Low-wind-resistance automobile model exterior trimming part

Abstract

The utility model discloses a low wind resistance automobile model exterior trimming part which comprises an automobile body, the front portion of the automobile body is round and slightly declined, flow guide grooves starting from the lower portion of a headlamp to a wheel arch are formed in the two sides of the front portion of the automobile body, and outlets and inlets are formed in the rear portions and the front portions of the two flow guide grooves. An air flow guide sheet is arranged in each flow guide groove, a plurality of uniformly distributed through holes are formed in each air flow guide sheet, each flow guide groove is of a trumpet-shaped structure, the diameter of an outlet is larger than that of an inlet, grooves are formed in the front ends of the two flow guide grooves, and vertically arranged air knives are arranged in the two grooves. Air impact on a vehicle head is reduced through the unique shape of the front portion of the vehicle body, airflow is orderly guided through the flow guide grooves and the inner airflow guide pieces to optimize the aerodynamic performance, and the through holes evenly distributed in the airflow guide pieces can reduce pressure, promote airflow exchange and assist light weight of exterior trimming parts. Therefore, the energy consumption is reduced, and the vehicle control performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive exterior parts technology, and in particular to a low-drag automotive model exterior part. Background Technology

[0002] In the development of the automotive industry, reducing wind resistance has always been one of the key directions for improving vehicle performance and energy efficiency. However, existing automotive exterior design still has many shortcomings in addressing aerodynamic challenges.

[0003] The common front-end design of automobiles makes it difficult to effectively guide airflow, easily creating significant air impact at the front and resulting in a high-pressure zone that greatly increases wind resistance. Simultaneously, during vehicle operation, turbulent airflow around the car body prevents orderly airflow guidance, leading to poor aerodynamic performance. Furthermore, traditional automotive exterior components are designed with little consideration for weight; heavier components not only increase fuel consumption but also negatively impact vehicle handling.

[0004] Therefore, we propose a low-drag exterior trim for car models. Utility Model Content

[0005] The main purpose of this utility model is to provide a low-drag car model exterior part, which can effectively solve the problems of air impact and high-pressure zone formation at the front of the car, turbulent airflow around the car body, and negative impact on car energy consumption and handling performance due to the weight of traditional exterior parts, thereby improving car performance and energy efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A low-drag car model exterior part includes a car body. The front of the car body has a rounded and slightly downward-sloping shape. The front of the car body has air guide grooves on both sides, starting from below the headlights and extending to the wheel arches. The rear and front parts of the two air guide grooves are provided with an outlet and an inlet. An airflow guide plate is provided in the air guide groove, and the airflow guide plate is provided with a plurality of evenly distributed through holes.

[0008] By adopting the above technical solutions, during vehicle operation, air resistance is generated by the vehicle body. The rounded shape of the front of the vehicle body reduces the impact of air on the front. When air comes into contact with the front of the vehicle, the rounded surface allows the air to flow more smoothly, while the slightly downward-sloping design helps guide the airflow downwards, allowing the airflow to flow along the lower surface of the vehicle body after passing the front, avoiding the formation of a high-pressure zone in front of the vehicle, thereby reducing wind resistance. This is similar to the shape of a water droplet; its rounded front end allows it to move in air or water with relatively less resistance.

[0009] When a car is moving, air enters the air intake through the air deflector. The air intake is designed to capture some of the airflow in front of the car and guide it into the air deflector. The air outlet is used to redirect the airflow that has been processed by the air deflector back to the outside of the car body, so as to avoid the airflow from generating turbulence around the car body and affecting the vehicle's aerodynamic performance.

[0010] An airflow guide vane is installed inside the airflow channel. Its main function is to guide the airflow in a specific direction within the airflow channel. The airflow guide vane can change the direction of the airflow, making it flow more orderly within the airflow channel. It can organize the relatively chaotic airflow entering from the inlet into an airflow direction that better matches the vehicle's driving direction, allowing it to flow out from the outlet more smoothly.

[0011] On the one hand, through holes can reduce air pressure when airflow passes through them. If the air pressure inside the guide channel is too high, the airflow can be released through the through holes, preventing airflow instability caused by excessive air pressure. On the other hand, through holes allow some airflow to exchange between the inside and outside of the guide channel, enabling the airflow inside and outside the guide channel to work together better, further optimizing the airflow distribution around the vehicle and reducing the overall wind resistance of the car. Finally, from the perspective of the entire car model's exterior parts, although the weight reduction of each through hole is very small, multiple through holes distributed on the airflow guide plate can accumulate to play a certain role in reducing the weight of the exterior parts. This contributes to the overall lightweight design of the car. Lighter exterior parts can reduce the car's energy consumption to a certain extent, because the drag force that the vehicle needs to overcome during driving will also be reduced accordingly. At the same time, the reduction in the weight of the exterior parts also improves the vehicle's handling performance, making the vehicle more agile during driving, steering, and other operations.

[0012] Furthermore, the guide channel has a trumpet-shaped structure, and the outlet diameter is larger than the inlet diameter.

[0013] By adopting the above technical solution, when the car is moving, air will enter the guide channel from the inlet. Due to the small diameter of the inlet, the airflow speed will increase when passing through the inlet according to Bernoulli's principle in fluid mechanics during the vehicle's forward movement. This accelerated airflow can be more effectively guided into the interior of the guide channel.

[0014] The guide channel has a funnel-shaped structure, and the internal space gradually increases from the inlet to the outlet. When the high-speed airflow enters the guide channel, the airflow speed will gradually decrease as the guide channel space gradually expands. According to Bernoulli's principle, as the speed decreases, the airflow pressure will increase.

[0015] The outlet diameter is larger than the inlet diameter, which allows the diffused airflow to flow out smoothly from the outlet at a lower speed and higher pressure. The larger outlet allows the airflow to be discharged more smoothly to a suitable position outside the vehicle body, guiding the airflow to the side or bottom of the vehicle body, thereby avoiding the formation of turbulence around the vehicle body and helping to reduce the overall wind resistance of the vehicle. This trumpet-shaped airflow channel structure optimizes the airflow distribution around the vehicle body by effectively controlling the airflow speed and pressure.

[0016] Furthermore, the front ends of the two guide channels are provided with grooves, and vertically arranged air knives are provided in both grooves.

[0017] By adopting the above technical solution, when the car is in motion, the airflow in front of the car will first come into contact with the area where the groove is located. The existence of the groove can change the original relatively direct flow path of the airflow, so as to produce a certain diversion effect. Some of the airflow will flow along the shape of the groove. This can pre-process the airflow that is about to enter the guide channel to a certain extent, making the airflow distribution more regular and orderly, and preventing a large amount of airflow from rushing into the guide channel inlet without any rules. This lays the foundation for the subsequent airflow to enter the guide channel more smoothly and be effectively guided in it.

[0018] The air knives are arranged vertically within the grooves. When airflow passes through, the air knives act like sharp blades, cutting the airflow. They can divide the originally relatively wide and chaotic airflow into multiple thinner and more regular airflow streams. For example, in industrial production, when air knives are used to dry materials on the surface of conveyor belts, the high-speed airflow from the air knives can precisely blow away the moisture. Here, the air knives play a similar precise shaping role for the airflow in front of the vehicle, making the airflow direction clearer and the velocity distribution more uniform before entering the guide channel. Through the cutting and shaping of the airflow by the air knives, the treated airflow can smoothly enter the inlet of the guide channel at a more suitable angle and state. The air knives can adjust the airflow direction to match the inlet of the guide channel, ensuring that the airflow can be efficiently captured by the guide channel and flow inside it according to a preset path. In conjunction with the guide channel and its internal airflow guide plates and other structures, the airflow distribution around the vehicle body is better optimized, ultimately reducing the vehicle's wind resistance.

[0019] Furthermore, the outlet is located near the wheel arch and is connected to the wheel arch, while the inlet is located near the groove and is connected to the groove.

[0020] By adopting the above technical solution, when the car is moving, the airflow in front of the car will first be initially diverted and regulated at the groove. As mentioned above, the groove changes the original flow path of the airflow, making it more orderly. Since the inlet is connected to the groove, the airflow that has been pre-treated by the groove can be directly and smoothly introduced into the guide channel. This connection design ensures that the airflow from the front of the car can be seamlessly connected into the guide channel without interruption of airflow or turbulence caused by poor connection, making the process of airflow entering the guide channel smoother and more efficient.

[0021] Because the inlet and the groove are closely connected, the airflow system in front of the vehicle is organized more rationally. From a macro perspective, it allows the overall airflow in the front of the vehicle to enter the guide channel in an orderly manner according to the predetermined design, laying a good foundation for the subsequent airflow direction in the guide channel and after flowing out from the outlet. This helps to optimize the airflow distribution around the vehicle body, allowing the air to flow along the desired path and reducing unnecessary resistance.

[0022] The wheel arch area is a region that is prone to generating significant wind resistance and turbulence during vehicle operation. The outlet is close to and connected to the wheel arch. After the airflow is sorted and regulated by the airflow guide vanes and other structures in the guide channel, it can directly enter the wheel arch area after exiting the outlet. This relatively ordered airflow with optimized velocity and direction can interfere with and neutralize the originally turbulent airflow in the wheel arch, reducing the degree of airflow turbulence caused by wheel rotation and its own shape, thereby reducing wind resistance in this area and improving the overall aerodynamic performance of the vehicle.

[0023] The airflow flowing from the outlet into the wheel arch can also cooperate with the airflow flowing from the bottom of the car body. The airflow under the car body also affects the overall wind resistance. By connecting the outlet with the wheel arch, the airflow from the guide channel can be integrated into the airflow system under the car body and around the wheel arch, making the airflow distribution under the entire car body more reasonable and orderly, avoiding local airflow obstruction or mutual conflict, and further helping to reduce the overall wind resistance during the car's driving process.

[0024] Furthermore, the airflow guide vanes are provided in multiple sets and are arranged in multiple rows in a crisscross pattern along the guide groove.

[0025] By adopting the above technical solution, when the airflow enters the guide channel from the inlet, its flow direction is not completely consistent and is quite complex. Multiple sets of airflow guide vanes are arranged in multiple rows, which can capture these messy airflows from multiple different angles. For example, some airflows may flow towards the upper part of the guide channel, while others may flow towards the lower part. The cross-arranged guide vanes can intercept and guide airflows at different heights and horizontal positions. They are like a fine "airflow guiding net", ensuring that a large amount of airflow does not run wildly in the guide channel, but is guided to the desired direction as much as possible, so that the airflow can flow more orderly in the guide channel.

[0026] The cross-arranged structure allows the airflow to turn multiple times and at multiple angles as it flows within the guide channel, depending on the setting of the guide vanes. For example, the airflow first flows along the direction of a certain set of guide vanes, and when it encounters another set of guide vanes that intersects with it, it will turn according to the new direction. This process is repeated, allowing the originally direct and disordered airflow to be sorted into a flow direction that meets the requirements for reducing wind resistance through this continuous turning, which is more conducive to guiding the airflow smoothly to the outlet.

[0027] With multiple rows of airflow guide vanes, the airflow can be fully covered in the height direction of the airflow channel. This means that the airflow near the top or bottom of the airflow channel can be guided by the corresponding guide vanes. This avoids the problem of insufficient airflow guidance in some areas that may occur when only a single row of guide vanes is set. It ensures that the airflow in the entire airflow channel is under effective control and makes the airflow distribution in the airflow channel more uniform.

[0028] Multiple rows of airflow guide vanes work together in coordination. Each row of guide vanes initially guides the airflow in its area, and subsequent rows further adjust and optimize the airflow direction. Like a relay race, the airflow is gradually guided towards the outlet, and the airflow is kept in a stable state throughout the entire airflow channel. This avoids situations such as local airflow being too fast or too slow, or turbulent flow, thereby improving the overall efficiency of the airflow channel in guiding airflow and better helping to optimize the airflow distribution around the vehicle body, thus reducing the vehicle's wind resistance.

[0029] The design of multiple sets of airflow guide vanes arranged in multiple rows along the guide channel can accurately and efficiently guide the airflow in the guide channel from multiple directions, all directions and in a coordinated manner, thereby improving the aerodynamic performance of the car.

[0030] Furthermore, the airflow guide plate is arc-shaped.

[0031] By adopting the above technical solution, when the airflow enters the guide channel, the arc-shaped airflow guide plate can better conform to the natural flow curve of the airflow. Because air, as a fluid, tends to travel along smooth curves rather than hard zigzags or right angles during flow, the arc-shaped guide plate is like a "track" specially designed for the airflow, allowing the airflow to flow smoothly along its arc surface, reducing the situation where the airflow suddenly turns and generates turbulence due to the abrupt shape of the guide plate. For example, in some pipes, if the internal guide structure adopts an arc transition, the fluid can pass through more smoothly. Here, the arc-shaped airflow guide plate plays a similar smooth guiding role for the airflow in the guide channel.

[0032] Compared to straight or sharp-edged guide vanes, arc-shaped airflow guide vanes can effectively prevent airflow from directly impacting the guide vane and creating a large impact force. When airflow hits a sharp edge, it will change direction drastically, resulting in a large loss of airflow energy and easily causing turbulence. The arc-shaped design allows the airflow to gradually change direction along its arc contour, which can better retain the energy of the airflow and maintain a relatively stable state throughout the flow process. This allows the airflow to be guided more efficiently in the guide channel and finally flow out of the outlet in a more orderly manner.

[0033] In certain situations, arc-shaped airflow guide vanes can play a role in concentrating airflow. When multiple dispersed airflows flow within the airflow channel, they encounter the arc-shaped guide vane. Its concave surface acts like a "focusing mirror," gradually converging the dispersed airflows. This increases the airflow density in a localized area and allows for a more reasonable increase in flow velocity. This facilitates the subsequent guidance of the concentrated airflow to the outlet in a predetermined direction, thus more effectively utilizing airflow to optimize the airflow distribution around the vehicle body. For example, it can guide airflow to fill areas where turbulence might occur, reducing wind resistance. Conversely,... When a fast-moving, high-volume airflow passes through the arc-shaped guide vane, its convex surface disperses the airflow, much like how a thick stream of water is dispersed into multiple thinner streams through a specially shaped object. This disperses the originally concentrated airflow into multiple relatively thinner, more controllable airflow streams, preventing the disorderly impact of a strong airflow from disrupting the overall airflow order within the guide channel. This allows the dispersed airflow to be better guided by subsequent guide vanes and evenly distributed within the guide channel, ultimately optimizing the airflow direction and reducing wind resistance.

[0034] In summary, the arc-shaped airflow guide vane plays an important role in the airflow channel due to its characteristics of smoothly guiding airflow, avoiding energy loss, and concentrating or dispersing airflow. It helps to improve the aerodynamic performance of automobiles and reduce wind resistance.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) This utility model provides a low-drag car model exterior trim. Through a unique design, it effectively reduces wind resistance. The front of the car body is rounded and slightly tilted downwards, like a water droplet, which reduces the impact of air on the front of the car and guides the airflow to flow smoothly along the lower surface of the car body, avoiding the formation of a high-pressure area in front of the car. At the same time, the design of the air guide channel and the airflow guide plate inside can guide the airflow in an orderly manner. The air enters the air guide channel from the inlet, is combed by the airflow guide plate, and flows out from the outlet in a specific direction, avoiding turbulence around the car body and significantly optimizing the aerodynamic performance of the car.

[0037] (2) The present invention provides a low wind resistance car model exterior part. The airflow guide plate of the exterior part is provided with multiple evenly distributed through holes, which have multiple functions. The through holes can reduce pressure and prevent the air pressure in the guide channel from being too high, which would lead to unstable airflow. They can also promote the exchange of airflow inside and outside the guide channel and optimize the airflow distribution around the vehicle. In addition, the multiple through holes accumulate to reduce the weight of the exterior part, which helps the overall lightweight design of the car. The lighter exterior part reduces the self-weight resistance that the car needs to overcome during driving, reduces energy consumption, and makes the vehicle more flexible in driving, turning and other operations, thus improving handling performance. Attached Figure Description

[0038] Figure 1 This is a structural schematic diagram of a low-drag car model exterior part according to the present invention.

[0039] Figure 2 This utility model relates to a low-drag exterior trim for a car model. Figure 1 Enlarged view of point A in the middle.

[0040] Figure 3 This is a schematic diagram of the internal structure of a low-drag car model exterior part according to the present invention.

[0041] Figure 4 This is a schematic diagram of the airflow guide plate structure of a low-drag car model exterior part according to the present invention.

[0042] In the diagram: 1. Vehicle body; 2. Groove; 3. Air knife; 4. Outlet; 5. Inlet; 6. Guide groove; 7. Airflow guide plate; 8. Through hole. Detailed Implementation

[0043] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0044] To prevent problems such as air impact and high-pressure zone formation at the front of the car due to the ineffective airflow guidance of common car body front designs, turbulent airflow around the car body, and the negative impact of traditional exterior parts on vehicle energy consumption and handling performance due to weight factors, thereby improving vehicle performance and energy efficiency, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a low-drag car model exterior part includes a car body 1. The front of the car body 1 is rounded and slightly sloping. The front of the car body 1 has air guide grooves 6 on both sides, starting from below the headlights and extending to the wheel arches. The rear and front parts of the two air guide grooves 6 are provided with outlets 4 and inlets 5. Airflow guide plates 7 are provided in the air guide grooves 6, and multiple evenly distributed through holes 8 are provided on the airflow guide plates 7.

[0045] When a car is in motion, air creates resistance to the vehicle body. The rounded shape of the front of the car body reduces the impact of air on the front. When air comes into contact with the front of the car, the rounded surface allows the air to flow more smoothly, while the slightly downward-sloping design helps guide the airflow downwards, allowing it to flow along the lower surface of the car body after passing the front, preventing the formation of a high-pressure zone in front of the car and thus reducing wind resistance. This is similar to the shape of a water droplet; its rounded front end allows it to move with relatively less resistance in air or water.

