JP4168487B2

JP4168487B2 - Rotor, electric motor, hermetic compressor

Info

Publication number: JP4168487B2
Application number: JP24312098A
Authority: JP
Inventors: 孝勝波多江; 隆夫澤畑
Original assignee: Panasonic Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; Panasonic Holdings Corp
Priority date: 1998-08-28
Filing date: 1998-08-28
Publication date: 2008-10-22
Anticipated expiration: 2018-08-28
Also published as: JP2000078786A

Description

【０００１】
【発明の属する技術分野】
本発明は電動機、全密閉圧縮機等の回転子に関する。
【０００２】
【従来の技術】
従来、圧縮機等に使用される全密閉型圧縮機用回転子は、図２に示すように鉄板を積層して成る積層コアの外周に磁石を等分に配置し、磁石の外周を覆う非磁性体より成る固定筒と、積層コアの上部及び下部に配置した飛散防止用の端板を備え、この端板に磁性体からなるウエイトを設けた回転子であった。
【０００３】
【発明が解決しようとする課題】
以上のような従来の回転子においては、磁石の外周に配置した固定筒と積層コアの上部及び下部に配置した非磁性体の飛散防止用の端板が一体型でないために部品点数が多く組立性が悪かった。また、使用する材料のコストが高かったことから、近年、コストダウン、及び組立性の改善が強く求められている。
【０００４】
本発明はコストダウン、及び組立性の改善が可能な回転子を提供することを目的とする。
【０００５】
【課題を解決するための手段】
この課題を解決するために本発明は、鉄板を積層して成る積層コアの外周に磁石を配置した回転子部材の外周面及び端面を一体型の封止カバーで覆ったことを特徴とする回転子であり、従来、回転子の主要部品である端板と固定筒を一体にした封止カバーを用いることで、部品点数を減らし、組立工数を減らすことを可能とした。
【０００６】
【発明の実施の形態】
本発明の回転子は鉄板を積層して成る積層コアの外周に磁石を配置した回転子部材の外周面及び端面を一体型の封止カバーで覆っているため、部品点数が少なく、回転子の組立を容易にすることができる。
【０００７】
また、回転子部材の一端面は封止カバーの底面部により覆い、前記回転子部材の他端面は端板により覆ってもよい。回転子部材を側面部と底面部が一体となった封止カバーに上部から圧入し、回転子部材の一端面側と側面側を封止カバーにより固定する。その後、もう一方の端面を端板により固定してもよい。また、封止カバーは非磁性体であってもよい。
【０００８】
さらに、本発明の回転子は回転子封止カバーの底面に積層体のウエイト部を設け、前記封止カバーに面する前記ウエイト部の積層板が非磁性体とすることにより、封止カバーに面する積層板以外の積層体を磁性体としても、ウエイト部に漏れる磁束を抑えることができる。
【０００９】
また、封止カバーの底面にウエイト部を設け、前記封止カバーに面する前記ウエイト部の非磁性体部と前記封止カバーの底面との厚みを０．８mm以上とすることで、前記非磁性体部以外のウエイト部を磁性体としてもウエイト部に漏れる磁束を抑えることができる。
【００１０】
【実施例】
本実施例の回転子は図１に示すように、複数の鉄板を積層した積層コア２１の側面に等間隔で永久磁石２２を配置し、永久磁石２２と積層コア２１を底面と側面とが一体成型した非磁性体カバーにより覆う。しかし、この非磁性体カバー２６では積層コア２１の一端面のみしか覆っておらず、積層コア２１の他端面は非磁性体の端板２３により覆う。
【００１１】
積層コア２１の端部には非磁性体カバー２６、端板２３を介してバランスウエイ２４ａ、２４ｂを固定する。この時、非磁性体カバー２６側のバランスウエイト２４ａは複数の積層板からなるが、非磁性体カバー２６に面する積層板は非磁性体であるステンレス板３０であり、他の積層板は磁性体である鉄板からなる。この時、非磁性体カバー２６とステンレス板３０の厚みを０．８mm以上とするとよい。なお、このような範囲であればステンレス板の枚数は１枚でも複数枚でもよいが、コストを考えれば非磁性体カバー２６とステンレス板との厚みが０．８mm〜１．５mmであることが適している。
【００１２】
次に本実施例の製造方法を以下の通り示す。まず、筒状の側面部と、この筒状の側面部を閉じる底面部が一体となって成型された非磁性体カバー２６に、積層コア２１と永久磁石２２を圧入する。このように永久磁石２２及び積層コア２１を圧入することで、非磁性体カバー２６は引張られ、この反作用により非磁性体カバー２６は永久磁石２２を積層コア２１に押さえ付ける。このようにして積層体コア２１が非磁性体カバー２６の底面に届くまで圧入し、永久磁石２２の固定を行う。そして、非磁性体カバー２６の上部を端板２３によって閉じる。その後、バランスウエイト２４ａを非磁性体カバー２６の底面に、バランスウエイト２４ｂを端板２３に配置し、リベット２３により積層コア２１、バランスウエイト２４ａ、２４ｂ、端板２３、非磁性体カバー２６の底面部を固定して、一体のものとする。
【００１３】
このように、少なくとも非磁性カバーに面する積層板を非磁性体とすることにより、他の積層板を鉄板としても、バランスウエイト２４ａからの磁束漏れを抑えることができる。このように、他の積層板を鉄板とすることでコストダウンを図ることができる。この時、非磁性体カバー２６と、この非磁性体カバー２６に面するバランスウエイト２４ａの非磁性体部との厚みが０．８mm以上であれば、バランスウエイト２４ａからの磁束漏れを抑えることができる。なお、この非磁性体部が０．８mm以上であれば、非磁性体の積層板の枚数を増やしてもよい。
【００１４】
よって、本実施例の回転子は部品点数が少なく組立を容易にする。つまり、この回転子を用いた電動機、全密閉型圧縮機は部品点数が少なくてすむ。
【００１５】
【発明の効果】
本発明によれば、封止カバーにより回転子部材の側面と端面を固定するため、部品点数を減らし、組立を容易にすることができる。
【００１６】
また、本発明によれば、バランスウエイトの一部を非磁性体とすることで、バランスウエイトからの磁束漏れを抑えることができる。
【図面の簡単な説明】
【図１】本発明の実施例の全密閉型圧縮機用回転子を示す図
【図２】従来の全密閉型圧縮機用回転子を示す図
【符号の説明】
２１積層コア
２２磁石
２３端板
２４バランスウエイト
２５リベット
２６非磁性体カバー[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a rotor such as an electric motor and a hermetic compressor .
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a hermetic compressor rotor used in a compressor or the like has a non-circular arrangement of magnets arranged on the outer periphery of a laminated core formed by stacking iron plates as shown in FIG. The rotor was provided with a fixed cylinder made of a magnetic material, and end plates for preventing scattering, which were arranged at the top and bottom of the laminated core, and a weight made of a magnetic material was provided on this end plate.
[0003]
[Problems to be solved by the invention]
