Vehicle driver and method for its manufacture

Abstract

The invention relates to a vehicle handlebar (1), in particular a bicycle handlebar, comprising a handlebar bracket (20) which consists at least predominantly of a preferably thermoplastic material, having an upper side (21) and a lower side (22), wherein the handlebar bracket (20) comprises at least one central section (23) which is designed for clamping in a stem clamp of the two-wheeler, at least two handlebar arm sections (24) which are connected to the central section (23), and at least two grip sections (25) which are integrally connected to the handlebar arm sections (24), wherein the handlebar bracket (20) is designed as a one-piece, injection-molded plastic component and wherein at least one of the sections of the handlebar bracket has at least one mass recess (30) in at least one region extending over at least a partial circumference and a partial length of the handlebar bracket (20), which recess forms a partially perforated lateral surface of the vehicle handlebar (1).and / or the handlebar (20) has a fiber reinforcement with tensile-resistant continuous fibers (50) at least over a partial length and / or over a partial circumference. The invention further relates to a method for producing the vehicle handlebar (1).

Description

The invention relates to a vehicle handlebar, in particular a bicycle handlebar, having a handlebar clamp which is made at least predominantly of a preferably thermoplastic material.A bicycle handlebar made of a fiber-reinforced plastic is known, for example, from EP 4 173 938 A1. This publication describes a bicycle handlebar having a handlebar core having a center portion for connection to a control head and laterally oriented handlebar arms formed at opposite ends of the center portion. In order to achieve better damping behavior of the link against vibrations and shocks, it is proposed in the teaching described in EP 4 173 938 A1 that the central section and the link arm sections are produced as a one-piece molded part from a fiber-reinforced plastic which has a fiber volume fraction of at least 50%. The handlebar of the known bicycle handlebar comprises a central portion and handlebar arm portion, which are formed as a whole as a one-piece molded part. The link arms are each provided at their outer ends with a receiving opening for receiving an extension rod defining a handle portion. To accommodate the extension rods, the link arm sections each form a partially enclosed cavity in sections. The known bicycle handlebar of multi-part design overall has the disadvantage that the production of the individual parts is relatively complicated, in particular since the handlebar arms each have a partially or completely enclosed cavity in sections with wall thicknesses of the outer walls of different thicknesses over the profile cross section.From EP 2 829 465 B1 a bicycle handlebar is known which comprises a central portion for fastening the handlebar and two end portions forming the handles, each of which is located on one side of the central portion, wherein the handlebar is made of plastic and comprises at least one stiffening insert located on the upper part of the handlebar. The handlebar according to EP 2 829 465 B1 is made of two half shells intended to form a core of the handlebar, the core and the reinforcing inserts being placed in an injection mold and injection molded. This production process is likewise relatively complicated.Further prior art is known from the publications EP 4 173 937 A1, U.S. Pat. No. 5,269,196 and U.S. Pat. No. 503,773.The object of the invention is to provide a bicycle handlebar made of plastic which can be produced particularly easily and which can be produced particularly easily in particular by injection molding.The invention is further based on the object of providing such a vehicle driver which both has good suspension and damping properties and also permits simple integration of functional components of the bicycle.The object is achieved by the provision of a vehicle driver with the features of claim 1.The object is furthermore achieved by the provision of a method for producing a vehicle driver, in particular having the features of claim 1.One aspect of the invention relates to a vehicle handlebar, in particular a bicycle handlebar, having a handlebar clamp which is at least predominantly made of a thermoplastic material, having an upper side which, in the installed position on the two-wheeler, faces a user, and having an underside which, in the installed position on the two-wheeler, faces away from a user, wherein the handlebar clamp comprises at least one central portion which is designed for clamping attachment in a front clamping of the two-wheeler or which has a clamping receptacle for attachment to a fork shank or a control head of the two-wheeler. The steering handle of the vehicle steering arm according to the invention comprises at least two steering arm sections which are integrally connected to the central section, and at least two grip sections which are integrally connected to the steering arm sections and which preferably have a cylindrical cross section at least in regions. The handlebar clamp according to the invention is formed as a one-piece injection molded plastic component, wherein in particular the central portion, the handlebar arm portions and the grip portions are integrally connected to each other. At least one of the