Resin particle conveying device for removing wool tops and batting

By combining the conveying components, the speed transmission components, and the anti-caking mechanism, the problem of caking in the resin granule conveying device is solved, and the processing efficiency and quality of lint removal are improved.

CN121493515AInactive Publication Date: 2026-02-10HEBEI CHENKUO CONSTRUCTION ENGINEERING CO LTD
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Patent Information

Application Number
CN202511531304.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-24
Publication Date
2026-02-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention is suitable for the technical field of material conveying, and provides a resin particle conveying device for removing wool tops and batting, comprising: a conveying pipe, two ends of the conveying pipe are respectively provided with a feed port and a discharge port, the feed port and the discharge port are respectively provided with a feed hopper and a discharge pipe, and the discharge pipe is communicated with wool top and batting removing equipment; the conveying assembly is located in the conveying pipe, and a driving module used for driving the conveying assembly to rotate is arranged at the end of the conveying pipe; the conveying assembly is arranged on the end portion of the conveying pipe, the anti-blocking mechanism is located in the conveying assembly, and a variable speed transmission assembly used for achieving power transmission between the conveying assembly and the anti-blocking mechanism is further arranged on the end portion of the conveying pipe. And the conveying quality is effectively improved, so that the effect of removing wool tops and batting is improved.
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Description

Technical Field

[0001] This invention relates to the field of material conveying technology, specifically to a resin particle conveying device for removing lint and fibers. Background Technology

[0002] In the manufacturing industries of textiles, apparel, and home furnishings, lint and fiber removal is a crucial process for ensuring product quality. This process typically utilizes the adsorption, friction, or chemical reaction properties of resin particles to efficiently remove residual lint and fiber debris from the fabric surface. This improves surface smoothness, reduces subsequent processing defects, and minimizes the impact of floating lint on the production environment and the health of operators. As the core processing medium, the stability, precision, and cleanliness of the resin particle conveying process directly determine the processing efficiency, cost control, and final effect of the lint and fiber removal process. Therefore, resin particle conveying devices are one of the core auxiliary equipment in such production lines.

[0003] Currently, the industry mainly relies on traditional mechanical conveying systems, such as screw conveyors, belt conveyors, or pneumatic conveying devices, for conveying resin granules used to remove lint and fuzz. However, in practical applications, these existing devices often encounter the problem of resin granule clumping. The specific surface area (surface area per unit mass of granules) of clumped granules is only 1 / 3 to 1 / 5 of that of normal granules, which significantly weakens their ability to adsorb lint and fuzz, seriously affecting the lint removal effect.

[0004] Therefore, in view of the above situation, there is an urgent need to provide a resin particle conveying device for removing lint and fibers, so as to overcome the shortcomings in current practical applications. Summary of the Invention

[0005] The purpose of this invention is to provide a resin particle conveying device for removing lint and fibers, thereby solving the problems mentioned in the background art.

[0006] This invention is implemented as follows: a resin particle conveying device for removing lint and fuzz, comprising:

[0007] The conveying pipe has an inlet and an outlet at its two ends, and an inlet funnel and an outlet pipe are respectively provided on the inlet and outlet. The outlet pipe is connected to the lint removal equipment.

[0008] A conveying assembly is located inside a conveying pipe, and a drive module for rotating the conveying assembly is provided at the end of the conveying pipe.

[0009] The conveying pipe also includes an anti-caking mechanism located within the conveying assembly, and a speed-changing transmission assembly for transmitting power between the conveying assembly and the anti-caking mechanism is provided at the end of the conveying pipe.

[0010] As a further aspect of the present invention: the conveying assembly includes:

[0011] The spiral blades are located inside the conveying pipe, and multiple sets of connecting pipes are fixedly installed at equal intervals inside the spiral blades;

[0012] And a rotating pipe 1 is rotatably installed at both ends of the conveying pipe. The rotating pipe 1 is fixedly connected to the connecting pipe located at the end, and the rotating pipe 1 located at one end of the conveying pipe is connected to the drive module.

[0013] As a further aspect of the present invention: the anti-caking mechanism includes:

[0014] Rotate the second rotating pipe installed inside the first rotating pipe, the second rotating pipe passing through multiple sets of connecting pipes;

[0015] And an anti-caking assembly fixedly installed on the second rotating pipe, wherein the anti-caking assembly is located between two adjacent sets of connecting pipes, and multiple sets of anti-caking assemblies are provided.

[0016] As a further aspect of the present invention: the transmission assembly includes:

[0017] A drive gear one is fixedly mounted on a rotating tube one.

[0018] A rotating shaft is rotatably mounted at the end of the conveying pipe, and a driven gear is fixedly mounted on the rotating shaft to mesh with a drive gear.

[0019] And a linkage component one, which is used for power transmission between the rotating tube two and the rotating shaft one.

[0020] As a further aspect of the present invention: the pitch circle diameter of the first driving gear is larger than the pitch circle diameter of the first driven gear.

[0021] As a further aspect of the present invention: the anti-caking component includes:

[0022] A rotating column is fixedly installed on the rotating pipe 2, and multiple sets of guide channels connected to the rotating pipe 2 are opened inside the rotating column;

[0023] The mounting slots are provided on the rotating column, and there are multiple sets of mounting slots, with each set of mounting slots containing a flow-disrupting module.

[0024] As a further aspect of the present invention: the turbulence module includes:

[0025] A support shaft is fixedly installed in the mounting groove of the rotating column, and a baffle block is rotatably installed on the support shaft;

[0026] A cylinder for driving the spoiler block to rotate around the support shaft, with support seats rotatably connected to both ends of the cylinder, one of which is fixedly installed on the side wall of the mounting groove, and the other support seat is fixedly connected to the spoiler block.

[0027] Conduit 2, which is used for connecting the cylinder and the flow channel 1;

[0028] And a pressure relief unit for releasing gas from the cylinder.

[0029] As a further aspect of the present invention: the pressure relief unit includes:

[0030] A pressure relief chamber and a control chamber are provided within the turbulence block, and the pressure relief chamber and the control chamber are connected by a flow guiding channel provided within the turbulence block;

[0031] Catheter 1, which is used for communication between catheter 2 and the control cavity;

[0032] A piston plate is slidably installed in a control cavity, and a spring is provided in the control cavity for elastically pressing the piston plate. The connection between the first conduit and the control cavity is located below the piston plate, and the connection between the second guide channel and the control cavity is located above the piston plate.

[0033] And jet holes opened on the side wall of the turbulence block, the jet holes being connected to the pressure relief chamber.

[0034] As a further aspect of the present invention: the turbulence module further includes:

[0035] A spoiler, wherein the spoiler is slidably installed inside the spoiler block, and the spoiler has an arc-shaped structure;

[0036] A support bar is fixedly installed on the side wall of the mounting groove and extends into the turbulence block;

[0037] Arc-shaped rack two, which is fixedly installed inside the turbulence block;

[0038] Arc-shaped rack one, which is fixedly installed on the spoiler, and arc-shaped rack one and arc-shaped rack two are concentric;

[0039] Rotary shafts two and three are rotatably mounted on the support bar. A driven gear two that meshes with an arc-shaped rack one is fixedly mounted on the rotating shaft three, and a drive gear two that meshes with the arc-shaped rack two is fixedly mounted on the rotating shaft two.

[0040] And a second linkage component, which includes pulleys and a transmission belt. There are two sets of pulleys, which are fixed on shaft two and shaft three respectively. The transmission belt is used for power transmission between the two sets of pulleys, and the diameter of the pulley installed on shaft two is larger than the diameter of the pulley installed on shaft three.

[0041] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0042] The drive module can transport the resin particles introduced by the feed hopper to the discharge pipe by driving the conveying component. The discharge pipe can discharge the resin particles. The speed transmission component can make the anti-caking mechanism follow the movement of the conveying component. The anti-caking structure can disturb the resin particles during the material conveying process, so that the resin particles can be fully dispersed during the conveying process, thereby preventing the resin particles from clumping.

[0043] This invention, through the coordinated arrangement of the conveying component, the speed transmission component, and the anti-caking mechanism, avoids the problem of resin particle clumping that often occurs in existing devices in practical applications, effectively improving the conveying quality and thus enhancing the lint removal effect. Attached Figure Description

[0044] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the structure of the present invention.

[0046] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle.

[0047] Figure 3 for Figure 1 Rear view.

[0048] Figure 4 This is a schematic diagram of the internal structure of the present invention.

[0049] Figure 5 This is a schematic diagram of the conveying component in this invention.

[0050] Figure 6 This is a schematic diagram of the anti-caking component in the present invention.

[0051] Figure 7 This is a schematic diagram of the internal structure of the anti-caking component in this invention.

[0052] Figure 8 This is a schematic diagram of the internal structure of the turbulence block in this invention.

[0053] In the attached diagram: 1-Conveying pipe, 2-Feeding funnel, 3-Discharge pipe, 4-Drive module, 5-Drive gear one, 6-Rotating pipe one, 7-Rotating pipe two, 8-Linkage component, 9-Rotating shaft one, 10-Driven gear one, 11-Connecting pipe, 12-Helical blade, 13-Rotating column, 14-Guide channel one, 15-Break block, 16-Break plate, 17-Support shaft, 18-Air jet hole, 19-Pressure relief chamber, 20-Spring, 21-Guide channel two, 22-Piston plate, 23-Control chamber, 24-Conduit one, 25-Cylinder, 26-Conduit two, 27-Support bar, 28-Arc rack one, 29-Arc rack two, 30-Rotating shaft two, 31-Drive gear two, 32-Rotating shaft three, 33-Driven gear two, 34-Support seat. Detailed Implementation

[0054] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0056] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] The present invention will be further explained below with reference to specific embodiments.

[0058] Please see Figures 1-8 This invention provides a resin particle conveying device for removing lint and fuzz from lint strips. The resin particle conveying device for removing lint and fuzz from lint strips includes:

[0059] The conveying pipe 1 has an inlet and an outlet at its two ends, and an inlet funnel 2 and an outlet pipe 3 are respectively provided on the inlet and outlet. The outlet pipe 3 is connected to the lint removal equipment. The lint removal equipment is existing equipment, and the connection method between the outlet pipe 3 and the lint removal equipment is not specifically limited here.

[0060] A conveying assembly is located inside a conveying pipe 1, and a drive module 4 for driving the conveying assembly to rotate is provided at the end of the conveying pipe 1; wherein the drive module 4 may be a combination structure of a motor and a reducer, and is not specifically limited here.

[0061] The conveying pipe 1 also includes an anti-caking mechanism located within the conveying assembly, and a speed-changing transmission assembly for transmitting power between the conveying assembly and the anti-caking mechanism is provided at the end of the conveying pipe 1.

[0062] In an embodiment of the present invention, the drive module 4, by driving the conveying component, can convey the resin particles introduced by the feed funnel 2 to the discharge pipe 3. The discharge pipe 3 can discharge the resin particles. The speed transmission component can make the anti-caking mechanism follow the movement of the conveying component. The anti-caking structure can disturb the resin particles during the material conveying process, so that the resin particles can be fully dispersed during the conveying process, thereby preventing the resin particles from clumping. Compared with the prior art, the present invention, through the coordinated arrangement of the conveying component, the speed transmission component and the anti-caking mechanism, avoids the problem of resin particle clumping that often occurs in existing devices in practical applications, effectively improves the conveying quality, and thus improves the lint removal effect.

[0063] In one embodiment of the present invention, please refer to Figures 1-8 The conveying assembly includes:

[0064] A spiral blade 12 is located inside the conveying pipe 1, and multiple sets of connecting pipes 11 are fixedly installed at equal intervals inside the spiral blade 12;

[0065] And a rotating pipe 6 is rotatably installed at both ends of the conveying pipe 1. The rotating pipe 6 is fixedly connected to the connecting pipe 11 located at the end, and the rotating pipe 6 located at one end of the conveying pipe 1 is connected to the drive module 4.

[0066] In this embodiment, the drive module 4 drives the connecting pipe 11 to rotate by driving the rotating pipe 6 to rotate. The connecting pipe 11 can drive the spiral blade 12 to rotate, thereby realizing the material conveying function. The gap between two adjacent sets of connecting pipes 11 facilitates the installation of an anti-caking mechanism.

[0067] In one embodiment of the present invention, please refer to Figures 1-8 The anti-caking mechanism includes:

[0068] Rotary tube 7, which is installed inside rotating tube 6, passes through multiple sets of connecting tubes 11;

[0069] And an anti-caking assembly fixedly installed on the second pipe 7, wherein the anti-caking assembly is located between two adjacent sets of connecting pipes 11, and multiple sets of anti-caking assemblies are provided;

[0070] The speed transmission assembly includes:

[0071] Drive gear 5, which is fixedly mounted on the rotating tube 6;

[0072] A rotating shaft 9 is rotatably mounted at the end of the conveying pipe 1, and a driven gear 10 that meshes with the drive gear 5 is fixedly mounted on the rotating shaft 9.

[0073] And a linkage 8, which is used for power transmission between the second rotating tube 7 and the first rotating shaft 9; wherein the linkage 8 can adopt a combination structure of pulley and transmission belt, and the linkage 8 can realize the synchronous movement of the first rotating shaft 9 and the second rotating tube 7.

[0074] The pitch circle diameter of the drive gear 5 is larger than that of the driven gear 10, which makes the rotational speed of the shaft 9 greater than that of the tube 6, and in conjunction with the linkage 8, the rotational speed of the tube 7 is greater than that of the tube 6.

[0075] The anti-caking component includes:

[0076] A rotating column 13 is fixedly installed on the rotating pipe 7. The rotating column 13 has multiple sets of flow channels 14 connected to the rotating pipe 7. One end of the rotating pipe 7 is a closed structure. When in use, the end of the rotating pipe 7 is connected to an external air source.

[0077] The mounting slots are provided on the rotating column 13, and multiple sets of mounting slots are provided, with a flow-disrupting module provided in each set of mounting slots;

[0078] The turbulence module includes:

[0079] Support shaft 17 is fixedly installed in the mounting groove of rotating column 13, and a baffle block 15 is rotatably installed on support shaft 17;

[0080] A cylinder 25 is used to drive the deflector block 15 to rotate around the support shaft 17. Both ends of the cylinder 25 are rotatably connected to support seats 34. One support seat 34 is fixedly installed on the side wall of the mounting groove, and the other support seat 34 is fixedly connected to the deflector block 15. The cylinder 25 can adopt existing publicly available technology to pneumatically realize the telescopic function.

[0081] Second conduit 26, which is used for the connection between cylinder 25 and flow channel 14;

[0082] And a pressure relief unit for venting gas from cylinder 25;

[0083] The pressure relief unit includes:

[0084] A pressure relief chamber 19 and a control chamber 23 are provided within the turbulence block 15, and the pressure relief chamber 19 and the control chamber 23 are connected by a flow guide channel 21 provided within the turbulence block 15.

[0085] Conduit 24, which is used for communication between conduit 26 and control cavity 23;

[0086] Piston plate 22, which is slidably installed in control cavity 23, and spring 20 for elastically pressing piston plate 22 is provided in control cavity 23. The connection between conduit 1 24 and control cavity 23 is located below piston plate 22, and the connection between flow channel 21 and control cavity 23 is located above piston plate 22.

[0087] And a jet hole 18 is provided on the side wall of the turbulence block 15, the jet hole 18 being connected to the pressure relief chamber 19;

[0088] The turbulence module also includes:

[0089] The spoiler 16 is slidably installed inside the spoiler block 15, and the spoiler 16 has an arc-shaped structure.

[0090] Support bar 27, which is fixedly installed on the side wall of the mounting groove and extends into the baffle block 15;

[0091] Arc-shaped rack 29, which is fixedly installed inside the baffle block 15;

[0092] Arc-shaped rack 28 is fixedly installed on spoiler 16, and arc-shaped rack 28 and arc-shaped rack 29 are concentric.

[0093] Rotary shafts 20 and 32 are mounted on support bar 27. A driven gear 23 that meshes with arc rack 1 28 is fixedly mounted on shaft 32. A drive gear 21 that meshes with arc rack 29 is fixedly mounted on shaft 20.

[0094] And a linkage 8, which includes pulleys and a transmission belt. Two sets of pulleys are provided, which are respectively fixed on the second shaft 30 and the third shaft 32. The transmission belt is used for power transmission between the two sets of pulleys. The diameter of the pulley installed on the second shaft 30 is larger than the diameter of the pulley installed on the third shaft 32, so that the rotational speed of the third shaft 32 is greater than the rotational speed of the second shaft 30.

[0095] In this embodiment, the speed of the second rotating tube 7 is greater than that of the first rotating tube 6, allowing the second rotating tube 7 to drive the rotating column 13 to rotate in the opposite direction at a speed higher than that of the connecting tube 11. The second rotating tube 7 guides gas through the first guide channel 14 into the second conduit 26. The gas then enters the first conduit 24 and the cylinder 25 through the second conduit 26, causing the cylinder 25 to push the turbulence block 15 to rotate around the support shaft 17. This causes the turbulence block 15 to protrude from the surface of the rotating column 13, interfering with the material and effectively preventing agglomeration. Some gas enters the control chamber 23 through the first conduit 24 and pushes the piston plate 22 to move. Under the elastic support of the spring 20, the piston plate 22 will not exceed the connection between the control chamber 23 and the second guide channel 21. During the movement of the turbulence block 15, the second arc-shaped rack 29 drives the second drive gear 31 to rotate. The second 31 will drive the second shaft 30 to rotate, and in conjunction with the linkage 8, drive the third shaft 32 to rotate. The third shaft 32 can drive the arc rack 28 to move quickly by the driven gear 2 33, so that the baffle 16 moves faster than the baffle block 15. The baffle 16 can collide with the material being conveyed by following the rotation of the rotating column 13, further preventing agglomeration. During the rotation of the baffle block 15, after the baffle block 15 is pressed by the spiral blade 12, the pressing force of the baffle block 15 on the cylinder 25 increases, and at the same time, the gas entering the control chamber 23 will increase, so that the piston plate 22 is further pressed, so that the gas in the control chamber 23 can be discharged into the pressure relief chamber 19 through the guide channel 2 21 and discharged through the jet hole 18. While the baffle block 15 can be pressed and reset, the gas ejected from the jet hole 18 can impact the material, further improving the anti-agglomeration effect.

[0096] After the turbulence block 15 separates from the spiral blade 12, the turbulence block 15 will pop out again, repeating the above steps and effectively preventing clumping.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A resin granule conveying device for removing lint and fuzz, comprising a conveying pipe, wherein an inlet and an outlet are respectively provided at both ends of the conveying pipe, an inlet funnel and an outlet pipe are respectively provided at the inlet and the outlet, and the outlet pipe is connected to a lint and fuzz removal device, characterized in that, Also includes: A conveying assembly is located inside a conveying pipe, and a drive module for rotating the conveying assembly is provided at the end of the conveying pipe. The conveying pipe also includes an anti-caking mechanism located within the conveying assembly, and a speed-changing transmission assembly for transmitting power between the conveying assembly and the anti-caking mechanism is provided at the end of the conveying pipe.

2. The resin particle conveying device for removing lint and fuzz according to claim 1, characterized in that, The conveying assembly includes: The spiral blades are located inside the conveying pipe, and multiple sets of connecting pipes are fixedly installed at equal intervals inside the spiral blades; And a rotating pipe 1 is rotatably installed at both ends of the conveying pipe. The rotating pipe 1 is fixedly connected to the connecting pipe located at the end, and the rotating pipe 1 located at one end of the conveying pipe is connected to the drive module.

3. The resin particle conveying device for removing lint and fuzz according to claim 2, characterized in that, The anti-caking mechanism includes: Rotate the second rotating pipe installed inside the first rotating pipe, the second rotating pipe passing through multiple sets of connecting pipes; And an anti-caking component fixedly installed on the second rotating pipe, wherein the anti-caking component is located between two adjacent sets of connecting pipes, and multiple sets of anti-caking components are provided.

4. The resin particle conveying device for removing lint and fuzz according to claim 3, characterized in that, The speed transmission assembly includes: A drive gear one is fixedly mounted on a rotating tube one. A rotating shaft is rotatably mounted at the end of the conveying pipe, and a driven gear is fixedly mounted on the rotating shaft to mesh with the driving gear. And a linkage component one, which is used for power transmission between the rotating tube two and the rotating shaft one.

5. The resin particle conveying device for removing lint and fuzz according to claim 4, characterized in that, The pitch circle diameter of the first driving gear is larger than that of the first driven gear.

6. The resin particle conveying device for removing lint and fuzz according to claim 2, characterized in that, The anti-caking component includes: A rotating column is fixedly installed on the rotating pipe 2, and multiple sets of guide channels connected to the rotating pipe 2 are opened inside the rotating column; The mounting slots are provided on the rotating column, and there are multiple sets of mounting slots, with each set of mounting slots containing a flow-disrupting module.

7. The resin particle conveying device for removing lint and fuzz according to claim 6, characterized in that, The turbulence module includes: A support shaft is fixedly installed in the mounting groove of the rotating column, and a baffle block is rotatably installed on the support shaft; A cylinder for driving the spoiler block to rotate around the support shaft, with support seats rotatably connected to both ends of the cylinder, one of which is fixedly installed on the side wall of the mounting groove, and the other support seat is fixedly connected to the spoiler block. Conduit 2, which is used for connecting the cylinder and the flow channel 1; And a pressure relief unit for releasing gas from the cylinder.

8. The resin particle conveying device for removing lint and fuzz according to claim 7, characterized in that, The pressure relief unit includes: A pressure relief chamber and a control chamber are provided within the turbulence block, and the pressure relief chamber and the control chamber are connected by a flow guiding channel provided within the turbulence block; Catheter 1, which is used for communication between catheter 2 and the control cavity; A piston plate is slidably installed in a control cavity, and a spring is provided in the control cavity for elastically pressing the piston plate. The connection between the first conduit and the control cavity is located below the piston plate, and the connection between the second guide channel and the control cavity is located above the piston plate. And jet holes opened on the side wall of the turbulence block, the jet holes being connected to the pressure relief chamber.

9. The resin particle conveying device for removing lint and fuzz according to claim 7, characterized in that, The turbulence module also includes: A spoiler, wherein the spoiler is slidably installed inside the spoiler block, and the spoiler has an arc-shaped structure; A support bar is fixedly installed on the side wall of the mounting groove and extends into the turbulence block; Arc-shaped rack two, which is fixedly installed inside the turbulence block; Arc-shaped rack one, which is fixedly installed on the spoiler, and arc-shaped rack one and arc-shaped rack two are concentric; Rotary shafts two and three are rotatably mounted on the support bar. A driven gear two that meshes with an arc-shaped rack one is fixedly mounted on the rotating shaft three, and a drive gear two that meshes with the arc-shaped rack two is fixedly mounted on the rotating shaft two. And a second linkage component, which includes pulleys and a transmission belt. There are two sets of pulleys, which are fixed on shaft two and shaft three respectively. The transmission belt is used for power transmission between the two sets of pulleys, and the diameter of the pulley installed on shaft two is larger than the diameter of the pulley installed on shaft three.