RU2779769C2 - Running gear lever for motor trackless vehicle - Google Patents

Abstract

FIELD: car industry.

SUBSTANCE: invention relates to a structural element for a motor trackless vehicle. Structural element (1) for a motor trackless vehicle has section (2) made of fiber-reinforced polymer in the form of a hollow profile, and load input element (3) made of metal material. Section (2) and element (3) are connected to each other into common connecting section (4) by means of permanent adhesive insert connection (5). End section (6) of element (3) and end section (7) of section (2) mutually and at least essentially with a geometrical closure enter each other. The structural element is made in the form of a running gear lever. End section (6) of element (3) has insert gear crown (8) with gears (10) extending at least essentially in longitudinal direction (9) of common connecting section (4). Section (2) has at least one cavity, which is formed in the form of a closed-loop chamber. Insert gear crown (8) has at least five gears (10), at least one of which enters at least one cavity of section (2).

EFFECT: ease of a structural element, to which relatively high loads can be transferred at the same time, is achieved.

18 cl, 14 dwg

Description

The invention relates to a structural element for a motorized trackless vehicle, having a section made in the form of a hollow profile made of a fiber-reinforced polymer and a load input element made of a metallic material, according to the restrictive part of claim 1 of the claims.

Structural elements for motorized trackless vehicles having a fiber-reinforced polymer section made in the form of a hollow profile and a load input element made of a metallic material are known from the prior art. DE 102010053843 A1 discloses a spacer-shaped structural element made of fiber-reinforced polymer, which is made in the form of a tubular hollow profile. The spacer-shaped structural element is connected by means of a permanent plug-in connection to a load input element designated as an intermediate part, which consists of a metallic material, the permanent plug-in connection being made in the form of an adhesive connection. To perform an adhesive connection, first the end of the spacer-shaped structural element is covered with a layer of adhesive. Subsequently, the end thus coated is inserted into the sleeve-shaped receiving space of the load input element, after which the adhesive layer comes into contact with the walls of the sleeve-shaped receiving space and exerts its effect. In this case, the end of the structural element made in the form of a spacer is glued along the outer perimeter with the inner wall of the receiving space made in the form of a sleeve. With this arrangement, the load input into the strut-shaped fiber-reinforced polymer structural element is carried out only along the outer perimeter of the tubular end of the hollow profile. Therefore, the load is introduced into the hollow profile unevenly, as a result of which, in the connecting region in which the two joined components are glued to each other, the regions of the end of the hollow profile close to the outer perimeter are loaded more strongly than the regions of the end of the hollow profile close to the inner perimeter. Under critical load, failure occurs here due to the fact that the outer, close to the outer perimeter layer of the end of the hollow profile is separated from the rest of the end of the hollow profile. This means in practice that the end layer of the end of the hollow profile is torn off. When a bending load occurs on the hollow profile, and in particular at the end of the hollow profile, the hollow profile is only slightly supported, so that stresses occur locally at the transition from the glued end of the hollow profile to the free area of the hollow profile.

Structural elements for motorized trackless vehicles of the type named at the beginning are known from WO 2018/197136 A1 and also from EP 2722533 A1.

The object of the invention is to provide a structural element for a motorized trackless vehicle which is in the form of a lightweight structural element at least partly composed of fiber-reinforced polymer and which at the same time can transmit relatively high loads.

According to the present invention, this problem is solved by a structural element with the features of independent claim 1 of the claims.

Preferred embodiments and improvements are the subject of the dependent claims. Other features and details of the invention follow from the description and drawings.

Accordingly, the invention provides a structural element for a motorized trackless vehicle. The structural element has a section made in the form of a hollow profile made of a fiber-reinforced polymer and a load input element made of a metallic material. The section made in the form of a hollow profile and the load input element are connected to each other in a common connecting section by means of a permanent, adhesive plug-in connection. In the plug-in connection, the end section of the load insertion element and the end section of the section made in the form of a hollow section mutually and at least essentially form-fittingly enter into each other. According to the invention, the structural element is made in the form of a running gear arm for a motorized trackless vehicle, and the end section of the load input element has a plug-in gear rim with teeth extending at least substantially in the longitudinal direction of the common connecting section, due to which the rigidity of the end section of the element input load in the longitudinal direction of the common connecting section is reduced.

The section made in the form of a hollow profile and the load input element are first of all connected into a common connecting section by means of an adhesive. If the section made in the form of a hollow section consists of a fiber-reinforced polymer and has a significantly lower rigidity due to the material than a load insertion element consisting of a metal, for example aluminum, then stresses in such an adhesive, for example under tensile load, in a common connecting section , as described earlier, is fundamentally relatively high. In the inventive plug-in toothed rim, the rigidity of the load input element in the common connecting section of the section made in the form of a hollow profile and the load input element in the longitudinal direction of the common connecting section is reduced due to geometric solutions, namely due to the plug-in toothed rim. In the area of the plug-in toothed rim, the end section of the load input element is not made solid, but is reduced by the volume of the intermediate spaces between the teeth. First of all, the rigidity of the end section of the load input element in the longitudinal direction of the common connecting section is reduced under a tensile load on the connecting section. Such a tensile load attempts to pull the end section of the section made in the form of a hollow profile out of the plug-in gear rim in the longitudinal direction of the connecting section. The decrease in the rigidity of the section made in the form of a hollow profile in the longitudinal direction of the common connecting section is based on the fact that, under a tensile load, the teeth of the plug-in gear rim experience elastic tension in the longitudinal direction of the connecting section more than it would be if the end section of the load input element was completely made.

In the case of a compressive load, first of all, there is also a reduced rigidity of the end section of the load input element in the longitudinal direction of the common connecting section. This reduced stiffness under compressive load occurs, in particular, when the hollow profile section is inserted into the toothed rim in the longitudinal direction of the common connecting section, not to the stop, but between the front side of the hollow profile facing the load input element. section and the base of the plug-in gear ring remains a gap. This gap is primarily filled with adhesive. The teeth primarily have a length that is substantially at least twice the maximum width of the teeth, whereby, both under tensile load and under compressive load, there is a relatively large elastic expansion capacity of the insert toothed rim in the longitudinal direction. direction of the common connecting section. First of all, with a tensile load on the lever of the running gear, due to the relatively thin teeth, a reduction in the stresses arising in the adhesive layer can be achieved. This is also the case in the presence of a compressive load, if there is a gap described earlier. The teeth are made, first of all, in one piece with the load input element. The longitudinal extent of the connecting section in its longitudinal direction, first of all, corresponds to the immersion depth with which the section made in the form of a hollow profile is inserted into the plug-in gear rim of the load input element. In this case, the section made in the form of a hollow profile, as already explained, can be inserted into the plug-in gear in the longitudinal direction of the connecting section up to the stop or be located at a distance from this maximum position due to the previously described gap. The insertion gear is particularly advantageous under tensile and/or compressive loading, and is also advantageous under torsion and/or bending loading.

