JP2507179Y2 - Preloading structure of rolling bearing device - Google Patents
Preloading structure of rolling bearing deviceInfo
- Publication number
- JP2507179Y2 JP2507179Y2 JP1990091763U JP9176390U JP2507179Y2 JP 2507179 Y2 JP2507179 Y2 JP 2507179Y2 JP 1990091763 U JP1990091763 U JP 1990091763U JP 9176390 U JP9176390 U JP 9176390U JP 2507179 Y2 JP2507179 Y2 JP 2507179Y2
- Authority
- JP
- Japan
- Prior art keywords
- preload
- spacer
- preload spacer
- bearing device
- notch
- 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 - Fee Related
Links
Classifications
-
- 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
- F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
- F16C25/06—Ball or roller bearings
- F16C25/08—Ball or roller bearings self-adjusting
- F16C25/083—Ball or roller bearings self-adjusting with resilient means acting axially on a race ring to preload the bearing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は転がり軸受装置の予圧構造に関し、特に、ハ
ードディスク装置、VTR等に用いられる精密シャフトユ
ニットに適したものに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a preload structure for a rolling bearing device, and more particularly to a structure suitable for a precision shaft unit used in a hard disk drive, a VTR or the like.
従来の精密シャフトユニットは、第７図に示す様に、
軸（１）の外周面に離隔形成された２列の軌道溝（1a）
に転動体（３）を介して外輪（５）を装着し、外輪
（５）（５）間にバネ座（15）を介して装着したコイル
バネ（16）によって軸受部に予圧が負荷されるようにし
ていた。The conventional precision shaft unit, as shown in FIG.
Two rows of raceway grooves (1a) formed separately on the outer peripheral surface of the shaft (1)
The outer ring (5) is mounted on the outer ring (3) via the rolling element (3), and the bearing part is preloaded by the coil spring (16) mounted via the spring seat (15) between the outer rings (5) and (5). I was doing.
精密シャフトユニットは、外輪と軌道溝間への転動体
の組込み、外輪間へのコイルバネの装着など、自動化が
困難な組立て工程を多く必要とし、製品コストにしめる
組立てコストの比重が大きい。しかも、精密シャフトユ
ニットは、情報機器用スピンドル等への用途が中心であ
ることから、その部品寸法が小さく組立作業も困難であ
る。The precision shaft unit requires many assembling steps that are difficult to automate, such as assembling rolling elements between the outer ring and the raceway groove, and mounting coil springs between the outer rings, and the assembly cost has a large weight in the product cost. Moreover, since the precision shaft unit is mainly used for spindles for information equipment and the like, its component size is small and the assembling work is difficult.
前述したように、従来の精密シャフトユニットは、外
輪間に介在するコイルバネによって軸受部に予圧を負荷
するようにしているが、このコイルバネの装着は、以下
に示す手順でおこなわれる。（第８図参照）。As described above, in the conventional precision shaft unit, the preload is applied to the bearing portion by the coil spring interposed between the outer rings, but the mounting of this coil spring is performed in the following procedure. (See FIG. 8).
片側の軸受部を組立てた後、軸（１）を治具（20）
に挿入して固定する（同図ａ）。After assembling the bearing part on one side, attach the shaft (1) to the jig (20).
And fix it (a in the figure).
バネ座（15）、コイルバネ（16）、バネ座（15）の
順で軸（１）に挿入する（同図ｃ）。The spring seat (15), the coil spring (16), and the spring seat (15) are inserted into the shaft (1) in this order (FIG. 7C).
治具（20）の上面に基台（21）を置き、押え板（2
2）を用いてコイルバネ（16）を圧縮しながらもう一方
の軸受部を組立てる（同図ｂ）。Place the base (21) on the upper surface of the jig (20) and press the holding plate (2
Assemble the other bearing while compressing the coil spring (16) using (2) (b in the figure).
このように、コイルバネの装着は、コイルバネを圧縮
しながらもう一方の軸受部を組み立てるという困難な作
業を必要としていた。As described above, the mounting of the coil spring requires the difficult work of assembling the other bearing portion while compressing the coil spring.
