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    • 1. 发明授权
    • Bit attaching arrangement for power tool
    • 电动工具的钻头安装
    • US06224304B1
    • 2001-05-01
    • US09265275
    • 1999-03-09
    • Allen P. SmithDale K. Wheeler
    • Allen P. SmithDale K. Wheeler
    • B23C120
    • B23B31/201B23B2260/078B24B23/02B24B45/00B27C5/10Y10T279/17632Y10T279/3451Y10T408/953Y10T409/306608
    • A bit attaching arrangement for a power tool has a collet nut threadably engaging a rotatably driven shaft of the power tool. The collet nut has a plurality of slots positioned on an outer peripheral surface. A first gear is disposed on the shaft so that rotation of the first gear causes rotation of the shaft. An actuating member having a second gear associated therewith is attached to the housing of the power tool. The actuating member also has a slot-engaging extension associated therewith. The actuating member is positionable between a first position and a second position. In the first position, the second gear engages the first gear and the extension engages one of the slots of the collet nut such that rotation of the actuating member results in rotation of the shaft while maintaining the collet nut at a generally fixed rotational location. In a second position, the first and second gears do not engage one another and the extension does not engage any of the slots of the collet nut such that the shaft can be freely rotated during operation of the power tool.
    • 用于动力工具的一种连接装置具有与电动工具的可旋转地驱动的轴螺纹接合的夹头螺母。 夹头螺母具有位于外周面上的多个槽。 第一齿轮设置在轴上,使得第一齿轮的旋转引起轴的旋转。 具有与其相关联的第二齿轮的致动构件附接到电动工具的壳体。 致动构件还具有与其相关联的狭槽接合延伸部。 致动构件可定位在第一位置和第二位置之间。 在第一位置,第二齿轮接合第一齿轮并且延伸部接合夹头螺母的一个槽,使得致动构件的旋转导致轴的旋转,同时将夹头螺母保持在大致固定的旋转位置。 在第二位置,第一和第二齿轮不彼此接合,并且延伸部不接合夹头螺母的任何槽,使得轴在电动工具的操作期间可以自由旋转。