JP6041192B2 - Vehicle air deflector - Google Patents

Description

  The present invention relates to a vehicle air deflector that reduces air resistance caused by a step between a cab and a loading platform during travel of the vehicle.

  Patent Document 1 describes a rectifying device that has a drag foiler and a gap seal and is arranged between a cab and a cargo box. The gap seal is a flexible member such as rubber, and is stretched over the both sides of the truck so as to close the gap between the drag foiler, the cab and the cargo box, and the lower part of the gap seal is the engine room below the cab. A space where the upper part is blocked by the drag foiler is defined. This rectifier rectifies the air flowing along the upper and side portions of the vehicle body when the truck is running, and reduces the resistance of the air received by the vehicle body.

2-136786

  However, in the rectifying device (air deflector) described in Patent Document 1, since the lower part opens toward the engine room arranged below the cab, the air flows from the lower opening when the truck (vehicle) travels. Air flows inside the deflector. For this reason, the pressure by the air which flowed in generate | occur | produces in the front surface of a cargo box (loading platform), and the air resistance as the whole vehicle may increase by generation | occurrence | production of the pressure of the front surface of this loading platform.

  Also, since the gap seal of the flexible member is fixed to both the cab and the loading platform, it is difficult to ensure the required rigidity, and it is necessary to make the gap seal a special material different from the drag foiler. This increases the manufacturing cost of the air deflector and complicates the installation work.

  In addition, since the rear and lower sides of the air deflector are open, the rigidity due to the shape characteristics of the air deflector is low. To ensure the required rigidity, thickening and reinforcement are required, and in either case, the weight increases. Will be invited.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle air deflector capable of ensuring rigidity necessary for an air deflector without causing an increase in weight and capable of reducing air resistance during travel of the vehicle.

In order to solve the above-described problems, an air deflector for a vehicle according to the present invention has a front surface of a loading platform that is spaced apart from the rear surface of the cab and is opposed to the rear side of the cab, the rear surface of the cab having a cab upper surface, a cab rear surface, and left and right outer end surfaces in the vehicle width direction. An air deflector that is mounted to a cab of a vehicle in which a loading platform having a loading platform is mounted and an upper end edge of a loading platform front surface is located above the upper surface of the cab, the upper surface portion, a pair of left and right side portions, a rear portion, and a bottom surface A part. The upper surface portion is formed in a plate shape and extends obliquely rearward and upward from the upper surface of the cab to the vicinity of the upper end edge of the front surface of the loading platform. The whole area of the front edge of the upper surface portion is in close contact with the upper surface of the cab. The pair of left and right side portions are formed in a plate shape and extend downward from both edges of the upper surface portion in the vehicle width direction, and close the side surface of the cab upper space and the side surface of the cab rear space from both sides in the vehicle width direction. . The left and right side surface portions each have a lower side surface portion disposed below the cab upper surface. The front end edges of the lower side surfaces of the left and right side portions are in close contact with the left and right outer end surfaces of the cab in the vehicle width direction. The space above the cab is partitioned into a front portion of the upper surface portion and an upper surface of the cab. The cab rear space is partitioned into a rear portion of the upper surface portion and a cab rear surface. The back surface portion is formed in a plate shape and closes the rear surface of the cab rear space. The bottom portion is formed in a plate shape and closes the lower surface of the cab rear space.

  In the above configuration, the upper surface portion extends obliquely rearward and upward from the upper surface of the cab to the vicinity of the upper end edge of the front surface of the loading platform. For this reason, the traveling wind flowing above the cab is guided to the vicinity of the upper end edge of the front surface of the loading platform obliquely rearward along the upper surface portion. The pair of left and right side portions closes the cab upper space defined by the front portion of the upper surface portion and the cab upper surface from both sides in the vehicle width direction, and is divided by the rear portion of the upper surface portion and the cab rear surface. The cab rear space extends downward from both end edges in the vehicle width direction of the upper surface portion in a state of being closed from both sides in the vehicle width direction. For this reason, the traveling wind that flows above and to the side of the cab is guided to the side of the vehicle by a pair of left and right side portions. In other words, the air deflector guides the traveling wind that flows above and to the side of the cab when the vehicle is traveling to the top and side of the vehicle, and reduces the traveling wind that collides with the step between the cab and the front of the loading platform to generate it on the front of the loading platform. Therefore, the air resistance of the entire vehicle can be reduced.

