CN113853277A - Control device and electric tool system - Google Patents

Control device and electric tool system Download PDF

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Publication number
CN113853277A
CN113853277A CN202080009846.5A CN202080009846A CN113853277A CN 113853277 A CN113853277 A CN 113853277A CN 202080009846 A CN202080009846 A CN 202080009846A CN 113853277 A CN113853277 A CN 113853277A
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CN
China
Prior art keywords
battery pack
control device
control unit
electric
power
Prior art date
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Pending
Application number
CN202080009846.5A
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Chinese (zh)
Inventor
索默·哈利
布朗·沃伦
格哈德·格雷厄姆
庞晓丽
梁冰
陆骏
杨智涵
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Positec Power Tools Suzhou Co Ltd
Original Assignee
Positec Power Tools Suzhou Co Ltd
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Filing date
Publication date
Application filed by Positec Power Tools Suzhou Co Ltd filed Critical Positec Power Tools Suzhou Co Ltd
Priority claimed from PCT/CN2020/136188 external-priority patent/WO2021115484A1/en
Publication of CN113853277A publication Critical patent/CN113853277A/en
Pending legal-status Critical Current

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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

A control device (12) and electric tool (11) system, the control device is used for adapting to a plurality of electric tools; the control device includes: a first housing (15); a battery pack mounting part (25); a first control unit (120) provided in the first housing for cutting off power transmission of the battery pack (27) to the electric power tool when the battery pack is abnormal; a first user operation unit (121) arranged on the first shell for a user to operate to control the electric tool; the first interface (21) is electrically connected with the first user operation unit. The electric tool system comprises a control device and an electric tool. The control device can adapt to different types of electric tools, the control device in the electric tool system does not set a control part for adjusting the working parameters of the electric tools, so that the control device can be matched with new electric tools which are updated more flexibly, the application range is improved, and the applicability is high.

Description

Control device and electric tool system
Priority from chinese patent application having application number 202010851578.3, filed on 12/13/2019, application number 201922242198.5 and filed on 01/22/2020, application number 202020145329.8 and filed on 21/08/2020, application number 202021772666.6 and filed on 21/08/2020, the entire contents of which are incorporated herein by reference.
Technical Field
The present invention relates to the field of electric tools, and in particular, to a control device and an electric tool system.
Background
The existing electric tool is usually directly connected and combined with the battery pack, so that the electric tool is large in size, the battery pack can move along with the electric tool body when the tool body is moved in the use process of a user, and the electric tool is inconvenient to carry and store. And when the user operates for a long time, the control is not easy, and the difficulty of fine operation is increased.
Therefore, there is a need for a control device and a power tool system to overcome the above-mentioned drawbacks.
Disclosure of Invention
In view of this, the embodiment of the present application provides an electric tool and a control device thereof, which have the advantages of wide application, smaller size, better human-machine experience, and high efficiency.
In order to achieve the purpose, the application provides the following technical scheme: a power tool system includes at least two kinds of power tools, a control device for cooperating with the power tools, and a battery pack serving as a power source,
the control device includes: the first shell is used for connecting a battery pack mounting part of the battery pack, the first control unit is arranged in the first shell and can control the battery pack to discharge, the first user operation unit is used for user operation to control the electric tool, and the first interface is electrically connected with the first user operation unit;
the electric tool includes: the working component, a second control unit arranged in the second shell and used for controlling the working component, and a second interface electrically connected with the second control unit;
the battery pack mounting portion includes a pair of guide rails along which the battery pack is slidable to engage or disengage the control device;
the first interface is connected with the second interface through a cable, so that the electric tool is electrically connected with the control device.
As a preferred embodiment, the first user operation unit includes a first switch for allowing or prohibiting the transmission of the electric power from the battery pack to the electric power tool.
As a preferred embodiment, the second control unit controls the operating parameters of the working component according to internally stored preset control instructions.
As a preferred embodiment, the electric power tool further includes a second user operation unit, the second user operation unit includes a second switch electrically connected to the second control unit, the second control unit enables the working component to be turned on or off according to an on-off state of the second switch, and/or the second user operation unit includes a second adjustment switch electrically connected to the second control unit, and the second control unit adjusts the working parameter of the working component according to an operation of the second adjustment switch by a user.
As a preferred embodiment, the working element comprises an electric motor or a heating or resistance wire.
The purpose is achieved, and the application further provides the following technical scheme:
a power tool system comprising a power tool, a control device for cooperating with the power tool, wherein the control device cooperates with a battery pack to provide power to the power tool,
the control device includes: the first control unit is arranged in the first shell, the first control unit is used for being connected with a battery pack mounting part of the battery pack, a first user operation unit is used for being operated by a user to control the electric tool, and the first interface is electrically connected with the first user operation unit;
the electric tool includes: the working component, a second control unit arranged in the second shell and used for controlling the working component, and a second interface electrically connected with the second control unit;
the battery pack mounting portion includes a pair of guide rails along which the battery pack is slidable to engage or disengage the control device;
the first interface is connected with the second interface through a cable, so that the electric tool is electrically connected with the control device;
the second control unit is electrically connected with the first user operation unit through the cable, obtains the operation of a user on the first user operation unit, and controls the working component according to the operation of the user on the first user operation unit.
In a preferred embodiment, the first user operation unit includes a first adjustment switch, and the second control unit detects an operation of the first adjustment switch by a user via the cable and generates a first adjustment signal for adjusting an operating parameter of the working member.
As a preferred embodiment, the cable is internally provided with 3 wires, wherein 2 wires are conductive wires for transmitting the power of the battery pack to the power tool, and 1 wire is a signal wire for electrically connecting the second control unit and the first regulating switch.
As a preferred embodiment, the second control unit adjusts the operating parameters of the operating element according to the first adjusting signal or controls the operating element according to internally stored preset control instructions.
In a preferred embodiment, the power tool further includes a second user operation unit for user operation to control an operation parameter of the working member.
As a preferred embodiment, the second user operation unit includes a second switch, and is electrically connected to the second control unit, and the second control unit controls the working component to be turned on or off according to an on-off state of the second switch.
As a preferred embodiment, the second user operation unit includes a second adjustment switch electrically connected to the second control unit, and the second control unit generates a second adjustment signal according to an operation of the second adjustment switch by a user, and selects one of the first adjustment signal and the second adjustment signal according to a preset priority to adjust the operating parameter of the operating component.
The purpose is achieved, and the application further provides the following technical scheme:
a control device for cooperation with at least two power tools, the power tools including a second control unit, the control device comprising:
a first housing;
a battery pack mounting portion including a pair of guide rails for detachably connecting a battery pack, the battery pack being slidable along the pair of guide rails to be engaged with or disengaged from the control device;
the first control unit is arranged in the first shell and used for monitoring at least one of voltage, current and temperature parameters of the battery pack, judging the working state of the battery pack and cutting off power transmission from the battery pack to the electric tool when the battery pack is abnormal;
the first interface is electrically connected with the electric tool through a cable, and the control device transmits electric energy to the electric tool through the first interface.
As a preferred embodiment, the electric power tool further includes an overcurrent protection unit for detecting a value of current flowing into the working member, and stopping the output of the working member when the value of the current is greater than a predetermined current value.
The purpose is achieved, and the application further provides the following technical scheme:
a control device for mating with a power tool, the power tool including a working element and a second interface, the control device comprising:
a first housing;
a battery pack mounting portion including a pair of guide rails for detachably connecting a battery pack, the battery pack being slidable along the pair of guide rails to be engaged with or disengaged from the control device;
the first control unit is arranged in the first shell and used for monitoring at least one of voltage, current and temperature parameters of the battery pack, judging the working state of the battery pack and cutting off power transmission from the battery pack to the electric tool when the battery pack is abnormal;
the first user operation unit is used for user operation and control;
the first interface is electrically connected with the first user operation unit through a cable, so that the electric tool is electrically connected with the control device, and the working part is controlled according to the operation of the user on the first user operation unit.
In a preferred embodiment, the electric power tool includes a second control unit electrically connected to the first user operation unit through the cable, and configured to acquire an operation of the first user operation unit by a user.
The control device provided by the above embodiment, by providing the first housing, the battery pack mounting part and the first interface, the electric tool does not need to be provided with the battery pack mounting part for connecting the battery pack, and by separately arranging the battery pack and the electric tool, on one hand, the volume and weight of the electric tool can be reduced, and the electric tool is convenient to carry and store; on the other hand, when the user is operating the electric tool, the user only needs to connect the electric tool with the control device through the cable, then places the control device on one side, is convenient for carry out the operation of becoming more meticulous, and because the cable can be crooked and have certain length, the distance between electric tool and the control device can change during the operation, and then it is more convenient to remove the electric tool, and human-computer experience is better.
