JP2006070918A - Bearing device and method of manufacturing the same - Google Patents

Bearing device and method of manufacturing the same Download PDF

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JP2006070918A
JP2006070918A JP2004251451A JP2004251451A JP2006070918A JP 2006070918 A JP2006070918 A JP 2006070918A JP 2004251451 A JP2004251451 A JP 2004251451A JP 2004251451 A JP2004251451 A JP 2004251451A JP 2006070918 A JP2006070918 A JP 2006070918A
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adhesive
bearing device
rings
preload
peripheral surface
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JP4389729B2 (en
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Koji Yamamoto
晃司 山本
Hiroshi Tani
弘志 谷
Seizo Miyazaki
晴三 宮崎
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NSK Ltd
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NSK Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/30—Material joints
    • F16C2226/40—Material joints with adhesive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive bearing device with high rigidity and low torque variation capable of preventing inner and outer rings from being deformed when a preload is applied thereto and a method of manufacturing the bearing device. <P>SOLUTION: This bearing device 2 comprises rolling bearings 8 and 10 orderly disposed between a hollow shaft 4 and a housing 6 and supporting the housing on the hollow shaft rotatably relative to each other. The rolling bearings comprise inner rings 8a and 10a fixed to the outer peripheral surface of the hollow shaft with an adhesive agent, outer rings 8b and 10b fixed to the inner peripheral surface of the housing with the adhesive agent, and a plurality of rolling elements 8c and 10c rollingly arranged between the inner and outer rings. When a clearance is present in at least one of the areas between the outer peripheral surface of the hollow shaft and the inner rings and between the inner peripheral surface of the housing and the outer rings and a prescribed preload is applied to the rolling bearings, the inner and outer rings are rotated relative to each other to solidify the adhesive agent to a prescribed hardness. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えばＶＴＲ(ビデオテープレコーダ)、テープストリーマ、ＬＢＰ(レーザービームプリンタ)、ＨＤＤ(ハードディスクドライブ)で用いられるスピンドルモータやスイングアームなどに組み込まれる軸受装置及び軸受装置製造方法に関する。   The present invention relates to a bearing device incorporated in, for example, a spindle motor and a swing arm used in a VTR (video tape recorder), a tape streamer, an LBP (laser beam printer), and an HDD (hard disk drive), and a bearing device manufacturing method.

従来、この種のスピンドルモータやスイングアームに組み込まれる軸受装置２は、例えば図３(ａ)に示すように、中空円筒状の中空軸４と、中空軸４を覆うように配置された中空円筒状のハウジング６とを備えており、中空軸４とハウジング６との間に複数(例えば２つ)の転がり軸受8,10が間座１２を介して組み込まれている。   Conventionally, a bearing device 2 incorporated in a spindle motor or a swing arm of this type includes, for example, a hollow cylindrical hollow shaft 4 and a hollow cylinder arranged so as to cover the hollow shaft 4 as shown in FIG. A plurality of (for example, two) rolling bearings 8 and 10 are incorporated between the hollow shaft 4 and the housing 6 via a spacer 12.

各転がり軸受8,10にはそれぞれ、互いに相対回転可能に対向配置された内輪8a,10a及び外輪8b,10bと、内外輪間に転動自在に配列された複数の転動体8c,10cと、内外輪の両側にそれぞれ配置された密封板8d,10dとが設けられており、中空軸４の押圧部４ａにより内輪１０ａ(又は、内輪８ａ)に所定の押圧力を加えることにより、各転がり軸受8,10に所定の予圧が付与され、その状態で内輪１０ａ(又は、内輪８ａ)は中空軸４の外周面に接着剤で固定される。なお、間座１２は、両外輪8b,10b間に隣接して配置され、間座１２と両内輪8a,10aとの間には若干の隙間(予圧付与のための隙間)が形成されている。   Each of the rolling bearings 8 and 10 includes inner rings 8a and 10a and outer rings 8b and 10b that are opposed to each other so as to be relatively rotatable, and a plurality of rolling elements 8c and 10c that are arranged to freely roll between the inner and outer rings, Sealing plates 8d and 10d disposed on both sides of the inner and outer rings are provided, and each rolling bearing is provided by applying a predetermined pressing force to the inner ring 10a (or inner ring 8a) by the pressing portion 4a of the hollow shaft 4. A predetermined preload is applied to 8, 10, and the inner ring 10 a (or the inner ring 8 a) is fixed to the outer peripheral surface of the hollow shaft 4 with an adhesive in that state. The spacer 12 is disposed adjacent to both the outer rings 8b and 10b, and a slight gap (gap for applying preload) is formed between the spacer 12 and the inner rings 8a and 10a. .

