Auxiliary device for maintenance of traction motor of subway electric passenger car

The utility model provides an auxiliary device for maintenance of a traction motor of a subway electric passenger car, which relates to the technical field of traction motor maintenance, and comprises a crank, a rotary counting component and a contact counter, the crank is provided with a connecting part, a holding part and a working part which are connected with one another, a driving gear is fixedly mounted on the outer circumferential wall of the working part; the contact counter is provided with a second induction contact; the limiting groove is formed in the outer circumferential wall of the working part to install the rotary counting assembly, and the contact counter perpendicular to the axis of the working part is arranged on the outer circumferential wall of the working part. By means of the technical scheme, driven gears installed on the first installation plate and the second installation plate can be driven through a driving gear in the rotating process of the working part, then the number of turns