Noise reduction steering engine and electronic equipment

Abstract

The embodiment of the utility model relates to the technical field of steering engines, and particularly discloses a noise reduction steering engine and electronic equipment, the noise reduction steering engine comprises a shell, a driving mechanism, an angle detection mechanism, a circuit board and a noise reduction assembly, the shell is provided with an accommodating cavity and a through hole, and the accommodating cavity is communicated with the outside through the through hole; the driving mechanism is arranged in the containing cavity, and an output shaft of the driving mechanism extends out of the shell from the through hole; the angle detection mechanism is arranged in the containing cavity, and the angle detection mechanism is used for detecting the rotation angle of the output shaft; the circuit board is arranged in the accommodating cavity, and the circuit board is connected with the angle detection mechanism and the driving mechanism; the noise reduction assembly is located in the containing cavity. By means of the mode, the noise reduction assembly can be used for absorbing noise generated in the internal working state of the noise reduction steering engine, and therefore the noise influence of the noise reduction steering engine on the external environment is reduced.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of steering gears, and in particular to a noise-reducing steering gear and electronic equipment. Background Art

[0002] As a position (angle) servo drive, a servo is suitable for control systems that require continuous and maintained angle changes. It consists of a housing, motor, reduction gear set, sensor, and control circuitry, forming an automatic control device. Its operating principle is that the control circuit receives sensor signals and, after applying complex algorithms to them, controls the motor's speed and direction, achieving the desired angle. Servos are used in a variety of applications, including marine, aerospace, drones, industrial automation, and electronic toys. They are key components for achieving flexible movement and precise control of equipment.

[0003] In the process of realizing the present invention, the inventor of the present invention found that: at present, the motor inside the servo, as well as the components such as gears used for transmission, will generate relatively large noises when the motor itself is in working state, and the meshing and collision between the gears of the reduction gear set will also generate relatively large noises when the motor is in working state, as well as the multiple components inside the servo. Utility Model Content

[0004] The main technical problem solved by the embodiments of the utility model is to provide a noise reduction servo and electronic equipment, which can effectively reduce the noise generated by the noise reduction servo during working engineering.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a noise reduction servo, including: a shell, provided with a accommodating chamber and a through hole, the through hole connecting the accommodating chamber with the outside world; a driving mechanism, arranged in the accommodating chamber, and the output shaft of the driving mechanism extends out of the shell from the through hole; an angle detection mechanism, arranged in the accommodating chamber, and the angle detection mechanism is used to detect the rotation angle of the output shaft; a circuit board, arranged in the accommodating chamber, and the circuit board is connected to the angle detection mechanism and the driving mechanism; a noise reduction component, located in the accommodating chamber.

[0006] Optionally, the shell includes an inner side wall, an inner top wall and an inner bottom wall, the noise reduction component includes top noise reduction cotton and side noise reduction cotton, the top noise reduction cotton is arranged on the inner top wall, the side noise reduction cotton is arranged on the inner side wall, and the circuit board is arranged on the inner bottom wall; the through hole is located on the inner top wall, and the top noise reduction cotton is also provided with an avoidance hole, and the output shaft of the driving mechanism passes through the avoidance hole and the through hole in sequence and then extends out of the shell.

[0007] Optionally, the number of the inner side wall and the number of the side noise reduction cottons are both four, and one side noise reduction cotton is arranged on one inner side wall.

[0008] Optionally, the inner wall of the shell is provided with a groove, and the side noise reduction cotton is located in the groove; the noise reduction servo also includes a fixing component, which is provided on the inner wall of the shell, and the fixing component abuts against the surface of the side noise reduction cotton away from the bottom of the groove.

[0009] Optionally, the fixing assembly includes a first abutment and a bolt, the inner side wall of the shell is provided with a screw hole, the screw hole is adjacent to the groove, the first abutment is provided with a connecting hole, the bolt passes through the connecting hole and is screwed into the screw hole to fix the first abutment to the inner side wall of the shell, and the other end of the first abutment abuts the surface of the side noise reduction cotton away from the bottom of the groove.