In the context of the present invention, a running gear arm is to be understood as a rod-like or other structural element elongated in one or more spatial directions suitable for transmitting forces and/or moments. The undercarriage arm may be, for example, a two-, three-, four- or five-point arm, the two-point arm being, for example, a reaction arm or a torque arm. The running gear lever is primarily subjected to tensile and/or compressive forces, which are introduced into the hollow section through the load input element(s). In addition, bending and/or torsional moments may be applied to the undercarriage arm. This can be the case, for example, when the undercarriage arm is a reactive linkage which, in the driving mode, is subject to both tensile and compressive loads caused by acceleration and deceleration processes and also bending and torsional loads caused by the rolling movements of the vehicle body. funds. The undercarriage arm is primarily a composite undercarriage arm, i.e. a undercarriage arm assembled from several separately manufactured parts. This type of construction has the advantage over a monolithic undercarriage arm in that, for example, the hollow profile section can be produced in variable lengths, whereby different variants of the undercarriage arm can be implemented in a modular manner. The section made in the form of a hollow profile primarily has a cross-sectional shape that differs from the shape of the ring, since the sections made in the form of a hollow profile with a cross section in the form of a ring can only be held in the circumferential direction under torsional load by means of an adhesive . On the other hand, cross-sectional shapes that differ from the ring shape, if the end section of the load input element has support areas that are conjugated in shape, are additionally supported in the circumferential direction also by positive locking. The section made in the form of a hollow profile preferably has a non-circular cross-sectional shape.

In the present case, a load input element is to be understood as an element which, in order to perform a technical function, is connected to a section made in the form of a hollow profile and can introduce work loads, such as forces and/or moments, into the section made in the form of a hollow profile. Under the section made in the form of a hollow profile in connection with the present invention is to be understood a section of an endless profile. The wall thicknesses of the section made in the form of a hollow profile are significantly smaller in comparison with its cross section. The wall thicknesses of the section made in the form of a hollow profile, if it has a geometric cross-sectional shape, which can be described at least essentially adjacent to the outer surfaces of the square, preferably, are 10-20%, particularly preferably 10-15%, of the outer the dimensions of the section made in the form of a hollow profile. When viewed in cross section, the section made in the form of a hollow profile has at least one cavity, which is made in the form of a chamber closed along the contour. The section made in the form of a hollow profile, first of all, has a constant geometric cross-sectional shape along its longitudinal extent. In this case, the section made in the form of a hollow profile can be made straight or curved along its longitudinal extent. Alternatively, the section made in the form of a hollow profile, along with a bearing cross section that is constant along its longitudinal extent, can have additional elements integrating the function, which also extend along the entire length of the section made in the form of a hollow profile or only along a partial length. However, in the latter case, the cross-sectional area of the hollow-profile section containing the function-integrating elements is first formed, in particular also along its entire length, and then, if necessary, is separated, for example, by sawing. Function-integrating elements can serve, for example, to connect pipes or hoses for transporting liquids, or serve as holders for cables, or as holders for sensors or actuators, or as carriers for electronic components, for example, to detect faults, or as planes of the joint of the bolted joint.

The load input element first of all has an opening oriented transversely to the longitudinal direction of the connecting section. This hole can be made in the form of a bowl with a hole, for example, to accommodate the hinged sphere of the ball pin of the ball joint. Alternatively, the opening can also be made in the form of a through hole, for example with a cylindrical through hole for receiving a molecular hinge, also called a gripping hinge (Pratzengelenk). In the mounted state, the through hole has, above all, an unfinished inner peripheral surface. Alternatively, the load input element may have a through hole which, in the primary state, has an unmachined inner peripheral surface, but which, in the mounted state, has a finished, machined inner peripheral surface. A steel bushing may be inserted into the through hole. If the section made in the form of a hollow profile is made straight, then the longitudinal direction of the connecting section corresponds to the longitudinal direction of the section made in the form of a hollow profile. If the section made in the form of a hollow profile is curved, then the longitudinal direction of the connecting section corresponds to the longitudinal direction of the tangent, which is adjacent to the end section of the section made in the form of a hollow profile. Also, if the hollow section is curved, the longitudinal directions of the end section of the hollow profile section, the end section of the load input element, and the connecting section are at least substantially the same in order to provide at least relatively uniform transmission of forces and/or moments between the load input element and the section made in the form of a hollow profile.

The length of the connecting section primarily corresponds essentially to the outer dimension of the cross section of the hollow profile. As a result, there is a relatively large length of the connecting section. This has an effect, above all, under loads on the running gear lever at elevated temperatures, when the adhesive softens somewhat under the influence of temperature and, as a result, becomes more elastic. In this case, if the running gear arm is subjected to a tensile load, the adhesive bond is also loaded in the region of the tooth roots. Thus, the relatively large length of the connecting section is, in a way, a reserve of load capacity at relatively high ambient temperatures. The significantly longer length of the connecting section no longer significantly increases the load-bearing capacity of the connection between the load input element and the section made in the form of a hollow section. A significantly shorter length of the connecting section leads to a decrease in the bearing capacity. The wording that the end section of the load input element and the end section of the section made in the form of a hollow profile fit into each other "at least essentially" with a positive fit, expresses that both end areas do not directly adjacent to each other, at least at least not over the entire surface, but have a slight distance from each other, and this small distance is filled with an adhesive distributed, first of all, over the entire surface.

The fiber-reinforced section made in the form of a hollow profile is primarily a pultrusion section, that is, a section made in the form of a pultrusion made in the form of a hollow profile. The pultrusion process is a method for economically manufacturing fiber-reinforced polymer profiles in a continuous process. The section made in the form of a hollow profile primarily has reinforcing fibers that are distributed over the entire cross section of the profile and which extend in the longitudinal direction of the profile, thereby achieving high rigidity and strength in this direction. For a design solution that prevents the formation of kinks and bulges in the section made in the form of a hollow profile, relatively large proportions of elongated fibers are preferably located in the extreme regions of the cross section of the profile and at the same time also extend in the longitudinal direction of the profile. All fibers are oriented primarily in the longitudinal direction of the section made in the form of a hollow profile. In a preferred form, the section made in the form of a hollow profile has a fiber content of about 65% by volume in order to simultaneously achieve high rigidity in the longitudinal direction of the profile and at the same time high flexural strength, as well as good transmission of force by the fibers in the section made in the form of a hollow profile. . In general, a fiber content of 50% to 75% by volume is possible.

In the section made in the form of a hollow profile, both carbon, glass and aramid fibers, as well as natural fibers, which are respectively embedded in a polymer matrix, can be used. The matrix system preferably consists of a vinyl ester resin, since with very good chemical and mechanical properties it can be well processed by the pultrusion process. In addition to this, vinyl ester resin has good adhesion in combination with some important adhesives. Alternatively, epoxy resin, polyester resin, phenol resin, or polyurethane resin may be used as the matrix material. The adhesive plug connection primarily contains an epoxy adhesive. Alternatively, other adhesives can also be used, such as, for example, methyl methacrylate adhesives. The hollow profile portion specially designed for increased torsional loads can be formed in the pultrusion process by inserting, weaving or rolling up fibers or fabrics that are directed at an angle of ±45° to the longitudinal direction of the hollow profile portion and at the same time integrated into walls made in the form of a hollow section section. In addition, the pulwinding process, which combines a pultrusion process and, additionally, a winding process, can also be used to produce the section made in the form of a hollow profile.

