Coil winding device and coil winding method

Abstract

The present invention provides a coil winding device and a coil winding method, the coil winding device can easily change and adjust number of turns of a first coil and a second coil which are connected by an inner side connection wire, and can prevent change of tension of a wire rod which is exported when the coil is formed. The coil winding device comprises: a wire rod exporting device (50) used for exporting the wire rod (11) with a constant tension; a wire storing reel (70) used for winding the wire rod exported from the wire rod exporting device; a winding clamp (21) used for rotatably winding the wire rod exported from the wire rod exporting device or the wire rod exported by loosening of the wire storing reel; a connection mechanism (71) used for fixing the wire storing reel (70) to the winding clamp (21) and enabling the wire storing reel to rotate with the winding clamp when the winding clamp winds the wire rod exported from the wire rod exporting device (50); and a tension applying device (91) used for making the wire storing reel move relative to the winding clamp, so as to apply the constant tension to the wire rod exported from the wire storing reel (70). Preferredly, a fluid cylinder (92) is utilized to move the wire storing reel (70) towards a direction departing from the winding clamp (21).

Description

technical field [0001] The present invention relates to a coil winding device and a coil winding method in which a winding start end and a winding end can be wired on the same winding layer. Background technique [0002] In the past, coils composed of so-called α coils (or "outer coils") are often used as coils to cope with the miniaturization of motors. Useless gaps are formed between them, and the winding start and winding end of the wire are wired in the same winding layer. As the α-winding coil, a double-row helical coil is known. The double-row helical coil has first and second coils in which a wire is wound helically, and inner peripheral ends of the first and second coils. The inner connecting lines connecting the parts to each other. Furthermore, as a manufacturing device of such a double-row helical coil, the following device is proposed, which device includes: first and second winding wheels, and the first and second winding wheels are opposed to each other with ...

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned coil manufacturing apparatus of Patent Document 1, since the first and second winding wheels are rotated in opposite directions independently of the winding core, it is suitable for manufacturing both the first and second coils. Double row helical coils with the same number, but it is difficult to manufacture a coil whose number of turns of the first coil is different from that of the second coil

That is, for example, there is a disadvantage that the first coil is multi-layered in the axial direction of the winding core to greatly increase the number of turns, but on the other hand, the second coil cannot be made into a single-layer spiral coil, so it is possible to manufacture The coil is limited to a double-row spiral coil formed by connecting the first and second coils with the same number of turns through the inner connecting wire

[0007] In addition, in the coil manufacturing apparatus of the above-mentioned Patent Document 1, a constant tension is applied by a back tensioner when the wire storage drum is reversed to draw out the wire rod, but when the wire rod accumulated on the wire storage drum is When unwinding and leading out from the wire storage drum, the outer diameter of the wound wire rod gradually decreases

The back tensioner is a component that imparts a constant torque to the wire storage reel, but when the torque of the wire storage reel is constant, if the wire is drawn out, the outer diameter of the wound wire will decrease. If it is small, there is a defect that the tension applied to the wire rod derived from the outer periphery gradually increases and the tension fluctuates.

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