In addition, the first user operation is arranged on the control device, a user can control the electric tool main body by operating the control device, the user operability is good, meanwhile, the electric tool main body can be selected not to be provided with the user operation unit, the function integration level of the electric tool main body is reduced, and therefore the reliability and the service life of the electric tool are improved.
The purpose is achieved, and the application further provides the following technical scheme:
a control device for adapting at least two types of power tools, the control device comprising:
a first housing;
a battery pack mounting portion including a pair of guide rails for detachably connecting a battery pack that is slidable along the pair of guide rails to be engaged with or disengaged from the control device;
the first control unit is arranged in the first shell and used for monitoring at least one of voltage, current and temperature parameters of the battery pack, judging the working state of the battery pack and cutting off power transmission from the battery pack to the electric tool when the battery pack is abnormal;
the first user operation unit is arranged on the first shell and is used for a user to operate so as to control a working component of the electric tool;
the first interface is electrically connected with the first user operation unit and is electrically connected with the electric tool through a cable.
Further, the first control unit is used for protecting the battery, and the electric tool includes a working member and a second control unit for controlling the working member.
Further, the first control unit is used for controlling the battery and working components of the electric tool, and the first control unit comprises an identification module which is used for identifying the type of the electric tool connected with the identification module so as to select working parameters matched with the electric tool.
Further, the first user operation unit includes a first switch for controlling an electrical connection between the battery pack and the power tool and/or a first adjustment switch for adjusting an operating parameter of the power tool.
The purpose is achieved, and the application further provides the following technical scheme:
a power tool system, comprising: a control device and an electric tool matched with the control device, wherein the electric tool at least comprises two types of electric tools,
the control device comprises a first shell, a battery pack mounting part, a first control unit, a first user operation unit and a first interface, wherein the battery pack mounting part is arranged on the first shell and is used for being connected with a battery pack, the first control unit is arranged in the first shell and can control the discharge of the battery pack, the first user operation unit is used for being operated by a user to control the electric tool, and the first interface is electrically connected with the first user operation unit;
the electric tool comprises a second shell, a working component and a second interface;
the battery pack mounting part comprises a pair of guide rails for detachably connecting a battery pack, and the battery pack can slide along the pair of guide rails so as to be engaged with or disengaged from the control device;
the first interface is connected with the second interface through a cable, so that the control device is electrically connected with the electric tool.
Further, the first control unit is used for protecting the battery, the electric tool comprises a second control unit used for controlling a working component, and the second control unit controls the working component according to a preset control instruction stored in the second control unit.
Further, the first user operation unit includes a first switch for controlling an electrical connection between the battery pack and the power tool and/or a first adjustment switch for adjusting an operating parameter of the power tool.
Furthermore, the electric tool comprises an electric tool without a second regulating switch and an electric tool with a second regulating switch, and the second regulating switch is used for regulating the working parameters of the second electric tool.
Further, the second adjusting switch is connected to the second control unit and is used for generating a second adjusting signal, and the first adjusting switch is used for generating a first adjusting signal;
and the second control unit receives the second adjusting signal and selects one of the first adjusting signal or the second adjusting signal according to a preset priority for adjusting the working parameters of the working component.
Further, the electric tool covers an electric tool without a motor and an electric tool with a motor, the motor is a brush motor or a brushless motor, the second control unit comprises a motor driving circuit, and the working parameters of the working component comprise any one of output torque, voltage, rotating speed and power of the motor.
Furthermore, the electric tool is an electric soldering iron, and the second control unit comprises a temperature control unit and a heating circuit.
Further, the first control unit comprises an identification module; for identifying the type of power tool connected thereto to select operating parameters that match the power tool.
Further, the at least two electric tools comprise at least two of an angle grinder, a straight grinder, a blower, a hot air gun and an electric soldering iron.
Furthermore, three wires are arranged inside the cable, wherein two wires are electric wires and are used for transmitting the electric power of the battery pack to the electric tool, one wire is a signal wire and is used for electrically connecting the tool control unit and the first user operation unit, and the tool control unit detects the control instruction input by the user through the signal wire.
By means of the technical scheme, the control device can be suitable for different types of electric tools. Through setting up first casing, battery package installation department and first interface for need not set up in the electric tool and be used for providing the power of electric power for the motor, also separately set up power and electric tool, so can reduce electric tool's volume.
According to the electric tool system, the control device is not provided with a control part for adjusting the working parameters of the electric tool, only takes charge of generating an adjusting signal to the electric tool, and the electric tool adjusts the working parameters of the electric tool according to the adjusting signal, so that the control device can be matched with a new updated electric tool more flexibly, the application range is improved, and the applicability is high; the repeated utilization of the control device can not only improve the adaptability of the control device in the embodiment of the application, but also reduce the production cost of the electric tool system.
On the other hand, when in operation, the second shell can be held by hand to operate the electric tool only by electrically connecting the other end of the cable with the motor of the electric tool, and the cable can be bent, so that the distance between the electric tool and the control device can be changed during operation, and the electric tool is convenient to move; the human-computer experience is better. The fork is because the electric tool of this application embodiment adopts brushless motor, therefore, efficient.
The application also provides a technical scheme that:
an electrical connector, comprising: a male connector; a female joint; one of the male connector and the female connector is used for connecting an electric tool, the other of the male connector and the female connector is used for connecting a control device, and the control device is provided with a mounting part used for connecting a battery pack; the male connector and the female connector are electrically and mechanically connected or disconnected, so that the electric tool receives the electric power transmitted from the control device through the electric connector; the male connector is provided with 3 terminals which are respectively a positive terminal, a negative terminal and a signal terminal.
Preferably, the maximum current allowed to flow through the positive terminal and the negative terminal is between 9A and 13A.
Compared with the prior art, the electric connector provided by the application realizes the power transmission between the electric tool provided with the control device of the battery pack and the large current requirement, and is high in safety.
Preferably, the male connector is a plug, and the female connector is a socket; the plug is provided with pins including a first pin configured as a positive terminal, a second pin configured as a negative terminal, and a third pin configured as a signal terminal.
Preferably, the first contact pin and the second contact pin are the same in shape and size; and the diameter of the first pin is between 1.98mm and 2.02 mm.
Preferably, the socket is provided with a jack matched with the contact pin; the plug pin fixing device is characterized in that a clamping piece used for clamping the plug pin is fixedly arranged in the plug hole, and the clamping piece is an elastic piece and made of a conductive material.
Preferably, the clamping diameter of the clamping piece in a natural state is between 1.9mm and 1.94 mm.
Preferably, the female connector is used for connecting a power tool, and the male connector is used for connecting the control device through a cable.
Preferably, the electrical connector is further provided with a holding unit for holding the male connector and the female connector in a connected state; the holding unit includes an elastic coupling portion provided on one of the male connector and the female connector, and a sub-coupling portion provided on the other of the male connector and the female connector for cooperating with the elastic coupling portion.
The male connector and the female connector are connected in a plugging mode, the holding force of the male connector and the holding force of the female connector in a connection state are maintained within a reasonable range, the reliability of large-current transmission is met, the operation of a user can be facilitated, and the user experience is improved.
The application also provides a technical scheme that: a controller for connection to a power tool for providing power to the power tool, the controller comprising: a control device provided with a battery pack mounting portion; an electrical connector comprising a male connector provided on one of the control device and the power tool and a female connector provided on the other of the control device and the power tool, the male connector being adapted to mate with the female connector; the male connector is provided with 3 terminals which are respectively a positive terminal, a negative terminal and a signal terminal; the control device comprises a first control unit and a first user operation unit; the signal terminal is electrically connected with the first user operation unit and used for transmitting an adjusting signal reflecting the first user operation unit to the electric tool.
Preferably, the male connector or the female connector is fixedly connected with the control device or fixedly connected with the control device through a cable.
The application also provides a technical scheme that: a power tool system, comprising: an electric tool; a control device provided with a mounting portion for connecting a battery pack; an electrical connector comprising a male connector and a female connector; one of the male connector and the female connector is used for connecting a power tool, and the other one of the male connector and the female connector is used for connecting a control device; the male connector is electrically and mechanically connected with the female connector, and the electric tool receives the electric power transmitted from the control device through the electric connector; the male connector is provided with 3 terminals which are respectively a positive terminal, a negative terminal and a signal terminal. The power tool system of claim 11, wherein the male connector is configured as a plug for connection to the control device via a cable, and the female connector is configured as a socket for connection to the power tool; the control device is provided with a first control unit and a first user operation unit, wherein the first user operation unit is electrically connected with the male connector; the electric tool is provided with a second control unit, and the female joint is electrically connected with the second control unit; when the male connector and the female connector are electrically and mechanically connected, the first user operation unit is electrically connected with the second control unit.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In the drawings:
FIG. 1 is a block schematic diagram of a power tool system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a control device according to an embodiment of the present application;
FIG. 3 is a schematic structural view of a power tool system according to an embodiment of the present application, wherein the control device is connected to the power tool via an electrical connector;
FIG. 4 is a schematic diagram of the power tool system of FIG. 3, wherein the control device is not coupled to the power tool;
fig. 5 is a schematic structural view illustrating a case of removing a half of a housing of an angle grinder when the power tool is the angle grinder in the power tool system according to the embodiment of the present invention;
FIG. 6a is a schematic diagram of the power tool system of FIG. 3, showing the electrical connector; FIG. 6b is a schematic view of the electrical connector shown in FIG. 6a, showing a female connector; FIG. 6c is a schematic view of the female connector shown in FIG. 6b, with respect to the structure of the clamping member;
FIG. 7 is a detailed view of the power tool system of FIG. 3 with the cable partially stripped;
FIG. 8a is a view of the electrical connector of FIG. 6a with the male connector shown from another perspective; FIG. 8b is a view of the electrical connector of FIG. 6a with the female connector from another perspective;
fig. 9 is a partial cross-sectional view of the electrical connector of fig. 6a, wherein the male connector is connected to the female connector.
