WO2022218094A1

WO2022218094A1 - Multi-head electric tool

Info

Publication number: WO2022218094A1
Application number: PCT/CN2022/081574
Authority: WO
Inventors: 冯继丰; 潘丽; 郭增冰; 漆琴
Original assignee: 南京泉峰科技有限公司
Priority date: 2021-04-15
Filing date: 2022-03-18
Publication date: 2022-10-20

Abstract

A multi-head electric tool, comprising: a power assembly (100), which is configured to mount at least one working assembly (200); a working assembly, which is configured to work under the drive of the power assembly; a drive motor (21), which drives the working assembly mounted on the power assembly to work; a power supply device (103), which is configured to provide power to the drive motor; and a controller (11), which is configured to control, according to a target control program that matches the working assembly, the drive motor to rotate. The working assembly is provided with an optical signal transmitting device (22), and an optical signal output device is configured to output an assembly signal carrying working assembly identification information; the power assembly is provided with an optical signal receiving device (11), optical signal receiving device is configured to receive the assembly signal and identify the working assembly identification information in the assembly signal; and the controller can obtain the working assembly identification information, extract the target control program that matches the working assembly identification information, and control, according to the target control program, the drive motor to rotate, so as to drive the working assembly to work.

Description

Multi-head power tool

This disclosure claims the priority of a Chinese patent application with application number 202110403247.8 filed with the China Patent Office on April 15, 2021 and a Chinese patent application with application number 202111394027.X filed with the China Patent Office on November 23, 2021 , the entire contents of the above two applications are incorporated herein by reference.

technical field

The present application relates to the technical field of power tools, for example, to a multi-head power tool.

Background technique

The multi-head power tool is a popular power tool in the market. The main body of the tool is a power assembly, and a power assembly can work with a variety of working assemblies, such as with pruning machines, cultivators, edgers, snow shovels machine, hair dryer and chainsaw.

However, when the power components of the related art are adapted to various work components, they cannot distinguish different work components, and the same control program is used to control different work components to work, so that some work components are not in optimal working conditions. The function is also relatively simple.

SUMMARY OF THE INVENTION

In order to solve the deficiencies of the related art, the present application provides a multi-head power tool that can match a corresponding target control program for different work components, so that each work component can achieve an optimal working state.

This application adopts the following technical solutions:

A multi-head power tool, comprising: a power assembly configured to install at least one working assembly; a working assembly configured to work under the driving of the power assembly; a drive motor configured to drive the working assembly installed on the power assembly to work a power supply device, configured to provide power for the drive motor; a controller, configured to control the rotation of the drive motor according to a target control program matched with the working assembly; wherein the working assembly is provided with an optical signal output device , the optical signal output device is configured to output the component signal carrying the identification information of the working component; the power component is provided with an optical signal receiving device, and the optical signal receiving device is configured to receive the component signal and identify the component the working component identification information in the signal; the controller is configured to: acquire the working component identification information; extract a target control program matching the working component identification information, and control the system according to the target control program The drive motor rotates to drive the working assembly to work.

Optionally, the optical signal output device includes a light wave transmitting device, and the optical signal receiving device includes a light wave receiving device; the light wave transmitting device transmits an optical signal with a certain frequency or light intensity.

Optionally, the optical signal output device includes an optical fiber transmitting device, and the optical signal receiving device includes an optical fiber receiving device; the optical fiber transmitting device and the optical fiber receiving device establish a connection based on an optical fiber interface.

Optionally, after the working assembly is installed on the power assembly, the optical fiber transmitting device converts the electrical signal carrying the identification information of the working assembly into an optical signal, and outputs the optical signal to the optical fiber receiving device. The optical fiber receiving device receives the optical signal and converts it into an electrical signal, so as to identify the identification information of the working components in the electrical signal.

Optionally, the working assembly includes: a power supply unit capable of supplying power to the optical fiber launching device; the multi-head power tool further includes: a power-on triggering structure arranged on the power assembly to be installed on the working assembly When on the power assembly, the power supply unit on the working assembly is triggered to output power, and the optical fiber launching device is powered on; after the optical fiber launching device is powered on, the electrical signal carrying the identification information of the working assembly is converted into optical signal, and output the optical signal to the optical fiber receiving device.

Optionally, the power assembly includes: a wireless charging and transmitting unit configured to transmit power to the wireless charging receiving unit; the working assembly includes: a wireless charging receiving unit configured to supply power to the optical fiber transmitting device; the wireless charging After receiving power from the unit to the optical fiber transmitting device, the optical fiber transmitting device converts the electrical signal carrying the identification information of the working component into an optical signal, and outputs the optical signal to the optical fiber receiving device.

