JP2003239982A - Linear motion device - Google Patents

Linear motion device

Info

Publication number
JP2003239982A
JP2003239982A JP2002042280A JP2002042280A JP2003239982A JP 2003239982 A JP2003239982 A JP 2003239982A JP 2002042280 A JP2002042280 A JP 2002042280A JP 2002042280 A JP2002042280 A JP 2002042280A JP 2003239982 A JP2003239982 A JP 2003239982A
Authority
JP
Japan
Prior art keywords
retaining
groove
rolling
retaining piece
axial direction
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.)
Pending
Application number
JP2002042280A
Other languages
Japanese (ja)
Inventor
Shigeyuki Ochiai
成行 落合
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NSK Ltd filed Critical NSK Ltd
Priority to JP2002042280A priority Critical patent/JP2003239982A/en
Publication of JP2003239982A publication Critical patent/JP2003239982A/en
Pending legal-status Critical Current

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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/37—Loose spacing bodies
    • F16C33/3706—Loose spacing bodies with concave surfaces conforming to the shape of the rolling elements, e.g. the spacing bodies are in sliding contact with the rolling elements
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • 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
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/0633—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
    • F16C29/0635—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end
    • F16C29/0638—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls
    • F16C29/0642—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls
    • F16C29/0647—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides whereby the return paths are provided as bores in a main body of the U-shaped carriage, e.g. the main body of the U-shaped carriage is a single part with end caps provided at each end with balls with four rows of balls with load directions in X-arrangement
    • 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
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • F16H25/2233—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with cages or means to hold the balls in position
    • F16H25/2238—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with cages or means to hold the balls in position using ball spacers, i.e. spacers separating the balls, e.g. by forming a chain supporting the balls

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To reduce wear of a retaining recessed face of retaining pieces provided between rolling elements of a linear motion device to prolong service life of the device, and also to prevent the retaining piece from falling down on its side. <P>SOLUTION: A ball screw device is constituted in such a way that it has a screw shaft having a ball rolling groove extending in the axial direction and extended in the axial direction and a screw groove opposing to the screw groove of the screw groove, is supported on the screw shaft so as to move relatively along the axial direction through rolling of many balls 5 inserted between these screw grooves, and is provided with a ball nut which has a circulation passage for the balls 5 and in which the retaining piece 100 retaining the balls 5 between balls 5 is provided. A linear oil retaining groove 103 is provided on the retaining recessed face 102 of the balls 5 of the retaining piece 100. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、例えば半導体製造
装置、射出成型機、産業用ロボット等に用いられるボー
ルねじ装置やリニアガイド装置等の直動装置に係り、詳
しくは、各転動体間に該転動体を保持するリテーニング
ピースが介装された直動装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motion device such as a ball screw device or a linear guide device used in, for example, semiconductor manufacturing equipment, injection molding machines, industrial robots, etc. The present invention relates to a linear motion device in which a retaining piece that holds the rolling element is interposed.

【０００２】[0002]

【従来の技術】図１７に各転動体間にリテーニングピー
スが介装された直動装置の一例であるボールねじ装置の
従来例を示す。このボールねじ装置１は、外周面に断面
半円状のねじ溝（転動体転動溝）２を有して軸方向に延
びるねじ軸（案内軸）３に、内周面に断面半円状のねじ
溝（転動体転動溝）４を有するボールナット（可動体）
６が嵌合されている。2. Description of the Related Art FIG. 17 shows a conventional example of a ball screw device which is an example of a linear motion device in which a retaining piece is interposed between rolling elements. This ball screw device 1 has a thread groove (rolling element rolling groove) 2 having a semicircular cross section on the outer peripheral surface and a screw shaft (guide shaft) 3 extending in the axial direction, and a semicircular cross section on the inner peripheral surface. Ball nut (movable body) having a thread groove (rolling element rolling groove) 4
6 is fitted.

【０００３】ボールナット６のねじ溝４とねじ軸３のね
じ溝２とは互いに対向して両者の間に螺旋状通路を形成
しており、該螺旋状通路には転動体としての多数のボー
ル５が転動可能に装填されている。また、図１７では図
示を省略するが、各ボール５間には、図１８および図１
９に示すように、駆動時のボール５同士の衝突音を無く
して低騒音化を図ることを目的として、リテーニングピ
ース５３が介装されている。The screw groove 4 of the ball nut 6 and the screw groove 2 of the screw shaft 3 face each other to form a spiral passage between them, and a large number of balls as rolling elements are formed in the spiral passage. 5 is rotatably loaded. Although not shown in FIG. 17, the space between the balls 5 is not shown in FIGS.
As shown in FIG. 9, a retaining piece 53 is interposed for the purpose of eliminating the collision noise between the balls 5 during driving and reducing noise.

【０００４】このリテーニングピース５３は中央部に貫
通穴５５を有する円筒状のものや、貫通穴を有していな
い円柱状のものがあり、いずれもボール５に対向する軸
方向の両端面にそれぞれ該ボール５を保持する球面状、
ゴシックアーチ形状又は円錐状等からなる保持凹面５４
が形成されている。なお、上記ボールねじ装置１は、ね
じ軸３の回転により、ボール５が両ねじ溝２，４で形成
される螺旋状通路を転動しつつ移動し、このボール５の
転動を介してボールナット６がねじ軸３に沿って軸方向
に移動するようになっているが、ボールナット６を継続
して移動させていくためには、ボール５を螺旋状通路内
で無限循環させる必要がある。The retaining piece 53 includes a cylindrical shape having a through hole 55 in the central portion and a cylindrical shape having no through hole, both of which are provided on both axial end surfaces facing the ball 5. A spherical shape that holds the ball 5,
Holding concave surface 54 having a Gothic arch shape or a conical shape
Are formed. In the ball screw device 1, the balls 5 move while rolling in the spiral passage formed by the screw grooves 2 and 4 by the rotation of the screw shaft 3, and the balls 5 roll through the balls. The nut 6 is configured to move in the axial direction along the screw shaft 3. However, in order to continuously move the ball nut 6, it is necessary to infinitely circulate the ball 5 in the spiral passage. .

【０００５】このため、例えばボールナット６の外周面
の一部を平坦面にしてこの平坦部に両ねじ溝２，４に連
通する２個一組の孔５１をねじ軸３を跨ぐように形成
し、この一組の孔５１にコ字状のボール循環チューブ５
０Ａの両端を嵌め込むことにより、ボールの無限循環通
路５２を形成している。なお、このボール無限循環通路
を形成するには、ボール循環チューブ式の他に、こま
式、エンドキャップ式やその他の方式も採用される。Therefore, for example, a part of the outer peripheral surface of the ball nut 6 is made a flat surface, and a pair of holes 51 communicating with the screw grooves 2 and 4 are formed in the flat portion so as to straddle the screw shaft 3. Then, the U-shaped ball circulation tube 5 is provided in the pair of holes 51.
By fitting both ends of 0A, the infinite circulation passage 52 of the ball is formed. In addition to the ball circulation tube type, a top type, an end cap type and other types are also used to form the infinite ball circulation passage.

【０００６】一方、図２０は直動装置の他の例であるリ
ニアガイド装置の従来例を示したものである。このリニ
アガイド装置は、軸方向に延びる案内レール（案内軸）
１０と、該案内レール１０上に軸方向に相対移動可能に
跨架されたスライダ（可動体）１２とを備えている。On the other hand, FIG. 20 shows a conventional example of a linear guide device which is another example of the linear motion device. This linear guide device has a guide rail (guide shaft) extending in the axial direction.
10 and a slider (movable body) 12 mounted on the guide rail 10 so as to be relatively movable in the axial direction.

【０００７】案内レール１０の両側面にはそれぞれ軸方
向に延びる転動体転動溝１３が形成されており、スライ
ダ１２のスライダ本体１２Ａには、その両袖部１４の内
側面にそれぞれ転動体転動溝１３に対向する転動体転動
溝３１が形成されている。そして、これらの向き合った
両転動体転動溝１３，３１の間には転動体としての多数
のボール５が転動自在に装填され、このボール５の転動
を介してスライダ１２が案内レール１０上を軸方向に沿
って相対移動できるようになっている。また、図２０で
は図示を省略するが、各ボール５間には、上記ボールね
じ装置と同様に、駆動時のボール５同士の衝突音を無く
して低騒音化を図ることを目的として、保持ピース５３
が介装されている（図１８および図１９参照）。Rolling element rolling grooves 13 extending in the axial direction are formed on both side surfaces of the guide rail 10, and the slider body 12A of the slider 12 has rolling element rolling grooves on the inner side surfaces of both sleeve portions 14 thereof. A rolling element rolling groove 31 facing the moving groove 13 is formed. A large number of balls 5 as rolling elements are rotatably mounted between these rolling element rolling grooves 13 and 31 facing each other, and the slider 12 guides the slider 12 through the rolling of the balls 5. It can be moved relative to the top along the axial direction. Although not shown in FIG. 20, a holding piece is provided between the balls 5 for the purpose of reducing noise by eliminating collision noise between the balls 5 during driving, similarly to the ball screw device. 53
Is interposed (see FIGS. 18 and 19).

【０００８】そして、スライダ１２の移動につれて、案
内レール１０とスライダ１２との間に介在するボール５
は転動してスライダ１２の端部に移動するが、スライダ
１２を軸方向に継続して移動させていくためには、これ
らのボール５を無限に循環させる必要がある。このた
め、スライダ本体１２Ａの袖部１４内に更に軸方向に貫
通する直線状の転動体通路１８を形成すると共に、スラ
イダ本体１２Ａの前後両端にそれぞれ転動体循環部品と
してのコ字状のエンドキャップ１５をサイドシール１１
と共にねじ２２を介して固定し、このエンドキャップ１
５に上記両転動体転動溝１３，３１間と上記転動体通路
１８とを連通する半円弧状に湾曲した転動体循環部１６
を形成することにより、転動体無限循環軌道を構成して
いる。As the slider 12 moves, the ball 5 interposed between the guide rail 10 and the slider 12 is moved.
Moves to the end of the slider 12, but in order to continuously move the slider 12 in the axial direction, it is necessary to circulate these balls 5 indefinitely. For this reason, a linear rolling element passage 18 that further penetrates in the axial direction is formed in the sleeve portion 14 of the slider body 12A, and U-shaped end caps as rolling element circulation parts are formed at the front and rear ends of the slider body 12A, respectively. 15 for side seal 11
Fixed with screws 22 together with this end cap 1
5 is a rolling element circulating portion 16 which is curved in a semi-circular shape and which connects the rolling element rolling grooves 13 and 31 with the rolling element passage 18.
By forming the, the rolling element infinite circulation orbit is constituted.

【０００９】なお、図において符号２０はスライダ本体
１２Ａの端面にエンドキャップ１５およびサイドシール
１１をねじ止め固定するためのタップ穴、２３は給脂用
のグリースニップルである。ところで、このようなボー
ルねじ装置やリニアガイド装置を長時間使用した場合、
転動体と接触しているリテーニングピースの保持凹面が
摩耗する。リテーニングピースの保持凹面が摩耗する
と、該凹面の表面が破損したりトルクが増大するばかり
ではなく、転動体間のスペースの増加を招く。In the figure, reference numeral 20 is a tap hole for screwing and fixing the end cap 15 and the side seal 11 to the end surface of the slider body 12A, and 23 is a grease nipple for greasing. By the way, when such a ball screw device or linear guide device is used for a long time,
The retaining concave surface of the retaining piece that is in contact with the rolling element is worn. When the holding concave surface of the retaining piece is worn, not only the surface of the concave surface is damaged or the torque is increased, but also the space between the rolling elements is increased.