ところで、内輪１０ａ(又は、内輪８ａ)を中空軸４の外周面に接着剤で固定する方法には、例えば図３(ｂ)に示すような予圧付与装置が用いられている。予圧付与装置は、ベース１４に固定されたサポート台１６と、サポート台１６の垂直上方に支持フレーム１８で吊り下げ支持された予圧付与ユニット２０とを備えており、サポート台１６の上面(予圧付与ユニット２０に対向した面)には、支持軸２２が突設されている。   Incidentally, as a method of fixing the inner ring 10a (or the inner ring 8a) to the outer peripheral surface of the hollow shaft 4 with an adhesive, for example, a preload applying device as shown in FIG. 3B is used. The preload application device includes a support base 16 fixed to the base 14 and a preload application unit 20 supported by a support frame 18 suspended vertically above the support base 16, and an upper surface of the support base 16 (preload application). A support shaft 22 protrudes from the surface facing the unit 20.

予圧付与ユニット２０には、支持フレーム１８からサポート台１６(支持軸２２)に向けて吊り下げられた支柱２４と、支柱２４の外周に設けられた予圧用コイルばね２６と、予圧用コイルばね２６の上端部を支持し且つ支柱２４に沿ってスライド自在に構成されたスライダ２８と、予圧用コイルばね２６の下端部に設けられた予圧付与体３０とが設けられている。なお、スライダ２８には止めネジ３２が螺合しており、当該止めネジ３２の先端は支柱外周面２４ｓに対して当接可能となっている。この場合、スライダ２８を支柱２４に沿って移動させた後、止めネジ３２を締め込んで先端(止めネジ３２の先端)を支柱２４に圧接させることによりスライダ２８を所望の位置に固定することができる。   The preload applying unit 20 includes a support 24 suspended from the support frame 18 toward the support base 16 (support shaft 22), a preload coil spring 26 provided on the outer periphery of the support 24, and a preload coil spring 26. The slider 28 is configured to support the upper end portion of the preload coil 26 and is slidable along the support column 24, and a preload applying body 30 provided at the lower end portion of the preload coil spring 26. A set screw 32 is screwed onto the slider 28, and the tip of the set screw 32 can come into contact with the outer peripheral surface 24s of the column. In this case, after the slider 28 is moved along the column 24, the slider 28 is fixed at a desired position by tightening the set screw 32 and pressing the tip (tip of the set screw 32) against the column 24. it can.

このような予圧付与装置で軸受装置２に所定の予圧を付与する場合、内輪１０ａが中空軸４の外周面に接着剤で固定される前の状態の軸受装置２をサポート台１６上にセットする。具体的には、軸受装置２の中空軸４をサポート台１６の支持軸２２に外嵌する。支持軸２２の外径は、中空軸４の内径と略一致しているため、中空軸４を支持軸２２に外嵌することにより、軸受装置２をサポート台１６上に鉛直にセットすることができる。   When applying a predetermined preload to the bearing device 2 with such a preload applying device, the bearing device 2 in a state before the inner ring 10 a is fixed to the outer peripheral surface of the hollow shaft 4 with an adhesive is set on the support base 16. . Specifically, the hollow shaft 4 of the bearing device 2 is fitted on the support shaft 22 of the support base 16. Since the outer diameter of the support shaft 22 substantially matches the inner diameter of the hollow shaft 4, the bearing device 2 can be set vertically on the support base 16 by fitting the hollow shaft 4 to the support shaft 22. it can.

次に、止めネジ３２をゆるめた後スライダ２８を支柱２４に沿って下方にスライドせると、それに伴って予圧用コイルばね２６及び予圧付与体３０が下方に移動する。そして予圧付与体３０が軸受装置２に当接した後、更にスライダ２８を下方にスライドさせると、軸受装置２に当接している予圧付与体３０とスライダ２８との間で予圧用コイルばね２６に圧縮力が作用し、その結果、予圧用コイルばね２６が圧縮される。   Next, after the set screw 32 is loosened, when the slider 28 is slid downward along the support 24, the preload coil spring 26 and the preload imparting body 30 are moved downward accordingly. When the slider 28 is further slid downward after the preload applying body 30 contacts the bearing device 2, the preload coil spring 26 is moved between the preload applying body 30 contacting the bearing device 2 and the slider 28. As a result, the preload coil spring 26 is compressed.

