JP5071524B2 - Linear motion rolling guide - Google Patents

Linear motion rolling guide Download PDF

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JP5071524B2
JP5071524B2 JP2010128804A JP2010128804A JP5071524B2 JP 5071524 B2 JP5071524 B2 JP 5071524B2 JP 2010128804 A JP2010128804 A JP 2010128804A JP 2010128804 A JP2010128804 A JP 2010128804A JP 5071524 B2 JP5071524 B2 JP 5071524B2
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oil supply
supply passage
main body
linear motion
end cap
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JP2010185582A (en
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▲うぇい▼ 徐
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NSK Ltd
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NSK Ltd
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本発明は、直線運動する物体を案内する機械部品として、工作機械や射出成形機等で用いられる直動転がり案内装置に関する。   The present invention relates to a linear motion rolling guide device used in a machine tool, an injection molding machine or the like as a machine part for guiding a linearly moving object.

工作機械や射出成形機等で用いられる直動転がり案内装置として、図6〜図8に示されるものが知られている。図6及び図7において、符号11は直動転がり案内装置の案内レールであって、この案内レール11の左右側面部には複数本の転動体転動溝12が左右対称に形成されている。これらの転動体転動溝12はスライダ13に設けられた転動体転動溝16と各々対向しており、転動体転動溝12と転動体転動溝16との間には、転動体17を案内レール11の長手方向に転走させるための転動体転走路が形成されている。   As linear motion rolling guide devices used in machine tools, injection molding machines and the like, those shown in FIGS. 6 to 8 are known. 6 and 7, reference numeral 11 denotes a guide rail of the linear motion rolling guide device, and a plurality of rolling element rolling grooves 12 are formed symmetrically on the left and right side surfaces of the guide rail 11. These rolling element rolling grooves 12 are respectively opposed to the rolling element rolling grooves 16 provided in the slider 13, and between the rolling element rolling grooves 12 and the rolling element rolling grooves 16, there are rolling elements 17. Is formed in a rolling element rolling path for rolling in the longitudinal direction of the guide rail 11.

スライダ13は案内レール11の右側面部及び左側面部に各々対向する二つの内壁面141,142(図7参照)を有するスライダ本体14と、このスライダ本体14のフロント側端面部及びリヤ側端面部にそれぞれ装着された二つのエンドキャップ15とからなり、転動体転動溝16はスライダ本体14の内壁面141,142に形成されている。
スライダ本体14の内部には、複数の転動体戻し通路18が互いに平行に形成されている。これらの転動体戻し通路18はエンドキャップ15に形成されたU字状の方向転換路19に連通しており、従って、転動体転動溝12と転動体転動溝16との間に形成された転動体転走路を転走した転動体17は方向転換路19に入り、ここで方向転換した後、転動体戻し通路18に導入されて循環運動するようになっている。
The slider 13 has a slider main body 14 having two inner wall surfaces 141 and 142 (see FIG. 7) opposed to the right and left side portions of the guide rail 11, and a front side end surface portion and a rear side end surface portion of the slider main body 14, respectively. The rolling element rolling groove 16 is formed on the inner wall surfaces 141 and 142 of the slider body 14.
A plurality of rolling element return passages 18 are formed in the slider body 14 in parallel with each other. These rolling element return passages 18 communicate with a U-shaped direction change path 19 formed in the end cap 15, and thus are formed between the rolling element rolling grooves 12 and the rolling element rolling grooves 16. The rolling element 17 that has rolled on the rolling element rolling path enters the direction changing path 19, where it changes direction, and is then introduced into the rolling element return passage 18 so as to circulate.

エンドキャップ15内には、転動体17に潤滑油を供給するための給油路20(図8参照)が形成されている。この給油路20はエンドキャップ15の背面部またはスライダ本体14の端面部に設けられた給油路形成溝により形成されており、エンドキャップ15には、給油路20に潤滑油を供給するための給油口21が設けられている。   An oil supply passage 20 (see FIG. 8) for supplying lubricating oil to the rolling elements 17 is formed in the end cap 15. The oil supply passage 20 is formed by an oil supply passage forming groove provided on the back surface portion of the end cap 15 or the end surface portion of the slider main body 14, and the end cap 15 is supplied with oil for supplying lubricating oil to the oil supply passage 20. A mouth 21 is provided.

