阅读说明：本技术 电动工具 (Electric tool ) 是由 徐振 倪沐阳 于 2020-07-17 设计创作，主要内容包括：本发明涉及电动工具技术领域,公开一种电动工具,包括：把手,供用户握持；动力输出件,设置于把手前方；电机,为动力输出件提供驱动力；控制模块,控制电机的运行；检测组件,检测电动工具的运行参数；显示界面,显示界面与控制模块电连接,显示界面包括成排分布的多个显示单元和调速机构,多个显示单元可依次被点亮,以指示电动工具的当前挡位,控制模块控制多个显示单元通过闪烁或熄灭指示电动工具的故障状态,调速机构被操纵以调整电动工具的挡位；电池包,电池包分别与显示界面、电机及控制模块电连接。本发明公开的电动工具可以及时提醒用户当前电动工具故障信息和档位状态,方便用户使用。(The invention relates to the technical field of electric tools, and discloses an electric tool, which comprises: a handle for holding by a user; the power output piece is arranged in front of the handle; the motor provides driving force for the power output part; the control module controls the operation of the motor; the detection assembly detects the operating parameters of the electric tool; the display interface is electrically connected with the control module and comprises a plurality of display units and a speed regulating mechanism which are distributed in rows, the display units can be sequentially lightened to indicate the current gear of the electric tool, the control module controls the display units to indicate the fault state of the electric tool through flickering or extinguishing, and the speed regulating mechanism is operated to adjust the gear of the electric tool; and the battery pack is electrically connected with the display interface, the motor and the control module respectively. The electric tool disclosed by the invention can remind a user of the current fault information and gear state of the electric tool in time, and is convenient for the user to use.)

1. A power tool, comprising:

a handle for holding by a user;

a power output member provided in front of the handle;

a motor that provides a driving force for the power output member;

the control module controls the operation of the motor;

a detection component communicably coupled with the control module and detecting an operating parameter of the power tool;

the display interface is electrically connected with the control module and comprises a plurality of display units and a speed regulating mechanism which are distributed in rows, the display units can be sequentially lightened to indicate the current gear of the electric tool, the control module controls the display units to indicate the fault state of the electric tool through flashing or extinguishing, and the speed regulating mechanism is operated to adjust the gear of the electric tool;

and the battery pack is electrically connected with the display interface, the motor and the control module respectively.

2. The power tool of claim 1, wherein: the fault states of the electric tool at least comprise a first type of fault state and a second type of fault state, and the control module controls the display interface to flash or extinguish according to the type of the fault state of the electric tool.

3. The power tool of claim 2, wherein: the first type of fault state comprises that the voltage of the battery pack is under-voltage and the voltage of the battery pack is lower than a preset voltage, and when the electric tool is in the first type of fault state, the control module controls the display units to flicker for a first time length at a first frequency.

4. The electric power tool according to claim 2 or 3, characterized in that: the power tool further includes a field effect transistor and a temperature sensor configured to detect temperatures of the field effect transistor and the battery pack;

the second type of fault state comprises one or more of the temperature of the battery pack being higher than a first preset temperature, the current of the field effect transistor being higher than a preset current value, the temperature of the field effect transistor being higher than a second preset temperature, the motor stalling and the motor reversing, and when the electric tool is in the second type of fault state, the control module controls the display units to flash at a second frequency for a second time.

5. The power tool of claim 4, wherein: the fault states further comprise a third type of fault state, the third type of fault state at least comprises a battery pack communication fault, and when the electric tool is in the third type of fault state, the control module controls the display units to be simultaneously turned off.

6. The power tool of claim 1, wherein: the speed regulating mechanism is a button, when the display interface is in a screen-off state, the speed regulating mechanism is pressed down, the display interface is awakened, the speed regulating mechanism is loosened, and the gear of the electric tool is unchanged.

7. The power tool of claim 6, wherein: when the display interface is in the awakening state, the speed regulating mechanism is pressed down and loosened, the gear of the electric tool is changed, and meanwhile, the display unit indicates the current gear of the electric tool.

8. The power tool of claim 2, wherein: the electric tool further comprises a switch, when the switch is closed, the battery pack is communicated with the power output part to supply power to the power output part, the power output part is located at the gear stored last time, and when the switch is disconnected, the battery pack is disconnected with the power output part.

