The contact zone width of crane wheel with track is analyzed by plane stress elastic theory.
采用平面应力弹性理论，对吊车车轮与轨道的接触区尺寸进行理论分析。
2
In the crawler crane of the present invention, moreover, it is possible to improve the transportability because the width of the upper rotating body can be shortened.
此外，本发明的履带式起重机能够使上部旋转体的横宽尽可能地小，所以能够提高输送性。
3
If the request gate leg width is big, the working speed is high, or lifts heavy, the long big-ticket item frequently, then chooses the double Liang portal type hoist crane suitably.