Base frame for a belt drive with form-locking connections for flexible conversion and method for producing such a

Abstract

The present application relates to a base frame (1) for a belt drive, comprising an elongated profile body (2) and at least one functional element (3, 4, 5), wherein the profile body (2) is tubular or groove-shaped, wherein the functional element (3, 4, 5) is provided and configured to provide a function for the belt drive. In order to provide a base frame for a belt drive and a belt drive which can be used more flexibly than the prior art, it is proposed to provide at least one recess (8, 9, 10) in at least one profile wall (7) of the profile body (2) extending along a longitudinal axis (6) of the profile body (2), wherein the at least one recess (8, 9, 10) extends along a part of a length of the profile body (2) measured parallel to the longitudinal axis (6), wherein the at least one functional element (3, 4, 5) has a functional section (11) for providing the function for the belt drive and an insertion section (12), wherein the insertion section (12) is inserted into the at least one recess (8, 9, 10), wherein the at least one recess (8, 9, 10) and the at least one functional element (3, 4, 5) are designed to be coordinated with one another in such a way that the insertion section (12) of the functional element (3, 4,5) at least substantially fills the recess (8, 9, 10) and thereby completes the profile wall (7) in the region of the recess (8, 9, 10).

Description

[0001] The present application relates to a base frame for a belt drive according to claim 1. Furthermore, the present application relates to a method for producing such a base frame according to claim 22. Finally, the present application relates to a belt drive according to the preamble of claim 25.

[0002] The belt drive can, for example, be formed by a toothed belt drive or a V-belt drive. State of the art

[0003] In the prior art, it is known to construct a base frame for a belt drive with a profile body formed from a hollow profile. Such a profile body can be made of steel, for example. In order to construct the belt drive using the base frame, it is necessary to equip the base frame with at least one functional element. For example, it is necessary to arrange at least one drive roller on the base frame, which can be driven in rotation. This can be done, for example, by means of an electric drive. For mounting the drive roller on the base frame, at least one functional element is provided, which is formed by a drive roller holder. This is intended and configured to rotatably mount the drive roller, wherein the drive roller can be driven in rotation about a drive axis.In the same way, the base frame can be equipped with additional functional elements, for example, at least one idler pulley holder for rotatably supporting a idler pulley, through which a toothed belt of the belt drive is guided. Further functional elements are conceivable.

[0004] For the arrangement of the functional elements on the profile body, it is known to weld the respective functional elements to the profile body. Particularly in a design in which the base frame is formed from a square tube, the functional elements are attached to the lateral profile walls of the profile body and welded there. This has the disadvantage that the base frame grows in width compared to the width of the profile body, since the functional elements are placed laterally on the profile walls of the profile body. Furthermore, the functional elements - once welded to the profile body - are permanently connected to the profile body. Converting the belt drive so that other functional elements are to interact with the profile body is therefore not possible.

[0005] DE 10 2007 023 540 A1 discloses a parking device for motor vehicles, with at least one parking space located on a raising and lowering platform. For this purpose, the known device has a platform arranged between two vertical columns. A so-called compensating element in the form of a flexible cable or wire runs beneath the platform. The compensating element is guided over rollers so that the platform can be raised or lowered while always remaining horizontal.

[0006] DE 2015 118 808 A1 relates to a support profile for a fiber sliver creel for spinning preparation machines. The known support profile is composed of a lower U-profile and an upper U-profile, with the legs of the U-profiles facing each other, thus creating an overall hollow profile. Within the hollow profile, a series of drive devices in the form of rotating belts are provided, by means of which rollers attached to the hollow profile are rotated. Openings for the passage of fastening devices are provided in the legs of the U-profiles.

[0007] DE 10 2018 107 257 B3 describes a frame of a device, wherein one of the profile bodies forming the frame is strip-shaped and has small notches on its opposite edges. Rollers are arranged on the strip, which are attached to the strip by means of brackets. The brackets have lugs on their underside that engage in recesses in the strip, thus ensuring a stable position on the strip.

[0008] DE 20 2021 104 125 U1 discloses a connector system for a cable tray. The known cable tray can be designed in the manner of a cable tray or cable duct, formed by one or more cable tray elements.

[0009] Finally, DE 10 2020 102 019 A1 discloses a modular belt conveyor which is intended to be used for inspection devices, such as automatic scales or the like, whereby the transport of products to be examined through an inspection area is to be enabled. Task

[0010] The present application is therefore based on the object of providing a base frame for a belt drive and a belt drive which can be used more flexibly than the prior art. Solution

[0011] The underlying object is achieved according to the invention by means of a base frame having the features of claim 1. Advantageous embodiments emerge from the associated subclaims and the description.

[0012] The base frame comprises an elongated profile body, which can be tubular or channel-shaped, for example. For example, a design in the form of a round tube, a square tube, such as a rectangular tube, or a C-profile is conceivable. The profile body can be formed, in particular, from a metal, preferably steel or aluminum. A design made of plastic is also conceivable.

[0013] For the purposes of the present application, "elongated" means that a length of the profile body along its longitudinal axis significantly exceeds both a height and a width of a profile cross-section of the profile body perpendicular to the longitudinal axis. For example, a length of the profile body measured along the longitudinal axis can be at least 10 times, preferably at least 20 times, more preferably at least 30 times the largest cross-sectional dimension (height, width, diameter) of the cross-section of the profile body.

[0014] Furthermore, the base frame comprises at least one functional element that is intended and configured to provide a function for the belt drive. As already explained above in the description of the prior art, such a functional element can, for example, be part of a deflection roller holder or a drive roller holder. Other functional elements are also conceivable. They serve to form the base frame in cooperation with the profile body, wherein the profile body is supplemented such that a belt drive can be formed. Thus, at least one functional element can, for example, be at least part of a bearing device by means of which the base frame can be attached to a higher-level component.

[0015] The profile body has at least one profile wall extending along its longitudinal axis, which has at least one recess. In the case of a profile body formed, for example, from a square tube, such a recess can therefore be formed in one of the four profile walls from which the profile body designed as a square tube is formed. The at least one recess is preferably designed such that it extends along part of a length of the profile body measured parallel to the longitudinal axis of the profile body. The recess is preferably elongated with respect to the longitudinal axis of the profile body, i.e. has a length measured parallel to the longitudinal axis of the profile body that exceeds its height measured perpendicular to the longitudinal axis. The height of the at least one recess can, for example, extend over the entire height of the respective profile wall in which the recess is formed.Preferably, the dimensions of a recess surface spanning the recess significantly exceed the thickness of the profile wall into which the recess is formed. For example, a length of the at least one recess measured parallel to the longitudinal axis of the profile body can exceed the thickness of the profile wall into which the recess is formed by at least 10 times, preferably at least 15 times, and more preferably at least 20 times.