In the conventional rotor as described above, the fixed cylinder arranged on the outer periphery of the magnet and the end plate for preventing the scattering of the nonmagnetic material arranged on the upper and lower parts of the laminated core are not integrated, so the number of parts is increased. The nature was bad. In addition, since the cost of the material to be used is high, in recent years, there has been a strong demand for cost reduction and assembly improvement.
[0004]
It is an object of the present invention to provide a rotor capable of reducing costs and improving assemblability.
[0005]
[Means for Solving the Problems]
In order to solve this problem, the present invention is characterized in that the outer peripheral surface and end surface of a rotor member in which magnets are arranged on the outer periphery of a laminated core formed by laminating iron plates are covered with an integral sealing cover. By using a sealing cover that is an element and has been integrated with an end plate, which is a main part of the rotor, and a fixed cylinder, the number of parts can be reduced and the number of assembly steps can be reduced.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
In the rotor of the present invention, the outer peripheral surface and the end surface of the rotor member in which magnets are arranged on the outer periphery of a laminated core formed by stacking iron plates are covered with an integral sealing cover. Assembly can be facilitated.
[0007]
Further, one end surface of the rotor member may be covered with a bottom surface portion of the sealing cover, and the other end surface of the rotor member may be covered with an end plate. The rotor member is press-fitted from above into the sealing cover in which the side surface portion and the bottom surface portion are integrated, and the one end surface side and the side surface side of the rotor member are fixed by the sealing cover. Thereafter, the other end face may be fixed by an end plate. The sealing cover may be a nonmagnetic material.
[0008]
Furthermore, the rotor of the present invention is provided with a weight portion of a laminate on the bottom surface of the rotor sealing cover, and the laminate of the weight portion facing the sealing cover is made of a non-magnetic material. Even if a laminate other than the facing laminate is used as a magnetic body, magnetic flux leaking to the weight portion can be suppressed.
[0009]
Further, a weight portion is provided on the bottom surface of the sealing cover, and the thickness of the nonmagnetic body portion of the weight portion facing the sealing cover and the bottom surface of the sealing cover is 0.8 mm or more, so that the non- Even if the weight part other than the magnetic part is used as a magnetic substance, the magnetic flux leaking to the weight part can be suppressed.
[0010]
【Example】
As shown in FIG. 1, the rotor of this embodiment has permanent magnets 22 arranged at equal intervals on the side surface of a laminated core 21 in which a plurality of iron plates are laminated, and the bottom surface and the side surface of the permanent magnet 22 and the laminated core 21 are integrated. Cover with a molded non-magnetic cover. However, the nonmagnetic cover 26 covers only one end surface of the laminated core 21, and the other end surface of the laminated core 21 is covered with a nonmagnetic end plate 23.
[0011]
The balance ways 24 a and 24 b are fixed to the end portion of the laminated core 21 through the nonmagnetic cover 26 and the end plate 23. At this time, the balance weight 24a on the non-magnetic cover 26 side is composed of a plurality of laminated plates. The laminated plate facing the non-magnetic cover 26 is a non-magnetic stainless plate 30, and the other laminated plates are magnetic. It consists of an iron plate that is the body. At this time, the thickness of the non-magnetic cover 26 and the stainless steel plate 30 is preferably 0.8 mm or more. In this range, the number of stainless steel plates may be one or more, but considering the cost, the thickness of the nonmagnetic cover 26 and the stainless steel plate may be 0.8 mm to 1.5 mm. Is suitable.