このような直動転がり装置では、スライダ13の姿勢を水平にして用いる場合はスライダ13内に組み込まれた全ての転動体17に十分な量の潤滑油を供給できるが、スライダ13の姿勢が図9に示す垂直姿勢や図10に示す斜め姿勢の場合には、給油路20に供給された潤滑油が下方に流れ易くなる。このため、スライダ13の姿勢が水平以外の姿勢である場合には、全ての転動体17に十分な量の潤滑油を供給できなくなり、転動体17が焼付きを起こすおそれがあった。
本発明は、このような問題点に着目してなされたものであり、スライダの姿勢が水平以外の姿勢であっても全ての転動体に潤滑油を供給することのできる直動転がり案内装置を提供することを目的とするものである。
In such a linear motion rolling device, when the slider 13 is used in a horizontal position, a sufficient amount of lubricating oil can be supplied to all the rolling elements 17 incorporated in the slider 13. In the vertical posture shown in FIG. 9 and the oblique posture shown in FIG. 10, the lubricating oil supplied to the oil supply passage 20 easily flows downward. For this reason, when the posture of the slider 13 is a posture other than horizontal, a sufficient amount of lubricating oil cannot be supplied to all of the rolling elements 17, and the rolling elements 17 may be seized.
The present invention has been made paying attention to such problems, and provides a linear motion rolling guide device capable of supplying lubricating oil to all rolling elements even when the slider posture is other than horizontal. It is intended to provide.

上記の目的を達成するために、請求項1の発明は、案内レールの長手方向に相対直線運動するスライダ本体と、該スライダ本体の端面部に接合される背面側に凹状部をそれぞれ有する二つのエンドキャップと、該エンドキャップの前記凹状部に嵌め込まれるプレート状の給油路形成部材とを備えて、前記エンドキャップと前記給油路形成部材との間に、当該給油路形成部材のエンドキャップ側の面に形成された給油路形成溝によって給油路を形成してなり、前記給油路形成溝の両側縁部には、前記給油路形成溝に沿って、前記エンドキャップに向って突出する凸部を設け、さらに前記給油路の断面積をS(mm 2 )、前記給油路の断面周長をL(mm)、前記スライダ本体を垂直姿勢としたときの前記スライダ本体の中心線より上側に位置する給油路と前記スライダ本体の中心線より下側に位置する給油路との間隔をB(mm)とし、給油路に供給する潤滑油をISO粘度グレードにおいてVG10〜VG150としたとき、前記給油路がL/S≧B/7の関係を満たすことを特徴とする直動転がり案内装置に係る。 In order to achieve the above object, the invention of claim 1 is characterized in that a slider body that moves relatively linearly in the longitudinal direction of the guide rail and two concave portions on the back side that are joined to the end face of the slider body. An end cap and a plate-like oil passage forming member fitted in the concave portion of the end cap, and the end cap side of the oil passage forming member is disposed between the end cap and the oil passage forming member. surface to the formed oil passage forming groove Ri name to form the oil supply passage, wherein the side edge portions of the oil supply passage forming grooves, along the oil supply passage forming groove, protrusion protruding toward the end cap The cross-sectional area of the oil supply passage is S (mm 2 ), the cross-sectional circumference of the oil supply passage is L (mm), and the slider main body is positioned above the center line of the slider main body in a vertical posture. You When the interval between the oil supply passage and the oil supply passage located below the center line of the slider body is B (mm) and the lubricating oil supplied to the oil supply passage is VG10 to VG150 in the ISO viscosity grade, the oil supply passage is The present invention relates to a linear motion rolling guide device characterized by satisfying a relationship of L / S ≧ B / 7 .

請求項2の発明は、前記給油路の断面形状が三角形状、矩形状、半円形状、半楕円形状のうち何れか1の形状である請求項1記載の直動転がり案内装置に係る。また請求項3の発明は、請求項1又は2に記載の直動転がり案内装置において、前記給油路が複数本の前記給油路形成溝により形成されてなる直動転がり案内装置に係る。 The invention according to claim 2 relates to the linear motion rolling guide device according to claim 1, wherein the cross-sectional shape of the oil supply passage is any one of a triangular shape, a rectangular shape, a semicircular shape, and a semielliptical shape. The invention of claim 3, Te guide apparatus odor linear motion rolling according to claim 1 or 2, according to the prior SL oil supply passage is a linear motion rolling guide device in which are formed by the oil supply passage forming grooves of plural.

