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1. 发明授权

US10183384B2 Power tool 有权
公开(公告)号：US10183384B2
公开(公告)日：2019-01-22
申请号：US14761660
申请日：2014-03-18
申请人： HITACHI KOKI CO., LTD.
发明人： Nobuhiro Takano , Kazutaka Iwata
IPC分类号： B25B21/02 , B25F5/00
摘要： The purpose of the present invention is to use a motor with as high an output as possible to complete tightening operations at a high speed while limiting continuous drive output. In a power tool having a plurality of impact operation modes, the motor thereof is controlled at a 100% duty cycle so as to rotate at a high speed in the period between pulling of a trigger and starting of an impact operation (71a-71b), and the duty cycle is changed to a low duty cycle matching the appropriate operation mode after an impact by an impact mechanism is started and a predetermined stroke is performed so that the motor is driven at the low duty cycle until the trigger is returned (arrow 71c-71d). The switching of the duty cycle is performed when the current flowing to the motor exceeds a threshold (I1).

2. 发明申请

US20160079887A1 ELECTRIC TOOL 审中-公开
标题翻译：电动工具
公开(公告)号：US20160079887A1
公开(公告)日：2016-03-17
申请号：US14786212
申请日：2014-04-25
申请人： HITACHI KOKI CO., LTD.
发明人： Nobuhiro Takano , Kazutaka Iwata
IPC分类号： H02P1/02 , H02P1/22 , B25F5/00
CPC分类号： H02P1/028 , B25B21/00 , B25B21/02 , B25F5/008 , H02P1/22
摘要： An electric tool includes: a motor configured to be driven by PWM controlling a semiconductor switching element; a trigger configured to adjust startup and rotation of the motor; a changeover switch configured to switch a rotation direction of the motor between a forward rotation and a reverse rotation; a power transmission mechanism configured to rotate a tip tool by the motor, and a controller configured to control rotation of the motor. When the reverse rotation is set by the changeover switch, the controller PWM controls the semiconductor switching element at a high duty ratio after the trigger is pulled to drive the motor, and thereafter drives the motor at a state where the high duty ratio is changed to a low duty ratio.
摘要翻译：一种电动工具，包括：电动机，被配置为由PWM控制半导体开关元件驱动; 触发器，其被配置为调节所述电动机的启动和旋转; 切换开关，被配置为在正向旋转和反向旋转之间切换电动机的旋转方向; 动力传递机构，其构造成通过所述马达旋转末梢工具;以及控制器，被配置为控制所述马达的旋转。当通过转换开关设定反向旋转时，控制器PWM在拉动触发器以驱动电动机之后以高占空比控制半导体开关元件，然后在高占空比变为高的状态下驱动电动机低占空比。

3. 发明申请

US20140374130A1 Impact Tool 审中-公开
标题翻译：影响工具
公开(公告)号：US20140374130A1
公开(公告)日：2014-12-25
申请号：US14372320
申请日：2013-03-04
申请人： Hitachi Koki Co., Ltd.
发明人： Mizuho Nakamura , Nobuhiro Takano , Tomomasa Nishikawa , Hironori Mashiko
IPC分类号： B25D16/00 , B25D11/00
CPC分类号： B25D16/006 , B25B21/02 , B25B21/026 , B25B23/1475 , B25D11/00
摘要： An impact tool includes a motor, a hammer, an anvil, and a control unit. The hammer is configured to be driven by the motor and be movable in an axial direction of the motor. The anvil is configured to be struck by the hammer. The control unit is configured to control a rotation of the motor. The impact tool further includes a restricting unit configured to restrict the movement of the hammer in the axial direction. The control unit is configured to select a driving mode of the motor between a first mode and a second mode. The control unit selects the first mode when a load of the motor is less than or equal to a prescribed value regardless of a restriction of the restricting unit, whereas the control unit selects the second mode when the load exceeds the prescribe value and the restricting unit restricts the movement of the hammer.
摘要翻译：冲击工具包括马达，锤子，砧座和控制单元。锤被构造成由电动机驱动并且可以在电动机的轴向方向上移动。砧被构造成被锤子撞击。控制单元被配置为控制电动机的旋转。冲击工具还包括限制单元，其构造成限制锤在轴向上的运动。控制单元被配置为在第一模式和第二模式之间选择电动机的驱动模式。当电动机的负载小于或等于规定值时，控制单元选择第一模式，而与限制单元的限制无关，而当负载超过规定值时，控制单元选择第二模式，并且限制单元限制锤子的运动。

4. 发明授权

US09893343B2 Battery pack and electric device 有权
公开(公告)号：US09893343B2
公开(公告)日：2018-02-13
申请号：US14773692
申请日：2014-02-28
申请人： HITACHI KOKI CO., LTD.
发明人： Nobuhiro Takano
IPC分类号： H01M2/34 , H01M10/42 , H01M10/48 , H02J7/00
CPC分类号： H01M2/34 , H01M2/348 , H01M10/42 , H01M10/425 , H01M10/48 , H01M10/482 , H01M10/486 , H01M2010/4271 , H01M2200/00 , H01M2220/30 , H02J7/0031 , H02J7/0045 , H02J7/0078 , H02J7/0091 , H02J2007/0067
摘要： The present invention reduces or shuts off output electric power of a battery pack, which is connected to an electric device, depending on an abnormality. According to the present invention, a battery pack is detachably connected to an electric-device main body having a switch, and includes a first electric-power control circuit that outputs a first signal to the electric-device main body when the switch is operated, the first signal for allowing supply of electric power to the electric-device main body, a second switching element provided on an electric-power supply path that supplies electric power to the electric-device main body, and a second electric-power control circuit that outputs a second signal to the second switching element if an abnormality occurs in the battery pack, the second signal for reducing or shutting off the electric power supplied to the electric-device main body.

5. 发明授权

US10505473B2 Electric tool 有权
公开(公告)号：US10505473B2
公开(公告)日：2019-12-10
申请号：US15123074
申请日：2015-03-25
申请人： HITACHI KOKI CO., LTD.
发明人： Nobuhiro Takano , Kazutaka Iwata , Toshiaki Koizumi , Naoki Tadokoro , Hiroshi Haga , Shinichirou Satou
IPC分类号： H02P6/16 , B25F5/00 , H02P27/08
CPC分类号： H02P6/16 , B25F5/00 , H02P27/08
摘要： An electric tool including a motor configured to be driven by a PWM control of a semiconductor switching element by using a power supply, a power transmission mechanism configured to transmit a rotation of the motor to an end tool, and a controller configured to control a rotation of the motor by a duty ratio of a PWM signal, wherein the controller is configured to set the duty ratio to a reference duty ratio less than 100% when a voltage of the power supply applied to the electric tool is within a predetermined range including a rated voltage of the electric tool, and wherein the controller is configured to drive the motor by setting the duty ratio to be higher than the reference duty ratio when the voltage of the power supply applied to the electric tool is lower than the predetermined range.

6. 发明授权

US10171011B2 Electric tool 有权
公开(公告)号：US10171011B2
公开(公告)日：2019-01-01
申请号：US14786212
申请日：2014-04-25
申请人： HITACHI KOKI CO., LTD.
发明人： Nobuhiro Takano , Kazutaka Iwata
IPC分类号： H02P1/04 , H02P1/02 , B25B21/00 , B25B21/02 , H02P1/22
摘要： An electric tool includes: a motor configured to be driven by PWM controlling a semiconductor switching element; a trigger configured to adjust startup and rotation of the motor; a changeover switch configured to switch a rotation direction of the motor between a forward rotation and a reverse rotation; a power transmission mechanism configured to rotate a tip tool by the motor, and a controller configured to control rotation of the motor. When the reverse rotation is set by the changeover switch, the controller PWM controls the semiconductor switching element at a high duty ratio after the trigger is pulled to drive the motor, and thereafter drives the motor at a state where the high duty ratio is changed to a low duty ratio.

7. 发明申请

US20150022125A1 ELECTRIC TOOL 审中-公开
标题翻译：电动工具
公开(公告)号：US20150022125A1
公开(公告)日：2015-01-22
申请号：US14380251
申请日：2013-03-13
申请人： HITACHI KOKI CO., LTD.
发明人： Nobuhiro Takano , Tetsuhiro Harada , Yoshio Iimura , Tomomasa Nishikawa , Hiroki Uchida , Yoshihiro Nakano
IPC分类号： H02P6/08
CPC分类号： H02P29/60 , B25B21/02 , B25F5/00 , B25F5/008 , H02P27/08 , H02P29/0241 , H02P29/68
摘要： An electric tool for driving a tip tool, the electric tool includes: a removable battery; the brushless motor configured to generate a driving force for driving the tip tool; an inverter circuit configured to supply drive power from the removable battery to the brushless motor using a plurality of semiconductor switching elements; a controller configured to control the inverter circuit to control rotation of the brushless motor; a temperature detector configured to detect a temperature of the brushless motor or the semiconductor switching elements; and a voltage detector configured to detect a voltage of the battery. The brushless motor is driven such that a duty ratio of PWM drive signal for driving the semiconductor switching elements is determined based on relationship between the temperature detected by the temperature detector and the voltage detected by the voltage detector.
摘要翻译：一种用于驱动尖端工具的电动工具，电动工具包括：可拆卸电池; 所述无刷电动机构造成产生用于驱动所述尖端工具的驱动力; 逆变器电路，被配置为使用多个半导体开关元件将可移除电池的驱动电力提供给无刷电动机; 控制器，被配置为控制所述逆变器电路以控制所述无刷电动机的旋转; 温度检测器，被配置为检测所述无刷电动机或所述半导体开关元件的温度; 以及电压检测器，被配置为检测电池的电压。基于由温度检测器检测的温度与由电压检测器检测到的电压之间的关系来确定用于驱动半导体开关元件的PWM驱动信号的占空比来确定无刷电动机。

8. 发明授权

US10547182B2 Electric operating machine 有权
公开(公告)号：US10547182B2
公开(公告)日：2020-01-28
申请号：US15429787
申请日：2017-02-10
申请人： HITACHI KOKI CO., LTD.
发明人： Nobuhiro Takano , Kazuhiko Funabashi , Hideyuki Tanimoto , Chikai Yoshimizu , Hiromi Ozawa , Yoshihiro Hoshi
IPC分类号： H02J7/00 , A01D69/02 , H01M10/0525 , H01M10/42 , H01M10/48 , H02K7/14 , H02P29/024
摘要： When a main switch (12) is turned ON, an electric operating machine (1) is put in the standby mode. With a trigger (13) being pulled in the standby mode, a power supply circuit (16) applies a voltage to a drive part (30). The power supply circuit (16) adjusts the voltage applied to the drive part (30) for a voltage corresponding to the pulling rate of the trigger (13). When the current running toward the drive part (30) exceeds the rated value of the drive part (30), the power supply circuit (16) automatically stops power supply to the drive part (30). On the other hand, when the output voltage of a battery (50) drops and the battery (50) is put in an overdischarge state, power supply to the drive part (30) is automatically stopped. When it is detected that the battery (50) undergoes an abnormal event, power supply to the drive part (30) is automatically stopped.

9. 发明授权

US10205198B2 Power tool and battery pack 有权
公开(公告)号：US10205198B2
公开(公告)日：2019-02-12
申请号：US15315174
申请日：2015-05-22
申请人： Hitachi Koki Co., Ltd.
发明人： Yoshikazu Kawano , Nobuhiro Takano , Toshiaki Koizumi , Kazuhiko Funabashi , Kenichirou Yoshida , Takao Aradachi
IPC分类号： H02J7/00 , H01M10/42 , B25F5/00 , H01M10/44 , H01M10/48 , B60L3/00 , H01M2/10 , H02H3/05 , H02H7/08 , H02J1/00
摘要： A power tool includes a motor and control means for controlling the motor. The motor is capable of being driven by power supplied from a battery pack including a battery cell. The control means is configured to continue to rotate the motor even when a motor-halt signal is inputted from the battery pack. With this structure, the power tool can be used continuously without need to halt rotation of the motor, even when receiving a halt signal, such as an overdischarge detection signal or an overcurrent detection signal.

10. 发明申请

US20170012572A1 WORK TOOL 审中-公开
标题翻译：工作工具
公开(公告)号：US20170012572A1
公开(公告)日：2017-01-12
申请号：US15122010
申请日：2015-01-23
申请人： Hitachi Koki Co., Ltd.
发明人： Nobuhiro Takano , Yoshikazu Kawano , Toshiaki Koizumi , Hideyuki Tanimoto , Kazutaka Iwata , Shigeharu Ushiwata
IPC分类号： H02P29/68 , H02P27/08 , B25F5/00 , B23D45/16 , B23D47/12
CPC分类号： H02P29/68 , B23D45/12 , B23D45/16 , B23D47/12 , B24B47/26 , B25F5/00 , H02P27/08
摘要： To provide a work tool capable of suppress temperature rise in a motor or a switching element. The work tool includes: a motor; a switching element switchable between an ON-state and an OFF-state, the switching element allowing a current to flow through the motor during the ON-state, the switching element prohibiting a current from flowing through the motor during the OFF-state; target rotation number setting means for setting a target rotation number of the motor; rotation number controlling means for controlling the motor such that the rotation number thereof is brought in coincidence with the target rotation number by changing an ON-duration, during which the switching element is in the ON-state, in one switching period of the switching element; and temperature detecting means for detecting at least one of a temperature of the motor and a temperature of the switching element. The rotation number controlling means is capable of setting an upper limit with respect to the ON-duration on the basis of the temperature detected by the temperature detecting means and changes the ON-duration within a range not more than the upper limit.
摘要翻译：提供能够抑制电动机或开关元件的温度上升的作业工具。工作工具包括：电机; 开关元件，其可以在导通状态和断开状态之间切换，所述开关元件允许电流在所述接通状态期间流过所述电动机，所述开关元件禁止电流在所述关闭状态期间流过所述电动机; 目标转速设定装置，用于设定电动机的目标转速; 旋转数控制装置，用于通过在开关元件的一个开关周期期间改变开关元件处于导通状态的导通时间，使其转数与目标转数一致， ; 以及用于检测电动机的温度和开关元件的温度中的至少一个的温度检测装置。旋转数控制装置能够基于由温度检测装置检测到的温度来设定相对于ON持续时间的上限，并且将ON持续时间改变在不大于上限的范围内。

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