公开(公告)号：US5601387A

公开(公告)日：1997-02-11

申请号：US486665

申请日：1995-06-07

申请人： Christopher P. Sanford ,  Ashok S. Subramanian

发明人： Christopher P. Sanford ,  Ashok S. Subramanian

IPC分类号： B25B21/00 ,  B25B23/00

CPC分类号： B25B23/0064 ,  Y10T408/566 ,  Y10T408/99

摘要： A depth adjusting system particularly for power-driven screwdrivers comprising an adjustment collar that is releasably fitted to the housing of the tool and a depth locator which screws onto the collar for non-rotational axial movement relative to the housing. The adjustment collar has a rearward cylindrical portion that includes an inner circumferential surface having a circumferential groove and a plurality of axially extending recesses. The depth adjusting system further comprises a pair of arcuate spring members attached to the nose portion of the housing and formed to include an arcuate rib portion for engaging the circumferential groove. The arcuate spring members also include a plurality of cantilevered spring fingers for biasing the arcuate rib portions into engagement with the circumferential groove. Further, the arcuate spring members are each formed to include detent projections adapted to engage one of the plurality of axially extending recesses for positively locating the subassembly with respect to the nose portion of the housing. The adjustment collar and depth locator subassembly may be removed from the housing as a unit without disturbing the depth setting through the application of axial force which causes the pair of arcuate spring members to flex inwardly against the bias of their cantilevered spring fingers.

摘要翻译： 特别是用于动力驱动的螺丝刀的深度调节系统，其包括可释放地装配到工具的壳体上的调节环，以及将相对于壳体非旋转轴向运动的深度定位器。 调节环具有后圆柱形部分，其包括具有周向凹槽和多个轴向延伸的凹部的内圆周表面。 深度调节系统还包括一对弓形弹簧构件，其附接到壳体的鼻部，并形成为包括用于接合周向凹槽的弓形肋部分。 弓形弹簧构件还包括多个悬臂弹簧指，用于将弓形肋部分偏置成与周向凹槽接合。 此外，弧形弹簧构件各自形成为包括适于接合多个轴向延伸凹部中的一个的止动突起，用于相对于壳体的鼻部部分积极地定位子组件。 调节环和深度定位器子组件可以作为一个单元从壳体中移除，而不会通过施加轴向力而扰乱深度设定，这导致一对弓形弹簧构件抵抗其悬臂弹簧指的偏压向内弯曲。