公开(公告)号：US20150231770A1

公开(公告)日：2015-08-20

申请号：US14625311

申请日：2015-02-18

Applicant: MAKITA CORPORATION

Inventor： Takuya KUSAKAWA ,  Goshi ISHIKAWA ,  Toshihisa TAKADA

IPC: B25B21/02

CPC classification number: B25B21/02 ,  B25B23/1475

Abstract: There is provided a rotary impact tool that comprises: an impact mechanism, in which, when an external torque of a specified value or greater is applied to an anvil, a hammer impacts the anvil in a rotational direction; an impact detection unit configured to detect the impact; a fluctuation width detection unit configured to detect a fluctuation width of a physical quantity that fluctuates due to the impact; and a control unit configured to control driving of the motor according to the fluctuation width of the physical quantity when the impact is detected after a starting of the motor.

Abstract translation: 提供了一种旋转冲击工具，其包括：冲击机构，其中当将特定值或更大的外部扭矩施加到砧座时，锤在旋转方向上冲击砧座; 冲击检测单元，被配置为检测冲击; 波动宽度检测单元，被配置为检测由于冲击而波动的物理量的波动宽度; 以及控制单元，被配置为在马达起动之后检测到冲击时，根据物理量的波动宽度来控制马达的驱动。

公开(公告)号：US20170057064A1

公开(公告)日：2017-03-02

申请号：US15236718

申请日：2016-08-15

Applicant: MAKITA CORPORATION

Inventor： Goshi ISHIKAWA ,  Yoshihiro ITO ,  Toshihisa TAKADA

IPC: B25B23/147 ,  B25B21/02

CPC classification number: B25B23/1475 ,  B25B21/02

Abstract: In a rotary impact tool according to an aspect of the present disclosure, an impact mechanism rotates an output shaft by a rotational force of a motor and, when a torque equal to or greater than a given value is externally applied to the output shaft in a direction opposite a rotational direction of the output shaft, the impact mechanism intermittently applies an impact force as a momentary torque to the output shaft in the rotational direction of the output shaft. A protection unit stops the motor or reduces a rotational speed of the motor on condition that an abnormal impact detection unit detects the abnormal impact. A control unit controls activation of the protection unit differently when the rotational direction of the motor is set to a reverse rotational direction in comparison with when the rotational direction of the motor is set to a forward rotational direction.

Abstract translation: 在根据本公开的一个方面的旋转冲击工具中，冲击机构通过马达的旋转力使输出轴旋转，并且当等于或大于给定值的扭矩在外部施加到输出轴时 方向与输出轴的旋转方向相反，冲击机构在输出轴的旋转方向上间歇地将作为瞬时扭矩的冲击力施加到输出轴。 在异常冲击检测单元检测到异常影响的情况下，保护单元停止电机或降低电机的转速。 与马达的旋转方向设定为正向旋转方向相比，当马达的旋转方向设定为反转方向时，控制单元不同地控制保护单元的启动。