Self-contained mechanical actuator

Abstract

Abstract A SELF-CONTAINED MECHANICAL ACTUATOR OF THE JACKSCREWTYPE THAT INCLUDES A DRIVE MOTOR SECURED TO A HOUSING WITH A DRIVE SHAFT PROJECTING FROM THE MOTOR INTO THE HOUSING FOR DRIVING A HIGH-EFFICIENCY SKEW-AXIS, SCREW-TYPE GEAR SET TO WHICH IS CONNECTED A SCREW MEMBER HAVING A DOUBLE HELIX SCREW THREAD FORMED AT A HIGH HELIX ANGLE FOR HIGH-EFFICIENCY MANIPULATION OF A LOAD-ATTACHED TRAVELLING NUT MEMBER. THE GEAR SET INCLUDES A PINION SHAFT CARRYING A PINION THAT HAS WORN-LIKE SCREW TEETH, AND A GEAR WITH TEETH FORMED ON A GENERALLY RADIAL FACE FOR MULTIPLE TOOTH, FACE-MESHING ENGAGING WITH THE PINION TEETH. THE PINION SHAFT IS COAXIALLY ALIGNED WITH THE DRIVE SHAFT ALONG AN AXIS COMPACTLY DISPOSED PROXIMATE THE ROTATIONAL AXIS OF THE GEAR AND SCREW MEMBER. A SELF-LOCKING TRANSMISSION MECHANISM DRIVINGLY INTERCONNECTS THE DRIVE SHAFT AND THE GEAR SET POINT SHAFT FOR SUBSTANTIALLY DRAG-FREE TRANSMISSION OF ROTATION TO THE GEAR SET AND CONNECTED SCREW MEMBER WHILE SUBSTANTIALLY PREVENTING ANY OVERRIDING, REVERSING OR RUNDOWN ROTATION INDEPENDENT OF THE ROTATION OF THE DRIVE SHAFT BY THE MOTOR. THE PINION SHAFT AND THE SCREW MEMBER ARE SUPPORTED IN RADIAL BALL BEARINGS FOR ROTATION AND FOR TRANSMITTING AXIAL TRUST TO THE HOUSING. ENDS OF THE PINION SHAFT AND SCREW MEMBER ARE RADIALLY JOURNALED IN THE HOUSING TO FORM RADIAL THRUST TRANSMITTING BEARING COUPLES IN COOPERATION WITH THE RESPECTIVE RADIAL BALL BEARINGS.

Inventors

• 👤 Anthony G Profet

Bibliographic Details