SCREW-TYPE ELECTRIC SWITCH MACHINE Russian patent published in 2002 - IPC

FIELD: railway automatic control and telemechanics; electric switch machines. SUBSTANCE: electric switch machine has electric motor, coupling, rocking boll and screw pair, auxiliary units, and rack locking mechanism, all mounted in common case.. Rack locking mechanism incorporates lock body with two pairs of cams symmetrically held in position to form, together with body and rack, integral movable structure; pusher mounted for displacement along guide and rigidly coupled with rocking boll and screw pair nut provided with frictional nut travel limiters; and stop, all these components are coupled with round-section rack. EFFECT: simplified design, enhanced reliability and service life. 2 cl, 6 dwg