Spoke disc and connecting structure of spokes and hub

Abstract

The utility model relates to a spoke disc which comprises a connecting disc, a first mounting hole is formed in the middle of the connecting disc, the edge of the connecting disc is bent upwards to form a mounting part, a second mounting hole is formed in the side edge of the mounting part, a mounting space is formed between the mounting part and the connecting disc, and the mounting space is communicated with the second mounting hole. The second installation holes are used for being connected with the end portions of the spokes in a clamped mode, installation grooves are formed in the positions, corresponding to the second installation holes, of the installation space, and the end portions are embedded in the installation grooves. The utility model further discloses a connecting structure of the spokes and the hub. The spoke disc and the hub are completely separated and can be replaced, the installation groove is formed in the installation portion, the spokes can be detachably connected with the installation groove, the spokes are arranged in the installation space and are not prone to falling off, and installation and maintenance are more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycle parts, in particular to a spoke disc and a connecting structure between spokes and a hub. Background Art

[0002] The hub, as a core component in the bicycle hub system, plays a vital role. Located in the center of the wheel, it is the key part connecting the spokes and the axle.

[0003] The main types of existing hubs are as follows:

[0004] 1. The hub shell and the spoke flange (also called the flange) are made of metal as a whole. To support the transmission of force, the spoke flange is thick and heavy, which is not conducive to the weight control of the hub.

[0005] 2. Although the existing known spoke mounting plate structure design that is separated from the hub shell body also completes the separation of the spoke mounting plate from the hub shell body, the existing structure still needs to be bonded to the spokes and cannot be removed. If a spoke is damaged, the entire spoke mounting plate must be replaced, such as CN 113942340 B; or it requires the use of specially customized conjoined spokes, and repair parts are difficult to obtain, such as CN 219727734 U.

[0006] Therefore how to avoid the above problems needs to be solved urgently. Summary of the Invention

[0007] The purpose of the utility model is to provide a spoke disc and a connection structure between the spokes and the hub, so as to solve the problems in the background art that the hub is too heavy and the spokes are inconvenient to repair.

[0008] To achieve the above-mentioned purpose, the utility model discloses a spoke disk, comprising: a connecting disk, a first mounting hole is opened in the middle of the connecting disk, the edge of the connecting disk is bent upward to form a mounting portion, a second mounting hole is provided on the side of the mounting portion, an installation space is formed between the mounting portion and the connecting disk, and the installation space is connected to the second mounting hole, the second mounting hole is used to clamp the end portion of the spoke, and a mounting groove is provided in the installation space corresponding to the position of the second mounting hole, and the end portion is embedded in the mounting groove.

[0009] Preferably, the mounting groove protrudes in a direction away from the first mounting hole, and the cross-section of the mounting groove is U-shaped.

[0010] Preferably, the mounting portion is inclined downwardly toward the connection plate, and an angle a is provided between the mounting portion and the plane where the connection plate is located. The value range of the angle a is 3-10°.

[0011] Preferably, the second mounting hole is inclined downwardly of the connecting plate, and an angle b is formed between an axis of the second mounting hole and a plane where the connecting plate is located, and a value range of the angle b is 3-10°.

[0012] Preferably, there are 5-10 mounting grooves evenly distributed on the side of the connecting disk. The cross-sectional shape of the first mounting hole is set to a rotation-stopping shape so that the connecting disk does not rotate axially after installation, and the inner wall of the first mounting hole is set at an angle.

[0013] Preferably, an extension section 230 protrudes from the upper end of the mounting portion 200 into the connecting plate 100 , and the extension section 230 covers the end portion 510 .

[0014] Preferably, the extension sections enclose a groove, the cover plate is embedded in the groove, a third mounting hole is opened in the middle of the cover plate, and the position of the third mounting hole corresponds to that of the first mounting hole.

[0015] Preferably, the connecting plate, the mounting portion and the extension section are all made of carbon fiber material and are integrally formed.

[0016] Preferably, the edge of the first mounting hole protrudes upward to form a fixing portion, and the inner wall of the fixing portion is inclined toward the center of the first mounting hole.

[0017] A spoke-hub connection structure includes the spoke disc, a hub shell body, and spokes. The spoke disc is detachably mounted on the hub shell body, and one end of each spoke is fixedly connected to the spoke disc. A spoke is provided with a head portion at one end near the spoke disc, the head portion having a U-shaped cross-section and engaging with a mounting slot.

