Controller of motor driving circuit

Abstract

The utility model relates to the technical field of motor controllers, and particularly discloses a controller of a motor drive circuit, which comprises a shell, a through hole is arranged on the outer surface of the shell, control circuit boards are respectively arranged in the shell and on the outer surface of an end cover, and radiating ribs are arranged in the shell in a penetrating manner. When the controller of the motor driving circuit is installed, only the other control circuit board and the heat-conducting silica gel sheet need to be fixed on the outer surface of the end cover, then the control circuit board and the heat-conducting silica gel sheet are placed on the outer surfaces of the radiating ribs, and then the combined radiating ribs can be placed in the shell. And then, the end cover can be mounted, so that the column body can penetrate through the control circuit board and the heat-conducting silica gel sheet and abut against the heat dissipation ribs, the heat dissipation ribs can be tightly attached to the shell and fixed, the control circuit board can be pressed and fixed through the nut, assembly in a narrow space is not needed, and the control circuit board, the heat-conducting silica gel sheet and the heat dissipation ribs can be fixed and mounted conveniently.

Description

Technical Field

[0001] This utility model relates to the field of motor controller technology, specifically a controller for a motor drive circuit. Background Technology

[0002] A motor controller is a device used to control the operation of a motor. It is an integrated circuit device that controls and adjusts parameters such as the motor's running direction, speed, and torque through input signals to achieve precise control of the motor. It is widely used in industrial automation, robotics, electric vehicles, and home appliances. By precisely controlling the motor's operation, it improves the system's efficiency, accuracy, and reliability. However, existing motor controllers generally dissipate heat by conducting it to the casing. Heat conduction takes some time, which can lead to slow heat dissipation. Furthermore, the limited space inside the casing makes it very inconvenient to install the control circuitry. Utility Model Content

[0003] The purpose of this invention is to provide a controller for a motor drive circuit, so as to solve the problem of inconvenient installation due to the small internal space of the housing mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a controller for a motor drive circuit, comprising a housing, a through hole on the outer surface of the housing, an end cap fixedly mounted on one end of the outer surface of the housing, and a sealing gasket between the end cap and the housing; a control circuit board mounted on the inside of the housing and the outer surface of the end cap respectively; a heat dissipation fin interlaced inside the housing; and a pressing and fixing mechanism between the heat dissipation fin and the housing and the end cap, which facilitates the installation of the control circuit board and the heat dissipation fin, allowing the heat dissipation fin to extend directly out of the housing, thereby improving the efficiency of heat conduction during use.

[0005] Preferably, the extrusion fixing mechanism includes: a column, a nut threaded on the outer surface of the column, the outer surface of the nut being in contact with the outer surface of the control circuit board, a thermally conductive silicone sheet being attached to the outer surface of the control circuit board, the column being fixedly mounted on the outer surface of the end cap, the column passing through the control circuit board, a sealing gasket being provided between the outer surface of one end of the heat dissipation rib and the housing, and a heat dissipation fan being fixedly mounted on the outer surface of the housing near the heat dissipation rib, the outer surface of the heat dissipation fan being in contact with the side surface of the heat dissipation rib, and the outer surface of the heat dissipation rib being in contact with the outer surface of the column.

[0006] By adopting the above technical solution, the end cap can be installed to allow the column to be inserted between the control circuit boards. The pressure on the control circuit board can be adjusted by the nut, so that the control circuit board can be tightly attached to the thermally conductive silicone pad. The thermally conductive silicone pad makes the control circuit board and the heat dissipation fins fit even more tightly. The pressure of the column makes the heat dissipation fins fit tightly against the outer surface of the housing, so that the heat dissipation fins can be snapped into the interior of the housing. This facilitates the installation and fixation of the control circuit board with heat dissipation fins, and allows the heat dissipation fins to directly conduct heat to the outer surface of the housing. The heat dissipation fan dissipates heat from the heat dissipation fins, greatly improving the convenience of maintenance and assembly of the control circuit board, and allowing the heat generated during operation to be conducted out of the housing more quickly through the heat dissipation fins, improving the heat dissipation efficiency.

[0007] Preferably, the end of the heat dissipation rib located outside the housing is smaller than the other end of the heat dissipation rib, and the heat dissipation rib is generally tapered. A heat-conducting sheet is attached to the end of the heat dissipation rib located outside the housing, and the outer surface of the heat-conducting sheet is attached to the outer surface of the mounting surface.

[0008] By adopting the above technical solution, the heat dissipation area can be increased through the conical design of the heat dissipation fins, and the heat of the heat dissipation fins can also be conducted to the mounting surface through the heat-conducting sheet installed on the outer surface of the heat dissipation fins, thereby expanding the heat dissipation area and improving the heat dissipation efficiency.

[0009] Preferably, the column at the end of the end cap away from the cooling fan is shorter than the other end. Another thermally conductive silicone sheet is attached to the outer surface of the end cap, and another control circuit board is attached to the outer surface of the thermally conductive silicone sheet. The other control circuit board is passed through by the column, and the nut on the outer surface of the column is attached to the outer surface of the control circuit board. A heat sink is fixedly installed on the outer surface of the end cap, and the heat sink is located above the other thermally conductive silicone sheet.

[0010] Using the above technical solution, the control circuit board can be fixedly installed inside the end cover by the column and nut, and the thermally conductive silicone sheet can make the control circuit board and the end cover fit more tightly, so that heat can be conducted to the outer surface of the end cover. The heat sink increases the heat dissipation area, so that the control circuit board can operate stably.

[0011] Preferably, a fuse is snapped onto the outer surface of the control circuit board, a replacement cover is fixedly installed on the outer surface of the end cover, and a sealing gasket is provided between the replacement cover and the end cover, with the replacement cover located above the fuse.

[0012] By adopting the above technical solution, when a short circuit occurs, the replacement cover can be removed from the end cover, making it convenient to remove the fuse from the control circuit board and replace it without having to completely disassemble the end cover. This reduces the contact and pulling of the circuit and makes fuse replacement more convenient.

[0013] Preferably, a grounding pin is fixedly installed on the side surface of the housing, and the outer surface of the grounding pin is in contact with the mounting surface. One end of the grounding pin is higher than the other end of the heat dissipation fin. An elastic snap-fit ​​mechanism is provided between the grounding pin and the mounting surface, which facilitates the quick installation and removal of the housing.

[0014] By adopting the above technical solution, the housing can be quickly and easily installed and removed by inserting the grounding pin, which facilitates the disassembly and maintenance of the controller and reduces the time required for assembly and disassembly.

[0015] Preferably, the elastic locking mechanism includes: a fixing block, which is fixedly installed on the mounting surface, and pins are slidably installed on the outer surfaces of both ends of the fixing block, with one end of the pin engaging with the insertion foot; a spring is installed inside the fixing block, with both ends of the spring abutting against the outer surface of the pin; and a locking arc-shaped pin is threaded onto the outer surface of the mounting surface, with the outer surface of the locking arc-shaped pin engaging with the locking arc-shaped pin.

[0016] Using the above technical solution, the grounding pin can be inserted at an angle by snapping on the arc-shaped pin, and after the grounding pin is put down, it can be locked with the snapping on the arc-shaped pin. After the grounding pin is pressed down, the pin can retract into the interior of the fixing block, and the pin can be pushed by the spring to lock into the interior of the grounding pin and fix the controller. The pins set at both ends of the fixing block prevent the controller from falling off when a single pin is accidentally touched.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the controller of the motor drive circuit:

[0018] 1. During installation, simply place the control circuit board and thermal conductive silicone pad on the outer surface of the heat dissipation fins. Then, insert the assembled heat dissipation fins into the housing. After that, install the end caps so that the column can pass through the control circuit board and thermal conductive silicone pad and press against the heat dissipation fins. This allows the heat dissipation fins to fit tightly against the housing and be fixed in place. The nuts can then press and fix the control circuit board, ensuring that the control circuit board and thermal conductive silicone pad are in close contact with the outer surface of the heat dissipation fins. This facilitates the fixing and installation of the control circuit board, thermal conductive silicone pad, and heat dissipation fins. Furthermore, the direct heat conduction between the heat dissipation fins and the control circuit board can improve the speed of heat dissipation.

[0019] 2. The tapered design of the heat dissipation fins can expand the heat dissipation area of ​​the heat dissipation fins and allow the heat generated by the control circuit board during operation to be conducted to the outer surface of the mounting surface through the heat dissipation fins. The thermal conductive silicone sheet can make the heat dissipation fins fit more tightly with the mounting surface, improve the heat dissipation efficiency of the control circuit board, and enable the control circuit board to operate stably at a suitable temperature.

