Micro motor with strong anti-electromagnetic interference performance

Abstract

The utility model discloses a micro motor with strong anti-electromagnetic interference performance, which comprises a shell, a shielding layer is fixedly connected inside the shell, one side of the inner side surface of the shielding layer is movably connected with an elastic sheet, and the inner side surface of the elastic sheet is fixedly connected with a connecting ring. According to the micro motor with the strong anti-electromagnetic interference performance, the shielding layer, the TVS tube, the inductor, the chip capacitor and the grounding wire are arranged, the shielding layer cuts off or weakens a space coupling channel of an interference field, transmission of electromagnetic energy is prevented, when the TVS tube is subjected to reverse transient high-energy impact, high impedance between two electrodes of the TVS tube can be converted into low impedance, and the anti-electromagnetic interference performance of the micro motor is improved. The inductor and the chip capacitor form a low-pass filter, the filtering effect on the electromagnetic interference is effectively achieved, the electromagnetic compatibility of the motor is improved, the circuit board is connected with the ground through the ground wire, accumulated charges can be released, and the service life of the motor is prolonged. Electromagnetic noise is effectively suppressed; and the anti-interference performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of micro motors, in particular to a micro motor with strong anti-electromagnetic interference performance. Background Art

[0002] Micromotors are small in size and capacity, with output power generally below a few hundred watts, and are designed for specialized applications, performance, and environmental requirements. They are often used in control systems to detect, analyze, amplify, execute, or convert electromechanical signals or energy. They can also be used to transmit mechanical loads and serve as AC or DC power sources for equipment.

[0003] After searching, Chinese patent publication (announcement) number CN217935315U discloses a micro motor with good heat dissipation effect, including a micro motor body, an output end of the micro motor body is equipped with a rotating shaft, a surface of the micro motor body is provided with a mounting groove, the inner wall of the mounting groove is slidably connected to a mounting block, the top surface of the mounting block is fixed with a heat sink, the top surface of the mounting block and the inner wall of the mounting groove are provided with screw holes, and the interior of the screw holes is inserted with a fixing bolt. The utility model can improve the heat dissipation effect of the micro motor body by providing a heat sink, thereby reducing the operating temperature of the micro motor body, thereby increasing the service life of the micro motor body. At the same time, when the heat sink is damaged and needs to be replaced, it can also be easily replaced. In addition, due to the provision of a silicone thermal pad, the heat conduction efficiency between the mounting block and the inner wall of the mounting groove is higher, thereby improving the heat dissipation effect.

[0004] Although the micromotor of the above patent is convenient for heat dissipation, when the micromotor works near an interference source, the electromagnetic field generated by the interference source will affect the micromotor, and the micromotor has poor ability to resist electromagnetic interference. After being interfered with, the micromotor is easily damaged. Therefore, it is necessary to design a micromotor with strong resistance to electromagnetic interference to solve the above problem. Utility Model Content

[0005] The main purpose of the present invention is to provide a micro motor with strong anti-electromagnetic interference performance, which can effectively solve the problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A micromotor with strong resistance to electromagnetic interference includes a shell, a shielding layer is fixedly connected to the interior of the shell, a spring is movably connected to one side of the inner side of the shielding layer, a connecting ring is fixedly connected to the inner side of the spring, a carbon brush is fixedly connected to the inner side of the connecting ring, and a commutator is fixedly connected to the inner side of the carbon brush; one end of the shell is movably connected to a back cover, one side of the inner side of the back cover is fixedly connected to a circuit board, a TVS tube is fixedly connected to the edge of the outer surface of the circuit board, an inductor is fixedly connected to the middle of the outer surface of the circuit board, chip capacitors are fixedly connected to the corners of the outer surface of the circuit board, and a ground wire is fixedly connected to the middle of the back of the circuit board.

[0008] In order to achieve the effect of facilitating heat dissipation, as a micro motor with strong anti-electromagnetic interference performance of the utility model, both sides of the upper surface of the rear cover are fixedly connected with connecting pieces, and the outer surface of the rear cover is provided with a heat dissipation groove.

[0009] In order to achieve the effect of easy rotation, as a micro motor with strong anti-electromagnetic interference performance of the utility model, a brushless rotor is provided in the middle of the inner side of the shielding layer, and a rotating shaft is fixedly connected to the inside of the brushless rotor.

[0010] In order to achieve the effect of facilitating end support, as a micro motor with strong anti-electromagnetic interference performance of the utility model, one end of the shell is fixedly connected to the end, and the middle part of the outer surface of the end is fixedly connected to the first bearing.

