Achimedean spiral disk type variable-diameter shaft

Abstract

The invention relates to an achimedean spiral disk type variable-diameter shaft, which is applied to all die cutting machines and sticking devices of adhesive tapes and diaphragms and is capable of adapting the inner diameters of diaphragm coiling blocks with different diameters in a large range. The problem that a shaft and a material roll are expanded together by rotating a hand wheel for several circles when the common variable-diameter shaft diameter greatly differs from the material roll diameter and the problem that the common variable-diameter shaft has self-locking difficulty in the reverse direction when the hand wheel is loosened are solved. The device provided by the invention adopts the type of a spiral disk with a plurality of achimedean spirals and comprises a shaft diameter adjusting knob, slide blocks, an expanding piece, an achimedean spiral disk, a drive shaft, and the like. The achimedean spiral disk drives the expanding piece to move through the slide blocks, a multipled achimedean spiral disk structure is adopted to ensure the front slide block and the rear slide block to synchronously move and make the front slide block and the rear slide block have enough rigidity, and therefore the change of the shaft diameter is realized through the location change of the expanding piece firmly connected with the slide blocks.

Description

Technical field: [0001] The invention is a mechanical variable-diameter shaft device, which is applied to various die-cutting machines, self-adhesive tapes and film lamination equipment, and can adapt to the inner diameters of film rolls with different diameters within a relatively large range. Background technique: [0002] At present, the mechanical variable diameter shaft adopts the combination of helix and inclined plane, because the pitch of the screw cannot be too large, and when the diameter of the shaft and the diameter of the material coil are quite different, the screw needs to rotate many times to make the shaft and the material roll together. , the operation is very inconvenient. At the same time, the inclination of the inclined plane should not be too large, otherwise there will be difficulties in the relative sliding of the mobile pair due to too large pressure angle, and the problem of non-self-locking in the reverse direction after the hand wheel is released....

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the inconvenient operation of the existing mechanical variable-diameter shaft, and the relative sliding of the moving pair is difficult, and the reverse direction is not easy to self-lock after the hand wheel is released, the present invention uses the Archimedes spiral disk to replace the spiral and the inclined plane Combining methods, a new type of mechanical reducing shaft is proposed

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