JP4692048B2 - Double row bearing device - Google Patents

Double row bearing device Download PDF

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JP4692048B2
JP4692048B2 JP2005108333A JP2005108333A JP4692048B2 JP 4692048 B2 JP4692048 B2 JP 4692048B2 JP 2005108333 A JP2005108333 A JP 2005108333A JP 2005108333 A JP2005108333 A JP 2005108333A JP 4692048 B2 JP4692048 B2 JP 4692048B2
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Prior art keywords
seal
inner ring
ring
bearing device
outer peripheral
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JP2006283944A (en
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謙 安達
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JTEKT Corp
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JTEKT Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/768—Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals
    • 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
    • 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
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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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

本発明は、自動車の駆動輪を複列軸受で支持する複列軸受装置に関する。   The present invention relates to a double row bearing device that supports a drive wheel of an automobile with a double row bearing.

自動車の駆動軸に取り付けられた車輪の支持用に各種のころ軸受装置が採用されている。例えば重量の大きいトラックの後輪は、隣接して配置された二つのころ軸受を含むころ軸受装置によって駆動軸に取り付けられている。このような複列ころ軸受装置として、軸方向一端側にフランジ部を有する駆動軸が内部に挿通された車軸管と、前記フランジ部に取り付けられて前記車軸管の外周に設けられたハブ輪と、このハブ輪と前記車軸管との間で当該ハブ輪を前記車軸管に対して回転可能に支持し、かつ軸方向で突き合わせて設けられた一対の内輪を有する複列ころ軸受とを備えたものがある。   Various roller bearing devices are used for supporting a wheel attached to a drive shaft of an automobile. For example, the rear wheel of a heavy truck is attached to the drive shaft by a roller bearing device including two roller bearings arranged adjacent to each other. As such a double row roller bearing device, an axle tube in which a drive shaft having a flange portion on one axial end side is inserted, and a hub wheel attached to the flange portion and provided on the outer periphery of the axle tube, And a double row roller bearing having a pair of inner rings provided so as to rotatably support the hub wheel with respect to the axle tube between the hub wheel and the axle tube, and are provided to face each other in the axial direction. There is something.

上記のような複列ころ軸受装置において、内輪が車軸管に着脱できるように挿嵌されているので、内輪と車軸管との間にわずかの隙間がある。また、車軸管はデフケースと連通しているために、デフオイルが上記隙間に入り込み、内輪の突き合わせ端面間からデフオイル等の液状物が軸受内部に侵入するおそれがある。そこで、デフオイル等の侵入防止策として、例えば内輪の突き合わせ端面間にＯリングを入れた図４（ａ）に示すものや、内周面に形成した二つの各溝にＯリングを入れてシールすると共に、内周面中央部分に径内方向へ向かう凸部を設けて位置決めした図４（ｂ）に示すシールリングも知られている（例えば特許文献１参照）。さらに、突き合わせ端面同士の境目部分に環状凹部を形成し、この環状凹部に入り込むシールリングを設けた図４（ｃ）に示すものもある。
特表２０００−５０９７９１号公報 In the double-row roller bearing device as described above, since the inner ring is inserted so as to be detachable from the axle tube, there is a slight gap between the inner ring and the axle tube. In addition, since the axle tube communicates with the differential case, the differential oil enters the gap, and there is a possibility that a liquid material such as differential oil enters the bearing from between the butted end surfaces of the inner ring. Therefore, as a measure for preventing intrusion of differential oil or the like, for example, as shown in FIG. 4A in which an O-ring is inserted between the butted end surfaces of the inner ring, or two grooves formed on the inner peripheral surface are inserted and sealed. In addition, there is also known a seal ring shown in FIG. 4B in which a convex portion directed radially inward is provided at the center portion of the inner peripheral surface (see, for example, Patent Document 1). Furthermore, there is also a case shown in FIG. 4C in which an annular recess is formed at the boundary between the butted end faces, and a seal ring is provided to enter the annular recess.
JP 2000-509791 A

