A vibration and noise damping assembly, structure and saw blade substrate

Abstract

The application discloses a kind of vibration-absorbing sound-absorbing assembly, structure and saw blade matrix, solve the vibration control effect of poor problem generated in the production and manufacturing process of prior art component, with the beneficial effect of effectively absorbing vibration and reducing noise, specific scheme is as follows: a kind of vibration-absorbing sound-absorbing assembly, including multiple groups of asymmetric star units, multiple groups of asymmetric star units are sequentially connected into a row or a column along the polar coordinate direction, or multiple groups of asymmetric star units are arranged in multiple rows and multiple columns along the polar coordinate direction, when multiple groups of asymmetric star units are arranged in multiple rows and multiple columns, every two adjacent asymmetric star units in each row are connected, and every two adjacent asymmetric star units in each column are connected;The width of vibration-absorbing sound-absorbing assembly along one side of the polar coordinate direction is greater than the width of the other side;Asymmetric star unit is provided with at least four corners outward in the first plane, and multiple corners are sequentially connected in the first plane, and part of the corners are arranged towards the first side of the asymmetric star unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vibration and noise reduction, and particularly relates to a vibration and noise reduction assembly, a structure and a saw blade base. BACKGROUND

[0002] The statements in this section merely provide background information related to the present application and do not necessarily constitute the prior art.

[0003] In the field of industrial production, processing and application, many components will generate noise and vibration during use, which not only affects the comfort of the working environment, but also may affect the use precision of the components. For example, a cutting tool circular saw blade is widely used in the construction, woodworking, metal processing and stone processing industries. The vibration generated by the circular saw blade during work affects its cutting precision. In the prior art, the vibration reduction mode of the circular saw blade is to set a vibration absorption groove to reduce vibration and noise through the hollow vibration absorption groove, and there is a problem of poor noise control effect. SUMMARY

[0004] In view of the deficiencies in the prior art, the present application aims to provide a vibration and noise reduction assembly which can effectively provide damping effect by using elasticity, thereby playing a role in reducing vibration and noise.

[0005] In order to achieve the above-mentioned purpose, the present application is realized by the following technical scheme:

[0006] A vibration and noise reduction assembly, comprising a plurality of asymmetric star-shaped units, the plurality of asymmetric star-shaped units are connected in a row or a column along the polar coordinate direction, or the plurality of asymmetric star-shaped units are arranged in multiple rows and multiple columns along the polar coordinate direction, and when the plurality of asymmetric star-shaped units are arranged in multiple rows and multiple columns, each row of two adjacent asymmetric star-shaped units is connected, and each column of two adjacent asymmetric star-shaped units is connected.

[0007] The width of the vibration and noise reduction assembly along one side of the polar coordinate direction is greater than the width along the other side.

[0008] The asymmetric star-shaped unit is hollow, and the asymmetric star-shaped unit is provided with at least four corners outwardly in a first plane, and the plurality of corners are connected in sequence in the first plane, wherein part of the corners are arranged towards a first side of the asymmetric star-shaped unit, and the other part of the corners are arranged towards a second side of the asymmetric star-shaped unit, the first side and the second side are oppositely arranged, and the distance between the two corners towards the second side of the asymmetric star-shaped unit is greater than the distance between the two corners towards the first side.

[0009] The damping and silencing assembly as described above comprises a plurality of asymmetric star-shaped units which can be arranged in rows or sequentially connected into a row, because the asymmetric star-shaped unit is hollow and provided with at least four corners, the directions of some of the corners are opposite to the directions of the other corners, so that the asymmetric star-shaped unit can rebound when compressed, the damping and silencing assembly composed of a plurality of asymmetric star-shaped units can effectively reduce noise and slow down vibration propagation during compression, achieving the purpose of damping and silencing; and the plurality of asymmetric star-shaped units can effectively improve the rigidity of the damping and silencing assembly and increase the overall complexity.

