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    • 35. 发明申请
    • ELECTRIC TOOL AND CONTROLLING METHOD THEREOF
    • 电动工具及其控制方法
    • US20110303427A1
    • 2011-12-15
    • US13143325
    • 2010-01-04
    • Xiangyang Tang
    • Xiangyang Tang
    • B25B23/00B23Q5/04
    • B23P19/066B25B23/14B25B23/147G05D17/02H02P3/08H02P7/285H02P7/29H02P29/02
    • A power tool including a motor for rotatably driving a tool bit at an attained rotational speed, a source for supplying an electric current to the motor, a sensor for measuring the current, and a control device. The control component fulfils the task of detecting a variation of the slope of the current in the course of time, and generates a control signal. The rotational speed of the tool is reduced in response to the control signal. The power tool automatically detects whether the work piece operated by the tool bit reaches a predetermined position by electronic control means. It may make sure that the screw is driven into a piece of wood and does not go beyond the predetermined position once it detects that the work piece reaches the position and carries out a changing action.
    • 一种电动工具,包括用于以达到的转速可旋转地驱动工具头的电动机,用于向电动机供应电流的电源,用于测量电流的传感器和控制装置。 控制部件满足检测电流在时间上的斜率变化的任务,生成控制信号。 响应于控制信号,工具的转速减小。 电动工具自动检测由工具刀操作的工件是否通过电子控制装置到达预定位置。 一旦检测到工件到达位置并执行变化动作,就可以确保螺丝被驱动到一块木头中,并且不超过预定位置。