JPH1149029A - Car body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress worsening of air resistance by effectively discharging air introduced in a car body by a simple structure, in a car body structure. SOLUTION: In almost a central part of a car body 12, a cabin 13 is provided as a separate unit independently of this car body 12, an air passage 41, passing through a first/second/third passage 45, 46, 48 from an opening 44 formed in a front part of the car body 12 to be penetrated an exhaust port 47, is provided between the cabin 13 and a car body side member 28, an air guide blade 49 is provided in a car body side surface part, also an air introducing hole 51 communicating with the air passage 41 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure provided with a passage for air introduced into the vehicle body from the front.

[0002]

2. Description of the Related Art In order to improve running stability and fuel efficiency by reducing air resistance, it is desirable that an automobile is designed to be streamlined so that there are no protrusions on the outer surface of a vehicle body.
In addition, an engine and a radiator are mounted in the front of the vehicle. An air intake is formed in the front of the vehicle body. The wind cools the engine and radiator and discharges it from below the engine room to the outside.

[0003]

However, in such a conventional vehicle body shape, a cabin is arranged behind the engine room, and the traveling wind introduced into the engine room is discharged outside from below the vehicle body. doing. for that reason,
The air flowing on the outer surface of the vehicle body and the air exhausted from the engine room to the outside collide with each other to form a turbulent flow, which is a factor of deteriorating the air resistance.

An air passage formed in a vehicle body is disclosed, for example, in Japanese Utility Model Laid-Open No. 64-21083. The "vehicle body structure of an automobile" disclosed in this publication has an inclined surface that rises rearward on the lower surface of the rear end of an air duct disposed along the front-rear direction of the vehicle body. The inclined surface is pressed downward by the air flowing through, so that a downward force acts on the rear part of the vehicle body, thereby suppressing the lift force of the vehicle at high speed traveling,
It is possible to prevent a decrease in tire contact load. However, in the “body structure of an automobile” disclosed in this publication,
It is difficult to form an air duct in the vehicle body along the front-rear direction, and there is a problem that the structure becomes complicated and the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a vehicle body structure having a simple structure and capable of effectively discharging air introduced into the vehicle body and suppressing deterioration of air resistance. Aim.

[0006]

According to the first aspect of the present invention, there is provided a vehicle body structure in which a cabin is independently provided at a substantially central portion of a frame-shaped vehicle body separately from the vehicle body. An air passage penetrating from the front part to the rear part of the vehicle body is provided between the cabin and vehicle body side members located on both sides of the cabin. Therefore, the air passage can be easily provided by providing the cabin on the separate vehicle body, and the air introduced from the front part of the vehicle body can be effectively discharged from the rear part through the air passage, so that the engine and the The radiator can be cooled reliably.

In the vehicle body structure according to the second aspect of the present invention, an air introduction hole communicating with the air passage is provided in the side surface of the vehicle body. Therefore, the air introduced from the front part of the vehicle body flows through the air passage, but merges with the air introduced from the air introduction hole on the way, so that the air flow increases and is discharged from the rear part, and the air resistance is reduced. Deterioration is suppressed.

[0008]

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

FIG. 1 is a side view of a vehicle having a vehicle body structure according to an embodiment of the present invention, FIG. 2 is a top view of the vehicle of this embodiment, and FIG. FIG. 4 shows an external view of a vehicle having the vehicle body structure of the present embodiment.

As shown in FIG. 4, a vehicle 11 has a cabin 13 disposed in the center of a vehicle body 12, and a headlamp 14 is mounted on both sides of a front portion of the vehicle body 12, while a rear lamp is shown in FIG. Not equipped with stop lamps. The communication lamps 15 and 1 are located at the front and rear of the vehicle body 12 so as to be located on both sides of the cabin 13.
6, 17, and 18 are mounted. Also, this vehicle 11
In accordance with the vehicle traveling state, the cabin 13 is freely movable between a lower position where the outer surface is substantially flush with the outer surface of the vehicle body 12 and a raised position where the outer surface protrudes upward from the outer surface of the vehicle body 12. ing.

That is, as shown in FIGS. 1 and 2, the cabin 13 is disposed substantially at the center of the vehicle body 12, and is rotatable up and down by support shafts 21 provided on both sides of the front part. . A pair of left and right hydraulic cylinders 22 is mounted on the rear part of the vehicle body 12, and the distal end of the drive rod 23 is connected to the rear surface of the cabin 13. Therefore, by operating the hydraulic cylinder 22 to extend and retract the drive rod 23, the cabin 13 is rotated about the support shaft 21 as a fulcrum, and is brought to a lowered position shown by a solid line in FIG. You can move.

