JPH05213252A - Cooling water reservoir tank mounting structure for motorcycle - Google Patents

Abstract

PURPOSE:To improve maintainability of reservoir tank, to increase capacity of an air cleaner, and to reduce an influence exercised on other part when cooling water lacks out during injection of cooling water. CONSTITUTION:A swing arm pivot part 15 pivotally supporting a swing arm 22 is positioned in the central lower part of a car body frame 10, a radiator is arranged in front of a car body frame, and a reservoir tank 34 which stores cooling water in the radiator is arranged approximately in the same position as that of the swing arm pivot part. The reservoir tank comprises a tank part 35 capable of storing cooling water and an injection part 36 which is extended from the tank part along a long distance and has an injection nozzle 37. The tank part is disposed below the swing arm pivot part, and the injection part is located in front of the swing arm pivot part and along the swing arm pivot part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling water reservoir tank mounting structure for a motorcycle in which a mounting position of a reservoir tank for temporarily storing cooling water in a radiator is improved.

[0002]

2. Description of the Related Art FIG. 8 is a side view showing a vehicle body frame of a motorcycle to which a conventional cooling water reservoir tank mounting structure is applied.

Generally, in the water-cooled engine 1, the cooling water whose temperature has risen by cooling the engine is cooled by a radiator 3 arranged in the front part of the vehicle body frame 2. A reservoir tank 4 is connected to the radiator 3 to temporarily store the cooling water expanded by the temperature rise.

The reservoir tank 4 is generally arranged below the seat 5 in consideration of maintenance such as inspection of the amount of cooling water and supplement of cooling water. That is, the reservoir tank 4 is arranged below the seat 5 and between the air cleaner 7 and the battery 8.

[0005]

However, if the reservoir tank 4 is arranged below the seat 5 as described above, the seat 5 must be removed every time the cooling water is inspected or replenished. The sex is not good.

An air cleaner 7 is provided below the seat 5.
Although the battery 8 is also provided, since the reservoir tank 4 is provided, the capacity of the air cleaner 7 is limited accordingly, and the capacity of the air cleaner 7 cannot be set large.

Further, since the reservoir tank 4 is arranged below the seat 5 at a position higher than the body frame 2, many components are installed below the reservoir tank 4. Therefore, when the cooling water is replenished from the inlet of the reservoir tank 4, if the cooling water is zeroed,
The spilled cooling water may adhere to the above-mentioned many parts, cause rust, and may adversely affect electrical components.

The present invention has been made in consideration of the above-mentioned circumstances, and the maintainability of the reservoir tank is good, the capacity of the air cleaner can be increased, and the cooling water is zero when the cooling water is injected. An object of the present invention is to provide a cooling water reservoir tank mounting structure for a motorcycle that can reduce the influence on parts.

[0009]

According to the present invention, a swing arm pivot portion for pivotally supporting a swing arm is located at a lower center of a vehicle body frame, a radiator is arranged at a front portion of the vehicle body frame, and cooling is performed inside the radiator. A reservoir tank for storing water is arranged at substantially the same position as the swing arm pivot portion, and this reservoir tank is provided with a tank portion capable of storing the cooling water, and an inlet extending in a long shape from the tank portion. And an injection part, and the tank part is below the swing arm pivot part.
The injection part is arranged in front of the swing arm pivot part and along the swing arm pivot part.

[0010]

Therefore, according to the cooling water reservoir tank mounting structure for a motorcycle according to the present invention, since the reservoir tank is installed not at the lower side of the seat but at substantially the same position as the swing arm pivot portion of the vehicle body frame, the seat is removed. Without this, the amount of cooling water can be easily inspected, and the cooling water can be easily replenished from the inlet of the reservoir tank.

Further, although an air cleaner is generally arranged below the seat, the layout is such that the reservoir tank is not arranged below the seat. Therefore, the capacity of the air cleaner can be increased by removing the reservoir tank, which contributes to the improvement of engine output. it can.

Further, since the reservoir tank is arranged at substantially the same position as the swing arm pivot portion located at the lower part of the vehicle body frame, almost no other parts exist below the reservoir tank. For this reason, even if the cooling water is spilled when the cooling water is injected from the inlet of the reservoir tank, the spilled cooling water hardly adheres to other parts, and the influence on other parts can be reduced. ..

[0013]

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

FIG. 1 is a partial side view of FIG. 2 showing an embodiment of a cooling water reservoir tank mounting structure for a motorcycle according to the present invention. FIG. 2 is a vehicle frame in which the reservoir tank of FIG. 1 is installed. It is a whole side view showing.

