JPS5921940Y2 - Cooling air passage structure of radiator in power working machines - Google Patents

Description

[Detailed description of the invention] This invention relates to a cooling air passage structure for a radiator in a power working machine.

Generally, the engine section of a power working machine is often provided at the rear of the machine body, and the radiator in the engine section is provided facing the side wall of the hood.

The air passage for the cooling fan of the radiator is configured such that an exhaust port is provided on the side wall of the bonnet facing the radiator, and the air is discharged to the outside air through the exhaust port.

In this way, if the work machine is of different types in front and behind the machine (for example, a work machine that has an excavator and a leveling machine), which frequently moves forward, backward, or turns, it is possible to Or, when turning, the side wall of the bonnet receives wind while the vehicle is running, and the wind flows into the bonnet from the exhaust port provided on the side wall, and the hot air that should be exhausted from inside the bonnet flows back into the bonnet, preventing the use of the cooling fan. It had the disadvantage of not being able to accomplish this.

This proposal was developed in view of the above-mentioned drawbacks, and by oriented the air path of the radiator cooling fan vertically, it disperses the hot air inside the bonnet, and also prevents the wind from flowing back into the bonnet when the aircraft is moving backwards. It is an object of the present invention to provide a cooling air passage structure configured to prevent dust from traveling equipment from being scattered due to dispersed downward exhaust gas.

In this case, a rotating machine stand 5 is provided above the traveling device 4, a frame plate 18 is provided protruding from the rear surface of the rotating machine stand 5, and an engine section 7 equipped with a radiator 10 with a cooling fan 11 provided on the back side is installed. In a power working machine in which the radiator 10 is disposed at the rear of the stand 5 and faces the rear side wall 9' of the bonnet 9 with a ventilation space S, the ventilation space S is divided into an upward air passage 14 by a partition plate 13. and a downward air passage 15, and the upward air passage 14 is communicated with the outside air through an exhaust port 17 provided in the earthen wall 9'' of the bonnet 9, and the downward air passage 15 is connected to the air through the deflection plate 21. A cooling air passage structure for a radiator, characterized in that the spaces 1 and 9 inside the frame plate 18 communicate with each other, and the lower opening 20 of the space 19 serves as an exhaust port not facing the traveling device 4 and communicates with the outside air. A is a power working machine that is equipped with an excavator 1 at the front of the machine body and a leveler 2 at the rear of the machine body, and is explained based on the embodiment shown in the drawings. A swing machine stand 5 is provided above the track traveling device 4, a driver's seat 6 with a cabin is arranged on one side of the front part of the machine stand 5, and an engine part 7 is arranged on one side of the rear part.

Further, a frame plate 18 is provided protruding from the rear surface of the machine stand 5, and a space 19 inside the frame plate 18 is formed by an opening 2 on the lower surface thereof.
0 is provided at a position farther back from the rear end of the crawler belt 3 of the traveling device 4.

The engine section 7 is covered with a bonnet 9 having an opening 8 on the lower surface, and a radiator 10 in the engine section 7 is disposed at a position facing a rear wall 9' of the side wall of the bonnet 9 while maintaining a ventilation space S therein.

A cooling fan 11 is provided on the back of the radiator 10, and the cooling fan 11 is provided on a rotating shaft 11' directly connected to the crankshaft of the engine 12.
It rotates in conjunction with the rotation of the radiator 2, and the direction of its blades is set so that air is blown from the back of the radiator 10, through the core, and into the air blowing space S from the front.

The inside of the ventilation space S above the rear end of the crawler track 3 is divided into an upward air passage 14 and a downward air passage 15 by a partition plate 13 provided on the inner surface of the rear side wall 9' of the bonnet 9. , is horizontally installed at approximately the same level as the center of the radiator 10 in a downwardly inclined state toward the ventilation space S from the attachment base end to the inner surface of the rear side wall 9'.

Therefore, the inclined upper surface 13' and the inclined lower surface 13'' of the partition plate 13 are connected to the upward air passage 14 and the downward air passage 15, respectively.
Acts as a direction guide surface.

