Bicycle rim with spoke hole base ring and manufacturing method thereof

Abstract

The invention discloses a bicycle rim with a spoke hole base ring and a manufacturing method thereof.The bicycle rim comprises a rim body and the spoke hole base ring, an annular closed cavity is formed in the rim body, and the spoke hole base ring is arranged on the bottom wall, corresponding to the radial inner side of the closed cavity, of the rim body; the spoke hole base ring comprises a ring belt and a plurality of spoke hole bases arranged on the ring belt, spoke holes are formed in the spoke hole bases, the tooth cap ends of the spokes penetrate through the spoke holes to be coaxially assembled with the spoke nuts, the installation direction of the spoke nuts is the same as that of the spokes, namely, the spoke nuts and the spokes are coaxially arranged, and the spoke holes are formed in the spoke hole bases. According to the wheel rim, one side of each spoke can be prevented from deviating to be in contact with the spoke nut to form a break angle so as to be broken, meanwhile, the other side of each spoke is prevented from being not in contact with the spoke nut to be loosened, and the tension of the spokes is reduced, the wheel rim is more worry-saving and durable, riding safety of a user is improved, and the requirement for light weight of the wheel rim is met.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle rims, and in particular to a bicycle rim with a spoke hole base ring and a manufacturing method thereof. Background Art

[0002] At present, spoke holes are provided on the circumferential inner wall of the rim body of a bicycle rim, and the cap ends of the spokes pass through the spoke holes and are installed and matched with the spoke nuts, wherein the installation direction of the spoke nut is consistent with the radial direction of the rim body, but the installation direction of the spokes has multiple different angles and is different from the radial direction of the rim body, resulting in that the spoke nut and its corresponding spoke cannot be located on the same axis, and the offset side of the spoke contacts and squeezes with the spoke nut to form an angle, which is easy to break after long-term use, and the other side is easy to loosen if it does not contact, and the tension of the spoke decreases, so that frequent adjustment is required, which is troublesome. Moreover, if one spoke is loose, the force on other spokes will increase, and the chain reaction will cause multiple spokes to loosen and be damaged, posing a high risk of hidden dangers, affecting the safe riding of users. In addition, in order to ensure that the rim body is not damaged under high tension, the rim body must be designed with a thicker wall thickness at the spoke hole position, which results in a larger thickness of the inner wall of the rim body and is not light enough. 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-mentioned purpose, the technical solution of the present invention is: a bicycle rim with a spoke hole base ring, comprising a rim body and a spoke hole base ring, an annular closed chamber is opened in the rim body, the spoke hole base ring is arranged on the bottom wall of the radial inner side of the rim body corresponding to the closed chamber, the spoke hole base ring comprises an annular band and a plurality of spoke hole bases arranged on the annular band, and spoke holes are opened on the spoke hole bases for the threaded cap ends of the spokes to pass through for coaxial assembly with the spoke nuts.

[0005] Preferably, it also includes a spoke nut and spokes, the spoke hole base is arranged on the outer ring side wall of the ring band, and the surface of the spoke hole base is perpendicular to the axial direction of the spoke hole thereon, the spoke nut includes a cap head and a sleeve that are perpendicular to each other, the bottom surface of the cap head is flush with the surface of the spoke hole base, and the cap end of the spoke passes through the spoke hole and is coaxially assembled with the sleeve of the spoke nut.

[0006] Preferably, the spoke hole base ring comprises a plurality of spoke hole base segments which are sequentially connected end to end.

[0007] Preferably, there are six spoke hole base segments, each spoke hole base segment is provided with four spoke hole bases, and the spoke holes on the four spoke hole bases have different inclination angles.

[0008] Preferably, an upper connecting piece and a lower connecting piece are respectively extended from both ends of the spoke hole base segment, and two adjacent spoke hole base segments are spliced ​​together by the upper connecting piece and the lower connecting piece.

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

[0010] Preferably, a tire position hole groove for accommodating a tire is extended radially outwardly of the rim body corresponding to the closed chamber.

[0011] The present invention also provides a method for manufacturing any of the above-mentioned bicycle rims with spoke hole base rings, comprising the following steps:

[0012] S1. A spoke hole base ring with a spoke hole base is manufactured by using a special mold and carbon fiber material;

[0013] S2. The spoke hole base ring is embedded in the bottom wall of the rim body with carbon fiber material during the preforming process to form a complete rim. The preformed semi-finished product is placed in a rim forming mold, and then placed in a forming device, the mold is closed, and high-pressure gas is filled into the forming air bag, and the air bag is pressurized and heated to 150-160° for forming and curing for not less than 30 minutes;

[0014] S3, taking the formed wheel rim out of the mold; trimming, taking out the formed air bag, and inspecting the flatness and roundness of the wheel rim;

[0015] S4, processing spoke holes: opening spoke holes perpendicular to the spoke hole base;

[0016] S5. Pass the threaded cap end of the spoke through the spoke hole and assemble it coaxially with the spoke nut. Install the cap end of the spoke on the hub so that the installation direction of the spoke nut is the same as that of the spoke.

