JPH0326061Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a cowling containing a radiator therein.

(Prior Art) In order to reduce the wind pressure that a motorcycle receives from the front while driving, some motorcycles have recently been designed to cover the front of the motorcycle body with a cowling. On the other hand, a motorcycle equipped with a water-cooled engine has a radiator located at the front of the vehicle body. When a cowling is attached to a motorcycle equipped with such a radiator, the arrangement becomes as shown in FIG. 4.

That is, an opening 101 is formed in the front surface of the cowling 100 to take in cooling air, and the radiator 102 is arranged inside the cowling 100, and the area of the core 102a of the radiator 102 is increased to increase the cooling effect. The tank 102b is attached to the side wall 100a of the cowling 100.
The core 102 is placed in contact with or very close to the inner surface of the radiator 102, and an opening 103 is formed in the side wall 100a at a rear position of the radiator 102.
The cooling air that has passed through a is drawn out through an opening 103.

(Problems to be Solved by the Invention) In the above-described relationship between the cowling and the radiator, a sufficient core area cannot be secured even if the width of the radiator is widened until it comes into contact with the inner surface of the cowling.
Further, the front and rear side wall surfaces of the opening 103 formed in the cowling are flush with each other, and with this structure, the negative pressure generated outside the opening 103 during running is small, so the cooling air that has passed through the core 102a is forced to flow through the opening 103.
The degree to which it is extracted from the

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a motorcycle in which a radiator is housed in a cowling attached to the front of the vehicle body. A bulging portion is formed and an opening is formed at the rear of the bulging portion, the radiator is configured with a central core and left and right tanks, and the center portion of the radiator in the left-right direction is offset toward the rear of the vehicle body than both sides. In addition, the central portion is located forward of the rear end of the opening, and furthermore, the locus of movement of the front wheels located at the front lower part of the radiator in a plan view is directed toward the center portion of the radiator in the left-right direction. shall be.

(Function) By expanding the cowling, the width of the radiator can be increased, and the negative pressure generated outside the opening during driving is increased, thereby increasing the cooling effect.

(Example) An example of the present invention will be described below based on the accompanying drawings.

Fig. 1 is a side view of a motorcycle to which the cowling according to the present invention is applied, Fig. 2 is a plan sectional view showing the relationship between the cowling and the radiator, and Fig. 3 is a front view of the cowling. A main frame 2 is extended rearward and downward from the main frame 2, a pivot plate 2a is welded to the rear end of the main frame 2, a seat gusset 3 is attached to the pivot plate 2a, and the pivot plate 2a and the main frame 2 The engine 4 is suspended and supported between the gusset plate and the gusset plate welded to the gusset plate.

Further, the head tube 1 is provided with upper and lower bridges 5 and 6, the upper parts of the left and right front forks 7 are inserted and held between these bridges 5 and 6, and the front wheels 8 are rotatably supported at the lower ends of the front forks 7. Furthermore, there is a handle 9 on the top of the front fork 7.
is installed.

On the other hand, the front end of the seat rail 10 is fixed to the upper end of the seat gusset 3, and the pivot plate 2
A front end of a rear fork 11 is swingably supported, a seat 12 is mounted and fixed on a seat rail 10, and a rear wheel 13 is rotatably supported at the rear end of the rear fork 11. Further, two exhaust pipes 14 and 15 are led out from the engine 4, the exhaust pipe 14 draws a loop in the middle part, and the exhaust pipe 15 passes through this loop and extends to the rear of the vehicle body.
Mufflers 16 and 17 are connected to the rear end portions of 4 and 15. Furthermore, a carburetor and air cleaner case 18 are arranged at the upper rear position of the engine 4.
These carburetors and air cleaner cases 18
is arranged in a space formed between the main frame 2, the seat gusset 3, and a fuel tank 19 placed between the main frame 2 and the seat gusset 3.

By the way, a radiator 20 for radiating heat from engine cooling water is disposed below the front of the main frame 2, and a cowling 21 covers the front part of the vehicle body.

The radiator 20 is, for example, a side flow type, and its shape is V-shaped with both sides bent forward and the center bent backward, as shown in FIG.
A core 20b for heat dissipation is provided between 0a. As described above, the radiator 20 has a substantially V-shape with the center bent rearward, and the locus of movement of the front wheels 8 is directed to this central bent portion.

On the other hand, the cowling 21 has an opening 22 for introducing cooling air in the front, a transparent fairing 23 is attached to the upper end, and left and right side walls 21a, 21.
Openings 24, 24 are formed in a. This opening 24 is located at the rear of the radiator 20 and the core 20
The cooling air that has passed through b is discharged to the outside. Also, of the side wall portion 21a forming the opening 24, the opening 24
The front portion of the radiator 20 is an outwardly bulging portion 21b, and the tank 20a of the radiator 20 is arranged so as to come into contact with the inner surface of the bulging portion 21b.

In the above, as the motorcycle runs, cooling air is introduced from the opening 22 of the cowling 21, this cooling air passes through the core 20b of the radiator 20, causes the cooling water to radiate heat through heat exchange accompanying this passage, and further core The cooling air that has passed through 20b is drawn outward from the opening 24 in the side wall 21a.

(Effect of the invention) As explained above, according to the invention, the front part of the cooling air discharge opening in the side wall of the cowling is bulged outward, and the radiator is disposed inside this bulge. Because of this, the area of the radiator can be increased by the amount of bulge.Also, by bulging the front part of the opening outward, the negative pressure outside the opening that occurs while driving increases, and the core of the radiator The cooling air passing through the core is strongly drawn outward, increasing the amount of cooling air passing through the core. As a result, the cooling effect of the radiator is improved. Also, since the radiator tanks are placed on the left and right sides of the radiator, these tanks are attached to the cowling 2.
Close to the inner surface of 1. Therefore, these tanks are located near the inner surface of the cowling, where the flow velocity of the traveling wind is low, so that they do not have a negative effect on the high velocity traveling wind that flows away from the inner surface of the cowling, thereby effectively cooling the engine. be able to.

In addition, the left and right center of the radiator is shifted toward the rear of the vehicle body relative to both sides, forming the radiator into a substantially V-shape.
The trajectory of the front wheels faces the center of the radiator that bends backwards, so even if the front wheels sink and move rearward in plan view, a predetermined clearance to the radiator can be secured. , it is possible to improve the degree of freedom in the arrangement of the front wheels and the radiator.

Furthermore, since the radiator is disposed in front of the rear end of the opening behind the cowling's bulge, the wind flows smoothly.

[Brief explanation of the drawing]

Figure 1 is a side view of a motorcycle to which the cowling according to the present invention is applied, Figure 2 is a cross-sectional plan view showing the positional relationship between the cowling and the radiator, Figure 3 is a front view of the cowling, and Figure 4 is a conventional motorcycle. FIG. 3 is a plan cross-sectional view showing the positional relationship between a cowling and a radiator. In addition, in the drawing, 2 is the main frame, 3 is the seat gusset, 4 is the engine, 20 is the radiator, 20
a is a radiator tank, 20b is a radiator core, 21 is a cowling, 21a is a side wall of the cowling, 21b is a bulge, and 24 is an opening.

Claims (1)

[Scope of utility model registration request] In a motorcycle in which a radiator is housed in a cowling attached to the front of the vehicle body, an outward bulge is formed on both sides of the cowling, and an opening is formed at the rear of the bulge, and the radiator The radiator is composed of a central core and left and right tanks, and the radiator's center portion in the left and right direction is offset toward the rear of the vehicle body than both sides, and this center portion is located forward of the rear end of the opening, and the front lower part of the radiator 1. A cowling for a motorcycle, characterized in that a movement locus of a front wheel located at the front wheel is directed toward a center portion of the radiator in the left-right direction.