Fan blade safety empennage of axial fan

Abstract

The invention relates to the field of industrial manufacturing and production, in particular to an axial fan blade safety empennage which comprises a mounting disc, a connecting seat is arranged on one side of the mounting disc, a dust cover is mounted on the side, away from the mounting disc, of the connecting seat in a clamped mode, and fan blades in an annular array are mounted on the outer side of the connecting seat through bolts. A tail wing plate is arranged on the side, away from the connecting base, of each fan blade, a mounting frame is mounted on one side of each tail wing plate in a clamped mode, the mounting frame is of an L-shaped structure, and a clamping groove matched with the mounting frame is formed in the end, away from the connecting base, of each fan blade. The installation of the empennage plate is rapidly completed, the time required by the installation of a single fan empennage is greatly shortened, the production efficiency is remarkably improved, the whole installation process is cooperatively completed by the synchronous driving device, the tedious step of manually installing bolts one by one is avoided, a standardized installation process is formed, and time waste caused by manual operation differences is reduced.

Description

Technical Field

[0001] The invention relates to the field of industrial manufacturing, and in particular to a safety tail wing of an axial flow fan blade. Background Art

[0002] A fan is a device that generates airflow by driving the blades to rotate through a motor. In hot weather, it accelerates the flow of air on the human body surface, making people feel cool. Common types of fans include axial flow fans, centrifugal fans, mixed flow fans and cross-flow fans. The working principle of axial flow fans is that the airflow flows along the axis of the fan. They are widely used in electronic equipment, ventilation systems and industrial production. Many industrial production processes require good ventilation and heat dissipation conditions. Axial flow fans are one of the commonly used devices. In order to balance the force distribution of the blades, reduce the swing and distortion of the blades, and enhance the overall operating stability of the fan, it is necessary to install a safety tail on the axial flow fan blades to prevent the blades from fatigue cracking or even breaking due to long-term unstable vibration.

[0003] In the ventilation system of a large factory, the large aluminum alloy axial flow fan blades used are manually installed with safety tail wings with bolts, which can reduce the vibration and shaking of the fan when it rotates at high speed and make the fan run more smoothly. However, manual installation of bolts is a time-consuming task. Each fan needs to be installed with multiple bolts one by one, which will greatly reduce production efficiency. Secondly, due to the subjectivity of manual operation, there may be inconsistencies in the installation torque and tightening degree of the bolts. The inconsistency of manual installation may cause some bolts to be installed loosely, which may easily loosen during long-term high-speed rotation of the fan, affecting the function of the tail wing and even causing safety accidents.

[0004] Therefore, it is necessary to propose an axial flow fan blade safety tail to solve the above technical problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an axial flow fan blade safety tail wing, which solves the technical problem that in a ventilation system of a large factory, large aluminum alloy axial flow fan blades are manually installed with bolts to install the safety tail wing, which is time-consuming and leads to low production efficiency, and the subjectivity of manual operation causes inconsistent and loose bolt installation, which may cause safety accidents.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The technical solution adopted by the present invention to solve the technical problem is: an axial flow fan blade safety tail, comprising a mounting plate, a connecting seat is arranged on one side of the mounting plate, a dust cover is clamped and installed on the side of the connecting seat away from the mounting plate, a ring-shaped array of fan blades are installed on the outer side of the connecting seat by bolts, and a tail plate is arranged on the side of the fan blade away from the connecting seat; A mounting frame is mounted on one side of the tail wing plate, the mounting frame is in an L-shaped structure, and a slot adapted to the mounting frame is provided at one end of the fan blade away from the connecting seat; A linkage groove is formed at one end of each group of blades away from the connecting seat. The linkage groove is connected to the clamping slot. A linkage extrusion seat that can move along the clamping slot is slidably connected in the linkage groove.

[0007] The synchronous driving device is arranged on the inner side of the connecting seat and is used to drive a plurality of linked extrusion seats to extrude along the mounting frame.

