JPH09329024A - Reserve tank for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water leakage without providing a sealing member and enable a butting part between a cap and a main body of the cap to be easily manufactured. SOLUTION: On a part higher than the highest level of the storage of cooling water in a main body 2 of the tank, a projection 20 projecting inward is formed so that the tank main body 2 is separated to an upper side and a lower side, the projecting part being integral with the tank main body 2. In the case a vehicle body is vibrated largely at the running time and the like, the projection 20 suppresses a rise in the cooling water W level so that the leakage of the cooling water W from the butting part 19 between the cap 4 and the tank main body 2 can be prevented. Since the projection 20 prevents water leakage from the butting part 19, an attempt can be made to simplify the butting part 19 and the productivity can be improved. The sealing member used in the prior technique can be eliminated and the number of part items can be reduced. The projection 20 can be formed integrally with the main body 2 of the tank by means of a general blow formation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle reserve tank used in a vehicle engine cooling water system.

[0002]

2. Description of the Related Art An example of a conventional vehicle reserve tank is shown in FIGS. In FIG. 3, a vehicle reserve tank 1 includes a tank body 2 made of a transparent resin that stores cooling water W, and a substantially cylindrical cooling tank provided on the upper surface of the tank body 2 so that the cooling water W can be injected. The water injection part (cooling water injection water) 3, a resin cap 4 covering the cooling water injection part 3, and a hose 5 connected to the cap 4 and extended into the tank body 2 are generally configured. A substantially ring-shaped flange (hereinafter, referred to as an injection portion side flange) 6 protruding outward in the radial direction is formed on the tip end side of the cooling water injection portion 3.

Scales (not shown) are provided on the side surface of the tank body 2 for indicating the maximum level H of cooling water and the minimum level L of cooling water so that the amount of cooling water W stored can be confirmed.
6) is provided.

The cap 4 covers the cooling water injection part 3 and has a cap body 8 having a hose cylinder 7 for connecting the hose 5 to the center of the lower side, and a cap body 8 which is horizontally oriented on the upper surface side. The hose tubular portion 7 is formed so as to project
To the radiator 9 (see FIG. 2), the other end of which is connected to the radiator 9 (see FIG. 2), and the one end of which is formed so as to project in the horizontal direction on the upper surface side of the cap body 8 and the tank body 2 side. And an overflow cylinder portion 11 (see FIG. 5) communicating with the above. An annular groove 12 into which the injection portion side flange 6 is fitted is formed on the inner peripheral portion on the lower side of the cap body 8.

The above-mentioned vehicle reserve tank 1 is shown in FIG.
It is arranged in the engine room 14 of the vehicle 13 as shown in FIG. An engine 15, a radiator 9 and the like are arranged around the vehicle reserve tank 1.

Another conventional example of the vehicle reserve tank 1 is shown in FIGS. 5 and 6. In FIGS. 5 and 6, a rubber seal member 16 having a cylindrical shape with a lid is provided on the lower side of the cap body 8 so as to be inserted into the hose cylinder portion 7. An annular groove 16b into which the injection portion side flange 6 is fitted is formed on the inner peripheral portion of the tubular wall portion 16a of the seal member 16.

On the upper surface side of the cap body 8, a radiator cylinder portion 10 and an overflow cylinder portion 11 are formed to project in the horizontal direction. One end of the radiator tube 10 communicates with the hose tube 7, and the other end of the radiator tube 10 is connected to the radiator 9. In addition, the overflow cylinder 11
One end side of is communicated with the tank body 2 side. Further, in the side surface of the tank body 2, the parts corresponding to the maximum level H of cooling water storage and the minimum level L of cooling water storage are
"FULL" level line 17 and "LOW" level line 18 (scale) protruding outward and extending horizontally
Are formed so that the storage amount of the cooling water W can be confirmed.

[0008]

By the way, in the above-described vehicle reserve tank 1 shown in FIG. 3, when the vehicle 13 vibrates greatly while the vehicle is traveling, for example, as shown in FIG. Since the cooling water W in the main body 2 may rise along the wall surface of the tank main body 2 and reach the cap 4, it is possible to prevent water leakage from the mating portion 19 between the cap 4 and the tank main body 2. In addition, the mating portion 19 is required to be manufactured with high precision.

