Carbon fiber spoke

Abstract

The utility model provides a carbon fiber spoke. The carbon fiber spoke comprises a fixing part, a fixing ring and a plurality of spokes, wherein the fixing ring and the spokes are integrally formed by adopting a carbon fiber material; a metal ring is arranged in the fixing ring, a plurality of threaded holes are annularly formed in the bottom wall of the fixing ring at intervals, one end of each threaded hole extends to the top wall of the metal ring and the top wall of the fixing ring, and the carbon fiber spoke is locked to the rim when bolts are assembled in the threaded holes. According to the carbon fiber spoke, the spokes and the fixing ring are integrally formed and are all made of the carbon fiber materials, the physical performance of the carbon fiber materials of the carbon fiber spoke is 10 times or above superior to that of steel and aluminum, so that the fatigue resistance and the impact resistance of the carbon fiber spoke are both superior to those of metal materials, and the weight of the carbon fiber spoke is less than one fourth of that of steel materials. After the bolts are assembled in the threaded holes in the fixing ring, the bolts are directly locked on the carbon fiber spoke, compared with a traditional locking mode that penetrating type bolts and nuts are adopted, the number of the nuts is reduced, the weight is reduced, meanwhile, the product attractiveness is improved, and the durability of the threads is improved due to the arrangement of the embedded metal pieces.

Description

Technical Field

[0001] The present application belongs to the technical field of automobile accessories, and more specifically, relates to a carbon fiber wheel spoke. Background Art

[0002] Existing wheel hubs are mostly steel and aluminum wheel hubs, which have simple manufacturing processes and relatively low costs, but their physical properties are average and they are heavy. At the same time, their spokes and rims are mostly locked with through bolts and nuts, which increases the weight and exposes the nuts, affecting the overall appearance of the product. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a carbon fiber spoke with better physical properties, lighter weight and more beautiful appearance.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a carbon fiber spoke, including: a fixing part for connecting to an axle, and a fixing ring and a plurality of spokes integrally formed of carbon fiber material, wherein the fixing part is a metal part or a metal alloy part; one end of the spoke is connected to the fixing ring, and the other ends of each of the spokes together form a mounting seat, and the fixing part is fixed to the mounting seat; a metal ring is built into the fixing ring, and a plurality of threaded holes are circumferentially spaced on the bottom wall of the fixing ring, and one end of the threaded hole extends to the metal ring and the top wall of the fixing ring, so that the carbon fiber spoke is locked to the rim when the threaded hole is assembled with bolts.

[0005] In one embodiment, the fixing ring is provided with a plurality of threaded holes which are evenly spaced in an annular direction.

[0006] In one embodiment, the spokes are hollow structures.

[0007] In one embodiment, one end of the spoke is connected to the top wall of the fixing ring, and the spoke is bent toward a side away from the bottom wall of the fixing ring.

[0008] In one embodiment, the inner side wall of one end of the spoke extends to the inner side wall of the fixing ring, and the outer side wall of one end of the spoke extends to the outer side wall of the fixing ring.

[0009] In one embodiment, the mounting seat has a mounting cavity adapted to accommodate the fixing member, the mounting cavity has openings at two axial ends, and the fixing member is fixed to the mounting cavity.

[0010] In one embodiment, the fixing member is adhesively fixed to the mounting seat.

[0011] In one embodiment, an axle mounting hole matching the axle is provided in the middle of the fixing member, a plurality of connecting parts are provided on the outer peripheral side ring of the fixing member, the connecting parts are provided with mounting holes, and a notch adapted to the connecting parts is provided on the top wall of the mounting seat.

[0012] In one embodiment, a hollow positioning portion is protruding from the bottom surface of the connecting portion, the hole wall of the mounting hole extends to the positioning portion, and a positioning hole adapted to the positioning portion is opened on the bottom wall of the mounting seat at a position corresponding to the positioning portion.

[0013] In one embodiment, the fixing member is a metal member.

[0014] The beneficial effect of the carbon fiber spokes provided by the present application is that compared with the prior art, the carbon fiber spokes of the present application, the spokes and the fixing rings are integrally formed and are both made of carbon fiber, the physical properties of the carbon fiber spokes are improved, and the weight is greatly reduced, a metal ring is provided in the fixing ring, that is, when the spokes and the fixing ring are formed, a metal ring is built into a predetermined position in the mold cavity, and after forming, the threaded bottom holes are machined in the fixing ring, and the threaded holes are tapped to form threaded holes. After the threaded holes are assembled with bolts, the bolts are directly locked on the carbon fiber spokes, and then the carbon fiber spokes are locked to the rim. Compared with the traditional locking method of penetrating bolts and nuts, it reduces nuts and reduces weight, and also improves the aesthetics of the product. The setting of embedded metal parts also improves the durability of the screw threads. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 A three-dimensional diagram of a carbon fiber spoke provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 Exploded view of the carbon fiber spokes shown;

[0018] Figure 3 for Figure 1 A three-dimensional view of the carbon fiber spokes from another angle;

[0019] Figure 4 for Figure 1 Side view of the carbon fiber spoke shown;

[0020] Figure 5 For along Figure 4 Sectional view in the AA direction;

[0021] Figure 6 for Figure 5 The enlarged schematic diagram of the middle B part;

[0022] Figure 7 for Figure 2 A schematic diagram of the structure of the fixing parts in the carbon fiber spoke shown;

[0023] Figure 8 It is a schematic diagram of the structure when the mold is closed;

[0024] Fig. 9 This is a schematic diagram of the structure when the mold is demolded.

[0025] Among them, the reference numerals in the figure are:

[0026] 10-carbon fiber spokes; 20-fixing piece; 30-fixing ring; 40-spokes; 21-axle mounting hole; 22-connecting part; 220-mounting hole; 221-positioning part; 31-metal ring; 32-threaded hole; 42-mounting seat; 421-mounting cavity; 422-notch; 423-positioning hole; 50-mold; 51-upper mold; 52-lower mold. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] Traditional spokes and fixing rings are split structures, and bolts and nuts are often used to lock the two together. The nuts are exposed, affecting the overall appearance of the product, and the thread durability is poor.

[0032] Please also read Figures 1 to 3 , the carbon fiber spoke 10 provided in the embodiment of the present application is now described. The carbon fiber spoke 10 includes a fixing part 20, a fixing ring 30 and a spoke 40. The fixing part 20 is used to connect to the axle, and the fixing part 20 is a metal part or a metal alloy part. A metal ring 31 is built into the fixing ring 30, and the fixing ring 30 and the spoke 40 are integrally formed. The fixing ring 30 and the spoke 40 are both made of carbon fiber material. While ensuring the strength, the weight of the carbon fiber spoke 10 can also be reduced. The overall weight of the carbon fiber spoke 10 is small, so that the product can be lightweight. That is, a metal ring 31 is placed in advance at a predetermined position in the mold cavity, and carbon fiber prepreg is injected into the mold cavity. After molding, a ring-shaped fixing ring 30 is formed outside the metal ring 31, and the remaining carbon fiber prepreg forms the spoke 40.

[0033] The angles between two adjacent spokes 40 are equal. In this embodiment, there are five spokes 40, and there is no limit to the number of spokes 40. An axle mounting hole 21 matching the axle is provided in the middle of the fixing member 20, and a plurality of mounting holes 220 are also provided on the fixing member 20. The fixing ring 30 is coaxially arranged with the fixing member 20.

[0034] Combined with reference Figures 4 to 6 , one end of the spoke 40 is connected to the fixing ring 30, specifically, one end of the spoke 40 is connected to the top wall of the fixing ring 30, so that the end of the spoke 40 and the fixing ring 30 share a wall. The other end of each spoke 40 together surrounds a mounting seat 42, and the fixing member 20 is fixed to the mounting seat 42, and the mounting seat 42 is coaxially arranged with the fixing member 20. The bottom wall of the fixing ring 30 is provided with a plurality of threaded holes 32 at annular intervals, one end of the threaded hole 32 extends to the metal ring 31 and the top wall of the fixing ring 30, and a small section of a threaded blind hole is formed on the top wall of the fixing ring 30, that is, the threaded hole 32 does not penetrate the top wall of the fixing ring 30, so that when the threaded hole 32 is assembled with a bolt, the bolt passes through the rim and is connected to the fixing ring 30, and the bolt directly locks the carbon fiber spoke, thereby locking the carbon fiber spoke 10 with the rim. With this structure, the nut is omitted, that is, there is no nut exposed, which solves the problem of the overall aesthetics of the product.

[0035] Compared with the prior art, the carbon fiber spoke 10 provided in the present application has a spoke 40 and a fixing ring 30 that are integrally formed and are both made of carbon fiber. The weight of the carbon fiber spoke 10 is greatly reduced, and a metal ring 31 is provided in the fixing ring 30, that is, when the spoke 40 and the fixing ring 30 are formed, a metal ring 31 is built into a predetermined position of the mold cavity, and after forming, the threaded bottom hole is machined and tapped to form a threaded hole 32. After the threaded hole 32 is assembled with a bolt, the bolt is directly locked on the carbon fiber spoke 10, and then the carbon fiber spoke 10 is locked to the rim. Compared with the traditional locking method of using a penetrating bolt plus a nut, it reduces the nut, reduces the weight, and also improves the product aesthetics. The setting of the embedded metal part 31 also improves the durability of the thread.

[0036] See also Figure 3 and Figure 4 A plurality of threaded holes 32 are evenly spaced in the circumferential direction on the fixing ring 30. At least two threaded holes 32 are formed on the bottom wall of the fixing ring 30 corresponding to the connection area with the spokes 40. That is, at least two threaded holes 32 are formed on the bottom wall of the fixing ring 30 corresponding to the connection area between the fixing ring 30 and the spokes 40, so that bolts with matching density can be assembled on the fixing ring 30.

[0037] See also Figure 5 , Figure 6 The spoke 40 is set to a hollow structure, so that the spoke 40 and the fixing ring 30 are integrally formed with each other and have a smaller weight, so that the product can be further lightweight.

[0038] One end of the spoke 40 is connected to the top wall of the fixing ring 30, and the spoke 40 is bent toward the side away from the bottom wall of the fixing ring 30. The end of the spoke 40 close to the fixing ring 30 is more bent, and the end of the spoke 40 away from the fixing ring 30 is less bent.

[0039] The inner wall of one end of the spoke 40 extends to the inner wall of the fixing ring 30, and the connection between the inner walls of the two is smooth or rounded; the outer wall of one end of the spoke 40 extends to the outer wall of the fixing ring 30, and the connection between the outer walls of the two is smooth or rounded.

[0040] See also Figures 1 to 3 , the other end of each spoke 40 together forms a mounting seat 42, the mounting seat 42 has a mounting cavity 421 adapted to accommodate the fixing member 20, and the fixing member 20 is fixed in the mounting cavity 421. That is to say, during the process of integrally forming the spoke 40 and the fixing ring 30, one end of each spoke 40 away from the fixing ring 30 forms a mounting seat 42 for the fixing member 20 to be installed, and the inside of the spoke 40 is also hollow, and the internal chamber of the spoke 40 is connected to the mounting cavity 421; the fixing member 20 is fixed in the mounting cavity 421 of the mounting seat 42. The mounting seat 42 has two axial ends open to allow the axle to pass through and be inserted and installed on the fixing member 20.

[0041] See also Figure 1 and Figure 2 The fixing member 20 is fixed to the mounting seat 42 by bonding. When installing, glue can be applied on the fixing member 20 or the mounting seat 42, and the fixing member 20 is aligned and placed in the mounting seat 42. After the glue solidifies, the fixing member 20 is fixed to the mounting seat 42, that is, fixed together with the spoke 40. The center hole of the carbon fiber spoke 10 is designed as a split metal part or metal alloy part, which is fixed to the spoke 40 by bonding. Because the size specifications of the center hole of the carbon fiber spoke 10, such as PCD (pitch circle diameter) and BC (center hole diameter), are diverse, this split type can be used to achieve independent processing, which can meet the needs of different specifications and sizes, is flexible and convenient, and also reduces the difficulty of the manufacturing process.

[0042] The fixing member 20 is made of metal. Specifically, the fixing member 20 can be, but is not limited to, made of aluminum or aluminum alloy, or can be made of other metal materials with lower density and lower cost.

[0043] See also Figures 1 to 3 and Figure 7 The middle part of the fixing member 20 is provided with an axle mounting hole 21 matching the axle, and the outer peripheral side of the fixing member 20 is surrounded by a plurality of connecting parts 22, and the connecting parts 22 are provided with mounting holes 220. Bolts are passed through the mounting holes 220 to assemble the fixing member 20 and the axle. The top wall of the mounting seat 42 is provided with a notch 422 adapted to the connecting part 22. The axis of each mounting hole 220 is arranged parallel to the axis of the middle axle mounting hole 21, and a plurality of connecting parts 22 are arranged around the outer peripheral side of the fixing member 20, and a recess is formed between two adjacent connecting parts 22. The notch 422 of the top wall of the mounting seat 42 matches the contour of the outer peripheral surface of the connecting part 22, so as to form a matching positioning structure, which facilitates the accurate and smooth placement of the fixing member 20 on the mounting seat 42.

[0044] A hollow positioning portion 221 is convexly provided on the bottom surface of the connecting portion 22, the hole wall of the mounting hole 220 extends to the positioning portion 221, and a positioning hole 423 adapted to the positioning portion 221 is opened at the bottom wall of the mounting seat 42 at a position corresponding to the positioning portion 221. In other words, the positioning portion 221 is a hollow structure, the mounting hole 220 and the positioning portion 221 are coaxially arranged, the hole wall of the positioning portion 221 is connected to the hole wall of the mounting hole 220 as a whole, and the outer diameter of the positioning portion 221 is adapted to the aperture of the positioning hole 423 of the mounting seat 42, so that the positioning portion 221 and the positioning hole 423 also form a positioning structure, further improving the convenience of the alignment installation operation of the fixing member 20. The bottom surface of the positioning portion 221 is flush or approximately flush with the bottom surface of the outer side of the mounting seat 42, that is, the positioning portion 221 does not extend out of the mounting seat 42.

[0045] See also Figure 2 , Figure 6 , Figure 8 and Fig. 9 The following describes the manufacturing process of the carbon fiber spoke 10 by taking the fixing member 20 as a metal member as an example:

[0046] 1. The carbon fiber prepreg is laid into the mold cavity of the mold 50, and during the laying process, the intermediate metal ring 31 is placed in an appropriate position in the mold cavity.

[0047] 2. The mold cavity is subjected to vacuum treatment; specifically, the mold 50 can be placed in a vacuum bag film to complete the vacuum treatment.

[0048] 3. The vacuum-treated mold 50 is placed in a vacuum autoclave to solidify the carbon fiber prepreg in the mold cavity.

[0049] 4. After a certain period of high temperature and high pressure, the resin curing reaction is completed, and the upper mold 51 and the lower mold 52 of the mold 50 are separated, and the mold is removed to take out the rough product. In other words, there is a demoulding resin on the inner surface of the mold 50, which is conducive to the smooth removal of the rough product after demoulding.

[0050] 5. The formed rough product is machined to form a notch 422 and a positioning hole 423 on the mounting seat 42 of the spoke 40, and then the surface of the rough product is cleaned to obtain a carbon fiber composite material product.

[0051] 6. Adhere and fix the metal fixing member 20 to the mounting seat 42 at the center of the spoke 40 .

[0052] 7. Machine the screw holes and tap the bottom wall of the fixing ring 30.

[0053] 8. Then, the surface of the carbon fiber spoke 10 is subjected to oil spraying treatment to form a protective layer on the surface of the carbon fiber spoke 10.

[0054] The spokes 40 and the fixing ring 30 in the carbon fiber spoke 10 are integrally formed in a mold 50 using carbon fiber prepreg, and the bottom hole is machined on the fixing ring 30 afterwards, and then tapped to form an integral body. Bolts can be used for direct locking, reducing nuts, while reducing weight and improving product aesthetics. Split metal parts are used and subsequently bonded for a second time. Split metal parts can be processed independently to meet the needs of different specifications and sizes, bringing flexibility and convenience to production and manufacturing, and can effectively reduce the difficulty of the manufacturing process; the setting of the metal ring 31 can not only improve the locking stability, but also improve the durability of the screw thread.

[0055] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the inventive concept and protection scope of the present application shall be included in the protection scope of the present application.

Claims

1. A carbon fiber spoke, characterized in that: include: A fixing part for connecting with an axle, and a fixing ring and a plurality of spokes integrally formed of carbon fiber material, wherein the fixing part is a metal part or a metal alloy part; one end of the spoke is connected to the fixing ring, and the other ends of the spokes together form a mounting seat, and the fixing part is fixed to the mounting seat; a metal ring is built into the fixing ring, and a plurality of threaded holes are circumferentially spaced on the bottom wall of the fixing ring, and one end of the threaded hole extends to the metal ring and the top wall of the fixing ring, so that the carbon fiber spokes can be locked to the rim when the threaded holes are assembled with bolts.

2. The carbon fiber spoke according to claim 1, characterized in that: The fixing ring is provided with a plurality of threaded holes which are evenly spaced in an annular direction.

3. The carbon fiber spoke according to claim 1, characterized in that: The spokes are hollow structures.

4. The carbon fiber spoke according to claim 1, characterized in that: One end of the spoke is connected to the top wall of the fixing ring, and the spoke is bent toward a side away from the bottom wall of the fixing ring.

5. The carbon fiber spoke according to claim 1, characterized in that: The inner side wall of one end of the spoke extends to the inner side wall of the fixing ring, and the outer side wall of one end of the spoke extends to the outer side wall of the fixing ring.

6. The carbon fiber spoke according to claim 1, characterized in that: The mounting seat has a mounting cavity adapted to accommodate the fixing member, the mounting cavity has openings at two axial ends respectively, and the fixing member is fixed to the mounting cavity.

7. The carbon fiber spoke according to claim 6, characterized in that: The fixing member is bonded and fixed to the mounting seat.

8. The carbon fiber spoke according to claim 6, characterized in that: An axle mounting hole matching the axle is provided in the middle of the fixing piece, a plurality of connecting parts are provided around the outer circumference of the fixing piece, the connecting parts are provided with mounting holes, and a notch matching the connecting parts is provided on the top wall of the mounting seat.

9. The carbon fiber spoke according to claim 8, characterized in that: A hollow positioning portion is convexly provided on the bottom surface of the connecting portion, the hole wall of the mounting hole extends to the positioning portion, and a positioning hole adapted to the positioning portion is opened at the bottom wall of the mounting seat at a position corresponding to the positioning portion.

10. The carbon fiber spoke according to any one of claims 1 to 9, characterized in that: The fixing piece is a metal piece.

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