JP2632445B2 - Hollow way for linear motion bearing - Google Patents
Hollow way for linear motion bearingInfo
- Publication number
- JP2632445B2 JP2632445B2 JP7558691A JP7558691A JP2632445B2 JP 2632445 B2 JP2632445 B2 JP 2632445B2 JP 7558691 A JP7558691 A JP 7558691A JP 7558691 A JP7558691 A JP 7558691A JP 2632445 B2 JP2632445 B2 JP 2632445B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- linear motion
- hollow
- linear
- motion bearing
- 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 - Lifetime
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
- F16C29/00—Bearings for parts moving only linearly
- F16C29/004—Fixing of a carriage or rail, e.g. rigid mounting to a support structure or a movable part
-
- 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
- F16C29/00—Bearings for parts moving only linearly
- F16C29/005—Guide rails or tracks for a linear bearing, i.e. adapted for movement of a carriage or bearing body there along
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、直動軸受用中空軌道台
に関し、特に、取付面に２本平行に設置して使用するの
に適した直動軸受用中空軌道台に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow raceway for a linear motion bearing, and more particularly, to a hollow raceway for a linear motion bearing which is suitable for being installed in two parallel on a mounting surface.
【０００２】[0002]
【従来の技術】直動軸受は、ころがり案内を利用したも
のであるので、従来のすべり案内を利用した摺動案内装
置に比べて摩擦抵抗を大幅に減少させることができる。
また、プリロードをかけることにより、高精度に且つ高
剛性でも使用することができる。これらの理由により、
直動軸受は、近年種々の用途に使用されてきている。2. Description of the Related Art Since a linear motion bearing uses a rolling guide, the frictional resistance can be greatly reduced as compared with a conventional sliding guide device using a sliding guide.
In addition, by applying a preload, it can be used with high accuracy and high rigidity. For these reasons,
Linear motion bearings have been used in various applications in recent years.
【０００３】かかる直動軸受の典型的な使用方法は、以
下のようである。まず、一対の直動軸受用軌道台を取付
面にほぼ平行に設置する。それぞれの軌道台に、多数の
ボールを介して１又は複数の鞍状のベアリング本体を載
せる。これらベアリング本体を、テーブル等の移動物体
に固定する。直線往復運動させようとする対象物は、こ
の移動物体上に取り付けられる。A typical use of such a linear motion bearing is as follows. First, a pair of bearings for linear motion bearings are installed substantially parallel to the mounting surface. One or a plurality of saddle-shaped bearing bodies are mounted on each way through a number of balls. These bearing bodies are fixed to a moving object such as a table. An object to be linearly reciprocated is mounted on the moving object.
【０００４】[0004]
【発明が解決しようとする課題】上述のようにテーブル
等の移動物体に固定された各直動軸受用軌道台に嵌着さ
れた鞍状のベアリング本体の間隔は、それらがテーブル
等の移動物体に固定されているため一定である。従っ
て、テーブル等の移動物体が滑らかに往復運動するため
には、一対の直動軸受用軌道台の間隔もストロークの全
領域において一定でなければならない。As described above, the spacing between the saddle-shaped bearing bodies fitted to the respective linear motion bearing raceways fixed to a moving object such as a table is determined by the distance between the saddle-shaped bearing bodies and the table. It is fixed because it is fixed to. Therefore, in order for a moving object such as a table to smoothly reciprocate, the distance between the pair of linear motion bearing rails must be constant throughout the stroke.
【０００５】しかしながら、一対の直動軸受用軌道台の
平行性は種々の理由により損なわれる。例えば、取付面
そのものの精度が悪かったり、取付ボルトを不規則に締
付けたり或いは締付け順序が悪かったりというだけでも
ミクロン単位のズレが生じる。直動軸受用軌道台が精密
に平行でないと、直動軸受の動きは滑らかでなくなり、
移動物体の運動精度が損なわれる。[0005] However, the parallelism of the pair of linear bearing bearing ways is impaired for various reasons. For example, even if the accuracy of the mounting surface itself is poor, the mounting bolts are tightened irregularly, or the tightening order is poor, deviations in microns occur. If the bearing for linear motion bearing is not precisely parallel, the motion of linear motion bearing will not be smooth,
The motion accuracy of the moving object is impaired.
【０００６】[0006]
【課題を解決するための手段】本発明は、上記従来技術
を背景にして、その欠点を解消すること、すなわち、た
とえ一対の軌道台自体は精密な意味で平行でなくても、
直動軸受の動きは滑らかとすることができる直動軸受用
中空軌道台を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned background art to solve the drawback, that is, even if a pair of rails are not precisely parallel,
An object of the present invention is to provide a hollow bearing base for a linear motion bearing in which the motion of the linear motion bearing can be made smooth.
