JP2008202785A - Tapered roller bearing - Google Patents

Tapered roller bearing Download PDF

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Publication number
JP2008202785A
JP2008202785A JP2008014770A JP2008014770A JP2008202785A JP 2008202785 A JP2008202785 A JP 2008202785A JP 2008014770 A JP2008014770 A JP 2008014770A JP 2008014770 A JP2008014770 A JP 2008014770A JP 2008202785 A JP2008202785 A JP 2008202785A
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Japan
Prior art keywords
cage
diameter side
tapered roller
roller bearing
side end
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Pending
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JP2008014770A
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Japanese (ja)
Inventor
Takashi Noda
隆史 野田
Tomoji Sugiman
朋治 杉万
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NSK Ltd
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NSK Ltd
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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
    • F16C33/46—Cages for rollers or needles
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6674—Details of supply of the liquid to the bearing, e.g. passages or nozzles related to the amount supplied, e.g. gaps to restrict flow of the liquid
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/61—Toothed gear systems, e.g. support of pinion shafts

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tapered roller bearing for suppressing an increase of agitating resistance due to excessive flow-in of lubricating oil, actualizing smooth and sufficient supply of the lubricating oil passing through the bearing to another bearing and a gear while avoiding a reduction of the amount of the oil passing through the bearing, and reducing its rotating torque. <P>SOLUTION: The tapered roller bearing 10 comprises a first adjusting means 17 for adjusting a clearance between a small diameter side end 14b of a cage 14 and an inner ring 12, and a second adjusting means 18 for adjusting a clearance between a small diameter side end 14b of the cage 14 and an outer ring 11. The small diameter side end face of the cage 24 is formed to be almost flush with a plane connecting the inner peripheral edge of the small diameter side end face of the outer ring 11 and the outer peripheral edge of the small diameter side end face of the inner ring 12. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

本発明は、円すいころ軸受に関し、例えば、車両用自動変速機内に収容される潤滑油を利用して潤滑を行なう円すいころ軸受に関する。   The present invention relates to a tapered roller bearing, for example, a tapered roller bearing that performs lubrication using a lubricating oil contained in an automatic transmission for a vehicle.

従来の円すいころ軸受としては、例えば、図９に示す円すいころ軸受１００が知られている。この円すいころ軸受１００は、内周面に外輪軌道面１０１ａを有する外輪１０１と、外周面に内輪軌道面１０２ａを有する内輪１０２と、外輪軌道面１０１ａと内輪軌道面１０２ａとの間に転動自在に配設される複数の円すいころ１０３と、円すいころ１０３を円周方向に等間隔に保持する保持器１０４と、を備える。   As a conventional tapered roller bearing, for example, a tapered roller bearing 100 shown in FIG. 9 is known. The tapered roller bearing 100 is freely rollable between an outer ring 101 having an outer ring raceway surface 101a on an inner peripheral surface, an inner ring 102 having an inner ring raceway surface 102a on an outer peripheral surface, and the outer ring raceway surface 101a and the inner ring raceway surface 102a. And a plurality of tapered rollers 103 disposed in the cage, and a cage 104 that holds the tapered rollers 103 at equal intervals in the circumferential direction.

ところで、自動変速機のカウンタドライブギヤを回転可能に支持する円すいころ軸受１００は、軸の回転による遠心力により飛散した潤滑油を利用して潤滑を行い、また、自転による遠心力で後方のプラネタリギヤに潤滑油を供給する。   By the way, the tapered roller bearing 100 that rotatably supports the counter drive gear of the automatic transmission performs lubrication using the lubricating oil scattered by the centrifugal force due to the rotation of the shaft, and the rear planetary gear by the centrifugal force due to the rotation. Supply lubricating oil to

また、円すいころ軸受１００は、軸受回転に伴うポンプ作用により、保持器１０４の小径側端部と内輪１０２とのすき間から潤滑油が流入し、保持器１０４の大径側端部と内輪１０２とのすき間、及び保持器１０４の小径側端部と外輪１０１とのすき間から潤滑油が流出する。そして、保持器１０４の小径側端部と外輪１０１とのすき間寸法を小さくすることにより、このすき間から流出する潤滑油の流量が減少して、保持器１０４の大径側端部と内輪１０２とのすき間から流出する潤滑油の流量が増大することが知られている（例えば、特許文献１参照）。   Further, in the tapered roller bearing 100, the lubricating oil flows from the gap between the small diameter side end portion of the cage 104 and the inner ring 102 by the pump action accompanying the bearing rotation, and the large diameter side end portion of the cage 104 and the inner ring 102 Lubricating oil flows out from the gap and the gap between the small diameter side end of the cage 104 and the outer ring 101. Then, by reducing the clearance dimension between the small-diameter end of the cage 104 and the outer ring 101, the flow rate of the lubricating oil flowing out from the clearance is reduced, and the large-diameter end of the cage 104 and the inner ring 102 It is known that the flow rate of lubricating oil flowing out from the gap increases (for example, see Patent Document 1).

