Shock-absorbing and noise-reducing axial flow fan

Abstract

The utility model belongs to axial flow fan technical field especially relates to shock absorption and noise reduction axial flow fan, it is inside equipped with outer cover to support, impeller is provided in the outer cover inside, the protective net is provided in the outer cover inside, and the protective net is located impeller front side, filter screen is provided in the outer cover inside back side, support plate is provided in the outer cover inside, motor is provided on support plate, and motor output shaft is connected with impeller, shock absorber is provided on support plate, and is cooperated with motor, is used for shock absorption and noise reduction to motor, wherein, the outer cover is composed of two half circle cover, forms a cylindrical outer cover, one of half circle cover is cut open, the other half circle cover inside is equipped with guide groove, and the half circle cover that cuts open is rotatably connected in the guide groove. The utility model provides a kind of shock absorption and noise reduction axial flow fan, and the fan cover can be opened, to facilitate the maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of axial flow fan technology, and particularly relates to vibration-damping and noise-reducing axial flow fans. Background Technology

[0002] Axial flow fans play an indispensable role in numerous fields such as industrial production, building ventilation, and equipment heat dissipation. As society's requirements for working environment comfort, equipment operation stability, and environmental protection continue to increase, vibration reduction and noise reduction have become one of the core directions for the design and improvement of axial flow fans. Traditional axial flow fans often generate significant noise and vibration during operation due to factors such as the interaction between the high-speed rotation of the impeller and the air, vibrations from the motor, and friction between components. This noise not only negatively impacts the physical and mental health of operators, but long-term vibration can also lead to loose connections in the fan itself and surrounding equipment, accelerated wear of components, shortened equipment lifespan, and even disruption of the normal operation of the production system.

[0003] Utility model patent CN215486852U discloses a vibration-damping and noise-reducing axial flow fan, including a body, a buffer assembly, and a vibration-damping assembly. The body includes a casing. The buffer assembly includes a slide rod mounted on the casing, a slider adapted to slide relative to the slide rod, a first spring fitted onto the slide rod and connected to the slider, a guard plate, a hinge seat fixed to the guard plate, and a connecting rod hinged between the slider and the hinge seat. The vibration-damping assembly is located at the bottom of the casing. The body also includes a fan body installed inside the casing. The fan body consists of a drive motor and fan blades. A noise-reducing cylinder is provided around the drive motor. The noise-reducing cylinder includes a sandwich layer and a filling material filled in the sandwich layer.

[0004] This invention enables the axial flow fan to buffer the collision between two adjacent fans during transportation, reducing the vibration generated between the fans, and to a certain extent reducing the vibration and noise during operation, thus improving the operating environment. However, this technology still presents significant maintenance inconveniences in practical applications. To achieve good vibration and noise reduction, these fans are typically designed with a compact structure, often employing an integrated enclosure. When it is necessary to inspect, maintain, or replace core components such as the motor, impeller, and bearings inside the fan, operators often need to reach inside the fan enclosure. If the space inside the enclosure is small, it is difficult to provide sufficient operating space, making it difficult for maintenance personnel to easily access internal components, further reducing maintenance efficiency. The entire process is time-consuming and labor-intensive, increasing the workload of maintenance personnel. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned technical problems by providing a shock-absorbing and noise-reducing axial flow fan with an openable shroud for easy maintenance.

[0006] In view of this, the present invention provides a vibration-damping and noise-reducing axial flow fan, comprising: The bracket has an outer cover on its inner side; The impeller is located inside the outer casing; The protective net is installed inside the outer casing and is located in front of the impeller; The filter screen is located inside the rear side of the outer cover; Support plate, located inside the outer cover; The motor is mounted on the support plate, and the motor output shaft is connected to the impeller. The shock absorption mechanism, mounted on the support plate and working in conjunction with the motor, is used to reduce vibration and noise in the motor. The outer cover consists of two semicircular covers, forming a cylindrical outer cover. One of the semicircular covers is cut in half, and the other semicircular cover has a guide groove inside. The cut semicircular covers are rotatably connected within the guide groove.

