JP2003054469A - Air cleaner water-proof structure for motorcycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cleaner water-proof structure for a motorcycle capable of surely preventing the intrusion of the water into an air cleaner. SOLUTION: In the motorcycle provided with the air cleaner 24 in a space at a lower part of a seat surrounded by a side cover 15, a rib 31 covering at least a part of the air cleaner 24 is projected from an inner face of the side cover 15 to form the waterproof structure of the air cleaner 24 of the motorcycle. As the rib 31 covering at least a part of the air cleaner 24 is projected from the inner face of the side cover, the water is prevented from directly splashing on the air cleaner 24 in washing the motorcycle and the like, or the water reflected by each part is prevented from splashing on the neighborhood of a suction port of the air cleaner 24, whereby the intrusion of the water into the air cleaner 24 can be prevented, and high water-proofing of the air cleaner 24 can be secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air cleaner waterproof structure for a motorcycle in which an air cleaner is arranged in a space below a seat surrounded by side covers.

[0002]

2. Description of the Related Art A motorcycle is provided with an air cleaner for purifying fresh air supplied to an engine as a drive source. However, in a small motorcycle or the like, a space below a seat surrounded by a side cover surrounds the air cleaner. In some cases, a configuration of arranging in is adopted.

[0003]

However, in a motorcycle in which an air cleaner is arranged in the space below the seat surrounded by the side covers, water intrudes into the air cleaner from the suction port during rain or washing. There arises a problem of causing various problems.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an air cleaner waterproof structure for a motorcycle capable of reliably preventing water from entering the air cleaner.

[0005]

In order to achieve the above object, the invention according to claim 1 is a motorcycle comprising an air cleaner arranged in a space below a seat surrounded by a side cover, wherein an inner surface of the side cover is provided. A rib covering at least a part of the air cleaner is provided on the inner surface of the side cover so as to form an air cleaner waterproof structure.

A second aspect of the present invention is characterized in that, in the first aspect of the invention, a flat plate-like flexible flap made of an elastic body is attached to the rib.

Therefore, according to the first aspect of the present invention, the rib covering at least a part of the air cleaner is provided on the inner surface of the side cover so that the air cleaner is not directly splashed with water at the time of washing the vehicle. Since the water reflected by is not splashed in the vicinity of the intake port of the air cleaner, intrusion of water into the air cleaner is reliably prevented, and the air cleaner is highly waterproof.

According to the second aspect of the present invention, for example, even if the air cleaner is movable together with the engine unit, the gap between the flexible flap and the air cleaner can be closed while avoiding the interference between the air cleaner and the ribs. The waterproofness of the air cleaner can be further enhanced.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view of a motorcycle equipped with an air cleaner waterproof structure according to the present invention, and FIG. 2 is a side view of the essential portion of the motorcycle.

The motorcycle 1 according to this embodiment is shown in FIG.
As shown in FIG. 3, a head pipe 2 is provided on the front upper part of the vehicle body, and a steering shaft (not shown) is rotatably inserted in the head pipe 2. As shown in FIG. 1, a steering wheel 3 is attached to the upper end of the steering shaft, and a front fork 4 is attached to the lower end of the steering shaft.
The front wheel 5 is rotatably supported by the front axle 6 at the lower end of the front fork 4.
The front portion of the vehicle body is covered with a resin front cover 7.

Further, as shown in FIG. 2, a front frame 8 is extended obliquely downward from the head pipe 2 toward the rear of the vehicle body, and a pair of left and right sides is provided from the end of the front frame 8. The main frame 9 extends substantially horizontally toward the rear of the vehicle body, and the pair of left and right down tubes 1 are also provided.
0 extends substantially vertically downward. Then, each down tube 10 is bent at a substantially right angle midway and extends rearward of the vehicle body,
The rear end and the rear end of the main frame 9 are connected by a pair of left and right rear arm brackets 11.

A pair of left and right seat rails 12 extend obliquely upward toward the rear of the vehicle body from the upper portion of the rear arm bracket 11, and their rear ends are connected by a seat handle 13. Then, on the pair of left and right seat rails 12, seats 14 that are long in the vehicle front-rear direction are provided.
In the space surrounded by the resin side cover 15 below the seat 14, a storage box 16 and a fuel tank 17 each having an open upper surface are installed in front of and behind the vehicle body. It should be noted that the seat 14 is opened and closed by pivoting in the vertical direction about a hinge shaft 18 at the front end thereof, and with this opened, a helmet is put in and taken out of the storage box 16, or the fuel tank 17 is opened.
Is refueled.

On the other hand, as shown in FIG. 2, a front end portion of a unit swing type engine 19 is supported by a pivot shaft 20 so as to be vertically swingable below the pair of left and right rear arm brackets 11. The unit swing type engine 19 is configured as a unit by integrating a four-cycle engine as a drive source and a power transmission mechanism, and a rear portion thereof is suspended by the seat rail 12 via a rear cushion 21 and a rear end portion thereof. A rotatable rear wheel 23 is attached to a rear axle 22 as an output shaft that projects laterally from the rear axle 22.

An air cleaner 24 is attached to a space surrounded by the side cover 15 at the front end of the unit swing type engine 19, and the intake pipe 25 extending upward from the upper portion of the air cleaner 24 is in the middle. Is bent at a substantially right angle and extends rearward of the vehicle body, and its end is connected to an intake system (intake passage formed in the cylinder head) of a 4-cycle engine, and a carburetor 26 is connected in the middle thereof. In FIG. 2, 27 is a battery, 28 is a pair of left and right footboards,
Reference numeral 29 is a pair of left and right footrests.

Thus, the motorcycle 1 having the above structure
In the above, when the four-cycle engine of the unit swing type engine 19 is started, the negative pressure generated in the engine pulls the fresh air and the fresh air is sucked into the air cleaner 24 to be purified. The fuel is injected by the carburetor 26 while flowing through the air, thereby forming an air-fuel mixture having a predetermined air-fuel ratio.

The air-fuel mixture is supplied from the intake pipe to the four-cycle engine for combustion in a combustion chamber (not shown), and the exhaust gas generated by the combustion of the air-fuel mixture includes an exhaust pipe (not shown) and an exhaust muffler. Although it is discharged to the atmosphere through the engine, the rotational power of the continuously operated four-cycle engine is transmitted to the rear axle 22 via a power transmission mechanism (not shown), and the rear axle 22 and the rear wheels 23 attached to the rear axle 22. The motorcycle 1 is driven by being driven to rotate.

Next, the air cleaner 24 according to the present invention.
The waterproof structure will be described with reference to FIGS. Incidentally, FIG.
Is a perspective view of an air cleaner portion of a motorcycle showing an air cleaner waterproof structure according to the present invention, FIG. 4 is a left side view of the same, and FIG.
Is a plan view and FIG. 6 is a front view.

The air cleaner 24 is constructed by detachably accommodating a cleaner element (not shown) in a case formed of resin in the shape of a rectangular box. The left side surface of the cleaner element is as shown in FIG. A rectangular air intake port 24a is formed in the air intake port 24a.
5 is open toward the inner surface. Further, as shown in FIG. 6, a drain pipe 30 is connected to the lower portion of the air cleaner 24.

Thus, in the present embodiment, the rib 31 that partially covers the air cleaner 24 is integrally provided on the inner surface of the left side cover 15 so as to project. The rib 31 includes a stepwise rib 31A that extends in the vertical direction and covers a part of the front end surface of the air cleaner 24, and a rib 31B that extends substantially horizontally in the front-rear direction of the vehicle body and covers a part of the upper surface of the air cleaner 24. A flat rubber flapper 32 is bonded to the upper surface of the rib 31B that covers a part of the upper surface of the air cleaner 24.

As shown in FIG. 6, the rubber flapper 32 projects substantially horizontally from the rib 31B in the direction of the air cleaner 24. This projection is flexibly deformable, and the air cleaner 24 is seen in a plan view. Overlaps with a part of.

As described above, in the waterproof structure of the air cleaner 24 according to the present invention, the rib 31 covering a part of the air cleaner 24 is provided on the inner surface of the left side cover 15 facing the intake port 24a of the air cleaner 24. The action of the ribs 31 prevents water from directly splashing on the air cleaner 24 when washing the vehicle, and the water reflected at each part does not splash on the vicinity of the suction port 24a of the air cleaner 24, so that the infiltration of water into the air cleaner 24 is prevented. The air cleaner 24 is reliably prevented, and the air cleaner 24 is highly waterproof.

Further, in the motorcycle 1 according to this embodiment, the air cleaner 24 is the unit swing type engine 1
9, the air cleaner 24 swings up and down together with the unit swing type engine 19, but the rib 31 is formed at a position avoiding interference with the air cleaner 24 and protrudes from the rib 31B of the rubber flap 32. Since the flexible portion is overlapped with the air cleaner 24 in a plan view, the rubber flap 32 can more reliably prevent water from entering the air cleaner 24. Even if the air cleaner 24 interferes with the protruding portion (flexible portion) of the rubber flap 32, the protruding portion of the rubber flap 24 is only flexibly deformed, and a large external force is not applied to the air cleaner 24. It is possible to close the gap between the flap 32 and the air cleaner 24, which also makes it possible to further improve the waterproofness of the air cleaner 24.

[0024]

As is apparent from the above description, according to the present invention, in a motorcycle having an air cleaner arranged in a space below a seat surrounded by side covers, a rib covering at least a part of the air cleaner is provided. Since the air cleaner waterproof structure is formed by projecting on the inner surface of the side cover, it is possible to reliably prevent water from entering the air cleaner and ensure high waterproofness of the air cleaner.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle including an air cleaner waterproof structure according to the present invention.

FIG. 2 is a side view of a main part of a motorcycle including the waterproof structure for an air cleaner according to the present invention.

FIG. 3 is a perspective view of an air cleaner portion of a motorcycle showing an air cleaner waterproof structure according to the present invention.

FIG. 4 is a left side view of the air cleaner portion of the motorcycle showing the waterproof structure of the air cleaner according to the present invention.

FIG. 5 is a plan view of an air cleaner portion of a motorcycle showing an air cleaner waterproof structure according to the present invention.

FIG. 6 is a front view of an air cleaner portion of a motorcycle showing an air cleaner waterproof structure according to the present invention.

[Explanation of symbols]

1 motorcycle 14 sheets 15 Side cover 24 air cleaner 31 ribs 32 Rubber flap (flexible flap)

Claims (2)

[Claims] 1. A motorcycle in which an air cleaner is arranged in a space below a seat surrounded by a side cover, wherein a rib covering at least a part of the air cleaner is provided so as to project from an inner surface of the side cover. Waterproof structure for motorcycle air cleaner. 2. The air cleaner waterproof structure for a motorcycle according to claim 1, wherein a flat plate-shaped flexible flap made of an elastic body is attached to the rib.