Dragging unfolding type high-rigidity stretching arm with high spatial folding-unfolding ratio

Abstract

A dragging unfolding type high-rigidity stretching arm with high spatial folding-unfolding ratio comprises a folding and unfolding unit set, an axial force bearing cable, unfolding jet engines and an end face force bearing plate. The two unfolding jet engines are fixed to the two end face force bearing plates respectively, a foldable unit set is arranged between the two end face force bearing plates, the foldable unit set comprises N foldable units hinged in series, and the two foldable units on the outermost side are fixedly connected with the two end face force bearing plates respectively. Each foldable unit is a triangular prism after being unfolded, a telescopic rod is hinged to the opposite angle of each side face of the triangular prism, the telescopic rods stretch out along with unfolding of the foldable units and retract along with folding, and the three axial force bearing cables stretch across the corresponding side faces of the N foldable units respectively and are limited in the radial direction. The two ends of each axial force bearing cable are fixed to the two end face force bearing plates respectively. According to the stretching arm, the rigidity and the tensile capacity are improved, and the dragging and unfolding driving mode is high in efficiency and can adapt to unfolding of the large-scale stretching arm.

Description

technical field [0001] The invention relates to the field of deployable mechanisms in aerospace, in particular to a high-rigidity stretching arm with a high folding ratio in space and a drag-and-drag deployment type. Background technique [0002] The space extension arm is the main load-bearing structure used in the space field. With the rapid development of the aerospace industry, the demand for the linear extension arm reaches tens of meters or even hundreds of meters. Due to the limitation of the carrying space of the space vehicle, the extension arm is in a folded state during the launch phase, and will start working after entering the predetermined orbit. [0003] At present, the articulated extension arm is mainly used as a static support structure, and its stiffness is generally poor. With the complexity of aerospace missions, the extension arm will face complex working conditions of large bending moment and high tension. Therefore need badly a kind of high rigidity...

AI Technical Summary

Problems solved by technology

[0004] At the same time, most of the extension methods of the extension arm are driven by motors or relying on elastic elements to release elastic potential energy. increase, unable to adapt to the deployment of large-scale extension arms, so a new driving method with high efficiency, short force transmission path, and small mass and volume is urgently needed

Images