Thread proportioner and rotating mechanism

The utility model relates to the technical field of machining equipment, and provides a thread proportioner and a rotating mechanism, the thread proportioner comprises a thread proportioner shell, a main rotating shaft, an auxiliary rotating shaft, a push rod and a knob, the other end of the main rotating shaft is in screw-thread fit in the first internal thread section of the thread proportioner shell through the first external thread section on the surface of the main rotating shaft, and a second internal thread section extending in the axis direction of the main rotating shaft is arranged at the end, located in the thread proportioner shell, of the main rotating shaft. The thread pitch of the first external thread section and the thread pitch of the first internal thread section are both Mmm, the thread pitch of the second internal thread section and the thread pitch of the second external thread section are both M * Nmm, and N is a constant and is larger than 0. By means of the screw pitch ratio between t