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JP5807384B2 - Tapered roller bearing - Google Patents

Tapered roller bearing Download PDF

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Publication number
JP5807384B2
JP5807384B2 JP2011115605A JP2011115605A JP5807384B2 JP 5807384 B2 JP5807384 B2 JP 5807384B2 JP 2011115605 A JP2011115605 A JP 2011115605A JP 2011115605 A JP2011115605 A JP 2011115605A JP 5807384 B2 JP5807384 B2 JP 5807384B2
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Japan
Prior art keywords
diameter side
end surface
tapered roller
diameter
inner ring
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JP2011115605A
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Japanese (ja)
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JP2012241873A (en
Inventor
鈴木　章之
章之 鈴木
城　宏
宏 城
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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
    • 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
    • F16C19/364—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 tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4676—Details of individual pockets, e.g. shape or roller retaining means of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、外輪および内輪間に複数の円すいころと保持器を配置した円すいころ軸受に関する。   The present invention relates to a tapered roller bearing in which a plurality of tapered rollers and a cage are arranged between an outer ring and an inner ring.

図４および図５（特許文献１）に示すように、円すいころ軸受１００は、外輪１１０、内輪１２０、円すいころ１４０、保持器１３０とからなり、内輪１２０の大径側鍔部１２１の大径側内側端面１２２と、円すいころ１４０の大径側端面１４１とが滑り接触し、この箇所の焼付き防止のために、矢印１５０、１５１で示すように、内輪１２０の小径側鍔部１２３側から大径側鍔部１２１へ、潤滑油を積極的に流している。また、前記保持器１３０には、円すいころ１４０を転動可能に保持するポケット１３１が円周方向に等間隔に形成され、さらに各ポケット１３０の円周方向の両側に油対流用切欠き１３２が形成されているが、この油対流用切欠き１３２は、矢印１５０に示す、外輪１１０側、内輪１２０側、外輪１１０側の順に流れる流れと、矢印１５１に示す、内輪１２０側、外輪１１０側の順に流れる流れを引き起こすために設けたものであって、内輪１２０の大径側鍔部１２１の大径側内側端面１２２へ供給される潤滑油を増やすために設けたものでない。   As shown in FIGS. 4 and 5 (Patent Document 1), the tapered roller bearing 100 includes an outer ring 110, an inner ring 120, a tapered roller 140, and a cage 130, and the large diameter side flange 121 of the inner ring 120 has a large diameter. The side inner end surface 122 and the large-diameter side end surface 141 of the tapered roller 140 are in sliding contact with each other, and, as shown by arrows 150 and 151, from the small-diameter side flange 123 side of the inner ring 120, in order to prevent seizure at this location. Lubricating oil is actively flowing to the large-diameter side flange 121. Further, pockets 131 for holding the tapered rollers 140 to be rollable are formed in the retainer 130 at equal intervals in the circumferential direction, and further, oil convection notches 132 are provided on both sides of each pocket 130 in the circumferential direction. The oil convection notch 132 is formed on the outer ring 110 side, the inner ring 120 side, and the outer ring 110 side in the order indicated by an arrow 150, and on the inner ring 120 side and the outer ring 110 side indicated by an arrow 151. It is provided to cause a flow that flows in order, and is not provided to increase the lubricating oil supplied to the large diameter side inner end surface 122 of the large diameter side flange 121 of the inner ring 120.

