JP2002186203A - Armature and motor with armature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an armature capable of preventing a crossover from interrupting the winding operation of a coil without need for an additive member such as an insulator, and facilitating winding processing. SOLUTION: This armature comprises an iron core 100 where a plurality of metallic sheets 10 having a plurality of magnetic poles 1 projecting to an inner-periphery side of an annular yoke 2 are layered, and the coils 5 respectively wound around the magnetic poles 1. A recessed part 11 recessed from an inner-periphery side edge of the yoke 2 in the outer-peripheral direction is formed on the metallic thin plate 10 at one end side of the iron core 100, and the crossover 6 bent in the thickness direction of the iron core 100 and connecting the coils 5 with a hooking projection 4 integrally formed with the metallic thin plate 10 is hooked on the outer-peripheral side of the recessed part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an armature incorporated in a motor and a motor using the armature.

[0002]

2. Description of the Related Art A motor such as a DC brushless motor includes a housing and a rotor that is rotatable relative to the housing. A field magnet is mounted on the rotor, and an armature facing the field magnet is mounted on the housing. The armature includes an iron core formed by laminating a plurality of electromagnetic steel sheets, which are thin metal sheets, and a coil wound on the iron core, and the iron core is provided on the inner peripheral side or outer peripheral side of the annular yoke portion. The protruding magnetic pole portion is integrated with the yoke portion, and the coil is wound around the magnetic pole portion as predetermined.

[0003] Generally, motors include an outer rotor type motor in which a rotor is disposed radially outside an armature,
There is an inner rotor type in which a rotor is disposed radially inside an armature. In this inner rotor type motor, when winding the coil around the magnetic pole portion of the armature in a predetermined manner, the crossover connecting the coils is shifted inward in the radial direction, causing a problem in winding the coil.
For this purpose, it has been proposed that a synthetic resin insulator is attached to an iron core, and a connecting portion provided on the insulator is hooked with a crossover of a coil (for example, JP-A-7-79557). ).

Further, there has been proposed a configuration in which a hooking projection is provided on a part of an iron core so that a crossover wire of a coil can be hooked without an insulator (for example, Japanese Patent Application Laid-Open No. H9-1997).
No. 322453).

Hereinafter, the conventional example will be described in detail with reference to FIG. In FIG. 7, the armature according to the conventional example has a substantially T-shape for winding the coil 5 from the inner peripheral side of the annular yoke portion 2.
An iron core 100 is formed by laminating a plurality of ring-shaped metal thin plates 10 having a plurality of protruding magnetic pole portions 1 formed thereon, and an insulating film (not shown) is formed on the surface of the stacked metal thin plates 10. 1, a coil 5 is wound. In particular, from between the magnetic pole portions 1 of the metal thin plate 10 near one end in the thickness direction indicated by the arrow X of the plurality of metal thin plates 10, the inner periphery of the yoke 2 is bottomed and one end outward in the thickness direction. An extending hooking projection 14 is provided to hook the crossover 6 connecting the coils 5 to each other.

The details of the conventional example in which the hooking projection is provided on a part of the iron core have been described above. However, as another conventional example, a part of the metal core of the iron core is further expanded from the inner circumference of the yoke portion to the inner circumference. There has also been proposed a configuration in which a crossover wire of a coil can be hooked up by a hooking projection that protrudes in the direction (for example, Japanese Patent Application Laid-Open No. H08-27138).
000-102203).

[0007]

However, the motor having such an armature has the following problems. First, when using an insulator provided with a hook portion, the number of components of a motor, particularly an armature, increases. In addition, a work for attaching the insulator to the iron core is required, and the number of steps for assembling the motor increases.
In particular, with a small motor, the armature is small and workability deteriorates.

On the other hand, by cutting and raising a part of a metal thin plate of an iron core as in the other examples described as a conventional example,
In the case where the locking projection is formed, the above problem is solved. However, the configuration of the locking projection proposed in the conventional example has the following problems. In other words, on one side, the hooking projection for hooking the crossover of the coil is formed by bending in the thickness direction of the iron core with the inner circumference of the yoke as the base, and the crossover is hooked near this base. Is done. On the other hand, the hooking projection on which the crossover of the coil is hooked is configured to extend in the inner circumferential direction with the inner circumference of the yoke portion as the base, and the crossover is further inward than near the base. Hanged.

[0009] Thus, in the configuration of these conventional examples, when the connecting wire connecting the coils is further deviated radially inward from the inner periphery of the yoke portion, when the coil is to be wound around the magnetic pole portion in a predetermined manner, The crossover line between the hooking projections is located on the magnetic pole part, which causes inconvenience in winding the coil. That is, when performing the work of winding the coil on the magnetic pole part, it is necessary to take measures to prevent the crossover from hindering the work near the yoke part, and the work efficiency is reduced. Therefore, in order to increase work efficiency, it is necessary to reduce the effective radius of coil winding in the radial direction above the magnetic pole part or to reduce the radial width of the yoke part by setting the transition area near the crossover wire processing as the transition part. There is. However, if the winding range of the coil is narrowed or the width of the yoke portion in the radial direction is narrowed, there is a possibility that the magnetic characteristics of the armature may not be sufficiently obtained.

An object of the present invention is to provide a more effective coil winding effective range and a yoke without reducing the working efficiency of winding a coil on a magnetic pole portion by a crossover without providing a new member such as an insulator. It is an object of the present invention to provide an armature capable of obtaining a desired magnetic characteristic by securing the width in the radial direction of the armature, thereby making it possible to configure a small and high-performance motor.

[0011]

An armature according to the present invention comprises an iron core comprising a plurality of thin metal plates laminated, having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a magnetic pole portion. And a coil wound around each of the iron cores, the metal sheet at least on one end side of the iron core is located between the magnetic pole portions, and is recessed in the outer peripheral direction from the inner peripheral ridge of the yoke portion, and the outer peripheral side of the concave portion And a plurality of hooking projections extending outward in the thickness end portion of the iron core and hooked with a crossover connecting the coil.

[0012] With this configuration, since the iron core is provided with the latching projection for latching the crossover of the coil, the insulator, which is conventionally required, becomes unnecessary, and the configuration of the armature can be simplified. Also, the hooking projection on which the crossover wire of the coil is hooked is located at the base of the hooking projection between the inner peripheral side and the outer peripheral side of the yoke portion, and the crossover wire is hooked near this root. . Therefore, the crossover can also be located between the inner peripheral side and the outer peripheral side of the yoke. As a result, when the crossover wire is not located on the magnetic pole portion and the coil is to be wound around the magnetic pole portion in a predetermined manner, the crossover wire does not hinder the winding operation, and the armature assembly operation is easy. become.
Further, it is not necessary to narrow the winding range of the coil or to reduce the radial width of the yoke portion in order to secure the treatment area of the crossover, and obtain sufficient magnetic characteristics of the armature. It becomes possible.

[0013] The armature of the present invention further includes a crossover hooked by a pair of hooking projections arranged on both sides of the magnetic pole portion.
This is a configuration in which the coil located between the pair of hooking projections is located on the outer peripheral side from the end near the yoke portion of the coil.

[0014] With this configuration, the crossover wire is not located in the winding range of the coil on the magnetic pole portion. For this reason, when winding the coil around the magnetic pole portion in a predetermined manner, there is no inconvenience that the winding operation is obstructed by the crossover, and the armature assembling operation is facilitated.

Further, the armature according to the present invention comprises a core formed by laminating a plurality of thin metal plates having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and windings on each of the magnetic pole portions. A metal sheet at at least one end of the core, a concave portion depressed in the inner peripheral direction from the outer peripheral side of the yoke portion, and an inner peripheral side of the concave portion, in the outward direction of the thickness end of the iron core. It is configured to have a plurality of hooking projections extending and hooking a crossover connecting a coil.

According to this configuration, since the hook is provided on the iron core so that the crossover of the coil is hooked, the insulator which is conventionally required becomes unnecessary, and the configuration of the armature can be simplified. Further, the base of the hooking projection on which the crossover wire of the coil is hooked is located near the outer peripheral side of the yoke portion, and the crossover wire is hooked near this root. For this reason, the crossover can also be located on the outer peripheral side with respect to the inner peripheral side of the yoke portion. As a result, when the crossover wire is not located on the magnetic pole portion and the coil is to be wound around the magnetic pole portion in a predetermined manner, the crossover wire does not hinder the winding operation, and the armature assembly operation is easy. become. Further, it is not necessary to narrow the winding range of the coil or to reduce the radial width of the yoke portion in order to secure the treatment area of the crossover, and obtain sufficient magnetic characteristics of the armature. It becomes possible. In addition, since the hooking projection is provided on the outer peripheral side of the iron core, the amount of bending required to hang the crossover wire can be smaller than when the inner peripheral side is used, so that the material has low toughness. And the height of the locking projection can be reduced, so that the motor can be made thinner. Further, since the hooking projection does not protrude further from the yoke portion in the outer peripheral direction, it is not necessary to secure a region in the outer peripheral direction, and the motor can be downsized.

Further, the armature according to the present invention has a structure in which the metal sheet having the latching projections extends to the inner peripheral side or the outer peripheral side of the yoke portion and has a fixing portion for fixing the iron core to the exterior member.

With this configuration, the iron core is conventionally fixed to the exterior member or the like with an adhesive, but the armature is fixed by screwing or the like using a part of the iron core without providing a new fixing member or the like. This makes it possible to improve the assemblability and the reliability with respect to impact, outgassing, etc. simultaneously with the effect of the latching projection.

Further, the armature of the present invention has a configuration in which the thickness of the metal sheet having the locking projection is different from the thickness of the other metal sheets.

