JPS6312074Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of a leg shield that is attached to the front part of a vehicle body frame, a leg shield body that covers the front lower body of a driver sitting on a seat on the body frame, and a leg shield body that covers the front of the lower body of a driver sitting on a seat on the body frame, and a leg shield that is attached to the rear surface of the leg shield body. The present invention relates to an air cleaner device for an internally-twisted engine for running in a motorcycle, which comprises a shield cover that is integrally installed and extends over a main pipe of the body frame from above.

Generally, in order to stabilize the output of the internal combustion engine and reduce suction noise, the air cleaner is designed to have as large a capacity as possible, and its suction port is not affected by the wind while the vehicle is running, thereby improving suction efficiency. Although it is desirable to improve the
Utilizing the dead space formed below the main pipe inside the shield cover of the LegShield, it is possible to use a relatively large capacity air cleaner, and the suction port is not affected by the wind while driving, improving suction efficiency. The main object of the present invention is to provide an air cleaner device for an internal combustion engine for a motorcycle, in which the support strength of the air cleaner by the main pipe is high.

In order to achieve the above object, the present invention provides a leg shield attached to the front part of a vehicle body frame, which includes a leg shield main body that covers the front lower body of a driver sitting on a seat on the vehicle body frame, and a rear surface of the leg shield main body. In a motorcycle comprising a shield cover that is integrally connected to a main pipe of the body frame and spans the main pipe of the body frame from above, the main pipe has a shield cover that is arranged inside the shield cover adjacent to a lower part of the pipe. A pair of left and right air intake pipes are installed on the upper surface of the air cleaner so as to sandwich the main pipe, and the intake ports of these air intake pipes are connected to the outside air that is provided in the shield cover. It is characterized by communicating with the atmosphere through an intake port.

An embodiment of the present invention will be described below with reference to the drawings. A leg shield 1 is mounted on the front part of a body frame F of a motorcycle so as to straddle a main pipe 2 of the body frame F. , a leg shield main body 1a that covers the front lower body of a driver sitting on a seat S on the vehicle body frame F, and a shield having a substantially inverted U-shaped cross section that is integrally connected to the rear surface of the main body 1a and straddles the main pipe 2 from above. It is composed of a cover 1b. Behind the leg shield 1, on the body frame F, there is an internal twisting engine E for running the motorcycle.
An air cleaner A mounted on the engine E and connected to the intake system of the internal combustion engine E is disposed in a dead space D formed below the main pipe 2 inside the shield cover 1b of the leg shield 1,
It is installed along the lower part of 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 of the cleaner case 3 is divided into an upstream chamber 5 into which uncleaned air flows, and a downstream chamber 6 into which clean air that has passed through the cleaner element 4 flows. As clearly shown in FIGS. 5 and 6, on the upper surface of the upper case half 3a of the cleaner case 3, there are a pair of left and right air intake pipes with a figure-8 cross section in which two air intake passages 7a and 7b are arranged in parallel. 7, 7 are integrally erected upward in the shape of a fork with an interval left and right, and the air intake passage 7a on one side of each air intake pipe 7 is connected to that on the other side 7b.
The suction ports 8a, 8 are formed slightly shorter than the
A step is formed in b so that air can be easily sucked in from either passage. An inner end of the air intake pipe 7 is communicated with an upstream chamber 5 inside the cleaner case 3. Further, a flexible air extraction pipe 9 is connected to the lower case half 3b of the cleaner case 3, and the inner end of this air extraction pipe 9 is communicated with the downstream chamber 6 inside the cleaner case 3, and the outer end thereof is connected to the lower case half 3b. is vaporizer 10
The intake pipe 11 of the internal combustion engine E is communicated with the intake pipe 11 of the internal combustion engine E.

In the upper case half 3a of the cleaner case 3,
The mounting piece 1 is integrated with the left and right pair of air intake pipes 7, 7.
2 and 12 are formed, and as shown in FIG. It is formed into a cylindrical concave surface 13.

The air cleaner A configured as described above is suspended and supported by the main pipe 2, and its support structure will be explained below. and a pair of air intake pipes 7, 7 and mounting pieces 12, 12 integral therewith.
are positioned on both sides of the main pipe 2 so as to straddle them, and a mounting bolt 14 is passed through and fixed across the mounting pieces 12, 12 and the main pipe 2 to fix and support the air cleaner A to 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 of the leg shield 1 facing the seat S, that is, on the shield cover 1b side, and as described later, It is designed to prevent direct intake of flowing air generated by the wind. 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 this cover body 15 is connected by the mounting bolts 14.
It is fastened together with the air cleaner A to the main pipe 2.

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 are integrally formed to shield the front open portion of the pipe 8b, and the shielding plate 15a and clamping piece 15b are reinforced with rib pieces 15c. has been done. When the motorcycle is running, the wind passing over the suction ports 8a and 8b is blocked by the shielding plate 15a, 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 shield cover 1
A part of b bulges upward so as to cover the left and right air intake pipes 7, 7 of the air cleaner A, and the bulge of this shield cover 1b and the cover body 15
A sealed air inflow chamber C is formed which surrounds the left and right air intake pipes 7, 7, and this air inflow chamber C includes a plurality of outside air intake ports 16 formed in the shield cover 1b. 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 negative pressure of the intake air acts on the air cleaner A through the carburetor 10, so that the outside air is As shown in the figure, the air passes through the outside air intake port 16 and flows into the air inflow chamber C, from which the left and right air intake pipes 7, 7
It flows into the upstream chamber 5 of the cleaner case 3 through the inside. The unpurified air in the upstream chamber 5 passes through the cleaner element 4 and is purified, then flows into the downstream chamber 6, from where it passes through the air extraction pipe 9, the carburetor 10, and the intake pipe 11 to the internal combustion engine. It flows into the twisting chamber of E.

By the way, the suction ports 8a and 8b of the air intake pipe 7 of the air cleaner A are connected to the air inlet chamber C through the outside air intake port 16 from the outside of the shield cover 1b, which is located behind the leg shield main body 1a and is hardly affected by the running wind. Since the air flowing into the motorcycle is sucked in, even when the motorcycle is running, flowing air caused by the running wind is hardly directly sucked in, and high suction efficiency can be obtained. Further, since a relatively large dead space D is formed below the main pipe 2 inside the shield cover 1b of the leg shield 1, the capacity of the air cleaner A disposed in this dead space D can be set relatively large.

As described above, according to the present invention, the leg shield attached to the front part of the vehicle body frame is integrated with the leg shield body that covers the front lower body of the driver sitting on the seat on the vehicle body frame, and the rear surface of the leg shield body. In a motorcycle comprising a shield cover that is connected to a main pipe of the body frame and straddles the main pipe of the body frame from above, the main pipe has a shield cover that is arranged inside the shield cover adjacent to a lower part of the pipe. Since the air cleaner is supported, a relatively large air cleaner can be easily installed along the head pipe in the dead space formed below the main pipe inside the shield cover of the leg shield.
In addition to stabilizing the output of the internal combustion engine and reducing air cleaner suction noise, the air cleaner can be protected by the main pipe and leg shield.

Furthermore, a pair of left and right air intake pipes are installed on the top surface of the air cleaner so as to sandwich the main pipe, and the suction ports of these air intake pipes are connected to the atmosphere through the outside air intake port drilled in the shield cover. Because of this, outside air can be introduced into each air intake pipe through the outside air intake port from the outside of the shield cover, which is located at the rear of the leg shield body and is hardly affected by the running wind. There is almost no influence from the running wind on the suction of air, which can contribute to improving the suction efficiency. In addition, the left and right air intake pipes cooperate with each other to narrow the main pipe, thereby restricting the air cleaner's movement in the left-right direction. Coupled with the controlling effect, the support strength of the air cleaner by the main pipe as a whole can be greatly increased. Furthermore, by providing a pair of left and right air intake pipes, the outer diameter of each individual air intake pipe can be made relatively small, so the amount of protrusion of these air intake pipes outward from the center of the main pipe can be suppressed as much as possible. Therefore, even if the upper part of the shield cover is formed to be relatively narrow, the air intake pipe and the main pipe can be arranged side by side in the inner space without any difficulty.

[Brief explanation of drawings]

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 thereof, Fig. 3 is a longitudinal side view of the device of the present invention, and Fig. 4 is a line taken from Fig. 2. 5 is a sectional view taken along the line of FIG. 3, and FIG. 6 is a sectional view taken along the line of FIG. 3. A...Air cleaner, F...Vehicle frame, S
... Sheet, 1 ... Leg shield, 1a ... Leg shield body, 1b ... Shield cover, 2
...Main pipe, 7...Air intake pipe, 8a, 8
b...Suction port, 16...Outside air intake port.

Claims (1)

[Scope of utility model registration request] A leg shield 1 attached to the front part of a vehicle body frame F is integrally connected to a leg shield body 1a that covers the front lower body of a driver sitting on a seat S on the vehicle body frame F, and a rear surface of this leg shield body 1a. In the motorcycle, the main pipe 2 includes a shield cover 1b that straddles the main pipe 2 of the body frame F from above. It supports the installed air cleaner A, and on the top surface of the air cleaner A,
A pair of left and right air intake pipes 7, 7 are installed vertically so as to sandwich the main pipe 2, and these air intake pipes 7, 7
The suction ports 8a, 8b are connected to the shield cover 1b.
An air cleaner device for an internal combustion engine for a motorcycle, characterized in that the air cleaner device communicates with the atmosphere through an outside air intake port 16 formed in the air cleaner.