Silent damper actuator motor

Abstract

The application relates to a mute damper actuator motor, belonging to the technical field of motors, which comprises a cover, a casing, a middle plate, a brush assembly, a rotor assembly and a magnetic strip, the cover and the casing are in a full-sealing structure, at least two first positioning holes are arranged on the cover, at least one second positioning hole is arranged at the bottom of the casing, the first positioning hole and the second positioning hole are blind holes; the middle plate, the brush assembly, the rotor assembly and the magnetic strip are arranged inside the cover and the casing, the bottom of the rotor assembly penetrates through the casing, the top of the rotor assembly penetrates through the middle plate and the cover in sequence, the middle plate is arranged at the bottom of the cover, the brush assembly is arranged at the bottom of the middle plate, and the magnetic strip is arranged outside the rotor assembly. The application can effectively reduce the noise of the damper actuator motor during use.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a silent damper actuator motor. Background Technology

[0002] The core working principle of a damper actuator is to achieve precise control over the opening and closing angle and position of the damper through a drive device and transmission mechanism. Therefore, the motor is one of the most important components of a damper actuator. However, existing damper actuator motors generally suffer from high noise levels during use. The noise level of a single motor is between 24 and 28 decibels, resulting in an overall noise level of over 31 decibels after installation in the actuator. The noise level is even higher when the motor starts and stops in both forward and reverse directions, thus affecting the user experience. Utility Model Content

[0003] The purpose of this application is to provide a silent damper actuator motor that can effectively reduce the noise during the use of the damper actuator motor.

[0004] The silent damper actuator motor provided in this application adopts the following technical solution:

[0005] A silent damper actuator motor includes a cover, a housing, a middle plate, a brush assembly, a rotor assembly, and a magnetic strip. The cover and housing are fully sealed structures. The cover has at least two first positioning holes, and the bottom of the housing has at least one second positioning hole. The first and second positioning holes are blind holes.

[0006] The middle plate, brush assembly, rotor assembly, and magnetic strip are installed inside the cover and housing. The bottom of the rotor assembly passes through the housing, and the top of the rotor assembly passes through the middle plate and the cover in sequence. The middle plate is installed at the bottom of the cover, the brush assembly is installed at the bottom of the middle plate, and the magnetic strip is sleeved on the outside of the rotor assembly.

[0007] By adopting the above technical solution, this application transforms all external components such as the housing and iron cover into a fully sealed structure. Specifically, the positioning holes are replaced with countersunk holes and blind holes, eliminating the need for perforation at the top magnetic position and removing the brush hole. This fully sealed design of the housing and cover effectively reduces internal noise leakage. Simultaneously, all internal components of the housing and iron cover are compactly structured and firmly joined, preventing loosening during motor operation and further reducing noise caused by structural loosening. This effectively lowers the noise level of the damper actuator motor during operation.

[0008] Preferably, the bottom of the middle plate is provided with a plurality of top magnetic columns, and the casing near the bottom is provided with a plurality of top magnetic positions protruding inward;

[0009] The bottom of the magnetic strip is mounted on the top magnetic position, and the top of the magnetic strip abuts against the top magnetic column.

[0010] By adopting the above technical solution, this application fixes the magnetic strip between the top magnetic position and the top magnetic column by interfering with the top magnetic column of the middle plate during motor installation, ensuring that the magnetic strip is fixed and that no noise will be generated due to loosening during use.

[0011] Preferably, the top of the middle plate is provided with a plurality of cold riveting posts, and the cover is provided with a plurality of cold riveting holes. The cold riveting posts and the cold riveting holes cooperate to cold rivet the middle plate and the cover.

[0012] By adopting the above technical solution, the cold riveting posts of the middle plate and the cold riveting holes of the cover are matched, and the middle plate and the cover are firmly connected by cold riveting, further ensuring the fully sealed external structure.

[0013] Preferably, the brush assembly includes at least two brushes, each brush including a brush needle and a terminal, one end of the brush needle is in contact with the rotor assembly, the other end of the brush needle is connected to one end of the terminal, and the other end of the terminal passes through the middle plate and the cover in sequence.

[0014] The connection between the terminal and the middle plate is provided with a first protrusion and a second protrusion. The connection between the middle plate and the terminal is provided with a brush groove. The first protrusion is interference-fitted with the brush groove, and the second protrusion protrudes from the top of the middle plate.

