JPH0434155Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a drain structure for a fuel tank of a motorcycle or the like.

(Prior art) The periphery of the mouthpiece of the fuel tank is formed in a concave shape,
Therefore, there is a risk that rainwater, etc. may leak, so a drain pipe that communicates the recessed part with the outside of the tank bottom is defined vertically inside the tank, and a drain tube is connected to the pipe to drain rainwater, etc. to the lower part of the vehicle body.

(Problem that the invention aims to solve) By the way, an air cleaner is installed using the space under the fuel tank, and according to this, the air cleaner is located above the engine and close to the carburetor, making it a reasonable solution. The fuel system can be arranged.

However, according to the above, since the air cleaner is provided directly under the bottom plate of the fuel tank, it becomes a hindrance to the above-mentioned drench tube extension.

The present invention has been developed to solve the above problems, and its purpose is to provide an air cleaner directly under the fuel tank and to allow the drench tube to extend downward. However, it is an object of the present invention to provide a drain structure for a fuel tank of a motorcycle, etc., which can be designed while increasing the rigidity of the case.

(Means for Solving the Problem) A means for solving the above problem is to install an air cleaner on the bottom plate of the fuel tank by protruding one end above the case of the air cleaner in a motorcycle etc. in which an air cleaner is arranged under the fuel tank. An intermediate drain pipe that receives the lower end of the drain pipe exposed below, has an intermediate portion facing into the space above the element in the air cleaner case, and has the other end protruding outward on one side of the air cleaner case is separated from the space inside the air cleaner case. The reason is that the air cleaner is provided in the air cleaner case.

(Effect of the above means) According to the above means, since the intermediate drain pipe is provided in the air cleaner case so as to pass through the inside thereof, the lower end of the intermediate drain pipe is connected to the drench pipe and the pipe is extended downward from the vehicle body. The drain function can be performed by
Furthermore, by forming the intermediate drain pipe with a rigid body, it also functions as a reinforcing material for the air cleaner case.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic side view of a motorcycle, in which a front fork 4 supporting a front wheel 3 is supported in a freely steerable manner via a head tube 2 at the front end of a frame 1.
The frame 1 includes a main frame 1a that is slightly tilted downward from the head tube 2, and a down tube 1b that hangs down.The engine 5 is mounted at the lower part of the frame, and the rear fork 7 that supports the rear wheel 6 from the rear of the frame is rocked. A seat 8 is provided on a seat rail 1c that is freely pivotable and extends rearward from an intermediate portion of the main frame 1a.

A fuel tank 9 is mounted on the front part of the frame 1, and an air cleaner 10 is arranged below this.The engine 5 is a V-shaped multi-cylinder engine when viewed from the side, and a carburetor 11 is provided in the V-shaped valley. There is.

2 and 3 are explanatory diagrams of the fuel tank. The tank 9 has an inverted concave cross section as shown in FIG. 3, and has a bottom piece 9.
A space S is formed between the left and right inner pieces 9b and 9c, and an air cleaner 10 is housed in the space S above the engine 5 and above the carburetor 11. A recess 9e is formed in the middle part in the width direction of the upper piece 9d of the tank 9,
A fuel injection mouthpiece 9f is provided here, and the cap 12
Open and close with . A drain pipe 13 is provided vertically between the recess 9e and the bottom piece 9a, and the drain pipe 13
The upper end 13a opens on the same horizontal plane above the recess 9e, and the drain pipe 13 connects to the space _S1 in the tank 9.
The lower end 13b projects downwardly from the bottom piece 9a.

The air cleaner 10 has upper and lower cases 10a, 10
An element 10c faces between b, and the space above the element is defined as a dirty side space _S2 , and _the space below is defined as a clean side. Upper piece 10d of upper case 10a
There is a hole 10e on the top, and a hole 1 on the side piece 10f on one side.
0g, and an intermediate drain pipe 14 which is approximately L-shaped when viewed from the front is installed. Drain pipe 14 has tip 1
4a protrudes from above the hole 10e of the upper piece 10d, the rear end 14b protrudes laterally through the hole 10g of the side piece 10f, and the middle part faces the space _S2 and is partitioned and insulated from the space _S2 . The pipe 14 is made of a rigid body such as metal or hard synthetic resin, and has a cup-shaped tip 14a that opens upward.
4a faces from below to cover the lower end 13b of the pipe 13 hanging down from the tank bottom piece 10a, and its peripheral edge abuts around the pipe lower end 13b of the bottom piece 10a.

Note that the pipe 14 may be formed of a rigid body and a cup-shaped member 114 may be bonded to the tip of the pipe. According to this, the sealing performance is improved by pressing against the pipe from below.

One end of the drench tube 15 is connected to the rear end portion 14b of the intermediate pipe 14 that protrudes to the side of the case, and the drench tube 15 is made to hang down on the side of the case so as to face the main frame 1a. It extends rearward and downward, with the other end facing downward and opening below the frame.

(Effects of the invention) As is clear from the above, according to the invention, the fuel tank can be drained while the air cleaner is disposed below, and since the drain pipe is passed through the air cleaner, it is not visible from the outside and the appearance is improved. preferred in that respect,
Furthermore, by forming the drain pipe with a rigid body, the strength of the air cleaner case can be improved, which helps prevent noise from the case, and since the case is used to support the drain pipe, no separate support member is required.

There are advantages as mentioned above.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a schematic side view of the motorcycle, Fig. 2 is an enlarged side view of the fuel tank and air cleaner section, Fig. 3 is a longitudinal sectional front view of the same, and Fig. 4 is a schematic side view of the motorcycle. FIG. 2 is a diagram of a modified embodiment of the drain pipe. In the drawing, 9 is a fuel tank, 10 is an air cleaner, and 14 is an intermediate drain pipe.

Claims (1)

[Scope of utility model registration request] In motorcycles etc. that have an air cleaner installed under the fuel tank, one end protrudes above the air cleaner case to receive the lower end of the drain pipe exposed under the bottom plate of the fuel tank, and the middle part is inserted into the space above the element inside the air cleaner case. 1. A drain for a fuel tank of a motorcycle, etc., characterized in that an intermediate drain pipe is provided in the air cleaner case so as to partition the air cleaner case from a space inside the air cleaner case, the other end of which projects outward from one side of the air cleaner case. structure.