[0007] In the above technical solution, a locking mechanism is provided between the two halves of the cut-off semicircular cover, and a handle is provided on the outside of the two halves of the cut-off semicircular cover for easy opening, with the handle surface covered with a protective rubber sleeve.

[0008] In any of the above technical solutions, the locking mechanism further includes: Ear plates are located at both ends of the outer side of the halved semicircular cover on one side; The pivot is rotatably positioned between the two ear plates; The screw is mounted on the rotating shaft; The locking frame is located on the halved semicircular cover on the other side; A groove is formed on the lock frame, through which the screw passes; The limit nut is threaded onto the screw rod and contacts the outer surface of the lock frame after being tightened.

[0009] In any of the above technical solutions, the shock absorption mechanism further includes: Waist holes are located on the left and right sides of the support plate; The frame is located outside the motor; Connecting plates are located on the left and right sides of the frame; Spring shock absorbers are installed between the waist holes on the support plate and the connecting plate.

[0010] In any of the above technical solutions, the bracket is further connected to the semi-circular cover with a guide groove. The bracket has fixing plates on both the left and right sides, and the semi-circular cover has mounting brackets on both the left and right ends. The fixing plates and mounting brackets have corresponding through holes, through which rivets are inserted. The rivets are threaded with fastening nuts at the outer ends of the fixing plates.

[0011] In any of the above technical solutions, a swivel caster is provided at the bottom of the bracket, and a brake valve is provided on the swivel caster.

[0012] The beneficial effects of this utility model are: 1. The outer cover adopts a rotatable semi-circular cover structure, which, together with the locking mechanism and handle, can be quickly opened to expose the internal components, greatly shortening the maintenance time.

[0013] 2. The shock absorption mechanism absorbs the vibration energy of the motor by using spring shock absorbers in conjunction with waist holes, reducing vibration transmission and resonance noise; the sound insulation design of the outer cover works in conjunction with the shock absorption structure to reduce noise from the source and the transmission path, improving the comfort of the operating environment. 3. The locking mechanism reliably locks the semi-circular cover using screws and limit nuts to prevent accidental opening during operation; the bracket and the outer cover are rigidly connected by rivets and fastening nuts to ensure the stability of the overall structure and resist vibration and external impact. 4. The casters at the bottom of the bracket support 360-degree flexible movement to adapt to different scenarios and position adjustments; the brake valve can quickly lock the wheels to ensure the stability of the fan during operation and avoid safety issues caused by accidental movement.

[0014] 5. The protective net and filter screen respectively block large particles and fine impurities, protecting internal components and optimizing the cleanliness of the exhaust air; the compact design of each structural component works together to perform functions such as ventilation, protection, shock absorption, and noise reduction, thereby improving the overall performance of the equipment. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional structural schematic diagram of this utility model; Figure 2 This is a three-dimensional structural diagram of the locking mechanism of this utility model; Figure 3 This is a diagram showing the outer cover of this utility model in its open state; Figure 4 This is a three-dimensional structural diagram of the shock absorption mechanism of this utility model; Figure 5 This is a schematic diagram of the second three-dimensional structure of this utility model; The attached diagram is labeled as follows: 1. Bracket; 2. Outer cover; 21. Semicircular cover; 22. Guide groove; 23. Handle; 24. Protective rubber sleeve; 3. Impeller; 4. Protective net; 5. Filter screen; 6. Support plate; 7. Motor; 8. Locking mechanism; 81. Ear plate; 82. Rotating shaft; 83. Screw; 84. Locking frame; 85. Groove; 86. Limit nut; 9. Shock absorption mechanism; 91. Waist hole; 92. Frame; 93. Connecting plate; 94. Spring shock absorber; 10. Fixing plate; 11. Mounting bracket; 12. Through hole; 13. Rivet; 14. Fastening nut; 15. Caster wheel; 16. Brake valve. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0017] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0018] Example 1: like Figures 1-5 As shown, this embodiment provides a vibration-damping and noise-reducing axial flow fan, including: The bracket 1 has an outer cover 2 on its inner side; Impeller 3 is located inside outer casing 2; Protective net 4 is installed inside the outer cover 2 and is located in front of the impeller 3; Filter screen 5 is located inside the rear side of the outer cover 2; Support plate 6 is located inside outer cover 2; Motor 7 is mounted on support plate 6, and the output shaft of motor 7 is connected to impeller 3; The shock absorption mechanism 9 is mounted on the support plate 6 and works in conjunction with the motor 7 to reduce vibration and noise in the motor 7. The outer cover 2 is composed of two semicircular covers 21 to form a cylindrical outer cover 2. One of the semicircular covers 21 is cut in half, and the other semicircular cover 21 has a guide groove 22 inside. The cut semicircular covers 21 are rotatably connected in the guide groove 22.

[0019] In this technical solution, by designing the outer casing 2 as two relatively rotatable semicircular casings 21 (one semicircular casing 21 is cut in half and rotatably connected to the other semicircular casing 21 with guide grooves 22), the problem of difficult maintenance of core components such as the internal motor 7 and impeller 3 caused by the overall encapsulation and compact structure of traditional axial flow fans is solved. The cut-in semicircular casings 21 can be opened to quickly expose the internal components, significantly shortening the maintenance preparation time and reducing the difficulty of maintenance operations. Relying on a special vibration damping mechanism 9 in conjunction with the motor 7, the vibration of the motor 7 and the resulting noise are suppressed at the source. At the same time, the outer casing 2, protective net 4, filter 5 and other structures help optimize airflow and block noise transmission, improving the quietness and stability of the fan during operation. It is suitable for scenarios with strict requirements for environmental noise and equipment vibration (such as ventilation in precision workshops and office spaces). The protective net 4 is positioned in front to block large particles of debris from contacting the impeller 3, preventing damage to the impeller 3. The filter 5 is positioned behind to intercept fine impurities in the airflow, protecting the motor 7, optimizing the cleanliness of the outlet air, extending the service life of the internal components of the fan, and reducing malfunctions caused by the accumulation of impurities. The protective net 4 and the filter 5 are connected to the semi-circular cover 21 with guide grooves 22 to ensure that the protective and filtering structures are not disturbed when the outer cover 2 is opened and closed (the semi-circular cover 21, which is cut in half, rotates), maintaining the overall functional integrity of the fan and achieving a synergy of "convenient opening and closing for maintenance + stable normal functions".

[0020] Working principle: When the motor 7 starts, the output shaft drives the impeller 3 to rotate, driving the airflow to enter from the rear end of the outer cover 2 (the side of the filter screen 5). The airflow first passes through the filter screen 5 to initially intercept large foreign objects, then is accelerated and guided by the impeller 3, and flows forward. Finally, after being filtered a second time by the protective net 4 to remove fine impurities, it is discharged from the front end of the outer cover 2, completing the basic process of ventilation and impurity filtration.

[0021] When the motor 7 is running, its own vibration is transmitted to the damping mechanism 9 through the support plate 6. The damping mechanism 9 utilizes its own elasticity and damping properties (such as elastic elements absorbing vibration energy and damping structures attenuating vibration transmission) to weaken the vibration amplitude of the motor 7, reduce the transmission of vibration to components such as the support plate 6 and the outer cover 2, thereby reducing the structural resonance noise caused by vibration, and suppressing the mechanical noise generated by the motor 7 itself due to vibration, thus achieving the dual effect of vibration reduction and noise reduction.

[0022] When it is necessary to inspect the internal motor 7 and impeller 3, operate the halved semicircular cover 21 to rotate it along the guide groove 22 of the semicircular cover 21 with guide groove 22. Since the protective net 4 and filter 5 are only connected to the semicircular cover 21 with guide groove 22, their positions are relatively fixed during rotation and will not obstruct the opening of the halved semicircular cover 21. After the semicircular cover 21 is opened, the motor 7, impeller 3, etc. inside the outer cover 2 are fully exposed, and maintenance personnel can directly inspect, repair or replace the faulty parts; after maintenance, rotate the halved semicircular cover 21 in the opposite direction to make it return to its closed position, re-forming the cylindrical outer cover 2, restoring the fan to normal operation.