As shown in FIGS. 2 and 4, the body frame 10 is a double cradle frame, and a pair of left and right main tubes 12 extend rearward of the head pipe 11. The main tube 12 bends downward on the way and a pair of left and right seat rails 1 is attached to the bending portion.
4 is welded. On the other hand, in the head pipe 11, a pair of left and right down tubes 13 extends downward. The down tube 13 curves rearward in the middle, further obliquely extends rearward and upward, and the lower end portion of the main tube 12 is welded. The down tube 13 extends further rearward and upward from the connection portion with the main tube 12 and is welded to the seat rail 14, and the rear portion of the down tube 13 functions as a seat pillar that supports the seat rail 14.

A swing arm pivot portion 15 is provided at a joint portion between the main tube 12 and the down tube 13.
It is welded so as to reinforce the joint portion. The swing arm pivot portion 15 is located at the lower center of the body frame 10. In addition, a pair of left and right main tubes 12
An upper bridge 16 and a lower bridge 17 are bridged above and below the main tube 12
The down tube 13 is reinforced. Furthermore, the reinforcement 18 is also welded between the main tube 12 and the down tube 13 near the head pipe 11 to reinforce the periphery of the head pipe 11.

A front fork 19 shown in FIG. 2 is supported by the head pipe 11 via a steering shaft (not shown) so as to be swingable in the left-right direction. A handlebar 20 is attached to an upper portion of the front fork 19, and a front wheel 21 is rotatably supported on a lower portion of the front fork 19. In addition, the swing arm pivot unit 1
A swing arm 22 is swingably supported in the up-down direction by 5, and a rear wheel 23 is rotatably supported by a free end of the swing arm 22.

An engine 24 is mounted in a space surrounded by the main tube 12 and the down tube 13, and a carburetor 25 and an air cleaner 26 as an intake system of the engine 24 are arranged below a fuel tank 27 and a seat 28. .. A battery 29 is arranged below the seat 28 in addition to the air cleaner 26. The fuel tank 27 is supported by the main tube 12, and the seat 28 is supported by the seat rail 14. Also,
An exhaust pipe 30 and a muffler 31 are sequentially connected to the engine 24. The exhaust pipe 30 and the muffler 31 are arranged below the down tube 13 so as to substantially follow the shape of the down tube 13.

On the other hand, at the front part of the down tube 13, a radiator 32 is installed near the lower part of the head pipe 11.
The engine 24 is a water-cooled engine, and the engine 2
It is cooled by the cooling water circulating in the water jacket 4 (not shown). The radiator 32 is for cooling the engine 24 and cooling water having a high temperature. A reservoir tank 34 is connected to the radiator 32 via a reservoir hose 33 to temporarily store the cooling water in the radiator 32. In other words, the reservoir tank 34 temporarily stores the cooling water overflowing from the radiator 32 when the temperature of the cooling water in the radiator 32 rises and the volume expands, and conversely, the temperature of the cooling water decreases. When the inside of the radiator 32 becomes negative pressure, the reservoir tank 3
Return the cooling water stored in 4 into the radiator 32,
The amount of cooling water in the radiator 32 is always constant.

The reservoir tank 34 has a tank portion 35.
Also, as shown in FIG. 1, it is configured to have an injection portion 36, and is disposed at substantially the same position as the swing arm pivot portion 15 in a side view of the vehicle body frame 10. That is, the tank part 35 is located below the swing arm 22 and the swing arm pivot part 15, and the injection part 36 is located between the front part of the swing arm pivot part 15 and the engine 24 and the front part of the swing arm pivot part 15. Are arranged along the shape of.

As shown in FIGS. 5, 6 and 7, the injection portion 36 of the reservoir tank 34 extends obliquely upward from one side of the upper portion of the tank portion 35, and has an upper end for replenishing cooling water. Injecting port 37 of The tank portion 35 is a portion for storing cooling water, and has a hose plug 38 at the lower end.
Is provided. One end of the reservoir hose 33 is connected to the hose plug 38, the other end of the reservoir hose 33 is connected to the radiator 32, and cooling water flows in and out between the radiator 32 and the tank portion 35 of the reservoir tank 34. Further, an atmospheric pressure port 39 for maintaining the inside of the tank portion 35 at the atmospheric pressure is provided at the upper end of the tank portion 35.