この状態で止めネジ３２を締め込んでスライダ２８を固定すると、予圧用コイルばね２６に作用した圧縮力は、予圧付与体３０に伝達され、当該予圧付与体３０を下方(軸受装置２方向)に押圧する力となって働く。このとき予圧付与体３０に働いた押圧力は、当該予圧付与体３０に設けられた予圧片３０ａを介して転がり軸受１０の内輪８ａに作用すると同時に、内輪１０ａには中空軸４の押圧部４ａにより押圧力が作用する。これにより、各転がり軸受8,10に所定の予圧が付与され、その状態で内輪8a,10aを中空軸４の外周面に接着剤で固定することにより軸受装置２が製造される。   In this state, when the set screw 32 is tightened to fix the slider 28, the compressive force acting on the preload coil spring 26 is transmitted to the preload imparting body 30, and the preload imparting body 30 is moved downward (in the bearing device 2 direction). Works as a pressing force. At this time, the pressing force acting on the preload applying body 30 acts on the inner ring 8a of the rolling bearing 10 via the preloading piece 30a provided on the preload applying body 30, and at the same time, the pressing portion 4a of the hollow shaft 4 is applied to the inner ring 10a. Due to this, a pressing force acts. As a result, a predetermined preload is applied to each of the rolling bearings 8 and 10, and the bearings 2 are manufactured by fixing the inner rings 8 a and 10 a to the outer peripheral surface of the hollow shaft 4 with an adhesive.

ところで、上述したような予圧付与による製造方法によれば、当該軸受装置２の完成状態(例えば、構造上の精度や微妙な設計誤差など)に係わらず、内輪8a,10aに付与される予圧荷重は常に一定であるため、完成した軸受装置２の回転トルクにバラツキが生じる場合があった。   By the way, according to the manufacturing method by applying preload as described above, the preload applied to the inner rings 8a and 10a regardless of the completed state of the bearing device 2 (for example, structural accuracy and subtle design error). Is always constant, there may be variations in the rotational torque of the completed bearing device 2.

そこで、回転トルクのバラツキを生じること無く内輪8a,10aを中空軸４の外周面に接着剤で固定するために、例えば特許文献１に示す製造方法では、予圧付与において内輪8a,10aを中空軸４の外周面に接着剤で固定する際に、軸受装置の各転がり軸受8,10を相対回転させて回転トルクを測定し、その測定値が予め設定された回転トルク値となるように予圧荷重を調整する方法が適用されている。   Therefore, in order to fix the inner rings 8a, 10a to the outer peripheral surface of the hollow shaft 4 with an adhesive without causing variations in rotational torque, for example, in the manufacturing method shown in Patent Document 1, the inner rings 8a, 10a are attached to the hollow shaft in preloading. When fixing the outer peripheral surface of 4 with an adhesive, the rotational torque is measured by relatively rotating the rolling bearings 8 and 10 of the bearing device, and the preload is applied so that the measured value becomes a preset rotational torque value. The method of adjusting is applied.

しかしながら、特許文献１の製造方法では、例えば回転トルクの測定時における各転がり軸受8,10の回転時間や接着剤の温度設定などについて考慮されていないため、予圧付与により内輪8a,10a及び外輪8b,10bが変形してしまう場合が想定される。
各転がり軸受8,10に所定の予圧が付与する際、例えば図２(ａ)に示すように、内輪8a,10a及び外輪8b,10bには、相対的に矢印F1,F2方向の予圧荷重が作用することになる。このとき内輪8a,10a及び外輪8b,10bには、転動体8c,10cから矢印M1,M2方向の反力が作用する。 However, in the manufacturing method of Patent Document 1, for example, the rotation time of the rolling bearings 8 and 10 and the temperature setting of the adhesive at the time of measurement of the rotational torque are not taken into consideration. , 10b is assumed to be deformed.
When a predetermined preload is applied to each of the rolling bearings 8 and 10, for example, as shown in FIG. 2 (a), the inner rings 8a and 10a and the outer rings 8b and 10b are relatively preloaded in the directions of arrows F1 and F2. Will work. At this time, reaction forces in the directions of arrows M1 and M2 from the rolling elements 8c and 10c act on the inner rings 8a and 10a and the outer rings 8b and 10b.

