CN111917199A - Electric motor - Google Patents

Abstract

The invention discloses a motor, which comprises a stator core, a plastic package part, a rotor module and a stator coil, wherein the stator core comprises electrode teeth, the stator cores are arranged in a pairwise mutual meshing manner, the plastic package part is used for plastically packaging and fixing the stator cores to form a winding framework, a rotor cavity and a gear box, the stator core is exposed out of the inner side of the rotor cavity, the rotor module comprises a rotor shaft and a rotor, the rotor is connected with the rotor shaft, the rotor is arranged in the rotor cavity, the rotor shaft is exposed out of one side of the gear box through the plastic package part, and the stator coil is wound on the winding framework. According to the motor, the plastic package part is used for injection molding the winding framework, the rotor cavity and the gear box at one time, and the stator core is fixed at the corresponding position of the plastic package part, so that the assembly process of the motor is simplified, and the assembly precision of the motor is improved.

Description

electric motor

technical field

The present invention relates to the technical field of electric motors, and in particular, to a motor.

Background technique

An electric motor is a device that converts electrical energy into mechanical energy. It uses the energized coil to generate a rotating magnetic field and acts on the rotor to form a magneto-electric power rotating torque. In the prior art, the motor is generally assembled from multiple parts, and the user needs to arrange the various components in the motor in sequence into the motor shell to assemble the motor. The dimensional tolerance of each product affects the overall assembly accuracy of the motor, which in turn affects the performance of the assembled motor, and there may be large performance differences between different motors due to assembly errors.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems existing in the prior art. Therefore, the present invention proposes a motor in which the stator frame and the gear box are integrally formed, and the electrode teeth are fixed in the stator frame by plastic sealing, which simplifies the overall assembly process of the motor and ensures the assembly of the motor. The precision improves the stability and working performance of the motor after the assembly is completed.

The motor according to the embodiment of the first aspect of the present invention includes: a stator iron core, the stator iron core includes electrode teeth, and the stator iron cores are meshed with each other; A casing is formed on the iron core, the outer side of the casing forms a winding skeleton, the inner side of the casing forms a rotor cavity, one end of the casing forms a gear box, and the electrode teeth are located in the rotor cavity. One side is exposed; a rotor module, the rotor module includes a rotor and a rotor shaft, the rotor is arranged in the rotor cavity and is opposite to the position of the stator iron core, and the rotor shaft is arranged on the On the rotor, the rotor shaft passes through one side of the casing and is exposed on one side of the gear box; the stator coil is wound on the bobbin and is connected with the stator iron core relative position.

The motor according to the embodiment of the present invention has at least the following technical effects: the plastic package is injection-molded, the winding skeleton, the gear box and the rotor cavity are formed at one time, and the stator iron core is fixed on the corresponding position of the plastic package. Compared with traditional motors, the stator iron core has been fixed in the corresponding position of the plastic package. When installing the motor, the user only needs to set the stator coil and rotor module in the corresponding position, which greatly simplifies The assembly process of the motor is simplified, and the simplified assembly process effectively reduces the assembly errors that may occur during the assembly of the motor, improves the overall assembly accuracy of the motor, and improves the stability and work performance of the motor after the assembly is completed. In traditional motors, the gearbox and the stator frame are mostly spliced together by two parts. When the gearbox and the stator frame are assembled together, it is difficult to ensure that the shaft hole of the rotor cavity and the shaft hole in the middle of the gearbox for the rotor shaft to pass through are two parts. There may be a large positional deviation in the coaxiality between the two. In this solution, the gearbox and the stator skeleton are integrally formed, and the two shaft holes are integrated on the partition plate between the gearbox and the rotor cavity after one-time injection molding of the plastic seal to ensure the coaxiality between the two shaft holes.

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

According to some embodiments of the present invention, a connection device is further included, the connection device includes a terminal and a circuit board, one end of the terminal is connected with the circuit board, and the other end is arranged on one side of the gear box and is connected to the circuit board. Connected with the stator coil, the connection device is used for transmitting electrical energy to the stator coil.

