JPS5837746Y2 - motorcycle fuel tank - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fuel tank for a motorcycle, and specifically relates to a fuel tank equipped with a fuel gauge.

As shown in FIGS. 1a, b, and c, the fuel tank of a motorcycle is generally supported by the frame 2 by straddling the frame 2, so the cross section with the recessed part 3 in the lower center has a roughly inverted U-shape. It has a structure including a fuel chamber 4.

In the fuel tank I having such a structure, the fuel gauge 5 has recently been installed so as not to damage the appearance of the fuel tank 1 and to prevent the mounting members, wiring members, etc. from being exposed, for example, as shown in the figure. It is attached to the bottom of one side.

However, installing the fuel gauge 5 in such a position is good if the fuel tank is large to some extent, but with the current technology level where the fuel gauge 5 cannot be made small, a certain flat area is required on the fuel tank opening side. Therefore, due to the space available, it was not possible to install the salary gauge 5 on the teardrop-shaped small tanks installed in the currently popular American sports cars.

In fact, the smaller the capacity of the fuel tank, the more necessary the fuel gauge 5 is.

As shown in FIGS. 2a and 2b, a fuel gauge 5 is attached to the side W3a of the recessed part 3 of the fuel tank 1.
In this case, when press manufacturing the bottom plate of the fuel tank, it is necessary to drill a hole 6 in the side direction of the bottom plate for attaching the fuel gauge 5, so the manufacturing process of the bottom plate is similar to that of the bottom plate of the fuel tank 1 shown in Fig. Productivity is worse than when press-manufacturing.

In addition, the side wall 3a of the concave portion 3 is sloped so that it can be removed when the bottom plate of the fuel tank I is press-molded, so that the float T of the fuel gauge 5 has an angle of α0 relative to the fuel tank (horizontal surface). Since it operates with an angle (draft angle of the bottom plate), a mechanism to compensate for the angle is required in the fuel gauge 5 or fuel quantity indicator.

In order to correct the malfunction of the float 7 described above on the fuel tank i side, a part of the side wall 3a of the recessed part 3 should be made vertical as shown in FIG. 3, and the fuel gauge 5 should be attached to this part. In this case, it is necessary to press the bottom plate of the fuel tank I with a press, resulting in poor workability.

The present invention was developed in view of the above-mentioned problems; the manufacturing process for the bottom plate of the fuel tank is simple, most of the parts of the fuel gauge can be used with conventional products, and it can also be used for small fuel tanks in a space-saving manner. The purpose of the present invention is to provide a fuel tank for a motorcycle to which a fuel gauge is attached without being subject to any restrictions.

An example of a fuel tank according to the present invention is shown below in Fig. 4a *
To explain this in terms of bsc, the fuel tank 1 has a structure in which a recessed part 3 is provided at the lower center of the tank to straddle a frame 2 and support the frame 2, and a fuel chamber 4 has a roughly inverted U-shaped cross section. This is the same as before.

According to the present invention in such a fuel tank I, a flat portion 17 is formed at an appropriate location on one side of the ceiling wall 3b of the recessed portion 3, a through hole 6 is bored in the flat portion τ7, and the through hole 6 is formed in the flat portion τ7. A gauge mounting flange 8 is fixed to the periphery of the gauge via an annular reinforcing plate 7.

This gauge mounting flange 8 is provided with an annular groove 9,
An O-ring IO is inserted into this annular groove 9.

Then, insert the fuel gauge 5 into the fuel chamber 4 through the gauge mounting flange 8, cover the gauge mounting flange 8 with the gauge mounting plate tt, and tighten the gauge mounting flange 8 to the gauge mounting flange 8 with screws 2 at several places on the outer circumference. Attach and fix the fuel gauge 5
Attach it horizontally to the fuel tank L.

The float 16 of the fuel gauge 5 is located in the inverted U-shaped fuel chamber 4.
The fuel gauge 50 is supported by a float lever 18 which is bent parallel to the front side when viewed from the side so as to be arranged on one side, and bent in an L shape when viewed from the side. A stopper 20 is provided to restrict the rotation of the float lever I8 so that the float 16 does not follow the liquid level below a constant O level.

2" is the wiring member 22 exposed on the outer surface of the gauge mounting plate τI
This is a cover that is placed over the gauge mounting plate II and secured to the gauge mounting flange 8 in order to protect the gauge mounting plate II.

As described above, the fuel tank of the present invention has the ceiling wall 3 of the concave portion 3.
A flat part 17 is formed on one side of the fuel gauge 5, and the fuel gauge 5 is mounted horizontally on this flat part 7, so that the attitude of the fuel gauge 5 is stabilized.

Moreover, since there are few space restrictions for installing the fuel gauge 5, even if the fuel tank is small, the fuel gauge 5 can be installed easily.
If the fuel gauge 5 is attached to a small tank with a design that particularly appeals to users, the product appeal will be improved.

Further, the manufacturing process of the bottom plate of the fuel tank 1 is simple and has good productivity, as in the case of the fuel tank shown in FIG.

Furthermore, most of the parts of the fuel gauge 5 can be replaced with conventional products, so there is no need to manufacture a new dedicated fuel gauge.

Furthermore, if the flat part I7 on one side of the ceiling wall 3b where the fuel gauge 5 is mounted is recessed upward, the mounting part of the fuel gauge 5 can be attached to other parts such as the frame 2 when assembling the fuel tank. Since the fuel gauge 5 does not come into contact with the fuel gauge 5, it can be assembled to the frame 2 without paying attention to the fuel gauge 5, which has the effect of improving work efficiency.

[Brief explanation of the drawing]

Figures 1a, b, and c are longitudinal cross-sectional views, side views, and bottom views of essential parts showing an example of a conventional fuel tank equipped with a fuel gauge;
Figures 2a and b are the same. Fig. 3 is a longitudinal cross-sectional view and side view of the main part showing another example of a conventional fuel tank. Figures 4a, b, and c are a vertical cross-sectional view, a side view, and a bottom view of essential parts showing an example of the fuel tank of the present invention equipped with a fuel gauge. DESCRIPTION OF SYMBOLS 1... Fuel tank, 3... Recessed part, 3b... Ceiling wall, 5... Fuel gauge, I7... Flat part.

Claims (1)

[Scope of utility model registration request] In a fuel tank having a fuel chamber having an inverted U-shaped cross section and a recessed portion at the lower center, a flat portion is formed on one side of the ceiling wall of the recessed portion, and a fuel gauge is mounted on the flat portion. A fuel tank for a motorcycle, characterized in that it is attached to a fuel tank.