Power tool and control method therefor

Abstract

The present application belongs to the technical field of electromechanics. Provided are a power tool and a control method therefor. The power tool comprises a housing, an output shaft, a driving mechanism, a clutch mechanism, a torque adjustment mechanism, a locking mechanism configured to selectively lock the torque adjustment mechanism, and a calibration mechanism, wherein the calibration mechanism comprises a magnetic component and a magnetic induction component, the magnetic component being disposed on the torque adjustment mechanism, and the magnetic induction component being disposed on the housing. When the power tool enters a torque adjustment mode, a controller acquires positioning parameters generated by the calibration mechanism, in response to an electric motor rotating by a preset angle or for a preset time. The controller is further configured to control the power tool to stop according to the positioning parameters, such that the locking mechanism can lock the torque adjustment mechanism. In the present application, the torque adjustment mechanism can quickly and accurately reach a preset position at which the torque adjustment mechanism can be locked by the locking mechanism, without repeated attempts, thereby improving convenience during torque adjustment of the power tool, and optimizing user experience.

Description

A power tool and a power tool control method Technical Field

[0001] This application relates to the field of electromechanical technology, and in particular to an electric tool and an electric tool control method. Background Technology

[0002] Different types of power tools are used in various industries. Among them, clutch-type torque tools are a common type of tool. Their main feature is that the torque can be set and is adjustable. They are mainly used in the steel structure installation industry, specifically for installing high-strength bolts in steel structures.

[0003] Torque adjustment in known clutch-type torque control tools is achieved either through manual adjustment using external tools or by installing sensor devices. Generally, torque adjustment is achieved through the cooperation of a motor, clutch mechanism, torque adjustment mechanism, and sensor devices. Specifically, the torque adjustment mechanism is first locked to prevent radial rotation, and then the rotation of the motor drives the rotation of the clutch mechanism, causing the torque adjustment mechanism to produce axial displacement, thereby achieving torque adjustment.

[0004] However, when locking the torque adjustment mechanism, position calibration is required first. The torque adjustment mechanism can only be locked to complete the subsequent automatic torque adjustment when the lockable part on the torque adjustment mechanism reaches the preset position, or manual torque adjustment can only be performed when the torque adjustment notch on the torque adjustment mechanism reaches the preset position. Currently, this position calibration process requires multiple attempts to succeed, which makes torque adjustment of power tools time-consuming and laborious, inconvenient to operate, and results in a poor user experience. Summary of the Invention

[0005] In view of this, this application provides an electric tool and an electric tool control method, which can quickly and accurately bring the torque adjustment mechanism to a preset position where torque can be adjusted, thereby improving the convenience of torque adjustment of the electric tool and optimizing the user experience.

[0006] In a first aspect, embodiments of this application provide an electric tool, the electric tool comprising:

[0007] case;

[0008] An output shaft, on which a first thread is provided;

[0009] The drive mechanism includes a motor for outputting power.

[0010] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0011] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0012] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0013] A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing;

[0014] When the power tool enters torque adjustment mode, the controller responds to the motor rotating a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism.

[0015] The controller is also used to control the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjustment mechanism.

[0016] In some embodiments, the torque adjustment mechanism is provided with a second groove;

[0017] When the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove to prevent the torque adjustment mechanism from rotating with the output shaft and / or the motor.

[0018] In some embodiments, the magnetic component is disposed near the second groove, and the line containing the magnetic poles of the magnetic component is perpendicular to the magnetic induction component.

[0019] In some embodiments, when the magnetic component is mounted near the second groove, the orientation of the N and S poles of the magnetic component may not be distinguished.

[0020] The above technical solutions can simplify the installation process, improve the installation efficiency of magnetic components, and save installation costs.

[0021] In some embodiments, the positioning parameters include: a first positioning parameter and a second positioning parameter;

[0022] The first positioning parameter includes the magnetic field strength detected by the magnetic induction component when the locking mechanism can engage with the second groove; the second positioning parameter includes the polarity of the magnetic component when the locking mechanism can engage with the second groove.

[0023] In some embodiments, obtaining the positioning parameters generated by the calibration agency includes:

[0024] The detection voltage output by the calibration mechanism is obtained; the detection voltage is generated based on the magnetic field strength of the magnetic component.

[0025] The detection voltage is converted into an AD value by an analog-to-digital converter, and the AD value is used to indicate the magnetic field strength.

[0026] The positioning parameters are determined based on the AD value.

[0027] In some embodiments, determining the positioning parameters based on the AD value includes:

[0028] The extreme value of AD value is obtained as the first parameter when the motor rotates by a preset angle or within a preset time; the extreme value includes: maximum value and minimum value.

[0029] In some embodiments, determining the positioning parameters based on the AD value includes:

[0030] If the standard AD value is greater than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the N pole of the magnetic component, and the second positioning parameter is the N pole.

[0031] If the standard AD value is less than the average AD value, it is determined that the magnetic induction component is closer to the S pole of the magnetic component, and the second positioning parameter is the S pole;

[0032] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

[0033] In some embodiments, after the motor rotates by a preset angle or a preset time, the torque adjustment mechanism can be rotated at least 360° circumferentially.

[0034] In some embodiments, controlling the power tool to stop according to the positioning parameters so that the locking mechanism can lock the torque adjusting mechanism includes:

[0035] If the standard AD value is greater than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is greater than or equal to (maximum value - M) after the preset time.

[0036] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

[0037] In some embodiments, controlling the power tool to stop according to the positioning parameters so that the locking mechanism can lock the torque adjusting mechanism includes:

[0038] If the standard AD value is less than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is less than or equal to (maximum value + M) after the preset time.

[0039] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

[0040] In some embodiments, the controller is further configured to:

[0041] Recognize the mode switching command input in the operation interface of the power tool or respond to the mode switching key set on the power tool;

[0042] The power tool is controlled to enter torque adjustment mode, and the user is notified by flashing lights or a buzzer that the power tool has entered torque adjustment mode.

[0043] In some embodiments, after the controller controls the power tool to enter torque adjustment mode, the controller is further configured to:

[0044] Start the motor and acquire the current in real time;

[0045] If the current is greater than or equal to a preset current threshold within a preset time, then the locking mechanism is determined to be in a locked state.

[0046] The power tool is controlled to issue an alarm to alert the user.

[0047] Secondly, embodiments of this application provide an AC torque wrench, the AC torque wrench comprising:

[0048] case;

[0049] An output shaft, on which a first thread is provided;

[0050] The drive mechanism includes a motor for outputting power.

[0051] A power cord for connecting AC power to supply power to the motor;

[0052] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0053] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0054] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0055] A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing;

[0056] When the power tool enters torque adjustment mode, the controller responds to the motor rotating a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism.

[0057] The controller is also used to control the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjustment mechanism.

[0058] Thirdly, embodiments of this application provide a DC torque wrench, the DC torque wrench comprising:

[0059] case;

[0060] An output shaft, on which a first thread is provided;

[0061] A drive mechanism, comprising: a motor and a transmission assembly; the motor being connected to the transmission assembly to transmit power;

[0062] A battery pack for supplying power to the motor;

[0063] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the transmission assembly drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0064] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0065] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0066] A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing;

[0067] When the power tool enters torque adjustment mode, the controller responds to the motor rotating a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism.

[0068] The controller is also used to control the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjustment mechanism.

[0069] Fourthly, embodiments of this application provide a power tool, the power tool comprising:

[0070] case;

[0071] An output shaft, on which a first thread is provided;

[0072] The drive mechanism includes a motor for outputting power.

[0073] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0074] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0075] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0076] The calibration mechanism includes a magnetic component and multiple magnetic induction components. The magnetic component is disposed on the torque adjustment mechanism, and the magnetic induction components are disposed on the housing.

[0077] The controller, in response to a mode switching signal, controls the power tool to enter torque adjustment mode;

[0078] When the power tool enters the torque adjustment mode, the controller determines the magnetic induction component closest to the magnetic component based on a preset method;

[0079] The controller controls the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

[0080] In some embodiments, the torque adjustment mechanism is provided with a second groove;

[0081] When the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove to prevent the torque adjustment mechanism from rotating with the output shaft and / or the motor.

[0082] In some embodiments, the magnetic component is disposed near the second groove, and the line containing the magnetic poles of the magnetic component is perpendicular to the magnetic induction component.

[0083] In some embodiments, when the magnetic component is mounted near the second groove, the orientation of the N and S poles of the magnetic component may not be distinguished.

[0084] In some embodiments, the positioning parameters include: a first positioning parameter and a second positioning parameter;

[0085] The first positioning parameter includes the magnetic field strength detected by the magnetic induction component when the locking mechanism can engage with the second groove; the second positioning parameter includes the polarity of the magnetic component when the locking mechanism can engage with the second groove.

[0086] In some embodiments, determining the magnetic induction component closest to the magnetic component based on a preset method includes:

[0087] The motor is controlled to rotate by a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism;

[0088] The magnetic induction component closest to the magnetic component is determined based on the positioning parameters.

[0089] In some embodiments, obtaining the positioning parameters generated by the calibration agency includes:

[0090] The detection voltage output by the calibration mechanism is obtained; the detection voltage is generated based on the magnetic field strength of the magnetic component.

[0091] The detection voltage is converted into an AD value by an analog-to-digital converter, and the AD value is used to indicate the magnetic field strength.

[0092] The positioning parameters are determined based on the AD value.

[0093] In some embodiments, determining the magnetic induction component closest to the magnetic component based on the positioning parameters includes:

[0094] If the standard AD value is greater than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the N pole of the magnetic component, and the second positioning parameter is the N pole.

[0095] Obtain the AD values ​​corresponding to the multiple magnetic induction components within a preset angle or preset time of motor rotation, and determine the magnetic induction component corresponding to the maximum AD value as the magnetic induction component closest to the magnetic component;

[0096] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

[0097] In some embodiments, determining the magnetic induction component closest to the magnetic component based on the positioning parameters includes:

[0098] If the standard AD value is less than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the S pole of the magnetic component, and the second positioning parameter is the S pole.

[0099] Obtain the AD values ​​corresponding to the multiple magnetic induction components within a preset rotation angle or preset time period of the motor, and determine the magnetic induction component corresponding to the smallest AD value as the magnetic induction component closest to the magnetic component;

[0100] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

[0101] In some embodiments, determining the magnetic induction component closest to the magnetic component based on the positioning parameters includes:

[0102] Obtain the rate of change of AD value corresponding to the multiple magnetic induction components within a preset rotation angle or preset time period of the motor, and determine the magnetic induction component with the largest absolute value of the rate of change as the magnetic induction component closest to the magnetic component.

[0103] In some embodiments, determining the magnetic induction component closest to the magnetic component based on a preset method includes:

[0104] Read the torque value recorded at the end of the last torque adjustment of the power tool;

[0105] The axial position of the torque adjustment mechanism is determined based on the torque value;

[0106] The magnetic induction component closest to the magnetic component is determined based on the axial position of the torque adjustment mechanism.

[0107] In some embodiments, the power tool further includes a torque detection mechanism, which includes a pressure sensor electrically connected to the controller and located between the torque adjustment mechanism and the elastic element, for detecting the bias force exerted by the elastic element on the clutch mechanism.

[0108] In some embodiments, determining the magnetic induction component closest to the magnetic component based on a preset method includes:

[0109] Read the pressure value from the pressure sensor and determine the current torque value of the power tool based on the pressure value;

[0110] The axial position of the torque adjustment mechanism is determined based on the torque value;

[0111] The magnetic induction component closest to the magnetic component is determined based on the axial position of the torque adjustment mechanism.

[0112] In some embodiments, after the motor rotates by a preset angle or a preset time, the torque adjustment mechanism can be rotated at least 360° circumferentially.

[0113] In some embodiments, controlling the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism, includes:

[0114] If the standard AD value is greater than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is greater than or equal to (maximum value - M) after the preset time.

[0115] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

[0116] In some embodiments, controlling the power tool to stop according to the positioning parameters so that the locking mechanism can lock the torque adjusting mechanism includes:

[0117] If the standard AD value is less than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is less than or equal to (maximum value + M) after the preset time.

[0118] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

[0119] Fifthly, embodiments of this application provide an AC torque wrench, the AC torque wrench comprising:

[0120] case;

[0121] An output shaft, on which a first thread is provided;

[0122] The drive mechanism includes a motor for outputting power.

[0123] A power cord for connecting AC power to supply power to the motor;

[0124] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0125] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0126] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0127] A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing;

[0128] The controller, in response to a mode switching signal, controls the power tool to enter torque adjustment mode;

[0129] When the power tool enters the torque adjustment mode, the controller determines the magnetic induction component closest to the magnetic component based on a preset method;

[0130] The controller controls the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

[0131] Sixthly, embodiments of this application provide a DC torque wrench, the DC torque wrench comprising:

[0132] case;

[0133] An output shaft, on which a first thread is provided;

[0134] A drive mechanism, comprising: a motor and a transmission assembly; the motor being connected to the transmission assembly to transmit power;

[0135] A battery pack for supplying power to the motor;

[0136] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the transmission assembly drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0137] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0138] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0139] A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing;

[0140] The controller, in response to a mode switching signal, controls the power tool to enter torque adjustment mode;

[0141] When the power tool enters the torque adjustment mode, the controller determines the magnetic induction component closest to the magnetic component based on a preset method;

[0142] The controller controls the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

[0143] In a seventh aspect, embodiments of this application provide a torque adjustment method for an electric tool, the torque adjustment method being applied to the electric tool, the electric tool including: a clutch mechanism, a torque adjustment mechanism, a locking mechanism, and a calibration mechanism;

[0144] The torque adjustment mechanism is used to adjust the clutch torque of the clutch mechanism, the locking mechanism is used to lock the torque adjustment mechanism to prevent circumferential rotation when adjusting the clutch torque, and the calibration mechanism is used to determine the position of the locking mechanism so that the locking mechanism can lock the torque adjustment mechanism.

[0145] The torque adjustment method includes:

[0146] After receiving the mode switching signal, the power tool is controlled to enter the torque adjustment mode; the motor of the power tool is controlled to rotate by a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism; the power tool is controlled to stop according to the positioning parameters so that the locking mechanism can lock the torque adjustment mechanism.

[0147] Alternatively, after acquiring a mode switching signal, the power tool is controlled to enter torque adjustment mode; the magnetic induction component closest to the magnetic component is determined based on a preset method; the power tool is controlled to stop according to the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

[0148] Eighthly, embodiments of this application provide a power tool, the power tool comprising:

[0149] case;

[0150] An output shaft, on which a first thread is provided;

[0151] The drive mechanism includes a motor for outputting power.

[0152] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0153] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0154] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0155] The calibration mechanism includes a magnetic component and multiple magnetic induction components, the multiple magnetic components being disposed on the torque adjustment mechanism, and the magnetic induction components being disposed on the housing;

[0156] The plurality of magnetic induction components are arranged sequentially in a straight line on the housing in the axial direction, and the effective sensing areas of the plurality of magnetic induction components overlap at least partially;

[0157] Within the movable range of the magnetic component, the magnetic component can be effectively sensed by at least one of the plurality of magnetic sensing components.

[0158] In some embodiments, the effective sensing area of ​​the magnetic sensing component is determined based on the effective detection radius of the magnetic sensing component;

[0159] The plurality of magnetic sensing components are arranged in a straight line and uniformly on the housing in the axial direction, and the effective detection range between two adjacent magnetic sensing components overlaps in diameter in the axial direction by 1%-50%.

[0160] In some embodiments, the effective detection range between two adjacent magnetic sensing components includes a first effective sensing region and a second effective sensing region, wherein the first effective sensing region and the second effective sensing region are mirror-symmetrical with respect to the radial direction.

[0161] In some embodiments, the first effective sensing area and the second effective sensing area are respectively controlled by two adjacent magnetic sensing components to sense the magnetic component.

[0162] In some embodiments, the effective sensing area of ​​the magnetic induction component closest to the front end of the power tool in the axial direction is equal in size to the first effective sensing area in the direction close to the front end of the power tool.

[0163] The effective sensing area of ​​the magnetic induction component closest to the rear end of the power tool in the axial direction is equal in size to the second effective sensing area in the direction closest to the rear end of the power tool.

[0164] In some embodiments, the overlapping range of the effective detection ranges of two adjacent magnetic sensing components is simultaneously sensed by the two adjacent magnetic sensing components.

[0165] In some embodiments, when two adjacent magnetic sensing components simultaneously sense the magnetic component within the overlapping range and a preset magnetic field strength is met, it is confirmed that the magnetic component has reached a predetermined position.

[0166] In some embodiments, the magnetic sensing component includes: a circuit board and a magnetic sensing element; the circuit board is electrically connected to the controller, and the magnetic sensing element is disposed on the circuit board.

[0167] In some embodiments, the magnetic sensing component includes: a circuit board and a magnetic sensing element;

[0168] The multiple magnetic sensing components can share a single circuit board, which is axially disposed on the housing and electrically connected to the controller. The multiple magnetic sensing elements are arranged sequentially on the circuit board in a straight line in the axial direction.

