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    • 1. 发明授权
    • Power driven rotary device
    • 电动旋转装置
    • US06311787B1
    • 2001-11-06
    • US09551444
    • 2000-04-18
    • Robert A. BerryStephen A. DebeliusFrank O'Hara
    • Robert A. BerryStephen A. DebeliusFrank O'Hara
    • B25B1700
    • B25F5/001
    • A drill 30 for driving a bit 44 into a workpiece 50 includes an assembled anvil 58 and spindle 38, which are mounted for rotation together and for axial movement together within a drill housing 32. A planet carrier 56 is driven by a motor 52 and, in turn rotatingly drives the anvil 58 and the spindle 38. A chuck 42 is attached to a forward end of the spindle 58 for rotation and axial movement therewith. A plurality of rollers 162 are mounted in nests 182 of a roller cage 176, are maintained in parallel with an axis of the drill 30, and the anvil 58. The rollers 162, which are included in an automatic spindle lock 33, can be wedged between a fixed surface 74 of the drill housing 32 and a movable surface 102 of the anvil for automatically locking the spindle 38 with the housing. Following withdrawal of the bit 44 from the workpiece 50, an automatic brake 35 provides facility for braking the spindle 38. When the planet carrier 56 ceases to be driven, the anvil 58 and the spindle 38 are in a coasting mode relative to the slowing speed of the planet carrier 56. An automatic drag system 37 provides a drag between the coasting anvil 58 and the planet carrier 56 to bring the coasting speed of the anvil generally in line with the slowing speed of the planet carrier.
    • 用于将钻头44驱动到工件50中的钻头30包括组装的砧座58和主轴38,其被安装成一起旋转在一起并用于在钻壳体32内一起轴向移动。行星架56由马达52驱动, 继而旋转地驱动砧座58和主轴38.卡盘42附接到心轴58的前端,用于与其一起旋转和轴向移动。 多个辊162安装在滚子保持器176的巢182中,与钻头30的轴线和砧座58保持平行。包括在自动主轴锁33中的滚子162可以楔入 在钻子壳体32的固定表面74和砧座的可移动表面102之间,用于将主轴38与壳体自动锁定。 在从工件50取出钻头44之后,自动制动器35提供用于制动主轴38的设备。当行星架56停止驱动时,砧座58和主轴38相对于减速速度处于滑行模式 自动牵引系统37在惯性砧58和行星架56之间提供牵引力,以使砧座的滑行速度大体上与行星架的减速速度相一致。