[0023] Example 2: This embodiment provides a vibration-damping and noise-reducing axial flow fan, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0024] like Figure 1 , Figure 2 and Figure 5 As shown, in this embodiment, an optimized locking mechanism 8 is provided between the two halves of the cut-in semicircular cover 21, and a handle 23 is provided on the outside of the two halves of the cut-in semicircular cover 21 for easy opening. The surface of the handle 23 is covered with a protective rubber sleeve 24.

[0025] In this technical solution, the locking mechanism 8 locks the halved semicircular cover 21 when closed, preventing accidental loosening or opening of the semicircular cover 21 during fan operation (such as high-speed rotation of the impeller 3 or equipment vibration), which could expose the high-speed rotating impeller 3 and the energized motor 7, leading to safety accidents such as personal injury or equipment damage, thus improving the safety of the fan operation. A handle 23 with a protective rubber sleeve 24 is provided on the outside of the halved semicircular cover 21. On one hand, the handle 23 provides a leverage point for the operator, facilitating the opening of the semicircular cover 21 for maintenance and reducing the difficulty of manual opening. On the other hand, the protective rubber sleeve 24 increases grip friction, preventing slippage during operation, and also acts as a buffer, anti-slip, and insulation (in case of static electricity), improving operational comfort and safety, making the opening and closing of the semicircular cover 21 easier and more stable.

[0026] Working principle: When the halved semicircular cover 21 rotates to the closed state (forming a cylindrical outer cover 2 with the semicircular cover 21 with guide groove 22), the locking mechanism 8 fixes the two halved semicircular covers 21 relatively, restricting their rotation under conditions such as fan vibration or slight external impact, ensuring that the outer cover 2 remains closed and guaranteeing operational safety. When maintenance is required, the operator unlocks the cover using a specific unlocking action, allowing the semicircular cover 21 to rotate and open along the guide groove 22. When opening the semicircular cover 21, the operator holds the handle 23 covered with a protective rubber sleeve 24. The rubber sleeve increases the friction between the hand and the handle 23, facilitating stable force application and causing the halved semicircular cover 21 to rotate around the guide groove 22, thus opening the outer cover 2. When closing the semicircular cover 21, force is applied using the handle 23 to return the semicircular cover 21 to its original position and trigger the locking mechanism 8. The elastic material of the protective rubber sleeve 24 can also cushion hand pressure during operation, avoiding hand discomfort caused by prolonged gripping or uneven force. At the same time, in static electricity environments, it can block static electricity conduction to a certain extent, improving the operating experience and safety.

[0027] like Figure 2 and Figure 5 As shown, in this embodiment, the optimized locking mechanism 8 includes: Ear plates 81 are located at both ends of the outer side of the halved semicircular cover 21 on one side; The rotating shaft 82 is rotatably positioned between the two ear plates 81; Screw 83 is mounted on shaft 82; Locking frame 84 is mounted on the halved semicircular cover 21 on the other side; A groove 85 is formed on the lock frame 84, and a screw 83 passes through the groove 85; The limit nut 86 is threaded onto the screw 83. After the limit nut 86 is locked, it contacts the outer surface of the lock frame 84.

[0028] In this technical solution, a mechanical locking structure is formed through the coordinated operation of the ear plate 81, rotating shaft 82, screw 83, locking frame 84, groove 85, and limiting nut 86, providing a stable, adjustable, and reliable locking method for the halved semicircular cover 21. Compared to simple snap-fit ​​mechanisms, this structure can continuously lock through thread preload, effectively preventing the semicircular cover 21 from accidentally opening due to vibration during fan operation, ensuring equipment safety and a closed environment for internal components, and meeting the structural stability and safety requirements of vibration-damping and noise-reducing axial flow fans. Operationally, the screw 83 is rotated using the rotating shaft 82, passing through the groove 85 of the locking frame 84, and then locked by the limiting nut 86. The steps are clear and the actions are simple, allowing workers to quickly lock and unlock the semicircular cover 21, making it suitable for scenarios where the semicircular cover 21 is frequently opened and closed during maintenance. Meanwhile, the structure can fine-tune the locking force by adjusting the tightness of the limit nut 86 according to the actual installation accuracy and the closed state of the semi-circular cover 21, adapting to fan covers 2 of different sizes and assembly tolerances, thus improving the product's versatility and practicality. Each component is installed on the outside of the semi-circular cover 21, without occupying the internal ventilation and vibration damping / noise reduction structural space of the cover 2. It can be well integrated with existing structures such as the cover 2 and vibration damping mechanism 9, achieving the locking function while maintaining the overall compact layout of the fan, ensuring that the original functions such as vibration damping, noise reduction, and airflow circulation are not interfered with.

