Motor control unit convenient to disassemble and replace

Abstract

The present invention relates to a motor control unit for a DC motor of an electrical device, and specifically relates to a motor control unit convenient to disassemble and replace, comprising: a control unit; the PCB module is provided with a potting area and a mounting area adjacent to the potting area; the socket module is fixedly installed in the installation area of the PCB module, and the control unit is detachably installed on the socket module; the connection module is used for establishing a signal connection between the control unit and the PCB module or establishing a signal and power supply connection between the control unit and the PCB module, so that the PCB module receives a signal and / or power input by the control unit, thereby controlling the signal and / or power of the DC motor; the socket module comprises a separation component, and the separation component is configured to be used for separating a potting area and a mounting area of the PCB module at an adjacent position, so that glue cannot flow into the mounting area when the potting area of the PCB module is subjected to glue pouring.

Description

Technical Field

[0001] The invention relates to a motor control unit of a DC motor used in electrical equipment, and in particular to a motor control unit which is easy to disassemble and replace. Background Art

[0002] At present, brushless DC motors are becoming more and more popular in power tools or household appliances. Existing brushless DC motor control units include two main components: a control unit for signal and / or power input, and a PCB module for controlling power and signals. The entire assembly of the control unit and the PCB module inside the power tool is connected by wires. With this method, the contact system is easily replaced only in case of subsequent wear. However, additional voltage drops are introduced, which reduces the efficiency of the system and makes the power tool assembly more complicated, with the possibility of squeezing the wires and extending the assembly time.

[0003] For the above reasons, some brushless DC motor control units integrate the control unit and PCB module into a single PCB, thereby saving space within the power tool. However, this approach has a disadvantage that if the entire brushless DC motor control unit has no other defects, the entire integrated PCB must be replaced in the event of wear of the control unit contacts, increasing maintenance costs compared to traditional solutions.

[0004] The Chinese utility model patent with application number 201720288356.9 discloses an electric tool, including a housing and a tool assembly assembled in the housing, the tool assembly including a power supply assembly and a motor assembly, the housing including a handle portion with a handle cavity formed by assembly, the tool assembly also including a circuit board assembly assembled in the handle cavity, the circuit board assembly including a circuit board electrically connected to the power supply assembly and the motor assembly and a metal plate that is thermally conductive with the circuit board and arranged approximately parallel, the inner surface of the metal plate has a recess, and the circuit board is accommodated in the recess in the thickness direction. It is further disclosed that: the circuit board assembly also includes a switch fixed to the metal plate corresponding to the control part and elastically protruding from the handle portion. The switch is a signal switch, and the switch is electrically connected to the control part through a connector. The design of the switch being directly assembled on the high-strength metal plate increases the stability and pressure-bearing strength of the switch as a movable part, and the switch as a whole is mounted on the metal plate by a buckle, combined with the design of realizing electrical connection through a connector, it has better installation and replaceability. Of course, in some other cases, the electrical connection between the switch and the control part can also be achieved through a cable or other forms. This patent provides convenience for the assembly of the switch, but in order to reduce the impact of external vibration on the circuit board, after the circuit board is placed in the depression of the metal plate, it is necessary to fill the sealing glue covering the circuit board. At this time, the switch is packaged together with the circuit board and the metal plate, which is also inconvenient to disassemble and replace the switch.

[0005] Application No. 201820640007.3 discloses an electric tool with an integrated circuit board, comprising an electric tool and a circuit board. The electric tool comprises one or more components, and the component or components are fixed on the circuit board, and the circuit board is electrically connected to other components or circuit units. The component arranged on one side of the circuit board is a switch. Preferably, the switch is a stepless speed switch, and is a plug-in stepless speed switch, that is, the stepless speed switch has a row of pins, and the pins are inserted into the fixing holes of the circuit board and welded, that is, fixed to the circuit board through plug-in packaging technology, so that it can be packaged through machinery and equipment, so there is no need to use wires, and no manual welding is required. This patent also makes it inconvenient to disassemble and replace the switch by welding the pins of the switch to the circuit board, and the switch is only connected to the circuit board through the pins, which is easily affected by external vibrations. Summary of the invention

[0006] The present invention aims to alleviate at least one of the above problems.

[0007] The invention may be embodied in several broad forms. Embodiments of the invention may include one or any combination of the different broad forms described herein.

[0008] In a first broad form, the present invention provides a motor control unit for controlling the operation of a DC motor of an electrical device that is easily removable and replaceable, the motor control unit comprising: Control unit; A PCB module, the PCB module having a potting area and a mounting area adjacent to the potting area; A socket module, the socket module is fixedly mounted to the mounting area of ​​the PCB module, and the control unit is detachably mounted to the socket module; A connection module, used to establish a signal connection between the control unit and the PCB module, or to establish a signal and power connection between the control unit and the PCB module, so that the PCB module receives the signal and / or power input by the control unit, thereby controlling the signal and / or power of the DC motor; The socket module includes a partition member, which is configured to separate the potting area of ​​the PCB module from the mounting area at adjacent locations, so that glue will not flow into the mounting area when the potting area of ​​the PCB module is potted with glue.

[0009] Preferably, the socket module comprises a three-dimensional closed loop structure having a first opening surface, and the control unit comprises a shell, at least a portion of which is inserted into the socket module through the first opening surface.

[0010] Preferably, the first opening surface is configured on the side of the socket module, and at least a portion of the shell of the control unit is inserted into the socket module through the first opening surface along the X-axis or Y-axis direction; or, the first opening surface is configured on the top surface of the socket module, and at least a portion of the shell of the control unit is inserted into the socket module through the first opening surface along the Z-axis direction.