【００１０】ボールねじ装置やリニアガイド装置では、
装置内を循環する転動体の個数が数十個に及ぶため、各
転動体間のスペースの増加は、積算されて循環経路内ボ
ール列のスペースの大幅な増加を招き、リテーニングピ
ースが横倒れを起こす等の不具合が生じる。リテーニン
グピースの横倒れは、ボールの詰まりや、それに起因す
るロック状態を招き、装置の致命的な欠陥となる。In the ball screw device and the linear guide device,
Since the number of rolling elements circulating in the equipment reaches dozens, the increase in the space between each rolling element is added up, which causes a large increase in the space of the ball rows in the circulation path, causing the retaining piece to fall sideways. And other problems occur. The lateral fall of the retaining piece causes the ball to be clogged and the resulting locked state, which is a fatal defect of the device.

【００１１】したがって、このような不具合を回避する
ために、通常、リテーニングピースの保持凹面に潤滑油
やグリースなどの潤滑剤を充填してリテーニングピース
の凹面の摩耗を避けるようにしているが、装置寿命の延
長を図るためには、更なる改善が必要である。このよう
な問題の解決を試みたリテーニングピースの例として、
特開２０００−１９９５５６号公報に記載のものがあ
り、ここでは、リテーニングピースの保持凹面に複数の
突起又は窪みを分散形成することにより、突起と突起の
間又は窪みに潤滑剤を保持するようにして該凹面の摩耗
を防止するようにしている。Therefore, in order to avoid such a problem, usually, the retaining concave surface of the retaining piece is filled with a lubricant such as lubricating oil or grease to avoid wear of the concave surface of the retaining piece. In order to extend the life of the device, further improvement is necessary. As an example of the retaining piece that tried to solve such a problem,
Japanese Patent Laid-Open No. 2000-199556 discloses a technique in which a plurality of protrusions or depressions are dispersedly formed on the retaining concave surface of the retaining piece so that the lubricant is retained between the protrusions or in the depressions. The wear of the concave surface is prevented.

【００１２】[0012]

【発明が解決しようとする課題】しかしながら、リテー
ニングピースの凹面に突起を分散形成した場合には、転
動体荷重を突起で受けるため、突起の先端が摩耗しやす
くなり、一方、窪みを分散形成した場合には、潤滑剤を
保持する窪みが独立しているため、該窪みに潤滑剤が充
填されにくく、一度窪みから出た潤滑剤は補給経路がな
いため保持凹面と転動体との接触部への補充が難しく、
いずれにしても保持凹面の摩耗の進行が速くなって装置
寿命の十分な延長を図ることができないという不都合が
ある。However, when the projections are dispersedly formed on the concave surface of the retaining piece, the load of the rolling elements is received by the projections, so that the tips of the projections are easily worn and the depressions are dispersedly formed. In this case, since the recess holding the lubricant is independent, it is difficult to fill the recess with the lubricant, and the lubricant once exiting the recess does not have a replenishing route, so the contact surface between the holding concave surface and the rolling element Is difficult to replenish,
In any case, there is an inconvenience that wear of the holding concave surface progresses quickly and the life of the apparatus cannot be sufficiently extended.

【００１３】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、リテーニングピースの保持凹面
と転動体との接触部に潤滑剤を効果的に補充できるよう
にして該凹面の摩耗を緩和することができ、これによ
り、装置寿命の延長を図ることができると共に、リテー
ニングピースの横倒れ等を防止することができる直動装
置を提供することを目的とする。The present invention has been made in order to eliminate such inconvenience, and it is possible to effectively replenish the contact portion between the retaining concave surface of the retaining piece and the rolling element with a lubricant so that the concave surface is worn. Therefore, it is an object of the present invention to provide a linear motion device capable of extending the life of the device and preventing the retaining piece from falling sideways.

【００１４】[0014]

【課題を解決するための手段】上記目的を達成するため
に、請求項１に係る発明は、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軸と、該案内軸の前
記転動体転動溝に対向する転動体転動溝を有し、これら
の転動体転動溝間に挿入された多数の転動体の転動を介
して軸方向に沿って相対移動可能に前記案内軸に支持さ
れ、且つ、該転動体の循環通路を有すると共に各転動体
の間に該転動体を保持するリテーニングピースが介装さ
れた可動体とを備えた直動装置において、前記リテーニ
ングピースの前記転動体の保持凹面に線状の油保持溝を
設けたことを特徴とする。In order to achieve the above object, the invention according to claim 1 has a guide shaft extending in the axial direction having a rolling element rolling groove extending in the axial direction, and the guide shaft. It has a rolling element rolling groove that opposes the rolling element rolling groove of the shaft, and is relatively movable along the axial direction through the rolling of a large number of rolling elements inserted between these rolling element rolling grooves. And a movable body supported by the guide shaft and having a circulation passage for the rolling elements and having a retaining piece interposed between the rolling elements for holding the rolling elements, A linear oil retaining groove is provided on a retaining concave surface of the rolling element of the retaining piece.

【００１５】上記手段によれば、リテーニングピースの
保持凹面に設けられた線状の油保持溝内に表面張力で潤
滑剤が保持され、該油保持溝から保持凹面と転動体との
接触部に潤滑剤が効果的に補充される。この結果、リテ
ーニングピースの保持凹面の摩耗が緩和され、装置寿命
の延長を図ることができると共に、リテーニングピース
の横倒れ等を防止することができる。According to the above means, the lubricant is retained by the surface tension in the linear oil retaining groove provided in the retaining concave surface of the retaining piece, and the contact portion between the retaining concave surface and the rolling element is brought from the oil retaining groove. The lubricant is effectively replenished. As a result, the wear of the retaining concave surface of the retaining piece is reduced, the life of the device can be extended, and the retaining piece can be prevented from falling sideways.

