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    Electric tool
    41.
    发明授权
    Electric tool 有权

    公开(公告)号：US11731256B2

    公开(公告)日：2023-08-22

    申请号：US16637279

    申请日：2018-08-31

    Applicant: Koki Holdings Co., Ltd.

    Inventor： Hideki Yamada ,  Hideyuki Hashimoto ,  Yuta Noguchi

    IPC: B25D16/00 ,  B25D17/00

    CPC classification number: B25D16/006 ,  B25D17/00 ,  B25D2216/0084 ,  B25D2250/095 ,  B25D2250/201 ,  B25D2250/221 ,  B25D2250/265

    Abstract: Provided is an electric tool with which work efficiency can be improved. A controller of an electric tool can execute: a first control, whereby during a non-operating state after a motor has started up and before a tip tool is set to be in an operating state, the motor is driven at a slow idling rotation speed, and when the tip tool is set to be in the operating state, the motor is driven at a normal rotation speed which is higher than the slow idling rotation speed; and a second control, whereby in a case where a trigger switch has been turned off in a state where the motor is being driven at the normal rotation speed and the trigger switch is thereafter turned on again under a prescribed condition, the motor is driven at the normal rotation speed regardless of the state of the tip tool.

    CONTROL METHOD FOR A POWER TOOL
    42.
    发明申请
    CONTROL METHOD FOR A POWER TOOL 审中-公开

    公开(公告)号：US20180304453A1

    公开(公告)日：2018-10-25

    申请号：US15769780

    申请日：2016-11-15

    Applicant: Hilti Aktiengesellschaft

    Inventor： Roland SCHAER ,  Thomas KINKELDEI ,  Peter HRICKO ,  Manuel GUT ,  Michael WIERER

    IPC: B25F5/00 ,  B25D11/00

    CPC classification number: B25F5/001 ,  B23B45/02 ,  B25D11/00 ,  B25D2211/068 ,  B25D2250/201 ,  B25D2250/221 ,  B25F5/00

    Abstract: A control method for a power tool for rotary tools provides the following: A tool holder is rotated continuously in a forward direction about a working axis by a rotary drive when an operating switch is actuated. The continuous rotation in the forward direction is interrupted by a protective process when a protective device senses blocking of the tool holder. During the protective process, one or more cycles are executed, in which the rotary drive is actuated successively in accordance with an unimpeded rotary movement in a reverse direction and in accordance with an unimpeded rotary movement in the forward direction. The rotary drive is supplied with a first amount of energy for the rotary movement in the reverse direction and with a second amount of energy for the rotary movement in the forward direction. The first amount of energy is smaller than the second amount of energy.

    CONTROL METHOD FOR A HAND-HELD POWER TOOL
    44.
    发明申请
    CONTROL METHOD FOR A HAND-HELD POWER TOOL 审中-公开

    公开(公告)号：US20170361447A1

    公开(公告)日：2017-12-21

    申请号：US15532597

    申请日：2015-12-01

    Applicant: Hilti Aktiengesellschaft

    Inventor： Rainer ONTL ,  Damir CEHAJIC ,  Christoph DIEING

    IPC: B25D17/24 ,  F16F7/104

    CPC classification number: B25D17/24 ,  B25D2211/068 ,  B25D2216/0038 ,  B25D2217/0092 ,  B25D2250/005 ,  B25D2250/175 ,  B25D2250/201 ,  B25D2250/221 ,  F16F7/104

    Abstract: The hand-held power tool has a tool holder (2) for holding a tool (4) along a working axis (12). A hammer mechanism (6) has a striker (15) that is moved periodically along the working axis at an impact rate. A drive control (18) of the hammer mechanism (6) sets the impact rate to a set point value. A vibration absorber (19) has an oscillator (21) that moves along the working axis (12) about a resting position and one or multiple springs (20) that drive the oscillator (21) back into the resting position. A calibration phase comprises the following steps: detection of an acceleration using the acceleration sensor (24); determination of a minimum of the acceleration by varying the impact rate in a range of between 90% and 110% of the set point value; and adjusting the set point to the impact rate associated with the ascertained minimum.

