Intelligent material lifting conveyor structure

Abstract

This invention relates to the field of conveyor structure technology, specifically to an intelligent material lifting conveyor structure. The intelligent material lifting conveyor structure includes a support frame, on which a conveying cylinder is fixedly connected. It also includes an anti-blocking component, which is movably installed inside the conveying cylinder. Through this anti-blocking component, when any of the three segmented cylinders (section 1, section 2, and section 3) becomes blocked, the frictional force of the external blockage exceeds that of the internal anti-slip sealing ring. The synchronous rotation between the shaft tube and the segmented cylinder is released, and the shaft tube begins to rotate independently. The push block rotates laterally from between the push rods, thereby sequentially pushing the push rods upwards to push and clear the material, thus relieving the blockage. This gives the conveyor its own anti-blocking and unblocking capabilities, enabling it to self-unblock in the event of a blockage, improving the practicality of the conveyor.

Description

Technical Field

[0001] This invention relates to the field of lifting conveyor structure technology, specifically to an intelligent material lifting conveyor structure. Background Technology

[0002] As a type of material lifting and conveying device, screw conveyors are widely used in industrial production and other fields due to their simple structure, flexible conveying direction, and good continuity. However, there is a prominent problem in the use of screw conveyors: due to limitations such as material characteristics, some materials are prone to blockage during the conveying process.

[0003] Screw conveyors typically use a sealed conveyor drum, making it challenging for workers to handle blockages. Currently, the common approach is to disassemble the conveyor pipe or access door, but this method has several drawbacks. Firstly, because the location of the blockage is difficult to pinpoint, and the accessibility of the access door is limited, disassembling the door often fails to effectively resolve the blockage. Secondly, disassembling the pipe is difficult and complex, usually requiring specialized maintenance personnel, which not only consumes a significant amount of time but also severely impacts work efficiency.

[0004] To address the aforementioned issues, this application proposes an intelligent material lifting conveyor structure. Summary of the Invention

[0005] To solve the above technical problems, this application provides an intelligent material lifting conveyor structure, including a support frame, on which a conveying cylinder is fixedly connected, and an anti-blocking component for ejection, which is movably installed inside the conveying cylinder;

[0006] The ejection anti-blocking assembly also includes a core tube, a push block, a first segmented cylinder, a second segmented cylinder, a third segmented cylinder, and a push rod;

[0007] The shaft tube is rotatably connected inside the conveying cylinder. The first segment cylinder, the second segment cylinder, and the third segment cylinder are slidably connected to the shaft tube and arranged vertically in sequence. The first segment cylinder can be rotatably connected to the adjacent second segment cylinder, and the second segment cylinder can be rotatably connected to the adjacent third segment cylinder.

[0008] The push block is fixedly connected to the shaft tube, and the push rod is movably installed on the surface of the first segmented cylinder, the second segmented cylinder, and the third segmented cylinder. The push block can push the push rod outward.

[0009] The balance reset assembly is used to reset the push rod after it has been pushed out.

[0010] In some embodiments, the ejection anti-blocking assembly further includes an air intake, the push block is segmentally fixedly connected to the shaft tube, the air intake is opened on the shaft tube, and the push block and air intake are located inside the first segmented cylinder, the second segmented cylinder and the third segmented cylinder.

[0011] In some embodiments, the ejection anti-blocking assembly further includes a spiral pusher blade, which is fixedly connected to the outer side of the first segmented cylinder, the second segmented cylinder, and the third segmented cylinder. The first segmented cylinder is slidably connected to the second segmented cylinder, and the third segmented cylinder is slidably connected to the second segmented cylinder.

[0012] In some embodiments, the ejection anti-blocking assembly further includes a connecting pipe and an anti-slip sealing ring. The connecting pipe is fixedly connected to the upper and lower parts of the first segmented cylinder, the second segmented cylinder, and the third segmented cylinder. The anti-slip sealing ring is fixedly connected inside the connecting pipe. The spindle is slidably connected inside the anti-slip sealing ring. The push block is located between the connecting pipes.

