A tail wing device and an automobile thereof

Abstract

The present invention relates to the technical field of automotive spoilers, and discloses a spoiler device and an automobile thereof. The transmission assembly includes a bottom bracket, a top bracket, a driving link and a driven link. One ends of the driving link and the driven link are respectively rotatably connected to the bottom bracket, and the other ends of the driving link and the driven link are respectively rotatably connected to the top bracket. The top bracket is connected with a spoiler. A first driving shaft and a second driving shaft are arranged on one side of the driving link; The cam assembly includes a first cam and a second cam. The first cam and the second cam are rotatably installed on the bottom bracket, and the first cam is fixedly connected with the second cam. The driving assembly is respectively in transmission connection with the first cam and the second cam. A first cam side surface is formed on the outer periphery of the first cam, and the first driving shaft is arranged in abutting transmission connection with the first cam side surface. A second cam side surface is formed on the outer periphery of the second cam, and the second driving shaft is arranged in abutting transmission connection with the second cam side surface. The spoiler device and the automobile thereof according to the present invention improve the wind pressure bearing capacity.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive spoilers, and particularly to a spoiler device and an automobile thereof. Background Art

[0002] According to aerodynamics, when an automobile travels at a high speed, it will encounter a large air resistance, which has an adverse effect on the high-speed traveling automobile. In order to reduce the influence of the air resistance of the high-speed traveling automobile on the automobile, an electric spoiler is provided at the rear of the automobile to offset part of the lift force during high-speed traveling, reduce the wind resistance coefficient, and increase the adhesion of the automobile to the ground. However, the existing transmission structure of the automotive spoiler occupies a large space. At the same time, the automotive spoiler is prone to jitter during use, generating a large abnormal noise, having insufficient wind pressure bearing capacity, being prone to fracture, and having a short service life. Summary of the Invention

[0003] The purpose of the present invention is to provide a spoiler device to reduce the space occupied by the transmission structure of the automotive spoiler, avoid jitter of the automotive spoiler during use, and at the same time, improve the wind pressure bearing capacity.

[0004] To achieve the above object, the present invention provides a spoiler device and an automobile thereof, including a lifting component and a driving component, and the lifting component includes a transmission component and a cam component;

[0005] The transmission component includes a bottom bracket, a top bracket, a driving link and a driven link. One ends of the driving link and the driven link are respectively rotatably connected to the bottom bracket, and the other ends of the driving link and the driven link are respectively rotatably connected to the top bracket. The top bracket is connected with a spoiler, and a first driving shaft and a second driving shaft are arranged on one side of the driving link;

[0006] The cam component includes a first cam and a second cam. The first cam and the second cam are rotatably installed on the bottom bracket, the first cam is fixedly connected with the second cam, the driving component is respectively in transmission connection with the first cam and the second cam, a first cam side surface is formed on the outer periphery of the first cam, and the first driving shaft is arranged in abutting transmission connection with the first cam side surface. A second cam side surface is formed on the outer periphery of the second cam, and the second driving shaft is arranged in abutting transmission connection with the second cam side surface.

[0007] As a preferred solution, the driving link includes a link body. Two ends of the link body are respectively connected to the bottom bracket and the top bracket. The first driving shaft is connected between the two ends of the link body. A driving arm extends downward from one side of the middle of the link body. The second driving shaft is connected to the driving arm. The first cam and the second cam are located between the first driving shaft and the second driving shaft.

[0008] As a preferred solution, the second cam is located between the first cam and the driving link. The first driving shaft and the second driving shaft extend outward. The outer end of the first driving shaft is in abutting contact with the first cam, the inner end of the first driving shaft is in clearance fit with the second cam, the outer end of the second driving shaft is located inside the first cam, and the second driving shaft is in abutting contact with the second cam.

[0009] As a preferred solution, a spacing A is provided between the second cam and the driving link.

