Active drag reduction device of van semitrailer

Abstract

The active drag reduction device comprises a cargo compartment, a fixing frame is fixedly connected to one side of the cargo compartment, second air channels are formed in the fixing frame at equal intervals, fixing plates are installed on the inner walls of the second air channels, rotating shafts are rotationally connected to the interiors of the fixing plates, and fan blades are fixedly connected to one ends of the rotating shafts; the utility model has the beneficial effects that by arranging the first air duct, the diversion trench, the second air duct, the driving motor, the rotating shaft and the fan blades, the vortex formed at the tail part of the cab can be sucked and discharged, and the accumulation of the vortex between the cab and the cargo compartment is reduced, so that the pneumatic resistance of the truck in the high-speed running process is reduced; by arranging the push block, the adjusting plate, the reset spring, the clamping block, the clamping groove and the filter plate, the dustproof function is achieved in the drag reduction process, meanwhile, the filter plate can be rapidly detached, cleaned and replaced, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of drag reduction devices, in particular to an active drag reduction device for a box-type semitrailer. Background Art

[0002] The van semi-trailer is modified or manufactured separately on the chassis of a van car. It can be divided into passenger van type and carriage type according to the difference of its carriage. The passenger van type carriage and the cab are generally of integral structure, such as ambulances, accommodation vehicles, environmental testing vehicles, dining cars, TV broadcast vehicles, etc. The carriage type carriage and the cab are generally of split structure, such as van-type LTL transport vehicles, refrigerated and insulated vehicles, etc. The specific structural form of the carriage varies according to its function. In addition to the functions of a general carriage, the refrigerated and insulated vehicle carriage also has the functions of heat insulation and heat preservation. The roof of the convertible top carriage can be lifted vertically to change the volume of the carriage to meet the loading and unloading requirements of different goods. The wing-opening carriage is convenient for loading and unloading of goods and improves loading and unloading efficiency. An eddy current zone will be generated between the gap between the cab and the cargo compartment of the van semi-trailer, thereby increasing the aerodynamic resistance of the truck and increasing the fuel consumption of the engine.

[0003] An active drag reduction device and a semi-trailer cargo compartment are disclosed in the Chinese utility model patent application number: CN202220405904.2. The vortex formed at the rear of the cab can be attracted by the supercharging device, flow into the first air duct and be discharged, reducing the vortex gathering between the cab and the cargo compartment, thereby reducing the aerodynamic resistance of the truck during high-speed driving and reducing the fuel consumption of the engine.

[0004] Although the above device realizes the function of active drag reduction, the above patent has the following disadvantages when used: the active drag reduction device in the prior art usually lacks a protective mechanism when used, and dust easily enters through the air duct, and then adheres to the fan blades and enters the motor, which easily causes damage to the motor and blockage of the fan blades, making it inconvenient to use. Therefore, we propose an active drag reduction device for a box-type semi-trailer. Utility Model Content

[0005] The purpose of the utility model is to provide an active drag reduction device for a box-type semi-trailer, so as to solve the problem that the active drag reduction device proposed in the above-mentioned background technology usually lacks a protective mechanism when in use, and dust can easily enter through the air duct, and then adhere to the fan blades and enter the inside of the motor, which can easily cause damage to the motor and blockage of the fan blades.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An active drag reduction device for a box-type semi-trailer comprises a cargo box, a fixing frame fixedly connected to one side of the cargo box, a second air duct is equidistantly provided inside the fixing frame, a fixing plate is installed on the inner wall of the second air duct, a rotating shaft is rotatably connected inside the fixing plate, a fan blade is fixedly connected to one end of the rotating shaft, a first air duct is equidistantly provided inside the fixing frame and below the second air duct, a filter plate is provided inside the first air duct and inside the second air duct, an adjustment plate is equidistantly slidably connected inside the fixing frame, a clamping block is equidistantly fixedly connected to the top of the adjustment plate, and a clamping groove used in conjunction with the clamping block is equidistantly provided on the bottom of the filter plate.

[0008] It can be understood that the utility model facilitates the discharge of the vortex formed at the rear of the cab through the provision of the second air duct, and the rotation of the shaft drives the fan blades to rotate, thereby assisting in the discharge of the vortex formed at the rear of the cab, and the provision of the first air duct allows more vortexes to be discharged, and the provision of the filter plate allows the air to be filtered when it enters the air, and the movement of the adjustment plate drives the block to move, so that the block moves into the interior of the slot, thereby limiting and fixing the position of the filter plate.

[0009] Preferably, guide grooves are equidistantly provided inside the fixing frame, and the first air duct is connected with the second air duct through the guide grooves.

[0010] It can be understood that, in the present invention, the provision of the guide groove facilitates more eddies to enter the interior of the second air duct, thereby facilitating the discharge of the eddies.

[0011] Preferably, a driving motor is fixedly connected to one side of the fixing plate, and an output end of the driving motor is fixedly connected to the rotating shaft.

[0012] It can be understood that the utility model drives the rotating shaft to rotate by driving the motor.

[0013] Preferably, the interior of the fixing frame is provided with storage grooves at equal intervals, and the adjustment plate is slidably connected to the storage grooves.

[0014] It can be understood that the utility model limits the movement of the adjustment plate by setting the receiving groove.

[0015] Preferably, a limiting slide bar is fixedly connected to the interior of the storage groove, the adjustment plate is slidably connected to the limiting slide bar, and a return spring is sleeved on the outer side of the limiting slide bar and on one side of the adjustment plate.

[0016] It can be understood that the utility model limits the movement of the adjustment plate by setting the limiting slide rod, and drives the adjustment plate to move and reset by setting the reset spring.

[0017] Preferably, a handle is fixedly connected to the outer side of the filter plate, and a push block is fixedly connected to one side of the adjustment plate.

[0018] It can be understood that, in the present invention, the adjusting plate is driven to move by the push block.

[0019] Preferably, a rectangular protective frame is equidistantly fixedly connected to the outer side of the fixing frame.

[0020] It can be understood that the utility model protects the push block by setting a rectangular protection frame to prevent accidental collision.

[0021] The beneficial effects achieved by the utility model are as follows: by arranging the first air duct, the guide groove, the second air duct, the drive motor, the rotating shaft and the fan blades, the function of attracting and discharging the vortex formed at the rear of the cab is achieved, thereby reducing the gathering of the vortex between the cab and the cargo compartment, thereby reducing the aerodynamic resistance of the truck during high-speed driving; by arranging the push block, the adjustment plate, the return spring, the card block, the card groove and the filter plate, the function of dust prevention in the process of drag reduction is achieved, and the filter plate can be quickly disassembled, cleaned and replaced, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is an enlarged view of the local A of the utility model;

[0025] Figure 3 It is an enlarged view of local B of the utility model.

[0026] In the figure: 1. cargo compartment; 2. first air duct; 3. fixing frame; 4. fixing plate; 5. driving motor; 6. second air duct; 7. rotating shaft; 8. fan blades; 9. filter plate; 10. card slot; 11. push block; 12. rectangular protective frame; 13. storage slot; 14. limit slide bar; 15. reset spring; 16. adjustment plate; 17. card block; 18. guide groove. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figures 1 to 3 , the utility model provides a technical solution:

[0029] An active drag reduction device for a box-type semi-trailer comprises a cargo compartment 1, a fixing frame 3 is fixedly connected to one side of the cargo compartment 1, a second air duct 6 is equidistantly provided inside the fixing frame 3, a fixing plate 4 is installed on the inner wall of the second air duct 6, a rotating shaft 7 is rotatably connected inside the fixing plate 4, a fan blade 8 is fixedly connected to one end of the rotating shaft 7, a first air duct 2 is equidistantly provided inside the fixing frame 3 and below the second air duct 6, a filter plate 9 is provided inside the first air duct 2 and inside the second air duct 6, an adjusting plate 16 is equidistantly slidably connected inside the fixing frame 3, a clamping block 17 is equidistantly fixedly connected to the top of the adjusting plate 16, and a clamping groove 10 used in conjunction with the clamping block 17 is equidistantly provided on the bottom of the filter plate 9.

[0030] It can be understood that the utility model facilitates the discharge of the vortex formed at the rear of the cab through the provision of the second air duct 6, and the rotation of the rotating shaft 7 drives the fan blades 8 to rotate, thereby assisting in the discharge of the vortex formed at the rear of the cab. The provision of the first air duct 2 can discharge more vortices, and the provision of the filter plate 9 can filter the air when it enters the air. The movement of the adjusting plate 16 drives the block 17 to move, so that the block 17 moves into the interior of the card slot 10, thereby limiting and fixing the position of the filter plate 9.

[0031] Furthermore, guide grooves 18 are equidistantly provided inside the fixing frame 3 , and the first air duct 2 is connected to the second air duct 6 via the guide grooves 18 .

[0032] It can be understood that, in the present invention, the provision of the guide groove 18 facilitates more eddies to enter the interior of the second air duct 6 and facilitates the discharge of the eddies.

[0033] Furthermore, a driving motor 5 is fixedly connected to one side of the fixing plate 4 , and an output end of the driving motor 5 is fixedly connected to the rotating shaft 7 .

[0034] It can be understood that, in the present invention, the driving motor 5 drives the rotating shaft 7 to rotate.

[0035] Furthermore, receiving grooves 13 are equidistantly provided inside the fixing frame 3 , and the adjusting plate 16 is slidably connected to the receiving grooves 13 .

[0036] It can be understood that the utility model limits the movement of the adjustment plate 16 by setting the receiving groove 13 .

[0037] Furthermore, a limiting slide bar 14 is fixedly connected to the interior of the storage groove 13 , and the adjustment plate 16 is slidably connected to the limiting slide bar 14 . A return spring 15 is sleeved on the outer side of the limiting slide bar 14 and on one side of the adjustment plate 16 .

[0038] It can be understood that, in the present invention, the movement of the adjustment plate 16 is limited by the setting of the limiting slide bar 14 , and the adjustment plate 16 is driven to move and reset by the setting of the reset spring 15 .

[0039] Furthermore, a handle is fixedly connected to the outer side of the filter plate 9 , and a push block 11 is fixedly connected to one side of the adjustment plate 16 .

[0040] It can be understood that, in the present invention, the push block 11 drives the adjustment plate 16 to move.

[0041] Furthermore, a rectangular protective frame 12 is equidistantly fixedly connected to the outer side of the fixing frame 3 .

[0042] It is understandable that the utility model protects the push block 11 by providing the rectangular protection frame 12 to prevent accidental collision.

[0043] Specifically, when in use, the drive motor 5 is started, and the drive motor 5 drives the rotating shaft 7 to rotate, and the rotation of the rotating shaft 7 drives the fan blades 8 to rotate, so that the vortex formed at the rear of the cab flows into the second air duct 6 and is discharged through the second air duct 6, thereby reducing the vortex gathering between the cab and the cargo compartment 1, thereby reducing the aerodynamic resistance of the truck during high-speed driving. The setting of the filter plate 9 can play a dust protection function in the process of air intake. When the filter plate 9 needs to be disassembled and cleaned, the push block 11 is pushed, and the push block 11 drives the adjustment plate 16 to slide along the limit slide rod 14. The adjusting plate 16 drives the card block 17 to move out of the card slot 10, and the filter plate 9 can be taken out for cleaning. When reinstalling after cleaning, the filter plate 9 is pushed into the fixing frame 3. During the pushing process, the filter plate 9 will squeeze the card block 17, so that the card block 17 drives the adjusting plate 16 to slide, and the reset spring 15 is compressed. When the filter plate 9 completely enters the interior of the fixing frame 3, the reset spring 15 drives the adjusting plate 16 to move and reset due to the elastic force. The adjusting plate 16 moves into the interior of the card slot 10 with the card block 17, thereby limiting and fixing the position of the filter plate 9, completing the installation, and facilitating use.

[0044] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0046] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0047] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An active drag reduction device for a box-type semitrailer, comprising a cargo box (1), characterized in that: A fixing frame (3) is fixedly connected to one side of the cargo compartment (1), a second air duct (6) is equidistantly provided inside the fixing frame (3), a fixing plate (4) is installed on the inner wall of the second air duct (6), a rotating shaft (7) is rotatably connected inside the fixing plate (4), a fan blade (8) is fixedly connected to one end of the rotating shaft (7), a first air duct (2) is equidistantly provided inside the fixing frame (3) and below the second air duct (6), a filter plate (9) is provided inside the first air duct (2) and inside the second air duct (6), an adjusting plate (16) is equidistantly slidably connected inside the fixing frame (3), a clamping block (17) is equidistantly fixedly connected to the top of the adjusting plate (16), and a clamping groove (10) for use with the clamping block (17) is equidistantly provided at the bottom of the filter plate (9).

2. The active drag reduction device for a box-type semitrailer according to claim 1, characterized in that: The interior of the fixing frame (3) is provided with flow guide grooves (18) at equal intervals, and the first air duct (2) is connected to the second air duct (6) via the flow guide grooves (18).

3. The active drag reduction device for a van-type semitrailer according to claim 1, characterized in that: A drive motor (5) is fixedly connected to one side of the fixed plate (4), and an output end of the drive motor (5) is fixedly connected to a rotating shaft (7).

4. The active drag reduction device for a box-type semitrailer according to claim 1, characterized in that: The interior of the fixing frame (3) is provided with storage grooves (13) at equal intervals, and the adjustment plate (16) is slidably connected to the storage grooves (13).

5. The active drag reduction device for a box-type semitrailer according to claim 4, characterized in that: The interior of the storage groove (13) is fixedly connected to a limit slide bar (14), the adjustment plate (16) is slidably connected to the limit slide bar (14), and a return spring (15) is sleeved on the outer side of the limit slide bar (14) and on one side of the adjustment plate (16).

6. The active drag reduction device for a box-type semitrailer according to claim 1, characterized in that: A handle is fixedly connected to the outer side of the filter plate (9), and a push block (11) is fixedly connected to one side of the adjustment plate (16).

7. The active drag reduction device for a van-type semitrailer according to claim 1, characterized in that: A rectangular protective frame (12) is fixedly connected to the outer side of the fixing frame (3) at equal distances.

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