公开(公告)号：US20020170185A1

公开(公告)日：2002-11-21

申请号：US10147396

申请日：2002-05-15

Applicant: MAKITA CORPORATION

Inventor： Masaki Kondo ,  Ichio Sakabe ,  Shinji Hirabayashi

IPC: B25F003/00 ,  B23D049/16

CPC classification number: B25F5/021 ,  B23D49/162 ,  B23D51/00

Abstract: An electric jigsaw (1) includes a main housing (2) containing a gear housing (10), a reciprocating rod (11) vertically projecting from within the gear housing, a saw blade (13) coupled to the rod via a coupling ring (12), and a transparent synthetic resin guard (14) provided at the lower front end of the main housing and the gear housing (10). The transparent guard includes a vertical optical path therethrough and is attached to the gear housing in such a manner as to be horizontally rotatable between a protective position for covering the coupling ring and an open position for exposing the coupling ring. Additionally included in the jigsaw is an insulating cover (15) assembled to the gear housing (10) within the main housing (2) and a downward oriented light-emitting diode (19) disposed at the bottom end of the insulating cover (15) directly above the transparent guard (14) when the guard is in its protective position. The light from the LED is transmitted through the front guard along the optical path, illuminating a workpiece (W) immediately forward of the blade without significant scattering or diffusion.

Abstract translation: 电动拼图（1）包括容纳齿轮壳体（10）的主壳体（2），从齿轮壳体内垂直突出的往复杆（11），经由联接环联接到杆的锯片（13） 12），以及设置在主壳体的下前端和齿轮壳体（10）上的透明合成树脂护罩（14）。 透明防护罩包括穿过其中的垂直光路，并且以能够在用于覆盖联接环的保护位置和用于暴露联接环的打开位置之间水平地旋转的方式附接到齿轮壳体。 另外，在拼图中还包括组装到主壳体（2）内的齿轮壳体（10）的绝缘盖（15）和设置在绝缘盖（15）底端的向下定向的发光二极管（19） 当护罩处于其保护位置时，在透明防护罩（14）的正上方。 来自LED的光沿着光路传输通过前护罩，在刀片的正前方照射工件（W），而不会有明显的散射或扩散。

公开(公告)号：US20040255475A1

公开(公告)日：2004-12-23

申请号：US10874602

申请日：2004-06-23

Applicant: Makita Corporation

Inventor： Shinji Hirabayashi ,  Kenji Kobayashi

IPC: F16H021/44

CPC classification number: B23D51/16 ,  Y10T74/18248

Abstract: It is an object of the present invention to provide a useful technique for effectively reducing vibration in a reciprocating power tool with a simple structure. According to the present invention, a representative reciprocating power tool includes a motor, a tool bit, a slider, a motion converting mechanism and a counter weight. The tool bit performs a predetermined operation by reciprocating. The slider reciprocates to drive the tool bit. The motion converting mechanism converts a rotating output of the motor into a reciprocating movement of the slider. The counter weight is provided in the motion converting mechanism. Further, the counter weight reciprocates in a direction opposite to the reciprocating direction of the slider. The phase difference between the reciprocating movement of the slider and the reciprocating movement of the counter weight is set such that a time lag is provided between the instant when the slider reaches a top dead center and the instant when the counter weight reaches a bottom dead center. With such construction, timing for reducing the kinetic energy caused by the reciprocating movement of the slider can be optimized, taking into account a cutting resistance that the tool bit receives from the workpiece during operation.

Abstract translation: 本发明的目的是提供一种用于有效减少具有简单结构的往复动力工具中的振动的有用技术。 根据本发明，代表性的往复动力工具包括马达，工具钻头，滑块，运动转换机构和配重。 工具位通过往复运动执行预定的操作。 滑块往复运动以驱动刀头。 运动转换机构将电动机的旋转输出转换成滑块的往复运动。 配重设在运动转换机构中。 此外，配重在与滑块的往复运动方向相反的方向上往复运动。 滑块的往复运动与配重的往复运动之间的相位差被设定为使得在滑块到达上止点的时刻和当配重达到下止点时的时刻 。 通过这样的结构，考虑到刀具在工作过程中从工件接收的切削阻力，可以优化用于减小由滑块往复运动引起的动能的定时。