JP2020094535A - Air intake duct - Google Patents

Abstract

To reduce water dripping from an air intake duct to a door of a cab.SOLUTION: An air intake duct 10 includes: an intake part 1 which is disposed above a door 25 provided on a side surface 24 of a cab 21 of a vehicle and takes air thereinto; a lower surface part 4 which is provided at the inner side of the intake part 1 when viewed in a vehicle width direction, faces downward, and faces a roof part 22 of the cab 21; and a first guide part 7 which is provided at the lower surface part 4, extends in a vehicle length direction, and guides water flowing along the lower surface part 4 to the outer side as seen in the vehicle width direction to the roof part 22.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to an intake duct attached to a cab of a vehicle.

The vehicle is provided with an intake duct for sending air to the engine. Conventionally, an intake duct attached to a cab of a vehicle such as a truck is known. For example, Patent Literature 1 discloses an intake duct arranged along the rear surface of the cab.

JP 2012-180800 JP

By the way, the intake duct may be installed in the roof part of the cab in order to take in cooler air (so-called roof-on-snorkel). In this case, since the intake duct is arranged farther from the engine, it is possible to take in air that is less affected by the exhaust heat of the engine. As a result, there is an advantage that fuel efficiency can be improved.

On the other hand, since the intake duct installed in the roof portion is located above the door provided on the side surface of the cab, for example, in rainy weather, the water flowing through the intake duct tends to drip toward the door. For this reason, when the driver opens the door and puts his head out to confirm the rearward direction, or puts his head out through the window opening formed in the door when the vehicle moves backwards, water dripping from the intake duct will There is a problem that it is easier for the driver.

The air intake duct of the present disclosure was created in view of the above-described problems, and one of its purposes is to reduce water dripping toward the door of the cab.

The present invention has been made to solve at least a part of the problems described above, and can be realized as the following aspects or application examples.
(1) The intake duct according to this application example is disposed above a door provided on a side surface of a cab of a vehicle, and is provided in an intake portion that takes in air, and inside the intake portion in the vehicle width direction. A lower surface portion that faces downward and faces the roof portion of the cab; and water that is provided on the lower surface portion and extends in the vehicle length direction and that flows through the lower surface portion to the outside in the vehicle width direction to the roof portion. And a first guide portion for guiding. As a result, the water flowing along the vehicle width direction outside along the lower surface portion is less likely to flow to the outside in the vehicle width direction than the first guide portion, so that the water dripping toward the door is reduced.

(2) In the intake duct according to this application example, the first guide portion may be formed in a rib shape that protrudes downward from the lower surface portion. If the first guide portion is rib-shaped in this way, it is easy for the first guide portion to receive water flowing along the lower surface portion to the outside in the vehicle width direction.

(3) In the intake duct according to this application example, the first guide portion may be provided in the roof portion side by side with a recess extending in the vehicle length direction in the vertical direction. When the positional relationship between the first guide portion and the concave portion of the roof portion is defined in this way, water flowing along the lower surface portion to the outside in the vehicle width direction falls from the first guide portion to the concave portion, and along the concave portion. It becomes easier to flow in the vehicle length direction. For this reason, the water guided to the roof portion does not easily flow to the door.

(4) In the air intake duct according to this application example, the air intake duct is provided on the inner side in the vehicle width direction of the intake portion, and the upper surface portion facing upward and the front end portions of the upper surface portion and the lower surface portion. And a front guide portion provided on the upper surface portion and extending in the vehicle length direction, and a front guide portion provided on the front surface portion and extending in the vertical direction and connected to the upper guide portion. A second guide portion that guides water flowing along the upper surface portion to the outside in the vehicle width direction to the roof portion. If the second guide portion is provided in this way, it becomes difficult for water that flows along the upper surface portion to the outer side in the vehicle width direction to flow to the outer side in the vehicle width direction than the second guide portion. Therefore, the water dripping toward the door is further reduced.

(5) In the intake duct according to this application example, the intake duct includes a reinforcing rib that is formed on the upper surface portion and reinforces the upper surface portion, and the upper guide portion has a vehicle width direction that is greater than that of the reinforcing rib. It may be formed in a rib shape that protrudes upward from the upper surface portion on the outside of, and may have a protrusion height larger than that of the reinforcing rib. If the reinforcing ribs are provided in this way, the upper surface portion is reinforced. Further, if the protruding height of the upper guide portion is made larger than the protruding height of the reinforcing rib, the upper guide portion can easily receive the water flowing along the reinforcing rib to the outside in the vehicle width direction.

(6) In the intake duct according to this application example, the upper surface portion is inclined downward toward the front, and the lower end portion of the front guide portion is located inside the front end portion of the first guide portion in the vehicle width direction. It may be arranged. Inclining the upper surface portion in this manner reduces air resistance when the vehicle is traveling. Further, if the lower end portion of the front guide portion is arranged inside the front end portion of the first guide portion in the vehicle width direction, the water flowing forward along the inclined upper surface portion is the lower end portion of the front guide portion. Even if the water flows from the bottom to the lower surface, the first guide portion guides the water to the roof portion, so that the water dripping toward the door is more reliably reduced.

(7) In the intake duct according to this application example, a lower end portion of the front guide portion may be provided in the roof portion in a vertical direction with a recess extending in the vehicle length direction. If the positional relationship between the lower end portion of the front guide portion and the concave portion of the roof portion is defined in this way, water flowing along the upper surface portion to the outside in the vehicle width direction falls from the second guide portion to the concave portion, and It becomes easy to flow in the vehicle length direction along. For this reason, the water guided to the roof portion does not easily flow to the door.

According to the air intake duct of the present disclosure, it is possible to reduce water that drips toward the door of the cab.

1 is a perspective view showing a front portion of a vehicle equipped with an intake duct as an embodiment. It is a perspective view which shows the principal part of the intake duct of FIG. It is a front part which shows the principal part of the intake duct of FIG. It is a figure for demonstrating the effect|action by the air intake duct of FIG. 1 (The figure which added the broken line arrow which shows the path of a water flow to FIG. 3).

An intake duct as an embodiment will be described with reference to the drawings. The embodiments described below are merely examples, and are not intended to exclude various modifications and application of techniques that are not explicitly described in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the spirit thereof. Also, they can be selected or combined as needed.

[1. Device configuration]
The intake duct 10 of the present embodiment is provided in the vehicle 20 shown in FIG. Here, the vehicle 20 which is a truck is illustrated. Hereinafter, the forward direction of the vehicle 20 will be referred to as the front, and the opposite direction (the backward direction of the vehicle 20) will be referred to as the rear, and the left and right will be determined based on the state of facing the front of the vehicle 20. Further, the front-back direction is also referred to as the vehicle length direction, and the left-right direction is also referred to as the vehicle width direction. Further, a direction orthogonal to both the vehicle length direction and the vehicle width direction is referred to as a vertical direction. It is assumed that the vehicle 20 is on a horizontal road surface and has a posture in which the vertical direction corresponds to the vertical direction (the downward direction corresponds to the gravity action direction).

A substantially box-shaped cab 21 is provided at the front of the vehicle 20, and an engine (not shown) is mounted below the cab 21. In this embodiment, the vehicle 20 is a right-hand drive vehicle, and a driver's seat (not shown) is provided on the right side inside the cab 21.

The roof portion 22 that constitutes the upper surface of the cab 21 is formed of a panel that extends in the vehicle length direction and the vehicle width direction. The roof portion 22 of the present embodiment is provided with a plurality of recesses (roof beads) 23 (only one of which is given a symbol in FIG. 1) extending in the vehicle length direction. Each of the recesses 23 is a groove-like portion that is recessed downward, and is provided over substantially the entire length of the roof portion 22 in the vehicle length direction. The plurality of recesses 23 are arranged side by side in the vehicle width direction at intervals. A vertical cross section of the roof portion 22 along the vehicle width direction is corrugated due to the plurality of recesses 23.