図４（ａ）に示すＯリングを挟み込んだものでは、外輪につれて内輪も回転方向に動いて二つある内輪間に回転差が生じると、当該Ｏリングが損傷するおそれがある。また、図４（ｂ）に示すシールリングでは、Ｏリングの摩耗が起こると当該シールリングが軸方向に移動することが考えられる。したがって、これら図４（ａ）、（ｂ）に示すシール構造においてはデフオイル等が軸受内に侵入するおそれがある。一方、図４（ｃ）に示すシールリングでは、内輪の境目部分に環状凹部を加工しなければならないためシールリングの装着に手間を要する点で不利である。
本発明はこのような従来の問題点に鑑み、シールリングを簡易に装着することができ、かつ、軸受内へのデフオイル等の液状物の侵入が確実に防止された複列軸受装置を提供することを目的とする。 In the case where the O-ring shown in FIG. 4A is sandwiched, the O-ring may be damaged if the inner ring moves in the rotational direction along with the outer ring and a rotation difference occurs between the two inner rings. Further, in the seal ring shown in FIG. 4B, it is considered that when the O-ring is worn, the seal ring moves in the axial direction. Therefore, in the seal structure shown in FIGS. 4A and 4B, there is a possibility that differential oil or the like may enter the bearing. On the other hand, the seal ring shown in FIG. 4 (c) is disadvantageous in that it takes time to mount the seal ring because an annular recess must be processed at the boundary of the inner ring.
SUMMARY OF THE INVENTION The present invention provides a double row bearing device in which a seal ring can be easily mounted and liquid materials such as differential oil are reliably prevented from entering the bearing in view of such conventional problems. For the purpose.

上記目的を達成するため、本発明は次の技術的手段を講じた。
すなわち本発明は、軸方向一端側にフランジを有する駆動軸が内部に挿通された車軸管と、前記フランジ部に取り付けられて前記車軸管の外周に設けられたハブ輪と、このハブ輪と前記車軸管との間で当該ハブ輪を前記車軸管に対して回転可能に支持し、かつ軸方向で突き合わせて設けられた一対の内輪を有する複列軸受と、前記内輪の突き合わせ端面同士の境目部分を外周側から漏れ止めするシールリングとを備えた複列軸受装置において、前記シールリングは、前記突き合わせ端面同士の境目部分に押し当てられた弾性体からなる環状のシール部材と、このシール部材を支持する支持部材とからなり、前記支持部材は、前記シール部材に設けられ当該シール部材を外周側から支持するバックアップ部及び、このバックアップ部から延設されると共に一方の前記内輪に対して軸方向移動できないように当該一方の前記内輪に装着されたアーム部を有し、前記アーム部は、当該一方の前記内輪の外周面に嵌合して固定される内周面を有していることを特徴とする。 In order to achieve the above object, the present invention takes the following technical means.
That is, the present invention includes an axle tube in which a drive shaft having a flange on one axial end side is inserted, a hub wheel attached to the flange portion and provided on an outer periphery of the axle tube, the hub wheel, A double row bearing having a pair of inner rings that are rotatably supported with respect to the axle pipe between the axle ring and the axle ring, and a boundary portion between the butted end faces of the inner ring In the double-row bearing device provided with a seal ring for preventing leakage from the outer peripheral side, the seal ring includes an annular seal member made of an elastic body pressed against a boundary portion between the butted end surfaces, and the seal member. A support member for supporting, and the support member is provided on the seal member and supports the seal member from the outer peripheral side, and extends from the backup member. Have a arm mounted on the one said inner ring of so as not to be axially moved relative to one of said inner ring Rutotomoni, the arm portion is fitted and fixed to the outer peripheral surface of the inner ring of the one It has an inner peripheral surface .

上記本発明の複列軸受装置によれば、境目部分の漏れを止めるためのシール部材に設けられたバックアップ部にアーム部が延設され、このアーム部が軸方向移動できないように内輪の外周面に装着されていることにより、当該シール部材が軸方向に位置ずれしない。これにより、軸受内へのデフオイル等の液状物の侵入を確実に防止することができる。シール部材の軸方向への位置ずれは、バックアップ部に延設された前記アーム部によってなされており、従来技術のように内輪の外周面に環状凹部を加工する必要がないため、シールリングを簡易に装着することができる。   According to the double row bearing device of the present invention, the arm portion is extended to the backup portion provided in the seal member for stopping the leakage at the boundary portion, and the outer peripheral surface of the inner ring is prevented from moving in the axial direction. As a result, the seal member is not displaced in the axial direction. Thereby, the penetration | invasion of liquid substances, such as differential oil, in a bearing can be prevented reliably. The axial displacement of the seal member is made by the arm portion extending to the backup portion, and it is not necessary to process an annular recess on the outer peripheral surface of the inner ring as in the prior art, so the seal ring can be simplified. Can be attached to.

