JP2012229718A

JP2012229718A - Rolling bearing

Info

Publication number: JP2012229718A
Application number: JP2011097124A
Authority: JP
Inventors: Takeshi Iwawaki; 健岩脇; Akiyuki Suzuki; 章之鈴木
Original assignee: JTEKT Corp
Current assignee: JTEKT Corp
Priority date: 2011-04-25
Filing date: 2011-04-25
Publication date: 2012-11-22

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing increased in a load, the bearing which is durable in the axial direction and the radial direction.SOLUTION: In the rolling bearing 10 composed of an outer ring 11, an inner ring 20 arranged at the internal peripheral side of the outer ring 11, a roller 40 which is arranged between the outer ring 11 and the inner ring 20 and rolls with respect to them, and a cage 30 which rollably holds the roller 40, the roller 40 has a shape formed by being cut off at its both ends from a spherical shape, and also has a width of a level at which the roller can penetrate a clearance between the inner ring 20 and the outer ring 11 which are coaxially arranged, raceway surfaces 12, 22 circular in cross sections are formed at internal peripheries of the inner ring 20 and the outer ring 11, respectively, so that an axial line of the roller 40 can incline the roller 40 with respect to an axial line of the inner ring 20 from a right angle state to a parallel state, the cage 30 has a first annular body 31 and a second annular body 32 which are arranged at both ends of the roller 40, and the first annular body 31 and the second annular body 32 are connected to each other by the pin 35 which penetrates the roller 40.

Description

本発明は、ころをピンで回転可能に軸支した転がり軸受に関する。 The present invention relates to a rolling bearing in which a roller is rotatably supported by a pin.

転がり軸受の一種として、図４および図５に示すような転がり軸受がある（特許文献１）。このものは、外輪１００、内輪１１０、ころ１２０、保持器１３０を有し、保持器１３０には、ポケット１３１が円周方向に多数形成されている。この転がり軸受は、内輪１１０に対して保持器１３０を傾け、保持器１３０よりも外輪１００をさらに傾け、かかる状態で保持器１３０のポケット１３１にころ１２０を挿入し、保持器１３０を回して他のポケット１３１にころ１２０を挿入する動作を繰り返すことによって組み付けられる。内輪１１０と外輪１００間に最後のころ１２０を挿入できるようにするためには、最後のポケット１３１が見える位置まで内輪１１０に対し外輪１００を傾ける必要があり、このためには外輪１００の軌道面１０１に、ころ１２０の半径よりも大きめの円弧を形成する必要があった。 As a kind of rolling bearing, there is a rolling bearing as shown in FIGS. 4 and 5 (Patent Document 1). This has an outer ring 100, an inner ring 110, rollers 120, and a cage 130, and a number of pockets 131 are formed in the circumferential direction in the cage 130. In this rolling bearing, the cage 130 is tilted with respect to the inner ring 110, the outer ring 100 is further tilted than the cage 130, the roller 120 is inserted into the pocket 131 of the cage 130 in this state, and the cage 130 is rotated to It is assembled by repeating the operation of inserting the roller 120 into the pocket 131. In order to be able to insert the last roller 120 between the inner ring 110 and the outer ring 100, it is necessary to tilt the outer ring 100 with respect to the inner ring 110 to a position where the last pocket 131 can be seen. In 101, it was necessary to form an arc larger than the radius of the roller 120.

特開２００４−３０８７４２号公報JP 2004-308742 A

この結果、ころ１２０と外輪１００の軌道面１０１との接触面積が小さくなり、転がり軸受自体の軸方向に耐えられる荷重が小さい。また、保持器１３０は、ポケット１３１間に柱部１３２を有するため、ポケット１３１およびころ１２０の数に制限があり、転がり軸受自体の半径方向に耐えられる荷重をより大きくすることができない。本発明は、上述した問題点を解決するためになされたもので、その目的とするところは、軸方向および半径方向の耐えられる荷重を大きくした転がり軸受を提供する。 As a result, the contact area between the roller 120 and the raceway surface 101 of the outer ring 100 is reduced, and the load that can be endured in the axial direction of the rolling bearing itself is small. Further, since the cage 130 has the column portions 132 between the pockets 131, the number of the pockets 131 and the rollers 120 is limited, and the load that can be endured in the radial direction of the rolling bearing itself cannot be increased. The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rolling bearing having a large load that can be endured in the axial direction and the radial direction.

請求項１に記載の発明は、外輪と、この外輪の内周側に配置された内輪と、前記外輪および前記内輪間に配置されこれらに対し転動するころと、ころを転動可能に保持する保持器とからなる転がり軸受において、前記ころは、球形状から両側を平行に切り落とした形状を有し、しかも、同軸に配置した内輪と外輪間を挿通できる程度の幅を有し、前記内輪の外周および前記外輪の内周には、前記ころの軸線が前記内輪の軸線に対し、直角の状態から平行な状態へ前記ころを傾けることができるよう断面円弧状の軌道面がそれぞれ形成され、前記保持器は、ころの両側に配置される第１の環状体および第２の環状体を有し、前記ころを挿通するピンにより前記第１の環状体と第２の環状体を連結したものである。このような構成にすることにより、内輪に対して外輪を傾けなくても、内輪と外輪間の半径方向の空間よりころを挿入し、ころを外輪の軌道面および内輪の軌道面間に配置した状態で、ころを内輪の軸線と直角な状態から傾けることができる。外輪の軌道面および内輪の軌道面の断面円弧を、ころの半径とほぼ同じにすることができるので、軸方向の耐えられる荷重を大きくすることができる。さらに、保持器の第１の環状体および第２の環状体を、ころを挿通するピンで連結するため、ころを円周方向に多数設けることができ、軸方向および半径方向の耐えられる荷重をより大きくすることができる。 According to the first aspect of the present invention, an outer ring, an inner ring disposed on the inner peripheral side of the outer ring, a roller disposed between the outer ring and the inner ring and rolling with respect to these, and a roller are held rotatably. In the rolling bearing comprising the retainer, the roller has a shape obtained by cutting off both sides in parallel from a spherical shape, and has a width that allows the inner ring and the outer ring arranged coaxially to be inserted between the inner ring and the inner ring. The outer circumference of the outer ring and the inner circumference of the outer ring are each formed with a raceway surface having an arcuate cross section so that the roller can be tilted from a state perpendicular to the axis of the inner ring to a parallel state. The cage has a first annular body and a second annular body disposed on both sides of the roller, and the first annular body and the second annular body are connected by a pin that passes through the roller. It is. With such a configuration, even if the outer ring is not inclined with respect to the inner ring, the roller is inserted from the radial space between the inner ring and the outer ring, and the roller is disposed between the raceway surface of the outer ring and the raceway surface of the inner ring. In this state, the roller can be tilted from a state perpendicular to the axis of the inner ring. Since the cross-section arcs of the raceway surface of the outer ring and the raceway surface of the inner ring can be made substantially the same as the radius of the roller, the load that can be endured in the axial direction can be increased. In addition, since the first annular body and the second annular body of the cage are connected by pins through which the rollers are inserted, a large number of rollers can be provided in the circumferential direction, and a load that can be endured in the axial direction and the radial direction can be provided. Can be larger.

請求項２に記載の発明は、前記ピンの軸線が、前記内輪の軸線と平行にしたものである。このものは、ラジアル軸受として使用できる。 According to a second aspect of the present invention, the axis of the pin is parallel to the axis of the inner ring. This can be used as a radial bearing.

請求項３に記載の発明は、前記ピンの軸線が、前記内輪の軸線に対し傾斜したものである。このものは、アンギュラ軸受として使用できる。 According to a third aspect of the present invention, the axis of the pin is inclined with respect to the axis of the inner ring. This can be used as an angular bearing.

本発明によれば、外輪の軌道面および内輪の軌道面の断面円弧を、ころの半径とほぼ同じにすることができるので、軸方向の耐えられる荷重を高めることができる。さらに、保持器の第１の環状体および第２の環状体を、ころを挿通するピンで連結するため、ころを円周方向に多数設けることができ、軸方向および半径方向の耐えられる荷重をより大きくすることができる。 According to the present invention, the cross-sectional arcs of the raceway surface of the outer ring and the raceway surface of the inner ring can be made substantially the same as the radius of the roller, so that the load that can be endured in the axial direction can be increased. In addition, since the first annular body and the second annular body of the cage are connected by pins through which the rollers are inserted, a large number of rollers can be provided in the circumferential direction, and a load that can be endured in the axial direction and the radial direction can be provided. Can be larger.

