Dual drive universal joint

Abstract

The invention discloses a dual-drive universal joint knuckle. The dual-drive universal joint knuckle comprises a joint holder, a first arched beam, a second arched beam and four drive motors. The first arched beam and the second arched beam are both connected to corresponding output shafts through transmission assemblies. Each transmission assembly comprises a driving block, a transmission block and a driven ring. The driving blocks are fixed to the corresponding output shafts and can rotate synchronously with the output shafts. The driven rings are coaxially arranged outside the output shaftsin a sleeving mode and are further connected with the ends of the arched beams. One ends of the transmission blocks are fixedly connected to the corresponding driving blocks, and the other ends of the transmission blocks are connected to the corresponding driven rings so as to drive the driven rings to rotate coaxially when the output shafts rotate. Moreover, the transmission blocks are made of electrostriction materials and thus can generate telescopic deformation displacement when being powered up so as to drive the driven rings to rotate. According to the dual-drive universal joint knuckle, fine-adjusting operations can be executed when pose errors happen to the arched beams so that the errors can be eliminated, positional accuracy of mechanical arms is improved, and the effect that the aircraft panel drill-rivet accuracy requirement and other accuracy requirements are met can be guaranteed.

Description

technical field [0001] The invention relates to a universal joint, in particular to a dual-drive universal joint. Background technique [0002] With the proposal of "Made in China 2025", all walks of life have put forward new and higher requirements for the precision of robots. Robots are indispensable in both traditional manufacturing and modern factories, but the positioning accuracy of robots is still a technical difficulty to be overcome. In 2017, China's first large aircraft, C919, was successfully tested and received orders from all over the world. This not only shows the rapid development of my country's manufacturing industry, but also shows that we urgently need more complete equipment and technical support. In the process of manufacturing aircraft, aircraft assembly is the main link, and its labor volume accounts for 40% to 50% of the total amount of aircraft manufacturing. According to statistics, 70% of aircraft body fatigue failure accidents are caused by the ...

AI Technical Summary

Problems solved by technology

Among them, the universal joint includes a joint seat, a first arch beam, a second arch beam and four drive motors, and the four drive motors are connected to the joint seat in the form of a "ten", and the output shafts of each drive motor are located at a position far away from the joint seat. One end of the joint seat, the two ends of the first arch beam are respectively connected to the output shafts of two coaxially arranged drive motors, and the two ends of the second arch beam are respectively connected to the output shafts of the other two coaxially arranged drive motors. Axis; since the first arch beam and the second arch beam are directly driven by the drive motor to rotate, and it is difficult for the drive motor to perform fine-tuning operations through micro-displacement pairs when the pose error of the arch beam occurs, the positioning accuracy of the mechanical arm is insufficient, which in turn affects the aircraft. Drilling and riveting precision of siding

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