[0008] Preferably, the synchronous driving device includes a synchronous gear rotatably connected to the inner side of the connecting seat, and the synchronous gear and the fan blades correspond one to one, and a threaded cylinder rotatably connected to the inner side of the fan blade is installed at one end of the synchronous gear away from the central axis of the connecting seat, and a threaded rod is threadedly connected to the end of the threaded cylinder away from the synchronous gear, and the end of the threaded rod away from the threaded cylinder is rotatably connected to the linkage extrusion seat, and the linkage extrusion seat is tightly attached to the vertical end of the mounting frame, and a driving wheel meshing with the synchronous gear is rotatably connected to the inner side of the connecting seat, and a connecting cylinder clamped and installed with the driving wheel is rotatably connected to the mounting plate, and the connecting cylinder faces away from the mounting plate. A rotating plate is clamped and installed on one side of the mounting plate, and a driving cylinder is installed on the end of the rotating plate facing away from the connecting cylinder, a hexagonal groove is provided inside the driving cylinder, a pair of spring rods are slidably connected to the dust cover, one end of the pair of spring rods extends out of the outside of the dust cover and a connecting plate is installed between them, a notch matching the driving cylinder is provided on the inner side of the connecting plate, one end of the spring rod extends into the inner side of the dust cover and a locking block is installed, a moving seat is installed on the end of the rotating plate facing away from the connecting cylinder, a locking hole is provided on the end of the moving seat facing away from the rotating plate, and an anti-vibration component for preventing vibration of the synchronous gear is provided on the inner side of the connecting cylinder.

[0009] Preferably, a tapered groove is provided on one side of the vertical end of the mounting frame, and a tapered shape matching the tapered groove is provided on the end of the linkage extrusion seat facing away from the threaded rod, and a rubber pad is detachably installed on the inner wall of the tapered groove of the mounting frame.

[0010] Preferably, a limiting groove is provided at one end of the tail wing plate close to the fan blade, and the limiting groove is a triangular groove. The end of the fan blade close to the tail wing plate is set as a triangular pointed structure, a magnet plate is installed at the vertical end of the mounting frame, and a magnetic disk attracted to the magnet plate is installed at one end of the side wall of the linkage groove.

[0011] Preferably, a pair of limiting slide rail seats are installed at one end of the connecting seat facing away from the mounting plate, and baffles are installed at both ends of the pair of limiting slide rail seats. The end of the movable seat away from the central axis of the rotating plate is connected to the limiting slide rail seat through a slide rail. The end of the connecting seat facing away from the mounting plate is rotatably connected to a pair of rotating columns, and compression springs are connected between the pair of rotating columns and the two movable seats respectively.

[0012] Preferably, the travel of the movable seat on the limiting slide rail seat is equal to the travel of the linkage extrusion seat extending from the conical groove.

[0013] Preferably, the anti-vibration assembly includes a driving plate installed in the middle of the connecting tube, the driving plate is provided with driving grooves in an annular array, a fixing seat is installed in the middle of the mounting plate and on the inner side of the connecting tube, the fixing seat is connected to a driving block at one end close to the driving groove through a slide rail, an avoidance groove is provided at one end of the connecting tube corresponding to the driving block, each group of driving blocks and fan blades correspond to each other one by one, a shockproof part is provided at one end of the driving block away from the central axis of the fixing seat, the shockproof part is tightly attached to the side wall of the synchronous gear, and a positioning block slidably connected to the inner side of the driving groove is installed at one end of the driving block facing away from the shockproof part.

[0014] Preferably, the shockproof component includes a shockproof plate that is snap-fitted onto one end of the driving block, the outer side of the shockproof plate is slidably connected to a shockproof sleeve, an expansion spring is connected between the shockproof sleeve and the shockproof plate, and the end of the shockproof sleeve close to the synchronous gear is rotatably connected to a shockproof rubber pad that extends into the inner side of the synchronous gear.

