JP3655133B2 - Bearing device for drive shaft - Google Patents

Bearing device for drive shaft Download PDF

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Publication number
JP3655133B2
JP3655133B2 JP22879899A JP22879899A JP3655133B2 JP 3655133 B2 JP3655133 B2 JP 3655133B2 JP 22879899 A JP22879899 A JP 22879899A JP 22879899 A JP22879899 A JP 22879899A JP 3655133 B2 JP3655133 B2 JP 3655133B2
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Japan
Prior art keywords
housing
drive shaft
sealing member
pinion
bearing
Prior art date
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Expired - Fee Related
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JP22879899A
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Japanese (ja)
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JP2001020949A (en
Inventor
邦彦 横田
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP22879899A priority Critical patent/JP3655133B2/en
Publication of JP2001020949A publication Critical patent/JP2001020949A/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
    • 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
    • F16C19/38—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 two or more rows of rollers
    • F16C19/383—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 two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—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 two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—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 two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • 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
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/581—Raceways; Race rings integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings

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

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば自動車などのディファレンシャル装置に動力を伝えるためのドライブシャフト用軸受装置に関する。
【０００２】
【従来の技術】
従来、この種のドライブシャフト用軸受装置として実開平５−９６５５１号公報に記載のものが知られている。このものは、軸部の一端にピニオンが設けられるとともに他端側に駆動軸がスプライン嵌合されるドライブシャフトをハウジングに回動自在に支持するため、ハウジングに支持固定される外輪と、ピニオンに嵌合される内輪と、内外輪間に配置される複数の円すいころを備えた複列円すいころ軸受が配置されている。そして、ピニオン側の軸受内部は開放され、反ピニオン側のハウジングと駆動軸間に密封部材が配置されている。
【０００３】
【発明が解決しようとする課題】
上記の従来例では、ピニオンおよびピニオンと噛合う図示しないリングギアと、軸受内部とが同じ潤滑油にて潤滑されるため、ギアの摩耗粉等の異物が軸受内部に侵入し、軸受寿命の低下の原因となることがある。
【０００４】
この問題を解消するため、特開平８−１０５４４９号公報にて、上記複列円すいころ軸受の外輪両端部にて内外輪間を密封する密封部材が配置されたドライブシャフト用軸受装置が提案されている。しかし、この従来装置においては、軸受内部が完全密封されているため、上記従来装置のような軸受内部へのギア摩耗粉等の異物の侵入が防止されるが、その代わり、軸受の回転に伴う軸受内部の内圧上昇により密封部材の密封性が低下して潤滑油洩れが生じることがあり、軸受の潤滑不足につながりやすい。さらに、軸受回転の停止時には、逆に軸受内部の内圧が低下し、密封部材のリップ吸い付き現象が生じると軸受トルクが大きくなるとともに、リップの異常摩耗の原因となることがある。
【０００５】
本発明は、上記する課題に対処するためになされたものであり、軸受内部への異物の侵入防止と、軸受内圧の変動による密封部材への影響を防止するドライブシャフト用軸受装置を提供することを目的としている。
【０００６】
【課題を解決するための手段】
この発明は上記課題を解消するためになされたものであり、軸部の一端にピニオンが設けられるとともに他端側に駆動軸がスプライン嵌合されるドライブシャフトを、ハウジングに回動自在に支持するドライブシャフト用軸受装置において、ハウジングに支持固定される外輪と、ピニオン軸に嵌合される内輪と、内外輪間に配置される複数の円すいころを備える２列の円すいころ軸受と、ピニオン側の内外輪間に配置される第１密封部材と、ハウジングと駆動軸間に配置される第２密封部材とを有するとともに、第１密封部材は、内外輪にそれぞれその円筒部同士が対向するよう断面Ｌ形金属環が嵌合固定され、外輪側の金属環に一体成形されたゴム等の弾性体の複数のリップが内輪側の金属環に摺接させられる構成であり、第２密封部材は、ハウジングに固定されるとともに、内周に形成された主リップおよび補助リップが駆動軸に摺接させられ、側面に形成された補助リップが防塵カバーに摺接させられる構成であり、反ピニオン側の円すいころおよび第２密封部材間のハウジング内部空間とハウジング外部空間とを連通するブリーザ穴をハウジングに設けていることを特徴とする。
【０００７】
【発明の実施の形態】
図１乃至図３は本発明の一実施形態であり、軸部１の一端に図示しないディファレンシャル装置のリングギアに噛み合いするピニオン２が設けられるとともに、他端側に駆動軸３がスプライン嵌合４されるドライブシャフトＤが、アルミニウム製ハウジング５に軸受６にて回動自在に支持されている。この軸受６は、複列円すいころ軸受であり、内径がその中央部から軸方向両端側へ向けて大きくなる一対のテーパ状軌道面６０ａ，６０ｂを有する一体形外輪６０と、それら各軌道面６０ａ，６０ｂに対向する軌道面６２ａ，６３ａを有しかつ小端面が当接されて止め輪６５で一体化された一対の内輪６２，６３と、内外輪６０，６２，６３間の軌道面６０ａ，６２ａ間および軌道面６０ｂ，６３ａ間に配置される複数の円すいころ６４，６４とを備え、外輪６０は、ハウジング５に嵌合されて外輪６０の一端に形成した径方向外向きフランジ６１をボルト６６でハウジング５に締結され、内輪６２，６３は、ピニオン軸１に嵌合されピニオン２端面部と駆動軸３端面部間に挾持固定されている。
【０００８】
また、駆動軸３外周面にはハウジング５外周面を一部覆う防塵カバー９が固定され、ピニオン２側の内外輪６３，６０間には第１密封部材７が配置されるとともに、ハウジング５と駆動軸３間には第２密封部材８が配置されている。この第１密封部材７は、詳細には図２に示すように、内、外輪６３，６０にそれぞれその円筒部７１ａ，７２ａ同志および径方向フランジ７１ｂ，７２ｂ同志が対向するよう断面Ｌ形金属環７１，７２が嵌合固定され、外輪６０側の金属環７１に一体成形されたゴム等の弾性体７３の複数のリップ７４が内輪６３側の金属環７２に摺接させられた構成である。さらに第２密封部材８は、詳細には図３に示すように、ハウジング５に固定されるとともに、内周に形成された主リップ８０および補助リップ８１が駆動軸３に摺接させられ、側面に形成された補助リップ８２が防塵カバー９に摺接させられた構成である。
【０００９】
