Small-size speed reducer assembly for solar sailboard driving mechanism

Abstract

The invention discloses a small-size speed reducer assembly for a solar sailboard driving mechanism, which comprises a stepping motor (1), a harmonic gear (2), a small gear (3) and a large gear (4), wherein an output shaft of the stepping motor (1) is connected with an input shaft of the harmonic gear (2); the output end of the harmonic gear (2) is connected with the small gear (3) which is meshed with the large gear (4); and the large gear (4) and an output shaft of the solar sailboard driving mechanism are coaxially installed. The speed reducer assembly has simple and reliable composition and can realize large speed reduction ration, large-torque output and light weight of the solar sailboard driving mechanism. Meanwhile, the stepping motor (1), the harmonic gear (2) and the large gear (4) are in biased arrangement, a valuable space nearby a rotary axis is saved so that the structural layout and design of the solar sailboard driving mechanism are greatly simplified, and therefore, the solar sailboard driving mechanism has is flexible in use and has strong adaptation.

Description

technical field [0001] The invention belongs to the technical field of spacecraft control and structure, and in particular relates to a small speed reducer assembly for a satellite solar sail panel driving mechanism. Background technique [0002] The solar panel drive mechanism is an essential part of a long-life three-axis stable satellite. Its main function is to support and drive the solar array to orient itself toward the sun, and transmit the energy and electrical signals obtained by the solar array to the star. Since it cannot be backed up, the solar panel drive mechanism is one of the few single-point sources of failure on the star. Once it fails, it will directly cause the entire star to lose all energy and fail. The driving function of the solar panel driving mechanism is realized by the motor and the reducer. [0003] Due to the needs of satellite energy and orbit design, the moment of inertia of the solar wing is getting larger and larger, and the demand for the ...

AI Technical Summary

Problems solved by technology

The main disadvantage of spur gear drive is that the reduction ratio of each stage is small, there are many rotating links, and the volume is large. The maximum driving torque of the drive assembly of the existing spur gear reduction does not exceed 6Nm

Although the harmonic gear has a large torque, it is heavy and has a complicated structure and layout. Its main disadvantage is that the gears are distributed on the rotation axis of the drive mechanism, which occupies valuable space on the central axis, making the structure and layout of the drive mechanism difficult.

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