JPH0130309Y2 - - 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 downwardly and to install the air cleaner. To provide a drain structure for a fuel tank of a motorcycle, etc., which can be mounted and supported.

(Means for solving the problem) A means for solving the above problem is to install an air cleaner on the upper surface of the air cleaner case under the bottom plate of the fuel tank in motorcycles etc. that have an air cleaner installed under the fuel tank. The tip portion for receiving the lower end of the drain pipe is engaged with a locking protrusion provided thereon, and the middle portion extends along the top of the air cleaner case and is engaged with a part of the air cleaner case using a locking protrusion provided thereon.
This is achieved by providing an intermediate drain pipe whose lower part hangs down along the outer circumferential surface of the air cleaner case.

(Effect of the above means) According to the above means, since the drain pipe is provided along the top and side surfaces of the air cleaner case,
The lower end of this pipe can be connected to the drench pipe and extended below the vehicle body to perform the drain function.Also, since the drain pipe is attached to the air cleaner case, there is no need for installation or supporting members. The drain pipe is installed along the case so it is not visible from the outside.

(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 on the lower part of the frame, and the rear fork 7 that supports the rear wheel 6 from the rear of the frame rearwardly swings. 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 9b 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
A slope 10f is formed on one side, a mounting hole 10e is provided in the upper part of the slope 10f, and a hole 10g is provided in the lower part of the slope 10f, and an intermediate drain pipe made of an elastic material such as rubber and having a substantially slanted L shape when viewed from the front is attached to the mounting hole 10e. 14 will be erected.

The drain pipe 14 is brought into close contact with the lower surface of the tank bottom piece 9a, including the lower end of the drain pipe 13b, from below on a cup whose top end 14a opens upward, and the middle part 1 is placed diagonally from the cup-shaped end.
4b is lowered and placed along the slope 10f.
In the embodiment, two locking protrusions 14d are provided in the intermediate portion 14b with the tip end 14c shaped like an umbrella in the vertical direction, and these are provided in holes 10e and 10g provided in the slope 10f.
As a result, the middle part is engaged with the upper case, and the holes 10e and 10g are closed with rubber, etc., and the engagement is easy due to elastic deformation, and furthermore, the engagement is easy. Since the air cleaner 10 is on the side _S2 at the landing site, there is no problem even if air flows in. The lower half 14e of the pipe 14 hangs down along this side of the air cleaner 10 and is connected to a drench tube 15, which extends downward along the main frame 1a.

In the embodiment, the drain pipe 14 was made of rubber, but
It may also be made of synthetic resin or the like.

(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 along the air cleaner, it is not visible from the outside, and the appearance It is preferable in terms of performance, and because the air cleaner case has a mounting hole and the locking protrusion of the drain pipe is locked, there is no need for a separate supporting member for the drain pipe, reducing the number of parts. If it is made of rubber or the like, it will be easy to attach and detach, and the sealing properties around the drain pipe on the tank side will be good.

The present invention has the above-mentioned advantages.

[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 a motorcycle or the like in which an air cleaner is installed under the fuel tank, the tip of the air cleaner case that receives the lower end of the drain pipe exposed under the bottom plate of the fuel tank is secured to the upper surface of the air cleaner case using a locking protrusion provided thereon.
An intermediate drain pipe is provided in which the middle part runs along the top of the air cleaner case and is fixed to a part of the air cleaner case by a locking protrusion provided thereon, with the lower part hanging down along the outer circumferential surface of the air cleaner case. A drain structure for a fuel tank of a motorcycle, etc., characterized by: