JPH02158475A - Dust protective structure for scooter type vehicle - Google Patents

Abstract

PURPOSE:To prevent entrance of mud and dust to a power system by a method wherein a partition wall to reduce a gap between a foot board, arranged above an under cowl, and a power system is disposed therebetween, and a flap is disposed to the rear end part of an under cowl. CONSTITUTION:In a device in which a front fender 8, a leg shield 9, a front under cowl 10, a rear under cowl 11, and a side cover 12 are disposed, in order named, from the front of a car body in a manner to cover a car body frame 2 therewith, a power system, e.g. an engine 6, a fuel tank 17, and an air cleaner 18, is disposed. A laterally approximately horizontally partition wall 13b is integrally formed to the rear end of the foot board 13, and a gap between the foot board 13 and the engine 16 is reduced by means of the partition wall 13b. A rearwardly and downwardly protruding flap 10c is formed to the rear end of the under cowl 10.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a dustproof structure for a scooter type vehicle, and particularly for a vehicle in which a power system such as an engine or an air cleaner is disposed behind a footboard and an under cowl. The present invention relates to a dustproof structure for a scooter-type vehicle.

(Conventional technology) Near and low Scooter-type vehicles are required to have higher performance, and as part of this improvement, aerodynamics related to air resistance during driving and fashion trends due to the popularization of small scooter-type vehicles are being improved. Gender is becoming more important.

For this reason, scooter type vehicles are provided with a cover called a cowling.

This cover consists of several cover members, such as a front fender that covers the front of the vehicle, a leg shield that hides the driver's feet, an under cowl that is placed between the front and rear wheels, and a side cover that covers the area under the seat. It consists of

Some of these cover members are appropriately selected and attached to the scooter type vehicle depending on its purpose of use.

Furthermore, in scooter type vehicles, a footboard is disposed above the under cowl on which the driver's feet are placed while the vehicle is running.

Furthermore, in the case of a scooter type vehicle, a seat is disposed substantially above the rear wheels, and a power system such as an engine and an air cleaner is disposed between the seat and the rear wheels.

Conventionally, the front end of the under cowl has an opening for the air flow, and the under cowl and footboard form a duct-like flow path that allows the air flowing in from this inlet to flow efficiently toward the engine. are doing.

(Problem to be Solved by the Invention) Incidentally, in scooter type vehicles, the engine is disposed behind the footboard or under cowl, so
A gap of a certain size is formed between the rear end of the footboard or under cowl and the engine.

However, if a gap is formed between the footboard and the engine, the wind flowing in from the inlet while the vehicle is running will flow forcefully toward the engine through the duct-like flow path. Furthermore, even when no inlet is provided, the wind flowing along the underside of the under cowl flows toward the engine. Since the wind is mixed with foreign matter such as mud and dust, these foreign matters flow towards the engine along with the wind, and then flow towards the power system through the gap between the under cowl and the engine.

For this reason, when air is sucked into the air cleaner, these foreign substances are also sucked in, making it impossible for the air cleaner to fully exhibit its dustproof function.

Therefore, in conventional scooter type vehicles, a protruding wall is often provided on the lower surface of the footboard to prevent foreign objects from entering the area under the seat where the engine is disposed. However, some foreign objects can cross this wall and enter around the bottom of the seat, and since various components such as frames are installed below the footboard, it is difficult to allow the wall to protrude downward that much. I can't let you. For this reason, conventionally it has not been possible to sufficiently prevent the intrusion of foreign matter.

The present invention was made in view of these circumstances, and its purpose is to reliably prevent mud and dust from entering around the power system installed behind the footboard and under cowl. It is an object of the present invention to provide a dust-proof structure for a scooter type vehicle that can prevent dust.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a scooter-type vehicle with a structure that connects the footboard and the power system such as the engine, fuel tank, and air cleaner. It is characterized in that a partition wall is provided to reduce the gap, and a flap that protrudes rearward and downward is formed at the rear end of the under cowl.

(Function) According to the dustproof structure of the scooter type vehicle of the present invention having such a configuration, the traveling wind flowing below the under cowl is guided by the flap formed on the under cowl at the rear end of the under cowl. It then turns backwards and downwards and begins to flow. In other words, the wind flows away from the gap between the rear end of the under cowl and the engine.

Further, foreign matter that attempts to flow beyond the flap into the power system from the gap is prevented from flowing in by the partition wall. As a result, foreign objects will not be able to enter the power system.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 is a side view of a scooter type vehicle to which an embodiment of the present invention is applied, and FIG. 2 is a plan view of the vehicle with some parts removed.

As shown in FIGS. 1 and 2, the scooter type vehicle 1 includes a frame 2 extending in the longitudinal direction of the vehicle body, and a steering shaft 3 is rotatably supported on a head pipe 2a at the front end of the frame 2. ing. A front wheel 5 is connected to the lower end of the steering shaft 3 via a front suspension 4. On the other hand, a rear wheel 7 is connected to the rear end of the frame 2 via a rear suspension 6.

