JP2560332Y2 - External air introduction filter mounting structure for air conditioner of construction machinery - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting an outside air introduction filter for an air conditioner of a construction machine.

[0002]

2. Description of the Related Art In order to make it possible to operate a construction machine such as a bulldozer under comfortable conditions and thereby to improve work efficiency, various improvements have been made with respect to improving the livability of a driver's seat. As one of them, an air conditioner (hereinafter, referred to as an air conditioner) is installed in a cab. The outside air taken in from the openings provided on the left and right side surfaces of the filter case 8 is filtered by the filter body 9 and then supplied to the air conditioner through the air duct 7.

[0003]

[Problem to be solved by the invention] In the case of a bulldozer,
When the filter case protrudes from the upper surface of the engine hood as described above, the front view is impaired, and it is not preferable from the viewpoint of external design. However, when the outside air introduction filter for an air conditioner is to be stored in the engine hood, it is necessary to reduce the size of the filter due to the restriction on the storage space in the engine hood. In addition, since the conventional air introduction filter for air conditioners introduces outside air from the side of the filter case, it does not suck rainwater even in rainy weather, but when the filter is stored in the engine hood, it is provided on the upper surface of the engine hood. Air will be sucked in from the opening
During rainy weather, rainwater may be sucked in at the same time. The present invention has been made in view of the above-mentioned conventional problems, and has an external air introduction filter mounting structure for an air conditioner of a construction machine which can improve visibility of an upper surface of an engine hood and prevent rainwater from entering. It is intended to provide.

[0004]

In order to achieve the above object, a structure for mounting an outside air introduction filter for an air conditioner of a construction machine according to the present invention covers a notch provided on an upper surface of an engine hood with the notch. A filter lower support plate is attached to the bottom of the filter case fixed below the cutout hole so as to surround the lower part of the filter body, and a filter cover for covering the filter case is provided. A filter upper support plate is fixed to the lower surface of the filter body so as to surround the upper part of the filter body, and when the cover is closed and hooked on the engine hood, the cover presses down the filter cover, thereby lowering the filter lower support plate and the filter upper part. The support plate sandwiches the filter body and sucks it through the outside air introduction hole provided in the cover. The introduced outside air is introduced into the air conditioner through the filter body from the cutout portion provided in the filter upper support plate, and rainwater that has entered through the outside air introduction hole is dropped from the periphery of the filter cover to the periphery of the filter case, and then the periphery of the filter case It was configured to be discharged from a drain hole provided on the bottom of the part.

[0005]

According to the above construction, an openable / closable cover for covering the notch hole is attached to the notch hole provided on the upper surface of the engine hood, and the filter case fixed below the notch hole is provided on the bottom surface of the filter case. The filter lower support plate is fixed so as to surround the lower part of the filter main body, and the filter upper support plate is fixed to the lower surface of the filter cover covering the filter case so as to surround the upper part of the filter main body. When the filter is closed and hooked on the engine hood, the cover pushes down the filter cover, and the filter body is sandwiched between the filter lower support plate and the filter upper support plate. Then, the outside air sucked from the outside air introduction hole provided in the cover is introduced into the air conditioner through the filter body from the cutout portion provided in the filter upper support plate, and the rainwater entering through the outside air introduction hole in rainy weather is filtered by the filter. It falls from the periphery of the cover to the periphery of the filter case, and is discharged from a drain hole provided in the bottom surface of the periphery of the filter case. With such a structure, the outside air introduction filter for the air conditioner can be housed inside the engine hood, and it is possible to prevent rainwater from entering the outside air introduction filter for the air conditioner.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an embodiment of a structure for mounting an outside air introduction filter for an air conditioner of a construction machine according to the present invention. FIG. 1 is an explanatory cross-sectional view around the outside air introduction filter for an air conditioner mounted in an engine hood. A cover 2 that covers the notch hole 1a is attached to a portion of the notch hole 1a provided in the engine hood 1 so as to be openable and closable around a hinge 2a. A lock 2b is attached to the lower surface of the cover 2, and the lock 2b is attached to a lock receiving plate 1b welded to the engine hood 1.
By locking the b, the cover 2 can be fixed to the engine hood 1. A punching metal 2c is welded to an outside air intake hole provided in the cover 2, and a holding plate 2d is welded to a lower surface of the cover 2.