[0029] Working principle: When locking the halved semicircular cover 21, first manually rotate the semicircular cover 21 to close it with another semicircular cover 21 with a guide groove 22 to form a complete cylindrical outer cover 2. Then, the operator rotates the shaft 82 installed between the ear plates 81, driving the screw 83 to rotate, so that the end of the screw 83 aligns with and passes through the groove 85 on the locking frame 84. Then, the limit nut 86 is screwed into the screw 83 and tightened towards the locking frame 84 until the limit nut 86 is tightly fitted with the outer surface of the locking frame 84. Using the preload of the threaded pair, the axial clamping force of the limit nut 86 on the locking frame 84 restricts the relative rotation of the two semicircular covers 21, thus achieving locking. For maintenance, unlocking is required. The operation is reversed. First, loosen the limit nut 86 to separate it from the surface of the locking frame 84, thus removing the clamping constraint on the locking frame 84. Next, rotate the shaft 82 to drive the screw 83 out of the groove 85 of the lock frame 84, releasing the connection constraint of the screw 83 on the two semicircular covers 21. At this time, the half-cut semicircular covers 21 can be manually rotated to open around the guide groove 22, exposing the internal components such as the motor 7 and impeller 3 for maintenance.

[0030] Example 3: This embodiment provides a vibration-damping and noise-reducing axial flow fan, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0031] like Figure 4 As shown, in this embodiment, the optimized shock absorption mechanism 9 includes: Waist holes 91 are opened on the left and right sides of the support plate 6; Frame 92 is located outside motor 7; Connecting plates 93 are located on the left and right sides of the frame 92; A spring shock absorber 94 is disposed between the waist hole 91 and the connecting plate 93 on the support plate 6.

[0032] In this technical solution, when the fan is running, the motor 7 vibrates due to its own rotation and airflow impact. The waist hole 91 allows the connecting plate 93 (including the frame 92 and the motor 7) to move slightly within a certain range. Combined with the elastic deformation of the spring damper 94, this better adapts to the vibration trajectory of the motor 7, avoiding stress concentration caused by overly rigid installation, and improving the damping mechanism 9's ability to buffer and adapt to vibrations of the motor 7 in different directions and amplitudes. Utilizing the elastic element characteristics of the spring damper 94, the rigid connection between the motor 7 and the support plate 6 is transformed into an elastic connection. When the motor 7 vibrates, the spring damper 94 absorbs and attenuates the vibration energy, reducing the transmission of vibration to the support plate 6 and the outer casing 2, thereby reducing structural resonance noise caused by vibration. Simultaneously, it weakens the outward propagation of noise generated by the motor 7's own vibration, achieving vibration reduction and noise reduction from both the vibration source and propagation path aspects, thus optimizing the acoustic environment of the fan operation.

[0033] Working principle: The motor 7 generates vibration during operation, which is transmitted to the connecting plate 93 through the frame 92. Since the connecting plate 93 is connected to the waist hole 91 on the support plate 6 through the spring damper 94, the spring damper 94 acts as an elastic medium. When the motor 7 drives the frame 92 and the connecting plate 93 to vibrate, the spring of the spring damper 94 is compressed or stretched, converting the vibration energy into the elastic potential energy of the spring. Utilizing the spring's rebound and damping characteristics, the vibration amplitude is quickly attenuated. At the same time, the waist hole 91 provides the connecting plate 93 with displacement freedom in the horizontal direction (or within a certain angle range), allowing the connecting plate 93 to move slightly with the vibration of the motor 7, avoiding the vibration being amplified by rigid constraints, and further optimizing the damping effect.

[0034] like Figure 1 , Figure 3 and Figure 5 As shown, in this embodiment, the optimized bracket 1 is connected to the semi-circular cover 21 with guide groove 22. The bracket 1 is provided with fixing plates 10 on both the left and right sides, and the semi-circular cover 21 is provided with mounting brackets 11 at both the left and right ends on the outer side. The fixing plates 10 and the mounting brackets 11 are provided with corresponding through holes 12, and rivets 13 are passed through the through holes 12. The rivets 13 are provided with fastening nuts 14 at the outer end of the fixing plates 10.

[0035] In this technical solution, the bracket 1 and the semi-circular cover 21 with guide groove 22 are rigidly connected through the cooperation of the fixing plate 10, mounting bracket 11, rivets 13, and fastening nuts 14. This connection stably transfers the weight of the fan body to the bracket 1, ensuring that the outer cover 2 and the bracket 1 do not shift relative to each other during operation, movement, or vibration of the fan. This avoids structural shaking, increased noise, or component damage caused by loose connections, providing a structural foundation for the stable operation of the entire fan. The connection method using rivets 13 and fastening nuts 14 ensures connection strength while facilitating installation and disassembly. When it is necessary to inspect or replace the outer cover 2 or the bracket 1, simply unscrew the fastening nuts 14 and remove the rivets 13 to separate the bracket 1 from the semi-circular cover 21. The operation is simple and convenient, reducing maintenance and time costs, and is especially suitable for axial flow fans that require regular maintenance. The through holes 12 on the fixing plate 10 and the mounting bracket 11 are designed to enable standardized connections, allowing the connection position between the bracket 1 and the semi-circular cover 21 to be finely adjusted according to actual needs (such as adjusting the corresponding position of the through holes 12 within the allowable range), adapting to different sizes or models of fan covers 2 and brackets 1, improving the versatility of components, and facilitating mass production and assembly.

[0036] Working Principle: During installation, the fixing plates 10 on both sides of the bracket 1 are aligned with the mounting bracket 11 on the outer side of the semi-circular cover 21 with guide grooves 22, ensuring that the through holes 12 of both correspond one-to-one. Then, rivets 13 are passed through the aligned through holes 12. One end of the rivet 13 passes through the fixing plate 10 and the mounting bracket 11, and a fastening nut 14 is screwed onto the outer end of the fixing plate 10 via a threaded connection. By tightening the fastening nut 14, the fixing plate 10 and the mounting bracket 11 are tightly fitted together. The axial tension of the rivet 13 and the preload of the fastening nut 14 securely connect the bracket 1 and the semi-circular cover 21 together, forming a unified structure, thus achieving effective force transmission and stable structural fixation. When it is necessary to separate the bracket 1 and the semi-circular cover 21, simply reverse the tightening of the fastening nut 14 to separate it from the fixing plate 10, and then pull the rivet 13 out of the through hole 12 to release the connection. This detachable connection method facilitates the individual inspection and replacement of the bracket 1 or the semi-circular cover 21 during wind turbine maintenance. Furthermore, if the connection position needs to be changed due to installation errors or structural adjustments, the connection can be re-secured by adjusting the correspondence between the fixing plate 10 and the through hole 12 on the mounting bracket 11 (within the allowable range of the through hole 12), enhancing the flexibility and adaptability of the structure.

[0037] like Figure 1 and Figure 5 As shown, in this embodiment, the optimized bracket 1 is provided with a universal wheel 15 at the bottom, and a brake valve 16 is provided on the universal wheel 15.

