关键词: 电液执行器（EHA）, 电液转辙机, 功能分析

Abstract: This paper introduces a switch machine with electro-hydraulic actuator as power source, and analyzes the structure of the electro-hydraulic actuator and the working principle of the switch machine. Because of the high integration and small size of the electro-hydraulic actuator, the new electro-hydraulic switch machine is smaller than the traditional one; The electro-hydraulic actuator is used as the integrated module of the electro-hydraulic actuating system. When the hydraulic transmission fails, it only needs to be replaced as a whole, and the maintenance is convenient; the hydraulic transmission of electro-hydraulic actuator is stable with long service life and is free of maintenance. Therefore, compared with the traditional electro-hydraulic switch machine, the new electro-hydraulic switch machine can effectively improve the working efficiency of the crossing workers, reduce the operation and maintenance cost of the crossing, and ensure the safety of the train operation to the greatest extent.

Key words: Electro-Hydraulic Actuator (EHA), electro-hydraulic switch machine, functional analysis