DE102015104663A1 - Impeller for a human-powered vehicle with a special spoke attachment to a rim - Google Patents

Abstract

The invention relates to an impeller (1) for a human - powered vehicle, comprising a rim (2) consisting at least partly of a fiber composite material and having a plurality of spokes (3) connecting the rim (2) to a hub (4) a cover portion (5) of the rim (2) penetrating end (9) of each spoke (3) is formed a mounting portion (6), which mounting portion (6) is fixed to the rim (2), wherein the cover portion (5) in such a formed on the rim (2) recess (7) is arranged, that the cover portion (5) forms an outer side (8) of the rim (2) with; a bicycle comprising such an impeller (1); and a method for producing such an impeller (1).

Description

The invention relates to an impeller for a human-powered vehicle, preferably a bicycle, with an at least partially made of a fiber composite material rim and with a plurality of spokes connecting the rim to a hub, wherein formed on a cover portion of the rim penetrating end of each spoke a mounting area is, which mounting area attached to the rim / with the rim (rotatably) is connected.

Generic rims are known from the prior art. Thus, for example, reveals DE 10 2007 036 065 A1 a wheel with a rim, a hub and at least one device for connecting the rim to the hub, said connecting device comprising a spoke. The rim in turn comprises a first and a second side wall, which face each other. A first connection reinforcement extends from the first side wall to the second. The first connection reinforcement comprises fibers, with the spoke passing through the reinforcement. Furthermore, a pressure is exerted by a mold, within which the individual, the spokes and the rims forming layers are inserted. This pressure allows portions of the layers and the ends of the spokes to penetrate into a core. As a result, the side walls have a geometric continuity.

In addition, generic prior art from the EP 1 985 434 A1 which discloses a method of manufacturing a wheel and a wheel itself. The wheel, in particular for a bicycle, comprises a rim, a hub body and spokes connecting the rim and the hub body. In essence, it consists of a fiber-reinforced material, wherein the rim comprises a rim base, a rim bottom and the rim base and the rim base connecting rim flanks. At least one rim flank is formed by a multi-ply and one-piece fabric section of a fibrous web comprising material.

For the connection of the spokes, it has been found that not only the usual forces during operation by means of a sufficient connection of the spokes are to be transmitted to the rim, but the attachment areas of the spokes are also particularly aerodynamic to integrate in the rim. In this context, it is particularly disadvantageous that for the spoke connection to the rim, again usually additional fiber layers made of fiber composite material must be used to implement the necessary support. However, this leads to an increased wheel weight, which in turn restricts the use of the impeller in high performance sports.

It is therefore the object of the present invention to remedy these known from the prior art disadvantages and in particular to provide an impeller available, which is both aerodynamically optimized in the field of spoke connection, and should have the lowest possible total weight.

This is inventively achieved in that the cover portion is arranged / fixed in such a recess formed on the rim that the cover (directly) forms an outer side of the rim with / forms. The cover portion is thus arranged so that it is no longer covered by additional fiber layers from the outside.

This allows a particularly lightweight construction of the impeller, wherein the cover is attached as the ultimate component of the rim. Due to the arrangement within the recess also a particularly low air resistance of the impeller is given, whereby the efficiency of the impeller or a bicycle is further increased with this impeller.

Further advantageous embodiments are claimed in the subclaims and explained in more detail below.

In this context, it is furthermore particularly advantageous if the cover section is (completely) made / formed from a fiber composite material. The cover section preferably comprises a plurality of reinforcing fibers formed as carbon fibers, glass fibers and / or aramid fibers. The reinforcing fibers of the fiber composite material of the cover portion are then more preferably designed as a woven, knitted or braided and embedded in a curable plastic matrix, such as a resin, so that the fiber composite material forms a fiber layer. In this case, the fiber composite material before mounting in the depression is more preferably designed as a "prepreg", i. as pre-impregnated, not yet cured fiber layer, whereby the attachment of the cover is implemented particularly easily.

It is furthermore advantageous if the cover section has a trapezoidal contact region with which it abuts flat in the depression / inside the depression (that is to say within an edge region / an outer contour of the depression). As a result, a particularly stable connection of the cover is given.

The strength of the connection of the cover portion is further improved by the cover portion to the entire mounting portion of the each spoke around flat in the depression.

