JPS6343881A - Motorcycle - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a motorcycle in which mass is concentrated in the vehicle body to improve maneuverability.

(Prior Art) As one means of improving the maneuverability of a motorcycle, various methods have been conventionally used to concentrate mass in the vehicle body.

(Problem to be Solved by the Invention) By the way, when attempting to concentrate the mass as described above, a relatively heavy fuel tank is disposed below the seat and near the seat, thereby increasing the fuel tank. One possibility is to bring it closer to the rider sitting on the seat.

However, the seat is provided at a low position in order to ensure that when the rider straddling the seat extends his legs, his legs can reliably touch the ground.

Therefore, the area below the seat is a narrow portion of the surplus space, and if the fuel tank is simply disposed there, there is a risk that the capacity of the fuel tank will be reduced due to the effect of the seat.

(Purpose of the Invention) This invention was made in view of the above-mentioned circumstances, and aims to concentrate the mass by bringing the heavy fuel tank closer to the rider, thereby improving maneuverability. , and the purpose is to ensure sufficient fuel tank capacity even when the mass is concentrated in this way.

(Structure of the Invention) A feature of the present invention for achieving the above object is that a fuel tank is disposed below the seat and near the seat, and the outer surface of the fuel tank in the vehicle width direction is It is located at a point that protrudes outward from the outer surface of the seat.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In Figure 2, l is a motorcycle, and this motorcycle 1
The vehicle body frame 2 has a steering shaft tube 3 at the front thereof, and a front fork 4 is rotatably supported on the steering shaft tube 3. A front wheel 6 is supported at the lower end of this front fork 4, and a handle 7 is attached to the upper end of the front fork 4. 8 is a headlamp.

On the other hand, a rear arm 9 is pivotally supported at the rear lower part of the vehicle body frame 2 by a pivot shaft 10 so as to be vertically swingable, and a rear wheel 12 is supported at the swinging end of the rear arm 9. Further, a shock absorber 13 is installed between the swinging end of the rear arm 9 and the rear upper part of the vehicle body frame 2, and this shock absorber 13 is designed to prevent the rear wheel 12 from moving away from the running surface while the motorcycle 1 is running. Buffers the vibrations received.

14 is an engine, and this engine 14 drives the rear wheels 12. Further, a seat 15 is supported on the vehicle body frame 2 between the engine 14 and the rear wheels 12, and a rider 16 is seated on the seat 15.

The engine 14 has a pair of front and rear cylinders 18 and a crank case 19. Each cylinder 1 above
A carburetor 20 is attached to each of the 8 intake boats. Additionally, an air cleaner 2 is provided on the intake side of the carburetor 20.
1 is attached, and this air cleaner 21 is provided at the upper front part of the vehicle body frame 2. These body frames 2
A cover unit 22 that covers the front upper part of the car and the air cleaner 21 is screwed to the vehicle body frame 2.
2 is formed to resemble a conventional fuel tank in appearance.

Exhaust pipes 24 connected to the exhaust ports of each of the cylinders 18 are provided. The rear end of each exhaust pipe 24 extends to the rear of the vehicle body and is connected to an exhaust chamber 25. Furthermore, a pair of mufflers 26.2 are connected to the exhaust chamber 25.
6 are connected.

Fuel is fed into the carburetor 20, and this is fed into the cylinder 1.
When the engine 14 is activated by combustion within the engine 8, power is transmitted to the rear wheels 12 through a power transmission device linked to the engine 14 and a drive shaft 28 provided within the rear arm 9. Exhaust from the cylinder 18 is carried out through an exhaust pipe 24.
, the exhaust chamber 25 and the muffler 26 and are exhausted.

The seat 15 of this motorcycle 1 is supported at a relatively low position on the rear upper surface of the body frame 2. The posture of the rider 16 on the seat 15 is such that the upper body is substantially upright, the knees extend forward, and the knees extend downward substantially perpendicularly to the knees and are positioned to the side of the engine 14.

A footrest 27 is provided on the front side of the crankcase 19.
A protruding footrest 27 is provided on which the feet of the rider 16 are placed.

A fuel tank 29 for storing fuel for the carburetor 20 and a storage battery 23 are disposed below the seat 15 and in the vicinity of the seat 15.

1, 3, and 4, the rear part of the vehicle body frame 2 has a pair of left and right seat rails 30.30 formed of pipes, and the seat 15 is supported on these seat rails 30.30. It is. Further, a rear frame 31 formed of a pipe and having a U-shape in side view is connected to each of the seat rails 30, respectively. Furthermore, these left and right carrier frames 31, 31 are connected by a cross member 32. A pivot shaft 1 that pivots the rear arm 9 to a bracket 33 protruding from the lower end of these rear frames 31.
0 is supported.

Above seat rail 30.30 and rear frame 31.31
The fuel tank 29 is located in a space surrounded by the cross member 32 and the cross member 32, and the fuel tank 29 is supported at the rear of the vehicle body frame 2 via an elastic shock absorber 34 such as rubber.

35 is a fuel cap, 36 is a fuel pump, and this fuel pump 36 feeds the fuel in the fuel tank 29 to the carburetor 20. Further, a fuel filter 37 is interposed between the fuel pump 36 and the fuel tank 29. Also, 38
is an air bleed pipe, and 39 is a rollover valve.

The outer surface of the fuel tank 29 in the vehicle width direction passes between the seat rail 30 and the rear frame 31 and protrudes outward from the outer surface of the seat 15, so that the fuel tank 29 has a predetermined capacity. It is secured. in this case,
The legs of the rider 16 on the seat 15 are located in front of the fuel tank 29, and the rider 16 and the outer surface of the fuel tank 29 do not interfere with each other.
Even if the outer surface of the seat protrudes as described above, the rider 16 on the seat 15 will not be adversely affected.

Further, a side cover 41 is provided to cover each outer surface of the fuel tank 29. This side cover 41 is screwed to the seat rail 30.

Further, a cover 42 is provided to cover the upper surface of the fuel pump 36. This cover 42 prevents fuel from accidentally splashing onto the fuel tank 29 when fuel is injected.

In FIG. 5, the handle 7 is connected to the front fork 4.
It is supported by a pair of left and right handle holders 45, 45 on a handle crown 44 that constitutes the upper part of the handle.

A pilot lamp box 46 is provided between the handle holders 45 and 45, and this box 46 accommodates a turn signal lamp, a lamp indicating the neutral state of the power transmission device, a warning lamp, and the like.

47 is a speedometer.

In FIGS. 6 and 7, side cases 49 are provided on the front side surfaces of the vehicle body frame 2, respectively. This side case 49 has two bowl-shaped bodies 49a and 49b made of resin.
It is formed by joining together with a screw 50 so that it can be opened and closed freely,
One of the bowl-shaped bodies 49a is connected to the vehicle body frame 2 by the pole) 51.
It is screwed on the side. And left and right side cases 4
Inside the right side case 49 of 9 are an ignition unit 53 for the engine 14, a pump relay 54 for the fuel pump 36, a flasher relay 55, and other relays 5.
6 is accommodated.

According to the above embodiment, firstly, the fuel tank 29 is disposed below the seat 15 and near the seat 15, and the heavy fuel tank 29 and storage battery 23 are brought close to the rider 16 to increase mass. At the same time, the relatively lightweight air cleaner 21 and the side cover 41 that houses the electrical components are located at a distance from the rider 16, which makes the mass concentration more effective and improves maneuverability. It is beneficial.

Second, among the electrical components, only those that affect the rider's vision are attached to the handlebar 7, and the relays and the like that operate them are provided inside the side case 49.
The inertial mass that affects the operation of the handle 7 can be reduced.

Third, the ignition unit 53, pump relay 54, other relays 56, etc., which were conventionally attached to the frame under the seat 15, are housed in the side case 49, so when the vehicle is running, the wind flowing along the side of the vehicle body disturbs them. The heat generated from the relay can be cooled down.

(Effects of the Invention) According to the present invention, since the fuel tank is disposed below the seat and near the seat, the heavy fuel tank can be brought closer to the rider on the seat. Therefore, since the mass can be concentrated, maneuverability can be improved. Furthermore, the weight of the fuel tank increases or decreases as fuel is consumed or refilled, which changes the center of gravity of the vehicle, but since this fuel tank is installed close to the rider, it may change the rider's driving posture slightly. This change can suppress the change in the center of gravity position of the vehicle body. Therefore, in this respect as well, improved maneuverability is achieved.

Furthermore, since the outer surface of the fuel tank in the vehicle width direction is made to protrude further outward than the outer surface of the seat, the capacity of the fuel tank can be increased by the amount that the fuel tank protrudes in this way.

In this case, the fuel tank is below the seat, and
On the other hand, the rider's legs seated on the seat are located in front of the seat, so the rider's legs are located in front of the fuel tank. Therefore, even if the outer surface of the fuel tank is made to protrude further outward than the outer surface of the seat as described above, this will not interfere with the rider. By bringing the fuel tank closer to the rider, it is possible to concentrate the mass and obtain good handling stability, while ensuring sufficient fuel tank capacity without adversely affecting the rider.

[Brief explanation of drawings]

The figures show an embodiment of the invention, and FIG. 1 is I-I in FIG.
Figure 2 is an overall side view of the motorcycle; Figure 3 is a cross-sectional view taken along the line;
The figure is a partially enlarged view of Fig. 2, and Fig. 4 is the TV-mV of Fig. 3.
5 is a view taken along the line V-V in FIG. 2, FIG. 6 is a side view showing the inside of the right side case, and FIG. 7 is a plan view showing the inside of the same side case. be. 1. Motorcycle, 2. Body frame, 15. Seat, 29φ fuel tank.

Claims (1)

[Claims] 1. A motorcycle characterized in that a fuel tank is disposed below the seat and in the vicinity of the seat, and the outer surface of the fuel tank in the vehicle width direction projects further outward than the outer surface of the seat. .