Integrated fan and sanding machine

Abstract

The utility model discloses an integrated fan and a sanding machine. The integrated fan comprises a mounting part, and the mounting part is provided with a first surface and a second surface which are oppositely arranged in the preset direction. The first surface is provided with a plurality of first blades protruding in the preset direction and a first balance weight area, the first balance weight area is at least partially overlapped with the first blades, the second surface is provided with a plurality of second blades protruding in the preset direction and a second balance weight area, and the second balance weight area is at least partially overlapped with the second blades. The integrated fan further comprises a balance weight component, the balance weight component is combined with the first blade or the second blade, and the density of the balance weight component is larger than that of the first balance weight area or the second balance weight area. According to the integrated fan and the sanding machine, the influence on the overall working performance of the sanding machine can be avoided.

Description

Technical Field

[0001] The present application relates to the technical field of electric tools, and in particular to an integrated fan and sander. Background Art

[0002] With the continuous advancement of manufacturing technology, various tools that facilitate construction operations have begun to emerge. The use of construction tools can improve the efficiency of construction workers and ensure precision during the construction process. Sanders are a commonly used grinding and polishing tool, widely used in construction, furniture painting, bathroom fixtures, and other applications such as cleaning, deburring, and leveling large surfaces. The structure of a sander typically includes a casing, a motor, a fan assembly, an eccentric element, and a base plate assembly. The casing houses the motor, fan element, and eccentric element. The base plate assembly is at least partially located outside the casing and is used to connect sandpaper. The eccentric element drives the base plate assembly to oscillate about the central axis of the motor, thereby enabling the sandpaper to grind and polish the workpiece. The fan element is used to generate dust collection and / or heat dissipation airflow when the motor is running. To reduce height, a double-sided fan with integrated dust collection and heat dissipation is typically used.

[0003] To reduce vibration during operation, existing sanding machines often incorporate a balancing structure to counteract the eccentric force of the baseplate assembly. Various balancing layouts are used to facilitate installation and simplify the structure. One approach involves directly attaching the balancing structure to the fan element or integrally molding it. However, this often results in excessively large balancing structures (e.g., aluminum alloy fans), compromising the cooling and dust collection capabilities of the integrated fan. Other approaches employ denser materials, such as zinc alloy, to minimize the volume of the counterweight. However, the high cost of zinc alloy (approximately twice that of aluminum alloy fans) results in higher overall machine costs and compromises cost-effectiveness. Alternatively, a fan with a plastic base and zinc / iron inserts injection-molded achieves a balanced balance between size and cost. However, the double-sided structure of the integrated plastic fan results in poor fan rigidity, causing resonance and numbness. Another approach employs a separate balancing block, typically constructed from denser steel or copper. However, due to the significant unbalanced force, the balancing block is typically larger (in terms of diameter and thickness). The consequence is that the diameter of the sealing balance weight's support ring is too large, forcing the base plate gasket to avoid the enlarged support ring. This results in a reduction in the axial thickness of the base plate gasket at the clearance point, which affects its cushioning capacity and thus the vibration performance. If the support ring is not avoided, the overall height of the machine will increase. This is particularly true for circular sanders, where the increased height will shift the center of gravity upward, affecting the vibration performance. Therefore, how to design the sander's counterweight structure to avoid affecting the sander's overall performance is a critical issue. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide an integrated fan and sander, which can avoid affecting the overall working performance of the sander.

[0005] In order to solve the above-mentioned technical problems, an embodiment of the present application provides an integrated fan. The integrated fan includes a mounting portion, the mounting portion having a first surface and a second surface arranged opposite to each other along a preset direction. The first surface has a plurality of first blades protruding around the preset direction and a first counterweight area, and the first counterweight area at least partially overlaps the first blades. The second surface has a plurality of second blades protruding around the preset direction and a second counterweight area, and the second counterweight area at least partially overlaps the second blades. The integrated fan also includes a counterweight component, the counterweight component is combined with the first blade or the second blade, and the density of the counterweight component is greater than the density of the first counterweight area or the second counterweight area.

[0006] An embodiment of the present application further provides a sanding machine, which includes the above-mentioned integrated fan.

