EP2724821A1 - Kraftgetriebenes Handwerkzeug - Google Patents

Kraftgetriebenes Handwerkzeug Download PDF

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Publication number
EP2724821A1
EP2724821A1 EP13180623.4A EP13180623A EP2724821A1 EP 2724821 A1 EP2724821 A1 EP 2724821A1 EP 13180623 A EP13180623 A EP 13180623A EP 2724821 A1 EP2724821 A1 EP 2724821A1
Authority
EP
European Patent Office
Prior art keywords
motor
control unit
threshold
load torque
power tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13180623.4A
Other languages
English (en)
French (fr)
Other versions
EP2724821B1 (de
Inventor
Norihiro Iwamura
Hiroshi Matsumoto
Masaki Ikeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of EP2724821A1 publication Critical patent/EP2724821A1/de
Application granted granted Critical
Publication of EP2724821B1 publication Critical patent/EP2724821B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • B25B21/008—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose with automatic change-over from high speed-low torque mode to low speed-high torque mode
    • 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
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/147—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers specially adapted for electrically operated wrenches or screwdrivers
    • 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
    • B25F5/001—Gearings, speed selectors, clutches or the like specially adapted for rotary tools

Definitions

  • the present invention relates to a power tool.
  • Japanese Laid-Open Patent Publication No. 2012-30347 describes an example of a power tool including a power transmission unit, which transmits rotational power generated by a motor, and a control unit, which controls the power transmission unit and automatically changes a speed reduction ratio by shifting gears when transmitting the rotational power.
  • the motor includes an output shaft to which a tool (bit) is coupled.
  • the load torque applied to the output shaft may be detected from a load current (drive current) that is supplied to the motor.
  • the power transmission unit is enlarged as the number of gears increases.
  • a power tool especially, a portable power tool, it is desirable that the entire tool be reduced in size. This limits the number of gears that may be included in the power transmission unit of the power tool. Thus, the difference in the speed reduction ratio between gears is large.
  • the control unit controls the power transmission unit and shifts gears to one having a high speed reduction ratio.
  • improper fastening of the screw to a fastened portion may lock the tool (output shaft), or lock the motor. This increases the load torque.
  • the user receives a large impact when the power tool shifts to a gear having a high speed reduction ratio.
  • the impact received by the user is further increased immediately after the power tool shifts to a gear that increases the speed reduction ratio.
  • a threshold may be set to determine locking of the motor. It is determined that the motor is locked when the load torque exceeds the gear shifting threshold and reaches the locking threshold. When determined that the motor is locked, the speed reduction ratio of the power transmission unit is not increased. This suppresses large impacts received by the user.
  • One aspect of the present invention is a power tool including a motor, an output shaft, and a power transmission unit that transmits rotational power of the motor to the output shaft.
  • the power transmission unit decreases a rotation speed, which is related with the rotational power, in accordance with a speed reduction ratio that can be changed.
  • the power tool further includes a gear shift actuator, a torque detector, and a control unit.
  • the gear shift actuator is configured to change the speed reduction ratio of the power transmission unit.
  • the torque detector detects a load torque applied to the output shaft.
  • the control unit controls the gear shift actuator to change the speed reduction ratio of the power transmission unit in accordance with the detected load torque.
  • the control unit stops driving the motor if the detected torque reaches a threshold, which is set to detect locking of the motor, during a predetermined period from when a control is performed on the power transmission unit to increase the speed reduction ratio to when a certain amount of time elapses.
  • the control unit continues driving the motor when the detected load torque does not reach the threshold during the predetermined period.
  • the threshold set to detect locking is set to increase as time elapses after the control unit performs a control to increase the speed reduction ratio.
  • the control unit stops driving the motor when the detected load torque reaches the threshold that is increased as time elapses.
  • the control unit continues driving the motor when the load torque does not reach the threshold that is increased as time elapses.
  • a power tool 10 of the present embodiment is used as, for example, a drill driver.
  • the power tool 10 includes a main body 11 and a battery pack 12, which is coupled to the main body 11 in a removable manner.
  • the main body 11 of the power tool 10 includes a motor 21, a power transmission unit 22, and a control unit 23.
  • the motor 21 is driven when supplied with power from the battery pack 12.
  • the power transmission unit 22 transmits rotational power generated by the motor 21 to an output shaft 25.
  • the control unit 23 controls the power tool 10 including the motor 21.
  • the battery pack 12 includes a rechargeable battery formed by battery cells (e.g., lithium-ion cells).
  • the motor 21 includes a rotation shaft 24 coupled to the power transmission unit 22, which includes a speed reduction mechanism and a clutch mechanism.
  • the power transmission unit 22 includes, for example, two gears, namely a high (H) gear and a low (L) gear. Thus, the speed reduction ratio of the power transmission unit 22 may be shifted in two steps.
  • the output shaft 25 includes a distal end to which a tool 26 (bit) is coupled. Accordingly, when the power transmission unit 22 transmits rotational power from the motor 21 to the output shaft 25, the tool 26 is rotated together with the output shaft 25.
  • the L gear of the power transmission unit 22 is set to have a higher speed reduction ratio (lower rotation speed and higher torque) than the H gear.
  • the power transmission unit 22 includes a gear shift actuator 27 to change the speed reduction ratio.
  • the gear shift actuator 27 is, for example, a motor actuator and powered when supplied with drive power from a gear shift driver 28 under the control of the control unit 23.
  • the gear shift actuator 27 functions to shift gears of the power transmission unit 22 under the control of the control unit 23 via the gear shift driver 28.
  • the control unit 23 is powered when supplied with voltage-regulated power from the battery pack 12.
  • the gear shift driver 28 is formed by, for example, an H-bridge circuit including a switching element (e.g., FET).
  • the control unit 23 sends a control signal to the gear shift driver 28 to control the rotational direction of the motor 21 with the gear shift actuator 27 and to control the drive power supplied through pulse width modulation (PWM) control.
  • PWM pulse width modulation
  • the motor 21 is driven to generate rotation when supplied with drive power from a switching drive circuit 29 including, for example, an H-bridge circuit formed by a switching element (e.g., FET).
  • the switching drive circuit 29 receives power from the battery pack 12.
  • the control unit 23 performs PWM control on the switching drive circuit 29 to control the drive power supplied to the motor 21 with the switching drive circuit 29. In other words, the control unit 23 controls the power supplied to the motor 21 with the switching drive circuit 29, and controls the speed of the rotation generated by the motor 21.
  • the main body 11 of the power tool 10 includes a trigger switch 31 that may be operated by a user.
  • the trigger switch 31 includes a switch that starts and stops the motor 21 and sends an output signal to the control unit 23 in accordance with the operation amount of the trigger switch 31 (pulled trigger amount).
  • the control unit 23 controls the power supplied to the motor 21 from the switching drive circuit 29 based on the output signal from the trigger switch 31 to start and stop the motor and regulate the rotation speed when operated.
  • a current detector 41 is arranged between the switching drive circuit 29 and the motor 21 to detect the load current (drive current) supplied to the motor 21.
  • the current detector 41 includes a detection resistor 42, which is connected between the switching drive circuit 29 and the motor 21, and an amplification circuit 43 (operational amplifier), which amplifies a terminal voltage of the detection resistor 42 as a detection signal and provides the control unit 23 with the detection signal.
  • the control unit 23 detects a load current based on the detection signal from the current detector 41 for each predetermined sampling period. Further, the control unit 23 detects the load torque applied to the output shaft 25 (tool 26) based on the detected load current and the gear of the power transmission unit 22 when the load current is detected. The control unit 23 detects locking of the motor 21 based on the detected load torque and controls the motor 21 accordingly.
  • the control unit 23 is configured to control the power transmission unit 22 and perform automatic gear shifting with the gear shift actuator 27 based on the detected load torque.
  • the speed reduction mechanism of the power transmission unit 22 is, for example, a planetary gear speed reduction mechanism that includes a sun gear, which is rotated about the axis of the rotation shaft 24 of the motor 21, planet gears, which is engaged with and arranged around the sun gear, and a ring gear, which is engaged with the planet gear.
  • the gear shift actuator 27 moves the ring gear to change the planet gear that is engaged with the ring gear and thereby control gear shifting.
  • the power tool 10 may include a drive state detector that detects whether the ring gear has been moved to the correct position by the gear shift actuator 27. In such a case, the control unit 23 controls the gear shift actuator 27 based on detection signals from the drive state detector.
  • the trigger switch 31 When the user pulls the trigger switch 31 of the power tool 10, the trigger switch 31 provides the control unit 23 with an output signal, which is in correspondence with the pulled amount.
  • the control unit 23 controls the switching drive circuit 29 based on the output signal from the trigger switch 31 to stop and start the motor 21 and control the rotation speed of the motor 21.
  • the power transmission unit 22 transmits the rotational power of the motor 21 to the output shaft 25 to rotate the tool 26. Further, the control unit 23 shifts the power transmission unit 22 to the H gear or the L gear in accordance with the load torque.
  • the power transmission unit 22 selects the H gear when the load torque is small so that the tool 26 is driven at a high rotation speed with a low torque. When activated, the power transmission unit 22 selects the H gear.
  • the power transmission unit 22 selects the L gear so that the tool 26 is driven at a low rotation speed with a high torque. Further, based on detection signals from the current detector 41, the control unit 23 detects the locking of the motor 21 and controls the stopping of the motor 21. When the L gear is selected, to determine whether or not the motor 21 is locked, in addition to the load torque (current) detected by the current detector 41, temporal changes in the load torque are also detected.
  • the control unit 23 Based on the load torque detected by the current detector 41, the control unit 23 detects locking of the motor 21.
  • Fig. 2 is a graph illustrating the load torque T when the power tool 10 is driven by the H gear, when gears are shifted, and when the power tool 10 is driven by the L gear.
  • load current load current
  • inrush current flows to the motor 21 when the motor 21 is activated.
  • the load produced by the task that is performed varies the load current.
  • the load current increases as the screw becomes seated (head of screw comes into contact with fastened subject). The increase in the load current becomes significant when the screw (fastening length) is longer and when the fastened subject is harder.
  • the control unit 23 determines that the load torque T satisfies a speed shifting condition and controls the power transmission unit 22 to shift from the H gear to the L gear.
  • the control unit 23 interrupts the supply of power to the motor 21.
  • an activation current is generated when the control unit 23 restarts the supply of power to the motor 21 after shifting to the L gear.
  • a timer C starts measuring time.
  • a threshold S3 (lock condition) for the load torque T after gear shifting (after shifting to the L gear) is set to allow for the control unit 23 to detect locking of the motor 21.
  • the control unit 23 determines that locking has occurred and stops driving the motor 21.
  • the control unit 23 continues driving the motor 21.
  • the timer C measures the time after the activation current is generated.
  • the activation current is not compared with the threshold S3, and locking of the motor 21 is not determined based on the activation current.
  • a single locking threshold S3 is set for the predetermined period from when the timer C starts measuring time (time t3) to time t4.
  • predetermined thresholds may be set in accordance with the elapsed time from when the timer C starts measuring time.
  • a predetermined period from when the timer C starts measurement (time t5) to time t9 includes four sessions.
  • Four locking thresholds S4a, S4b, S4c, and S4d are respectively set for the four sessions.
  • the threshold S4a used from when the timer C starts measurement (time t5) to when time t6 is reached is set to be lower than the other thresholds S4b, S4c, and S4d.
  • the threshold S4b used from time t6 to time t7 is set to be lower than thresholds S4c and S4d.
  • the threshold S4c used between time t7 and time t8 is lower than the threshold S4d used between time t8 and time t9.
  • the control unit 23 determines that the locking condition has been satisfied and stops driving the motor 21. When the threshold S4a is not reached between time t5 to time t6, the control unit 23 continues to drive the motor 21. When determining that the threshold S4b has been reached between time t6 to time t7, the control unit 23 determines that the locking condition has been satisfied and stops driving the motor 21. When the threshold S4b is not reached between time t6 to time t7, the control unit 23 continues to drive the motor 21. When determining that the threshold S4c has been reached between time t7 to time t8, the control unit 23 determines that the locking condition has been satisfied and stops driving the motor 21.
  • the control unit 23 When the threshold S4c is not reached between time t7 to time t8, the control unit 23 continues to drive the motor 21. When determining that the threshold S4d has been reached between time t8 to time t9, the control unit 23 determines that the locking condition has been satisfied and stops driving the motor 21. When the threshold S4d is not reached between time t8 to time t9, the control unit 23 continues to drive the motor 21.
  • Fig. 3 shows an example in which the motor 21 is continuously driven until the fastening of a screw is completed.
  • the thresholds S4a, S4b, S4c, and S4d used to detect locking of the motor 21 are set to increase as time elapses after the control unit 23 executes control to significantly increase the speed reduction ratio.
  • the control unit 23 stops driving the motor 21.
  • the control unit 23 continues driving the motor 21. If the user recognizes that the speed reduction ratio has been changed as time elapses, protection becomes unnecessary. Thus, by gradually moderating (increasing) the locking threshold, the operability may be improved.
  • the timer C when re-driving the motor 21 after shifting to the L gear, the timer C does not start measuring time when inrush current is generated. However, as long as a threshold is set taking into consideration the inrush current as shown in Fig. 4 (i.e., as long as the threshold is set to be greater than the inrush current), time measurement may be started as soon as gears are shifted.
  • the control unit 23 starts measuring time with the timer C when the motor 21 restarts the driving of the motor 21 (time t2). Then, after the driving of the motor 21 is restarted, the control unit 23 compares the load current (load torque) with threshold S5a until time t10 during which inrush current is generated.
  • the control unit 23 determines that the locking condition is satisfied when the load current (load torque) reaches threshold S5a and stops driving the motor 21. When the load current (load torque) does not reach threshold S5a, the control unit 23 continues driving the motor 21. Then, the control unit 23 compares the load current (load torque) with threshold S5b from time t10 0 to time t5, which is when the inrush current decreases and the load current stabilizes. The control unit 23 determines that the locking condition is satisfied when the load current (load torque) reaches threshold S5b and stops driving the motor 21. When the load current (load torque) does not reach threshold S5b, the control unit 23 continues driving the motor 21.
  • locking detection may be performed when the H gear is selected.
  • the load torque T suddenly increases.
  • threshold S1 gear shifting condition
  • threshold S2 locking condition
  • Threshold S2 is set as a larger torque value than threshold S1.
  • the control unit 23 determines that the motor 21 is locked and stops the motor 21 (time tx2). That is, the control unit 23 determines that locking of the motor 21 has occurred when the load torque T exceeds gear shifting threshold S1 within a short period and suddenly increases to threshold S2. When such lock determination is given, the control unit 23 does not shift to the L gear even when the load torque T exceeds the threshold S1.
  • a rotation detector 51 that detects the rotation speed of the motor 21 may be used to detect locking of the motor 21.
  • the rotation detector 51 is arranged on, for example, the rotation shaft 24 of the motor 21.
  • the rotation detector 51 is fixed to the rotation shaft 24 so as to rotate integrally with the rotation shaft 24.
  • the rotation detector 51 includes a sensor magnet 52, which has a plurality of magnetic poles, and a Hall element 53, which is arranged opposing the sensor magnet 52.
  • the Hall element 53 provides the control unit 23 with a detection signal indicating changes in the magnetic flux caused by rotation of the sensor magnet 52.
  • the control unit 23 detects the rotation speed of the motor 21 based on the detection signal from the rotation detector 51.
  • the control unit 23 also detects locking of the motor 21 from changes in the rotation speed. More specifically, the control unit 23 detects locking based on the rotation speed of the motor 21 that is detected by the rotation detector 51. When the motor 21 locks, the rotation speed of the motor 21 suddenly decreases. Accordingly, the control unit 23 is configured to detect locking based on both of the load torque T and the rotation speed. For example, even when the load torque T exceeds the threshold S2, as long as the rotation speed does not decrease or the decreasing rate of the rotation speed is low, the control unit 23 determines that the motor 21 is not locked. This increases the locking detection accuracy.
  • the load torque T is indirectly detected from the load current that is supplied to the motor 21.
  • the torque applied to the output shaft 25 may be directly measured.
  • the power tool 10 may include an acceleration sensor that detects movement of the power tool 10 (main body 11) in the rotation direction of the output shaft 25.
  • the control unit 23 is incorporated in a battery pack support 61 that supports the battery pack 12.
  • An acceleration sensor 62 is arranged on a substrate of the control unit 23. Under a situation in which the tool 26 (output shaft 25) becomes locked thereby causing the power tool 10 to rotate, the acceleration sensor 62 detects movement of the power tool 10 as acceleration and provides the control unit 23 with a detection signal indicating the acceleration.
  • the arrow 63 shown in Fig. 5 indicates the rotation direction of the power tool 10 when locked, and the arrow 64 indicates the direction of the detected acceleration component. This configuration allows for the control unit 23 to determine whether or not locking has caused movement of the power tool, that is, whether or not the motor 21 is locked.
  • the acceleration of the power tool 10 increases as the distance from the rotation axis of the tool 26 (output shaft 25) increases. Accordingly, the locking detection accuracy may be increased by arranging the acceleration sensor 62 at a location separated as much as possible from the rotation axis.
  • the acceleration sensor 62 may be arranged between the main body 11 of the power tool 10 and the battery pack 12. Alternatively, the acceleration sensor 62 may be incorporated in the battery pack 12. In each of these cases, the acceleration sensor 62 is configured to send a detection signal to the control unit 23.
  • the direction, component, and the like of the acceleration detected by the acceleration sensor 62 may be changed in accordance with the configuration of the power tool 10.
  • Fig. 6 shows a power tool 10 for a saw or the like.
  • the rotation direction of the tool 26 (circular saw) and the holding style of the power tool 10 differs from the drill driver shown in Fig. 5 .
  • the acceleration component detected by the acceleration sensor 62 is set based on the direction the power tool 10 moves when the motor 21 locks.
  • the power transmission unit 22 shifts to one of two speed reduction ratios. Instead, the power transmission unit 22 may shift to one of three or more speed reduction ratios.
  • the gear shift actuator 27 is a motor actuator.
  • the drive source does not have to be a motor and may be a solenoid or the like.
  • the power tool 10 is a drill driver.
  • the power tool 10 may be of a different type such as an impact driver, an impact wrench, a hammer drill, a vibration drill, a jigsaw, a sealing gun, or the like.
  • control unit 23 may start measuring timing with the timer C as the load current detected when restarting driving of the motor 21 becomes lower than the threshold set to detect locking of the motor 21.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
EP13180623.4A 2012-09-07 2013-08-16 Kraftgetriebenes Handwerkzeug Active EP2724821B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012197102A JP5914841B2 (ja) 2012-09-07 2012-09-07 電動工具

Publications (2)

Publication Number Publication Date
EP2724821A1 true EP2724821A1 (de) 2014-04-30
EP2724821B1 EP2724821B1 (de) 2017-10-04

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Family Applications (1)

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EP13180623.4A Active EP2724821B1 (de) 2012-09-07 2013-08-16 Kraftgetriebenes Handwerkzeug

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EP (1) EP2724821B1 (de)
JP (1) JP5914841B2 (de)
CN (1) CN103659700B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3078458A1 (de) * 2015-04-07 2016-10-12 Black & Decker Inc. Elektrowerkzeug mit automatischem feathering-modus
US10486281B2 (en) 2015-12-14 2019-11-26 Milwaukee Electric Tool Corporation Overload detection in a power tool
CN110880903A (zh) * 2018-09-06 2020-03-13 米沃奇电动工具公司 使用电动工具的速度控制进行热管理的系统和方法
EP3960371A1 (de) * 2020-09-01 2022-03-02 Hilti Aktiengesellschaft Maschine und verfahren zum betreiben einer maschine
IT202100010208A1 (it) * 2021-04-22 2022-10-22 Cembre Spa Avvitatore a coppia controllata
IT202100010190A1 (it) * 2021-04-22 2022-10-22 Cembre Spa Avvitatore a coppia controllata
IT202100010217A1 (it) * 2021-04-22 2022-10-22 Cembre Spa Avvitatore a coppia controllata
US11904440B2 (en) 2018-08-30 2024-02-20 Panasonic Intellectual Property Management Co., Ltd. Electric power tool

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CN104669186B (zh) * 2015-02-11 2017-03-01 小米科技有限责任公司 螺丝刀操控方法、装置及螺丝刀
JP6481856B2 (ja) * 2015-03-12 2019-03-13 パナソニックＩｐマネジメント株式会社 電動工具
SE538799C2 (sv) * 2015-06-30 2016-11-29 Atlas Copco Ind Technique Ab Method and a power tool for error proof screw joint tightening.
WO2020175007A1 (ja) * 2019-02-26 2020-09-03 工機ホールディングス株式会社 電動作業機
CN111823193B (zh) * 2019-04-19 2022-11-15 苏州宝时得电动工具有限公司 电动工具及其控制方法
EP3960374A4 (de) * 2019-04-24 2022-06-01 Panasonic Intellectual Property Management Co., Ltd. Elektrowerkzeug

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JP2011047465A (ja) * 2009-08-26 2011-03-10 Panasonic Electric Works Power Tools Co Ltd 回転電動工具の自動変速装置
JP5491346B2 (ja) * 2010-10-13 2014-05-14 株式会社マキタ 電動工具およびプログラム
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JP5895211B2 (ja) * 2012-03-13 2016-03-30 パナソニックＩｐマネジメント株式会社 電動工具及び電動工具の制御装置

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Publication number Priority date Publication date Assignee Title
JP2012030347A (ja) 2010-07-06 2012-02-16 Panasonic Electric Works Power Tools Co Ltd 電動工具
WO2012114815A1 (ja) * 2011-02-22 2012-08-30 パナソニックＥｓパワーツール株式会社 電動工具

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3078458A1 (de) * 2015-04-07 2016-10-12 Black & Decker Inc. Elektrowerkzeug mit automatischem feathering-modus
US10637379B2 (en) 2015-04-07 2020-04-28 Black & Decker Inc. Power tool with automatic feathering mode
US10486281B2 (en) 2015-12-14 2019-11-26 Milwaukee Electric Tool Corporation Overload detection in a power tool
US11904440B2 (en) 2018-08-30 2024-02-20 Panasonic Intellectual Property Management Co., Ltd. Electric power tool
CN110880903A (zh) * 2018-09-06 2020-03-13 米沃奇电动工具公司 使用电动工具的速度控制进行热管理的系统和方法
EP3960371A1 (de) * 2020-09-01 2022-03-02 Hilti Aktiengesellschaft Maschine und verfahren zum betreiben einer maschine
WO2022049030A1 (en) * 2020-09-01 2022-03-10 Hilti Aktiengesellschaft Machine and method for running a machine
IT202100010208A1 (it) * 2021-04-22 2022-10-22 Cembre Spa Avvitatore a coppia controllata
IT202100010190A1 (it) * 2021-04-22 2022-10-22 Cembre Spa Avvitatore a coppia controllata
IT202100010217A1 (it) * 2021-04-22 2022-10-22 Cembre Spa Avvitatore a coppia controllata

Also Published As

Publication number Publication date
JP5914841B2 (ja) 2016-05-11
EP2724821B1 (de) 2017-10-04
JP2014050923A (ja) 2014-03-20
CN103659700B (zh) 2016-04-27
CN103659700A (zh) 2014-03-26

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