里程表主被动齿轮是轴交角成90°的螺旋齿轮传动,其分度圆螺旋角之和β1+β2=90°,旋向相同。故在设计这个特殊斜齿插齿刀时(简称插齿刀),让插齿刀在铣床上完全处于被动齿轮的地位,这是设计该刀的关键所在。 因为插齿刀与工件是螺旋齿轮的传动关系,因而在选定插齿刀的最大,最小 Odometer master and slave gear is a helical gear transmission shaft angle of 90 °, the pitch angle β1 + β2 = 90 °, the same direction of rotation. Therefore, in the design of this special bevel gear shaper (referred to as gear shaper), so that gear shaper on the milling machine completely in the passive gear position, which is the key to the design of the knife. Because the gear shaper and the workpiece is a helical gear transmission relationship, and thus selected gear shaper in the largest and smallest