9. The power tool of claim 8, wherein: when the electric tool is in failure, the switch is configured to be automatically disconnected, and the power output part is powered off and stops rotating.

10. The power tool according to any one of claims 6 to 9, wherein: the display interface is arranged at the rear end of the handle.

Technical Field

The invention relates to the technical field of electric tools, in particular to an electric tool.

Background

When the existing electric tool works, a user needs to pay attention to the working gear of the electric tool and pay attention to the abnormal working state of the electric tool, once the electric tool breaks down, the user cannot know the abnormal working state in time, can only judge the abnormal working state by experience, and cannot process the abnormal working state in time, so that the service life of the electric tool is greatly shortened, and the personal safety of the user is possibly damaged.

Disclosure of Invention

Based on the above, the present invention is directed to provide an electric tool, which can provide more holding positions for a user, so as to facilitate the user to use the electric tool, and the display interface of the electric tool can also prompt the user once the electric tool fails.

In order to achieve the above main object of the invention, there is provided an electric power tool including: a handle for holding by a user; the power output piece is arranged in front of the handle; the motor provides driving force for the power output part; the control module controls the operation of the motor; the display interface is electrically connected with the control module and comprises a plurality of display units and a speed regulating mechanism which are distributed in rows, the display units can be sequentially lightened to indicate the current gear of the electric tool, the control module controls the display units to indicate the fault state of the electric tool through flickering or extinguishing, and the speed regulating mechanism is operated to adjust the gear of the electric tool; and the battery pack is electrically connected with the display interface, the motor and the control module respectively.

Optionally, the fault state of the electric tool at least includes a first type of fault state and a second type of fault state, and the control module controls the display interface to flash or extinguish according to the type of the fault state of the electric tool.

Optionally, the first type of fault state includes that the voltage of the battery pack is under-voltage and the voltage of the battery pack is lower than a preset voltage, and when the electric tool is in the first type of fault state, the control module controls the plurality of display units to flash at a first frequency for a first time period.

Optionally, the power tool further comprises a field effect transistor and a temperature sensor configured to detect the temperature of the field effect transistor and the battery pack; the second type of fault state comprises one or more of the temperature of the battery pack being higher than a first preset temperature, the current of the field effect transistor being higher than a preset current value, the temperature of the field effect transistor being higher than a second preset temperature, the motor stalling and the motor reversing, and when the electric tool is in the second type of fault state, the control module controls the plurality of display units to flash at a second frequency for a second duration.

Optionally, the fault states further include a third type of fault state, the third type of fault state at least includes a battery pack communication fault, and when the electric tool is in the third type of fault state, the control module controls the plurality of display units to be simultaneously turned off.

Optionally, the speed regulating mechanism is a button, when the display interface is in a screen-off state, the speed regulating mechanism is pressed down, the display interface is awakened, the speed regulating mechanism is loosened, and the gear of the electric tool is unchanged.

Optionally, when the display interface is in the wake-up state, the speed regulating mechanism is pressed and released, the gear of the electric tool changes, and meanwhile, the display unit indicates the current gear of the electric tool.

Optionally, the electric tool further comprises a switch, when the switch is turned off, the battery pack is communicated with the power output part to supply power to the power output part, the power output part is located in a last stored gear, and when the switch is turned off, the battery pack is disconnected from the power output part.

Optionally, in the event of a fault in the power tool, the switch is configured to automatically open, de-energise the power take off and stop rotating.

Optionally, the display interface is arranged at the rear end of the handle.

The invention has the beneficial effects that: the display interface of the electric tool disclosed by the invention comprises a plurality of display units and a speed regulating mechanism which are distributed in rows, the display units can be sequentially lightened to indicate the current gear of the electric tool, the control module controls the display units to indicate the fault state of the electric tool through flashing or extinguishing so as to remind a user of timely adjusting, the electric tool in the fault state is prevented from further damaging the electric tool or injuring the user, and the service life of the electric tool is prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic view of a power tool provided in accordance with an embodiment of the present invention in a first orientation;

FIG. 2 is a schematic view of a power tool in a second orientation with a portion of the housing removed in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a power tool provided in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of a power tool provided in accordance with an embodiment of the present invention in a third orientation;

fig. 5 is a schematic diagram of a display interface and a speed regulation structure provided in an embodiment of the present invention.

