Flow guiding and resistance reducing device for tail of van
By optimizing the angle and shape of the rear air deflector of the van through a segmented deflector design and folding mechanism, the problem of poor airflow guidance effect is solved, and more efficient airflow guidance and drag reduction effect are achieved.
Patent Information
- Application Number
- CN202520616832.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2035-04-03
AI Technical Summary
The fixed shape of the rear air deflector on existing vanes results in poor airflow guidance, especially in the upper, middle and lower parts of the van body, making it impractical.
It adopts a segmented guide plate design, including a top plate, a middle plate and a bottom plate. The angle can be adjusted at different positions through a folding mechanism. Combined with micro-curved surface and arc groove structure, it optimizes airflow guidance.
It significantly improves the airflow guidance and drag reduction effect of the deflector, reduces vortex formation, lowers air resistance, and improves vehicle driving efficiency.
Smart Images
Figure CN223812644U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a flow guiding and resistance reducing device technical field especially relates to a van tail flow guiding and resistance reducing device. BACKGROUND
[0002] The van tail flow guiding and resistance reducing device is a kind of equipment for optimizing the aerodynamic performance of vehicle, reducing air resistance, which is widely used in logistics transportation and other fields, and the flow guiding device is installed at the tail of van, for optimizing airflow distribution, reducing the formation of vortex at the tail, thereby reducing air resistance and reducing the fuel consumption of van driving.
[0003] The van tail flow guiding and resistance reducing device is usually folded and installed at the tail of van, and the flow guiding plate is unfolded and used before the van driving, but the surface shape of the flow guiding plate is fixed, so that the angle of the flow guiding plate with the upper, middle and lower positions of the van compartment is uniform when unfolded at the back side of the van compartment, and the air at different positions of the van compartment cannot be guided well, and the flow guiding effect of the top part and the bottom part is poor due to the influence of high speed, ground effect and wheels, resulting in the problem of low practicability of the flow guiding and resistance reducing device when used. SUMMARY
[0004] The utility model discloses a van tail flow guiding and resistance reducing device to solve the problem of the fixed surface shape of the flow guiding plate, which makes the angle of the flow guiding plate with the upper, middle and lower positions of the van compartment uniform when unfolded at the back side of the van compartment, and the air at different positions of the van compartment cannot be guided well, and the flow guiding effect of the top part and the bottom part is poor due to the influence of high speed, ground effect and wheels, resulting in the problem of low practicability of the flow guiding and resistance reducing device when used.
[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme: a van tail flow guiding and resistance reducing device, comprising a frame rod and a flow guiding plate, characterized in that: one side of the frame rod is provided with a van compartment, and the frame rod is fixed on one side of the van compartment by bolts for installing the whole device, and the flow guiding plate is installed on the outer surface of the frame rod by a shaft rod, and the flow guiding plate can rotate an angle on one side of the frame rod by the shaft rod by pushing the flow guiding plate, and one side of the frame rod is provided with a folding mechanism capable of fixing the angle between the flow guiding plate and the frame rod.
[0006] The above-mentioned components achieve the following effects: when installing the flow guiding and resistance reducing device, the one side of the frame rod is attached to the back side of the van compartment, and the frame rod is fixed on the back side of the van compartment by bolts to install the flow guiding plate and the folding mechanism.
[0007] Preferably, the flow guiding plate is composed of a top plate, a middle layer plate and a bottom plate, the angle deviation between the top plate and the middle layer plate is about 10°, and the angle deviation between the middle layer plate and the bottom plate is about 10°.
[0008] The effect achieved by the above component is that: by setting the deflector plate into three parts of the top plate, the middle layer plate and the bottom plate, when the deflector plate is unfolded by the folding mechanism, the angle between the top plate and the truck compartment is close to 25°-35°, which can guide the airflow to flow smoothly to the rear of the roof, the angle between the middle layer plate and the truck compartment is close to 15°-25°, which can balance the pressure gradient and suppress the lateral vortex, and the angle between the bottom plate and the truck compartment is close to 5°-15°, which can weaken the vortex suction effect of the truck bottom, so that the deflector plate has different deflection effects at different positions of the truck compartment after unfolding, and the deflection and drag reduction effect of the deflector plate is greatly improved.
