Three roller is divided into mechanical and electric brake machine movement principle, the so-called mechanical is passive rotating, push the by the customer; Dynamic movement is driven by motor power rotation. Dynamic movement high degree of automation, booster that turn lever function easily smoothly, especially when electricity can realize automatic lever.

Achievement by complex mechanical and electrical design, mechanical movement of smooth and automatic balancing of rotating rod, high reliability, easy maintenance.

From the view point of use, the three required thrust rod machine is very small, there is no need for electric power; Electric machine adopts the complex motor drive circuit and detection circuit, life has a high requirement of motor, and difficult to maintain, in the harsh climate damp, high temperature easy failure; Domestic subway used three strokes are all basically mechanical brake machine.