[0016] The at least one functional element has a functional section for providing the respective function for the belt drive and an insertion section. The insertion section is intended and configured to be inserted into the at least one recess in the profile wall. Accordingly, the insertion section is inserted into the at least one recess. The recess and the functional element are designed to be coordinated with one another in such a way that the insertion section of the functional element at least substantially fills the recess and thereby completes the profile wall in the region of the recess. “Completed” here means that the insertion section is at least substantially precisely received in the recess and thus fills the latter. The profile wall can therefore act mechanically in the region of the recess in such a way as if the recess were not present.As a result, for example, the flexural rigidity and / or the torsional rigidity of the profile body are at least substantially unchanged compared to a design in which the at least one profile wall is designed without a recess.

[0017] The functional section of the at least one functional element is not inserted into the recess, but extends away from or outside the recess. This makes it particularly easy to provide a respective function for the belt drive in the functional section, for example, to provide a deflection roller bearing or a drive roller bearing.

[0018] The "insertion section" of a respective functional element is defined by the fact that the functional element is inserted into an associated recess in a profile wall of the profile body by means of the insertion section. The part of the functional element that extends outside the recess is, by definition, the "functional section." In particular, the insertion section and the functional section of a functional element can form different regions or sections of the functional element that merge seamlessly into one another. Preferably, the functional section extends at least partially, preferably completely, in a recess plane of the recess into which the associated insertion section is inserted. This is particularly the case when the functional element is planar, i.e., plate-shaped. Such a functional element can, for example, be machined from a flat sheet of metal.

[0019] The at least one functional element can, for example, be formed in one piece. Particularly preferably, the at least one functional element is plate-shaped, with the functional element being machined from a flat sheet of metal. This can be done, for example, by laser cutting. In this embodiment, the functional element is thus inherently flat and formed in one piece. The insertion section and the functional section therefore extend together in one plane.

[0020] Using the example of a deflection pulley holder, it is conceivable that the functional element is formed by a one-piece, internally flat workpiece that was machined from a sheet metal. The functional element comprises an insertion section and a functional section that merge seamlessly into one another. In the case of a functional element designed as a deflection pulley holder, the latter is preferably designed such that it provides a deflection pulley bearing that is intended and configured to receive an axis of a deflection pulley so that the latter is rotatably mounted about a deflection axis. Thus, for example, the functional element formed by the deflection pulley holder can protrude beyond the end of the profile body at one end of the profile body with the functional section, so that the deflection pulley holder forms one end of the base frame.At this end of the base frame, a deflection pulley is mounted on the finished belt drive by means of the deflection pulley holder, on which a belt of the belt drive can be guided and thus deflected.

[0021] Because the at least one functional element, with its insertion section, at least substantially completes the at least one recess in the at least one profile wall of the profile body, the profile body is effectively not mechanically weakened despite the recess, since the loss of material in the region of the recess is compensated for by the insertion section of the functional element. In this way, the profile body can be provided with a plurality of recesses in one or more profile walls of the profile body, wherein preferably all recesses of functional elements or their insertion sections are filled and thus completed. There is no loss in the mechanical usability of the profile body.In this case, all functional elements are preferably designed to match the associated recesses in such a way that the insertion sections of the functional elements at least substantially fill the recesses and thereby complete the respective profile wall in the region of the recess.

[0022] The at least one recess of the at least one profile wall is designed in the manner of a flat, window-shaped cutout, wherein the at least one functional element is formed by a one-piece, planar plate.

[0023] The base frame according to the invention has many advantages. In particular, it enables the equipping of a respective profile body with one or more functional elements without the need to apply additional material to the sides of the profile body or its profile walls. According to the above explanation, the latter is common practice in the prior art, since the functional elements are placed on the profile walls of the profile body and welded in place. The savings in the dimensions of the base frame can be particularly advantageous, especially in applications where a belt drive is to be installed in a tight installation space.

[0024] A further advantage can be that the base frame according to the invention can be converted particularly easily by dismantling at least one functional element from the profile body and replacing it with another functional element. This advantage is particularly easy to achieve if the base frame has at least two mutually associated functional elements which together form a pair of functional elements and are accordingly arranged in pairs on the profile body. As explained separately below, such functional elements can be clamped either against one another or against the profile body by means of at least one connecting means, so that they are mounted on the profile body. Replacing such functional elements with other functional elements is particularly easy by loosening the connecting means and removing the functional elements. The installation of other functional elements can then be carried out without further ado.In this way, it is particularly easy to convert the belt drive, for example to a different toothed belt profile or from a toothed belt drive to a V-belt drive or the like.

[0025] The design of the at least one recess in the manner of a window-shaped cutout has the advantage that it is particularly well suited for accommodating a flat insertion section of a respective functional element. Such a functional element can therefore be formed particularly easily from a one-piece, inherently flat workpiece, which, for example, was machined from a flat sheet of metal. Accordingly, it is particularly advantageous if the functional section of the functional element extends at least partially, preferably completely, in a recess plane that spans the recess.

[0026] Preferably, the at least one functional element is machined from a sheet metal in such a way that it immediately assumes its final shape. This can be achieved particularly easily by laser cutting, whereby the respective functional element is cut out of a sheet metal using a laser. Subsequent processing, which would influence the shape of the respective functional element, is then no longer necessary.

[0027] In a particularly advantageous embodiment, the dimensions of the cutout significantly exceed the thickness of the profile wall. Preferably, the recess extends over the entire height of the respective profile wall, which is measured along the profile wall in a plane perpendicular to the longitudinal axis of the profile body.

[0028] A length of the cutout or recess measured parallel to the wall plane of the profile wall and parallel to the longitudinal axis of the profile body significantly exceeds a thickness of the profile wall into which the recess is made, preferably by at least 10 times, more preferably by at least 15 times, even more preferably by at least 20 times. Additionally or alternatively, a height of the cutout or recess measured parallel to the wall plane of the profile wall and perpendicular to the longitudinal axis of the profile body along the profile wall can also significantly exceed the thickness of the profile wall, preferably by at least 5 times, more preferably by at least 10 times.

[0029] Furthermore, a configuration of the base frame in which the profile body is formed from a square tube can be particularly advantageous. In particular, the profile body can be formed from a rectangular tube in which the first two opposing profile walls ("first profile wall pair") have a greater height than the other two opposing profile walls ("second profile wall pair"). The configuration of the profile body in the form of a square tube is particularly well suited for arranging a plurality of functional elements, preferably in pairs, symmetrically on or in the profile walls or for inserting them into correspondingly designed recesses in the profile walls.When designing the profile body in the form of a square tube, it is furthermore particularly advantageous if all recesses, into each of which an insertion section of an associated functional element is inserted, are incorporated into the profile walls of one of the profile wall pairs of the profile body, while the profile walls of the other profile wall pair are free of at least those recesses that are provided and configured to receive an insertion section of a functional element. Preferably, the profile walls of the first profile wall pair have the recesses, while the profile walls of the second profile wall pair are free of recesses.

