我们在HBC 60型混凝土输送泵车的设计与试制过程中,对国外几种型式的混凝土泵车的主臂变幅机构进行了性能分析与比较,发现它们在主臂变幅三铰点的布置上各有不同,并且起升性能亦有所差异。在综合考察了国外多种型式的泵车之后,我们得到了一些经验,并摸索出一种主臂变幅机构的 During the design and trial production of the HBC 60 concrete pump truck, we analyzed and compared the performance of the main arm luffing mechanisms of several types of concrete pump trucks abroad, and found that they are arranged on the three-joint point of the main boom. Each is different, and the lifting performance is also different. After comprehensively investigating the various types of pump trucks in foreign countries, we gained some experience and explored a main arm luffing mechanism.