一、单铰点结构
One, single pivot structure
单铰点是指前后主粱铰接只有一个铰点。该铰点既是工作铰点(越接近轨道面越好)又是非工作时铰点。在前大粱俯仰过程中为防止前后大梁承轨粱和轨道在铰点处的干涉，其轨道在接头处势必保留较大的间隙。小车在运行经过该铰点时，为防止冲击，要特别设计轨道的接头型式。
Single hinge point refers to the main beam hinged before and after only one hinge point. The hinge is a working hinge point (closer to the orbital plane is better) and is non work hinge point. On the front beam of pitch process in order to prevent large beam before and after Chenggui beam and rail in the hinge point of the interference, the track at the joints is bound to keep a larger gap. The car in the running through the hinge point, in order to prevent shock, joint type specially design track.
另外，单饺点的维修也很困难。一旦铰点处的轴承或轴需要维修更换，则需要采用特别的手段，将前大梁作用力释放(垂直和水平方向)，才能进行修理。
In addition, the single point is also very difficult to repair the dumpling. Once the bearing hinge point or axis need repair replacement, the need to adopt special methods, will release the front girder force (vertical and horizontal), be repaired.
二、双铰点结构
Two, double hinge structure
双饺点的型式通常是指前后主梁铰接分别在两个不同标高处布置相互独立的铰点。根据其位置的高低，称为上铰点和下饺点。下铰点的布置高度非常接近轨道面，上饺点的高度则远离轨道接头。大梁水平工况时，下铰点受力。由于该铰点位置非常接近轨面高度，工作中大梁绕下铰点的变位，导致轨道接头处变动量小。因此，轨道接头间眩可设最小。由于工作中小车轨道在接头处的间隙变化最小，小车轨道连接经平滑，减少冲击。而上铰点是大梁仰起时使用(大梁仰起后垂直力和水平力全由该铰点承受)，由于上饺点远离轨道面，所以变幅时前大梁上的轨道接头不会与结构和后大梁轨道干涉。
Two hinged point type usually refers to the hinge points before and after the main beam are respectively articulated in two different elevation layout independent of each other. According to its position, known as the hinge point and point under the dumplings. The lower hinge point arrangement height is very close to the rail surface, dumpling point height is far away from the rail joint. Beam horizontal condition, lower hinge point stress. Because the hinge point is very close to the rail surface height of beam around the lower hinge point shift work, leading to the track joints variable momentum. Therefore, the rail joint between glare can set the minimum. Because the rail car work gap change in the joints of the minimum, the trolley track are connected by smooth, reduce the impact. And on the hinge point is used up when the beam (girder lifted after the vertical and horizontal force by the hinge point bear), because dumplings points away from the track surface, so the amplitude of rail joints on the front girder and girder structure and not after the track interference.
桥式起重机