An exhaust port 17 with a screen 16 is provided in the earthen wall 9'' of the bonnet 9 above the ventilation space S, and the upward air passage 14 is communicated with the outside air through the exhaust port 17.

Further, a deflection plate 21 is provided at the lower end of the downward air passage 15, and the deflection plate 21 is tilted downward from the base end where it is attached to the rear end of the machine base 5 and is tilted horizontally. The inclined upper surface 21' acts as a direction changing guide surface for the downward air passage 15.

Then, the downward air passage 15 and the space 19 in the frame plate 18 are communicated via the deflection plate 21, and the lower opening 20 of the space 19 is used as an exhaust port not facing the traveling device 4, and is communicated with the outside air. Therefore, the downward air path 15
communicates with the space 19 via the deflection plate 21, and further communicates with the space 1
It communicates with the outside air through the lower opening 20 of 9.

In addition, the reference numeral 22 in the figure is the opening/closing axis of the bonnet 9, and 23
The generator 24 is a fan belt.

Therefore, when the extra fan 11 rotates in conjunction with the engine 12, the cooling air from the fan 11 is transferred to the radiator 10.
When passing through the core, the hot air from the radiator 10 is absorbed and a cooling effect is achieved, and the cooling air becomes hot air and is blown into the ventilation space S.

The hot air is dispersed vertically within the ventilation space S by the partition plate 13, and the hot air directed upward is discharged to the outside air through the upward air path 14, and the hot air directed downward is dispersed from the downward air path 15. It is guided backward by the facing plate 21 and enters the space 19 of the frame plate 18, and is discharged from the space 19 to the outside air through the lower opening 20. In this case, the lower opening 20 is connected to the crawler track 3. Since the exhaust ports are arranged in opposite directions, the dust on the crawler track 3 will not be scattered by the downward exhaust.

In addition, the wind when the aircraft is moving backwards is blocked by the rear side wall 9' of the bonnet 9, so that it does not flow into the bonnet 9 and cause hot air to flow backward.

Since the present invention is configured as described above, the cooling air from the cooling fan 11 accompanying the cooling of the radiator 10 is dispersed vertically, which not only improves the heat dissipation efficiency, but also prevents the backflow of hot air caused by the running wind, unlike in the past. Therefore, cooling fan 1
Reliable cooling can be performed without interfering with the cooling effect of 1, and furthermore, since the downward exhaust is discharged from the exhaust port not facing the crawler 3, the dust on the crawler 3 can be scattered by the exhaust. This has the effect that there is no risk of degrading the working environment.

[Brief explanation of drawings]

FIG. 1 is an overall side view showing a power working machine according to an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional view of the engine section. 4: Traveling device, 5: Swivel base, 7: Engine section, 8: Bottom opening, 9: Bonnet, 9': Rear side wall, 9'': Top wall, 10: Radiator, 11: Cooling fan, 13: Partition Board, 14: Upward air path, 15: Downward air path, 17: Exhaust port, 18: Frame board, 19: Space, 20: Bottom opening, 21
: Direction plate, S: Ventilation space.

Claims (1)

[Scope of utility model registration request] A rotating machine stand 5 is provided above the traveling device 4, a frame plate 18 is provided protruding from the rear surface of the rotating machine stand 5, and an engine section 7 equipped with a radiator 10 with a cooling fan 11 provided on the back side is attached to the machine stand 5. In a power working machine in which the radiator 10 faces the rear side wall 9' of the bonnet 9 while holding the ventilation space S, the ventilation space S is divided into an upward air passage 14 and a downward air passage 14 by a partition plate 13. The upward air passage 14 is communicated with outside air through an exhaust port 17 provided in the earthen wall 9'' of the bonnet 9, and the downward air passage 1 is partitioned into an air passage 15.
5 is communicated with the space 19 in the frame plate 18 through the deflection plate 21, and the lower opening 20 of the space 19 is connected to the traveling device 4.
A cooling air duct structure for a radiator characterized by having an exhaust port communicating with the outside air as a non-facing exhaust port.