JPH04219592A - Oil tank structure - Google Patents

Abstract

PURPOSE:To enhance maintenance performance of an oil tank for storing operating oil used for a hydraulic cylinder or the like and facilitate suction strainer replacing in a working vehicle by detachably installing an oil supply pipe, a suction pipe and a suction strainer together with a cap member. CONSTITUTION:A detachable cap member 12 is mounted on an oil tank 8. There are provided, in the cap member 12, a suction pipe 16 for a pump having a suction strainer 17 in the lower portion thereof and an oil supply pipe 15 for supplying oil. Therefore. the oil supply pipe 15, suction pipe 16 and suction strainer 17 can be detached together with the cap member 12.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of an oil tank installed in a working vehicle such as a construction machine or an agricultural tractor.

0002

2. Description of the Related Art A backhoe, which is an example of the above-mentioned work vehicle, is equipped with an oil tank for storing hydraulic oil for each hydraulic cylinder. Generally, such an oil tank is equipped with an oil supply pipe for replenishing hydraulic oil and a suction pipe for sucking hydraulic oil connected to a pump.
A suction strainer is provided at the bottom of the suction pipe.

0003

[Problems to be Solved by the Invention] When performing maintenance work on the oil tank as described above, such as cleaning the inside of the oil tank or replacing the suction strainer, it is necessary to remove the lid member of the oil tank and remove the oil tank from the opening of the lid member. You will have to put your hands in and do the work. In this case, there is a suction strainer and oil supply pipe inside the oil tank, so
It is difficult to work while avoiding this, and
It is also difficult to replace the suction strainer while inserting your hand through the opening of the lid member. An object of the present invention is to facilitate the above-mentioned maintenance work on an oil tank.

0004

[Means for Solving the Problems] The feature of the present invention is that the oil tank structure as described above is constructed as follows. That is, a removable lid member is provided on the upper surface of the oil tank, and a suction pipe for a pump having a suction strainer at the bottom and an oil supply pipe for replenishing oil are provided on the lid member.

[0005]

[Operation] With the construction as described above, when the lid member on the top surface of the oil tank is removed, the oil supply pipe, suction pipe, and suction strainer are removed together with this lid member. Therefore,
Since there is no oil supply pipe, suction pipe, or suction strainer inside the oil tank, it is easy to work by inserting your hand through the opening of the lid member. Furthermore, since the suction strainer can also be replaced outside the oil tank, the replacement work becomes easy.

[0006]

[Effects of the Invention] As described above, by providing the oil supply pipe and suction pipe to the existing lid member, maintenance work inside the oil tank and replacement of the suction strainer can be easily performed, improving work efficiency. We were able to improve this.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. As shown in FIG. 3, a boom 2,
A backhoe device 5 consisting of an arm 3, a bucket 4, etc., an operating lever 6 for the backhoe device 5 on the top surface of the machine,
A walk-behind backhoe, which is an example of a work vehicle, is provided with a step 7 for a worker at the rear of the machine body.

As shown in FIGS. 1 and 3, an oil tank 8 is arranged approximately at the center of the aircraft in the longitudinal direction so as to fall between the left and right traveling devices 1A and 1B. An engine 10 is arranged behind the pump 9. Further, on the upper front side of the oil tank 8, each hydraulic cylinder 13, 14 for the backhoe device 5 is installed.
A control valve 11 for supplying and discharging hydraulic oil from the pump 9 is disposed at the pump 9 and the like.

Next, the oil tank 8 will be explained. As shown in FIGS. 1 and 2, an opening 8a is provided on the upper surface of the oil tank 8, and a lid member 1 that closes this opening 8a.
2 is configured to be attachable and detachable to the upper surface of the oil tank 8 by means of bolts. An oil supply pipe 15 and a suction pipe 16 for replenishing hydraulic oil are fixed to the lid member 12, and the oil supply pipe 15 is usually equipped with a rubber cap 19.
is covered. A suction strainer 17 is provided at the lower part of the suction pipe 16, and the upper part of the suction pipe 16 is connected to the pump 9 via a rubber pipe 18.

With the above structure, the hydraulic oil sucked into the pump 9 from the suction strainer 17 through the suction pipe 16 is supplied from the pump 9 to each hydraulic cylinder 13, 14, etc. via the control valve 11. The hydraulic oil that has returned is returned to the oil tank 8 from the return port 8b shown in FIG. Further, a breather port 8c is provided next to the return port 8b, and as shown in FIGS. 1 and 2, a drain port 8d for draining the hydraulic oil is provided at the bottom of the oil tank 8. Then, from the suction pipe 16 to the rubber pipe 18
By removing the lid member 12 from the oil tank 8,
The oil supply pipe 15, suction pipe 16, and suction strainer 17 can be removed together with the oil supply pipe 15, suction pipe 16, and suction strainer 17.

Alternatively, the bottom of the oil tank 8 may be formed into an inclined surface so that metal powder, dirt, etc. can settle at the deepest part. In this case, a drain hole 8d shown in FIG. 2 is provided at the deepest part of the bottom.

[0012]Although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

[Figure 1] Longitudinal side view of the aircraft near the oil tank

[Figure 2]
Exploded perspective view of oil tank

[Figure 3] Overall side view of a walk-behind backhoe

[Explanation of symbols]

8 Oil tank 9 Pump 12 Lid member 15 Oil supply pipe 16 Suction pipe 17 Suction strainer

Claims (1)

[Claims] Claim 1: A removable lid member (12) is provided on the top surface of the oil tank (8), and a suction pipe (16) for a pump (9) equipped with a suction strainer (17) at the bottom and oil supply. An oil tank structure in which the lid member (12) is provided with an oil supply pipe (15) for use in the oil tank.