液压货梯http://www.jnliqiao.com/的使用率越来越普遍，由于各地区之间的温差变化太大，我国很多地区因气温过低给升降货梯的使用带来极大的不便，为满足液压货梯能在低温下正常可靠地运行，因此在设计和制造高空作业平台时应着重解决以下几个问题。

1、低温对液压货梯机件的脆性破坏，低温脆性破坏取决于材料、设计和工艺三个因素的综合作用。当温度降低时其屈服点增高，断裂韧度降低，而屈强比的增大和塑性、韧性的降低，起裂前的塑性变形量和起裂后裂纹扩展的阻力减小，导致机件的脆化趋势增加；设计出现截面的突变、应力与应变集中、缺口、多轴拉应力状态等；工艺出现焊接裂纹、未熔合、显微组织的恶化、残余拉应力等。
Low hydraulic freight elevator parts of brittle fracture, low brittle fracture depends on the material, design and workmanship combined effect of three factors. When the temperature is increased to reduce its yield point, fracture toughness decreases, and the yield is increased and stronger than the plastic, a decrease in toughness, plastic deformation before fracture initiation and post-initiation of crack growth resistance is reduced, resulting in brittle parts tendency to increase; the design section of the mutation occurs, the stress and strain concentration, gap, multiaxial tensile stress status; craft appeared welding cracks, lack of fusion, the deterioration of the microstructure and residual tensile stress.

2、液压货梯低温受力构件的焊接结构形式及焊接工艺，焊接前零件须经喷丸处理，去掉氧化层，清除油污和锈痕，手工焊接要严格控制焊条的干燥程度，焊条要经过烘干处理等。
Welded structure and welding technology of hydraulic freight elevator low force member before welding parts subject to shot peening, remove the oxide layer, removing grease and rust marks, hand soldering is necessary to strictly control the dryness of the electrode, the electrode to go through the drying process, etc.

3、液压货梯http://www.jnliqiao.com/液压油液压油的粘度至关重要，粘度过高，系统内部摩擦阻力增大，压力损失增多，油温上升过快，操作时动作滞后，粘度过低，泵的容积效率低，润滑性能差，零部件间运动摩擦阻力增大。
Critical hydraulic freight elevator hydraulic oil viscosity hydraulic oil viscosity is too high, the internal system friction increases, an increase in pressure loss, the oil temperature rises too fast, when operating actions lag, low viscosity, low volumetric efficiency of the pump, lubricating properties the difference between the component motion friction increases.