In the figure:

1. a handle; 2. a power take-off; 3. displaying an interface; 31. a display unit; 32. a speed regulating mechanism; 321. a first speed regulating mechanism; 322. a second speed regulating mechanism; 4. a battery pack; 5. a switch; 6. a control module; 7. a charge indicator; 8. an electric motor.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present embodiment provides an electric tool, which is an angle grinder having an operating voltage of 18V, with reference to fig. 1 to 5. Specifically, the power tool includes a handle 1 and a power output member 2 located in front of the handle 1, the handle 1 being for being held by a user. The electric tool further comprises a display interface 3 and a battery pack 4, wherein the display interface 3 comprises four display units 31 and a speed regulating mechanism 32 which are distributed in a row, the four display units 31 can be sequentially lightened to indicate the current gear of the electric tool, the four display units 31 can also be simultaneously flickered or extinguished to indicate the fault state of the electric tool, the speed regulating mechanism 32 is configured to be operated to wake up the display interface 3 when the display interface 3 is in the screen-off state and to adjust the gear of the electric tool when the display interface 3 is in the wake-up state, so that the rotating speed of the power output part 2 is changed, and the battery pack 4 is respectively and electrically connected with the display interface 3 and the speed regulating mechanism 32.

Referring to fig. 2 to 4, in the electric tool provided in this embodiment, the speed adjusting mechanism 32 is disposed at the rear end of the handle 1, so that more holding positions can be provided for a user, and the electric tool is convenient for the user to use, once the electric tool fails, the display unit 31 of the electric tool can also prompt the user, so as to improve the use satisfaction of the user, and when the speed adjusting mechanism 32 of the present invention is operated, the display interface 3 can be woken up when the display interface 3 is in the off-screen state, and the gear of the electric tool can also be adjusted when the display interface 3 is in the woken-up state, because the display interface 3 and the speed adjusting mechanism 32 of the electric tool are always in the electrical connection state with the battery pack 4, that is, no matter whether the power output component 2 is in the working state, the gear of the electric tool. Display interface 3 sets up in handle 1 rear end, and the user can be more direct acquires the information that display interface 3 suggests to convenience of customers carries out the speed governing through the speed adjusting mechanism 32 on the display interface 3 to electric tool's fender position, and shows current fender position information and fault information through display element 31 of display interface 3, and information collects, promotes and acquires information efficiency, facilitates the use. The display interface 3 with the speed regulation structure 3 is arranged at the rear end of the handle 1, so that the user can carry out speed regulation at the tail of the electric tool, and the use safety is improved.

Specifically, referring to fig. 3, the power tool further includes a motor 8 for providing a driving force, the power output member 2 is driven by the motor 8, the gear positions of the power tool are different, the rotation speed of the motor 8 is also different, and the rotation speed of the motor 8 is gradually increased as the gear positions are increased. When the power tool is embodied as an angle grinder, the angle grinder further comprises a tool holder for mounting a support tool attachment, which is connected to the power take-off 2, by means of which the workpiece is output. Referring to fig. 5, since the electric power tool of the present embodiment has four shift positions, the number of the display units 31 of the present embodiment is four, the four display units 31 are arranged in parallel in a row and electrically connected to the speed control mechanism 32, respectively, and the number of the display units 31 to be lit differs depending on the shift position of the electric power tool. Specifically, when the electric power tool is in the first gear, the first display unit 31 is lit; when the electric tool is in the second gear, the first two display units 31 are lighted; when the electric tool is in the third gear, the first three display units 31 are lit; when the power tool is in the fourth gear, all of the four display units 31 are lit. Of course, in other embodiments of the present invention, the gear of the power tool is different, and the power tool may be lighted by the display unit 31 at different positions.

Referring to fig. 3, the power tool further includes a control module 6 and a detection assembly for detecting an operation parameter of the power tool, the control module 6 is capable of controlling the operation of the motor 8, the detection assembly at least includes a current sensor or a voltage sensor for detecting a current value or a voltage value of the motor 8, and the detection assembly is electrically connected to the battery pack 4 and the control module 6. The detection component detects the running state parameters of the electric tool and transmits the running state parameters to the control module 6, the control module 6 analyzes the detected state parameter information to obtain the current running state of the electric tool, specifically the fault state of the electric tool, the control module 6 analyzes the prompting mode of the display interface 3 and controls the display unit 31 to flicker or extinguish correspondingly, and therefore the user is reminded of the fault state information of the electric tool in time.

Of course, in other embodiments of the present invention, the power tool may also be a multi-function tool, a gun drill, or other power tools. The gear position and the display unit 31 of the present invention may be lighted in other forms, for example, the gear position of the electric tool is different, the position of the lighted display unit 31 is different, and the lighting mode of the display unit 31 corresponds to the gear position information of the electric tool one-to-one, that is, when the electric tool is in the first gear position, only the first display unit 31 is lighted; when the power tool is in the second gear, only the second display unit 31 is lit; when the electric power tool is in the third gear, only the third display unit 31 is lit; when the electric tool is in the fourth gear, only the fourth display unit 31 is turned on, in other embodiments, the gear of the electric tool and the display unit 31 may also be turned on in other one-to-one correspondence manners, and the gear of the electric tool and the lighting manner of the display unit 31 are specifically set according to actual needs. The working voltage of the electric tool can be 18V, and can also be 24V or other voltage values, which are set according to actual conditions.

Of course, in other embodiments of the present invention, the number of the gears of the electric power tool is not limited to four in this embodiment, and the number of the corresponding display units 31 is also not limited to four in this embodiment, and may be other numbers, and the number of the display units 31 is set corresponding to the gear of the electric power tool.

The display interface 3 is arranged at the rear end of the handle 1, and the display interface 3 can display the gear of the electric tool, the rotating speed of the motor 8 and fault information. The battery pack 4 is located in the installation cavity and electrically connected to the motor 8, the speed adjusting mechanism 32, the display unit 31 and the display interface 3, and the battery pack 4 of this embodiment is a rechargeable battery pack. When the battery pack 4 is charged, in order to display the charging state of the battery pack 4, the electric tool of the embodiment is further provided with the charging indication mark 7, as shown in fig. 2, when the battery pack 4 is charged, the current charging state of the battery pack 4 can be checked through the charging indication mark 7, so that the user can conveniently charge the battery pack 4.

The speed adjusting mechanism 32 of this embodiment is a button, refer to fig. 1, fig. 2, fig. 4, and fig. 5, and includes a first speed adjusting mechanism 321 and a second speed adjusting mechanism 322, and the control module 6 includes a Micro Control Unit (MCU). As shown in fig. 1 and 2, the first speed adjusting mechanism 321 and the second speed adjusting mechanism 322 are respectively disposed on two sides of the display interface 3, the first speed adjusting mechanism 321 is used for increasing the gear of the electric tool to increase the rotation speed of the power output component 2, and the second speed adjusting mechanism 322 is used for decreasing the gear of the electric tool to decrease the rotation speed of the power output component 2. Specifically, the first speed adjusting mechanism 321 and the second speed adjusting mechanism 322 can trigger different AD values (that is, values obtained by converting analog signals into digital signals), and then the micro control unit determines the increase or decrease of the gear of the electric tool according to the detected different AD values, and at the same time, the number of the lighted display units 31 increases or decreases, so that the gears of the electric tool correspond to the number of the lighted display units 31 one to one.

Further, the electric power tool of the present embodiment further includes a field effect transistor (not shown in the drawings) and a temperature sensor (not shown in the drawings) located in the mounting cavity, the temperature sensor being configured to detect a temperature of the field effect transistor, the temperature sensor and the field effect transistor being electrically connected to the battery pack 4, respectively.

Further, the power tool of the present embodiment further includes a switch 5, and referring to fig. 1, 2 and 4, the switch 5 is used for turning on or off the power tool. Specifically, when the switch 5 is turned on, the electric tool is in an on state, and at this time, the electric tool is in a standby state or a working state, and the battery pack 4 supplies power to the motor 8; when the switch 5 is turned off, the electric tool is in an off state, and at this time, the electric tool does not work, and the battery pack 4 does not supply power to the motor 8.

It should be noted that the display interface 3, the MCU and the speed adjusting mechanism 32 of the electric tool of the present embodiment are always connected to the battery pack 4, that is, the battery pack 4 always supplies power to the display interface 3, the MCU and the speed adjusting mechanism 32, and no matter the switch 5 is turned on or off, the display interface 3 is in the wake-up state, and the speed adjusting mechanism 32 is pressed and released, so that the gear of the electric tool changes.

The control module 6 of the present embodiment may be implemented as a processing and computing device such as a circuit board, an integrated circuit, a single chip, or the like. As shown in fig. 3, the control module 6 is located in the installation cavity, the control module 6 is connected to the battery pack 4, and the speed adjusting mechanism 32, the display unit 31, the display interface 3, the MCU, the temperature sensor and the field effect transistor are electrically connected to the control module 6, respectively. The running condition of the electric tool is analyzed through the control module 6, if the electric tool is in a fault state, the flicker mode or the extinguishing mode of the display interface 3 corresponding to the fault state is analyzed, the control module 6 controls the display unit 31 of the display interface 3 to flicker or extinguish, so that the current fault state of the electric tool is reminded to a user, the user can conveniently and timely handle the fault state, the electric tool is prevented from being further damaged, and the damage to the user or the environment is prevented.

The control module 6 obtains the current gear of the electric tool, controls the number of the lighted display units 31 of the display interface 3, prompts the user of the current gear of the electric tool, and facilitates the user to obtain the working information of the electric tool and adjust the working information.

The fault states of the electric tool at least comprise a first type fault state and a second type fault state, and the control module 6 controls the display unit 31 of the display interface 3 to flash or extinguish according to the type of the fault state of the electric tool. The first type of fault state includes that the voltage of the battery pack 4 is under voltage and the voltage of the battery pack 4 is lower than a preset voltage, and when the electric tool is in the first type of fault state, the control module 6 controls the display unit 31 to flicker for a first time length at a first frequency.

The second type of fault state includes one or more of a temperature of the battery pack 4 being higher than a first preset temperature, a current of the field effect transistor being higher than a preset current value, a temperature of the field effect transistor being higher than a second preset temperature, a stalling of the motor 8, and a reversal of the motor 8, and when the electric tool is in the second type of fault state, the control module 6 controls the plurality of display units 31 to flash at a second frequency for a second duration at the same time. The fault states further include a third type of fault state, the third type of fault state includes at least a communication fault of the battery pack 4, and when the electric power tool is in the third type of fault state, the control module 6 controls the plurality of display units 31 to be simultaneously turned off.

In the conventional electric tool, the gear of the electric tool is generally zero when the electric tool is started, that is, the power output part 2 of the electric tool does not rotate, and if the power output part 2 is required to rotate, the gear of the electric tool must be changed by adjusting the speed regulating mechanism 32 to increase the rotating speed of the power output part 2, so that the operation complexity is increased. In order to facilitate the use of the user and improve the use satisfaction of the user, when the electric tool of the embodiment is started, the electric tool is ensured to be in the last stored gear, namely, after the electric tool is started, the gear of the electric tool is the same as the last stored gear. In actual use, when a user needs to take a rest halfway, the electric power tool needs to be turned off because the electric power tool is kept in the working state all the time, which wastes electric energy. When the electric tool is started again, the electric tool is located in the gear stored last time, a user does not need to readjust the gear, the electric tool is convenient to use, and the simplicity of operation is improved.

Further, when the last stored gear of the electric tool is a zero gear, the power output part 2 is communicated with the battery pack 4, the power output part 2 of the electric tool does not rotate, the display interface 3 is in a screen-off state, the speed regulating mechanism 32 is pressed down for the first time, the speed regulating mechanism 32 is awakened, the display interface 3 is lightened, the speed regulating mechanism 32 is released, and the gear of the electric tool cannot be changed. If the stored gear of the electric tool is not zero, after the motor 8 is communicated with the battery pack 4, the power output part 2 of the electric tool rotates, the electric tool is in a working state, but the display interface 3 is in a screen-off state at the moment, the speed regulating mechanism 32 is pressed for the first time, the speed regulating mechanism 32 is awakened, the display interface 3 is lightened at the same time, the speed regulating mechanism 32 is loosened at the moment, and the gear of the electric tool cannot be changed. No matter whether the last stored gear of the electric tool is zero gear or not, after the motor 8 is communicated with the battery pack 4, the speed regulating mechanism 32 is pressed down for the first time, the speed regulating mechanism 32 is awakened, the display interface 3 is lightened at the same time, the speed regulating mechanism 32 is loosened, the gear of the electric tool cannot be changed, namely, the rotating speed of the power output part 2 is matched with the last stored gear of the electric tool, so that the gear does not need to be adjusted by a user, and the use efficiency is improved

Certainly, in the working process of the electric tool, once the display interface 3 goes out of the screen state from the wake-up state, if the display interface 3 is to be put into the wake-up state from the screen-off state again, no matter whether the gear of the electric tool is a zero gear or not, the speed regulating mechanism 32 is only required to be pressed down, the speed regulating mechanism 32 is woken up, the display interface 3 is lightened at the same time, and the speed regulating mechanism 32 is released at the moment, so that the gear of the electric tool is also not changed. After the display interface 3 is in the awakening state, the gear of the electric tool can be adjusted by pressing and releasing the speed regulating mechanism 32, so that the rotating speed of the power output part 2 can be changed.

It should be additionally noted that, in this embodiment, even if the motor 8 and the battery pack 4 are not connected, and the display interface 3 is in the screen-off state, the display interface 3 may be waken up by pressing the speed adjusting mechanism 32, and after the display interface 3 is in the wakening state, the gear of the electric tool may be adjusted by pressing and releasing the speed adjusting mechanism 32, that is, the gear of the electric tool changes by using the released speed adjusting mechanism 32 as a time node.

The electric tool that this embodiment provided is when display interface 3 is in the state of awakening up, unclamping time point through control speed adjusting mechanism 32, thereby leave certain time and then in time adjust the fender position of electric tool for the user, if press two speed adjusting mechanism 32 simultaneously, can also be through the difference of the unclamping time of two speed adjusting mechanism 32 of control, prevent the disorder of electric tool's system, display interface 3 of this embodiment is from going out when screen state to the state of awakening up changes, press and unclamp speed adjusting mechanism 32, electric tool's fender position is unchangeable, in addition, this embodiment can also show electric tool's fault state through the scintillation or the extinction of display element 31, make the user in time realize that electric tool breaks down, thereby make the adjustment to electric tool, prevent electric tool further damage, electric tool's life has been prolonged.

Specifically, the display unit 31 of the present embodiment is an LED indicator, and the colors of the four LED indicators are the same. Of course, in other embodiments of the present invention, the display unit 31 is not limited to the LED indicator of the embodiment, and may also be other display units 31 for indicating, and the color of the light emitted when the display unit 31 is turned on may be the same or different, for example, the light emitting red color when the power tool fails, the light emitting green color when the gear of the power tool is normally displayed, and the like, which are specifically set according to actual needs.

When the electric tool breaks down, the control module 6 controls the four display units 31 to flash or extinguish at the same time so as to prompt a fault state, wherein the fault state specifically comprises the following conditions:

the voltage of the battery pack 4 is lower than the preset voltage, and all the display units 31 flicker for a first time at a first frequency;

the temperature of the battery pack 4 is higher than the first preset temperature, and the plurality of display units 31 all flash at the second frequency for the second time;

when the temperature of the field effect transistor is higher than the second preset temperature, the current of the field effect transistor is higher than the preset current value, the motor 8 is locked-rotor or the motor 8 rotates reversely, all the plurality of display units 31 flash at the third frequency for the third time;

the battery pack 4 has a communication failure, and all of the plurality of display units 31 are turned off.

Specifically, the first frequency of the embodiment is 1Hz, the first duration is 20s, the second frequency and the third frequency are both 5Hz, and the second duration and the third duration are both 20 s. Of course, in other embodiments of the present invention, the first frequency, the second frequency, and the third frequency may also be other frequency values, and the first duration, the second duration, and the third duration may also be other durations, which are specifically set according to actual needs.

When the voltage of the battery pack 4 is lower than the preset voltage, the temperature of the battery pack 4 is higher than the first preset temperature, or the temperature of the field effect transistor is higher than the second preset temperature, the switch 5 of the electric tool is configured to be automatically turned off, the motor 8 stops rotating, the electric tool can be protected, the electric tool can be prevented from being damaged, and the four display units 31 can still flash at the frequencies under the different conditions for the corresponding time lengths. Closing the switch 5, and if the fault is solved, removing the protection state, and simultaneously preventing the four display units 31 from continuously flashing; if the fault still exists, the four display units 31 continue to flash at the frequencies in the different situations for the duration corresponding to the corresponding situations.

