JP2007303556A - Linear motion guide device - Google Patents

Linear motion guide device Download PDF

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Publication number
JP2007303556A
JP2007303556A JP2006132636A JP2006132636A JP2007303556A JP 2007303556 A JP2007303556 A JP 2007303556A JP 2006132636 A JP2006132636 A JP 2006132636A JP 2006132636 A JP2006132636 A JP 2006132636A JP 2007303556 A JP2007303556 A JP 2007303556A
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rolling element
rolling
slider
return
linear motion
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JP2006132636A
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JP2007303556A5 (en
JP4661683B2 (en
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Nobuhide Kurachi
信秀 倉知
Yoshinori Mizumura
美典 水村
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NSK Ltd
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NSK Ltd
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Priority to JP2006132636A priority Critical patent/JP4661683B2/en
Priority to EP06746351A priority patent/EP1881214A1/en
Priority to US11/793,455 priority patent/US7862235B2/en
Priority to PCT/JP2006/309604 priority patent/WO2006121167A1/en
Priority to CN2006800013414A priority patent/CN101069025B/en
Publication of JP2007303556A publication Critical patent/JP2007303556A/en
Publication of JP2007303556A5 publication Critical patent/JP2007303556A5/ja
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a linear motion guide device capable of reducing the number of parts and the cost of the device. <P>SOLUTION: In this linear motion guide device constituted by inserting a rolling-body return passage constituting member into a through passage for returning a rolling body in a slider body, two return guides 21 incorporated into an upper part and a lower part of an end cap among a plurality of return guides are molded integrally with the rolling body return passage constituting member 24 by resin. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、たとえば工作機械などの産業機械においてリニアガイドとして用いられる直動案内装置に関する。   The present invention relates to a linear motion guide device used as a linear guide in an industrial machine such as a machine tool.

工作機械などの産業機械においてリニアガイドとして用いられる直動案内装置は、直線状に形成された案内レールと、案内レールの長手方向に相対移動するスライダと、スライダ内に転動自在に組み込まれた多数の転動体とを備えた構成となっている。そして、スライダは案内レール上に形成された複数のレール側転動体転動溝と各々対向する複数のスライダ側転動体転動溝を有するスライダ本体と、案内レールの長手方向に沿ってスライダ本体内に貫設された複数の転動体戻し用貫通路を閉塞するようにスライダ本体の一端と他端に装着された一対のエンドキャップと、レール側転動体転動溝とスライダ側転動体転動溝との間に形成された転動体負荷転動路と転動体戻し用貫通路の双方に連通する湾曲路をエンドキャップとの間に形成する複数のリターンガイドとを含んでいる。   A linear motion guide device used as a linear guide in an industrial machine such as a machine tool, a linearly formed guide rail, a slider that moves relative to the longitudinal direction of the guide rail, and a roll that is incorporated into the slider. It is the structure provided with many rolling elements. The slider includes a slider body having a plurality of slider-side rolling element rolling grooves facing the plurality of rail-side rolling element rolling grooves formed on the guide rail, and a slider body along the longitudinal direction of the guide rail. A pair of end caps attached to one end and the other end of the slider body so as to block a plurality of rolling element return through passages penetrating the rail, a rail-side rolling element rolling groove, and a slider-side rolling element rolling groove And a plurality of return guides formed between the end cap and a curved path communicating with both the rolling element load rolling path and the rolling element return through path.

このような直動案内装置は、転動体負荷転動路や転動体戻し用貫通路あるいは湾曲路内で転動体同士の干渉が生じると、振動が発生したり転動体が損傷したりすることがある。そこで、転動体の間隔を転動体同士が干渉し合わない間隔に保持するベルト状間隔保持部材を転動体の循環経路に組み込んで転動体同士の干渉を防止するようにしたものが知られている（例えば、特許文献１参照）。
特開平１１−７２１１９号公報 Such a linear motion guide device may generate vibrations or damage the rolling element when the rolling elements interfere with each other in the rolling element load rolling path, the rolling element return through path, or the curved path. is there. Therefore, a belt-like interval holding member that holds the interval between the rolling elements at an interval at which the rolling elements do not interfere with each other is incorporated in the circulation path of the rolling elements to prevent interference between the rolling elements. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 11-72119

