Shunt motor in step

The utility model discloses a shunt motor in step comprises a plurality of coaxial coordination's gear train module, and the gear train module includes the shell and rotates the gear of locating in the shell, is equipped with the liquid flow in the shell and says all, and the gear setting is in the liquid flow is said all, and the both ends that the liquid flow was said all form oil inlet and oil -out respectively on the shell, and the circulation had pressure oil to provide power for the motor in the liquid flow was said all. The utility model discloses, simple structure, convenient to use, low cost defeats when getting into from the oil inlet when oil, and it is rotatory to a direction to promote the gear, and when all gears when rotatory together, the fluid of the same volume is just discharged from the oil -out, and because fluid has an incompressible characteristic, equivalent fluid is distributed to the execute component of difference, realization execute component's synchronization in step through the