When the motor 8 is locked, the current of the field effect transistor is higher than the preset current value or the motor 8 rotates reversely, the switch 5 of the electric tool is configured to be automatically turned off, the electric tool stops working, the electric tool can be protected, the electric tool is prevented from being damaged, and the four display units 31 can still flash at the third frequency for the third time. The switch 5 is turned on and the protection state is released while the four display units 31 do not blink any more.

The communication failure of the battery pack 4 includes the following situations:

if the installed battery pack 4 is incompatible with the electric tool, the battery pack 4 cannot send a signal to the MCU, so that the battery pack 4 cannot be identified by the MCU, and the four display units 31 are all turned off;

if the battery pack 4 is not firmly installed, the battery pack 4 is not firmly contacted with other parts, and the battery pack 4 cannot send signals to the MCU, so that the battery pack 4 cannot be identified by the MCU, and at this time, all of the four display units 31 are turned off.

The electric power tool provided by the present embodiment further includes: the time length for releasing the speed regulating mechanism 32 last time and the time for pressing and releasing the speed regulating mechanism 32 this time is a first interval time length, a first preset time length is set, and if the speed regulating mechanism 32 is not pressed and released again within the first preset time length for pressing and releasing the speed regulating mechanism 32, the gear is calculated according to the instruction execution of the speed regulating mechanism 32; if the first interval duration is less than the first preset duration, the gears are accumulated according to the instruction of the speed regulating mechanism 32 until the activated time interval of the speed regulating mechanism 32 is greater than the first preset duration, and the finally calculated gears are stored. Specifically, the first preset duration of the embodiment is 0.3s, that is, when the duration of releasing the speed adjusting mechanism 32 last time and pressing and releasing the speed adjusting mechanism 32 this time is greater than 0.3s, the gear information is changed, and when the duration of releasing the speed adjusting mechanism 32 last time and pressing and releasing the speed adjusting mechanism 32 again this time is not greater than 0.3s, the gear information of the electric tool is accumulated until the duration of the first interval between two adjacent intervals is greater than 0.3s, and the final gear information of the electric tool is modified.

Further, the present embodiment provides an electric power tool further including: the duration after the speed regulating mechanism 32 is pressed and released is the duration of a second interval, and if the duration of the second interval is greater than a second preset duration, the display interface 3 enters a screen-off state; if the duration of the second interval is not greater than the second preset duration, the display interface 3 keeps the current awakening state. Specifically, the second preset time period of the present embodiment is 10 s. After the display interface 3 enters the screen-off state, the electric tool is in a standby state at the moment, the motor 8 of the electric tool can still normally rotate, the speed regulating mechanism 32 is pressed down at the moment, the screen is awakened, and after the speed regulating mechanism 32 is released, the gear of the electric tool is unchanged, and the rotating speed of the motor 8 is unchanged.

Specifically, the specific process of the electric power tool of the present embodiment is as follows:

the switch 5 is turned on, the electric tool is turned on at the same time, the gear of the electric tool is the gear stored at the previous time, and the display interface 3 is in a screen-off state;

the speed regulating mechanism 32 is pressed down, the display interface 3 is awakened, the speed regulating mechanism 32 is loosened, and the gear of the electric tool is unchanged;

adjusting the speed regulating mechanism 32 to a required gear according to actual requirements;

if the speed regulating mechanism 32 is not triggered again within 0.3s, the gear information of the current time is stored;

after 10s, the display interface 3 enters a screen-off state from an awakening state, and the gear of the electric tool is unchanged, namely the rotating speed of the motor 8 is unchanged;

after the electric tool is used for a period of time, when the electric tool needs to be turned off, the switch 5 is turned off, and the display interface 3 is still in a screen-off state at the moment;

the speed regulating mechanism 32 is pressed, the display interface 3 is awakened, the display unit 31 displays the current gear of the electric tool, and the speed regulating mechanism 32 is released, so that the gear of the electric tool is unchanged;

the speed regulating mechanism 32 is pressed and loosened, the gear of the electric tool is changed, and the number of the lighted display units 31 is changed;

the speed regulating mechanism 32 is released, the speed regulating mechanism 32 is pressed again within 0.3s and released, the gear of the electric tool changes, and the number of the display units 31 which are lightened changes accordingly;

if the speed regulating mechanism 32 is not triggered again within 0.3s, the gear information of the last time is stored;

after 10s, the display interface 3 enters a screen-off state from the awakening state, the gear of the electric tool is unchanged, and the motor 8 does not rotate.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.