しかしながら、上記文献１に記載されたものは、転動体負荷転動路構成部とリターンガイド及び転動体戻し通路構成部材とが一体化された樹脂成形品をスライダ本体に組み込んで構成されている。このため、樹脂成形品をスライダ本体の一端側から組み込む場合に、スライダ本体の他端側に少なくとも二つの別部品を必要とし、部品点数の増加を招くという問題があった。また、樹脂成形品を長手方向の途中で二つに分割した場合は、二つに分割された転動体戻し通路構成部材をスライダの中央付近で接続することになるため、転動体の循環路内に段差が生じないように二つの転動体戻し通路構成部材を接合させることは困難であり、さらにその確認も困難であるという問題がある。
本発明は上述した問題点に着目してなされたものであり、その目的は、部品点数の削減とコストの低減を図ることのできる直動案内装置を提供することにある。 However, what is described in the above-mentioned document 1 is configured by incorporating a resin molded product in which a rolling element load rolling path constituting portion, a return guide, and a rolling element return passage constituting member are integrated into a slider body. For this reason, when the resin molded product is incorporated from one end side of the slider body, there is a problem that at least two separate parts are required on the other end side of the slider body, resulting in an increase in the number of parts. In addition, when the resin molded product is divided into two in the middle of the longitudinal direction, the divided rolling element return passage constituting member is connected near the center of the slider. There is a problem that it is difficult to join the two rolling element return passage members so that no step is generated, and that it is also difficult to confirm.
The present invention has been made paying attention to the above-mentioned problems, and an object thereof is to provide a linear motion guide device capable of reducing the number of parts and the cost.

上記の目的を達成するために、請求項１の発明に係る直動案内装置は、直線状に形成された案内レールと、該案内レールの長手方向に相対移動するスライダと、該スライダ内に転動自在に組み込まれた多数の転動体とを具備し、前記スライダが前記案内レール上に形成された複数のレール側転動体転動溝と各々対向する複数のスライダ側転動体転動溝及び該スライダ側転動体転動溝と平行に形成された複数の転動体戻し用貫通路を有するスライダ本体と、前記転動体戻し用貫通路を閉塞するように前記スライダ本体に装着された一対のエンドキャップと、前記レール側転動体転動溝と前記スライダ側転動体転動溝との間に形成された転動体負荷転動路及び前記転動体戻し用貫通路の双方に連通する湾曲路を前記エンドキャップとの間に形成する複数のリターンガイドと、前記転動体戻し用貫通路内に挿入された複数の転動体戻し通路構成部材とを含む直動案内装置であって、前記複数のリターンガイドのうちエンドキャップの上部と下部に組み込まれる二つのリターンガイドが前記転動体戻し通路構成部材と一体に樹脂成形されていることを特徴とする。   In order to achieve the above object, a linear motion guide device according to the invention of claim 1 includes a linearly formed guide rail, a slider that relatively moves in the longitudinal direction of the guide rail, and a roller that moves into the slider. A plurality of rolling elements incorporated in a freely movable manner, and a plurality of slider-side rolling elements rolling grooves each opposed to a plurality of rail-side rolling elements rolling grooves formed on the guide rail. A slider main body having a plurality of rolling element return through passages formed in parallel with the slider-side rolling element rolling grooves, and a pair of end caps attached to the slider main body so as to close the rolling element return through passages And a curved path communicating with both the rolling element load rolling path and the rolling element return through path formed between the rail side rolling element rolling groove and the slider side rolling element rolling groove. Form between the cap A linear motion guide device including a plurality of return guides and a plurality of rolling element return passage members inserted into the rolling element return through passage, wherein an upper portion and a lower portion of an end cap of the plurality of return guides The two return guides incorporated into the rolling element are molded integrally with the rolling member return passage constituting member.

請求項２の発明に係る直動案内装置は、請求項１記載の直動案内装置において、前記転動体戻し通路構成部材が半円筒形状をなしていることを特徴とする。
請求項３の発明に係る直動案内装置は、請求項１または２記載の直動案内装置において、前記転動体戻し通路構成部材が前記スライダ本体の一端と他端から上下の転動体戻し用貫通路に互いに補完し合うように挿入され、該転動体戻し通路構成部材の端部がスライダ本体の端部近くになるように構成されていることを特徴とする。 A linear motion guide device according to a second aspect of the present invention is the linear motion guide device according to the first aspect, wherein the rolling element return passage constituting member has a semi-cylindrical shape.
According to a third aspect of the present invention, there is provided the linear motion guide device according to the first or second aspect, wherein the rolling element return passage constituting member is vertically penetrated from one end and the other end of the slider body to the upper and lower rolling bodies. The rolling element return path constituting member is inserted into the path so as to complement each other, and the end of the rolling element return path constituting member is configured to be close to the end of the slider body.

本発明に係る直動案内装置によれば、転動体の転がり運動を阻害するような段差を発生させることなく転動体戻し用貫通路と湾曲路とを接続でき、その確認も容易である上、形状が単純で１種類の部品で転動体循環路の一部を構成できるので、部品点数の削減とコストの低減を図ることができる。   According to the linear motion guide device according to the present invention, it is possible to connect the rolling element returning through-passage and the curved path without generating a step that inhibits the rolling motion of the rolling element, and the confirmation thereof is easy. Since the shape is simple and a part of the rolling element circulation path can be constituted by one kind of parts, the number of parts and the cost can be reduced.

以下、図１〜図８を参照して本発明の第１の実施形態について説明する。
図１において符号１０は本発明の第１の実施形態に係る直動案内装置であって、この直動案内装置１０は直線状に形成された案内レール１１と、案内レール１１の長手方向に相対移動するスライダ１２と、スライダ１２内に転動自在に組み込まれた多数の転動体１３（図２参照）とから構成されている。 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1, reference numeral 10 denotes a linear motion guide device according to the first embodiment of the present invention. The linear motion guide device 10 has a linear guide rail 11 and a relative length in the longitudinal direction of the guide rail 11. The slider 12 is configured to move, and a large number of rolling elements 13 (see FIG. 2) incorporated in the slider 12 so as to freely roll.

案内レール１１は全部で四条のレール側転動体転動溝１４（図３参照）を有しており、これらのレール側転動体転動溝１４のうち二条のレール側転動体転動溝１４は案内レール１１の左右側面部に形成され、残りの二条のレール側転動体転動溝１４は案内レール１１の左右側面部と上面部との交叉部に形成されている。
スライダ１２は鋼などの金属材料からなるスライダ本体１５を備えており、このスライダ本体１５には、レール側転動体転動溝１４と各々対向する四つのスライダ側転動体転動溝１６（図３参照）が設けられているとともに、スライダ側転動体転動溝１６と平行な四つの転動体戻し用貫通路１７（図２参照）が設けられている。 The guide rail 11 has four rail-side rolling element rolling grooves 14 (see FIG. 3) in total. Of these rail-side rolling element rolling grooves 14, two rail-side rolling element rolling grooves 14 are The remaining two rail-side rolling element rolling grooves 14 are formed at the intersection of the left and right side surface portions and the upper surface portion of the guide rail 11.
The slider 12 includes a slider main body 15 made of a metal material such as steel. The slider main body 15 includes four slider-side rolling element rolling grooves 16 (see FIG. 3) respectively facing the rail-side rolling element rolling grooves 14. 4), and four through-roller return passages 17 (see FIG. 2) parallel to the slider-side rolling element rolling grooves 16 are provided.

また、スライダ１２は転動体戻し用貫通路１７を閉塞するようにスライダ本体１５の一端と他端に装着された一対のエンドキャップ１８を備えており、エンドキャップ１８内には、レール側転動体転動溝１４とスライダ側転動体転動溝１６との間に形成された転動体負荷転動路１９（図２参照）及び転動体戻し用貫通路１７の双方に連通する湾曲路２０をエンドキャップ１８との間に形成する四つのリターンガイド２１（図２参照）がそれぞれ組み込まれている。さらに、スライダ１２はレール側転動体転動溝１４とスライダ側転動体転動溝１６との間に介在する転動体１３を保持する二つの転動体保持器２２（図３参照）を備えており、これらの転動体保持器２２は合成樹脂材から形成されている。   Further, the slider 12 includes a pair of end caps 18 attached to one end and the other end of the slider body 15 so as to close the rolling element return through-passage 17. End of curved path 20 communicating with both rolling element load rolling path 19 (see FIG. 2) and rolling element return through path 17 formed between rolling groove 14 and slider-side rolling element rolling groove 16 Four return guides 21 (see FIG. 2) formed between the cap 18 and the cap 18 are incorporated. Further, the slider 12 includes two rolling element holders 22 (see FIG. 3) for holding the rolling elements 13 interposed between the rail-side rolling element rolling grooves 14 and the slider-side rolling element rolling grooves 16. These rolling element holders 22 are made of a synthetic resin material.

