Electric Motor

Abstract

The present invention discloses an electric motor, which includes a stator core, a plastic sealing part, a rotor module and a stator coil, wherein the stator core includes electrode teeth, and the stator cores are arranged to mesh with each other in pairs, the plastic sealing part plastic seals and fixes the stator core to form a winding frame, a rotor cavity and a gear box, and the stator core is exposed on the inner side of the rotor cavity, the rotor module includes a rotor shaft and a rotor, the rotor is connected to the rotor shaft, the rotor is arranged in the rotor cavity, the rotor shaft passes through the plastic sealing part and is exposed on one side of the gear box, and the stator coil is wound on the winding frame. According to the electric motor of the present invention, the plastic sealing part is injection molded into the winding frame, the rotor cavity and the gear box at one time, and the stator core is fixed at the corresponding position of the plastic sealing part, which simplifies the assembly process of the electric motor and improves the assembly accuracy of the electric motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an electric motor. Background Art

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It uses an energized coil to generate a rotating magnetic field and acts on the rotor to form a magneto-electrical rotation torque. In the prior art, electric motors are generally assembled from multiple parts. Users need to sequentially set the various components in the motor into the motor housing to assemble the motor. Not only is the assembly process cumbersome, but the dimensional tolerances of the various components during the assembly process may affect the overall assembly accuracy of the motor, thereby affecting the working performance of the assembled motor. In addition, there may be large performance differences between different motors due to assembly errors. Summary of the invention

[0003] The present invention aims to solve one of the technical problems existing in the prior art. To this end, the present invention proposes an electric motor, in which a stator frame and a gear box are integrally formed, and electrode teeth are fixed in the stator frame by plastic sealing, which simplifies the overall assembly process of the motor and ensures the assembly accuracy of the motor, and improves the stability and working performance of the motor after assembly.

[0004] According to an embodiment of the first aspect of the present invention, the electric motor comprises: a stator core, the stator core comprises electrode teeth, and the stator cores are arranged to mesh with each other in pairs; a plastic sealing member, the plastic sealing member is sealed on the stator core to form a shell, the outer side of the shell forms a winding frame, the inner side of the shell forms a rotor cavity, one end of the shell forms a gear box, and the electrode teeth are exposed on one side of the rotor cavity; a rotor module, the rotor module comprises a rotor and a rotor shaft, the rotor is arranged in the rotor cavity and opposite to the position of the stator core, the rotor shaft is arranged on the rotor, the rotor shaft passes through one side of the shell and is exposed on one side of the gear box; a stator coil, the stator coil is wound on the winding frame and opposite to the position of the stator core.

[0005] According to the motor of the embodiment of the present invention, there are at least the following technical effects: the plastic package is injection molded, the winding frame, the gear box and the rotor cavity are molded at one time, and the stator core is fixed at the corresponding position of the plastic package. Compared with the traditional motor, the stator core has been fixed at the corresponding position of the plastic package. When installing the motor, the user only needs to set the stator coil and the rotor module at the corresponding position, which greatly simplifies the assembly process of the motor, and the simplified assembly process effectively reduces the assembly error that may occur during the assembly of the motor, improves the overall assembly accuracy of the motor, and improves the stability and working performance of the motor after the assembly is completed. In the traditional motor, the gear box and the stator frame are mostly spliced ​​together by two parts. When the gear box and the stator frame are assembled together, it will be difficult to ensure the coaxiality between the shaft hole of the rotor cavity and the shaft hole in the middle of the gear box for the rotor shaft to pass through, and a large position deviation may occur. In this scheme, the gear box and the stator frame are integrally formed, and the two shaft holes are integrated on the partition between the gear box and the rotor cavity after the plastic package is injection molded at one time, which ensures the coaxiality between the two shaft holes.

[0006] According to some embodiments of the present invention, a side of the electrode tooth close to the rotor cavity is provided with a chamfer.

[0007] According to some embodiments of the present invention, a connecting device is further included, which includes a wiring terminal and a circuit board, one end of the wiring terminal is connected to the circuit board, and the other end is arranged on one side of the gear box and connected to the stator coil, and the connecting device is used to transmit electrical energy to the stator coil.

[0008] According to some embodiments of the present invention, the connecting device further comprises a pin header, one end of which is connected to the circuit board.

[0009] According to some embodiments of the present invention, the connecting device further includes a connector, one end of which is connected to the circuit board.

[0010] According to some embodiments of the present invention, a gear set is further included. The gear set is disposed in the gear box, and the rotor shaft outputs rotation through the gear set.

