interface has a second centering element, wherein at least the center axis of the first centering element and the center axis of the second centering element are oriented parallel to the axis of movement, in particular parallel to the axis of movement and coaxially to each other. The first centering element and the second centering element allow the connection of the first slider centering interface and the first bearing housing centering interface. The first centering element and the second centering element can be made corresponding to each other, in particular in the form of a plug connection, so that the first centering element is at least partially received in the second centering element, for example. As an alternative, the first centering element and the second centering element can be made identically, wherein a centering aid, for example in the form of a locating pin or a locating sleeve, is then used when assembling the toothed belt shaft, by means of which the first centering element and the second centering element and thus the first slider centering interface and the first bearing housing centering interface are indirectly connected to each other. Subsequently, the first bearing housing can be fixed and the centering aid can be removed.

[0014] In the present application, the term "element" refers not only to an element that protrudes relative to a surface on which it is constructed, for example in the form of a pin, but also to an element that extends from a surface as a recess into the relevant body, for example in the form of a bore.

[0015] Preferably, the first and / or second centering element is designed in the form of a pin, in particular in the form of a cylindrical pin. The pin-shaped design allows for precise production of the first and second centering elements and the use of a centering aid designed as a centering sleeve during assembly of the toothed belt shaft. However, it is also possible to design only the first centering element, for example, in the form of a cylindrical pin, whereby a cylindrical bore in the first bearing housing corresponding to the first centering element can be used as the second centering element. In this case, the use of a centering aid is omitted.

[0016] In another embodiment, the first centering element and / or the second centering element are configured as a spherical segment, in particular a spherical segment. If both the first centering element and the second centering element are configured as a spherical segment, the centering sleeve is used again as a centering aid for assembly. If the first opening of the centering sleeve is brought into contact with the first centering element of the first slider centering interface or the second opening of the centering sleeve is brought into contact with the second centering element of the first bearing housing centering interface along the axis of movement during assembly or orientation, the edge of the centering sleeve that radially defines the first opening slides on the spherical surface of the first centering element or the edge of the centering sleeve that radially defines the second opening slides on the spherical surface of the second centering element, so that self-centering of the first centering element and the second centering element or the centering sleeve occurs. It is also conceivable that the first centering element and the second centering element are correspondingly made, so that, for example, the first centering element is configured as a spherical segment protruding relative to the surface of the slider and the second centering element is configured as a spherical segment-shaped recess for partially accommodating the first centering element.

[0017] As an alternative, the first centering element is designed as a stepped surface element and the second centering element is designed as a stepped surface element corresponding to the first centering element, wherein at least one center plane of the first centering element, which includes the center line of the first centering element, and a center plane of the second centering element, which includes the center line of the second centering element, are oriented parallel to one another. Due to the stepped design and the resulting parallel orientation of the center plane of the first centering element and the center plane of the second centering element relative to one another, a completely rotational orientation of the first bearing housing relative to the sliding block is achieved, wherein neither a rotation about the axis of movement nor a rotation about the center line of the first centering element or about the center line of the second centering element is possible.

[0018] In a preferred design, the first centering element and / or the second centering element is constructed as a recess extending along the axis of movement, wherein at least the center axis of the first centering element and the center axis of the second centering element are parallel to the axis of movement, in particular parallel to the axis of movement and coaxially oriented with respect to each other. Thus, for example, a locating pin can be used as a centering aid. It is also conceivable that the cross-section of the first centering element constructed as a recess and / or the cross-section of the second centering element constructed as a recess decreases from the opening of the recess along the direction of movement toward the bottom of the recess. Thus, the corresponding recess tapers from its opening to its bottom, whereby the larger cross-section in the area of ​​the opening allows easy insertion of the centering aid and the tapering feature achieves self-centering.

[0019] Preferably, the first slide centering interface and / or the first bearing housing centering interface has a further centering element which is spaced apart from the first centering element and / or the second centering element in a spatial direction transverse to the axis of movement, in particular is designed identically to the first centering element and / or the second centering element, and is arranged for translational orientation of the first bearing housing relative to the slide in a further spatial direction transverse to the axis of movement, wherein the further spatial direction runs orthogonally to the first spatial direction. By means of the further centering element, the first bearing housing can be completely oriented by means of translational orientation in the further spatial direction and complete rotational fixation.

[0020] Advantageously, the first centering element of the first slide centering interface has a greater extension in the direction of movement than the other centering element of the first slide centering interface and / or the second centering element of the first bearing housing centering interface has a greater extension in the direction of movement than the other centering element of the first bearing housing centering interface. Thus, for example, during assembly, the first slide centering interface and the first bearing housing centering interface can first be connected only via the first centering element and the second centering element, so that at least a rotation around the center axis of the first centering element or around the center axis of the second centering element is possible. If during assembly, the first bearing housing is further transferred to the slide along the axis of movement, the other centering element of the first slide centering interface can be engaged with the other centering element of the first bearing housing centering interface in order to achieve a complete orientation. This procedure facilitates assembly, in particular when assembly is carried out manually.

[0021] An embodiment is considered particularly advantageous in which the second bearing housing is fixed by at least one fixing means to a second axial end face of the profile body opposite the first axial end face, the deflecting roller being rotatably supported in the second bearing housing, the slide having a second slide centering interface spaced apart from the first slide centering interface along the axis of movement, and the second bearing housing having a second bearing housing centering interface opposite the second slide centering interface along the axis of movement, in particular designed identically to the first bearing housing centering interface, the second bearing housing centering interface being designed for translatory orientation of the second bearing housing relative to the slide along a first spatial direction transverse to the axis of movement and for rotatable orientation of the second bearing housing relative to the slide about the axis of movement, wherein the deflecting roller is rotatably received in the second bearing housing. Accordingly, the second bearing housing can also be oriented relative to the slide as described above.

[0022] The above-mentioned object is also achieved by a method for centering a bearing housing of a toothed belt shaft. The method comprises the following steps: moving a slide supported on a profile body extending in a movement direction into a first installation position in the movement direction; positioning a first bearing housing that can be fixed to an axial end face of the profile body by at least one fixing element in a fixed position; connecting a first slide centering interface of the slide with a first bearing housing centering interface of the first bearing housing for translatory orientation of the first bearing housing relative to the slide in a first spatial direction transverse to the movement axis and for rotational orientation of the first bearing housing relative to the slide about the movement axis, wherein the center axis of the first centering element of the first slide centering interface and the center axis of the second centering element of the first bearing housing centering interface are oriented parallel to the movement axis, in particular parallel to the movement axis and coaxially with each other.

[0023] Instead of a toothed belt, other traction means such as, for example, a V-belt or a link chain can also be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The invention is explained in more detail below with reference to the accompanying drawings and is shown in the drawings as follows:

[0025] Figure 1 A preferred structural form of a toothed belt shaft according to the invention is shown in a perspective view, which comprises a slide which is mounted linearly displaceably on a profile body and a transmission unit with a first bearing housing and a second bearing housing,

[0026] Figure 2 Shown in perspective Figure 1 The profile body and slider in

[0027] Figure 3 Shows Figure 1 Front view of the linear guide mechanism in

[0028] Figure 4 The perspective view shows an exploded view of the slide, the first bearing housing and the second bearing housing of the transmission unit,

[0029] Figure 5 The toothed belt shaft with the profile body, the slide and the transmission unit is shown in a top view in section. DETAILED DESCRIPTION

[0030] exist Figure 1 2 shows a first embodiment of a toothed belt shaft 1 having a profile body 2, a slide 3 and a transmission unit 4.

[0031] The movement axis 5, along which the slide 3 is to be moved linearly, coincides with the longitudinal direction of the toothed belt axis 1. The transverse axis 6 runs perpendicular to the movement axis 5, with which the transverse direction of the toothed belt axis 1 coincides. Finally, the height axis 7 is oriented orthogonally to the movement axis 5 and orthogonally to the transverse axis 6, with which the height direction of the toothed belt axis 1 coincides. The movement axis 5, the transverse axis 6 and the height axis 7 form a Cartesian coordinate system.

[0032] In the illustrated embodiment, the transmission unit 4 has a first bearing housing 8 and a second bearing housing 11, wherein the first bearing housing is fixed to a first axial end face 9 of the profile body 2, for example, by means of a plurality of fixing elements 10, in particular machine bolts, and the second bearing housing is fixed to a second axial end face 12 of the profile body 2 by means of a plurality of fixing elements (not shown).

