Vehicle tail spoiler and vehicle

Abstract

The application relates to a vehicle tail flow guiding device which comprises a tail plate, a plurality of flow guiding mechanisms and an airflow response mechanism. The plurality of flow guiding mechanisms are arranged on both sides or the periphery of the tail plate. The flow guiding mechanism comprises a flow guiding plate and a traction assembly. One end of the traction assembly is connected with the flow guiding plate, and the other end is connected with the tail plate. The traction assembly drives the flow guiding plate to rotate to adjust the rotation angle between the flow guiding plate and the tail plate. The airflow response mechanism is connected with the flow guiding plate. The airflow response mechanism has a first flow guiding area and a second flow guiding area. The first flow guiding area is close to the flow guiding plate, and the second flow guiding area is away from the flow guiding plate. When the airflow flows through the airflow response mechanism, the pressure of the first flow guiding area is smaller than that of the second flow guiding area to form a driving force to drive the flow guiding plate to rotate. When the vehicle stops, the traction assembly drives the flow guiding plate to rotate to make the flow guiding plate rotate and adhere to the tail plate, so that the plurality of tail plates are folded on the tail plate to reduce the occupied space of the flow guiding mechanism and facilitate storage.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to rear-end deflectors and vehicles. Background Technology

[0002] Large vehicles such as tractors and cargo trucks have a great need to reduce fuel consumption. Among the measures to reduce wind resistance and save fuel, improving the rear cone of the cargo box of large vehicles has a significant effect on saving fuel.

[0003] In related technologies, the cargo box tail cone is fixed to the rear door panel of the truck bed. By increasing the length of the rear of the truck bed, the airflow at the rear of the truck bed is shifted backward, preventing it from accumulating at the rear and thus reducing the truck's rolling resistance. However, after installation, the cargo box tail cone is large and inconvenient to store, and the opening angle of the truck bed door panel is limited, making it difficult to meet the needs of loading and unloading operations. Summary of the Invention

[0004] Therefore, it is necessary to provide a rear-end guide device and vehicle to address the problem of large cargo box tail cone size and inconvenient storage.

[0005] An embodiment of the first aspect of this application provides a rear-end deflector, the rear-end deflector comprising:

[0006] Tailgate;

[0007] Multiple flow guiding mechanisms are disposed on both sides or around the tail plate. Each flow guiding mechanism includes a flow guiding plate and a traction assembly. The flow guiding plate is rotatably connected to the side of the tail plate. One end of the traction assembly is connected to the flow guiding plate, and the other end is connected to the tail plate. The traction assembly pulls the flow guiding plate to rotate, thereby adjusting the rotation angle between the flow guiding plate and the tail plate.

[0008] An airflow response mechanism is connected to the guide plate. The airflow response mechanism has a first guide area and a second guide area. The first guide area is close to the guide plate, and the second guide area is far from the guide plate. When airflow flows through the airflow response mechanism, the pressure in the first guide area is less than the pressure in the second guide area, which forms a driving force to drive the guide plate to rotate.

[0009] In one embodiment, the traction component includes:

[0010] A drive unit, which is connected to the tail plate;

[0011] A flexible line, one end of which is connected to the drive unit and the other end of which is connected to the guide plate. The drive unit rotates to adjust the traction length of the flexible line, thereby adjusting the angle between the guide plate and the tail plate.

[0012] In one embodiment, the traction assembly includes a guide member connected to the tail plate or the deflector plate, the guide member being used for the flexible line to pass through.

[0013] In one embodiment, the traction assembly further includes a fixing member connected to the guide plate and positioned away from the rotation axis of the guide plate, the fixing member being used to fix the end of the flexible line.

[0014] In one embodiment, the rear airflow guide device includes side airflow guide mechanisms disposed on both sides of the tailgate, the side airflow guide mechanism including airflow guide side plates, the angle between the airflow guide side plates and the tailgate being an acute angle.

[0015] In one embodiment, in the side guide mechanism, the fixing member is connected to the side guide plate and the fixing member is away from the rotation axis of the guide plate, and the guide member is connected to the tail plate and the guide member is close to the rotation axis of the guide plate.

