Low-interference brush motor

Abstract

The utility model provides a low-interference type brush motor, and relates to the technical field of motors. The motor comprises a motor casing, a motor end cover, a circuit board, a driving unit and an output shaft, the motor casing is provided with a mounting port, the motor end cover can block the mounting port, the circuit board is arranged on the motor end cover, and a plurality of electronic components are arranged on the circuit board. And the driving unit is arranged in the motor shell and is in transmission connection with the output shaft. The circuit has the advantages of being good in electromagnetic compatibility and high in stability.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a low-interference brushed motor. Background Art

[0002] Working mechanisms such as electric vehicles require electric motors as a power source.

[0003] Existing motors generally include a casing, a rotor, a stator and an output shaft. The interior of the casing is provided with a motor chamber for installing the rotor and stator and an electronic component chamber. The inner wall of the electronic component chamber is provided with several storage slots. Filter capacitors, chip inductors and other electronic components used to improve the electromagnetic compatibility performance of the motor, sensors and controllers will be placed separately in each storage slot, and each electronic component is connected by leads.

[0004] However, since opening storage slots will occupy more space in the electronic component room, it is difficult to open enough storage slots in the electronic component room, and it is also difficult to store more filter capacitors and chip inductors, which makes the overall electromagnetic compatibility performance of the motor low, causing the motor to be easily disturbed by the outside world during operation and lack of stability.

[0005] In view of this, it is necessary to provide a low-interference brushed motor. Utility Model Content

[0006] In order to solve the problem that existing motors are difficult to store more filter capacitors and chip inductors, resulting in low electromagnetic compatibility performance of the motors and susceptibility to external interference, the present application provides a low-interference brushed motor.

[0007] The present application provides a low-interference brushed motor, which adopts the following technical solution including a motor housing, a motor end cover, a circuit board, a drive unit and an output shaft. The motor housing is provided with a mounting opening, and the motor end cover can block the mounting opening. The circuit board is arranged on the motor end cover, and a plurality of electronic components are arranged on the circuit board. The drive unit is arranged in the motor housing and is transmission-connected to the output shaft.

[0008] By adopting the above technical solution, electronic components such as filter capacitors, chip inductors, etc. for improving the electromagnetic compatibility performance of the motor, as well as sensors and controllers can be integrated into a circuit board, and then the circuit board can be installed on the motor end cover, so that there is no need to open corresponding installation slots for each electronic component on the motor casing or the motor end cover, which can not only reduce the difficulty of assembling the motor, but also improve the utilization rate of the internal space of the motor, and ensure that the motor has enough filter capacitors, chip inductors, etc. that can improve the electromagnetic compatibility performance, so that the motor is not easily affected by external interference during operation and has good stability.

[0009] Specifically, the drive unit includes a stator and a rotor, the stator is arranged in the motor casing, and a coil is provided on the inner side of the stator, and a magnet matching the coil is provided on the outer side of the rotor, one end of the output shaft passes through a through hole opened on the motor end cover and is inserted into the motor casing and connected to the rotor.

[0010] By adopting the above technical solution, the stator can drive the rotor to rotate around the rotating shaft through the coil, so that power can be output to the outside through the rotor.

[0011] Furthermore, a Hall element is provided on the circuit board, and a magnetic ring matched with the Hall element is sleeved on the output shaft.

[0012] By adopting the above technical solution, the magnetic ring can cooperate with the Hall element to measure the rotation direction and rotation speed of the output shaft and the rotor.

[0013] Furthermore, a grounding piece is also provided on the circuit board, and when the motor end cover is connected to the motor casing, the grounding piece can abut against the motor casing.

[0014] By adopting the above technical solution, the circuit board can be grounded to the motor housing through the grounding member, so as to further improve the overall electromagnetic compatibility of the motor.

[0015] Furthermore, a rotation groove is provided on the inner wall of the motor housing, one end of the output shaft passes through a through hole provided on the motor end cover and is inserted into the rotation groove, and a bearing is provided between the shaft body of the output shaft and the groove wall of the rotation groove;

[0016] The rotor is located between the rotation groove and the motor end cover.

[0017] By adopting the above technical solution, one end of the output shaft is inserted into the rotating groove and a bearing is provided between the output shaft and the groove wall of the rotating groove, so that the output shaft can be rotatably connected to the motor housing.

[0018] Furthermore, a worm is provided on the shaft body of the output shaft at one end away from the rotating groove.

[0019] By adopting the above technical solution, the output shaft can be connected to the working mechanism through the worm, so that the low-interference brushed motor can output power to the working mechanism.

[0020] Specifically, it also includes a plug and a power cord, wherein the plug is arranged on the motor end cover, one end of the power cord is connected to the plug, and the other end of the power cord is electrically connected to the drive unit and the circuit board.

[0021] By adopting the above technical solution, the drive unit and the circuit board can be connected to the power supply device and the controller through the plug on the power cord, so that the power supply device can provide power to the drive unit and the circuit board through the power cord, and the controller can be electrically connected to the circuit board through the power cord.