本発明の実施形態に係る直動転がり案内装置の概略構成を示す斜視図である。It is a perspective view which shows schematic structure of the linear motion rolling guide apparatus which concerns on embodiment of this invention. 図1に示すエンドキャップの背面図である。It is a rear view of the end cap shown in FIG. 図2に示すエンドキャップの背面部に形成された凹状部に組み込まれる給油路形成部材の背面図である。It is a rear view of the oil supply path formation member integrated in the concave part formed in the back part of the end cap shown in FIG. 図3に示す給油路形成溝の断面図である。It is sectional drawing of the oil supply path formation groove | channel shown in FIG. プラスチックパイプの下端部を油槽内に挿入したときのプラスチックパイプ内の油面高さを測定した結果を示す図である。It is a figure which shows the result of having measured the oil level height in a plastic pipe when the lower end part of a plastic pipe is inserted in an oil tank. 従来の直動転がり案内装置の概略構成を示す平面図である。It is a top view which shows schematic structure of the conventional linear motion rolling guide apparatus. 図6のXVIII−XVIII断面図である。It is XVIII-XVIII sectional drawing of FIG. 図6のXIX−XIX断面図である。It is XIX-XIX sectional drawing of FIG. スライダの姿勢を垂直姿勢として用いる場合の直動転がり案内装置を示す図である。It is a figure which shows the linear motion rolling guide apparatus when using the attitude | position of a slider as a vertical attitude | position. スライダの姿勢を斜め姿勢として用いる場合の直動転がり案内装置を示す図である。It is a figure which shows the linear motion rolling guide apparatus when using the attitude | position of a slider as a diagonal attitude | position.

図1〜図4を参照して本発明の実施形態について説明する。
図1は本発明の実施形態に係る直動転がり案内装置の概略構成を示す斜視図であり、同図に示すように、案内レール11の長手方向に相対直線運動するスライダ本体14のフロント側端面部とリヤ側端面部にはエンドキャップ15がそれぞれ装着されている。これらのエンドキャップ15は図2に示すような凹状部25をスライダ本体14と接合される背面部に有しており、各凹状部25には、図3に示すような給油路形成部材26が着脱可能に嵌め込まれている。
An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing a schematic configuration of a linear motion rolling guide device according to an embodiment of the present invention. As shown in FIG. 1, the front side end face of a slider body 14 that moves relatively linearly in the longitudinal direction of the guide rail 11. End caps 15 are respectively attached to the front and rear end face portions. These end caps 15 have concave portions 25 as shown in FIG. 2 on the back surface portion to be joined to the slider body 14, and each concave portion 25 has an oil supply path forming member 26 as shown in FIG. It is detachably fitted.

給油路形成部材26はプレート状に形成されており、この給油路形成部材26には給油路形成溝27が設けられている。この給油路形成溝27はエンドキャップ15との間に給油路を形成しており、給油路形成溝27の両側縁部には、凹状部25の底面部(エンドキャップ15の背面部)に向かって突出する凸部28(図4参照)が給油路形成溝27の長手方向に沿って設けられている。   The oil supply passage forming member 26 is formed in a plate shape, and the oil supply passage forming member 26 is provided with an oil supply passage forming groove 27. The oil supply passage forming groove 27 forms an oil supply passage with the end cap 15, and the oil supply passage formation groove 27 faces the bottom surface portion of the concave portion 25 (the back portion of the end cap 15) at both side edges. A protruding portion 28 (see FIG. 4) that protrudes along the longitudinal direction of the oil supply passage forming groove 27 is provided.