Mounting pieces 40 are formed on the hose plug 38 of the tank portion 35 and on the lower portion of the injection portion 36, respectively. On the other hand, as shown in FIG. 1, FIG. 3 and FIG. 4, a pair of engine mounting brackets 41 are welded to the lower bridge 17 of the vehicle body frame 10, and a reservoir tank mounting bracket 42 is provided at the center position of these engine mounting brackets 41. Is welded. The reservoir tank 34 is fixed to the lower bridge 17 of the vehicle body frame 10 by bolting the mounting piece 40 to the reservoir tank mounting bracket 42. The reference numeral 43 in FIG. 3 is a frame center indicating the center of the body frame 10 in the left-right direction.

According to the above embodiment, the reservoir tank 34
Is not below the seat 28 but at substantially the same position as the swing arm pivot portion 15 of the vehicle body frame 10, and the tank portion 35 of the reservoir tank 34 is disposed below the swing arm pivot portion 15 and the swing arm 22. The amount of cooling water can be easily detected without removing 28, and the cooling water can be replenished into the tank portion 35 from the inlet 37 without removing the sheet 28. Therefore, the maintainability of the reservoir tank can be improved.

Further, since the layout is such that the reservoir tank 34 is not arranged below the seat 28, the capacity of the air cleaner 26 can be increased by the amount of the reservoir tank 34 removed below the seat 28, and the engine output can be increased. Can contribute to improvement.

Further, since the reservoir tank 34 is arranged at substantially the same position as the swing arm pivot portion 15 of the vehicle body frame 10 and there are almost no other parts below this position, cooling water is supplied from the inlet 37 of the reservoir tank 34. Even if the cooling water is spilled at the time of replenishing, the spilled cooling water does not adhere to other parts, and the influence on other parts can be reduced. In particular, since electrical components are parts that are difficult to waterproof, adverse effects on electrical components can be reduced.

Further, since the injection portion 36 of the reservoir tank 34 is arranged in the gap between the swing arm pivot portion 15 and the engine 4, this gap can be filled in a good appearance and the appearance of the motorcycle can be improved. ..

[0027]

As described above, according to the cooling water reservoir tank mounting structure for a motorcycle of the present invention, the swing arm pivot portion for pivotally supporting the swing arm is located at the lower center of the body frame, and the body frame is provided. A radiator is arranged in the front part of the radiator, a reservoir tank for storing cooling water in the radiator is arranged at substantially the same position as the swing arm pivot portion, and the reservoir tank is a tank portion capable of storing the cooling water. , Which is configured to have an injection portion that extends in a long shape from this tank portion and has an injection port,
Since the tank portion is arranged below the swing arm pivot portion and the injection portion is arranged in front of the swing arm pivot portion and along the swing arm pivot portion, it is possible to perform maintenance without removing the seat. Of the air cleaner, the capacity of the air cleaner can be increased, and the influence on other parts when the cooling water is zero when the cooling water is injected can be reduced.

[Brief description of drawings]

1 is a partial side view of FIG. 2 showing an embodiment of a cooling water reservoir tank mounting structure for a motorcycle according to the present invention.

2 is an overall side view showing a vehicle body frame in which the reservoir tank of FIG. 1 is installed.

FIG. 3 is a view on arrow III in FIG.

FIG. 4 is a perspective view showing the vehicle body frame of FIG. 2 together with a reservoir tank.

5 is a front view of the reservoir tank of FIG.

6 is a right side view of the reservoir tank of FIG.

FIG. 7 is a plan view of the reservoir tank of FIG.

FIG. 8 is an overall side view showing a vehicle body frame to which a conventional cooling water reservoir tank mounting structure is applied.

[Explanation of symbols]

 10 Body Frame 15 Swing Arm Pivot Part 22 Swing Arm 32 Radiator 34 Reservoir Tank 35 Tank Part 36 Filling Part 37 Filling Port

Claims (1)

[Claims] 1. A swing arm pivot portion that pivotally supports a swing arm is located in the lower center of a vehicle body frame, a radiator is disposed in a front portion of the vehicle body frame, and a reservoir tank for storing cooling water in the radiator is the above. This reservoir tank is arranged at substantially the same position as the swing arm pivot part, and this reservoir tank has a tank part capable of storing the cooling water, and an injection part that extends from the tank part in a long shape and has an injection port. Cooling water for a motorcycle, wherein the tank portion is arranged below the swing arm pivot portion, and the injection portion is arranged in front of the swing arm pivot portion and along the swing arm pivot portion. Reservoir tank mounting structure.