Further, in the vehicle reserve tank 1 shown in FIGS. 5 and 6, the sealing member 16 is provided to improve the sealing performance. However, since the sealing member 16 is provided, the number of parts is increased. However, there was a problem in that productivity would be inferior to that extent.

The present invention has been made in view of the above circumstances, and provides a reserve tank for a vehicle capable of preventing leakage of water without providing a sealing member and easily producing a mating portion between a cap and a cap body. The purpose is to do.

[0011]

In order to achieve the above object, the present invention has a tank main body for storing cooling water and a cap for covering a cooling water inlet provided on an upper surface of the tank main body. A protrusion projecting inward is formed above the preset maximum level of cooling water storage in the tank body so as to integrally separate the inside of the tank body into an upper side and a lower side. Is characterized by.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A vehicle reserve tank 1 according to an embodiment of the present invention will be described below with reference to FIG. It should be noted that members and portions equivalent to those shown in FIGS. 2 to 6 are designated by the same reference numerals, and their description and illustration will be omitted.
Omitted as appropriate. In FIG. 1, a substantially annular protrusion 20 protruding inward in a substantially horizontal direction is integrally formed with the tank body 2 above the cooling water storage maximum level H in the tank body 2. The inside of the tank body 2 is substantially separated by the projections 20 into upper and lower chambers 21 and 22.

In the vehicle reserve tank 1 configured as described above, the vehicle body vibrates greatly due to rough road traveling and the like, and the cooling water W in the tank body 2 temporarily rises on the wall surface of the tank body 2 (lower chamber 22). Even if the protrusion 20 is the cooling water W
Is prevented from entering the upper chamber 21. Therefore, it is possible to prevent the cooling water W from leaking from the joining portion 19 between the cap 4 and the tank body 2.

Since the rise of the cooling water W is suppressed and the cooling water W is prevented from leaking from the joining portion 19 between the cap 4 and the tank body 2, it is not necessary to produce the joining portion 19 with high precision. The mating portion 19 can be simplified and productivity can be improved. Since the seal member interposed between the cap and the tank body in the prior art is eliminated, the number of parts is reduced accordingly.

The protrusion 20 can be formed integrally with the tank main body 2 by, for example, general blow molding, whereby a special manufacturing method is not used.
Can be easily manufactured.

[0016]

According to the present invention, when the vehicle body vibrates greatly during traveling of the vehicle, even if the cooling water in the tank body rises on the wall surface of the tank body, the protrusions suppress the rise of the cooling water. Therefore, it is possible to prevent the cooling water from leaking from the joint portion between the cap and the cooling water injection portion.

Since the rise of the cooling water is suppressed to prevent the cooling water from leaking from the joint between the cap and the cap body, it is not necessary to manufacture the joint between the cap and the cap body with high precision. It is possible to improve the productivity by simplifying the mating part.

In the prior art, the seal member interposed between the cap and the tank body can be eliminated, and the number of parts can be reduced.

The protrusion can be formed integrally with the tank body by, for example, general blow molding, and thus can be easily manufactured without using a special manufacturing method.

[Brief description of drawings]

FIG. 1 is a sectional view showing a vehicle reserve tank according to a first embodiment of the present invention.

FIG. 2 is a plan view schematically showing a vehicle including a vehicle reserve tank.

FIG. 3 is a cross-sectional view showing an example of a conventional vehicle reserve tank.

FIG. 4 is a sectional view schematically showing a state of cooling water in the vehicle reserve tank.

FIG. 5 is a plan view showing another conventional example of a vehicle reserve tank.

FIG. 6 is a sectional view taken along the line AA of FIG. 5;

[Explanation of symbols]

 1 vehicle reserve tank 2 tank body 4 cap 20 protrusion 21 upper chamber 22 lower chamber

Claims (1)

[Claims] 1. A tank main body for storing cooling water, and a cap for covering a cooling water inlet provided on an upper surface of the tank main body, wherein the tank main body has a cooling water storage level higher than a preset maximum level. A reserve tank for a vehicle, characterized in that a protrusion projecting inward is formed in an upper portion so as to be integrally formed with the tank body so as to separate the inside of the tank body into an upper side and a lower side.