[0169] In some embodiments, the torque adjustment mechanism is provided with a second groove;

[0170] When the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove to prevent the torque adjustment mechanism from rotating with the output shaft and / or the motor.

[0171] In some embodiments, the magnetic component is disposed near the second groove, and the line containing the magnetic poles of the magnetic component is perpendicular to the magnetic induction component.

[0172] In some embodiments, when the magnetic component is mounted near the second groove, the orientation of the N and S poles of the magnetic component may not be distinguished.

[0173] In some embodiments, the clutch mechanism further includes a clutch assembly, wherein the first clutch disc or the second clutch disc is provided with a slide and a step portion, and the clutch assembly is located between the first clutch disc and the second clutch disc and on the slide.

[0174] In some embodiments, the clutch assembly is configured as a plurality of clutch steel balls;

[0175] The first clutch disc has multiple first grooves, and the clutch steel ball is partially accommodated in the first grooves; the second clutch disc has a slide and a stepped portion; or,

[0176] The second clutch disc is provided with a plurality of first grooves, and the clutch steel ball is partially accommodated in the first grooves; the first clutch disc is provided with a slide and a step.

[0177] In some embodiments, the clutch assembly is integrally formed with the first clutch disc or the second clutch disc, and the clutch assembly is configured as a hemispherical protrusion;

[0178] The hemispherical protrusion is located on the first clutch disc, and the second clutch disc is provided with a slide and a stepped portion; or,

[0179] The hemispherical protrusion is located on the second clutch disc, and the first clutch disc is provided with a slide and a step.

[0180] In some embodiments, the movable range of the magnetic component is determined according to the following formula:

[0181] In the formula, X is the axial displacement distance of the magnetic component, T is the torque value of the power tool, K is the elastic coefficient of the elastic element, θ is the angle between the step portion on the clutch disc and the plane where the clutch disc is located, r is the rotation radius of the clutch assembly, and h is the height of the step portion.

[0182] The movable range of the magnetic component is determined according to the formula and the torque adjustable range of the power tool.

[0183] Ninthly, embodiments of this application provide an AC torque wrench, the AC torque wrench comprising:

[0184] case;

[0185] An output shaft, on which a first thread is provided;

[0186] The drive mechanism includes a motor for outputting power.

[0187] A power cord for connecting AC power to supply power to the motor;

[0188] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0189] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0190] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0191] A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing;

[0192] The plurality of magnetic induction components are arranged sequentially in a straight line on the housing in the axial direction, and the effective sensing areas of the plurality of magnetic induction components overlap at least partially;

[0193] Within the movable range of the magnetic component, the magnetic component can be effectively sensed by at least one of the plurality of magnetic sensing components.

[0194] Tenthly, embodiments of this application provide a DC torque wrench, the DC torque wrench comprising:

[0195] case;

[0196] An output shaft, on which a first thread is provided;

[0197] A drive mechanism, comprising: a motor and a transmission assembly; the motor being connected to the transmission assembly to transmit power;

[0198] A battery pack for supplying power to the motor;

[0199] A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the transmission assembly drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc;

[0200] A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread.

[0201] A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor;

[0202] A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing;

[0203] The plurality of magnetic induction components are arranged sequentially in a straight line on the housing in the axial direction, and the effective sensing areas of the plurality of magnetic induction components overlap at least partially;

[0204] Within the movable range of the magnetic component, the magnetic component can be effectively sensed by at least one of the plurality of magnetic sensing components.

[0205] Eleventhly, embodiments of this application provide a power tool control method. The power tool control method is applied to a power tool and an active adjustment component disposed outside the power tool. The power tool includes a housing, a drive shaft disposed inside the housing, and a torque adjustment assembly for adjusting the torque of the drive shaft. The torque adjustment assembly includes a clutch component, a torque spring, and a torque adjustment mechanism. The torque spring biases the clutch component. The torque adjustment mechanism includes a passive adjustment component matching the active adjustment component and a torque adjustment disc. The housing has a window that penetrates the housing to expose a torque adjustment notch on the torque adjustment disc. The active adjustment component can pass through the window and the torque adjustment notch to cooperate with the passive adjustment component to adjust the biasing force of the torque spring on the clutch component, thereby achieving torque adjustment of the power tool.

[0206] The method includes:

[0207] Once the predetermined trigger event is confirmed, enter torque adjustment mode;

[0208] In the torque adjustment mode, a first operation is performed to stop the torque adjustment gap within the window range.

[0209] In some embodiments, the power tool further includes a cover for closing or opening the window; the cover is provided with a first magnetic component, and the housing is provided with a first magnetic induction component for sensing the first magnetic component;

[0210] The method further includes:

[0211] The first magnetic induction component senses the first magnetic component on the cover plate to determine whether the window is in a closed or open state.

[0212] The determination of the occurrence of a predetermined trigger event and entry into the torque adjustment mode includes:

[0213] In response to the window being open, the torque adjustment mode is entered.

[0214] In some embodiments, determining that a predetermined trigger event has occurred and entering the torque adjustment mode includes at least one of the following:

[0215] Determine the predetermined operation for the trigger button of the power tool and enter the torque adjustment mode;

[0216] It is determined that the power tool has received a predetermined instruction and enters the torque adjustment mode.

[0217] In some embodiments, the power tool further includes: a second magnetic component that rotates with the drive shaft and has a fixed relative position with the torque adjustment notch; a second magnetic induction component is provided on the housing for sensing the second magnetic component; when the second magnetic component is within the sensing range of the second magnetic induction component, the torque adjustment notch is located within the window range;

[0218] Performing the first operation to stop the torque adjustment notch within the window range includes:

[0219] Control the rotation of the drive shaft;

[0220] In response to the second magnetic induction component sensing the second magnetic component, the drive shaft is controlled to stop rotating so that the torque adjustment notch stops within the window range.

[0221] In some embodiments, controlling the rotation of the drive shaft includes:

[0222] The drive shaft is rotated based on a start signal triggered by the start / stop switch of the power tool.

[0223] In some embodiments, in the axial projection direction of the drive shaft, with the axial projection of the drive shaft center as the vertex of the included angle, the included angle between the axial projection of the torque adjustment notch and the axial projection of the second magnetic component is 180 degrees.

[0224] In some embodiments, when the window is in the open state, the first magnetic component on the cover plate is within the sensing range of the first magnetic induction component;

[0225] When the window is closed, the first magnetic component on the cover plate is outside the sensing range of the first magnetic induction component.

[0226] In some embodiments, performing the first operation to stop the torque adjustment notch within the window range includes:

[0227] Based on the start signal triggered by the start / stop switch of the power tool, the drive shaft is controlled to rotate at a first rotation speed; wherein, the first rotation speed is lower than a second rotation speed, and the second rotation speed is the speed at which the drive shaft is controlled to rotate by the start signal when the power tool is not in the torque adjustment mode.

[0228] Based on the stop signal triggered by the start / stop switch, the drive shaft is controlled to stop rotating, so that the torque adjustment notch stops within the window range.

[0229] In a twelfth aspect, embodiments of this application provide an electric tool, the electric tool comprising: a housing, a controller, a drive shaft disposed inside the housing, and a torque adjustment assembly for adjusting the torque of the drive shaft; the torque adjustment assembly includes a clutch component, a torque spring, and a torque adjustment mechanism; the torque spring biases the clutch component, the torque adjustment mechanism includes a passive adjustment component that matches an active adjustment component outside the electric tool and a torque adjustment disc, the housing is provided with a window penetrating the housing to expose a torque adjustment notch on the torque adjustment disc, the active adjustment component can pass through the window and the torque adjustment notch to cooperate with the passive adjustment component to adjust the biasing force of the torque spring on the clutch component, thereby realizing torque adjustment of the electric tool;

[0230] The controller is used for:

[0231] Once the predetermined trigger event is confirmed, enter torque adjustment mode;

[0232] In the torque adjustment mode, a first operation is performed to stop the torque adjustment gap within the window range.

[0233] In some embodiments, the power tool further includes a cover for closing or opening the window; the cover is provided with a first magnetic component, and the housing is provided with a first magnetic induction component for sensing the first magnetic component;

[0234] The controller is used to: sense the first magnetic component on the cover plate through the first magnetic sensing component to determine whether the window is in a closed state or an open state;

[0235] In response to the window being open, the torque adjustment mode is entered.

[0236] In some embodiments, the controller is used for at least one of the following:

[0237] Determine the predetermined operation for the trigger button of the power tool and enter the torque adjustment mode;

[0238] It is determined that the power tool has received a predetermined instruction and enters the torque adjustment mode.

[0239] In some embodiments, the power tool further includes: a second magnetic component that rotates with the drive shaft and has a fixed relative position with the torque adjustment notch; a second magnetic induction component is provided on the housing for sensing the second magnetic component; when the second magnetic component is within the sensing range of the second magnetic induction component, the torque adjustment notch is located within the window range;

[0240] The controller is specifically used for:

[0241] Control the rotation of the drive shaft;

[0242] In response to the second magnetic induction component sensing the second magnetic component, the drive shaft is controlled to stop rotating so that the torque adjustment notch stops within the window range.

[0243] In some embodiments, the controller for controlling the rotation of the drive shaft is specifically configured to: control the rotation of the drive shaft based on a start signal triggered by the start / stop switch of the power tool.

[0244] In some embodiments, in the axial projection direction of the drive shaft, with the axial projection of the drive shaft center as the vertex of the included angle, the included angle between the axial projection of the torque adjustment notch and the axial projection of the second magnetic component is 180 degrees.

[0245] In some embodiments, when the window is in the open state, the first magnetic component on the cover plate is within the sensing range of the first magnetic induction component;

[0246] When the window is closed, the first magnetic component on the cover plate is outside the sensing range of the first magnetic induction component.

[0247] In some embodiments, the controller is specifically used for:

[0248] Based on the start signal triggered by the start / stop switch of the power tool, the drive shaft is controlled to rotate at a first rotation speed; wherein, the first rotation speed is lower than a second rotation speed, and the second rotation speed is the speed at which the drive shaft is controlled to rotate by the start signal when the power tool is not in the torque adjustment mode.

[0249] Based on the stop signal triggered by the start / stop switch, the drive shaft is controlled to stop rotating, so that the torque adjustment notch stops within the window range.

[0250] As can be seen from the above, the power tool and power tool control method provided in this application have the following beneficial technical effects:

[0251] By providing a magnetic component on the torque adjustment mechanism of the power tool and one or more magnetic induction components on the power tool's housing, and using a preset power tool control method, the power tool is stopped when the magnetic component on the torque adjustment mechanism is sensed by the one or more magnetic induction components. At this time, the torque adjustment mechanism can be locked to complete subsequent automatic torque adjustment, or the torque adjustment notch on the torque adjustment mechanism can reach a preset position for manual torque adjustment. This application can quickly and accurately bring the torque adjustment mechanism to a preset position where torque adjustment is possible, improving the convenience of torque adjustment in power tools and optimizing the user experience. Attached Figure Description

[0252] Figure 1 is a cross-sectional view of a power tool according to an embodiment of this application;

[0253] Figure 2 is a schematic diagram of the structure of a clutch disc in an embodiment of this application;

[0254] Figure 3 is a schematic diagram of another clutch disc in an embodiment of this application;

[0255] Figure 4 is a schematic diagram of the structure of the torque adjustment mechanism 50 in the embodiment of this application;

[0256] Figure 5 is a schematic diagram of the calibration mechanism and clutch detection mechanism 90 in the embodiments of this application;

[0257] Figure 6 is a schematic diagram of the torque detection mechanism 80 and the clutch detection mechanism 90 in the embodiments of this application;

[0258] Figure 7 is a schematic diagram of the division of the effective sensing area between two adjacent magnetic induction components in an embodiment of this application;

[0259] Figure 8 is a schematic diagram of the clutch disc and clutch ball in an embodiment of this application;

[0260] Figure 9 is a graph showing the Hall effect changes of multiple magnetic induction components during the rotation of the magnetic component in an embodiment of this application.

[0261] Figure 10 is a graph showing the change of AD values ​​of multiple magnetic induction components during the rotation of the magnetic component in an embodiment of this application.

[0262] Figure 11 is a schematic flowchart of a positioning method for a torque adjustment mechanism according to an embodiment of this application;

[0263] Figure 12 is a schematic flowchart of a torque adjustment method for an electric tool according to an embodiment of this application;

[0264] Figure 13 is a schematic flowchart of a torque adjustment method for an electric tool according to another embodiment of this application;

[0265] Figure 14 is a functional block diagram of a power tool control system according to an embodiment of this application;

[0266] Figure 15 is a circuit diagram of an electric tool according to an embodiment of this application;

[0267] Figure 16 is a circuit diagram of an electric tool according to another embodiment of this application;

[0268] Figure 17 is a schematic diagram of a power tool structure according to an embodiment of this application;

[0269] Figure 18 is a schematic diagram of another power tool structure according to an embodiment of this application;

[0270] Figure 19 is a structural schematic diagram of an active adjustment component according to an embodiment of this application;

[0271] Figure 20 is a schematic flowchart of a power tool control method according to an embodiment of this application;

[0272] Figure 21 is a schematic diagram of a magnetic induction component signal according to an embodiment of this application;

[0273] Figure 22 is a schematic diagram of the functional framework of a power tool according to an embodiment of this application;

[0274] Figure 23 is a schematic diagram of a power tool control circuit according to an embodiment of this application;

[0275] Figure 24 is a schematic flowchart of a power tool control method according to an embodiment of this application;

[0276] Figure 25 is a schematic diagram of a power tool structure according to an embodiment of this application;

[0277] Figure 26 is a schematic diagram of a power tool structure according to an embodiment of this application;

[0278] Figure 27 is a schematic diagram of the functional framework of a power tool according to an embodiment of this application;

[0279] Figure 28 is a schematic diagram of a power tool control circuit according to an embodiment of this application;

[0280] Figure 29 is a schematic flowchart of a power tool control method according to an embodiment of this application;

[0281] Figure 30 is a schematic diagram of a power tool structure according to an embodiment of this application;

[0282] Figure 31 is a schematic diagram of a power tool structure according to an embodiment of this application;

[0283] Figure 32 is a structural schematic diagram of a DC constant torque wrench according to an embodiment of this application;

[0284] Figure 33 is a structural schematic diagram of an AC torque wrench according to an embodiment of this application.

[0285] The attached diagram is labeled as follows:

[0286] Housing 10, output shaft 20, first thread 201, drive mechanism 30, motor 301, transmission assembly 302, clutch mechanism 40, first clutch disc 401, first groove 4011, second clutch disc 402, protrusion 4021, elastic element 403, clutch assembly 404, torque adjustment mechanism 50, adjusting nut 501, second thread 503, second groove 504, torque adjustment gear 502, torque detection mechanism 80, magnetic component 801, magnetic induction component 802, magnetic induction component 803, magnetic induction component 807, pressure sensor 804, plane bearing 805, pad 806, clutch detection mechanism 90, magnetic component 901, magnetic induction component 902, battery pack 200, power cord 300, display screen 400, power tool 100, torque adjustment assembly 120, torque adjustment mechanism 121, torsion spring 122, first magnetic component 131, first magnetic induction component 140, cover plate 130, torque adjustment notch 12111, drive shaft 110, torque adjustment notch 1211, passive adjustment component 1212, second magnetic induction component 150, second magnetic component 125, start / stop switch 170, trigger button 160, battery 180. Detailed Implementation

[0287] To make the technical solution and beneficial effects of this application more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0288] The embodiments described in this application are not exhaustive, but merely illustrative of some embodiments, and are not intended to limit the scope of protection of this application. Unless otherwise specified, each step in a particular embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined with each other. For example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0289] In each embodiment of this application, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0290] The terminology used in the embodiments of this application is for the purpose of describing specific embodiments only and is not intended to limit the scope of this application.

[0291] In the embodiments of this application, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun after the article can be understood as either a singular expression or a plural expression.

[0292] In the embodiments of this application, "multiple" refers to two or more.

[0293] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0294] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "A in one case, B in another", etc., may include the following technical solutions depending on the situation: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0295] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0296] The prefixes "first," "second," etc., used in the embodiments of this application are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, value, or content of the descriptive objects. The description of the descriptive objects should be found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the value of the descriptive object is not limited by ordinal numbers and can be one or more. For example, in "first device," the value of "device" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0297] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0298] In some embodiments, terms such as “…”, “determine…”, “in the case of…”, “when…”, “when…”, “if…”, etc. can be used interchangeably.

[0299] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0300] In some embodiments, devices, etc., can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as “device”, “equipment”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” can be used interchangeably.

[0301] Furthermore, each element, each row, or each column in the embodiments of this application can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0302] In one possible implementation, as shown in Figure 1, the power tool includes:

[0303] The housing 10 contains an output shaft 20, a drive mechanism 30, a clutch mechanism 40, a torque adjustment mechanism 50, a torque detection mechanism 80, a clutch detection mechanism 90, and a calibration mechanism.