[0011] In order to achieve the effect of facilitating middle support, as a micro motor with strong anti-electromagnetic interference performance in the utility model, a slot is provided at the edge of the inner side surface of the shell, a first bracket is clamped inside the slot, and a second bearing is fixedly connected to the middle of the outer surface of the first bracket.

[0012] In order to achieve the effect of facilitating tail support, as a micro motor with strong anti-electromagnetic interference performance in the utility model, a second bracket is fixedly connected to the edge of the inner side of the rear cover, and a third bearing is fixedly connected to the middle of the outer surface of the second bracket.

[0013] In order to facilitate the fixing of the shell and the back cover, as a micro motor with strong anti-electromagnetic interference performance of the utility model, connection holes are opened at the four corners of the outer surfaces of the shell and the back cover, and bolts are connected to the internal threads of the connection holes.

[0014] In order to facilitate the installation of the motor, as a micro motor with strong anti-electromagnetic interference performance of the utility model, the lower surface of the shell is fixedly connected to a mounting plate, and mounting holes are opened at the corners of the upper surface of the mounting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. In the present invention, through the arrangement of the shielding layer, TVS tube, inductor, chip capacitor and grounding wire, the shielding layer cuts off or weakens the spatial coupling channel of the interference field, preventing the transmission of its electromagnetic energy, thereby improving the anti-electromagnetic interference performance of the micro motor. When the TVS tube is subjected to a reverse transient high-energy impact, it can convert the high impedance between its two poles into low impedance, thereby absorbing high-energy voltage surges and effectively suppressing the electromagnetic interference generated when the motor is running. The inductor and chip capacitor constitute a low-pass filter, which effectively filters the electromagnetic interference and improves the electromagnetic compatibility of the motor. The circuit board is grounded through the grounding wire, which can release the accumulated charge, effectively suppressing electromagnetic noise and improving the anti-interference performance.

[0017] 2. In the present invention, through the arrangement of the heat dissipation groove, the first bearing, the second bearing and the third bearing, the multiple heat dissipation grooves allow ventilation inside the shell, and the heat dissipation effect is enhanced, thereby extending the service life of the motor. The first bearing supports the front end of the rotating shaft, and the second bearing supports the middle part of the rotating shaft, making it smoother when rotating. The third bearing supports the tail end of the rotating shaft, making the rotating shaft more stable when rotating and not easy to deviate or shake when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of an embodiment of the utility model;

[0019] Figure 2 This is a side structural diagram of an embodiment of the present utility model;

[0020] Figure 3 This is a schematic cross-sectional plan view of an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the housing according to an embodiment of the present utility model;

[0022] Figure 5 This is a schematic diagram of the internal structure of the back cover of an embodiment of the present utility model.

[0023] In the figure: 1. Shell; 2. Shielding layer; 3. Spring clip; 4. Connecting ring; 5. Carbon brush; 6. Commutator; 7. Back cover; 8. Circuit board; 9. TVS tube; 10. Inductor; 11. Chip capacitor; 12. Grounding wire; 13. Connector; 14. Heat sink; 15. Brushless rotor; 16. Rotating shaft; 17. End; 18. First bearing; 19. Slot; 20. First bracket; 21. Second bearing; 22. Second bracket; 23. Third bearing; 24. Connecting hole; 25. Bolt; 26. Mounting plate; 27. Mounting hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Example

[0026] like Figure 1-5 As shown, a micro motor with strong anti-electromagnetic interference performance includes a shell 1, a shielding layer 2 is fixedly connected to the inside of the shell 1, a spring 3 is movably connected to one side of the inner side of the shielding layer 2, a connecting ring 4 is fixedly connected to the inner side of the spring 3, a carbon brush 5 is fixedly connected to the inner side of the connecting ring 4, and a commutator 6 is fixedly connected to the inner side of the carbon brush 5; one end of the shell 1 is movably connected to a back cover 7, one side of the inner side of the back cover 7 is fixedly connected to a circuit board 8, a TVS tube 9 is fixedly connected to the edge of the outer surface of the circuit board 8, an inductor 10 is fixedly connected to the middle of the outer surface of the circuit board 8, chip capacitors 11 are fixedly connected to the corners of the outer surface of the circuit board 8, and a grounding wire 12 is fixedly connected to the middle of the back of the circuit board 8.