[0020] 3. After fixing the snap-fit ​​arc-shaped pin and the fixing block to the outer surface of the mounting surface, tilt the grounding pin and insert it into the snap-fit ​​arc-shaped pin. Then, as the housing is flattened, the grounding pin will engage with the snap-fit ​​arc-shaped pin. After the housing is flattened, the grounding pin will push the pin to move, and the pin will be reset by the push of the spring. The pin can automatically engage with the grounding pin as the housing is flattened. The pins at both ends of the fixing block prevent the housing from being removed from the mounting surface when the pin is pulled alone. This allows the fixing block and the pin to automatically engage during installation and reduces the risk of the housing falling off the mounting surface due to accidental contact. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the shell and end cap of this utility model;

[0022] Figure 2 This is a three-dimensional structural diagram of the heat dissipation fins and heat dissipation fan of this utility model;

[0023] Figure 3 This is a cross-sectional exploded perspective view of the end cap and replacement cap of this utility model.

[0024] Figure 4 This is a cross-sectional exploded three-dimensional structural diagram of the shell and heat dissipation fins of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the insertion pin and fixing block of this utility model;

[0026] Figure 6 This is a cross-sectional three-dimensional structural diagram of the fixing block and the snap-fit ​​arc-shaped nail of this utility model.

[0027] In the diagram: 1. Housing; 2. End cap; 3. Control circuit board; 4. Thermal conductive silicone sheet; 5. Column; 6. Nut; 7. Heat dissipation fin; 8. Adhesive thermal conductive sheet; 9. Cooling fan; 10. Heat sink; 11. Grounding pin; 12. Fuse; 13. Replacement cover; 14. Fixing block; 15. Pin; 16. Spring; 17. Snap-fit ​​arc pin. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-6This utility model provides a technical solution: a controller for a motor drive circuit, including a housing 1. The outer surface of the housing 1 has a through hole, and an end cap 2 is fixedly installed on one end of the outer surface of the housing 1. A sealing gasket is provided between the end cap 2 and the housing 1. A control circuit board 3 is installed inside the housing 1 and on the outer surface of the end cap 2, respectively. A heat dissipation fin 7 is inserted inside the housing 1. A pressing and fixing mechanism is provided between the heat dissipation fin 7 and the housing 1 and the end cap 2. The pressing and fixing mechanism facilitates the installation of the control circuit board 3 and the heat dissipation fin 7, allowing the heat dissipation fin 7 to extend directly out of the housing 1, so that heat can be efficiently conducted during use and the heat dissipation efficiency can be improved.

[0030] The controller can be sealed by installing the housing 1 and the end cap 2, so that water will not enter the controller and cause damage, and the heat absorbed by the heat dissipation fins 7 can be indirectly conducted to the inside of the housing 1 to increase the heat dissipation area.

[0031] The extrusion fixing mechanism includes: a column 5, a nut 6 threaded on the outer surface of the column 5, the outer surface of the nut 6 being in contact with the outer surface of the control circuit board 3, a thermally conductive silicone sheet 4 being attached to the outer surface of the control circuit board 3, the column 5 being fixedly installed on the outer surface of the end cap 2, the column 5 passing through the control circuit board 3, a sealing gasket being provided between the outer surface of one end of the heat dissipation rib 7 and the housing 1, and a heat dissipation fan 9 being fixedly installed on the outer surface of the housing 1 near the heat dissipation rib 7, the outer surface of the heat dissipation fan 9 being in contact with the side surface of the heat dissipation rib 7, and the outer surface of the heat dissipation rib 7 being in contact with the outer surface of the column 5.

[0032] When assembling the controller, the control circuit board 3 and the thermally conductive silicone pad 4 should first be placed on the outer surface of the heat dissipation fin 7. Then, the heat dissipation fin 7 should be placed inside the housing 1. After that, the end cap 2 can be installed on the outer surface of the housing 1, so that the nut 6 installed on the column 5 can press the control circuit board 3 tightly, making the control circuit board 3 and the thermally conductive silicone pad 4 fit more tightly. The heat from the control circuit board 3 can be directly conducted to the heat dissipation fin 7 through the thermally conductive silicone pad 4. The heat dissipation fin 7 can be fixed inside the housing 1 by the compression of the column 5, so that one end of the heat dissipation fin 7 can protrude from the housing 1. The directly protruding heat dissipation fin 7 can conduct heat to the outside of the housing 1 more quickly. The heat dissipation fan 9 dissipates heat from the heat dissipation fin 7, which facilitates the installation of the heat dissipation fin 7 and the control circuit board 3 while improving the heat dissipation efficiency.