特開平９−３２８５８号公報JP-A-9-32858

このため、自動車の発進時等で車速が低いときは、内輪１２０の小径側鍔部１２３側から大径側鍔部１２１へ流れる潤滑油の全体流量が少なく、内輪１２０の大径側鍔部１２１の大径側内側端面１２２と、円すいころ１４０の大径側端面１４１とが滑り接触する箇所に焼き付きが発生しやすい。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、その目的は、内輪１２０の大径側鍔部１２１の大径側内側端面１２２と、円すいころ１４０の大径側端面１４１とが滑り接触する箇所の焼き付きを防止する。   For this reason, when the vehicle speed is low, such as when the vehicle starts, the overall flow rate of the lubricating oil flowing from the small diameter side flange 123 side of the inner ring 120 to the large diameter side flange 121 is small, and the large diameter side flange 121 of the inner ring 120 is small. The large-diameter side inner end surface 122 and the large-diameter side end surface 141 of the tapered roller 140 are likely to be seized. The present invention has been made to solve the above-described problems. The purpose of the present invention is to provide a large-diameter inner end surface 122 of the large-diameter side flange 121 of the inner ring 120 and a large-diameter side end surface 141 of the tapered roller 140. Prevent seizure at the point of sliding contact.

請求項１に記載の発明は、外輪と、前記外輪の内周側に配置される内輪と、前記外輪および前記内輪間に配置され円周上等間隔に複数のポケットを有する保持器と、前記ポケットに配置される複数の円すいころとからなり、前記外輪の内周および前記内輪の外周に前記円すいころが転動する軌道面を形成し、前記内輪に前記軌道面の軸方向両側の一方に小径側鍔部を、他方に大径側鍔部を形成し、この大径側鍔部に前記円すいころが滑り接触する大径側内側端面を形成し、前記外輪および前記内輪間にできる空間が、前記内輪の小径側鍔部から大径側鍔部へ潤滑油が流れる油流路とされている円すいころ軸受において、前記保持器は、前記大径側内側端面と対応する位置まで半径方向に肉厚を有するとともに、前記大径側内側端面と向かい合わせで対向する大径側外側端面を有し、さらにこの大径側外側端面と反対側に小径側外側端面を有し、一方が前記小径側外側端面に開口し、他方が大径側外側端面に開口する油導入通路を前記保持器に設け、前記油導入通路を、複数のポケット間で、前記ポケットに開口しない位置に設けたものである。
The invention according to claim 1 is an outer ring, an inner ring disposed on an inner circumferential side of the outer ring, a cage disposed between the outer ring and the inner ring and having a plurality of pockets at equal intervals on the circumference, A plurality of tapered rollers arranged in a pocket, forming a raceway surface on which the tapered rollers roll on the inner circumference of the outer ring and the outer circumference of the inner ring, and on the inner ring on one side of the raceway surface in the axial direction. A small-diameter side collar is formed on the other side, and a large-diameter side collar is formed on the other side. A large-diameter side inner end surface is formed on the large-diameter side collar and the tapered roller is in sliding contact. In the tapered roller bearing in which the lubricating oil flows from the small-diameter side flange of the inner ring to the large-diameter side flange, the cage is radially extended to a position corresponding to the large-diameter inner end surface. It has a wall thickness and faces the inner end surface on the large diameter side. A large-diameter side outer end surface, and a small-diameter side outer end surface opposite to the large-diameter side outer end surface, one opening to the small-diameter side outer end surface, and the other opening to the large-diameter side outer end surface. An oil introduction passage that opens in the cage is provided in the cage, and the oil introduction passage is provided at a position that does not open in the pocket between a plurality of pockets .

この構成によって、内輪の小径側鍔部側にある潤滑油の一部が、油導入通路を経て内輪の大径側鍔部の大径側内側端面に供給され、この大径側端面へ供給される潤滑油が増えるので、内輪の大径側鍔部の大径側端面と、円すいころの大径側端面とが滑り接触する箇所の焼き付きを防止できる。さらに、油導入通路が、保持器の外径側あるいは内径側の円すいころが移動する空間に設けられていないので、油導入通路に潤滑油を流しても、攪拌抵抗が大幅に増えることがない。しかも、油導入通路を流れる潤滑油は、円すいころの外周に触れることないため、円すいころの回転抵抗が大幅に増えることがない。
With this configuration, a part of the lubricating oil on the small-diameter side flange portion of the inner ring is supplied to the large-diameter inner end surface of the large-diameter side flange portion of the inner ring through the oil introduction passage, and is supplied to the large-diameter side end surface. Therefore, seizure of a portion where the large-diameter side end surface of the large-diameter side flange of the inner ring and the large-diameter side end surface of the tapered roller are in sliding contact with each other can be prevented . Furthermore, since the oil introduction passage is not provided in the space in which the tapered roller on the outer diameter side or inner diameter side of the cage moves, even if lubricating oil flows through the oil introduction passage, the stirring resistance does not increase significantly. . Moreover, since the lubricating oil flowing through the oil introduction passage does not touch the outer periphery of the tapered roller, the rotational resistance of the tapered roller does not increase significantly.

