汽车起重机底盘是采用固定支腿箱来保证车架具有足够承载能力的.为了使其能承受较大的起动力矩,这种底盘还应具有高的强度和抗扭刚度.目前国内外生产的汽车起重机底盘的固定支腿箱,多为“普通箱形”结构(见图1).由图1可见,因结构的限制,这种活动支腿箱的活动端在车架左右两 Truck crane chassis is fixed leg box to ensure that the frame has sufficient carrying capacity.In order to make it can withstand a greater starting torque, the chassis should also have high strength and torsional stiffness of the current domestic and foreign production of cars Crane chassis fixed leg box, mostly “common box-shaped” structure (see Figure 1) can be seen from Figure 1, due to structural constraints, the activities of leg box activities end left and right in the frame two