Drag reduction and diversion devices, vehicles

Abstract

This application relates to a drag-reducing and airflow-guiding device and a vehicle. The drag-reducing and airflow-guiding device includes: a protective plate body located below the muffler of the vehicle, the protective plate body having an air inlet; an air guide grille movably mounted on the air inlet; and a driving member connecting the protective plate body and the air guide grille, the driving member being configured to drive the air guide grille to switch between a first state of closing the air inlet and a second state of opening the air inlet. When muffler cooling is not required, the driving member drives the air guide grille to rotate to the first state, closing the air inlet, preventing airflow from reaching the upper side of the protective plate body through the air inlet, and allowing airflow to be guided through the protective plate body and the air guide grille, reducing air resistance and improving range and energy efficiency; when muffler cooling is required, the driving member drives the air guide grille to rotate to the second state, opening the air inlet, allowing airflow to reach the upper side of the protective plate body through the air inlet, thereby cooling the muffler and improving its heat dissipation efficiency.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a drag-reducing and flow-guiding device and a vehicle. Background Technology

[0002] With the development of vehicle technology, reducing wind resistance has become an important issue in vehicle design.

[0003] Adding a skid plate under the exhaust system can reduce wind resistance and improve driving range. However, the skid plate will affect the heat dissipation of the muffler in the vehicle's exhaust system. In order to meet the heat dissipation requirements of the vehicle's exhaust system muffler, the skid plate is usually not used.

[0004] Some vehicle models use an underbody protection plate to reduce air resistance by guiding airflow. Ventilation holes are added to the underbody protection plate to direct airflow to the upper part of the plate, mitigating its negative impact on muffler cooling. However, the airflow entering the ventilation holes impacts the underbody structure, creating wind resistance. This is especially problematic when muffler cooling is not required; in such cases, the ventilation holes only increase wind resistance. Therefore, the solution of adding an underbody protection plate with ventilation holes still fails to adequately balance muffler cooling needs with vehicle fuel efficiency requirements.

[0005] Therefore, a flow-guiding and resistance-reducing device is needed to simultaneously meet the vehicle's muffler heat dissipation and energy-saving requirements. Utility Model Content

[0006] Based on this, a drag-reducing and flow-guiding device and a vehicle are provided to meet the heat dissipation requirements of the vehicle's muffler and achieve energy saving.

[0007] This application provides a drag-reducing and airflow-guiding device, comprising: a guard plate body located below the muffler of a vehicle and fixedly connected to the vehicle, the guard plate body being provided with an air inlet; an air guide grille movably installed on the air inlet; and a driving member connecting the guard plate body and the air guide grille, the driving member being configured to drive the air guide grille to switch between a first state of closing the air inlet and a second state of opening the air inlet.

[0008] According to one embodiment of this application, one side of the air guide grille is rotatably connected to the guard plate body via a rotating shaft, and the other side is connected to the driving member, the driving member being adapted to drive the air guide grille to rotate.

[0009] According to one embodiment of this application, the air guide grille is configured such that, in the second state, the side of the air guide grille facing away from the rotation axis is located below the guard plate body and faces the front of the vehicle.

[0010] According to one embodiment of this application, the air guide grille is configured such that, in the first state, the side of the air guide grille opposite to the rotation axis overlaps with the guard plate body.

[0011] According to one embodiment of this application, the guard plate body is provided with a receiving groove, and in the first state, the driving member is located in the receiving groove.

[0012] According to one embodiment of this application, the driving component includes a memory spring, one end of which is fixedly connected to the guard plate body and the other end is fixedly connected to the air guide grille.

[0013] According to one embodiment of this application, one side of the guard plate body is connected to the rear suspension guard plate of the vehicle, and / or, one side of the guard plate body is connected to the rear bumper of the vehicle.

[0014] According to one embodiment of this application, the guard plate body is provided with at least one air vent on the side facing the rear of the vehicle.

[0015] According to one embodiment of this application, a filter screen is also included, the filter screen being disposed at the air outlet and / or the air inlet.

[0016] This application also provides a vehicle, including: a muffler; and the drag-reducing and flow-guiding device of the above embodiments.

