JPH10178749A - Core, laminated core and their manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easily and quickly to perform attachment to and detachment from a wire winding apparatus, transportation and assembly. SOLUTION: A pair of band-shaped sections 11, 11 extending in parallel, yoke sections 12 coupled between both the band-shaped sections 11, 11 with thin portions 13 in-between, and placed in a plurality of stages in the direction of extension for the band-shaped sections 11 with specified spaces in-between, and a plurality of magnetic pole teeth sections 14 protruding from the yoke sections 12, in parallel with the band-shaped sections 11 at specified intervals, are formed by punching a hoop-shaped magnetic material with a press.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electric motor,
The present invention relates to a core and a laminated core of electromagnetic application equipment such as a generator and a magnetic head, and a method of manufacturing the same.

[0002]

2. Description of the Related Art FIG. 15 is a plan view showing the structure of a conventional step motor disclosed in Japanese Patent Application Laid-Open No. 62-163556, and FIG. 16 is a sectional view showing the structure of a main part of the step motor in FIG. In the drawing, reference numerals 1 and 2 denote U-shapes and have magnetic poles 1a and 1b and 2a and 2b at both ends, respectively. The inserted winding frame 4 is a winding wound around the winding frame 3, 5 is both stator cores 1,
2 are rotors rotatably disposed at positions corresponding to the respective magnetic poles 1a, 1b, 2a, 2b. These rotors 1 to 5 are assembled on a substrate 6.

FIG. 17 is a plan view showing the configuration of a conventional thin motor disclosed in Japanese Patent Application Laid-Open No. 8-19196.
8 is a cross-sectional view showing the configuration of the thin motor in FIG. 17, and FIG. 19 is a plan view showing the configuration of the connected stator core shown in FIG. In the figure, 7 is a substrate, 8 is a magnetized substrate 7
A rotor 9 rotatably arranged on the upper side is a connecting stator core, which is made of a magnetic material and each of the blocks 9a is formed to be bent through a thin portion 9b as shown in FIG.
Is wound, the thin portion 9b is bent into an annular shape as shown in FIG. 17, and the blocks 9a are assembled on the substrate 7 so as to face the rotor 8.

[0004]

The conventional motor core is constructed as described above.
In the apparatus disclosed in Japanese Patent No. 556, the winding frame 3 is separately required, and during mass production and assembly, it takes time to attach and detach the winding frame 3 to and from the winding device, and to insert the winding frames 3 into the stator cores 1 and 2. In addition, since the winding frame 3 occupies a limited space around each of the cores 1 and 2 by its thickness, the winding amount of the winding 4 is limited, and there is a limit in reducing the size of the motor. There was a problem.

[0005] In addition, in Japanese Unexamined Patent Application Publication No. Hei 8-19196, the problem caused by the necessity of the winding frame 3 as described above is solved. There has been a problem that it is still time-consuming to attach / detach / transfer to / from the winding device, or to perform bending work after winding.

The present invention has been made in order to solve the above-mentioned problems, and a core, a laminated core, and a method of manufacturing the core, which can be easily and quickly attached to and detached from a winding device, transported, and assembled. It is about.

[0007]

According to a first aspect of the present invention, there is provided a core connected to a pair of strips extending in parallel with each other via a thin portion between the strips and extending the strips. Pressing and punching a hoop-shaped magnetic member from a plurality of yoke portions arranged at predetermined intervals in the direction and a plurality of magnetic pole teeth portions projecting from the yoke portion at predetermined intervals in parallel with the band-shaped portion. It was formed by:

A core according to a second aspect of the present invention is the core according to the first aspect, wherein cutouts are formed at predetermined intervals in the extending direction at positions opposed to both band-shaped portions.

A core according to a third aspect of the present invention is the core according to the first aspect, wherein a bent edge is formed at an end of each of the pole teeth portions.

A core according to a fourth aspect of the present invention is the core according to the first aspect, wherein a folded portion is formed in a predetermined region beside each of the magnetic pole taste portions.

According to a fifth aspect of the present invention, there is provided the core according to the first aspect, wherein a projection is formed in the vicinity of the connection between the thin portions of the two band-shaped portions.