Doors 25 are provided on the left and right side surfaces 24 of the cab 21. In FIG. 1, the door 25 provided on the right side surface 24 is shown, and the door 25 provided on the left side surface 24 is omitted. For example, when the vehicle 20 is moved backward, the driver sitting in the driver's seat opens the door 25 provided on the right side surface 24 and puts his or her head out, or puts his head out through a window opening 27 formed in the door 25. Or you can check the back.

The intake duct 10 is a device for sending air to an engine mounted on the vehicle 20. The intake duct 10 of the present embodiment includes a head portion 11 installed on the roof portion 22 of the cab 21 and a duct portion 12 arranged along the rear surface 26 of the cab 21. The head portion 11 is a portion for taking in air (outside air) outside the vehicle 20, and is formed in a substantially box shape. The duct portion 12 is a portion that serves as an air passage between the head portion 11 and the engine, and is formed in a tubular shape extending downward from the rear end portion of the head portion 11. The inside of the head portion 11 and the inside of the duct portion 12 communicate with each other. The air taken in by the head portion 11 is sent to the intake portion of the engine through the duct portion 12.

In this embodiment, the intake duct 10 arranged on the right side of the cab 21 is illustrated. More specifically, the head portion 11 is installed on the right rear portion of the roof portion 22 of the cab 21, and the duct portion 12 is arranged along the right end portion of the rear surface 26 of the cab 21. When the intake duct 10 arranged on the right side of the cab 21 is used as a reference, the outer side in the vehicle width direction is the right side and the inner side in the vehicle width direction is the left side. Therefore, in the following description, the outer side in the vehicle width direction is also referred to as “right side”, and the inner side in the vehicle width direction is also referred to as “left side”. Further, the roof portion 22 of the cab 21 is also referred to as a "cab roof portion 22".

As shown in FIG. 2, the head portion 11 is arranged so as to face rightward and takes in air (outside air), a side surface portion 2 facing leftward, an upper surface portion 3 facing upward, It has a lower surface portion 4 facing downward and a front surface portion 5 facing forward. All of these parts 1 to 5 form the outer surface of the head part 11. Note that the orientation of each of the portions 1 to 5 here is a rough orientation, and the orientation of each of the portions 1 to 5 does not necessarily have to be directly opposite to the orientation.

The intake portion 1 is formed with an intake port 1a for taking in air. Here, the case where the louver 1b having a large number of blades is arranged at the intake 1a is illustrated. As shown in FIG. 3, the intake unit 1 is arranged above the door 25 on the right side of the cab 21. The intake part 1 of the present embodiment is positioned with respect to the cab 21 such that the entire intake part 1 is located to the right of the cab roof part 22 and its lower end is located slightly below the cab roof part 22. ing. Hereinafter, the door 25 on the right side is simply referred to as "door 25".

The side surface portion 2 is located on the left side of the intake portion 1 and apart from the attachment portion 1. The side surface portion 2 of the present embodiment is formed in a substantially flat shape that extends in the up-down direction and inclines rightward (to approach the mounting portion 1) toward the front. Further, the side surface portion 2 is formed to be shorter than the intake portion 1 in the vertical direction. The side surface portion 2 is provided above the cab roof portion 22 and apart from the cab roof portion 22.

The upper surface portion 3 is provided on the left side of the intake portion 1 and connects the upper end portions of the intake portion 1 and the side surface portion 2 to each other. The upper surface portion 3 of the present embodiment is formed in a curved surface shape that extends along the vehicle width direction and that gently inclines downward toward the front. Reinforcing ribs 6 that reinforce the upper surface portion 3 are formed on the upper surface portion 3. The reinforcing rib 6 has a shape projecting upward from the upper surface portion 3 and extends along the upper surface portion 3. In this embodiment, the reinforcing ribs 6 provided in a mesh shape (lattice shape) are exemplified.

More specifically, the reinforcing rib 6 is composed of a plurality of vertical portions 6a extending in the vehicle length direction and a plurality of horizontal portions 6b extending in the vehicle width direction and intersecting the vertical portions 6a. In FIGS. 2 and 3, only one of the plurality of vertical portions 6a and the plurality of horizontal portions 6b is denoted by a reference numeral. More specifically, the vertical portion 6a of the present embodiment extends obliquely to the right from the rear toward the front. As shown in FIG. 2, the reinforcing rib 6 of the present embodiment extends rearward of the upper surface portion 3 and is formed over the upper surface portion 3 and the upper end portion of the duct portion 12.

The lower surface portion 4 is provided on the left side of the intake portion 1 and connects the lower end portions of the intake portion 1 and the side surface portion 2 to each other. As shown in FIG. 3, the lower surface portion 4 of the present embodiment is roughly formed in a curved surface shape that is inclined downward to the right. More specifically, the lower surface portion 4 gently inclines downward from the lower end portion of the side surface portion 2 to the right, and then gradually moves along the corner between the roof portion 22 of the cab 21 and the right side surface 24. The slope (curvature) is increased and the slope is descending. Further, the right end portion (the outer end portion in the vehicle width direction) of the lower surface portion 4 extends in the vehicle width direction and is connected to the lower end portion of the mounting portion 1. The entire lower surface portion 4 is provided with a gap between it and the cab 21. Further, the lower surface portion 4 faces the cab roof portion 22 above the cab roof portion 22.

The front surface portion 5 connects the front end portions of the upper surface portion 3 and the lower surface portion 4 to each other, and also connects the front end portions of the intake portion 1 and the side surface portion 2 to each other. As shown in FIG. 2, the front surface portion 5 of the present embodiment extends substantially downward and slightly forward from the front end portion of the upper surface portion 3 (decreases forward with a steeper slope than the upper surface portion 3). Is formed in. The boundary portions of the side surface portion 2, the upper surface portion 3, the lower surface portion 4 and the front surface portion 5 are formed in a curved shape.

The intake duct 10 includes a first guide part 7 and a second guide part 8 as a structure for guiding water flowing along the outer surface of the intake duct 10 to the cab roof part 22 in case of rain. The first guide portion 7 guides the water flowing rightward along the lower surface portion 4 to the cab roof portion 22, and the second guide portion 8 guides the water flowing rightward along the upper surface portion 3. It leads to the roof portion 22.

The first guide portion 7 is provided on the lower surface portion 4 and extends in the vehicle length direction. The present embodiment exemplifies the first guide portion 7 extended to a portion of the lower surface portion 4 above the cab roof portion 22 where the slope starts to become steep. The first guide portion 7 is provided so as to entirely overlap the cab roof portion 22 in a top view. More specifically, as shown in FIG. 3, the first guide portion 7 is provided side by side with the concave portion 23 formed in the cab roof portion 22 in the vertical direction. Therefore, when the downward direction of the vehicle 20 matches the acting direction of gravity, the first guide portion 7 is positioned directly above the recess 23 (vertically above).

The first guide portion 7 of the present embodiment is formed in a rib shape protruding downward from the lower surface portion 4. The protruding height H1 of the first guide portion 7 is set to be larger than the protruding height Hr of the reinforcing rib 6 (Hr<H1), for example. In addition, the protrusion height here corresponds to the shortest distance from the base end to the tip. For example, the protrusion height H1 of the first guide portion 7 corresponds to the shortest distance from the base end (upper end) that is the boundary portion with the lower surface portion 4 to the tip (lower end) that is the protruding end.

The second guide portion 8 has an upper guide portion 8 a provided on the upper surface portion 3 and a front guide portion 8 b provided on the front surface portion 5. The upper guide portion 8a and the front guide portion 8b are connected to each other and are provided in one line. Thus, the second guide portion 8 is provided over the upper surface portion 3 and the front surface portion 5 by the upper guide portion 8a and the front guide portion 8b.

