JP3800953B2 - Field core for commutator motor - Google Patents

Field core for commutator motor Download PDF

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Publication number
JP3800953B2
JP3800953B2 JP2000367277A JP2000367277A JP3800953B2 JP 3800953 B2 JP3800953 B2 JP 3800953B2 JP 2000367277 A JP2000367277 A JP 2000367277A JP 2000367277 A JP2000367277 A JP 2000367277A JP 3800953 B2 JP3800953 B2 JP 3800953B2
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Japan
Prior art keywords
caulking
sectional area
magnetic path
path cross
magnetic pole
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Expired - Fee Related
Application number
JP2000367277A
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Japanese (ja)
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JP2002171700A (en
Inventor
眞一 坂本
兼二 品川
陸城 広瀬
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Koki Holdings Co Ltd
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Hitachi Koki Co Ltd
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Publication date
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Priority to JP2000367277A priority Critical patent/JP3800953B2/en
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【０００１】
【発明の属する技術分野】
本発明は鉄板を多数積層してカシメ固着することにより形成する整流子モータ用界磁鉄心に関するものである。
【０００２】
【従来の技術】
従来の整流子モータ用界磁鉄心は、図５に示すように、カシメ凹凸部４、５を介して鉄板１間の隙間をなくして密着積層させることにより形成され、コイル装着時や外枠への界磁鉄心取り付け時の作業に不具合が生じるのを回避するためにカシメ凹凸部４、５が鉄板１の磁極部２及び継鉄部３に設けられている。カシメ凹凸部４、５は、同一形状で形成され個々のカシメ結束力の総和を積層された鉄板１が外力の作用によって容易に分離しない結束力以上にするために必要な面積あるいは深さを有していた。
【０００３】
【発明が解決しようとする課題】
上記した界磁鉄心によると、積層された鉄板１が外力の作用によって容易に分離しない結束力以上にするため必要な面積あるいは深さを有するカシメ凹凸部５が磁路を形成している継鉄部３に設けられているため、カシメ凹凸部５が磁路の障害物となり磁束の流れが妨害されひいてはモータ効率の低下を招くという不具合があった。特に外径４５〜１００ｍｍの小形界磁鉄心においては、磁束密度がほとんど飽和領域に達するまで継鉄部３の磁路断面積を狭くしているため磁路妨害の影響が大きく、磁路妨害によるモータ効率の低下は著しくなるという問題があった。一方、継鉄部３のカシメ凹凸部５をなくすことにより磁路妨害を回避しようとすると、鉄板１が密着固定されず積層した鉄板１がずれたり継鉄部３において隙間が生じ、コイル装着時や外枠への界磁鉄心取り付け時の作業に不具合が生じる。このため、モータ効率を重視する高速回転用の小形モータの積層鉄心に上述のカシメ固定方法を採用することは困難であった。
【０００４】
本発明の目的は、上記した従来技術の欠点をなくし、カシメを用いて鉄板を積層固着してもモータ効率を低下させることのない整流子モータ用界磁鉄心を提供することである。
【０００５】
【課題を解決するための手段】
上記目的は、継鉄部に設けたカシメ凹凸部を磁極部に設けたカシメ凹凸部より小さい寸法ないしは深さの小さい形状とすることで達成される。
【０００６】
【発明の実施の形態】
図１〜図４に本発明整流子モータ用界磁鉄心の一実施形態を示す。図１は整流子モータ用界磁鉄心の平面図、図２はその側面図である。本発明は、例えば４５〜１００ｍｍの鉄心に適用した例を示したものである。
【０００７】
図１に示した鉄心は、図２に示すように多数の鉄板１から構成されている。また、この多数の鉄板１は、対応して積層されていると共に磁極部２及び継鉄部３に設けられたカシメ凹凸部４、５により互いに隣接するもの同士がカシメ固定されている。各カシメ凹凸部４、５による固定は、図３に示したように隣接する鉄板１の一方の凸部６を他方の凹部７に嵌着固定することで達成されている。鉄板１は、図１に示したように、磁極部２に寸法の大きいカシメ凹凸部４を設け、継鉄部３には磁極部２のカシメ凹凸部４よりも寸法の小さい形状のカシメ凹凸部５が設けられているのが特徴であり、この磁極部２及び継鉄部３に設けたカシメ凹凸部４と５とはカシメ結束力が異なるがカシメ結束力の総和は積層された界磁鉄心が外力の作用によって容易に分離しない結束力を確保できる寸法形状となっている。
【０００８】
上記の実施形態によれば、磁路断面積が大きく磁路妨害の影響がほとんどない磁極部２に設けたカシメ凹凸部４の寸法を大きくしカシメ面積を大きくすることにより界磁鉄心の結束力の大部分を受け持たせているので、継鉄部３のカシメ凹凸部５は鉄板１間に隙間が生じない程度の結束力を有するだけの小さい寸法形状で良く、継鉄部３における磁束の流れにほとんど影響を及ぼさなくすることが可能になる。これにより、界磁鉄心の磁路妨害は大幅に低減されモータ効率の低下を最小限にとどめた整流子モータとすることが可能となる。
【０００９】
また、カシメ結束力及び磁束の流れに対する影響はカシメ凹凸部４、５の嵌着枚数によっても変わる。従って、カシメ凹凸部４、５の寸法面積が同一であっても、磁極部２に設置するカシメ凹凸部４の深さを、例えば図３(ａ)に示すように鉄板１の１〜２枚以上と多くして結束力を確保し、継鉄部３に設置するカシメ凹凸部５の深さは磁極部２のカシメ凹凸部４の深さより浅くし、例えば図３(ｂ)に示すように磁束の流れに対する影響の少ない鉄板１の１枚以下にすることでも上記の効果が得られる。