また、スライダ１２は転動体１３の間隔を転動体同士が互いに干渉し合わない間隔に保持する四本のベルト状間隔保持部材２３（図２及び図３参照）を備えており、これらのベルト状間隔保持部材２３は熱可塑性エラストマなどの軟質材から形成されている。さらに、スライダ１２は半円筒形状をなす四つの転動体戻し通路構成部材２４（図２及び図３参照）を備えており、これらの転動体戻し通路構成部材２４はそれぞれ転動体戻し用貫通路１７内に挿入されている。
転動体１３は球形状をなしており、スライダ１２が案内レール１１の長手方向に相対移動すると、上述した転動体負荷転動路１９、転動体戻し用貫通路１７及び湾曲路２０を転動するようになっている。 Further, the slider 12 includes four belt-like interval holding members 23 (see FIGS. 2 and 3) for holding the interval between the rolling elements 13 at an interval at which the rolling elements do not interfere with each other. The spacing member 23 is made of a soft material such as a thermoplastic elastomer. Further, the slider 12 is provided with four rolling element return passage constituting members 24 (see FIGS. 2 and 3) having a semi-cylindrical shape, and these rolling element return passage constituting members 24 are respectively provided with the rolling element return through passage 17. Has been inserted inside.
The rolling element 13 has a spherical shape. When the slider 12 moves relative to the longitudinal direction of the guide rail 11, the rolling element 13 rolls on the rolling element load rolling path 19, the rolling element returning through path 17, and the curved path 20. It is like that.

転動体保持器２２は案内レール１１の長手方向に延びる転動体保持部２２１，２２２，２２３（図４参照）を有しており、レール側転動体転動溝１４とスライダ側転動体転動溝１６との間に介在する転動体１３は転動体保持器２２の転動体保持部２２１，２２２，２２３によってスライダ１２からの脱落が防止されている。また、転動体保持器２２は転動体保持部２２１，２２２，２２３の両端部に一対のプレート部２２４を有しており、これらのプレート部２２４には、転動体戻し用貫通路１７と湾曲路２０とを接続する二つの通路接続孔２２５（図４参照）が設けられている。   The rolling element holder 22 has rolling element holding portions 221, 222, and 223 (see FIG. 4) extending in the longitudinal direction of the guide rail 11, and the rail side rolling element rolling groove 14 and the slider side rolling element rolling groove. The rolling element 13 interposed between the slider 16 and the rolling element holder 22 is prevented from falling off the slider 12 by the rolling element holders 221, 222, and 223 of the rolling element holder 22. Further, the rolling element holder 22 has a pair of plate parts 224 at both ends of the rolling element holding parts 221, 222, and 223. The plate part 224 includes a rolling element return through passage 17 and a curved path. Two passage connection holes 225 (see FIG. 4) are provided.