According to this configuration, by making the thickness of the metal sheet having the hooking projection thicker than the thicknesses of the other metal sheets, it is possible to increase the strength with which the hooking projection is hooked at the crossover.
Sufficient tension can be applied to the crossover in the wiring work of the crossover, and the reliability of the crossover processing can be improved. In addition, by increasing the thickness of the metal sheet having a fixing portion for fixing the iron core to the exterior member, the strength of the fixing portion can be increased, and the strength of fixing with a screw or the like can be increased. And impact reliability can be improved.

Further, the armature according to the present invention comprises a core formed by laminating a plurality of thin metal plates and having an annular yoke portion and a plurality of protruding magnetic pole portions on the inner peripheral side thereof, and a magnetic pole portion. The coil has a turned coil, and the metal sheet at least on one end side of the iron core has a plurality of hooking projections on which a connecting wire connecting the coil is hooked, and the toughness of the metal sheet having the hooking projections is high. , Which is higher than the toughness of other metal sheets.

With this configuration, even if a core material having low toughness is mainly used to obtain low iron loss characteristics, only a limited number of thin metal sheets that need to be bent or the like are made to have high toughness. Thus, it is possible to form the iron core in a predetermined shape while ensuring low iron loss characteristics.

Further, the armature of the present invention has a structure in which the toughness of the metal sheet having the latching projection is higher than the toughness of other metal sheets.

According to this configuration, even if a core material having low toughness is mainly used to obtain low iron loss characteristics, it is necessary to perform bending processing or the like provided with a locking projection or a fixing portion for fixing to an exterior member. By using only a limited metal sheet as a material having high toughness, it is possible to obtain a predetermined shape while securing low iron loss characteristics of the iron core.

Further, the armature of the present invention is configured such that the metal content of the metal sheet having the latching projections is lower than that of the other metal sheets.

With this configuration, even if an electromagnetic steel sheet having a high silicon content and a low iron loss characteristic is mainly used to obtain a low iron loss characteristic, the fixing portion for fixing to the hooking projection or the exterior member is used. It is necessary to apply a bending process etc.Only a limited metal sheet is made into an electromagnetic steel sheet with a high toughness due to a low silicon content, while maintaining a low iron loss characteristic of the iron core and a predetermined shape. It is possible to

Further, the armature according to the present invention is wound around each of a magnetic core and a core made of a single thin metal plate having an annular yoke and a plurality of magnetic poles protruding on the inner peripheral side thereof. The metal thin plate is located between the magnetic pole portions, the concave portion recessed in the outer peripheral direction from the inner peripheral ridge line of the yoke portion, and on the outer peripheral side of the concave portion, extends outward in the thickness end portion of the iron core, And a plurality of hooking projections on which a connecting wire connecting the coils is hooked.

According to this configuration, since the hook is provided on the iron core so that the crossover of the coil is hooked up, the insulator which has been required conventionally becomes unnecessary, and the configuration of the armature can be simplified. Also, the hooking projection on which the crossover wire of the coil is hooked is located at the base of the hooking projection between the inner peripheral side and the outer peripheral side of the yoke portion, and the crossover wire is hooked near this root. . Therefore, the crossover can also be located between the inner peripheral side and the outer peripheral side of the yoke. As a result, when the connecting wire is not located on the magnetic pole portion and the coil is to be wound around the magnetic pole portion as required, the inconvenience of hindering the winding operation by the connecting wire does not occur, and the armature assembling operation is also performed. It will be easier. Further, it is not necessary to narrow the winding range of the coil or to reduce the radial width of the yoke portion in order to secure the treatment area of the crossover, and obtain sufficient magnetic characteristics of the armature. It becomes possible.

Further, the armature according to the present invention is wound around each of a magnetic core having an annular yoke portion and a plurality of magnetic pole portions protruding from the inner peripheral side thereof, the core being made of a single thin metal plate. The metal thin plate has a concave portion depressed in the inner peripheral direction from the outer peripheral side of the yoke portion, and the inner end side of the concave portion extends outward in the thickness end portion of the iron core to connect the coil. And a plurality of locking projections that are locked.

According to this configuration, since the hook is provided on the iron core for hooking the crossover of the coil, the insulator which has been required conventionally becomes unnecessary, and the configuration of the armature can be simplified. Further, the base of the hooking projection on which the crossover wire of the coil is hooked is located near the outer peripheral side of the yoke portion, and the crossover wire is hooked near this root. For this reason, the crossover can also be located on the outer peripheral side with respect to the inner peripheral side of the yoke portion. As a result, when the crossover wire is not located on the magnetic pole portion and the coil is to be wound around the magnetic pole portion in a predetermined manner, the crossover wire does not hinder the winding operation, and the armature assembly operation is easy. become. Further, it is not necessary to narrow the winding range of the coil or to reduce the radial width of the yoke portion in order to secure the treatment area of the crossover, and obtain sufficient magnetic characteristics of the armature. It becomes possible. In addition, since the hooking projection is provided on the outer peripheral side of the iron core, the amount of bending required to hang the crossover wire is smaller than when it is on the inner peripheral side. However, since the height of the hooking projection can be reduced, the motor can be made thinner. Further, since the hooking projection does not protrude further from the yoke portion in the outer peripheral direction, it is not necessary to secure a region in the outer peripheral direction, and the motor can be downsized.

