Fan damping device and fan

Abstract

The invention belongs to the technical field of fan vibration reduction, and particularly relates to a fan vibration reduction device and a fan. Comprising a driving wheel and a driven wheel, a clamping plate is installed on one side of the driven wheel in a sleeving mode, a through hole is fixedly formed in one side of the driven wheel, transmission pieces are evenly installed between the through hole and the inner wall of the driven wheel, a containing cavity is formed between the inner wall of the driven wheel and the transmission pieces, and spring rubber columns are installed on the inner wall of the containing cavity; adjusting springs sleeve the outer walls of the spring rubber columns, adjusting plates abut against the two ends of the adjusting springs, and adjusting assemblies are arranged at the ends, away from the driving wheel, of the adjusting plates. By arranging the spring rubber column and the adjusting assembly, when different types of fans are adapted, the spring rubber column can be extruded, so that the rigidity, the elastic force and other performance parameters of the device are changed, the resonance frequency points of the motor, the impeller and the volute are adjusted, resonance is avoided, and the vibration reduction protection effect on the fans is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fan vibration reduction, and particularly relates to a fan vibration reduction device and a fan. BACKGROUND

[0002] In industrial production, vibration problems exist in high-power and medium-power centrifugal fans and cross-flow fans, and the vibration amplitude is significantly higher than that of small-power models. In-depth analysis of the vibration source shows that the severe vibration of the motor is one of the core causes: the vibration energy generated during motor operation is transmitted to other components of the fan through multiple paths. First, it is directly conducted through the motor shaft, and at the same time, it is diffused to the surrounding through the motor housing and its support bracket, and finally it acts on the key components such as the impeller, causing obvious vibration of the impeller. This vibration transmission is easy to cause resonance. Since the natural frequencies of the impeller, the motor and the volute are coupled, when the vibration frequency transmitted by the motor is close to or even coincides with the natural frequency of the impeller or the volute, resonance will occur among the three. Resonance not only sharply amplifies the vibration amplitude, but also causes continuous damage to the fan structure, such as aggravating the friction between the impeller and the volute, causing the loosening of the connecting components, and even causing the deformation of the impeller and other serious faults. At the same time, the operating noise generated by resonance is also greatly increased, which not only deteriorates the working environment, but also indirectly reflects the attenuation of the performance of the fan, such as unstable air volume, increased energy consumption, etc., which seriously affects the overall operation efficiency and service life of the equipment.

[0003] To solve this problem, an existing fan vibration reduction device is disclosed in a Chinese patent (publication number CN105201923 B), which proposes a fan vibration damper and a fan. The driven wheel is connected with the impeller of the fan, so that the driving driving wheel rotates, the first transmission member rotates with the driving wheel, the first transmission member drives the damping member to rotate in the circumferential direction, the damping member drives the second transmission member to rotate, i.e. the second transmission member rotates with the first transmission member. Since the second transmission member is fixed to the driven wheel, the driven wheel is driven to rotate, i.e. the driving wheel drives the driven wheel to rotate through the damping member, and the damping is realized during the transmission of torque from the motor to the impeller, thereby reducing the vibration of the fan and further reducing the operating noise of the fan and improving the performance of the fan.

[0004] The damping member uses a rubber column with an embedded spring, so that the spring and the rubber column form an integral structure. When a force is applied, the external force first acts on the rubber column, the rubber deforms at the same time, and the internal spring is extruded. The spring and the rubber are synchronously stressed, and the two bear the load and deform together. This design can make the rubber absorb high-frequency vibration and dissipate energy through internal friction, and the spring can buffer low-frequency large-amplitude impact. It is suitable for the case of simultaneously suppressing multi-frequency vibration, but when the fan damper is adapted to different types of fans, due to the differences in the characteristics of the motors, impellers and other components of different fans, the performance parameters of the damping member also need to be adjusted to adapt to ensure the damping effect and fan performance. At this time, the worker needs to remove the vibration member and install the appropriate vibration member. Since the vibration member needs to be tightly installed in the damper to ensure the damping effect, the reserved space for installation is small, so the worker needs to bend the damping member and insert it between the driving wheel and the driven wheel, which is difficult to install and easy to damage the vibration member.