一方、保持器１０４の小径側端部と内輪１０２とのすき間寸法を小さくして、このすき間から流入する潤滑油の量を規制することにより、潤滑油の過剰流入による攪拌抵抗の増大を抑制する技術が提案されている（例えば、特許文献２参照）。   On the other hand, by reducing the gap between the small-diameter side end of the cage 104 and the inner ring 102 and regulating the amount of lubricating oil flowing from this gap, an increase in stirring resistance due to excessive inflow of lubricating oil is suppressed. A technique has been proposed (see, for example, Patent Document 2).

特開平１０−８９３５２号公報JP 10-89352 A 特開２００５−６９４２１号公報JP-A-2005-69421

ところで、多段自動変速機では、小型軽量化を図るべく、Ｌｅｐｅｌｌｅｔｉｅｒ方式と呼ばれるギヤトレインが採用されている。このギヤトレインは、プラネタリピニオン軸受の回転速度が非常に速くなることから、カウンタドライブギヤを回転可能に支持する円すいころ軸受１００の保持器１０４の大径側端部と内輪１０２とのすき間から流出する潤滑油が後方のプラネタリギヤへ十分且つスムースに供給されることが、プラネタリピニオン軸受の転動面の焼付きを抑制するための条件となる。   By the way, in a multi-stage automatic transmission, a gear train called a Lepeltier system is adopted in order to reduce the size and weight. In this gear train, the planetary pinion bearing has a very high rotational speed, so that the gear train flows out from the gap between the large-diameter end of the retainer 104 and the inner ring 102 of the tapered roller bearing 100 that rotatably supports the counter drive gear. A sufficient and smooth supply of the lubricating oil to the rear planetary gear is a condition for suppressing seizure of the rolling surface of the planetary pinion bearing.

しかしながら、上記特許文献２では、保持器１０４の小径側端部と内輪１０２とのすき間寸法を小さくして潤滑油の流入量を規制しているので、潤滑油の過剰流入による攪拌抵抗の増大を抑制することはできるが、軸受１００の貫通油量が減少し、保持器１０４の大径側端部と内輪１０２とのすき間から後方のプラネタリギヤへ流出する潤滑油の量が減少してしまう。このため、後方のプラネタリギヤへ十分且つスムースに潤滑油を供給することができず、プラネタリピニオン軸受の転動面に焼付きが発生する可能性があった。また、軸受の回転トルクを低減することが要求されていた。   However, in Patent Document 2, the clearance between the small-diameter side end of the cage 104 and the inner ring 102 is reduced to regulate the inflow amount of the lubricating oil, so that the agitation resistance is increased due to excessive inflow of the lubricating oil. Although it can be suppressed, the amount of oil penetrating the bearing 100 is reduced, and the amount of lubricating oil flowing out from the gap between the large-diameter end of the cage 104 and the inner ring 102 to the rear planetary gear is reduced. For this reason, the lubricating oil cannot be supplied to the rear planetary gear sufficiently and smoothly, and seizure may occur on the rolling surface of the planetary pinion bearing. Further, it has been required to reduce the rotational torque of the bearing.

本発明は、このような不都合を解消するためになされたものであり、その目的は、潤滑油の過剰流入による攪拌抵抗の増大を抑制することができると共に、軸受内の貫通油量の減少を回避して、軸受内を貫通した潤滑油を他の軸受やギヤ等に十分且つスムースに供給することができ、また、軸受の回転トルクを低減することができる円すいころ軸受を提供することにある。   The present invention has been made in order to eliminate such inconveniences, and an object of the present invention is to suppress an increase in agitation resistance due to excessive inflow of lubricating oil and to reduce the amount of penetrating oil in the bearing. An object of the present invention is to provide a tapered roller bearing capable of avoiding and supplying lubricating oil penetrating through the bearing sufficiently and smoothly to other bearings and gears, and reducing the rotational torque of the bearing. .

本発明の上記目的は、下記の構成により達成される。
（１） 内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、外輪軌道面と内輪軌道面との間に転動自在に配設される複数の円すいころと、円すいころを円周方向に等間隔に保持する保持器と、を備える円すいころ軸受であって、保持器の小径側端部と内輪とのすき間寸法を調整可能な第１調整手段と、保持器の小径側端部と外輪とのすき間寸法を調整可能な第２調整手段と、を有することを特徴とする円すいころ軸受。
（２） 第１調整手段は、保持器の小径側端部から径方向内側に突出する第１突起部であり、第２調整手段は、保持器の小径側端部から径方向外側に突出する第２突起部であることを特徴とする（１）に記載の円すいころ軸受。
（３） 保持器の小径側端面は、外輪の小径側端面の内周縁と内輪の小径側端面の外周縁とを結ぶ平面と略面一に形成されることを特徴とする（１）に記載の円すいころ軸受。 The above object of the present invention can be achieved by the following constitution.
(1) An outer ring having an outer ring raceway surface on the inner peripheral surface, an inner ring having an inner ring raceway surface on the outer peripheral surface, and a plurality of tapered rollers disposed so as to be freely rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a retainer that retains the tapered rollers at equal intervals in the circumferential direction, the first adjusting means capable of adjusting a clearance between the small-diameter side end of the retainer and the inner ring; A tapered roller bearing comprising: second adjusting means capable of adjusting a clearance between the small-diameter side end of the vessel and the outer ring.
(2) The first adjustment means is a first protrusion that protrudes radially inward from the small-diameter end of the cage, and the second adjustment means protrudes radially outward from the small-diameter end of the cage. The tapered roller bearing according to (1), which is a second protrusion.
(3) The small diameter side end surface of the cage is formed substantially flush with a plane connecting the inner peripheral edge of the small diameter side end surface of the outer ring and the outer peripheral edge of the small diameter side end surface of the inner ring. Tapered roller bearings.