本発明によれば、内輪の小径側鍔部側にある潤滑油の一部が、油導入通路を経て内輪の大径側鍔部の大径側内側端面に供給され、この大径側端面へ供給される潤滑油が増えるので、内輪の大径側鍔部の大径側端面と、円すいころの大径側端面とが滑り接触する箇所の焼き付きを防止できる。さらに、油導入通路が、保持器の外径側あるいは内径側の円すいころが移動する空間に設けられていないので、油導入通路に潤滑油を流しても、攪拌抵抗が大幅に増えることがない。しかも、油導入通路を流れる潤滑油は、円すいころの外周に触れることないため、円すいころの回転抵抗が大幅に増えることがない。
According to the present invention, a part of the lubricating oil on the small-diameter side flange portion side of the inner ring is supplied to the large-diameter inner end surface of the large-diameter side flange portion of the inner ring through the oil introduction passage. Since the supplied lubricating oil increases, it is possible to prevent seizure of the portion where the large diameter side end surface of the large diameter side collar portion of the inner ring is in sliding contact with the large diameter side end surface of the tapered roller. Furthermore, since the oil introduction passage is not provided in the space in which the tapered roller on the outer diameter side or inner diameter side of the cage moves, even if lubricating oil flows through the oil introduction passage, the stirring resistance does not increase significantly. . Moreover, since the lubricating oil flowing through the oil introduction passage does not touch the outer periphery of the tapered roller, the rotational resistance of the tapered roller does not increase significantly.

本発明の実施形態における円すいころ軸受の縦断面図である。It is a longitudinal cross-sectional view of the tapered roller bearing in the embodiment of the present invention. 本発明の実施形態における図１のＡ矢視図である。It is A arrow directional view of FIG. 1 in embodiment of this invention. 本発明の実施形態における図１のＢ方向から見た保持器の展開図である。It is an expanded view of the holder | retainer seen from the B direction of FIG. 1 in embodiment of this invention. 本発明の実施形態における図１のＣ−Ｃ線断面図である。It is CC sectional view taken on the line of FIG. 1 in embodiment of this invention. 従来における円すいころ軸受の縦断面図である。It is a longitudinal cross-sectional view of the conventional tapered roller bearing. 従来における保持器の外観図である。It is an external view of the conventional retainer.

本発明の一実施形態について、図１乃至図４を参酌しつつ説明する。図１は、円すいころ軸受の縦断面図であり、図２は、図１のＡ矢視図であり、図３は、図１のＢ方向から見た保持器の展開図であり、図４は、図１のＣ−Ｃ線断面図である。   An embodiment of the present invention will be described with reference to FIGS. 1 is a longitudinal sectional view of a tapered roller bearing, FIG. 2 is a view as seen from an arrow A in FIG. 1, and FIG. 3 is a development view of the cage as seen from the direction B in FIG. These are CC sectional view taken on the line of FIG.

図１乃至図２に示すように、円すいころ軸受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円すいころ４０とからなっている。外輪１１、内輪２０、円すいころ４０は、いずれも金属製の材料で構成され、特に鉄系の材料がよく使われる。保持器３０は、樹脂製の材料で構成され、特にナイロンがよく使われる。   As shown in FIGS. 1 and 2, the tapered roller bearing 10 is disposed between a ring-shaped outer ring 11, a ring-shaped inner ring 20 disposed on the inner peripheral side of the outer ring 11, and the outer ring 11 and the inner ring 20. It consists of a ring-shaped cage 30 and a plurality of tapered rollers 40 held by the cage 30. The outer ring 11, the inner ring 20, and the tapered roller 40 are all made of a metal material, and particularly iron-based materials are often used. The cage 30 is made of a resin material, and nylon is often used.

