JP2021088234A - Airflow guide structure - Google Patents

Abstract

To suppress a material cost while reducing air resistance caused by travel wind, in an airflow guide structure provided on a cargo box of a vehicle.SOLUTION: An airflow guide structure 1 installed on a cargo box 2 of a vehicle is provided with a pair of airflow guide members 7 each having a curved airflow guide surface 8 protruding forward from an upper corner portion 24 on a front surface 22 of the cargo box 2. The pair of airflow guide members 7 are arranged spaced apart from each other in a vehicle width direction WD. When a vehicle is travelling, travelling wind flows along the airflow guide surface 8, which locally reduces air resistance at the corner portion 24. Further, by arranging the pair of wind guide members 7 spaced apart, a material is reduced as compared with the case where the wind guide members are installed over the entire length in the vehicle width direction WD on the front surface 22 of the cargo box 2.SELECTED DRAWING: Figure 2

Description

This case relates to a wind guide structure for reducing air resistance due to running wind in a vehicle packing box.

Conventionally, in a vehicle such as a truck having a packing box behind the cab, it is an issue to reduce the air resistance during traveling. To solve this problem, a device is provided on the front surface of the packing box in which a horizontal baffle plate over the entire length in the vehicle width direction and a pair of baffle plates perpendicular to the horizontal baffle plate are combined in a grid shape. Therefore, a technique for reducing air resistance has been proposed (see Patent Document 1).

Japanese Unexamined Patent Publication No. 9-39845

It is desired to reduce the cost of a structure that reduces air resistance due to running wind in a vehicle packing box. However, as described in Patent Document 1, the structure in which the baffle plate is provided over the entire length in the vehicle width direction on the front surface of the packing box has room for improvement in reducing the material cost.

This case was devised in view of the above-mentioned problems, and one of the purposes is to reduce the material cost while reducing the air resistance due to the running wind in the wind guide structure provided in the packing box of the vehicle. To do.

This case was made to solve at least a part of the above problems, and can be realized as the following aspects or application examples.
The wind guide structure according to this application example is a wind guide structure provided in a cargo box of a vehicle, and has a curved wind guide surface protruding forward from an upper corner on the front surface of the cargo box, and is a vehicle. It is characterized by having a pair of air guiding members arranged at intervals in the width direction.

The air resistance due to the running wind tends to be maximized at these corners because the region of the upper corner on the front surface of the packing box becomes high pressure due to the air flowing toward the side of the vehicle. Therefore, by providing a wind guide member having a curved wind guide surface protruding forward from these corners, it is possible to locally treat the traveling wind. Therefore, the air resistance on the front surface of the packing box is reduced. Further, since the pair of wind guide members are arranged at intervals in the vehicle width direction, the material is reduced as compared with the air guide members arranged over the entire length in the vehicle width direction on the front surface of the packing box. As a result, the material cost is suppressed.

According to this case, in the wind guide structure provided in the cargo box of the vehicle, the material cost can be suppressed while reducing the air resistance due to the running wind.

It is a side view of the front part of the vehicle to which the wind guide structure as an embodiment is applied. It is a front view (arrow view in the A direction of FIG. 1) of the cargo box of the vehicle of FIG.

The wind guide structure as an embodiment will be described with reference to the drawings. The embodiments shown below are merely examples, and there is no intention of excluding the application of various modifications and techniques not specified in this embodiment. Each configuration of the following embodiments can be variously modified and implemented without departing from their gist. In addition, it can be selected as needed, or can be combined as appropriate.

[1. Constitution]
As shown in FIG. 1, the wind guide structure 1 of the present embodiment is provided in the packing box 2 of the vehicle 3 which is a truck. Hereinafter, the forward direction of the vehicle 3 is defined as forward (FR), the opposite direction is defined as rear, and the left and right are determined with reference to the front. Further, the direction of action of gravity is downward, and the opposite direction is upward (UP). The left-right direction corresponds to the vehicle width direction WD.