[0010] The damping and silencing assembly as described above, the asymmetric star-shaped unit is provided with four corners outwardly and four corners inwardly in the first plane, the outward corners and the inward corners are alternately arranged, the outward corners are sequentially the first corner, the second corner, the third corner and the fourth corner, the angles of the first corner and the second corner are the same, the angles of the third corner and the fourth corner are the same, and the angle of the third corner is smaller than the angle of the first corner.

[0011] The damping and silencing assembly as described above, the distance between the third corner and the fourth corner is greater than the distance between the first corner and the second corner.

[0012] The interval angle between the third corner and the fourth corner is greater than the interval angle between the first corner and the second corner, so that the third corner and the fourth corner protrude more outwardly relative to the first corner and the second corner, thereby satisfying that the points where the angles of the first corner and the fourth corner are located are in the same radial direction, and the points where the angles of the second corner and the third corner are located are in another radial direction.

[0013] The damping and silencing assembly as described above, the lengths of the two sides of the first corner are the same, the lengths of the two sides of the second corner are the same, and the angles of the first corner and the second corner can be 60°.

[0014] The length of the side of the third corner close to the fourth corner is greater than the length of the other side, and the length of the side of the fourth corner close to the third corner is greater than the length of the other side, so that the third corner protrudes in the direction away from the fourth corner, and the fourth corner protrudes in the direction away from the third corner.

[0015] The damping and silencing assembly as described above, the first link is arranged at the connection between the first corner and the second corner, the second link is arranged between the second corner and the third corner, the third link is arranged between the third corner and the fourth corner, and the fourth link is arranged between the fourth corner and the first corner, the free end of the first link is flush with the first corner and the second corner, and the free end of the third link exceeds the third corner and the fourth corner.

[0016] The first connecting rod and the third connecting rod are located on the same straight line, and the first connecting rod and the third connecting rod are located on the same radial direction in the polar coordinates, and the second connecting rod and the fourth connecting rod are located on the same arc.

[0017] In a second aspect, the application further provides a damping and noise reduction structure, comprising a plurality of fan-shaped frames, at least two groups of the damping and noise reduction assemblies are arranged in the fan-shaped frames along the radial direction of the fan-shaped frames, a mass block is connected between the adjacent two groups of the damping and noise reduction assemblies, the innermost damping and noise reduction assembly is connected with the first arc surface of the fan-shaped frame, and the outer side of the outermost damping and noise reduction assembly is connected with the second arc surface of the fan-shaped frame.

[0018] The damping and noise reduction structure as described above comprises a plurality of fan-shaped frames, the damping and noise reduction assemblies are arranged in each fan-shaped frame along the radial direction of the fan-shaped frame, a mass block is connected between the adjacent two damping and noise reduction assemblies, thus forming a resonance damper in the fan-shaped frame, and the fan-shaped frame, the damping and noise reduction assembly and the mass block are located in the same plane, so that the damping effect can be generated when the object to which the damping and noise reduction structure is applied vibrates, and the vibration can be effectively absorbed and the noise can be reduced.

[0019] The damping and noise reduction structure as described above, when a plurality of fan-shaped frames are arranged, a damping assembly is connected between the adjacent two fan-shaped frames, the damping assembly comprises a plurality of asymmetric star-shaped units, and the adjacent two asymmetric star-shaped units in the damping assembly are connected.

[0020] In order to avoid that the outermost fan-shaped frame is rigidly connected with the object to which the damping and noise reduction structure is applied, the outer side of the outermost fan-shaped frame is also provided with a damping assembly.

[0021] In a third aspect, the application further provides a damping and noise reduction structure, comprising a plurality of groups of the damping and noise reduction assemblies, and the plurality of groups of the damping and noise reduction assemblies form a three-dimensional damping and noise reduction structure.

[0022] The asymmetric star-shaped unit is further provided with four corners in a second plane, the first plane is perpendicular to or intersects with the second plane, and the second plane passes through the first connecting rod and the third connecting rod.

[0023] In a fourth aspect, the application further provides a saw blade base body, a plurality of vibration absorption grooves are arranged in the radial direction of the saw blade base body, the vibration absorption grooves are provided with the damping and noise reduction structure, the vibration absorption grooves are arranged at a distance from the mounting holes of the saw blade base body, and the vibration absorption grooves are arranged at a distance from the saw teeth of the saw blade base body.

