Actuator with high noise requirement

Abstract

The utility model discloses an actuator with a high noise requirement. The actuator comprises a shell assembly, a motor assembly and a PCB assembly. The shell assembly at least comprises a bottom shell, a first gear set and a top cover, the bottom shell and the top cover form a containing cavity, gears of the first gear set are rotatably installed in the containing cavity, one gear in the first gear set is an output shaft gear, and an output shaft of the output shaft gear extends out of the shell assembly; the motor assembly is fixedly installed in the containing cavity and comprises a motor lower shell, a motor stator, a rotor, a second gear set and a motor upper cover. The motor lower shell and the motor upper cover form an inner cavity, the motor stator is fixedly installed in the inner cavity, the rotor and the second gear set are rotatably installed in the inner cavity, a driving gear of the rotor is meshed with the second gear set, and the second gear set is meshed with the first gear set; the motor stator is electrically connected with the PCB assembly. A motor assembly system is added, the stability, reliability and safety of the system are improved, and the noise of the actuator is reduced.

Description

Technical Field

[0001] The present invention relates to the field of actuators, and in particular to an actuator with high noise requirements. Background Art

[0002] The motor output reduction mechanism inside the automotive actuator uses a multi-stage gear set to reduce the output speed and increase the output torque. Due to the large output torque and the large number of reduction gear stages, the actuator output stability is poor, resulting in actuator noise and other problems. At present, in order to solve this problem, most manufacturers use the method of reducing the gear reduction stage and increasing the gear strength, but this method cannot achieve the purpose of reducing the output speed and increasing the output torque.

[0003] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a new technical solution. Summary of the invention

[0004] In order to solve at least one of the technical problems existing in the prior art, the present invention can provide an actuator with high noise requirements that improves stability and reduces noise. The specific technical solution is as follows:

[0005] The present invention provides an actuator with high noise requirements, which includes a housing component, a motor assembly and a PCB board component;

[0006] The housing assembly at least includes a bottom housing, a first gear set and a top cover, the bottom housing and the top cover form a receiving chamber, the first gear set includes at least one gear, the gear of the first gear set is rotatably mounted in the receiving chamber, one of the gears in the first gear set is an output shaft gear, and the output shaft of the output shaft gear extends out of the housing assembly;

[0007] The motor assembly is fixedly installed in the accommodating cavity, and the motor assembly includes a motor lower shell, a motor stator, a rotor, a second gear set and a motor upper cover; the motor lower shell and the motor upper cover form an inner cavity, the motor stator is fixedly installed in the inner cavity, the second gear set includes at least one gear, the rotor and the second gear set are rotatably installed in the inner cavity, the driving gear of the rotor is meshed with the second gear set, and the second gear set is meshed with the first gear set;

[0008] The PCB board assembly is fixedly installed in the inner cavity or the accommodating cavity, and the motor stator is electrically connected to the PCB board assembly.

[0009] As a preferred solution of the actuator with high noise requirement described in the present invention, the motor assembly is provided with a positioning column, and the bottom shell is provided with a motor positioning hole, and the positioning column is accommodated in the motor positioning hole.

[0010] As a preferred solution of the actuator with high noise requirement described in the present invention, the positioning column is interference-pressed into the positioning hole of the motor.

[0011] As a preferred solution for the actuator with high noise requirements described in the present invention, a first positioning surface and a second positioning surface are further provided on the motor assembly, and a first limit surface and a second limit surface are provided in the bottom shell. When the motor assembly is fixedly installed on the bottom shell, the first positioning surface conflicts with the first limit surface, and the second positioning surface conflicts with the second limit surface.

[0012] As a preferred solution of the actuator with high noise requirement described in the present invention, the first positioning surface is installed with interference fit on the first limiting surface, and the second positioning surface is installed with interference fit on the second limiting surface.

[0013] As a preferred solution of the actuator with high noise requirement described in the present invention, the second gear set includes a second double gear and a third double gear, and the first gear set includes a fourth double gear and an output shaft gear;

[0014] A driving gear is arranged on the rotor, the driving gear is meshed with the large gear of the second duplex gear, the small gear of the second duplex gear is meshed with the large gear of the third duplex gear, the small gear of the third duplex gear is meshed with the large gear of the fourth duplex gear on the first gear set, and the small gear of the fourth duplex gear is meshed with the output shaft gear.

[0015] As a preferred solution of the actuator with high noise requirements described in the present invention, a plurality of cantilever beams are arranged on the upper cover of the motor, a plurality of cantilever beam pressure columns are arranged in the top cover, and the cantilever beams conflict with the cantilever beam pressure columns.

[0016] As a preferred solution of the actuator with high noise requirement described in the present invention, at least three cantilever beams are provided, and the cantilever beams are not in the same straight line.

[0017] As a preferred solution for the actuator with high noise requirements described in the present invention, each gear of the second gear set can be rotatably inserted into the corresponding first gear shaft, one end of the first gear shaft is press-fitted onto the motor stator, and the other end of the gear of the first gear shaft is press-fitted onto the motor cover.

[0018] As a preferred solution of the actuator with high noise requirements described in the present invention, the PCB board component is fixedly installed in the inner cavity of the motor assembly.

[0019] As a preferred solution of the actuator with high noise requirement described in the present invention, the motor lower shell and the motor upper cover are respectively fixedly installed on both sides of the motor stator.

[0020] Compared with the prior art, the technical solution of the present invention has at least one or more of the following beneficial effects:

[0021] The actuator of the present invention adds an assembly system, namely, a motor assembly, which separates the motor stator, rotor and second gear set into independent systems. The motor provides torque to the rotor through the controller and the PCB board assembly, and the rotor outputs the torque to the second duplex gear. After the reduction transmission of the second duplex gear and the third duplex gear, the third duplex gear outputs the torque to the outside of the motor assembly. This design improves the stability of the overall structural system of the actuator.

[0022] The first gear set and the second gear set are provided to divide the reduction gear into two system modules, thereby improving the stability of the gear output of the overall actuator, which can well solve the noise problem caused by poor stability in the prior art and improve the reliability and practicality of the actuator.

[0023] The positioning column, the first positioning surface and the second positioning surface are arranged so that the motor stator is firmly fixed in the positioning groove, which can improve the stability of the motor assembly and reduce the noise of the motor assembly.

[0024] The addition of a motor lower shell and a motor upper cover improves the dimensional stability of the motor lower shell and the motor upper cover, reduces the difficulty of controlling the motor lower shell and the motor upper cover, and improves the assembly accuracy of the actuator.

[0025] A cantilever beam and a cantilever beam pressure column are arranged between the motor assembly and the housing assembly. The cantilever beam is pressed by the cantilever beam pressure column to prevent the motor assembly from moving along the Z-axis direction, so that the motor assembly is stably accommodated in the accommodating cavity.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 is a three-dimensional structural schematic diagram of the motor assembly of the present invention from one viewing angle;

[0029] Figure 2 is an exploded structural schematic diagram of the motor assembly of the present invention;

[0030] Figure 3 is a three-dimensional structural schematic diagram of the motor assembly of the present invention from another viewing angle;

[0031] Figure 4It is a schematic diagram of an exploded structure of the housing assembly of the present invention;

[0032] Figure 5 is another exploded structural schematic diagram of the housing assembly of the present invention;

[0033] Figure 6 is a schematic diagram of the three-dimensional structure of the motor stator according to the present invention from one viewing angle;

[0034] Figure 7 is a schematic diagram of the three-dimensional structure of the motor stator of the present invention from another perspective;

[0035] Figure 8 is a schematic diagram of the three-dimensional structure of the bottom shell of the present invention from one viewing angle;

[0036] Fig. 9 is a schematic diagram of the three-dimensional structure of the bottom shell of the present invention from another viewing angle;

[0037] Fig.10 It is a schematic diagram of the three-dimensional structure of the lower shell of the motor according to the present invention;

[0038] Fig.11 It is a schematic diagram of the three-dimensional structure of the motor upper cover of the present invention;

[0039] Fig.12 It is a three-dimensional structural schematic diagram of the top cover of the present invention.