[0033] As components not visible in the figure, the transmission unit 4 has a toothed belt pulley rotatably received in the first bearing housing 8, a deflection roller rotatably received in the second bearing housing 11, and a toothed belt, which is partially wound around the toothed belt pulley and the deflection roller and is connected to the slide 3. In order to move the slide 3, the toothed belt pulley can be connected to a motor (not shown), in particular an electric motor, received on the first bearing housing 8. The toothed belt is exemplarily designed as a continuous belt, but can also have an alternative design.

[0034] As in Figure 2 in and especially in Figure 3 As can be seen in the figure, the profile body 2 has a base body 13 with a longitudinal direction extending along the movement direction 5, from which a first leg 14 and a second leg 15 extend along the height axis 7, which are spaced relative to each other along the transverse axis 6. The base body 13 shown has a profiled recess 57 extending through the entire base body 13. The base body 13, the first leg 14 and the second leg 15 form a substantially U-shaped cross section, which is constant over the entire extension of the profile body 2 along the movement axis 5, as in particular in Figure 3. In addition, the profile body 2 has a first outer side 16, a second outer side 17, a first inner side 18 and a second inner side 19 opposite the first inner side 18. Therefore, the base body 13 together with the first inner side 18 and the second inner side 19 forms a groove-shaped receiving chamber 20, which extends along the movement direction 5 over the entire extension of the profile body 2. In the assembled state, the slide 3 and the toothed belt are partially received in the receiving chamber 20, so that the slide 3 can be linearly moved in the receiving chamber 20 along the movement axis 5. Along the height axis 7, the receiving chamber 20 is delimited by two overhangs 21, 22, wherein the two overhangs 21, 22 are configured at the end of the first leg 14 opposite the base body 13 and at the end of the second leg 15 opposite the base body 13. In order to prevent the slide 3 from moving in the height direction, the slide 3 is designed so that it has height recesses 25, 26 on the first slide outer side 23 and the second slide outer side 24, respectively, which correspond to the overhangs 21, 22 of the profile body 2 in their position along the height axis 7 in the assembled state.

[0035] The illustrated slide 3 has a guide unit 27 having a first guide module 28 arranged on the slide 3 and a second guide module 29 arranged on the slide 3 and spaced apart from the first guide module 28 along the transverse axis 6. In order to connect the slide 3 to the toothed belt, a toothed belt receiving area 31 arranged in a central recess 30 of the slide 3 is provided.

[0036] The first guide module 28 and the second guide module 29 are configured as recirculating ball guide modules in the embodiment shown, and the recirculating ball guide modules each have a plurality of rolling bearing elements (not shown) arranged side by side and received in two channels stacked one above the other along the height axis 7. Here, the rolling bearing elements are made as spheres, but in other embodiments they can have other suitable geometric shapes. It is also conceivable that the first guide module 28 and the second guide module 29 are made as other types of rolling guide modules or sliding guide modules.

[0037] In order to accurately guide the linear movement of the slide 3 along the movement axis 5, a first guide surface 32 is provided on the first inner side surface 9 and a second guide surface 33 is provided on the second inner side surface 10, so that the slide 3 can be supported on the profile body 2 in a linearly movable manner along the movement axis 5, in that the rolling bearing element of the first guide module 28 can be movably abutted against the first guide surface 32 and the rolling bearing element of the second guide module 29 can be movably abutted against the second guide surface 33. During the linear movement, the rolling bearing element of the first guide module 28 moves along the first guide surface 32 and the rolling bearing element of the second guide module 29 moves along the second guide surface 33, wherein the slide 3 is supported in the transverse direction relative to the profile body 2 by the contact between the rolling bearing element of the first guide module 28 and the first guide surface 32 and the contact between the rolling bearing element of the second guide module 29 and the second guide surface 33, thereby enabling accurate linear movement of the slide 3.

[0038] As in Figure 3 As can be seen in the figure, the first guide surface 32 is constructed on the first guide rail 34, and the second guide surface 33 is constructed on the second guide rail 35, wherein the first guide rail and the second guide rail are constructed as separate components in the illustrated embodiment, wherein the first guide rail 34 and the second guide rail 35 are constructed as profiles extending in the longitudinal direction and having a constant cross-section.