[0046] When the car is moving, air enters the air guide channel 6 from the inlet 5. The position of the inlet 5 is designed to capture part of the airflow in front of the car and guide it into the air guide channel 6. The outlet 4 is used to guide the airflow that has been processed by the air guide channel 6 back to the outside of the car body to avoid the airflow generating turbulence around the car body and affecting the aerodynamic performance of the vehicle.

[0047] An airflow guide plate 7 is provided inside the flow channel 6. Its main function is to guide the airflow in the flow channel 6 to flow in a specific direction. The airflow guide plate 7 can change the direction of the airflow, making it flow more orderly in the flow channel 6. It can sort out the relatively messy airflow entering from the inlet 5 into an airflow direction that is more in line with the vehicle's driving direction, so that it can flow out more smoothly from the outlet 4.

[0048] On the one hand, the through-hole 8 can reduce air pressure when airflow passes through it. If the air pressure in the guide channel 6 is too high, the airflow can be released through the through-hole 8, avoiding airflow instability caused by excessive air pressure. On the other hand, the through-hole 8 can allow some airflow to exchange inside and outside the guide channel 6, enabling the airflow inside and outside the guide channel 6 to work together better, further optimizing the airflow distribution around the vehicle, thereby reducing the overall wind resistance of the car. Finally, from the perspective of the entire car model's exterior parts, although the weight reduction of each through-hole 8 is very small, multiple through-holes 8 distributed on the airflow guide plate 7 can accumulate to play a certain role in reducing the weight of the exterior parts. This is conducive to the overall lightweight design of the car. Lighter exterior parts can reduce the car's energy consumption to a certain extent, because the drag force that the vehicle needs to overcome during driving will also be reduced accordingly. At the same time, the reduction in the weight of the exterior parts is also beneficial to the vehicle's handling performance, making the vehicle more agile during driving, steering, and other operations.

[0049] For example, such as Figure 3 As shown, the present invention also includes a funnel-shaped structure for the guide groove 6, and the diameter of the outlet 4 is larger than the diameter of the inlet 5.

[0050] When in use, when the car is moving, air will enter the guide channel 6 from the inlet 5. Because the inlet 5 has a small diameter, the airflow will speed up when passing through the inlet 5 according to Bernoulli's principle in fluid dynamics as the vehicle moves forward. This accelerated airflow can be more effectively guided into the interior of the guide channel 6.

[0051] The guide channel 6 has a funnel-shaped structure, and the internal space gradually increases from the inlet 5 to the outlet 4. When the high-speed airflow enters the guide channel 6, the airflow speed will gradually decrease as the space of the guide channel 6 gradually expands. According to Bernoulli's principle, the airflow pressure will increase as the speed decreases.

[0052] The larger diameter of outlet 4 compared to inlet 5 allows the diffused airflow to flow smoothly out of outlet 4 at a lower speed and higher pressure. The larger outlet 4 allows the airflow to be discharged more smoothly to a suitable location outside the vehicle body, guiding the airflow to the side or bottom of the vehicle body, thereby avoiding the formation of turbulence around the vehicle body and helping to reduce the overall wind resistance of the vehicle. This horn-shaped airflow guide 6 structure optimizes the airflow distribution around the vehicle body by effectively controlling the airflow speed and pressure.

[0053] For example, such as Figure 1 , Figure 2 , Figure 3 As shown, the present invention also includes grooves 2 at the front ends of the two guide grooves 6, and vertically arranged air knives 3 are provided in both grooves 2.

[0054] When in use, as the car is in motion, the airflow in front of the car will first come into contact with the area where the groove 2 is located. The presence of the groove 2 can change the original relatively direct flow path of the airflow, causing it to have a certain diversion effect. Some of the airflow will flow along the shape of the groove 2. This can pre-process the airflow that is about to enter the guide channel 6 to a certain extent, making the airflow distribution more regular and orderly, and preventing a large amount of airflow from rushing into the inlet 5 of the guide channel 6 without any rules. This lays the foundation for the subsequent airflow to enter the guide channel 6 more smoothly and be effectively guided therein.