Further, a front fender 8, a leg shield 9, a front under cowl 1o, a rear under cowl 11, and a side cover 12 are arranged to cover the frame 2 in order from the front of the vehicle body. The front fender 8, the leg shield 9, and the front under cowl 1o each extend over both left and right sides of the vehicle body and are formed of a single member. On the other hand, the rear under cowl 11 and the side covers 12 are formed from separate members for the left and right sides, and have a shape with left and right sides opposite to each other.

Furthermore, a footboard 13 is disposed on the upper surface of the front and rear under cowls 10 and 11 between the leg shield 9 and the side cover 12. A tail lamp assembly 14 is disposed at the rear end of the side cover 12, and
A sheet 15 is provided at the upper end of the side cover 12.

A power system including an engine 16, a fuel tank 17, an air cleaner 18, and the like is disposed below the seat 15 and behind the footboard 13 and the front under cowl 1o. Gaps A and B of a certain size are formed between the rear end of the footboard 13 and the rear end of the front under cowl 10 and the engine 16, respectively.

On the other hand, a running air inlet 19 is provided at the front end of the front under cowl 1o. Further, as shown in FIG. 3, the front under cowl 10 is formed into a U-shaped cross section by a bottom surface 10a and side surfaces 10b, 10b which are erected upward at both left and right ends of the bottom surface 10a. . This bottom surface 1°a substantially covers the lower part of the vehicle body between the front wheels 5 and the rear wheels 7. The front under cowl 10 and the footboard 13 form a space 20 having a substantially rectangular cross section. The front end of this space 2o is the inlet 1
The rear end of the space 2° is open toward the engine 16.

Furthermore, as shown in FIG.
It is attached to e with a screw. As is clear from FIGS. 2 and 4, a retaining portion 13a is formed at the rear end of the footboard 13 and is connected to the front lower end of the side cover 12. A partition wall 13b extending substantially horizontally is formed integrally with the footboard 13, and this partition wall 13b is one step higher than the engaging portion 13a. The gap A between the footboard 13 and the engine 16 is reduced by the partition wall 13b. Although not shown in the drawings, wiring for an electrical system or the like is arranged in this gap A. Therefore, the gap A is extremely small.

Furthermore, as shown in FIG. 1, a flap 10c is provided at the rear end of the front under cowl 10. As is clear from FIG. 5, this flap 10c is attached to the bottom surface 10. It is integrally formed so as to protrude rearward and downward from the rear end of a. Further, as is clear from FIGS. 2 and 3, the flap 10c is formed with a predetermined width in one direction from the center of the vehicle body to the left and right. Therefore, the flap 10C is provided so as to slightly close the gap B between the bottom surface 10a of the front under cowl 10 and the engine. That is, the front under cowl 10 constitutes the under cowl of the present invention.

On the other hand, as shown in FIGS. 6 and 7, the air cleaner 18 is formed with an air intake port 18a facing toward the front of the vehicle body at an upper position inside the vehicle body, and further extends from this air intake port 18a toward the rear of the vehicle body. An airflow passage 18b is arranged facing toward the front. Further, an air exhaust port 18c connected to the carburetor 21 is formed below the air intake port 18a.

An eave-shaped wall 18d is provided from the front of the air intake port 18a upwardly so as to cover the air intake port 18a. Further, the air intake port 18a is provided with a flange-shaped vertical wall 18e)4 Air intake port 18
A horizontal wall 18f is provided directly below a. By these eave-like walls 18d, vertical walls 18e, and horizontal walls 18f,
An air guide path is formed that faces inside the vehicle body and guides air to the air intake port 18a.

+ The air sucked in from the air intake port 18a flows into the air cleaner through the air flow passage 18b, and dust and dust mixed in the air are removed by a filter (not shown) disposed inside the air cleaner. It is now possible to The clean air flows to the carburetor 21 from the air outlet 18c.

A stand 22 is attached to the frame 2 approximately midway between the front wheel 5 and the rear wheel 7 via a bracket 22f.

Next, the operation of this embodiment will be explained.

When the scooter type vehicle 1 is running, a portion of the running wind flows into the space 20 from the inlet 19 of the front under cowl 10. The air flowing into the space 20 flows through the space 20 toward the rear engine 16 as indicated by arrow a. Therefore, a duct-like flow path is formed by the footboard 13 and the front under cowl 10. Through this flow path, the air is rectified and efficiently and forcefully flows out from the rear end of the space 20.
= collides with 6.

The running wind that hits the engine 16 attempts to flow further toward the fuel tank 17 and air cleaner 18 through the gap A.

