WO2023238593A1 - Système d'outil électrique - Google Patents

Système d'outil électrique Download PDF

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Publication number
WO2023238593A1
WO2023238593A1 PCT/JP2023/017704 JP2023017704W WO2023238593A1 WO 2023238593 A1 WO2023238593 A1 WO 2023238593A1 JP 2023017704 W JP2023017704 W JP 2023017704W WO 2023238593 A1 WO2023238593 A1 WO 2023238593A1
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WIPO (PCT)
Prior art keywords
unit
rotation speed
power tool
user
recommended
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PCT/JP2023/017704
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English (en)
Japanese (ja)
Inventor
敦 中村
浩一 橋本
信仁 細川
弘明 村上
Original Assignee
パナソニックホールディングス株式会社
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Publication of WO2023238593A1 publication Critical patent/WO2023238593A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for

Definitions

  • This disclosure generally relates to power tool systems.
  • the present disclosure more particularly relates to a power tool system that includes a portable tool body.
  • Patent Document 1 discloses a tightening tool and a tightening position management system.
  • the tightening position management system described in Patent Document 1 includes a torque wrench that is a tightening tool, and a management device that manages tightening position information.
  • the torque wrench includes a toggle mechanism and a torque value calculation section.
  • a toggle mechanism is a type of torque limiter that operates when the tightening torque reaches a set torque. Activation of the toggle mechanism is detected by a sensor. The torque value at which the toggle mechanism operates can be adjusted by means of an adjustment knob.
  • the torque value calculation unit calculates the torque value at which the fastening member is tightened by the torque wrench based on the electric signal from the strain gauge. When the toggle mechanism is activated, the torque value calculation unit determines the maximum torque value detected before the toggle mechanism is activated as the tightening torque value for the tightening operation.
  • the torque wrench outputs the tightening torque value used to tighten the fastening parts to the management device via wireless communication.
  • the tightening position is specified based on the signals output from the acceleration sensor, gyro sensor, and geomagnetic sensor, and the tightening position information indicating the tightening position is managed. Output to device.
  • the management device Upon receiving the tightening position information and tightening torque value output from the torque wrench, the management device manages the received tightening position information and tightening torque value.
  • An object of the present disclosure is to provide a power tool system that can prompt control according to the user's condition.
  • a power tool system includes a drive section, an operation section, a control section, a detection section, a tool body, and a recommended value calculation section.
  • the drive unit includes a motor, and rotates the tip tool by rotation of the motor.
  • the operation section is operated by a user, and the control section controls the operation of the drive section in response to the user's operation on the operation section.
  • the detection unit detects a physical quantity related to at least one of the user's skill level and physical condition, which is obtained in response to the user's operation on the operation unit.
  • the tool main body is portable and holds the drive section, the operation section, the control section, and the detection section.
  • the recommended value calculation section calculates a recommended value of a control parameter related to the operation of the drive section based on the physical quantity detected by the detection section.
  • FIG. 1 is a block diagram of a power tool system according to an embodiment.
  • FIG. 2 is a system configuration diagram of the power tool system same as above.
  • FIG. 3 is a schematic diagram of a power tool used in the above power tool system.
  • FIG. 4 is a graph for explaining a method for determining recommended values by the power tool system described above.
  • FIG. 5 is a flowchart illustrating the operation of the above power tool system.
  • FIG. 6 is a block diagram of a power tool system according to modification 1.
  • FIG. 7 is a block diagram of a power tool system according to modification 2.
  • FIG. 8 is a block diagram of a power tool system according to modification 3.
  • a power tool system 100 includes a power tool 1 and a processing device 9.
  • the power tool 1 includes a control section 11, an operation section 12, a drive section 13, a detection section 15, and a tool body 10.
  • the drive unit 13 includes a motor 131.
  • the drive unit 13 rotates the tip tool 20 (see FIG. 3) by rotation of the motor 131.
  • the operation unit 12 is operated by a user (operator).
  • the control unit 11 controls the operation of the drive unit 13 in response to a user's operation on the operation unit 12 .
  • the detection unit 15 detects a physical quantity obtained in response to a user's operation on the operation unit 12.
  • the physical quantity is a quantity related to at least one of the user's skill level and physical condition.
  • the tool main body 10 is portable and holds a drive section 13, an operation section 12, a control section 11, and a detection section 15.
  • the processing device 9 includes a recommended value calculation section 921.
  • the recommended value calculation unit 921 calculates recommended values of control parameters related to the operation of the drive unit 13 based on the physical quantities detected by the detection unit 15.
  • the recommended value calculation unit 921 obtains recommended values for the control parameters so that user status information including at least one of the user's skill level and physical condition is reflected.
  • the power tool system 100 includes a drive section 13, an operation section 12, a control section 11, a detection section 15, a tool main body 10, and a recommended value calculation section 921.
  • the drive unit 13 includes a motor 131, and rotates the tip tool 20 by rotation of the motor 131.
  • the operation unit 12 is operated by a user.
  • the control unit 11 controls the operation of the drive unit 13 in response to a user's operation on the operation unit 12 .
  • the detection unit 15 detects a physical quantity related to at least one of the user's skill level and physical condition, which is obtained in response to the user's operation on the operation unit 12 .
  • the tool main body 10 is portable and holds a drive section 13, an operation section 12, a control section 11, and a detection section 15.
  • the recommended value calculation unit 921 calculates recommended values of control parameters related to the operation of the drive unit 13 based on the physical quantities detected by the detection unit 15.
