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JP2007225037A - Tapered roller bearing - Google Patents

Tapered roller bearing Download PDF

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Publication number
JP2007225037A
JP2007225037A JP2006047208A JP2006047208A JP2007225037A JP 2007225037 A JP2007225037 A JP 2007225037A JP 2006047208 A JP2006047208 A JP 2006047208A JP 2006047208 A JP2006047208 A JP 2006047208A JP 2007225037 A JP2007225037 A JP 2007225037A
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Japan
Prior art keywords
inner ring
tapered roller
roller bearing
bearing
cylindrical
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Pending
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JP2006047208A
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Japanese (ja)
Inventor
Tomoharu Saito
智治 齋藤
Kenichi Shibazaki
健一 柴崎
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NSK Ltd
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NSK Ltd
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Priority to JP2006047208A priority Critical patent/JP2007225037A/en
Publication of JP2007225037A publication Critical patent/JP2007225037A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • 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

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

Abstract

【課題】軸受内のオイルの流れを適正化することによって、軸受へのオイル流入量を低減し、流入オイルの攪拌抵抗を小さくして、これにより、軸受の低トルク化を図ることができる円すいころ軸受を提供する。
【解決手段】円すいころ軸受１０は、保持器１４に内輪１１の外周面と平行な平行面１８を設けると共に、この平行面１８の内輪１１の外周面に沿う幅寸法を保持器１４の肉厚より大きくして、平行面１８と内輪１１の外周面との間にラビリンスシール部１９ａを形成する。
【選択図】図１A cone that can reduce the amount of oil flowing into the bearing and reduce the agitation resistance of the flowing oil by optimizing the flow of oil in the bearing, thereby reducing the torque of the bearing. Provide roller bearings.
A tapered roller bearing 10 is provided with a parallel surface 18 parallel to an outer peripheral surface of an inner ring 11 on a cage 14, and a width dimension of the parallel surface 18 along the outer peripheral surface of the inner ring 11 is set to be a thickness of the cage 14. The labyrinth seal portion 19a is formed between the parallel surface 18 and the outer peripheral surface of the inner ring 11 by increasing the size.
[Selection] Figure 1

Description

本発明は、例えば、自動車の減速装置等に組み込まれる円すいころ軸受に関し、特に、オイル潤滑環境で用いられる円すいころ軸受に関する。   The present invention relates to a tapered roller bearing incorporated into, for example, a reduction gear of an automobile, and more particularly to a tapered roller bearing used in an oil lubrication environment.

円すいころ軸受は、コンパクトで、大きなラジアル荷重及びアキシャル荷重を支持することができ、しかも、高速回転で使用することができるため広く使用されている。ところで、オイル潤滑環境で用いられる円すいころ軸受では、軸受回転に伴うポンプ作用によって内輪の小径側端部からオイルが軸受内部に流入して大径側より排出されるが、その際に、円すいころと内輪との間の抵抗の他に、流入オイルの攪拌による抵抗が働き、軸受トルクが増大する。   Tapered roller bearings are widely used because they are compact, can support large radial loads and axial loads, and can be used at high speeds. By the way, in a tapered roller bearing used in an oil-lubricated environment, oil flows into the bearing from the small-diameter end of the inner ring and is discharged from the large-diameter side due to the pump action associated with the rotation of the bearing. In addition to the resistance between the inner ring and the inner ring, the resistance caused by the agitation of the inflowing oil works to increase the bearing torque.

円すいころ軸受の軸受トルクの増大を抑制して低トルク化を図る円すいころ軸受として、従来、図９に示すものが提案されている（例えば、特許文献１参照）。この円すいころ軸受１は、内輪２と外輪３との間に複数の円すいころ４が略円すい筒状の保持器５を介して周方向に転動可能に配設される。保持器５の小径側端部は径方向内方に折り曲げられており、この折り曲げ部６の先端部と内輪２の外周面との間にはラビリンスシール部７が形成される。そして、このラビリンスシール部７により、軸受へのオイル流入量を低減して、攪拌抵抗を減らし、軸受のトルク増大を抑制している。   As a tapered roller bearing for reducing the torque by suppressing an increase in bearing torque of the tapered roller bearing, the one shown in FIG. 9 has been conventionally proposed (for example, see Patent Document 1). In the tapered roller bearing 1, a plurality of tapered rollers 4 are arranged between an inner ring 2 and an outer ring 3 so as to be able to roll in a circumferential direction via a substantially tapered cylindrical cage 5. The end portion on the small diameter side of the cage 5 is bent radially inward, and a labyrinth seal portion 7 is formed between the distal end portion of the bent portion 6 and the outer peripheral surface of the inner ring 2. The labyrinth seal portion 7 reduces the amount of oil flowing into the bearing, reduces the stirring resistance, and suppresses an increase in the torque of the bearing.

また、円すいころ軸受内の空間断面積をオイルが出る出口側程大きくすることで、軸受に入るオイル量より出るオイル量を多くし、これにより、軸受内部に滞留するオイル量を少なくし、流入オイルの攪拌抵抗を小さくして、軸受トルクの増大を抑制する円すいころ軸受が提案されている（例えば、特許文献２参照）。   Also, by increasing the space cross-sectional area in the tapered roller bearing toward the oil outlet, the amount of oil that outflows from the amount of oil that enters the bearing is reduced. Tapered roller bearings have been proposed in which oil agitation resistance is reduced to suppress an increase in bearing torque (see, for example, Patent Document 2).

特開２００５−６９４２１号公報JP 2005-69421 A 特開２００４−７６７６６号公報JP 2004-76766 A

しかしながら、上記特許文献１に記載の円すいころ軸受１においては、保持器５の小径側端部に形成した折り曲げ部６の先端部の軸方向の長さ寸法が保持器肉厚寸法に相当するため、内輪の外周面との間で十分なラビリンスシール部７の長さを確保することができない。このため、ラビリンスシール部７のシール効果が十分ではなく、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくするには限界がある。   However, in the tapered roller bearing 1 described in Patent Document 1, the axial length of the tip of the bent portion 6 formed at the small diameter end of the cage 5 corresponds to the cage thickness. A sufficient length of the labyrinth seal portion 7 cannot be ensured between the inner ring and the outer peripheral surface of the inner ring. For this reason, the sealing effect of the labyrinth seal portion 7 is not sufficient, and there is a limit in reducing the amount of oil flowing into the bearing and reducing the stirring resistance of the inflowing oil.

