An automatic assembly device for a fan

Abstract

This invention discloses an automatic fan assembly device. It includes a base with a fan cover placement slot and two columns on either side of the slot. A fan cover is placed inside the slot. Each column has a slider, which is mounted on an opposite side of the columns and slidably connected vertically. Each slider has a movable gripper, which is also mounted on an opposite side and movably connected. A fan shaft is positioned between the two grippers. Each column also has a second slider, which is mounted on an opposite side of the columns and slidably connected vertically. A fan cover mounting ring is fixedly connected between the two second sliders, and the second fan cover is positioned inside the mounting ring. The advantages of this invention are: it enables automatic assembly of fan parts, greatly improving assembly efficiency and reducing labor costs.

Description

Technical Field

[0001] This invention relates to the field of fan-related technology, and in particular to an automatic fan assembly device. Background Technology

[0002] An electric fan, also known as a fan or air ventilator, is a household appliance that uses an electric motor to drive fan blades to rotate, thereby accelerating air circulation. It is primarily used for cooling and air circulation. It is widely used in homes, classrooms, offices, shops, hospitals, and hotels. Common household electric fans are essentially axial flow fans, meaning the airflow is parallel to the axis of rotation of the fan blades.

[0003] Chinese Patent Publication No. CN208268119U, published on December 21, 2018, discloses a novel fan assembly structure, including a fan, a fan bracket, a top cover, a bottom shell, and a panel. The fan bracket includes a horizontal plate and a vertical plate. The horizontal plate has a first threaded hole, and the vertical plate has a second threaded hole and a fan mounting hole. The fan is fixed to the fan bracket through the fan mounting hole. The fan bracket is fixed to the bottom shell through the first threaded hole. The panel is fixed to the side of the bottom shell, and the top cover is fixedly connected to the fan bracket through the second threaded hole. The drawback of this patent is that the fan parts require manual assembly, resulting in low assembly efficiency and high labor costs.

[0004] In summary, there is a need for an automated fan assembly device that can automatically assemble fan parts. Summary of the Invention

[0005] The present invention aims to overcome the shortcomings of existing technologies where manual assembly of fan parts is required, resulting in low assembly efficiency and high labor costs. It provides an automatic fan assembly device that can automatically assemble fan parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic fan assembly device includes a base with a fan cover placement slot and two columns on either side of the slot. A fan cover is placed inside the slot. Each column has a slider mounted on one of its opposing surfaces, and the two columns are slidably connected vertically. Each slider also has a movable gripper mounted on one of its opposing surfaces and movably connected. A fan shaft is positioned between the two grippers, directly above the fan cover. Each column also has a sliding... Block 2, the slider 2 is installed on the opposite side of the two columns and the two are slidably connected up and down. A fan cover 2 mounting ring is fixedly connected between the two sliders 2. The fan cover 2 is provided on the inner side of the fan cover 2 mounting ring. The fan cover 2 is placed directly above the fan shaft. Both the fan cover 1 and the fan cover 2 are provided with fan shaft mounting holes. The two fan shaft mounting holes are respectively matched with the two ends of the fan shaft. The opposite side of the fan cover 1 and the fan cover 2 are provided with mutually matching buckle structures. The columns are provided with a driving structure. The slider 1, slider 2 and movable gripper are all connected to the driving structure.

[0007] Before assembly, place fan cover one in the fan cover one placement slot, then place the fan shaft between the two movable grippers. The drive mechanism moves the movable grippers, automatically clamping and fixing the fan shaft directly above fan cover one (with the bottom end of the fan shaft aligned with the fan shaft mounting hole on fan cover one). Then, place fan cover two into the fan cover two mounting ring and fix it (with the top end of the fan shaft aligned with the fan shaft mounting hole on fan cover two). During assembly, the drive mechanism first controls slider one to move downwards, automatically inserting the bottom end of the fan shaft into the fan shaft mounting hole on fan cover one. Then, the movable grippers automatically reset, releasing the fan shaft. Finally, slider two moves downwards, automatically covering fan cover two onto fan cover one (the snap-fit ​​structure between fan cover one and fan cover two automatically locks in place), and the top end of the fan shaft automatically inserts into the fan shaft mounting hole on fan cover two, completing the assembly. This achieves the goal of automatically assembling fan parts, greatly improving assembly efficiency and reducing labor costs.

