WO2023088478A1 - 一种内埋帽头式碳纤维辐条及其制造方法 - Google Patents

一种内埋帽头式碳纤维辐条及其制造方法 Download PDF

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Publication number
WO2023088478A1
WO2023088478A1 PCT/CN2022/133418 CN2022133418W WO2023088478A1 WO 2023088478 A1 WO2023088478 A1 WO 2023088478A1 CN 2022133418 W CN2022133418 W CN 2022133418W WO 2023088478 A1 WO2023088478 A1 WO 2023088478A1
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WIPO (PCT)
Prior art keywords
cap
spoke
carbon fiber
head
tooth
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PCT/CN2022/133418
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English (en)
French (fr)
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刘五瑞
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厦门碳瀛复合材料科技有限公司
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Publication of WO2023088478A1 publication Critical patent/WO2023088478A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/003—Spoked wheels; Spokes thereof specially adapted for bicycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/006—Spoked wheels; Spokes thereof specially adapted for light-weight wheels, e.g. of strollers or wheel-chairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/02—Wheels with wire or other tension spokes
    • B60B1/0261—Wheels with wire or other tension spokes characterised by spoke form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/02—Wheels with wire or other tension spokes
    • B60B1/04—Attaching spokes to rim or hub
    • B60B1/042—Attaching spokes to hub
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B1/00—Spoked wheels; Spokes thereof
    • B60B1/02—Wheels with wire or other tension spokes
    • B60B1/04—Attaching spokes to rim or hub
    • B60B1/043—Attaching spokes to rim
    • B60B1/044—Attaching spokes to rim by the use of spoke nipples

Definitions

  • the invention discloses an internally buried hat-head type carbon fiber spoke and a manufacturing method thereof, and belongs to the technical field of bicycle wheel spoke manufacturing according to the International Patent Classification (IPC).
  • IPC International Patent Classification
  • the spokes are the bridge that connects the rim to the hub.
  • one end of the spoke with a cap head is connected to the hub, and the other end with screw teeth is locked with the spoke cap and connected to the rim.
  • the spokes on the market are generally made of stainless steel, titanium, aluminum and other materials, and the weight is quite heavy, which is very unfavorable to the increasingly lightweight demand for products; there are also carbon fiber composite materials on the market, first making the main body of the spokes, and then glued on both ends of the spokes. Metal parts are connected to make it have the function of spokes, but in order to achieve a certain strength, the size of the metal parts bonded at both ends of the spokes made in this way is relatively large. In order to meet the needs of lighter weight, related technologies still need to be improved.
  • the present invention provides a carbon fiber spoke with a built-in cap head and a manufacturing method thereof.
  • the head end adopts a built-in structure to achieve high strength and light weight.
  • a carbon fiber spoke with a built-in cap head including a spoke body, a cap and a cap head, the spoke body is formed by carbon fiber, one end of the spoke body is connected to the cap, the part of the cap exposed on the spoke body is provided with screw teeth, and the spoke body The other end is provided with a cap head, and the cap head is embedded in the spoke body, and the tooth cap, the embedded cap head and the spoke body are arranged coaxially.
  • the spoke body includes a spoke inner core and carbon fiber prepreg, and the tooth cap and the cap head are provided with through installation holes, and the tooth cap and the cap head are respectively sleeved on both ends of the spoke inner core to form a coaxial structure.
  • the tooth cap, The cap head and the inner core of the spokes are wound or wrapped with carbon fiber prepreg and integrally formed.
  • the spoke inner core is cylindrical, and the outer diameter of the spoke inner core is adapted to the size of the installation hole of the tooth cap and the installation hole of the cap head.
  • the outer periphery of the portion of the tooth cap covered by the carbon fiber prepreg is provided with a fixedly socketed annular boss.
  • both the tooth cap and the cap head are metal parts
  • the cap head is a tapered cap head
  • the part of the tooth cap covered by carbon fiber prepreg is provided with a tapered structure. Prepreg coverage area and prevents too much concentration at the end of the prepreg layup end.
  • the present invention also provides a method for manufacturing a buried cap type carbon fiber spoke, comprising the following steps:
  • both the tooth cap and the cap head are metal products: the cap head is a conical cap head; the part of the tooth cap covered by carbon fiber prepreg is provided with a tapered structure, and the peripheral side of the tooth cap is processed into an annular boss In order to prevent the tooth cap and the carbon fiber prepreg from detaching during stretching, the side of the tooth cap placed outside the carbon fiber prepreg is processed with a card slot for easy installation.
  • the taper angle of the cap head is greater than that of the dental cap.
  • step S2 the inner core of the spoke is molded or pultruded into a cylinder.
  • step S3 the cap, the head and the inner core of the spoke need to be roughened, and the surface of the inner core of the spoke is coated with high-strength high-temperature-resistant bonding Glue, connected with the tooth cap and cap head for standby.
  • step S5 the temperature of the mold is controlled at 150-160 degrees Celsius, and the heating time is 20-30 minutes.
  • the cross-sectional shape of the spoke body is circular, oval or roughly diamond-shaped.
  • step S5 after the spoke is formed, the mold is opened and taken out, and then the thread is processed on the exposed part of the threaded cap, and the threaded part is assembled with the threaded cap.
  • the buried cap type carbon fiber spoke adopts a built-in structure at the cap end, so that the cap is completely placed in the package of carbon fiber prepreg, which solves the problem that the cap and carbon fiber are not wrapped in the prior art. It can solve the problem of detachment and improve the safety of riding or racing.
  • the cap head and the tooth cap are worn on the concentric axis, that is, the inner core of the spoke, so as to ensure that the cap head and the tooth cap are coaxially arranged, which is beneficial to improving the strength of the spoke.
  • Fig. 1 is an overall schematic diagram of an embodiment of the present invention.
  • Fig. 2 is a cross-sectional view of an embodiment of the present invention along the line A.
  • Fig. 3 is an enlarged view of an embodiment I of the present invention.
  • Fig. 4 is a structural schematic diagram of a hat head according to an embodiment of the present invention.
  • Fig. 5 is a schematic diagram of a tooth cap according to an embodiment of the present invention.
  • Fig. 6 is a schematic diagram of a nut according to an embodiment of the present invention.
  • a carbon fiber spoke with a buried cap head including a spoke body 1, a cap 2 and a cap 3, the spoke body 1 is formed by carbon fiber, and one end of the spoke body 1 is connected to the cap 2
  • the part of the tooth cap 2 exposed on the spoke body is provided with screw teeth, the other end of the spoke body 1 is provided with a cap head 3, and the cap head 3 is embedded in the spoke, the tooth cap 2, the cap head 3 and the spoke body 1 coaxial setup.
  • the spoke body 1 includes a spoke inner core 11 and a carbon fiber prepreg 12, the tooth cap 2 and the cap head 3 are provided with through mounting holes, the tooth cap 2 and the The caps 3 are respectively sleeved on both ends of the inner core of the spoke to form a coaxial structure, and the caps 2 , the caps 3 and the inner core of the spoke are wound or coated with carbon fiber prepreg and integrally formed.
  • the spoke inner core 11 is cylindrical, to facilitate production, and the outer diameter of the spoke inner core 11 is adapted to the size of the mounting hole of the tooth cap and the mounting hole of the cap head.
  • the outer diameter of the spoke inner core is less than 1.8mm.
  • the outer periphery of the part covered by the carbon fiber prepreg is provided with a fixedly sleeved annular boss, the purpose of which is to increase the covering area of the carbon fiber prepreg or carbon yarn and form a detachment-proof structure.
  • both the tooth cap 2 and the cap head 3 are metal parts, the cap head 3 is a conical cap head, and the part of the tooth cap 2 covered by carbon fiber prepreg is provided with a tapered structure, and the tooth cap 2 and the cap head 3
  • the tapered shape is designed to increase the coverage area with carbon fiber prepreg and prevent excessive concentration at the end of the prepreg stack.
  • the present invention also provides a method for manufacturing a buried cap type carbon fiber spoke, comprising the following steps:
  • step S1 prepare the tooth cap 2 and the cap head 3 at the two ends of the spoke, and the centers of the tooth cap 2 and the cap head 3 are axially through holes respectively; in step S1, the tooth cap 2 and the cap head 3 are metal products: the cap head wherein is Conical cap head; the part of the cap covered by carbon fiber prepreg is provided with a conical structure, and the peripheral side of the cap is processed into a ring-shaped boss to prevent the cap from detaching from the carbon fiber prepreg during stretching.
  • the cap 2 is placed The outer side of the carbon fiber prepreg is processed with a card slot 21 to facilitate installation; as shown in Figure 4 and Figure 5, the axial length of the cap head 3 is significantly shorter than the length of the tooth cap 2, and the taper angle of the cap head is greater than that of the tooth cap , the purpose of the embodiments of the present invention is to reduce the size of the cap head under the condition of the protection strength of the embedded cap head;
  • step S2 prepare the inner core of the spoke, which is made of carbon fiber material, and the inner core of the spoke is adapted to the axial through hole of the cap and the cap head; in step S2, the inner core of the spoke is molded or pultruded into a cylinder;
  • step S5 Put the wound semi-finished product into the forming mold for heating and forming; in step S5, the temperature of the mold is controlled at 150-160 degrees Celsius, and the heating time is 20-30 minutes.
  • the cross-sectional shape of the spoke body is circular or elliptical shape or roughly rhombus; after the spokes are formed, the mold is opened and taken out, and then the exposed part of the thread cap is processed with thread, and the nut 4 is matched with the assembly, as shown in Figure 6.
  • step S3 the tooth cap 2, the cap head 3 and the inner core of the spoke need to be roughened, and the surface of the spoke inner core is coated with high-strength high-temperature resistant bonding glue, and the tooth cap 2, the cap head 3 Connection spare.
  • a carbon fiber spoke with a built-in cap head including a spoke core made of carbon fiber, a tooth cap 2 that can be matched with a wheel rim, and a small embedded cap 3 and used to wrap or wrap the spoke core carbon fiber prepreg with metal caps and embedded caps; both the caps and the embedded caps are provided with through mounting holes, and the mounting holes of the toothed caps and the mounting holes of the embedded caps are respectively fixed and socketed in two On the fixed joint, it is adapted to the size of the outer diameter of the inner core of the spoke body.
  • the inner core of the carbon fiber spoke is cylindrical, easy to produce and process, and its diameter is the same as that of the tooth cap and the mounting hole of the cap head.
  • the spoke inner core and the tapered part of the tooth cap are all coated or wound with carbon fiber prepreg, and the embedded cap head is completely wrapped by carbon fiber prepreg, that is, it is completely placed inside the yarn sheet, and then placed in the forming mold for heating Cured and shaped to form a one-piece carbon fiber spoke.
  • the present invention is a kind of buried crown type carbon fiber spoke, and the specific process is as follows:
  • the two ends of the spokes are made of metal parts hollowed out in the middle, namely the cap head 3 and the tooth cap 2.
  • the metal parts are made of high-strength metal materials such as stainless steel, aluminum alloy, titanium alloy, etc.
  • the hole diameter of the middle hollow is less than 2mm, and the tooth cap 2. With a ring-shaped boss, there is a straight slot on the tooth cap, which can be used as a fixation when the nut is tightened later to prevent twisting;
  • a carbon fiber core i.e. the spoke inner core 11
  • the diameter of which is adapted to the above-mentioned hollow aperture the carbon fiber core can be molded or pultruded;
  • metal parts and carbon fiber cores need to be roughened. Pass the carbon fiber core through the hole between the cap head and the tooth cap. The surface of the carbon fiber core is coated with high-strength high-temperature resistant bonding glue, and it is ready for use after connection.
  • the required spoke shape can be round/flat/elliptical/diamond-like cross-sectional shape according to the actual design requirements.
  • Figure 2 is A spoked oval shape.
  • Carbon fiber spoke of the present invention features as follows:
  • the exterior of the cap 3 connected to the hub is a carbon fiber structure, and the metal parts will not be exposed, which can further reduce the weight of the carbon spokes.
  • the size of the cap head and the tooth cap is very small, which is close to the metal spokes on the market.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Dental Prosthetics (AREA)

Abstract

本发明公开一种内埋帽头式碳纤维辐条及其制造方法，该辐条包括辐条本体、牙帽和帽头，辐条本体是由碳纤维成型，辐条本体一端连接牙帽，牙帽露在辐条本体的部分设有螺牙，辐条本体的另一端设有帽头，且帽头内埋于辐条本体内，所述的牙帽、内埋帽头及辐条本体同轴设置。本发明碳纤维辐条中，与花鼓相连的帽头外部为碳纤维结构，金属件不外露，能进一步减轻碳辐条的重量；与轮圈相连的牙帽仅螺牙外露，其它部分也被碳纤维包覆，提升牙帽端的抗扭性能；帽头和牙帽的尺寸非常小，接近市面上的金属辐条。

Description

一种内埋帽头式碳纤维辐条及其制造方法 技术领域
本发明公开一种内埋帽头式碳纤维辐条及其制造方法，按国际专利分类表(IPC)划分属于自行车车轮辐条制造技术领域。
背景技术
在自行车系统中，辐条是连接轮圈与花鼓的桥梁。在使用过程中，辐条一端带帽头连接在花鼓上，一端带螺牙与辐条帽锁固，连接在轮圈上。
目前市面上的辐条一般使用不锈钢、钛、铝等材质制作，重量相当重，非常不利于产品重量日益轻量化需求；市面上也有使用碳纤维复合材料成型，先制作辐条主体，再在辐条两端粘接金属件，使其具备辐条的功能，但这样制作的辐条为了达到一定的强度，两端粘接金属件尺寸较大，为了更轻量化需求，相关技术仍有待提高。
发明内容
针对现有技术的不足，本发明提供一种内埋帽头式碳纤维辐条及制作方法，通过帽头端采用内埋式结构，达到强度高、轻量化的效果。
为达到上述目的，本发明是通过以下技术方案实现的：
一种内埋帽头式碳纤维辐条，包括辐条本体、牙帽和帽头，辐条本体是由碳纤维成型，辐条本体一端连接牙帽，牙帽露在辐条本体的部分设有螺牙，辐条本体的另一端设有帽头，且帽头内埋于辐条本体内，所述的牙帽、内埋帽头及辐条本体同轴设置。
进一步，辐条本体包括辐条内芯和碳纤维预浸料，牙帽和帽头设有贯穿的安装孔，牙帽和帽头分别套接在辐条内芯两端形成同轴结构，所述牙帽、帽头 及辐条内芯外缠绕或包覆碳纤维预浸料并一体成型。
进一步，辐条内芯为圆柱状，辐条内芯的外径与牙帽的安装孔和帽头的安装孔大小适配。
进一步，牙帽被碳纤维预浸料包覆部分的外周设有固定套接的环形凸台。
