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    • 9. 发明公开
    • Power tool
    • 电动工具
    • EP2380702A3
    • 2013-11-06
    • EP11163478.8
    • 2011-04-21
    • Makita Corporation
    • Ota, TomoyukiFurusawa, MasanoriYamauchi, Ken
    • B24B23/02B24B45/00B25F3/00
    • B24B23/02B24B45/003Y10T279/16Y10T279/33Y10T279/3406Y10T279/3487
    • An effective technique is provided for rationally clamping and holding various kinds of tool bits which can be selectively replaced with each other and attached to the driving shaft, in a power tool
      The power tool includes a driving shaft 125 for driving a tool bit 109A or 109B which is arbitrarily selected from various kinds of tool bits, a first clamping element 133 provided on the driving shaft 125 and a second clamping element 135A, 135B provided separately from the driving shaft 125 and can be fixed to the driving shaft 125. The selected tool bit 109A, 109B is clamped and held between the first clamping element 133 and the second clamping element 135A, 135B. Various kinds of the tool bits 109A, 109B have holes 163, 167 formed according to the kind of the tool bit, and either one of the first clamping element 133 and the second clamping element 135A, 135B has various kinds of protruding engagement parts 149, 153 appropriate to the kind of the tool bit 109A, 109B and engaged with the holes 163, 167 formed according to the kind of the tool bit 109A, 109B.
    • 提供了一种有效的技术,用于在动力工具中合理地夹持和保持各种可相互替换并附接至驱动轴的工具头。动力工具包括用于驱动工具头109A或109B的驱动轴125 其可以从各种工具头中任意选择,设置在驱动轴125上的第一夹紧元件133和与驱动轴125分开设置的第二夹紧元件135A,135B,并且可以固定到驱动轴125上。 钻头109A,109B被夹紧并保持在第一夹紧元件133和第二夹紧元件135A,135B之间。 各种工具头109A,109B具有根据工具头的种类形成的孔163,167,并且第一夹紧元件133和第二夹紧元件135A,135B中的任一个具有各种突出接合部149, 它们适合于工具头109A,109B的种类并且与根据工具头109A,109B的种类形成的孔163,167相接合。