[0005] Therefore, a fan damping device and a fan are provided to solve the above problems. SUMMARY

[0006] In order to make up for the shortcomings of the prior art, solve the problem that when the fan damper is adapted to different types of fans, due to the differences in the characteristics of the motors, impellers and other components of different fans, the performance parameters of the damping member also need to be adjusted to adapt to ensure the damping effect and fan performance. At this time, the worker needs to remove the vibration member and install the appropriate vibration member. Since the vibration member needs to be tightly installed in the damper to ensure the damping effect, the reserved space for installation is small, so the worker needs to bend the damping member and insert it between the driving wheel and the driven wheel, which is difficult to install and easy to damage the vibration member. A fan damping device and a fan are provided.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the fan damping device and the fan, comprising a driving wheel and a driven wheel, a clamping plate is installed on one side of the driven wheel, a through hole is fixedly installed on one side of the driven wheel, a transmission member is uniformly installed between the through hole and the inner wall of the driven wheel, a placing cavity is formed between the inner wall of the driven wheel and the transmission member, a spring rubber column is installed on the inner wall of the placing cavity, an adjusting spring is sleeved on the outer wall of the spring rubber column, an adjusting plate is abutted on both ends of the adjusting spring, and an adjusting assembly is arranged on the end of the adjusting plate away from the driving wheel; The adjusting assembly comprises a connecting column arranged on one end of the adjusting plate, a first rotating plate is fixedly installed on the outer wall of the connecting column, a first rotating ring is fixedly installed on the end of the first rotating plate away from the connecting column, an adjusting wheel is fixedly installed on the bottom end of the first rotating ring, one end of the adjusting wheel penetrates through the driven wheel and extends to one side of the driven wheel, and a hole groove with the same diameter as the inner side of the through hole is formed in the inner side of the first rotating ring and the adjusting wheel.

[0008] Preferably, the pair of adjusting springs on both sides of the transmission component are configured as a group, one end of one adjusting spring is fixedly mounted with a first rotating plate, and one end of the other adjusting spring is fixedly mounted with a second rotating plate. The end of the second rotating plate away from the connecting column passes through the first rotating ring and extends to the inner side of the first rotating ring. The end of the second rotating plate extending to the inner side of the first rotating ring is fixedly mounted with a second rotating ring. The first rotating ring is sleeved on the outer wall of the second rotating ring. The second rotating ring and the first rotating ring are connected by a bearing. The second rotating ring is rotatably mounted on one side of the driven wheel.

[0009] Preferably, a first adjusting tooth block is fixedly installed on the outer wall of the first rotating ring, a first adjusting gear is meshed on one side of the first adjusting tooth block, a second adjusting gear is fixedly installed on the top of the first adjusting gear, the first adjusting gear and the second adjusting gear are both rotatably installed on the driven wheel at the end away from the driving wheel, a second adjusting tooth block is meshed on one side of the second adjusting gear, and the second adjusting tooth block is fixedly installed on one side of the second rotating ring.

[0010] Preferably, the ratio of the tooth density of the first adjusting tooth block to the tooth density of the outer wall of the first adjusting gear is equal to the ratio of the tooth density of the second adjusting tooth block to the tooth density of the outer wall of the second adjusting gear.

[0011] Preferably, the outer wall of each adjustment plate is slidably fitted with a sliding cavity, and the sliding cavity slides on the inner wall of the placement cavity.

[0012] Preferably, both sides of the transmission component are slidably mounted with abutment plates, and the top of each abutment plate is fixedly mounted with a handle.

[0013] Preferably, sliding grooves are provided on both sides of the abutment plate and between the transmission component, and positioning blocks are provided on the inner walls of the sliding grooves. The positioning blocks are fixedly installed on one side of the transmission component, and abutting soft blocks are provided on one side of the positioning blocks. The positioning blocks are fixedly installed at the end of the transmission component near the drive wheel. Two abutting soft blocks are provided and fixedly installed at both ends of the abutment plate respectively.

