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    • 61. 发明授权
    • Movable blade guard and mounting for portable circular saws
    • 可移动刀片和便携式圆形安全带的安装
    • US3721141A
    • 1973-03-20
    • US3721141D
    • 1971-07-06
    • ROCKWELL MFG CO
    • FROSTAD L
    • B27B9/02B27G19/04
    • B27B9/02B27G19/04Y10T83/7734
    • A movable guard and mounting for portable motor driven circular saws in which the movable guard is directly journalled on the blade arbor shaft through an end thrust resisting antifriction bearing means arranged to isolate the movable guard from the rotational forces of the arbor shaft and accommodate the side thrust forces transmitted to the movable guard in use during its retractile movement effected by abutting engagement with the workpiece. The antifriction bearing means, being directly carried by the blade arbor shaft, is of minimal diameter permitting its installation well within the normal centrifugal discharge path of the chips and sawdust defined by the peripheral blade enclose lips of the fixed and movable guard in closely adjacent relation to the cutter blade mounting to form a labyrinth passage with the cutter blade mounting excluding entry of chips and sawdust.
    • 一种用于便携式马达驱动圆锯的可移动护罩和安装件,其中可移动护罩通过端部推力抵抗减摩轴承装置直接安装在叶片轴轴上,该装置被布置成将可动护罩与心轴的旋转力隔离并容纳侧面 在通过与工件的邻接接合而在其伸缩运动期间使用中传递到可移动护罩的推力。 由叶片轴轴直接承载的减摩轴承装置具有最小的直径,允许其安装在由外围刀片限定的切屑和锯屑的正常离心排放路径内,该固定和可移动的防护件的紧密相邻的关系 到切割刀片安装以形成迷宫通道,其中切割刀片安装不包括切屑和锯屑的进入。