sections of the handlebar clamp has at least one mass recess extending over at least a partial circumference and / or a partial length of the handlebar clamp, which mass recess forms a surface area of the handlebar clamp that is broken or cracked in some areas. The lateral surface of the handlebar clamp in the sense of the present invention is to be understood as substantially the envelope curve of the handlebar clamp. The steering handle according to the invention does not have a full profile cross section in these regions.The mass recesses of at least the central section and the steering arm sections are preferably arranged outside the neutral fiber of the steering handle on the underside of the steering handle, on which the steering handle is predominantly subjected to pressure when bending moments are introduced by the user.According to a further aspect, it is alternatively or additionally provided that the link bow has a fiber reinforcement with tension-resistant continuous fibers at least over a partial length and / or over a partial circumference.A first variant of the vehicle driver according to the invention is filled with short fibers and provided with at least one, preferably with a plurality of mass recesses.An alternative embodiment of the vehicle driver is likewise produced as an injection-molded one-piece driver arm from a thermoplastic material reinforced with short fibers and comprises, instead of mass recesses, at least one fiber reinforcement extending continuously from end to end made of long fibers or unidirectional, tension-resistant endless fibers oriented in the longitudinal direction of the driver arm.A third variant of the vehicle driver according to the invention comprises a combination of the features described above, namely both at least one mass cutout and, in addition to a filling with short fibers, a continuously extending fiber reinforcement made of long fibers aligned in the longitudinal direction of the handlebar yoke and preferably continuously extending from end to end of the handlebar yoke / unidirectional tension-resistant endless fibers.In the following, the terms upper side and lower side and also above or below refer to the handlebar bracket in the installed position on the two-wheeler and to the perspective of a user who is seated on the two-wheeler. The vehicle driver is preferably designed as a driver for a bicycle, wherein it is not excluded that the driver is also provided for mounting on a lightweight motorized two-wheeler. The term bicycle is also to be understood as an electric bicycle.The tension-resistant endless fibers are preferably arranged outside the neutral fiber of the handlebar arm on an upper side of the handlebar arm, so that bending moments introduced onto the handlebar arm from above by the user and resultant tensile forces on the upper side of the handlebar are absorbed by the fiber reinforcement.The basic cross section of the handlebar yoke can be circular at least over partial sections, whereas over other partial sections it can have a different cross-sectional shape, for example oval.The handlebar clamp according to the invention can have, for example, a cross section tapering from the central section to the handlebar ends, for example inversely proportional to the bending moment profile when the handlebar ends are loaded by the user. The steering handle can be designed, for example, as a so-called modified steering handle.The steering handle of the vehicle steering arm according to the invention is preferably made completely and exclusively of thermoplastic material.A particular feature of the vehicle driver according to the invention is that the driver bar, apart from the mass recesses, has a full profile cross section, i.e. substantially does not have enclosed cavities extending in the longitudinal direction of the driver bar, which would require a complicated construction of the injection molding tool with slides and cores during production by the injection molding method. The handlebar clamp according to the invention is optimized with regard to easy manufacturing by injection molding and simple final strength. In particular, it should be possible to produce the handlebar clamp according to the invention in a simple two-part "on-off" injection molding tool.The profile cross section of the handlebar clamp can be round or oval at least in regions. A round profile cross section, in particular in the region of the handlebar clamp, has the advantage that the vehicle handlebar can interact with any desired number of standardized handlebar clamps.The mass recesses serve on the one hand to reduce the weight of the steering handle, and on the other hand, this prevents larger material accumulations and an associated shrinkage distortion of the plastic. Finally, the handlebar arm has greater flexibility in the region of the mass recesses, due to the cross section of the handlebar arm reduced in these regions. The mass recesses are preferably each provided in regions of the handlebar clamp that are not visible or are concealed during use. The mass recesses form in the relevant regions a perforated lateral surface of the handlebar clamp and are formed as depressions in the cross section of the handlebar clamp, which depressions extend radially with respect to the longitudinal axis of the handlebar clamp.Particularly preferably, the mass recesses can be designed as compartments or receiving space for functional components