JP2013002513A - Rolling bearing mounting structure in rotating shaft device - Google Patents

Rolling bearing mounting structure in rotating shaft device Download PDF

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Publication number
JP2013002513A
JP2013002513A JP2011132785A JP2011132785A JP2013002513A JP 2013002513 A JP2013002513 A JP 2013002513A JP 2011132785 A JP2011132785 A JP 2011132785A JP 2011132785 A JP2011132785 A JP 2011132785A JP 2013002513 A JP2013002513 A JP 2013002513A
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Japan
Prior art keywords
taper
ring
pair
rotating shaft
tapers
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JP2011132785A
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Japanese (ja)
Inventor
Nao Inazaki
奈雄 稲▲崎▼
Fumihiro Furukawa
史洋 古川
Kunihiro Yamaguchi
晋弘 山口
Yoshitaka Waseda
義孝 早稲田
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JTEKT Corp
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JTEKT Corp
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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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

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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 prevent wear on the raceway surfaces of the inner and outer rings and on the rolling contact surfaces of rolling elements, and also, to prevent fretting and creep.SOLUTION: A pair of engaging tapers 24 is formed at the axial both ends of the inner periphery of an inner ring 20. A projecting part 73 projecting to the rolling bearing 10 side is formed on a rotating shaft 70. A first receiving taper 74 in surface contact with one of the pair of engaging tapers 24 is formed at the projecting part 73. An engaging groove 75 is formed in the rotating shaft 70 at a position corresponding to the other of the pair of engaging tapers 24, while an elastic ring 85 having radial elastic force is fitted into the engaging groove. A second receiving taper 86 in surface contact with the other of the pair of engaging tapers 24 is formed on the peripheral surface, on the side opposite the engaging groove 75, of the elastic ring 85. A moved taper 87 having an inclination gentler than that of the second receiving taper 86 is formed on the peripheral surface on the engaging groove 75 side of the elastic ring 85. A moving taper 76 in surface contact with the moved taper 87 is formed in the engaging groove 75. A resin-made absorber coating 24a is fixed to the pair of engaging tapers 24.

Description

本発明は、内輪、外輪、転動体とからなる転がり軸受を、回転軸およびハウジングの少なくともどちらか一方に取付けるための回転軸装置における転がり軸受の取付け構造に関する。   The present invention relates to a mounting structure for a rolling bearing in a rotating shaft device for mounting a rolling bearing including an inner ring, an outer ring, and a rolling element to at least one of a rotating shaft and a housing.

図３（特許文献１）に示すように、ハウジング１００に対し回転軸１１０を回転可能に軸支するためには、ハウジング１００および回転軸１１０間に内輪１２１、外輪１２２、転動体１２３とからなる転がり軸受１２０が使用される。この転がり軸受１２０の取付けは、ハウジング１００の内周に外輪１２２が半径方向にごく僅かな隙間を持って嵌合され、回転軸１１０の外周に内輪１２１が半径方向にごく僅かな隙間を持って嵌合され、外輪１２２が、ハウジング１００の段部１０１と、ハウジング１００の係合溝１０２に係合した一対のリング１４０、１４１とで軸方向に挟み込まれ、内輪１２１が、回転軸１１０の段部１１１と、回転軸１１０の係合溝１１２に係合したテーパ状の皿バネ１３０とで軸方向に挟み込まれることによってなされる。   As shown in FIG. 3 (Patent Document 1), in order to rotatably support the rotating shaft 110 with respect to the housing 100, an inner ring 121, an outer ring 122, and a rolling element 123 are provided between the housing 100 and the rotating shaft 110. A rolling bearing 120 is used. When the rolling bearing 120 is mounted, the outer ring 122 is fitted to the inner circumference of the housing 100 with a very small gap in the radial direction, and the inner ring 121 is fitted to the outer circumference of the rotary shaft 110 with a very little gap in the radial direction. The outer ring 122 is fitted between the stepped portion 101 of the housing 100 and the pair of rings 140 and 141 engaged with the engaging groove 102 of the housing 100 in the axial direction, and the inner ring 121 is stepped on the rotating shaft 110. This is achieved by being sandwiched in the axial direction between the portion 111 and the tapered disc spring 130 engaged with the engaging groove 112 of the rotating shaft 110.

