JP2013130209A - Roller bearing - Google Patents

Roller bearing Download PDF

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Publication number
JP2013130209A
JP2013130209A JP2011278350A JP2011278350A JP2013130209A JP 2013130209 A JP2013130209 A JP 2013130209A JP 2011278350 A JP2011278350 A JP 2011278350A JP 2011278350 A JP2011278350 A JP 2011278350A JP 2013130209 A JP2013130209 A JP 2013130209A
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Japan
Prior art keywords
roller
conical
outer ring
rollers
pressing member
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Pending
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JP2011278350A
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Japanese (ja)
Inventor
Wataru Takamizawa
渉 高見澤
Kenichi Hashimoto
健一 橋本
Takahiko Sato
崇彦 佐藤
Yoshiyuki Makihara
由行 牧原
Shigeo Ogura
茂男 小椋
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JTEKT Corp
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JTEKT Corp
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Priority to JP2011278350A priority Critical patent/JP2013130209A/en
Publication of JP2013130209A publication Critical patent/JP2013130209A/en
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    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • 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
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/466—Needle bearings with one row or needles comprising needle rollers and an outer ring, i.e. subunit without inner ring
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • F16C33/605—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings with a separate retaining member, e.g. flange, shoulder, guide ring, secured to a race ring, adjacent to the race surface, so as to abut the end of the rolling elements, e.g. rollers, or the cage
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • F16C43/08—Placing rolling bodies in cages or bearings by deforming the cages or the races
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/70—Diameters; Radii
    • F16C2240/80—Pitch circle diameters [PCD]
    • F16C2240/82—Degree of filling, i.e. sum of diameters of rolling elements in relation to PCD
    • F16C2240/84—Degree of filling, i.e. sum of diameters of rolling elements in relation to PCD with full complement of balls or rollers, i.e. sum of clearances less than diameter of one rolling element

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a roller bearing capable of preventing a roller from falling from an outer ring without using a roller of a special shape having small-diameter ends at both roller ends.SOLUTION: In this roller bearing 1 including an outer ring 2 formed into a cylindrical shape by pressing of a steel plate and including a raceway 21 at the axial center part, and a plurality of rollers 3 arranged on the raceway 21 of the outer ring 2, the outer ring 2 includes, at both ends, folded parts 22 folded to the radial inside toward end faces 32 of the rollers 3, and also includes pressing members 5 between at least one-side folded parts 22 and the end faces 32 of the plurality of rollers 3, and the plurality of rollers 3 are held in the outer ring 2 by pressing the end faces 32 of the rollers 3 in the axial direction by the pressing members 5. In the roller bearing, a conical inner surface 23 increased in diameter from a bearing outer side toward an axial roller side is formed in the inner diameter part of the folded part 22, and in each of the pressing members 5, a conical outer surface 52 in contact with the conical inner surface 23 is formed in the radial inner side of the conical inner surface 23.

Description

本発明は、針状ころ軸受等のころ軸受に係り、より詳しくは、保持器を備えず、かつ外輪は金属板をプレス加工することにより製作されるころ軸受に関する。   The present invention relates to a roller bearing such as a needle roller bearing, and more particularly to a roller bearing which is not provided with a cage and whose outer ring is manufactured by pressing a metal plate.

保持器を備えず、かつ外輪は金属板をプレス加工することにより製作されるころ軸受は通称総ころシェル形軸受と称され、通常のシェル形ころ軸受より、ころが多く組込まれることから、軸受の負荷容量が増加し、軸受寿命が増加する。従来のこのタイプのころ軸受は保持器を有しないため、外輪の両端部にころを保持する保持突起を有し、ころは両端部に小径端部を有する特殊な形状に形成されている。   Roller bearings that are not equipped with a cage and are manufactured by pressing a metal plate on the outer ring are commonly called full-roller shell bearings, and they have more rollers than ordinary shell roller bearings. The load capacity increases and the bearing life increases. Since this type of conventional roller bearing does not have a cage, it has holding projections for holding the rollers at both ends of the outer ring, and the rollers are formed in a special shape having small diameter ends at both ends.

