JPS58139666A - Rotor for step motor and manufacture thereof - Google Patents

Rotor for step motor and manufacture thereof

Info

Publication number
JPS58139666A
JPS58139666A JP57020927A JP2092782A JPS58139666A JP S58139666 A JPS58139666 A JP S58139666A JP 57020927 A JP57020927 A JP 57020927A JP 2092782 A JP2092782 A JP 2092782A JP S58139666 A JPS58139666 A JP S58139666A
Authority
JP
Japan
Prior art keywords
rotor
magnet
pinion
lacquer
rotor 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.)
Pending
Application number
JP57020927A
Other languages
Japanese (ja)
Inventor
Teizo Goseki
後関 貞三
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.)
SEIKO KEIYO KOGYO KK
Original Assignee
SEIKO KEIYO KOGYO KK
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 SEIKO KEIYO KOGYO KK filed Critical SEIKO KEIYO KOGYO KK
Priority to JP57020927A priority Critical patent/JPS58139666A/en
Publication of JPS58139666A publication Critical patent/JPS58139666A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

PURPOSE:To prevent the crack or notch of a rotor magnet by coating lacquer on the engaging part of the magnet with a rotor pinion, heating and melting the lacquer and rehardening it. CONSTITUTION:Lacquer solution which is diluted on advance by ethanol anhydride is coated and dried as lacquer A on the engaging hole 2a of a rotor magnet 2 with a rotor pinion 1, which is engaged with the magnet 2. Thereafter, the lacquer A is softened or molten by heating, and the magnet 2 is fixed to the pinion 1 by the bonding strength of the lacquer A. In this manner, extremely fine engaging surface can be bonded and no engaging margin is necessary. Accordingly, the external stress by the engagement is not applied to the magnet 2.

Description

【発明の詳細な説明】 本発明は電子時計等に使用されるステップモータ用ロー
タのロータ磁石と、p−タカナの嵌合、及び固定構造と
その方法に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotor magnet of a rotor for a step motor used in an electronic watch, etc., and a fitting structure and method for fixing a p-takana.

従来、電子時計等に使用されるステップモータは、ロー
タ磁石にサマリュウムコバルト郷の、希土類磁石を使用
しているが、この磁石は割れやすく、ステップモータを
製造する友めKは、ロータ磁石に直接、嵌合の応力が伝
達しない様に1磁石表面に樹脂等の軟弱かつ弾性を有す
る材料を被情して、緩衝材としてロータカナに1 ロー
タ磁石を嵌合し、固定している。又他の方法としては、
ロータ磁石の大径を、ロータカナの嵌合部外径より大き
くして、嵌合応力によるロータ磁石の割れを防止し、か
つロータ磁石の固定手段としては、ロータカナの嵌合部
に、ロータ磁石を保持するための、2個のプツシrt−
嵌合させて、ロータ磁石の両側面を挾持して固定する方
法がある。この場合2個のブツシュの少なくとも1個は
バネ性を具備する事が要求される。又2個のブツシュの
一方をロータカナのカナ部側面で代替えして、ロータの
慣性低下の効果を狙う場合もある。しかしながらいづれ
の方法においてもロータ磁石は、直接、又は間接的に1
外部応力を受けるため、ロータ磁石の割れ又は欠けが発
生し、その防止のためには、ロータ磁石を保持するため
の外部応力は、必然的に制約されるのである。従って大
量にステップモータ用ロータを製造するためには、ロー
タ磁石を固定して、ロータのカナ部に外部から回転力を
与え、ロータカナと、ロータ磁石のユルミトルクを管理
する等の対策も必要である。又ロータの割れ、欠けを防
止するためにロータ磁石をロータカナに単に接着剤で接
着する方法もあるが、電子時計等の小型ロー−において
は、極めて少量の接着剤を更に一定量に保って供給する
必要があシ、自動化が極めて困難で、多大な加工時間を
要する欠点がある。
Conventionally, step motors used in electronic watches, etc. have used rare earth magnets made from samarium cobalt for their rotor magnets, but these magnets are easily broken, so Tomome K, which manufactures step motors, has In order to prevent the stress of fitting from being directly transmitted, a soft and elastic material such as resin is applied to the surface of the first magnet, and the first rotor magnet is fitted and fixed in the rotor pinion as a cushioning material. Also, as another method,
The large diameter of the rotor magnet is made larger than the outer diameter of the fitting part of the rotor pinion to prevent the rotor magnet from cracking due to fitting stress. 2 pushers to hold rt-
There is a method of fitting them together and clamping both sides of the rotor magnet to fix it. In this case, at least one of the two bushings is required to have spring properties. In some cases, one of the two bushings is replaced with the side surface of the pinion part of the rotor pinion, aiming at reducing the inertia of the rotor. However, in either method, the rotor magnet is directly or indirectly
As a result of receiving external stress, cracks or chips occur in the rotor magnet, and in order to prevent this, the external stress for holding the rotor magnet is necessarily limited. Therefore, in order to manufacture rotors for step motors in large quantities, it is necessary to take measures such as fixing the rotor magnet, applying external rotational force to the rotor pinion, and managing the bending torque of the rotor pinion and the rotor magnet. . There is also a method of simply gluing the rotor magnet to the rotor pinion with adhesive to prevent the rotor from cracking or chipping, but for small rotors such as electronic watches, it is necessary to supply a very small amount of adhesive while keeping it constant. However, it is extremely difficult to automate and requires a large amount of processing time.

本発明は上記ロータ磁石の割れ又は欠ける欠点を除去し
、ロータ磁石を強固Kかつ容易にロータカナに固定する
事を目的とし友ものである。
The object of the present invention is to eliminate the above-mentioned defects of cracking or chipping of the rotor magnet, and to fix the rotor magnet firmly and easily to the rotor pinion.

以下本発明のステップモータ用ロータについて一実施例
にもとすき詳細に説明する。第1図は本発明によるステ
ップモータ用ロータの側断面図であシ、1は鋼鉄製のロ
ータカナ、2はロータカナを嵌合する穴2aを有するサ
マリュウムコノ(ルト磁石等の希土類磁石製のロータ磁
石である。ロータカナlはあらかじめ2ツクムを塗布し
たロータ磁石2と嵌合し、しかる後に加熱しロータ磁石
に塗布したラツクムを軟化又は溶融して、ロータ磁石2
をロータカナlに固定したものである。更に詳細に製造
工程を追って説明すると、ロータ磁石2にラツクムを塗
布する場合、ラツクムを無水エタノールで溶解して、希
釈する必要がある。これはロータ磁石2に均一にラツク
ムを塗布するために1豐な◆であシ、ラックが重量比率
で20−以下になる様に無水エタノールで溶解、希釈す
る必要がある。以上の様に無水エタノールで希釈したラ
ック液をロータ磁石2に塗布すれば、1〜2) p m
のラック皮膜を形成する事ができる。塗布したラックは
次に乾燥するのであるが、この場合、自然乾燥が効果を
高める方法として最良であるが、加熱による強制乾燥で
も充分な効果が得られる。以上の工程は、2度以上繰返
す事によって更に厚い皮膜を形成する事が可能である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The rotor for a step motor of the present invention will be described in detail in one embodiment below. FIG. 1 is a side sectional view of a rotor for a step motor according to the present invention, in which 1 is a rotor pinion made of steel, and 2 is a rotor made of a rare earth magnet such as a metal magnet having a hole 2a into which the rotor pinion is fitted. The rotor pinion l is fitted with the rotor magnet 2 coated with 2 tsukum in advance, and then heated to soften or melt the lacquer applied to the rotor magnet, and the rotor magnet 2 is heated.
is fixed to the rotor pinion L. To explain the manufacturing process in more detail, when applying Laccum to the rotor magnet 2, it is necessary to dissolve Laccum in absolute ethanol and dilute it. This is necessary in order to uniformly apply the rackum to the rotor magnet 2, and it is necessary to dissolve and dilute the rack with absolute ethanol so that the weight ratio of the rack is 20 or less. If the rack liquid diluted with absolute ethanol is applied to the rotor magnet 2 as described above, 1 to 2) p m
It is possible to form a rack film of The coated rack is then dried.In this case, natural drying is the best way to increase the effect, but forced drying by heating can also be sufficiently effective. It is possible to form an even thicker film by repeating the above steps two or more times.

次にラックを塗布し乾燥したロータ磁石2にロータカナ
1を嵌合し、更に40℃以上に加熱する。加熱によシ、
ラック皮膜は軟化又は溶融状態になシ、ロータカナlと
、ロータ磁石2の嵌合面に充填されて、ラックの接着力
によシロータ磁石2は、ロータカナ1と強固に固定され
る。この場合加熱温度が高ければ燦時間に目的を達成す
る事が可能であシ、外部加熱の場合、電子時計等の小型
ロータであれば、150℃で5分以内に固定する事も可
能であり、大量生産には極めて有効である。又ロータカ
ナlのロータ磁石2の穴2αと嵌合する部分の径差はロ
ータ磁石2の穴径よシ、2μm−40μm小さくする事
が必要であシ、径差が2μ想以下では磁石割れが発生し
、401℃m以上では、ロータカナ1に対してロータ磁
石2が偏心する場合があシ、又ラックAの接着力を有効
に利用する事が困難な状態になる。第2図、第3図は本
発明の他の実施例であるが、第2図は、ロータカナ11
に対し、ロータ磁石12を保持するために磁石保持枠1
3 、14を具備したものであり、第3図はロータカナ
乙のカナ部側面力αと磁石保持枠るで、ロータ磁石ρを
挾持したものである。この様な構造にすれば、ロータ磁
石12,22は、ロータカナ11 、21との嵌合面に
おけるラツクム1.ム意以外に、磁石保持枠13と、磁
石保持枠14、及び磁石保持枠るとロータカナ21のカ
ナ部側面21αでも同様の効果が得られ、更に強固な固
定が可能である。この場合、磁石保持枠13 。
Next, the rotor pinion 1 is fitted onto the rotor magnet 2 coated with a rack and dried, and further heated to 40° C. or higher. For heating,
The rack coating is in a softened or molten state and is filled into the fitting surfaces of the rotor pinion 1 and the rotor magnet 2, and the rotor magnet 2 is firmly fixed to the rotor pinion 1 by the adhesive force of the rack. In this case, if the heating temperature is high, it is possible to achieve the purpose within the heating time, and in the case of external heating, if it is a small rotor such as an electronic watch, it is possible to fix the rotor at 150°C within 5 minutes. , is extremely effective for mass production. Also, the diameter difference of the part of the rotor pinion L that fits into the hole 2α of the rotor magnet 2 needs to be smaller than the hole diameter of the rotor magnet 2 by 2 μm to 40 μm, and if the diameter difference is less than 2 μm, the magnet may crack. If the temperature exceeds 401° C.m, the rotor magnet 2 may become eccentric with respect to the rotor pinion 1, and it becomes difficult to effectively utilize the adhesive force of the rack A. 2 and 3 show other embodiments of the present invention, FIG. 2 shows the rotor pinion 11
On the other hand, the magnet holding frame 1 is used to hold the rotor magnet 12.
3 and 14, and FIG. 3 shows the rotor magnet ρ held between the side force α of the rotor pinion part O and the magnet holding frame. With such a structure, the rotor magnets 12 and 22 have a lattice 1. In addition to the above, the same effect can be obtained by the magnet holding frame 13, the magnet holding frame 14, and the magnet holding frame and the side surface 21α of the rotor pinion 21, and even stronger fixing is possible. In this case, the magnet holding frame 13.

14及び磁石保持枠nにラツクム1 a ” lを塗布
する方法もあるが、希土類磁石の表面には凹凸があシ、
塗布したラツクムl、ム3は表面張力によシ凹部によシ
多く付着する丸め、磁石保持枠13 、14及び磁石保
持枠23にラツクム1.A3を塗布するよりも、より大
きな固定効果が得られるのである。
There is also a method of applying Ratsukum 1a''l to the magnet holding frame n, but the surface of the rare earth magnet is uneven and
The applied Rakumu 1 and 3 are rounded and adhere to the recesses due to surface tension, and the Rakumu 1. A greater fixing effect can be obtained than by applying A3.

以上述べ丸裸に本発明によるステップモータ用ロータは
、容易に希釈し低粘度溶液が作れ、かつ熱可塑性を有す
るラックを用いているため、ラック塗布及び乾燥後、加
熱工程を設けるのみで、極めて微細な嵌合面の接着を可
能とし、嵌合に際して嵌合代を必要とせず、嵌合による
外部応力がロータ磁石に作用する事なくロータカナに固
定する事が可能であシ、ロータ磁石の割れ、欠けを防止
する極めて有効な製造方法を提供し得るものである。又
本発明によれば、ロータカナにロータ磁石を固定するた
めの補助部材を使用する事なく固定が可能であるため、
電子時計勢で要求される低消費電力化のための低慣性の
ステップモータ用ロータを提供し得る効果も有するもの
である。更に製造工種においても、ステップモータ用ロ
ータヲ構成する部品点数を最少にしかつ、大量に処理す
る事が可能であ夛、安価なステップモータ用ロータを提
供する事が可能である。
As stated above, the step motor rotor according to the present invention can be easily diluted to produce a low viscosity solution, and since it uses a thermoplastic rack, extremely fine particles can be obtained by simply performing a heating process after coating and drying the rack. This enables the mating surface to be bonded securely, does not require a mating margin, and can be fixed to the rotor pinion without external stress due to mating acting on the rotor magnet, which prevents cracking of the rotor magnet. This provides an extremely effective manufacturing method for preventing chipping. Furthermore, according to the present invention, it is possible to fix the rotor magnet to the rotor pinion without using any auxiliary member.
It also has the effect of providing a rotor for a step motor with low inertia to reduce power consumption required by electronic clocks. Furthermore, in the manufacturing process, it is possible to minimize the number of parts constituting the rotor for a step motor, to process a large quantity of the rotor, and to provide a rotor for a step motor at a low cost.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の実施例を示す側断面図、第2図、第3
図はそれぞれ異なる他の実施例を示す側li!#T面図
である。 1 、11 、21・・ロータカナ 2 、12 、22・Φロータ磁石 13、14 、23・・磁石保持枠 第′1図 第2図 フ dし 一14 ■12 73 A+ ■22 23
Figure 1 is a side sectional view showing an embodiment of the present invention, Figures 2 and 3 are
The figures each show a different embodiment of the side li! #It is a T-side view. 1, 11, 21... Rotor pinion 2, 12, 22, Φ rotor magnet 13, 14, 23... Magnet holding frame Figure '1 Figure 2 F 14 ■12 73 A+ ■22 23

Claims (1)

【特許請求の範囲】 (1+  ロータ磁石の、ロータカナとの嵌合部にラッ
クを設け、このラックによシ、前記ロータ磁石を前記ロ
ータカナに固定する構成とした事を特徴とするステップ
モータ用ロータ。 (21ロータ磁石の少なくともロータカナとの嵌合部に
、ラックを塗布する工程と、前記ロータ磁石に1、前記
ロータカナを嵌合する工程と、前記ラックを加熱して溶
融する工程と、前記ラックを再び同化する工程とからな
るステップモータ用ロータの製造方法。
[Scope of Claims] (1+ A rotor for a step motor, characterized in that a rack is provided at the fitting portion of the rotor magnet with the rotor pinion, and the rotor magnet is fixed to the rotor pinion by this rack. (21) a step of applying a rack to at least the fitting portion of the rotor magnet with the rotor pinion; a step of fitting the rotor pinion onto the rotor magnet; a step of heating and melting the rack; A method for manufacturing a rotor for a step motor, comprising the step of re-assimilating the
JP57020927A 1982-02-12 1982-02-12 Rotor for step motor and manufacture thereof Pending JPS58139666A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57020927A JPS58139666A (en) 1982-02-12 1982-02-12 Rotor for step motor and manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57020927A JPS58139666A (en) 1982-02-12 1982-02-12 Rotor for step motor and manufacture thereof

Publications (1)

Publication Number Publication Date
JPS58139666A true JPS58139666A (en) 1983-08-19

Family

ID=12040845

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57020927A Pending JPS58139666A (en) 1982-02-12 1982-02-12 Rotor for step motor and manufacture thereof

Country Status (1)

Country Link
JP (1) JPS58139666A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104767307A (en) * 2010-08-24 2015-07-08 戴森技术有限公司 Rotor for an electrical machine
US10505414B2 (en) 2010-08-24 2019-12-10 Dyson Technology Limited Rotor core assembly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104767307A (en) * 2010-08-24 2015-07-08 戴森技术有限公司 Rotor for an electrical machine
CN104795913A (en) * 2010-08-24 2015-07-22 戴森技术有限公司 Rotor used for motor
US10505414B2 (en) 2010-08-24 2019-12-10 Dyson Technology Limited Rotor core assembly
US10756586B2 (en) 2010-08-24 2020-08-25 Dyson Technology Limited Rotor for an electrical machine

Similar Documents

Publication Publication Date Title
DE102010000972B4 (en) Connecting substrate and elastic wave device using the same
KR910007102A (en) How to combine two bodybuilders
JP2002078257A (en) Motor and rotor thereof
US5161049A (en) Optical isolator and method for preparing same
US3029403A (en) Magnetic core structures
JPS58139666A (en) Rotor for step motor and manufacture thereof
JPS6369734A (en) Method for fixing optical fiber
GB2146566A (en) Electrostatic bonding
JPS6146151A (en) Manufacture of rotor with permanent magnet
US3370350A (en) Method of fastening cores of electromagnetic devices
JPH02206342A (en) Manufacture of rotor member
JP2004157541A (en) Method of manufacturing optical fiber block utilizing silicon glass anodic bonding technique
JP2017098644A (en) Piezoelectric composite substrate and manufacturing method thereof
JPS5935417A (en) Method of producing composite electronic part
JPS58142316A (en) Liquid crystal display element
JPS61236638A (en) Process for fixing cover glass of wrist watch by adhesion
JPH04362921A (en) Manufacture of liquid crystal display element
JPH01232285A (en) Method of adhering watch glass
JPS61127640A (en) Preparation of rod lens
JP2011039366A (en) Laminated body for optical isolator, optical isolator and method of manufacturing those
JPS6168376A (en) Method of bonding ferrite magnet and metal material
JPS61121390A (en) Method of mounting electronic part
JPH0454847A (en) Rotor body
JPS60241757A (en) Manufacture of rotor of stepping motor
JPS58154775A (en) Bonding with heat-curing adhesive in a short time