JP5697941B2 - Air intake duct - Google Patents

Description

  The present invention relates to an intake duct.

  Generally, large transport vehicles such as trucks have more opportunities to travel on unpaved rough roads than ordinary passenger cars, so the engine intake air is not air near the ground, which contains a lot of dust. Therefore, it is preferable to take in a sufficiently high part of the clean air from the ground, and there is a risk of the rainwater and snow jumping together near the ground. It is preferable to incorporate.

  For this reason, in a large transport vehicle, as shown in an example in FIG. 7, the air intake duct 4 installed on the rear surface of the cab 3 is made flexible with respect to the air cleaner inlet duct 2 connected to stand upright with the air cleaner 1. It is connected via a boot 5 so that outside air can be taken in from an air intake 6 opened on the upper side of the intake duct 4.

  With regard to such an intake duct 4, the present inventors have examined the flow rate (flow rate) of the outside air sucked from the air intake 6, and no matter how much the air intake 6 is formed with a large opening area, the outside air is air. It has been found that the air is sucked from the lower side of the intake port 6 and is hardly sucked from the upper side of the air intake port 6. Thus, the outside air is sucked to the lower side of the air intake port 6. There is a concern that the flow rate increases due to the bias, and it becomes easy to suck rain, snow, and dust from the lower side of the air intake 6.

  Therefore, in order to make the flow velocity distribution of the outside air sucked from the air intake 6 uniform, it has been studied to divide the inside of the intake duct 4 into a plurality of flow paths and to increase the number of chambers. When the inside of the intake duct 4 is divided into a plurality of flow paths, as shown in a cross-sectional view in FIG. 8, a part of the intake duct 4 is sandwiched and crushed by a mold (not shown) at the time of blow molding. And the flow paths A and B are divided by the partition wall 7.

  In addition, as prior art document information related to a general intake duct, there is the following Patent Document 1.

JP 2002-317720 A

  However, in the conventional method of making the partition wall 7 by sandwiching and crushing a part of the intake duct 4 with a mold at the time of blow molding as described above, the flow passage cross-sectional area is reduced by crushing a part of the intake duct 4. There was a problem that it became small and caused an increase in intake resistance.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an intake duct that can be divided into a plurality of flow paths to increase the number of chambers without causing an increase in intake resistance. To do.

The present invention is an intake duct that is installed on the rear surface of a cab of a transport vehicle, extends in the vertical direction, and takes in outside air as an intake air for an engine from an air intake opening on the upper side thereof, and has the air intake on the upper side. A duct main body, and an internal partition component that defines a plurality of flow paths that are accommodated in the duct main body and reach the air intake, and the duct main body inserts the internal partition component from the outside. An insertion hole is opened at an appropriate position, and the inner partition part is provided with a cover plate on the back surface that closes the insertion hole when accommodated in the duct body, and rain or snow sucked together with outside air collides with the wall surface to cause water droplets. A saddle-shaped drip channel is provided at the lower end so that the collected material can be collected and poured into the side branch part at the lower part of the duct body .

  Thus, in this way, it is possible to partition and form the inside of the duct body into a plurality of flow paths simply by inserting the separately produced internal partition parts into the inside of the duct body from the insertion holes and accommodating them. Moreover, since it is possible to close the insertion hole with the covering plate of the internal partition component, compared with a method of creating a partition wall by sandwiching and crushing a part of the intake duct as in the prior art, It is possible to keep the flow path cross-sectional area large, thereby avoiding an increase in intake resistance.

  Furthermore, when implementing the intake duct of the present invention more specifically, it is possible to open the insertion hole by forming the duct body by blow molding and cutting off a part of the duct body after molding.

  According to the above-described intake duct of the present invention, since the inside can be partitioned into a plurality of flow paths while maintaining a large flow passage cross-sectional area in the duct body, a plurality of interiors can be formed without causing an increase in intake resistance. It is possible to achieve an excellent effect that it is possible to increase the number of chambers by dividing the flow path.

It is a perspective view which shows an example of the form which implements this invention. It is a perspective view of the internal partition components accommodated in the duct main body of FIG. It is sectional drawing of the III-III arrow of FIG. It is sectional drawing which shows the state before accommodating an internal partition component in a duct main body. It is sectional drawing which shows the state which accommodated the internal partition components in the duct main body. It is a perspective view which shows the state which coat | covered the front surface of the air intake port of FIG. 1 with the louver. It is the schematic which shows an example of a general intake duct. It is sectional drawing which shows the conventional structure which crushed a part of intake duct and divided | segmented the flow path.

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

  FIGS. 1-6 shows an example of the form which implements this invention, and the part which attached | subjected the code | symbol same as FIG. 7 represents the same thing.

  As shown in FIGS. 1 to 3, the intake duct 8 in this embodiment is formed by blow molding, and after the molding, the air intake ports 6a, 6b, 6c, 6d, 6e, and 6f are cut off and opened upward. A duct body 9 (see FIG. 1), and a plurality of flow paths A, B, C, D, which are accommodated in the duct body 9 and reach the air intake ports 6a, 6b, 6c, 6d, 6e, and 6f. It is comprised by the internal partition component 10 (refer FIG. 2) which divides and forms E and F (refer FIG. 3).

  That is, the internal partition component 10 includes a vertical partition wall 11 that divides the inside of the duct body 9 in the front-rear direction, and a side wall 12 that further divides the inside of the duct body 9 divided in the front-rear direction by the vertical partition wall 11 in the left-right direction. It is manufactured separately, and is accommodated in the duct body 9 so that six flow paths A, B, C, D, E, and F (see FIG. 3) can be defined in the duct body 9. It is.

  In addition, each of the flow paths A, B, C, D, E, and F can be individually communicated with the air intake ports 6a, 6b, 6c, 6d, 6e, and 6f. Guide parts 13, 14, 15, 16, and 17 are formed, and in the example shown here, the rear flow paths A, B, and C divided by the vertical partition wall 11 are the upper air intakes. The front flow paths D, E, and F divided by the vertical partition 11 communicate with the lower air intakes 6d, 6e, and 6f, and communicate with the inlets 6a, 6b, and 6c.

  Here, as shown in FIG. 4, when the internal partition component 10 is accommodated in the duct body 9, an insertion hole 18 for inserting the internal partition component 10 from the outside is formed on the back surface of the duct body 9 after molding. A cover plate 19 that is opened by excision and closes the insertion hole 18 when accommodated in the duct main body 9 is provided on the back surface of the internal partition component 10. As shown in FIG. In the state of being inserted into the duct main body 9 through the insertion hole 18, the insertion hole 18 is closed by the covering plate 19 of the internal partition component 10 and can be fixed by a tapping screw 20 or the like.

  In the figure, reference numerals 21 and 22 denote bowl-shaped drip channels provided at the lower ends of the vertical partition wall 11 and the cover plate 19 in the internal partition component 10, and rain and snow sucked together with the outside air collide with the wall surface to form water droplets. Things are collected by the drip channels 21 and 22 and can be poured into the side branch portion 23 (see FIG. 1).

  As shown in FIG. 6, the front surfaces of the air intake ports 6a, 6b, 6c, 6d, 6e and 6f (see FIG. 1) are covered with a louver 24 so as to avoid the inhalation of rain and snow as much as possible. It is preferable to keep it.

  Thus, if the intake duct 8 is configured as described above, a plurality of separately manufactured internal partition parts 10 are inserted into the duct body 9 through the insertion holes 18 and accommodated therein, and a plurality of the interiors of the duct body 9 are accommodated. It is possible to partition into the flow paths A, B, C, D, E, and F, and it is also possible to close the insertion hole 18 with the cover plate 19 of the internal partition component 10, so that the conventional intake air Compared with the method of creating a partition wall by crushing a part of the duct with a mold, it is possible to keep the flow path cross-sectional area large, thereby avoiding an increase in intake resistance. .

  Therefore, according to the above embodiment, the inside of the duct main body 9 can be partitioned into a plurality of flow paths A, B, C, D, E, and F while keeping the flow passage cross-sectional area large. The interior can be divided into a plurality of flow paths A, B, C, D, E, and F without causing an increase in resistance to achieve multiple chambers.

  Note that the intake duct of the present invention is not limited to the above-described embodiment, and a form other than that shown in the figure may be adopted as a division form in the duct body, and other departures from the gist of the present invention. Of course, various modifications can be made within the range not to be performed.

3 Cab 6a, 6b, 6c, 6d, 6e, 6f Air intake 8 Intake duct 9 Duct body 10 Internal partition part 18 Insertion hole 19 Cover plate A, B, C, D, E, F Flow path

Claims (2)

An intake duct that is installed on the rear surface of the cab of the transport vehicle and extends in the up-down direction and takes in outside air as an intake air for the engine from an air intake opening on the upper side thereof, and a duct body having the air intake on the upper side; An internal partition part that forms a plurality of flow paths that are accommodated inside the duct body and reach the air intake, and the duct body appropriately has an insertion hole for inserting the internal partition part from the outside. Opening at a position, the inner partition part has a cover plate on the back surface that closes the insertion hole when accommodated in the duct body, and rain and snow sucked together with outside air collide with the wall surface to form water droplets. An air intake duct having a bowl-shaped drip channel provided at a lower end so as to be collected and poured into a side branch portion at a lower portion of the duct body .   The intake duct according to claim 1, wherein the duct body is formed by blow molding, and an insertion hole is opened by cutting a part of the duct body after molding.

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