JP3290940B2 - Body frames for motorcycles, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body frame for a motorcycle such as a scooter type motorcycle.

[0002]

2. Description of the Related Art Conventionally, as a body frame of a scooter type motorcycle or the like, for example, an aluminum frame 51 as shown in FIG.
Is known as an integrated structure, but vehicles in which the frame is made of fiber-reinforced resin for further weight reduction, etc., are also known. And a rear frame mainly composed of a luggage box connected to the rear end of the front frame extending obliquely downward and horizontally toward the front frame. In particular, in the case of a scooter-type motorcycle or the like, since a part of the frame becomes a step floor approaching the ground, the aluminum frame 51 is used.
In the case of (1), a skid sheet 52 as shown in FIG.

[0003]

However, in the case of a conventional body frame made of resin, if the length of the body is to be changed in accordance with the diversification of models, for example, the front frame or the rear frame is changed. There is a problem that it is necessary to make a new one and the cost increases. Further, when the skid sheet 52 is mounted on the step portion as in the case of an aluminum frame, there is a problem that the number of components increases and mounting work is required.

[0004] Accordingly, the present invention provides a vehicle body in the longitudinal direction,
It is an object of the present invention to provide a vehicle body frame that can be easily and inexpensively changed in shape and the like and has a simple form.

[0005]

To achieve the above object, according to the present invention, a front frame extending a predetermined length rearward from a front portion of a vehicle body, and a rear frame below a seat are provided. And, forming a body frame from an intermediate frame connecting the front frame and the rear frame ,
Front and rear frames common to multiple models
And by changing the intermediate frame
The size, shape, etc. of the body were changed .

In this way , a common front frame and a rear frame can be used for a plurality of models, so that the cost is reduced, and the parts are shared and the maintenance is facilitated. .

According to the second aspect, the rear frame is provided with a luggage.
The box was mainly composed. Like this
The frame is mainly composed of
It can be formed compactly, and the overall body is simplified and light
Quantification can be achieved. According to a third aspect of the present invention, at least a front frame and a rear frame of the body frame are formed of fiber reinforced resin.

If the front and rear frames, which are at least the main parts of the body frame, are made of fiber reinforced resin, the weight of the vehicle body can be reduced. Here, the resin material of the fiber-reinforced resin may be a thermoplastic resin or a thermosetting resin, and the reinforcing fibers are arbitrary such as glass fiber, carbon fiber, ceramic fiber, and aramid fiber.

According to a fourth aspect of the present invention, the skid sheet is provided integrally with the front frame. By providing the skid sheet integrally with the front frame in this way, the number of components can be reduced, and the trouble of separately mounting the skid sheet can be omitted.

According to a fifth aspect of the present invention, a frame made of fiber reinforced resin is formed by a flow molding method from a laminated sheet in which a long fiber mat and a thermoplastic resin are laminated.

Here, in the flow molding method, a predetermined amount of blank material is cut out from a laminated sheet in which a thermoplastic resin and a long fiber mat or the like are laminated in advance, and the blank material is heated at a temperature higher than the melting point of the resin, and is placed in a mold. Press molding in a state in which the resin is made to flow by using a flow molding method. If such a flow molding method is adopted, for example, a thermosetting resin is reinforced with chopped strand glass or the like, and SMC (sheetmol) for press molding is used.
Dingcompound) The strength per equivalent weight is improved as compared with molded articles, etc., and the Izod impact value can be increased about twice, and the molding cycle is shortened, resulting in excellent productivity.

As the long fiber mat, for example, a long glass fiber mat, a long carbon fiber, or the like can be used. As the thermoplastic resin, for example, a polypropylene resin or the like can be used.

[0013]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an overall view of a scooter type motorcycle to which the body frame according to the present invention is applied, FIG. 2 is a perspective view of the body frame, FIG. 3 is an explanatory view of a connected state of a front frame and an intermediate frame, and FIG. It is explanatory drawing of the connection state of a frame and a back frame.

A body frame of a motorcycle or the like according to the present invention is applied to, for example, a body frame 2 of a scooter-type motorcycle 1 as shown in FIG. 1. As shown in FIG. The rear frame 5 is mainly composed of a luggage box, and a seat 6 (FIG. 1) is provided above the rear frame 5.

Each of the front frame 3, the intermediate frame 4 and the rear frame 5 is formed of a fiber reinforced resin. In the embodiment, a laminated sheet obtained by laminating a thermoplastic resin polypropylene and a glass long fiber is used as a raw material. And is formed by a flow molding method.

That is, this flow molding method is based on, for example, a method in which a predetermined amount of blank is formed from a laminated sheet obtained by laminating a swirl mat of about 40 wt% which has been previously needle-punched with long glass fibers and polypropylene of about 60 wt% which has been subjected to heat and weather resistance treatment. The blank material is cut out, and the cut blank material is heated to about 200 to 220 ° C. higher than the melting point of the resin by a heater or the like to melt the resin to make it flow easily, and then the heated blank material is transferred to a mold. Immediately mold and press.

[0017] By such a molding method, the fibers are filled to the end, so that the strength per equivalent weight can be improved as compared with an SMC (sheet molding compound) molded product or the like, and the molding can be performed efficiently.

As shown in FIG. 3, the front frame 3 integrally includes a head pipe support portion 3a, a rising portion 3b, and a step portion 3c, and particularly a rising portion requiring bending rigidity or torsional rigidity. Regarding 3b, a plate-shaped reinforcing member 8 is welded to the open section 7 to secure a rigidity in a closed section structure.

