PIN SHAFT, PIN SHAFT MOUNTING STRUCTURE, AND CONCRETE PUMPING APPARATUS

摘要

A pin shaft, a pin shaft mounting structure, and a concrete pumping apparatus. The pin shaft (100) comprises a main body (110). The main body (110) comprises a cavity (120) extending along the axial direction of the pin shaft. The pin shaft (100) also comprises an axis part (130). The cavity (120) comprises at least one end part provided along the axial direction of the pin shaft. The axis part (130) is provided at the at least one end part. The pin shaft utilizes the axis part thereof to withstand a shear load, and utilizes a part corresponding to the cavity to withstand a bending moment load, thus allowing the material of the pin shaft to achieve optimum distribution, and implementing the goal of reducing the weight of the pin shaft. The pin shaft is hollow, therefore the inner and outer surfaces of the pin shaft are allowed to be fully tempered and quenched, thus increasing the strength of the axis part, thereby increasing the overall strength of the pin shaft.