WO2024046411A1 - 电动工具 - Google Patents

电动工具 Download PDF

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Publication number
WO2024046411A1
WO2024046411A1 PCT/CN2023/116056 CN2023116056W WO2024046411A1 WO 2024046411 A1 WO2024046411 A1 WO 2024046411A1 CN 2023116056 W CN2023116056 W CN 2023116056W WO 2024046411 A1 WO2024046411 A1 WO 2024046411A1
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WO
WIPO (PCT)
Prior art keywords
motor
control circuit
signal
time
component
Prior art date
Application number
PCT/CN2023/116056
Other languages
English (en)
French (fr)
Inventor
张煜
郭士银
威廉·休斯加雷思
王建杰
王健
Original Assignee
苏州宝时得电动工具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 苏州宝时得电动工具有限公司 filed Critical 苏州宝时得电动工具有限公司
Publication of WO2024046411A1 publication Critical patent/WO2024046411A1/zh

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00Programme-control systems
    • G05B19/02Programme-control systems electric
    • G05B19/04Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/02Details of starting control
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P1/00Arrangements for starting electric motors or dynamo-electric converters
    • H02P1/16Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters

Definitions

  • This application requires a Chinese patent application with an application date of August 31, 2022, an application number of CN202211055421.5, and an invention name of "Power tools and motor control methods for power tools".
  • the application date is April 28, 2023.
  • the Chinese patent application with the application number CN202310484470.9 and the invention name "Power tools and motor control methods for power tools” and the application date is June 27, 2023 with the application number CN202310768279.7 and the invention name "Power Tools" Priority rights for Chinese patent applications.
  • the present invention relates to the technical field of electric equipment, and in particular to motor control of electric tools.
  • One embodiment of the present application provides an electric tool, including: a host; a functional component, including a working part and a motor that drives the working part; a motor start switch that controls the motor in response to a user's operation; a pusher component that connects all The main machine, the push hand part can rotate around the main machine, the rotation area of the push hand part includes a working position area and a non-working position area, when the push hand part is in the working position area, the pushing hand part and the
  • the main unit is relatively fixed and is used for user operation to push the main unit to move; an adjustment member and an adapter. When the adjustment member cooperates with the adapter, the pusher component is locked to the main unit.
  • a signal unit is used to feedback different states in response to the position change of the push hand component.
  • the signal unit can feed back a first status signal, when the push hand component is in the non-working position area, The signal unit feeds back a second status signal;
  • a control circuit is used to receive the status signal fed back by the signal unit, and adjust and start the control logic of the motor according to the different received status signals; when the control circuit Upon receiving the first status signal, the control circuit controls the motor to start working according to the first control logic.
  • the control circuit receives the second status signal, the control circuit controls all the motors according to the second control logic. The motor starts working, and the second control logic is different from the first control logic.
  • the power tool includes a power-on switch that is triggered in response to a user's operation to switch the control circuit between an inactive state and an activated state.
  • the control circuit When the control circuit is in In the activated state, the control circuit allows the current of the power supply to flow to the motor; when the control circuit is in the inactive state, the control circuit prohibits the current of the power supply from flowing to the motor, wherein the power-on
  • the time from when the switch is triggered to when the control circuit switches from the inactive state to the active state is defined as the trigger holding time of the power-on switch;
  • the motor start switch includes a first operating element, and the third An operating element outputs a motor start signal in response to user operation, the control circuit is in the activation state and the first operating element is triggered, and the control circuit controls the current of the power supply to flow to the motor so that the The motor drives the working part to work, wherein the control circuit enters the activation state and is allowed to receive the motor start signal at a preset time, where the prese
  • control circuit further includes a timing unit, so that the control circuit determines whether the trigger holding time of the power-on switch meets a preset condition based on the timing time of the timing unit, and/or the The control circuit further includes a timing unit, so that the control circuit determines whether the allowed triggering time of the first operating element meets the preset condition according to the timing time of the timing unit.
  • the first control logic at least includes: the trigger holding time of the power-on switch reaches the first holding time, allowing the control The circuit enters the activated state;
  • the second control logic at least includes: the trigger holding time of the power-on switch reaches the second holding time, allowing the control circuit to enter the activated state; wherein the second holding time is greater than the first holding time, and the second holding time is greater than Equal to 3 times the first hold time.
  • the first control logic further includes: when the control circuit enters the activation state, the allowed triggering time of the first operating element is configured within the first preset time, and the control circuit is within The motor start signal is received within the first preset time, and the current from the power supply is controlled to flow to the motor, so that the motor driving part works;
  • the second control logic at least includes: when the control circuit enters the activation state, the allowed triggering of the first operating element The time is configured within the second preset time, and the control circuit receives the motor start signal within the second preset time, controls the current flow from the power supply to the motor, and causes the motor drive working part to work, wherein the second preset time is shorter than the first Preset time.
  • the second control logic at least includes: the allowed triggering time of the motor start switch is configured to be spaced from a preset fixed time point from the control circuit entering the activation state, and the control circuit is allowed to receive the motor start signal at the fixed time point to Controls the flow of current from the power supply to the motor, causing the motor drive unit to operate.
  • the second holding time is greater than or equal to 2s; the second preset time is less than or equal to 5s.
  • the second control logic at least includes: the allowed triggering time of the first operating element is configured as a fixed time point separated by a first preset time from the control circuit entering the activation state, and The control circuit allows receiving the motor start signal at the fixed time point to control the current flow of the power supply to the motor so that the motor drives the working part to work.
  • the motor start switch further includes an unlocking element configured to output an unlocking signal in response to user operation;
  • the first control logic at least includes: when the control circuit enters the activation state, the The continuous triggering time of the unlocking element from being triggered until the control circuit receives the unlocking signal reaches a third holding time, and the control circuit is allowed to receive the motor start signal to control the motor start signal according to the motor start signal.
  • the current of the power supply flows to the motor, so that the motor drives the working part to work;
  • the second control logic at least includes: when the control circuit enters the activation state, the unlocking element starts from being triggered until the The continuous triggering time of the control circuit receiving the unlocking signal reaches the fourth holding time, and the control circuit is allowed to receive the motor start signal to control the current flow of the power supply to the motor according to the motor start signal, so as to The motor drives the working part to work;
  • the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to 3 times of the third holding time
  • the motor start switch further includes an unlocking element configured to output an unlocking signal in response to user operation, and the control circuit allows receiving the motor start signal after receiving the unlocking signal;
  • the second control logic at least includes: when the control circuit enters the activation state, there is a preset fixed time interval between the control circuit entering the activation state and the control circuit receiving the unlocking signal.
  • the power tool further includes a power supply mounting portion for installing a power supply
  • the power supply includes a battery pack
  • the battery pack is detachably connected to the power supply mounting portion to power the power tool
  • the control circuit enters an activated state in response to the battery pack being installed on the power supply mounting part
  • the motor start switch includes an unlocking element and a first operating element, the unlocking element outputs an unlocking signal in response to user operation, and the first operating element
  • the operating element outputs a motor start signal in response to user operation
  • the first control logic also includes: when the control circuit enters the activation state, the unlocking element starts from being triggered until the control circuit receives the unlocking signal.
  • the second control logic also includes: when the control circuit enters the activation state, the continuous triggering time of the unlocking element from being triggered until the control circuit receives and outputs the unlocking signal reaches the fourth holding time. , allowing the control circuit to receive the motor start signal, and control the current flow of the power supply to the motor according to the motor start signal, so that the motor drives the working part to work; the fourth holding time is greater than The third holding time, and the fourth holding time is greater than or equal to 3 times of the third holding time.
  • the first control logic further includes: the control circuit allows the motor start signal to be received within a first preset time; the second control logic further includes: the control circuit allows the motor start signal to be received within the second preset time, The second preset time is less than the first preset time.
  • the second control logic further includes: the control circuit allows the motor start signal to be received at fixed time points spaced by a preset time since the fourth holding time is reached.
  • the control circuit when the signal unit feeds back the first status signal, the control circuit allows the motor to start working at least at the first speed; when the signal unit feeds back the second status signal, the control circuit allows the motor to start working at least at the second speed, The second speed is not greater than the first one-third of the rotational speed.
  • the second rotational speed is no greater than one-fifth of the first rotational speed.
  • control circuit is also used to control the motor to run at the second speed and then stop for a preset time, and the preset time is less than or equal to 5 seconds.
  • the electric tool includes a push lawn mower; the motor includes a cutting motor, the working part includes a cutting part, and the cutting motor is used to drive the cutting part to move to perform cutting work; And/or the motor includes a self-driving motor, the working part includes a moving component, and the self-driving motor is used to drive the moving component to move to drive the host to move.
  • the signal unit includes a micro switch, the signal unit is configured as a micro switch, the micro switch includes a trigger part and a switch part, the switch part is controlled by the trigger part, and the micro switch The switch switches between the off state and the on state in response to the change of the push handle component between the working position area and the non-working position area, wherein the micro switch is in the off state or the In the on state, the signal unit selectively feeds back the first state signal or the second state signal.
  • the signal unit is configured as a sensor, the sensor includes a first component and a second component, one of the first component and the second component is disposed on the host, and the other is disposed On the pusher component or the adjustment component, the first component is configured to feed back the first state signal or the second state to the control circuit based on the intensity of the signal emitted by the sensed second component. Signal.
  • a motor control method for an electric tool wherein the electric tool includes: a host; a functional component including a working part and a motor that drives the working part; a motor starting switch that controls the motor in response to the user's operation; a pusher component that connects In the main machine, the push hand part can rotate around the main machine.
  • the rotation area of the push hand part includes a working position area and a non-working position area. When the push hand part is in the working position area, the push hand part is in contact with the main body.
  • the main unit is relatively fixed and is used for user operation to push the main unit to move; an adjustment member and an adapter. When the adjustment member cooperates with the adapter, the pusher component is locked to the main unit.
  • a signal unit is used to feedback different signals in response to the position change of the push hand component.
  • Status signal when the push-hand part is in the working position area and the push-hand part is relatively locked with the host, the signal unit feeds back a first status signal; when the push-hand part is in the non-working position area, The signal unit feeds back the second status signal;
  • the motor control method includes: receiving a status signal fed back by the signal unit; when the status signal is a first status signal, controlling the motor to start working according to the first control logic; when the status signal is a second status signal, controlling the motor to start working according to the second control logic , the second control logic is different from the first control logic.
  • the control circuit includes a power-on switch, the power-on switch is used to be triggered in response to a user's operation, so that the control circuit switches between the inactive state and the activated state,
  • the control circuit switches between the inactive state and the activated state,
  • the control circuit allows the current of the power supply to flow to the motor;
  • the control circuit prohibits the current of the power supply to flow to the motor.
  • the time from when the power-on switch is triggered and maintains the triggering state until the control circuit switches from the inactive state to the activated state is defined as the trigger holding time of the power-on switch; the motor starts
  • the switch includes a first operating element, the first operating element is used to output a motor start signal in response to user operation, the control circuit is in the activation state and the motor start switch is triggered, the control circuit controls the power supply The current flows to the motor so that the motor drives the working part to work.
  • the control circuit enters the activation state and is allowed to receive the motor start signal within a preset time.
  • the preset time is defined as the The allowed triggering time of the motor start switch; the triggering holding time of the power-on switch is different under the first control logic and the second control logic; and/or under the first control logic and the second control logic, Under the two control logics, the allowable triggering time of the motor start switch is different.
  • the first control logic at least includes: determining whether the trigger holding time of the power-on switch reaches a first holding time; when the first holding time is reached, the control circuit is allowed to enter the activation state. state; the second control logic at least includes: judging whether the trigger holding time of the power-on switch reaches the second holding time; reaching the second holding time, allowing the control circuit to enter the activation state, and the third The second holding time is greater than or equal to 3 times the first holding time.
  • the first control logic further includes: when the control circuit enters the activation state, the motor start signal is allowed to be received within a first preset time; when the motor start signal is received , control the current flow from the power supply to the motor, so that the motor drives the working part to work;
  • the second control logic at least includes: the control circuit enters the activation state and allows receiving the Motor start signal. When receiving the motor start signal, the current from the power supply is controlled to flow to the motor so that the motor drives the working part to work.
  • the second preset time is shorter than the first Preset time.
  • the second control logic at least includes: allowing the motor start signal to be received at a fixed point at a preset time interval since the control circuit enters the activation state; upon receiving the motor start signal, The current from the power supply is controlled to flow to the motor, so that the motor drives the working part to work, and the second preset time is less than the first preset time.
  • the second holding time is greater than or equal to 2s; the second preset time is less than or equal to 5s.
  • the motor activation switch further includes an unlocking element including a stop operably coupled to the first operating element to prevent direct actuation of the first operating element.
  • the motor start switch further includes an unlocking element that responds to an unlocking signal output by a user operation; the first control logic at least includes: when the control circuit enters the activation state, determines the unlocking Whether the continuous triggering time of the element reaches the third holding time; when the third holding time is reached, the motor start signal is allowed to be received.
  • the second control logic at least includes: when the control circuit enters the activation state, determine whether the continuous triggering time of the unlocking element reaches the fourth holding time; reaching the fourth holding time time, allowing the motor start signal to be received, and when the motor start signal is received, the current from the power supply is controlled to flow to the motor, so that the motor drives the working part to work; the fourth holding The time is greater than the third holding time, and the fourth holding time is greater than or equal to 3 times of the third holding time.
  • the motor start switch further includes an unlocking element configured to output an unlocking signal in response to user operation, and the control circuit allows receiving the motor start signal after receiving the unlocking signal;
  • the second control logic at least includes: when the control circuit enters the activation state, there is a second preset time interval between the control circuit entering the activation state and the control circuit receiving the unlocking signal.
  • the first control logic further includes: starting from the time when the unlocking element is triggered and maintains the triggered state reaches the third holding time, allowing the receiving of the said unlocking element within a first preset time. Motor start signal;
  • the second control logic also includes: allowing the motor start signal to be received within a second preset time from the time the unlocking element is triggered and maintains the trigger state reaching the fourth holding time, or from The unlocking element is allowed to receive the motor start signal at a fixed time point separated by a preset time since it is triggered and maintains the triggering state until the fourth holding time, and the second preset time is less than the First preset time.
  • the power tool further includes a power supply installation part, the power supply includes a battery pack, the battery pack is detachably installed to the power supply installation part to power the power tool, and the control circuit enters the activated state in response to the battery pack being installed on the battery pack installation part;
  • the control circuit includes a motor start switch, the motor start switch includes an unlocking element and a first operating element, the unlocking element is used to output an unlocking signal in response to a user trigger, and the first operating element is used to output a motor start signal in response to a user trigger;
  • the first control logic at least includes : When the control circuit enters the activated state, it determines whether the continuous triggering time of the unlocking element reaches the third holding time; when the third holding time is reached, the motor start signal is allowed to be received.
  • the second control logic at least includes: when the control circuit enters the activation state, it is judged whether the continuous triggering time of the unlocking element reaches the fourth holding time; when the fourth holding time is reached, the motor start signal is allowed to be received.
  • the motor start signal is received, the current from the power supply is controlled to flow to the motor so that the motor driving working part operates for a fourth holding time greater than the third holding time, and the fourth holding time is greater than or equal to 3 times the third holding time.
  • the first control logic further includes: allowing the motor start signal to be received within the first preset time since the unlocking element is triggered and maintains the trigger state for a third holding time; the second control logic It also includes: allowing the motor start signal to be received within a second preset time since the unlocking element is triggered and the time it maintains the trigger state reaches the fourth holding time, and the second preset time is less than the first preset time; or since The unlocking element is allowed to receive a motor start signal at a fixed time point separated by a preset time since it is triggered and maintains the triggered state until the fourth holding time.
  • control method further includes: when receiving the first status signal, allowing the motor to start at the first speed; when receiving the second status signal, allowing the motor to start at the first speed
  • the rotation speed is the second rotation speed, and the second rotation speed is not greater than one-third of the first rotation speed.
  • control method further includes: controlling the motor to stop after controlling the motor to rotate according to the second rotation speed for a preset time.
  • An electric tool characterized in that it includes: a host; a functional component, including a working part and a motor that drives the working part to work; The motor starts the switch and controls the motor in response to the user's operation; the push hand component is connected to the host, and the push hand component can rotate around the host.
  • the rotation area of the push hand component includes a working position area and a non-working position area.
  • the push hand part It is unlocked from the host and can rotate around the host; the signal unit is used to feedback different status signals in response to the position change of the push hand component.
  • the signal unit feeds back the first status signal.
  • the control circuit receives the first status signal, it is allowed to The motor starts to work at the first speed.
  • the control unit receives the second status signal, the motor is allowed to start to work at the second speed, and the second speed is less than or equal to one-third of the first speed.
  • control circuit is also used to control the motor to run at the second speed and then stop for a preset time, and the preset time is less than or equal to 5 seconds.
  • a motor control method for an electric tool includes: a host; a functional component, including a working part and a motor that drives the working part; a motor starting switch that controls the motor in response to the user's operation; a pusher component connected to the host,
  • the push hand part can rotate around the main machine.
  • the rotation area of the push hand part includes a working position area and a non-working position area.
  • the push hand part When the push hand part is in the working position area, the push hand part is relatively fixed to the main machine and is used for user operation to push the main machine to move; the adjusting member and The adapter, when the adjustment part matches the adapter, the push hand part is locked on the main unit, when the adjustment part and the adapter are unfit, the push hand part is unlocked with the main unit and can rotate around the main unit; the signal unit, the signal unit is used to respond The position change of the push hand part feeds back different status signals. When the push hand part is in the working position area and the push hand part is relatively locked with the host, the signal unit feeds back the first status signal.
  • the signal unit Feed back the second status signal;
  • the control method includes: when receiving the first status signal, allowing the motor to start working at least at the first speed; when receiving the second status signal, allowing the motor to start working at least at the second speed, and the second The rotation speed is not greater than one-third of the first rotation speed.
  • An electric tool characterized in that it includes: a host; a functional component, including a working part and a motor that drives the working part; a motor start switch that controls the motor in response to the user's operation; a pusher component connected to the host and the pusher component It can rotate around the main machine.
  • the rotation area of the push hand part includes the working position area and the non-working position area. When the push hand part is in the working position area, the push hand part is relatively fixed to the main machine and is used for user operation to push the main machine to move; adjustment parts and couplings When the adjusting part and the adapter are matched, the push hand part is locked on the main unit.
  • the push hand part When the adjusting part and the adapter are unfit, the push hand part is unlocked on the main unit and can rotate around the main unit; the signal unit is used to respond to the push hand part. Position changes feed back different status signals.
  • the signal unit When the push hand part is in the working position area and the push hand part is relatively locked with the host, the signal unit feeds back the first status signal.
  • the signal unit When the push hand part is in the non-working position area, the signal unit feeds back the third status signal.
  • Two status signals a control circuit, used to receive the status signal fed back by the signal unit, and adjust the starting control logic of the motor according to the status signal; when the control circuit receives the first status signal, the control circuit controls the starting work of the motor according to the first control logic , when the control circuit receives the second status signal, the control circuit controls the motor to start working according to the second control logic, and the second control logic is different from the first control logic; when the control circuit receives the first status signal, it also allows the motor to start according to the second control logic.
  • the control unit starts working at one speed
  • the control unit receives the second status signal it also allows the motor to start working at a second speed, and the second speed is less than or equal to one-third of the first speed.
  • control method further includes: controlling the motor to stop after controlling the motor to rotate according to the second rotation speed for a preset time.
  • Figure 1 is a schematic structural diagram of an electric tool in a working state provided by an embodiment of the present application
  • Figure 2 is a schematic structural diagram of an electric tool in an intermediate storage state provided by an embodiment of the present application
  • Figure 3 is a schematic diagram of a control circuit module of an electric tool provided by an embodiment of the present application.
  • Figure 4 is a partial schematic diagram of the push handle component structure provided by an embodiment of the present application.
  • Figure 5 is a structural cross-sectional view of the electric tool when the operating part is in a locked state according to an embodiment of the present application
  • Figure 6 is a structural cross-sectional view of the electric tool when the operating member is in an unlocked state according to an embodiment of the present application
  • Figure 7 is a schematic structural diagram of an adjustment component provided in an embodiment of the present application.
  • Figure 8 is an exploded schematic diagram of the adjustment component structure provided by one embodiment of the present application.
  • Figure 9 is a schematic diagram of the base structure provided by an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of an adjusting member provided in an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of an electric tool in a working state provided by yet another embodiment of the present application.
  • Figure 12 is a schematic structural diagram of an electric tool in an intermediate storage state provided by yet another embodiment of the present application.
  • Figure 13 is a schematic structural diagram of an electric tool in a fully stowed state provided by yet another embodiment of the present application.
  • Figure 14 is a schematic diagram of signal coverage area analysis of the second component provided in an embodiment of the present application.
  • FIG. 15 is a flowchart 1 of the power tool start control provided by an embodiment of the present application.
  • Figure 16 is a second flow chart of power tool start control provided by yet another embodiment of the present application.
  • Figure 17 is a third flow chart of power tool start control provided by yet another embodiment of the present application.
  • Figure 18 is a flowchart 4 of the power tool start control provided by yet another embodiment of the present application.
  • the present application provides an electric tool that can reduce the probability of false start of the electric tool during the folding process of the pusher part and improve the safety of the electric tool.
  • the electric tool of the present application may be a push lawn mower or other types of hand push electric tools, and is not limited to a push lawn mower.
  • the electric tool 100 includes: a host 10 , a pusher component 20 , a functional component 30 , a motor start switch 15 , a signal unit 40 and a control circuit (not shown in FIGS. 1 and 2 ).
  • the functional component 30 is disposed on the host 10.
  • the functional component 30 includes a motor 13 and a working part 31.
  • the motor 13 is used to drive the working part 31 to drive the host 10 to move within a set path or working area, and/or to perform work tasks.
  • the motor start switch 15 is used to control the start of the motor 13 in response to user operations.
  • the power tool also includes a power supply mounting part for installing the power supply.
  • the power supply includes a battery pack, which is detachably connected to the power supply installation part to provide power to the electric tool. After the electric tool is powered on, the motor start switch 15 can control the start of the motor 13 in response to user operations.
  • the pusher component 20 is connected to the main body 10 and can rotate around the main body 10 .
  • the pushing hand part 20 has a first end and a second end, wherein the first end of the pushing hand part 20 is pivotably connected to the host 10 , and the second end of the pushing hand part 20 can be used by the user to hold and push the electric tool 100 to move.
  • the push handle component 20 may include a push rod 21 and an extension rod 22 .
  • the push rod 21 is connected to the host 10 through the extension rod 22 .
  • the push rod 21 is provided at the second end of the push handle part 20.
  • the push rod 21 is used for the user to hold to apply thrust to the power tool 100 and assist the power tool 100 in walking. At the same time, the user can change the power tool 100 by pushing the push rod 21. direction of movement.
  • the push handle component 20 can also be designed as a telescopic structure, for example, the push rod 21 can be slidably sleeved on the extension rod 22, etc.
  • the rotation area of the pusher component 20 includes a working position area and a non-working position area except the working position area.
  • the power tool is placed on the ground, and the direction parallel to the forward direction of the power tool is defined as the longitudinal direction of the power tool (see Figures 1 to 2).
  • the left side of the longitudinal direction of the power tool is defined as the power tool.
  • the front side of the power tool, and the right side of the power tool in the longitudinal direction is the rear side of the power tool.
  • the working position area can generally be understood as a rotation area in which the pusher component 20 can be locked at a preset position of the main unit 10 so that the user can push the main unit 10 to move on a plane and control the power tool to perform work tasks.
  • the host 10 is provided with multiple preset positions in the working position area, and the pusher component 20 can be locked in one of the preset positions, or can be unlocked and rotated from one preset position to another preset position. .
  • the non-working position area can generally be understood as, in this rotation area, the pusher component 20 is 10 Rotate and fold to the storage state (for example, Figure 2, Figure 12, Figure 13).
  • the overall space occupied by the electric tool can be reduced, making it easier to transport and store the electric tool.
  • FIG. 1 when the push-hand component 20 is fixed at the first position 511 and the push-hand component 20 is in the working position area, the push-hand component 20 is in the working state at this time.
  • FIG. 2 when the push-hand part 20 is fixed at the third position 517 and the push-hand part 20 is in the non-working position area, the push-hand part 20 is in the stowed state.
  • the push handle component 20 can rotate from the first position 511 to the third position 517 , and can also rotate from the third position 517 to the first position 511 .
  • FIG. 1 and FIG. 2 are only examples. In actual operation, the rotation angle corresponding to the rotation range of the pusher component 20 around the host may be greater than or equal to 90°.
  • the electric tool 100 also includes an adjustment component 50 for adjusting the rotational position of the push handle component 20 relative to the main machine 10 .
  • the adjustment part 50 includes an adapter part 51 and an adjustment part 52 .
  • the adapter part 51 cooperates with the adjusting part 52
  • the push handle part 20 is locked relative to the main body 10 .
  • the adapter 51 and the adjustment member 52 are unfitted, the pusher component 20 is unlocked from the main unit 10 and can rotate around the main unit 10 under the operator's operation.
  • the user can fix or unfix the push handle part 20 by operating the adapter part 51 or the adjustment part 52 .
  • one of the adapter part 51 and the adjustment part 52 may be provided on the main body 10 and the other one may be provided on the push handle component 20 .
  • the push handle component 20 is provided with a switch assembly, and the switch assembly is used to control the starting of the motor. If the user mistakenly triggers the switch assembly when rotating the push handle component 20, the power tool 100 may be powered on and started. Since the user is close to the working part at this time, the user may be in a dangerous state.
  • the electric tool 100 provided in this embodiment is further provided with a signal unit 40 on the host 10 and/or the pusher component 20 .
  • the signal unit 40 can respond to position changes of the pusher component 20 to feed back different status signals. When the pusher component 20 is in the working position and is relatively locked with the host, the signal unit 40 feeds back the first status signal. When the pusher component 20 is in the non-working position, the signal unit 40 feeds back the second status signal.
