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为运送怕潮湿的货物,要求采用封闭式货车车体。在货车中一般将活顶理解为车顶可以打开,车顶开度至少能露出车辆底面积的80%或货物间纵向断面的80%。活顶结构型式有下列几种:翻顶(图1)、滑顶(图2)、卷顶成折叠顶(图3)和转顶(图4和5)。翻顶在货车的发展史中曾出现过,目前已淘汰,其主要缺点是: 1.在爬车顶去开闭翻顶时,容易发生事故; 2.带车顶纵向梁的翻顶车装货困难; 3.在无重力卸货装置情况下,带纵向梁的翻顶车卸货亦困难。 4.因翻顶车故障多,故维修费大,并因装粉状货物,而引起严重腐蚀。
For the delivery of goods afraid of damp, requires the use of enclosed wagon body. In a van, a living roof is generally understood to mean that the roof can be opened. The roof opening can reveal at least 80% of the bottom area of the vehicle or 80% of the longitudinal section of the cargo. There are several types of roof structures: roofing (Figure 1), roofing (Figure 2), roofing as the folding roof (Figure 3) and roofing (Figures 4 and 5). Flip roof has appeared in the history of the development of the truck has now been eliminated, the main drawbacks are: 1 in the top of the car climb to open and close the top, prone to accidents; 2 with roof longitudinal beam topping car Cargo difficulties; 3. In the absence of gravity discharge device, with a vertical beam of the top car unloading is also difficult. 4. Due to the failure of the over-top-caving vehicle, the maintenance cost is large and serious corrosion is caused due to the loading of powdered cargoes.