A motor structure with a built-in drive circuit board

Abstract

The utility model provides a motor structure of built-in drive circuit board, including the outer cover with electric appliance cavity, the motor body for output power, drive circuit board for controlling motor body and the base for fixing drive circuit board on the outer cover, motor body sets up on the outer cover and is located electric appliance cavity front part, the base sets up on the outer cover and is located electric appliance cavity rear part, drive circuit board sets up in the base, the utility model provides a motor structure of built-in drive circuit board, it installs drive circuit board, motor body in the outer cover, has reduced the overall volume of motor, has saved the installation space of motor, can reduce the production cost of enterprise to a certain extent.

Description

Technical Field

[0001] This utility model belongs to the technical field of electric motors, specifically relating to a motor structure with a built-in drive circuit board. Background Technology

[0002] DC motors are widely used in household appliances and industrial electrical appliances due to their high energy efficiency, energy saving and environmental protection, large torque, wide speed range, strong overload capacity, and low susceptibility to electromagnetic interference. DC motors require a drive circuit board to operate normally. The problem is that traditional DC motors use an independent connection between the motor and the drive circuit board. The drive circuit board needs a separate mounting box located outside the motor, resulting in a large overall size and requiring significant installation space. This makes it difficult to reduce the size of the appliance and increases production costs. Furthermore, when installing a DC motor in an appliance, installers or users need to install the motor and drive circuit board separately, increasing the installation process and reducing installation efficiency.

[0003] Therefore, further improvements are needed. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one of the shortcomings of the prior art and provide a motor structure with a built-in drive circuit board, which installs the drive circuit board and the motor body inside the outer casing, reducing the overall volume of the motor, saving the installation space of the motor, and reducing the production cost of enterprises to a certain extent.

[0005] To achieve the above objectives, the technical solution provided by this utility model embodiment is as follows:

[0006] A motor structure with a built-in drive circuit board includes an outer casing having an electrical cavity, a motor body for outputting power, a drive circuit board for controlling the motor body, and a base for fixing the drive circuit board to the outer casing. The motor body is disposed on the outer casing and located at the front of the electrical cavity, the base is disposed on the outer casing and located at the rear of the electrical cavity, and the drive circuit board is disposed inside the base.

[0007] The base is made of insulating material to insulate the drive circuit board from the outer cover. The base has a receiving cavity and an opening that connects to the receiving cavity. The radial dimension of the receiving cavity is equivalent to the radial dimension of the drive circuit board. When the base is installed on the outer cover, the opening faces the front of the electrical cavity, and the drive circuit board is placed in the receiving cavity through the opening.

[0008] A first mounting structure is provided between the drive circuit board, the base, and the outer cover. The first mounting structure includes a first drive mounting hole on the drive circuit board, a first insulating mounting hole on the base, a first outer cover mounting hole on the outer cover, and a first fastening component. The first drive mounting hole, the first insulating mounting hole, and the first outer cover mounting hole are correspondingly arranged. When the base and the drive circuit board are placed on the outer cover in sequence, the first fastening component passes through the first outer cover mounting hole, the first insulating mounting hole, and the first drive mounting hole in sequence and is fastened to securely connect them, so that the base and the drive circuit board are securely mounted on the outer cover.

[0009] The base is also provided with supporting protrusions, which extend from the bottom of the cavity towards the cavity opening. There are several supporting protrusions arranged evenly in a circumferential direction. When the drive circuit board is placed in the cavity, a certain distance is left between the drive circuit board and the bottom surface of the cavity through the supporting protrusions.

[0010] The motor structure also includes a heat-conducting component, which is disposed on the back of the drive circuit board. The base is also provided with a heat-conducting hole that connects to the receiving cavity. The heat-conducting hole is disposed on the end face of the base. The inner diameter of the heat-conducting hole is approximately equal to the outer diameter of the heat-conducting component. When the drive circuit board is placed on the base, the heat-conducting component extends out of the base through the heat-conducting hole and contacts the outer cover to conduct the heat of the drive circuit board to the outer cover.

[0011] The motor body includes a coil mounting base, a coil component, a rotating shaft component, a magnetic ring component, and a rotor housing. The coil mounting base is disposed on the outer cover, the coil component is disposed on the coil mounting base, the magnetic ring component is disposed in the inner cavity of the rotor housing, and the rotating shaft component is rotatably disposed on the coil mounting base, with one end extending outward from the outer cover and the other end connected to the rotor housing.

[0012] A second mounting structure is provided between the coil mounting base and the outer cover. The second mounting structure includes a second mounting base screw hole provided on the coil mounting base, a second outer cover mounting hole provided on the outer cover and corresponding to the second mounting base screw hole, and a second fastening component. When the coil mounting base is placed in the electrical cavity, the second fastening component passes through the second outer cover mounting hole and is screwed to the second mounting base screw hole, so that the coil mounting base is fixed on the outer cover.

[0013] The motor body also includes bearing components, which are disposed between the coil mounting base and the rotating shaft component. There are two bearing components, which are located at the two ends of the coil base respectively.

[0014] The outer cover is made of metal and includes a front cover and a rear cover. The front cover and the rear cover cover cover each other to form an electrical cavity. The motor body is disposed on the front cover, and the drive circuit board and the base are disposed on the rear cover.

[0015] The motor structure also includes a power cord and a synchronous motor. The outer cover is provided with a wire hole for the power cord to extend out of the electrical cavity, a motor mounting hole for mounting the synchronous motor, and a support shaft for supporting the motor on the electrical equipment. The wire hole and the motor mounting hole are located on the end face of the rear cover, and the support shaft is located on the front cover and / or the rear cover and is located on the lower side of the outer cover.

[0016] The beneficial effects of this utility model are as follows:

[0017] By adopting the above-mentioned technical solution, the motor structure of this utility model has the motor body and drive circuit board installed in the electrical cavity of the outer casing, so that the drive circuit board is integrated into the motor, making the overall structure of the motor more compact, reducing the overall size of the motor, and reducing the installation space occupied by the motor. This allows enterprises to design electrical appliances with smaller external dimensions, which can reduce the production costs of enterprises to a certain extent.

[0018] By adopting the above-mentioned technical solution, the overall structure of the motor is simplified, reducing the installation steps for installers or users when installing or replacing the motor, facilitating motor installation, and improving motor assembly efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a motor according to an embodiment of the present invention.

[0020] Figure 2 This is a cross-sectional view of a motor according to an embodiment of the present invention.

[0021] Figure 3 This is an exploded view of a motor according to an embodiment of the present invention.

[0022] Figure 4 This is an exploded view of a motor according to an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] See Figure 1-4The motor structure with built-in drive circuit board includes an outer cover 1, a motor body 2, a drive circuit board 3, and a base 4. In this embodiment, the outer cover 1 is made of ferrous metal and includes a front cover 11 and a rear cover 12 that cover each other. The front cover 11 and the rear cover 12 are fastened together by screws and nuts. The inner cavity of the front cover 11 and the inner cavity of the rear cover 12 together form an electrical cavity 101. The motor body 2 is fixed on the front cover 11 and located at the front of the electrical cavity 101. The base 4 is preferably made of insulating material such as plastic and is fixed on the rear cover 12 and located at the rear of the electrical cavity 101. This structure can physically isolate the drive circuit board 3 from the metal outer cover 1, preventing current leakage or short circuits and improving the safety of the motor. The drive circuit board 3 is fixedly mounted in the base 4, allowing it to be fixed on the rear cover 12. The motor body 2 and the drive circuit board 3 form a front-rear partition layout, which makes reasonable use of the internal space of the motor and facilitates the layout of internal circuits. Thus, the motor body 2 and the drive circuit board 3 are both installed in the electrical cavity 101 of the outer cover 1, allowing the drive circuit board 3 to be integrated into the motor. This reduces the external connection harness between the drive circuit board 3 and the motor body 2, making the electrical cavity 101 relatively closed, improving the waterproof performance of the motor. Furthermore, the overall structure of the motor is more compact and reasonable, reducing the overall volume of the motor and the installation space occupied by the motor. This allows companies to design electrical appliances with smaller dimensions, which can reduce production costs to a certain extent.

[0025] By adopting the above-mentioned technical solution, the overall structure of the motor is simplified, reducing the installation steps for installers or users when installing or replacing the motor, facilitating motor installation, and improving motor assembly efficiency.

[0026] Furthermore, in this embodiment, the base 4 is provided with a receiving cavity 401 and a cavity opening 402. Specifically, when the base 4 is installed on the outer cover 1, the cavity opening 402 faces the front of the electrical cavity 101 and is arranged in the same direction as the opening of the rear cover 12 and communicates with the receiving cavity 401, so that the drive circuit board 3 can be installed in the receiving cavity 401, and the wiring between the drive circuit board 3 and the motor body 2 can be connected through the cavity opening 402, which improves the assembly convenience of the motor. The radial dimension of the receiving cavity 401 is equal to or slightly larger than the radial dimension of the drive circuit board 3, so as to achieve precise positioning and fixation of the drive circuit board 3 in the receiving cavity 401 of the base 4, and avoid the drive circuit board 3 from shaking in the electrical cavity 101. This is understood by those skilled in the art.

