Active noise reduction structure and vehicle

Abstract

The application relates to an active noise reduction structure and a vehicle, and belongs to the technical field of vehicle structures. The active noise reduction structure comprises a wind barrier body and a lifting driving unit. The wind barrier body is installed at a gap position between a front windshield of a vehicle body and a front engine cover plate of the vehicle body. An output end of the lifting driving unit is connected to the bottom of the wind barrier body. The length direction of the wind barrier body is parallel to the width direction of the vehicle body. When the wind barrier body is lifted to the highest position, the top surface of the wind barrier body is higher than the top edge of a rain wiper after the rain wiper is laid flat. The application at least solves the technical problem that the current exposed rain wiper design causes gas flow field disorder, forms a larger turbulent sound group around the front windshield, and significantly increases the noise source of the front windshield area. Meanwhile, when the vehicle is stationary, the wind barrier body is lowered to reduce the influence of the wind barrier body on the hard and tough appearance of the vehicle.

Description

Technical Field

[0001] This application relates to the field of vehicle structure technology, and in particular to an active noise reduction structure and vehicle. Background Technology

[0002] In the current market, the design concept of boxy vehicles usually emphasizes a rugged appearance. Their body shells feature a raised hood design and a large windshield angle. Correspondingly, these vehicles usually adopt an exposed wiper design to further enhance their rugged off-road visual effect.

[0003] However, this design has significant drawbacks at high speeds: the hood's surface design is not smooth enough, causing airflow separation. This separated airflow directly impacts the wiper area, leading to turbulent airflow and creating large turbulent sound clusters around the windshield. As the vehicle moves, these turbulent sound clusters continuously break up and couple, significantly increasing the noise level in the windshield area. This noise enters the vehicle, severely impacting the sound quality inside, hindering communication between passengers, and reducing driving comfort. Utility Model Content

[0004] This application at least partially solves the technical problem of significantly increased noise in the windshield area caused by the current exposed wiper design.

[0005] Therefore, this application aims to provide an active noise reduction structure and vehicle, in which a retractable windshield is installed in the gap between the windshield and the hood of the vehicle body to change the airflow direction in front of the wipers, preventing the airflow from directly impacting the wipers when the vehicle is in motion and reducing noise sources at the windshield. Simultaneously, when the vehicle is stationary, the windshield is lowered to reduce its impact on the vehicle's rugged appearance.

[0006] To achieve the above objectives, in a first aspect, this application provides an active noise reduction structure, comprising: a windshield and a lifting drive unit; the windshield is installed in the gap between the windshield and the hood of the vehicle body, and the output end of the lifting drive unit is connected to the bottom of the windshield; the length direction of the windshield is parallel to the width direction of the vehicle body; when the windshield is raised to its highest position, the top surface of the windshield is higher than the top edge of the windshield wiper after it is laid flat.

[0007] In this technical solution, a retractable windshield is installed in the gap between the windshield and the hood of the vehicle. This alters the airflow direction in front of the wipers, preventing direct airflow impact on the wipers while the vehicle is in motion. This addresses, to some extent, the technical problem of turbulent airflow caused by exposed wiper designs, which creates large turbulent sound clusters around the windshield and significantly increases noise levels in the windshield area. Furthermore, when the vehicle is stationary, the windshield is lowered to reduce its impact on the vehicle's rugged exterior design.

[0008] In some embodiments of this application, multiple lifting drive units are provided along the length of the windbreak dam.

[0009] In the technical solution, multiple lifting drive units distribute the load along the length of the windbreak dam, reducing the tilting or swaying caused by uneven force on a single point of the windbreak dam, improving the wind-guiding stability of the windbreak dam, and ensuring the effect of the windbreak dam in reducing noise sources in the windshield area under strong airflow conditions.

[0010] In some embodiments of this application, the lifting drive unit includes a motor and a drive stud, the output end of the motor is connected to the drive stud, the windbreak dam body has a threaded hole for the drive stud, and the drive stud is inserted into the threaded hole from below the windbreak dam body and threadedly engaged with the windbreak dam body.

