JPH028522Y2 - - Google Patents
Info
- Publication number
- JPH028522Y2 JPH028522Y2 JP6115083U JP6115083U JPH028522Y2 JP H028522 Y2 JPH028522 Y2 JP H028522Y2 JP 6115083 U JP6115083 U JP 6115083U JP 6115083 U JP6115083 U JP 6115083U JP H028522 Y2 JPH028522 Y2 JP H028522Y2
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- magnet
- protection member
- end protection
- yoke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000002788 crimping Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000004323 axial length Effects 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000004512 die casting Methods 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Iron Core Of Rotating Electric Machines (AREA)
Description
【考案の詳細な説明】
本考案は永久磁石型回転子に係り、特にインバ
ータ等の制御装置を介して供給される電源によつ
て駆動され、回転域がかなりの高速にまで及ぶ、
例えば密閉型電動圧縮機等に好適な無刷子電動機
の永久磁石型回転子に係るものである。[Detailed description of the invention] The present invention relates to a permanent magnet rotor, which is driven by a power supply supplied through a control device such as an inverter, and whose rotation range extends to a considerably high speed.
For example, the present invention relates to a permanent magnet rotor of a brushless motor suitable for a hermetic electric compressor or the like.
この種の永久磁石型回転子（以下単に回転子と
称す）の一般的構造は、第１図に示す如く、鉄等
の磁性体にて円筒状に構成されたヨーク１の外周
部に所定の磁極が形成されるように復数個のＣ型
永久磁石（以下単に磁石と称す）２を接着剤等で
固着して円筒状に配置したものである。磁石２の
材料としては、近年に至つてコスト的及び特性的
な見地からフエライト磁石の使用が一般化しつつ
あるが、このフエライト磁石は機械的強度に脆い
という欠点を有しており、従つて高速回転時の遠
心力による破損及び飛散等の危険回避を目的とし
て、磁石２の外周部にはガラス繊維等を巻回した
外周部保護部材３が設けられる。一方密閉型電動
圧縮機に於いては循環冷媒中への異物の混入は禁
物であるにも拘らず、磁石若しくは回転子の製造
時に磁石内部に生じる小さなき裂が回転時の遠心
力若しくは振動等によつて磁石を破損させ、破損
した磁石の微小な欠片が循環冷媒中へ散乱する危
険が存在し、この危険回避を目的として回転子軸
方向両端部には端部保護部材４が設けられる。こ
の端部保護部材４はアルミニウムダイカストによ
り形成され、ヨーク１内部を貫通する複数の連結
部６によつて回転子の軸方向両端に保持されてい
る。 The general structure of this type of permanent magnet rotor (hereinafter simply referred to as a rotor) is that, as shown in Fig. 1, a yoke 1 made of a magnetic material such as iron has a cylindrical shape, and a predetermined yoke is attached to the outer circumference of the yoke 1. A plurality of C-shaped permanent magnets (hereinafter simply referred to as magnets) 2 are fixed with an adhesive or the like and arranged in a cylindrical shape so as to form magnetic poles. As the material for the magnet 2, the use of ferrite magnets has become common in recent years from the viewpoint of cost and characteristics, but this ferrite magnet has the disadvantage of being weak in mechanical strength, and therefore cannot be For the purpose of avoiding risks such as damage and scattering due to centrifugal force during rotation, an outer circumference protection member 3 made of glass fiber or the like is provided on the outer circumference of the magnet 2. On the other hand, in hermetic electric compressors, although it is prohibited to allow foreign matter to enter the circulating refrigerant, small cracks that occur inside the magnets during the manufacture of the magnets or rotor may cause centrifugal force or vibration during rotation. There is a risk that the magnets will be damaged by this, and minute pieces of the damaged magnets will be scattered into the circulating refrigerant.To avoid this risk, end protection members 4 are provided at both ends of the rotor in the axial direction. This end protection member 4 is formed of aluminum die-casting, and is held at both ends of the rotor in the axial direction by a plurality of connecting portions 6 passing through the inside of the yoke 1.
さて上記の如く構成される回転子に於いては、
仮に磁石２の装着後に端部保護部材４を形成した
場合、アルミニウムダイカスト時のヒートシヨツ
クによつて磁石２が急激な熱歪を受け、磁石２に
き裂が生じて破損に至るため、一般に磁石２は端
部保護部材４の形成後に装着される。ところがフ
エライト磁石は焼結時に体積で30〜40％の収縮を
起こすため構成寸法のバラツキが非常に大きく、
例えば焼成したままの状態で軸方向長さＬの公差
は±２％程度も存在する。従つて一般にはヨーク
１の軸方向長さを大き目に設定する等、前記公差
を見込んで回転子寸法の設計がなされるため、材
料コストを不必要に増加させる結果を招いてい
た。また端部保護部材４と磁石２との間には場合
によつて相当大きな間隙が生じるため、この部分
に間隙充填部材１１を設けて磁石２の端部保護の
補強がなされていた。この間隙充填部材１１は熱
硬化性樹脂を充填、硬化する等の手段によつて構
成されるため回転子組み立て工数の増加を来すと
いう欠点があり、また充填ムラのために外周部保
護部材３の装着がし難いという欠点もあつた。 Now, in the rotor configured as above,
If the end protection member 4 is formed after the magnet 2 is attached, the magnet 2 will be subjected to rapid thermal strain due to the heat shock during aluminum die-casting, causing cracks in the magnet 2 and leading to damage. 2 is attached after the end protection member 4 is formed. However, ferrite magnets shrink by 30 to 40% in volume during sintering, resulting in very large variations in component dimensions.
For example, in the as-fired state, the axial length L has a tolerance of about ±2%. Therefore, the dimensions of the rotor are generally designed taking the above-mentioned tolerance into account, such as by setting the axial length of the yoke 1 to be large, resulting in an unnecessary increase in material costs. Further, since a fairly large gap may occur between the end protection member 4 and the magnet 2 in some cases, a gap filling member 11 is provided in this area to reinforce the protection of the end of the magnet 2. Since the gap filling member 11 is constructed by filling and curing thermosetting resin, it has the drawback of increasing the number of man-hours required for assembling the rotor. Another drawback was that it was difficult to install.
上述した磁石寸法のバラツキに対処する手段と
して、磁石２の軸方向長さを予め大き目に構成し
た後、軸方向端部に研磨を施して所定寸法に仕上
げるといつた手段も可能であるが、磁石の加工コ
ストが大幅に増加するため一般に好ましくない。 As a means to deal with the above-mentioned variation in magnet dimensions, it is also possible to make the axial length of the magnet 2 large in advance and then polish the axial end to finish it to a predetermined dimension. This is generally undesirable because it significantly increases the processing cost of the magnet.
本考案は上記欠点に鑑みなされたものであり、
その目的とするところは磁石寸法のバラツキに拘
らず常に完全な磁石の保護構造を得ることにあ
り、以上本考案の実施例を示す図面に従つて説明
を行なう。 This invention was created in view of the above drawbacks,
The purpose is to always obtain a perfect protection structure for the magnet regardless of variations in the magnet dimensions, and the embodiments of the present invention will be described below with reference to the drawings.
第２図は本考案による回転子の一実施例を示す
ものである。図中７は端部保護部材４ａに設けた
凹部であり、円筒状に配置される磁石２との当接
部の全域にわたつて環状に設けられており、さら
に磁石２の軸方向端部が嵌挿可能となるように径
方向に所定の幅を有して構成されるものである。
また８は端部保護部材４ａ及びヨーク１の内部を
各々軸方向に貫通する複数の棒状部材であり、軸
方向両端への突出端９に加締め加工を施すことに
より、端部保護部材４ａを回転子の軸方向両端に
保持するものである。 FIG. 2 shows an embodiment of the rotor according to the present invention. In the figure, 7 is a recess provided in the end protection member 4a, which is provided in an annular shape over the entire area of the contact portion with the cylindrically arranged magnet 2, and furthermore, the axial end of the magnet 2 It is configured to have a predetermined width in the radial direction so that it can be inserted.