Further, the motor according to the present invention has an iron core formed by laminating a plurality of thin metal plates and having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and wound around each of the magnetic pole portions. A thin metal plate at least on one end side of the iron core is located between the magnetic pole portions, and is recessed in the outer peripheral direction from the inner peripheral ridge line of the yoke portion; An armature having a plurality of hooking projections extending outward from the end and hooked up with a crossover connecting the coil, or an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof. Having an iron core formed by laminating a plurality of metal thin plates, and a coil wound around each of the magnetic pole portions, wherein the metal thin plate on at least one end side of the iron core extends in the inner circumferential direction from the outer peripheral side of the yoke portion. The thickness of the iron core on the inner side of the recess Extending the end part outer direction, a configuration provided with the armature having a plurality of latching projections connecting wire is hooked to connect the coils.

According to this configuration, since the hook is provided on the iron core so that the crossover of the coil is hooked up, the insulator which is conventionally required is not required, and the configuration of the armature can be simplified. Also, the hooking projection on which the crossover wire of the coil is hooked is located at the base of the hooking projection between the inner peripheral side and the outer peripheral side of the yoke portion, and the crossover wire is hooked near this root. . Therefore, the crossover can also be located between the inner peripheral side and the outer peripheral side of the yoke. As a result, when the crossover wire is not located on the magnetic pole portion and the coil is to be wound around the magnetic pole portion in a predetermined manner, the crossover wire does not hinder the winding operation, and the armature assembly operation is easy. become.
Further, it is not necessary to narrow the winding range of the coil or to reduce the radial width of the yoke portion in order to secure the treatment area of the crossover, and obtain sufficient magnetic characteristics of the armature. It becomes possible. Thereby, the assembling work of the motor is facilitated, and a compact and high-performance motor can be configured.

[0033]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a perspective view showing a main part of an armature according to a first embodiment of the present invention. FIG. 2 is a side sectional view showing a main part of the armature according to the first embodiment of the present invention. In FIG. 1, the armature according to the first embodiment is a thin metal plate having a diameter of 20 mm in which nine substantially T-shaped magnetic pole portions 1 protrude at an inner peripheral side of an annular yoke portion 9 at every 40 degrees. It has an iron core 100 in which a plurality of layers 10 are stacked, and a coil 5 wound around the magnetic pole portion 1. Further, an insulating film (not shown) is formed on the surface of the laminated metal thin plates 10, and each magnetic pole portion of the metal thin plates 10, which is closer to one end in the thickness direction indicated by an arrow X, of the plurality of metal thin plates 10. 1 is provided with a locking projection 4 extending outward from one end in the thickness direction. The hooking projections 4 hook the crossover wires 6 connecting the coils 5 wound around the respective magnetic pole portions 1 to each other. The coil 5 is formed by winding a wire having a fine core made of a conductor such as copper covered with an electrically insulating varnish or the like around each magnetic pole portion 1. The metal thin plate 10 may be any magnetic material that can form a magnetic circuit, but is preferably obtained by punching a silicon steel plate that is easy to plastically process and has relatively small iron loss into a desired shape with a press die. preferable. The insulating film (not shown) is formed by applying an insulating material to the entire surface of the metal sheet 10 so that the thickness of the insulating film (not shown) is such that the current between the coil 5 and the metal sheet 10 can be prevented even when a voltage is applied to the coil 5. Applied to

As shown in FIG. 2, the latching projections 4 are formed on the first metal sheet 10 counted from one end in the thickness direction of the plurality of metal sheets 10 in the following procedure. That is, the first metal thin plate 10 is located at the center between the adjacent magnetic pole portions 1, and has a rectangular projection projection 4 in a radial direction from the outer periphery and the inner periphery of the yoke 2 to the inner periphery in the radial direction. Are prepared, and concave portions 11 extending in the outer peripheral direction are provided at both ends thereof. Using the bottoms of the hooking projections 4 on the outer peripheral sides of the pair of recesses 11 as folds, the roots of the hooking projections 4 are bent outward at one end by approximately 90 degrees. Further, in order to improve the hooking of the crossover 6, the hooking projection 4 is provided with a metal sheet 10
May be bent between the root and the tip of the hooking projection 4 so as to extend outward in the radial direction.

As shown in FIG. 1, the connecting wire 6 hooked by the pair of hooking projections 4 sandwiching the magnetic pole portion 1 is an end of the coil 5 sandwiched by the pair of hooking projections 4 near the yoke portion 2. The crossover wires 6 that are located on the outer peripheral side and that extend between the hooking projections 4 are arranged substantially linearly.