According to some embodiments of the present invention, the connection device further includes a pin header, and one end of the pin header is connected to the circuit board.

According to some embodiments of the present invention, the connection device further includes a connector, and one end of the connector is connected to the circuit board.

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

According to some embodiments of the present invention, a cover plate is further included, and the cover plate is arranged on the gear box and is used to close the gear box.

According to some embodiments of the present invention, the gear set is provided on the cover plate.

According to some embodiments of the present invention, a first casing is further included, and the first casing is disposed outside the plastic package.

According to some embodiments of the present invention, the first housing and the cover plate are connected with each other.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

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

2 is a schematic structural diagram of an exploded motor according to an embodiment of the present invention;

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

FIG. 4 is a cross-sectional view of another structure of a motor according to an embodiment of the present invention;

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

6 is a schematic structural diagram of a stator iron core in a motor according to an embodiment of the present invention.

Reference number:

Stator iron core 100, electrode teeth 110, mounting part 120, plastic seal 200, winding bobbin 210, rotor cavity 220, gearbox 230, rotor 310, rotor shaft 320, stator coil 400, connection device 500, terminal 510, circuit Board 520 , pin header 530 , connector 540 , second housing 550 , third housing 560 , gear set 600 , cover plate 700 , and first housing 800 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that the azimuth description, such as the azimuth or position relationship indicated by up, down, front, rear, left, right, etc., is based on the azimuth or position relationship shown in the drawings, only In order to facilitate the description of the present invention and simplify the description, it is not indicated or implied that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description of the present invention, if it is described that the first and the second are only for the purpose of distinguishing technical features, it should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating The order of the indicated technical features.

In the description of the present invention, unless otherwise clearly defined, words such as setting, installation, connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

A motor according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 6 .

For example, as shown in FIG. 1 to FIG. 6 , the motor according to the present invention includes: a stator iron core 100, which includes electrode teeth 110, and the stator iron cores 100 are meshed with each other; 200 is plastic-sealed on the stator core 100 to form a casing, the outer side of the casing forms a winding skeleton 210 , the inner side of the casing forms a rotor cavity 220 , and one end of the casing forms a gear box 230 , and the electrode teeth 110 are in the rotor cavity 220 . One side is exposed; the 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, and the rotor shaft 320 passes through one side of the casing and is exposed on one side of the gear box 230 ; the stator coil 400 is wound on the bobbin 210 and is opposite to the position of the stator iron core 100 .

As shown in FIG. 1 to FIG. 6 , after the injection molding of the plastic package 200 is completed, a casing is formed, wherein the inner side of the casing forms a rotor cavity 220 , the outer side of the casing forms two winding skeletons 210 , and the upper end of the casing forms a gear box 230 . The stator core 100 with the 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 the side of the electrode teeth 110 of the stator core 100 is on the rotor. The surface of cavity 220 is exposed. The stator coils 400 are respectively wound on the two bobbins 210 , the rotor 310 is arranged in the rotor cavity 220 , and the rotor shaft 320 is connected with the rotor 310 and is exposed through the upper surface of the gear box 230 .

According to the motor according to the embodiment of the present invention, the winding skeleton 210, the gear box 230 and the rotor cavity 220 are integrally formed by the plastic package 200, and the stator iron core 100 is fixed on the corresponding position of the plastic package 200. The user is assembling the motor. When the rotor module is installed in the rotor cavity 220, the stator coil 400 is wound on the bobbin 210, which simplifies the assembly process of the motor. In addition, the positions of the stator iron core 100 and each installation position on the plastic package 200 are fixed to each other, which effectively improves the precision of the motor assembly, and improves the stability and work performance of the motor after the assembly is completed.

In some specific embodiments of the present invention, the side of the electrode teeth 110 close to the rotor cavity 220 is provided with a chamfer. For example, as shown in FIG. 3 and FIG. 6 , the stator iron cores 100 are meshed with each other, the side of the electrode teeth 110 in the stator iron core 100 away from the mounting portion 120 is provided with a chamfer, and the position of the chamfer is fixed on the plastic sealing member 200 middle. By arranging chamfers on the electrode teeth 110, after the injection molding of the plastic package 200 is completed, a limit portion will be formed at the chamfer, 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 portion of the electrode teeth 110 is blocked by the plastic seal 200 , and the rest are exposed inside the rotor cavity 220 , and the plastic seal 200 will not block the magnetic field generated by the electrode teeth 110 too much.

