JPH08158962A - Channel unit structure of duct - Google Patents

Abstract

PURPOSE: To prevent suction of foreign matters such as rainwater, fallen leaves and so on, and to simplify the manufacture of parts and facilitate a fitting work for parts by decreasing the number of part items so as to reduce the cost. CONSTITUTION: A hood 7 is installed on the upper part of an upper intake duct having an opening part 6a for introducing air fed into an engine at the upper end in such a manner as to surround the upper part of the upper intake duct 6 and form an air flow passage 8 in a space up to the upper intake duct 6, and a channel unit 14 integrated with a drip channel 12 which is positioned on the outer periphery of the lower end of the hood 7 and extended in the circumferential direction and with a net provided in the cross direction of the air flow passage 8 is fitted to the upper intake duct 6 and the hood 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct channel unit structure in which a drip channel and a net are integrally molded.

[0002]

2. Description of the Related Art In general, large vehicles such as trucks have more opportunities to drive on unpaved rough roads than passenger vehicles, so the intake air of the engine is not the air near the ground containing much dust, It is advisable to take in clean air above ground level.

Therefore, in a large-sized vehicle, as shown in FIGS.
As shown in FIG. 1, a cab 4 is connected to a lower intake duct 2 connected upright to an air cleaner 1 via a flexible boot 3.
The upper intake duct 6 fixed to the rear panel 5 is connected, and the hood 7 having the lower end opening 7a is disposed above the upper intake duct 6, and the lower end opening 7a connects the opening 6a of the upper intake duct. An air flow passage 8 is formed between the upper intake duct 6 and the hood 7 so as to be surrounded.

Due to the above-mentioned structure, when the engine is inhaled, clean air is discharged into the lower end opening 7 of the hood 7.
It is taken in from a, passes through the air flow passage 8, is turned upside down inside the hood 7, and flows into the inside from the opening 6a of the upper intake duct 6, inside the lower intake duct 2 and the air cleaner 1.
And is supplied to the engine.

However, when the engine is inhaled in the rain, raindrops falling from the lower edge of the hood 7 are sucked into the hood 7 by riding on the inhaled air, or the upper intake duct 6 is exposed. If only the hood 7 is attached so as to surround the opening 6a, foreign matter such as fallen leaves may be sucked into the hood 7 by riding on the sucked air. Could be sucked in and the air resistance would increase, causing a malfunction of the engine or the like.

To solve such a problem, conventionally, as shown in FIG. 5, a drip channel 9 is integrally formed along the outer periphery of the lower end of the hood 7, and the surface of the hood 7 is flowed down to the lower end of the hood 7. The rainwater that has arrived is collected in the drip channel 9 to prevent rainwater from entering the hood 7, or as shown in FIGS. 6 and 7, it is connected so as to stand upright on the air cleaner 1 and is fixed to the rear panel 5 of the cab 4. In addition, the net 11 is provided near the entrance of the intake duct 10 to prevent foreign matter such as leaves from entering due to the air taken in.

[0007]

However, in recent years, there has been a demand to prevent both intrusion of rainwater and foreign matter such as leaf fall at the same time. In order to meet this demand, a drip channel is formed on the lower outer periphery. Hood 7 with 9
It is conceivable to arrange the net 11 in the air flow passage 8 of FIG. However, in recent years, the shape of the hood 7 has become complicated in order to satisfy various functional requirements, and when the shape becomes complicated, it is necessary to adopt blow molding for the molding of the hood 7. When adopted, it is necessary to form the drip channel 9 as a separate member from the hood 7 and attach it to the hood 7. Therefore, when the drip channel 9 and the net 11 are attached to the hood 7 having a complicated shape, the number of components is increased, which requires time and labor for the production of the components and increases the cost of the attachment work. was there.

In view of the above situation, the present invention prevents foreign matter such as rainwater and fallen leaves from being sucked in, reduces the number of parts, facilitates parts production, and facilitates parts installation work. In this way, it is intended to provide a channel unit structure of a duct that enables cost reduction.

