JPS633354Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a fuel tank for a motorcycle that is composed of a main tank and a sub-tank.

For motorcycles with large engine displacements, or motorcycles that cannot secure sufficient fuel from the main tank alone due to installation space, a sub-tank may be provided in addition to the main tank to replenish any insufficient fuel. It's on. These main tanks and sub-tanks communicate with each other via a communication pipe,
Also, a breather pipe from the sub-tank opens into the main tank.

However, since the communication pipe and breather pipe are partially exposed to the outside, it is difficult to protect them, and on the other hand, it has been desired to increase the capacity of the sub-tank in order to further secure fuel.

The present invention was developed to solve this problem, and its purpose is to provide a fuel tank for a motorcycle that protects the communication pipe and breather pipe, and increases the capacity of the sub-tank.

A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

Fig. 1 is an overall side view of a motorcycle equipped with a fuel tank according to the present invention, Fig. 2 is an enlarged side view of the fuel tank portion of the motorcycle, and Fig. 3 is a cross section taken along the line 3-3 in Fig. 2. It is a diagram.

In the motorcycle 1 shown in FIG. 1, a front fork 5 that supports a front wheel 4 via a head tube 3 at the front of a body frame 2 is pivotably supported by upper and lower bridges 6 and 7 so as to be freely steerable. is provided with a handle 8.

A V-type engine 9 is mounted on the vehicle body frame 2, and this engine 9 is provided with front and rear cylinder units 11 and 12, each having a V-shaped side surface and inclined in the front-rear direction, on a crankcase 10. Exhaust pipes 13 and 14 extend from the cylinder units 11 and 12, respectively.
is communicatively connected to two left and right exhaust mufflers 15, 15. Also, a rear fork 17 is attached to the body frame 2 at the lower center of the vehicle body via a bracket 16.
The front end of the rear fork 1 is pivotably attached to the rear fork 1.
A rear wheel 18 is rotatably supported at the rear end of the vehicle 7.

On the other hand, behind the handle 8, there is a main tank 19 disposed on the upper surface of the vehicle body frame 2, and a sub tank 20 disposed below the vehicle body frame.
A fuel tank 21 is arranged, and a seat 22 is further provided behind the main tank 19.

The main tank 19 is of an open/close type so that the members below the tank 19 can be easily inspected, and the rear part of the main tank 19 has a bracket 2 as shown in FIG.
3 to the main body side, and is configured to swing up and down about the pivot point 24 to open and close. The outlet socket 25 of the main tank 19 is fixed to the vehicle body as shown in the figure, and care is taken so that the fuel pipe 27 between the socket 25 and the carburetor 26 does not change due to the opening and closing movement of the main tank 19.

On the other hand, the sub-tank 20 is of a fixed type, and is housed and fixed in an inverted triangular space formed by the body frame approximately in the center of the vehicle body below the body frame 2, and its upper part 20a is as shown in FIG. The portion 20a extends in a stepwise manner, and extends inside the seat rail frame 28 and above the seat rail frame 28, that is, to a portion above the lowest part of the main tank 19.

By the way, since the upper part of the conventional sub-tank was located below the seat rail frame, it is possible to increase the capacity of the sub-tank 20 by extending the upper part 20a of the sub-tank 20 to above the seat rail frame 28 as in this embodiment. Therefore, it is possible to store a larger amount of fuel than before. Further, since the sub-tank upper part 20a is disposed inside the seat rail frame 28, the frame 28 functions as a kind of protector for this part 20a, and can protect this part 20a from external damage.

Also, as shown in FIG. 3, the lower part 20 of the sub tank 20
b is similarly formed into a stepped shape, and an electrical component 29 such as a rectifier is compactly housed and fixed in the outer step portion 20c to improve the appearance. In addition, 30 in FIG. 3 is a side cover.

Further, a communication pipe 31 made of a flexible material and a breather pipe 32 made of a flexible material are connected horizontally and parallel to each other at the upper part of the back side of the sub-tank 20, and the sub-tank 20 is It communicates with the main tank 19 through a communication pipe 31, and a breather pipe 32 opens at a location higher than the top of the sub-tank in the upper part of the main tank 19, as shown in FIG. The breather pipe is disposed in a recessed portion of the main tank 19 that is formed to attach the main tank 19 to the vehicle body frame 2. Furthermore, the third
As shown in the figure, the end of the breather pipe 32 facing into the sub-tank 20 is bent upward and opened.
The fuel capacity of the sub-tank 20 can be increased. By the way, numeral 33 in the figure is a fuel pump.

Since the communication pipe 31 and the breather pipe 32 are arranged between the left and right seat frames 28 and inside the sub-tank 20, they are sufficiently protected from the outside. Its durability is improved.

As is clear from the above explanation, according to the present invention, since the upper part of the sub-tank is extended inside the vehicle body frame and above it, it is possible to increase the capacity of the sub-tank and protect it from external damage. Since the communication pipe communicating with the main tank and the breather pipe are arranged between the left and right seat frames, these pipes can be sufficiently protected from the outside.

In addition, in the present invention, the upper part of the sub-fuel tank is surrounded by a sheet, and the side part is covered by a side cover, so that it is not exposed to the outside at all, thereby improving the appearance of the motorcycle. be able to. In addition, the communication pipe and breather pipe that communicate the main fuel tank and the sub-fuel tank are surrounded by a sheet, and in particular, the breather pipe is disposed in a recess formed in the front-rear direction on the lower surface of the main fuel tank, so these communication pipes, The breather pipe is not exposed to the outside, and the appearance of the motorcycle can be further improved.
Moreover, on the other hand, it is also possible to protect the communication pipe and the breather pipe.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall side view of a motorcycle equipped with a fuel tank according to the present invention, FIG. 2 is an enlarged side view of the fuel tank portion of the motorcycle, and FIG. FIG. 3 is a sectional view taken along the line 3-3 in FIG. In the drawing, 2 is the body frame, 19 is the main tank, 20 is the sub tank, 21 is the fuel tank, and 28
3 is a seat rail frame, 31 is a communication pipe, and 32 is a breather pipe.

Claims (1)

[Claims for Utility Model Registration] A main fuel tank disposed on a frame extending rearward from the head pipe and having a recessed portion extending in the front and back direction on the lower surface, and left and right seat rails extending rearward from the frame. a seat mounted on the left and right seat rails, the tip of which abuts the rear end of the main fuel tank; and a seat disposed below the seat and the left and right seat rails and behind the fuel tank. In a motorcycle equipped with a sub-fuel tank, the upper part of the sub-fuel tank is bulged out above the height of the lowest part of the main fuel tank inside the left and right seat rails, and the upper part of the sub-fuel tank is surrounded by the sheet. At the same time, the side surface of the sub-fuel tank is covered with a side cover, the main fuel tank and the sub-fuel tank are communicated with each other by a communication pipe made of a flexible material, and a breather made of a flexible material is provided in the recessed part of the fuel tank. A pipe is provided to communicate the upper part of the sub-fuel tank with the upper part of the sub-fuel tank in the main fuel tank using the breather pipe, and the communication pipe and the breather pipe are connected to each other on the left and right sides. A fuel tank for a motorcycle, characterized in that it is located inside a seat rail and is surrounded by a seat.