[0011] Preferably, the control unit comprises a speed control member, at least part of which is located outside the housing, and the socket module is provided with a second opening surface matching with the part of the speed control member located outside the housing.

[0012] Preferably, the second opening surface coincides with the first opening surface.

[0013] Preferably, the control unit comprises a reversing control member, at least part of which is located outside the housing, and the socket module is provided with a third opening surface matching with the part of the reversing control member located outside the housing.

[0014] Preferably, the third opening surface coincides with the first opening surface.

[0015] Preferably, at least one first locking member is arranged between the control unit and the socket module, the first locking member being configured to securely but releasably interconnect the housing of the control unit and the socket module.

[0016] Typically, the first locking member comprises a quick release member configured for quickly releasing the first locking member.

[0017] Preferably, at least one first guide member is arranged between the control unit and the socket module, and the first guide member is configured to enable the housing of the control unit to be correctly installed in the socket module.

[0018] Preferably, an elastic member is arranged between the control unit and the socket module, and the elastic member is configured to reduce the relative movement between the housing of the control unit and the socket module and prevent particles, dust and water from entering the PCB module through the socket module.

[0019] Preferably, at least one second locking member is arranged between the socket module and the PCB module, the second locking member being configured to securely but releasably interconnect the socket module and the PCB module.

[0020] Preferably, at least one second guide member is arranged between the socket module and the PCB module, and the second guide member is configured to enable the socket module to be correctly installed in the installation area of ​​the PCB module.

[0021] Preferably, the socket module is detachably connected to the mounting area of ​​the PCB module.

[0022] In another preferred embodiment, the socket module and the PCB module are integrated into one.

[0023] Preferably, the potting area of ​​the PCB module is covered with glue to reduce the impact of external vibration on the PCB module and prevent particles, dust and water from contaminating the electronic components inside the PCB module.

[0024] Preferably, the connection module comprises a signal connection member for establishing a signal connection between the control unit and the PCB module.

[0025] Typically, the signal connection member adopts any one of a pin header connector, a PCB edge connector, a USB connector, a pogo pin connector, and a spring loaded connector.

[0026] Preferably, the connection module further comprises a power connection member for establishing a power connection between the control unit and the PCB module.

[0027] Typically, the power connection member is any one of a clip connector, a socket connector, and a pin header connector.

[0028] Another preferred embodiment is that a connecting member extends from a housing surface of the control unit, and the connecting module comprises a signal connecting member for establishing a signal connection between the connecting member of the control unit and the PCB module.

[0029] Preferably, the connection module further comprises a power connection member for establishing a power connection between the connection member of the control unit and the PCB module.

[0030] In a second broad form, the invention provides a motor control unit for controlling the operation of a DC motor of an electrical device that is easily removable and replaceable, the motor control unit comprising: Control unit; A PCB module, the PCB module having a potting area and a mounting area adjacent to the potting area; The isolation module is configured to be detachably mounted on the mounting area of ​​the PCB module when the potting area of ​​the PCB module is potted with glue, so that the potting area and the mounting area of ​​the PCB module are separated at an adjacent position; when the glue of the potting area of ​​the PCB module is cured, the isolation module is configured to be removed from the mounting area of ​​the PCB module, so that the control unit can be detachably mounted on the mounting area of ​​the PCB module; A connection module is used to establish a signal connection between the control unit and the PCB module, or to establish a signal and power connection between the control unit and the PCB module, so that the PCB module receives the signal and / or power input by the control unit, thereby controlling the signal and / or power of the DC motor.

[0031] Preferably, at least one first locking member is arranged between the control unit and the mounting area of ​​the PCB module, the first locking member being configured to securely but releasably interconnect the housing of the control unit and the mounting area of ​​the PCB module.

[0032] Preferably, the first locking member comprises a quick release member configured to quickly release the first locking member.

[0033] Preferably, at least one first guide member is arranged between the control unit and the mounting area of ​​the PCB module, and the first guide member is configured to enable the housing of the control unit to be correctly mounted to the mounting area of ​​the PCB module.

[0034] Preferably, the potting area of ​​the PCB module is covered with glue to reduce the impact of external vibration on the PCB module and prevent particles, dust and water from contaminating the electronic components inside the PCB module.

[0035] Preferably, the connection module comprises a signal connection member for establishing a signal connection between the control unit and the PCB module.

[0036] Typically, the signal connection member adopts any one of a pin header connector, a PCB edge connector, a USB connector, a pogo pin connector, and a spring loaded connector.

[0037] Preferably, the connection module further comprises a power connection member for establishing a power connection between the control unit and the PCB module.

[0038] Typically, the power connection member is any one of a clip connector, a socket connector, and a pin header connector.

[0039] In another broad form, the present invention provides an electrical device comprising an electrical switch as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The present invention will be more fully understood from the following detailed description of preferred but non-limiting embodiments of the present invention described in conjunction with the accompanying drawings, in which: Figure 1A-1B The three-dimensional view and the front view of the motor control unit of the first embodiment of the present application are respectively shown. The motor control unit includes a control unit, a PCB module, a socket module and a connection module, wherein Figure 1B The shaded area indicates the potting area.

[0041] Figure 2A-2C The three-dimensional diagrams of the motor control unit before, during and after assembly of the first embodiment of the present application are respectively shown. The socket module is first assembled in the mounting area on the PCB module, and then the control unit is assembled in the socket module. Figure 2AThe dotted line shows the installation area.

[0042] Figure 3A-3B The three-dimensional diagrams of another embodiment of the motor control unit of the present application before and during assembly are shown respectively, and the three-dimensional diagram after assembly is shown in FIG. Figure 2C Similarly, the socket module is first assembled in the mounting area on the PCB module, and then the control unit is assembled in the socket module. Figure 3A The dotted line shows the installation area.