前記外輪１１の内周には、外輪１１の軸線に対して傾斜した外輪側軌道面１２が形成されている。前記内輪２０の外周には、内輪２０の軸線に対して傾斜した内輪側軌道面２２が形成されている。内輪側軌道面２２の軸方向両側の一方に外径方向へ突出した小径側鍔部２３が形成され、他方に外径方向へ突出した大径側鍔部２４が形成されている。小径側鍔部２３の円すいころ４０側の端面には、円すいころ４０の後述する小径側端面４２に滑り接触する小径側内側端面２３ａが形成されている。大径側鍔部２４の円すいころ４０側の端面には、円すいころ４０の後述する大径側端面４３に滑り接触する大径側内側端面２４ａが形成されている。   On the inner periphery of the outer ring 11, an outer ring side raceway surface 12 that is inclined with respect to the axis of the outer ring 11 is formed. On the outer periphery of the inner ring 20, an inner ring side raceway surface 22 that is inclined with respect to the axis of the inner ring 20 is formed. A small-diameter side flange 23 projecting in the outer diameter direction is formed on one of both axial sides of the inner ring side raceway surface 22, and a large-diameter side collar 24 projecting in the outer diameter direction is formed on the other side. A small-diameter inner end surface 23a is formed on the end surface on the tapered roller 40 side of the small-diameter side flange 23 so as to be in sliding contact with a small-diameter side end surface 42 described later of the tapered roller 40. A large-diameter inner end surface 24a that slides into contact with a large-diameter side end surface 43 (to be described later) of the tapered roller 40 is formed on the end surface of the large-diameter flange 24 on the tapered roller 40 side.

図１および図３に示すように、前記保持器３０には、円周方向に等間隔にポケット３１が形成され、各ポケット３１の円周方向両側に油導入通路３２が形成されている。また保持器３０は、外径側は外輪側軌道面１２の近傍まで、内径側は内輪側軌道面２２の近傍まで径方向に肉厚を有し、言い換えれば、大径側内側端面２４ａと対応する位置まで肉厚を有する。   As shown in FIGS. 1 and 3, pockets 31 are formed in the retainer 30 at equal intervals in the circumferential direction, and oil introduction passages 32 are formed on both sides of each pocket 31 in the circumferential direction. Further, the cage 30 has a thickness in the radial direction on the outer diameter side to the vicinity of the outer ring side raceway surface 12, and on the inner diameter side to the vicinity of the inner ring side raceway surface 22, in other words, corresponds to the large diameter side inner end face 24a. Thickness up to the position.

保持器３０の外輪側軌道面１２側には、第１の案内面３３、小径側外側端面３４、第２の案内面３５、第３の案内面３６が、小径側から大径側へ向かって順に形成されている。第１の案内面３３は、外輪側軌道面１２と平行に傾斜しており、小径側外側端面３４は、保持器３０の軸線に対し直角に近い角度で持って傾斜しており、第２の案内面３５は、外輪側軌道面１２に対して緩やかな傾斜を有し、第３の案内面３６は、保持器３０の軸線と平行な方向に延びている。   On the outer ring side raceway surface 12 side of the cage 30, a first guide surface 33, a small diameter side outer end surface 34, a second guide surface 35, and a third guide surface 36 are directed from the small diameter side toward the large diameter side. It is formed in order. The first guide surface 33 is inclined parallel to the outer ring side raceway surface 12, and the small-diameter side outer end surface 34 is inclined at an angle close to a right angle with respect to the axis of the cage 30, The guide surface 35 has a gentle inclination with respect to the outer ring side raceway surface 12, and the third guide surface 36 extends in a direction parallel to the axis of the cage 30.

