直齿端齿盘分度定位,是靠上下两齿盘的精确啮合来实现的。因此两齿盘的齿与齿槽的尺寸、形状应完全一致。为了保证两齿盘的齿和齿槽一样,以齿槽来说,其在理论上必须成三棱锥形,锥顶必在齿盘中心线及啮合中心平面的交点上。齿形在轴向视图(A-A剖视图)中,是以定位中心为圆心,辐射状分布在圆周上。而在横剖视(正视图及B-B)中,盘齿相对啮合中心平面,需有一加工斜角β,角的顶端也位于齿盘中心线及啮合中心平面的交点上。角β Straight-tooth end gear indexing positioning, is by two accurate upper and lower gear meshing to achieve. Therefore, the gear teeth and alveolus two tooth plate size, shape should be exactly the same. In order to ensure that the teeth and the cogs of the two toothed discs are the same, in the case of the cogs, they must theoretically have a triangular pyramid with the top of the cone at the intersection of the centerline of the cogwheel and the plane of the engaging center. In the axial view (A-A cross-sectional view), the tooth profile is centered on the center of the positioning and radially distributed over the circumference. In cross-sectional view (front view and B-B), the gear teeth are meshed with the center plane, and a bevel angle β is required. The top of the corner is also located at the intersection of the center line of the gear plate and the center plane of engagement. Angle β