JPH049442Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an oil tank for storing oil to be supplied to a hydraulic cylinder of a ground work machine such as a tractor.

[Prior art]

Generally, in the oil tank and hydraulic cylinder of the hydraulic system of a tractor, etc., as the hydraulic oil moves, air moves (breathing effect) into the upper space on the oil tank side and the air chamber on the hydraulic cylinder side, respectively.
occurs. That is, when oil flows into the hydraulic cylinder from the oil tank via the pump, the volume of the air chamber of the hydraulic cylinder decreases, and with this decrease, the air in the air chamber is discharged into the cylinder. On the other hand, on the oil tank side, the amount of oil decreases as oil is supplied to the hydraulic cylinder, so the volume of the upper space of the tank increases and air flows into it.

[Problem that the invention attempts to solve]

In the conventional technology, when air flows into the upper space of the oil tank, outside air flows in through an opening that communicates the outside and inside of the oil tank, and contaminants such as dirt and dust contained in this outside air cause oil to leak. There was a problem that the water was contaminated.

The object of the present invention is to provide an oil tank in which oil is not contaminated when air flows into the oil tank.

[Means for solving problems and their effects]

The present invention provides an air cleaner element that captures contaminants in the air flowing into the tank body through the tank body opening in the cap attached to the opening. Prevent from entering inside.

〔Example〕

FIG. 1 is a partially omitted cross-sectional view of an embodiment of an oil tank according to the present invention. In this figure, the oil tank includes a tank body 4 that stores oil to be supplied to a hydraulic cylinder (not shown), and a cap 8 that is attached to an opening 6 that communicates the outside and the inside of this tank 4. There is. The cap 8 consists of a cap body 80, an air cleaner element 82, and a gauge 83. The cap body 80 consists of a lid part 81 and a cylindrical part 84 extending from the lid part 81 in the axial direction. The diameter of the outer circumference of the cylindrical portion 84 is equal to the diameter of the circumference of the opening 6. The inner surface of the lid part 81 has a recess 81A for an air passage.
and 81B are formed. The cylindrical portion 84 is provided with axially extending slits 84A, 84B, and 84C to form air passages. The element 82 is made of a cylindrical member made of urethane foam, for example, and is attached to the main body 8 of the cover.
An outer peripheral portion 85 having the same diameter as the diameter of the cylindrical portion 84 of
An inner peripheral part 86 having the same diameter as the upper cylinder part 87 of the gauge 83 is formed in the central axis direction, and this inner peripheral part 86 allows the upper cylinder part 8 of the gauge 83 to
7 serves as a through hole to be inserted. As shown in FIG. 3, the air cleaner element 82 is fitted between the cylindrical portion 84 of the cap body 80 and the upper cylindrical portion 87 of the gauge 83, and is bonded to both. The gauge 83 is made of nylon, for example, and includes the above-mentioned upper cylindrical portion 87 and this upper cylindrical portion 87.
4 for preventing oil scattering on the disc formed at the bottom of the
pieces of fins 88A, 88B, 88C and 88D
and an oil detection section 89 extending in the axial direction below these fins. The three lower fins 88A, 88B, and 88C are provided with cutouts 90A, 90B, and 90C, respectively, for forming air passages, and the upper fin 88D is provided with a hole 90D for air passage. .

In the oil tank 2 configured as described above, air flowing into the oil tank 2 from the outside first flows through the recesses 81A and 81B of the lid portion 81 of the cap body 80 and the slit 8 of the cylindrical portion 84.
4A, 84B and 84C into the air cleaner element 82. This element 82
This traps contaminants such as dirt and dust in the air. Therefore, the air from which contaminants have been removed flows through the holes 90D of the fins 88D and the fins 88C and 88B.
It flows into the interior of the oil tank 2 through the notches 90C, 90B and 90A of 88A. Therefore, the oil is not contaminated. Furthermore, in the above embodiment, since the air cleaner element 82 is disposed between the cap lid 81 and the upper cylindrical portion 87 of the gauge, the size of the oil tank 2 increases in order to remove contaminants. Moreover, the ease of handling the oil gauge is not impaired.

[Effect of idea]

As is clear from the above explanation, the present invention has an air cleaner element installed in the cap that is attached to the opening of the oil tank body, so that it prevents contaminants such as dust from entering as air flows in from the opening. Because the removal of
The internal oil will not be contaminated. Furthermore, although the oil stored in the oil tank may also be violently shaken up and down due to vibrations while the vehicle is running, even in such cases, the oil in the oil tank does not scatter to the outside through the opening.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of the oil tank according to the present invention, Figure 2 is an exploded front view of the cap shown in Figure 1, and Figure 3 is the cap shown in Figure 2. FIG. 3 is a front view showing the assembled state. 2...oil tank, 4...tank body, 6...
...opening, 8...cap, 82...air cleaner element.

Claims (1)

[Scope of utility model registration request] The oil tank body includes an oil tank body and a cap having an air passage that is attached to an opening that communicates the outside and the inside of the tank body, and an air cleaner element that captures contaminants flowing into the tank body is attached to the lid of the cap body. The upper pillar part of the gauge is inserted into the cylindrical part extending in the axial direction from the cap, and the upper pillar part of the gauge is inserted into the inner circumferential part formed in the central axial direction of the air cleaner element, thereby forming a gap between the cap and the gauge. An oil tank characterized by a detachable air cleaner element.