[0010] Optionally, a mounting hole is provided on the inner side wall of the shell; the fixing assembly includes a mounting member and a second abutment member, the mounting member and the second abutment member are vertically connected, the mounting member is interference-fitted into the mounting hole, and the second abutment member abuts the surface of the side noise reduction cotton away from the bottom of the groove.

[0011] Optionally, the noise reduction servo further includes heat-conducting glue, and the heat-conducting glue is located between the inner bottom wall and the circuit board.

[0012] Optionally, a plurality of heat dissipation fins are provided on the bottom outer wall of the shell.

[0013] Optionally, the shell includes an upper shell, a lower shell and a sealing gasket, the upper shell and the lower shell are detachably fixed, the upper shell and the lower shell jointly enclose the accommodating cavity, and the sealing gasket is arranged at the joint between the upper shell and the lower shell.

[0014] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide an electronic device including the above noise reduction servo.

[0015] The beneficial effects of the embodiments of the present invention are as follows: Different from the prior art, the embodiments of the present invention provide a noise reduction servo, comprising: a housing, a drive mechanism, an angle detection mechanism, and a circuit board; wherein the housing is provided with a receiving cavity and a through hole, the through hole connecting the receiving cavity to the outside; the drive mechanism is disposed in the receiving cavity, the output shaft of the drive mechanism extending out of the housing through the through hole to facilitate connection of the drive shaft to an external device; the angle detection mechanism is disposed in the receiving cavity, the angle detection mechanism is configured to detect the rotation angle of the output shaft and generate corresponding detection data; the circuit board is disposed in the receiving cavity, the circuit board is connected to the angle detection mechanism and the drive mechanism, and the circuit board can receive the detection data generated by the angle detection mechanism and control the movement of the drive mechanism based on the detection data, thereby meeting the operating requirements of the noise reduction servo in the current state. Through the above structure, the noise reduction component is configured so that the noise generated by the operation of the drive component inside the noise reduction servo is absorbed and isolated by the noise reduction component, thereby significantly reducing the noise released into the external environment by the noise reduction servo in the operating state, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments of the present invention. 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 the drawings without paying any creative work.

[0017] Figure 1 This is an exploded schematic diagram of a noise reduction servo provided by an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the assembly of a noise reduction servo provided by an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional schematic diagram of a noise reduction servo provided by an embodiment of the present utility model;

[0020] Figure 4 It is a cross-sectional schematic diagram of a housing provided by an embodiment of the present utility model;

[0021] Figure 5 It is a three-dimensional schematic diagram of a fixing assembly provided by an embodiment of the present utility model;

[0022] Reference numerals:

[0023] 1000, noise reduction servo;

[0024] 1. Housing; 11. Accommodating cavity; 12. Through hole; 13. Inner side wall; 131. Groove; 132. Screw hole; 133. Mounting hole; 14. Inner top wall; 15. Inner bottom wall; 1a. Upper housing; 1b. Lower housing; 16. Sealing gasket; 17. Heat sink;

[0025] 2. Driving mechanism;

[0026] 3. Angle detection mechanism;

[0027] 4. Circuit board;

[0028] 5. Noise reduction component; 51. Top noise reduction cotton; 511. Avoidance hole; 52. Side noise reduction cotton; 53. Fixing component; 531. First abutment member; 5311. Connecting hole; 532. Bolt; 533. Mounting member; 534. Second abutment member. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this utility model belongs. The terms used in this specification and in the description of this utility model are only for the purpose of describing specific embodiments and are not intended to limit the utility model. The term "and / or" used in this specification includes any and all combinations of one or more of the relevant listed items.