[0022] Furthermore, a conductive column is connected to one end of the power cord away from the plug, a positioning hole is provided on the circuit board, the conductive column can pass through the positioning hole and abut against the inner wall of the positioning hole, and the circuit board is electrically connected to the conductive column.

[0023] By adopting the above technical solution, the circuit board can be electrically connected to the power line through the guide column; and the conductive column can cooperate with the positioning hole on the circuit board to position the circuit board, so as to achieve rapid disassembly and assembly of the circuit board.

[0024] In summary, this application includes the following beneficial technical effects:

[0025] The invention comprises a motor casing, a motor end cover, a circuit board, a drive unit and an output shaft. The motor casing is provided with an installation opening, the motor end cover can block the installation opening, the circuit board is arranged on the motor end cover, and a plurality of electronic components are arranged on the circuit board. The drive unit is arranged in the motor casing and is connected to the output shaft in a transmission manner, so that workers can first integrate filter capacitors, chip inductors and other electronic components used to improve the electromagnetic compatibility performance of the motor, as well as sensors and controllers, into the circuit board, and then install the circuit board on the motor end cover, so that there is no need to open corresponding installation slots for each electronic component on the motor casing or the motor end cover, which can reduce the difficulty of assembling the motor and improve the utilization rate of the internal space of the motor, and ensure that the motor has enough filter capacitors, chip inductors and other electronic components that can improve the electromagnetic compatibility performance, so that the motor is not easily disturbed by the outside world during operation and has good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a stereogram of a low-interference brushed motor of the present application;

[0027] Figure 2 It is an exploded diagram of a low-interference brushed motor of the present application;

[0028] Figure 3 It is a schematic cross-sectional view taken along the central axis of the output shaft of a low-interference brushed motor of the present application.

[0029] Figure numerals: 1, motor housing; 11, rotating groove; 2, motor end cover; 3, circuit board; 31, grounding piece; 4, drive unit; 41, stator; 42, rotor; 5, output shaft; 51, magnetic ring; 52, worm; 6, plug; 7, power cord; 71, conductive column. DETAILED DESCRIPTION

[0030] Figure 1 It is a stereogram of a low-interference brushed motor of the present application, Figure 2 This is an exploded view of a low-interference brushed motor of the present application. Figure 1 and Figure 2 A low-interference brushed motor provided in the present application includes: a motor housing 1, a motor end cover 2, a circuit board 3, a drive unit 4 and an output shaft 5. The motor housing 1 is provided with an installation opening, and the motor end cover 2 can block the installation opening. The circuit board 3 is arranged on the motor end cover 2 and can be electrically connected to a controller of a working mechanism (the working mechanism can be an electric vehicle or other equipment that can use a low-interference brushed motor), and a plurality of electronic components are arranged on the circuit board 3. The drive unit 4 is arranged in the motor housing 1 and is transmission-connected to the output shaft 5. The output shaft 5 can be connected to the working mechanism and can provide power for the working mechanism (the working mechanism and the controller are not shown in the figure).

[0031] Through the above design, when assembling a low-interference brushed motor, workers can first integrate filter capacitors, chip inductors and other electronic components used to improve the electromagnetic compatibility performance of the motor, as well as sensors and controllers onto the circuit board 3, and then install the circuit board 3 on the motor end cover 2, so that there is no need to open corresponding installation slots for each electronic component on the motor housing 1 or the motor end cover 2, which can not only reduce the difficulty of assembling the motor, but also improve the utilization rate of the internal space of the motor, and ensure that the motor has enough filter capacitors, chip inductors and other electronic components that can improve the electromagnetic compatibility performance, so that the motor is not easily affected by external interference during operation and has good stability.

[0032] Figure 3 is a schematic cross-sectional view taken along the central axis of the output shaft of a low-interference brushed motor of the present application. Figure 2 and Figure 3 The drive unit 4 includes a stator 41 and a rotor 42. The stator 41 is arranged in the motor housing 1, and a coil is arranged on the inner side of the stator 41, and a magnetic steel matching the coil is arranged on the outer side of the rotor 42; a rotating groove 11 is also arranged on the inner wall of the motor housing 1, and one end of the output shaft 5 is inserted into the rotating groove 11 through a through hole opened on the motor end cover 2, and a worm 52 is arranged at one end of the shaft body of the output shaft 5 away from the rotating groove 11, so that the output shaft 5 can be connected to the working mechanism through the worm 52, so that the low-interference brush motor can output power to the outside; a bearing is arranged between the shaft body of the output shaft 5 and the groove wall of the rotating groove 11, and the rotor 42 is arranged between the bearing and the motor end cover 2, so that the output shaft 5 can rotate in the rotating groove 11 by setting the bearing.

[0033] See also Figure 2 and Figure 3 A Hall element (not shown in the figure) is provided on the circuit board 3, and a magnetic ring 51 compatible with the Hall element is sleeved on the output shaft 5, so that the rotation direction and rotation speed of the output shaft 5 and the rotor 42 can be measured through the cooperation of the magnetic ring 51 and the Hall element; a metal grounding piece 31 is also provided on the circuit board 3, and the motor casing 1 is made of metal. When the motor end cover 2 is connected to the motor casing 1, the grounding piece 31 can abut against the motor casing 1, so that the circuit board 3 can be grounded with the motor casing 1 through the grounding piece 31, thereby further improving the electromagnetic compatibility of the motor as a whole.

