JP2588086B2 - Method for manufacturing fiber-reinforced synthetic resin swing arm for motorcycle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a swing arm made of fiber-reinforced synthetic resin for a motorcycle.

[0002]

2. Description of the Related Art Conventionally, a swing arm for a motorcycle generally has a hollow structure manufactured by die casting using aluminum or an aluminum alloy.

[0003] In addition, motorcycle parts other than the swing arm, such as the inner tube of the front fork and the rim of the wheel, have been proposed to be formed of a synthetic resin reinforced with carbon fiber, glass fiber or the like.
The manufacturing method of these parts is described in, for example,
186 and Japanese Patent Publication No. 3-53121.

[0004]

A swing arm made of a metal such as an aluminum alloy is manufactured by die-casting a plurality of components such as an arm and a cross member, and then welding and connecting the components. Therefore, the number of parts is large, it takes time and effort to manufacture,
There is a problem that the weight is heavy above all.

Further, since the component made of fiber-reinforced synthetic resin described in the above publication has a hollow structure, it can be applied to a portion where a high load acts, such as a swing arm that supports the rear wheel in a vertically movable manner. Is unreasonable in strength. Also, since the swing arm has a rather complicated shape, a method of winding a reinforcing fiber woven fabric impregnated with a synthetic resin around a core portion and removing the core portion after heat molding (Japanese Patent Publication No. 59-49186), A method in which a hollow provided in the inner mold is filled with a reinforcing fiber woven fabric impregnated with a matrix resin, and a reinforcing fiber woven fabric also impregnated with a synthetic resin is wound thereon, followed by covering with an outer mold and heat molding. In Japanese Patent Publication No. 3-53121, a swing arm cannot be manufactured.

That is, in the case of using the former method in the above publication, it is necessary to provide an opening for extracting a core portion from a product. However, due to the structure of the swing arm, such an opening must be provided at several places. And their openings must eventually be closed. However, since it is difficult to integrally cover each opening with a reinforcing fiber woven fabric impregnated with a synthetic resin after the synthetic resin has been cured by heat molding, the former method cannot be applied. In the latter method, the reinforcing fiber woven fabric impregnated with the matrix resin is spread and filled in a mold corresponding to the swing arm so as to form the shape of the surface of the swing arm. It is almost impossible to spread the cloth to shape the surface of the swingarm.

[0007] The invention has been made in view of the above points, with the strength of the same degree and the swing arm molded by using a conventional aluminum alloy, greatly reduce the weight, motorcycle appearance even better It is an object of the present invention to provide a method of manufacturing a swing arm made of fiber-reinforced synthetic resin.

[0008]

In order to achieve the above object, a swing arm made of a fiber-reinforced synthetic resin according to the present invention is provided.
The manufacturing method is to cross the front of the pair of left and right arms
And connect the front ends of both arms with pivots.
The rear axle support holes are provided at the rear ends of both arms.
Manufacturing method of fiber reinforced synthetic resin swing arm for motorcycles
Pressure-resistant and heat-resistant hard foam
A pair of arms (2 · 2) is formed by a core material A made of a synthetic resin material.
2), cross member (3), pivot part (4)
Each is formed separately. Also, the hole wall of the axle support hole (5)
(5a), shock absorber support (6) of the cross member (3)
And the hole walls (4b) on both sides of the pivot hole (4a).
Wear-resistant fibers impregnated with matrix resin
It is formed in advance with a woven fabric (C) . The crossme
The plate (6a) for the shock absorber support (6) on the member (3)
Is embedded and bonded with an adhesive, and a pair of arms
At the rear of (2.2), a hole (5) for supporting the axle is drilled.
The hole wall (5a) is buried in the hole by bonding with an adhesive.
You. Hole walls (4b) are connected to both sides of the pivot part (4).
Adhere with adhesive. And before a pair of arms (2.2)
Connect the cross member (3) between the parts by bonding with an adhesive
At the front end of the arm (2.2)
(4) is connected by bonding with an adhesive, and the core material (A) is used.
To form the swing arm body. The swing-a
Matrix on the surface of the core material (A)
Stacking multiple thin reinforced fiber woven fabrics impregnated with resin (B)
Wound layer or thin reinforced fiber woven fabric
(B) is wound and laminated into a plurality of layers. The core material
(A) on the entire surface of the swing arm body
Reinforced fiber woven fabric (B) impregnated with resin
Later, the base and the inner frame member
It is movably arranged on the base in the direction facing the inner frame member.
On the outer frame member, the inner frame member and the outer frame member
A swing plate having a lid plate detachably mounted on the swing door.
Into the mold (10) corresponding to the shape of the
Cover the lid plate (11) and autoclave the entire mold (10)
And heat for several hours under pressure. This allows
The matrix resin cures and the swing arm body is assembled.
Core material (A) to be formed and reinforcing fiber woven covering the entire surface
Cloth (B) is integrated and the swing arm is formed
You. After that, stop heating and remove after sufficient cooling.
Remove the mold (10) from the autoclave by pressing
After that, remove the lid plate (11) and swing from the mold (10).
Remove the arm. It consists of the above steps
It is characterized by the following .