As shown in FIG. 3, a gull wing type door 24 is provided in the cabin 13 which is supported so as to be vertically rotatable with respect to the vehicle body 12. That is, the gull wing type door 24 has an L-shaped vertical cross section, and the upper end thereof is provided at the center of the ceiling of the cabin 13 along the front and rear support portions 1.
3a is rotatably supported by a hinge 25, and is a drive rod 27 of a hydraulic cylinder 26 mounted on the cabin 13.
Is connected to the door 24. Accordingly, by operating the hydraulic cylinder 26 to extend and retract the drive rod 27, the door 24 can be turned between the closed position shown in FIG. 3A and the opened position shown in FIG. 3B. .

Further, as shown in FIG. 1, on both sides of the cabin 13, there are provided vehicle body side members 28 which are connected in a frame shape at a front portion and a rear portion of the vehicle. , Front fender section 29, rear fender section 30, front fender section 29 and rear fender section 3
Side protector 3 as protector section connecting 0
And 1. The front fender section 29, the rear fender section 30, and the side protector 31 are connected so that the outer surfaces thereof are flush with each other, and the side protector 3
1 is located outside the door 24 to face. The side protector 31 is rotatably supported at its lower end by a hinge 32 and is rotatable outward by a hydraulic cylinder (not shown). The outer protector 31 can be used as an occupant's step 33 when rotating outward. it can.

In the vehicle 11, as described above, the cabin 13 is provided independently of the vehicle body 12, and as shown in FIGS. Air passage 41 penetrating from the section to the rear face
Is provided between the vehicle body 12 and the cabin 13. That is, an engine 42 is mounted on the vehicle body 12 in front of the cabin 13, and radiators 43 are disposed on both sides of the engine 42. Openings 44 for taking in the traveling wind are provided on both sides of the front part of the vehicle body.
A first passage 45 extends rearward from 4. A second passage 46 (see FIG. 3A) is formed between the cabin 13 and the side protector 31, and the first passage 4
5 has a rear end communicating with the second passage 46. Furthermore,
Discharge ports 47 are provided on both sides of the rear surface of the vehicle body, and a third passage 48 extends forward from each of the discharge ports 47.
The rear end of the second passage 46 communicates with the third passage 48. Thus, the opening 44, the first passage 45, the second passage 4
6, an air passage 41 is formed by the third passage 48 and the discharge port 47.

As shown in FIG. 1 and FIG.
The wind guide vanes 49 are disposed below the side protector 31 on both side surfaces of the vehicle body 2, and by the operation of a hydraulic cylinder 50 provided on the vehicle body 12, a retracted position into the inside of the vehicle body side member 28 is provided. The outer surface can be moved to a protruding position where the outer surface is substantially flush with the outer surface of the vehicle body side member 28. An air introduction hole 51 is formed between the side protector 31 and the air guide vanes 49 along the front-rear direction.
The air introduction hole 51 has a divergent shape and communicates with the air passage 41 (in particular, the second passage 46). A duct 52 is formed at the rear end of the front fender 29 at the front side of the air introduction hole 51, and a fan 53 is mounted adjacent to the duct 52. By doing so, the air introduction hole 51
Can be blown to the front side.

In the vehicle 11 of the above-described embodiment, when the vehicle 11 is running at low to medium speeds, the hydraulic cylinder 22 is extended as shown by a two-dot chain line in FIG.
Is an ascending position rotated upward. Then, the traveling speed of the vehicle 11 increases, and at the time of high-speed traveling, as shown by a solid line in FIG. 1, the cabin 13 rotates downward and moves to the lowered position by the contraction of the hydraulic cylinder 22, and
Of the cabin 13 and the outer surface of the cabin 13
The air resistance of the vehicle is reduced to improve running stability and fuel efficiency.

Also, when the vehicle 11 is traveling, FIGS.
As shown in FIG. 5, the traveling wind is taken into the vehicle body 12 from the left and right openings 44 and passes through the first passages 45 to cool the radiator 43, and the heat exchanged wind is passed through the second passages 46.
And is discharged from the discharge port 47 to the outside through the third passage 48.