この場合、例えば図２(ｂ)に示すように、内輪8a,10a及び外輪8b,10bは、反力が作用している箇所(反力作用部分)が矢印M1,M2方向に変形する場合が想定される。具体的に説明すると、例えば図２(ｃ)に示すように、内輪8a,10aと中空軸４との隙間Ｈ１があれば、内輪8a,10aは、その反力作用部分が隙間Ｈ１の中で内側に変形すると共に、外輪8b,10bとハウジング６との隙間Ｈ２があれば、外輪8b,10bは、その反力作用部分が隙間Ｈ２の中で外側に変形する。なお、この場合の変形量は、例えば内輪8a,10a及び外輪8b,10bの剛性や内外輪に作用する荷重などの影響もある。   In this case, for example, as shown in FIG. 2 (b), the inner rings 8a, 10a and the outer rings 8b, 10b may be deformed in the directions indicated by the arrows M1, M2 at locations where the reaction force is applied (reaction force acting portions). is assumed. More specifically, for example, as shown in FIG. 2 (c), if there is a gap H1 between the inner rings 8a, 10a and the hollow shaft 4, the inner ring 8a, 10a has a reaction force acting part in the gap H1. If the outer ring 8b, 10b has a gap H2 between the outer ring 8b, 10b and the housing 6, the reaction force acting part of the outer ring 8b, 10b is deformed to the outside in the gap H2. The amount of deformation in this case is also affected by, for example, the rigidity of the inner rings 8a and 10a and the outer rings 8b and 10b, the load acting on the inner and outer rings, and the like.

この状態で接着剤が固化すると、内輪8a,10a及び外輪8b,10bの変形状態がそのまま固定化されてしまう。従って、このような内輪8a,10a及び外輪8b,10bを有する軸受装置２をスピンドルモータやスイングアームなどに組み込んで稼働させると、中空軸４とハウジング６との相対回転中において、転動体8c,10cが変形部分(反力作用部分)を通過する度に予圧が変化することになり、これに同期して軸受装置２の剛性が変化し、その結果、トルクも変動してしまう虞がある。また、近年では高速アクセスのために高剛性が要求されていると共に、高容量化に伴ってトラック密度も小さくなっているためトルク変動を低く抑えることが要求されている。
特開２００３−１５６０５８号公報 When the adhesive is solidified in this state, the deformed state of the inner rings 8a and 10a and the outer rings 8b and 10b is fixed as it is. Therefore, when the bearing device 2 having such inner rings 8a, 10a and outer rings 8b, 10b is incorporated in a spindle motor or a swing arm and operated, the rolling elements 8c, Each time 10c passes through the deformed portion (reaction force acting portion), the preload changes, and in synchronism with this, the rigidity of the bearing device 2 changes, and as a result, the torque may also fluctuate. In recent years, high rigidity has been required for high-speed access, and the track density has been reduced with the increase in capacity, so that it is required to keep torque fluctuations low.
Japanese Patent Laid-Open No. 2003-156058

本発明は、このような問題を解決するためになされており、その目的は、予圧付与時に内外輪を変形させることの無い高剛性でトルク変動の低い安価な軸受装置及び軸受装置製造方法を提供することにある。   The present invention has been made to solve such problems, and an object of the present invention is to provide a low-cost bearing device and a bearing device manufacturing method with high rigidity and low torque fluctuation that do not deform the inner and outer rings when preload is applied. There is to do.

