A variable stroke electromechanical actuator

Abstract

The invention belongs to the technical field of electromechanical servo actuation, and particularly relates to a variable-stroke electromechanical actuator which is compact in structure, high in control accuracy and variable in stroke. The variable-stroke electromechanical actuator comprises a rack unit, a drive unit, a variable stoke unit and an output unit, wherein the drive unit is fixed on the rack unit through a fastener; the drive unit is connected with a speed reducer output shaft of the variable stoke unit through a key; the other end of the speed reducer output shaft passes through a fixed screw adjusting part and is connected with the output unit to achieve drive control; and an adjusting ring of the variable stroke unit is connected with the output unit through a connecting rod and is used for adjusting an output stoke. By a servo motor-driven variable-stroke structure, variable-amplitude and variable-frequency high-speed reciprocating force or displacement output can be achieved; the variable-stroke electromechanical actuator is compact in structure, high in reliability and relatively low in cost, is suitable for multiple fields of aerospace, mechanical industry and the like, is easy to popularize and apply, and has relatively great practical value.

Description

technical field [0001] The invention belongs to the technical field of electromechanical servo actuation, and in particular relates to a variable stroke electromechanical actuator with compact structure, high control precision and variable stroke. Background technique [0002] The power-by-wire actuator is an actuation system that transmits power through electric power, which is widely used in aerospace, machinery industry and other fields. Typical power fly-by-wire actuators include electrohydrostatic actuators (EHA) and electromechanical actuators (EMA). The electric hydrostatic actuator system needs to use hydraulic components to realize the output of the motor, the response speed and accuracy are poor, and the system is relatively complicated. Electromechanical actuators do not require hydraulic components and have the advantages of high efficiency, light weight, and easy maintenance, and have become the development direction of power-by-wire actuators. [0003] Most o...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-cost, compact structure, high-reliability actuator in order to overcome the shortcomings of existing electromechanical actuators such as high cost, complex structure, poor reliability, poor redundancy and unsuitable for high-speed and high-frequency actuation. , high rigidity, and a variable stroke electromechanical actuator that can meet the high-speed and high-frequency actuation environment

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