[0010] As a preferred solution, the cam assembly includes a connecting column. The connecting column is located between the first cam and the second cam. The first cam and the second cam are fixedly connected through the connecting column, and the connecting column is coaxially and drivably connected to the driving assembly.

[0011] As a preferred solution, the driving assembly includes a driving member and a transmission shaft. The driving member is in transmission connection with the transmission shaft. Two lifting assemblies are provided, and the two lifting assemblies are located on both sides of the driving member. The driving member is respectively coaxially and drivably connected to the two connecting columns through the transmission shaft. The two lifting assemblies are arranged in a mirror image, and the two lifting assemblies are respectively connected to both ends of the spoiler.

[0012] As a preferred solution, the driving link and the driven link are respectively connected to the same side of the top bracket.

[0013] As a preferred solution, the bottom bracket includes a driven connection seat, a driving connection seat and a transmission connection seat. The transmission connection seat is located between the driven connection seat and the driving connection seat. The lower end of the driven link is connected to the driven connection seat, the lower end of the driving link is connected to the driving connection seat, and the bottom bracket is provided with a transmission cavity. The first cam and the second cam are rotatably installed in the transmission cavity.

[0014] As a preferred solution, the lifting assembly includes a rising state and a falling state. When the lifting assembly is in the rising state, the first cam pushes the first driving shaft upward. When the lifting assembly is in the falling state, the second cam pushes the second driving shaft downward.

[0015] A vehicle includes a spoiler device and a vehicle body, and the spoiler device is installed at the rear of the vehicle body.

[0016] Compared with the prior art, the spoiler device and the vehicle according to the embodiments of the present invention have the following beneficial effects: The top bracket is used to connect with the spoiler to support the spoiler. The driving link, the driven link, the bottom bracket and the top bracket are rotatably connected to form a four-bar linkage. Through the movement of the four-bar linkage, the raising and lowering of the spoiler are realized. By raising the spoiler, the air downforce of the vehicle during driving is increased, so that the vehicle can drive more smoothly. When not in use, the spoiler descends to be flush with the vehicle body. The movement trajectory of the spoiler is controlled by the four-bar linkage. The first cam and the second cam are fixedly connected to form a conjugate cam. The driving link is connected with a first drive shaft and a second drive shaft. The first drive shaft is located above the first cam. By rotating the first cam, the first drive shaft is pushed upward. During the upward movement of the driving link, the second drive shaft is located below the second cam. By rotating the second cam downward, the second drive shaft is pushed downward. During the rising and falling of the driving link, the first drive shaft is in abutting transmission contact with the side surface of the first cam, and the second drive shaft is in abutting transmission contact with the side surface of the second cam, so that the entire lifting assembly is evenly stressed at any position during the lifting process, avoiding jitter of the vehicle spoiler during use. At the same time, the self-locking position is not limited, and the lifting assembly can hover at any position during the lifting process, and can withstand the same wind pressure. The user can arbitrarily adjust the angle of the spoiler, thereby adjusting the air downforce received by the vehicle. Different angles can also cooperate with the vehicle body to form different shapes, with a wide range of applications, improved wind pressure bearing capacity, and extended service life of the lifting assembly. The four-bar linkage formed by the rotatable connection of the driving link, the driven link, the bottom bracket and the top bracket and the conjugate cam formed by the fixed connection of the first cam and the second cam constitute the lifting assembly. While improving the wind pressure bearing capacity, it occupies a small space, which helps to miniaturize the spoiler device. At the same time, the side surfaces of the first cam and the second cam are exposed and not enclosed, so it is not easily affected by external sand and gravel, resulting in the jamming of the mechanism, ensuring the normal operation of the spoiler device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention.

[0018] Figure 2 is the connection structural schematic diagram of the transmission assembly and the driving assembly of the embodiment of the present invention.

[0019] Figure 3 is the structural schematic diagram of the lifting assembly of the embodiment of the present invention when it rises to the highest point.

[0020] Figure 4 is the structural schematic diagram of the lifting assembly of the embodiment of the present invention during the rising process.

[0021] Figure 5 is the structural schematic diagram of the initial state of the lifting assembly of the embodiment of the present invention.

[0022] Figure 6 It is a front view structural schematic diagram of the lifting component in an embodiment of the present invention.

[0023] Figure 7 It is a structural schematic diagram of the cam component in an embodiment of the present invention.

[0024] Figure 8 It is a structural schematic diagram of the bottom bracket in an embodiment of the present invention.

[0025] Figure 9 It is a structural schematic diagram of the driving link in an embodiment of the present invention.

[0026] In the figure:

[0027] 10. Lifting component;

[0028] 20. Transmission component; 21. Bottom bracket; 22. Driven connection seat; 23. Driving connection seat; 24. Transmission connection seat; 25. Transmission cavity; 26. Top bracket; 27. Driving link; 28. First driving shaft; 29. Second driving shaft; 30. Rotating ring; 31. Link body; 32. Driving arm; 33. Driven link;

[0029] 40. Cam component; 41. First cam; 42. First cam side; 43. Second cam; 44. Second cam side; 45. Connecting column;

[0030] 50. Driving component; 51. Driving part; 52. Transmission shaft;

[0031] 60. Turbulence plate; 61. Base; 62. Installation box; 63. Base bracket. Specific embodiments

[0032] The following combines the accompanying drawings and embodiments to further describe in detail the specific embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the present invention is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "connected", "connected to", "fixed", etc. used in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or a welded connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] As Figures 1 to 9 shown, a wing device of a preferred embodiment of the present invention includes a lifting assembly 10 and a driving assembly 50. The lifting assembly 10 includes a transmission assembly 20 and a cam assembly 40;

[0036] The transmission assembly 20 includes a bottom bracket 21, a top bracket 26, a driving link 27 and a driven link 33. One ends of the driving link 27 and the driven link 33 are respectively rotatably connected to the bottom bracket 21, and the other ends of the driving link 27 and the driven link 33 are respectively rotatably connected to the top bracket 26 to form a four-bar mechanism. The top bracket 26 is connected with a spoiler 60. A first driving shaft 28 and a second driving shaft 29 are arranged on one side of the driving link 27;

[0037] The cam assembly 40 includes a first cam 41 and a second cam 43. The first cam 41 and the second cam 43 are rotatably installed on the bottom bracket 21, and the first cam 41 and the second cam 43 are fixedly connected. The driving assembly 50 is respectively in transmission connection with the first cam 41 and the second cam 43. A first cam side surface 42 is formed on the outer periphery of the first cam 41, and the first driving shaft 28 is arranged in contact transmission with the first cam side surface 42. A second cam side surface 44 is formed on the outer periphery of the second cam 43, and the second driving shaft 29 is arranged in contact transmission with the second cam side surface 44.

[0038] A vehicle includes a wing device and a vehicle body, and the wing device is installed at the rear of the vehicle body.