[0011] In the technical solution, the drive stud is threadedly engaged with the windbreak dam body. The rotation of the drive stud realizes the raising and lowering of the windbreak dam body, which can improve the height positioning accuracy of the windbreak dam body, reduce the possibility of the windbreak dam body vibrating and falling under strong airflow conditions, improve the wind guiding stability of the windbreak dam body, and ensure the effect of the windbreak dam body in reducing the noise source in the front windshield area under strong airflow conditions.

[0012] In some embodiments of this application, the threaded hole is disposed on the bottom surface of the windbreak dam body, and a buffer cavity is also disposed inside the windbreak dam body. The bottom surface of the buffer cavity is connected to the top surface of the threaded hole, and the diameter of the buffer cavity is larger than the major diameter of the threaded hole.

[0013] In the technical solution, the top of the threaded hole is sealed, which helps reduce the possibility of turbulent sound clusters forming at the top of the windbreak dam, thus reducing the noise source at the windbreak dam. The buffer cavity can reduce the resistance encountered by the windbreak dam when it descends.

[0014] In some embodiments of this application, the active noise reduction structure further includes a guide unit corresponding to the lifting drive unit. The guide unit includes a limiting bracket and guide posts, and a plurality of guide posts are fixed to the limiting bracket. The bottom end of the drive stud passes through the limiting bracket and is rotatably connected to the limiting bracket. The windbreak dam body is provided with a sliding groove corresponding to the guide post, and each guide post is inserted into the corresponding sliding groove from below the windbreak dam body and slides in the sliding groove. The sliding groove is provided on the bottom surface of the windbreak dam body.

[0015] In the technical solution, the guide post is used to limit the lifting direction of the windbreak dam body by the drive stud, thereby reducing the tilting or swaying caused by uneven force on a single point of the windbreak dam body.

[0016] In some embodiments of this application, the drive stud is provided with a limiting structure, and the limiting bracket abuts against the bottom surface of the limiting structure.

[0017] In the technical solution, the limiting structure is used to limit the position of the limiting bracket in the axial direction of the drive stud, thereby improving the assembly efficiency of the active noise reduction structure.

[0018] In some embodiments of this application, a plurality of guide posts are evenly distributed around the lifting drive unit, and the guide posts are parallel to the driving direction of the lifting drive unit.

[0019] In the technical solution, multiple guide columns are evenly distributed around the lifting drive unit, which helps to evenly distribute the load borne by the windbreak dam body and improve the reliability of the active noise reduction structure in strong airflow.

[0020] In some embodiments of this application, the top edge of the windbreak dam body is a rounded corner structure, and the top surface of the windbreak dam body is a plane.

[0021] In the technical solution, the top wall surface of the windbreak dam is smooth, which helps reduce the possibility of turbulent sound clusters forming at the top of the windbreak dam and reduces noise sources at the windbreak dam. The top edge of the windbreak dam has a rounded corner structure, which can also reduce the possibility of local stress concentration and subsequent damage to the windbreak dam when it collides with objects.

[0022] Secondly, this application provides a vehicle in which a mounting groove is provided between the windshield and the front hood of the vehicle body, and the aforementioned active noise reduction structure is installed in the mounting groove.

[0023] In this technical solution, a retractable windshield is installed in the gap between the windshield and the hood of the vehicle to change the airflow direction in front of the wipers, preventing the airflow from directly impacting the wipers while the vehicle is in motion. This application provides a vehicle that can reduce noise sources at the windshield while having minimal impact on the vehicle's rugged appearance when stationary.

[0024] In some embodiments of this application, the vehicle further includes a sealing edge mounted on the top edge of the mounting groove, the top surface of the windbreak body being higher than the top edge of the mounting groove; the gap between the windbreak body and the top edge of the mounting groove is sealed by the sealing edge.

[0025] In the technical solution, the sealing edge helps reduce the possibility of airflow entering the gap between the top edge of the windbreak and the mounting groove during vehicle operation, and helps reduce the noise source at the windbreak.

[0026] As can be seen from the above technical solutions, additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application.