10 is a schematic structural diagram of a straight grinding machine when the electric tool is a straight grinding machine in the electric tool system according to the embodiment of the present application;
FIG. 11 is a schematic view of the straight grinder of FIG. 10 with half of the housing removed;
FIG. 12 is a schematic view of a blower in the case where the power tool is a blower in the power tool system according to the embodiment of the present invention;
figure 13 is a schematic view of the blower of figure 12 with half of the housing removed;
FIG. 14 is a schematic view of a heat gun configuration of the power tool system according to the present embodiment when the power tool is the heat gun;
FIG. 15 is a schematic view of the heat gun of FIG. 14 with one half of the housing removed;
fig. 16 is a schematic structural diagram of an electric soldering iron when the electric tool is an electric soldering iron in the electric tool system according to the embodiment of the present disclosure;
fig. 17 is a schematic structural view of the electric soldering iron shown in fig. 16 with a half of the housing removed.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to limit the application of the present control device and power tool system.
Referring to fig. 1 and 4, one embodiment of the present application provides a control device 12 for cooperating with a battery pack 27 to provide power to a power tool 11. The control device 12 includes a first housing 15, a battery pack mounting portion 25 for connecting a battery pack 27, a first control unit 120 that is provided in the first housing 15 and can control discharge of the battery pack 27, and a first user operation unit 121 that is operated by a user to control the electric power tool 11. The first housing 15 includes a first housing portion 151 and a second housing portion 152. The battery pack mounting portion 25 is provided on the second case portion 152, may be integrally formed with the second case portion 152, or may be fixedly provided on the second case portion 152. The battery pack mounting portion 25 includes a pair of guide rails along which the battery pack 27 can slide to engage or disengage the control device 12. Of course, the battery pack 27 may be detachably connected to the battery pack mounting portion 25 by other means.
The first control unit 120 is connected to the battery pack 27, and may control the battery pack 27 to discharge for protecting the battery pack 27. When the first control Unit 120 detects an abnormality of the battery pack 27, for example, the battery pack 27 is over-temperature, under-voltage or over-current, the first control Unit 120 may stop discharging the battery pack 27 by cutting off an external power supply loop of the control device 12.
The first user operation unit 121 is disposed on the first housing 15, and a user can control the operation of the electric tool 11 by manipulating the first user operation unit 121. The first user operating unit 121 includes a first switch 28, the first switch 28 is disposed on the first casing 15, and is located on the external power supply circuit of the control device 12 for controlling the power output from the battery pack 27 to the power tool 11.
The control device 12 further includes a first interface 21 electrically connected to the first user operating unit 121 for connecting the power tool 11 via the cable 23, so that the first user operating unit 121 is connected to the power tool 11 for controlling the operation of the power tool 11. When the power tool 11 is used, the control device 12 can be electrically connected to the power tool 11 through the cable 23, and the battery pack 27 can provide power for the power tool 11. During operation, the user only needs to hold the electric tool 11 body to operate, and the battery pack 27 and the control device 12 can be placed aside, and the weight of the battery pack 27 is not required to be borne, so that the electric tool 11 is convenient to be used for fine operation.
The control device 12 provided above is capable of adapting to different kinds of electric tools. The electric tool herein refers to a tool driven by electric power, including but not limited to: angle grinder, straight grinder, hot air gun, blower, electric iron, blowing and sucking machine, paint spray gun, etc. It can be seen that the power tool may be a motorized power tool, such as an angle grinder, a straight grinder, or the like. Or may be a power tool without a motor, such as an electric soldering iron or the like. In this way, the control device 12 can be reused, which not only improves the adaptability of the control device 12 described in the embodiment of the present application, but also reduces the production cost of the electric tool system.
Referring to fig. 1 and 4, a power tool is illustrated. The electric tool 11 is provided with a second interface 22, and the first interface 21 can be connected with the second interface 22 through a cable 23, so that the control device 12 is electrically connected with the electric tool 11.
The power tool 11 further includes a second housing 18, a working member 112, and a second control unit 110 disposed in the second housing 18 for controlling the working member 112. The working member 112 is different according to the type of the electric tool, for example, an electric tool includes a motor, and the working member 112 includes a motor. Such as angle mills, straight mills, hot air guns, blowers, etc. If the power tool is not provided with a motor, the working element 112 may include a resistance wire, a heating wire, etc., such as an electric soldering iron, etc.
The second control unit 110 is electrically connected to the second interface 22, and when the first interface 21 is connected to the second interface 22 through the cable 23, the second control unit 110 in the power tool 11 can be electrically connected to the first user operation unit 121 in the control device 12. When the first interface 21 is connected with the second interface 22 through the cable 23, the user operates the first switch 28, and when the first switch 28 is closed, the first interface 21 can obtain power from the battery pack, so that the electric tool 11 can obtain the power from the control device 12 through the cable 23, and the electric tool 11 can start the working component 112 to work after obtaining the power; the on-off state of the first switch 28 can be detected by the first control unit 120 in the control device 12, when the first switch 28 is detected to be closed, the first control unit 120 controls the battery pack 27 to output electric energy outwards, so that the electric tool can obtain the electric energy from the control device through a cable, and after the electric tool 11 obtains the electric energy, the second control unit 110 controls the working component 112 to start working; in addition, the second control unit 110 in the power tool 11 can also detect the on-off state of the first switch 28 through a cable, and when the first switch 28 is detected to be closed, the second control unit controls the working component 112 to start working. In this embodiment, the second control unit 110 may automatically control the operating parameters of the operating component 112 according to a preset control instruction stored inside. Here, the operation parameter is different depending on the kind of the electric tool, for example, the electric tool 11 includes a motor, and the operation parameter includes any one of output torque, voltage, rotation speed and power of the motor; if the power tool does not include a motor, the operating parameters include the temperature of the resistance wire, the heating wire, and the like.
In one embodiment, the first user operating unit 121 further includes a first adjusting switch 35, the first adjusting switch 35 is operable by a user to control the working part 112 of the power tool 11, for generating a first adjusting signal for adjusting the working parameter of the power tool 11 and sending the first adjusting signal to the power tool 11, or the power tool 11 actively acquires the first adjusting signal, so that the power tool 11 can adjust the working parameter of the power tool 11 according to the adjusting signal. The first adjustment switch 35 may be a manual adjustment button for manual adjustment by a user. The first adjustment signal may be a throttle signal, a temperature adjustment signal, or other signal to be adjusted. In one embodiment, the first adjustment switch 35 is used to generate the throttle signal. Specifically, the first adjusting switch 35 is a speed adjusting button, and when the user presses the first adjusting switch 35 during operation, the second control unit 110 can obtain a control instruction of the user through the cable 23 and adjust the operating parameter of the operating component 112 according to the control instruction of the user. Therefore, the speed regulation function of the main body of the electric tool 11 is integrated on the control device 12, that is, the control device 12 can be adopted to output the speed regulation signal to the electric tool 11, and the electric tool 11 does not need to be integrated with the speed regulation function.
In another embodiment, the first regulation switch 35 is used to generate a tempering signal. Specifically, the first adjusting switch 35 is a temperature adjusting button, and when the first adjusting signal is a temperature adjusting signal, the temperature adjusting function of the main body of the electric tool 11 is integrated on the control device 12, that is, the control device 12 can be adopted to output the temperature adjusting signal to the electric tool 11, and further the electric tool 11 does not need to be integrated with the temperature adjusting function.