  • the pushing hand part 20 when the pushing hand part 20 is in the working position area and the pushing hand part 20 and the host 10 are unlocked, different configurations of the signal unit 40 and the cooperation methods of the signal units with different configurations and the pushing hand part 20 are different, resulting in the signal unit 40
  • the first status signal may be fed back
  • the second status signal may also be fed back.
  • the signal unit 40 may feed back a first state signal or a second state signal.
  • the signal unit 40 may be a mechanical trigger switch. When the pusher component 20 moves to a preset area (working position area or non-working position area), the trigger switch is triggered or released in response to the position change of the pusher component 20 to feedback different states. Signal.
  • the signal unit 40 can also be an electrical induction unit. When the position of the pusher component 20 changes, the induction signals generated by the electrical induction unit are of different strengths. The induction signals of different strengths represent different status signals. For example, the induction signal is lower than a preset threshold. , the sensor switch feeds back the first state signal. If the sensor signal is higher than the preset threshold, the sensor switch feeds back the second state signal, and vice versa.
  • the specific structure of the signal unit 40 will be described in detail below.
  • the control circuit is connected to the signal unit 40, and is used to identify the current position of the pusher component 20 based on the first state signal and the second state signal fed back by the signal unit 40, and adjust the starting control logic of the motor accordingly.
  • the control circuit includes a main control unit.
  • the main control unit may be a component with analysis, calculation, and control functions.
  • the main control unit may be but is not limited to a PLC (Programmable Logic Controller translated as programmable logic controller). , ECU (Electronic Control Unit translated as electronic control unit) or microcontroller, etc.
  • the main control unit is connected to the signal unit 40 for receiving the status signal fed back by the signal unit 40 and controlling the operation of the motor according to the status signal.
  • the main control unit uses the first control logic to control the motor to start working.
  • the main control unit uses the second control The logic controls the motor to start working, and the second control logic is different from the first control logic.
  • the control circuit not only includes the main control unit, but also includes other circuits, such as switch control circuits, power supply circuits, any circuit or a combination of multiple circuits. In this embodiment, the control circuit can be understood as the entire machine. circuit.
  • a signal unit 40 is configured to detect the position of the push hand component 20, and a control circuit is configured to use different control logics to control the start of the motor 13 when the push hand component 20 is in different position areas according to the detection results of the signal unit 40, so that the push hand component The starting difficulty of the motor 13 is different when 20 is in different position zones.
  • the control circuit uses the second control logic to control the motor start, by changing the action sequence of the switch component and/or extending the power-on time after the switch component is triggered, so that compared with the first Control logic: Under the second control logic, the motor is more difficult to start, which can reduce the probability that the user accidentally triggers the switch assembly when the book pusher component 20 is in the stowed state, causing the power tool to start incorrectly, reducing the user's risk and improving the safety of the power tool. sex.
  • the power tool further includes a power-on switch 11 .
  • the power-on switch 11 is used to be triggered in response to a user's operation to switch the control circuit between an inactive state and an activated state.
  • the control circuit allows current from the power supply 12 to flow to the motor 13 .
  • the control circuit prohibits current from the power supply 12 from flowing to the motor 13 .
  • the motor start switch 15 includes a first operating element 62, which is used to output a motor start signal in response to a user operation when being triggered. Under the first control logic and the second control logic, the trigger holding time of the power-on switch 11 is different; and/or under the first control logic and the second control logic, the allowed triggering time of the first operating element 62 is different.
  • the control circuit when the control circuit is in an activated state, allowing the current of the power supply 12 to flow to the motor 13 can be understood to mean that the power supply loop from the power supply 12 to the motor 13 can be turned on, but it needs to be turned on under certain conditions.
  • the power supply circuit from the power supply 12 to the motor 13 can be controlled by the main control unit 14 .
  • the main control unit 14 When the control circuit is in an activated state, the main control unit 14 only controls the power supply circuit from the power supply 12 to the motor 13 to be turned on when receiving the motor start signal, so that the motor 13 drives the working part to work.
  • the main control unit 14 When the control circuit is in an inactive state, the main control unit 14 is configured to be unable to receive the motor start signal, and therefore cannot control the conduction of the power supply circuit from the power supply 12 to the motor 13 . Alternatively, the main control unit 14 is configured not to control the power supply loop from the power supply 12 to the motor 13 to be turned on even if it receives the motor start signal.
  • the trigger holding time of the power-on switch 11 is preset to be different, so that the control circuit
  • the time allowed to enter the activation state is different, or the allowed triggering time of the first operating element 62 is preset to be different, so that the main control unit 14 is allowed to receive the motor start signal at a different time, or the trigger holding time of the electric switch 11 and the first operating element are set. 62 have different allowable trigger times.
  • the trigger holding time of the power-on switch 11 can be understood as the time from when the power-on switch 11 is triggered and maintains the trigger state until the control circuit switches from the inactive state to the activated state.
  • the power-on switch 11 is a push-button switch. The user presses the push-button switch and maintains the pressed state until the preset trigger holding time is reached, and then the control circuit enters the activated state.
  • the power-on switch 11 is a rotary switch. The user rotates the power-on switch to a preset angle and keeps the switch rotating at the preset angle until the preset trigger holding time is reached, and then the control circuit enters the activation state.
  • the allowed triggering time of the first operating element 62 can be understood as the preset time that the main control unit 14 is allowed to receive the motor start signal since the control circuit enters the activation state.
  • the preset time may be a preset time period or a fixed time point.
  • the first operating element 62 can be a trigger.
  • the user can control the motor 13 to start by pulling the trigger.
  • the 10th s since the control circuit enters the activation state that is, a fixed time point at a preset time interval
  • the user can control the motor 13 to start by pulling the trigger.
  • control circuit under the first control logic and the second control logic to have different triggering holding times in response to the power-on switch 11, and/or in response to the allowed triggering time of the first operating element 62, so that when the push rod is in operation position area, the user can easily trigger the power-on switch 11 and the first operating element 62 to start the motor 13.
  • the operation difficulty of triggering the power-on switch 11 and the motor start switch 15 is increased.
  • the probability of the motor 13 being powered on and started is reduced, thereby improving the safety of the electric tool when the push handle part 20 is in the stowed state.
  • the first control logic at least includes: the trigger holding time of the power-on switch 11 reaches the first holding time, allowing the control circuit to enter the activation state.
  • the second control logic at least includes: the trigger holding time of the power-on switch 11 reaches the second holding time, allowing the control circuit to enter the activation state. Wherein, the second holding time is greater than the first holding time.
  • control circuit includes a timing unit 16, and the control circuit determines whether the trigger holding time of the power-on switch 11 meets the preset condition (that is, whether the first holding time or the second holding time is reached) based on the timing time of the timing unit 16. When the trigger holding time meets the preset conditions, the control circuit is allowed to enter the active state.
  • the preset condition that is, whether the first holding time or the second holding time is reached
  • the timing unit 16 is used to start timing from the moment the power-on switch 11 is triggered, and send a timing signal to the main control unit 14 when the timing time reaches the preset first holding time or the second holding time, so as to Put the control circuit into active state.
  • the timing unit may be set outside the main control unit 14 and connected to the main control unit 14 , or may be integrated within the main control unit 14 .
  • the timing unit 16 is provided outside the main control unit 14. As shown in FIG. 3, the timing unit 16 is provided on the switch control unit 111 of the control circuit together with the power-on switch 11 and the first operating element 62. When the switch control unit 111 detects that the power-on switch 11 is triggered, the switch control unit 111 controls the timing unit 16 to start timing, and when the timing time reaches the preset first holding time or the second holding time, send a timing signal to the main control Unit 14.
  • the timing unit 16 can also be integrated in the main control unit 14, and the power-on switch 11 and the motor start switch 15 are set in the switch control unit 111.
  • the switch The control unit 111 controls the power supply loop from the power supply 12 to the main control unit 14 to be turned on.
  • the main control unit 14 is powered on and controls the timing unit 16 to start timing.
  • the control circuit enters the activation state.
  • this embodiment also provides a display unit 17 .
  • the display unit 17 is connected to the switch control unit 111 and is controlled by the switch control unit 111 .
  • the switch control unit 111 controls the display unit 17 to light up to prompt the operator that the control circuit enters the activation state, so that the operator can control the display unit 17 After lighting, the first operating element 62 is triggered to start the motor.
  • the display unit 17 By arranging the display unit 17, not only can the operator be reminded when the motor start switch can be operated when the pusher component 20 is in the working position, but also the operator can be reminded of the current control circuit of the whole machine when the pusher component 20 is in the non-working position. has been activated to prevent the operator from further operating the first operating element 62 causing the motor to start incorrectly, which can further improve the safety of the electric tool.
  • the second holding time is greater than or equal to 3 times the first holding time.
  • the second holding time is greater than or equal to 5 times the first holding time.
  • the second holding time may be 3 times, 5 times, 20 times, 50 times or 100 times the first holding time. The longer the second holding time is, the longer the power-on switch 11 needs to be continuously triggered, and the lower the probability of the user's false triggering.
  • the second holding time is greater than or equal to 2s, and the first holding time is less than or equal to 0.6s.
  • the first holding time may be 0s, 0.1s, 0.3s, 0.5s or 0.6s, etc.
  • the second holding time may be 2s, 5s, 10s, 15s, 20s or 30s, etc.
  • the user when the pusher component 20 is in the working position, the user only needs to trigger the power-on switch for 0.3 seconds to make the control circuit enter the activation state, and then the user triggers the first operating element. 62 can control the motor 13 to start working, so that the electric tool can be started conveniently.
  • the pusher component 20 When the pusher component 20 rotates to the non-working position, the user needs to continuously press or rotate the power switch for 30 seconds to activate the control circuit, and then trigger the first operating element 62 to control the motor 13 to start working.
  • the switch is usually turned on by pressing briefly. Therefore, the user basically does not think that the power switch needs to be pressed continuously for 30 seconds to activate the control circuit; and even if the user accidentally triggers the power switch, the user will not be able to activate the power switch. May continue to be accidentally touched for a long time.
  • the pusher component 20 When the pusher component 20 is in the non-working position, the user habitually triggers the power-on switch 11 briefly, and the control circuit cannot be activated. Therefore, the solution provided by this embodiment can reduce the probability that the motor starts due to the user accidentally triggering the power-on switch, and improves the safety of use when the push handle component 20 is folded.
  • the trigger holding time of the power-on switch 11 is different under the first control logic and the second control logic, so that under the second control logic, the probability of incorrect starting of the motor is smaller.
  • the first control logic at least includes: when the control circuit enters the activation state, the allowed triggering time of the first operating element 62 is configured within the first preset time.
  • the second control logic at least includes: when the control circuit enters the activation state, the allowed triggering time of the first operating element 62 is configured within the second preset time.
  • the second control logic includes: the allowed triggering time of the first operating element 62 is configured as a fixed time point at a preset time interval from the control circuit entering the activation state, and the control circuit is allowed to receive the motor start signal at the fixed time point to control The current of the power supply 13 flows to the motor 13, causing the motor 13 to drive the working part 31 to operate.
  • the operator first triggers the power-on switch 11 to make the control circuit enter the activation state. From the moment the control circuit enters the active state, the timing unit 16 starts timing, and at the same time the main control unit 14 is allowed to respond to the motor start signal. When the timing time of the timing unit 16 reaches the first preset time, the timing unit 16 sends a signal to the main control unit 14. After receiving the timing signal, the main control unit 14 no longer responds to the motor start signal.
  • the operator When the pusher component 20 is in the non-working position, the operator first triggers the power-on switch 11 to make the control circuit enter the activation state. From the moment the control circuit enters the active state, the timing unit 16 starts timing, and at the same time the main control unit 14 is allowed to respond to the motor start signal. When the timing time of the timing unit 16 reaches the second preset time, the timing unit 16 sends a signal to the main control unit 14. After receiving the timing signal, the main control unit 14 no longer responds to the motor start signal.
  • the operator first triggers the power-on switch 11 to enter the activation state of the control circuit. From the moment the control circuit enters the active state, the timing unit 16 starts timing. When the timing time reaches a preset fixed time point, the timing unit 16 sends a signal to the main control unit 14, and the main control unit 14 is allowed to respond to the motor start signal at this fixed time point. When the timing time does not reach this time point or the timing time exceeds this At this point in time, the main control unit 14 does not respond to the motor start signal, that is, the main control unit 14 cannot receive the motor start signal, or even if it receives the motor start signal, it does not control the motor 13 to start.
  • the second preset time is smaller than the first preset time.
  • the second preset time is less than or equal to one fifth, one tenth or one hundredth of the first preset time.
  • the second preset time may be one-fifth or one-tenth of the first preset time.
  • the first preset time is greater than or equal to 30s.
  • the first preset time may be 30s, 40s, 50s or 60s, etc.
  • the second preset time may be 0s, 0.2s, 0.3s, 0.5s, 1s, 2s, 3s, 4s or 5s, etc. If the second preset time is greater than 5 seconds, the probability of the user accidentally triggering the generator drive switch will be increased.
  • the preset fixed time point can be the 0.5s, 1st, 5th, 10th, etc. since the control circuit enters the activation state.
  • the user when the pusher component 20 is in the working position area, the user triggers the power-on switch 11 to make the control circuit enter the activation state, and then triggers the first operating element 62 within 60 seconds. Power on the motor 13 and start working.
  • the pusher component 20 When the pusher component 20 is in the non-working position, the user triggers the power-on switch 11 to cause the control circuit to enter the activation state, triggering the first operating element 62 within 0.3s, or triggering the first operating element 62 in the 3s since the control circuit enters the activation state.
  • An operating component 62 is required to start the motor 13.
  • the user has enough time to trigger the first operating element 62, which can ensure that the user can start the motor when he wants to.
  • the pusher component 20 is in the non-working position, it is almost necessary for the user to trigger the power-on switch 11 and the first operating element 62 at the same time to start the motor, or it is necessary to time the time after triggering the power-on switch 11.
  • the motor can be started only by triggering the first operating element 62 after reaching a fixed time point.
  • the user triggers the power-on switch 11 and the first operating element 62 successively at a normal speed to control the start of the motor 13. Therefore, it is difficult for the user to think of the need to trigger the power-on at the same time. Only the switch 11 and the first operating element 62 can start the motor, thereby greatly reducing the probability of incorrect starting of the motor.
  • the first control logic at least includes: the trigger holding time of the power-on switch 11 reaches the first holding time, allowing the control circuit to enter the activation state; when the control circuit enters the activation state, allowing reception within the first preset time Motor start signal.
  • the second control logic at least includes: the trigger holding time of the power-on switch 11 reaches the second holding time, allowing the control circuit to enter the activation state, and when the control circuit enters the activation state, the motor start signal is allowed to be received within the second preset time.
  • the second holding time is greater than the first holding time
  • the second preset time is less than the first preset time.
  • the second startup logic includes: the trigger holding time of the power-on switch 11 reaches the second holding time, allowing the control circuit to enter the activation state. From the time the control circuit enters the activation state, at a fixed time point separated by a preset time, the control circuit Allows receiving motor start signal.
  • the switch control unit 111 detects the moment when the power-on switch 11 is triggered, and controls the timing unit 16 to start timing.
  • the switch control unit 111 sends a timing signal to the main control unit 14.
  • the control circuit enters the activation state, and the main control unit 14 is allowed to respond to the motor start signal.
  • the switch control unit 111 controls the timing unit 16 to start timing again.
  • the timing unit 16 sends a signal to the main control unit 14, After receiving the timing signal, the main control unit 14 no longer responds to the motor start signal.
  • the operator When the pusher component 20 is in the non-working position, the operator first triggers the power-on switch 11.
  • the switch control unit 111 detects the moment when the power-on switch 11 is triggered and controls the timing unit 16 to start timing.
  • the switch control unit 111 sends a timing signal to the main control unit 14 .
  • the control circuit enters the active state, and the main control unit 14 is allowed to respond to the motor start signal. From the time when the timing time reaches the preset second holding time, the switch control unit 111 controls the timing unit 16 to start timing again.
  • the timing unit 16 When the timing time of the timing unit 16 reaches the second preset time, the timing unit 16 sends a signal to the main control unit 14, After receiving the timing signal, the main control unit 14 no longer responds to the motor start signal. Alternatively, after the timing time reaches the preset second holding time, the switch control unit 111 controls the timing unit 16 to start timing again. When the timing time reaches a preset fixed time point, the timing unit 16 sends a signal to the main control unit 14, and the main control unit 14 is allowed to respond to the motor start signal at the fixed time point.
  • the second holding time is greater than or equal to 3 times the first holding time; the second preset time is less than the first preset time. Specifically, the second holding time is greater than or equal to 2s, and the first holding time is less than or equal to 0.6s.
  • the second preset time is greater than or equal to 0s, less than or equal to 5s, and the first preset time is greater than or equal to 30s.
  • the first holding time may be 0s, 0.1s, 0.3s, 0.5s or 0.6s, etc.
  • the second holding time may be 2s, 5s, 10s, 15s, 20s or 30s, etc.
  • the first preset time can be 30s, 40s, 50s or 60s, etc.
  • the second preset time may be 0s, 0.2s, 0.3s, 0.5s, 1s, 2s, 3s, 4s or 5s, etc.
  • the preset fixed time point may be the 0.5s, 1st, 5th, 10th, 20th, etc. since the second holding time is reached.
  • the pusher component 20 when the pusher component 20 is in the working position area, the user only needs to trigger the power-on switch for 0.3 seconds and then trigger the motor start switch within 60 seconds to control the motor start.
  • the pusher component 20 When the pusher component 20 is in the working position, the user needs to continuously press or rotate the power switch for 30 seconds to activate the control circuit, and then trigger the first operating element within 0.3 seconds of activation of the control circuit. Only when the first operating element 62 is triggered in the third s since the control circuit enters the activation state can the motor 13 start working. For the user, it is a small probability event to continuously trigger the power-on switch 11 and hold it for a period of time without letting go.
  • the first operating element 62 will be triggered in a very short time. The probability is lower, so this example can effectively reduce the probability that the user mistakenly triggers the power-on switch 11 and the first operating element 62 to start the motor 13, and improves the operational safety when folding the push handle component 20.
  • this example changes both the trigger holding time of the power-on switch 11 and the allowed trigger of the first operating element 62 when the push rod is in the non-working position area. time, the difficulty of starting the motor 13 can be further improved, the probability of the user accidentally starting the motor 13 during the folding process of the pusher component 20 is reduced, and the safety performance is improved.
  • the electric tool 100 includes a push lawn mower, the motor of the push lawn mower includes a cutting motor, the working part includes a cutting part, and the cutting motor is used to drive the cutting part to move to perform cutting work.
  • the first operating element 62 may be a cutting pull rod 621 , which is parallel to the push rod 21 of the push handle component 20 and is used for the user to pull.
  • the display unit 17 lights up, thereby prompting the user that the cutting pull rod can be operated.
  • the cutting pull rod is pulled close to the push rod 21 within the allowed triggering time, the cutting motor starts to drive the cutting part to work.
  • the motor 13 of the electric tool includes a self-driven motor
  • the working part 31 includes a moving component
  • the moving component is used to drive the host 10 to move within a set path or working area.
  • the first operating element 62 may be a self-driven pull rod 622 .
  • the self-driven pull rod 622 is disposed at the push rod 21 and is parallel to the push rod 21 and the cutting pull rod 621 .
  • the self-driving pull rod 622 and the cutting pull rod 621 can be respectively located on both sides of the push rod 21 to facilitate user operation.
  • the user When the user needs to control the start of the self-driven motor, he can first trigger the power-on switch 11 provided on the switch control unit 111, and continue to trigger for a preset trigger holding time, so that the control circuit enters the activation state.
  • the display unit 17 lights up, thereby prompting the user that the self-driving pull rod 622 can be operated.
  • the self-driven pull rod is pulled close to the push rod 21 within the allowed triggering time, the self-driven motor starts to drive the moving component to work.
  • the first control logic and the second control logic described in the first, second and third examples above may limit the trigger holding time of the power-on switch 11 and the allowed triggering time of the first operating element 62 .
  • the user when it is necessary to start the cutting motor or the self-driven motor, the user performs two switch triggering actions (triggering the power-on switch + triggering the first operating element) to start the motor.
  • the power tool is a push lawn mower
  • the lawn mower when the lawn mower is supplied for commercial use, for example, a gardening team carries the lawnmower to mow multiple gardens, because the gardening team needs to move from one garden to another. Another company works in a garden. The lawn mower needs to be loaded and transported with the garden team. Therefore, there are many transportation conditions, and there are also many storage conditions for the pusher component 20. Therefore, the probability of the motor starting by mistake is greater. Double trigger action starts the motor. It is difficult to meet the safety requirements for motor starting under commercial operating conditions.
  • the motor start switch 15 further includes an unlocking element 61 .
  • the unlocking element 61 is used to control the first operating element 62 to switch between a locked state and an unlocked state.
  • the first operating element 62 cannot respond to the user's operation and output the motor start signal.
  • the first operating element 62 is in the unlocked state, the first operating element 62 can respond to the user's operation and output the first operating motor start signal. .
  • the unlocking element 61 is configured as a mechanical operator.
  • the mechanical operating member includes a stop operably coupled to the first operating element 62 .
  • the stopper abuts the first operating element 62 so that the first operating element 62 cannot be operated to move toward the push rod 21 and thus cannot output the motor start signal.
  • the first operating element 62 is locked.
  • the stopper releases the first operating element 62 so that the first operating element 62 can be operated to move toward the push rod 21.
  • the first operating element 62 is in an unlocked state.
  • the first operating element 62 When 62 is close to the push rod 21, the first operating element 62 can output a motor start signal.
  • the user when the motor needs to be started, the user needs to perform three triggering actions, that is, first trigger the power-on switch 11 to make the control circuit enter the activation state; and then trigger the unlocking component 61 and the first triggering component within the allowed triggering time. Operate element 62 to start the motor.
  • the trigger holding time of the power-on switch 11 and the allowed triggering time of the first operating element 62 are limited, All can be applied to this embodiment. That is, under the first control logic, after the control circuit enters the activation state, the user needs to operate the unlocking element 61 and the first operating element 62 within the first preset time to control the starting of the motor. Under the second control logic, after the control circuit enters the activation state, the user needs to operate the unlocking element 61 and the first operating element 62 within the second preset time to control the motor to start.
  • the second preset time is less than the first preset time, and the second preset time is smaller is equal to 5 seconds, so under the second control logic, it is difficult for the user to operate two components in a short time, thereby increasing the difficulty of starting the power tool under the second control logic.
  • the unlocking element 61 is configured as an electronic switch capable of outputting an unlocking signal in response to user operation.
  • the control circuit is allowed to receive the motor start signal only after receiving the unlocking signal. That is, in this example, when it is necessary to control the motor to start, the user needs to trigger the power-on switch 11 first to make the control circuit enter the activation state. Then the unlocking element 61 is triggered. After the control circuit receives the unlocking signal, the user triggers the first operating element 62 to control the motor to start.
  • the trigger holding time of the power-on switch 11 and the allowed triggering time of the first operating element 62 are limited, All can be applied to this embodiment.
  • the unlocking element 61 is a mechanical operating component in the previous embodiment, which will not be described again here.
  • the continuous triggering time of the unlocking element 61 can also be differentially limited under the first control logic and the second control logic to further increase the difficulty of motor starting under the second control logic.
  • the first control logic at least includes: when the control circuit enters the activation state, the unlocking element 61 is triggered until the continuous triggering time of outputting the unlocking signal to the control circuit reaches the third holding time, and the control circuit allows the receiving motor to start. signal to control the current flow of the power supply to the motor according to the motor start signal, so that the motor drive working part works. That is, when the timing time does not reach the third holding time, the control circuit does not respond to the motor start signal, that is, it cannot receive the motor start signal, or even if it receives the motor start signal, it does not control the motor start.
  • the second control logic at least includes: when the control circuit enters the activation state, the unlocking element 61 starts from being triggered until the continuous triggering time of outputting the unlocking signal to the control circuit reaches the fourth holding time, and the control circuit is allowed to receive the motor start signal to start according to the motor.
  • the signal controls the flow of current from the power supply to the motor so that the motor drive unit operates.
  • the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times of the third holding time.
  • the unlocking element 61 can be provided on the switch control unit 111 .
  • the unlocking element 61 can be a push-button switch. When the push-button switch is pressed, an unlocking signal can be output to the main control unit 14 .
  • the main control unit 14 receives the unlocking signal and is allowed to respond to the motor start signal to control the motor start.
  • the main control unit 14 does not receive the unlocking signal and is prohibited from responding to the motor start signal. At this time, even if the user operates the first operating element 61, the motor cannot be started.
  • the switch control unit 111 detects the moment when the unlocking element 61 is triggered, controls the timing unit 16 to start timing, and continues timing while the unlocking element 61 remains in the triggering state, until the timing time reaches During the preset third holding time, the switch control unit 111 sends an unlocking signal to the main control unit 14 so that the main control unit 14 is allowed to receive the motor start signal.
  • the main control unit 14 receives the motor start signal, it controls the motor to start.
  • the pusher component 20 When the pusher component 20 is in the non-working position, if you want to control the motor to start, you need to trigger the power-on switch 11 first to make the control circuit enter the activation state. Then the unlocking element 61 is triggered, and the unlocking element 61 is continuously pressed.
  • the switch control unit 111 detects the moment when the unlocking element 61 is triggered, controls the timing unit 16 to start timing, and continues timing while the unlocking element 61 remains in the triggering state, until the timing time reaches During the preset fourth holding time, the switch control unit 111 sends an unlocking signal to the main control unit 14 so that the main control unit 14 is allowed to receive the motor start signal. When the main control unit 14 receives the motor start signal, it can control the motor to start.
  • the fourth holding time is greater than or equal to three times of the third holding time.