The end section of the load input element and the end section of the section made in the form of a hollow profile form, first of all, the free ends of the load input element or the section made in the form of a hollow profile. The load input element may be part of the ball bearing of the undercarriage arm, or alternatively it may serve to connect two or more hollow sections, or it may be part of the ball joint of the undercarriage arm and at the same time serve to connect two or more hollow sections plots. The section made in the form of a hollow profile in the region of the connecting section is first of all at least partly visible, that is, partly forms the outer peripheral surface of the connecting section. The areas in which the hollow section forms the outer peripheral surface of the connecting section are located primarily flush with the areas in which the end section of the load input element forms the outer peripheral surface of the connecting section. The adhesive first of all at least partially forms the outer peripheral surface of the connecting section.

The teeth of the inserted ring gear are preferably glued partly to the outer peripheral surfaces and partly to the inner peripheral surfaces of the end section of the section made in the form of a hollow profile. Since the section made in the form of a hollow profile has a significantly larger surface compared to a massive section with a solid profile with the same cross-sectional area, the input of force into the fibrous composite of the section made in the form of a hollow profile can be carried out through an increased joint surface. By increasing the bonding area between the end section of the load input element and the end section of the section made in the form of a hollow profile, an increased load capacity of the undercarriage arm is achieved. In addition, by additionally using the inner peripheral surfaces of the end portion of the hollow profile portion, a more uniform loading of the hollow profile portion is achieved. Since, above all, the separation of the surface of the section made in the form of a hollow profile, consisting of a fiber-reinforced polymer, is the cause of the failure that has occurred, due to the increased surface of the section made in the form of a hollow section, which is increased in comparison with the massive, continuous cross section, a large load. The case of failure described at the outset due to tearing off of the edge layer at the end of the hollow profile can thus be avoided or at least substantially transferred to significantly higher load ranges.

In addition, in particular, if it has a relatively large number of teeth, the insertion gear causes a force to be transmitted predominantly positively to relatively many surfaces of the hollow section section when subjected to a bending load on the running gear component. This is based on the fact that the teeth, at their free ends facing the section made in the form of a hollow profile, have a certain pliability perpendicular to the longitudinal direction of the connecting section. In this way, with a bending load, a noticeable reduction of the local excess stresses described at the beginning is achieved at the transition from the glued end section of the section made in the form of a hollow profile to the free area of the section made in the form of a hollow section. The proposed design of the end section of the load input element in combination with the design of the end section of the section made in the form of a hollow profile with relatively small wall thicknesses and at least one cavity in the section made in the form of a hollow profile creates conditions for uniform load input and for load distribution on the connecting plot. In contrast to thick-walled profiles, the load on the connecting section is distributed through the outer layer of the section made in the form of a hollow profile inside its walls or vice versa from the section made in the form of a hollow profile through its surface onto the teeth of the load input element. Under a bending load on the hollow profile section, the connecting surfaces of relatively many teeth in the region of the connecting section create the conditions for the transfer of force, so to speak, with positive locking and for the resulting significant reduction in stress peaks.

Due to at least one cavity, the section made in the form of a hollow profile has a closed cross section, as a result of which a relatively large moment of inertia of the area and, at the same time, a relatively large moment of inertia during torsion are provided. In addition, the inserted ring gear has at least five teeth, at least one of which enters at least one cavity of the section made in the form of a hollow profile. The inner surfaces of the cavity, especially the chamber, are primarily the inner peripheral surfaces of the end section of the section made in the form of a hollow profile, with which the teeth of the plug-in gear rim are glued. At least four other teeth surround the end section of the section made in the form of a hollow profile. In this case, for example, if the section made in the form of a hollow profile is in the simplest case made in the form of a rectangular or square tube, then four other teeth adjoin, first of all, to four, offset from the point of view of the geometric shape of the cross section, respectively, by approximately 90 ° to the outer sides made in the form of a hollow profile section. In this regard, all outer peripheral surfaces of the section made in the form of a hollow profile can be surfaces that are wetted when the section made in the form of a hollow profile is completely immersed in a water reservoir with a previous seal of at least one chamber closed along the contour. The plug-in toothed rim surrounds the end section of the section made in the form of a hollow profile, first of all, only in parts, first of all, in such a way that the end section of the section made in the form of a hollow profile is partially located freely along the contour.

The end section of the load input element is preferably pierced in the form of a grid by extending perpendicular to the longitudinal direction of the connecting section and at the same time, at least partially intersecting passage grooves. Thus, the imaginary massive, solid cross-section of the end section of the load input element is reduced by the material of the through-slots. Since the traverse slots penetrate the end section of the grid-like load insertion element, the teeth of the insertion ring gear represent the remaining material. The reduced rigidity of the end section of the load insertion element, which is made of metallic material, as a result of this, when glued to the end section of the section made in the form of a hollow profile, consisting of a fiber-reinforced polymer, is preferable for the reasons already mentioned. The passage slots intersect, advantageously, at an angle of substantially 90°. In order to form a lattice-like structure, the passage slots primarily extend in two directions. First of all, several passage slots extend parallel to each other in each of both directions perpendicular to the longitudinal direction of the connecting section. In addition, the passage grooves that extend in the same direction perpendicular to the longitudinal direction of the connecting section are preferably made geometrically the same.

The teeth of the inserted ring gear primarily have, along their longitudinal extension in the longitudinal direction of the end section of the load input element, a rectangular or square solid cross section, the longitudinal direction of the end section being advantageously identical or at least substantially identical to the longitudinal direction connecting area. The through slots are primarily at least partially straight in shape in the longitudinal direction of the end portion of the load input element. This means that some through-slots may be straight and others may not. The longitudinal directions of the connecting section, the end section of the load input element and the end section of the section made in the form of a hollow section, first of all, are exactly aligned when applied, or at least substantially aligned when applied. The teeth of at least two of the four longitudinal sides extending in the longitudinal direction of the end section of the load input element of the longitudinal sides, first of all, border on the through grooves. The teeth can adjoin the passage slots, in particular by two, three or four longitudinal sides extending in the longitudinal direction of the end section of the load input element. The wording, according to which the end section of the load input element is pierced in the form of a lattice of through-slots, which extend perpendicular to the longitudinal direction of the connecting section and which at the same time at least partially intersect, expresses that not every through-slot has to intersect with each of the others. passage grooves.

