大客车用气缸滚轮式自动门梯设计

Cylinder rolling type automatic door design of large sized bus

针对城市公交车和长途客车底盘距地面过高，造成老人、残疾人上下车不方便等问题，设计出一种能够伸缩或者旋转的自动门梯，该门自动门梯使得客车一级踏步得到有效降低，方便了特殊乘客上下车。

Aim at the chassis is higher from the ground for city bus and tourist bus,which make inconvenient for old people and disabled people to get on and off the bus,design a kind of automatic door which can automatically scaling or rotation,this automatic door make lower one step related with chassis,which is convenient for special passenger get on and off the bus.