The control device 12 is not provided with a control part for adjusting the working parameters of the electric tool 11, and is only responsible for generating an adjusting signal to the electric tool 11, the control function is still assumed by the electric tool 11, and the electric tool 11 adjusts the working parameters thereof according to the adjusting signal. Specifically, the first control unit 120 is used for protecting the battery pack 27, and as described above, the electric power tool 11 includes the working part 112 and the second control unit 110, and the second control unit 110 is used for controlling the working part 112. Because different electric tools and newer electric tools usually have different working parameters, if the control function is integrated on the control device 12, the control device is bound to store a lot of control strategies for selection, and for newer products, the old control device is either abandoned or the configuration needs to be upgraded so as to match with the new electric tool products, so that the control device 12 needs to be adjusted and even replaced frequently, and in the present application, the control function is still placed on the electric tool 11, and the control device 12 is only responsible for generating an adjustment signal to the electric tool 11, so that the control device 12 can be matched with the newer and newer electric tools more flexibly, the application range is improved, and the applicability is high; the repeated utilization of the control device 12 not only can improve the adaptability of the control device 12 of the embodiment of the application, but also can reduce the production cost of the whole system.
The control device 12 provided in the above embodiment, by providing the first housing 15, the battery pack mounting portion 25 and the first interface 21, the electric tool 11 does not need to be provided with the battery pack mounting portion 25 for connecting the battery pack 27, and by separately providing the battery pack 27 and the electric tool 11, on one hand, the volume and weight of the electric tool 11 can be reduced, and the control device is convenient to carry and store; on the other hand, when the user operates the electric tool 11, the user only needs to connect the electric tool 11 with the control device 12 through the cable 23, and then places the control device 12 on one side, so as to be convenient for fine operation, and because the cable 23 can be bent and has a certain length, the distance between the electric tool 11 and the control device 12 can be changed during operation, so that the electric tool 11 is more convenient to move, and the human-computer experience is better. In addition, by providing the first user operation unit 121 on the control device 12, the adjusting function of the main body of the electric tool 11 can be integrated into the control device 12, that is, the control device 12 can be used to output an adjusting signal to the electric tool 11, and further, the electric tool 11 does not need to be integrated with the adjusting function, so that the function integration level of the main body of the electric tool 11 is reduced, and the reliability and the service life of the electric tool 11 are improved.
In this way, the control device 12 can be reused, which not only improves the adaptability of the control device 12 of the embodiment of the present application, but also reduces the production cost of the electric tool system.
The embodiment of the present application further provides an electric tool system, which includes the above-mentioned control device 12 and an electric tool 11 matched with the control device 12. The power tool 11 includes, but is not limited to: angle grinder, straight grinder, hot air gun, blower, electric iron, blowing and sucking machine, paint spray gun, etc. The power tool includes a second housing 18, a working member 112, and a second interface 22; the first interface 21 is connected to the second interface 22 through the electrical connector 30, so that the control device 12 is electrically connected to the power tool 11. The first control unit 120 is used for protecting the battery pack 27, the electric power tool 11 includes a second control unit 110 for controlling the working part 112, and the second control unit 110 controls the working part 112 according to a preset control instruction stored inside.
In one embodiment, the power tool 11 encompasses at least two types of power tools.
In one embodiment, the electric tool comprises an electric tool without a second regulating switch and an electric tool with a second regulating switch, and the second regulating switch is used for regulating the working parameters of the electric tool. The second adjusting switch is connected to the second control unit and used for generating a second adjusting signal, and the first adjusting switch is used for generating a first adjusting signal; the second control unit receives the second adjusting signal and selects one of the first adjusting signal or the second adjusting signal according to a preset priority for adjusting the working parameter of the working component.
In one embodiment, the electric tool includes an electric tool not provided with the second control unit and an electric tool provided with the second control unit. For the electric tool provided with the second control unit, the second control unit controls the working part according to a preset control instruction stored in the second control unit; for the electric tool without the second control unit, the control device can transmit power to the electric tool, and the first user operation unit 121 on the control device can control the work of the electric tool.
In one embodiment, the electric tool includes an electric tool without a motor and an electric tool with a motor, the motor is a brush motor or a brushless motor, the second control unit includes a motor driving circuit, and the operating parameter of the operating component includes any one of output torque, voltage, rotation speed and power of the motor.
When the electric tool is an electric tool without a motor, such as an electric iron, the electric tool comprises an iron core and an iron head, the working part of the electric tool is the iron core, and the second control unit comprises a temperature control unit and a heating circuit.
In one embodiment, at least two first interfaces 21 may be disposed on the control device 12, and each first interface 21 may be connected to one power tool 11 through a cable 23, so that the control device 12 may simultaneously supply power to a plurality of power tools 11. It is understood that when a plurality of first interfaces 21 are provided on the control device 12, the specific structural form of the plurality of first interfaces 21 may be different, or the structural form of each first interface 21 may be the same.
In one embodiment, the control device 12 may further include a charging port and a power conversion circuit connected to the charging port, the power conversion circuit being connected to the battery pack 27 or the first interface 21. The charging port is used for connecting an external power supply, the external power supply can charge the battery pack 27 through the power conversion circuit, or the electric power of the external power supply is converted by the power conversion circuit and then supplies power to the electric tool 11 through the first interface 21.
In one embodiment, the control device 12 may further include at least one third interface for connecting an external ac power source and may be connected to the power tool via a cable for supplying ac power to the power tool. In the above embodiment, the control device 12 may be connected to a plurality of electric tools 11 and simultaneously supplies power to the plurality of electric tools 11, and the control device 12 may supply direct current power or alternating current power to the electric tools 11, so that the power supply mode is multiple and the use is convenient.
The following description will be made separately for different electric tools. As shown in fig. 3 to 5, the power tool 11 is exemplified by an angle grinder.
As shown in fig. 1, 3-5, the electric power tool 11 includes a second housing 18, a working component 112 (in the present embodiment, the working component 112 is the motor 16) disposed in the second housing 18, a second control unit 110, and a second interface 22 disposed on the second housing 18. Specifically, the second housing 18 has a hollow structure. The hollow portion forms a receiving cavity. The motor 16 is accommodated in the accommodating cavity, so that the motor 16 can be protected through the second shell 18, and the safety is improved. Further, the power tool 11 further includes a driving circuit, and the second control unit 110 controls the motor 16 to operate by controlling the driving circuit. The second interface 22 disposed on the second housing 18 is electrically connected to the second control unit 110, and when the second interface 22 is electrically connected to the first interface 21 through the cable 23, the first user operating unit 121 can be electrically connected to the second control unit 110 through the cable 23. The control device 12 is electrically connected to the power tool 11.
As shown in fig. 4, the cable 23 has a first end connected to the control device 12 and a second end connected to the power tool 11. In the present embodiment, the first end of the cable 23 is fixedly connected to the control device 12, and the conductive wire inside the cable is electrically connected to the first control unit. The second end of the cable 23 is detachably connected to the power tool 11.
The second end of the cable 23 is connected to the power tool 11 through the electrical connector 30. Referring to fig. 4 and 6a, the electrical connector 30 includes a male connector 32 and a female connector 34. The male connector 32 is used for connecting with the control device 12, and the female connector 34 is used for connecting with the electric tool 11. When the male connector 32 and the female connector 34 are electrically and mechanically connected, the power tool 11 receives the power transmitted from the control device 12 through the electrical connector 30.
The male connector is provided with 3 terminals, namely a positive terminal, a negative terminal and a signal terminal. Wherein the positive terminal and the negative terminal are power supply terminals for transmitting the power of the battery pack 27 mounted on the control device 12 to the electric power tool 11; the signal terminal is used to transmit an electric signal reflecting a specific operation of the first user operation unit by the user to the power tool 11. In the present embodiment, the male connector 32 is configured as a plug, and is connected to the control device 12 through the cable 23; the female connector 34 is configured as a socket.
Specifically, as shown in fig. 6a, the male connector 32 includes a third housing having a first barrel portion 321 and a second barrel portion 322. Wherein, the first cylinder 321 is hollow cylinder and has a pin fixed inside; the second barrel portion 322 is for accommodating the cable 23.
In this embodiment, the number of pins is 3, and the pins are the first pin 323, the second pin 324 and the third pin 325. Of these, 3 pins are arranged in parallel, and the first pin 323 and the second pin 324 are configured as power terminals for transmitting power of the battery pack 27 mounted on the control device 12 to the power tool 11; the third pin 325 is configured as a signal terminal for transmitting an electric signal reflecting the operation of the first user operation unit 121 to the power tool 11. Here, the first pin 323 is defined as a positive terminal, the second pin 324 is defined as a negative terminal, and the third pin 325 is defined as a signal terminal.
Correspondingly, as shown in fig. 7, 3 conducting wires 232 are arranged inside the cable 23, wherein two conducting wires are conductive wires and are respectively communicated with the first pin 323 and the second pin 324; one of the conductors is a signal line that communicates with the third pin 325.