[0014] Preferably, one side of the positioning block and the abutting soft block are both set as straight portions, and the other end is set as inclined portions, with the positions of the straight portions and inclined portions of the positioning block and the abutting soft block being set in opposite directions.

[0015] A fan includes a shroud, a motor, and a fan vibration damping device, characterized in that a fan blade is rotatably mounted on the inner wall of the shroud, one end of the fan blade is driven and connected to a driving wheel, and the input end of the motor is driven and connected to a driven wheel.

[0016] The beneficial effects of this invention are: This invention provides a fan vibration damping device and a fan. By setting a spring rubber column and an adjustment component, when adapting to different types of fans, the spring rubber column can be squeezed to change the stiffness, elasticity and other performance parameters of the device, adjust the resonance frequency point of the motor, fan blades and volute, avoid resonance, and improve the vibration damping protection effect of the fan. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the fan of the present invention; Figure 2 This is a schematic diagram of the disassembled structure of the wind turbine from another perspective in this invention; Figure 3 This is the present invention. Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of the vibration damping device in this invention; Figure 5 This is a cross-sectional structural diagram of the driven wheel in this invention; Figure 6 This is a cross-sectional structural diagram of the adjustment component in this invention; Figure 7 In this invention Figure 6 Enlarged view of point B in the middle; Figure 8 In this invention Figure 6 A magnified view of point C in the middle.

[0018] Legend: 1. Driven wheel; 2. Driven wheel; 3. Clamping plate; 4. Through hole; 5. Transmission component; 6. Placement cavity; 7. Spring rubber column; 8. Adjusting spring; 9. Adjusting plate; 10. Connecting column; 11. First rotating plate; 12. First rotating ring; 13. Adjusting wheel; 14. Second rotating plate; 15. Second rotating ring; 16. First adjusting gear block; 17. First adjusting gear; 18. Second adjusting gear; 19. Second adjusting gear block; 20. Sliding cavity; 21. Abutment plate; 22. Handle; 23. Sliding groove; 24. Positioning block; 25. Abutment soft block; 26. Fan cover; 27. Motor; 28. Fan blade. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Specific implementation examples are given below.

[0021] Example 1: Please see Figures 1-8 This invention provides a fan vibration damping device and a fan, including a driving wheel 1 and a driven wheel 2. A clamping plate 3 is sleeved on one side of the driven wheel 2, and a through hole 4 is fixedly installed on one side of the driven wheel 2. A transmission component 5 is evenly installed between the through hole 4 and the inner wall of the driven wheel 2. A placement cavity 6 is formed between the inner wall of the driven wheel 2 and the transmission component 5. A spring rubber column 7 is installed on the inner wall of the placement cavity 6. The spring rubber column 7 is composed of rubber columns, and a buffer spring is embedded inside, so that the spring and the rubber column form an integral structure. When subjected to force, the external force acts on the rubber column first. The rubber deforms and squeezes the internal spring. The spring and the rubber are subjected to force synchronously, and the two work together to bear the load and deform. This design allows the rubber to absorb high-frequency vibration and dissipate energy through internal friction, while the spring buffers low-frequency large-amplitude impacts. It is suitable for situations where it is necessary to suppress multiple frequency band vibrations at the same time. Adjusting springs 8 are sleeved on the outer wall of the spring rubber column 7, so that the spring rubber column 7 and the adjusting springs 8 form a vibration damping component. This design, on the one hand, The adjustment spring 8 is used to adjust the stiffness of the damping component. On the other hand, it can cooperate with the spring rubber column 7 to make the spring rubber column 7 vibrate at high frequency and dissipate energy through internal friction. The adjustment spring 8 buffers large loads and low frequency vibrations. For example, when the fan starts, stops or the load changes, the torque will change suddenly. At this time, the adjustment spring 8 can better buffer the torque change, avoid large fluctuations in the impeller speed, further improve the damping effect of the damping component on the fan, and improve the service life of the fan. It should be noted that, compared with the existing technology, due to the addition of the adjustment spring 8, the stiffness, elasticity and damping performance parameters of the spring rubber column 7 are reduced. This avoids the problem that the deformation capacity of the damping component will decrease due to excessive stiffness and elasticity, making it difficult to effectively absorb the vibration energy transmitted by the motor 27 through elastic deformation, and also unable to buffer the torque impact. Both ends of the adjustment spring 8 are abutted by the adjustment plate 9, and the end of the adjustment plate 9 away from the drive wheel 1 is provided with the adjustment component. The adjustment assembly includes a connecting post 10 disposed at one end of the adjustment plate 9. A first rotating plate 11 is fixedly installed on the outer wall of the connecting post 10. A first rotating ring 12 is fixedly installed on the end of the first rotating plate 11 away from the connecting post 10. An adjustment wheel 13 is fixedly installed at the bottom end of the first rotating ring 12. The outer wall of the adjustment wheel 13 is evenly provided with grooves to increase the friction between the operator's hand and the adjustment wheel 13, making the adjustment operation more convenient. One end of the adjustment wheel 13 passes through the driven wheel 2 and extends to one side of the driven wheel 2. The inner sides of the first rotating ring 12 and the adjustment wheel 13 are provided with slots with the same diameter as the inner side of the through hole 4, so that the addition of the adjustment assembly will not interfere with the assembly of the fan. This design allows for adjustments to the vibration damping components when necessary.