[0013] In some embodiments, the ejection anti-blocking assembly further includes a sliding sleeve, a push rod, and a limiting ball. The sliding sleeve is fixedly connected to the surface positions of the first segmented cylinder, the second segmented cylinder, and the third segmented cylinder. The push rod is slidably connected inside the sliding sleeve. The lower end of the push rod is inclined downward and fixedly connected to a limiting ball. The surface of the shaft tube is coated with magnetic paint, and the limiting ball is attracted to the shaft tube.

[0014] In some embodiments, the ejection anti-blocking assembly further includes positioning holes, which are respectively opened at the upper ends of the first segmented cylinder, the second segmented cylinder, and the third segmented cylinder.

[0015] In some embodiments, the ejection anti-blocking assembly further includes a receiving groove, a spring, and a sliding column. The receiving groove is located at the lower part of the second and third segmented cylinders. The sliding column and the spring are located inside the receiving groove, with the sliding column located above the spring. The sliding column is movably mounted downwards in the positioning hole.

[0016] In some embodiments, the balance reset assembly includes a bellows, an air inlet, a sun gear, a pinion, and an air intake vane. The bellows is fixedly connected to the upper end of the conveying cylinder, the air inlet is located above the bellows, the sun gear is rotatably connected inside the bellows, the pinion is movably mounted on the side of the sun gear, and the air intake vane is fixedly connected above the pinion and movably mounted inside the air inlet.

[0017] In some embodiments, the spindle is rotatably connected to the conveying cylinder via a bearing, the upper end of the spindle extends into the air box, the lower end of the spindle is fixedly connected to a pulley and located below the bracket, the upper and lower ends of the spindle are in communication with the outside air, and the sun gear is fixedly connected to the upper end of the spindle.

[0018] In some embodiments, the balance reset assembly further includes a connecting bearing and a rotating rod. The lower end of the rotating rod is rotatably connected to the air box via the connecting bearing. The upper end of the rotating rod extends into the air inlet and is fixedly connected to the air intake blade. A pinion is fixedly connected to the middle of the rotating rod, and the pinion meshes with the sun gear.

[0019] The present invention has at least the following beneficial effects:

[0020] By using an anti-blocking ejection assembly, the spiral blades inside the conveyor drum are divided into three sections: section one, section two, and section three. Driven by the high friction of the anti-slip sealing ring, the shaft tube moves all three sections together, thus conveying the material. When a blockage occurs, the friction increases dramatically, causing a section to stop. The friction on the outside of the blockage is greater than the friction between the inside and the anti-slip sealing ring. At this point, the shaft tube continues to rotate, and the corresponding push block rotates to the side from the gap of the push rod, pushing the push rod outward in sequence. This causes the push rod to tilt upward and push out, thus pushing and clearing the material, allowing it to move upward and clearing the blockage. This gives the conveyor itself the ability to clear blockages and prevent blockages, thereby improving the ease of use and reducing maintenance requirements.

[0021] The air is exhausted through the set balance reset component in the air box, and the air box is in a negative pressure state, which makes it easy for the shaft tube to draw gas from bottom to top. After the gas in the first, second and third segmented cylinders is discharged through the air intake, the negative pressure environment makes it easy to pull the push rod downward, so that the push rod can be reset after being pushed out. When the airflow flows in the shaft tube, it is easy to dissipate heat and cool down the position of the anti-slip seal ring, thereby improving the wear resistance of the anti-slip seal ring. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the disassembled structure of the conveying cylinder of the present invention;

[0024] Figure 3 This is a cross-sectional view of the No. 1 and No. 2 segmented cylinders of the present invention.

[0025] Figure 4 This is an enlarged view of point A in the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the axial tube of the present invention;

[0027] Figure 6 This is an enlarged view of point B in the present invention;

[0028] Figure 7 This is a cross-sectional view of the wind box of the present invention.

[0029] In the diagram: 1. Support; 2. Conveying cylinder; 3. Ejection anti-blocking assembly; 301. Shaft tube; 302. Push block; 303. Inlet; 304. No. 1 segmented cylinder; 305. No. 2 segmented cylinder; 306. No. 3 segmented cylinder; 307. Spiral pusher blade; 308. Connecting pipe; 309. Anti-slip sealing ring; 310. Sliding sleeve; 311. Push rod; 312. Limiting ball; 313. Positioning hole; 314. Storage groove; 315. Spring; 316. Sliding column; 4. Balance reset assembly; 401. Air box; 402. Air inlet; 403. Sun gear; 404. Pinion; 405. Connecting bearing; 406. Rotating rod; 407. Inlet blade. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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. Example

[0031] Please see Figures 1 to 6 The present invention provides a technical solution: an intelligent material lifting conveyor structure, including a support 1, a conveying cylinder 2 fixedly connected to the support 1, and an anti-blocking component 3, which is movably installed inside the conveying cylinder 2;

[0032] The ejection anti-blocking assembly 3 also includes a core tube 301, a first segmented cylinder 304, a second segmented cylinder 305, a third segmented cylinder 306, and an ejector rod 311;

[0033] The spindle tube 301 is rotatably connected inside the conveying cylinder 2. The first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306 are slidably connected to the spindle tube 301 and arranged vertically in sequence. The push rod 311 is movably installed on the first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306. The ejection anti-blocking assembly 3 also includes a spiral pusher blade 307. The spiral pusher blade 307 is fixedly connected to the outer side of the first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306. The first segmented cylinder 304 is slidably connected to the second segmented cylinder 305, and the third segmented cylinder 306 is slidably connected to the second segmented cylinder 305.

[0034] Furthermore, the ejection anti-blocking component 3 also includes a push block 302 and an air intake 303. The push block 302 is fixedly connected to the shaft tube 301 in sections, and the air intake 303 is opened on the shaft tube 301. The push block 302 and the air intake 303 are located inside the first segmented cylinder 304, the second segmented cylinder 305 and the third segmented cylinder 306.

[0035] The push block 302 is located between the gaps of the push rod 311. In the initial state, the first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306 rotate synchronously and achieve a relatively stationary state with the internally rotating shaft tube 301. The push block 302 is stationary in this space, located between the gaps of the push rod 311, and does not push the push rod 311 in any way, so that the material can easily move upward along the spiral pusher blade 307.

[0036] Furthermore, the ejection anti-blocking component 3 also includes a connecting pipe 308 and an anti-slip sealing ring 309. The connecting pipe 308 is fixedly connected to the upper and lower parts of the first segmented cylinder 304, the second segmented cylinder 305 and the third segmented cylinder 306. The anti-slip sealing ring 309 is fixedly connected inside the connecting pipe 308. The shaft tube 301 is slidably connected inside the anti-slip sealing ring 309. The push block 302 is located between the connecting pipes 308.

[0037] The anti-slip sealing rings 309, which are fixedly connected to the shaft tube 301 through the connecting pipe 308, achieve synchronous rotation with the shaft tube 301 through a large static friction force. The anti-slip sealing rings 309 also seal both ends of the first section cylinder 304, the second section cylinder 305, and the third section cylinder 306, making it easy for the section cylinders to form a negative pressure state through exhaust.

[0038] Furthermore, the ejection anti-blocking assembly 3 also includes a sliding sleeve 310, an ejector rod 311, and a limiting ball 312. The sliding sleeve 310 is fixedly connected to the surface of the first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306. The ejector rod 311 is slidably connected inside the sliding sleeve 310. The lower end of the ejector rod 311 is inclined downward and fixedly connected to the limiting ball 312. The surface of the shaft tube 301 is coated with magnetic paint, and the limiting ball 312 and the shaft tube 301 are attracted to each other.

[0039] The inner side of the sliding sleeve 310 is fitted with a sealing ring to facilitate a sliding seal with the push rod 311. After the push rod 311 is reset downwards, the upper end of the push rod 311 is designed with an arc surface, and the surfaces of the first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306 form a smooth circular plane, so that the material will not be obstructed by the push rod 311 when it moves upwards along the spiral pusher blade 307. The surface of the shaft tube 301 is coated with a magnetic coating to facilitate the adsorption of the push rod 311 on the surface.