さらに、ハウジング５には、上記第１および第２密封部材７，８間のハウジング５内部空間とハウジング５外部空間とを連通するブリーザ穴１０が形成され、軸受回転時および停止時の軸受内圧の変動を逃がし、軸受内圧を常に外圧とほぼ同一になるようにし、密封部材７，８への影響が極力解消するようにされている
【００１０】
【発明の効果】
本発明は、軸受部を完全密封したため軸受内部への異物の侵入が防止され、さらにハウジングに形成したブリーザ穴により、軸受回転時および回転から停止時の軸受内圧の変動を解消することにより、密封部材からの潤滑剤洩れや密封部材のリップ吸い付きによるリップ摩耗および回転トルクの増加が防止される。
【図面の簡単な説明】
【図１】本発明の一実施形態の半断面図である。
【図２】図１の第１密封部材の断面図である。
【図３】図１の第２密封部材の断面図である。
【符号の説明】
１ ピニオン軸
２ ピニオン
３ 駆動軸
４ スプライン嵌合
５ ハウジング
６ 複列円すいころ軸受
７ 第１密封部材
８ 第２密封部材
９ 防塵カバー
１０ ブリーザ穴
６０ 外輪
６２ 内輪
６３ 内輪
Ｄ ドライブシャフト[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drive shaft bearing device for transmitting power to a differential device such as an automobile.
[0002]
[Prior art]
Conventionally, a drive shaft bearing device described in Japanese Utility Model Laid-Open No. 5-96551 is known. This has a pinion provided at one end of the shaft portion and a drive shaft having a driveline spline-fitted on the other end side. The drive shaft is rotatably supported by the housing. A double row tapered roller bearing having a plurality of tapered rollers disposed between the inner ring to be fitted and the inner and outer rings is disposed. The inside of the pinion-side bearing is opened, and a sealing member is disposed between the housing on the anti-pinion side and the drive shaft.
[0003]
[Problems to be solved by the invention]
In the above conventional example, the pinion and the ring gear (not shown) that meshes with the pinion and the inside of the bearing are lubricated with the same lubricating oil, so that foreign matter such as gear wear powder enters the inside of the bearing, reducing the bearing life. It may cause.
[0004]
In order to solve this problem, Japanese Patent Application Laid-Open No. 8-105449 proposes a drive shaft bearing device in which sealing members for sealing between the inner and outer rings are arranged at both ends of the outer ring of the double row tapered roller bearing. Yes. However, in this conventional device, since the inside of the bearing is completely sealed, foreign matter such as gear wear powder is prevented from entering the inside of the bearing as in the above-mentioned conventional device, but instead, accompanying the rotation of the bearing. Due to an increase in internal pressure inside the bearing, the sealing performance of the sealing member may be reduced and lubricating oil leakage may occur, which tends to result in insufficient lubrication of the bearing. Further, when the bearing rotation is stopped, the internal pressure inside the bearing decreases, and if the phenomenon of lip sticking of the sealing member occurs, the bearing torque increases and may cause abnormal wear of the lip.
[0005]
The present invention has been made to cope with the above-described problems, and provides a drive shaft bearing device that prevents foreign matter from entering the bearing and prevents the seal member from being affected by fluctuations in the bearing internal pressure. It is an object.
[0006]
[Means for Solving the Problems]
The present invention has been made to solve the above-mentioned problems, and a drive shaft, in which a pinion is provided at one end of a shaft portion and a drive shaft is spline-fitted at the other end side, is rotatably supported by a housing. In a drive shaft bearing device, an outer ring supported and fixed to a housing, an inner ring fitted to a pinion shaft, two rows of tapered roller bearings having a plurality of tapered rollers disposed between the inner and outer rings, and a pinion side A first sealing member disposed between the inner and outer rings and a second sealing member disposed between the housing and the drive shaft , and the first sealing member has a cross section so that the cylindrical portions thereof face the inner and outer rings, respectively. An L-shaped metal ring is fitted and fixed, and a plurality of lips of an elastic body such as rubber integrally formed on the metal ring on the outer ring side are brought into sliding contact with the metal ring on the inner ring side, and the second sealing member is The main lip and auxiliary lip formed on the inner periphery are slidably contacted with the drive shaft, and the auxiliary lip formed on the side surface is slidably contacted with the dust-proof cover. A breather hole is provided in the housing for communicating the housing inner space and the housing outer space between the tapered roller and the second sealing member.