[0007] The integrated fan and sander provided in the embodiments of the present application utilize various counterweight structures when designing the counterweight structure for the counterweight area on the surface of the mounting portion. The counterweight component is constructed of a different material than the blades, and the counterweight component is constructed of a material with a higher density than the blades. By using a higher-density material to construct the counterweight component, the fan's volume can be significantly reduced while maintaining the same mass, thereby preventing the fan's dust collection or cooling performance from being affected by the counterweight's bulk. This also prevents any impact on the configuration of other components in the sander, thereby preventing any impact on the sander's overall performance.

[0008] In some embodiments, the counterweight component is mounted on the first blade, and the counterweight component is mounted on the second blade. In this way, by mounting the counterweight components on the blades on the first surface and the second surface at the same time, the counterweight volume on both sides of the fan can be reduced.

[0009] In some embodiments, the counterweight component is configured as a screw structure, and the counterweight component is threadedly connected to the first blade or the second blade. In this way, the counterweight component can be easily connected and fixed by adopting the form of threaded engagement, and is conducive to subsequent disassembly and replacement.

[0010] In some embodiments, at least a portion of the counterweight component is embedded in the first blade or the second blade. In this way, by embedding at least a portion of the counterweight component in the blade, the connection between the counterweight component and the blade can be ensured and the space occupied can be reduced.

[0011] In some embodiments, the weight components are located within a predetermined range of the first or second weight zones, with the boundary of the predetermined range passing through the center of the mounting portion and forming a 45-degree angle with the centerline of the first or second weight zones. This allows the weight components to be distributed near the eccentric position, ensuring a balanced weight balance.

[0012] In some embodiments, the number of first blades located in the first counterweight region on the first surface is less than or equal to 6, and the number of second blades located in the second counterweight region on the second surface is less than or equal to 5. In this way, the counterweight volume can be reduced by controlling the number of blades in the counterweight region.

[0013] In some embodiments, the number of first blades connected to the counterweight components on the first surface is an odd number, and the first blades connected to the counterweight components are adjacent to each other, and / or the number of second blades connected to the counterweight components on the second surface is an odd number, and the second blades connected to the counterweight components are adjacent to each other. In this way, by connecting the counterweight components to an odd number of blades, uniform weight distribution can be ensured.

[0014] In some embodiments, the number of the counterweight components is less than or equal to the number of the first blades or the second blades. In this way, the counterweight volume can be reduced by controlling the distribution number of the counterweight components.

[0015] In some embodiments, the first blade or the second blade is made of a light metal, and the counterweight is made of a heavy metal. In this way, different counterweight structures can be made by selecting metals of different densities, which is beneficial for ensuring structural strength and reducing the counterweight volume.

[0016] The integrated fan in this application utilizes different materials in the counterweight region to form different counterweight structures. This means that multiple counterweight structures are used in conjunction with each other, each with varying densities. For counterweight structures of the same mass, the introduction of a higher-density counterweight effectively reduces the volume of the counterweight structure, thereby preventing the counterweight structure from occupying a large space within the integrated fan and affecting the fan's dust collection or heat dissipation efficiency. This also prevents any impact on the configuration of other components within the sander, thereby preventing any impairment of the sander's overall performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of an integrated fan provided in some embodiments of the present application;

[0019] Figure 2 is a schematic diagram of the three-dimensional structure of the integrated fan provided in some embodiments of the present application from another perspective;

[0020] Figure 3 is a schematic top view of the integrated fan provided in some embodiments of the present application;

[0021] Figure 4 is a schematic diagram of the three-dimensional structure of the integrated fan provided in some embodiments of the present application from another perspective;

[0022] Figure 5 is a schematic diagram of the three-dimensional structure of a sanding machine provided in some embodiments of the present application;

[0023] Figure 6 is a schematic cross-sectional structural diagram of a sanding machine provided in some embodiments of the present application;

[0024] Figure 7 It is a schematic diagram of the exploded structure of the sanding machine provided in some embodiments of the present application. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below with reference to the accompanying drawings. However, it will be understood by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in the present application can be implemented. The division of the following embodiments is for convenience of description and should not constitute any limitation on the specific implementation of the present application. The various embodiments can be combined with each other and referenced to each other under the premise of no contradiction.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0027] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections, or electrical connections; direct connections, or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0028] See also Figures 1 to 7 As shown, the sanding machine includes a housing 110, a drive assembly 120 mounted within the housing 110, an integrated fan 10 connected to the drive assembly 120, a base assembly 130 driven by the drive assembly 120, and a switch 140 for controlling the operation of the sanding machine. The drive assembly 120 includes a motor axis L and a motor that rotates along the motor axis L. The motor, serving as the prime mover of the sanding machine, is disposed within the housing 110. The motor includes a motor shaft for transmitting power to the fan assembly. The motor shaft rotates along the motor axis L, and the motor axis L extends substantially in the vertical direction.

[0029] An air inlet, an air outlet and a dust outlet are formed on the casing 110. The integrated fan 10 is fixedly connected to the motor shaft, that is, when the motor rotates, the integrated fan 10 runs accordingly. When the integrated fan 10 rotates, the air flow enters from the air inlet, flows through the motor and other components, and finally flows out from the air outlet, thereby achieving the effect of dissipating heat for the motor and other components in the casing 110. On the other hand, the air flow can also effectively blow the dust processed on the base plate assembly 130 to the dust outlet, and finally enter the dust collection box, thereby achieving the effect of dust collection. When the motor rotates through the energy source provided by the power cord 150, it drives the integrated fan 10 to rotate around the motor axis L, generating dust collection airflow and / or heat dissipation airflow.

[0030] The base plate assembly 130 includes a support ring 136 located in a groove of the base plate 138. The support ring 136 is used to install the balancing weight 31, thereby reducing the impact force generated when the balancing weight 31 performs eccentric movement, playing a certain buffering role, and thus reducing the vibration of the entire machine. The base plate assembly 130 also includes a bearing seat 131 installed on the integrated fan 10, a first bearing 132 installed in the bearing seat 131, and a bearing pressure plate 135 connected to the bearing seat 131. The balancing weight 31 is used to balance the base plate assembly 130. In the direction along the motor axis L, the balancing weight 31 is arranged between the integrated fan 10 and the base plate assembly 130. The balancing weight 31 and the eccentric element 21 are detachably connected, that is, the eccentric element 21 and the balancing weight 31 constitute synchronous movement, and the balancing weight 31 can rotate around the motor axis L with the eccentric element 21. The bearing seat 131, the bearing pressure plate 135, the first bearing 132, and the gasket 133 attached to the surface of the first bearing 132 are axially locked by the locking screw 134, and the fastening screw 137 passes through the mounting hole of the base plate assembly 130 and into the bearing pressure plate 135, thereby being fixed to the bearing seat 131.

[0031] See also Figures 1 to 4 As shown, the integrated fan 10 includes a mounting portion 11, the mounting portion 11 has a Figure 1 A first surface 101 and a second surface 102 are disposed opposite each other (in the direction indicated by the arrow X in the middle). The first surface 101 has a plurality of first blades 12 protruding in a predetermined direction and a first counterweight region 103. The first counterweight region 103 at least partially overlaps the first blades 12. It should be noted that the first counterweight region 103 is a thickened counterweight area, and the first blades 12 are scattered within this area. In other words, part of the structure of the first blades 12 overlaps with the first counterweight region 103. The second surface 102 has a plurality of second blades 13 protruding in a predetermined direction and a second counterweight region 104. The second counterweight region 104 at least partially overlaps with the second blades 13. It should be noted that the second counterweight region 104 is also a thickened counterweight area, and the second blades 13 are scattered within this area. In other words, part of the structure of the first blades 13 overlaps with the second counterweight region 104. The integrated fan 10 further includes a counterweight component 14 , which is coupled to the first blade 1011 or the second blade 1021 . The density of the counterweight component 14 is greater than that of the first counterweight region 103 or the second counterweight region 104 .

[0032] The mounting portion 11 is a key component of the integrated fan 10, providing a foundation not only for the installation of the integrated fan 10 but also for the arrangement of the blades. The mounting portion 11 can be configured in a disc shape, with a through hole at the center thereof for connection to a rotating shaft. Furthermore, the mounting portion 11 can be connected to a biasing element 21, which is eccentrically positioned relative to the axis of rotation of the rotating shaft. When the motor in the sanding machine drives the rotating shaft to rotate, the biasing element 21 can cause the base plate assembly to oscillate, thereby grinding the workpiece surface.

[0033] The first surface 101 and the second surface 102 are two larger surfaces of the mounting portion 11. The first surface 101 and the second surface 102 are arranged in sequence along a preset direction, which coincides with or is parallel to the rotation axis of the integrated fan 10. The first surface 101 and the second surface 102 are provided with different types of blades to respectively realize the heat dissipation function and the dust collection function. Figures 1 to 4 As shown, a cooling fan can be provided on the first surface 101, and a dust collecting fan can be provided on the second surface 102. The blades on different surfaces are arranged around a preset direction. The first blade 12 and the second blade 13 are thickened blades provided on the surface of the mounting portion 11. At the same time, a conventional blade 105 of smaller thickness is also provided on the surface of the mounting portion 11. The blades can be integrally formed with the mounting portion 11 to ensure the strength of the overall structure. At the same time, the manufacturing material can be a high-strength metal material, such as aluminum alloy, which can reduce the manufacturing cost while ensuring strength.

[0034] The first surface 101 and the second surface 102 are respectively provided with a counterweight area, which is the area on the surface of the mounting portion 11 of the integrated fan 10 where weight needs to be added. By increasing the distributed weight in the counterweight area, the overall weight balance and center of mass matching of the integrated fan 10 can be achieved, thereby reducing the impact of the eccentric force formed by the eccentric movement of the deflecting element 21 on the operator's hand numbness. The first counterweight area 103 on the first surface 101 and the second counterweight area 104 on the second surface 102 are located on different sides of the preset direction to perform weight matching in different areas of the integrated fan 10. The blades located in the counterweight area have a larger mass. For example, the blades located in the counterweight area can be thickened. At the same time, each counterweight area is provided with various forms of counterweight structures.

[0035] The counterweight component 14 is made of a material with a higher density than the blades. For example, if the blades are made of aluminum alloy, the counterweight component 14 can be made of zinc. The counterweight component 14 can be fixed to the blades to simplify the connection structure. The higher density of the counterweight component 14 can significantly reduce its own size while adding the same amount of mass, thereby reducing the counterweight volume, thereby minimizing the impact on the normal operation of the blades.

[0036] The integrated fan 10 provided in some embodiments of the present application adopts various forms of counterweight structures when designing the counterweight structure for the counterweight area on the surface of the mounting portion 11. The counterweight component 14 is made of a material different from that of the blades, and the counterweight component 14 is made of a material with a higher density than that of the blades. By using a material with a higher density to make the counterweight component 14, the volume itself can be greatly reduced while increasing the same mass, thereby avoiding affecting the dust collection effect or cooling effect of the fan due to the large volume of the counterweight. It also avoids affecting the settings of other components in the sander, thereby avoiding affecting the overall working performance of the sander.

[0037] In some embodiments, both the first blade 12 and the second blade 13 may be provided with a weight component 14 , that is, the weight component 14 may be installed on the first blade 12 , and the weight component 14 may also be installed on the second blade 13 .

[0038] like Figure 2 As shown, the first blade 12 is connected to a counterweight component 14. Figure 3 As shown, the second blade 13 is connected to a counterweight component 14. By connecting the counterweight component 14 to the blades located in the counterweight area on both the first surface 101 and the second surface 102, the counterweight volume on both sides of the fan can be reduced, thereby ensuring the dust collection and cooling effects of the fan.

[0039] In addition, the counterweight component 14 may adopt a screw structure, and the counterweight component 14 is threadedly connected to the first blade 12 or the second blade 13 .

[0040] That is to say, the counterweight component 14 is locked on the blade by screwing. The counterweight component 14 can be provided with an external thread, and a hole can be made on the blade, and the hole wall on the blade is provided with an internal thread. The counterweight component 14 can be connected and fixed to the blade by threaded fitting. By adopting the threaded fitting form, the connection and fixation between the counterweight component 14 and the blade can be easily achieved. At the same time, the counterweight component 14 can be disassembled and replaced when necessary. In actual circumstances, the counterweight component 14 can be screwed, and holes can be tapped on the top surface of the blade away from the mounting portion 11 for screw installation. Because the density of the screw is about 2.5 times that of aluminum alloy, the counterweight part of the same mass can be reduced by 2.5 times in volume by using screws for counterweighting, which can effectively reduce the excessive volume of the counterweight and affect the dust collection efficiency or cooling efficiency.