[0031] See also Figure 1 and Figure 2The noise reduction servo 1000 includes: a housing 1, a driving mechanism 2, an angle detection mechanism 3 and a circuit board 4, wherein the housing 1 is provided with a receiving cavity 11 and a through hole 12, the through hole 12 connects the receiving cavity 11 with the outside, and the through hole 12 facilitates the output shaft of the driving mechanism 2 to extend through the through hole 12; the driving mechanism 2 is provided in the receiving cavity 11, and the output shaft of the driving mechanism 2 extends out of the housing 1 from the through hole 12; the angle detection mechanism 3 is provided in the receiving cavity 11, and the angle detection mechanism 3 is used to detect the rotation angle of the output shaft and generate corresponding detection data to be fed back to an external device or the circuit board 4; the circuit board 4 is provided in the receiving cavity 11, and the circuit board 4 and the angle detection mechanism 3 are connected. Connected to the drive mechanism 2, the circuit board 4 is used to control the operation of the angle detection mechanism 3 and the drive mechanism 2, for example, controlling the detection duration and detection frequency of the angle detection mechanism 3, and controlling the output power and operating time of the drive mechanism 2. Furthermore, the circuit board 4 can perform algorithmic processing based on detection signals transmitted by an external device or directly fed back by the angle detection mechanism 3, thereby forming an appropriate control program to control the drive mechanism 2 so that the noise reduction servo 1000 meets current operating requirements. The noise reduction component 5 is located within the accommodating cavity 11 to absorb and reflect noise generated by the operating state of the drive mechanism 2 and the angle detection mechanism 3 within the noise reduction servo 1000. The addition of the noise reduction component 5 hinders the transmission of noise within the noise reduction servo 1000, thereby significantly reducing the noise received by the external environment from the noise reduction servo 1000 and optimizing the user experience of the noise reduction servo 1000.

[0032] It can be understood that the main function of the noise reduction component 5 is to absorb and reflect noise, so the noise reduction component 5 can directly wrap the driving mechanism 2 that generates noise; or the noise reduction component 5 is arranged on the inner wall of the shell 1 to absorb and reflect the noise generated by the driving mechanism 2.

[0033] In order to achieve the above-mentioned noise absorption and reflection functions, the material of the noise reduction component 5 should have porosity, reflective properties, weather resistance, etc. The specific optional materials include but are not limited to: noise reduction cotton, sound-absorbing panels, sound insulation felt, sound insulation coatings, etc. In this embodiment, preferably, the material of the noise reduction component 5 is noise reduction cotton.

[0034] In some embodiments, see Figure 3, the noise reduction component 5 is arranged on the inner wall of the shell 1. Specifically, the shell 1 includes an inner side wall 13, an inner top wall 14 and an inner bottom wall 15. The noise reduction component 5 includes a top noise reduction cotton 51 and a side noise reduction cotton 52. The top noise reduction cotton 51 is arranged on the inner top wall 14, the side noise reduction cotton 52 is arranged on the inner side wall 13, and the circuit board 4 is arranged on the inner bottom wall 15 to isolate the circuit board 4 from the top noise reduction cotton 51 and the side noise reduction cotton 52 in space to avoid the top noise reduction cotton 51 and the side noise reduction cotton 52 from interfering The through hole 12 is located on the inner top wall 14. The through hole 12 and the circuit board 4 are respectively arranged on the inner top wall 14 and the inner bottom wall 15. This effectively prolongs the path for foreign matter from the outside to enter the housing 1 and contact the circuit board 4, thereby indirectly protecting the circuit board 4. The top noise reduction cotton 51 is also provided with an avoidance hole 511. The avoidance hole 511 corresponds to the through hole 12, so that the output shaft of the drive mechanism 2 can pass through the avoidance hole 511 and the through hole 12 in sequence and then extend outside the housing 1. By respectively providing the side noise reduction cotton 52 and the top noise reduction cotton on the inner side wall 13 and the inner top wall 14, the noise generated inside the noise reduction servo 1000 is absorbed and reflected, thereby achieving noise reduction treatment for the noise reduction servo 1000.

[0035] It can be understood that the ways in which the top noise reduction cotton 51 is set on the inner top wall 14 include but are not limited to: gluing, clamping, binding with cable ties, etc.; the ways in which the side noise reduction cotton 52 is set on the inner wall 13 include but are not limited to: gluing, clamping, binding with cable ties, etc.; the setting methods of the top noise reduction cotton 51 and the side noise reduction cotton 52 can be combined in any way to form a variety of setting methods to meet the different setting methods required by the noise reduction components 5 in different areas.

[0036] It should be noted that there are four inner walls 13 and four side noise reduction cottons 52. One side noise reduction cotton 52 is arranged on an inner wall 13, and the four side noise reduction cottons 52 correspond to the four inner walls 13 respectively, thereby forming a large range of absorption and reflection of the internal noise of the shell 1, further ensuring the noise reduction effect of the noise reduction component 5 on the noise reduction servo 1000.