As set forth in claim 2, the mold (10).
On both sides of the swing arm 1 on its base (10a)
Rear of arm (2.2), rear of cross member (3)
The inner frame member (10b) that abuts the arm (2b)
・ 2) The rear frame member (10c) contacting the rear end is
Each of them is integrally erected by a plurality of bolts 12,
Of the swing arm 1 on the base (10a).
A pair of left and right outer frame members (10d) contacting both side surfaces,
How to and opposed to each other across said inner frame member (10b)
In the direction (width direction of the mold 10).
On the base (10a), a cross member (3) and a pivot
A substantially trapezoidal intermediate frame member (10e)
Is a front frame member (1) abutting on the front surface of the pivot portion (4).
0f) is movable in the longitudinal direction of the mold (10).
And the mold (10) covers the upper surface thereof
A lid plate (11) is provided.
And has a shape substantially corresponding to the upper surface of the arm 1.
It is detachably mounted on the frame members (10b to 10f),
The front frame portion is provided at the front end and the rear end of the plate (11), respectively.
From the upper surface of the material (10f) and the rear frame member (10c)
Holes (14,
It is more desirable that 15) is provided .

According to a third aspect of the present invention, the mold (1)
0) and the cover plate (11) are preferably cast iron.
Furthermore, as defined in claim 4, the reinforced fiber woven fabric (B)
Is manufactured using carbon fiber, glass fiber or aramid fiber.
A woven cloth, and the wear-resistant fiber woven cloth (C) is:
Woven fabric woven using glass fiber or carbon fiber
And the matrix resin is an epoxy resin or
It is preferably a thermosetting resin of a polyester resin .

[0011]

According to the method of the present invention for producing a swing arm made of fiber-reinforced synthetic resin , the core material (hard foam composite)
The surface of the swing arm body made of synthetic resin
Winding a reinforced fiber fabric impregnated with a trix resin
Pressurizing and heating to form a single piece.
Swing arm can be manufactured reliably and easily.
Beautifully designed swing arm finish
(From the appearance) is also excellent. In addition, using a mold
Pressing and heating, the swing arm inserted in the mold
Since the pressing force acts evenly on the entire system,
Becomes extremely good .

According to the second aspect of the present invention , the mold is
When pressure is applied in a toclave (not shown)
Then, a reinforcing fiber woven fabric B is wound around the surface, which is fitted in the mold.
Moveable with respect to the attached swing arm body (core material A)
The movable frame member (outer frame member 10d in FIG. 7) is fixed.
It is moved in the direction of the inner frame member 10b and pressed, and
11 pushes the swing arm body (core material A) downward
So that the swing arm body (core material A) and its
The pressing force acts evenly on the reinforcing fiber woven fabric B on the surface
Will be. As a result, a swing door with a good finish
The arm 1 is formed .

