Repeatable folding and unfolding truss structure and cell element thereof

Abstract

The invention relates to a truss structure, and specifically relates to a repeatable folding and unfolding truss structure and a cell element thereof. The truss cell element of the repeatable folding and unfolding truss structure comprises three rigid frames (1), a cross rod (2), a diagonal member (3) and a locking mechanism (4). The truss cell element can form a linear beam truss cell element or a round beam truss cell element according to different geometrical parameters of the rigid frames (1), the cross rod (2), and the diagonal member (3). The truss cell elements are hinged in sequence along a length direction, to form a repeatable folding and unfolding truss. The cell elements provide continuous unfolding of truss girders in a plurality of structures, including a linear type, round and other continuous shapes, and unfolding tracks are very simple and are lines. The cell elements simplify an unfolding process and improve unfolding efficiency.

Description

technical field [0001] The invention relates to a truss structure, in particular to a repeatable expandable and retractable truss structure and its cells. Background technique [0002] In the prior art, there are three construction methods for the truss structure. One is the fixed truss structure. The truss beam is prefabricated by welding or screwing, which can be linear, semicircular or other arbitrary shapes. The fixed truss has high rigidity and strong bearing capacity, but the manufacturing process is cumbersome and transportation is inconvenient. Especially for the on-orbit construction of large platforms, due to the low cost-efficiency ratio of transportation and low space utilization, it is difficult to meet the low-cost and efficient on-orbit construction of large-scale truss platforms using existing delivery technologies, which limits my country's large-scale solar power plants, large-scale antennas, The implementation of on-orbit construction of the main load-bear...

AI Technical Summary

Problems solved by technology

At present, the representative truss fast-deploying structure includes two kinds of unfolding mechanisms, namely disc pressing rod and hinged rod, or refer to "Typical Rod Frame-type Deploying Mechanism" (Ding Feng, Shanghai Aerospace). This kind of truss structure has a large storage ratio and is mostly used for For the support structures of large SAR antennas, ground remote sensing and deep space detectors, etc., due to the complicated unfolding and retracting trajectories, special unfolding and retracting devices are required to realize the unfolding and retracting of the truss structure, and one set of devices can only be used for one set When the truss beam is deployed, the truss beam can only be linear. Since the joints mostly use spherical joints, the rigidity of the truss is maintained by the pre-tightening force of the rope after deployment, so the rigidity is low.

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