As shown in fig. 6a, 6b, the female connector 34 comprises a fourth housing having a rear portion 341 for form-fitting with the first barrel portion 321, a front portion 342 remote from the rear portion 341 and a shoulder 343 connecting the rear portion 341 and the front portion 342. Wherein the rear portion 341, the front portion 342 and the shoulder 343 are substantially cylindrical in shape, in a stepped arrangement; and all three are made of a non-conductive material, the shoulder 343 having a larger radial dimension than the front 342 and rear 341 portions. The rear portion 341 is provided with 3 jacks for matching with the shape of the contact pin; and, a clamping piece 344 for clamping the pin is fixedly arranged inside each jack, and the other end of the clamping piece 344 passes through the shoulder 343 and the front 342 and protrudes out to form a terminal for connecting the power tool 11. Here, the sockets adapted to the first pin 323, the second pin 324, and the third pin 325 are defined as a first socket 345, a second socket 346, and a third socket 347, respectively.
Referring to fig. 6c, the clamping member 344 extends along the longitudinal direction and has a first end 3441 and a second end 3442 in the extending direction. The first end 3441 has a hollow cylindrical structure, and the outer wall thereof is provided with cutting grooves 3443 at intervals along the circumferential direction. In the present embodiment, the number of the cutting grooves 3443 is 2, and the cutting grooves 3443 are provided at an interval of 180 degrees. The second end 3442 is semi-cylindrical for connection to the power tool 11. In a natural state, i.e., when the needle is not inserted into the first end 3441, the clamping diameter of the clamping member 344 is the smallest; when the pin is inserted, the clamp 344 is spread open and the clamping diameter increases.
As shown in fig. 6a, the contour of the first pin 323, the second pin 324 and the third pin 325 approximately form an isosceles triangle by projecting the pins to a plane perpendicular to the extending direction thereof; the distance L3 between the first pin 323 and the second pin 324 is 6.4mm, and the distance L4 between the first pin 323 and the third pin 325 is equal to the distance L5 between the second pin 324 and the third pin 325, which are both 5 mm. Correspondingly, as shown in fig. 6b, the contour of the first jack 345, the second jack 346 and the third jack 347 approximately form an isosceles triangle by projecting the jacks to a plane perpendicular to the extension direction thereof.
In the present embodiment, the inner diameter of the first cylindrical portion 321 is 12.7 mm; correspondingly, the outer diameter of the rear portion 341 is 12 mm.
In one possible embodiment, the male connector 32 may be connected to the power tool 11, and the female connector 34 may be connected to the control device 12, as long as the male connector and the female connector are matched with each other to transmit the power of the battery pack 27 to the power tool 11 through the control device 12.
In the present embodiment, the male connector 32 is fixedly connected to the control device 12 via the cable 23, and the female connector 34 is fixedly connected to the electric power tool 11. With this arrangement, when it is necessary to disconnect the control device 12 from the power tool 11, the male connector 32 and the female connector 34 are simply separated.
At this time, the electric power from the battery pack 27 needs to be transmitted to the electric power tool 11 via the cable 23 and the electric connector 30. Generally, the maximum current allowed to flow through the wires in the cable 23 is 10A, which can meet the power requirements of different types of power tools 11. However, in the existing electrical connector, the radial size of the contact pin is usually not larger than 1.5mm, the allowed maximum current is not larger than 6A, and the large current requirement of a specific electric tool cannot be met; otherwise, the electrical connector 30 will heat up severely and be unsafe.
For this reason, in the electrical connector 30 of the present application, the power terminals for transmitting power from the battery pack 27, i.e., the first and second pins 323 and 324, have a diameter of 1.98mm to 2.02 mm. The maximum current allowed to flow through the first and second pins 323, 324 is between 9A-13A. Preferably, the maximum current allowed to flow through the first and second pins 323, 324 is between 10A-12A.
Preferably, the first and second pins 323, 324 have a diameter of 2 mm. The third pin 325 is used for transmitting signals, and the value of the current flowing through the third pin is small, and the diameter of the third pin is only 1mm-1.2 mm. Of course, the third pin 325 may have the same diameter size as the first and second pins 323 and 324 in view of convenience in manufacturing.
Further, in order to ensure the safety of power transmission during the operation of the electric tool 11 and prevent the male connector 32 and the female connector 34 from being easily released, the male connector 32 and the female connector 34 of the present embodiment are in an interference fit. Specifically, as shown in fig. 6a and 6c, in the male connector 32, the diameters of the first pin 323 and the second pin 324 are between 1.98mm and 2.02 mm; in the female connector 34, the holding diameter of the holding member 344 for holding the first and second pins 323 and 324 is 1.9mm to 1.94 mm. The clamping diameter here refers to the clamping diameter of the clamping member 344 in the natural state.
In one possible embodiment, the electrical connector 30 is further provided with a retaining unit for maintaining the connection between the male connector 32 and the female connector 34 without being easily released.
As shown in fig. 6a, 9, the holding unit includes an elastic coupling portion 36 provided on the female connector 34 and a sub-coupling portion 38 provided on the male connector 32. Wherein, the elastic coupling part 36 is a metal sheet structure, and is integrally wavy and arranged on the outer surface of the rear part 341; the sub coupling portion 38 is a groove recessed inward from the outer surface of the first cylinder portion 321. When the male connector 32 and the female connector 34 are mated, i.e. the first cylindrical portion 321 is inserted into the rear portion 341, the elastic coupling portion 36 and the secondary coupling portion 38 are engaged with each other, and are elastically deformed by the secondary coupling portion 38.
In one possible embodiment, as shown in fig. 9, the distance L1 by which the secondary coupling portion 38 is recessed downward from the outer surface of the first cylinder portion 321 is 1.1 mm; the distance L2 between the wave crest and the wave trough of the elastic coupling part 36 is 1.3 mm; when the elastic coupling portion 36 is engaged with the sub-coupling portion 38, the peak of the elastic coupling portion 36 is elastically deformed to be approximately horizontal, and the distance from the peak to the trough is reduced to 0.7mm, that is, the deformation amount of the peak is 0.6 mm; at this time, one end of the peak abuts against the first inclined surface of the groove 38, and the other end abuts against the second inclined surface of the groove 38. When the user needs to disconnect the male connector 32 from the female connector 34, it must provide sufficient pull-out force to further deform the resilient coupling 36.
It is contemplated that the deeper the secondary coupling portion 38 is recessed downward, the greater the force to separate the male connector 32 from the female connector 34, and in this embodiment, the distance the secondary coupling portion 38 is recessed downward is between 1.05mm and 1.15 mm.
In a possible embodiment, the elastic coupling portion 36 may be provided on the male connector 32 and the secondary coupling portion 38 may be provided on the female connector 34. The present application is not limited thereto.
As mentioned above, in order to avoid the easy release between the male connector 32 and the female connector 34, the holding force for maintaining the two in the connection state cannot be too small; however, in order to satisfy quick attachment/detachment, the holding force for maintaining the male connector 32 and the female connector 34 in the connected state may not be too large. Therefore, the holding force between the male connector 32 and the female connector 34 needs to be arranged within a reasonable range.
In this embodiment, the retention force between the male connector 32 and the female connector 34 is between 55N and 65N. That is, a force greater than 55N must be provided when the user needs to separate the power tool 11 from the control device 12.
Of course, the cable 23 may be detachably connected to the power tool 11 by other means, and the present application is not limited thereto.
In a possible embodiment, the cable 23 can be provided independently of the control device 12. That is, one end of the cable 23 is detachably connected to the control device 12, and the other end of the cable 23 is detachably connected to the electrical connector 30. An electrical connector 30 as described above may also be provided between one end of the cable 23 and the control device 12.
In the present embodiment, the first control unit changes the operating speed of the motor 16 by controlling the operating parameters of the motor 16 of the electric power tool 11. The operating parameter includes, but is not limited to, a voltage of the motor 16, a current of the motor 16, or a combination of a voltage and a current of the motor 16. No provision is made for this application. The first control unit may be a circuit module including a single chip microcomputer.
In the present embodiment, the first user operation unit includes the first switch 28 and the first adjustment switch 35. Wherein the first adjustment switch is a manual speed knob 35. The manual speed knob 35 is operable by a user to adjust the speed of the motor 16.
As shown in fig. 2, a first switch 28 is provided on the first housing 15 for controlling the transmission of power from the battery pack 27 to the power tool 11, thereby controlling the turning on and off of the motor 16. In use of the power tool 11, power flows from the battery pack 27 to the motor 16 via the control device 12 by the user simply activating the first switch 28 on the first housing 15.
However, some electric tools, such as the angle grinder in this embodiment, require frequent changes in the operating state of the motor 16. If the switch 28 for controlling the start and stop of the motor 16 is provided on the control device 12, although the structure of the electric power tool 11 is simplified, the operation is somewhat inconvenient. Since the user holds only the power tool 11 itself when performing a specific operation, the control device 12 is placed aside by the cable 23; when it is necessary to change the operating state of the motor 16, the user must go to the place where the control device 12 is placed to operate the control device 12 to control the motor 16.
To this end, in one embodiment, the power tool 11 further includes a second user operation unit 111 for user operation to control the operation of the power tool.
The second user operation unit 111 includes a second switch, and is disposed on the second housing 18 and electrically connected to the second control unit 110, and the second control unit 110 can control the working component 112 (the motor 16) to be turned on or off according to the on/off state of the second switch. When the user holds the second housing 18, the second switch is controlled to turn the working element 112 on and off. The second switch may be a membrane switch. Of course, the second switch is not limited to be a membrane switch, and may be other switches, such as a light-sensitive switch, which is not specified in this application. In operation, the user operates the first switch 28, at which time the battery pack 27 may transmit power to the power tool 11, and then operates the second switch to activate the working element 112. When it is desired to stop the working part 112, only the second switch needs to be operated.
Of course, the first switch and the second switch are provided in the first casing 15 and the second casing 18, respectively. In a possible embodiment, it may also be provided that the transmission of power from the battery pack 27 to the power tool 11 only takes place after the first switch has been operated and the second switch has been operated. At this time, the motor 16 is stopped by operating any of the switches.
The second user operating unit 111 further includes a second adjusting switch, which is disposed on the second housing 18 and may be a manual speed adjusting button, so that a user can manually operate the second adjusting switch. The second adjusting switch is electrically connected to the second control unit 110, and the second control unit 110 may generate a second adjusting signal according to a user operation on the second adjusting switch. The second control unit 110 may select one of the first adjustment signal or the second adjustment signal to adjust the operating parameter of the operating member 112 according to a preset priority. For example, when the priority of the second adjustment signal is higher than the priority of the first adjustment signal, the control unit ignores the first adjustment signal and adjusts the operating parameter of the operating member 112 according to the second adjustment signal; when the priority of the first adjustment signal is higher than the priority of the second adjustment signal, the control unit ignores the second adjustment signal and adjusts the operating parameter of the operating member 112 according to the first adjustment signal. When the power tool 11 is a small handheld power tool, it is preferred that the second adjustment signal has a higher priority than the first adjustment signal in order for the user to adjust the operating parameters of the motor 16 while the handheld power tool 11 is in operation.
In the electric tool system provided by the above embodiment, the first adjusting switch 35 is disposed on the control device 12, so that the control device 12 can be adapted to both the electric tool 11 without the adjusting switch and the electric tool 11 with the adjusting switch, the adaptability of the control device 12 can be improved, and the production cost of the electric tool system can be reduced. By arranging the second adjusting switch on the electric tool 11, the user can adjust the working parameters of the working component 112 on the electric tool 11, and the operation of the handheld electric tool is more convenient.
In one possible embodiment, the second switch may also be provided only on the second housing 18 of the power tool 11. The second switch is used to control the turning on and off of the motor 16. When the user holds the second housing 18, the second switch controls the motor 16 to be turned on and off.
In the present embodiment, as shown in fig. 3, the control device 12 further includes 2 USB output interfaces 26, and the USB output interfaces 26 are disposed on the side of the control device 12. The USB output interface 26 outputs a target voltage for charging an external power device such as a cellular phone. To this end, the first control unit further comprises a voltage conversion module for converting the supply voltage of the battery pack 27 into a target voltage.
The magnitude of the target voltage is set according to the requirements of the external device. In one possible embodiment, the USB output interface 26 may output power with a target voltage value of 5V and a current of 1A.
For safety reasons, an operating button may also be provided on the control device 12. When the control device 12 is connected to the battery pack 27 through the battery pack mounting portion 25, the user needs to first operate the operation button to supply power to the external device through the USB output interface 26.
When the control device 12 is connected to the battery pack 27 and charges the external device through the USB output interface 26, the control device 12 may also be connected to the power tool 11 through the cable 23 to supply power to the power tool 11 and control the operation of the power tool 11. Of course, the control device 12 may alternatively charge an external device or supply power to the power tool 11.
In order to adapt to the interface TYPEs of different external devices, the control device 12 may also be provided with other TYPEs of output interfaces, such as a TYPE-C interface, or a combination of a USB interface and a TYPE-C interface, which is not limited in this application.
In the present embodiment, as shown in fig. 2, the battery pack mounting portion 25 is provided on the first case 15. Specifically, the battery pack mounting portion 25 is disposed at the lower side of the first housing 15, and the battery pack mounting portion 25 is slidably coupled to the battery pack 27. When the battery pack 27 is connected to the battery pack mounting portion 25 and the control device 12 is connected to the electric power tool 11 through the cable 23, the battery pack 27 forms a loop with the first control unit and the motor 16; so that the battery pack 27 can provide power to the motor 16. The control device 12 is configured such that the battery pack 27 is provided separately from the power tool 11. That is, the control device 12 externally arranges the battery pack 27 with respect to the electric power tool 11. Compared with the electric tool in the prior art, the electric tool of the embodiment has the advantages of smaller volume, lighter operation and better man-machine experience.
In the present embodiment, the battery pack 27 has a battery capacity of 2 AH.
In one possible embodiment, as shown in fig. 3, the control device 12 of the present embodiment further includes: a battery pack 27 for connection to the battery pack mounting portion 25.
In a possible embodiment, the first control unit may further include a temperature detection module and an overload protection module. Specifically, the temperature detection module is used for detecting the working temperature of the first control unit. The overload protection module is configured to cut off the power supply or switch the operation mode of the motor 16 when the operating current of the first control unit exceeds a preset value.
The brushless motor has strong load capacity; moreover, the brushless motor has a smaller structural size than the brush motor under the same power. For this reason, the electric power tools of the present embodiment each employ a brushless motor as a drive source. The brushless motor has a diameter D1 of between 17-28 mm. Further, the diameter of the brushless motor is not more than 25 mm.
Therefore, compared with the prior art electric tool powered by the battery pack with the capacity of 2AH battery, the electric tool provided by the embodiment of the application has smaller motor size and even structural size. Compared with an electric tool with a small structural size, the electric tool provided by the embodiment of the application can be powered by a battery pack with larger capacity.
Of course, the brush motor may be selected as the drive source according to the operating characteristics of different electric tools.
In one possible embodiment, the brushless motor is an external rotor brushless motor.
The angle grinder in this embodiment is shown in fig. 5. The output shaft of such a power tool outputs a rotational motion to drive the working head 45 to perform a specific operation. Such as cutting or grinding glass reinforced plastic workpieces with an angle grinder. The motor 16 is an external rotor brushless motor.
The housing 18 includes a first tubular portion 17 and a second tubular portion 19 for housing the motor 16 and the transmission 14. The second canister portion 19 is configured as a handle for grasping by a user. The first cylindrical portion 17 includes a motor housing 170 for housing the motor 16 and a transmission housing 171 for housing the transmission mechanism 14. Also, the radial dimension of the transmission housing 171 is smaller than the radial dimension of the motor housing 170; the first tubular portion 17 is arranged substantially in the vertical direction and the second tubular portion 19 is arranged substantially in the horizontal direction.
Since the control unit and the power supply are provided independently of the power tool 11, the size of the power tool 11 can be reduced. In the present embodiment, the dimension L6 of the second cylindrical portion 19 in the horizontal direction is 80 to 150 mm. That is, when the user grips the second canister 19, the user's hand grips almost most of the second canister 19. At the same time, in order to guarantee a good gripping experience, the radial dimensions of the second cylindrical portion 19 should be set within reasonable limits. In the present embodiment, the diameter D2 of the second cylindrical portion 19 is between 25 and 41mm, and the ratio of the battery capacity to the grip size is between 2/25 and 2/41.
As shown in FIG. 5, the angle grinder can actually perform a cutting operation during a cutting process, namely, a part of the working head 45, which exceeds the outer wall of the transmission housing 171. In other words, in the case that the radial dimension of the working head 45 is relatively fixed, the greater the distance L2 between the motor axis X1 and the outer wall of the transmission housing 171, the smaller the thickness of the workpiece that can be cut by the working head 45. In the present embodiment, the distance L7 between the motor axis X1 and the outer wall of the transmission housing 171 is between 10 and 18 mm.
As shown in fig. 10 to 11, when the power tool 11 is a power tool with a motor, the power tool 11 may also be a direct grinder. Similar to the angle grinder, the output shaft of the straight grinder also outputs rotary motion, so that the working head is driven to complete specific operation. Such as surface grinding of a workpiece with a straight grinder.
The second housing 18 of the direct grinding machine 11 is a cylindrical housing extending in the longitudinal direction, which provides a grip portion 180 for a user to grip, and the housing 18 accommodates the motor 16 inside. The end of the second housing 18 opposite the working head is provided with a second interface 22 for connecting a cable 23.
The direct grinding machine adopts a brushless motor as a driving source, and the diameter D3 of the holding part 180 is 23-34 mm. The dimension L3 of the housing 18 in the longitudinal direction is between 120 and 180 mm.
