EP4025437A1 - Roue de roulement pour vélo - Google Patents

Roue de roulement pour vélo

Info

Publication number
EP4025437A1
EP4025437A1 EP20771783.6A EP20771783A EP4025437A1 EP 4025437 A1 EP4025437 A1 EP 4025437A1 EP 20771783 A EP20771783 A EP 20771783A EP 4025437 A1 EP4025437 A1 EP 4025437A1
Authority
EP
European Patent Office
Prior art keywords
rim
spoke
spokes
flank
impeller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20771783.6A
Other languages
German (de)
English (en)
Inventor
Günther Wilhelm BORUTTA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Borutta Guenther Wilhelm
Original Assignee
Borutta Guenther Wilhelm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Borutta Guenther Wilhelm filed Critical Borutta Guenther Wilhelm
Publication of EP4025437A1 publication Critical patent/EP4025437A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B5/00—Wheels, spokes, disc bodies, rims, hubs, wholly or predominantly made of non-metallic material
    • B60B5/02—Wheels, spokes, disc bodies, rims, hubs, wholly or predominantly made of non-metallic material made of synthetic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/003—Spoked wheels; Spokes thereof specially adapted for bicycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/02—Wheels with wire or other tension spokes
    • B60B1/04—Attaching spokes to rim or hub
    • B60B1/041—Attaching spokes to rim or hub of bicycle wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/06—Rims characterised by means for attaching spokes, i.e. spoke seats
    • B60B21/062—Rims characterised by means for attaching spokes, i.e. spoke seats for bicycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/06—Rims characterised by means for attaching spokes, i.e. spoke seats
    • B60B21/066—Rims characterised by means for attaching spokes, i.e. spoke seats the spoke mounting means being located on a flange oriented radially and formed on the radially inner side of the rim well
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/02—Wheels with wire or other tension spokes
    • B60B1/04—Attaching spokes to rim or hub
    • B60B1/042—Attaching spokes to hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2360/00—Materials; Physical forms thereof
    • B60B2360/30—Synthetic materials
    • B60B2360/34—Reinforced plastics
    • B60B2360/341—Reinforced plastics with fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2360/00—Materials; Physical forms thereof
    • B60B2360/30—Synthetic materials
    • B60B2360/36—Composite materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0047—Hubs characterised by functional integration of other elements
    • B60B27/0052—Hubs characterised by functional integration of other elements the element being a brake disc

Definitions

  • the invention relates to a wheel based on fiber composite materials for a bicycle, with a hub, a number of spokes and a rim made from fiber composite materials and a manufacturing method for such a wheel.
  • Impellers or wheel sets consist i. d. Usually from a front and a rear wheel. Basically, an impeller is constructed point-symmetrically or radially symmetrically and comprises at least the following components: A hub is located radially on the inside, which is ring-shaped surrounded by a rim, with a variable number of spokes stretched between the hub and the rim as a tension-loaded connection. A hub denotes a sleeve-shaped center piece of a wheel close to the axis, through which an axis runs around which the impeller rotates. Impellers come in different shapes, in different qualities, with varying weights and in different materials, such as: B. aluminum or fiber composite, d. H. Carbon i. S.
  • a wheel with a rim and a hub and a device, namely a spoke, for connecting the rim to the hub is known, the spoke traversing a connection reinforcement of the rim and thereby on a rim core or a rim wall is glued on.
  • the spoke must at least be threaded through the connection reinforcement or pierce it.
  • EP 2 821 331 A1 a manufacturing method for running wheels made of fiber composite materials is known, in which both the rims and the spokes are made of fiber composite materials. In it, the spokes are laboriously threaded into the rim by means of holes made in the rim and there glued or glued on the inside of the rim or a rim flank of the rim with adhesives.
  • a first impeller according to the invention comprises a hub or wheel hub in the center of the impeller.
  • the hub is rotatable about an axis via which it is connected to at least two bearings.
  • the orientation of the axis of the hub is described as an axial direction of the impeller, the direction of rotation around the axial direction is defined as the impeller direction or azimuthal direction (azimuthal direction).
  • the respective direction of the impeller radially outwards or inwards is referred to below as the radial direction, as is usual for rotationally symmetrical bodies.
  • the respective components are always described with regard to their intended condition in the impeller and the resulting directions.
  • the impeller further comprises a number of spokes.
  • Spokes are strut-like connecting parts which are arranged between the aforementioned hub, to which they can be conventionally attached, and a rim of the wheel, which will be explained below. They are positioned all around in the impeller in such a way that they radiate out from the hub essentially radially outwards and evenly support the rim of the wheel, which extends circularly azimuthally around the hub.
  • the spokes which are evenly distributed all around, distribute the forces acting on the wheel in an advantageous manner in the wheel.
  • the impeller includes a rim made of fiber composite materials.
  • Fiber composite materials or materials consist in principle of two main components, namely of reinforcing fibers and an embedding matrix or a composite, i.e. the filler or adhesive between the fibers.
  • glass, carbon or (carbon) carbon, ceramic, aramid, boron, basalt or natural fibers are used as fibers.
  • the matrix is essentially divided into two groups, namely fiber-plastic composites and others.