  • the fourth holding time may be 3 times, 5 times, 20 times, 50 times or 100 times the third holding time. The larger the fourth holding time is, the longer the unlocking element 61 needs to be continuously triggered, and the lower the probability of the user triggering it by mistake.
  • the fourth holding time is greater than or equal to 2s, and the third holding time is less than or equal to 0.6s.
  • the third holding time may be 0s, 0.1s, 0.3s, 0.5s or 0.6s, etc.
  • the fourth holding time may be 2s, 5s, 10s, 15s, 20s or 30s, etc. Since the fourth holding time is much longer than the third holding time, when the push handle component 20 is in the non-working position area, the user needs to continue to trigger the unlocking element 61 for a period of time. For the user, usually the motor can be started by briefly pressing three switches, so the user does not expect to continue to press the unlocking element 61 after pressing the power-on switch 11 .
  • the solution provided by this embodiment can reduce the probability that the user accidentally triggers the power-on switch and the motor start switch to cause the motor to start, and improves the safety of use when the push handle component 20 is folded.
  • the trigger holding time of the unlocking element 61 may not be limited, but the allowed triggering time of the unlocking element 61 may be limited to increase the difficulty of starting the motor.
  • the first control logic can be combined with the previous The same as the fourth example, the second control logic at least includes: a preset fixed time interval between the control circuit entering the activation state and the control circuit receiving the unlocking signal. That is to say, the timing starting point when the control circuit is allowed to receive the unlocking signal is when the control circuit enters the activation state. When the timing time reaches a preset fixed time point, the control circuit is allowed to receive the unlocking signal at the fixed time point, and after receiving the unlocking signal After that, it is allowed to receive the motor start signal.
  • the preset fixed time point can be 5s, 10s, 15s or 20s, etc.
  • the preset fixed time point is the interval from when the control circuit enters the activation state, and the interval is 5s, 10s, 15s from the time the control circuit enters the activation state. Or 20s. That is to say, the control circuit is allowed to receive the unlocking signal at the 5th, 10th, 15th or 20s from entering the activation state.
  • Unlock signal that is, cannot receive the unlock signal, or does not perform any action even if it receives the unlock signal.
  • This embodiment does not limit the allowable triggering time of the unlocking element 61 and the first operating element 62 under the first control logic.
  • the user only needs to trigger the unlocking element 61 and the first operating element 62 sequentially after triggering the main power-on switch 11 to control The motor starts.
  • Under the second control logic by limiting the unlocking signal to be received at a fixed time, the difficulty of starting the motor can be increased, thereby improving the safety of the electric tool when the pusher component 20 is in the stowed state.
  • the allowed triggering time of the first operating element 62 can be further limited to further improve the difficulty of starting the motor under the second control logic.
  • the first control logic further includes: the control circuit allows receiving the motor start signal within a first preset time.
  • the timing starting point of the first preset time is when the continuous triggering time of the unlocking element 61 reaches the third holding time.
  • the second control logic also includes: the control circuit allows receiving the motor start signal within a second preset time, wherein the timing starting point of the second preset time is when the continuous triggering time of the unlocking element 61 reaches the fourth holding time.
  • the set time is smaller than the first preset time.
  • the second control logic includes: the control circuit allows receiving the motor start signal at fixed time points spaced by a preset time since receiving the unlock signal.
  • the second preset time is less than or equal to one fifth, one tenth or one hundredth of the first preset time.
  • the second preset time may be one-fifth or one-tenth of the first preset time.
  • the first preset time is greater than or equal to 30s
  • the second preset time is greater than or equal to 0s and less than or equal to 5s.
  • the first preset time may be 30s, 40s, 50s or 60s, etc.
  • the second preset time may be 0s, 0.1s, 0.2s, 0.3s, 0.4s or 0.5s. If the second preset time is greater than 5 seconds, the probability of the user accidentally triggering the first operating element will be increased.
  • the preset fixed time points may be the 0.5s, 5th, 10th, 15th, 20th, etc. from the time when the timing time reaches the fourth holding time.
  • This embodiment can not only extend the trigger holding time of the unlocking element 61 under the second control logic, but also shorten the allowed triggering time of the first operating element 62, that is, when the pusher component 20 is in the non-working position area, the user needs to trigger the main The switch 11 is powered on, and then the unlocking element 61 is continuously triggered and held for a certain period of time. Only when the first operating element 62 is triggered at the moment when the continuous triggering time is reached or at a fixed time point after the continuous triggering time is reached, can the motor start be controlled. Compared with the above In one embodiment, the motor starting logic provided in this embodiment reduces the probability of erroneous starting of the motor, which can further improve the safety of the power tool.
  • this embodiment can also set the trigger holding time of the power-on switch 11 to be different under the first control logic and under the second control logic, so as to further increase the probability of incorrect starting of the motor under the second control logic. That is a combination of the sixth example and the first example.
  • the control circuit under the first control logic, when the trigger holding time of the power-on switch 11 reaches the first holding time, the control circuit is allowed to receive the unlocking signal, and when receiving the unlocking signal, the control circuit determines whether the time for the unlocking element 61 to maintain the triggering state is reached.
  • the third holding time allows the motor start signal to be received within the first preset time when the third holding time is reached, and the control circuit controls the motor to start when receiving the motor start signal.
  • the first holding time, the third holding time and the first preset time are the same as the previous embodiment, and will not be described again here.
  • the control circuit determines whether the time the unlocking element 61 maintains the triggering state reaches the fourth holding time.
  • the holding time allows the motor start signal to be received within the second preset time when the fourth holding time is reached, or the control circuit allows the motor start signal to be received at a fixed time point separated by the preset time since the fourth holding time is reached.
  • the signal controls the motor to start.
  • the second holding time is greater than the first holding time
  • the fourth holding time is greater than the third holding time
  • the second preset time is less than the first preset time.
  • the second holding time, the fourth holding time and the second preset time are the same as the previous embodiment, and will not be described again.
  • the unlocking element 61 by limiting the trigger holding time of the power-on switch 11 under the first control logic and the second control logic, the unlocking element 61
  • the continuous triggering time and the allowed triggering time of the first operating element 62 are different, which greatly reduces the probability that the user mistakenly operates the switch component to start the motor when the pusher component 20 is in the non-working position area.
  • the user can start the motor by briefly pressing three switches, so the user does not expect to need to trigger the power-on switch 11 and the unlocking element 61 for a long time.
  • the probability of maintaining the triggering state for a certain period of time during the first triggering action (power-on switch 11) and the second triggering action (unlocking element 61) is even smaller.
  • the probability of triggering the first operating element within a short period of time or at a fixed time point after the end of the second triggering action is even smaller, which is almost impossible to achieve without consciousness. Therefore, the solution provided by this embodiment can improve the performance of the pusher component 20
  • the difficulty of false triggering of the switch component in the stowed state effectively reduces the probability of false starting of the motor.
  • the electric tools provided in the above embodiments all include a power-on switch 11.
  • the power-on switch 11 is used to make the control circuit enter the activation state when triggered.
  • the control circuit is allowed to receive the motor start signal.
  • the power tool may not be provided with a power-on switch 11 , and the control circuit may enter the activation state when the power tool is connected to the power source 12 .
  • the control circuit enters the activation state in response to the access of the battery pack.
  • the power supply loop from the power supply 12 to the main control unit 14 is turned on, and the main control unit 14 is powered on, allowing the motor to be received.
  • Start signal In order to improve the safety of the electric tool and reduce the probability of false starting of the motor, the motor start switch includes an unlocking element 61 and a first operating element 62.
  • the unlocking element 61 is used to output an unlocking signal in response to the user's operation, and the first operating element 62 is used to respond to the user's operation.
  • the operation outputs a motor start signal, and when the main control unit 14 receives the unlocking signal and the motor start signal, it controls the motor to start.
  • control logic can be used to increase the difficulty of starting the motor when the pusher component 20 is in the non-working position.
  • the first control logic includes: when the control circuit enters the activation state, the unlocking element 61 starts from being triggered until the continuous triggering time of outputting the unlocking signal to the control circuit reaches the third holding time, and the control circuit allows receiving the motor start signal. , and controls the current flow of the power supply to the motor according to the received motor start signal, so that the motor driving part works.
  • the second control logic includes: when the control circuit enters the activated state, the unlocking element 61 starts from being triggered until the continuous triggering time of outputting the unlocking signal to the control circuit reaches the fourth holding time.
  • the control circuit allows the motor start signal to be received, and according to the received
  • the motor start signal controls the current flow of the power supply to the motor so that the motor driving unit operates.
  • the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to three times of the third holding time.
  • the allowed triggering time of the first operating element 62 can also be further limited to further improve the difficulty of starting the motor under the second control logic.
  • the first control logic further includes: the control circuit allows receiving the motor start signal within a first preset time.
  • the timing starting point of the first preset time is when the trigger holding time of the unlocking element 61 reaches the third holding time.
  • the second control logic also includes: the control circuit allows receiving the motor start signal within a second preset time.
  • the timing starting point of the second preset time is when the trigger holding time of the unlocking element 61 reaches the fourth holding time, and the second preset time is less than the first preset time.
  • the second control logic includes: the control circuit allows the motor start signal to be received at fixed time points separated by a preset time since the fourth holding time is reached.
  • the electric tool is a push lawn mower.
  • the push lawn mower may include both a cutting motor and a self-driven motor.
  • the first control logic and the second control logic provided in the above embodiment may be applied to control the starting of the cutting motor. Or control the starting of self-driven motor.
  • the above-mentioned power-on switch 11 and unlocking element 61 may both be push-button switches.
  • Push-button switches can be either normally open switches or normally closed switches. For a normally open switch, the switch closes when triggered and opens when released; or for a normally closed switch, the switch opens when triggered and closes when released. Therefore, the control circuit will generate a level jump in response to the triggering action of the switch. When the switch is continuously triggered, the level remains unchanged, and when the switch is released, the level jump occurs again. Furthermore, the main control unit 14 can start timing at the starting moment of the level transition, and keep timing when the level does not change, so as to determine whether the time the switch maintains the trigger state reaches the preset holding time.
  • the motor starting control scheme provided by the above embodiment uses the second control logic when the pusher component 20 is in the non-working position. Although under the second control logic, it is very difficult for the user to operate the switch assembly to start the motor, there are also A certain startup probability. If the motor is started by mistake, there is still a safety risk.
  • the motor when the control circuit receives the first status signal, the motor is allowed to start working at least at the first speed, and when the control circuit receives the second status signal, the motor is allowed to start working at least at the second speed.
  • the second speed is less than or equal to one-third of the first speed.
  • the first speed here should be understood as the speed of the motor under normal operation of the power tool.
  • the second rotational speed is less than or equal to one-fifth of the first rotational speed.
  • the second rotational speed may be one-third, one-fourth, one-fifth or one-tenth of the first rotational speed.
  • the first rotational speed may be above 2500r/min, such as 2500r/min, 3000r/min, 3500r/min or 4000r/min
  • the second rotational speed may be below 700r/min, such as 700r/min, 600r/min, 300r /min or 200r/min. Since the second rotational speed is much smaller than the first rotational speed, even if the motor drives the working part (such as the blade and the moving assembly) to work, it will not cause much harm to the user.
  • control circuit when the control circuit receives the second status signal, the control circuit is also configured to control the motor 13 to turn off after the motor 13 is started for a preset time. Therefore, even if the user causes the motor 13 to start due to misoperation during the process of folding the push rod, the control circuit can control the motor 13 to turn off after a preset time to prevent damage to the user.
  • the preset time is less than or equal to 5 seconds.
  • the preset time may be 2s, 4s or 5s.
  • the preset time exceeds 5 seconds, the number of motor rotations is too high, which may cause safety hazards.
  • the electric tool provided by this application has an adjustment component 50 , which includes an adapter 51 and an adjustment component 52 .
  • the adapter 51 and the adjustment component 52 cooperate to achieve position adjustment between the pusher component 20 and the host 10 .
  • There are many ways to implement the adjustment component and two implementation ways are taken as examples for description below.
  • the adjustment component 50 includes an adapter 51 and an adjustment component 52.
  • the adapter 51 is connected to the host 10
  • the adjustment component 52 is connected to the pusher component 20, and the adapter 51 cooperates with the adjustment component 52.
  • the push-hand part 20 can be locked to the main machine 10 , the adapter 51 and the adjusting part 52 are released, and the push-hand part 20 can rotate around the main machine 10 .
  • the adapter 51 has a first position 511 , and the adjusting member 52 is provided with a matching portion 521 .
  • the fitting portion 521 is coupled to the first position 511, the pusher component 20 is in the working position.
  • the fitting portion 521 leaves the first position, the push handle component 20 is in the non-working position area.
  • the adjusting component 50 also includes an operating component 53 that drives the adjusting member 52 to engage with or unmating the adapter 51 .
  • the operating component 53 can move along the axis 514 of the adapter 51 to the unlocking area 516 .
  • the push handle component 20 is locked in the first position 511 and cannot be adjusted.
  • the adjusting member 52 is uncoupled from the adapter 51.
  • the adjustment member 52 is in an active state relative to the adapter 51, and the pusher component 20 can be adjusted accordingly, such as rotating Adjustment etc.
  • the unlocking area 516 refers to a planar area with a certain distance from the surface of the adapter 51 in the direction of the axis 514 . Of course, it can also be understood as a planar area that is substantially parallel to the surface of the adapter 51 . Since the unlocking area 516 is a flat area, the adjusting member 52 can move from the first position 511 along the direction of the axis 514 to the unlocking area 516; it can also move from other positions of the adapter 51 to the unlocking area along the direction of the axis 514. 516 on. In addition, the distance between the unlocking area 516 and the surface of the adapter 51 can be determined according to the performance of the signal unit 40 .
  • the distance between the unlocking area 516 and the adapter seat 51 along the axis 514 is 4 mm.
  • the user needs to rotate the pusher component 20 from the working position area (first position) to the non-working position area, the user needs to first pull the operating component 53 to translate the pusher component 20 from the first position 511 to the unlocking area 516, and then rotate it. Push the hand part 20 to rotate to the non-working position.
  • the fitting part 521 is directly connected to the first position 511, that is, the first position 511 has a matching 2.
  • the mating portion 521 is located at the first position 511, other positions on the adjusting member 52 are mated with other positions on the base 51.
  • the first position 511 is designed as a blank area or a groove structure. Several teeth are provided around the blank area or the groove structure; at the same time, corresponding teeth are provided around the matching portion 521 for meshing and the like. Regardless of the first method or the second method, it only needs to be satisfied that the push handle component 20 cannot be adjusted after the adjusting member 52 and the adapter 51 are mated.
  • the matching method between the fitting portion 521 and the first position 511 is the second one, taking a number of teeth being provided around the first position 511 as an example, there are various distributions of the teeth and the first position 511 on the adapter 51.
  • the teeth and the first position 511 are distributed around the periphery of the axis 514; or several teeth are spaced around the axis 514 to form an annular structure, and the first position 511 is located within the annular structure, etc.
  • Figure 7 shows the structure of the adapter 51
  • Figure 8 shows the structure of the adjustment component 52.
  • the adapter 51 is provided with There is a guide shaft 518 having an axis 514.
  • the adjusting member 52 is provided with a sliding The moving sleeve is located at the sleeve 523 outside the guide shaft 518.
  • the first position 511 includes at least two gear areas 51a. All gear zones 51a are distributed around axis 514.
  • the fitting portion 521 is coupled to any gear area 51a, the push handle component 20 is in the working position area, and the signal unit 40 feeds back the first status signal to the main control unit 14.
  • the adjustment between the gear areas 51 a and the gear areas 51 a can be as follows: first, using the operating component 53 to disengage the mating portion 521 from one of the gear areas 51 a and move it along the axis 514 to On the unlocking area 516, the adjusting member 52 is in an active state at this time; rotate the adjusting member 52 so that the fitting portion 521 is aligned with the other gear area 51a; then, use the operating component 53 to drive the fitting portion 521 to engage with the gear area 51a. , to complete the adjustment between gear areas 51a.
  • the adapter 51 further has a second position 512 spaced apart from the first position 511 around the axis 514 .
  • the push handle component 20 is located in the non-working position area, and at this time, the push handle component 20 is in a fully stored state.
  • the adapter 51 is provided with a resisting portion 513 .
  • the resisting portion 513 is located between the first position 511 and the second position 512.
  • the fitting portion 521 contacts the resisting portion 513 along the axis 514 direction, the adjusting member 52 and the adapter 51 are unmated.
  • the resisting portion 513 collides with the mating portion 521, it can prevent the adjusting member 52 from mating with the adapter 51.
  • the resisting portion 513 can be high in the direction of the axis 514. In the first position 511, when the fitting part 521 is against the resistance part 513, other parts of the adjustment member 52 cannot contact the base 51; or the resistance part 513 is designed to have a tooth-like structure, and the fitting part 521 is designed not to have The raised structure of the teeth, etc.
  • the adapter 51 also has a third position 517 spaced apart from the first position 511 around the axis 514 .
  • the push handle component 20 is in a non-working position.
  • the push handle component 20 is in an intermediate storage state and is substantially perpendicular to the plane where the power tool 100 is located.
  • the control unit receives the second status signal and activates the second control logic.
  • the pusher part 20 when the power tool 100 is transported from place to place, if the pusher part 20 is in a fully stored state, for example, if the pusher part 20 is folded on the host 10 and is approximately parallel to the plane where the power tool 100 is located, the power tool will increase the number of The overall length is 100mm, taking up transportation space.
  • the push handle part 20 is set in an intermediate storage state, which is roughly perpendicular to the plane where the power tool 100 is located.
  • the angle between the push handle part 20 and the plane where the power tool 100 is located is 70° to 110°, etc., which can reduce the overall length of the power tool 100. , to facilitate transportation during transition and improve transition efficiency.
  • the operating component 53 includes a guide member 531 connected to the upper axis 514 of the adapter 51 , an operating member 533 that drives the guide member 531 to move in the direction of the axis 514 , and an elastic member 533 .
  • the adjusting member 52 is sleeved on the guide member 531 and is located between the adapter member 51 and the operating member 533 .
  • the operating member 533 is switched to the locked state, it can drive the adjusting member 52 to be mated with the base 51.
  • the elastic member 534 drives the adjusting member 52 to be unmated with the adapter 51 and move to the unlocking area. 516.
  • the adjusting member 52 when the operating member 533 is switched to the locking state, the adjusting member 52 is driven to compress the adjusting member 52 along the direction of the axis 514 so that it is mated with the adapter 51; when the operating member 533 is switched to the unlocking state, When the adjusting member 52 loses the driving force of the operating member 533, it will move reversely along the direction of the axis 514 to the unlocking area 516 under the elastic force of the elastic member 534, and will be unmated with the adapter 51.
  • the elastic member 534 may be a spring, elastic rubber, elastic metal sheet, etc.
  • the operating member 533 includes a cam portion 53b rotatably connected to the guide member 531 and a rotating portion 53a connected to the cam portion 53b.
  • the circumferential side of the cam portion 53b is in contact with the adjusting member 52.
  • the side of the adapter 51 facing the adjustment member 52 is provided with first adapter portions 515 spaced around the axis 514 , and the adjustment member 52 is provided with first adapter portions 515 Engaged second mating portion 522 .
  • the first mating part 515 and the second mating part 522 can have various structural designs.
  • the first mating part 515 is designed as a groove-shaped structure
  • the second mating part 522 is designed as a convex shape to match it. structure etc.
  • both the first mating part 515 and the second mating part 522 may be tooth-like structures.
  • the adjusting component 50 adopts a grindstone structure.
  • the structure of the adjusting component 50 is not limited to this, and other components may also be used.
  • the adjusting component 50 includes an adapter 54 connected to the host 10 and an adjusting component 55 connected to the pusher component 20 .
  • the adjuster 55 is used to adjust the pusher component. 20 as a whole is rotated relative to the host 10 or the push handle component 20 is locked on the adapter 54 so that the push handle component 20 as a whole is fixed relative to the host 10 .
  • the adjusting member 55 includes an adjusting handle 551 and a pin 552 connected to the adjusting handle 551 .
  • the adapter 54 is a base connected to the host 10. At least one of the pusher component 20 and the adapter 54 is provided with a positioning portion 56.
  • the adjustment handle 551 is used to drive the pin 552 to move along the length direction of the pin 552, so that the The pin is coupled to or disengaged from the positioning portion 56 .
  • the push handle component 20 is fixed relative to the base 54 .
  • the push handle component 20 can rotate relative to the base 54 so that the user can fold the push handle component 20 .
  • the positioning part 56 can be disposed on the base 54
  • the adjusting member 55 can be disposed on the push rods 21 on both sides of the main body 10 .
  • the push rod 21 includes a pin hole passing through the push rod 21 , and the pin shaft 552 of the adjusting member 55 cooperates with the pin hole, so that the adjusting member 55 is coupled to the push rod 21 .
  • the pin shaft 552 partially extends out of the pin hole to mate with the positioning portion 56 on the base 54 . When the pin shaft 552 is disengaged from the positioning portion 56 and is completely retracted into the pin hole, the push rod 21 can rotate around the host 10 .
  • the positioning part 56 may be a positioning hole, and there may be multiple positioning holes, which may be distributed in the working position area and the non-working position area, so that the pusher component 20 is positioned to certain positions in the working position area or the non-working position area.
  • the positioning holes may include working area positioning holes 561 and non-working area positioning holes 562/563.
  • the multiple working area positioning holes 561 there can be multiple working area positioning holes 561, and the multiple working area positioning holes 561 are arranged along the rotation arc of the push rod 21, so that the push rod 21 can be positioned in multiple different gears, so that the push rod can adapt to different conditions. Height of the user.
  • the positioning hole 562 is used to position the push rod as shown in Figure 12 In the intermediate stowed state, the positioning hole 563 is used to position the push rod in the fully stowed state as shown in Figure 13.
  • multiple positioning holes can also be provided between the positioning holes 562 and the positioning holes 563 along the rotation arc of the push rod 21 so that the push rod 21 can be positioned at multiple positions in the non-working position area.
  • the push handle component 20 does not need to be fixed in the non-working position area, that is, the positioning holes are only provided in the working position area.
  • the positioning part 56 can also be provided on the main unit 10 and the push rod 21 , that is, the push rod 21 is provided with a pin hole, and the base 54 is provided with a plurality of positioning holes.
  • the push rod 21 rotates until the pin hole is coaxial with one of the positioning holes on the base 54 , the adjusting member 55 is detachably engaged in the positioning hole and the pin hole to position the push rod 21 to the base 54 .
  • the following describes the configuration form of the signal unit 40 provided by the present application to feedback different status signals according to the position of the pusher component 20 .
  • the signal unit 40 may be a mechanical trigger switch. As shown in Figures 11 to 13, the signal unit 40 is configured as a micro switch 43.
  • the micro switch 43 is used to be triggered or released in response to changes in the position of the push rod 22 when the push rod 22 rotates, so as to output different status signals.
  • the push rod 22 is connected to the base, and the micro switch 43 is provided on the base 54 so as to respond sensitively to the rotation of the push rod 22 .
  • the micro switch 43 includes a trigger part and a switch part, and the switch part is controlled by the trigger part to switch between the off state and the on state. Wherein, when the micro switch is in the off state or the on state, the signal unit 40 selectively feeds back the first state signal or the second state signal.
  • the switch part is connected to the main control unit 14.
  • the main control unit 14 can detect the level jump of the circuit due to the change in the on-off state of the switch part.
  • the switch part is in the on state and the off state, the electrical signals fed back by the circuit are different.
  • the micro switch is a normally open switch
  • the trigger part is triggered, the switch part switches from the off state to the on state, and the main control unit 14 can detect the voltage signal jumping from high level to low level
  • the trigger part is released, the switch part is switched from the on state to the off state
  • the main control unit 14 can detect the voltage signal jumping from low level is high level.
  • the micro switch can also be a normally closed switch. Therefore, by detecting the level transition of the circuit, the main control unit 14 can determine whether the current trigger part is triggered, and then determine the position of the push rod, thereby executing different motor starting logics.
  • the micro switch 43 is a normally open switch and is disposed in the non-working position area of the rotation area of the pusher component 20 . More specifically, the micro switch 43 sets the push handle component 20 on the rotation path of the non-working position area, so that the micro switch can be continuously triggered when the push handle component 20 rotates in the non-working position area. As shown in FIGS. 12 and 13 , when the push handle component 20 is in the intermediate storage state or the complete storage state, the micro switch 43 will be triggered. Therefore, when the pusher component 20 rotates to the non-working position area, the micro switch 43 is triggered and feeds back the second status signal, and the main control unit 14 receives the second status signal and executes the second control logic. When the pusher component 20 rotates to the working position, the micro switch 43 is released and feeds back the first status signal. The main control unit 14 executes the first control when receiving the first status signal. logic.
  • the micro switch 43 is a normally open switch and is provided in the working position area of the rotation area of the pusher component 20 . More specifically, the micro switch 43 is disposed on the rotation path of the push handle component 20 in the working position area, so that the micro switch can be continuously triggered when the push handle component 20 rotates in the working position area. When the push handle component 20 is locked in multiple gears in the working position area, the micro switch 43 will be triggered and feedback the first status signal.
  • the main control unit 14 receives the first status signal and executes the first control logic. When the pusher component 20 rotates to the non-working position, the micro switch 43 is released and feeds back a second status signal. When the main control unit 14 receives the second status signal, it executes the second control logic.
  • the signal unit 40 is a micro switch, by setting the position of the micro switch and the normally open or normally closed form of the micro switch, as long as the push hand component 20 is in the working position area, regardless of whether the push hand component 20 is in the working position area, When the host 10 is relatively locked or unlocked, the micro switch is released, and the signal unit 40 feedbacks the first status signal. As long as the push hand component 20 is in the non-working position area, regardless of whether the push hand component 20 and the host 10 are relatively locked or unlocked, the micro switch will be released. The moving switches are all triggered, and the signal unit 40 feeds back the second status signal.
  • the signal unit 40 may also be an electrical induction unit.