[0043] Figure 4 The three-dimensional diagrams of the control unit of the first embodiment of the present application are respectively shown, and the insertion surface of the control unit is configured with a conductive spring sheet and a conductive socket.

[0044] Figures 5A-5C The following diagrams respectively show the assembly method of the control unit and the PCB module of the first embodiment of the present application, wherein: Figure 5A To install along the X-axis direction, Figure 5B To install along the Y-axis direction, Figure 5C For installation along the Z-axis direction, in 5A-5C, it can be installed or disassembled in the positive direction according to the solid arrow direction, and can also be installed or disassembled in the reverse direction according to the dotted arrow direction.

[0045] Figures 6A-6F The signal connection diagrams of the control unit and the PCB module of the first embodiment of the present application are respectively shown, wherein: Fig. 6A To use a pin header connector, Figure 6B To use PCB edge connector, Figure 6C-6D To use the pogo pin connector, Figure 6E-6F A spring loaded connector is used.

[0046] Figures 7A-7D The power connection diagrams of the control unit and the PCB module of the first embodiment of the present application are respectively shown, wherein: Fig. 7A To use a clip connector, Figure 7B To use a socket connector, Figure 7C To use a pin header connector, Fig.7D Use wire + connector.

[0047] Figure 8 This is a stereoscopic diagram of an alternative embodiment of the motor control unit of the present application, wherein a connecting member extends from the housing surface of the control unit, and a signal connecting member and a power connecting member are disposed between the connecting member of the control unit and the PCB module.

[0048] Figures 9A-9B The three-dimensional view and exploded view of the motor control unit of the second embodiment of the present application are respectively shown. The motor control unit includes a control unit, a PCB module, a socket module and a connection module, and the socket module is integrated in the PCB module.

[0049] Fig.10 A stereoscopic diagram of a PCB module and a socket module according to a second embodiment of the present application is shown, wherein the socket module is integrated with the PCB module.

[0050] Fig.11 The three-dimensional diagram of the control unit of the second embodiment and the third embodiment of the present application is shown, and the insertion surface of the control unit is configured with guide pillars.

[0051] Figures 12A-12B The three-dimensional view and exploded view of the motor control unit of the third embodiment of the present application are respectively shown. The motor control unit includes a control unit, a PCB module and a connection module.

[0052] Figures 13A-13B The three-dimensional view and exploded view of the PCB module and the isolation module of the third embodiment of the present application are respectively shown. When glue is poured in the potting area of ​​the PCB module, the isolation module can be detachably installed in the installation area of ​​the PCB module to prevent the glue from flowing into the installation area; when the glue in the potting area of ​​the PCB module is cured, the isolation module is removed from the installation area of ​​the PCB module, and the control unit is detachably installed in the installation area of ​​the PCB module.

[0053] Fig.14 A three-dimensional diagram of a PCB module according to a third embodiment of the present application is shown. DETAILED DESCRIPTION

[0054] The preferred embodiment of the present application will be described in detail with reference to FIGS. 1 to 3. Fig.14 Described. Embodiments include motor control units for use with power tools, including, for example, electric drills, grinders, sanders, saws, rotary drive tools, and the like. It should be appreciated and understood that, although the present embodiment is described as being used with a power tool, this is merely for the purpose of illustrating functionality, and alternative embodiments of the present application may certainly be used with other types of electrical devices, such as electric gardening tools. Furthermore, although the embodiments of the present application described herein refer to electrical devices that include motors, it should be understood that alternative embodiments of the present application may also be applicable to electrical devices that include solenoid-type electromechanical units to achieve operable movement (e.g., reciprocating movement) of the electrical device.

[0055] like Figure 1A-1B , Figure 2A-2C and Figure 4The first embodiment of the motor control unit of the present application that is easy to disassemble and replace is shown, which is used to control the operation of the DC motor of the electrical equipment. The motor control unit includes: a control unit 110; a PCB module 120, the PCB module 120 has a potting area 120B and a mounting area 120A adjacent to the potting area 120B; a socket module 130, the socket module 130 is fixedly mounted to the mounting area 120A of the PCB module 120, and the control unit 110 is detachably mounted to the socket module 130; a connection module, which is used to establish a signal connection between the control unit 110 and the PCB module 120, or, The socket module 130 is used to establish a signal and power connection between the control unit 110 and the PCB module 120, so that the PCB module 120 receives the signal and / or power input by the control unit 110, thereby controlling the signal and / or power of the DC motor; wherein the socket module 130 includes a partition member 130A, and the partition member 130A is configured to separate the potting area 120B of the PCB module 120 from the mounting area 120A at an adjacent position, so that when the potting area 120B of the PCB module 120 is potted with glue, the glue will not flow into the mounting area 120A, and a fence is provided for the potting glue of the PCB module 120. Specifically, the PCB module 120 includes a PCB 120C and a bottom shell 120D, and the PCB 120C is assembled in the bottom shell 120D. The bottom shell 120D has a side wall extending upward from the edge of the potting area 120B corresponding to the bottom shell 120D, and a fence is provided for the potting of the PCB 120C. In this embodiment, the outer shape of the socket module 130 matches the shape of the housing 110A of the control unit 110, and is a square structure. When the socket module 130 is assembled in the middle of the PCB module 120, the partition member 130A is configured as a four-sided enclosure; when one side of the socket module 130 is located at the edge of the PCB module 120, the partition member 130A is configured as a three-sided enclosure; when two sides of the socket module 130 are located at the edge of the PCB module 120, the partition member 130A is configured as a two-sided enclosure; when three sides of the socket module 130 are located at the edge of the PCB module 120, the partition member 130A is configured as a one-sided enclosure; in short, the partition member 130A is configured at the connection between the installation area 120A and the potting area 120B of the PCB module 120, and is used to separate the potting area 120B and the installation area 120A of the PCB module 120 at adjacent locations. The height of each surface of the partition member 130A can be reasonably set as needed. It should be noted that the height of each surface of the partition member 130A needs to be slightly higher than the surface of the PCB module 120 after glue filling; of course, the height of a certain surface of the partition member 130A can also be equal to the height of the socket module 130 as needed.

[0056] like Figure 2A-2CAs shown, the socket module 130 includes a three-dimensional closed loop structure having a first opening surface 130B, and the control unit 110 includes a housing 110A, and at least a portion of the housing 110A is inserted into the socket module 130 through the first opening surface 130B. In this embodiment, the first opening surface 130B is configured on the top surface of the socket module 130, and at least a portion of the housing 110A of the control unit 110 is inserted into the socket module 130 through the first opening surface 130B along the Z-axis direction; of course, as a potential design change, the assembly direction of the control unit 110 may also be allowed to be in the opposite direction, such as Figure 5C As shown in the dashed line direction, at this time, the first opening surface 130B is configured on the bottom surface of the socket module 130. Optionally, in other embodiments, the first opening surface 130B can also be configured on the right side of the socket module 130, and at least a portion of the housing 110A of the control unit 110 is inserted into the socket module 130 through the first opening surface 130B along the X-axis direction. Figure 5A Of course, as a potential design change, the assembly direction of the control unit 110 may also be allowed to be in the opposite direction, such as Figure 5A As shown in the dashed line direction, at this time, the first opening surface 130B is configured on the left side of the socket module 130. Alternatively, the first opening surface 130B can also be configured on the rear side of the socket module 130, and at least a portion of the housing 110A of the control unit 110 is inserted into the socket module 130 through the first opening surface 130B along the Y-axis direction. Figure 5B Of course, as a potential design change, the assembly direction of the control unit 110 may also be allowed to be in the opposite direction, such as Figure 5B As shown by the dotted line, at this time, the first opening surface 130B is configured on the front side of the socket module 130 .

[0057] refer to Figure 2A-2C, the control unit 110 includes a speed control member, at least part of which is located outside the housing 110A, and the socket module 130 is configured with a second opening surface 130C that matches the part of the speed control member located outside the housing 110A. Specifically, the speed control member includes an actuator (not shown) located inside the housing 110A, a trigger 110B located outside the housing 110A, and an actuator shaft 110C connected between the actuator and the trigger 110B, and the second opening surface 130C facilitates the accommodation of the actuator shaft 110C. In other embodiments, the second opening surface 130C can overlap with the first opening surface 130B, that is, the installation direction of the actuator shaft 110C and the trigger 110B is opposite to the direction in which the housing 110A is inserted into the socket module 130. The control unit 110 may further include a reversing control member, at least part of which is located outside the housing 110A, and the socket module 130 is provided with a third opening surface 130D that matches the part of the reversing control member located outside the housing 110A. In other embodiments, the third opening surface 130D may overlap with the first opening surface 130B. Specifically, the reversing control member includes a reversing member 110D located outside the housing 110A, and the reversing member 110D may be a steering wheel or a reversing rod, and the third opening surface 130D facilitates the accommodation of the reversing member 110D. In other embodiments, the third opening surface 130D may overlap with the first opening surface 130B, that is, the installation direction of the reversing member 110D is opposite to the direction in which the housing 110A is inserted into the socket module 130.

[0058] The connection module is a medium that connects two or more objects together, such as a socket, jack, terminal, wiring harness, etc. It generally refers to all connection elements and their accessories used in electronic signals and power supplies. It builds a bridge of communication between blocked parts in the circuit or isolated circuits, so that current can flow and the circuit can achieve the predetermined function. In this embodiment, the connection module includes a signal connection component 140 for establishing a signal connection between the control unit 110 and the PCB module 120. There are many ways to establish a signal connection between the PCB module 120 and the control unit 110, so the signal connection component 140 can be used as follows: Fig. 6A The pin header connector shown in Figure 6B PCB edge connectors as shown, Figure 6C-6D The pogo pin connector shown in Figure 6E-6F Spring loaded connectors as shown, Figure 8 The USB connector shown in the figure or other means for signal transmission. In this embodiment, as Figure 2A-2B and Figure 4As shown, the signal connection component 140 includes a plurality of conductive pads 140A integrally formed on the PCB module 120 and a plurality of conductive springs 140B arranged on the housing 110A of the control unit 110 and corresponding one-to-one to the plurality of conductive pads 140A. A first through hole 130E is provided at the bottom of the socket module 130 corresponding to the position of the conductive spring 140B for the conductive spring 140B to pass through. When the housing 110A of the control unit 110 is assembled to the PCB module 120, the plurality of conductive springs 140B at the bottom of the housing 110A of the control unit 110 pass through the first through hole 130E at the bottom of the socket module 130 and abut against and conduct with the corresponding conductive pads 140A on the PCB module 120. The connection module may also include a power connection component 150 for establishing a power connection between the control unit 110 and the PCB module 120. There are a variety of methods for establishing a power connection between the PCB module 120 and the control unit 110, so the power connection component 150 may be used as follows: Fig. 7A The clip connector shown, Figure 7B The socket connector shown, Figure 7C The pin header connector shown in Fig.7D The wires + connectors shown or other means for power transmission. In this embodiment, as Figure 2A-2B and Figure 4 As shown, the power connection component 150 includes two conductive plugs 150A integrally formed on the socket module 130 and two conductive sockets 150B configured on the housing 110A of the control unit 110 and corresponding to the two conductive plugs 150A. The conductive plug 150A passes through the bottom of the socket module 130 through the conductive pin 150C at the bottom thereof and is connected to the socket 120F on the PCB module 120; when the housing 110A of the control unit 110 is assembled to the PCB module 120, the top of the conductive plug 150A on the socket module 130 is plugged into and connected with the corresponding conductive socket 150B at the bottom of the housing 110A of the control unit 110, and the bottom of the conductive plug 150A on the socket module 130 is connected and connected with the PCB module 120. In another embodiment, as Figure 3A-3B As shown, two conductive plugs 150A are arranged on the PCB module 120, and the conductive plugs 150A are connected to the sockets 120F on the PCB module 120 through the conductive pins 150C at the bottom thereof, and a second through hole 130F is provided at the bottom of the socket module 130 corresponding to the conductive plugs 150A, through which the conductive plugs 150A can pass; when the housing 110A of the control unit 110 is assembled to the PCB module 120, the conductive plugs 150A on the PCB module 120 are plugged and connected with the corresponding conductive sockets 150B at the bottom of the housing 110A of the control unit 110. Optionally, the second through hole 130F can be connected with the first through hole 130E to form an integral through hole.