[0027] The beneficial effects of the active noise reduction structure and vehicle provided in this application include at least the following: 1. This application proposes an active noise reduction structure and vehicle. By installing a retractable windshield dam in the gap between the windshield and the hood, the airflow direction in front of the wipers is altered, preventing direct airflow impact on the wipers while the vehicle is in motion. This addresses, to some extent, the technical problem of turbulent airflow caused by exposed wiper designs, which leads to the formation of large turbulent sound clusters around the windshield and significantly increases noise levels in the windshield area. Simultaneously, when the vehicle is stationary, the windshield dam is lowered to reduce its impact on the vehicle's rugged exterior design.

[0028] 2. By means of threaded engagement between the drive stud and the windbreak dam body, sealing the top of the threaded hole, setting the guide post to limit the lifting direction, and setting the sealing edge between the windbreak dam body and the mounting groove, the noise source at the windbreak dam body is reduced. Attached Figure Description

[0029] Figure 1 This is an installation diagram of the active noise reduction structure according to an embodiment of this application; Figure 2 This is a schematic diagram of an active noise reduction structure according to an embodiment of this application, omitting the motor. Figure 1 ; Figure 3 This is a schematic diagram of an active noise reduction structure according to an embodiment of this application, omitting the motor. Figure 2 ; Figure 4 This is a cross-sectional view of the windbreak dam body in the active noise reduction structure according to the embodiments of this application; Figure 5 This is a schematic diagram of the active noise reduction structure driving stud and limiting structure according to the embodiments of this application; Figure 6 This is a schematic diagram of the guiding unit in the active noise reduction structure according to an embodiment of this application.

[0030] In the above figures: 1. Windbreak body; 11. Threaded hole; 12. Slide groove; 13. Buffer cavity; 2. Drive stud; 21. Threaded section; 22. Limiting ring; 23. Mounting section; 24. Connecting section; 25. Relief groove; 26. Annular groove; 27. Active keyway; 31. Limiting bracket; 32. Guide post; 311. Annular plate; 312. Guide sleeve; 4. Lower limit component; 5. Mounting groove; 6. Sealing edge; 7. Wiper; 8. Front windshield. Detailed Implementation

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between 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. In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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. In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0032] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments. It should be noted that in the field of vehicles, the design concept of boxy models usually emphasizes a rugged appearance. Their body shells have features such as a raised hood design and a large windshield angle. Correspondingly, these models usually adopt an exposed windshield wiper design to further enhance their rugged off-road visual effect.

[0033] In existing technologies, the hood's surface design is not smooth enough, causing airflow separation during transition. This separated airflow directly impacts the wiper area, leading to turbulent airflow and the formation of large turbulent sound clusters around the windshield. As the vehicle moves, these turbulent sound clusters continuously break up and couple, significantly increasing the noise source in the windshield area. This noise enters the vehicle, severely affecting the sound quality inside, hindering communication between passengers, and reducing driving comfort.

[0034] Based on this, this application proposes an active noise reduction structure and vehicle. By installing a retractable windshield dam in the gap between the windshield and the hood, the airflow direction in front of the wipers is altered, preventing direct airflow impact on the wipers while the vehicle is in motion. This addresses, to some extent, the technical problem of turbulent airflow caused by current exposed wiper designs, which leads to the formation of large turbulent sound clusters around the windshield and a significant increase in noise in the windshield area. Simultaneously, when the vehicle is stationary, the windshield dam is lowered to reduce its impact on the vehicle's rugged exterior design.

[0035] In the following, embodiments of this application will be described in detail with reference to the accompanying drawings.

[0036] As attached Figures 1 to 6 As shown in an illustrative embodiment of the active noise cancellation structure and vehicle of this application, the active noise cancellation structure includes: a windshield 1 and a lifting drive unit; the windshield 1 is slidably installed in the gap between the windshield 8 of the vehicle body and the front engine hood of the vehicle body, and the output end of the lifting drive unit is connected to the bottom of the windshield 1; the length direction of the windshield 1 is parallel to the width direction of the vehicle body; when the windshield 1 is raised to its highest position, the top surface of the windshield 1 is higher than the top edge of the wiper 7 of the vehicle body after it is flattened.