[0011] According to some embodiments of the present invention, a cover plate is further included, and the cover plate is disposed on the gear box to close the gear box.

[0012] According to some embodiments of the present invention, the gear set is disposed on the cover plate.

[0013] According to some embodiments of the present invention, a first shell is further included, and the first shell is arranged outside the plastic package.

[0014] According to some embodiments of the present invention, the first housing and the cover plate are cooperatively connected to each other.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the following description and in part will be obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a schematic structural diagram of a motor according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of the exploded structure of a motor according to an embodiment of the present invention;

[0019] Figure 3 is a cross-sectional view of a motor according to an embodiment of the present invention;

[0020] Figure 4 is a cross-sectional view of another structure of a motor according to an embodiment of the present invention;

[0021] Figure 5 is a cross-sectional view of a plastic package and a stator core in a motor according to an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the structure of a stator core in a motor according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Stator core 100, electrode teeth 110, mounting portion 120, plastic package 200, winding frame 210, rotor cavity 220, gear box 230, rotor 310, rotor shaft 320, stator coil 400, connecting device 500, terminal 510, circuit board 520, pin header 530, connector 540, second shell 550, third shell 560, gear set 600, cover plate 700, first shell 800. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and are not to be construed as limitations of the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0029] Reference below Figures 1 to 6 A motor according to an embodiment of the present invention is described.

[0030] For example, Figures 1 to 6 As shown, the motor according to the present invention includes: a stator core 100, the stator core 100 includes electrode teeth 110, and the stator cores 100 are arranged in pairs to mesh with each other; a plastic sealing member 200, the plastic sealing member 200 is sealed on the stator core 100 to form a shell, the outer side of the shell forms a winding frame 210, the inner side of the shell forms a rotor cavity 220, one end of the shell forms a gear box 230, and the electrode teeth 110 are exposed on one side of the rotor cavity 220; a rotor module, the rotor module includes a rotor 310 and a rotor shaft 320, the rotor 310 is arranged in the rotor cavity 220 and is opposite to the position of the stator core 100, the rotor shaft 320 is arranged on the rotor 310, the rotor shaft 320 passes through one side of the shell and is exposed on one side of the gear box 230; a stator coil 400, the stator coil 400 is wound on the winding frame 210 and is opposite to the position of the stator core 100.

[0031] like Figures 1 to 6As shown, after the plastic package 200 is injection molded, a shell is formed, wherein the inner side of the shell forms a rotor cavity 220, the outer side of the shell forms two winding skeletons 210, and the upper end of the shell forms a gear box 230. The stator core 100 with two pairs of electrode teeth 110 meshing with each other is plastic-sealed and fixed inside the plastic package 200, the mounting portion 120 of the stator core 100 is fixed in the plastic package 200, and one side of the electrode teeth 110 of the stator core 100 is exposed on the surface of the rotor cavity 220. The stator coil 400 is respectively wound on the two winding skeletons 210, the rotor 310 is arranged in the rotor cavity 220, and the rotor shaft 320 is connected to the rotor 310 and passes through the upper surface of the gear box 230 to be exposed.

[0032] According to the motor of the embodiment of the present invention, the plastic package 200 integrally forms the winding frame 210, the gear box 230 and the rotor cavity 220, and fixes the stator core 100 at the corresponding position of the plastic package 200. When assembling the motor, the user only needs to insert the rotor mold into the rotor cavity 220 and wind the stator coil 400 on the winding frame 210, which simplifies the assembly process of the motor. In addition, the positions of the stator core 100 and each installation position on the plastic package 200 are fixed to each other, which effectively improves the assembly accuracy of the motor and improves the stability and working performance of the motor after assembly.

[0033] In some specific embodiments of the present invention, a chamfer is provided on one side of the electrode teeth 110 close to the rotor cavity 220. Figure 3 and Figure 6 As shown, the stator cores 100 are meshed in pairs, and a chamfer is provided on the side of the electrode teeth 110 in the stator core 100 away from the mounting portion 120, and the position of the chamfer is fixed in the plastic package 200. By providing the chamfer on the electrode teeth 110, a stopper will be formed at the chamfer after the plastic package 200 is injection molded, which effectively prevents the stator core 100 from coming out of the plastic package 200 during assembly or use of the motor, and only the chamfered part of the electrode teeth 110 is blocked by the plastic package 200, and the rest of the parts are exposed on the inner side of the rotor cavity 220, so that the plastic package 200 will not block the magnetic field generated by the electrode teeth 110 too much.

