An all-electric linear actuator with high power-to-weight ratio integrated and large load

Abstract

The invention is an all-electric linear actuating device with high power-to-weight ratio integration and large load, including: an intermediate cavity, a threaded roller, an inner cavity, a planetary wheel, a stator sleeve, a screw transmission component, an output screw, etc. . The motor stator and permanent magnet are installed on the outside of the stator sleeve and the inside of the sun gear respectively, and the motor stator and permanent magnet form an integrated permanent magnet synchronous motor; the outer ring gear processed on the outside of the planetary gear and the sun gear, and the inner teeth processed on the inside of the inner cavity The ring forms a planetary gear reducer; the multi-segment annular raceway of the middle cavity and the inner cavity meshes with the threaded roller zero-lead thread to form a high-load integrated bearing; the large nut, the output screw, and the screw transmission assembly form a planetary roller The screw pair, the output screw converts the rotary motion of the large nut into a linear motion to drive the load; a variety of sensors are integrated inside the device; this invention solves the problem of large volume and weight of the existing linear actuator, and improves the performance of the electric motor. The integration degree, power-to-weight ratio and load capacity of the actuator.

Description

technical field [0001] The invention relates to an all-electric linear actuating device, in particular to an all-electric linear actuating device with high power-to-weight ratio integration and large load, and belongs to the technical fields of aerospace and marine machinery, electronics and control technology, and electromechanical servo technology. Background technique [0002] In recent years, the power transmission system has become a research hotspot in the fields of aviation, aerospace, navigation, nuclear energy and industry. It completes the power transmission between the secondary energy system and the actuator through the conversion and transmission of electric energy, and Driving the end load movement has the advantages of green energy, high safety, high efficiency and easy maintenance compared with traditional hydraulic transmission. [0003] The power-by-wire actuation system is divided into an all-electric actuation system and an electrohydrostatic actuation sy...

AI Technical Summary

Problems solved by technology

The structural forms of existing linear actuators have disadvantages such as low integration, low power density, low carrying capacity, and large volume.

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