[0030] In a particularly advantageous embodiment of the base frame, the same comprises at least one further functional element which, together with the at least one functional element, forms a functional element pair. In this embodiment, the profile body has at least one further profile wall which extends parallel to the at least one profile wall of the profile body. The further profile wall has at least one recess which is designed to correspond to the at least one recess of the at least one profile wall, so that the recesses of the two profile walls together form a recess pair. In this embodiment, an insertion section of one (first) functional element of the functional element pair is inserted into one (first) recess of the recess pair and an insertion section of the other (second) functional element of the functional element pair is inserted into the other (second) recess of the recess pair.The recesses of the recess pair and the functional elements of the functional element pair are designed to match one another in such a way that the insertion sections of the functional elements at least substantially fill the recesses and thereby complete the associated profile walls of the profile body in the region of the recesses. As already explained above, the paired arrangement of functional elements can be particularly advantageous for supplementing the profile body in such a way that the resulting base frame has the functions necessary for the operation of a belt drive. For example, two functional elements belonging to a functional element pair can jointly form a deflection pulley holder or a drive pulley holder.

[0031] Particularly preferably, the base frame can be constructed symmetrically, wherein the recesses of the pair of recesses and functional elements of the pair of functional elements are arranged symmetrically with respect to a base plane of the profile body containing the longitudinal axis of the profile body. The base plane forms the plane of symmetry of the base frame. It divides the profile body along its longitudinal axis into two mutually symmetrical halves. This is particularly easy to implement, for example, with a profile body formed from a square tube. Furthermore, it can be advantageous to design the base frame with doubly symmetrical design, namely both with respect to the aforementioned base plane and with respect to a plane perpendicular to the longitudinal axis of the profile body.

[0032] Using the example of the bearing of a deflection pulley, it can be particularly advantageous if a deflection pulley holder of the base frame is formed by a total of two functional elements of a functional element pair, wherein the first functional element of the functional element pair provides a first (left or right) deflection pulley bearing and the second functional element of the functional element pair provides a second (right or left) deflection pulley bearing. The deflection pulley bearings are jointly provided and configured to rotatably accommodate an axle of a deflection pulley of the belt drive, wherein the deflection pulley bearings each accommodate one end of the axle. In this way, the deflection pulley bearings jointly define the deflection axis about which the deflection pulley is rotatably mounted on the deflection pulley holder. Analogously, in a particularly simple manner, two functional elements of a functional element pair can form a drive pulley holder that defines a drive axis of a drive pulley.The deflection roller holder can preferably be arranged at one end of the profile body, wherein the paired recesses of the profile walls, into which the insertion sections of the functional elements of the pair of functional elements are inserted, are formed at one end of the profile walls.

[0033] In a particularly preferred manner, the base frame comprises a plurality of pairs of functional elements, wherein insertion sections of the functional elements of the functional element pairs are inserted in pairs into recesses of corresponding recess pairs. The recesses of the recess pairs are formed in pairs in profile walls of the profile body that extend parallel to one another. The recesses of a respective recess pair are designed to match the functional elements of the associated pair of functional elements in such a way that the insertion sections of the functional elements at least substantially fill the associated recesses and thereby complete the profile walls of the profile body in the region of the recesses. In a particularly preferred manner, the profile body of the base frame formed in this way is designed symmetrically, wherein more preferably the base frame as a whole is designed symmetrically.With the plurality of pairs of functional elements, the profile body can be particularly easily supplemented with a plurality of functions, so that the base frame has a plurality of functions for a belt drive.

[0034] For example, a total of two pairs of functional elements can be provided to provide a total of two deflection roller holders, wherein the deflection roller holders are preferably arranged at opposite ends of the profile body.

[0035] Furthermore, for example, at least one pair of functional elements can be provided to provide a drive roller holder, wherein the two functional elements of the pair of functional elements each provide a drive roller bearing for the rotationally drivable mounting of a drive roller for a belt of the belt drive. In particular, a drive bearing can be formed on each of the two functional elements of the pair of functional elements, which are jointly designed to support one end of an axle of a drive roller, so that the drive roller bearings together define the drive axle.

[0036] If the base frame comprises at least one (preferably two) deflection roller holders as well as a drive roller holder, it can also be particularly advantageous if the deflection roller holder and the drive roller holder are aligned accordingly. The matching alignment results from the deflection axis provided on the deflection roller holder and the drive axis provided on the drive roller holder being aligned parallel to one another. If the base frame is designed to be symmetrical overall with respect to a base plane containing the longitudinal axis of the profile body, the deflection axis and the drive axis are advantageously oriented perpendicular to the base plane. In this configuration, it is particularly advantageous if the profile body is formed from a square tube, in particular a rectangular tube.

[0037] If the base frame comprises at least one pair of functional elements, it can also be particularly advantageous if the functional elements of the functional element pair are connected to one another in a force-transmitting manner. The insertion sections of the functional elements of the functional element pair are inserted in pairs into corresponding recesses of an assigned recess pair. The functional elements and the recesses are coordinated with one another as explained above in such a way that the insertion sections at least substantially fill the corresponding recesses and thereby complete the respective profile wall in the region of the recesses. By means of the force-transmitting connection of the functional elements of the respective functional element pair, the functional elements can be locked to the profile body particularly easily.

[0038] If a force-transmitting connection of the functional elements of a functional element pair is provided, it may further be advantageous if the two functional elements of the functional element pair are directly connected to one another by means of at least one connecting means, for example by means of a threaded bolt penetrating both functional elements. Particularly preferably, the functional elements are connected to one another by means of several connecting means. Furthermore, it may be advantageous if the at least one connecting means interacts with the insertion sections of the functional elements of the respective functional element pair. Using the at least one connecting means, the functional elements can be braced against one another and / or against the profile body.This makes it particularly easy to lock the functional elements to the profile body in such a way that the insertion sections of the functional elements are firmly inserted into the corresponding recesses in the profile walls of the profile body. This is done in such a way that, when forces are applied to the functional elements, their movement relative to the profile body is prevented.

[0039] In the preferred embodiment, in which the profile body is formed from a square tube and the recesses of at least one pair of recesses are formed in opposing, parallel profile walls ("profile wall pair") of the profile body, it can also be particularly advantageous if the recesses of the pair of recesses each extend over the entire height of the respective associated profile wall. This has the effect that the insertion sections of the functional elements of the pair of functional elements assigned to the pair of recesses rest against the end faces of the profile walls of the other pair of profile walls of the profile body. This is due to the fact that when the profile body is designed in the form of a square tube, the end faces of one pair of profile walls, in which the recesses are not made, are exposed in the region of the recesses in the profile walls of the other pair of profile walls.The insertion sections of the functional elements of the functional element pair rest accordingly against these end faces, so that they abut against the end faces of the profile walls of one profile wall pair in a direction perpendicular to a recess plane of the respective recess. By means of a preferred connection of the functional elements by means of at least one connecting element, the functional elements can be clamped particularly easily against the profile body, with the functional elements pressing with their insertion sections against the end faces of the profile walls of one profile wall pair in which the recesses are not formed.