According to an alternative, the passage grooves at least partially have an extension in the longitudinal direction of the connecting section that differs from the rectilinear extension. In this case, the passage grooves, which run perpendicular to the longitudinal direction of the connecting section and at the same time parallel to each other in the same direction, preferably have an extension different from the rectilinear extension. Then the extent of these passage grooves differs from the rectilinear extent, first of all, in the same way. In addition, these passage grooves are made, first of all, geometrically the same. The through grooves, which have an extension different from the linear extent, primarily have unfinished surfaces. The through grooves, which have an extension different from the rectilinear extent, have in the longitudinal direction of the connecting section, first of all, a curved shape with a constant radius of curvature, which mainly corresponds to the radius of curvature of the end section intended for them, made in the form of a hollow section section. In this way, the curved, hollow-profile portions can be connected without problems to the end portions of the load input elements. The through grooves, which have a length different from the rectilinear extent, primarily extend in the area of the tooth roots exactly in the longitudinal direction of the connecting section and deviate slightly from this direction towards the ends of the teeth. Therefore, with such an embodiment, it can also be said that the through-grooves, which have an extension different from the rectilinear extent, also extend in the longitudinal direction of the connecting section.

The passage grooves extending perpendicular to the longitudinal direction of the connecting section preferably have a constant width in the first direction and a varying width in the second direction extending perpendicular to the first direction. In this case, all through-grooves that extend perpendicularly to the longitudinal direction of the connecting section in the same direction are made, first of all, of the same type, that is, they have a constant or varying width. The through grooves with a constant width primarily have a machined, advantageously machined, in particular milled, surface. Through-grooves with varying widths primarily have an unfinished, in particular pressed, surface, whereby there are no machining costs. Through grooves with varying widths have, in particular, an increased width in the region of the roots of the tooth and/or in the region of the free ends of the teeth. The free ends of the teeth facing the hollow profile section expediently have a minimum cross-sectional area perpendicular to the longitudinal direction of the connecting section. This is understood to mean that the teeth of the insertion gear have, in relation to their shape in the longitudinal direction of the connecting section, the smallest cross-sectional area at their free ends. For this reason, the teeth have at their free ends an additionally reduced rigidity in the longitudinal direction of the connecting section. The free ends of the teeth facing the section made in the form of a hollow profile, first of all, have a greater distance from each other perpendicular to the longitudinal direction of the connecting section in at least one direction of extension than is the case in at least one other area in the longitudinal direction of the connecting section. site. This is primarily based on the fact that the passage grooves with varying widths have an increased width in the area of the free ends of the teeth. The adhesive, by means of which the end section of the load input element is connected to the end section of the section made in the form of a hollow profile, at least partially has, especially in the region of the free ends of the teeth, an increased layer thickness. Thus, due to the increased thickness of the adhesive layer, the stresses in the adhesive layer are locally reduced and distributed more evenly over the entire connecting area.

To further reduce the rigidity of the end section of the load input element in the longitudinal direction of the connecting section, the free ends of the teeth facing the section made in the form of a hollow profile preferably have at least partially located on the front side, made concave and open towards the section made in the form hollow profile section of the excavation. The passage grooves with varying widths primarily have a minimum width along their longitudinal extension in the longitudinal direction of the connecting section in the middle part of the end section of the load input element.

To further reduce the rigidity of the end section of the load input element in the longitudinal direction of the connecting section, the teeth of the plug-in gear rim on the tooth legs, on which the teeth pass into the solid material of the load input element, are preferably made at least partially tapered. The legs of the teeth are made tapering, first of all, on their longitudinal sides, which border on the through grooves with varying width. Since the section made in the form of a hollow profile has a constant cross section along its longitudinal extent, an at least partially thickened adhesive layer is obtained in the region of the tooth roots. The widened spaces between the teeth in the region of the tooth roots, which are obtained by means of the tapered tooth roots, are first of all filled with an adhesive. Thus, due to the increased thickness of the adhesive layer, the stresses in the adhesive layer are locally reduced and are distributed more evenly over the entire connecting area.

At least one tooth of the inserted ring gear is advantageously made continuously tapering along its longitudinal extent towards the section made in the form of a hollow profile. This should be understood to mean that at least one tooth has a maximum cross-sectional area at its tooth pedicle, which gradually tapers towards its free end, in order to finally have a minimum at its free end. Thus, at least one tooth has, perpendicular to the longitudinal direction of the connecting section, at the same time a stiffness gradually decreasing in the direction of its free end in the longitudinal direction of the common connecting section. The smooth tapering of at least one tooth also contributes to a smooth change in the stiffness characteristics in the longitudinal direction of the common connecting section. At least one tooth gradually tapering towards the section made in the form of a hollow profile is, first of all, an angular tooth with two longitudinal sides extending in the longitudinal direction of the end section of the load input element, which border on the through grooves.

According to an improvement of the invention, the load input element has a plurality of end sections having a plug-in toothed rim for accommodating several end sections from several sections made in the form of a hollow profile. In this case, the longitudinal directions of the individual end sections can have an angle of 90° relative to each other or an angle different from 90°. The two longitudinal directions of the individual end sections can in particular have an angle of 180° relative to each other, in particular when the load input element serves inter alia or exclusively to connect at least two hollow profiles to one another. site.

All of the teeth of the insertion ring preferably have two unfinished longitudinal sides which extend at least substantially in the longitudinal direction of the connecting section. Since the end section of the load input element and the end section of the section made in the form of a hollow profile, first of all, do not directly abut each other, at least not over the entire surface, but have a small tolerance-compensating distance from each other, it is sufficient and furthermore, it is also economical to leave the longitudinal sides of the teeth at least partially unfinished.

The load input element is preferably made in the form of a section of a profile, in particular a section of an extruded profile, with unfinished outer peripheral surfaces and/or inner peripheral surfaces that extend in the longitudinal direction of the profile. This has the advantage that a relatively advantageous bar material can be used as the starting material for the load input element. As an alternative to the pressed profile section, for example, a cold-drawn or rolled profile section is also possible. In this regard, all the outer peripheral surfaces of this section of the profile can be surfaces that are wetted when the section of the profile is completely immersed in a reservoir with water with a previous seal of any cavities. The inner peripheral surfaces in the presence of longitudinally extending sections of the profile of the cavities are other surfaces. Under the section of the profile in connection with the present invention should be understood as a section of the infinite profile. First of all, the section of the profile has a constant geometric shape of the cross section along its longitudinal extent. Alternatively, the profile section, in addition to the load-bearing cross section that is constant along its longitudinal extent, can have additional function-integrating elements that also extend along the entire length of the profile section or only along a partial length. First of all, however, in the latter case, the cross-sectional area of the profile section containing the function-integrating elements is first also formed along its entire length, and then, if necessary, is separated, for example, by sawing. Function-integrating elements can serve, for example, for connecting pipes or hoses for transporting fluids, or as cable holders, or as holders for sensors or actuators, or as carriers for electronic components, for example, for fault detection, or as planes of the joint of the bolted joint.

According to an alternative embodiment of the invention, the first load input element has a first longitudinal profile direction, and the second load input element has a second longitudinal profile direction that differs from the first longitudinal profile direction. The first longitudinal profile direction and the second longitudinal profile direction primarily have an angular displacement of 90°. To implement a three-point suspension arm, two first load input elements and one second load input element may be provided, as previously described.