  • fiber-plastic composites a distinction is made between polymers such as thermosets, elastomers or thermoplastics, and biopolymers, i.e. H. biodegradable composite materials based on renewable raw materials.
  • the group of others are e.g. B. cement and concrete, metals, ceramics or carbon fiber reinforced carbon (CFC). With such fiber composite materials, for example, compared to aluminum or the like, significant weight savings can be made.
  • the rim according to the invention has two rim flanks as legs and a rim base as a stabilizing cross connection between the legs. In the finished state, this results in an almost closed rim enclosing an interior cavity.
  • the rim flanks of the rim can also be described as two lateral boundary surfaces of the rim, which span an annular surface in the radial and azimuthal direction, which on top of that extends bent in a third direction, namely the axial direction, that a curved outer shell, more precisely a "Hyperbolic paraboloid shell" is created.
  • the rim flanks come together in abutment along mutually facing radially inner edges of the boundary surfaces, specifically in a central plane to which the axis of the wheel is perpendicular.
  • the converging edges or abutting edges usually form the radially innermost part of the rim.
  • the rim flanks arched between the longitudinal edges run symmetrically apart along a, for example, essentially parabolic, V-shaped or U-shaped curvature, ie proportionally in the radial and axial directions outward to a radially outermost part of the rim.
  • the outermost part is the rim base.
  • the rim receives the air-filled tire, which can be pulled onto the rim for this purpose.
  • the rim comprises a number of recesses in the rim flanks for - in the assembled state - the radial passage of the spokes through the rim.
  • Recesses generally denote those recesses or openings that are located on the edge or on the edges of a component, that is to say are open at least on one side or are not enclosed on all sides by the component.
  • the recesses according to the invention are implemented in the rim flanks, for example, in such a way that they begin at those edges of the rim flanks which form the later butted butted edges of the rim flanks in the finished state of the wheel or after assembly.
  • the recesses can therefore also be referred to as slot-shaped incisions or access points starting from the respective abutting edge.
  • the spokes can therefore, according to the invention, be inserted or spoked into the recesses of a rim flank from an axial direction of the impeller.
  • the struck state i. H.
  • the abutting edges of the rim flanks then mutually seal the respective recesses so that the spokes are enclosed in openings in the rim flanks that are closed all around.
  • the spokes are thereby held in position in the rim, as is known from practice.
  • the construction according to the invention therefore enables the spokes to be inserted into the rims in principle from an axial instead of a radial direction, thus allowing the components of the impeller to be manufactured in the manner of a layered layering in the axial direction.
  • the invention enables a predominantly machine, in particular almost fully automatic production of the impeller in a layer structure.
  • a second wheel according to the invention for a bicycle comprises - like the above first impeller according to the invention - a hub, a number of spokes and a rim made of fiber composite materials.
  • the rim also has two rim flanks and a rim well.
  • the second wheel comprises a spoke rib.
  • It is characterized by outer, usually convex contact surfaces, the profile of which, usually a curvature, is adapted to an inner profile of the rim.
  • the outer dimensions of the spoke rib thus correspond to a short rim section, namely viewed in cross section through the rim, but not necessarily with the rim base.
  • the spoke rib as a rim section is reduced in size or fitted relative to the rim in such a way that it fits inside the rim between the rim flanks and the rim base.
  • At least one spoke can be attached to the spoke rib without penetration.
  • the spoke rib is used for a penetration-free, for example flat fastening of a radially outer spoke end in the rim.
  • the spoke can be fastened directly to the spoke rib and only glued together with the spoke rib and thus indirectly drawn against the rim.
  • the spoke rib represents, as it were, an anchor section of the rim-side end of a spoke, in that it offers the possibility of fastening the spoke in or on it without penetration, for example by gluing, welding or the like.
  • Spoke ribs can therefore be used to securely fasten spoke ends of almost any shape in the rim. Since the flat fastening by means of a spoke rib does not take place exclusively or directly on the rim flank as a potential stress point of the rim flank, the spoke end fastened in the spoke rib can have almost any shape as well as any material suitable for spokes, without any disadvantages in terms of adhesion or Durability of the attachment of the spoke in the rim arise. In addition to fiber-reinforced plastic, the spoke can therefore conventionally consist of metal, for example.
  • the arches of the spoke rib which are adapted to the inner profile of the rim, are structurally and functionally decoupled from the non-penetrating spoke and the shape of the spoke end. Regardless of this, the bulges offer a generous contact area, which prevents a spoke from being torn out of the rim.
  • the contact area of the spoke rib to the rim is significantly larger in relation to a glue spot of a thin spoke in a hole in the rim flank or in a core of the rim according to the prior art. Tests with the types of fastening according to the prior art have shown that they can withstand significantly less tensile force on the spoke or tension force on the spoke.
  • the second impeller according to the invention is basically independent of the first impeller according to the invention. Since the material of the rim flanks can still be flexible at this point in time of manufacture, it can be placed around or on the spokes in the area of the abutting edges of the first and second rim flanks in the center of the rim or slightly molded in order to embed the spokes as tightly as possible. For this purpose, spokes with a flat, at least in the region of the rim, z. B. elliptical spoke cross-section can be used.