[0016] In one embodiment, the rear airflow guide device includes a top airflow guide mechanism disposed on top of the tailgate, the top airflow guide mechanism including a top airflow guide plate, the angle between the top airflow guide plate and the tailgate being an acute angle.

[0017] In one embodiment, in the top guide mechanism, the fixing member is connected to the top guide plate, the guide member is connected to the side guide plate, and multiple guide members are arranged along the rotation axis of the guide plate, with the guide members being away from the rotation axis of the side guide plate.

[0018] In one embodiment, the airflow response mechanism includes a differential pressure plate connected to the guide plate;

[0019] There is a gap between the surfaces of the differential pressure plate and the guide plate to form the first guide zone. The second guide zone and the first guide zone are located on both sides of the differential pressure plate. The guide path length of the first guide zone is less than the guide path length of the second guide zone.

[0020] In one embodiment, the surface of the differential pressure plate facing the first flow guide region is configured as a plane, and the surface of the differential pressure plate facing the second flow guide region is configured as a curved surface.

[0021] In one embodiment, the differential pressure plate is arranged along the rotation axis of the guide plate, and the two ends of the differential pressure plate extend to the two ends of the guide plate, respectively.

[0022] The vehicle provided in the second aspect of this application includes a connected carriage and the aforementioned rear deflector.

[0023] The aforementioned rear-end airflow deflector and vehicle, by incorporating a tailgate, multiple airflow deflecting mechanisms, and an airflow response mechanism, utilizes a tailgate, multiple airflow deflecting mechanisms, and a traction assembly. As the vehicle travels, its speed gradually increases, and the airflow velocity along the front-to-back direction gradually increases. The difference in airflow velocity between the first and second airflow deflecting zones gradually increases, leading to a greater pressure difference between the two zones. This, in turn, causes the airflow response mechanism to respond to the increasing driving force of the gas flow velocity on the airflow deflector, driving the deflector to rotate away from the tailgate and into an open state. At this time, the traction assembly can traction the deflector, preventing it from excessively opening or swaying. It can also adjust the deflector to different deflecting angles according to different airflow requirements. When the vehicle stops or its speed decreases to idle, the driving force of the airflow response mechanism on the deflector is insufficient to support it. The traction component pulls the deflector to rotate, which allows the deflector to rotate and fit against the tail plate, so that multiple tail plates can be gathered on the tail plate, thereby reducing the space occupied by the deflector mechanism and making it easy to store. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the rear-end guide device according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the airflow direction on both sides of the airflow response mechanism in an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the side guide mechanism according to an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the top guide mechanism in an embodiment of this application.

[0028] Figure 5 This is a schematic diagram showing the position of the rear-end guide device and the vehicle body in an embodiment of this application.

[0029] In the picture:

[0030] 1. Tailgate;

[0031] 2. Airflow guiding mechanism; 2a. Side airflow guiding mechanism; 2b. Top airflow guiding mechanism;

[0032] 21. Flow deflector; 21a. Flow deflector side plate; 21b. Flow deflector top plate; 211. Reinforcing rib;

[0033] 22. Traction assembly; 221. Drive component; 222. Flexible line; 223. Guide component; 224. Fixing component;

[0034] 3. Airflow response mechanism; 31. First guide zone; 32. Second guide zone; 33. Differential pressure plate.

[0035] 4. Train carriage. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] See Figure 1-2 An embodiment of this application provides a rear-end airflow guiding device, including a tailgate 1, multiple airflow guiding mechanisms 2, and an airflow response mechanism 3. The multiple airflow guiding mechanisms 2 are disposed on both sides or around the tailgate 1 to guide the airflow around the tailgate 1. Each airflow guiding mechanism 2 includes a guide plate 21 and a traction assembly 22. The guide plate 21 is rotatably connected to the side of the tailgate 1. One end of the traction assembly 22 is connected to the guide plate 21, and the other end is connected to the tailgate 1. The traction assembly 22 pulls the guide plate 21 to rotate, thereby adjusting the rotation angle between the guide plate 21 and the tailgate 1, thus changing the angle between the guide plate 21 and the airflow direction, and guiding the airflow at the rear of the vehicle at different angles.