本発明の円すいころ軸受によれば、保持器の小径側端部と内輪とのすき間寸法を調整可能な第１調整手段を有するため、第１調整手段で保持器の小径側端部と内輪とのすき間寸法を調整することにより、潤滑油の流入量を規制することができる。これにより、潤滑油の過剰流入による攪拌抵抗の増大を抑制することができる。   According to the tapered roller bearing of the present invention, since the first adjustment means that can adjust the clearance between the small-diameter side end of the cage and the inner ring is provided, the first adjustment means uses the small-diameter side end of the cage and the inner ring. By adjusting the gap dimension, the inflow amount of the lubricating oil can be regulated. Thereby, an increase in stirring resistance due to excessive inflow of lubricating oil can be suppressed.

また、本発明の円すいころ軸受によれば、保持器の小径側端部と外輪とのすき間寸法を調整可能な第２調整手段を有するため、第２調整手段で保持器の小径側端部と外輪とのすき間寸法を調整することにより、保持器の小径側端部と外輪とのすき間から軸受内で逆流した潤滑油が流出する量を規制することができる。これにより、軸受内の貫通油量が減少することを回避して、保持器の大径側端部と内輪とのすき間から流出する潤滑油の量を増加させることができるので、軸受内を貫通した潤滑油を他の軸受やギヤ等に十分且つスムースに供給することができる。   In addition, according to the tapered roller bearing of the present invention, since the second adjustment means that can adjust the clearance between the small-diameter side end of the cage and the outer ring is provided, the second adjustment means uses the small-diameter side end of the cage. By adjusting the clearance between the outer ring and the outer ring, it is possible to regulate the amount of lubricating oil that has flowed back in the bearing from the gap between the small-diameter end of the cage and the outer ring. As a result, it is possible to avoid a decrease in the amount of penetrating oil in the bearing and increase the amount of lubricating oil flowing out from the gap between the large diameter end of the cage and the inner ring. The lubricated oil can be sufficiently and smoothly supplied to other bearings and gears.

また、本発明の円すいころ軸受によれば、保持器の小径側端面が、外輪の小径側端面の内周縁と内輪の小径側端面の外周縁とを結ぶ平面と略面一に形成されるため、外輪の小径側端面及び内輪の小径側端面が保持器の小径側端面を介して滑らかに連続する。これにより、軸受回転に伴うポンプ作用により軸受内に流入する潤滑油を整流化することができるので、軸受の回転トルクを低減することができる。   Further, according to the tapered roller bearing of the present invention, the end surface on the small diameter side of the cage is formed substantially flush with a plane connecting the inner periphery of the end surface on the small diameter side of the outer ring and the outer periphery of the end surface on the small diameter side of the inner ring. The small-diameter side end surface of the outer ring and the small-diameter side end surface of the inner ring are smoothly continuous via the small-diameter side end surface of the cage. As a result, the lubricating oil flowing into the bearing can be rectified by the pump action accompanying the rotation of the bearing, so that the rotational torque of the bearing can be reduced.

以下、本発明に係る円すいころ軸受の各実施形態について、図面を参照して詳細に説明する。   Hereinafter, each embodiment of the tapered roller bearing according to the present invention will be described in detail with reference to the drawings.

（第１実施形態）
まず、図１〜図３を参照して、本発明に係る円すいころ軸受の第１実施形態について説明する。
図１は本発明に係る円すいころ軸受の第１実施形態を説明するための要部断面図、図２は第１実施形態の変形例を説明するための要部断面図、図３は図２に示す円すいころ軸受の部分拡大図である。 (First embodiment)
First, with reference to FIGS. 1-3, 1st Embodiment of the tapered roller bearing which concerns on this invention is described.
FIG. 1 is a cross-sectional view of a main part for explaining a first embodiment of a tapered roller bearing according to the present invention, FIG. 2 is a cross-sectional view of a main part for explaining a modification of the first embodiment, and FIG. It is the elements on larger scale of the tapered roller bearing shown in FIG.