  • the recommended value calculation unit 921 calculates the recommended value of the control parameter based on the physical quantity related to at least one of the user's skill level and physical condition detected by the detection unit 15. I'm looking for it. Therefore, in the power tool system 100 of the present embodiment, when the user uses the power tool 1, the recommended values of the control parameters obtained by the recommended value calculation unit 921 are used to determine the user's state such as skill level or physical condition. (in this embodiment, the control unit 11 of the power tool 1) can be prompted to perform an operation according to the following. That is, according to the power tool system 100 of this embodiment, it is possible to prompt control according to the user's condition.
  • the power tool system 100 includes the power tool 1 and the processing device 9.
  • the power tool 1 is a power tool for businesses used in factories, construction sites, etc., for example.
  • the power tool 1 is used to tighten a workpiece (for example, a solar panel, etc.) to a workpiece (for example, a frame, etc.) using a plurality of tightening members (for example, screws, bolts, etc.) according to a design drawing, a work instruction, etc., for example. used to do.
  • An example of this type of power tool 1 is an electric impact driver that tightens by rotating a tightening member and applying impact force.
  • the power tool 1 is not limited to an electric impact driver, but may be an electric impact wrench, an electric drill driver that does not apply impact force, an electric torque wrench, or the like.
  • the power tool 1 includes a tool body 10, a control section 11, an operation section 12, a drive section 13, a sensor section 14, a detection section 15, a communication section 16, It includes a storage section 17 and a power supply section 18.
  • the tool body 10 holds a control section 11, an operation section 12, a drive section 13, a sensor section 14, a detection section 15, a communication section 16, a storage section 17, and a power supply section 18.
  • the tool main body 10 includes a cylindrical body portion 101 and a grip portion 102 that protrudes from the circumferential surface of the body portion 101 in the radial direction.
  • An output shaft 133 of the drive section 13 protrudes from one end of the body section 101 in the axial direction.
  • a tip tool mounting portion 134 is provided at the tip of the output shaft 133.
  • the tip tool mounting portion 134 includes, for example, a chuck.
  • a tip tool 20 (for example, a driver bit, a socket bit, etc.) that matches the member to be worked on is detachably attached to the tip tool attachment portion 134 .
  • a battery pack 103 containing a power supply section 18 housed in a resin case is detachably attached to one end (lower end in FIG. 3) of the grip section 102.
  • the control unit 11 controls the operations of the drive unit 13, sensor unit 14, detection unit 15, communication unit 16, etc.
  • the control unit 11 is realized by a computer system having one or more processors and memory.
  • the computer system functions as the control unit 11 by having one or more processors execute programs stored in memory.
  • the program is pre-recorded in the memory of the control unit 11 here, it may also be provided via a telecommunications line such as the Internet or by being recorded on a non-temporary recording medium such as a memory card.
  • the control unit 11 may be configured with, for example, an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit).
  • a computer system (circuit board 110, etc.) constituting the control section 11 is housed inside the grip section 102, for example.
  • the operating section 12 includes a trigger switch 121 provided on the grip section 102.
  • a trigger switch 121 When the trigger switch 121 is operated by the user, an operation signal proportional to the amount of retraction (operation amount) of the trigger switch 121 is output to the control unit 11 .
  • the control section 11 adjusts the rotation speed of the motor 131 of the drive section 13 so that the motor 131 of the drive section 13 rotates at a speed according to the operation signal from the operation section 12 .
  • the rotation speed of the motor 131 is the rotation speed of the motor 131, and means the number of times (speed) [rpm] that the rotor of the motor 131 rotates per unit time.
  • the drive unit 13 includes a motor 131, an impact mechanism 132, an output shaft 133, and a tip tool attachment part 134.
  • the operation (rotation) of the motor 131 is controlled by the control unit 11.
  • the rotation of the output shaft of the motor 131 is transmitted to the output shaft 133 via the impact mechanism 132. If the output torque is below a predetermined level, the impact mechanism 132 is configured to decelerate the rotation of the output shaft of the motor 131 and transmit it to the output shaft 133. When the output torque exceeds a predetermined level, the impact mechanism 132 is configured to apply impact force to the output shaft 133 to rotate the output shaft 133.
  • the motor 131 and impact mechanism 132 are housed within the body portion 101.
  • the sensor unit 14 measures the tightening torque by the output shaft 133.
  • the sensor section 14 includes, for example, a magnetostrictive torque sensor 141 attached to the output shaft 133.
  • the magnetostrictive torque sensor 141 uses a coil installed in a non-rotating part to detect a change in magnetic permeability in response to distortion caused by applying torque to the output shaft 133, and outputs a voltage signal proportional to the distortion.
  • the sensor unit 14 measures the torque applied to the output shaft 133. That is, the sensor unit 14 measures the torque (tightening torque) that the electric tool 1 applies to the tightening member.
  • the sensor unit 14 outputs the measured torque (tightening torque) to the control unit 11.
  • the sensor unit 14 may measure the torque applied to the output shaft of the motor 131.
  • the sensor unit 14 may measure the tightening torque applied to the output shaft 133 based on the measured value of the torque applied to the output shaft of the motor 131, the reduction ratio of the reduction mechanism, and the like.
  • the sensor section 14 is not limited to having the magnetostrictive torque sensor 141, and the means for realizing the sensor section 14 can be changed as appropriate.
  • the sensor unit 14 may measure the torque applied to the output shaft of the motor 131 by detecting the current flowing through the motor 131.
  • the sensor section 14 may count the number of hits applied to the output shaft 133 by the impact mechanism 132 using a vibration sensor, and determine the tightening torque from the number of hits.
  • the control unit 11 includes a drive control unit 111 that controls the operation of the drive unit 13 (motor 131).
  • the drive control section 111 drives the motor 131 according to an operation signal input from the operation section 12.
  • the drive control section 111 includes an inverter circuit that converts the voltage from the power supply section 18 into a drive voltage for the motor 131.