[0024] The beneficial effects of the application are as follows:

[0025] 1) The present application provides a vibration and noise reduction assembly, which comprises a plurality of asymmetric star-shaped units arranged in rows or connected in sequence, because the asymmetric star-shaped units are hollow and provided with at least four corners, the directions of some of the corners are opposite to the directions of the other corners, so that the asymmetric star-shaped units can rebound when compressed, the vibration and noise reduction assembly formed by the plurality of asymmetric star-shaped units can effectively reduce noise and slow down vibration propagation during compression, achieving the purpose of vibration and noise reduction; and the plurality of asymmetric star-shaped units can effectively improve the rigidity of the vibration and noise reduction assembly and increase the overall complexity.

[0026] 2) In the present application, the asymmetric star-shaped unit structure is reasonably arranged, four corners are arranged outward, and the angles and positions of the four corners are reasonably arranged, so that the third corner protrudes in a direction away from the fourth corner, and the fourth corner protrudes in a direction away from the third corner, which is beneficial to deformation when absorbing vibration and rapid recovery after deformation.

[0027] 3) The vibration and noise reduction structure in the present application comprises a plurality of fan-shaped frames, a vibration and noise reduction assembly is arranged in each fan-shaped frame along the radial direction thereof, and a mass block is connected between adjacent two vibration and noise reduction assemblies, so that a resonant damper is formed in the fan-shaped frame, and the fan-shaped frame, the vibration and noise reduction assembly and the mass block are located in the same plane, which can produce damping effect when the object to which the vibration and noise reduction structure is applied vibrates, effectively absorbing vibration and reducing noise.

[0028] 4) In the present application, the asymmetric star-shaped unit can also be provided with another corner outward in the second plane, so that the asymmetric star-shaped unit forms a three-dimensional structure, so that when a plurality of asymmetric star-shaped units in the vibration and noise reduction assembly are arranged in multiple rows and multiple columns, a three-dimensional vibration and noise reduction structure is formed, and a vibration and noise reduction structure with a set height is formed by adjusting the height change.

[0029] 5) The vibration and noise reduction structure in the present application can be applied to a saw blade substrate, and the vibration and noise reduction structure is arranged in a vibration absorption groove, which can effectively block vibration propagation, reduce the vibration level generated by the circular saw blade during cutting, minimize noise pollution, improve the quietness and comfort of the working environment, reduce the influence of circular saw blade vibration on cutting materials, and improve cutting precision and processing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings accompanying the specification of the present application serve to provide a further understanding of the present application, and the illustrative embodiments of the present application and their descriptions serve to explain the present application, and do not constitute an improper limitation on the present application.

[0031] Figure 1 is a schematic view of an asymmetric star-shaped unit in a vibration and noise reduction assembly according to one or more embodiments of the present application.

[0032] Figure 2 is a schematic diagram of an asymmetric star unit in polar coordinates in a vibration and noise damping assembly according to one or more embodiments of the present application.

[0033] Figure 3 is a schematic diagram of a vibration and noise damping assembly connected with a mass in a vibration and noise damping structure according to one or more embodiments of the present application.

[0034] Figure 4 is a schematic diagram of a vibration and noise damping structure according to one or more embodiments of the present application.

[0035] Figure 5 is a schematic diagram of a one-dimensional spring-mass system formed in a vibration and noise damping structure according to one or more embodiments of the present application.

[0036] Figure 6 is a schematic diagram of a saw blade base according to one or more embodiments of the present application.

[0037] Figure 7 is a schematic diagram of an asymmetric star unit in a vibration and noise damping structure in Example Three of the present application.

[0038] Figure 8 is a schematic diagram of a three-dimensional vibration and noise damping structure in Example Three of the present application.

[0039] In the drawings: the distances or dimensions between the parts are exaggerated for showing the positions of the parts, and the schematic diagrams are merely illustrative.