In the first embodiment, by appropriately setting the position of the bottom of the concave portion 11, the crossover 6 is configured not to overlap the end of the coil 5 near the yoke 2.
That is, the base of the hooking projection 4 is located between the inner peripheral side and the outer peripheral side of the yoke part 2, and the crossover wire 6 is hooked near this root. For this reason, the crossover 6 can also be located between the inner peripheral side and the outer peripheral side of the yoke part 2. As a result, the crossover 6 is not located on the magnetic pole portion 1, and the crossover 6 and the coil 5 do not overlap with each other and hinder each other from assembling. As a result, the coil 5 can be wound around the magnetic pole portion 1 in a predetermined manner without considering the crossover 6, so that the armature can be assembled more efficiently than in the conventional configuration.

When the field magnet (not shown) having a high residual magnetic flux density is used for the magnetic path of the yoke 2 connecting the magnetic poles 1, it is necessary to take a sufficiently large magnetic path to avoid saturation. . In this configuration, since it is not necessary to secure a crossover portion between the yoke portion 2 and the coil 5 for wiring the crossover wire 6, the radial width of the yoke portion 2 may be restricted by the crossover portion. Absent. For this reason, a sufficient width in the radial direction of the yoke portion 2 to avoid saturation can be obtained.

In the first embodiment, nine magnetic poles 1 project from the inner side of the yoke 2 at intervals of 40 degrees to a diameter of 20 m.
Although the description has been given of the iron core 100 in which a plurality of m-shaped ring-shaped metal thin plates 10 are stacked, the angle or the number of the magnetic pole portions 1 or the diameter of the yoke portion 2 is not limited thereto.

In the first embodiment, the locking projection 4
The extension direction has been described with the surface of the metal sheet 10 as the bottom surface, and the one end is bent outwardly by about 90 degrees with respect to the bottom surface, but the angle is not limited to this angle. In particular,
The height of the hooking projections 4 can be reduced as much as possible by bending the hooking projections 4 from 180 to 180 degrees.
Can be suppressed as low as possible.
That is, for example, since the hooking projection 4 is provided, the iron core 100
It is possible to suppress the reduction of the wall thickness of the battery.

Although the description has been made of the configuration in which the hooking projections 4 are provided one by one between the pair of magnetic pole portions 1, the same effect can be obtained even if there are a plurality of between the pair of magnetic pole portions 1.

In the above description, the hooking projections 4 are provided on the uppermost metal sheet 10 in the thickness direction. Similar effects can be obtained by providing the hooking projections 4 on the lower layer.

Further, of the plurality of metal sheets 10, the hooking projection 4 is attached to the first metal sheet 10 counted from one end in the thickness direction.
However, the same effect can be obtained even if the hooking projections 4 are provided on a plurality of first thin metal plates counted from one end in the thickness direction.

Although the description has been made of the iron core in which a plurality of thin metal plates are stacked, the same effect can be obtained by providing the same hooking projections even when the iron core is formed of only one thin metal plate.

(Second Embodiment) FIG. 3 is a perspective view showing a main part of an armature according to a second embodiment of the present invention. In FIG. 3, the description of the same configuration as the first embodiment is omitted.

In the second embodiment, the hooking projection 7 cuts and raises a portion located between the magnetic pole portions 1 on the outer peripheral side of the yoke portion 2 of the metal sheet 10 in the uppermost layer in the thickness direction. , Is formed. The hanging projection 7 is bent in the thickness direction with both ends of the bottom of the concave portion 3 provided at both ends of the hanging projection 7. Even when the bending is a shallow angle of about 30 degrees, the hooking projection 7 is on the outer peripheral side, so that the crossover wire 6 can be held with the desired strength. Also, the first
In the same manner as in the first embodiment, the connecting wire 6 does not overlap the end of the coil 5 near the yoke, and the radial width of the yoke 2 is not restricted by the connecting portion. The width of the yoke portion 2 in the radial direction can be made sufficient.
Further, in this configuration, even if the bending angle is small, the crossover 6
Can be secured, the height of the locking projection 7 can be made as low as possible, and the restriction in the thickness direction due to the locking projection 7 can be kept as low as possible. That is, for example, since the hooking projections 7 are provided, it is possible to suppress the thickness of the iron core 100 from being reduced. In addition, since the hooking projection 7 does not protrude further from the outer periphery of the yoke portion 2 in the outer peripheral direction, there is no need to secure a region between the outer casings in the outer peripheral direction, and the motor can be downsized.

Although the description has been given of the configuration in which the hooking projections 7 are provided one by one between the pair of magnetic pole portions 1, the same effect can be obtained even if there are a plurality of between the pair of magnetic pole portions 1.

In the above description, the hooking projections 7 are provided on the uppermost metal thin plate 10 in the thickness direction, but the lowermost layer or the uppermost layer in the thickness direction is the same. The same effect can be obtained by providing the hooking projection 7 in the lower layer.

Further, of the plurality of metal sheets 10, the locking projection 7 is attached to the first metal sheet 10 counted from one end in the thickness direction.
However, the same effect can be obtained by providing the hooking projections 7 on the first plurality of metal thin plates counted from one end in the thickness direction.