[0015] By adopting the above technical solution, the terminals of the brush assembly of this application are interference-fitted with the brush groove of the middle plate through the first protrusion, and the second protrusion is exposed on the surface of the middle plate. By pushing the second protrusion open, the terminals can be effectively prevented from sinking and loosening due to the heat of the solder.

[0016] Preferably, the rotor assembly includes a shaft support, a chip nested outside the shaft support, and winding copper wire wound inside the chip. The bottom of the shaft support passes through the housing, and the top of the shaft support passes through the middle plate and the cover in sequence. The chip is covered with an insulating powder layer.

[0017] The rotor assembly also includes an oil baffle, a commutator, and a pressure-sensitive plate, which are sequentially mounted on the shaft support. The commutator is in contact with the brush needles.

[0018] By adopting the above technical solution, this application uses an oil-blocking gasket to seal the gap between the cover and the rotor assembly, ensuring that coolant and engine oil do not leak. Simultaneously, it absorbs vibrations during operation, improving the stability of motor operation. The commutator, in conjunction with the brushes, changes the current direction to achieve the motor's commutation function. The pressure-sensitive sheet detects pressure changes and converts them into electrical signals. This application features a structure with an insulating powder coating on the outside of the rotor chips, making the bonding between the rotor chips more robust. All chips and the coating powder are integrated into one unit, eliminating additional wind resistance noise during rotor operation and further reducing noise during motor operation.

[0019] Preferably, the chip includes three sets of connecting portions and arc portions, which are spaced 120° apart around the axis.

[0020] By adopting the above technical solution, the rotor chip thickness of this application is divided into 1 / 3 segments. In this way, the thickness of 1 / 3 chip is staggered by 120° from the thickness of the other two 1 / 3 chips. The problem of uneven thickness of chip material that is easy to occur during material supply can be solved by dividing the circumference equally by 360°, so that the circumferential weight of the rotor assembly is more evenly distributed, thereby making the rotor more stable when the motor is running.

[0021] Preferably, the rotor assembly is provided with a stop plate at the connection between it and the cover and the housing, and the stop plate is a PEEK plate.

[0022] By adopting the above technical solution, the PEEK sheet of this application has the advantages of relatively smooth surface, low frictional resistance and low vibration, and as a stop sheet, it can further reduce the noise of motor operation.

[0023] Preferably, both the housing and the cover have shaft holes at the points where the rotor assembly passes through, and the single-sided clearance of the shaft holes is 0.002 mm.

[0024] By adopting the above technical solution, this application can further reduce the gap noise between the shaft support and the shaft hole by reducing the gap of the shaft hole to 0.002mm on one side.

[0025] Preferably, the outer diameter of the chip is 15mm to 18mm.

[0026] By adopting the above technical solution, this application can further reduce the vibration of the rotor during operation by reducing the outer diameter of the rotor chip, thereby reducing the noise during operation.

[0027] Preferably, the surface hardness of the shaft support is HRC55-60, and the roughness is less than Ra0.05.

[0028] By adopting the above technical solution, this application further reduces the noise during motor operation by selecting materials with greater hardness and lower roughness.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. This application changes all external components such as the casing and iron cover to a fully sealed structure. The positioning hole is changed to a countersunk hole and is designed as a blind hole. The top magnetic position does not need to be perforated, and the brush hole is eliminated, so that the casing and cover are designed as a fully sealed structure, which can effectively reduce the leakage of internal sound.

[0031] 2. All the internal components of this application are compact and firmly connected, so that the internal components will not loosen when the motor is running, which can further reduce the abnormal noise caused by the internal components due to structural loosening, thereby effectively reducing the noise of the damper actuator motor during use.

[0032] 3. This application features a structure with an insulating powder coating on the outside of the rotor chip, which makes the rotor chips bond more firmly. All chips and the coating powder are integrated into one unit, which can eliminate additional wind resistance noise when the rotor is running, further reducing the noise during motor operation. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the motor according to an embodiment of this application;

[0034] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application;

[0035] Figure 3 This is a schematic diagram of the hood structure according to an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the middle plate structure according to an embodiment of this application;

[0037] Figure 5 This is a schematic diagram of the brush structure according to an embodiment of this application;

[0038] Figure 6 This is a schematic diagram of the mounting structure of the middle plate and brush assembly according to an embodiment of this application;

[0039] Figure 7 This is a schematic diagram of the rotor assembly structure according to an embodiment of this application;

[0040] Figure 8 This is a schematic diagram of the chip structure according to an embodiment of this application.

[0041] In the diagram, 1. Cover; 11. First positioning hole; 12. Stop plate; 13. Shaft hole; 14. Cold riveting hole; 2. Housing; 21. Second positioning hole; 22. Top magnetic position; 3. Middle plate; 31. Top magnetic column; 32. Cold riveting column; 33. Brush groove; 4. Brush assembly; 41. Brush needle; 42. Terminal; 421. First protrusion; 422. Second protrusion; 5. Rotor assembly; 51. Shaft support; 52. Chip; 521. Insulating powder layer; 522. Connecting part; 523. Arc part; 53. Winding copper wire; 54. Oil baffle; 55. Commutator; 56. Pressure sensitive sheet; 6. Magnetic strip. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 -Appendix Figure 8 This application provides a clear and complete description of the technical solution. The described embodiments are merely possible technical implementations of this utility model and do not represent the complete implementation of all components. Those skilled in the art can, in conjunction with the embodiments of this utility model, obtain other embodiments without creative effort, and these embodiments are also within the protection scope of this utility model.

[0043] The inventors of this application have discovered that existing damper actuator motors generally suffer from excessive noise during use. The noise level of a single motor is between 24 and 28 decibels, resulting in an overall noise level of over 31 decibels after installation in the actuator. Furthermore, the noise level is even higher when the motor is starting and stopping in both forward and reverse directions, thus affecting the user experience. Therefore, this application mainly adopts a silent damper actuator motor, which can effectively reduce the noise of the damper actuator motor during use. The following is a further detailed description of this application.

[0044] This application provides a silent damper actuator motor, see reference. Figure 1 , Figure 2 , Figure 3 and Figure 4 The assembly includes a cover 1, a housing 2, a middle plate 3, a brush assembly 4, a rotor assembly 5, and a magnetic strip 6. The cover 1 and the housing 2 are fully sealed structures. The cover 1 has at least two first positioning holes 11, and the bottom of the housing 2 has at least one second positioning hole 21. The first positioning holes 11 and the second positioning holes 21 are blind holes. The middle plate 3, the brush assembly 4, the rotor assembly 5, and the magnetic strip 6 are installed inside the cover 1 and the housing 2. The bottom of the rotor assembly 5 passes through the housing 2, and the top of the rotor assembly 5 passes through the middle plate 3 and the cover 1 in sequence. The middle plate 3 is installed at the bottom of the cover 1, the brush assembly 4 is installed at the bottom of the middle plate 3, and the magnetic strip 6 is sleeved on the outside of the rotor assembly 5.

[0045] The implementation principle of this embodiment is as follows: by changing all external components such as the housing 2 and the iron cover to a fully sealed structure, the leakage of internal sound can be effectively reduced. At the same time, all internal components of the housing 2 and the iron cover are compact and firmly connected, so that internal components will not loosen during motor operation, which can further reduce the abnormal noise caused by loose internal components, thereby effectively reducing the noise of the damper actuator motor during operation.

[0046] like Figure 3 As shown, in this embodiment of the application, stop plates 12 are provided at the connection points between the rotor assembly 5 and the cover 1 and the housing 2. The stop plates 12 are preferably PEEK plates. PEEK plates have the advantages of relatively smooth surface, low frictional resistance, and low vibration. As stop plates 12, they can further reduce the noise during motor operation. The housing 2 and the cover 1 both have shaft holes 13 at the points where the rotor assembly 5 passes through. The single-sided clearance of the shaft hole 13 is 0.002 mm. By reducing the clearance of the shaft hole 13 to 0.002 mm, the clearance noise between the shaft support 51 and the shaft hole 13 can be further reduced.

[0047] like Figure 1 , Figure 2 and Figure 4 As shown, in this embodiment, the bottom of the middle plate 3 is provided with 10 top magnetic posts 31, and the housing 2 has 4 top magnetic positions 22 protruding inward near the bottom. The bottom of the magnetic strip 6 is installed on the top magnetic positions 22, and the top of the magnetic strip 6 abuts against the top magnetic posts 31. By interfering with the magnetic strip 6 by using the top magnetic posts 31 of the middle plate 3 during motor installation, the magnetic strip 6 is fixed between the top magnetic positions 22 and the top magnetic posts 31, ensuring that the magnetic strip 6 is in a fixed state and preventing noise caused by loosening during use. In specific implementation, the number of top magnetic posts 31 and top magnetic positions 22 can also be increased or decreased according to actual needs.

[0048] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the top of the middle plate 3 is provided with four cold riveting posts 32, and the cover 1 is provided with four corresponding cold riveting holes 14. The cold riveting posts 32 and the cold riveting holes 14 cooperate to cold rivet the middle plate 3 and the cover 1 together. By cooperating with the cold riveting posts 32 of the middle plate 3 and the cold riveting holes 14 of the cover 1, the middle plate 3 and the cover 1 are firmly connected by cold riveting, further ensuring the fully sealed external structure.

[0049] like Figure 4 , Figure 5 and Figure 6As shown, the brush assembly 4 in this embodiment includes at least two brushes. Each brush includes a brush needle 41 and a terminal 42. One end of the brush needle 41 contacts the rotor assembly 5, and the other end of the brush needle 41 is connected to one end of the terminal 42. The other end of the terminal 42 passes through the middle plate 3 and the cover 1 in sequence. A first protrusion 421 and a second protrusion 422 are provided at the connection between the terminal 42 and the middle plate 3. A brush groove 33 is provided at the connection between the middle plate 3 and the terminal 42. The first protrusion 421 is press-fitted with the brush groove 33, and the second protrusion 422 protrudes from the top of the middle plate 3. By press-fitting the first protrusion 421 of the terminal 42 with the brush groove 33 of the middle plate 3, and by exposing the second protrusion 422 on the surface of the middle plate 3, the second protrusion 422 can be pushed open, which can effectively prevent the terminal 42 from sinking and loosening due to the heat of the solder.

[0050] like Figure 7 As shown, the rotor assembly 5 in this embodiment includes a shaft support 51, a chip 52 nested outside the shaft support 51, and winding copper wire 53 wound inside the chip 52. The bottom of the shaft support 51 passes through the housing 2, and the top passes through the middle plate 3 and the cover 1 in sequence. The chip 52 is covered with an insulating powder layer 521. The rotor assembly 5 also includes an oil baffle 54, a commutator 55, and a pressure-sensitive sheet 56. The oil baffle 54, commutator 55, and pressure-sensitive sheet 56 are sequentially mounted on the shaft support 51. The commutator 55 is in contact with the brush needles 41. The oil baffle 54 seals the gap between the cover 1 and the rotor assembly 5, ensuring that coolant and oil do not leak out. At the same time, it absorbs vibrations during operation and improves the stability of motor operation. The commutator 55 changes the current direction by cooperating with the brushes to realize the commutation function of the motor. The pressure-sensitive sheet 56 is used to detect pressure changes and convert the pressure changes into electrical signals. This application features a structure with an insulating powder coating 521 on the outside of the rotor chip 52, making the bonding between the rotor chips 52 more robust. All chips 52 and the coating powder are integrated, eliminating additional wind resistance noise during rotor operation and further reducing motor noise. In specific implementations, the outer diameter of the chip 52 in this embodiment is 15mm~18mm, preferably 15.8mm, while the conventional chip 52 has an outer diameter of 18.0mm. By reducing the outer diameter of the rotor chip 52, vibration during rotor operation can be further reduced, thereby reducing operating noise. The shaft support 51 is made of 4Cr13 stainless steel with a surface hardness of HRC55~60 and a roughness less than Ra0.05. Conventional shaft supports 51 have a surface hardness of HRC50~55 and a roughness of Ra0.4. By selecting a material with higher hardness and lower roughness, the noise during motor operation is further reduced.

[0051] like Figure 8As shown, the chip 52 in this embodiment includes three sets of connecting portions 522 and arc portions 523, which are spaced 120° apart around the shaft support 51. The rotor chip 52 is segmented into 1 / 3 sections, so that the thickness of 1 / 3 chip 52 is staggered by 120° from the thickness of the other two 1 / 3 chips 52. The problem of uneven thickness of the chip 52 material strip that is prone to occur during material delivery can be solved by dividing the circumference equally by 360°, making the circumferential weight of the rotor assembly 5 more evenly distributed, thereby making the rotor more stable when the motor is running.

