JPS6345428Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a protection device for preventing muddy water, dirt, etc. from entering an air cleaner attached to an internal combustion engine of a motorcycle.

Air cleaners for motorcycles are generally placed behind the internal combustion engine and under the seat to prevent direct contact with muddy water and dirt, and an intake duct is provided on the top surface of the air cleaner case. Furthermore, if the intake port is directed toward the front of the vehicle body, the air cleaner element will become more contaminated due to dynamic pressure, so normally the intake port is directed toward the rear, and air is taken in using the intake negative pressure of the internal combustion engine.

However, in the case of a motocross bike as shown in Fig. 1, in order to make the car body lighter, only the rear fender 2 is attached to the rear end of the seat rail 1, and a part 31' (shown in Fig. 3) of the bottom plate 31 of the seat 3 is attached to the rear end of the seat rail 1. Since the rear surface 41 (shown in the third figure) of the air cleaner case 4 also serves as the front half of the rear fender, muddy water and dirt thrown up by the rear wheels 5 pass through the gap between the seat bottom plate 31 and the air cleaner case 4 and reach the intake port. It may invade.

Some of the above-mentioned types of motocross cars are equipped with a wall-shaped shielding plate hanging down from the seat rail or seat bottom plate behind the intake port to prevent muddy water and dirt from being sucked into the air cleaner, but the shielding plate and the air cleaner case are in close contact with each other. There is a risk of muddy water or dirt getting in through the gaps.

The purpose of this invention is to solve the above-mentioned problems of conventional air cleaners for motorcycles. In a motorcycle in which the inlet 61 of the intake duct 6 provided on the top surface of the case 4 of the air cleaner A is directed toward the rear of the vehicle body, a screen 7 is integrated in the left and right direction on the top surface of the air cleaner case 4 behind the intake duct 6. A lower part of an elastic shielding plate 8 having approximately the same width as the screen 7 is superimposed on the rear surface of the screen 7, and a presser plate 9 is further stacked on top of the lower part of the elastic shielding plate 8, and the screen 7, elastic shielding plate 8, and presser plate 9 are attached with rivets 10. It will stick. The upper part of the elastic shielding plate 8 is bent (forward in the figure) and sandwiched between the cross member (horizontal beam) 11 of the seat rails 1, 1 and the seat bottom plate 31.

The air cleaner case 4 has its upper and lower parts screwed to brackets 13 provided on the seat rails 1, 1 and the rear stay 12, respectively. The inside of the air cleaner case 4 is divided into two chambers, front and rear, by a partition wall 42, and the front chamber 43 is connected to the carburetor 1 by a hose 14.
5. The rear chamber 44 communicates with the outside through an intake duct 6. The air cleaner element 45 is of a cylindrical urethane foam type and is detachably supported by the partition wall 42 . When the lid 46 on the side of the case is opened and the presser cam 47 is loosened, the element 45 is removed from the partition wall 42. 16 is the rear suspension.

As described above, in the present invention, the lower part of the shielding plate 8 is superimposed and fixed to the screen 7 that is integrated with the air cleaner case 4,
Since the upper part is sandwiched between the cross member 11 of the seat rails 1, 1 and the seat bottom plate 31, there is no gap between the top and bottom of the shield plate 8, and the muddy water and dirt thrown up by the rear wheels 5 are swept away by the screen 7 and the shield plate 8. This prevents the air from entering the air intake port 61 of the air cleaner due to obstruction.

The shielding plate 8 is superimposed on the rear surface of the screen 7, that is, on the rear wheel side, and is made of an elastic material such as a rubber plate, so it corresponds to a relatively thin screen 7 that is molded integrally with the air cleaner case 4 from synthetic resin or the like. It also has the effect of absorbing impacts from pebbles and the like and preventing damage to the screen 7.

Furthermore, since the upper part of the shielding plate 8 is simply bent and sandwiched between the cross member 11 and the seat bottom plate 31, no parts are required for fixing, and the work is simple. Further, since variations in the mounting position of the air cleaner case 4 with respect to the seat rails 1, 1 and the rear stay 12 can be absorbed, the effect of preventing muddy water, dirt, etc. from entering the intake port 61 is reliable.

[Brief explanation of drawings]

FIG. 1 is a side view of the motorcycle, FIG. 2 is a vertical sectional side view of an air cleaner equipped with the device of the present invention, and FIG. 3 is a plan view of the same. 1 is an air cleaner, 1 is a seat rail, 2 is a rear fender, 3 is a seat, 31 is a seat bottom plate, 4
is an air cleaner case, 45 is an air cleaner element, 46 is a lid, 5 is a rear wheel, 6 is an intake duct, 61 is an intake port, 7 is a screen, 8 is an elastic shielding plate,
9 is a presser plate, and 11 is a cross member.

Claims (1)

[Scope of utility model registration request] In a motorcycle where the air cleaner is placed under the pair of left and right seat rails on which the seat is placed and fixed, and the entrance of the intake duct provided on the top surface of the air cleaner case faces toward the rear of the vehicle body, the air cleaner case is placed behind the intake duct. A screen is provided on the top surface,
This air cleaner protection device for a motorcycle has a lower part of an elastic shielding plate superposed and fixed to the rear surface of the screen, and an upper part of the elastic shielding plate is sandwiched and fixed between the bottom plate of the seat and the cross member of the seat rail.