Rim and motor bicycle

Abstract

The invention relates to a rim, in particular for a motor bicycle, comprising a circumferential rim base, a hub bore extending along an axis of rotation, and a fastening region which is arranged between the rim base and the hub bore for fastening one or more brake discs, a first spoke being arranged between the fastening region and the rim base, and a second spoke being arranged between the fastening region and the rim base. A first spoke is arranged between the fastening region and the hub bore, and a second spoke is arranged between the fastening region and the hub bore, and the first spoke is designed and / or provided for transmitting forces in the radial direction and in the rotational direction, and the second spoke is designed and / or provided differently therefrom as an in particular ideal pressure lever.

Description

Technical Field

[0001] The present invention relates to a rim, for example, for a motorized bicycle, particularly a motorcycle rim, and a motorized bicycle. Background Technology

[0002] This invention relates particularly to rims whose brake discs or friction rings can be secured to the rim without the need for a separate inner ring. Manufacturing such rims simply and reliably is a significant challenge. Summary of the Invention

[0003] Therefore, the objective of this invention is to provide a wheel rim and a motorized bicycle, wherein the wheel rim is an improvement on a known structure.

[0004] This task is solved by the rim according to claim 1 and by the motorized bicycle according to claim 15. Other advantages and features are derived from the dependent claims, the description, and the drawings.

[0005] According to the invention, a rim, particularly for motorized bicycles such as motorcycles, comprises a surrounding rim base, a hub bore extending along the axis of rotation, and a fixing region disposed between the rim base and the hub bore for fixing one or more brake discs. A first spoke is disposed between the fixing region and the rim base, and a second spoke is disposed between the fixing region and the hub bore. The first spoke is designed and / or configured to transmit force in both the radial and rotational directions, and the second spoke is designed and / or configured differently, particularly as a pressure bar. According to a preferred embodiment, the rim is a front or rear wheel rim, particularly for motorized bicycles such as motorcycles or scooters. The fixing region may correspondingly be used at least on one side for fixing a sprocket. The rim may be indirectly mounted via a hub bore through an axle, for example, in a front fork or rear swingarm. The invention utilizes the fact that the force between the rim base and the fixing region acts entirely differently from the force between the fixing region and the hub bore. That is, only pressure needs to be transmitted between the hub bore and the fixed area, while braking force and / or driving force need to be transmitted between the fixed area and the rim bottom. This means that the force, especially, also acts in the circumferential direction there. This is not the case between the fixed area and the hub bore, so a pressure bar can be used there. Weight can be advantageously saved through this consistent design, since the pressure bar only needs to transmit force in its longitudinal direction, so it can be constructed to be correspondingly thin and / or slender. The fixed area is used, for example, to house one or more brake discs. The brake disc is preferably a brake disc with a friction ring, which is directly mounted / fixed to the fixed area. The expression "directly" here does not mean that a compensating element or similar element cannot be provided between the brake disc and the fixed area. However, the brake disc does not have a separate inner ring, which is connected to the outer ring / friction ring, for example, by a so-called floating element. The brake disc is fixed to the fixed area, for example, by means of bolts, for which the fixed area has corresponding bolt holes. The pressure bar is preferably designed and / or configured as an ideal pressure bar. This means that the pressure bar is preferably straight and is arranged / extended radially with strict or precise relative to the axis of rotation. According to a preferred embodiment, five second spokes are provided. This figure represents an ideal trade-off between stability, strength, and weight. Alternatively, more or fewer second spokes can be used.

[0006] According to a preferred embodiment, the second spoke is constructed as a flat bar with its wide side oriented parallel to the axis of rotation. According to a preferred embodiment, the flat bar has a thickness between 2 and 4 mm, particularly preferably about 3 mm. Viewed from the side along the axis of rotation, the second spoke is therefore very thin. The width of the wide side, measured along the axis of rotation, is, for example, in the range of 2 to 4 cm.

[0007] In one embodiment, the second spoke is formed by two separate spokes arranged side-by-side along the axis of rotation. This design further reduces weight compared to a single, "wide" second spoke.

[0008] Suitablely, the spokes taper radially and / or tilt toward each other, i.e., converge toward each other. A second spoke or spoke passes into a node. The number of nodes typically corresponds to the number of second spokes. A node is constructed, for example, as a cylinder extending along the axis of rotation and having holes at its ends for mounting or securing a brake disc.

[0009] According to a preferred embodiment, the nodes are connected in the rotational direction by intermediate spokes. Suitably, the intermediate spokes are constructed as straight elements that directly connect to the nodes.