一方、コイルバネの装着作業を簡略化したものとし
て、バネ座を馬蹄形状とし、両外輪の装着後にバネ座の
切欠き部およびコイルバネの内径を弾性的に拡径せしめ
て、両外輪間に介装したものが実開昭57-150619号公報
に記載されている。しかし、この予圧構造では、コイル
バネを圧縮しながらバネ座を装着する作業が必要であ
り、作業性は依然として悪く、自動化も困難である。On the other hand, as a simplification of the coil spring mounting work, the spring seat is made into a horseshoe shape, and after mounting both outer rings, the notch part of the spring seat and the inner diameter of the coil spring are elastically expanded, and the coil spring is interposed between both outer rings. This is described in Japanese Utility Model Publication No. 57-150619. However, in this preload structure, it is necessary to mount the spring seat while compressing the coil spring, workability is still poor, and automation is also difficult.
そこで本考案の目的は、組立作業を効率化することが
できる予圧構造を提供することにある。Therefore, an object of the present invention is to provide a preload structure that can improve the efficiency of assembly work.
本考案は、予圧ばねやばね座を用いることなく、間座
を弾性材料で成形し、間座の材料的特性に基づき予圧を
付与することによって上記課題を解決したものである。
すなわち、本考案の転がり軸受装置の予圧構造は、軸方
向に離隔した位置に外方軌道を有する軸体と、外方軌道
と対向する内方軌道を有する一対の外輪と、内方軌道と
外方軌道との間に配列された転動体と、前記外輪間に介
装せしめた予圧間座とからなり、前記予圧間座が弾性材
料で成形され、かつ、軸方向の切欠き部を有する横断面
馬蹄形であることを特徴としている。The present invention solves the above problem by forming a spacer with an elastic material and applying a preload based on the material characteristics of the spacer without using a preload spring or a spring seat.
That is, the preload structure of the rolling bearing device according to the present invention comprises a shaft body having an outer raceway at positions axially separated from each other, a pair of outer rings having an inner raceway facing the outer raceway, an inner raceway and an outer raceway. A rolling element arranged between the outer race and a preload spacer interposed between the outer races, the preload spacer being formed of an elastic material and having a notch in the axial direction. It is characterized by a horseshoe shape.
予圧間座をジャバラ状にすることにより、予圧間座の
材料的特性のみならず形状的特性によっても弾性が得ら
れる。By making the preload spacer into a bellows shape, elasticity can be obtained not only by the material property of the preload spacer but also by the shape property.
予圧間座の前記切欠き部と対向する位置に開口部を設
けることにより、弾性変形を生ずる部分が対称となるた
め外輪に加わる力が均等となる。By providing the opening at a position facing the cutout portion of the preload spacer, the portion that undergoes elastic deformation becomes symmetrical, so that the force applied to the outer ring becomes uniform.
予圧間座は、弾性材料で形成されしかも軸方向の切欠
き部を有するから、切欠き部を弾性的に押し広げること
によって、軸の側面から装着することが可能になる。し
たがって、軸受部の組立て作業がすべて完了した後に予
圧間座を装着することができる。Since the preload spacer is made of an elastic material and has a notch in the axial direction, the preload spacer can be mounted from the side surface of the shaft by elastically expanding the notch. Therefore, the preload spacer can be mounted after all the assembling work of the bearing portion is completed.
以下、本考案の実施例を図面に基づいて説明する。第
１図は、本考案に係る予圧構造を具えた精密シャフトユ
ニットを示す。この精密シャフトユニットは、一対の軌
道溝（1a）を軸方向に離隔形成した軸（１）、軌道溝
（1a）に配された複数のボール（３）、ボール（３）を
円周等間隔に保持する保持器（４）、ボール（３）を介
して軌道溝（1a）に装着された外輪（５）、外輪（５）
の非対向側端部に装着されたシール（６）、および外輪
（５）（５）間に介在する予圧間座（７）で構成され
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a precision shaft unit having a preload structure according to the present invention. This precision shaft unit includes a shaft (1) formed by axially separating a pair of raceway grooves (1a), a plurality of balls (3) arranged in the raceway groove (1a), and balls (3) equidistantly spaced around the circumference. A retainer (4) held on the outer ring (5) mounted on the raceway groove (1a) via balls (3), an outer ring (5)
A seal (6) attached to the non-opposing side end of the and a preload spacer (7) interposed between the outer rings (5) and (5).
予圧間座（７）は、第２図に示すように、弾性材料例
えば樹脂材料（高分子エラストマ）で形成された筒体の
一部に軸方向の切欠き部（7a）を設けたもので、馬蹄形
断面を有する。また、予圧間座（７）の両端面にはイン
ロー部（7b）が形成されており、予圧間座（７）はイン
ロー部（7b）を外輪（５）のシール溝あるいは内径面に
嵌着される。さらに、切欠き部（7a）の周方向幅寸法
は、嵌着時に、インロー部（7b）の外周寸法が外輪
（５）の内径寸法に近づくように可能な限り小さくさて
いる。このため、予圧間座（７）はシール機能をも兼ね
具える。予圧間座（７）の装着は、外輪（５）（５）の
装着が完了した後に、切欠き部（7a）を弾性的に押し広
げて軸（１）に側面から装着する。The preload spacer (7) is, as shown in FIG. 2, provided with an axial notch (7a) in a part of a cylindrical body made of an elastic material such as a resin material (polymer elastomer). , Having a horseshoe-shaped cross section. In addition, a spigot portion (7b) is formed on both end surfaces of the preload spacer (7), and the preload spacer (7) fits the spigot portion (7b) into the seal groove or the inner diameter surface of the outer ring (5). To be done. Further, the circumferential width dimension of the cutout portion (7a) is made as small as possible so that the outer peripheral dimension of the spigot portion (7b) approaches the inner diameter dimension of the outer ring (5) at the time of fitting. Therefore, the preload spacer (7) also has a sealing function. For mounting the preload spacer (7), after the outer rings (5) and (5) are completely mounted, the notch (7a) is elastically expanded and mounted on the shaft (1) from the side.
第３図は、予圧間座（７）をジャバラ状にした実施例
を示す。同図（ａ）は外周部の肉抜きをおこなってジャ
バラ状にしたもの、同図（ｂ）は側面自体を湾曲させて
ジャバラ状にしたものを夫々示す。この予圧間座（７）
は、樹脂材料自体の材質的弾性とジャバラ状の形状的弾
性とが相まって、第６図に示すように、良好な（軸方向
変形量）−（発生荷重）特性を示す（線図ａ）。第２図
に示す予圧間座（７）の場合、形成材料によっては、一
定の軸方向変形量を超えると塑性変形をおこし、所定の
予圧量が得られない場合がある。（線図ｂ）。しかし、
この予圧間座（７）は、形状的弾性をも兼ね具えている
ため、比較的広い範囲にわたってリニアーな特性を示
す。したがって、予圧間座（７）の軸方向変形量を調整
することによって、所定の予圧量を容易にしかも確実に
得ることができる。FIG. 3 shows an embodiment in which the preload spacer (7) has a bellows shape. The figure (a) shows the bellows shape by thinning the outer peripheral portion, and the figure (b) shows the bellows shape by curving the side surface itself. This preload spacer (7)
Shows a good (axial deformation amount)-(generated load) characteristic as shown in FIG. 6 due to the combination of the material elasticity of the resin material itself and the bellows shape elasticity (line a). In the case of the preload spacer (7) shown in FIG. 2, depending on the forming material, plastic deformation may occur when a predetermined axial deformation amount is exceeded, and a predetermined preload amount may not be obtained. (Diagram b). But,
Since the preload spacer (7) also has a shape elasticity, it exhibits a linear characteristic over a relatively wide range. Therefore, by adjusting the axial deformation amount of the preload spacer (7), the predetermined preload amount can be easily and surely obtained.
第４図は、第３図に示すジャバラ状の予圧間座（７）
に、切欠き部（7a）と対向する開口部（7c）を設けた実
施例を示す。この予圧間座（７）は、第３図に示すもの
に比べてさらに剛性が低下し、形状的弾性が大きくなる
（第６図線図ｃ参照）。また、第２図および第３図に示
すものでは、軸方向の荷重を受けた場合に切欠き部（7
a）側が軸方向に大きく変形し、外輪（５）が傾いた状
態になる危険性がある。しかし、この予圧間座（７）
は、切欠き部（7a）と対向させて開口部（7c）を設けて
あるため、双方の側の剛性が同程度になって、同程度の
変形をする。したがって、変形量の差によって、外輪
（５）が傾いた状態になる危険性がない。FIG. 4 is a bellows type preload spacer (7) shown in FIG.
An example in which an opening (7c) facing the notch (7a) is provided is shown in FIG. The preload spacer (7) has lower rigidity and greater shape elasticity than that shown in FIG. 3 (see FIG. 6, diagram c). In addition, in the one shown in FIGS. 2 and 3, the cutout portion (7
There is a risk that the a) side will be greatly deformed in the axial direction and the outer ring (5) will be tilted. However, this preload spacer (7)
Since the opening (7c) is provided so as to face the notch (7a), both sides have the same rigidity and are deformed to the same degree. Therefore, there is no risk that the outer ring (5) will be inclined due to the difference in the amount of deformation.
第５図は、切欠き部（7a）の両側に案内部（7d）を形
成した実施例を示す。案内部（7d）は、軸（１）の外周
面と同程度の曲率をもつ。このため、切欠き部（7a）を
軸（１）の側面にあてがって、予圧間座（７）を軸
（１）側に向けて押圧すると、案内部（7d）が軸（１）
の外周面を滑って、切欠き部（7a）が拡大され、予圧間
座（７）が軸（１）に装着される。したがって、この予
圧間座（７）は、装着の際に、切欠き部（7a）を押し広
げる手間がかからず、軸（１）側に押圧するだけで容易
に装着することができる。また、この予圧間座（７）
は、切欠き部（7a）の周方向幅寸法を極めて小さく（閉
じた状態でも可）した場合でも軸（１）への装着が可能
であり、装着後のシール機能が一層向上する。FIG. 5 shows an embodiment in which guide portions (7d) are formed on both sides of the cutout portion (7a). The guide portion (7d) has a curvature similar to that of the outer peripheral surface of the shaft (1). Therefore, when the notch (7a) is applied to the side surface of the shaft (1) and the preload spacer (7) is pressed toward the shaft (1) side, the guide portion (7d) is moved to the shaft (1).
The notch (7a) is enlarged by sliding on the outer peripheral surface of the shaft, and the preload spacer (7) is mounted on the shaft (1). Therefore, the preload spacer (7) can be easily mounted by simply pressing it toward the shaft (1) without the need for expanding the notch (7a) at the time of mounting. Also, this preload spacer (7)
Can be mounted on the shaft (1) even when the circumferential width of the notch (7a) is extremely small (may be closed), and the sealing function after mounting is further improved.
尚、以上説明した予圧間座（７）をゴム材料で形成す
るようにしてもよい。The preload spacer (7) described above may be made of a rubber material.
本考案によれば、軸受部の組立作業が完了した後に予
圧間座を装着することができるようになり、軸受け装置
の組立作業が著しく効率化される。According to the present invention, the preload spacer can be mounted after the assembly work of the bearing portion is completed, and the assembly work of the bearing device is remarkably streamlined.
また、予圧間座をジャバラ状にすることによって、所
定の予圧量を容易にしかも確実に負荷することができ
る。Further, by making the preload spacer into a bellows shape, it is possible to easily and reliably apply a predetermined amount of preload.
さらに、実施例に示すように、予圧間座の両端面にイ
ンロー部を形成することによって、予圧間座にシール機
能をも兼ね具えさせることができる。これにより、従来
のバネ座が不要となり、部品点数の削減さらには組立作
業の一層の効率化が図られ、コスト上有利になる。Further, as shown in the embodiment, by forming the spigot portions on both end faces of the preloading spacer, the preloading spacer can also have a sealing function. This eliminates the need for a conventional spring seat, reduces the number of parts, and further improves the efficiency of assembly work, which is advantageous in terms of cost.
