JPH09150773A - Two-wheeled or three-wheeled automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight, strength, durability, and enhance the reliability by inserting a part into a frame so that both ends may be exposed, and attaching a rear suspension unit on one end. SOLUTION: A frame 1 is pinched by a brackets 2 for attaching a rear suspension integrally molded in a main frame 1 made of fiber reinforced resin and having a monocoque structure, and an RR rear suspension unit 4 is fixed by a nut 5. The RR rear suspension unit 4 is fixed through a distant collar 3 whose flange part is so enlarged so that stress to be transmitted to a resin frame through the rear suspension and to be produced caused by irregularities of the road surface may be dispersed without being concentrated. The attaching part of the RR suspension unit 4 and the opposite side are so attached that a washer 6 having the large sent surface may be pinched between a bolt 7 and the frame to ensure the connection of the bracket 2 to the frame 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear suspension unit mounting structure for a two-wheel or three-wheel vehicle having a fiber-reinforced resin main frame.
INDUSTRIAL APPLICABILITY The present invention uses a fiber reinforced resin or a resin as a material, and can be used in general devices for inserting metal. For example, a two-wheel electric scooter having a frame made of fiber reinforced resin may be used.

[0002]

2. Description of the Related Art A conventional rear suspension unit mounting structure for a two-wheeled or three-wheeled vehicle comprises a fiber-reinforced resin frame 10 molded and completed as shown in FIG. It is sandwiched between a bracket made of metal and a bracket A12 (made of metal), and the frame 10 is fixed by a plurality of bolts A17.
It is fixed to. A bolt B18 and a nut B1 are attached to a bracket C14 welded to the pipe portion that has entered the inside of the frame.
6 was used to attach the rear suspension 19 to the frame 10.

[0003]

The number of parts for attaching the rear suspension to the frame is large, the number of parts is large, the time required for assembly is large, and the weight of the vehicle body is reduced by using fiber reinforced resin for the frame. However, the weight is getting heavy.

[0004]

[Means for Solving the Problems]

Therefore, as a result of studies to solve the above problems, the inventors of the present invention insert a metal member into a fiber reinforced resin frame of a two-wheeled or three-wheeled vehicle body made of fiber reinforced resin so that both ends are exposed. However, it has been found that a two-wheeled or three-wheeled vehicle can be advantageously manufactured by attaching a rear suspension unit composed of a spring and a damping device, which is a device for restricting vertical movement of a tire due to unevenness of a road surface during traveling, to one end of the present invention. Was completed.
That is, an object of the present invention is to provide a two-wheeled or three-wheeled vehicle having a rear suspension mounting structure which is lightweight and has high strength, rigidity, durability, reliability and is advantageous in manufacturing.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
The material used for the structural frame of the present invention is not particularly limited. Examples thereof include metals, resins, ceramics, and composite materials obtained by combining these, and among them, resins or fiber-reinforced plastics are preferable. For example, when a thermosetting resin is used, a hand lay-up method, a spray-up method, a bulk molding method (BMC
Method), sheet molding method (SMC method), resin injection method, resin transfer molding method,
Reaction injection molding method (RIM method), reinforced reaction injection molding method (R
RIM method), structural reinforced reaction injection molding method (SRIM method)
Method), bag molding method, autoclave molding method, filament winding method, etc., and those using a thermoplastic resin, injection molding method, injection compression molding method, press molding method, vacuum molding method. Law,
Examples include those manufactured by a blow molding method, a hydraulic molding method, a stamping molding method, a thermoforming method, a filament winding method, and the like. Preferably, a fiber reinforcement is placed in a mold and a reactive resin is injected. The fiber reinforced plastics obtained by the resin transfer (RTM) molding method or the structural reinforced reaction injection molding method (SRIM method), which is cured after being cured, have a large mechanical strength and are suitable for industrial production. Is preferred.

The fiber reinforcing material used is not particularly limited, and glass fiber, carbon fiber, aramid fiber and the like which are usually used for fiber reinforced plastics are preferably used. As the resin, a thermosetting resin such as an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, a polyurethane resin, a polyurea resin, a dicyclopentadiene resin and a resin in which these are appropriately combined, or polyethylene, polypropylene, polyvinyl chloride,
Examples thereof include thermoplastic resins such as ABS, PPS, nylon, and polyether ether ketone. Particularly, RTM molding method,
When the fiber reinforced plastics are manufactured by the SRIM molding method, it is preferable to use an epoxy resin, a vinyl ester resin, an unsaturated polyester resin, or a resin containing these as a main component. The fiber content in the obtained fiber-reinforced plastic is usually 10 to 70% by volume, preferably 15 to 40% by volume, and more preferably 20.
The range of ˜30% by volume is preferred.

[0008]

According to the present invention, it is possible to obtain a rear suspension mounting structure for a two-wheeled or three-wheeled vehicle, which has high strength and reliability and is advantageous in manufacturing.

[0009]

EXAMPLES Hereinafter, the present invention will be described specifically and in detail with reference to Examples, but the present invention is not limited to the following Examples unless it exceeds the gist. FIG. 1 is an example of the appearance of an electric scooter embodying the present invention. FIG. 2 is a cross-sectional view taken along the line I-I of FIG. The present scooter is composed of a urethane foam core 8 filled inside surrounded by a main frame 1 having a monocoque structure made of fiber reinforced resin. The flange part is inserted so that the frame 1 is sandwiched between the brackets 2 for mounting the rear suspension integrally formed in the same frame, and the stress due to the unevenness of the road surface transmitted to the resin frame through the rear suspension is not concentrated but dispersed. The RR rear suspension unit is fixed by the nut 5 via the enlarged distance collar 3. Also, R
On the side opposite to the mounting portion of the R suspension unit, a washer 6 having a large seat surface is mounted by bolts 7 so as to sandwich the frame 1 in order to more securely connect the bracket 2 and the frame 1.

[Brief description of the drawings]

FIG. 1 is an external view of the electric scooter of the present invention.

FIG. 2 is a view taken along the line II of FIG.

[Figure 3] Conventional rear suspension unit mounting structure diagram

[Explanation of symbols]

 1 Fiber Reinforced Resin Frame 2 RR Suspension Mounting Bracket 3 Distance Collar 4 RR Suspension Unit 5 Nut 6 Washer 7 Bolt 8 Urethane Foam 10 Frame 11 Pipe 12 Bracket A 13 Bracket B 14 Bracket C 15 Nut A 16 Nut B 17 Bolt A 18 Bolt B 19 rear suspension

Front page continuation (72) Inventor Manabu Fujitani 1000 Kamoshida-cho, Aoba-ku, Yokohama-shi, Kanagawa Mitsubishi Chemical Corporation Yokohama Research Institute

Claims (1)

[Claims] 1. A two-wheeled or three-wheeled vehicle having a main frame made of fiber reinforced resin, wherein a member is inserted into the frame so that both ends are exposed, and a rear suspension unit is attached to one end.