[0039] The spoiler device of the present invention and the vehicle thereof. The top bracket 26 is used to connect with the spoiler 60 to support the spoiler 60. The driving link 27, the driven link 33, the bottom bracket 21 and the top bracket 26 are rotatably connected to form a four-bar linkage mechanism. Through the movement of the four-bar linkage mechanism, the raising and lowering of the spoiler 60 are realized. By raising the spoiler 60, the air downforce during the driving process of the vehicle is increased, making the vehicle drive more smoothly. When not in use, the spoiler 60 descends to be flush with the vehicle body. The movement trajectory of the spoiler 60 is controlled by the four-bar linkage mechanism. The first cam 41 and the second cam 43 are fixedly connected to form a conjugate cam. The driving link 27 is connected with a first driving shaft 28 and a second driving shaft 29. The first driving shaft 28 is located above the first cam 41. By rotating the first cam 41, the first driving shaft 28 is pushed upward. During the upward movement of the driving link 27, the second driving shaft 29 is located below the second cam 43. By rotating the second cam 43 downward, the second driving shaft 29 is pushed downward. During the rising and falling process of the driving link 27, the first driving shaft 28 is arranged in abutting transmission with the side surface 42 of the first cam, and the second driving shaft 29 is arranged in abutting transmission with the side surface 44 of the second cam. The side surface 42 of the first cam and the side surface 44 of the second cam form an anti-vibration bearing surface, so that the entire lifting assembly 10 is evenly stressed at any position during the lifting process, avoiding the tail wing of the vehicle from shaking during use. At the same time, the self-locking position is not limited, and the lifting assembly can hover at any position during the lifting process, and can withstand the same wind pressure. The user can arbitrarily adjust the angle of the tail wing, thereby adjusting the air downforce received by the vehicle. Different angles can also cooperate with the vehicle body to form different shapes, with a wide range of applications, improving the wind pressure bearing capacity, and extending the service life of the lifting assembly 10. The four-bar linkage mechanism formed by the rotatable connection of the driving link 27, the driven link 33, the bottom bracket 21 and the top bracket 26 and the conjugate cam formed by the fixed connection of the first cam 41 and the second cam 43 constitute the lifting assembly 10. While improving the wind pressure bearing capacity, it occupies a small space, which helps to miniaturize the spoiler device. At the same time, the sides of the first cam 41 and the second cam 43 are exposed and not enclosed, and are not easily affected by external sand and gravel, resulting in the jamming of the mechanism, ensuring the normal operation of the spoiler device.

[0040] Wherein, the shapes of the side surface 42 of the first cam and the side surface 44 of the second cam are set according to the movement trajectory of the four-bar linkage mechanism.

[0041] As one of the embodiments, as Figure 7 shown, the thickness of the first cam 41 is greater than the thickness of the second cam 43. The abutting area between the first driving shaft 28 and the first cam 41 is increased, and the wind pressure bearing capacity between the first cam 41 and the driving link 27 is increased.

[0042] As one embodiment, the first cam 41 and the second cam 43 are integrally formed as a whole, or the first cam 41 and the second cam 43 are assembled and connected by a connecting member to form a whole, where the connecting member includes but is not limited to bolts and / or shafts.

[0043] Furthermore, as Figure 9 shown, the driving link 27 includes a link body 31. Both ends of the link body 31 are respectively connected to the bottom bracket 21 and the top bracket 26. The first driving shaft 28 is connected between both ends of the link body 31. One side of the middle of the link body 31 extends downward to form a driving arm 32. The second driving shaft 29 is connected to the driving arm 32. The first cam 41 and the second cam 43 are located between the first driving shaft 28 and the second driving shaft 29. A anti-vibration pressure-bearing area is formed between the first driving shaft 28 and the second driving shaft 29. The conjugate cams formed by the first cam 41 and the second cam 43 are installed in the anti-vibration pressure-bearing area to prevent the driving link 27 from shaking and improve the wind pressure bearing capacity of the driving link 27, thereby enhancing the structural stability of the lifting assembly 10. At the same time, by forming the anti-vibration pressure-bearing area through the downward extension of the link body 31 to form the driving arm 32, it helps to make the driving link 27 lighter.

[0044] As one embodiment, as Figure 3 shown, the second driving shaft 29 is connected to the lower end of the driving arm 32, which helps to form a larger anti-vibration pressure-bearing area with the driving link 27 in the case of a shorter driving arm 32, improving the space utilization rate and reducing the production cost.

[0045] Furthermore, as Figure 6 shown, in the width direction, the second cam 43 is located between the first cam 41 and the driving link 27. The first driving shaft 28 and the second driving shaft 29 extend outward. The outer end of the first driving shaft 28 is in abutting contact with the first cam 41, and the inner end of the first driving shaft 28 has a clearance fit with the second cam 43, that is, clearance is provided, to avoid interference between the first driving shaft 28 and the second cam 43. The outer end of the second driving shaft 29 is located inside the first cam 41 to avoid interference between the second driving shaft 29 and the first cam 41. The second driving shaft 29 is in abutting contact with the second cam 43, and the second cam 43 is in transmission connection with the second driving shaft 29.