[0037] In this technical solution, by installing a retractable windshield dam 1 in the gap between the windshield 8 and the hood, the airflow direction in front of the wiper 7 is altered, preventing direct airflow impact on the wiper 7 while the vehicle is in motion. This addresses, to some extent, the technical problem of turbulent airflow caused by the current exposed wiper 7 design, which creates large turbulent sound clusters around the windshield 8, leading to a significant increase in noise in the windshield area. Simultaneously, when the vehicle is stationary, lowering the windshield dam 1 reduces its impact on the vehicle's rugged exterior design.

[0038] In some embodiments of this application, multiple lifting drive units are arranged along the length of the windbreak dam body 1.

[0039] In the technical solution, multiple lifting drive units distribute the load along the length of the windbreak dam 1, reducing the tilting or swaying caused by uneven force on a single point of the windbreak dam 1, improving the wind-guiding stability of the windbreak dam 1, and ensuring the effect of the windbreak dam 1 in reducing the noise source in the front windshield area under strong airflow conditions.

[0040] In some embodiments of this application, the lifting drive unit includes a motor and a drive stud 2. The output end of the motor is connected to the drive stud 2. The windbreak dam 1 has a threaded hole 11 for the drive stud 2. The drive stud 2 is inserted into the threaded hole 11 from below the windbreak dam 1 and is threadedly engaged with the windbreak dam 1.

[0041] In the technical solution, the drive stud 2 is threadedly engaged with the windbreak dam 1. The windbreak dam 1 is raised and lowered by rotating the drive stud 2, which can improve the height positioning accuracy of the windbreak dam 1, reduce the possibility of the windbreak dam 1 vibrating and falling under strong airflow conditions, improve the wind guiding stability of the windbreak dam 1, and ensure the effect of the windbreak dam 1 in reducing the noise source in the front windshield area under strong airflow conditions.

[0042] Furthermore, both the top edge of the drive bolt and the bottom edge of the threaded hole 11 are provided with a chamfered structure so that the drive bolt can be assembled into the threaded hole 11.

[0043] In some embodiments of this application, the threaded hole 11 is disposed on the bottom surface of the windbreak dam body 1, and a buffer cavity 13 is also disposed inside the windbreak dam body 1. The bottom surface of the buffer cavity 13 is connected to the top surface of the threaded hole 11, and the diameter of the buffer cavity 13 is larger than the major diameter of the threaded hole 11.

[0044] In the technical solution, the top of the threaded hole 11 is closed, which helps to reduce the possibility of turbulent sound clusters forming at the top of the windbreak dam 1 and reduces the noise source at the windbreak dam 1. The buffer cavity 13 can reduce the resistance encountered by the windbreak dam 1 when it descends.

[0045] Furthermore, the height of the buffer cavity 13 is less than the height of the threaded hole 11 to ensure the structural strength of the windbreak dam body 1.

[0046] Furthermore, the inner edge of the buffer cavity 13 is provided with a rounded corner structure.

[0047] In some embodiments of this application, the active noise reduction structure further includes a guide unit corresponding to the lifting drive unit. The guide unit includes a limiting bracket 31 and guide posts 32, and a plurality of guide posts 32 are fixed to the limiting bracket 31. The bottom end of the drive stud 2 passes through the limiting bracket 31 and is rotatably connected to the limiting bracket 31. The windbreak dam 1 is provided with a sliding groove 12 corresponding to the guide posts 32. Each guide post 32 is inserted into the corresponding sliding groove 12 from below the windbreak dam 1 and slides in the sliding groove 12. The sliding groove 12 is provided on the bottom surface of the windbreak dam 1.

[0048] In the technical solution, the guide post 32 is used to limit the lifting direction of the windbreak dam body 1 by the drive stud 2, thereby reducing the tilting or swaying caused by uneven force on a single point of the windbreak dam body 1.