Optionally, it also includes: connecting terminals, which are arranged on the power assembly, so as to establish electrical connection with the assembly terminals on the working assembly when the working assembly is installed on the power assembly, so that the power supply device The optical signal output device can be powered on based on the electrical connection; after the optical signal output device is powered on, the component signal carrying the identification information of the working component is output to the optical signal receiving device.

Optionally, the working assembly includes: a first working assembly having a first assembly terminal, the first assembly terminal being electrically connected to a first connecting terminal of the power assembly; a second working assembly having a second assembly terminal , the second assembly terminal is electrically connected to the second connection terminal of the power assembly; the number of the first assembly terminal or the number of the second assembly terminal is less than the number of the connection terminals on the power assembly .

Optionally, the sum of the numbers of the first connection terminals and the second connection terminals is less than or equal to three.

Optionally, the number of the first component terminals or the second component terminals is less than or equal to two.

Optionally, the first working assembly includes: a first assembly connecting rod configured to form a mechanical connection with the connecting rod of the power assembly; the first assembly terminal is disposed in the first assembly connecting rod.

Optionally, the inner diameter of the connecting rod of the first component is 20 mm to 40 mm.

Optionally, the first working assembly includes a cutting head; the second working assembly includes other working heads other than the cutting head.

Optionally, the first working assembly is provided with a triggering device for user operation; the second working assembly does not have the triggering device.

Optionally, the working component identification information includes a working component model or type.

A multi-head power tool, comprising: a power assembly configured to install at least one working assembly; a working assembly configured to work under the driving of the power assembly; a drive motor configured to drive the working assembly installed on the power assembly to work a power supply device, configured to provide power for the drive motor; a controller, configured to control the rotation of the drive motor according to a target control program matched with the working assembly; wherein the working assembly includes a signal output device, and the The signal output device is configured to output a component signal carrying the identification information of the working component; the power component includes a signal receiving device, and the signal receiving device is configured to receive the component signal and identify the work in the component signal. component identification information; the controller is configured to: acquire the work component identification information; extract a target control program matching the work component identification information, and control the drive motor to rotate according to the target control program, to The working components are driven to work.

A multi-head power tool, comprising: a power assembly configured to install at least one working assembly; a working assembly configured to work under the driving of the power assembly; a drive motor configured to drive the working assembly installed on the power assembly to work a power supply device, configured to provide power for the drive motor; a controller, configured to control the rotation of the drive motor according to a target control program matched with the working assembly; wherein the working assembly includes an optical fiber launching device, and the The optical fiber transmitting device is configured to send an assembly signal carrying identification information of the working assembly; the power assembly includes an optical fiber receiving device, and the optical fiber receiving device is configured to receive the assembly signal and identify the work in the assembly signal. component identification information; the controller is configured to: acquire the work component identification information; extract a target control program matching the work component identification information, and control the drive motor to rotate according to the target control program, to The working components are driven to work.

Optionally, it also includes: connecting terminals, which are arranged on the power assembly, so as to establish electrical connection with the assembly terminals on the working assembly when the working assembly is installed on the power assembly, so that the power supply device The optical fiber launching device can be powered on based on the electrical connection; after the optical fiber launching device is powered on, the electrical signal carrying the identification information of the working component is converted into an optical signal, and the optical signal is output to the optical fiber receiving device device.

The advantages of the present invention lie in that: by disposing the transceiver devices capable of transmitting optical signals on the working assembly and the power assembly respectively, the power assembly can identify the type or model of the working assembly by means of optical communication, and then output the corresponding target The control program controls the work of the work component, so that the currently installed work component achieves the best working state.

Description of drawings

1 is a schematic diagram of a multi-head power tool according to an embodiment of the present application;

2 is a schematic circuit diagram of a multi-head power tool in an embodiment;

3 is a schematic circuit diagram of a multi-head power tool in an embodiment;

4 is a schematic circuit diagram of a multi-head power tool in an embodiment;

5 is a flowchart of a control method of a multi-head power tool in an embodiment;

6a and 6b are schematic structural diagrams of a connection mode of a power assembly and a working assembly in a multi-head connection tool in an embodiment of the present application;

Fig. 7a and Fig. 7b are the structural representation of a kind of connection mode of the power assembly and the working assembly in the multi-head connection tool in the embodiment of the present application;

Fig. 8a and Fig. 8b are structural schematic diagrams of a connection mode of the power assembly and the working assembly in the multi-head connection tool in the embodiment of the present application;

Figures 9a and 9b are schematic structural diagrams of a connection mode of a power assembly and a working assembly in a multi-head connection tool in an embodiment of the present application;

10 is a schematic structural diagram of a connection mode of the power assembly and the working assembly in the multi-head connection tool in the embodiment of the present application;

FIG. 11 is a schematic structural diagram of a connection mode of the power component and the working component in the multi-head connection tool in the embodiment of the present application.