Further, although the description has been given of an iron core in which a plurality of thin metal plates are stacked, the same effect can be obtained by providing the same hooking projections even when the iron core is formed of only one thin metal plate.

(Third Embodiment) FIG. 4 is a perspective view showing a main part of an armature according to a third embodiment of the present invention. In FIG. 4, the description of the same configuration as in the first embodiment or the second embodiment is omitted.

As shown in FIG. 4, in the third embodiment, a fixing portion 12 for fixing an armature protruding outward from an iron core 100 is further provided on a thin metal plate 10 having an uppermost latching projection 4. Is formed. Further, the fixing portion 12 for fixing the armature is provided with a through hole 12a, so that the fixing portion 12 can be fastened to an exterior member (not shown) or the like by a screw (not shown).

As described above, in the third embodiment, the first
While maintaining the effect described in the second embodiment or the second embodiment, it is possible to fix the armature by screwing or the like using a part of the iron core 100. Since a simple fixing member is not required, it is possible to improve the assemblability, improve the reliability with respect to outgas or the like that adversely affects the magnetic disk device due to an external impact or an adhesive, and reduce the cost.

By increasing the thickness of the thin metal plate having the uppermost hooking projections 4, the strength of the hooking projections 4 for hooking the crossover wires 6 can be increased. Thus, a sufficient tension can be applied to the crossover 6 so that the reliability of the crossover processing can be improved. Further, the strength of the fixing portion 12 for fixing the iron core 100 to the exterior member can be increased, and the strength for fixing with the screw or the like can be increased. It can be aimed at.

In the third embodiment, the iron core 100 is further placed on the thin metal plate 10 having the uppermost latching projections 4.
Although the description has been made with reference to the configuration in which the fixing portion 12 for fixing the armature protruding outward is formed, the fixing portion 12 may be configured to further protrude inward of the iron core 100 on a thin metal plate,
Similar effects can be obtained.

(Fourth Embodiment) FIG. 5 is a side view of an iron core 100 used in the armature illustrated in FIGS. 1 and 2 for explaining an armature according to a fourth embodiment of the present invention. It is a side sectional view showing a section. The iron core 100 includes a metal thin plate 8 and a metal thin plate 9 which are electromagnetic steel plates, and a hooking projection 90 is provided on the uppermost metal thin plate 9. Hanging projection 90
In order to perform such bending work, the metal sheet 9 needs to have a certain degree of toughness. However,
For example, in the case of a silicon steel sheet suitable for an iron core material, a material having low iron loss characteristics and the like has a high silicon content, and therefore, the toughness tends to be extremely reduced. Thus, in the fourth embodiment, the uppermost thin metal sheet 9 which needs to be high in toughness for bending is formed by, for example, a silicon content of 0.5 to 3% by weight, which is easy to bend. Steel sheet,
The other metal sheet 8 is a silicon steel sheet having low iron loss characteristics and having a silicon content of 5.5 to 7.5% by weight.

As described above, in the fourth embodiment, it is possible to form only the metal sheet 9 that needs to be bent into a predetermined shape while securing the low iron loss characteristics of the iron core 100.

(Fifth Embodiment) FIG. 6 is a side sectional view showing a main part of a motor according to a fifth embodiment of the present invention. Here, an example of an inner rotor type DC brushless motor is described, which is symmetrical about the shaft 24, and FIG. 6 shows only the left side. 6, the motor according to the fifth embodiment includes the annular armature 20 shown in the perspective view of FIG. 1 similar to that described in the first embodiment. And shaft 2
This is a configuration in which the rotor 30 is arranged with the center at 4. Only the uppermost metal sheet of the metal sheet 10 constituting the iron core has
As shown in the third embodiment, it protrudes outward from the iron core,
A fixing portion 12 provided with a through hole 12a is formed. The armature 20 is fixed to a base 29, which is the main body of the motor, via the through holes 12a with mounting screws 26. Further, the shaft 24 is fixed to the base 29, and the rotor 30 freely rotates about the shaft 24. The rotor 30 rotates relative to a base 29 by supporting a magnet 21 as a field magnet by a rotor hub 22 via a thrust plate 23 that supports the rotor 30 from a shaft 24.

Further, as described in the first embodiment, a plurality of hooking projections 4 for hooking the crossover 6 are formed only on the uppermost metal sheet of the metal sheet 10 constituting the iron core. Have been. That is, in the fifth embodiment, the position of the bottom of the concave portion 11 of the armature shown in FIG. 1 is appropriately set so that the crossover wire 6 does not overlap the end of the coil 5 near the yoke. Have been. That is, the hooking projection 4 is provided between the inner peripheral side and the outer peripheral side of the yoke 2 shown in FIG.
Is located, and the crossover 6 is hooked near this root. For this reason, the crossover 6 can also be located between the inner peripheral side and the outer peripheral side of the yoke part 2. As a result, the crossover 6
Are not located on the magnetic pole portion 1 shown in FIG. 1, and the crossover 6 and the coil 5 do not overlap and hinder each other's assembling work. Thus, the coil 5 is attached to the magnetic pole 1 without considering the crossover 6.
Can be wound in a predetermined manner, so that the motor assembling operation can be performed more efficiently than in the conventional configuration.