of the two-wheeler, for example for receiving electronic components or for receiving illumination.The steering handle according to the invention can be designed as a so-called flat bar steering handle, riser bar steering handle or drop bar steering handle.In an expedient variant of the vehicle driver according to the invention, the mass cutout can be designed as an open chamber structure which is designed such that it can be released from an injection-molding tool without the use of slides, wherein preferably at least some chambers have at least one subdivision designed as a support rib.The vehicle driver according to the invention can basically have integrally formed functional elements / fastening elements, which is why according to the invention it is conceptually differentiated between the vehicle driver and the driver's arm as such.In particular, in order to ensure easy mouldability of the vehicle driver produced by the injection moulding process from an injection moulding tool, the supporting ribs and / or boundary walls of the chambers of the mass recesses are preferably designed as beveled surfaces. For example, the support ribs can furthermore be designed with a wall thickness that decreases radially from the inside to the outside.In one configuration of the vehicle driver according to the invention, it can be provided that the latter is formed at least predominantly from a filled and / or from a fiber-reinforced thermoplastic material. The plastic can be filled with long fibers and / or with short fibers. The proportion of the fiber filling can be, for example, from 20 to 60 percent by weight, based on the total weight of the plastic composition used.As already mentioned above, according to the further aspect according to the invention, it can alternatively or additionally be provided that the vehicle driver according to the invention comprises a fibre reinforcement with tension-resistant continuous fibres. Preferably, the fiber reinforcement with endless fibers extends over a partial length, particularly preferably over the entire length of the handlebar clamp.Furthermore, it can be provided particularly preferably that the continuous fibers themselves each extend over a partial length, particularly preferably over the entire length of the handlebar clamp, and the continuous fibers and / or the fiber reinforcement have an orientation which corresponds to the longitudinal extension of the handlebar clamp or is oriented parallel thereto. Naturally, the handlebar is loaded non-uniformly with respect to the length of the handlebar when used as intended by a user of the two-wheeler. In the region of the handlebar clamping, the greatest bending moment is introduced into the handlebar clamp, whereas the cross section of the handlebar clamp is less stressed at the ends of the handle. For this reason, it is expedient that the fiber reinforcement with endless fibers does not extend over the entire length of the handlebar clamp, but only over a partial length from approximately the center of the handlebar clamp to the two ends, respectively, with the exception of the grip regions. This has the advantage that the grip regions can be designed more easily with recesses and / or apertures.In this context, the use of unidirectional tapes (UD tapes) has proven to be particularly expedient.In one embodiment of the vehicle driver according to the invention, the driver's arm can have at least one preferably injection-molded or injection-molded continuous fiber-reinforced band with unidirectionally oriented, tension-resistant reinforcing fibers, which are selected from a group of fibers comprising carbon fibers, glass fibers, aramid fibers, Kevlar fibers and basalt fibers. The tension-resistant straps can extend in a straight line over at least a partial length of the handlebar clamp, and / or over a partial circumference of the handlebar clamp, preferably over the entire length of the handlebar clamp from end to end.Alternatively, the use of fiber prepregs made of laid or woven fiber-reinforced composite materials can be provided according to the invention. Prepregs of this type, including prepregs with a matrix of temperature-curable plastics (thermosetting plastics), can be integrated as fabric hoses in partial sections of the profile cross section of the handlebar clamp. These prepregs may have been placed in an injection mould before the steering handle is shaped.According to the invention, the use of prepregs with a matrix of thermoplastic materials is preferred, in particular because the recycleability (re-useability of the plastic material prepared after the life cycle of the vehicle driver) of the vehicle driver is improved and / or ensured as a result.In a variant of the vehicle driver according to the invention, it can be provided that the driver's arm has, at least in sections, an integrated train guide for Bowden trains of the two-wheeler. The pull guide can be provided, for example, in the form of U-shaped or C-shaped channels which are open in the direction of the lateral surface of the handlebar clamp.In one embodiment of the vehicle driver according to the invention, it is provided that the at least one central section has a integrally formed front part with a clamping receptacle for a fork stem or a control head of the two-wheeler. The front part can be formed with at least one feedthrough and / or at least one guide and / or at least one receiving compartment for the