外輪にころを組込む際には、外輪の両端部の保持突起の間から、ころの両端部の小径端部が当接しないように、ころを傾けて順に組付ける。最後のころだけは他のころよりも全長が短く（ころの両端部の小径端部間の全長が短い）形成されており、このころを外輪の保持突起の間から圧入して組付けている。（特許文献１参照）
この構造により、ころ軸受を装着する際に、ころが外輪から脱落ことを防止している。 When assembling the rollers into the outer ring, the rollers are inclined and assembled in order so that the small-diameter end portions at both ends of the rollers do not come into contact with each other from between the holding projections at both ends of the outer ring. Only the last roller has a shorter overall length than the other rollers (the overall length between the small-diameter end portions of both ends of the roller is shorter), and this roller is assembled by press-fitting between the holding projections of the outer ring. . (See Patent Document 1)
This structure prevents the roller from falling off the outer ring when the roller bearing is mounted.

特開平６−３０７４５６号公報JP-A-6-307456

しかしながら、ころを傾けて外輪に組付けるのは作業性が低下するばかりでなく、最後のころだけは他のころよりも短いころを用意する必要がある。また、最後のころの全長や外輪の保持突起の間隔のばらつきによっては、ころの圧入が困難になる場合もある。   However, inclining the rollers and assembling them to the outer ring not only reduces workability, but it is necessary to prepare rollers that are shorter than the other rollers only for the last roller. Further, depending on the variation in the total length of the last roller and the interval between the holding projections of the outer ring, it may be difficult to press-fit the rollers.

本発明はころ両端部に小径端部を有する特殊な形状のころを用いずに、外輪からころが脱落することがない、ころ軸受を提供することを目的としている。   An object of the present invention is to provide a roller bearing in which a roller does not fall off from an outer ring without using a roller having a special shape having small diameter ends at both ends of the roller.

上記の課題を解決するため、請求項１に係る発明の構成上の特徴は、鋼板のプレス加工により円筒形状に形成され、軸方向中央部に軌道を備えた外輪と、前記外輪の前記軌道に配置される複数のころとを備えたころ軸受であって、前記外輪は両端部に径方向内方に前記ころの端面に向けて折曲げられた折り返し部を備え、少なくと一方の前記折り返し部と、前記複数のころの端面との間に押付け部材を有し、前記複数のころは前記ころの端面を前記押付け部材によって、軸方向に押付けられることにより、前記外輪内に保持されていることである。   In order to solve the above-described problems, the structural feature of the invention according to claim 1 is that an outer ring formed in a cylindrical shape by pressing a steel plate and provided with a track in the center in the axial direction, and the track of the outer ring. A roller bearing including a plurality of rollers disposed, wherein the outer ring includes a folded portion that is bent radially inward toward an end surface of the roller at both ends, and at least one of the folded portions. And a pressing member between the end faces of the plurality of rollers, and the plurality of rollers are held in the outer ring by pressing the end faces of the rollers in the axial direction by the pressing member. It is.

本発明の構成によると、複数のころは両側の端面を軸方向に弾性的に押付けられることにより、前記外輪内に保持されている。すなわち従来の本形式のころ軸受に使用される両端部に小径端部を有する特殊な形状のころにくらべ安価な、両端面が平面である通常のころが組み込まれている。また、ころ両端を押付け部材の押付力で保持されているため、組立、取扱いにおいて、寸法誤差によるころの脱落、挿入困難が生じることがない。   According to the structure of this invention, the some roller is hold | maintained in the said outer ring | wheel by elastically pressing the end surface of both sides to an axial direction. In other words, ordinary rollers having both end surfaces that are flat are incorporated as compared with a roller having a special shape having small-diameter ends at both ends used in a conventional roller bearing of this type. In addition, since both ends of the roller are held by the pressing force of the pressing member, in the assembly and handling, the roller is not dropped or difficult to insert due to a dimensional error.

上記の課題を解決するため、請求項２に係る発明の構成上の特徴は、前記折り返し部の内径部には軸受外側から軸方向ころ側に向けて拡径する円錐状内面が形成され、前記円錐状内面の径方向内方に前記円錐状内面に接する円錐状外面が形成された押付け部材を有し、前記押付け部材の軸方向ころ側の端面が前記複数のころの端面に押付けられていることである。   In order to solve the above-mentioned problem, the structural feature of the invention according to claim 2 is that a conical inner surface that expands from the bearing outer side toward the axial roller side is formed on the inner diameter portion of the folded portion, A pressing member having a conical outer surface that is in contact with the conical inner surface is formed radially inward of the conical inner surface, and an end surface on the axial roller side of the pressing member is pressed against the end surfaces of the plurality of rollers. That is.