In the fifth embodiment, the armature 2
Although the armature shown in FIG. 1 has been described as 0, the same effect can be obtained with the armature shown in FIG. 3 described in the second embodiment.

In the fifth embodiment, the armature 2
Reference numeral 0 describes an example in which the motor is fixed to the base 29 which is the main body of the motor with the mounting screw 26 through the through-hole 12a of the uppermost thin metal plate. There is a fixed part 1 on the top metal sheet
It is also possible to fix the armature by other methods without having the two.

Further, the uppermost thin metal sheet 10 requiring high toughness for bending is made of, for example, an easily bent silicon steel sheet having a silicon content of 0.5 to 3% by weight. By using a silicon steel sheet having a low iron loss characteristic and having a silicon content of 5.5 to 7.5% by weight, as described in the fourth embodiment, the metal thin plate 10 has a more effective effect on the machined surface as described in the fourth embodiment. It is a target.

[0063]

As described above, the present invention provides an iron core having a plurality of thin metal plates laminated, having an annular yoke portion and a plurality of protruding magnetic pole portions on the inner peripheral side thereof, and a magnetic pole portion. A coil wound around the core, the metal sheet at least at one end of the iron core is located between the magnetic poles and is recessed in the outer peripheral direction from the inner peripheral ridge of the yoke, and on the outer peripheral side of the concave, The thickness of the iron core extends outward from the end and has a plurality of hooking projections on which the crossovers connecting the coils are hooked, eliminating the need for insulators, which was conventionally required, and simplifying the armature configuration. When trying to wind the coil around the magnetic pole part as required, there is no inconvenience such as hindering the winding operation by the crossover,
The armature has an excellent effect that the armature assembling work is also facilitated, and it is not necessary to reduce the radial width of the yoke portion, and sufficient magnetic characteristics of the armature can be obtained. Can be provided.

The present invention also relates to an iron core having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, the core being formed by stacking a plurality of thin metal plates, and a coil wound around each of the magnetic pole portions. A metal sheet at least on one end side of the iron core, a concave portion depressed in the inner peripheral direction from the outer peripheral side of the yoke portion, and on the inner peripheral side of the concave portion, extending outward in the thickness end portion of the iron core, Has a plurality of hooking projections on which the connecting wires are hooked, thereby eliminating the need for an insulator, which has been required in the past, simplifying the configuration of the armature, and providing a predetermined coil in the magnetic pole portion. When trying to wind the street, there is no inconvenience such as hindering the winding work by the crossover, the armature assembling work is also easy, and it is not necessary to reduce the radial width of the yoke. , Sufficient magnetic properties of the armature The armature has an excellent effect that it can be configured even with a material having low toughness, and the height of the locking projection can be reduced, so that the motor can be made thinner. Can be provided.

The present invention also relates to an iron core having a plurality of thin metal plates laminated, having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a coil wound around each of the magnetic pole portions. The metal sheet at least on one end side of the iron core has a plurality of hooking projections hooked with crossovers connecting the coils, and the toughness of the metal sheet having the hooking projections is different from that of other metal sheets. Because it is higher than the toughness of the sheet, even if the core material with low toughness is mainly used to obtain low iron loss characteristics, only a limited number of thin metal sheets that need to be bent etc. Accordingly, it is possible to provide an armature having an excellent effect that a predetermined shape can be obtained while securing low iron loss characteristics of the iron core.

The present invention also includes an iron core made of a single thin metal plate having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a coil wound around each magnetic pole portion. A thin metal plate is located between the magnetic pole portions, and is recessed in the outer circumferential direction from the inner circumferential ridge of the yoke portion, and on the outer circumferential side of the recess, extends outward in the thickness end portion of the iron core to connect the coil. By having a plurality of hooking projections on which the wire is hooked, the insulator that was required conventionally becomes unnecessary,
The structure of the armature can be simplified, and when winding the coil around the magnetic pole part as required, there is no inconvenience that the winding work is hindered by the crossover, and the armature assembly work is also easier. Further, it is not necessary to reduce the radial width of the yoke portion, and it is possible to provide an armature having an excellent effect that sufficient magnetic characteristics of the armature can be obtained.

The present invention also relates to an iron core comprising a single thin metal plate having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a coil wound around each of the magnetic pole portions. The thin metal plate is provided with a concave portion which is depressed in the inner peripheral direction from the outer peripheral side of the yoke portion, and on the inner peripheral side of the concave portion, extends outward in the thickness end portion of the iron core, and a crossover connecting the coil is hooked. By having a plurality of latching projections, the insulator which was conventionally required becomes unnecessary, and the configuration of the armature can be simplified.When the coil is to be wound around the magnetic pole portion in a predetermined manner, There is no inconvenience such as hindering the winding work by the crossover, and the armature assembly work is also easy,
It is not necessary to reduce the radial width of the yoke, and it is possible to obtain sufficient magnetic characteristics of the armature.
It is possible to provide an armature having an excellent effect that the structure can be made even with a material having low toughness, and the height of the locking projection can be reduced, so that the motor can be made thinner. .

Further, according to the present invention, the configuration including the above-described armature can simplify the configuration of the armature.
Armature assembling work is also facilitated, and as a result, a small-sized, high-performance motor having an excellent effect can be provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of an armature according to a first embodiment of the present invention.

FIG. 2 is a side sectional view showing a main part of the armature according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of an armature according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing a main part of an armature according to a third embodiment of the present invention.

FIG. 5 is a side sectional view showing a main part of an armature according to a fourth embodiment of the present invention.

FIG. 6 is a side sectional view showing a main part of a motor according to a fifth embodiment of the present invention.

FIG. 7 is a perspective view showing a main part of a conventional armature.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic pole part 2 Yoke part 3,11 Concave part 4,7,14,90 Hanging protrusion 5 Coil 6 Crossover 8,9,10 Metal thin plate 12 Fixed part 20 Armature 21 Magnet 22 Rotor hub 23 Thrust plate 24 Shaft 26 Mounting Screw 29 Base 30 Rotor 100 Iron core

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 29/00 H02K 29/00 Z (72) Inventor Kaoru Matsuoka 1006 Kazuma Kazuma, Kadoma, Osaka Prefecture Matsushita Electric Industrial In-house F term (reference) 5H002 AA07 AA09 AE08 5H019 AA07 AA10 CC03 CC07 DD10 EE13 EE14 5H603 AA01 AA09 BB01 BB04 BB10 BB12 CA01 CA05 CB03 CB18 CB22 CB26 CC11 CC17 CD21 CE01 5H604 AA08B01 CC03 CC01

Claims (11)

[Claims] 1. An iron core comprising a plurality of thin metal plates laminated, having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a coil wound around each of the magnetic pole portions. A metal sheet at least on one end side of the iron core, a concave portion located between the magnetic pole portions and depressed in an outer peripheral direction from an inner peripheral ridge line of the yoke portion, and a thickness of the iron core on an outer peripheral side of the concave portion. An armature comprising: a plurality of hooking projections extending outward from an end and hooked with a crossover connecting the coil. 2. The method according to claim 1, wherein the connecting wire hooked by the pair of hooking protrusions disposed on both sides of the magnetic pole portion is moved from an end near the yoke portion of the coil located between the pair of hooking protrusions. The armature according to claim 1, wherein the armature is also located on the outer peripheral side. 3. An iron core formed by laminating a plurality of thin metal plates having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a coil wound around each of the magnetic pole portions. A metal sheet at least on one end side of the iron core, a concave portion depressed in an inner peripheral direction from an outer peripheral side of the yoke portion, and an inner peripheral side of the concave portion extends outward in a thickness end portion of the iron core. An armature having a plurality of hooking projections on which a connecting wire connecting the coil is hooked. 4. The metal sheet having the latching projection,
The armature according to any one of claims 1 to 3, further comprising a fixing portion extending to an inner peripheral side or an outer peripheral side of the yoke section and fixing the iron core to an exterior member. 5. The armature according to claim 4, wherein the thickness of the metal sheet having the engaging projection is different from the thicknesses of the other metal sheets. 6. An iron core formed by laminating a plurality of thin metal plates having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a coil wound around each of the magnetic pole portions. The metal sheet at least on one end side of the iron core has a plurality of hooking projections hooked with a crossover connecting the coil, and the toughness of the metal sheet having the hooking projections is other than that. An armature characterized by being higher in toughness of the metal sheet. 7. The armature according to claim 1, wherein the toughness of the metal sheet having the engaging projection is higher than the toughness of the other metal sheets. 8. The electromagnetic steel sheet according to claim 6, wherein the metal content of the metal sheet having the hooking projection is lower than the silicon content of the other metal sheet.
Armature as described. 9. An iron core comprising a single thin metal plate having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and a coil wound around each of the magnetic pole portions, A concave portion that is located between the magnetic pole portions and is depressed in an outer peripheral direction from an inner peripheral side ridge line of the yoke portion; and, on an outer peripheral side of the concave portion, extends outward in a thickness end portion of the iron core. An armature comprising: a plurality of hooking projections on which a crossover connecting a coil is hooked. 10. An iron core comprising a single thin metal plate having an annular yoke portion and a plurality of magnetic pole portions protruding on the inner peripheral side thereof, and coils wound around each of the magnetic pole portions, The metal thin plate has a concave portion which is depressed in an inner peripheral direction from an outer peripheral side of the yoke portion, and a thickness of the iron core extends outward in an inner peripheral side of the concave portion, and a connecting wire connecting the coil is formed. An armature having a plurality of hooked projections. 11. A motor comprising the armature according to claim 1. Description: