#$%^&*AU2020102389A420201105.pdf#####Ab s tr ac t o f th e Dis clo s ur e The present utility model relates to a shaftless unwinding mandrel replacement mechanism which comprises an air cylinder assembly, wherein the fixed end of the air cylinder in the air cylinder assembly is fixed on the bearing seat, the telescopic end of the air cylinder is fixed with a first inflation chuck, a 5 second inflation chuck symmetrically arranged with the first inflation chuck is further included, the end of the second inflation chuck away from the first inflation chuck is fixedly connected to the movable end of the magnetic powder brake, and the outer sleeve of the first inflation chuck and/or the second inflation chuck is fixed with a snap ring for clamping the mandrel; with the shaftless unwinding o mandrel replacement mechanism provided by the present utility model, the mandrel can be replaced without a mandrel, and the old and new base materials can be exchanged easily, which ensures the reference side of the base material, saves time, and improves work efficiency. (Fig.1)
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