【００１６】請求項２に係る発明は、請求項１におい
て、前記保持凹面に対する前記油保持溝の面積比を５０
％以下としたことを特徴とする。上記手段によれば、リ
テーニングピースの保持凹面の摩耗をより緩和すること
ができる。According to a second aspect of the present invention, in the first aspect, the area ratio of the oil holding groove to the holding concave surface is 50.
% Or less. According to the above means, it is possible to further reduce the wear of the retaining concave surface of the retaining piece.

【００１７】[0017]

【発明の実施の形態】以下、本発明の実施の形態を図を
参照して説明する。図１は本発明の第１の実施の形態で
ある直動装置に用いられるリテーニングピースの正面図
（軸方向の端部側から見た図）、図２は図１の横断面
図、図３はリテーニングピースの保持凹面と転動体との
接触部に油保持溝から潤滑剤が供給される様子を説明す
るための説明図、図４は油保持溝の形状による該油保持
溝内の油の表面張力と液面の曲率半径との関係を説明す
るための説明図、図５〜図１６は本発明の他の実施の形
態を説明するための図である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a front view of a retaining piece used in a linear motion device according to a first embodiment of the present invention (a view as seen from the end side in the axial direction), and FIG. 2 is a cross-sectional view of FIG. 3 is an explanatory view for explaining how the lubricant is supplied from the oil holding groove to the contact portion between the holding concave surface of the retaining piece and the rolling element, and FIG. 4 is a view showing the shape of the oil holding groove in the oil holding groove. Explanatory drawing for explaining the relationship between the surface tension of the oil and the radius of curvature of the liquid surface, and FIGS. 5 to 16 are views for explaining another embodiment of the present invention.

【００１８】なお、各実施の形態共に、図１７〜図１９
で説明した従来のボールねじ装置に対して各ボール間に
介装されるリテーニングピースのが相違するだけである
ため、リテーニングピースについてのみ説明する。ま
た、ここではボールねじ装置の各ボール間に介装される
リテーニングピースに本発明を適用した場合を例に採る
が、図２０に示すリニアガイド装置の各ボール間に介装
されるリテーニングピースに本発明を適用してもよいの
は勿論である。In each of the embodiments, FIGS.
Since only the retaining piece interposed between the balls is different from the conventional ball screw device described in 1), only the retaining piece will be described. Further, here, the case where the present invention is applied to the retaining piece interposed between the balls of the ball screw device is taken as an example, but the retaining member interposed between the balls of the linear guide device shown in FIG. 20 is used. Of course, the present invention may be applied to a piece.

【００１９】まず、本発明の第１の実施の形態から説明
すると、図１および図２において符号１００は、駆動時
の各ボール５同士の衝突音を無くして低騒音化を図るべ
く、各ボール５間に介装されたリテーニングピースであ
り、このリテーニングピース１００は中央部に貫通穴１
０１を有する円筒状をなしてボール５に対向する軸方向
の両端面にそれぞれ該ボール５を保持するゴシックアー
チ状の保持凹面１０２が形成されている。なお保持凹面
１０２は、球面状、円錐状等の形状でもよい。First, the first embodiment of the present invention will be described. In FIGS. 1 and 2, reference numeral 100 indicates each ball 5 in order to eliminate collision noise between the balls 5 during driving and to reduce noise. It is a retaining piece interposed between the five, and this retaining piece 100 has a through hole 1 at the center.
A holding concave surface 102 having a Gothic arch shape for holding the ball 5 is formed on both end surfaces in the axial direction facing the ball 5 in a cylindrical shape having 01. The holding concave surface 102 may have a spherical shape, a conical shape, or the like.

【００２０】ここで、この実施の形態では、リテーニン
グピース１００の保持凹面１０２に同心円状の線状の油
保持溝１０３を多数設けている。油保持溝１０３の幅お
よび深さは潤滑剤が毛細管現象で該油保持溝１０３内に
広がりやすい寸法、例えば１ｍｍ以下とされている。こ
のようにこの実施の形態では、リテーニングピース１０
０の保持凹面１０２に線状の油保持溝１０３が形成され
ているため、潤滑剤は毛細管現象により油保持溝１０３
内に広がりやすく、更に一度油保持溝１０３内に引き込
まれた潤滑剤は表面張力により保持されて潤滑剤のリザ
ーバーとして機能するので、該油保持溝１０３から保持
凹面１０２とボール５との接触部に潤滑剤が効果的に補
充される。これにより、リテーニングピース１００の保
持凹面１０２の摩耗が緩和され、装置寿命の延長を図る
ことができると共に、リテーニングピース１００の横倒
れ等を防止することができる。In this embodiment, the retaining concave surface 102 of the retaining piece 100 is provided with a large number of concentric linear oil retaining grooves 103. The width and depth of the oil holding groove 103 are set to a dimension such that the lubricant easily spreads in the oil holding groove 103 due to a capillary phenomenon, for example, 1 mm or less. Thus, in this embodiment, the retaining piece 10
Since the linear oil holding groove 103 is formed on the holding concave surface 102 of 0, the lubricant is oil-holding groove 103 due to the capillary phenomenon.
Since the lubricant that easily spreads inside and is drawn into the oil holding groove 103 once is held by the surface tension and functions as a lubricant reservoir, the contact portion between the holding concave surface 102 and the ball 5 from the oil holding groove 103. The lubricant is effectively replenished. As a result, wear of the holding concave surface 102 of the retaining piece 100 is reduced, the life of the device can be extended, and the retaining piece 100 can be prevented from falling sideways.