第１の案内面３３は、外輪側軌道面１２に対し内径方向に離れた位置にあるので、外輪側軌道面１２、第１の案内面３３、小径側外側端面３４で囲まれた油導入空間３８が形成されている。第２の案内面３５は、外輪側軌道面１２に最も接近し、しかも外輪側軌道面１２に対し緩やかな傾斜を有するので、小径側外側端面３４側の外側軌道面１２および外輪側軌道面１２間に絞り３７が形成されている。油導入空間３８を設けることにより、潤滑油を捕捉しやすくなり、絞り３７を設けることにより、油導入通路３２を流れる潤滑油が増える。   Since the first guide surface 33 is located away from the outer ring side raceway surface 12 in the inner diameter direction, the oil introduction space surrounded by the outer ring side raceway surface 12, the first guide surface 33, and the small diameter side outer end surface 34. 38 is formed. Since the second guide surface 35 is closest to the outer ring side raceway surface 12 and has a gentle inclination with respect to the outer ring side raceway surface 12, the outer raceway surface 12 and the outer ring side raceway surface 12 on the small diameter side outer end surface 34 side. A diaphragm 37 is formed between them. Providing the oil introduction space 38 makes it easier to capture the lubricating oil, and providing the throttle 37 increases the amount of lubricating oil flowing through the oil introduction passage 32.

保持器３０の内輪側軌道面２２側には、第４の案内面６０、第５の案内面６１、大径側外側端面６２、第６の案内面６３が、小径側から大径側へ向かって順に形成されている。第４の案内面６０は、保持器３０の軸線とほぼ平行な方向に延びており、第５の案内面６１は、内輪側軌道面２２と平行な方向に延びており、大径側外側端面６２は、大径側内側端面２４ａと向かい合わせで対向しかつ大径側内側端面２４ａと平行な面を有し、第６の案内面６３は、保持器３０の軸線と平行な方向に延びている。   On the inner ring side raceway surface 22 side of the cage 30, a fourth guide surface 60, a fifth guide surface 61, a large-diameter side outer end surface 62, and a sixth guide surface 63 are directed from the small-diameter side to the large-diameter side. Are formed in order. The fourth guide surface 60 extends in a direction substantially parallel to the axis of the cage 30, and the fifth guide surface 61 extends in a direction parallel to the inner ring side raceway surface 22, and has a large-diameter side outer end surface. 62 has a surface facing and facing the large-diameter inner end surface 24a and parallel to the large-diameter inner end surface 24a, and the sixth guide surface 63 extends in a direction parallel to the axis of the cage 30. Yes.

外輪１１および内輪２０間の空間が、小径側鍔部２３から大径側鍔部２４へ潤滑油が流れる油流路となっている。つまり、外輪１１および保持器３０間の空間も油流路の一つであり、保持器３０および内輪２０間の空間も油流路の一つである。油導入通路３２は、一方が小径側外側端面３４に開口し、他方が大径側外側端面６２に開口している。また油導入通路３２は、図４に示すように、断面略四角形状の溝であり、ポケット３１に開口する側は、円すいころ４０で塞がれている。図１および図３に示すように、油導入通路３２は、円すいころ４０に沿って形成されており、図１で見る限り、油導入通路３２は、保持器３０の軸線とほぼ平行に形成されているように見えるが、油導入通路３２は、円すいころ４０の外輪１１側から円すいころ４０の内輪２０側に渡って形成されているので、図３に示すように、油導入通路３２は、円弧状に形成されている。   The space between the outer ring 11 and the inner ring 20 serves as an oil passage through which lubricating oil flows from the small diameter side flange 23 to the large diameter side flange 24. That is, the space between the outer ring 11 and the cage 30 is also one of the oil channels, and the space between the cage 30 and the inner ring 20 is also one of the oil channels. One of the oil introduction passages 32 opens in the small-diameter side outer end surface 34, and the other opens in the large-diameter side outer end surface 62. Further, as shown in FIG. 4, the oil introduction passage 32 is a groove having a substantially rectangular cross section, and the side opened to the pocket 31 is closed by a tapered roller 40. As shown in FIGS. 1 and 3, the oil introduction passage 32 is formed along the tapered roller 40. As seen in FIG. 1, the oil introduction passage 32 is formed substantially parallel to the axis of the cage 30. However, since the oil introduction passage 32 is formed from the outer ring 11 side of the tapered roller 40 to the inner ring 20 side of the tapered roller 40, as shown in FIG. It is formed in an arc shape.

図３および図４に示すように、ポケット３１は、円すいころ４０に沿って断面円弧状に形成されている。ポケット３１の外輪１１側の入口は、円すいころ４０の最大外形よりも小さいので、内輪２０に保持器３０を遊嵌した状態で、ポケット３１の入口を変形させて保持器３０の外周側よりポケット３１に円すいころ４０が挿入される。保持器３０は、射出成形等により製作される。   As shown in FIGS. 3 and 4, the pocket 31 is formed in a circular arc shape along the tapered roller 40. Since the entrance on the outer ring 11 side of the pocket 31 is smaller than the maximum outer shape of the tapered roller 40, the pocket 31 is deformed from the outer periphery side of the cage 30 by deforming the entrance of the pocket 31 with the cage 30 loosely fitted to the inner ring 20. A tapered roller 40 is inserted into 31. The cage 30 is manufactured by injection molding or the like.

前記円すいころ４０は、円すい形状から頂部を除去した形状を有するもので、前記外輪側軌道面１２と前記内輪側軌道面２２上を転動する転動面４１と、小径側の端面に形成された小径側端面４２と、大径側の端面に形成された大径側端面４３を有する。   The tapered roller 40 has a shape obtained by removing the top from the conical shape, and is formed on the outer ring side raceway surface 12, the rolling surface 41 rolling on the inner ring side raceway surface 22, and the end surface on the small diameter side. A small-diameter side end surface 42 and a large-diameter side end surface 43 formed on the large-diameter side end surface.

続いて上述した構成にもとづいて、作用について説明する。   Next, the operation will be described based on the configuration described above.

外輪１１に対して内輪２０が回転すると、円すいころ４０は外輪側軌道面１２上と内輪側軌道面２２上を転動しながら内輪２０の回転方向と同方向に移動する。円すいころ４０の転動によって保持器３０が内輪２０と同方向に回転する。   When the inner ring 20 rotates with respect to the outer ring 11, the tapered roller 40 moves in the same direction as the rotation direction of the inner ring 20 while rolling on the outer ring side raceway surface 12 and the inner ring side raceway surface 22. The retainer 30 rotates in the same direction as the inner ring 20 by the rolling of the tapered roller 40.

内輪２０に軸方向のスラスト力が作用すると、円すいころ４０の大径側端面４３が大径側内側端面２４ａに接触し、さらに円すいころ４０を介して外輪１１に前記スラスト力が作用する。円すいころ４０の大径側端面４３および大径側内側端面２４ａ間は滑り接触しながら、前記スラスト力の一部を受け止めるため、焼付きが発生しやすい。   When axial thrust force acts on the inner ring 20, the large-diameter side end surface 43 of the tapered roller 40 comes into contact with the large-diameter side inner end surface 24 a, and further, the thrust force acts on the outer ring 11 via the tapered roller 40. Since a part of the thrust force is received while sliding between the large-diameter side end face 43 and the large-diameter side inner end face 24a of the tapered roller 40, seizure is likely to occur.

これに対し、外輪１１および内輪２０間の油流路へ潤滑油が供給され、小径側鍔部２３から大径側鍔部２４へ潤滑油が流れる。このとき、矢印５０に示すように、保持器３０および内輪２０間の油流路を流れる流れと、矢印５１に示すように、油導入空間３８、油導入通路３２の順に流れ、さらに保持器３０および内輪２０間の油流路を流れる流れの２つがあり、いずれの流れも、円すいころ４０の大径側端面４３および大径側内側端面２４ａ間の滑り接触する箇所へ供給されるので、焼付きを防止できる。油導入空間３８、油導入通路３２、絞り３７によって、円すいころ４０の大径側端面４３および大径側内側端面２４ａ間へ供給される潤滑油の流量が増え、自動車の発進時等の車速が低い状態で全体の潤滑油の供給量が少なくても、円すいころ４０の大径側端面４３および大径側内側端面２４ａ間の焼き付きを防止できる。油導入通路３２が、保持器３０の外径側あるいは内径側の円すいころ４０が移動する空間に設けられていないので、油導入通路３２に潤滑油を流しても、攪拌抵抗が増えることがない。   In contrast, the lubricating oil is supplied to the oil flow path between the outer ring 11 and the inner ring 20, and the lubricating oil flows from the small diameter side flange 23 to the large diameter side flange 24. At this time, as indicated by an arrow 50, a flow that flows through the oil flow path between the retainer 30 and the inner ring 20, and as indicated by an arrow 51, the oil introduction space 38 and the oil introduction passage 32 flow in this order. There are two flows that flow through the oil flow path between the inner ring 20 and each flow is supplied to the point of sliding contact between the large-diameter side end face 43 and the large-diameter side inner end face 24a of the tapered roller 40. Can prevent sticking. The oil introduction space 38, the oil introduction passage 32, and the restriction 37 increase the flow rate of the lubricating oil supplied between the large diameter side end face 43 and the large diameter side inner end face 24a of the tapered roller 40, and the vehicle speed at the time of starting the automobile is increased. Even if the supply amount of the entire lubricating oil is small in a low state, seizure between the large diameter side end face 43 and the large diameter side inner end face 24a of the tapered roller 40 can be prevented. Since the oil introduction passage 32 is not provided in a space in which the tapered roller 40 on the outer diameter side or the inner diameter side of the cage 30 moves, even if lubricating oil flows through the oil introduction passage 32, the stirring resistance does not increase. .

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、ポケット３１の円周方向両側で、ポケット３１に開口する位置に油導入通路３２を設けた。他の実施形態として、図３および図４の一点鎖線で示すように、複数のポケット３１間で、ポケット３１に開口しない位置に油導入通路７０を設けても良い。この油導入通路７０は、断面円形で、一方が小径側外側端面３４に開口し、他方が大径側外側端面６２に開口している。油導入通路７０が、保持器３０の外径側あるいは内径側の円すいころ４０が移動する空間に設けられていないので、油導入通路７０に矢印７１に示すように潤滑油を流しても、攪拌抵抗が増えることがない。油導入通路７０を流れる潤滑油は、円すいころ４０の外周に触れることないため、円すいころ４０の回転抵抗が大幅に増えることがない。   In the above-described embodiment, the oil introduction passage 32 is provided at a position opening in the pocket 31 on both sides in the circumferential direction of the pocket 31. As another embodiment, as shown by a one-dot chain line in FIGS. 3 and 4, an oil introduction passage 70 may be provided between the plurality of pockets 31 at a position where the pocket 31 does not open. The oil introduction passage 70 has a circular cross section, and one opens to the small-diameter side outer end surface 34 and the other opens to the large-diameter side outer end surface 62. Since the oil introduction passage 70 is not provided in a space in which the tapered roller 40 on the outer diameter side or the inner diameter side of the cage 30 moves, even if lubricating oil flows through the oil introduction passage 70 as indicated by an arrow 71, stirring is performed. Resistance does not increase. Since the lubricating oil flowing through the oil introduction passage 70 does not touch the outer periphery of the tapered roller 40, the rotational resistance of the tapered roller 40 does not increase significantly.

上述した実施形態は、第１の案内面３３を外輪側軌道面１２に対し内径方向に離れた位置に設けることによって、外輪側軌道面１２、第３の案内面３６、小径側外側端面３４で囲まれた油導入空間３８を形成したが、第１の案内面３３を第２の案内面３５と同一の面にしても良い。この場合、小径側外側端面３４は、図１の位置よりも小径側鍔部２３側に位置し、保持器３０の端面と同一の面となる。   In the embodiment described above, the first guide surface 33 is provided at a position away from the outer ring side raceway surface 12 in the inner diameter direction, so that the outer ring side raceway surface 12, the third guide surface 36, and the small diameter side outer end surface 34 are provided. Although the enclosed oil introduction space 38 is formed, the first guide surface 33 may be the same surface as the second guide surface 35. In this case, the small-diameter side outer end surface 34 is located closer to the small-diameter side flange portion 23 than the position of FIG. 1 and is the same surface as the end surface of the cage 30.

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）、２３：小径側鍔部、２４：大径側鍔部、２４ａ：大径側内側端面、３０：保持器、３１：ポケット、３２：油導入通路、３４：小径側外側端面、３７：絞り、３８：油導入空間、４０：円すいころ、６２：大径側外側端面   11: Outer ring, 12: Outer ring side raceway surface (track surface), 20: Inner ring, 22: Inner ring side raceway surface (track surface), 23: Small diameter side collar, 24: Large diameter side collar, 24a: Large diameter side Inner end face, 30: Cage, 31: Pocket, 32: Oil introduction passage, 34: Small diameter side outer end face, 37: Restriction, 38: Oil introduction space, 40: Tapered roller, 62: Large diameter side outer end face

Claims (1)

外輪と、前記外輪の内周側に配置される内輪と、前記外輪および前記内輪間に配置され円周上等間隔に複数のポケットを有する保持器と、前記ポケットに配置される複数の円すいころとからなり、前記外輪の内周および前記内輪の外周に前記円すいころが転動する軌道面を形成し、前記内輪に前記軌道面の軸方向両側の一方に小径側鍔部を、他方に大径側鍔部を形成し、この大径側鍔部に前記円すいころが滑り接触する大径側内側端面を形成し、前記外輪および前記内輪間にできる空間が、前記内輪の小径側鍔部から大径側鍔部へ潤滑油が流れる油流路とされている円すいころ軸受において、前記保持器は、前記大径側内側端面と対応する位置まで半径方向に肉厚を有するとともに、前記大径側内側端面と向かい合わせで対向する大径側外側端面を有し、さらにこの大径側外側端面と反対側に小径側外側端面を有し、一方が前記小径側外側端面に開口し、他方が大径側外側端面に開口する油導入通路を前記保持器に設け、前記油導入通路は、複数のポケット間で、前記ポケットに開口しない位置に設けたことを特徴とする円すいころ軸受。 An outer ring, an inner ring disposed on the inner peripheral side of the outer ring, a cage disposed between the outer ring and the inner ring and having a plurality of pockets at equal intervals on the circumference, and a plurality of tapered rollers disposed in the pockets A raceway surface on which the tapered roller rolls is formed on the inner periphery of the outer ring and the outer periphery of the inner ring, and the inner ring has a small-diameter side flange on one side of the raceway surface in the axial direction and a large on the other side. A diameter side flange is formed, a large diameter side inner end surface on which the tapered roller is in sliding contact with the large diameter side flange is formed, and a space formed between the outer ring and the inner ring is formed from the small diameter side flange of the inner ring. In the tapered roller bearing in which the lubricating oil flows into the large-diameter side flange, the cage has a radial thickness up to a position corresponding to the large-diameter inner end surface, and the large-diameter Large-diameter outer side facing the inner side end face And an oil introduction passage having a small-diameter side outer end surface opposite to the large-diameter side outer end surface, one opening at the small-diameter side outer end surface, and the other opening at the large-diameter side outer end surface. A tapered roller bearing provided in a cage , wherein the oil introduction passage is provided at a position between a plurality of pockets so as not to open to the pockets .
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US20160040716A1 (en) 2013-04-04 2016-02-11 Nsk Ltd. Resin cage for tapered roller bearing and tapered roller bearing including the resin cage
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