[0027] Furthermore, a first mounting structure is provided between the drive circuit board 3, the base 4, and the outer cover 1. Specifically, in this embodiment, the first mounting structure includes a first drive mounting hole 301, a first insulating mounting hole 403, a first outer cover mounting hole 102, and a first fastening component. The first drive mounting hole 301 is disposed through the end face of the drive circuit board 3, preferably three in number and evenly spaced circumferentially. The first insulating mounting hole 403 is disposed through the end face of the base 4, preferably three in number and evenly spaced circumferentially. The first outer cover mounting hole 102 is disposed through the end face of the rear cover 12, preferably three in number and evenly spaced circumferentially. The first fastening component is preferably a screw, nut, or rivet. Mounting hole 403 and first outer cover mounting hole 102 are correspondingly provided. When base 4 and drive circuit board 3 are placed on rear cover 12 in sequence, the first fastening component passes through the first outer cover mounting hole 102, the first insulation mounting hole 403 and the first drive mounting hole 301 in sequence and is fastened to the rear cover 12, so that base 4 and drive circuit board 3 are fastened to the rear cover 12. Through the above technical solution, the drive circuit board 3, base 4 and rear cover 12 form a rigid connection, ensuring that base 4 and drive circuit board 3 are fastened to the rear cover 12, avoiding loosening of components due to vibration. At the same time, only the first fastening component needs to be removed to remove base 4 and drive circuit board 3 from the rear cover 12, improving the convenience of installation, removal and maintenance of drive circuit board 3. This is understood by those skilled in the art.

[0028] Furthermore, the base 4 is also provided with a supporting protrusion 404. Specifically, in this embodiment, the supporting protrusion 404 extends from the bottom of the receiving cavity 401 towards the cavity opening 402. The number of supporting protrusions 404 is preferably three and they are evenly arranged in a circumferential direction. The first insulating mounting hole 403 is provided on the supporting protrusion 404. When the drive circuit board 3 is placed in the receiving cavity 401, a certain distance is left between the drive circuit board 3 and the bottom surface of the receiving cavity 401 through the supporting protrusion 404. Through the above technical solution, an air circulation channel is formed between the drive circuit board 3 and the bottom surface of the receiving cavity 401, which accelerates the heat dissipation of the drive circuit board 3, avoids the aging of the drive circuit board 3 due to heat accumulation, and extends the service life of the drive circuit board 3. This is understood by those skilled in the art.

[0029] Furthermore, the motor structure also includes a heat-conducting component 5, and a heat-conducting hole 405 is provided on the base 4. Specifically, in this embodiment, six square-shaped MOS transistors are provided on the back of the drive circuit board 3. The heat-conducting component 5 is preferably thermally conductive silicone and is installed on the MOS transistors of the drive circuit board 3 by means of adhesive bonding or other methods. The heat-conducting hole 405 is provided on the end face of the base 4 and connects to the receiving cavity 401. The inner hole size of the heat-conducting hole 405 is equal to or slightly larger than the outer edge size of the heat-conducting component 5, so that the heat-conducting component 5 can pass through the heat-conducting hole. When the drive circuit board 3 is placed on the base 4, the heat-conducting component 5 extends out of the base 4 through the heat-conducting hole 405 and contacts the outer cover 1, so that the heat of the drive circuit board 3 is transferred to the outer cover 1 through the heat-conducting component 5. Through the above technical solution, the heat of the drive circuit board 3 is directly conducted to the metal outer cover 1, and the heat dissipation efficiency is improved by utilizing the heat dissipation area of ​​the outer cover 1, further solving the heat dissipation problem of the drive circuit board 3. This is understandable to those skilled in the art.

[0030] Furthermore, the motor body 2 includes a coil mounting base 21, a coil component 22, a rotating shaft component 23, a magnetic ring component 24, and a rotor housing 25. Specifically, in this embodiment, the coil mounting base 21 is fixed to the front cover 11 by a second mounting structure. The coil component 22 is preferably an electromagnetic coil and is fitted onto the column portion of the coil mounting base 21 with an interference fit. The magnetic ring component 24 is preferably an electromagnet and is embedded in the inner cavity of the rotor housing 25 with an interference fit. The rotating shaft component 23 is preferably a motor shaft and is rotatably mounted on the inner hole of the coil mounting base 21. One end of the rotating shaft component 23 extends outward from the end face of the front cover 11 and is connected to components such as fan blades. The other end of the rotating shaft component 23 is connected to the rotor housing 25 through a pin and pin groove structure. When the coil component 22 is energized, the coil component 22 generates a magnetic field that drives the magnetic ring component 24 to rotate and drives the rotor housing 25 to rotate, transmitting power to the rotating shaft component 23 to form a complete power output system, ensuring stable motor operation. This is understood by those skilled in the art.

