TWI675760B - Carbon fiber spoke and manufacturing method thereof - Google Patents

Abstract

The invention provides a carbon fiber spoke and a manufacturing method thereof. The carbon fiber spoke includes a spoke body, a tooth cap, and a head; both ends of the spoke body are fixed with a fixed joint, and an outer peripheral surface of the fixed joint has a first taper section and a first turning section arranged inside and outside. , The outer diameter of the first turning section is not greater than the maximum outer diameter of the first taper section; the tooth cap and the head are provided with a through mounting hole, and the hole wall of the mounting hole has a second turning section and a relatively second turning section The second taper section whose inner diameter gradually increases from near to far, the second turning section of the mounting hole is sleeved on the spoke body and the second taper section is sleeved on the solid joint. It has the following advantages: it can solve the problem that the carbon fiber spoke test tooth cap is pulled out, and can avoid the tooth cap and the cap head being broken and damaged due to excessive tensile force.

Description

Carbon fiber spoke and manufacturing method thereof

The present invention relates to vehicle spokes; more specifically, it relates to a carbon fiber spoke and a method for manufacturing the same.

One end of the vehicle spoke is connected to the rim, and the other end is connected to the hub. Traditional automotive spokes are generally made of stainless steel, with one end bent to match the hook to the rim, and the other end bent to match the hook to the hub. Made of stainless steel, heavy weight, high cost and low production efficiency.

In response to the above-mentioned shortcomings, some people have proposed solutions: such as CN205273028U, a carbon fiber spoke, including a spoke body, one end of the spoke body is connected to a first accessory capable of mating with the rim, and the other end is connected to a second accessory capable of being mated with a hub. The spoke body is made of carbon fiber. The connection between the end of the spoke body and the accessory is bonded. During use, the hub and the rim can generate tensile forces on the accessory, making the accessory easily pulled away from the spoke body, resulting in separation between the two, short life, and Manufacturing is inconvenient and the manufacturing cost is high.

Another example is CN103448465A, a spoke fixing piece for a carbon fiber rim of a bicycle, which includes a fixing portion and an abutting portion, the fixing portion is formed to extend axially along a virtual axis, and the abutting portion is formed at one end of the fixing portion and uses the The virtual shaft is formed by the shaft center extending radially. The spoke fixing member is provided with a positioning hole. The position hole is sleeved on the spoke of the bicycle, and the abutting part abuts the carbon fiber rim of the bicycle. When the spoke transmits torque to drive the carbon fiber rim, the spoke fixing member can fix the spoke so that the spoke cannot move relative to the carbon fiber rim. The spoke structure for the vehicle is extremely complicated, inconvenient to manufacture, inconvenient to assemble, and high in manufacturing cost.

The problem to be solved by the present invention is to adopt a carbon fiber spoke and a manufacturing method thereof, which improve the problems of heavy weight, high cost, and low production efficiency of traditional automobile spokes made of stainless steel.

In order to solve the above problems, the present invention discloses a carbon fiber spoke, which includes a spoke body made of carbon fiber, a tooth cap capable of cooperating with a rim, and a cap head capable of cooperating with a hub; both ends of the spoke body are fixed. A solid joint is provided, and the outer peripheral surface of the solid joint has an inner small outer large first taper section and a first swivel section, and an outer diameter of the first swivel section is not greater than a maximum outer diameter of the first taper section; The tooth cap and the head are provided with a through mounting hole, and the hole wall of the mounting hole has a second turning section and a second taper section gradually increasing in diameter from near to far with respect to the second turning section. The second rotation section is sleeved on the spoke body and the second taper section is sleeved on the solid joint.

In one embodiment, the second taper section is adapted to the first taper section of the solid joint.

In an embodiment, the minimum outer diameter of the first taper section is greater than the outer diameter of the spoke body and a first step surface is formed on the solid joint through the difference in outer diameter; the minimum inner diameter of the second taper section is greater than the inner diameter of the second turning section, and The mounting hole is formed with a second step surface by the difference in outer diameter, and the first step surface and the second step surface abut against each other.

In an embodiment, the first turning section includes a first cylinder Segment, the outer diameter of the first cylindrical segment is not greater than the maximum outer diameter of the first tapered segment.

In one embodiment, the first turning section includes a third taper section which is large inside and small outside.

In an embodiment, the first slewing section includes a first cylindrical section, an outer diameter of the first cylindrical section is smaller than a maximum outer diameter of the first tapered section, and a connection is formed between the first tapered section and the first cylindrical section. The third taper segment.

In one embodiment, both ends of the spoke body are covered and cured to form a fixed part fixedly sheathed at the end of the spoke body. The fixed part is processed into a solid joint by a blanking process.

In one embodiment, the mounting hole of the tooth cap, the mounting hole of the cap head, and the two solid joints are respectively tightly fitted to form a fixed socket.

The invention also discloses a method for manufacturing a carbon fiber spoke, which includes the following steps: processing a spoke body made of carbon fiber, a tooth cap capable of cooperating with a rim, and a cap capable of cooperating with a hub, the tooth cap Both the cap and the head are provided with a through mounting hole, and the hole wall of the mounting hole has a second turning section and a second taper section that is gradually larger in diameter from near to far relative to the second turning section; step 2, the tooth cap and the head The end of the spoke body is sleeved on the spoke body; in step 3, a fixed joint is fixed on both ends of the spoke body, and the outer peripheral surface of the fixed joint has an inner small outer large first taper section and a A first swivel segment, the outer diameter of the first swivel segment is not greater than the maximum outer diameter of the first taper segment; and step 4, moving the cap and the cap to make the cap and cap secure The second rotating section of the mounting hole is suitable for being connected to the spoke body and the second taper section is respectively sleeved on the two solid joints to fix the spoke body, the tooth cap and the head together.

In an embodiment, the minimum outer diameter of the first taper section is greater than the outer diameter of the spoke body and a first step surface is formed on the solid joint through the difference in outer diameter; the minimum inner diameter of the second taper section is greater than the inner diameter of the second turning section, and The mounting hole is formed with a second step surface by the difference in outer diameter, and the first step surface and the second step surface abut against each other.

During the use of the invention, the forces exerted by the rim and hub on the tooth cap and the head are pull forces, the main characteristics are as follows: 1. The pull force causes the second taper section to have an outward force relative to the first taper section. The force makes the tightness between the tooth cap and the solid joint, the cap head and the solid joint tighter, and the stronger the connection, the separation of the two can be avoided; 2. The outer part of the mounting hole also cooperates with the first The turning section, and the outer diameter of the first turning section is not greater than the first taper section, so the outer part will rebound partially to prevent the tooth cap and the head from being broken and damaged due to excessive tension. Third, the spokes are light in weight and strong in strength. Good, improve the competitiveness of the product; convenient assembly, can reduce manufacturing costs; 3. The first step surface and the second step surface are abutted together, and the tooth cap and the head are broken and damaged due to excessive tension, and It also strengthens the strength; 4. Both ends of the spoke body are covered with yarn and cured to form a fixed part fixedly sheathed at the end of the spoke body. The fixed part is processed into a solid joint by a blanking process, and the connection strength is high. Low processing cost; 5. The mounting hole, the mounting hole of the cap head and the two solid joints are tightly matched with the socket to form a fixed socket, which facilitates assembly and reduces assembly costs.

The method for manufacturing a carbon fiber spoke includes: processing a spoke body, a tooth cap, and a cap head; then covering the tooth cap and the cap head from the end of the spoke body to the spoke body; and fixing the two ends of the spoke body. Solid joint; then move the teeth Caps and caps; therefore, through the manufacturing method of the present invention, the carbon fiber spokes can have the mounting holes of the tooth caps and the mounting holes of the caps fixed on the two solid joints, which are convenient for assembly and have high connection strength. .

Next, the present invention is further described with reference to the drawings and specific embodiments, so that those skilled in the art can more easily understand the present invention and implement it.

10‧‧‧ spoke body

20‧‧‧Tooth Cap

21‧‧‧Thread Section

22‧‧‧ non-circular segment

23‧‧‧First turning body segment

30‧‧‧ hat

31‧‧‧Fourth taper segment

32‧‧‧Hanging section

33‧‧‧Second swing body segment

40‧‧‧circle

41‧‧‧ Nut

50‧‧‧ Flower Drum

51‧‧‧Mounting slot

60‧‧‧Solid joint

61‧‧‧First taper segment

62‧‧‧first step surface

63‧‧‧ third taper segment

64‧‧‧First cylindrical section

65‧‧‧first turn

70‧‧‧Mounting hole

71‧‧‧Second taper section

72‧‧‧Second step surface

73‧‧‧second turn

Fig. 1 is one of the installation schematic diagrams of the spokes of the present invention; Fig. 2 is the second installation schematic diagram of the spokes of the present invention; Fig. 3 is a schematic sectional view of the tooth caps of the present invention; Figure 5 is a schematic cross-sectional view of the head of the present invention; Figure 6 is a schematic view of the structure of the spoke body of the present invention; Figure 7 is a schematic view of the structure of the tooth cap and the head of the present invention placed on the spoke body; Figure 8 is a view of the present invention 9 is a schematic cross-sectional view of a spoke of the present invention; FIG. 10 is one of the partially enlarged schematic diagrams of FIG. 9; and FIG. 11 is a second partially enlarged schematic diagram of FIG. 9.

Please refer to FIGS. 1 to 5 and FIGS. 9 to 11. A carbon fiber spoke includes a spoke body 10, a tooth cap 20 capable of cooperating with the rim 40 and a cap head 30 capable of cooperating with the hub 50; the spoke body 10 is made of carbon fiber, and the tooth cap 20 and the head 30 are made of stainless steel. The spoke body 10 is round A column structure, and both ends of the spoke body 10 are fixed with a fixed joint 60; the tooth cap 20 and the head 30 are provided with through-holes 70 for mounting.

The outer peripheral surface of the solid joint 60 has a first taper section 61 and a first turning section 65 arranged inside and outside. The smallest outer diameter of the first taper section 61 is larger than the outer diameter of the cylindrical structure of the spoke body 10 and passes through. The difference in outer diameter causes a first step surface 62 to be formed on the solid joint 60. The outer diameter of the first turning section 65 is not greater than the maximum outer diameter of the first taper section 61. The first step surfaces 62 of the two solid joints 60 are arranged facing each other. . Wherein: the first turning section 65 of the solid joint 60 includes a first cylindrical section 64, the outer diameter of the first cylindrical section 64 is smaller than the maximum outer diameter of the first taper section 61, the first taper section 61 and the first cylinder A third taper segment 63 is connected between the segments 64; the included angle between the first taper segment 61's turning line and the central axis is 0.5-5 degrees, such as 1 degree; both ends of the spoke body 10 are covered with yarn and It is cured to form a fixed part fixedly sheathed at the end of the spoke body 10, and the fixed part is processed into a fixed joint 60 by a blanking processing method.

The hole wall of the mounting hole 70 has a second slewing section 73 and a second taper section 71 that gradually increases in diameter from near to far from the second slewing section 73. The second slewing section 73 is a second cylindrical section. The smallest inner diameter of the taper section 71 is larger than the inner diameter of the second cylindrical section and the mounting hole 70 is formed with a second stepped surface 72 through a difference in outer diameter; wherein: the second turning section 73 is adapted to the cylindrical structure of the spoke body 10, and the second The taper section 71 is adapted to the solid joint 60. The adaptation is such that the taper angle of the first taper section 61 and the taper angle of the second taper section 71 are equal, or the taper angle of the second taper section 71 is slightly smaller than the taper angle of the first taper section 61.

The second turning section 73 of the tooth cap 20 and the mounting hole 70 of the head 30 is sleeved on the spoke body 10 and the second taper section 71 is sleeved on the fixed joint 60. On the first taper section 61, the first stepped surface 62 and the second stepped surface 72 abut against each other. The mounting hole 70 of the tooth cap 20, the mounting hole 70 of the head 30, and the two fixed joints 60 are tightly fitted and sleeved respectively. To form a fixed F socket. The inner diameter of the second slewing section 73 is not smaller than the cylindrical section of the spoke body. According to requirements, it is better to make it slightly larger so that the two fit loosely.

During use, the forces exerted by the rim 40 and the hub 50 on the tooth cap 20 and the head 30 are tensile forces. First, the pulling force causes the second taper segment 71 to have an outward force relative to the first taper segment 61. This force makes the tightness between the tooth cap and the solid joint, the cap head and the solid joint tighter, and the stronger the connection, the separation between the two can be avoided. Second, because the first step surface 62 and the second The step surfaces 72 abut against each other, which prevents the tooth cap 20 and the head 30 from being broken or damaged due to excessive tension. Third, the outer portion of the mounting hole 70 also cooperates with the first turning section 65, and the first turning section 65 is outside. The diameter is not larger than the first taper section 61, so the outer part will partially rebound. This can also prevent the tooth cap 20 and the head 30 from being broken and damaged due to excessive tension. Fourth, this structure can accurately produce different lengths. Carbon fiber spokes.

Please refer to FIG. 1 to FIG. 4, the outer peripheral wall of the tooth cap 20 has at least a threaded section 21 and a non-circular section 22. If the non-circular section 22 is provided with a plurality of gaps arranged in a circular array on a cylindrical surface; There may also be a first slewing body segment 23 between the threaded segment 21 and the non-circular segment 22; the end of the threaded segment 21 may be chamfered; during installation, the threaded segment and the nut 41 on the rim 40 are screwed together to achieve The mating connection described above.

Please refer to FIG. 1, FIG. 2 and FIG. 5. The outer peripheral wall of the cap 30 has a fourth taper section 31 and a hooking section 32. The width of the hooking section 32 is larger than the fourth The diameter of the taper section 31, and the width of the hooking section 32 is, for example, the outer diameter of the hooking section 32; according to need, the outer peripheral wall also has a second turning body section 33 connecting the fourth taper section 31 and the hooking section 32. During installation, the above-mentioned mating connection is achieved by being hooked on the hooking groove 51 of the hub 50 through the hooking section 32.

At the same time, the invention also discloses a method for manufacturing a carbon fiber spoke, comprising:

Step 1. Pulverize the carbon fiber carbon strip to grind the spoke body 10 of FIG. 6 and process the tooth cap 20 and the head 30 shown in FIG. 3 to FIG. 5 above. The carbon fiber can be significantly improved by pultrusion and other processes. Production efficiency of spokes.

Step 2. Referring to FIG. 7, the tooth cap 20 and the head 30 are sleeved on the spoke body 10 from the ends of the spoke body 10;

Step 3, please refer to FIG. 8. The end of the spoke body 10 is covered with yarn and cured to form a fixed part fixedly covered at the end of the spoke body 10. The fixed part is processed into a fixed joint 60 by a blanking method. , The cutting process such as grinding; and

Step 4, please refer to FIG. 10, move the tooth cap 20 and the head 30 so that the second turning section of the mounting hole of the tooth cap and the head is suitable for being connected to the spoke body and the second taper section is respectively sleeved on the two A fixed joint to fix the spoke body, the tooth cap and the head together.

According to this, the main features of the present invention are: 1. In the process of use, the forces acting on the tooth cap and the head of the rim and hub respectively are tensile forces, and the main characteristics are: 1. The tensile force makes the second taper section opposite The first taper section has an outward force, which forces the tighter the tightness between the tooth cap and the solid joint, and between the cap head and the solid joint, and the stronger the connection is, the separation of the two can be avoided; 2 .Mounting hole The outer part also cooperates with the first slewing section, and the outer diameter of the first slewing section is not greater than the first taper section, so the outer part will rebound partially to avoid the tooth cap and the head from being broken or damaged due to excessive tension; Third, the spokes are light in weight and good in strength, which improves the competitiveness of the product; convenient assembly, which can reduce manufacturing costs; 3. the first step surface and the second step surface are abutted together, and the tooth cap and the The cap head is broken, damaged, and also strengthens the strength; 4. Both ends of the spoke body are covered with yarn and cured to form a fixed part fixedly sheathed at the end of the spoke body. The solid joint has high connection strength and low processing cost. 5. The mounting hole of the tooth cap, the mounting hole of the cap head and the two solid joints are closely fitted to form a fixed socket, which facilitates assembly and reduces assembly costs. The manufacturing method of the carbon fiber spoke can make the carbon fiber spoke have the characteristics that the mounting hole of the tooth cap and the mounting hole of the cap head are respectively fixed and sleeved on the two solid joints, which is convenient for assembly and has high connection strength.

In summary, it only describes the implementation or examples of the technical means adopted by the present invention to solve the problem, and is not intended to limit the scope of patent implementation of the present invention. That is, all changes and modifications that are consistent with the meaning of the scope of the patent application of the present invention or made according to the scope of the patent application of the present invention are covered by the scope of the patent of the present invention.

Claims (10)

A carbon fiber spoke includes a spoke body made of carbon fiber, a tooth cap capable of cooperating with a connected rim, and a cap head capable of cooperating with a hub; the characteristic is that both ends of the spoke body are fixed with fixed joints, The outer peripheral surface of the solid joint has a first taper section and a first swivel section arranged inside and outside. The outer diameter of the first swivel section is not greater than the maximum outer diameter of the first taper section. The tooth cap and cap The heads are provided with a through-hole for installation, the hole wall of the installation hole has a second slewing section and a second taper section that gradually increases in diameter from near to far relative to the second slewing section, and the second slewing section of the mounting hole is socketed The spoke body and the second taper section are sleeved on the solid joint. The carbon fiber spoke according to item 1 of the scope of patent application, wherein the second taper section is adapted to the first taper section of the solid joint. The carbon fiber spoke according to item 1 of the scope of patent application, wherein the minimum outer diameter of the first taper section is larger than the outer diameter of the spoke body and a first step surface is formed on the solid joint through the difference in outer diameter; The diameter is larger than the inner diameter of the second turning section, and the mounting hole is formed with a second step surface through a difference in outer diameter, and the first step surface and the second step surface abut against each other. The carbon fiber spoke according to item 1 of the scope of patent application, wherein the first turning section includes a first cylindrical section, and an outer diameter of the first cylindrical section is not greater than a maximum outer diameter of the first taper section. The carbon fiber spoke according to item 1 of the scope of patent application, wherein the first turning section includes a third taper section which is large inside and small outside. The carbon fiber spoke according to item 1 of the scope of patent application, wherein the first turning section includes a first cylindrical section, the outer diameter of the first cylindrical section is smaller than the maximum outer diameter of the first taper section, and the first taper section A third taper section is connected to the first cylindrical section. The carbon fiber spoke according to item 1 of the scope of patent application, wherein both ends of the spoke body are covered with yarn and cured to form a fixed part fixedly sleeved on the end of the spoke body, and processed and fixed by a blanking method. Part into a solid joint. The carbon fiber spoke according to any one of the scope of claims 1 to 7, wherein the mounting hole of the tooth cap, the mounting hole of the cap head and the two solid joints are tightly fitted to form a fixed socket. A method for manufacturing a carbon fiber spoke includes the following steps: processing a spoke body made of carbon fiber, a tooth cap capable of cooperating with a rim and a cap capable of cooperating with a hub, the tooth cap and the cap Both are provided with penetrating mounting holes. The hole wall of the mounting hole has a second turning section and a second taper section that has a gradually increasing inner diameter from near to far relative to the second turning section. Step 2. The tooth cap and the cap head are from the spoke body. The end is sleeved on the spoke body; in step 3, a fixed joint is fixed on both ends of the spoke body, and the outer peripheral surface of the fixed joint has an inner small outer large first taper section and a first rotation. Section, the outer diameter of the first turning section is not greater than the maximum outer diameter of the first taper section; and step 4, move the cap and the head so that the second turning section of the mounting hole of the cap and the head is suitable The spoke body is connected to the spoke body and the second taper section is respectively sleeved on two solid joints to fix the spoke body, the tooth cap and the cap head together. The method for manufacturing a carbon fiber spoke according to item 9 of the scope of patent application, wherein the minimum outer diameter of the first taper section is larger than the outer diameter of the spoke body and a first stepped surface is formed on the solid joint by the outer diameter difference; the second taper The minimum inner diameter of the segment is larger than the inner diameter of the second turning segment, and the mounting hole is formed with a second step surface through the difference in outer diameter, and the first step surface and the second step surface abut against each other.