Single-Action-Lock Structural Space Joint

The SSS-Joint is an interlocking joint system for joining structure components such as struts, flat truss frames, and volumetric truss bays together to build bigger and more complex structure systems. The SSS-Joint interface can be applied to various connection scenarios commonly found in truss structure assembly, including but not limited to strut-to-strut connections, strut-to-node connections, and half-node-to-half-node connections. By incorporating half-node joints, the number of standalone components can be reduced by over 52%, and assembly steps can be decreased by over 65% compared to traditional truss tessellations without half-nodes. In the current design, a single screwdriver can assemble all connections. The interlocking geometry of the SSS-joint features built-in guiding elements to aid the alignment process. Once in place, the screwdriver can rotate and engage with the spring-loaded captive lock-screw on the joint. The screwdriver tip does not need to be perfectly aligned, as the spring-loaded lock-screw will automatically pop into place within half a rotation after contact. This design dramatically reduces the complexity of the assembly process and eliminates the need for loose fasteners or specialized tools. The SSS-joint offers a robust, lightweight, and scalable solution for modular structural assembly in space and terrestrial applications alike. The SSS-Joint has reached Technology Readiness Level (TRL) 5 (validated in a relevant environment) and is available for patent licensing. On Earth, most joining systems are effective in human centric environments with virtually unlimited joining supplies. As an assembly agent, a human possesses two 27 degree-of-freedom (DOF) hands, each attached to a 7 DOF arm, all mobilized by an adaptive human body. Humans can complete complex assembly tasks that may be hindered by physical obstructions. However, robotic systems remain the preferred workforce for future in-space assembly missions, offering lower cost, reduced risk, and minimized operational overhead. In-space structure assembly is still constrained by the finite availability of joining supplies and the limited dexterity of robotic manipulators Innovators at NASA's Langley Research Center have developed a novel Single-Action-Lock Structural Space (SSS) Joint designed for use in robotic assembly or humans in spacesuits with limited range of movement. This joint system addresses the critical need for simplified, reliable, and tool-minimal connections in environments where dexterity is constrained and every component must be optimized for mass, volume, and operational efficiency.