Winding body, winding structure, electromagnetic clutch, manufacturing method of winding body, and manufacturing method of winding structure

摘要

PROBLEM TO BE SOLVED: To provide a winding body capable of improving occupancy of winding per unit volume.SOLUTION: An electromagnetic coil is a winding body that is formed annular as a whole by laminating winding 20 of which the cross section is formed rectangular from an inner circumferential side to an outer circumferential side while winding it in a circumferential direction. In an inner circumferential part and an outer circumferential part of the winding body, a plurality of step parts 210, 211, 212, 220, 221 and 222 are provided of which the heights in a direction orthogonal with a central axis of the winding body are different for cross sections that pass the central axis. A transition part 24 is a portion of the winding 20 that connects portions of different heights in the step part 211 and extends obliquely with respect to the central axis. A transition part 25 is a portion of the winding 20 that connects portions of different heights in the step part 222 and extends obliquely with respect to the central axis. Each of the plurality of step parts 210, 211, 212, 220, 221 and 222 forms a step for one stage of the winding.SELECTED DRAWING: Figure 3