  • the drive voltage is, for example, a three-phase AC voltage including a U-phase voltage, a V-phase voltage, and a W-phase voltage.
  • the inverter circuit can be realized using, for example, a PWM inverter and a PWM converter.
  • the PWM converter generates a pulse width modulated PWM signal according to a target value (voltage command value) of the drive voltage.
  • the PWM inverter drives the motor 131 by applying a drive voltage to the motor 131 according to this PWM signal.
  • a PWM inverter includes, for example, a three-phase half-bridge circuit and a driver.
  • a driver turns on/off switching elements in each half-bridge circuit according to a PWM signal, so that a drive voltage according to a voltage command value is applied to the motor 131.
  • the drive control unit 111 controls the drive unit 13 so that the magnitude of the tightening torque of the tightening member becomes the torque setting value. For example, the drive control unit 111 stops the rotation of the motor 131 of the drive unit 13 when the value of the tightening torque measured by the sensor unit 14 reaches a preset torque setting value. Note that the torque setting value can be changed, and is changed by the control unit 11 based on a setting signal transmitted from the processing device 9 in response to a user's operation, for example.
  • the drive control section 111 controls the operation of the drive section 13 so that the rotation speed of the motor 131 does not exceed the maximum rotation speed. That is, the drive control unit 111 controls the operation of the drive unit 13 so that the rotational speed of the motor 131 does not exceed the maximum rotational speed even if the amount of retraction of the trigger switch 121 is the maximum detectable value.
  • the maximum rotation speed of the motor 131 is a set value of the upper limit of the rotation speed of the motor 131.
  • control section 11 further includes a detection information processing section 112.
  • the detected information processing unit 112 processes the physical quantity detected by the detection unit 15 and related to at least one of the user's skill level and physical condition.
  • control unit 11 further includes a workload determination unit 113.
  • the workload determining unit 113 calculates the cumulative value of the time during which the operating unit 12 was operated within a predetermined period.
  • the predetermined period is, for example, one day starting from midnight.
  • a [m/s 2 ] indicates a triaxial composite value of frequency-corrected vibration acceleration effective values, and is determined according to the specifications of the power tool 1. Further, T [time] indicates the vibration exposure time per day.
  • the work amount determination unit 113 determines whether the operation unit 12 (trigger switch 121) is operated when the cumulative value of the operating time of the operation unit 12 within a predetermined period exceeds a reference value. Rotation of the motor 131 is stopped regardless of the presence or absence of the motor.
  • the reference value is, for example, the smaller of the vibration exposure limit time determined from the triaxial composite value a of the frequency-corrected vibration acceleration effective value of the power tool 1 and 2 [hours]. Note that the reference value is not limited to this, and may be a value smaller than the vibration exposure limit time.
  • the standard value is determined based on the daily vibration exposure countermeasure value (2.5 [m/s 2 ]) instead of the daily vibration exposure limit value (5.0 [m/s 2 ]). Good too.
  • the reference value may be settable by the user.
  • the power tool system 100 includes the work amount determining unit 113, it becomes possible for the user to manage the usage time of the power tool 1, and prevent the user from using the power tool 1 beyond the vibration exposure limit time. This makes it possible to suppress the situation in which this occurs, and it becomes possible to reduce the fatigue accumulated in the user.
  • the detection unit 15 detects a physical quantity related to at least one of the user's skill level and physical condition.
  • the physical quantity detected by the detection unit 15 is a physical quantity obtained in response to the user's operation on the operation unit 12 (when the user is operating the operation unit 12).
  • the detection section 15 includes a vibration measurement section 151.
  • the vibration measurement unit 151 measures parameters related to vibration of the tool body 10.
  • the vibration measurement unit 151 measures parameters related to vibrations of the tool body 10, particularly when the drive unit 13 is operating due to a user's operation on the operation unit 12, that is, when the motor 131 is rotating.
  • the vibration measurement unit 151 includes, for example, a vibration sensor held in the tool body 10.
  • the vibration sensor measures the acceleration of the tool body 10, for example. That is, the vibration measurement unit 151 measures the acceleration of the tool body 10 as a parameter of the vibration of the tool body 10.
  • the vibration measurement unit 151 (vibration sensor) may measure the displacement (amplitude) or speed of vibration of the tool body 10.
  • the vibration sensor may be, for example, a piezoelectric element type acceleration sensor or a capacitance type sensor.
  • the vibration measurement unit 151 outputs the detected physical quantity (acceleration) to the control unit 11.
  • the detection unit 15 further includes a rotation speed detection unit 152.
  • the rotation speed detection unit 152 detects the rotation speed (rotation speed) of the output shaft 133.
  • the rotation speed detection unit 152 converts the rotation speed of the motor 131 into the rotation speed of the output shaft 133 based on, for example, a magnetic rotary encoder or Hall element IC that detects the rotation speed of the motor 131, and a reduction ratio of a reduction mechanism. and an arithmetic unit.
  • the invention is not limited to this, and when the drive control unit 111 controls the operation of the motor 131 by vector control, the rotation speed detection unit 152 uses the value of the d-axis current (excitation current) calculated in the vector control, etc.
  • the rotation speed of the motor 131 may also be detected.
  • the rotation speed detection unit 152 may directly detect the rotation speed of the output shaft 133.
  • the rotation speed detection section 152 outputs the detected physical quantity (rotation speed) to the control section 11.
  • the detection information processing unit 112 of the control unit 11 generates detection data based on the physical quantity detected by the detection unit 15.
  • the detection information processing section 112 links the measured value of the rotation speed of the output shaft 133 received from the rotation speed detection section 152 and the measured value of the acceleration of the tool body 10 received from the vibration measurement section 151.
  • the detection information processing unit 112 calculates the average value of the rotation speed of the motor 131 from when the trigger switch 121 is turned on until it is turned off.
  • the detection information processing unit 112 also obtains a deviation (dispersion) in the acceleration of the tool body 10 from when the trigger switch 121 is turned on until it is turned off.
  • the detection information processing section 112 obtains data (detection data) in which the obtained average value of the rotation speed and the deviation of the acceleration are linked to each other, and stores the data in the storage section 17 .
  • the detection data obtained by the detection information processing unit 112 is not limited to this, and for example, instead of the average value of the rotation speed, the maximum value, median value, minimum value, etc. of the rotation speed may be used. Further, the detection information processing unit 112 may obtain the detection data using the maximum value or average value of acceleration, the maximum value or average value of vibration displacement, or the like instead of the deviation of acceleration.
  • the communication unit 16 is, for example, a communication module for wirelessly communicating with the processing device 9.
  • the communication unit 16 performs short-range wireless communication based on, for example, ZigBee (registered trademark).
  • the communication unit 16 transmits the detection data stored in the storage unit 17 to the processing device 9 using a wireless communication method.
  • the control unit 11 temporarily stores detected data in a memory such as a RAM (Random Access Memory) that the control unit 11 has, and the communication unit 16 stores detected data temporarily stored in a memory such as a RAM. may be transmitted to the processing device 9 using a wireless communication method.
  • the wireless communication method between the communication unit 16 and the processing device 9 is, for example, a specified low power wireless station in the 920 MHz band (a wireless station that does not require a license), Wi-Fi (registered trademark), Bluetooth (registered trademark), etc. ), etc., and may be wireless communication using radio waves as a medium. Further, the communication unit 16 may be connected to the processing device 9 via a communication line and transmit the detection data to the processing device 9 using a wired communication method.
  • the storage unit 17 includes, for example, a ROM (Read Only Memory), a nonvolatile memory, and the like.
  • Non-volatile memory includes, for example, EEPROM or flash memory.
  • the storage unit 17 stores a control program executed by the control unit 11.
  • the storage unit 17 also stores the detection data obtained by the detection information processing unit 112.
  • the power supply unit 18 includes a storage battery. Power supply section 18 is housed within battery pack 103.
  • the battery pack 103 is configured by housing a power supply unit 18 in a resin case. By removing the battery pack 103 from the tool body 10 and connecting the removed battery pack 103 to a charger, the storage battery of the power supply unit 18 can be charged.
  • the power supply unit 18 supplies power necessary for operation to the electric circuit including the control unit 11 and the motor 131 using the power stored in the storage battery.
  • the power supply unit 18 and the battery pack 103 are included in the components of the power tool 1 in this embodiment, they may not be included in the components of the power tool 1.
  • Processing device 9 determines the recommended maximum rotation speed based on the detection data.
  • the form of the processing device 9 is not particularly limited.
  • the processing device 9 may be any device that can communicate directly or indirectly with the power tool 1 and can execute desired processing according to a predetermined program.
  • the processing device 9 may be, for example, a glasses-type, bracelet-type, or other wearable terminal worn by the user.
  • the processing device 9 may be, for example, a portable information terminal such as a smartphone or a tablet terminal.
  • the processing device 9 may be, for example, a stationary information terminal such as a notebook computer or a desktop computer.
  • the processing device 9 may be a server device (which may include a cloud computer).
  • the processing device 9 includes a communication section 91 and a control section 92.
  • the communication unit 91 is a communication module for communicating with the communication unit 16 of the power tool 1.
  • the communication unit 91 performs short-range wireless communication based on, for example, ZigBee (registered trademark).
  • the communication unit 91 receives detection data from the communication unit 16 of the power tool 1 . Furthermore, the communication unit 91 transmits the recommended data generated by the control unit 92 to the communication unit 16 of the power tool 1.
  • the control unit 92 controls the operation of the communication unit 91 and the like.
  • the control unit 92 is realized by a computer system having one or more processors and memory.
  • the computer system functions as the control unit 92 by having one or more processors execute programs stored in memory.
  • the program is pre-recorded in the memory of the control unit 92 here, it may also be provided via a telecommunications line such as the Internet or by being recorded on a non-temporary recording medium such as a memory card.
  • control section 92 includes a recommended value calculation section 921.
  • the recommended value calculation unit 921 calculates recommended values of control parameters regarding the operation of the drive unit 13 of the power tool 1 based on the detection data received from the power tool 1. That is, the recommended value calculation unit 921 calculates the recommended value of the control parameter based on the physical quantity detected by the detection unit 15. Here, the recommended value calculation unit 921 sets the recommended value of the control parameter based on the relationship between the rotation speed of the output shaft 133 (the rotation speed of the tip tool 20) and the vibration-related parameters of the tool body 10, which are included in the detection data. , a recommended maximum rotation speed, which is a recommended value of the maximum rotation speed of the motor 131, is determined.
  • the recommended value calculating section 921 includes a rank determining section 922 and a recommended value determining section 923.
  • the rank determination unit 922 determines the rank of the user based on the detection data received from the power tool 1.
  • a user's rank is an index indicating the state of the user, such as the user's skill level and physical condition.
  • the user's skill level is an index indicating how proficient the user is in using the power tool 1.
  • the rank determination unit 922 determines the user's rank using a graph showing the correspondence between the rotation speed (for example, average rotation speed) of the output shaft 133 and the vibration parameter (for example, acceleration deviation) of the tool body 10. decide.
  • FIG. 4 shows an example of a graph that serves as a reference for determining a user's rank.
  • the horizontal axis represents the average rotational speed of the output shaft 133
  • the vertical axis represents the deviation in acceleration of the tool body 10 (denoted as "vibration" in FIG. 4).