[0037] In some embodiments, see Figure 3 and Figure 4The inner side wall 13 of the shell 1 is provided with a groove 131, and the side noise reduction cotton 52 is located in the groove 131. The shape of the groove 131 is consistent with the shape of the side noise reduction cotton 52 to ensure that the groove 131 has a limiting effect on the side noise reduction cotton 52; the noise reduction servo 1000 also includes a fixing component 53, which is provided on the inner wall of the shell 1, and the fixing component 53 abuts against the surface of the side noise reduction cotton 52 away from the bottom of the groove 131 to form a limit for the side noise reduction cotton 52, thereby preventing the side noise reduction cotton 52 from unexpected displacement in the groove 131. The side noise reduction cotton 52 is fixed in the groove 131 by the fixing component 53. This structure allows the side noise reduction cotton 52 to be firmly accommodated in the groove 131, avoiding falling off due to factors such as shaking of the noise reduction servo 1000 in working state and impact of external force; and the method of fixing the side noise reduction cotton 52 by the fixing component 53 also facilitates the installation or replacement of the side noise reduction cotton 52.

[0038] It should be noted that the depth of the above-mentioned groove 131 is the same as the thickness of the side noise reduction cotton 52, so as to ensure that when the fixing component 53 fixes the side noise reduction cotton 52 in the groove 131, the fixing component 53 will not apply too much abutting force to the side noise reduction cotton 52, causing its structure to collapse, thereby affecting the noise reduction effect of the side noise reduction cotton 52.

[0039] For the above-mentioned fixing component 53, please refer to Figure 5 The fixing assembly 53 includes a first abutting member 531 and a bolt 532. The inner side wall 13 of the housing 1 is provided with a screw hole 132, which is adjacent to the groove 131 to prevent the arrangement of the screw hole 132 from affecting the placement of the side noise reduction cotton 52. The first abutting member 531 is provided with a connecting hole 5311. The bolt 532 passes through the connecting hole 5311 and is screwed into the screw hole 132, fixing one end of the first abutting member 531 to the inner side wall 13 of the housing 1. The other end of the first abutting member 531 abuts the surface of the side noise reduction cotton 52 that is away from the bottom of the groove 131. Relying on the locking effect of the bolt 532 after being screwed into the screw hole 132, a portion of the first abutting member 531 is fixed to the screw hole 132, and the other portion of the first abutting member 531 abuts a portion of the side noise reduction cotton 52. The rigidity of the first abutting member 531 is used to press and fix the side wall noise reduction cotton in the groove 131.

[0040] In other embodiments, the number of screw holes 132 in each inner side wall 13 is two, and the two screw holes 132 are respectively arranged on both sides of the groove 131. The length of the first abutment 531 is extended so that it spans the groove 131, and the first abutment 531 is provided with two connecting holes 5311. The two connecting holes 5331 correspond to the two screw holes 132, and the number of corresponding bolts 132 is also two. The two bolts 132 pass through the two connecting holes 5311 respectively and are screwed to the two screw holes 132, thereby fixing the two ends of the first abutment 531 to the inner side wall 13 of the shell 1, and the surface of the first abutment 531 close to the groove 131 abuts the surface of the side noise reduction cotton 52 facing away from the bottom of the groove 131.

[0041] It can be understood that the fixing method of the bolt 532 and the first abutment 531 requires that the bolt 532 be tightened to a certain depth in order to form a locking effect on the first abutment 531. Therefore, the fixing assembly 53 composed of the bolt 532 and the first abutment 531 is more suitable for the noise reduction servo 1000 working in a high-frequency vibration environment.

[0042] In some further embodiments, see Figure 4 and Figure 5 The inner sidewall 13 of the housing 1 is provided with a mounting hole 133. The fixing assembly 53 includes a mounting member 533 and a second abutting member 534, which are vertically connected. The mounting member 533 is inserted into the mounting hole 133 with an interference fit, and the second abutting member 534 abuts the surface of the side noise reduction cotton 52 facing away from the bottom of the groove 131. The vertically connected, integrally formed mounting member 533 and second abutting member 534 simplify the steps of securing the sidewall noise reduction cotton in the groove 131, improving the overall assembly efficiency of the noise reduction servo 1000. This makes the fixing assembly 53 consisting of the vertically connected mounting member 533 and second abutting member 534 more suitable for large-scale industrial production scenarios, thereby improving the production efficiency of the noise reduction servo 1000.

