Power tool

Abstract

The application discloses an electric tool. The electric tool comprises a trigger switch installed on a holding part, the trigger switch being used for controlling the start and stop of a motor; a mode switching switch installed on the outer surface of a shell and used for switching the working mode of the electric tool, the working mode comprising a first working mode and a second working mode; when the mode switching switch is in a first state, the electric tool is in the first working mode; when the mode switching switch is in a second state, the electric tool is in the second working mode; in the first working mode, the control parameters of the motor comprise a first start parameter and a first brake parameter for controlling the start and stop of the motor; in the second working mode, the control parameters of the motor comprise a second start parameter and a second brake parameter for controlling the start and stop of the motor; the first start parameter is different from the second start parameter, and the first brake parameter is different from the second brake parameter. The application can facilitate the user to adjust the rotating speed of the motor according to the user's own preference, thereby improving the user experience.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to a power tool. Background Technology

[0002] Power tools, such as angle grinders, cutting machines, and electric drills, are widely used in industrial operations and decoration industries. However, when users, especially non-professionals or those unfamiliar with the use of power tools, start or stop the tools without adequate preparation or by accident. This can easily lead to problems such as slipping out of the hand, unstable grip, and misalignment of the workpiece due to the large force exerted when starting or stopping the tools. Furthermore, they are not user-friendly for users with weak hand strength. Utility Model Content

[0003] The main objective of this invention is to propose an electric tool to solve the aforementioned technical problems.

[0004] In a first aspect, embodiments of this application provide an electric tool, the electric tool comprising: a motor; a housing housing the motor, the housing including a grip portion; a trigger switch mounted on the grip portion, the trigger switch being used to control the start and stop of the motor; a mode switching module, the mode switching module including a mode switching switch mounted on the outer surface of the housing, the mode switching switch being used to switch the working mode of the electric tool, the working mode including a first working mode and a second working mode; when the mode switching switch is in a first state, the electric tool is in the first working mode; when the mode switching switch is in a second state, the electric tool is in the second working mode; in the first working mode, the control parameters of the motor include a first starting parameter for controlling the start of the motor and a first braking parameter for controlling the stop of the motor; in the second working mode, the control parameters of the motor include a second starting parameter for controlling the start of the motor and a second braking parameter for controlling the stop of the motor, the first starting parameter and the second starting parameter being different, and the first braking parameter and the second braking parameter being different.

[0005] In some embodiments of this application, the first starting parameter includes a first starting rate, which is the rate of change of the motor speed during the period from when the trigger switch is closed to when the set speed is reached in the first operating mode; the second starting parameter includes a second starting rate, which is the rate of change of the motor speed during the period from when the trigger switch is closed to when the set speed is reached in the second operating mode; the first starting rate is greater than the second starting rate.

[0006] In some embodiments of this application, the first start-up parameter includes a first rotation time, which is the time it takes for the motor speed to reach the set speed from the moment the trigger switch is closed in the first operating mode; the second start-up parameter includes a second rotation time, which is the time it takes for the motor speed to reach the set speed from the moment the trigger switch is closed in the second operating mode; the first rotation time is less than the second rotation time.

[0007] In some embodiments of this application, the first braking parameter includes a first braking rate, which is the rate of change of the motor speed from a set speed when the trigger switch is turned off to the point of stopping in the first operating mode; the second braking parameter includes a second braking rate, which is the rate of change of the motor speed from a set speed when the trigger switch is turned off to the point of stopping in the second operating mode; the first braking rate is greater than the second braking rate.

[0008] In some embodiments of this application, the first braking parameter includes a first braking time, which is the time it takes for the motor to stop rotating from a set speed when the trigger switch is turned off in the first operating mode; the second braking parameter includes a second braking time, which is the time it takes for the motor to stop rotating from a set speed when the trigger switch is turned off in the second operating mode; the first braking time is less than the second braking time.

[0009] In some embodiments of this application, a first mode signal is output when the mode switch is closed, and the power tool is in the first working mode; a second mode signal is output when the mode switch is open, and the power tool is in the second working mode.

[0010] In some embodiments of this application, the mode switching module further includes a capacitor, the first end of the mode switching switch and the first end of the capacitor are connected to the controller, and the second end of the mode switching switch and the second end of the capacitor are connected to a ground terminal.

[0011] In some embodiments of this application, when the mode switch is closed, the capacitor is short-circuited, the first terminal of the mode switch is grounded, the first terminal of the mode switch is in a low-level state, the first mode signal is a low-level signal, and the first mode signal is used to indicate that the power tool is in the first working mode; when the mode switch is open, the first terminal of the mode switch is grounded through the capacitor, the first terminal of the mode switch is in a high-impedance state, the second mode signal is a high-impedance signal, and the second mode signal is used to indicate that the power tool is in the second working mode.

[0012] In some embodiments of this application, the power tool further includes a display unit that displays the operating mode of the power tool.

[0013] In some embodiments of this application, the power tool is one of an electric drill, an angle grinder, or a cutting machine.

[0014] In this embodiment, the user can switch the working mode of the power tool by using the operation mode switch. This allows the user to adjust the motor speed according to their own preferences, avoiding problems such as the user dropping their hand, unstable grip, and misalignment of the workpiece caused by the force generated when the power tool is started or stopped, thereby improving the user experience. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is an overall structural diagram of a power tool provided in some embodiments of this application.

[0017] Figure 2 Block diagram of power tools provided for some embodiments of this application.

[0018] Figure 3 The following is a circuit diagram of the mode switching module in some embodiments of this application.

[0019] Explanation of icon numbers:

[0020]

[0021]

[0022] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0025] This application provides a power tool. (Reference) Figure 1 The diagram shown is an overall structural diagram of a power tool provided in some embodiments of this application. The power tool 100 includes a motor 1 (see reference). Figure 2 The power tool 100 comprises a housing 2, a trigger switch 3, and a mode switch 4. The housing 2 houses the motor 1. The housing 2 includes a grip 21. The trigger switch 3 is mounted on the grip 21. The trigger switch 3 controls the start or stop (start-stop) of the motor 1. The mode switch 4 is mounted on the outer surface of the housing 2 and controls the operating mode of the power tool 100, including a first operating mode and a second operating mode. The first operating mode includes a first start parameter for controlling the start of the power tool 100 and a first stop parameter for controlling the stop. The second operating mode includes a second start parameter for controlling the start of the power tool 100 and a second stop parameter for controlling the stop.

[0026] In some embodiments of this application, when the mode switch 4 is in the first state, the power tool 100 is in the first working mode. When the mode switch 4 is in the second state, the power tool 100 is in the second working mode. This application allows users to switch the working mode of the power tool 100 by operating the mode switch 4. This allows users to easily adjust the power tool 100 according to their preferences, avoiding problems such as slippage, unstable grip, and workpiece misalignment caused by the force generated when the power tool 100 is started or stopped, thereby improving the user experience.

[0027] In some embodiments of this application, when the trigger switch 3 is operated to control the motor 1 to start, if the power tool 100 is in a first working mode, the power tool 100 starts according to the first starting parameters; if the power tool 100 is in a second working mode, the power tool 100 starts according to the second starting parameters.

[0028] In some embodiments of this application, the first start parameter and the second start parameter include a start rate, which is a fixed value; the first start parameter includes a first start rate, which is the rate of change of the motor speed from the moment the trigger switch is closed until the set speed is reached in the first operating mode; the second start parameter includes a second start rate, which is the rate of change of the motor speed from the moment the trigger switch is closed until the set speed is reached in the second operating mode.

[0029] In some embodiments of this application, when the trigger switch 3 controls the motor 1 to start, if the power tool 100 is in a first working mode, the motor 1 of the power tool 100 increases from zero speed to a set speed according to a first starting rate; if the power tool 100 is in a second working mode, the motor 1 increases from zero speed to a set speed according to a second starting rate, wherein the first starting rate is greater than the second starting rate.

[0030] In some embodiments of this application, the first start parameter and the second start parameter include rotation time; the first start parameter includes a first rotation time, which is the time it takes for the motor speed to reach the set speed from the moment the trigger switch is closed in the first operating mode; the second start parameter includes a second rotation time, which is the time it takes for the motor speed to reach the set speed from the moment the trigger switch is closed in the second operating mode.

[0031] In some embodiments of this application, when the trigger switch 3 controls the motor 1 to start, if the power tool 100 is in a first working mode, the motor 1 of the power tool 100 increases from zero speed to a set speed within a first rotation time; if the power tool 100 is in a second working mode, the motor 1 increases from zero speed to a set speed within a second rotation time, wherein the first rotation time is less than the second rotation time; during the above starting process, the motor 1 is controlled to start at a linear or non-linear rate to ensure that the set speed is reached within the rotation time.

[0032] In some embodiments of this application, when the trigger switch 3 is operated to control the motor 1 to stop, if the power tool 100 is in a first working mode, the power tool 100 brakes according to a first braking parameter; if the power tool 100 is in a second working mode, the power tool 100 brakes according to a second braking parameter.

[0033] In some embodiments of this application, the first braking parameter and the second braking parameter include a braking rate, which is a fixed value; the first braking parameter includes a first braking rate, which is the rate of change of the motor speed from a set speed when the trigger switch is turned off to the point of stopping in the first operating mode; the second braking parameter includes a second braking rate, which is the rate of change of the motor speed from a set speed when the trigger switch is turned off to the point of stopping in the second operating mode.

[0034] In some embodiments of this application, when the trigger switch 3 controls the motor 1 to stop, if the power tool 100 is in a first working mode, the motor 1 of the power tool 100 reduces from a set speed to zero speed according to a first braking rate; if the power tool 100 is in a second working mode, the motor 1 reduces from a set speed to zero speed according to a second braking rate, wherein the first braking rate is greater than the second braking rate.

[0035] In some embodiments of this application, the first braking parameter and the second braking parameter include braking time. The first braking parameter includes a first braking time, which is the time it takes for the motor's rotational speed to stop from the moment the trigger switch is turned off in the first operating mode; the second braking parameter includes a second braking time, which is the time it takes for the motor's rotational speed to stop from the moment the trigger switch is turned off in the second operating mode.

[0036] In some embodiments of this application, when the trigger switch 3 controls the motor 1 to stop, if the power tool 100 is in a first working mode, the motor 1 of the power tool 100 reduces from a set speed to zero speed within a first braking time; if the power tool 100 is in a second working mode, the motor 1 reduces from a set speed to zero speed within a second braking time, wherein the first braking time is less than the second braking time; during the above braking process, the motor 1 is controlled to brake at a linear or non-linear rate to ensure that it brakes from the set speed to a stop within the rotation time.

[0037] In some embodiments of this application, when the mode switch 4 is closed, the power tool is in the first working mode, and when the mode switch 4 is open, the power tool is in the second working mode; or when the mode switch 4 is closed, the power tool is in the second working mode, and when the mode switch 4 is open, the power tool is in the first working mode.

[0038] refer to Figure 2 The diagram shown is a block diagram of a power tool provided in some embodiments of this application. The power tool 100 includes, but is not limited to, a mode switching module 5, a controller 6, a motor drive circuit 7, and a motor 1. The mode switching module 5 is connected to the controller 6, and the motor drive circuit 7 is connected to both the controller 6 and the motor 1. The mode switching module 5 includes a mode switching switch 4. The mode switching switch 4 is used to control the operating mode of the power tool 100. When the controller 6 detects that the mode switching switch 4 is in a first state, it controls the motor drive circuit 7 to drive the motor 1, thus placing the power tool 100 in a first operating mode. When the controller 6 detects that the mode switching switch 4 is in a second state, it controls the motor drive circuit 7 to drive the motor 1, thus placing the power tool 100 in a second operating mode.

[0039] In some embodiments of this application, the controller 6 controls the operating mode of the power tool 100 based on the state of the output of the mode switching module 5. (See reference...) Figure 3The diagram shown is a circuit diagram of a mode switching module in some embodiments of this application. In some embodiments of this application, the mode switching module 5 further includes a capacitor 12. The mode switching switch 4 is connected in parallel with the capacitor 12, and the mode switching switch 4 and the capacitor 12 are grounded. Specifically, the first end of the mode switching switch 4 is connected to the first end of the capacitor 12, the first end of the mode switching switch 4 is the output terminal of the mode switching module 5, and the first end of the mode switching switch 4 is connected to the controller 6. The second end of the mode switching switch 4 and the second end of the capacitor 12 are connected to the ground terminal 13. In some embodiments of this application, the first end of the mode switching switch 4 is connected to the input / output (IO) pin of the controller 6. In some embodiments of this application, the capacitor 12 is used to filter out noise from the mode switching module 51 and smooth the output voltage of the output terminal of the mode switching module 5. In some embodiments of this application, the capacitance of the capacitor 12 is 0.1uF, and the rated voltage of the capacitor is 25V.