In this context, it is also advantageous if a core of the rim of at least one (first) fiber layer (which is formed separately from the cover portion), which is also preferably made of a plurality of reinforcing fibers (carbon fibers, glass fibers and / or aramid fibers) fabric, knitted fabric or braid is surrounded, which fiber layer assumes / forms / forms the depression. The attachment region is then also particularly firmly arranged and fastened between the core / the first fiber layer of the rim and the cover section.

It is particularly advantageous if the cover is attached directly to this (first) fiber layer / connected to this / is glued to this. As a result, very few fiber layers are required to form the rim and the impeller.

In this context, it is also useful if the recess is formed by a recess incorporated in a core of the rim / introduced recess. Because of this, the core can be prepared geometrically for the formation of the depression before applying the other (first) fiber layer and / or the cover and / or the spoke, whereby the cover and the spoke during assembly particularly precise to the core or at the core surrounding (first) fiber layer can be attached. Thus, the fiber layer assumes the shape of the recess in the region of the recess.

If the recess / recess is formed in such a way that the recess has a first recessed area which is matched in its thickness and / or its outer contour to the cover section, the cover section is integrated even more aerodynamically in the rim.

In this context, it is also advantageous if the recess next to the first recessed area also has a second recessed area, which is matched with its thickness and / or its outer contour / its edge region on a voltage applied to the rim connecting portion of the attachment area (the respective spoke). As a result, the spoke connection is also arranged within a depression region, which further improves the aerodynamics. In this connection, it is particularly advantageous if the second recessed area is lower than the first recessed area and, with respect to its outer contour, is arranged within the outer contour of the first recessed area, thereby making it possible for the covering section to engage simultaneously in the first recessed area. covers the second well area with.

If the cover section is formed with a through-hole, preferably a cutout through-hole, through which a web region of the spoke adjoining the fastening region protrudes, the passage for the spoke can be adapted particularly effectively to the cross-section of the hardened spoke.

Expediently, at least the attachment region of the spoke consists of a (preferably fanned out) section of fiber composite material / a fiber composite material section, which is preferably embodied integrally with the spoke, wherein this fiber composite material section is non-positively and / or materially connected to the rim. Then the spoke connection is implemented particularly stable.

In this context, it is also advantageous if the attachment region of the spoke consists of a metal material, wherein the attachment region is then more preferably connected in a positive, force and / or material fit to the rim. As a result, material combinations of fiber composite and metal materials are effectively implemented.

If the cover section is configured to receive a metal spoke nipple, more preferably an inner side of the cover section facing the core forms a support surface for such a spoke nipple, the connection of the second spoke is further improved.

Furthermore, it is expedient if each depression is assigned a single covering section (i.e., a separate depression is designed for each covering section). This ensures that the number of splices is kept as low as possible.

In this context, it is also particularly advantageous if the cover at least partially forms a side edge of the rim, whereby the attachment of the cover is further optimized.

The cover section is surface-treated to further improve the aerodynamics on the outside with the forming surface / side surface optimized, such as ground.

The invention further relates to a bicycle with an impeller according to the invention according to one of the embodiments described above.

• a) Bereitstellen eines ringförmigen Kernes, der zumindest teilweise die Form einer Felge vorgibt,
• b) Einbringen einer Ausnehmung an einem Umfangsbereich des Kerns,
• c) Anbringen einer den Kern ummantelnden (ersten) Faserlage / Verstärkungsfaserlage, so dass die Faserlage eine die Form der Ausnehmung annehmende Vertiefung ausbildet, und
• d) Durchschieben / Durchstecken / Durchfädeln einer Speiche durch einen Abdeckabschnitt, sodass der Abdeckabschnitt von zumindest einem, einen Befestigungsbereich ausbildenden Ende der Speiche durchdrungen ist, und
• e) Befestigen des Abdeckabschnittes in der Vertiefung, wobei der Abdeckabschnitt und die Vertiefung derart aufeinander abgestimmt sind, dass der Abdeckabschnitt vollständig innerhalb einer Außenkontur der Vertiefung angeordnet ist und der Befestigungsbereich mit der Felge verbunden wird.

Furthermore, the invention also encompasses a method for producing / producing such an impeller with at least the following steps:

• a) providing an annular core which at least partially defines the shape of a rim,
• b) introducing a recess on a peripheral region of the core,
• c) attaching a (first) fiber layer / reinforcing fiber layer covering the core so that the fiber layer forms a depression assuming the shape of the recess, and
• d) pushing / passing / threading a spoke through a cover portion, so that the cover portion is penetrated by at least one, a fastening region forming end of the spoke, and
• e) attaching the cover portion in the recess, wherein the cover portion and the recess are matched to one another such that the cover portion is disposed completely within an outer contour of the recess and the mounting portion is connected to the rim.