このような目的を達成するために、本発明は、軸とハウジングとの間に整列して介挿され、軸に対してハウジングを相対回転可能に支持する転がり軸受を有する軸受装置及び軸受製造方法であって、転がり軸受は、軸の外周面に接着剤で固定される一方の軌道輪と、ハウジングの内周面に接着剤で固定される他方の軌道輪と、両軌道輪の間に転動自在に配列した複数の転動体とを備えており、軸の外周面と一方の軌道輪との間、又は、ハウジングの内周面と他方の軌道輪との間の少なくとも一方に隙間が存在する場合において、転がり軸受に所定の予圧を付与する際に双方の軌道輪を相対的に回転して接着剤を所定の硬さに固化させる。
この発明において、接着剤が所定の硬さに固化するまで、当該接着剤を所定の温度まで加熱し、その温度に維持する。例えば、接着剤を３０℃〜６０℃の温度に維持した後、更に、７０℃〜１１０℃の温度に維持する。この場合、接着剤を３０℃〜６０℃の温度に維持している間に、転がり軸受に所定の予圧を付与しても良い。 In order to achieve such an object, the present invention provides a bearing device having a rolling bearing that is inserted in alignment between a shaft and a housing and supports the housing so as to be relatively rotatable with respect to the shaft, and a bearing manufacturing method. In this case, the rolling bearing is provided between one of the bearing rings fixed to the outer peripheral surface of the shaft with an adhesive, the other bearing ring fixed to the inner peripheral surface of the housing with an adhesive, and the two bearing rings. A plurality of rolling elements arranged in a freely movable manner, and a gap exists between at least one of the outer peripheral surface of the shaft and one of the raceways, or between the inner peripheral surface of the housing and the other raceway. In this case, when a predetermined preload is applied to the rolling bearing, both the bearing rings are relatively rotated to solidify the adhesive to a predetermined hardness.
In this invention, the adhesive is heated to a predetermined temperature and maintained at that temperature until the adhesive is solidified to a predetermined hardness. For example, after maintaining the adhesive at a temperature of 30 ° C. to 60 ° C., the adhesive is further maintained at a temperature of 70 ° C. to 110 ° C. In this case, a predetermined preload may be applied to the rolling bearing while the adhesive is maintained at a temperature of 30 ° C to 60 ° C.

本発明によれば、予圧付与時に接着剤が固化するまで内外輪を相対的に回転(揺動)させることにより、予圧付与時に内外輪を変形させることの無い高剛性でトルク変動の低い安価な軸受装置及び軸受装置製造方法を実現することができる。   According to the present invention, by relatively rotating (swinging) the inner and outer rings until the adhesive is solidified when preload is applied, the inner ring and the outer ring are not deformed when preload is applied. A bearing device and a bearing device manufacturing method can be realized.

以下、本発明の一実施の形態に係る軸受装置について図１を参照して説明する。
なお、本実施の形態の説明では、図３(ａ)と同一構成の軸受装置２を想定すると共に、この軸受装置２を製造する製造装置は、図３(ｂ)と同一のものを利用しているため、以下の説明では、相違する構成についての説明に止める。 Hereinafter, a bearing device according to an embodiment of the present invention will be described with reference to FIG.
In the description of the present embodiment, the bearing device 2 having the same configuration as that in FIG. 3A is assumed, and the manufacturing apparatus for manufacturing the bearing device 2 uses the same device as that in FIG. Therefore, in the following description, only a description of a different configuration will be given.

図１(ａ)に示すように、本実施の形態の軸受装置製造方法に適用する製造装置には、製造装置(図３(ｂ))により予圧荷重が付与された状態の軸受装置２を所定方向に回転させる回転装置３４が増設されている。
回転装置３４は、軸受装置２のハウジング６に接触しているローラ３６と、ローラ３６を所定方向に回転させるモータ３８と、モータ３８の負荷トルクを検出するトルクセンサ４０とを備えており、トルクセンサ４０で検出されたモータ３８の負荷トルクは、図示しない表示器に表示されるようになっている。 As shown in FIG. 1 (a), a bearing device 2 in a state in which a preload is applied by a manufacturing device (FIG. 3 (b)) is used as a manufacturing device applied to the bearing device manufacturing method of the present embodiment. A rotating device 34 that rotates in the direction is added.
The rotating device 34 includes a roller 36 that is in contact with the housing 6 of the bearing device 2, a motor 38 that rotates the roller 36 in a predetermined direction, and a torque sensor 40 that detects a load torque of the motor 38. The load torque of the motor 38 detected by the sensor 40 is displayed on a display (not shown).

本実施の形態の軸受装置製造方法では、例えば、中空軸４の外周面と一方の軌道輪(内輪8a,10a)との間、又はハウジング６の内周面と他方の軌道輪(外輪8b,10b)との間の少なくとも一方に隙間が存在する場合を想定しており、各転がり軸受8,10に所定の予圧を付与する際に、回転装置３４(ローラ３６)でハウジング６を所定方向に回転させることにより、双方の軌道輪(内外輪)を相対的に回転させて接着剤を所定の硬さに固化させる。即ち、接着剤が所定の硬さに固化するまで内外輪を相対的に回転させる。   In the bearing device manufacturing method of the present embodiment, for example, between the outer peripheral surface of the hollow shaft 4 and one of the race rings (inner rings 8a, 10a), or the inner peripheral surface of the housing 6 and the other race ring (the outer rings 8b, 10b) is assumed that there is a gap in at least one of them, and when a predetermined preload is applied to each of the rolling bearings 8, 10, the housing 6 is moved in a predetermined direction by the rotating device 34 (roller 36). By rotating, both the bearing rings (inner and outer rings) are relatively rotated to solidify the adhesive to a predetermined hardness. That is, the inner and outer rings are relatively rotated until the adhesive is solidified to a predetermined hardness.