[0008] Preferably, both columns are provided with axial grooves, which are located on opposite sides of the two columns. Slider 1 and Slider 2 are both installed within these axial grooves and are slidably connected to them vertically. The design of the axial grooves facilitates the installation of Slider 1 and Slider 2 on the columns, guides their movement, and improves assembly accuracy.

[0009] Preferably, the driving structure includes a cylinder 1 connected to a slider 1, a cylinder 2 connected to a slider 2, and a cylinder 3 connected to a movable gripper. Cylinder 1 is fixed to the lower end wall of the axial slide groove, and the piston rods of slider 1 and cylinder 1 are fixedly connected. Cylinder 2 is fixed to the upper end wall of the axial slide groove, and the piston rods of slider 2 and cylinder 2 are fixedly connected. Cylinder 3 is fixed to one of the opposing surfaces of the two sliders 1, and the movable gripper is fixedly connected to the piston rod of cylinder 3. The operation of slider 1, slider 2, and the movable gripper is controlled by cylinders 1, 2, and 3 respectively. The structure is simple, the action is rapid, the response is sensitive, and it is easy to manufacture, install, and maintain.

[0010] Preferably, the fan shroud mounting ring has several cavities, arranged in a ring around the centerline of the fan shroud mounting ring. Each cavity has a push rod through-hole on its sidewall near the centerline of the fan shroud mounting ring, with a push rod slidably connected within the through-hole. A piston is slidably connected inside each cavity. One end of the push rod is placed inside the cavity and fixed to one side of the piston, while the other end passes through the push rod through-hole and is positioned inside the fan shroud mounting ring and connected to it. Each cavity also contains a spring, one end of which is connected to the other side of the piston, and the other end is connected to the sidewall of the cavity away from the centerline of the fan shroud mounting ring. An oil passage hole is provided on the sidewall of the cavity away from the centerline of the fan shroud mounting ring. The oil passage hole is externally connected to a pressure oil control mechanism. After the second fan shroud is inserted into the inner side of the mounting ring, the pressure oil control mechanism injects pressure oil into all chambers one through the oil passage, thereby driving the piston and its push rod to press against the second fan shroud from all sides (at this time, spring one is stretched), thus fixing the second fan shroud to the inner side of the mounting ring. After the second fan shroud is fully assembled, the pressure oil control mechanism controls the return flow of pressure oil in chamber one. At this time, the piston and its push rod will automatically reset under the elastic force of spring one, releasing the second fan shroud. The structure is simple and the control is convenient.

[0011] Preferably, both fan shroud one and fan shroud two include an outer ring shell and a central block. The central block is located inside the outer ring shell, and several connecting rods are provided between the two. One end of each connecting rod is mounted on the inner side wall of the outer ring shell, and the other end is mounted on the side wall of the central block. The connecting rods are arranged in a ring around the central block. Guide vanes are located on the side walls of the connecting rods, and the fan shaft mounting hole is located on the central block. When the fan is working, air is drawn in through the gap between adjacent connecting rods on one fan shroud and blown out through the gap between adjacent connecting rods on the other fan shroud. The guide vanes guide the air and impede its lateral flow, ensuring that the air is blown out evenly.

[0012] Preferably, the snap-fit ​​structure includes a matching annular mounting groove and an annular mounting strip. The annular mounting groove is placed on the outer ring shell of fan cover one and located at one end near fan cover two. The annular mounting strip is placed on the outer ring shell of fan cover two and located at one end near fan cover one. A snap-fit ​​is provided on the side wall of the annular mounting groove, and a matching slot is provided on the annular mounting strip. When fan cover one and fan cover two are engaged, the annular mounting strip automatically matches and installs with the annular mounting groove. Simultaneously, the snap-fit ​​on the annular mounting groove automatically engages with the slot on the annular mounting strip, achieving the purpose of fixing fan cover one and fan cover two together. The connection method is simple and easy to operate, facilitating installation and disassembly, and reducing the difficulty of later maintenance and repair.

[0013] Preferably, the central block has a second cavity inside, which houses an automatic blade opening and closing mechanism. The other end of the connecting rod passes through the side wall of the central block and is placed within the second cavity, connecting to the automatic blade opening and closing mechanism. The other end of the connecting rod is rotatably connected to the central block. One end of the connecting rod has a connecting rod mounting groove, and the inner wall of the outer ring shell has a mounting post that matches the connecting rod mounting groove. One end of the connecting rod is mounted on the inner wall of the outer ring shell through the cooperation of the connecting rod mounting groove and the mounting post, and is rotatably connected to it. The gaps between the guide vanes and adjacent connecting rods are matched. When the fan is not working, the guide vanes on the connecting rods block the gaps between adjacent connecting rods, keeping the entire fan in a closed state, isolating internal parts from dust, moisture, insects, etc., thus maintaining the cleanliness of the fan's interior and improving its service life. When the fan is working, the automatic blade opening and closing mechanism controls the rotation of the connecting rods and their guide vanes, causing the gaps between adjacent connecting rods to slowly open, allowing air to circulate through these gaps.

[0014] Preferably, the fan shaft mounting hole is located on one end wall of the second cavity and on one side of the two center blocks opposite each other. A fixing post is provided on the other end wall of the second cavity. The centerline of the fixing post and the centerline of the fan shaft mounting hole are on the same straight line. The length of the fixing post is less than the distance between the two end walls of the second cavity. The automatic blade opening and closing mechanism includes a rotating tube sleeved on the outside of the fixing post. The rotating tube and the fixing post are rotatably connected. The length of the rotating tube is equal to the distance between the two end walls of the second cavity. The inner diameter of the rotating tube is greater than the diameter of the fan shaft mounting hole. The other end of the connecting rod is arranged in a ring around the rotating tube. On the outside of the rotating tube, a bevel gear one is sleeved, and the bevel gear one is fixedly connected to the rotating tube. A bevel gear two is sleeved on the other end of the connecting rod, and the bevel gear two is fixedly connected to the connecting rod. All bevel gear two mesh with bevel gear one. A flexible friction ring is fixed on the inner wall of the rotating tube, and the centerline of the flexible friction ring and the centerline of the rotating tube are on the same straight line. The flexible friction ring is placed between the fan shaft mounting hole and the fixed post, and the inner diameter of the flexible friction ring matches the outer diameter of the fan shaft. A side plate is fixed on the outer wall of the rotating tube, and the side plate is connected to the inner side wall of the cavity two by spring two. The rotating tube and the fixed post serve to limit the installation of the fan shaft. Both ends of the fan shaft pass through the two fan shaft mounting holes and are inserted into the rotating tube, with the side wall of the fan shaft in contact with the flexible friction ring, and both ends of the fan shaft are pressed against the two fixed posts. When the fan is not working, the guide vanes on the connecting rod block the gap between adjacent connecting rods, and the entire fan is in a closed state. When the fan starts working, the fan shaft begins to rotate. Initially, due to the contact between the side wall of the fan shaft and the flexible friction ring, the rotating tube will rotate synchronously with the fan shaft under the action of friction (during this process, spring two will be stretched, and the pulling force on the rotating tube from spring two will gradually increase). As the rotating tube rotates, through the transmission of bevel gear one and bevel gear two, it will drive all the connecting rods and their guide vanes to rotate simultaneously, thereby causing the gaps between adjacent connecting rods to slowly open. When the sliding friction between the fan shaft and the flexible friction ring is equal to the elastic force of spring two on the rotating tube, the rotating tube stops rotating. At this time, the gaps between adjacent connecting rods are just in a fully open state.

[0015] Preferably, both ends of the fan shaft are provided with rounded corners. The rounded corners improve the smoothness of the fan shaft during insertion into the rotating tube, making assembly simple, convenient, time-saving, and labor-saving.

