JPS609058Y2 - Oil tank structure of work vehicle - Google Patents

Description

[Detailed description of the invention] This invention is an engine bonnet that can swing open and close around the axis on one end side, and an engine fuel oil tank that has a fuel filler port with an intake and exhaust port that can swing freely. The purpose is to prevent oil from leaking from the oil filler port even when the engine bonnet is opened, by simple modification of the oil tank structure of the installed work vehicle.

Next, embodiments of the present invention will be described based on the drawings.

A driving unit 1 is provided at the front of the wheeled traveling machine, and a driving unit 2 is provided at the rear thereof, and a vertically swingable lift arm 3 connects a rotary tiller or the like such that it can be operated up and down;
The agricultural tractor is equipped with a power take-off shaft 4 for transmitting power to a connected working device at the rear of the machine, so that various working devices can be connected to the rear of the machine.

An engine bonnet 5 is provided on the driving unit 1 so as to be able to swing open and close up and down about an axis 2 in the longitudinal direction of the aircraft, which is located on one side of the aircraft, and an auxiliary oil tank 6 for engine fuel is provided on the bonnet 5. The intake/exhaust lower and cap 8
The oil filler port 9-shaped cylinder body 1 of the oil tank 6 is equipped with
0 is made to penetrate the engine bonnet 5 and protrude above it.

As shown in FIGS. 2 to 4, the lower end side of the cylindrical body 10 forming the fuel filler port 9 extends toward the bottom surface of the tank 6, and a notch 11 is provided in the cylindrical body 10 to enable intake and exhaust. It is located at a portion corresponding to the swing axis P side of the engine bonnet 5 in the circumferential direction.

The operation of this configuration will be explained next.

In the state shown in FIG. 2 with the engine bonnet 5 closed, the inside of the oil tank 6 is always maintained at positive pressure (atmospheric pressure) through the intake/exhaust lower and the notch 11.

When the bonnet 5 is opened in this state with a large amount of oil in it, for example for the purpose of inspecting the engine, as shown in Fig. 4, the notch 11 is hidden under the oil level and the two parts separated by the oil are removed. Two air pockets 12 and 13 are formed within the tank 6.

The first air reservoir 12 is formed by the cylindrical body 10, and the second air reservoir 13 is formed in a closed space above the oil tank 6.

The first air pocket 12 communicates with the outside air at the intake and exhaust lower,
Since the liquid level inside the cylinder is higher than the lower end of the cylinder 10 and the notch 11,
The flow of outside air from the first air reservoir 12 into the second air reservoir 13 located above is blocked by oil.

Therefore, since the air that replaces the oil above the first air reservoir 12 does not flow into the second air reservoir 13,
Although it is located above the first air reservoir 12, it does not flow into the cylindrical body 10, and oil leakage from the intake and exhaust lower when the oil tank is collapsed six times is prevented.

At this time, the sealed second air reservoir 13 has a negative pressure due to the weight of the oil that is about to flow into the cylindrical body 10.

The lower end of the cylindrical body 10 may be connected to the bottom wall of the tank 6, as shown in FIG. It is possible to change the partition wall member to a U-shaped or V-shaped partition member, etc. In short, when the tank 6 is turned over, the first air pocket 12 and the second
The air pocket 13 is divided from the first air pocket 12 to the second air pocket 1.
Any partition wall 10 may be formed as long as it prevents air from flowing into the partition wall 10.

Further, the oil tank 6 may be a main tank for engine fuel oil.

In summary, the present invention provides an oil tank structure for a work vehicle as described at the beginning of the detailed description, in which an oil filler port with an intake/exhaust lower is attached to the engine bonnet 5, which is configured to swing open and close around the axis 1 on one end side. 9, a working vehicle is equipped with an engine fuel oil tank 6 equipped with a fuel filler port 9, and a tank 6 is placed in the tank 6 on the opposite side of the shaft center P and near the fuel filler port 9 by sandwiching the fuel filler port 9, and when the bonnet 5 is opened. A partition wall 10 is provided to prevent air from the oil filler port 9 from flowing into the space above the tank when the oil tank 6 is turned over, resulting in the following effects.

In other words, by simply adding the bulkhead 10, even if the oil tank is turned over while still containing a large amount of oil, the oil will not reach the intake/exhaust lower or the tank 6, as explained in the embodiment. There is no longer any leakage from the gap in the oil filler cap 8, and troubles such as oil loss caused by opening the bonnet can now be prevented while being advantageous in terms of cost and production.

[Brief explanation of drawings]

The drawings show an embodiment of the oil tank structure for a working vehicle according to the present invention, FIG. 1 is a side view of an agricultural tractor, FIG. 2 is a cross-sectional front view showing the main parts, and FIG. (2) A cross-sectional view in the direction of arrows, FIG. 4 is a cross-sectional front view showing the tank in a rotated state, and FIG. 5 is a cross-sectional front view showing another implementation structure of the main part. 5...bonnet, 6...oil tank, 7...intake/exhaust port, 9...fuel filler port,
10... Bulkhead, 11... Notch, 12.
...First air pocket, 13...Second air pocket, P...Axis core.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ Work in which an engine fuel oil tank 6 equipped with an oil filler port 9 with an intake/exhaust lower is attached to an engine bonnet 5 that can swing open and close around the axis 2 on one end side. In a vehicle, when the oil tank 6 is rotated with the opening of the bonnet 5, the fuel filler port 9 is located in the tank 6 on the opposite side of the axis P across the fuel filler port 9 and near the fuel filler port 9. This oil tank structure for a working vehicle is provided with a partition wall 10 that prevents air from flowing into the space above the tank. (2) The partition wall 10 is a cylindrical body extending from the oil filler port 9 toward the bottom surface of the oil tank 6, and is located on the cylindrical body in the circumferential direction on the swing axis P side of the engine bonnet 5. An oil tank structure for a working vehicle as set forth in claim (2) of the utility model registration claim, characterized in that a notch 11 is provided in a portion where the oil tank is cut out. (2) The oil tank structure for a working vehicle as set forth in claim (2), wherein the lower end of the cylindrical body is connected to the bottom wall of the oil tank 6.