[0040] Furthermore, the ejection anti-blocking component 3 also includes a positioning hole 313. The positioning hole 313 is provided at the upper end of the first segmented cylinder 304, the second segmented cylinder 305 and the third segmented cylinder 306. The ejection anti-blocking component 3 also includes a storage groove 314, a spring 315 and a sliding column 316. The storage groove 314 is provided at the lower part of the second segmented cylinder 305 and the third segmented cylinder 306. The sliding column 316 and the spring 315 are located in the storage groove 314, and the sliding column 316 is located above the spring 315. The sliding column 316 can be movably installed downward in the positioning hole 313.

[0041] Taking the blockage of segmented cylinder 305 as an example, among the three segmented cylinders 304 (section 1), 305 (section 2), and 306: When segmented cylinder 305 becomes blocked and comes to a standstill, the outer side of segmented cylinder 305 experiences greater friction due to material blockage. This friction is greater than the static friction at the anti-slip sealing ring 309 on the inner side of segmented cylinder 305. At this time, the spindle 301 begins to rotate within the anti-slip sealing ring 309. The anti-slip sealing ring 309, heated, begins to reduce friction, and the spindle 301... When the synchronous rotation of section 1 and section 2 305 is released, the sliding column 316 on section 3 306 slides out from the positioning hole 313 of section 2 305 below and slides on the surface of section 2 305. The corresponding push block 302 pushes to the side from the gap of push rod 311, thereby pushing push rod 311 upward in sequence. By pushing push rod 311 upward along the direction of spiral push blade 307, the material is pushed and conveyed, so that the material is cleared of blockage.

[0042] After the material blockage is cleared, the friction caused by the blockage decreases. At this point, under the action of the anti-slip sealing ring 309, the second segmented cylinder 305 begins to rotate again. The temperature at the anti-slip sealing ring 309 begins to decrease due to the rotation of the second segmented cylinder 305, and the static friction gradually increases. Initially, the rotational speeds of the second segmented cylinder 305 and the third segmented cylinder 306 are not the same. The sliding column 316 rotates circumferentially at the upper end, continuously sliding into and out of the positioning hole 313 during rotation. The greater pushing force when sliding out of the positioning hole 313 accelerates the second segmented cylinder 305. When the rotational speeds of the two are close, the sliding column 316 again... After being inserted into the corresponding positioning hole 313, it no longer slides out, causing the second segmented cylinder 305 and the third segmented cylinder 306 to rotate at the same speed. At this time, the corresponding push block 302 moves again to the gap between the initial push rods 311. Under the suction of the negative pressure inside the second segmented cylinder 305 and the movement and squeezing of the material on the outside, all the push rods 311 reset downwards, restricting the ball 312 and the surface of the shaft tube 301 to be suctioned and reset again, thus completing the entire unblocking process. This gives the conveyor itself a certain self-unblocking ability, enabling it to unblock blockages in the event of a blockage, reducing the need for external maintenance personnel, improving the practicality of the conveyor, and making the conveyor more intelligent. Example

[0043] Please see Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7 Based on Embodiment 1, the present invention provides another technical solution: a balance reset assembly 4 is movably connected to the conveying cylinder 2. The balance reset assembly 4 includes a bellows 401, a sun gear 403, a pinion 404, and an air intake blade 407. The bellows 401 is fixedly connected to the upper end of the conveying cylinder 2. The sun gear 403 is rotatably connected inside the bellows 401. The pinion 404 is movably installed on the side of the sun gear 403. The air intake blade 407 is fixedly connected above the pinion 404.

[0044] Furthermore, the shaft tube 301 is rotatably connected to the conveying cylinder 2 via a bearing. The upper end of the shaft tube 301 extends into the air box 401, and the lower end of the shaft tube 301 is fixedly connected to a pulley, which is located below the bracket 1. The upper and lower ends of the shaft tube 301 are in communication with the outside air, and the sun gear 403 is fixedly connected to the upper end of the shaft tube 301.

