Expansion shaft
The invention relates to an expansion shaft which is used for supporting and fixing a paper element core, and comprises an outer shaft sleeve, a plurality of cover plates and a telescopic mechanism, wherein the outer shaft sleeve is provided with a shaft sleeve surface and an inner shaft hole, the a...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention relates to an expansion shaft which is used for supporting and fixing a paper element core, and comprises an outer shaft sleeve, a plurality of cover plates and a telescopic mechanism, wherein the outer shaft sleeve is provided with a shaft sleeve surface and an inner shaft hole, the axial shaft sleeve surface is respectively provided with a first penetrating part and a second penetrating part, and the first penetrating part and the second penetrating part are respectively provided with a plurality of penetrating holes. The cover plates are arranged on the penetrating holes respectively. The telescopic mechanism is arranged in the inner shaft hole between the first penetrating part and the second penetrating part in a floating way so as to realize the fixed arrangement of each cover plate; when the telescopic mechanism stretches, each cover plate is pushed outwards radially from the axle center, so that all the cover plates protrude out of the surface of the shaft sleeve; and when the telescopic |
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