JPH0194086A - Drainage structure of recovery tank for car - Google Patents

Abstract

PURPOSE: To guide overflowed water to the underside of a vehicle by use of simple constitution, while eliminating the need to allow for interference with a movable part such as a rear arm, by communicating a drain port in a recovery tank with either a back stay or a seat pillar, and forming a drain hole near the connection between the back stay and the seat pillar. CONSTITUTION: When the surface of water in a recovery tank 12 rises to a predetermined level or higher with an increase in amount of cooling water from a radiator, the water overflows from a drain pipe 12d accordingly, passes through a back stay 2f and a seat pillar 2d from a drain hose 14, and drains to the underside of a vehicle from a drain port 16. Therefore, a problem such as the fouling of occupants can be solved by preventing the splashing of the overflow. Since the back stay 2f and the seat pillar 2d are used as drain tubes, a structure is simplified, and the need to allow for interference with a movable part such as a rear arm is eliminated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a drainage structure for a recovery tank, and in particular, the present invention relates to a drainage structure for a recovery tank, and particularly, when the recovery tank is mounted approximately in the center of a vehicle body frame, it is possible to easily drain overflow water from the tank. The present invention relates to a drainage structure which allows drainage to a predetermined position without causing problems of interference with the rear arm.

[Conventional technology]

A vehicle equipped with a water-cooled engine is equipped with a recovery tank to store the expansion caused by the temperature rise of the cooling water on the radiator side and to compensate for the contraction caused by the temperature drop.

This recovery tank is configured to overflow and drain the excess amount when the amount of cooling water exceeds a predetermined amount. In some cases, this recovery tank is mounted near the triangular area formed by the seat pillar, seat rail, and backstay of the car body frame. There is a risk that the particles may be scattered and stain the clothes of the passengers.

Conventionally, in order to prevent the above-mentioned overflow water from scattering, a drainage tube is connected to the recovery tank's drain port, and this tube is piped downward along the vehicle body frame to guide the above-mentioned overflow water below the vehicle. I have to.

[Problem that the invention seeks to solve]

However, in the drainage structure equipped with the above drainage tube,
Since this drainage tube must be piped along the vehicle body frame and appropriately clamped, the structure becomes more complex. Moreover, below the triangular 9N area is a rear arm that swings up and down.

and possibly a driving chino.

Therefore, when piping the drain tube, it is necessary to avoid interference with these movable parts, which limits the piping route and clamping method, making the work difficult.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to eliminate the need to consider interference with rear arms, drive chains, etc.
Moreover, it is an object of the present invention to provide a drainage structure for a recovery tank that has a simple structure and can guide overflow water to the lower part of a vehicle.

[Means for solving problems]

The present invention drains overflow water from a recovery tank connected to a radiator to a predetermined position in a vehicle equipped with a vehicle body frame in which a seat pillar and a seat rail are connected in a substantially triangular shape by a backstay extending vertically. In this structure, the recovery tank is installed near the triangular area, the drain port of the recovery tank is communicatively connected to either the backstay or the seat pillar, and the backstay is connected to the seat pillar. It is characterized by a drainage hole formed near the part.

Here, the seat pillar in the present invention includes not only the case where it is separate from the main vibe but also the case where it is formed by extending the main pipe, and the drainage hole is formed at a desired position such as the backstay or the lower end of the seat pillar. It is preferable to position the drain as far down as possible.

[Effect]

According to the recovery tank drainage structure according to the present invention, since the vehicle body frame is used as a drainage passage, a separate drainage tube and clamp member are not required, and of course, piping work for the tube is not required. Therefore, the structure is simple, and there is no need to consider interference with the moving parts.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 are diagrams for explaining a drainage structure of a recovery tank in a motorcycle according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a motorcycle to which the structure of this embodiment is applied, and its body frame 2 is a so-called semi-double cradle type steel pipe frame having the following configuration. That is, the upper and lower main pipes 2b and 2c are connected to the steering shaft cylinder 2a, and the seat rails 2e that extend to the rear of the pair of left and right seat pillars 2dS that extend downward are connected to the rear end of the upper main pipe 2b, respectively. Connect each seat rail 2e,
The seat pillars 2d are connected by a back stay 2f in a substantially triangular shape when viewed from the side, and the rear ends of the pair of left and right down tubes 2g connected to the rear ends of the lower main vibe 2C are connected to the lower ends of the seat pillars 2d. It is configured as follows.

A front fork 4 that pivotally supports a front wheel 3 at its lower end is pivoted to the steering shaft cylinder 2a so as to be able to swing from side to side, and a rear arm 6 that pivotally supports a rear wheel 5 at its rear end is attached to the lower end of the seat pillar 2d. is pivoted so that it can swing up and down.

Further, a water-cooled two-stroke engine 10 is disposed approximately in the middle of the vehicle body frame 2, a fuel tank 7° seat 8 is disposed at the top, and a rear fender 9 that covers the upper part of the rear wheel 5 is disposed at the rear end. ing.