[0049] Furthermore, there is a gap between the inner wall of the slide 12 and the guide post 32 to reduce the friction between the guide post 32 and the windbreak dam 1, reduce the resistance encountered by the windbreak dam 1 during lifting and lowering, and reduce the energy consumption of the motor.

[0050] In some embodiments of this application, the drive stud 2 is provided with a limiting structure, and the limiting bracket 31 abuts against the bottom surface of the limiting structure.

[0051] In the technical solution, the limiting structure is used to limit the position of the limiting bracket 31 in the axial direction of the driving stud 2, thereby improving the assembly efficiency of the active noise reduction structure.

[0052] Furthermore, the limiting structure is a limiting ring 22 that is collinear with the axis of the driving stud 2.

[0053] In some embodiments of this application, the drive stud 2 is an integrally formed structure, comprising, in sequence, a threaded section 21 with collinear axes, a limiting ring 22, a mounting section 23, and a connecting section 24, wherein the connecting section 24 is connected to the motor. The limiting bracket 31 includes an annular plate 311 and a guide sleeve 312 formed on the bottom surface of the annular plate 311, wherein the inner diameters of the annular plate 311 and the guide sleeve 312 are the same. The guide sleeve 312 is fitted onto the mounting section 23, and the annular plate 311 abuts against the bottom surface of the limiting ring 22.

[0054] Furthermore, an annular relief groove 25 is provided between the threaded segment 21 and the limiting ring 22, and the buffer cavity 13 can be used as the relief groove 25 for the threaded hole 11. The thread of the threaded segment 21 and the threaded hole 11 are machined by a lathe to improve the accuracy of the threaded segment 21 and the threaded hole 11, reduce the roughness of the threaded segment 21 and the threaded hole 11, reduce the frictional resistance between the threaded segment 21 and the windbreak dam 1, and reduce the energy consumption of the motor.

[0055] Furthermore, the height of the threaded section 21 is greater than the height from the top surface of the buffer cavity 13 to the bottom edge of the threaded hole 11.

[0056] In some embodiments of this application, the active noise reduction structure further includes a lower limiting member 4 detachably mounted on the drive stud 2, and the limiting bracket 31 is located between the limiting structure and the lower limiting member 4.

[0057] Furthermore, the lower limiting member 4 is a spring washer with an opening, and an annular groove 26 is provided at the bottom of the mounting section 23. The spring washer is engaged in the annular groove 26 to prevent the limiting bracket 31 from disengaging from the driving stud 2.

[0058] In some embodiments of this application, the connecting segment 24 is detachably connected to the driven gear, and the output shaft of the motor 21 is detachably connected to the driving gear, wherein the driving gear and the driven gear mesh.

[0059] Furthermore, the output shaft of the motor and the drive gear are provided with matching drive keyways 27, and the lifting drive unit also includes a drive connection key, which is embedded in the two drive keyways 27 to realize the connection between the motor and the drive gear.

[0060] Furthermore, the driven gear and the connecting section 24 are provided with matching driven keyways, and the lifting drive unit also includes a driven connecting key, which is embedded in the two driven keyways to realize the connection between the connecting section 24 and the driven gear.

[0061] In some embodiments of this application, the diameter of the connecting section 24 is smaller than the diameter of the mounting section 23 to form an axial position for the motor or the coupling structure.

[0062] In some embodiments of this application, a plurality of guide posts 32 are evenly distributed around the lifting drive unit, and the guide posts 32 are parallel to the driving direction of the lifting drive unit.

[0063] In the technical solution, multiple guide columns 32 are evenly distributed around the lifting drive unit, which helps to evenly distribute the load borne by the windbreak dam 1 and improve the reliability of the active noise reduction structure in strong airflow.

[0064] Furthermore, the guide post 32 is cylindrical to facilitate quick assembly to the windbreak dam body 1, while also reducing wear on the windbreak dam body 1 caused by the guide post 32.

[0065] In some embodiments of this application, the top edge of the windbreak dam 1 has a rounded corner structure, and the top surface of the windbreak dam 1 is a plane.

