| 摘要 |
A quick coupling arrangement installed in a telescopic shaft between an upper shaft section, including a bushing fixedly fastened to the bottom end of the upper shaft section, a tapered, threaded connector fixedly fastened to the top end of the lower shaft section, and a split, peripherally embossed screw cap threaded onto the threaded connector and rotated relative to the connector between a first position where the screw cap is radially expanded and forced into engagement with the inside wall of the upper shaft section to stop the lower shaft section from axial movement relative to the upper shaft section, and a second position where the screw cap is released from the inside wall of the upper shaft section for enabling the lower shaft section and the upper shaft section to be moved axially relative to each other.
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