[0059] In certain embodiments, such as Figure 8 As shown, a connection member 110E extends from the surface of the housing 110A of the control unit 110, and the connection module includes a signal connection member 140 for establishing a signal connection between the connection member 110E of the control unit 110 and the PCB module 120. Optionally, the connection module also includes a power connection member 150 for establishing a power connection between the connection member 110E of the control unit 110 and the PCB module 120. The connection member 110E can extend from the side or other surface of the control unit 110, and the connection member 110E is configured to provide one or more electrical connections for transmitting signals and power supply, which is specifically implemented through one or more connectors.

[0060] like Figure 2A-2C As shown, in order to firmly assemble the control unit 110 and the socket module 130 together, at least one first locking member is configured between the control unit 110 and the socket module 130 so that the housing 110A of the control unit 110 and the socket module 130 are firmly but releasably interconnected. The first locking member may include, but is not limited to, snap fit, screws, clips, or other known fastening devices. In this embodiment, as shown in FIG. Figure 2A As shown, the first locking member includes a card block 130G configured on the socket module 130 and a card slot 110F configured on the control unit 110. When the housing 110A of the control unit 110 is inserted into the socket module 130, the card block 130G is inserted into the corresponding card slot 110F to achieve a firm assembly of the control unit 110 and the socket module 130. The number of the card block 130G and the card slot 110F can be reasonably set as needed, such as one, two or more than two. In this embodiment, the number of the card block 130G and the card slot 110F are both two. In some embodiments, the first locking member may further include a quick release member to quickly release the first locking member to release the lock. The quick release member may be a convex piece, a button or a lever, etc., which allows the control unit 110 to be removed from the socket module 130 without tools or with minimal tool assistance by hand or with a simple hand tool. The use of the first locking member enables the control unit 110 to be stably and reliably fastened to its associated socket module 130 under normal operating conditions. However, the optional quick release feature of the first locking member also facilitates easy removal of the control unit 110 when maintenance, repair or replacement is required. Therefore, in standard use scenarios, the first locking member presents a strong and reliable bond, but can be quickly removed when necessary without damaging the components. In order to allow the control unit 110 to be properly aligned, at least one first guide member is configured between the control unit 110 and the socket module 130 so that the housing 110A of the control unit 110 can be properly installed in the socket module 130. In this embodiment, as shown in FIG. Figure 2AAs shown, the first guide member includes a guide block 110G disposed on the side wall of the control unit 110 and a guide groove 130H disposed in the socket module 130 and matched with the guide block 110G. The guide block 110G is aligned with the guide groove 130H and inserted along the guide groove 130H, so that the housing 110A of the control unit 110 can be correctly installed in the socket module 130. The number of the guide block 110G and the guide groove 130H can be reasonably set as needed, such as one, two or more than two, etc. In this embodiment, the number of the guide block 110G and the guide groove 130H are both two. The shape of the guide block 110G and the guide groove 130H can be reasonably set as needed, such as a triangle, a square, a trapezoid, a T-shaped, an I-shaped, etc., as long as the housing 110A of the control unit 110 can be correctly installed in the socket module 130. In order to achieve dustproof sealing and anti-vibration functions, an elastic member 130I is configured as an interface between the control unit 110 and the socket module 130, which can eliminate assembly tolerance, thereby reducing the relative movement between the housing 110A of the control unit 110 and the socket module 130, and improving contact wear. In this embodiment, the elastic member 130I is in the shape of an annular structure, which cooperates with the bottom inner wall of the socket module 130 to reduce the relative movement between the relative components of the assembly.