[0055] The air knives 3 are vertically arranged in the groove 2. When the airflow passes through, the air knives 3 act like "sharp blades," cutting the airflow. They can divide the originally relatively wide and messy airflow into multiple relatively finer and more regular airflow streams. For example, in industrial production, when air knives are used to dry the material on the surface of a conveyor belt, the high-speed airflow blown by the air knives can accurately blow away the moisture. Here, the air knives 3 play a similar precise sorting role for the airflow in front of the vehicle, making the airflow direction clearer and the flow velocity distribution more uniform before entering the guide trough 6. Through the cutting and sorting of the airflow by the air knives 3, the treated airflow can smoothly enter the inlet 5 of the guide trough 6 at a more suitable angle and state. The air knives 3 can adjust the flow direction of the airflow to match the inlet 5 of the guide trough 6, ensuring that the airflow can be efficiently captured by the guide trough 6 and flow inside it according to a preset path. In conjunction with the guide trough 6 and the airflow guide plate 7 inside it, the airflow distribution around the vehicle body is better optimized, ultimately achieving the effect of reducing the vehicle's wind resistance.

[0056] For example, such as Figure 1 , Figure 2 , Figure 3 As shown, the present invention also includes an outlet 4 near the wheel arch and connected to the wheel arch, and an inlet 5 near the groove 2 and connected to the groove 2.

[0057] When in use, when the car is moving, the airflow in front of the car will first be initially diverted and regulated at the groove 2. As mentioned above, the groove 2 changes the original flow path of the airflow, making it more orderly. The inlet 5 is connected to the groove 2, so the airflow that has been pre-treated by the groove 2 can be directly and smoothly introduced into the guide channel 6. This connection design ensures that the airflow from the front of the car can be seamlessly connected into the guide channel 6 without interruption of the airflow or turbulence caused by poor connection, making the process of the airflow entering the guide channel 6 smoother and more efficient.

[0058] Because the inlet 5 is closely connected to the groove 2, the airflow system in front of the entire vehicle is organized more rationally. From a macro perspective, it allows the overall airflow at the front of the vehicle to enter the guide channel 6 in an orderly manner according to the predetermined design, laying a good foundation for the subsequent airflow direction in the guide channel 6 and after flowing out from the outlet 4. This helps to optimize the airflow distribution around the vehicle body, allowing the air to flow along the desired path and reducing unnecessary resistance.

[0059] The wheel arch area is a region that is prone to generating significant wind resistance and turbulence during vehicle operation. The outlet 4 is close to and connected to the wheel arch. After the airflow is sorted and regulated by the airflow guide vanes 7 and other structures in the guide channel 6, it flows out of the outlet 4 and can directly enter the wheel arch area. This relatively ordered airflow with optimized velocity and direction can interfere with and neutralize the originally turbulent airflow at the wheel arch, reducing the degree of airflow turbulence caused by wheel rotation and its own shape, thereby reducing wind resistance in this area and improving the overall aerodynamic performance of the vehicle.

[0060] The airflow flowing into the wheel arch from outlet 4 can also cooperate with the airflow flowing from the bottom of the car body. The airflow at the bottom of the car also affects the overall wind resistance. Through the connection between outlet 4 and the wheel arch, the airflow from the guide channel 6 can be integrated into the airflow system at the bottom of the car body and around the wheel arch, making the airflow distribution in the lower part of the car body more reasonable and orderly, avoiding local airflow obstruction or mutual conflict, and further helping to reduce the overall wind resistance during the car's driving process.

[0061] For example, such as Figure 3 As shown, the present invention also includes multiple sets of airflow guide plates 7, which are arranged in multiple rows along the guide groove 6.

[0062] When in use, after the airflow enters the guide channel 6 from the inlet 5, its flow direction is not completely consistent and is quite complex. Multiple sets of airflow guide vanes 7 are arranged in multiple rows, which can capture these messy airflows from multiple different angles. For example, some airflows may flow towards the upper part of the guide channel 6, while others may flow towards the lower part. The cross-arranged guide vanes can intercept and guide airflows at different heights and horizontal positions. They are like a fine "airflow guiding net", ensuring that a large amount of airflow does not run wildly in the guide channel 6, but is guided to the desired direction as much as possible, so that the airflow can flow more orderly in the guide channel 6.

[0063] The cross-arranged structure allows the airflow to turn multiple times and at multiple angles as it flows within the guide channel 6, depending on the arrangement of the guide plates 7. For example, the airflow first flows along the direction of a certain set of guide plates, and when it encounters another set of guide plates that intersects with it, it will turn according to the new direction. This process is repeated, allowing the originally direct and disordered airflow to be sorted into a flow direction that meets the requirements for reducing wind resistance through this continuous turning, which is more conducive to guiding the airflow smoothly to the outlet 4.

