JPH09308151A - Rotor of magnet generator - Google Patents

Rotor of magnet generator

Info

Publication number
JPH09308151A
JPH09308151A JP8143723A JP14372396A JPH09308151A JP H09308151 A JPH09308151 A JP H09308151A JP 8143723 A JP8143723 A JP 8143723A JP 14372396 A JP14372396 A JP 14372396A JP H09308151 A JPH09308151 A JP H09308151A
Authority
JP
Japan
Prior art keywords
rotor
balance
rotor body
molding
magnet
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.)
Granted
Application number
JP8143723A
Other languages
Japanese (ja)
Other versions
JP3746568B2 (en
Inventor
Kiyoshige Enomoto
清重 榎本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oppama Industry Co Ltd
Original Assignee
Oppama Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oppama Industry Co Ltd filed Critical Oppama Industry Co Ltd
Priority to JP14372396A priority Critical patent/JP3746568B2/en
Publication of JPH09308151A publication Critical patent/JPH09308151A/en
Application granted granted Critical
Publication of JP3746568B2 publication Critical patent/JP3746568B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PROBLEM TO BE SOLVED: To perform the adjustment of the balance of a rotor easily and at low costs without providing the rotor body with at least a pair of balance adjusting holes made in molding of a rotor body, centering upon this center line. SOLUTION: Two pair of balance adjusting holes 4a and 4b are arranged symmetrically about the axis of rotation, on the rotor body 1 of an aluminum die-cast product. These are made in the molding process of aluminum die cast. Such balance adjusting holes 4a and 4b are made in specified depth at die-cast molding by experimentally or logically getting and deciding the unbalance of the weight of each part of the rotor body 1 based on the positions and form of magnet 2 and the magnetic pole 3 and taking the balance of weight, according to this result. Hereby, the balance adjustment of the rotor can be performed easily and at low costs without deteriorating the magnetic property and power generation property.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は、内燃機関の点火
装置などに使用される磁石発電機の回転子に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a magnet generator used for an ignition device of an internal combustion engine.

【0002】[0002]

【従来の技術】従来の磁石発電機の回転子は、例えば磁
石を保持した磁極としてのポールピース部とバランスウ
ェイト部とをコアなどの回転子本体上に別々に構成し、
これらを金型にセットした上でアルミの注湯を行った
り、樹脂モールドを行ったりして成形されている。
2. Description of the Related Art In a rotor of a conventional magneto-generator, for example, a pole piece portion as a magnetic pole holding a magnet and a balance weight portion are separately formed on a rotor body such as a core,
After these are set in a mold, aluminum is poured and resin molding is performed.

【0003】ところが、このような成形品としての磁石
発電機の回転子では、成形金型の出来具合,多数個取り
での型番違い,金型更新などにより回転子本体の回転中
心軸を中心とする重量がアンバランスとなることがあ
る。
However, in the rotor of the magneto-generator as such a molded product, the rotation center axis of the rotor main body is centered due to the condition of the molding die, the difference in model number between multiple cavities, and the renewal of dies. The weight to be applied may be unbalanced.

【0004】一方、前記のような回転子の重量のアンバ
ランスを回避するため、前記金型成形により製品として
得られた回転子をバランス測定器に掛けてバランス判定
をし、アンバランスであると判定された場合には、回転
子本体の所定部位にドリル加工によって穴あけすること
によって、バランス調整を行う方法が広く実施されるに
及んでいる。
On the other hand, in order to avoid the imbalance of the weight of the rotor as described above, the rotor obtained as a product by the die molding is hung on a balance measuring device to determine the balance, and it is determined that there is an imbalance. When the determination is made, a method of performing balance adjustment by drilling a predetermined portion of the rotor body by drilling has been widely practiced.

【0005】[0005]

【発明が解決しようとする課題】しかしながら、かかる
回転子本体に対する後加工の穴あけによるバランス調整
方法にあっては、磁極に穴をあけた場合に、予め計算さ
れて設計,製作された回転子の磁気特性を劣化させてし
まい、発電性能の低下、すなわち発電コイルの出力レベ
ルの低下を招くという問題があった。とりわけ、回転子
本体の回転中心軸を中心として各1組の磁石および磁極
を対称配置したものでは、どうしても構造上このような
問題が生じる場合が多かった。
However, in such a balance adjusting method by making holes in the rotor body by post-processing, the rotor body which is pre-calculated and designed and manufactured when holes are made in the magnetic poles is used. There is a problem that the magnetic characteristics are deteriorated and the power generation performance is lowered, that is, the output level of the power generation coil is lowered. In particular, in the case where one pair of magnets and magnetic poles are symmetrically arranged around the center axis of rotation of the rotor body, such a problem often occurs due to the structure.

【0006】また、前記穴あけ作業ではその穴あけ深さ
を十分に管理しなければならないため、穴あけの作業能
率が悪く、場合によっては誤って必要以上に深い穴をあ
けてしまいバランス調整の失敗を招くなどの課題があっ
た。
Further, in the above-mentioned drilling work, since the drilling depth must be controlled sufficiently, the work efficiency of drilling is poor, and in some cases, a hole is deeper than necessary, resulting in failure of balance adjustment. There was such a problem.

【0007】この発明は前記のような課題を解決するた
めになされたものであり、磁気特性および発電性能の劣
化を生じることなく、回転子のバランス調整を容易かつ
ローコストに実現できる磁石発電機の回転子を提供する
ことを目的とする。
The present invention has been made to solve the above-mentioned problems, and a magnet generator capable of easily and inexpensively adjusting the balance of a rotor without deteriorating magnetic characteristics and power generation performance. The purpose is to provide a rotor.

【0008】[0008]

【課題を解決するための手段】前記のような目的を達成
するために、請求項1の発明にかかる磁石発電機の回転
子は、内燃機関のクランクシャフトに取り付けられて、
発電コイル付近で回転し、かつ磁石および磁極を回転子
本体の外周付近に有し、この回転子本体にはこれの中心
線を中心として、該回転子本体の成形時に作られた少な
くとも一対のバランス調整穴を設けたものである。
In order to achieve the above object, the rotor of the magneto-generator according to the invention of claim 1 is attached to a crankshaft of an internal combustion engine,
The rotor rotates near the generator coil and has a magnet and a magnetic pole near the outer circumference of the rotor body, and the rotor body has at least a pair of balances formed around the center line of the rotor body when the rotor body is molded. It has an adjustment hole.

【0009】また、請求項2の発明にかかる磁石発電機
の回転子は、前記バランス調整穴を、前記回転子本体の
成形時に成形用金型のピンの長さを調整することによっ
て深さを調整したものである。
Further, in the rotor of the magneto-generator according to the second aspect of the present invention, the depth of the balance adjusting hole is adjusted by adjusting the length of the pin of the molding die during molding of the rotor body. It has been adjusted.

【0010】[0010]

【発明の実施の形態】以下に、この発明の実施の一形態
を図について説明する。図1はこの発明の磁石発電機の
回転子を示す正面図であり、同図において、1は非磁性
部材により成形された回転子本体であり、これが例えば
アルミのダイキャストにより成形されている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a rotor of a magneto-generator of the present invention. In FIG. 1, reference numeral 1 denotes a rotor body formed of a non-magnetic member, which is formed by die casting of aluminum, for example.

【0011】また、前記回転子本体1の外周付近には、
この回転子本体1の回転中心軸5を中心として磁石2を
保持した磁極3が点対称配置されている。例えば、これ
らの磁石2および磁極3はダイス金型内にセットされた
上で、アルミの注湯が行われてアルミダイカスト品とし
て形成される。
In the vicinity of the outer periphery of the rotor body 1,
The magnetic poles 3 holding the magnets 2 are arranged point-symmetrically around the rotation center axis 5 of the rotor body 1. For example, the magnet 2 and the magnetic pole 3 are set in a die mold, and then aluminum is poured to form an aluminum die-cast product.

【0012】また、4a,4bはアルミダイカスト品の
前記回転子本体1上であって、前記回転中心軸5を中心
として対称配置された2対のバランス調整穴であり、こ
れらが前記アルミダイカスト成形工程の中で作られてい
る。
Further, 4a and 4b are two pairs of balance adjusting holes on the rotor body 1 of an aluminum die cast product, which are symmetrically arranged about the rotation center axis 5, and these are the aluminum die casting moldings. Made in the process.

【0013】すなわち、このようなバランス調整穴4
a,4bは、磁石2,磁極3の位置や形状などにもとづ
く回転子本体1各部の重量のアンバランスを回転子の設
計段階で実験的にまたは理論的に求めて決定し、この結
果に応じて重量のバランスを取るように、前記ダイカス
ト成形時に所定の深さに形成される。
That is, such a balance adjusting hole 4
a and 4b are determined by experimentally or theoretically determining the unbalance of the weight of each part of the rotor main body 1 based on the positions and shapes of the magnets 2 and magnetic poles 3 at the rotor design stage, and depending on the result. It is formed at a predetermined depth during the die casting so that the weight is balanced.

