JPH03124245A - Manufacture of stator for hypocycloid motor - Google Patents

Abstract

PURPOSE:To simplify the work and to prevent flux leakage by molding the inner circumferential edge section, front and rear faces of a tooth section core integrally out of nonmagnetic material, thereafter cutting off bridged/coupled section in the slot on the side of inner circumferential opening. CONSTITUTION:In core punching process, adjacent teeth 2 are held integrally while being bridged and coupled in a slot 4 on the side of inner circumferential opening 5 of arbitrary number of laminated core boards 5 constituting a tooth section core 9. In bonding process with a nonmagnetic material 11, inner circumferential edge section, front and rear faces, and the like, of the tooth section core 9 are molded integrally and held in place and then the bridged and coupled sections are punched off. The tooth section core 9 is held integrally in all processes, and teeth 2 adjacent to the tooth section core 9 are entirely separated magnetically and coupled through the nonmagnetic material 11. By such arrangement, work can be simplified and flux leakage can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing an internal rotor type motor stator used for driving fans of household electrical appliances and the like.

Conventional technology In general, an internal rotor motor stator in which the stator core is separated into a yoke part and a tooth part has a winding conductor wrapped around the tooth part core by direct winding. It is necessary to provide an opening in the inner circumference and connect and hold the inner circumference.

Conventionally, this type of internal rotor type electric motor stator is shown in Figs. 10 and 1.
As shown in FIG. 1, a core plate 102 having a bridging portion 101 on the inner peripheral edge and a core plate 103 having no bridging portion may be laminated in any combination to hold the toothed core integrally, or As shown in FIGS. 12 to 14, core plates 103 having no bridging portions are laminated on the inner periphery, and a non-magnetic material 104 is used to cover the inner periphery.

After the toothed core is held together by fixing the edges, the winding conductor 105 is wound through an insulator by direct winding and fitted onto the inner circumference of the yoke core 107. Ta.

Problems to be Solved by the Invention In such a conventional configuration, FIGS. 10 and 11,
As shown in FIG. 14, a bridge portion 101 is provided on the inner peripheral edge of the tooth core
If the magnetic flux generated by exciting the winding conductor 105 is saturated at the bridge portion 101, it will move toward the rotor (not shown), and the effective magnetic flux will decrease, causing the motor There was a problem that efficiency decreased.

In addition, as shown in FIGS. 12 to 14, in a structure in which there is no bridging part on the inner peripheral part of the toothed iron core and is fixed by non-magnetic material 1o4, there are Since there is an air gap 10B between the two, there is little leakage of magnetic flux and the efficiency of the motor is ensured.

However, since each of the plurality of teeth is completely independently laminated, the molding and fixing process using the non-magnetic material 104 is complicated and the work efficiency is extremely low.

The present invention is intended to solve these problems, and aims to provide a method for manufacturing a motor stator that ensures the efficiency of the motor, can be carried out in simple steps, and is easily automated.

Means for Solving the Problem In order to solve this problem, the first means of the present invention is to provide a toothed iron core having a plurality of teeth radially provided on the outer periphery of a rotor hole, and a toothed iron core having a plurality of teeth provided on the outer periphery of the rotor hole. and a yoke core that is fitted into the yoke core to form a magnetic path, and the toothed core has an opening on the inner peripheral side of a slot formed in the adjacent teeth and the yoke core. In the slot on the peripheral opening side, a core plate A in which adjacent teeth are bridged and connected to each other and a core plate B in which adjacent teeth have no bridge or connection part are arbitrarily laminated and fixed. After molding and fixing the inner periphery, front and back surfaces, etc. of the toothed iron core together with a non-magnetic material, the step of cutting out the bridging/connecting portion provided in the slot on the inner periphery opening side. The configuration is as follows.

In addition, the second means is an iron core plate having a bridging/connecting portion in which adjacent teeth are omitted from each other in page 5 in the slot on the inner circumferential opening side, and a core plate having a bridging/connecting portion where adjacent teeth are omitted. It is constructed by arbitrarily laminating and fixing iron core plates that do not have any iron core plates.

By the configuration of the first means described above, in the core punching process, the teeth of the toothed core are integrally formed by bridging and connecting adjacent teeth in the slots on the inner peripheral opening side of any number of laminated A core plates. After the inner peripheral edge, front and back surfaces, etc. of the toothed iron core are molded and held together in a fixing process using a non-magnetic material, the bridging/connecting portion is removed by force removal. In this way, in each of the steps described above, the tooth core is not divided and is held as one piece, so the work in each step is simplified.

In addition, in the toothed iron core, all adjacent teeth are magnetically separated from each other and connected by a non-magnetic material, so leakage of magnetic flux is also extremely small.

In addition, since the second means has a structure in which the adjacent teeth have a bridging/connecting portion that is omitted, the bridging/connecting portion is punched out and removed after the fixing process using a non-magnetic material. When doing so, the work can be done easily. Other work simplification effects and magnetic flux leak prevention effects are equivalent to those of the first means.

EXAMPLE Hereinafter, an example according to the first means of the present invention will be described based on FIGS. 1 to 7.

In FIGS. 1, 2, and 6, a rotor hole 1 into which a rotor (not shown) is inserted has a plurality of teeth 2 arranged radially outward, and adjacent teeth 2 and yoke. An opening 5 is provided in all the inner peripheral edges of the slot 4 formed by the inner peripheral part of the iron core 3, and the adjacent teeth 2 in the slot 4 on the side of the opening 5 form a bridging/connecting part. A toothed core 9 is constructed by punching and laminating any desired number of A core plates A having 6 and B core plates 8 having no bridging/connecting portions 6. Figure 3.

In FIG. 4, the toothed core has an inner peripheral edge and front and back surfaces integrally molded with a non-magnetic material 11 while having a bridging/connecting part 6 provided in the slot 4 on the inner peripheral opening 6 side. It consists of FIG. 5 shows seven adjacent bays with the bridge/connection portion 6 removed.

The teeth 2 are molded with a non-magnetic material 11 at their inner peripheral edges and are integrally connected and held. FIG. 7 shows that a winding conductor 13 is directly wound on the toothed core 9 shown in FIG. The yoke core 3 is press-fitted into the yoke portion.

In the above configuration, in the punching and laminating process of the toothed core and core, the adjacent teeth 2 are bridged and connected to the A core plate 7 which is bridged and connected within the slot 4 on the opening 5 side on the inner peripheral side.・An arbitrary number of B iron core plates 8 without a connecting part 6 are stacked and held together, making it easy to handle in the next mold fixing process using the non-magnetic material 11, simplifying the mold fixing work. be converted into After this mold fixing work is completed, the bridging/connecting portion 6 of the tooth core 9 is cut out by punching, and the inner peripheral edge thereof is integrally connected with a non-magnetic material 11.
Retained. Therefore, the subsequent steps of winding the windings, press-fitting the yoke core 3, etc. can be carried out very easily. After the press-fitting of the yoke core 3 is completed, the adjacent teeth 2 of the tooth core 9 are connected to each other by the non-magnetic material at their inner peripheral edges, and are therefore magnetically separated. Of the magnetic flux generated when current flows through the pony-wound conductor 13, the amount of magnetic flux that leaks to adjacent poles or adjacent teeth becomes extremely small.

Next, an embodiment according to the second means of the present invention is shown in FIGS. 6 to 9.
The diagram will be explained. Note that the same parts as those in the first means are given the same symbols, and detailed explanation thereof will be omitted. In the figure, the toothed iron core 9 has the adjacent teeth 2 in the slot 4 on the opening 5 side of the inner peripheral edge of the A core plate 7 which has the bridging/connecting portion 6 in a cut-out state. The toothed core 9 is formed by punching and laminating any number of B core plates 8 that do not have the B core plates.

In the above configuration, after the tooth core 9 is molded and fixed using the non-magnetic material 11, the bridging/connecting portion 6 is punched out. However, since the tooth core 9 is left blank, it is extremely easy to cut out the bridging/connecting portion 6. can. The other operations are the same as the first means and are nine vanes, so the explanation will be omitted.

Effects of the Invention As is clear from the above embodiments, according to the present invention, adjacent teeth are supplied and connected in the slot on the opening side of the inner peripheral edge of the tooth core to hold the tooth core together. This simplifies the work by making it easier to handle the toothed core during the mold fixing process using non-magnetic material. Since the inner peripheral edge is held together by a non-magnetic material, it is easy to work in the winding process, and all stator slots have openings at the inner peripheral edge and are magnetically held together. Since the leakage magnetic flux is very small, the efficiency of the motor can be maintained.

In addition, by constructing bridges and connecting parts in a careless manner,
After the mold fixing step using the non-magnetic material, the bridging/connecting portion can be punched out and removed very easily. Other effects are the same as above.

1o b/

[Brief explanation of the drawing]

Fig. 1 is a top view of the toothed core of an internal rotor type electric motor showing an embodiment of the first means of the present invention, Fig. 2 is a view showing the main part on the inner circumference side, and Fig. 3 is a view showing the same mold fixation. FIG. 4 is a partial cross-sectional view of the top surface of the toothed core after the process, FIG. 4 is a cross-sectional view of the same X-o-x', FIG.
7 is a partial sectional view of the finished product of the stator, FIG. 8 is a top view of the toothed core showing an embodiment of the second means of the present invention, and FIG. Figure 9 shows the main part on the inner circumferential side of the same, Fig. 1o is a top view of the tooth core of the conventional internal rotation type electric motor, Fig. 11 shows the main part on the inner circumferential side of the motor, and Fig. 12 shows the main part on the inner circumferential side. FIG. 13 is a top view of the toothed core after the mold fixing process, FIG. 13 is a view showing the main part on the inner peripheral side, and FIG. 14 is a top view of the finished stator. 1... Rotor hole, 2... Teeth, 3...
...Yoke core, 4...Slot, 5...
... Opening (inner circumference), 6... Bridge/connection part, 7... A core plate, 8... B core plate,
9... Teeth iron core, 11... Non-magnetic material, 13... Winding conductor. Fig. 2 Tooth 7---C4 loss 1υ Oe No. 1 JP-A-3 124245 (5) Fig. 10 Fig. 11 Fig. 13 Fig. 04-

Claims (2)

[Claims] (1) A toothed iron core having a plurality of teeth provided radially around the outer periphery of the rotor hole, and a yoke iron core that is fitted to the outer periphery of the toothed iron core to form a magnetic path, The iron core has an opening on the inner peripheral side of the slot formed by the adjacent teeth and the yoke part iron core, and the adjacent teeth are bridged and connected to each other within the slot on the inner peripheral opening side. It is constructed by arbitrarily laminating and fixing an iron core plate and a B iron core plate whose adjacent teeth have no bridging or connecting parts, and the inner peripheral edge of the toothed iron core and the front and back surfaces etc. are integrated with non-magnetic material. A method for manufacturing an internal rotary motor stator, comprising the step of cutting off a bridge/connection portion provided in the slot on the inner peripheral opening side after molding and fixing the stator. (2) A core plate in which adjacent teeth in the slot on the inner circumferential opening side have a bridging/connecting portion with omissions, and a B core in which adjacent teeth have no bridging/connecting portion at all. 2. The method of manufacturing an internal rotary motor stator according to claim 1, wherein the stator is constructed by arbitrarily laminating and fixing plates.