[0045] By fixing the shaft tube 301 to the sun gear 403, the sun gear 403 rotates synchronously when the conveyor starts working. The larger sun gear 403 drives the rotation of multiple smaller gears 404, thereby increasing the speed of the smaller gears 404.

[0046] Furthermore, the balance reset assembly 4 also includes an air inlet 402, which is located above the air box 401. The suction vane 407 is movably installed inside the air inlet 402. The balance reset assembly 4 also includes a connecting bearing 405 and a rotating rod 406. The lower end of the rotating rod 406 is rotatably connected to the air box 401 through the connecting bearing 405. The upper end of the rotating rod 406 extends into the air inlet 402 and is fixedly connected to the suction vane 407. A pinion 404 is fixedly connected to the middle of the rotating rod 406. The pinion 404 meshes with the sun gear 403.

[0047] The rotation of the pinion 404 causes the suction vane 407 to rotate, thereby expelling the gas in the air box 401. The shaft tube 301 connects to the first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306 through the suction port 303, thereby providing a negative pressure environment for the segmented cylinders, which facilitates the downward adsorption of the top rod 311, allowing the top rod 311 to be stored downwards.

[0048] When the conveyor starts working, the spindle tube 301 drives the sun gear 403 to rotate, which in turn drives the pinion 404 to rotate. This, in turn, discharges gas from the air box 401 through the rotating suction vane 407, creating a negative pressure environment in the air box 401. The air box 401 is connected to the first segmented cylinder 304, the second segmented cylinder 305, and the third segmented cylinder 306, facilitating the downward reset of the push rod 311 and providing negative pressure suction. Simultaneously, the lower end of the spindle tube 301 is connected to the outside, drawing in external gas. When a blockage occurs, the anti-slip sealing ring 309 inside the corresponding connecting pipe 308 heats up due to friction, reaching a high temperature. External cold air can flow outward from the shaft tube 301, carrying away some of the heat from the anti-slip sealing ring 309, thus cooling it and improving its wear resistance. Once the material is cleared, when the corresponding segmented drum begins to rotate, the continuously flowing gas inside the shaft tube 301 helps the anti-slip sealing ring 309 continue to cool down, thereby increasing friction.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart material lifting conveyor structure, comprising a support frame (1), wherein a conveying cylinder (2) is fixedly connected to the support frame (1), characterized in that: It also includes an ejection anti-blocking component (3), which is movably installed inside the conveying cylinder (2); The ejection anti-blocking assembly (3) also includes a spindle tube (301), a push block (302), a first segmented cylinder (304), a second segmented cylinder (305), a third segmented cylinder (306), and a push rod (311). The core tube (301) is rotatably connected inside the conveying cylinder (2). The first segmented cylinder (304), the second segmented cylinder (305), and the third segmented cylinder (306) are slidably connected to the core tube (301) and arranged vertically in sequence. The first segmented cylinder (304) can be rotatably connected to the adjacent second segmented cylinder (305), and the second segmented cylinder (305) can be rotatably connected to the adjacent third segmented cylinder (306). The push block (302) is fixedly connected to the shaft tube (301), and the push rod (311) is movably installed on the surface of the first segmented cylinder (304), the second segmented cylinder (305) and the third segmented cylinder (306). The push block (302) can push the push rod (311) outward. The balance reset assembly (4) is used to reset the push rod (311) after it is pushed out; The ejection anti-blocking component (3) also includes an air intake (303), the push block (302) is fixedly connected to the shaft tube (301) in sections, the air intake (303) is opened on the shaft tube (301), and the push block (302) and the air intake (303) are located inside the first segmented cylinder (304), the second segmented cylinder (305) and the third segmented cylinder (306); The ejection anti-blocking assembly (3) also includes a spiral pusher blade (307), which is fixedly connected to the outer side of the first segmented cylinder (304), the second segmented cylinder (305) and the third segmented cylinder (306). The first segmented cylinder (304) is slidably connected to the second segmented cylinder (305), and the third segmented cylinder (306) is slidably connected to the second segmented cylinder (305). The ejection anti-blocking assembly (3) also includes a connecting pipe (308) and an anti-slip sealing ring (309). The connecting pipe (308) is fixedly connected to the upper and lower parts of the first segmented cylinder (304), the second segmented cylinder (305), and the third segmented cylinder (306). The anti-slip sealing ring (309) is fixedly connected inside the connecting pipe (308). The spindle tube (301) is slidably connected inside the anti-slip sealing ring (309). The push block (302) is located between the connecting pipes (308). The ejection anti-blocking assembly (3) also includes a sliding sleeve (310), a push rod (311), and a limiting ball (312). The sliding sleeve (310) is fixedly connected to the surface of the first segmented cylinder (304), the second segmented cylinder (305), and the third segmented cylinder (306). The push rod (311) is slidably connected inside the sliding sleeve (310). The lower end of the push rod (311) is inclined downward and fixedly connected to the limiting ball (312). The surface of the shaft tube (301) is coated with magnetic paint. The limiting ball (312) and the shaft tube (301) are attracted to each other. Driven by the large friction of the anti-slip sealing ring (309), the shaft tube (301) drives the first segmented cylinder (304), the second segmented cylinder (305) and the third segmented cylinder (306) to move together, thereby conveying the material. When a blockage occurs at a certain point, the friction increases dramatically, causing a certain segmented cylinder to stop. The friction of the blockage on the outside is greater than the friction between the inside and the anti-slip sealing ring (309). At this time, the shaft tube (301) continues to rotate, and the corresponding push block (302) rotates to the side from the gap of the push rod (311), thereby pushing the push rod (311) outward in sequence, causing the push rod (311) to tilt upward and push out, thereby pushing and clearing the material.