  • Region A1 in FIG. 4 is a region in which vibration (deviation in acceleration) of the tool body 10 is suppressed to a small level even if the rotation speed of the output shaft 133 is high. That is, when the coordinate values indicated by the detection data of a certain user are located within the area A1, the user can suppress the deviation of the acceleration of the tool body 10 to a small value even if the rotation speed of the output shaft 133 is large. In other words, it can be said that the user is a person who is accustomed to using the power tool 1 (an expert) or a person who has a low degree of fatigue. In that case, the rank determining unit 922 determines the rank of this user as advanced level (A1).
  • Region A3 in FIG. 4 is a region where the vibration of the tool body 10 increases as the rotational speed of the output shaft 133 increases.
  • the user is a user for whom the deviation of the acceleration of the tool body 10 increases as the rotation speed of the output shaft 133 increases.
  • the rank determining unit 922 determines the rank of this user to be beginner level (A3).
  • Area A2 in FIG. 4 is an area between area A1 and area A3.
  • the rank determining unit 922 determines that the user is a person who is accustomed to using the power tool 1 to some extent (intermediate user) or has a medium degree of fatigue. The rank of this user is determined to be intermediate level (A2).
  • the recommended value determining unit 923 determines a recommended maximum rotation speed that is a recommended value of the maximum rotation speed of the motor 131 (the upper limit of the rotation speed of the motor 131). The recommended value determining unit 923 determines the recommended maximum rotation speed based on the user's rank determined by the rank determining unit 922. The recommended value determination unit 923 determines the recommended maximum rotation speed based on the correspondence table shown in Table 1, for example.
  • X1, X2, and X3 indicate the recommended maximum rotation speed (numerical value), and X1>X2>X3. That is, the recommended value determination unit 923 increases the recommended maximum rotation speed as the user's rank is higher (the higher the user's skill level and the lower the fatigue level).
  • the recommended value calculation unit 921 calculates the recommended value of the control parameter related to the operation of the drive unit 13 (for example, the recommended maximum (rotation speed).
  • the control unit 92 transmits recommended data including the recommended maximum rotation speed (value) obtained by the recommended value calculation unit 921 to the power tool 1 via the communication unit 91.
  • the control unit 11 of the power tool 1 sets the recommended maximum rotation speed included in the recommended data as the maximum rotation speed. As described above, the control unit 11 (drive control unit 111) adjusts the tightening torque of the tightening member 200 to the torque setting value so that the rotation speed of the motor 131 does not exceed the maximum rotation speed (that is, the recommended maximum rotation speed). The operation of the drive unit 13 is controlled so that
  • the control unit 11 of the power tool 1 controls the operation of the drive unit 13 based on the recommended value of the control parameter determined by the recommended value calculation unit 921.
  • the control parameters include the maximum rotation speed, which is the upper limit of the rotation speed of the motor 131.
  • the recommended value calculation unit 921 calculates a recommended maximum rotational speed, which is a recommended value of the maximum rotational speed, based on the physical quantity detected by the detection unit 15.
  • the control unit 11 controls the operation of the drive unit 13 so that the rotation speed of the motor 131 does not exceed the recommended maximum rotation speed determined by the recommended value calculation unit 921.
  • the motor 131 directly applies power to the tightening member.
  • torque is also imparted by the inertia of the rotating bodies (the rotor of the motor 131, the impact mechanism 132, the output shaft 133, etc.) included in the power tool 1.
  • the drive control unit 111 controls the drive unit 13 so that the tightening torque of the tightening member becomes the torque setting value as described above, but in this control, the torque given by the inertia of the rotating body is also controlled.
  • the drive unit 13 is controlled in consideration.
  • the recommended maximum rotation speed is changed according to the user's rank, thereby suppressing the occurrence of wobbling of the tool body 10 when the tightening member is seated.
  • the rotation speed of the motor 131 is low, even if the user has low skill level or is highly fatigued, it is easy for the user to suppress the occurrence of wobbling (kickback, etc.) of the tool body 10 when the tightening member is seated. It is from. This makes it possible to improve the accuracy of the tightening torque of the tightening member.
  • the control unit 11 calculates the recommended value (recommended maximum rotation speed) of the control parameter obtained by the recommended value calculation unit 921.
  • the driving unit 13 is operated using the following. Thereby, according to the power tool system 100 of the present embodiment, it is possible to cause the power tool 1 to perform control according to the user's condition.
  • the power tool 1 When a user performs work using the power tool 1, the power tool 1 obtains the recommended maximum rotation speed (recommended value) in advance and sets the maximum rotation speed (ST1).
  • the recommended value is a value sent from the processing device 9.
  • the user sets the power tool 1 at a predetermined position and turns on the trigger switch 121 (ST2).
  • the control unit 11 (drive control unit 111) prevents the rotation speed of the motor 131 from exceeding the maximum rotation speed (recommended maximum rotation speed) based on the amount of pull of the trigger switch 121. , controls the drive unit 13. Thereby, the user performs work using the power tool 1 (ST3).
  • the control unit 11 of the power tool 1 determines at any time whether the trigger switch 121 is turned off (ST4). Further, while the trigger switch 121 is maintained on (ST4: No), the control unit 11 determines at any time whether the tightening torque detected by the sensor unit 14 has reached the torque setting value ( ST5). In the state where the tightening torque has not reached the torque setting value (ST5: No), the control unit 11 (work amount determination unit 113) determines whether the cumulative value of the operation time of the operation unit 12 has reached the reference value. Judgment is made at any time (ST6). If the integrated value of the operation time has not reached the reference value (ST6: No), the control unit 11 continues the operation of the drive unit 13.