Reference numeral 8 denotes a plurality of rod-shaped members that penetrate the end protection member 4a and the inside of the yoke 1 in the axial direction, and the end protection member 4a is secured by crimping the protruding ends 9 toward both ends in the axial direction. It is held at both ends of the rotor in the axial direction.
次に第２図に示す回転子の構成方法を説明する
と、予め棒状部材８が貫通可能な穴部を設けたヨ
ーク１を鉄等の磁性体にて円筒状に構成し、この
ヨーク１の外周部に所定の磁極が形成されるよう
に複数個の磁石２を接着剤等で固着して円筒状に
配置する。しかる後、予め棒状部材８が貫通可能
な穴部を設けた端部保護部材４ａを軸方向両端に
装着し、このとき磁石２の端部がヨーク１の軸方
向端部から突出する場合にはその突出部を凹部７
へ嵌挿する。そして棒状部材８を端部保護部材４
ａ及びヨーク１の穴部へ嵌挿するとともに、突出
端９に加締め加工を施して端部保護部材４ａとヨ
ーク１とを固着し、また磁石２の外周部にガラス
繊維等を巻回して外周部保護部材３を設けて回転
子が完成する。 Next, to explain the method of constructing the rotor shown in FIG. 2, a yoke 1 having a hole through which a rod-shaped member 8 can pass is constructed in a cylindrical shape from a magnetic material such as iron, and the outer circumference of this yoke 1 is A plurality of magnets 2 are fixed with an adhesive or the like and arranged in a cylindrical shape so that predetermined magnetic poles are formed in each part. After that, the end protection member 4a, which has a hole through which the rod-like member 8 can pass, is attached to both axial ends.At this time, if the end of the magnet 2 protrudes from the axial end of the yoke 1, The protruding part is the concave part 7.
Insert into. Then, the rod-shaped member 8 is attached to the end protection member 4.
a and the hole of the yoke 1, the protruding end 9 is crimped to secure the end protection member 4a and the yoke 1, and glass fiber or the like is wound around the outer periphery of the magnet 2. The rotor is completed by providing the outer circumference protection member 3.
上記の如く構成される本考案回転子に於いて
は、例えばヨーク１の軸方向長さを磁石２の長さ
公差の下限値に設定し、磁石２の軸方向両端に位
置する凹部７の一方の底部から他方の底部までの
長さを磁石２の長さ公差の上限値に設定する等の
手段により、磁石２の軸方向両端は常に端部保護
部材４ａによつて覆われることになり、磁石寸法
のバラツキに拘らず常に完全な磁石の保護構造が
得られるものである。尚、端部保護部材４ａ及び
棒状部材８の構成材料としてはアルミニウム合金
等が適し、また棒状部材８の貫通箇所、個数及び
断面形状等は実施例に限定されることなく任意に
設定可能である。さらに凹部７は、軸方向両端に
装着する２つの端部保護部材４ａのうちの片側の
みに設ける構成としてもよい。 In the rotor of the present invention configured as described above, for example, the axial length of the yoke 1 is set to the lower limit of the length tolerance of the magnet 2, and one of the recesses 7 located at both ends of the magnet 2 in the axial direction By setting the length from the bottom of the magnet 2 to the bottom of the other to the upper limit of the length tolerance of the magnet 2, both axial ends of the magnet 2 are always covered by the end protection member 4a, A complete magnet protection structure can always be obtained regardless of variations in magnet dimensions. Note that aluminum alloy or the like is suitable as the constituent material of the end protection member 4a and the rod-shaped member 8, and the penetration points, number, cross-sectional shape, etc. of the rod-shaped member 8 are not limited to the examples and can be arbitrarily set. . Further, the recess 7 may be provided only on one side of the two end protection members 4a attached to both ends in the axial direction.
第３図は本考案による回転子の別の実施例を示
すものであり、複数の棒状部材８ｂを片側の端部
保護部材４ｂと一体に構成したものである。この
場合は片側の端部保護部材４ｂの装着と棒状部材
８ｂの嵌挿が同時に行なえるため、回転子の組み
立て工数が削減できる効果を有するものである。 FIG. 3 shows another embodiment of the rotor according to the present invention, in which a plurality of rod-shaped members 8b are integrated with an end protection member 4b on one side. In this case, the mounting of the end protection member 4b on one side and the insertion and insertion of the rod-shaped member 8b can be performed at the same time, which has the effect of reducing the number of man-hours required for assembling the rotor.