As shown in fig. 12-13, the power tool 11 may also be a blower. The blower operates in a manner to output an air flow to the outside. An air outlet 19 is arranged on a second shell 18 of the blower, and a motor 16 and a fan 13 are also arranged in the second shell 18. The fan 13 is driven by the motor 16 to rotate, and generates airflow. A second interface 22 is arranged at the other end of the second casing 18 opposite to the air outlet, and is used for connecting a cable 23.
In a possible embodiment, the fan 13 is a centrifugal fan.
In this embodiment the hair dryer is without the second user operated unit and may be controlled by the first user operated unit on the control device 12 if speed regulation is required.
As shown in fig. 14-15, the power tool 11 is a heat gun. The working mode of the heat gun is to output hot air to the outside. The second shell 18 is provided with an air outlet 19; the second housing 18 also houses the motor 16, the resistance wire 17 and the fan 13. The fan 13 is driven by the motor 16 to rotate to generate air flow; the resistance wire 17 receives the electric power of the battery pack 27 to generate heat, and heats the airflow generated by the fan 13. On the flow path along the air flow, the resistance wire 17 is arranged closer to the air outlet 19 than the fan 13; in this way, the air flow generated by the fan 13 can be heated by the resistance wire 17 while flowing through the air outlet 19. The hot air gun selects a brush motor as a driving source.
In the electric tool such as the direct grinding machine and the angle grinding machine, the working head is driven by the motor 16 to rotate to complete a specific operation, and the electric power of the battery pack 27 is mainly used for driving the motor 16 to rotate. In the heat gun, the electric power of the battery pack 27 is supplied to the resistance wire 17 for heating, in addition to the electric power for driving the motor 16 and the fan to rotate to generate the air current. It should be noted that the power supplied by the battery pack 27 to the resistance wire 17 is also transmitted through the aforementioned conductive wire 232 for supplying power to the motor 16.
In the present embodiment, the second control unit and the second user operation unit may not be provided in the electric power tool 11; the power tool 11 is controlled to start and stop by a first user operation unit 121 provided on the control device 12. The control device 12 performs a function of transmitting electric power thereto, and does not involve a function of controlling the rotational speed or the like. However, if the heat gun needs to adjust the temperature and the wind speed, the working parts include the motor and the resistance wire.
When the electric tool 11 is a heat gun, a temperature protection module is further disposed inside the housing 18. When the temperature of the air flow is higher than the preset temperature, the temperature protection module works to cut off the power transmitted to the motor 16 and the resistance wire 17.
In the above embodiment, the working component 112 of the electric tool is the motor 16, and the second control unit 110 can be connected to the first regulating switch 35 or the second regulating switch through the cable 23, and regulate the rotation speed and the voltage of the motor according to the signal of the first regulating switch 35 or the second regulating switch.
In another embodiment, the working element 112 includes a heating wire, i.e., the power tool 11 is a non-powered power tool, and the non-powered power tool 11 may be an electric soldering iron or the like. The operating parameters of the operating member 112 include the temperature of the heating wire.
As shown in fig. 16-17, the power tool 11 may also be a power tool without a motor, such as an electric soldering iron. The main purpose of the electric soldering iron 11 is to solder elements and wires. For this purpose, the electric soldering iron 11 is mainly provided with an iron core 41 and an iron tip 43. A soldering iron core 41 comprising a heating wire, wherein the soldering iron core 41 is located inside the second housing 18 for receiving the electric power from the battery pack 27 for heating, and a soldering iron tip 43 is provided at one end of the housing 18 for soldering. Unlike the power tool described above, the electric soldering iron 11 has no motor inside the housing 18.
When the control device 12 is connected to the battery pack 27 and the cable 23 is connected to the electric soldering iron 11, the power of the battery pack 27 is output to the soldering iron core 41 to heat the same.
In the present embodiment, when the connected electric power tool is an electric soldering iron, the control device 12 performs a function of transmitting electric power thereto, and does not involve a function of controlling the rotational speed or the like.
In a possible embodiment, a second control unit is further arranged inside the second casing 18 of the electric soldering iron 11 for temperature control. The second casing 18 is also provided with a temperature selection button for the user to select the temperature according to the actual requirement.
In a possible embodiment, the first adjustment switch 35 or the second adjustment switch can be a temperature selection button, and after the first adjustment switch 35 or the second adjustment switch is electrically connected to the second control unit 110, the second control unit 110 can adjust the temperature of the soldering iron core 41 according to the signal.
In the electric tool system provided by the above embodiment, the battery pack can be adapted to an electric tool with a motor and can also be adapted to an electric tool without a motor, so that not only can the adaptability of the control device 12 be improved, but also the production cost of the electric tool 11 can be reduced.
In one embodiment, the first control unit 120 may determine the operating state of the battery pack 27 by detecting at least one of voltage, current, and temperature parameters of the battery pack 27. When the battery pack 27 is abnormally operated, the first control unit 120 cuts off power transmission of the battery pack to the power tool 11 to protect the power tool 11 from being damaged.
In one embodiment, the power tool 11 further includes an overcurrent protection unit for detecting a value of current flowing into the motor or the heating wire (i.e., the working part), and the second control unit 110 controls the motor or the heating wire (i.e., the working part) to stop operating when the value of current flowing into the motor or the heating wire is greater than or equal to a predetermined current value.
In one embodiment, the first user operation unit 121 of the control device comprises an instruction module for instructing the user to perform a desired operation.
In one embodiment, the control device further includes a display module for displaying information related to the battery pack or information related to the control device, such as voltage, remaining capacity, charge reminder, or the like of the battery pack, or model and supply voltage of the control device.
As can be seen from the above, the electric power tool system according to the embodiment of the present invention does not require a power supply for supplying electric power to the working element 112 in the electric power tool 11 by providing the external control device 12 having the battery pack mounting portion 25. I.e., the power source is provided separately from the power tool 11. This reduces the volume and weight of the power tool 11. On the other hand, when the second housing 18 is held by hand to operate the electric power tool 11, the control device 12 can be placed aside without the user bearing its weight; in the electric power tool system 10 according to the embodiment of the present invention, the electric power tool 11 is provided separately from the battery pack mounting portion 25, and the electric power tool 11 is small in size, light in weight, and easy to grip. The control device 12 in the electric tool system 10 is commonly used in various electric tools 11, and can be adapted to both the electric tool 11 with a motor and the electric tool 11 without a motor; the electric tool can be adapted to the electric tool 11 with the speed regulation function, and can also be adapted to the electric tool 11 without the speed regulation function; either with the power tool 11 with the control unit or with the power tool 11 without the control unit. Thus, not only the adaptability of the control device 12 can be improved, but also the production cost of the electric tool 11 can be reduced. Since the brushless motor 16 is used for the electric power tool 11 in the electric power tool system 10 according to the embodiment of the present invention, the efficiency is higher.
In a possible embodiment, as shown in fig. 3, the present application further provides a controller, which includes the aforementioned control device 12 and the electrical connector 30. Wherein the electrical connector comprises a male connector provided on one of the control device and the power tool and a female connector provided on the other of the control device and the power tool, the male connector being adapted to mate with the female connector. And the male connector or the female connector is fixedly connected with the control device through a cable or directly fixedly connected with the control device.
An embodiment of the present application provides an electric tool system, including: a control device and an electric tool; the control device comprises a first shell, a first control unit, a battery pack mounting part and a first interface; the first control unit is arranged in the first shell and used for controlling the working parameters of the motor of the electric tool when the electric tool is connected with the control device; the battery pack mounting part is arranged on the first shell and used for connecting a battery pack; the battery pack is used for providing power for the motor; the electric tool comprises a second shell, a motor arranged in the second shell and a second interface arranged on the second shell; the second interface is electrically connected with the motor; when the first interface is connected with the second interface through the cable, the first control unit is electrically connected with the motor.
When the electric tool is used, the second shell can be held by hand to operate the electric tool, and the control device can be placed aside without bearing the weight of a user.
According to the scheme, the electric tool system provided by the embodiment of the application is provided with the external control device with the first control unit and the battery pack mounting part; a first control unit for controlling the working parameters of the motor is not required to be arranged in the electric tool; and eliminates the need for a power source within the power tool for providing power to the motor. I.e. the first control unit, the power supply and the power tool are provided separately. On the one hand, the volume and the weight of the electric tool are reduced. On the other hand, when the second shell is held by hand to operate the electric tool, the control device can be placed aside, and the user does not bear the weight of the electric tool; in addition, in the electric tool system provided by the embodiment of the application, the electric tool, the control unit and the battery pack mounting part are separately arranged, so that the electric tool is small in structural size, light in weight and easy to hold; meanwhile, the electric tool with small structure size adopts the battery pack with the battery capacity of 2AH for power supply, and the cruising ability is stronger.
In one embodiment, the control device in the power tool system is used for controlling the working components of the power tool, and the power tool is not provided with a control unit. In this embodiment, the control device performs a function of transmitting electric power thereto, and does not involve a function of controlling the rotational speed or the like.
In one embodiment, the control device in the power tool system is used for controlling working components of the power tool, and the power tool is not provided with a control unit; the first control unit comprises an identification module; for identifying the type of power tool connected thereto to select operating parameters that match the power tool. In a further embodiment, 5 conductive wires are provided inside the cable. Correspondingly, the insertion opening is provided with 5 insertion grooves, and the connecting terminal is provided with 5 cylindrical protrusions. Wherein, 3 conducting wires are used for transmitting the electric power of battery package to the motor, and two other conducting wires are used for serving for the discernment function.
In one embodiment, the first control unit is used for controlling the battery and working components of the electric tool, and the first control unit comprises an identification module which is used for identifying the type of the electric tool connected with the identification module so as to select working parameters matched with the electric tool. Specifically, the first control unit has an identification function. When the control device is connected with the electric tool through a cable, the first switch is pressed, and the first control unit is electrified to work; the first control unit firstly identifies the type of the electric tool connected with the first control unit; then the first control unit selects the motor working parameter matched with the electric tool and transmits the electric power corresponding to the working parameter to the electric tool through the cable.
Specifically, the identification resistor may be provided at the power tool end. The types of the electric tools are different, and the resistance values of the set resistors are also different. When the electric tool is electrically connected with the control device through the cable, the first control unit obtains the resistance value of the identification resistor, determines the type of the electric tool according to the resistance value, and selects the working parameters matched with the electric tool to control the electric tool to work.
The first control unit can also identify the type of motor of the power tool connected with the first control unit, so as to select the working parameters matched with the motor.
In one possible embodiment, a circuit board may be disposed inside the power tool for information transmission with the first control unit to implement the identification function of the control device. When the control device is connected with the electric tool through the cable, a user presses the switch; the first control unit and the circuit board are powered on to work; the first control unit sends an identification signal to the circuit board through one of the conducting wires; after receiving the identification signal, the circuit board sends an identity signal capable of indicating the tool type or the motor type of the circuit board to the first control unit through another conducting wire; after receiving the identity information, the first control unit judges the type of the electric tool connected with the first control unit and the type of the motor, and controls the electric tool to work.
In one possible embodiment, the first control unit may identify the type of power tool by means of wireless communication, such as bluetooth technology or the like. Specifically, the first control unit is provided with a first wireless module; correspondingly, the electric tool is provided with a second wireless module. When the control device is connected with the battery pack and the control device is connected with the electric tool through the cable, the first switch is pressed; the control device and the electric tool jointly receive the electric power from the battery pack, so that the first wireless module and the second wireless module are respectively electrified to work; the second wireless module sends out a wireless signal capable of representing the identity information of the electric tool, receives the signal and feeds back the signal to the first control unit; the first control unit judges the type of the electric tool connected with the first control unit according to the received wireless signal, and finally selects the motor working parameters matched with the electric tool.
It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (16)

  1. A power tool system comprising at least two kinds of power tools, a control device for cooperation with the power tools, and a battery pack serving as a power source,
    the control device includes: the first shell is used for connecting a battery pack mounting part of the battery pack, the first control unit is arranged in the first shell and can control the battery pack to discharge, the first user operation unit is used for user operation to control the electric tool, and the first interface is electrically connected with the first user operation unit;
    the electric tool includes: the working component, a second control unit arranged in the second shell and used for controlling the working component, and a second interface electrically connected with the second control unit;
    the battery pack mounting portion includes a pair of guide rails along which the battery pack is slidable to engage or disengage the control device;
    the first interface is connected with the second interface through a cable, so that the electric tool is electrically connected with the control device.
  2. The power tool system of claim 1, wherein the first user-operated unit includes a first switch for allowing or prohibiting power transmission from the battery pack to the power tool.
  3. The power tool system of claim 2, wherein the second control unit controls the operating parameters of the working member according to internally stored preset control instructions.
  4. The power tool system of claim 2, further comprising a second user operation unit, wherein the second user operation unit comprises a second switch electrically connected to the second control unit, the second control unit enables the working component to be turned on or off according to an on-off state of the second switch, and/or the second user operation unit comprises a second adjustment switch electrically connected to the second control unit, and the second control unit adjusts the working parameter of the working component according to an operation of the second adjustment switch by a user.
  5. The power tool system of claim 1, wherein the working component comprises a motor or a heating wire or a resistance wire.
  6. A power tool system comprising a power tool, a control device for cooperating with the power tool, wherein the control device cooperates with a battery pack to provide power to the power tool,
    the control device includes: the first control unit is arranged in the first shell, the first control unit is used for being connected with a battery pack mounting part of the battery pack, a first user operation unit is used for being operated by a user to control the electric tool, and the first interface is electrically connected with the first user operation unit;
    the electric tool includes: the working component, a second control unit arranged in the second shell and used for controlling the working component, and a second interface electrically connected with the second control unit;
    the battery pack mounting portion includes a pair of guide rails along which the battery pack is slidable to engage or disengage the control device;
    the first interface is connected with the second interface through a cable, so that the electric tool is electrically connected with the control device;
    the second control unit is electrically connected with the first user operation unit through the cable, obtains the operation of a user on the first user operation unit, and controls the working component according to the operation of the user on the first user operation unit.
  7. The power tool system of claim 6, wherein the first user operating unit includes a first adjustment switch, and the second control unit detects a user operation of the first adjustment switch via the cable and generates a first adjustment signal for adjusting an operating parameter of the working member.
  8. The power tool system of claim 7, wherein the cable has 3 wires disposed therein, wherein 2 wires are conductive wires for transmitting power of the battery pack to the power tool, and 1 wire is a signal wire for electrically connecting the second control unit and the first adjustment switch.
  9. The power tool system of claim 7, wherein the second control unit adjusts an operating parameter of the working component according to the first adjustment signal or controls the working component according to a preset control instruction stored internally.
  10. [ correction 05.01.2021 according to rules 91 ] the electric power tool system according to claim 7, further comprising a second user operation unit for user operation to control an operation parameter of the working member.
  11. [ correction 05.01.2021 according to rules 91 ] the electric power tool system according to claim 10, wherein the second user operating unit includes a second switch electrically connected to the second control unit, and the second control unit controls the working member to be turned on or off according to an on/off state of the second switch.
  12. [ amendment 05.01.2021 according to rules 91 ] the power tool system according to claim 10, wherein the second user operating unit comprises a second adjustment switch electrically connected to the second control unit, and the second control unit generates a second adjustment signal according to a user operation of the second adjustment switch, and selects one of the first adjustment signal and the second adjustment signal according to a preset priority to adjust the operating parameter of the working component.
  13. [ correction 05.01.2021 based on rules 91]
    A control device for cooperation with at least two types of power tools, the power tools including a second control unit, the control device comprising:
    a first housing;
    a battery pack mounting portion including a pair of guide rails for detachably connecting a battery pack, the battery pack being slidable along the pair of guide rails to be engaged with or disengaged from the control device;
    the first control unit is arranged in the first shell and used for monitoring at least one of voltage, current and temperature parameters of the battery pack, judging the working state of the battery pack and cutting off power transmission from the battery pack to the electric tool when the battery pack is abnormal;
    the first interface is electrically connected with the electric tool through a cable, and the control device transmits electric energy to the electric tool through the first interface.
  14. [ claim 91 to correct 05.01.2021] the control device according to claim 13, wherein the electric power tool further comprises an overcurrent protection unit for detecting a value of current flowing to the working element and stopping the output of the working element when the current value is larger than a predetermined current value.
  15. [ correction 05.01.2021 based on rules 91]
    A control device for engagement with a power tool including a working element and a second interface, the control device comprising:
    a first housing;
    a battery pack mounting portion including a pair of guide rails for detachably connecting a battery pack, the battery pack being slidable along the pair of guide rails to be engaged with or disengaged from the control device;
    the first control unit is arranged in the first shell and used for monitoring at least one of voltage, current and temperature parameters of the battery pack, judging the working state of the battery pack and cutting off power transmission from the battery pack to the electric tool when the battery pack is abnormal;
    the first user operation unit is used for user operation and control;
    the first interface is electrically connected with the first user operation unit through a cable, so that the electric tool is electrically connected with the control device, and the working part is controlled according to the operation of the user on the first user operation unit.
  16. [ claim 91 for correction 05.01.2021] the control device according to claim 16, wherein the electric power tool includes a second control unit electrically connected to the first user operation unit via the cable, and configured to acquire the operation of the first user operation unit by the user.
CN202080009846.5A 2019-12-13 2020-12-14 Control device and electric tool system Pending CN113853277A (en)

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CN2019222421985 2019-12-13
CN201922242198 2019-12-13
CN2020201453298 2020-01-22
CN202020145329 2020-01-22
PCT/CN2020/136188 WO2021115484A1 (en) 2019-12-13 2020-12-14 Control device and electric power tool system

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