JP2016074239A - Air resistance reduction structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to reduce an air resistance of a vehicle equipped with a guard frame and to improve a fuel consumption.SOLUTION: A guard frame body 5 has an upper end part 5b which extends in a vehicle width direction below a ceiling plane 2a of a cab 2, and is so fixed to a vehicle body side as to be separated rearwards from a rear face 2b of the cab 2. A movable member 6 extends in the vehicle width direction, and is so supported on the guard frame body 5 as to be movable between a use position where the movable member projects above the ceiling plane 2a from the upper end part 5b of the guard frame body 5 and a storage position where the movable member does not project above the ceiling plane 2a.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a structure for reducing air resistance of a vehicle.

  Conventionally, a structure for reducing the air resistance of a vehicle is known. The air resistance reduction structure described in Patent Document 1 is used for a flat body vehicle with a hood, and extends between a pair of vertical flat bars extending from both sides of the torii, and the pair of vertical flat bars. And a horizontal flat bar. This air resistance reduction structure realizes a reduction in air resistance in front of the hood by fixing it to a height corresponding to the height of the hood. And, in the state where the hood is folded, the air resistance reduction structure can fix the horizontal flat bar so as to contact the torii so that the horizontal flat bar does not become a source of air resistance. It has become.

JP 2000-038170 A

  The torii is intended to fix the luggage and to protect the ceiling surface of the cab from the luggage, and is provided at the front part of the loading platform so as to be higher than the ceiling surface of the cab. For this reason, even when the air resistance reduction structure described above is adopted, when traveling with the hood folded, the ascending step or gap between the cab's ceiling and the torii gate will cause air resistance, resulting in poor fuel consumption. It will lead to. Such a problem occurs not only in a flat body vehicle with a hood but also in a flat body vehicle without a hood.

  Therefore, an object of the present invention is to provide an air resistance reduction structure that further reduces air resistance and improves fuel consumption.

  In order to achieve the above object, the air resistance reduction structure of the first aspect of the present invention includes a torii body and a movable member.

  The torii body has an upper end portion that extends in the vehicle width direction below the cab ceiling surface, and is spaced apart from the rear surface of the cab to be fixed to the vehicle body side. The movable member extends in the vehicle width direction and is supported by the torii body so as to be movable between a use position that protrudes upward from the top surface of the torii body and a storage position that does not protrude above the ceiling surface. The

  A second aspect of the present invention is the air reduction structure according to the first aspect, wherein the movable member is rotatably supported on the upper end portion of the torii body about the rotation axis extending in the vehicle width direction. It moves from the use position rising from the upper end to the storage position by tilting forward or backward about the rotation axis.

  A third aspect of the present invention is the air reduction structure according to the first aspect, wherein the movable member is provided in the torii body so as to be slidable in the vertical direction, and moves to the storage position by descending from the use position. .

  In the above configuration, when loading a load on the loading platform, the movable member provided in the torii body is set to the use position. In this case, the movable member is higher than the ceiling surface of the cab. Thereby, a movable member protects the ceiling surface of a cab from a load.

  On the other hand, when the luggage is emptied without loading, or when the luggage is loaded in a range not higher than the height of the ceiling of the cab, the movable member is set to the storage position. In this case, the movable member is substantially flush with the ceiling surface of the cab, or is lower than the ceiling surface of the cab. Thereby, the movable member does not cause an upward step between the ceiling surface of the cab and the movable member.

  Therefore, air resistance can be reduced and fuel consumption can be improved.

  The air resistance reducing structure according to the fourth aspect of the present invention is the air resistance reducing structure according to the second aspect, and the movable member moves forward from the use position to the retracted position. The movable member in the retracted position extends forward from the upper end of the torii body and covers the space between the cab and the torii body from above.

  In the above configuration, the movable member at the retracted position covers the space between the cab and the torii body from above, so that the airflow from the ceiling surface of the cab is prevented from flowing into the gap between the cab and the torii body. For this reason, the pressure increase behind the rear surface of the cab is promoted, and the effect of reducing the air resistance is increased, which contributes to the propulsive force of the vehicle.

  Therefore, the fuel consumption can be further improved.

  According to the air resistance reduction structure of the present invention, air resistance can be reduced and fuel consumption can be improved.

1 is a schematic side view of a vehicle that employs an air resistance reduction structure according to a first embodiment of the present invention. It is a perspective view which shows the torii of FIG. It is a typical side view of the upper part of the torii of FIG. 1, (a) shows the state which set the movable member to the use position, (b) shows the state which set the movable member to the storing position. It is a typical side view of the upper part of the torii which concerns on 2nd Embodiment of this invention, (a) is the state which set the movable member to the use position, (b) is the state which fell the movable member sideways, (C) shows the state which folded the movable member to the storing position, respectively. It is a typical sectional side view of the upper part of the torii which concerns on 3rd Embodiment of this invention, (a) is the state which set the movable member to the use position, (b) is the state which set the movable member to the storing position Respectively.

  Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.

  A vehicle 1 shown in FIG. 1 is a flat body vehicle, and includes a cab 2, a loading platform 3, and a torii 4.

  The torii 4 is disposed rearwardly from the rear surface 2b of the cab 2, and is fixed to the front part (vehicle body side) of the loading platform 3. The torii 4 employs the air resistance reduction structure of the present invention, and includes a torii body 5 and a movable member 6.

  The torii body 5 has an inverted U shape, and a pair of left and right side frames 5a that stand up apart in the vehicle width direction and an upper frame 5b that connects the upper ends of the left and right side frames 5a (the upper end of the torii body 5). Part). The lower part of the side frame 5a is fixed to the loading platform 3, and the upper frame 5b extends in the vehicle width direction below the ceiling surface 2a of the cab 2 (at a height position lower than the ceiling surface 2a).

  The movable member 6 is a plate extending in the vehicle width direction, and is rotatably connected to the upper front end portion of the upper frame 5b via a hinge 10. The rotation shaft 10a of the hinge 10 extends in the vehicle width direction, and the movable member 6 is centered on the rotation shaft 10a from the use position (see FIG. 3A) standing up from the upper surface of the upper frame 5b of the torii body 5 As shown in FIG. 3B, it can be tilted between the storage position (refer to FIG. 3B) that has fallen forward (falls sideways toward the front). The movable member 6 in the use position extends upward from the upper frame 5 b and protrudes upward from the ceiling surface 2 a of the cab 2. On the other hand, the movable member 6 in the retracted position is substantially flush with the ceiling surface 2a of the cab 2 (approximately the same height as the ceiling surface 2a) and does not protrude upward from the ceiling surface 2a. Moreover, the movable member 6 in the retracted position extends forward from the upper frame 5b substantially horizontally and covers the space between the rear surface 2b of the cab 2 and the torii body 5 from above. The movable member 6 is releasably held with respect to the torii body 5 at a use position and a storage position by a lock mechanism (not shown). The movable member 6 may be lower than the ceiling surface 2a of the cab 2 at the storage position.

  Next, the airflow above the cab 2 when the vehicle 1 is traveling will be described. In addition, the arrow in drawing shows the direction of airflow.

  As shown in FIG. 3 (a), when the movable member 6 is erected to use the torii 4 (set to the use position), a part of the air flowing above the cab 2 is movable. It collides with the member 6 and flows into the gap between the cab 2 and the torii body 5 and air resistance is generated. Further, a part of the remaining air becomes a vortex that circulates behind the movable member 6, and air resistance is generated.

  On the other hand, as shown in FIG. 3 (b), when the movable member 6 was tilted sideways (set to the retracted position) in order not to use the torii 4, it flowed above the cab 2. The air passes above the movable member 6 that is tilted sideways and flows toward the rear of the vehicle 1.

  According to this embodiment, when loading a load on the loading platform 3, the movable member 6 provided on the torii body 5 is erected (see FIG. 3A). In this case, the movable member 6 is higher than the ceiling surface 2 a of the cab 2. Thereby, the movable member 6 protects the ceiling surface 2a of the cab 2 from the load.

  Further, when the luggage 3 is emptied without loading the luggage, or when the luggage is loaded on the luggage bed 3 within a range not higher than the height of the ceiling surface 2a of the cab 2, the movable member 6 is tilted sideways (FIG. 3B). reference). In this case, the movable member 6 is substantially flush with the ceiling surface 2 a of the cab 2. Thereby, the movable member 6 does not make an ascending step between the ceiling surface 2 a of the cab 2 and the movable member 6.

  Therefore, air resistance can be reduced and fuel consumption can be improved.

  Furthermore, the movable member 6 tilted forward closes the gap between the ceiling surface 2a of the cab 2 and the torii body 5 (see FIG. 3B). Thereby, the air current from the ceiling surface 2 a of the cab 2 is blocked from entering the gap between the rear of the cab 2 and the torii body 5. As a result, the pressure increase behind the cab 2 is promoted. The pressure increase behind the cab 2 leads to the driving force of the vehicle 1. For this reason, this embodiment is particularly effective when the distance between the cab 2 and the torii body 5 is large, that is, when the gap between the rear of the cab 2 and the torii body 5 is large.