  • the signal unit 40 is configured as a sensor, and the sensor includes a first component 41 and a second component 42 .
  • One of the first component 41 and the second component 42 is provided on the main unit 10 , and the other is provided on the push handle component 20 or the adjusting member 52 .
  • the first component 41 is configured to feed back the first status signal or the second status signal to the control unit according to the strength of the signal emitted by the sensing second component 42 .
  • the first status signal when the sensed signal is greater than the preset threshold, the first status signal is fed back, and when the sensed signal is less than or equal to the preset threshold, the second status signal is fed back;
  • the first state signal is fed back when the sensed signal is less than or equal to the preset threshold, and the second state signal is fed back when the sensed signal is greater than the preset threshold.
  • the induction signal may be parameters such as magnetic field intensity, light intensity, and pressure, and the signal unit 40 outputs corresponding status signals to the main control unit 14 according to these changes.
  • the adjusting component 50 has a grinding disc tooth structure, that is, when the adjusting component 50 includes an adapter 51, an adjusting component 52 and an operating component 53, the first component 41 is disposed on the main machine, and the second component 42 is disposed On the push handle part 20.
  • the matching portion 521 on the adjusting member 52 When the matching portion 521 on the adjusting member 52 is mated to the first position 511 of the adapter 51 (that is, the working position area), the distance between the first component 41 and the second component 42 is relatively close, and the first component 41 senses The signal emitted by the second component 42 is greater than the preset threshold, so the first component 41 sends a first status signal to the main control unit 14 .
  • the user operates the operating member 53 so that the mating portion 521 on the adjusting member 52 is unmated, since the push handle member 20 or the adjust member 52 moves away from the host 10 along the axis 514, the position of the second member 42 moves with the push handle member 20, so that the second member 42 moves with the push handle member 20.
  • the distance between the first component 41 and the second component 42 becomes larger, so the first component 41 senses that the signal emitted by the second component 42 is less than or equal to the preset threshold, and the first component 41 sends a second status signal to the main control unit 14 .
  • the position of the second member 42 moves with the pusher member 20 so that the distance between the first member 41 and the second member 42 continues to increase, and the first member 41 senses the second member 42
  • the emitted signal continues to weaken and the second status signal continues to be sent to the main control unit 14 .
  • the signal unit 40 feeds back the first status signal; when the pusher component 20 is in the working position and is unlocked with the host 10, the signal unit 40 feeds back the second status signal. .
  • the signal unit 40 feeds back the second status signal.
  • the signal emitted by the second component 42 may be a magnetic field.
  • the second component 42 may be a magnet and the first component 41 may be a Hall element.
  • the first component 41 senses that the signal intensity emitted by the second component 42 is greater than or equal to the first threshold.
  • the first component 41 senses that the signal intensity emitted by the second component 42 is less than or equal to the second threshold, where the first threshold is greater than the second threshold.
  • the Hall element when the fitting portion 521 is coupled to the first position 511 (working position area), the Hall element is closer to the magnet and can induce a stronger magnetic field and send a high-level signal to the control unit, such as 5V, etc.; referring to Figure 6, when the fitting part 521 leaves the first position, the Hall element is far away from the magnet, induces a weak magnetic field, and sends a low-level signal, such as 1.5V, etc. to the control unit. In this way, by setting a reasonable threshold, the state of the pusher component 20 can be accurately determined, so that the main control unit 14 can obtain the corresponding state signal and reasonably control the startup delay time of the functional component 30 .
  • the second component 42 is provided on the pusher component 20 or the adjusting component 52 , and forms a signal on the host 10 that enables the first component 41 to feed back the first status signal to the main control unit 14 Coverage area 44.
  • the pusher component 20 rotates in the working position area
  • the position of the signal coverage area 44 formed by the second component 42 on the host also changes accordingly, and the overlapping portions between the signal coverage areas 43 define an overlapping area.
  • the fitting portion 521 is fitted in each gear area 51a
  • the first component 41 is located in the overlapping area.
  • the main control The control signal fed back by the control unit 14 is always the first control signal.
  • the signal unit provided by this embodiment is explained by taking the adjustment component provided in the first example as an example. It can be understood that the two signal units provided by the above embodiment can be respectively applied to electric tools having the two aforementioned adjustment components. .
  • the electric tool provided in this embodiment detects the position of the pushing hand component 20 by setting the signal unit 40, and feeds back different status signals according to the position of the pushing hand component 20.
  • the control circuit executes different motor starting logic according to different status signals, so that the pushing hand When the component 20 is in the working position, the user can conveniently control the motor to start.
  • the pusher component 20 When the pusher component 20 is in the non-working position, it becomes more difficult for the user to operate the switch component to start the motor, and the probability of misstarting of the motor is reduced, thereby improving the performance of the pusher component. 20Safety of power tools when in non-working position areas.
  • the power tool 100 includes a host 10, a pusher component 20, an adjustment component and an adapter, and a signal unit 40. and motor 14.
  • the push hand component 20 is connected to the main machine 10 and can rotate with the main machine 10.
  • the rotation area of the push hand component 20 includes a working position area and a non-working position area except the working position area.
  • the pushing hand part 20 is used for the user to operate to push the host 10 to move.
  • the pushing hand part 20 is locked on the main body 10 .
  • the functional components include a motor 13 and a working part.
  • the motor is used to drive the working part to move within a set path or working area, and/or to perform cutting tasks.
  • the signal unit 40 is used to feedback different status signals in response to the position change of the push hand component 20. When the push hand component 20 is in the working position area and the push hand component 20 is relatively locked with the host 10, the signal unit 40 feeds back the first status signal. When the push hand component 20 In the non-working position area, the signal unit 40 feeds back the second status signal.
  • the motor 14 is used to drive the electric tool to move within a set path or working area, and/or to perform cutting tasks. Regarding the specific limitations of the electric tool, reference may be made to the aforementioned Embodiment 1, which will not be described again here.
  • the motor control method is executed by the main control unit in the control circuit.
  • the motor control method includes the following steps:
  • Step S100 Receive the status signal fed back by the signal unit 40;
  • Step S200 When the status signal is the first status signal, control the motor 14 to start working according to the first control logic;
  • Step S300 When the status signal is the second status signal, control the motor 14 to start working according to the second control logic, where the second control logic is different from the first control logic.
  • the power tool 100 includes a power-on switch.
  • the power-on switch is configured to be triggered in response to a user operation to switch the control circuit between an active state and an inactive state.
  • the control circuit allows The current of the power supply flows to the motor.
  • the control circuit prohibits the current of the power supply from flowing to the motor.
  • the time from when the power-on switch is triggered and remains in the triggered state until the control circuit switches from the inactive state to the active state is defined as The trigger hold time of the power-on switch.
  • the motor start switch includes a first operating element. The first operating element is used to output a motor start signal in response to user operation.
  • the control circuit is in an activated state and the motor start switch is triggered.
  • the control circuit controls the current flow of the power supply to the motor to make the motor drive work.
  • the control circuit enters the activation state and is allowed to receive the motor start signal within a preset time, where the preset time is defined as the allowed triggering time of the motor start switch.
  • the trigger holding time of the power-on switch is different; or under the first control logic and the second control logic, the allowed triggering time of the motor start switch is different; or the first control logic and the second control logic Under the control logic, the trigger hold time of the power-on switch and the allowed trigger time of the motor start switch are different.
  • the first control logic at least includes:
  • Step S210 When the status signal is the first status signal, determine whether the trigger holding time of the power-on switch reaches the first holding time;
  • Step S211 When the first holding time is reached, the control circuit is allowed to enter the activation state
  • Step S212 When the first holding time has not been reached, prohibit the control circuit from entering the activation state.
  • step S300 the second control logic at least includes:
  • Step S310 When the status signal is the second status signal, determine whether the trigger holding time of the main power-on switch reaches the second holding time;
  • Step S311 When the second holding time is reached, the control circuit is allowed to enter the activation state
  • Step S312 When the second holding time has not been reached, the control circuit is prohibited from entering the activation state, wherein the second holding time is not less than 3 times the first holding time. Preferably, the second holding time is greater than or equal to 2s.
  • the first control logic at least includes: the control circuit enters the activation state, allows the motor start signal to be received within the first preset time, and when receiving the motor start signal, controls the power supply from the power supply. Electric current flows to the motor so that the motor driving working part operates.
  • the second control logic at least includes: allowing the motor start signal to be received within a second preset time when the control circuit enters the activation state, or receiving the motor start signal at a fixed time point at a preset time interval since the control circuit enters the activation state. a motor start signal; and when receiving the motor start signal, control the current flow from the power supply to the motor so that the motor driving working part works, and the second preset time is smaller than the first preset time.
  • the second preset time is less than or equal to 5 seconds.
  • the trigger holding time of the power-on switch and the allowed triggering time of the motor start switch can also be set to be different at the same time.
  • the trigger holding time of the power-on switch and the allowed triggering time of the motor start switch can also be set to be different at the same time.
  • the motor start switch further includes an unlocking element.
  • the unlocking element may be configured as a mechanical operating part, and the mechanical operating part is used to control the first operating element to switch between a locked state and an unlocked state.
  • the mechanical operating member includes a stopper operably coupled to the first operating element. When the unlocking element is not operated, the stopper abuts the first operating element so that the first operating element cannot be operated to move toward the push rod. , so that the motor start signal cannot be output, and the first operating element is in a locked state at this time. When the unlocking element is operated, the stopper releases the first operating element so that the first operating element can be operated to move toward the push rod, and the first operating element is triggered to output a motor start signal. At this time, the first operating element is in Unlocked status. Therefore, under the second control logic, the user needs to trigger the unlocking component and the first operating component within a preset time in order to control the motor to start.
  • the unlocking element can also be configured as an electronic switch for outputting an unlocking signal in response to user operation.
  • the control circuit under the first control logic, the control circuit is configured to receive an unlocking signal and a motor start signal within a first preset time from entering the activation state.
  • the control circuit Under the second control logic, the control circuit is configured to receive an unlocking signal and a motor start signal within a second preset time from entering the activation state, where the second preset time is less than the first preset time.
  • the triggering and holding time of the unlocking element can also be limited to improve the safety of the electric tool.
  • the first control logic at least includes: when the control circuit enters the activation state, determine whether the continuous triggering time of the unlocking element from being triggered to maintain the triggering state reaches the third holding time; when the third holding time is reached, the motor start signal is allowed to be received. , when receiving the motor start signal, controls the current from the power supply to flow to the motor, so that the motor driving unit works.
  • the second control logic at least includes: when the control circuit enters the activation state, it determines whether the continuous triggering time of the unlocking element since it is triggered and maintains the triggering state reaches the fourth holding time; when the fourth holding time is reached, the motor start signal is allowed to be received, and the When the motor start signal is received, the current from the power supply is controlled to flow to the motor so that the motor driving working part works; wherein the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to 3 times the third holding time. Since the fourth holding time is greater than the third holding time, under the second control logic, the user needs to trigger the unlocking element for a long time to allow the control circuit to receive the motor start signal.
  • the second control logic when the unlocking component is an electronic switch, the second control logic further includes: when the control circuit enters the activation state, allowing the unlocking signal to be received at a fixed time point at a preset time interval from the time the control circuit enters the activation state. . That is to say, under the second control logic, the unlocking component can only be triggered to receive the unlocking signal at a fixed time after the control circuit enters the activation state. When the time does not reach the fixed time or exceeds the fixed time, the control circuit is not allowed to Receive unlock signal. Under normal working conditions, the user can trigger the unlocking component within a period of time after triggering the power-on switch.
  • the solution provided by this embodiment can improve the safety of using power tools.
  • the motor start switch since the motor start switch includes an unlocking element and a first operating element, not only can the unlocking element be limited By continuing the triggering time, the allowed triggering time of the first operating element can also be limited to further improve the difficulty of starting the motor under the second control logic.
  • the first control logic also includes: starting from being triggered, the continuous triggering time of the unlocking element maintaining the triggering state reaches the third holding time, allowing the motor start signal to be received within the first preset time.
  • the second control logic also includes: since the unlocking element is triggered, the continuous triggering time of maintaining the triggering state reaches the fourth holding time, allowing the motor start signal to be received within the second preset time, and the second preset time is less than the first preset time. time. Specifically, the second preset time is less than or equal to 5 seconds, and the first preset time is greater than or equal to 30 seconds.
  • the second control logic further includes: since the unlocking element is triggered, the continuous triggering time of maintaining the triggering state reaches a fourth holding time, allowing the motor start signal to be received at a fixed time point separated by a preset time from reaching the fourth holding time.
  • the preset time may be the 5th, 10th, 15th or 20th s after reaching the fourth holding time.
  • the power tool may not be provided with a power-on switch 11 , and the control circuit may enter the activation state when the power tool is plugged into the power source 12 .
  • the power tool further includes a power supply installation part for detachably installing a power supply, the power supply includes a battery pack, and the control circuit enters the activated state in response to the battery pack being installed on the battery pack installation part.
  • the control circuit includes a motor start switch.
  • the motor start switch includes an unlocking element and a first operating element.
  • the unlocking element is used to output an unlocking signal in response to a user trigger.
  • the first operating element is used to output a motor start signal in response to a user trigger.
  • the first control logic at least includes: when the control circuit enters the activated state, determine whether the continuous triggering time from the unlocking element being triggered until the unlocking signal is output to the control circuit reaches the third holding time; when the third holding time is reached, It is allowed to receive the motor start signal. When the motor start signal is received, the current from the power supply is controlled to flow to the motor to make the motor drive working part work.
  • the second control logic at least includes: when the control circuit enters the activation state, determine whether the continuous triggering time of the unlocking element from being triggered until outputting the unlocking signal to the control circuit reaches the fourth holding time; when the fourth holding time is reached, the motor start signal is allowed to be received. , when receiving the motor start signal, control the current flow from the power supply to the motor to make the motor drive working part work; wherein the fourth holding time is greater than the third holding time, and the fourth holding time is greater than or equal to 3 times of the third holding time times.
  • the first control logic further includes: allowing the motor start signal to be received within a first preset time from the time the unlocking element is triggered until the continuous triggering time of outputting the unlocking signal to the control circuit reaches the third holding time.
  • the second control logic also includes: allowing the motor start signal to be received within the second preset time from the time the unlocking element is triggered until the continuous triggering time of outputting the unlocking signal to the control circuit reaches the fourth holding time, the second preset time Less than the first preset time; or since the time the unlocking element has been triggered and maintained in the triggered state reaches the fourth holding time, the motor start signal is allowed to be received at a fixed time point separated by a preset time.
  • control method further includes: when receiving the first status signal, allowing the rotation speed when the motor starts to be the first rotation speed; when receiving the second status signal, allowing the rotation speed when the motor starts to be the second rotation speed.
  • the second speed is less than or equal to one-third of the first speed.
  • the second rotational speed is less than or equal to one-fifth of the first rotational speed.
  • control method further includes: controlling the motor to run at the second speed and then stop for a preset time, where the preset time is less than or equal to 5 seconds.
  • the above control method collects the status signals fed back by the signal unit when the pushing hand part is in different positions, and executes different starting logic according to different status signals, so that when the pushing hand part is in the stowed state, the probability of misstarting of the electric tool is reduced, thereby reducing the user's use risks and improve the safety of power tools.
  • the third embodiment of the present application provides an electric tool 100 , including a main machine 10 , a pusher component 20 , an adjustment component 52 and an adapter component 51 , functional components, a signal unit 40 and a control circuit.
  • the push hand component 20 is connected to the main machine 10.
  • the push hand component 20 can rotate relative to the main machine 10 around the connection point between the push hand component 20 and the main machine 10.
  • the rotation area of the push hand component 20 includes a working position area and a non-working position area except the working position area.
  • the pushing hand part 20 is used for the user to operate to push the host 10 to move.
  • the adjusting member 52 and the adapter 51 are used to adjust the position of the pusher component 20.
  • the pusher component 20 When the adjuster 52 cooperates with the adapter 51, the pusher component 20 is locked on the main unit 10. When the adjuster 52 and the adapter 51 are uncoupled, the pusher component 20 is released. 20 is unlocked with the host 10 and can rotate around the host 10 .
  • the functional components include a motor 13 and a working part. The motor is used to drive the working part to move within a set path or working area, and/or to perform cutting tasks.
  • the signal unit 40 is used to feedback different status signals in response to the position change of the push hand component 20. When the push hand component 20 When the pusher component 20 is in the working position and the pusher component 20 is relatively locked with the host 10, the signal unit 40 feeds back a first status signal.
  • the signal unit 40 feeds back a second status signal.
  • the control circuit receives the status signal fed back by the pusher component 20 and controls the working speed of the motor 13 when it is started.
  • the control circuit receives the first status signal, the motor 13 is allowed to start working at the first speed.
  • the control circuit receives the second status signal, the motor 13 is allowed to start working at the second speed.
  • the second speed is not greater than three times the first speed. one part.
  • the main control unit 14 when the motor 13 runs at the second rotation speed, the main control unit 14 is also used to control the motor 13 to stop after running for a preset time, where the preset time is less than 5 seconds. By controlling the motor 13 to run for a preset time and then stop, safety risks can be further reduced.
  • the main control unit 14 is also used to adjust the starting logic of the motor 13 according to the status signal.
  • the main control unit 14 uses the first control logic to control the motor 13 to start working.
  • the main control unit 14 uses the second control logic to control the motor 13 to start working.
  • the second control logic is different from The first control logic.
  • the electric tool 100 provided in the above embodiment allows the motor 13 to start at different rotational speeds when the pusher component 20 is in the working position area and the non-working position area. By lowering the starting speed of the motor 13 when the pusher component 20 is in the non-working position area, Even if the user mistakenly starts the motor 13 during the process of folding the push rod, it will not cause harm to the user, thereby reducing the user's risk and improving the safety of the power tool 100 .
  • Yet another embodiment of the present application provides a control method for an electric tool, which is based on the electric tool provided in the above embodiment. This method is executed by the main control unit in the control circuit, as shown in Figure 18.
  • the control method includes the following steps:
  • Step S400 Determine the type of the received status signal
  • Step S500 When receiving the first status signal, allow the motor to start working at the first speed
  • Step S600 When receiving the second status signal, allow the motor to start working at a second rotational speed, where the second rotational speed is not greater than one-third of the first rotational speed.
  • the second rotational speed is no greater than one-fifth of the first rotational speed.
  • control method further includes: controlling the motor to stop after controlling the motor to run at the second speed for a preset time.
  • the preset time is less than or equal to 5s.
  • the electric tool 100 provided in the above embodiment allows the motor 13 to start at different rotational speeds when the pusher component 20 is in the working position area and the non-working position area. By lowering the starting speed of the motor 13 when the pusher component 20 is in the non-working position area, Even if the user mistakenly starts the motor 13 during the process of folding the push rod, it will not cause harm to the user, thereby reducing the user's risk and improving the safety of the power tool 100 .
  • an electric tool including: a host; a pusher component connected to the host.
  • the pusher component can perform rotational movement relative to the host around the connection point between the pusher component and the host.
  • the rotation area of the pusher component includes a working position. area and the non-working position area except the working position area.
  • the push hand component is used for user operation to push the host to move.
  • the adjusting piece and the fitting piece when the adjusting piece matches the fitting piece, the pushing hand part is locked on the main machine, the adjusting piece and the fitting piece are unfitted, the pushing hand part is unlocked on the main machine and can rotate around the main machine.
  • the signal unit is used to feedback different status signals in response to the position change of the push hand component.
  • the signal unit feeds back the first status signal.
  • the signal unit feeds back the second status signal.
  • Functional components include a motor and a working part.
  • the motor is used to drive the working part to move within a set path or working area, and/or to perform cutting tasks.
  • the control unit is used to receive the status signal fed back by the signal unit and adjust the starting logic of the motor according to the status signal. When the control unit receives the first status signal, the control unit uses the first control logic to control the motor to start working.
  • control unit When the control unit receives the second status signal, the control unit uses the second control logic to control the motor to start working.
  • the second control logic is different from The first control logic.
  • the control unit is also configured to allow the motor to start working at a first speed when receiving a first status signal, and to allow the motor to start working at a second speed when receiving a second status signal, and the second speed is smaller than the first speed, and The second rotational speed is less than or equal to one third of the first rotational speed.
  • the second rotational speed is less than or equal to one-fifth of the first rotational speed.
  • the signal unit feeds back different status signals, and the control unit executes different starting logic according to the different status signals, so that when the push hand part is in the stowed state Motors are more difficult to start, slowing down power tools The probability of mis-starting is reduced, thereby reducing the user's risk. Even if the motor is started and the pusher part is in different positions, the control unit allows the motor to start at different speeds.
  • first and second are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.
  • connection In the present invention, unless otherwise clearly stated and limited, the terms “installation”, “connection”, “connection”, “fixing” and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated into one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements or an interactive relationship between two elements, unless otherwise specified limitations. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
  • a first feature being “on” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch.
  • the terms “above”, “above” and “above” the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature.
  • "Below”, “under” and “under” the first feature is the second feature can mean that the first feature is directly below or diagonally below the second feature, or just 0 simply means that the first feature is less horizontally than the second feature.