このような製造方法によれば、軸受装置２に予圧荷重を付与した状態で接着剤が固化するまで内外輪を回転させているため、内輪8a,10a及び外輪8b,10bを変形させる力が一部に集中すること無く回転方向に等間隔に分散させることができる。この場合、接着剤が固化した状態において従来予想されたような部分的な変形は生じない。更に、接着剤が完全に固化して軸受装置２が完成した状態で、当該軸受装置２を回転装置３４で回転させてもトルクが変動することは無い。この結果、高剛性の軸受装置２を実現することができる。なお、トルクの変動状態はトルクセンサ４０で検出することが可能であり、その検出結果は図示しない表示器に表示させて確認することが可能である。   According to such a manufacturing method, since the inner and outer rings are rotated until the adhesive is solidified with the preload applied to the bearing device 2, the force that deforms the inner rings 8a and 10a and the outer rings 8b and 10b is one. It is possible to disperse at equal intervals in the rotation direction without concentrating on the part. In this case, there is no partial deformation as expected in the past when the adhesive is solidified. Further, the torque does not fluctuate even if the bearing device 2 is rotated by the rotating device 34 in a state where the adhesive is completely solidified and the bearing device 2 is completed. As a result, a highly rigid bearing device 2 can be realized. The torque fluctuation state can be detected by the torque sensor 40, and the detection result can be confirmed by displaying it on a display (not shown).

また、本実施の形態の製造方法では、現状の軸受装置２に回転装置３４を増設するだけで実現することができるため、装置の製造コストを大幅に抑えることができる。なお、回転装置３４で内外輪を回転させる時間や回転速度などは、接着剤の種類や性質に応じて任意に設定されるため、ここでは特に限定しない。   Moreover, in the manufacturing method of this Embodiment, since it can implement | achieve only by adding the rotation apparatus 34 to the present bearing apparatus 2, the manufacturing cost of an apparatus can be suppressed significantly. It should be noted that the time and rotational speed for rotating the inner and outer rings by the rotating device 34 are arbitrarily set according to the type and nature of the adhesive, and are not particularly limited here.

また、本実施の形態の製造方法において、接着剤が所定の硬さに固化するまで、当該接着剤を所定の温度まで加熱し、その温度に維持(放置：キュアリング)するようにしても良い。このような製造方法によれば、接着剤の固化を促進させることができるため、軸受装置２の製造効率を向上させることができる。
具体的な温度設定としては、接着剤の種類や製造装置の使用環境により任意に設定することができるため、特に限定はしないが、例えば、接着剤を３０℃〜６０℃の温度に維持(初期キュアリング)した後、更に７０℃〜１１０℃の温度に維持(キュアリング)するように設定しても良い。 Further, in the manufacturing method of the present embodiment, the adhesive may be heated to a predetermined temperature and maintained at that temperature (standby: curing) until the adhesive is solidified to a predetermined hardness. . According to such a manufacturing method, since the solidification of the adhesive can be promoted, the manufacturing efficiency of the bearing device 2 can be improved.
Specific temperature setting can be arbitrarily set depending on the type of adhesive and the usage environment of the manufacturing apparatus, and is not particularly limited. For example, the adhesive is maintained at a temperature of 30 ° C. to 60 ° C. (initial After curing, the temperature may be further maintained (cured) at a temperature of 70 ° C. to 110 ° C.

この場合、接着剤を３０℃〜６０℃の温度に維持している間だけ、軸受装置２を回転しながら同時に所定の予圧を付与しても良いし、或いは、７０℃〜１１０℃の温度に維持している間は、軸受装置２の回転を停止させると共に予圧も与えないようにしても良い。いずれの場合も上記同様の効果を実現することができる。   In this case, only while the adhesive is maintained at a temperature of 30 ° C. to 60 ° C., a predetermined preload may be simultaneously applied while rotating the bearing device 2, or the temperature may be set at 70 ° C. to 110 ° C. During the maintenance, the rotation of the bearing device 2 may be stopped and no preload may be applied. In either case, the same effect as described above can be realized.

なお、本実施の形態の製造方法を実現するための装置としては、例えば図１(ｂ)に示すように、予圧付与ユニット２０の代わりに予圧用錘４２、回転装置３４の代わりにベルト４４を用いても良い。この場合、予圧用錘４２の自重により予圧付与体３０(予圧片３０ａ)を軸受装置２に押圧させて所定の予圧を付与した状態で、ベルト４４を走行させ、その走行力により軸受装置２を回転させる。このとき、ベルト４４を揺動させても良い。なお、ベルト４４の揺動運動は、転動体8c,10cの公転が隣り合う転動体8c,10cの位置以上の揺動回転となれば良い。   As a device for realizing the manufacturing method of the present embodiment, for example, as shown in FIG. 1B, a preload weight 42 is used instead of the preload applying unit 20, and a belt 44 is used instead of the rotating device 34. It may be used. In this case, the belt 44 is caused to travel in a state in which the preloading body 30 (preloading piece 30a) is pressed against the bearing device 2 by the own weight of the preloading weight 42 and a predetermined preload is applied, and the bearing device 2 is moved by the traveling force. Rotate. At this time, the belt 44 may be swung. The swinging motion of the belt 44 is not limited as long as the rolling motion of the rolling elements 8c and 10c is a swinging rotation over the position of the adjacent rolling elements 8c and 10c.

(ａ)は、本発明の一実施の形態に係る軸受装置を製造するための構成例を示す部分断面図、(ｂ)は、本発明の変形例に係る軸受装置を製造するための構成例を示す部分断面図。(a) is a fragmentary sectional view which shows the structural example for manufacturing the bearing apparatus which concerns on one embodiment of this invention, (b) is the structural example for manufacturing the bearing apparatus which concerns on the modification of this invention. FIG. (ａ)は、転がり軸受に予圧荷重が作用した状態を示す断面図、(ｂ)は、予圧荷重により内輪及び外輪が変形した転がり軸受の断面図、(ｃ)は、予圧荷重により内輪及び外輪が変形した軸受装置の断面図。(a) is a sectional view showing a state in which a preload is applied to the rolling bearing, (b) is a sectional view of the rolling bearing in which the inner ring and the outer ring are deformed by the preload, and (c) is an inner ring and an outer ring by the preload. Sectional drawing of the bearing apparatus which deform | transformed. (ａ)は、軸受装置の構成例を示す部分断面図、(ｂ)は、従来の軸受装置を製造するための構成例を示す部分断面。(a) is a fragmentary sectional view which shows the structural example of a bearing apparatus, (b) is a partial cross section which shows the structural example for manufacturing the conventional bearing apparatus.

符号の説明Explanation of symbols

２ 軸受装置
４ 中空軸
６ ハウジング
8,10 転がり軸受
8a,10a 内輪
8b,10b 外輪
8c,10c 転動体
３４ 回転装置
４２ 予圧用錘
４４ ベルト
2 Bearing device 4 Hollow shaft 6 Housing
8,10 Rolling bearing
8a, 10a Inner ring
8b, 10b Outer ring
8c, 10c Rolling element 34 Rotating device 42 Preloading weight 44 Belt

Claims (8)