As a result, a manufacturing method for the impeller according to the invention is effectively implemented. The steps a) to d) are preferably carried out in succession in the order from a) to d).

In this context, it is particularly advantageous if the core is made of a foam material, such as an open-pore or a closed-cell plastic foam material. If the core is made of a polymethacrylimide (PMI), more preferably a PMI hard plastic, but more preferably of a PMI-E rigid foam, consisting / produced, the recess can be introduced particularly effectively.

In this context, it is also particularly advantageous if the recess in the core by means of a punch (preferably a hot stamping / hot pressing process or a cold stamping / cold pressing process and preferably before attaching the fiber layer) incorporated / pressed / embossed / pressed. If the recess is further preferably formed by means of a hot stamping method / hot pressing method, the (rigid) / already solidified / cooled core is only somewhat thermally melted in the region of the (intended) recess (for the formation of these), whereby the recess is easily reproducible. It is also possible to introduce the recess by means of a cold stamping process, in which case the core is locally plastically deformed. As a result, the recess is particularly inexpensive introduced.

In further embodiments, the recess is introduced / milled into the (dimensionally stable / already solidified / cooled) core by means of a milling machining / milling process. Then the material surrounding the recess of the core is processed particularly gently.

It is also possible to form the recess already during prototyping of the core, preferably during foaming of the core consisting of a foam material, by arranging a corresponding negative mold on the outside of the core.

The (first) fiber layer is preferably wound on the core, while the cover section is formed separately in a separate manufacturing step to this fiber layer.

In this context, it is also advantageous if the attachment region consists of a fiber composite material and at the same time preferably not fully cured when attached to the rim, but is still deformable / wet formed. As a result, the spoke can be attached to the rim particularly cleverly at the same time as the cover section and the number of adhesive steps can be further reduced.

The invention will now be described in more detail below with reference to figures, in which context also different embodiments are explained.

Show it:

1 an isometric view of an impeller according to the invention according to an advantageous first embodiment, wherein particularly well a first side edge of the impeller can be seen, along which extend a plurality of cover portions, each receiving a spoke / a spoke end,

2 an isometric view of a segment of the impeller 1 in the region of the rim, wherein the receptacle of a first and a second spoke in two along the circumference of the rim spaced from each other and each to a side edge arranged covering portions can be seen,

3 an isometric view in detail of the wheel in the region of the rim, wherein particularly well the through hole of the cover portion, which is penetrated by the spoke, as well as the trapezoidal contact region of the cover are visible

4 an isometric detailed view of an impeller in the rim according to a further advantageous embodiment, in turn, the trapezoidal contact region of a cover is recognizable, in contrast to the cover from 3 has a bent towards the rim bottom extending outer contour,

5 an isometric view of the side of a cover section cut impeller after the 1 to 3 , where especially the rim cross-section can be seen,

6 an isometric view of an impeller in the rim in accordance with a further advantageous embodiment, wherein the rim, viewed in cross-section, in contrast to the rim of the 1 to 3 and 5 , which is reduced in height,

7 an isometric detailed view of an impeller in the rim according to a further advantageous embodiment, wherein the rim, viewed in cross section, also in contrast to the rim of the 1 to 3 and 5 , is reduced in height, unlike the rim of the 6 however, in their height is increased,

8th an isometric view of a prepared for the attachment of the spoke and the cover portion rim portion of the impeller after the 1 to 3 , wherein particularly well the shape of a depression can be seen, in which the spoke and the cover section are inserted,

9 an isometric detailed view of the cut rim shown 8th , wherein the rim is now cut in the region of the depression, so that the recess which predetermines the shape of the depression is particularly well recognizable in the core,

10 an isometric detailed view of the fully assembled rim according to 3 wherein the cover portion is shown transparent,

11 an isometric view of an impeller according to the invention according to a further advantageous embodiment, which is formed substantially like the first embodiment, but now each two opposite cover portions are arranged flush in the circumferential direction,

12 an isometric view of a rim segment of an impeller according to a further advantageous embodiment, wherein, in contrast to the embodiment of 11 which are formerly formed as a covering section in the two circumferentially opposite covering sections of two spokes, so that a covering section covers two fastening areas of two spokes,

13 an isometric view of a detail of a cover section along the circumference of a rim of the impeller after 12 .

14 a further embodiment of an impeller according to the invention in the region of its rim, wherein the cover portion in the region of the through holes now slightly narrower than the cover portion of the embodiment according to 13 is trained,

15 an isometric view of an impeller cut in the region of its rim according to a further advantageous embodiment, wherein the spoke shown now no longer made of a fiber composite material, as in the 1 to 14 but is made of a metal material and the attachment of the attachment area of the spoke between the cover portion and the core is visible,

16 an isometric sectional view of a rim of an impeller according to another embodiment, wherein the mounting portion of the spoke is now received positively in a spoke nipple within the cover, and

17 an isometric sectional view of a rim of an impeller according to a further embodiment, wherein the spoke nip with respect to the 16 centrally in the area of a rim base, flush with the fiber layer and on the cover section.

The figures are merely schematic in nature and are for the sole purpose of understanding the invention. The same elements are provided with the same reference numerals. Also, the individual features of the various embodiments are freely combinable.

In 1 is an inventive impeller 1 to recognize according to an advantageous first embodiment. The impeller 1 It usually serves as an impeller 1 a bicycle, which is not shown here for the sake of clarity. The impeller 1 thus serves for use in a muscle-powered vehicle.

The impeller 1 has a hub 4 on, on which it is rotatably mounted on a vehicle-fixed section. From this hub 4 out, centered to a rim 2 of the impeller 1 is arranged, extends a plurality of spokes 3 in the radial direction of the impeller 1 (ie with respect to one through the hub 4 formed axis of rotation radially) outwards to the rim 2 out. As a rim 2 Here, as usual, that area of the impeller 1 referred to, which is annular and the spokes 3 at one end 9 receives.

As already in 1 implied, is every spoke 3 of the impeller 1 in the area of their end 9 in which they have a mounting area 6 forms, according to the invention with a cover 5 Mistake. This cover section 5 is formed in the first embodiment of a fiber composite / fiber reinforced composite material. The cover section 5 is configured as a fiber layer / fiber layer section. In this embodiment, the reinforcing fibers contained in the fiber-reinforced composite material are made of a carbon material / carbon, but in other embodiments, other materials are implemented for such reinforcing fibers, for example aramid or glass fibers. A combination of these different fibers is carried out in a further embodiment.

In 5 is the construction of in 1 inserted rim 2 to recognize in detail. The rim 2 also consists in part of a fiber composite / fiber reinforced composite material. The rim 2 has a fiber layer formed from fiber composite, hereinafter referred to as the first fiber layer 12 is designated. This first fiber layer 12 is formed of a plurality of arranged to a fabric reinforcing fibers, wherein the first fiber layer 12 in further versions is also designed as a knit or braid.

The first fiber layer 12 surrounds a core 10 the rim 2 in an area of a rim floor 21 as well as two side edges 22 and 23 the rim 2 , The shape of the core 10 , which is preferably formed of a closed-pore, but alternatively also of an open-cell plastic foam material, essentially gives the shape of the rim 2 in front. In particular, this core gives 10 the rounded shape of the arranged on a radial inner rim base 21 as well as the shape of the rim base 21 from radially outward (substantially V-shaped to each other) extending side edges 22 and 23 in front. In addition, the core gives 10 in this embodiment, the shape of a rim base 24 the rim 2 in front. In the area of the rim base 24 forming, radially outwardly facing portion of the core 10 lies on the core 10 not the first fiber layer 12 but a rim bed reinforcement 25 on, the first with the first fiber layer 12 firmly connected. The rim bed reinforcement 25 is also preferably formed of a fiber composite material. The rim bed reinforcement 25 is substantially U-shaped and extends in the radial direction of the rim 2 , forming two rim flanges 26 . 27 , from the core 10 out of the way.

The first fiber layer 12 is so much about the core 10 around that they also put on the rim bed reinforcement 25 in the area of the rim flanges 26 . 27 is applied. The first fiber layer 12 is in a cured condition of the rim 2 both with the core 10 as well as with the rim bed reinforcement 25 firmly connected.

As continues in 5 can be seen is a rim height 28 the rim 2 by the radial distance between a radial inside of the rim bottom 21 , as well as a radial outside of the rim 2 , the radial outside of the arranged on a same radial height rim flanges 26 . 27 corresponds, defined. A rim width is here also in 5 by a distance of the two opposite outer sides of the rim flanges 26 . 27 ie an axial distance with respect to the axis of rotation of the impeller 1 between the opposite sides of the first fiber layer 12 , in the area of the rim flanges 26 . 27 Are defined. Particularly advantageous in this first embodiment, the rim height 28 between 38 mm and 42 mm, more preferably formed with about 40 mm. The rim width 29 is also preferably between 20 mm and 28 mm, more preferably designed with about 24 mm.

In this context, however, it is also possible, as particularly well in connection with the 6 and 7 can be seen in other embodiments of the impeller according to the invention 1 the rim height 28 to choose differently, such as in 6 can be seen, between 30 mm and 34 mm, more preferably form with about 32 mm. In a further embodiment according to 7 is the rim height 28 then with a value between 34 mm and 38 mm, particularly preferably with approx. 36 mm formed. The other embodiments of these two additional embodiments, as in 6 and 7 are shown, correspond to the first embodiment. Therefore, also the rim width 29 according to these two embodiments 6 and 7 according to the rim width 29 in 5 designed.

In the 8th to 10 is the attachment of a mounting area 6 a first spoke 3a exemplary for the other spokes 3 of the impeller 1 on the rim 2 by means of a cover section according to the invention 5 to recognize. On the rim 2 facing the end 9 the first spoke 3a , as in 10 represented, forms the first spoke 3a the attachment area 6 out. This attachment area 6 is an integral part of the first spoke 3a executed. The first spoke 3a has a section with an im Substantially along a longitudinal axis of constant cross-section, which section of the same cross-section as a land area 17 is designated. The first spoke 3a extends from one to the hub 4 attached second end of this bridge area 17 up to the rim 2 attached (first) end 9 out. With the second end is the first spoke 3a then again firmly with the hub 4 connected. The attachment area 6 is in this case that integral, ie substance einteilig with the web area 17 connected fiber composite section 30 that is relative to the land area 17 fanned / widened / flattened and is substantially delta-shaped. The first spoke 3a indicates at its attachment area 6 a smaller thickness but an increased width than the land area 17 on.

To accommodate this fanned fiber composite section 30 / mounting area 6 is in the rim 2 namely, in the pre-assembly of core 10 and first fiber layer 12 , According to the invention a depression 7 educated. This depression 7 is how in 9 to recognize indirectly by the formation of a recess 11 in the core 10 specified. The recess 11 again has two recessed areas 31 and 32 on. The first recess area 31 extends at a local peripheral area of the rim 2 from the rim bottom 21 out along a first side flank 22 with a substantially constant depth. This first recess area 31 is, as explained in more detail below, in its depth to the thickness of the cover 5 and with its outer contour on the outer contour of the cover 5 Voted.

Within this first recessed area 31 which is essentially trapezoidal / prismatic from the rim bottom 21 from radially outward to the first rim edge 22 widened towards, has in the middle a likewise extending in the radial direction second recess area 32 on. This second recess area 32 is centered within an outer contour / edge region of the first recessed area 31 placed / formed. The second recess area 32 has a greater depth than the first recess area 31 on, whereby the second recessed area with respect to the first recessed area 31 is discontinued.

The first fiber layer 12 so lies on the core 10 assume that they have the shape as well as contours of the recess 11 , in particular the two recessed areas 31 . 32 , reshapes / replicates. Thus, the first fiber layer forms 12 , as in 9 it is easy to see the depression 7 from, which has the same shape as the recess 11 of the core 10 , but now in their dimensions to the layer thickness of the first fiber layer 12 is reduced.

A first outer contour 19 a first recessed area 13 which is at the first recessed area 31 is formed together with a second recessed area 14 which is at the second recess area 32 is formed, and a second outer contour 20 trains, the recess 7 out. The first deepening area 13 is formed such that its depth is substantially the thickness of the cover portion 5 equivalent. Again, the depth of the second well area is 14 on the thickness of the fiber composite section 30 the first spoke 3a tuned so that the fiber composite section 30 the second recess area 32 preferably not surmounted to the outside. For this purpose, the second recessed area 14 a varying depth decreasing from a radially inner region to a radially outer region. This will take the second well area 14 one complementary to the fiber composite section 30 executed form (as the fiber composite section 30 also in the radial direction of the impeller 1 seen reduced in thickness outwards. An immersion reason 33 of the second recessed area 14 extends along an imaginary extension plane. This extension plane is preferably a plane extending along an imaginary line between the first end 9 and at the hub 4 mounted opposite second end of the first spoke 3a just extends.

The second well area 14 is so relative to the first recessed area 13 arranged that the second recessed area 14 with its (second) outer contour 20 completely from the (first) outer contour 19 of the first recessed area 13 is arranged.

