JPS6132101Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an engine cooling air passage structure for a power working machine.

Conventionally, in the case of a power working machine, for example a batshoe, the engine is mounted at the rear of the cabin, and the cooling air is discharged from the rear of the engine by an exhaust fan, and the cooling air is directed to the side of the engine room. However, since the cooling air intake passage communicates directly with the atmosphere from the engine room, the cooling effect is limited and there is a drawback that an efficient cooling function cannot be expected. Ta.

In this idea, a cooling air passage for the engine is formed between the fuel cylinder and the hydraulic oil tank for hydraulic operation, and the gap passage communicates with the engine room, thereby speeding up the intake of cooling air. It is an object of the present invention to provide an engine cooling air passage structure for a power working machine which can also serve as a cooling for a hydraulic oil tank and which can eliminate the above-mentioned drawbacks.

An embodiment of this invention will be described in detail based on the drawings. A is a backhoe as an example of a power working machine, and a machine body a is rotatably provided on a running section 1 via a turntable 2. A cabin 3 is mounted on the body a, and booms 4 and 5 are protruded from the front end of the fuselage a, and are configured to be operated by hydraulic cylinders 6 and 7, and a bucket 8 is mounted at the tip of the boom 5. They are installed consecutively.

Behind the cabin 3, there are fuel tanks 9 on the left and right sides.
and an engine room 10 are arranged side by side, and the engine room 10 protrudes further rearward than the fuel tank 9, and a hydraulic oil tank 11 is arranged behind the fuel tank 9 and on the left side of the engine room 10. There is.

The fuel tank 9 is a tank that stores fuel necessary for the engine E in the engine room 10. The engine room 10 forms an engine room covered with a bonnet 12, and the engine E is housed in the engine room. The exhaust fan 13 and the radiator 14 are arranged behind the engine E, and the rear bonnet located behind the radiator 14 is connected to the running part 1 to operate the running part 1. An air exhaust port 15 is provided on the side wall.

Further, the hydraulic oil tank 11 is an oil tank that serves as a pressure oil supply source for operating the hydraulic cylinders 6 and 7 to operate the booms 4 and 5, and the front and right sides are connected to the fuel tank 9 and the engine. room 10
Each is surrounded by

A cooling air passage S is formed with a certain gap between the rear wall of the fuel tank 9 and the front wall of the hydraulic oil tank 11, and the passage S is formed on the left side wall of the engine room 16. It is configured to communicate with the suction port 16 and allow cooling air to enter the engine room 10.

The cooling air passage S has a gap as small as possible and is covered with a covering part 17 that covers the upper surfaces of the fuel tank 9 and the hydraulic oil tank 11. It opens on the left side of 11, and communicates with the atmosphere through the opening 18.

Note that the cover plate 17 may not be provided and the upper part of the cooling air passage S may be left open, or the area for taking in the cooling air may be increased.

In the figure, 19 is an oil filler port of the fuel tank 9, and N is an arrow indicating the passage process of the cooling air.

The embodiment of this invention is constructed as described above, and when the engine E is activated to operate the backhoe A, the exhaust fan 13 is activated to cool the engine, and the cooling air is is taken in from the opening 18 of the cooling air passage S, passes through the cooling air passage S which is the gap between the fuel tank 9 and the hydraulic oil tank 11, enters the engine room 10 through the intake port 16, and enters the radiator 14. In the process of the cooling air being ventilated in the direction of arrow N, the rear wall of the fuel tank 9 and the front wall of the hydraulic oil tank 11 are The cooling air also cools the hydraulic oil tank 11 when passing between the cylinders, increasing the cooling effect of the hydraulic oil tank 11, which becomes heated due to hydraulic operation, and also because the cooling air passes through the narrow cooling air passage S. The passing speed of the cooling air is amplified, and the cooling air is quickly taken into the engine room 10 by the rapid intrusion operation, thereby improving the cooling effect.

According to this invention, since the cooling air passage is formed by a narrow gap between the fuel tank and the hydraulic oil tank, the cooling air can be taken into the engine room quickly, increasing the cooling efficiency, and Since the air passage faces the hydraulic oil tank, the hydraulic oil tank can be cooled at the same time, which has the effect of minimizing problems caused by heating of the hydraulic oil tank.

[Brief explanation of drawings]

Figure 1 is a side view of the proposed structure, Figure 2
The figure is a partially cutaway plan view of the main part. A: Backhoe, 3: Cabin, 9: Fuel tank, 10: Engine room, 11: Hydraulic oil tank, S: Cooling air passage.

Claims (1)

[Scope of utility model registration request] An engine cooling air passage structure for a power working machine, characterized in that a cooling air passage communicating with the engine room of the power working machine is formed with a gap between a fuel tank and a working oil tank adjacent to the tank.