【００２１】また、図３に示すように、リテーニングピ
ース１００の保持凹面１０２（油保持溝１０３以外のフ
ラットな面（実際には曲面）とボール５が近接する部分
では両者の間に楔状の空間が形成され、油保持溝１０３
の近傍をボール５が通過する場合に、毛細管現象により
油保持溝１０３からボール５とリテーニングピース１０
０の保持凹面１０２（フラット面）との間に潤滑剤が引
き込まれ、ボール５と保持凹面１０２との接触部に潤滑
剤が供給される。As shown in FIG. 3, the retaining concave surface 102 of the retaining piece 100 (a flat surface (actually a curved surface) other than the oil retaining groove 103 and a ball 5 are wedge-shaped between the two in the vicinity thereof. A space is formed and the oil holding groove 103 is formed.
When the ball 5 passes through the vicinity of the ball 5, the ball 5 and the retaining piece 10 are removed from the oil holding groove 103 by a capillary phenomenon.
The lubricant is drawn in between the holding concave surface 102 (flat surface) of 0, and the lubricant is supplied to the contact portion between the ball 5 and the holding concave surface 102.

【００２２】ここで、保持凹面１０２のフラット面の面
積が小さいと、ここで受ける面圧が高くなって表面が摩
耗しやすくなるので、これを回避するために、保持凹面
１０３に設けられ線状の油保持溝１０３の面積は保持凹
面１０２全体の５０％以下としている。図４は、油保持
溝内の潤滑剤の液面の変化に対する表面張力の変化を断
面矩形状の油保持溝と断面三角形状の油保持溝とで比較
したものである。Here, if the area of the flat surface of the holding concave surface 102 is small, the surface pressure received here becomes high and the surface is likely to be worn. Therefore, in order to avoid this, a linear shape is provided on the holding concave surface 103. The area of the oil holding groove 103 is 50% or less of the entire holding concave surface 102. FIG. 4 compares changes in surface tension with respect to changes in the liquid level of the lubricant in the oil holding groove between the oil holding groove having a rectangular cross section and the oil holding groove having a triangular cross section.

【００２３】図４（ａ）に示した断面矩形状の油保持溝
では、潤滑剤の液面が変化しても液面の曲率半径Ｒは変
化しないため（ＲI ＝ＲII）、表面張力は変化しない
（ＰI＝ＰII）。一方、図４（ｂ）に示した断面三角形
状の油保持溝では、潤滑剤の液面が下がるほど液面の曲
率半径Ｒは小さくなる（ＲI ＞ＲII）。液面の表面張力
Ｐは液面の曲率半径Ｒに反比例するので、この表面張力
Ｐは液面が下がるほど大きくなる。In the oil holding groove having a rectangular cross section shown in FIG. 4 (a), even if the liquid surface of the lubricant changes, the radius of curvature R of the liquid surface does not change (R I = R II ). Does not change (P I = P II ). On the other hand, in the oil holding groove having a triangular cross section shown in FIG. 4B, the radius of curvature R of the liquid surface decreases as the liquid surface of the lubricant decreases (R I > R II ). Since the surface tension P of the liquid surface is inversely proportional to the radius of curvature R of the liquid surface, the surface tension P increases as the liquid surface decreases.

【００２４】図３で説明したように、断面三角形状の油
保持溝１０３からボール５とリテーニングピース１００
の保持凹面１０２表面との間に潤滑剤が供給される場
合、線状の溝を伝って潤滑剤が補給されるが、その速度
は図４に示した液面の表面張力の大きさに依存する。断
面三角形状の油保持溝１０３の場合、上述したように液
面が下がるほど表面張力が大きくなるので、線状の油保
持溝内で潤滑剤が一部分減少した場合の該潤滑剤の補給
が断面矩形状の油保持溝に比較してスムーズに行われ
る。As described with reference to FIG. 3, the ball 5 and the retaining piece 100 are inserted from the oil holding groove 103 having a triangular cross section.
When the lubricant is supplied to the surface of the holding concave surface 102, the lubricant is supplied through the linear groove, but its speed depends on the magnitude of the surface tension of the liquid surface shown in FIG. To do. In the case of the oil holding groove 103 having a triangular cross section, the surface tension increases as the liquid level decreases as described above, so that the replenishment of the lubricant when the lubricant partially decreases in the linear oil holding groove is Smoother than the rectangular oil retention groove.

【００２５】以上の理由から、油保持溝の形状は断面三
角形状のように溝深さ方向に向かって先細りとなる形状
が望ましい。また、リテーニングピースは、通常、射出
成形により加工され、金型に油保持溝のパターンを形成
することで保持凹面に溝パターンを容易に形成すること
ができる。ここで、射出成形の抜き取り工程の容易さに
おいても、断面三角形状の油保持溝は断面矩形状のもの
に比べて望ましい。For the above reason, it is desirable that the oil retaining groove has a triangular shape in cross section and is tapered in the groove depth direction. Further, the retaining piece is usually processed by injection molding, and the groove pattern can be easily formed on the holding concave surface by forming the oil holding groove pattern on the die. Here, the oil holding groove having a triangular cross section is more desirable than the oil holding groove having a rectangular cross section, even in the ease of the extraction step of injection molding.

【００２６】なお、本発明の直動装置、リテーニングピ
ースおよび油保持溝の構成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。例えば、図５および図６は本発
明の第２の実施の形態を示すもので、油保持溝１０３を
リテーニングピース１００の保持凹面１０２の中心から
外周側に向けて放射状に設けた例である。The configurations of the linear motion device, the retaining piece and the oil retaining groove of the present invention are not limited to those in the above embodiment, and can be changed as appropriate without departing from the scope of the present invention. For example, FIG. 5 and FIG. 6 show the second embodiment of the present invention, and are examples in which the oil retaining grooves 103 are provided radially from the center of the retaining concave surface 102 of the retaining piece 100 toward the outer peripheral side. .

【００２７】この例では、リテーニングピース１００の
外周面および貫通穴１０１に油保持溝１０３が繋がって
いるために、保持凹面１０２に設けられた油保持溝１０
３内の潤滑剤が枯渇した場合には、リテーニングピース
１００の外周面および貫通穴１０１の内径に保持された
潤滑剤が毛細管現象により油保持溝１０３に供給され
る。In this example, since the oil retaining groove 103 is connected to the outer peripheral surface of the retaining piece 100 and the through hole 101, the oil retaining groove 10 provided in the retaining concave surface 102.
When the lubricant in 3 is exhausted, the lubricant retained on the outer peripheral surface of the retaining piece 100 and the inner diameter of the through hole 101 is supplied to the oil retaining groove 103 by the capillary phenomenon.

【００２８】また、リテーニングピース１００の外周面
および／又は貫通穴１０１の内径に油保持溝１０３に連
通する溝１０４を形成して潤滑剤を保持することで、リ
ザーバの効果をより高めることができる。図７および図
８は本発明の第３の実施の形態を示したもので、油保持
溝１０３をリテーニングピース１００の保持凹面１０２
の中心から外周側に向けて螺旋状に設けた例である。Further, by forming a groove 104 communicating with the oil holding groove 103 on the outer peripheral surface of the retaining piece 100 and / or the inner diameter of the through hole 101 to hold the lubricant, the effect of the reservoir can be further enhanced. it can. 7 and 8 show a third embodiment of the present invention, in which the oil holding groove 103 is provided on the retaining concave surface 102 of the retaining piece 100.
In this example, the spiral shape is provided from the center to the outer peripheral side.

【００２９】この例では、保持凹面１０２に設けられた
油保持溝１０３内の潤滑剤が枯渇した場合に、リテーニ
ングピース１００の外周面および貫通穴１０１の内径に
保持された潤滑剤が毛細管現象により油保持溝１０３に
供給される効果については上記第２の実施の形態と同様
であるが、螺旋状の油保持溝１０３の長さが直線状の放
射状溝に比べて長くなるため、油保持溝１０３に保持す
る潤滑剤の量を多くすることができる。なお、この場合
も、上記第２の実施の形態のように、リテーニングピー
ス１００の外周面および／又は貫通穴１０１の内径に油
保持溝１０３に連通する溝１０４を形成して潤滑剤を保
持するようにしてもよい。In this example, when the lubricant in the oil holding groove 103 provided in the holding concave surface 102 is exhausted, the lubricant held on the outer peripheral surface of the retaining piece 100 and the inner diameter of the through hole 101 is capillary phenomenon. The effect of supplying the oil to the oil holding groove 103 is the same as that of the second embodiment, but since the length of the spiral oil holding groove 103 is longer than that of the linear radial groove, the oil holding groove 103 is held. The amount of lubricant held in the groove 103 can be increased. Also in this case, as in the second embodiment described above, a groove 104 communicating with the oil holding groove 103 is formed in the outer peripheral surface of the retaining piece 100 and / or the inner diameter of the through hole 101 to hold the lubricant. You may do it.

【００３０】図９および図１０は本発明の第４の実施の
形態を示したもので、上記第１の実施の形態の同心円状
の油保持溝１０３と上記第２の実施の形態の放射線状の
油保持溝１０３とを組み合わせた例である。この例で
は、上記第１〜第３の実施の形態に比較して油保持溝１
０３での潤滑剤の保持量を多くすることができ、また、
保持凹面１０２に円周方向と半径方向に油保持溝１０３
が形成されているため、毛細管現象による潤滑剤の補充
もスムーズに行なうことができる。FIG. 9 and FIG. 10 show a fourth embodiment of the present invention. The concentric oil holding groove 103 of the first embodiment and the radial shape of the second embodiment are described. This is an example of a combination with the oil holding groove 103. In this example, the oil holding groove 1 is different from the first to third embodiments.
It is possible to increase the amount of lubricant retained in 03, and
The oil holding groove 103 is formed in the holding concave surface 102 in the circumferential direction and the radial direction.
As a result, the lubricant can be replenished smoothly due to the capillary phenomenon.

【００３１】図１１および図１２は本発明の第５の実施
の形態を示したもので、上記第１の実施の形態の同心円
状の油保持溝１０３と上記第３の実施の形態の螺旋状の
油保持溝１０３とを組み合わせた例であり、図１３およ
び図１４は本発明の第６の実施の形態でリテーニングピ
ース１００の保持凹面１０２に縦横の格子状の油保持溝
１０３を設けた例であり、図１５および図１６は本発明
の第７の実施の形態でリテーニングピース１００の保持
凹面１０２に油保持溝１０３をランダムに配置した例で
あり、いずれも同様の効果が得られる。11 and 12 show a fifth embodiment of the present invention. The concentric oil holding groove 103 of the first embodiment and the spiral shape of the third embodiment are shown. 13 and 14 show an example in which the oil holding groove 103 of FIG. 13 and FIG. 14 is provided in the holding concave surface 102 of the retaining piece 100 in the sixth embodiment of the present invention. FIG. 15 and FIG. 16 are examples, in which the oil retaining grooves 103 are randomly arranged on the retaining concave surface 102 of the retaining piece 100 in the seventh embodiment of the present invention, and the same effect can be obtained. .