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 disposed on the side of the gear box 230 and is connected to the circuit board 520. Connected to the stator coil 400 , the connection device 500 is used to transmit electrical energy to the stator coil 400 . For example, as shown in FIG. 2 , the connection device 500 includes a terminal 510 and a circuit board 520 , the terminal 510 is arranged on one side of the gear box 230 , and the stator coil 400 is wound on 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 . When the user wants to drive the motor to work, he can directly supply power to the stator coil 400 through the connecting device 500, and the rotor module can be driven to rotate after a magnetic field is generated in the stator iron core 100. In a traditional motor, it is necessary to connect the lead wire to each stator coil 400 separately to supply power, but the lead wire structure may be rubbed or damaged during installation, resulting in 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 in the motor of the present invention, the connection between the connection device 500 and the stator coil 400 is more stable, and the overall structure of the motor is also more stable. Arranging the terminal 510 on one side of the gear box 230 instead of the side of the bobbin 210 leaves room for the connection device 500 to be arranged downward for other components.

In a further embodiment of the present invention, the connection device 500 further includes a pin header 530 , and one end of the pin header 530 is connected to the circuit board 520 . For example, as shown in FIG. 2 and FIG. 3 , the pin header 530 is arranged in the second housing 550, the second housing 550 is arranged on the side of the plastic package 200 where the terminals 510 and the circuit board 520 are arranged, and one end of the pin header 530 is connected to the circuit The board 520 is connected, and the other end of the pin header 530 points away from the gear box 230 and is used to connect the power supply equipment. During the actual use of the motor, the output end will be connected to other devices to output the torque of the rotor. The orientation of the motor is set in the direction pointing to the output end, and the power supply device may interfere with the position of the device that outputs the torque of the motor. By arranging the pin header 530 in the connecting device 500, after the user connects the pin header 530 to the power supply device and energizes it, the stator coil 400 will generate a rotating magnetic field to drive the rotor module to rotate, which improves the convenience of the motor.

In a further embodiment of the present invention, the connection device 500 further includes a connector 540 , and one end of the connector 540 is connected to the circuit board 520 . For example, as shown in FIG. 4 , the connector 540 is arranged in the third housing 560 , the third housing 560 is arranged on the side of the plastic package 200 where the terminals 510 and the circuit board 520 are arranged, and one end of the connector 540 is connected to the circuit board 520 , the other end of the connector 540 points away from the gearbox 230 and is used to connect the power supply equipment. During the actual use of the motor, the output end of the motor will be connected to other equipment to output the torque of the rotor. If the direction of the connector 540 is set In the direction toward the output, 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 energizes, the stator coil 400 will generate a rotating magnetic field to drive the rotor module to rotate, which improves the convenience of the motor in use, and the connector The connection between the connector 540 and the power supply device is relatively stable, and the connection between the connector 540 and the power supply device will not be easily loosened during the operation of the motor, which improves the stability of the motor during operation.

In some specific embodiments of the present invention, a gear set 600 is further included, the gear set 600 is arranged in the gear box 230 , and the rotor shaft 320 outputs the rotation through the gear set 600 . For example, as shown in FIG. 2 and FIG. 3 , the gear box 230 is provided with a blind hole for setting the gear shaft, the gear shaft is arranged on the blind hole, and 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 extending away from the side of the rotor cavity 220 . One end of the rotor shaft 320 passing through the gear box 230 is toothed, and meshes with the gears in the gear set 600 , and 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 provided in the motor according to the actual use occasion of the motor, so as to achieve the purpose of changing the rotational speed of the output shaft or the output direction.