また、上記特許文献２に記載の円すいころ軸受においては、軸受のオイル入口側及びオイル出口側の空間断面積の寸法管理が煩瑣で、内外輪の加工に手間がかかってしまう。   Further, in the tapered roller bearing described in Patent Document 2, the dimension management of the space cross-sectional area on the oil inlet side and the oil outlet side of the bearing is troublesome, and it takes time to process the inner and outer rings.

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、軸受内のオイルの流れを適正化することによって、軸受へのオイル流入量を低減し、流入オイルの攪拌抵抗を小さくして、これにより、軸受の低トルク化を図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 to eliminate such inconveniences, and its purpose is to reduce the amount of oil flowing into the bearing by optimizing the flow of oil in the bearing, and to agitate the inflowing oil. It is an object of the present invention to provide a tapered roller bearing that can reduce the resistance and thereby reduce the 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） 内輪と外輪との間に複数の円すいころが略円すい筒状の保持器を介して周方向に転動可能に配設される円すいころ軸受であって、保持器に内輪の外周面と平行な平行面を設けると共に、この平行面の内輪の外周面に沿う幅寸法を保持器の肉厚より大きくして、平行面と内輪の外周面との間にラビリンスシール部を形成することを特徴とする円すいころ軸受。
（２） 保持器の小径側端部から軸方向外方に筒部を延設して、この筒部の内周面を平行面とすると共に、筒部と内輪の小径側のつば部との間にラビリンスシール部を形成す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) A tapered roller bearing in which a plurality of tapered rollers are disposed between an inner ring and an outer ring so as to be able to roll in a circumferential direction via a substantially tapered cylindrical cage, and the outer circumferential surface of the inner ring is disposed on the cage. A labyrinth seal portion is formed between the parallel surface and the outer peripheral surface of the inner ring by making the width dimension of the parallel surface along the outer peripheral surface of the inner ring larger than the thickness of the cage. Tapered roller bearing characterized by
(2) A cylindrical portion is extended axially outward from the small-diameter end of the cage, and the inner peripheral surface of the cylindrical portion is a parallel surface, and the cylindrical portion and the flange portion on the small-diameter side of the inner ring The tapered roller bearing according to (1), wherein a labyrinth seal portion is formed therebetween.

本発明の円すいころ軸受によれば、保持器に内輪の外周面と平行な平行面を設けると共に、この平行面の内輪の外周面に沿う幅寸法を保持器の肉厚より大きくして、平行面と内輪の外周面との間にラビリンスシール部を形成するため、保持器側の平行面と内輪の外周面との間で十分なラビリンスシール部の長さを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   According to the tapered roller bearing of the present invention, the cage is provided with a parallel surface parallel to the outer peripheral surface of the inner ring, and the width of the parallel surface along the outer peripheral surface of the inner ring is made larger than the thickness of the cage, Since the labyrinth seal portion is formed between the surface and the outer peripheral surface of the inner ring, a sufficient length of the labyrinth seal portion can be ensured between the parallel surface on the cage side and the outer peripheral surface of the inner ring. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the 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である。 (First embodiment)
First, a first embodiment of a tapered roller bearing according to the present invention will be described with reference to FIG.
FIG. 1 is a sectional view of an essential part for explaining a tapered roller bearing according to a first embodiment of the present invention.

本実施形態の円すいころ軸受１０は、図１に示すように、内輪１１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器１４を介して周方向に転動可能に配設されている。   As shown in FIG. 1, the tapered roller bearing 10 of the present embodiment is configured such that a plurality of tapered rollers 13 can roll in the circumferential direction between the inner ring 11 and the outer ring 12 via a substantially tapered cylindrical retainer 14. It is arranged.

内輪１１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成され、小径側端部に円すいころ１３の軸方向移動を規制する小つば部１５ｂが形成されている。また、小つば部１５ｂの軸方向外側の内輪１１の外周面には、小つば部１５ｂより小径の円筒面１６が形成されている。   The inner ring 11 is formed with a large collar portion 15a for guiding the large diameter side end face of the tapered roller 13 at the large diameter side end portion, and a small collar portion 15b for restricting axial movement of the tapered roller 13 at the small diameter side end portion. Is formed. A cylindrical surface 16 having a smaller diameter than the small collar portion 15b is formed on the outer peripheral surface of the inner ring 11 on the outer side in the axial direction of the small collar portion 15b.

保持器１４には、小径側端部から径方向内方に延びる環状部１７ａと、この環状部１７ａの内周縁部から軸方向外方に延びる円筒部（筒部）１７ｂと、が形成されており、この円筒部１７ｂの内周面が内輪１１の円筒面１６と平行な平行面（円筒面１６から所定距離はなれた面）１８とされている。そして、平行面１８と内輪１１の円筒面１６との間にラビリンスシール部１９ａを形成すると共に、円筒部１７ｂの軸方向内端部と内輪１１の小つば部１５ｂとの間にラビリンスシール部１９ｂを形成している。   The retainer 14 is formed with an annular portion 17a extending radially inward from the small-diameter end and a cylindrical portion (tubular portion) 17b extending axially outward from the inner peripheral edge of the annular portion 17a. The inner peripheral surface of the cylindrical portion 17 b is a parallel surface 18 (a surface separated from the cylindrical surface 16 by a predetermined distance) 18 parallel to the cylindrical surface 16 of the inner ring 11. A labyrinth seal portion 19a is formed between the parallel surface 18 and the cylindrical surface 16 of the inner ring 11, and a labyrinth seal portion 19b is formed between the axially inner end portion of the cylindrical portion 17b and the small collar portion 15b of the inner ring 11. Is forming.

従って、本実施形態の円すいころ軸受１０によれば、保持器１４の小径側端部から径方向内方に延びる環状部１７ａの内周縁部から軸方向外方に延びる円筒部１７ｂを形成して、この円筒部１７ｂの内周面を内輪１１の円筒面１６と平行な平行面１８とすると共に、この平行面１８と内輪１１の円筒面１６との間にラビリンスシール部１９ａを形成するため、保持器１４側の平行面１８と内輪１１の円筒面１６との間で保持器肉厚より長い十分な長さのラビリンスシール部１９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 10 of the present embodiment, the cylindrical portion 17b extending axially outward from the inner peripheral edge portion of the annular portion 17a extending radially inward from the small diameter side end portion of the cage 14 is formed. The inner circumferential surface of the cylindrical portion 17b is a parallel surface 18 parallel to the cylindrical surface 16 of the inner ring 11, and a labyrinth seal portion 19a is formed between the parallel surface 18 and the cylindrical surface 16 of the inner ring 11. A labyrinth seal portion 19a having a sufficient length longer than the cage thickness can be ensured between the parallel surface 18 on the cage 14 side and the cylindrical surface 16 of the inner ring 11. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受１０によれば、保持器１４の円筒部１７ｂの軸方向内端部と内輪１１の小つば部１５ｂとの間にラビリンスシール部１９ｂを形成するため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。   Further, according to the tapered roller bearing 10 of the present embodiment, the labyrinth seal portion 19b is formed between the axially inner end portion of the cylindrical portion 17b of the cage 14 and the small flange portion 15b of the inner ring 11, so The oil inflow amount can be further reduced, and the stirring resistance of the inflow oil can be further reduced.

（第２実施形態）
次に、図２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２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である。 (Second Embodiment)
Next, a second embodiment of the tapered roller bearing according to the present invention will be described with reference to FIG. In addition, about the same or equivalent part as 1st Embodiment, the same code | symbol is attached | subjected to drawing, and the description is abbreviate | omitted or simplified.
FIG. 2 is a cross-sectional view of a main part for explaining a second embodiment of the tapered roller bearing according to the present invention.

本実施形態の円すいころ軸受２０は、図２に示すように、内輪２１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器２４を介して周方向に転動可能に配設されている。   As shown in FIG. 2, the tapered roller bearing 20 according to the present embodiment allows a plurality of tapered rollers 13 to roll in a circumferential direction via a substantially tapered cylindrical cage 24 between an inner ring 21 and an outer ring 12. It is arranged.

内輪２１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成され、小径側端部に円すいころ１３の軸方向移動を規制する小つば部１５ｂが形成されている。また、小つば部１５ｂの軸方向外側の内輪２１の外周面には、小つば部１５ｂの根元部から軸方向外方に向けて次第に拡径する円すい面２６が形成されている。   The inner ring 21 has a large collar portion 15a for guiding the large diameter side end surface of the tapered roller 13 at the large diameter side end portion, and a small collar portion 15b for restricting axial movement of the tapered roller 13 at the small diameter side end portion. Is formed. Further, a conical surface 26 is formed on the outer peripheral surface of the inner ring 21 on the outer side in the axial direction of the small brim portion 15b. The conical surface 26 gradually increases in diameter from the root portion of the small brim portion 15b toward the axial direction.

保持器２４には、小径側端部から径方向内方に延びる環状部２７ａと、この環状部２７ａの内周縁部から軸方向外方に向けて次第に拡径する円すい筒部（筒部）２７ｂと、が形成されており、この円すい筒部２７ｂの内周面が内輪２１の円すい面２６と平行な平行面２８とされている。そして、平行面２８と内輪２１の円すい面２６との間にラビリンスシール部２９ａを形成すると共に、円すい筒部２７ｂの軸方向内端部と内輪２１の小つば部１５ｂとの間にラビリンスシール部２９ｂを形成している。   The retainer 24 includes an annular portion 27a extending radially inward from the small-diameter side end portion, and a conical cylinder portion (cylinder portion) 27b that gradually increases in diameter from the inner peripheral edge portion of the annular portion 27a toward the axially outward direction. The inner peripheral surface of the conical cylinder portion 27b is a parallel surface 28 parallel to the conical surface 26 of the inner ring 21. A labyrinth seal portion 29 a is formed between the parallel surface 28 and the conical surface 26 of the inner ring 21, and a labyrinth seal portion is formed between the axial inner end of the conical cylinder portion 27 b and the small flange portion 15 b of the inner ring 21. 29b is formed.

従って、本実施形態の円すいころ軸受２０によれば、保持器２４の小径側端部から径方向内方に延びる環状部２７ａの内周縁部から軸方向外方に向けて次第に拡径する円すい筒部２７ｂを形成して、この円すい筒部２７ｂの内周面を内輪２１の円すい面２６と平行な平行面２８とすると共に、この平行面２８と内輪２１の円すい面２６との間にラビリンスシール部２９ａを形成するため、保持器２４側の平行面２８と内輪２１の円すい面２６との間で保持器肉厚より長い十分な長さのラビリンスシール部２９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 20 of the present embodiment, the tapered cylinder gradually increases in diameter from the inner peripheral edge portion of the annular portion 27a extending radially inward from the end portion on the small diameter side of the retainer 24 toward the outer side in the axial direction. A portion 27 b is formed so that the inner peripheral surface of the conical cylinder portion 27 b is a parallel surface 28 parallel to the conical surface 26 of the inner ring 21, and a labyrinth seal is formed between the parallel surface 28 and the conical surface 26 of the inner ring 21. Since the portion 29a is formed, the labyrinth seal portion 29a having a sufficient length longer than the cage thickness can be secured between the parallel surface 28 on the cage 24 side and the conical surface 26 of the inner ring 21. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受２０によれば、保持器２４の円すい筒部２７ｂの軸方向内端部と内輪２１の小つば部１５ｂとの間にラビリンスシール部２９ｂを形成するため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。   Further, according to the tapered roller bearing 20 of the present embodiment, the labyrinth seal portion 29b is formed between the axially inner end portion of the tapered cylindrical portion 27b of the cage 24 and the small collar portion 15b of the inner ring 21, so that the bearing The amount of oil flowing in can be further reduced, and the stirring resistance of the inflowing oil can be further reduced.

さらに、本実施形態の円すいころ軸受２０によれば、内輪２１の端部外周面に設けた円すい面２６が、内輪回転により軸受外側へのオイルの流れを形成する機能を有するため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。
その他の構成及び作用効果については、上記第１実施形態と同様である。 Furthermore, according to the tapered roller bearing 20 of the present embodiment, the tapered surface 26 provided on the outer peripheral surface of the end portion of the inner ring 21 has a function of forming an oil flow to the outside of the bearing by rotating the inner ring. The oil inflow amount can be further reduced, and the stirring resistance of the inflow oil can be further reduced.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

（第３実施形態）
次に、図３を参照して、本発明に係る円すいころ軸受の第３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３は本発明に係る円すいころ軸受の第３実施形態を説明するための要部断面図である。 (Third embodiment)
Next, a third embodiment of the tapered roller bearing according to the present invention will be described with reference to FIG. In addition, about the same or equivalent part as 1st Embodiment, the same code | symbol is attached | subjected to drawing, and the description is abbreviate | omitted or simplified.
FIG. 3 is a sectional view of an essential part for explaining a tapered roller bearing according to a third embodiment of the present invention.

本実施形態の円すいころ軸受３０は、図３に示すように、内輪１１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器３４を介して周方向に転動可能に配設されている。   As shown in FIG. 3, the tapered roller bearing 30 according to the present embodiment allows a plurality of tapered rollers 13 to roll between the inner ring 11 and the outer ring 12 in the circumferential direction via a substantially tapered cylindrical retainer 34. It is arranged.

内輪１１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成され、小径側端部に円すいころ１３の軸方向移動を規制する小つば部１５ｂが形成されている。また、小つば部１５ｂの軸方向外側の内輪１１の外周面には、小つば部１５ｂより小径の円筒面１６が形成されている。   The inner ring 11 is formed with a large collar portion 15a for guiding the large diameter side end face of the tapered roller 13 at the large diameter side end portion, and a small collar portion 15b for restricting axial movement of the tapered roller 13 at the small diameter side end portion. Is formed. A cylindrical surface 16 having a smaller diameter than the small collar portion 15b is formed on the outer peripheral surface of the inner ring 11 on the outer side in the axial direction of the small collar portion 15b.

保持器３４には、小径側端部から軸方向外方に延びる円筒部３７ａと、この円筒部３７ａの軸方向外端部から径方向外方に延びて軸受の端部開口を覆う環状部３７ｂと、が形成されており、円筒部３７ａの内周面が内輪１１の円筒面１６と平行な平行面３８とされている。そして、平行面３８と内輪１１の円筒面１６との間にラビリンスシール部３９ａを形成している。   The cage 34 includes a cylindrical portion 37a extending axially outward from the small-diameter side end, and an annular portion 37b extending radially outward from the axial outer end of the cylindrical portion 37a and covering the end opening of the bearing. The inner peripheral surface of the cylindrical portion 37a is a parallel surface 38 parallel to the cylindrical surface 16 of the inner ring 11. A labyrinth seal portion 39 a is formed between the parallel surface 38 and the cylindrical surface 16 of the inner ring 11.

従って、本実施形態の円すいころ軸受３０によれば、保持器３４の小径側端部から軸方向外方に延びる円筒部３７ａを形成して、この円筒部３７ａの内周面を内輪１１の円筒面１６と平行な平行面３８とすると共に、この平行面３８と内輪１１の円筒面１６との間にラビリンスシール部３９ａを形成するため、保持器３４側の平行面３８と内輪１１の円筒面１６との間で保持器肉厚より長い十分な長さのラビリンスシール部３９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 30 of the present embodiment, the cylindrical portion 37a extending axially outward from the small diameter side end portion of the cage 34 is formed, and the inner peripheral surface of the cylindrical portion 37a is the cylinder of the inner ring 11. In order to form a parallel surface 38 parallel to the surface 16 and to form a labyrinth seal portion 39a between the parallel surface 38 and the cylindrical surface 16 of the inner ring 11, the parallel surface 38 on the cage 34 side and the cylindrical surface of the inner ring 11 are formed. A sufficient labyrinth seal portion 39a longer than the cage thickness can be secured. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受３０によれば、保持器３４の環状部３７ｂが軸受の端部開口を覆うように配置されるため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。
その他の構成及び作用効果については、上記第１実施形態と同様である。 Further, according to the tapered roller bearing 30 of the present embodiment, the annular portion 37b of the retainer 34 is disposed so as to cover the end opening of the bearing, so that the amount of oil flowing into the bearing can be further reduced, The stirring resistance of the inflow oil can be further reduced.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

（第４実施形態）
次に、図４を参照して、本発明に係る円すいころ軸受の第４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４実施形態を説明するための要部断面図である。 (Fourth embodiment)
Next, a fourth embodiment of the tapered roller bearing according to the present invention will be described with reference to FIG. In addition, about the same or equivalent part as 1st Embodiment, the same code | symbol is attached | subjected to drawing, and the description is abbreviate | omitted or simplified.
FIG. 4 is a cross-sectional view of an essential part for explaining a tapered roller bearing according to a fourth embodiment of the present invention.

本実施形態の円すいころ軸受４０は、図４に示すように、内輪４１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器４４を介して周方向に転動可能に配設されている。   As shown in FIG. 4, the tapered roller bearing 40 according to the present embodiment allows a plurality of tapered rollers 13 to roll between the inner ring 41 and the outer ring 12 in the circumferential direction via a substantially tapered cylindrical retainer 44. It is arranged.

内輪４１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成されている。また、内輪４１には、内輪軌道面４１ａの大つば部１５ａから軸方向に離間する側の端部外周面に円筒面４６ａが形成され、この円筒面４６ａから軸方向に離間する側の端部外周面に円筒面４６ａより大径の小つば部４６ｂが形成されている。   The inner ring 41 is formed with a large collar portion 15a for guiding the large diameter side end face of the tapered roller 13 at the large diameter side end portion. Further, the inner ring 41 is formed with a cylindrical surface 46a on the outer peripheral surface of the end portion of the inner ring raceway surface 41a on the side separated in the axial direction from the large collar portion 15a, and the end portion on the side separated in the axial direction from the cylindrical surface 46a. A small flange portion 46b having a larger diameter than the cylindrical surface 46a is formed on the outer peripheral surface.

保持器４４には、小径側端部から軸方向外方に延びる円筒部４７ａと、この円筒部４７ａの軸方向外端部から径方向外方に延びて軸受の端部開口を覆う環状部４７ｂと、が形成されており、円筒部４７ａの内周面が内輪４１の円筒面４６ａと平行な平行面４８とされている。そして、平行面４８と内輪４１の円筒面４６ａとの間にラビリンスシール部４９ａを形成すると共に、円筒部４７ａの軸方向外端部と内輪４１の小つば部４６ｂとの間にラビリンスシール部４９ｂを形成している。   The cage 44 includes a cylindrical portion 47a that extends axially outward from the small-diameter side end portion, and an annular portion 47b that extends radially outward from the axially outer end portion of the cylindrical portion 47a and covers the end opening of the bearing. The inner peripheral surface of the cylindrical portion 47a is a parallel surface 48 parallel to the cylindrical surface 46a of the inner ring 41. A labyrinth seal portion 49a is formed between the parallel surface 48 and the cylindrical surface 46a of the inner ring 41, and a labyrinth seal portion 49b is formed between the axially outer end of the cylindrical portion 47a and the small flange portion 46b of the inner ring 41. Is forming.

従って、本実施形態の円すいころ軸受４０によれば、保持器４４の小径側端部から軸方向外方に延びる円筒部４７ａを形成して、この円筒部４７ａの内周面を内輪４１の円筒面４６ａと平行な平行面４８とすると共に、この平行面４８と内輪４１の円筒面４６ａとの間にラビリンスシール部４９ａを形成するため、保持器４４側の平行面４８と内輪４１の円筒面４６ａとの間で保持器肉厚より長い十分な長さのラビリンスシール部４９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 40 of the present embodiment, the cylindrical portion 47a extending axially outward from the small-diameter side end portion of the cage 44 is formed, and the inner peripheral surface of the cylindrical portion 47a is the cylinder of the inner ring 41. Since the labyrinth seal portion 49a is formed between the parallel surface 48 parallel to the surface 46a and the cylindrical surface 46a of the inner ring 41, the parallel surface 48 on the cage 44 side and the cylindrical surface of the inner ring 41 are formed. A sufficient labyrinth seal portion 49a longer than the thickness of the cage can be secured with respect to 46a. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受４０によれば、保持器４４の円筒部４７ａの軸方向外端部と内輪４１の小つば部４６ｂとの間にラビリンスシール部４９ｂを形成するため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。   Further, according to the tapered roller bearing 40 of the present embodiment, the labyrinth seal portion 49b is formed between the axially outer end portion of the cylindrical portion 47a of the retainer 44 and the small flange portion 46b of the inner ring 41. The oil inflow amount can be further reduced, and the stirring resistance of the inflow oil can be further reduced.

さらに、本実施形態の円すいころ軸受４０によれば、保持器４４の環状部４７ｂが軸受の端部開口を覆うように配置されるため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。
その他の構成及び作用効果については、上記第１実施形態と同様である。 Furthermore, according to the tapered roller bearing 40 of the present embodiment, the annular portion 47b of the cage 44 is arranged so as to cover the end opening of the bearing, so that the amount of oil flowing into the bearing can be further reduced, The stirring resistance of the inflow oil can be further reduced.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

（第５実施形態）
次に、図５を参照して、本発明に係る円すいころ軸受の第５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５は本発明に係る円すいころ軸受の第５実施形態を説明するための要部断面図である。 (Fifth embodiment)
Next, a fifth embodiment of the tapered roller bearing according to the present invention will be described with reference to FIG. In addition, about the same or equivalent part as 1st Embodiment, the same code | symbol is attached | subjected to drawing, and the description is abbreviate | omitted or simplified.
FIG. 5 is a cross-sectional view of an essential part for explaining a tapered roller bearing according to a fifth embodiment of the present invention.

本実施形態の円すいころ軸受５０は、図５に示すように、内輪５１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器５４を介して周方向に転動可能に配設されている。   As shown in FIG. 5, the tapered roller bearing 50 according to the present embodiment allows a plurality of tapered rollers 13 to roll between the inner ring 51 and the outer ring 12 in the circumferential direction via a substantially tapered cylindrical retainer 54. It is arranged.

内輪５１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成されている。また、内輪５１には、内輪軌道面５１ａの大つば部１５ａから軸方向に離間する側の端部外周面に軸方向外方に向けて次第に拡径する円すい面５６が形成されている。   The inner ring 51 is formed with a large collar portion 15a for guiding the large diameter side end surface of the tapered roller 13 at the large diameter side end portion. Further, the inner ring 51 is formed with a conical surface 56 that gradually increases in diameter outward in the axial direction on the outer peripheral surface of the end portion of the inner ring raceway surface 51a on the side separated from the large brim portion 15a in the axial direction.

保持器５４には、小径側端部から軸方向外方に向けて次第に拡径する円すい筒部（筒部）５７ａと、この円すい筒部５７ａの軸方向外端部から径方向外方に延びる環状部５７ｂと、が形成されており、この円すい筒部５７ａの内周面が内輪５１の円すい面５６と平行な平行面５８とされている。そして、平行面５８と内輪５１の円すい面５６との間にラビリンスシール部５９ａを形成している。   The cage 54 has a conical cylinder part (cylinder part) 57a that gradually expands in the axial direction from the small diameter side end part, and extends radially outward from the axially outer end part of the conical cylinder part 57a. An annular portion 57 b is formed, and an inner peripheral surface of the conical cylinder portion 57 a is a parallel surface 58 parallel to the conical surface 56 of the inner ring 51. A labyrinth seal portion 59 a is formed between the parallel surface 58 and the conical surface 56 of the inner ring 51.

従って、本実施形態の円すいころ軸受５０によれば、保持器５４の小径側端部から軸方向外方に向けて次第に拡径する円すい筒部５７ａを形成して、この円すい筒部５７ａの内周面を内輪５１の円すい面５６と平行な平行面５８とすると共に、この平行面５８と内輪５１の円すい面５６との間にラビリンスシール部５９ａを形成するため、保持器５４側の平行面５８と内輪５１の円すい面５６との間で保持器肉厚より長い十分な長さのラビリンスシール部５９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 50 of the present embodiment, the tapered cylindrical portion 57a that gradually increases in diameter from the small diameter side end portion of the cage 54 toward the outer side in the axial direction is formed, and the inside of the tapered cylindrical portion 57a Since the peripheral surface is a parallel surface 58 parallel to the conical surface 56 of the inner ring 51 and a labyrinth seal portion 59a is formed between the parallel surface 58 and the conical surface 56 of the inner ring 51, the parallel surface on the cage 54 side is formed. A labyrinth seal portion 59a having a sufficient length longer than the cage thickness can be ensured between 58 and the conical surface 56 of the inner ring 51. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受５０によれば、保持器５４の環状部５７ｂが軸受の端部開口を覆うように配置されるため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。
その他の構成及び作用効果については、上記第１実施形態と同様である。 Further, according to the tapered roller bearing 50 of the present embodiment, the annular portion 57b of the cage 54 is disposed so as to cover the end opening of the bearing, so that the amount of oil flowing into the bearing can be further reduced, The stirring resistance of the inflow oil can be further reduced.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

（第６実施形態）
次に、図６を参照して、本発明に係る円すいころ軸受の第６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６は本発明に係る円すいころ軸受の第６実施形態を説明するための要部断面図である。 (Sixth embodiment)
Next, a sixth embodiment of the tapered roller bearing according to the present invention will be described with reference to FIG. In addition, about the same or equivalent part as 1st Embodiment, the same code | symbol is attached | subjected to drawing, and the description is abbreviate | omitted or simplified.
FIG. 6 is a cross-sectional view of an essential part for explaining a tapered roller bearing according to a sixth embodiment of the present invention.