[0040] In some embodiments of this application, the mode switch 4 can be a toggle switch. If the mode switch 4 is in the open state, pressing the mode switch 4 can trigger the mode switch 4 to close; if the mode switch 4 is in the closed state, pressing the mode switch 4 can trigger the mode switch 4 to open. In some embodiments of this application, when the mode switch 4 is pressed, it triggers the mode switch 4 to close and outputs a first mode signal. The capacitor 12 is short-circuited, the first terminal of the mode switch 4 is grounded, the output terminal of the mode switching module 5 is in a low-level state, and the first mode signal is a low-level signal. The first mode signal is used to indicate that the power tool 100 is in the first working mode. When the mode switch 4 is not pressed, it triggers the mode switch 4 to open and outputs a second mode signal. The first terminal of the mode switch 4 is grounded through the capacitor 12, the output terminal of the mode switching module 5 is in a high-impedance state, and the second mode signal is a high-impedance signal. The second mode signal is used to indicate that the power tool 100 is in the second working mode. The controller 6 determines that the power tool 100 is in a first operating mode when it detects that the output of the mode switching module 5 is in a low-level state; and determines that the power tool 100 is in a second operating mode when it detects that the output of the mode switching module 5 is in a high-impedance state. In some embodiments of this application, the voltage of the low-level state is 0V.

[0041] In some embodiments of this application, the controller 6 includes a storage unit storing first start parameters and first stop parameters for controlling the power tool 100 to start and stop in a first operating mode, and second start parameters and second stop parameters for controlling the power tool 100 to start and stop in a second operating mode. The first operating mode includes the first start parameters and first stop parameters for controlling the power tool 100 to start and stop; the second operating mode includes the second start parameters and second stop parameters for controlling the power tool 100 to start and stop.

[0042] Specifically, when the trigger switch 3 controls the motor 1 to start, if the controller 6 detects that the output terminal of the mode switching module 5 is in a low-level state, it determines that the power tool 100 is in the first working mode and controls the motor drive circuit 7 to drive the motor 1 to start according to the first starting parameters; if the controller 6 detects that the output terminal of the mode switching module 5 is in a high-impedance state, it determines that the power tool 100 is in the second working mode and controls the motor drive circuit 7 to drive the motor 1 to start according to the second starting parameters.

[0043] Specifically, when the trigger switch 3 controls the motor 1 to start, if the controller 6 detects that the output terminal of the mode switching module 5 is in a low-level state, it determines that the power tool 100 is in a first working mode, and controls the motor drive circuit 7 to drive the motor 1 to increase from zero speed to a set speed according to a first starting rate; if the controller 6 detects that the output terminal of the mode switching module 5 is in a high-impedance state, it determines that the power tool 100 is in a second working mode, and controls the motor drive circuit 7 to drive the motor 1 to increase from zero speed to a set speed according to a second starting rate, wherein the first starting rate is greater than the second starting rate.

[0044] In some embodiments of this application, when the trigger switch 3 controls the motor 1 to start, if the controller 6 determines that the power tool 100 is in a first working mode, it controls the motor drive circuit 7 to drive the motor 1 to increase from zero speed to a set speed within a first rotation time; if the controller 6 determines that the power tool 100 is in a second working mode, it controls the motor drive circuit 7 to drive the motor 1 to increase from zero speed to a set speed within a second rotation time, wherein the first rotation time is less than the second rotation time.

[0045] In some embodiments of this application, when the trigger switch 3 controls the motor 1 to stop, if the controller 6 detects that the output terminal of the mode switching module 5 is in a low-level state, it determines that the power tool 100 is in a first working mode and controls the motor drive circuit 7 to drive the motor 1 to stop according to the first braking parameter; if the controller 6 detects that the output terminal of the mode switching module 5 is in a high-impedance state, it determines that the power tool 100 is in a second working mode and controls the motor drive circuit 7 to drive the motor 1 to stop according to the second braking parameter.

[0046] Specifically, when the trigger switch 3 controls the motor 1 to stop, if the controller 6 determines that the power tool 100 is in the first working mode, it controls the motor drive circuit 7 to drive the motor 1 to reduce from the set speed to zero speed according to the first braking parameter; if the controller 6 determines that the power tool 100 is in the second working mode, it controls the motor drive circuit 7 to drive the motor 1 to reduce from the set speed to zero speed according to the second braking parameter, wherein the first braking rate is greater than the second braking rate.

[0047] In some embodiments of this application, when the trigger switch 3 controls the motor 1 to stop, if the controller 6 determines that the power tool 100 is in a first working mode, it controls the motor drive circuit 7 to drive the motor 1 to reduce from a set speed to zero speed within a first braking time; if the controller 6 determines that the power tool 100 is in a second working mode, it controls the motor drive circuit 7 to drive the motor 1 to reduce from a set speed to zero speed within a second braking time, wherein the first braking time is shorter than the second braking time.

[0048] Please continue to refer to this. Figure 2 In some embodiments of this application, the power tool 100 further includes a display unit 8. The display unit 8 displays the current operating mode of the power tool 100, thereby assisting the user in operating the power tool 100 according to the displayed operating mode.

[0049] In some embodiments of this application, the power tool 100 is one of an electric drill, an angle grinder, or a cutting machine.

[0050] In this embodiment, the user can switch the working mode of the power tool by using the operation mode switch. This allows the user to adjust the motor speed according to their own preferences, avoiding problems such as the user dropping their hand, unstable grip, and misalignment of the workpiece caused by the force generated when the power tool is started or stopped, thereby improving the user experience.

[0051] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A power tool, characterized in that, The power tool includes: Electric motor; A housing that houses the motor, the housing including a gripping portion; A trigger switch is installed on the grip, and the trigger switch is used to control the start and stop of the motor; A mode switching module, comprising a mode switching switch mounted on the outer surface of the housing, for switching the working mode of the power tool, the working mode including a first working mode and a second working mode; When the mode switch is in the first state, the power tool is in the first working mode; when the mode switch is in the second state, the power tool is in the second working mode. In the first operating mode, the control parameters of the motor include a first starting parameter for controlling the motor to start and a first braking parameter for controlling the motor to stop; in the second operating mode, the control parameters of the motor include a second starting parameter for controlling the motor to start and a second braking parameter for controlling the motor to stop, wherein the first starting parameter and the second starting parameter are different, and the first braking parameter and the second braking parameter are different.

2. The power tool as described in claim 1, characterized in that, The first starting parameter includes a first starting rate, which is the rate of change of the motor speed during the period from when the trigger switch is closed to when the set speed is reached in the first working mode. The second starting parameter includes a second starting rate, which is the rate of change of the motor speed in the second operating mode from the moment the trigger switch is closed until the set speed is reached. The first startup rate is greater than the second startup rate.

3. The power tool as described in claim 1, characterized in that, The first start-up parameter includes a first rotation time, which is the time it takes for the motor to reach the set speed from the moment the trigger switch is closed in the first working mode. The second start-up parameter includes a second rotation time, which is the time it takes for the motor to reach the set speed from the moment the trigger switch is closed in the second working mode. The first rotation time is less than the second rotation time.

4. The power tool as described in claim 1, characterized in that, The first braking parameter includes a first braking rate, which is the rate of change of the motor speed from a set speed when the trigger switch is turned off to the point of stopping in the first operating mode. The second braking parameter includes a second braking rate, which is the rate of change of the motor speed from a set speed when the trigger switch is turned off to the point of stopping in the second operating mode. The first braking rate is greater than the second braking rate.

5. The power tool as described in claim 1, characterized in that, The first braking parameter includes a first braking time, which is the time it takes for the motor to stop rotating from a set speed when the trigger switch is turned off in the first operating mode. The second braking parameter includes a second braking time, which is the time it takes for the motor to stop rotating from a set speed when the trigger switch is turned off in the second operating mode. The first braking time is shorter than the second braking time.

6. The power tool as claimed in claim 1, characterized in that, When the mode switch is closed, a first mode signal is output, and the power tool is in the first working mode. When the mode switch is open, a second mode signal is output, and the power tool is in the second working mode.

7. The power tool as described in claim 6, characterized in that, The mode switching module also includes a capacitor. The first end of the mode switching switch and the first end of the capacitor are connected to the controller, and the second end of the mode switching switch and the second end of the capacitor are connected to the ground terminal.

8. The power tool as claimed in claim 7, characterized in that, When the mode switch is closed, the capacitor is short-circuited, the first terminal of the mode switch is grounded, the first terminal of the mode switch is in a low-level state, the first mode signal is a low-level signal, and the first mode signal is used to indicate that the power tool is in the first working mode. When the mode switch is off, the first terminal of the mode switch is grounded through the capacitor, and the first terminal of the mode switch is in a high-impedance state. The second mode signal is a high-impedance signal, and the second mode signal is used to indicate that the power tool is in the second working mode.

9. The power tool as claimed in claim 1, characterized in that, The power tool also includes a display unit that displays the operating mode of the power tool.

10. The power tool as claimed in claim 1, characterized in that, The power tool is one of an electric drill, an angle grinder, or a cutting machine.

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