  Therefore, the fuel consumption can be further improved.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings. The vehicle 7 according to the second embodiment includes a torii 8 instead of the torii 4 according to the first embodiment, and the same components as those in the first embodiment are denoted by the same reference numerals. The description is omitted.

  The movable member 9 is a plate extending in the vehicle width direction, and is rotatably connected to the upper rear end portion of the upper frame 5b via a hinge 10, as shown in FIG. The rotation shaft 11a of the hinge 11 extends in the vehicle width direction, and the movable member 9 is centered on the rotation shaft 11a from the use position (see FIG. 4A) standing up from the upper surface of the upper frame 5b of the torii body 5. As shown in FIG. 4 (c), it can be tilted with respect to the storage position (see FIG. 4 (c)) that is reversed from the use position through the state of being tilted sideways toward the rear (see FIG. 4 (b)). As described above, the movable member 9 is folded from the standing state by being inverted from the use position to the storage position. The movable member 9 is releasably held at the use position and the storage position by a lock mechanism (not shown).

  Next, a third embodiment of the present invention will be described in detail with reference to the drawings. The vehicle 12 according to the third embodiment includes a torii 13 instead of the torii 4 according to the first embodiment, and the same reference numerals are given to the same configurations as those in the first embodiment. The description is omitted.

  The movable member 14 has a plate shape extending in the vehicle width direction, and as shown in FIG. 5, an upper plate 14a, and a front plate 14b and a rear plate 14c that extend downward from the front and rear ends of the upper plate. The upper end of the upper frame 5b of the torii body 5 is inserted from below between the front plate 14b and the rear plate 14c. A fixed-side pin hole 15 that penetrates in the front-rear direction is formed in the upper frame 5b. On the front plate 14b and the rear plate 14c of the movable member 14, the movable side lower pin hole 16 communicating with the fixed side pin hole 15 in the state where the movable member 14 is set at the use position, and the movable member 14 are set at the storage position. A movable-side upper pin hole 17 communicating with the fixed-side pin hole 15 in the state is formed. The movable member 14 is lifted upward, the front and rear movable lower pin holes 16 are aligned with the fixed side pin holes 15, and the pins 18 are inserted into the pin holes 15 and 16, so that the movable member 14 is releasably held at the use position. Is done. Also, the pin 18 is pulled out from the movable member 14 at the use position, the movable member 14 is lowered, the front and rear movable upper pin holes 17 are aligned with the fixed side pin holes 15, and the pins 18 are inserted into the pin holes 15 and 17. Thus, the movable member 14 is releasably held at the retracted position. As described above, the movable member 14 is provided in the torii body 5 so as to be slidable in the vertical direction, and moves to the storage position by being lowered from the use position.

  As mentioned above, although the embodiment to which the invention made by the present inventor is applied has been described, the present invention is not limited by the discussion and the drawings that form part of the disclosure of the present invention according to this embodiment. That is, it should be added that other embodiments, examples, operation techniques, and the like made by those skilled in the art based on this embodiment are all included in the scope of the present invention.

  The air reduction structure of the present invention can be applied to various vehicles including a torii.

2 Cab 2a Ceiling 2b Rear 4, 8, 13 Torii (Air resistance reduction structure)
5 Torii body 6, 9, 14 Movable members 10a, 11a Rotating shaft

Claims (4)

A torii body having an upper end extending in the vehicle width direction below the ceiling surface of the cab, and spaced apart rearward from the rear surface of the cab and fixed to the vehicle body side;
Extending in the vehicle width direction, supported by the torii body so as to be movable between a use position projecting upward from the ceiling surface from the upper end of the torii body and a storage position not projecting upward from the ceiling surface An air resistance reduction structure for a vehicle, comprising: a movable member. The air resistance reduction structure according to claim 1,
The movable member is rotatably supported by the upper end portion of the torii body about a rotation axis extending in the vehicle width direction, and forward from the use position rising from the upper end portion of the torii body about the rotation axis Or it moves to the said storing position by falling backward, The air resistance reduction structure of the vehicle characterized by the above-mentioned. The air resistance reduction structure according to claim 2,
The movable member moves to the storage position by falling forward from the use position,
The structure for reducing air resistance of a vehicle, wherein the movable member at the storage position extends forward from the upper end of the torii body and covers between the cab and the torii body from above. The air resistance reduction device according to claim 1,
The movable member is provided in the torii main body so as to be slidable in the vertical direction, and moves to the storage position by descending from the use position.

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