[0040] In a further advantageous embodiment of the base frame, all functional elements are formed from a one-piece, flat plate, wherein the functional elements are preferably machined from a flat sheet metal.

[0041] Further enhancing the base frame, the at least one profile wall and the insertion section of the at least one functional element, which interacts with the at least one recess of this profile wall, have complementary form-locking sections. In other words, in this embodiment, the insertion section of the functional element and the profile wall, into whose recess the insertion section is inserted, interact in a form-locking manner by means of complementary form-locking elements. These form-locking sections effect a form-locking connection between the profile body and the functional element such that movement of the functional element relative to the profile body, at least parallel to a wall plane of the profile wall, is completely blocked.

[0042] The respective insertion section and the profile wall, in whose recess the insertion section is inserted, can be designed, for example, in the manner of interlocking puzzle pieces. The form-fitting sections extend particularly advantageously parallel to the wall plane of the profile wall, in whose recess the insertion section is inserted. This is particularly advantageous when the respective functional element is in the form of a flat plate. In this design, the form-fitting sections can be designed, for example, in the form of edge-side elevations or depressions that extend in an element plane of the functional element. The form-fitting sections can, for example, be drop-shaped or omega-shaped on an edge of the functional element or, conversely, on an edge of the recess. A corresponding design can be seen in the exemplary embodiment below.

[0043] If the base frame comprises a plurality of functional elements, it is particularly advantageous if the insertion sections of at least some of the functional elements, preferably the insertion sections of all functional elements, and the respective associated profile walls of the profile body, in whose recesses the insertion sections are inserted, have complementary form-fitting sections. In this way, the functional elements can be mounted in the recesses in a particularly simple, force-transmitting manner.

[0044] In a further advantageous embodiment of the base frame, the same comprises at least one bearing device connected to the profile body, by means of which the profile body can be mounted on a higher-level component. Preferably, the bearing device comprises at least one functional element or is formed by at least one functional element. In this embodiment, an insertion section of the functional element is inserted into a corresponding recess in a profile wall of the profile body, and a functional section of the functional element is provided and configured to be connected to a higher-level component in a force-transmitting manner. In this case, the recess and the functional element are designed to match one another in such a way that the insertion section at least substantially fills the recess and thereby completes the profile wall in the region of the recess.

[0045] The bearing device preferably comprises two functional elements or is formed by two functional elements that together form a pair of functional elements. The functional elements are advantageously of identical design, with the functional sections of the functional elements preferably having an L-shaped cross-section. Thus, the functional elements each have a mounting base (lower leg of the "L"), by means of which they can be particularly well attached to a superordinate component, for example, by means of a screw connection.

[0046] Further enhancing the base frame, the profile body is symmetrical with respect to a base plane oriented parallel to the longitudinal axis of the profile body. The base plane thus forms a plane of symmetry of the profile body that includes the longitudinal axis of the profile body. Such symmetry is present, for example, in a profile body formed from a square tube and / or a round tube. Furthermore, a channel-shaped profile body can be symmetrical in the manner described, for example in a design in the form of a C-profile. The symmetrical design of the profile body has the advantage that functional elements of one or more pairs of functional elements can be inserted particularly easily into pairwise associated recesses of one or more pairs of recesses.The recesses of the respective pair of recesses are formed in opposite profile walls of the profile body on both sides of the base plane.

[0047] If the profile body is symmetrically formed, it may further be advantageous if a cutout surface of the at least one recess, preferably the cutout surfaces of all recesses, is / are oriented parallel to the base plane. If the functional elements are plate-shaped in the manner described above, the element planes of the functional elements, whose insertion sections are inserted into the recesses, also extend parallel to the base plane.

[0048] Preferably, the base frame is designed symmetrically with respect to the base plane of the profile body.

[0049] In a further advantageous embodiment of the base frame, the dimensions of the insertion section of the at least one functional element can be matched to the associated recess such that the insertion section is flush with the respective profile wall of the profile body in which the recess is formed, at least on one side, preferably on both sides. In this way, the functional element can complete the recess in the profile wall with its insertion section without any protruding edges forming on a surface of the profile wall that project inwards or outwards beyond the profile wall perpendicular to the wall plane of the respective profile wall. Preferably, the insertion sections of all functional elements of the base frame are inserted flush into the associated recesses in the profile walls or are designed such that they are flush with the profile walls.

[0050] Finally, a design of the base frame can be particularly advantageous in which all recesses designed to accommodate insert sections of functional elements interact with functional elements, so that all recesses of insert sections of the associated functional elements are completed. With this design, the profile body is effectively completely present again despite the recesses formed in its profile walls, since the recesses are filled by the insert sections and the profile body is thus completed again. The suitability of the profile body for mechanically dissipating operating forces that arise during operation of the belt drive is therefore not limited by the introduction of the recesses into the profile walls of the profile body.

[0051] From a procedural point of view, the underlying problem is solved by means of a method having the features of claim 22. Advantageous embodiments emerge from the associated subclaims and the description.

[0052] The method comprises the steps of forming at least one recess in the form of a flat, window-shaped cutout into a profile wall of an elongated profile body. An insertion section of at least one functional element, formed by a one-piece, internally flat plate, is then inserted into the at least one recess. The recess and the functional element are coordinated with one another in such a way that the insertion section of the functional element at least substantially fills the recess and thereby completes the profile wall in the region of the recess.

[0053] The base frame according to the invention is particularly easy to manufacture using the method according to the invention. The advantages resulting therefrom have already been explained above. In particular, the base frame can be made slimmer than in the prior art because the at least one functional element is not applied laterally to a respective profile wall of the profile body and welded there to the profile wall, but is inserted into the profile wall. For this purpose, the recess into which the insertion section of the functional element is inserted is made in the latter. The functional element is preferably designed to match the recess such that the insertion section is received in the recess flush with the profile wall. The at least one recess can particularly preferably be made in the profile wall of the profile body by means of laser cutting.This is particularly advantageous with a metallic profile body.

[0054] In a preferred embodiment, the profile body and the at least one functional element are formed with at least one form-fitting section, so that the functional element and the profile body are positively connected to one another as a result of the insertion section of the functional element into the recess of the profile wall of the profile body in such a way that movement of the functional element relative to the profile body, at least parallel to the wall plane of the profile wall, is completely prevented. For this purpose, it is particularly advantageous if the form-fitting section is drop-shaped or omega-shaped.