本実施形態の円すいころ軸受１０は、図１に示すように、内周面に外輪軌道面１１ａを有する外輪１１と、外周面に内輪軌道面１２ａを有する内輪１２と、外輪軌道面１１ａと内輪軌道面１２ａとの間に転動自在に配設される複数の円すいころ１３と、円すいころ１３を円周方向に等間隔に保持する保持器１４と、を備える。   As shown in FIG. 1, the tapered roller bearing 10 of the present embodiment includes an outer ring 11 having an outer ring raceway surface 11a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12a on an outer peripheral surface, an outer ring raceway surface 11a and an inner ring. A plurality of tapered rollers 13 disposed between the raceway surfaces 12a so as to be freely rollable, and a cage 14 that holds the tapered rollers 13 at equal intervals in the circumferential direction.

保持器１４は、例えば、ＳＰＣＣ等の金属材料のプレス成形品とされており、大径側円環部（大径側端部）１４ａと、大径側円環部１４ａと同軸配置される小径側円環部（小径側端部）１４ｂと、を有する。大径側円環部１４ａと小径側円環部１４ｂとは、円周方向に略等間隔で複数配置された柱部１５によって連結されており、円周方向に互いに隣り合う各柱部１５の間には、円すいころ１３を転動可能に保持するポケット部１６が形成される。   The retainer 14 is, for example, a press-molded product made of a metal material such as SPCC, and has a large diameter side annular portion (large diameter side end portion) 14a and a small diameter arranged coaxially with the large diameter side annular portion 14a. Side annular portion (small-diameter side end portion) 14b. The large-diameter-side annular portion 14a and the small-diameter-side annular portion 14b are connected by a plurality of column portions 15 that are arranged at substantially equal intervals in the circumferential direction, and each of the column portions 15 that are adjacent to each other in the circumferential direction. A pocket portion 16 for holding the tapered roller 13 so as to be able to roll is formed therebetween.

そして、本実施形態では、保持器１４の小径側円環部１４ｂを屈曲成形して、この小径側円環部１４ｂに、小径側円環部１４ｂから径方向内側に突出する第１突起部（第１調整手段）１７を形成すると共に、小径側円環部１４ｂから径方向外側に突出する第２突起部（第２調整手段）１８を形成する。   In the present embodiment, the small-diameter-side annular portion 14b of the cage 14 is bent, and the first-projection portion projecting radially inward from the small-diameter-side annular portion 14b is formed on the small-diameter-side annular portion 14b ( A first adjustment means) 17 is formed, and a second protrusion (second adjustment means) 18 that protrudes radially outward from the small-diameter-side annular portion 14b is formed.

ここで、第１突起部１７は、保持器１４の小径側円環部１４ｂと内輪１２とのすき間寸法を潤滑油の流入量を規制するように調整する。また、第２突起部１８は、保持器１４の小径側円環部１４ｂと外輪１１とのすき間寸法を潤滑油の流出量を規制するように調整する。   Here, the 1st projection part 17 adjusts the clearance dimension of the small diameter side annular part 14b of the holder | retainer 14, and the inner ring | wheel 12 so that the inflow amount of lubricating oil may be controlled. Moreover, the 2nd protrusion part 18 adjusts the clearance dimension of the small diameter side annular part 14b of the holder | retainer 14, and the outer ring | wheel 11 so that the outflow amount of lubricating oil may be controlled.

以上説明したように、本実施形態の円すいころ軸受１０によれば、保持器１４の小径側円環部１４ｂと内輪１２とのすき間寸法を調整可能な第１突起部１７を有するため、第１突起部１７で保持器１４の小径側円環部１４ｂと内輪１２とのすき間寸法を調整することにより、潤滑油の流入量を規制することができる。これにより、潤滑油の過剰流入による攪拌抵抗の増大を抑制することができる。   As described above, according to the tapered roller bearing 10 of the present embodiment, the first protrusion 17 capable of adjusting the clearance between the small-diameter-side annular portion 14b of the cage 14 and the inner ring 12 is provided. By adjusting the clearance dimension between the small-diameter-side annular portion 14b of the retainer 14 and the inner ring 12 with the protruding portion 17, the inflow amount of the lubricating oil can be regulated. Thereby, an increase in stirring resistance due to excessive inflow of lubricating oil can be suppressed.

また、本実施形態の円すいころ軸受１０によれば、保持器１４の小径側円環部１４ｂと外輪１１とのすき間寸法を調整可能な第２突起部１８を有するため、第２突起部１８で保持器１４の小径側円環部１４ｂと外輪１１とのすき間寸法を調整することにより、保持器１４の小径側円環部１４ｂと外輪１１とのすき間から軸受１０内で逆流した潤滑油が流出する量を規制することができる。これにより、軸受１０内の貫通油量が減少することを回避して、保持器１４の大径側円環部１４ａと内輪１２とのすき間から流出する潤滑油の量を増加させることができるので、軸受１０内を貫通した潤滑油を他の軸受やギヤ等に十分且つスムースに供給することができる。   Further, according to the tapered roller bearing 10 of the present embodiment, the second protrusion 18 is provided with the second protrusion 18 capable of adjusting the clearance dimension between the small-diameter-side annular portion 14b of the cage 14 and the outer ring 11. By adjusting the clearance dimension between the small-diameter-side annular portion 14b of the cage 14 and the outer ring 11, the lubricating oil that has flowed back in the bearing 10 flows out from the clearance between the small-diameter-side annular portion 14b of the cage 14 and the outer ring 11. The amount to do can be regulated. As a result, it is possible to increase the amount of lubricating oil flowing out from the gap between the large-diameter side annular portion 14a of the cage 14 and the inner ring 12 while avoiding a decrease in the amount of oil penetrating the bearing 10. The lubricating oil penetrating through the bearing 10 can be sufficiently and smoothly supplied to other bearings and gears.

