Hoisting trolley of portal crane

The invention provides a crane carriage of a portal crane. Comprising a winding drum, a motor, a first electric telescopic shaft, a second electric telescopic shaft, a first three-in-one speed reducer, a second three-in-one speed reducer, a first driving wheel, a second driving wheel, a first driven wheel, a second driven wheel, a first gear, a second gear, a third gear, a fourth gear, a fifth gear, a sixth gear, a frame, a driving shaft, a driven shaft and a first output shaft. A second output shaft and a reel support. The crane carriage is simple in structure and convenient to install, the mass of the crane carriage is reduced by using one motor to work, the utilization efficiency of the motor is improved, and electric energy is greatly saved. 本发明提供一种门式起重机起重小车，包括卷筒、电动机、第一电动伸缩轴、第二电动伸缩轴、第一三合一减速机、第二三合一减速机、第一驱动轮、第二驱动轮、第一从动轮、第二从动轮、第一齿轮、第二齿轮、第三齿轮、第四齿轮、第五齿轮、第六齿轮、车架、驱动轴、从动轴、第一输出轴、第二输出轴和卷筒支架。本发明的起重小车结构简单，安装方便，使用一台电动机工作减轻了起重小车的质量，提高了电动机的利用效率，大大节省了电能。