[0034] In some specific embodiments of the present invention, a connecting device 500 is further included. The connecting device 500 includes a terminal 510 and a circuit board 520. One end of the terminal 510 is connected to the circuit board 520, and the other end is arranged on the side of the gear box 230 and connected to the stator coil 400. The connecting device 500 is used to transmit electrical energy to the stator coil 400. For example, Figure 2As shown, the connecting device 500 includes a terminal 510 and a circuit board 520, the terminal 510 is arranged on one side of the gear box 230, the stator coil 400 is wound around the terminal 510, and is connected to the terminal 510, and the circuit board 520 is connected to one end of the terminal 510 away from the plastic package 200. When the user wants to drive the motor to work, the stator coil 400 can be powered directly through the connecting device 500, and the rotor module can be driven to rotate after the magnetic field is generated in the stator core 100. In a traditional motor, the lead wire needs to be connected to each stator coil 400 separately to supply power, but the lead wire structure may be rubbed or damaged during installation, which may cause poor contact or disconnection between the lead wire and the stator coil 400 during use. Compared with the motor in which the lead wire is directly connected to the stator coil 400, the motor in the present invention has a more stable connection between the connecting device 500 and the stator coil 400, and the overall structure of the motor is also more stable. The terminal 510 is arranged on one side of the gear box 230 instead of on one side of the bobbin 210 , thereby reserving space for arranging other components below the connecting device 500 .

[0035] In a further embodiment of the present invention, the connecting device 500 further includes a pin header 530, one end of which is connected to the circuit board 520. Figure 2 and Figure 3 As shown, the pin row 530 is arranged in the second shell 550, and the second shell 550 is arranged on the side of the plastic package 200 with the terminal 510 and the circuit board 520. One end of the pin row 530 is connected to the circuit board 520, and the other end of the pin row 530 points to the direction away from the gear box 230 and is used to connect the power supply device. During the actual use of the motor, the output end will be connected to other devices to output the torque of the rotor. If the direction of the pin row 530 is set to point to the output end, the power supply device may interfere with the device that outputs the torque of the motor. By setting the pin row 530 in the connecting device 500, after the user connects the pin row 530 to the power supply device and powers on, the stator coil 400 will generate a rotating magnetic field to drive the rotor module to rotate, thereby improving the convenience of the motor when in use.

[0036] In a further embodiment of the present invention, the connecting device 500 further includes a connector 540, one end of which is connected to the circuit board 520. Figure 4As shown, the connector 540 is arranged in the third housing 560, and the third housing 560 is arranged on the side of the plastic package 200 where the terminal 510 and the circuit board 520 are provided. One end of the connector 540 is connected to the circuit board 520, and the other end of the connector 540 points to the direction away from the gear box 230 and is used to connect the power supply device. During the actual use of the motor, the output end will be connected to other devices to output the torque of the rotor. If the orientation of the connector 540 is set in the direction pointing to the output end, the power supply device may interfere with the device that outputs the torque of the motor. By arranging the connector 540 in the connecting device 500, after the user connects the connector 540 to the power supply device and powers on, the stator coil 400 will generate a rotating magnetic field to drive the rotor module to rotate, which improves the convenience of the motor when in use, and the connection between the connector 540 and the power supply device is relatively stable. During the operation of the motor, the connection between the connector 540 and the power supply device will not be easily loosened, which improves the stability of the motor when in operation.

[0037] In some specific embodiments of the present invention, a gear set 600 is further included. The gear set 600 is disposed in the gear box 230, and the rotor shaft 320 outputs the rotation through the gear set 600. Figure 2 and Figure 3 As shown, a blind hole for setting a gear shaft is provided in the gear box 230, and the gear shaft is arranged on the blind hole. The gear is arranged in the gear box 230 through the gear shaft to form a gear set 600. The gear set 600 also includes an output shaft, and the output shaft extends to a side away from the rotor cavity 220. One end of the rotor shaft 320 passing through the gear box 230 is tooth-shaped and meshes with the gear in the gear set 600. The gear set 600 can transmit the rotation of the rotor shaft 320 to the output shaft. The user can freely select the gear set 600 set in the motor according to the actual use of the motor to achieve the purpose of changing the output shaft speed or output direction.

