Main driving turnover device of super-large-diameter shield tunneling machine

The utility model discloses a main driving turnover device of a super-large diameter shield tunneling machine, which comprises an arc-shaped turnover base and turnover parts arranged at the two end parts of the turnover base, and the turnover comprises the following steps of: taking the lower part of a shield body block as the turnover base; hoisting the upturning part; the connecting lifting lugsare turned over; when the main drive rotates to 90 degrees, hook changing operation is carried out; after the hook is successfully replaced, continuously overturning; and when the main drive rotatesto 180 degrees, the motor and the speed reducer are connected with the lifting hook after being installed, and the two lifting parts act in opposite directions till the main drive is located at the vertical position. The main drive descends through the hydraulic oil cylinders on the two sides. Original main drive integral hoisting turnover operation is ingeniously converted into rotary turnover operation, when the main dri