[0040] Among them, 1-housing assembly, 2-motor assembly, 3-PCB board assembly, 11-bottom shell, 111-motor slot, 112-motor positioning hole, 113-first limiting surface, 114-second limiting surface, 115-bottom shell shaft hole, 12-first gear set, 121-fourth double gear, 122-output shaft gear, 123-second gear shaft, 13-top cover, 131-cantilever beam pressure column, 132-top cover shaft hole, 14-accommodating cavity, 16-output hole, 17-signal access port, 18-buckle structure, 19-screw structure, 21-motor lower shell, 211-first A rotor shaft hole, 212-lower shell mounting column, 22-motor stator, 221-positioning column, 222-first positioning surface, 223-second positioning surface, 224-first gear shaft hole, 225-mounting hole, 23-rotor, 231-driving gear, 24-second gear set, 241-second double gear, 242-third double gear, 243-first gear shaft, 244-rotor shaft, 25-motor upper cover, 251-cantilever beam, 252-second gear shaft hole, 253-second rotor shaft hole, 254-upper cover fixing column, 26-motor, 31-access end. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "top", "bottom", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, unless otherwise clearly specified and limited, the terms "provided with", "equipped with", "connected", "installed with", "set", "opened", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

[0045] Please refer to Figure 1-12 ,like Figure 1-12 As shown, the present invention provides an actuator with high noise requirements, which includes a housing assembly 1, a motor assembly 2 and a PCB board assembly 3;

[0046] The housing assembly 1 at least includes a bottom housing 11, a first gear set 12 and a top cover 13. The bottom housing 11 and the top cover 13 form a receiving chamber 14. The first gear set 12 includes at least one gear. The gears of the first gear set 12 are rotatably mounted in the receiving chamber 14. One of the gears in the first gear set 12 is an output shaft gear 122. The output shaft of the output shaft gear 122 extends out of the housing assembly 1.

[0047] The motor assembly 2 is fixedly installed in the accommodating cavity 14, and the motor assembly 2 includes a motor lower shell 21, a motor stator 22, a rotor 23, a second gear set 24 and a motor upper cover 25; the motor lower shell 21 and the motor upper cover 25 form an inner cavity, the motor stator 22 is fixedly installed in the inner cavity, the second gear set 24 includes at least one gear, the rotor 23 and the second gear set 24 are rotatably installed in the inner cavity, the driving gear of the rotor is meshed with the second gear set 24, and the second gear set 24 is meshed with the first gear set 12;

[0048] The PCB board assembly 3 is fixedly installed in the inner cavity or the accommodating cavity 14 , and the motor stator 22 is electrically connected to the PCB board assembly 3 .

[0049] The first gear set and the second gear set are provided to divide the reduction gear into two system modules, thereby improving the stability of the gear output of the overall actuator, which can well solve the noise problem caused by poor stability in the prior art and improve the reliability and practicality of the actuator.

[0050] The actuator adds an assembly system, namely the motor assembly, which separates the motor stator, rotor and second gear set into independent systems. The motor provides torque to the rotor through the controller and PCB board assembly, and the rotor outputs the torque to the second duplex gear. After the reduction transmission of the second duplex gear and the third duplex gear, the third duplex gear outputs the torque to the outside of the motor assembly. This design improves the stability of the overall structural system of the actuator.

[0051] The addition of a motor lower shell and a motor upper cover improves the dimensional stability of the motor lower shell and the motor upper cover, reduces the difficulty of controlling the motor lower shell and the motor upper cover, and improves the assembly accuracy of the actuator.

[0052] In the example, the motor stator 22 and the rotor 23 form a motor 26 .

[0053] In a preferred embodiment, Figure 2 and Figure 6-9 As shown, the motor assembly 2 is provided with a positioning column 221, and the bottom shell 11 is provided with a motor positioning hole 112, and the positioning column 221 is accommodated in the motor positioning hole 112. In the example, the motor stator 22 is provided with a positioning column 221, and the bottom shell 11 is provided with a motor positioning hole 112, and the positioning column 221 is interference-fitted in the motor positioning hole 112.

[0054] Further preferably, the motor assembly 2 is further provided with a first positioning surface 222 and a second positioning surface 223, and the bottom shell 11 is provided with a first limiting surface 113 and a second limiting surface 114. When the motor assembly 2 is fixedly mounted on the bottom shell 11, the first positioning surface 222 abuts against the first limiting surface 113, and the second positioning surface 223 abuts against the second limiting surface 114. In the example, the first positioning surface 222 is installed with interference fit with the first limiting surface 113, and the second positioning surface 223 is installed with interference fit with the second limiting surface 114, so that the motor assembly 2 is fixedly mounted on the bottom shell 11.

[0055] In the example, a motor slot 111 is provided on the bottom shell 11, the first limiting surface 113 and the second limiting surface 114 are the side walls of the motor slot 111, the motor positioning hole 112 is connected to the motor slot 111, and the motor assembly 2 is interference fit in the motor slot 111 to fix it to the bottom shell 11.

[0056] In the example, the positioning column 221 is used as the main positioning column, the positioning column 221 is installed with interference fit with the motor positioning hole 112, the first limiting surface 113 and the second limiting surface 114 are used for directional positioning, and are respectively installed with interference fit with the first limiting surface 113 and the second limiting surface 114 on the bottom shell 11. The motor assembly is fixed in the positioning groove, especially in the motor stator fixed positioning groove, and the positioning column, the first positioning surface, and the second positioning surface are arranged so that the motor stator is firmly fixed in the positioning groove, which can improve the stability of the motor assembly and reduce the noise of the motor assembly.

[0057] In the example, the shape of the motor slot 111 is consistent with the shape formed by the motor lower shell 21 and the motor stator 22 in the motor assembly 2 .

[0058] In a preferred embodiment, Figure 1-2 As shown, the PCB board assembly 3 is fixedly installed in the inner cavity. In the example, the PCB board assembly 3 is fixedly installed on the motor stator 22. In the example, the PCB board assembly 3 is located between the motor stator 22 and the motor upper cover 25.

[0059] In a preferred embodiment, Figure 3 and Fig.12 As shown, a plurality of cantilever beams 251 are provided on the motor cover 25, and a plurality of cantilever beam pressure columns 131 are provided in the top cover 13, and the cantilever beams 251 conflict with the cantilever beam pressure columns 131. Preferably, at least three cantilever beams 251 are provided, and the cantilever beams 251 are not on the same straight line. In the example, three cantilever beams 251 are provided, and the three cantilever beams 251 are not on the same straight line. Of course, more cantilever beams can be provided, and the present patent is not limited to this. A cantilever beam and a cantilever beam pressure column are provided, and the cantilever beam is pressed by the cantilever beam pressure column to prevent the motor assembly from moving along the Z-axis direction, so that the motor assembly is stably accommodated in the accommodating cavity.

[0060] In the example, Figure 2As shown, the second gear set 24 includes a second double gear 241 and a third double gear 242; the first gear set 12 includes a fourth double gear 121 and an output shaft gear 122. Specifically, a driving gear 231 is provided on the rotor 23, the driving gear 231 is meshed with the large gear of the second double gear 241, the small gear of the second double gear 241 is meshed with the large gear of the third double gear 242, the small gear of the third double gear 242 is meshed with the large gear of the fourth double gear 121 on the first gear set, and the small gear of the fourth double gear 121 is meshed with the output shaft gear 122.

[0061] During use, the controller directly controls the motor assembly through the connector and the PCB board assembly to reduce the speed of the motor. The rotor 23 of the motor inputs torque. After the driving gear 231 of the rotor 23 rotates, it drives the large gear of the second double gear 241, the small gear of the second double gear 241, the large gear of the third double gear 242 and the small gear of the third double gear 242 on the second gear set 24 in turn for reduction transmission. The small gear of the third double gear 242 outputs torque to the first gear set in the housing assembly, and then passes through the large gear of the fourth double gear 121, the small gear of the fourth double gear 121 and the output shaft gear 122 in turn for reduction transmission. Finally, the output shaft of the output shaft gear 122 outputs torque.

[0062] In a specific embodiment, Figure 2 , Figure 6-7 and Figure 10-11 As shown, the gears of the second gear set 24 can be rotatably sleeved on the corresponding first gear shaft 243, one end of the first gear shaft 243 is press-fitted on the motor stator 22, and the other end of the first gear shaft 243 is press-fitted on the motor cover 25.

[0063] In the example, the motor stator 22 is provided with a plurality of first gear shaft holes 224 that match each first gear shaft 243 one by one, the number of the first gear shaft holes 224 matches the number of gears of the second gear set 24, and one end of each first gear shaft 243 is press-fitted into the corresponding first gear shaft hole 224 by interference fit, so that one end of each first gear shaft is fixed to the motor stator. The motor upper cover 25 is provided with a plurality of second gear shaft holes 252 that match each first gear shaft 243 one by one, the number of the second gear shaft holes 252 matches the number of gears of the second gear set 24, and the other end of each first gear shaft 243 is press-fitted into the corresponding second gear shaft hole 252 by interference fit, so that the other end of each first gear shaft is fixed to the motor upper cover. Here, "several" refers to one or more.

[0064] In a specific embodiment, Figure 2 , Figure 6-7 and Figure 10-11As shown, a through rotor cavity is provided on the motor stator 22, and the rotor 23 can be rotatably sleeved on the rotor shaft 244 and accommodated in the rotor cavity. In the example, one end of the rotor shaft 244 is fixedly mounted on the motor lower shell 21, and the other end of the rotor shaft 244 is fixedly mounted on the motor upper cover 25. Specifically, a first rotor shaft hole 211 is provided on the motor lower shell 21, and one end of the rotor shaft 244 is press-fitted into the first rotor shaft hole 211; a second rotor shaft hole 253 is provided on the motor upper cover 25, and the other end of the rotor shaft 244 is press-fitted into the second rotor shaft hole 253 through the PCB board assembly 3. In the example, the driving gear 231 of the rotor 23 passes through the PCB board assembly 3 and meshes with the second gear set 24.

[0065] In a specific embodiment, Figure 6-7 and Figure 10-11 As shown, the motor lower shell 21 and the motor upper cover 25 are fixedly installed on both sides of the motor stator 22. In the example, a plurality of lower shell mounting columns 212 are provided on the motor lower shell 21, and a first mounting hole corresponding to the lower shell mounting column 212 is opened on the motor stator 22, and each lower shell mounting column 212 is respectively pressed into the corresponding first mounting hole by interference fit. In the example, a plurality of upper cover fixing columns 254 are provided on the motor upper cover 25, and a second mounting hole corresponding to the upper cover fixing column 254 is opened on the motor stator 22, and each upper cover fixing column 254 is respectively pressed into the corresponding second mounting hole by interference fit. In the example, the first mounting hole and the second mounting hole correspond one by one, and each first mounting hole and the corresponding second mounting hole are a through mounting hole 225.

[0066] In a specific embodiment, Figure 4-5 , Figure 8-9 and Fig.12 As shown, the first gear set 12 includes a fourth double gear 121 and an output shaft gear 122 , and both the fourth double gear 121 and the output shaft gear 122 are rotatably mounted in the accommodating cavity 14 .

[0067] The fourth double gear 121 is sleeved on the second gear shaft 123, one end of the second gear shaft 123 is fixedly installed in the bottom shell 11, and the other end of the second gear shaft 123 is fixedly installed on the top cover 13. In the example, the bottom shell 11 is provided with a bottom shell shaft hole 115, the top cover 13 is provided with a top cover shaft hole 132, one end of the second gear shaft 123 is press-fitted into the bottom shell shaft hole 115, and the other end of the second gear shaft 123 is press-fitted into the top cover shaft hole 132.

[0068] An output hole 16 is also provided on the bottom shell 11. The side of the output shaft gear 122 close to the top cover can be rotatably mounted on the top cover 13. The side of the output shaft gear 122 close to the bottom shell can be rotatably inserted into the output hole 16. The output shaft of the output shaft gear 122 extends into the output hole 16 or extends through the output hole 16 to the outside of the shell assembly.

[0069] like Figure 1-5 As shown, a signal access port 17 is also provided on the housing assembly 1 , and an access end 31 of the PCB assembly 3 extends into the signal access port 17 .

[0070] like Figure 4-5 As shown, the top cover 13 covers the bottom shell 11. Preferably, the top cover 13 is sealed and covers the bottom shell 11. In the example, the top cover 13 is buckled on the bottom shell 11 by the buckle structure 18 and fixed on the bottom shell 11 by the screw structure 19. The double setting facilitates quick assembly and accurate positioning, and can make the shell cover more firmly.

[0071] It should be noted that, in the absence of conflict, the above embodiments or all features in the embodiments described herein may be arbitrarily combined.

