Micromotor with anti-interference function

Abstract

The utility model discloses a micromotor with an anti-interference function, and belongs to the technical field of motors. The micromotor with the anti-interference function comprises a motor body, one end of the motor body is connected with an interface, a stator is arranged between the interface and the motor body, the outer wall of the stator is provided with a shielding kit, the shielding kit comprises an outer sleeve, the inner wall of the outer sleeve is provided with an anti-static coating, and the anti-static coating is arranged on the inner wall of the outer sleeve. An anti-static coating is arranged in the outer sleeve, an inner sleeve is sleeved with the anti-static coating, the interior of the inner sleeve is in threaded connection with the outer wall of the stator, the two ends of the outer sleeve are in threaded connection with a first anti-falling cover and a second anti-falling cover respectively, and the inner walls of the first anti-falling cover and the second anti-falling cover are attached to the two sides of the inner sleeve respectively; an output shaft is rotationally connected to the interior of the motor body, a fan is arranged at one end of the output shaft, and one side of the fan is flush with one side of the motor body.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a micro motor with anti-interference function. Background Technology

[0002] Micro motors refer to motors with a diameter of less than 160mm or a rated power of less than 750mW. Micro motors are commonly used in control systems or transmission mechanical loads to perform functions such as detection, analysis, amplification, execution, or conversion of electromechanical signals or energy. A search revealed a Chinese patent with authorization announcement number CN208522566U, which discloses an assembly structure for a motor housing and stator assembly, a motor housing, and a brushless motor. This assembly structure includes a motor housing and a stator assembly. The motor housing contains an annular core fixed to the inner wall of the motor housing by at least two air guide vanes. Air ducts are formed between adjacent air guide vanes. The annular core, from back to front, has a first central through-hole, a first cavity, and a second cavity. The front and rear parts of the first central through-hole of the annular core are respectively a front bearing chamber and a rear bearing chamber. The stator assembly core is fixed within the second cavity of the annular core, and the rear end of the stator assembly is located within the first cavity of the annular core. A portion of the stator assembly core is located inside the motor housing, while the other portion is located outside the motor housing. The assembly structure and brushless motor of this utility model have the advantages of reasonable structure, simple process, good heat dissipation, good insulation performance, low cost and long service life.

[0003] However, in actual use, because the stator assembly extends to the outside of the motor housing and is not properly shielded, the micro motor is prone to abnormal conditions during EMC testing, thus failing the test and reducing the yield rate of the micro motor. Utility Model Content

[0004] To address the lack of shielding protection in existing micro motors, this invention provides a micro motor with anti-interference functionality.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows:

[0006] A micro motor with anti-interference function includes a motor body, one end of which is connected to an interface. A stator is provided between the interface and the motor body. The outer wall of the stator is provided with a shielding kit. The shielding kit includes an outer sleeve, the inner wall of which is provided with an antistatic coating. An inner sleeve is fitted inside the antistatic coating. The inner sleeve is threadedly connected to the outer wall of the stator. The two ends of the outer sleeve are respectively threaded with a first anti-detachment cover and a second anti-detachment cover. The inner walls of the first anti-detachment cover and the second anti-detachment cover are respectively fitted to the two sides of the inner sleeve.

[0007] Furthermore, an output shaft is rotatably connected inside the motor body, and a fan is provided at one end of the output shaft, with one side of the fan flush with one side of the motor body.

[0008] The advantages of adopting the above-mentioned further solution are that the output shaft drives the fan to rotate, forming a forced convection airflow inside the motor body, which, combined with the housing heat dissipation structure, achieves efficient heat dissipation. The flush design of the fan and motor body reduces axial space occupation and is suitable for compact equipment installation.

[0009] Furthermore, the fan includes a circular box, one end of the output shaft is fitted with the circular box, and fan blades are installed at equal intervals on the outer wall of the circular box.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the fan's circular box guides the airflow in a spiral flow, which, together with the equidistant fan blades, enhances the heat dissipation efficiency and reduces operating noise.

[0011] Furthermore, the motor body includes a housing, and heat dissipation fins are equidistantly installed on the inner wall of the housing.

[0012] The beneficial effect of adopting the above-mentioned further solution is that heat dissipation fins are evenly distributed on the inner wall of the casing, increasing the heat dissipation area. Combined with the forced convection of the fan, it accelerates the dissipation of heat inside the motor and ensures stable operation.

[0013] Furthermore, the heat dissipation fins are wavy in shape.

[0014] The beneficial effects of adopting the above-mentioned further solution are that the heat dissipation fins adopt a wave-shaped design, which increases the surface area and turbulence effect, improves the heat exchange efficiency, and enhances the structural strength of the shell.

[0015] Furthermore, the motor body has a notch on the side near the interface, and a fixing component is provided inside the notch.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the plate of the fixing component cooperates with the motor body through the notch, and the round hole is adapted to the standard mounting hole position, ensuring installation accuracy and versatility.

[0017] Furthermore, the fixing component includes a plate with a circular hole on one side.

[0018] The beneficial effects of adopting the above-mentioned further solution are that the plate of the fixed component is electrically connected to the motor housing, and the metal insert with the round hole provides stable grounding, releases static electricity, and suppresses electromagnetic interference.

[0019] Furthermore, the outer wall of the motor body is provided with an electromagnetic wave shielding coating.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the electromagnetic wave shielding coating on the outer wall of the motor body and the internal shielding kit form a double protection, effectively blocking internal and external electromagnetic interference, making it suitable for environments with high electromagnetic compatibility requirements. Furthermore, a cage is installed on one side of the stator, and a magnetic block is installed inside the cage. A rotor is rotatably connected inside the magnetic block, and the rotor is located inside the motor body. Compared with the prior art, the beneficial effects of this utility model are:

[0021] This type of micro motor with anti-interference function can protect the stator by installing and using a shielding kit, which helps the micro motor pass EMC testing smoothly. The shielding kit adopts a composite structure consisting of an outer sleeve, an anti-static coating, and an inner sleeve. The inner sleeve is threaded to the stator to form a Faraday cage effect. Together with the first and second anti-detachment covers at both ends, it achieves full-coverage shielding, effectively isolating the electromagnetic interference inside the motor and preventing it from affecting external equipment. The first and second anti-detachment covers adopt a double-threaded self-locking structure to ensure stable connection under vibration. Attached Figure Description

[0022] Figure 1 A three-dimensional schematic diagram of a micro motor with anti-interference function provided by this utility model;

[0023] Figure 2 A schematic diagram showing the unfolded state of a micro motor with anti-interference function provided by this utility model;

[0024] Figure 3 A side view of the motor body of a micro motor with anti-interference function provided by this utility model;

[0025] Figure 4 A schematic diagram of a shielding kit for a micro motor with anti-interference function provided by this utility model;

[0026] Figure 5 An enlarged schematic diagram of a fixing component for a micro motor with anti-interference function provided by this utility model;

[0027] Figure 6 An exploded view of a micro motor with anti-interference function provided for this utility model.

[0028] In the diagram: 100, Motor body; 1001, Housing; 1002, Heat sink fins; 200, Fixing assembly; 2001, Plate; 2002, Round hole; 300, Output shaft; 400, Fan; 4001, Round box; 4002, Fan blade; 500, Interface; 600, Shielding kit; 6001, Outer sleeve; 6002, Antistatic coating; 6003, Inner sleeve; 6004, First anti-detachment cover; 6005, Second anti-detachment cover; 101, Stator; 102, Magnet; 103, Cage; 104, Rotor. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Please see Figures 1-6 This utility model provides a technical solution: a micro motor with anti-interference function, including a motor body 100, one end of which is connected to an interface 500, a stator 101 is provided between the interface 500 and the motor body 100, the outer wall of the stator 101 is provided with a shielding kit 600, the shielding kit 600 includes an outer sleeve 6001, the inner wall of the outer sleeve 6001 is provided with an antistatic coating 6002, an inner sleeve 6003 is fitted inside the antistatic coating 6002, the inside of the inner sleeve 6003 is threadedly connected to the outer wall of the stator 101, the two ends of the outer sleeve 6001 are respectively threadedly connected with a first anti-detachment cover 6004 and a second anti-detachment cover 6005, the inner walls of the first anti-detachment cover 6004 and the second anti-detachment cover 6005 are respectively connected to the two sides of the inner sleeve 6003. The shielding kit 600 is a composite structure consisting of an outer sleeve 6001, an antistatic coating 6002, and an inner sleeve 6003. The inner sleeve 6003 is threadedly connected to the stator 101 to form a Faraday cage effect. Together with the first anti-detachment cover 6004 and the second anti-detachment cover 6005 at both ends, it achieves full-coverage shielding, effectively isolating the electromagnetic interference inside the motor and preventing it from affecting external equipment. The first anti-detachment cover 6004 and the second anti-detachment cover 6005 adopt a double-threaded self-locking structure to ensure stable connection in a vibration environment. The outer wall of the motor body 100 is covered with electromagnetic wave shielding coating. The electromagnetic wave shielding coating on the outer wall of the motor body 100 and the inner shielding kit 600 form double protection, effectively blocking internal and external electromagnetic interference, and is suitable for environments with high electromagnetic compatibility requirements.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] As one embodiment of this utility model, further, an output shaft 300 is rotatably connected inside the motor body 100. A fan 400 is provided at one end of the output shaft 300, and one side of the fan 400 is flush with one side of the motor body 100. The output shaft 300 drives the fan 400 to rotate, forming a forced convection airflow inside the motor body 100. Combined with the heat dissipation structure of the housing, efficient heat dissipation is achieved. The design of the fan 400 being flush with the motor body 100 reduces the axial space occupation and is suitable for compact equipment installation. The fan 400 includes a circular box 4001, and one end of the output shaft 300 is fitted with the circular box 4001. Fan blades 4002 are equidistantly installed on the outer wall of the circular box 4001. The circular box 4001 of the fan 400 guides the airflow in a spiral flow, which, together with the equidistant fan blades 4002, enhances the heat dissipation efficiency and reduces operating noise.