In the picture:

100, power components; 200, work components;

21. Driving motor; 22. Optical signal transmitting device; 23. Driving circuit; 24. Power supply unit; 25. Wireless charging receiving unit; 103. Power supply device; 11. Controller; 12. Optical signal receiving device;

101, holding part; 102, operating switch; 104, first connecting part; 105, connecting rod; 201, second connecting part; 202, connecting rod; 203, working head; 1041, connecting terminal; 1042, first connecting 1043, the second connection terminal; 2011, the component terminal; 2012, the first component terminal; 2013, the second component terminal; 2014, the third component terminal; 2015, the connecting wire.

Detailed ways

The present application will be introduced below with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described herein are only used to explain the present application. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all the structures related to the present application.

As shown in FIG. 1 and FIG. 2, the multi-head power tool of the embodiment includes a power assembly 100 and a working assembly 200. The power assembly 100 includes a grip portion 101, an operation switch 102, a power supply device 103, and a first connection portion 104; The working assembly 200 includes a second connecting part 201 , a connecting rod 202 , and a working head 203 . Optionally, the working assembly 200 may be the lawn mower assembly shown in FIG. 1 , or may be a pruning assembly, a cultivator assembly, an edging assembly, a snow shovel assembly, a blower assembly, a chainsaw assembly, or the like. It can be understood that, the power assembly 100 can be installed in different working areas to achieve different functions, for example, the pruning assembly can be installed to trim branches, the blower assembly can be installed to blow leaves, the grass trimming assembly can be installed to cut grass, etc. In this application, in addition to realizing the structural connection between the working assembly 200 and the power assembly 100 through a mechanical structure (such as a buckle, etc.), the first connecting part 104 and the second connecting part 201 are inside the first connecting part 104 and the second connecting part 201 A connection terminal 1041 is also provided to realize electrical connection between the power assembly 100 and the working assembly 200 , and the power output from the battery pack supplies power to the drive motor 21 in the working assembly 200 through the electrical connection.

It should be noted that when the user presses the operation switch 102, the power supply device 103 in the power assembly 100 supplies power to the controller 11 in the assembly, and at the same time, the signal output device 22 in the working assembly 200 is powered on and The assembly signal is output, and the signal receiving device in the power assembly 100 receives the above assembly signal, and identifies the identification information of the working assembly 200 accordingly. Optionally, the controller 11 in the power assembly 100 will select a matching target control program according to the identification information of the working assembly 200 to control the drive motor 21 to rotate. The so-called target control program matched with the work assembly 200 is a control program capable of realizing the optimal working state of the work assembly 200 .

In implementation, referring to the control circuit block diagram of the multi-head tool shown in FIG. 2 , the working assembly 200 includes a driving motor 21 , an optical signal transmitting device 22 and a driving circuit 23 , and the power assembly 100 includes a power supply device 103 , a controller 11 and an optical signal receiving device 12.

The optical signal transmitting device 22 can be powered on by the power supply device 103 in the power assembly 100 when the working assembly 200 and the power assembly 100 are electrically connected, so that the optical signal transmitting device 22 sends a message carrying the identification information of the working assembly. The component signal, the optical signal receiving device 12 in the power component 100 can receive the above component signal, and identify the identification information of the working component in the signal. In some embodiments, the action component identification information may include the model or type of the work component 200 or other identification information that can uniquely represent the work component 200 .

It can be understood that the power supply device 103 in the power assembly 100 can be a battery pack or AC mains, and the power supply device 103 can supply power to the controller 11 in the power assembly 100, and establish power between the power assembly 100 and the working assembly 200. Power is supplied to the drive motor 21 in the working assembly 200 when connected.

The optical signal receiving device 12 can establish a data transmission channel with the optical signal transmitting device 22 , and obtain component information output by the optical signal transmitting device 22 through the data transmission channel.