[0016] Preferably, a rotary motor is mounted on the central block of the second fan cover. The rotary motor has a motor shaft. The end face of the fixed column and the side wall of the second cavity both have motor shaft through holes that match the motor shaft. The motor shaft is placed inside the motor shaft through hole, with its end passing through the through hole. The end face of the fan shaft has a motor shaft mounting slot that matches the end of the motor shaft. When the end of the fan shaft (with the motor shaft mounting slot) is inserted into the rotating tube, the motor shaft mounting slot on the fan shaft matches and engages with the motor shaft. The structure is simple and easy to assemble. After the fan shaft is installed, the motor shaft drives the fan shaft to rotate.

[0017] The beneficial effects of this invention are: it can automatically assemble fan parts, greatly improving assembly efficiency and reducing labor costs; it improves assembly accuracy; it has a simple structure, rapid action, sensitive response, and is easy to manufacture, install, and maintain; the guide vanes can guide and impede the lateral flow of air, enabling the air to be blown out evenly; the connection method is simple and easy to operate, facilitating installation and disassembly, and reducing the difficulty of later maintenance and repair; when the fan is not working, the guide vanes are in a closed state, isolating the internal parts from dust, moisture, insects, etc., which can keep the fan's interior clean and improve the fan's service life; when the fan is working, the guide vanes can automatically open. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a diagram showing the working state of the present invention; Figure 3 yes Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the fan structure; Figure 5 yes Figure 4 Enlarged view of point B in the middle; Figure 6 yes Figure 4 Enlarged view of point C in the middle; Figure 7 yes Figure 4 Enlarged view at point D; Figure 8 This is a state diagram of the fan when it is working; Figure 9 This is a diagram showing the state when the fan is not working.

[0019] In the diagram: 1. Base, 2. Fan shroud I placement slot, 3. Column, 4. Fan shroud I, 5. Slider I, 6. Movable gripper, 7. Fan shaft, 8. Slider II, 9. Fan shroud II mounting ring, 10. Fan shroud II, 11. Fan shaft mounting hole, 12. Axial groove, 13. Cylinder I, 14. Cylinder II, 15. Cylinder III, 16. Cavity I, 17. Push rod through hole, 18. Push rod, 19. Piston, 20. Spring I, 21. Outer ring shell, 22. Center block, 23. Connecting rod, 24. Guide vane, 25. Annular mounting groove, 26. Annular mounting strip, 27. Buckle, 28. Slot, 29. Cavity II, 30. Connecting rod mounting groove, 31. Mounting column, 32. Fixing column, 33. 34. Rotating tube; 35. Bevel gear one; 36. Bevel gear two; 37. Flexible friction ring; 38. Side plate; 39. Spring two; 40. Rotary motor; 41. Motor shaft; 42. Motor shaft through hole; 43. Motor shaft mounting slot; 44. Oil passage hole. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 and Figure 2 In the described embodiment, an automatic fan assembly device includes a base 1, on which a fan cover placement slot 2 and two columns 3 are provided. The two columns 3 are positioned on both sides of the fan cover placement slot 2, and a fan cover 4 is placed inside the fan cover placement slot 2. Each of the two columns 3 is provided with a slider 5, which is mounted on the opposite side of the two columns 3 and is slidably connected vertically. Each slider 5 is provided with a movable gripper 6, which is mounted on the opposite side of the two sliders 5 and is movably connected. A fan shaft 7 is provided between the two movable grippers 6, and the fan shaft 7 is positioned directly above the fan cover 4. The two columns 3 are also equipped with... A second slider 8 is provided, which is installed on the opposite side of two columns 3 and is slidably connected to them. A second fan cover mounting ring 9 is fixedly connected between the two sliders 2 8. A second fan cover 10 is provided on the inner side of the second fan cover mounting ring 9. The second fan cover 10 is located directly above the fan shaft 7. Both the first fan cover 4 and the second fan cover 10 are provided with fan shaft mounting holes 11, which are respectively matched with the two ends of the fan shaft 7. The opposite side of the first fan cover 4 and the second fan cover 10 are provided with matching buckle structures. A drive structure is provided on the column 3. The first slider 5, the second slider 8, and the movable gripper 6 are all connected to the drive structure.

[0022] Both columns 3 are provided with axial sliding grooves 12, which are placed on opposite sides of the two columns 3. Slider 1 5 and slider 2 8 are both installed in the axial sliding grooves 12 and are slidably connected to them.