According to a sixth aspect of the present invention, there is provided the core according to the first aspect, wherein a plurality of the yoke portions are connected to each other via a thin portion at each stage, and the protruding directions of the magnetic pole teeth are adjacent to each other. They are formed opposite to each other and alternately in the connection direction.

According to a seventh aspect of the present invention, there is provided a method of manufacturing a core, comprising: a pair of strips extending parallel to each other; A plurality of yoke portions arranged at predetermined intervals with a predetermined interval, and a plurality of pole teeth portions projecting from the yoke portion at predetermined intervals in parallel with the band-shaped portion, by press-punching a hoop-shaped magnetic member It includes a forming step, a step of erecting each yoke part and each magnetic pole taste part by twisting the thin part, and a step of winding a winding around each erect magnetic pole taste part.

Further, according to a method of manufacturing a core according to claim 8 of the present invention, there is provided a pair of strips extending in parallel with each other, the strips being connected to each other via a thin portion, and the extending direction of the strips. A plurality of yoke portions arranged at predetermined intervals with a predetermined interval, and a plurality of pole teeth portions projecting from the yoke portion at predetermined intervals in parallel with the band-shaped portion, by press-punching a hoop-shaped magnetic member The step of forming, the step of erecting each yoke part and each magnetic pole taste part by twisting the thin part, the step of winding the winding around each erect magnetic pole taste part, and twisting the thin part in reverse A step of returning each yoke part and each magnetic pole tee part to the original state, and a step of bending each yoke part into a square wave shape and forming each magnetic pole tee part in such a manner that the surfaces in the width direction face each other in parallel. Which includes That.

According to a ninth aspect of the present invention, there is provided a method of manufacturing a core, comprising: a pair of belt-like portions extending in parallel; a thin portion between the two belt-like portions; A plurality of yoke portions arranged at predetermined intervals with a predetermined interval, and a plurality of pole teeth portions projecting from the yoke portion at predetermined intervals in parallel with the band-shaped portion, by press-punching a hoop-shaped magnetic member Forming, erecting each yoke part and each magnetic pole taste part by twisting the thin part, winding a winding around each erect magnetic pole taste part, bending each thin part, and A step of forming an annular shape such that the magnetic pole taste portion is on the inside.

According to a tenth aspect of the present invention, there is provided a method of manufacturing a core according to any one of the seventh to ninth aspects, wherein the winding of the winding is performed without cutting the crossover.

The laminated core according to the eleventh aspect of the present invention is connected to a pair of band-shaped portions extending in parallel with each other via a thin portion between the band-shaped portions, and is provided in a predetermined direction in the extending direction of the band-shaped portions. A plurality of yoke portions arranged at a plurality of intervals, and a plurality of magnetic pole teeth portions protruding from the yoke portion at predetermined intervals in parallel with the band portion are formed by press-punching a hoop-shaped magnetic member. A plurality of stacked cores are stacked.

A laminated core according to a twelfth aspect of the present invention is the laminated core according to the eleventh aspect, wherein a thin-walled portion is removed while leaving a part of the core.

A thirteenth aspect of the present invention provides a laminated core according to the eleventh or twelfth aspect, wherein each core is fixed by crimping or welding.

Further, the core according to claim 14 of the present invention is:
A pair of band-shaped portions extending in parallel, a plurality of first yoke portions connected via thin portions at predetermined intervals in the extending direction of the two band-shaped portions, and a plurality of first yoke portions each having a thin portion. The second to branch
A pair of second yoke portions connected to each other via a thin portion of the pair, and a plurality of symmetrically protruding from the paired first and second yoke portions in a direction parallel to the band portion and in a direction opposite to each other. The magnetic pole taste portion is formed by press-punching a hoop-shaped magnetic member.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a perspective view showing a configuration of a core according to Embodiment 1 of the present invention, FIG. 2 is a perspective view showing a configuration of a pallet-shaped core shown in FIG. 1, and FIG. FIG. 4 is a perspective view showing a method, and FIG. 4 is a perspective view showing a configuration of a core on which a winding is applied in FIG.

In the drawing, reference numeral 11 denotes a pair of strips extending in parallel and having press holes 11a for feeding the press, and 12 denotes a pair of strips 11 connected to A plurality of yoke portions 14 are formed at predetermined intervals in the extending direction of the magnetic poles, 14 are a plurality of magnetic pole teeth portions protruding from the yoke portion 12 at predetermined intervals in parallel with the band portions 11, and 15 are both band portions. Notches formed at predetermined positions in the extending direction at positions opposed to each other 11, 11, and these 11 to 15 constitute the core 16.
Then, the pallet-shaped core 17 is formed by separating the two band-shaped portions 11, 11 by the notch 15. Reference numeral 18 denotes a winding wound around each of the pole teeth portions 14, and 19 denotes a winding device provided with a number of winding nozzles 19a.

Next, a method of manufacturing the core according to the first embodiment configured as described above will be described. First, a pair of belt-like portions 11, 11, a yoke portion 12, a thin portion 13, a magnetic pole taste portion 14, and a notch 15 are formed as shown in FIG. After that, if necessary, the two belt-shaped portions 11 are cut with the notch 15 at a desired position, and the pallet-shaped core 17 is formed separately. Next, the core 17 is subjected to insulation treatment by electrodeposition coating or the like, and each thin portion 13 is twisted to thereby bend and raise each yoke portion 12 and the magnetic pole taste portion 14.

In this state, the core 17 is connected to the winding device 1.
9, and a plurality of winding nozzles 19a arranged in a matrix as shown in FIG.
4, the windings 1 are simultaneously wound on the magnetic pole teeth portions 14 corresponding to the number of winding nozzles 19a.
8 is applied. When the winding is applied to all of the pole teeth portions 14 in this manner, the thin portions 13 are cut off to separate the yoke portions 12 from the two belt portions 11, 11. Such a connected stator core is completed.

As described above, according to the first embodiment, the pair of strips 11, 11, the yoke 12, the thin portion 13, the magnetic pole teeth 14, and the notch are formed by stamping out the hoop-shaped magnetic member. Forming the core 1
6 and the pallet-shaped core 17 is formed by cutting the two belt-shaped portions 11 and 11 with the notch 15 at a desired position as necessary. In addition, since the yoke portion 12 and the magnetic pole taste portion 14 are bent and raised by twisting the thin portion 13, the winding work of the winding 18 around the magnetic pole taste portion 14 is facilitated. A core suitable for mass production assembly and a method for manufacturing the core can be provided.

Embodiment 2 FIG. 5 is a perspective view showing a configuration of a core according to Embodiment 2 of the present invention in a state in which windings are wound, FIG. 6 is a perspective view showing details of a main part of the core in FIG. 5, and FIG. FIG. 2 is a perspective view showing a configuration of a step motor to which the core in FIG. In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 20 denotes both band-shaped portions 11 through the thin portion 13,
The yoke portions are connected to the yoke portion 11 and are formed in a plurality of steps at predetermined intervals in the extending direction of the belt-shaped portion 11. It is formed so as to be parallel.

Numeral 21 denotes a plurality of magnetic pole teeth projecting from the yoke 20 in parallel with the band 11 at a predetermined interval. As shown in FIG. 6, each tip has a shape corresponding to an outer peripheral surface of a rotor described later. The folded edge 21a is folded into a predetermined area on the side, and the folded portion 2 folded into a rectangular shape in cross section
1b are respectively formed, and these 11, 13, 2
A pallet-shaped core 22 is constituted by 0, 21, 21a, and 21b. Reference numeral 23 denotes a substrate, reference numeral 24 denotes a rotor rotatably supported on the substrate 23, and reference numeral 25 denotes a ring-shaped magnet incorporated on the outer periphery of the rotor 24.

Next, a method of manufacturing the core according to the second embodiment configured as described above will be described. First, a hoop-shaped magnetic member is press-punched to form a pair of band-shaped portions 11, 11, a yoke portion 12, a thin portion 13, and a pole tooth portion 14 as shown in FIG. As shown in FIG. 6, a bent edge 21a is formed by bending the tip of each of the magnetic pole teeth 14 and a folded region is formed by folding a predetermined side area into a rectangular cross section. Each of the magnetic pole taste portions 21 is formed by forming each of the magnetic poles 21b, and if necessary, the band-shaped portions 11, 11 are cut and separated by the notch 15 at a desired position, thereby forming a pallet-shaped core 22. Insulate by electrodeposition coating or the like.