[0039] The first guide rail 34 is received in a first receiving groove 36 in the first inner side 9, and the second guide rail 35 is received in a second receiving groove 37 in the second inner side 10, wherein the first receiving groove 36 and the second receiving groove 37 are each formed in an area adjacent to the base body 13. Figure 3 In the embodiment shown, the dimensions of the first guide rail 34 and the second guide rail 35 as well as the first receiving groove 36 and the second receiving groove 37 are selected so that a friction-locking connection is respectively present. As an alternative, a friction-locking and integrally bonded connection or an integrally bonded connection is also conceivable.

[0040] In order to orient the first bearing housing 11 relative to the slide 3 in a first spatial direction transverse to the movement axis 5, for example along the transverse axis 6, in a translational manner, and in order to orient the first bearing housing 11 relative to the slide 3 in a rotational manner about the movement axis 5, as in Figures 3 to 5 As can be seen in the figure, the slide 3 has a first slide centering interface 38 arranged for the aforementioned translational and rotational orientation, and the first bearing housing 11 has a first bearing housing centering interface 39 which is opposite to the first slide centering interface 38 along the movement axis 5 and is arranged for the aforementioned translational and rotational orientation.

[0041] Unless otherwise stated, the orientation of the first bearing shell 11 relative to the slide 3 in a translational direction transverse to the movement axis 5 and the orientation of the first bearing shell 11 relative to the slide 3 in a rotational direction about the movement axis 5 are referred to below as orientation. This applies analogously to the corresponding orientation of the second bearing shell 12.

[0042] In the embodiment described, the first slide centering interface 38 has a first centering element 40 and the first bearing housing centering interface 39 has a second centering element 41, which are designed as recesses extending along the movement axis 5. In the centered or oriented state shown, a first center axis 42 of the first centering element 40 and a center axis 43 of the second centering element 41 are oriented parallel to the movement axis 5 and coaxially with one another. Chamfers 44, 45 are respectively formed at the opening of the first centering element 40 and at the opening of the second centering element 41. For the most precise orientation possible, the center axis 42 of the first centering element 40 runs essentially at right angles to the first end face 46 of the slide 3 and the center axis 43 of the second centering element 41 runs essentially at right angles to the profile-side end face 47 of the first bearing housing 8.

[0043] The first slide centering interface 38 has, by way of example, a further centering element 48 spaced apart from the first centering element 40 along the transverse axis 6, and the first bearing housing centering interface 39 has a further centering element 49 spaced apart from the second centering element 41 along the transverse axis 6, which are here respectively designed identically to the first centering element 40 and the second centering element 40. In this way, a translational orientation of the first bearing housing 11 relative to the slide 3 along a further spatial direction transverse to the axis of movement 5 is achieved, wherein the further spatial direction is orthogonal to the first spatial direction and here extends along the height axis 7.

[0044] In a similar manner, the slider 3 has a second slider centering interface 50 separated from the first slider centering interface 38 along the movement axis 5, and the second bearing housing 11 has a second bearing housing centering interface 51 opposite the second slider centering interface 50 along the movement axis 5 and constructed identically to the first bearing housing centering interface 38, these centering interfaces are constructed for translatively orienting the second bearing housing 12 relative to the slider 3 along a first spatial direction transverse to the movement axis 5 and for rotationally orienting the second bearing housing 12 relative to the slider 3 around the movement axis 5.

[0045] The second slide centering interface 50 and the second bearing housing centering interface 51 are designed, for example, identically to the first slide centering interface 38 or identically to the first bearing housing centering interface 39. The second slide centering interface 50 has a first centering element 40 and the second bearing housing centering interface 51 has a second centering element 41, which are designed as recesses extending along the axis of movement 5. In the centered or oriented state shown, the first center axis 42 of the first centering element 40 and the center axis 43 of the second centering element 41 are oriented parallel to the axis of movement 5 and coaxially to one another. Chamfers 44, 45 are respectively formed at the opening of the first centering element 40 and at the opening of the second centering element 41. For the most precise orientation possible, the center axis 42 of the first centering element 40 runs essentially at right angles to the second end face 52 of the slide 3 and the center axis 43 of the second centering element 41 runs essentially at right angles to the profile-side end face 53 of the second bearing housing 11.