[0017] When the aforementioned drag-reducing and airflow-guiding device and vehicle do not require muffler cooling, the air guide grille can be driven to rotate to the first state by the driving component, closing the air inlet. The airflow will not reach the upper side of the protective plate body through the air inlet, and can be guided through the protective plate body and the air guide grille, reducing air resistance and improving range and energy utilization. When muffler cooling is required, the air guide grille can be driven to rotate to the second state by the driving component, opening the air inlet. The airflow reaches the upper side of the protective plate body through the air inlet, which can cool the muffler and improve the muffler's heat dissipation efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram showing the installation location of the muffler.

[0019] Figure 2 This is a diagram illustrating an application scenario of a drag-reducing and flow-guiding device according to an embodiment of this application.

[0020] Figure 3 This is a bottom view of the installation structure of a drag-reducing and flow-guiding device according to an embodiment of this application.

[0021] Figure 4 This is a schematic diagram illustrating the working principle of a drag-reducing and flow-guiding device according to an embodiment of this application when the air guide grille is in the first state.

[0022] Figure 5 This is a schematic diagram illustrating the working principle of a drag-reducing and flow-guiding device according to an embodiment of this application when the air guide grille is in the second state.

[0023] Figure label:

[0024] 100. Vehicle; 110. Muffler; 120. Rear suspension guard plate; 130. Rear bumper;

[0025] 200. Protective panel body; 210. Air inlet; 220. Receiving slot; 230. Air outlet; 240. Filter screen;

[0026] 300. Air guide grille; 310. Rotating shaft;

[0027] 400. Drive components. Detailed Implementation

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Combination Figures 1 to 5 , Figure 4 and Figure 5 The arrows in the diagram indicate the direction of airflow.

[0035] An embodiment of this application provides a drag-reducing and airflow-guiding device, including a guard plate body 200, an air guide grille 300, and a drive member 400. The guard plate body 200 is located below the muffler 110 of the vehicle 100 and is fixedly connected to the vehicle 100. The guard plate body 200 is provided with an air inlet 210. The air guide grille 300 is movably installed on the air inlet 210. The drive member 400 connects the guard plate body 200 and the air guide grille 300, and the drive member 400 is configured to drive the air guide grille 300 to switch between a first state of closing the air inlet 210 and a second state of opening the air inlet 210.

[0036] The guard plate body 200 is located below the muffler 110 of the vehicle 100, providing downward shielding and protection for the muffler 110. To ensure the stability of the device during vehicle 100 operation, the guard plate body 200 is fixedly connected to the vehicle 100, forming a stable integral structure. This prevents the guard plate body 200 from shifting or loosening due to vibrations, airflow impacts, or other factors during vehicle 100 operation. The fixing method can be welding, riveting, snap-fitting, or bonding, etc., and no specific limitation is made here.

[0037] An air inlet 210 is provided on the protective plate body 200. The air inlet 210 is a channel structure for airflow to enter the space between the protective plate body 200 and the muffler 110. The location and size of the air inlet 210 must meet the airflow requirements to ensure that when the subsequent air guide grille 300 is opened, the external airflow can smoothly enter the upper side of the protective plate body 200, that is, the side of the protective plate body 200 facing the muffler 110, thereby providing airflow conditions for the muffler 110 to dissipate heat.

[0038] The air guide grille 300 enables the opening and closing of the air inlet 210. It is installed at the air inlet 210 of the protective plate body 200 and is movable in its installation. Specifically, the movable nature of the air guide grille 300 allows it to change position or orientation relative to the air inlet 210. Through the movement of the air guide grille 300, it can directly cover or detach from the air inlet 210, thereby controlling the on / off state of the air inlet 210. The movement trajectory matches the position and shape of the air inlet 210, ensuring that the air guide grille 300 can accurately cover or detach from the air inlet 210. The movement methods may include, but are not limited to, rotation and translation.

[0039] The drive unit 400 connects both the protective plate body 200 and the air guide grille 300. The drive unit 400 is configured to switch the air guide grille 300 between two specific states: the first state is a closed air inlet 210 state, where external airflow cannot enter the upper part of the protective plate body 200 through the air inlet 210; the second state is an open air inlet 210 state, where the air inlet 210 is open, allowing external airflow to smoothly enter the upper part of the protective plate body 200 through the air inlet 210. By driving the drive unit 400, the position of the air guide grille 300 at the air inlet 210 is changed, realizing the opening and closing of the air inlet 210, thereby regulating the airflow between the protective plate body 200 and the muffler 110.