なお、本実施形態の変形例として、図２及び図３に示すように、円すいころ軸受１０は、保持器１４の小径側円環部１４ｂの端面に、軸方向に対して略直交する方向に沿って切り欠いた面取部１９を設けている。この場合、軸受１０の軸方向の省スペース化を図ることができる。   As a modification of the present embodiment, as shown in FIGS. 2 and 3, the tapered roller bearing 10 is arranged on the end surface of the small-diameter side annular portion 14 b of the cage 14 in a direction substantially orthogonal to the axial direction. A chamfered portion 19 is provided along a notch. In this case, space saving in the axial direction of the bearing 10 can be achieved.

（第２実施形態）
次に、図４〜図６を参照して、本発明に係る円すいころ軸受の第２実施形態について説明する。なお、第１実施形態と同一又は同等部分については、図面に同一符号を付してその説明を省略或いは簡略化する。
図４は本発明に係る円すいころ軸受の第２実施形態を説明するための要部断面図、図５は第２実施形態の第１変形例を説明するための要部断面図、図６は図５に示す円すいころ軸受の部分拡大図、図７は第２実施形態の第２変形例を説明するための要部断面図、図８は第２実施形態の第３変形例を説明するための要部断面図である。 (Second Embodiment)
Next, with reference to FIGS. 4-6, 2nd Embodiment of the tapered roller bearing which concerns on this invention is described. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.
FIG. 4 is a cross-sectional view of a main part for explaining a second embodiment of the tapered roller bearing according to the present invention, FIG. 5 is a cross-sectional view of a main part for explaining a first modification of the second embodiment, and FIG. FIG. 7 is a fragmentary enlarged view of the tapered roller bearing shown in FIG. 5, FIG. 7 is a cross-sectional view of an essential part for explaining a second modification of the second embodiment, and FIG. 8 is for explaining a third modification of the second embodiment. FIG.

本実施形態の円すいころ軸受２０では、図４に示すように、保持器２４は、大径側円環部（大径側端部）２４ａと、大径側円環部２４ａと同軸配置される小径側円環部（小径側端部）２４ｂと、を有する。大径側円環部２４ａと小径側円環部２４ｂとは、円周方向に略等間隔で複数配置された柱部２５によって連結されており、円周方向に互いに隣り合う各柱部２５の間には、円すいころ１３を転動可能に保持するポケット部２６が形成される。   In the tapered roller bearing 20 of the present embodiment, as shown in FIG. 4, the cage 24 is arranged coaxially with the large diameter side annular portion (large diameter side end portion) 24 a and the large diameter side annular portion 24 a. A small-diameter-side annular portion (small-diameter-side end portion) 24b. The large-diameter-side annular portion 24a and the small-diameter-side annular portion 24b are connected by a plurality of column portions 25 that are arranged at substantially equal intervals in the circumferential direction, and each of the column portions 25 that are adjacent to each other in the circumferential direction. A pocket portion 26 for holding the tapered roller 13 so as to be able to roll is formed between them.

保持器２４の樹脂材料としては、４６ナイロンや６６ナイロンなどのポリアミド系樹脂、ポリブチレンテレフタレート、ポリフェレンサルファイド（ＰＰＳ）、ポリアミドイミド（ＰＡＩ）、熱可塑性ポリイミド、ポリエーテルエーテルケトン（ＰＥＥＫ）、ポリエーテルニトリル（ＰＥＮ）などが例示できる。また、上記した樹脂に１０〜５０重量％の繊維状充填材（例えば、ガラス繊維や炭素繊維など）を適宜添加することにより保持器の剛性及び寸法精度を向上させることができる。   The resin material of the cage 24 includes polyamide resins such as 46 nylon and 66 nylon, polybutylene terephthalate, polyferene sulfide (PPS), polyamideimide (PAI), thermoplastic polyimide, polyetheretherketone (PEEK), poly Examples include ether nitrile (PEN). Further, the rigidity and dimensional accuracy of the cage can be improved by appropriately adding 10 to 50% by weight of a fibrous filler (for example, glass fiber or carbon fiber) to the above-described resin.

そして、本実施形態では、保持器２４の小径側円環部２４ｂに、小径側円環部２４ｂから径方向内側に突出する第１突起部（第１調整手段）２７を形成すると共に、小径側円環部２４ｂから径方向外側に突出する第２突起部（第２調整手段）２８を形成する。   And in this embodiment, while forming the 1st protrusion part (1st adjustment means) 27 which protrudes in a radial inside from the small diameter side annular part 24b in the small diameter side annular part 24b of the holder | retainer 24, a small diameter side A second protrusion (second adjusting means) 28 that protrudes radially outward from the annular portion 24b is formed.

ここで、第１突起部２７は、保持器２４の小径側円環部２４ｂと内輪１２とのすき間寸法を潤滑油の流入量を規制するように調整する。また、第２突起部２８は、保持器２４の小径側円環部２４ｂと外輪１１とのすき間寸法を潤滑油の流出量を規制するように調整する。   Here, the 1st projection part 27 adjusts the clearance dimension of the small diameter side annular part 24b of the holder | retainer 24, and the inner ring | wheel 12 so that the inflow amount of lubricating oil may be controlled. Moreover, the 2nd projection part 28 adjusts the clearance dimension of the small diameter side annular part 24b of the holder | retainer 24, and the outer ring | wheel 11 so that the outflow amount of lubricating oil may be controlled.

以上説明したように、本実施形態の円すいころ軸受２０によれば、保持器２４の小径側円環部２４ｂと内輪１２とのすき間寸法を調整可能な第１突起部２７を有するため、第１突起部２７で保持器２４の小径側円環部２４ｂと内輪１２とのすき間寸法を調整することにより、潤滑油の流入量を規制することができる。これにより、潤滑油の過剰流入による攪拌抵抗の増大を抑制することができる。   As described above, according to the tapered roller bearing 20 of the present embodiment, the first protrusion 27 that can adjust the clearance dimension between the small-diameter-side annular portion 24b of the cage 24 and the inner ring 12 is provided. By adjusting the clearance dimension between the small-diameter-side annular portion 24b of the retainer 24 and the inner ring 12 with the protrusion 27, the inflow amount of the lubricating oil can be regulated. Thereby, an increase in stirring resistance due to excessive inflow of lubricating oil can be suppressed.

また、本実施形態の円すいころ軸受２０によれば、保持器２４の小径側円環部２４ｂと外輪１１とのすき間寸法を調整可能な第２突起部２８を有するため、第２突起部２８で保持器２４の小径側円環部２４ｂと外輪１１とのすき間寸法を調整することにより、保持器２４の小径側円環部２４ｂと外輪１１とのすき間から軸受２０内で逆流した潤滑油が流出する量を規制することができる。これにより、軸受２０内の貫通油量が減少することを回避して、保持器２４の大径側円環部２４ａと内輪１２とのすき間から流出する潤滑油の量を増加させることができるので、軸受２０内を貫通した潤滑油を他の軸受やギヤ等に十分且つスムースに供給することができる。   Further, according to the tapered roller bearing 20 of the present embodiment, the second protrusion 28 is provided with the second protrusion 28 that can adjust the clearance between the small-diameter-side annular portion 24b of the cage 24 and the outer ring 11. By adjusting the clearance dimension between the small-diameter-side annular portion 24b of the cage 24 and the outer ring 11, the lubricating oil that has flowed back in the bearing 20 flows out from the clearance between the small-diameter-side annular portion 24b of the cage 24 and the outer ring 11. The amount to do can be regulated. Thereby, it is possible to avoid a decrease in the amount of penetrating oil in the bearing 20 and to increase the amount of lubricating oil flowing out from the gap between the large-diameter side annular portion 24a of the cage 24 and the inner ring 12. The lubricating oil penetrating through the bearing 20 can be sufficiently and smoothly supplied to other bearings and gears.

さらに、本実施形態の円すいころ軸受２０によれば、保持器２４が合成樹脂により形成されるので、保持器２４及び軸受２０の軽量化を図ることができると共に、軸受２０の軸受トルクを低減することができる。   Furthermore, according to the tapered roller bearing 20 of the present embodiment, since the cage 24 is formed of synthetic resin, the cage 24 and the bearing 20 can be reduced in weight, and the bearing torque of the bearing 20 can be reduced. be able to.

なお、本実施形態の第１変形例として、図５及び図６に示すように、円すいころ軸受２０は、保持器２４の小径側円環部２４ｂの端面に、軸方向に対して略直交する方向に沿って切り欠いた面取部２９を設けている。この場合、軸受２０の軸方向の省スペース化を図ることができる。   As a first modification of the present embodiment, as shown in FIGS. 5 and 6, the tapered roller bearing 20 is substantially orthogonal to the axial direction on the end surface of the small-diameter-side annular portion 24 b of the cage 24. A chamfered portion 29 cut out along the direction is provided. In this case, space saving in the axial direction of the bearing 20 can be achieved.