  • a spoke in a first manufacturing step, can be fastened or attached to the spoke rib without penetration, and in a subsequent manufacturing step the spoke rib unit with at least one spoke can be inserted from an axial direction into a recess in a rim flank of the rim and connected to the rim. Both the fastening of the spoke to the spoke rib and the precisely positioned insertion of the unit of spoke rib and spoke into the rim can be automated.
  • a particular advantage of the combination of the constructions of the first and second impellers according to the invention is that the recess in the rim flank for the spoke can be closed again directly when the spoke rib is inserted into the rim flank.
  • the spoke rib provides a stable substructure or additional layer within the Rim for a local reinforcement of the rim in the area of the recess, so that there a weakening of the rim that may have arisen as a result of the recess is more than compensated for.
  • a cut can easily be made in the rim flank, which locally interrupts the fiber flow of the fiber composite material without resulting in disadvantages for the rim in terms of durability or stability or strength.
  • a method according to the invention for producing the above wheel which consists at least partially of fiber composite materials, with an at least three-part rim with a first and a second rim flank and a rim well, a number of spokes and a hub, comprises at least the following steps:
  • an essentially arbitrary number of spokes is connected to a first rim flank.
  • Each spoke is linked or connected to a radially outer spoke end on a later inner side of the rim flank, preferably at least in the vicinity of a joint edge, in a fixed and permanent manner.
  • the first rim flank can lie in a horizontal working plane with its inside facing up.
  • the spokes can then be placed in the desired position from above on the first rim flank. Since the rim flank can be identical on the front and back at this point in time, any flat side of the rim flank can in principle be selected as the inside here. Gluing or welding, for example, can be selected for the connection in order to hold the spokes and the rim flank in position relative to one another.
  • the second rim flank can be connected with spokes in parallel or afterwards.
  • the rim well is inserted into the first rim flank or also placed onto the first rim flank from above.
  • the inside of the rim flank previously selected for fastening the spokes consequently serves as the insert surface of the rim bed.
  • at least one outer leg surface of the rim bed facing the first rim flank can be wetted with adhesive as an adhesive surface and / or an edge area of the first rim flank assigned to the leg surface on the mutually facing contact surfaces.
  • the second rim flank is placed on the first rim flank and on the rim bed, so that the spokes and the rim bed are then at the correspondingly provided positions between the Rim flanks are located.
  • the material of the rim flanks can still be flexible and can be placed around or on the spokes in the area of the abutting edges of the first and second rim flanks in the center of the rim, or lightly molded in order to embed the spokes as tightly as possible.
  • spokes with at least in the region of the rim flat, z. B. elliptical spoke cross-section can be used.
  • the positions of the spokes can be determined almost as desired by means of the positions of cutouts on the abutting edges of the rim flanks by inserting the spokes into the cutouts.
  • Steps A) to C) allow the impeller to be manufactured from a horizontal working plane in a layered structure.
  • a first layer is the first rim flank, in which the spokes and the rim well are inserted as a second layer.
  • a third layer is the second rim flank, which can be connected with spokes beforehand and in the same way as the first rim flank.
  • a number of recesses preferably in the form of slot-shaped incisions, according to the number of spokes, can be made in the rim flanks, particularly preferably cut and / or milled, in order to allow the eccentric insertion of a spoke, in particular outside the center of the rim to allow in the recesses of the rim flank.
  • the inventive construction of the impeller can save weight compared to conventionally produced impellers and still achieve an advantageously stable construction. It is particularly advantageous that the stiffness of the impeller can thus also be adapted during manufacture, in that the spokes can be arranged off-center with respect to the center of the rim.
  • the construction according to the invention also only opens up the previously described manufacturing method for the impeller, which can be carried out in a particularly simple and cost-effective manner by machine and almost fully automatically.
  • Either all the recesses can be spaced from one another by means of any size recess-free sections of the rim.
  • the spacing can be chosen to be uniform, uneven, or at least in pairs, depending on the number of spokes, depending on the desired lacing pattern.
  • At least two recesses can be arranged adjacent to one another in pairs, that is to say for example in the immediate vicinity of one another.
  • Immediate proximity means that the distance between the adjacent pairs in the azimuthal direction is reduced, in particular by more than half the distance to the next cutout of the closest cutout pair.
  • Adjacent cutouts can particularly preferably adjoin one another at least in pairs.
  • two recesses that are assigned to one another or that are adjacent to one another can directly and directly adjoin one another or lie next to one another, so that the recesses merge into one another when the abutting edges of the rim flanks are joined.
  • Such adjoining recesses can be, for. B. at at least one point of contact, namely at one of their corners or at least in sections on at least one edge, so that they overlap in the azimuthal direction in the center of the rim. This is particularly useful when using a spoke rib according to the invention, as will be explained further below.
  • the cutouts can only be made on or in an abutting edge in a rim flank.
  • the cutouts can be formed in different or the same number on both abutting edges of the rim flanks.
  • the recesses can be implemented alternately in the abutting edges of both rim flanks, i.e. H. Recesses that are adjacent to one another or that follow one another in the azimuthal direction of the rim are initially located in one and then in the other rim flank.
  • the recesses extend from the center of the rim in the direction of the rim well at least to such an extent that they allow the spokes to be essentially axially inserted or spoked orthogonally to their longitudinal direction from a side in the center of the rim to the opposite side of the recess, i.e. H. essentially in the axial direction of the impeller. In the spoked state, the spokes thus run radially through the rim.