进一步，牙帽和帽头均为金属件，帽头为锥形帽头，牙帽被碳纤维预浸料包覆部分设有锥形结构，牙帽和帽头的锥形设计用于提高与碳纤维预浸料包覆面积及防止预浸料叠层端部结束处过于集中。
本发明还提供一种内埋帽头式碳纤维辐条制造方法，包括如下步骤：
S1、制备辐条两头的牙帽和帽头，牙帽和帽头的中心分别轴向通孔；
S2、制备辐条内芯，是由碳纤维材料制成，辐条内芯与牙帽和帽头的轴向通孔适配；
S3、将牙帽和帽头套接在辐条内芯的两端，使牙帽和帽头同轴设置；
S4、用碳纤维预浸料缠绕包覆辐条内芯及牙帽和帽头形成半成品，其中帽头完全置于碳纤维预浸料内部，牙帽的一部分置于碳纤维预浸料外部；
S5、将缠绕好的半成品放到成型模具里加温成型。
步骤S1中，牙帽和帽头均为金属制品：其中的帽头为锥形帽头；牙帽被碳纤维预浸料包覆部分设有锥形结构，牙帽周侧加工成环状凸台以防止牙帽和碳纤维预浸料拉伸时脱离，牙帽置于碳纤维预浸料外部的侧面加工有卡槽以方便安装。
进一步，帽头的锥形角大于牙帽的锥形角。
步骤S2中，辐条内芯采用模具成型或拉挤成型为圆柱体，在步骤S3前，牙帽、帽头及辐条内芯需做粗化处理，辐条内芯表面涂覆高强度的耐高温接合胶，与牙帽、帽头连接备用。
步骤S5中，模具温度控制在150－160摄氏度，加温时长在20－30分钟，成型后辐条本体的截面形状为圆形或椭圆形或大体菱形。
步骤S5中，辐条成型后开模取出，然后在牙帽的裸露部分加工螺牙，并配合组配螺帽。
本发明内埋帽头式碳纤维辐条具有如下有益效果：
1、本发明内埋帽头式碳纤维辐条，其帽头端采用采用内埋式结构，使帽头完全置于碳纤维预浸料的包裹内，解决了现有技术中帽头与碳纤维没有包裹而能脱离的问题，提升骑行或竞赛的安全性。
2、本发明将帽头、牙帽穿设在同心轴即辐条内芯上，从而保证帽头、牙帽同轴设置，有利于提高辐条强度。
3、本发明一种碳纤维辐条及其制造方法，用胶合及碳纤维预进料包覆辐条内芯和金属帽头和牙帽的工艺，尤其是内埋帽头结构，使辐条本体与帽头形成整体，辐条强度增加的同时，减小帽头尺寸及重量，使自行车车轮更加轻量化。
附图说明
图1是本发明一实施例整体示意图。
图2是本发明一实施例A向剖视图。
图3是本发明一实施例I处放大图。
图4是本发明一实施例帽头结构示意图。
图5是本发明一实施例牙帽示意图。
图6是本发明一实施例螺帽示意图。
具体实施方式
下面结合附图对本发明作进一步说明：
实施例：请参阅图1至图6，一种内埋帽头式碳纤维辐条，包括辐条本体1、牙帽2和帽头3，辐条本体1是由碳纤维成型，辐条本体1一端连接牙帽2，牙帽2露在辐条本体的部分设有螺牙，辐条本体1的另一端设有帽头3，且帽头3内埋于辐条内，所述的牙帽2、帽头3及辐条本体1同轴设置。
本发明一实施例中，如图1、图4、图5，辐条本体1包括辐条内芯11和碳纤维预浸料12，牙帽2和帽头3设有贯穿的安装孔，牙帽2和帽头3分别套接在辐条内芯两端形成同轴结构，所述牙帽2、帽头3及辐条内芯外缠绕或包覆碳纤维预浸料并一体成型。辐条内芯11为圆柱状，以方便生产，辐条内芯11的外径与牙帽的安装孔和帽头的安装孔大小适配。为了适应轻量化和强度的要求，辐条内芯的外径直径小于1.8mm。在牙帽2被碳纤维预浸料包覆部分的外周设有固定套接的环形凸台，目的是增加碳纤维预浸料或碳纱包覆面积并形成防脱结构。本发明中，牙帽2和帽头3均为金属件，帽头3为锥形帽头，牙帽2被碳纤维预浸料包覆部分设有锥形结构，牙帽2和帽头3的锥形设计用于提高与碳纤维预浸料包覆面积及防止预浸料叠层端部结束处过于集中。