[0040] wherein:

[0041] 1. first angle, 2. first link, 3. second angle, 4. second link, 5. third angle, 6. third link, 7. fourth angle, 8. fourth link, 9. vibration and noise damping assembly, 10. mass, 11. fan-shaped frame, 12. damping assembly, 13. saw blade base, 14. vibration absorption groove, 15. asymmetric star unit. DETAILED DESCRIPTION

[0042] It should be noted that the following detailed description is exemplary in nature and is intended to provide further description of the application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0043] 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 scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] As described in the background section, existing technologies suffer from poor vibration control during component manufacturing and use. To address these technical problems, this invention proposes a vibration reduction and noise reduction component.

[0045] Example 1

[0046] In a typical embodiment of the present invention, a vibration reduction and noise reduction component includes multiple sets of asymmetric star units 15. The multiple sets of asymmetric star units 15 are connected sequentially in a row or column along the polar coordinate direction, or the multiple sets of asymmetric star units 15 are arranged in multiple rows and columns along the polar coordinate direction. When the multiple sets of asymmetric star units 15 are arranged in multiple rows and columns, two adjacent asymmetric star units 15 in each row are connected, and two adjacent asymmetric star units 15 in each column are connected.

[0047] The width of the vibration damping and noise reduction component 9 on one side along the polar coordinate direction is greater than the width on the other side. That is, along the polar coordinate direction, the width of the vibration damping and noise reduction component 9 near the origin is less than the width on the other side.

[0048] The asymmetric star unit 15 is hollow and has at least four corners extending outward in a first plane. Multiple corners are connected sequentially in the first plane, with some corners facing the first side of the asymmetric star unit 15 and others facing the second side of the asymmetric star unit 15. The first and second sides are opposite to each other, and the distance between the two corners facing the second side of the asymmetric star unit 15 is greater than the distance between the two corners facing the first side.

[0049] In this embodiment, reference Figure 1 and Figure 2 As shown, the asymmetric star-shaped unit 15 has four corners arranged outwards and four corners arranged inwards in the first plane. The outward and inward corners are arranged alternately. The outward corners are, in order, the first corner 1, the second corner 3, the third corner 5 and the fourth corner 7. The first corner 1 and the second corner 3 have the same angle, the third corner 5 and the fourth corner 7 have the same angle, the angle of the third corner 5 is less than the angle of the first corner 1, and the distance between the third corner 5 and the fourth corner 7 is greater than the distance between the first corner 1 and the second corner 3.

[0050] It is easy to understand that the first angle 1 and the second angle 3 are closer to the origin of the polar coordinates, and the interval angle between the third angle 5 and the fourth angle 7 is greater than the interval angle between the first angle 1 and the second angle 3, so that the third angle 5 and the fourth angle 7 protrude more outward relative to the first angle 1 and the second angle 3, so as to satisfy that the points where the first angle 1 and the fourth angle 7 are located are in the same radial direction, and the points where the second angle 3 and the third angle 5 are located are in another radial direction.

[0051] The lengths of the two sides of the first angle 1 are the same, the lengths of the two sides of the second angle 3 are the same, and the angles of the first angle 1 and the second angle 3 can be 60°;

[0052] In this embodiment, the length of the side of the third angle 5 close to the second angle 3 is the same as the length of the side of the second angle 3, the length of the side of the third angle 5 close to the fourth angle 7 is greater than the length of the other side, the length of the side of the fourth angle 7 close to the first angle 1 is the same as the length of the side of the first angle 1, and the length of the side of the fourth angle 7 close to the third angle 5 is greater than the length of the other side, so that the third angle 5 protrudes in the direction away from the fourth angle 7, and the fourth angle 7 protrudes in the direction away from the third angle 5.