[0064] The system is equipped with multiple rows of airflow guide vanes 7, which can achieve full coverage in the height direction of the guide channel 6. This ensures that the airflow near the top or bottom of the guide channel 6 can be guided by the corresponding guide vanes. This avoids the problem of insufficient airflow guidance in some areas that may occur when only a single row of guide vanes is set, and ensures that the airflow in the entire guide channel 6 is under effective control, making the airflow distribution in the guide channel 6 more uniform.

[0065] The multiple rows of airflow guide vanes 7 work together in coordination. Each row of guide vanes initially guides the airflow in its area, and subsequent rows of guide vanes further adjust and optimize the airflow direction. Like a relay race, the airflow is gradually guided towards the outlet 4, and the airflow is kept in a stable state within the entire airflow channel 6. This avoids situations such as local airflow being too fast or too slow, or turbulent flow, thereby improving the overall efficiency of the airflow guidance of the entire airflow channel 6 and better helping to optimize the airflow distribution around the vehicle body, thus reducing the vehicle's wind resistance.

[0066] The design of multiple sets of airflow guide vanes 7 arranged in multiple rows along the guide groove 6 can accurately and efficiently guide the airflow in the guide groove 6 from multiple directions, all directions and in a coordinated manner, thereby improving the aerodynamic performance of the car.

[0067] For example, such as Figure 3 As shown, the present invention also includes an airflow guide plate 7 that is arc-shaped.

[0068] When in use, after the airflow enters the guide groove 6, the arc-shaped airflow guide 7 can better conform to the natural flow curve of the airflow. Because air, as a fluid, tends to travel along smooth curves rather than hard lines or right angles during flow, the arc-shaped guide 7 is like a "track" specially designed for the airflow, allowing the airflow to flow smoothly along its arc surface, reducing the situation where the airflow suddenly turns and turbulence is generated due to the abrupt shape of the guide 7. For example, in some pipes, if the internal guide structure adopts an arc transition, the fluid can pass through more smoothly. Here, the arc-shaped airflow guide 7 plays a similar smooth guiding role for the airflow in the guide groove 6.

[0069] Compared to straight or sharp-edged guide vanes, the arc-shaped airflow guide vane 7 can effectively prevent airflow from directly impacting the guide vane and generating a large impact force. When airflow hits a sharp corner, it will change direction drastically, resulting in a large loss of airflow energy and easily causing turbulence. The arc-shaped design allows the airflow to gradually change direction along its arc contour, so that the airflow energy can be better preserved and maintain a relatively stable state throughout the flow process. This allows the airflow to be guided more efficiently in the guide groove 6 and finally flow out from the outlet 4 in a more orderly manner.

[0070] In some situations, the arc-shaped airflow guide vane 7 can play a role in concentrating airflow. When multiple dispersed airflows flow within the guide channel 6, they encounter the arc-shaped guide vane. Its concave surface acts like a "focusing mirror," gradually converging the dispersed airflows and increasing their density in a localized area. This allows for a more reasonable increase in flow velocity, facilitating the subsequent guidance of these concentrated airflows to the outlet 4 in a predetermined direction. This enables more effective utilization of airflow to optimize the airflow distribution around the vehicle body, such as guiding airflow to fill areas where turbulence might occur, reducing wind resistance. Conversely, When a fast-moving, high-volume airflow passes through the arc-shaped guide plate 7, its convex arc surface can disperse the airflow, much like dispersing a thick stream of water into multiple thinner streams through a specially shaped object. This disperses the originally concentrated airflow into multiple relatively thinner, more controllable airflow streams, preventing the disorderly impact of a strong airflow from disrupting the overall airflow order within the guide channel 6. This allows the dispersed airflow to be better guided by subsequent guide plates and evenly distributed within the guide channel 6, ultimately optimizing the airflow direction and reducing wind resistance.

[0071] In summary, the arc-shaped airflow guide 7 plays an important role in the airflow channel 6 due to its characteristics of smoothly guiding airflow, avoiding energy loss, and concentrating or dispersing airflow. It helps to improve the aerodynamic performance of the car and reduce wind resistance.

[0072] It should be noted that this utility model is a low-drag car model exterior part. When the car is moving, the air generates resistance to the car body and first comes into contact with the front of the car body 1. Its rounded and slightly downward-sloping shape plays a role. The rounded surface allows the air to flow smoothly, reducing the impact on the front of the car. The slightly downward-sloping design guides the airflow downward and flows along the lower surface of the car body, avoiding the formation of a high-pressure area in front of the car and reducing wind resistance.

[0073] At the same time, the airflow in front of the vehicle comes to the groove 2 at the front end of the guide channel 6. The groove 2 changes the original direct flow path of the airflow, creating a diversion effect, causing some of the airflow to flow along the shape of the groove 2, pre-processing the airflow that is about to enter the guide channel 6, making the airflow distribution more regular and orderly. The vertically arranged air knife 3 in the groove 2 further manipulates the airflow, dividing the relatively wide and messy airflow bundle into multiple finer and more regular airflow bundles, accurately sorting the airflow, making its direction clearer and its velocity distribution more uniform, and then smoothly entering the guide channel 6 through the inlet 5 connected to the groove 2 at a suitable angle and state.

[0074] Air enters the guide channel 6 through inlet 5. Due to the smaller diameter of inlet 5, according to Bernoulli's principle, the airflow speed increases as it passes through, and it is more effectively guided into the guide channel 6. Inside the guide channel 6, the airflow encounters multiple sets of arc-shaped airflow guide vanes 7 arranged in multiple rows along the guide channel 6. These arc-shaped guide vanes conform to the natural flow curve of the airflow, smoothly guiding it and preventing turbulence and energy loss caused by impacts. This allows the airflow to flow smoothly along the arc-shaped surface. Simultaneously, the concave surface of the arc can concentrate and disperse airflow, or the convex surface can disperse fast-moving and high-volume airflow, maintaining airflow order and allowing for better guidance. The guide vanes, arranged in multiple rows, guide airflow from multiple directions... It captures, intercepts, and guides chaotic airflow at different heights and horizontal positions in all directions. Through multiple and multi-angle turns, it organizes the airflow into a flow direction that meets the requirements for reducing wind resistance, and fully covers the vertical direction, so that the airflow distribution in the guide channel 6 is uniform. The guide vanes work together to guide the airflow smoothly and steadily to the outlet 4 like a relay. The through holes 8 evenly distributed on the airflow guide vanes 7 play a role. On the one hand, if the air pressure in the guide channel 6 is too high, the airflow can release pressure through the through holes 8 to avoid airflow instability. On the other hand, the through holes 8 allow some airflow inside and outside the guide channel 6 to exchange, allowing the internal and external airflows to work together to further optimize the airflow distribution around the vehicle.

[0075] The treated airflow flows out from outlet 4. The diameter of outlet 4 is larger than that of inlet 5, and the guide channel 6 is a funnel-shaped structure. According to Bernoulli's principle, after the high-speed airflow enters, its speed decreases and its pressure increases as the space increases. Finally, it flows out from outlet 4 smoothly with a lower speed and higher pressure. Outlet 4 is close to and connected to the wheel arch. The relatively orderly airflow with optimized speed and direction enters the wheel arch area, which interferes with and neutralizes the originally turbulent airflow at the wheel arch, reducing wind resistance at the wheel arch. It also works in coordination with the airflow flowing under the vehicle body to make the airflow distribution under the entire vehicle body more reasonable and orderly, avoiding local airflow obstruction or mutual conflict, and ultimately achieving the effect of reducing the overall wind resistance of the car.

[0076] In summary, the various components work together to form a complete working flow, from the pretreatment of airflow at the front of the vehicle, to the guidance and regulation of airflow within the air guide 6, and then to the optimization of airflow around the vehicle body after the airflow exits, effectively improving the aerodynamic performance of the car and reducing wind resistance.

[0077] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-drag car model exterior trim, comprising a car body (1), characterized in that, The front of the vehicle body (1) is rounded and slightly tilted downwards. The front of the vehicle body (1) has guide grooves (6) on both sides, starting from below the headlights and extending to the wheel arches. The rear and front parts of the two guide grooves (6) are provided with outlets (4) and inlets (5). Airflow guide plates (7) are provided in the guide grooves (6). Multiple evenly distributed through holes (8) are provided on the airflow guide plates (7).

2. The low-drag car model exterior trim according to claim 1, characterized in that: The guide channel (6) has a trumpet-shaped structure, and the outlet (4) has a larger diameter than the inlet (5).

3. The low-drag car model exterior trim according to claim 1, characterized in that: The front ends of the two guide channels (6) are provided with grooves (2), and vertically arranged air knives (3) are provided in both grooves (2).

4. The low-drag car model exterior trim according to claim 1, characterized in that: The outlet (4) is close to the wheel arch and is connected to the wheel arch, and the inlet (5) is close to the groove (2) and is connected to the groove (2).

5. The low-drag car model exterior trim according to claim 1, characterized in that: The airflow guide plate (7) is provided in multiple sets and is arranged in multiple rows in a cross pattern along the guide groove (6).

6. The low-drag car model exterior trim according to claim 1, characterized in that: The airflow guide plate (7) is arc-shaped.

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