[0038] In a further embodiment of the present invention, a cover plate 700 is further included. The cover plate 700 is disposed on the gear box 230 to cover the gear box 230. Figure 1 and Figure 2 As shown, the cover plate 700 is disposed above the gear box 230 and covers the gear set 600. By disposing the cover plate 700 in the motor, the gear set 600 can be protected to prevent foreign matter from entering the gear box 230 during the operation of the motor and damaging the gears in the gear set 600 or the rotor shaft 320.

[0039] In a further embodiment of the present invention, the gear set 600 is disposed on the cover plate 700. For example, Figure 2 and Figure 3As shown, a plurality of gear shafts are provided on one side of the cover plate 700 facing the gear box 230, and the gears are arranged on the cover plate 700 through the gear shafts to form a gear set 600. The gear box 230 is provided with blind holes corresponding to the positions of the gear shafts on the cover plate 700 for installing the gear set 600. When the user covers the cover plate 700 on the gear box 230, the gear shafts are aligned with the positions of the blind holes in the gear box 230, and the installation of the gear set 600 is completed; when the user takes out the cover plate 700 upwards, the gear set 600 can be taken out of the gear box 230. By arranging the gear set 600 on the cover plate 700, the convenience of motor maintenance is improved. Specifically, the operating space available in the gear box 230 is small. When the gear set 600 is set in the gear box 230, if the gear set 600 fails, it will be difficult to repair the failed part of the gear set 600; when the gear set 600 is set on the cover plate 700, if the gear set 600 fails, the user only needs to remove the cover plate 700 to take the gear set 600 out of the gear box 230 and repair the failed part.

[0040] In a further embodiment of the present invention, a first housing 800 is further included, and the first housing 800 is disposed outside the plastic package 200. Figure 2 As shown, the first housing 800 is disposed on the first housing 800 of the plastic package 200, and covers the winding frame 210 and the rotor cavity 220. By arranging the first housing 800 in the motor, the plastic package 200 as a whole can be protected, and the first housing 800 covers the winding frame 210 and the rotor cavity 220, which can prevent the rotor 310 from falling out of the rotor cavity 220 or the stator coil 400 from being loosened from the winding frame 210 during operation of the motor.

[0041] In a further embodiment of the present invention, the first housing 800 and the cover plate 700 are connected to each other in a cooperative manner. Figure 2As shown, the cover plate 700 is evenly provided with an extension extending outward around the periphery, the top of the first shell 800 is provided with a notch that matches the size and position of the extension, and the side of the plastic seal 200 is also provided with a protrusion extending outward, and matches with the notch on one side of the first shell 800. When assembling the motor, the user first sets the rotor module and the stator coil 400 on the plastic seal 200, and then aligns the protrusion of the plastic seal 200 with the notch on the first shell 800, installs it into the first shell 800, and finally aligns the extension around the cover plate 700 with the notch on the top of the first shell 800, and covers the cover plate 700 above the shell. Through the above arrangement, the plastic seal 200, the first shell 800 and the cover plate 700 cooperate with each other, which can effectively prevent the plastic seal 200 and the first shell 800 from rotating relative to each other during the operation of the motor, or the cover plate 700 and the first shell 800 from rotating relative to each other, further improving the stability of the motor structure.

[0042] According to the following Figures 1 to 6 The motor according to the embodiment of the present invention is described in detail with a specific embodiment. It is worth noting that the following description is only an exemplary description and is not a specific limitation of the present invention.

[0043] like Figures 1 to 6As shown, the motor includes a stator core 100, a plastic package 200, a rotor module, a stator coil 400, a connecting device 500, a gear set 600, a first shell 800 and a cover plate 700, wherein the stator core 100 includes a mounting portion 120 and an electrode tooth 110, the electrode tooth 110 is away from the mounting portion 120 and has a chamfer on the inner side, the stator core 100 is provided with two pairs, and the electrode teeth 110 of each pair of stator cores 100 are meshed with each other, the plastic package 200 is injection molded to form a shell, the inner side of the shell forms a rotor cavity 220, the outer side of the shell forms a winding frame 210, the upper end of the shell forms a gear box 230, and the shell will fix the mounting portion 120 of the stator core 100 in the plastic package 200 during the injection molding process, and one side of the electrode tooth 110 will be exposed on the inner surface of the rotor cavity 220. The stator coil 400 is wound on two winding skeletons 210 outside the plastic package 200. The rotor module includes a rotor 310 and a rotor shaft 320. The rotor 310 is arranged in the rotor cavity 220. One end of the rotor shaft 320 is connected to the rotor 310, and the other end passes through the plastic package 200 and is exposed on one side of the gear box 230. The end of the rotor shaft 320 away from the rotor 310 is tooth-shaped. The first housing 800 is arranged on the outside of the plastic package 200 to cover the rotor cavity 220 and the winding skeleton 210. The cover plate 700 covers the gear box 230. The cover plate 700 is provided with a gear shaft for installing the gear. The gear is arranged on the cover plate 700 through the gear shaft to form a gear set 600. The gear box 230 is provided with a blind hole corresponding to the position of the gear shaft on the cover plate 700. When the user sets the cover plate 700 on the gear box 230, the gear shaft is aligned with the blind hole in the gear box 230, and the gear set 600 is set in the gear box 230 and meshes with the tooth portion of the rotor shaft 320. The connecting device 500 is arranged on one side of the plastic package 200, and the connecting device 500 includes a terminal 510 and a circuit board 520. The terminal 510 is arranged on the side of the gear box 230, and the stator coil 400 is wound around the terminal 510 to form a connection with the terminal 510. The circuit board 520 is connected to one end of the terminal 510 away from the plastic package 200. In addition, the connecting device 500 also includes a pin header 530 or a connector 540, and the connecting device 500 is connected to the power supply equipment through the pin header 530 or the connector 540.