[0043] In some embodiments, the noise reduction servo 1000 further includes a thermally conductive adhesive (not shown), which is located between the inner bottom wall 15 and the circuit board 4. By utilizing the excellent thermal conductivity of the thermally conductive adhesive, the heat generated by the circuit board 4 due to long-term operation can be transferred to the inner bottom wall 15 of the shell 1 in a timely manner, thereby improving the heat dissipation efficiency of the circuit board 4 and providing a good working environment for the long-term and stable operation of the circuit board 4.

[0044] Furthermore, in order to maintain a good working environment, in some embodiments, please refer to Figure 1 、 Figure 3 and Figure 4The bottom outer wall of the housing 1 is provided with a plurality of heat dissipation fins 17. These fins 17 increase the heat dissipation area, thereby improving heat dissipation efficiency. Through the heat dissipation fins 17 provided on the bottom outer wall, the heat transferred from the circuit board 4 to the bottom of the housing 1 via the thermally conductive adhesive can be more effectively dissipated to the external environment through heat conduction and convection. Furthermore, the heat dissipation fins 17, in conjunction with the structure of the bottom wall of the housing 1, optimize the uniform distribution and effective discharge of heat transferred to the bottom of the housing 1, thereby avoiding local overheating and effectively improving the situation where the circuit board 4 consumes significantly more energy due to high temperature.

[0045] It should be noted that thermal conductive adhesive is an auxiliary heat dissipation material that has been widely used in the fields of electrical engineering, automotive electronics, etc. Its specific structure and function will not be further explained here.

[0046] For the above-mentioned housing 1, see Figure 3 and Figure 4 The housing 1 includes an upper housing 1a, a lower housing 1b, and a sealing gasket 16. The upper housing 1a and the lower housing 1b are detachably fixed to reduce the difficulty of installing the noise reduction servo 1000 and facilitate the subsequent disassembly and maintenance of the drive mechanism 2, the angle detection mechanism 3, the circuit board 4, and the noise reduction component 5. The upper housing 1a and the lower housing 1b together enclose a receiving cavity 11, and the sealing gasket 16 is provided at the joint between the upper housing 1a and the lower housing 1b. The provision of the sealing gasket 16 effectively improves the sealing performance at the connection between the upper housing 1a and the lower housing 1b, thereby preventing external liquids and other foreign matter from entering the interior of the housing 1 through the connection between the upper housing 1a and the lower housing 1b, thereby improving the waterproof performance of the housing 1.

[0047] In an embodiment of the present utility model, the noise reduction servo 1000 includes a shell 1, a driving mechanism 2, an angle detection mechanism 3, a circuit board 4 and a noise reduction component 5, wherein the shell 1 is provided with a accommodating cavity 11 and a through hole 12, the through hole 12 connects the accommodating cavity 11 with the outside world, and the through hole 12 provides a channel for the communication between the driving component and the outside world; the driving mechanism 2 is arranged in the accommodating cavity 11, and the output shaft of the driving mechanism 2 extends out of the shell 1 from the through hole 12, and the end of the output shaft can be connected to an external device to provide power to the external device connected thereto; the angle detection mechanism 3 is arranged in the accommodating cavity 11, and the angle detection mechanism 3 is used to detect the rotation angle of the output shaft, and generate corresponding detection data to feed back to the external device or the circuit board 4, and the circuit board 4 is provided Placed within the accommodating chamber 11, a circuit board 4 is connected to the angle detection mechanism 3 and the drive mechanism 2. The circuit board 4 is used to control the operation of the angle detection mechanism 3 and the drive mechanism 2, for example, controlling the detection duration and detection frequency of the angle detection mechanism 3, and controlling the output power and operating time of the drive mechanism 2. Furthermore, the circuit board 4 can perform algorithmic processing based on detection signals transmitted by an external device or directly fed back by the angle detection mechanism 3, thereby forming an appropriate control program to control the drive mechanism 2 so that the noise reduction servo 1000 meets current operating requirements. A noise reduction component 5 is located within the accommodating chamber 11 to absorb and reflect noise generated by the drive mechanism 2 and the angle detection mechanism 3 within the noise reduction servo 1000 during operation. The addition of the noise reduction component 5 hinders the transmission of noise within the noise reduction servo 1000, thereby significantly reducing noise received from the external environment and optimizing the user experience of the noise reduction servo 1000.

[0048] The present invention further provides an electronic device embodiment, which includes the noise reduction servo 1000 described above. For the structure and function of the noise reduction servo 1000, please refer to the above embodiment, which will not be described in detail here.

[0049] It should be noted that the preferred embodiments of the present invention are given in the specification and drawings of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not serve as additional limitations on the content of the present invention. The purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all considered to be within the scope of the description of the present invention; further, it is obvious to those skilled in the art that improvements or changes can be made based on the above description, and all such improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A noise reduction servo, characterized in that: include: The housing is provided with a receiving cavity and a through hole, wherein the through hole connects the receiving cavity with the outside; A driving mechanism is disposed in the accommodating cavity, wherein an output shaft of the driving mechanism extends from the through hole to the outside of the housing; An angle detection mechanism is provided in the accommodating cavity, and is used to detect the rotation angle of the output shaft; a circuit board, disposed in the accommodating cavity, the circuit board being connected to the angle detection mechanism and the driving mechanism; The noise reduction component is located in the accommodating cavity.

2. The noise reduction steering gear according to claim 1, characterized in that: The shell includes an inner side wall, an inner top wall and an inner bottom wall, the noise reduction component includes a top noise reduction cotton and a side noise reduction cotton, the top noise reduction cotton is arranged on the inner top wall, the side noise reduction cotton is arranged on the inner side wall, and the circuit board is arranged on the inner bottom wall; The through hole is located on the inner top wall, and the top noise reduction cotton is also provided with an avoidance hole. The output shaft of the driving mechanism passes through the avoidance hole and the through hole in sequence and then extends out of the shell.

3. The noise reduction steering gear according to claim 2, characterized in that: The number of the inner side wall and the number of the side noise reduction cottons are both four, and one side noise reduction cotton is arranged on one inner side wall.

4. The noise reduction steering gear according to claim 3, characterized in that: The inner side wall of the shell is provided with a groove, and the side noise reduction cotton is located in the groove; The noise reduction servo further includes a fixing component, which is arranged on the inner wall of the housing and abuts against the surface of the side noise reduction cotton away from the bottom of the groove.

5. The noise reduction steering gear according to claim 4, characterized in that: The fixing assembly includes a first abutment and a bolt. The inner side wall of the shell is provided with a screw hole, and the screw hole is adjacent to the groove. The first abutment is provided with a connecting hole. The bolt passes through the connecting hole and is screwed into the screw hole. One end of the first abutment is fixed to the inner side wall of the shell, and the other end of the first abutment abuts the surface of the side noise reduction cotton away from the bottom of the groove.

6. The noise reduction steering gear according to claim 4, characterized in that: The inner side wall of the shell is provided with a mounting hole; The fixing assembly includes a mounting member and a second abutment member, the mounting member and the second abutment member are vertically connected, the mounting member is interference-fitted into the mounting hole, and the second abutment member abuts against the surface of the side noise reduction cotton away from the bottom of the groove.

7. The noise reduction steering gear according to claim 2, characterized in that: The noise reduction steering gear further includes heat-conducting glue, and the heat-conducting glue is located between the inner bottom wall and the circuit board.

8. The noise reduction steering gear according to claim 7, characterized in that: The bottom outer wall of the shell is provided with a plurality of heat dissipation fins.

9. The noise reduction steering gear according to any one of claims 1 to 8, characterized in that: The shell includes an upper shell, a lower shell and a sealing gasket. The upper shell and the lower shell are detachably fixed. The upper shell and the lower shell jointly enclose the accommodating cavity. The sealing gasket is arranged at the joint between the upper shell and the lower shell.

10. An electronic device, characterized in that: The invention comprises a noise reduction servo as described in any one of claims 1 to 9.

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