Compact variable reduction ratio electromechanical actuator suitable for various working conditions

Abstract

The invention discloses a compact variable reduction ratio electromechanical actuator suitable for various working conditions, and relates to the technical field of electromechanical servo. The actuator comprises a front supporting lug assembly, a rear supporting lug assembly, a servo motor, a brake assembly, a variable reduction ratio speed reducer, a pushing device, a ball screw pair and a rearsupporting lug assembly. The rear supporting lug assembly and the front supporting lug assembly are fixedly installed at the two axial ends of the actuator shell correspondingly. The top end of the variable reduction ratio speed reducer extends out of the actuator shell; an output shaft of the servo motor is in butt joint with the variable reduction ratio speed reducer through the brake assembly.The pushing device is in butt joint with one side of the variable reduction ratio speed reducer; the ball screw pair is horizontally arranged; one axial end of the ball screw pair is fixedly connectedwith the front support lug assembly, and the other axial end of the ball screw pair is in butt joint with the other side of the variable reduction ratio speed reducer. The actuator is compact in structure and has the characteristic of variable reduction ratio; the reduction ratio can be adjusted as required in the working process, and the reduction ratio is increased during low-speed high-torqueoutput; and the reduction ratio is reduced during high-speed low-torque output.

Description

technical field [0001] The invention relates to the technical field of electromechanical servo, in particular to a compact variable reduction ratio electromechanical actuator applicable to various working conditions. Background technique [0002] As an important executive device of the servo system, the electromechanical actuator is used to convert the control command signal output by the system into a torque displacement signal, etc. It is mainly composed of a servo motor, transmission components, sensors, etc., and front and rear connection components. [0003] Common output forms of electromechanical actuators mainly include two types, one is linear, that is, output thrust and displacement; the other is rotary, that is, output torque and rotation angle. The transmission part of the linear electromechanical actuator adopts a ball screw pair or a planetary roller screw pair, and its lead is selected at the beginning of the design. For the triangle relationship formed by the...

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Problems solved by technology

The transmission part of the linear electromechanical actuator adopts a ball screw pair or a planetary roller screw pair, and its lead is selected at the beginning of the design. For the triangle relationship formed by the electromechanical actuator and the installation rocker arm, when After the screw lead and the size of the rocker arm are determined, the reduction ratio of the system cannot be further changed

[0004] When the load condition changes in a large range, the layout scheme of the transmission electromechanical actuator cannot adaptively change the system reduction ratio, thereby changing the output torque and output angle, and cannot be applied in more and more complex ranges, especially for deformation , folding the wings of the aircraft, etc., greatly reducing the scope of application of electromechanical actuators

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