[0044] According to the motor of the embodiment of the present invention, the plastic package 200 integrally forms the winding frame 210, the rotor cavity 220 and the gear box 230, and fixes the stator core 100 at the corresponding position of the plastic package 200, which effectively simplifies the assembly process of the motor, reduces the assembly error that may occur during assembly, improves the assembly accuracy of the motor, and improves the stability and working performance of the motor after assembly. The connecting device 500 is arranged on one side of the plastic package 200 to directly supply power to the stator coil 400, which improves the convenience of using the motor and the stability of the motor when working. By arranging the first shell 800 and the cover plate 700 on the outer side of the plastic package 200, the overall structure of the motor can be protected. By arranging the gear set 600 and arranging the gear set 600 on the cover plate 700, the gear set 600 can change the speed and output direction of the rotor shaft 320, and when the gear set 600 fails, the cover plate 700 can be quickly removed to repair the gear set 600.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 representation of the above terms does 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.

[0046] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric motor, characterized in that: include: A stator core (100), the stator core (100) comprising electrode teeth (110), the stator cores (100) being arranged to mesh with each other in pairs; A plastic sealing member (200), wherein the plastic sealing member (200) is plastic-sealed on the stator core (100) to form a shell, the outer side of the shell forms a winding frame (210), the inner side of the shell forms a rotor cavity (220), one end of the shell forms a gear box (230), and the electrode teeth (110) are exposed on one side of the rotor cavity (220); A rotor module, the rotor module comprising a rotor (310) and a rotor shaft (320), the rotor (310) being arranged in the rotor cavity (220) and opposite to the position of the stator core (100), the rotor shaft (320) being arranged on the rotor (310), and the rotor shaft (320) passing through one side of the housing and being exposed at one side of the gear box (230); A stator coil (400), the stator coil (400) is wound on the winding frame (210) and is located opposite to the stator core (100).

2. The electric motor according to claim 1, characterized in that A chamfer is provided on one side of the electrode tooth (110) close to the rotor cavity (220).

3. The electric motor according to claim 1, characterized in that Also included is a connecting device (500), the connecting device (500) comprising a wiring terminal (510) and a circuit board (520), one end of the wiring terminal (510) being connected to the circuit board (520), and the other end being arranged on a side of the gear box (230) and connected to the stator coil (400), the connecting device (500) being used to transmit electric energy to the stator coil (400).

4. The electric motor according to claim 3, characterized in that The connecting device (500) further comprises a pin header (530), one end of which is connected to the circuit board (520).

5. The electric motor according to claim 3, characterized in that The connecting device (500) further comprises a connector (540), one end of the connector (540) being connected to the circuit board (520).

6. The electric motor according to claim 1, characterized in that A gear set (600) is also included. The gear set (600) is disposed in the gear box (230), and the rotor shaft (320) outputs rotation through the gear set (600).

7. The electric motor according to claim 6, characterized in that Also included is a cover plate (700), which is disposed on the gear box (230) and is used to close the gear box (230).

8. The electric motor according to claim 7, characterized in that The gear set (600) is arranged on the cover plate (700).

9. The electric motor according to claim 7, characterized in that It also includes a first shell (800), wherein the first shell (800) is arranged outside the plastic package (200).

10. The electric motor according to claim 9, characterized in that The first shell (800) and the cover plate (700) are cooperatively connected to each other.

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