[0023] The drive structure includes a cylinder 13 connected to slider 15, a cylinder 2 14 connected to slider 28, and a cylinder 3 15 connected to movable gripper 6. Cylinder 13 is fixed on the lower end wall of the axial slide groove 12. Slider 15 and the piston rod of cylinder 13 are fixedly connected. Cylinder 2 14 is fixed on the upper end wall of the axial slide groove 12. Slider 28 and the piston rod of cylinder 2 14 are fixedly connected. Cylinder 3 15 is fixed on the opposite side of the two sliders 15. Movable gripper 6 and the piston rod of cylinder 3 15 are fixedly connected.

[0024] like Figure 3 As shown, the fan cover mounting ring 9 has several cavities 16 inside. The cavities 16 are arranged in a ring about the center line of the fan cover mounting ring 9. There is a push rod through hole 17 on the side wall of the cavity 16 near the center line of the fan cover mounting ring 9. A push rod 18 is slidably connected in the push rod through hole 17. A piston 19 is slidably connected inside the cavity 16. One end of the push rod 18 is placed inside the cavity 16 and fixed to one side of the piston 19. The other end of the push rod 18 passes through the push rod through hole 17 and is placed inside the fan cover mounting ring 9 and connected to the fan cover 10. There is also a spring 20 inside the cavity 16. One end of the spring 20 is connected to the other side of the piston 19. The other end of the spring 20 is connected to the side wall of the cavity 16 away from the center line of the fan cover mounting ring 9. There is an oil passage hole 43 on the side wall of the cavity 16 away from the center line of the fan cover mounting ring 9.

[0025] like Figure 4 As shown, both the fan cover 1 4 and the fan cover 2 10 include an outer ring shell 21 and a central block 22. The central block 22 is placed inside the outer ring shell 21 and several connecting rods 23 are provided between the two. One end of the connecting rod 23 is installed on the inner side wall of the outer ring shell 21, and the other end of the connecting rod 23 is installed on the side wall of the central block 22. The connecting rods 23 are distributed in a ring about the central block 22. The side wall of the connecting rod 23 has guide vanes 24, and the fan shaft mounting hole 11 is placed on the central block 22.

[0026] like Figure 5 As shown, the snap-fit ​​structure includes a matching annular mounting groove 25 and an annular mounting strip 26. The annular mounting groove 25 is placed on the outer ring shell 21 of the fan cover 1 4 and is located at one end near the fan cover 2 10. The annular mounting strip 26 is placed on the outer ring shell 21 of the fan cover 2 10 and is located at one end near the fan cover 1 4. A snap-fit ​​27 is provided on the side wall of the annular mounting groove 25, and a snap-fit ​​groove 28 that matches the snap-fit ​​27 is provided on the annular mounting strip 26.

[0027] like Figure 6As shown, the center block 22 has a cavity 29 inside, and an automatic blade opening and closing mechanism is provided inside the cavity 29. The other end of the connecting rod 23 passes through the side wall of the center block 22 and is placed inside the cavity 29 and connected to the automatic blade opening and closing mechanism. The other end of the connecting rod 23 is rotatably connected to the center block 22. One end of the connecting rod 23 is provided with a connecting rod mounting groove 30. The inner wall of the outer ring shell 21 is provided with a mounting post 31 that matches the connecting rod mounting groove 30. One end of the connecting rod 23 is mounted on the inner wall of the outer ring shell 21 through the cooperation of the connecting rod mounting groove 30 and the mounting post 31 and is rotatably connected to it.

[0028] The fan shaft mounting hole 11 is located on one end wall of cavity 29 and on the opposite side of the two center blocks 22. A fixing post 32 is provided on the other end wall of cavity 29. The center line of the fixing post 32 and the center line of the fan shaft mounting hole 11 are on the same straight line. The length of the fixing post 32 is less than the distance between the two end walls of cavity 29. The automatic blade opening and closing mechanism includes a rotating tube 33 sleeved on the outside of the fixing post 32. The rotating tube 33 and the fixing post 32 are rotatably connected. The length of the rotating tube 33 is equal to the distance between the two end walls of cavity 29. The inner diameter of the rotating tube 33 is greater than the diameter of the fan shaft mounting hole 11. The other end of the connecting rod 23 is distributed in a ring shape on the outside of the rotating tube 33. A bevel gear 34 is sleeved on the outside of the tube 33. The bevel gear 34 is fixedly connected to the rotating tube 33. A bevel gear 35 is sleeved on the other end of the connecting rod 23. The bevel gear 35 is fixedly connected to the connecting rod 23. All bevel gears 35 mesh with bevel gear 34. A flexible friction ring 36 is fixed on the inner wall of the rotating tube 33. The center line of the flexible friction ring 36 and the center line of the rotating tube 33 are on the same straight line. The flexible friction ring 36 is placed between the fan shaft mounting hole 11 and the fixed post 32. The inner diameter of the flexible friction ring 36 matches the outer diameter of the fan shaft 7. A side plate 37 is fixed on the outer wall of the rotating tube 33. The side plate 37 and the inner wall of the cavity 29 are connected by a spring 38.

[0029] The flexible friction ring 36 can be made of rubber.

[0030] Both ends of the fan shaft 7 are provided with rounded corners.

[0031] like Figure 7 As shown, a rotary motor 39 is installed on the central block 22 of the fan cover 2 10. The rotary motor 39 is provided with a motor shaft 40. The end face of the fixing column 32 and the side wall of the cavity 2 29 are provided with motor shaft through holes 41 that match the motor shaft 40. The motor shaft 40 is placed inside the motor shaft through hole 41 and its end passes through the motor shaft through hole 41. The end face of the fan shaft 7 is provided with a motor shaft mounting groove 42 that matches the end of the motor shaft 40.

[0032] Before assembly, first place the fan cover 4 in the fan cover 1 placement slot 2, then place the fan shaft 7 between the two movable grippers 6. The movable grippers 6 are moved by the cylinder 3 15, automatically clamping and fixing the fan shaft 7 directly above the fan cover 4 (the bottom end of the fan shaft 7 is aligned with the fan shaft mounting hole 11 on the fan cover 4). Then, place the fan cover 2 10 into the fan cover 2 mounting ring 9 (the top end of the fan shaft 7 is aligned with the fan shaft mounting hole 11 on the fan cover 2 10). At this time, the pressure oil control mechanism inputs pressure oil into all the chambers 16 through the oil passage 43, thereby driving the piston 19 and its push rod 18 to push against the fan cover 2 10 from all sides (the spring 20 is stretched), fixing the fan cover 2 10 to the inside of the fan cover 2 mounting ring 9.

[0033] During assembly, cylinder 13 first controls slider 5 to move downwards, automatically inserting the bottom end of fan shaft 7 into fan shaft mounting hole 11 on fan cover 4. Then, cylinder 3 15 controls movable gripper 6 to automatically reset, releasing fan shaft 7. Finally, cylinder 2 14 controls slider 2 8 to move downwards, automatically covering fan cover 2 10 onto fan cover 4 (at this time, the snap-fit ​​structure on fan cover 4 and fan cover 2 10 automatically locks in place), and the top end of fan shaft 7 automatically inserts into fan shaft mounting hole 11 on fan cover 2 10, completing the assembly. After the fan is assembled, the pressure oil in chamber 16 is controlled to return through the pressure oil control mechanism. At this time, piston 19 and its push rod 18 will automatically reset under the elastic force of spring 20, releasing fan cover 2 10.

[0034] How a fan works: When the fan is not working, the guide vanes 24 on the connecting rod 23 are positioned to block the gap between adjacent connecting rods 23, and the entire fan is in a closed state, as shown in the figure. Figure 9 As shown; when the fan starts working, the fan shaft 7 begins to rotate. Initially, due to the contact between the side wall of the fan shaft 7 and the flexible friction ring 36, the rotating tube 33 will rotate synchronously with the fan shaft 7 under the action of friction (during this process, the second spring 38 will be stretched, and the pulling force on the rotating tube 33 from the second spring 38 will gradually increase). During the rotation of the rotating tube 33, through the transmission of the first bevel gear 34 and the second bevel gear 35, all the connecting rods 23 and the guide vanes 24 on them will rotate simultaneously, thereby causing the gap between adjacent connecting rods 23 to slowly open. When the sliding friction between the fan shaft 7 and the flexible friction ring 36 is equal to the elastic force of the second spring 38 on the rotating tube 33 (side plate 37), the rotating tube 33 stops rotating. At this time, the gap between adjacent connecting rods 23 is just in a fully open state, as shown in the figure. Figure 8 As shown.

Claims

1. An automatic assembly device for a fan, characterized in that, Includes a base (1), on which a fan cover placement slot (2) and two columns (3) are provided. The two columns (3) are placed on both sides of the fan cover placement slot (2). A fan cover (4) is provided in the fan cover placement slot (2). Each of the two columns (3) is provided with a slider (5). The slider (5) is installed on the opposite side of the two columns (3) and the two are slidably connected. Each of the two sliders (5) is provided with a movable gripper (6). The movable gripper (6) is installed on the opposite side of the two sliders (5) and the two are movably connected. A fan shaft (7) is provided between the two movable grippers (6). The fan shaft (7) is placed on... Above the fan cover (4), two columns (3) are also provided with sliders (8). The sliders (8) are installed on the opposite side of the two columns (3) and are slidably connected. A fan cover mounting ring (9) is fixedly connected between the two sliders (8). A fan cover (10) is provided on the inner side of the fan cover mounting ring (9). The fan cover (10) is placed directly above the fan shaft (7). Both the fan cover (4) and the fan cover (10) are provided with fan shaft mounting holes (11). The two fan shaft mounting holes (11) are respectively matched with the two ends of the fan shaft (7). The fan cover (4) and the fan cover (10) are respectively provided with fan shaft mounting holes (11). 0) On the opposite side, there are matching buckle structures. The column (3) is provided with a driving structure. The slider one (5), slider two (8), and movable clamp (6) are all connected to the driving structure. The fan cover two mounting ring (9) has several cavities one (16) inside. The cavities one (16) are distributed in a ring about the center line of the fan cover two mounting ring (9). The side wall of the cavity one (16) near the center line of the fan cover two mounting ring (9) is provided with a top rod through hole (17). A top rod (18) is slidably connected in the top rod through hole (17). A piston (19) is slidably connected inside the cavity one (16). One end of the rod (18) is placed inside the cavity (16) and fixed on one side of the piston (19). The other end of the push rod (18) passes through the push rod through hole (17) and is placed inside the fan cover second mounting ring (9) and connected to the fan cover second (10). The cavity (16) is also provided with a spring (20). One end of the spring (20) is connected to the other side of the piston (19). The other end of the spring (20) is connected to the side wall of the cavity (16) away from the center line of the fan cover second mounting ring (9). The side wall of the cavity (16) away from the center line of the fan cover second mounting ring (9) is provided with an oil passage hole (43).

2. The automatic assembly device for a fan according to claim 1, characterized in that, Both columns (3) are provided with axial grooves (12). The axial grooves (12) are placed on the opposite side of the two columns (3). The slider one (5) and slider two (8) are both installed in the axial grooves (12) and are slidably connected to them.

3. The automatic assembly device for a fan according to claim 2, characterized in that, The drive structure includes a cylinder 1 (13) connected to a slider 1 (5), a cylinder 2 (14) connected to a slider 2 (8), and a cylinder 3 (15) connected to a movable gripper (6). The cylinder 1 (13) is fixed on the lower end wall of the axial slide groove (12). The piston rods of the slider 1 (5) and the cylinder 1 (13) are fixedly connected. The cylinder 2 (14) is fixed on the upper end wall of the axial slide groove (12). The piston rods of the slider 2 (8) and the cylinder 2 (14) are fixedly connected. The cylinder 3 (15) is fixed on the opposite side of the two sliders 1 (5). The movable gripper (6) and the piston rod of the cylinder 3 (15) are fixedly connected.