上記の本発明において、前記シール部材の形状は、境目部分の漏れを止めるようなものであれば特に限定されるものではないが、当該境目部分に形成された内輪同士の外周溝部に入り込む断面凸形状の第一シール部を備え、第一シール部は、前記外周溝部に押し当てられて弾性変形し、前記一対の内輪との間にシール面を形成するものであることが好ましい。このようにすれば、境目部分に高いシール性を有するシール面が形成され、より確実に境目部分からの漏れを止めることができる。なお、この断面凸形状をなす第一シール部としては、先端部が鋭角となったものやアール状となったものが挙げられる。 In the present invention described above, the shape of the seal member is not particularly limited as long as it prevents leakage at the boundary portion, but the cross-sectional convexity that enters the outer peripheral groove portion of the inner rings formed at the boundary portion. It is preferable that a first seal portion having a shape is provided , and the first seal portion is pressed against the outer peripheral groove portion and elastically deformed to form a seal surface between the pair of inner rings . In this way, a sealing surface having high sealing performance is formed at the boundary portion, and leakage from the boundary portion can be stopped more reliably. In addition, as a 1st seal | sticker part which makes this cross-sectional convex shape, what the front-end | tip part became an acute angle and what became round shape are mentioned.

さらに、上記第一シール部で一次的なシール面を形成する一方で、上記シール部材は、前記第一シール部の他、前記内輪の外周面に押し当てられた第二シール部を備えていることが好ましい。当該第二シール部があることにより二次的なシール面が形成され、境目部分からのデフオイル等の漏れ止め効果を格段に向上させることができる。   Furthermore, while forming a primary seal surface with the first seal portion, the seal member includes a second seal portion pressed against the outer peripheral surface of the inner ring in addition to the first seal portion. It is preferable. Due to the presence of the second seal portion, a secondary seal surface is formed, and the effect of preventing leakage of differential oil or the like from the boundary portion can be significantly improved.

上記の本発明において、前記アーム部に軸方向の移動を規制する位置決め部が設けられ、この位置決め部に係合する係合部が前記内輪に設けられ、前記位置決め部と前記係合部が係合していることが好ましい。この場合、アーム部の軸方向移動が確実に止められることから、シール部材の位置ずれを効果的に防止することができる。   In the present invention described above, the arm portion is provided with a positioning portion that restricts movement in the axial direction, an engaging portion that engages with the positioning portion is provided in the inner ring, and the positioning portion and the engaging portion are engaged. Are preferably combined. In this case, since the axial movement of the arm portion is surely stopped, it is possible to effectively prevent the displacement of the seal member.

上記の通り本発明によれば、内輪に対して軸方向移動できないように装着されたアーム部を設けてシール部材の位置ずれをなくしたので、軸受内へのオイル等の液状物の侵入が確実に防止され、かつ、当該シールリングを簡易に装着することができる。   As described above, according to the present invention, since the arm portion that is mounted so as not to move in the axial direction with respect to the inner ring is provided to eliminate the positional deviation of the seal member, the liquid material such as oil can surely enter the bearing. And the seal ring can be easily attached.

以下、本発明の実施形態について図面を参照しながら説明する。図１は、複列軸受装置の一実施形態を示している。以下の説明中、車輪側（図１左側）をアウタ側といい、車軸側（図１右側）をインナ側という。本実施形態の複列軸受装置１は、例えばトラックの後輪に取り付けて使用されるものであり、図示のように駆動軸２が内部に挿通された車軸管３と、この車軸管３の外周に設けられたハブ輪４と、このハブ輪４と車軸管３との間で当該ハブ輪４を車軸管３に対して回転可能に支持している複列ころ軸受５と、軸受内へのデフオイルの漏れ止めをするシールリング６とを備えている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a double row bearing device. In the following description, the wheel side (left side in FIG. 1) is referred to as the outer side, and the axle side (right side in FIG. 1) is referred to as the inner side. The double-row bearing device 1 of this embodiment is used by being attached to, for example, a rear wheel of a truck. As shown in the figure, an axle tube 3 having a drive shaft 2 inserted therein, and an outer periphery of the axle tube 3 A double-row roller bearing 5 that rotatably supports the hub wheel 4 with respect to the axle tube 3 between the hub wheel 4 and the axle tube 3; And a seal ring 6 for preventing the differential oil from leaking.

このうち、駆動軸２にはアウタ側（一端側）にフランジ７が設けられており、このフランジ７に形成されたボルト孔にボルト８が通されて、同フランジ７にハブ輪４が取り付けられている。このハブ輪４には、駆動輪９及びブレーキロータ１１がボルト１０により取り付けられている。また、この複列ころ軸受装置１のアウタ側は上記フランジ７で覆われていることから、複列軸受装置１内へダストや水が入らないようになっている。   Among these, the drive shaft 2 is provided with a flange 7 on the outer side (one end side), a bolt 8 is passed through a bolt hole formed in the flange 7, and the hub wheel 4 is attached to the flange 7. ing. A drive wheel 9 and a brake rotor 11 are attached to the hub wheel 4 with bolts 10. In addition, since the outer side of the double row roller bearing device 1 is covered with the flange 7, dust and water do not enter the double row bearing device 1.

車軸管３の外周面には段差部１２があり、この段差部１２よりアウタ側が小径部３ａとなっている。この小径部３ａと上記ハブ輪４との間には、複列ころ軸受５が設けられている。同複列ころ軸受５は複列円すいころ軸受として構成されたものであり、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が設けられた単一の外輪１３と、外輪軌道に対向する内輪軌道が設けられた内輪１４と、互いに対向する内外輪軌道面に転動自在に配列された複数の円すいころ１５及びこれらの円すいころ１５をそれぞれ周方向に所定間隔で保持する保持器１６とを備えている。このうち内輪１４は、そのインナ側を段差部１２に当接させた状態でナット１７により締め付け固定されていると共に、車軸管の小径部３ａに若干の隙間をもたせて嵌められている。また、一体となった外輪１３は、ハブ輪４の内周面に締り嵌めされ、その両端を上記フランジ７とブレーキロータ１１により固定されている。   A stepped portion 12 is provided on the outer peripheral surface of the axle tube 3, and the outer diameter side of the stepped portion 12 is a small diameter portion 3 a. A double row roller bearing 5 is provided between the small diameter portion 3 a and the hub wheel 4. The double row roller bearing 5 is configured as a double row tapered roller bearing, and includes a single outer ring 13 provided with a pair of tapered raceway surfaces that increase from the center toward both ends in the axial direction, and an outer ring. An inner ring 14 provided with an inner ring raceway facing the raceway, a plurality of tapered rollers 15 arranged in a freely rolling manner on inner and outer ring raceway surfaces facing each other, and these tapered rollers 15 are respectively held at predetermined intervals in the circumferential direction. And a cage 16. Of these, the inner ring 14 is fastened and fixed by a nut 17 with its inner side in contact with the stepped portion 12, and is fitted into the small diameter portion 3a of the axle tube with a slight gap. The integrated outer ring 13 is tightly fitted to the inner peripheral surface of the hub ring 4, and both ends thereof are fixed by the flange 7 and the brake rotor 11.

内輪１４は、アウタ側の第一内輪１４Ａとインナ側の第二内輪１４Ｂからなり、図２に示すようにこれら第一、第二内輪１４Ａ、１４Ｂの突き合わせ部分に形成された溝１８に連結管１９が装着されている。この連結管１９を装着することにより、軸受５を車軸管の小径部３ａにスムーズに挿脱することができる。また、内外輪１３，１４間の環状空間には、複列の円すいころ１５が保持器１６によって保持されており、この環状空間の両端部にそれぞれゴム製のシール部材２０が装着されていることで軸受５内が密封されている。   The inner ring 14 includes an outer-side first inner ring 14A and an inner-side second inner ring 14B. As shown in FIG. 2, the inner ring 14 is connected to a groove 18 formed in a butt portion of the first and second inner rings 14A and 14B. 19 is installed. By mounting the connecting pipe 19, the bearing 5 can be smoothly inserted into and removed from the small diameter portion 3a of the axle pipe. In addition, in the annular space between the inner and outer rings 13, 14, double rows of tapered rollers 15 are held by a cage 16, and rubber seal members 20 are respectively attached to both ends of the annular space. The inside of the bearing 5 is sealed.

図２に示すように、内輪１４Ａ，１４Ｂの突き合わせ端面同士の外周側境目部分２０にシールリング６が装着されている。このシールリング６は、境目部分２０に押し当てられた環状のシール部材６Ｓと、このシール部材６Ｓと一体に設けられこれを外周側から支持する環状のバックアップ部６ｗ及び、当該バックアップ部６ｗから延設されると共に軸方向移動できないように第一内輪１４Ａに装着されたアーム部６ｍからなる支持部材６Ｆとを備えている。シール部材６Ｓは、境目部分２０を覆う十分な幅及び所要厚みを有するゴムからなるものであり、その外周面及びアウタ側の側面にはバックアップ部６ｗが一体に固着されている。また、同シール部材６Ｓの内周面には、凸形状の第一シール部６Ｓａとこの第一シール部６Ｓａの左右両側に位置する二つの第二シール部６Ｓｂが形成されている。   As shown in FIG. 2, the seal ring 6 is attached to the outer peripheral side boundary portion 20 between the butted end faces of the inner rings 14A and 14B. The seal ring 6 includes an annular seal member 6S pressed against the boundary portion 20, an annular backup portion 6w that is provided integrally with the seal member 6S and supports the seal member 6S from the outer peripheral side, and extends from the backup portion 6w. And a support member 6F including an arm portion 6m attached to the first inner ring 14A so as not to move in the axial direction. The seal member 6S is made of rubber having a sufficient width and required thickness for covering the boundary portion 20, and a backup portion 6w is integrally fixed to the outer peripheral surface and the outer side surface. In addition, a convex first seal portion 6Sa and two second seal portions 6Sb located on the left and right sides of the first seal portion 6Sa are formed on the inner peripheral surface of the seal member 6S.

内輪１４Ａ、１４Ｂの突き合わせ端面の外周角はアール形状となっており、境目部分２０には外周溝部２１が構成されている。シール部材６Ｓに形成された上記第一シール部６Ｓａは、この外周溝２１に入り込む断面三角形状をなしており、その先端部が同外周溝２１の最下部に突き当てられ、その両傾斜面が内輪１４Ａ、１４Ｂのアール面に当てられて変形している。これにより、内輪１４Ａ、１４Ｂと第一シール部６Ｓａとで第一シール面が形成されている。第一シール部６Ｓａの左右両側に位置する第二シール部６Ｓｂは、内側傾斜面とこれよりも急な角度の外側傾斜面とで構成された断面三角形状をなしており、その先端部は内輪１４Ａ、１４Ｂの外周面に押し当てられて変形し、それぞれ第二シール面が形成されている。このようにシールリング６で上記第一、第二シール面が形成されていることにより、内輪１４Ａ，１４Ｂと車軸管３との隙間からくるデフオイル等の液状物が軸受５の内部に侵入するのを防止することができる。   The outer peripheral angles of the butted end faces of the inner rings 14A and 14B are rounded, and an outer peripheral groove portion 21 is formed at the boundary portion 20. The first seal portion 6Sa formed on the seal member 6S has a triangular cross-section that enters the outer circumferential groove 21, and its tip end is abutted against the lowermost portion of the outer circumferential groove 21. The inner rings 14A and 14B are deformed by being applied to the rounded surfaces. Thereby, the first seal surface is formed by the inner rings 14A and 14B and the first seal portion 6Sa. The second seal portion 6Sb located on both the left and right sides of the first seal portion 6Sa has a triangular cross section composed of an inner inclined surface and an outer inclined surface having a steeper angle than the inner inclined surface, and the tip end portion is an inner ring. 14A and 14B are pressed against the outer peripheral surfaces and deformed to form second seal surfaces, respectively. Since the first and second seal surfaces are formed by the seal ring 6 in this way, liquid materials such as differential oil coming from the gaps between the inner rings 14 </ b> A and 14 </ b> B and the axle tube 3 enter the bearing 5. Can be prevented.

また、バックアップ部６ｗは、本体部６ｗ１とこのアウタ側の端部から径内方向に延びる側部６ｗ２とからなっており、同本体部６ｗ１と側部６ｗ２によってシール部材６Ｓの外周面とアウタ側の側面が覆われている。また、上記側部６ｗ２は、第一シール部６Ｓａ及び第二シール部６Ｓｂが径内方向に押し付け変形させられて第一シール面と第二シール面とが形成されるような径方向寸法を有している。さらに、側部６ｗ２の内周端部から軸方向アウタ側に延びるアーム部６ｍが延設されており、同アーム部６ｍの内周面が第一内輪１４Ａの外周面に嵌合されていることで当該アーム部６ｍが第一内輪１４Ａに固定され軸方向に動かないようになっている。   The backup portion 6w is composed of a main body portion 6w1 and a side portion 6w2 extending radially inward from the outer side end portion. The outer peripheral surface of the seal member 6S and the outer side are formed by the main body portion 6w1 and the side portion 6w2. The sides are covered. The side portion 6w2 has a radial dimension such that the first seal portion 6Sa and the second seal portion 6Sb are pressed and deformed radially inward to form a first seal surface and a second seal surface. is doing. Further, an arm portion 6m extending from the inner peripheral end of the side portion 6w2 to the axial outer side is extended, and the inner peripheral surface of the arm portion 6m is fitted to the outer peripheral surface of the first inner ring 14A. The arm portion 6m is fixed to the first inner ring 14A so as not to move in the axial direction.

上記本実施形態の複列軸受装置１（複列円すいころ軸受装置）によれば、境目部分２０の漏れを止めるためのシール部材６Ｓに固着されたバックアップ部６ｗにアーム部６ｍが設けられ、このアーム部６ｍが第一内輪１４Ａの外周面に嵌合していることにより、第一内輪１４Ａに対してシール部材６Ｓが位置ずれしない。したがって、第一シール部６Ｓａが境目部分２０から軸方向に離れることがないので、軸受５内へのデフオイル等の液状物の侵入を防止することができる。また、このようにシールリング６の軸方向への位置ずれはアーム部６ｍによって達成されているため、従来技術のように内輪の外周面に環状凹部等を加工する必要がなく、シールリング７を内輪１４に簡易に装着することができる。さらに、シール部材６Ｓにより第一、第二シール面が形成されているので、境目部分２０からのデフオイル等の液状物の漏れ止め効果を格段に向上させることができる。   According to the double-row bearing device 1 (double-row tapered roller bearing device) of the present embodiment, the arm portion 6m is provided on the backup portion 6w fixed to the seal member 6S for stopping the leakage of the boundary portion 20, Since the arm portion 6m is fitted to the outer peripheral surface of the first inner ring 14A, the seal member 6S is not displaced with respect to the first inner ring 14A. Accordingly, since the first seal portion 6Sa does not move away from the boundary portion 20 in the axial direction, liquid material such as differential oil can be prevented from entering the bearing 5. Further, since the axial displacement of the seal ring 6 is achieved by the arm portion 6m as described above, there is no need to process an annular recess or the like on the outer peripheral surface of the inner ring as in the prior art, and the seal ring 7 It can be easily attached to the inner ring 14. Furthermore, since the first and second sealing surfaces are formed by the seal member 6S, the effect of preventing leakage of liquid material such as differential oil from the boundary portion 20 can be significantly improved.