[0053] In addition, it should be noted that the first connecting rod 2 is arranged at the connection between the first angle 1 and the second angle 3 in the asymmetric star-shaped unit 15, the second connecting rod 4 is arranged between the second angle 3 and the third angle 5, the third connecting rod 6 is arranged between the third angle 5 and the fourth angle 7, and the fourth connecting rod 8 is arranged between the fourth angle 7 and the first angle 1, the free end of the first connecting rod 2 is flush with the first angle 1 and the second angle 3, and the free end of the third connecting rod 6 exceeds the third angle 5 and the fourth angle 7;

[0054] The first connecting rod 2 and the third connecting rod 6 are located on the same line, the first connecting rod 2 and the third connecting rod 6 are located in the same radial direction in the polar coordinates, and the second connecting rod 4 and the fourth connecting rod 8 are located on the same arc; so that the asymmetric star-shaped unit has a necked section in the middle of the polar coordinate direction, so that the other side of the first angle 1 away from the second angle 3 and the other side of the second angle 3 away from the first angle 1 are arranged in parallel.

[0055] Moreover, when the damping and silencing assembly 9 is connected, the third connecting rod 6 of the previous asymmetric star-shaped unit is connected with the first connecting rod 2 of the next asymmetric star-shaped unit, the second connecting rod 4 of one side of the asymmetric star-shaped unit is connected with the fourth connecting rod 8 of the other side of the asymmetric star-shaped unit, and each connecting rod is connected with the inward angle of the asymmetric star-shaped unit.

[0056] The vibration damping and noise reduction component 9 provided in this embodiment includes multiple sets of asymmetric star-shaped units 15. These multiple sets of asymmetric star-shaped units 15 can be arranged in rows or connected sequentially in a row. Because the asymmetric star-shaped units are hollow and have at least four corners, with some corners facing opposite directions to others, the asymmetric star-shaped units 15 can rebound when compressed. The vibration damping and noise reduction component 9 composed of multiple sets of asymmetric star-shaped units can effectively reduce noise and slow down vibration propagation during compression, thus achieving the purpose of vibration damping and noise reduction. Moreover, the multiple sets of asymmetric star-shaped units 15 can effectively improve the rigidity of the vibration damping and noise reduction component 9 and increase the overall compositeness.

[0057] Example 2

[0058] This embodiment provides a vibration reduction and noise reduction structure, referencing... Figure 4 As shown, the device includes several sector-shaped frames 11. At least two sets of vibration damping and noise reduction components 9, as described in Embodiment 1, are arranged within each sector-shaped frame 11 along its radial direction. In this embodiment, two sets of vibration damping and noise reduction components 9 are arranged within each sector-shaped frame 11. (Refer to...) Figure 3 As shown, a mass block 10 is connected between two adjacent sets of vibration damping and noise reduction components 9. The innermost vibration damping and noise reduction component 9 is connected to the first arc surface of the fan-shaped frame 11, and the outermost vibration damping and noise reduction component 9 is connected to the second arc surface of the fan-shaped frame 11.

[0059] The mass block 10 can also be fan-shaped, and the mass block 10 has a set mass.

[0060] It should be explained that when there are multiple locations for the sector-shaped frame 11, refer to... Figure 4 As shown, along the polar coordinate direction, the length and width of the sector-shaped frame 11 gradually increase; a damping assembly 12 connects adjacent sector-shaped frames 11, and the damping assembly 12 includes multiple sets of asymmetric star-shaped units 15. These multiple sets of asymmetric star-shaped units 15 are connected in a row, and adjacent asymmetric star-shaped units 15 are connected. The outermost sector-shaped frame 11 also has a damping assembly 12 on its outer surface. The number of two asymmetric star-shaped units 15 in the damping assembly 12 is greater than the number of asymmetric star-shaped units 15 in a single row in the vibration damping and noise reduction assembly 9. (Refer to...) Figure 5 As shown, this vibration damping and noise reduction structure forms a one-dimensional spring-mass system, in which, This represents the j-th segment of the vibration damping and noise reduction structure, where j is a natural number. M represents the stiffness of the vibration damping and noise reduction component 9. j This represents the mass of mass block 10 in the vibration damping and noise reduction structure; This indicates the damping of the vibration reduction and noise reduction component 9. The stiffness of the asymmetric star element 15 is represented by m. jThe mass of the asymmetric star unit 15 is shown.