As continues in 3 is particularly easy to see, the cover section 5 a substantially trapezoidal / prismatic investment area 18 on, at its the first outer contour 19 flat edge region within the first recessed area 13 is applied. The cover section 5 is in a mounted state of the first spoke 3a but also with its outside 8th formally to the outside 8th the rim 2 namely the depression 7 (in the area of the first side flank 22 as well as the rim floor 21 the rim 2 ) customized. In 3 as well as in 5 it can be seen that the first recessed area 13 not exactly with its thickness / depth on the thickness of the cover 5 is tuned. Consequently, the cover section projects beyond 5 to a certain extent outwardly the first recessed area 13 , Alternatively, however, it is also implemented in other embodiments, that the cover 5 flush with the recess 7 or to the first outer contour 19 adjacent area of the rim 2a (around respective side flank 22 . 23 as well as the rim floor 21 ) is trained.

The cover section 5 is always arranged and designed so that it is the outside 8th the rim 2 in the attached state directly with trains. The then in the cured / ready assembled state of the impeller 1 a connection section 15 forming fiber composite section 30 is together with the cover section 5 on the first fiber layer 12 glued. The cover section 5 then lies flat over the second recessed area 14 around at the first fiber layer 12 / in the depression 7 at.

In the manufacturing method of the impeller explained in more detail below 1 are when applying / fixing the first spoke 3a on the rim 2 both the fiber composite section 30 as well as the cover section 5 wet, ie impregnated with a resin, which resin has not yet cured so that the cover section 5 and the fiber composite section 30 exactly to the shape of the rim 2 and the depression 7 can be adjusted.

As in 3 can still be seen, the cover section 5 for carrying out the spoke 3a namely for the bridge area 17 a through hole 16 on. This through hole 16 in this embodiment is substantially rectangular, namely square from the cover section 5 cut out. This allows for a particularly aerodynamic implementation of the web area 17 / the first spoke 3a , and at the same time that when carrying out the spoke 3a the around the through hole 16 located reinforcing fibers of the cover 5 do not unintentionally deform / rip.

Radially outside the cover section 5 after the investment area 18 is on the outside 8th the rim further still a brake pad 37 formed, which has a structure that is optimized for braking. The thickness of this brake pad 37 picks up on the rim flanges 26 . 27 down.

With 4 is further apparent that the cover section 5 also in the radial direction of the impeller 1 may have a curved outer contour outwardly, which then the shape of the first outer contour 19 equivalent.

In 2 is then again a detailed view of a portion of the rim 2 to 1 shown, each with two individual spokes 3 (first spoke 3a as well as another second spoke 3b ), as well as the other spokes 3 the rim 2 like the first spoke 3a are formed, alternately together with a cover each 5 along the circumference of the rim 2 are arranged. In a circumferential direction of the rim 2 considered, are the respective, on opposite side flanks 22 respectively. 23 attached spokes 3 not at exactly the same height, but offset from each other, that is spaced along the circumferential direction to each other. How holistically in 1 It is easy to see that a cover section always changes along the circumference 5 together with the spoke 3 on the first side flank 22 with another cover section 5 as well as the assigned spoke 3 on the second side flank 23 from. The attachment of these spokes 3 However, as already described, the same design.

In a further alternative embodiment according to 11 However, it is also possible, the impeller according to the invention 1 with his rim 2 to train so that the two respect to the side edges 22 . 23 opposite cover sections 5 also along the circumferential direction at an equal height. Here is in 11 For example, to recognize that the cover sections 5 the two located on a substantially same height, opposite spokes 3 each with a separate cover section 5 on the rim 2 are attached.

Alternatively, however, it is also possible, as in 12 it can be seen that in such an arrangement according to 11 the opposite cover sections 5 for fixing two spokes 3 need not be formed from a separate fiber layer, but may also be formed from a single common fiber layer. Consequently, in 12 a holistic cover section 5 for two spokes 3 provided, this cover section 5 in an unrolled state is then formed in a substantially double trapezoidal shape. The respective broad sides then in turn close to the rim flanges 26 . 27 at. The cover section 5 as he is in 13 is clearly visible, thus extending from the first side flank 22 out in the radial direction inwards over the rim base 21 away to the second side flank 23 up again. Also, it is possible here, as in 14 to recognize this holistic two spokes 3 receiving cover section 5 in its extension regarding the scope to design something thinner.

