Novel crankshaft drive mechanism

The invention relates to a novel crankshaft drive mechanism. The novel crankshaft drive mechanism comprises an inner sleeve, wherein one end of a crankshaft is sleeved with the inner sleeve. The inner sleeve is sleeved with an outer sleeve, and two grooves are axially formed outside the inner sleeve; two working shafts are arranged in the grooves, and a plurality of working keys are arranged on the working shafts; four axial clamping grooves are evenly formed in the inner wall of the outer sleeve and can be matched with the working keys; and a key handle I is arranged at one end of one working shaft, and a key handle II is arranged at one end of the other working shaft. A clamping plate I is arranged on the outer wall of the key handle I, and a clamping plate II is arranged on the outer wall of the key handle II; the clamping plate I is located on the outer side of the clamping plate II; and the outer sleeve is sleeved with a large gear. The novel crankshaft drive mechanism is simple in structure, and the phenomenon that due to inertial descending of a sliding block, a mould is damaged by crushing can be effectively prevented, so that resource waste is prevented.