【００１０】
次に本発明界磁鉄心の他の実施形態を図４に示す。図４に示すように、外枠等に界磁鉄心を固定するためのボルト挿通孔８を有する界磁鉄心においては、継鉄部３上の磁路を確保するためにボルト挿通孔８のまわりは局部的に継鉄部３の幅が大きく形成されている。すなわち、図４において磁路aと磁路bの幅の合計が磁路cの幅になるように形成されている。この幅の広い位置を利用し、継鉄部３に設けるカシメ凹凸部５を磁路の中に入らないにボルト挿通孔８に並設させてある。これにより、継鉄部３の磁路妨害が発生しないためモータの効率低下の回避に更に大きな効果が得られる。
【００１１】
【発明の効果】
以上のように本発明によれば、継鉄部に設けられたカシメ凹凸部による磁路の妨害率を最小限にとどめることができ、磁路妨害によるモータ効率の大きな低下を招くことなく鉄心を構成する多数の鉄板同士を多少の外力では分離不能に結束させることができる。
【図面の簡単な説明】
【図１】本発明整流子モータ用界磁鉄心の一実施形態を示す平面図。
【図２】図１の側面図。
【図３】カシメ凹凸部による固定状態の一実施形態を示す部分断面図。
【図４】本発明界磁鉄心の他の実施形態を示す部分拡大平面図。
【図５】従来の整流子モータ用界磁鉄心の一例を示す平面図。
【符号の説明】
１は鉄板、２は磁極、３は継鉄、４、５はカシメ凹凸部、６はカシメ凸部、７はカシメ凹部、８はネジ挿通孔である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a field core for a commutator motor formed by laminating a large number of iron plates and fixing them by caulking.
[0002]
[Prior art]
As shown in FIG. 5, the conventional commutator motor field core is formed by closely laminating the gaps between the iron plates 1 via caulking concave and convex portions 4 and 5, and is attached to the outer frame or when the coil is mounted. In order to avoid the occurrence of problems in the work at the time of attaching the field iron core, the caulking uneven portions 4 and 5 are provided in the magnetic pole portion 2 and the yoke portion 3 of the iron plate 1. The caulking uneven portions 4 and 5 have an area or depth necessary for the iron plate 1 formed in the same shape and having the total sum of the individual caulking bundling forces to be more than the bundling force that is not easily separated by the action of external force. Was.
[0003]
[Problems to be solved by the invention]
According to the above-described field iron core, the caulking uneven part 5 having a necessary area or depth for making the laminated iron plate 1 more than the binding force that is not easily separated by the action of external force forms a magnetic path. Since it is provided in the portion 3, there is a problem that the caulking uneven portion 5 becomes an obstacle to the magnetic path and the flow of magnetic flux is obstructed, resulting in a decrease in motor efficiency. In particular, in a small field core having an outer diameter of 45 to 100 mm, the magnetic path cross-sectional area of the yoke portion 3 is narrowed until the magnetic flux density almost reaches the saturation region. There was a problem that the reduction in motor efficiency was significant. On the other hand, if it is going to avoid magnetic path disturbance by eliminating the caulking uneven part 5 of the yoke part 3, the iron plate 1 will not be fixed tightly, but the laminated iron plate 1 will shift | deviate or a clearance gap will arise in the yoke part 3, and a coil will be attached. Trouble occurs when attaching the field core to the outer frame. For this reason, it has been difficult to employ the above-described caulking fixing method for a laminated core of a small motor for high-speed rotation that places importance on motor efficiency.
