JPH1089364A - Solid lubricated cross roller bearing - Google Patents
Solid lubricated cross roller bearingInfo
- Publication number
- JPH1089364A JPH1089364A JP8267973A JP26797396A JPH1089364A JP H1089364 A JPH1089364 A JP H1089364A JP 8267973 A JP8267973 A JP 8267973A JP 26797396 A JP26797396 A JP 26797396A JP H1089364 A JPH1089364 A JP H1089364A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- pseudo
- outer ring
- bearing
- rollers
- 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.)
- Granted
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
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6696—Special parts or details in view of lubrication with solids as lubricant, e.g. dry coatings, powder
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
- F16C19/361—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with cylindrical rollers
- F16C19/362—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with cylindrical rollers the rollers being crossed within the single row
-
- 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
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/40—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings with loose spacing bodies between the rollers
-
- 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
- F16C33/3713—Loose spacing bodies with other rolling elements serving as spacing bodies, e.g. the spacing bodies are in rolling contact with the load carrying rolling elements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、真空中や放射線下
あるいは高温または低温環境などの過酷な環境条件で使
用される固体潤滑クロスローラ軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid lubricated cross roller bearing used under severe environmental conditions such as in a vacuum, under radiation, or in a high or low temperature environment.
【０００２】[0002]
【従来の技術】クロスローラ軸受の第１の従来例をとし
て、内輪と、外輪のそれぞれ対向する面に設けた円周方
向に伸びる二つの転走面からなるＶ形転走溝の間に挿入
した複数のローラの保持のために金属製のリング状保持
器を用いたものが提案されている。図５において、
（ａ）はリング状保持器を用いた軸受の側面図、（ｂ）
はリング状保持器の斜視図である。クロスローラ軸受は
基本的には、内輪１およびそれに対向する二つ割の外輪
２と、内輪１の外周面に設けた内輪Ｖ形転走溝３と、外
輪２の内周面に内輪Ｖ形転走溝３と対向して設けた同形
の外輪Ｖ形転走溝４と、内輪および外輪Ｖ形転走溝３、
４を転動するローラ６で構成されている。リング状保持
器８には、複数個のローラ６を４５°傾斜させて回転自
在に保持させるための楕円形状のポケット孔８１が穿設
され、各ロ−ラ６をポケット孔８１に通した状態で、そ
の外側に外輪２の各分割片を係合して数箇所をネジ止め
したものである。こうすることにより、外輪２と内輪１
との間で各ロ−ラ６は軸受の中心軸線に対して４５°傾
斜した軸線を回転軸として転がり運動をするものであ
る。また、第２の従来例として、ローラの保持用に樹脂
製のスペーサリテーナを用いたクロスロ−ラ軸受が提案
されている。なお、内輪、外輪、ロ−ラの基本的な軸受
の構成は第１の従来例と同じである。図６は第２の従来
例のスペーサリテーナの平面図である。複数個のロ−ラ
６の間に介装させて保持するスペーサリテーナ９とから
なるクロスローラ軸受において、スペーサリテーナ９に
は、その左右両側面に互いに隣接するロ−ラ６が回転可
能に嵌合する曲面溝、すなわち傾斜接触面９１、９２を
形成しており、軸受使用時におけるロ−ラのスキュ−
（揺れ）を防止し、円滑な回転運動を得る構成にしたも
のである（実開平１ー１５６３１４）。また、第３の従
来例として、ローラの保持用に樹脂製の円筒形や球形の
スペーサを用いたクロスロ−ラ軸受が提案されている。
なお、基本的な軸受の構成は第１の従来例と同じであ
る。図７および図８は第３の従来例の円筒形や球形のス
ペーサを用いたクロスロ−ラ軸受の側面展開図である。
内輪Ｖ形転送溝３および図示しない外輪Ｖ形転送溝の間
に挿入されたローラ６は円筒形スペーサ１０および球形
スペーサ１１と点あるいは一部が線で接触している（実
開平２ー７４６２５号公報）。なお、内輪、外輪および
ローラの材料に関しては、一般にＳＵＪ２やＳＵＳ４４
０Ｃなどの鉄系金属材料が用いられ、内輪、外輪および
ローラの全部または一部の摺動面には、二硫化モリブデ
ン（ＭｏＳ2 ）、二硫化タングステン（ＷＳ2）、銀
（Ａｇ）などの固体潤滑剤の薄膜が処理されたものが提
案されている（例えば、特開昭５５−５７７１７、特開
昭５８−１１３６２９、特開昭６１−５５４１０号公
報）。2. Description of the Related Art As a first conventional example of a cross roller bearing, a cross roller bearing is inserted between a V-shaped rolling groove having two circumferentially extending rolling surfaces provided on opposing surfaces of an inner ring and an outer ring. In order to hold a plurality of rollers, a device using a metal ring-shaped retainer has been proposed. In FIG.