[0046] As one embodiment, as Figure 3As shown, the outer ends of the first drive shaft 28 and the second drive shaft 29 are coaxially sleeved with rotating circles 30 respectively. The first drive shaft 28 is pressed against and matched with the first cam side surface 42 through the rotating circle 30. When the first cam 41 rotates, the rotating circle 30 on the first drive shaft 28 rotates relative to the first drive shaft 28; the second drive shaft 29 is pressed against and matched with the second cam side surface 44 through the rotating circle 30. When the second cam 43 rotates, the rotating circle 30 on the second drive shaft 29 rotates relative to the second drive shaft 29. The provision of the rotating circle 30 avoids direct relative friction between the first drive shaft 28 and the first cam 41, and direct relative friction between the second drive shaft 29 and the second cam 43, thereby extending the service life of the lifting assembly 10.

[0047] Further, such as Figure 6 As shown, a spacing A is provided between the second cam 43 and the driving connecting rod 27 to avoid interference when the second cam 43 and the driving connecting rod 27 move relative to each other, and the second cam 43 and the driving connecting rod 27 move more smoothly.

[0048] Further, such as Figure 7 As shown, the cam assembly 40 includes a connecting column 45, which is located between the first cam 41 and the second cam 43. The first cam 41 and the second cam 43 are fixedly connected through the connecting column 45, and the connecting column 45 is coaxially connected to the driving assembly 50. The first cam 41 and the second cam 43 are fixedly connected to form a conjugate cam through the connecting column 45, and at the same time, they are coaxially connected to the driving assembly 50 through the connecting column 45. A gap is provided between the first cam 41 and the second cam 43 through the connecting column 45, so that when the second driving shaft 29 abuts against the second cam side surface 44, interference with the first cam 41 is avoided.

[0049] As one embodiment, the first cam 41 and the second cam 43 are fixedly abutted against each other at opposite surfaces.

[0050] Further, such as Figure 2 As shown, the driving assembly 50 includes a driving member 51 and a transmission shaft 52, the driving member 51 is connected to the transmission shaft 52 by transmission, two lifting assemblies 10 are provided, the two lifting assemblies 10 are located on both sides of the driving member 51, the driving member 51 is connected to the two connecting columns 45 by coaxial transmission through the transmission shaft 52, the two lifting assemblies 10 are arranged in a mirror image, and the two lifting assemblies 10 are respectively connected to the two ends of the spoiler 60. One driving member 51 drives two lifting assemblies 10 at the same time, the transmission structure is simple, and the production cost is low. At the same time, the two ends of the spoiler 60 are driven by the lifting assemblies 10 respectively, which enhances the wind pressure resistance stability of the tail device.

[0051] As one embodiment, the driving member 51 is a motor.

[0052] Further, such as Figures 3 to 5As shown, the driving link 27 and the driven link 33 are respectively connected to the same side of the top bracket 26, optimizing the installation space of the top bracket 26 and leaving the installation space for the spoiler 60 on the other side of the top bracket 26. At the same time, due to the concentrated connection positions, the assembly efficiency of the driving link 27, the driven link 33 and the top bracket 26 is improved.

[0053] Further, as Figure 8 shown, the bottom bracket 21 includes a driven connection seat 22, a driving connection seat 23 and a transmission connection seat 24. The transmission connection seat 24 is located between the driven connection seat 22 and the driving connection seat 23. The lower end of the driven link 33 is connected to the driven connection seat 22, and the lower end of the driving link 27 is connected to the driving connection seat 23. The bottom bracket 21 is provided with a transmission cavity 25, and the first cam 41 and the second cam 43 are rotatably installed in the transmission cavity 25. The bottom bracket 21 provides a basic support for the lifting assembly 10, and realizes the installation and transmission connection of the driven link 33, the driving link 27 and the conjugate cams through the bottom bracket 21. The transmission cavity 25 provides an installation space for the conjugate cams.