さらにリング１４０は、内径方向に縮小しようとする弾性力を有し、リング１４１は外径方向に拡張しようとする弾性力を有し、リング１４０、１４１の互いに向かい合う面に、それぞれテーパ１４０ａ、１４１ａが形成されている。リング１４０、１４１自体の弾性力と、テーパ１４０ａ、１４１ａによって、外輪１２２をハウジング１００の段部１０１へ押し付ける軸方向の力が発生し、外輪１２２の端面とハウジング１００の段部１０１間の摩擦力によってハウジング１００に対する外輪１２２の軸方向および半径方向の移動を不能にしている。また、皿バネ１３０は内径方向にすぼまる弾性力を有し、皿バネ１３０の大径側の一端が内輪１２１の端面に当接することにより、内輪１２１を回転軸１１０の段部１１１へ押し付ける軸方向の力が発生し、内輪１２１の端面と回転軸１１０の段部１１１間の摩擦力によって内輪１２１に対する回転軸１１０の軸方向および半径方向の移動を不能にしている。   Further, the ring 140 has an elastic force that tends to shrink in the inner diameter direction, and the ring 141 has an elastic force that tries to expand in the outer diameter direction, and tapers 140a and 141a are formed on the surfaces of the rings 140 and 141 facing each other. Is formed. The axial force that presses the outer ring 122 against the step portion 101 of the housing 100 is generated by the elastic force of the rings 140 and 141 and the tapers 140a and 141a, and the frictional force between the end surface of the outer ring 122 and the step portion 101 of the housing 100 is generated. Accordingly, the outer ring 122 cannot be moved in the axial direction and the radial direction with respect to the housing 100. The disc spring 130 has an elastic force that squeezes in the inner diameter direction. One end on the large diameter side of the disc spring 130 contacts the end surface of the inner ring 121, thereby pressing the inner ring 121 against the step portion 111 of the rotating shaft 110. An axial force is generated, and the axial and radial movement of the rotating shaft 110 relative to the inner ring 121 is disabled by the frictional force between the end surface of the inner ring 121 and the step portion 111 of the rotating shaft 110.

実開昭６０−１０３７１３号公報Japanese Utility Model Publication No. 60-103713

ハウジング１００の内周に外輪１２２が半径方向にごく僅かな隙間を持って嵌合され、回転軸１１０の外周に内輪１２１が半径方向にごく僅かな隙間を持って嵌合されているため、ハウジング１００の内周の軸線に対し回転軸１１０の軸線が半径方向に若干ずれた位置に取付けられる。この結果、ハウジング１００の内周に対し回転軸１１０が振れ回り回転し、回転軸１１０の遠心力によって内輪１２１、外輪１２２の軌道面および転動体１２３の転動面が摩耗しやすい。   Since the outer ring 122 is fitted to the inner circumference of the housing 100 with a very small gap in the radial direction, and the inner ring 121 is fitted to the outer circumference of the rotating shaft 110 with a little gap in the radial direction, the housing The axis of the rotary shaft 110 is attached to a position slightly displaced in the radial direction with respect to the axis of the inner circumference of 100. As a result, the rotating shaft 110 swings and rotates with respect to the inner periphery of the housing 100, and the raceway surface of the inner ring 121 and the outer ring 122 and the rolling surface of the rolling element 123 are easily worn by the centrifugal force of the rotating shaft 110.

ハウジング１００の係合溝１０２および回転軸１１０の係合溝１１２に、リング１４０、１４１および皿バネ１３０に代えてＣリングを嵌め込んだものは、構造が簡単なため組み付けやすいメリットがある反面、軸方向に隙間があるため、外部からの振動により回転軸１１０が軸方向に繰り返し移動し、内輪１２１、外輪１２２の段部１１１、１０１側の端面にフレッチングが発生する。また、ハウジング１００の内周および外輪１２２間と、回転軸１１０の外周および内輪１２１間とにそれぞれ半径方向に隙間があるため、ハウジング１００に対し外輪１２２が回転し、内輪１２１に対し回転軸１１０が回転することによって、クリープが発生する。   In the case where the C-ring is fitted in the engagement groove 102 of the housing 100 and the engagement groove 112 of the rotating shaft 110 in place of the rings 140 and 141 and the disc spring 130, there is an advantage that the structure is simple and easy to assemble, Since there is a gap in the axial direction, the rotating shaft 110 repeatedly moves in the axial direction due to external vibration, and fretting occurs on the end surfaces of the inner ring 121 and the outer ring 122 on the side of the step portions 111 and 101. Further, since there is a gap in the radial direction between the inner periphery and the outer ring 122 of the housing 100 and between the outer periphery and the inner ring 121 of the rotation shaft 110, the outer ring 122 rotates with respect to the housing 100 and the rotation shaft 110 with respect to the inner ring 121. Creep is generated by rotating.

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、振れ回り回転を無くして内輪、外輪の軌道面および転動体の転動面の摩耗を無くすとともに、フレッチングおよびクリープの発生を無くした回転軸装置における転がり軸受の取付け構造を提供する。   The present invention has been made to solve the above-described problems, and the object of the present invention is to eliminate wear-out of the inner ring, the raceway surface of the outer ring and the rolling surface of the rolling element by eliminating the whirling rotation, Provided is a rolling bearing mounting structure in a rotary shaft device that eliminates occurrence of fretting and creep.

請求項１に記載の発明は、ハウジングに転がり軸受を介して回転軸を回転可能に軸支した回転軸装置において、内輪、外輪、転動体とからなる前記転がり軸受を、前記回転軸および前記ハウジングの少なくともどちらか一方に取付けるための転がり軸受の取付け構造であって、前記内輪の内周および前記外輪の外周の少なくともどちらか一方の軸方向両端に一対の係合テーパを形成し、前記回転軸および前記ハウジングの少なくともどちらか一方に前記転がり軸受側へ突出した突出部を形成し、この突出部に一対の係合テーパの一方に面接触する第１の受合テーパを形成し、一対の係合テーパの他方に対応する位置で前記回転軸および前記ハウジングの少なくともどちらか一方に係合溝を形成し、この係合溝に半径方向に弾性力を有する弾性リングを嵌め込み、この弾性リングの係合溝と反対側の周面に前記一対の係合テーパの他方に面接触する第２の受合テーパを形成し、前記弾性リングの係合溝側の周面に第２の受合テーパよりも緩やかな傾斜を有する被作動テーパを形成し、前記係合溝に前記被作動テーパに面接触する作動テーパを形成し、前記一対の係合テーパに樹脂製の吸収被膜を固着したものである。   According to a first aspect of the present invention, in the rotary shaft device in which the rotary shaft is rotatably supported on the housing via the rolling bearing, the rolling bearing including the inner ring, the outer ring, and the rolling element is connected to the rotary shaft and the housing. A rolling bearing mounting structure for mounting to at least one of the inner ring and the outer ring has an inner circumference and an outer circumference of the outer ring, and a pair of engagement tapers are formed at both axial ends, and the rotating shaft And at least one of the housings is formed with a protruding portion protruding toward the rolling bearing, and a first receiving taper that is in surface contact with one of the pair of engaging tapers is formed on the protruding portion. An engagement groove is formed in at least one of the rotating shaft and the housing at a position corresponding to the other of the combined taper, and the engagement groove has an elastic force in the radial direction. A second receiving taper that is in surface contact with the other of the pair of engagement tapers is formed on the peripheral surface of the elastic ring opposite to the engagement groove, and the elastic ring has a peripheral groove on the engagement groove side. An actuated taper having a gentler slope than the second receiving taper is formed on the surface, an actuating taper is formed in the engagement groove so as to make surface contact with the actuated taper, and the pair of engagement tapers are made of resin. The absorption film is fixed.

本発明によれば、ハウジングの内周の軸線に対し回転軸の軸線が同軸に配置されることにより、回転軸の振れ回りが無くなり、内輪、外輪の軌道面および転動体の転動面の摩耗が無くなる。さらに、ハウジングに対して外輪が軸方向および半径方向に移動不能に固定されるか、内輪に対して回転軸が軸方向および半径方向に移動不能に固定されることにより、フレッチングおよびクリープの発生を無くすことができる。またさらに、樹脂製の吸収被膜により振動が吸収されるとともに摩擦係数が増加し、フレッチングおよびクリープがもし仮に発生したとしても、フレッチングおよびクリープを低減できる。   According to the present invention, the axis of the rotating shaft is arranged coaxially with the inner peripheral axis of the housing, so that the rotating shaft does not run out, and the inner ring, the outer ring raceway surface, and the rolling element rolling surface wear. Disappears. Furthermore, the outer ring is fixed to the housing in an axially and radially immovable manner, or the rotating shaft is fixed to the inner ring in an axially and radially immovable manner to prevent fretting and creep. It can be lost. Furthermore, vibration is absorbed by the resin-made absorption coating and the coefficient of friction increases, so that fretting and creep can be reduced even if they occur.

本発明の実施形態における転がり軸受の取付け構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the attachment structure of the rolling bearing in embodiment of this invention. 本発明の実施形態における転がり軸受の取付け構造を示す図１のＡ矢視図である。It is A arrow directional view of FIG. 1 which shows the attachment structure of the rolling bearing in embodiment of this invention. 従来における転がり軸受の取付け構造を示す縦断面図である。It is a longitudinal cross-sectional view which shows the attachment structure of the conventional rolling bearing.

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は転がり軸受の取付け構造を示す縦断面図であり、図２は図１のＡ矢視図である。   An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal sectional view showing a mounting structure of a rolling bearing, and FIG. 2 is a view taken in the direction of arrow A in FIG.

回転軸装置６０は、ハウジング６１と、このハウジング６１に取り付けられる転がり軸受１０と、この転がり軸受１０を介して回転可能に軸支される回転軸７０とからなっている。転がり軸受は、転動体として玉を使った玉軸受１０である。玉軸受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に保持される複数の玉４０とからなっている。   The rotating shaft device 60 includes a housing 61, a rolling bearing 10 attached to the housing 61, and a rotating shaft 70 that is rotatably supported via the rolling bearing 10. The rolling bearing is a ball bearing 10 that uses balls as rolling elements. The ball 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 balls 40 held on the surface.

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１１の外周には、円筒状の被嵌合面１３が形成され、被嵌合面１３の軸方向の両端には、一対の係合テーパ１４が形成されている。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２０の内周には、円筒状の被嵌合面２３が形成され、被嵌合面２３の軸方向の両端には、一対の係合テーパ２４が形成されている。   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 a cylindrical fitted surface 13 is formed on the outer circumference of the outer ring 11. A pair of engagement tapers 14 are formed at both ends. 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 a cylindrical fitted surface 23 is formed on the inner circumference of the inner ring 20. A pair of engagement tapers 24 are formed at both ends.

前記保持器３０は円周方向に複数のポケット部３１を有し、各ポケット部３１に玉４０が回転可能に保持されている。前記玉４０は、金属製で、球形状を有し、外面が転動面となる。   The cage 30 has a plurality of pocket portions 31 in the circumferential direction, and a ball 40 is rotatably held in each pocket portion 31. The ball 40 is made of metal and has a spherical shape, and the outer surface is a rolling surface.

前記ハウジング６１には、回転軸７０の回転軸線と同軸に円筒状の内周面６２が形成され、この内周面６２は、外輪１１の被嵌合面１３が径方向に僅かな隙間を持って嵌合できるような内径を有する。内周面６２には転がり軸受１０側へ突出した突出部６３が形成され、この突出部６３には、一対の係合テーパ１４の一方に面接触する第１の受合テーパ６４が形成されている。また内周面６２には、一対の係合テーパ１４の他方に対応する位置に係合溝６５が形成され、この係合溝６５は突出部６３に向かって径が拡大する作動テーパ６６が形成されている。係合溝６５には、Ｃリング８０が嵌め込まれ、Ｃリング８０の外周には、作動テーパ６６に面接触する被作動テーパ８２が形成され、Ｃリング８０の内周には、一対の係合テーパ１４の他方に面接触する第２の受合テーパ８１が形成され、被作動テーパ８２は、第２の受合テーパ８１と比べて緩やかなテーパを有する。Ｃリング８０は、図１の状態よりもさらに外径方向に拡張しようとする弾性力を有し、円周上1箇所に切欠き８３を有する。   The housing 61 is formed with a cylindrical inner peripheral surface 62 coaxially with the rotation axis of the rotary shaft 70, and the inner peripheral surface 62 has a slight gap in the radial direction of the fitted surface 13 of the outer ring 11. It has an inner diameter that can be fitted. A projecting portion 63 projecting toward the rolling bearing 10 is formed on the inner peripheral surface 62, and a first receiving taper 64 that is in surface contact with one of the pair of engagement tapers 14 is formed on the projecting portion 63. Yes. An engagement groove 65 is formed on the inner peripheral surface 62 at a position corresponding to the other of the pair of engagement tapers 14, and the engagement groove 65 is formed with an operation taper 66 whose diameter increases toward the protrusion 63. Has been. A C ring 80 is fitted in the engagement groove 65, and an actuated taper 82 that is in surface contact with the actuation taper 66 is formed on the outer periphery of the C ring 80. A pair of engagements are formed on the inner periphery of the C ring 80. A second receiving taper 81 is formed in surface contact with the other side of the taper 14, and the actuated taper 82 has a gentler taper than the second receiving taper 81. The C ring 80 has an elastic force to expand further in the outer diameter direction than the state of FIG. 1 and has a notch 83 at one place on the circumference.