[0022] Furthermore, a pair of adjusting springs 8 on both sides of the transmission component 5 are configured as a group. One end of one adjusting spring 8 is fixedly mounted with a first rotating plate 11, and one end of the other adjusting spring 8 is fixedly mounted with a second rotating plate 14. Sliding holes for sliding of the second rotating plate 14 are evenly opened on the outer side of the first rotating ring 12. The end of the second rotating plate 14 away from the connecting post 10 passes through the first rotating ring 12 and extends to the inner side of the first rotating ring 12. The end of the second rotating plate 14 extending to the inner side of the first rotating ring 12 is fixedly mounted with a second rotating ring 15. The first rotating ring 12 is sleeved on the outer wall of the second rotating ring 15. The second rotating ring 15 and the first rotating ring 12 are connected by a bearing. The second rotating ring 15 is rotatably mounted on one side of the driven wheel 2. A first adjusting gear block 16 is fixedly mounted on the outer wall of the first rotating ring 12. A first adjusting gear 17 is meshed on one side of the first adjusting gear block 16. A second adjusting gear 18 is fixedly installed at the top of 7. Both the first adjusting gear 17 and the second adjusting gear 18 are rotatably installed at the end of the driven wheel 2 away from the driving wheel 1. A second adjusting tooth block 19 meshes with one side of the second adjusting gear 18. The second adjusting tooth block 19 is fixedly installed on one side of the second rotating ring 15. This design allows the first rotating ring 12 to rotate when the adjusting wheel 13 drives the first rotating ring 12 to rotate. The first rotating ring 12 then drives the second rotating ring 15 to rotate through the first adjusting tooth block 16, the first adjusting gear 17, the second adjusting gear 18, and the second adjusting tooth block 19. This causes the second rotating plate 14 and another adjusting plate 9 to rotate, so that the adjusting plate 9 simultaneously compresses the adjusting spring 8 from both ends. Compared to compressing the adjusting spring 8 from only one end, applying pressure from both ends of the adjusting spring 8 simultaneously results in the adjusting spring 8 being subjected to force at both ends. The force will be more evenly distributed along the axial direction of the adjusting spring 8 to each spring coil. This makes the deformation of each part of the adjusting spring 8 relatively uniform, reduces local stress concentration, helps maintain the original structure and performance of the adjusting spring 8, extends the service life of the spring, and makes the performance of the damping component more stable.

