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无齿七孔钻具(见图)是用紧固螺钉将座1紧固在能做往复运动的动力头上。钻具随着动力头的往复运动,完成进给和退刀动作。偏心主轴14凸起部分与动力头主轴凹入部分相配合。机体5与座1用螺栓6连接在一起,用螺母紧固。连接板13装在偏心主轴14上,偏心钻杆8和10用轴承和圆螺母7、11固定在机体5上。并插在连接板13的铜套3中。当动力头主轴旋转时,偏心主轴14也旋转,这时连接板13便随着偏心主轴14的旋转而做圆周摆动,偏心钻杆8和10便随着自转。带动钻头进行钻削,同时加工七
Seven-hole drill without teeth (see photo) is to use a fastening screw to fasten the seat 1 to the reciprocating head. Drill with the power head reciprocating motion, to complete the feed and retraction movements. The protruding portion of the eccentric spindle 14 cooperates with the recessed portion of the power head spindle. The body 5 and the seat 1 are connected together by a bolt 6, which is fastened by a nut. The connecting plate 13 is mounted on the eccentric spindle 14, and the eccentric drill rods 8 and 10 are fixed on the machine body 5 with bearings and round nuts 7, 11. And is inserted in the copper sleeve 3 of the connecting plate 13. When the power head spindle rotates, the eccentric spindle 14 also rotates. At this moment, the connecting plate 13 swings circularly with the rotation of the eccentric spindle 14, and the eccentric drill rods 8 and 10 rotate along with the rotation. Driven drill for drilling, while processing seven