[0015] Beneficial effects: (1) The present invention can drive multiple linkage extrusion seats to move simultaneously at one time by setting a synchronous drive device, so as to quickly complete the installation of the tail wing plate, greatly shorten the time required for installing a single fan tail wing, and significantly improve production efficiency. The entire installation process is completed by the synchronous drive device, avoiding the tedious steps of manually installing bolts one by one, forming a standardized installation process, and reducing the time waste caused by differences in manual operations; (2) The present invention ensures that the force applied by each linkage extrusion seat is the same by setting a synchronous drive device, thereby achieving consistency in installation torque and tightening degree, avoiding differences caused by different strength and habits in manual operation, and setting the travel of the moving seat on the limit slide seat and the travel of the linkage extrusion seat extending from the conical groove to be equal, so that the two move according to equal travel, which can achieve precise control of the tail wing installation process and ensure the consistency and accuracy of each installation action. This equal travel design makes the structure of the entire device more compact and reasonable, and reduces unnecessary space and components; (3) The present invention makes the shockproof part fit more closely to the side wall of the synchronous gear through the synergistic effect of the driving plate, the positioning block, the driving block and the shockproof part, effectively suppresses the vibration of the synchronous gear, and improves the stability of the fan operation. Through the combination of the shockproof sleeve, the expansion spring and the shockproof rubber pad, a multi-level buffering and shock absorption effect is provided, which adapts to the change of the surface shape of the synchronous gear, ensures a close fit, and improves the shockproof effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the fan blade and tail wing plate of the present invention; Figure 3 It is a combined cross-sectional view of the fan blade and tail wing plate of the present invention; Figure 4 It is a schematic diagram of the synchronous drive device of the present invention; Figure 5 It is a schematic diagram of the synchronous gear and the driving wheel of the present invention; Figure 6 It is a schematic diagram of the position-limiting slide rail seat, the rotating column and the compression spring of the present invention; Figure 7 is a schematic diagram of the anti-vibration assembly of the present invention; Figure 8 for Figure 7 A partial enlarged view of middle A; Fig. 9 for Figure 5 A partial enlarged view of B in the middle; Fig.10 for Figure 7 A partial enlarged view of C in the middle.

[0018] In the figure: 1, mounting plate; 10, connecting seat; 11, dust cover; 12, fan blade; 120, linkage slot; 121, linkage extrusion seat; 13, tail plate; 130, limit slot; 131, mounting frame; 132, card slot; 1321, magnet plate; 133, tapered slot; 2. Synchronous drive device; 21. Synchronous gear; 22. Threaded cylinder; 23. Threaded rod; 24. Driving wheel; 25. Connecting cylinder; 250. Avoidance groove; 26. Rotating plate; 27. Driving cylinder; 28. Spring rod; 29. ​​Connecting plate; 291. Locking block; 292. Moving seat; 293. Locking hole; 211. Limiting slide rail seat; 212. Rotating column; 213. Compression spring; 221. Shockproof component; 222. Driving plate; 223. Driving groove; 224. Fixed seat; 225. Driving block; 226. Shockproof part; 2261. Shockproof plate; 2262. Shockproof sleeve; 2263. Shockproof rubber pad; 227. Positioning block. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0020] like Figure 1-Figure 6As shown, an axial flow fan blade safety tail comprises a mounting plate 1, a connecting seat 10 is arranged on one side of the mounting plate 1, a dust cover 11 is clamped and installed on the side of the connecting seat 10 away from the mounting plate 1, a ring-shaped array of fan blades 12 are installed on the outer side of the connecting seat 10 by bolts, a tail plate 13 is arranged on the side of the fan blade 12 away from the connecting seat 10, a mounting frame 131 is clamped and installed on one side of the tail plate 13, the mounting frame 131 is in an L-shaped structure, a slot 132 adapted to the mounting frame 131 is opened at one end of the fan blade 12 away from the connecting seat 10, and each group of fan blades 12 away from the connecting seat 10 is provided with a mounting frame 131. A linkage groove 120 is provided at one end of the seat 10, and the linkage groove 120 is connected to the card slot 132. A linkage extrusion seat 121 that can move along the card slot 132 is slidably connected in the linkage groove 120. The synchronous drive device 2 is arranged on the inner side of the connecting seat 10 and is used to drive multiple linkage extrusion seats 121 to extrude along the mounting frame 131. The synchronous drive device 2 includes a synchronous gear 21 that is rotatably connected to the inner side of the connecting seat 10, and the synchronous gear 21 and the fan blade 12 correspond to each other one by one. The synchronous gear 21 is installed at one end away from the central axis of the connecting seat 10 and is rotatably connected to the inner side of the fan blade 12. The threaded cylinder 22 has a threaded rod 23 at one end of the threaded cylinder 22 away from the synchronous gear 21, and the end of the threaded rod 23 away from the threaded cylinder 22 is rotatably connected to the linkage extrusion seat 121. The linkage extrusion seat 121 is tightly attached to the vertical end of the mounting frame 131. The inner side of the connecting seat 10 is rotatably connected to a driving wheel 24 meshing with the synchronous gear 21. The mounting plate 1 is rotatably connected to a connecting cylinder 25 that is clamped and installed with the driving wheel 24. The connecting cylinder 25 is a through-type structure. A rotating plate 26 is clamped and installed on the side of the connecting cylinder 25 that is away from the mounting plate 1. The rotating plate 26 is away from the side of the connecting cylinder 25. A driving cylinder 27 is installed at the end, and a hexagonal groove is provided inside the driving cylinder 27. A pair of spring rods 28 are slidably connected to the dust cover 11, and a connecting plate 29 is installed between one end of the pair of spring rods 28 extending out of the outside of the dust cover 11. A notch matching the driving cylinder 27 is provided on the inner side of the connecting plate 29, and one end of the spring rod 28 extends into the inner side of the dust cover 11 and a locking block 291 is installed. A moving seat 292 is installed on the end of the rotating plate 26 facing away from the connecting cylinder 25, and a locking hole 293 is provided on the end of the moving seat 292 facing away from the rotating plate 26, and an oblique groove is provided on the side wall of the moving seat 292.