  • the recesses z. B rectangular, strip-shaped, round or oval and extend in addition to the transverse direction or axial direction along the rim in the circumferential direction of the impeller or azimuthal direction.
  • An extension of a Recess in the transverse direction of the rim is referred to as the "length of the recess” (or also depth).
  • a dimension of the recess extending perpendicular to this in the azimuthal direction of the rim is defined as the “width of the recess”. This is because the recesses can primarily be designed larger or longer in the transverse direction of the rim than they are wide in the circumferential direction, as will be described below for asymmetrical lacing.
  • two recesses together can jointly enable the insertion of a spoke, in that the recesses are formed exactly opposite one another in each case in both rim flanks and with respect to the rim center.
  • the recesses can be formed in equal parts, that is to say 50% each in both rim flanks, in order to jointly form the cutout required for inserting a spoke. Alternatively, they can be arranged asymmetrically with respect to the center of the rim, so one of the recesses can account for, for example, 60%, 75% or 90% of the necessary axial dimension of the spoke, with the other recess accounting for the remaining 40%, 25% in length. or 10% of the total recess. Recesses in the rim, the length of which, viewed individually, is smaller or, viewed together, equal to the associated or assigned axial dimension of the spoke, allow the spokes to be arranged centrally or almost centrally in the rim, viewed in the axial direction.
  • dimensioning of the recess in the axial direction can comprise a multiple of an axial thickness or an axial diameter of a cross section of the spoke. This is useful in order to be able to position the spokes further outward than conventionally seen in the axial direction. Such positioning of the spokes away from the center of the rim increases the rigidity of the rim. With the same rigidity, a rim can consequently be dimensioned weaker, which means that its weight can be reduced.
  • the remaining part of the recess which is not filled by the spoke in the properly arranged state of the spoke, can advantageously be closed or filled with a filler, for example adhesive.
  • the filler also fixes the spoke in place. It also prevents moisture from penetrating.
  • the recesses for. B. in a decentralized, d. H. eccentric spoke, viewed from the center of the rim in the direction of the rim bed, extend over at least 30%, 40%, 50%, or at least 75% of an axial flank length of the rim flank of the rim.
  • This has the advantage that the spokes are offset axially outwards from the center of the rim, i. H. eccentrically, so that the spokes can be oriented or arranged at a steeper angle to the center of the rim or to a plane of rotation or extension of the wheel, at least if they are arranged diagonally through a plane of extension of the wheel on the opposite side of the hub . Because the larger the angle, the more rigidity the impeller has, the more stable it is.
  • the cutouts on the abutting edges of the rim flanks can each be dimensioned to be the same size and shape. This is particularly useful in the case of symmetrical lacing, i.e. H. In the case of a lacing, in which the "right" and “left” spokes of the wheel are arranged in the rim when looking in the direction of movement of the wheel with an identical distance to the center of the rim and at the same angle to the plane of extension of the wheel.
  • the cutouts can be designed to be of different sizes with respect to each other in the case of two azimuthally successive spokes.
  • a spoke that is asymmetrical with respect to the center of the rim can be implemented.
  • It is particularly suitable for the arrangement of a pinion set or ring gear on rear wheels.
  • the recesses can be of different sizes or lengths, viewed in the axial direction.
  • the recesses can also be shaped differently because they are not assigned to exactly one or more spokes.
  • one of the recesses of two azimuthally successive and immediately adjacent spokes can receive a first spoke completely and the second spoke in addition partially, while the other recess only receives the remaining part of the second spoke.
  • the arrangement of the recesses on the abutting edges of the rim flanks can therefore serve almost any spoke pattern for the spokes.
  • the number of recesses can, but does not necessarily have to, correspond to the desired number of spokes.
  • the lacing pattern determines the azimuthal positioning of the recesses, whereas the azimuthal extension or width of the recesses along the abutting edges is regularly defined by a maximum azimuthal dimension of the spokes.
  • the azimuthal width results from a spoke arranged as intended.
  • an axial length or depth of the recesses is determined by a distance between the spokes and the center of the rim, i. H. by a central or eccentric arrangement or the degree of the eccentric arrangement of the spokes in the rim flanks.
  • Each outer convex contact surface of the spoke rib is designed to bear against an inner, regularly concave flank surface of the rim flank.
  • a recess can be formed in at least one contact surface. It is used to attach the radially outer spoke end of a spoke, for example by gluing or welding.
  • the convex contact surface of the spoke rib is designed and dimensioned in such a way that, when the spoke rib equipped with a spoke is inserted, it clings flat to a concave flank surface of the rim flank.
  • the spoke then runs, viewed radially outward, through the recess in the rim into the interior of the rim, in which it possibly rests or rests on the end face of the spoke rib without crossing the spoke rib. So it's a blind one Countersunk or submerged fastening of the spokes inside or inside the convexly curved contact surface of the spoke rib, without the spokes having to be fastened directly to the rim flank or to a core in the rim.
  • a fitting nose protruding above or beyond the curved or arched plane of the contact surface can be formed on the spoke rib.
