1.结构原理 刀具固定于镗杆1上(图1),电机驱动蜗杆5,带动蜗轮4,通过“U”型滑键带动丝杆8转动,丝杆8和镗杆1联结为一体,从而带动刀具旋转。蜗轮4和齿轮6(m=2.5,z=100)与丝杆一起旋转,齿轮 7(m=2.5,z=99,x=0.5)通过螺纹T85×12旋合在丝杆上。 差动机构,蜗轮4和齿轮6一起旋转时,通过齿轮9(m=2.5,L=20)带动齿轮7转动,由于齿轮7与齿轮6齿数相差1 1. Structural principle The tool is fixed on the boring bar 1 (Fig. 1). The motor drives the worm 5 to drive the worm wheel 4 to drive the screw 8 to rotate through the U-shaped sliding key. The screw 8 and the boring bar 1 are integrated together Driven tool rotation. Worm wheel 4 and gear 6 (m = 2.5, z = 100) are rotated together with the screw rod. Gear 7 (m = 2.5, z = 99, x = 0.5) is screwed onto the screw rod through a screw thread T85 × 12. When the worm gear 4 rotates together with the gear 6, the gear 7 rotates with the gear 9 (m = 2.5, L = 20). Since the number of teeth of the gear 7 and the gear 6 is different by 1