It is also, as in connection with the 15 to 17 shown, possible, instead of the spokes made of a fiber composite material 3 , Spokes 3 to use of a metal material. As in 15 can be seen according to a further embodiment, is then between the first fiber layer 12 and the cover section 5 a fastening insert 34 introduced, who with its outside on the inside of the cover section 5 rests and an example. Roughened or threaded attachment area 6 the metal spoke 3 positively and positively holds. In this embodiment, only a first recessed area 13 necessary to the cover section 5 in the area of the outer contour 19 to fix.

In the embodiment according to 16 is still a spoke nipple 35 in addition to the attachment area 6 namely at the attachment area 6 trained external thread of the spoke 3 turned up / fastened. The spoke nipple 35 has an inside, ie between the cover 5 / the cover section and the fiber layer 12 recorded side a radial extension 16 on, the form-fitting through the attachment insert 34 and indirectly through the cover portion 5 is attached.

Furthermore, it is according to 17 also possible, instead of the spoke 3 / first spoke 3a / second spoke 3b in an offset to an imaginary (axial) center region of the rim 2 To arrange arranged area, the spokes 3 also in the central middle area of the rim 2 according to 17 to install. The recording / attachment of the mounting area 6 takes place according to 16 , wherein the fastening insert 34 integral with the cover section 5 is trained.

For the production of the impeller according to the invention 1 is preferably the core in a manufacturing process first 10 provided, which is then already formed annular. The core 10 already has the shape of the rim to be produced 2 on. In particular, the core gives 10 already the shape of the rim floor 21 as well as the two side edges 22 . 23 in front. Also the inside of the rim bed 24 is then through this core 10 specified. In a subsequent step, the recess then becomes 11 including their recess areas 31 and 32 at an intended peripheral area, in which later the spoke 3 is to be attached, introduced. Since the core is made of a foam material, namely an open-pored plastic foam material, this recess 11 by means of a hot stamp, that is pressed by means of a stamp printing process / hot stamping process. The temperature of the stamp is chosen such that the core 10 only in the area of this recess 11 , for the formation of this recess 11 plastically / thermally permanently deformed. This forms the permanent recess 11 out. Alternatively, it is also possible to use a cold stamp / a cold stamping method, in which case the stamp with an increased pressure on the already solidified core 10 is to be pressed, leaving a plastic, permanent recess 11 formed. Also, in other embodiments, the recess 11 by means of a milling machining / milling process in the already solidified core 10 to milled or the recess 11 already in the prototyping of the core 10 during foaming of the core of the foam material 10 by arranging a corresponding negative mold on the core outside.

After that, then the first fiber layer 12 to the core 10 applied. Preferably, the first fiber layer 12 by means of a winding process directly on the core 10 applied, wherein first several reinforcing fibers on the outside of the core 10 be wound up immediately. These wound-up reinforcing fibers then form a woven / knitted / braided structure and are either pre-impregnated with resin or impregnated with resin after winding. In this context, it is also possible, more fiber layers on the core 10 apply, this always the first and the second recessed area 13 . 14 ie the depression 7 form. In this embodiment, only a first fiber layer 12 so on the core 10 upset that they are the core 10 jacketed. The first fiber layer 12 then takes the shape of the recess 11 and forms the depression 7 out.

Following this, then the cover section 5 including the spoke 3 at this fiber layer 12 / on the rim 2 attached. When attaching is the cover 5 already through the end 9 the spoke 3 penetrated and forms the attachment area 6 out. This attachment area 6 will then go into the recess 7 including the cover section 5 used, wherein the outer contours / the edge region of the cover 5 and the depression 7 in the area of the first recessed area 13 are coordinated, so that the cover section 5 completely within the outer contour 19 the depression 7 is arranged.

Especially in the manufacture of the rim 2 as MTB and Gravel Roadbike rim are the spokes 3 outside on the previously wound rim 2 sticks and with a patch (cover section 5 ) to strengthen the bond and to make the whole thing visually attractive.

