普通车床溜板箱中的自动走刀机构,是保证自动走刀正常进行和起着安全保险作用的一种装置。当需要进行自动走刀切削时,支承蜗杆的托架绕托架轴做小于90°的转动,将长板托起来,使蜗杆与蜗轮相啮合,达到自动走刀的目地。不需要自动走刀时,拨动手柄,使托架轴转动,托架也随之转动,致使长板失去支承后带动蜗杆绕小轴落下,使蜗杆与蜗轮分离,自动走刀停止。另外,当自动走刀遇到阻力或切削力过大时,保险装置的螺旋爪离合器将推动托架绕转轴转动一个角度,此时长板失去支承, Ordinary lathe slide box automatic walk mechanism, is to ensure the normal automatic walking and plays a role in safety and security of a device. When the need for automatic cutting, the support of the worm bracket bracket axis less than 90 ° rotation, the long board up, the worm and worm gear meshing, automatic knife to achieve the goal. Do not need to automatically take the knife, toggle the handle, the bracket shaft rotation, the bracket also will be rotated, resulting in long plate loss of support driven worm around the small shaft down, so worm and worm separation, automatic knife stop. In addition, when the automatic knife encounters resistance or cutting force is too large, the helical claw clutch of the safety device will push the bracket to rotate an angle about the rotation axis, at this moment, the long plate loses bearing,