  • the control unit 11 stops supplying current to the motor 131 and stops the operation of the drive unit 13 (ST7). Further, when the tightening torque reaches the torque setting value (ST5: Yes), the control section 11 stops the operation of the drive section 13 (ST7). Furthermore, even if the trigger switch 121 is turned on and the tightening torque has not reached the torque setting value, if the cumulative value of the operation time reaches the reference value (ST6: Yes), the control unit 11 will forcefully drive the tightening torque. The operation of the section 13 is stopped (ST7).
  • the control unit 11 performs detection based on the measured value of the rotational speed of the output shaft 133 and the measured value of the parameter (acceleration) related to vibration of the tool body 10.
  • Data is acquired (ST8) and the detected data is transmitted to the processing device 9.
  • the processing device 9 determines the user's rank based on the detection data (ST9), determines the recommended maximum rotation speed (recommended value) (ST10), and creates a recommendation including the determined recommended maximum rotation speed.
  • the power tool 1 sets the recommended maximum rotation speed included in the received recommendation data as the maximum rotation speed (ST11), and controls the drive unit 13 based on this maximum rotation speed in the next operation.
  • the operation of the power tool system 100 is not limited to the flowchart in FIG. 5, and the order of steps may be changed, or some steps may be omitted or added.
  • the control unit 11 does not have to forcibly stop the operation of the drive unit 13 when the integrated value of the operation time reaches the reference value in step ST6 (ST6: Yes). Instead, when the cumulative value of the operation time reaches the reference value, the control unit 11 controls the operation time even if the trigger switch 121 is turned on again after the drive unit 13 is stopped due to, for example, the trigger switch 121 being turned off. Control may be performed such that the drive unit 13 is not operated.
  • (4.1) Modification example 1 A power tool system 100A of this modification will be described with reference to FIG. 6.
  • the power tool system 100A of this modification differs from the power tool system 100 of the above-described embodiment mainly in the method by which the rank determination unit 922 determines the user's rank.
  • description of the same configuration as the power tool system 100 of the above embodiment may be omitted as appropriate.
  • the detection unit 15A of the power tool 1A includes an operation speed measurement unit 153.
  • the operation speed measurement unit 153 measures the speed at which the user operates the operation unit 12, in this case, the speed at which the user pulls the trigger switch 121. More specifically, the operation speed measuring unit 153 measures the time from when the user starts pulling the trigger switch 121 to when the pulling is completed (hereinafter also referred to as "operation time").
  • the point in time when the trigger switch 121 starts to be pulled is, for example, the point in time when the amount of pull in the trigger switch 121 reaches a detectable minimum value in one pull operation of the trigger switch 121.
  • the time when the retraction of the trigger switch 121 is completed is, for example, the time when the amount of retraction of the trigger switch 121 reaches the maximum detectable value in one pull operation of the trigger switch 121.
  • the detection information processing unit 112 of the control unit 11 stores the operation time (reciprocal of the operation speed) measured by the operation speed measurement unit 153 in the storage unit 17 as detection data, and sends it to the processing device 9 via the communication unit 16. Let it be sent
  • the rank determination unit 922 of the recommended value calculation unit 921 of the processing device 9 determines the rank of the user based on a plurality of threshold values, for example.
  • the threshold value is a numerical value that is compared with the operation time indicating the operation speed (pulling speed of the trigger switch 121).
  • the rank determining unit 922 determines the rank of this user as advanced level (A1). This is because if the operation time is short and the operation speed is high, the user can be considered to be a person who is accustomed to using the power tool 1A (an expert) or a person with a low degree of fatigue. Further, for example, when the operation time is equal to or greater than the first threshold value and smaller than the second threshold value, the rank determining unit 922 determines the rank of this user to be intermediate level (A2). Furthermore, for example, when the operation time is equal to or greater than the second threshold, the rank determining unit 922 determines the rank of this user to be beginner level (A3).
  • the recommended value determination unit 923 determines the recommended maximum rotation speed, for example, according to Table 1.
  • the control unit 11 drive control unit 111 of the power tool 1A controls the drive unit 13 so that the rotation speed of the motor 131 does not exceed the recommended maximum rotation speed.
  • the operation speed measurement unit 153 may measure the speed at which the trigger switch 121 is pulled (for example, the maximum value, average value, etc. of the speed). Furthermore, the rank determination unit 922 may convert the operation time into an operation speed and compare it with a predetermined threshold (a threshold with which the operation speed is compared).
  • (4.2) Modification 2 A power tool system 100B of this modification will be described with reference to FIG. 7.
  • the power tool system 100B of this modification differs from the power tool system 100 of the above-described embodiment mainly in the method by which the rank determination unit 922 determines the user's rank.
  • description of the same configuration as the power tool system 100 of the above embodiment may be omitted as appropriate.
  • the detection unit 15B of the power tool 1B includes an operation interval measurement unit 154.
  • the operation interval measurement unit 154 measures the time interval or frequency of operations when the operation unit 12 is repeatedly operated.
  • the operation interval measurement unit 154 measures the time interval at which the user turns on the trigger switch 121 (the time from when the trigger switch 121 is turned on, when it is turned off, until when it is turned on again).
  • "turning on the trigger switch 121” may mean that the amount of retraction of the trigger switch 121 reaches a detectable maximum value.
  • the detection information processing unit 112 of the control unit 11 stores the time measured by the operation interval measurement unit 154 (hereinafter also referred to as “on interval”) in the storage unit 17 as detection data, and processes it via the communication unit 16. It is transmitted to the device 9.
  • the work of tightening a plurality of tightening members on one work object may be repeatedly performed in an assembly line manner.
  • the user will perform a task of tightening a plurality of tightening members within a certain takt time for one work object.
  • the time interval at which the trigger switch 121 is turned on reflects the time required for the user to complete the task of tightening multiple tightening members, and the time interval at which the trigger switch 121 is turned on will reflect the time required for the user to complete the task of tightening multiple tightening members, and will depend on the user's skill level, fatigue level, etc. It can be said that it reflects the state of the user. Therefore, in the power tool system 100B of this modification, this "on interval" is used as a parameter indicating the user's state.
  • the rank determination unit 922 of the recommended value calculation unit 921 of the processing device 9 determines the rank of the user based on a plurality of threshold values, for example.
  • the threshold is a numerical value that is compared to the on-interval value.
  • the rank determining unit 922 determines the rank of this user as advanced level (A1). This means that if the value of the on-interval is small, the user can complete the work in a short time, so the user is a person who is accustomed to using the power tool 1B (skilled person) or a person with a low degree of fatigue. This is because it can be considered as Furthermore, for example, when the value of the on-interval is greater than or equal to the first threshold and smaller than the second threshold, the rank determining unit 922 determines the rank of this user to be intermediate level (A2). Furthermore, for example, when the value of the on-interval is equal to or greater than the second threshold, the rank determining unit 922 determines the rank of this user to be beginner level (A3).
  • the recommended value determination unit 923 determines the recommended maximum rotation speed, for example, according to Table 1.
  • the control unit 11 drive control unit 111 of the power tool 1B controls the drive unit 13 so that the rotation speed of the motor 131 does not exceed the recommended maximum rotation speed.
  • the operation interval measurement unit 154 measures the time interval at which the user turns off the trigger switch 121 (from when the trigger switch 121 is turned off, after the trigger switch 121 is turned on, until the next time when the trigger switch 121 is turned off). time) may be measured.
  • the operation interval measuring unit 154 may measure the total working time for one work object (the time from starting to completing the work of tightening a plurality of fastening members).
  • a power tool system 100C of this modification will be described with reference to FIG. 8.
  • the power tool system 100C of this modification differs from the power tool system 100 of the above embodiment mainly in that it includes a notification section 19.
  • description of the same configuration as the power tool system 100 of the above embodiment may be omitted as appropriate.
  • the notification unit 19 includes, for example, an LED (Light Emitting Diode).
  • the emitted light color of the LED is, for example, red.
  • the LED is provided, for example, at the end of the body portion 101 of the tool body 10 on the opposite side to the output shaft 133 so that the user can easily see the LED during work.
  • the control unit 11 (drive control unit 111) of the power tool 1C does not perform control to suppress the rotation speed of the motor 131 to below the recommended maximum rotation speed. Instead, when it is detected that the rotation speed of the motor 131 exceeds the recommended maximum rotation speed determined by the recommended value calculation unit 921 in response to a pulling operation on the trigger switch 121, the control unit 11 causes, for example, an LED to emit light. Then, the notification unit 19 notifies the user. Thereby, the user can be urged to refrain from controlling the rotation speed of the motor 131 to exceed the recommended maximum rotation speed. In short, the power tool system 100C of this modification can also prompt the user (in this modification, the user) to perform control according to the user's condition.
  • the power tool 1C may include a display section that can display a recommended value (recommended maximum rotation speed).
  • the display unit may be able to display other information such as a measured value of the rotation speed of the motor 131 in addition to the recommended maximum rotation speed.
  • the control unit 11 of the power tool 1C may be able to switch between the first mode and the second mode.
  • the first mode is a mode in which the control section 11 (drive control section 111) controls the drive section 13 so that the rotation speed of the motor 131 does not exceed the recommended maximum rotation speed.
  • the second mode is a mode in which the user is notified when it is detected that the number of rotations of the motor 131 exceeds the recommended maximum number of rotations.
  • the first mode and the second mode may be switched according to the operation of a switch provided on the tool body 10 or the processing device 9.
  • the notification unit 19 (and display unit) may be provided in the processing device 9.
  • control parameter related to the operation of the drive unit 13 for which the recommended value calculating unit 921 obtains the recommended value is not limited to the maximum rotation speed of the motor 131, but is, for example, the maximum value of the motor current supplied to the motor 131. It may be the maximum value of the duty of the PWM signal.
  • the control parameter whose physical quantity is detected by the detection unit 15 may be a motor current, a duty of a PWM signal, or the like.
  • the user's rank determined by the rank determination unit 922 is not limited to three levels, but may be two levels, four levels or more, or may be non-level.
  • the recommended value determination unit 923 may determine the recommended value, for example, based on a correspondence table according to the number of rank candidates of the user.
  • the recommended value determination unit 923 may determine the recommended value based on a relational expression that associates the user's rank with the recommended value.
  • the recommended value calculation unit 921 does not need to determine the rank of the user, and may directly determine the recommended value from detected data such as the operation speed described in the first modification, for example.
  • the workload determination unit 113 may notify the user when the cumulative value of the time during which the operation unit 12 is operated exceeds a reference value.
  • the work amount determining unit 113 may calculate the number of times a parameter related to vibration of the tool body 10 exceeds a threshold value within a predetermined period.
  • the predetermined period may be, for example, one day starting from midnight.
  • the parameter related to the vibration of the tool body 10 may be the magnitude of the vibration of the tool body 10 or the magnitude of the acceleration of the tool body 10. For example, if the number of times the magnitude of the acceleration of the tool body 10 exceeds the acceleration threshold within a predetermined period, the work amount determination unit 113 determines whether or not the operation unit 12 (trigger switch 121) has been operated. Regardless, the rotation of the motor 131 may be stopped.
  • the recommended value calculation unit 921 may calculate the recommended value at any time even if the motor 131 is rotating in response to an operation on the operating unit 12.
  • the control unit 11 (drive control unit 111) may control the drive unit 13 based on the recommended value obtained by the recommended value calculation unit 921.
  • recommended values of control parameters are calculated at any time based on the physical quantities detected by the detection unit 15 (15A, 15B), and the drive unit 13 is controlled based on the recommended values. So-called feedback control may be performed in real time.
  • the power tool system (100; 100A; 100B; 100C) of the first aspect includes a drive section (13), an operation section (12), a control section (11), and a detection section (15; 15A; 15B). , a tool body (10), and a recommended value calculation section (921).
  • the drive unit (13) includes a motor (131), and rotates the tip tool (20) by rotation of the motor (131).
  • the operation unit (12) is operated by a user.
  • the control section (11) controls the operation of the drive section (13) in response to a user's operation on the operation section (12).
  • the detection unit (15; 15A; 15B) detects a physical quantity related to at least one of the user's skill level and physical condition, which is obtained in response to the user's operation on the operation unit (12).
  • the tool body (10) is portable and holds a drive section (13), an operation section (12), a control section (11), and a detection section (15; 15A; 15B).
  • the recommended value calculating section (921) obtains recommended values of control parameters related to the operation of the driving section (13) based on the physical quantities detected by the detecting section (15; 15A; 15B).
  • a power tool system (100; 100A; 100B; 100C) that can prompt control according to the user's condition.
  • the detection unit (15) includes a vibration measurement unit (151) that measures parameters related to vibration of the tool body (10).
  • the recommended value calculation unit (921) calculates the rotation speed of the tip tool (20) and the vibration of the tool body (10).
  • the recommended value of the control parameter is determined based on the relationship with the relevant parameter.
  • the power tool system (100; 100A; 100B; 100C) of the fourth aspect further includes a work amount determination unit (113) in any one of the first to third aspects.
  • the work amount determination unit (113) determines the number of times a parameter related to vibration of the tool body (10) exceeds a threshold value within a predetermined period, or the cumulative value of the time during which the operating portion (12) is operated within a predetermined period. seek.
  • the operating section (12) includes a trigger switch (121) that accepts a pull operation.
  • the detection unit (15A) includes an operation speed measurement unit (153) that measures the speed at which the user pulls the trigger switch (121).
  • the detection unit (15B) detects the time interval between operations when the operation unit (12) is repeatedly operated.
  • it includes an operation interval measuring section (154) that measures the frequency of operations.
  • the control parameter includes the maximum rotation speed that is the upper limit of the rotation speed of the motor (131).
  • the recommended value calculation unit (921) calculates a recommended maximum rotational speed, which is a recommended value of the maximum rotational speed, based on the physical quantity detected by the detection unit (15).
  • the power tool system (100C) includes a notification unit (19) that notifies the user when it is detected that the rotation speed of the motor (131) exceeds the recommended maximum rotation speed determined by the recommended value calculation unit (921). , further provided.
  • control unit (11) calculates the control parameters determined by the recommended value calculation unit (921).
  • the operation of the drive unit (13) is controlled based on the recommended value.
  • the control parameter includes the maximum rotation speed that is the upper limit of the rotation speed of the motor (131).
  • the recommended value calculation unit (921) calculates a recommended maximum rotational speed, which is a recommended value of the maximum rotational speed, based on the physical quantity detected by the detection unit (15; 15A; 15B).
  • the control section (11) controls the operation of the drive section (13) so that the rotation speed of the motor (131) does not exceed the recommended maximum rotation speed determined by the recommended value calculation section (921).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Abstract

La présente divulgation aborde le problème consistant à encourager une commande qui correspond à l'état d'un utilisateur. Un système d'outil électrique (100) est équipé d'une unité d'entraînement (13), d'une unité d'actionnement (12), d'une unité de commande (11), d'une unité de détection (15), d'un corps principal d'outil et d'une unité de calcul de valeur recommandée (921). L'unité d'entraînement (13) est équipée d'un moteur (131) et fait tourner et entraîne un outil d'extrémité de pointe par rotation du moteur (131). L'unité d'actionnement (12) est actionnée par l'utilisateur. L'unité de commande (11) commande l'actionnement de l'unité d'entraînement (13) en fonction de l'actionnement effectué par l'utilisateur sur l'unité d'actionnement (12). L'unité de détection (15) détecte une quantité physique qui se rapporte à la compétence de l'utilisateur ou à sa condition physique et est obtenue en réponse à un actionnement effectué par l'utilisateur sur l'unité d'actionnement (12). Le corps principal d'outil est portatif et maintient l'unité d'entraînement (13), l'unité d'actionnement (12), l'unité de commande (11) et l'unité de détection (15). L'unité de calcul de valeur recommandée (921) obtient une valeur recommandée pour un paramètre de commande se rapportant à l'actionnement de l'unité d'entraînement (13) sur la base de la quantité physique détectée par l'unité de détection (15).
PCT/JP2023/017704 2022-06-08 2023-05-11 Système d'outil électrique WO2023238593A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020157446A (ja) * 2019-03-27 2020-10-01 オムロン株式会社 作業工具およびこれを備えた制御システム
JP2021040579A (ja) * 2019-09-12 2021-03-18 株式会社マキタ 作業機
JP2021142607A (ja) * 2020-03-12 2021-09-24 オムロン株式会社 作業工具
WO2022024715A1 (fr) * 2020-07-31 2022-02-03 工機ホールディングス株式会社 Équipement électrique et système d'équipement électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020157446A (ja) * 2019-03-27 2020-10-01 オムロン株式会社 作業工具およびこれを備えた制御システム
JP2021040579A (ja) * 2019-09-12 2021-03-18 株式会社マキタ 作業機
JP2021142607A (ja) * 2020-03-12 2021-09-24 オムロン株式会社 作業工具
WO2022024715A1 (fr) * 2020-07-31 2022-02-03 工機ホールディングス株式会社 Équipement électrique et système d'équipement électrique

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