【0014】そして、このバランス調整穴4a,4bの
深さは、前記ダイカスト成形金型に設けられたピン(図
示しない)の長さを調整することにより形成される。
The depths of the balance adjusting holes 4a and 4b are formed by adjusting the length of a pin (not shown) provided on the die casting mold.

【0015】このため、前記バランス調整穴4a,4b
を形成するためのピンは当初十分に長くされており、こ
のピンによって成形された回転子本体1に得られるバラ
ンス調整穴4a,4bは、図3に示すように深いものと
される。
Therefore, the balance adjusting holes 4a and 4b are provided.
The pin for forming the is initially long enough, and the balance adjusting holes 4a and 4b obtained in the rotor body 1 formed by this pin are deep as shown in FIG.

【0016】一方、前記ダイカスト成形金型の出来具
合,型番違い,金型更新によって成形品として前記回転
子に重量のアンバランスが発生した場合には、前記ピン
を削ることによって、前記成形によって得られるバラン
ス調整穴4a,4bの両方またはいずれか一方の深さを
図4に示すように浅くして、つまり、重量付加を行っ
て、最適のバランス調整を実施できることとなる。
On the other hand, when a weight imbalance occurs in the rotor as a molded product due to the quality of the die-cast molding die, the difference in model number, and the renewal of the die, the pin is cut to obtain the weight by the molding. It is possible to perform optimum balance adjustment by making the depth of both or one of the balance adjustment holes 4a and 4b to be shallow as shown in FIG. 4, that is, by adding weight.

【0017】かくして、このようにして成形された回転
子は、外観に何ら大きな変化が加えられずして、バラン
ス調整されたものとして、金型から抜き取って内燃機関
のクランクシャフトに装着可能となるものである。
Thus, the rotor molded in this way can be taken out of the mold and mounted on the crankshaft of the internal combustion engine without being subjected to any significant change in appearance, and as a balanced adjustment. It is a thing.

【0018】また、前記バランス調整穴4a,4bは磁
石2や磁極3以外の成形品内に設けられるため、磁気抵
抗の増加やこれに伴う発電性能の劣化を未然に回避でき
るものとなる。
Further, since the balance adjusting holes 4a and 4b are provided in the molded product other than the magnet 2 and the magnetic pole 3, it is possible to prevent an increase in magnetic resistance and the accompanying deterioration of the power generation performance.

【0019】なお、前記実施の形態では、前記バランス
調整穴4a,4bを2対設けたものを示したが、一対で
もまた3対以上とすることも任意である。
In the above embodiment, two pairs of balance adjusting holes 4a and 4b are provided, but one pair or three or more pairs may be provided.

【0020】また、図2に示すように、回転子の外周側
に、前記回転中心軸5を中心として、一組の前記磁石2
および磁極3とバランスウェイト5とを点対称配置した
ものにおいて重量バランスをとる場合にも、前記と同様
にしてバランス調整穴4a,4b,4cの形成およびそ
の深さ調整が任意に実施される。
Further, as shown in FIG. 2, a set of the magnets 2 is arranged on the outer peripheral side of the rotor with the rotation center axis 5 as the center.
Also in the case of weight balance in the point symmetrical arrangement of the magnetic pole 3 and the balance weight 5, the balance adjustment holes 4a, 4b and 4c are formed and the depth thereof is arbitrarily adjusted in the same manner as described above.

【0021】[0021]

【発明の効果】以上のように、請求項1の発明によれば
内燃機関のクランクシャフトに取り付けられて、発電コ
イル付近で回転し、かつ磁石および磁極を回転子本体の
外周付近に有し、この回転子本体にはこれの中心線を中
心として、該回転子本体の成形時に作られた少なくとも
一対のバランス調整穴を設けるように構成したので、磁
気特性および発電性能の劣化を生じることなく、回転子
のバランス調整を容易かつローコストに実現できるもの
が得られる効果がある。
As described above, according to the first aspect of the present invention, it is attached to the crankshaft of an internal combustion engine, rotates near the generator coil, and has a magnet and a magnetic pole near the outer periphery of the rotor body. Since the rotor body is configured to have at least a pair of balance adjustment holes formed at the time of molding the rotor body around the center line thereof, magnetic characteristics and power generation performance are not deteriorated, There is an effect that a rotor balance adjustment can be realized easily and at low cost.

