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    • 8. 发明申请
    • PLUG EJECTING HOLE SAW WITH TWIST-LOCKING INTERCHANGEABLE SAW CUPS
    • PLUG插入孔与双向可互换的SAW CUPS
    • WO01064379A1
    • 2001-09-07
    • PCT/US2001/007032
    • 2001-03-01
    • B23B51/04
    • B23B51/0473B23B51/0453Y10S408/703Y10T408/51Y10T408/895Y10T408/8957Y10T408/896Y10T408/8973Y10T408/907Y10T408/95Y10T408/957
    • A plug ejecting hole saw (20) includes a saw cup (22) having cutting teeth (39) at a front annular edge wall (40) thereof and a rear circular base wall (37) having therethrough a concentric, non-circular aperture (41). An arbor holder (21) removably attachable to saw cup (22) includes a collar (45) longitudinally slidably holding therewithin a central body (50) having a front nose piece (61) protruding forward of the collar, which has a transverse cross-sectional shape adapted to be insertably received into saw cup aperture (41). Nose piece (61) of the arbor holder (21) has through its length a coaxial bore (25) provided with internal left-hand threads which receive an arbor (23) having left-hand external threads (28), a rear shank portion (34) adapted to be clamped in a drill chuck, and a front collet flange (29) for clampingly receiving the shank (30) of a pilot drill (24). Rotating saw (20) in a clockwise sense to cut a hole (C) in a workpiece (D) forms a plug (E) lodged within the saw cup (22); reversing the drill with the saw cup cocked in the workpiece hole causes arbor (23) to threadingly advance forward from base (37) of the saw cup, causing collet flange (29) to advance and eject the plug from the saw cup.
    • 塞子排出孔锯(20)包括在其前环形边缘壁(40)处具有切割齿(39)的锯杯(22)和具有同心的非圆形孔的后圆形底壁(37) 41)。 可拆卸地附接到锯杯(22)的心轴保持器(21)包括一个可纵向滑动地保持在其中的中心体(50)的轴环(45),该中心体具有向前突出的前部鼻片(61) 剖面形状适于可插入地容纳在锯杯孔(41)中。 心轴保持器(21)的鼻部件(61)具有一个同轴孔(25),同轴孔(25)设置有内部左旋螺纹,该左内螺纹接收具有左侧外螺纹(28)的心轴(23) (34)适于夹紧在钻头卡盘中,以及用于夹紧地接收导向钻(24)的柄(30)的前夹头凸缘(29)。 旋转锯(20)以顺时针方向切割成工件(D)中的孔(C)形成嵌在锯杯(22)内的塞子(E); 用工作孔中的锯杯倒转钻头使得心轴(23)从锯杯的底座(37)向前螺纹前进,导致夹头凸缘(29)从锯杯前进并弹出塞子。