[0031] Furthermore, in this embodiment, the second mounting structure includes a second mounting base screw hole 211, a second outer cover mounting hole 103, and a second fastening component. Specifically, the second mounting base screw hole 211 is provided through the end face of the coil mounting base 21, preferably four in number and evenly spaced circumferentially. The second outer cover mounting hole 103 is provided through the end face of the front cover 11, preferably four in number and evenly spaced circumferentially. The second mounting base screw hole 211 and the second outer cover mounting hole 103 are correspondingly provided. The second fastening component is preferably a screw that engages with the second mounting base screw hole 211. When the coil mounting base 21 is placed in the electrical cavity 101, the second fastening component passes through the second outer cover mounting hole 103 and is screwed together with the second mounting base screw hole 211, so that the coil mounting base 21 is fixedly mounted on the outer cover 1. Through the above technical solution, the motor body 2 is securely fixed, avoiding vibration during operation that could cause the motor body 2 to accidentally come out of the electrical cavity 101, thus ensuring the operating performance of the motor. This is understood by those skilled in the art.

[0032] Furthermore, the motor body 2 also includes a bearing component 26. Specifically, in this embodiment, the bearing component 26 is preferably a rolling bearing and is disposed between the coil mounting base 21 and the rotating shaft component 23. The number of bearing components 26 is preferably two and they are respectively located at both ends of the coil mounting base 21. Through the above technical solution, the layout of the double bearing component 26 can optimize the support structure of the rotating shaft component 23, reduce the rotational friction between the rotating shaft component 23 and the coil mounting base 21, reduce the noise and energy consumption of the motor during operation, and improve the operating accuracy and life of the motor. This can be understood by those skilled in the art.

[0033] Furthermore, the motor structure also includes a power supply line and a synchronous motor. The rear cover 12 is provided with a wire hole 104, a motor mounting hole 105, and a support shaft 13. Specifically, in this embodiment, the wire hole 104 is provided through the end face of the rear cover 12, preferably two, and is located opposite each other on the left and right sides of the end face of the rear cover 12. One wire hole 104 is used for the power supply line between the drive circuit board 3 and the external power supply to pass through the electrical cavity 101, and the other wire hole 104 is used for the power supply line between the drive circuit board 3 and the synchronous motor to pass through the electrical cavity 101. The motor mounting hole 105 is provided through the rear cover 12. On the end face of the cover 12, the number of the synchronous motor is preferably four and is set at the lower part of the end face of the rear cover 12 for mounting the synchronous motor. The support shaft 13 is mounted on the front cover 11 and the rear cover 12 by a fastening structure and is located on the lower side of the outer cover 1. The motor can be supported on the electrical equipment by the support shaft 13. Through the above technical solution, the motor mounting hole 105 can enable the synchronous motor to be mounted on the motor, and the wire hole 104 facilitates the simultaneous connection of the drive circuit board 3 with the synchronous motor and the external power supply to realize the coordinated control of multiple motors, which can expand the application scenarios and functions of the motor. This is understood by those skilled in the art.

[0034] The above describes the preferred embodiments of this utility model, illustrating and describing its basic principles, main features, and advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made without departing from the spirit and scope of this utility model, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A motor structure with a built-in drive circuit board, characterized in that, The device includes an outer casing (1) with an electrical cavity (101), a motor body (2) for outputting power, a drive circuit board (3) for controlling the motor body (2), and a base (4) for fixing the drive circuit board (3) to the outer casing (1). The motor body (2) is disposed on the outer casing (1) and located at the front of the electrical cavity (101), the base (4) is disposed on the outer casing (1) and located at the rear of the electrical cavity (101), and the drive circuit board (3) is disposed inside the base (4).

2. The motor structure with built-in drive circuit board according to claim 1, characterized in that, The base (4) is made of insulating material to insulate the drive circuit board (3) from the outer cover (1). The base (4) is provided with a receiving cavity (401) and a cavity opening (402) communicating with the receiving cavity (401). The radial dimension of the receiving cavity (401) is equivalent to the radial dimension of the drive circuit board (3). When the base (4) is installed on the outer cover (1), the cavity opening (402) faces the front of the electrical cavity (101). The drive circuit board (3) is placed in the receiving cavity (401) through the cavity opening (402).