4. An automatic fan assembly device according to any one of claims 1 to 3, characterized in that, Both the first fan cover (4) and the second fan cover (10) include an outer ring shell (21) and a central block (22). The central block (22) is located inside the outer ring shell (21) and there are several connecting rods (23) between them. One end of the connecting rod (23) is installed on the inner side wall of the outer ring shell (21), and the other end of the connecting rod (23) is installed on the side wall of the central block (22). The connecting rods (23) are distributed in a ring about the central block (22). There are air guide blades (24) on the side wall of the connecting rod (23). The fan shaft mounting hole (11) is located on the central block (22).

5. The automatic assembly device for a fan according to claim 4, characterized in that, The buckle structure includes a matching annular mounting groove (25) and an annular mounting strip (26). The annular mounting groove (25) is placed on the outer ring shell (21) of the first fan cover (4) and located at one end near the second fan cover (10). The annular mounting strip (26) is placed on the outer ring shell (21) of the second fan cover (10) and located at one end near the first fan cover (4). The side wall of the annular mounting groove (25) is provided with a buckle (27), and the annular mounting strip (26) is provided with a buckle groove (28) that matches the buckle (27).

6. The automatic assembly device for a fan according to claim 4, characterized in that, The center block (22) has a cavity two (29) inside, and the cavity two (29) has an automatic blade opening and closing mechanism. The other end of the connecting rod (23) passes through the side wall of the center block (22) and is placed in the cavity two (29) and connected to the automatic blade opening and closing mechanism. The other end of the connecting rod (23) is rotatably connected to the center block (22). One end of the connecting rod (23) is provided with a connecting rod mounting groove (30). The inner wall of the outer ring shell (21) is provided with a mounting post (31) that matches the connecting rod mounting groove (30). One end of the connecting rod (23) is installed on the inner wall of the outer ring shell (21) through the cooperation of the connecting rod mounting groove (30) and the mounting post (31) and is rotatably connected to it.

7. An automatic fan assembly device according to claim 6, characterized in that, The fan shaft mounting hole (11) is located on one side of the end wall of cavity two (29) and on the opposite side of the two center blocks (22). A fixing post (32) is provided on the other side of the end wall of cavity two (29). The center line of the fixing post (32) and the center line of the fan shaft mounting hole (11) are on the same straight line. The length of the fixing post (32) is less than the distance between the two end walls of cavity two (29). The automatic blade opening and closing mechanism includes a rotating tube (33) sleeved on the outside of the fixing post (32). The rotating tube (33) and the fixing post (32) are rotatably connected. The length of the rotating tube (33) is equal to the distance between the two end walls of cavity two (29). The inner diameter of the rotating tube (33) is greater than the diameter of the fan shaft mounting hole (11). The other end of the connecting rod (23) is distributed in a ring on the outside of the rotating tube (33). A bevel gear (34) is fitted on the outer side of the rotating tube (33), and the bevel gear (34) is fixedly connected to the rotating tube (33). A bevel gear (35) is fitted on the other end of the connecting rod (23), and the bevel gear (35) is fixedly connected to the connecting rod (23). All bevel gears (35) mesh with bevel gears (34). A flexible friction ring (36) is fixed on the inner wall of the rotating tube (33). The center line of the flexible friction ring (36) and the center line of the rotating tube (33) are on the same straight line. The flexible friction ring (36) is placed between the fan shaft mounting hole (11) and the fixed column (32). The inner diameter of the flexible friction ring (36) matches the outer diameter of the fan shaft (7). A side plate (37) is fixed on the outer wall of the rotating tube (33). The side plate (37) and the inner wall of the cavity (29) are connected by a spring (38).

8. An automatic fan assembly device according to claim 7, characterized in that, The fan shaft (7) has rounded corners at both ends of its edges.

9. An automatic fan assembly device according to claim 7, characterized in that, A rotary motor (39) is installed on the center block (22) of the second fan cover (10). The rotary motor (39) is provided with a motor shaft (40). The end face of the fixed column (32) and the side wall of the second cavity (29) are provided with motor shaft through holes (41) that match the motor shaft (40). The motor shaft (40) is placed inside the motor shaft through hole (41) and its end passes through the motor shaft through hole (41). The end face of the fan shaft (7) is provided with a motor shaft mounting slot (42) that matches the end of the motor shaft (40).

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