[0043] The airflow response mechanism 3 is connected to the guide plate 21. The airflow response mechanism 3 has a first guide area 31 and a second guide area 32. The first guide area 31 is close to the guide plate 21, and the second guide area 32 is far away from the guide plate 21. When the airflow flows through the airflow response mechanism 3, the pressure of the first guide area 31 is less than the pressure of the second guide area 32, which forms a driving force. The driving force can drive the guide plate 21 to rotate.

[0044] With this configuration, as the vehicle moves, its speed gradually increases, and the airflow velocity along the front-to-back direction gradually increases. The difference between the airflow velocity in the first guide zone 31 and the second guide zone 32 gradually increases, causing a gradual increase in the pressure difference between the first and second guide zones 31. This, in turn, causes the airflow response mechanism 3 to gradually increase the driving force on the guide plate 21 in response to the gas flow velocity, driving the guide plate 21 to rotate away from the tail plate 1 and into an open state. At this time, the traction component 22 can traction the guide plate 21, preventing it from opening excessively or swaying. It can also adjust the guide plate 21 to different guide angles according to different guide requirements. When the vehicle stops or the vehicle speed is reduced to idle, the driving force of the airflow response mechanism 3 on the guide plate 21 is insufficient to support the guide plate 21. The traction component 22 pulls the guide plate 21 to rotate, so that the guide plate 21 can rotate and fit against the tail plate 1, so that multiple tail plates 1 can be gathered on the tail plate 1, thereby reducing the space occupied by the airflow mechanism 2 and making it easy to store.

[0045] See Figure 1-2 In some embodiments, the traction assembly 22 includes a drive member 221 and a flexible line 222. The drive member 221 is connected to the tail plate 1. One end of the flexible line 222 is connected to the drive member 221, and the other end is connected to the guide plate 21. The drive member 221 rotates to adjust the traction length of the flexible line 222, thereby adjusting the angle between the guide plate 21 and the tail plate 1. With this configuration, the end of the flexible line 222 is wound around the drive end of the drive member 221. When the drive member 221 rotates in the forward direction, the flexible line 222 can be released, increasing the traction length of the flexible line 222 and thus increasing the rotation angle between the guide plate 21 and the tail plate 1. Of course, the drive member 221 can also rotate in the reverse direction to retract the flexible line 222, reducing the traction length of the flexible line 222 and thus reducing the rotation angle between the guide plate 21 and the tail plate 1. Furthermore, the design of the flexible line 222 reduces the space occupied by the traction component 22. After the flow guiding mechanism 2 is retracted, the flow guiding plate 21 can fit more closely with the tail plate 1, reducing the positional interference between the flow guiding plate 21 and the traction component 22.

[0046] In this embodiment, the flexible line 222 may be, but is not limited to, a steel cable or an elastic rope. The driving component 221 may include, but is not limited to, a motor, a rotary cylinder, or a rotary hydraulic cylinder. The guide plate 21 may be provided with reinforcing ribs 211. For example, the top guide plate 21b may have an arc-shaped rib located near the side guide plate 21a to reduce deformation of the guide plate 21 and reduce positional interference between the two.

[0047] See Figure 1-2In some embodiments, the traction assembly 22 includes a guide 223 connected to the tail plate 1 or the guide plate 21. The guide 223 is used for the flexible line 222 to pass through. The guide 223 may be, but is not limited to, a ring or perforated plate structure. The guide 223 can be arranged at different positions on the tail plate 1 or the guide plate 21 so that the flexible line 222 can be arranged in different bending patterns between the tail plate 1 or the guide plate 21, increasing the amount of flexible line 222 between the tail plate 1 and the guide plate 21. When the gas flow rate suddenly increases or decreases, the flexible line 222 can be released or retracted in time, reducing stress and making the flexible line 222 form a certain buffering effect on the guide plate 21.

