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公开(公告)号：US20170190027A1
公开(公告)日：2017-07-06
申请号：US15314098
申请日：2015-05-22
发明人： Toshiaki KOIZUMI , Takuya YOSHINARI
CPC分类号： B25B21/026 , B25B21/00 , B25C5/15 , B25F5/00 , H02J7/345
摘要： In order to provide an electric tool such that the capacitances of noise-suppressing film capacitors can be increased without increasing the diameter of a handle section, the housing of the electric tool comprises: a body section that stores a brushless motor, a striking mechanism part, and a portion of an output part; a handle section, whose one end is connected to the body section; and a storage section that is formed on the other end of the handle section. A pair of film capacitors for removing noise generated from an inverter circuit are mounted on a capacitor substrate and stored side by side inside the handle section. The film capacitors are connected in parallel with each other, thereby providing a capacitor having a larger total capacitance than before.
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公开(公告)号：US20160250743A1
公开(公告)日：2016-09-01
申请号：US15032283
申请日：2014-11-17
CPC分类号： B25F5/02 , B25B21/00 , B25D17/00 , B25D2250/095 , B25D2250/121 , B25D2250/245 , B25F5/008
摘要： An electrical power tool capable of suppressing increase in a size of a device main body in a radial direction of an electrical motor is provided. A driver which drives a distal end tool with a power of an electrical motor includes: a casing in which the electrical motor is provided; a driven gear and a spindle which are arranged eccentrically with respect to an output shaft of the electrical motor and which transmit power of the output shaft to the distal end tool; and a power supply circuit unit arranged inside the casing. And, an arrangement region of the driven gear and the spindle and an arrangement region of the power supply circuit unit are at least partially overlapped with each other in a circumferential direction centering the output shaft.
摘要翻译： 提供一种能够抑制装置主体在电动机的径向方向上的尺寸增大的电动工具。 用电动机驱动远端工具的驱动器包括：壳体，其中设置有电动马达; 从动齿轮和心轴相对于电动机的输出轴偏心地布置并将输出轴的动力传递到远端工具; 以及布置在所述壳体内的电源电路单元。 并且，从动齿轮和主轴的配置区域和电源电路单元的布置区域在以输出轴为中心的圆周方向上至少部分地彼此重叠。
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公开(公告)号：US20180111259A1
公开(公告)日：2018-04-26
申请号：US15569087
申请日：2016-03-25
发明人： Yuuki TAKEDA , Takuya YOSHINARI
CPC分类号： H02P29/00 , B24B23/02 , B24B23/022 , B25F5/00 , H02K7/145 , H02P6/16 , H02P27/06 , H02P29/50 , Y02P70/177
摘要： A power tool is provided such that noise can be reduced at a wide range of rotation speeds. A speed setting dial to be operated by a worker is disposed on a rear end part of a housing of a grinder. A control part controls driving of a motor by setting the rotation speed of the motor in response to the value of a speed setting signal which indicates a value (voltage) corresponding to an amount of rotation of the speed setting dial by the worker. Although the control part basically causes the rotation speed of the motor to change continuously in response to the rotation amount of the speed setting dial, the control part sets the rotation speed of the motor while avoiding a predetermined rotation speed region in which the noise level is increased due to mechanical and acoustic resonances.
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