| 摘要 |
An improved structure of the driving axis of a puller includes a screw bar, a driving assembly with a through hole, and a driven assembly underneath the driving assembly, with a screw hole. A plurality of connecting arms is disposed in the radial direction of the driven assembly. The screw bar penetrates downward through the driving assembly and the driven assembly with its bottom end, while its top end is provided with a rotating element for mounting a tool to rotate the screw bar. With a positioning element penetrated the rotating element into the screw bar, the rotating element is fixed on the screw bar for simultaneous rotation.
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