[0034] See also Figure 2 and Figure 3 A low-interference brushed motor also includes a plug 6 and a power cord 7. The plug 6 is provided on the motor end cover 2. One end of the power cord 7 is connected to the plug 6. The other end of the power cord 7 is electrically connected to the drive unit 4 and the circuit board 3. Through the above design, the drive unit 4 and the circuit board 3 can be connected to the power supply device and the controller through the plug 6 on the power cord 7, so that the power supply device can provide power to the drive unit 4 and the circuit board 3 through the power cord 7, and the controller can be electrically connected to the circuit board 3 through the power cord 7.

[0035] Specifically, a conductive column 71 can be set on the end of the power cord 7 away from the plug 6, and a positioning hole can be opened on the circuit board 3. The conductive column 71 can pass through the positioning hole and abut against the inner wall of the positioning hole, and the circuit board 3 can be electrically connected to the power cord 7 through the guide column, so that the circuit board 3 can be positioned by cooperating with the conductive column 71 and the positioning hole on the circuit board 3, so that workers can quickly disassemble and assemble the circuit board 3.

[0036] The working principle of a low-interference brushed motor in the present application is as follows:

[0037] The invention comprises a motor casing 1, a motor end cover 2, a circuit board 3, a drive unit 4 and an output shaft 5. The motor casing 1 is provided with an installation opening, and the motor end cover 2 can block the installation opening. The circuit board 3 is arranged on the motor end cover 2 and can be electrically connected to the controller of the working mechanism, and a plurality of electronic components are arranged on the circuit board 3. The drive unit 4 is arranged in the motor casing 1 and is transmission-connected to the output shaft 5, so that workers can first integrate filter capacitors, chip inductors and other electronic components used to improve the electromagnetic compatibility performance of the motor, as well as sensors and controllers, onto the circuit board 3, and then install the circuit board 3 onto the motor end cover 2, so that there is no need to open corresponding installation slots for each electronic component on the motor casing 1 or the motor end cover 2, which can reduce the difficulty of assembling the motor, and improve the utilization rate of the internal space of the motor, and ensure that the motor has enough filter capacitors, chip inductors and other electronic components that can improve the electromagnetic compatibility performance, so that the motor is not easily disturbed by the outside world during operation and has good stability.

[0038] It should be noted that the above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-interference brushed motor for providing power to a working mechanism, characterized in that: The invention comprises a motor housing (1), a motor end cover (2), a circuit board (3), a drive unit (4), an output shaft (5), a plug (6) and a power cord (7); the motor housing (1) is provided with a mounting opening, the motor end cover (2) is capable of blocking the mounting opening, the circuit board (3) is arranged on the motor end cover (2), and a plurality of electronic components are arranged on the circuit board (3); the drive unit (4) is arranged in the motor housing (1) and is transmission-connected to the output shaft (5); A plug (6) is arranged on the motor end cover (2); one end of the power line (7) is connected to the plug (6); the other end of the power line (7) is electrically connected to the drive unit (4); an end of the power line (7) away from the plug (6) is connected to a conductive column (71); a positioning hole is provided on the circuit board (3); the conductive column (71) can pass through the positioning hole and abut against the inner wall of the positioning hole; the circuit board (3) is electrically connected to the conductive column (71).

2. A low-interference brushed motor according to claim 1, characterized in that: The drive unit (4) comprises a stator (41) and a rotor (42), wherein the stator (41) is arranged in the motor housing (1), and a coil is arranged on the inner side of the stator (41), and a magnetic steel matching the coil is arranged on the outer side of the rotor (42), and one end of the output shaft (5) passes through a through hole provided on the motor end cover (2), is inserted into the motor housing (1), and is connected to the rotor (42).

3. A low-interference brushed motor according to claim 2, characterized in that: The circuit board (3) is provided with a Hall element, and the output shaft (5) is sleeved with a magnetic ring (51) that matches the Hall element.

4. A low-interference brushed motor according to claim 3, characterized in that: The circuit board (3) is also provided with a grounding piece (31), and when the motor end cover (2) is connected to the motor housing (1), the grounding piece (31) can abut against the motor housing (1).

5. A low-interference brushed motor according to claim 2, characterized in that: A rotation groove (11) is provided on the inner wall of the motor housing (1), one end of the output shaft (5) passes through a through hole provided on the motor end cover (2) and is inserted into the rotation groove (11), and a bearing is provided between the shaft body of the output shaft (5) and the groove wall of the rotation groove (11); The rotor (42) is located between the rotation groove (11) and the motor end cover (2).

6. A low-interference brushed motor according to claim 5, characterized in that: A worm (52) is provided on the shaft body of the output shaft (5) at one end away from the rotating groove (11).

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