第１図は本考案に係る予圧構造を具えた精密シャフトユ
ニットの断面図、 第２図は予圧間座の正面図およびII-II断面図、 第３図は他の実施例に係る予圧間座の正面図および一部
断面図、 第４図は他の実施例に係る予圧間座の正面図および側面
図、 第５図は他の実施例に係る予圧間座の正面図、 第６図は予圧間座の軸方向変形量と発生荷重（予圧量）
との関係を示すグラフ、 第７図は従来の精密シャフトユニットの断面図、 第８図は従来の精密シャフトユニットの組立手順を示す
略図である。 １……軸、５……外輪 ７……予圧間座 7a:切欠き部FIG. 1 is a sectional view of a precision shaft unit equipped with a preloading structure according to the present invention, FIG. 2 is a front view and a II-II sectional view of a preloading spacer, and FIG. 3 is a preloading spacer according to another embodiment. 4 is a front view and a side view of a preload spacer according to another embodiment, FIG. 5 is a front view of a preload spacer according to another embodiment, and FIG. Axial deformation amount of preload spacer and generated load (preload amount)
FIG. 7 is a cross-sectional view of a conventional precision shaft unit, and FIG. 8 is a schematic diagram showing the assembling procedure of the conventional precision shaft unit. 1 ... Shaft, 5 ... Outer ring 7 ... Preload spacer 7a: Notch
Claims (3)
軸体と、外方軌道と対向する内方軌道を有する一対の外
輪と、内方軌道と外方軌道との間に配列された転動体
と、前記外輪間に介装せしめた予圧間座とからなり、前
記予圧間座が弾性を有する高分子エラストマまたはゴム
で形成され、かつ、軸方向の切欠き部を有する横断面馬
蹄形であることを特徴とする転がり軸受装置の予圧構
造。1. A shaft body having an outer raceway at axially separated positions, a pair of outer rings having an inner raceway facing the outer raceway, and a shaft body arranged between the inner raceway and the outer raceway. A rolling element and a preload spacer interposed between the outer races, the preload spacer being formed of elastic polymer elastomer or rubber and having a notch in the axial direction and having a horseshoe-shaped cross section. A preload structure for a rolling bearing device, characterized in that
の転がり軸受装置の予圧構造。2. The bellows-shaped preload spacer.
Preloading structure of rolling bearing device.
置に開口部を設けた請求項２の転がり軸受装置の予圧構
造。3. The preload structure for a rolling bearing device according to claim 2, wherein an opening is provided at a position facing the notch of the preload spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990091763U JP2507179Y2 (en) | 1990-08-31 | 1990-08-31 | Preloading structure of rolling bearing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990091763U JP2507179Y2 (en) | 1990-08-31 | 1990-08-31 | Preloading structure of rolling bearing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0449225U JPH0449225U (en) | 1992-04-27 |
| JP2507179Y2 true JP2507179Y2 (en) | 1996-08-14 |
Family
ID=31827678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990091763U Expired - Fee Related JP2507179Y2 (en) | 1990-08-31 | 1990-08-31 | Preloading structure of rolling bearing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2507179Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110513391B (en) * | 2019-08-29 | 2024-07-23 | 宁波银球科技股份有限公司 | Double-face sealing double-outer-ring long-shaft double-row ball bearing with O-shaped ring pretension |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48101038U (en) * | 1972-03-01 | 1973-11-28 | ||
| JPS5819121U (en) * | 1981-07-30 | 1983-02-05 | 日本精工株式会社 | spindle device |
| JPS59105619U (en) * | 1982-12-29 | 1984-07-16 | 株式会社不二越 | Preload spacer |
-
1990
- 1990-08-31 JP JP1990091763U patent/JP2507179Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0449225U (en) | 1992-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH05340460A (en) | Ball screw | |
| JP2006528326A (en) | Bearing race and wheel bearing device | |
| JPS6098216A (en) | Revolution supporter with bearing having angle of contact | |
| JPH0540328Y2 (en) | ||
| JP2507179Y2 (en) | Preloading structure of rolling bearing device | |
| JP7455540B2 (en) | rolling bearing | |
| JPH0429130Y2 (en) | ||
| JPS60252837A (en) | Bearing device for flywheel | |
| JPH09196066A (en) | Slinger for rolling bearing | |
| JPH07167151A (en) | Double row rolling bearing device with preload | |
| JP2503186Y2 (en) | Rolling bearing device | |
| CN109661523B (en) | Axle bearing device | |
| JPH06235417A (en) | Spherical sliding bush | |
| JP3159582B2 (en) | Double row ball bearing | |
| JPH0138333Y2 (en) | ||
| JPH04113022A (en) | Structure for pressurizing ball bearing apparatus | |
| JP3507558B2 (en) | Rotary axis vibration control device and rotary axis | |
| JPH0640979Y2 (en) | Thrust bearing | |
| JPH08170635A (en) | Preload device for single row rolling bearing | |
| JPH034831Y2 (en) | ||
| JPS5819121U (en) | spindle device | |
| JP4439835B2 (en) | Bearing cage | |
| JPH0648179Y2 (en) | spindle | |
| JPH0653820U (en) | Center bearing support | |
| JP4277528B2 (en) | Handle column bearing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |