JPH07112830B2 - Intake structure of saddle riding type vehicle for running on rough terrain - Google Patents

Description

The present invention relates to an intake structure for a saddle riding type vehicle for running on uneven terrain,
In particular, it relates to improvement of its waterproofness.

[Conventional technology]

Generally, a saddle-ride type vehicle for running on uneven terrain has an air cleaner main body disposed approximately in the center of the vehicle body in the front-rear direction, a fuel tank is mounted on the upper front portion of the vehicle body frame with a tank cover, and the fuel tank is installed behind the tank cover. It is configured with a saddle type seat. Since this type of vehicle may be used for running in water such that the wheels are submerged in water, for example, it is desirable to prevent water from entering the air cleaner main body and improve waterproofness.

As an air intake structure capable of improving the waterproof property, conventionally, in order to open an outside air introduction pipe for introducing outside air into the air cleaner main body at a high place of the vehicle, for example, the outside air introduction pipe is connected to a steering shaft and a steering handle. There is a structure that extends near the part and opens at that position. However, although this conventional structure can raise the opening position of the outside air introduction pipe, it has a problem that the intake resistance becomes large because the pipe length becomes long.

Therefore, the applicant of the present application has already patented a structure in which the outside air introduction pipe is opened in the space between the rear wall of the fuel tank and the rear wall of the tank cover as an intake structure that can raise the opening position without increasing the intake resistance. I am applying.

[Problems to be solved by the invention]

In the structure in which the fuel tank and the tank cover are opened, the opening position can be increased while the intake resistance is reduced, so that the waterproofness can be improved accordingly. However, in this structure, when water enters from the upper side along the surface of the fuel tank or the tank cover during heavy rain, for example, this may enter the outside air introduction pipe.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems, to increase the opening position while keeping the intake resistance small, and also to prevent the intrusion of water droplets that have propagated along the surface of the tank cover, thereby improving the waterproof property. It is a point to provide an intake structure of a saddle type vehicle for traveling on rough terrain that can be improved.

[Means for solving problems]

According to the present invention, an air cleaner main body is arranged substantially in the center in the front-rear direction of a vehicle body frame, a fuel tank is mounted on the upper front portion of the vehicle body frame, and a saddle type seat is provided behind the fuel tank to prevent rainwater and the like from entering from above. In an intake structure for introducing outside air into the air cleaner main body of a saddle riding type vehicle for running on uneven terrain equipped with a function of suppressing, an outside air introduction pipe is connected to the air cleaner main body, and an opening of the outside air introduction pipe is It is located near the tank rear wall in the space between the fuel tank rear wall and the seat front, and an umbrella portion that covers the opening is provided above the opening, and the umbrella portion extends along the fuel tank rear wall. Such as a front wall portion which slopes downward and rearward, and a rear wall portion which slopes upward and rearward following the front wall portion, rainwater and the like that have entered from between the tank and the seat are directed to the outside of the opening. With a gutter to let out It is characterized in that was.

[Action]

In the intake structure of the saddle riding type vehicle for traveling on an uneven terrain according to the present invention,
Since the opening of the outside air introduction pipe is close to the air cleaner body and is located in the space between the tank cover and the seat, which is located at a high place in the whole vehicle, the intake resistance from below does not increase. Water resistance to water can be improved. Further, water droplets or the like that have entered along the surface of the tank cover or the like from above are guided to the outside of the opening by the gutter portion of the umbrella portion and fall from there, and this water hardly enters the air cleaner main body. Therefore, the air intake structure of the present invention can reliably block not only water from below but also water from above, and the waterproofness can be further improved.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 4 are views for explaining an intake structure according to an embodiment of the present invention. In the figure, reference numeral 1 is a saddle-ride type vehicle for traveling on an uneven terrain to which the present embodiment is applied.
The body frame 2 is a double cradle type in which a pair of left and right cradle-shaped side pipes 2a are connected by a cross pipe 2b, and a seat rail 2c is connected to this.

A rear arm having a front wheel 12 at the front part of the body frame 2 via a front wheel suspension device 11 and a rear wheel suspension device 9 at the rear part.
The rear wheels 10 are attached via 9a, and the front wheels 1
2, a front fender device 16 and a rear fender device 15 are mounted above the rear wheel 15, respectively. Also, the body frame 2
A radiator 20, a steering shaft 13 to which a steering handle 14 is fixed, a fuel tank 7, and a saddle type seat 8 are sequentially mounted on the upper part of the vehicle. A bracket 2d is installed in the vehicle width direction near the fuel tank 7 of the body frame 2 and the seat 8. The bracket 2d has a gate-like shape, and a concave portion 2e having a concave shape is formed on the upper surface of the bracket 2d on the rear side of the vehicle. The supporting portions 8a are respectively supported.

The left, right and rear surfaces of the fuel tank 7 are covered with a tank cover 17. The tank cover 17 is of a two-part type including left and right side covers 18 and 18 that extend rearward following a radiator cover 21 that covers the radiator 20. A curved portion 18a having a semicircular surface shape and an opening at the lower end is formed.
The left and right side covers 18 are integrally formed by stacking the rear end portion and the curved portion 18a and fixing them with rivets 18b, and the left and right curved portions 18a form a bowl-shaped umbrella portion. 17a is configured. The umbrella portion 17a covers the upper part of the recess 2e of the gate-shaped bracket 2d.