【０００７】本発明は、軸方向に形成した複数の転走溝
を外周面上に有し、転走溝に沿って走行する多数のボー
ルを介して鞍状のベアリング本体を堯動自在に支持する
長尺の直動軸受用中空軌道台であって、弾性限度内で変
形して２列平行誤差を吸収し得る程度に薄肉とされた中
空構造の筒状体より構成されていることを特徴とするAccording to the present invention, a plurality of rolling grooves formed in an axial direction are provided on an outer peripheral surface, and a saddle-shaped bearing body is movably supported via a large number of balls running along the rolling grooves. A long linear bearing for a linear motion bearing, comprising a hollow cylindrical body that is deformed within the elastic limit and is thin enough to absorb a two-row parallel error. To be
【０００８】。[0008]
【作用】本発明の直動軸受用中空軌道台は、もちろん、
鞍状のベアリング本体、複数のボールを介して負荷され
る荷重、モーメント、あるいは衝撃に耐え得る程度の剛
性を有している。本発明の直動軸受用中空軌道台は、ま
た、薄肉中空構造の筒状体としたことから、所定の剛性
を保持しながら水平方向に撓むことができる。従って、
対をなすベアリング本体が直動軸受用中空軌道台に沿っ
て移動してきた時、ミクロン単位の平行性のズレは、そ
の弾性限度内の変形により吸収される。The hollow raceway for a linear motion bearing of the present invention, of course,
The saddle-shaped bearing body has a rigidity enough to withstand a load, a moment or an impact applied through a plurality of balls. Since the hollow raceway for a linear motion bearing of the present invention is a cylindrical body having a thin hollow structure, it can bend in a horizontal direction while maintaining a predetermined rigidity. Therefore,
As the paired bearing bodies move along the linear bearing hollow track, the deviations in micron parallelism are absorbed by deformations within their elastic limits.
【０００９】[0009]
【実施例】以下、本発明の直動軸受用中空軌道台を、図
面を参照して詳細に説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a linear bearing for a linear motion bearing according to the present invention.
【００１０】図１及び図２に示すように、一対の直動軸
受用中空軌道台１、１を取付面２にボルト４とテーパー
ギブ３を用いてほぼ平行に設置する。一対の直動軸受用
中空軌道台１、１を取付面２にほぼ平行に設置する方式
としては、幾つかの方式が提案されている。例えば、ス
トレートエッジによる方法、テーブルの走りによる方
法、基準側の直動軸受用中空軌道台１に倣わす方法、或
いは治具による方法がある。各直動軸受用中空軌道台１
には、それぞれ、２つのベアリング本体５、５が多数の
ボール６を介して堯動自在に装着されている。合計４つ
のベアリング本体５は、適当な手段を用いてテーブル７
の下面に固定される。As shown in FIG. 1 and FIG. 2, a pair of hollow raceways 1 for linear motion bearings 1 and
It is installed almost in parallel using a give 3 . Several methods have been proposed as a method of installing the pair of linear motion bearing hollow raceways 1 and 1 substantially parallel to the mounting surface 2. For example, there are a method using a straight edge, a method using a table running, a method following the hollow bearing way 1 for a linear motion bearing on the reference side, and a method using a jig. Hollow way 1 for each linear bearing
, Two bearing bodies 5 are respectively movably mounted via a number of balls 6. A total of four bearing bodies 5 are mounted on the table 7 using suitable means.
Is fixed to the lower surface of the.
【００１１】本発明の直動軸受用中空軌道台１は、図２
に最もよく図示されているように、中空構造の筒状体よ
り構成されている。筒状体は、図示された好ましい実施
例では一体構造をなしており、縦方向に長い長方形断面
を有している。従って、例えば、直動軸受用中空軌道台
１が横方向の外力を受けると、２点鎖線で描いたよう
に、その弾性限度内で変形する。そして、外力がなくな
ると、実線で描いたもとの位置に復帰する。一方、直動
軸受用中空軌道台１が縦方向の外力を受けると、この外
力は薄い肉厚部を介して取付面２に支持される。中空構
造の筒状体は、断面面積に対する剛性が極めて高い構造
であるから、所望の剛性を維持しつつかなり薄い肉厚の
筒状体とすることができる。FIG. 2 is a perspective view of a hollow bearing base 1 for a linear bearing according to the present invention.
As best shown in FIG. 1, it is composed of a hollow cylindrical body. The tubular body is of unitary construction in the illustrated preferred embodiment and has a longitudinally elongated rectangular cross section. Accordingly, for example, when the hollow linear bearing 1 for a linear motion bearing receives a lateral external force, it is deformed within its elastic limit as depicted by a two-dot chain line. Then, when the external force disappears, it returns to the original position drawn by the solid line. On the other hand, when the hollow linear bearing 1 for a linear motion bearing receives an external force in the vertical direction, the external force is supported by the mounting surface 2 via the thin thick portion. Since the cylindrical body having the hollow structure has a structure with extremely high rigidity with respect to the cross-sectional area, the cylindrical body having a considerably small thickness can be obtained while maintaining the desired rigidity.
【００１２】直動軸受用中空軌道台１の中空部分に、冷
却水、クーラント等の冷却媒体を直接、或いはヒートパ
イプを挿入することができる。これにより、温度変化に
よる直動軸受用中空軌道台１の変形を回避することがで
きる。A cooling medium such as cooling water or a coolant can be inserted directly into a hollow portion of the linear bearing 1 for a linear motion bearing, or a heat pipe can be inserted. Thereby, deformation of the linear bearing hollow raceway 1 due to a temperature change can be avoided.
【００１３】各直動軸受用中空軌道台１は、また、その
外周面に片側面２列、合計４列の転走溝８を有してい
る。各転走溝８の表面は、高周波焼入れ、浸炭焼入れ等
の表面処理がなされている。Each of the linear bearings 1 has a plurality of rolling grooves 8 on its outer peripheral surface, two rows on one side, that is, four rows in total. The surface of each rolling groove 8 is subjected to a surface treatment such as induction hardening and carburizing hardening.
【００１４】図１を参照すると、一対の直動軸受用中空
軌道台１、１が取付面２にほぼ平行に設置される。一対
の直動軸受用中空軌道台１、１のミクロンオーダの間隔
の相違をＸとする。テーブル７が矢印の方向に移動した
時、各直動軸受用中空軌道台１に装着されたベアリング
本体５、５は、各直動軸受用中空軌道台１に横方向の負
荷を加える。これにより、各直動軸受用中空軌道台１
は、図２のように、横方向に撓み、ミクロンオーダの間
隔の相違Ｘを吸収する。従って、ベアリング本体５、５
は、大きな影響を受けること無く直動軸受用中空軌道台
１、１上を滑らかに走行することができる。テーブル７
が通り過ぎると、直動軸受用中空軌道台１、１は元の位
置に復帰して、次のテーブル７の通過を待つ。Referring to FIG. 1, a pair of hollow linear bearings 1 for linear motion bearings 1 are installed substantially parallel to a mounting surface 2. X is the difference in the micron-order spacing of the pair of linear bearing hollow raceways 1, 1. When the table 7 moves in the direction of the arrow, the bearing bodies 5 and 5 mounted on the respective linear bearing hollow raceways 1 apply a lateral load to the respective linear bearing hollow raceways 1. As a result, each of the linear bearings 1
2 deflects laterally as shown in FIG. 2 and absorbs the difference X in the spacing on the order of microns. Therefore, the bearing bodies 5, 5
Can smoothly travel on the linear bearing hollow rails 1 and 1 without being greatly affected. Table 7
Passes, the linear bearing hollow bearing ways 1 and 1 return to their original positions and wait for the next table 7 to pass.
【００１５】図３及び図４は、それぞれ、本発明に係る
直動軸受用中空軌道台の他の実施例を示している。図示
されているように、これら実施例において直動軸受用中
空軌道台の中空部の断面形状は、それぞれ、円形及び楕
円形とされている。FIGS. 3 and 4 show other embodiments of the linear bearing for a linear motion bearing according to the present invention. As shown in these figures, in these embodiments, the cross-sectional shapes of the hollow portions of the hollow linear bearings for linear motion bearings are circular and elliptical, respectively.
【００１６】[0016]
【発明の効果】以上述べたように、本発明の直動軸受用
中空軌道台は、弾性限度内で変形して２列平行誤差を吸
収し得る程度に薄肉とされた中空構造の筒状体より構成
したことにより、所定の剛性を保持しながら水平方向に
撓むことができる。従って、対をなすベアリング本体が
直動軸受用中空軌道台に沿って移動すると、ミクロン単
位の平行性のズレは、その弾性限度内の変形により吸収
される。これにより、ベアリング本体は、直動軸受用中
空軌道台の全ストロークに亘って滑らかに走行すること
ができる。As described above, the hollow raceway for a linear motion bearing according to the present invention has a hollow structure having a hollow structure thin enough to be deformed within the elastic limit and to absorb a two-row parallel error. With this configuration, it is possible to bend in the horizontal direction while maintaining a predetermined rigidity. Thus, as the paired bearing bodies move along the linear bearing hollow track, deviations in parallelism in microns are absorbed by deformation within their elastic limits. Accordingly, the bearing body can smoothly travel over the entire stroke of the linear bearing hollow raceway.
【図１】 代表的な直動軸受の設置状態の平面図であ
る。FIG. 1 is a plan view of a typical linear motion bearing in an installed state.
【図２】 本発明に係る直動軸受用中空軌道台の一実施
例を含む直動軸受の横断面図であり、図の見易さのため
に、ベアリング本体の右側は省略されている。FIG. 2 is a cross-sectional view of a linear motion bearing including one embodiment of a linear raceway for a linear motion bearing according to the present invention, and the right side of the bearing main body is omitted for easy viewing of the drawing.
【図３】 本発明に係る直動軸受用中空軌道台の他の実
施例の横断面図である。FIG. 3 is a cross-sectional view of another embodiment of the hollow raceway for a linear motion bearing according to the present invention.
【図４】 本発明に係る直動軸受用中空軌道台のさらに
他の実施例の横断面図である。FIG. 4 is a cross-sectional view of still another embodiment of the hollow bearing ring for a linear motion bearing according to the present invention.
１ 直動軸受用中空軌道台 ２ 取付面３ テーパーギブ ４ ボルト ５ ベアリング本体 ６ ボール ７ テーブル ８ 転走溝 1 Hollow way for linear motion bearing 2 Mounting surface3 Taper give 4 bolts 5 Bearing body 6 Ball 7 Table 8 Rolling groove
Claims (4)
上に有し、前記転走溝に沿って走行する多数のボールを
介して鞍状のベアリング本体を堯動自在に支持する長尺
の直動軸受用中空軌道台であって、 弾性限度内で変形して２列平行誤差を吸収し得る程度に
薄肉とされた中空構造の筒状体より構成されていること
を特徴とする直動軸受用中空軌道台。1. A plurality of rolling grooves formed in an axial direction on an outer peripheral surface, and a saddle-shaped bearing main body is movably supported via a number of balls running along the rolling grooves. A hollow bearing ring for a long linear motion bearing, comprising a hollow cylindrical body having a thickness small enough to deform within an elastic limit and to absorb a two-row parallel error. Bearing way for linear motion bearings.
の構造をさらに備えている請求項１に記載の直動軸受用
中空軌道台。2. The hollow raceway for a linear motion bearing according to claim 1, further comprising a structure for directly passing a cooling medium through the hollow portion.
なる請求項１に記載の直動軸受用中空軌道台。3. The linear bearing for a linear motion bearing according to claim 1, wherein a heat pipe is inserted into the hollow portion.
方形をなしている請求項１から請求項３のいずれかに記
載の直動軸受用中空軌道台。4. The linear bearing for a linear motion bearing according to claim 1, wherein a cross section of the cylindrical body is basically a vertically long rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7558691A JP2632445B2 (en) | 1991-03-15 | 1991-03-15 | Hollow way for linear motion bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7558691A JP2632445B2 (en) | 1991-03-15 | 1991-03-15 | Hollow way for linear motion bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05321932A JPH05321932A (en) | 1993-12-07 |
| JP2632445B2 true JP2632445B2 (en) | 1997-07-23 |
Family
ID=13580454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7558691A Expired - Lifetime JP2632445B2 (en) | 1991-03-15 | 1991-03-15 | Hollow way for linear motion bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2632445B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10328336A1 (en) * | 2003-06-24 | 2005-01-13 | Rexroth Star Gmbh | Linear guide device with longitudinal guide rail, includes retaining unit concealed by cover unit which is supported with longitudinal edge in undercut of guide rail |
| JP4732170B2 (en) * | 2004-02-18 | 2011-07-27 | ホーコス株式会社 | Linear motion guide device for machine tools |
| DE102004031497A1 (en) * | 2004-06-30 | 2006-05-18 | Schaeffler Kg | Rail system |
| JP5192948B2 (en) * | 2008-09-09 | 2013-05-08 | Ｔｈｋ株式会社 | Exercise guidance device |
| JP6153345B2 (en) * | 2013-02-28 | 2017-06-28 | Thk株式会社 | Motion guide device and rail for motion guide device |
| JP6379151B2 (en) | 2016-10-20 | 2018-08-22 | Thk株式会社 | Exercise guidance device |
-
1991
- 1991-03-15 JP JP7558691A patent/JP2632445B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05321932A (en) | 1993-12-07 |
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