JP3044269B2 - Motorcycle running wind distribution structure - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a motorcycle, and more particularly to a running air distribution structure of a motorcycle for a motor troxer.

(Conventional technology) In a motocrosser that travels on rough terrain with a sharp rise, a rider's posture changes greatly during driving, so a long seat in the longitudinal direction of the vehicle body is adopted.
The seat is mounted on a pair of left and right main frames extending obliquely rearward and downward from the head pipe and seat rails extending obliquely rearward and upward from the main frame.

(Problems to be Solved by the Invention) However, conventionally, since the seat is placed on the main frame and the seat rail so that the lower surfaces thereof closely follow, the thickness of the central portion of the seat is increased, and the cushion performance is poor. Not only that, the weight and size of the sheet were increased.

Further, since no gap is formed between the seat and the main frame and the seat rail, the hot air in the vehicle body cannot be effectively discharged to the outside of the vehicle body.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a motorcycle capable of effectively removing hot air from inside a vehicle body to the outside of the vehicle body and reducing the size and weight of a seat. It is to provide a traveling wind distribution structure.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a pair of left and right main frames extending substantially linearly from a head pipe toward a rear arm pivot, and a rear upper portion from near a rear end of the main frame. A pair of left and right seat rails extending toward the main frame, and a seat placed on the main frame and the seat rail from the rear of the head pipe, and an air cleaner between the pair of left and right main frames below the seat. In the traveling wind distribution structure of a motorcycle in which both sides of the vehicle body are covered with side covers, the upper surface of the seat has a smooth arc shape that is convex downward in a side view, and the main frame and the seat rail are provided. Cut the lower part of the sheet so that the lower part of the sheet located in the downwardly convex V-shaped part formed by The notch, the cutout and the cutouts formed on the left and right sides of the side cover make the air vent openings open on the left and right sides of the vehicle body, and the lower edge and the inner plate of the outer plate of the main frame facing each of the openings. A tapered cut surface for air release is formed at each corner of the upper edge.

(Operation) According to the present invention, the cutouts formed at the lower portion of the seat and the cutouts formed at the left and right of the side cover allow the air vent openings to be opened at the left and right sides of the vehicle body. Since the tapered cut surface for air release is formed at each corner of the lower edge of the outer plate and the upper edge of the inner plate, the hot air in the vehicle body is effectively discharged to the outside of the vehicle body through the left and right openings, and the air cleaner Is not heated by hot air.

Further, the seat is partially cut away, and the thickness in the length direction is kept substantially uniform, so that the seat is reduced in size and weight and the cushion performance is enhanced.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view of a motorcycle having a traveling wind distribution structure according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG.
The figure is a sectional view taken along the line III-III of FIG. 1, and FIG. 4 is a side view of a main part of the motorcycle.

First, a schematic configuration of the motorcycle 1 will be described with reference to FIG. 1. The motorcycle 1 is a motocrosser, and a steering shaft (not shown) is inserted through a head pipe 2 located at an upper front part of the vehicle body. A steering wheel 3 is attached to an upper end of the steering shaft, and a long-stroke front fork 4 is attached to a lower end of the steering shaft. A front wheel 5 is rotatably supported at the lower end of the front fork 4, and a front fender 6 fixed to an outer tube 4 a of the front fork 4 is located above the front wheel 5.

Also, two wide left and right main frames 7, 7 extend substantially linearly obliquely rearward and downward from the head pipe 2, and stand substantially vertically at the rear end of each main frame 7. A rear arm bracket 8 is attached. One end of a square pipe-shaped down tube 9 is attached to each main frame 7, and the down tube 9 extends downward from the main frame 7, is bent backward, and has a rear end portion which is It is attached to the rear arm bracket 8. Also, a water-cooled engine 11 is mounted in a space surrounded by the main frames 7, 7 and the down tubes 9, 9,
An exhaust pipe 12 extends rearward from the exhaust system of the water-cooled engine 11.

Further, a pair of left and right seat rails 13, 13 extend linearly obliquely rearward and upward from near the rear end of the main frames 7, 7, and from the rear of the head pipe 2, the main frames 7, 7, and A seat 14 that is long in the front-rear direction of the vehicle body is placed on the seat rails 13, 13.

On the other hand, the rear arm brackets 8, 8 have the rear arm 1
The front end of 5 is pivotally mounted on a pivot shaft 16, and a rear end of a rear arm 15 is rotatably supported by a rear wheel 17 serving as a driving wheel, and the rear arm 15 has a link mechanism 18 and a rear cushion 19. Suspended on the vehicle body side. A rear fender 20 is provided behind the seat 14 and above the rear wheel 17, and in the present embodiment, the rear fender 20 also serves as a silencer, and has a glass wool inside. And so on.

Further, a radiator 21 is disposed below and behind the head pipe 2 and in front of the main frames 7, 7 (down tubes 9, 9). An air cleaner 22 is arranged inside. One end of an intake duct 23 is connected to the air cleaner 22, and the other end of the intake duct 23 is connected to the carburetor 24.
And an intake pipe 25 connected to the intake system of the engine 11. Note that both sides of the motorcycle 1 are covered with side covers 26 integrally formed of resin.

Here, the configuration of the seat 14 will be described in detail with reference to FIGS.

As shown in FIG. 4, the upper surface of the seat 14 is formed in a smooth arc shape with the upper surface projecting downward in a side view, and a substantially central portion of the lower surface thereof, that is, the main frames 7, 7 and the seat rails 13, 13, The portion (cut line 14a on the lower surface) located at the downwardly convex V-shaped portion a formed by is cut out so as to be substantially parallel to the upper surface. A concave portion 14b is formed in the center of the lower surface of the sheet 14, as shown in FIGS.
The air cleaner 22 is housed therein. Therefore, the thickness of the sheet 14 is kept substantially uniform in the length direction, so that the size and weight of the sheet 14 can be reduced, and the cushioning performance can be enhanced. Further, since a triangular air vent opening (notch) 27 is formed between the seat 14 and each of the main frames 7 and each of the seat rails 13, hot air in the vehicle body is opened on both sides of the vehicle body. Through the openings 27, 27 which are effectively discharged outside the vehicle body.

As shown in FIG. 4, a notch 26a is formed on the side of the side cover 26, and each side of the vehicle body is formed between the notch 26a and the seat 14. The air vent openings 28 are each open. The opening 28 includes the opening 27. Further, tapered cut surfaces 7a and 7b for venting are formed at the corners of the lower edge of the outer plate and the upper edge of the inner plate facing the opening 28 of each main frame 7. As shown by the arrows in FIG. 2, the warm air that has passed through the radiator 21 flows smoothly along the cut surfaces 7a, 7b, and is discharged out of the vehicle body through the openings 28, 28. For this reason, the air cleaner 22 is not heated by the hot air in the vehicle body, and the density of the intake air sucked into the air cleaner 22 is suppressed to a small value.
The filling efficiency of 11 is improved.

(Effect of the Invention) As is apparent from the above description, according to the present invention, a pair of left and right main frames extending substantially linearly from the head pipe toward the rear arm pivot, and a rear upper portion from near the rear end of the main frame. A pair of left and right seat rails extending toward the main frame, and a seat placed on the main frame and the seat rail from the rear of the head pipe, and an air cleaner between the pair of left and right main frames below the seat. In the traveling wind distribution structure of a motorcycle having both sides of a vehicle body covered with side covers, the upper surface of the seat has a smooth arc shape that is convex downward in a side view, and the main frame and the seat rail Cut out the lower part of the sheet so that the lower part of the sheet located at the downwardly convex V-shaped part formed by The cutouts and the cutouts formed on the left and right sides of the side cover are used to open the air vent openings on the left and right sides of the vehicle body, and the lower edge of the outer plate and the inner plate of the main frame facing the respective openings are formed. Because the tapered cut surface for air release is formed at each corner of the upper edge, the hot air inside the vehicle body can be effectively extracted outside the vehicle body, and the effect of reducing the size and weight of the seat can be achieved. can get.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle having a ventilation structure according to the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. FIG. 2 is a side view of a main part of the motorcycle. 1 ... motorcycle, 2 ... head pipe, 7 ... main frame, 7a, 7b ... cut surface, 13 ... seat rail, 1
4 ... Seat, 16 ... Pivot shaft, 22 ... Air cleaner, 26 ... Side cover, 26a ... Notch, 27 ...
Notch, 28 ... opening, a ... V-shaped part.

Claims (1)

(57) [Claims] A pair of left and right main frames extending substantially linearly from a head pipe toward a rear arm pivot;
A pair of left and right seat rails extending rearward and upward from the vicinity of the rear end of the main frame; seats are placed on the main frame and the seat rails from the rear of the head pipe; In a motorcycle running air flow structure in which an air cleaner is disposed between the pair of left and right main frames and both sides of the vehicle body are covered with side covers, a smooth arcuate shape in which the upper surface of the seat projects downward in a side view. In addition, the lower portion of the seat is cut out so that a portion of the lower surface of the seat located at the downwardly convex V-shaped portion formed by the main frame and the seat rail is substantially parallel to the upper surface, and With the cutouts formed on the left and right sides of the side cover, the air vent openings are opened on the left and right sides of the vehicle body, and the lower edge of the outer plate of the main frame facing each opening A traveling wind distribution structure for a motorcycle, wherein a tapered cut surface for venting air is formed at each corner of the upper edge of the inner plate.