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Abstract

一种电动工具(100)及电动工具(100)的电机(13)控制方法,当推手部件(20)处于工作位置区时且推手部件(20)相对于主机(10)锁定时,信号单元(40)反馈第一状态信号;当推手部件(20)处于非工作位置区时,信号单元(40)反馈第二状态信号。控制单元(14)接收到第一状态信号,控制电机(13)按照第一控制逻辑启动,控制单元(14)接收到第二状态信号,控制电机(13)按照第二控制逻辑启动,第二控制逻辑不同于第一控制逻辑。如此,当推手部件(20)处于非工作位置区时,采用不同的启动逻辑控制电机(13)启动,降低用户由于误触发开关组件导致电动工具(100)误启动的概率,降低用户的使用风险,提高电动工具(100)的安全性。

Description

电动工具
本申请要求申请日为2022年08月31日、申请号为CN202211055421.5、发明名称为“电动工具及电动工具的电机控制方法”的中国专利申请、申请日为2023年04月28日、申请号为CN202310484470.9、发明名称为“电动工具及电动工具的电机控制方法”的中国专利申请以及申请日为2023年06月27日、申请号为CN202310768279.7、发明名称为“电动工具”的中国专利申请的优先权。
技术领域
本发明涉及电动设备技术领域,特别是涉及电动工具的电机控制。
背景技术
随着城市绿化面积的不断扩大,公园、公路等公共场所的绿化带遍及全国各地,电动园林工具也被广泛应用,比如割草机、修枝机等。对于园林工具而言,如割草机等,通常需要在不同的工作场地间进行转场操作。对于推杆可收纳的割草机,在转场运输时,为了节省运输空间,操作者通常会先将割草机的推杆旋转至收纳状态,在旋转推杆的过程中或者处于收纳状态下,操作者极有可能误触发电机开关,导致推杆在收纳过程中或者处于收纳状态下,操作者依然能够正常启动割草机,此时,操作者离割草机太近而陷入危险之中,给操作者带来很大的安全隐患。
发明内容
基于此,有必要提供一种电动工具,增加电动工具在非正常工作下电机启动的难度,降低运输或者转运过程中误触发启动几率。
本申请的一个实施例提供一种电动工具,包括:主机;功能部件,包括工作部和驱动所述工作部工作的电机;电机启动开关,响应用户的操作控制所述电机;推手部件,连接所述主机,所述推手部件可绕所述主机旋转,所述推手部件的旋转区域包括工作位置区和非工作位置区,当所述推手部件处于所述工作位置区,所述推手部件与所述主机相对固定,用于供用户操作以推动所述主机移动;调节件和配接件,当所述调节件与所述配接件配合,所述推手部件锁定于所述主机,当所述调节件与所述配接件解除配合,所述推手部件与所述主机解除锁定,并可绕所述主机旋转;信号单元,所述信号单元用于响应所述推手部件的位置变化反馈不同的状态信号,当所述推手部件处于所述工作位置区且所述推手部件与所述主机相对锁定时,所述信号单元能够反馈第一状态信号,当所述推手部件处于所述非工作位置区,所述信号单元反馈第二状态信号;控制电路,用于接收所述信号单元反馈的状态信号,并根据接收到的不同的所述状态信号调整启动所述电机的控制逻辑;当所述控制电路接收到所述第一状态信号,所述控制电路按照第一控制逻辑控制所述电机启动工作,当所述控制电路接收到所述第二状态信号,所述控制电路按照第二控制逻辑控制所述电机启动工作,所述第二控制逻辑不同于所述第一控制逻辑。
在一个实施例中,所述电动工具包括上电开关,所述上电开关响应用户的操作被触发,以使所述控制电路在非激活状态和激活状态之间切换,当所述控制电路处于所述激活状态,所述控制电路允许电源的电流流向所述电机,当所述控制电路处于所述非激活状态,所述控制电路禁止所述电源的电流流向所述电机,其中所述上电开关自被触发开始到所述控制电路由所述非激活状态切换到所述激活状态的时间定义为所述上电开关的触发保持时间;所述电机启动开关包括第一操作元件,所述第一操作元件响应用户操作输出电机启动信号,所述控制电路处于所述激活状态下且所述第一操作元件被触发,所述控制电路控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作,其中所述控制电路进入所述激活状态,允许在预设时间接收所述电机启动信号,所述预设时间定义为所述第一操作元件的允许触发时间;在所述第一控制逻辑和所述第二控制逻辑下,所述上电开关的触发保持时间不同;和/或在所述第一控制逻辑和所述第二控制逻辑下,所述第一操作元件的允许触发时间不同。
在一个实施例中,所述控制电路还包括计时单元,以使所述控制电路根据所述计时单元的计时时间判断所述上电开关的触发保持时间是否满足预设条件,和/或所述控制电路还包括计时单元,以使所述控制电路根据所述计时单元的计时时间判断所述第一操作元件的允许触发时间是否满足预设条件。
在一个实施例中,第一控制逻辑至少包括:上电开关的触发保持时间达到第一保持时间,允许控制 电路进入激活状态;第二控制逻辑至少包括:上电开关的触发保持时间达到第二保持时间,允许控制电路进入激活状态;其中,第二保持时间大于第一保持时间,且第二保持时间大于等于第一保持时间的3倍。
在一个实施例中,第一控制逻辑还包括:第一控制逻辑还包括:控制电路进入激活状态下,所述第一操作元件的允许触发时间配置在第一预设时间内,且控制电路在第一预设时间内接收到电机启动信号,控制自电源的电流流向电机,使电机驱动工作部工作;第二控制逻辑至少包括:控制电路进入激活状态下,所述第一操作元件的允许触发时间配置在第二预设时间内,且控制电路在第二预设时间内接收到电机启动信号,控制自电源的电流流向电机,使电机驱动工作部工作,其中第二预设时间小于第一预设时间。
在一个实施例中,第二控制逻辑至少包括:电机启动开关的允许触发时间配置为从控制电路进入激活状态起间隔预设固定时间点,控制电路允许在所固定时间点接收电机启动信号,以控制自电源的电流流向电机,使电机驱动工作部工作。
在一个实施例中,所述第二保持时间大于等于2s;所述第二预设时间小于等于5s。
在一个实施例中,所述第二控制逻辑至少包括:所述第一操作元件的允许触发时间配置为与所述控制电路进入所述激活状态间隔第一预设时间的固定时间点,所述控制电路允许在所述固定时间点接收所述电机启动信号,以控制所述电源的电流流向所述电机,使所述电机驱动所述工作部工作。
在一个实施例中,所述电机启动开关还包括解锁元件,所述解锁元件配置为响应用户操作输出解锁信号;所述第一控制逻辑至少包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到所述解锁信号的持续触发时间达到第三保持时间,所述控制电路允许接收所述电机启动信号,以根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到所述解锁信号的持续触发时间达到第四保持时间,所述控制电路允许接收所述电机启动信号,以根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;所述第四保持时间大于所述第三保持时间,且所述第四保持时间大于等于所述第三保持时间的3倍
在一个实施例中,所述电机启动开关还包括解锁元件,所述解锁元件配置为响应用户操作输出解锁信号,所述控制电路在接收到所述解锁信号后,允许接收所述电机启动信号;所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,所述控制电路进入激活状态与所述控制电路接收到所述解锁信号之间间隔预设固定时间点。
在一个实施例中,所述电动工具还包括电源安装部,用于安装电源,所述电源包括电池包,所述电池包可拆地连接到所述电源安装部以给所述电动工具供电,所述控制电路响应所述电池包安装至所述电源安装部而进入激活状态;所述电机启动开关包括解锁元件和第一操作元件,所述解锁元件响应用户操作输出解锁信号,所述第一操作元件响应用户操作输出电机启动信号;所述第一控制逻辑还包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到所述解锁信号的持续触发时间达到第三保持时间,所述控制电路允许接收所述电机启动信号,并根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;所述第二控制逻辑还包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到输出所述解锁信号的持续触发时间达到第四保持时间,允许所述控制电路接收所述电机启动信号,并根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;所述第四保持时间大于所述第三保持时间,且所述第四保持时间大于等于所述第三保持时间的3倍。
在一个实施例中,第一控制逻辑还包括:控制电路允许在第一预设时间内接收电机启动信号;第二控制逻辑还包括:控制电路允许在第二预设时间内接收电机启动信号,第二预设时间小于第一预设时间。
在一个实施例中,第二控制逻辑还包括:控制电路允许自达到第四保持时间起,间隔预设时间的固定时间点接收电机启动信号。
在一个实施例中,当信号单元反馈第一状态信号时,控制电路允许电机至少按照第一转速启动工作;当信号单元反馈第二状态信号时,控制电路允许电机至少按照第二转速启动工作,第二转速不大于第一 转速的三分之一。
在一个实施例中,第二转速不大于第一转速的五分之一。
在一个实施例中,控制电路还用于控制电机以第二转速运转预设时间后停机,预设时间小于等于5s。
在一个实施例中,所述电动工具包括手推割草机;所述电机包括切割电机,所述工作部包括切割部,所述切割电机用于驱动所述切割部运动,以执行切割工作;和/或所述电机包括自驱电机,所述工作部包括移动组件,所述自驱电机用于驱动所述移动组件移动,以带动所述主机移动。
在一个实施例中,信号单元包括微动开关,所述信号单元配置为微动开关,所述微动开关包括触发部和开关件,所述开关件受所述触发部控制,所述微动开关响应所述推手部件在所述工作位置区和所述非工作位置区之间变化在断开状态和接通状态之间切换,其中,所述微动开关处于所述断开状态或所述接通状态下,所述信号单元择一地反馈所述第一状态信号或所述第二状态信号。
在一个实施例中,所述信号单元配置为传感器,所述传感器包括第一部件和第二部件,所述第一部件和所述第二部件中的一个设置于所述主机上,另一个设置于所述推手部件或所述调节件上,所述第一部件被配置为根据感应所述第二部件散发的信号强弱向所述控制电路反馈所述第一状态信号或所述第二状态信号。
一种电动工具的电机控制方法,其中,电动工具包括:主机;功能部件,包括工作部和驱动所述工作部工作的电机;电机启动开关,响应用户的操作控制所述电机;推手部件,连接所述主机,所述推手部件可绕所述主机旋转,所述推手部件的旋转区域包括工作位置区和非工作位置区,当所述推手部件处于所述工作位置区,所述推手部件与所述主机相对固定,用于供用户操作以推动所述主机移动;调节件和配接件,当所述调节件与所述配接件配合,所述推手部件锁定于所述主机,当所述调节件与所述配接件解除配合,所述推手部件与所述主机解除锁定,并可绕所述主机旋转;信号单元,所述信号单元用于响应所述推手部件的位置变化反馈不同的状态信号,当所述推手部件处于所述工作位置区且所述推手部件与所述主机相对锁定时,所述信号单元反馈第一状态信号,当所述推手部件处于所述非工作位置区,所述信号单元反馈第二状态信号;
电机控制方法包括:接收信号单元反馈的状态信号;当状态信号为第一状态信号,根据第一控制逻辑控制电机启动工作;当状态信号为第二状态信号,根据第二控制逻辑控制电机启动工作,第二控制逻辑不同于第一控制逻辑。
在一个实施例中,所述控制电路包括上电开关,所述上电开关用于响应用户的操作被触发,以使所述控制电路在所述非激活状态和所述激活状态之间切换,当所述控制电路处于所述激活状态,所述控制电路允许所述电源的电流流向所述电机,当所述控制电路处于所述非激活状态,所述控制电路禁止所述电源的电流流向所述电机,所述上电开关自被触发开始、保持触发状态,直到所述控制电路由所述非激活状态切换到所述激活状态的时间定义为所述上电开关的触发保持时间;电机启动开关包括第一操作元件,所述第一操作元件用于响应用户操作输出电机启动信号,所述控制电路处于所述激活状态下且所述电机启动开关被触发,所述控制电路控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作,所述控制电路进入所述激活状态,允许在预设时间内接收所述电机启动信号,所述预设时间定义为所述电机启动开关的允许触发时间;在所述第一控制逻辑和所述第二控制逻辑下,所述上电开关的触发保持时间不同;和/或在所述第一控制逻辑和所述第二控制逻辑下,所述电机启动开关的允许触发时间不同。
在一个实施例中,所述第一控制逻辑至少包括:判断所述上电开关自的触发保持时间是否达到第一保持时间;达到所述第一保持时间,允许所述控制电路进入所述激活状态;所述第二控制逻辑至少包括:判断所述上电开关的触发保持时间是否达到第二保持时间;达到所述第二保持时间,允许所述控制电路进入所述激活状态,所述第二保持时间大于等于所述第一保持时间的3倍。
在一个实施例中,所述第一控制逻辑还包括:所述控制电路进入所述激活状态下,允许在第一预设时间内接收所述电机启动信号;在接收到所述电机启动信号时,控制自所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;
所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,允许在第二预设时间内接收所述 电机启动信号,在接收到所述电机启动信号时,控制自所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作,所述第二预设时间小于所述第一预设时间。
在一个实施例中,所述第二控制逻辑至少包括:允许自所述控制电路进入激活状态起、间隔预设时间的固定点接收所述电机启动信号;在接收到所述电机启动信号时,控制自所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作,所述第二预设时间小于所述第一预设时间。
在一个实施例中,所述第二保持时间大于等于2s;所述第二预设时间小于等于5s。
在一个实施例中,电机启动开关还包括解锁元件,所述解锁元件包括可操作地耦接到第一操作元件的止挡件,以防止第一操作元件被直接致动。
在一个实施例中,电机启动开关还包括解锁元件,所述解锁元件响应用户操作输出的解锁信号;所述第一控制逻辑至少包括:所述控制电路进入所述激活状态下,判断所述解锁元件的持续触发时间是否达到第三保持时间;达到第三保持时间,允许接收所述电机启动信号,在接收到所述电机启动信号时,控制自所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,判断所述解锁元件的持续触发时间是否达到第四保持时间;达到第四保持时间,允许接收所述电机启动信号,并在接收到所述电机启动信号时,控制自所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;所述第四保持时间大于所述第三保持时间,且所述第四保持时间大于等于所述第三保持时间的3倍。
在一个实施例中,所述电机启动开关还包括解锁元件,所述解锁元件配置为响应用户操作输出解锁信号,所述控制电路在接收到所述解锁信号后,允许接收所述电机启动信号;所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,所述控制电路进入激活状态与所述控制电路接收到所述解锁信号之间间隔第二预设时间。
在一个实施例中,所述第一控制逻辑还包括:自所述解锁元件自被触发开始、保持触发状态的时间达到所述第三保持时间起,允许在第一预设时间内接收所述电机启动信号;
所述第二控制逻辑还包括:自所述解锁元件自被触发开始、保持触发状态的时间达到所述第四保持时间起,允许在第二预设时间内接收所述电机启动信号,或自所述解锁元件自被触发开始、保持触发状态的时间达到所述第四保持时间起,允许在间隔预设时间的固定时间点接收所述电机启动信号,所述第二预设时间小于所述第一预设时间。
在一个实施例中,电动工具还包括电源安装部,电源包括电池包,电池包可拆卸地安装至电源安装部以为电动工具供电,控制电路响应电池包安装至电池包安装部,进入激活状态;控制电路包括电机启动开关,电机启动开关包括解锁元件和第一操作元件,解锁元件用于响应用户触发输出解锁信号,第一操作元件用于响应用户触发输出电机启动信号;第一控制逻辑至少包括:控制电路进入激活状态下,判断解锁元件的持续触发时间是否达到第三保持时间;达到第三保持时间,允许接收电机启动信号,在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作;第二控制逻辑至少包括:控制电路进入激活状态下,判断解锁元件的持续触发时间是否达到第四保持时间;达到第四保持时间,允许接收电机启动信号,在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作第四保持时间大于第三保持时间,且第四保持时间大于等于第三保持时间的3倍。
在一个实施例中,第一控制逻辑还包括:自解锁元件自被触发开始、保持触发状态的时间达到第三保持时间起,允许在第一预设时间内接收电机启动信号;第二控制逻辑还包括:自解锁元件自被触发开始、保持触发状态的时间达到第四保持时间起,允许在第二预设时间内接收电机启动信号,第二预设时间小于第一预设时间;或自解锁元件自被触发开始、保持触发状态的时间达到第四保持时间起,允许在间隔预设时间的固定时间点接收电机启动信号。
在一个实施例中,所述控制方法还包括:当接收到所述第一状态信号时,允许电机启动时的转速为第一转速;当接收到所述第二状态信号时,允许电机启动时的转速为第二转速,所述第二转速不大于所述第一转速的三分之一。
在一个实施例中,所述控制方法还包括:在控制所述电机按照所述第二转速转动预设时间后,控制所述电机停机。
一种电动工具,其特征在于,包括:主机;功能部件,包括工作部和驱动所述工作部工作的电机; 电机启动开关,响应用户的操作控制所述电机;推手部件,连接主机,推手部件可绕主机旋转,推手部件的旋转区域包括工作位置区和非工作位置区,当推手部件处于工作位置区,推手部件与主机相对固定,用于供用户操作以推动主机移动;调节件和配接件,当调节件与配接件配合,推手部件锁定于主机,当调节件与配接件解除配合,推手部件与主机解除锁定,并可绕主机旋转;信号单元,信号单元用于响应推手部件的位置变化反馈不同的状态信号,当推手部件处于工作位置区且所述推手部件与所述主机相对锁定时,信号单元反馈第一状态信号,当推手部件处于非工作位置区,信号单元反馈第二状态信号;控制电路,用于接收信号单元反馈的状态信号,当控制电路接收到第一状态信号时,允许电机按照第一转速启动工作,当控制单元接收到第二状态信号时,允许电机按照第二转速启动工作,第二转速小于等于第一转速的三分之一。
在一个实施例中,控制电路还用于控制电机以第二转速运转预设时间后停机,预设时间小于等于5s。
一种电动工具的电机控制方法,电动工具包括:主机;功能部件,包括工作部和驱动所述工作部工作的电机;电机启动开关,响应用户的操作控制所述电机;推手部件,连接主机,推手部件可绕主机旋转,推手部件的旋转区域包括工作位置区和非工作位置区,当推手部件处于工作位置区,推手部件与主机相对固定,用于供用户操作以推动主机移动;调节件和配接件,当调节件与配接件配合,推手部件锁定于主机,当调节件与配接件解除配合,推手部件与主机解除锁定,并可绕主机旋转;信号单元,信号单元用于响应推手部件的位置变化反馈不同的状态信号,当推手部件处于工作位置区且所述推手部件与所述主机相对锁定时,信号单元反馈第一状态信号,当推手部件处于非工作位置区,信号单元反馈第二状态信号;控制方法包括:当接收到第一状态信号时,允许电机至少按照第一转速启动工作;当接收到第二状态信号时,允许电机至少按照第二转速启动工作,第二转速不大于第一转速的三分之一。
一种电动工具,其特征在于,包括:主机;功能部件,包括工作部和驱动所述工作部工作的电机;电机启动开关,响应用户的操作控制所述电机;推手部件,连接主机,推手部件可绕主机旋转,推手部件的旋转区域包括工作位置区和非工作位置区,当推手部件处于工作位置区,推手部件与主机相对固定,用于供用户操作以推动主机移动;调节件和配接件,当调节件与配接件配合,推手部件锁定于主机,当调节件与配接件解除配合,推手部件与主机解除锁定,并可绕主机旋转;信号单元,信号单元用于响应推手部件的位置变化反馈不同的状态信号,当推手部件处于工作位置区且所述推手部件与所述主机相对锁定时,信号单元反馈第一状态信号,当推手部件处于非工作位置区,信号单元反馈第二状态信号;控制电路,用于接收信号单元反馈的状态信号,并根据状态信号调整对电机的启动控制逻辑;当控制电路接收到第一状态信号,控制电路根据第一控制逻辑控制电机启动工作,当控制电路接收到第二状态信号,控制电路按照第二控制逻辑控制电机启动工作,第二控制逻辑不同于第一控制逻辑;当控制电路接收到第一状态信号时,还允许电机按照第一转速启动工作,当控制单元接收到第二状态信号时,还允许电机按照第二转速启动工作,第二转速小于等于第一转速的三分之一。
在一个实施例中,所述控制方法还包括:在控制所述电机按照所述第二转速转动预设时间后,控制所述电机停机。
附图说明
构成本申请的一部分的附图用来提供对本发明的进一步理解,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请中一个实施例提供的工作状态时的电动工具结构示意图;
图2为本申请中一个实施例提供的中间收纳状态时的电动工具结构示意图;
图3为本申请中一个实施例提供的电动工具的控制电路模块示意图;
图4为本申请中一个实施例提供的推手部件结构局部示意图;
图5为本申请中一个实施例提供的操作件处于锁定状态时的电动工具结构剖视图;
图6为本申请中一个实施例提供的操作件处于解锁状态时的电动工具结构剖视图;
图7为本申请中一个实施例提供的调节部件结构示意图;
图8为本申请中一个实施例提供的调节部件结构爆炸示意图;
图9为本申请中一个实施例提供的底座结构示意图;
图10为本申请中一个实施例提供的调节件结构示意图;
图11为本申请中又一实施例提供的工作状态时的电动工具结构示意图;
图12为本申请中又一实施例提供的中间收纳状态时的电动工具结构示意图;
图13为本申请中又一实施例提供的完全收纳状态时的电动工具结构示意图;
图14为本申请中一个实施例提供的第二部件的信号覆盖区分析示意图;
图15为本申请中一个实施例提供的电动工具启动控制流程图一;
图16为本申请中又一实施例提供的电动工具启动控制流程图二;
图17为本申请中又一实施例提供的电动工具启动控制流程图三;
图18为本申请中又一实施例提供的电动工具启动控制流程图四。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施,本领域技术人员可以在不违背本发明内涵的情况下做类似改进,因此本发明不受下面公开的具体实施例的限制。
本申请提供一种电动工具,可以在推手部件折叠过程中降低电动工具误启动的概率,提高电动工具的安全性。本申请的电动工具可以是手推割草机也可以是其他类型的手推式电动工具,并不局限于手推割草机。
请参考图1与图2,电动工具100包括:主机10、推手部件20、功能部件30、电机启动开关15、信号单元40和控制电路(图1、图2中未示出)。
其中功能部件30设置在主机10上,功能部件30包括电机13和工作部31,电机13用于驱动工作部31带动主机10在设定的路径或工作区域内移动,和/或执行工作任务。电机启动开关15用于响应用户操作控制电机13启动。电动工具还包括电源安装部,用于安装电源。电源包括电池包,电池包可拆卸地连接到电源安装部,以给电动工具供电,电动工具整机上电后,电机启动开关15可以响应用户操作控制电机13启动。
推手部件20连接于主机10,且可绕主机10旋转。推手部件20具有第一端和第二端,其中,推手部件20的第一端与主机10可枢转地连接,推手部件20的第二端可以供用户握持推动电动工具100行走。在本实施方式中,推手部件20可以包括推杆21及延长杆22,推杆21通过延长杆22连接在主机10上。其中推杆21设置在推手部件20的第二端,推杆21用于供用户握持,以对电动工具100施加推力,辅助电动工具100行走,同时用户可以通过推动推杆21改变电动工具100的移动方向。为了便于收纳和运输,推手部件20还可设计为可伸缩结构,比如:推杆21可滑动套设于延长杆22上等。
推手部件20的旋转区域包括工作位置区和除工作位置区外的非工作位置区。其中,电动工具置于地面上,定义平行于电动工具前进方向的方向为电动工具的纵向(见图1~图2),在图1~图2中,定义位于电动工具纵向的左边为电动工具的前侧,位于电动工具纵向的右边为电动工具的后侧。当推手部件20处于工作位置区时,推手部件20的第二端相对于第一端位于主机10的后侧,推手部件20处于非工作位置区的至少部分位置时,推手部件20的第二端相对于第一端位于主机10的前侧。进一步的,工作位置区一般可以理解为,在该旋转区域内,推手部件20能够锁定在主机10的预设位置上,从而用户能够推动主机10在平面上移动,并控制电动工具执行工作任务。在一种实现方式中,主机10在工作位置区内设置有多个预设位置,推手部件20可以锁定在其中一个预设位置,也可以从一个预设位置解锁并旋转至另一个预设位置。非工作位置区一般可以理解为,在该旋转区域内,推手部件20相对于主机 10旋转折叠至存储状态(例如图2和图12、图13)。推手部件20旋转至非工作位置区时,可以减小电动工具整体占用的空间,便于运输、存储电动工具。示例性地,如图1所示,当推手部件20固定在第一位置511,推手部件20处于工作位置区,此时推手部件20处于工作状态。如图2所示,当推手部件20固定在第三位置517,推手部件20处于非工作位置区,此时推手部件20处于收纳状态。推手部件20可以从第一位置511旋转到第三位置517,也可以从第三位置517旋转至第一位置511。当然,图1、图2仅为一种示例,实际操作时,推手部件20绕主机旋转范围对应的旋转角度可以大于等于90°。
电动工具100还包括调节部件50,用于调节推手部件20相对于主机10的旋转位置。调节部件50包括配接件51和调节件52。当配接件51与调节件52配合,推手部件20相对于主机10锁定。当配接件51与调节件52解除配合,推手部件20与主机10解除锁定,并可在操作者操作下绕主机10旋转。用户可以通过操作配接件51或调节件52以固定推手部件20或解除固定推手部件20。示例性地,配接件51和调节件52可以其中一个设置在主机10上,另一个设置在推手部件20上。
当需要运输电动工具100时,用户会移动至电动工具100的主机10旁,进行推手部件20的旋转动作,以将推手部件20旋转至非工作位置区进行收纳。推手部件20上设置有开关组件,开关组件用于控制电机启动。若用户旋转推手部件20时误触发开关组件,可能导致电动工具100上电启动,由于此时用户距离工作部较近,会导致用户处于危险状态。
基于此,本实施例提供的电动工具100在主机10和/或推手部件20上还设置有信号单元40,信号单元40可以响应推手部件20的位置变化以反馈不同的状态信号。当推手部件20处于工作位置区且推手部件与主机相对锁定,信号单元40反馈第一状态信号,当推手部件20处于非工作位置区,信号单元40反馈第二状态信号。
进一步的,当推手部件20处于工作位置区,且推手部件20与主机10解除锁定,不同的信号单元40配置形式,以及不同配置形式的信号单元与推手部件20的配合方式不同,导致信号单元40可能反馈第一状态信号,也可能反馈第二状态信号。针对当推手部件20处于工作位置区,且推手部件20与主机10解除锁定,信号单元40可能反馈第一状态信号,也可能反馈第二状态信号,反馈不同状态信号的具体实施结构在后续的段落里将进行详细介绍。
信号单元40可以为机械触发开关,当推手部件20移动到预设区域(工作位置区或非工作位置区)时,触发开关响应推手部件20的位置变化被触发或被释放,以反馈不同的状态信号。信号单元40也可以为电气感应单元,当推手部件20的位置发生变化,电气感应单元产生的感应信号强弱不同,不同强弱的感应信号代表不同的状态信号,例如感应信号低于预设阈值,感应开关反馈的为第一状态信号,感应信号高于预设阈值,感应开关反馈的为第二状态信号,反之亦可。关于信号单元40的具体结构,在下文做详细描述。
控制电路连接信号单元40,用于根据信号单元40反馈的第一状态信号和第二状态信号识别当前推手部件20的位置,并相应调整电机的启动控制逻辑。本实施例中,控制电路包括主控制单元,主控制单元可以是具有分析、运算和控制功能的部件,比如:主控制单元可为但不限于PLC(Programmable Logic Controller译为可编程逻辑控制器)、ECU(Electronic Control Unit译为电子控制单元)或单片机等。主控制单元连接信号单元40,用于接收信号单元40反馈的状态信号,并根据状态信号对电机的运行进行控制。当主控制单元接收到第一状态信号,表明当前推手部件20处于工作位置区,主控制单元采用第一控制逻辑控制电机启动工作,当主控制单元接收到第二状态信号,主控制单元采用第二控制逻辑控制电机启动工作,第二控制逻辑不同于第一控制逻辑。可以理解的是,控制电路不仅包括主控制单元,还可以包括其他电路,例如开关控制电路、供电电路等任意一种电路或者多种电路的组合,本实施例中,控制电路可以理解为整机电路。
本实施例通过设置信号单元40检测推手部件20的位置,并设置控制电路根据信号单元40的检测结果,在推手部件20处于不同位置区时采用不同的控制逻辑控制电机13启动,以使推手部件20处于不同位置区时电机13的启动难度不同。当推手部件20处于非工作位置区时,控制电路采用第二控制逻辑控制电机启动,可以通过改变开关组件的动作顺序和/或延长开关组件被触发后的上电时间,使得相较于第一控制逻辑,在第二控制逻辑下电机更难启动,从而可以降低推书部件20在收纳状态下用户由于误触发开关组件导致电动工具误启动的概率,降低用户的使用风险,提高电动工具的安全性。
在一个实施例中,如图3所示,电动工具还包括上电开关11。上电开关11用于响应用户的操作被触发,以使控制电路在非激活状态和激活状态之间切换。当控制电路处于激活状态,控制电路允许电源12的电流流向电机13。当控制电路处于非激活状态,控制电路禁止电源12的电流流向电机13。电机启动开关15包括第一操作元件62,第一操作元件62用于响应用户操作被触发,输出电机启动信号。在第一控制逻辑和第二控制逻辑下,上电开关11的触发保持时间不同;和/或在第一控制逻辑和第二控制逻辑下,第一操作元件62的允许触发时间不同。
具体地,控制电路处于激活状态下,允许电源12的电流流向电机13可以理解为电源12至电机13的供电回路可以导通,但需要在一定条件下才能导通。本实施例中,电源12至电机13的供电回路可以由主控制单元14控制。当控制电路处于激活状态下,主控制单元14在接收到电机启动信号时才控制电源12至电机13的供电回路导通,以使电机13驱动工作部工作。而当控制电路处于非激活状态,主控制单元14配置为无法接收到电机启动信号,因此无法控制电源12至电机13的供电回路导通。或者,主控制单元14配置为即使接收到电机启动信号,也不会控制电源12至电机13的供电回路导通。
为了降低推手部件20处于非工作位置区时电机13的误启动概率,本实施例中,在第一控制逻辑和第二控制逻辑下,预先设置上电开关11的触发保持时间不同,使控制电路允许进入激活状态的时间不同,或预先设置第一操作元件62的允许触发时间不同,使主控制单元14允许接收电机启动信号的时间不同,或设置电开关11的触发保持时间和第一操作元件62的允许触发时间均不同。
其中,上电开关11的触发保持时间可以理解为上电开关11自被触发开始、保持触发状态直到控制电路由非激活状态切换到激活状态的时间。例如,上电开关11为按钮式开关,用户按压按钮式开关并保持按压状态直至达到预设的触发保持时间,控制电路才进入激活状态。或上电开关11为旋转式开关,用户旋转上电开关至预设角度,并将开关保持旋转在预设角度直至达到预设的触发保持时间,控制电路才进入激活状态。
第一操作元件62的允许触发时间可以理解为控制电路自进入激活状态起,主控制单元14允许接收电机启动信号的预设时间。其中,预设时间可以是预设时间段,也可以是固定时间点。例如,第一操作元件62可以是扳机,自控制电路进入激活状态起的10s内(也即预设时间段内),用户扳动扳机,可以控制电机13启动。或者自控制电路进入激活状态起的第10s(也即间隔预设时间的固定时间点),用户扳动扳机,才能控制电机13启动。
本实施例通过设置第一控制逻辑下和第二控制逻辑下控制电路响应上电开关11的触发保持时间不同,和/或响应第一操作元件62的允许触发时间不同,使得当推杆处于工作位置区,用户可以方便地触发上电开关11和第一操作元件62使电机13启动工作,当推杆处于非工作位置区内,提高上电开关11和电机启动开关15被触发的操作难度,降低电机13通电启动的概率,从而提高推手部件20处于收纳状态时电动工具的安全性。
第一控制逻辑和第二控制逻辑有多种实现方式,以下以几种示例为例进行说明。
作为第一种示例,如图3和图4所示,第一控制逻辑至少包括:上电开关11的触发保持时间达到第一保持时间,允许控制电路进入激活状态。第二控制逻辑至少包括:上电开关11的触发保持时间达到第二保持时间,允许控制电路进入激活状态。其中,第二保持时间大于第一保持时间。
具体地,控制电路包括计时单元16,控制电路根据计时单元16的计时时间判断上电开关11的触发保持时间是否满足预设条件(也即是否达到第一保持时间或第二保持时间)。当触发保持时间满足预设条件,允许控制电路进入激活状态。
本实施例中,计时单元16用于从上电开关11被触发的瞬间启动计时,并在计时时间达到预设的第一保持时间或第二保持时间时发送计时信号至主控制单元14,以使控制电路进入激活状态。
计时单元可以设置在主控制单元14外,并与主控制单元14连接,也可以集成在主控制单元14内。在一种情况下,计时单元16设置在主控制单元14外,如图3所示,计时单元16与上电开关11和第一操作元件62一起设置在控制电路的开关控制单元111上。当开关控制单元111检测到上电开关11被触发,开关控制单元111控制计时单元16启动计时,并在计时时间达到预设的第一保持时间或第二保持时间时,发送计时信号至主控制单元14。在另一种情况下,计时单元16也可以集成在主控制单元14内,上电开关11和电机启动开关15设置在开关控制单元111内,在上电开关11被触发的瞬间,开关 控制单元111控制电源12至主控制单元14的供电回路导通,主控制单元14上电并控制计时单元16启动计时,当计时时间达到预设的触发保持时间时,控制电路进入激活状态。
进一步地,为了方便用户获知控制电路已进入激活状态,本实施例还提供显示单元17,显示单元17连接开关控制单元111,并受开关控制单元111控制。当计时单元16的计时时间达到预设的第一保持时间或第二保持时间,开关控制单元111控制显示单元17点亮,以提示操作者控制电路进入激活状态,从而操作者可以在显示单元17点亮后触发第一操作元件62,以使电机启动。通过设置显示单元17,不仅可以在推手部件20处于工作位置区时,提示操作者何时可以操作电机启动开关,还可以在推手部件20处于非工作位置区时,提醒操作者当前整机控制电路已被激活,避免操作者进一步操作第一操作元件62导致电机误启动,可以进一步提高电动工具的安全性。
本示例中第二保持时间大于等于第一保持时间的3倍。优选地,第二保持时间大于等于第一保持时间的5倍。例如,第二保持时间可以是第一保持时间的3倍、5倍、20倍、50倍或100倍。第二保持时间越大,上电开关11需要被持续触发的时间越长,用户误触发的概率也越低。
具体地,第二保持时间大于等于2s,第一保持时间小于等于0.6s。例如,第一保持时间可以是0s、0.1s、0.3s、0.5s或0.6s等,第二保持时间可以是2s、5s、10s、15s、20s或30s等。示例性地,从用户的操作角度来看,当推手部件20处于工作位置区时,用户仅需触发上电开关0.3s后,即可使控制电路进入激活状态,而后用户再触发第一操作元件62即可控制电机13启动工作,从而可以方便地启动电动工具。而当推手部件20旋转至非工作位置区,用户需持续按压或旋转上电开关30s,才可使控制电路处于激活状态,然后再触发第一操作元件62才能控制电机13启动工作。对用户来说,通常开关的开启都是短暂的按压即可,因此,用户基本不会想到需要持续按压上电开关30s,才能使控制电路激活;并且,用户即使误触发上电开关,也不会长时间持续误触。而当推手部件20处于非工作位置区,用户习惯性的短暂触发上电开关11,是无法激活控制电路的。因此本实施例提供的方案可以降低用户由于误触发上电开关导致电机启动的概率,提高推手部件20折叠时的使用安全性。
上述实施例通过配置在第一控制逻辑下和第二控制逻辑下,上电开关11的触发保持时间不同,使得在第二控制逻辑下,电机误启动的概率更小。
作为第二种示例,第一控制逻辑至少包括:控制电路进入激活状态下,第一操作元件62的允许触发时间配置在第一预设时间内。第二控制逻辑至少包括:控制电路进入激活状态下,第一操作元件62的允许触发时间配置在第二预设时间内。
或者,第二控制逻辑包括:第一操作元件62的允许触发时间配置为从控制电路进入激活状态起,间隔预设时间的固定时间点,控制电路允许在固定时间点接收电机启动信号,以控制电源13的电流流向电机13,使电机13驱动工作部31工作。
具体地,当推手部件20处于工作位置区,操作者先触发上电开关11,使控制电路进入激活状态。从控制电路进入激活状态起,计时单元16启动计时,同时主控制单元14允许响应电机启动信号。当计时单元16的计时时间达到第一预设时间,计时单元16发送信号至主控制单元14,主控制单元14接收到计时信号后不再响应电机启动信号。
当推手部件20处于非工作位置区,操作者先触发上电开关11,使控制电路进入激活状态。从控制电路进入激活状态起,计时单元16启动计时,同时主控制单元14允许响应电机启动信号。当计时单元16的计时时间达到第二预设时间,计时单元16发送信号至主控制单元14,主控制单元14接收到计时信号后不再响应电机启动信号。
或者,当推手部件20处于非工作位置区,操作者先触发上电开关11,使控制电路进入激活状态。从控制电路进入激活状态起,计时单元16启动计时。当计时时间达到预设的固定时间点,计时单元16发送信号至主控制单元14,主控制单元14允许在该固定时间点响应电机启动信号,当计时时间未达到该时间点或计时时间超出该时间点,主控制单元14均不响应电机启动信号,也即主控制单元14无法接收到电机启动信号,或者即使接收到电机启动信号也不会控制电机13启动。
本示例中,第二预设时间小于第一预设时间。示例性地,第二预设时间小于等于第一预设时间的五分之一、十分之一或百分之一。例如,第二预设时间可以是第一预设时间的五分之一、十分之一。
具体地,第一预设时间大于等于30s,例如第一预设时间可以是30s、40s、50s或60s等。第二预 设时间大于等于0s,小于等于5s,例如第二预设时间可以是0s、0.2s、0.3s、0.5s、1s、2s、3s、4s或5s等。若第二预设时间大于5s,会提高用户误触发电机驱动开关的概率。
预设的固定时间点可以是自控制电路进入激活状态起第0.5s、第1s、第5s、第10s等。
也即,从用户的操作角度来看,当推手部件20处于工作位置区时,用户触发上电开关11使得控制电路进入激活状态起,在60s内,再触发电第一操作元件62,即可使电机13上电启动工作。而当推手部件20处于非工作位置区时,用户触发上电开关11使得控制电路进入激活状态起,在0.3s内触发第一操作元件62,或者自控制电路进入激活状态起的第3s触发第一操作元件62,才能使电机13启动工作。由此可见,当推手部件20处于工作位置区时,用户有足够的时间触发第一操作元件62,可以确保用户在想启动电机时能够启动。而当推手部件20处于非工作位置区时,对用户来说,几乎需要同时触发上电开关11和第一操作元件62才能使电机启动工作,或者在触发上电开关11后需计时,计时时间达到固定时间点后触发第一操作元件62才能使电机启动,通常,用户是按照正常速度先后触发上电开关11和第一操作元件62控制电机13启动,因此用户很难想到需要同时触发上电开关11和第一操作元件62才能使电机启动工作,从而大大降低了电机误启动的概率。
本示例通过在推杆处于非工作位置区时,改变第一操作元件62的允许触发时间,提高电机13启动难度,可以降低用户在推手部件20折叠过程中误启动电机13的概率,提高安全性能。
作为第三种示例,第一控制逻辑至少包括:上电开关11的触发保持时间达到第一保持时间,允许控制电路进入激活状态,控制电路进入激活状态下,允许在第一预设时间内接收电机启动信号。第二控制逻辑至少包括:上电开关11的触发保持时间达到第二保持时间,允许控制电路进入激活状态,控制电路进入激活状态下,允许在第二预设时间内接收电机启动信号。其中,第二保持时间大于第一保持时间,且第二预设时间小于第一预设时间。或者,第二启动逻辑包括:上电开关11的触发保持时间达到第二保持时间,允许控制电路进入激活状态,从控制电路进入激活状态起,在间隔预设时间的固定时间点处,控制电路允许接收电机启动信号。
具体地,当推手部件20处于工作位置区,操作者先触发上电开关11,开关控制单元111检测到上电开关11被触发的瞬间,控制计时单元16启动计时。当计时时间达到预设的第一保持时间,开关控制单元111发送计时信号至主控制单元14,此时,控制电路进入激活状态,主控制单元14允许响应电机启动信号。从计时时间达到预设的第一保持时间起,开关控制单元111再次控制计时单元16启动计时,当计时单元16的计时时间达到第一预设时间,计时单元16发送信号至主控制单元14,主控制单元14接收到计时信号后不再响应电机启动信号。
当推手部件20处于非工作位置区,操作者先触发上电开关11,开关控制单元111检测到上电开关11被触发的瞬间,控制计时单元16启动计时。当计时时间达到预设的第二保持时间,开关控制单元111发送计时信号至主控制单元14。此时,控制电路进入激活状态,主控制单元14允许响应电机启动信号。从计时时间达到预设的第二保持时间起,开关控制单元111再次控制计时单元16启动计时,当计时单元16的计时时间达到第二预设时间,计时单元16发送信号至主控制单元14,主控制单元14接收到计时信号后不再响应电机启动信号。或者,从计时时间达到预设的第二保持时间起,开关控制单元111再次控制计时单元16启动计时。当计时时间达到预设的固定时间点,计时单元16发送信号至主控制单元14,主控制单元14允许在该固定时间点响应电机启动信号。
优选地,第二保持时间大于等于第一保持时间的3倍;第二预设时间小于第一预设时间。具体地,第二保持时间大于等于2s,第一保持时间小于等于0.6s。第二预设时间大于等于0s,小于等于5s,第一预设时间大于等于30s。例如第一保持时间可以是0s、0.1s、0.3s、0.5s或0.6s等。第二保持时间可以是2s、5s、10s、15s、20s或30s等。第一预设时间可以是30s、40s、50s或60s等。第二预设时间可以是0s、0.2s、0.3s、0.5s、1s、2s、3s、4s或5s等。
优选地,预设的固定时间点可以是自第二保持时间达到起的第0.5s、第1s、第5s、第10s、第20s等。
也即,从用户的操作角度来看,当推手部件20处于工作位置区时,用户仅需触发上电开关0.3s后,在60s内在触发电机启动开关,即可控制电机启动。而当推手部件20处于工作位置区时,用户需持续按压或旋转上电开关30s,才能使控制电路激活,然后在控制电路激活的0.3s内触发第一操作元 件62,或者自控制电路进入激活状态起的第3s触发第一操作元件62,才能使电机13启动工作。对用户来说,连续触发上电开关11并保持一段时间不松手已是小概率事件,且连续触发上电开关11达到预设的触发保持时间后极短时间内再触发第一操作元件62的概率更低,因此本示例可以有效降低用户误触发上电开关11和第一操作元件62导致电机13启动的概率,提高折叠推手部件20时的操作安全性。
相较于第一种示例和第二种示例提供的方案,本示例通过在推杆处于非工作位置区时,既改变上电开关11的触发保持时间,又改变第一操作元件62的允许触发时间,可以进一步提高电机13启动难度,降低用户在推手部件20折叠过程中误启动电机13的概率,提高安全性能。
在一个实施例中,电动工具100包括手推割草机,手推割草机的电机包括切割电机,工作部包括切割部,切割电机用于驱动切割部运动,以执行切割工作。如图4所示,针对切割电机,第一操作元件62可以是切割拉杆621,切割拉杆与推手部件20的推杆21平行,用于供用户拉动。当用户需要控制切割电机启动时,可以先触发设置于开关控制单元111上的上电开关11,并持续触发达到预设的触发保持时间,使控制电路进入激活状态。当控制电路进入激活状态,显示单元17点亮,从而提示用户可以操作切割拉杆。当切割拉杆在允许触发时间内被扳动至靠近推杆21,切割电机启动,以驱动切割部工作。
或者,电动工具的电机13包括自驱电机,工作部31包括移动组件,移动组件用于驱使主机10在设定的路径或工作区域内移动。如图4所示,针对自驱电机,第一操作元件62可以是自驱拉杆622,自驱拉杆622设置于推杆21处,且与推杆21和切割拉杆621平行。自驱拉杆622和切割拉杆621可以分别位于推杆21的两侧,以便于用户操作。当用户需要控制自驱电机启动时,可以先触发设置于开关控制单元111上的上电开关11,并持续触发达到预设的触发保持时间,使控制电路进入激活状态。当控制电路进入激活状态,显示单元17点亮,从而提示用户可以操作自驱拉杆622。当自驱拉杆在允许触发时间内被扳动至靠近推杆21,自驱电机启动,以驱动移动组件工作。
上述第一种示例、第二种示例和第三种示例描述的第一控制逻辑和第二控制逻辑对上电开关11的触发保持时间和第一操作元件62的允许触发时间的限定,均可应用于本实施例提供的切割电机或自驱电机。具体实施方式参考前述实施例,在此不再赘述。
前述实施例中,当需要启动切割电机或自驱电机时,用户执行两个开关触发动作(触发上电开关+触发第一操作元件),即可使电机启动。当电动工具为手推割草机时,具体的,当割草机供应用于商业场景时,例如园林团队携带割草机对多家园林进行割草,由于园林团队需要从一家花园转场至另一家花园工作,割草机需要装车运输随园林团队转场,因此运输工况较多,推手部件20的收纳工况也较多,因此电机误启动的概率较大,双触发动作启动电机难以满足商用工况下对电机启动的安全性要求。
基于此,在又一实施例中,如图4所示,电机启动开关15还包括解锁元件61。解锁元件61用于控制第一操作元件62在锁定状态和解锁状态之间切换。当第一操作元件62处于锁定状态,第一操作元件62无法响应用户操作输出电机启动信号,当第一操作元件62处于解锁状态,第一操作元件62可以响应用户操作输出第一操作电机启动信号。
具体地,在一个示例中,解锁元件61配置为机械操作件。机械操作件包括可操作地耦接到第一操作元件62的止挡件。当解锁元件61未被操作时,止挡件抵接第一操作元件62,使得第一操作元件62无法被操作以朝向推杆21运动,从而无法输出电机启动信号,此时第一操作元件62处于锁定状态。当解锁元件61被操作时,止挡件释放第一操作元件62,使得第一操作元件62可以被操作以朝向推杆21运动,此时第一操作元件62处于解锁状态,当第一操作元件62靠近推杆21时,第一操作元件62可以输出电机启动信号。因此本示例中,当需要启动电机时,用户需执行三个触发动作,也即先触发上电开关11,使控制电路进入激活状态;再在允许触发时间内,分别触发解锁元件61和第一操作元件62,以启动电机。
上述第一种示例、第二种示例和第三种示例提供的第一控制逻辑和第二控制逻辑中,对上电开关11的触发保持时间和第一操作元件62的允许触发时间的限定,均可应用于本实施例。也即,在第一控制逻辑下,控制电路进入激活状态后,用户需在第一预设时间内操作解锁元件61和第一操作元件62,以控制电机启动。在第二控制逻辑下,控制电路进入激活状态后,用户需在第二预设时间内操作解锁元件61和第一操作元件62,以控制电机启动。由于第二预设时间小于第一预设时间,且第二预设时间小 于等于5s,因此在第二控制逻辑下,用户很难短时间内操作两个元件,从而提高了电动工具在第二控制逻辑下的启动难度。
在又一个示例中,解锁元件61配置为电子开关,电子开关能够响应用户操作输出解锁信号。控制电路在接收到解锁信号后,才允许接收电机启动信号。也即,在本示例中,当需要控制电机启动时,用户需先触发上电开关11,使控制电路进入激活状态。然后触发解锁元件61,控制电路接收到解锁信号后,用户再触发第一操作元件62,才能控制电机启动。
上述第一种示例、第二种示例和第三种示例提供的第一控制逻辑和第二控制逻辑中,对上电开关11的触发保持时间和第一操作元件62的允许触发时间的限定,均可应用于本实施例。具体可参考上一实施例中解锁元件61为机械操作件的描述,在此不再赘述。
针对解锁元件61为电子开关的情况,在第一控制逻辑和第二控制逻辑下,还可以对解锁元件61的持续触发时间进行区别限制,以进一步提高第二控制逻辑下的电机启动的难度。
作为第四种示例,第一控制逻辑至少包括:控制电路进入激活状态下,解锁元件61自被触发开始直至向控制电路输出解锁信号的持续触发时间达到第三保持时间,控制电路允许接收电机启动信号,以根据电机启动信号控制电源的电流流向电机,以使电机驱动工作部工作。也即,当计时时间未达到第三保持时间,控制电路均不响应电机启动信号,也即均无法接收电机启动信号,或即使接收到电机启动信号也不控制电机启动。
第二控制逻辑至少包括:控制电路进入激活状态下,解锁元件61自被触发开始直至向控制电路输出解锁信号的持续触发时间达到第四保持时间,控制电路允许接收电机启动信号,以根据电机启动信号控制电源的电流流向电机,以使电机驱动工作部工作。其中第四保持时间大于第三保持时间,且第四保持时间大于等于第三保持时间的3倍。
具体地,如图4所示,解锁元件61可以设置在开关控制单元111上,解锁元件61可以是按钮式开关,当按钮式开关被按压,可以输出解锁信号至主控制单元14。主控制单元14接收到解锁信号,允许响应电机启动信号,以控制电机启动。主控制单元14未接收到解锁信号,禁止响应电机启动信号,此时即使用户操作第一操作元件61,也无法启动电机。
当推手部件20处于工作位置区,用户需先触发上电开关11,使控制电路进入激活状态。然后触发解锁元件61,并持续按压解锁元件61,开关控制单元111检测到解锁元件61被触发的瞬间,控制计时单元16启动计时,并在解锁元件61保持触发状态期间持续计时,直到计时时间达到预设的第三保持时间,开关控制单元111发送解锁信号至主控制单元14,以使主控制单元14允许接收电机启动信号。当主控制单元14接收到电机启动信号,控制电机启动。
当推手部件20处于非工作位置区,若要控制电机启动,需先触发上电开关11,使控制电路进入激活状态。然后触发解锁元件61,并持续按压解锁元件61,开关控制单元111检测到解锁元件61被触发的瞬间,控制计时单元16启动计时,并在解锁元件61保持触发状态期间持续计时,直到计时时间达到预设的第四保持时间,开关控制单元111发送解锁信号至主控制单元14,以使主控制单元14允许接收电机启动信号。当主控制单元14接收到电机启动信号,可以控制电机启动。
优选地,第四保持时间大于等于第三保持时间的三倍。示例性地,第四保持时间可以是第三保持时间的3倍、5倍、20倍、50倍或100倍。第四保持时间越大,解锁元件61需要被持续触发的时间越长,用户误触发的概率也越低。
具体地,第四保持时间大于等于2s,第三保持时间小于等于0.6s。例如,第三保持时间可以是0s、0.1s、0.3s、0.5s或0.6s等,第四保持时间可以是2s、5s、10s、15s、20s或30s等。由于第四保持时间远大于第三保持时间,因此当推手部件20处于非工作位置区,用户需要持续触发解锁元件61一段时间。对用户来说,通常短暂按压三个开关即可启动电机,因此用户不会想到在按压上电开关11后需要持续按压解锁元件61。即使用户误触开关,也不会长时间持续误触。因此本实施例提供的方案可以降低用户由于误触发上电开关和电机启动开关导致电机启动的概率,提高推手部件20折叠时的使用安全性。
或者,作为第五种示例,当推手部件20处于非工作位置区,可以不限制解锁元件61的触发保持时间,而是限制解锁元件61的允许触发时间以提高电机启动难度。本实施例中,第一控制逻辑可以与前 述第四种示例相同,第二控制逻辑至少包括:控制电路进入激活状态与控制电路接收到解锁信号之间间隔预设固定时间点。也即,控制电路允许接收解锁信号的计时起点为控制电路从进入激活状态起,当计时时间达到预设的固定时间点,控制电路允许在该固定时间点接收解锁信号,并在接收到解锁信号后,允许接收电机启动信号。
示例性地,预设的固定时间点可以是5s、10s、15s或20s等,从控制电路进入激活状态起间隔预设固定时间点即为,从控制电路进入激活状态起间隔5s、10s、15s或20s。也即,控制电路从进入激活状态起的第5s、第10s、第15s或第20s允许接收解锁信号,当计时时间未达到预设的间隔时间或超过预设的间隔时间,控制电路均不响应解锁信号,也即均无法接收解锁信号,或即使接收到解锁信号也不进行动作。
本实施例不限制第一控制逻辑下解锁元件61和第一操作元件62的允许触发时间,用户只要在触发主上电开关11后,依次触发解锁元件61和第一操作元件62,即可控制电机启动。而在第二控制逻辑下,通过限制在固定时刻允许接收解锁信号,可以提高电机启动难度,从而提高推手部件20处于收纳状态时电动工具的安全性。
进一步地,作为第六种示例,在第四种示例或第五种示例的基础上,在第一控制逻辑和第二控制逻辑下,不仅可以限制解锁元件61的触发保持时间或允许触发时间,还可以进一步限制第一操作元件62的允许触发时间,以进一步提高第二控制逻辑下电机的启动难度。
具体地,第一控制逻辑还包括:控制电路允许在第一预设时间内接收电机启动信号。其中,第一预设时间的计时起点即为解锁元件61的持续触发时间达到第三保持时间起。
第二控制逻辑还包括:控制电路允许在第二预设时间内接收电机启动信号,其中,第二预设时间的计时起点为解锁元件61的持续触发时间达到第四保持时间起,第二预设时间小于第一预设时间。
或者,第二控制逻辑包括:控制电路允许自接收到解锁信号起,在间隔预设时间的固定时间点接收电机启动信号。
示例性地,第二预设时间小于等于第一预设时间的五分之一、十分之一或百分之一。例如,第二预设时间可以是第一预设时间的五分之一、十分之一。
具体地,第一预设时间大于等于30s,第二预设时间大于等于0s,小于等于5s。例如,第一预设时间可以是30s、40s、50s或60s等。第二预设时间可以是0s、0.1s、0.2s、0.3s、0.4s或0.5s。若第二预设时间大于5s,会提高用户误触发第一操作元件的概率。预设的固定时间点可以是从计时时间达到第四保持时间起的第0.5s、第5s、第10s、第15s、第20s等。
本实施例在第二控制逻辑下不仅可以延长解锁元件61的触发保持时间,还缩短了第一操作元件62的允许触发时间,也即当推手部件20处于非工作位置区,用户需先触发主上电开关11,然后持续触发解锁元件61并保持一定时间,在持续触发时间达到的瞬间或在持续触发时间达到后的固定时间点触发第一操作元件62,才能控制电机启动,相较于上一实施例,本实施例提供的电机启动逻辑使得电机误启动的概率更低,可进一步提高电动工具的安全性。
