CRANK SHAFT

摘要

A crank shaft is provided. The crank shaft comprises: multiple pairs of crank arms which are located in a direction and has a crossing angle that is out of a multiple of a crank angle represented as the number of dividing cylinders at an angle of 720 degrees; crank pin journals located between the crank arms; and crank shaft journals which are located between the crank pin journals and connect the crank arms.