Next, by twisting each thin portion 13, each yoke portion 12 and magnetic pole taste portion 21 are bent and raised to stand up. In this state, although not shown, each magnetic pole taste portion 21 is folded by a winding device. Part 21b
Is wound around the wire. After that, by twisting each thin portion 13 in the opposite direction, each yoke portion 12 and the magnetic pole taste portion 21 are returned to the original state, and the yoke portion 12 is bent into a square wave shape as shown in FIG. The yoke portion 20 is formed by forming the widthwise surfaces of the magnetic pole teeth portions 21 so as to face in parallel with each other.

In the case of the fourth embodiment, the stator 26 is constituted by separating the magnetic pole teeth 21 into four pairs each, and two pairs of the stators 21 are formed as shown in FIG. Are arranged so as to face the ring-shaped magnetic pole 25 incorporated in the rotor 24 on the substrate 23, and by sequentially switching the current flowing through each winding 18,
a, that is, the magnetic field generated by the magnetic poles is changed to rotate the rotor 24, thereby obtaining a small step motor for driving a head of a floppy disk drive or the like via a transmission mechanical element such as a rack and pinion or a ball screw.

As described above, according to the second embodiment, as in the case of the first embodiment, the two band-shaped portions 11, 11 are cut with notches at desired positions as required, and the pallet-shaped portions are cut. Since the core 22 is formed, it is easy to transport and attach / detach to / from the winding device. Further, by twisting the thin portion 13, each yoke portion 12 and the magnetic pole taste portion 21 are bent and raised to stand. Therefore, the winding work of the winding 18 around the magnetic pole taste portion 21 becomes easy, and a core suitable for mass production assembly and a method of manufacturing the core can be provided.

Further, a bent edge 21a having a shape corresponding to the outer peripheral surface of the rotor 24 is provided at the tip of the magnetic pole teeth portion 21, and a fold having a rectangular cross section is provided in a region where the side winding 18 is wound. Since each of the portions 21b is formed, a desired magnetic path can be secured by the folded portion 21b without lamination, and the area of the magnetic pole facing the rotor 24 can be sufficiently secured by the bent edge 21a. You can also get

Embodiment 3 FIG. 8 is a perspective view showing a configuration of a core according to a third embodiment of the present invention in a state in which windings are wound, and FIG. 9 shows a method of simultaneously forming a plurality of stators by bending the core in FIG. FIG. 10 is a perspective view showing a configuration of the core according to Embodiment 3 of the present invention which is different from that of FIG. In the figure,
The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Reference numeral 27 denotes a projection formed by cutting and raising the vicinity where the thin portions 13 of the belt-shaped portions 11 are connected.

Next, a method of manufacturing the core according to the third embodiment configured as described above will be described. First, although not shown, as in the case of the first embodiment, the hoop-shaped magnetic member is press-punched to form a pair of band-shaped portions 11, 11, a yoke portion 12, a thin portion 13, a magnetic pole taste portion 14, The core is formed by forming the notch 15, and then, if necessary, the band-shaped portions 11, 11 are cut with the notch 15 at a desired position, and the pallet-shaped core 17 is formed separately. Next, the core 17 is subjected to insulation treatment by electrodeposition coating or the like, and each thin portion 13 is twisted to thereby bend and raise each yoke portion 12 and the magnetic pole taste portion 14.

Next, in this state, it is conveyed to the winding device,
The windings 18 are simultaneously wound around the corresponding number of magnetic pole teeth portions 14 by a number of winding nozzles so as not to cut the crossover lines, and the state shown in FIG. 8 is obtained. At the time of this winding, the ends of the winding 18 are connected before and after the winding operation.
11 are hooked on the two projections 27, 27 respectively. Finally, as shown in FIG. 9, in the state shown in FIG. 8, each of the pole pieces 14 is bent in an annular shape such that the magnetic pole teeth 14 are on the inside, and then the thin portions 13 are cut to form the two band-shaped portions 1.
When 1 and 11 are removed, a plurality of stators are completed at the same time.

As described above, according to the third embodiment, when the winding 18 is wound, the winding is simultaneously wound around the plurality of magnetic pole teeth portions 14 so as not to cut the crossover, and the terminal is wound. Before and after the hooking on the two projections 27, 27, respectively, so that it can be separated from the winding device, transported,
Assembling and disconnection can be performed easily and quickly, and connection work of terminal wires at the time of assembling motors etc. becomes easy,
Further, after the magnetic pole teeth 14 are bent into an annular shape such that the magnetic pole teeth 14 are on the inner side, the thin portions 13 are cut to form the two belt-shaped portions 11, 1.
Since 1 is removed, a plurality of stators can be efficiently formed together.