[0017] The present invention has the following beneficial effects:

[0018] The present invention comprises a wheel rim body and a spoke hole base ring, wherein an annular closed chamber is provided in the wheel rim body, the spoke hole base ring is arranged on the bottom wall of the radial inner side of the wheel rim body corresponding to the closed chamber, the spoke hole base ring comprises an annular belt and a plurality of spoke hole bases arranged on the annular belt, spoke holes are provided on the spoke hole bases for passing the threaded cap ends of the spokes through for coaxial assembly with the spoke nuts, the cap heads of the spokes are mounted on the hub, so that the mounting direction of the spoke nuts is the same as that of the spokes, that is, the spoke nuts are coaxially arranged with the spokes, This technical solution enables the spoke nut and its corresponding spoke to be located on the same axis, which can prevent one side of the spoke from being offset and contacting with the spoke nut to form an angle, thereby preventing it from breaking, and at the same time preventing the other side of the spoke from being loosened due to not contacting the spoke nut, resulting in a decrease in spoke tension, thereby avoiding unnecessary adjustments, making it more worry-free and durable, and also preventing one spoke from loosening, causing the stress on other spokes to increase, and a chain reaction causing multiple spokes to loosen and be damaged, eliminating risks and improving the riding safety of users. In addition, by adding a spoke hole base ring, the rim can bear more force, and the inner bottom wall of the rim can be made thinner, thereby reducing the overall weight of the rim and meeting the need for lightweight rims. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a stereogram of an embodiment of the present invention;

[0020] Figure 2 is a front view of an embodiment of the present invention;

[0021] Figure 3 is a cross-sectional view of an embodiment of the present invention;

[0022] Figure 4 It is a longitudinal section view and a partially enlarged schematic view of an embodiment of the present invention;

[0023] Figure 5 is an overall schematic diagram of a spoke hole base ring according to an embodiment of the present invention;

[0024] Figure 6 is a top perspective view of a spoke hole base segment of an embodiment of the present invention;

[0025] Figure 7 is a bottom perspective view of a spoke hole base segment of an embodiment of the present invention;

[0026] Figure 8 is a front view of a spoke hole base segment according to an embodiment of the present invention;

[0027] The accompanying drawings are marked with: 1 rim body, 11 closed chamber, 12 bottom wall, 13 tire position hole groove, 2 spoke hole base ring, 21 ring belt, 22 spoke hole base, 23 upper connecting plate, 24 lower connecting plate, 3 spoke nut, 4 spokes. DETAILED DESCRIPTION

[0028] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] See also Figure 1-8 As shown, as an embodiment of the present invention, a bicycle wheel rim with a spoke hole base ring is provided, comprising a wheel rim body 1 and a spoke hole base ring 2. The wheel rim body 1 is a carbon fiber structure, and an annular closed chamber 11 is provided therein. The spoke hole base ring 2 is arranged on a bottom wall 12 on the radial inner side of the wheel rim body 1 corresponding to the closed chamber 11. The spoke hole base ring 2 comprises an annular band 21 and a plurality of spoke hole bases 22 arranged on the annular band 21. Spoke holes are provided on the spoke hole bases 22 for passing the threaded cap end of the spoke through to be coaxially assembled with the spoke nut 3. The cap end of the spoke is installed on the hub. The installation direction of the spoke nut 3 is the same as that of the spoke. The installation direction of the spokes 4 is the same, that is, the spoke nut 3 is coaxially arranged with the spoke 4. The above technical solution makes the spoke nut 3 and its corresponding spoke 4 located on the same axis, which can prevent one side of the spoke 4 from deviating and contacting with the spoke nut 3 to form an angle, thereby preventing it from breaking. At the same time, it can prevent the other side of the spoke 4 from not contacting the spoke nut 3 and becoming loose, resulting in a decrease in the tension of the spoke 4, thereby avoiding unnecessary adjustments, making it more worry-free and durable. At the same time, it can also prevent one spoke 4 from loosening, resulting in a greater force on other spokes 4, and a chain reaction causing multiple spokes 4 to loosen and be damaged, eliminating risks and improving the riding safety of users. In addition, by adding a spoke hole base ring 2, the bearing capacity of the wheel rim is increased, and the inner bottom wall 12 of the wheel rim can be made thinner, thereby reducing the overall weight of the wheel rim and meeting the demand for lightweight wheel rims.

[0030] The present embodiment also includes a spoke nut 3 and spokes. The spoke hole base 22 is arranged on the outer ring side wall of the ring band 21, and the surface of the spoke hole base 22 is perpendicular to the axial direction of the spoke hole thereon. The spoke nut 3 includes a cap head and a sleeve that are perpendicular to each other. The bottom surface of the cap head is flush with the surface of the spoke hole base 22. The cap end of the spoke 4 passes through the spoke hole and is coaxially assembled with the sleeve of the spoke nut 3 to ensure the installation stability of the spoke nut 3 at the spoke hole. By setting the surface of the spoke hole base 22 to be perpendicular to the axial direction of the spoke hole thereon, the structure of the existing spoke nut 3 is adapted, and there is no need to improve the spoke nut 3, thereby saving development costs.

