JP4093172B2 - Linear motion guide bearing device - Google Patents

Linear motion guide bearing device Download PDF

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JP4093172B2
JP4093172B2 JP2003370977A JP2003370977A JP4093172B2 JP 4093172 B2 JP4093172 B2 JP 4093172B2 JP 2003370977 A JP2003370977 A JP 2003370977A JP 2003370977 A JP2003370977 A JP 2003370977A JP 4093172 B2 JP4093172 B2 JP 4093172B2
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rolling
rolling element
separator
arc
guide groove
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JP2005133842A (en
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▲うぇい▼ 徐
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NSK Ltd
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Description

本発明は、例えば工作機械や射出成形機等の産業機械分野等に用いられる直動案内軸受装置に関する。   The present invention relates to a linear motion guide bearing device used in an industrial machine field such as a machine tool or an injection molding machine.

従来のこの種の直動案内軸受装置としては、例えば図８に示すものが知られている。
この直動案内軸受装置は、軸方向に延びる案内レール１と、該案内レール１上に軸方向に相対移動可能に跨架されたスライダ２とを備えている。
案内レール１の幅方向の両側面にはそれぞれ軸方向に延びる転動体転動溝３が片側二条列ずつ、合計４条列形成されており、スライダ２のスライダ本体２Ａには、その両袖部４の内側面にそれぞれ転動体転動溝３に対向する転動体転動溝５が形成されている。 As a conventional linear guide bearing device of this type, for example, the one shown in FIG. 8 is known.
This linear motion guide bearing device includes a guide rail 1 extending in the axial direction and a slider 2 straddling the guide rail 1 so as to be relatively movable in the axial direction.
On both side surfaces of the guide rail 1 in the width direction, rolling element rolling grooves 3 extending in the axial direction are formed in two rows on one side, for a total of four rows. The slider body 2A of the slider 2 has both sleeve portions. On the inner surface of 4, rolling element rolling grooves 5 that face the rolling element rolling grooves 3 are formed.

両転動体転動溝３，５の間には転動体としての多数の円筒ころ６が転動自在に装填され、これらの円筒ころ６の転動を介してスライダ２が案内レール１上を軸方向に沿って相対移動できるようになっている。
この移動につれて、案内レール１とスライダ２との間に介在する円筒ころ６は転動してスライダ２の軸方向の端部に移動するが、スライダ２を軸方向に継続移動させていくためには、これらの円筒ころ６を無限に循環させる必要がある。 A large number of cylindrical rollers 6 as rolling elements are movably loaded between the rolling grooves 3 and 5 of the rolling elements, and the slider 2 pivots on the guide rail 1 through the rolling of these cylindrical rollers 6. Relative movement along the direction is possible.
Along with this movement, the cylindrical roller 6 interposed between the guide rail 1 and the slider 2 rolls and moves to the end of the slider 2 in the axial direction, but the slider 2 continues to move in the axial direction. Needs to circulate these cylindrical rollers 6 indefinitely.

このため、スライダ本体２Ａの袖部４内に更に軸方向に貫通する孔７を形成して該孔７に内部が円筒ころ６の通路（転動体通路）８ａとされた循環チューブ８を嵌め込むと共に、スライダ本体２Ａの軸方向の両端にそれぞれ転動体循環部品としての一対のエンドキャップ９をねじ等を介して固定し、このエンドキャップ９に上記両転動体転動溝３，５間と上記転動体通路８ａとを連通する円弧状に湾曲した方向転換路１０（図９参照）を形成することにより、円筒ころ６の無限循環軌道を形成している。
ところで、無限循環する多数の円筒ころ６はころ軸を中心に同一方向に回転するため、互いに隣り合う円筒ころ６同士が接触した場合、その接触部分のころ速度の向きは互いに逆方向になり、それにより発生する力は円筒ころ６の円滑な転動を妨げることになる。 For this reason, a hole 7 penetrating in the axial direction is further formed in the sleeve portion 4 of the slider body 2A, and the circulation tube 8 whose inside is a passage (rolling member passage) 8a of the cylindrical roller 6 is fitted into the hole 7. At the same time, a pair of end caps 9 as rolling element circulation parts are fixed to both ends of the slider body 2A in the axial direction via screws or the like. An infinite circulation track of the cylindrical roller 6 is formed by forming a direction changing path 10 (see FIG. 9) curved in an arc shape that communicates with the rolling element passage 8a.
By the way, since many cylindrical rollers 6 that circulate infinitely rotate in the same direction around the roller axis, when the cylindrical rollers 6 that are adjacent to each other come into contact with each other, the roller speed directions of the contact portions are opposite to each other, The force generated thereby prevents the cylindrical roller 6 from rolling smoothly.

