JPS6283282A - Fuel-tank arrangement structure of low floor type motor two and three-wheel barrow - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fuel tank arrangement structure in a motorcycle or tricycle, such as a scooter or a family bike, which has a low step floor at the front lower part of the seat.

[Conventional technology]

In conventional motorcycles and tricycles of this type, the fuel tank is located below the seat or on the top surface of the rear fender behind the seat.

[Problem that the invention seeks to solve]

However, it is desirable that the fuel tank occupies a large area relative to the vehicle body so that it has a sufficient volume, and it is also desirable that the vehicle body weight be as low as possible.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fuel tank arrangement structure in which the fuel tank is disposed below the vehicle body to increase the volume of the tank.

[Means for solving problems]

The present invention has been devised for the above-mentioned purpose, and in a two-wheeled or three-wheeled motor vehicle equipped with a low step floor at the front lower part of the seat, a line connecting the axle centers of both wheels is provided between the front wheel and the rear wheel. The fuel tank is arranged so that the bottom plate of the fuel tank is at a lower position than the fuel tank, and the fuel pump is arranged above the bottom plate of the fuel tank.

[Function] Therefore, since the fuel pump is placed in a separate position away from the tank body, and the pump is not located below the tank bottom plate, it is possible to increase the space between the fuel tanks located at the bottom of the car body, and also to reduce the space between the fuel tanks located at the bottom of the car body. The center of gravity can be lowered.

[Actual drop example]

Hereinafter, an embodiment in which the present invention is applied to a two-wheeled scooter will be described based on the drawings.

The scooter 1 has a main vibe 3 of a body frame 2 at the upper part of the vehicle body in the longitudinal direction, and sub-vibes 4, 4 each having a substantially U-shaped side surface are arranged on both sides of the lower part of the main vibe 3.
, 4.4 is fixed with a head vibrator 8 which rotatably supports a bar handle 7 for steering a front fork 6 on which a front wheel 5 is suspended.

The head vibe 8 has an instrument panel 10 on a stay 9 protruding from the front of the vehicle body. A headlight 11 and a radiator 12 are fixedly installed, and the sub-vibrators 4, 4 support the rear end of the main vibrator 3 on a cross member 13 that is horizontally suspended on the rising part of the rear side of the vehicle body, and also support the rear end of the main vibrator 3 with the intermediate part toward the front side. The main vibe 3 between the stay 14 and the gusset 15 is connected to the stay 14 by a triangular plate-shaped gusset 15 on the rear side.
A large-sized fuel tank 17 is arranged in the sub-vibrator 4, 4 inner space. Below the rising part of the sub-vibe 4.4 and the rear end inclined part continuous thereto, there is a link 2 that is pivotally supported on the pivot shaft 19 of the pivot gusset 18.
A power unit 24 that integrally includes a cylinder 23 in the longitudinal direction of the rear wheel 22 is suspended by a rear suspension 21 that is pivotally supported on the rear end inclined portion.

A guide stay 25 is attached to the inclined rear end of the sub-vibrator 4.4.
A seat rail 26 that is held by a seat rail 26 protrudes toward the front of the vehicle body, and a guide stay 2
A luggage rail 28 held at 7 is provided to protrude toward the rear of the vehicle body.

This body frame 2 includes a front flap 6 at the front of the body and instruments'! ! A10. A front cover 29 that integrally covers various devices such as the headlight 11 and radiator 12
A footrest cover 30 is integrally formed with a low step floor 30b that covers the upper part of the floor vibrator 16 and 16, such as a center cover 30a that extends from the cover 29 and covers the main vibrator 3 in a protruding manner; A rear body 3 that continuously surrounds the power unit 24 and the upper part of the rear wheels 22 at the rear of the vehicle body.
1 is provided.

A tandem seat 32 supported by a seat rail 26 is arranged at the front of the rear body 31.
2 and the main vibrator 3, there is a battery 33, a carburetor brake 36 interposed between the cylinder 23 and the connecting vibrator 35 between the cylinder 23 and the air creep 34 which is integrally arranged in the vicinity of the power units i to 24. Intake system auxiliary equipment such as a passenger seat 37 is provided, and a language box 38 is fixedly mounted on the luggage rail 28 at the rear of the rear body 31.

The fuel tank 17 has a fuel filler port 17a on the upper right side of the vehicle body, and brackets 39 and 39 projecting outward from the center of the side of the gusset 15 connect the lower portions of the floor vibes 16 and 16, respectively. It is fixed to a plate-shaped cross member 40.40, and the bottom part is the front side bottom plate 17b.
and a rear side bottom plate 17G, and the rear side bottom plate 17c is recessed downward from the front side bottom plate 17b. The suction port 43a of the pipe 43 is open.

The rear side bottom plate 17C is arranged at the same level as the lower edge of the sub-vibes 4, 4, and both bottom plates 17b, 17c are aligned with the line connecting the axle center 5a of the front wheel 5 and the axle center 22a of the rear wheel 22. It is also located in a low position. The fuel pump 41 and fuel strainer 42 are disposed on one side of both tank bottom plates 17b and i7c, and a lock 44 is provided on the center cover 30a of the footrest cover 30 that covers the upper part of the fuel filler port 17a. A lid 45 is provided so that it can be opened and closed by a hinge 46.

Therefore, in this embodiment, since the bottom plate of the fuel tank is placed below the line connecting the axle centers of the rear wheels, the center of gravity can be set below the Φ body, and the tank capacity can be increased. Fluctuations in the gasoline liquid level in the horizontal and longitudinal directions can be minimized.

[Effect of investigation]

As explained above, the low-floor motorcycle/tricycle of the present invention has the following features:
The fuel tank is placed between the front and rear wheels so that the bottom plate of the fuel tank is lower than the line connecting the axle centers of both wheels, and the fuel pump is placed on the J:E side of the tank bottom plate. This makes it possible to lower the center of gravity of the vehicle, minimize the movement of the center of gravity due to changes in the amount of gasoline remaining, and also makes it possible to easily maneuver the vehicle with little force when the vehicle tilts to the left or right.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of a two-wheeled scooter, and FIG. 2 is a sectional view taken along the line [-n] of FIG. 1.

Claims (1)

[Claims] 1. For motorcycles and tricycles equipped with a low step floor at the front lower part of the seat, the bottom plate of the fuel tank should be positioned between the front and rear wheels so that it is at a lower position than the line connecting the axle centers of both wheels. A fuel tank arrangement structure for a low-floor motorcycle or tricycle, characterized in that a fuel tank is arranged and a fuel pump is arranged above the bottom plate of the fuel tank.