[0031] In this embodiment, the spoke hole base ring 2 includes six spoke hole base segments spliced ​​end to end, and each spoke hole base segment is provided with four spoke hole bases 22, and the spoke holes on the four spoke hole bases 22 have different inclination angles, and the above arrangement can save the development and production costs 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, such as the spoke hole base ring can be four spoke hole base segments spliced ​​end to end, which is not limited here.

[0032] In this embodiment, an upper connecting piece 23 and a lower connecting piece 24 are respectively extended from both ends of the spoke hole base section, and the 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 belt 21 at the splicing point is basically consistent with the thickness at other positions, and the connection stability is better.

[0033] In this embodiment, the cross-sectional shape of the spoke hole base 22 is circular, elliptical, square, trapezoidal or triangular.

[0034] In this embodiment, a tire position hole groove 13 for accommodating a tire is provided extending from the radial outer side of the rim body 1 corresponding to the closed chamber 11 .

[0035] The present invention also provides a method for manufacturing the bicycle rim with the spoke hole base ring 2 described in the above embodiment, comprising the following steps:

[0036] S1, making a spoke hole base ring 2 with a spoke hole base 22 by using a special mold and carbon fiber material;

[0037] S2, the spoke hole base ring 2 is embedded in the bottom wall of the rim body with carbon fiber material during the preforming process to form a complete rim, the preformed semi-finished product is placed in a rim forming mold, and then placed in a forming device, the mold is closed, and high-pressure gas is filled into the forming air bag, and the pressure is heated to 150-160° for molding and curing for not less than 30 minutes;

[0038] S3, taking the formed wheel rim out of the mold; trimming, taking out the formed air bag, and inspecting the flatness and roundness of the wheel rim;

[0039] S4, machining spoke holes: opening spoke holes perpendicular to the surface of the spoke hole base 22;

[0040] S5. Pass the threaded cap end of the spoke 4 through the spoke hole and assemble it coaxially with the spoke nut 3. Install the cap end of the spoke 4 on the hub so that the installation direction of the spoke nut 3 is the same as that of the spoke 4.

[0041] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. A bicycle wheel rim having a spoke hole base ring, characterized in that: It includes a rim body and a spoke hole base ring. An annular closed chamber is opened in the rim body. The spoke hole base ring is arranged on the bottom wall of the radial inner side of the rim body corresponding to the closed chamber. The spoke hole base ring includes an annular belt and a plurality of spoke hole bases arranged on the annular belt. Spoke holes are opened on the spoke hole bases for the threaded cap ends of the spokes to pass through for coaxial assembly with the spoke nuts.

2. The bicycle rim with spoke hole base ring according to claim 1, characterized in that: It also includes a spoke nut and spokes, the spoke hole base is arranged on the outer ring side wall of the ring band, and the surface of the spoke hole base is perpendicular to the axial direction of the spoke hole thereon, the spoke nut includes a cap head and a sleeve that are perpendicular to each other, the bottom surface of the cap head is flush with the surface of the spoke hole base, and the threaded cap end of the spoke passes through the spoke hole and is coaxially assembled with the sleeve of the spoke nut.

3. The bicycle rim with spoke hole base ring according to claim 1, characterized in that: The spoke hole base ring comprises a plurality of spoke hole base segments which are sequentially spliced ​​end to end.

4. The bicycle rim with spoke hole base ring according to claim 3, characterized in that: There are six spoke hole base sections, each of which is provided with four spoke hole bases, and the spoke holes on the four spoke hole bases have different inclination angles.

5. The bicycle rim with spoke hole base ring according to claim 3, characterized in that: An upper connecting piece and a lower connecting piece are respectively extended from both ends of the spoke hole base section, and two adjacent spoke hole base sections are spliced ​​up and down by the upper connecting piece and the lower connecting piece.

6. The bicycle rim with spoke hole base ring according to claim 1, characterized in that: The cross-sectional shape of the spoke hole base is circular, elliptical, square, trapezoidal or triangular.

7. The bicycle rim with spoke hole base ring according to claim 1, characterized in that: A tire position hole groove for accommodating a tire is extended from the radial outer side of the rim body corresponding to the closed chamber.

8. A method for manufacturing a bicycle rim having a spoke hole base ring as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1. A spoke hole base ring with a spoke hole base is manufactured by using a special mold and carbon fiber material; S2. The spoke hole base ring is embedded in the bottom wall of the rim body with carbon fiber material during the preforming process to form a complete rim. The preformed semi-finished product is placed in a rim forming mold, and then placed in a forming device, the mold is closed, and high-pressure gas is filled into the forming air bag, and the air bag is pressurized and heated to 150-160° for forming and curing for not less than 30 minutes; S3, taking the formed wheel rim out of the mold; trimming, taking out the formed air bag, and inspecting the flatness and roundness of the wheel rim; S4, processing spoke holes: opening spoke holes perpendicular to the spoke hole base; S5. Pass the threaded cap end of the spoke through the spoke hole and assemble it coaxially with the spoke nut. Install the cap end of the spoke on the hub so that the installation direction of the spoke nut is the same as that of the spoke.

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