JPH05252701A - Manufacture of stator for dynamo-electric machine - Google Patents

Abstract

PURPOSE:To handle each tee, integrating it in the condition that the tenacity in coupling is elevated at assembling. CONSTITUTION:Four tees 3 are handled in the condition that they are put in a tee assembly 10 being constituted integrally by four tee pieces 4 and a coupling steel plate 9. The coupling steel plate 9 is made in the condition that a tee part 9a and a board part 9b corresponding to field space 6 are coupled integrally. A resin mold part is made in this tee assembly by resin molding, and each tee is coupled integrally. After winding of coil, it is attached to a yoke, and the plate part 9b of the coupling plate 9 is die-cut by a press, and it is made a stator. Each tee 3 can be handled in the condition that the tenacity in coupling is elevated by the plate part 9b of the coupling plate 9, though it is of such an efficient constitution that it has prevented leaked magnetic flux as a stator, so the work efficiency and dimension precision improve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a stator for a rotary electric machine, wherein a plurality of teeth are attached to a yoke while coils are wound around the teeth.

[0002]

2. Description of the Related Art A stator for a rotary electric machine of this type is integrally formed by winding a coil around each of a plurality of teeth and attaching them to a yoke. However, handling a plurality of teeth separately in this way has a problem in that the number of parts is increased, the process is complicated, and the dimensional accuracy is easily deteriorated.

Therefore, for example, Japanese Patent Laid-Open No. 63-22465.
The method shown in Japanese Patent Publication No. 1 has been considered. That is, in this method, a tooth core formed by arbitrarily laminating an iron core plate having a bridging portion and an iron core plate having no bridging portion on the inner peripheral edges of adjacent teeth is formed, and the tooth core is made of an insulating material. The bridging part is cut off before the mold is fixed together.

As a result, the tooth cores are always held together at the completion of the lamination of the core plates, the molding process using the insulating material or the winding work of the winding conductors, and the bridge is used during the molding process. By cutting the tangled portion, the stator can be configured to prevent leakage of magnetic flux, so that workability can be improved and efficiency as an electric motor can be secured.

[0005]

However, in the above-mentioned conventional method, since the bridging portion connecting the adjacent teeth is narrow, the tooth core is always held integrally, but the connecting holding force is not enough. Since it is small, deformation is likely to occur during the molding process, and further, manufacturability or dimensional accuracy of assembly is likely to deteriorate.

Further, in the conventional method as described above, since it is necessary to separately manufacture an iron core plate having a bridging portion and an iron core plate having no bridging portion by a punching die, the manufacturing cost is high. There is a problem that becomes.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce the number of parts by integrally forming a plurality of teeth while maintaining a structure for preventing the generation of leakage magnetic flux. An object of the present invention is to provide a method for manufacturing a stator for a rotating electric machine, which can increase the force to reduce the occurrence of defects such as deformation as much as possible and can reduce the manufacturing cost.

[0008]

SUMMARY OF THE INVENTION The present invention is directed to a method of manufacturing a stator for a rotary electric machine, wherein a plurality of teeth are attached to a yoke in a state where coils are wound around each of the teeth. A step of forming a tooth assembly in which the plurality of teeth are integrally connected by a connecting iron plate formed by integrally forming a tooth portion corresponding to the plurality of teeth and a plate portion corresponding to the plate portion; It is characterized in that it is configured by providing a step of integrally resin-molding a portion excluding the plate portion of the connecting iron plate and a step of removing the plate portion of the connecting iron plate in the resin-molded tooth assembly. ..

Further, according to the present invention, in the above object, a plurality of teeth are integrally connected by a connecting iron plate formed by integrally forming a tooth portion corresponding to the teeth and a plate portion corresponding to the field space portion. Of the tooth assembly, a step of attaching the tooth assembly to the yoke in a state where a coil is wound around each tooth, and a step of removing the plate portion of the connecting iron plate. good.

[0010]

According to the method of manufacturing a stator for a rotary electric machine according to claim 1, a plurality of teeth can be handled until resin molding as a tooth assembly in a state of being integrally joined by a connecting iron plate. Since the plate part of the connecting iron plate is removed after being integrated by resin molding, it can always be handled in an integrated state, and the teeth part is connected by the plate part corresponding to the field space part of the connecting iron plate. Therefore, there is no possibility of problems such as deformation during processing, and since this plate is finally removed, it is possible to make a configuration in which leakage magnetic flux does not occur between teeth, and it is possible to realize a rotary electric machine. Does not reduce the efficiency of.

According to the method of manufacturing a stator for a rotary electric machine according to a second aspect, a plurality of teeth can be handled as a teeth assembly integrally connected by a connecting iron plate, and the teeth assembly yoke can be used. Since the plate part of the connecting iron plate is removed when worn, it can be handled in an integrated state at all times, and since the teeth part is connected by the plate part corresponding to the field space part of the connecting iron plate, There is no danger of deformation such as deformation during processing, and since this plate is finally removed, it is possible to make a configuration that leakage magnetic flux does not occur between the teeth and improve the efficiency as a rotary electric machine. Does not lower.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an electric motor will be described below with reference to the drawings.