When the vehicle 11 travels at a high speed, the hydraulic cylinder 50 is extended and the air guide vanes 49 are substantially flush with the vehicle body side member 28 as shown in FIGS. 1, 2 and 3 (a). And the fan 53 is driven to drive the fan 53 to blow air from the duct 52 to the front side of the air introduction hole 51. Then, on the front side of the air introduction hole 51, the second passage 4
6 from the duct 52 to the flow velocity of the wind in the second passage 4.
A wind having a flow velocity higher than that of the wind in 6 is sent, and a boundary layer is formed between the two. Therefore, the vehicle body side member 28
The traveling wind flowing on the outer surface of the (front fender section 29) is not introduced into the inside of the front side of the air introduction hole 51, and the wind in the second passage 46 smoothly flows backward. On the other hand, on the rear side of the air introduction hole 51, the running wind flowing through the outer surface of the wind guide vane 49 is introduced into the inside from the rear side of the air introduction hole 51 due to the divergent shape, and To join. Therefore, the amount of air flowing from the second passage 46 to the third passage 48 increases, and the flow velocity increases,
The air is efficiently discharged from the discharge port 47, and the deterioration of the air resistance is suppressed.

When the vehicle 11 is stopped, the hydraulic cylinder is extended to rotate the side protector 31 outward as shown in FIG. 3 (a), and the hydraulic pressure is increased as shown in FIG. 3 (b). By extending the cylinder 26 and rotating the door 24 upward,
The side of the cabin 13 can be opened. Therefore,
The occupant can move the side protector 31 that has turned outward from the cabin 13 using the step 33.

As described above, in the vehicle body structure of the present embodiment, the cabin 13 is provided at substantially the center of the vehicle body 12 and separately from the vehicle body 12, and the opening formed in the front portion of the vehicle body 12 is provided. An air passage 41 is provided between the cabin 13 and the vehicle body side member 28 through the first passage 45, the second passage 46, and the third passage 48, and penetrates to the discharge port 47. And an air introduction hole 51 communicating with the air passage 41 is provided. Therefore, in particular, the vehicle 1
1 when the vehicle is traveling at high speed,
The air is blown from the front to the front side of the air introduction hole 51, and the wind is not introduced into the air introduction hole 51 by the boundary layer at the front side of the air introduction hole 51, but is introduced only from the rear side of the air introduction hole 51. It will join the second passage 46. Therefore, the traveling wind is taken into the vehicle body 12 from the left and right large openings 44, so that the cooling wind without pressure loss can be taken in, while the amount of the wind flowing from the second passage 46 to the third passage 48 increases. By doing so, the air is efficiently exhausted from the exhaust port 47, and the deterioration of the air resistance can be suppressed.

[0021]

As described in detail in the above embodiment, according to the vehicle body structure of the first aspect of the present invention, the cabin is independently provided at substantially the center of the frame-shaped vehicle body separately from the vehicle body. Since the air passage penetrating from the front part to the rear part of the vehicle body is provided between the cabin and the vehicle body side members located on both sides of the cabin, the air passage is easily provided by providing the cabin separately on the vehicle body. The air introduced from the front part of the vehicle body can be effectively discharged from the rear part through this air passage, so that the engine, the radiator and the like can be reliably cooled. As a result, with a simple structure, the air introduced into the vehicle body can be effectively discharged, and the deterioration of the air resistance can be suppressed.

According to the vehicle body structure of the second aspect of the present invention, since the air introduction hole communicating with the air passage is provided in the side surface of the vehicle body, the air introduced from the front part of the vehicle body flows through the air passage. By joining with the air introduced from the air introduction hole on the way, the air flow rate is increased and the air is discharged from the rear surface, so that the deterioration of the air resistance can be suppressed.

[Brief description of the drawings]

FIG. 1 is a side view of a vehicle having a vehicle body structure according to an embodiment of the present invention.

FIG. 2 is a top view of the vehicle according to the embodiment.

FIG. 3 is a sectional view of a main part of the vehicle body, showing the operation of a door and a wind guide vane.

FIG. 4 is an external view of a vehicle having the vehicle body structure of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Vehicle 12 Body 13 Cabin 14 Headlamp 21 Support shaft 22 Hydraulic cylinder 24 Door 26 Hydraulic cylinder 28 Body side member 29 Front fender part 30 Rear fender part 31 Side protector (protector part) 41 Air passage 43 Radiator 44 Opening part 45 First passage 46 second passage 47 discharge port 48 third passage 49 air guide vane 51 air guide hole 52 duct 53 fan

Claims (2)

[Claims] 1. A cabin is provided at substantially the center of a frame-shaped vehicle body separately from the vehicle body, and an air passage penetrating from a front portion to a rear surface portion of the vehicle body is provided between the cabin and the cabin. A vehicle body structure provided between vehicle body side members located on both sides. 2. The vehicle body structure according to claim 1, wherein an air introduction hole communicating with the air passage is provided in the vehicle body side portion.