[0027] When used specifically, the shielding layer 2, the spring 3, the TVS tube 9, the inductor 10, the chip capacitor 11 and the grounding wire 12 are arranged to fix the shielding layer 2 inside the housing 1, cut off or weaken the spatial coupling channel of the interference field, and prevent the transmission of its electromagnetic energy, thereby improving the anti-electromagnetic interference performance of the micro motor. The commutator 6 is mounted on one side of the outer surface of the rotating shaft 16, and a carbon brush 5 is fixed on its outer surface. The connection ring 4 and the spring 3 are arranged to make the connection between the carbon brush 5 and the commutator 6 tighter, thereby enhancing its performance and being more practical. The S tube 9, inductor 10 and chip capacitor 11 are electrically connected to the circuit board 8. When the TVS tube 9 is subjected to a reverse transient high-energy impact, it can convert the high impedance between its two poles into a low impedance, thereby absorbing high-energy voltage surges and effectively suppressing the electromagnetic interference generated during motor operation. The inductor 10 and chip capacitor 11 form a low-pass filter, which effectively filters electromagnetic interference and improves the electromagnetic compatibility of the motor. The circuit board 8 is grounded through the ground wire 12, which can release the accumulated charge, effectively suppressing electromagnetic noise and improving anti-interference performance.

[0028] In this embodiment, connecting pieces 13 are fixedly connected to both sides of the upper surface of the rear cover 7 , and heat dissipation grooves 14 are formed on the outer surface of the rear cover 7 .

[0029] During specific use, through the arrangement of the connecting pieces 13 and the heat dissipation grooves 14, there are two groups of connecting pieces 13, representing the positive and negative poles, which are convenient for connecting the external power supply wires. A plurality of heat dissipation grooves 14 are evenly arranged on the outer surface of the rear cover 7 in the form of a circular array, so that the interior of the shell 1 can be ventilated and the heat dissipation effect is enhanced, thereby extending the service life of the motor.

[0030] In this embodiment, a brushless rotor 15 is provided in the middle of the inner side surface of the shielding layer 2 , and a rotating shaft 16 is fixedly connected to the interior of the brushless rotor 15 .

[0031] During specific use, the brushless rotor 15 is fixed to the outer surface of the rotating shaft 16 through the setting of the brushless rotor 15. The brushless rotor 15 is a key component for converting electrical energy into mechanical energy. It cooperates with the rotating shaft 16 to play the role of main control drive.

[0032] In this embodiment, an end portion 17 is fixedly connected to one end of the housing 1 , and a first bearing 18 is fixedly connected to the middle portion of the outer surface of the end portion 17 .

[0033] During specific use, through the provision of the first bearing 18 , the end portion 17 protrudes from the front end of the housing 1 , which can effectively enhance the use strength of the front end of the housing 1 , and the first bearing 18 supports the front end of the rotating shaft 16 .

[0034] In this embodiment, a slot 19 is formed at the edge of the inner side of the housing 1 , a first bracket 20 is clamped inside the slot 19 , and a second bearing 21 is fixedly connected to the middle of the outer surface of the first bracket 20 .

[0035] During specific use, the first bracket 20 is clamped in the inside of the clamping slot 19 through the provision of the second bearing 21, which is convenient for connection. The middle part of the rotating shaft 16 is supported by the second bearing 21, making it smoother when rotating.

[0036] In this embodiment, a second bracket 22 is fixedly connected to the edge of the inner side surface of the rear cover 7 , and a third bearing 23 is fixedly connected to the middle portion of the outer surface of the second bracket 22 .

[0037] During specific use, through the setting of the third bearing 23, the second bracket 22 supports the third bearing 23, and the third bearing 23 supports the tail end of the rotating shaft 16, so that the rotating shaft 16 is more stable when rotating and is not easy to deviate and shake when rotating.

[0038] In this embodiment, connecting holes 24 are formed at four corners of the outer surfaces of the housing 1 and the rear cover 7 , and bolts 25 are threadedly connected to the inner surfaces of the connecting holes 24 .

[0039] During specific use, the connection holes 24 are provided to align the housing 1 with the connection holes 24 on the surface of the rear cover 7 , and then the two are fixed by bolts 25 , making assembly and disassembly easier.

[0040] In this embodiment, a mounting plate 26 is fixedly connected to the lower surface of the housing 1 , and mounting holes 27 are provided at the corners of the upper surface of the mounting plate 26 .

[0041] During specific use, through the setting of the mounting plate 26, four groups of mounting holes 27 are opened on the upper surface of the mounting plate 26, which makes it convenient to fix the housing 1 at a designated location, and the installation is more convenient and quick.