integration of Bowden cables and / or for the integration of electronic components such as for example tachometers, battery charge level display, etc.The at least one mass cutout is preferably designed as a receptacle for a functional component, in particular for an electronic component of the two-wheeler, for example an LED illumination.It is expedient and advantageous if at least one mass recess is provided in the downwardly facing regions or on the underside of the handlebar clamp, so that said mass recess is not visible to the user when using the two-wheeler. Such an arrangement is also favorable with regard to the force flow through the steering handle.At least one mass cutout can be provided in each case in the region of an offset or bend of the steering handle, and can be oriented there, for example, in the forward / downward direction.The handlebar clamp expediently has spring-elastic properties in partial sections, wherein the handlebar clamp has first and second partial sections and the first partial sections have greater elasticity than the second partial sections and in particular the first partial sections are arranged in the region of bends and / or bends of the handlebar clamp. The first partial sections are preferably sections of the handlebar yoke in which ground recesses are provided. The higher elasticity of the handlebar yoke in these regions can already result from the fact that the mass cutout forms a defined reduction in the cross-sectional area of the profile cross section.In a variant of the vehicle steering arm according to the invention, it can be provided that the steering arm according to the invention is formed in the region of the mass cut-outs from a thermoplastic material, the properties of which are different from the thermoplastic material which forms the remaining regions of the steering arm. The handlebar according to the invention can be manufactured, for example, by a multi-component injection molding process from different thermoplastic materials, in particular using thermoplastic elastomers.The grip sections preferably have mass recesses which pass through the cross section of the grip sections in such a way that the lateral surface of the grip sections is perforated on diametrically opposite sides. These mass recesses can pass through the grip sections from one side to the other. The grip sections which are located at the link ends are substantially exposed to a lower bending stress, so that a mass reduction of the link cross section can be achieved in a particularly advantageous manner in these regions. The penetrated regions of the grip sections can be covered, for example, with commercially available standard grip elements, so that the handlebar is not haptically impaired thereby.In a variant of the vehicle steering arm according to the invention, it can be provided that at least some of the mass recesses / apertures of the lateral surface of the steering arm are provided with covers which can be inserted in a releasable manner and can preferably be exchanged. These covers can be designed, for example, as elastomer caps.Particularly preferably, the vehicle driver according to the invention comprises one or more functional components which are preferably arranged in at least one receiving space formed by a mass cutout. Functional components within the meaning of the invention are, for example, light, tachometers, actuating elements / switches, a so-called head unit, GPS module, GPS tracker, V2X module (vehicle-to-everything communication module) bell etc.The invention further relates to a method for producing a vehicle driver of the type described above with one or more of the advantageous features described above from thermoplastic material, wherein the method comprises the following method steps:providing an injection molding arrangement having at least one injection unit with means for plasticizing and providing the plasticized plastic under pressure into a tool having at least one cavity, wherein the tool is preferably embodied in two parts and without slides and the at least one cavity defines the shape of the connecting rod and has at least one sprue,injecting the plasticized plastic under pressure into the closed mold; andopening the tool and removing the finished product.The method according to the invention comprises the production of the handlebar clamp in a single injection molding cycle and preferably without the use of preforms as insert parts. A single injection molding cycle in the sense of the present application is understood to mean the injection process into the closed and locked tool and the subsequent removal process of the finished article. The injection can be effected by means of one or more injection units via one or more sprues.In a variant of the method according to the invention, at least one thermoplastic filled with tensile-resistant short fibers and / or long fibers can be used as thermoplastic. The short fibers can be embedded in the plastic matrix in an non-oriented manner and have a length of 0.1 to 1 mm. The long fibers can also be embedded in the plastic matrix in an non-oriented manner and have a length of 1 to 50 mm. The tension-resistant fibers can be selected from a group of tension-resistant fibers comprising glass fibers and carbon fibers. The proportion of the tension-resistant fibers to the total weight of the plastic composition used can be from 20 to 60 percent by weight. A range of values of up to within the meaning of the present invention fundamentally includes the limit values.The thermoplastic material which can be used in the method according to the invention is selected from a group of thermoplastic materials comprising PA, PP, PPA, PS, PE, PE, ABS, PC, POM, PEK, PEEK, PA610, HPPA, PARA, PBT.An advantageous variant of the method according to the invention can provide that different thermoplastics are injected into the tool in a multicomponent injection molding process, wherein preferably at least one of the injected thermoplastics is a thermoplastic elastomer.Alternatively or additionally, it can be provided in the method according to the invention that a further method step comprises inserting at least one endless fiber-reinforced belt with unidirectionally oriented, tension-resistant reinforcing fibers into at least one partial cavity of the tool.The band is preferably introduced into the tool in a positionally fixed manner. UD tapes, woven fabrics, continuous fibers or prepregs can be suctioned in in the tool and / or fixed to the tool wall by means of adhesive tape or fixed via holding mandrels.The belt may comprise unidirectionally oriented continuous fibers selected from a group of fibers comprising carbon fibers, glass fibers, aramid fibers, Kevlar fibers and basalt fibers.The invention will be explained below with reference to and with reference to an exemplary embodiment illustrated in the attached drawings.The following are shown: FIG. 1 is an exploded perspective view of the vehicle driver according to the invention from below and front, FIG. 2 is a top view of the vehicle driver of FIG. 1 , FIG. 3 is another perspective view of the vehicle driver according to the invention corresponding to FIG. 1 ; and FIG. 4 is a three-quarter perspective view of another embodiment of the vehicle driver according to the invention.The vehicle steering arm 1 shown in the figures comprises a steering arm 20 which, in the exemplary embodiment described, is inclined slightly upwards and backwards.The terms top, rear and top and bottom refer to the vehicle driver 1 in the installed position on the two-wheeler and to the perspective of a user who sits on the two-wheeler. The two-wheeler is, for example, a bicycle.The steering handle 20 is formed as a one-piece plastic injection molded component made of a thermoplastic material, preferably of a polyolefin, for example of a polyamide. The handlebar 20 comprises a central portion 23, two handlebar arm portions 24 adjoining the central portion 23 and integrally formed thereon, as well as two grip portions 25 each adjoining the handlebar arm portions 24 and integrally formed with the handlebar arm portions 24. The clamping region 26 is designed to be received by a corresponding clamping receptacle of a separate link front part. The surface of the handlebar 20 in the clamping region 26 can have, for example, a surface roughness which increases the frictional connection of a clamping. The surface roughness of the material can also be produced in this region of the handlebar 20 by a corresponding filling of the thermoplastic material used.The handlebar 20 was produced by means of an injection molding process in a single injection molding cycle, for example in a simple, slideless (on-off) injection molding tool without mold cores and undercuts.FIGS. 1 to 3 show a first variant of the vehicle driver 1 according to the invention, which was produced from a thermoplastic filled with tension-resistant short fibers. The short fibers can be selected, for example, from a group of fibers comprising glass fibers, Kevlar fibers, aramid fibers, basalt fibers, carbon fibers.As is readily apparent from the figures, the handlebar 20 of the vehicle handlebar 1 is provided with mass recesses 30 in the central portion 23, in the handlebar arm portions 24 and in the grip portions 25 such that the lateral surface of the handlebar 20 is broken or cracked. The mass recesses 30 are provided, for example, in the clamping region 26 of the central section 23 on the underside 22 of the handlebar 20 and there, in the installed position in a clamping receptacle, the two-wheeler is concealed, for example, by a front end clamp. Furthermore, in the variant of the handlebar 20 shown, the handlebar arm sections 24 are designed as transition regions which are slightly curved upwards and backwards between the central section 23 and the grip sections 25.Provided on the underside 22 of the handlebar 20 are respective mass recesses 30, which each form a receiving space or a chamber 31 which is open in the direction of the underside 22 of the handlebar 20 and comprises boundary walls 33 and support ribs 32 extending diagonally between them. The boundary walls 33 and the supporting ribs 32 are inclined from the inside to the outside, so that the chamber 31 forms a receiving space which increases conically outwards, as a result of which the mouldability from an injection mould is facilitated. The support ribs 32 can furthermore also have a thickness that decreases from the inside to the outside.In the region of the grip sections 25, which are preferably formed with a uniform round cross section, the mass cut-outs 30 are formed in such a way that they completely pass through the grip sections 25, that is to say in each case form apertures through the lateral surface / envelope curve of the handlebar 20 on diametrically opposite sides with respect to a longitudinal axis.As can be seen from the exploded view in FIG. 1, the mass recesses 30 in the link arm sections 24 are provided with releasable covers 40, which can be designed, for example, as caps made of a thermoplastic elastomer.In principle, the compartments formed by the mass cutout 30 can serve to accommodate functional components of the two-wheeler, for example, lighting, operating elements, etc.A variant of the handlebar 20 according to the invention is shown in FIG. 4. The steering handle 20 shown in FIG. 4 has likewise been produced in one piece or in one piece from a thermoplastic material by an injection molding process. The thermoplastic material of the handlebar 20 according to the embodiment of FIG. 4 can also be filled with tension-resistant short fibers. In the exemplary embodiment according to FIG. 4, glass fibers, aramid fibers, carbon fibers, Kevlar fibers, basalt fibers or the like are likewise suitable as short fibers.In the second exemplary embodiment of the vehicle driver 1, a further fiber reinforcement in the form of unidirectional continuous fibers 50 is provided, which were inserted into the injection mold as a so-called "UD tape" before the injection process, for example, and were injection-molded and / or partially encapsulated by injection molding. The continuous fibers 50, for example as carbon fibers or the like, extend continuously from one link end to the other link end and on the upper side 21 of the handlebar 20 outside the neutral fiber, so that they counteract a tensile load on the handlebar 20 due to the introduction of a bending moment when the handlebar ends / grip sections 25 are loaded by the user.According to the invention, the first variant of the handlebar 20 according to FIGS. 1 to 3 can also be additionally reinforced with unidirectional long fibers / endless fibers continuously aligned in the longitudinal direction of the handlebar 20.List of reference characters1 Vehicle driver 20 Driver's handle 21 Upper side 22 Lower side 23 Central section 24 Driver arm sections 25 Grip sections 26 Clamping region 30 Mass cutout 31 Chambers 32 Supporting ribs 33 Boundary walls 27 Bend 40 Covers 50 Unidirectional tension-resistant endless fibersReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedEP 4 173 938 A1

[0002] EP 2 829 465 B1

[0003] EP 4 173 937 A1

[0004] U.S. Pat. No. 5,269,196

[0004] US 503,773

[0004]

Claims

Vehicle steering arm (1), in particular bicycle steering arm, having a steering arm (20) which is at least predominantly made of a preferably thermoplastic material, having an upper side (21) which, in the installed position on the two-wheeler, faces a user, having an underside (22) which, in the installed position on the two-wheeler, faces away from a user, wherein the steering arm (20) comprises: - at least one central portion (23) which is designed for clamping attachment in a front clamping of the two-wheeler or which has a clamping receptacle for attachment to a fork shank or to a control head of the two-wheeler, - at least two steering arm portions (24) which are connected to the central portion (23), and - at least two grip portions (25) which are connected to the steering arm portions (24) and preferably have a cylindrical cross section at least in regions, wherein - the steering arm (20) is in the form of a one-piece, The invention is embodied as an injection-molded plastic component and in particular the central portion (23), the steering arm portions (24) and the grip portions (25) are integrally connected to one another, and wherein - at least one of the portions comprising the central portion (23), the steering arm portions (24) and the grip portions (25) has at least one mass recess (30) in at least one region extending over at least a part of the circumference and a part of the length of the steering handle (20), said mass recess forming a regionally perforated lateral surface of the vehicle steering handle (1) and / or the steering handle (20) has a fiber reinforcement with tension-resistant continuous fibers (50) at least over a part of the length and / or over a part of the circumference.Vehicle driver (1) according to Claim 1, characterized in that the mass cutout (30) is designed as an open chamber structure which is designed such that it can be released from an injection moulding tool without the use of slides, wherein preferably at least some chambers (31) have at least one subdivision designed as a supporting rib (32).Vehicle control arm (1) according to Claim 2, characterized in that the supporting ribs (32) and / or boundary walls (33) of the chambers (31) are designed as beveled surfaces with respect to a radial extending in a profile cross section.Vehicle steering arm (1) according to one of Claims 1 to 3, characterized in that it is formed at least predominantly from a filled and / or from a fibre-reinforced thermoplastic material, preferably with a filling degree of 20 to 60 percent by weight, based on the total weight of the steering arm (20), with a fibre length of 0.1 to 50 mm, preferably with a fibre length of 0.1 to 1 mm.Vehicle steering arm (1) according to one of Claims 1 to 4, characterized in that the fibre reinforcement with endless fibres (50) extends over a part length, preferably over the entire length of the steering arm (20), in that preferably the endless fibres (50) each extend over the entire length of the steering arm (50) and the endless fibres (50) have an orientation which corresponds