Further, the umbrella portion 17a is a trough portion 17b composed of a front wall portion 18c which is inclined rearward and downward along the tank rear wall, and a rear wall portion 18d which is inclined slightly rearward and upward following the front wall portion 18c. have.

Further, a water-cooled two-cycle two-cylinder engine 3 is mounted substantially in the center of the vehicle body frame 2. An exhaust pipe 6 is connected to the exhaust side of the engine 3, and the exhaust pipe 6 extends to the rear of the vehicle through the left and right sides of the rear vehicle, which is led to the front of the engine 3. The left and right carburetors 4 on the intake side
And the carburetor 4 is connected to the air cleaner body 5 via the left and right connecting pipes 5a. An outside air introduction pipe 5b for introducing outside air into the air cleaner body 5 is connected to the center of the air cleaner body 5 in the vehicle width direction and above the connecting pipe 5a. The outside air introducing pipe 5b is bent forward and upward of the vehicle through the lower side of the bracket 2d, and the opening 5c portion thereof is a recess of the bracket 2d.
It is located above 2e and within the umbrella portion 17a.

Next, the function and effect of this embodiment will be described.

In the vehicle 1 of this embodiment, the combustion air is introduced into the air cleaner main body 5 from the outside air introduction pipe 5b, filtered there, and then sucked into the engine 3 through the connecting pipe 5a and the carburetor 4. When the vehicle 1 travels at a water depth such that the wheels 10 and 12 are submerged in water, the outside air introduction pipe 5b is opened at a high place between the seat 8 and the tank cover 7 as a whole when viewed from the vehicle. The water splashed up from below hardly enters the opening 5c of the outside air introduction pipe 5b. Further, since the bracket 2d functions as a waterproof cover against water coming from below, water is prevented from entering the opening 5c from this point as well.

The above water such as jumping water or rainwater may enter below from between the fuel tank 7 and the tank cover 17 or between the cover 17 and the seat 8.
In this embodiment, the inflow water is guided to the outside of the opening 5c of the outside air introduction pipe 5b along the outer surface of the trough 17b of the umbrella portion 17a of the tank cover 17, and falls downward from here. Therefore, the entering water hardly enters the opening 5c of the outside air introducing pipe 5b.

As described above, in the present embodiment, the opening 5c of the outside air introduction pipe 5b is located in a high space between the tank cover 17 and the seat 8, and the opening 5c is integrally formed with the tank cover 17 to form the umbrella portion 17a. Since the umbrella portion 17a is covered with a gutter portion 17b including a front wall portion 18c and a rear wall portion 18d,
Not only water from below but also water from above can be reliably prevented from entering the outside air introduction pipe 5b, and the waterproof property can be improved. In this case, since the umbrella portion 17a is formed integrally with the side cover 18, provision of the umbrella portion 17a does not increase the number of parts and the number of assembling steps. Furthermore, since the outside air introduction pipe 5b is open to the space near the air cleaner body 5, its length can be short and the intake resistance does not increase.

In the above embodiment, the case where the umbrella portion 17a is formed by combining the left and right curved portions 18a has been described.
Of course, the left and right sides of this umbrella portion may be integrally formed. Further, the shape of the umbrella portion does not necessarily have to be the bowl shape as in the above-described embodiment, and the point is that the shape covers the opening of the outside air introduction tube.

〔The invention's effect〕

As described above, according to the intake structure of the saddle riding type vehicle for running on uneven terrain according to the present invention, the opening of the outside air introduction pipe is located in the space between the tank cover and the seat, and the umbrella portion that covers the opening is provided. Since it has a gutter consisting of the front wall and the rear wall, the opening position can be raised while keeping the intake resistance small, and the water that has entered through the surface of the tank cover etc. can also enter the opening. There is an effect that it can be prevented and the waterproofness can be greatly improved.

[Brief description of drawings]

1 to 4 are views for explaining an intake structure according to an embodiment of the present invention. FIG. 1 is a side view of an outside air introducing pipe portion thereof, FIG. 2 is a plan view thereof, and FIG. FIG. 4 is a side view of a saddle-ride type vehicle for running on uneven terrain to which the above embodiment is applied, and FIG. 4 is a plan view thereof. In the figure, 1 is a saddle riding type vehicle for running on uneven terrain, 2 is a vehicle body frame, 5 is an air cleaner main body, 5b is an outside air introducing pipe, 5c is an opening, 7 is a fuel tank, 8 is a saddle type seat, and 17 is a tank cover. , 17a is an umbrella section.

Claims (1)

[Claims] 1. An air cleaner body is arranged substantially in the center of the front and rear direction of a vehicle body frame, a fuel tank is mounted on the upper front portion of the vehicle body frame, and a saddle type seat is provided behind the fuel tank to intrude rainwater and the like from above. In an intake structure that introduces outside air into the air cleaner body of the saddle riding type vehicle for running on uneven terrain mounted with a function of suppressing the outside air introduction pipe is connected to the air cleaner body, the opening of the outside air introduction pipe The umbrella portion, which is located near the tank rear wall in the space between the fuel tank rear wall and the seat front portion and covers the opening, is provided above the opening, and the umbrella portion is provided on the fuel tank rear wall. The front wall portion is inclined rearward and downward along the front wall portion, and the rear wall portion is inclined rearward and upward after the front wall portion, and rainwater or the like that has entered between the fuel tank and the seat is exposed to the outside of the opening portion. It also has a gutter part to let out And to intake structure of a straddle-type vehicle all terrain, characterized in that the.