軸とハウジングとの間に整列して介挿され、軸に対してハウジングを相対回転可能に支持する転がり軸受を有する軸受装置であって、
転がり軸受は、軸の外周面に接着剤で固定される一方の軌道輪と、ハウジングの内周面に接着剤で固定される他方の軌道輪と、両軌道輪の間に転動自在に配列した複数の転動体とを備えており、軸の外周面と一方の軌道輪との間、又は、ハウジングの内周面と他方の軌道輪との間の少なくとも一方に隙間が存在する場合において、
転がり軸受に所定の予圧を付与する際に双方の軌道輪を相対的に回転して接着剤を所定の硬さに固化させることを特徴とする軸受装置。 A bearing device having a rolling bearing that is inserted in alignment between a shaft and a housing and supports the housing so as to be relatively rotatable with respect to the shaft,
The rolling bearing is arranged between one of the race rings and one of the race rings fixed to the outer peripheral surface of the shaft with an adhesive, the other race ring fixed to the inner peripheral surface of the housing with an adhesive, and the two race rings. In the case where there is a gap between at least one of the outer peripheral surface of the shaft and one of the race rings, or between the inner peripheral surface of the housing and the other race ring,
A bearing device characterized in that when a predetermined preload is applied to a rolling bearing, both bearing rings are relatively rotated to solidify the adhesive to a predetermined hardness. 接着剤が所定の硬さに固化するまで、当該接着剤を所定の温度まで加熱し、その温度に維持することを特徴とする請求項１に記載の軸受装置。   The bearing device according to claim 1, wherein the adhesive is heated to a predetermined temperature and maintained at that temperature until the adhesive is solidified to a predetermined hardness. 接着剤を３０℃〜６０℃の温度に維持した後、更に、７０℃〜１１０℃の温度に維持することを特徴とする請求項２に記載の軸受装置。   The bearing device according to claim 2, wherein the adhesive is further maintained at a temperature of 70 ° C to 110 ° C after being maintained at a temperature of 30 ° C to 60 ° C. 接着剤を３０℃〜６０℃の温度に維持している間に、転がり軸受に所定の予圧を付与することを特徴とする請求項１〜３のいずれかに記載の軸受装置。   The bearing device according to any one of claims 1 to 3, wherein a predetermined preload is applied to the rolling bearing while the adhesive is maintained at a temperature of 30C to 60C. 軸とハウジングとの間に整列して介挿され、軸に対してハウジングを相対回転可能に支持する転がり軸受を有する軸受装置の製造方法であって、
転がり軸受は、軸の外周面に接着剤で固定される一方の軌道輪と、ハウジングの内周面に接着剤で固定される他方の軌道輪と、両軌道輪の間に転動自在に配列した複数の転動体とを備えており、軸の外周面と一方の軌道輪との間、又は、ハウジングの内周面と他方の軌道輪との間の少なくとも一方に隙間が存在する場合において、
転がり軸受に所定の予圧を付与する際に双方の軌道輪を相対的に回転して接着剤を所定の硬さに固化させることを特徴とする軸受装置製造方法。 A manufacturing method of a bearing device having a rolling bearing that is inserted in alignment between a shaft and a housing and supports the housing so as to be relatively rotatable with respect to the shaft,
The rolling bearing is arranged between one of the race rings and one of the race rings fixed to the outer peripheral surface of the shaft with an adhesive, the other race ring fixed to the inner peripheral surface of the housing with an adhesive, and the two race rings. In the case where there is a gap between at least one of the outer peripheral surface of the shaft and one of the race rings, or between the inner peripheral surface of the housing and the other race ring,
A bearing device manufacturing method characterized in that when a predetermined preload is applied to a rolling bearing, both bearing rings are relatively rotated to solidify the adhesive to a predetermined hardness. 接着剤が所定の硬さに固化するまで、当該接着剤を所定の温度まで加熱し、その温度に維持することを特徴とする請求項５に記載の軸受装置製造方法。   The bearing device manufacturing method according to claim 5, wherein the adhesive is heated to a predetermined temperature and maintained at that temperature until the adhesive is solidified to a predetermined hardness. 接着剤を３０℃〜６０℃の温度に維持した後、更に、７０℃〜１１０℃の温度に維持することを特徴とする請求項５に記載の軸受装置製造方法。   The bearing device manufacturing method according to claim 5, wherein the adhesive is maintained at a temperature of 30 ° C. to 60 ° C., and further maintained at a temperature of 70 ° C. to 110 ° C. 6. 接着剤を３０℃〜６０℃の温度に維持している間に、転がり軸受に所定の予圧を付与することを特徴とする請求項５〜７のいずれかに記載の軸受装置製造方法。
A bearing device manufacturing method according to any one of claims 5 to 7, wherein a predetermined preload is applied to the rolling bearing while the adhesive is maintained at a temperature of 30C to 60C.
JP2004251451A 2004-08-31 2004-08-31 Bearing device manufacturing method Expired - Fee Related JP4389729B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009002504A (en) * 2007-05-21 2009-01-08 Nsk Ltd Bearing device and its assembling method
JP2010106867A (en) * 2008-10-28 2010-05-13 Nsk Ltd Bearing device and method for assembling the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009002504A (en) * 2007-05-21 2009-01-08 Nsk Ltd Bearing device and its assembling method
JP2010106867A (en) * 2008-10-28 2010-05-13 Nsk Ltd Bearing device and method for assembling the same

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