本実施形態の円すいころ軸受６０は、図６に示すように、内輪１１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器６４を介して周方向に転動可能に配設されている。   As shown in FIG. 6, the tapered roller bearing 60 of the present embodiment allows a plurality of tapered rollers 13 to roll between the inner ring 11 and the outer ring 12 in the circumferential direction via a substantially tapered cylindrical retainer 64. It is arranged.

内輪１１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成され、小径側端部に円すいころ１３の軸方向移動を規制する小つば部１５ｂが形成されている。また、小つば部１５ｂの軸方向外側の内輪１１の外周面には、小つば部１５ｂより小径の円筒面１６が形成されている。   The inner ring 11 is formed with a large collar portion 15a for guiding the large diameter side end face of the tapered roller 13 at the large diameter side end portion, and a small collar portion 15b for restricting axial movement of the tapered roller 13 at the small diameter side end portion. Is formed. A cylindrical surface 16 having a smaller diameter than the small collar portion 15b is formed on the outer peripheral surface of the inner ring 11 on the outer side in the axial direction of the small collar portion 15b.

保持器６４には、小径側端部から軸方向外方に延びる大径円筒部６７ａと、この大径円筒部６７ａの軸方向外端部から径方向内方に延びて軸受の端部開口を覆う環状部６７ｂと、この環状部６７ｂの内周縁部から軸方向内方に延びる小径円筒部６７ｃと、が形成されており、この小径円筒部６７ｃの内周面が内輪１１の円筒面１６と平行な平行面６８とされている。そして、平行面６８と内輪１１の円筒面１６との間にラビリンスシール部６９ａを形成している。   The cage 64 has a large-diameter cylindrical portion 67a extending axially outward from the small-diameter side end portion, and an end opening of the bearing extending radially inward from the axially outer end portion of the large-diameter cylindrical portion 67a. An annular portion 67b to be covered and a small diameter cylindrical portion 67c extending inward in the axial direction from the inner peripheral edge portion of the annular portion 67b are formed. The inner peripheral surface of the small diameter cylindrical portion 67c is the cylindrical surface 16 of the inner ring 11. Parallel planes 68 are formed. A labyrinth seal portion 69 a is formed between the parallel surface 68 and the cylindrical surface 16 of the inner ring 11.

従って、本実施形態の円すいころ軸受６０によれば、保持器６４の環状部６７ｂの内周縁部から軸方向内方に延びる小径円筒部６７ｃを形成して、この小径円筒部６７ｃの内周面を内輪1 １の円筒面１６と平行な平行面６８とすると共に、この平行面６８と内輪１１の円筒面１６との間にラビリンスシール部６９ａを形成するため、保持器６４側の平行面６８と内輪１１の円筒面１６との間で保持器肉厚より長い十分な長さのラビリンスシール部６９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 60 of the present embodiment, the small diameter cylindrical portion 67c extending inward in the axial direction from the inner peripheral edge portion of the annular portion 67b of the cage 64 is formed, and the inner peripheral surface of the small diameter cylindrical portion 67c. Is a parallel surface 68 parallel to the cylindrical surface 16 of the inner ring 11, and a labyrinth seal portion 69 a is formed between the parallel surface 68 and the cylindrical surface 16 of the inner ring 11. A labyrinth seal part 69a having a sufficient length longer than the cage thickness can be secured between the inner ring 11 and the cylindrical surface 16 of the inner ring 11. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受６０によれば、保持器６４の環状部６７ｂが軸受の端部開口を覆うように配置されるため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。
その他の構成及び作用効果については、上記第１実施形態と同様である。 Further, according to the tapered roller bearing 60 of the present embodiment, the annular portion 67b of the cage 64 is disposed so as to cover the end opening of the bearing, so that the amount of oil flowing into the bearing can be further reduced, The stirring resistance of the inflow oil can be further reduced.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

（第７実施形態）
次に、図７を参照して、本発明に係る円すいころ軸受の第７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７は本発明に係る円すいころ軸受の第７実施形態を説明するための要部断面図である。 (Seventh embodiment)
Next, a seventh embodiment of the tapered roller bearing according to the present invention will be described with reference to FIG. In addition, about the same or equivalent part as 1st Embodiment, the same code | symbol is attached | subjected to drawing, and the description is abbreviate | omitted or simplified.
FIG. 7 is a cross-sectional view of an essential part for explaining a seventh embodiment of the tapered roller bearing according to the present invention.

本実施形態の円すいころ軸受７０は、図７に示すように、内輪７１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器７４を介して周方向に転動可能に配設されている。   As shown in FIG. 7, the tapered roller bearing 70 according to the present embodiment allows a plurality of tapered rollers 13 to roll in a circumferential direction via a substantially tapered cylindrical retainer 74 between an inner ring 71 and an outer ring 12. It is arranged.

内輪７１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成され、小径側端部に円すいころ１３の軸方向移動を規制する小つば部１５ｂが形成されている。また、小つば部１５ｂの軸方向外側の内輪７１の外周面には小つば部１５ｂより小径の円筒面７６ａが形成され、この円筒面７６ａの軸方向外側の内輪７１の外周面には円筒面７６ａより小径の円筒面７６ｂが形成されている。   The inner ring 71 is formed with a large collar portion 15a for guiding the large diameter side end surface of the tapered roller 13 at the large diameter side end portion, and a small collar portion 15b for restricting axial movement of the tapered roller 13 at the small diameter side end portion. Is formed. Further, a cylindrical surface 76a having a diameter smaller than that of the small collar portion 15b is formed on the outer circumferential surface of the inner ring 71 on the axially outer side of the small collar portion 15b, and a cylindrical surface is formed on the outer circumferential surface of the inner ring 71 on the axially outer side of the cylindrical surface 76a. A cylindrical surface 76b having a diameter smaller than that of 76a is formed.

