Engine bearing bush mistakenly-assembling-preventing double-layer switching type charging tray device and assembling method

The invention belongs to the technical field of automobiles, and particularly relates to an engine bearing bush mistakenly-mounting-preventing double-layer alternative type tray device and an assembling method. Comprising a support body, a double-layer cutting working tray and a grating. A plurality of grids are arranged on the bracket body; the grid is provided with a double-layer cutting working tray and a grating; and the double-layer switching working tray and the grating are connected with a production line control system. The double-layer switching working tray comprises a lower-layer tray, a handle, an upper-layer tray, a hinge mechanism, a tray base, a tray supporting block assembly and a proximity switch assembly. Two working states are designed, and the judgment function of the proximity switch assembly is combined, so that the problem of misloading of bearing bush varieties during mixed line loading of two types of engines is solved. 本发明属于汽车技术领域，具体的说是一种发动机轴瓦防错装双层切替式料盘装置及装配方法。包括支架本体、双层切替工作料盘和光栅；所述支架