The mold 10 and the cover plate 11 according to claim 3
According to this, the expansion coefficient of the core material A and that of the reinforcing fiber woven fabric B are almost the same.
When heated in an autoclave
No position between the mold 10 and the swivel arm inside
This does not occur and the finish is good .

According to the manufacturing method of the fourth aspect,
The core resin A of the swing arm body is
Reinforced fiber woven fabric B covering the entire surface is securely integrated
And the reinforcing fiber woven fabric B is a tough and wear-resistant fiber woven fabric C
Has excellent wear resistance, making the swivel arm durable.
And can withstand long-term use .

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a fiber-reinforced synthetic resin swing arm according to the present invention will be described, and a method of manufacturing the same will also be described with reference to embodiments.

FIG. 1 is a plan view showing a cross section of a part (right half) of a swing arm according to the present embodiment, FIG. 2 is a side view of FIG. 1, FIG. 3 is a side view of a cross member, and FIG. It is a front view of a member.

As shown in FIGS. 1 and 2, the swing arm 1 has a pair of left and right arms 2.2 connected at the front by a cross member 3 and both arms 2.2 connected at a pivot 4. The rear ends of the arms 2 are provided with axle support holes 5 for rear wheels (not shown). On both sides of the lower surface of the cross member 3, support portions 6 of a shock absorber (not shown) are integrally formed. As shown in FIG. 4, each support portion 6 includes a pair of opposed plate members 6.
6a, and a support hole 6b is formed in the lower part of the plate 6a.
It has a structure with a hole.

As shown in FIG. 1, the swing arm 1 has a structure in which the constituent members such as the arms 2 and 2 and the cross member 3 are integrated, and is basically a rigid foam composite having pressure resistance and heat resistance. A resin material is used as a core material A, and a reinforcing fiber woven fabric B impregnated with a matrix resin is wound around the surface of the core material A a plurality of times to form a laminated state. I have.

As the core material A, a rigid foam synthetic resin material having pressure resistance and heat resistance is used. As the reinforcing fiber woven fabric B, a cloth woven using carbon fiber, glass fiber, aramid fiber, or the like is used. As the matrix resin, a thermosetting resin such as an epoxy resin or a polyester resin is mainly used.

In the swing arm 1, the arm 2
The hole wall 5a of the axle support hole 5, the shock absorber support portion 6 of the cross member 3, and the hole wall 4b on both sides of the pivot hole 4a of the pivot portion 4 are resistant to the mounting of bearings (not shown). Materials with excellent wear properties are used. That is, it is formed by laminating a plurality of woven fabrics C woven using glass fibers or carbon fibers impregnated with a matrix resin into a tubular or plate-like shape, and then hardening by pressing and heating. The above-mentioned conventional method (Japanese Patent Publication No. 59-49186) can be used for this production.

If it is necessary to make a through-hole in the pivot part 4, the pivot part 4 is wound a plurality of times with a woven fabric B made of a reinforcing fiber in which the surface of a core material A is impregnated with a matrix resin. After the thermosetting, that is, after the entire swing arm 1 is integrally formed, a through hole may be formed by machining using a punch.

Next, the swing arm 1 of the above-described embodiment will be described.
A method for manufacturing the same will be described. First, a pair of arms 2 shown in FIG.
2, the cross member 3 and the pivot part 4 are formed separately from each other. The hole wall 5a of the axle support hole 5, the buffer support portion 6 of the cross member 3, and the hole wall 4b on both sides of the pivot hole 4a are each formed in advance with a carbon fiber woven cloth C impregnated with a matrix resin. I do.

As shown in FIG. 4, four plate members 6a for the shock absorber supporting portion 6 are embedded in the cross member 3 and adhered by an adhesive, and the rear portions of the pair of arms 2 are provided with axle supporting members. And a hole wall 5a is buried in the hole by bonding with an adhesive. A hole wall 4b is bonded to both sides of the pivot portion 4 with an adhesive. Then, the cross member 3 is bonded and connected between the front portions of the pair of arms 2 with an adhesive,
The pivot part 4 is bonded to the front ends of the arms 2 by bonding with an adhesive, and the core material A forms a swing arm body.

A plurality of thin (about 0.1 to 0.3 mm) thin reinforcing fiber woven fabrics B impregnated with a matrix resin are laminated on the surface of the swing arm body (core material A), or The reinforcing fiber woven fabric B is wound and laminated in a plurality of layers. When laminating a plurality of reinforcing fiber woven fabrics B, it is necessary to consider changing the direction of the weave of the woven fabric B alternately so that the strength of the swing arm 1 becomes totally uniform. desirable.

In this manner, the reinforcing fiber woven fabric B impregnated with the matrix resin is laminated on the entire surface of the swing arm body made of the core material A, and then fitted into a mold 10 (FIG. 5) described later. Cover the lid plate 11 (FIG. 6) and
Into an autoclave (not shown). And
A pressure (2 to 3 atm) required for molding is applied, and heating is performed at a predetermined temperature (about 120 ° C. to 130 ° C.) for several hours (usually about 2 hours). Thereby, the matrix resin is cured, and the swing arm body (core material A) and the reinforcing fiber woven fabric B covering the entire surface thereof are integrated, and the swing arm 1 is formed. Thereafter, the heating was stopped, and the pressure was reduced in a sufficiently cooled state.
If the swing arm 1 is taken out from the mold 10 by removing the cover plate 11 after taking out 0, a series of molding operations is completed.

Here, an example of a mold used for the above-mentioned pressurizing / heating forming operation will be described with reference to the drawings.

FIG. 5 is a plan view showing the mold with the cover plate removed, FIG. 6 is a side view showing the mold with the cover plate attached, and FIG. 7 is along the line VII-VII in FIG. It is the schematic diagram which represented the cross section state typically.

As shown in FIG. 5 and FIG.
The inner frame member 10b abutting on the back of the arms 2.2 on the swing arm 1 shown in FIG. 1, the rear surface of the cross member 3, and the rear ends of the arms 2.2 on the base 10a. And a rear frame member 10c that comes into contact with the rear frame member is integrally erected by a plurality of bolts 12. On the other hand, on the base 10a, a pair of left and right outer frame members 10d abutting on both side surfaces of the swing arm 1 are opposed to each other across the inner frame member 10b (the width direction of the mold 10). It is arranged movably. In addition, base 10
a, a substantially trapezoidal intermediate frame member 10 e is provided between the cross member 3 and the pivot portion 4, and a front frame member 10 f which is in contact with the front surface of the pivot portion 4 is movably arranged in the longitudinal direction of the mold 10. Has been established.

Further, the mold 10 is provided with a cover plate 11 for covering the upper surface thereof, and the cover plate 11
It is detachably mounted on 0b to 10f. Further, the lid plate 11 has a shape substantially corresponding to the upper surface of the swing arm 1, and the front end portion and the rear end portion of the lid plate 11 are connected to the front frame member 10f and the rear frame member 10c as shown in FIG. Holes 14 and 1 to be fitted into positioning pins 13 projecting upward from the upper surface
5 are drilled. The front hole 14 is an elongated hole so as to allow the front frame member 10f to move.

According to the mold 10 configured as described above,
When pressure is applied while the mold 10 is placed in an autoclave (not shown), as shown in FIG. 7 showing a part of the mold, a reinforcing fiber woven fabric is fitted into the mold 10 and has a surface. B
The movable frame member (outer frame member 10d in FIG. 7) moves in the direction of the fixed inner frame member 10b and pushes against the swing arm body (core material A) around which the cover plate 11 is wound. Since the swing arm main body (core material A) is pressed downward, the pressing force acts on the swing arm main body (core material A) and the reinforcing fiber woven cloth B on its surface as a whole. As a result, the swing arm 1 having a good finish is formed. The mold 10 and the cover plate 1
The material 1 is not particularly limited, but is desirably formed of a metal material having the same expansion coefficient as the core material A and the reinforcing fiber woven fabric B, for example, cast iron.

[0031]

As is apparent from the above description,
Method for producing the fiber-reinforced synthetic resin swing arm of the present invention
The law has the following effects:

(1) Formed with a core material (a hard foam synthetic resin material)
The surface of the swing arm body contains matrix resin.
Wind the soaked reinforcing fiber fabric, pressurize and heat
Since it is molded into the body, swingers with complicated shapes (structures)
The swing can be manufactured reliably and easily.
The arm finish is beautiful and excellent in design (from the appearance)
Have been. Furthermore, pressurizing and heating using a mold
To the entire swing arm inserted into the mold.
Since the pressure acts evenly, the finish is extremely good.
You .

(2) In the method according to the second aspect, the automatic
Swing arm body (core
Material) and the reinforced fiber woven fabric on the surface
Since it works evenly, a switch with good finish
The arm is formed .

(3) In the manufacturing method according to the third aspect, the core material and
Expansion coefficient is almost the same as
The mold and the inside of the mold
There is no misalignment with the iguarm etc.
Become good .

(4) In the manufacturing method according to the fourth aspect, the swivel
Conventional arm formed using aluminum alloy etc.
The same or better than a hollow swingarm
With strength, significantly reduced weight and considerable weight savings
It is highly durable and can withstand long-term use .

[Brief description of the drawings]

FIG. 1 is a plan view showing a cross section of a part (right half) of a swing arm according to an embodiment of the present invention.

FIG. 2 is a side view of the swing arm of FIG. 1;

FIG. 3 is a side view of the cross member of FIG. 1;

FIG. 4 is a front view of the cross member of FIG. 1;

FIG. 5 is a plan view showing an example of a mold in a state where a cover plate used in the manufacturing method of the present invention is removed.

FIG. 6 is a side view showing the mold (FIG. 5) with the cover plate attached.

FIG. 7 is a schematic diagram schematically showing a cross-sectional state along the line VII-VII in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Swing arm 2 Arm 3 Cross member 4 Pivot part 4 5 Axle support hole 5 6 Shock absorber support part 10 Mold A Core material B Reinforcement fiber woven fabric (impregnated with matrix resin) C Wear resistant fiber woven fabric (impregnated with matrix resin)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B29L 31:30 (72) Inventor Sosuke Kinouchi 1-1, Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries Inside the Akashi Plant (72) Inventor Shunichi Bando 1 Kawasaki-cho, Kakamigahara-shi, Gifu Prefecture Kawasaki Heavy Industries, Ltd. Inside the plant (72) Inventor Toshimi Taki 1 Kawasaki-cho, Kakamigahara-shi, Gifu Prefecture Kawasaki Heavy Industries, Ltd.Gifu Plant (72) Inventor Tatsuya Yamamoto 1, Kawasaki-cho, Kakamigahara, Gifu Prefecture Inventor Koichi Ogura 1 Kawasaki-cho, Kakamigahara-shi, Gifu Kawasaki Heavy Industries, Ltd.Gifu Factory (72) Inventor Katsuharu Sakamoto Each Gifu Prefecture 1 Kawasaki-cho, Hara-shi Kawasaki Heavy Industries, Ltd. Gifu Factory (72) Inventor Takahiko Tomita 1 Kawasaki-cho, Kakamigahara-shi, Gifu Kawasaki Heavy Industries, Ltd. Gifu Factory (56) References JP-A 55-1448674 A) JP-A-60-107471 (JP, A)

Claims (4)

(57) [Claims] A front member of a pair of left and right arms is a cross member.
And the front ends of both arms are pivoted.
Connected, rear axle support holes at the rear end of both arms
Manufacture of fiber-reinforced synthetic resin swing arms for motorcycles
In the method, from a rigid foam synthetic resin material having pressure resistance and heat resistance
A pair of arms (2.2) and a cross
Member (3) and pivot part (4) are formed separately
I do. Also, the hole wall (5a) of the axle support hole (5), the cross
Shock absorber support (6) and pivot hole for member (3)
The hole walls (4b) on both sides of (4a) are
Abrasion resistant fiber woven fabric (C) impregnated with
Pre-formed. The cross member (3) has a buffer support (6).
The plate (6a) is embedded and bonded with an adhesive, and
At the rear of the pair of arms (2.2) are holes for axle support
(5) is drilled, and the hole wall (5a) is connected to the hole with an adhesive.
Wear and bury. Hole walls on both sides of the pivot part (4)
(4b) is adhered with an adhesive. And a pair of arms
Cross member (3) between front parts of (2.2) with adhesive
Attach and connect with the front end of the arm (2.2)
The pivot part (4) is connected by bonding with an adhesive,
(A) forms a swing arm body. Surface of core material (A) constituting the swing arm body
, A thin reinforced fiber woven fabric impregnated with a matrix resin
(B) winding or laminating a plurality of sheets
Wraps a thin reinforcing fiber woven fabric (B) and laminates it into multiple layers
You. The entire surface of the swing arm body made of the core material (A)
Reinforced fabric woven cloth impregnated with matrix resin (B)
After stacking, the base and the
Move on the side frame member and the base in the direction facing the inner frame member.
On and outside the movably disposed outer and inner frame members
And a lid plate detachably mounted on the side frame member.
In the mold (10) corresponding to the shape of the swing arm body
Insert and cover the lid plate (11), and
Place in a toclave and heat under pressure for several hours. This
As a result, the matrix resin hardens and swing
Core material (A) that constitutes the main body and covers the entire surface
Reinforced fiber woven fabric (B) is integrated with the swing arm
Molded. After this, the heating was stopped and it was cooled sufficiently
The mold (10) is released from the autoclave under the condition
After taking out, remove the lid plate (11) and check whether it is in the mold (10).
And take out the swing arm. From the above steps
Motorcycle motorcycle fiber-reinforced synthetic resin
Method of manufacturing swing arm . 2. The mold (10) has a base (10).
a) On both sides of the swing arm 1 (2.2)
Rear, inner frame that abuts the rear surface of cross member (3)
Abuts the material (10b) and the rear ends of the arms (2.2) on both sides
And a plurality of bolts each having a rear frame member (10c)
(12) to be integrally erected,
Abuts on both sides of swing arm 1 on board (10a)
A pair of left and right outer frame members (10d)
(10b) The directions facing each other with the
(In the width direction) so as to be movable in the width direction.
a) On top, a cross member (3) and a pivot part (4)
A substantially trapezoidal intermediate frame member (10e) is provided between
The front frame member (10f) contacting the front surface of (4) is
Each of the molds (10) is disposed so as to be movable in the longitudinal direction thereof,
In addition, the mold (10) is provided with a lid plate (11) covering the upper surface thereof.
The lid plate (11) is provided on the swing arm 1.
And each of the frame members (10b
10f) is detachably mounted on the front of the lid plate (11).
The front frame member (10f) is provided at the end and the rear end, respectively.
Position protruding upward from the upper surface of the rear frame member (10c)
Holes (14, 15) to be fitted to the pin (13) are
The method for manufacturing a swing arm made of fiber reinforced synthetic resin for a motorcycle according to claim 1. 3. The mold (10) and the cover plate (11)
The method for producing a fiber-reinforced synthetic resin swing arm for a motorcycle according to claim 1 or 2, which is cast iron . 4. The reinforcing fiber woven fabric (B) is a carbon fiber,
Cloth woven using glass fiber or aramid fiber
And the wear-resistant fiber woven fabric (C) is glass fiber.
Or woven using carbon fiber.
The method for manufacturing a swing arm made of fiber reinforced synthetic resin for a motorcycle according to any one of claims 1 to 3, wherein the matrix resin is a thermosetting resin such as an epoxy resin or a polyester resin.