[0055] Furthermore, such a method is advantageous in which at least two recesses are made in pairs opposite one another in mutually assigned, parallel profile walls, and insertion sections of two functional elements of a pair of functional elements are inserted in pairs into these recesses. In this embodiment, the two recesses form a pair of recesses. The functional elements are designed to match the recesses in such a way that the insertion sections at least substantially fill the recesses and thereby complete the profile walls in the region of the recesses. Preferably, the two functional elements of the pair of functional elements are connected to one another by means of at least one connecting means and are thereby locked in the recesses. Advantageously, the functional elements are clamped against the profile body as a result of the connection by means of the at least one connecting means.This preferably prevents movement of the functional elements in a direction perpendicular to the wall plane of the respective associated profile wall. In combination with the form-fitting sections described above, it is therefore particularly easy to fix the functional elements to the profile body, locking the functional elements both in the direction of the associated wall plane and in the direction perpendicular to the associated wall plane.

[0056] Finally, the underlying problem is solved by means of a belt drive with the features of claim 25.

[0057] The belt drive comprises a base frame, at least one belt, for example a toothed belt or a V-belt, at least one deflection pulley, preferably two deflection pulleys, and a drive pulley. The belt is designed as a self-contained endless belt, with the belt being tensioned between the drive pulley and the at least one deflection pulley, so that the belt can be driven in rotation by means of the rotary drive of the drive pulley. An electric motor, for example, can be provided to drive the drive pulley.

[0058] According to the invention, the base frame of the belt drive is designed according to one of claims 1 to 21. In other words, the belt drive according to the invention is characterized in that the base frame is designed according to the present invention. The resulting advantages have already been explained above. Examples of implementation

[0059] The invention is explained in more detail below using an exemplary embodiment illustrated in the figures. It shows: Fig. 1: An isometric view of a belt drive according to the invention with a base frame according to the invention, Fig. 2: A side view of the belt drive according to Fig. 1, Fig. 3: An isometric view of a profile body of the base frame according to Fig. 1, Fig. 4: A view of a functional element of the base frame according to Fig. 1, wherein the functional element is part of a pulley holder, Fig. 5: A view of a functional element of the base frame according to Fig. 1, wherein the functional element is part of a drive roller holder, Fig. 6: A view of a functional element of the base frame according to Fig. 1, wherein the functional element is part of a storage facility, Fig. 7: A cross-section through the base frame perpendicular to a longitudinal axis of the profile body according to Fig. 1.

[0060] An example of implementation that is shown in the Fig. 1 to 7, comprises a belt drive according to the invention, which in the example shown is designed in the form of a toothed belt drive. Accordingly, the belt drive comprises a toothed belt 24 which is designed to be closed in itself. The toothed belt 24 is mounted on a base frame 1 according to the invention in a guide rail 28, wherein the base frame 1 in the example shown is equipped with a total of two deflection pulleys and a drive pulley. The latter is intended and configured to interact with a drive (not shown in the figures), which can be formed, for example, by an electric motor. In this way, the drive pulley is designed to be rotatably driven about a drive axis 14, wherein a toothing of the toothed belt 24 meshes with a complementary toothing of the drive pulley, such that a torque can be transmitted from the drive pulley to the toothed belt 24.The deflection pulleys are arranged opposite each other at the ends of the base frame 1, with the toothed belt 24 being deflected by 180° by means of the deflection pulleys. The deflection pulleys are each rotatably mounted about a deflection axis 13. The drive axis 14 and the deflection axes 13 are oriented parallel to each other in the example shown.

[0061] The base frame 1 comprises, in the example shown, an elongated profile body 2 which extends along a longitudinal axis 6. The profile body 2 is formed here from a rectangular tube made of steel, which has a total of four profile walls 7, 7'. Two of the profile walls 7, 7' are arranged opposite one another in pairs, so that the profile body 2 has a total of two profile wall pairs. A first profile wall pair comprises the two (first) profile walls 7, whose height 16, measured in a plane oriented perpendicular to the longitudinal axis 6 along the respective profile wall 7, is greater than the height 16' of the two (second) profile walls 7' of the second profile wall pair, also measured in a plane oriented perpendicular to the longitudinal axis 6 along the respective profile wall 7'. With regard to the side view in Fig. 2, one of the profile walls 7 of the first pair of profile walls is therefore visible there. When the base frame 1 is in its intended orientation, the two profile walls 7 of the first pair of profile walls extend vertically in a cross-section of the profile body 2 perpendicular to the longitudinal axis 6, and the two other profile walls 7' of the second pair of profile walls extend horizontally.

[0062] In the example shown, both the profile body 2 as such and the base frame 1 are symmetrical with respect to a base plane 23, which includes the longitudinal axis 6 of the profile body 2. The base plane 23 is in Fig. 2 is oriented vertically, i.e., parallel to a plane of the drawing sheet. The deflection axis 13 and the drive axis 14 are oriented perpendicular to the base plane 23.

[0063] In the example shown, the base frame 1 has a plurality of functional elements 3, 4, 5, each of which is part of a respective pair of functional elements, wherein each pair of functional elements comprises two mutually associated functional elements 3, 4, 5. As such, the functional elements 3, 4, 5 are intended and configured to supplement the profile body 2 in such a way that functions for the belt drive are provided. In this way, the profile body 2 is supplemented to form the base frame 1 by means of the functional elements 3, 4, 5. The functional elements 3, 4, 5 cooperate with corresponding recesses 8, 9, 10 in the profile walls 7 of the profile body 2 as insertion sections 12 of the functional elements 3, 4, 5 are inserted into the recesses 8, 9, 10 and are consequently received therein.In the example shown, only the profile walls 7 of the first profile pair are provided with recesses 8, 9, 10, while the profile walls 7' of the second profile wall pair are free of recesses.

[0064] The functional elements 3, 4, 5, regardless of their specific configuration, are designed in a consistent manner in that they each comprise an insertion section 12 and a functional section 11. In this case, the functional elements 3, 4, 5 are designed such that the respective insertion section 12 merges seamlessly into the respective functional section 11. At least the functional elements 3, 4 shown here are designed in the form of inherently flat, plate-shaped workpieces, which can in particular be machined from a flat sheet metal.

[0065] The functional elements 3, 4, 5 are designed to match the associated recesses 8, 9, 10 in such a way that the insertion sections 12 of the functional elements 3, 4, 5 at least substantially fill the respective associated recesses 8, 9, 10 and thereby complete the profile walls 7 in the region of the recesses 8, 9, 10. In other words, the insertion sections 12 of the functional elements 3, 4, 5 are designed to fit precisely with the recesses 8, 9, 10. This ensures that the profile body 2 is not effectively mechanically weakened despite the recesses 8, 9, 10, since the weakening caused by the recesses 8, 9, 10 is compensated by the insertion sections 12 of the functional elements 3, 4, 5. The profile body 2 can thereby act on the base frame 1 in an effectively mechanically similar manner to a profile body 2 which is designed free of recesses 8, 9, 10.