[0033] The end of the heat dissipation rib 7 located outside the housing 1 is smaller than the other end of the heat dissipation rib 7, and the heat dissipation rib 7 is generally tapered. A heat-conducting sheet 8 is attached to the end of the heat dissipation rib 7 located outside the housing 1, and the outer surface of the heat-conducting sheet 8 is attached to the outer surface of the mounting surface.

[0034] The conical design of the heat dissipation fin 7 increases the heat dissipation area of ​​the heat dissipation fin 7 and allows the heat dissipation fin 7 to pass through the through hole of the housing 1 for installation. At the same time, by attaching the heat-conducting sheet 8, a portion of the temperature of the heat dissipation fin 7 can be conducted to the mounting surface to expand the heat dissipation area, ensuring the temperature of the controller during operation and enabling the controller to operate stably.

[0035] The column 5 at the end of the end cap 2 away from the cooling fan 9 is shorter than the other end. Another thermally conductive silicone pad 4 is attached to the outer surface of the end cap 2, and another control circuit board 3 is attached to the outer surface of the thermally conductive silicone pad 4. The other control circuit board 3 is passed through by the column 5, and the nut 6 on the outer surface of the column 5 is attached to the outer surface of the control circuit board 3. A heat sink 10 is fixedly installed on the outer surface of the end cap 2, and the heat sink 10 is located above the other thermally conductive silicone pad 4.

[0036] The control circuit board 3 can be fixedly installed on the outer surface of the end cover 2 by the column 5 and the nut 6, and the heat can be conducted to the outer surface of the end cover 2 by the thermally conductive silicone sheet 4. At the same time, the heat sink 10 increases the heat dissipation area, so that another control circuit board 3 can be conveniently fixed inside the end cover 2, and the other control circuit board 3 installed inside the end cover 2 can be cooled.

[0037] A fuse 12 is snapped onto the outer surface of the control circuit board 3, and a replacement cover 13 is fixedly installed on the outer surface of the end cover 2. A sealing gasket is provided between the replacement cover 13 and the end cover 2, and the replacement cover 13 is located above the fuse 12.

[0038] When the controller causes the fuse 12 to blow due to a short circuit, the replacement cover 13 can be removed from the end cover 2. Then, the fuse 12 can be removed from the control circuit board 3 using tools, and the new fuse 12 can be installed back into the control circuit board 3 using tools. This makes it convenient to replace and install the fuse 12 without removing the end cover 2, reducing the problems caused by the movement of the circuit when removing the end cover 2, and reducing the difficulty of sealing after reinstallation.

[0039] A grounding pin 11 is fixedly installed on the side surface of the housing 1, and the outer surface of the grounding pin 11 is in contact with the mounting surface. One end of the grounding pin 11 is higher than the other end of the heat dissipation fin 7. An elastic snap-fit ​​mechanism is provided between the grounding pin 11 and the mounting surface. The elastic snap-fit ​​mechanism facilitates the quick installation and removal of the housing 1.

[0040] The controller can be easily installed and removed by plugging in the grounding pin 11, allowing for quick removal of the controller during maintenance, replacement, and installation without the need for tools, thus reducing the difficulty of disassembly.

[0041] The elastic snap-fit ​​mechanism includes: a fixing block 14, which is fixedly installed on the mounting surface, and pins 15 are slidably installed on the outer surfaces of both ends of the fixing block 14, with one end of the pins 15 engaging with the insertion foot 11; a spring 16 is installed inside the fixing block 14, with both ends of the spring 16 abutting against the outer surface of the pins 15; and a snap-fit ​​arc-shaped nail 17 is threaded onto the outer surface of the mounting surface, with the outer surface of the snap-fit ​​arc-shaped nail 17 engaging with the snap-fit ​​arc-shaped nail 17.