3. The motor structure with built-in drive circuit board according to claim 2, characterized in that, A first mounting structure is provided between the drive circuit board (3), the base (4) and the outer cover (1). The first mounting structure includes a first drive mounting hole (301) on the drive circuit board (3), a first insulating mounting hole (403) on the base (4), a first outer cover mounting hole (102) on the outer cover (1), and a first fastening component. The first drive mounting hole (301), the first insulating mounting hole (403) and the first outer cover mounting hole (102) are correspondingly provided. When the base (4) and the drive circuit board (3) are placed on the outer cover (1) in sequence, the first fastening component passes through the first outer cover mounting hole (102), the first insulating mounting hole (403) and the first drive mounting hole (301) in sequence and is fastened to connect them, so that the base (4) and the drive circuit board (3) are fastened to the outer cover (1).

4. The motor structure with built-in drive circuit board according to claim 2, characterized in that, The base (4) is also provided with a supporting protrusion (404). The supporting protrusion (404) extends from the bottom of the receiving cavity (401) towards the cavity opening (402). There are several supporting protrusions (404) and they are evenly arranged in the circumferential direction. When the driving circuit board (3) is placed in the receiving cavity (401), there is a certain distance between the driving circuit board (3) and the bottom surface of the receiving cavity (401) through the supporting protrusion (404).

5. The motor structure with built-in drive circuit board according to claim 2, characterized in that, The motor structure also includes a heat-conducting component (5), which is disposed on the back of the drive circuit board (3). The base (4) is also provided with a heat-conducting hole (405) that connects to the receiving cavity (401). The heat-conducting hole (405) is disposed on the end face of the base (4). The inner hole size of the heat-conducting hole (405) is equivalent to the outer edge size of the heat-conducting component (5). When the drive circuit board (3) is placed on the base (4), the heat-conducting component (5) extends out of the base (4) through the heat-conducting hole (405) and contacts the outer cover (1) to conduct the heat of the drive circuit board (3) to the outer cover (1).

6. The motor structure with built-in drive circuit board according to claim 1, characterized in that, The motor body (2) includes a coil mounting base (21), a coil component (22), a rotating shaft component (23), a magnetic ring component (24), and a rotor housing (25). The coil mounting base (21) is mounted on the outer cover (1), the coil component (22) is mounted on the coil mounting base (21), the magnetic ring component (24) is mounted in the inner cavity of the rotor housing (25), and the rotating shaft component (23) is rotatably mounted on the coil mounting base (21), with one end extending outward from the outer cover (1) and the other end connected to the rotor housing (25).

7. The motor structure with a built-in drive circuit board according to claim 6, characterized in that, A second mounting structure is provided between the coil mounting base (21) and the outer cover (1). The second mounting structure includes a second mounting base screw hole (211) provided on the coil mounting base (21), a second outer cover mounting hole (103) provided on the outer cover (1) and corresponding to the second mounting base screw hole (211), and a second fastening component. When the coil mounting base (21) is placed in the electrical cavity (101), the second fastening component passes through the second outer cover mounting hole (103) and is screwed to the second mounting base screw hole (211), so that the coil mounting base (21) is fixedly mounted on the outer cover (1).

8. The motor structure with built-in drive circuit board according to claim 6, characterized in that, The motor body (2) also includes a bearing component (26), which is disposed between the coil mounting base (21) and the shaft component (23). There are two bearing components (26) and they are located at the two ends of the coil mounting base (21).

9. The motor structure with a built-in drive circuit board according to any one of claims 1-8, characterized in that, The outer cover (1) is made of metal material and includes a front cover (11) and a rear cover (12). The front cover (11) and the rear cover (12) cover each other and form an electrical cavity (101). The motor body (2) is disposed on the front cover (11), and the drive circuit board (3) and the base (4) are disposed on the rear cover (12).

10. The motor structure with a built-in drive circuit board according to claim 9, characterized in that, The motor structure also includes a power cord and a synchronous motor. The outer cover (1) is provided with a wire hole (104) for the power cord to extend out of the electrical cavity (101), a motor mounting hole (105) for mounting the synchronous motor, and a support shaft (13) for supporting the motor on the electrical equipment. The wire hole (104) and the motor mounting hole (105) are located on the end face of the rear cover (12), and the support shaft (13) is located on the front cover (11) and / or the rear cover (12) and is located on the lower side of the outer cover (1).

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