本発明の構成によると、前記ころを両側の前記押付け部材の間から前記外輪に内径側か挿入するとき、前記押付け部材は前記ころの面取り部の傾斜によって、前記外輪の前記円錐状内面を軸方向小径側に移動し、前記外輪の折り返し部は弾性的に拡径し、前記円錐リングは弾性的に縮径する。挿入が完了し、複数のころが所定の位置に配置されると、前記円錐リングは前記外輪の折り返し部の弾性的拡径による反発力と、前記押付け部材の弾性的縮径による反発力によって、前記ころの前記ころの端面を押付ける。このように、ころの挿入作業のみで、容易にころを前記外輪の所定の位置に保持することが可能である。   According to the configuration of the present invention, when the roller is inserted into the outer ring from between the pressing members on both sides, the pressing member pivots the conical inner surface of the outer ring by the inclination of the chamfered portion of the roller. The outer ring turns back elastically, and the conical ring elastically shrinks. When the insertion is completed and a plurality of rollers are arranged at predetermined positions, the conical ring is caused by a repulsive force due to elastic expansion of the folded portion of the outer ring and a repulsive force due to elastic contraction of the pressing member, The end surface of the roller of the roller is pressed. In this way, it is possible to easily hold the roller at a predetermined position of the outer ring only by inserting the roller.

上記の課題を解決するため、請求項３に係る発明の構成上の特徴は、前記押付け部材のころ側内径部に傾斜面を有することである。   In order to solve the above-described problem, a structural feature of the invention according to claim 3 is that the roller-side inner diameter portion of the pressing member has an inclined surface.

本発明の構成によれば、２個の前記円錐リングを外輪の両端部に装着した後、ころを前記外輪の内方より半径方向外方に前記２個の押付け部材の間に押付けて挿入する時、前記ころの面取り部と前記押付け部材の傾斜部が当接する。その状態で前記ころをさらに半径方向外方移動させると両押付け部材の軸方向間隔が広がり、前記ころを所定の位置に容易に装着できる。   According to the configuration of the present invention, after the two conical rings are mounted on both ends of the outer ring, the rollers are inserted between the two pressing members by pressing outwardly in the radial direction from the inner side of the outer ring. At this time, the chamfered portion of the roller contacts the inclined portion of the pressing member. When the roller is further moved radially outward in this state, the axial distance between the pressing members is widened, and the roller can be easily mounted at a predetermined position.

上記の課題を解決するため、請求項４に係る発明の構成上の特徴は、前記押付け部材は少なくとも1箇所の切割り部を有することである。   In order to solve the above problems, a structural feature of the invention according to claim 4 is that the pressing member has at least one slit portion.

本発明の構成によれば、前記ころを両端部の前記押付け部材の間の前記外輪に内径側か挿入し、前記押付け部材が前記外輪の前記円錐状内面を軸方向小径側に移動するとき、前記円錐リングは前記切割り部の幅に相当する径寸法は容易に縮径し、ころの組み込みがより容易になる。   According to the configuration of the present invention, when the roller is inserted into the outer ring between the pressing members at both ends or inserted into the inner ring side, and the pressing member moves the conical inner surface of the outer ring to the axial smaller diameter side, The diameter of the conical ring corresponding to the width of the cut portion is easily reduced, and the roller can be easily assembled.

上記の課題を解決するため、請求項５に係る発明の構成上の特徴は、前記押付け部材は樹脂等の弾性体で形成されていることである。   In order to solve the above problem, a structural feature of the invention according to claim 5 is that the pressing member is formed of an elastic body such as resin.