[0038] In this technical solution, the caster wheel 15 is connected to the bottom of the support frame 1 via a wheel frame, and its wheel body can rotate 360 ​​degrees around the vertical axis of the wheel frame. When the fan needs to be moved, the operator only needs to push the support frame 1, and the caster wheel 15 rolls on the ground. At the same time, the wheel body can automatically adjust the rotation angle according to the direction of the thrust, allowing the fan to move flexibly in any direction. This design reduces the friction between the fan and the ground when moving, making the handling process more labor-saving and convenient. After the fan is moved to the target position, the operator steps on the brake valve 16 on the caster wheel 15. The braking structure inside the brake valve 16 (usually a brake pad or brake block) will make close contact with the wheel body of the caster wheel 15, preventing the wheel body from rotating through friction, thereby locking the caster wheel 15. At this time, the fan can no longer be moved at will and can be stably placed in the designated position for operation. When the fan needs to be moved again, simply lift the brake valve 16 to release the constraint of the braking structure on the wheel body, and the caster wheel 15 can resume its rotation function, allowing the fan to be pushed and moved again. This flexible mobility allows the axial flow fan to adapt to different usage environments. For example, in large venues, laboratories, cleanrooms, and other places, the fan's placement can be quickly adjusted according to actual needs to meet the ventilation, cooling, or air exchange requirements of different areas, thus enhancing the equipment's applicability and practicality.

[0039] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A vibration-damping and noise-reducing axial flow fan, characterized in that, include: The bracket (1) has an outer cover (2) on its inner side; Impeller (3) is disposed inside the outer cover (2); A protective net (4) is installed inside the outer cover (2), and the protective net (4) is located in front of the impeller (3); The filter screen (5) is located inside the rear side of the outer cover (2); A support plate (6) is disposed inside the outer cover (2); The motor (7) is mounted on the support plate (6), and the output shaft of the motor (7) is connected to the impeller (3); The shock absorption mechanism (9) is installed on the support plate (6) and works in conjunction with the motor (7) to reduce vibration and noise in the motor (7); The outer cover (2) is composed of two semicircular covers (21) to form a cylindrical outer cover (2). One of the semicircular covers (21) is cut in half, and the other semicircular cover (21) has a guide groove (22) inside. The cut semicircular cover (21) is rotatably connected in the guide groove (22).

2. The vibration-damping and noise-reducing axial flow fan according to claim 1, characterized in that, A locking mechanism (8) is provided between the two halves of the semicircular cover (21), and a handle (23) is provided on the outside of the two halves of the semicircular cover (21) for easy opening. The surface of the handle (23) is covered with a protective rubber sleeve (24).

3. The vibration-damping and noise-reducing axial flow fan according to claim 2, characterized in that, The locking mechanism (8) includes: Ear plates (81) are provided at both ends of the outer side of the halved semicircular cover (21) on one side; A rotating shaft (82) is rotatably disposed between the two ear plates (81); A screw (83) is mounted on the rotating shaft (82); A locking frame (84) is disposed on the halved semicircular cover (21) on the other side; A groove (85) is formed on the lock frame (84), and the screw (83) passes through the groove (85). The limiting nut (86) is threaded onto the screw (83), and after the limiting nut (86) is locked, it contacts the outer surface of the lock frame (84).

4. The vibration-damping and noise-reducing axial flow fan according to claim 1, characterized in that, The shock absorption mechanism (9) includes: Waist holes (91) are provided on the left and right sides of the support plate (6); A frame (92) is disposed outside the motor (7); Connecting plates (93) are disposed on the left and right sides of the frame (92); A spring damper (94) is disposed between the waist hole (91) and the connecting plate (93) on the support plate (6).

5. The vibration-damping and noise-reducing axial flow fan according to claim 1, characterized in that, The bracket (1) is connected to the semicircular cover (21) with guide groove (22). The bracket (1) is provided with fixing plates (10) on both the left and right sides. The semicircular cover (21) is provided with mounting brackets (11) on both the left and right sides. The fixing plates (10) and mounting brackets (11) are provided with corresponding through holes (12). The through holes (12) are provided with rivets (13). The rivets (13) are provided with fastening nuts (14) at the outer end of the fixing plates (10).

6. The vibration-damping and noise-reducing axial flow fan according to claim 1, characterized in that, The bracket (1) is provided with casters (15) at the bottom, and a brake valve (16) is provided on the casters (15).

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