[0061] The socket module 130 can be fixed to the PCB module 120 by welding or an appropriate connection method, which makes it flexible and can be customized for different types of control units 110. The use of the socket module 130 can make it easier to maintain, replace or upgrade the control unit 110 without replacing the entire motor control unit 110, thereby saving time and cost. In the present embodiment, the socket module 130 is detachably mounted to the mounting area 120A of the PCB module 120. Optionally, the socket module 130 can be mounted to the mounting area 120A of the PCB module 120 by snapping, buckling, screwing or plugging. In the present embodiment, as Figure 2AAs shown, at least one second locking member is arranged between the socket module 130 and the PCB module 120, so that the socket module 130 and the PCB module 120 are firmly but releasably interconnected. Specifically, the second locking member includes a hook 130J arranged on the socket module 130 and a hole 120E arranged on the PCB module 120. When the socket module 130 is assembled to the PCB module 120, the hook 130J is inserted into the corresponding hole 120E to achieve a firm assembly of the socket module 130 and the PCB module 120. The number of the hooks 130J and the hole 120E can be reasonably set as needed, such as one, two or more than two. In this embodiment, the number of the hooks 130J and the hole 120E are both four. It should be understood that the socket module 130 can also be fixed to the PCB module 120 by other means such as welding, riveting, bonding or crimping. In other embodiments, in order to properly align the socket module 130, at least one second guide member is disposed between the socket module 130 and the PCB module 120, and the second guide member is configured to properly install the socket module 130 in the installation area 120A of the PCB module 120. Alternatively, the second guide member may be in the form of a first guide member, and in this embodiment, the second locking member may function as the second guide member, so that the socket module 130 may be properly installed on the PCB module 120.

[0062] In some embodiments, if the power tool is of a type that may be subject to high vibrations during use, glue (such as silicone, epoxy resin glue, or polyurethane resin, etc.) may be used to encapsulate the PCB module 120 to attenuate the effects of vibrations and thereby reduce damage to these components. Specifically, in the potting area 120B (such as Figure 1B The PCB module 120 is covered with glue in the potting area 120B (shown in the oblique line area) to reduce the impact of external vibration on the PCB module 120 and prevent particles, dust and water from contaminating the electronic components inside the PCB module 120. Optionally, the potting area 120B of the PCB module 120 can be covered with glue by low-pressure injection molding. Specifically, low-pressure hot melt adhesive raw materials are used at low pressure (such as 1-60 bar) and an operating temperature below 230°C, and the potting area 120B of the PCB module 120 is covered with glue by low-pressure injection molding equipment.

[0063] like Figures 9A-9B and Figure 10-11The second embodiment of the motor control unit of the present application is shown, which is easy to disassemble and replace. The difference from the above-mentioned first embodiment is that the socket module 130 is integrated with the PCB module 120. Specifically, the socket module 130 and the bottom shell 120D of the PCB module 120 are integrally formed. In this embodiment, the first locking member includes a protective cover 160 and a fastener 170. A fixing block 130K is protruded upward on one side of the socket module 130, and a protrusion 130L is fixed on the outer side of the fixing block 130K. A fixing column 130M is arranged on the other side of the socket module 130, and a fixing groove 130N is opened in the middle of the top of the fixing column 130M. Correspondingly, a card hole 160A matching with the protrusion 130L is arranged on one side of the protective cover 160, and a fixing hole 160B is arranged on the other side of the protective cover 160 at the position corresponding to the fixing groove 130N. After the housing 110A of the control unit 110 is inserted into the socket module 130, the locking hole 160A on one side of the protective cover 160 is aligned with the protrusion 130L on one side of the socket module 130 and then the fastener 170 is inserted into the fixing groove 130N on the other side of the socket module 130 through the fixing hole 160B on the other side of the protective cover 160 for fixing. The fastener can be a pin, a screw, a bolt, etc., to achieve a firm assembly of the control unit 110 and the socket module 130. In some embodiments, the first locking member can further include a quick release member to quickly release the first locking member to release the lock. The quick release member can be a tab, a button, or a lever, etc., which allows the control unit 110 to be removed from the socket module 130 without tools or with minimal tool assistance by hand or with a simple hand tool. The use of the first locking member enables the control unit 110 to be stably and reliably fastened to its associated socket module 130 under normal operating conditions. However, the optional quick release feature of the first locking member also helps to conveniently remove the control unit 110 when maintenance, repair or replacement is required. Therefore, in a standard use scenario, the first locking member exhibits a strong and reliable combination, but can be quickly disassembled when necessary without damaging the components. The first guide member includes a guide post 110H configured on the insertion side of the control unit 110 and a guide hole 130P configured at the bottom of the socket module 130 and matching with the guide post 110H, the guide post 110H is embedded in the guide hole 130P, and the guide post 110H is aligned with the guide hole 130P and inserted, so that the housing 110A of the control unit 110 can be properly installed in the socket module 130. The shapes of the guide post 110H and the guide hole 130P can be reasonably set as needed, such as triangular, square, trapezoidal, T-shaped and I-shaped, as long as the housing 110A of the control unit 110 can be properly installed in the socket module 130.