Then, the rear wheel 5
The recovery tank 12 of this embodiment is arranged outside. This recovery tank 12 is an integrally molded resin product, and two support plackets 12a and 1
2b is integrally formed. The upper bracket 12a is connected to the reinforcing vibe 2h fixed to the connection between the seat rail 2e and the backstay 2f, and the front bracket 12b
are each bolted and fixed to the backstay 2f.

Further, an inflow pipe 12C is provided at the bottom wall corner of the front wall of the recovery tank 12, and a drainage pipe "W12d" is provided at the top wall corner.
are each formed integrally. This inflow pipe 12c is connected to a radiator 18 disposed at the front of the vehicle body by a rubber hose 17, so that when the temperature of the cooling water rises,
The expanded portion of the cooling water is stored in the recovery tank 12,
Moreover, when the cooling water contracts due to a drop in temperature, the cooling water is configured to be supplied to the radiator.

The drain pipe 12d formed at the corner of the ceiling wall is
It is connected by a drain hose 14 to a connecting pipe 13 which is communicated and fixed to the backstay 2f. In addition, the above backstay 2
A communication hole 15 is formed at the connection part between f and the seat pillar 2d7, and a drainage hole 16 is formed at the connection part of the seat pillar 2d and the cross pipe 21. As a result, overflow water from the drain pipe 12d of the recovery tank 12 is drained from the rubber hose 14. backstay 2f
, is guided to the lower end of the vehicle via the lower part of the seat pillar 2d, and is drained.

Next, the effects of this embodiment will be explained.

In the device of this embodiment, the expansion due to the temperature rise of the cooling water is
It passes from the radiator 18 through the rubber hose 17 and is stored in the recovery tank 12, where it cools and becomes liquefied again, and is stored in the recovery tank 12. When the engine temperature drops, the cooling water contracts.
This shrinkage is transferred from the recovery tank 12 to the radiator 18.
will be replenished. When the amount of cooling water from the radiator 18 increases and the liquid level in the recovery tank 12 exceeds a predetermined level, the drain pipe 12
overflow from d. This overflow water flows from the drain hose 14 to the backstay 2f and the seat pillar 2d.
The water is drained through the drain hole 16 to the lower part of the vehicle. Therefore, scattering of overflow water can be prevented, and problems such as dirt on passengers can be solved.

In order to drain such overflow water, the conventional structure uses a separate drainage tube, which makes the structure complicated, and there are also restrictions on the piping route and clamping method.

In contrast, in this embodiment, the backstay 2f.

Since the seat pillar 2d is used as a drain tube, a separate drain tube and clamp are not required, and the structure is simplified accordingly. Moreover, since a drain tube is not required, the piping work itself is also unnecessary, and there is no problem of interference with the rear arm or the like.

In the above embodiment, the recovery tank 12 is placed outside the triangular area, but this recovery tank may be installed near the 1891 area, such as inside the area.Also, in the above embodiment, the drain pipe 12d is Although it is connected to the backstay, it may also be connected to the seat pillar.In short, if the vehicle body frame is used as a drainage tube, the above-mentioned effects can be obtained.

Furthermore, although the above embodiment has been explained using a motorcycle as an example, the scope of application of the present invention is not limited to motorcycles. The present invention can be applied to any vehicle equipped with such a structure, and of course can also be applied to, for example, a straddle-type vehicle (ATV) for traveling on rough terrain equipped with ultra-low pressure width tires.

〔Effect of the invention〕

As described above, according to the recovery tank drainage structure according to the present invention, the drain port of the recovery tank is connected to the seat pillar or backstay and used as a drainage tube, so the configuration is simple and the rear arm etc. This has the advantage that there is no need to consider interference with moving parts.

[Brief explanation of the drawing]

1 to 3 are diagrams for explaining a drainage structure of a recovery tank according to an embodiment of the present invention, in which FIG. 1 is a side view thereof, FIG. 2 is a front view as seen from the front of the vehicle,
FIG. 3 is a side view of a motorcycle to which this structure is applied. In the figure, 1 is a motorcycle, 2 is a body frame, 2b
is the upper main pipe, 2d is the seat pillar, 2e is the seat rail, 2f is the backstay, 12 is the recovery tank, 12d is the drain pipe (drain port), and 16 is the drain hole. Patent Applicant Yamaha Motor Co., Ltd. Agent Patent Attorney Tsutomu Shimofu Figure 2

Claims (1)

[Claims] (1) In a vehicle equipped with a vehicle body frame in which a seat pillar extending downward from the rear of the main pipe and a seat rail extending rearward are connected in a substantially triangular shape by a backstay extending vertically, a recovery tank connected to a radiator The recovery tank is installed near the triangular area, and the recovery tank's drain port is communicatively connected to either the backstay or the seat pillar. Also, a drainage structure for a recovery tank for a vehicle, characterized in that a drainage hole is formed near a connection between the backstay and the seat pillar.