[0018] Preferably, the spokes are straight-pull spokes or elbow spokes.

[0019] The utility model has the following beneficial effects:

[0020] This new design features mounting grooves in the mounting portion, allowing the spokes to fit snugly into the grooves. This reduces spoke shaking and spoke shedding caused by rotation or wheel impact. This extends the spoke disc's service life and ensures stable spoke installation. The spoke disc is completely separate and replaceable from the hub, allowing spokes to be removed from the disc and compatible with standard metal or carbon fiber spokes on the market, making installation and maintenance more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a bicycle wheel provided in a specific embodiment of the present utility model;

[0022] Figure 2This is a partial enlarged schematic diagram provided in a specific embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the overall structure of the spoke disc provided in a specific embodiment of the present utility model;

[0024] Figure 4 This is a plan view of a spoke disc provided in a specific embodiment of the present utility model;

[0025] Figure 5 A cross-sectional view of BB provided in a specific embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the overall structure of the cover provided in a specific embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of spokes provided in a specific embodiment of the present invention installed on a spoke wheel;

[0028] Figure 8 This is a schematic diagram of spokes provided in a specific embodiment of the present invention installed on a spoke wheel;

[0029] Figure 9 This is a partial enlarged schematic diagram of point D provided in a specific embodiment of the present utility model;

[0030] Figure 10 This is a structural diagram of a spoke disc provided in a specific embodiment of the present utility model;

[0031] Figure 11 A structural diagram of a spoke disc provided in a specific embodiment of the present utility model;

[0032] Figure 12 A schematic diagram of a hub with an aluminum alloy spoke disc provided in a specific embodiment of the present utility model;

[0033] Figure 13 This is a schematic diagram of the force analysis of the yield force of the non-driving side of the split spoke disc provided in the first specific embodiment of the present utility model;

[0034] Figure 14 This is a schematic diagram of the yield force analysis of the non-driving side of the integrated spoke disc provided in the first specific embodiment of the present invention;

[0035] Figure 15 This is a schematic diagram of the yield force analysis of the driving side of the split spoke disc provided in the first specific embodiment of the present invention;

[0036] Figure 16 This is a schematic diagram of the yield force analysis of the driving side of the integrated spoke disc provided in the first embodiment of the present invention;

[0037] Figure 17 This is a schematic diagram of the force analysis of the non-driving side ESTRN of the split spoke disc provided in the first specific embodiment of the present invention;

[0038] Figure 18 This is a schematic diagram of the force analysis of the non-driving side ESTRN of the integrated spoke disc provided in the first specific embodiment of the present invention;

[0039] Figure 19 This is a schematic diagram of the force analysis of the driving side ESTRN of the split spoke disc provided in the first specific embodiment of the present invention;

[0040] Figure 20 This is a schematic diagram of the force analysis of the driving side ESTRN of the integrated spoke disc provided in the first specific embodiment of the present invention;

[0041] Figure 21 This is a schematic diagram of the force analysis of the non-driving side URES of the split spoke disc provided in the first embodiment of the present invention;

[0042] Figure 22 This is a schematic diagram of the force analysis of the non-driving side URES of the integrated spoke disc provided in the first specific embodiment of the present invention;

[0043] Figure 23 This is a schematic diagram of the force analysis of the URES driving side of the split spoke disc provided in the first embodiment of the present invention;

[0044] Figure 24 This is a schematic diagram of the force analysis of the integrated spoke disc driving side URES provided in the first specific embodiment of the present invention.

[0045] Description of main components symbols:

[0046] 100, connecting plate; 110, first mounting hole; 111, fixing portion; 200, mounting portion; 210, second mounting hole; 220, mounting groove; 230, extension section; 250, mounting space; 400, cover plate; 500, spoke; 510, end portion; 600, hub shell body. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0048] Example 1

[0049] like Figures 1 to 6As shown, the utility model provides a spoke disk, including: a connecting disk 100, a first mounting hole 110 is opened in the middle of the connecting disk 100, the edge of the connecting disk 100 is bent upward to form a mounting portion 200, and a second mounting hole 210 is provided on the side of the mounting portion 200, and an installation space 250 is formed between the mounting portion 200 and the connecting disk 100, and the installation space 250 is connected to the second mounting hole 210, and the upper end of the mounting portion 200 protrudes an extension section 230 into the connecting disk 100, the second mounting hole 210 is used to clamp the end portion 510 of the spoke, and the extension section 230 covers the end portion 510, and the installation space 250 is provided with a mounting groove 220 corresponding to the position of the second mounting hole 210, and the end portion 510 is embedded in the mounting groove 220.

[0050] In this embodiment, the mounting groove 220 protrudes away from the first mounting hole 110 and has a U-shaped cross-section. When one end of a spoke 500 is installed in the mounting groove 220, the end portion 510 of the spoke 500 engages with the mounting groove 220, thereby reducing wobble of the spoke 500 and friction between the spoke 500 and the second mounting hole 210, preventing the diameter of the second mounting hole 210 from rapidly increasing, thereby extending the service life of the spoke disc. Similarly, the U-shaped surface where the mounting groove 220 and spoke 500 contact each other also reduces wear caused by friction between the mounting groove 220 and the end portion 510.

[0051] The cross-sectional shape of the first mounting hole 110 is configured to prevent the connecting disc 100 from axial rotation after installation. The inner wall of the first mounting hole 110 is inclined. In this embodiment, the first mounting hole 110 is a regular polygon with rounded corners. The first mounting hole 110 is used to connect to the hub shell body. The hub shell body is provided with an inclined surface that mates with the first mounting hole 110. The two inclined surfaces cooperate with each other to enhance the connection strength between the hub shell body and the spoke disc through friction. The interaction of the inclined surfaces eliminates the need for adhesive bonding between the first mounting hole 110 and the hub shell body.

[0052] There are 5-10 mounting slots 220, seven in this embodiment, evenly distributed along the side of the connecting plate 100. In this embodiment, the mounting slots 220 protrude away from the connecting plate 100, giving the spoke plate a seven-pointed star shape. The connecting plate 100, mounting portion 200, and extension 230 are integrally formed and made of carbon fiber.

[0053] The extension 230 encloses a recess, into which the cover 400 is inserted. A third mounting hole is defined in the center of the cover 400, corresponding to the position of the first mounting hole 110. In this embodiment, the cover 400 is adhered to the recess with adhesive to prevent dust from entering the mounting groove 220. Dust entering the mounting groove 220 can increase friction between various components, causing rapid wear and shortening their service life.

[0054] like Figure 5 As shown, the mounting portion 200 is inclined downwardly toward the connecting disk 100, and the angle between the mounting portion 200 and the plane where the connecting disk 100 is located is a, and the value range of the angle a is 3-10°. In this embodiment, the spoke disk and the bicycle rim are not on the same horizontal plane, so there is an angle between the spoke 500 and the spoke disk. In order to facilitate the installation of the spoke 500 and reduce the stress of the spoke 500 after installation, the mounting portion 200 is set toward the bicycle rim, and the angle between the mounting portion 200 and the plane where the connecting disk 100 is located is 8°.

[0055] The second mounting hole 210 is inclined downwardly from the connecting disk 100. The angle b between the axis of the second mounting hole 210 and the plane where the connecting disk 100 is located is 3-10°. In this embodiment, the spoke disk and the bicycle rim are not on the same horizontal plane. Therefore, there is an angle between the spoke 500 and the spoke disk. In order to facilitate the installation of the spoke 500 and reduce the friction between the spoke 500 and the second mounting hole 210 after installation, the mounting portion 200 is arranged toward the bicycle rim. The angle between the axis of the second mounting hole 210 and the plane where the connecting disk 100 is located is 8°.

[0056] Unlike existing spoke mounting plates, the spoke mounting plate of the present invention is completely detachable and replaceable. The spoke mounting plate of the present invention is made of carbon fiber and can be used with standard, commercially available metal spokes. A performance comparison of the spoke mounting plate of the present invention using carbon fiber and aluminum alloy is shown in Table 1 below.

[0057] Table 1

[0058]

[0059] As can be seen from Table 1, the spoke disc made of carbon fiber material in the present invention is not only lighter, but also has better strength and fatigue resistance than traditional aluminum alloy materials, thus solving the durability problem of the spoke holes and the entire hub.

[0060] Example 2

[0061] like Figure 10As shown, this embodiment differs from the first embodiment in that the edge of the first mounting hole 110 protrudes upward to form a fixing portion 111, and the inner wall of the fixing portion 111 is inclined toward the center of the first mounting hole 110. The fixing portion 111 is configured to directly contact the hub shell body 600. The inclined inner wall of the fixing portion 111 effectively improves the matching precision between the spoke disc and the hub shell body 600, increases the static friction between the fixing portion 111 and the hub shell body 600, and makes the connection between the hub shell body 600 and the fixing portion 111 more stable and reliable.

[0062] Example 3

[0063] like Figure 7 As shown, a spoke-hub connection structure includes a spoke plate, a hub shell body 600, and spokes 500. The spoke plate is detachably mounted on the hub shell body 600, and one end of the spoke 500 is fixedly connected to the spoke plate. Spokes 500 are provided with end portions 510 near the spoke plate. The end portions 510 have a U-shaped cross-section and fit into mounting slots 220.

[0064] In this embodiment, the side of the end portion 510 adjacent to the mounting groove 220 is also configured as an arc surface. The arc surfaces of the end portion 510 and the mounting groove 220 are close to each other, effectively increasing the contact area. This large contact area also means greater friction and adhesion, helping to prevent relative sliding or misalignment of the parts when subjected to external forces. This ensures the stability of the installation of the spoke 500 and reduces friction between the spoke 500 and the second mounting hole 210. Furthermore, due to the increased and evenly distributed contact area, this design helps reduce local wear between the end portion 510 and the mounting groove 220, thereby extending the service life of the parts.

[0065] like Figure 7 As shown, the spokes 500 are straight-pull spokes. The end 510 of the straight-pull spoke is connected to the hub's mounting slot 220, and the other end is connected to the rim, where it is tensioned in a straight line. This design helps improve the rigidity and responsiveness of the wheel set by reducing bending and deformation of the spokes under load. However, the straight-pull spokes are limited in their weaving method, and a cross weaving method cannot be used. This requires the hub design to achieve a cross weaving method.

[0066] like Figures 8-9 As shown, the spoke 500 is an elbow spoke, the end portion 510 of the elbow spoke is connected to the mounting groove 220 of the hub, and the other end is connected to the wheel rim. The elbow spoke can be woven freely and without restriction.

[0067] Flexible use of different spokes can adapt to more usage scenarios and different usage needs.

[0068] Example 4

[0069] like Figure 11 As shown, the difference between this embodiment and the first embodiment is that the spoke disc has a disc-like appearance.

[0070] In order to further compare the performance of the carbon fiber spoke disc of the utility model with that of the aluminum alloy spoke disc, the hub formed by installing the split carbon fiber spoke disc of the utility model on the aluminum alloy hub shell body was compared with the hub with the aluminum alloy spoke disc (such as Figure 12 A comparative experiment was conducted.

[0071] Experimental group: A hub with the carbon fiber spoke disc of the present invention installed on an aluminum alloy hub shell body, spokes were installed on the carbon fiber spoke disc, and tension was applied to the spokes to test various data of the spoke disc after tension.

[0072] Control group: A hub with an aluminum alloy spoke disc. The aluminum alloy spoke disc and the aluminum alloy hub shell body are an integrated structure. Spokes (the same as those in the experimental group) are installed on the control aluminum alloy spoke disc, and tension is applied to the spokes to detect various data of the spoke disc after tension.

[0073] Yield force: refers to the phenomenon that when the stress reaches a certain value during the stretching or compression process of the material, the stress increases slightly while the strain increases sharply, resulting in changes. Figures 13-16 This is a yield force analysis diagram for the split carbon fiber spoke disc and the integrated aluminum alloy spoke disc of the present invention. Wheelset conditions: 1. Identical spokes; 2. Identical spoke weaving method. Both spokes were simultaneously subjected to a 1400N tensile force. The analysis results are shown in Table 2 below:

[0074] Table 2

[0075]

[0076]

[0077] As can be seen from Table 2, the split carbon fiber spoke disc can withstand greater stress than the integrated aluminum alloy spoke disc under the same stress conditions, which is 10 times that of the aluminum alloy spoke disc.

[0078] ESTRN: describes the deformation of a material under load. In finite element analysis, equivalent strain is an important parameter for measuring local deformation of a material. It represents the average deformation of the material under load. Figures 17-20 This is a force analysis diagram for the ESTRN wheel assembly of the present invention's split carbon fiber spoke disc and the integrated aluminum alloy spoke disc. Wheelset conditions: 1. Identical spokes; 2. Identical spoke weaving method. Both spokes were simultaneously subjected to a 1400N tensile force. The analysis results are shown in Table 2 below:

[0079] Table 3

[0080]

[0081] As can be seen from Table 3, when the split carbon fiber spoke disc is subjected to the same force and the same deformation as the integrated aluminum alloy spoke disc, the split carbon fiber spoke disc requires at least 10 times the force to produce the same deformation as the split aluminum alloy spoke disc.

[0082] URES represents the composite displacement of an object after being acted upon by multiple forces. This displacement is the result after considering the combined effects of all forces. Figures 21-24 This is a force analysis diagram for the split carbon fiber spoke disc and the integrated aluminum alloy spoke disc URES of the present invention. Wheelset conditions: 1. Identical spokes; 2. Identical spoke weaving method. Both spokes were simultaneously subjected to a 1400N tensile force. The analysis results are shown in Table 4 below:

[0083] Table 4

[0084]

[0085] If the spoke disc is pulled to the breaking value, the split carbon fiber flange disc of the present invention requires greater force. The breaking value of the split carbon fiber spoke disc of the present invention can withstand a force at least 10 times that of the one-piece aluminum alloy spoke disc in the control group.

[0086] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A spoke disc, characterized in that: include: A connecting disk (100) is provided with a first mounting hole (110) in the middle of the connecting disk (100), an edge of the connecting disk (100) is bent upward to form a mounting portion (200), a second mounting hole (210) is provided on the side of the mounting portion (200), an installation space (250) is formed between the mounting portion (200) and the connecting disk (100), and the installation space (250) is communicated with the second mounting hole (210), the second mounting hole (210) is used to clamp the end portion (510) of the spoke, a mounting groove (220) is provided in the installation space (250) corresponding to the position of the second mounting hole (210), and the end portion (510) is embedded in the mounting groove (220).

2. A spoke disc according to claim 1, characterized in that: The mounting groove (220) protrudes in a direction away from the first mounting hole (110), and the cross-section of the mounting groove (220) is U-shaped.

3. The spoke disc according to claim 2, characterized in that: The mounting portion (200) is inclined downwardly of the connecting disk (100), and an angle a is formed between the mounting portion (200) and the plane where the connecting disk (100) is located. The value range of the angle a is 3-10°.

4. A spoke disc according to claim 3, characterized in that: The second mounting hole (210) is inclined downwardly of the connecting disk (100), and an angle b is formed between an axis of the second mounting hole (210) and a plane where the connecting disk (100) is located. The value range of the angle b is 3-10°.

5. The spoke disc according to claim 4, characterized in that: There are 5-10 mounting portions (200) evenly distributed on the side of the connecting disk (100); the cross-sectional shape of the first mounting hole (110) is configured as a rotation-stopping shape so that the connecting disk (100) does not rotate axially after being installed, and the inner wall of the first mounting hole (110) is configured to be inclined.

6. The spoke disc according to claim 5, characterized in that: An extension section (230) protrudes from the upper end of the mounting portion (200) into the connecting plate (100), and the extension section (230) covers the end portion (510); an edge of the first mounting hole (110) protrudes upward to form a fixing portion (111), and an inner wall of the fixing portion (111) is inclined toward the center of the first mounting hole (110).

7. The spoke disc according to claim 6, characterized in that: It also includes a cover plate (400), the extension section (230) encloses a groove, the cover plate (400) is embedded in the groove, and a third mounting hole is opened in the middle of the cover plate (400), and the position of the third mounting hole corresponds to that of the first mounting hole (110).

8. The spoke disc according to claim 7, characterized in that: The connecting plate (100), the mounting portion (200) and the extension section (230) are all made of carbon fiber material; The connecting plate (100), the mounting portion (200) and the extension section (230) are integrally formed.

9. A spoke-hub connection structure, characterized in that: It comprises the spoke disc according to any one of claims 1 to 8, a hub shell body (600), and spokes (500), wherein the spoke disc is detachably mounted on the hub shell body (600), and one end of the spoke (500) is fixedly connected to the spoke disc; An end portion (510) is provided at one end of the spoke (500) close to the spoke disc, the cross section of the end portion (510) being U-shaped, and the end portion (510) is matched with the mounting groove (220).

10. The spoke-hub connection structure according to claim 9, characterized in that: The spokes (500) are straight-pull spokes or elbow spokes.

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