According to another alternative, the insertion ring gear of the load insertion element with teeth extending at least substantially in the longitudinal direction of the connecting section has through grooves that extend at an angle other than 90° to the longitudinal direction of the profile of the load insertion element. Such end sections of load insertion elements with through grooves, which extend at an angle different from 90° to the longitudinal direction of the profile of the load insertion element, are suitable, in particular, for connecting sections made in the form of a hollow profile, which also extend at an angle different from 90 ° to longitudinal direction of the load input element profile. In this case, the end surfaces of the section made in the form of a hollow profile, which are facing the base of the plug-in toothed rim of the load input element, also extend in at least one direction at an angle different from 90° to the longitudinal direction of the section made in the form of a hollow profile. The through grooves, which extend at an angle other than 90° to the longitudinal direction of the profile of the load input element, are primarily machined, especially milled or sawn, through grooves.

An angle other than 90° can be, for example, 60°, 70° or 80°, where the definition that the teeth of the insertion gear extend at least substantially in the longitudinal direction of the connecting section should also apply here. With such an embodiment, the passage grooves primarily extend partly at an angle different from 90° to the longitudinal direction of the profile of the load input element and partly at an angle of exactly 90°. The last-named through-grooves, which extend at an angle of exactly 90° to the longitudinal direction of the profile of the load input element, preferably have unfinished surfaces, such as those resulting from a pressing process. The end portions of the load insertion elements with through slots that extend at an angle other than 90° to the longitudinal direction of the profile of the load insertion element may have sawn outer surfaces that also extend at an angle other than 90° to the longitudinal direction of the load insertion element profile. These sawn outer surfaces result from bevel sawing of the load input element from the shaped bar. In this case, both the passage grooves and the aforementioned outer surfaces preferably extend at the same angle, different from 90°, to the longitudinal direction of the profile of the load insertion element.

The section made in the form of a hollow profile is preferably made in the form of a section with a multi-chamber profile. This means that, when viewed in cross section, the section made in the form of a hollow profile has at least two cavities made in the form of chambers closed along the contour. Due to the section with a multi-chamber profile, depending on the geometric structure and the arrangement of several chambers relative to each other, the moment of inertia of the area for the section made in the form of a hollow profile can be increased. This has an effect especially under bending and/or torsional loading, but also under compressive loading, in that higher forces and/or moments can be transmitted. The section with a multi-chamber profile has in cross section, first of all, at least one transverse partition, by means of which several chambers of the section with a multi-chamber profile are separated from each other. When gluing the end section of the section made in the form of a hollow profile with the end section of the load input element, the transverse partition creates conditions for the formation of additional connecting surfaces, which act in a leveling manner on the distribution of stresses in the adhesive layer. If necessary, a section with a multi-chamber profile may have more than one transverse partition.

Viewed in cross section, the hollow section preferably has at least one outwardly spaced rib to increase bending stiffness or torsional stiffness and/or bending stiffness. This at least one rib, first of all, forms a rectangular or square partial cross section in the cross section of the section made in the form of a hollow profile. The at least one outwardly spaced rib makes it possible to increase the bonding surface between the end section of the load input element and the end section of the section made in the form of a hollow profile. At the same time, at least one outwardly spaced rib contributes to an increase in the section made in the form of a hollow profile, the moment of inertia of the area and the moment of inertia during torsion. The longitudinal side of the rib forms, first of all, the outer surface of the connecting section. The rib extends primarily in the longitudinal direction of the connecting section between the two teeth of the plug-in gear rim. If several ribs are located on one side of the cross-section of the section made in the form of a hollow profile, then recesses appear between these ribs, which makes it possible that other teeth of the inserted ring gear can enter these additionally created surfaces of the section made in the form of a hollow profile. Viewed in cross section, the hollow profile portion primarily has at least four outwardly spaced ribs. Two of these at least four ribs are located in relation to the cross section of the section made in the form of a hollow profile, first of all, located in pairs diagonally opposite each other.

Viewed in cross section, the section made in the form of a hollow profile expediently has thin thickenings protruding from its outer and/or inner peripheral surfaces, with the help of which the end section of the load input element and the end section of the section made in the form of a hollow profile are kept at a minimum distance each from friend. These thickenings extend in the form of strips, especially in the longitudinal direction of the section made in the form of a hollow profile along its entire length. The thickenings serve, on the one hand, to achieve a minimum layer thickness and, on the other hand, to obtain a uniform thickness of the adhesive layer, which connects the end section of the load input element and the end section of the section made in the form of a hollow profile. The thickenings primarily have spacer surfaces facing the end section of the section made in the form of a hollow profile, which can contact the end section of the section made in the form of a hollow profile or be located at a small distance from it. More precisely, in this way, the surfaces of the end section of the section made in the form of a hollow profile, which are outside the thickenings, are kept at a minimum distance from the end section of the load input element. When the end section of the section made in the form of a hollow profile is introduced into the end section of the load input element, the bulges are primarily guiding surfaces. The thickenings protrude from the outer and/or inner peripheral surfaces of the section made in the form of a hollow profile, first of all, by less than 0.5 mm. Viewed in cross-section of the hollow section, the bulges extend in particular by less than 5 mm parallel to the respective outer and/or inner peripheral surfaces and are thus kept relatively narrow. If the bulges are too narrow, there is a possibility that when the end section of the hollow section is inserted into the end section of the load insertion element, they will be pressed out. If the bulges are too wide, the adhesive connection between the end section of the load input element and the end section of the hollow profiled section can be adversely affected, since the optimal thickness of the adhesive layer in the area of the bulges is not achieved.

Within the connecting section, at least one intermediate space between two teeth is advantageously filled exclusively with adhesive. At the same time, this adhesive is primarily a part of the outer peripheral surface of the joint section. The adhesive is located primarily between at least two teeth in a constant width through-slot. First of all, when such a continuous width groove is milled or propylene, it is proposed to make this passage groove extending perpendicular to the longitudinal direction of the connecting section in order to avoid increased processing costs, for example, due to plunge milling. If during the continuous production of the through-slot there is an intermediate space between two teeth, which is not filled by the end section of the section made in the form of a hollow profile, for example, by the rib of this end section, it is recommended to fill this intermediate space with an adhesive in order to protect the intermediate space in motion from contamination and in in certain cases also against corrosion due to dirt, dust, water splashes, salt sprinkled on roads, etc. The intermediate space is first of all filled in such a way that the adhesive overlaps it flush with the outer perimeter of the connecting section.

In the following, the invention will be explained in more detail with the aid of the drawings, which are merely exemplary, wherein the same reference symbols refer to the same, like and functionally the same parts and elements. This is shown in:

Fig. 1 is a partial perspective view of a running gear arm according to a first embodiment of the invention,

Fig. 2 shows the load input element of the undercarriage arm according to FIG. 1 in perspective,

Fig. 3 the load input element according to FIG. 2 in side view,

Fig. 4 the load input element according to FIGS. 2 and 3, rotated by 90° with respect to the image in FIG. 3 side view,

Fig. 5 the load input element according to the second embodiment of the invention in side view,

Fig. 6 the running gear lever according to FIG. 1 in the image with a section according to the section line A-A indicated there,

Fig. 7 the running gear lever according to FIG. 1 in a sectional view as shown in FIG. 6 lines of V-V section,

Fig. 8 the running gear lever according to FIG. 1 in the image with a section according to the section line C-C indicated there,

Fig. 9 the load input element according to the third embodiment of the invention in a perspective view,

Fig. 10A-10B, respectively, the load input element according to other embodiments of the invention in top view,

Fig. 11 a running gear arm according to a second embodiment of the invention in a perspective view, and

Fig. 12 is a running gear arm according to a third embodiment of the invention in a perspective view.

In FIG. 1 shows a running gear arm 1 which is designed as a two-point lever and is also referred to as a reaction arm. The lever 1 of the running gear has a pultrusion section 2 made in the form of a hollow profile, consisting of a fiber-reinforced polymer, and two elements 3 of the load input, consisting of aluminum, and made in the form of a hollow profile section 2 and the elements 3 of the load input are connected to each other respectively on common connecting sections 4 by means of one-piece adhesive plug-in connections 5. In each of the two plug-in connections 5, the end section 6 of the load input element 3 and the end section 7 of the section 2 made in the form of a hollow profile reciprocally and essentially form a positive fit into each other. The end section 6 of the load input element 3 has a plug-in gear rim 8 with twelve teeth 10 extending in the longitudinal direction 9 of the common connecting section 4, due to which the rigidity of the end section 6 of the load input element 3 in the longitudinal direction 9 of the common connecting section 4 is reduced. In a common connecting section 4, the end section 7 of the section 2 made in the form of a hollow profile and the end section 6 of the load input element 3 are connected to each other over the entire surface and without cavities by means of an adhesive 11. The hardened adhesive 11 is shown separately for illustrative explanation in the depicted in the form of the end of the lever 1 of the running gear broken into its component parts. The adhesive 11 has an average layer thickness of only about 0.5 mm, on which, among other things, the previously described overlapping of the end section 6 of the load input element 3 and the end section 7 of the section 2 made in the form of a hollow profile is based, in essence with positive locking. Since section 2 made in the form of a hollow profile is made straight in this case, the longitudinal direction 9 of the connecting section 4 corresponds to the longitudinal direction 12 of section 2 made in the form of a hollow profile.

Shown in FIG. 2 alone, the load input element 3 is designed as a section of an extruded profile which extends in the form of a column in the longitudinal direction 13 of the profile. The load input element 3 is made by sawing off a bar material profile pressed in the longitudinal direction 13 . The outer peripheral surfaces of the load input element 3 extending also in the longitudinal direction 13 of the profile are unfinished and correspond to the state of the surface of the pressed bar material. One of the two generally sawn surfaces is provided in accordance with DIN EN ISO 1302 with a designation for the surface machined with material removal (symbol with a closed triangle). The raw surface of the load input element 3, which is not subjected to material removal and at the same time is the surface of a pressed, bar-shaped raw material, is similarly indicated by a symbol that contains an open triangle with an inscribed circle. In addition to the plug-in gear 8, the load input element 3 has a through hole 14 for accommodating a not shown molecular hinge. The end section 6 of the load input element 3 is pierced in the form of a grid by passage grooves 15 extending perpendicular to the longitudinal direction 9 of the connecting section 4 and at the same time partially intersecting passage grooves 15. Due to the aluminum remaining between the passage grooves 15, teeth 10 are made. The plug-in gear rim 8 has four angular teeth 10, which, in order to further reduce the stiffness along their longitudinal extent towards the section 2 made in the form of a hollow profile, are made gradually tapering. Each of the four corner teeth 10 has four surfaces extending in the longitudinal direction 9 of the connecting section 4, which form the perimeter of each of the corner teeth 10 in this direction. , molded in the form of a bar of the source material. The two through slots 15 which extend in the first direction 16 are made by milling with a disc cutter and have a constant width. The three passage grooves 15 which extend in a second direction 17 which is oriented perpendicular to the first direction 16 and coincides with the longitudinal direction 13 of the profile are pressed passage grooves 15 of a bar-shaped starting material and have a varying width.

In the first direction 16, the teeth 10 of the inserted ring gear 8 are made on tooth legs 18, on which the teeth 10 merge into the solid material of the load input element 3, tapering. Free, facing made in the form of a hollow section 2, the ends 19 of the teeth have a minimum cross-sectional area perpendicular to the longitudinal direction 9 of the connecting section 4. The passage grooves 15 extending in the second direction 17 with varying widths have an increased width in the area of the tooth legs 18 and in the area of the free ends 19 of the teeth 10 in the first direction 16 . It can be seen that the angled teeth 10 have on their tooth legs 18 a maximum cross-sectional area which tapers smoothly towards their free ends 19. and the free ends 19 of the teeth 10, the passage grooves 15 with varying widths have a minimum width in the first direction 16. In the longitudinal direction 9 of the connecting section 4, the teeth 10 have a length which, for the individual teeth 10, is approximately twice the maximum width of these teeth 10. However, for the majority of the teeth 10, this length is substantially greater than their maximum width.

In FIG. 3, it can be seen that the load insertion element 3 has, on its connecting section 4, which is viewed in the longitudinal direction 9, opposite the plug-in gear rim 8, an integrating element 21, which is designed as a cable holder. The contour of the perimeter of the function-integrating element 21 is pressed and is no longer processed, which follows from the previously described symbol with an open triangle and an inscribed circle. The legs 18 of the tooth extend approximately 10 mm in the longitudinal direction 9 of the connecting portion 4. The middle portion 20 extends approximately 25 mm and the free end 19 of the teeth 10 approximately 10 mm in the same direction. The total length of the teeth 10, which is approximately 45 mm, corresponds in the same direction as previously measured to essentially the length of the end section 6 of the load input element 3 . When measured in the first direction 16, the three through-slots 15 with varying widths have at their base, which at the same time corresponds to the base 24 of the ring gear 8, a maximum width of approximately 8.5 mm. At the middle section 20, approximately 7 mm and at the free end 19 of the teeth 10, approximately 7.75 mm. In this view, it can also be clearly seen that in order to further reduce the rigidity of the end section 6 of the load input element 3 in the longitudinal direction 9 of the common connecting section 4, the teeth 10 of the inserted ring gear 8 are made tapering on their tooth legs 18 in the first direction 16. In addition, with using the above symbol with an open triangle and an inscribed circle, it is indicated that all the teeth 10 of the plug-in gear rim 8 each have two raw pressed longitudinal sides that extend essentially in the longitudinal direction 9 of the connecting section 4. To further reduce the rigidity of the end section 6 of the load input element 3 in the longitudinal direction 9 of the common connecting section 4, the free ends 19 of the teeth 10 facing the section 2 made in the form of a hollow profile partially have recesses 23 that are formed concave on the end side and open towards the section 2 made in the form of a hollow profile.