(A) is a side view of a bearing using a ring-shaped cage, (b)
It is a perspective view of a ring-shaped retainer. The cross roller bearing basically includes an inner ring 1 and a split outer ring 2 opposed thereto, an inner ring V-shaped rolling groove 3 provided on the outer peripheral surface of the inner ring 1, and an inner ring V-shaped on the inner peripheral surface of the outer ring 2. An outer ring V-shaped rolling groove 4 of the same shape provided opposite to the rolling groove 3, an inner ring and an outer ring V-shaped rolling groove 3,
4 comprises a roller 6 for rolling. The ring-shaped retainer 8 is provided with an elliptical pocket hole 81 for rotatably holding the plurality of rollers 6 at an angle of 45 ° and allowing each roller 6 to pass through the pocket hole 81. Each of the divided pieces of the outer ring 2 is engaged with the outside thereof, and screws are screwed at several places. By doing so, the outer ring 2 and the inner ring 1
Each roller 6 rolls around an axis inclined at 45 ° to the center axis of the bearing. Further, as a second conventional example, a cross roller bearing using a resin spacer retainer for holding a roller has been proposed. The basic bearing arrangement of the inner ring, outer ring, and rollers is the same as that of the first conventional example. FIG. 6 is a plan view of a second conventional spacer retainer. In a cross roller bearing comprising a spacer retainer 9 interposed and held between a plurality of rollers 6, adjacent rollers 6 are rotatably fitted to the spacer retainer 9 on both left and right side surfaces thereof. Formed curved grooves, that is, inclined contact surfaces 91 and 92 are formed, and the skew of the roller when the bearing is used.
(Swaying) is prevented and a smooth rotational movement is obtained (actually disclosed in Japanese Utility Model Laid-Open No. 1-156314). Further, as a third conventional example, there has been proposed a cross roller bearing using a cylindrical or spherical spacer made of resin for holding a roller.
The basic configuration of the bearing is the same as that of the first conventional example. FIG. 7 and FIG. 8 are side development views of a third conventional cross roller bearing using a cylindrical or spherical spacer.
The roller 6 inserted between the inner ring V-shaped transfer groove 3 and the outer ring V-shaped transfer groove (not shown) is in point or partial line contact with the cylindrical spacer 10 and the spherical spacer 11 (Japanese Utility Model Laid-Open No. 2-74625). Gazette). The materials of the inner ring, outer ring and rollers are generally SUJ2 or SUS44.
An iron-based metal material such as 0C is used, and all or some of the sliding surfaces of the inner ring, the outer ring, and the roller are molybdenum disulfide (MoS 2 ), tungsten disulfide (WS 2 ), silver (Ag), and the like. A solid lubricant having a thin film treated has been proposed (for example, JP-A-55-57717, JP-A-58-113629, and JP-A-61-55410).
【０００３】[0003]
【発明が解決しようとする課題】ところが、これらの従
来技術のうち、リング状保持器を用いる第１の従来例は
は、ローラ６の保持性が良くてローラのスキューは起こ
りにくいが、ローラ６とリング状保持器８のポケット穴
８１とがこすれ、ロ−ラ表面の固体潤滑膜が早期に摩耗
して潤滑不良となり、ローラ６と内輪１あるいは外輪２
が焼き付いて軸受の寿命が短いという問題があった。ま
た、スペーサーリテーナを用いる第２の従来例は、ロー
ラ６の保持性が良くてローラのスキューは起こりにくい
が、ローラ６とスペサーリテーナ９とが面接触状態で滑
っていて、そこの摩擦力が大きくなるために、軸受の摩
擦トルクが大きいという問題があった。また、樹脂製の
円筒形や球形のスペーサローラを用いる第３の従来例
は、ローラ６は円筒形スペーサ１０および球形スペーサ
１１と点で接触しているため、ローラ６の保持性が悪く
てローラのスキューが起こり易く、軸受摩擦トルクの変
動が大きいという問題があった。そこで本発明は、ロ−
ラのスキュ−が起こり難く、軸受摩擦トルクおよびその
変動が小さく、そして軸受寿命が長い固体潤滑クロスロ
ーラ軸受を提供することを目的とするものである。However, of these prior arts, the first conventional example using a ring-shaped cage has a good roller 6 holding property and is unlikely to cause skew of the roller. And the pocket hole 81 of the ring-shaped retainer 8 are rubbed, and the solid lubricating film on the roller surface is worn out early, resulting in poor lubrication. The roller 6 and the inner ring 1 or the outer ring 2
However, there is a problem that the life of the bearing is short due to seizure. In the second conventional example using the spacer retainer, the roller 6 has good holding properties and the skew of the roller hardly occurs. However, the roller 6 and the special retainer 9 slide in a surface contact state, and the frictional force there is reduced. As a result, the friction torque of the bearing is large. Further, in the third conventional example using a cylindrical or spherical spacer roller made of resin, the roller 6 is in contact with the cylindrical spacer 10 and the spherical spacer 11 at a point, so that the roller 6 has poor holding properties and Skew is likely to occur, and there is a problem that fluctuations in bearing friction torque are large. Therefore, the present invention provides
An object of the present invention is to provide a solid lubricated cross roller bearing in which bearing skew hardly occurs, bearing friction torque and its fluctuation are small, and the bearing life is long.
【０００４】[0004]
【課題を解決するための手段】上記問題を解決するため
に、本発明は内輪と、外輪と、前記内輪と前記外輪のそ
れぞれ対向する面に設けた周方向に伸びるＶ形転走溝
と、前記二つのＶ形転走溝の間に挿入した複数個のロー
ラを備え、前記内輪と前記外輪の転走溝、および前記ロ
−ラの表面の一部または全部に固体潤滑材の被膜を形成
した固体潤滑クロスローラ軸受において、前記ローラ間
に、直径が前記ローラより僅かに小さく、円錐台形状と
円柱形状に成形されたものからなる自己潤滑性材料製の
疑似円柱状スペーサを挿設した構成にしたものである。
また、前記ローラと前記疑似円柱状スペーサの一個ずつ
を一組として、交互に傾斜方向を変えた構成にしたもの
である。また、前記ローラと前記疑似円柱状スペーサの
うち、少なくとも一方の部材の前記外輪側の端面を、前
記外輪のＶ形転走溝の中央の曲率半径と同一あるいはこ
れより僅かに小さな曲率半径の球面形状に形成したもの
である。また、前記ローラおよび前記疑似円柱状スペー
サの前記内輪側の端面のコーナ部を、それぞれの端面の
直径の約１０％の半径で面取りを施したものである。In order to solve the above-mentioned problems, the present invention provides an inner ring, an outer ring, and a V-shaped rolling groove extending in a circumferential direction provided on opposing surfaces of the inner ring and the outer ring. A plurality of rollers inserted between the two V-shaped rolling grooves are provided, and a coating of a solid lubricant is formed on the rolling grooves of the inner ring and the outer ring and on a part or all of the surface of the roller. In the solid lubricated cross roller bearing, a pseudo-cylindrical spacer made of a self-lubricating material having a diameter slightly smaller than that of the roller and formed into a truncated cone and a column is inserted between the rollers. It was made.
Further, the roller and the pseudo-cylindrical spacer are each set as one set, and the inclination direction is alternately changed. In addition, the outer ring side end surface of at least one of the roller and the pseudo columnar spacer has a spherical surface having a curvature radius equal to or slightly smaller than the radius of curvature of the center of the V-shaped rolling groove of the outer ring. It was formed into a shape. Further, the corners of the inner ring side end faces of the roller and the pseudo columnar spacer are chamfered with a radius of about 10% of the diameter of each end face.
【０００５】[0005]
【発明の実施の形態】以下、本発明の具体的実施例を図
に基づいて説明する。図１は本発明の実施例の一部を示
す側面展開図で、図２は図１のＡＡ’線に沿う側断面図
である。内輪１、外輪２、内輪Ｖ形転走溝３、外輪Ｖ形
転走溝４、ローラ６の基本的な構成は従来技術と同じで
ある。５は内輪Ｖ形転走溝３、外輪Ｖ形転走溝４および
ローラ６の表面にスパッタ法により付着させた二硫化モ
リブデンの固体潤滑膜である。７は直径がローラよりわ
ずかに小さく、円錐台状と円柱状の形状をした自己潤滑
性材料製の疑似円柱状スペーサである。なお、内輪１、
外輪２およびローラ６の材料は金属系およびセラミック
系材料を用いたもので、ローラ６と疑似円柱状スペーサ
７の一個ずつを一組として、交互に傾斜方向を変えてた
構成にしたものである。図３および図４は、それぞれロ
ーラ６、疑似円柱状スペーサ７の側面図である。ローラ
６および疑似円柱状スペーサ７の軸方向に位置する両端
面のうち、外輪Ｖ形転走溝４に対面する方の球面側端面
６２および７２は、外輪２の転走面の中央の曲率半径と
同一あるいはこれより僅かに小さな曲率半径を有する球
面に成形されており、そして、内輪Ｖ形転走溝３に対面
する方の平面状端面６１および７１のコーナ部６３およ
び７３は、それぞれローラ６および疑似円柱状スペーサ
７の平面状端面６１および７１の直径の約１０％の半径
の円弧で面取りが施されている。なお、図３のローラ６
と疑似円柱状スペーサ７のうち、少なくとも一方の部材
の外輪２側の端面を球面形状に成形した構成のものでも
良い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side elevational view showing a part of the embodiment of the present invention, and FIG. 2 is a side sectional view taken along the line AA 'in FIG. The basic configuration of the inner ring 1, the outer ring 2, the inner ring V-shaped rolling groove 3, the outer ring V-shaped rolling groove 4, and the roller 6 is the same as that of the prior art. Reference numeral 5 denotes a solid lubricating film of molybdenum disulfide adhered to the surfaces of the inner ring V-shaped rolling grooves 3, the outer ring V-shaped rolling grooves 4, and the rollers 6 by sputtering. Reference numeral 7 denotes a pseudo-cylindrical spacer made of a self-lubricating material having a diameter slightly smaller than that of the roller and having a truncated conical shape and a cylindrical shape. In addition, inner ring 1,
The outer ring 2 and the roller 6 are made of a metal or ceramic material. The roller 6 and the pseudo-cylindrical spacer 7 are each one set, and the inclination direction is alternately changed. . 3 and 4 are side views of the roller 6 and the pseudo columnar spacer 7, respectively. Of the end surfaces of the roller 6 and the pseudo columnar spacer 7 located in the axial direction, the spherical end surfaces 62 and 72 facing the outer ring V-shaped rolling groove 4 have a radius of curvature at the center of the rolling surface of the outer ring 2. Are formed into spherical surfaces having the same or slightly smaller radius of curvature, and the corner portions 63 and 73 of the planar end surfaces 61 and 71 facing the inner ring V-shaped rolling groove 3 are respectively provided with rollers 6. In addition, chamfering is performed with an arc having a radius of about 10% of the diameter of the planar end surfaces 61 and 71 of the pseudo columnar spacer 7. The roller 6 shown in FIG.
Of the pseudo columnar spacer 7, at least one of the members may have a configuration in which the end face on the outer ring 2 side is formed into a spherical shape.