[0304] The output shaft 20 is provided with a first thread 201. The drive mechanism 30 includes a motor 301 and a transmission assembly 302. The clutch mechanism 40 includes a first clutch disc 401, a second clutch disc 402, an elastic element 403, and a clutch assembly 404. The torque adjustment mechanism 50 includes an adjusting nut 501 and a torque adjustment gear disc 502. The adjusting nut 501 is also provided with a second thread 503. The torque detection mechanism 80 includes a magnetic component 801 and a magnetic induction component 802. The calibration mechanism includes a magnetic component 801 and a magnetic induction component 802.

[0305] Specifically, the motor 301 is connected to the transmission assembly 302, and the transmission assembly 302 is connected to the first clutch disc 401. The first clutch disc 401 can interruptibly transmit the torque output by the motor 301 to the second clutch disc 402 through the clutch assembly 404. The elastic element 403 is arranged around the output shaft 20. One end of the elastic element 403 biases the second clutch disc 402, and the other end of the elastic element 403 biases the torque adjustment mechanism 50. The torque adjustment mechanism 50 has a second thread 503. By cooperating with the first thread 201, the biasing force of the elastic element 403 on the second clutch disc 402 can be adjusted to realize the torque adjustment of the power tool. A locking mechanism (not shown in the figure) is used to selectively lock the torque adjustment mechanism 50 so that the torque adjustment mechanism 50 does not rotate with the output shaft 20 and / or the motor 301. A limiting mechanism 70 (not shown in the figure) is used to limit the second clutch disc 402 so that the axial displacement of the second clutch disc 402 is within a preset distance range.

[0306] In one possible implementation, as shown in Figures 1, 2, and 3, the clutch mechanism 40 further includes a clutch assembly 404, which is configured with a plurality of clutch steel balls. A first clutch disc 401 is provided with a plurality of first grooves 4011, and a second clutch disc 402 is provided with a plurality of protrusions 4021. The clutch steel balls are partially accommodated in the first grooves 4011. The first clutch disc 401 can interruptibly transmit torque to the second clutch disc 402 through the clutch steel balls and the protrusions 4021.

[0307] Optionally, a plurality of protrusions 4021 may be provided on the first clutch disc 401, and a plurality of first grooves 4011 may be provided on the second clutch disc 402, with the clutch steel ball partially accommodated in the first groove 4011; the first clutch disc 401 may transmit torque to the second clutch disc 402 intermittently through the protrusions 4021 and the clutch steel ball.

[0308] It should be noted that the above-mentioned preset distance range is calculated and determined based on the height (h) of the protrusion 4021 and the diameter (d) of the clutch steel ball. The preset distance range is [h, h+d). When the axial displacement of the second clutch disc 402 is within the preset distance range, the power tool will never engage the clutch.

[0309] When the power tool adjusts the torque, the torque adjustment mechanism 50 is first locked by the locking mechanism and the axial movement of the second clutch disc 402 is limited by the limiting mechanism 70. Then the motor 301 is started. As the motor 301 drives the output shaft 20 to rotate, the torque adjustment mechanism 50 is displaced axially through the threaded engagement, thereby changing the bias force of the elastic element 403. When the bias force corresponding to the set torque is reached, the motor 301 stops. This realizes the automatic adjustment of the power tool torque and improves the accuracy and adjustable range of torque adjustment.

[0310] It should be noted that when the axial displacement of the second clutch disc 402 is within the preset distance range, the power tool will never engage the clutch.

[0311] In one possible implementation, the power tool further includes a locking state detection mechanism (not shown in the figures), which includes a magnetic component and a magnetic induction component. The magnetic component is disposed on the locking mechanism and / or the limiting mechanism 70, and the magnetic induction component is disposed on the housing of the power tool. The locking state detection mechanism is used to detect and identify whether the locking mechanism is in a locked state and / or whether the limiting mechanism 70 is in a limited state.

[0312] In one possible implementation, the torque detection mechanism 80 includes: a magnetic component 801 and one or more magnetic sensing components (magnetic sensing components 802 and 803). The magnetic component 801 is fixed on the torque adjustment mechanism 50, and the magnetic sensing component 802 is fixed on the housing 10 and electrically connected to the controller. When the locking mechanism locks the torque adjustment mechanism 50, the magnetic component 801 can be sensed by the magnetic sensing components 802 (first magnetic sensing component) and 803 (second magnetic sensing component) to detect the axial displacement of the torque adjustment mechanism 50. The axial displacement of the torque adjustment mechanism 50 is equal to the compression change of the elastic element 403, so the torque value of the power tool can be calculated based on the axial displacement.

[0313] It should be noted that the magnetic induction ranges of magnetic induction components 802 and 803 at least partially overlap each other and cover the movable range of the torque adjustment mechanism 50.

[0314] In another possible implementation (not shown in the figures), the torque detection mechanism 80 includes: a magnetic component 801 and three magnetic induction components (i.e., a first magnetic induction component, a second magnetic induction component, and a third magnetic induction component) arranged sequentially in the axial direction. The magnetic component 801 is fixed on the torque adjustment mechanism 50, and the three magnetic induction components are fixed on the housing 10 and electrically connected to the controller. When the locking mechanism locks the torque adjustment mechanism 50, the magnetic component 801 can be sensed by the three magnetic induction components to detect the axial displacement of the torque adjustment mechanism 50. The axial displacement of the torque adjustment mechanism 50 is equal to the compression change of the elastic element 403, so the torque value of the power tool can be calculated based on the axial displacement.

[0315] It should be noted that the first magnetic induction component has a first sensing range, the second magnetic induction component has a second sensing range, and the third magnetic induction component has a third sensing range; the first sensing range, the second sensing range, and the third sensing range at least partially overlap and cover the movable range of the torque adjustment mechanism 50.

[0316] In one possible implementation, as shown in Figures 1 and 4, the calibration mechanism includes a magnetic component 801 and a magnetic induction component 802. The magnetic component 801 is fixed on the torque adjustment mechanism 50, and the magnetic induction component 802 is fixed on the housing 10 and electrically connected to the controller. The torque adjustment mechanism 50 is provided with a second groove 504. When the magnetic component 801 is sensed by the magnetic induction component 802, the locking mechanism can engage with the second groove 504.

[0317] Optionally, multiple grooves are provided on the torque adjustment mechanism 50 and matched with corresponding magnetic components. When the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with one of the multiple grooves.

[0318] In another possible implementation, as shown in FIG5: the calibration mechanism includes: a magnetic component 801 and a magnetic sensing component 802 (first magnetic sensing component), a magnetic sensing component 803 (second magnetic sensing component), and a magnetic sensing component 807 (third magnetic sensing component). The magnetic component 801 is fixed on the torque adjustment mechanism 50, and the magnetic sensing components 802, 803, and 807 are fixed on the housing 10 and electrically connected to the controller. The torque adjustment mechanism 50 is provided with a second groove 504. When the magnetic component 801 is sensed by the magnetic sensing components 802, 803, and 807, the locking mechanism can engage with the second groove 504.

[0319] It should be noted that the calibration mechanism may not share the magnetic component 801, magnetic induction component 802, and magnetic induction component 803 with the torque detection mechanism 80. The magnetic component and magnetic induction component can be set separately. As long as the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove 504.

[0320] In another possible implementation, the torque adjustment mechanism 50 is provided with multiple grooves (not shown in the figure), and a switchable window is provided on the housing 10. The position of multiple grooves can be observed through the window. When the motor is started, the operator can observe the position of the grooves through the window and manually control the rotation of the motor so that one of the grooves is in the relative position of the locking mechanism. At this time, the locking mechanism can engage with the second groove 504.

[0321] In one possible implementation, the power tool further includes a clutch detection mechanism 90, which includes a magnetic component 901 fixed to the housing 10 and axially movable, and a magnetic induction component 902 disposed on the housing 10. When the power tool reaches a set torque and engages, the second clutch disc 402 drives the magnetic component 901 to move axially, so that the magnetic component 901 can be sensed by the magnetic induction component 902. When the magnetic component 901 is sensed by the magnetic induction component 902, a clutch signal is generated. When the controller receives the clutch signal, it determines that the power tool has engaged and executes a stop operation or other preset operation commands.

[0322] In one possible implementation, the power tool is also provided with an operating interface, which can be located on the rear shell of the housing 10 or on the base of the housing 10. The operating interface is used to input commands to control the power tool to enter the torque adjustment mode. When the power tool enters the torque adjustment mode, the light unit on the power tool flashes or the sound control unit beeps to remind the user, making it easier for the user to operate and improving the user experience.

[0323] In one possible implementation, the power tool further includes: a controller located inside the housing 10 and electrically connected to the motor 301, the controller having a storage unit for storing the correspondence between the compression amount of the elastic element 403 and the torque value, for calculating the torque value when adjusting the torque.

[0324] In another possible implementation, the drive mechanism 30 may not include the transmission assembly 302, and directly drive the first clutch disc 401 to rotate via the motor 301, and the first clutch disc 401 may interrupt the transmission of torque to the second clutch disc 402.

[0325] In another possible implementation, the clutch mechanism 40 may not include the clutch assembly 404. The clutch is engaged or disengaged by the shape matching of the first clutch disc 401 and the second clutch disc 402. For example, a hemispherical protrusion 4021 is provided on the first clutch disc 401 and a stepped portion is provided on the second clutch disc 402. When the output torque of the power tool exceeds the set torque value, the protrusion 4021 can pass over the stepped portion to achieve the clutch effect.

[0326] In another possible implementation, the elastic element 403 can be configured as a spring arranged around the output shaft 20 (the output shaft 20 passes through the interior of the spring), or it can be configured as a plurality of springs arranged around the output shaft 20 (the plurality of springs are spaced apart on the outer periphery of the output shaft 20).

[0327] In another possible implementation, as shown in FIG6, the torque detection mechanism 80 can be configured as a pressure sensor 804, a plane bearing 805 and a gasket 806. The pressure sensor 804 is electrically connected to the controller and is located between the torque adjustment mechanism 50 and the elastic element 403. It is used to detect the bias force of the elastic element 403 on the torque adjustment mechanism 50. The controller then calculates the torque value of the power tool based on the detected pressure value.

[0328] Optionally, the pressure sensor 804 can also be located between the first clutch disc 401 and the elastic element 403 to detect the bias force of the elastic element 403 on the first clutch disc 401. The controller then calculates the torque value of the power tool based on the detected pressure value.

[0329] In one possible implementation, a limiting mechanism may not be provided. The frictional force between the inner wall of the torque adjusting mechanism 50 and the first thread 201 of the output shaft 20, as well as the clutch torque of the clutch mechanism 40, are calculated when the torque adjusting mechanism 50 is locked. This ensures that the clutch torque is always greater than the frictional force, thus guaranteeing that the clutch mechanism 40 does not engage during torque adjustment.

[0330] In one possible implementation, as shown in Figures 1 and 5, the power tool includes:

[0331] Housing 10; output shaft 20, on which a first thread 201 is provided; drive mechanism 30, the drive mechanism 30 including: motor 301; the motor 301 is used to output power; clutch mechanism 40, the clutch mechanism 40 including: first clutch disc 401, second clutch disc 402 and elastic element 403; the motor 301 drives the first clutch disc 401 to rotate, the first clutch disc 401 can interruptibly transmit torque to the second clutch disc 402, the elastic element 403 is arranged around the output shaft 20, one end of the elastic element 403 biases the second clutch disc 402; torque adjustment mechanism 50, the torque adjustment mechanism 50 is biased by the other end of the elastic element 403, the torque adjustment mechanism... The mechanism 50 has a second thread 503, and the torque adjustment mechanism adjusts the biasing force of the elastic element 403 on the second clutch disc 402 by cooperating with the first thread 201 through the second thread 503; a locking mechanism is used to selectively lock the torque adjustment mechanism 50 so that the torque adjustment mechanism 50 does not follow the rotation of the output shaft 20 and / or the motor 301; a calibration mechanism includes a magnetic component and a plurality of magnetic induction components, the plurality of magnetic components are disposed on the torque adjustment mechanism 50, and the magnetic induction components are disposed on the housing 10; the plurality of magnetic induction components are arranged in a straight line on the housing 10 in the axial direction, and the effective sensing areas of the plurality of magnetic induction components at least partially overlap;

[0332] Within the movable range of the magnetic component, the magnetic component can be effectively sensed by at least one of the plurality of magnetic sensing components.

[0333] Furthermore, the torque adjustment mechanism is provided with a second groove; when the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove to prevent the torque adjustment mechanism from rotating with the output shaft and / or the motor.

[0334] The magnetic component is disposed near the second groove, and the line of the magnetic pole of the magnetic component is perpendicular to the magnetic induction component. When the magnetic component is installed near the second groove, the orientation of the N pole and S pole of the magnetic component is not distinguished. The orientation of the magnetic pole of the magnetic component is identified by a preset detection program during the subsequent torque adjustment process.

[0335] In one specific embodiment, as shown in FIG5, a first magnetic induction component 802, a second magnetic induction component 803 and a third magnetic induction component 807 are arranged sequentially in a straight line in the axial direction on the housing 10.

[0336] It should be noted that two, four, or five magnetic induction components can also be set. The specific number of magnetic induction components used can be determined based on the characteristics of the magnetic induction components and the magnetic components themselves, as well as their installation positions.

[0337] Optionally, the effective sensing area of ​​the magnetic sensing component is determined based on the effective detection radius of the magnetic sensing component; the plurality of magnetic sensing components are arranged in a straight line and uniformly on the housing in the axial direction, and the overlap range of the effective detection range between two adjacent magnetic sensing components in the axial direction is 1%-50%.

[0338] Optionally, the plurality of magnetic induction components may be arranged on the housing in a straight line in the axial direction with uneven spacing.

[0339] For example, if the effective detection radius of the magnetic induction component is 2.5 mm, then the axial spacing between two adjacent magnetic induction components is between 2.5 mm and 4.95 mm.

[0340] In one possible implementation, as shown in Figure 7:

[0341] The effective detection range between two adjacent magnetic sensing components (first magnetic sensing component 802 and second magnetic sensing component 803 or second magnetic sensing component 803 and third magnetic sensing component 807) includes a first effective sensing area and a second effective sensing area, which are mirror-symmetric with respect to the radial direction.

[0342] Optionally, the first effective sensing area and the second effective sensing area are respectively managed by the two adjacent magnetic sensing components to sense the magnetic component; that is, in this embodiment, the first effective sensing area can be managed by the first magnetic sensing component 802, and the second effective sensing area can be managed by the second magnetic sensing component 803.

[0343] Furthermore, the effective sensing area of ​​the magnetic induction component closest to the front end of the power tool in the axial direction is equal in size to the first effective sensing area in the direction close to the front end of the power tool.

[0344] The effective sensing area of ​​the magnetic induction component closest to the rear end of the power tool in the axial direction is equal in size to the second effective sensing area in the direction closest to the rear end of the power tool.

[0345] When any magnetic sensing component senses the magnetic component and the preset magnetic field strength is met, it is confirmed that the magnetic component has reached the predetermined position.

[0346] Optionally, the overlapping range of the effective detection ranges of two adjacent magnetic sensing components is simultaneously sensed by the two adjacent magnetic sensing components.

[0347] When two adjacent magnetic sensing components simultaneously sense the magnetic component within the overlapping range and the preset magnetic field strength is met, it is confirmed that the magnetic component has reached the predetermined position.

[0348] By employing two magnetic induction components to simultaneously sense the magnetic components, the accuracy of magnetic component detection can be effectively improved, avoiding false detections and missed detections. Furthermore, the detection precision can be enhanced, thereby enabling accurate and rapid positioning of the torque adjustment mechanism. This facilitates subsequent torque adjustment of power tools and optimizes the user experience.

[0349] It should be noted that the effective sensing area of ​​the magnetic sensing component is not the maximum detection range of the magnetic sensing component, but is determined based on the axial displacement distance of the magnetic component. Within the effective sensing area, the magnetic component can be effectively sensed and the preset magnetic field strength is met.

[0350] In one possible implementation, the magnetic sensing component includes: a circuit board and a magnetic sensing element; the circuit board is electrically connected to the controller, the magnetic sensing element is disposed on the circuit board, and the circuit board is arranged sequentially on the housing in a straight line in the axial direction.

[0351] In another possible implementation, the magnetic sensing component includes: a circuit board and a magnetic sensing element;

[0352] The multiple magnetic sensing components can share a single circuit board, which is axially disposed on the housing and electrically connected to the controller. The multiple magnetic sensing elements are arranged sequentially on the circuit board in a straight line in the axial direction.

[0353] In one possible implementation, as shown in Figures 2, 3 and 8, the clutch mechanism further includes a clutch assembly 404, wherein the first clutch disc 401 or the second clutch disc 402 is provided with a slide (i.e., an arc-shaped slide between adjacent protrusions 4021) and a stepped portion (i.e., protrusions 4021), and the clutch assembly is located between the first clutch disc and the second clutch disc and on the slide.

[0354] Optionally, the movable range of the magnetic component is determined according to the following formula:

[0355] In the formula, X is the axial displacement distance of the magnetic component, T is the torque value of the power tool, K is the elastic coefficient of the elastic element, θ is the angle between the step portion on the clutch disc and the plane where the clutch disc is located, r is the rotation radius of the clutch assembly, and h is the height of the step portion.