本発明の実施形態における転がり軸受の全体正面図である。1 is an overall front view of a rolling bearing in an embodiment of the present invention. 本発明の実施形態における転がり軸受の縦断面図である。It is a longitudinal cross-sectional view of the rolling bearing in embodiment of this invention. 本発明の他の実施形態における転がり軸受の縦断面図である。It is a longitudinal cross-sectional view of the rolling bearing in other embodiment of this invention. 従来における転がり軸受の縦断面図である。It is a longitudinal cross-sectional view of the conventional rolling bearing. 従来における転がり軸受の保持器を円周方向に展開した展開図である。It is the expanded view which expand | deployed the retainer of the conventional rolling bearing in the circumferential direction.

本発明の一実施形態について、図１および図２を参酌しつつ説明する。図１は転がり軸受の全体正面であり、図２は転がり軸受の縦断面図である。 An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is an overall front view of a rolling bearing, and FIG. 2 is a longitudinal sectional view of the rolling bearing.

転がり軸受１０は、リング状の外輪１１と、外輪１１の内周側に配置されるリング状の内輪２０と、外輪１１と内輪２０間に配置されるリング状の保持器３０と、保持器３０に転動可能に保持される複数のころ４０とからなっている。前記ころ４０は、球形状から両側を平行に切り欠いた形状を有し、断面円弧状の転動面４１と両端面４２を有する。両端面４２は、左右同形状である。即ち、球形状から左右両側から同量切り欠いた形状を有する。ころ４０の転動軸線上には、両端面４２に開口する挿通穴４３が形成されている。 The rolling bearing 10 includes a ring-shaped outer ring 11, a ring-shaped inner ring 20 disposed on the inner peripheral side of the outer ring 11, a ring-shaped cage 30 disposed between the outer ring 11 and the inner ring 20, and a cage 30. And a plurality of rollers 40 held so as to be able to roll. The roller 40 has a shape in which both sides are cut out in parallel from a spherical shape, and has a rolling surface 41 and both end surfaces 42 having a circular arc cross section. Both end surfaces 42 have the same shape on the left and right. That is, it has a shape in which the same amount is cut out from the left and right sides from the spherical shape. On the rolling axis of the roller 40, an insertion hole 43 that opens to both end faces 42 is formed.

前記外輪１１の内周には、断面円弧状の外輪側軌道面１２が形成され、外輪側軌道面１２の両側に、軸線と平行に外輪側小径部１３が形成されている。外輪側小径部１３は、外輪側軌道面１２を中心に左右対称となるように形成されている。前記内輪２０の外周には、断面円弧状の内輪側軌道面２２が形成され、内輪側軌道面２２の両側に、軸線と平行に内輪側大径部２３が形成されている。内輪側大径部２３は、内輪側軌道面２２を中心に左右対称となるように形成されている。 An outer ring side raceway surface 12 having a circular arc cross section is formed on the inner circumference of the outer ring 11, and outer ring side small diameter portions 13 are formed on both sides of the outer ring side raceway surface 12 in parallel with the axis. The outer ring side small diameter portion 13 is formed so as to be symmetric with respect to the outer ring side raceway surface 12. An inner ring side raceway surface 22 having a circular arc cross section is formed on the outer periphery of the inner ring 20, and inner ring side large-diameter portions 23 are formed on both sides of the inner ring side raceway surface 22 in parallel with the axis. The inner ring side large-diameter portion 23 is formed so as to be symmetrical with respect to the inner ring side raceway surface 22.

両端面４２間の幅は、同心に配置した外輪側小径部１３および内輪側大径部２３間の半径方向の隙間よりも若干小さくなるように設定されている。つまり、同心に配置した外輪側小径部１３および内輪側大径部２３間の半径方向の隙間へ、図２の一点鎖線で示す状態のころ４０を挿入できる程度の両端面４２間の幅を有する。外輪側軌道面１２および内輪側軌道面２２は、ころ４０の転動面４１とほぼ同一の半径を有するか、若干大きめの半径を有する。つまり、ころ４０を外輪側軌道面１２および内輪側軌道面２２に対応する位置まで挿入した後、ころ４０の軸線が内輪２０の軸線に対し、直角の状態から平行な状態まで、ころ４０を傾けることができるような半径を、外輪側軌道面１２および内輪側軌道面２２が有する。 The width between both end faces 42 is set to be slightly smaller than the radial gap between the outer ring side small diameter portion 13 and the inner ring side large diameter portion 23 arranged concentrically. That is, the width between both end faces 42 is such that the roller 40 in the state indicated by the one-dot chain line in FIG. 2 can be inserted into the radial gap between the outer ring side small diameter part 13 and the inner ring side large diameter part 23 arranged concentrically. . The outer ring side raceway surface 12 and the inner ring side raceway surface 22 have substantially the same radius as the rolling surface 41 of the roller 40 or have a slightly larger radius. That is, after inserting the roller 40 to a position corresponding to the outer ring side raceway surface 12 and the inner ring side raceway surface 22, the roller 40 is tilted from a state in which the axis of the roller 40 is perpendicular to a direction parallel to the axis of the inner ring 20. The outer ring-side raceway surface 12 and the inner ring-side raceway surface 22 have such a radius that can be achieved.

前記保持器３０は、ころ４０の両側に配置される第１の環状体３１および第２の環状体３２と、第１の環状体３１および第２の環状体３２を互いに連結するピン３５およびナット３９とからなる。第１の環状体３１は、リング状でしかも断面四角形状を有し、ピン３５を挿通する第１の貫通穴３１ａが形成されている。同様に、第２の環状体３２は、リング状でしかも断面四角形状を有し、ピン３５を挿通する第２の貫通穴３２ａが形成されている。ピン３５は、ころ４０の挿通穴４３、第１の貫通穴３１ａおよび第２の貫通穴３２ａの挿通される軸部３７と、軸部３７の一端に形成された半径方向に拡張した頭部３６と、軸部３７の他端に形成されたおねじ３８とを有している。おねじ３８にはナット３９が噛合され、ピン３５の他端面およびナット３９の端面で、かつ、おねじ３５ａおよびナット３９のめねじにまたがる箇所に、ポンチ等が打ち込まれ、断面三角形状の凹み３５ｂが形成されている。この凹み３５ｂは、円周上、２から３箇所に形成され、これらの凹み３５ｂによってナット３９の緩みを防止している。 The retainer 30 includes a first annular body 31 and a second annular body 32 disposed on both sides of the roller 40, and a pin 35 and a nut that connect the first annular body 31 and the second annular body 32 to each other. 39. The first annular body 31 has a ring shape and a quadrangular cross section, and a first through hole 31 a through which the pin 35 is inserted is formed. Similarly, the second annular body 32 has a ring shape and a quadrangular cross section, and a second through hole 32 a through which the pin 35 is inserted is formed. The pin 35 includes an insertion hole 43 of the roller 40, a shaft portion 37 through which the first through hole 31a and the second through hole 32a are inserted, and a radially extending head portion 36 formed at one end of the shaft portion 37. And a male screw 38 formed at the other end of the shaft portion 37. A nut 39 is meshed with the male screw 38, and a punch or the like is driven into a portion extending between the other end surface of the pin 35 and the end surface of the nut 39, and over the male screw 35a and the female screw of the nut 39, and has a triangular cross section. 35b is formed. The recesses 35b are formed at two to three locations on the circumference, and the nuts 39 are prevented from loosening by these recesses 35b.

前記ころ４０は、金属製であり、鋳造または鍛造により転動面４１および両端面４２がおおまかな形状に形成され、切削等により転動面４１および両端面４２が所定に寸法に加工され、切削等により挿通穴４３が加工されるようになっている。 The roller 40 is made of metal, and the rolling surface 41 and both end surfaces 42 are formed in a rough shape by casting or forging, and the rolling surface 41 and both end surfaces 42 are processed into predetermined dimensions by cutting or the like. The insertion hole 43 is processed by the above.

前記第１の環状体３１および第２の環状体３２は、金属製であり、鋳造または鍛造により第１の環状体３１および第２の環状体３２がおおまかな形状に形成され、切削等により所定の外形寸法に加工され、切削等により挿通穴４３が加工されるようになっている。 The first annular body 31 and the second annular body 32 are made of metal, and the first annular body 31 and the second annular body 32 are formed into a rough shape by casting or forging, and are predetermined by cutting or the like. The insertion hole 43 is processed by cutting or the like.

続いて、転がり軸受１０の組付け動作について説明する。 Subsequently, the assembly operation of the rolling bearing 10 will be described.

内輪２０の外周側に外輪１１を同心に配置する。外輪側小径部１３および内輪側大径部２３間の半径方向の隙間へ、図２の一点鎖線で示す状態のころ４０を挿入し、外輪側軌道面１２および内輪側軌道面２２に対応する位置までころ４０を挿入した後、ころ４０の軸線が内輪２０の軸線に対し、直角の状態から平行な状態まで、ころ４０を傾ける。全てのころ４０を挿入し終わるまで、上述した動作を繰り返す。
全てのころ４０の挿入が完了すると、ころ４０の両端面４２の両側へ第１の環状体３１および第２の環状体３２を配置し、第２の貫通穴３２ａ、挿通穴４３、第１の貫通穴３１ａの順にピン３５を挿入する。全てのピン３５の挿入が完了すると、全てのピン３５にナット３９を噛合させ、ピン３５の他端面およびナット３９の端面で、かつ、おねじ３５ａおよびナット３９のめねじにまたがる箇所に、ポンチ等を円周上、２から３箇所に打ち込み、断面三角形状の凹み３５ｂを形成する。これらの凹み３５ｂによって、ナット３９の緩みが防止される。 The outer ring 11 is arranged concentrically on the outer peripheral side of the inner ring 20. A roller 40 in a state indicated by a one-dot chain line in FIG. 2 is inserted into a radial gap between the outer ring side small diameter portion 13 and the inner ring side large diameter portion 23, and positions corresponding to the outer ring side raceway surface 12 and the inner ring side raceway surface 22. After the roller 40 is inserted, the roller 40 is tilted from a state where the axis of the roller 40 is perpendicular to the axis of the inner ring 20 to a state parallel to the axis of the inner ring 20. The above-described operation is repeated until all the rollers 40 have been inserted.
When the insertion of all the rollers 40 is completed, the first annular body 31 and the second annular body 32 are arranged on both sides of the both end faces 42 of the roller 40, and the second through hole 32 a, the insertion hole 43, and the first The pins 35 are inserted in the order of the through holes 31a. When the insertion of all the pins 35 is completed, the nuts 39 are engaged with all the pins 35, and punches are made on the other end face of the pins 35 and the end face of the nut 39, and at a place spanning the male screw 35a and the female screw of the nut 39. Etc. are driven into 2 to 3 places on the circumference to form a recess 35b having a triangular cross section. These recesses 35b prevent the nut 39 from loosening.

こうして組み付けられた転がり軸受１０は、図略のハウジングと回転軸間に組み付けられ、回転軸を回転可能に軸支する。回転軸に作用する軸方向の力および半径方向の力は、転がり軸受１０を介してハウジングに作用する。転がり軸受１０に作用する軸方向および半径方向の力は、内輪側軌道面２２およびころ４０の転動面４１間で受け止められ、さらにころ４０の転動面４１および外輪側軌道面１２間で受け止められる。本発明は、外輪側軌道面１２および内輪側軌道面２２が、ころ４０の転動面４１とほぼ同一の半径を有するか、若干大きめの半径を有することにより、従来に比べて、ころ４０の転動面４１および外輪側軌道面１２間の接触する面積が大きくなり、転がり軸受１０自体の軸方向の耐えられる荷重がアップする。さらに、第１の環状体３１および第２の環状体３２をころ４０の挿通穴４３を通るピン３５で連結した構造であるので、ころ４０の数が従来に比べて多くなり、転がり軸受１０自体の軸方向および半径方向の耐えられる荷重がアップする。 The rolling bearing 10 assembled in this way is assembled between a housing (not shown) and a rotating shaft, and rotatably supports the rotating shaft. An axial force and a radial force acting on the rotating shaft act on the housing via the rolling bearing 10. The axial and radial forces acting on the rolling bearing 10 are received between the inner ring side raceway surface 22 and the rolling surface 41 of the roller 40, and further received between the rolling surface 41 of the roller 40 and the outer ring side raceway surface 12. It is done. According to the present invention, the outer ring side raceway surface 12 and the inner ring side raceway surface 22 have substantially the same radius as the rolling surface 41 of the roller 40 or a slightly larger radius. The contact area between the rolling surface 41 and the outer race side raceway surface 12 is increased, and the load that can be endured in the axial direction of the rolling bearing 10 itself is increased. Further, since the first annular body 31 and the second annular body 32 are connected by the pin 35 passing through the insertion hole 43 of the roller 40, the number of rollers 40 is increased as compared with the conventional one, and the rolling bearing 10 itself. The load that can be endured in the axial direction and the radial direction is increased.

上述した実施形態は、ラジアル軸受タイプの転がり軸受１０に本発明を適用した例について述べた。他の実施形態として、図３に示すようなアンギュラ軸受タイプの転がり軸受５０に本発明を適用しても良い。続いて、アンギュラ軸受タイプの転がり軸受５０について詳細に説明する。 In the above-described embodiment, the example in which the present invention is applied to the radial bearing type rolling bearing 10 has been described. As another embodiment, the present invention may be applied to an angular bearing type rolling bearing 50 as shown in FIG. Next, the angular bearing type rolling bearing 50 will be described in detail.

図３に示す転がり軸受５０は、リング状の外輪５１と、外輪５１の内周側に配置されるリング状の内輪６０と、外輪５１と内輪６０間に配置されるリング状の保持器７０と、保持器７０に保持される複数のころ８０とからなっている。前記ころ８０は、球形状から両側を平行に切り欠いた形状を有し、断面円弧状の転動面８１と両端面８２を有する。両端面８２は、左右同形状である。即ち、球形状から左右両側から同量切り欠いた形状を有する。ころ８０の転動軸線上には、両端面８２に開口する挿通穴８３が形成されている。 3 includes a ring-shaped outer ring 51, a ring-shaped inner ring 60 disposed on the inner peripheral side of the outer ring 51, and a ring-shaped cage 70 disposed between the outer ring 51 and the inner ring 60. , And a plurality of rollers 80 held by the cage 70. The roller 80 has a shape in which both sides are cut out in parallel from a spherical shape, and has a rolling surface 81 and both end surfaces 82 having a circular arc cross section. Both end faces 82 have the same shape on the left and right. That is, it has a shape in which the same amount is cut out from the left and right sides from the spherical shape. On the rolling axis of the roller 80, an insertion hole 83 that opens to both end faces 82 is formed.

前記外輪５１の内周には、断面円弧状の外輪側軌道面５２が形成され、外輪側軌道面５２の両側の一方に、軸線と平行に外輪側小径部５３が形成され、外輪側軌道面５２の両側の他方に、軸線と平行に外輪側大径部５４が形成されている。前記内輪６０の外周には、断面円弧状の内輪側軌道面６２が形成され、内輪側軌道面６２の両側の一方に、軸線と平行に内輪側小径部６３が形成され、内輪側軌道面６２の両側の他方に、軸線と平行に内輪側大径部６４が形成されている。 An outer ring side raceway surface 52 having a circular arc cross section is formed on the inner periphery of the outer ring 51, and an outer ring side small diameter portion 53 is formed on one of both sides of the outer ring side raceway surface 52 in parallel with the axis. An outer ring side large diameter portion 54 is formed on the other side of the both sides of 52 in parallel with the axis. An inner ring side raceway surface 62 having an arc-shaped cross section is formed on the outer periphery of the inner ring 60, and an inner ring side small diameter portion 63 is formed on one of both sides of the inner ring side raceway surface 62 in parallel with the axis. The inner ring side large-diameter portion 64 is formed in parallel to the axis on the other of the two sides.

両端面８２間の幅は、同心に配置した外輪側小径部５３および内輪側小径部６３間の半径方向の隙間よりも若干小さくなるように設定されている。つまり、同心に配置した外輪側小径部５３および内輪側小径部６３間の半径方向の隙間へ、図２の一点鎖線で示す状態のころ８０を挿入できる程度の両端面８２間の幅を有する。外輪側軌道面５および内輪側軌道面６２は、ころ８０の転動面８１とほぼ同一の半径を有するか、若干大きめの半径を有する。つまり、ころ８０を外輪側軌道面５２および内輪側軌道面６２に対応する位置まで挿入した後、ころ８０の軸線が内輪６０の軸線に対し、直角の状態から図３に示す傾斜した状態まで、ころ８０を傾けることができるような半径を、外輪側軌道面５２および内輪側軌道面６２が有する。 The width between both end faces 82 is set to be slightly smaller than the radial gap between the outer ring side small diameter part 53 and the inner ring side small diameter part 63 arranged concentrically. That is, the width between both end faces 82 is such that the roller 80 in the state indicated by the one-dot chain line in FIG. 2 can be inserted into the radial gap between the outer ring side small diameter part 53 and the inner ring side small diameter part 63 arranged concentrically. The outer ring side raceway surface 5 and the inner ring side raceway surface 62 have substantially the same radius as the rolling surface 81 of the roller 80 or have a slightly larger radius. That is, after inserting the roller 80 to a position corresponding to the outer ring side raceway surface 52 and the inner ring side raceway surface 62, from the state where the axis of the roller 80 is perpendicular to the axis of the inner ring 60 to the inclined state shown in FIG. The outer ring side raceway surface 52 and the inner ring side raceway surface 62 have such a radius that the roller 80 can be inclined.

前記保持器７０は、ころ８０の両側に配置される第１の環状体７１および第２の環状体７２と、第１の環状体７１および第２の環状体７２を互いに連結するピン７５とからなる。第１の環状体７１は、リング状でしかも断面四角形状を有し、ピン７５を挿通する第１の貫通穴７１ａが形成されている。同様に、第２の環状体７２は、リング状でしかも断面四角形状を有し、ピン７５を挿通する第２の貫通穴７２ａが形成されている。ピン７５は、ころ８０の挿通穴８３、第１の貫通穴７１ａおよび第２の貫通穴７２ａに挿通される軸部７７と、軸部７７の一端に形成された半径方向に拡張した頭部７６とを有している。ピン７５の他端面で、かつ、第１の貫通穴７１ａに近い箇所に、ポンチ等が打ち込まれ、断面三角形状の凹み７８が形成されている。この凹み３５ｂは、円周上、２から３箇所に形成され、これらの凹み７８によって第１の貫通穴７１ａの一部が変形し、ナット７１の抜けを防止している。 The retainer 70 includes a first annular body 71 and a second annular body 72 disposed on both sides of the roller 80, and a pin 75 that connects the first annular body 71 and the second annular body 72 to each other. Become. The first annular body 71 has a ring shape and a quadrangular cross section, and a first through hole 71 a through which the pin 75 is inserted is formed. Similarly, the second annular body 72 has a ring shape and a quadrangular cross section, and a second through hole 72 a through which the pin 75 is inserted is formed. The pin 75 includes an insertion hole 83 of the roller 80, a shaft portion 77 inserted through the first through hole 71a and the second through hole 72a, and a radially extending head portion 76 formed at one end of the shaft portion 77. And have. A punch or the like is driven into the other end surface of the pin 75 and close to the first through hole 71a to form a recess 78 having a triangular cross section. The recesses 35b are formed at two to three locations on the circumference, and the recesses 78 partially deform the first through hole 71a to prevent the nut 71 from coming off.

こうして組み付けられた転がり軸受５０は、図略のハウジングと回転軸間に組み付けられ、回転軸を回転可能に軸支する。回転軸に作用する軸方向の力および半径方向の力は、転がり軸受５０を介してハウジングに作用する。転がり軸受５０に作用する軸方向および半径方向の力は、内輪側軌道面６２およびころ８０の転動面８１間で受け止められ、さらにころ８０の転動面８１および外輪側軌道面５２間で受け止められる。本発明は、外輪側軌道面５２および内輪側軌道面６２が、ころ８０の転動面８１とほぼ同一の半径を有するか、若干大きめの半径を有することにより、従来に比べて、ころ８０の転動面８１および外輪側軌道面５２間の接触する面積が大きくなり、転がり軸受５０自体の軸方向の耐えられる荷重がアップする。さらに、第１の環状体７１および第２の環状体７２をころ８０の挿通穴８３を通るピン７５で連結した構造であるので、ころ８０の数が従来に比べて多くなり、転がり軸受５０自体の軸方向および半径方向の耐えられる荷重がアップする。 The rolling bearing 50 assembled in this way is assembled between a housing (not shown) and the rotating shaft, and rotatably supports the rotating shaft. An axial force and a radial force acting on the rotating shaft act on the housing via the rolling bearing 50. The axial and radial forces acting on the rolling bearing 50 are received between the inner ring side raceway surface 62 and the rolling surface 81 of the roller 80, and further received between the rolling surface 81 of the roller 80 and the outer ring side raceway surface 52. It is done. In the present invention, the outer ring side raceway surface 52 and the inner ring side raceway surface 62 have substantially the same radius as the rolling surface 81 of the roller 80 or a slightly larger radius. The contact area between the rolling surface 81 and the outer ring raceway surface 52 is increased, and the load that can be endured in the axial direction of the rolling bearing 50 itself is increased. Further, since the first annular body 71 and the second annular body 72 are connected by the pin 75 passing through the insertion hole 83 of the roller 80, the number of the rollers 80 is increased as compared with the conventional one, and the rolling bearing 50 itself. The load that can be endured in the axial direction and the radial direction is increased.

本発明はこうした実施形態に何等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、種々なる態様で実施し得ることは勿論である。 The present invention is not limited to these embodiments, and can of course be implemented in various modes without departing from the gist of the present invention.

１１：外輪、１２：外輪側軌道面（軌道面）、２０：内輪、２２：内輪側軌道面（軌道面）、３０：保持器、３１：第１の環状体、３２：第２の環状体、３５：ピン、４０：ころ DESCRIPTION OF SYMBOLS 11: Outer ring, 12: Outer ring side raceway surface (track surface), 20: Inner ring, 22: Inner ring side raceway surface (Raceway surface), 30: Cage, 31: First annular body, 32: Second annular body , 35: Pin, 40: Roll

Claims

外輪と、この外輪の内周側に配置された内輪と、前記外輪および前記内輪間に配置されこれらに対し転動するころと、ころを転動可能に保持する保持器とからなる転がり軸受において、前記ころは、球形状から両側を平行に切り落とした形状を有し、しかも、同軸に配置した内輪と外輪間を挿通できる程度の幅を有し、前記内輪の外周および前記外輪の内周には、前記ころの軸線が前記内輪の軸線に対し、直角の状態から平行な状態へ前記ころを傾けることができるよう断面円弧状の軌道面がそれぞれ形成され、前記保持器は、ころの両側に配置される第１の環状体および第２の環状体を有し、前記ころを挿通するピンにより前記第１の環状体と第２の環状体を連結したことを特徴とする転がり軸受。 In a rolling bearing comprising an outer ring, an inner ring disposed on the inner peripheral side of the outer ring, a roller disposed between the outer ring and the inner ring and rolling with respect to them, and a cage that holds the roller in a rollable manner. The roller has a shape obtained by cutting off both sides in parallel from a spherical shape, and has a width that allows the inner ring and the outer ring arranged coaxially to be inserted between the outer ring and the inner ring of the outer ring. Are formed with raceway surfaces each having an arcuate cross section so that the rollers can be tilted from a state perpendicular to the axis of the inner ring to a state parallel to the axis of the inner ring, and the cages are formed on both sides of the rollers. A rolling bearing having a first annular body and a second annular body to be arranged, wherein the first annular body and the second annular body are connected by a pin through which the roller is inserted.

前記ピンの軸線が、前記内輪の軸線と平行であることを特徴とする請求項１に記載の転がり軸受。 The rolling bearing according to claim 1, wherein an axis of the pin is parallel to an axis of the inner ring.

前記ピンの軸線が、前記内輪の軸線に対し傾斜していることを特徴とする請求項１に記載の転がり軸受。 The rolling bearing according to claim 1, wherein an axis of the pin is inclined with respect to an axis of the inner ring.