  • the fitting nose can protrude flat, for example in a ramp shape, over the curved plane of the remaining spoke rib. It is dimensioned in such a way that, in the assembled state, it engages in a section of the recess that is not filled by the spoke. Since it also fits exactly into the recess in the azimuthal direction, it can also serve as a positioning aid for the spoke rib in the rim flank. It can thus facilitate the precisely positioned assembly of the spoke rib and thus the spoke attached to it in the rim flank, which favors machine production.
  • the fitting nose can preferably fill the unfilled section of the recess completely and terminate flush with a convex outer surface of the rim. When viewed from the outside, the rim can then also form an undisturbed surface in the area of the recess.
  • the spoke rib can preferably be equipped with a support surface for the rim well on a rear side of the recess facing away from the contact surface.
  • the support surface of the spoke rib serves as a positioning aid or radial stop for the rim bed, which specifies the exact positioning of the rim bed, so that there is no longer any need for costly control or checking of the position. Since the spoke rib also serves as a positioning aid for the second rim flank when it is placed, it can slide into its intended position almost by itself.
  • the rim base can preferably describe an arc curved convexly towards the cavity, ie it can form a trough.
  • the rim well can represent a curved "M" open towards the hub, in which a tubular tire of the wheel can be arranged.
  • the shape of the rim base can be designed deeper in the shape of a channel, ie more like a “U”.
  • a spoke can have an integrally formed spoke head for fastening the spoke in the rim.
  • the spoke can comprise a spoke rib formed thereon for contact with an inner concave flank surface of the rim flank.
  • a spoke made of fiber composite materials can be formed with an integrally formed, in particular embedded, metallic thread on the radially inner spoke end for fastening the spoke to the hub.
  • the spokes can be tensioned particularly simply and more firmly than with a direct attachment to the rim flank or to a core according to their task or purpose for stabilizing between the rim and the hub as a tensile stress connection under high tensile stress.
  • the spokes can be round, oval, flat or wave-shaped in cross section, for example. Preferably they can be designed aerodynamically, i. H. offer as little air resistance as possible due to their shape and / or arrangement.
  • At least one transverse edge of the recess which runs largely parallel to the abovementioned abutting edge of the recess, can be adapted to a cross-sectional shape of a spoke used, that is to say e.g. B. semicircular or semi-oval.
  • a spoke used that is to say e.g. B. semicircular or semi-oval.
  • the spoke located in the recess can lie tightly against the transverse edge on its side facing the transverse edge.
  • the recess on the one hand and the spoke rib on the other hand can be adapted to the cross-sectional shape and dimensions of the spoke in such a way that it is integrated into the rim with as few gaps as possible and with little joint formation.
  • spokes can be incorporated into the impeller according to the invention, for example spokes with a reinforced curved part and a diameter that remains the same over the remaining length, so-called thickening spokes (ED), or those whose central part of the spoke is thinner and both ends of which have the same diameter have, so-called double-thick spokes (DD), or the so-called 3D spokes, which apart from the head have three different diameters, or knife, saber, or aero spokes. Only the shape and / or size of the recess in the spoke rib and, if necessary, that of the recess need to be adapted. Also spokes of very different materials, i.e. those made of stainless steel, steel, aluminum, Titanium or carbon fiber can be integrated into the wheel according to the invention as an anchor section on the rim side thanks to the spoke rib.
  • the impeller in order to reduce the weight, can comprise a hub made of fiber composite materials with a number of openings for fastening the spokes.
  • at least one fastening ring made of fiber composite materials can be implemented around the bearings of the hub.
  • the bearings can advantageously be firmly embedded in fiber composite material or fiber composite materials, so that a first inner rotatable bearing part can be rotated about the impeller axis of the hub against an outer bearing part embedded or anchored in the fastening ring.
  • the openings for fastening the spokes in the hub can each be made in at least one radially outer circular ring of the fastening ring.
  • the impeller can be designed or equipped with a metallic disc holder embedded in the hub, preferably with a 6-hole disc holder or center lock disc holder for a disc brake.
  • the impeller according to the invention can thus offer an interface for a conventional disc brake, so that existing brake systems can be used without the need for adaptation.
  • the two rim flanks of the rim can be tightly butted together to form a rim base. According to an alternative embodiment of the invention, they can at least partially overlap or overlap.
  • the recesses for the spokes continue to start centrally within the rim base at the center of the rim and extend from there into the two rim flanks.
  • the rim flanks can enclose or double a separate, inner rim base on the outside.
  • the inner rim base can be a leading edge located within the rim flanks and predominantly in the area of the abutting edges of the rim flanks, which additionally functions as a sealing inner layer.
  • the rim flanks in the manufacturing process according to the invention with conventional adhesives, such as. B. Epoxy-based adhesives connected.
  • the rim can have transverse reinforcement in order to further strengthen the impeller, in particular in the transverse or axial direction.
  • the transverse reinforcement runs azimuthally between the rim flanks, radially within the rim well and quasi parallel to it. It can also have a wave-shaped design and in any case ensures a higher compressive strength of the rim in the axial direction and thus more stability and rigidity of the impeller as a whole.
  • the transverse reinforcement e.g. B. also run azimuthally as part of the same directly between the radially inwardly pointing legs of the rim well. This creates space for the arrangement of further stabilizing stiffeners in the rim in the cavity radially inside the rim well between the rim flanks, i. H. where, for example, the spoke ribs can also be arranged.
  • the rim is also constructed like a kind of box spar. Compared to a solid (solid core) rim, it is significantly lighter and more elastic, but at the same time sufficiently stable and pressure-resistant.
  • the impellers can be provided or formed for this purpose, for example, with a web or a transverse rib.
  • the transverse rib running axially and radially, e.g. as a framework or framework, stiffens the rim in a wedge shape between the rim flanks.
  • the transverse rib can therefore, for. B. be introduced or installed directly between the rim flanks as a cross connection below the rim well and together with the rim flanks form a type of H-beam.
  • transverse ribs could be built into the rim in the circumferential direction in order to achieve the most uniform possible rigidity of the rim.
  • You could e.g. B. each be arranged in the vicinity of two adjacent recesses.
  • the frame construction known in principle from shipbuilding, thus improves stability while saving weight, e.g. B. compared to rims with solid core.
  • the transverse rib in the spoke rib can be designed as a kind of vertical wedge between its contact surfaces or depressions and contribute to further increasing its stability and thus also that of the rim of the wheel.
  • the transverse rib thus supports the inner surfaces between the contact surfaces of the spoke rib against one another. Compared to a spoke rib that is solidly or completely filled with material, this construction saves a lot of weight.
  • the impeller according to the invention can be produced, for example, as follows: The rim flanks, including their recesses, as well as all other components made of fiber composite materials are first cut by computer, milled etc.
  • prepregs from mats made of pre-impregnated carbon fibers, the so-called prepregs, before step A) two completely circular outer shells or, for manufacturing reasons, also consist of several circular ring sections which are only assembled to form a circular ring during assembly.
  • a first rim flank is then applied to a negative mold or assembly mold and is wetted with adhesive at least at the contact points with other subsequent components such as the spoke ribs and the rim base.
  • leading edge sections e.g. B. also cut from prepreg mats and positioned in the areas between the subsequently inserted spoke ribs.
  • step A) several of the prefabricated spoke ribs, that is to say each glued to at least one spoke, are positioned with the fitting lugs as a positioning aid in the recesses of the rim flank.
  • the spoke ribs hold the optional leading edge in place.
  • step B) the rim bed is inserted, which in turn holds the spoke ribs in position or is held in position by the spoke ribs.
  • a transverse reinforcement between the rim flanks and / or a leading edge to connect the two rim flanks to the first rim flank e.g. B. in indentations provided for this purpose in the curved contact surfaces in the spoke rib, inserted and glued.
  • step C) the second rim flank is placed on the previously described components, which are again wetted with adhesive for this purpose, after they have been produced in the manner described for the first rim flank. Now a second part of the assembly form is put on as a closing cover.
  • step D) the rim is connected to form an associated part and cured using the usual methods, for example in an autoclave with vacuum, hydraulic pressing or using screw clamps or the like.
  • step D) the hub can be positioned in the center of the rim and the spokes can be braced on the hub, for example screwed for bracing.
  • the invention thus enables the impeller to be manufactured in layers, in particular by axially inserting the spokes perpendicular to their longitudinal extension into the first rim flank up to a spoke position provided as intended. This considerably simplifies the manufacturing process, since the assembly of the impeller according to the invention can be carried out largely by machine, in particular almost fully automatically.
  • Figure 1 is a perspective, partially sectioned view of an embodiment of an impeller according to the invention
  • FIG. 2 shows a hub of the impeller according to FIG. 1,
  • FIG. 3 shows a spoke in a recess in a rim flank of the impeller according to FIG.
  • FIG. 4 shows a perspective, partially sectioned view of a rim of the impeller according to FIG. 1,
  • Figure 5 is a perspective view of the spoke rib according to Figure 4,
  • FIG. 6 shows an exploded view of a section of the impeller according to FIG. 1,
  • FIG. 7 shows a perspective view according to FIG. 6 in the assembled state
  • Figure 8 is a perspective cross-sectional view of a rim of another
  • Embodiment of the impeller according to the invention Embodiment of the impeller according to the invention.
  • FIG. 1 shows an impeller 1 according to the invention with a hub 2 and a rim 10 running circularly around the hub 2 in an azimuthal direction Az.
  • Twenty spokes 4a, 4b evenly distributed along the circumference of the impeller 1 run between the hub 2 and the rim 10 . They are - projected into a plane of rotation or extent of the impeller 1 - spoked largely tangentially with respect to the hub 2, whereby Two adjacent spokes 4a of a first rim flank 11 in the direction Az and two adjacent spokes 4b of a second rim flank 12 cross each other relatively shortly before their radially inner spoke end 6 in front of the hub 2 (see also FIG. 2) .
  • the spokes 4a, 4b are not attached in a rim center A (see. Fig.
  • an M-shaped rim bed 13 Radially outside between the rim flanks 11, 12 is an M-shaped rim bed 13 (see also FIGS. 4 and 8) as a support for a tire, not shown here, which with its radially inwardly bent legs on the inside of the rim flank surfaces 11A, 12A the rim flanks 11, 12 rests.
  • the spokes 4a, 4b have an embedded metallic thread 6g (see FIG. 2). They are thus clamped or screwed in an opening 2o or in a threaded hole in the hub 2.
  • a disc holder 2d with a 6-hole disc mount or adapter for attaching a disc brake to the hub 2 is embedded in the hub 2 in a form-fitting manner and glued in a force-fitting manner.
  • the hub 2 rotates about an axis running in the direction Ax (cf. FIG. 1), via which it is connected to two bearings.
  • the hub 2 accommodates the right spokes 4a on a first side of the wheel facing the viewer and the left spokes 4b on a second side facing away from the wheel.
  • FIG. 7 a plan view of the rim 10 radially outwards, the spokes 4a, 4b open with their radially outer spoke end 5 in pairs and each slightly offset in the direction Az in the rim flanks 11, 12.
  • the rim flanks 11, 12 are rectangular the rim center A starting recesses 11 o, 12o, through which the spokes 4a, 4b pass through the rim 10.
  • a spoke rib 20, not shown is arranged in each case, in which the spokes 4a, 4b are received and glued.
  • the respective spokes 4a, 4b intersect approximately in the plane of rotation of the impeller 1 (see FIG. 1).
  • Each spoke 4a thus crosses a further spoke 4a and a spoke 4b, or each spoke 4b crosses a spoke 4a and a further spoke 4b.
  • a left upper quarter of the impeller 1 in FIG. 1, shown in section, indicates how the outer spoke ends 5 of the spokes 4a, 4b open or are received in pairs in the respective spoke rib 20.
  • Each spoke rib 20 is held at a desired position in the rim 10 between the two rim flanks 11, 12 and a continuous annular rim base 13.
  • FIG. 3 shows a section of the second rim flank 12.
  • a spoke 4b runs radially outward through a recess 12o in the rim flank 12 to the rear flank surface 12A of the rim flank 12 and is glued there in the spoke rib 20 as required.
  • the spoke rib 20 rests with a contact surface 22 (see FIG. 4) on the rear flank surface 12A of the rim flank 12.
  • a fitting nose 24 of the spoke rib 20 protruding from the contact surface ensures its exact positioning along the rim flank 12.
  • the cross-sectional view according to FIG. 4 shows that a curvature of the contact surfaces 22 of the spoke rib 20 is adapted to an inner profile of the rim 10, i. H.
  • the spoke rib 20 is essentially U-shaped or V-shaped. It comprises two legs which carry two outside contact surfaces 21, 22, in each of which the recess 21v, 22v is formed toward the common concave inside of the spoke rib 20.
  • the depressions 21v, 22v are arranged offset to one another in the direction Az, so that the spokes 4a, 4b introduced therein can run past one another when they cross when they penetrate the plane of rotation of the impeller 1.
  • the arched rear sides 21 r, 22r of the depressions 21 v, 22v are used to position the rim base 13 during assembly by arranging the two legs of the rim base 13 butt against it.
  • spoke rib 20 When the spoke rib 20 (FIG. 5) is connected, radially outer spoke ends 5 of two spokes 4a, 4b are in the recesses 21v, 22v by means of an adhesive 23 glued in. At their radially inner end, the depressions 21v, 22v merge seamlessly into two protruding protrusions, the fitting lugs 24, 25.
  • the fitting noses 24, 25 protrude or protrude outwardly or outwardly from the contact surfaces 21, 22 of the spoke rib 20 in a ramp-shaped or plateau-shaped manner and thus each form a nose on the contact surfaces 21, 22, which serves as a positioning aid during assembly.
  • the fitting lugs 24, 25 each extend as far as an apex line of the spoke rib 20, at which the contact surfaces 21, 22 abut one another.
  • the fitting lugs 24, 25 are designed and arranged point-symmetrically to a center point of the apex line. You thus define the axial distance between the spokes 4a, 4b.
  • the fitting lugs 24, 25 also fill that space of the recesses 11 o, 12o that the spokes 4a, 4b do not take up (cf. FIG. 7). They close the rim base in the area of the recesses 11 o, 12o and also close flush with a radially inner outer side of the rim 10, so that a largely undisturbed surface of the rim 10 results.
  • the unit consisting of the spoke rib 20 and the spokes 4a, 4b according to FIG. 5 can be prepared separately for assembly and checked if necessary. It enables a particularly fast and automated assembly process.
  • a wave-shaped transverse reinforcement 40 is inserted between the legs of the rim well 13, which additionally supports or stiffens the rim 10, in particular the two rim flanks 11, 12 in the direction Ax.
  • the rim flanks 11, 12, the rim well 13, optionally the nose strips 30, as well as the spoke rib 20 and the spokes 4a, 4b are prefabricated from the semi-finished products, for example by means of a computer-controlled 3 or 5-axis CNC machine in a turning or milling process , for maximum precision of the cut. Manual cutting requires more time.
  • at least one of the two rim flanks 11, 12 can be designed with a J-shape in cross-section in order to avoid an unreinforced butt joint in the center of the rim.
  • the rim flanks thus overlap one another along the Az direction of the rim, so that an outer seam remains between the rim flanks in the center of the rim.
  • the short, curved, so-called leading edge section of the J-shaped rim flank extends arcuately over the center of the rim and, in the assembled state, is overlapped on the outside by the other, essentially straight rim flank up to the center of the rim. This ensures a closed rim base.
  • the latter can have a corresponding indentation for the curved leading edge section of the J-shaped rim flank at least on one side.
  • a rim flank with a leading edge is then connected to a rim flank without a leading edge together with the rim base to form the rim, so that the rim base is closed in the assembled state.
  • the rim flank without the leading edge is pushed against the shoulder of the J-shaped rim flank with an inwardly offset leading edge at the center of the rim in such a way that the rim flanks form a flush or offset rim surface.
  • a first rim flank 11 which has been cut to size and provided with the desired recesses 11 o, 12 o, is inserted into an assembly mold.
  • the size of the recesses 11 o, 12o depends on an azimuthal thickness Db and an axial thickness Da of the spokes 4a, 4b (see FIG. 7) and their desired installation depth in the direction Ax.
  • the azimuthal thickness Db of a spoke 4a, 4b determines the width b of the recess 11o, 12o.
  • the rim flank 11 can already be slightly bent in cross section or it can only be bent in the later connecting process of the individual components during curing.
  • nose strips 30 bent in a U shape and adapted in shape and curvature to the shape of the spoke rib 20 are arranged between the recesses 11 o in the rim flank 11 as a rim base substructure in order to simplify the connection of the rim flanks 11, 12.
  • the leading edge 30 will be like this positioned so that they rest half on the recess-side or radially inner half of the rim flank 11 and at a distance from the recesses 11o.
  • the leading edge strips 30 are not absolutely necessary. However, they simplify the cutting of the rim flanks 11, 12 and support the assembly of the wheel 1. In addition, they increase the rigidity and stability of the rim 10, since they ensure that the rim base is doubled.
  • the spoke rib 20 with the glued-in spokes 4a, 4b is then pushed or introduced into the assembly form from the direction Ax.
  • the fitting lugs 24, 25 formed on the spoke rib 20 help with the exact positioning along the rim 10 in the recesses 11o of the first rim flank 11, since the fitting lugs 24, 25 each have a size of one of the azimuthal width b and axial depth t the recesses 11 o, 12o correspond. Since the spoke rib 20 is a symmetrical component, it cannot be installed the wrong way round.
  • the spoke rib 20 at least partially overlaps the two adjacent leading edges 30 spaced apart from one another in the Az direction, so that a continuously connected, at least doubled-up rim base is created along the circumference of the wheel.
  • the spoke rib 20 has two flat leading edge indentations 26 (FIG. 6) in the curved contact surfaces 22 to the right and left of the fitting lugs 24, 25, which receive the end sections of the leading edge 30 in a form-fitting manner.
  • FIG. 7 shows in an assembled state of a section of the rim 10.
  • the impeller described in detail above and its manufacturing method are each only an exemplary embodiment that can be modified in various ways by the person skilled in the art without departing from the scope of the invention.
  • the invention is not limited to the flat spokes shown with an oval cross-section.
  • the shape of the rim of the impeller according to the invention is not limited to a u-shaped or v-shaped outer shape, but can, for example, also be c-shaped, almost rectangular or c-box-shaped.
  • the spoke rib can be shaped accordingly.
  • the use of the indefinite article “a” or “an” does not exclude the possibility of the characteristics in question appearing more than once.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

L'invention concerne une roue de roulement (1) pour un vélo, comprenant un moyeu (2), un certain nombre de rayons (4a, 4b) et une jante (10) en matériau composite renforcé par des fibres, la jante (10) présente deux côtés de jante (11, 12) et un creux de jante (13) et un certain nombre d'évidements (11 o, 12 o) dans les côtés de jante (11, 12) pour faire passer radialement les rayons (4a, 4b) à travers la jante (10) et/ou une nervure de rayon (20) pour fixer les rayons (4a, 4b) dans la jante (10). L'invention concerne également un procédé pour produire une roue de roulement de ce type.
EP20771783.6A 2019-09-04 2020-09-03 Roue de roulement pour vélo Pending EP4025437A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019123689 2019-09-04
PCT/EP2020/074670 WO2021043938A1 (fr) 2019-09-04 2020-09-03 Roue de roulement pour vélo

Publications (1)

Publication Number Publication Date
EP4025437A1 true EP4025437A1 (fr) 2022-07-13

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Application Number Title Priority Date Filing Date
EP20771783.6A Pending EP4025437A1 (fr) 2019-09-04 2020-09-03 Roue de roulement pour vélo

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Country Link
EP (1) EP4025437A1 (fr)
WO (1) WO2021043938A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6068347A (en) * 1997-11-13 2000-05-30 Shimano Inc. Bicycle wheel
FR2904581B1 (fr) 2006-08-03 2009-07-10 Salomon Sa Roue comprenant une jante, un moyeu, et un dispositif de raccordement de la jante au moyeu
US7635170B2 (en) * 2006-10-11 2009-12-22 Crank Brothers, Inc. Bicycle wheel
US20100301663A1 (en) 2009-05-26 2010-12-02 Mad Fibers, Llc Composite fiber bicycle wheels
DE102013012101A1 (de) * 2013-07-19 2015-01-22 Matthias Kübler Systemlaufrad für ein Fahrrad
DE102015104663A1 (de) * 2015-03-26 2016-09-29 Carbofibretec Gmbh Laufrad für ein muskelbetriebenes Fahrzeug mit einer speziellen Speichenanbindung an einer Felge

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