In each of the above-described configurations, the case has been described where each magnetic pole taste portion is projected in the same direction with respect to the yoke portion. However, as shown in FIG. The projecting direction of each magnetic pole taste portion 30 protruding from each of the plurality of connected yoke portions 29 is as follows.
Adjacent steps are staggered in the opposite direction and in the connection direction,
Magnetic pole taste portion 30 protruding from one yoke portion 29
Is the thin portion 28 connected to the other yoke portion 29.
If it is arranged so as to correspond to the position, the yield of the hoop-shaped magnetic member can be improved and the material can be effectively used.

Embodiment 4 FIG. FIG. 11 is a perspective view showing a configuration of a core according to Embodiment 4 of the present invention. FIG.
FIG. 13 is a perspective view showing a method for simultaneously forming a plurality of stators by bending the core in FIG. 11 into an annular shape, and FIG. 13 is a perspective view showing a configuration of the core according to the fourth embodiment of the present invention which is different from that in FIG. 14 is a perspective view showing a configuration of the core according to Embodiment 4 of the present invention which is further different from that in FIG.

In the figure, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description is omitted. Reference numeral 31 denotes a laminated core formed by stacking a plurality of the cores 17 shown in FIG. 1. A predetermined position of each of the band portions 11, 11 and the yoke portion 12 of each core 17 is welded by, for example, a YAG laser or pressed. The thin portion 13 of each core 17 is cut by laser or other machine except for one or a few of the stacked ones, or a machine using a disk cutter. It has been removed by machining.

Then, the laminated core 31 configured as described above is bent in an annular shape such that the magnetic pole teeth 14 are inside as shown in FIG. Thereafter, the remaining thin portion 13 is cut to remove the two belt-shaped portions 11, 11, whereby a plurality of stators are completed at the same time.

As described above, according to Embodiment 4, a plurality of cores 17 similar to those in Embodiment 1 are integrated by stacking and fixing them by welding. Laminated core 3 that can be easily and quickly transported and assembled
1 can be easily obtained, and the thin portion 1 of each core 17 can be obtained.
Since one or a few of the ends of 3 are removed to remove the others, even when applied to a multi-layer laminated core, bending and separation of the band-shaped portion 11 can be easily performed with a small force. It becomes possible.

In FIG. 11, a plurality of cores 17 are stacked, fixed by welding and integrated to form a laminated core 31.
Is formed, and other portions are removed while leaving a part of the thin portion 13 of each core 17, but FIG.
As shown in FIG. 3, the yoke part 32 and the magnetic pole taste part 33
, A plurality of blocks 34 are stacked and integrated while being pressed by a press machine, and each thin portion 3 of a pair of band-shaped members 36, 36 having a plurality of thin portions 35 on one side.
5 and fixed by welding to integrate the core 37
It is needless to say that the same effect can be obtained as a matter of course.

As shown in FIG. 14 (A), a pair of strips 38, 38 extending in parallel,
First yoke portions 40 connected via thin portions 39 at predetermined intervals in the extending direction of 8 and 38, and second thin portions 41 branching from the thin portions 39 to these first yoke portions 40, respectively. And a plurality of magnetic pole teeth 43 projecting symmetrically from the paired first and second yoke portions 40 and 42 in directions facing each other. Then, the hoop-shaped magnetic member is press-punched, and the second thin portion 41 is bent as shown in FIG. 14B, and the first and second yoke portions 40 and 42 are formed.
By stacking them so that the shapes of the cores coincide with each other, it is possible to obtain the laminated cores 44 stacked from the hoop-shaped magnetic member with good yield.

[0044]

As described above, according to the first aspect of the present invention, a pair of strips extending in parallel with each other and connected to each other via a thin portion between the strips, and the extension of the strips. Pressing and punching a hoop-shaped magnetic member from a plurality of yoke portions arranged at predetermined intervals in the direction and a plurality of magnetic pole teeth portions projecting from the yoke portion at predetermined intervals in parallel with the band-shaped portion. Therefore, it is possible to provide a core that can be easily and quickly attached to and detached from the winding device and transported.