【００３２】[0032]

【発明の効果】上記の説明から明らかなように、本発明
によれば、リテーニングピースの保持凹面と転動体との
接触部に潤滑剤が効果的に補充されて該凹面の摩耗を緩
和することができるので、装置寿命の延長を図ることが
できると共に、リテーニングピースの横倒れ等を防止す
ることができるという効果が得られる。As is apparent from the above description, according to the present invention, the contact portion between the retaining concave surface of the retaining piece and the rolling element is effectively replenished with the lubricant to reduce the wear of the concave surface. Therefore, the life of the device can be extended and the retaining piece can be prevented from falling sideways.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１の実施の形態である直動装置に用
いられるリテーニングピースの正面図（軸方向の端部側
から見た図）である。FIG. 1 is a front view of a retaining piece used in a linear motion device according to a first embodiment of the present invention (a view seen from an end portion side in an axial direction).

【図２】図１の横断面図である。2 is a cross-sectional view of FIG.

【図３】リテーニングピースの保持凹面と転動体との接
触部に油保持溝から潤滑剤が供給される様子を説明する
ための説明図である。FIG. 3 is an explanatory diagram for explaining how lubricant is supplied from an oil retaining groove to a contact portion between a retaining concave surface of a retaining piece and a rolling element.

【図４】油保持溝の形状による該油保持溝内の油の表面
張力と液面の曲率半径との関係を説明するための説明図
であり、（ａ）は断面矩形状の油保持溝、（ｂ）は断面
三角形状の油保持溝である。FIG. 4 is an explanatory diagram for explaining the relationship between the surface tension of oil in the oil holding groove and the radius of curvature of the liquid surface depending on the shape of the oil holding groove, and FIG. 4A is an oil holding groove having a rectangular cross section. , (B) are oil holding grooves having a triangular cross section.

【図５】本発明の第２の実施の形態である直動装置に用
いられるリテーニングピースの正面図（軸方向の端部側
から見た図）である。FIG. 5 is a front view of a retaining piece used in a linear motion device according to a second embodiment of the present invention (a view seen from the end side in the axial direction).

【図６】図５の横断面図である。6 is a cross-sectional view of FIG.

【図７】本発明の第３の実施の形態である直動装置に用
いられるリテーニングピースの正面図（軸方向の端部側
から見た図）である。FIG. 7 is a front view (a view seen from an end portion side in the axial direction) of a retaining piece used in a linear motion device that is a third embodiment of the present invention.

【図８】図７の横断面図である。8 is a cross-sectional view of FIG.

【図９】本発明の第４の実施の形態である直動装置に用
いられるリテーニングピースの正面図（軸方向の端部側
から見た図）である。FIG. 9 is a front view (a view as seen from an end portion side in the axial direction) of a retaining piece used in a linear motion device that is a fourth embodiment of the present invention.

【図１０】図９の横断面図である。10 is a cross-sectional view of FIG.

【図１１】本発明の第５の実施の形態である直動装置に
用いられるリテーニングピースの正面図（軸方向の端部
側から見た図）である。FIG. 11 is a front view of the retaining piece used in the linear motion device according to the fifth embodiment of the present invention (a view seen from the end side in the axial direction).

【図１２】図１１の横断面図である。12 is a cross-sectional view of FIG.

【図１３】本発明の第６の実施の形態である直動装置に
用いられるリテーニングピースの正面図（軸方向の端部
側から見た図）である。FIG. 13 is a front view of the retaining piece used in the linear motion device according to the sixth embodiment of the present invention (a view seen from the end portion side in the axial direction).

【図１４】図１３の横断面図である。14 is a cross-sectional view of FIG.

【図１５】本発明の第７の実施の形態である直動装置に
用いられるリテーニングピースの正面図（軸方向の端部
側から見た図）である。FIG. 15 is a front view of a retaining piece used in a linear motion device according to a seventh embodiment of the present invention (a view seen from an end side in the axial direction).

【図１６】図１５の横断面図である。16 is a cross-sectional view of FIG.

【図１７】直動装置の一例としてのボールねじ装置を説
明するための一部を破断した斜視図である。FIG. 17 is a partially cutaway perspective view for explaining a ball screw device as an example of a linear motion device.

【図１８】従来のボールねじ装置に用いられるリテーニ
ングピースの正面図（軸方向の端部側から見た図）であ
る。FIG. 18 is a front view of a retaining piece used in a conventional ball screw device (a view seen from an axial end portion side).

【図１９】図１８の横断面図である。19 is a cross-sectional view of FIG.

【図２０】直動装置の他の例としてのリニアガイド装置
を説明するための一部を破断した斜視図である。FIG. 20 is a partially cutaway perspective view for explaining a linear guide device as another example of the linear motion device.

【符号の説明】[Explanation of symbols]

１…ボールねじ装置（直動装置） ２…ねじ溝（転動体転動溝） ３…ねじ軸（案内軸） ４…ねじ溝（転動体転動溝） ５…ボール（転動体） ６…ボールナット（可動体） １００…リテーニングピース １０２…保持凹面 １０３…油保持溝 1 ... Ball screw device (direct acting device) 2… Screw groove (rolling element rolling groove) 3 ... Screw shaft (guide shaft) 4 ... Screw groove (rolling element rolling groove) 5 ... Ball (rolling element) 6 ... Ball nut (movable body) 100 ... Retaining piece 102 ... Retaining concave surface 103 ... Oil retaining groove

───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3J062 AA25 AA38 AB22 AC07 BA27 CD08 CD63 CD75 3J101 AA03 AA33 AA44 AA64 AA71 AA85 BA12 BA13 BA15 CA14 FA04 FA32 GA32 GA55 3J104 AA03 AA23 AA36 AA65 AA69 AA74 BA15 DA05 EA06    ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3J062 AA25 AA38 AB22 AC07 BA27                       CD08 CD63 CD75                 3J101 AA03 AA33 AA44 AA64 AA71                       AA85 BA12 BA13 BA15 CA14                       FA04 FA32 GA32 GA55                 3J104 AA03 AA23 AA36 AA65 AA69                       AA74 BA15 DA05 EA06

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 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軸と、該案内軸の前記転動体転動
溝に対向する転動体転動溝を有し、これらの転動体転動
溝間に挿入された多数の転動体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軸に支持され、且つ、該
転動体の循環通路を有すると共に各転動体の間に該転動
体を保持するリテーニングピースが介装された可動体と
を備えた直動装置において、 前記リテーニングピースの前記転動体の保持凹面に線状
の油保持溝を設けたことを特徴とする直動装置。1. A guide shaft that has a rolling element rolling groove that extends in the axial direction and that extends in the axial direction, and a rolling element rolling groove that faces the rolling element rolling groove of the guide shaft. Through the rolling of a large number of rolling elements inserted between these rolling element rolling grooves, the rolling element is supported by the guide shaft so as to be relatively movable along the axial direction, and has a circulation passage for the rolling elements. A linear motion device comprising a movable body in which a retaining piece for holding the rolling element is interposed between rolling elements, wherein a linear oil retaining groove is provided on a retaining concave surface of the rolling element of the retaining piece. A direct-acting device characterized by that. 【請求項２】 前記保持凹面に対する前記油保持溝の面
積比を５０％以下としたことを特徴とする請求項１記載
の直動装置。2. The linear motion device according to claim 1, wherein an area ratio of the oil holding groove to the holding concave surface is 50% or less.
JP2002042280A 2002-02-19 2002-02-19 Linear motion device Pending JP2003239982A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002042280A JP2003239982A (en) 2002-02-19 2002-02-19 Linear motion device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002042280A JP2003239982A (en) 2002-02-19 2002-02-19 Linear motion device

Publications (1)

Publication Number Publication Date
JP2003239982A true JP2003239982A (en) 2003-08-27

Family

ID=27782445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002042280A Pending JP2003239982A (en) 2002-02-19 2002-02-19 Linear motion device

Country Status (1)

Country Link
JP (1) JP2003239982A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005015971A1 (en) * 2005-04-07 2006-10-12 Schaeffler Kg Linear guide with cage chain
JP2007218373A (en) * 2006-02-17 2007-08-30 Yaskawa Electric Corp Solid lubrication roller bearing
JP2008508478A (en) * 2004-07-30 2008-03-21 シエツフレル コマンディートゲゼルシャフト Ball screw transmission
CN102979821A (en) * 2011-12-20 2013-03-20 西安奥奈特固体润滑工程学研究有限公司 Design method of single-row deep groove ball bearings
JP2015042883A (en) * 2013-08-26 2015-03-05 日野自動車株式会社 Bearing structure
CN117189776A (en) * 2023-08-22 2023-12-08 乐清市三环精密机械有限公司 Self-lubricating rolling ball linear guide rail pair

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008508478A (en) * 2004-07-30 2008-03-21 シエツフレル コマンディートゲゼルシャフト Ball screw transmission
JP4904467B2 (en) * 2004-07-30 2012-03-28 シェフラー テクノロジーズ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト Ball screw transmission
DE102005015971A1 (en) * 2005-04-07 2006-10-12 Schaeffler Kg Linear guide with cage chain
JP2006292172A (en) * 2005-04-07 2006-10-26 Schaeffler Kg Linear guide with cage chain body
US7458723B2 (en) 2005-04-07 2008-12-02 Schaeffler Kg Linear guide with cage chain
EP1710457A3 (en) * 2005-04-07 2009-05-06 Schaeffler KG Linear bearing with a rolling element chain having lubricant pockets in the cage
JP2007218373A (en) * 2006-02-17 2007-08-30 Yaskawa Electric Corp Solid lubrication roller bearing
CN102979821A (en) * 2011-12-20 2013-03-20 西安奥奈特固体润滑工程学研究有限公司 Design method of single-row deep groove ball bearings
JP2015042883A (en) * 2013-08-26 2015-03-05 日野自動車株式会社 Bearing structure
CN117189776A (en) * 2023-08-22 2023-12-08 乐清市三环精密机械有限公司 Self-lubricating rolling ball linear guide rail pair
CN117189776B (en) * 2023-08-22 2024-05-28 乐清市三环精密机械有限公司 Self-lubricating rolling ball linear guide rail pair

Similar Documents

Publication Publication Date Title
JP3948973B2 (en) Screw device with lubricant application function
JP2000120825A (en) Ball screw mechanism and linear motion device
US6513978B2 (en) Rolling element spacers for rolling guide units
WO2019172446A1 (en) Tapered roller bearing
JP2008240796A (en) Angular contact ball bearing with seal, and spindle device
JP2003239982A (en) Linear motion device
JP2006071016A (en) Retainer for ball bearing
JP5286959B2 (en) Cylindrical roller bearing
JP5610013B2 (en) Cylindrical roller bearing
JP4941134B2 (en) Linear motion screw device
JP2008232420A (en) Cage for radial ball bearing, and radial ball bearing
WO2019235578A1 (en) Ball bearing
JP2008240826A (en) Ball bearing and retainer
JP2007333016A (en) Main spindle device of machine tool
JP5994369B2 (en) Angular contact ball bearings
JP6191716B2 (en) Angular contact ball bearings
KR102647697B1 (en) Tandem Ball Bearing
JP2008002495A (en) Automatic aligning roller bearing
JP2010090912A (en) Cylindrical roller bearing
JP2014196811A (en) Lubricant supply mechanism for linear guide, linear guide including the same, and lubricant supply method for linear guide
JP2014163411A (en) Lubricant supply mechanism for linear guide, linear guide including the same, and lubricant supply method for linear guide
JP2013061067A (en) Lubricant supply mechanism for linear guide, linear guide having the mechanism, and lubricant supply method for linear guide
JP2008261477A (en) Radial ball bearing cage and radial ball bearing
JP2003184986A (en) Linearly moving device
JP4752250B2 (en) Ball screw device