【０００６】次に動作について説明する。内輪１と外輪
２が相対的に回転すると、ローラ６は軸受荷重を負担し
た状態で回転しながら内輪Ｖ形転走溝３、外輪Ｖ形転走
溝４内を移動する。このとき、固体潤滑膜５と自己潤滑
性材料製の疑似円柱状スペーサ７の固体潤滑作用によ
り、ローラ６は円滑に転動する。また、ローラ６および
疑似円柱状スペーサ７の球面側端面６２、７２は曲面の
中央部で外輪Ｖ形転走溝４とは点接触して、ローラ６お
よび疑似円柱状スペーサ７のエッジ部６４、７４が外輪
Ｖ形転走溝４と接触することがなくなるために、ローラ
６および疑似円柱状スペーサ７の球面側端面６２、７２
の局部的な摩耗あるいは外輪Ｖ形転走溝４表面の固体潤
滑膜５の過大な摩耗を防ぐことができる。また、ローラ
６は、内輪Ｖ形転走溝３と外輪Ｖ形転走溝４によって軸
受の軸方向の動きを、疑似円柱状スペーサ７の円錐面７
７によって軸受の円周方向の動きを規制される。そし
て、疑似円柱状スペーサ７は、内輪Ｖ形転走溝３と外輪
Ｖ形転走溝４によって軸受の軸方向の動きを、ローラ６
の円柱面６６で軸受の円周方向の動きを規制される。そ
の結果、ローラ６および疑似円柱状スペーサ７はスキュ
ーを起こしにくい。そして、自己潤滑性材料製の疑似円
柱状スペーサ７を使用するために、固体潤滑膜５が摩耗
しても、ローラ６は焼き付きを起こしにくい。Next, the operation will be described. When the inner ring 1 and the outer ring 2 rotate relative to each other, the roller 6 moves in the inner ring V-shaped rolling groove 3 and the outer ring V-shaped rolling groove 4 while rotating while bearing the bearing load. At this time, the roller 6 rolls smoothly due to the solid lubricating action of the solid lubricating film 5 and the pseudo-cylindrical spacer 7 made of a self-lubricating material. Further, the spherical end surfaces 62 and 72 of the roller 6 and the pseudo columnar spacer 7 are in point contact with the outer ring V-shaped rolling groove 4 at the center of the curved surface, and the edge portions 64 of the roller 6 and the pseudo columnar spacer 7 are formed. Since the outer ring 74 does not come into contact with the outer race V-shaped rolling groove 4, the spherical end faces 62, 72 of the roller 6 and the pseudo columnar spacer 7 are removed.
Or excessive wear of the solid lubricating film 5 on the surface of the outer ring V-shaped rolling groove 4 can be prevented. The roller 6 uses the inner ring V-shaped rolling groove 3 and the outer ring V-shaped rolling groove 4 to control the axial movement of the bearing, and the conical surface 7 of the pseudo columnar spacer 7.
7 regulates the circumferential movement of the bearing. The pseudo-cylindrical spacer 7 controls the axial movement of the bearing by the inner ring V-shaped rolling groove 3 and the outer ring V-shaped rolling groove 4 so that the roller 6
The movement of the bearing in the circumferential direction is restricted by the cylindrical surface 66. As a result, the roller 6 and the pseudo-cylindrical spacer 7 are unlikely to cause skew. In addition, since the pseudo-cylindrical spacer 7 made of a self-lubricating material is used, even if the solid lubricating film 5 is worn, the roller 6 is less likely to seize.
【０００７】上記手段によって、固体潤滑クロスローラ
軸受において、ローラとローラの間に、直径がローラよ
りわずかに小さく、円錐台状と円柱状の形状をした自己
潤滑性材料製の疑似円柱状スペーサを設置して、ローラ
と疑似円柱状スペーサのうち、少なくとも一方の部材の
外輪側の端面を外輪のＶ形転走溝の中央の曲率半径と同
一あるいはこれより僅かに小さな曲率半径の球面状に形
成し、かつ、ローラおよび疑似円柱状スペーサの内輪側
の端面のコーナ部をローラの直径の約１０％の半径で面
取りを施し、内輪と外輪の転走面およびローラの表面の
一部あるいは全部に二硫化モリブデン、二硫化タングス
テン、銀などの固体潤滑剤の薄膜を形成し、さらに、ロ
ーラと疑似円柱状スペーサは一個ずつを一組として、交
互に傾斜方向を変えて配列されているので、ローラおよ
び自己潤滑性材料製の疑似円柱状スペ−サがスキュ−す
ることがなくなるとともに、接触面の局部磨耗は少なく
なり、長時間に渡って焼き付きを生じることがなくな
る。さらに、ローラと疑似円柱状スペーサはその端面、
コーナ部に球面やＲ状の面取りを施した構成にしている
ので、それらのエッジ部が軌道溝とこすれたり、固体潤
滑膜を傷つけることがなく、その結果、軸受摩擦トルク
およびその変動が小さくなるとともに軸受寿命が長くな
る。By the above means, in the solid lubricated cross roller bearing, a pseudo-cylindrical spacer made of a self-lubricating material having a diameter slightly smaller than that of the roller and having a truncated cone shape and a cylindrical shape is provided between the rollers. The outer ring side end face of at least one of the roller and the pseudo columnar spacer is formed into a spherical shape having a radius of curvature equal to or slightly smaller than the radius of curvature of the center of the V-shaped rolling groove of the outer ring. In addition, a corner of the inner ring side end surface of the roller and the pseudo columnar spacer is chamfered with a radius of about 10% of the diameter of the roller, and a part or all of the rolling surface of the inner ring and the outer ring and the surface of the roller are chamfered. A thin film of a solid lubricant such as molybdenum disulfide, tungsten disulfide, silver, etc. is formed, and the roller and the pseudo-cylindrical spacer are paired one by one to change the tilt direction alternately. Arrangement, the rollers and the pseudo-cylindrical spacer made of a self-lubricating material are not skewed, the local wear of the contact surface is reduced, and the seizure is not caused for a long time. . Furthermore, the roller and the pseudo-cylindrical spacer have their end faces,
The corners are rounded or rounded so that the edges do not rub against the raceway grooves or damage the solid lubricating film. As a result, bearing friction torque and its fluctuations are reduced. At the same time, the bearing life is prolonged.
【０００８】[0008]
【発明の効果】以上述べたように、本発明によれば、固
体潤滑クロスローラ軸受において、複数のローラ間に、
直径がローラよりわずかに小さい、円錐台状と円柱状の
形状をした自己潤滑性材料製の疑似円柱状スペーサを設
けるとともに、ローラと疑似円柱状スうーサはその端
面、コーナ部に球面やＲ状の面取りを施した構成にして
いるので、ロ−ラのスキュ−が起こり難い、軸受摩擦ト
ルクおよびその変動が小さい、そして軸受寿命が長い、
高信頼性の固体潤滑クロスローラ軸受を得る効果があ
る。As described above, according to the present invention, in a solid lubricated cross roller bearing, between a plurality of rollers,
A pseudo-cylindrical spacer made of a self-lubricating material having a diameter slightly smaller than that of the roller and having a truncated conical shape and a cylindrical shape is provided, and the roller and the pseudo-cylindrical spacer are provided with spherical surfaces or R on their end surfaces and corners. The roller is less likely to skew, the bearing friction torque and its fluctuations are small, and the bearing life is long because of the chamfered configuration.
There is an effect of obtaining a highly reliable solid lubricated cross roller bearing.
【図１】 本発明の実施例の一部を示す側面展開図であ
る。FIG. 1 is a side elevational view showing a part of an embodiment of the present invention.
【図２】 図１のＡＡ’線に沿う側断面図である。FIG. 2 is a side sectional view taken along the line AA 'in FIG.
【図３】 ローラの側面図である。FIG. 3 is a side view of a roller.
【図４】 疑似円柱状スペーサの側面図である。FIG. 4 is a side view of the pseudo columnar spacer.
【図５】 （ａ）は第１の従来例を示すリング状保持器
を用いた場合の側面図、（ｂ）はリング状保持器の斜視
図である。FIG. 5A is a side view of a first conventional example in which a ring-shaped cage is used, and FIG. 5B is a perspective view of the ring-shaped cage.
【図６】 第２の従来例を示すスペーサリテーナを用い
た場合の平面図である。FIG. 6 is a plan view when a spacer retainer according to a second conventional example is used.
【図７】 第３の従来例を示す円筒形スペーサを用いた
場合の側面展開図である。FIG. 7 is a side elevational view when a cylindrical spacer according to a third conventional example is used.
【図８】 その他の第３の従来例を示す球形スペーサの
側面展開図である。FIG. 8 is a side elevational view of a spherical spacer showing another third conventional example.
１：内輪、２：外輪、３：内輪Ｖ形転走溝、４：外輪Ｖ
形転走溝、５：固体潤滑膜、６：ローラ、６１：平面状
端面、６２：球面状端面、６３：コーナ部、６４：エッ
ジ部、６５：面取り、６６：円筒面、７：疑似円柱状ス
ペーサ、７１：平面状端面、７２：球面状端面、７３：
コーナ部、７４：エッジ部、７５：面取り、７６：円柱
面，７７：円錐面，８：リング状保持器、８１：ポケッ
ト穴、９；スペーサリテーナ、９１、９２：傾斜接触
面、１０：円筒形スペ−サ、１１：球形スペーサ1: inner ring, 2: outer ring, 3: inner ring V-shaped rolling groove, 4: outer ring V
Shaped rolling groove, 5: solid lubricating film, 6: roller, 61: flat end face, 62: spherical end face, 63: corner, 64: edge, 65: chamfer, 66: cylindrical face, 7: pseudo circle Columnar spacer, 71: flat end face, 72: spherical end face, 73:
Corner, 74: edge, 75: chamfer, 76: cylindrical, 77: conical, 8: ring-shaped retainer, 81: pocket hole, 9: spacer retainer, 91, 92: inclined contact surface, 10: cylinder Shape spacer, 11: spherical spacer
Claims (4)
それぞれ対向する面に設けた周方向に伸びるＶ形転走溝
と、前記二つのＶ形転走溝の間に挿入した複数個のロー
ラを備え、前記内輪と前記外輪の転走溝、および前記ロ
−ラの表面の一部または全部に固体潤滑材の被膜を形成
した固体潤滑クロスローラ軸受において、 前記ローラ間に、直径が前記ローラより僅かに小さく、
円錐台形状と円柱形状に成形されたものからなる自己潤
滑性材料製の疑似円柱状スペーサを挿設したことを特徴
とする固体潤滑クロスローラ軸受。1. An inner ring, an outer ring, a V-shaped rolling groove extending in a circumferential direction provided on a surface of each of the inner ring and the outer ring, and a plurality of grooves inserted between the two V-shaped rolling grooves. A solid lubrication cross roller bearing in which a coating of a solid lubricant is formed on a part of or the entire surface of the roller, the rolling groove of the inner ring and the outer ring, and a diameter between the rollers. Slightly smaller than the roller,
A solid lubricated cross roller bearing comprising a pseudo-cylindrical spacer made of a self-lubricating material formed of a truncated cone and a cylinder.
一個ずつを一組として、交互に傾斜方向を変えてある請
求項１に記載の固体潤滑クロスローラ軸受。2. The solid lubricated cross roller bearing according to claim 1, wherein the roller and the pseudo-cylindrical spacer each constitute one set, and the inclination direction is alternately changed.
うち、少なくとも一方の部材の前記外輪側の端面を、前
記外輪のＶ形転走溝の中央の曲率半径と同一あるいはこ
れより僅かに小さな曲率半径の球面形状に形成した請求
項１または２に記載の固体潤滑クロスローラ軸受。3. A curvature of at least one of the roller and the pseudo-cylindrical spacer on an outer ring side is equal to or slightly smaller than a radius of curvature of a center of a V-shaped rolling groove of the outer ring. 3. The solid lubricated cross roller bearing according to claim 1, wherein the roller is formed in a spherical shape with a radius.
サの前記内輪側の端面のコーナ部を、それぞれの端面の
直径の約１０％の半径で面取りを施した請求項１から３
までの何れか１項に記載の固体潤滑クロスローラ軸受。4. A corner portion of the inner ring side end surface of the roller and the pseudo columnar spacer is chamfered with a radius of about 10% of a diameter of each end surface.
The solid lubricated cross roller bearing according to any one of the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26797396A JP3879108B2 (en) | 1996-09-17 | 1996-09-17 | Solid lubricated cross roller bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26797396A JP3879108B2 (en) | 1996-09-17 | 1996-09-17 | Solid lubricated cross roller bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1089364A true JPH1089364A (en) | 1998-04-07 |
| JP3879108B2 JP3879108B2 (en) | 2007-02-07 |
Family
ID=17452162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26797396A Expired - Fee Related JP3879108B2 (en) | 1996-09-17 | 1996-09-17 | Solid lubricated cross roller bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3879108B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006035947A1 (en) * | 2004-09-30 | 2006-04-06 | Thk Co., Ltd. | Rolling guide device |
| CN101818756A (en) * | 2010-04-20 | 2010-09-01 | 郑达铿 | High-precision rolling bearing of double-head cone |
| US7811002B2 (en) * | 2005-01-18 | 2010-10-12 | Nsk, Ltd. | Rolling device |
| CN107401553A (en) * | 2016-05-18 | 2017-11-28 | 上银科技股份有限公司 | Sized cross roller bearings with introns |
| CN107701582A (en) * | 2017-11-15 | 2018-02-16 | 营山县臻安机电科技研究所 | A kind of point contact type bearing |
-
1996
- 1996-09-17 JP JP26797396A patent/JP3879108B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006035947A1 (en) * | 2004-09-30 | 2006-04-06 | Thk Co., Ltd. | Rolling guide device |
| EP1803950A1 (en) * | 2004-09-30 | 2007-07-04 | Thk Co., Ltd. | Rolling guide device |
| JPWO2006035947A1 (en) * | 2004-09-30 | 2008-05-15 | Thk株式会社 | Rolling guide device |
| EP1803950A4 (en) * | 2004-09-30 | 2010-04-21 | Thk Co Ltd | Rolling guide device |
| US7811002B2 (en) * | 2005-01-18 | 2010-10-12 | Nsk, Ltd. | Rolling device |
| CN101818756A (en) * | 2010-04-20 | 2010-09-01 | 郑达铿 | High-precision rolling bearing of double-head cone |
| CN107401553A (en) * | 2016-05-18 | 2017-11-28 | 上银科技股份有限公司 | Sized cross roller bearings with introns |
| CN107401553B (en) * | 2016-05-18 | 2019-04-30 | 上银科技股份有限公司 | Sized cross roller bearings with introns |
| CN107701582A (en) * | 2017-11-15 | 2018-02-16 | 营山县臻安机电科技研究所 | A kind of point contact type bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3879108B2 (en) | 2007-02-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3529191B2 (en) | Method of manufacturing spherical roller bearing with cage and cage for spherical roller bearing with cage | |
| JP3477835B2 (en) | Spherical roller bearing with cage | |
| JPH10196660A (en) | Roller bearing | |
| JP2993647B2 (en) | Stud type track roller bearing | |
| JP3934277B2 (en) | Rolling bearing | |
| WO2001020183A1 (en) | Self-aligned roller bearing | |
| JPS62230407A (en) | Roller bearing device for working roll of rolling mill | |
| KR930702626A (en) | Gamma roller bearing | |
| US11149787B2 (en) | Thrust roller bearing | |
| JPH1089364A (en) | Solid lubricated cross roller bearing | |
| EP0939863A1 (en) | Roller bearing with means for giving the rollers a positive skew angle | |
| JP3480000B2 (en) | Rolling bearing | |
| JPH10252728A (en) | Axial direction rotation preventing mechanism for lipped thrust bearing ring | |
| JP2011085153A (en) | Rolling bearing | |
| JPH10141363A (en) | Solid lubricated cross roller bearing | |
| JP2535073B2 (en) | Slewing bearing | |
| US6896414B2 (en) | Ball roller | |
| JP2001336535A (en) | Cage for rolling bearing | |
| JP2004314203A (en) | Machine tool table device and rolling bearing for machine tool table device | |
| JPH1113751A (en) | Solid lubrication cross roller bearing | |
| JP2021148128A (en) | Cross roller bearing | |
| JP2004060866A (en) | Bearing for direct drive motor | |
| JPH06264933A (en) | Total roller type solid lubricating cross roller bearing | |
| JP2004176857A (en) | Cross roller bearing | |
| JPH0545803B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060216 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060508 |
|
| A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060707 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20061016 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20061029 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20101117 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20111117 Year of fee payment: 5 |
|
| LAPS | Cancellation because of no payment of annual fees |