According to the second aspect of the present invention, in the first aspect, the notches are formed at predetermined intervals in the extending direction at the opposing positions of the two band-shaped portions, so that the notches can be attached to and detached from the winding device. It is possible to provide a core capable of easily and quickly carrying, as well as easily obtaining a pallet-shaped core.

According to a third aspect of the present invention, in the first aspect, a bent edge is formed at the tip of each of the magnetic pole teeth, so that attachment / detachment to the winding device and conveyance are possible. As a matter of course, it is possible to provide a core that can easily and quickly perform, and that can sufficiently secure the area of the magnetic pole without lamination.

According to the fourth aspect of the present invention, since the folded portion is formed in a predetermined area beside each of the magnetic pole teeth, it is possible to easily and quickly perform attachment / detachment to the winding device and transfer. Needless to say, it is possible to provide a core that can secure a desired magnetic path without lamination.

According to the fifth aspect of the present invention, in the first aspect, the projection is formed in the vicinity of the connection between the thin portions of the two belt-shaped portions, so that attachment / detachment to / from the winding device and transportation are easy. As a matter of course, it is possible to provide a core that can be quickly performed and that can easily connect terminal wires at the time of assembly.

According to a sixth aspect of the present invention, in the first aspect, a plurality of the yoke portions are connected to each other via a thin portion for each stage, and the protruding directions of the magnetic pole teeth portions are adjacent to each other. In addition, since it is formed oppositely and alternately in the connection direction, it is possible to easily and quickly perform attachment and detachment and transfer to and from the winding device, and also to improve the yield of the hoop-shaped magnetic member. A possible core can be provided.

According to a seventh aspect of the present invention, in the first aspect, a pair of belt-like portions extending in parallel with each other are connected via a thin portion between the two belt-like portions, and the extension of the belt-like portions is provided. A plurality of yoke portions arranged at predetermined intervals in the direction,
A step of forming a plurality of magnetic pole teeth projecting from the yoke part in parallel with the band-shaped part at a predetermined interval by press-punching a hoop-shaped magnetic member; and twisting the thin part to form each yoke part and each magnetic pole. Includes the step of erecting the taste part and the step of winding the winding around each erect pole taste part, so that the winding operation of the winding around the magnetic pole taste part becomes easy, and the core suitable for mass production assembly Can be provided.

According to the eighth aspect of the present invention, a pair of strips extending in parallel with each other are connected to each other via a thin portion between the strips, and have a predetermined interval in the extending direction of the strips. Forming a plurality of yoke portions arranged in a plurality of steps, and a plurality of magnetic pole taste portions projecting from the yoke portion in parallel with the band-shaped portion at predetermined intervals, by pressing and punching a hoop-shaped magnetic member; Erecting each yoke portion and each magnetic pole taste portion by twisting the thin portion, winding a winding around each erect magnetic pole taste portion, and twisting the thin portion in reverse And the step of returning each of the magnetic pole teeth to the original state and the step of bending each of the yoke portions into a square wave shape so that the widthwise surfaces of each of the magnetic pole teeth each face in parallel. , Magnetic pole taste The wire winding work is facilitated and becomes of course be suitable for mass production assembly, it is possible to provide a manufacturing method of a core that can be easily obtained a compact step motor stator.

According to the ninth aspect of the present invention, a pair of strips extending in parallel with each other are connected to each other through a thin portion between the two strips and have a predetermined interval in the extending direction of the strips. Forming a plurality of yoke portions arranged in a plurality of steps, and a plurality of magnetic pole taste portions projecting from the yoke portion in parallel with the band-shaped portion at predetermined intervals, by pressing and punching a hoop-shaped magnetic member; A step of erecting each yoke part and each magnetic pole taste part by twisting the thin part, a step of winding a winding around each erect magnetic pole taste part, and bending each thin part to form each magnetic pole taste part. And the step of forming a ring on the inner side is included, so that the winding operation of the winding around the magnetic pole teeth is facilitated, which is suitable for mass production assembly, and of course, a plurality of stators can be simultaneously and efficiently used. Can be formed It is possible to provide a manufacturing method of A.

According to a tenth aspect of the present invention, in any one of the seventh to ninth aspects, the winding of the winding is performed without cutting the crossover, so that the winding to the magnetic pole tee portion can be performed. It is possible to provide a method for manufacturing a core that can be easily separated from the winding device, transported, and separated, as well as the winding operation of the core is easy.

According to the eleventh aspect of the present invention, a pair of strips extending in parallel with each other are connected to each other via a thin portion between the strips, and have a predetermined interval in the extending direction of the strips. A core formed by press-punching a hoop-shaped magnetic member into a plurality of yoke portions arranged in a plurality of steps, and a plurality of magnetic pole taste portions projecting from the yoke portion at predetermined intervals in parallel with the band-shaped portion. Since a plurality of sheets are stacked, it is possible to provide a laminated core that can be easily and quickly attached to and detached from and transported to the winding device.

According to the twelfth aspect of the present invention, in the eleventh aspect, the thin portion is removed while leaving a part of the core, so that it can be easily and quickly attached to and detached from the winding device. As a matter of course, it is possible to provide a laminated core in which the strips can be easily separated.

According to the thirteenth aspect of the present invention, since each core is fixed by crimping or welding in the eleventh or twelfth aspect, it is possible to easily and quickly attach and detach the core to and from the winding device. Of course it is possible,
A laminated core in which integration of the core is easy can be provided.

According to the fourteenth aspect of the present invention, a plurality of first strips extending in parallel with each other and a plurality of first strips connected at predetermined intervals in the extending direction of the two strips are provided. A first yoke portion, a second yoke portion connected to each first yoke portion via a second thin portion branching from the thin portion, and a pair of first and second yoke portions. A plurality of magnetic pole teeth that project symmetrically in parallel with and opposite to each other are formed by stamping out a hoop-shaped magnetic member, facilitating attachment and detachment to and transport from the winding device. In addition, it is possible to provide a core which can be stacked quickly and can be easily laminated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a core according to Embodiment 1 of the present invention.

FIG. 2 is a perspective view showing a configuration of a pallet-shaped core shown in FIG.

FIG. 3 is a perspective view showing a method of applying a winding to the core shown in FIG. 2;

FIG. 4 is a perspective view showing a configuration of a core on which a winding is applied in FIG. 3;

FIG. 5 is a perspective view showing a configuration of a core according to a second embodiment of the present invention.

FIG. 6 is a perspective view showing details of a main part of a core in FIG. 5;

FIG. 7 is a perspective view showing a configuration of a step motor to which the core in FIG. 5 is applied.

FIG. 8 is a perspective view showing a configuration of a core according to Embodiment 3 of the present invention in a state where windings are wound.

FIG. 9 is a perspective view showing a method of simultaneously forming a plurality of stators by bending the core in FIG. 8 into an annular shape.

FIG. 10 is a perspective view showing a configuration of a core according to a third embodiment of the present invention which is different from that in FIG. 8;

FIG. 11 is a perspective view showing a configuration of a core according to a fourth embodiment of the present invention.

12 is a perspective view showing a method of simultaneously forming a plurality of stators by bending the core in FIG. 11 into an annular shape.

FIG. 13 is a perspective view showing a configuration of a core according to a fourth embodiment of the present invention which is different from that in FIG. 11;

FIG. 14 is a perspective view showing a configuration of a core according to a fourth embodiment of the present invention which is further different from that in FIG. 11;

FIG. 15 is a plan view showing a configuration of a conventional step motor.

16 is a cross-sectional view showing a configuration of a main part of the step motor in FIG.

FIG. 17 is a plan view showing a configuration of a conventional thin motor.

18 is a plan view showing the configuration of the thin motor in FIG.

FIG. 19 is a plan view showing a configuration of a connected stator core shown in FIG. 17;

[Explanation of symbols]

11, 38 strip-shaped part, 12, 20, 29, 32 yoke part, 13, 28, 35, 39 thin part, 14, 21, 3
0,33,43 Taste part of magnetic pole, 15 notch, 1
6, 17, 22, 31, 37 cores, 18 windings, 19
Winding device, 19a winding nozzle, 21a bent edge, 2
1b Folded part, 23 substrate, 24 rotor, 25
Ring-shaped magnet, 27 protrusions, 34 blocks, 36 belt-shaped members, 40 first yoke portions, 41 second thin-walled portions,
42 second yoke part, 44 laminated core.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Toshimasa Sanbe 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Satoru Akutsu 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (14)

