The transfer locking device is composed of locking gear, rack and action bar. It is the rotation movement into a linear movement to drive the displacement of the switch, the final completion of the switch internal locking.When the switch is in the positioning or reverse position and the point rail is close to the basic rail, the arc of the locking device coincides with the sharp tooth surface of the rack. If the point is moved by a force, or the train moves behind a switch, the rack is subjected to a horizontal force. These forces can only be transmitted radially to the locking gear along the locking arc. It does not rotate, and the rack and action bar fixed in its round hole do not move. , locking the switch.Each time you switch the electric switch, you must unlock, switch and lock the locking gear and rack.(5) automatic switchAutomatic turnout is used for timely and accurate reflection of the turnout position, complete the motor control and extrusion turnout presentation function.In the process of unlocking, the automatic switch contact disconnects the original switch circuit and connects the action circuit to be reversed. After locking, the automatic switch contact automatically disconnects the motor switch circuit and connects the display circuit. The automatic switch is composed of 4 rows of static contacts, 2 rows of moving contacts, 2 fast moving claws, 2 check posts and fast moving parts. The static contact, the moving contact, the quick moving claw and the inspection column are mounted symmetrically on both sides of the main shaft.The indicator bar of the electric switch machine and the indicator bar are connected with the connecting rod of the switch to follow the switch, which is used to check whether the point rail is close to, and whether the point rail is positioned or inverted. The indicator bar is composed of a front indicator bar, a rear indicator bar and two inspection blocks. The two rods are held together by tightening bolts and adjusting nuts. The front indicator bar is provided with a connecting head at the front end, which is used to connect the switch indicator bar.