The upper guide portion 8a extends in the vehicle length direction. In this embodiment, the upper guide portion 8a extending to the right of the reinforcing rib 6 is illustrated. More specifically, the upper guide portion 8a extends so as to pass through the right end portion (the outer end portion in the vehicle width direction) of the lateral portion 6b of the reinforcing rib 6. The upper guide portion 8a is preferably provided at the right end portion (boundary portion with the intake portion 1) of the upper surface portion 3 or in the vicinity thereof.

The upper guide portion 8a of the present embodiment is formed in a rib shape protruding upward from the upper surface portion 3. The protruding height H2 of the upper guide portion 8a is made larger than the protruding height Hr of the reinforcing rib 6 (Hr<H2). In this embodiment, the protrusion height H1 of the first guide portion 7 and the protrusion height H2 of the upper guide portion 8a are set to be equal (H1=H2).

The front guide portion 8b extends in the vertical direction. More specifically, the front guide portion 8b of the present embodiment extends in a straight line (diagonal line) shape that extends downward and slightly leftward from the front end portion of the upper guide portion 8a. The lower end portion 8c of the front guide portion 8b is arranged to the left of the front end portion 7a of the first guide portion 7. Further, the lower end portion 8c of the front guide portion 8b is provided side by side with the concave portion 23 of the cab roof portion 22 in the vertical direction. Therefore, when the downward direction of the vehicle 20 coincides with the action direction of gravity, the lower end portion 8c of the front guide portion 8b is located directly above the recess 23 (vertically above).

The front guide portion 8b of the present embodiment is formed in the same rib shape as the upper guide portion 8a. Specifically, the front guide portion 8b has a shape protruding forward from the front surface portion 5. The protrusion height H3 of the front guide portion 8b is set equal to the protrusion height H2 of the upper guide portion 8a (H2=H3). Therefore, the first guide portion 7 and the second guide portion 8 of the present embodiment have the same protrusion heights H1, H2, and H3 in any part.

[2. Action]
The operation of the intake duct 10 of the present embodiment will be described with reference to FIG. In FIG. 4, the paths of water flowing along the outer surface of the intake duct 10 are indicated by thick dashed arrows A1 to A5, for example, in case of rain. Further, as a comparative example, water paths in the case where the first guide portion 7 and the second guide portion 8 are not provided are indicated by thin broken arrows B1 and B2.

First, the operation of the first guide portion 7 will be described in detail. In the intake duct 10, water flowing leftward along the upper surface portion 3 and the lateral portion 6b of the reinforcing rib 6 flows downward through the side surface portion 2 and then flows rightward through the lower surface portion 4. (See arrow A1). Here, in the structure in which the first guide portion 7 is not provided, water flowing to the right along the lower surface portion 4 reaches the right end portion of the lower surface portion 4 (a boundary portion with the lower end portion of the intake portion 1). It flows and falls downward from the right end of the lower surface portion 4 by the action of gravity (see arrow B1). Therefore, in the structure in which the first guide portion 7 is not provided, water is likely to drip from the lower surface portion 4 toward the door 25.

On the other hand, in the intake duct 10 provided with the first guide portion 7, the water flowing to the right along the lower surface portion 4 is received by the first guide portion 7 when reaching the position of the first guide portion 7. This makes it difficult for the water flowing through the lower surface portion 4 to reach the right end portion of the lower surface portion 4, so that the amount of water dripping from the right end portion of the lower surface portion 4 toward the door 25 is reduced.

Further, the water received by the first guide portion 7 falls from the first guide portion 7 to the cab roof portion 22 by the action of gravity (see arrow A2). In the present embodiment, since the first guide portion 7 is located right above the concave portion 23 of the cab roof portion 22, water that falls from the first guide portion 7 by the action of gravity enters the concave portion 23 and follows the concave portion 23. It flows in the vehicle length direction.

As described above, in the intake duct 10, the water flowing to the right along the lower surface portion 4 is guided to the cab roof portion 22 by the first guide portion 7. Then, the water guided to the cab roof portion 22 flows along the outer surface of the cab 21, so that it is avoided that the water drops from above the door 25 toward the door 25.

Next, the operation of the second guide portion 8 will be described in detail. In the intake duct 10, water may flow rightward along the upper surface 3 and the lateral portions 6b of the reinforcing ribs 6 (see arrow A3). Here, in the structure in which the second guide portion 8 is not provided, the water flowing to the right along the upper surface portion 3 and the lateral portion 6b of the reinforcing rib 6 flows from the right end portion of the upper surface portion 3 to the intake portion 1. And flows downward from the intake section 1 by the action of gravity (see arrow B2). For this reason, in the structure in which the second guide portion 8 is not provided, water is likely to drip from the intake portion 1 toward the door 25 of the cab 21.

On the other hand, in the intake duct 10 provided with the second guide portion 8, the water flowing rightward along the upper surface portion 3 is received by the upper guide portion 8a when reaching the position of the upper guide portion 8a. This makes it difficult for the water flowing through the upper surface portion 3 to reach the intake portion 1, so that the amount of water dripping from the intake portion 1 toward the door 25 is reduced.

Further, the water received by the upper guide portion 8a flows forward along the upper guide portion 8a along the upper surface portion 3 and then along the front guide portion 8b along the front surface portion 5 downward. (See arrow A4). Then, this water falls from the lower end portion 8c of the front guide portion 8b to the cab roof portion 22 by the action of gravity (see arrow A5). In the present embodiment, since the lower end portion 8c of the front guide portion 8b is located right above the concave portion 23 of the cab roof portion 22, water that falls from the second guide portion 8 by the action of gravity enters the concave portion 23, and the concave portion 23 Along the direction of the vehicle length.

Thus, in the intake duct 10, the water that has flowed to the right along the upper surface portion 3 is guided to the cab roof portion 22 by the second guide portion 8. Further, in the present embodiment, since the lower end portion 8c of the front guide portion 8b is arranged on the left side of the front end portion 7a of the first guide portion 7, the water that has reached the lower end portion 8c of the front guide portion 8 is Even if the water flows to the portion 4, the water is guided to the cab roof portion 22 by the first guide portion 7 as described above.

It should be noted that the water falling from the first guide portion 7 and the second guide portion 8 flows along the outer surface of the cab 21 as described above if it is guided by the cab roof 22 even if it does not enter the recess 23. Therefore, it is possible to avoid dropping from above the door 25 toward the door 25.

[3. effect]
(1) According to the intake duct 10, the lower surface portion 4 is provided with the first guide portion 7 that extends in the vehicle length direction and guides the water flowing rightward along the lower surface portion 4 to the cab roof portion 22. It is possible to reduce water dripping from No. 4 toward the door 25. Therefore, for example, even if the driver opens the door 25 to expose the head when the vehicle 20 moves backward, or the driver opens the head through the window opening 27 of the door 25, it is possible to prevent the driver from being splashed with water.

(2) Since the first guide portion 7 is formed in a rib shape that projects downward from the lower surface portion 4, the first guide portion 7 can function as a wall that blocks water in the lower surface portion 4. This makes it easier for the water flowing along the lower surface portion 4 to be received by the first guide portion 7, so that the amount of water dripping from the lower surface portion 4 toward the door 25 can be more easily reduced.

(3) Since the first guide portion 7 is provided side by side in the up-down direction with the recess 23 extending in the vehicle length direction in the cab roof portion 22, water that falls from the first guide portion 7 under the action of gravity is recessed 23. You can make it easier to enter. As a result, the water guided to the cab roof part 22 by the first guide portion 7 easily flows in the vehicle length direction along the recessed portion 23, so that the water cannot easily flow from the cab roof part 22 to the door 25 side. it can. Therefore, the water dripping toward the door 25 can be reduced more reliably.

(4) Since the second guide portion 8 that guides the water flowing rightward along the upper surface portion 3 to the cab roof portion 22 is provided, the amount of water dripping from the upper surface portion 3 toward the door 25 can be reduced. More specifically, since water flowing rightward along the upper surface portion 3 flows along the upper guide portion 8a and then along the front guide portion 8b, it is difficult for water to flow from the upper surface portion 3 to the intake portion 1. can do. Therefore, the amount of water dripping toward the door 25 can be further reduced.

(5) Since the upper guide portion 8a is formed in a rib shape that protrudes upward from the upper surface portion 3, the upper guide portion 8a can function as a wall that blocks water in the upper surface portion 3. This makes it easier for the water flowing along the upper surface portion 3 to be received by the upper guide portion 8a, so that the water dripping from the upper surface portion 3 toward the door 25 can be more easily reduced.

Further, since the upper guide portion 8a is provided on the right side of the reinforcing rib 6 and the projecting height H2 thereof is made larger than the projecting height Hr of the reinforcing rib 6, the water flowing along the reinforcing rib 6 is raised. It can be easily received by the guide portion 8a. Thereby, the amount of water dripping toward the door 25 can be reduced more reliably.

Since the reinforcing ribs 6 are mesh-shaped in the present embodiment, water may collect in the space defined by the upper surface portion 3 and the reinforcing ribs 6, and this water may flow to the right all at once. In this respect, if the upper guide portion 8a having the above-described protruding height H2 is provided, the upper guide portion 8a can more reliably receive water. Therefore, the water dripping toward the door 25 can be reduced more reliably.

(6) Since the upper surface portion 3 is inclined downward toward the front, air resistance acting on the upper surface portion 3 when the vehicle 20 is traveling can be reduced. In addition, since water flows forward due to the action of gravity on the upper surface portion 3 that is inclined forward as described above, it is possible to easily guide the water flowing along the second guide portion 8 to the lower end portion 8c of the front guide portion 8b. .. Then, even if the water guided to the lower end portion 8c of the front guide portion 8b flows to the lower surface portion 4, the lower end portion 8c of the front guide portion 8b is arranged to the left of the front end portion 7a of the first guide portion 7. Therefore, the water can be guided to the cab roof part 22 by the first guide part 7 as described above. Therefore, the amount of water dripping toward the door 25 can be further reduced.

(7) Since the lower end portion 8c of the front guide portion 8b is provided side by side in the up-down direction with the recess 23 extending in the vehicle length direction in the cab roof portion 22, water falling from the front guide portion 8b by the action of gravity is prevented. The recess 23 can be easily inserted. As a result, the water guided to the cab roof portion 22 by the second guide portion 8 easily flows in the vehicle length direction along the recess 23, so that the water is less likely to flow from the cab roof portion 22 to the door 25 side. it can. Therefore, the water dripping toward the door 25 can be reduced more reliably.

(8) The intake portion 1 is arranged to the right of the cab roof portion 22 and its lower end portion is located below the cab roof portion 22, and the lower surface portion 4 is provided on the right side surface 24 of the cab 21 and the roof. Since the air intake duct 10 is formed in a curved shape along the corner with the part 22, the air intake performance of the intake part 1 is ensured while making the intake duct 10 correspond to the shape of a general (existing) cab 21. You can As a result, the intake duct 10 can be applied to the existing cab 21, which can contribute to cost reduction. In addition, when the lower surface portion 4 is formed in the above-described curved surface shape and the intake portion 1 is arranged as described above, the water transmitted through the lower surface portion 4 and the intake portion 1 is likely to drip toward the door 25, According to the intake duct 10, this can be suppressed by the first guide portion 7 and the second guide portion 8 as described above.

[4. Modification]
The first guide portion 7 is not limited to the rib shape described above, but may be formed in a groove shape that is recessed upward from the lower surface portion 4, for example. Similarly, the second guide portion 8 is not limited to the rib shape described above, and may be formed in a groove shape that is recessed downward from the upper surface portion 3. Further, the first guide portion 7 and the lower end portion 8c of the front guide portion 8b may be disposed so as to be displaced in the vehicle width direction with respect to the recess 23 of the cab roof portion 22. Even in this case, as described above, the water is guided to the cab roof part 22 by the first guide part 7 and the second guide part, so that the water dripping toward the door 25 can be reduced.

The extending direction of the front guide portion 8b described above is an example. However, as described above, if the front guide portion 8b is extended obliquely downward and slightly leftward from the front end portion of the upper guide portion 8a, the upper guide portion 8a can be arranged close to the right end portion of the upper surface portion 3 while being arranged. It becomes easier to arrange the lower end portion 8c of the front guide portion 8b to the left of the front end portion 7a of the first guide portion 7. Therefore, as described above, the amount of water dripping toward the door 25 can be reduced more easily.

The second guide portion 8 is not an essential component of the intake duct 10. According to the intake duct 10, even when the second guide portion 8 is not provided, the water flowing to the right along the lower surface portion 4 is guided to the cab roof portion 22 by the first guide portion 7, so that the lower surface is formed. Water dripping from the portion 4 toward the door 25 can be reduced.

The configuration of the reinforcing rib 6 described above is an example. Further, the above-mentioned protrusion heights H1, H2, H3, Hr are also examples. The reinforcing rib 6 may be omitted from the intake duct 10. Further, the shapes of the side surface portion 2, the upper surface portion 3, the lower surface portion 4 and the front surface portion 5 are not limited to those described above. For example, the upper surface portion 3 and the front surface portion 5 may not be inclined downward toward the front, and the lower surface portion 4 may be flat.

Although the intake duct 10 arranged on the right side of the cab 21 is illustrated in the above-described embodiment, the intake duct 10 may be arranged on the left side of the cab 21. In this case, the intake duct 10 may have a structure symmetrical with the above-described embodiment. With reference to the intake duct 10 arranged on the left side of the cab 21, the outer side in the vehicle width direction is the left side and the inner side in the vehicle width direction is the right side. Therefore, according to the intake duct 10 arranged on the left side of the cab 21, it is possible to reduce water dripping toward the door 25 provided on the left side surface 24 of the cab 21.

1 Intake Part 3 Upper Part 4 Lower Part 5 Front Part 6 Reinforcing Rib 7 First Guide Part 7a Front End 8 Second Guide Part 8a Upper Guide 8b Front Guide 8c Lower End of Front Guide 10 Intake Duct 20 Vehicle 21 Cab 22 Cab roof (roof part)
23 recess 24 side 25 door

Claims (7)

An intake section that is arranged above the door provided on the side surface of the cab of the vehicle and takes in air,
A lower surface portion that is provided on the inner side in the vehicle width direction than the intake portion, faces downward, and faces the roof portion of the cab,
A first guide portion provided on the lower surface portion, extending in the vehicle length direction, and guiding water flowing outward in the vehicle width direction along the lower surface portion to the roof portion; duct. The intake duct according to claim 1, wherein the first guide portion is formed in a rib shape that protrudes downward from the lower surface portion. The air intake duct according to claim 1 or 2, wherein the first guide portion is provided in the roof portion so as to be vertically aligned with a recess extending in the vehicle length direction. An upper surface portion that is provided on the inner side in the vehicle width direction than the intake portion and that faces upward,
A front surface portion connecting the front end portions of the upper surface portion and the lower surface portion,
The upper guide portion is provided on the upper surface portion and extends in the vehicle length direction, and the front guide portion is provided on the front surface portion and extends in the vertical direction and is connected to the upper guide portion. And a second guide portion that guides the water flowing outward in the vehicle width direction to the roof portion, the intake duct according to claim 1. A reinforcing rib formed on the upper surface to reinforce the upper surface,
The upper guide portion is formed in a rib shape protruding upward from the upper surface portion outside the reinforcing rib in the vehicle width direction, and has a protrusion height larger than that of the reinforcing rib. The intake duct according to claim 4. The upper surface portion is inclined downward toward the front,
The air intake duct according to claim 4 or 5, wherein a lower end portion of the front guide portion is arranged inside the front end portion of the first guide portion in the vehicle width direction. The intake duct according to any one of claims 4 to 6, wherein a lower end portion of the front guide portion is provided in the roof portion side by side with a recess extending in the vehicle length direction in the up-down direction. ..

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