In a further embodiment of the present invention, a cover plate 700 is also included, and the cover plate 700 is disposed on the gear box 230 for covering the gear box 230 . For example, as shown in FIGS. 1 and 2 , the cover plate 700 is disposed above the gear box 230 and covers the gear set 600 . By arranging the cover plate 700 in the motor, the gear set 600 can be protected to prevent foreign objects from entering the gear box 230 during operation of the motor and causing damage to the gear or rotor shaft 320 in the gear set 600 .

In a further embodiment of the present invention, the gear set 600 is provided on the cover plate 700 . For example, as shown in FIG. 2 and FIG. 3 , the cover plate 700 is provided with several gear shafts on the side facing the gear box 230 , and the gears are arranged on the cover plate 700 through the gear shafts to form the gear set 600 , and the gear box 230 is provided with The blind holes corresponding to the positions of the gear shafts on the cover plate 700 are used for installing the gear set 600 . When the user covers the cover plate 700 on the gear box 230, the gear shaft is aligned with the blind hole in the gear box 230 to complete the installation of the gear set 600; when the user takes out the cover plate 700 upwards, the gear set 600 can be removed. Remove from gearbox 230. By arranging the gear set 600 on the cover plate 700, the convenience of the motor maintenance is improved. Specifically, the available operating space in the gear box 230 is small. When the gear set 600 is arranged in the gear box 230, if the gear set 600 fails, it will be difficult to repair the faulty part of the gear set 600; When the gear set 600 is disposed on the cover plate 700, if the gear set 600 fails, the user only needs to remove the cover plate 700, and then the gear set 600 can be taken out from the gear box 230 and the faulty part can be repaired.

In a further embodiment of the present invention, a first casing 800 is further included, and the first casing 800 is disposed outside the plastic package 200 . For example, as shown in FIG. 2 , the first casing 800 is disposed on the first casing 800 of the plastic package 200 and covers the winding bobbin 210 and the rotor cavity 220 . By arranging the first casing 800 in the motor, it can protect the plastic package 200 as a whole, and the first casing 800 covers the winding bobbin 210 and the rotor cavity 220, which can prevent the rotor 310 from being removed from the rotor during operation of the motor. The cavity 220 falls out or the stator coil 400 becomes loose from the bobbin 210 .

In a further embodiment of the present invention, the first housing 800 and the cover plate 700 are connected with each other. For example, as shown in FIG. 2 , an extension portion extending outwards is uniformly arranged around the cover plate 700 , the top of the first housing 800 is provided with a gap that matches the size and position of the extension portion, and the side of the plastic package 200 is also provided There are protrusions extending outward, which are matched with the notches on one side of the first housing 800 . When assembling the motor, the user first sets the rotor module and the stator coil 400 on the plastic package 200, and then aligns the protrusions of the plastic package 200 with the notch on the first housing 800, and installs it into the first housing 800. , and finally align the extension around the cover plate 700 with the notch on the top of the first housing 800 to cover the cover plate 700 above the casing. With the above arrangement, the plastic sealing member 200, the first casing 800 and the cover plate 700 cooperate with each other, which can effectively prevent the plastic sealing member 200 and the first casing 800 from rotating relative to each other during the operation of the motor, or the cover plate 700 and the first casing. The relative rotation of 800 further improves the stability of the motor structure.

The motor according to the embodiment of the present invention will be described in detail below with a specific embodiment according to FIGS. 1 to 6 . It is to be understood that the following description is illustrative only and not specific limitation of the invention.