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an embodiment of the present invention, in which one end of a shaft portion 1 is provided with a pinion 2 that meshes with a ring gear of a differential device (not shown), and a drive shaft 3 is spline fitted 4 on the other end side. A drive shaft D is rotatably supported by a bearing 6 on an aluminum housing 5. This bearing 6 is a double-row tapered roller bearing, and has an integral outer ring 60 having a pair of tapered raceway surfaces 60a and 60b whose inner diameter increases from the central portion toward both ends in the axial direction, and the respective raceway surfaces 60a. , 60b, and a pair of inner rings 62, 63 that are integrated with a retaining ring 65 by contacting the small end faces thereof, and raceway surfaces 60a between the inner and outer rings 60, 62, 63. 62a and a plurality of tapered rollers 64, 64 disposed between the raceway surfaces 60b, 63a. The outer ring 60 is bolted to the radially outward flange 61 that is fitted to the housing 5 and formed at one end of the outer ring 60. The inner rings 62 and 63 are fastened to the housing 5 at 66, and are fitted to the pinion shaft 1 and are clamped and fixed between the end surface portion of the pinion 2 and the end surface portion of the drive shaft 3.
[0008]
A dustproof cover 9 that covers a part of the outer peripheral surface of the housing 5 is fixed to the outer peripheral surface of the drive shaft 3, and a first sealing member 7 is disposed between the inner and outer rings 63, 60 on the pinion 2 side. A second sealing member 8 is disposed between the drive shafts 3. As shown in detail in FIG. 2, the first sealing member 7 has an L-shaped metal ring in cross section so that the cylindrical portions 71a and 72a and the radial flanges 71b and 72b are opposed to the inner and outer rings 63 and 60, respectively. 71 and 72 are fitted and fixed, and a plurality of lips 74 of an elastic body 73 such as rubber integrally formed on the metal ring 71 on the outer ring 60 side are brought into sliding contact with the metal ring 72 on the inner ring 63 side. Further, as shown in detail in FIG. 3, the second sealing member 8 is fixed to the housing 5, and a main lip 80 and an auxiliary lip 81 formed on the inner periphery are brought into sliding contact with the drive shaft 3, Auxiliary lip 82 formed on the dust-proof cover 9 is in sliding contact.
[0009]
Further, a breather hole 10 is formed in the housing 5 for communicating the inner space of the housing 5 and the outer space of the housing 5 between the first and second sealing members 7 and 8 so as to reduce the bearing internal pressure when the bearing rotates and stops. Fluctuation is relieved, the bearing internal pressure is always made substantially the same as the external pressure, and the influence on the sealing members 7 and 8 is eliminated as much as possible.
【The invention's effect】
The present invention completely seals the bearing portion to prevent foreign matter from entering the inside of the bearing. Further, the breather hole formed in the housing eliminates fluctuations in the bearing internal pressure during rotation of the bearing and from rotation to stop. Lip wear and rotation torque increase due to lubricant leakage from the member and lip sticking of the sealing member are prevented.
[Brief description of the drawings]
FIG. 1 is a half sectional view of an embodiment of the present invention.
FIG. 2 is a cross-sectional view of the first sealing member of FIG.
FIG. 3 is a cross-sectional view of the second sealing member of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pinion shaft 2 Pinion 3 Drive shaft 4 Spline fitting 5 Housing 6 Double row tapered roller bearing 7 First sealing member 8 Second sealing member 9 Dust cover 10 Breather hole 60 Outer ring 62 Inner ring 63 Inner ring D Drive shaft