[0041] In some embodiments, the counterweight component 14 can be axially symmetrical or have a centerline of rotation, resulting in a relatively uniform weight distribution on both sides of the counterweight component 14's centerline. When the counterweight component 14 is attached to the blade, the centerline of the counterweight component 14 can be aligned parallel to a predetermined direction. This ensures that the direction of gravity on the counterweight component 14 remains substantially parallel to the predetermined direction, ensuring the stability of the counterweight component 14 during weight balancing.

[0042] In some embodiments, at least a portion of the weight component 14 may be embedded in the first blade 12 or the second blade 13 .

[0043] When mated with the blade, the counterweight component 14 can be partially or fully embedded in the blade. By embedding at least partially within the blade, interference with other components can be reduced and space usage can be avoided. This also ensures a sufficient mating area between the counterweight component 14 and the blade, improving the reliability of the connection between the counterweight component 14 and the blade. In practice, after being embedded in the blade, the counterweight component 14 can remain flush with the blade surface.

[0044] In addition, the counterweight component 14 can be located within a predetermined range of the first counterweight area 103 or the second counterweight area 104 , with the boundary line of the predetermined range passing through the center of the mounting portion 11 and forming a 45-degree angle with the center line of the first counterweight area 103 or the second counterweight area 104 .

[0045] The boundary line of the predetermined range is defined within the counterweight area to form the boundary of an area of ​​a certain size, and the center line of the counterweight area passes through the center of the mounting portion 11 and the midpoint of the arc-shaped boundary of the counterweight area at the edge of the mounting portion 11. The direction of the center line of the counterweight area is the eccentric positive orientation. In other words, the counterweight component 14 can be arranged within a 45-degree fan-shaped area formed by offsetting counterclockwise or clockwise with the eccentric positive orientation as the reference. By limiting the counterweight component 14 to a certain range, it can be ensured that the weight can be distributed in an area close to the eccentric positive orientation, which is conducive to improving the overall balance of the integrated fan 10.

[0046] In some embodiments, the number of first blades 12 located in the first counterweight area 103 of the first surface 101 is less than or equal to 6, and the number of second blades 13 located in the second counterweight area 104 of the second surface 102 is less than or equal to 5.

[0047] The first surface 101 is the side for passive balancing, and the second surface 102 is the side for active balancing. By controlling the number of blades in the counterweight area, the overall counterweight volume can be controlled. In practice, the blades in the counterweight area can be heavier than the other blades. For example, the blades in the counterweight area can be thickened.

[0048] In addition, the number of first blades 12 connected to the counterweight component 14 on the first surface 101 is an odd number, and the first blades 12 connected to the counterweight component 14 are adjacent to each other, and / or the number of second blades 13 connected to the counterweight component 14 on the second surface 102 is an odd number, and the second blades 13 connected to the counterweight component 14 are adjacent to each other.

[0049] By connecting the weight components 14 to an odd number of adjacent blades, the uniformity of weight distribution on both sides of the fan's overall eccentric position can be ensured. In practice, the weight components 14 can be arranged on blades within 45 degrees of the eccentric position.

[0050] In some embodiments, the number of blades located in the counterweight area may also be an odd number, such as 1, 3, or 5. Figure 3 As shown, the number of blades located in the counterweight area is 5. This way, once the counterweight is balanced, on the one hand, the dust collection effect of the dust collecting blades and the cooling effect of the heat dissipation blades are less affected; on the other hand, the fan's own operating stability can be adjusted, improving the sander's operating efficiency.

[0051] In some embodiments, the number of weight members 14 may be less than or equal to the number of first blades 12 or second blades 13 .

[0052] That is to say, the counterweight component 14 is arranged on the blade located in the counterweight area, and is arranged on part or all of the counterweight blades, which is conducive to achieving force balance and center of mass balance.

[0053] In addition, while introducing the counterweight component 14 to reduce the volume of the counterweight, the volume of the portion of the counterweight component 14 that performs the counterweighting can also be reduced. This helps to reduce the impact on the thinning area of ​​the base plate and improve the strength of the base plate. In actual circumstances, a counterweight block structure 15 can be formed by protruding from the surface of the mounting portion 11. The counterweight block structure 15 can be set in a larger area on the surface of the mounting portion 11 to effectively increase the weight of the counterweight. At the same time, the counterweight block structure 15 can be made of the same material as the mounting portion 11 or the blade to reduce production costs. The counterweight block structure 15 and the mounting portion 11 can be made in an integrally molded form.

