Diesel engine crankshaft assembly

The utility model provides a crankshaft assembly of a diesel engine which mainly consists of a crankshaft, a crankshaft plug and a stop pin. A thread hole is arranged on the end face of a cleaning room which is arranged in the middle hollow part of a rod neck of the crankshaft. The crankshaft plug is arranged in the thread hole through a thread; a radial through groove is additionally arranged on the end face of the outer side of the crankshaft plug; a radial pinhole is correspondingly arranged at the position where the through groove is corresponding onto the hole-wall of the crankshaft thread hole; the stop pin is inserted into the pinhole and the through groove. Because the utility model is additionally provided with the radial through groove on the crankshaft plug and the radial pinhole on the hole-wall of the crankshaft threaded hole, and the stop pin can be inserted into the radial through groove and the radial pinhole, thus, the problem of easy abscission of the crankshaft plug during the operation of the diesel engine can be solved, thus increasing the working reliability, prolonging the service life. The utility model adopts the original assembly structure with good replacing ability and generality.