また、本実施形態の第２変形例として、図７に示すように、円すいころ軸受２０は、保持器２４の小径側円環部２４ｂの端面に、外輪１１の小径側端面の内周縁と内輪１２の小径側端面の外周縁とを結ぶ平面と保持器２４の小径側円環部２４ｂの端面とが略面一（略同一平面上）となるように面取部３０を設けている。このため、外輪１１の小径側端面及び内輪１２の小径側端面が保持器２４の小径側円環部２４ｂの端面である面取部３０を介して滑らかに連続する。この場合、保持器２４の小径側円環部２４ｂによる潤滑油攪拌がなく渦生成が防止されるので、軸受回転に伴うポンプ作用により軸受２０内に流入する潤滑油を整流化することができる。これにより、軸受２０の回転トルクを低減することができる。   As a second modification of the present embodiment, as shown in FIG. 7, the tapered roller bearing 20 includes an inner peripheral edge and an inner ring of a small diameter side end surface of the outer ring 11 on an end surface of the small diameter side annular portion 24 b of the cage 24. The chamfered portion 30 is provided so that the plane connecting the outer peripheral edges of the 12 small-diameter end surfaces and the end surface of the small-diameter annular portion 24b of the cage 24 are substantially flush (on the same plane). For this reason, the small-diameter side end surface of the outer ring 11 and the small-diameter side end surface of the inner ring 12 are smoothly continued through the chamfered portion 30 that is the end surface of the small-diameter side annular portion 24 b of the cage 24. In this case, since the lubricating oil is not stirred by the small-diameter side annular portion 24b of the cage 24 and vortex generation is prevented, the lubricating oil flowing into the bearing 20 can be rectified by the pump action accompanying the bearing rotation. Thereby, the rotational torque of the bearing 20 can be reduced.

また、本実施形態の第３変形例として、図８に示すように、円すいころ軸受２０は、外輪１１の小径側端部を軸方向外側に延出しており、保持器２４の小径側円環部２４ｂの端面である傾斜面３１は、外輪１１の小径側端面の内周縁と内輪１２の小径側端面の外周縁とを結ぶ円すい面と略面一（略同一円すい面上）に形成されている。このため、外輪１１の小径側端面及び内輪１２の小径側端面が保持器２４の小径側円環部２４ｂの端面である傾斜面３１を介して滑らかに連続する。この場合、保持器２４の小径側円環部２４ｂによる潤滑油攪拌がなく渦生成が防止され、軸受２０の小径側端部付近を流れる潤滑油が図中の矢印Ａのように滑らかに流れるので、軸受回転に伴うポンプ作用により軸受２０内に流入する潤滑油を整流化することができる。これにより、軸受２０の回転トルクを低減することができる。   As a third modification of the present embodiment, as shown in FIG. 8, the tapered roller bearing 20 has an end on the small diameter side of the outer ring 11 extending outward in the axial direction, and a small diameter side ring of the cage 24. The inclined surface 31 which is an end surface of the portion 24b is formed substantially flush with (a substantially identical conical surface) the conical surface connecting the inner peripheral edge of the small-diameter side end surface of the outer ring 11 and the outer peripheral edge of the small-diameter side end surface of the inner ring 12. Yes. For this reason, the small-diameter side end surface of the outer ring 11 and the small-diameter side end surface of the inner ring 12 continue smoothly through the inclined surface 31 that is the end surface of the small-diameter side annular portion 24b of the cage 24. In this case, there is no lubricating oil agitation by the small-diameter side annular portion 24b of the cage 24 and vortex generation is prevented, and the lubricating oil flowing near the small-diameter end of the bearing 20 flows smoothly as indicated by the arrow A in the figure. The lubricating oil flowing into the bearing 20 can be rectified by the pump action accompanying the bearing rotation. Thereby, the rotational torque of the bearing 20 can be reduced.

本発明に係る円すいころ軸受の第１実施形態を説明するための要部断面図である。It is principal part sectional drawing for demonstrating 1st Embodiment of the tapered roller bearing which concerns on this invention. 第１実施形態の変形例を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the modification of 1st Embodiment. 図２に示す円すいころ軸受の部分拡大図である。It is the elements on larger scale of the tapered roller bearing shown in FIG. 本発明に係る円すいころ軸受の第２実施形態を説明するための要部断面図である。It is principal part sectional drawing for demonstrating 2nd Embodiment of the tapered roller bearing which concerns on this invention. 第２実施形態の第１変形例を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the 1st modification of 2nd Embodiment. 図５に示す円すいころ軸受の部分拡大図である。It is the elements on larger scale of the tapered roller bearing shown in FIG. 第２実施形態の第２変形例を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the 2nd modification of 2nd Embodiment. 第２実施形態の第３変形例を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the 3rd modification of 2nd Embodiment. 従来の円すいころ軸受を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the conventional tapered roller bearing.

符号の説明Explanation of symbols

１０，２０ 円すいころ軸受
１１ 外輪
１１ａ 外輪軌道面
１２ 内輪
１２ａ 内輪軌道面
１３ 円すいころ
１４，２４ 保持器
１４ａ，２４ａ 大径側円環部（大径側端部）
１４ｂ，２４ｂ 小径側円環部（小径側端部）
１５，２５ 柱部
１６，２６ ポケット部
１７，２７ 第１突起部（第１調整手段）
１８，２８ 第２突起部（第２調整手段）
１９，２９，３０ 面取部
３１ 傾斜面 10, 20 Tapered roller bearing 11 Outer ring 11a Outer ring raceway surface 12 Inner ring 12a Inner ring raceway surface 13 Tapered rollers 14, 24 Cage 14a, 24a Large diameter side annular portion (large diameter side end)
14b, 24b Smaller diameter ring (smaller diameter end)
15, 25 Column portion 16, 26 Pocket portion 17, 27 First protrusion (first adjusting means)
18, 28 Second protrusion (second adjusting means)
19, 29, 30 Chamfer 31 Inclined surface

Claims (3)

内周面に外輪軌道面を有する外輪と、外周面に内輪軌道面を有する内輪と、前記外輪軌道面と前記内輪軌道面との間に転動自在に配設される複数の円すいころと、前記円すいころを円周方向に等間隔に保持する保持器と、を備える円すいころ軸受であって、
前記保持器の小径側端部と前記内輪とのすき間寸法を調整可能な第１調整手段と、前記保持器の小径側端部と前記外輪とのすき間寸法を調整可能な第２調整手段と、を有することを特徴とする円すいころ軸受。 An outer ring having an outer ring raceway surface on an inner peripheral surface, an inner ring having an inner ring raceway surface on an outer peripheral surface, and a plurality of tapered rollers disposed so as to be freely rollable between the outer ring raceway surface and the inner ring raceway surface; A tapered roller bearing comprising: a retainer that holds the tapered rollers at equal intervals in a circumferential direction;
A first adjusting means capable of adjusting a clearance dimension between the small diameter side end of the cage and the inner ring; a second adjusting means capable of adjusting a clearance dimension between the small diameter side end of the cage and the outer ring; A tapered roller bearing characterized by comprising: 前記第１調整手段は、前記保持器の小径側端部から径方向内側に突出する第１突起部であり、前記第２調整手段は、前記保持器の小径側端部から径方向外側に突出する第２突起部であることを特徴とする請求項１に記載の円すいころ軸受。   The first adjustment means is a first protrusion that protrudes radially inward from the small diameter end of the cage, and the second adjustment means protrudes radially outward from the small diameter end of the cage. The tapered roller bearing according to claim 1, wherein the tapered roller bearing is a second protruding portion. 前記保持器の小径側端面は、前記外輪の小径側端面の内周縁と前記内輪の小径側端面の外周縁とを結ぶ平面と略面一に形成されることを特徴とする請求項１に記載の円すいころ軸受。   The small diameter side end surface of the cage is formed to be substantially flush with a plane connecting the inner peripheral edge of the small diameter side end surface of the outer ring and the outer peripheral edge of the small diameter side end surface of the inner ring. Tapered roller bearings.
JP2008014770A 2007-01-25 2008-01-25 Tapered roller bearing Pending JP2008202785A (en)

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JP2008014770A JP2008202785A (en) 2007-01-25 2008-01-25 Tapered roller bearing

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KR101404791B1 (en) 2014-02-28 2014-06-12 주식회사 베어링아트 Taper roller bearing
KR101454909B1 (en) * 2013-02-26 2014-11-03 주식회사 베어링아트 Taper roller bearing
WO2015045746A1 (en) * 2013-09-27 2015-04-02 Ntn株式会社 Tapered roller bearing
CN104747591A (en) * 2013-12-25 2015-07-01 株式会社捷太格特 Tapered roller bearing
EP2889501A2 (en) 2013-12-25 2015-07-01 Jtekt Corporation Tapered roller bearing
US9441674B2 (en) 2013-12-25 2016-09-13 Jtekt Corporation Ball bearing

Cited By (14)

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Publication number Priority date Publication date Assignee Title
KR101454909B1 (en) * 2013-02-26 2014-11-03 주식회사 베어링아트 Taper roller bearing
JP2015068378A (en) * 2013-09-27 2015-04-13 Ntn株式会社 Conical roller bearing
WO2015045746A1 (en) * 2013-09-27 2015-04-02 Ntn株式会社 Tapered roller bearing
EP2889501A2 (en) 2013-12-25 2015-07-01 Jtekt Corporation Tapered roller bearing
CN104747591A (en) * 2013-12-25 2015-07-01 株式会社捷太格特 Tapered roller bearing
EP2889500A2 (en) 2013-12-25 2015-07-01 Jtekt Corporation Tapered roller bearing
CN104747601A (en) * 2013-12-25 2015-07-01 株式会社捷太格特 Tapered roller bearing
EP2889500A3 (en) * 2013-12-25 2015-08-05 Jtekt Corporation Tapered roller bearing
EP2889501A3 (en) * 2013-12-25 2015-08-05 Jtekt Corporation Tapered roller bearing
JP2015194245A (en) * 2013-12-25 2015-11-05 株式会社ジェイテクト Conical roller bearing
US9228612B2 (en) 2013-12-25 2016-01-05 Jtekt Corporation Tapered roller bearing
US9416823B2 (en) 2013-12-25 2016-08-16 Jtekt Corporation Tapered roller bearing
US9441674B2 (en) 2013-12-25 2016-09-13 Jtekt Corporation Ball bearing
KR101404791B1 (en) 2014-02-28 2014-06-12 주식회사 베어링아트 Taper roller bearing

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