[0048] See Figure 1-2 In some embodiments, the traction assembly 22 further includes a fixing member 224, which is connected to the guide plate 21. The fixing member 224 is used to fix the end of the flexible line 222. The fixing member 224 can be, but is not limited to, a ring or perforated plate structure. The flexible line 222 can be fixed by binding it to the fixing member 224, which is secure and easy to disassemble. Moreover, the fixing member 224 is located away from the rotation axis of the guide plate 21 to increase the torque of the traction force exerted by the flexible line 222 on the guide plate 21. The rotation angle of the guide plate 21 can be flexibly adjusted with a smaller traction force, which is labor-saving and flexible.

[0049] See Figure 3 In some embodiments, the rear airflow deflector includes side airflow deflector mechanisms 2a disposed on both sides of the tailgate 1. Each side airflow deflector mechanism 2a includes a side airflow deflector plate 21a, which guides the airflow from both sides of the vehicle body. The angle between the side airflow deflector plate 21a and the tailgate 1 is acute, so that the airflow passing through the side airflow deflector plate 21a gradually converges towards the rear of the vehicle. An airflow response mechanism 3 can be disposed on the outer surface of the side airflow deflector plate 21a, utilizing the airflow from the side of the vehicle for driving; it has a large driving force and a fast response speed.

[0050] In this embodiment, in the side guide mechanism 2a, the fixing member 224 is connected to the guide side plate 21a. The fixing member 224 can be away from the rotation axis of the guide side plate 21a. The guide member 223 is connected to the tail plate 1 and is close to the rotation axis of the guide side plate 21a. The driving member 221 is connected to the tail plate 1. The flexible line 222 is released from the driving end of the driving member 221, passes through the guide member 223 and is connected to the fixing member 224. The flexible line 222 is bent at the guide member 223 so that the flexible line 222 can pull the guide side plate 21a towards the guide member 223, making the guide side plate 21a easier to retract.

[0051] See Figure 4In some embodiments, the rear airflow deflector includes a top airflow deflector mechanism 2b disposed on top of the tailgate 1. The top airflow deflector mechanism 2b includes a top airflow deflector plate 21b, and the angle between the top airflow deflector plate 21b and the tailgate 1 is an acute angle, so that the airflow flowing through the top airflow deflector plate 21b gradually converges towards the rear of the vehicle. An airflow response mechanism 3 may be disposed on the top airflow deflector plate 21b, or the airflow response mechanism 3 may be disposed only on the side airflow deflector plate 21a.

[0052] In this embodiment, in the top guiding mechanism 2b, the fixing member 224 is connected to the top guiding plate 21b, and the guide member 223 is connected to the side guiding plate 21a. Multiple guide members 223 are arranged along the rotation axis of the side guiding plate 21a. After the flexible line 222 is released by the driving member 221, it passes through the guide member 223 on the side guiding plate 21a and then connects and fixes to the top guiding plate 21b. During the process of the driving member 221 retracting the flexible line 222, the flexible line 222 can jointly squeeze the side guiding plate 21a and the top guiding plate 21b. Under the double compression of the flexible line 222 of the top guiding mechanism 2b and the flexible line 222 of the side guiding mechanism 2a, the side guiding plate 21a will rotate and fit the tail plate 1 before the top guiding plate 21b. That is, the side guiding plate 21a folds up first, and the top guiding plate 21b folds up then, forming a certain folding sequence to avoid positional interference between the two. Moreover, after being folded up in this way, the top guide plate 21b is located outside the side guide plate 21a. When the airflow response mechanism 3 on the side guide plate 21a responds to the airflow and drives the side guide plate 21a to rotate, the side guide plate 21a will push the top guide plate 21b to open together, thereby improving the rotation synchronization between the side guide plate 21a and the top guide plate 21b.

[0053] The guide member 223 can be set away from the rotation axis of the guide side plate 21a. For example, the guide member 223 can be set at the rotation end of the guide side plate 21a that is opposite to the rotation position, so as to increase the applied torque, so that a small traction force can drive the guide side plate 21a to rotate, and the movement of the guide side plate 21a is agile.