[0012]
Next, the manufacturing method of a present Example is shown as follows. First, the laminated core 21 and the permanent magnet 22 are press-fitted into a nonmagnetic cover 26 formed by integrally forming a cylindrical side surface portion and a bottom surface portion that closes the cylindrical side surface portion. By thus pressing the permanent magnets 22 and the laminated core 21, the non-magnetic cover 2 6 is pulled, a non-magnetic material cover 26 by the reaction is presses the permanent magnet 2 2 in the laminated core 21. In this manner, the laminated core 21 is press-fitted until it reaches the bottom surface of the nonmagnetic cover 26, and the permanent magnet 22 is fixed. Then, the upper part of the nonmagnetic cover 26 is closed by the end plate 23. Thereafter, the balance weight 24a is disposed on the bottom surface of the nonmagnetic cover 26 and the balance weight 24b is disposed on the end plate 23. The laminated core 21, balance weights 24a and 24b, the end plate 23, and the bottom surface of the nonmagnetic cover 26 are formed by the rivets 23. The part is fixed and integrated.
[0013]
As described above, by making at least the laminated plate facing the non-magnetic cover into a non-magnetic material, leakage of magnetic flux from the balance weight 24a can be suppressed even if the other laminated plate is an iron plate. Thus, cost reduction can be aimed at by making another laminated plate into an iron plate. At this time, if the thickness of the nonmagnetic body cover 26 and the nonmagnetic body portion of the balance weight 24a facing the nonmagnetic body cover 26 is 0.8 mm or more, magnetic flux leakage from the balance weight 24a can be suppressed. it can. If the non-magnetic part is 0.8 mm or more, the number of non-magnetic laminates may be increased.
[0014]
Therefore, the rotor of this embodiment has a small number of parts and facilitates assembly. That is, an electric motor using this rotor and a hermetic compressor need only a small number of parts.
[0015]
【The invention's effect】
According to the present invention, since the side surface and the end surface of the rotor member are fixed by the sealing cover, the number of parts can be reduced and the assembly can be facilitated.
[0016]
Further, according to the present invention, magnetic flux leakage from the balance weight can be suppressed by making a part of the balance weight a non-magnetic material.
[Brief description of the drawings]
FIG. 1 is a diagram showing a rotor for a hermetic compressor according to an embodiment of the present invention. FIG. 2 is a diagram showing a conventional rotor for a hermetic compressor.
21 Laminated Core 22 Magnet 23 End Plate 24 Balance Weight 25 Rivet 26 Non-magnetic Cover

Claims

An outer peripheral surface and an end surface of a rotor member in which magnets are arranged on the outer periphery of a laminated core formed by stacking iron plates are covered with an integral sealing cover , and one end surface of the rotor member is a sealing cover. The rotor member is covered with a bottom surface, the other end surface of the rotor member is covered with an end plate, and the sealing cover is a non-magnetic rotor. The rotor, wherein the laminate of the weight portion facing the cover is a non-magnetic material, and the other laminate plate of the weight portion is a magnetic material .

An electric motor comprising the rotor according to claim 1.

A hermetic compressor provided with the rotor according to claim 1.