[0040] Traditional vehicles have two major drawbacks: First, to meet the heat dissipation requirements of the muffler 110, no protective plate is installed below the muffler 110, causing the muffler 110 to be exposed to the airflow under the vehicle. The airflow becomes turbulent when passing through the muffler 110, which greatly increases the vehicle's wind resistance and reduces its range. Second, although some vehicles have a protective plate with ventilation holes below the muffler 110, the ventilation holes are always open. Even when the muffler 110 does not need to be cooled, the airflow will still enter through the ventilation holes and impact the undercarriage structure, which also affects the range and energy efficiency.

[0041] This solution addresses the aforementioned pain points by controlling the switching states of the air guide grille 300 via the drive unit 400: When the vehicle 100 does not require heat dissipation for the muffler 110, such as when the muffler 110 is at a low temperature, the drive unit 400 drives the air guide grille 300 to the first state of closing the air intake 210. At this time, the skid plate body 200 can smoothly guide the airflow under the vehicle, and the airflow flows along the lower surface of the skid plate body 200 towards the rear of the vehicle 100. This prevents airflow turbulence caused by the exposure of the muffler 110 or air intake through the ventilation holes, significantly reducing the vehicle 100's wind resistance and thus improving vehicle performance. 100 range and energy efficiency; when the vehicle 100 needs to dissipate heat from the muffler 110, such as when the temperature of the muffler 110 rises to a level that requires cooling, the drive unit 400 drives the air guide grille 300 to the second state of opening the air inlet 210. At this time, the external airflow can enter the upper side of the guard plate body 200 through the air inlet 210 and act directly on the surface of the muffler 110. The airflow carries away the heat of the muffler 110, effectively reducing the temperature of the muffler 110, meeting the heat dissipation requirements of the muffler 110, and avoiding the risk of the surrounding components overheating due to the excessive temperature of the muffler 110.

[0042] In some embodiments, one side of the air guide grille 300 is rotatably connected to the guard plate body 200 via a rotating shaft 310, and the other side is connected to the drive member 400, which is adapted to drive the air guide grille 300 to rotate.

[0043] Both ends of the rotating shaft 310 are respectively connected to the pre-set mounting holes on the guard plate body 200 to ensure that the rotating shaft 310 can rotate stably relative to the guard plate body 200. The side of the air guide grille 300 facing the rotating shaft 310 is fixedly connected to the rotating shaft 310, so that the air guide grille 300 can rotate synchronously with the rotation of the rotating shaft 310. The side of the air guide grille 300 away from the rotating shaft 310 is connected to one end of the driving member 400, and the other end of the driving member 400 is fixedly connected to the pre-set connection point on the guard plate body 200. When the driving member 400 generates driving force, it will apply a pulling or pushing force to the side of the air guide grille 300 away from the rotating shaft 310, thereby driving the air guide grille 300 to rotate around the rotating shaft 310, realizing the switching of the air guide grille 300 between the first state and the second state.

[0044] The air guide grille 300 and the protective plate body 200 are rotatably connected via the rotating shaft 310, ensuring strong structural stability and preventing the air guide grille 300 from shifting or jamming during rotation, thus ensuring smooth switching of the air guide grille 300's state. The drive component 400 is directly connected to the side of the air guide grille 300 away from the rotating shaft 310, providing a short and direct transmission path for the driving force. This allows for precise control of the rotation angle of the air guide grille 300, thereby accurately controlling the opening and closing degree of the air inlet 210. This ensures the sealing effect of the air inlet 210 in the first state and maintains an appropriate opening size in the second state to meet heat dissipation requirements.

[0045] In some embodiments, the air deflector grille 300 is configured in a second state such that the side of the air deflector grille 300 opposite to the rotation axis 310 is located below the guard plate body 200 and faces the front side of the vehicle 100.

