POSITIVE FEED TOOL HAVING A CLUTCH
    81.
    发明公开
    POSITIVE FEED TOOL HAVING A CLUTCH 有权
    与进给驱动,离合机床

    公开(公告)号:EP1261450A2

    公开(公告)日:2002-12-04

    申请号:EP00938182.3

    申请日:2000-06-02

    IPC分类号: B23B47/00

    摘要: A positive feed tool includes a differential feed gear (246) and differential drive gear (244) coupled to a spindle (208) via spindle drive gear (250) and spindle feed gear (248) so that rotational drive and axial feed is imparted to the spindle during machining. In order to prevent torque overload of the tool or drive train, an apparatus and method is disclosed for limiting the transmission of power from the motor (202) to the spindle (208). Also disclosed is an apparatus and method for causing the spindle (208) to automaticaly retract when the high torque situation develops.

    POSITIVE FEED TOOL HAVING RETRACTABLE MEMBERS
    82.
    发明公开
    POSITIVE FEED TOOL HAVING RETRACTABLE MEMBERS 有权
    与进给驱动和可伸缩的SHARE机床

    公开(公告)号:EP1185395A2

    公开(公告)日:2002-03-13

    申请号:EP00939812.4

    申请日:2000-06-12

    IPC分类号: B23Q5/00

    摘要: A positive feed tool includes a differential feed gear (138) and differential drive gear (136) coupled to a spindle (108) via a spindle drive gear (140) and a spindle feed gear (142) so that rotational drive and axial feed is imparted to the spindle during machining. In order to retract the spindle (108), the differential feed gear (138) is held stationary by pins (156) whilst the differential drive gear (136) continues to rotate. An apparatus and method is disclosed for automatically causing the spindle (108) to stop retracting. The tool includes a device which automatically moves the pins (156) or other members away from the differential feed gear (138) whilst the spindle is retracting, causing the spindle to stop retracting.