第４図は本考案による回転子のさらに別の実施
例を示すものであり、回転子の軸方向一方端にバ
ランスウエイト１０を有する回転子に対する本考
案の適用例を示すものである。密閉型電動圧縮機
に使用される回転子に於いては、軸方向両端若し
くは一方端に真ちゆう等の高比重材料によるバラ
ンスウエイトを取り付けることにより、負荷の回
転アンバランスの矯正がなされる。第１図に示し
た従来の回転子の場合、端部保護部材４上にバラ
ンスウエイト取り付けのための加締め用ボス等を
一体に設けておき、前記ボスにバランスウエイト
を加締め付けて構成する方法が従来採用されてい
た。第４図に示す本考案による回転子の場合は、
端部保護部材４ａ及びヨーク１の内部を各々軸方
向に貫通する複数の棒状部材８の一部を、予めバ
ランスウエイト１０に設けられた穴部にも貫通さ
せ、軸方向両端への突出端９に加締め加工を施す
ことにより、バランスウエイト１０を回転子の軸
方向端部に保持して構成するものである。第４図
の如く構成することにより、第２図若しくは第３
図の実施例に示した本考案の構造の特徴を利用し
てバランスウエイトの取り付けが容易にに達成さ
れ、しかも従来に於いてアルミニウムダイカスト
と加締め加工の２種類からなる工程が、加締め加
工のみの１工程で達成できる利点を有するもので
ある。 FIG. 4 shows still another embodiment of the rotor according to the present invention, and shows an example of application of the present invention to a rotor having a balance weight 10 at one end in the axial direction of the rotor. In a rotor used in a hermetic electric compressor, the rotational unbalance of the load can be corrected by attaching a balance weight made of a high specific gravity material such as brass to both ends or one end in the axial direction. In the case of the conventional rotor shown in FIG. 1, a crimping boss or the like for attaching a balance weight is integrally provided on the end protection member 4, and the balance weight is crimped to the boss. was previously adopted. In the case of the rotor according to the present invention shown in Fig. 4,
Parts of the plurality of rod-shaped members 8 that pass through the end protection member 4a and the inside of the yoke 1 in the axial direction are also passed through holes previously provided in the balance weight 10, so that the protruding ends 9 toward both ends in the axial direction are formed. The balance weight 10 is held at the axial end of the rotor by crimping. By configuring as shown in Fig. 4,
Utilizing the features of the structure of the present invention shown in the example in the figure, attachment of the balance weight can be easily achieved, and the conventional process of aluminum die-casting and crimping is replaced by crimping. This has the advantage that it can be achieved in only one step.
尚、第４図に示した実施例の応用例としては、
端部保護部材４ａとバランスウエイト１０を高比
重の同一材料で一体に設ける構造等が実施可能で
ある。またバランスウエイトを軸方向両端に有す
る構造の回転子に対しても本考案が適用可能な点
は勿論である。 Incidentally, as an application example of the embodiment shown in Fig. 4,
It is possible to implement a structure in which the end protection member 4a and the balance weight 10 are integrally made of the same material with high specific gravity. It goes without saying that the present invention can also be applied to a rotor having a structure in which balance weights are provided at both ends in the axial direction.
以上説明した如く本考案によれば、永久磁石型
回転子の端部保護部材に於いて、磁石との当接部
に磁石端部が嵌挿可能な凹部を設けたことによ
り、磁石寸法のバラツキに拘らず常に完全な磁石
の保護構造が得られ、間隙充填部材等の補強構造
が不要となつて組み立て工数が削減されるととも
に、材料面に無駄がなく信頼性の高い回転子が構
成できるものである。また端部保護部材、ヨーク
及びバランスウエイトの各々の内部を貫通する棒
状部材の軸方向突出端に加締め加工を施すことに
より、少工数且つ容易にバランスウエイトの取り
付け及び回転子の組み立てが達成され、密閉型電
動圧縮機等に好適な回転子が構成できるものであ
る。 As explained above, according to the present invention, in the end protection member of a permanent magnet type rotor, a recess into which the end of the magnet can be inserted is provided in the contact part with the magnet, thereby preventing variations in magnet dimensions. Regardless of the situation, a complete magnet protection structure can always be obtained, no reinforcing structure such as gap filling members is required, reducing assembly man-hours, and a highly reliable rotor can be constructed with no waste of materials. It is. In addition, by caulking the axially protruding ends of the rod-like members that pass through the interiors of the end protection member, yoke, and balance weight, attachment of the balance weight and assembly of the rotor can be easily accomplished with fewer man-hours. , a rotor suitable for a hermetic electric compressor or the like can be constructed.
第１図は従来の回転子の実施例を示し、ａは平
面半断面図、ｂは正面半断面図、第２図乃至第４
図は本考案による回転子の実施例を示し、第２図
ａは平面半断面図、同図ｂ及び第３図は正面半断
面図、第４図ａは平面図、同図ｂは同図ａをP1
−P2−P3線にて切断して示す正面半断面図であ
る。
１……ヨーク、２……永久磁石、４，４ａ，４
ｂ……端部保護部材、５……シヤフト穴、７……
凹部、８，８ｂ……棒状部材、９……突出端（加
締め部）、１０……バランスウエイト。
FIG. 1 shows an example of a conventional rotor, in which a is a plan half-sectional view, b is a front half-sectional view, and FIGS.
The figures show an embodiment of the rotor according to the present invention, in which Figure 2a is a plan half-sectional view, Figures b and 3 are front half-sectional views, Figure 4a is a plan view, and Figure b is the same figure. a to P 1
It is a front half sectional view cut along the line -P2 - P3 . 1...Yoke, 2...Permanent magnet, 4, 4a, 4
b... End protection member, 5... Shaft hole, 7...
Recessed portion, 8, 8b...rod-shaped member, 9...protruding end (crimping part), 10...balance weight.
Claims (1)
軸方向両端に前記永久磁石の端部保護部材を設
けてなる回転子に於いて、前記端部保護部材は
前記永久磁石との当接部に永久磁石端部が嵌挿
可能な凹部を有しており、前記端部保護部材及
び前記ヨークの内部を各々貫通して軸方向両端
若しくは一方端へ突出する複数の棒状部材の突
出端に加締め加工を施すことにより、前記端部
保護部材を軸方向両端に保持してなることを特
徴とする回転子。 (2) バランスウエイトの内部を貫通する前記棒状
部材によつて、前記バランスウエイトを回転子
の軸方向両端若しくは一方端に保持してなるこ
とを特徴とする実用新案登録請求の範囲第１項
記載の回転子。[Scope of claims for utility model registration] (1) A permanent magnet is placed on the outer periphery of a cylindrical yoke,
In a rotor in which end protection members of the permanent magnet are provided at both ends in the axial direction, the end protection member has a recess into which the end of the permanent magnet can be inserted into the contact portion with the permanent magnet. By crimping the protruding ends of a plurality of rod-shaped members that pass through the end protection member and the inside of the yoke and protrude toward both ends or one end in the axial direction, the end protection member is axially secured. A rotor characterized by being held at both ends in a direction. (2) The balance weight is held at both ends or one end in the axial direction of the rotor by the rod-shaped member passing through the inside of the balance weight, as described in claim 1 of the utility model registration claim. rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6115083U JPS59167459U (en) | 1983-04-22 | 1983-04-22 | rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6115083U JPS59167459U (en) | 1983-04-22 | 1983-04-22 | rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59167459U JPS59167459U (en) | 1984-11-09 |
| JPH028522Y2 true JPH028522Y2 (en) | 1990-02-28 |
Family
ID=30191371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6115083U Granted JPS59167459U (en) | 1983-04-22 | 1983-04-22 | rotor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59167459U (en) |
-
1983
- 1983-04-22 JP JP6115083U patent/JPS59167459U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59167459U (en) | 1984-11-09 |
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