From FIG. 4, it can be understood that both feed slots 15 of the load input element 3, having a constant width in the second direction 17, in the present case approximately 7 mm, have a machined surface, which is indicated by the aforementioned closed triangle symbol. In this exemplary embodiment, the second direction 17 is identical to the longitudinal direction 13 of the profile. In the initial state indicated by the dash-dotted lines, the function integrating element 21 is made in the longitudinal direction 13 of the profile along the entire length of the load input element 3 in the second direction 17. In the depicted finished state of the load input element 3, two symmetrically located regions of the initial state are removed using the cutting process. The relevant surface information is labeled in the same way as previously described.

In FIG. 5 shows a load input element 3 with an insertion gear 8 with teeth 10 extending substantially in the longitudinal direction 9 of the connecting section 4. In this case, the insertion gear 8 has milled through grooves 15 with a constant width in the second direction 17, which extend under the same different from 90° by an angle α to the longitudinal direction 13 of the profile of the load input element 13, as well as the longitudinal direction 9 of the connecting section 4. The load input element 3 has sawn outer surfaces, which result from the oblique sawing of the load input element 3 from the profile bar, extend under the same different from 90° angle α to the longitudinal direction 13 of the profile, as well as milled through grooves 15, and are indicated by the previously described symbol with a closed triangle. In addition, the load input element 3 has, not shown, raw through-grooves 15 with varying widths in the first direction 16, which have pressed surfaces and extend in the longitudinal direction 13 of the profile.

In FIG. 6 shows a load input element 3, wherein the teeth 10 of the insertion gear 8 have a rectangular solid cross-section along their longitudinal extension in the longitudinal direction 9 of the connecting portion 4. The four corner teeth randomly have a square solid cross section in the selected sectional plane as a special shape of the rectangular solid cross section. The two end regions of both 16 first-extending grooves 15 with a constant width are filled with an adhesive 11 which forms the outer peripheral surfaces of the connecting section 4 in these four areas. In other words, in the present case, within the connecting section 4, four two teeth 10 are filled exclusively with adhesive 11. Outside these intermediate spaces, the thickness of the adhesive layer 11 is on average about 0.5 mm. To increase the bending stiffness, torsional stiffness and bending stiffness of the lever 1 of the chassis, the section 2 made in the form of a hollow profile has six ribs 22 in the present section, spaced outward and at the same time extending in the second direction 17 ribs 22. The end surfaces of these six ribs 22 form partial outer peripheral surfaces of the connecting section 4. In FIG. 6 also shows that the teeth 10 of the plug-in gear rim 8 are partially glued to the outer peripheral surfaces and partially to the inner peripheral surfaces of the end section 7 of the section 2 made in the form of a hollow profile.

In FIG. 7, it can be seen that section 2 made in the form of a hollow profile is inserted into the plug-in toothed rim 8 in the longitudinal direction 9 of the connecting section 4 not until it stops, but between the end side of the section 2 made in the form of a hollow profile and the base 24 of the plug-in toothed rim 8 remains filled with adhesive 11 gap 25.

In FIG. 8 shows a section 2 made in the form of a hollow profile in a section through its end region 7, and the section 2 made in the form of a hollow profile is made in the form of a section with a multi-chamber profile with two chambers 26 closed along the contour. Both chambers 26 are separated from each other by means of a transverse partitions 27. In the assembled state, each of the two chambers 26 is filled with one tooth 10. When considered in the present cross-section, the section 2 made in the form of a hollow profile has thin bulges 28 protruding from its outer peripheral surfaces and from its inner peripheral surfaces. Due to these bulges 28, the end section 6 of the load input element 3 and the end section 7 of the section 2 made in the form of a hollow profile are kept at a predetermined minimum distance from each other. The thickenings 28 extend not only along the end section 7 of the pultruded hollow section 2, but also in the form of a strip along its entire length. In the present case, the bosses 28 protrude from the aforementioned outer or inner peripheral surfaces by approximately 0.3 mm and have a width of approximately 3 mm. With the introduction of the end section 7 made in the form of a hollow section section 2 in the end section 6 of the load input element 3, the thickenings 28 are guiding surfaces. In the area of the thickenings 28, the thickness of the layer of adhesive 11 is 0.2 mm on the basis of the calculation, as a result of which it becomes clear that the end section 6 of the load input element 3 and the end section 7 of the section 2 made in the form of a hollow profile mutually enter into each other with only a small clearance, i.e. essentially form-fitting. It should be noted that the inner peripheral surfaces of the section 2 made in the form of a hollow profile are identical to the surfaces of the perimeter of both chambers 26. The already presented six outwardly projecting ribs 22 can also be clearly seen. Between each two ribs 22 located on one side of the cross section made in the form hollow profile of section 2, recesses 29 are made, each of which, in the assembled state, includes a tooth 10 of the plug-in gear rim 8.

In FIG. 9 shows a load input element 3 with two end sections 6 having a plug-in toothed rim for each of them to accommodate one end section 7 of a section 2 made in the form of a hollow profile. Both end sections 6 of the load input element 3 form an angle of 90 ° with each other.

In FIG. 10A shows a load input element 3 with two toothed end portions 6 which have an angle of 180° to each other and are at the same time open in opposite directions. Such a load input element 3 can function, for example, as a connector that connects two sections 2 made in the form of a hollow profile to each other.

In FIG. 10B shows a load input element 3 with three end portions 6 offset by 120° respectively and having a plug-in gear rim, which are in the same plane. The central area of the load input element 3 is provided with triangular, columnar penetrating holes to prevent technologically unfavorable buildup of material in this area.

Shown in FIG. 10B, the load input element 3 has four end portions 6 which are offset by 90° each and which have a plug-in toothed rim and which are in the same plane. The square recesses depicted in the central region of the load input element 3 are also columnar and serve the same purpose as described above.

Elements 3 load input with more than four end sections 6 can be made in the same way as described executions.

The three load input elements 3 mentioned above according to figures 10A-10B are pressed load input elements 3 with a longitudinal profile direction 13 that extends perpendicular to the plane of the drawing.

In FIG. 11 shows a running gear arm 1 which is designed as a three-point suspension arm, which running gear arm 1 has two first load input elements 3 with first longitudinal profile directions 13 which extend in a common plane. The second load input element 3' has a second longitudinal profile direction 13' which extends perpendicular to the common plane in which both first longitudinal profile directions 13 extend. In all three loading elements 3, 3', the longitudinal profile directions 13, 13' coincide with the previously described second directions 17, in which the passage grooves 15 respectively extend with varying widths. As previously described, each of these through grooves 15 has an increased width in the region of the legs 18 of the tooth and in the region of the free ends 19 of the teeth 10 in the first direction 16. The second load input element 3' has two end sections 6 having a plug-in toothed rim for accommodating two end sections 7 from two sections 2 made in the form of a hollow profile.

In FIG. 12 shows the lever 1 of the chassis, which is made in the form of a two-point lever and has two geometrically identical load input elements 3, which are connected to each other by means of a section 2 made in the form of a hollow profile. The section 2 made in the form of a hollow profile is curved and has along constant radius of curvature throughout its longitudinal length. In order that the section 2, which is curved and made in the form of a hollow profile, can be inserted without problems into the inserted gear rims 8 of the load input elements 3, the passage grooves 15 of the inserted gear rims 8 have, in the longitudinal directions 9 of the connecting sections 4, also partly different from the rectilinear extent. In this case, the passage grooves 15 of the plug-in toothed rims 8 specifically have the same radius of curvature as the section 2 made in the form of a hollow profile. section 2 arcuately made in the form of a hollow profile and a chord connecting its ends. The curved passage slots 15 of both load input elements 3 extend in the longitudinal profile directions 13 according to the previously defined definition and, in addition, have unfinished pressed inner surfaces. In addition, the curved passage grooves 15 have along their length in the longitudinal directions 9 of the connecting portions 4 a varying width, as previously described.

LIST OF REFERENCES

1 chassis lever

2 made in the form of a hollow profile section

3 (first) load input element

3' second load input element

4 connecting section

5 plug connection

6 end section of load input element

7 end section made in the form of a hollow section section

8 ring gear

9 longitudinal direction of the connecting section

10 tooth ring gear

11 adhesive

12 longitudinal direction of the section made in the form of a hollow profile

13 (first) longitudinal profile direction

13' second longitudinal profile direction

14 through hole

15 through groove

16 first direction

17 second direction

18 tooth stem

19 loose tooth end

20 middle part of the tooth

21 function integrating elements

22 rib

23 concave molded notch

24 ring gear base

25 clearance

26 camera

27 transverse baffle

28 thickening

29 recess

α other than 90° angle

Claims (18)

1. A structural element (1) for a motorized trackless vehicle, a structural element (1) having a section (2) made in the form of a hollow profile made of a fiber-reinforced polymer and a load input element (3) made of a metallic material, moreover, made in the form of a hollow profile the section (2) and the element (3) of the load input are connected to each other in a common connecting section (4) by means of a permanent, adhesive plug-in connection (5), in which the end section (6) of the element (3) of the load input and the end section (7 ) made in the form of a hollow section section (2) mutually and, at least, essentially with geometric locking, enter into each other, characterized in that the structural element is made in the form of a lever (1) of a running gear for a motorized trackless vehicle, and that the end section (6) of the load input element (3) has a plug-in toothed rim (8) with common connecting rods extending at least substantially in the longitudinal direction (9). th section (4) with teeth (10), due to which the rigidity of the end section (6) of the load input element (3) in the longitudinal direction (9) of the common connecting section (4) is reduced, and the section (2) made in the form of a hollow profile has at least one cavity, which is formed in the form of a chamber closed along the contour, and the plug-in gear rim (8) has at least five teeth (10), of which at least one enters at least one cavity made in the form of a hollow profile plot (2). 2. Structural element (1) according to claim 1, characterized in that the teeth (10) of the plug-in gear rim (8) are glued partly to the outer peripheral surfaces and partly to the inner peripheral surfaces of the end section (7) made in the form of a hollow profile of the section (2). 3. Structural element (1) according to claim 1 or 2, characterized in that the end section (6) of the load input element (3) is pierced in the form of a lattice extending perpendicular to the longitudinal direction (9) of the connecting section (4) and at the same time , at least partially intersecting passage grooves (15). 4. Structural element (1) according to one of paragraphs. 1-3, characterized in that the through grooves (15) at least partially have in the longitudinal direction (9) of the connecting section (4) an extension different from the rectilinear extent. 5. Structural element (1) according to one of paragraphs. 1-4, characterized in that the passage grooves (15) extending perpendicular to the longitudinal direction (9) of the connecting section (4) have a constant width in the first direction (16), and a varying width in the second direction (17) extending perpendicular to the first direction (16). width. 6. Structural element (1) according to one of the preceding paragraphs, characterized in that the free ends (19) of the teeth (10) facing the section (2) made in the form of a hollow profile have a minimum cross-sectional area. 7. Structural element (1) according to one of the preceding paragraphs, characterized in that in order to further reduce the rigidity of the end section (6) of the element (3) for introducing a load in the longitudinal direction (9) of the connecting section (4), the free facing made in the form of a hollow section (2) the ends (19) of the teeth (10) at least partially have recesses (23) located on the end side, made concave and open towards the section (2) made in the form of a hollow profile. 8. Structural element (1) according to one of the preceding paragraphs, characterized in that, in order to further reduce the rigidity of the end section (6) of the element (3) for introducing a load in the longitudinal direction (9) of the connecting section (4), the teeth of the plug-in gear rim (8) on the legs (18) of the tooth, on which the teeth (10) pass into the solid material of the load input element (3), are made at least partially tapered. 9. Structural element (1) according to one of the preceding paragraphs, characterized in that at least one tooth (10) of the inserted ring gear (8) is made constantly tapering along its longitudinal extent towards the section (2) made in the form of a hollow profile . 10. Structural element (1) according to one of the preceding paragraphs, characterized in that the load input element (3) has several end sections (6) having a plug-in gear rim for accommodating several end sections (7) from several sections made in the form of a hollow profile (2). 11. Structural element (1) according to one of the preceding paragraphs, characterized in that all the teeth (10) of the inserted ring gear (8) each have two raw longitudinal sides that extend at least substantially in the longitudinal direction (9) connecting section (4). 12. Structural element (1) according to one of the preceding claims, characterized in that the load input element (3) is made in the form of a section of a profile, in particular a section of an extruded profile, with unfinished outer peripheral surfaces and/or inner peripheral surfaces that extend in longitudinal direction (13) of the profile. 13. Structural element (1) according to claim 12, characterized in that the first load input element (3) has a first longitudinal direction (13) of the profile, and the second load input element (3') has a second longitudinal direction (13) different from the first ) profile longitudinal direction (13') of the profile. 14. Structural element (1) according to claim 12, characterized in that the plug-in gear rim (8) of the load input element (3) with teeth extending at least substantially in the longitudinal direction (9) of the connecting section (4) ( 10) has through grooves (15) which extend at an angle (α) different from 90° to the longitudinal direction (13) of the profile of the load input element (3). 15. Structural element (1) according to one of the preceding paragraphs, characterized in that the section (2) made in the form of a hollow profile is made in the form of a section with a multi-chamber profile. 16. Structural element (1) according to one of the preceding claims, characterized in that, when viewed in cross section, the section (2) made in the form of a hollow profile has to increase bending stiffness and/or torsional stiffness and/or stiffness when at least one outwardly spaced rib (22) at the kink. 17. Structural element (1) according to one of the preceding paragraphs, characterized in that, when viewed in cross section, the section (2) made in the form of a hollow profile has thin thickenings (28) protruding from its outer and/or inner peripheral surfaces, with the help of which the end section (6) of the load input element (3) and the end section (7) of the section (2) made in the form of a hollow profile are kept at a minimum distance from each other. 18. Structural element (1) according to one of the preceding claims, characterized in that within the connecting section (4) at least one intermediate space between two teeth (10) is filled exclusively with adhesive (11).

Images