LIST OF REFERENCE NUMBERS

1

 Wheel

2

 rim

3

 spoke

3a

 first spoke

3b

 second spoke

4

 hub

5

 cover

6

 fastening area

7

 deepening

8th

 outside

9

 The End

10

 core

11

 recess

12

 fiber layer

13

 first deepening area

14

 second well area

15

 connecting portion

16

 Through Hole

17

 web region

18

 plant area

19

 first outer contour

20

 second outer contour

21

 rim base

22

 first side flank

23

 second side flank

24

 rim

25

 Rim reinforcement

26

 first rim flange

27

 second rim flange

28

 rim height

29

 rim width

30

 Fiber composite section

31

 first recess area

32

 second recess area

33

 recess base

34

 The fastener insert

35

 nipples

36

 extension

37

 brake pad

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007036065 A1 [0002]
• EP 1985434 A1 [0003]

Claims (15)

Wheel ( 1 ) for a human-powered vehicle, with a rim consisting at least partially of a fiber composite material ( 2 ) as well as with several spokes ( 3 ), the rim ( 2 ) with a hub ( 4 ), wherein at one a cover section ( 5 ) of the rim ( 2 ) penetrating end ( 9 ) each spoke ( 3 ) a mounting area ( 6 ), which mounting area ( 6 ) on the rim ( 2 ), characterized in that the cover section ( 5 ) in such a way on the rim ( 2 ) formed recess ( 7 ) is arranged, that the cover section ( 5 ) an outside ( 8th ) of the rim ( 2 ) with forms. Wheel ( 1 ) according to claim 1, characterized in that the cover section ( 5 ) is made of a fiber composite material. Wheel ( 1 ) according to claim 1 or 2, characterized in that the cover section ( 5 ) a trapezoidal investment area ( 18 ), with which it flat in the depression ( 7 ) is present. Wheel ( 1 ) according to one of claims 1 to 3, characterized in that the cover section ( 5 ) around the entire mounting area ( 6 ) around in the depression ( 7 ) is present. Wheel ( 1 ) according to one of claims 1 to 4, characterized in that the depression ( 7 ) by one in a core ( 10 ) of the rim ( 2 ) incorporated recess ( 11 ) is formed. Wheel ( 1 ) according to claim 5, characterized in that the core ( 10 ) of at least one fiber layer ( 12 ), which fiber layer ( 12 ) in the region of the recess ( 11 ) the shape of the depression ( 7 ). Wheel ( 1 ) according to one of claims 1 to 6, characterized in that the depression ( 7 ) a first recessed area ( 13 ), which in its thickness and / or its outer contour ( 19 ) on the cover section ( 5 ) is tuned. Wheel ( 1 ) according to one of claims 1 to 7, characterized in that the depression ( 7 ) a second recessed area ( 14 ), which with its thickness and / or its outer contour ( 20 ) on one on the rim ( 2 ) adjoining connecting section ( 15 ) of the attachment area ( 6 ) is tuned. Wheel ( 1 ) according to one of claims 1 to 8, characterized in that the cover section ( 5 ) with a through hole ( 16 ) is formed by the one to the attachment area ( 6 ) subsequent web area ( 17 ) the spoke ( 3 ) protrudes. Wheel ( 1 ) according to one of claims 1 to 9, characterized in that at least the attachment area ( 6 ) the spoke ( 3 ) from a fiber composite section ( 30 ) which is frictionally and / or materially connected to the rim ( 2 ) connected is. Wheel ( 1 ) according to one of claims 1 to 9, characterized in that at least the attachment area ( 6 ) the spoke ( 3 ) consists of a metal material, the form-fitting, non-positive and / or material fit with the rim ( 2 ) connected is. Bicycle with a wheel ( 1 ) according to one of claims 1 to 11. Method for producing an impeller ( 1 ) comprising the following steps: a) providing an annular core ( 10 ), which is at least partially in the form of a rim ( 2 ), b) introducing a recess ( 11 ) at a peripheral portion of the core ( 10 ), c) attaching a core ( 10 ) sheathing fiber layer ( 12 ), so that the fiber layer ( 12 ) one the shape of the recess ( 11 ) ( 7 ) d) pushing through a spoke ( 3 ) by a cover section ( 5 ), so that the cover section ( 5 ) of at least one, a mounting area ( 6 ) training end ( 9 ) the spoke ( 3 ), and e) attaching the cover section (FIG. 5 ) in the depression ( 7 ), wherein the cover section ( 5 ) and the depression ( 7 ) are matched to one another such that the cover section ( 5 ) completely within an outer contour ( 19 ) of the depression ( 7 ) and the attachment area ( 6 ) with the rim ( 2 ) is connected. Method according to claim 13, characterized in that the core ( 10 ) is made of a foam material, such as an open-pore or closed-cell plastic foam material. Method according to claim 13 or 14, characterized in that the recess ( 11 ) in the core ( 10 ) is pressed by means of a punch.

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