[0066] In the technical solution, the top wall surface of the windbreak dam 1 is smooth, which helps to reduce the possibility of turbulent sound clusters forming at the top of the windbreak dam 1 and reduces the noise source at the windbreak dam 1. The top edge of the windbreak dam 1 has a rounded corner structure, which can also reduce the possibility of local stress concentration and subsequent damage to the windbreak dam 1 when it collides with objects.

[0067] In some embodiments of this application, the dimensions of the limiting bracket 31 and the motor are both smaller than the dimensions of the windshield 1 in the length direction of the vehicle body. In the width direction of the vehicle body, the dimensions of the limiting bracket 31 and the motor are both smaller than the dimensions of the windshield 1. This structural limitation prevents the limiting bracket 31 and the motor from interfering with the installation of the windshield 1 on the vehicle body.

[0068] Secondly, this application provides a vehicle in which a mounting groove 5 is provided between the windshield 8 of the vehicle body and the front engine hood, and the active noise reduction structure described in any of the above embodiments or any combination of embodiments is installed in the mounting groove 5.

[0069] In the technical solution, a retractable windshield dam 1 is installed in the gap between the windshield 8 and the hood of the vehicle to change the airflow direction in front of the wiper 7, preventing the airflow from directly impacting the wiper 7 when the vehicle is in motion and reducing the noise source at the windshield 8. This application provides a vehicle that can reduce the noise source at the windshield while having minimal impact on the vehicle's rugged appearance when the vehicle is stationary.

[0070] In some embodiments of this application, the vehicle further includes a sealing edge 6 mounted on the top edge of the mounting groove 5, and the top surface of the windbreak body 1 is higher than the top edge of the mounting groove 5; the gap between the windbreak body 1 and the top edge of the mounting groove 5 is sealed by the sealing edge 6. The sealing edge 6 is made of an elastic material, such as rubber.

[0071] In the technical solution, the sealing edge 6 helps to reduce the possibility of airflow entering the gap between the top edge of the windbreak body 1 and the mounting groove 5 during vehicle operation, and helps to reduce the noise source at the windbreak body 1.

[0072] Furthermore, the sealing edge 1 can be snapped and / or glued to the vehicle body to improve the connection reliability between the sealing edge 6 and the vehicle body.

[0073] Furthermore, when the windshield dam 1 is at its lowest point, the height difference between the top surface of the windshield dam 1 and the front hood is less than 1 cm, so as to reduce the impact of the windshield dam 1 on the vehicle's rugged appearance when the vehicle is stationary.

[0074] Furthermore, when the drive dam body 1 is at its highest point, the height difference between the top surface of the drive dam body 1 and the top edge of the wiper 7 after it is laid flat is greater than 1 cm.

[0075] The preferred embodiment of the active noise cancellation structure in this application is installed as follows: A mounting groove 5 is provided in the gap between the windshield 8 and the front hood of the vehicle body. The windshield dam 1, the guide unit, the drive stud 2, and the lower limit member 4, all having the features described in the above embodiments, are installed in the mounting groove 5. A motor connected to the drive stud 2 is also installed in the mounting groove 5. A sealing edge 6 is installed on the top edge of the mounting groove 5, and the top surface of the windshield dam 1 is always higher than the top edge of the mounting groove 5.

[0076] The preferred embodiment of the active noise reduction structure in this application operates as follows: all the motors synchronously drive the corresponding drive studs 2 to rotate, thereby driving the windbreak dam body 1 to rise and fall.

[0077] When the vehicle is stationary, the windshield 1 is at its lowest point, reducing the impact of the windshield on the vehicle's rugged appearance and preventing damage to the windshield 1 structure from collisions with external objects.

[0078] When the vehicle is in motion, all the motors synchronously drive the corresponding drive studs 2 to rotate, thereby raising the windshield dam 1 until the height of the top surface of the drive dam 1 is higher than the top surface of the windshield dam 1 and higher than the top edge of the windshield wiper 7 after it is laid flat.