[0042] After installing the snap-fit ​​arc-shaped pin 17 and the fixing block 14 onto the mounting surface, the housing 1 can be lifted up, and the insertion pin 11 can be tilted and inserted into the snap-fit ​​arc-shaped pin 17. As the housing 1 is laid flat, the insertion pin 11 at the other end of the housing 1 can push the pin 15 to move. After the insertion pin 11 moves into place, the spring 16 can push the pin 15 to reset, so that the pin 15 can engage with the insertion pin 11. The pins 15 at both ends of the fixing block 14 prevent the housing 1 from falling off the mounting surface when one end of the pin 15 is touched, reducing the probability of the housing 1 falling off due to accidental contact.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A controller for a motor drive circuit, comprising a housing (1), wherein a through hole is provided on the outer surface of the housing (1), and an end cap (2) is fixedly mounted on the outer surface of one end of the housing (1), and a sealing gasket is provided between the end cap (2) and the housing (1), wherein a control circuit board (3) is respectively mounted on the interior of the housing (1) and the outer surface of the end cap (2), characterized in that: The housing (1) is provided with heat dissipation ribs (7) inserted inside. A pressing and fixing mechanism is provided between the heat dissipation ribs (7), the housing (1), and the end cap (2). The pressing and fixing mechanism facilitates the installation of the control circuit board (3) and the heat dissipation ribs (7), so that the heat dissipation ribs (7) can directly extend out of the housing (1).

2. The controller for a motor drive circuit according to claim 1, characterized in that: The extrusion fixing mechanism includes: a column (5), a nut (6) is threaded on the outer surface of the column (5), and the outer surface of the nut (6) is in contact with the outer surface of the control circuit board (3). A thermally conductive silicone sheet (4) is attached to the outer surface of the control circuit board (3). The column (5) is fixedly installed on the outer surface of the end cap (2). The column (5) passes through the control circuit board (3). A sealing gasket is provided between the outer surface of one end of the heat dissipation rib (7) and the housing (1). A heat dissipation fan (9) is fixedly installed on the outer surface of the housing (1) near the heat dissipation rib (7). The outer surface of the heat dissipation fan (9) is in contact with the side surface of the heat dissipation rib (7). The outer surface of the heat dissipation rib (7) is in contact with the outer surface of the column (5).

3. The controller for a motor drive circuit according to claim 1, characterized in that: The heat dissipation rib (7) is located outside the shell (1) at one end smaller than the other end of the heat dissipation rib (7), and the heat dissipation rib (7) is generally tapered. A heat-conducting sheet (8) is attached to the end of the heat dissipation rib (7) located outside the shell (1), and the outer surface of the heat-conducting sheet (8) is attached to the outer surface of the mounting surface.

4. The controller for a motor drive circuit according to claim 1, characterized in that: The column (5) at the end of the end cap (2) away from the heat dissipation fan (9) is shorter than the other end. Another thermally conductive silicone sheet (4) is attached to the outer surface of the end cap (2), and another control circuit board (3) is attached to the outer surface of the thermally conductive silicone sheet (4). The other control circuit board (3) is passed through the column (5), and the nut (6) on the outer surface of the column (5) is attached to the outer surface of the control circuit board (3). A heat sink (10) is fixedly installed on the outer surface of the end cap (2), and the heat sink (10) is located above the other thermally conductive silicone sheet (4).

5. The controller for a motor drive circuit according to claim 1, characterized in that: A fuse (12) is snapped onto the outer surface of the control circuit board (3), and a replacement cover (13) is fixedly installed on the outer surface of the end cover (2). A sealing gasket is provided between the replacement cover (13) and the end cover (2), and the replacement cover (13) is located above the fuse (12).

6. The controller for a motor drive circuit according to claim 1, characterized in that: The side surface of the housing (1) is fixedly installed with a grounding pin (11), and the outer surface of the grounding pin (11) is in contact with the mounting surface. One end of the grounding pin (11) is higher than the other end of the heat dissipation fin (7). An elastic snap-fit ​​mechanism is provided between the grounding pin (11) and the mounting surface. The elastic snap-fit ​​mechanism facilitates the quick installation and removal of the housing (1).

7. A controller for a motor drive circuit according to claim 6, characterized in that: The elastic snap-fit ​​mechanism includes: a fixing block (14), which is fixedly installed on the mounting surface, and pins (15) are slidably installed on the outer surfaces of both ends of the fixing block (14), and one end of the pin (15) is engaged with the insertion foot (11). A spring (16) is installed inside the fixing block (14), and both ends of the spring (16) are in contact with the outer surface of the pin (15). A snap-fit ​​arc-shaped nail (17) is threaded on the outer surface of the mounting surface, and the outer surface of the snap-fit ​​arc-shaped nail (17) is engaged with the snap-fit ​​arc-shaped nail (17).

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