普通顶尖只起定位作用:拨动顶尖除了起定位作用外,还起传递切削力矩的作用。本文介绍一种结构新颖、工作可靠的内拨式拨动顶尖。它是靠夹紧元件与顶尖孔中的小圆柱孔表面之间的挤压作用来传递切削力矩的。这种力矩的传递机构与鸡心夹头或其他切削力矩传递机构相比,具有如下特点: Common top only from the role of positioning: In addition to the top toggle role in positioning, but also transfer the role of cutting torque. This article describes a novel structure, reliable work inside the dial toggle top. It is by the clamping element and the top of the small hole in the hole between the hole surface of the squeezing action to transfer cutting torque. This torque transmission mechanism and the center of the chick or other cutting torque transmission mechanism, has the following characteristics: