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伸缩臂起重机在吊装作业时,主要通过变幅油缸的伸缩实现吊臂仰角和幅度的变化,以完成各种不同工况下的吊装作业。吊臂与转台、转台与变幅油缸、变幅油缸与吊臂之间的链接铰点,称为起重机的三铰点。吊臂根部铰点和转台上铰点之间通过销轴连接,销轴通过装有螺栓的定轴板固定在转台上,吊臂可以绕销轴转动。变幅油缸上、下铰点也分别与吊臂上铰点和转台下铰点通过销轴连接,而销轴则用相同的方式固定在吊臂上铰点和转台下铰点处。定轴板的主要作用是防止销轴旋转,如
Telescopic crane crane lifting operation, mainly through the luffing cylinder telescopic boom elevation and amplitude changes in order to complete a variety of conditions under the hoisting operation. Boom and turntable, turntable and luffing cylinder, luffing cylinder and the link between the boom articulated point, known as the crane’s three hinge point. The hinge point between the boom root and the hinge point on the turntable is connected through a pin. The pin is fixed on the turntable through a fixed shaft plate with a bolt, and the boom can rotate around the pin. The upper and lower hinge points of the luffing cylinder are also respectively connected with the lower hinge point of the boom and the lower hinge point of the turntable through a pin, while the pin shaft is fixed on the lower hinge point of the boom and the lower hinge point of the turntable in the same manner. The main role of fixed-axis plate is to prevent pin rotation, such as