JPS6123611Y2 - - Google Patents

Description

[Detailed description of the invention] This invention uses an air bleed pipe with a hanging part that hangs down inside the tank body to prevent coolant from leaking due to acceleration, deceleration, shaking, etc. of the vehicle. This invention relates to a reservoir tank for an automobile radiator.

In order to simplify the maintenance of the coolant in the radiator, a reservoir tank is often placed close to the radiator.
It is necessary to communicate the inside of the reservoir tank with the atmosphere. Therefore, conventionally, for example, as shown in FIGS. 7 and 8, by opening a small hole b in a cap a, or by providing an air hole consisting of a labyrinth-like pore d in a protrusion c of a cap, the inside and outside can be connected. It has allowed the air to communicate. However, with such air holes, for example, when the coolant in the tank is pressed against the front and rear walls of the tank due to inertia caused by the acceleration or deceleration of the car, and at the same time bounces back, the splashed coolant remains as it is. Although it is not possible to prevent the liquid from passing through the hole b and leaking to the outside, and it is possible to prevent the splashed liquid from directly passing through the labyrinth-like pore d, the water adhering to the hole d can still be prevented. There have been problems such as leakage of air to the outside due to fluctuation of the tank or change in internal pressure due to inflow of coolant, and insufficient air removal effect because the diameter of the hole cannot be made too large.

The purpose of the present invention is to provide a reservoir tank for an automobile radiator that can solve these problems, and the present invention will be described in detail below based on one embodiment.

1 to 4, a reservoir tank 1 for an automobile radiator according to the present invention includes a tank body 2 having a slightly elongated rectangular parallelepiped shape, and a cooling liquid inlet 3 formed in the upper wall of the tank body 2, which is crowned by a peripheral wall 4. Cap to wear 5
The tank body 2 is connected to a boss portion 9 at the upper end of the radiator 7 into which, for example, a pressure type radiator cap 8 is inserted, through a connection hose 6 connected to the bottom portion. The cap 5 has a horizontal portion 10 extending radially outward from the center thereof, and a hanging portion 11 extending downward at the center of the cap.
Inside, an air vent pipe 13 communicating with an air hole 12 having a diameter d of approximately 4 mm in this embodiment is molded integrally with the cap 5.

The length ₁ of the horizontal portion 10 is about 15 mm, and the lower edge of the inner periphery of the air hole 12 passing through the horizontal portion 10 is formed to be substantially flush with the top surface 5a of the cap. Further, the lower end of the hanging portion 11 is formed into an inclined cut 14 that slopes up at an angle of about 30° with the horizontal line toward the direction in which the horizontal portion 10 is formed, and extends from the lower surface 5b of the cap to the lower end 14a of the inclined cut 14. about
The length ₂ is about 18-19mm, while the inlet 3
Since the height h of the peripheral wall 4 is set to about 10 mm, the lower end 14a of the hanging portion 11 hangs down from the upper inner surface 2a of the tank body 2 by about 8 to 9 mm. Note that the liquid level L of the coolant is set so that there is a gap g between it and the lower end 14a of the hanging portion 11 even at its maximum raised position. At the periphery of the cap 5, a fitting 16 having an annular portion 15 at the tip is attached to the horizontal portion 1.
A horizontal projecting piece 17 for removing the cap is provided on the opposite peripheral edge.

The tank body 2 is mounted with its long side aligned with the traveling direction of the automobile, and has a locking portion 1 on its upper surface to which the annular portion 15 of the mounting tool 16 can be locked.
8 is formed at a predetermined distance from the tank inlet 3 in the backward direction of the vehicle, the inclined cut 14 at the lower end of the hanging portion 11 of the air vent pipe 13 opens in the reverse direction of the vehicle. .

However, since the air bleed pipe 13 of the reservoir tank 1 for an automobile radiator according to the present invention has the hanging part 11, even if the coolant enters from the lower end opening of the air bleed pipe 13, its force is reduced by the hanging part 11. It falls into the tank without leaking outside. Further, the diameters of the air bleed pipe 3 and the air hole 2 can be made relatively large, and the air bleed effect can also be improved. Furthermore, since the slanted cut 14 is opened rearward, the front edge of the slanted cut 14 prevents the coolant from splashing against the front wall 2b of the tank body 2 during sudden deceleration when normally a large inertial force acts. This more reliably prevents the cooling liquid from flowing into the inclined cut 14. Furthermore, the horizontal portion 10 of the air vent pipe 13 prevents foreign matter from entering from below.

As mentioned above, the tank of the present invention uses an air bleed pipe with a drooping part to provide continuity between the inside and outside of the tank body, thereby preventing leakage of coolant in the reservoir tank due to vibrations, vibrations, and acceleration/deceleration of the vehicle. This can be reliably prevented, the decrease in coolant can be prevented, and it can be produced at low cost, etc., and other excellent effects can be achieved.

In addition, in the tank of the present invention, as shown in FIGS. 5 and 6, a cutout groove 14b may be provided on the backward movement side of the hanging portion 14 instead of the inclined cutout 14, or a simple horizontal cutout 14c may be formed. cap 5
Alternatively, the air bleed pipe 13 can be attached to the tank body 2.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view showing an example of the use of the device of the present invention, Fig. 2 is a side view showing an embodiment of the device of the present invention, Fig. 3 is a partial sectional view taken along the line A-A, and Fig. 4 is a partial perspective view showing an example of the use of the device of the present invention. The figure is a partial sectional view taken along the line B-B, FIGS. 5 and 6 are partial perspective views showing other examples of the lower end of the hanging portion, and FIGS. 7 and 8 are partial views illustrating conventional air holes. 2: Tank body, 5: Cap, 11: Hanging part, 12: Air hole, 13: Air vent pipe, 1
4: Slanted cut.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An air vent pipe that hangs down inside the main body of the air vent pipe and opens its hanging part above the level of the coolant inside the tank body, thereby communicating the inside and outside of the tank. Features: Reservoir tank for automobile radiators. (2) The reservoir tank according to claim 1, wherein the air vent pipe is attached to the cap. (3) The reservoir tank according to claim 2, wherein the lower end of the hanging portion has an inclined cut cut upward in the direction in which the vehicle moves backward.