起动发动机装配

[中文适用范围]： 本 SAE 推荐做法的目的是为安装启动电机提供标准化尺寸。建议在飞轮壳中提供最小深度为 2.54 毫米（0.100 英寸）的完整对准直径，以确保正确控制齿轮中心距离和节圆直径之间的间隙。启动电机引导直径与飞轮壳中的记录直径之间的间隙应为最小 0.03 毫米（0.001 英寸）到最大 0.25 毫米（0.010 英寸）。 [外文原描述]： The purpose of this SAE Recommended Practice is to provide standardized dimensions for mounting starting motors. (See Figures 1 through 4 .)It is recommended that a full register diameter having a minimum depth of 2.54 mm (0.100 in) be provided in the flywheel housing to insure proper control of gear center distance and clearance between pitch diameters. The clearance between the starting motor pilot diameter and the register diameter in the flywheel housing should be 0.03 mm (0.001 in) minimum to 0.25 mm (0.010 in) maximum.Text noted with an asterisk in Figures 1 , 2 , and 3, should not exceed root radius of pinion in order to provide clearance for the flywheel.The face of the starting motor mounting flange should be relieved at its junction with the pilot diameter to avoid mounting interference with flywheel housing.For backlash allowance between the pinion and ring gear refer to SAE J543.Dimensional units—millimeter (inch)Cross Reference: J543