[0052] The implementation principle of this embodiment is as follows: To ensure the quiet operation of the motor, this embodiment ensures a sealed external appearance, a compact internal structure, and robust component assembly in its structural design. In terms of process design, it reduces rotor vibration and noise by minimizing clearance in the shaft hole 13, reducing bearing clearance noise, and minimizing the roundness of the commutator 55 and the bearing inner hole, thereby reducing operating noise. Regarding material parameters and characteristics, materials capable of reducing noise are selected.

[0053] This embodiment of the application, based on a conventional structure, modifies all external components such as the housing 2 and the cover 1 into a fully sealed structure to prevent internal sound leakage. Specifically, in the housing 2, the mounting screw holes are eliminated, the positioning holes are replaced with countersunk holes and blind holes, and the top magnetic position 22 is not perforated, making the housing 2 a fully sealed structure. In the cover 1, based on a conventional structure, the two positioning holes are replaced with countersunk holes and blind holes, and the brush hole is eliminated, making the cover a fully sealed structure.

[0054] Internal components are manufactured using methods such as snap-fit ​​points, protrusions, and mating parts to ensure a compact structure and secure connection. This prevents loosening and gaps in the internal components during motor operation, thus avoiding noise caused by structural loosening. Specifically, the four cold-riveting posts 32 of the middle plate 3 mate with the four cold-riveting holes 14 of the cover 1, using cold riveting to securely connect the middle plate 3 to the cover 1. The first protrusion 421 of the brush has an interference fit with the brush groove 33 of the middle plate 3, while the second protrusion 422 protrudes from the surface of the middle plate 3. The second protrusion 422 is then pushed open to prevent the terminal 42 from sinking and loosening due to heat from the solder. The magnetic strip 6 is installed on the top magnetic position 22 of the housing 2. During motor assembly, the top magnetic post 31 of the rear cover middle plate 3 interference fits against the magnetic strip 6, ensuring it remains fixed. After the motor is assembled, the connection between the cover 1 and the housing 2 is changed from four-point riveting to six-point riveting, resulting in a tighter fit between the cover and the housing 2. Compared to the conventional rotor chip 52 with an outer diameter of 18.0 mm, this embodiment uses a chip 52 with an outer diameter of 15.8 mm, reducing the outer diameter of the rotor assembly 5 and lowering vibration during operation. Compared to the conventional rotor insulating plastic sheet structure, the chip 52 has a large gap with the insulating sheet, causing airflow noise during rotor operation. In this embodiment, the rotor assembly 5 uses a coated insulating powder layer 521 structure, making the connection between the rotor chips 52 more robust. All chips 52 and the coated powder layer are integrated, eliminating additional airflow noise during rotor assembly 5 operation.

[0055] Based on conventional processes, this embodiment of the application, after the rotor assembly 5 is shafted into the chip 52, the chip 52 is twisted at two points in a 1 / 3 segment. This offsets the thickness of one 1 / 3 chip 52 by 120° from the other two 1 / 3 chips 52. Due to the uneven thickness of the incoming chip 52 material, it is divided into 360° circumferences, resulting in a more even distribution of the circumferential weight of the rotor assembly 5 and more stable operation. The chip 52 is coated with insulating powder, making the bonding between chips 52 stronger. An automatic material reduction machine can be used, and a milling cutter can be used to correct any imbalance in the thickness of the rotor chip 52, adjusting the dynamic balance during rotor operation and reducing vibration.

[0056] Compared to the conventional commutator 55 soldering process with enameled wire, this embodiment uses a three-electrode one-time resistance welding process to reduce the roundness and step difference of the commutator 55 after welding. This results in a smaller roundness commutator 55 and less friction noise with the brushes. The clearance of the shaft hole 13 is reduced to 0.002mm on one side, further reducing bearing clearance noise. Compared to the conventional rotor rubber column positioning structure, this embodiment uses a rotor pressing copper ring structure. This results in higher positioning accuracy between the rotor copper ring and the shaft support 51, and less internal forward and backward movement of the assembled motor rotor assembly 5. This reduces the amplitude of movement of the rotor assembly 5 during forward and reverse rotation and stopping after the motor is mounted on the actuator, thus reducing sudden changes in sound.

