关于二手叉车你知道多少？

所谓叉车是用货叉或其他作业设备自行装卸货品的起升车辆。属于物料转移机械。广泛使用于车站、港口、机场、工厂、库房等国民经济各部门，是机械化装卸、堆垛和短间隔运送的高效设备。自行式叉车出现于1917年。第二次世界大战期间，叉车得到开展。我国从20世纪50年代初开始制作叉车。叉车按结构分类有：平衡重叉车、前移叉车、旁边面叉车、插腿叉车、跨车和特种叉车6类。其间平衡重叉车使用广，常简称为叉车。叉车转移的对象大多是成件物品。将货叉换装各种用具(叉车属具)后，又可转移多种货品。
a fork lift truck is a self lifting cargo vehicle loaded with fork or other operation equipment. it belongs to material transfer machinery. it is widely used in stations, ports, airports, factories, warehouses and other departments of the national economy. it is an efficient equipment for mechanized loading and unloading, stacking and short-interval transportation. self propelled forklift truck appeared in 1917. the forklift was launched during the second world war. our country began to manufacture forklifts in early 1950s. forklift trucks are classified by structure into six categories: balanced forklift truck, forward forklift truck, side forklift truck, legged forklift truck, crossing truck and special forklift truck. in the meantime, the balance weight forklift is the most widely used, often referred to as forklift. most of the forklift transfer objects are articles. after changing all kinds of appliances (forklift), fork can also transfer many kinds of goods.
叉车首要由以下几种设备组成：①动力设备。如内燃机和蓄电池-电动机等。②传动设备。分为机械、液力和液压传动设备。③转向设备。如转向器、转向轮、转向拉杆等。④作业设备。又称门架，由内门架、外门架、货叉架、货叉、链轮、链条、起升油缸和歪斜油缸等组成。⑤液压体系和制动设备。表明叉车性能的首要参数是在规范起升高度和规范载荷中心距下的额外起重量。
forklift truck is mainly composed of the following equipment: (1) power equipment. such as internal combustion engines and battery motors. (2) transmission equipment. it is divided into mechanical, hydraulic and hydraulic transmission equipment. (3) steering equipment. such as steering gear, steering wheel, steering tie bar and so on. (4) operation equipment. also known as portal frame, by the internal portal frame, external portal frame, fork rack, fork, sprocket, chain, lifting cylinder and skew cylinder and other components. hydraulic system and brake equipment. it shows that the primary parameter of forklift performance is the additional lifting weight under the standard lifting height and the standard load center distance.
载荷中心距是货品重心到货叉笔直段前壁的间隔。 
the load center distance is the distance between the center of gravity of the goods and the front wall of the straight fork. 
叉车由动力设备﹑轮式底盘和作业设备三个首要部分组成﹐作业设备包括门架﹑链条﹑叉架﹑货叉和液压缸等。门架为弹性结构,铰接在车轴或车架上,通过歪斜液压缸可前后歪斜﹐以便于装卸货品和带货行驶。起升液压缸通过链条传动使装有货叉的叉架沿内门架升降﹐内门架叉以外门架为导轨上下弹性﹐使叉车能以较低的门架高度﹐把货品举升到较高的高度。
forklift truck consists of three main parts: power equipment, wheeled chassis and operation equipment. the operation equipment includes portal frame, chain, forklift, fork and hydraulic cylinder. the portal frame is an elastic structure, articulated on the axle or frame, and can be tilted back and forth through the tilted hydraulic cylinder to facilitate loading and unloading of cargo and driving with cargo. the lifting hydraulic cylinder makes the fork rack with fork lift along the inner gantry through chain transmission. the gantry rack outside the inner gantry fork is the upper and lower elasticity of the guide rail, so that the forklift truck can lift the goods to a higher height with a lower gantry height.
依据动力设备分电瓶叉车和内燃叉车两种。依据叉车的构造特色分直叉平衡重式﹑插腿式﹑前移式﹑侧叉式以及各种特别用处的特种叉车等。其间直叉平衡重式叉车使用为遍及。 直叉平衡重式叉车。货叉装在车体前端﹐伸出前轮中心线外。为了平衡货品重量发生的倾覆力矩﹐在车体尾部装有平衡重﹐作业时依靠叉车前后移动进行叉卸货品。 插腿式叉车。两条臂状的支腿伸向前方﹐支腿前端装有小直径的车轮﹐作业时货叉连同支腿一起插入货品底部﹐然后使货叉起升。因为货品位于车轮的支承面内﹐所以整车稳定性好。 前移式叉车。是插腿式叉车的变型﹐其货叉可在叉车纵向前后移动﹐装卸货品时货叉伸出,行驶时则退回到车体中部,整车稳定性好。 侧叉式叉车。门架和货叉面向叉车一侧﹐位于车体中部﹐并可横向一起移动﹐适用于转移长件货品﹐叉车行驶时﹐货品置于车体平台上﹐整车稳定性好。
according to power equipment, two types of battery forklift trucks and internal combustion forklift trucks are divided. according to the structural characteristics of forklift trucks, the forklift trucks with straight fork balancing weight, inserting legs, moving forward, side fork and various special forklift trucks for special use are designed. in the meantime, straight fork heavy weight forklift truck is the most