本発明は、上記実施形態に限定するものではない。例えば、図３（ａ）に示すように、アーム部６ｍに位置決め用の凸部２２（位置決め部）を設けてもよい。同図に示すように、アーム部６ｍの先端部に径内方向に突出する凸部２２が形成されており、この凸部２２が第一内輪１４Ａの外周面に形成された環状溝２３（係合部）に係合している。これにより、アーム部６ｍの軸方向の動きが確実に止められることから、シーリング６の軸方向の位置ずれを確実に防止することができる。なお、図示しないがアーム部６ｍに係合孔を形成し、この係合孔に内輪に形成した環状凸部を係合させるようにしてもよい。   The present invention is not limited to the above embodiment. For example, as shown to Fig.3 (a), you may provide the convex part 22 (positioning part) for positioning in the arm part 6m. As shown in the figure, a convex portion 22 projecting radially inward is formed at the distal end portion of the arm portion 6m, and this convex portion 22 is an annular groove 23 (engagement) formed on the outer peripheral surface of the first inner ring 14A. Engaging). Thereby, since the axial movement of the arm portion 6m is reliably stopped, the axial displacement of the sealing 6 can be reliably prevented. Although not shown, an engagement hole may be formed in the arm portion 6m, and an annular protrusion formed on the inner ring may be engaged with the engagement hole.

さらに、図３（ｂ）に示すように、アーム部６ｍの内周面と第一内輪１４Ａの外周面との間に弾性体２４（ゴム）を介在させてもよい。この場合には、第一内輪１４Ａ外周の径寸法や表面粗さの精度に影響を受けずにアーム部６ｍを当該第一内輪１４Ａに装着することができ、シールリング６がさらに装着し易くなる。なお、軸受は複列であれば転動体の種類を限定するものではなく、またシール部材６Ｓ、支持部材６Ｆの形状、寸法等を他の形状に変更することもできる。   Furthermore, as shown in FIG. 3B, an elastic body 24 (rubber) may be interposed between the inner peripheral surface of the arm portion 6m and the outer peripheral surface of the first inner ring 14A. In this case, the arm portion 6m can be mounted on the first inner ring 14A without being affected by the diameter of the outer circumference of the first inner ring 14A and the accuracy of the surface roughness, and the seal ring 6 can be more easily mounted. . In addition, if a bearing is double row | line | column, the kind of rolling element will not be limited, Moreover, the shape of a sealing member 6S and the supporting member 6F, a dimension, etc. can also be changed into another shape.

複列転がり軸受装置を車両に組み込んだ一実施形態を示す断面図である。It is sectional drawing which shows one Embodiment which incorporated the double row rolling bearing apparatus in the vehicle. 図１の要部断面図である。It is principal part sectional drawing of FIG. （ａ）、（ｂ）はそれぞれシールリングの変形例を示す拡大断面図である。(A), (b) is an expanded sectional view which shows the modification of a seal ring, respectively. （ａ）〜（ｃ）はそれぞれ従来技術を示す断面図である。(A)-(c) is sectional drawing which shows a prior art, respectively.

符号の説明Explanation of symbols

１ 複列円すいころ軸受受装置（複列軸受装置）
２ 駆動軸
３ 車軸管
４ ハブ輪
５ 複列円すいころ軸受
６ シールリング
６Ｓ シール部材
６Ｆ 支持部材
６ｗ バックアップ部
６ｍ アーム部
１４Ａ 第一内輪
１４Ｂ 第二内輪
２０ 境目部分 1 Double row tapered roller bearing receiver (Double row bearing device)
2 Drive shaft 3 Axle tube 4 Hub wheel 5 Double row tapered roller bearing 6 Seal ring 6S Seal member 6F Support member 6w Backup part 6m Arm part 14A First inner ring 14B Second inner ring 20 Boundary part

Claims (4)

軸方向一端側にフランジを有する駆動軸が内部に挿通された車軸管と、前記フランジ部に取り付けられて前記車軸管の外周に設けられたハブ輪と、このハブ輪と前記車軸管との間で当該ハブ輪を前記車軸管に対して回転可能に支持し、かつ軸方向で突き合わせて設けられた一対の内輪を有する複列軸受と、前記内輪の突き合わせ端面同士の境目部分を外周側から漏れ止めするシールリングとを備えた複列軸受装置において、
前記シールリングは、前記突き合わせ端面同士の境目部分に押し当てられた弾性体からなる環状のシール部材と、このシール部材を支持する支持部材とからなり、前記支持部材は、前記シール部材に設けられ当該シール部材を外周側から支持するバックアップ部及び、このバックアップ部から延設されると共に一方の前記内輪に対して軸方向移動できないように当該一方の前記内輪に装着されたアーム部を有し、
前記アーム部は、当該一方の前記内輪の外周面に嵌合して固定される内周面を有していることを特徴とする複列軸受装置。 An axle tube in which a drive shaft having a flange on one end side in the axial direction is inserted, a hub wheel attached to the flange portion and provided on an outer periphery of the axle tube, and between the hub wheel and the axle tube In this case, the hub wheel is rotatably supported with respect to the axle tube, and a double row bearing having a pair of inner rings provided so as to abut against each other in the axial direction and a boundary portion between the abutting end faces of the inner ring leak from the outer peripheral side. In the double row bearing device provided with a sealing ring for stopping,
The seal ring includes an annular seal member made of an elastic body pressed against a boundary portion between the butted end surfaces, and a support member that supports the seal member, and the support member is provided on the seal member. backup unit for supporting the sealing member from the outer peripheral side and have a arm mounted on the one said inner ring of so as not to be axially moved relative to one of the inner ring while being extended from the backup unit,
The double row bearing device , wherein the arm portion has an inner peripheral surface that is fitted and fixed to an outer peripheral surface of the one inner ring . 前記シール部材は、前記突き合わせ端面同士の境目部分に形成された外周溝部に入り込む断面凸形状の第一シール部を備えており、
前記第一シール部は、前記外周溝部に押し当てられて弾性変形し、前記一対の内輪との間にシール面を形成する請求項１に記載の複列軸受装置。 The seal member includes a first seal portion having a convex cross section that enters an outer peripheral groove formed at a boundary portion between the abutting end faces ,
2. The double-row bearing device according to claim 1, wherein the first seal portion is pressed against the outer circumferential groove portion and elastically deforms to form a seal surface between the pair of inner rings . 前記シール部材は、前記第一シール部の他、前記内輪の外周面に押し当てられた第二シール部を備えている請求項２に記載の複列軸受装置。   The double-row bearing device according to claim 2, wherein the seal member includes a second seal portion pressed against an outer peripheral surface of the inner ring in addition to the first seal portion. 前記アーム部に軸方向移動を規制する位置決め部が設けられ、この位置決め部に係合する係合部が前記内輪に設けられ、前記位置決め部と前記係合部が係合している請求項１〜３のいずれかに記載の複列軸受装置。 The positioning part which restricts an axial direction movement is provided in the said arm part , The engaging part engaged with this positioning part is provided in the said inner ring, The said positioning part and the said engaging part are engaging. The double-row bearing device according to any one of?
JP2005108333A 2005-04-05 2005-04-05 Double row bearing device Expired - Fee Related JP4692048B2 (en)

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ES1098809Y (en) * 2013-12-19 2014-04-25 Fersa Innova S L U SEAL
DE102015220151B4 (en) * 2015-10-16 2022-07-07 Aktiebolaget Skf Bearing assembly and seal
DE102019130275A1 (en) * 2019-11-11 2021-05-12 Schaeffler Technologies AG & Co. KG Wheel bearing unit
DE102022103258A1 (en) 2022-02-11 2023-08-17 Schaeffler Technologies AG & Co. KG Wheel bearing unit for a vehicle
CN117006156B (en) * 2023-09-27 2023-12-26 万向钱潮股份公司 Combined roller bearing for new energy vehicle

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Publication number Priority date Publication date Assignee Title
JPH10184708A (en) * 1996-12-26 1998-07-14 Ntn Corp Sealed type roller bearing
JP2000509791A (en) * 1996-05-06 2000-08-02 ボルボ ラストヴァグナル アーベー Sealing device for bearing structure and structure for sealing bearing device
JP2001082979A (en) * 1999-09-10 2001-03-30 Ntn Corp Rotating speed detecting device and wheel bearing device fitted with the device
JP2001099172A (en) * 1999-09-27 2001-04-10 Ntn Corp Drive wheel support device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000509791A (en) * 1996-05-06 2000-08-02 ボルボ ラストヴァグナル アーベー Sealing device for bearing structure and structure for sealing bearing device
JPH10184708A (en) * 1996-12-26 1998-07-14 Ntn Corp Sealed type roller bearing
JP2001082979A (en) * 1999-09-10 2001-03-30 Ntn Corp Rotating speed detecting device and wheel bearing device fitted with the device
JP2001099172A (en) * 1999-09-27 2001-04-10 Ntn Corp Drive wheel support device

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