JPS5830962Y2 - reservoir tank - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reservoir tank (hereinafter simply referred to as a tank).

The purpose of this is to equip the tank with a dust-proofing device to prevent unfavorable effects on hydraulic equipment (for example, abrasion, unsmooth operation, etc.) caused by dust floating in the air.

In a tank provided in a hydraulic circuit, the oil level within the tank fluctuates up and down due to piston operation of hydraulic equipment and changes in temperature and the like.

In order to allow for this vertical fluctuation, an adjustment hole is generally provided to adjust the air pressure inside the tank, and a filter is fitted into the adjustment hole.

However, due to the ingress and egress of air, dust adheres to the filter and is sucked into the tank, causing the aforementioned undesirable effects.

As a means to eliminate the above-mentioned negative effects, there has been proposed a method in which another cover is attached to the upper surface of the reservoir cover and a ventilation hole is provided in the cover to communicate with the outside air, but the present invention further improves the dust removal effect. In order to facilitate this, a partition wall is provided in the chamber formed between the reservoir cover and another cover above the reservoir cover.

To explain the figure, 1 is a tank for a power steering device, and an inflow pipe 2 is fluid-tightly fixed to one side of the lower part of the main body to allow oil to flow into the tank 1 from the power steering device (not shown). An outflow pipe 3 for supplying oil to a pump (not shown) is similarly fixed to the other end.

A cylindrical cleaner 4 is fixed to the center of the interior of the tank 1 via a coil spring 7 via a bolt 5 and a nut 6VC inserted in the center of the main body.

At the upper end of the bolt 5, a reservoir cover 8 that airtightly and liquidtightly covers the upper surface of the main body of the tank 1 is fastened with a washer 9 and a nut 10, and a refueling hole 11 is airtightly fixed to the left side of the cover as seen in the figure. There is.

12 is a cover for the oil supply hole 11 and the pleaser hole 13 and the communication path 1.
4 allows the inside of the oil supply hole 11 to communicate with the outside air.

A strainer 16 made of a bottomed cylindrical net member 16A is fixed to the lower part of the oil supply hole 11 via a pipe 15.

The tubular body 15 is provided with a plurality of recesses 15A on its outer periphery to form gaps 15B, allowing communication between the inside of the tank and the inside of the oil supply hole.

Further, the net member 16A normally communicates the inside of the tank with the inside of the oil supply hole 11 through its mesh.

Although the above structure is the same as that of a conventional tank, in the present invention, a cover 17 having the following structure is detachably attached to the tank.

That is, the cover 17 is made of a flexible elastic material, is detachably attached to the reservoir cover 8, and has one or more ventilation holes 17A provided at its base to communicate the inside of the cover with the atmosphere.

17B is a partition wall that is buttoned in the chamber 18 formed between the lever cover 8 and the cover 17 and is integrally formed with the cover 17.

In this embodiment, the partition wall 17B (outer diameter d in the drawings) has a circular shape inscribed with the cover 17 (outer diameter D in the drawings) and has an eccentricity X, and has a cavity 19 and a chamber 18.
An annular passage 19A having a communication gap X' is formed.

(The partition wall is not necessarily limited to an inscribed circular shape.) Therefore, the open end 1 in the cavity 19 of the ventilation hole 17A
7c is desirably opened at a position above the lower edge of the skirt of the partition wall 17B.

In the present invention, with the above-described structure, the oil hydraulically applied within the tank body is returned through the inflow pipe 2, and the cleaner 4 removes impurities.

The purified oil after flushing is sent out again to the hydraulic equipment through the outflow pipe 3, but at this time, the oil level in the tank body 1 fluctuates up and down.

Due to this oil level fluctuation, the space above the oil level becomes negative or positive pressure, and assuming that the reservoir cover 8 is completely sealed, a vacuum phenomenon occurs and inhibits the flow and flow of oil. .

In order to facilitate this effect, the breather hole 13, the communication hole 14, and the
An oil supply hole 11, a pipe body 15, etc. are provided.

Although the strainer 16 made of the net member 16A removes dust floating in the air during breathing, the dust accumulates in this strainer and falls into the tank during inhalation, causing the inconvenience.

In the present invention, the dust that hits the strainer is greatly reduced by the cover 17 having the partition wall 17B.

As the oil level fluctuates up and down, the cover 17 breathes as shown by the two-dot chain line, but since the partition wall 17B is provided, the chamber 18
Fluctuations in the amount of air are once assisted by the cavity 19.

That is, at the time of inhalation, the air in the cavity 19 flows through the ventilation hole 17A.
It is sucked in with priority over the outside air introduced from the outside, and the opposite effect occurs when it is exhausted.

In addition, since the outside air supplied from the vent hole 17A can be temporarily blocked by the partition wall, dust adhering to the strainer can be largely blocked, and the oil in the tank can be maintained in a purified state for a long time, achieving the desired purpose. It is.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view of a reservoir tank according to the present invention. 1...Tank body, 2...Inflow pipe, 3
...Outflow pipe, 4...Cleaner, 8...
... Reservoir cover 11 ... Oil supply hole, 16
...Strainer, 17...Cover 1
7A...Vent hole, 17B...Bulkhead, 1
8...chamber, 19...hollow.

Claims (1)

[Scope of utility model registration request] It has a first cover 8 that covers the upper opening of the tank, and a second cover 17 provided above the first cover, and a chamber 18 provided between the two force bars communicates with the inside of the tank. Then, by pressing a button on a reservoir tank that communicates with the atmosphere through a vent hole 17A provided in the second cover, the second cover is pressed from the inner surface of the top wall of the second cover toward the first cover. A partition wall 17B is integrally extended, and the side wall of the second cover and the partition wall form a cavity 19 that communicates with the atmosphere through the ventilation hole, and between the lower end of the partition wall and the first cover. a gap X that communicates the chamber and the cavity;
', and the atmosphere communicates with the inside of the tank via the vent hole 17A, the cavity 19, the gap Xz chamber 18, and the first cover.