[0004]
An object of the present invention is to provide a field core for a commutator motor that eliminates the above-described drawbacks of the prior art and does not reduce motor efficiency even when iron plates are laminated and fixed using caulking.
[0005]
[Means for Solving the Problems]
The above object is achieved by making the caulking uneven portion provided in the yoke portion smaller in size or depth than the caulking uneven portion provided in the magnetic pole portion.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 to 4 show an embodiment of a field core for a commutator motor according to the present invention. 1 is a plan view of a commutator motor field core, and FIG. 2 is a side view thereof. The present invention shows an example applied to an iron core of 45 to 100 mm, for example.
[0007]
The iron core shown in FIG. 1 is composed of a number of iron plates 1 as shown in FIG. In addition, a large number of the iron plates 1 are laminated correspondingly, and those adjacent to each other by caulking uneven portions 4 and 5 provided on the magnetic pole portion 2 and the yoke portion 3 are fixed by caulking. The fixing by the caulking uneven portions 4 and 5 is achieved by fitting and fixing one convex portion 6 of the adjacent iron plate 1 to the other concave portion 7 as shown in FIG. As shown in FIG. 1, the iron plate 1 is provided with a caulking uneven portion 4 having a large dimension in the magnetic pole portion 2, and the caulking uneven portion having a smaller size than the caulking uneven portion 4 of the magnetic pole portion 2 in the yoke portion 3. 5 is provided, and the caulking unevenness portions 4 and 5 provided in the magnetic pole portion 2 and the yoke portion 3 have different caulking binding forces, but the total caulking binding force is a laminated field iron core. However, it has a dimension and shape that can secure a binding force that is not easily separated by the action of an external force.
[0008]
According to the above-described embodiment, the binding force of the field core is increased by increasing the size of the caulking uneven portion 4 provided on the magnetic pole portion 2 having a large magnetic path cross-sectional area and hardly affected by the magnetic path obstruction, thereby increasing the caulking area. Therefore, the caulking uneven portion 5 of the yoke portion 3 may be small in size and shape so as to have a binding force that does not cause a gap between the iron plates 1. It is possible to have little effect on the flow. Thereby, the magnetic path disturbance of the field iron core is greatly reduced, and a commutator motor can be obtained in which the decrease in motor efficiency is minimized.
[0009]
Further, the influence on the caulking binding force and the flow of magnetic flux also varies depending on the number of the caulking uneven portions 4 and 5 to be fitted. Therefore, even if the dimensional areas of the caulking uneven portions 4 and 5 are the same, the depth of the caulking uneven portion 4 installed in the magnetic pole portion 2 is set to 1 to 2 sheets of the iron plate 1 as shown in FIG. The bundling force is secured by increasing the above, and the depth of the caulking uneven portion 5 installed in the yoke portion 3 is made shallower than the depth of the caulking uneven portion 4 of the magnetic pole portion 2, for example as shown in FIG. The effect described above can also be obtained by using one or less iron plates 1 having little influence on the flow of magnetic flux.
[0010]
Next, another embodiment of the field iron core of the present invention is shown in FIG. As shown in FIG. 4, in a field core having a bolt insertion hole 8 for fixing the field core to an outer frame or the like, around the bolt insertion hole 8 in order to secure a magnetic path on the yoke portion 3. Is locally formed with a large width of the yoke part 3. That is, in FIG. 4, the total width of the magnetic path a and the magnetic path b is formed to be the width of the magnetic path c. By using this wide position, the caulking uneven portion 5 provided on the yoke portion 3 is juxtaposed with the bolt insertion hole 8 without entering the magnetic path. Thereby, since the magnetic path obstruction of the yoke part 3 does not occur, an even greater effect can be obtained in avoiding a reduction in motor efficiency.
[0011]
【The invention's effect】
As described above, according to the present invention, the interference rate of the magnetic path due to the caulking uneven portion provided in the yoke portion can be minimized, and the iron core can be disposed without causing a significant decrease in motor efficiency due to the magnetic path interference. A large number of steel plates can be bound together in a non-separable manner with some external force.
[Brief description of the drawings]
FIG. 1 is a plan view showing an embodiment of a field iron core for a commutator motor according to the present invention.
FIG. 2 is a side view of FIG.
FIG. 3 is a partial cross-sectional view showing an embodiment of a fixed state by caulking uneven portions.
FIG. 4 is a partially enlarged plan view showing another embodiment of the field core of the present invention.
FIG. 5 is a plan view showing an example of a conventional commutator motor field core.
[Explanation of symbols]
1 is an iron plate, 2 is a magnetic pole, 3 is a yoke, 4 is a caulking uneven part, 6 is a caulking convex part, 7 is a caulking concave part, and 8 is a screw insertion hole.

Claims (2)

磁路断面積が大きい一対の磁極部及び磁極部間を連結する磁路断面積が磁極部の磁路断面積より小さい継鉄部を有する鉄板を多数積層すると共に磁極部及び継鉄部に設けられたカシメ凹凸部を介して積層方向にカシメることにより形成される２極整流子モータ用界磁鉄心であって、
前記磁路断面積が大きい磁極部に設けられたカシメ凹凸部を磁路断面積が小さい継鉄部に設けられたカシメ凹凸部より大きい寸法とすると共に磁極部のカシメ凹凸部の深さを継鉄部のカシメ凹凸部の深さより深い寸法としたことを特徴とする整流子モータ用界磁鉄心。 A pair of magnetic pole portions having a large magnetic path cross-sectional area and a large number of iron plates having a yoke portion having a magnetic path cross-sectional area that is smaller than the magnetic path cross-sectional area of the magnetic pole portion are laminated and provided on the magnetic pole portion and the yoke portion A magnetic field core for a two-pole commutator motor formed by caulking in the laminating direction via the caulking uneven portion formed,
The caulking uneven portion provided in the magnetic pole portion having a large magnetic path cross-sectional area is made larger than the caulking uneven portion provided in the yoke portion having a small magnetic path cross-sectional area, and the depth of the caulking uneven portion of the magnetic pole portion is continued. A field iron core for a commutator motor, characterized in that the dimension is deeper than the depth of the caulking uneven portion of the iron portion . 磁路断面積が大きい一対の磁極部及び磁極部間を連結する磁路断面積が磁極部の磁路断面積より小さい継鉄部を有する鉄板を多数積層すると共に磁極部及び継鉄部に設けられたカシメ凹凸部を介して積層方向にカシメることにより形成される界磁鉄心を備えた２極整流子モータであって、A large number of iron plates having a large magnetic path cross-sectional area and a magnetic path cross-sectional area connecting the magnetic pole sections with a yoke portion smaller than the magnetic path cross-sectional area of the magnetic pole portion are laminated and provided in the magnetic pole portion and the yoke portion. A two-pole commutator motor provided with a field iron core formed by caulking in the stacking direction via the caulking uneven portion formed,
前記磁路断面積が大きい磁極部に設けられたカシメ凹凸部を磁路断面積が小さい継鉄部に設けられたカシメ凹凸部より大きい寸法とすると共に磁極部のカシメ凹凸部の深さを継鉄部のカシメ凹凸部の深さより深い寸法としたことを特徴とする整流子モータ。The caulking uneven portion provided in the magnetic pole portion having a large magnetic path cross-sectional area is made larger than the caulking uneven portion provided in the yoke portion having a small magnetic path cross-sectional area, and the depth of the caulking uneven portion of the magnetic pole portion is continued. A commutator motor characterized in that the dimensions are deeper than the depth of the caulking uneven portion of the iron portion.
JP2000367277A 2000-12-01 2000-12-01 Field core for commutator motor Expired - Fee Related JP3800953B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004129329A (en) 2002-09-30 2004-04-22 Hitachi Koki Co Ltd Permanent magnet commutator motor
JP4612997B2 (en) * 2003-08-08 2011-01-12 日立アプライアンス株式会社 Commutator motor
JP4700521B2 (en) * 2006-02-27 2011-06-15 三菱電機株式会社 Electric motor and ventilator
JP4716127B2 (en) * 2006-09-04 2011-07-06 日立工機株式会社 Electric tool
JP5113419B2 (en) * 2007-05-07 2013-01-09 日立工機株式会社 Electric tool
JP2010158165A (en) * 2010-04-12 2010-07-15 Hitachi Appliances Inc Commutator motor

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