[0009] Preferably, the outer side of the surface of the top plate is a micro-curved surface, and the bottom end edge of the top plate is slightly upturned.
[0010] The effect achieved by the above component is that: by setting the top plate as a micro-curved surface and the bottom end edge slightly upturned, the airflow can be prevented from separating too early, and when the airflow passes through the top plate, the high-speed airflow is guided to the rear of the roof, reducing the low-pressure area at the top.
[0011] Preferably, the outer surface of the middle layer plate is an asymmetric curved surface, and the curvature of the inner side close to the truck compartment is greater than the curvature of the outer side away from the truck compartment.
[0012] The effect achieved by the above component is that: by setting the outer surface of the middle layer plate as an asymmetric curved surface, the airflow separation can be delayed, and the middle flow field and the upper deflection form a continuous transition.
[0013] Preferably, one side of the bottom plate is provided with a plurality of arc-shaped grooves, and the arc-shaped grooves are linearly distributed on one side of the bottom plate.
[0014] The effect achieved by the above component is that: by setting a plurality of arc-shaped grooves on the surface of the bottom plate, the airflow entering the surface of the bottom plate can be guided to diffuse close to the ground, cooperating with the ground effect to reduce the rolling strength of the airflow at the bottom of the truck.
[0015] Preferably, the inner wall of the arc-shaped groove is arc-shaped at both side edges.
[0016] The effect achieved by the above component is that: by setting the inner wall of the arc-shaped groove as arc-shaped at both side edges, the airflow can enter the groove more smoothly.
[0017] Preferably, the folding mechanism comprises a first slot rod, one end of the first slot rod is rotationally connected with one end of the frame rod, a first sliding block is slidingly connected with the inner wall of the first slot rod, a connecting rod is fixedly connected with one end of the first sliding block, a screw rod is threadedly connected with one end of the inner wall of the first sliding block, a plurality of positioning holes are formed on the outer surface of the first slot rod, a second slot rod is fixedly connected with one side of the deflector plate, a second sliding block is slidingly connected with the inner wall of the second slot rod, and one end of the second sliding block is rotationally connected with the end of the connecting rod away from the first sliding block.
[0018] The effects achieved by the above components are that: when the flow guiding and resistance reducing device is used, the first slot rod is rotated at one end of the frame rod in a direction away from the frame rod, the first slider at one end of the connecting rod is slid outward on the inner wall of the first slot rod, the second slider at the other end of the connecting rod is slid outward on the inner wall of the second slot rod, the connecting rod is rotated at one end of the second slider, the connecting rod, the first slot rod and the frame rod and the flow guiding plate form a triangle, then the screw rod at one end of the first slider is rotated to move the screw rod on the inner wall of the first slider and insert the screw rod into the positioning hole on the outer surface of the first slot rod, the position of the first slider in the first slot rod and the angle between the connecting rod and the flow guiding plate are fixed, when the flow guiding plate is folded, the screw rod is rotated to make one end of the screw rod out of the positioning hole, the flow guiding plate is pushed to rotate towards the truck compartment, the second slider is slid inward on the inner wall of the second slot rod, the connecting rod is slid inward on the first slot rod and one end of the connecting rod is rotated at one side of the second slider, the first slot rod is as close as possible to one side of the frame rod and the flow guiding plate is as close as possible to one side of the first slot rod, then the screw rod on the outer surface of the first slider is rotated to insert one end of the screw rod into the positioning hole, the position of the flow guiding plate is fixed.
[0019] Preferably, one end of the screw rod is fixedly connected with an operating block, and opposite protrusions are arranged on the outer surface of the operating block.
[0020] The effects achieved by the above components are that: the operating block can be more conveniently rotated by holding the two opposite protrusions on the outer surface of the operating block.
[0021] Compared with the prior art, the advantages and positive effects of the utility model are that:
[0022] In the utility model, the flow guiding plate is divided into three parts, the angles between different positions of the flow guiding plate and the truck compartment are different when the flow guiding plate is unfolded through the folding mechanism, the flow guiding effect on different positions of the truck compartment after the flow guiding plate is unfolded is different, and the flow guiding and resistance reducing effect of the flow guiding plate is greatly improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] The utility model will be further described below in combination with the drawings and embodiments.
[0024] Figure 1 It is a three-dimensional structure schematic view of the utility model;
[0025] Figure 2 It is a three-dimensional structure schematic view of the utility model plate body;
[0026] Figure 3 It is a three-dimensional structure schematic view of the utility model first slot rod;
[0027] Figure 4 It is a three-dimensional structure schematic view of the utility modelFigure 3 A magnified three-dimensional structural diagram of point A.
[0028] Legend: 1. Frame rod; 2. Folding mechanism; 21. First groove rod; 22. First slider; 23. Positioning hole; 24. Screw; 25. Connecting rod; 26. Second slider; 27. Second groove rod; 28. Operating block; 3. Guide plate; 31. Top plate; 32. Middle plate; 33. Bottom plate; 34. Arc-shaped groove; 4. Cargo compartment. Detailed Implementation
[0029] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] Example 1, such as Figures 1-2 As shown, a rear-end flow guiding and drag reduction device for a van includes a frame rod 1 and a flow guide plate 3. A van body 4 is provided on one side of the frame rod 1. The frame rod 1 is fixed to one side of the van body 4 with bolts for mounting the entire device. The flow guide plate 3 is mounted on the outer surface of the frame rod 1 via a shaft. Pushing the flow guide plate 3 can cause the flow guide plate 3 to rotate at an angle on one side of the frame rod 1 via the shaft. A folding mechanism 2 is provided on one side of the frame rod 1 to fix the angle between the flow guide plate 3 and the frame rod 1. When installing the flow guiding and drag reduction device, one side of the frame rod 1 is attached to the back side of the van body 4, and the frame rod is fixed to the back side of the van body 4 with bolts to install the flow guide plate 3 and the folding mechanism 2.
[0032] Reference Figures 1-3As shown, the embodiment discloses that the deflector 3 is composed of a top plate 31, a middle layer plate 32 and a bottom plate 33, the angle deviation between the top plate 31 and the middle layer plate 32 is about 10°, and the angle deviation between the middle layer plate 32 and the bottom plate 33 is about 10°. By setting the deflector 3 as three parts of the top plate 31, the middle layer plate 32 and the bottom plate 33, when the deflector 3 is unfolded by the folding mechanism 2, the angle between the top plate 31 and the truck compartment 4 is close to 25°-35°, which can guide the airflow to flow smoothly to the rear of the roof, the angle between the middle layer plate 32 and the truck compartment 4 is close to 15°-25°, which can balance the pressure gradient and suppress the lateral vortex, and the angle between the bottom plate 33 and the truck compartment 4 is close to 5°-15°, which can weaken the vortex suction effect of the truck bottom, so that the deflector 3 has different deflection effects on different positions of the truck compartment 4 after unfolding, and the deflection and resistance reduction effects of the deflector 3 are greatly improved.
[0033] Referring to Figures 1-3 As shown, the embodiment discloses that the outer side of the surface of the top plate 31 is a micro-curved surface, and the bottom end edge of the top plate 31 is slightly upturned. By setting the top plate 31 as a micro-curved surface and slightly upturned at the bottom end edge, early airflow separation can be avoided, and when the airflow passes through the top plate 31, the high-speed airflow is guided to the rear of the roof, and the top low-pressure area is reduced. The outer surface shape of the middle layer plate 32 is an asymmetric curved surface, and the curvature of the inner side close to the truck compartment 4 is greater than the curvature of the outer side away from the truck compartment 4. By setting the outer surface shape of the middle layer plate 32 as an asymmetric curved surface, airflow separation can be delayed, and the middle flow field and the upper deflection form a continuous transition. The bottom plate 33 is provided with a plurality of arc-shaped grooves 34 on one side, and the arc-shaped grooves 34 are linearly distributed on one side of the bottom plate 33. By setting a plurality of arc-shaped grooves 34 on the surface of the bottom plate 33, the airflow entering the surface of the bottom plate 33 can be guided to diffuse close to the ground, cooperating with the ground effect to reduce the rolling strength of the truck bottom airflow. The inner wall of the arc-shaped groove 34 is arc-shaped at the two side edges. By setting the inner wall of the arc-shaped groove 34 as arc-shaped at the two side edges, the airflow can enter the groove more smoothly.
[0034] Referring to Figures 1-4As shown, the folding mechanism 2 comprises a first slot rod 21, one end of the first slot rod 21 is rotatably connected with one end of the frame rod 1, the inner wall of the first slot rod 21 is slidably connected with a first sliding block 22, one end of the first sliding block 22 is fixedly connected with a connecting rod 25, the inner wall of the first sliding block 22 is threadedly connected with a screw rod 24, the outer surface of the first slot rod 21 is provided with a plurality of positioning holes 23, one side of the flow guide plate 3 is fixedly connected with a second slot rod 27, the inner wall of the second slot rod 27 is slidably connected with a second sliding block 26, one end of the second sliding block 26 is rotatably connected with the end of the connecting rod 25 away from the first sliding block 22, by setting the folding mechanism 2, when the flow guide plate 3 is pushed to rotate outward at one side of the frame rod 1, the first slot rod 21 will rotate away from the frame rod 1 at one end of the frame rod 1, the first sliding block 22 at one end of the connecting rod 25 will slide outward on the inner wall of the first slot rod 21, the second sliding block 26 at the other end of the connecting rod 25 will slide outward on the inner wall of the second slot rod 27, at the same time, the connecting rod 25 will rotate at one end of the second sliding block 26, so that the connecting rod 25, the first slot rod 21, the frame rod 1 and the flow guide plate 3 form a triangle, then rotate the screw rod 24 at one end of the first sliding block 22 to move the screw rod 24 on the inner wall of the first sliding block 22 and insert one end into the inside of the positioning hole 23 on the outer surface of the first slot rod 21, so that the position of the first sliding block 22 in the first slot rod 21 and the angle between the connecting rod 25 and the flow guide plate 3 can be fixed, when folding the flow guide plate 3, rotate the screw rod 24 to make one end of the screw rod 24 away from the inside of the positioning hole 23, then push the flow guide plate 3 to rotate towards the truck compartment 4, so that the second sliding block 26 slides inward on the inner wall of the second slot rod 27, the first sliding block 22 drives the connecting rod 25 to slide into the first slot rod 21 and makes one end of the connecting rod 25 rotate at one side of the second sliding block 26, so that the first slot rod 21 is as close as possible to one side of the frame rod 1 and the flow guide plate 3 is as close as possible to one side of the first slot rod 21, then rotate the screw rod 24 on the outer surface of the first sliding block 22 to insert one end of the screw rod 24 into the inside of the positioning hole 23, so as to fix the position of the flow guide plate 3.
[0035] Referring to Figures 2-4 As shown, one end of the screw rod 24 is fixedly connected with an operating block 28, the outer surface of the operating block 28 is provided with protrusions opposite to each other on both sides, holding the two protrusions opposite to each other on the outer surface of the operating block 28 can more conveniently rotate the operating block 28 to control the rotation of the screw rod 24.
[0036] The working principle is that when the flow guiding and resistance reducing device is installed, one side of the frame rod 1 is attached to the back side of the truck compartment 4, the frame rod is fixed to the back side of the truck compartment 4 through bolts, the flow guiding plate 3 and the folding mechanism 2 are installed, when the flow guiding plate 3 is used, the flow guiding plate 3 is pushed to rotate outward at one side of the frame rod 1, the first slot rod 21 rotates away from the frame rod 1 at one end of the frame rod 1, the first sliding block 22 at one end of the connecting rod 25 slides outward on the inner wall of the first slot rod 21, the second sliding block 26 at the other end of the connecting rod 25 slides outward on the inner wall of the second slot rod 27, at the same time, the connecting rod 25 rotates at one end of the second sliding block 26, so that the connecting rod 25, the first slot rod 21, the frame rod 1 and the flow guiding plate 3 form a triangle, then the screw rod 24 at one end of the first sliding block 22 is rotated to move the screw rod 24 on the inner wall of the first sliding block 22, and the screw rod 24 is inserted into the positioning hole 23 on the outer surface of the first slot rod 21, so that the position of the first sliding block 22 in the first slot rod 21 and the angle between the connecting rod 25 and the flow guiding plate 3 are fixed, the angle between the top plate 31 and the truck compartment 4 is close to 25°-35°, when the truck is running, the airflow can be smoothly guided to the back of the roof through the top plate 31, the middle plate 32 can balance the pressure gradient and suppress the lateral vortex, and the bottom plate 33 can weaken the vortex suction effect of the truck bottom and guide the airflow to reduce the running resistance of the truck.
[0037] Based on the above ideal embodiments of the present application, the related personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and must be determined according to the scope of the claims.
Claims
1. A van tail flow guiding and resistance reducing device comprising a frame pole (1) and a flow guiding plate (3), characterized in that: The frame rod (1) is provided with a truck compartment (4) on one side, and the frame rod (1) is fixed on one side of the truck compartment (4) by bolts for mounting the device as a whole, and the guide plate (3) is installed on the outer surface of the frame rod (1) through a shaft rod, and the guide plate (3) can be pushed to rotate an angle on one side of the frame rod (1) through the shaft rod, and the frame rod (1) is provided with a folding mechanism (2) on one side, which can fix the angle between the guide plate (3) and the frame rod (1).
2. A van tail flow guiding and drag reducing device according to claim 1, characterized in that: The guide plate (3) is composed of a top plate (31), a middle layer plate (32) and a bottom plate (33), the angle deviation between the top plate (31) and the middle layer plate (32) is about 10°, and the angle deviation between the middle layer plate (32) and the bottom plate (33) is about 10°.
3. A van tail flow guiding drag reducing device according to claim 2, characterized in that: The outer side of the top plate (31) is a micro-curved surface, and the bottom end edge of the top plate (31) is slightly upturned.
4. The van tail flow guiding and drag reducing device according to claim 2, characterized in that: The outer surface of the middle layer plate (32) is an asymmetric curved surface, and the curvature of the inner side close to the truck compartment (4) is greater than the curvature of the outer side away from the truck compartment (4).
5. A van tail flow guiding drag reducing device according to claim 2, characterized in that: The bottom plate (33) is provided with a plurality of arc-shaped grooves (34) on one side, and the arc-shaped grooves (34) are linearly distributed on one side of the bottom plate (33).
6. A van tail flow guiding drag reducing device according to claim 5, characterized in that: The inner wall of the arc-shaped groove (34) is arc-shaped.
7. The van tail flow reduction device of claim 1, wherein: The folding mechanism (2) comprises a first slot rod (21), one end of the first slot rod (21) is rotatably connected with one end of the frame rod (1), the inner wall of the first slot rod (21) is slidably connected with a first sliding block (22), one end of the first sliding block (22) is fixedly connected with a connecting rod (25), the inner wall of the first sliding block (22) is threadedly connected with a screw rod (24) at one end, a plurality of positioning holes (23) are formed in the outer surface of the first slot rod (21), one side of the guide plate (3) is fixedly connected with a second slot rod (27), the inner wall of the second slot rod (27) is slidably connected with a second sliding block (26), and one end of the second sliding block (26) is rotatably connected with the end of the connecting rod (25) away from the first sliding block (22).
8. A van tail flow guiding drag reducing device according to claim 7, characterized in that: One end of the screw rod (24) is fixedly connected with an operating block (28), and the outer surface of the operating block (28) is provided with protrusions opposite to each other on both sides.