保持器７４には、小径側端部から軸方向外方に延びる大径円筒部７７ａと、この大径円筒部７７ａの軸方向外端部から径方向内方に延びて軸受の端部開口を覆う環状部７７ｂと、環状部７７ｂの内周縁部から軸方向内方に延びる小径円筒部７７ｃと、が形成されており、この小径円筒部７７ｃの内周面が内輪７１の円筒面７６ｂと平行な平行面７８とされている。そして、平行面７８と内輪７１の円筒面７６ｂとの間にラビリンスシール部７９ａを形成すると共に、小径円筒部７７ｃの軸方向内端部と、内輪７１の円筒面７６ａと円筒面７６ｂとの段部との間にラビリンスシール部７９ｂを形成している。   The cage 74 has a large-diameter cylindrical portion 77a extending axially outward from the small-diameter side end portion, and an end opening of the bearing extending radially inward from the axially outer end portion of the large-diameter cylindrical portion 77a. An annular portion 77b to be covered and a small diameter cylindrical portion 77c extending inward in the axial direction from the inner peripheral edge of the annular portion 77b are formed, and the inner peripheral surface of the small diameter cylindrical portion 77c is parallel to the cylindrical surface 76b of the inner ring 71. A parallel plane 78 is formed. Then, a labyrinth seal portion 79a is formed between the parallel surface 78 and the cylindrical surface 76b of the inner ring 71, a step between the axially inner end of the small diameter cylindrical portion 77c, and the cylindrical surface 76a and the cylindrical surface 76b of the inner ring 71. A labyrinth seal portion 79b is formed between the two portions.

従って、本実施形態の円すいころ軸受７０によれば、保持器７４の環状部７７ｂの内周縁部から軸方向内方に延びる小径円筒部７７ｃを形成して、この小径円筒部７７ｃの内周面を内輪７１の円筒面７６ｂと平行な平行面７８とすると共に、この平行面７８と内輪７１の円筒面７６ｂとの間にラビリンスシール部７９ａを形成するため、保持器７４側の平行面７８と内輪７１の円筒面７６ｂとの間で保持器肉厚より長い十分な長さのラビリンスシール部７９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 70 of the present embodiment, the small diameter cylindrical portion 77c extending inward in the axial direction from the inner peripheral edge portion of the annular portion 77b of the cage 74 is formed, and the inner peripheral surface of the small diameter cylindrical portion 77c. Is formed as a parallel surface 78 parallel to the cylindrical surface 76b of the inner ring 71, and a labyrinth seal portion 79a is formed between the parallel surface 78 and the cylindrical surface 76b of the inner ring 71. A sufficient labyrinth seal portion 79a longer than the cage thickness can be secured between the inner ring 71 and the cylindrical surface 76b. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受７０によれば、保持器７４の小径円筒部７７ｃの軸方向内端部と、内輪７１の円筒面７６ａと円筒面７６ｂとの段部との間にラビリンスシール部７９ｂを形成するため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。   Further, according to the tapered roller bearing 70 of the present embodiment, a labyrinth seal is provided between the axially inner end portion of the small diameter cylindrical portion 77c of the retainer 74 and the step portion between the cylindrical surface 76a and the cylindrical surface 76b of the inner ring 71. Since the portion 79b is formed, the amount of oil flowing into the bearing can be further reduced, and the stirring resistance of the inflowing oil can be further reduced.

さらに、本実施形態の円すいころ軸受７０によれば、保持器７４の環状部７７ｂが軸受の端部開口を覆うように配置されるため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。
その他の構成及び作用効果については、上記第１実施形態と同様である。 Furthermore, according to the tapered roller bearing 70 of the present embodiment, the annular portion 77b of the cage 74 is arranged so as to cover the end opening of the bearing, so that the amount of oil flowing into the bearing can be further reduced, The stirring resistance of the inflow oil can be further reduced.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

（第８実施形態）
次に、図８を参照して、本発明に係る円すいころ軸受の第８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８は本発明に係る円すいころ軸受の第８実施形態を説明するための要部断面図である。 (Eighth embodiment)
Next, an eighth embodiment of the tapered roller bearing according to the present invention will be described with reference to FIG. In addition, about the same or equivalent part as 1st Embodiment, the same code | symbol is attached | subjected to drawing, and the description is abbreviate | omitted or simplified.
FIG. 8 is a sectional view of an essential part for explaining an eighth embodiment of the tapered roller bearing according to the present invention.

本実施形態の円すいころ軸受８０は、図８に示すように、内輪８１と外輪１２との間に複数の円すいころ１３が略円すい筒状の保持器８４を介して周方向に転動可能に配設されている。   As shown in FIG. 8, the tapered roller bearing 80 according to the present embodiment allows a plurality of tapered rollers 13 to roll between the inner ring 81 and the outer ring 12 in the circumferential direction via a substantially tapered cylindrical retainer 84. It is arranged.

内輪８１には、大径側端部に円すいころ１３の大径側端面を案内する大つば部１５ａが形成されている。また、内輪８１には、内輪軌道面８１ａの大つば部１５ａから軸方向に離間する側の端部外周面に円筒面８６ａが形成され、この円筒面８６ａから軸方向に離間する側の端部外周面に円筒面８６ａより大径の小つば部８６ｂが形成されている。   The inner ring 81 is formed with a large flange portion 15 a that guides the large diameter side end surface of the tapered roller 13 at the large diameter side end portion. The inner ring 81 is formed with a cylindrical surface 86a on the outer peripheral surface of the end portion of the inner ring raceway surface 81a on the side separated in the axial direction from the large collar portion 15a, and the end portion on the side separated in the axial direction from the cylindrical surface 86a. A small flange portion 86b having a larger diameter than the cylindrical surface 86a is formed on the outer peripheral surface.

保持器８４には、小径側端部から径方向内方に延びて軸受の端部開口を覆う環状部８７ａと、この環状部８７ａの内周縁部から軸方向外方に延びる円筒部８７ｂと、が形成されており、この円筒部８７ｂの内周面が内輪８１の円筒面８６ａと平行な平行面８８とされている。そして、平行面８８と内輪８１の円筒面８６ａとの間にラビリンスシール部８９ａを形成すると共に、円筒部８７ｂの軸方向外端部と内輪８１の小つば部８６ｂとの間にラビリンスシール部８９ｂを形成している。   The retainer 84 includes an annular portion 87a that extends radially inward from the end portion on the small diameter side to cover the end opening of the bearing, a cylindrical portion 87b that extends axially outward from the inner peripheral edge of the annular portion 87a, The inner peripheral surface of the cylindrical portion 87 b is a parallel surface 88 that is parallel to the cylindrical surface 86 a of the inner ring 81. A labyrinth seal portion 89a is formed between the parallel surface 88 and the cylindrical surface 86a of the inner ring 81, and a labyrinth seal portion 89b is formed between the axially outer end portion of the cylindrical portion 87b and the small flange portion 86b of the inner ring 81. Is forming.

