Gear test box with adjustable center distance

The invention provides a gear test box with an adjustable center distance, and the gear test box comprises a gear box body which is provided with at least two circular hole structures; the center distance adjusting disc is mounted in one of the circular hole structures, a bearing seat mounting hole is formed in the center distance adjusting disc, and the bearing seat mounting hole and the center of the center distance adjusting disc are eccentrically arranged; gear shafts of various specifications are installed in the other circular hole structure on the gearbox body and a bearing seat installation hole of the center distance adjusting disc through bearings and bearing seats, and the distance between the other circular hole structure and the bearing seat installation hole is adjusted by adjusting the installation angular position of the center distance adjusting disc and the gearbox body. Therefore, the center distance between the two gear shafts is adjusted. According to the gear test box provided by the inv