[0054] Further, as Figures 3 to 5 shown, the lifting assembly 10 includes a rising state and a falling state. When the lifting assembly 10 is in the rising state, the first cam 41 pushes the first drive shaft 28 upward, causing the upper end of the driving link 27 to rotate upward, and driving the spoiler 60 to move upward and expose the vehicle body through the top bracket 26 to open the function of the tail wing. When the lifting assembly 10 is in the falling state, the second cam 43 pushes the second drive shaft 29 downward, causing the upper end of the driving link 27 to rotate downward, and driving the spoiler 60 to move downward and flush with the vehicle body or hidden in the vehicle body to realize the retraction of the tail wing.

[0055] As one of the embodiments, as Figure 1 shown, the tail wing device includes a base 61. The base 61 includes an installation box 62 with an upward opening and a base bracket 63. Both ends of the base bracket 63 are respectively connected to the installation box 62. The lifting assembly 10 is installed in the installation box 62, and the driving assembly 50 is connected to the base bracket 63. Through the base 61, the lifting assembly 10 and the driving assembly 50 are integrated, improving the structural stability of the tail wing device. The lifting assembly 10 is installed in the installation box 62 to prevent the lifting assembly 10 from interfering with other components and ensure the smooth movement of the lifting assembly 10.

[0056] The working process of the present invention is: as Figures 3 to 5As shown, when the spoiler 60 rises, the first cam 41 pushes the first drive shaft 28 upward, causing the upper end of the drive link 27 to rotate upward, and driving the spoiler 60 to move upward and expose the vehicle body through the top bracket 26. When the spoiler 60 descends, the second cam 43 pushes the second drive shaft 29 downward, causing the upper end of the drive link 27 to rotate downward, and driving the spoiler 60 to move downward and be flush with the vehicle body, or hidden inside the vehicle body. At the same time, the first drive shaft 28 always abuts against the side surface 42 of the first cam, and the second drive shaft 29 always abuts against the side surface 44 of the second cam.

[0057] In summary, the embodiment of the present invention provides a spoiler device and an automobile thereof. The top bracket 26 is used to connect with the spoiler 60 to support the spoiler 60. The drive link 27, the driven link 33, the bottom bracket 21 and the top bracket 26 are rotationally connected to form a four-bar linkage. Through the movement of the four-bar linkage, the raising and lowering of the spoiler 60 are realized. By raising the spoiler 60, the air downforce of the automobile during driving is increased, so that the automobile can drive more smoothly. When it is not needed, the spoiler 60 descends to be flush with the vehicle body. The movement trajectory of the spoiler 60 is controlled by the four-bar linkage. The first cam 41 and the second cam 43 are fixedly connected to form a conjugate cam. The drive link 27 is connected with a first drive shaft 28 and a second drive shaft 29. The first drive shaft 28 is located above the first cam 41. By rotating the first cam 41, the first drive shaft 28 is pushed upward. During the upward movement of the drive link 27, the second drive shaft 29 is located below the second cam 43. By rotating the second cam 43 downward, the second drive shaft 29 is pushed downward. During the rising and falling of the drive link 27, the first drive shaft 28 is arranged in abutting transmission with the side surface 42 of the first cam, and the second drive shaft 29 is arranged in abutting transmission with the side surface 44 of the second cam, so that the whole lifting assembly 10 is evenly stressed at any position during the lifting process, avoiding the shaking of the automobile spoiler during use. At the same time, the self-locking position is not limited, and the lifting process can hover at any position, and can withstand the same wind pressure. The user can arbitrarily adjust the angle of the spoiler, thereby adjusting the air downforce received by the automobile. Different angles can also cooperate with the vehicle body to form different shapes, with a wide range of applications. Furthermore, the wind pressure bearing capacity is improved, and the service life of the lifting assembly 10 is extended. The four-bar linkage formed by the rotational connection of the drive link 27, the driven link 33, the bottom bracket 21 and the top bracket 26 and the conjugate cam formed by the fixed connection of the first cam 41 and the second cam 43 constitute the lifting assembly 10. While improving the wind pressure bearing capacity, it occupies a small space, which helps to miniaturize the spoiler device. At the same time, the side surfaces of the first cam 41 and the second cam 43 are exposed and not enclosed, and are not easily affected by external sand and gravel, resulting in the jamming of the mechanism, ensuring the normal operation of the spoiler device.

[0058] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A fin device, characterized in that: it includes a lifting component and a driving component, and the lifting component includes a transmission component and a cam component; the transmission component includes a bottom bracket, a top bracket, a driving link and a driven link. One end of the driving link and the driven link are respectively rotatably connected to the bottom bracket, and the other end of the driving link and the driven link are respectively rotatably connected to the top bracket. The top bracket is connected with a spoiler, and a first driving shaft and a second driving shaft are arranged on one side of the driving link; the cam component includes a first cam and a second cam. The first cam and the second cam are rotatably installed on the bottom bracket, and the first cam is fixedly connected with the second cam. The driving component is respectively in transmission connection with the first cam and the second cam. A first cam side surface is formed on the outer periphery of the first cam, and the first driving shaft is arranged in abutting transmission contact with the first cam side surface. A second cam side surface is formed on the outer periphery of the second cam, and the second driving shaft is arranged in abutting transmission contact with the second cam side surface; the driving link includes a link body. The two ends of the link body are respectively connected to the bottom bracket and the top bracket. The first driving shaft is connected between the two ends of the link body. A driving arm extends downward from one side of the middle of the link body. The second driving shaft is connected to the driving arm. The first cam and the second cam are located between the first driving shaft and the second driving shaft; the second driving shaft is connected to the lower end of the driving arm.

2. The fin device according to claim 1, characterized in that: the second cam is located between the first cam and the driving link. The first driving shaft and the second driving shaft extend outward. The outer end of the first driving shaft is in abutting contact with the first cam, and the inner end of the first driving shaft has a clearance fit with the second cam. The outer end of the second driving shaft is located inside the first cam, and the second driving shaft is in abutting contact with the second cam.

3. The fin device according to claim 1, characterized in that: a distance A is provided between the second cam and the driving link.

4. The fin device according to claim 1, characterized in that: the cam component includes a connecting column. The connecting column is located between the first cam and the second cam. The first cam and the second cam are fixedly connected through the connecting column, and the connecting column is in coaxial transmission connection with the driving component.

5. The fin device according to claim 4, characterized in that: the driving component includes a driving member and a transmission shaft. The driving member is in transmission connection with the transmission shaft. Two lifting components are provided, and the two lifting components are located on both sides of the driving member. The driving member is respectively in coaxial transmission connection with the two connecting columns through the transmission shaft. The two lifting components are arranged in a mirror image, and the two lifting components are respectively connected to both ends of the spoiler.

6. The fin device according to claim 1, characterized in that: the driving link and the driven link are respectively connected to the same side of the top bracket.

7. The fin device according to claim 1, wherein: the bottom bracket includes a driven connection seat, a driving connection seat and a transmission connection seat. The transmission connection seat is located between the driven connection seat and the driving connection seat. The lower end of the driven link is connected to the driven connection seat, and the lower end of the driving link is connected to the driving connection seat. The bottom bracket is provided with a transmission cavity, and the first cam and the second cam are rotatably installed in the transmission cavity.

8. The fin device according to claim 1, wherein: the lifting assembly includes a rising state and a falling state. When the lifting assembly is in the rising state, the first cam pushes the first drive shaft upward. When the lifting assembly is in the falling state, the second cam pushes the second drive shaft downward.

9. An automobile, wherein: it includes a vehicle body and the fin device according to any one of claims 1-8, and the fin device is installed at the rear of the vehicle body.

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