[0054] See Figure 1-2 In some embodiments, the airflow response mechanism 3 includes a differential pressure plate 33 connected to a guide plate 21. A gap exists between the surfaces of the differential pressure plate 33 and the guide plate 21 to form a first guide region 31. A second guide region 32 and the first guide region 31 are respectively disposed on both sides of the differential pressure plate 33. The guide path length of the first guide region 31 is less than the guide path length of the second guide region 32, so that the airflow velocity flowing through the first guide region 31 is greater than the airflow velocity flowing through the second guide region 32, thereby causing the pressure in the first guide region 31 to be less than the pressure in the second guide region 32, thus generating a driving force.

[0055] In some embodiments, the surface of the differential pressure plate 33 facing the first guide zone 31 is configured as a plane, and the surface of the differential pressure plate 33 facing the second guide zone 32 is configured as a curved surface. The curved surface can be configured as a streamline. The curved surface is arranged vertically along the axis of rotation of the guide side plate 21a. The cross-sectional profile dimension of the curved surface is larger than the profile dimension of the plane, so that the guide path length of the first guide zone 31 is smaller than the guide path length of the second guide zone 32.

[0056] In this embodiment, the plane can be parallel to the surface of the guide plate 21 to reduce the volume of the first guide area 31 and allow the airflow to pass through quickly.

[0057] See Figure 1-2 In some embodiments, the differential pressure plate 33 is arranged along the rotation axis of the guide plate 21, and the two ends of the differential pressure plate 33 extend to the two ends of the guide plate 21, that is, the length of the differential pressure plate 33 can be equal to or slightly less than the length of the guide plate 21, so as to increase the force application area of ​​the differential pressure plate 33 on the guide plate 21, making the guide plate 21 easier to open and guide the gas.

[0058] See Figure 1-2 and Figure 5 The vehicle provided in at least one embodiment of this application includes a connected carriage and the aforementioned rear airflow deflector. By installing the rear airflow deflector on the carriage, as the vehicle travels, the vehicle speed gradually increases, and the airflow velocity along the front-to-back direction gradually increases. The difference between the airflow velocity in the first deflector zone 31 and the airflow velocity in the second deflector zone 32 gradually increases, causing the pressure difference between the first deflector zone 31 and the second deflector zone 32 to gradually increase. This, in turn, causes the airflow response mechanism 3 to respond to the increasing driving force of the gas flow velocity on the deflector plate 21, driving the deflector plate 21 to rotate away from the tail plate 1 and into an open state. At this time, the traction component 22 can traction the deflector plate 21, preventing it from opening excessively or swaying. The deflector plate 21 can also be adjusted to different deflection angles according to different deflection requirements. When the vehicle stops or the vehicle speed is reduced to idle, the driving force of the airflow response mechanism 3 on the guide plate 21 is insufficient to support the guide plate 21. The traction component 22 pulls the guide plate 21 to rotate, so that the guide plate 21 can rotate and fit against the tail plate 1, so that multiple tail plates 1 can be gathered on the tail plate 1, thereby reducing the space occupied by the airflow mechanism 2 and making it easy to store.

[0059] In some embodiments, the doors on the vehicle body are designed as double doors, that is, the vehicle body includes two door panels, and the guide top plate 21b can be designed as two, with each guide top plate 21b correspondingly set on one door panel. When the vehicle stops, the guide top plate 21b and the guide side plate 21a connected to the door panel can be folded together on the same door panel to reduce the interference of movement position between the rear guide device and the door panel.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A rear spoiler, characterized in that The vehicle tail flow guiding device comprises: a tail plate (1); a plurality of flow guiding mechanisms (2) arranged on both sides or periphery of the tail plate (1), each of the flow guiding mechanisms (2) comprising a flow guiding plate (21) and a traction assembly (22), the flow guiding plate (21) being rotatably connected to a side of the tail plate (1), the traction assembly (22) being connected to one end of the flow guiding plate (21) and to the other end of the tail plate (1), the traction assembly (22) being configured to rotate the flow guiding plate (21) to adjust the rotation angle between the flow guiding plate (21) and the tail plate (1); an airflow response mechanism (3) connected to the flow guiding plate (21), the airflow response mechanism (3) having a first flow guiding area (31) close to the flow guiding plate (21) and a second flow guiding area (32) away from the flow guiding plate (21), when airflow flows through the airflow response mechanism (3), the pressure of the first flow guiding area (31) is less than that of the second flow guiding area (32) to form a driving force to drive the flow guiding plate (21) to rotate, the airflow response mechanism (3) comprising a differential pressure plate (33) connected to the flow guiding plate (21), the differential pressure plate (33) and the surface of the flow guiding plate (21) having a spacing to form the first flow guiding area (31), the second flow guiding area (32) and the first flow guiding area (31) being arranged on both sides of the differential pressure plate (33), the flow guiding path length of the first flow guiding area (31) being less than that of the second flow guiding area (32), the surface of the differential pressure plate (33) facing the first flow guiding area (31) being configured as a plane, and the surface of the differential pressure plate (33) facing the second flow guiding area (32) being configured as a curved surface; wherein the plurality of flow guiding mechanisms (2) comprises a top flow guiding mechanism (2b) arranged on the top of the tail plate (1), the top flow guiding mechanism (2b) comprising a flow guiding top plate (21b), the angle between the flow guiding top plate (21b) and the tail plate (1) being an acute angle, so that the airflow flowing through the flow guiding top plate (21b) gradually converges towards the rear of the vehicle tail; the plurality of flow guiding mechanisms (2) comprises a side flow guiding mechanism (2a) arranged on both sides of the tail plate (1), the side flow guiding mechanism (2a) comprising a flow guiding side plate (21a), the flow guiding side plate (21a) being capable of guiding the airflow on both sides of the vehicle body, the angle between the flow guiding side plate (21a) and the tail plate (1) being an acute angle, so that the airflow flowing through the flow guiding side plate (21a) gradually converges towards the rear of the vehicle tail. The traction assembly (22) comprises a flexible line (222) for traction of the guide top plate (21b), the flexible line (222) is connected to the guide top plate (21b) and passes through a guide (223) arranged on the guide side plate (21a) and is connected to a driving member (221) arranged on the tail plate (1), the flexible line (222) first tractions the guide side plate (21a) to fold, and then tractions the guide top plate (21b) to fold, realizing phased and orderly folding actions and avoiding structural interference, and the folded guide top plate (21b) can be pushed by the guide side plate (21a) to be opened together, realizing non-interference linkage.

2. The vehicle tail flow guide of claim 1, wherein The traction assembly (22) comprises: a driving member (221) connected to the tail plate (1); one end of the flexible line (222) is connected to the driving member (221), and the other end is connected to the guide plate (21), and the driving member (221) rotates to adjust the traction length of the flexible line (222) to adjust the included angle between the guide plate (21) and the tail plate (1).

3. The vehicle tail flow guide of claim 2, wherein, The traction assembly (22) comprises a guide (223) connected to the tail plate (1) or the guide plate (21), and the guide (223) is used for passing the flexible line (222).

4. The vehicle tail flow guide of claim 3, wherein The traction assembly (22) further comprises a fixing member (224) connected to the guide plate (21), and the fixing member (224) is arranged at a position away from the rotation axis of the guide plate (21), and the fixing member (224) is used for fixing the end of the flexible line (222).

5. The vehicle tail flow guide of claim 4, wherein, In the side guide mechanism (2a), the fixing member (224) is connected to the guide plate (21) of the side, and the fixing member (224) is away from the rotation axis of the guide plate (21), the guide (223) is connected to the tail plate (1), and the guide (223) is close to the rotation axis of the guide plate (21).

6. The vehicle tail flow guide of claim 5, wherein, In the top guide mechanism (2b), the fixing member (224) is connected to the guide top plate (21b), the guide (223) is connected to the guide side plate (21a), the guide (223) is arranged in the direction of the rotation axis of the guide plate (21), and the guide (223) is away from the rotation axis of the guide side plate (21a).

7. The vehicle tail flow guide of claim 1, wherein The differential pressure plate (33) is arranged in the direction of the rotation axis of the guide plate (21), and both ends of the differential pressure plate (33) extend to both ends of the guide plate (21).

8. A vehicle comprising a vehicle cabin and the tail guide device according to any one of claims 1-7.

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