  In addition, since the upper surface portion extends from the upper surface of the cab to the vicinity of the upper edge of the front surface of the loading platform, the rear space of the cab defined by the rear portion of the upper surface portion is disposed near the front surface of the loading platform, and the rear surface of the rear space of the cab is closed. The rear surface portion is arranged in the vicinity of the front surface of the loading platform. For this reason, the air guided rearward by the air deflector during travel of the vehicle is unlikely to flow between the back surface of the air deflector and the front of the cargo bed. Can be suppressed. In addition, even if traveling wind flows between the back surface of the air deflector and the front surface of the loading platform from above and from the side, it flows into the air deflector because the back surface closes the rear surface of the cab rear space. No, the amount of running wind that flows in can be suppressed. For this reason, it is possible to suppress an increase in air resistance as a whole vehicle by suppressing the pressure generated on the front surface of the loading platform.

  In addition, since the upper end of the cab upper space is partitioned into the front portion of the upper surface portion and the upper end of the cab rear space is partitioned into the rear portion of the upper surface portion, the cab upper space and the cab rear space are mutually in the front-rear direction. A continuous space (hereinafter referred to as a cab peripheral space) is formed. The lower surface of the cab rear space is closed by a bottom surface portion. As a result, the upper surface of the cab peripheral space is closed by the upper surface portion, the side surface by the side surface portion, the front surface by the cab rear surface, the rear surface by the rear surface portion, and the lower surface by the cab upper surface and the bottom surface portion, respectively. It becomes. For this reason, the traveling wind that flows below the vehicle is guided to the rear without flowing into the space around the cab (the inside of the air deflector) when the vehicle is traveling, and pressure due to the traveling wind is generated inside the space around the cab. Compared with the case where the surrounding space is an open space, the air resistance of the entire vehicle can be greatly reduced.

  The air deflector is formed in a closed cross section by an upper surface portion, a pair of left and right side portions, and a bottom surface portion. For this reason, compared with the case where it forms in open cross-section shape, such as U-shaped cross section opened below, for example, strong rigidity is securable. Further, the upper surface portion, the pair of left and right side surface portions, and the bottom surface portion form a closed cross section and extend in a direction intersecting with the back surface portion, and are fixed to the back surface portion. For this reason, since a back surface part restrains the movement of an up-down direction and a left-right direction of a top surface part, a pair of left and right side parts, and a bottom surface part, each member of a top surface part, a pair of left and right side parts, and a bottom surface part The deformation of the air deflector can be suppressed without thickening or reinforcing the wall. Thereby, required rigidity can be ensured without causing an increase in weight.

  Moreover, since it is not necessary to form a deflector using special materials, such as a flexible member, the increase in the manufacturing cost of an air deflector and complication of attachment work can be suppressed.

  According to the present invention, rigidity required as an air deflector can be ensured without causing an increase in weight, and a reduction in air resistance during traveling of the vehicle can be achieved.

1 is an external perspective view of a truck equipped with an air deflector according to the present embodiment. It is a side view of the front part of the truck equipped with the air deflector which concerns on this embodiment. It is a perspective view of the air deflector which concerns on this embodiment. It is a typical side view explaining the cab peripheral space of the air deflector which concerns on this embodiment.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, FR indicates the front of the vehicle, UP indicates the upper side, and IN indicates the inner side in the vehicle width direction. Moreover, in the following description, the left-right direction means the left-right direction with the vehicle facing forward.

  As shown in FIGS. 1 and 2, a truck (vehicle) 1 according to the present embodiment includes a substantially box-shaped cab 2 disposed at the front and a substantially box-shaped loading platform 3 disposed at the rear. .

  The cab 2 includes a roof panel 4, a pair of left and right side panels 5, a rear panel 6, a front panel 7, and a floor panel (not shown) that define the upper side of the cab 2, both sides in the vehicle width direction, the rear side, the front side, and the lower side. ) And is disposed at the front end of the track 1. Each panel intersects with the other four adjacent panels at a substantially right angle, and the cab 2 is formed in a substantially box shape by these panels.

  The loading platform 3 is a substantially rectangular loading platform front surface 9 facing away from the rear surface (rear surface of the rear panel 6) 12 of the cab 2 and facing the loading platform front surface 9 behind the loading platform front surface 9. Shaped rear surface 11 of the loading platform, left and right substantially rectangular loading platform side surfaces 10 facing each other at both ends in the vehicle width direction, upper upper rectangular loading platform upper surface 8 and lower lower rectangular loading platform lower surface (not shown) ) And is mounted in the rear of the cab 2. A cargo compartment (not shown) is defined by the cargo bed front surface 9, the cargo bed rear surface 11, the left and right cargo bed side surfaces 10, the cargo bed upper surface 8, and the cargo bed lower surface. An upper end edge 14 of the load carrier front surface that defines the upper end of the load carrier front surface 9 is disposed above the upper surface 13 of the cab 2 (the upper surface of the roof panel 4). The length in the vehicle width direction of the loading platform front surface 9 is set longer than that of the cab 2, and the vehicle width direction both end edges of the loading platform front surface 9 are wider than the vehicle width direction outer end surfaces of the pair of left and right side panels 5. Arranged on the outside in the direction. The shape of the loading platform 3 is not limited to the box shape and may be any shape as long as it has the loading platform front surface 9 that is separated from the cab rear surface 12 and is opposed to the rear.

  As shown in FIGS. 1 to 3, the air deflector 20 integrally includes an upper surface portion 21, a pair of left and right side surface portions 22, a back surface portion 23, and a bottom surface portion 24. 9 is fixed to the cab 2 so as to cover both ends of the vehicle width direction 9 and the cab upper surface 13.

  The upper surface portion 21 has a plate shape having an upper surface rear end edge 25, an upper surface front end edge 26, and left and right upper surface side edges 27 (both ends of the upper surface portion 21 in the vehicle width direction). The upper surface rear end edge 25 defines the rear end of the upper surface portion 21, and extends in the vehicle width direction in the vicinity of the front of the cargo bed front upper end edge 14 and substantially the same length as the cargo bed front upper edge 14. The upper front edge 26 defines the front end of the upper surface portion 21, extends in the vehicle width direction at the center of the front end portion of the roof panel 4 in the vehicle width direction, and is in close contact with the cab upper surface 13 such as bolts (not shown). Fixed by. The upper surface portion 21 extends from the upper surface front end edge 26 fixed to the cab upper surface 13 so as to be gently curved in an arc shape upward toward the rear upper surface rear end edge 25. The left and right upper surface side edges 27 define both ends of the upper surface portion 21 in the vehicle width direction and extend from both ends of the upper surface rear end edge 25 in the vehicle width direction to both ends of the upper surface front end edge 26 in the vehicle width direction. The distance between the left and right upper surface side edges 27 in the vehicle width direction (the width of the upper surface portion 21 in the vehicle width direction) is gradually narrowed from the upper surface rear edge 25 side toward the upper surface front edge 26. The upper surface portion 21 is gently curved and extended upward in a circular arc shape from the upper surface front end edge 26 toward the upper surface rear end edge 25. However, the upper surface portion 21 is not limited to this. For example, the upper surface portion 21 extends linearly. Also good. Further, the upper surface front end edge 26 extends in the vehicle width direction at the vehicle width direction central portion of the front end portion of the roof panel 4, but may extend in the entire vehicle width direction of the front end portion of the roof panel 4.

  The pair of left and right side surface portions 22 are formed integrally with the upper surface portion 21, have an upper side surface portion 28 and a lower side surface portion 29, and face each other in the vehicle width direction from the left and right upper surface side edge 27. Extends downward.

  The upper side surface portion 28 has a plate shape having an upper side rear end edge 31 that defines the rear end of the upper side surface portion 28 and an upper side lower end edge 30 that defines the lower end of the upper side surface portion 28. The upper side rear end edge 31 is bent from both ends in the vehicle width direction of the upper surface rear end edge 25 and extends in a substantially vertical direction in the vicinity of the front of both end edges in the vehicle width direction of the loading platform front surface 9. The upper side lower edge 30 continuously extends from both ends in the vehicle width direction of the upper front edge 26 and extends to both ends in the vehicle width of the front edge of the roof panel 4, and bends backward from both ends in the vehicle width of the front edge of the roof panel 4. The roof panel 4 extends rearward along both ends in the vehicle width direction and continues to the lower end of the upper side rear end edge 31 in the vicinity of the front surface 9 of the loading platform. The upper side surface portion 28 is formed integrally with the upper surface portion 21 and extends continuously from the left and right upper surface side edge 27 to the lower upper surface lower edge 30. The upper side lower end edge 30 is fixed by a bolt or the like (not shown) while being in close contact with the cab upper surface 13.

  The lower side surface portion 29 has a lower side front end edge 33, a lower side rear end edge 34, and a lower side lower end edge 35 that respectively define a front end, a rear end, and a lower end of the lower side surface portion 29. It is integrally formed and continuously extends downward from the rear end portion of the lower lower edge 30 of the upper side surface behind the rear panel 6. The lower side front end edge 33 is fixed by a bolt or the like (not shown) in a state of being in close contact with the outer end surface of the side panel 5 in the vehicle width direction. The lower side rear edge 34 continuously extends from the lower end of the upper side rear edge 31 in a substantially vertical direction. The lower side lower end edge 35 extends from the lower end of the lower side front end edge 33 to the lower end of the lower side rear end edge 34.

  As shown in FIG. 4, a front side portion (a portion on the front side of the position indicated by a two-dot chain line in FIG. 4) 38 and the cab upper surface 13 define a cab upper space 36. The cab upper space 36 is closed on both sides in the vehicle width direction by a front portion (a portion on the front side of the position indicated by a two-dot chain line in FIG. 4) 40 of the upper side surface portion 28.

  The rear portion of the upper surface portion 21 (the portion on the rear side of the position indicated by the two-dot chain line in FIG. 4) 39 and the cab rear surface 12 define a cab rear space 37. The cab rear space 37 is closed on both sides in the vehicle width direction by a rear side portion 41 (a portion on the rear side of the position indicated by a two-dot chain line in FIG. 4) 41 and the lower side surface portion 29.

  The cab upper space 36 and the cab rear space 37 constitute a cab peripheral space 43 that is continuous in the front-rear direction. The cab peripheral space 43 is closed on both sides in the vehicle width direction by the front side portion 40 of the upper side surface portion 28, the rear side portion 41 of the upper side surface portion 28, and the lower side surface portion 29, that is, by the pair of left and right side portions 22. Is done.

  The back surface portion 23 is a substantially rectangular plate formed integrally with the upper surface portion 21 and the pair of left and right side surface portions 22, and has a back surface lower end edge 42 that connects the rear ends of the lower surface lower end edges 35. And extending upward from the rear lower edge 42. The upper end edge of the back surface portion 23 is fixed to the upper surface rear end edge 25, and the vehicle width direction both end edges of the back surface portion 23 are fixed to the upper side surface rear end edge 31 and the lower side surface rear end edge 34. The back surface portion 23 closes the rear surface of the cab rear space 37.

  The bottom surface portion 24 is a substantially rectangular plate formed integrally with the pair of left and right side surface portions 22 and the back surface portion 23, and is disposed along a direction intersecting with the vertical direction. The rear end edge of the bottom surface portion 24 is fixed to the rear lower end edge 42, both end edges in the vehicle width direction of the bottom surface portion 24 are fixed to the lower side lower end edge 35, and the front end edge of the bottom surface portion 24 extends to the vicinity of the cab rear surface 12. Extend. The bottom surface portion 24 closes the lower surface of the cab rear space 37. Note that the shape of the bottom surface portion 24 is not limited to a substantially rectangular plate shape. For example, when there are auxiliary equipments (not shown) constituting the vehicle behind the rear panel 6, in order to avoid auxiliary equipments and the like. You may have a notch part along shapes, such as auxiliary machinery.

  In the air deflector 20 configured as described above, the upper surface portion 21 is connected to the front upper edge 14 of the loading platform front surface near the front upper edge 14 of the loading platform front surface from the upper front edge 26 fixed in close contact with the cab 2. The upper surface rear end edge 25 that extends in the vehicle width direction with substantially the same length extends obliquely rearward and upward. For this reason, the traveling wind that flows above the cab 2 is guided along the upper surface portion 21 to the vicinity of the upper front edge 14 of the front of the loading platform obliquely rearward. The pair of left and right side surface portions 22 extend downward from the pair of left and right upper surface side edges 27 in a state where the cab upper space 36 and the cab rear space 37 are closed from both sides in the vehicle width direction. The upper side lower end edge 30 and the lower side front end edge 33 are fixed in close contact with the cab 2, and the upper side rear end edge 31 and the lower side rear end edge 34 are the opposite ends of the vehicle front surface 9 in the vehicle width direction. It extends in a substantially vertical direction near the front. For this reason, the air deflector 20 guides the traveling wind that flows above and to the side of the cab 2 when traveling on the truck 1 to the top and side of the truck 1 and collides with the step between the cab 2 and the front surface 9 of the loading platform. Since the pressure generated on the front surface 9 of the cargo bed is reduced and the air resistance of the entire vehicle can be reduced.

  Further, since the back surface portion 23 is disposed in the vicinity of the loading platform front surface 9, the air guided rearward by the upper surface portion 21 of the air deflector 20 and the pair of left and right side surfaces 22 when the truck 1 travels is the air deflector. 20 hardly flows between the back portion 23 and the front surface 9 of the loading platform. For this reason, the pressure which generate | occur | produces in the loading platform front surface 9 can be suppressed, and the increase in the air resistance as the whole vehicle can be suppressed.

  Further, since the rear surface portion 23 closes the rear surface of the cab rear space 37, even if traveling wind flows between the rear surface portion 23 of the air deflector 20 and the front surface 9 of the loading platform, it does not flow into the inside of the air deflector 20. And the amount of running wind that flows in can be suppressed. For this reason, the pressure which generate | occur | produces in the loading platform front surface 9 can be suppressed, and the increase in the air resistance as the whole vehicle can be suppressed.

  Since the upper surface portion 21 and the pair of left and right side surface portions 22 are fixed in close contact with the cab 2, the upper surface of the cab peripheral space 43 is formed by the upper surface portion 21 and the side surface is a pair of left and right side surface portions 22. Thus, the front surface is closed by the cab rear surface 12, the rear surface is closed by the back surface portion 23, the lower surface is closed by the cab upper surface 13 and the bottom surface portion 24, and the cab peripheral space 43 becomes a substantially closed space. For this reason, the traveling wind flowing under the truck 1 during the traveling of the truck 1 is guided backward without flowing into the cab peripheral space 43 (inside the air deflector 20), and the pressure caused by the traveling wind inside the cab peripheral space 43 is As a result, the air resistance of the vehicle as a whole can be greatly reduced as compared with the case where the space around the cab is an open space.

  The air deflector 20 is formed in a closed cross-sectional shape by a plate-shaped upper surface portion 21, a pair of left and right plate-shaped side surface portions 22, and a plate-shaped bottom surface portion 24. For this reason, compared with the case where it forms in open cross-section shape, such as U-shaped cross section opened below, for example, strong rigidity is securable. Further, the upper surface portion 21, the pair of left and right side portions 22, and the bottom surface portion 24 form a closed cross section, extend in a direction intersecting with the rear surface portion 23, and are fixed to the rear surface portion 23. For this reason, since the back surface part 23 restrains the movement of the upper surface part 21, the pair of left and right side surface parts 22 and the bottom surface part 24 in the vertical direction and the left and right direction, the upper surface part 21, the pair of left and right side surface parts 22, and The deformation of the air deflector 20 can be suppressed without thickening or reinforcing the respective members of the bottom surface portion 24. Thereby, required rigidity can be ensured without causing an increase in weight.

  In addition, since it is not necessary to form the air deflector 20 using a special material such as a flexible member, an increase in manufacturing cost of the air deflector 20 and a complicated installation work can be suppressed.

  Next, a decrease in air resistance received by the truck 1 when the air deflector 20 in which the cab peripheral space 43 is a substantially closed space is installed will be described based on a verification result using a wind tunnel analysis.

  In this wind tunnel analysis, a wind tunnel in which a cross-sectional air region having a length of 4.4 m in the vertical direction and a length of 20 m in the vehicle width direction extends 30 m in the front-rear direction is configured on the computer, The front part of the vehicle is arranged in the center of the vehicle toward the entrance of the wind tunnel, and an air flow of 100 km / h is introduced from the entrance of the wind tunnel, thereby obtaining the air resistance that the vehicle traveling at 100 km / h receives from the front in the traveling direction. Is. The air resistance experienced by a vehicle is measured by the pressure loss, which is the pressure difference between the pressure at the wind tunnel inlet and the pressure at the wind tunnel outlet.

  First, an analysis model of a truck equipped with an air deflector without the back surface portion 23 and the bottom surface portion 24 of the air deflector 20 (the cab peripheral space 43 is an open space) is arranged in the wind tunnel, and 100 km / h from the wind tunnel entrance. The analysis was conducted with a flow of air. In this case, it was confirmed that air flows into the cab peripheral space 43. The pressure loss was confirmed to be 0.12621 kpa.

  Next, an analysis model of the truck 1 equipped with the air deflector 20 according to this embodiment in which the cab peripheral space 43 is a substantially closed space is placed in the wind tunnel, and an analysis is performed by flowing an air flow of 100 km / h from the entrance of the wind tunnel. went. In this case, it was confirmed that air does not flow into the cab peripheral space 43. The pressure loss was confirmed to be 0.12455 kpa.

  Therefore, in the truck 1 equipped with the air deflector 20 according to this embodiment in which the cab peripheral space 43 is a substantially closed space, the pressure loss is about 1 as compared with the truck equipped with the air deflector in which the cab peripheral space 43 is an open space. It was confirmed that the air resistance received by the truck 1 can be reduced more than a truck equipped with an air deflector in which the cab peripheral space 43 is an open space.

  Next, the matchbox rigidity of the air deflector 20 having the back surface portion 23 and the bottom surface portion 24 will be described based on a verification result of an experiment using an analysis model of the air deflector. Here, the match box rigidity is rigidity against match box deformation, and is expressed as a deformation amount of match box deformation with respect to a predetermined load. Matchbox deformation refers to deformation that collapses into a parallelogram shape (for example, deformation that causes the outer frame portion of the matchbox with the sliding inner box removed to collapse into a parallelogram shape with a slight external force).

  This matchbox stiffness analysis is performed by applying a predetermined load in a predetermined direction to the air deflector analysis model whose material is set to SMC (Sheet Molding Compound) on the computer and changing the thickness of the air deflector to various values. The amount of deformation of the match box (match box stiffness) is measured by changing the thickness of the air deflector and the thickness and weight of the air deflector at a predetermined match box stiffness.

  First, in the analysis model of the air deflector without the back surface portion 23 and the bottom surface portion 24 of the air deflector 20, the thickness of the air deflector necessary for ensuring a predetermined match box rigidity (1.81 mm / 9800 N) is 50 mm. It was confirmed that the weight at that time was 322.6 kg.

  Next, in the analysis model of the air deflector 20 according to the present embodiment having the back surface portion 23 and the bottom surface portion 24, the thickness of the air deflector necessary for ensuring a predetermined match box rigidity (1.77 mm / 9800 N) is It was 11.4 mm, and the weight at that time was confirmed to be 163.6 kg.

  Therefore, the air deflector 20 according to the present embodiment can suppress the necessary wall thickness largely with the same material SMC as compared with the air deflector having substantially the same match box rigidity without the back surface portion 23 and the bottom surface portion 24. It was confirmed that the weight could be reduced by about 50%. That is, since the air deflector 20 has the back surface portion 23 and the bottom surface portion 24, the thickness of the material can be largely suppressed, and the rigidity necessary for the air deflector can be ensured without causing an increase in weight. Verified.

  Thus, according to the present embodiment, it is possible to ensure the rigidity necessary for the air deflector without increasing the weight and to reduce the air resistance when the vehicle is traveling.

  As described above, the present invention has been described based on the above embodiment, but the present invention is not limited to the content of the above embodiment, and can be appropriately changed without departing from the present invention. is there. That is, it is needless to say 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.

  For example, in the above-described embodiment, the air deflector 20 integrally includes the upper surface portion 21, the left and right pair of side surface portions 22, the back surface portion 23, and the bottom surface portion 24, but includes each surface portion as a separate member. Also good.

  Further, in order to favorably guide the traveling wind to the rear or side when the truck 1 is traveling, the upper surface portion 21 or the pair of left and right side surface portions 22 may be provided with unevenness.

  Further, the upper surface portion may be a variable upper surface portion capable of changing the inclination angle of the upper surface portion.

  Moreover, you may equip the front part of an upper surface part with the embedded signboard lamp.

1: Truck (vehicle)
2: Cab 3: Cargo platform 4: Roof panel 6: Rear panel 9: Cargo front surface 12: Cab rear surface 13: Cab upper surface 14: Cargo front upper edge 20: Air deflector 21: Upper surface portion 22: A pair of left and right side portions 23: Rear surface Part 24: Bottom part 28: Upper side part 29: Lower side part 36: Cab upper space 37: Cab rear space 38: Front part 39 on the upper part 39: Rear part 43 on the upper part 43: Cab peripheral space

Claims (1)

A loading platform having a loading platform front face facing away from the rear surface of the cab is mounted on the rear side of the cab having a cab upper surface, a cab rear surface, and left and right vehicle width direction outer end surfaces, and an upper end edge of the loading platform front surface is the cab. An air deflector fixed to the cab of the vehicle located above the upper surface,
A plate-like upper surface portion extending obliquely upward from the upper surface of the cab to the vicinity of the upper edge of the front surface of the loading platform;
A side surface of a cab upper space that extends downward from both end edges of the upper surface portion in the vehicle width direction and is defined by a front portion of the upper surface portion and the cab upper surface, a rear portion of the upper surface portion, and a rear surface of the cab. A pair of left and right plate-like side portions for closing the side surface of the cab rear space to be partitioned from both sides in the vehicle width direction;
A plate-like back surface portion for closing a rear surface of the cab rear space;
A plate-like bottom portion for closing the lower surface of the cab rear space,
The front end edge of the upper surface portion is in close contact with the upper surface of the cab ,
The left and right side portions each have a lower side portion disposed below the upper surface of the cab,
The vehicle air deflector according to claim 1, wherein front end edges of the lower side surface portions of the left and right side surface portions are in close contact with the left and right outer end surfaces in the vehicle width direction of the cab .

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