[0064] like Fig.11 , Figures 12A-12B , Figures 13A-13B and Fig.14The third embodiment of the motor control unit of the present application that is easy to disassemble and replace is shown. The difference from the first embodiment is that: the socket module 130 is replaced by an isolation module 180. When the potting area 120B of the PCB module 120 is filled with glue, the isolation module 180 is constructed to be detachably installed in the installation area 120A of the PCB module 120, so that the potting area 120B of the PCB module 120 is separated from the installation area 120A at an adjacent position; when the glue of the potting area 120B of the PCB module 120 is cured, the isolation module 180 is constructed to be removed from the installation area 120A of the PCB module 120, so that the control unit 110 can be detachably installed in the installation area 120A of the PCB module 120. Specifically, the overall shape of the isolation module 180 corresponds to the shape of the control unit 110, which is a square. The interior of the isolation module 180 can be a solid or hollow structure, and its bottom shape matches the top of the installation area 120A of the PCB module 120. The outer wall profile can be appropriately adjusted according to the shape of the installation area 120A. In this embodiment, a stopper 180A is fixed on one side of the isolation module 180 corresponding to the connection module position of the control unit 110, so as to provide a position for the subsequent connection of the connection module. In this embodiment, the first locking member includes a protective cover 160 and a fastener 170, a fixing block 130K is protruded upward on one side of the installation area 120A of the PCB module 120, a convex block 130L is fixed on the outer side of the fixing block 130K, a fixing column 130M is configured on the other side of the installation area 120A of the PCB module 120, and a fixing groove 130N is opened in the middle of the top of the fixing column 130M, and accordingly, a card hole 160A matching with the convex block 130L is configured on one side of the protective cover 160, and a fixing hole 160B is configured on the other side of the protective cover 160 corresponding to the position of the fixing groove 130N. After the housing 110A of the control unit 110 is inserted into the mounting area 120A of the PCB module 120, the locking hole 160A on one side of the protective cover 160 is aligned with the protrusion 130L on one side of the mounting area 120A of the PCB module 120 and then the fastener 170 is inserted through the fixing hole 160B on the other side of the protective cover 160 into the fixing groove 130N on the other side of the mounting area 120A of the PCB module 120 for fixing. The fastener may be a pin, a screw, a bolt, etc., to achieve a firm assembly of the control unit 110 to the mounting area 120A of the PCB module 120. In some embodiments, the first locking member may further include a quick release member to quickly release the first locking member to release the lock. The quick release member may be a tab, a button, a lever, etc., which allows the control unit 110 to be removed from the socket module 130 without tools or with minimal tool assistance by hand or with a simple hand tool. The use of the first locking member enables the control unit 110 to be stably and reliably fastened to the mounting area of ​​the PCB module 120 under normal operating conditions.However, the optional quick release feature of the first locking member also helps to conveniently disassemble the control unit 110 when maintenance, repair or replacement is required. Therefore, in standard use scenarios, the first locking member exhibits a strong and reliable combination, but can be quickly disassembled when necessary without damaging the components. The first guide member includes a guide post 110H configured at the bottom of the control unit 110 and a guide hole 130P configured in the installation area of ​​the PCB module 120 and matched with the guide post 110H, the guide post 110H is embedded in the guide hole 130P, and the guide post 110H is inserted into the guide hole 130P so that the housing 110A of the control unit 110 can be properly installed in the installation area 120A of the PCB module 120. The number of guide posts 110H and guide holes 130P can be reasonably set as needed, such as one, two or more than two. In this embodiment, the number of guide posts 110H and guide holes 130P is two. The shapes of the guide pillars 110H and the guide holes 130P can be reasonably set as needed, such as triangle, square, trapezoid, T-shaped and I-shaped, as long as the housing 110A of the control unit 110 can be correctly installed in the socket module 130. The connection module includes a signal connection member 140 for establishing a signal connection between the control unit 110 and the PCB module 120. In this embodiment, the signal connection member 140 adopts a pin connector, specifically including a connector male end 140C configured on the control unit 110 and a connector female end 140D configured on the PCB module 120 and correspondingly plugged with the connector female end 140D. Of course, in other embodiments, the signal connection member 140 can also adopt the various signal transmission methods listed in the first embodiment. The connection module can also include a power connection member 150 for establishing a power connection between the control unit 110 and the PCB module 120. The power connection member 150 can adopt the various power transmission methods listed in the first embodiment, which will not be repeated here.

[0065] In view of the above, it should be understood that embodiments of the present invention can provide various advantages over the prior art. First, the control unit 110 and the PCB module 120 are both separate entities, but are effectively connected through a quick connection mechanism. The connection module is used to establish signal and power connections between the control unit 110 and the PCBA module. This configuration allows for quick and simple replacement of the control unit 110, while also saving space in the tool. Second, a compact and integrated switch design is adopted, which can reduce voltage drop and wire complexity, not only allowing individual parts to be quickly and easily replaced on site / repair center without wasting resources, but also providing a reliable joint method that can carry high currents and is sealed against dust and vibration. In addition, compared with the prior art, the socket module 130 design not only reduces space occupancy, but also improves the maintainability of the control unit 110, making the maintenance and replacement of the control unit 110 faster, easier, and less costly; the socket module 130 can also ensure precise connection between the control unit 110 and the PCB module 120, thereby improving performance and reliability; the socket module 130 also provides a fence for the PCB module 120 packaging process, even after the PCB module 120 is potted, it will not affect the removal and replacement of the control unit 110.

[0066] Those skilled in the art will appreciate that the invention described herein is susceptible to changes and modifications other than those specifically described without departing from the scope of the present invention. All these changes and modifications apparent to those skilled in the art should be considered to fall within the spirit and scope of the present invention as broadly described above. It should be understood that the present invention includes all these changes and modifications. The present invention also includes all steps and features cited or indicated individually or jointly in the specification, as well as any combination and all combinations of any two or more steps or features in the steps or features.

[0067] The reference to any prior art in this specification is not, and should not be taken as, an acknowledgment or any form of suggestion that the prior art forms part of the common general knowledge.

Claims

1. A motor control unit that is easy to disassemble and replace, used to control the operation of a DC motor of an electrical device, characterized in that: The motor control unit comprises: Control unit; A PCB module, wherein the PCB module has a potting area and a mounting area adjacent to the potting area; A socket module, the socket module is fixedly mounted to the mounting area of ​​the PCB module, and the control unit is detachably mounted to the socket module; A connection module, used to establish a signal connection between the control unit and the PCB module, or to establish a signal and power connection between the control unit and the PCB module, so that the PCB module receives the signal and / or power input by the control unit, thereby controlling the signal and / or power of the DC motor; The socket module includes a partition member, which is configured to separate the potting area of ​​the PCB module from the mounting area at adjacent locations so that glue will not flow into the mounting area when the potting area of ​​the PCB module is potted with glue.