[0356] The movable range of the magnetic component is determined according to the formula and the torque adjustable range of the power tool.

[0357] In the above embodiments, by setting multiple magnetic induction components to sense the magnetic components, the accuracy and range of the torque adjustment mechanism's positioning can be improved, facilitating subsequent torque adjustment of the power tool and optimizing the user experience. The following embodiments further illustrate how to position the torque adjustment mechanism.

[0358] Example 1:

[0359] In one possible implementation, as shown in Figures 1 and 5, the power tool includes:

[0360] Housing 10; output shaft 20, on which a first thread 201 is provided; drive mechanism 30, the drive mechanism 30 including: motor 301; the motor 301 is used to output power; clutch mechanism 40, the clutch mechanism 40 including: first clutch disc 401, second clutch disc 402 and elastic element 403; the motor 301 drives the first clutch disc 401 to rotate, the first clutch disc 401 can interruptibly transmit torque to the second clutch disc 402, the elastic element 403 is arranged around the output shaft 20, one end of the elastic element 403 biases the second clutch disc 402; torque adjustment mechanism 50, the... The torque adjustment mechanism 50 is biased by the other end of the elastic element 403. The torque adjustment mechanism 50 has a second thread 503. The torque adjustment mechanism adjusts the biasing force of the elastic element 403 on the second clutch disc 402 by the cooperation of the second thread 503 with the first thread 201. A locking mechanism is used to selectively lock the torque adjustment mechanism 50 so that the torque adjustment mechanism 50 does not rotate with the output shaft 20 and / or the motor 301. A calibration mechanism includes a magnetic component and a plurality of magnetic induction components. The plurality of magnetic components are disposed on the torque adjustment mechanism 50, and the magnetic induction components are disposed on the housing 10.

[0361] When the power tool enters the torque adjustment mode, the controller responds to the motor 301 rotating by a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism; the controller is also used to control the power tool to stop according to the positioning parameters so that the locking mechanism can lock the torque adjustment mechanism 50.

[0362] Optionally, after the motor rotates by a preset angle or a preset time, the torque adjustment mechanism can be rotated at least 360° circumferentially.

[0363] Furthermore, the torque adjustment mechanism 50 is provided with a second groove 504; when the magnetic component 801 is sensed by the magnetic induction component, the locking mechanism can engage with the second groove 504 to prevent the torque adjustment mechanism 50 from rotating with the output shaft 20 and / or the motor 301.

[0364] The magnetic component 801 is disposed near the second groove 504, and the line of the magnetic pole of the magnetic component 801 is perpendicular to the magnetic induction component; when the magnetic component is installed near the second groove, the orientation of the N pole and the S pole of the magnetic component does not need to be distinguished.

[0365] It should be noted that the positioning parameters include: a first positioning parameter and a second positioning parameter;

[0366] The first positioning parameter includes the magnetic field strength detected by the magnetic induction component when the locking mechanism can engage with the second groove; the second positioning parameter includes the polarity of the magnetic component when the locking mechanism can engage with the second groove.

[0367] In one possible implementation, obtaining the positioning parameters generated by the calibration agency includes:

[0368] The detection voltage output by the calibration mechanism is obtained; the detection voltage is generated based on the magnetic field strength of the magnetic component.

[0369] The detection voltage is converted into an AD value by an analog-to-digital converter, and the AD value is used to indicate the magnetic field strength.

[0370] The positioning parameters are determined based on the AD value.

[0371] For example, Figure 9 shows the Hall effect curves of the first magnetic induction component 802, the second magnetic induction component 803, and the third magnetic induction component 807 during the 360° rotation of the magnetic block (magnetic component 801) in the embodiment of this application; Figure 10 shows the AD value change curves corresponding to the first magnetic induction component 802, the second magnetic induction component 803, and the third magnetic induction component 807 in the embodiment of this application.

[0372] Furthermore, determining the positioning parameters based on the AD value includes:

[0373] The extreme value of AD value is obtained as the first parameter when the motor rotates by a preset angle or within a preset time; the extreme value includes: maximum value and minimum value.

[0374] Optionally, determining the positioning parameters based on the AD value includes:

[0375] If the standard AD value is greater than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the N pole of the magnetic component, and the second positioning parameter is the N pole.

[0376] If the standard AD value is less than the average AD value, it is determined that the magnetic induction component is closer to the S pole of the magnetic component, and the second positioning parameter is the S pole;

[0377] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

[0378] Optionally, the step of controlling the power tool to stop according to the positioning parameters so that the locking mechanism can lock the torque adjusting mechanism further includes:

[0379] If the standard AD value is greater than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is greater than or equal to (maximum value - M) after the preset time.

[0380] Optionally, the step of controlling the power tool to stop according to the positioning parameters so that the locking mechanism can lock the torque adjusting mechanism further includes:

[0381] If the standard AD value is less than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is less than or equal to (maximum value + M) after the preset time.

[0382] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

[0383] For example, as shown in Figure 11, after switching the power tool to torque adjustment mode via the power tool's screen, the target speed of the power tool is set to 24 RPM, and the maximum value of the AD value corresponding to several Hall effect sensors (i.e., magnetic induction components) is a, the minimum value is b, and the standard value is 2048. When the trigger is pressed and the machine starts running, the AD value corresponding to the Hall effect sensor is updated in real time. After running for 3 seconds, the maximum value Z among the multiple AD values ​​corresponding to the Hall effect sensor collected in real time is used as the reference value for the subsequent stop signal.

[0384] like If the N pole of the magnetic component is close to the Hall surface, and the real-time sampled AD value of the power tool is greater than ZM, then the power tool is controlled to stop.

[0385] like If the S pole of the magnetic component is close to the Hall surface, and the real-time sampling AD value of the power tool is less than ZM, then the power tool is controlled to stop.

[0386] Specifically, when the magnetic induction component is first powered on and there is no magnetic field, the output voltage is 1.65V, which is converted to an AD value by an analog-to-digital converter and is 2048. M is greater than or equal to zero and is used to compensate for the inertial displacement of the motor during braking.

[0387] In one possible implementation, the controller is further configured to:

[0388] Recognize the mode switching command input in the operation interface of the power tool or respond to the mode switching key set on the power tool;

[0389] The power tool is controlled to enter torque adjustment mode, and the user is notified by flashing lights or a buzzer that the power tool has entered torque adjustment mode.

[0390] In one possible implementation, after the controller controls the power tool to enter torque adjustment mode, the controller is further configured to:

[0391] Start the motor and acquire the current in real time;

[0392] If the current is greater than or equal to a preset current threshold within a preset time, then the locking mechanism is determined to be in a locked state.

[0393] The power tool is controlled to issue an alarm to alert the user.

[0394] In one possible implementation, as shown in FIG12, this application embodiment provides a torque adjustment method for a power tool, the method comprising:

[0395] S1201. After obtaining the mode switching signal, control the power tool to enter the torque adjustment mode;

[0396] S1202. Control the motor of the power tool to rotate by a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism;

[0397] S1203. Control the power tool to stop according to the positioning parameters so that the locking mechanism can lock the torque adjustment mechanism.

[0398] It should be noted that the details of steps S1201-S1203 can be found in the description in Embodiment 1 above, and will not be repeated here.

[0399] Example 2:

[0400] In one possible implementation, as shown in Figures 1 and 5, the power tool includes:

[0401] Housing 10; output shaft 20, on which a first thread 201 is provided; drive mechanism 30, the drive mechanism 30 including: motor 301; the motor 301 is used to output power; clutch mechanism 40, the clutch mechanism 40 including: first clutch disc 401, second clutch disc 402 and elastic element 403; the motor 301 drives the first clutch disc 401 to rotate, the first clutch disc 401 can interruptibly transmit torque to the second clutch disc 402, the elastic element 403 is arranged around the output shaft 20, one end of the elastic element 403 biases the second clutch disc 402; torque adjustment mechanism 50, the... The torque adjustment mechanism 50 is biased by the other end of the elastic element 403. The torque adjustment mechanism 50 has a second thread 503. The torque adjustment mechanism adjusts the biasing force of the elastic element 403 on the second clutch disc 402 by the cooperation of the second thread 503 with the first thread 201. A locking mechanism is used to selectively lock the torque adjustment mechanism 50 so that the torque adjustment mechanism 50 does not rotate with the output shaft 20 and / or the motor 301. A calibration mechanism includes a magnetic component and a plurality of magnetic induction components. The plurality of magnetic components are disposed on the torque adjustment mechanism 50, and the magnetic induction components are disposed on the housing 10.

[0402] The controller, in response to a mode switching signal, controls the power tool to enter a torque adjustment mode; when the power tool enters the torque adjustment mode, the controller determines the magnetic induction component closest to the magnetic component 801 based on a preset method;

[0403] The controller controls the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component 801, so that the locking mechanism can lock the torque adjustment mechanism 50.

[0404] Optionally, after the motor rotates by a preset angle or a preset time, the torque adjustment mechanism can be rotated at least 360° circumferentially.

[0405] Furthermore, the torque adjustment mechanism 50 is provided with a second groove 504; when the magnetic component 801 is sensed by the magnetic induction component, the locking mechanism can engage with the second groove 504 to prevent the torque adjustment mechanism 50 from rotating with the output shaft 20 and / or the motor 301.

[0406] The magnetic component 801 is disposed near the second groove 504, and the line of the magnetic pole of the magnetic component 801 is perpendicular to the magnetic induction component; when the magnetic component is installed near the second groove, the orientation of the N pole and the S pole of the magnetic component does not need to be distinguished.

[0407] It should be noted that the positioning parameters include: a first positioning parameter and a second positioning parameter;

[0408] The first positioning parameter includes the magnetic field strength detected by the magnetic induction component when the locking mechanism can engage with the second groove; the second positioning parameter includes the polarity of the magnetic component when the locking mechanism can engage with the second groove.

[0409] In one possible implementation, determining the magnetic induction component closest to the magnetic component based on a preset method includes:

[0410] The motor is controlled to rotate by a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism;

[0411] The magnetic induction component closest to the magnetic component is determined based on the positioning parameters.

[0412] Optionally, obtaining the positioning parameters generated by the calibration agency includes:

[0413] The detection voltage output by the calibration mechanism is obtained; the detection voltage is generated based on the magnetic field strength of the magnetic component.

[0414] The detection voltage is converted into an AD value by an analog-to-digital converter, and the AD value is used to indicate the magnetic field strength.

[0415] The positioning parameters are determined based on the AD value.

[0416] For example, determining the magnetic induction component closest to the magnetic component based on the positioning parameters includes:

[0417] If the standard AD value is greater than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the N pole of the magnetic component, and the second positioning parameter is the N pole.

[0418] Obtain the AD values ​​corresponding to the multiple magnetic induction components within a preset angle or preset time of motor rotation, and determine the magnetic induction component corresponding to the maximum AD value as the magnetic induction component closest to the magnetic component;

[0419] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

[0420] For example, determining the magnetic induction component closest to the magnetic component based on the positioning parameters further includes:

[0421] If the standard AD value is less than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the S pole of the magnetic component, and the second positioning parameter is the S pole.

[0422] Obtain the AD values ​​corresponding to the multiple magnetic induction components within a preset rotation angle or preset time period of the motor, and determine the magnetic induction component corresponding to the smallest AD value as the magnetic induction component closest to the magnetic component;

[0423] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

[0424] For example, determining the magnetic induction component closest to the magnetic component based on the positioning parameters further includes:

[0425] Obtain the rate of change of AD value corresponding to the multiple magnetic induction components within a preset rotation angle or preset time period of the motor, and determine the magnetic induction component with the largest absolute value of the rate of change as the magnetic induction component closest to the magnetic component.

[0426] In another possible implementation, determining the magnetic induction component closest to the magnetic component based on a preset method includes:

[0427] Read the torque value recorded at the end of the last torque adjustment of the power tool;

[0428] The axial position of the torque adjustment mechanism is determined based on the torque value;

[0429] The magnetic induction component closest to the magnetic component is determined based on the axial position of the torque adjustment mechanism.

[0430] In another possible implementation, as shown in FIG6, the power tool further includes a torque detection mechanism 80, which includes a pressure sensor 804. The pressure sensor 804 is electrically connected to the controller and located between the torque adjustment mechanism 50 and the elastic element 403, and is used to detect the bias force of the elastic element 403 on the clutch mechanism 40.

[0431] Furthermore, the step of determining the magnetic induction component closest to the magnetic component based on a preset method includes:

[0432] Read the pressure value from the pressure sensor and determine the current torque value of the power tool based on the pressure value;

[0433] The axial position of the torque adjustment mechanism is determined based on the torque value;

[0434] The magnetic induction component closest to the magnetic component is determined based on the axial position of the torque adjustment mechanism.

[0435] In one possible implementation, controlling the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism, includes:

[0436] If the standard AD value is greater than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is greater than or equal to (maximum value - M) after the preset time.

[0437] Alternatively, if the standard AD value is less than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is less than or equal to (maximum value + M) after a preset time.

[0438] Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

[0439] In one possible implementation, the controller is further configured to:

[0440] Recognize the mode switching command input in the operation interface of the power tool or respond to the mode switching key set on the power tool;

[0441] The power tool is controlled to enter torque adjustment mode, and the user is notified by flashing lights or a buzzer that the power tool has entered torque adjustment mode.

[0442] In one possible implementation, after the controller controls the power tool to enter torque adjustment mode, the controller is further configured to:

[0443] Start the motor and acquire the current in real time;

[0444] If the current is greater than or equal to a preset current threshold within a preset time, then the locking mechanism is determined to be in a locked state.

[0445] The power tool is controlled to issue an alarm to alert the user.

[0446] In one possible implementation, as shown in FIG13, this application embodiment provides a torque adjustment method for a power tool, the method comprising:

[0447] S1301. After obtaining the mode switching signal, control the power tool to enter the torque adjustment mode;

[0448] S1302. Determine the magnetic induction component that is closest to the magnetic component based on a preset method;

[0449] S1303. Control the power tool to stop according to the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

[0450] It should be noted that the details of steps S1301-S1303 can be found in the description in Embodiment 2 above, and will not be repeated here.

[0451] This application provides a functional block diagram of a power tool control system, as shown in Figure 14. The controller is powered by an external power supply, and the controller controls the operation of the motor through an internal pre-driver and a three-phase inverter. The controller also includes: a current acquisition module and a current signal conditioning module for detecting the operating current of the power tool; a voltage acquisition module for detecting the voltage of the power tool; and a position signal acquisition module and a position signal conditioning module for detecting the commutation of the motor, thereby obtaining relevant parameters such as motor speed and rate.

[0452] This application provides a circuit diagram of an electric tool, as shown in Figure 15. The circuit includes multiple power devices MOSFET 1005, a motor 1000, an MCU 1001, and a data acquisition module 1004.

[0453] Optionally, the acquisition module 1004 is used to acquire at least two mechanical parameters or at least two electrical parameters of the motor 1000. The mechanical parameters include speed parameters, sector time parameters or torque parameters, and the electrical parameters include bus current parameters, phase current parameters, bus voltage parameters, power parameters, freewheeling time parameters or duty cycle parameters.

[0454] The acquisition module 1004 transmits the acquired parameters to the MCU 1001 for data analysis and processing, and then controls the operation of the motor according to the preset motor control strategy.

[0455] In some implementations, the speed parameter includes: speed, speed difference, or slope of the speed curve; the sector time parameter includes: sector time, sector time difference, or slope of the sector time curve; the torque parameter includes: torque, torque difference, or slope of the torque curve; the bus current parameter includes: bus current, bus current difference, or slope of the bus current curve; the phase current parameter includes: phase current, phase current difference, or slope of the phase current curve; the bus voltage parameter includes: bus voltage, bus voltage difference, or slope of the bus voltage curve; the power parameter includes: power, power difference, or slope of the power curve; the freewheeling time parameter includes: freewheeling time, freewheeling time difference, or slope of the freewheeling time curve; the duty cycle parameter includes: duty cycle parameter, duty cycle parameter difference, or slope of the duty cycle parameter curve; and the ratios of different mechanical parameters or different electrical parameters are of the same type.

[0456] Another embodiment of this application provides a circuit diagram of a power tool, as shown in Figure 16:

[0457] In one possible implementation, the control circuit includes a power supply module for supplying power to the power tool; a parameter display module for displaying the parameters of the power tool; a calibration detection module for detecting the set torque; a battery pack communication protocol module; a current detection module for detecting the current during operation of the power tool; a torque sensor detection module for detecting the actual output torque value; a strain gauge sensor detection module for detecting the spring compression; and a microcontroller for controlling the motor, power supply module, parameter display module, calibration detection module, battery pack communication protocol module, current detection module, torque sensor detection module, and strain gauge sensor detection module.

[0458] The technical solutions of Embodiments 1 and 2 above realize the automatic positioning of the torque adjustment mechanism, so that the locking mechanism can lock the torque adjustment mechanism to prepare for the automatic torque adjustment of the power tool. By setting one or more magnetic induction components to sense the magnetic components set on the torque adjustment mechanism, the positioning accuracy of the torque adjustment mechanism is improved, which facilitates subsequent torque adjustment and optimizes the user experience.

[0459] The automatic positioning scheme for the torque adjustment mechanism of a power tool provided in this application has been described in detail above with reference to Figures 1 to 16. The manual or semi-automatic positioning scheme for the torque adjustment mechanism of a power tool provided in this application will be described in detail below with reference to Figures 17-31.

[0460] This application provides an embodiment of a power tool 100. Figures 17 and 18 are a perspective view and a side view of the internal structure of the power tool 100, respectively. As shown in Figures 17 and 18, the power tool 100 includes a housing (not shown), a drive shaft 110 (i.e., output shaft 20) disposed inside the housing, and a torque adjustment assembly 120 (partially not shown) for adjusting the torque of the drive shaft 110. The torque adjustment assembly 120 includes a torque adjustment notch 12111 (i.e., a second groove 504) that rotates with the drive shaft 110 and is used to adjust the torque of the drive shaft 110. The housing is provided with a window (not shown) that penetrates the housing to expose the torque adjustment notch 12111.

[0461] Here, the power tool 100 may include a torque-adjustable power tool 100 such as a torque wrench.

[0462] The drive shaft 110 can rotate based on the drive component (such as a motor) in the power tool 100, and drive the tool head connected to the drive shaft 110, such as a wrench head, drill bit, screwdriver head, etc., to rotate.

[0463] The torque adjustment component 120 is used to adjust the output torque of the drive shaft 110. When the output torque of the drive shaft 110 is greater than the set torque, the connection between the drive component and the drive shaft 110 is disengaged, thereby achieving the function of constant torque.

[0464] In one possible implementation, the torque adjustment assembly 120 may include a clutch component (as shown in Figures 2 and 3), a torsion spring 122 (i.e., elastic element 403), and a torque adjustment mechanism 121 (i.e., torque adjustment mechanism 50). The torsion spring 122 biases the clutch component. The torque adjustment mechanism 121 includes a passive adjustment component 1212 (i.e., torque adjustment gear 502) and a torque adjustment disk 1211 (i.e., torque adjustment gear 502) that match the active adjustment component. The housing has a window that penetrates the housing to expose a torque adjustment notch 12111 on the torque adjustment disk 1211. The active adjustment component can pass through the window and the torque adjustment notch 12111 to cooperate with the passive adjustment component 1212 to adjust the biasing force of the torsion spring 122 on the clutch component, thereby achieving torque adjustment of the power tool.

[0465] In one possible implementation, the torque can be adjusted by an active adjustment member external to the power tool 100. The active adjustment member matches the passive adjustment member 1212 via a torque adjustment notch 12111, thereby adjusting the passive adjustment member 1212 and thus adjusting the torque of the power tool 100.

[0466] In one possible implementation, the active adjustment member is shown in Figure 19. As shown in Figure 19, the top of the active adjustment member has a structure that cooperates with the passive adjustment member 1212 to adjust the torque of the power tool 100. The clutch component uses the spring force of the torsion spring 122 to engage / disengage the drive shaft 110 and the drive component. The torsion spring 122 is disposed between the clutch component and the torque adjustment disc 1211; the torque adjustment disc 1211 is sleeved on the drive shaft 110, and the compression of the torsion spring 122 is adjusted by moving it axially along the drive shaft 110, thereby adjusting the spring force of the torsion spring 122 and thus adjusting the torque of the power tool 100. In actual operation, the torque adjustment disc 1211 rotates together with the drive shaft 110.

[0467] In one possible implementation, as shown in Figure 17, the torque adjustment disc 1211 can be located at the end of the torsion spring 122 away from the body of the power tool 100.

[0468] In one possible implementation, the torque adjustment disc 1211 may also be located at one end of the torque spring 122 near the body of the power tool 100. The torque adjustment notch 12111 may be a component for the user to adjust the torque of the torque adjustment assembly 120.

[0469] In one possible implementation, the torque adjustment notch 12111 can be located on the torque adjustment disc 1211. For example, the torque adjustment notch 12111 is an adjustment notch provided on the torque adjustment disc 1211. The user can rotate the passive adjustment member 1212 by passing the active adjustment member through the torque adjustment notch 12111 to adjust the axial position of the torque adjustment disc 1211, thereby adjusting the torque of the power tool 100. Since the torque adjustment disc 1211 rotates together with the drive shaft 110, the torque adjustment notch 12111 also rotates together with the drive shaft 110.

[0470] For example, as shown in Figure 17, the torque adjustment notch 12111 is an adjustment notch provided on the torque adjustment disc 1211. The torque adjustment mechanism 121 also includes a passive adjustment member 1212, which moves axially along the drive shaft 110 via a thread on the drive shaft 110. The torque spring 122 pushes the torque adjustment disc 1211 toward the passive adjustment member 1212, making the torque adjustment disc 1211 tightly against the passive adjustment member 1212. The passive adjustment member 1212 has adjustment teeth on its surface facing the torque adjustment disc 1211. The user can insert the active adjustment member (adjustment key) into the adjustment notch, and the active adjustment member, through its cooperation with the adjustment teeth, realizes the circumferential rotation of the passive adjustment member 1212, thereby realizing the axial movement of the passive adjustment member 1212, which in turn drives the axial movement of the torque adjustment disc 1211, thus realizing the torque adjustment of the power tool 100.

[0471] The window can be set in the radial direction of the rotation path of the torque adjustment notch 12111. When the torque adjustment notch 12111 rotates to the window position, the user can adjust the torque through the window.

[0472] It should be noted that the position of the torque adjustment mechanism is determined by setting a torque adjustment window on the power tool to achieve manual or semi-automatic positioning of the torque adjustment mechanism. The specific implementation scheme is shown in the following embodiment.

[0473] Example 3:

[0474] In conjunction with the aforementioned power tool 100, this application provides a power tool control method that can be applied to the aforementioned power tool 100, as shown in FIG20. The method includes:

[0475] Step 2001: Confirm that a predetermined trigger event has occurred, and enter torque adjustment mode;

[0476] Step 2002: In the torque adjustment mode, perform the first operation to stop the torque adjustment gap within the window range.

[0477] Here, the power tool control method can be executed by the controller in the power tool 100.

[0478] Here, the pre-defined trigger event is used to trigger the controller, causing the controller to put the power tool into torque adjustment mode.

[0479] Pre-defined trigger events may include electrical signals that trigger the controller. Pre-defined trigger events may also be triggered internally by the controller.

[0480] Pre-defined events can be triggered by users or by the controller based on the current working state.

[0481] In one possible implementation, the torque adjustment mode of the power tool 100 may be different from the non-torque adjustment mode, such as the normal operating mode of the power tool 100.

[0482] In one possible implementation, the speed of the drive shaft 110 of the power tool 100 in torque-adjusting mode is lower than the speed of the drive shaft 110 of the power tool 100 in non-torque-adjusting mode.

[0483] The first operation can be used to directly stop the torque adjustment notch 12111 within the window range. For example, the power tool 100 may include a sensing component for the torque adjustment notch 12111 to sense the current position of the torque adjustment notch 12111. When the window is open, the controller can control the rotation of the drive shaft 110 by a certain angle based on the difference between the current position of the torque adjustment notch 12111 and the window position, so that the torque adjustment notch 12111 is within the window range.

[0484] The first operation can be used to indirectly stop the torque adjustment notch 12111 within the window range. For example, when the window is open, the controller can adjust the rotation mode and speed of the drive shaft 110. For example, the controller can control the rotation of the drive shaft 110 in a step-by-step manner, and make it easier for the user to control the stop position of the torque adjustment notch 12111 by pressing the start / stop switch once, so as to stop the torque adjustment notch 12111 within the window range. Here, the start / stop switch is used to control the start and stop of the drive component to realize the rotation of the drive shaft 110.

[0485] Thus, when a predetermined trigger event is determined to occur, the first operation is performed to stop the torque adjustment notch 12111 within the window range; thereby reducing the number of attempts and the difficulty for the user to accurately align the torque adjustment notch 12111 with the window on the housing, improving operational convenience and enhancing the user experience.

[0486] Example 4:

[0487] In conjunction with the power tool 100 described above, as shown in Figures 17 and 18, the power tool 100 may include a cover plate 130 for closing or opening the window; a first magnetic component 131 is provided on the cover plate 130, and a first magnetic induction component 140 for sensing the first magnetic component 131 is provided on the housing.

[0488] In one possible implementation, the housing is provided with a track for the cover plate 130 to move, and the cover plate 130 opens or closes the window by moving on the track.

[0489] In one possible implementation, a hinge component is provided on the housing, and the cover plate 130 is connected to the hinge component. The window is opened or closed by rotating the cover plate 130 around the hinge component.

[0490] The first magnetic induction component 140 disposed on the housing can be used to sense the first magnetic component 131 to determine whether the cover plate 130 is close to the first magnetic induction component 140 or far away from the first magnetic induction component 140.

[0491] Here, the magnetic sensing component may include a Hall effect device. The magnetic component may include a magnet.

[0492] The magnetic induction component can generate electrical signals with opposite levels when it senses a magnet or when it does not sense a magnet. For example, as shown in Figure 21, the magnetic induction component can generate a high-level electrical signal when it senses a magnet, and a low-level electrical signal when it does not sense a magnet.

[0493] The power tool 100 may also include a controller for controlling the first magnetic induction component 140.

[0494] For example, Figure 22 is a schematic diagram of the circuit function of the power tool 100. As shown in Figure 22, the microcontroller control module is the controller of the power tool 100. The microcontroller control module includes: an arithmetic module for executing programs and controlling the PWM modulation module to output PWM drive signals for the motor; a memory module for storing program content and data during processing; and a timer module for providing clock signals and timing functions to the arithmetic module. The microcontroller control module is connected to the parameter display module to display parameters such as battery level. The microcontroller control module is connected to the Hall sensor detection module 1 (i.e., the first magnetic induction component 140) to obtain the sensing information of the first magnetic induction component 140 (i.e., the open or closed state of the cover 130). The microcontroller control module is connected to the battery communication protocol module to communicate with the battery and manage the battery. The microcontroller control module is connected to the motor drive module to provide PWM drive signals to the motor drive module and adjust the current output to the motor. The power supply module is connected to the motor drive module to provide power to the motor drive module. The current detection module is used to detect the current of the motor drive module and feed it back to the microcontroller control module. The motor drive module outputs current to the motor based on a PWM drive signal to control the motor's rotation. The microcontroller control module adjusts the current output from the motor drive module to the motor using the PWM drive signal to control the motor's start, stop, and / or speed.

[0495] Figure 23 is a circuit diagram showing the specific implementation of some modules in Figure 22. As shown in Figure 23, the power supply module is used to convert the battery voltage into the power supply voltage (+5V) for each functional module. The battery can directly power the motor drive module. The motor drive module powers the motor through a three-phase bridge. The first magnetic induction component 140 is connected to the controller (microcontroller). The first magnetic induction component 140 indicates to the microcontroller via an electrical signal whether it has sensed the first magnetic component 131.

[0496] Accordingly, in some embodiments, the power tool control method further includes: sensing the first magnetic component on the cover plate through the first magnetic induction component to determine whether the window is in a closed state or an open state; determining that a predetermined trigger event has occurred and entering the torque adjustment mode includes: entering the torque adjustment mode in response to the window being in an open state.

[0497] Here, the pre-defined triggering event can include the window being in an open state.

[0498] A first magnetic sensing component 140 is disposed on the housing, and a first magnetic component 131 is disposed on the cover plate 130. As the cover plate 130 moves, the first magnetic sensing component 140 can sense the positional change of the first magnetic component 131. When the first magnetic component 131 is within the sensing range of the first magnetic sensing component 140, the first magnetic sensing component 140 sends a first signal to the controller; when the first magnetic component 131 is outside the sensing range of the first magnetic sensing component 140, the first magnetic sensing component 140 sends a second signal to the controller. The first signal is different from the second signal. The controller can determine the positional change of the first magnetic component 131 based on the first signal or the second signal, that is, determine the positional change of the cover plate 130, and thus determine whether the window is in a closed or open state.

[0499] In some embodiments, when the window is in the open state, the first magnetic component 131 on the cover plate 130 is within the sensing range of the first magnetic induction component 140; when the window is in the closed state, the first magnetic component 131 on the cover plate 130 is outside the sensing range of the first magnetic induction component 140.

[0500] For example, as shown in Figure 17, when the cover plate 130 is in the open window position, the first magnetic component 131 is in the position closest to the first magnetic sensing component 140. The first magnetic sensing component 140 senses the first magnetic component 131 and generates a first signal (such as a high-level signal). The controller receives the first signal and determines that the window is in the open state. When the cover plate 130 is in the closed window position, the first magnetic component 131 is away from the first magnetic sensing component 140, and the first magnetic sensing component 140 does not sense the first magnetic component 131, generating a second signal (such as a low-level signal). The controller receives the second signal and determines that the window is in the closed state.

[0501] In one possible implementation, when the window is open, the first magnetic component 131 on the cover plate 130 is outside the sensing range of the first magnetic induction component 140; when the window is closed, the first magnetic component 131 on the cover plate 130 is within the sensing range of the first magnetic induction component 140.

[0502] With the window open, it can be determined that the user needs to adjust the torque. The controller can then perform the first operation. This first operation stops the torque adjustment notch 12111 within the window range, allowing the user to operate the torque adjustment notch 12111.

[0503] Thus, by setting the first magnetic sensing component 140 of the first magnetic component 131, the open or closed state of the window can be determined; then, when the window is open, the first operation is performed to stop the torque adjustment notch 12111 within the window range; thereby reducing the number of attempts and the difficulty for the user to accurately align the torque adjustment notch 12111 with the window on the housing, improving the ease of operation and enhancing the user experience.

[0504] In some embodiments, as shown in FIG24, performing a first operation to stop the torque adjustment notch within the window range in the torque adjustment mode may include:

[0505] Step 2401: Based on the start signal triggered by the start / stop switch of the power tool, control the drive shaft to rotate at a first rotation speed; wherein, the first rotation speed is lower than a second rotation speed, and the second rotation speed is the speed at which the power tool controls the rotation of the drive shaft when the start signal is triggered in non-torque adjustment mode.

[0506] Step 2402: Based on the stop signal triggered by the start / stop switch, control the drive shaft to stop rotating so that the torque adjustment notch stops within the window range.

[0507] In one possible implementation, the second rotational speed is the rotational speed of the drive shaft 110 when the power tool 100 is operating normally.

[0508] The controller can control the rotation or stop of the drive shaft 110 based on the start signal or stop signal triggered by the start / stop switch.

[0509] When the window is open or a predetermined trigger event occurs, if the controller receives a start signal triggered by the start / stop switch, the controller can control the drive shaft 110 to rotate at a slower second rotation speed. Here, the controller controlling the drive shaft 110 to rotate at the second rotation speed may include the controller controlling the drive component to drive the drive shaft 110 to rotate at the second rotation speed.

[0510] When the drive shaft 110 rotates at a slower speed, the user can more easily observe whether the torque adjustment notch 12111 is within the range of the window.

[0511] When the user observes that the torque adjustment notch 12111 is within the window range, a stop signal can be triggered via the start / stop switch to stop the rotation of the drive shaft 110. Since the drive shaft 110 rotates relatively slowly, there is a high probability that it will remain within the window range between when the user observes the torque adjustment notch 12111 being within the window range and when the notch stops moving. This reduces the number of attempts and the difficulty for the user to accurately align the torque adjustment notch 12111 with the window on the housing, improving ease of operation and enhancing the user experience.

[0512] Example 5

[0513] Similar to the structure of the power tool 100 in Embodiment 4, as shown in Figures 17 and 18, the power tool 100 may include a cover plate 130 for closing or opening the window; a first magnetic component 131 is provided on the cover plate 130, and a first magnetic induction component 140 for sensing the first magnetic component 131 is provided on the housing.

[0514] The first magnetic induction component 140 disposed on the housing can be used to sense the first magnetic component 131 to determine whether the cover plate 130 is close to the first magnetic induction component 140 or far away from the first magnetic induction component 140.

[0515] In some embodiments, the power tool control method further includes: sensing the first magnetic component on the cover plate through the first magnetic induction component to determine whether the window is in a closed state or an open state; determining that a predetermined trigger event has occurred and entering the torque adjustment mode includes: entering the torque adjustment mode in response to the window being in an open state.

[0516] Here, the pre-defined triggering event can include the window being in an open state.

[0517] A first magnetic sensing component 140 is disposed on the housing, and a first magnetic component 131 is disposed on the cover plate 130. As the cover plate 130 moves, the first magnetic sensing component 140 can sense the positional change of the first magnetic component 131. When the first magnetic component 131 is within the sensing range of the first magnetic sensing component 140, the first magnetic sensing component 140 sends a first signal to the controller; when the first magnetic component 131 is outside the sensing range of the first magnetic sensing component 140, the first magnetic sensing component 140 sends a second signal to the controller. The first signal is different from the second signal. The controller can determine the positional change of the first magnetic component 131 based on the first signal or the second signal, that is, determine the positional change of the cover plate 130, and thus determine whether the window is in a closed or open state.