As shown in FIGS. 1 to 6 , the motor includes a stator core 100 , a plastic package 200 , a rotor module, a stator coil 400 , a connection device 500 , a gear set 600 , a first housing 800 and a cover 700 , wherein the stator core 100 includes a mounting portion 120 and electrode teeth 110. The electrode teeth 110 are far from the mounting portion 120 and are provided with 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 mesh with each other. , the plastic package 200 is injection-molded to form a casing, the inner side of the casing forms a rotor cavity 220, the outer side of the casing forms a winding skeleton 210, and the upper end of the casing forms a gear box 230, and the casing is in the process of injection molding. The mounting portion 120 of the stator core 100 is fixed in the plastic package 200 , and one side of the electrode teeth 110 is exposed on the inner surface of the rotor cavity 220 . The stator coil 400 is wound on the two bobbins 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 seal 200 and is exposed on one side of the gearbox 230. The rotor shaft 320 The end away from the rotor 310 is toothed. The first casing 800 is disposed outside the plastic package 200 for covering the rotor cavity 220 and the winding bobbin 210 . The cover plate 700 is covered on 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 gear on the cover plate 700. The blind hole corresponding to the position of the shaft, when the user sets the cover plate 700 on the gearbox 230, the gear shaft is aligned with the blind hole in the gearbox 230, and the gear set 600 is set in the gearbox 230 and is in contact with the rotor shaft 320. The teeth mesh. The connection device 500 is arranged on one side of the plastic package 200 , the connection 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 with the terminal 510 . For connection, the circuit board 520 is connected to the end of the terminal 510 away from the plastic package 200. In addition, the connection device 500 also includes a pin header 530 or a connector 540, and the connection device 500 is connected to the power supply device through the pin header 530 or the connector 540. connect.

According to the motor according to the embodiment of the present invention, the plastic package 200 integrally forms the winding skeleton 210, the rotor cavity 220 and the gear box 230, and fixes the stator core 100 on the corresponding position of the plastic package 200, which effectively simplifies the assembly of the motor The process reduces the assembly errors that may occur during assembly, improves the assembly accuracy of the motor, and improves the stability and work performance of the motor after the assembly is completed. The connecting device 500 is disposed on one side of the plastic package 200 to directly supply power to the stator coil 400, which improves the convenience of the motor and the stability of the motor during operation. By arranging the first shell 800 and the cover plate 700 on the outer side of the plastic package 200 , the whole 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 rotational speed and the output direction of the output of the rotor shaft 320, and can quickly remove the cover plate 700 when the gear set 600 fails. Gear set 600 is serviced.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," or the like, is meant to incorporate the embodiment. A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A motor, characterized in that, comprising: A stator iron core (100), the stator iron core (100) includes electrode teeth (110), and the stator iron cores (100) are mutually meshed in pairs; A plastic sealing member (200), wherein the plastic sealing member (200) is plastically sealed on the stator iron core (100) to form a casing, the outer side of the casing forms a winding skeleton (210), and the inner side of the casing forms a rotor cavity (220), one end of the casing 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 connected with the stator core (100) In opposite positions, the rotor shaft (320) is arranged on the rotor (310), and the rotor shaft (320) passes through one side of the casing and is exposed on one side of the gear box (230); A stator coil (400), the stator coil (400) is wound on the bobbin (210) and is opposite to the position of the stator iron core (100). 2 . The motor according to claim 1 , wherein a chamfer is provided on a side of the electrode teeth ( 110 ) close to the rotor cavity ( 220 ). 3 . 3. The motor according to claim 1, characterized in that, further comprising a connection device (500), the connection device (500) comprising a terminal (510) and a circuit board (520), the terminal (500) One end of 510) is connected to the circuit board (520), the other end is arranged on the side of the gear box (230) and connected to the stator coil (400), and the connection device (500) is used to connect to the stator The coil (400) transmits electrical energy. 4 . The motor according to claim 3 , wherein the connecting device ( 500 ) further comprises a pin header ( 530 ), and one end of the pin header ( 530 ) is connected to the circuit board ( 520 ). 5 . 5. The motor according to claim 3, characterized in that, the connecting device (500) further comprises a connector (540), and one end of the connector (540) is connected to the circuit board (520). 6. The electric motor according to claim 1, further comprising a gear set (600), the gear set (600) being arranged in the gear box (230), and the rotor shaft (320) passing through The gear set (600) will rotate the output. 7. The electric motor according to claim 6, further comprising a cover plate (700), the cover plate (700) being arranged on the gear box (230) and used to close the gear box (700). 230). 8. The motor according to claim 7, wherein the gear set (600) is arranged on the cover plate (700). 9 . The motor according to claim 7 , further comprising a first casing ( 800 ), the first casing ( 800 ) being disposed outside the plastic package ( 200 ). 10 . 10. The motor according to claim 9, characterized in that, the first housing (800) and the cover plate (700) are connected to each other.

Images