Claims (1)

軸部の一端にピニオンが設けられるとともに他端側に駆動軸がスプライン嵌合されるドライブシャフトを、ハウジングに回動自在に支持するドライブシャフト用軸受装置において、ハウジングに支持固定される外輪と、ピニオン軸に嵌合される内輪と、内外輪間に配置される複数の円すいころを備える２列の円すいころ軸受と、ピニオン側の内外輪間に配置される第１密封部材と、ハウジングと駆動軸間に配置される第２密封部材とを有するとともに、第１密封部材は、内外輪にそれぞれその円筒部同士が対向するよう断面Ｌ形金属環が嵌合固定され、外輪側の金属環に一体成形されたゴム等の弾性体の複数のリップが内輪側の金属環に摺接させられる構成であり、第２密封部材は、ハウジングに固定されるとともに、内周に形成された主リップおよび補助リップが駆動軸に摺接させられ、側面に形成された補助リップが防塵カバーに摺接させられる構成であり、反ピニオン側の円すいころおよび第２密封部材間のハウジング内部空間とハウジング外部空間とを連通するブリーザ穴をハウジングに設けていることを特徴とするドライブシャフト用軸受装置。An outer ring supported and fixed to the housing in a drive shaft bearing device in which a drive shaft having a pinion provided at one end of a shaft portion and a drive shaft spline-fitted on the other end side is rotatably supported on the housing; An inner ring fitted to the pinion shaft, two rows of tapered roller bearings having a plurality of tapered rollers disposed between the inner and outer rings, a first sealing member disposed between the inner and outer rings on the pinion side, a housing and a drive A second sealing member disposed between the shafts, and an L-shaped metal ring having a cross-section is fitted and fixed to the inner and outer rings so that the cylindrical portions thereof face each other. A plurality of integrally formed elastic lips such as rubber are in sliding contact with the metal ring on the inner ring side, and the second sealing member is fixed to the housing and has a main rib formed on the inner periphery. Flop and the auxiliary lip is brought into sliding contact with the drive shaft, a configuration in which an auxiliary lip formed on the side surface is brought into sliding contact with the dust cover, the housing interior space between the anti-pinion side of the tapered rollers and the second sealing member and the housing A drive shaft bearing device, wherein a breather hole communicating with an external space is provided in a housing .
JP22879899A 1999-07-08 1999-07-08 Bearing device for drive shaft Expired - Fee Related JP3655133B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22879899A JP3655133B2 (en) 1999-07-08 1999-07-08 Bearing device for drive shaft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22879899A JP3655133B2 (en) 1999-07-08 1999-07-08 Bearing device for drive shaft

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JP2001020949A JP2001020949A (en) 2001-01-23
JP3655133B2 true JP3655133B2 (en) 2005-06-02

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JP2002228009A (en) * 2001-02-05 2002-08-14 Teijin Seiki Co Ltd Oil seal
JP5946710B2 (en) * 2012-07-19 2016-07-06 ナブテスコ株式会社 Eccentric oscillating gear unit
JP6390687B2 (en) * 2016-10-24 2018-09-19 マツダ株式会社 Breather structure of differential unit
KR101982224B1 (en) * 2017-06-22 2019-05-24 주식회사 베어링아트 Differential device comprising the double row bearing for pinion shaft
JP7506969B2 (en) * 2019-05-23 2024-06-27 ナブテスコ株式会社 Structure for suppressing internal pressure rise in reducer

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