JP3804310B2 - Air intake duct structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an air intake duct structure having a water droplet separating function and capable of reliably discharging separated water to the outside air side.
[0002]
[Prior art]
As an air intake duct to be mounted on a vehicle, there are an extremely large number of well-known techniques, and examples shown in FIGS. 7 and 8 are given as examples. The air intake duct 1 a is arranged such that its upper surface is substantially flush with the height of the cab 3 and is hidden behind the cab 3. Further, as shown in FIG. 8, the upper cap part 28 and an air passage 29 connected to the lower part of the cap part 28 are provided, and an air inlet 2 a is formed downwardly below the cap part 28. A partition plate 30 is provided inside the air passage 29 to partition the air passage 29. A rubber connector 6 is attached to the lower end of the air passage 29 and is connected to the air cleaner 32 of the engine 33. The air cleaner 32 is provided with an air cleaner element 36 and an air valve 35 for draining water. The rubber connector 6 is fixed to the lower end of the air passage 29 by a clip 31 or the like.
[0003]
[Problems to be solved by the invention]
Since the upper end of the air intake duct 1 a is substantially flush with the upper surface of the cab 3, there is no problem with the mountability. However, as shown in FIG. 8, since the air 26 is introduced in a meandering manner from below, the intake resistance is increased, and relatively dirty air on the lower side of the cab 3 is easily introduced. In addition, there is a problem that hot air on the engine side is easily sucked. The air 26 including the water 27 introduced from the air inlet 2 a falls along the partition plate 30 and enters the air cleaner 32. The air cleaner 32 is provided with an air valve 35 from which water 27 is drained. However, when the amount of water intrusion increases during heavy rain or the like, there is a problem that the drainage from the air valve 35 is not in time, and the air 26 including the water 27 is sucked into the engine 33 and the output of the engine is reduced. Further, since the conventional one does not have a separation function, there is a problem that powdered snow adheres to the air cleaner element and lowers the filtration function. Further, in the conventional air intake duct 1 a, the water 27 overflowing from the ridge 34 of the cap 28 falls along the outer surface of the hood, and even if it is tightened by the clip 31, the engine 33 passes through the minute gap between the hood and the rubber connector 6. There was a problem of being sucked to the side. Further, there is a problem that the water 27 adhering to the outer surface of the hood is also sucked from the gap to the engine 33 side.
[0004]
The present invention solves the above problems, and water droplet separation is effectively performed, and the separated water is prevented from entering the engine side and discharged from the air intake duct to the outside air side. An object of the present invention is to provide an air intake duct structure in which water is not sucked to the engine side and water is always reliably discharged to the outside air side.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is characterized in that the invention of claim 1 extends in the vertical direction along the rear surface of the cab 3 of the vehicle, and its upper end is flush with the height of the cab 3. The end is flush with the side surface of the cab 3, the air introduction port 2 is formed above the front end on the front side and the front end on the side surface, and the opening for attaching the rubber connector 6 connected to the engine side is formed below. The air intake duct 1 having the duct body 7 is formed with one or more V-ribs 19 having a shape with an apex pointed upward and diverging downward in the duct body 7, At the lower end of the duct body 7 across the opening, there are provided water pool portions 9 and 10 for collecting water droplets that flow down the duct main body 7 along the V rib 19. Drain holes 17 and 18 communicating with the outside air side Characterized in that it is made. The invention according to claim 2 is characterized in that the drain holes 17 and 18 are composed of holes formed downward and holes formed horizontally.
[0006]
The air intake duct of the present invention is disposed on the rear surface of the cab and separates water and air introduced from air inlets provided on the upper front and side surfaces and introduces the separated air to the engine side. However, the separated water droplets flow down in the duct body, are collected in a water pool portion sandwiching an opening portion to which a rubber connector of the duct body is attached, and are discharged from the drain hole to the outside air side. Since the drain hole is away from the opening, there is no intrusion of drainage into the engine side, and there is no intrusion of water from the rubber connector mounting portion due to the suction force of the engine. Moreover, since the drain hole is formed downward, the discharge to the outside air is performed smoothly. Even if this drain hole is clogged with dust or the like, there is a lateral drain hole, so water is always discharged to the outside air side.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the air intake duct structure of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, a space 5 is formed between the cab 3 and the loading platform 4 in the vehicle. The air intake duct 1 of the present invention is interposed in the space 5, and as shown in FIG. 1, the side ends of the cab 3 are made to coincide with the full width of the cab 3, and the upper surface of the cab 3 is made to coincide with the upper end thereof. Arranged. Therefore, the air intake duct 1 does not interfere with the overhanging portion 4a even if the overhanging portion 4a is present at the upper front portion of the loading platform 4. Further, as shown in the figure, the rubber connector 6 attached to the lower end of the air intake duct 1 is connected to an air cleaner 32 (FIG. 9) of the engine 33. As shown in FIG. 1, since an arcuate surface 3a is formed on the upper side of both side ends of the cab 3, the air intake duct 1 is disposed exposed behind the arcuate surface 3a. Therefore, the exposed portion is directly exposed to air or the like. Note that an air inlet 2 of the air intake duct 1 is formed in the exposed portion.
[0008]
Next, the structure of the air intake duct 1 of the present invention will be described with reference to FIGS. As shown in the figure, the air intake duct 1 includes a resin-made duct body 7 that is integrally formed by blow molding and has a slightly complicated structure, a rubber connector 6 attached to the lower portion thereof, and the like. First, air inlets 2 'and 2 "are formed above the front end of the duct body 7 and above the front end of the side face. The air inlets 2' and 2" are of an integral structure. It consists of what is fixed to the duct main body 7 so that attachment or detachment is possible. As shown in FIG. 5, a filter 8 is detachably attached to the back side of the air inlet 2 '. The inside of the duct body 7 is configured to form a sealed space except for a lower opening to which the rubber connector 6 is attached. The
[0009]
As shown in FIGS. 3 and 6, an opening 16 is formed at the lower end of the duct body 7, and the rubber connector 6 is attached to the opening 16. Pools 9 and 10 are formed on both sides of the opening 16 at the lower end of the duct body 7. As shown in FIG. 6, the water reservoirs 9 and 10 are provided with attachment holes 13 for attaching the air intake duct 1 to the cap 3 and the like, and concentric bulges around the attachment holes 13. Portions 11 and 12 are formed. Of course, the inner surfaces of the bulging portions 11 and 12 communicate with the water pool portions 9 and 10. In addition, openings 14 and 15 communicating with the water reservoirs 9 and 10 are formed above the water reservoirs 9 and 10, respectively. The water reservoirs 9 and 10 are provided with a plurality of drain holes 17 and 18. The drain hole 17 is formed at the lowermost position, but the drain hole 18 is formed above the drain hole 18. This is so that water can be smoothly drained from the drain hole 18 even when mud or the like accumulates in the water pools 9 and 10 and the drain hole 17 is blocked.
[0010]
On the other hand, as shown in FIG. 3, an inverted V-shaped V-rib 19 and an adjusting rib 22 are formed on the rear surface of the duct body 7, and a lateral rib 20 and a longitudinal rib 21 are provided on the surface, and the duct body 7. Is defined by ribs 23, 24, and 25 to form a resonator. The V rib 19 has an apex that is pointed upward, and spreads downward from the apex in the left-right direction.
[0011]
Next, the operation of the air intake duct structure of the present invention will be described. Air 27 including water 26 introduced into the duct body 7 from the air inlet 2 is separated in the duct body 7. The separated water 26 adheres to the V rib 19 shown in FIG. 3 and flows down along the shape of the V rib 19 as shown in FIG. Since the left and right lower ends of the V-rib 19 are disposed substantially above the openings 14 and 15 of the water reservoirs 9 and 10, the water 27 that has flowed down along the V-rib 19 flows from the openings 14 and 15 into the water reservoir. 9 and 10 are introduced. Further, water 27 adhering to the ribs and inner walls of the duct body 7 other than the V ribs 19 also flows down along these, but is finally introduced into the water reservoirs 9 and 10. On the other hand, the separated air 26 is introduced from the opening 16 to the air cleaner 32 (FIG. 9) through the rubber connector 6.