2. The intelligent material lifting conveyor structure according to claim 1, characterized in that: The ejection anti-blocking component (3) also includes positioning holes (313), which are respectively opened at the upper ends of the first segmented cylinder (304), the second segmented cylinder (305) and the third segmented cylinder (306).

3. The intelligent material lifting conveyor structure according to claim 2, characterized in that: The ejection anti-blocking assembly (3) also includes a storage groove (314), a spring (315) and a sliding column (316). The storage groove (314) is located at the lower part of the second segmented cylinder (305) and the third segmented cylinder (306). The sliding column (316) and the spring (315) are located in the storage groove (314), and the sliding column (316) is located above the spring (315). The sliding column (316) can be movably installed downward in the positioning hole (313).

4. The intelligent material lifting conveyor structure according to claim 1, characterized in that: The balance reset assembly (4) includes a bellows (401), an air inlet (402), a sun gear (403), a pinion (404), and an air intake (407). The bellows (401) is fixedly connected to the upper end of the conveying cylinder (2). The air inlet (402) is located above the bellows (401). The sun gear (403) is rotatably connected inside the bellows (401). The pinion (404) is movably installed on the side of the sun gear (403). The air intake (407) is fixedly connected above the pinion (404) and is movably installed inside the air inlet (402).

5. The intelligent material lifting conveyor structure according to claim 4, characterized in that: The spindle tube (301) is rotatably connected to the conveying cylinder (2) via a bearing. The upper end of the spindle tube (301) extends into the air box (401). The lower end of the spindle tube (301) is fixedly connected to a pulley and is located below the bracket (1). The upper and lower ends of the spindle tube (301) are connected to the outside air. The sun gear (403) is fixedly connected to the upper end of the spindle tube (301).

6. The intelligent material lifting conveyor structure according to claim 5, characterized in that: The balance reset assembly (4) also includes a connecting bearing (405) and a rotating rod (406). The lower end of the rotating rod (406) is rotatably connected to the air box (401) through the connecting bearing (405). The upper end of the rotating rod (406) extends into the air inlet (402) and is fixedly connected to the air intake blade (407). A pinion (404) is fixedly connected to the middle position of the rotating rod (406), and the pinion (404) meshes with the sun gear (403).

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