[0046] The second state is when the air intake 210 of the air guide grille 300 is open. In this state, after the air guide grille 300 rotates around the rotation axis 310, the side of it facing away from the rotation axis 310 will be below the lower surface of the guard plate body 200, that is, the position of this side is lower than the lower surface of the guard plate body 200. At the same time, this side facing away from the rotation axis 310 will face the front of the vehicle 100, that is, it is consistent with the forward direction of the vehicle 100. This orientation setting allows the airflow in front of the vehicle 100 to flow more smoothly to the air intake 210 along the orientation of the side of the air guide grille 300 facing away from the rotation axis 310 during the vehicle's movement, and enter the space between the guard plate body 200 and the muffler 110 through the air intake 210.

[0047] The side of the air guide grille 300 facing away from the rotation axis 310 faces the front of the vehicle 100. This allows it to fully utilize the airflow generated when the vehicle 100 is in motion, guiding the airflow more efficiently into the air intake 210, increasing the rate and flow of airflow, and thus allowing more cool air to come into contact with the muffler 110, significantly improving the heat dissipation efficiency of the muffler 110. Simultaneously, this side is located below the skid plate body 200, preventing interference with the skid plate body 200 or other components on the bottom of the vehicle 100, avoiding interference that could affect the normal operation of the air guide grille 300. Furthermore, this positioning reduces the impact between the airflow and the air guide grille 300, further reducing wind resistance during vehicle 100 operation and contributing to improved vehicle 100 range.

[0048] In some embodiments, the air guide grille 300 is configured such that, in a first state, the side of the air guide grille 300 facing away from the rotation axis 310 overlaps with the guard plate body 200.

[0049] The first state is when the air guide grille 300 closes the air inlet 210. In this state, the air guide grille 300 rotates around the rotation axis 310 to a position where it fits against the protective plate body 200. The side of the air guide grille 300 facing away from the rotation axis 310 will come into close contact with the overlapping surface of the protective plate body 200 in front of the air inlet 210, forming an overlapping structure. The preset overlapping surface of the protective plate body 200 is a plane or curved surface that matches the side of the air guide grille 300 facing away from the rotation axis 310, ensuring that the two can completely cover the air inlet 210 when overlapping, without leaving gaps at the overlapping point, thereby blocking external airflow from entering the space between the protective plate body 200 and the muffler 110 through the air inlet 210.

[0050] The overlapping structure between the air guide grille 300 and the protective plate body 200 ensures a reliable seal for the air inlet 210. This prevents external airflow from entering the inner side of the protective plate body 200 through the air inlet 210 and impacting the muffler 110 or other components when heat dissipation is not required. This prevents airflow turbulence from increasing the vehicle's wind resistance and effectively ensures the vehicle's range and energy efficiency. Simultaneously, the overlapping structure also prevents dust, stones, and other impurities from entering the inner side of the protective plate body 200, avoiding impurities adhering to the surface of the muffler 110 and affecting heat dissipation, thus extending the service life of all components.

[0051] In some embodiments, the guard plate body 200 is provided with a receiving groove 220, and in a first state, the drive member 400 is located in the receiving groove 220.

[0052] The receiving groove 220 is formed on the side of the guard plate body 200 facing the air guide grille 300. The size and shape of the groove are adapted to the shape of the drive member 400, and can completely accommodate the drive member 400. When the air guide grille 300 is in the first state of closing the air inlet 210, the drive member 400 will enter the receiving groove 220 as the air guide grille 300 rotates, and the outer surface of the drive member 400 will not exceed the opening of the receiving groove 220, so that the drive member 400 is completely inside the receiving groove 220 of the guard plate body 200 and is not exposed on the surface of the guard plate body 200.

[0053] The recess 220 provides a concealed installation space for the drive component 400, preventing it from being exposed on the surface of the guard plate body 200. This reduces the direct impact of airflow on the drive component 400 during vehicle operation, lowering the risk of damage or performance degradation due to airflow impact. It also prevents impurities from directly contacting the drive component 400, protecting it and extending its service life. Furthermore, the drive component 400's location within the recess 220 allows the air guide grille 300 to fit more tightly against the guard plate body 200 in its initial state, preventing gaps between the air guide grille 300 and the guard plate body 200 caused by the drive component 400 protruding. This further ensures the sealing effect of the air inlet 210 and reduces wind resistance.

[0054] Optionally, the receiving groove 220 is integrally formed from the guard plate body 200. During the manufacturing process of the guard plate body 200, a predetermined area of ​​the guard plate body 200 is integrally processed through processes such as stamping and bending to form a recessed receiving groove 220 structure, without the need for additional splicing or welding of other components. The integrally bent receiving groove 220 and the guard plate body 200 are a single unit with no splicing gaps. The size and shape of its groove are designed according to the external dimensions of the drive component 400, ensuring that the drive component 400 can be completely placed into the receiving groove 220 in the first state. The depth, width, and length of the receiving groove 220 are all adapted to the drive component 400, and there will be no inability to accommodate the drive component 400 or wobbling after placement due to dimensional deviations. At the same time, the opening edge of the receiving groove 220 is smoothed to avoid sharp edges and prevent component wear during the assembly of the drive component 400 or the movement of the air guide grille 300.

[0055] In some embodiments, the drive member 400 includes a memory spring, one end of which is fixedly connected to the guard plate body 200 and the other end is fixedly connected to the air guide grille 300.

[0056] The memory spring has the characteristic of automatically deforming according to temperature changes. When the temperature rises to a preset value, the memory spring will extend and deform; when the temperature drops to the preset value, the memory spring will return to its contracted state. One end of the memory spring is connected to a preset fixing point on the protective plate body 200 by means such as welding or snap-fitting, and the other end is connected to a preset fixing point on the air guide grille 300 by the same fixing method to ensure a firm connection. When the temperature of the muffler 110 rises, the memory spring will extend with the temperature rise, applying a pushing or pulling force to the air guide grille 300, causing the air guide grille 300 to rotate around the rotation axis 310 to the second state of opening the air inlet 210; when the temperature of the muffler 110 drops, the memory spring will contract with the temperature drop, pulling or pushing the air guide grille 300 to rotate around the rotation axis 310 to the first state of closing the air inlet 210.

[0057] Using a memory spring as the driving component 400 eliminates the need for additional electrical control systems, sensors, and other control components. The automatic switching of the air guide grille 300 is achieved solely through the temperature-sensing deformation characteristics of the memory spring itself, significantly simplifying the overall structure of the device and reducing manufacturing and maintenance costs. The memory spring has high temperature sensitivity, enabling it to quickly respond to temperature changes in the muffler 110 and promptly adjust the state of the air guide grille 300. This ensures that the air inlet 210 opens quickly when the muffler 110 needs heat dissipation and closes promptly when the temperature drops, balancing heat dissipation and resistance reduction requirements. Furthermore, the memory spring has a long service life and high operational stability, guaranteeing long-term reliable operation of the device.

[0058] Of course, in some other embodiments, the drive unit 400 may also take other structural forms such as a telescopic motor or a cylinder.

[0059] In some embodiments, one side of the guard plate body 200 is connected to the rear suspension guard plate 120 of the vehicle 100, and / or, one side of the guard plate body 200 is connected to the rear bumper 130 of the vehicle 100.

[0060] The above and / or descriptions of the connection methods of the skid plate body 200 can include the following three cases: the first is that one side of the skid plate body 200 is only connected to the rear suspension skid plate 120 of the vehicle 100; the second is that one side of the skid plate body 200 is only connected to the rear bumper 130 of the vehicle 100; and the third is that one side of the skid plate body 200 is connected to both the rear suspension skid plate 120 and the rear bumper 130 of the vehicle 100. The connection is achieved through fixing methods such as bolts and clips. The skid plate body 200 has pre-set connection holes or connection structures that are compatible with the rear suspension skid plate 120 and the rear bumper 130 to ensure that there is no relative wobbling after the skid plate body 200 is connected to the rear suspension skid plate 120 and the rear bumper 130, thus maintaining a stable installation.

[0061] By utilizing the existing rear suspension skid plate 120 and rear bumper 130 of vehicle 100 as the mounting base for skid plate body 200, there is no need to set up additional dedicated mounting brackets or structures for skid plate body 200, simplifying the installation process and reducing installation costs. Simultaneously, the rear suspension skid plate 120 and rear bumper 130 are structurally stable components on vehicle 100; connecting with these components ensures the overall stability of skid plate body 200 after installation, preventing displacement or loosening of skid plate body 200 due to vibration, airflow impact, or other factors during vehicle 100 operation, ensuring the device can stably perform its drag reduction and heat dissipation functions. Furthermore, the rear suspension skid plate 120 and rear bumper 130 can be spliced ​​with skid plate body 200 to form a more complete airflow guiding structure, further reducing wind resistance.

[0062] In some embodiments, the guard plate body 200 is provided with at least one air vent 230 on the side facing the rear of the vehicle 100.

[0063] Air vents 230 are located on the side of the skid plate body 200 facing the rear of the vehicle 100. There can be one or more vents 230, which can be evenly distributed on this side of the skid plate body 200. The air vents 230 are connected to the internal space of the skid plate body 200. When airflow enters the space between the skid plate body 200 and the muffler 110 from the air inlet 210, it flows through the air vents 230 towards the rear of the vehicle 100, driven by the airflow's own characteristics and the movement of the vehicle 100, forming a complete airflow path. Of course, airflow can also exit through openings in other parts of the vehicle 100 structure, such as the rear bumper 130; this is not specifically limited here.

[0064] The placement of the air vent 230 allows airflow entering the inner side of the skid plate body 200 to be smoothly discharged, forming an airflow circulation. This ensures that cool air, after contacting the muffler 110 and absorbing heat, flows out promptly, preventing hot airflow from stagnating inside the skid plate body 200. This continuously brings fresh cool air to the muffler 110, significantly improving its heat dissipation efficiency. Simultaneously, the orderly flow of airflow towards the rear of the vehicle through the air vent 230 reduces turbulence within the skid plate body 200, further reducing wind resistance during vehicle 100 operation and contributing to improved vehicle 100 range.

[0065] In some embodiments, the drag-reducing and air-guiding device further includes a filter screen 240, which is disposed at the air outlet 230 and / or the air inlet 210.

[0066] The filter 240 can be installed in three ways: first, only at the air outlet 230; second, only at the air inlet 210; and third, at both the air outlet 230 and the air inlet 210. The filter 240 is made of a filtration material, such as a metal mesh or fiber mesh. It is fixed to the inside or outside of the air outlet 230 or air inlet 210 using clips, bolts, or other means, completely covering the opening area of ​​the air outlet 230 or air inlet 210. When airflow passes through the air outlet 230 or air inlet 210, the filter 240 blocks dust, pebbles, debris, and other impurities carried in the airflow, preventing impurities from entering the inner side of the protective plate body 200 or being carried away during discharge.

[0067] The filter 240 effectively blocks impurities from entering the inner side of the guard plate body 200, preventing impurities from adhering to the surface of the muffler 110 and affecting heat dissipation, or from entering moving parts such as the drive component 400 and rotating shaft 310, which could lead to accelerated wear, jamming, and other malfunctions. This extends the service life of each component and reduces maintenance frequency and costs. Simultaneously, installing the filter 240 at the air outlet 230 also prevents impurities (such as debris from the surface of the muffler 110) that may be present inside the guard plate body 200 from affecting other components of the vehicle 100 after being discharged with the airflow, further ensuring the overall reliability of the vehicle 100.

[0068] In some embodiments, a plurality of airflow guide ribs extending along the airflow direction are integrally formed on the inner side of the protective plate body 200 corresponding to the air inlet 210. The airflow guide ribs are arranged at a gentle inclination from the edge of the air inlet 210 toward the surface of the muffler 110, and the guide ribs are spaced evenly to form a diversion channel. This better guides the airflow to the muffler 110 and improves the heat dissipation effect.

[0069] In some embodiments, a flexible spring protective sleeve made of resistant and flexible material is fitted over the outside of the memory spring. One end of the protective sleeve is fixedly connected to the groove wall of the receiving groove 220 on the protective plate body 200, and the other end is fixedly connected to the part of the air guide grille 300 that connects to the memory spring. The side wall of the protective sleeve is provided with a pre-reserved expansion and contraction slot to adapt to the deformation of the memory spring along the expansion and contraction direction. This not only does not hinder the expansion and contraction of the memory spring, but also isolates external impurities from direct contact with the memory spring, and can reduce the impact of sudden temperature changes of the muffler 110 on the memory spring.

[0070] This application also provides a vehicle 100, including a muffler 110 and the above-described drag-reducing and flow-guiding device.

[0071] For example, the vehicle 100 includes a muffler 110 for exhaust noise reduction and a drag-reducing and airflow guiding device mounted on the lower side of the muffler 110; wherein the protective plate body 200 of the drag-reducing and airflow guiding device is connected and fixed to the rear suspension protective plate 120 and the rear bumper 130 of the vehicle 100 through a fixing structure. The protective plate body 200 has an air inlet 210 and an air outlet 230 for airflow to enter and exit. A movable air guide grille 300 is installed at the air inlet 210 through a rotating shaft 310. A memory spring is connected between the air guide grille 300 and the protective plate body 200 as a driving component 400. The memory spring can automatically expand and contract with the temperature change of the muffler 110, thereby driving the air guide grille 300 to switch between a first state with the air inlet 210 closed and a second state with the air inlet 210 open. The protective plate body 200 has an integrally formed receiving groove 220 corresponding to the position of the memory spring. When the air guide grille 300 is in the first state, the memory spring can be stored in the groove. The vehicle 100 utilizes the coordinated operation of the muffler 110 and the drag-reducing and air-guiding device. When the muffler 110's temperature rises and requires heat dissipation, the memory spring extends, driving the air guide grille 300 to open the air inlet 210. Airflow from under the vehicle enters the inner side of the skid plate body 200 through the air inlet 210 and contacts the muffler 110 for heat dissipation. The hot airflow is then discharged from the air outlet 230. When the muffler 110's temperature drops and heat dissipation is no longer needed, the memory spring retracts, driving the air guide grille 300 to close the air inlet 210. The skid plate body 200 and the air guide grille 300 together guide the airflow from under the vehicle smoothly to the rear, avoiding airflow turbulence and increased wind resistance. At the same time, the drag-reducing and air-guiding device is compatible with the vehicle 100's existing rear suspension skid plate 120, rear bumper 130, and other components, eliminating the need for additional complex electronic control structures. This simplifies the vehicle 100's bottom layout, reduces manufacturing costs, and effectively balances the muffler 110's heat dissipation requirements with the vehicle 100's range, improving the vehicle 100's energy efficiency and overall reliability.

[0072] In some other embodiments, the vehicle 100 also includes a chassis, a passenger compartment, a power system, etc., which will not be listed here.

[0073] 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.

[0074] 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 resistance-reducing and flow-guiding device, characterized in that, include: The protective plate body is located below the muffler of the vehicle and is fixedly connected to the vehicle. The protective plate body is provided with an air inlet. An air guide grille, which is movably mounted on the air inlet; A drive unit connects the guard plate body and the air guide grille, the drive unit being configured to drive the air guide grille to switch between a first state of closing the air inlet and a second state of opening the air inlet.

2. The drag-reducing and flow-guiding device according to claim 1, characterized in that, One side of the air guide grille is rotatably connected to the guard plate body via a rotating shaft, and the other side is connected to the driving component, which is adapted to drive the air guide grille to rotate.

3. The drag-reducing and flow-guiding device according to claim 2, characterized in that, The air deflector grille is configured such that, in the second state, the side of the air deflector grille facing away from the rotation axis is located below the guard plate body and faces the front of the vehicle.

4. The drag-reducing and flow-guiding device according to claim 2 or 3, characterized in that, The air guide grille is configured such that, in the first state, the side of the air guide grille facing away from the rotation axis overlaps with the guard plate body.

5. The drag-reducing and flow-guiding device according to any one of claims 1 to 3, characterized in that, The protective plate body is provided with a receiving groove, and in the first state, the driving component is located in the receiving groove.

6. The drag-reducing and flow-guiding device according to any one of claims 1 to 3, characterized in that, The driving component includes a memory spring, one end of which is fixedly connected to the guard plate body and the other end is fixedly connected to the air guide grille.

7. The drag-reducing and flow-guiding device according to any one of claims 1 to 3, characterized in that, One side of the guard plate body is connected to the rear suspension guard plate of the vehicle, and / or, one side of the guard plate body is connected to the rear bumper of the vehicle.

8. The drag-reducing and flow-guiding device according to any one of claims 1 to 3, characterized in that, The guard plate body has at least one air vent on the side facing the rear of the vehicle.

9. The drag-reducing and flow-guiding device according to claim 8, characterized in that, It also includes a filter screen, which is disposed at the air outlet and / or the air inlet.

10. A vehicle, characterized in that, include: Muffler; as well as The resistance-reducing and flow-guiding device as described in any one of claims 1 to 9.

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