[0033] As an embodiment of this utility model, the motor body 100 further includes a housing 1001, and heat dissipation fins 1002 are equidistantly installed on the inner wall of the housing 1001. The heat dissipation fins 1002 are evenly distributed on the inner wall of the housing 1001 to expand the heat dissipation area. Combined with the forced convection of the fan 400, the heat dissipation of the internal heat of the motor is accelerated, ensuring stable operation. The heat dissipation fins 1002 are wavy in shape. The wavy design of the heat dissipation fins 1002 increases the surface area and turbulence effect, improves the heat exchange efficiency, and enhances the structural strength of the housing.

[0034] As an embodiment of this utility model, the motor body 100 further includes a notch on the side near the interface 500. A fixing component 200 is provided inside the notch. The plate 2001 of the fixing component 200 engages with the motor body 100 through the notch. The round hole 2002 is adapted to the standard mounting hole position to ensure installation accuracy and versatility. The fixing component 200 includes a plate 2001. A round hole 2002 is provided on one side of the plate 2001. The plate 2001 of the fixing component 200 is electrically connected to the motor housing 1001. The metal insert of the round hole 2002 provides stable grounding, releases static electricity, and suppresses electromagnetic interference. A retainer 103 is installed on one side of the stator 101. A magnetic block 102 is installed inside the retainer 103. A rotor 104 is rotatably connected inside the magnetic block 102. The rotor 104 is located inside the motor body 100.

[0035] Specifically, the working principle of this anti-interference micro-motor is as follows: During use, the motor body 100 is precisely installed and positioned through the plate 2001 and circular hole 2002 of the fixing component 200, and a reliable grounding path is formed through conductive connection. When the motor is running, the output shaft 300 drives the circular box 4001 and fan blade 4002 of the fan 400 to rotate, forming a forced convection airflow inside the motor body 100. Combined with the three-dimensional heat dissipation structure of the wave-shaped heat dissipation fins 1002 on the inner wall of the housing 1001, heat dissipation is accelerated. At the same time, the inner sleeve 6003 of the shielding kit 600 is threadedly connected to the stator 101 to form a Faraday cage effect. The antistatic coating 6002 dissipates static electricity, and the outer sleeve 6001 and the first anti-detachment cover 6004 and the second anti-detachment cover 6005 at both ends achieve full-coverage shielding. Together with the electromagnetic wave shielding coating on the outer wall of the motor, a dual protection system is formed, effectively isolating internal electromagnetic interference and preventing external interference from intruding, ensuring stable operation of the motor in complex electromagnetic environments.

Claims

1. A micro motor with anti-interference function, characterized in that, The device includes a motor body (100), one end of which is connected to an interface (500). A stator (101) is provided between the interface (500) and the motor body (100). The outer wall of the stator (101) is provided with a shielding kit (600). The shielding kit (600) includes an outer sleeve (6001). The inner wall of the outer sleeve (6001) is provided with an antistatic coating (6002). An inner sleeve (6003) is fitted inside the antistatic coating (6002). The interior of the inner sleeve (6003) is threadedly connected to the outer wall of the stator (101). The two ends of the outer sleeve (6001) are respectively threadedly connected with a first anti-detachment cover (6004) and a second anti-detachment cover (6005). The inner walls of the first anti-detachment cover (6004) and the second anti-detachment cover (6005) are respectively attached to the two sides of the inner sleeve (6003).

2. A micro motor with anti-interference function according to claim 1, characterized in that, An output shaft (300) is rotatably connected inside the motor body (100). One end of the output shaft (300) is provided with a fan (400), and one side of the fan (400) is flush with one side of the motor body (100).

3. A micro motor with anti-interference function according to claim 2, characterized in that, The fan (400) includes a round box (4001), one end of the output shaft (300) is fitted with the round box (4001), and fan blades (4002) are installed at equal intervals on the outer wall of the round box (4001).

4. A micro motor with anti-interference function according to claim 1, characterized in that, The motor body (100) includes a housing (1001), and heat dissipation fins (1002) are equidistantly installed on the inner wall of the housing (1001).

5. A micro motor with anti-interference function according to claim 4, characterized in that, The heat dissipation fins (1002) are wavy in shape.

6. A micro motor with anti-interference function according to claim 1, characterized in that, The motor body (100) has a notch on the side near the interface (500), and a fixing component (200) is provided inside the notch.

7. A micro motor with anti-interference function according to claim 6, characterized in that, The fixing component (200) includes a plate (2001), and a circular hole (2002) is provided on one side of the plate (2001).

8. A micro motor with anti-interference function according to claim 1, characterized in that, The outer wall of the motor body (100) is coated with electromagnetic wave shielding material.

9. A micro motor with anti-interference function according to claim 1, characterized in that, A retainer (103) is installed on one side of the stator (101), and a magnetic block (102) is installed inside the retainer (103). A rotor (104) is rotatably connected inside the magnetic block (102), and the rotor (104) is located inside the motor body (100).

Images