[0009]

In the duct channel unit structure of the present invention, an upper end of an intake duct having an opening for introducing air to be sent to an engine is provided at an upper end of the intake duct to a required position below the upper end of the intake duct. A duct having a hood surrounding the lower end and having an opening at its lower end so that an air flow passage is formed between the drip channel and the air passage located at the outer periphery of the lower end of the hood and extending in the circumferential direction. It is provided with a channel unit integrally formed with a net provided in the transverse direction of the road.

[0010]

According to the present invention, since the drip channel located at the outer periphery of the lower end of the hood and extending in the circumferential direction and the net provided in the transverse direction of the air flow passage are integrally molded, the channel unit is provided along the hood. The rainwater flowing down is collected in the drip channel at the lower end of the hood to prevent the rainwater from entering the hood, and the foreign matter that tries to enter the hood by riding on the flow of the air taken in is prevented from entering by the net.

Further, since the drip channel and the net are integrally molded, the number of parts to be attached to the hood can be reduced, so that the parts can be manufactured easily and the installation work can be easily performed. Cost can be reduced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the channel unit structure of the duct of the present invention, and FIGS.
The same parts as those shown in FIG.

In this embodiment, as shown in FIGS. 1 and 2, an upper intake duct 6 having an opening 6a for introducing air to be fed to the engine is provided at the upper end and an opening is provided at the lower end. The hood 7 is surrounded from the upper end of the upper intake duct 6 to a required position below, and a part of the inner surface extends in a circumferential direction and a vertical direction on a part of the outer surface of the upper intake duct 6 over a required range. And an air flow passage 8 communicating with the inside of the upper intake duct 6 is formed in a portion between the hood 7 and the upper intake duct 6 that is not in contact with each other. The duct 6 and the hood 7 are located on the outer periphery of the lower end of the hood 7 and extend in the circumferential direction of the air flow passage 8 and the hood 7 so as to remove foreign matter such as fallen leaves entrained in the sucked air. The air inside It is attached to the channel unit 14 which is molded integrally with nets 13 provided substantially horizontally in the passage 8.

The drip channel 12 of the above channel unit 14 includes an inner peripheral wall 15 extending downward from the lower end position of the hood 7 when the hood 7 is attached to the upper intake duct 6, and the inner peripheral wall 15 of the inner peripheral wall 15. A bottom portion 16 protruding from the lower end or near the lower end toward the outside of the hood 7,
An outer peripheral wall 17 standing upright on an outer end of the bottom portion 16 and a rising portion 18 rising up from the inner peripheral wall 15 so as to come into contact with an inner peripheral surface of a lower portion of the hood 7 when attached to the hood 7, and in a circumferential direction. Has one end closed and the other end open, and is inclined downward from one end side toward the other end side in the circumferential direction.

From the circumferential one end of the drip channel 12 to the middle, the bottom 16 is substantially horizontal and the inner peripheral wall 15 is substantially upright, but from the circumferential middle of the drip channel 12 to the other end. , The bottom portion 16 is arranged in a downward slope toward the outside of the hood 7, and the outer peripheral wall 17 is formed in a shape that opens slightly outward from the lower side to the upper side. The angle θ formed by is an acute angle.

Further, a rainwater intrusion prevention plate 21 is provided by extending the lower end of the inner peripheral wall 15 of the portion where the drip channel 12 has an acute angle to a position lower than the lower end of the acute angle portion of the drip channel 12.

The net 13 of the channel unit 14 described above has a rising portion 1 which continuously rises from the inner peripheral wall 15.
At the upper end of 8, the upper intake duct 6 and the hood 7 are substantially horizontal.
And a plurality of rivet insertion holes 19 for riveting the channel unit 14 to the hood 7. A bracket 20 having rivet insertion holes 20a for attaching the channel unit 14 to the upper intake duct 6 and the hood 7 extends upward or downward at required locations (three locations in FIG. 1) of the net 13. It is provided to do.

When the channel unit 14 in which the drip channel 12 and the net 13 are integrally formed is attached to the upper intake duct 6 and the hood 7, the rising portion 18 of the channel unit 14 is attached to the lower end of the hood 7 and the drip channel 12. It is fitted into the hood 7 so that the upper end of the inner peripheral wall 15 of the above is abutted, and bolts are inserted into the rivet insertion holes 20a provided with the brackets 20 to fix the channel unit 14 to the upper intake duct 6 and the hood 7, and the rivet insertion A rivet is inserted through the hole 19 to fix the channel unit 14 to the upper intake duct 6 and the hood 7.