[0010] According to a preferred embodiment, the intermediate spoke is constructed as a flat bar with its wide side oriented parallel to the axis of rotation. The description regarding the preferred wall thickness applies to the second spoke. The intermediate spokes are also consistently constructed as compression and / or tension bars, which can and must bear forces only in their longitudinal direction. Advantageously, the intermediate spokes can reinforce the joints, thereby reducing braking noise.

[0011] According to one embodiment, each of the intermediate spokes has at least one notch. Alternatively, the intermediate spokes may also be formed from two individual spokes.

[0012] Suitablely, a first spoke is provided at the node in the extension direction of the second spoke.

[0013] Because the first spoke must transmit a different force, its design is completely different from that of the second spoke.

[0014] According to a preferred embodiment, the first spokes each have two planar support sections oriented perpendicular to the axis of rotation and connected at least partially by planar connecting sections oriented parallel to the axis of rotation. In cross-sectional view, the first spokes thus suitably have a double-T structure. Therefore, force can also be transmitted in the circumferential / rotational direction.

[0015] According to one embodiment, the first spoke has at least one notch, particularly extending along the axis of rotation, on the end side adjacent to the bottom of the rim. This is used to further reduce weight. The planar support section is also suitable to have notches, recesses, or material removal portions, thereby further reducing its weight. The material removal portion is here suitably constructed on the planar support section.

[0016] According to one embodiment, the support section extends as a reinforcing element on or at the middle spoke. In other words, the reinforcing elements transition into or continue there in the middle spoke, and they function as reinforcing elements, particularly reinforcing the spoke, through their orientation. Advantageously, the joints can be additionally strengthened by the reinforcing elements, thereby reducing, for example, braking noise. As mentioned above, the support section is perpendicular to the axis of rotation, while the wide side of the middle spoke is perpendicular to the axis of rotation.

[0017] According to a preferred embodiment, the rim is a forged rim. The rim is particularly a one-piece forged rim, i.e., made from a single piece. Suitablely, the rim is mechanically finished. In particular, the aforementioned spokes, notches, holes, recesses, or the like can advantageously be produced by mechanical finishing.

[0018] The present invention also relates to a motor vehicle, particularly a motorized bicycle, comprising at least one rim according to the invention and at least one brake disc, wherein the brake disc has a friction ring, which is directly fixed to a fixed area of ​​the rim. Preferably, the brake disc is a so-called "riveted brake disc," which is directly mounted to the fixed area by means of a corresponding sleeve / rivet. The motorized bicycle is preferably a scooter (motorcycle) or, in particular, a motorcycle, and should also include multi-wheeled vehicles such as four-wheeled motorcycles or tilting multi-wheeled vehicles (LMWs). The above list should not be construed as exhaustive. Such a rim can also be used for other types of motor vehicles whenever possible.

[0019] Other advantages and features are derived from the following description of the rim embodiments with reference to the accompanying drawings. Attached Figure Description

[0020] The attached image is as follows:

[0021] Figure 1 A side view showing one embodiment of the rim of the present invention is shown;

[0022] Figure 2 As shown Figure 1 The AA cross-section shown in the figure;

[0023] Figure 3 As shown Figure 1 The BB cross-section shown in the figure;

[0024] Figure 4 As shown Figure 1 The CC cross-section shown is shown. Detailed Implementation

[0025] Figure 1A side view shows one embodiment of a rim 1 having a hub bore 4 extending along the axis of rotation R. The hub bore 4 is used, for example, to accommodate an axle (not shown) about which the rim 1 can rotate. A fixed area, indicated by reference numeral 30, has a plurality of nodes 32 with holes 36 at their ends for accommodating a brake disc (not shown). Five second spokes 20 extend between the nodes 32 and the hub bore 4, these spokes being explicitly designed as and / or configured as pressure bars. It can be seen that these spokes are very thin in the side view shown here. This is because the second spokes 20 are suitably constructed as pure pressure bars, which do not bear or transmit force in the direction of rotation. The second spokes 20 are preferably flat bars with their wide sides extending along the axis of rotation R. This is in Figure 4 This is particularly evident in the middle. Intermediate spokes 34 extending between nodes 32 are constructed in a similar manner. First spokes 10 are constructed in the extension direction of the second spokes 20, these first spokes 10 having planar support sections 12 oriented perpendicular to the axis of rotation R. On the end side facing the rim base 2, the first spokes 10, in the embodiment shown here, have notches or holes 18 for further weight reduction. The reason for the different design of the first spokes 10 (relative to the second spokes 20) is that, in addition to pressure, forces in the circumferential / rotational direction must be transmitted between the fixed area 30 and the rim base 2 of the rim 1. Schematically shown, the right-hand intermediate spoke 34 has reinforcing elements 39. These reinforcing elements are formed by support sections 12 extended in a corresponding manner. The support sections 12 can continue on the intermediate spokes 34 as spokes extending perpendicularly thereto, thereby additionally reinforcing the nodes 32.