In one embodiment, the optical signal transmitting device 22 is an optical fiber transmitting device, the optical signal receiving device 12 is an optical fiber receiving device, and there is an optical channel between the optical fiber transmitting device and the optical fiber receiving device, and the two can transmit optical signals through the optical channel. It can be understood that the optical fiber transmitting device can convert the electrical signal carrying the identification information of the working component into an optical signal and then transmit it to the optical fiber receiving device through the optical path. The optical fiber receiving device converts the received optical signal into an electrical signal and then recognizes it. The work component identification information in it. It should be noted that a communication connection between the optical fiber transmitting device and the optical fiber receiving device needs to be established through an optical fiber interface, that is, an optical fiber interface is respectively provided on the power assembly 100 and the working assembly 200 .

In one embodiment, the optical signal transmitting device 22 is a light wave transmitting device, and the optical signal receiving device 12 includes a light wave receiving device. The light wave transmitting device can transmit a light wave signal with a certain frequency or light intensity, and the light wave signal receiving device can receive the above light wave signal, and determine the type or model of the working assembly 200 according to the light information such as the frequency or light intensity of the identified light wave signal. . That is, there is no need to establish optical communication through a hardware interface between the light wave signal transmitting device and the receiving device, but directly transmit and receive light waves, and identify the working components 200 according to information such as the frequency or intensity of the light waves themselves.

The driving circuit 23 can receive the control signal output by the controller 11, and control the rotational speed or the rotational direction of the driving motor 21 by changing its own conduction state. Thus, the currently installed working assembly 200 can achieve the best working state. Optionally, the driving circuit 23 may be composed of one or more switching elements. For example, the drive circuit 23 is constituted by a plurality of switching elements Q1-Q6. Each gate terminal of the switching element is electrically connected to the controller 11 and configured to receive a control signal from the controller 11 . Each drain or source of the switching element is connected to the stator winding of the drive motor 21 . The switching elements Q1 - Q6 receive control signals from the controller 11 to change their respective conduction states, thereby changing the current applied by the power supply device to the stator windings of the drive motor 21 . In one embodiment, the driver circuit 23 may be a three-phase bridge driver circuit including six controllable semiconductor power devices (eg, FETs, BJTs, IGBTs, etc.). It can be understood that the above-mentioned switching elements can also be other types of solid-state switches, such as insulated gate bipolar transistors (IGBTs), bipolar junction transistors (BJTs), and the like.

The controller 11 can acquire the identification information of the working components identified by the signal receiving device, that is, the optical fiber receiving device, and search for the target control program matching the identification information in the storage unit according to the identification information. It can be understood that the storage unit stores all control programs corresponding to the working assemblies 200 that the multi-head tool can connect to. Different working assemblies 200 connected to the power assembly 100 have different corresponding target control programs. Optionally, the controller 11 can control the conduction state of the switching elements in the driving circuit 23 according to the control logic of the target control program, so as to drive the driving motor 21 to work, so that the working assembly 200 can reach the optimal working state. The so-called optimal working state of the working assembly 200 may be that the driving motor 21 in the working assembly 200 has the highest working efficiency and the best user experience effect under corresponding working conditions.

In this embodiment, the working assembly 200 communicates with the power assembly 100 through optical fiber, and transmits the identification information of the working assembly 200, so that the power assembly 100 can select a corresponding control program according to the identification information to control the working assembly 200 to achieve the best working state.

In another embodiment, the control circuit block diagram of the multi-head tool is shown in FIG. 3 , the working assembly 200 includes a driving motor 21 , an optical signal transmitting device 22 , a driving circuit 23 and a power supply unit 24 , and the power assembly 100 includes a power supply device 103 , a control 11 and optical signal receiving device 12. It should be noted that, in this embodiment, the power-on triggering structure may also be provided on the power assembly 100 , which can trigger the power supply unit 24 on the working assembly 200 to output power when the working assembly 200 is installed on the power assembly 100 The fiber optic launcher is powered. That is to say, the power supply device 103 in the power assembly 100 does not need to supply power to the optical signal transmitting device 22 of the working assembly 200 , and the optical signal transmitting device 22 is powered by an independent power supply unit 24 as long as the working assembly 200 is installed on the power assembly 100 , the optical signal transmitting device 22 can transmit component information. When the user presses the operation switch 102, the optical signal receiving device 12 can identify the identification information of the working assembly 200 in the assembly information, and the controller 11 can obtain the corresponding target control program to control the working assembly 200 to work accordingly. On the basis of having the best working condition, the response time of the tool is improved.

In some embodiments, the power supply unit 24 may be a button cell or other disposable or rechargeable battery or the like. It can be understood that, the signal receiving device in the power assembly 100 can also adopt an independent power supply mode, and is powered by another power supply unit. Similarly, when the working assembly 200 is installed on the power assembly 100, the power-on triggering structure can simultaneously trigger the power supply unit 24 and another power supply unit to power on, so that the optical signal transmitting device and the optical signal receiving device 12 are powered on at the same time. Therefore, before the user presses the operation switch 102, the optical signal receiving device 12 has recognized the component identification of the currently installed working component 200. When the user presses the operation switch 102, the controller 11 can directly obtain the identification information of the work component, and search for the corresponding target control program to control the work component 200 to work accordingly, which improves the response time of the tool.

In yet another embodiment, the control circuit block diagram of the multi-head tool is shown in FIG. 4 , the working assembly 200 includes a driving motor 21 , an optical signal transmitting device 22 , a driving circuit 23 and a wireless charging receiving unit 25 , and the power assembly 100 includes a power supply device 103 , a controller 11 , an optical signal receiving device 12 and a wireless charging transmitting unit 14 . In one embodiment, after the working assembly 200 is installed on the power assembly 100 and the user presses the operation switch 102, the wireless charging transmitting unit 14 transmits power to the wireless charging receiving unit 25, so that the wireless charging receiving unit 25 can transmit power for the optical fiber The device 22 is powered. Therefore, after the optical fiber transmitting device is powered on, the electrical signal carrying the identification information of the working component is converted into an optical signal, and the optical signal is output to the optical fiber receiving device. After the optical fiber receiving device receives the optical signal, it converts it into an electrical signal and recognizes the identification information of the working assembly therein, and then the controller 11 can obtain the identification information, and accordingly search for the corresponding target control program to control the working assembly 200 to work.

In this embodiment, the wireless charging transmitting unit and the wireless charging receiving unit 25 can complete wireless charging by means of electromagnetic induction, magnetic field resonance, or radio waves. By means of wireless charging, unstable transmission of tool information caused by friction of the power-on trigger unit or unstable transmission caused by damage to the connecting terminal 1041 is avoided.

It should be noted that, in the above embodiments, the signal transmitting devices are all optical fiber transmitting devices, and the signal receiving devices are all optical fiber receiving devices. Other optical signal transmitting and receiving devices similar to or capable of realizing the above functions are also within the protection scope of the present application.

The control method of the multi-head power tool will be described below with reference to FIG. 5, and the method includes the following steps:

S101: Acquire an optical signal sent by an optical fiber transmitting device.

S102: Identify the identification information of the working component in the optical signal.

S103: Extract the target control program matching the identification information of the work component.

S104, controlling the driving motor to rotate according to the target control program to drive the working assembly to work.

As shown in FIG. 6 , the first connecting portion 104 of the power assembly 100 may be located at the end of the connecting rod 105 of the power assembly 100 . In one embodiment, as shown in FIGS. 6 a to 7 b , the connection terminal 1041 of the first connection part 104 may be disposed inside the connection rod 105 . As shown in FIG. 6 , the second connecting portion 201 of the working assembly 200 may be located at the end of the assembly connecting rod 202 of the working assembly 200 . In one embodiment, as shown in FIGS. 6 a to 7 b , the component terminals 2011 of the second connecting portion 201 may be disposed inside the component connecting rods 202 . Therefore, while the connecting rod 105 of the power assembly 100 and the assembly connecting rod 202 of the working assembly 200 are butted based on mechanical connection, the connecting terminal 1041 of the power assembly 100 also establishes an electrical connection with the assembly terminal 2011 of the working assembly 200 . It should be noted that the connection terminal 1041 in FIG. 1 includes the first connection terminal 1042 and the second connection terminal 1043 in FIGS. 6 a to 11 , and the assembly terminal 2011 in FIG. 1 includes the first assembly terminal in FIGS. 6 a to 11 . 2012 and the second component terminal 2013.

In an alternative implementation manner, as shown in FIGS. 8a to 11 , the connection terminals 1041 of the first connection part 104 may be arranged outside the connection rod 105 , and the component terminals 2011 of the second connection part 201 may also be arranged at the component connection rods 202 outside. In an alternative implementation manner, the connection terminal 1041 of the first connection part 104 may be arranged inside the connection rod 105, and the component terminal 2011 of the second connection part 201 may be arranged outside the component connection rod 202; or the first connection part 104 The connecting terminal 1041 of the second connecting part 201 may be disposed outside the connecting rod 105 , and the component terminal 2011 of the second connecting part 201 may also be disposed inside the assembly connecting rod 202 . In this embodiment of the present application, the positions of the connecting terminals 1041 and the component terminals 2011 on the connecting rod may also be other positional arrangements or arrangements, for example, the terminals are arranged side by side, arranged next to each other, evenly or non-uniformly distributed, etc. Not to list them one by one.

In the embodiment of the present application, FIG. 6a to FIG. 11 more intuitively list several optional connection or layout modes of the connection terminal 1041 and the component terminal 1041, and other connection modes based on the deformation or combination of the above-mentioned figures are all within the scope of protection of this application. It should be noted that Figures 6a, 6b, 8a, 8b and 10 may be the connection methods of the first working assembly and the power assembly 100; Figures 7a, 7b, 9a, 9b and 11 may be the second How the working assembly is connected to the power assembly 100 . Of course, the connection method between the first working assembly and the power assembly 100 can also be shown in Fig. 7a, Fig. 7b, Fig. 9a, Fig. 9b and Fig. 11; 6b, Fig. 8a, Fig. 8b and Fig. 10, the drawings are not provided here.

In one embodiment, as shown in FIGS. 6 a to 11 , the number of the component connection terminals 2011 on the working component 200 is smaller than the number of the connection terminals 1041 on the power component 100 . In the actual setting, the number of the component connection terminals 2011 on the externally displayed working component 200 is the same as the number of the connection terminals 1041 on the power component 100, but there are one or more blind terminals. The so-called blind terminals have no actual connection function. It is only a terminal that matches the connection terminal 1041 on the power assembly 100 in appearance. In one embodiment, blind terminals may not be provided. Exemplarily, the third component terminal 2014 in FIGS. 6 a to 11 is a blind terminal. Generally, the blind terminal does not correspond to the internal connecting wire 2015 , but can actually establish an electrical connection with the connecting terminal 1041 of the first connecting portion 104 . A connecting wire 2015 is provided inside the connecting terminal.

In one embodiment, when the user presses the operation switch 102, the power supply device 103 in the power assembly 100 supplies power to the controller 11 in the assembly, and at the same time, the signal output device in the working assembly 200 is powered on and The component information is output, and the signal receiving device in the power component 100 receives the above component information, and identifies the working component accordingly. Optionally, the controller 11 in the power assembly 100 can select a target control program matched with the identified work assembly 200 to control the drive motor 21 to rotate. The so-called target control program matched with the work component is the control program that can realize the optimal working state of the work component. Optionally, the working assembly 200 may not have a signal output device, and the power assembly 100 is not provided with a signal receiving device. For example, the working assembly 200 is connected with different identification resistors. After the power assembly 100 and the working assembly 200 are electrically connected, the controller 11 in the power assembly 100 can distinguish different working assemblies according to the different resistances.

In this embodiment, the working assembly 200 may include a first working assembly and a second working assembly. In some embodiments, the first working component means that the component has a trigger device 211 for the user to trigger an operation. For example, the grass trimming component is provided with a winding button, and the user can trigger the controller 11 in the power component 100 by pressing the button. Change the control mode to control the grass trimming component to perform automatic winding action. That is to say, the first working assembly is a working assembly that can be passively driven by the power assembly 100 to work, and can also actively issue functional requirements, and is commonly a grass trimming head capable of automatic winding. The second working assembly refers to an assembly without a triggering device on the assembly. In fact, the second working assembly can only be driven by the power assembly 100 to work passively, and cannot actively send out work requirements. In this embodiment, whether or not to actively issue functional requirements can be used as a basis for dividing work components. In one embodiment, the triggering device on the first working component may be a triggering button or other components that can be freely selected by the user to perform control operations.

In one embodiment, in order to better distinguish the first working assembly from the second working assembly, the first connecting terminal 1042 in the first connecting portion 104 of the power assembly 100 is set to be connected to the first assembly terminal 2012 of the first working assembly For connection, the second connection terminal 1043 is arranged to be connected with the second assembly terminal 2013 of the second working assembly. In some embodiments, the first connection terminal 1042 and the second connection terminal 1043 belong to the connection terminal 1041 in the first connection part 104 ; the first component terminal 2012 and the second component terminal 2013 are only the component terminals 2011 located on different components .