[0023] Furthermore, the ratio of the tooth density of the first adjusting tooth block 16 to the tooth density of the outer wall of the first adjusting gear 17 is equal to the ratio of the tooth density of the second adjusting tooth block 19 to the tooth density of the outer wall of the second adjusting gear 18. This design ensures that the first rotating ring 12 and the second rotating ring 15 rotate at the same speed, thereby making the moving speed of each set of adjusting plates 9 the same. This further improves the uniformity of the force on the adjusting spring 8, effectively suppresses the lateral offset and swaying of the adjusting spring 8, and makes the adjusting spring 8 maintain a more stable state during compression. This helps to maintain the stability of the overall structure of the damping component and ensures the reliable operation of the damping system.

[0024] In this embodiment: By setting an adjustment component, different types of fans can be assembled on the drive wheel 1 and driven wheel 2. The stiffness and elasticity of the vibration damping components can be adjusted according to the actual operating conditions of the fans. This allows them to effectively absorb and buffer vibration energy when facing the vibration characteristics of different fans. When the stiffness and elasticity of the vibration damping components are matched with the fans, they can play a better role in the vibration transmission path, suppressing resonance, significantly reducing fan vibration and operating noise, improving the smoothness of fan operation, and avoiding the situation where the stiffness and elasticity of the vibration damping components are mismatched with the fans, which may cause the fan components to bear additional stress. For example, vibration damping components with too high stiffness cannot effectively buffer torque impact, which will cause the drive wheel 1, driven wheel 2, and transmission components to bear excessive force, accelerating wear and even leading to… This addresses the issue of component damage, improves the reliability and applicability of the vibration damping device, and furthermore, during fan assembly, the damping components can be given appropriate preload by adjusting the components, ensuring a tight fit between the damping components and the connecting surfaces of the drive wheel 1 and driven wheel 2. This reduces relative displacement during operation, improves the rigidity of the overall structure, and maintains sufficient friction to prevent loosening under vibration and impact conditions. Moreover, by setting the adjusting spring 8 and adjusting components, the replacement of the spring rubber column 7 can be reduced. Since the spring rubber column 7 requires the spring to be embedded into the rubber column through injection molding and other processes, the processing is complex, and the parameters of the spring and rubber (such as spring wire diameter and rubber formula) need to be matched in advance. It is difficult to replace the spring or rubber column separately later. Therefore, maintenance costs can be reduced and adjustment convenience can be improved.

[0025] Example 2: To further explain and illustrate based on Example 1, in this embodiment, as... Figure 5 , Figure 6 and Figure 8As shown, sliding cavities 20 are slidably installed on the outer walls of the adjusting plates 9. This design allows the adjusting plates 9 to be lifted out of the sliding cavities 20 during vibration damping component installation. At this time, the operator can pass one end of the spring rubber column 7 through the mounting hole on one side of the adjusting plate 9 and fit the adjusting spring 8 onto the outer wall of the spring rubber column 7. Then, the other end of the spring rubber column 7 is bent and passed through another adjusting plate 9. Compared to the existing vibration damping component installation method, removing the adjusting plates 9 from the sliding cavities 20 allows the operator to use a larger installation space, eliminating the need for assembly within the narrow placement cavity 6. This improves the installation efficiency of the vibration damping components and reduces damage to them. The sliding cavities 20 all slide against the inner wall of the placement cavity 6, and abutment plates 21 are slidably installed on both sides of the transmission component 5. A handle 22 is fixedly installed at the top of each abutment plate 21. By setting the abutment plate 21, the abutment plate 21 can be lifted from the transmission component 5 when installing the vibration damper, and the spring rubber column 7 abuts against one side of the abutment plate 21 after passing through the adjustment plate 9. This fixes the length of the spring rubber column 7 passing through the adjustment plate 9, allowing it to bend from the middle section when bending the spring rubber column 7, further reducing damage to the spring rubber column 7. Bending from the middle section of the spring rubber column 7 avoids uneven force, which can easily cause the spring rubber column 7 to generate a restoring torque in the straightening direction. This torque acts on the hand part, and the point of force application is relatively concentrated. The restoring torque can easily overcome the friction between the hand and the object, causing the object to bounce back and detach from the hand, thus hindering the assembly of the vibration damper.

[0026] Furthermore, in this embodiment, sliding grooves 23 are provided between both sides of the abutment plate 21 and the transmission member 5. Positioning blocks 24 are provided on the inner walls of the sliding grooves 23. The positioning blocks 24 are fixedly installed on one side of the transmission member 5, and one side of each positioning block 24 abuts against a soft abutment block 25. The positioning blocks 24 are fixedly installed at the end of the transmission member 5 near the drive wheel 1. Two soft abutment blocks 25 are provided and fixedly installed at both ends of the abutment plate 21, respectively. One side of both the positioning blocks 24 and the soft abutment blocks 25 is a straight portion, and the other side is an inclined portion. The positions of the straight and inclined portions of the positioning blocks 24 and the soft abutment blocks 25 are opposite. This design ensures that when approaching the driven wheel… When the abutting soft block 25 at one end moves to the side of the positioning block 24, the flat part of the abutting soft block 25 can abut against the flat part of the positioning block 24 under the action of gravity. Thus, the abutting plate 21 is kept in this position by the abutting soft block 25, which makes it convenient for the workers to assemble the vibration damping component by abutting the spring rubber column 7 against one side of the abutting plate 21. When the abutting soft block 25 at the end away from the driven wheel 2 moves to the side of the positioning block 24, the inclined part of the abutting soft block 25 matches the inclined part of the positioning block 24, so that the positioning block 24 provides a certain resistance to the abutting soft block 25, preventing the abutting plate 21 from sliding out of the transmission component 5 and increasing the extra load on the fan.

[0027] In this embodiment, the sliding fit design between the sliding cavity 20 and the adjusting plate 9 allows the operator to lift the adjusting plate 9 entirely from the sliding cavity 20 during installation. This expands the operating area that was originally limited by the narrow placement cavity 6. Compared with the situation in the prior art where assembly is difficult in a small space, the operator does not need to perform delicate operations in a confined space. It is easier to pass one end of the spring rubber column 7 through the mounting hole of the adjusting plate 9 and to conveniently attach the adjusting spring 8 to the outer wall of the spring rubber column 7, shortening the assembly time and improving the installation efficiency. At the same time, the setting of the abutment plate 21 ensures that the bending operation always starts from the middle section of the spring rubber column 7 by precisely positioning the length of the spring rubber column 7 passing through the adjusting plate 9. This middle section bending method allows the stress to be evenly distributed on the rubber column and the embedded spring, avoiding problems such as local tearing and spring deformation caused by stress concentration when bending at one end. This further protects the structural integrity of the damping component and ensures that its damping performance is not damaged after assembly.

[0028] A type of fan, such as Figure 1 and Figure 2 As shown, the device includes a shroud 26, a motor 27, and a fan vibration damping device. The device is characterized in that a fan blade 28 is rotatably mounted on the inner wall of the shroud 26, one end of the fan blade 28 is connected to the driving wheel 1, and the input end of the motor 27 is connected to the driven wheel 2. Since the motor 27 is a mature existing technology, its internal structure and working principle will not be described in detail.

[0029] The foregoing has shown and described 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 embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A fan vibration damping device, comprising a driving wheel (1) and a driven wheel (2), wherein a clamping plate (3) is sleeved on one side of the driven wheel (2), a through hole (4) is fixedly installed on one side of the driven wheel (2), a transmission component (5) is uniformly installed between the through hole (4) and the inner wall of the driven wheel (2), a placement cavity (6) is formed between the inner wall of the driven wheel (2) and the transmission component (5), and a spring rubber column (7) is installed on the inner wall of the placement cavity (6), characterized in that: The outer wall of each spring rubber column (7) is fitted with an adjusting spring (8), and both ends of the adjusting spring (8) are abutted against an adjusting plate (9). The end of the adjusting plate (9) away from the drive wheel (1) is provided with an adjusting component. The adjustment assembly includes a connecting post (10) disposed at one end of the adjustment plate (9). A first rotating plate (11) is fixedly installed on the outer wall of the connecting post (10). A first rotating ring (12) is fixedly installed at the end of the first rotating plate (11) away from the connecting post (10). An adjustment wheel (13) is fixedly installed at the bottom end of the first rotating ring (12). One end of the adjustment wheel (13) passes through the driven wheel (2) and extends to one side of the driven wheel (2). The inner sides of the first rotating ring (12) and the adjustment wheel (13) are both provided with a slot with the same diameter as the inner side of the through hole (4).

2. The fan vibration damping device according to claim 1, characterized in that: The pair of adjusting springs (8) on both sides of the transmission component (5) are set as a group. One end of one of the adjusting springs (8) is fixedly installed with a first rotating plate (11), and the other end of the adjusting spring (8) is fixedly installed with a second rotating plate (14). The end of the second rotating plate (14) away from the connecting column (10) passes through the first rotating ring (12) and extends to the inner side of the first rotating ring (12). The end of the second rotating plate (14) extending to the inner side of the first rotating ring (12) is fixedly installed with a second rotating ring (15). The first rotating ring (12) is sleeved on the outer wall of the second rotating ring (15). The second rotating ring (15) and the first rotating ring (12) are connected by a bearing. The second rotating ring (15) is rotatably installed on one side of the driven wheel (2).

3. The fan vibration damping device according to claim 1, characterized in that: A first adjusting tooth block (16) is fixedly installed on the outer wall of the first rotating ring (12). A first adjusting gear (17) is meshed on one side of the first adjusting tooth block (16). A second adjusting gear (18) is fixedly installed on the top of the first adjusting gear (17). Both the first adjusting gear (17) and the second adjusting gear (18) are rotatably installed on the end of the driven wheel (2) away from the driving wheel (1). A second adjusting tooth block (19) is meshed on one side of the second adjusting gear (18). The second adjusting tooth block (19) is fixedly installed on one side of the second rotating ring (15).

4. The fan vibration damping device according to claim 3, characterized in that: The ratio of the tooth density of the first adjusting tooth block (16) to the tooth density of the outer wall of the first adjusting gear (17) is equal to the ratio of the tooth density of the second adjusting tooth block (19) to the tooth density of the outer wall of the second adjusting gear (18).

5. A fan vibration damping device according to claim 1, characterized in that: The outer wall of each adjustment plate (9) is slidably fitted with a sliding cavity (20), and the sliding cavity (20) slides on the inner wall of the placement cavity (6).

6. The fan vibration damping device according to claim 1, characterized in that: Both sides of the transmission component (5) are slidably mounted with abutment plates (21), and the top of each abutment plate (21) is fixedly mounted with a handle (22).

7. A fan vibration damping device according to claim 6, characterized in that, The two sides of the abutment plate (21) are provided with sliding grooves (23) between them and the transmission component (5). The inner wall of the sliding groove (23) is provided with positioning blocks (24). The positioning blocks (24) are fixedly installed on one side of the transmission component (5). One side of the positioning block (24) abuts against a soft block (25). The positioning blocks (24) are fixedly installed at one end of the transmission component (5) near the drive wheel (1). There are two soft blocks (25) and they are fixedly installed at both ends of the abutment plate (21).

8. A fan vibration damping device according to claim 7, characterized in that, The positioning block (24) and the abutting soft block (25) are both set as straight parts on one side and as inclined parts on the other side. The positions of the straight parts and the inclined parts of the positioning block (24) and the abutting soft block (25) are set opposite.

9. A fan, comprising a fan shroud (26), a motor (27), and a fan vibration damping device as described in claims 1-8, characterized in that, The inner wall of the shroud (26) is rotatably mounted with a fan blade (28), one end of which is connected to the drive wheel (1) via transmission, and the input end of the motor (27) is connected to the driven wheel (2) via transmission.

Images