[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "yet another embodiment", "another embodiment", "other embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0073] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify and vary the above embodiments within the scope of the present invention.

Claims

1. An actuator with high noise requirements, characterized in that: It comprises a housing component (1), a motor assembly (2) and a PCB board component (3); The housing assembly (1) at least comprises a bottom housing (11), a first gear set (12) and a top cover (13); the bottom housing (11) and the top cover (13) form a receiving chamber (14); the first gear set (12) comprises at least one gear; the gear of the first gear set (12) is rotatably mounted in the receiving chamber (14); one of the gears in the first gear set (12) is an output shaft gear (122); the output shaft of the output shaft gear (122) extends out of the housing assembly (1); The motor assembly (2) is fixedly installed in the accommodating cavity (14), and the motor assembly (2) comprises a motor lower shell (21), a motor stator (22), a rotor (23), a second gear set (24) and a motor upper cover (25); the motor lower shell (21) and the motor upper cover (25) form an inner cavity, the motor stator (22) is fixedly installed in the inner cavity, the second gear set (24) comprises at least one gear, the rotor (23) and the second gear set (24) are rotatably installed in the inner cavity, the driving gear (231) of the rotor (23) is meshed with the second gear set (24), and the second gear set (24) is meshed with the first gear set (12); The PCB board assembly (3) is fixedly installed in the inner cavity or the accommodating cavity (14), and the motor stator (22) is electrically connected to the PCB board assembly (3).

2. The actuator with high noise requirements according to claim 1, characterized in that: The motor assembly (2) is provided with a positioning column (221), the bottom shell (11) is provided with a motor positioning hole (112), and the positioning column (221) is accommodated in the motor positioning hole (112).

3. The actuator with high noise requirements according to claim 1, characterized in that: The positioning column (221) is press-fitted into the motor positioning hole (112).

4. The actuator with high noise requirements according to any one of claims 1 to 3, characterized in that: The motor assembly (2) is also provided with a first positioning surface (222) and a second positioning surface (223), and the bottom shell (11) is provided with a first limiting surface (113) and a second limiting surface (114); when the motor assembly (2) is fixedly mounted on the bottom shell (11), the first positioning surface (222) abuts against the first limiting surface (113), and the second positioning surface (223) abuts against the second limiting surface (114).

5. The actuator with high noise requirements according to claim 4, characterized in that: The first positioning surface (222) is installed in an interference fit with the first limiting surface (113), and the second positioning surface (223) is installed in an interference fit with the second limiting surface (114).

6. The actuator with high noise requirements according to claim 1, characterized in that: The second gear set (24) includes a second double gear (241) and a third double gear (242), and the first gear set (12) includes a fourth double gear (121) and an output shaft gear (122); The rotor (23) is provided with a driving gear (231), the driving gear (231) is meshed with the large gear of the second duplex gear (241), the small gear of the second duplex gear (241) is meshed with the large gear of the third duplex gear (242), the small gear of the third duplex gear (242) is meshed with the large gear of the fourth duplex gear (121) on the first gear set, and the small gear of the fourth duplex gear (121) is meshed with the output shaft gear (122).

7. The actuator with high noise requirements according to claim 1, characterized in that: A plurality of cantilever beams (251) are arranged on the motor upper cover (25), a plurality of cantilever beam pressure columns (131) are arranged in the top cover (13), and the cantilever beams (251) are in conflict with the cantilever beam pressure columns (131).

8. The actuator with high noise requirements according to claim 7, characterized in that: At least three cantilever beams (251) are provided, and the cantilever beams (251) are not on the same straight line.

9. The actuator with high noise requirements according to claim 1, characterized in that: Each gear of the second gear set (24) can be rotatably sleeved on the corresponding first gear shaft (243), one end of the first gear shaft (243) is interference fit on the motor stator (22), and the other end of the gear of the first gear shaft (243) is interference fit on the motor upper cover (25).

10. The actuator with high noise requirements according to claim 1, characterized in that: The PCB board assembly (3) is fixedly installed in the inner cavity of the motor assembly (2); and / or The motor lower shell (21) and the motor upper cover (25) are respectively fixedly mounted on both sides of the motor stator (22).

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