[0061] The damping and noise reduction structure provided by the embodiment includes a plurality of fan-shaped frames 11. Each fan-shaped frame 11 is provided with a damping and noise reduction assembly 9 along the radial direction thereof. Adjacent two damping and noise reduction assemblies 9 are connected with a mass block 10. Thus, a resonance damper is formed in the fan-shaped frame 11. The fan-shaped frame 11, the damping and noise reduction assembly 9 and the mass block 10 are located in the same plane. When the object to which the damping and noise reduction structure is applied vibrates, the damping and noise reduction structure can generate damping effect, effectively absorbing vibration and reducing noise.

[0062] Embodiment three

[0063] The damping and noise reduction structure provided by the embodiment includes a plurality of fan-shaped frames 11. Each fan-shaped frame 11 is provided with a damping and noise reduction assembly 9 along the radial direction thereof. Adjacent two damping and noise reduction assemblies 9 are connected with a mass block 10. Thus, a resonance damper is formed in the fan-shaped frame 11. The fan-shaped frame 11, the damping and noise reduction assembly 9 and the mass block 10 are located in the same plane. When the object to which the damping and noise reduction structure is applied vibrates, the damping and noise reduction structure can generate damping effect, effectively absorbing vibration and reducing noise.

[0064] Reference Figure 7 As shown in the figure, the asymmetric star unit 15 is also provided with four corners in the second plane. The first plane is perpendicular to or intersects with the second plane. The second plane passes through the first connecting rod 2 and the third connecting rod 6. Thus, the asymmetric star unit 15 is provided with eight corners outwardly. The eight corners are located in two planes, so that the asymmetric star unit 15 forms a three-dimensional structure. When a plurality of asymmetric star units 15 in the damping and noise reduction assembly 9 are arranged in multiple rows and multiple columns, a three-dimensional damping and noise reduction structure is formed. As shown in the figure, when a plurality of layers of the damping and noise reduction assembly 9 are arranged along the height direction of the damping and noise reduction assembly 9, a damping and noise reduction structure with a set height is formed. Figure 8

[0065] Thus, it can be understood that the three-dimensional damping and noise reduction structure can be applied to a space in a three-dimensional space that needs damping and noise reduction.

[0066] Embodiment four

[0067] The saw blade base provided by the embodiment includes a plurality of fan-shaped frames 11. Each fan-shaped frame 11 is provided with a damping and noise reduction assembly 9 along the radial direction thereof. Adjacent two damping and noise reduction assemblies 9 are connected with a mass block 10. Thus, a resonance damper is formed in the fan-shaped frame 11. The fan-shaped frame 11, the damping and noise reduction assembly 9 and the mass block 10 are located in the same plane. When the object to which the damping and noise reduction structure is applied vibrates, the damping and noise reduction structure can generate damping effect, effectively absorbing vibration and reducing noise. Figure 6 As shown in the figure, the saw blade base 13 can be an integral whole, or the saw blade base 13 is assembled by two or more saw blade bodies. The saw blade base 13 is provided with a plurality of vibration absorption grooves 14 along the radial direction thereof. The vibration absorption grooves 14 pass through or do not pass through the saw blade base 13. Alternatively, the depth of the vibration absorption groove 14 is less than the thickness of the saw blade base 13, or even the depth of the vibration absorption groove 14 is less than the thickness of a single piece of the saw blade base 13. Each vibration absorption groove 14 is fan-shaped. Adjacent two vibration absorption grooves 14 are arranged at a set angle. The vibration absorption groove 14 is provided with the damping and noise reduction structure described in embodiment two. The vibration absorption groove 14 is arranged at a distance from the saw blade base mounting hole. The vibration absorption groove 14 is arranged at a distance from the saw blade 13.

[0068] ​Specifically, the vibration absorption groove 14 is arranged on the surface of the saw blade base 13, and a plurality of fan-shaped frames 11 can be directly machined on the surface of the saw blade base 13 by a photoetching machine. The damping and silencing assembly 9 can be printed by an existing 3D printer. After the printing is completed, the damping and silencing assembly 9 is connected with the mass block 10, and the damping and silencing assembly 9 is connected with both sides of the fan-shaped frame 11.