The vehicle 3 has a cab 4 provided with a driver's seat (not shown), a roof spoiler 5 mounted on the upper surface 41 of the cab 4, and a packing box 2 arranged behind the cab 4 and the roof spoiler 5.
The cab 4 is located at the foremost part of the vehicle 3, and its upper surface 41 is provided at a position (lower) lower than the upper surface 21 of the packing box 2.

The roof spoiler 5 is provided so as to fill a step between the upper surface 41 of the cab 4 and the upper surface 21 of the packing box 2. More specifically, the roof spoiler 5 has an outer surface that extends streamlined from the front surface 42 of the cab 4 to the upper surface 21 of the packing box 2. The roof spoiler 5 guides the wind from the front (running wind) to the upper surface 21 and the side surface 23 of the packing box 2 when the vehicle 3 is traveling. As a result, the roof spoiler 5 suppresses that the traveling wind directly hits the front surface 22 of the packing box 2 and becomes a resistance.
The packing box 2 is a square member having a storage space inside for storing cargo. The upper surface 21, the front surface 22, and the side surface 23 of the packing box 2 are all substantially rectangular in a plan view, and are arranged substantially at right angles to each other. The front surface 22 of the packing box 2 faces the roof spoiler 5 with a gap.

A pair of guide members 6 for guiding rainwater are provided on the front surface 22 of the packing box 2 of the present embodiment. As shown in FIG. 2, the guide member 6 is a rail-shaped member having a U-shaped cross section that serves as a flow path for rainwater, and is an upper edge portion (corner portion between the front surface 22 and the upper surface 21) of the front surface 22 of the packing box 2. It is provided on a downward slope from the left and right edges (each corner of the front surface 22 and the left and right side surfaces 23). The pair of guide members 6 are arranged at intervals in the vehicle width direction WD. The guide member 6 guides the rainwater flowing from the upper surface 21 to the front surface 22 of the packing box 2 to the outside (side surface 23 side) of the vehicle width direction WD.

Hereinafter, of the front surface 22 of the packing box 2, two corner portions 24, which are connection portions with the upper surface 21 and the side surface 23, will be described. These corners 24 are upper corners on the front surface 22 of the packing box 2, which is substantially rectangular in front view (plan view).
In the present embodiment, the upper end portion 51 of the roof spoiler 5 is slightly lower than the upper surface portion 21 of the packing box 2, and the left and right end portions 53 of the roof spoiler 5 are inside the vehicle width direction WD of the side surface 23 of the packing box 2. positioned. Therefore, the corner portion 24 on the front surface 22 of the packing box 2 is exposed in the front view of the vehicle 3 when the air guiding member 7 described later is not provided, and receives the traveling wind when the vehicle 3 is traveling.

The air guide structure 1 includes a pair of air guide members 7 provided on the front surface 22 of the packing box 2 as a configuration for reducing the air resistance on the front surface 22 of the packing box 2. The wind guide member 7 has a curved wind guide surface 8 projecting forward from the corner portion 24. The wind guide surface 8 is configured to facilitate the flow of running wind.

In FIG. 2, a virtual auxiliary line along the wind guide surface 8 is shown by a thin line. The wind guide surface 8 of the present embodiment has a shape in which the amount of protrusion in the forward direction is maximum near the corner portion 24 and decreases inward and downward in the vehicle width direction WD. A minute gap is secured between the wind guide surface 8 and the roof spoiler 5.

The wind guide member 7 of the present embodiment is provided in a region above the guide member 6 and outside the vehicle width direction WD. More specifically, the wind guide member 7 is provided over substantially the entire substantially right-angled triangular region having the guide member 6 as the hypotenuse in the front view of the front surface 22 of the packing box 2. Therefore, the pair of wind guide members 7 are arranged at intervals in the vehicle width direction WD.

As the material of the wind guide member 7, various materials such as metal, glass fiber, and plastic can be applied. Further, the air guide member 7 may be integrally molded with the front surface 22 of the packing box 2, or may be retrofitted to the front surface 22 of the packing box 2. The method of attaching the air guide member 7 to the front surface 22 of the packing box 2 is not particularly limited, and for example, an adhesive may be used, or a fastener such as a rivet or a bolt may be used.

[2. Action and effect]
When the vehicle 3 is traveling as described above, the air resistance due to the traveling wind is such that the region of the upper corner 24 on the front surface 22 of the packing box 2 becomes high pressure due to the air flowing toward the side (left and right) of the vehicle 3. It is known that these corners 24 are the largest. On the other hand, the wind guide structure 1 includes a wind guide member 7 having a curved wind guide surface 8 projecting forward from the upper corner 24 on the front surface 22 of the packing box 2, so that the traveling wind is guided. It can flow along the wind surface 8. As a result, the pressure increase of the traveling wind in the vicinity of the corner portion 24 is suppressed, so that the air resistance due to the traveling wind can be locally (pinpointed) reduced in the corner portion 24. Therefore, the air resistance on the front surface 22 of the packing box 2 can be efficiently reduced.

Further, since the pair of wind guide members 7 are arranged at intervals in the vehicle width direction WD, the material is reduced as compared with the air guide members arranged over the entire length of the vehicle width direction WD on the front surface 22 of the packing box 2. it can. As a result, the material cost of the wind guide member 7 can be suppressed. Further, by reducing the material of the wind guide member 7, it also contributes to the weight reduction of the vehicle 3.

As a method for reducing the air resistance at the corner portion 24, it is conceivable to form the corner portion 24 itself in a round shape (curved surface shape). However, even if the air resistance of the packing box 2 having the rounded corners 24 can be reduced, the volume (volume of the accommodation space) of the packing box 2 is reduced, so that the maximum load capacity of the cargo is lowered. On the other hand, according to the air guide structure 1, the air resistance is reduced by providing the air guide member 7 at the corner portion 24, so that the volume of the packing box 2 can be maintained. Therefore, it is possible to avoid a decrease in the maximum load capacity of the cargo while reducing the air resistance.

In the front surface 22 provided with the guide member 6, the air guiding member 7 is provided in the region above the guide member 6 and outside the vehicle width direction WD, so that interference between the air guiding member 7 and the guide member 6 can be prevented. .. As a result, it is possible to reduce the air resistance of the air guiding member 7 without impairing the function of the guide member 6.

[3. Modification example]
The shape of the wind guide member 7 is an example. The air guide member 7 may have a curved air guide surface 8 projecting forward from the upper corner 24 on the front surface 22 of the packing box 2, and as described above, has a substantially right-angled triangular shape when viewed from the front. It is not limited to the shape that covers almost the entire area of. The wind guide member 7 may be provided only on the above two corners 24, for example.

The shape of the roof spoiler 5 described above is also an example. The height position (position in the vertical direction) of the upper end portion 51 of the roof spoiler 5 may be equal to or higher than the height position of the upper surface portion 21 of the packing box 2.
The wind guide structure 1 can be applied to the packing boxes 2 of various vehicles 3, for example, when the roof spoiler 5 and the guide member 6 are omitted from the packing boxes of vehicles. However, as described above, the material cost can be suppressed while reducing the air resistance due to the running wind.

1 Wind guide structure 2 Cargo box 3 Vehicle 4 Cab 5 Roof spoiler 6 Guide member 7 Wind guide member 8 Wind guide surface 21 Top surface 22 Front surface 23 Side surface 24 Corner 41 Top surface 42 Front surface 51 Top end 53 Left and right ends

Claims (1)

It is a wind guide structure provided in the luggage box of the vehicle.
It has a curved air guide surface protruding forward from the upper corner on the front surface of the packing box, and is provided with a pair of air guide members arranged at intervals in the vehicle width direction.
The wind guide structure is characterized by that.

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