前記回転軸７０には、これの回転軸線と同軸に円筒状の外周面７２が形成され、この外周面７２は、内輪２０の被嵌合面２３が径方向に僅かな隙間を持って嵌合できるような外径を有する。外周面７２には転がり軸受１０側へ突出した突出部７３が形成され、この突出部７３には、一対の係合テーパ２４の一方に面接触する第１の受合テーパ７４が形成されている。また外周面７２には、一対の係合テーパ２４の他方に対応する位置に係合溝７５が形成され、この係合溝７５は突出部７３に向かって径が縮小する作動テーパ７６が形成されている。係合溝７５には、Ｃリング８５が嵌め込まれ、Ｃリング８５の外周には、作動テーパ７６に面接触する被作動テーパ８７が形成され、Ｃリング８５の内周には、一対の係合テーパ２４の他方に面接触する第２の受合テーパ８６が形成され、被作動テーパ８７は、第２の受合テーパ８６と比べて緩やかなテーパを有する。Ｃリング８５は、図１の状態よりもさらに内径方向に縮小しようとする弾性力を有し、円周上1箇所に切欠き８８を有する。   The rotary shaft 70 is formed with a cylindrical outer peripheral surface 72 coaxially with the rotation axis thereof, and the outer peripheral surface 72 is fitted to the fitted surface 23 of the inner ring 20 with a slight gap in the radial direction. It has an outer diameter that can be used. A projecting portion 73 projecting toward the rolling bearing 10 is formed on the outer peripheral surface 72, and a first receiving taper 74 that is in surface contact with one of the pair of engagement tapers 24 is formed on the projecting portion 73. . An engagement groove 75 is formed on the outer peripheral surface 72 at a position corresponding to the other of the pair of engagement tapers 24, and an operation taper 76 whose diameter decreases toward the protrusion 73 is formed in the engagement groove 75. ing. A C ring 85 is fitted in the engagement groove 75, and an actuated taper 87 is formed on the outer periphery of the C ring 85 so as to make surface contact with the operation taper 76. A pair of engagements are formed on the inner periphery of the C ring 85. A second receiving taper 86 is formed in surface contact with the other side of the taper 24, and the actuated taper 87 has a gentler taper than the second receiving taper 86. The C-ring 85 has an elastic force that tends to be further reduced in the inner diameter direction than the state of FIG. 1, and has a notch 88 at one place on the circumference.

前記一対の係合テーパ１４、２４には、樹脂製の吸収被膜１４ａ、２４ａが固着されている。吸収被膜１４ａ、２４ａは、例えばナイロン６６等の外輪１１および内輪２０よりも軟らかい材料が用いられる。吸収被膜１４ａ、２４ａは、粘着系の接着剤によって一対の係合テーパ１４、２４に貼り付けられる。前記粘着系の接着剤は、時間の経過とともに硬化するタイプのものが望ましい。   Resin-made absorption films 14a and 24a are fixed to the pair of engagement tapers 14 and 24, respectively. The absorbent coatings 14a and 24a are made of a material softer than the outer ring 11 and the inner ring 20 such as nylon 66, for example. The absorption coatings 14a and 24a are affixed to the pair of engagement tapers 14 and 24 by an adhesive adhesive. The pressure-sensitive adhesive is preferably of a type that cures over time.

続いて、回転軸装置６０へ玉軸受１０を取付ける動作について説明する。   Subsequently, an operation of attaching the ball bearing 10 to the rotary shaft device 60 will be described.

まず回転軸７０の外周面７２に、玉軸受１０の被嵌合面２３を嵌め込み、突起部７３の第１の受合テーパ７４に玉軸受１０の一対の係合テーパ２４の一方を面接触させる。係合溝７５にＣリング８５を嵌め込み、Ｃリング８５の第２の受合テーパ８６を玉軸受１０の一対の係合テーパ２４の他方に面接触させ、Ｃリング８５の被作動テーパ８７を回転軸７０の作動テーパ７６に面接触させる。Ｃリング８５は内径方向に縮小しようとする弾性力を有し、作動テーパ７６によってＣリング８５は突起部７３側へ移動し、一対の係合テーパ２４のテーパ作用によって、玉軸受１０は回転軸７０に対し同軸に取付けられる。   First, the fitted surface 23 of the ball bearing 10 is fitted into the outer peripheral surface 72 of the rotating shaft 70, and one of the pair of engagement tapers 24 of the ball bearing 10 is brought into surface contact with the first receiving taper 74 of the protrusion 73. . The C ring 85 is fitted into the engagement groove 75, the second receiving taper 86 of the C ring 85 is brought into surface contact with the other of the pair of engagement tapers 24 of the ball bearing 10, and the operated taper 87 of the C ring 85 is rotated. Surface contact is made with the operating taper 76 of the shaft 70. The C-ring 85 has an elastic force to reduce in the inner diameter direction, and the C-ring 85 is moved to the protrusion 73 side by the operation taper 76, and the ball bearing 10 is rotated by the taper action of the pair of engagement tapers 24. It is attached coaxially to 70.

続いてハウジング６１の内周面６２に、玉軸受１０の被嵌合面１３を嵌め込み、突起部６３の第１の受合テーパ６４に玉軸受１０の一対の係合テーパ１４の一方を面接触させる。係合溝６５にＣリング８０を嵌め込み、Ｃリング８０の第２の受合テーパ８１を玉軸受１０の一対の係合テーパ１４の他方に面接触させ、Ｃリング８０の被作動テーパ８２をハウジング６１の作動テーパ６６に面接触させる。Ｃリング８０は外径方向に拡張しようとする弾性力を有し、作動テーパ６６によってＣリング８０は突起部６３側へ移動し、一対の係合テーパ１４のテーパ作用によって、玉軸受１０はハウジング６１の内周面６２に対し同軸に取付けられる。   Subsequently, the fitted surface 13 of the ball bearing 10 is fitted into the inner peripheral surface 62 of the housing 61, and one of the pair of engaging tapers 14 of the ball bearing 10 is brought into surface contact with the first receiving taper 64 of the protrusion 63. Let The C-ring 80 is fitted into the engagement groove 65, the second receiving taper 81 of the C-ring 80 is brought into surface contact with the other of the pair of engagement tapers 14 of the ball bearing 10, and the operated taper 82 of the C-ring 80 is disposed in the housing. The operation taper 66 of 61 is brought into surface contact. The C ring 80 has an elastic force to expand in the outer diameter direction, and the C ring 80 is moved to the protrusion 63 side by the operation taper 66, and the ball bearing 10 is moved to the housing by the taper action of the pair of engagement tapers 14. It is attached coaxially to the inner peripheral surface 62 of 61.

このようにして取付けられた回転軸７０を回転させると、ハウジング６１の内周面６２の軸線に対し、回転軸７０の軸線が同軸となっているため、回転軸７０の振れ回りが無く、外輪１１の外輪側軌道面１２、内輪２０の内輪側軌道面２２、および玉４０の転動面の摩耗が無い。また外部から回転軸装置６０に振動が作用しても、ハウジング６１に対して外輪１１が、軸方向および半径方向に移動不能に固定され、内輪２０に対して回転軸７０が、軸方向および半径方向に移動不能に固定されているので、フレッチングおよびクリープの発生が無い。   When the rotating shaft 70 attached in this way is rotated, the axis of the rotating shaft 70 is coaxial with the axis of the inner peripheral surface 62 of the housing 61. 11, the outer race side raceway surface 12, the inner race 20 inner race side raceway surface 22, and the rolling surface of the ball 40 are not worn. Even if vibration is applied to the rotary shaft device 60 from the outside, the outer ring 11 is fixed to the housing 61 so as to be immovable in the axial direction and the radial direction, and the rotary shaft 70 is fixed to the inner ring 20 in the axial direction and the radial direction. Since it is fixed so that it cannot move in the direction, there is no occurrence of fretting and creep.

さらに、一対の係合テーパ１４、２４には、外輪１１および内輪２０よりも軟らかい樹脂製の吸収被膜１４ａ、２４ａが固着されているので、もし仮に回転軸７０が外部からの振動により軸方向に振動したとしても、前記振動を吸収してフレッチングを低減できる。また、樹脂製の吸収被膜１４ａ、２４ａにより摩擦係数が増加するので、もし仮にハウジング６１および外輪１１間、内輪２０および回転軸７０間で相対回転させる大きな回転トルクが発生したとしても、クリープを低減できる。   Furthermore, since the resin-made absorption coatings 14a and 24a, which are softer than the outer ring 11 and the inner ring 20, are fixed to the pair of engagement tapers 14 and 24, if the rotary shaft 70 is axially caused by vibrations from the outside. Even if it vibrates, the fretting can be reduced by absorbing the vibration. Moreover, since the friction coefficient is increased by the resin-made absorption coatings 14a and 24a, even if a large rotational torque that causes relative rotation between the housing 61 and the outer ring 11 and between the inner ring 20 and the rotating shaft 70 is generated, the creep is reduced. it can.

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.

上述した実施形態は、一対の係合テーパ１４、２４に吸収被膜１４ａ、２４ａを接着剤で貼り付けた例について述べたが、射出成形金型に外輪１１もしくは内輪２０をセットし、溶融した樹脂を射出することにより、一対の係合テーパ１４、２４に吸収被膜１４ａ、２４ａを固着しても良い。また、吸収被膜１４ａ、２４ａとして、ゴム系の材料を用い、ゴムの加硫接着により一対の係合テーパ１４、２４に吸収被膜１４ａ、２４ａを形成しても良い。   In the embodiment described above, an example in which the absorption coatings 14a and 24a are attached to the pair of engagement tapers 14 and 24 with an adhesive has been described. However, the outer ring 11 or the inner ring 20 is set in an injection mold, and the molten resin May be fixed to the pair of engagement tapers 14 and 24. Alternatively, a rubber-based material may be used as the absorption coatings 14a and 24a, and the absorption coatings 14a and 24a may be formed on the pair of engagement tapers 14 and 24 by vulcanization adhesion of rubber.

上述した実施形態は、一対の係合テーパを使用して、外輪１１および内輪２０をそれぞれハウジング６１および回転軸７０に対し同軸に固定した例について述べた。他の実施形態として、一対の係合テーパを使用して、内輪２０のみを回転軸７０に対し同軸に固定しても良い。   In the above-described embodiment, an example in which the outer ring 11 and the inner ring 20 are fixed coaxially to the housing 61 and the rotating shaft 70 using a pair of engagement tapers has been described. As another embodiment, only the inner ring 20 may be fixed coaxially with the rotation shaft 70 using a pair of engagement tapers.

上述した実施形態は、玉軸受１０に上述した取付け構造を適用した。他の実施形態として、円すいころ軸受、円筒ころ軸受等の他の軸受にも、上述した取付け構造を適用しても良い。   In the embodiment described above, the mounting structure described above is applied to the ball bearing 10. As another embodiment, the mounting structure described above may be applied to other bearings such as a tapered roller bearing and a cylindrical roller bearing.

１０：玉軸受（転がり軸受）、１１：外輪、１４：係合テーパ、１４ａ：吸収被膜、２０：内輪、２４：係合テーパ、２４ａ：吸収被膜、４０：玉（転動体）、６０：回転軸装置、６１：ハウジング、６３：突出部、６４：第１の受合テーパ、６５：係合溝、６６：作動テーパ、７０：回転軸、７３：突出部、７４：第１の受合テーパ、７５：係合溝、７６：作動テーパ、８０：Ｃリング（弾性リング）、８１：第２の受合テーパ、８２：被作動テーパ、８５：Ｃリング（弾性リング）、８６：第２の受合テーパ、８７：被作動テーパ 10: ball bearing (rolling bearing), 11: outer ring, 14: engagement taper, 14a: absorption coating, 20: inner ring, 24: engagement taper, 24a: absorption coating, 40: ball (rolling element), 60: rotation Shaft device, 61: housing, 63: protrusion, 64: first receiving taper, 65: engagement groove, 66: operating taper, 70: rotating shaft, 73: protrusion, 74: first receiving taper 75: engagement groove, 76: operating taper, 80: C ring (elastic ring), 81: second receiving taper, 82: actuated taper, 85: C ring (elastic ring), 86: second Acceptance taper, 87: Actuated taper

Claims (1)

ハウジングに転がり軸受を介して回転軸を回転可能に軸支した回転軸装置において、内輪、外輪、転動体とからなる前記転がり軸受を、前記回転軸および前記ハウジングの少なくともどちらか一方に取付けるための転がり軸受の取付け構造であって、前記内輪の内周および前記外輪の外周の少なくともどちらか一方の軸方向両端に一対の係合テーパを形成し、前記回転軸および前記ハウジングの少なくともどちらか一方に前記転がり軸受側へ突出した突出部を形成し、この突出部に一対の係合テーパの一方に面接触する第１の受合テーパを形成し、一対の係合テーパの他方に対応する位置で前記回転軸および前記ハウジングの少なくともどちらか一方に係合溝を形成し、この係合溝に半径方向に弾性力を有する弾性リングを嵌め込み、この弾性リングの係合溝と反対側の周面に前記一対の係合テーパの他方に面接触する第２の受合テーパを形成し、前記弾性リングの係合溝側の周面に第２の受合テーパよりも緩やかな傾斜を有する被作動テーパを形成し、前記係合溝に前記被作動テーパに面接触する作動テーパを形成し、前記一対の係合テーパに樹脂製の吸収被膜を固着したことを特徴とする回転軸装置における転がり軸受の取付け構造。   In a rotating shaft device in which a rotating shaft is rotatably supported by a housing via a rolling bearing, the rolling bearing including an inner ring, an outer ring, and a rolling element is attached to at least one of the rotating shaft and the housing. A mounting structure for a rolling bearing, wherein a pair of engagement tapers are formed at both axial ends of at least one of the inner circumference of the inner ring and the outer circumference of the outer ring, and at least one of the rotating shaft and the housing A protrusion protruding to the rolling bearing side is formed, and a first receiving taper that is in surface contact with one of the pair of engagement tapers is formed on the protrusion, and the protrusion is at a position corresponding to the other of the pair of engagement tapers. An engagement groove is formed in at least one of the rotating shaft and the housing, and an elastic ring having an elastic force in the radial direction is fitted into the engagement groove, and A second receiving taper that is in surface contact with the other of the pair of engaging tapers is formed on the peripheral surface of the ring opposite to the engaging groove, and a second receiving taper is formed on the peripheral surface of the elastic ring on the engaging groove side. An actuated taper having a gentler slope than the combined taper is formed, an actuating taper that is in surface contact with the actuated taper is formed in the engaging groove, and a resin-made absorption film is fixed to the pair of engaging tapers A structure for mounting a rolling bearing in a rotating shaft device.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015113849A (en) * 2013-12-09 2015-06-22 日本精工株式会社 Taper snap ring
JP2016142332A (en) * 2015-02-02 2016-08-08 住友重機械工業株式会社 Rotating device
WO2017170034A1 (en) * 2016-03-30 2017-10-05 Ntn株式会社 Rolling bearing device and plate-integrated rolling bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015113849A (en) * 2013-12-09 2015-06-22 日本精工株式会社 Taper snap ring
JP2016142332A (en) * 2015-02-02 2016-08-08 住友重機械工業株式会社 Rotating device
WO2017170034A1 (en) * 2016-03-30 2017-10-05 Ntn株式会社 Rolling bearing device and plate-integrated rolling bearing
CN109072981A (en) * 2016-03-30 2018-12-21 Ntn株式会社 Rolling bearing system and the one-piece type rolling bearing of plate

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