[0026] Figure 2 As shown Figure 1 The AA cross-sectional view shown is particularly noticeable. The central spoke 34, which currently has a notch 38, is visible. This notch is introduced, for example, through machining. Two nodes 32 are also visible, each having a hole 36 at its end for mounting or securing a brake disc. Dashed lines indicate reinforcing elements 39, which may transition directly into the support section 12, or vice versa, see also distance a.

[0027] Figure 3 Show Figure 1 The diagram shows a simplified cross-sectional view of BB (rotated 90°). Particularly relevant here is the cross-sectional view of the first spoke 10, which has two support sections 12 connected by a connecting section 14. Notches or recesses 18 are provided on the outer sides of the planar support sections 12. The support sections 12 are spaced apart by a distance a, also see... Figure 2 The distance a of the reinforcing element 39 in the middle.

[0028] Figure 4Finally, a CC cross-sectional view extending along the second spoke 20 is shown. The second spoke 20 currently has two spokes 22, which are constructed to taper gradually in the radial direction relative to the axis of rotation R. A notch 38 is provided between the spokes 22. This notch can also be formed, for example, by subsequent machining. Furthermore, a node 32 is shown in the cross-sectional view, at which two holes 36 are provided on the end side. The first spoke 10 or the corresponding support section 12 extends radially away from the node 32.

[0029] List of reference numerals

[0030] 1 rim

[0031] 2-wheel rim bottom

[0032] 4 hub holes

[0033] 10 First spoke

[0034] 12 Support Sections

[0035] 14 connecting sections

[0036] 16 dimples

[0037] 18 notches

[0038] 20 Second spoke

[0039] 22 spokes

[0040] 30 fixed areas

[0041] 32 nodes

[0042] 34 center spokes

[0043] 36 holes

[0044] 38 notch

[0045] 39 Reinforcing Components

[0046] a distance

[0047] R rotation axis

Claims

1. A rim (1), particularly for motorized bicycles, comprising a surrounding rim base (2), a hub bore (4) extending along a rotation axis (R), and a fixing region (30) disposed between the rim base (2) and the hub bore (4) for fixing one or more brake discs, wherein, A first spoke (10) is provided between the fixed area (30) and the rim bottom (2), and a second spoke (20) is provided between the fixed area (30) and the hub hole (4). The first spoke (10) is designed and / or configured to transmit force in the radial direction and in the rotational direction, and the second spoke (20) is designed and / or configured to be a pressure bar, especially ideal.

2. The wheel rim according to claim 1, wherein, The second spoke (20) is straight and extends in the radial direction.

3. The wheel rim according to claim 1 or 2, wherein, The second spoke (20) is constructed as a flat bar, and its wide side is oriented parallel to the axis of rotation (R).

4. The rim according to any one of the preceding claims, wherein, The second spoke (20) is formed by two sub-spokes (22), which are arranged side by side along the axis of rotation (R).

5. The wheel rim according to claim 4, wherein, The two spokes (22) gradually taper in the radial direction and / or tilt toward each other.

6. The rim according to any one of the preceding claims, wherein, The fixed area (30) has multiple nodes (32), at which the second spoke (20) terminates, and openings or holes (36) for fixing the brake disc are constructed in the nodes (32), especially on both sides.

7. The wheel rim according to claim 6, wherein, The nodes (32) are connected by intermediate spokes (34) in the rotational direction.

8. The wheel rim according to claim 7, wherein, The middle spoke (34) is a flat bar with its wide side oriented parallel to the axis of rotation (R).

9. The rim according to any one of claims 7 to 8, wherein, The intermediate spokes (34) each have at least one notch (38).

10. The rim according to any one of claims 6 to 9, wherein, A first spoke (10) is provided at a node (32) in the extension direction of the second spoke (20).

11. The rim according to any one of the preceding claims, wherein, The first spoke (10) has two planar support sections (12) oriented perpendicular to the axis of rotation (R) and connected at least partially by a planar connecting section (14) oriented parallel to the axis of rotation (R).

12. The rim according to any one of the preceding claims, wherein, The first spoke (10) has at least one notch (18) on the end side.

13. The rim according to any one of claims 11 to 12, wherein, The support section (12) continues as a reinforcing element (39) on or at the middle spoke (34).

14. The rim according to any one of the preceding claims, wherein, The rim (1) is a forged rim.

15. A motor vehicle, particularly a motorized bicycle, comprising at least one rim (1) according to any one of the preceding claims and at least one brake disc, wherein, The brake disc has a friction ring, which is fixed, in particular directly, to a fixed area of ​​the rim (1).

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