JPH0423493B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a stator core of a toroidal wound motor used as a drive source for a fan drive source of a room air conditioner, a kerosene heater, and other various devices. .

Conventional configuration and its problems It is a well-known fact that the height of the coil end can be significantly reduced by winding the motor stator windings around the yoke of each slot in the stator core. Generally, a toroidal winding machine is required to apply a so-called toroidal winding, which is a winding perpendicular to each yoke.

This winding machine sets a wire storage ring so as to intersect with an annular body to be wound, winds the required wire in one turn around the wire storage ring, and then reverses the wire storage ring to unwind the stored wire. The wire is wound on the object to be wound while expelling the wire, but the workability is extremely poor and the winding speed is slow, so it is not suitable for winding rotating equipment such as electric motors that require multiple windings. Not yet. Therefore, as an alternative to the toroidal winding machine, it has been proposed to divide the core, which is the body to be wound, and to wind each core into slots using a flyer type winding machine.

This method is useful because it allows toroidal winding, which has been difficult in the past, to be performed simply and at high speed, except for joining the split cores. When toroidal winding is performed on a split core, a method as shown in FIG. 1 is usually considered. That is, the teeth 2 at the split ends of the split core 1 are held by the check 3. Then, the flyer 5 is wound around the connecting point 4 of the slot _S1 , and the electric wire 6 is wound around it. A winding guide 8 is provided outside the circumferential locus of the electric wire 6 in order to prevent the electric wire 6 from coming into contact with the tooth tip 2a and breaking when it passes through the slot opening 7.

When the winding in slot S ₁ is completed and the winding is to be moved to slot S ₂ next, the iron core 1 is rotated in the direction of the arrow about its center. At this time, the tip 3a of the check 3 Since it protrudes inward from the inner diameter, it collides with the winding guide 8,
It is not possible to rotate and position the split core 1 and check 3. Normally, the winding guide 8 is removed at this point, and if the slot to be wound is the slot closest to the dividing surface, the tip of the check 3 is made large and the wire is wound in that slot by also serving as a guide. Furthermore, if the slot to be wound is not the slot closest to the dividing surface, the above-mentioned combination cannot be achieved, and the winding is continued by replacing it with a smaller guide, and winding the last slot by relying on the above-mentioned method. Therefore, extra steps such as replacing or removing the guide are required during the winding operation, resulting in extremely poor winding work efficiency.

In addition, as shown in FIG. 1, winding guides 8 and 8
The structure for attaching a, especially the winding guide 8a provided on the flyer side, falls within the locus of the flyer, so the winding guide 8a installed on the split core 1 or a structure fixed relatively to the center of rotation of the flyer 5 is recommended. The only option is to provide a line guide mechanism, and in either case, the mechanism has the disadvantage of being extremely complicated.

OBJECT OF THE INVENTION The present invention eliminates the above-mentioned conventional drawbacks.
It is an object of the present invention to provide a stator core for a toroidal winding motor, in which uniform winding can be reasonably performed using a simple winding guide while holding the toroidal winding in a chuck.

Composition of the Invention The split core of the present invention is provided with a protrusion that protrudes radially outward and toward the outside of the split surface on the outer periphery of one of the split surfaces, and the center of the core inner diameter is By deviating the line connecting the center of the slot opening and the center of the slot opening in the direction away from the protrusion, and by forming the tips of the iron core teeth into an L shape, it is easy to change the chuck or replace the winding guide during toroidal winding. There is no need to spend time and effort, uniform winding is possible with an extremely simple winding guide structure, and the structure of the winding machine is not only simplified, but also the winding efficiency is greatly improved, making production easier. This significantly improves performance.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an embodiment of a split core according to the present invention. The split core 1 is provided with a protrusion 10 on the outer periphery of one of the split surfaces 9, which protrudes outward in the radial direction as well as outward from the split surface. Also, the line A connecting the core inner diameter center of the split core 1 and the slot center does not match the line B connecting the slot opening center and the core inner diameter center, and the slot opening center is in the direction where the outer protrusion 10 is not provided. Slot center line A passing through the core inner diameter
It's off. Therefore, the tip portion 2a of the tooth portion 2 extending toward the center of the split core 1 is formed into a substantially L-shape.

Next, the case of winding the wire around the split core 1 will be explained using FIGS. 3 to 5.
The entire protrusion 10 is held by hooking the chuck 3 on the bottom surface 11 of the protrusion 10.

When the end of the electric wire 6 coming out of the flyer 5 is clamped at an appropriate position (not shown) and the flyer 5 is rotated, when the flyer 5 is at its retract limit, the electric wire 6 enters directly into the slot _S1 , and the iron core 1 yoke part 4
The electric wire 6 is wound around the flyer 5, and as the flyer 5 advances step by step, the electric wire 6 comes into contact with the winding guide 8 and slides into the slot _S1 . Here, when the electric wire 6 leaves the winding guide 8, the flyer 5 is already on the axial extension of the slot S1 of the iron core ₁ , so the electric wire 6 is between the yoke part 4 and the flyer 5. The wires are in a tensioned state, and can be wound around the continuation portion 4 uniformly and almost in alignment with a width corresponding to the swinging motion without being restrained by the winding guide 8. As the winding progresses and the opening of the slot _S1 is filled with the wire 6, it is expected that the state of charge of the wire 6 will become approximately triangular, but as a result of experiments, the state of charge of the wire 6 is expected to change depending on the tension of the wire during winding. It was confirmed that the winding could be wound almost uniformly within the slot _S1 , with some unevenness occurring.

This is the winding state when the winding guides 8 and 8a are attached to the tips 2a of the teeth on both sides of the slot _S1 on which the iron core 1 is wound, as described in FIG. It is no different from that.

With the winding now completed on the yoke 4 of the slot S ₁ , the iron core 1 is rotated and rocked in the direction of the arrow, with the flyer 5 and winding guide 8 still held by the chuck 3. When the chuck is moved, as shown in FIG. 4, the chuck does not prevent its movement, so that it becomes possible to wind the wire into the next slot _S2 .

Effects of the Invention As described above, the present invention provides a protrusion on one outer periphery of the core dividing surface of a split core, and also provides teeth so that the slot center line passing through the center of the inner diameter of the core does not coincide with the slot opening center. By arranging the winding wire, there is no need to take the trouble of changing the chuck or replacing the winding guide when winding, and it is possible to wind evenly with an extremely simple winding guide structure, and the winding machine Not only is the structure of
Since the winding efficiency is also greatly improved, productivity is significantly improved.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the winding state of a conventional toroidal winding motor, FIG. 2 is a plan view of a split core according to an embodiment of the present invention, and FIGS. 3 and 4 are an embodiment of the present invention. FIG. 5 is an explanatory diagram showing a winding state using the split core according to the example, and FIG. 5 is an enlarged plan view of the main part of FIG. 3. DESCRIPTION OF SYMBOLS 1... Split iron core, 2... Teeth, 7... Slot opening, 9... Split surface, 10... Protrusion.

Claims (1)

[Claims] 1 A split core in which the annular stator core is divided into two parts by diameter is provided with a protrusion that protrudes radially outward and toward the outside of the split surface on the outer periphery of one of the split surfaces, and a line connecting the center of the inner diameter of the core and the center of the slot. On the other hand, a stator core for a toroidal-wound motor has a line connecting the center of the inner diameter of the core and the center of the slot opening deviates in a direction away from the protrusion, and the tips of the core teeth are formed in a substantially L-shape.