本発明のによれば、樹脂等の弾性体で形成された押付け部材は容易に変形できるため、楕円形に変形させて前記外輪の両側の前記折り返し部の間に装着することが可能である。また、樹脂等の弾性体は摩擦抵抗が小さく、ころ案内面のおける摩擦抵抗を軽減できる。さらに、金属にくらべ、軽量であり、前記軸受を組込む装置の軽量化に有効である。   According to the present invention, since the pressing member formed of an elastic body such as resin can be easily deformed, it can be deformed into an ellipse and mounted between the folded portions on both sides of the outer ring. In addition, an elastic body such as resin has a small frictional resistance, and can reduce the frictional resistance on the roller guide surface. Furthermore, it is lighter than metal and is effective in reducing the weight of a device incorporating the bearing.

本発明によれば、ころ両端部に小径端部を有する特殊な形状のころを用いずに、外輪からころが脱落することがない、ころ軸受を提供することができる。   According to the present invention, it is possible to provide a roller bearing in which a roller does not fall off from an outer ring without using a roller having a special shape having small diameter ends at both ends of the roller.

本発明の実施形態のころ軸受の断面図である。It is sectional drawing of the roller bearing of embodiment of this invention. 図１の主要部の拡大断面図である。It is an expanded sectional view of the principal part of FIG. 本発明の実施形態のころ軸受の円錐リング（押付け部材）の正面図である。It is a front view of the conical ring (pressing member) of the roller bearing of the embodiment of the present invention. 本発明の実施形態のころ軸受の作用を説明する説明図である。It is explanatory drawing explaining the effect | action of the roller bearing of embodiment of this invention.

この発明の実施の形態を、以下図面を参照して説明する。
各図の説明において、軸受の軸方向中心に向かう方向を軸方向内方、軸受の軸方向両端に向かう方向を軸方向外方と称する。 Embodiments of the present invention will be described below with reference to the drawings.
In the description of each drawing, the direction toward the axial center of the bearing is referred to as the axially inward direction, and the direction toward both axial ends of the bearing is referred to as the axially outward direction.

図１は、本発明の実施形態のころ軸受の断面図である。
図２は図１の主要部の右側半分の拡大断面図である。なお、本実施形態は左右対称である。 FIG. 1 is a cross-sectional view of a roller bearing according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the right half of the main part of FIG. Note that this embodiment is symmetrical.

図１および図２に示すように、ころ軸受１は、外輪２、ころ３、押付け部材としての円錐リング５を備える。
外輪２は鋼板をプレス加工することによって形成され、軸方向中央の内径部に軌道が形成され、両端部から径方向内方に湾曲し、さらに軸方向ころ側に連なる折り返し部２２が形成されている。折り返し部２２は軸方向端面側から軌道側に拡径し、内径面は円錐状内面２３となっている。 As shown in FIGS. 1 and 2, the roller bearing 1 includes an outer ring 2, a roller 3, and a conical ring 5 as a pressing member.
The outer ring 2 is formed by pressing a steel plate. A raceway is formed in the inner diameter portion at the center in the axial direction, the inner ring portion is curved inward in the radial direction from both end portions, and a turn-up portion 22 connected to the axial roller side is formed. Yes. The folded portion 22 has a diameter increasing from the axial end surface side to the track side, and the inner diameter surface is a conical inner surface 23.

外輪２は鋼板からなるパイプ材を用いて、次の工程で製造される。所定の長さに切断されたパイプ材は、両端の折り返し部２２に形成される部分の内径寸法を加工可能な肉厚に拡径される。次に、パイプ材の端部を半径方向内方に絞り込むと同時に先端部を軸方向内方に折込み、円筒形の折り返し部２２の原型が形成される。   The outer ring 2 is manufactured by the following process using a pipe material made of a steel plate. The pipe material cut into a predetermined length is expanded to have a workable thickness at the inner diameter dimension of the portion formed at the folded portion 22 at both ends. Next, the end portion of the pipe material is narrowed inward in the radial direction, and at the same time, the tip end portion is folded inward in the axial direction to form a prototype of the cylindrical folded portion 22.

次に折り返し部２２の原型の軸方向内方より、軌道側円錐形のロール掛け用治具を用いて、ロール掛けを行い、所定の円錐角の折り返し部２２が形成される。折り返し部２２の内径部の円錐状内面２３はロール掛けによって平滑な傾斜面に仕上げられる。折り返し部２２の成型の後、外輪２は熱処理によって所定の硬さに硬化される。   Next, rolling is performed from the inner side in the axial direction of the original shape of the folded portion 22 using a track-side conical roll hanging jig, and the folded portion 22 having a predetermined cone angle is formed. The conical inner surface 23 of the inner diameter portion of the folded portion 22 is finished into a smooth inclined surface by rolling. After molding the folded portion 22, the outer ring 2 is cured to a predetermined hardness by heat treatment.

ころ３は円筒形のいわゆる針状ころで円筒形の転動面３１と転動面３１の両側に転動面３１に対して直角な平面の端面３２を有している。   The roller 3 is a so-called needle roller of a cylindrical shape, and has a cylindrical rolling surface 31 and flat end surfaces 32 perpendicular to the rolling surface 31 on both sides of the rolling surface 31.

図３は本発明の実施形態のころ軸受の押付け部材としての円錐リング５の正面図である。円錐リング５はたとえば強化ポリアミド等の樹脂からなり、円環状に形成されており、図３に示すように円周上１箇所に切割り５６が形成されている。切割り５６の幅ｂは後述の円錐リング５の必要軸方向移動量に相当する軸方向移動による縮径が生じた場合の円周長さの減少量より大きい。   FIG. 3 is a front view of the conical ring 5 as a pressing member of the roller bearing according to the embodiment of the present invention. The conical ring 5 is made of, for example, a resin such as reinforced polyamide, and is formed in an annular shape. As shown in FIG. 3, a cut 56 is formed at one place on the circumference. The width b of the cut 56 is larger than the amount of decrease in the circumferential length when the diameter is reduced due to the axial movement corresponding to the necessary axial movement of the conical ring 5 described later.

円錐リング５の内径面５１は軸中心線に平行な円筒面で、外径部に外輪２の円錐内面２３と等しい円錐角で、内径面５１と同心の円錐状外面５２を有している。また、円錐状外面５１の大径側端部から径方向内方に向かって内径面との交差部まで、ころ案内面５３が形成されている。ころ案内面５３は軸中心線に垂直な平面で、ころ案内面５３と円錐状外面５２との交差部には面取り５５が形成されている。また、ころ案内面５３と内径面５１との交差部には面取り形状の傾斜面５４が形成されている。   An inner surface 51 of the conical ring 5 is a cylindrical surface parallel to the axial center line, and has a conical outer surface 52 concentric with the inner surface 51 at a conical angle equal to the conical inner surface 23 of the outer ring 2. A roller guide surface 53 is formed from the large-diameter end of the conical outer surface 51 to the intersection with the inner diameter surface inward in the radial direction. The roller guide surface 53 is a plane perpendicular to the axial center line, and a chamfer 55 is formed at the intersection of the roller guide surface 53 and the conical outer surface 52. Further, a chamfered inclined surface 54 is formed at the intersection between the roller guide surface 53 and the inner diameter surface 51.

ころ軸受１において、複数のころ３は、両端面３２が外輪２の両端に配置された円錐リング５のころ案内面５３に案内され、かつ円錐リング５から軸方向に作用する押付け力によって、転送面３１が外輪２の軌道２１に接した状態に保持されている。   In the roller bearing 1, the plurality of rollers 3 are transferred by the pressing force acting in the axial direction from the conical ring 5 while both end surfaces 32 are guided by the roller guide surfaces 53 of the conical ring 5 disposed at both ends of the outer ring 2. The surface 31 is held in contact with the track 21 of the outer ring 2.

ころ軸受１は次の工程で組立てられる。最初に一方の円錐リング５を径方向に圧縮し楕円形に変形し、外輪２の軌道２１の内方に挿入する。挿入した円錐リング５の圧縮を開放し真円に戻し、外輪２の内部で回転させ、外輪２の一方の円錐状内面２３と円錐リング５の円錐状外面５２が対峙する姿勢を保ち軸方向に外輪２の一方の円錐状内面２３と円錐リング５の円錐状外面５２とが密着するまで軸方向に移動させる。
次に他方の円錐リング５を一方の円錐リング５と同じ要領で他方の円錐状内面２３と円錐リング５の円錐状外面５２とが密着するまで軸方向に移動させる。この時の両円錐リング５のころ案内面５３の間隔ところ３の長さとの差の１／２が円錐リング５の必要軸方向移動量となる。 The roller bearing 1 is assembled in the following process. First, one of the conical rings 5 is compressed in the radial direction and deformed into an elliptical shape, and is inserted into the raceway 21 of the outer ring 2. The compression of the inserted conical ring 5 is released and returned to a perfect circle, and is rotated inside the outer ring 2, so that one conical inner surface 23 of the outer ring 2 and the conical outer surface 52 of the conical ring 5 are kept facing each other in the axial direction. The outer ring 2 is moved in the axial direction until one conical inner surface 23 of the outer ring 2 and the conical outer surface 52 of the conical ring 5 come into close contact with each other.
Next, the other conical ring 5 is moved in the axial direction in the same manner as the one conical ring 5 until the other conical inner surface 23 and the conical outer surface 52 of the conical ring 5 come into close contact with each other. At this time, 1/2 of the difference between the distance between the roller guide surfaces 53 of the two conical rings 5 and the length of 3 is the necessary axial movement amount of the conical rings 5.

図４は本発明の実施形態のころ軸受の作用を説明する説明図である。図４は両側の円錐リング５が外輪２の両側の折り返し部２２にそれぞれの円錐状外面５２を円錐状内面２３に密着して装着し、ころ３を半径方向内方より両円錐リングの間を外輪２の軌道部２２にむけて押付けて挿入する工程を示している。図４において実線は挿入開始時のころ３および円錐リング５を示し、破線は挿入完了時のころ３および円錐リング５を示している。   FIG. 4 is an explanatory view for explaining the operation of the roller bearing according to the embodiment of the present invention. In FIG. 4, the conical rings 5 on both sides are attached to the folded portions 22 on both sides of the outer ring 2 with the respective conical outer surfaces 52 closely attached to the conical inner surface 23, and the roller 3 is interposed between the conical rings from the radially inner side. The process of pushing and inserting toward the track part 22 of the outer ring 2 is shown. In FIG. 4, a solid line indicates the roller 3 and the conical ring 5 at the start of insertion, and a broken line indicates the roller 3 and the conical ring 5 at the time of completion of insertion.

ころ３を外輪２の内方より半径方向外方に両側の円錐リング５の間に押付けて挿入する時、ころ３の面取り部３３と円錐リング５の傾斜面５５が当接する。その状態でころ３をさらに円錐リング５の傾斜面５４に沿って半径方向外方に挿入すると、両円錐リング５の軸方向間隔が広がる。このとき円錐リング５は円錐状外面５２が外輪２の円錐状内面２３そって軸方向小径側に移動する為、弾性的に縮径し、その反発力が両円錐リング５からころ３に作用する。この時外輪２の折り返し部２２も若干弾性的に拡径するが、本実施形態においては円錐リング５の弾性的な縮径にくらべ、はるかに小さいので、以下円錐リング５の弾性的な縮径についてのみ説明する。   When the roller 3 is pressed and inserted between the conical rings 5 on both sides radially outward from the inner side of the outer ring 2, the chamfered portion 33 of the roller 3 and the inclined surface 55 of the conical ring 5 come into contact with each other. When the roller 3 is further inserted radially outward along the inclined surface 54 of the conical ring 5 in this state, the axial distance between the conical rings 5 is increased. At this time, the conical ring 5 is elastically contracted because the conical outer surface 52 moves along the conical inner surface 23 of the outer ring 2 toward the axially smaller diameter side, and the repulsive force acts on the rollers 3 from both the conical rings 5. . At this time, the folded portion 22 of the outer ring 2 is also slightly elastically expanded. However, in the present embodiment, it is much smaller than the elastic diameter reduction of the conical ring 5. Only will be described.

ころ３の面取り部３３が円錐リング５の傾斜面５４に沿って半径方向外方に移動し、ころ３の端面３２が円錐リング５のころ案内面に達し、円錐リング５の軸方向移動および縮径は終了する。この時の軸方向移動量が必要軸方向移動量等しい。   The chamfered portion 33 of the roller 3 moves radially outward along the inclined surface 54 of the conical ring 5, the end surface 32 of the roller 3 reaches the roller guide surface of the conical ring 5, and the conical ring 5 moves and contracts in the axial direction. The diameter ends. The amount of axial movement at this time is equal to the required amount of axial movement.

さらに、ころ３を円錐リング５のころ案内面に沿って半径方向外方に挿入すると、ころ３の転動面３１が外輪軌道２１に達し、ころ３の挿入は完了する。ころ軸受１に組込まれるすべてのころ３は同時に挿入できるが、分割して挿入しても良い。   Furthermore, when the roller 3 is inserted radially outward along the roller guide surface of the conical ring 5, the rolling surface 31 of the roller 3 reaches the outer ring raceway 21, and the insertion of the roller 3 is completed. Although all the rollers 3 incorporated in the roller bearing 1 can be inserted simultaneously, they may be inserted separately.

挿入が完了したころ軸受１において、円錐リング５が必要軸方向移動量によって弾性的に縮径し、その反発力が円錐リング５のころ案内面５３からころ３の端面３２へ押付け力として作用する。この押付け力によってころ３は外輪２の所定の位置に保持されている。
この反発力の大きさは円錐リングの円錐状外面５２、外輪の円錐状内面の円錐角、摩擦係数および、円錐リング５の弾性率と弾性変形量に拠る。円錐リングの円錐状外面５２、外輪の円錐状内面の円錐角は両円錐面の摩擦係数に関わり通常２０°から３５°の範囲に形成されている。 In the roller bearing 1 in which the insertion has been completed, the conical ring 5 is elastically reduced in diameter by the required amount of axial movement, and the repulsive force acts as a pressing force from the roller guide surface 53 of the conical ring 5 to the end surface 32 of the roller 3. . The roller 3 is held at a predetermined position of the outer ring 2 by this pressing force.
The magnitude of the repulsive force depends on the conical outer surface 52 of the conical ring, the cone angle of the conical inner surface of the outer ring, the friction coefficient, and the elastic modulus and elastic deformation of the conical ring 5. The conical outer surface 52 of the conical ring and the conical angle of the conical inner surface of the outer ring are usually formed in the range of 20 ° to 35 ° in relation to the friction coefficient of both conical surfaces.

円錐リング５は円周上１箇所に切割り５６を有するため、縮径に対する弾性率は切割りを有しない場合にくらべ格段に小さく、移動量のばらつきによる反発力への影響は小さい。また、必要最小限の反発力の設定が容易に行える。
このため両円錐リング５から、ころ３に作用する押付け力は安定し、過大な押付け力による挿入の不具合や、回転時の摩擦力の増加が生じることはない。 Since the conical ring 5 has the cut 56 at one place on the circumference, the elastic modulus with respect to the reduced diameter is much smaller than when there is no cut, and the influence on the repulsive force due to the variation in the moving amount is small. In addition, the minimum repulsive force can be easily set.
For this reason, the pressing force acting on the rollers 3 from both the conical rings 5 is stable, and there is no problem of insertion due to an excessive pressing force and an increase in frictional force during rotation.

上述のごとく、本実施形態のころ軸受によると、ころ両端部に小径端部を有する特殊な形状のころを用いる必要がなく、かつ外輪からころが脱落することはない。   As described above, according to the roller bearing of the present embodiment, it is not necessary to use a roller having a special shape having small diameter ends at both ends of the roller, and the roller does not fall off from the outer ring.

上述の実施形態において、円錐リング５はころ案内面と内径面の交差部に傾斜面が形成されているが、本発明において円錐リングは傾斜面を有せず、ころの面取りが円錐リングのころ案内面と内径面の交差部に当接する構成のころ軸受であっても良い。   In the above-described embodiment, the conical ring 5 is formed with an inclined surface at the intersection between the roller guide surface and the inner diameter surface. A roller bearing configured to abut on the intersection of the guide surface and the inner diameter surface may be used.

上述の実施形態において、押付け部材は外径部に円錐状外面５２を有する円錐リング５であるが、本発明において、押付け部材は外径部に円錐状外面を有しない形状で有っても良い。   In the above embodiment, the pressing member is the conical ring 5 having the conical outer surface 52 at the outer diameter portion. However, in the present invention, the pressing member may have a shape that does not have the conical outer surface at the outer diameter portion. .

上述の実施形態において、押付け部材としての円錐リング５は強化ポリアミド等の樹脂で形成されているが、本発明において、押付け部材の材質は鋼等の金属であっても良い。   In the above-described embodiment, the conical ring 5 as the pressing member is formed of a resin such as reinforced polyamide. However, in the present invention, the material of the pressing member may be a metal such as steel.

上述の実施形態において、押付け部材としての円錐リング５には円周上１箇所の切割りが形成されているが、本発明において押付け部材は切割りを有しない形状であっても良い。   In the above-described embodiment, the conical ring 5 as the pressing member is formed with one cut on the circumference. However, in the present invention, the pressing member may have a shape having no cut.

１ ‥ ころ軸受
２ ‥ 外輪
２１ ‥ 軌道
２２ ‥ 折り返し部
２３ ‥ 円錐状内面
３ ‥ ころ
３２ ‥ 端面
５ ‥ 円錐リング（押付け部材）
５２ ‥ 円錐状外面
５３ ‥ ころ案内面（ころ側端面）
５４ ‥ 傾斜面
５６ ‥ 切割り DESCRIPTION OF SYMBOLS 1 ... Roller bearing 2 ... Outer ring 21 ... Raceway 22 ... Turn-up part 23 ... Conical inner surface 3 ... Roller 32 ... End face 5 ... Conical ring (pressing member)
52 ... Conical outer surface 53 ... Roller guide surface (Roller side end face)
54 ... inclined surface 56 ... cutting

Claims (5)

鋼板のプレス加工により円筒形状に形成され、軸方向中央部に軌道を備えた外輪と、前記外輪の前記軌道に配置される複数のころとを備えたころ軸受であって、
前記外輪は両端部に径方向内方に前記ころの端面に向けて折曲げられた折り返し部を備え、少なくと一方の前記折り返し部と、前記複数のころの端面との間に押付け部材を有し、前記複数のころは前記ころの端面を前記押付け部材によって、軸方向に押付けられることにより、前記外輪内に保持されていることを特徴とするころ軸受。 A roller bearing that is formed into a cylindrical shape by press working of a steel plate and includes an outer ring that includes a raceway in a central portion in the axial direction, and a plurality of rollers that are disposed on the raceway of the outer ring,
The outer ring is provided with a folded portion that is bent radially inward toward the end surface of the roller at both ends, and has a pressing member between at least one of the folded portions and the end surfaces of the plurality of rollers. The plurality of rollers are held in the outer ring by the end surfaces of the rollers being pressed in the axial direction by the pressing member. 前記折り返し部の内径部には軸受外側から軸方向ころ側に向けて拡径する円錐状内面が形成され、
前記円錐状内面の径方向内方に、前記円錐状内面に接する円錐状外面が形成された押付け部材を有し、
前記押付け部材の軸方向ころ側の端面が前記複数のころの端面に押付けられていることを特徴とする請求項１に記載のころ軸受。 A conical inner surface that expands from the bearing outer side toward the axial roller side is formed on the inner diameter portion of the folded portion,
A pressing member having a conical outer surface in contact with the conical inner surface formed radially inward of the conical inner surface;
The roller bearing according to claim 1, wherein an end surface of the pressing member on an axial roller side is pressed against end surfaces of the plurality of rollers. 前記押付け部材のころ側内径部に面取りを有することを特徴とする請求項２に記載のころ軸受。   The roller bearing according to claim 2, wherein the roller-side inner diameter portion of the pressing member has a chamfer. 前記押付け部材は少なくとも1箇所の切割り部を有することを特徴とする請求項２または請求項３のいずれかに記載のころ軸受。   The roller bearing according to claim 2, wherein the pressing member has at least one slit portion. 前記押付け部材は樹脂等の弾性体で形成されていることを特徴とする請求項２から請求項４のいずれかに記載のころ軸受。   The roller bearing according to any one of claims 2 to 4, wherein the pressing member is formed of an elastic body such as resin.
JP2011278350A 2011-12-20 2011-12-20 Roller bearing Pending JP2013130209A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017108859A1 (en) * 2017-04-26 2018-10-31 Schaeffler Technologies AG & Co. KG needle roller bearings

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017108859A1 (en) * 2017-04-26 2018-10-31 Schaeffler Technologies AG & Co. KG needle roller bearings

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