[0066] Since the profile body 2 is symmetrical with respect to the base plane 23, the recesses 8, 9, 10 are formed in pairs in the opposing profile walls 7 of the first profile wall pair. This is particularly evident from Fig. 3. In addition to its symmetry with respect to the base plane 23, the profile body 2 is also symmetrical with respect to a center plane 18 which is oriented perpendicular to the longitudinal axis 6 and divides the profile body 2 into two halves of equal length.

[0067] In the example shown, the recesses 8, 9, 10 are each designed as a window-shaped cutout in the corresponding profile wall. This is particularly evident from Fig. 3. The recesses 8, 9, 10 are thus designed such that their dimensions, or the dimensions of the window-shaped cutout, significantly exceed the thickness of the profile wall 7 into which the respective recess 8, 9, 10 is inserted. In the example shown, this applies to both the length and the height of each recess 8, 9, 10.

[0068] The functional elements 3, 4, 5 are designed to perform different functions for the belt drive. Two pairs of functional elements 3, which together form a functional element pair, together form a deflection pulley holder. One of the functional elements 3, which form the deflection pulley holder, is shown as an example in Fig. 4 in a view. The functional element 3 is planar and thus plate-shaped, wherein the functional element 3 was machined from a sheet metal by laser cutting. The functional element 3 comprises an insertion section 12 and a functional section 11 seamlessly connected to it. The insertion section 12 and the functional section 11 are - as with all functional elements 3, 4, 5 - logically separated from one another in that the insertion section 12 is inserted into an associated recess 8 of a profile wall 7 of the profile body 2, while the functional section 11 extends away from the profile body 2 or outside the recess 8. The functional section 11 extends within a recess plane 27 of the recess 8, into which the insertion section 12 is inserted.

[0069] In the example shown, the functional section 11 of the functional element 3 protrudes beyond one end of the profile body 2. This is particularly evident from Fig. 2. A deflection roller bearing is formed on the functional element 3, which here is designed in the form of a central recess in the functional section 11. This makes the functional element 3 suitable for receiving the axle of a deflection roller, with the recess defining the deflection axis of the deflection roller. The other, opposite functional element 3 of the functional element pair is constructed in a matching manner, so that the two functional elements 3 of the functional element pair together form the deflection roller holder.

[0070] In the example shown, a total of four recesses 25 are provided in the insertion section 12 of the functional element 3. These are intended and configured to each interact with a connecting means 15. In the example shown, the connecting means are formed by screw bolts. These can be guided through the recesses 25 of both functional elements 3 of the functional element pair and thereby directly connect the functional elements 3 in the region of their insertion sections 12. The associated recesses 8 in the profile walls 7 of the profile body 2 are designed such that they each extend over an entire height 16 of the respective profile wall 7. This is particularly evident from Fig. 3. This "exposes" the end faces 17 of the profile walls 7' of the second pair of profile walls, so that the insertion sections 12 of the functional elements 3 abut or rest against the end faces 17 of the profile walls 7'. By connecting the functional elements 3 by means of the connecting means 15, the functional elements 3 are clamped against the profile body 2, namely against the aforementioned end faces 17 of the profile walls 7', and are thereby locked to the profile body 2. This applies at least to a movement of the functional elements 3 in a direction perpendicular to the wall planes 21 of the profile walls 7 of the first pair of profile walls.

[0071] In order to additionally block a movement parallel to the respective wall plane 21, the functional element 3 in the example shown has a total of two form-fitting sections 19, which are formed on the edge side as part of the insertion section 12 of the respective functional element 3. This is particularly evident from Fig. 4. The form-locking sections 19 are omega-shaped in the example shown. Accordingly, the profile wall 7, in the region of the recess 8 into which the insertion section 12 is inserted, has correspondingly shaped form-locking sections 20, which are omega-shaped and complementary to the form-locking sections 19. The form-locking sections 19, 20 together ensure that the functional element 3 cannot move relative to the profile wall 7 either in a direction parallel to the longitudinal axis 6 of the profile body 2 or in a direction parallel to the base plane 23 of the profile body 2. In other words, movement of the functional element 3 parallel to the wall plane 21 of the profile wall 7 is completely prevented.

[0072] In the example shown, the base frame 1 comprises a total of two deflection roller holders, which are connected to opposite ends of the profile body 2. The deflection roller holders each comprise two functional elements 3 according to Fig. 4, which are inserted in pairs in associated recesses 8 of corresponding recess pairs.

[0073] Furthermore, the base frame 1 has a drive roller holder, which is formed by two functional elements 4 of a functional element pair. One of the functional elements 4 is shown as an example in Fig. 5. The functional element 4 also comprises an insertion section 12 and a functional section 11. Since the functional element 4 is planar in itself, the functional section 11 also extends in a recess plane 27 of the recess 9, into which the insertion section 12 of the functional element 4 is inserted. The functional section 11 extends away from the profile body 2 and provides a central recess which is intended and configured to receive an axle of the drive roller. In this way, the recess defines the drive axle 14, about which the axle of the drive roller is mounted so as to be rotatably drivable. The two functional elements 4 of the functional element pair are therefore jointly suitable for receiving opposite ends of the axles of the drive roller and thereby supporting the latter.

[0074] The insertion section 12 of the functional element 4, comparable to the functional element 3, has a plurality of recesses 25, which are provided and configured to cooperate with connecting means 15. This is done in such a way that the functional elements 4 are clamped against the profile body 2 by means of the connecting means 15, wherein, in accordance with the above explanation, the functional elements 4 abut against end faces 17 of the profile walls 7' of the second profile wall pair.

[0075] Furthermore, the insertion section 12 of the functional element 4 is formed with form-fitting sections 20, which here are introduced into the insertion section 12 in the form of recesses. Conversely, the profile body 2 has complementary form-fitting sections 19 on the profile wall 7, which are designed to interact with the form-fitting sections 20 of the functional element 4. The form-fitting sections 19 of the profile body 2 protrude at the edge into the recess 9, into which the insertion section 12 of the functional element 4 is or is inserted. The form-fitting sections 19, 20 are also designed in a corresponding omega-shaped manner here.By means of the bracing of the functional elements 4 of the functional element pair using the connecting means 15 and the respective positive connection of the functional elements 4 with the respective profile wall 7 using the positive locking sections 19, 20, the functional elements 4 are effectively locked in the associated recesses 9 of the associated recess pair, so that a movement of the functional elements 4 both perpendicular to the respective wall plane 21 of the associated profile wall 7 and parallel to the respective wall plane 21 is completely prevented.

[0076] Finally, the base frame 1 has a total of two bearing devices 22, each formed by two functional elements 5. The functional elements 5 of a respective bearing device 22 are arranged in pairs and thus together form a functional element pair. One of these functional elements 5 is shown as an example in Fig. 6. In accordance with the functional elements 3, 4 already described, the insertion section 12 of the functional element 5 also has a plurality of recesses 25 for interaction with connecting means 15 as well as form-fitting sections 19 for a form-fitting connection with the profile wall 7. In contrast to the functional elements 3, 4, the functional section 11 is not planar in itself, but rather L-shaped. Accordingly, the functional element 5 has a lower mounting section 26 in the functional section 11, which is formed by the lower leg of the "L" and which, in the example shown, also has a recess 25 for the passage of a fastening means. Consequently, in this functional element 5, only a part of the functional section 11 extends within a recess plane 27 of the recess 10, into which the insertion section 12 of the functional element 5 is inserted.The mounting section 26 extends perpendicular to the recess plane 27. This is particularly evident from . Fig. 7, in which the base frame 1 is cut perpendicular to the longitudinal axis 6 of the profile body 2 in the region of a bearing device 22. By means of the bearing devices 22, the base frame 1 can be particularly easily attached to a higher-level component, wherein a screw connection using the mounting sections 26 is particularly conceivable.

[0077] In the example shown, the functional elements 3, 4, 5 are all designed and matched to the associated recesses 8, 9, 10 in such a way that, on the one hand, the insertion sections 12 of the functional elements 3, 4, 5 at least substantially fill the recesses 8, 9, 10 and thereby complete the respective profile wall 7 in the region of the recesses 8, 9, 10, and on the other hand, the insertion sections 12 are received flush on both sides in the profile walls 7. Consequently, at the transitions from the profile wall 7 to the insertion section 12 of a respective functional element 3, 4, 5, there are no edges protruding perpendicular to the respective wall plane 21. Furthermore, in the example shown, the functional elements 3, 4, 5 are designed in a consistent manner in that the functional elements 3, 4, 5 are designed as such in one piece, wherein the respective insertion sections 12 merge seamlessly into the respective functional sections 11. List of reference symbols 1 base frame 2 profile bodies 3 Functional element 4 Functional element 5 Functional element 6 Longitudinal axis 7, 7' profile wall 8 Recess 9 Recess 10 Recess 11 Functional section 12 Insertion section 13 Deflection axis 14 Drive axle 15 connecting devices 16 height 17 Front side 18 Middle level 19 Form-fitting section 20 Form-fitting section 21 wall level 22 Storage facility 23 Ground level 24 timing belts 25 recess 26 Assembly section 27 Recess level 28 Guide rail