ベルト状間隔保持部材２３は、転動体１３を収容する多数の転動体収容孔２３１（図５及び図６参照）を有している。これらの転動体収容孔２３１は転動体１３の直径より大きいピッチでベルト状間隔保持部材２３に穿設されており、隣り合う二つの転動体収容孔２３１，２３１の間には、転動体同士の干渉を防止するスペーサ２３２がベルト状間隔保持部材２３と一体に形成されている。
転動体戻し通路構成部材２４は、合成樹脂材から形成されている。また、転動体戻し通路構成部材２４は長手方向と直交する断面が三日月状に形成されており、各転動体戻し通路構成部材２４の一端には、図７に示すように、エンドキャップ１８の上部と下部に組み込まれる二つのリターンガイド２１が転動体戻し通路構成部材２４と一体に樹脂成形されている。 The belt-shaped interval holding member 23 has a large number of rolling element accommodation holes 231 (see FIGS. 5 and 6) for accommodating the rolling elements 13. These rolling element accommodation holes 231 are formed in the belt-shaped interval holding member 23 at a pitch larger than the diameter of the rolling elements 13, and between the adjacent two rolling element accommodation holes 231, 231, the rolling elements are in contact with each other. A spacer 232 for preventing interference is formed integrally with the belt-shaped interval holding member 23.
The rolling element return passage constituting member 24 is made of a synthetic resin material. Further, the rolling element return passage constituting member 24 has a crescent-shaped cross section perpendicular to the longitudinal direction, and one end of each rolling element return passage constituting member 24 has an upper portion of the end cap 18 as shown in FIG. The two return guides 21 incorporated in the lower part are integrally molded with the rolling element return path constituting member 24 by resin molding.

このような構成において、図８に示すように、リターンガイド２１と一体に樹脂成形された転動体戻し通路構成部材２４をリターンガイド２１がスライダ本体１５の端面に当接するまで転動体戻し用貫通路１７に挿入すると、リターンガイド２１が樹脂成形されていないほうの転動体戻し通路構成部材２４の端部がスライダ本体１５の端面近くに位置することになる。これにより、転動体１３の転がり運動を阻害するような段差を発生させることなく転動体戻し用貫通路１７と湾曲路２０とを接続でき、その確認も容易である上、形状が単純で１種類の部品で転動体循環路の一部を構成できるので、部品点数の削減とコストの低減を図ることができる。
なお、上述した第１実施形態では転動体戻し用貫通路１７に挿入される転動体戻し通路構成部材２４として半円筒状のものを例示したが、図９に示すように、円筒形状をなす転動体戻し通路構成部材２４を転動体戻し用貫通路１７に挿入しても同様の効果を得ることができる。 In such a configuration, as shown in FIG. 8, the rolling element return passage constituting member 24 integrally molded with the return guide 21 is inserted into the rolling element return through path until the return guide 21 contacts the end surface of the slider body 15. 17, the end portion of the rolling element return passage constituting member 24 on which the return guide 21 is not resin-molded is positioned near the end surface of the slider body 15. Accordingly, the rolling element return through-passage 17 and the curved path 20 can be connected without generating a step that impedes the rolling motion of the rolling element 13, and the confirmation thereof is easy, and the shape is simple and has one type. Since a part of the rolling element circulation path can be configured with these parts, the number of parts and the cost can be reduced.
In the above-described first embodiment, the rolling element return passage constituting member 24 inserted into the rolling element return through passage 17 is exemplified as a semi-cylindrical member. However, as shown in FIG. The same effect can be obtained even if the moving body return passage constituting member 24 is inserted into the rolling body return through passage 17.

本発明の第１の実施形態に係る直動案内装置の斜視図である。1 is a perspective view of a linear guide apparatus according to a first embodiment of the present invention. 図１に示す直動案内装置の平面図である。It is a top view of the linear motion guide apparatus shown in FIG. 図２のIII−III線に沿う断面図である。It is sectional drawing which follows the III-III line of FIG. 図３に示す転動体保持器の斜視図である。It is a perspective view of the rolling element holder | retainer shown in FIG. 図３に示すベルト状間隔保持部材の平面図である。It is a top view of the belt-shaped space | interval holding member shown in FIG. 図５のVI−VI線に沿う断面図である。It is sectional drawing which follows the VI-VI line of FIG. 図３に示す転動体戻し通路構成部材の側面図と正面図である。FIG. 4 is a side view and a front view of the rolling element return path constituent member shown in FIG. 3. 本発明の第１の実施形態に係る直動案内装置の作用効果を説明するための図である。It is a figure for demonstrating the effect of the linear motion guide apparatus which concerns on the 1st Embodiment of this invention. 本発明の第２の実施形態に係る直動案内装置の断面図である。It is sectional drawing of the linear motion guide apparatus which concerns on the 2nd Embodiment of this invention.

符号の説明Explanation of symbols

１１ 案内レール
１２ スライダ
１３ 転動体
１４ レール側転動体転動溝
１５ スライダ本体
１６ スライダ側転動体転動溝
１７ 転動体戻し用貫通路
１８ エンドキャップ
１９ 転動体負荷転動路
２０ 湾曲路
２１ リターンガイド
２２ 転動体保持器
２３ ベルト状間隔保持部材
２４ 転動体戻し通路構成部材 DESCRIPTION OF SYMBOLS 11 Guide rail 12 Slider 13 Rolling body 14 Rail side rolling element rolling groove 15 Slider main body 16 Slider side rolling element rolling groove 17 Rolling body return through path 18 End cap 19 Rolling body load rolling path 20 Curved path 21 Return guide DESCRIPTION OF SYMBOLS 22 Rolling body holder 23 Belt-like space | interval holding member 24 Rolling body return path component

Claims (3)

直線状に形成された案内レールと、該案内レールの長手方向に相対移動するスライダと、該スライダ内に転動自在に組み込まれた多数の転動体とを具備し、
前記スライダが前記案内レール上に形成された複数のレール側転動体転動溝と各々対向する複数のスライダ側転動体転動溝及び該スライダ側転動体転動溝と平行に形成された複数の転動体戻し用貫通路を有するスライダ本体と、前記転動体戻し用貫通路を閉塞するように前記スライダ本体に装着された一対のエンドキャップと、前記レール側転動体転動溝と前記スライダ側転動体転動溝との間に形成された転動体負荷転動路及び前記転動体戻し用貫通路の双方に連通する湾曲路を前記エンドキャップとの間に形成する複数のリターンガイドと、前記転動体戻し用貫通路内に挿入された複数の転動体戻し通路構成部材とを含む直動案内装置であって、
前記複数のリターンガイドのうちエンドキャップの上部と下部に組み込まれる二つのリターンガイドが前記転動体戻し通路構成部材と一体に樹脂成形されていることを特徴とする直動案内装置。 A linearly formed guide rail, a slider that relatively moves in the longitudinal direction of the guide rail, and a number of rolling elements that are rotatably incorporated in the slider,
A plurality of slider-side rolling element rolling grooves facing each of a plurality of rail-side rolling element rolling grooves formed on the guide rail and a plurality of slider-side rolling element rolling grooves formed in parallel with the slider-side rolling element rolling grooves. A slider body having a rolling element return through passage; a pair of end caps mounted on the slider body so as to close the rolling body return passage; the rail side rolling element rolling groove; and the slider side rolling passage. A plurality of return guides formed between the end cap and a curved path communicating with both the rolling element load rolling path formed between the rolling element rolling groove and the rolling element return through path; A linear motion guide device including a plurality of rolling element return passage components inserted into the moving body return through-passage,
A linear motion guide device, wherein two return guides incorporated in the upper part and the lower part of the end cap among the plurality of return guides are resin-molded integrally with the rolling element return passage constituting member. 前記転動体戻し通路構成部材が半円筒形状をなしていることを特徴とする請求項１記載の直動案内装置。   The linear motion guide device according to claim 1, wherein the rolling element return passage constituting member has a semi-cylindrical shape. 請求項１または２記載の直動案内装置において、前記転動体戻し通路構成部材は前記スライダ本体の一端と他端から上下の転動体戻し用貫通路に互いに補完し合うように挿入され、該転動体戻し通路構成部材の端部がスライダ本体の端部近くになるように構成されていることを特徴とする直動案内装置。   3. The linear motion guide device according to claim 1, wherein the rolling element return passage constituting member is inserted from one end and the other end of the slider body so as to complement each other in the upper and lower rolling element return passages. A linear motion guide device characterized in that an end portion of a moving member return passage constituting member is configured to be close to an end portion of a slider body.
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JP2006132636A JP4661683B2 (en) 2006-05-11 2006-05-11 Linear motion guide device
EP06746351A EP1881214A1 (en) 2005-05-12 2006-05-12 Linear guide device
US11/793,455 US7862235B2 (en) 2005-05-12 2006-05-12 Linear guide device
PCT/JP2006/309604 WO2006121167A1 (en) 2005-05-12 2006-05-12 Linear guide device
CN2006800013414A CN101069025B (en) 2005-05-12 2006-05-12 Linear guide device

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