Bicycle rim with spoke hole base ring and its manufacturing method

Abstract

This invention discloses a bicycle rim with a spoke hole base ring and its manufacturing method. The rim comprises a rim body, a spoke hole base ring, spoke nuts, and spokes. The rim body has an annular closed chamber. The spoke hole base ring is disposed on the bottom wall of the rim body corresponding to the radially inner side of the closed chamber. The spoke hole base ring includes a ring band and multiple spoke hole bases disposed on the ring band. Spoke holes are formed on the spoke hole bases. The toothed end of the spoke passes through the spoke hole and is coaxially assembled with the spoke nut. The surface of the spoke hole base is perpendicular to the axis of the spoke, ensuring that the installation direction of the spoke nut is the same as the installation direction of the spoke. This prevents one side of the spoke from shifting and contacting the spoke nut, forming an angle and causing breakage. It also prevents the other side of the spoke from not contacting the spoke nut, causing loosening and reduced spoke tension. This design is more durable and reliable, improves user riding safety, and meets the requirements for lightweight rims.

Description

Technical Field

[0001] This invention relates to the field of bicycle wheel rim technology, specifically to a bicycle wheel rim with a spoke hole base ring and its manufacturing method. Prior Technology

[0002] Referring to Figures 1-3, current bicycle rims have spoke holes on the inner circumference of the rim body. The spoke tips pass through the spoke holes and are fitted with spoke nuts. The spoke nuts are installed in the same direction as the radial direction of the rim body, but the spokes are installed at multiple different angles, all different from the radial direction of the rim body. This causes the spoke nuts and their corresponding spokes to not be on the same axis. One side of the spoke is in contact with the spoke nut and squeezes to form an angle (as shown by the arrows in Figures 2 and 3). This is prone to breakage after prolonged use. The other side is not in contact and is prone to loosening, which reduces the spoke tension and requires frequent adjustments, which is troublesome. Moreover, if one spoke is loose, the stress on other spokes will increase, leading to a chain reaction that causes multiple spokes to loosen and be damaged, posing a high risk and affecting the user's safe riding. In addition, in order to prevent the rim body from being damaged under high tension, the rim body must be designed with a thicker wall at the spoke hole position, resulting in a thicker inner wall of the rim body, which is not lightweight. Summary of the Invention

[0003] The present invention aims to provide a bicycle wheel rim with a spoke hole base ring to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: a bicycle rim with a spoke hole base ring, comprising a rim body, a spoke hole base ring, spoke nuts, and spokes. An annular closed chamber is formed within the rim body. The spoke hole base ring is disposed on the bottom wall of the rim body corresponding to the radially inner side of the closed chamber. The spoke hole base ring includes a ring band and multiple spoke hole bases disposed on the ring band. Spoke holes are formed on the spoke hole bases. The toothed end of the spoke passes through the spoke hole and is coaxially assembled with the spoke nut. The surface of the spoke hole base is perpendicular to the axial direction of the spoke.

[0005] Preferably, the spoke hole base is disposed on the outer ring sidewall of the belt, and the spoke nut includes a cap and a bushing that are perpendicular to each other. The bottom surface of the cap is flush with and fits the surface of the spoke hole base. The toothed end of the spoke passes through the spoke hole and is coaxially assembled with the bushing of the spoke nut.

[0006] Preferably, the spoke hole base ring comprises multiple spoke hole base segments spliced ​​together end to end.

[0007] Preferably, there are six spoke hole base sections, with four spoke hole bases provided on each spoke hole base section, and the inclination angles of the spoke holes on the four spoke hole bases are different from each other.

[0008] Preferably, an upper connecting piece and a lower connecting piece are respectively provided at both ends of the spoke hole base section, and two adjacent spoke hole base sections are spliced ​​together by the upper connecting piece and the lower connecting piece.

[0009] Preferably, the transverse cross-sectional shape of the spoke hole base is circular, elliptical, square, trapezoidal, or triangular.

[0010] Preferably, the wheel rim body extends radially outward from the closed chamber and is provided with a tire position groove for accommodating the tire.

[0011] Preferably, the surface of the spoke hole base ring is covered with prepreg fiber cloth.

[0012] The present invention also provides a method for manufacturing a bicycle rim with a spoke hole base ring as described above, comprising the following steps:

[0013] S1. A spoke hole base ring with a spoke hole base is made using a special mold and carbon fiber material;

[0014] S2. During the pre-forming process, the spoke hole base ring is embedded in the bottom wall of the wheel rim body using carbon fiber material to form a complete wheel rim. The pre-formed semi-finished product is placed in the wheel rim forming mold, then placed in the forming equipment, the mold is closed, high-pressure gas is filled into the forming air bag, and the pressure is increased and heated to 150~160° to form and cure for no less than 30 minutes.

[0015] S3. Remove the formed wheel rim from the mold; trim the edges, remove the formed air bag, and inspect the flatness and roundness of the wheel rim;

[0016] S4. Machining spoke holes: Making spoke holes perpendicular to the surface of the spoke hole base;

[0017] S5. Pass the toothed end of the spoke through the spoke hole and assemble it coaxially with the spoke nut. Install the nut end of the spoke on the hub so that the installation direction of the spoke nut is the same as the installation direction of the spoke.

[0018] The present invention has the following beneficial effects:

[0019] This invention includes a wheel rim body, a spoke hole base ring, a spoke nut, and spokes. The wheel rim body has an annular closed chamber. The spoke hole base ring is disposed on the bottom wall of the wheel rim body corresponding to the radially inner side of the closed chamber. The spoke hole base ring includes a ring belt and multiple spoke hole bases disposed on the ring belt. Spoke holes are formed on the spoke hole bases. The toothed end of the spoke passes through the spoke hole and is coaxially assembled with the spoke nut. The toothed end of the spoke is mounted on the hub. The surface of the spoke hole base is perpendicular to the axis of the spoke, such that the installation direction of the spoke nut is perpendicular to the spoke axis. With the spokes installed in the same direction, this technical solution ensures that the spoke nut and its corresponding spoke are on the same axis. This prevents one side of the spoke from shifting and coming into contact with the spoke nut, causing pressure and potentially breaking. It also prevents the other side of the spoke from not contacting the spoke nut, which could lead to loosening and reduced spoke tension. This avoids unnecessary adjustments, making the wheel more convenient and durable. Furthermore, it prevents a loose spoke from causing increased stress on other spokes, thus eliminating potential risks and improving riding safety. Additionally, by adding a spoke hole base ring, the rim can bear greater loads and the inner bottom wall can be made thinner, reducing the overall weight of the rim and meeting the requirements for lightweight rims. Simple Explanation of the Diagram

[0020] Figure 1 is a structural schematic diagram of a bicycle rim in the prior art;

[0021] Figure 2 is a schematic diagram of the spokes forming an angle in a cross-sectional view of a prior art bicycle rim;

[0022] Figure 3 is a schematic diagram of the spokes forming an angle in a longitudinal section view of a prior art bicycle rim;

[0023] Figure 4 is a structural schematic diagram of a bicycle wheel rim according to an embodiment of the present invention;

[0024] Figure 5 is a partially enlarged schematic diagram of the bicycle rim in a cross-sectional view according to an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of a bicycle wheel rim according to an embodiment of the present invention from a longitudinal section perspective;

[0026] Figure 7 is a schematic diagram of the assembly of a spoke according to an embodiment of the present invention;

[0027] Figure 8 is a partially enlarged schematic diagram of Figure 7;

[0028] Figure 9 is a schematic diagram of the assembly of another spoke according to an embodiment of the present invention;

[0029] Figure 10 is a partially enlarged schematic diagram of Figure 9;

[0030] Figure 11 is a schematic diagram of the spoke hole base ring according to an embodiment of the present invention;

[0031] Figure 12 is a schematic diagram of the spoke hole base section according to an embodiment of the present invention;

[0032] Figure 13 is a half-sectional view of the spoke hole base section according to an embodiment of the present invention. Implementation

[0033] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. The elements in the drawings are not drawn to scale, and similar element symbols are generally used to represent similar elements.

[0034] Referring to Figures 4-13, as an embodiment of the present invention, a bicycle rim with a spoke hole base ring is provided, including a rim body 1, a spoke hole base ring 2, spoke nuts, and spokes 4. The rim body 1 is a carbon fiber structure with an annular closed chamber 11 inside. The spoke hole base ring 2 is disposed on the bottom wall 12 of the rim body 1 corresponding to the radial inner side of the closed chamber 11. The spoke hole base ring 2 includes a ring belt 21 and a plurality of spoke hole bases 22 disposed on the ring belt 21. Spoke holes are formed on the spoke hole bases 22. The toothed end of the spoke 4 passes through the spoke hole and is coaxially assembled with the spoke nut 3. The nut end of the spoke is mounted on the hub 5. The surface of the spoke hole base 22 is perpendicular to the axial direction of the spoke 4. The spoke nut 3 is installed in the same direction as the spoke 4, meaning the spoke nut 3 and spoke 4 are coaxially positioned. This technical solution ensures that the spoke nut 3 and its corresponding spoke 4 are on the same axis, preventing one side of the spoke 4 from shifting and coming into contact with the spoke nut 3, forming an angle and potentially breaking. It also prevents the other side of the spoke 4 from not contacting the spoke nut 3, causing loosening and a decrease in spoke tension. This avoids unnecessary adjustments, making the wheel more durable and reliable. Furthermore, it prevents one spoke 4 from becoming loose, increasing the stress on other spokes and causing a chain reaction that could lead to multiple spokes becoming loose or damaged, eliminating potential risks and improving user riding safety. Additionally, by adding the spoke hole base ring 2, the rim's load-bearing capacity is increased, and the inner bottom wall 12 of the rim can be made thinner, reducing the overall weight of the rim and meeting the requirements for lightweight rims.

[0035] In this embodiment, the spoke hole base 22 is disposed on the outer ring sidewall of the belt 21. The spoke nut 3 includes a cap and a bushing that are perpendicular to each other. The bottom surface of the cap is flush with and fits the surface of the spoke hole base 22. The toothed end of the spoke 4 passes through the spoke hole and is coaxially assembled with the bushing of the spoke nut 3, ensuring the installation stability of the spoke nut 3 at the spoke hole. Furthermore, by setting the surface of the spoke hole base 22 to be perpendicular to the axial direction of the spoke 4, it adapts to the existing structure of the spoke nut 3, eliminating the need to modify the spoke nut 3 and saving development costs.

[0036] In this embodiment, the spoke hole base ring 2 includes six spoke hole base segments spliced ​​end to end. Each spoke hole base segment is provided with four spoke hole bases 22, and the inclination angles of the spoke holes on the four spoke hole bases 22 are different from each other. The above arrangement can save the development and manufacturing cost of the corresponding mold. Of course, the number of spoke hole base segments, spoke hole bases 22, or spoke holes can be adapted according to the actual number of spokes. For example, the spoke hole base ring can be four spoke hole base segments spliced ​​end to end, which is not limited here.

[0037] In this embodiment, an upper connecting piece 23 and a lower connecting piece 24 are respectively provided at both ends of the spoke hole base section. Two adjacent spoke hole base sections are spliced ​​together by the upper connecting piece 23 and the lower connecting piece 24, thereby ensuring that the thickness of the ring 21 at the splice is basically the same as the thickness at other positions, and the connection stability is better.

[0038] In this embodiment, the transverse cross-sectional shape of the spoke hole base 22 is circular, elliptical, square, trapezoidal or triangular.

[0039] In this embodiment, the wheel rim body 1 is provided with a tire position slot 13 for accommodating the tire, extending radially outward from the closed cavity 11.

[0040] In this embodiment, the surface of the spoke hole base ring is wrapped with prepreg fiber cloth, which further improves the curing stability of the spoke hole base ring in the wheel rim body 1.

[0041] The present invention also provides a method for manufacturing a bicycle rim with a spoke hole base ring 2 as described in the above embodiments, comprising the following steps:

[0042] S1. A spoke hole base ring 2 with a spoke hole base 22 is made using a special mold and carbon fiber material;

[0043] S2. During the pre-forming process, the spoke hole base ring 2 is embedded in the bottom wall of the wheel rim body using carbon fiber material to form a complete wheel rim. The pre-formed semi-finished product is placed in the wheel rim forming mold, then placed in the forming equipment, the mold is closed, high-pressure gas is filled into the forming air bag, and the pressure is increased and heated to 150~160° to form and cure for no less than 30 minutes.

[0044] S3. Remove the formed wheel rim from the mold; trim the edges, remove the formed air bag, and inspect the flatness and roundness of the wheel rim;

[0045] S4. Machining spoke holes: Making spoke holes perpendicular to the surface of the spoke hole base 22;

[0046] S5. Pass the toothed end of the spoke 4 through the spoke hole and assemble it coaxially with the spoke nut 3. The head end of the spoke 4 is installed on the hub 5, so that the installation direction of the spoke nut 3 is the same as the installation direction of the spoke 4.

[0047] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the invention without departing from the spirit and scope of the invention as defined in the appended claims fall within the protection scope of the invention.

[0048] 1: Wheel body 11: Closed chamber 12:Bottom wall 13: Tire position slot 2: Spoke hole base ring 21: Circumference 22: Spoke hole base 23: Upper connecting piece 24: Lower layer connecting piece 3: Spoke nut 4: Spokes 5: Flower Drum

Claims

1. A bicycle rim with a spoke hole base ring, wherein: The wheel includes a rim body, a spoke hole base ring, spoke nuts, and spokes. The rim body has an annular closed chamber. The spoke hole base ring is located on the bottom wall of the rim body corresponding to the radially inner side of the closed chamber. The spoke hole base ring includes a ring band and multiple spoke hole bases located on the ring band. Each spoke hole base has a spoke hole. The toothed end of the spoke passes through the spoke hole and is coaxially assembled with the spoke nut. The surface of the spoke hole base is perpendicular to the axis of the spoke. The spoke hole base is located on the outer side wall of the ring band. The spoke nut includes a cap and a bushing that are perpendicular to each other. The bottom surface of the cap is flush with and fits against the surface of the spoke hole base. The toothed end of the spoke passes through the spoke hole and is coaxially assembled with the bushing of the spoke nut.

2. The bicycle rim with a spoke hole base ring according to claim 1, wherein: The spoke hole base ring consists of multiple spoke hole base segments that are spliced ​​together end to end.

3. The bicycle rim with a spoke hole base ring according to claim 2, wherein: The spoke hole base section consists of six segments, with four spoke hole bases provided on each segment, and the inclination angles of the spoke holes on the four spoke hole bases are different from each other.

4. The bicycle rim with a spoke hole base ring according to claim 2, wherein: The spoke hole base section has an upper connecting piece and a lower connecting piece extending from both ends, and two adjacent spoke hole base sections are joined together by the upper connecting piece and the lower connecting piece.

5. The bicycle rim with a spoke hole base ring according to claim 1, wherein: The transverse cross-sectional shape of the spoke hole base can be circular, elliptical, square, trapezoidal, or triangular.

6. The bicycle rim with a spoke hole base ring according to claim 1, wherein: The wheel rim body extends radially outward from the closed chamber and has a tire position slot for accommodating the tire.

7. The bicycle rim with a spoke hole base ring according to claim 1, wherein: The surface of the spoke hole base ring is covered with prepreg fiber cloth.

8. A method for manufacturing a bicycle rim with a spoke hole base ring as described in any one of claims 1 to 7, wherein: The process includes the following steps: S1. A spoke hole base ring with a spoke hole base is made using a special mold and carbon fiber material; S2. During the pre-forming process, the spoke hole base ring is embedded in the bottom wall of the wheel rim body using carbon fiber material to form a complete wheel rim. The pre-formed semi-finished product is placed in the wheel rim forming mold, then placed in the forming equipment, the mold is closed, high-pressure gas is injected into the forming air bag, and the rim is pressurized and heated to 150~160℃ for at least 30 minutes to cure. S3. The formed wheel rim is removed from the mold; the edges are trimmed, the forming air bag is removed, and the flatness and roundness of the wheel rim are inspected. S4. Spoke holes are machined: spoke holes perpendicular to the surface of the spoke hole base are made. S5. The spoke nut end is passed through the spoke hole and coaxially assembled with the spoke nut. The spoke nut end is installed on the hub, so that the installation direction of the spoke nut is the same as the installation direction of the spoke.

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