【0022】また、請求項2の発明によれば前記バラン
ス調整穴を、前記回転子本体の成形時に成形用金型のピ
ンの長さを調整することによって深さを調整した構成と
することで、磁石や磁極への削穴などの加工処理を施さ
ずに、ダイカスト成形金型におけるピン長さの調整のみ
で、すなわち、成形工程レベルで、回転子の最適のバラ
ンス調整を実現できるという効果が得られる。
According to a second aspect of the present invention, the balance adjusting hole has a depth adjusted by adjusting the length of the pin of the molding die during molding of the rotor body. The effect that the optimum balance adjustment of the rotor can be realized only by adjusting the pin length in the die-casting mold without performing processing such as drilling holes on the magnets and magnetic poles, that is, at the molding process level. can get.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の実施の一形態による磁石発電機の回
転子を示す正面図である。
FIG. 1 is a front view showing a rotor of a magneto generator according to an embodiment of the present invention.

【図2】この発明の実施の他の形態による磁石発電機の
回転子を示す正面図である。
FIG. 2 is a front view showing a rotor of a magnet generator according to another embodiment of the present invention.

【図3】この発明におけるバランス調整穴を示す断面図
である。
FIG. 3 is a sectional view showing a balance adjusting hole in the present invention.

【図4】この発明における他のバランス調整穴を示す断
面図である。
FIG. 4 is a sectional view showing another balance adjustment hole in the present invention.

【符号の説明】[Explanation of symbols]

1 回転子本体 2 磁石 3 磁極 4a,4b,4c バランス調整穴 1 Rotor body 2 Magnet 3 Magnetic pole 4a, 4b, 4c Balance adjustment hole

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 内燃機関のクランクシャフトに取り付け
られて、発電コイル付近で回転し、かつ磁石および磁極
を回転子本体の外周付近に有する磁石発電機の回転子に
おいて、前記回転子本体にはこれの中心線を中心とし
て、該回転子本体の成形時に作られた少なくとも一対の
バランス調整穴が設けられていることを特徴とする磁石
発電機の回転子。
1. A rotor of a magneto-generator mounted on a crankshaft of an internal combustion engine, rotating near a generator coil and having a magnet and a magnetic pole near the outer periphery of the rotor body, wherein the rotor body has A rotor for a magnet generator, wherein at least a pair of balance adjusting holes formed at the time of molding the rotor body are provided around a center line of the rotor.
【請求項2】 前記バランス調整穴は、前記回転子本体
の成形時に成形用金型のピンの長さを調整することによ
って深さが調整されていることを特徴とする請求項1に
記載の磁石発電機の回転子。
2. The depth of the balance adjustment hole is adjusted by adjusting a length of a pin of a molding die when the rotor body is molded. Magnet generator rotor.
JP14372396A 1996-05-14 1996-05-14 Magnet generator rotor Expired - Fee Related JP3746568B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14372396A JP3746568B2 (en) 1996-05-14 1996-05-14 Magnet generator rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14372396A JP3746568B2 (en) 1996-05-14 1996-05-14 Magnet generator rotor

Publications (2)

Publication Number Publication Date
JPH09308151A true JPH09308151A (en) 1997-11-28
JP3746568B2 JP3746568B2 (en) 2006-02-15

Family

ID=15345505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14372396A Expired - Fee Related JP3746568B2 (en) 1996-05-14 1996-05-14 Magnet generator rotor

Country Status (1)

Country Link
JP (1) JP3746568B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653287A (en) * 2013-11-22 2015-05-27 比亚迪股份有限公司 Engine and vehicle with engine
JP5931216B2 (en) * 2012-12-03 2016-06-08 三菱電機株式会社 Rotor for rotating electrical machine and method for manufacturing the same
EP3633832A4 (en) * 2017-05-25 2021-03-10 Mitsui High-Tec, Inc. Rotor core manufacturing method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5931216B2 (en) * 2012-12-03 2016-06-08 三菱電機株式会社 Rotor for rotating electrical machine and method for manufacturing the same
US9825505B2 (en) 2012-12-03 2017-11-21 Mitsubishi Electric Corporation Rotor of rotary electric machine and manufacturing method thereof
CN104653287A (en) * 2013-11-22 2015-05-27 比亚迪股份有限公司 Engine and vehicle with engine
EP3633832A4 (en) * 2017-05-25 2021-03-10 Mitsui High-Tec, Inc. Rotor core manufacturing method

Also Published As

Publication number Publication date
JP3746568B2 (en) 2006-02-15

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