[0518] In some embodiments, when the window is in the open state, the first magnetic component 131 on the cover plate 130 is within the sensing range of the first magnetic induction component 140; when the window is in the closed state, the first magnetic component 131 on the cover plate 130 is outside the sensing range of the first magnetic induction component 140.

[0519] For example, as shown in Figure 17, when the cover plate 130 is in the open window position, the first magnetic component 131 is in the position closest to the first magnetic sensing component 140. The first magnetic sensing component 140 senses the first magnetic component 131 and generates a first signal (such as a high-level signal). The controller receives the first signal and determines that the window is in the open state. When the cover plate 130 is in the closed window position, the first magnetic component 131 is away from the first magnetic sensing component 140, and the first magnetic sensing component 140 does not sense the first magnetic component 131, generating a second signal (such as a low-level signal). The controller receives the second signal and determines that the window is in the closed state.

[0520] In one possible implementation, when the window is open, the first magnetic component 131 on the cover plate 130 is outside the sensing range of the first magnetic induction component 140; when the window is closed, the first magnetic component 131 on the cover plate 130 is within the sensing range of the first magnetic induction component 140.

[0521] With the window open, it can be determined that the user needs to adjust the torque. The controller can then perform the first operation. This first operation stops the torque adjustment notch 12111 within the window range, allowing the user to operate the torque adjustment notch 12111.

[0522] Thus, by setting the first magnetic sensing component 140 of the first magnetic component 131, the open or closed state of the window can be determined; then, when the window is open, the first operation is performed to stop the torque adjustment notch 12111 within the window range; thereby reducing the number of attempts and the difficulty for the user to accurately align the torque adjustment notch 12111 with the window on the housing, improving the ease of operation and enhancing the user experience.

[0523] Figures 25 and 26 are a perspective view and a side view of the internal structure of the power tool 100, respectively. In some embodiments, as shown in Figures 25 and 26, the power tool 100 further includes: a second magnetic component 125 that rotates with the drive shaft 110 and has a fixed relative position with the torque adjustment notch 12111; a second magnetic induction component 150 for sensing the second magnetic component 125 is provided on the housing; when the second magnetic component 125 is within the sensing range of the second magnetic induction component 150, the torque adjustment notch 12111 is located within the window range.

[0524] The second magnetic component 125 can be positioned at a location that always maintains a fixed relative position with respect to the torque adjustment notch 12111. The circumferential position of the torque adjustment notch 12111 can be determined by determining the circumferential position of the second magnetic component 125 relative to the axis of rotation.

[0525] Specifically, the second magnetic component 125 can be disposed on the torque adjusting disk 1211. Both the torque adjusting notch 12111 and the second magnetic component 125 are disposed on the torque adjusting disk 1211, and the relative positions of the torque adjusting notch 12111 and the second magnetic component 125 remain unchanged during the rotation of the drive shaft 110.

[0526] The position of the second magnetic induction component 150 can be set based on the position of the second magnetic component 125. When the second magnetic component 125 is within the sensing range of the second magnetic induction component 150, the torque adjustment notch 12111 is located within the window range.

[0527] The second magnetic sensing component 150 is disposed on the housing. As the cover plate 130 moves, the second magnetic sensing component 150 can sense the positional change of the second magnetic component 125. When the second magnetic component 125 is within the sensing range of the second magnetic sensing component 150, the second magnetic sensing component 150 sends a third signal to the controller; when the second magnetic component 125 is outside the sensing range of the second magnetic sensing component 150, the second magnetic sensing component 125 sends a fourth signal to the controller. The third signal is different from the fourth signal. The controller can determine the positional change of the second magnetic component 125 based on the third or fourth signal, that is, determine the positional change of the second magnetic component 125, and thus determine whether the torque adjustment notch 12111 is within or outside the window range.

[0528] For example, as shown in Figure 27 and Figure 28, the second magnetic induction component 150 is connected to the controller (microcontroller). The second magnetic induction component 150 indicates to the microcontroller via an electrical signal whether it has sensed the second magnetic component 125.

[0529] For example, Figure 27 is a schematic diagram of the circuit function of the power tool 100. As shown in Figure 27, the microcontroller control module is the controller of the power tool 100. The microcontroller control module includes: an arithmetic module for executing programs and controlling the PWM modulation module to output motor PWM drive signals; a memory module for storing program content and data during processing; and a timer module for providing clock signals and timing functions to the arithmetic module. The microcontroller control module is connected to the parameter display module to display parameters such as battery level. The microcontroller control module is connected to the Hall sensor detection module 1 (i.e., the first magnetic induction component 140) to obtain the sensing information of the first magnetic induction component 140 (i.e., the open or closed state of the cover 130). The microcontroller control module is connected to the Hall sensor detection module 2 (i.e., the second magnetic induction component 150) to obtain the sensing information of the second magnetic induction component 150 (i.e., determining whether the torque adjustment notch 12111 is within or outside the window range). The microcontroller control module is connected to the battery communication protocol module to communicate with the battery and manage the battery. The microcontroller control module connects to the motor drive module, providing PWM drive signals to adjust the current output to the motor. The power supply module connects to the motor drive module, providing power. The current detection module detects the current in the motor drive module and feeds it back to the microcontroller control module. The motor drive module outputs current to the motor based on the PWM drive signals to control the motor's rotation. The microcontroller control module adjusts the current output from the motor drive module to the motor using the PWM drive signals to control the motor's start, stop, and / or speed.

[0530] Figure 28 shows a detailed circuit diagram of some modules in Figure 27. As shown in Figure 28, the power supply module is used to convert the battery voltage into the power supply voltage (+5V) for each functional module. The battery can directly power the motor drive module. The motor drive module powers the motor through a three-phase bridge.

[0531] Accordingly, as shown in Figure 29, in the torque adjustment mode, performing the first operation to stop the torque adjustment notch within the window range may include:

[0532] Step 2901: Control the rotation of the drive shaft;

[0533] Step 2902: In response to the second magnetic induction component sensing the second magnetic component, control the drive shaft to stop rotating so that the torque adjustment notch stops within the window range.

[0534] In one possible implementation, the controller determines that the window is open and then controls the drive shaft 110 to rotate. Here, the controller controlling the rotation of the drive shaft 110 may include the controller controlling a power source such as a battery to supply power to the drive components, thereby driving the drive shaft 110 to rotate.

[0535] In some embodiments, controlling the rotation of the drive shaft 110 includes: controlling the rotation of the drive shaft 110 based on a start signal triggered by the start / stop switch of the power tool 100.

[0536] Specifically, the controller determines that the window is open or a predetermined trigger event has occurred, and the user can trigger a start signal via a start / stop switch to control the rotation of the drive shaft 110. When the drive shaft 110 rotates, the second magnetic component 125 rotates along with it. After the second magnetic induction component 150 senses the second magnetic component 125, it can send a third signal to the controller to indicate that the second magnetic induction component 150 has sensed the second magnetic component 125. The second magnetic induction component 150 sensing the second magnetic component 125 is equivalent to the torque adjustment notch 12111 being within the window range. Therefore, after the controller determines that the second magnetic induction component 150 has sensed the second magnetic component 125 (i.e., has received the third signal), it stops the drive shaft 110 from rotating, thus keeping the torque adjustment notch 12111 within the window range.

[0537] In one possible implementation, the controller determines that the window is open or that a predetermined trigger event has occurred, and then controls the drive shaft 110 to rotate at a first rotational speed. This first rotational speed is lower than a second rotational speed, which is the speed at which the power tool 100, in non-torque adjustment mode, receives the start signal to trigger the rotation of the drive shaft 110. If the drive shaft 110 rotates too quickly, when the controller stops the drive shaft 110, the torque adjustment notch 12111 may have moved out of the window range due to the response delay of the controller and / or the drive components. By reducing the speed of the drive shaft 110, the accuracy of the controller in stopping the torque adjustment notch 12111 within the window range is improved.

[0538] In some embodiments, in the axial projection direction of the transmission shaft 110, with the axial projection of the axis of the transmission shaft 110 as the vertex of the included angle, the included angle between the axial projection of the torque adjustment notch 12111 and the axial projection of the second magnetic component 125 is 180 degrees.

[0539] As shown in Figures 25 and 26, the torque adjustment notch 12111 and the second magnetic component 125 are arranged opposite to each other in the circumference of the torque adjustment disk 1211.

[0540] In one possible implementation, the axial projection of the axis of the drive shaft 110 is taken as the vertex of the included angle, and the included angle between the axial projection of the first magnetic induction component 140 and the axial projection of the second magnetic induction component 150 is 180 degrees.

[0541] By arranging the first magnetic induction component 140 and the second magnetic induction component 150 back to back, the distance between the magnetic induction components can be increased, reducing interference.

[0542] In one possible implementation, there are multiple second magnetic induction components 150. The multiple second magnetic induction components 150 are arranged axially. The multiple second magnetic induction components 150 are located within the axial movement range of the torque adjustment notch 12111.

[0543] Since the torque adjusting disc 1211 adjusts the torque through axial movement, the axial position of the torque adjusting notch 12111 on the drive shaft 110 is variable. Therefore, multiple second magnetic induction components 150 can be provided to sense the circumferential position of the second magnetic component 125 at different axial positions, thereby determining the circumferential position of the torque adjusting notch 12111. This expands the sensing range of the second magnetic induction components 150.

[0544] Example 6:

[0545] The controller of the power tool 100 determines that a predetermined trigger event has occurred and enters a torque adjustment mode. In the torque adjustment mode, a first operation is performed to stop the torque adjustment notch 12111 within the window range.

[0546] Figure 30 is a schematic diagram of some components of the power tool 100. The power tool 100 may also include a trigger button 160, a start / stop switch 170, and a battery 180 (i.e., a battery pack 200). As shown in Figure 30, the trigger button may include a button other than the start / stop switch 170. The trigger button can be located in a position that the user can reach, such as the handle. The location of the trigger button 160 is not limited here.

[0547] In some embodiments, determining that a predetermined trigger event has occurred and entering the torque adjustment mode includes at least one of the following:

[0548] Determine the predetermined operation for triggering button 160 of the power tool 100, and enter the torque adjustment mode;

[0549] It is determined that the power tool 100 has received a predetermined instruction and enters the torque adjustment mode.

[0550] Here, the predetermined trigger event includes a predetermined operation of the trigger button 160 and / or receiving predetermined instruction information. In one possible implementation, the trigger button 160 may include a start / stop switch 170. When the trigger button 160 is a start / stop switch 170, the predetermined operation may differ from the operation of the start / stop switch 170 during normal operation of the power tool. For example, the normal way for the user to operate the power tool 100 is to continuously press the start / stop switch 170 to rotate the drive shaft 110. Then the predetermined operation may be multiple consecutive presses for a duration shorter than a predetermined time.

[0551] In one possible implementation

[0552] When users need to adjust the torque, they can perform a predetermined operation on the trigger button 160, such as double-clicking the trigger button 160, to put the power tool into torque adjustment mode.

[0553] Power tools can establish communication connections with servers, etc. Power tool 100 can receive predetermined instruction information through the communication connection and enter torque adjustment mode.

[0554] In one possible implementation, the communication connection may include: a wireless communication connection and / or a wired communication connection, etc. Wireless communication may include Bluetooth, Wi-Fi, etc.

[0555] Thus, the power tool 100 performs a first operation by triggering the trigger button 160 and / or by receiving a predetermined instruction, causing the torque adjustment notch 12111 to stop within the window range; thereby reducing the number of attempts and the difficulty for the user to accurately align the torque adjustment notch 12111 with the window on the housing, improving ease of operation and enhancing the user experience.

[0556] In some embodiments, similar to Embodiment 2, in the torque adjustment mode, performing a first operation to stop the torque adjustment gap within the window range may include:

[0557] Based on the start signal triggered by the start / stop switch of the power tool 100, the drive shaft 110 is controlled to rotate at a first rotation speed; wherein, the first rotation speed is lower than a second rotation speed, and the second rotation speed is the speed at which the power tool 100 controls the rotation of the drive shaft 110 when the start signal is triggered in a non-torque adjustment mode.

[0558] Based on the stop signal triggered by the start / stop switch, the drive shaft 110 is controlled to stop rotating, so that the torque adjustment notch 12111 stops within the window range.

[0559] In one possible implementation, the second rotational speed is the rotational speed of the drive shaft 110 when the power tool 100 is operating normally.

[0560] The controller can control the rotation or stop of the drive shaft 110 based on the start signal or stop signal triggered by the start / stop switch.

[0561] When the window is open or a predetermined trigger event occurs, if the controller receives a start signal triggered by the start / stop switch, the controller can control the drive shaft 110 to rotate at a slower second rotation speed. Here, the controller controlling the drive shaft 110 to rotate at the second rotation speed may include the controller controlling the drive component to drive the drive shaft 110 to rotate at the second rotation speed.

[0562] When the drive shaft 110 rotates at a slower speed, the user can more easily observe whether the torque adjustment notch 12111 is within the range of the window.

[0563] When the user observes that the torque adjustment notch 12111 is within the window range, a stop signal can be triggered via the start / stop switch to stop the rotation of the drive shaft 110. Since the drive shaft 110 rotates relatively slowly, there is a high probability that it will remain within the window range between when the user observes the torque adjustment notch 12111 being within the window range and when the notch stops moving. This reduces the number of attempts and the difficulty for the user to accurately align the torque adjustment notch 12111 with the window on the housing, improving ease of operation and enhancing the user experience.

[0564] Example 7:

[0565] The controller of the power tool 100 determines that a predetermined trigger event has occurred and enters a torque adjustment mode. In the torque adjustment mode, a first operation is performed to stop the torque adjustment notch 12111 within the window range.

[0566] Figure 31 is a schematic diagram of some components of the power tool 100. The power tool 100 may also include a trigger button 160, a start / stop switch 170, and a battery 180. As shown in Figure 31, the trigger button 160 may include a button other than the start / stop switch 170. The trigger button 160 may be located in a position that the user can reach, such as the handle. The location of the trigger button 160 is not limited here.

[0567] In some embodiments, determining that a predetermined trigger event has occurred and entering the torque adjustment mode includes at least one of the following:

[0568] Determine the predetermined operation for triggering button 160 of the power tool 100, and enter the torque adjustment mode;

[0569] It is determined that the power tool 100 has received a predetermined instruction and enters the torque adjustment mode.

[0570] Here, the predetermined trigger event includes a predetermined operation of the trigger button 160 and / or receiving predetermined instruction information.

[0571] In one possible implementation, the trigger button 160 may include a start / stop switch. When the trigger button 160 is a start / stop switch, the predetermined operation may differ from the operation of the start / stop switch during normal operation of the power tool. For example, the normal way for the user to operate the power tool 100 is to continuously press the start / stop switch to rotate the drive shaft 110. Then the predetermined operation may be multiple consecutive presses for a duration shorter than a predetermined time.

[0572] In one possible implementation

[0573] When users need to adjust the torque, they can perform a predetermined operation on the trigger button 160, such as double-clicking the trigger button 160, to put the power tool into torque adjustment mode.

[0574] Power tools can establish communication connections with servers, etc. Power tool 100 can receive predetermined instruction information through the communication connection and enter torque adjustment mode.

[0575] In one possible implementation, the communication connection may include: a wireless communication connection and / or a wired communication connection, etc. Wireless communication may include Bluetooth, Wi-Fi, etc.

[0576] Thus, the power tool 100 performs a first operation by triggering the trigger button 160 and / or by receiving a predetermined instruction, causing the torque adjustment notch 12111 to stop within the window range; thereby reducing the number of attempts and the difficulty for the user to accurately align the torque adjustment notch 12111 with the window on the housing, improving ease of operation and enhancing the user experience.

[0577] As shown in Figure 31, similar to the power tool 100 shown in Figures 26 and 27, the power tool 100 further includes: a second magnetic component 125 (not shown in Figure 31) that rotates with the drive shaft 110 and has a fixed relative position with the torque adjustment notch 12111; a second magnetic induction component 150 for sensing the second magnetic component 125 is provided on the housing; when the second magnetic component 125 is within the sensing range of the second magnetic induction component 150, the torque adjustment notch 12111 is located within the window range.

[0578] The second magnetic component 125 can be positioned at a location that always maintains a fixed relative position with respect to the torque adjustment notch 12111. The circumferential position of the torque adjustment notch 12111 can be determined by determining the circumferential position of the second magnetic component 125 relative to the axis of rotation.

[0579] Specifically, the second magnetic component 125 can be disposed on the torque adjusting disk 1211. Both the torque adjusting notch 12111 and the second magnetic component 125 are disposed on the torque adjusting disk 1211, and the relative positions of the torque adjusting notch 12111 and the second magnetic component 125 remain unchanged during the rotation of the drive shaft 110.

[0580] The position of the second magnetic induction component 150 can be set based on the position of the second magnetic component 125. When the second magnetic component 125 is within the sensing range of the second magnetic induction component 150, the torque adjustment notch 12111 is located within the window range.

[0581] The second magnetic sensing component 150 is disposed on the housing. As the cover plate 130 moves, the second magnetic sensing component 150 can sense the positional change of the second magnetic component 125. When the second magnetic component 125 is within the sensing range of the second magnetic sensing component 150, the second magnetic sensing component 150 sends a third signal to the controller; when the second magnetic component 125 is outside the sensing range of the second magnetic sensing component 150, the second magnetic sensing component 125 sends a fourth signal to the controller. The third signal is different from the fourth signal. The controller can determine the positional change of the second magnetic component 125 based on the third or fourth signal, that is, determine the positional change of the second magnetic component 125, and thus determine whether the torque adjustment notch 12111 is within or outside the window range.

[0582] For example, as shown in Figure 10 and Figure 11, the second magnetic induction component 150 is connected to the controller (microcontroller). The second magnetic induction component 150 indicates to the microcontroller via an electrical signal whether it has sensed the second magnetic component 125.

[0583] For example, Figure 27 is a schematic diagram of the circuit function of the power tool 100. As shown in Figure 27, the microcontroller control module is the controller of the power tool 100. The microcontroller control module includes: an arithmetic module for executing programs and controlling the PWM modulation module to output motor PWM drive signals; a memory module for storing program content and data during processing; and a timer module for providing clock signals and timing functions to the arithmetic module. The microcontroller control module is connected to the parameter display module to display parameters such as battery level. The microcontroller control module is connected to the Hall sensor detection module 1 (i.e., the first magnetic induction component 140) to obtain the sensing information of the first magnetic induction component 140 (i.e., the open or closed state of the cover 130). The microcontroller control module is connected to the Hall sensor detection module 2 (i.e., the second magnetic induction component 150) to obtain the sensing information of the second magnetic induction component 150 (i.e., determining whether the torque adjustment notch 12111 is within or outside the window range). The microcontroller control module is connected to the battery communication protocol module to communicate with the battery and manage the battery. The microcontroller control module connects to the motor drive module, providing PWM drive signals to adjust the current output to the motor. The power supply module connects to the motor drive module, providing power. The current detection module detects the current in the motor drive module and feeds it back to the microcontroller control module. The motor drive module outputs current to the motor based on the PWM drive signals to control the motor's rotation. The microcontroller control module adjusts the current output from the motor drive module to the motor using the PWM drive signals to control the motor's start, stop, and / or speed.

[0584] Figure 28 shows a detailed circuit diagram of some modules in Figure 27. As shown in Figure 28, the power supply module is used to convert the battery voltage into the power supply voltage (+5V) for each functional module. The battery can directly power the motor drive module. The motor drive module powers the motor through a three-phase bridge.

[0585] Correspondingly, similar to Embodiment 3, in the torque adjustment mode, performing the first operation to stop the torque adjustment gap within the window range may include: controlling the drive shaft 110 to rotate; and in response to the second magnetic induction component 150 sensing the second magnetic component 125, controlling the drive shaft 110 to stop rotating so that the torque adjustment gap 12111 stops within the window range.

[0586] In one possible implementation, the controller determines that the window is open and then controls the drive shaft 110 to rotate. Here, the controller controlling the rotation of the drive shaft 110 may include the controller controlling a power source such as a battery to supply power to the drive components, thereby driving the drive shaft 110 to rotate.

[0587] In some embodiments, controlling the rotation of the drive shaft 110 includes: controlling the rotation of the drive shaft 110 based on a start signal triggered by the start / stop switch of the power tool 100.

[0588] Specifically, the controller determines that the window is open or a predetermined trigger event has occurred, and the user can trigger a start signal via a start / stop switch to control the rotation of the drive shaft 110. When the drive shaft 110 rotates, the second magnetic component 125 rotates along with it. After the second magnetic induction component 150 senses the second magnetic component 125, it can send a third signal to the controller to indicate that the second magnetic induction component 150 has sensed the second magnetic component 125. The second magnetic induction component 150 sensing the second magnetic component 125 is equivalent to the torque adjustment notch 12111 being within the window range. Therefore, after the controller determines that the second magnetic induction component 150 has sensed the second magnetic component 125 (i.e., has received the third signal), it stops the drive shaft 110 from rotating, thus keeping the torque adjustment notch 12111 within the window range.

[0589] In one possible implementation, the controller determines that the window is open or that a predetermined trigger event has occurred, and then controls the drive shaft 110 to rotate at a first rotational speed. This first rotational speed is lower than a second rotational speed, which is the speed at which the power tool 100, in non-torque adjustment mode, receives the start signal to trigger the rotation of the drive shaft 110. If the drive shaft 110 rotates too quickly, when the controller stops the drive shaft 110, the torque adjustment notch 12111 may have moved out of the window range due to the response delay of the controller and / or the drive components. By reducing the speed of the drive shaft 110, the accuracy of the controller in stopping the torque adjustment notch 12111 within the window range is improved.

[0590] In some embodiments, in the axial projection direction of the transmission shaft 110, with the axial projection of the axis of the transmission shaft 110 as the vertex of the included angle, the included angle between the axial projection of the torque adjustment notch 12111 and the axial projection of the second magnetic component 125 is 180 degrees.

[0591] As shown in Figures 25 and 26, the torque adjustment notch 12111 and the second magnetic component 125 are arranged opposite to each other in the circumference of the torque adjustment disk 1211.

[0592] In one possible implementation, the axial projection of the axis of the drive shaft 110 is taken as the vertex of the included angle, and the included angle between the axial projection of the first magnetic induction component 140 and the axial projection of the second magnetic induction component 150 is 180 degrees.

[0593] By arranging the first magnetic induction component 140 and the second magnetic induction component 150 back to back, the distance between the magnetic induction components can be increased, reducing interference.

[0594] In one possible implementation, there are multiple second magnetic induction components 150. The multiple second magnetic induction components 150 are arranged axially. The multiple second magnetic induction components 150 are located within the axial movement range of the torque adjustment notch 12111.

[0595] Since the torque adjusting disc 1211 adjusts the torque through axial movement, the axial position of the torque adjusting notch 12111 on the drive shaft 110 is variable. Therefore, multiple second magnetic induction components 150 can be provided to sense the circumferential position of the second magnetic component 125 at different axial positions, thereby determining the circumferential position of the torque adjusting notch 12111. This expands the sensing range of the second magnetic induction components 150.

[0596] The power tool provided in this application embodiment includes a housing, a drive shaft disposed inside the housing, and a torque adjustment assembly for adjusting the torque of the drive shaft. The torque adjustment assembly includes a clutch component, a torque spring, and a torque adjustment mechanism. The torque spring biases the clutch component. The torque adjustment mechanism includes a passive adjustment component that matches the active adjustment component and a torque adjustment disc. The housing has a window that penetrates the housing to expose a torque adjustment notch on the torque adjustment disc. The active adjustment component can pass through the window and the torque adjustment notch to cooperate with the passive adjustment component to adjust the biasing force of the torque spring on the clutch component, thereby realizing the torque adjustment of the power tool. The control method includes: determining that a predetermined trigger event has occurred and entering a torque adjustment mode; in the torque adjustment mode, performing a first operation to stop the torque adjustment notch within the window range. Thus, when a predetermined trigger event is determined to occur, the first operation is performed to stop the torque adjustment notch within the window range; thereby reducing the number of attempts and the difficulty for the user to accurately align the torque adjustment notch with the window on the housing, improving operational convenience and enhancing the user experience.

[0597] It should be noted that the power tools in Embodiments 1-7 can be DC torque wrenches, AC torque wrenches, or other torque-setting tools.

[0598] For example, as shown in FIG32, the DC torque wrench includes a housing 10, an output shaft 20 and a battery pack 200. The technical solutions in Embodiments 1 to 7 above can all be applied to the DC torque wrench shown in FIG32.

[0599] Specifically, a DC torque wrench powered by a battery pack 200 may have a battery pack mounting section for mounting the battery pack 200.

[0600] In one possible implementation, the battery pack 200 is detachably mounted to the housing 10 of the DC torque wrench.

[0601] In another possible implementation, the battery pack 200 is fixedly installed in the receiving cavity formed by the housing 10, that is, the battery pack 200 is built into the DC torque wrench.

[0602] For example, as shown in FIG33, the AC torque wrench includes a housing 10, an output shaft 20 and a power cord 300. The technical solutions in Embodiments 1 to 7 above can all be applied to the AC torque wrench shown in FIG33.

[0603] Specifically, the AC torque wrench operates by connecting to an external AC power source via a power cord 300. The power cord 300 also includes an AC plug. The arrangement of the power cord 300 can be determined based on the location of the motor or the structure and wiring of the AC torque wrench. The AC torque wrench is equipped with an AC power unit for connecting to AC power to supply power to the AC torque wrench.

[0604] In one possible implementation, the AC unit includes an AC plug and peripheral circuitry electrically connected to the AC plug; wherein the AC plug is inserted into an AC socket to access AC mains power, thereby providing a power source for the power tool.

[0605] In another possible implementation, the AC unit includes other structural forms and peripheral circuits capable of accessing AC power, such as an AC plug that is connected to AC power via a portable substation.

[0606] It should be noted that the AC power unit only needs to be able to connect to AC power; the specific structure and form are not restricted here. The AC power that the AC power unit can connect to is in the range of 110V to 130V or 210V to 230V.

[0607] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described power tool control method.

[0608] The computer-readable storage medium provided in this embodiment can execute the power tool control method of the above embodiment. Its implementation principle and technical effect are similar, and will not be described again here.

[0609] The aforementioned computer-readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0610] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an Application Specific Integrated Circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in an electronic device or a host device.

[0611] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0612] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0613] In the description of this specification, references to "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0614] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A power tool, characterized in that, The power tool includes: case; An output shaft, on which a first thread is provided; The drive mechanism includes a motor for outputting power. A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing; When the power tool enters torque adjustment mode, the controller responds to the motor rotating a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism. The controller is also used to control the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjustment mechanism.

2. The power tool according to claim 1, characterized in that, The torque adjustment mechanism is provided with a second groove; When the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove to prevent the torque adjustment mechanism from rotating with the output shaft and / or the motor.

3. The power tool according to claim 2, characterized in that, The magnetic component is disposed near the second groove, and the line containing the magnetic poles of the magnetic component is perpendicular to the magnetic induction component.

4. The power tool according to claim 3, characterized in that, When the magnetic component is installed near the second groove, the orientation of the N and S poles of the magnetic component does not need to be distinguished.

5. The power tool according to claim 2, characterized in that, The positioning parameters include: a first positioning parameter and a second positioning parameter; The first positioning parameter includes the magnetic field strength detected by the magnetic induction component when the locking mechanism can engage with the second groove; the second positioning parameter includes the polarity of the magnetic component when the locking mechanism can engage with the second groove.

6. The power tool according to claim 5, characterized in that, The process of obtaining the positioning parameters generated by the calibration agency includes: The detection voltage output by the calibration mechanism is obtained; the detection voltage is generated based on the magnetic field strength of the magnetic component. The detection voltage is converted into an AD value by an analog-to-digital converter, and the AD value is used to indicate the magnetic field strength. The positioning parameters are determined based on the AD value.

7. The power tool according to claim 6, characterized in that, Determining the positioning parameters based on the AD value includes: The extreme value of AD value is obtained as the first parameter when the motor rotates by a preset angle or within a preset time; the extreme value includes: maximum value and minimum value.

8. The power tool according to claim 6, characterized in that, Determining the positioning parameters based on the AD value includes: If the standard AD value is greater than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the N pole of the magnetic component, and the second positioning parameter is the N pole. If the standard AD value is less than the average AD value, it is determined that the magnetic induction component is closer to the S pole of the magnetic component, and the second positioning parameter is the S pole; Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

9. The power tool according to claim 1, characterized in that, After the motor rotates by a preset angle or for a preset time, the torque adjustment mechanism can rotate at least 360° circumferentially.

10. The power tool according to claim 1, characterized in that, The step of controlling the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjusting mechanism, includes: If the standard AD value is greater than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is greater than or equal to (maximum value - M) after the preset time. Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

11. The power tool according to claim 1, characterized in that, The step of controlling the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjusting mechanism, includes: If the standard AD value is less than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is less than or equal to (maximum value + M) after the preset time. Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

12. The power tool according to claim 1, characterized in that, The controller is also used for: Recognize the mode switching command input in the operation interface of the power tool or respond to the mode switching key set on the power tool; The power tool is controlled to enter torque adjustment mode, and the user is notified by flashing lights or a buzzer that the power tool has entered torque adjustment mode.

13. The power tool according to claim 12, characterized in that, After the controller puts the power tool into torque adjustment mode, the controller is further configured to: Start the motor and acquire the current in real time; If the current is greater than or equal to a preset current threshold within a preset time, then the locking mechanism is determined to be in a locked state. The power tool is controlled to issue an alarm to alert the user.

14. An AC torque-controlled wrench, characterized in that, The AC torque wrench includes: case; An output shaft, on which a first thread is provided; The drive mechanism includes a motor for outputting power. A power cord for connecting AC power to supply power to the motor; A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing; When the power tool enters torque adjustment mode, the controller responds to the motor rotating a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism. The controller is also used to control the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjustment mechanism.

15. A DC constant torque wrench, characterized in that, The DC constant torque wrench includes: case; An output shaft, on which a first thread is provided; A drive mechanism, comprising: a motor and a transmission assembly; the motor being connected to the transmission assembly to transmit power; A battery pack for supplying power to the motor; A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the transmission assembly drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing; When the power tool enters torque adjustment mode, the controller responds to the motor rotating a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism. The controller is also used to control the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjustment mechanism.

16. A power tool, characterized in that, The power tool includes: case; An output shaft, on which a first thread is provided; The drive mechanism includes a motor for outputting power. A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; The calibration mechanism includes a magnetic component and multiple magnetic induction components. The magnetic component is disposed on the torque adjustment mechanism, and the magnetic induction components are disposed on the housing. The controller, in response to a mode switching signal, controls the power tool to enter torque adjustment mode; When the power tool enters the torque adjustment mode, the controller determines the magnetic induction component closest to the magnetic component based on a preset method; The controller controls the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

17. The power tool according to claim 15, characterized in that, The torque adjustment mechanism is provided with a second groove; When the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove to prevent the torque adjustment mechanism from rotating with the output shaft and / or the motor.

18. The power tool according to claim 17, characterized in that, The magnetic component is disposed near the second groove, and the line containing the magnetic poles of the magnetic component is perpendicular to the magnetic induction component.

19. The power tool according to claim 18, characterized in that, When the magnetic component is installed near the second groove, the orientation of the N and S poles of the magnetic component does not need to be distinguished.

20. The power tool according to claim 17, characterized in that, The positioning parameters include: a first positioning parameter and a second positioning parameter; The first positioning parameter includes the magnetic field strength detected by the magnetic induction component when the locking mechanism can engage with the second groove; the second positioning parameter includes the polarity of the magnetic component when the locking mechanism can engage with the second groove.

21. The power tool according to claim 20, characterized in that, The method for determining the magnetic induction component closest to the magnetic component based on a preset method includes: The motor is controlled to rotate by a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism; The magnetic induction component closest to the magnetic component is determined based on the positioning parameters.

22. The power tool according to claim 21, characterized in that, The process of obtaining the positioning parameters generated by the calibration agency includes: The detection voltage output by the calibration mechanism is obtained; the detection voltage is generated based on the magnetic field strength of the magnetic component. The detection voltage is converted into an AD value by an analog-to-digital converter, and the AD value is used to indicate the magnetic field strength. The positioning parameters are determined based on the AD value.

23. The power tool according to claim 22, characterized in that, The step of determining the magnetic induction component closest to the magnetic component based on the positioning parameters includes: If the standard AD value is greater than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the N pole of the magnetic component, and the second positioning parameter is the N pole. Obtain the AD values ​​corresponding to the multiple magnetic induction components within a preset angle or preset time of motor rotation, and determine the magnetic induction component corresponding to the maximum AD value as the magnetic induction component closest to the magnetic component; Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

24. The power tool according to claim 22, characterized in that, The step of determining the magnetic induction component closest to the magnetic component based on the positioning parameters includes: If the standard AD value is less than the average AD value when the motor rotates at a preset angle or within a preset time, it is determined that the magnetic induction component is closer to the S pole of the magnetic component, and the second positioning parameter is the S pole. Obtain the AD values ​​corresponding to the multiple magnetic induction components within a preset rotation angle or preset time period of the motor, and determine the magnetic induction component corresponding to the smallest AD value as the magnetic induction component closest to the magnetic component; Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor.

25. The power tool according to claim 22, characterized in that, The step of determining the magnetic induction component closest to the magnetic component based on the positioning parameters includes: Obtain the rate of change of AD value corresponding to the multiple magnetic induction components within a preset rotation angle or preset time period of the motor, and determine the magnetic induction component with the largest absolute value of the rate of change as the magnetic induction component closest to the magnetic component.

26. The power tool according to claim 16, characterized in that, The method for determining the magnetic induction component closest to the magnetic component based on a preset method includes: Read the torque value recorded at the end of the last torque adjustment of the power tool; The axial position of the torque adjustment mechanism is determined based on the torque value; The magnetic induction component closest to the magnetic component is determined based on the axial position of the torque adjustment mechanism.

