小起重量(5～10吨)双梁桥式起重机一般由交流JZR型电动机、JZQ型卧式减速箱、ZSC型立式减速箱、JWZ型制动器等组成传动系统,现行的设计存在下述缺点。 1.吊钩中心线不在小车轨距的中点,即图1的A≠B。为了保证起重机两条主梁受力相等,应尽量使A=B。目前的一些设计常偏心数十毫米,希望予以改进。 Small lifting capacity (5 ~ 10 tons) Double girder overhead traveling cranes generally by the AC JZR motor, JZQ horizontal gear box, ZSC vertical gear box, JWZ-type brake and other components of the transmission system, the current design has the following shortcomings . 1. Hook center line is not in the middle of the car gauge, that is, A ≠ B in Figure 1. In order to ensure that the crane two girders equal force, should try to make A = B. At present, some designs are often eccentric by tens of millimeters in the hope of improving them.