JPS6036704B2 - Manufacturing method of flat motor rotor coil - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a rotor coil for a flat motor.

Conventionally, in the manufacturing method of the rotor coil of this type of flat motor, as shown in FIG.
is unwound by applying an appropriate tension, and the wire 2 is wound around the flat winding core 4 of the winding frame 3 by a predetermined number of turns from the inside in the radial direction of the winding core 4 to the outside.

The coil 6 formed in this way as shown in FIG. 4 usually has a large amount of voids between the wires and a space factor of 80% or less.
If applied to a flat motor, a large gap must be provided between the yoke and the magnet in the stator magnetic path, resulting in a decrease in magnetic flux density due to a decrease in permeance, making it extremely inefficient. I couldn't do it. Therefore, in order to improve the space factor of the coil 6,
After winding, the coil 5 is compressed by applying pressure in the thickness direction of the coil 5 so that the wire cross section changes from a circular shape to a rectangular shape. However, in this case, the winding start end 6a of the coil 6 must be pulled out from the inside in the radial direction to the outside, and when compressed, the winding start end 6a becomes flush with other wire parts even in the portion where it overlaps with other wires. From, winding start end 6a
In addition, the portion overlapping the winding start end 6a will be excessively compressed.

As a result, the thickness of the strands in these portions was significantly reduced, making them prone to breakage, and the wire coating peeled off, posing the danger of layer shorts. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a rotor coil for a flat motor, which eliminates the above-mentioned drawbacks, suppresses breakage, prevents short-circuiting, and improves the coverage ratio during operation.

The present invention will be explained below along with the drawings.

5 to 8 show an embodiment of the present invention. In this embodiment, a coil is divided into an even number of m pieces to form coil divisions, thereby forming an upper coil.

In this case, a winding frame 12 is provided which has at least a fan-shaped winding part when viewed from the bobbin 11 and the end face and can be divided into two parts. The strand 13 is placed in the frame 12 with a strand length corresponding to L/m.
/m turns. In addition, during this winding, each turn or every two turns is preferably impregnated with a solvent having an adhesive function such as acetone and pressurized, so that the cross section of the wire 13 is sufficiently transformed from a circular shape to a rectangular shape each time. Next, the winding frame 12 is pulled in all axial directions to divide it, and the coil divided bodies 14' as shown in FIG. Then, the winding start ends 14'' of the adjacent coil split bodies 14' or the ends 14 of the adjacent coil segments 14' are connected by spot welding or soldering so that the direction of current flows in the same direction as a whole, and all the coils are As shown in FIG. 8, the divided bodies 14' are preferably integrated together with an adhesive by applying a suitable pressure to complete the coil 14 having a total length of L and a winding of N. Therefore, winding is started as in the conventional manner. Since there is no need to pull out the ends from the inside in the radial direction to the outside, there is no part of the coil 14 that is compressed excessively, and both the inner and outer layers of the coil 14 are compressed extremely uniformly. The figure shows another embodiment of the present invention, in which a plurality of sets of bobbins 21, 21a are provided, and the total length of the strands required to form a coil corresponding to one pole is L, When the number of turns is N, a wire 23 of approximately L/2 is passed from one bobbin to the other bobbin in advance.
is being rolled up.

Further, a fan-shaped winding frame 22 is provided with at least a winding portion extending from the end face, and the winding frame 22 has end flanges 22a, 22.
In addition, intermediate flanges 22c, 22d, 22e are provided together with the intermediate flanges 22c, 22d, and grooves 22f, 22g through which the millet wire 23 can be inserted are provided in the intermediate flanges 22c, 22d. However, as shown in FIG.
2g through the center of the strand 23, and with the winding frame 22 fixed, pass it through a suitable wire inductor to the adjacent winding parts 22h,
22i, 22j, and 22k are wound with wire wires 23 in opposite directions, for example, in four rows, L/4 in the illustrated embodiment, as shown in FIG.

In addition, during this winding, the wire 23 is preferably impregnated with a solvent having an adhesive function such as acetone and pressurized every two turns, so that the cross section of the strand 23 is sufficiently transformed from a circular shape to a rectangular shape each time. After that, in the state shown in FIG. 10, for example, the end flange 22a integral with the winding parts 22h and 22i and the end flange 22b integral with the winding parts 22i and 22k, which are provided so as to be able to be attached to each other, are mutually axially aligned. Intermediate flanges 22c, 22 that can be removed by pulling in opposite directions and can be divided into two
d and 22e are pulled radially outward in opposite directions to remove them, and the two coil segments are taken out. In this case, since the portion 24' of the wire 23 inserted through the grooves 22f and 22g is the winding start end, the direction of current is in a constant direction throughout the ends 24^ of the two coil segments as shown in FIG. The coil 2 is connected by spot or soldering so that the coil 2 is integrated with adhesive, etc.
Complete 4. In this embodiment as well, there is no need to pull out the winding start end from the inside in the radial direction to the outside as in the case of the secondary coil, so there is no part of the coil 24 that is compressed by temperature, and both the inner and outer layers of the coil 24 are compressed extremely uniformly. will be done.
Since the coils 14 and 24 configured as described above each form a fan shape, they are arranged in a circular shape as a whole depending on the number of poles of the motor, as shown in FIGS. 12 to 16, for example, a delta shape. The rotor 33 is connected to the commutator 31 through which the rotary shaft 30 is inserted and is connected with the resin 32.

The rotor 33 has its rotating shaft 30 supported by a bearing 38 held by a retaining yoke 34 via a bearing stand 35, and a magnet 38 is disposed within the yokes 34 and 37, and a terminal 39 A flat motor is completed by having four brush plates connected to each other and holding a brush 41 so as to be able to come into contact with the commutator 31. According to the method of manufacturing a rotor coil for a flat motor of the present invention as described above, since the starting end of the coil winding is not pulled out radially inward, the pressing force can be extremely large, and there is no possibility of breakage. In addition, it is possible to improve the occupancy rate without causing a rare short.

In addition, since the millet wire is wound with sufficient compression on the inside in the radial direction, remarkable effects such as a significant increase in space factor both inside and outside the coil can be achieved.

[Brief explanation of the drawing]

1 to 4 are explanatory diagrams of a conventional method for manufacturing a rotor coil for a flat motor, and FIGS. 5 to 8 are explanatory diagrams for an embodiment of a method for manufacturing a rotor coil for a flat motor according to the present invention. , FIG. 9 to FIG. 11 are explanatory diagrams of other embodiments of the present invention, FIG. 12 is a partial plan view of a flat motor to which the present invention is applied, FIG. 13 is a partial side view of the same, and FIG. 14 is a partial plan view of the same. FIG. 15 is a partial perspective view, FIG. 15 is an explanatory view of the same, and FIG. 16 is a side view showing a cross section of the same half. 1...Bobbin, 12...Reel frame, 13...
...Elementary wire, 14...Coil, 14'...Coil division, I4''...Winding start end, 14 River...
terminal. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16

Claims (1)

[Claims] 1. A coil corresponding to one pole is divided into an even number of coils and wound in a ring shape to form several coil segments having approximately the same shape. These multiple coil segments are overlapped concentrically, and the coil is wound into an even number. The winding end ends of each of the plurality of coil division bodies are connected on the inside in the radial direction, and a pair of coil terminals are taken out on the outside in the radial direction of the coil, and the plurality of coil division bodies are press-formed from both sides in the axial direction. A method for manufacturing a rotor coil for a flat motor, characterized in that the rotor coil is integrated with the rotor coil.