Ultra-short electromechanical servo mechanism for mechanical fault self-recovery

An ultra-short mechanical fault self-recovery electromechanical servo mechanism, comprising:

• a servo motor assembly, a primary work roller screw pair assembly, a secondary work roller screw pair assembly, a lead screw roll limiting electromagnetic clutch assembly, a nut roll limiting electromagnetic clutch assembly and an external connection assembly,
• wherein the servo motor assembly is mounted coaxially with the primary work roller screw pair assembly;
• a solid long shaft lead screw of the secondary work roller screw pair assembly has a first end secured to an interior of the external connection assembly, and a second end matingly connected to a hollow long shaft lead screw of the primary work roller screw pair assembly;
• the lead screw roll limiting electromagnet clutch assembly is provided at a power output end of the primary work roller screw pair assembly, and the nut roll limiting electromagnetic clutch assembly is provided on the secondary work roller screw pair assembly;
• in a normal operation, the lead screw roll limiting electromagnetic clutch assembly is in a constrained state, the nut roll limiting electromagnetic clutch assembly provides no power to the secondary work roller screw pair assembly, the servo motor assembly drives the primary work roller screw pair assembly, and under the constraint of the lead screw roll limiting electromagnetic clutch assembly, the primary work roller screw pair assembly outputs an axial reciprocating movement;
• and
• when the primary work roller screw pair assembly experiences a mechanical transmission failure, a fault self-recovery mode is entered, the lead screw roll limiting electromagnetic clutch assembly and the nut roll limiting electromagnetic clutch assembly are activated simultaneously, such that the servo motor assembly drives the primary work roller screw pair assembly and the secondary work roller screw pair assembly to rotate together, the primary work roller screw pair assembly becomes a static load-bearing connection, and the secondary work roller screw pair assembly realize conversion of rotation to linear output to the external connection assembly.