That is, the shape member 7 is used for the head pipe supporting portion 3.
a, which is integrally formed through the rising portion 3b and the step portion 3c from the head pipe support portion 3a.
Except for the above, the cross section is basically U-shaped with an open upper surface, and a plurality of lateral ribs 7r are protruded inside the U-shape to improve rigidity. The lower surface of the profile 7 of the step portion 3c also serves as a skid sheet. In this way, by forming the shape of the profile 7 into a substantially U-shape whose upper side is open, it is necessary to separately provide a skid sheet or the like. I try not to.

The intermediate frame 4 includes a connecting portion 4f for connecting to the front frame 3 and a connecting portion 4r for connecting to the rear frame 5, and if necessary, via a reinforcing material such as a metal plate. It can be connected with a connecting bolt.

That is, the connection between the intermediate frame 4 and the front frame 3 is performed, for example, in a state as shown in FIG. 3, and the intermediate frame 4 has a plurality of types having different lengths, inclination angles and the like. I am preparing things. By changing the type of the intermediate frame 4, while using the common front frame 3 and rear frame 5, the size of the vehicle,
Body frames with different shapes and the like can be configured.

The rear frame 5 is mainly composed of a luggage box as described above, and
The connection with r is made on the bottom surface of the luggage box as shown in FIG. If the connection is made at the bottom surface of the luggage box in this manner, it is not necessary to extend the rear end of the intermediate frame 4 to the rear unnecessarily, which saves material costs and is advantageous in terms of weight reduction of the vehicle body and the like.

The vehicle body frame 2 configured as described above is
By using a common front frame 3 and a rear frame 5 and differentiating the intermediate bram 4, different types of vehicle bodies can be constructed, manufacturing costs can be reduced, and maintenance can be performed. Maintenance becomes easy, too. Further, since there is no need to provide a skid seat on the lower surface of the step portion 3c of the front frame 3, it is possible to reduce the weight of the vehicle body, reduce material costs, and the like.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as that described in the claims of the present invention and exhibiting the same operation and effect belong to the technical scope of the present invention. For example, the coupling structure between the front frame 3 and the intermediate frame 4 or the coupling structure between the intermediate frame 4 and the rear frame 5 is arbitrary, and the intermediate frame 4 may be made of metal such as aluminum instead of resin.

[0025]

As described above, the vehicle body frame of the motorcycle and the like according to the present invention is constituted by the front frame, the intermediate frame and the rear frame, as described in claim 1, so that the vehicle body frame can be obtained only by changing the intermediate frame. The size, shape, and the like can be changed, and a plurality of models can be easily configured while using a common front frame and rear frame. For this reason,
The cost is reduced and parts are shared, which is advantageous in terms of maintenance. Also, as in claim 2,
If the rear frame is mainly composed of a luggage box, the intermediate frame can be made compact, the vehicle body can be simplified, and the weight can be reduced. Further, if at least the front frame and the rear frame are formed of fiber reinforced resin, the weight of the vehicle body can be reduced. Further, if the skid sheet is integrally provided on the front frame as in claim 4, the number of components is reduced and a simple configuration is obtained. In addition, if a molding is performed by a flow molding method from a laminated sheet obtained by laminating a long fiber mat and a thermoplastic resin, the strength per equivalent weight can be improved and the molding cycle can be shortened. I can do it.

[Brief description of the drawings]

FIG. 1 is an overall view of a scooter type motorcycle to which the present invention is applied.

FIG. 2 is a perspective view of a vehicle body frame.

FIG. 3 is an explanatory diagram of a connection state of a front frame and an intermediate frame.

FIG. 4 is an explanatory diagram of a connection state of an intermediate frame and a rear frame.

FIG. 5 is an example of a conventional body frame.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Scooter type motorcycle, 2 ... Body frame, 3 ... Front frame, 4 ... Intermediate frame, 5 ... Rear frame.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Shuichi Kawamoto 1-4-1 Chuo, Wako-shi, Saitama Inside of Honda R & D Co., Ltd. (56) References JP-A-7-156852 (JP, A) JP-A Sho 59-83621 (JP, A) JP-A-6-246742 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62K 11/10

Claims (5)

(57) [Claims] 1. A vehicle body frame comprising: a front frame extending rearward from a front portion of a vehicle body by a predetermined length; a rear frame below a seat; and an intermediate frame connecting the front frame and the rear frame. Make up and the front frame
And the rear frame are shared for multiple models.
In addition, by changing the intermediate frame,
A body frame of a motorcycle or the like characterized by changing a method, a shape, and the like . 2. A vehicle body such as the motorcycle according to claim 1.
In the frame, the rear frame is a luggage box
A motorcycle characterized by being mainly composed of a motorcycle
Etc. body frame. 3. The body frame of a motorcycle or the like according to claim 1 , wherein at least a front frame and a rear frame of the body frame are formed of fiber reinforced resin. Body frames for motorcycles and other vehicles. 4. The motorcycle frame according to claim 1 , wherein the front frame is provided with a skid seat integrally with the motorcycle body. Body frame. 5. The vehicle body frame of a motorcycle or the like according to claim 3 or claim 4, wherein the fiber reinforced resin frames, in a fluid molding a laminated sheet obtained by laminating a long-fiber mat and thermoplastic resin A body frame of a motorcycle or the like characterized by being formed.