Air vehicle and electric steering engine capable of resisting large bending torque thereof

Abstract

The invention discloses an electric steering engine capable of resisting large bending torque. The electric steering engine capable of resisting the large bending torque comprises a harmonic speed reducer, an output shaft and a connection assembly, wherein the output shaft is fixedly connected with an output steel wheel of the harmonic speed reducer, and the connection assembly is arranged between the output shaft and a load, used for transmitting torque and fixedly connected onto an elastic body. According to the electric steering engine, the connection assembly additionally arranged between the output shaft and the load is used for transmitting the torque and fixedly connected onto the elastic body, so that the connection assembly bears the bending torque from the output shaft. By utilizing the elastic body to unload the bending torque, separation of a carrying object of the bending torque of the electric steering engine is achieved, and the output shaft is only responsible for transmitting the torque. Therefore, the electric steering engine has the advantages of being resistant to the large bending torque, high in reliability and strong in bearing capability, avoids radial displacement of the output shaft under the effect of the being torque, and meets the requirement for long service life of middle-long distance high-altitude air vehicles. The invention further discloses an air vehicle applying the electric steering engine capable of resisting the large bending torque. The air vehicle is high in reliability, long in service life and especially suitable for middle-long distance flight.

Description

technical field [0001] The invention relates to the technical field of electric steering gear, in particular to an aircraft and its electric steering gear with high bending moment resistance. Background technique [0002] The electric steering gear is the actuator of the guidance and control system of aerospace vehicles such as missiles and unmanned aerial vehicles. According to the signal output by the controller of the missile or unmanned aerial vehicle, it manipulates the wings of the missile or unmanned aerial vehicle, and relies on the missile body or unmanned aerial vehicle to fly. During the process, the aerodynamic force and aerodynamic resistance moment generated by the deflection of the wings stabilize and control the projectile, so that the projectile flies according to the set trajectory and directly hits the target. [0003] At present, most electric steering gears use harmonic reducers, and the schematic diagram is as follows: figure 1 As shown, the harmonic r...

AI Technical Summary

Problems solved by technology

[0004] With the altitude and remoteness of the aircraft, the requirements for the bending moment resistance of the electric steering gear are getting higher and higher. It is difficult for the electric steering gear of the harmonic reducer to meet the system requirements. The elastic deformation of the flexible member is used to achieve motion or power transmission. If the output mechanism bears the bending moment and the deformation exceeds the deformation of the harmonic reducer flexwheel, the electric steering gear will be stuck and cannot work normally.

[0005] The structure of the existing electric steering gear is as follows: figure 2 As shown, the output shaft 7 is fixedly connected to the output steel wheel 5 of the harmonic reducer, supported by the needle bearing 6, and the output shaft 7 will undergo radial displacement under the action of the bending moment, and the displacement exceeds the deformation of the flexible wheel 11 of the harmonic reducer. The electric steering gear will be stuck, causing the mission to fail

[0006] Therefore, how to overcome the shortcomings of the existing harmonic reducer electric steering gear with poor bending moment resistance, improve the structure, and provide an electric steering gear with high bending torque resistance, high reliability, and strong bearing capacity has become an urgent need for those skilled in the art. Important Technical Issues Solved

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