Locating device for machining cross shaft gear of commercial vehicle

The invention discloses a locating device for machining a cross shaft gear of a commercial vehicle, and belongs to the technical field of gear machining. The locating device comprises a baseplate, andthe lower surface of the baseplate is connected with a bearing a in a clamping mode; the inside wall of the bearing a is sleeved with a rotating shaft a of which the bottom end is fixedly connected with an output shaft of a driving motor, and the driving motor is fixedly installed on the inside wall of a protective shell; the protective shell is welded on the lower surface of the baseplate; clamping plates are formed by arranging two semicircular connecting pieces in different sizes, and the two clamping plates are staggered; the clamping plates above are driven through threaded columns to move downwards for fixing workpieces in cooperation with the clamping plates below, and the fixing effect is good; an electric push rod is controlled to extend or retract for driving a sliding block toslide in a sliding chute r