一個完整的液壓升降機系統是由五個部分組成：動力元件、執行元件、控制元件、輔助元件及液壓油。
A complete hydraulic lift system is composed of five parts: power components, the implementation of components, control components, auxiliary components and hydraulic oil.
 
液壓升降機將原動機的機械能轉換成液體的壓力能的是動力元件，動力元件一般指液壓升降平臺上的油泵。其結構形式一般有齒輪泵、葉片泵和柱塞泵。
The hydraulic lift is the original motive of the mechanical energy into fluid pressure energy is power element, power element generally refers to the oil pump of the hydraulic lifting platform. The structure of the general form of gear pump, vane pump and piston pump.

 將液體的壓力能轉換為機械能，驅動負載作直線往復運動或回轉運動的是執行元件。如液壓缸和液壓馬達。液壓升降機液壓系統中控制和調節液體的壓力、流量和方向的是控制元件。
The pressure of the liquid can be converted to mechanical energy to drive the load for a linear reciprocating or rotary motion is the implementation of components. Such as hydraulic cylinders and hydraulic motor. The control and regulation of the liquid pressure in the hydraulic system of hydraulic elevator, flow and direction of the control element.

油箱、濾油器、油管及管接頭、密封圈、壓力表、油位油溫計等這些是屬于輔助元件。
Oil tank, oil filters, tubing and pipe joints, seals, pressure gauge, oil level oil thermometer etc. These are auxiliary components.

 液壓升降機液壓油是液壓升降平臺系統中傳遞能量的工作介質，有各種礦物油、乳化液和合成型液壓油等幾大類
Hydraulic lift hydraulic oil is the work of the energy transfer medium hydraulic lifting platform in the system, there are a variety of mineral oil, emulsion type hydraulic oil and other categories