[0046] In order to orient the first bearing housing 11 relative to the slide 3, the slide 3 supported on the profile body 2 is moved along the movement direction 5 into the first installation position ( Figure 5 ), and the first bearing housing 11 is positioned in a first fixed position at the first axial end face 9. Subsequently, the first slide centering interface 38 of the slide 3 is connected to the first bearing housing centering interface 39 of the first bearing housing 11, wherein the center axis 42 of the first centering element 40 of the first slide centering interface 38 and the center axis 43 of the second centering element 41 of the first bearing housing centering interface 39 are oriented parallel to the movement axis 5 and coaxially with each other. After the orientation is completed, the first bearing housing 11 can be fixed to the first axial end face 9 of the profile body 2 by means of the fixing element 10.

[0047] In order to orient the second bearing housing 12 relative to the slide 3, the slide 3 is pushed into the second installation position along the movement axis 5, and the second bearing housing 12 is positioned in the second fixing position on the second axial end face 12. The second slide centering interface 50 of the slide 3 is now connected to the second bearing housing centering interface 51 of the second bearing housing 12, wherein the center axis 42 of the first centering element 40 of the second slide centering interface 50 and the center axis 43 of the second centering element 41 of the second bearing housing centering interface 51 are oriented parallel to the movement axis 5 and coaxially with each other. After the orientation is completed, the second bearing housing 11 can be fixed to the second axial end face 12 of the profile body by means of the fixing element 10.

[0048] As especially in Figure 4 and 5As shown in the embodiment shown, a centering device 54 is used to connect the first slide centering interface 38 of the slide 3 with the first bearing housing centering interface 39 of the first bearing housing 11, which is partially received in the first centering element 42 and the second centering element 43 for orientation. These centering devices can be made as individual positioning pins. As an alternative, a centering gauge 55 ( Figure 4 ), on which two centering means 54 spaced apart from one another in the spatial direction are arranged and which has a retaining section 56 which can be retained or clamped in a corresponding device, for example.

[0049] In an alternative embodiment of the toothed belt shaft 1, which is not shown, the first centering element 40 and / or the second centering element 41 can be pin-shaped, in particular cylindrical pin-shaped, or can be configured as a spherical segment, in particular as a spherical segment. Here, it is possible that the first centering element 40 and the second centering element 41 are made identically or correspondingly to each other. If the first centering element 40 and the second centering element 41 are identical, a centering device is used for alignment, which is configured correspondingly to the first centering element 40 and the second centering element 41, so that either the first centering element 40 and the second centering element 41 are partially received in the centering device, or the centering device is correspondingly partially received in the first centering element 40 and the second centering element 41.

[0050] If the first centering element 40 and the second centering element 41 are designed to correspond to each other, the use of centering means can be omitted. An example for a corresponding design is the design of the first centering element 40 as a cylindrical pin which is partially received in the second centering element 41 designed as a cylinder bore.

[0051] In another alternative design, the first centering element 40 can be constructed as a stepped surface element, and the second centering element 41 can be constructed in a stepped manner as a surface element corresponding to the first centering element, wherein at least a center plane of the first centering element 40 including a center line 42 of the first centering element 40 and a center plane of the second centering element 41 including a center line 43 of the second centering element 41 are oriented parallel to each other.

Claims

1. A toothed belt shaft (1) for providing a linear motion of a slider (3), The invention relates to a profile body (2) extending along a movement axis (5) and a slider (3) supported on the profile body (2) in a manner that allows linear movement along the movement axis (5), a toothed belt pulley and a deflection roller, and a toothed belt, wherein the toothed belt is partially wound around the toothed belt pulley and the deflection roller and is connected to the slider (3), wherein the toothed belt pulley is received in a first bearing housing (8) in a rotationally movable manner, the first bearing housing is fixed to a first axial end face (9) of the profile body (2) by at least one fixing device (10), wherein the slider (3) has a first slider centering interface (38) and the first bearing housing (8) has a first bearing housing centering interface (38) opposite to the first slider centering interface (38) along the movement axis (5), the first bearing housing centering interface being constructed to orient the first bearing housing (8) translationally relative to the slider (3) along a first spatial direction transverse to the movement axis (5) and to orient the first bearing housing (8) rotationally relative to the slider (3) about the movement axis (5).

2. The toothed belt shaft according to claim 1, characterized in that: The first slide centering interface (38) has a first centering element (40) and the first bearing housing centering interface (39) has a second centering element (41), wherein at least a center axis (42) of the first centering element (40) and a center axis (43) of the second centering element (41) are parallel to the movement axis (5), in particular parallel to the movement axis (5) and are oriented coaxially with each other.

3. The toothed belt shaft according to claim 2, characterized in that: The first centering element (40) and / or the second centering element (41) are designed in the form of a pin, in particular in the form of a cylindrical pin.

4. The toothed belt shaft according to claim 2, characterized in that: The first centering element (40) and / or the second centering element (41) is / are configured in the form of a spherical segment, in particular in the form of a spherical segment.

5. The toothed belt shaft according to claim 2, characterized in that: The first centering element (40) is constructed as a stepped surface element, and the second centering element (41) is constructed as a stepped surface element corresponding to the first centering element (40), wherein at least one center plane of the first centering element (40) including a center line (42) of the first centering element (40) and a center plane of the second centering element (41) including a center line (43) of the second centering element (41) are oriented parallel to each other.

6. The toothed belt shaft according to any one of claims 2 to 5, characterized in that The first centering element (40) and / or the second centering element (41) are configured as recesses extending along the movement axis (5), wherein at least the center axis (42) of the first centering element (40) and the center axis (43) of the second centering element (41) are oriented parallel to the movement axis (5), in particular parallel to the movement axis (5) and coaxially with each other.

7. The toothed belt shaft according to any one of claims 2 to 6, characterized in that The first slider centering interface (38) and / or the first bearing housing centering interface (39) has another centering element (48, 49) which is separated from the first centering element (40) and / or the second centering element (41) along a spatial direction transverse to the movement axis (5), and in particular is constructed identically to the first centering element (40) and / or the second centering element (41), and the other centering element is arranged to orient the first bearing housing (8) relative to the slider (3) along another spatial direction transverse to the movement axis (5), wherein the other spatial direction extends orthogonally to the first spatial direction.

8. The toothed belt shaft according to any one of claims 2 to 7, characterized in that The first centering element (40) of the first slider centering interface (38) has a larger extension along the movement direction (5) than another centering element (48) of the first slider centering interface (38), and / or the second centering element (41) of the first bearing housing centering interface (39) has a larger extension along the movement direction (5) than another centering element (49) of the first bearing housing centering interface (39).

9. The toothed belt shaft according to any one of claims 1 to 8, characterized in that The second bearing housing (11) is fixed to a second axial end face (12) of the profile body (2) opposite to the first axial end face (9) by at least one fixing device (10), the deflection roller being rotatably supported in the second bearing housing, wherein the slider (3) has a second slider centering interface (50) separated from the first slider centering interface (38) along the movement axis (5), and the second bearing housing (11) has a second bearing housing centering interface (51) opposite to the second slider centering interface (50) along the movement axis (5), in particular constructed in the same manner as the first bearing housing centering interface (39), the second bearing housing centering interface being constructed for translating the second bearing housing (11) relative to the slider (3) along a first spatial direction transverse to the movement axis (5) and for rotatably orienting the second bearing housing (11) relative to the slider (3) around the movement axis (5).

10. A method for centering a first bearing housing (8) of a toothed belt shaft (1), comprising the following steps: - moving the slide (3) supported on the profile body (2) extending along the movement direction (5) into a first installation position along the movement direction (5), - positioning a first bearing shell (8) which can be fixed to a first axial end face (9) of the profile body (2) by means of at least one fixing element (10) in a fixing position, - Connecting a first slider centering interface (38) of the slider (3) with a first bearing housing centering interface (39) of the first bearing housing (8) so that the first bearing housing (8) is oriented translationally relative to the slider (3) along a first spatial direction transverse to the movement axis (5), and so that the first bearing housing (8) is oriented rotationally relative to the slider (3) around the movement axis (5), wherein a center axis (42) of a first centering element (40) of the first slider centering interface (38) and a center axis (43) of a second centering element (41) of the first bearing housing centering interface (39) are oriented parallel to the movement axis (5), in particular parallel to the movement axis (5) and coaxially with each other.

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