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在1964年第四届国际土木建筑机械展览会上,法国PINGON公司首次展出了一台PINGON12A型液压輪胎式挖掘机。这台挖掘机是以一个結实和整体的“机构箱”为中心,其它装置安装在它的周围。机构箱系装在巨型工作平台上的滾珠或滾柱迴转环上,并能相对于工作平台迴轉。在机构箱內,后部装有发动机、主离合器、变速箱;前部装有机架、工作装置的支承、操縱室、液压油箱等;在机构箱的两侧上,各装有一对支撑車輪的鑄鋼鉸节臂。鉸节臂机构內有鏈式传动装置,由位于側面的
At the 4th International Civil Construction Machinery Exhibition in 1964, the French company Pingon exhibited for the first time a PINGON 12A hydraulic tire excavator. The excavator is centered around a sturdy and integral “mechanism box” with other devices mounted around it. The mechanism box is mounted on a ball or roller slewing ring on a giant work platform and can rotate relative to the work platform. In the mechanism box, the rear part is equipped with an engine, a main clutch, and a gearbox; the front part is provided with a frame, a work device support, a control room, a hydraulic oil tank, etc.; on both sides of the mechanism box, a pair of supporting wheels are provided respectively. Cast steel hinge arm. The articulated arm mechanism has a chain gear inside, which is located on the side