A boss 1d is welded to the lower surface of the engine hood 1 via a rib 1c provided so as to surround the notch 1a, and the filter case 3 is secured by a bolt 4 screwed to the boss 1d. A seal 3a fixedly suspended in the engine hood 1 and attached to an upper edge of the filter case 3 is in close contact with the lower surface of the rib 1c. A vertically lower rising filter lower support plate 3b is welded to the inner bottom surface of the filter case 3 so as to surround the filter main body 5, and the filter main body is attached via a seal 3c attached to an upper edge of the filter lower support plate 3b. 5 is placed. Further, a number of small holes through which the filtered outside air passes are provided in a portion of the bottom surface of the filter case 3 surrounded by the filter lower support plate 3b. Filter cover 6 for covering the filter body 5
A filter cushion 6a is fixed to the upper surface, and a filter upper support plate 6b is vertically welded to the lower surface so as to surround the filter body 5. A seal 6c is attached to the lower end of the filter upper support plate 6b, and when the cover 2 is closed and hooked on the engine hood 1, the pressing plate 2d compresses the rubber cushion 6a and pushes down the filter cover 6. The filter body 5 is held between the filter lower support plate 3b and the filter upper support plate 6b. In order to allow the outside air sucked from the punched metal 2c to enter the filter body 5, the filter upper support plate 6
b is partially provided with a notch. Further, on the bottom surface of the filter case 3, a drain hole 3d is provided in a peripheral portion except for a portion surrounded by the filter lower support plate 3b.

The outside air introduced into the air conditioner enters the engine hood 1 from the outside air intake hole where the punching metal 2c of the cover 2 is welded as shown by an arrow in FIG. The filter enters the filter main body 5 from the cutout portion of the upper support plate 6b. Then, the outside air filtered in the filter main body 5 passes through a small hole provided in the bottom surface of the filter case 3, enters the air duct 7 from the lower case 3e, and is supplied to the air conditioner.

In rainy weather, raindrops also enter the engine hood 1 from the outside air intake hole. It is discharged from 3d. Therefore, it does not enter the filter body 5. In addition, the filter body 5 opens the cover 2 and the filter cover 6
Is removed, the filter body 5 can be easily removed, so that cleaning and replacement of the filter body 5 can be performed extremely easily.

[0010]

As described above, according to the present invention, a filter case for accommodating an external air introduction filter for an air conditioner is provided in an engine hood, and a filter lower support plate fixed to the filter case and a filter provided on a filter cover. Since the filter body is sandwiched between the upper support plate and the outside air is introduced into the filter from the cutout provided in the filter upper support plate, the outside air introduction filter for the air conditioner does not protrude on the upper surface of the engine hood. The visibility of the upper surface of the engine hood can be improved. Also, in rainy weather, the raindrops falling on the filter flow on the filter cover and are discharged from the drain holes provided on the bottom surface of the peripheral edge of the filter case, so that the raindrops can be prevented from entering the filter. . Furthermore,
In the present invention, since the filter is easily attached, the filter can be cleaned and replaced very easily.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional view around an external air introduction filter for an air conditioner mounted in an engine hood.

FIG. 2 is an explanatory view showing a mounting structure of a conventional external air introduction filter for an air conditioner provided on an upper surface of an engine hood.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine hood 1a Notch hole 2 Cover 3,8 filter case 3b Filter lower support plate 3d Drainage hole 5,9 Filter body 6 Filter cover 6b Filter upper support plate

Claims (1)

(57) [Scope of request for utility model registration] An openable / closable cover for covering the notch hole is attached to a notch hole provided on an upper surface of an engine hood, and a filter body of a filter body is fixed to a bottom surface of a filter case fixed below the notch hole. The filter lower support plate is fixed so as to surround the lower part, and the filter upper support plate is fixed to the lower surface of the filter cover that covers the filter case so as to surround the upper part of the filter body. The cover pushes down the filter cover when hooked on the hood,
The filter lower support plate and the filter upper support plate sandwich the filter body, and introduce the outside air sucked from the outside air introduction hole provided in the cover to the air conditioner through the cutout portion provided in the filter upper support plate to the air conditioner. In addition, the rainwater that has entered through the outside air introduction hole is dropped from the periphery of the filter cover to the periphery of the filter case, and is then discharged from a drain hole provided on the bottom surface of the periphery of the filter case. External air introduction filter mounting structure.