JPH01306381A - Cooling device for motorcycle - Google Patents

Abstract

PURPOSE:To increase the cooling capacity of a radiator and shorten a wheel base by extending the width of the radiator laterally so as to be wider than that of the front wheel, and forming the thickness thereof so as to be thin in the center part behind the front wheel and thick in the both end parts. CONSTITUTION:A radiator 5 is disposed between an engine 2 and a front wheel 3, and the both side surface parts are covered with cowlings 6. The radiator 5 has a broad structure in which the width is laterally extended so as to be larger than the width of the front wheel, and the cross thickness is made thin in the center part 5c positioned behind the front wheel and thick in the both side parts 5s. The radiator 5 is formed of fin form lines combined in the core 9 form, and the cooling wind introduced from the front wheel side is passed through the cores 9 and exhausted through wind holes 11 formed in the cowlings 6. The extension of the wind receiving area enables an increase in cooling ability of the radiator and a reduction in mounting space thereof, and the wheel base can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a cooling device for a radiator provided in front of an engine of a motorcycle or three-wheeled vehicle (hereinafter simply referred to as a motorcycle or the like).

[Prior art]

In a motorcycle equipped with a water-cooled engine, the radiator is generally placed in front of the engine and sandwiched between the front wheel and the front wheel. On the other hand, as engines become larger, it becomes necessary to install radiators with greater cooling capacity, which means that the thickness of the front and rear of the radiator must be increased to increase capacity. .

However, in the arrangement relationship between the radiator, the engine, and the front wheels as described above, if the thickness of the radiator is increased, the wheelbase must also be lengthened, creating a problem that the vehicle body becomes difficult to handle.

[Purpose of the invention]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, an object of the present invention is to provide a cooling device for a motorcycle, etc., which can improve the cooling capacity of a radiator without unnecessarily lengthening the wheel base. It is in.

[Structure of the invention]

To achieve the above object, the cooling device of the present invention, in a motorcycle or the like in which a radiator is disposed between an engine and a front wheel, makes the width of the radiator wider than the width of the front wheel and extended in the left-right direction. On the other hand, the thickness of the front and rear wheels is thinner at the center portion located behind the front wheel, and thicker at both side portions than the center portion.

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

Figures 1 to 4 show a motorcycle equipped with a cooling device according to the present invention, where ◯ indicates a main frame constituting the body frame, and 2 indicates a water-cooled engine consisting of parallel 4 cylinders suspended on this main frame 1. , 3 is the front wheel, and 4 is the rear wheel. The center of gravity of the engine 2 is lowered by tilting the cylinders forward. A radiator 5 is arranged in front of the engine 2 so as to be sandwiched between it and the front wheels 3. Further, a cowling 6 is provided to cover the front of the vehicle body.

The radiator 5 has water tanks 7.8 at its upper and lower parts, respectively, and these water tanks 7.8 communicate with the cooling jacket of the engine 2 through hoses (not shown). The water tank 7 on the upper side stores cooling water after cooling the engine, and it flows down towards the water tank 8 on the lower side, and during the flow, it is cooled by heat exchange with the cooling air in the radiator body. That's what I do.

The cooled cooling water then flows back to the engine 2 from the water tank 8.

The width of this radiator 5 is not only the width of the front wheel 3, but also
It is so wide that it exceeds the width of the engine 2, and extends in the left-right direction across the width of the vehicle body. In such a wide radiator body, the central part 5C located behind the front wheels 3 has a thin front and rear thickness, and faces the front toward the direction of travel, while the left and right side parts 5s, 5S is each 11< thicker than the said center part 5c, and the outer end side is diagonally forward, and the front surface is inclined. The angle at which the side portion 5s is inclined is the most compressed state (second
When the front wheels 3 are steered from side to side (indicated by chain lines in the figure), the angle may be set as a limit such that the front wheels 3 do not interfere with each other.

The central portion 5c and the left and right side portions 5s, 5s constituting the main body of the radiator 5 are each constructed by stacking plate-shaped cores 9 in which a large number of fin-shaped conduits are vertically arranged in a multi-tiered manner. ing. The central portion 5c is thin as a whole by arranging only one wide plate-like core 9 on the front side and overlapping narrow-width plate-like cores 9.9 on both ends of the back side. On the other hand, the left and right sides 5s, 5S have two wide plate cores 9, 9 stacked on the front side, and two plate cores 9, 9 stacked on the back side so that the width becomes narrower. It is constructed in a stair-like manner.

Due to the configuration of the radiator body as described above, a concave space 10 is formed in the central portion of the back side of the radiator 5. A part of the cam cover 20 of the forward-inclined cylinder head of the engine 2 enters into this concave space IO and overlaps, so that the overall wheelbase is shortened by this overlap.

On the other hand, the engine 2 is suspended by an engine bracket 12 that fixes the side portion of the cylinder head to the main frame 1. That is, the engine bracket 12 is made in a triangular shape, and bolts 15 are attached to the brackets 14 and 14 of the main frame 1 at two locations on its upper side.
The engine 2 is suspended by fixing the boss portion 16 on the side surface of the cylinder head with bolts 17 and 17 at two locations on the lower side.

Corresponding to such an engine bracket 12, air holes 11 are provided on the sides of the cowling 6 to guide cooling air in and out.
is provided. In addition, the engine bracket 12 is also provided with an air hole 13 extending diagonally rearward from the inside to the outside so as to be lined up front and rear with the air hole 11. By providing two air holes 11.13 in this way,
The area of the air hole for guiding the running wind inside the cowling 6 to the outside is expanded.

Now, in the above-mentioned motorcycle, the width of the radiator 5 is wide, greatly exceeding the width of the front wheel 3, so that the area of the radiator 5 can be increased, and the cooling capacity can be increased. Moreover, the thickness is thinner in the center part 5c where the wind is blocked by the front tQ 3, and in the side parts 5s and 5s where the largest amount of wind blows into the front wheels 3 without being blocked, the thickness of j7 is increased, further increasing the cooling capacity. You will be able to do this. Furthermore, since the central portion 5c is thin as described above, the engine 2 can be positioned closer to the radiator 5 by that amount, and an increase in the wheelbase can be avoided.

Further, by making the both side portions 5s and 5s obliquely inclined as in the above-mentioned embodiment, it is possible to expand the area of the wind blowing, thereby making it possible to further improve the cooling capacity.

〔Effect of the invention〕

As described above, in a motorcycle or the like in which a radiator is disposed between an engine and a front wheel, the cooling device of the present invention makes the width of the radiator wider than the width of the front wheel and extends in the left-right direction. The thickness of the radiator is made thinner at the center located behind the front wheel, and thicker at both sides than the center, improving the cooling capacity of the radiator.Moreover, since the center is thin and thin, the wheelbase can be easily manipulated. This can be achieved without taking too long.

[Brief explanation of the drawing]

The figures show a motorcycle equipped with a cooling device according to an embodiment of the present invention.
The drawings are a view taken along the line nn in FIG. 1, FIG. 3 is a side view showing the entire motorcycle, and FIG. 4 is a front view of the motorcycle. 1...Main frame, 2...Engine, 3...Front wheel (5...Radiator, 5c...Central part, 5s...
Side part, 6... Cowling, 9... Plate core. Agent Patent Attorney Nobuo Ogawa −

Claims (1)

[Claims] In a motorcycle or the like in which a radiator is arranged between an engine and a front wheel, the width of the radiator is wider than the width of the front wheel and extended in the left-right direction, and the thickness of the radiator is set to be located behind the front wheel. A cooling device for a motorcycle, etc., which is thin at the center and thicker at both sides than the center.