Importance

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Abstract

A single-layered hollow transmission shaft comprises a hollow shaft body. The hollow shaft body has a power-inputting end and a power-outputting end, which are formed at two opposite ends of the hollow shaft body, and at least one multi-start helix set. The multi-start helix set has a left-coiling multi-start helix section and a right-coiling multi-start helix section, which are arranged axially and have an equal pitch, number of circles, number of starts of helix and width of helix. By a single-layered structure and a structural design of the multi-start helix set, the single-layered hollow transmission shaft provides sufficient space for wiring of communication and can transmit power with pure torque while the shaft rotates, therefore increasing precision of torque detection, and can detect torque while rotating at high speed without installing any other external element and without affecting size of the space inside the shaft.

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First Claim