従って、本実施形態の円すいころ軸受８０によれば、保持器８４の小径側端部から径方向内方に延びて軸受の端部開口を覆う環状部８７ａの内周縁部から軸方向外方に延びる円筒部８７ｂを形成して、この円筒部８７ｂの内周面を内輪８１の円筒面８６ａと平行な平行面８８とすると共に、この平行面８８と内輪８１の円筒面８６ａとの間にラビリンスシール部８９ａを形成するため、保持器８４側の平行面８８と内輪８１の円筒面８６ａとの間で保持器肉厚より長い十分な長さのラビリンスシール部８９ａを確保することができる。これにより、軸受へのオイル流入量を低減して、流入オイルの攪拌抵抗を小さくすることができ、軸受の低トルク化を図ることができる。   Therefore, according to the tapered roller bearing 80 of the present embodiment, it extends axially outward from the inner peripheral edge of the annular portion 87a that extends radially inward from the small-diameter side end of the cage 84 and covers the end opening of the bearing. An extending cylindrical portion 87 b is formed, and an inner peripheral surface of the cylindrical portion 87 b is a parallel surface 88 parallel to the cylindrical surface 86 a of the inner ring 81, and a labyrinth is provided between the parallel surface 88 and the cylindrical surface 86 a of the inner ring 81. Since the seal portion 89a is formed, a labyrinth seal portion 89a having a sufficient length longer than the thickness of the cage can be secured between the parallel surface 88 on the cage 84 side and the cylindrical surface 86a of the inner ring 81. As a result, the amount of oil flowing into the bearing can be reduced, the stirring resistance of the flowing oil can be reduced, and the torque of the bearing can be reduced.

また、本実施形態の円すいころ軸受８０によれば、保持器８４の円筒部８７ｂの軸方向外端部と内輪８１の小つば部８６ｂとの間にラビリンスシール部８９ｂを形成するため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。   Further, according to the tapered roller bearing 80 of the present embodiment, the labyrinth seal portion 89b is formed between the axially outer end portion of the cylindrical portion 87b of the cage 84 and the small flange portion 86b of the inner ring 81. The oil inflow amount can be further reduced, and the stirring resistance of the inflow oil can be further reduced.

さらに、本実施形態の円すいころ軸受８０によれば、保持器８４の環状部８７ａが軸受の端部開口を覆うように配置されるため、軸受へのオイル流入量をさらに低減することができ、流入オイルの攪拌抵抗をさらに小さくすることができる。
その他の構成及び作用効果については、上記第１実施形態と同様である。 Furthermore, according to the tapered roller bearing 80 of the present embodiment, the annular portion 87a of the cage 84 is disposed so as to cover the end opening of the bearing, so that the amount of oil flowing into the bearing can be further reduced, The stirring resistance of the inflow oil can be further reduced.
About another structure and an effect, it is the same as that of the said 1st Embodiment.

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. 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. 本発明に係る円すいころ軸受の第３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 3rd Embodiment of the tapered roller bearing which concerns on this invention. 本発明に係る円すいころ軸受の第４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 4th Embodiment of the tapered roller bearing which concerns on this invention. 本発明に係る円すいころ軸受の第５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 5th Embodiment of the tapered roller bearing which concerns on this invention. 本発明に係る円すいころ軸受の第６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 6th Embodiment of the tapered roller bearing which concerns on this invention. 本発明に係る円すいころ軸受の第７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 7th Embodiment of the tapered roller bearing which concerns on this invention. 本発明に係る円すいころ軸受の第８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 8th Embodiment of the tapered roller bearing which concerns on this invention. 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 円すいころ軸受
１１ 内輪
１２ 外輪
１３ 円すいころ
１４ 保持器
１５ａ 大つば部
１５ｂ 小つば部
１６ 円筒面
１７ａ 環状部
１７ｂ 円筒部（筒部）
１８ 平行面
１９ａ，１９ｂ ラビリンスシール部 DESCRIPTION OF SYMBOLS 10 Tapered roller bearing 11 Inner ring 12 Outer ring 13 Tapered roller 14 Cage 15a Large brim part 15b Small brim part 16 Cylindrical surface 17a Annular part 17b Cylindrical part (cylinder part)
18 Parallel surface 19a, 19b Labyrinth seal part

Claims (2)

内輪と外輪との間に複数の円すいころが略円すい筒状の保持器を介して周方向に転動可能に配設される円すいころ軸受であって、
前記保持器に前記内輪の外周面と平行な平行面を設けると共に、前記平行面の前記内輪の外周面に沿う幅寸法を前記保持器の肉厚より大きくして、前記平行面と前記内輪の外周面との間にラビリンスシール部を形成することを特徴とする円すいころ軸受。 A tapered roller bearing in which a plurality of tapered rollers are disposed between an inner ring and an outer ring so as to be able to roll in a circumferential direction via a substantially tapered cylindrical cage,
The retainer is provided with a parallel surface parallel to the outer peripheral surface of the inner ring, and the width of the parallel surface along the outer peripheral surface of the inner ring is made larger than the thickness of the retainer so that the parallel surface and the inner ring A tapered roller bearing, wherein a labyrinth seal portion is formed between the outer peripheral surface and the outer peripheral surface. 前記保持器の小径側端部から軸方向外方に筒部を延設して、前記筒部の内周面を前記平行面とすると共に、前記筒部と前記内輪の小径側のつば部との間にラビリンスシール部を形成することを特徴とする請求項１記載の円すいころ軸受。   A cylindrical portion extends axially outward from the small-diameter side end of the cage, and the inner peripheral surface of the cylindrical portion is the parallel surface, and the cylindrical portion and a small-diameter-side collar portion of the inner ring, The tapered roller bearing according to claim 1, wherein a labyrinth seal portion is formed therebetween.
JP2006047208A 2006-02-23 2006-02-23 Tapered roller bearing Pending JP2007225037A (en)

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WO2015012214A1 (en) * 2013-07-22 2015-01-29 株式会社ジェイテクト Tapered roller bearing and power transmission device using tapered roller bearing
CN104565021A (en) * 2013-10-11 2015-04-29 株式会社捷太格特 Tapered 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

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WO2015012214A1 (en) * 2013-07-22 2015-01-29 株式会社ジェイテクト Tapered roller bearing and power transmission device using tapered roller bearing
CN105393007A (en) * 2013-07-22 2016-03-09 株式会社捷太格特 Tapered roller bearing and power transmission device using tapered roller bearing
CN104565021A (en) * 2013-10-11 2015-04-29 株式会社捷太格特 Tapered roller bearing
CN104565021B (en) * 2013-10-11 2018-04-17 株式会社捷太格特 Taper roll 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

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