また、転動体に円筒ころ６を使用することで、ボールを使用する場合に比べて剛性及び負荷能力が高くなる反面、走行中の円筒ころ６の軸振れ、いわゆるスキューが発生して作動性を悪化させる要因になる。
このような事情から、従来においては、互いに隣り合う円筒ころ６間にセパレータ２０を介装することで、円筒ころ同士の直接接触を防止すると共に、前記スキューを抑制し、これにより、スライダ２の走行を滑らかにすると共に、走行中の騒音低減を図るようにしている。 In addition, the use of the cylindrical roller 6 as the rolling element increases the rigidity and load capacity as compared with the case of using a ball, but on the other hand, the cylindrical roller 6 during running causes a so-called skew, resulting in improved operability. It becomes a factor to worsen.
Under such circumstances, conventionally, by interposing the separator 20 between the cylindrical rollers 6 adjacent to each other, direct contact between the cylindrical rollers is prevented and the skew is suppressed. In addition to smooth running, the noise during running is reduced.

セパレータ２０は、互いに隣り合う円筒ころ６間に介装されるセパレータ本体２１と、該円筒ころ６の軸方向の両端面を挟むように配置されて前記セパレータ本体２１と一体に設けられた腕部２２とを備えており、セパレータ本体２１の円筒ころ６の外周面に対向する部分には該円筒ころ６の外周形状に応じた凹曲面が形成されている。なお、図８において符号２３は案内レール１の外側面とスライダ２の内側面との間に配置されたセパレータ案内部材である。
そして、両転動体転動溝３，５間、方向転換路１０及び転動体通路８ａを円筒ころ６が循環する際には、セパレータ２０の腕部２２は、前記セパレータ案内部材２３、前記転動体通路８ａ及び前記方向転換路１０にそれぞれ設けられた案内溝２４によって円筒ころ６の循環方向に沿って案内されるようになっている。 The separator 20 includes a separator main body 21 interposed between the cylindrical rollers 6 adjacent to each other, and arm portions that are disposed so as to sandwich both axial end surfaces of the cylindrical roller 6 and are provided integrally with the separator main body 21. 22, and a concave curved surface corresponding to the outer peripheral shape of the cylindrical roller 6 is formed in a portion of the separator body 21 that faces the outer peripheral surface of the cylindrical roller 6. In FIG. 8, reference numeral 23 denotes a separator guide member disposed between the outer surface of the guide rail 1 and the inner surface of the slider 2.
When the cylindrical roller 6 circulates between the rolling element rolling grooves 3 and 5, the direction changing path 10 and the rolling element passage 8a, the arm portion 22 of the separator 20 is connected to the separator guide member 23 and the rolling element. It is guided along the circulation direction of the cylindrical roller 6 by guide grooves 24 provided in the passage 8a and the direction changing path 10, respectively.

上記従来の直動案内軸受装置においては、案内溝２４の溝幅は、円筒ころ６が直線運動する領域及び方向転換路１０の領域共に同一幅とされているため、直線運動領域ではセパレータ２０のセパレータ本体２１の凹曲面に円筒ころ６が密着して腕部２２が案内溝２４に沿って円滑に案内される。
しかしながら、図９に示すように、セパレータ２０がＲ円弧状の方向転換路領域に進入して傾いた場合には、該セパレータ２０の腕部２２が案内溝２４の内周壁と干渉（図１０参照）して、セパレータ本体２１の凹曲面に円筒ころ６が密着した状態で循環することができなくなり、この結果、円筒ころ６のころ間隔が変動して振動が生じやすくなり、また、セパレータ２０の寿命も短くなるといった問題が生じる虞れがある。
本発明はこのような不都合を解消するためになされたものであり、方向転換路領域でセパレータの腕部が案内溝の内周壁に干渉するのを防止することで、ころがセパレータ本体に密着した状態で転動することができるようにして方向転換路領域でのころ間隔の変動を防止し、これにより、振動を抑制して安定した作動を確保することができると共に、セパレータの寿命の長寿命化を図ることができる直動案内軸受装置を提供することを目的とする。 In the above-described conventional linear guide bearing device, the groove width of the guide groove 24 is the same in both the area where the cylindrical roller 6 moves linearly and the area of the direction change path 10. The cylindrical roller 6 is brought into close contact with the concave curved surface of the separator body 21 so that the arm portion 22 is smoothly guided along the guide groove 24.
However, as shown in FIG. 9, when the separator 20 enters the R arcuate direction change path region and tilts, the arm portion 22 of the separator 20 interferes with the inner peripheral wall of the guide groove 24 (see FIG. 10). ), The cylindrical roller 6 cannot circulate while being in close contact with the concave curved surface of the separator main body 21. As a result, the roller interval of the cylindrical roller 6 fluctuates and vibration easily occurs. There is a possibility that problems such as shortening of the service life may occur.
The present invention has been made to eliminate such inconvenience, and in the direction change path region, the roller arm is in close contact with the separator body by preventing the arm portion of the separator from interfering with the inner peripheral wall of the guide groove. It is possible to roll in a state to prevent fluctuations in the roller spacing in the direction change path region, thereby suppressing vibration and ensuring stable operation, and long life of the separator It is an object of the present invention to provide a linear motion guide bearing device that can be realized.

上記目的を達成するために、請求項１に係る発明は、両側部に軸方向に延びる転動体転動溝を有して軸方向に延長された案内レールと、該案内レールの前記転動体転動溝に対向する転動体転動溝を有し、これらの両転動体転動溝間に挿入された転動体としての多数のころの転動を介して軸方向に沿って相対移動可能に前記案内レールに跨架されたスライダと、互いに隣り合う前記ころ間に介装されたセパレータ本体及び該ころの軸方向の少なくとも一方の端面に面するように配置されて前記セパレータ本体と一体に設けられた腕部を有するセパレータとを備え、
前記スライダは、軸方向に貫通する転動体通路を有するスライダ本体と、前記両転動体転動溝間と前記転動体通路とを連通する湾曲状の方向転換路を有して前記スライダ本体の軸方向の両端面に固定された一対のエンドキャップとを具備し、
更に、前記両転動体転動溝間、前記方向転換路及び前記転動体通路を前記ころが循環する際に前記セパレータの前記腕部を前記ころの循環方向に沿って案内する案内溝が設けられた直動案内軸受装置であって、
前記方向転換路の領域における前記案内溝のＲ円弧状の内周壁に該方向転換路の内側方向に逃げる逃げ部を設け、前記逃げ部が、該逃げ部を設ける前の前記方向転換路領域の前記案内溝の内周壁のＲ円弧より曲率半径の大きい単一Ｒ円弧形状とされていることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is directed to a guide rail having axially extending rolling element rolling grooves extending on both sides, and the rolling element rolling of the guide rail. A rolling element rolling groove opposed to the rolling groove, and capable of relative movement along the axial direction through the rolling of a large number of rollers as rolling elements inserted between these rolling element rolling grooves. A slider straddled over the guide rail, a separator body interposed between the rollers adjacent to each other, and at least one end face in the axial direction of the rollers are disposed so as to be integrated with the separator body. A separator having an arm portion,
The slider has a slider body having a rolling element passage penetrating in the axial direction, and a curved direction changing path that communicates between the rolling element rolling grooves and the rolling element passage. A pair of end caps fixed to both end faces of the direction,
Furthermore, a guide groove for guiding the arm portion of the separator along the circulation direction of the roller when the roller circulates between the rolling groove rolling grooves, the direction changing path and the rolling element passage is provided. A linear motion guide bearing device,
An escape portion for escaping inward of the direction change path is provided on the R arcuate inner peripheral wall of the guide groove in the direction change path region, and the escape portion of the direction change path region before the escape portion is provided. The guide groove has a single R arc shape having a larger radius of curvature than the R arc of the inner peripheral wall of the guide groove .

請求項２に係る発明は、請求項１において、前記案内溝の内周壁のＲ円弧の曲率半径を通って該Ｒ円弧を略二等分する線の延長線上に前記逃げ部の曲率中心を位置させて該逃げ部を前記延長線の両側４５°ずつで９０°のＲ円弧形状としたことを特徴とする。
請求項３に係る発明は、請求項１又は２において、前記逃げ部を、該逃げ部の周方向の両側に位置する前記案内溝の内周壁と円弧及び／又は直線で接続したことを特徴とする。 According to a second aspect of the present invention, in the first aspect , the center of curvature of the relief portion is positioned on an extension line of a line that substantially bisects the R arc through the radius of curvature of the R arc of the inner peripheral wall of the guide groove. Thus, the escape portion is formed into a 90 ° R arc shape at 45 ° on both sides of the extension line.
The invention according to claim 3 is characterized in that, in claim 1 or 2 , the escape portion is connected to the inner peripheral wall of the guide groove located on both sides in the circumferential direction of the escape portion by an arc and / or a straight line. To do.

本発明によれば、方向転換路の領域における前記案内溝のＲ円弧状の内周壁に該方向転換路の内側方向に逃げる逃げ部を設けているので、方向転換路領域でセパレータの腕部が案内溝の内周壁に干渉しなくなってころがセパレータ本体に密着した状態で転動することが可能となる。
この結果、方向転換路領域でのころ間隔の変動を防止することができ、これにより、振動を抑制して安定した作動を確保することができると共に、セパレータの寿命の長寿命化を図ることができる。 According to the present invention, the R arc-shaped inner peripheral wall of the guide groove in the area of the direction change path is provided with the relief portion that escapes inward of the direction change path. It becomes possible to roll while the rollers are in close contact with the separator body without interfering with the inner peripheral wall of the guide groove.
As a result, it is possible to prevent fluctuations in the roller spacing in the direction change path region, thereby suppressing vibrations and ensuring stable operation and extending the life of the separator. it can.

以下、本発明の実施の形態の一例を図を参照して説明する。
図１は本発明の実施の形態の一例である直動案内軸受装置のころ軌道を説明するための説明図、図２は逃げ部を説明するための図、図３は逃げ部の詳細を説明するための図、図４は逃げ部の変形例を説明するための図、図５はセパレータを円筒ころの循環方向から見た図、図６は図５の上面図、図７は図６の側面図である。なお、この実施の形態では、既に図８で説明した従来の直動案内軸受装置との相違点についてのみ説明し、図８と重複する部材等については符号を流用する。 Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram for explaining a roller raceway of a linear motion guide bearing device which is an example of an embodiment of the present invention, FIG. 2 is a diagram for explaining a relief portion, and FIG. 3 is a diagram explaining details of the relief portion. 4 is a view for explaining a modified example of the relief portion, FIG. 5 is a view of the separator as viewed from the circulation direction of the cylindrical roller, FIG. 6 is a top view of FIG. 5, and FIG. It is a side view. In this embodiment, only differences from the conventional linear motion guide bearing device already described with reference to FIG. 8 will be described, and reference numerals will be used for members and the like overlapping those in FIG.

まず、図５〜図７を参照して、セパレータ３０を説明すると、このセパレータ３０は、互いに隣り合う円筒ころ６間に介装されたセパレータ本体３１と、円筒ころ６の軸方向の両端面を挟むように配置されてセパレータ本体３１と一体に連結された腕部３２とを備えており、セパレータ本体３１の円筒ころ６の外周面に対向する部分には該円筒ころ６の外周形状に応じた凹曲面部３１ａが形成されている。   First, the separator 30 will be described with reference to FIGS. 5 to 7. The separator 30 includes a separator body 31 interposed between adjacent cylindrical rollers 6, and both axial end surfaces of the cylindrical rollers 6. The arm portion 32 is disposed so as to be sandwiched and integrally connected to the separator main body 31. A portion of the separator main body 31 that faces the outer peripheral surface of the cylindrical roller 6 corresponds to the outer peripheral shape of the cylindrical roller 6. A concave curved surface portion 31a is formed.

また、前記腕部３２の円筒ころ６の循環方向を向く両端部には、循環中の摩擦やエンドキャップ９とスライダ本体２Ａとの接続部間の段差への引っ掛かりを抑制するため、例えば単一円弧状のＲ面取り３３が施されている。更に、セパレータ本体３１の凹曲面部３１ａ先端にも、同様の理由でＲ面取り３４が施されている（図５参照）。なお、セパレータ３０の素材としては、セパレータ本体３１と腕部３２との連結部があることから、強度上、及び潤滑剤や防錆剤の膨潤抑制を目的にＰＡ６６等のエンジニアリングプラスチックやエラストマー等が好ましい。また、樹脂部材同士のすべり性能を向上する目的から固体油脂を含有するプラスチック素材を用いてもよい。   Further, at both ends of the arm portion 32 facing the circulation direction of the cylindrical roller 6, in order to suppress the friction during circulation and the catching on the step between the connection portions of the end cap 9 and the slider body 2A, for example, a single unit is used. An arcuate R chamfer 33 is provided. Further, an R chamfer 34 is also applied to the tip of the concave curved surface portion 31a of the separator body 31 for the same reason (see FIG. 5). Since the separator 30 has a connecting portion between the separator body 31 and the arm 32, engineering plastics such as PA66, elastomers, etc. are used for the purpose of strength and suppression of swelling of the lubricant and rust preventive agent. preferable. Moreover, you may use the plastic raw material containing solid fats and oils for the purpose of improving the sliding performance between resin members.

そして、両転動体転動溝３，５間、方向転換路１０及び転動体通路８ａを円筒ころ６が循環する際には、セパレータ３０の腕部３２は、前記セパレータ案内部材２３、前記方向転換路１０及び前記転動体通路８ａにそれぞれ設けられた案内溝３４によって円筒ころ６の循環方向に沿って案内されるようになっている。
ここで、この実施の形態では、図１及び図２を参照して、方向転換路１０の領域における前記案内溝３４のＲ円弧状の内周壁に該方向転換路１０の内側方向に逃げる逃げ部３５を設けている。 When the cylindrical roller 6 circulates between the rolling element rolling grooves 3 and 5, the direction changing path 10, and the rolling element path 8 a, the arm portion 32 of the separator 30 is connected to the separator guide member 23 and the direction changing direction. Guide grooves 34 provided in the passage 10 and the rolling element passage 8a are guided along the circulation direction of the cylindrical rollers 6.
Here, in this embodiment, referring to FIG. 1 and FIG. 2, the escape portion that escapes inwardly of the direction change path 10 to the R arcuate inner peripheral wall of the guide groove 34 in the area of the direction change path 10. 35 is provided.

この逃げ部３５は、図３に示すように、該逃げ部３５を設ける前の方向転換路１０の領域における案内溝３４の内周壁のＲ円弧（この実施の形態では９０°円弧）より曲率半径の大きい単一Ｒ円弧形状とされて案内溝３４の内周壁より内側に配置されており、且つ案内溝３４の内周壁のＲ円弧の曲率中心Ｏ1 を通って該Ｒ円弧を４５°で二等分する線の延長線上に曲率中心Ｏ2 を位置させて、該延長線の両側４５°ずつで９０°の単一Ｒ円弧形状とされている。また、前記逃げ部３５は、この例では、該逃げ部３５の周方向の両側に位置する案内溝３４の内周壁と接線で接続されている。なお、図において符号Ｒは逃げ部３５の曲率半径、ｒは逃げ部３５を設ける前の案内溝３４の内周壁の曲率半径である。 As shown in FIG. 3, the escape portion 35 has a radius of curvature from an R arc (90 ° arc in this embodiment) of the inner peripheral wall of the guide groove 34 in the area of the direction change path 10 before the escape portion 35 is provided. A single R arc shape having a large diameter is arranged on the inner side of the inner peripheral wall of the guide groove 34, and passes through the center of curvature O 1 of the R arc of the inner peripheral wall of the guide groove 34, and the R arc is formed at 45 °. The center of curvature O 2 is positioned on the extended line of the equally dividing line, and a single R arc shape of 90 ° is formed at 45 ° on both sides of the extended line. Further, in this example, the escape portion 35 is connected to the inner peripheral wall of the guide groove 34 located on both sides in the circumferential direction of the escape portion 35 by a tangent line. In the figure, symbol R is a radius of curvature of the escape portion 35, and r is a radius of curvature of the inner peripheral wall of the guide groove 34 before the relief portion 35 is provided.

このようにこの実施の形態では、方向転換路１０の領域における案内溝３４のＲ円弧状の内周壁に該方向転換路１０の内側方向に逃げる逃げ部３５を設けているので、方向転換路領域でセパレータ３０の腕部３２が案内溝３４の内周壁に干渉しないようにすることができ、方向転換路１０で円筒ころ３がセパレータ本体３１の凹曲面部３１ａに終始密着した状態で循環することが可能となる。
この結果、方向転換路領域での円筒ころ６のころ間隔の変動を防止することができ、これにより、振動を抑制して安定した作動を確保することができると共に、セパレータ３０の寿命の長寿命化を図ることができる。
なお、本発明の直動案内軸受装置は上記実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。 As described above, in this embodiment, since the escape portion 35 that escapes inward of the direction change path 10 is provided on the R arcuate inner peripheral wall of the guide groove 34 in the area of the direction change path 10, the direction change path region is provided. Thus, the arm portion 32 of the separator 30 can be prevented from interfering with the inner peripheral wall of the guide groove 34, and the cylindrical roller 3 circulates in a state of being in close contact with the concave curved surface portion 31 a of the separator body 31 through the direction changing path 10. Is possible.
As a result, fluctuations in the roller spacing of the cylindrical rollers 6 in the direction change path region can be prevented, thereby suppressing vibrations and ensuring stable operation, and a long life of the separator 30. Can be achieved.
The linear guide bearing device of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist of the present invention.

例えば、上記実施の形態では、前記逃げ部３５を、該逃げ部３５を設ける前の方向転換路１０の領域における案内溝３４の内周壁のＲ円弧より曲率半径の大きい単一Ｒ円弧形状とした場合を例に採ったが、これに限定されず、例えば図４に示すように、前記逃げ部３５を、該逃げ部３５を設ける前の方向転換路１０の領域における案内溝３４の内周壁のＲ円弧より曲率半径の小さいＲ円弧形状とし、且つその曲率中心Ｏ2 を案内溝３４の内周壁のＲ円弧の曲率中心Ｏ1 と一致させて案内溝３４の内周壁より内側に配置し、逃げ部３５の周方向の両側に位置する案内溝３４の内周壁と逃げ部３５とをＲ円弧と接線で接続するようにしてもよい。 For example, in the above-described embodiment, the escape portion 35 has a single R arc shape having a larger radius of curvature than the R arc of the inner peripheral wall of the guide groove 34 in the region of the direction change path 10 before the escape portion 35 is provided. Although the case is taken as an example, the present invention is not limited to this. For example, as shown in FIG. 4, the escape portion 35 is formed on the inner peripheral wall of the guide groove 34 in the area of the direction change path 10 before the escape portion 35 is provided. An R-arc shape having a smaller radius of curvature than the R-arc, and the center of curvature O 2 is aligned with the center of curvature O 1 of the R-arc of the inner peripheral wall of the guide groove 34, and is disposed on the inner side of the inner peripheral wall of the guide groove 34. You may make it connect the inner peripheral wall of the guide groove 34 located in the both sides of the circumferential direction of the part 35, and the escape part 35 by R arc and a tangent.

本発明の実施の形態の一例である直動案内軸受装置のころ軌道を説明するための説明図である。It is explanatory drawing for demonstrating the roller track | orbit of the linear guide bearing apparatus which is an example of embodiment of this invention. 逃げ部を説明するための図である。It is a figure for demonstrating an escape part. 逃げ部の詳細を説明するための図である。It is a figure for demonstrating the detail of an escape part. 逃げ部の変形例を説明するための図である。It is a figure for demonstrating the modification of an escape part. セパレータを円筒ころの循環方向から見た図である。It is the figure which looked at the separator from the circulation direction of the cylindrical roller. 図５の上面図である。FIG. 6 is a top view of FIG. 5. 図６の側面図である。FIG. 7 is a side view of FIG. 6. 直動案内軸受装置の一例を説明するための一部を切り欠いた図である。It is the figure which notched a part for explaining an example of a linear guide bearing device. 従来の直動案内軸受装置の方向転換路領域を示す図である。It is a figure which shows the direction change path area | region of the conventional linear guide bearing apparatus. 図９に示す方向転換路領域での不具合を説明するための図である。It is a figure for demonstrating the malfunction in the direction change path area | region shown in FIG.

符号の説明Explanation of symbols

１ 案内レール
２ スライダ
２Ａ スライダ本体
３ 転動体転動溝（案内レール側）
５ 転動体転動溝（スライダ側）
６ 円筒ころ
８ａ 転動体通路
９ エンドキャップ
１０ 方向転換路
３０ セパレータ
３１ セパレータ本体
３２ 腕部
３４ 案内溝
３５ 逃げ部 1 Guide rail 2 Slider 2A Slider body 3 Rolling element rolling groove (guide rail side)
5 Rolling element rolling groove (slider side)
6 Cylindrical roller 8a Rolling element passage 9 End cap 10 Direction changing passage 30 Separator 31 Separator body 32 Arm 34 Guide groove 35 Escape

Claims (3)

両側部に軸方向に延びる転動体転動溝を有して軸方向に延長された案内レールと、該案内レールの前記転動体転動溝に対向する転動体転動溝を有し、これらの両転動体転動溝間に挿入された転動体としての多数のころの転動を介して軸方向に沿って相対移動可能に前記案内レールに跨架されたスライダと、互いに隣り合う前記ころ間に介装されたセパレータ本体及び該ころの軸方向の少なくとも一方の端面に面するように配置されて前記セパレータ本体と一体に設けられた腕部を有するセパレータとを備え、
前記スライダは、軸方向に貫通する転動体通路を有するスライダ本体と、前記両転動体転動溝間と前記転動体通路とを連通する湾曲状の方向転換路を有して前記スライダ本体の軸方向の両端面に固定された一対のエンドキャップとを具備し、
更に、前記両転動体転動溝間、前記方向転換路及び前記転動体通路を前記ころが循環する際に前記セパレータの前記腕部を前記ころの循環方向に沿って案内する案内溝が設けられた直動案内軸受装置であって、
前記方向転換路の領域における前記案内溝のＲ円弧状の内周壁に該方向転換路の内側方向に逃げる逃げ部を設け、前記逃げ部が、該逃げ部を設ける前の前記方向転換路領域の前記案内溝の内周壁のＲ円弧より曲率半径の大きい単一Ｒ円弧形状とされていることを特徴とする直動案内軸受装置。 A guide rail extending in the axial direction with rolling element rolling grooves extending in the axial direction on both sides, and a rolling element rolling groove facing the rolling element rolling groove of the guide rail, and Between the rollers adjacent to each other, the slider straddled on the guide rail so as to be relatively movable along the axial direction through rolling of a large number of rollers as rolling elements inserted between the rolling grooves of both rolling elements. A separator main body interposed between and a separator having an arm portion disposed integrally with the separator main body so as to face at least one end face in the axial direction of the roller,
The slider includes a slider body having a rolling element passage penetrating in the axial direction, and a curved direction changing path that communicates between the rolling element rolling grooves and the rolling element passage. A pair of end caps fixed to both end faces of the direction,
Furthermore, a guide groove for guiding the arm portion of the separator along the circulating direction of the roller when the roller circulates between the rolling element rolling grooves, the direction changing path and the rolling element passage is provided. A linear motion guide bearing device,
An escape portion that escapes inward of the direction change path is provided on an R-circular inner peripheral wall of the guide groove in the direction change path region, and the escape portion of the direction change path region before the escape portion is provided. A linear guide bearing device having a single R-arc shape having a larger radius of curvature than the R-arc of the inner peripheral wall of the guide groove . 前記案内溝の内周壁のＲ円弧の曲率半径を通って該Ｒ円弧を略二等分する線の延長線上に前記逃げ部の曲率中心を位置させて該逃げ部を前記延長線の両側４５°ずつで９０°のＲ円弧形状としたことを特徴とする請求項１記載の直動案内軸受装置。 The center of curvature of the escape portion is positioned on an extension line of a line that bisects the R arc through the radius of curvature of the R arc of the inner peripheral wall of the guide groove, and the escape portion is positioned at 45 ° on both sides of the extension line. The linear guide bearing device according to claim 1, wherein each of the linear guide bearing devices has an R arc shape of 90 °. 前記逃げ部を、該逃げ部の周方向の両側に位置する前記案内溝の内周壁と円弧及び／又は直線で接続したことを特徴とする請求項１または２記載の直動案内軸受装置。 The linear motion guide bearing device according to claim 1 or 2 , wherein the relief portion is connected to an inner circumferential wall of the guide groove located on both sides in the circumferential direction of the relief portion by an arc and / or a straight line.
JP2003370977A 2003-03-13 2003-10-30 Linear motion guide bearing device Expired - Fee Related JP4093172B2 (en)

Priority Applications (3)

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JP2003370977A JP4093172B2 (en) 2003-10-30 2003-10-30 Linear motion guide bearing device
EP04005871A EP1457693A2 (en) 2003-03-13 2004-03-11 Linear guide apparatus
US10/797,109 US7465093B2 (en) 2003-03-13 2004-03-11 Linear guide apparatus

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