[0069] In this way, when the saw blade base 13 works, the damping and silencing structure is arranged in the vibration absorption groove 14, which can effectively block the vibration propagation, reduce the vibration level generated in the cutting process of the circular saw blade, minimize the noise pollution, improve the quietness and comfort of the working environment, reduce the influence of the circular saw blade vibration on the cutting material, and improve the cutting precision and processing efficiency.

[0070] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vibration and sound damping structure, characterized by, The fan-shaped frame includes a plurality of fan-shaped frames, and at least two groups of damping and silencing components are arranged in the fan-shaped frame along the radial direction of the fan-shaped frame. The damping and silencing components include a plurality of asymmetric star-shaped units, which are sequentially connected in a row or a column along the polar coordinate direction, or are arranged in multiple rows and multiple columns along the polar coordinate direction. The width of the damping and silencing components on one side along the polar coordinate direction is greater than that on the other side. The asymmetric star-shaped unit is hollow, and at least four corners are arranged outward in a first plane, and the multiple corners are sequentially connected in the first plane, wherein part of the corners are arranged toward a first side of the asymmetric star-shaped unit, and the other part of the corners are arranged toward a second side of the asymmetric star-shaped unit, the first side and the second side are oppositely arranged, and the distance between the two corners toward the second side of the asymmetric star-shaped unit is greater than the distance between the two corners toward the first side. Masses are connected between adjacent two groups of damping and silencing components, the innermost damping and silencing component is connected with a first arc surface of the fan-shaped frame, and the outer side of the outermost damping and silencing component is connected with a second arc surface of the fan-shaped frame. The fan-shaped frame is provided with multiple damping components, and the damping components include a plurality of asymmetric star-shaped units. The outer side of the outermost fan-shaped frame is also provided with a damping component.

2. The vibration and sound damping structure according to claim 1, wherein The damping and silencing structure includes a plurality of damping and silencing components. The asymmetric star-shaped unit is also provided with four corners in a second plane, and the first plane and the second plane are perpendicular, and the second plane passes through the first connecting rod and the third connecting rod.

3. The vibration and sound damping structure according to claim 1, wherein The asymmetric star-shaped unit is provided with four outward corners and four inward corners in the first plane, and the outward corners and the inward corners are alternately arranged, the outward corners are sequentially a first corner, a second corner, a third corner and a fourth corner, the first corner and the second corner have the same angle, the third corner and the fourth corner have the same angle, and the angle of the third corner is smaller than that of the first corner.

4. The vibration and sound damping structure according to claim 3, wherein The distance between the third corner and the fourth corner is greater than the distance between the first corner and the second corner. The interval angle between the third corner and the fourth corner is greater than the interval angle between the first corner and the second corner.

5. The vibration and sound damping structure according to claim 3, wherein The lengths of the two sides of the first corner are the same, and the lengths of the two sides of the second corner are the same. The length of one side of the third corner close to the fourth corner is greater than that of the other side, and the length of one side of the fourth corner close to the third corner is greater than that of the other side.

6. The vibration and sound damping structure according to claim 3, wherein The first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are arranged at the connection between the first corner and the second corner, between the second corner and the third corner, between the third corner and the fourth corner, and between the fourth corner and the first corner, respectively, the free end of the first connecting rod is flush with the first corner and the second corner, and the free end of the third connecting rod exceeds the third corner and the fourth corner.

7. A vibration and sound damping structure according to claim 6, wherein The first connecting rod and the third connecting rod are located on the same straight line, and the second connecting rod and the fourth connecting rod are located on the same arc line.

8. A saw blade base body, characterized in that a plurality of vibration absorption grooves are arranged in the radial direction of the saw blade base body, and a vibration absorption and sound reduction structure according to claim 1 is arranged at each of the vibration absorption grooves, and the vibration absorption grooves are arranged at a distance from the mounting holes of the saw blade base body and at a distance from the saw teeth of the saw blade base body.

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