2. The motor control unit according to claim 1, characterized in that: The socket module comprises a three-dimensional closed loop structure having a first opening surface, and the control unit comprises a shell, at least a portion of which is inserted into the socket module through the first opening surface.

3. The motor control unit according to claim 2, characterized in that: The first opening surface is located on the side of the socket module, and at least a portion of the shell of the control unit is inserted into the socket module through the first opening surface along the X-axis or Y-axis direction; or, the first opening surface is located on the top surface of the socket module, and at least a portion of the shell of the control unit is inserted into the socket module through the first opening surface along the Z-axis direction.

4. The motor control unit according to any one of claims 2 to 3, characterized in that: The control unit includes a speed control member, at least a portion of which is located outside the housing, and the socket module is configured with a second opening surface that matches the portion of the speed control member located outside the housing.

5. The motor control unit according to claim 4, characterized in that: The second opening surface coincides with the first opening surface.

6. The motor control unit according to any one of claims 2 to 5, characterized in that: The control unit includes a reversing control member, at least a portion of which is located outside the housing, and the socket module is configured with a third opening surface that matches the portion of the reversing control member located outside the housing.

7. The motor control unit according to claim 6, characterized in that: The third opening surface coincides with the first opening surface.

8. The motor control unit according to any one of claims 2 to 7, characterized in that: At least one first locking member is arranged between the control unit and the socket module, and is configured to securely but releasably interconnect the housing of the control unit and the socket module.

9. The motor control unit according to claim 8, characterized in that: The first locking member includes a quick release member configured to quickly release the first locking member.

10. The motor control unit according to any one of claims 2 to 9, characterized in that: At least one first guide member is arranged between the control unit and the socket module, and the first guide member is configured to enable the housing of the control unit to be correctly installed in the socket module.

11. The motor control unit according to any one of claims 2 to 10, characterized in that: An elastic member is arranged between the control unit and the socket module, and is configured to reduce the relative movement between the housing of the control unit and the socket module and prevent particles, dust and water from entering the PCB module through the socket module.

12. The motor control unit according to any one of claims 1 to 11, characterized in that: At least one second locking member is disposed between the socket module and the PCB module, the second locking member being configured to securely but releasably interconnect the socket module and the PCB module.

13. The motor control unit according to any one of claims 1 to 12, characterized in that: At least one second guide member is arranged between the socket module and the PCB module, and the second guide member is configured to enable the socket module to be correctly installed in the installation area of ​​the PCB module.

14. The motor control unit according to any one of claims 1 to 13, characterized in that: The socket module is detachably mounted to the mounting area of ​​the PCB module.

15. The motor control unit according to any one of claims 1 to 13, characterized in that: The socket module is integrated with the PCB module.

16. The motor control unit according to any one of claims 1 to 15, characterized in that: The potting area of ​​the PCB module is covered with glue to reduce the impact of external vibration on the PCB module and prevent particles, dust and water from contaminating the electronic components inside the PCB module.

17. The motor control unit according to any one of claims 1 to 16, characterized in that: The connection module includes a signal connection member for establishing a signal connection between the control unit and the PCB module.

18. The motor control unit according to claim 17, characterized in that: The connection module further comprises a power connection member for establishing a power connection between the control unit and the PCB module.

19. The motor control unit according to any one of claims 1 to 16, characterized in that: A connecting member extends from the housing surface of the control unit, and the connecting module includes a signal connecting member for establishing a signal connection between the connecting member of the control unit and the PCB module.

20. The motor control unit according to claim 19, characterized in that: The connection module further comprises a power connection member for establishing a power connection between the connection member of the control unit and the PCB module.

21. A motor control unit that is easy to disassemble and replace, used to control the operation of a DC motor of an electrical device, characterized in that: The motor control unit comprises: Control unit; A PCB module, wherein the PCB module has a potting area and a mounting area adjacent to the potting area; an isolation module, wherein when the potting area of ​​the PCB module is potted with glue, the isolation module is configured to be detachably mounted on the mounting area of ​​the PCB module, so that the potting area and the mounting area of ​​the PCB module are separated at an adjacent position; when the glue of the potting area of ​​the PCB module is cured, the isolation module is configured to be removed from the mounting area of ​​the PCB module, so that the control unit can be detachably mounted on the mounting area of ​​the PCB module; A connection module is used to establish a signal connection between the control unit and the PCB module, or to establish a signal and power connection between the control unit and the PCB module, so that the PCB module receives the signal and / or power input by the control unit, thereby controlling the signal and / or power of the DC motor.

22. The motor control unit according to claim 21, characterized in that: At least one first locking member is disposed between the control unit and the mounting area of ​​the PCB module, the first locking member being configured to securely but releasably interconnect the housing of the control unit and the mounting area of ​​the PCB module.

23. The motor control unit according to claim 22, characterized in that: The first locking member includes a quick release member configured to quickly release the first locking member.

24. The motor control unit according to any one of claims 21 to 23, characterized in that: At least one first guide member is arranged between the control unit and the mounting area of ​​the PCB module, and the first guide member is configured to enable the housing of the control unit to be correctly mounted to the mounting area of ​​the PCB module.

25. The motor control unit according to any one of claims 21 to 24, characterized in that: The potting area of ​​the PCB module is covered with glue to reduce the impact of external vibration on the PCB module and prevent particles, dust and water from contaminating the electronic components inside the PCB module.

26. The motor control unit according to any one of claims 21 to 26, characterized in that: The connection module includes a signal connection member for establishing a signal connection between the control unit and the PCB module.

27. The motor control unit according to claim 26, characterized in that: The connection module further comprises a power connection member for establishing a power connection between the control unit and the PCB module.

28. An electrical device comprising the electrical switch according to any one of claims 1 to 27.

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