进一步地,本实施例还可以设置第一控制逻辑下和第二控制逻辑下,上电开关11的触发保持时间不同,以进一步提高第二控制逻辑下电机误启动的概率。即第六种示例和第一种示例的组合。
其中,第一控制逻辑下,上电开关11的触发保持时间达到第一保持时间,控制电路允许接收解锁信号,并在接收到解锁信号时,控制电路判断解锁元件61保持触发状态的时间是否达到第三保持时间,达到第三保持时间时允许在第一预设时间内接收电机启动信号,且控制电路在接收到电机启动信号时控制电机启动。第一保持时间、第三保持时间和第一预设时间与前述实施例相同,在此不再赘述。
第二控制逻辑下,上电开关11的触发保持时间达到第二保持时间,控制电路允许接收解锁信号,并在接收到解锁信号时,控制电路判断解锁元件61保持触发状态的时间是否达到第四保持时间,达到第四保持时间时允许在第二预设时间内,或者控制电路允许自达到第四保持时间起,在间隔预设时间的固定时间点接收电机启动信号,并在接收到电机启动信号时控制电机启动。其中,第二保持时间大于第一保持时间,第四保持时间大于第三保持时间,第二预设时间小于第一预设时间。第二保持时间、第四保持时间和第二预设时间与前述实施例相同,在此不再赘述。
本实施例中,通过限制第一控制逻辑和第二控制逻辑下上电开关11的触发保持时间、解锁元件61 的持续触发时间和第一操作元件62的允许触发时间均不同,大大降低了推手部件20处于非工作位置区时,用户误操作开关组件使得电机启动的概率。通常来说,用户短暂按压三个开关即可启动电机,因此用户不会想到需要长时间触发上电开关11和解锁元件61。并且,连续误触发三个开关已是小概率事件,在进行第一个触发动作(上电开关11)和第二个触发动作(解锁元件61)时保持触发状态一定时间不松手的概率更小,并且在第二个触发动作结束后的短时间内或固定时间点触发第一操作元件的概率更小,在无意识情况下几乎不可能实现,因此本实施例提供的方案可提高推手部件20在收纳状态下开关组件误触发的难度,有效降低电机误启动的概率。
上述实施例提供的电动工具均包括上电开关11,上电开关11用于在被触发时使控制电路进入激活状态,在控制电路进入激活状态下,控制电路允许接收电机启动信号。
在又一种实施方式中,电动工具也可以不设置上电开关11,控制电路可以在电动工具接入电源12时即进入激活状态。
具体地,当电池包安装至电源安装部,控制电路响应电池包的接入而进入激活状态,此时电源12至主控制单元14的供电回路导通,主控制单元14上电,允许接收电机启动信号。为了提高电动工具的安全性,降低电机的误启动概率,电机启动开关包括解锁元件61和第一操作元件62,解锁元件61用于响应用户操作输出解锁信号,第一操作元件62用于响应用户操作输出电机启动信号,主控制单元14接收到解锁信号和电机启动信号时,控制电机启动。
当电动工具不具备上电开关11时,可通过如下控制逻辑,提高推手部件20处于非工作位置区的电机启动难度。
作为第七种示例,第一控制逻辑包括:控制电路进入激活状态下,解锁元件61自被触发开始直至向控制电路输出解锁信号的持续触发时间达到第三保持时间,控制电路允许接收电机启动信号,并根据接收到的电机启动信号控制电源的电流流向电机,以使电机驱动工作部工作。
第二控制逻辑包括:控制电路进入激活状态下,解锁元件61自被触发开始直至向控制电路输出解锁信号的持续触发时间达到第四保持时间,控制电路允许接收电机启动信号,并根据接收到的电机启动信号控制电源的电流流向电机,以使电机驱动工作部工作。第四保持时间大于第三保持时间,且第四保持时间大于等于第三保持时间的3倍。关于第三保持时间和第四保持时间的具体限定可参考上一实施例,本实施例不再赘述。
当然,也可以进一步限制第一操作元件62的允许触发时间,以进一步提高第二控制逻辑下电机的启动难度。
作为第八种示例,在第七种示例的基础上,第一控制逻辑还包括:控制电路允许在第一预设时间内接收电机启动信号。其中,第一预设时间的计时起点即为解锁元件61的触发保持时间达到第三保持时间起。
第二控制逻辑还包括:控制电路允许在第二预设时间内接收电机启动信号。其中,第二预设时间的计时起点即为解锁元件61的触发保持时间达到第四保持时间起,且第二预设时间小于第一预设时间。
或者,第二控制逻辑包括:控制电路允许自达到第四保持时间起,在间隔预设时间的固定时间点接收电机启动信号。
关于第一控制逻辑和第二控制逻辑的具体限定,可以参见前述实施例,在此不再赘述。
上述实施例中,电动工具为手推割草机,手推割草机可以同时包括切割电机和自驱电机,上述实施例提供的第一控制逻辑和第二控制逻辑可以应用于控制切割电机启动或控制自驱电机启动。
在一个实施例中,上述上电开关11和解锁元件61可以均为按钮式开关。按钮式开关可以是常开式开关,也可以是常闭式开关。针对常开式开关,开关被触发就闭合,被释放就断开;或针对常闭式开关,开关被触发就断开,被释放就闭合。因此控制电路会响应开关的触发动作产生电平跳变,当开关被持续触发时电平不变,当开关被释放时再次发生电平跳变。进而主控制单元14可以在电平跳变的起始时刻开始计时,并在电平不变时保持计时,从而可以判断开关保持触发状态的时间是否达到预设的保持时间。
上述实施例提供的电机启动控制方案,当推手部件20处于非工作位置区时,采用第二控制逻辑,虽然在第二控制逻辑下,用户操作开关组件使电机启动的难度很高,但也存在一定的启动概率。若电机被误启动,仍然存在安全风险。
基于此,在一个实施例中,当控制电路接收到第一状态信号时,允许电机至少按照第一转速启动工作,当控制电路接收到第二状态信号时,允许电机至少按照第二转速启动工作,第二转速小于等于第一转速的三分之一。特别的,这里的第一转速应该理解为电动工具正常工作下,电机的转速。
优选地,第二转速小于等于第一转速的五分之一。示例性地,第二转速可以是第一转速的三分之一、四分之一、五分之一或十分之一。
具体地,第一转速可以是2500r/min以上,例如2500r/min、3000r/min、3500r/min或4000r/min,第二转速可以是700r/min以下,例如700r/min、600r/min、300r/min或200r/min。由于第二转速远小于第一转速,从而即使电机驱动驱动工作部(例如刀片和移动组件)工作,也不会对用户造成太大伤害。
在一个实施例中,当控制电路接收到第二状态信号时,控制电路还用于在电机13启动预设时间后,控制电机13关闭。从而,即使用户在折叠推杆的过程中误操作导致电机13启动,控制电路也可以控制电机13在启动预设时间后关闭,防止对用户造成伤害。
本实施例中,预设时间小于等于5s。具体地,预设时间可以是2s、4s或5s。当预设时间超过5s,电机转动圈数过高,会带来安全隐患。
下面介绍本申请提供的调节部件50与推手部件20的联动结构。
如前所述,本申请提供的电动工具具有调节部件50,调节部件包括配接件51和调节件52,配接件51与调节件52配合实现推手部件20与主机10之间的位置调节。调节部件的实现方式有多种,以下以两种实施方式为例进行说明。
作为一个示例,请参考图5与图6,调节部件50包括配接件51和调节件52,配接件51连接主机10,调节件52连接推手部件20,配接件51与调节件52配合可以将推手部件20锁定于主机10,配接件51与调节件52解除配合,推手部件20可绕主机10旋转。
具体地,结合图7与图8,配接件51上具有第一位置511,调节件52上设有配合部521。当配合部521配接于第一位置511时,推手部件20处于工作位置区。当配合部521离开第一位置时,推手部件20处于非工作位置区。
调节部件50还包括驱使调节件52配接于配接件51或解除配接的操作组件53。操作组件53可沿配接件51的轴线514方向运动至解锁区域516。当调节件52与配接件51进行配接时,推手部件20锁定在第一位置511无法进行调节。当操作组件53沿轴线514运动至解锁区域516,调节件52从配接件51上解除配接,此时调节件52相对配接件51为活动状态,推手部件20能进行相应调节,如旋转调节等。其中,解锁区域516是指在轴线514方向上与配接件51表面具有一定的间距的平面区域,当然也可理解为与配接件51表面大致平行的平面区域。由于解锁区域516为平面区域,因此,调节件52可从第一位置511沿轴线514的方向移动至解锁区域516上;也可从配接件51的其他位置沿轴线514的方向移动至解锁区域516上。另外,解锁区域516与配接件51表面之间的间距可依据信号单元40的性能而定,比如:解锁区域516与配接件座51之间沿轴线514的方向上的间距为4mm等。当用户需要将推手部件20从工作位置区(第一位置)旋转至非工作位置区时,需先扳动操作组件53,以将推手部件20从第一位置511平移至解锁区域516,再旋转推手部件20,以旋转至非工作位置区。
具体地,参见图5-图8,配合部521配接第一位置511上有两种实现方式:一、配合部521直接配接在第一位置511上,即第一位置511上具有与配合部521连接的结构;二、配合部521位于第一位置511时,调节件52上其他位置与底座51上其他位置发生配接,比如:第一位置511设计为空白区域或凹槽结构,在空白区域或凹槽结构的周边设置若干齿;同时,配合部521的周边设置对应的齿进行啮合等。而不论是第一种方式,还是第二种方式,只需满足调节件52与配接件51配接后推手部件20无法进行调节均可。
当配合部521与第一位置511配接方式为第二种时,以第一位置511的周边设置若干齿为例,齿与第一位置511分别在配接件51上的分布有多种,比如:齿与第一位置511围绕轴线514外周分布;或者若干齿围绕轴线514间隔设置形成环状结构,第一位置511位于该环状结构内等。
请参考图7与图8,图7为配接件51的结构,图8为调节件52的结构,为了保证调节件52在解除配接后沿轴线514方向移动稳定,配接件51上设有具有轴线514的导向轴518。调节件52上设有滑 动套设在导向轴518外的轴套523。
在一些实施例中,请参考图7与图8,第一位置511包括至少两个档位区51a。全部档位区51a绕轴线514分布。当配合部521配接于任一档位区51a中时,推手部件20均处于工作位置区,且信号单元40向主控制单元14反馈第一状态信号。需要说明的是,档位区51a与档位区51a之间的调节可为:首先利用操作组件53将配合部521从其中一个档位区51a上解除配接并将其沿轴线514方向移动至解锁区域516上,此时调节件52为活动状态;转动调节件52使得配合部521对准另一个档位区51a;接着,利用操作组件53驱使配合部521配接在该档位区51a上,以完成档位区51a之间的调节。
在一些实施例中,请参考图7与图8,配接件51还具有与第一位置511绕轴线514间隔分布的第二位置512。当配合部521配接于第二位置512上时,推手部件20位于非工作位置区,此时推手部件20处于完全收纳状态。
进一步地,请参考图7与图8,配接件51上设有抵触部513。抵触部513位于第一位置511与第二位置512之间,当配合部521沿轴线514方向抵触在抵触部513上时,调节件52与配接件51解除配接。
需要说明的是,抵触部513与配合部521抵触时能阻止调节件52与配接件51之间配接,其实现方式有多种,比如:将抵触部513在轴线514方向上设计为高于第一位置511,使得配合部521抵触在抵触部513上时,调节件52其他部位均无法与底座51接触等;或者,将抵触部513设计为齿状结构,配合部521设计为不具有齿的凸起结构等。
在一些实施例中,请参考图2、图7及图8,配接件51还具有与第一位置511绕轴线514间隔分布的第三位置517。当配合部521配接于第三位置517上时,推手部件20位置非工作位置区,此时推手部件20处于中间收纳状态,且与电动工具100所在平面大致垂直。如此,当推手部件20与电动工具100所在平面大致垂直,即推手部件20基本处于竖直状态时,控制单元接收到第二状态信号,并启用第二控制逻辑。
需要说明的是,当电动工具100进行转场运输时,若将推手部件20处于完全收纳状态下,比如:推手部件20折叠在主机10上并与电动工具100所在平面大致平行,会增加电动工具100的整体长度,占用搬运空间。而将推手部件20设置中间收纳状态,与电动工具100所在平面大致垂直,比如:推手部件20与电动工具100所在平面之间夹角为70°~110°等,可减小电动工具100整体长度,方便转场搬运,提高转场效率。
在一些实施例中,请参考图9与图10,操作组件53包括连接于配接件51上轴线514处的导向件531、驱使导向件531沿轴线514的方向运动的操作件533、以及弹性件534。调节件52套设于导向件531上并位于配接件51与操作件533之间。操作件533切换至锁紧状态时,能驱使调节件52与底座51配接,操作件533切换至解锁状态时,弹性件534驱使调节件52与配接件51解除配接并运动至解锁区域516。
由此可知,当操作件533切换至锁紧状态时,驱使调节件52沿轴线514的方向压缩调节件52,使之与配接件51发生配接;当操作件533切换至解锁状态时,调节件52失去操作件533的驱动力,会在弹性件534的弹力下沿轴线514的方向反向运动至解锁区域516上,并与配接件51解除配接。
可选地,弹性件534可为弹簧、弹性橡胶、弹性金属片等。
进一步地,请参考图9与图10,操作件533包括转动连接于导向件531的凸轮部53b及连接于凸轮部53b的旋转部53a,凸轮部53b的圆周侧面与调节件52接触。由此可知,操作件533切换至锁紧状态时,通过旋转部53a转动凸轮部53b,使得凸轮部53b的圆周侧面上最突出点抵触在调节件52上,驱使调节件52朝向配接件51移动并与之配接;当操作件533切换至解锁状态时,通过旋转部53a转动凸轮部53b,使得凸轮部53b的圆周侧面上最突出点转离调节件52,使得调节件52在弹性件534的作用下与配接件51解除配接。
在一些实施例中,请参考图10,配接件51朝向调节件52的一侧面上设绕轴线514间隔分布的第一配接部515,调节件52上设有与第一配接部515啮合的第二配接部522。其中,第一配接部515与第二配接部522可有多种结构设计,比如:第一配接部515设计为槽状结构,第二配接部522设计为与之配合的凸状结构等。具体到一些实施例中,第一配接部515与第二配接部522均可为齿状结构。
本示例中,调节部件50采用磨盘结构,当需要调节推手部件20时,先将操作件533切换至解锁状 态,使调节件52与配接件51解除配接,再转动推手部件20。可以理解的是,调节部件50的结构不限于此,也可以采用其他构件。
作为又一个示例,调节部件50的结构可参考图11-图13,调节部件50包括连接于主机10的配接件54和连接于推手部件20的调节件55,调节件55用于调节推手部件20整体相对于主机10旋转或将推手部件20锁定于配接件54上以使推手部件20整体相对于主机10固定。
进一步地,调节件55包括调节手柄551和连接调节手柄551的销轴552。配接件54为连接主机10的底座,推手部件20和配接件54中的至少一个上设置有定位部56,调节手柄551用于带动销轴552沿销轴552的长度方向移动,以使销轴与定位部56配接或者解除与定位部56的配接。当销轴552与定位部56配接时,推手部件20相对于底座54固定。当销轴552与定位部56解除配接时,推手部件20可相对于底座54旋转,以便用户折叠推手部件20。
具体地,定位部56可以设置于底座54上,调节件55可以设置于主机10两侧的推杆21上。推杆21包括穿过推杆21的销孔,调节件55的销轴552与销孔配合,从而使调节件55配接至推杆21。销轴552部分伸出销孔外,以与底座54上的定位部56配接。当销轴552与定位部56解除配接、且全部收缩至销孔内时,推杆21可以绕主机10进行旋转。本实施例中,定位部56可以是定位孔,定位孔包括多个,可以分布于工作位置区和非工作位置区,以便推手部件20定位至工作位置区或非工作位置区的某些位置。如图11、图12和图13,根据定位孔分布的区域不同,定位孔可以包括工作区定位孔561和非工作区定位孔562/563。当销轴552与工作区定位孔561配接时,推杆21被固定于工作位置区。当销轴552与非工作区定位孔562/563配接时,推杆21被固定于非工作位置区。其中,工作区定位孔561可以有多个,多个工作区定位孔561沿推杆21的旋转弧线排布,以使推杆21定位在多个不同的挡位,使推杆可以适应不同身高的用户。非工作区定位孔562/563也可以有多个,本实施例中非工作位置区定位孔有两个分别为定位孔562和定位孔563,定位孔562用于将推杆定位于如图12的中间收纳状态,定位孔563用于将推杆定位于如图13的完全收纳状态。可以理解的是,还可以沿着推杆21的旋转弧线在定位孔562和定位孔563之间设置多个定位孔,以使推杆21可以定位在非工作位置区的多个位置上。当然,推手部件20在非工作位置区也可以不固定,也即定位孔只设置于工作位置区。
当然,定位部56也可以设置在主机10和推杆21上,也即推杆21上设置销孔,底座54上设置多个定位孔。当推杆21旋转至销孔与底座54上的其中一个定位孔同轴时,调节件55可拆卸地配接于定位孔和销孔内,以将推杆21定位至底座54。
下文介绍本申请提供的信号单元40根据推手部件20的位置反馈不同状态信号的配置形式。
在一个实施例中,信号单元40可以是机械触发开关。如图11-图13,信号单元40配置为微动开关43,微动开关43用于在推杆22旋转时,响应于推杆22位置的变化被触发或被释放,以输出不同的状态信号。推杆22连接于底座,微动开关43设置于底座54上,从而可以灵敏地响应推杆22的转动。微动开关43包括触发部和开关件,开关件受触发部控制,以在断开状态和接通状态之间切换。其中,微动开关处于断开状态或接通状态下,信号单元40择一地反馈第一状态信号或第二状态信号。
具体地,开关部连接主控制单元14,当触发部被触发时,主控制单元14可以检测到由于开关部通断状态的变化导致电路的电平跳变。开关部处于接通状态和断开状态时,电路反馈的电信号不同,例如,微动开关为常开开关时,触发部被触发,开关部从断开状态切换为接通状态,主控制单元14可以检测到电压信号由高电平跳变为低电平,触发部被释放,开关部处于从接通状态切换为断开状态,主控制单元14可以检测到电压信号由低电平跳变为高电平。当然,微动开关也可以为常闭开关。因此,主控制单元14通过检测电路的电平跳变,可以确定当前触发部是否被触发,进而确定推杆的位置,从而执行不同的电机启动逻辑。
作为一种示例,微动开关43为常开开关,且设置于推手部件20旋转区域的非工作位置区。更具体地,微动开关43设置推手部件20在非工作位置区的旋转路径上,使得推手部件20在非工作位置区内旋转时,均可以持续触发微动开关。如图12和图13所示,推手部件20处于中间收纳状态或完全收纳状态时,均会触发微动开关43。因此当推手部件20旋转至非工作位置区时,微动开关43被触发并反馈第二状态信号,主控制单元14接收到第二状态信号并执行第二控制逻辑。当推手部件20旋转至工作位置区,微动开关43被释放并反馈第一状态信号,主控制单元14接收到第一状态信号时执行第一控制 逻辑。
作为又一种示例,微动开关43为常开开关,且设置于推手部件20旋转区域的工作位置区。更具体地,微动开关43设置于推手部件20在工作位置区的旋转路径上,使得推手部件20在工作位置区旋转时,均可以持续触发微动开关。当推手部件20锁定于工作位置区的多个挡位上时,微动开关43均会被触发并反馈第一状态信号,主控制单元14接收到第一状态信号并执行第一控制逻辑。当推手部件20旋转至非工作位置区,微动开关43被释放并反馈第二状态信号,主控制单元14接收到第二状态信号时执行第二控制逻辑。
本实施例中,由于信号单元40为微动开关,通过设置微动开关的位置和微动开关的常开或常闭形式,可以使得只要推手部件20处于工作位置区内,无论推手部件20与主机10相对锁定还是解除锁定,微动开关均被释放,信号单元40均反馈第一状态信号,只要推手部件20处于非工作位置区内,无论推手部件20与主机10相对锁定还是解除锁定,微动开关均被触发,信号单元40均反馈第二状态信号。
在一个实施例中,信号单元40也可以是电气感应单元。请参考图5与图6,信号单元40配置为传感器,传感器包括第一部件41与第二部件42。第一部件41与第二部件42中的一个设于主机10上,另一个设于推手部件20或调节件52上。第一部件41被配置为根据感应第二部件42散发的信号强弱向控制单元反馈第一状态信号或第二状态信号。其中,感应的信号强弱与反馈的状态信号之间有两种设计,例如:感应的信号大于预设阈值时反馈第一状态信号,感应的信号小于等于预设阈值时反馈第二状态信号;或者,感应的信号小于等于预设阈值时反馈第一状态信号,感应的信号大于预设阈值时反馈第二状态信号。其中,感应信号可以是磁场强度、光感强度、压力大小等参数,信号单元40根据这些变化向主控制单元14输出对应的状态信号。
下面以感应的信号大于预设阈值时反馈第一状态信号,小于等于预设阈值时反馈第二状态信号为例进行说明。参考图5与图6,当调节部件50为磨盘齿结构,也即调节部件50包括配接件51、调节件52和操作件53时,第一部件41设置于主机上,第二部件42设置于推手部件20上。当调节件52上的配合部521配接在配接件51的第一位置511(也即工作位置区)时,第一部件41与第二部件42的距离较近,第一部件41感应到第二部件42所散发的信号大于预设阈值,从而第一部件41向主控制单元14发送第一状态信号。当用户操作操作件53,使得调节件52上的配合部521解除配接时,由于推手部件20或调节件52沿轴线514远离主机10,第二部件42的位置随推手部件20移动,使得第一部件41与第二部件42之间的距离变大,因此第一部件41感应到第二部件42所散发的信号小于等于预设阈值,第一部件41向主控制单元14发送第二状态信号。当调节件52进入非工作位置区,第二部件42的位置随推手部件20移动,使得第一部件41与第二部件42之间的距离持续增大,第一部件41感应到第二部件42所散发的信号持续减弱,向主控制单元14持续发送第二状态信号。因此,当推手部件20处于工作位置区且与主机相对锁定时,信号单元40反馈第一状态信号;当推手部件20处于工作位置区且与主机10解除锁定时,信号单元40反馈第二状态信号。当推手部件20处于非工作位置区时,信号单元40均反馈第二状态信号。
需要说明的是,第二部件42散发的信号可为磁场,比如:第二部件42为磁铁,第一部件41为霍尔元件。进一步地,当推手部件20处于工作状态时,第一部件41感应到第二部件42散发的信号强度大于或等于第一阈值。当推手部件20处于收纳状态时,第一部件41感应到第二部件42散发的信号强度小于或等于第二阈值,其中,第一阈值大于第二阈值。例如,参考图5,当配合部521配接在第一位置511(工作位置区)时,霍尔元件与磁铁距离较近,能感应较强的磁场,向控制单元发送高电平信号,如5V等;参考图6,当配合部521离开第一位置时,霍尔元件与磁铁距离较远,感应较弱的磁场,向控制单元发送低电平信号,如1.5V等。如此,通过设置合理的阈值,准确判断推手部件20所处的状态,以便主控制单元14获取相应的状态信号,合理控制功能部件30的启动延时时间。
在一些实施例中,请参考图14,第二部件42设于推手部件20或调节件52上,并在主机10上形成能使第一部件41向主控制单元14反馈第一状态信号的信号覆盖区44。当推手部件20在工作位置区内转动时,第二部件42在主机上形成的信号覆盖区44位置也随之变化,各信号覆盖区43之间重叠的部分定义重叠区域。当配合部521配接在各档位区51a内时,第一部件41位于重叠区域中。如此设计,不论配合部521配接在哪个档位区51a内,始终能保证第一部件41处于信号覆盖区44内,此时向主控 制单元14反馈的控制信号总为第一控制信号。
本实施例提供的信号单元以设置在第一示例中的调节部件为例进行说明,可以理解的是,上述实施例提供的两种信号单元,可以分别应用至具有前述两种调节部件的电动工具。
本实施例提供的电动工具,通过设置信号单元40,检测推手部件20的位置,并根据推手部件20的位置反馈不同的状态信号,控制电路根据不同的状态信号执行不同的电机启动逻辑,使得推手部件20处于工作位置区时,用户能够方便地控制电机启动,而当推手部件20处于非工作位置区时,用户操作开关组件启动电机的难度增大,电机误启动的概率降低,从而提高推手部件20处于非工作位置区时电动工具的安全性。
请参考图15,本申请提供上述实施例中的电动工具100的电机控制方法,其中,如图1所示,电动工具100包括主机10、推手部件20、调节件和配接件、信号单元40和电机14。推手部件20连接主机10,推手部件20可主机10旋转,推手部件20的旋转区域包括工作位置区和除工作位置区外的非工作位置区。当推手部件20处于工作位置区,推手部件20用于供用户操作以推动主机10移动。当调节件与配接件配合,推手部件20锁定于主机10,当调节件与配接件解除配合,推手部件20与主机10解除锁定,并可绕主机10旋转。功能部件包括电机13和工作部,电机用于驱使工作部在设定的路径或工作区域内移动,和/或执行切割任务。信号单元40用于响应推手部件20的位置变化反馈不同的状态信号,当推手部件20处于工作位置区、且推手部件20与主机10相对锁定,信号单元40反馈第一状态信号,当推手部件20处于非工作位置区,信号单元40反馈第二状态信号。电机14用于驱使电动工具在设定的路径或工作区内移动,和/或执行切割任务。关于电动工具的具体限定,可参考前述实施例1,在此不再赘述。
电机的控制方法由控制电路内的主控制单元执行,电机控制方法包括如下步骤:
步骤S100:接收信号单元40反馈的状态信号;
步骤S200:当状态信号为第一状态信号,根据第一控制逻辑控制电机14启动工作;
步骤S300:当状态信号为第二状态信号,根据第二控制逻辑控制电机14启动工作,其中,第二控制逻辑不同于第一控制逻辑。
在一个实施例中,电动工具100包括上电开关,上电开关用于响应用户操作被触发,以使控制电路在激活状态和非激活状态之间切换,当控制电路处于激活状态,控制电路允许电源的电流流向电机,当控制电路处于非激活状态,控制电路禁止电源的电流流向电机;上电开关自被触发开始、保持触发状态,直到控制电路由非激活状态切换到激活状态的时间定义为上电开关的触发保持时间。电机启动开关包括第一操作元件,第一操作元件用于响应用户操作输出电机启动信号,控制电路处于激活状态下且电机启动开关被触发,控制电路控制电源的电流流向电机,以使电机驱动工作部工作;控制电路进入所述激活状态,允许在预设时间内接收电机启动信号,其中,预设时间定义为电机启动开关的允许触发时间。
在第一控制逻辑和第二控制逻辑下,上电开关的触发保持时间不同;或第一控制逻辑和第二控制逻辑下,电机启动开关的允许触发时间不同;或第一控制逻辑和第二控制逻辑下,上电开关的触发保持时间和电机启动开关的允许触发时间均不同。
在一个实施例中,参考图16,步骤S200中,第一控制逻辑至少包括:
步骤S210:当状态信号为第一状态信号,判断上电开关的触发保持时间是否达到第一保持时间;
步骤S211:当达到第一保持时间,允许控制电路进入激活状态;
步骤S212:当未达到第一保持时间,禁止控制电路进入激活状态。
参考图17,步骤S300中,第二控制逻辑至少包括:
步骤S310:当状态信号为第二状态信号,判断主上电开关的触发保持时间是否达到第二保持时间;
步骤S311:当达到第二保持时间,允许控制电路进入激活状态;
步骤S312:当未达到第二保持时间,禁止控制电路进入激活状态,其中,第二保持时间不小于第一保持时间的3倍。优选地,第二保持时间大于等于2s。
上述实施例中,通过设置第一控制逻辑下和第二控制逻辑下,上电开关的触发保持时间不同,使得第二控制逻辑下,用户更难控制电机启动,提高了电动工具的安全性。
在一个实施例中,步骤S200中,第一控制逻辑至少包括:控制电路进入激活状态下,允许在第一预设时间内接收电机启动信号,并在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作。
步骤S300中,第二控制逻辑至少包括:控制电路进入激活状态下,允许在第二预设时间内接收电机启动信号,或自控制电路进入激活状态起,在间隔预设时间的固定时间点接收电机启动信号;并在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作,第二预设时间小于第一预设时间。
优选地,第二预设时间小于等于5s。
上述实施例中,通过设置第一控制逻辑下和第二控制逻辑下,第一操作元件的允许触发时间不同,使得第二控制逻辑下,用户更难控制电机启动,提高了电动工具的安全性。
可以理解的是,还可以同时设置上电开关的触发保持时间和电机启动开关的允许触发时间不同,具体实现方式可参见前述关于电动工具的实施例,在此不再赘述。
在又一实施例中,电机启动开关还包括解锁元件。解锁元件可以配置为机械操作件,机械操作件用于控制控制第一操作元件在锁定状态和解锁状态之间切换。机械操作件包括可操作地耦接到第一操作元件的止挡件,当解锁元件未被操作时,止挡件抵接第一操作元件,使得第一操作元件无法被操作以朝向推杆运动,从而无法输出电机启动信号,此时第一操作元件处于锁定状态。当解锁元件被操作时,止挡件释放第一操作元件,使得第一操作元件可以被操作以朝向推杆运动,且第一操作元件被触发可以输出电机启动信号,此时第一操作元件处于解锁状态。因此,在第二控制逻辑下,用户需在预设时间内触发解锁元件和第一操作元件,才能控制电机启动。
解锁元件也可以配置为电子开关,用于响应用户操作输出解锁信号。当解锁元件配置为电子开关时,第一控制逻辑下,控制电路配置为从进入激活状态起,在第一预设时间内接收解锁信号和电机启动信号。第二控制逻辑下,控制电路配置为从进入激活状态起,在第二预设时间内接收解锁信号和电机启动信号,其中第二预设时间小于第一预设时间。通过将电机启动开关配置为两个,且在第二控制逻辑下,缩短控制电路接收两个开关信号的时间,从而提高第二控制逻辑下电机的启动难度,提高推手部件处于收纳状态下电动工具的安全性。
在一个实施例中,当解锁元件为电子开关时,还可以限制解锁元件的触发保持时间,以提高电动工具的安全性。
具体地,第一控制逻辑至少包括:控制电路进入激活状态下,判断解锁元件自被触发开始、保持触发状态的持续触发时间是否达到第三保持时间;达到第三保持时间,允许接收电机启动信号,在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作。
第二控制逻辑至少包括:控制电路进入激活状态下,判断解锁元件自被触发开始、保持触发状态的持续触发时间是否达到第四保持时间;达到第四保持时间,允许接收电机启动信号,并在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作;其中,第四保持时间大于第三保持时间,且第四保持时间大于等于第三保持时间的3倍。由于第四保持时间大于第三保持时间,从而在第二控制逻辑下,用户需要长时间触发解锁元件,才能使控制电路允许接收电机启动信号。对于用户来说,正常工作状态下,只要短时间触发解锁元件,然后再触发第一操作元件即可控制电机启动。因此当推手处于收纳状态时,用户很难想到在需要长时间触发解锁元件,再触发第一操作元件才能使电机启动。即使用户误触发解锁元件,也不会长时间误触发,从而可以提高电动工具的使用安全性。
在又一实施例中,当解锁元件为电子开关时,第二控制逻辑还包括:控制电路进入激活状态下,允许在从控制电路进入激活状态起,间隔预设时间的固定时间点接收解锁信号。也即,在第二控制逻辑下,限制只能在控制电路进入激活状态后的固定时刻触发解锁元件才能接收到解锁信号,当时间未达到该固定时刻或超过该固定时刻,控制电路均不允许接收解锁信号。在正常工作状态下,用户在触发上电开关后的一段时间内均可以触发解锁元件。因此当推手处于收纳状态时,用户很难想到需要在固定时刻触发解锁元件才有效,即使用户误触发,但在固定时刻误触发的概率也很低。因此本实施例提供的方案可以提高电动工具的使用安全性
在一个实施例中,由于电机启动开关包括解锁元件和第一操作元件,因此不仅可以限制解锁元件的 持续触发时间,还可以限制第一操作元件的允许触发时间以进一步提高第二控制逻辑下电机的启动难度。
具体地,第一控制逻辑还包括:解锁元件自被触发开始、保持触发状态的持续触发时间达到第三保持时间,允许在第一预设时间内接收电机启动信号。
第二控制逻辑还包括:解锁元件自被触发开始、保持触发状态的持续触发时间达到第四保持时间,允许在第二预设时间内接收电机启动信号,第二预设时间小于第一预设时间。具体地,第二预设时间小于等于5s,第一预设时间大于等于30s。
或第二控制逻辑还包括:解锁元件自被触发开始、保持触发状态的持续触发时间达到第四保持时间,允许在与达到第四保持时间、间隔预设时间的固定时间点接收电机启动信号。其中,预设时间可以是达到第四保持时间后的第5s、第10s、第15s或第20s。
在一个实施例中,电动工具也可以不设置上电开关11,控制电路可以在电动工具插入电源12时即进入激活状态。具体地,电动工具还包括电源安装部,电源安装部用于可拆卸地安装电源,电源包括电池包,控制电路响应所述电池包安装至电池包安装部,进入激活状态。控制电路包括电机启动开关,电机启动开关包括解锁元件和第一操作元件,解锁元件用于响应用户触发输出解锁信号,第一操作元件用于响应用户触发输出电机启动信号。
在此基础上,第一控制逻辑至少包括:控制电路进入激活状态下,判断解锁元件自被触发开始直至向控制电路输出解锁信号的持续触发时间是否达到第三保持时间;达到第三保持时间,允许接收电机启动信号,在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作。
第二控制逻辑至少包括:控制电路进入激活状态下,判断解锁元件自被触发开始直至向控制电路输出解锁信号的持续触发时间是否达到第四保持时间;达到第四保持时间,允许接收电机启动信号,在接收到电机启动信号时,控制自电源的电流流向电机,以使电机驱动工作部工作;其中,第四保持时间大于第三保持时间,且第四保持时间大于等于第三保持时间的3倍。
进一步地,第一控制逻辑还包括:自解锁元件自被触发开始直至向控制电路输出解锁信号的持续触发时间达到第三保持时间起,允许在第一预设时间内接收电机启动信号。
第二控制逻辑还包括:自解锁元件自被触发开始直至向控制电路输出解锁信号的持续触发时间达到第四保持时间起,允许在第二预设时间内接收电机启动信号,第二预设时间小于第一预设时间;或自解锁元件自被触发开始、保持触发状态的时间达到第四保持时间起,允许在间隔预设时间的固定时间点接收电机启动信号。
在一个实施例中,控制方法还包括:当接收到第一状态信号时,允许电机启动时的转速为第一转速;当接收到第二状态信号时,允许电机启动时的转速为第二转速,第二转速小于等于第一转速的三分之一。优选地,第二转速小于等于第一转速的五分之一。
在一个实施例中,控制方法还包括:控制电机以第二转速运转预设时间后停机,预设时间小于等于5s。
关于上述控制方法的具体限定参见前述实施例中对电动工具的限定,在此不再赘述。上述控制方法通过采集推手部件处于不同位置时信号单元反馈的状态信号,根据不同的状态信号执行不同的启动逻辑,使得推手部件处于收纳状态时,降低电动工具误启动的概率,从而降低用户的使用风险,提高电动工具的安全性。
如图1所示,本申请的第三个实施例提供一种电动工具100,包括主机10、推手部件20、调节件52和配接件51、功能部件、信号单元40和控制电路。推手部件20连接主机10,推手部件20可绕推手部件20与主机10的连接点、相对于主机10旋转,推手部件20的旋转区域包括工作位置区和除工作位置区外的非工作位置区。当推手部件20处于工作位置区,推手部件20用于供用户操作以推动主机10移动。调节件52和配接件51用于调节推手部件20的位置,当调节件52与配接件51配合,推手部件20锁定于主机10,当调节件52与配接件51解除配合,推手部件20与主机10解除锁定,并可绕主机10旋转。功能部件包括电机13和工作部,电机用于驱使工作部在设定的路径或工作区域内移动,和/或执行切割任务。信号单元40用于响应推手部件20的位置变化反馈不同的状态信号,当推手部件20 处于工作位置区、且推手部件20与主机10相对锁定时,信号单元40反馈第一状态信号,当推手部件20处于非工作位置区,信号单元40反馈第二状态信号。控制电路接收推手部件20反馈的状态信号,并控制电机13启动时的工作转速。当控制电路接收到第一状态信号,允许电机13按照第一转速启动工作,当控制电路接收到第二状态信号,允许电机13按照第二转速启动工作,第二转速不大于第一转速的三分之一。
在一个实施例中,当电机13以第二转速运转时,主控制单元14还用于控制电机13在运转预设时间后停机,其中预设时间小于5s。通过控制电机13运转预设时间后停机,可以进一步减小安全风险。
在一个实施例中,主控制单元14还用于根据状态信号调整对电机13的启动启动逻辑。当主控制单元接14收到第一状态信号,采用第一控制逻辑控制电机13启动工作,当主控制单元14接收到第二状态信号,采用第二控制逻辑控制电机启动工作,第二控制逻辑不同于第一控制逻辑。
关于上述电动工具的具体限定,可以参件前述实施例对电动工具的限定,在此不再赘述。上述实施例提供的电动工具100,当推手部件20处于工作位置区和非工作位置区时,允许电机13启动的转速不同,通过将推手部件20处于非工作位置区时降低电机13的启动转速,即使用户在折叠推杆的过程中误启动电机13,也不会对用户造成伤害,从而降低了用户的使用风险,提高了电动工具100的安全性。
本申请的又一实施例提供一种电动工具的控制方法,该控制方法基于上述实施例提供的电动工具。该方法由控制电路中的主控制单元执行,如图18所示,控制方法包括以下步骤:
步骤S400:判断接收到的状态信号的类型;
步骤S500:当接收到第一状态信号时,允许电机按照第一转速启动工作;
步骤S600:当接收到第二状态信号时,允许电机按照第二转速启动工作,其中,第二转速不大于第一转速的三分之一。
优选地,第二转速不大于第一转速的五分之一。
在一个实施例中,控制方法还包括:控制电机按照第二转速运转预设时间后,控制电机停机。其中,预设时间小于等于5s。
关于上述控制方法的具体限定参见前述实施例对电动工具的限定,在此不再赘述。上述实施例提供的电动工具100,当推手部件20处于工作位置区和非工作位置区时,允许电机13启动的转速不同,通过将推手部件20处于非工作位置区时降低电机13的启动转速,即使用户在折叠推杆的过程中误启动电机13,也不会对用户造成伤害,从而降低了用户的使用风险,提高了电动工具100的安全性。
本申请的又一实施例提供一种电动工具,包括:主机;推手部件,连接主机,推手部件可绕推手部件与主机的连接点、相对于主机进行旋转运动,推手部件的旋转区域包括工作位置区和除工作位置区外的非工作位置区,当推手部件处于工作位置区,推手部件用于供用户操作以推动主机移动。调节件和配接件,当调节件与配接件配合,推手部件锁定于主机,调节件与配接件解除配合,推手部件与主机解除锁定,并可绕主机旋转。信号单元,信号单元用于响应推手部件的位置变化反馈不同的状态信号,当推手部件处于工作位置区且推手部件与主机相对锁定时,信号单元反馈第一状态信号,当推手部件处于非工作位置区,信号单元反馈第二状态信号。功能部件,包括电机和工作部,电机用于驱使工作部在设定的路径或工作区内移动,和/或执行切割任务。控制单元,用于接收信号单元反馈的状态信号,并根据状态信号调整对电机的启动启动逻辑。当控制单元接收到第一状态信号,控制单元采用第一控制逻辑控制电机启动工作,当控制单元接收到第二状态信号,控制单元采用第二控制逻辑控制电机启动工作,第二控制逻辑不同于第一控制逻辑。控制单元还用于当接收到第一状态信号时,允许电机按照第一转速启动工作,当接收到第二状态信号时,允许电机按照第二转速启动工作,第二转速小于第一转速,且第二转速小于等于第一转速的三分之一。
优选地,第二转速小于等于第一转速的五分之一。
关于上述电动工具的具体限定参见前述实施例对电动工具的限定,在此不再赘述。上述实施例提供的电动工具,当推手部件处于工作位置区和非工作位置区时,信号单元反馈不同的状态信号,控制单元根据不同的状态信号执行不同的启动逻辑,使得推手部件处于收纳状态时电机更难启动,降低电动工具 误启动的概率,从而降低用户的使用风险。即使电机启动,推手部件处于不同位置时,控制单元允许电机启动的转速不同,通过将推手部件处于非工作位置区时降低电机的启动转速,即使用户在折叠推杆的过程中误启动电机,也不会对用户造成伤害,从而降低了用户的使用风险,提高了电动工具的安全性。
以上实施例的各技术特征可以进行任意的组合,为使描述简洁,未对上述实施例中的各个技术特征所有可能的组合都进行描述,然而,只要这些技术特征的组合不存在矛盾,都应当认为是本说明书记载的范围。
以上实施例仅表达了本发明的几种实施方式,其描述较为具体和详细,但并不能因此而理解为对发明专利范围的限制。应当指出的是,对于本领域的普通技术人员来说,在不脱离本发明构思的前提下,还可以做出若干变形和改进,这些都属于本发明的保护范围。因此,本发明专利的保护范围应以所附权利要求为准。
在本发明的描述中,需要理解的是,术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。
此外,术语“第一”、“第二”仅用于描述目的,而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此,限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本发明的描述中,“多个”的含义是至少两个,例如两个,三个等,除非另有明确具体的限定。
在本发明中,除非另有明确的规定和限定,术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或成一体;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通或两个元件的相互作用关系,除非另有明确的限定。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。
在本发明中,除非另有明确的规定和限定,第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触,或第一和第二特征通过中间媒介间接接触。而且,第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方,或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方,或仅0仅表示第一特征水平高度小于第二特征。
需要说明的是,当元件被称为“固定于”或“设置于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的,并不表示是唯一的实施方式。

Claims (18)

  1. 一种电动工具,其特征在于,包括:
    主机;
    功能部件,包括工作部和驱动所述工作部工作的电机;
    电机启动开关,响应用户的操作控制所述电机;
    推手部件,连接所述主机,所述推手部件可绕所述主机旋转,所述推手部件的旋转区域包括工作位置区和非工作位置区,当所述推手部件处于所述工作位置区,所述推手部件与所述主机相对固定,用于供用户操作以推动所述主机移动;
    调节件和配接件,当所述调节件与所述配接件配合,所述推手部件锁定于所述主机,当所述调节件与所述配接件解除配合,所述推手部件与所述主机解除锁定,并可绕所述主机旋转;
    信号单元,用于响应所述推手部件的位置变化反馈不同的状态信号,当所述推手部件处于所述工作位置区且所述推手部件锁定于所述主机时,所述信号单元反馈第一状态信号,当所述推手部件处于所述非工作位置区,所述信号单元反馈第二状态信号;
    控制电路,用于接收所述信号单元反馈的所述状态信号,并根据接收到的不同的所述状态信号调整启动所述电机的控制逻辑;
    当所述控制电路接收到所述第一状态信号,所述控制电路按照第一控制逻辑控制所述电机启动工作,当所述控制电路接收到所述第二状态信号,所述控制电路按照第二控制逻辑控制所述电机启动工作,所述第二控制逻辑不同于所述第一控制逻辑。
  2. 根据权利要求1所述的电动工具,其特征在于,所述电动工具包括上电开关,所述上电开关响应用户的操作被触发,以使所述控制电路在非激活状态和激活状态之间切换,当所述控制电路处于所述激活状态,所述控制电路允许电源的电流流向所述电机,当所述控制电路处于所述非激活状态,所述控制电路禁止所述电源的电流流向所述电机,其中所述上电开关自被触发开始到所述控制电路由所述非激活状态切换到所述激活状态的时间定义为所述上电开关的触发保持时间;
    所述电机启动开关包括第一操作元件,所述第一操作元件响应用户操作输出电机启动信号,所述控制电路处于所述激活状态下且所述第一操作元件被触发,所述控制电路控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作,其中所述控制电路进入所述激活状态,允许在预设时间接收所述电机启动信号,所述预设时间定义为所述第一操作元件的允许触发时间;
    在所述第一控制逻辑和所述第二控制逻辑下,所述上电开关的触发保持时间不同;和/或
    在所述第一控制逻辑和所述第二控制逻辑下,所述第一操作元件的允许触发时间不同。
  3. 根据权利要求2所述的电动工具,其特征在于,所述控制电路还包括计时单元,以使所述控制电路根据所述计时单元的计时时间判断所述上电开关的触发保持时间是否满足预设条件,和/或
    所述控制电路还包括计时单元,以使所述控制电路根据所述计时单元的计时时间判断所述第一操作元件的允许触发时间是否满足预设条件。
  4. 根据权利要求2所述的电动工具,其特征在于,所述第一控制逻辑至少包括:所述上电开关的触发保持时间达到第一保持时间,允许所述控制电路进入所述激活状态;
    所述第二控制逻辑至少包括:所述上电开关的触发保持时间达到第二保持时间,允许所述控制电路进入所述激活状态;
    其中,所述第二保持时间大于所述第一保持时间,且所述第二保持时间大于等于所述第一保持时间的3倍。
  5. 根据权利要求2或4所述的电动工具,其特征在于,所述第一控制逻辑还包括:所述控制电路进入所述激活状态下,所述第一操作元件的允许触发时间配置在第一预设时间内,且所述控制电路在所述第一预设时间内接收到所述电机启动信号,控制所述电源的电流流向所述电机,使所述电机驱动所述工作部工作;
    所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,所述第一操作元件的允许触发时间配置在第二预设时间内,且所述控制电路在所述第二预设时间内接收到所述电机启动信号,控制所述电源的电流流向所述电机,使所述电机驱动所述工作部工作;
    其中所述第二预设时间小于所述第一预设时间。
  6. 根据权利要求5所述的电动工具,其特征在于,所述第二保持时间大于等于2s;所述第二预设时间小于等于5s。
  7. 根据权利要求2或4所述的电动工具,其特征在于,所述第二控制逻辑至少包括:所述第一操作元件的允许触发时间配置为与所述控制电路进入所述激活状态间隔预设固定时间点,所述控制电路允许在所述固定时间点接收所述电机启动信号,以控制所述电源的电流流向所述电机,使所述电机驱动所述工作部工作。
  8. 根据权利要求5所述的电动工具,其特征在于,所述电机启动开关还包括解锁元件,所述解锁元件配置为响应用户操作输出解锁信号;
    所述第一控制逻辑至少包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到所述解锁信号的持续触发时间达到第三保持时间,所述控制电路允许接收所述电机启动信号,以根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;
    所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到所述解锁信号的持续触发时间达到第四保持时间,所述控制电路允许接收所述电机启动信号,以根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;
    所述第四保持时间大于所述第三保持时间,且所述第四保持时间大于等于所述第三保持时间的3倍。
  9. 根据权利要求2所述的电动工具,其特征在于,所述电机启动开关还包括解锁元件,所述解锁元件配置为响应用户操作输出解锁信号,所述控制电路在接收到所述解锁信号后,允许接收所述电机启动信号;
    所述第二控制逻辑至少包括:所述控制电路进入所述激活状态下,所述控制电路进入激活状态与所述控制电路接收到所述解锁信号之间间隔预设固定时间点。
  10. 根据权利要求1所述的电动工具,其特征在于,所述电动工具还包括电源安装部,用于安装电源,所述电源包括电池包,所述电池包可拆地连接到所述电源安装部以给所述电动工具供电,所述控制电路响应所述电池包安装至所述电源安装部而进入激活状态;
    所述电机启动开关包括解锁元件和第一操作元件,所述解锁元件响应用户操作输出解锁信号,所述第一操作元件响应用户操作输出电机启动信号;
    所述第一控制逻辑还包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到所述解锁信号的持续触发时间达到第三保持时间,所述控制电路允许接收所述电机启动信号,并根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;
    所述第二控制逻辑还包括:所述控制电路进入所述激活状态下,所述解锁元件自被触发开始直至所述控制电路接收到所述解锁信号的持续触发时间达到第四保持时间,允许所述控制电路接收所述电机启动信号,并根据所述电机启动信号控制所述电源的电流流向所述电机,以使所述电机驱动所述工作部工作;
    所述第四保持时间大于所述第三保持时间,且所述第四保持时间大于等于所述第三保持时间的3倍。
  11. 根据权利要求10所述的电动工具,其特征在于,所述第一控制逻辑还包括:所述控制电路允许在第一预设时间内接收所述电机启动信号;
    所述第二控制逻辑还包括:所述控制电路允许在第二预设时间内接收所述电机启动信号,所述第二预设时间小于所述第一预设时间;或
    所述第二控制逻辑还包括:所述控制电路允许自达到所述第四保持时间起,间隔预设固定时间点接收所述电机启动信号。
  12. 根据权利要求1述的电动工具,其特征在于,当所述信号单元反馈所述第一状态信号时,所述 控制电路允许所述电机至少按照第一转速启动工作;
    当所述信号单元反馈所述第二状态信号时,所述控制电路允许所述电机至少按照第二转速启动工作,所述第二转速不大于所述第一转速的三分之一。
  13. 根据权利要求12所述的电动工具,其特征在于,所述控制电路还控制所述电机以所述第二转速运转预设时间后停止转动,所述预设时间小于等于5s。
  14. 根据权利要求1所述的电动工具,其特征在于,所述电动工具为手推割草机;
    所述电机包括切割电机,所述工作部包括切割刀片,所述切割电机用于驱动所述切割刀片运动,以执行切割工作;和/或
    所述电机包括自驱电机,所述工作部包括移动组件,所述自驱电机用于驱动所述移动组件移动,以带动所述主机移动。
  15. 根据权利要求1所述的电动工具,其特征在于,所述信号单元配置为微动开关,所述微动开关包括触发部和开关件,所述开关件受所述触发部控制,所述微动开关响应所述推手部件在所述工作位置区和所述非工作位置区之间变化在断开状态和接通状态之间切换,其中,所述微动开关处于所述断开状态或所述接通状态下,所述信号单元择一地反馈所述第一状态信号或所述第二状态信号。
  16. 根据权利要求1所述的电动工具,其特征在于,所述信号单元配置为传感器,所述传感器包括第一部件和第二部件,所述第一部件和所述第二部件中的一个设置于所述主机上,另一个设置于所述推手部件或所述调节件上,所述第一部件被配置为根据感应所述第二部件散发的信号强弱向所述控制电路反馈所述第一状态信号或所述第二状态信号。
  17. 一种电动工具,其特征在于,包括:
    主机;
    功能部件,包括工作部和驱动所述工作部工作的电机;
    电机启动开关,响应用户的操作控制所述电机;
    推手部件,连接所述主机,所述推手部件可绕所述主机旋转,所述推手部件的旋转区域包括工作位置区和非工作位置区,当所述推手部件处于所述工作位置区,所述推手部件与所述主机相对固定,用于供用户操作以推动所述主机移动;
    调节件和配接件,当所述调节件与所述配接件配合,所述推手部件锁定于所述主机,当所述调节件与所述配接件解除配合,所述推手部件与所述主机解除锁定,并可绕所述主机旋转;
    信号单元,所述信号单元用于响应所述推手部件的位置变化反馈不同的状态信号,当所述推手部件处于所述工作位置区且所述推手部件与所述主机相对锁定,所述信号单元反馈第一状态信号,当所述推手部件处于所述非工作位置区,所述信号单元反馈第二状态信号
    控制电路,用于接收所述信号单元反馈的所述状态信号,当所述控制电路接收到所述第一状态信号时,允许所述电机至少按照第一转速启动工作,当所述控制单元接收到所述第二状态信号时,允许所述电机至少按照第二转速启动工作,所述第二转速小于等于所述第一转速的三分之一。
  18. 根据权利要求17所述的电动工具,其特征在于,所述控制电路还用于控制所述电机以所述第二转速运转预设时间后停止转动,所述预设时间小于等于5s。
PCT/CN2023/116056 2022-08-31 2023-08-31 电动工具 WO2024046411A1 (zh)

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CN104541737A (zh) * 2013-10-10 2015-04-29 南京德朔实业有限公司 园林工具
CN107836211A (zh) * 2016-09-20 2018-03-27 苏州宝时得电动工具有限公司 电动工具及其防误启控制方法
JP2019097396A (ja) * 2017-11-28 2019-06-24 京セラインダストリアルツールズ株式会社 芝刈り機
CN113303073A (zh) * 2020-02-10 2021-08-27 创科无线普通合伙 联接到机具的手柄的控制组件
CN114765431A (zh) * 2020-12-30 2022-07-19 南京泉峰科技有限公司 自行走设备及其控制方法

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CN104541737A (zh) * 2013-10-10 2015-04-29 南京德朔实业有限公司 园林工具
CN107836211A (zh) * 2016-09-20 2018-03-27 苏州宝时得电动工具有限公司 电动工具及其防误启控制方法
JP2019097396A (ja) * 2017-11-28 2019-06-24 京セラインダストリアルツールズ株式会社 芝刈り機
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