A mechanical expansion shaft

Abstract

The invention discloses a mechanical expanding shaft, which is characterized by comprising an axial pushing connection device, an expanding shaft, an inner spline connecting sleeve, an expanding shaft outer sleeve, an expanding shaft inner sleeve, expanding jaw sleeves, a shaft end positioning piece and a shaft end, wherein the expanding shaft is divided into a spline portion and an expanding portion along the axial direction, 3-8 same expanding jaws are uniformly arranged on a circular truncated cone which is arranged around the end portion of the expanding portion of the expanding shaft, the inner spine connecting sleeve is sleeved on the outer surface of the spline portion, the inner spine connecting sleeve and the outer surface of the spline portion are bitten, a transmission device is fixedly connected on the outer surface of a thin segment of the expanding shaft outer sleeve, and is used to drive the whole mechanical expanding shaft to rotate, gaps which are used to be provided with the expanding shaft inner sleeve are arranged on the outer sides of a thick segment of the expanding shaft outer sleeve and the expanding portion of the expanding shaft, the expanding shaft and the expanding shaft outer sleeve can slide in the axial direction, the expanding jaw sleeves are sleeved outside the expanding jaws, and the expanding jaws are connected by adopting elastic connecting pieces. The elastic connecting pieces are used to enable the expanding jaws to recover and return after the expanding shaft returns back, and the two edges of the two end portions of the expanding jaw sleeves are respectively fixedly connected with the edges of opening end portions and the shaft ends of the expanding shaft inner sleeve.

Description

technical field [0001] The invention relates to an expansion shaft, in particular to a mechanical expansion shaft capable of automatically extending and rotating in the axial direction at the same time. Background technique [0002] At present, expansion shafts are installed for the winding and unwinding of flexible substrates in industries such as coating, slitting, printing, rewinding, compounding, papermaking, and plastics. It is characterized by convenient loading and unloading and high production efficiency. For example, in the application of winding and unwinding of the slitting machine: the winding is to curl the slit aluminum foil (tape) on the sleeve, and put the sleeve on the winding shaft before winding. The barrel and the take-up shaft rotate at the same time, so no relative movement can occur. After the end of the take-up, the sleeve can be easily disassembled from the take-up shaft; in addition, in the industrial packaging production line, sometimes it is nece...

AI Technical Summary

Problems solved by technology

Although this mechanical expansion shaft can achieve high-precision, high-coaxial expansion function for sleeves of any length and different inner diameters, this mechanical expansion shaft can only satisfy the rotation around the axial direction, and cannot automatically extend into the sleeve that needs to be tightened. In the sleeve, it cannot meet the requirements of automation

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