給油路形成溝27はその断面が矩形状をなしており、この給油路形成溝27により形成される給油路の断面積をS、同じく給油路の断面周長をL、スライダ13を垂直姿勢としたときのスライダ本体14の中心線より上側に位置する給油路とスライダ本体14の中心線より下側に位置する給油路との間隔をBとすると、給油路形成溝27は、次式を満たすように給油路形成部材26に形成されている。
L/S≧B/7 ‥‥(1)
The oil supply passage forming groove 27 has a rectangular cross section. The cross section of the oil supply passage formed by the oil supply passage forming groove 27 is S, the cross-sectional circumferential length of the oil supply passage is L, and the slider 13 is in the vertical posture. When the distance between the oil supply passage located above the center line of the slider main body 14 and the oil supply passage located below the center line of the slider main body 14 is B, the oil supply passage forming groove 27 satisfies the following equation. In this way, the oil supply passage forming member 26 is formed.
L / S ≧ B / 7 (1)

本発明者は、汎用潤滑油(VG10〜VG150)が貯溜された油槽内にプラスチックパイプの下端部を垂直に挿入したときのプラスチックパイプ内の油面高さを測定した。そして、これを内径が異なる複数本のプラスチックパイプ(実験では6本)に対して実施したところ、図5に示すような実験結果が得られた。   The present inventor measured the oil level in the plastic pipe when the lower end of the plastic pipe was vertically inserted into the oil tank in which the general-purpose lubricating oil (VG10 to VG150) was stored. And when this was implemented with respect to several plastic pipes (6 in experiment) with different internal diameters, the experimental result as shown in FIG. 5 was obtained.

図5に示す実験結果から明らかなように、プラスチックパイプ内の油面高さをH、プラスチックパイプの内径断面積をS、プラスチックパイプの内周長をLとすると、プラスチックパイプ内の油面高さHは、プラスチックパイプの内周長Lと内径面積Sとの比率に対して下式の関係を持っていることがわかる。
H=7L/S ‥‥(2)
上述のように、式(1)を満たすように給油路形成溝27を給油路形成部材26に設けることで、給油路の潤滑油保持能力が向上し、スライダ13を水平以外の姿勢で用いても全ての転動体に潤滑油を供給することが可能となるので、転動体の焼付きを防止することができる。
As is clear from the experimental results shown in FIG. 5, the oil surface height in the plastic pipe H, the inner diameter cross-sectional area S P output plastic pipe and the inner peripheral length of the plastic pipe to L P, the oil in the plastic pipe Mendaka H is, it is found to have a relationship of the following formula with respect to the ratio of the inner peripheral length L P and the inner diameter area S P output plastic pipes.
H = 7L P / S P (2)
As described above, by providing the oil supply passage forming groove 27 in the oil supply passage forming member 26 so as to satisfy the expression (1), the lubricating oil retention capacity of the oil supply passage is improved, and the slider 13 is used in a posture other than horizontal. Since it becomes possible to supply lubricating oil to all the rolling elements, seizure of the rolling elements can be prevented.

また、凹状部25の底面部に向かって突出する凸部28を給油路形成溝27の長手方向に沿って給油路形成溝27の両側縁部に設けたことで、エンドキャップ15と給油路形成部材26との間に微小な間隙が生じても潤滑油が給油路形成溝27から漏洩することを防止できるため、潤滑油の漏洩に起因する転動体の焼付きを抑制することができる。
上述した実施形態では給油路形成溝27を給油路形成部材26に設けたが、給油路形成溝27をエンドキャップ15に設けてもよい。この場合、給油路形成溝27の両側縁部に設けられる凸部28は給油路形成部材26に向かって突出することになる。
Further, the convex portion 28 protruding toward the bottom surface portion of the concave portion 25 is provided on both side edges of the oil supply passage forming groove 27 along the longitudinal direction of the oil supply passage forming groove 27, thereby forming the end cap 15 and the oil supply passage. Even if a minute gap is generated between the member 26 and the lubricating oil, it is possible to prevent the lubricating oil from leaking from the oil supply passage forming groove 27. Therefore, seizure of the rolling elements due to the leakage of the lubricating oil can be suppressed.
In the embodiment described above, the oil supply passage forming groove 27 is provided in the oil supply passage forming member 26, but the oil supply passage forming groove 27 may be provided in the end cap 15. In this case, the convex portions 28 provided on both side edges of the oil supply passage forming groove 27 protrude toward the oil supply passage forming member 26.

また、上述した実施形態では給油路形成溝27として断面が矩形状のものを示したが、これに限定されるものではなく、断面が三角形状、半円形形状あるいは半楕円形状のものであってもよい。
さらに、上述した実施形態では給油路を一本の給油路形成溝27から形成したが、互いに独立した複数本の給油路形成溝27から給油路を形成してもよい。
In the above-described embodiment, the oil supply passage forming groove 27 has a rectangular cross section, but is not limited to this, and the cross section has a triangular shape, a semicircular shape, or a semielliptical shape. Also good.
Further, in the above-described embodiment, the oil supply passage is formed from one oil supply passage forming groove 27, but the oil supply passage may be formed from a plurality of oil supply passage forming grooves 27 independent from each other.

11 案内レール
12 転動体転動溝
13 スライダ
14 スライダ本体
15 エンドキャップ
16 転動体転動溝
17 転動体
18 転動体戻し通路
19 方向転換路
20 給油路
21 給油口
23 凸部
25 凹状部
26 給油路形成部材
27 給油路形成溝
28 凸部
DESCRIPTION OF SYMBOLS 11 Guide rail 12 Rolling body rolling groove 13 Slider 14 Slider main body 15 End cap 16 Rolling body rolling groove 17 Rolling body 18 Rolling body return path 19 Direction change path 20 Oil supply path 21 Oil supply port 23 Convex part 25 Concave part 26 Oil supply path Forming member 27 Oil supply passage forming groove 28 Projection

Claims (3)

案内レールの長手方向に相対直線運動するスライダ本体と、該スライダ本体の端面部に接合される背面側に凹状部をそれぞれ有する二つのエンドキャップと、該エンドキャップの前記凹状部に嵌め込まれるプレート状の給油路形成部材とを備えて、前記エンドキャップと前記給油路形成部材との間に、当該給油路形成部材のエンドキャップ側の面に形成された給油路形成溝によって給油路を形成してなり、前記給油路形成溝の両側縁部には、前記給油路形成溝に沿って、前記エンドキャップに向って突出する凸部を設け、さらに前記給油路の断面積をS(mm 2 )、前記給油路の断面周長をL(mm)、前記スライダ本体を垂直姿勢としたときの前記スライダ本体の中心線より上側に位置する給油路と前記スライダ本体の中心線より下側に位置する給油路との間隔をB(mm)とし、給油路に供給する潤滑油をISO粘度グレードにおいてVG10〜VG150としたとき、前記給油路がL/S≧B/7の関係を満たすことを特徴とする直動転がり案内装置。 A slider main body that moves relatively linearly in the longitudinal direction of the guide rail, two end caps each having a concave portion on the back side that is joined to the end surface portion of the slider main body, and a plate shape that is fitted into the concave portion of the end cap An oil supply path forming member, and an oil supply path is formed between the end cap and the oil supply path forming member by an oil supply path forming groove formed on the end cap side surface of the oil supply path forming member. Do Ri, wherein the side edge portions of the oil supply passage forming grooves, along the oil supply passage forming groove, a protrusion protruding toward the end cap is provided, further a cross-sectional area of the supply passage S (mm 2) The cross-sectional circumferential length of the oil supply passage is L (mm), and the oil supply passage located above the center line of the slider main body when the slider main body is in a vertical posture and the position lower than the center line of the slider main body When the interval between the oil supply passage and the lubricating oil supplied to the oil supply passage is VG10 to VG150 in the ISO viscosity grade, the oil supply passage satisfies the relationship L / S ≧ B / 7. A linear motion rolling guide device. 前記給油路の断面形状が三角形状、矩形状、半円形状、半楕円形状のうち何れか1の形状である請求項1記載の直動転がり案内装置。   The linear motion rolling guide device according to claim 1, wherein the cross-sectional shape of the oil supply passage is any one of a triangular shape, a rectangular shape, a semicircular shape, and a semielliptical shape. 請求項1又は2に記載の直動転がり案内装置において、前記給油路が複数本の前記給油路形成溝により形成されてなる直動転がり案内装置。 The linear motion rolling guide apparatus according to claim 1 or 2 , wherein the oil supply path is formed by a plurality of oil supply path forming grooves.
JP2010128804A 2010-06-04 2010-06-04 Linear motion rolling guide Expired - Fee Related JP5071524B2 (en)

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JP5071524B2 true JP5071524B2 (en) 2012-11-14

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JP2015090187A (en) 2013-11-06 2015-05-11 日本精工株式会社 Rolling bearing guide device

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JP4304087B2 (en) * 2004-01-21 2009-07-29 上銀科技股▲分▼有限公司 Linear guideway lubrication system
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