本发明还提供一种内埋帽头式碳纤维辐条制造方法，包括如下步骤：
S1、制备辐条两头的牙帽2和帽头3，牙帽2和帽头3的中心分别轴向通孔；步骤S1中，牙帽2和帽头3均为金属制品：其中的帽头为锥形帽头；牙帽被碳纤维预浸料包覆部分设有锥形结构，牙帽周侧加工成环状凸台以防止牙帽和碳纤维预浸料拉伸时脱离，牙帽2置于碳纤维预浸料外部的侧面加工有卡槽21以方便安装；如图4及图5，帽头3轴向长度明显短于牙帽2长度，帽头的锥形角大于牙帽的锥形角，本发明实施例的目的是内埋式帽头保护强度的条件下，减小帽头尺寸；
S2、制备辐条内芯，是由碳纤维材料制成，辐条内芯与牙帽和帽头的轴向 通孔适配；步骤S2中，辐条内芯采用模具成型或拉挤成型为圆柱体；
S3、将牙帽2和帽头3套接在辐条内芯的两端，使牙帽和帽头同轴设置；
S4、用碳纤维预浸料缠绕包覆辐条内芯及牙帽和帽头形成半成品，其中帽头完全置于碳纤维预浸料内部，牙帽的一部分置于碳纤维预浸料外部；
S5、将缠绕好的半成品放到成型模具里加温成型；步骤S5中，模具温度控制在150－160摄氏度，加温时长在20－30分钟，成型后辐条本体的截面形状为圆形或椭圆形或大体菱形；辐条成型后开模取出，然后在牙帽的裸露部分加工螺牙，并配合组配螺帽4，如图6所示。
本发明制造方法中，在步骤S3前，牙帽2、帽头3及辐条内芯需做粗化处理，辐条内芯表面涂覆高强度的耐高温接合胶，与牙帽2、帽头3连接备用。
一种内埋帽头式碳纤维辐条，包括一由碳纤维制成的辐条内芯、一能配合连接轮圈的牙帽2和一细小内埋的帽头3以及用来缠绕或包覆辐条内芯和金属牙帽和内埋帽头的碳纤维预浸料；牙帽和内埋帽头都设有贯穿的安装孔，该牙帽的安装孔和内埋帽头的安装孔分别固定套接在两固接头上，与辐条本体内芯外径大小适配。该碳纤维辐条内芯为圆柱状，易于生产加工，直径同牙帽和帽头安装孔的尺寸。该辐条内芯及牙帽的锥形部分全部都通过包覆或缠绕碳纤维预浸料，内埋帽头完全被碳纤维预浸包裹，即完全置于纱片内部，再置于成型模具中加温固化定型以形成一体成型的碳纤维辐条。
本发明一种内埋帽头式碳纤维辐条，具体工艺如下：
1.辐条的两头制作中间镂空的金属件即帽头3和牙帽2，金属件的材质为不锈钢、铝合金、钛合金等一些高强度的金属材质，中间镂空的孔径为小于2mm，牙帽2带有环形凸台,牙帽上有一直线卡槽，可在后面拧紧螺帽的时候作为固定的作用，防止扭转；
2.制备碳纤维芯(即辐条内芯11)，直径与上述镂空的孔径适应；该碳纤维芯可以用模具或拉挤成型；
3.使用前，金属件及碳纤维芯需做粗化处理，将碳纤维芯先从帽头和牙帽的孔中间穿过，碳纤维芯表面涂覆高强度的耐高温接合胶，连接后备用。
4.用0度或者带角度碳纤维预浸料缠绕/包覆碳纤维芯和金属件，从牙帽带斜度的地方渐层缠绕，直到设计需要的厚度，缠绕好待成型的产品；
5.将缠绕好的产品放到型模具上加温成型(155摄氏度25mins)，所需要的辐条造型依实际设计需求，可以是圆形/扁形/椭圆形/类似菱形等截面形状，图2是一种辐条椭圆造型。
6.成型后开模取出产品，需在牙帽的一端加工螺牙，完成后即为最终可用的产品，并配合组配的螺帽4，如图6所示。
本发明碳纤维辐条特点如下：
1.与花鼓相连的帽头3外部为碳纤维结构，金属件不会外露，能进一步减轻碳辐条的重量。
2.与轮圈相连的牙帽2仅螺牙外露，其它部分也被碳纤维包覆，提升牙帽端的抗扭性能。
3.帽头和牙帽的尺寸非常小，接近市面上金属辐条。
以上所记载，仅为利用本创作技术内容的实施例，任何熟悉本项技艺者运用本创作所做的修饰、变化，皆属本创作主张的专利范围，而不限于实施例所揭示者。

Claims (10)

  1. 一种内埋帽头式碳纤维辐条，其特征在于：包括辐条本体、牙帽和帽头，辐条本体是由碳纤维成型，辐条本体一端连接牙帽，牙帽露在辐条本体的部分设有螺牙，辐条本体的另一端设有帽头，且帽头内埋于辐条内，所述的牙帽、内埋帽头及辐条本体同轴设置。
  2. 根据权利要求1所述的一种内埋帽头式碳纤维辐条，其特征在于：辐条本体包括辐条内芯和碳纤维预浸料，牙帽和帽头设有贯穿的安装孔，牙帽和帽头分别套接在辐条内芯两端形成同轴结构，所述牙帽、帽头及辐条内芯外缠绕或包覆碳纤维预浸料并一体成型。
  3. 根据权利要求2所述的一种内埋帽头式碳纤维辐条，其特征在于：辐条内芯为圆柱状，辐条内芯的外径与牙帽的安装孔和帽头的安装孔大小适配。
  4. 根据权利要求1所述的一种内埋帽头式碳纤维辐条，其特征在于：牙帽被碳纤维预浸料包覆部分的外周设有固定套接的环形凸台。
  5. 根据权利要求1至3之一所述的一种内埋帽头式碳纤维辐条，其特征在于：牙帽和帽头均为金属件，帽头为锥形帽头，牙帽被碳纤维预浸料包覆部分设有锥形结构，牙帽和帽头的锥形设计用于提高与碳纤维预浸料包覆面积及防止预浸料叠层端部结束处过于集中。
  6. 一种内埋帽头式碳纤维辐条制造方法，其特征在于，包括如下步骤：
    S1、制备辐条两头的牙帽和帽头，牙帽和帽头的中心分别轴向通孔；
    S2、制备辐条内芯，是由碳纤维材料制成，辐条内芯与牙帽和帽头的轴向通孔适配；
    S3、将牙帽和帽头套接在辐条内芯的两端，使牙帽和帽头同轴设置；
    S4、用碳纤维预浸料缠绕包覆辐条内芯及牙帽和帽头形成半成品，其中帽头完全置于碳纤维预浸料内部，牙帽的一部分置于碳纤维预浸料外部；
    S5、将缠绕包覆好的半成品放到成型模具里加温成型。
  7. 根据权利要求6所述的一种内埋帽头式碳纤维辐条制造方法，其特征在于：步骤S1中，牙帽和帽头均为金属制品：其中的帽头为锥形帽头；牙帽被碳纤维预浸料包覆部分设有锥形结构，牙帽周侧加工成环状凸台以防止牙帽和碳纤维预浸料拉伸时脱离，牙帽置于碳纤维预浸料外部的侧面加工有卡槽以方便安装。
  8. 根据权利要求7所述的一种内埋帽头式碳纤维辐条制造方法，其特征在于：帽头的锥形角大于牙帽的锥形角。
  9. 根据权利要求6所述的一种内埋帽头式碳纤维辐条制造方法，其特征在于：步骤S2中，辐条内芯采用模具成型或拉挤成型为圆柱体，在步骤S3前，牙帽、帽头及辐条内芯需做粗化处理，辐条内芯表面涂覆高强度的耐高温接合胶，与牙帽、帽头连接备用。
  10. 根据权利要求6所述的一种内埋帽头式碳纤维辐条制造方法，其特征在于：步骤S5中，模具温度控制在150－160摄氏度，加温时长在20－30分钟，成型后辐条本体的截面形状为圆形或椭圆形或大体菱形；辐条成型后开模取出，然后在牙帽的裸露部分加工螺牙，并配合组配螺帽。
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