[0012]
Since the bulging portions 11 and 12 are arranged in the water pool portions 9 and 10 so as to communicate with the water pool portions 9 and 10, the water 27 proceeds to the bulging portions 11 and 12. As shown in FIG. 7, the water draining holes 17, 18 communicate with the water pool locations including the bulging portions 11, 12, so that the water 27 introduced into the water pool locations is the water drain holes 17, 18. 18 is discharged to the outside air side. Thus, all the water 27 introduced into the duct body is discharged to the outside air side and does not enter the engine 33 side.
[0013]
Although both drain holes 17 and 18 are formed in the present embodiment, only the drain holes 17 may be provided, or more drain holes may be provided. However, in the case of only the drain hole 17, as described above, the water 27 cannot be discharged when the drain hole 17 is clogged with dust or dirt from the ground side. Accordingly, a plurality of drain holes are required, and it is particularly desirable to provide the lateral drain holes 18.
[0014]
As shown in FIG. 3 and FIG. 6, the water reservoirs 9 and 10 are arranged with the opening 16 of the duct body 7 interposed therebetween and are in a separated position. Moreover, the drain holes 17 and 18 are also in a position away from each other. Therefore, even if the suction force from the engine 33 acts on the opening 33, the water 27 discharged from the drain holes 17 and 18 is not sucked into the rubber connector 6. Therefore, intrusion of the water 27 into the engine 33 side is completely prevented.
[0015]
The water reservoirs 9 and 10 and the bulging portions 11 and 12 are integrally formed when the duct body 7 is blow-molded, and can be manufactured at low cost. Of course, these shapes are not limited to those shown in the drawings.
[0016]
【The invention's effect】
1) According to the air intake duct structure of the first aspect of the present invention, the water reservoir is formed on the left and right with the lower end opening of the duct main body interposed therebetween, and the water droplets in the duct main body finally form the water reservoir Therefore, all the water is discharged to the outside air through the drain hole formed in the water reservoir. Therefore, water can be completely prevented from entering the engine.
2) According to the air intake duct structure according to claim 2 of the present invention, the water drainage hole is composed of a plurality of water draining holes facing downward and laterally facing, and even if any water draining hole is clogged, the water draining is always performed. This is done and water is not stored in the duct body indefinitely.
[Brief description of the drawings]
FIG. 1 is a partial front view of a cab provided with an air intake duct of the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a rear view of the air intake duct of the present invention.
4 is a side view of FIG. 3;
FIG. 5 is a top view of FIG. 3;
FIG. 6 is a schematic view showing a water reservoir formed at the lower end of the duct body.
FIG. 7 is a schematic view showing a cab provided with a conventional air intake duct.
8 is a front view showing a detailed structure of the air intake duct in FIG. 7. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air intake duct 2 Air introduction port 2 'Air introduction port 2 "Air introduction port 3 Cab 3a Arc surface 4 Loading platform 4a Overhang | projection part 5 Space 6 Rubber connector 7 Duct body 8 Filter 9 Puddle part 10 Puddle part 11 Swell part 12 bulge 13 mounting hole 14 opening 15 opening 16 opening 17 drain hole 18 drain hole 19 V rib 20 horizontal rib 21 vertical rib 22 adjusting rib 23 rib 24 rib 25 rib 26 air 27 water

Claims (2)

It extends in the vertical direction along the rear surface of the cab 3 of the vehicle, its upper end is flush with the height of the cab 3, its side edge is flush with the side surface of the cab 3, and the front side and side sides upwardly to form an air inlet 2 in the front end, a air intake duct 1 having a duct body 7 to form an opening for mounting a rubber connector 6 for connecting the engine side downward, upward inside the duct body 7 One or more V-ribs 19 having a pointed apex and having a shape that spreads downward toward the bottom are formed, and the lower end of the duct body 7 sandwiching the opening is transmitted through the V-rib 19. Water reservoirs 9 and 10 for collecting water droplets flowing down in the duct body 7 are provided, and the water reservoirs 9 and 10 are formed with drain holes 17 and 18 communicating with the outside air side. Air intake duct structure. The air intake duct structure according to claim 1, wherein the drainage hole includes a hole formed downward and a hole formed horizontally.

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