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    • 8. 发明公开
    • IMPACT TOOL
    • IMPACT工具
    • EP3269513A1
    • 2018-01-17
    • EP17181051.8
    • 2017-07-12
    • Makita Corporation
    • MACHIDA, Yoshitaka
    • B25D11/06B25D16/00
    • B25D16/003B25D11/062B25D2250/051B25D2250/131F16D13/24F16D13/52F16D21/08
    • First and second clutch mechanisms (41, 45) of a hammer drill are disposed between an intermediate shaft (31) and a rotary body (33) on a power transmission path from a motor to a swinging member (34) and configured to transmit rotation of the intermediate shaft (31) to the rotary body (33). A tool holder (13) and a piston sleeve (37) are configured to move together as a movable unit with respect to a body housing (11) between a foremost position and a rearmost position in a direction of a hammering axis (Al), according to a pressing force applied to the tool holder (13) via a tool accessory (19). The first and second clutch mechanisms (41, 45) each start transmission while the movable unit moves from the foremost position to the rearmost position and interrupt transmission while the movable unit moves from the rearmost position to the foremost position.
    • 锤钻的第一离合器机构(41)和第二离合器机构(45)配置在从马达到摆动部件(34)的动力传递路径上的中间轴(31)与旋转体(33)之间, 的中间轴(31)的旋转体(33)。 工具架(13)和活塞套筒(37)构造成作为可移动单元在锤击轴线(A1)的方向上在最前位置和最后位置之间相对于本体壳体(11)一起移动, 根据经由工具附件(19)施加到工具保持器(13)的压力。 第一和第二离合器机构(41,45)在可移动单元从最前位置移动到最后位置时开始传输,并在可移动单元从最后位置移动到最前位置时中断传输。
    • 10. 发明公开
    • POWER TOOL
    • 电动工具
    • EP2960018A1
    • 2015-12-30
    • EP15172825.0
    • 2015-06-19
    • Makita Corporation
    • MACHIDA, YoshitakaICHIKAWA, Yoshitaka
    • B25D16/00B23D51/16B23D59/00B25D11/00
    • H02P29/20B23D51/16B23D59/001B25D11/00B25D16/00B25D16/006B25D2250/201B25D2250/221H02P7/18
    • 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).
    • 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,从而锤头(119)沿其纵向被驱动。 锤头119响应于活塞127的向前运动行程而向前移动,从而由锤头119执行锤击操作。 控制器(199)将在活塞(127)的向前运动行程中驱动电动机(110)的驱动脉冲信号的占空比设置得较大,以防止电动机 (110)在活塞(127)的向前运动行程期间施加在电动机(110)上的负载。