27. The power tool according to claim 16, characterized in that, The power tool further includes a torque detection mechanism, which includes a pressure sensor electrically connected to the controller and located between the torque adjustment mechanism and the elastic element, for detecting the bias pressure exerted by the elastic element on the clutch mechanism.

28. The power tool according to claim 27, characterized in that, The method for determining the magnetic induction component closest to the magnetic component based on a preset method includes: Read the pressure value from the pressure sensor and determine the current torque value of the power tool based on the pressure value; The axial position of the torque adjustment mechanism is determined based on the torque value; The magnetic induction component closest to the magnetic component is determined based on the axial position of the torque adjustment mechanism.

29. The power tool according to claim 21, characterized in that, After the motor rotates by a preset angle or for a preset time, the torque adjustment mechanism can rotate at least 360° circumferentially.

30. The power tool according to claim 16, characterized in that, The power tool is stopped based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism, including: If the standard AD value is greater than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is greater than or equal to (maximum value - M) after the preset time. Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

31. The power tool according to claim 16, characterized in that, The step of controlling the power tool to stop according to the positioning parameters, so that the locking mechanism can lock the torque adjusting mechanism, includes: If the standard AD value is less than the average AD value when the motor rotates a preset angle or within a preset time, the power tool will be controlled to stop when the real-time collected AD value is less than or equal to (maximum value + M) after the preset time. Wherein, the standard AD value is the AD value corresponding to the detection voltage output by the magnetic induction component when it is just energized and there is no magnetic field influence, and the average AD value is the average of the maximum and minimum values ​​of the AD value during the preset rotation angle or preset time of the motor, M is greater than or equal to zero, and is used to compensate for the braking inertial displacement of the motor.

32. An AC torque-controlled wrench, characterized in that, The AC torque wrench includes: case; An output shaft, on which a first thread is provided; The drive mechanism includes a motor for outputting power. A power cord for connecting AC power to supply power to the motor; A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing; The controller, in response to a mode switching signal, controls the power tool to enter torque adjustment mode; When the power tool enters the torque adjustment mode, the controller determines the magnetic induction component closest to the magnetic component based on a preset method; The controller controls the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

33. A DC constant torque wrench, characterized in that, The DC constant torque wrench includes: case; An output shaft, on which a first thread is provided; A drive mechanism, comprising: a motor and a transmission assembly; the motor being connected to the transmission assembly to transmit power; A battery pack for supplying power to the motor; A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the transmission assembly drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing; The controller, in response to a mode switching signal, controls the power tool to enter torque adjustment mode; When the power tool enters the torque adjustment mode, the controller determines the magnetic induction component closest to the magnetic component based on a preset method; The controller controls the power tool to stop based on the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

34. A method for adjusting the torque of an electric tool, characterized in that, Applied to power tools, the power tools include: a clutch mechanism, a torque adjustment mechanism, a locking mechanism, and a calibration mechanism; The torque adjustment mechanism is used to adjust the clutch torque of the clutch mechanism, the locking mechanism is used to lock the torque adjustment mechanism to prevent circumferential rotation when adjusting the clutch torque, and the calibration mechanism is used to determine the position of the locking mechanism so that the locking mechanism can lock the torque adjustment mechanism. The torque adjustment method includes: After receiving the mode switching signal, the power tool is controlled to enter the torque adjustment mode; the motor of the power tool is controlled to rotate by a preset angle or a preset time to obtain the positioning parameters generated by the calibration mechanism; the power tool is controlled to stop according to the positioning parameters so that the locking mechanism can lock the torque adjustment mechanism. Alternatively, after acquiring a mode switching signal, the power tool is controlled to enter torque adjustment mode; the magnetic induction component closest to the magnetic component is determined based on a preset method; the power tool is controlled to stop according to the positioning parameters of the magnetic induction component closest to the magnetic component, so that the locking mechanism can lock the torque adjustment mechanism.

35. A power tool, characterized in that, The power tool includes: case; An output shaft, on which a first thread is provided; The drive mechanism includes a motor for outputting power. A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; The calibration mechanism includes a magnetic component and multiple magnetic induction components, the multiple magnetic components being disposed on the torque adjustment mechanism, and the magnetic induction components being disposed on the housing; The plurality of magnetic induction components are arranged sequentially in a straight line on the housing in the axial direction, and the effective sensing areas of the plurality of magnetic induction components overlap at least partially; Within the movable range of the magnetic component, the magnetic component can be effectively sensed by at least one of the plurality of magnetic sensing components.

36. The power tool according to claim 35, characterized in that, The effective sensing area of ​​the magnetic sensing component is determined based on the effective detection radius of the magnetic sensing component. The plurality of magnetic sensing components are arranged in a straight line and uniformly on the housing in the axial direction, and the effective detection range between two adjacent magnetic sensing components overlaps in diameter in the axial direction by 1%-50%.

37. The power tool according to claim 36, characterized in that, The effective detection range between two adjacent magnetic sensing components includes a first effective sensing area and a second effective sensing area, which are mirror-symmetric with respect to the radial direction.

38. The power tool according to claim 37, characterized in that, The first effective sensing area and the second effective sensing area are respectively controlled by the two adjacent magnetic sensing components to sense the magnetic component.

39. The power tool according to claim 38, characterized in that, The effective sensing area of ​​the magnetic induction component closest to the front end of the power tool in the axial direction is equal in size to the first effective sensing area in the direction closest to the front end of the power tool. The effective sensing area of ​​the magnetic induction component closest to the rear end of the power tool in the axial direction is equal in size to the second effective sensing area in the direction closest to the rear end of the power tool.

40. The power tool according to claim 36, characterized in that, The overlapping range of the effective detection ranges of two adjacent magnetic sensing components is simultaneously sensed by the two adjacent magnetic sensing components.

41. The power tool according to claim 40, characterized in that, When two adjacent magnetic sensing components simultaneously sense the magnetic component within the overlapping range and the preset magnetic field strength is met, it is confirmed that the magnetic component has reached the predetermined position.

42. The power tool according to claim 35, characterized in that, The magnetic sensing component includes a circuit board and a magnetic sensing element; the circuit board is electrically connected to the controller, and the magnetic sensing element is disposed on the circuit board.

43. The power tool according to claim 35, characterized in that, The magnetic sensing component includes: a circuit board and a magnetic sensing element; The multiple magnetic sensing components can share a single circuit board, which is axially disposed on the housing and electrically connected to the controller. The multiple magnetic sensing elements are arranged sequentially on the circuit board in a straight line in the axial direction.

44. The power tool according to claim 35, characterized in that, The torque adjustment mechanism is provided with a second groove; When the magnetic component is sensed by the magnetic induction component, the locking mechanism can engage with the second groove to prevent the torque adjustment mechanism from rotating with the output shaft and / or the motor.

45. The power tool according to claim 44, characterized in that, The magnetic component is disposed near the second groove, and the line containing the magnetic poles of the magnetic component is perpendicular to the magnetic induction component.

46. ​​The power tool according to claim 45, characterized in that, When the magnetic component is installed near the second groove, the orientation of the N and S poles of the magnetic component does not need to be distinguished.

47. The power tool according to claim 35, characterized in that, The clutch mechanism further includes a clutch assembly, wherein the first clutch disc or the second clutch disc is provided with a slide and a step portion, and the clutch assembly is located between the first clutch disc and the second clutch disc and is located on the slide.

48. The power tool according to claim 47, characterized in that, The clutch assembly is configured with multiple clutch steel balls; The first clutch disc has multiple first grooves, and the clutch steel ball is partially accommodated in the first grooves; the second clutch disc has a slide and a stepped portion; or, The second clutch disc is provided with a plurality of first grooves, and the clutch steel ball is partially accommodated in the first grooves; the first clutch disc is provided with a slide and a step.

49. The power tool according to claim 47, characterized in that, The clutch assembly is integrally formed with the first clutch disc or the second clutch disc, and the clutch assembly is configured as a hemispherical protrusion; The hemispherical protrusion is located on the first clutch disc, and the second clutch disc is provided with a slide and a stepped portion; or, The hemispherical protrusion is located on the second clutch disc, and the first clutch disc is provided with a slide and a step.

50. The power tool according to claim 48 or 49, characterized in that, The movable range of the magnetic component is determined according to the following formula: In the formula, X is the axial displacement distance of the magnetic component, T is the torque value of the power tool, K is the elastic coefficient of the elastic element, θ is the angle between the step portion on the clutch disc and the plane where the clutch disc is located, r is the rotation radius of the clutch assembly, and h is the height of the step portion. The movable range of the magnetic component is determined according to the formula and the torque adjustable range of the power tool.

51. An AC torque wrench, characterized in that, The AC torque wrench includes: case; An output shaft, on which a first thread is provided; The drive mechanism includes a motor for outputting power. A power cord for connecting AC power to supply power to the motor; A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the motor drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing; The plurality of magnetic induction components are arranged sequentially in a straight line on the housing in the axial direction, and the effective sensing areas of the plurality of magnetic induction components overlap at least partially; Within the movable range of the magnetic component, the magnetic component can be effectively sensed by at least one of the plurality of magnetic sensing components.

52. A DC constant torque wrench, characterized in that, The DC constant torque wrench includes: case; An output shaft, on which a first thread is provided; A drive mechanism, comprising: a motor and a transmission assembly; the motor being connected to the transmission assembly to transmit power; A battery pack for supplying power to the motor; A clutch mechanism, comprising: a first clutch disc, a second clutch disc, and an elastic element; the transmission assembly drives the first clutch disc to rotate, the first clutch disc can interruptibly transmit torque to the second clutch disc, the elastic element is arranged around the output shaft, and one end of the elastic element biases against the second clutch disc; A torque adjustment mechanism is biased by the other end of the elastic element. The torque adjustment mechanism has a second thread, and the torque adjustment mechanism adjusts the biasing force of the elastic element on the second clutch disc by the cooperation of the second thread with the first thread. A locking mechanism is used to selectively lock the torque adjusting mechanism so that the torque adjusting mechanism does not follow the rotation of the output shaft and / or the motor; A calibration mechanism, comprising a magnetic component and a magnetic induction component, wherein the magnetic component is disposed on the torque adjustment mechanism and the magnetic induction component is disposed on the housing; The plurality of magnetic induction components are arranged sequentially in a straight line on the housing in the axial direction, and the effective sensing areas of the plurality of magnetic induction components overlap at least partially; Within the movable range of the magnetic component, the magnetic component can be effectively sensed by at least one of the plurality of magnetic sensing components.

53. A power tool control method, characterized in that, An application is made to a power tool and an active adjustment component disposed outside the power tool. The power tool includes a housing, a drive shaft disposed inside the housing, and a torque adjustment assembly for adjusting the torque of the drive shaft. The torque adjustment assembly includes a clutch component, a torsion spring, and a torque adjustment mechanism. The torsion spring biases the clutch component. The torque adjustment mechanism includes a passive adjustment component that matches the active adjustment component and a torque adjustment disc. The housing has a window that penetrates the housing to expose a torque adjustment notch on the torque adjustment disc. The active adjustment component can pass through the window and the torque adjustment notch to cooperate with the passive adjustment component to adjust the biasing force of the torsion spring on the clutch component, thereby realizing torque adjustment of the power tool. The method includes: Once the predetermined trigger event is confirmed, enter torque adjustment mode; In the torque adjustment mode, a first operation is performed to stop the torque adjustment gap within the window range.

54. The method according to claim 53, characterized in that, The power tool also includes a cover for closing or opening the window; the cover is provided with a first magnetic component, and the housing is provided with a first magnetic induction component for sensing the first magnetic component; The method further includes: The first magnetic induction component senses the first magnetic component on the cover plate to determine whether the window is in a closed or open state. The determination of the occurrence of a predetermined trigger event and entry into the torque adjustment mode includes: In response to the window being open, the torque adjustment mode is entered.

55. The method according to claim 53, characterized in that, The determination of the occurrence of a predetermined trigger event and entry into the torque adjustment mode includes at least one of the following: Determine the predetermined operation for the trigger button of the power tool and enter the torque adjustment mode; It is determined that the power tool has received a predetermined instruction and enters the torque adjustment mode.

56. The method according to claim 54 or 55, characterized in that, The power tool further includes: a second magnetic component that rotates with the drive shaft and has a fixed relative position with the torque adjustment notch; a second magnetic induction component for sensing the second magnetic component is provided on the housing; when the second magnetic component is within the sensing range of the second magnetic induction component, the torque adjustment notch is located within the window range; Performing the first operation to stop the torque adjustment notch within the window range includes: Control the rotation of the drive shaft; In response to the second magnetic induction component sensing the second magnetic component, the drive shaft is controlled to stop rotating so that the torque adjustment notch stops within the window range.

57. The method according to claim 56, characterized in that, The control of the rotation of the drive shaft includes: The drive shaft is rotated based on a start signal triggered by the start / stop switch of the power tool.

58. The method according to claim 56, characterized in that, In the axial projection direction of the transmission shaft, with the axial projection of the transmission shaft center as the vertex of the included angle, the included angle between the axial projection of the torque adjustment notch and the axial projection of the second magnetic component is 180 degrees.

59. The method according to claim 54, characterized in that, When the window is open, the first magnetic component on the cover plate is within the sensing range of the first magnetic induction component; When the window is closed, the first magnetic component on the cover plate is outside the sensing range of the first magnetic induction component.

60. The method according to claim 54 or 55, characterized in that, Performing the first operation to stop the torque adjustment notch within the window range includes: Based on the start signal triggered by the start / stop switch of the power tool, the drive shaft is controlled to rotate at a first rotation speed; wherein, the first rotation speed is lower than a second rotation speed, and the second rotation speed is the speed at which the drive shaft is controlled to rotate by the start signal when the power tool is not in the torque adjustment mode. Based on the stop signal triggered by the start / stop switch, the drive shaft is controlled to stop rotating, so that the torque adjustment notch stops within the window range.

61. A power tool, characterized in that, The power tool includes a housing, a controller, a drive shaft disposed inside the housing, and a torque adjustment assembly for adjusting the torque of the drive shaft. The torque adjustment assembly includes a clutch component, a torque spring, and a torque adjustment mechanism. The torque spring biases the clutch component. The torque adjustment mechanism includes a passive adjustment component that matches an active adjustment component outside the power tool and a torque adjustment disc. The housing has a window that penetrates the housing to expose a torque adjustment notch on the torque adjustment disc. The active adjustment component can pass through the window and the torque adjustment notch to cooperate with the passive adjustment component to adjust the biasing force of the torque spring on the clutch component, thereby realizing the torque adjustment of the power tool. The controller is used for: Once the predetermined trigger event is confirmed, enter torque adjustment mode; In the torque adjustment mode, a first operation is performed to stop the torque adjustment gap within the window range.

62. The power tool according to claim 61, characterized in that, The power tool also includes a cover for closing or opening the window; the cover is provided with a first magnetic component, and the housing is provided with a first magnetic induction component for sensing the first magnetic component; The controller is used to: sense the first magnetic component on the cover plate through the first magnetic sensing component to determine whether the window is in a closed state or an open state; In response to the window being open, the torque adjustment mode is entered.

63. The power tool according to claim 61, characterized in that, The controller is used for at least one of the following: Determine the predetermined operation for the trigger button of the power tool and enter the torque adjustment mode; It is determined that the power tool has received a predetermined instruction and enters the torque adjustment mode.

64. The power tool according to claim 62 or 63, characterized in that, The power tool further includes: a second magnetic component that rotates with the drive shaft and has a fixed relative position with the torque adjustment notch; a second magnetic induction component for sensing the second magnetic component is provided on the housing; when the second magnetic component is within the sensing range of the second magnetic induction component, the torque adjustment notch is located within the window range; The controller is specifically used for: Control the rotation of the drive shaft; In response to the second magnetic induction component sensing the second magnetic component, the drive shaft is controlled to stop rotating so that the torque adjustment notch stops within the window range.

65. The power tool according to claim 64, characterized in that, The controller is specifically used to control the rotation of the drive shaft based on a start signal triggered by the start / stop switch of the power tool.

66. The power tool according to claim 64, characterized in that, In the axial projection direction of the transmission shaft, with the axial projection of the transmission shaft center as the vertex of the included angle, the included angle between the axial projection of the torque adjustment notch and the axial projection of the second magnetic component is 180 degrees.

67. The power tool according to claim 62, characterized in that, When the window is open, the first magnetic component on the cover plate is within the sensing range of the first magnetic induction component; When the window is closed, the first magnetic component on the cover plate is outside the sensing range of the first magnetic induction component.

68. The power tool according to claim 62 or 63, characterized in that, The controller is specifically used for: Based on the start signal triggered by the start / stop switch of the power tool, the drive shaft is controlled to rotate at a first rotation speed; wherein, the first rotation speed is lower than a second rotation speed, and the second rotation speed is the speed at which the drive shaft is controlled to rotate by the start signal when the power tool is not in the torque adjustment mode. Based on the stop signal triggered by the start / stop switch, the drive shaft is controlled to stop rotating, so that the torque adjustment notch stops within the window range.

Images