[0057] Based on the selection of conventional material parameters and properties, the shaft support 51 is made of 4Cr13 stainless steel, with the surface hardness increased from the conventional HRC50-55 to HRC55-60, and the roughness increased from the conventional Ra0.4 to Ra0.05Max. At the same time, a relatively smooth PEEK sheet with low frictional resistance and low vibration is selected as the stop plate 12 to further reduce the motor operating noise.

[0058] The embodiments described herein are preferred embodiments and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A silent damper actuator motor, characterized in that, The assembly includes a cover (1), a housing (2), a middle plate (3), a brush assembly (4), a rotor assembly (5), and a magnetic strip (6). The cover (1) and the housing (2) are fully sealed structures. The cover (1) is provided with at least two first positioning holes (11), and the bottom of the housing (2) is provided with at least one second positioning hole (21). The first positioning hole (11) and the second positioning hole (21) are blind holes. The middle plate (3), brush assembly (4), rotor assembly (5) and magnetic strip (6) are installed inside the cover (1) and housing (2). The bottom of the rotor assembly (5) passes through the housing (2), and the top of the rotor assembly (5) passes through the middle plate (3) and cover (1) in sequence. The middle plate (3) is installed at the bottom of the cover (1), the brush assembly (4) is installed at the bottom of the middle plate (3), and the magnetic strip (6) is sleeved on the outside of the rotor assembly (5).

2. The silent damper actuator motor according to claim 1, characterized in that, The bottom of the middle plate (3) is provided with several top magnetic columns (31), and the casing (2) near the bottom is provided with several top magnetic positions (22). The bottom of the magnetic strip (6) is mounted on the top magnetic position (22), and the top of the magnetic strip (6) abuts against the top magnetic column (31).

3. The silent damper actuator motor according to claim 2, characterized in that, The top of the middle plate (3) is provided with several cold riveting posts (32), and the machine cover (1) is provided with several cold riveting holes (14). The cold riveting posts (32) and the cold riveting holes (14) cooperate to fix the middle plate (3) and the machine cover (1) by cold riveting.

4. A silent damper actuator motor according to claim 1, characterized in that, The brush assembly (4) includes at least two brushes, each brush including a brush needle (41) and a terminal (42). One end of the brush needle (41) is in contact with the rotor assembly (5), and the other end of the brush needle (41) is connected to one end of the terminal (42). The other end of the terminal (42) passes through the middle plate (3) and the cover (1) in sequence. The terminal (42) and the middle plate (3) are provided with a first protrusion (421) and a second protrusion (422). The middle plate (3) and the terminal (42) are provided with a brush groove (33). The first protrusion (421) and the brush groove (33) are interference fit. The second protrusion (422) protrudes from the top of the middle plate (3).

5. A silent damper actuator motor according to claim 4, characterized in that, The rotor assembly (5) includes a shaft support (51), a chip (52) nested outside the shaft support (51), and winding copper wire (53) wound inside the chip (52). The bottom of the shaft support (51) passes through the housing (2), and the top passes through the middle plate (3) and the cover (1) in sequence. The chip (52) is covered with an insulating powder layer (521). The rotor assembly (5) also includes an oil baffle (54), a commutator (55) and a pressure-sensitive plate (56), which are sequentially mounted on the shaft support (51), and the commutator (55) is in contact with the brush needle (41).

6. A silent damper actuator motor according to claim 5, characterized in that, The chip (52) includes three sets of connecting parts (522) and arc parts (523), and the three sets of connecting parts (522) and arc parts (523) are spaced 120° apart around the shaft (51).

7. A silent damper actuator motor according to any one of claims 1-6, characterized in that, The rotor assembly (5) is provided with a stop plate (12) at the connection between the rotor assembly (5) and the cover (1) and the housing (2), and the stop plate (12) is a PEEK plate.

8. A silent damper actuator motor according to any one of claims 1-6, characterized in that, Both the housing (2) and the cover (1) have shaft holes (13) at the point where the rotor assembly (5) passes through, and the single-sided clearance of the shaft hole (13) is 0.002 mm.

9. A silent damper actuator motor according to claim 5 or 6, characterized in that, The outer diameter of the chip (52) is 15mm~18mm.

10. A silent damper actuator motor according to claim 5 or 6, characterized in that, The surface hardness of the shaft support (51) is HRC55~60, and the roughness is less than Ra0.05.

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