JPS6239993Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air cleaner device for an internal combustion engine for running a motorcycle, which has a leg shield attached to the front part of the vehicle body frame.

The air cleaner of an internal combustion engine for a motorcycle is exposed to the outside and attached to the vehicle body frame, so its air suction port may directly suck in the wind from the motorcycle while it is running, which may impair its suction effect. be.

Therefore, the main object of the present invention is to provide an air cleaner device that is not affected by the wind while driving and has significantly improved air suction efficiency.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.A leg shield 1 is provided at the front of a body frame F of a motorcycle to cover the front lower body of a driver sitting on a seat S of the frame F. It is installed so as to straddle the main pipe 2 of the frame F. Behind the leg shield 1, an internal combustion engine E for driving the motorcycle is mounted on the body frame F, and an air cleaner A connected to the intake system of the internal combustion engine E runs longitudinally between the leg shield 1 and the seat S. It is disposed in a dead space D formed below the main pipe 2 of F, and is suspended and supported by the main pipe 2.

The cleaner case 3 of the air cleaner A is constructed by integrally joining an upper case half 3a and a lower case half 3b, and a cleaner element 4 is housed in the cleaner case 3. The interior is divided into an upstream chamber 5 into which unpurified air flows and a downstream chamber 6 into which clean air that has passed through the cleaner element 4 flows.

In the upper case half 3a of the cleaner case 3,
As clearly shown in Figures 5 and 6, the air intake pipe 7,
7 are integrally extended upwardly in a fork shape with intervals left and right, and each air intake pipe 7 has two air intake passages 7a and 7b arranged in parallel and is formed in a cross-sectional shape of 8. There is. One air intake passage 7a of each air intake pipe 7 is formed slightly shorter than the other passage 7b, and a step is formed between the suction ports 8a and 8b. It is designed to be easy to inhale. The inner end of the air intake pipe 7 is
It communicates with an upstream chamber 5 inside the cleaner case 3. Also, the lower case half 3b of the cleaner case 3
A flexible air extraction pipe 9 is connected to the air extraction pipe 9, and the inner end of this air extraction pipe 9 communicates with the downstream chamber 6 in the cleaner case 3, and the outer end communicates with the internal combustion engine E via the carburetor 10. It is communicated with the intake pipe 11.

In the upper case half 3a of the cleaner case 3,
Mounting pieces 12, 1 are integrated with a pair of air intake pipes 7, 7.
2 is formed, and as shown in FIG. It is formed in 13.

The air cleaner A configured as described above is installed below the main pipe 2 running vertically between the leg shield 1 and the seat S.
The supporting structure will be explained below.The cylindrical concave surface 13 of the upper case half 3a is placed along the lower surface of the main pipe 2, and the pair of air introduction pipes 7, 7 and the mounting pieces 12, 12 integrated with it are attached to the main pipe 2.
Place the mounting pieces 1 on both sides of the
The air cleaner A is fixedly supported on the main pipe 2 by passing a mounting bolt 14 through the main pipe 2 and the main pipe 2.

The air intake passages 7a and 7b of the pair of air intake pipes 7 and 7 are located on the inner side facing the seat S of the leg shield 1, and as will be described later, the air intake passages 7a and 7b of the pair of air intake pipes 7 and 7 are located on the inner side facing the seat S of the leg shield 1, and as described later, they absorb the running wind generated when the motorcycle runs. It is designed not to be inhaled directly.

Above the main pipe 2, a cover body 15 made of an elastic material such as rubber is straddled and connected between the left and right air intake pipes 7, 7, and the cover body 15 is fastened together with the air cleaner A by the mounting bolts 14. Fixed.

By the way, as shown in FIGS. 2 and 3, the cover body 15 has air inlets 8a,
A shielding plate 15a extending vertically and a clamping piece 15b extending along the upper surface of the main pipe 2, which shields the front open end of the pipe 8b, are integrally formed, and the shielding plate 15a and clamping piece 15b are reinforced with rib pieces 15c. ing. When the motorcycle is running, the wind passing over the suction ports 8a and 8b is blocked by the shielding plate 15a, and the suction ports 8a and
8b is designed so that it does not directly suck in the running wind. Furthermore, the clamping piece 15b is connected to the wire harness 17 that runs over the main pipe 2, the cable 1
8. To clamp and protect cables such as the throttle cable 19 in cooperation with the main pipe 2 so that they do not move.

As shown in FIGS. 2 to 4, the leg shield 1
A part of the leg shield 1 extends to the rear side of the head pipe H of the vehicle body frame F so as to cover the left and right air intake pipes 7, 7 of the air cleaner A. A sealed air introduction chamber C is formed that surrounds the left and right air intake pipes 7, 7, and this air introduction chamber C is
Multiple flow ports 16 drilled in the leg shield 1
It communicates with the outside through.

Next, to explain the operation of the embodiment of the present invention, when the internal combustion engine is operated to drive the motorcycle, the intake negative pressure acts on the air cleaner A through the carburetor 10, and the outside air is As shown in FIG. 3, the air passes through the flow port 16, flows into the air inflow chamber C, and from there flows into the upstream chamber 5 of the cleaner case 3 through the left and right air intake pipes 7, 7. The unpurified air in the upstream chamber 5 passes through the cleaner element 4 and is purified, and then flows into the downstream chamber 6, from where it is passed through the air extraction pipe 9, the vaporizer 12, and the intake pipe 1.
1 into the combustion chamber of the internal combustion engine E.

By the way, the left and right air intake pipes 7 of air cleaner A
A shielding plate 15a of the cover body 15 extends substantially vertically in front of the suction ports 8a and 8b, and the wind generated when the motorcycle is running is blocked by the shielding plate 15a. , 8b, a sealed air introduction chamber C is formed by the leg shield 1 and the cover body 15, so that the suction ports 8a and 8b do not directly suck in the air flow, and the air introduction chamber C is always closed. The air flowing into the chamber C without any flow can be sucked in.

Furthermore, the clamping piece 15b of the cover body 15 cooperates with the main pipe 2, and the wire harness 17 and the cable 1 that extend over the main pipe 2 are connected to each other.
8, throttle cable 19, etc., are held so that they do not move, thereby preventing them from coming into contact with other objects.

As described above, according to the present invention, the air introduction pipe of the air cleaner suspended from the main pipe is formed into a hawk shape so as to hold the main pipe, and the cover body is attached to the hawk-shaped air introduction pipe on the main pipe. The cover body covers the open front of the air intake pipe's suction port, and also works with the leg shield to form a sealed air introduction chamber that covers the area around the suction port. By blocking the running wind when the motorcycle is running, static air flows into the air inflow chamber and is stored there, and this air can be sucked into the air cleaner through the air intake pipe, ensuring the constant suction effect of the air cleaner. can be achieved to ensure stable operation of the engine.

Furthermore, by integrally forming a clamping piece on the cover body, the cover body can cooperate with the main pipe to clamp cables such as wire harnesses, choke cables, throttle cables, etc. so that they do not move. It is possible to prevent these cables from coming into contact with other objects and protect them. Further, since a separate clamping member for the cable is not required, the number of parts can be reduced.

[Brief explanation of the drawing]

Fig. 1 is a side view of a motorcycle equipped with the device of the present invention, Fig. 2 is a partially cutaway enlarged view of the motorcycle, Fig. 3 is a vertical side view of the device of the present invention, and Fig. 4 is a side view of the motorcycle equipped with the device of the present invention.
A view taken along the line, FIG. 5 is a sectional view taken along the line shown in FIG.
FIG. 6 is a sectional view taken along the line of FIG. 3. A...Air cleaner, F...Vehicle frame, S
... Sheet, 1 ... Leg shield, 2 ... Main pipe, 7 ... Air intake pipe, 15 ... Cover body, 15a ... Shielding plate, 15b ... Clamping piece, 17
...Wire harness, 18...Chiyoke cable, 19...Throttle cable.

Claims (1)

[Scope of Claim for Utility Model Registration] In a motorcycle comprising a leg shield attached to the front part of a body frame to cover the front lower body of a driver sitting on a seat on the frame, the leg shield runs vertically between the leg shield and the seat. , an air cleaner is suspended from the main pipe of the vehicle body frame, an air intake pipe of the air cleaner is formed into a hawk shape so as to hold the main pipe, and a cover body is attached to the hawk-shaped air intake pipe on the main pipe. The cover body has a shielding plate that shields the open front side of the suction port of the air intake pipe, and also forms a sealed air introduction chamber that covers the periphery of the suction port in cooperation with the leg shield. An air cleaner device for an internal combustion engine for a motorcycle. In the air cleaner device for an internal combustion engine for a motorcycle as set forth in claim 1 of the utility model registration claim, the cover body is provided with a wire harness, a throttle cable, a choke cable, etc. in cooperation with the main pipe of the vehicle body frame. An air cleaner device for an internal combustion engine for a motorcycle, which is integrally formed with a clamping piece that can clamp a cable.