Engine gear train coplanarity measuring device

The utility model discloses an engine gear train coplanarity measuring device which comprises a reference plane ruler. The vernier caliper is provided with a main scale, a vernier scale and a clamping jaw unit; wherein the vernier caliper is arranged at the top end of the reference plane ruler, the reference plane of the reference plane ruler and the reference plane of the main ruler are located on the same plane, and the length direction of the reference plane ruler is perpendicular to the vernier caliper; and the clamping jaw unit is arranged at the outer end of the vernier scale. The device has the advantages that the manufacturing cost is low, the operation is convenient, the measurement accuracy is high, the coplane deviation value between engine gear trains can be quickly and accurately measured, and the planeness measurement of any 360-degree point of the belt pulley is realized. 本实用新型公开了一种发动机轮系共面度测量装置，包括基准平面尺；游标卡尺，所述游标卡尺具有主尺、游标尺和卡爪单元；其中，所述游标卡尺设置在所述基准平面尺顶端，基准平面尺的基准面与所述主尺的基准面处于同一平面，基准平面尺的长度方向与游标卡尺相互垂直；所