First, in FIG. 8 showing the entire structure of the stator 1, the yoke 2 having a rectangular frame shape arranged on the outer peripheral portion is
A fitting groove 2a is formed at the center position on the inner peripheral side of each side. The plurality of four teeth 3 are fitted to the fitting groove 2a of the yoke 2 by the fitting protrusions 3a and are attached to the yoke 2.

These four teeth 3 are integrally joined by a resin mold portion 4, and each tooth 3 has a winding frame 4a formed by resin molding. The coil 5 is wound around the winding frame body 4 a of each tooth 3. The cylindrical space portion surrounded by the four teeth 3 is a field space portion 6, and a rotor (not shown) is arranged at the time of assembling as a motor, and the stator 1 is attached to the rotor. A rotating magnetic field is applied from the side. The yoke 2 and the four teeth 3 described above are each formed by laminating a large number of punched steel plates.

Now, the four teeth 3 are handled as follows in the manufacturing process.
That is, as shown in FIG. 1, four teeth pieces 8 are formed by stacking a large number of punched steel plates 7 formed by punching silicon steel plates into the shape of the teeth 3.

A connecting steel plate 9 as a connecting iron plate is formed by integrally forming four tooth portions 9a corresponding to the punched steel plate 7 and a plate portion 9b corresponding to the field space portion 6, which is described above. As described above, when the punched steel sheet 7 is manufactured, the step of punching out the portion corresponding to the field space portion 6 is omitted so that the plate portion 9b is left and integrally formed.

Each tooth portion 9 of the connecting steel plate 9 is
By laminating the tooth pieces 8 on a, the four tooth pieces 8 are integrated to form a tooth assembly 10 as shown in FIG. The vertical cross section of the tooth assembly 10 is as shown in FIG. 3, whereby the four teeth 3 are formed by the plate portion 9b of the connecting steel plate 9 in a joined state.

Next, the tooth assembly 10 is formed in a state in which the four teeth 3 are integrally connected by the resin mold portion 4 as shown in FIG. 4 through the resin mold forming step. Also, when molding this resin mold,
At the same time, a winding frame body 4a for winding the coil 5 is integrally formed on each tooth 3.

In the tooth assembly 10 thus resin-molded, the coils 5 are then wound around each of the four teeth 3 to obtain the state shown in FIG. Then, the teeth assembly 10 is made up of the yoke 2 as shown in FIG.
Mounted on. At this time, the tooth assembly 10 is press-fitted so that the fitting protrusion 3a formed at the tip of each tooth 3 fits into the fitting groove 2a formed in the yoke 2. There is.

Next, the plate portion 9b of the connecting steel plate 9 remaining in the portion corresponding to the field space portion 6 of the tooth assembly 10 is removed by cutting. In other words, the plate portion 9b, to which the four teeth 3 have been joined until the resin molding, is an unnecessary portion in the end, and is removed by press punching here.

In this step, as shown in FIG.
The upper die and the lower die are inserted from above and below the field space portion 6 of the tooth assembly 10 to cut the plate portion 9b. As a result, the stator 1 as shown in FIG. 8 is completed. Then, when cut in this manner, the teeth 3 are in a magnetically separated state on the side of the field space portion 6.

According to the present embodiment as described above, in the manufacturing process, the four teeth 3 are handled as the teeth assembly 10 integrally joined by the connecting steel plates 9, so that the number of parts is reduced and workability is improved. Can be improved. In this case, the connecting steel plate 9 can be formed by omitting the step of cutting the part corresponding to the field space 6 during the manufacturing of the punched steel plate 7 for forming the tooth piece 8. Since no punching die is required, it can be performed at low cost.

Further, since the plate portion 9b of the connecting steel plate 9 is a portion corresponding to the field space portion 6, it is possible to increase the strength of the joint portion, which may cause deformation or decrease in accuracy during the assembly process. It is possible to prevent the occurrence of defects. Even in this case, since the completed stator 1 can be configured to have no bridging portion between the adjacent teeth 3, it can be configured as an efficient electric motor with no leakage magnetic flux. is there.

In the above embodiment, the step of cutting the plate portion 9b of the connecting steel plate 9 is carried out after the teeth assembly 10 is fitted to the yoke 2, but the invention is not limited to this, and for example, the teeth assembly is possible. If the four teeth 3 are integrally connected to each other by resin molding of 10, the coil 5 may be mounted before winding the coil 5 or before being fitted to the yoke 2.

In the above embodiment, the case where the coil winding frame 4a is simultaneously formed at the time of resin molding is described. However, the present invention is not limited to this. For example, after the resin molding portion 4 is formed, the coil is previously formed. The present invention can also be applied to the case where the winding frame body wound around is attached to each tooth 3.

Further, in the above embodiment, the case where the plate portion 9b of the connecting steel plate 9 is removed by punching is described, but the present invention is not limited to this, and may be cut by a laser beam machine or the like, or It may be removed by cutting.

In the above embodiment, the case where one connecting steel plate 9 is used has been described, but the present invention is not limited to this. For example, two connecting steel plates 9 may be arranged on both sides of the tooth assembly 10. Alternatively, a large number of sheets can be cut as long as they can be cut, and the position where they are arranged is not limited to the end face portion, and the teeth assembly 10 may be formed by inserting the teeth assembly 10.

By the way, in the above embodiment, the case where resin molding is carried out has been described, but the same effect can be obtained also in the manufacturing method when resin molding is not carried out.

That is, in this state, in addition to the tooth assembly 10 shown in FIG. 2, a winding frame body around which the separately formed coil 5 is wound is attached to each tooth 3 and corresponds to FIG. To form. After that, the tooth assembly 10 is attached to the yoke 2, and the cutting process is performed in a state where each tooth 3 is fixed to the yoke 2.

As a result, the teeth 3 are integrally formed in the state of being attached to the yoke 2 even if they are individually cut and separated. Therefore, even in this case, the number of parts can be reduced to reduce the complexity of the working process, and the teeth assembly 10 can be handled in a state in which the strength of the joint portion is increased, so that the teeth assembly 10 may be deformed during processing or the size of the assembly. It is possible to suppress the occurrence of problems such as deterioration in accuracy as much as possible.

Even in this case, the completed stator 1
As a result, since there can be no bridge portion between adjacent teeth 3, the electric motor can be configured as a highly efficient stator that eliminates leakage magnetic flux.

[0032]

According to the method of manufacturing a stator for a rotary electric machine according to the first aspect of the present invention, a plurality of teeth are integrally joined by a connecting iron plate until the resin molding is performed. It can be handled in an integrated state at all times, and each tooth part is connected by a plate part corresponding to the field space part of the connecting iron plate, preventing the generation of leakage magnetic flux between each tooth after removal. It is possible to reduce the number of parts, improve workability, prevent defects such as deformation during machining, and reduce cost, while having a configuration that prevents the efficiency of the rotating electrical machine from decreasing. Play.

According to the method for manufacturing a stator for a rotary electric machine of claim 2, a plurality of teeth can be handled in an integrated state as a tooth assembly in which a plurality of teeth are integrally connected by a connecting iron plate. When the teeth assembly is attached to the yoke, the plate part of the connecting iron plate is removed,
While preventing the generation of leakage magnetic flux between each tooth and preventing the efficiency of the rotating electric machine from decreasing, it also reduces the number of parts and improves workability while preventing the occurrence of defects such as deformation during processing. In addition to being able to do so, it has an excellent effect that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a process of assembling a tooth showing an embodiment of the present invention.

FIG. 2 is an external perspective view of the teeth assembly.

FIG. 3 is a vertical sectional side view of teeth assembly.

FIG. 4 is a front view of the teeth assembly after the resin molding process.

FIG. 5 is a view corresponding to FIG. 4 after winding the coil.

FIG. 6 is a view corresponding to FIG. 4 shown in a state of being attached to a yoke.

FIG. 7 is a vertical sectional side view of the teeth assembly showing a cutting process.

FIG. 8 is a front view showing the overall structure of the stator.

[Explanation of symbols]

1 is a stator, 2 is a yoke, 3 is a tooth, 4 is a resin mold part, 4a is a winding frame, 5 is a coil, 6 is a field space part,
7 is a silicon steel plate, 8 is a tooth piece, 9 is a connecting steel plate (connecting iron plate), 9a is a tooth portion, 9b is a plate portion, and 10 is a tooth assembly.

Claims (2)

[Claims] 1. A method of manufacturing a stator for a rotary electric machine, wherein a plurality of teeth are attached to a yoke in a state where coils are respectively wound around the plurality of teeth, and the plurality of teeth are provided with corresponding teeth portions. A step of forming a tooth assembly in which the plate portion corresponding to the field space portion is integrally connected by a connecting iron plate is formed, and this tooth assembly is integrated in a portion excluding the plate portion of the connecting iron plate. 2. A method for manufacturing a stator for a rotating electric machine, comprising: a step of resin-molding a resin mold; and a step of removing the plate portion of the connecting iron plate in the resin-molded tooth assembly. 2. A method for manufacturing a stator for a rotary electric machine, wherein each of a plurality of teeth is attached to a yoke in a state in which a coil is wound, and the plurality of teeth are provided with teeth corresponding to the teeth. A step of forming a tooth assembly in a state in which a plate portion corresponding to the field space portion is integrally formed by a connecting iron plate, and a step in which the tooth assembly is wound around each of the teeth. A method of manufacturing a stator for a rotary electric machine, comprising: a step of attaching to a yoke; and a step of removing a plate portion of the connecting iron plate.