[0054] The height of the fan-shaped counterweight for active balancing on the side where the dust collecting blades are located can be designed to be less than 4 mm, and the height of the fan-shaped counterweight for passive balancing on the side where the heat dissipating blades are located can be designed to be less than 3 mm. That is, the height of the counterweight structure 15 on the first surface 101 in the preset direction is less than or equal to 3 mm, and the height of the counterweight structure 15 on the second surface 102 in the preset direction is less than or equal to 4 mm.

[0055] It is worth mentioning that after the volume of the integrated fan is controlled, the area of ​​the thinned area of ​​the base plate pad can be less than or equal to 7% of the entire base plate area, which is smaller than the thinned area of ​​the independent balancing block, which is usually 8%, so that the impact on the base plate pad is smaller.

[0056] In some embodiments, the first blade 12 or the second blade 13 may be made of light metal, and the weight component 14 may be made of heavy metal.

[0057] For example, the first blade 12 or the second blade 13 may be made of aluminum or an aluminum alloy with a lower density, and the weight component 14 may be made of zinc or a zinc alloy with a higher density.

[0058] In the counterweight design of the integrated fan 10, a counterweight method combining counterweight blades with different forms of counterweight structures is adopted. This design scheme can reduce the large counterweight volume caused by the pure aluminum alloy fan counterweight, the higher cost of the zinc alloy fan, the low rigidity of the plastic embedded metal block fan, the thin base pad in a large area caused by the independent balance block counterweight, and the problem that too much counterweight of the aluminum alloy fan affects the dust collection effect, thereby achieving a good balance between functionality (heat dissipation, dust collection, balance), economy and processability.

[0059] Taking aluminum alloy as an example, the new solution is characterized by the integrated fan counterweight part. Since the density of screws is about 2.5 times that of aluminum alloy, the counterweight part of the same mass can be reduced by 2.5 times in volume by using screw counterweights, which can effectively reduce the impact of excessive counterweight volume on dust collection efficiency.

[0060] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present application, and that in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. An integrated fan, characterized in that: include: The mounting portion has a first surface and a second surface arranged opposite to each other along a preset direction, the first surface has a plurality of first blades and a first counterweight area protruding around the preset direction, the first counterweight area at least partially overlaps the first blades, the second surface has a plurality of second blades and a second counterweight area protruding around the preset direction, the second counterweight area at least partially overlaps the second blades, the integrated fan also includes a counterweight component, the counterweight component is combined with the first blade or the second blade, and the density of the counterweight component is greater than the density of the first counterweight area or the second counterweight area.

2. The integrated fan according to claim 1, wherein: The weight component is mounted on the first blade, and the weight component is mounted on the second blade.

3. The integrated fan according to claim 1 or 2, characterized in that: The weight component is configured as a screw structure, and the weight component is threadedly connected to the first blade or the second blade.

4. The integrated fan according to claim 1, wherein: At least a portion of the counterweight component is embedded in the first blade or the second blade.

5. The integrated fan according to claim 1, wherein: The counterweight component is located within a predetermined range of the first counterweight area or the second counterweight area, and a boundary line of the predetermined range passes through the center of the mounting portion and forms a 45-degree angle with a center line of the first counterweight area or the second counterweight area.

6. The integrated fan according to claim 1, characterized in that: The number of the first blades on the first surface located in the first counterweight area is less than or equal to 6, and the number of the second blades on the second surface located in the second counterweight area is less than or equal to 5.

7. The integrated fan according to claim 6, characterized in that: The number of the first blades connected to the counterweight component on the first surface is an odd number, and the first blades connected to the counterweight component are adjacent to each other, and / or the number of the second blades connected to the counterweight component on the second surface is an odd number, and the second blades connected to the counterweight component are adjacent to each other.

8. The integrated fan according to claim 6, characterized in that: The number of the counterweight components is less than or equal to the number of the first blades and the second blades.

9. The integrated fan according to claim 1, wherein: The first blade or the second blade is made of light metal, and the counterweight component is made of heavy metal.

10. A sanding machine, characterized in that: The integrated fan comprises the integrated fan according to any one of claims 1 to 9.

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