JPS6036753Y2 - reserve tank - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reserve tank mainly used in a cooling system for an internal combustion engine of an automobile.

A conventional reserve tank of this kind has a structure as shown in Fig. 1, with a water inlet 1a formed on the upper part of the tank body 1, and a cap 2 removably attached to the water inlet 1a via a sealing gasket 3. Two upper and lower pipe parts 2' and 2'' are integrally formed on this cap 2, a rubber hose 9 is connected to the lower pipe part 2'' with a clip 10, and the tip of this rubber hose 9 is connected to the bottom of the tank body 1. It is opened nearby.

Further, one end of a rubber hose 6 is connected to the upper pipe portion 2' by a clip 7, and the other end of this rubber hose 6 is connected to an overflow pipe of a water inlet of a radiator for cooling the internal combustion engine (not shown).

In addition, the cover 11 is fitted and fixed to the lower pipe part 2#,
The inside of the tank body 1 is opened to the atmosphere through the communication hole 110 of the cover 11, the communication space 4, and the atmosphere release hole 20 of the cap 2.

However, in the above structure, since the two upper and lower pipe parts 2' and 2'' are integrally formed on the cap 2, the overall shape of the cap 2 inevitably becomes complicated, and the molding cost of the resin cap 2 increases. .

In addition, since the lower pipe part 2'' is integrally molded with the cap 2, it is not advisable to make the required length for reasons of cap molding (for reasons such as reducing mold costs), and therefore, the rubber hose 9 is attached to the pipe. It has the disadvantage that it must be connected to section 2''.

The present invention has been made in view of the above points, and has a structure in which an L-shaped inlet/outlet pipe is formed independently from the cap, and this L-shaped inlet/outlet pipe is integrally connected to the cap, thereby improving the shape of the cap. An object of the present invention is to provide a reserve tank which can reduce the cap molding cost by simplifying the process and eliminate the conventional rubber hose in the tank body.

The present invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 2 to 5, reference numeral 1 denotes a tank body of a reserve tank, which is made of a transparent or translucent resin molded product (for example, polypropylene) so that the amount of cooling water inside can be easily inspected.

1a is a water inlet integrally formed in the tank body 1, and 1b is a flange portion of this water inlet 1a.

Reference numeral 2 denotes a cap made of a molded product of elastic resin (for example, polypropylene), which is removably fitted to the flange portion 1b of the water inlet 1a by utilizing the elastic deformation of the resin.

3 is a ring-shaped rubber sealing gasket interposed between the water inlet 1a and the cap 2; It is held at 2a.

2b is a semicircular ring-shaped protrusion that is integrally formed so as to protrude outward from the upper surface of the cap 2, and an atmosphere communication space 4 is formed between this protrusion 2b and the upper surface of the gasket 3. .

This protrusion 2b may have a ring shape.

2C is an atmosphere opening hole opened in the protrusion 2b, which opens the space 4 to the atmosphere.

Reference numerals 2d and 2e each indicate a groove forming a communication means for communicating the space 4 with the inside of the water inlet 1a, and are provided at a position not facing the atmosphere opening hole 2b, for example, at a 180° symmetrical position.

The groove portion 2d extends radially inward from the space 4 into the cap 2.
The groove 2e is formed in a part of the ring-shaped holding part 2a and communicates the groove 2d with the water inlet 1a.

2f is a pipe mounting hole provided in the center of the cap 2;
The long tube portion 5a of the letter-shaped inlet/outlet tube 5 is inserted and fixed therein.

The inlet/outlet pipe 5 has a long pipe part 5a and a short pipe part 5b integrally formed in an L shape, and is usually made of a resin molded product, but it can also be made of metal.

Reference numeral 2g designates a bifurcated tube holding portion projecting upward from the upper surface of the cap 2, and is used to press and hold the short tube portion 5b of the inlet/outlet tube 5 by utilizing the elasticity of the resin.

The L-shaped inlet/outlet pipe 5 has its short pipe part 5b pushed into the pipe holding part 2g of the cap 2, and its long pipe part 5a is inserted into the pipe attachment hole 2.
By press-fitting into the tube f, it can be fixed to the cap 2 with a one-touch operation, and the tube holding section 2g also serves to fix the inlet/outlet tube 5, prevent it from being pulled out, and determine the direction of the short tube section 5b.

Furthermore, since the inlet/outlet pipe 5 is L-shaped, the end opening position of the long pipe part 5a can always be positioned at an appropriate position near the bottom of the tank body by fitting the short pipe part 5b into the pipe holding part 2g.

6 is a connecting hose made of rubber, one end of which is connected to the short pipe portion 5b of the inlet/outlet pipe 5 by a wire clip 7;
The other end is connected to an overflow pipe 8b of a water inlet 8a of a radiator 8 for cooling the internal combustion engine.

8c is a royal lid having a pressure valve and a negative pressure valve.

The operation in the above configuration will be explained.

Now, when the temperature of the engine cooling water rises, the pressure valve of the pressure cover 8c of the radiator 8 opens due to volume expansion due to the temperature rise, and the cooling water in the radiator 8 flows through the connection hose 6 and the inlet/outlet pipe 5 to the tank body. Flow into 1.

Conversely, when the temperature of the engine cooling water decreases, the negative pressure valve of the pressure cover 8c of the radiator 8 opens due to volume contraction due to the temperature drop, and the cooling water in the tank body 1 flows through the inlet/outlet pipe 5 and the connecting hose 6. It is sucked back into the radiator 8.

Since the inside of the tank body 1 is opened to the atmosphere through the path of groove 2e-78 2d-space 4-atmosphere release hole 2c, the inside of the tank can be maintained at atmospheric pressure at all times.
Even if the water level of the cooling water in the tank body 1 changes suddenly due to vibrations, shocks, or driving in an enclosed area, the cooling water will be caught in the middle of the above-mentioned winding air release path and will not directly flow out of the tank. do not have.

6 to 11 each show other embodiments of the tube holding portion 2g, and FIG. 6 shows a bifurcated tube holding portion 2g having a shape that opens not upward but to the side.

2h is a handle portion of the cap 2. Figure 7 shows the tube holding part 2.
g is constructed using a locking piece 2j that can be bent at a hinge portion 21.

In FIG. 8, a tube holding portion 2g is constructed by a base portion 2 integrally molded with the cap 2 and a locking piece 21 made of a metal spring that is secured to the base portion 2k.

In FIG. 9, a tube holding portion 2g is constructed by a base portion 2 integrally formed with the cap 2 and a resin locking piece 21' that is locked to the base portion 2k.

FIG. 10 shows a structure in which the tube holding portion 2g shown in FIGS. 6 to 1 is more effective in preventing removal. A protrusion 5c is provided on the short tube portion 5b of the inlet/outlet tube 5, and this protrusion 5c is used to hold the tube. It is designed to fit into a recess 2m provided in the portion 2g.

In FIG. 11, two pipe holding parts 2g are provided symmetrically, so that the direction in which the short pipe part 5b of the inlet/outlet pipe 5 can be taken out can be arbitrarily selected from either the arrow A direction or the arrow port direction. .

As described above, in the present invention, the L-shaped inlet/outlet pipe 5 having the long pipe part 5a and the short pipe part 5b is formed independently of the cap 2, and the structure is such that both 2 and 5 are integrally connected. The shape of the cap 2 can be made simpler than that of the conventional cap 2, and there is an effect that the molding cost of the cap 2 can be reduced.

Further, there is no need to provide a rubber hose inside the tank body 1 as in the conventional case, and there is an effect that parts costs can be reduced.

Furthermore, the inlet/outlet pipe 5 is L-shaped, and by holding this short pipe part in a pipe holding part provided on the top surface of the cap 2, the tip opening position of the long pipe part 5a is always kept at an appropriate position near the bottom of the tank body. It has the effect of being able to position itself.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view of a conventional reserve tank, Fig. 2 is a longitudinal sectional view showing an embodiment of the reserve tank of the present invention, Fig. 3 is a sectional perspective view of the cap 2 shown in Fig. 2, and Fig. 4 is a longitudinal sectional view of a conventional reserve tank. FIG. 5 is an external view of the inlet/outlet pipe 5 shown in FIG. 2, and FIGS. 6 to 11 are top perspective views of the cap 2 showing other embodiments of the present invention. . 1...Tank body, 1a...Water inlet,
2...Cap, 2c...Atmospheric release hole, 2f...Pipe mounting hole, 3...Seal gasket, 5...L Shaped entrance/exit pipe, 5a...
...Long pipe part, 5b...Short pipe part.

Claims (1)

[Scope of utility model registration request] A water inlet is formed at the top of the tank body, a cap is removably attached to the water inlet and has an atmosphere vent hole and a pipe attachment hole, and the cap is L-shaped, with the long pipe portion of the cap attached to the cap. an inlet/outlet pipe which opens near the bottom of the tank body through a pipe attachment hole and whose short pipe part opens laterally above the cap; and an inlet/outlet pipe formed integrally with the cap on the upper surface of the cap. A reserve tank characterized in that the short pipe part of the inlet/outlet pipe is held by the pipe holding part, and thereby the opening position of the long pipe part of the inlet/outlet pipe is determined.