[0042] Working principle: In use, the commutator 6 is installed on one side of the outer surface of the rotating shaft 16, and a carbon brush 5 is fixed on its outer surface. The connection between the carbon brush 5 and the commutator 6 can be made tighter by the provided connecting ring 4 and the spring 3. The brushless rotor 15 is fixed on the outer surface of the rotating shaft 16. The two cooperate with each other to play the role of main control drive. The first bearing 18 supports the front end of the rotating shaft 16. The first bracket 20 is clamped in the inside of the card slot 19. The middle part of the rotating shaft 16 is supported by the second bearing 21. The housing 1 is aligned with the connecting hole 24 on the surface of the rear cover 7. The two are fixed by bolts 25. The second bracket 22 supports the third bearing 23. The third bearing 23 supports the rotating shaft. The tail end of 16 is supported, so that the shaft 16 is more stable when rotating. The shielding layer 2 is fixed inside the shell 1, cutting off or weakening the spatial coupling channel of the interference field, preventing the transmission of its electromagnetic energy, thereby improving the anti-electromagnetic interference of the micro motor. The TVS tube 9 effectively suppresses the electromagnetic interference generated when the motor is running. The inductor 10 and the chip capacitor 11 form a low-pass filter, which effectively filters the electromagnetic interference and improves the electromagnetic compatibility of the motor. The circuit board 8 is grounded through the grounding wire 12, which can release the accumulated charge, effectively suppress electromagnetic noise and improve anti-interference performance. Multiple heat dissipation slots 14 allow ventilation inside the shell 1, and the heat dissipation effect is enhanced, thereby extending the service life of the motor.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A micro motor with strong anti-electromagnetic interference performance, comprising a housing (1), characterized in that: A shielding layer (2) is fixedly connected to the interior of the housing (1); a spring sheet (3) is movably connected to one side of the inner side of the shielding layer (2); a connecting ring (4) is fixedly connected to the inner side of the connecting ring (4); a carbon brush (5) is fixedly connected to the inner side of the carbon brush (5); and a commutator (6) is fixedly connected to the inner side of the carbon brush (5); One end of the housing (1) is movably connected to a back cover (7), one side of the inner side of the back cover (7) is fixedly connected to a circuit board (8), an edge of the outer surface of the circuit board (8) is fixedly connected to a TVS tube (9), the middle of the outer surface of the circuit board (8) is fixedly connected to an inductor (10), the corners of the outer surface of the circuit board (8) are fixedly connected to chip capacitors (11), and the middle of the back of the circuit board (8) is fixedly connected to a ground wire (12).

2. A micro motor with strong electromagnetic interference resistance according to claim 1, characterized in that: Connecting pieces (13) are fixedly connected to both sides of the upper surface of the rear cover (7), and a heat dissipation groove (14) is provided on the outer surface of the rear cover (7).

3. The micro motor with strong electromagnetic interference resistance according to claim 1, characterized in that: A brushless rotor (15) is provided in the middle of the inner side surface of the shielding layer (2), and a rotating shaft (16) is fixedly connected to the interior of the brushless rotor (15).

4. The micro motor with strong electromagnetic interference resistance according to claim 1, characterized in that: One end of the housing (1) is fixedly connected to an end portion (17), and a middle portion of an outer surface of the end portion (17) is fixedly connected to a first bearing (18).

5. The micro motor with strong electromagnetic interference resistance according to claim 1, characterized in that: A slot (19) is provided at the edge of the inner side of the housing (1), a first bracket (20) is clamped inside the slot (19), and a second bearing (21) is fixedly connected to the middle of the outer surface of the first bracket (20).

6. The micro motor with strong electromagnetic interference resistance according to claim 1, characterized in that: A second bracket (22) is fixedly connected to the edge of the inner side surface of the rear cover (7), and a third bearing (23) is fixedly connected to the middle of the outer surface of the second bracket (22).

7. The micro motor with strong electromagnetic interference resistance according to claim 1, characterized in that: Connecting holes (24) are provided at four corners of the outer surfaces of the housing (1) and the rear cover (7), and bolts (25) are connected to the inner threads of the connecting holes (24).

8. The micro motor with strong electromagnetic interference resistance according to claim 1, characterized in that: A mounting plate (26) is fixedly connected to the lower surface of the housing (1), and mounting holes (27) are provided at the corners of the upper surface of the mounting plate (26).

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