An integrated electric cylinder based on reverse planetary roller screw

Abstract

The invention relates to an integrated electric cylinder based on a reverse type planetary roller screw, belongs to the technical field of electric cylinders for aerospace, and solves the problem that the existing electric cylinder cannot realize high-precision position closed-loop control and has no fault tolerance function of a servo motor. And it is necessary to limit the rotation of the push rod by the load. The integrated electric cylinder of the present invention is composed of a cylinder block, a bearing, a stator winding, a rotor permanent magnet, a nut sleeve, a roller screw, an encoder, an encoder mounting frame, an encoder mounting shaft and a magnetostrictive displacement sensor; the cylinder The body includes a casing, an end cover and a guide sleeve, and the end cover and the guide sleeve are respectively arranged at both ends of the casing; the bearing is sleeved in the casing, and the nut sleeve is sleeved in the bearing; the nut sleeve is connected with the roller screw ; The casing is connected with the stator winding, and the rotor permanent magnet is arranged on the outer surface of the nut sleeve. The present invention can realize high-precision position closed-loop control, the stator windings are mutually redundant, and there is no need to increase the push rod to limit the rotation of the lead screw.

Description

technical field [0001] The invention relates to the technical field of aerospace electric cylinders, in particular to an integrated electric cylinder based on a reverse planetary roller screw. Background technique [0002] Aerospace technology is a high-tech cutting-edge technology. Among them, aerospace equipment such as missile launch vehicles, launch turrets, and drones require electric cylinders to be suitable for low load, high speed, small stroke, and high power. Where the density is required, the electric cylinder needs to have high control accuracy and be able to ensure the continuous and effective operation of the equipment. [0003] The electric cylinder is a device that converts electrical energy into mechanical energy. It is a modular product that integrates the functions of the servo motor and the lead screw. It converts the rotational motion of the servo motor into the linear motion of the nut and outputs thrust. As an actuator, the electric cylinder usually c...

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide an integrated electric cylinder based on a reverse planetary roller screw for aerospace equipment, to solve the problem that the existing electric cylinder cannot achieve high-precision position closed-loop control, There is no fault tolerance function of the servo motor, and the problem that the push rod rotation needs to be limited by the load

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