[Claims] 1. A pair of strips extending parallel to each other, and a plurality of strips connected to each other through a thin portion between the strips and arranged at predetermined intervals in a direction in which the strips extend. A core member formed by press-punching a hoop-shaped magnetic member, wherein the yoke portion and a plurality of magnetic pole taste portions projecting from the yoke portion in parallel with the band-shaped portion at predetermined intervals. 2. The core according to claim 1, wherein cutouts are formed at predetermined positions in the extending direction at opposite positions of both band-shaped portions. 3. The core according to claim 1, wherein a bent edge is formed at a tip of each of the pole teeth portions. 4. A fold portion is formed in a predetermined region beside each of the magnetic pole taste portions.
The described core. 5. The core according to claim 1, wherein a projection is formed in the vicinity of the connection between the thin portions of both band-shaped portions. 6. The yoke portion is connected to a plurality of yoke portions via a thin portion at each stage, and the protruding directions of the magnetic pole taste portions are formed opposite to each other in adjacent stages and alternately formed in the connection direction. The core according to claim 1, wherein: 7. A pair of strips extending parallel to each other, and a plurality of strips connected to each other through a thin portion between the strips and arranged at predetermined intervals in a direction in which the strips extend. Forming a plurality of yoke portions, a plurality of magnetic pole taste portions projecting from the yoke portion in parallel with the band-shaped portion at a predetermined interval by press-punching a hoop-shaped magnetic member, and twisting the thin portion. A step of erecting each of the yoke portions and each of the magnetic pole taste portions, and a step of winding a winding around each of the erect magnetic pole taste portions. 8. A pair of strips extending in parallel with each other, and a plurality of strips are connected between the strips via a thin portion and are arranged at predetermined intervals in a direction in which the strips extend. Forming a plurality of yoke portions, a plurality of magnetic pole taste portions projecting from the yoke portion in parallel with the band-shaped portion at a predetermined interval by press-punching a hoop-shaped magnetic member, and twisting the thin portion. Erecting each yoke portion and each magnetic pole taste portion, winding a winding around each of the erect magnetic pole taste portions, and twisting each of the yoke portions by twisting the thin portion in the opposite direction. And a step of bending each of the yoke portions into a square wave shape so that the widthwise surfaces of each of the magnetic pole taste portions face each other in parallel. Did A method for manufacturing a core, comprising: 9. A pair of strips extending parallel to each other, and a plurality of strips connected between the strips via thin portions and arranged at predetermined intervals in the extending direction of the strips. Forming a plurality of yoke portions, a plurality of magnetic pole taste portions projecting from the yoke portion in parallel with the band-shaped portion at a predetermined interval by press-punching a hoop-shaped magnetic member, and twisting the thin portion. A step of erecting each of the yoke portions and each of the magnetic pole tasting portions, a step of winding a winding around each of the erected magnetic pole tasting portions, and bending each of the thin portions so that each of the magnetic pole tasting portions is inward. And a step of forming an annular shape such that 10. The method for manufacturing a core according to claim 7, wherein the winding of the winding is performed without cutting the crossover. 11. A pair of strips extending parallel to each other, and a plurality of strips connected to each other through a thin portion between the strips at predetermined intervals in the extending direction of the strips. A plurality of cores formed by press-punching a hoop-shaped magnetic member were stacked on a yoke portion and a plurality of magnetic pole taste portions projecting from the yoke portion in parallel with the band-shaped portion at predetermined intervals. A laminated core, characterized in that: 12. The laminated core according to claim 11, wherein the thin portion is removed leaving a part of the core. 13. The method according to claim 11, wherein each core is fixed by crimping or welding.
The laminated core as described. 14. A pair of band-shaped portions extending in parallel, a plurality of first yoke portions connected via thin portions at predetermined intervals in a direction in which the band-shaped portions extend, and each of the first yoke portions. A pair of second yoke portions connected to the yoke portion via a second thin portion branched from the thin portion, and the band-shaped portions symmetrically from the paired first and second yoke portions, respectively. A plurality of magnetic pole taste portions protruding in parallel with each other and in directions facing each other, formed by press punching a hoop-shaped magnetic member.