Next, the operation of this embodiment will be described.

During rainy weather, even if rainwater flows down along the hood 7 and reaches the lower end of the hood 7, the channel unit 14
Accumulated in the groove of the drip channel 12 and flows from one end side to the other end side of the inclined drip channel 12, and then the other end side opening 12a of the drip channel 12
Since it flows further down, rainwater is not entrained in the air sucked into the hood 7.

Rainwater is the outer peripheral wall 1 of the drip channel 12.
7 Even if it overflows beyond the upper end and flows down along the outer peripheral wall 17, the angle θ formed by the lower surface of the bottom portion 16 of the drip channel 12 and the outer surface of the outer peripheral wall 17 is an acute angle, so that the water is drained. Is reliably performed, and rainwater does not enter the hood 7.

Further, foreign matter such as fallen leaves which is trying to get into the hood 7 by riding on the momentum of the sucked air is passed through the air flow passage 8
A net 13 provided substantially horizontally across the entire cross direction
Prevents intrusion.

In the middle of the drip channel 12 from one end side in the circumferential direction, the bottom portion 16 protruding toward the outside of the hood 7 is made substantially horizontal. This is from the one end side to the other end side of the drip channel 12. This is because the rainwater always flows in the opposite direction, so that the water volume does not increase as compared with the other end side, there is no fear that the rainwater overflows beyond the upper end of the outer peripheral wall 17 of the drip channel 12, and there is no need to drain the water at this portion. .

Also, the drip channel 12 and the net 13
Since it is integrally molded (injection molding), the number of parts attached to the hood 7 can be reduced, so that the manufacturing work can be performed easily and in a short time and the cost can be reduced. Since it is not necessary to separately attach the channel 12 and the net 13, the attachment work can be easily performed.

In the embodiment of the present invention, the angle θ formed by the lower surface of the bottom 16 of the drip channel 12 and the outer surface of the outer peripheral wall 17 is defined as the angle θ.
Although the case where the angle from the middle part to the other end side is made an acute angle has been described, it may be made an acute angle over the entire length of the drip channel 12, and other various changes are made within the scope not departing from the gist of the present invention. Of course you can get it.

[0027]

As described above, according to the present invention, since the drip channel which is located on the outer periphery of the lower end of the hood and extends in the circumferential direction and the net which is provided in the transverse direction of the air flow passage are integrally formed, the hood is provided. The rainwater flowing down along the hood is collected in the drip channel at the bottom of the hood to prevent rainwater from entering the hood, and foreign substances that try to get into the hood due to the flow of the intake air are prevented from entering by the net. In addition, since the drip channel and the net are integrally molded, the number of parts to be attached to the hood can be reduced, so that the parts can be manufactured easily and the mounting work can be easily performed, and the cost can be reduced. It is possible to obtain various excellent effects such as reduction of

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a channel unit structure of a duct according to the present invention.

FIG. 2 is an enlarged arrow view taken along line II-II in FIG.

FIG. 3 is a perspective view showing an example of a vehicle including a duct.

FIG. 4 is an enlarged arrow view in the IV-IV direction of FIG.

FIG. 5 is a side view showing an example of a conventional hood integrally formed with a drip channel.

FIG. 6 is a side view showing an example of a conventional air intake duct including a net.

FIG. 7 is an enlarged arrow view in the VII-VII direction of FIG.

[Explanation of symbols]

 6 Upper intake duct (intake duct) 6a Opening 7 Hood 7a Opening 8 Air flow passage 12 Drip channel 13 Net 14 Channel unit

Claims (1)

[Claims] 1. An upper part of an intake duct having an opening for introducing air to be sent to an engine at an upper end, which surrounds an upper part of the intake duct to a required lower position and has an air flow passage between the intake duct and the intake duct. In a duct having a hood having an opening at its lower end to be formed, a drip channel extending in the circumferential direction at the outer periphery of the lower end of the hood and a net provided in the transverse direction of the air flow passage are integrally molded. A duct channel unit structure characterized by comprising a channel unit.