In one embodiment, as shown in FIGS. 1 to 11 , the first assembly terminal 2012 on the first working assembly can be connected to the first connection terminal 1042 , and the second assembly terminal 2013 can be connected to the second connection terminal 1043 . In this embodiment, the number of the first assembly terminals 2012 or the number of the second assembly terminals 2013 is smaller than the connection terminals 1041 on the power assembly 100 . Exemplarily, if the number of the connection terminals 1041 on the power assembly 100 is three, the number of the first assembly terminals 2012 may be one or two, and the number of the second assembly terminals 2013 may also be one or two. . Therefore, the working assembly 200 does not need to completely match all the connection terminals of the power assembly 100 , which reduces the number of assembly terminals on the working assembly 200 and reduces the wiring complexity of the connection terminals or the assembly terminals on the connecting rod. In addition, since the number of component terminals 2011 is smaller than the number of connection terminals 1041 , the controller 11 in the power component 100 can also identify the working component 200 according to the position of the component terminals 2011 docked with the connection terminals 1041 .

Exemplarily, the component connection terminals 2011 on different working components may have different arrangements. Assuming that the connection terminals 1041 on the power assembly 100 are 1, 2 and 3 respectively, and the assembly connection terminals of the other first working assemblies such as the cutting head are 1', 2' and 0', and the assemblies of the other second working assemblies such as the hair dryer are connected The terminals are 0', 2' and 3', where 0' is a blind terminal. Then, when the power assembly 100 recognizes that the working assembly 200 is connected, it only needs to determine whether the action assembly 200 is the first working assembly according to the identified identification of the assembly connecting terminal 2011 . Therefore, the first working component can be identified more conveniently and quickly.

In one embodiment, the inner diameter of the assembly connecting rod 202 of the working assembly 200 is smaller than the inner diameter of the connecting rod 105 of the power assembly 100 . In one embodiment, the inner diameter of the assembly connecting rod 202 of the working assembly 200 is greater than or equal to 20 millimeters and less than or equal to 40 millimeters. In one embodiment, the inner diameter of the assembly connecting rod 202 of the working assembly 200 is greater than or equal to 20 millimeters and less than or equal to 30 millimeters.

Claims

A multi-head power tool, comprising:

a power assembly, arranged to install at least one working assembly;

a working assembly, configured to work under the driving of the power assembly;

a drive motor, configured to drive the working assembly installed on the power assembly to work;

a power supply device configured to provide power to the drive motor;

a controller, configured to control the rotation of the drive motor according to a target control program matched with the work assembly;

The working assembly is provided with an optical signal output device, and the optical signal output device is configured to output an assembly signal carrying identification information of the working assembly;

The power assembly is provided with an optical signal receiving device, and the optical signal receiving device is configured to receive the assembly signal and identify the identification information of the working assembly in the assembly signal;

The controller is configured to:

obtain the identification information of the work component;

Extracting a target control program matching the identification information of the working assembly, and controlling the driving motor to rotate according to the target control program, so as to drive the working assembly to work.
The multi-head power tool according to claim 1, wherein the optical signal output device comprises a light wave transmitting device, and the optical signal receiving device comprises a light wave receiving device; the light wave transmitting device transmits a light wave signal with a certain frequency or light intensity.
The multi-head power tool according to claim 1, wherein the optical signal output device includes an optical fiber transmitting device, and the optical signal receiving device includes an optical fiber receiving device; the optical fiber transmitting device and the optical fiber receiving device are established based on an optical fiber interface connect.
The multi-head power tool according to claim 3, wherein after the working assembly is installed on the power assembly, the optical fiber transmitting device converts the electrical signal carrying the identification information of the working assembly into an optical signal, and transmits the The optical signal is output to the optical fiber receiving device; the optical fiber receiving device receives the optical signal and converts it into an electrical signal, so as to identify the identification information of the working components in the electrical signal.
The multi-head power tool according to claim 4, wherein the working assembly comprises: a power supply unit capable of supplying power to the optical fiber launching device; the multi-head power tool further comprises: a power-on triggering structure arranged on the power assembly When the working assembly is installed on the power assembly, the power supply unit on the working assembly is triggered to output power, and the optical fiber launching device is powered on; after the optical fiber launching device is powered on, it will carry the The electrical signal of the identification information of the working assembly is converted into an optical signal, and the optical signal is output to the optical fiber receiving device.
The multi-head power tool according to claim 4, wherein the power assembly comprises: a wireless charging transmitter unit configured to transmit power to the wireless charging receiver unit; the working assembly includes: a wireless charging receiver unit configured to transmit power to the optical fiber power supply to the device; wherein, after the wireless charging receiving unit supplies power to the optical fiber transmitting device, the optical fiber transmitting device converts the electrical signal carrying the identification information of the working component into an optical signal, and outputs the optical signal to a the optical fiber receiving device.
The multi-head power tool according to claim 1, wherein the multi-head power tool further comprises: a connection terminal provided on the power assembly for connecting with the working assembly when the working assembly is mounted on the power assembly The component terminals on the component establish an electrical connection, so that the power supply device can power on the optical signal output device based on the electrical connection; after the optical signal output device is powered on, the component signal carrying the identification information of the working component is output to the the optical signal receiving device.
The multi-head power tool according to claim 7, wherein the working assembly comprises: a first working assembly having a first assembly terminal, the first assembly terminal being electrically connected with the first connection terminal of the power assembly; Two working components, with a second component terminal, the second component terminal is electrically connected with the second connection terminal of the power component; the number of the first component terminals or the number of the second component terminals is smaller than the power component The number of said connection terminals on the assembly.
The multi-head power tool according to claim 8, wherein the sum of the numbers of the first connection terminals and the second connection terminals is less than or equal to three.
The multi-head power tool of claim 8, wherein the number of the first assembly terminals or the second assembly terminals is less than or equal to two.
The multi-head power tool according to claim 8, wherein the first working assembly comprises: a first assembly connecting rod configured to form a mechanical connection with the connecting rod of the power assembly; the first assembly terminal is disposed at the inside the connecting rod of the first component.
The multi-head power tool according to claim 11, wherein the inner diameter of the connecting rod of the first assembly is 20 mm to 40 mm.
The multi-head power tool of claim 8, wherein the first working assembly includes a cutting head; and the second working assembly includes other working heads other than the cutting head.
The multi-head power tool according to claim 8, wherein the first working assembly is provided with a triggering device for user operation; the second working assembly does not have the triggering device.
The multi-head power tool according to claim 1 , wherein the working assembly identification information includes a working assembly model or type.
A multi-head power tool, comprising:

a power assembly, arranged to install at least one working assembly;

a working assembly, configured to work under the driving of the power assembly;

a drive motor, configured to drive the working assembly installed on the power assembly to work;

a power supply device configured to provide power to the drive motor;

a controller, configured to control the rotation of the drive motor according to a target control program matched with the work assembly;

The working assembly includes a signal output device, and the signal output device is configured to output an assembly signal carrying identification information of the working assembly;

The power assembly includes a signal receiving device, and the signal receiving device is configured to receive the assembly signal and identify the working assembly identification information in the assembly signal;

The controller is configured to:

obtain the identification information of the work component;

Extracting a target control program matching the identification information of the working assembly, and controlling the driving motor to rotate according to the target control program, so as to drive the working assembly to work.
A multi-head power tool, comprising:

a power assembly, arranged to install at least one working assembly;

a working assembly, configured to work under the driving of the power assembly;

a drive motor, configured to drive the working assembly installed on the power assembly to work;

a power supply device configured to provide power to the drive motor;

a controller, configured to control the rotation of the drive motor according to a target control program matched with the work assembly;

The working assembly includes an optical fiber launching device, and the optical fiber launching device is configured to send an assembly signal carrying identification information of the working assembly;

The power assembly includes an optical fiber receiving device, and the optical fiber receiving device is configured to receive the assembly signal and identify the identification information of the working assembly in the assembly signal;

The controller is configured to:

obtain the identification information of the work component;

Extracting a target control program matching the identification information of the working assembly, and controlling the driving motor to rotate according to the target control program, so as to drive the working assembly to work.
The multi-head power tool according to claim 17, wherein after the working assembly is installed on the power assembly, the optical fiber emitting device converts the electrical signal carrying the identification information of the working assembly into an optical signal, and transmits the The optical signal is output to the optical fiber receiving device; the optical fiber receiving device receives the optical signal and converts it into an electrical signal, so as to identify the identification information of the working components in the electrical signal.
The multi-head power tool according to claim 17, wherein the multi-head power tool further comprises: a connection terminal provided on the power assembly for connecting with the work assembly when the work assembly is mounted on the power assembly The component terminals on the component establish an electrical connection, so that the power supply device can power on the optical fiber launching device based on the electrical connection; after the optical fiber launching device is powered on, the electrical signal carrying the identification information of the working component is converted into light signal, and output the optical signal to the optical fiber receiving device.
The multi-head power tool according to claim 19, wherein the working assembly comprises: a first working assembly having a first assembly terminal, the first assembly terminal being electrically connected with the first connection terminal of the power assembly; Two working assemblies, with a second assembly terminal, the second assembly terminal is electrically connected with the second connection terminal of the power assembly; the number of the first assembly terminals or the number of the second assembly terminals is smaller than the power The number of said connection terminals on the assembly.