However, as shown in FIGS. 1 and 4, part of the wind from the vehicle collides with the bulkhead 13b as shown by the arrow mark and attempts to change the direction of the flow downward, so it flows toward the fuel tank and air cleaner 18. It doesn't seem to flow that fast. Furthermore, since the gap A is reduced by the partition wall and the wiring, it is more effective. At this time, foreign matter such as mud and dust mixed in the traveling wind also collides with the partition wall 13b. Then, the foreign matter that collides with the partition wall 13b loses its momentum and falls almost downward, similar to the traveling wind whose flow direction changes in the direction of the arrow. Therefore, almost no foreign matter enters the fuel tank 17 or air cleaner 18. As a result, the dustproof efficiency of the air cleaner 18 is improved, and the area around the cap of the fuel tank 17 is effectively dustproofed.

As shown in FIGS. 1 and 5, the wind flowing under the front under 12 = one cowl 10 is guided by the flap 10c and flows backward and downward as shown by arrow C, that is, away from gap B.・Flap 10
The traveling wind whose direction is changed by c, that is, mud and dust, hardly ever enters the engine 16 through the gap B. Further, mud and dust that cannot be blocked by this flap are blocked by the partition wall 13b.

Therefore, mud and dust are prevented from entering the fuel tank 17 and the air cleaner 18.
7 and the air cleaner 18 can be further effectively prevented from dust.

Further, in the air cleaner 18, as shown by the arrow d in FIG. 6, air is guided from the inside of the vehicle body to the air intake port 18a by the aforementioned air guide path. Therefore, the front of the vehicle body, where dirt and dust can easily enter,
Since air is no longer sucked into the air cleaner 18 from outside the vehicle body, above the vehicle body, and from below the vehicle body, the dustproof performance of the air cleaner 18 is further improved.

On the other hand, since the fuel tank 17 is almost never covered with foreign matter such as mud or dust, even if the cap is removed when refueling, foreign matter is prevented from entering the tank 17 and mixing with the fuel. .

In addition, in the above-mentioned embodiment, the partition wall 13b is formed integrally with the footboard 13 as a single member, but the present invention is not limited to this, and the partition wall 13b
can also be formed separately from the footboard 13.

In that case, the partition wall 13b formed separately is connected to the footboard 1.
Instead of being attached to the frame 2, it may be attached to another member such as the frame 2.

Further, in the above-mentioned embodiment, the flap 10c is formed integrally with the front under cowl 10 as a single member, but the flap 10c is formed integrally with the front under cowl 10.
It is also possible to form it with a separate member from the under cowl 10 and attach it to the bottom surface 10a of the under cowl 10.

Further, in the above-mentioned embodiment, the description is given of the scooter type vehicle 1 with the leg shield 9 and the rear under cowl 11 attached, but the present invention can also be applied to a scooter type vehicle without these members attached. can do. In short, it is sufficient that the footboard 13 and the under cowl 10 are provided between the front wheel 5 and the rear wheel 7.

(Effects of the Invention) As is clear from the above description, the dust-proof structure of the scooter type vehicle according to the present invention includes disposing a partition wall between the footboard and the power system to reduce the gap between them, and Since the rear end of the under cowl is provided with a flap that protrudes rearward and downward, less foreign matter such as dirt and dust can enter the footboard and the power system behind the under cowl. Therefore, the dustproof function of the air cleaner can be fully exhibited.

Further, the area around the fuel tank can be effectively dust-proofed, and it is also possible to reliably prevent mud and the like from entering the tank and mixing with the fuel when the cap is removed.

[Brief explanation of the drawing]

FIG. 1 is a side view of a scooter type vehicle to which an embodiment of the present invention is applied, FIG. 2 is a plan view of this vehicle with some structural members removed, and FIG. 3 is a 4 is a sectional view taken along line IV-IV in FIG. 2, FIG. 5 is a sectional view taken along line V-V in FIG. 3, and FIG. 6 is a plan view of the air cleaner. FIG. 7 is a view of the same air cleaner as seen from the inside of the vehicle body. DESCRIPTION OF SYMBOLS 1... Scooter type vehicle, 10... Front under cowl (under cowl), 10c... Flap, 13... Footboard, 13b... Bulkhead,
16... Engine (power system), 17... Fuel tank (power system), 18... Air cleaner (power system)
, 19... Driving wind flow population... 20... Space (driving wind flow passage) patent applicant Hiroki Shirai (4 others), patent attorney representing Yamaha Motor Co., Ltd.

Claims (1)

[Claims] An under cowl disposed to cover the lower part of the vehicle body between the front wheels and the rear wheels, a foot board disposed above the under cowl, and further behind the under cowl and foot board. In a scooter type vehicle equipped with a power system such as an engine and an air cleaner disposed in the footboard, a partition wall is disposed between the footboard and the power system to reduce a gap therebetween, and A dustproof structure for a scooter type vehicle, characterized in that a flap that protrudes rearward and downward is provided at the rear end of the under cowl.