Claims

[1] Base frame (1) for a belt drive, comprising - an elongated profile body (2), - at least one functional element (3, 4, 5), wherein the profile body (2) is tubular or groove-shaped, wherein the functional element (3, 4, 5) is provided and arranged to provide a function for the belt drive, wherein at least one profile wall (7) of the profile body (2) extending along a longitudinal axis (6) of the profile body (2) has at least one recess (8, 9, 10), wherein the at least one recess (8, 9, 10) extends along a part of a length of the profile body (2) measured parallel to the longitudinal axis (6), wherein the at least one functional element (3, 4, 5) has a functional section (11) for providing the function for the belt drive and an insertion section (12), wherein the insertion section (12) is inserted into the at least one recess (8, 9, 10), characterized by , that the at least one recess (8, 9, 10) is designed in the manner of a window-shaped cutout made flat in the at least one profile wall (7), wherein the at least one functional element (3, 4, 5) is formed by a one-piece, planar plate, wherein the at least one recess (8, 9, 10) and the at least one functional element (3, 4, 5) are designed to be coordinated with one another in such a way that the insertion section (12) of the functional element (3, 4, 5) at least substantially fills the recess (8, 9, 10) and thereby completes the profile wall (7) in the region of the recess (8, 9, 10). [2] Base frame (1) according to claim 1, characterized by that the dimensions of the cutout significantly exceed the thickness of the profile wall (7). [3] Base frame (1) according to one of the preceding claims, characterized by that the functional section (11) of the at least one functional element (3, 4, 5) extends at least partially within a recess plane (27) spanned by the at least one recess (8, 9, 10), into which the insertion section (12) of the functional element (3, 4, 5) is inserted. [4] Base frame (1) according to one of the preceding claims, characterized by that the profile body (2) is formed by a square tube. [5] Base frame (1) according to one of the preceding claims, characterized byat least one second functional element (3, 4, 5) which, together with the at least one functional element (3, 4, 5), forms a functional element pair, wherein the profile body (2) has at least one second profile wall (7) which extends parallel to the at least one profile wall (7) of the profile body (2), wherein the second profile wall (7) has at least one further recess (8, 9, 10) which is designed to correspond to the at least one recess (8, 9, 10) of the first profile wall (7), so that the recesses (8, 9, 10) together form a recess pair, wherein the insertion section (12) of the first functional element (3, 4, 5) of the functional element pair is inserted into a first recess (8, 9, 10) of the recess pair and an insertion section (12) of the second functional element (3, 4, 5) of the functional element pair is inserted into the second recess (8, 9, 10) of the pair of recesses, wherein the recesses (8, 9,10) of the pair of recesses and the functional elements (3, 4, 5) of the pair of functional elements are designed to be coordinated with one another in such a way that the insertion sections (12) of the functional elements (3, 4, 5) at least substantially fill the recesses (8, 9, 10) and thereby complete the two profile walls (7) of the profile body (2) in the region of the two recesses (8, 9, 10). [6] Base frame (1) according to one of the preceding claims, characterized bya plurality of functional element pairs, wherein insertion sections (12) of the functional elements (3, 4, 5) of the functional element pairs are inserted in pairs into recesses (8, 9, 10) of corresponding recess pairs, wherein the recess pairs are formed in pairs in profile walls (7) of the profile body (2) that extend parallel to one another, wherein the recesses (8, 9, 10) of a respective recess pair and the functional elements (3, 4, 5) of the respectively associated functional element pair are designed to be coordinated with one another in such a way that insertion sections (12) of the functional elements (3, 4, 5) at least substantially fill the associated recesses (8, 9, 10) and thereby complete the profile walls (7) of the profile body (2) in the region of the recesses (8, 9, 10). [7] Base frame (1) according to one of the preceding claims, characterized bythat at least one of the functional elements (3), preferably two functional elements (3) of a pair of functional elements, is or are formed by a deflection pulley holder which is provided and designed to at least partially support a deflection pulley of the belt drive, wherein the deflection pulley holder preferably has a deflection pulley bearing for the rotatable support of a deflection axis (13) of a deflection pulley. [8] Base frame (1) according to one of the preceding claims, characterized by that at least one of the functional elements (4), preferably two functional elements (4) of a functional element pair, is or are formed by a drive roller holder which is provided and designed to at least partially support a drive roller of the belt drive, wherein the drive roller holder preferably has a drive roller bearing for the rotationally drivable support of a drive axle (14) of a drive roller. [9] Base frame (1) according to claims 7 and 8, characterized by that the at least one deflection roller holder and the at least one drive roller holder are aligned in such a way that the deflection axis (13) and the drive axis (14) are aligned parallel to one another. [10] Base frame (1) according to one of claims 5 to 9, characterized by that the functional elements (3, 4, 5) of a respective pair of functional elements, the insertion sections (12) of which are inserted in pairs into the recesses (8, 9, 10) of an associated pair of recesses, are connected to one another in a force-transmitting manner. [11] Base frame (1) according to claim 10, characterized bythat the two functional elements (3, 4, 5) of the pair of functional elements are directly connected to one another by means of at least one connecting means (15) which interacts with both functional elements (3, 4, 5), wherein the functional elements (3, 4, 5) are preferably braced against the profile body (2) by means of the at least one connecting means. [12] Base frame (1) according to claim 10 or 11, characterized byin that the profile body (2) is formed from a square tube, wherein the recesses (8, 9, 10) of at least one pair of recesses are formed in mutually opposite, parallel-oriented profile walls (7) of the profile body (2), wherein the recesses (8, 9, 10) preferably extend over an entire height (16) of the associated profile walls (7), so that insertion sections (12) of the functional elements (3, 4, 5) of the pair of functional elements assigned to the pair of recesses, inserted into the recesses (8, 9, 10) of the pair of recesses, bear against end faces (17) of the other two profile walls (7') of the profile body (2). [13] Base frame (1) according to one of the preceding claims, characterized by that all functional elements (3, 4, 5) are formed from a one-piece, flat plate, wherein preferably the functional element (3, 4, 5) is machined from a flat sheet metal. [14] Base frame (1) according to one of the preceding claims, characterized by in that the at least one profile wall (7) and the insertion section (12) of the at least one functional element (3, 4, 5) cooperating with the at least one recess (8, 9, 10) of this profile wall (7) have complementary form-fitting sections (19, 20) which bring about a form-fitting connection between the profile body (2) and the functional element (3, 4, 5), so that a movement of the functional element (3, 4, 5) relative to the profile body (2) parallel to a wall plane (21) of the profile wall (7) is completely blocked. [15] Base frame according to claim 14, characterized bya plurality of functional elements (3, 4, 5), wherein the insertion sections (12) of at least some of the functional elements (3, 4, 5), preferably the insertion sections (12) of all functional elements (3, 4, 5), and the respectively associated profile walls (7) of the profile body (2), in whose recesses (8, 9, 10) the insertion sections (12) of the functional elements (3, 4, 5) are inserted, have complementary form-fitting sections (19, 20). [16] Base frame (1) according to one of the preceding claims, characterized by at least one bearing device (22) connected to the profile body (2), by means of which the profile body (2) can be mounted on a higher-level component. [17] Base frame according to claim 16, characterized byin that the bearing device (22) comprises at least one of the functional elements (5), wherein an insertion section (12) of the functional element (5) is inserted into a corresponding recess (10) and a functional section (11) of the functional element (5) is provided and designed to be connected to a higher-level component in a force-transmitting manner, wherein the recess (10) and the functional element (5) are designed to be coordinated with one another in such a way that the insertion section (12) of the functional element (5) at least substantially fills the recess (10) and thereby completes the profile wall (7) in the region of the recess (10). [18] Base frame (1) according to claim 17, characterized by that the bearing device (22) is formed by two functional elements (5) of a pair of functional elements. [19] Base frame (1) according to one of the preceding claims, characterized bythat the profile body (2) is symmetrical with respect to a base plane (23) oriented parallel to the longitudinal axis (6) of the profile body (2), wherein the base plane (23) includes the longitudinal axis (6). [20] Base frame (1) according to one of the preceding claims, characterized by that the dimensions of the insertion section (12) of the at least one functional element (3, 4, 5) are adapted to the associated recess (8, 9, 10) in such a way that the insertion section (12) ends flush with the respective profile wall (7) of the profile body (2) in which the recess (8, 9, 10) is formed, at least on one side, preferably on both sides. [21] Base frame (1) according to one of the preceding claims, characterized bythat all recesses (8, 9, 10) designed to receive insertion sections (12) of functional elements (3, 4, 5) interact with functional elements (3, 4, 5) so that all recesses (8, 9, 10) are completed. [22] Method for producing a base frame (1) according to one of claims 1 to 21, comprising the following method steps: - introducing at least one recess (8, 9, 10) in the manner of a flat, window-shaped cutout into a profile wall (7) of an elongated profile body (2); - Inserting an insertion section (12) of at least one functional element (3, 4, 5), which is formed by a one-piece, planar plate, into the at least one recess (8, 9, 10), wherein the recess (8, 9, 10) and the functional element (3, 4, 5) are matched to one another in such a way that the insertion section (12) of the functional element (3, 4, 5) at least substantially fills the recess (8, 9, 10) and thereby completes the profile wall (7) in the region of the recess (8, 9, 10). [23] Method according to claim 22, characterized bythat the profile body (2) is formed with at least one form-fitting section (19, 20) when the at least one recess (8, 9, 10) is made in the at least one profile wall (7) and the at least one functional element (3, 4, 5), the insertion section (12) of which is to be inserted into this recess (8, 9, 10), so that the functional element (3, 4, 5) and the profile body (2) are connected to one another in a form-fitting manner as a result of the insertion section (12) of the functional element (3, 4, 5) being inserted into the recess (8, 9, 10) in such a way that a movement of the functional element (3, 4, 5) relative to the profile body (2) is prevented at least in a direction parallel to a wall plane (21) of the profile wall (7). [24] Method according to one of claims 22 or 23, characterized bythat at least two recesses (8, 9, 10) are made in pairs opposite one another in profile walls (7) which are assigned to one another and extend parallel to one another, and insertion sections (12) of two functional elements (3, 4, 5) of a pair of functional plates are inserted in pairs into these recesses (8, 9, 10), wherein preferably the two functional elements (3, 4, 5) are connected to one another by means of at least one connecting means (15) and are thereby clamped against the profile body (2). [25] Belt drive, comprising - a base frame (1), - at least one toothed belt (24), - at least one pulley, - a drive roller, wherein the toothed belt (24) is designed as a self-contained endless belt, wherein the toothed belt (24) is tensioned on the drive roller and the at least one deflection roller, so that the toothed belt (24) can be driven in rotation by means of a rotary drive of the drive roller, characterized by , that the base frame (1) is designed according to one of claims 1 to 21.

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