[0079] Through the description of several embodiments of the active noise cancellation structure and vehicle provided in this application, it can be seen that the embodiments of the active noise cancellation structure and vehicle provided in this application have at least the following advantages: 1. This application proposes an active noise reduction structure and vehicle. By installing a retractable windshield dam in the gap between the windshield and the hood, the airflow direction in front of the wipers is altered, preventing direct airflow impact on the wipers while the vehicle is in motion. This addresses, to some extent, the technical problem of turbulent airflow caused by exposed wiper designs, which leads to the formation of large turbulent sound clusters around the windshield and significantly increases noise levels in the windshield area. Simultaneously, when the vehicle is stationary, the windshield dam is lowered to reduce its impact on the vehicle's rugged exterior design.

[0080] 2. By means of threaded engagement between the drive stud and the windbreak dam body, sealing the top of the threaded hole, setting the guide post to limit the lifting direction, and setting the sealing edge between the windbreak dam body and the mounting groove, the noise source at the windbreak dam body is reduced.

[0081] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An active noise reduction structure, characterized in that, It includes: windbreak Dam body (1) and lifting drive unit; The windshield (1) is installed in the gap between the windshield (8) and the front hood of the vehicle body. The output end of the lifting drive unit is connected to the bottom of the windshield (1). The length of the windshield (1) is parallel to the width of the vehicle body. When the windshield (1) is raised to its highest position, the top surface of the windshield (1) is higher than the top edge of the wiper (7) after it is laid flat.

2. The active noise reduction structure according to claim 1, characterized in that, Multiple lifting drive units are arranged along the length of the windbreak dam body (1).

3. The active noise reduction structure according to claim 2, characterized in that, The lifting drive unit includes a motor and a drive stud (2). The output end of the motor is connected to the drive stud (2). The windbreak dam (1) has a threaded hole (11) for the drive stud (2). The drive stud (2) is inserted into the threaded hole (11) from below the windbreak dam (1) and is threadedly engaged with the windbreak dam (1).

4. The active noise reduction structure according to claim 3, characterized in that, The threaded hole (11) is provided on the bottom surface of the windbreak dam body (1). A buffer cavity (13) is also provided inside the windbreak dam body (1). The bottom surface of the buffer cavity (13) is connected to the top surface of the threaded hole (11). The diameter of the buffer cavity (13) is larger than the major diameter of the threaded hole (11).

5. The active noise reduction structure according to claim 3, characterized in that, It also includes a guide unit corresponding to the lifting drive unit. The guide unit includes a limiting bracket (31) and a guide column (32). A plurality of the guide columns (32) are fixed to the limiting bracket (31). The bottom end of the drive stud (2) passes through the limiting bracket (31) and is rotatably connected to the limiting bracket (31). The windbreak dam (1) is provided with a sliding groove (12) corresponding to the guide column (32). Each guide column (32) is inserted into the corresponding sliding groove (12) from below the windbreak dam (1) and slides in the sliding groove (12). The sliding groove (12) is provided on the bottom surface of the windbreak dam (1).

6. The active noise reduction structure according to claim 5, characterized in that, The drive stud (2) is provided with a limiting structure, and the limiting bracket (31) abuts against the bottom surface of the limiting structure.

7. The active noise reduction structure according to claim 5, characterized in that, Multiple guide posts (32) are evenly distributed around the lifting drive unit, and the guide posts (32) are parallel to the driving direction of the lifting drive unit.

8. The active noise reduction structure according to any one of claims 1 to 7, characterized in that; The top edge of the windbreak dam (1) has a rounded corner structure, and the top surface of the windbreak dam (1) is a plane.

9. A vehicle, characterized in that, An installation groove (5) is provided between the windshield (8) of the vehicle body and the front engine hood of the vehicle body, and an active noise reduction structure as described in any one of claims 1 to 8 is installed in the installation groove (5).

10. The vehicle according to claim 9, characterized in that, It also includes a sealing edge (6) installed on the top edge of the mounting groove (5), the top surface of the windbreak dam (1) being higher than the top edge of the mounting groove (5); the gap between the top edge of the windbreak dam (1) and the mounting groove (5) is sealed by the sealing edge (6).

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