    Power tool
    46.
    发明授权
    Power tool 有权
    电动工具

    公开(公告)号：US09553542B2

    公开(公告)日：2017-01-24

    申请号：US14744721

    申请日：2015-06-19

    Applicant: MAKITA CORPORATION

    Inventor： Yoshitaka Machida ,  Yoshitaka Ichikawa

    IPC: F16D65/14 ,  H02P29/00 ,  B25D16/00 ,  B23D51/16 ,  B23D59/00 ,  B25D11/00 ,  H02P7/18

    CPC classification number: H02P29/20 ,  B23D51/16 ,  B23D59/001 ,  B25D11/00 ,  B25D16/00 ,  B25D16/006 ,  B25D2250/201 ,  B25D2250/221 ,  H02P7/18

    Abstract: A hammer drill (100) comprises an electric motor (110), a piston (127) as a driving member and a controller (199) which controls and drives the electric motor (110). The piston (127) is reciprocated by rotation of the electric motor (110) and thereby a hammer bit (119) is driven in its longitudinal direction. The hammer bit (119) is moved forward in response to a forward movement stroke of the piston (127) and thereby a hammering operation is performed by the hammer bit (119). The controller (199) sets a duty ratio of a driving pulse signal which drives the electric motor (110) in the forward movement stroke of the piston (127) to be larger in order to prevent a reduction of a rotation speed of the electric motor (110) due to a load applied on the electric motor (110) during the forward movement stroke of the piston (127).

    Abstract translation: 锤钻（100）包括电动机（110），作为驱动构件的活塞（127）和控制和驱动电动机（110）的控制器（199）。 活塞（127）通过电动机（110）的旋转而往复运动，从而使锤头（119）在其长度方向上被驱动。 响应于活塞（127）的向前移动行程，锤钻头（119）向前移动，从而通过锤钻头（119）执行锤击操作。 控制器（199）将活塞（127）的前进行程中驱动电动机（110）的驱动脉冲信号的占空比设定得较大，以防止电动机的转速降低 （110）在活塞（127）的向前移动行程期间由于施加在电动机（110）上的负载而产生。

    Electric boring tool
    47.
    发明授权
    Electric boring tool 有权
    电钻工具

    公开(公告)号：US09314855B2

    公开(公告)日：2016-04-19

    申请号：US13147492

    申请日：2010-02-01

    Applicant: Takahiro Ookubo ,  Kazutaka Iwata

    Inventor： Takahiro Ookubo ,  Kazutaka Iwata

    IPC: B25D11/00 ,  H02P7/00 ,  B25F5/00 ,  B23B45/02 ,  B25D16/00 ,  H02P6/06 ,  H02P23/03 ,  H02P27/08

    CPC classification number: B23B45/02 ,  B25D16/006 ,  B25D2211/061 ,  B25D2222/72 ,  B25D2250/055 ,  B25D2250/095 ,  B25D2250/201 ,  B25D2250/221 ,  B25D2250/255 ,  H02P6/06 ,  H02P23/03 ,  H02P27/08 ,  Y02P70/173

    Abstract: An electric boring tool comprises an electric motor, a switch trigger, a tip tool driven by driving force of the electric motor, a power transmission mechanism for transmitting the driving force of the electric motor to the tip tool as rotational force and/or hammer force, and a motor control unit for controlling speed of the electric motor in response to an extent of pulling of the switch trigger. The motor control unit subjects the electric motor to low speed control after the electric motor is started up, and controls the speed of the electric motor in response to the extent of pulling of the switch trigger when the load current of the electric motor is set value or greater during the low speed control.

    Abstract translation: 一种电钻具，包括电动机，开关扳机，由电动机的驱动力驱动的尖端工具，用于将电动机的驱动力传递到尖端工具的动力传递机构，作为旋转力和/或锤力 以及电动机控制单元，用于响应于开关触发器的拉动程度来控制电动机的速度。 电动机控制单元在电动机起动之后使电动机进行低速控制，并且当电动机的负载电流设定值时响应于开关触发器的拉动程度来控制电动机的速度 或更高。

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