to the longitudinal extent of the steering arm (20) or is oriented parallel thereto.Vehicle steering arm (1) according to one of Claims 1 to 5, characterized in that the steering arm (20) has at least one preferably injection-moulded or injection-moulded endless fibre-reinforced band with unidirectionally aligned, tension-resistant reinforcing fibres (50) which are selected from a group of fibres comprising carbon fibres, glass fibres, aramid fibres, Kevlar fibres and basalt fibres.Vehicle control arm (1) according to one of Claims 1 to 6, characterized in that the grip sections (25) each have a control arm end which is closed at the end face.Vehicle driver (1) according to one of Claims 1 to 7, characterized byat least one integrated train guide.Vehicle driver (1) according to one of Claims 1 to 8da characterized in that the central section (23) has at least one clamping region (26) for fastening in a bicycle front part having a preferably round cross section with a standardized diameter (31.8 mm, 25.4 mm).Vehicle control arm (1) according to one of Claims 1 to 9, characterized in that the central section (23) has a front part which is integrally formed on with a clamping receptacle for a fork stem or a control head of the two-wheeler.Vehicle steering arm (1) according to one of Claims 1 to 10, characterized in that at least one mass cutout (30) is designed as a receptacle for a functional component, in particular for an electronic component of the two-wheeler.Vehicle steering arm (1) according to one of Claims 1 to 11, characterized in that at least one mass cutout (30) is provided in the downwardly pointing regions or on the underside (21) of the steering armVehicle steering arm (1) according to one of Claims 1 to 12, characterized in that at least one mass cutout (30) is provided in each case in the region of an offset or bend (27) of the steering arm (20).Vehicle steering arm (1) according to one of Claims 1 to 13, characterized in that the steering arm (20) has spring-elastic properties at least in partial sections, wherein the steering arm (20) has first and second partial sections and the first partial sections have greater elasticity than the second partial sections and in particular the first partial sections are arranged in the region of bends and / or bends (27) in the steering arm (20).Vehicle driver (1) according to one of Claims 1 to 14, characterized in that said driver has spring-elastic sections in the region of the mass cutout (30).Vehicle driver (1) according to one of Claims 1 to 15, characterized in that the grip sections (25) have mass cut-outs (30) which pass through the cross section of the grip sections (25), with the result that the lateral surface of the grip sections (25) is broken through on diametrically opposite sides.Vehicle steering arm (1) according to one of Claims 1 to 16, characterized in that at least some of the mass cut-outs (30) or apertures of the lateral surface of the steering arm (20) are provided with at least one cover (40) which can be inserted in a releasable manner and can preferably be exchanged.Vehicle driver (1) according to one of Claims 1 to 17, characterized in that the covers (40) are at least partially formed from a thermoplastic elastomer.Vehicle driver (1) according to one of Claims 1 to 18, comprising one or more functional components which are preferably arranged in at least one receiving space formed by a mass cutout (30).Method for producing a vehicle steering arm (1) made of thermoplastic material having the features of one of the preceding claims 1 to 19, wherein the method comprises the following method steps: - providing an injection-moulding arrangement having at least one injection unit with means for plasticizing and providing a plasticized plastic material under pressure into a tool having at least one cavity, wherein the tool is preferably designed in two parts and without a slide and the at least one cavity defines the shape of the steering arm (20) and has at least one sprue, - injecting the plasticized plastic material under pressure into the closed tool and - opening the tool and removing the finished product.Method according to claim 20, characterised in that at least one thermoplastic filled with tensile-resistant short fibres and / or long fibres is used as the thermoplastic.Method according to either of Claims 20 and 21, characterized in that the thermoplastic is selected from a group of plastics comprising PA, PP, PPA, PS, PE, PE, ABS, PC, POM, PEK, PEEK, PA610, HPPA, PARA, PBT, PK.Method according to one of Claims 20 to 22, characterized in that different thermoplastics are injected into the tool in a multicomponent injection moulding process, wherein preferably at least one of the injected thermoplastics is a thermoplastic elastomer.Method according to one of Claims 20 to 23, characterized bythe method step of inserting at least one endless fibre-reinforced band having unidirectionally oriented, tension-resistant endless fibres into at least one part-cavity of the tool.Method according to claim 24, characterised in that the band is introduced into the tool in a positionally fixed manner.Method according to either of Claims 24 and 25, characterized in that the band comprises unidirectionally oriented continuous fibres selected from a group of fibres comprising carbon fibres, glass fibres, aramid fibres, Kevlar fibres and basalt fibres.

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