[0021] It should be noted that, first, when the tail wing plate 13 needs to be installed, the mounting frame 131 of the tail wing plate 13 is clamped into the clamping groove 132 at one end of the fan blade 12, and then, an external tool (such as a hexagonal wrench) is inserted into the hexagonal groove inside the driving cylinder 27, and the external tool is rotated to drive the driving cylinder 27 to rotate. The rotation of the driving cylinder 27 will drive the rotating plate 26 to rotate, and then drive the connecting cylinder 25 to rotate. The rotation of the connecting cylinder 25 causes the driving wheel 24 clamped and installed therewith to rotate, and the driving wheel 24 is meshed with the synchronous gear 21, thereby driving the synchronous gear 21 to rotate. When the synchronous gear 21 rotates, it drives the threaded cylinder 22 to rotate. Since the threaded cylinder 22 is engaged with the threaded rod 2 3 threaded connection, the rotation of the threaded barrel 22 causes the threaded rod 23 to move along the axial direction of the threaded barrel 22, and the movement of the threaded rod 23 pushes the linkage extrusion seat 121 to move in the linkage groove 120 along the direction of the card groove 132, and is closely attached to the vertical end of the mounting frame 131, so that the plurality of linkage extrusion seats 121 simultaneously extrudes the mounting frame 131, thereby realizing the firm installation of the tail wing plate 13 on the fan blade 12. In this process, due to the action of the synchronous drive device 2, the plurality of linkage extrusion seats 121 can act synchronously, ensuring the consistent fastening degree of each mounting point, and avoiding the problems of inconsistent torque and loose installation that may occur in manual installation; If there is no synchronous drive device 2, manually tightening the bolts one by one may cause some bolts to be over-tightened and others to be under-tightened due to differences in strength or operating habits of different operators. The synchronous drive device 2 can ensure that the force applied by each linkage extrusion seat 121 is the same, just like performing the same degree of processing on multiple identical components at the same time on a production line, thereby ensuring the consistency and stability of the installation.

[0022] When the driving cylinder 27 rotates clockwise, the locking block 291 will contact the inclined groove, and when it contacts along the side wall of the inclined groove, it will drive the locking block 291 to move. At this time, the spring of the spring rod 28 is compressed until the locking block 291 moves inside the locking hole 293 and locks, thereby ensuring the stability and safety of the synchronous drive device 2 during operation.

[0023] like Figure 2-3 As shown in the figure, a conical groove 133 is provided on one side of the vertical end of the mounting frame 131, and a conical shape matching the conical groove 133 is provided on the end of the linkage extrusion seat 121 facing away from the threaded rod 23. A rubber pad is detachably installed on the inner wall of the conical groove 133 of the mounting frame 131.

[0024] It should be noted that when the linkage extrusion seat 121 is pushed by the threaded rod 23 to move toward the mounting frame 131, its tapered end will be inserted into the tapered groove 133 of the mounting frame 131. Since the shapes of the two are compatible, a close fit can be achieved, and the contact area and friction can be increased, thereby better fixing the mounting frame 131. At the same time, when the mounting frame 131 and the linkage extrusion seat 121 are in contact, the removable rubber pad on the inner wall of the tapered groove 133 can further increase the stability. The rubber pad can also play a buffering role, reducing the impact of vibration and impact on the connection part, while protecting the mounting frame 131 and the linkage extrusion seat 121, and avoiding wear and damage caused by rigid collision. When the rubber pad loses its plasticity in the later stage, it can be quickly removed from the inner wall of the tapered groove 133, which is convenient for replacement when it is worn or aged, so as to maintain good performance.

[0025] like Figure 2-3 As shown in the figure, a limiting groove 130 is opened at one end of the tail wing plate 13 close to the fan blade 12, and the limiting groove 130 is a triangular groove. The end of the fan blade 12 close to the tail wing plate 13 is set to a triangular pointed structure, and a magnet plate 1321 is installed at the vertical end of the mounting frame 131, and a magnetic disk attracted to the magnet plate 1321 is installed at one end of the side wall of the linkage groove 120.

[0026] It should be noted that when installing the tail wing plate 13, the limiting groove 130 (triangular groove) on the tail wing plate 13 cooperates with the triangular pointed structure at one end of the fan blade 12 to play a preliminary positioning role, ensuring that the tail wing plate 13 can quickly and accurately find the correct position during installation. At the same time, the magnet plate 1321 at the end of the vertical end of the mounting frame 131 and the magnetic disk at one end of the side wall of the linkage groove 120 attract each other, providing a certain adsorption force during the installation process to assist in maintaining the stability of the installation. The cooperation between the limiting groove 130 and the triangular pointed structure can enable the tail wing plate 13 to quickly align with the installation position, reduce the adjustment time during the installation process, and improve the installation efficiency. The mutual attraction between the magnet plate 1321 and the magnetic disk provides additional holding force for the installed structure, which is convenient for rapid installation through the synchronous drive device 2 at a later stage. The installer can complete the installation of the tail wing plate 13 more easily and quickly, reducing the difficulty of operation.

[0027] like Figure 5-Figure 6 As shown, a pair of limiting slide rail seats 211 are installed at one end of the connecting seat 10 facing away from the mounting plate 1, and baffles are installed at both ends of the pair of limiting slide rail seats 211. The movable seat 292 is connected to the limiting slide rail seat 211 at one end away from the central axis of the rotating plate 26 through the slide rail. The end of the connecting seat 10 facing away from the mounting plate 1 is rotatably connected to a pair of rotating columns 212, and compression springs 213 are connected between the pair of rotating columns 212 and the two movable seats 292 respectively.

[0028] It should be noted that one end of the moving seat 292 cooperates with the limiting slide rail seat 211 through the slide rail, so that the moving seat 292 can move smoothly along the path defined by the limiting slide rail seat 211. When the device is working, the force generated will be transmitted to the moving seat 292, causing it to slide on the slide rail. The compression spring 213 connected to the rotating column 212 is stretched when the moving seat 292 moves, thereby generating an elastic force. The purpose of this elastic force is, first, to ensure that a certain contact pressure is maintained between the moving seat 292 and the locking block 291 to prevent looseness or poor contact, thereby ensuring the normal operation and working performance of the device. Second, the elastic force of the compression spring 213 can pull the stretched moving seat 292 back to the initial position to prepare for the next operation, thereby realizing the automatic reset function of the device.

[0029] like Figure 3 and Figure 6 As shown, the travel of the movable seat 292 on the limiting slide rail seat 211 is equal to the travel of the linkage extrusion seat 121 extending from the tapered groove 133 .

[0030] It should be noted that when the movable seat 292 moves on the limiting slide rail seat 211, the distance it moves is the same as the distance that the linkage extrusion seat 121 extends from the conical groove 133, which means that their movements are synchronous and coordinated. During operation, the angular stroke of the hand-driven driving cylinder 27 can indirectly drive the linkage extrusion seat 121 to enter the conical groove 133, so that the two move according to equal strokes, which can achieve precise control of the tail wing installation process and ensure the consistency and accuracy of each installation action. This equal stroke design makes the structure of the entire device more compact and reasonable, and reduces unnecessary space and components.

[0031] like Figure 7-Figure 9 As shown, an anti-vibration component 221 for preventing the synchronous gear 21 from vibrating is provided on the inner side of the connecting cylinder 25, and the anti-vibration component 221 includes a driving plate 222 installed in the middle of the connecting cylinder 25, and a driving groove 223 in a ring array is opened inside the driving plate 222. A fixing seat 224 is installed in the middle of the mounting plate 1 and is clamped and installed on the inner side of the connecting cylinder 25. The end of the fixing seat 224 close to the driving groove 223 is connected with a driving block 225 through a slide rail. An avoidance groove 250 is opened at one end of the connecting cylinder 25 corresponding to the driving block 225. Each group of driving blocks 225 corresponds to the fan blades 12 one by one. An anti-vibration piece 226 is provided at one end of the driving block 225 away from the central axis of the fixing seat 224. The anti-vibration piece 226 is tightly attached to the side wall of the synchronous gear 21, and a positioning block 227 slidably connected to the inner side of the driving groove 223 is clamped and installed at one end of the driving block 225 facing away from the anti-vibration piece 226.

[0032] It should be noted that when the fan generates vibration during operation, the vibration will be transmitted to the synchronous gear 21, and multiple sets of synchronous gears 21 will generate a small rotation and vibration on the driving wheel 24. When the synchronous drive device 2 causes the connecting tube 25 to rotate in the forward direction, the driving plate 222 fixedly connected thereto will also rotate synchronously. During the rotation, the driving grooves 223 in a ring array on the driving plate 222 will generate an outward thrust on the positioning block 227. Because the positioning block 227 is clamped in the driving groove 223 and under its restriction, the positioning block 227 can only move along the direction specified by the driving groove 223, that is, away from the center axis of the driving plate 222.

[0033] At this time, the driving block 225 connected to the positioning block 227 can only move linearly along the slide rail under the guidance of the slide rail of the fixing seat 224. In this way, the driving block 225 will bring the shockproof member 226 close to the side wall of the synchronous gear 21 and cling to it; During forward rotation, the shock-absorbing component 226 is more closely fitted to the side wall of the synchronous gear 21, thereby enhancing the vibration suppression effect of the synchronous gear 21 and improving the reliability of shockproofing. The position and fit of the shock-absorbing component 226 can be adjusted in real time according to the action of the synchronous drive device 2, and possible vibration changes can be responded to in time without the need for additional control mechanisms, thereby simplifying the system structure.

[0034] like Figure 9-10 As shown, the shockproof component 226 includes a shockproof plate 2261 which is snap-fitted to one end of the driving block 225, a shockproof sleeve 2262 is slidably connected to the outer side of the shockproof plate 2261, an expansion spring is connected between the shockproof sleeve 2262 and the shockproof plate 2261, and an end of the shockproof sleeve 2262 close to the synchronous gear 21 is rotatably connected to a shockproof rubber pad 2263 extending into the inner side of the synchronous gear 21.

[0035] It should be noted that when the driving block 225 drives the shockproof part 226 to move toward the side wall of the synchronous gear 21, the shockproof rubber pad 2263 first contacts the synchronous gear 21. As the pressure increases, the shockproof sleeve 2262 will slide relative to the shockproof plate 2261, compressing the expansion spring. The compression of the expansion spring produces a reverse elastic force, so that the shockproof sleeve 2262 and the shockproof rubber pad 2263 can fit more closely on the synchronous gear 21, providing buffering and shock absorbing effects. The sliding of the shockproof sleeve 2262 and the elasticity of the expansion spring enable the shockproof rubber pad 2263 to better adapt to the surface shape and slight changes of the synchronous gear 21, ensuring a close fit and improving the shockproof effect.

[0036] The working principle of the present invention is that when installing the tail wing plate 13, the mounting frame 131 of the tail wing plate 13 is first clamped one by one in the clamping groove 132 at one end of the fan blade 12, and then an external tool (such as a hexagonal wrench) is inserted into the hexagonal groove inside the driving cylinder 27 and rotated. The rotation of the driving cylinder 27 drives the rotating plate 26 and the connecting cylinder 25 to rotate, and then the driving wheel 24 clamped therewith rotates. The driving wheel 24 drives the synchronous gear 21 to rotate by meshing with the synchronous gear 21, and the synchronous gear 21 drives the threaded cylinder 22 to rotate, so that the threaded rod 23 moves axially, and pushes the linkage extrusion seat 121 to move in the linkage groove 120 and the clamping groove 132, close to the vertical end of the mounting frame 131, so as to realize the installation of the tail wing plate 13; When the driving cylinder 27 rotates clockwise, the locking block 291 contacts the inclined groove on the moving seat 292 and moves along its side wall, driving the locking block 291 to move upward, and the spring of the spring rod 28 is compressed until the locking block 291 enters the locking hole 293 to achieve locking, thereby ensuring the stability and safety of the operation of the synchronous driving device 2; During the installation process, the tapered end of the linkage extrusion seat 121 is inserted into the tapered groove 133 of the mounting frame 131 to increase the contact area and friction. The rubber pad in the tapered groove 133 further enhances the stability and buffering effect. The limiting groove 130 on the tail wing plate 13 cooperates with the triangular pointed structure at one end of the fan blade 12 for preliminary positioning. The magnet plate 1321 at the vertical end of the mounting frame 131 and the magnetic disk on the side wall of the linkage groove 120 attract each other to assist installation and maintain stability. When the fan is running and vibrates, the synchronous gear 21 may rotate and vibrate slightly. When the synchronous drive device 2 makes the connecting tube 25 rotate in the forward direction, the drive plate 222 rotates accordingly, and the drive slot 223 pushes the positioning block 227 to make the drive block 225 move along the slide rail of the fixed seat 224, driving the shockproof part 226 to be close to the side wall of the synchronous gear 21. The shockproof rubber pad 2263 in the shockproof part 226 first contacts the synchronous gear 21. As the pressure increases, the shockproof sleeve 2262 slides relative to the shockproof plate 2261 to compress the expansion spring, providing buffering and shock absorption, better adapting to the surface changes of the synchronous gear 21, and suppressing vibration.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An axial flow fan blade safety tail, comprising a mounting plate (1), characterized in that: A connecting seat (10) is provided on one side of the mounting plate (1); a dust cover (11) is mounted on the side of the connecting seat (10) away from the mounting plate (1); fan blades (12) in an annular array are mounted on the outer side of the connecting seat (10) by means of bolts; a tail wing plate (13) is provided on the side of the fan blades (12) away from the connecting seat (10); A mounting frame (131) is mounted on one side of the tail wing plate (13), the mounting frame (131) is in an L-shaped structure, and a slot (132) adapted to the mounting frame (131) is formed at one end of the fan blade (12) away from the connecting seat (10); A linkage groove (120) is formed at one end of each group of the fan blades (12) away from the connection seat (10); the linkage groove (120) is connected to the clamping groove (132); and a linkage extrusion seat (121) is slidably connected in the linkage groove (120) and can move along the clamping groove (132); A synchronous driving device (2) is arranged inside the connecting seat (10) and is used to drive the plurality of linked extrusion seats (121) to extrude along the mounting frame (131).

2. The axial flow fan blade safety tail wing according to claim 1, characterized in that; The synchronous drive device (2) comprises a synchronous gear (21) rotatably connected to the inner side of the connecting seat (10), and the synchronous gear (21) and the fan blade (12) correspond to each other one by one. A threaded cylinder (22) rotatably connected to the inner side of the fan blade (12) is installed at one end of the central axis of the synchronous gear (21) away from the connecting seat (10), and a threaded rod (23) is threadedly connected to the end of the threaded cylinder (22) away from the synchronous gear (21). The end of the threaded rod (23) away from the threaded cylinder (22) is rotatably connected to a linkage extrusion seat (121). The linkage extrusion seat (121) is tightly attached to the vertical end of the mounting frame (131). A driving wheel (24) meshing with the synchronous gear (21) is rotatably connected to the inner side of the connecting seat (10). A connecting cylinder (25) mounted in a clamping connection with the driving wheel (24) is rotatably connected to the mounting plate (1), and the connecting cylinder (25) faces away from the mounting plate (1). A rotating plate (26) is mounted on one side in a clamping manner. A driving cylinder (27) is mounted on one end of the rotating plate (26) facing away from the connecting cylinder (25). A hexagonal groove is formed inside the driving cylinder (27). A pair of spring rods (28) are slidably connected to the dust cover (11). A connecting plate (29) is mounted between one end of the pair of spring rods (28) extending out of the outside of the dust cover (11). A notch matching the driving cylinder (27) is formed on the inner side of the connecting plate (29). A locking block (291) is mounted on one end of the spring rod (28) extending into the inner side of the dust cover (11). A moving seat (292) is mounted on one end of the rotating plate (26) facing away from the connecting cylinder (25). A locking hole (293) is formed on one end of the moving seat (292) facing away from the rotating plate (26). An anti-vibration component (221) for preventing the synchronous gear (21) from vibrating is provided on the inner side of the connecting cylinder (25).

3. The axial flow fan blade safety tail wing according to claim 2, characterized in that: A conical groove (133) is provided on one side of the vertical end of the mounting frame (131); an end of the linkage extrusion seat (121) facing away from the threaded rod (23) is provided with a conical shape matching the conical groove (133); and a rubber pad is detachably mounted on the inner wall of the conical groove (133) of the mounting frame (131).

4. The axial flow fan blade safety tail wing according to claim 1, characterized in that: A limiting groove (130) is provided at one end of the tail wing plate (13) close to the fan blade (12), the limiting groove (130) being a triangular groove, and one end of the fan blade (12) close to the tail wing plate (13) being arranged as a triangular pointed structure, a magnet plate (1321) being installed at the end of the vertical end of the mounting frame (131), and a magnetic disk attracted to the magnet plate (1321) being installed at one end of the side wall of the linkage groove (120).

5. The axial flow fan blade safety tail wing according to claim 2, characterized in that: A pair of limiting slide rail seats (211) are installed at one end of the connecting seat (10) facing away from the mounting plate (1), and baffles are installed at both ends of the pair of limiting slide rail seats (211). The end of the movable seat (292) away from the central axis of the rotating plate (26) is connected to the limiting slide rail seat (211) through a slide rail. The end of the connecting seat (10) facing away from the mounting plate (1) is rotatably connected to a pair of rotating columns (212), and compression springs (213) are respectively connected between the pair of rotating columns (212) and the two movable seats (292).

6. The axial flow fan blade safety tail wing according to claim 5, characterized in that: The travel of the movable seat (292) on the limiting slide rail seat (211) is equal to the travel of the linkage extrusion seat (121) extending from the conical groove (133).

7. The axial flow fan blade safety tail wing according to claim 2, characterized in that: The anti-vibration assembly (221) comprises a driving plate (222) mounted in the middle of the connecting tube (25), the driving plate (222) having a ring-shaped array of driving grooves (223) formed therein, a fixing seat (224) being clamped and mounted in the middle of the mounting plate (1) and on the inner side of the connecting tube (25), one end of the fixing seat (224) close to the driving groove (223) being connected to a driving block (225) via a slide rail, and the connecting tube (25) corresponding to the driving block ( An avoidance groove (250) is provided at one end of the drive block (225), each group of drive blocks (225) and the fan blades (12) correspond to each other one by one, an end of the drive block (225) away from the central axis of the fixing seat (224) is provided with a shockproof member (226), the shockproof member (226) is tightly attached to the side wall of the synchronous gear (21), and an end of the drive block (225) facing away from the shockproof member (226) is clamped and installed with a positioning block (227) slidably connected to the inner side of the drive groove (223).

8. The axial flow fan blade safety tail wing according to claim 7, characterized in that: The shockproof member (226) comprises a shockproof plate (2261) mounted on one end of the driving block (225), a shockproof sleeve (2262) being slidably connected to the outer side of the shockproof plate (2261), an expansion spring being connected between the shockproof sleeve (2262) and the shockproof plate (2261), and a shockproof rubber pad (2263) extending into the inner side of the synchronous gear (21) being rotatably connected to the end of the shockproof sleeve (2262) close to the synchronous gear (21).

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