A Harmonic Driven Crank Rocker Rotary Steering Gear

Abstract

The invention discloses a harmonically driven crank rocker arm rotary steering gear, which comprises a motor (1), an output shaft, a body assembly (3), a speed reduction mechanism (2) and a rocker arm output shaft assembly (4); the speed reduction mechanism ( 2) It includes a harmonic reducer (204) and an input gear (201), an intermediate gear (202), and an output gear (203) that engage in sequence, the input gear (201) is connected to the motor (1), and the input gear (201 ), the intermediate gear (202), and the number of teeth of the output gear (203) increase sequentially to form a first-stage deceleration unit, and the harmonic reducer (204) is connected to the output gear (203) to form a second-stage deceleration unit; the rocker arm output shaft assembly (4) comprising a rocker arm output shaft (402), the rocker arm output shaft (402) is a crank-shaped rocker arm structure, one end of which is connected with the reduction mechanism (2), and the other end is connected with the output shaft. The harmonic drive crank rocker arm rotary steering gear of the present invention has the characteristics of small volume, light weight, high transmission precision and large output torque.

Description

technical field [0001] The invention belongs to the technical field of rotary steering gears, and more particularly relates to a harmonically driven crank-rocker arm rotary steering gear. Background technique [0002] In recent years, with the continuous progress of basic industrial level and modern technology, the servo system is developing towards the design direction of miniaturization, long life, high efficiency and maintenance-free. Research on technologies such as unmanned aerial vehicles and cruise-guided missiles in my country has become one of the current hotspots. Due to the small size of UAVs and cruise-guided missiles, the utilization of internal space is extremely high, which increases the difficulty of designing and developing the steering gear required for adjusting their spatial attitude or engine control. The harmonic drive crank rocker arm rotary steering gear came into being. Compared with the traditional electric steering gear, it greatly reduces the vol...

AI Technical Summary

Problems solved by technology

The traditional electric steering gear is limited by the transmission mode, and it is difficult to output a large torque in a small space

There are two commonly used methods in the prior art. One is to increase the output torque by adopting multi-stage gear transmission, which will increase the system error due to too many transmission links, thus affecting the accuracy of the steering gear.

The second is to adopt the method of increasing the reduction ratio of a certain link, which requires a large installation space and increases the quality of the steering gear, which restricts the miniaturization of equipment such as unmanned aerial vehicles and cruise guidance missiles.

The airborne small-volume and high-torque composite steering gear needs to greatly reduce the volume and mass of the steering gear on the basis of the traditional steering gear, and achieve high torque output, but the existing technology does not meet the needs of small size, light weight and large size. Composite servo structure with torque output

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