JP2006312961A - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
JP2006312961A
JP2006312961A JP2005135596A JP2005135596A JP2006312961A JP 2006312961 A JP2006312961 A JP 2006312961A JP 2005135596 A JP2005135596 A JP 2005135596A JP 2005135596 A JP2005135596 A JP 2005135596A JP 2006312961 A JP2006312961 A JP 2006312961A
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Prior art keywords
ring
hub
wheel
contact
flange
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JP2005135596A
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Japanese (ja)
Inventor
Yoshiaki Kuchiki
義明 朽木
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2005135596A priority Critical patent/JP2006312961A/en
Publication of JP2006312961A publication Critical patent/JP2006312961A/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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • F16C33/7826—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring
    • 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
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
    • F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
    • 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)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To obtain the sealing performance of an outboard side end, and reduction in weight and costs, in a tapered roller bearing device having a flange ring for a wheel. <P>SOLUTION: The bearing device for the wheel is provided with an outer member 1 having a double row rolling surface 1a in the inner periphery, and an inner member 2 having a double row conical rolling surface 2a, opposed to the rolling surface, and double rows of conical rollers 4 disposed between rolling surfaces of the inner and the outer members. The inner member has a hub ring 3 having a hub flange 11 in the outer periphery near the end outer periphery of an inboard side to form the rolling surface 2a of each row in the hub ring and the inner ring. The inner ring has a major flange 5a in the inboard side. A flange ring 6 in contact with a major end of the conical roller of the outboard side row is fitted in the position adjoining the hub flange in the outer periphery of the hub ring. A sealing member 8 having a sealing lip broght into contact with the flange ring is fitted in the outboard side end in the inner peripheral surface of the outer member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、ハブユニット形式の円錐ころ形の車輪用軸受装置に関し、特に、車両重量の重い大型トラックや、ワゴン車、あるいは一般乗用車に用いられる車輪用軸受装置に関する。   The present invention relates to a hub unit type tapered roller wheel bearing device, and more particularly to a wheel bearing device used in a heavy truck, a wagon car, or a general passenger car with heavy vehicle weight.

従来、車輪用軸受装置として、図６に示す円錐ころ軸受型でかつハブユニット形式（第３世代型）としたものが用いられている（例えば特許文献１）。この軸受装置は、外方部材３１と内方部材３２の間に複列の円錐ころ３４を介在させ、内方部材３２をハブ輪３３と内輪３５とで構成したものである。ハブ輪３３および内輪３５に各列の転走面３２ａが形成されている。ハブ輪３３はアウトボード側の端部外周にハブフランジ４１を有し、ハブ輪３３の外周におけるハブフランジ４１に隣接する箇所に、アウトボード側列の円錐ころ３４の大端に接する鍔輪３６が嵌合させてある。   Conventionally, as a wheel bearing device, a tapered roller bearing type shown in FIG. 6 and a hub unit type (third generation type) is used (for example, Patent Document 1). In this bearing device, double rows of tapered rollers 34 are interposed between an outer member 31 and an inner member 32, and the inner member 32 is constituted by a hub ring 33 and an inner ring 35. Each row of rolling surfaces 32 a is formed on the hub wheel 33 and the inner ring 35. The hub wheel 33 has a hub flange 41 on the outer periphery of the end on the outboard side, and a saddle wheel 36 in contact with the large end of the tapered roller 34 on the outboard side row at a location adjacent to the hub flange 41 on the outer periphery of the hub wheel 33. Is fitted.

なお、一般的には、上記鍔輪３６を設けず、アウトボード側の円錐ころ３４の大端に接する大鍔（図示せず）をハブ輪３３に形成している。しかし、その場合、ハブ輪３３の大鍔の基端に形成される研磨ぬすみにより、過大な応力が発生することがある。この研磨ぬすみの形成箇所は、荷重条件の厳しいハブフランジ４１の付け根の位置であり、特に車両重量の大きい大型トラック等に適用した場合、モーメント荷重が負荷されたときに、上記応力集中により疲労が生じ易くなる。鍔輪３６は、このような研磨ぬすみ部の応力集中による耐久性の低下を防止するために設けられたものである。   In general, the hub ring 33 is not provided with a large collar (not shown) that contacts the large end of the tapered roller 34 on the outboard side. However, in that case, an excessive stress may be generated due to the polishing thinning formed at the base end of the hub ring 33. The location where the ground thinning is formed is the base position of the hub flange 41 where the load conditions are severe. In particular, when applied to a large truck having a heavy vehicle weight, when the moment load is applied, the stress concentration causes fatigue. It tends to occur. The eaves ring 36 is provided in order to prevent such a decrease in durability due to the stress concentration in the polishing shading portion.

内外の部材３２，３１間に形成される環状空間のアウトボード側およびインボード側の各開口端部は、それぞれ接触式の密封装置３８，３９で密封されている。アウトボード側の密封装置３８は、図７に拡大断面図で示すように、外方部材３１の内周面に嵌合したシール部材４２と、前記鍔輪３６に圧入嵌合され、前記シール部材４２が接する断面Ｌ字状のスリンガ４３とで構成される。
特開２００４−３４０２４２号公報 The open end portions on the outboard side and the inboard side of the annular space formed between the inner and outer members 32 and 31 are sealed by contact-type sealing devices 38 and 39, respectively. As shown in an enlarged cross-sectional view in FIG. 7, the outboard side sealing device 38 is press-fitted into the seal member 42 fitted to the inner peripheral surface of the outer member 31 and the collar 36, and the seal member And a slinger 43 having an L-shaped cross section in contact with 42.
JP 2004-340242 A

上記構成の密封装置３９の場合、シール部材４２とスリンガ４３の位置を精密に調整することが、信頼性の高いシール性を得るために必要となる。しかし、鍔輪３６へのスリンガ４３の圧入において、図８（Ａ）のようにスリンガ４３の軸方向端部を治具４４で押す場合、鋼板の打ち抜き加工品であるスリンガ４３の寸法精度が悪く軸方向寸法Ｌのばらつきが大きい。そのため、シール部材４２のサイドリップ４２ａ，４２ｂの接触面となるスリンガ立板部４３ａの位置を精密に調整できず、シール性を確保することが難しい。
また、図８（Ｂ）のようにスリンガ立板部４３ａを治具４４Ａで押してスリンガ４３を鍔輪３６へ圧入する場合、スリンガ立板部４３ａが変形するので、その位置を精密に調整できず、やはりシール性を確保することが難しい。さらに、シール部材４２と別体のスリンガ４３を設けることで、軽量化およびコスト低減が阻害される。 In the case of the sealing device 39 configured as described above, it is necessary to precisely adjust the positions of the sealing member 42 and the slinger 43 in order to obtain a highly reliable sealing property. However, in the press-fitting of the slinger 43 into the collar 36, when the axial end of the slinger 43 is pushed with the jig 44 as shown in FIG. 8A, the dimensional accuracy of the slinger 43, which is a punched steel product, is poor. The variation in the axial dimension L is large. Therefore, it is difficult to precisely adjust the position of the slinger standing plate portion 43a that becomes the contact surface of the side lips 42a and 42b of the seal member 42, and it is difficult to ensure the sealing performance.
Further, as shown in FIG. 8B, when the slinger standing plate portion 43a is pushed with the jig 44A and the slinger 43 is press-fitted into the eaves 36, the slinger standing plate portion 43a is deformed, so that the position cannot be adjusted precisely. After all, it is difficult to ensure sealing performance. Furthermore, providing the slinger 43 separate from the seal member 42 prevents weight reduction and cost reduction.

この発明の目的は、鍔輪を設けた円錐ころ形の車輪用軸受装置において、アウトボード側端のシール性の確保、軽量化、およびコスト低減を図ることである。   SUMMARY OF THE INVENTION An object of the present invention is to ensure sealing performance at the outboard side end, reduce weight, and reduce costs in a tapered roller type wheel bearing device provided with a collar.

この発明の車輪用軸受装置は、内周に互いに小径側が隣合う複列の円錐状の転走面を有する外方部材と、この転走面に対向する複列の円錐状の転走面を有する内方部材と、これら内外の部材の転走面間に介在した複列の円錐ころとを備え、前記内方部材は、アウトボード側の端部付近の外周にハブフランジを有するハブ輪と、このハブ輪のインボード側の端部外周に嵌合した内輪とを有し、これらハブ輪および内輪に前記複列の転走面となる各列の転走面が形成され、前記内輪はインボード側に大鍔を有し、前記ハブ輪の外周におけるハブフランジに隣接する箇所に、アウトボード側列の円錐ころの大端に接する鍔輪を嵌合させた車輪用軸受装置において、前記鍔輪にシールリップが接するシール部材を、前記外方部材の内周面におけるアウトボード側端に取り付け、前記鍔輪の前記シールリップが接する面を、表面粗さを平坦化させた平坦化加工面としたことを特徴とする。
この構成によると、外方部材に取り付けたシール部材のシールリップが、ハブ輪に嵌合させた鍔輪に接することで、内外の部材間のアウトボード側端の密封が図られる。この場合に、シールリップを鍔輪に直接に接触させるため、従来例の場合のように鍔輪に嵌合させるスリンガが不要で部品点数の削減となると共に、鍔輪へスリンガを圧入する工程も要らず、軽量化およびコスト低減が可能となる。また、スリンガを圧入する場合のスリンガの変形や位置調整不良に起因するシール性低下がない。鍔輪におけるシールリップが接する面は平坦化加工面としているので、高いシール性が確保され、シールリップの摩耗も低減される。 The wheel bearing device of the present invention comprises an outer member having a double row conical rolling surface adjacent to the inner diameter on the inner circumference, and a double row conical rolling surface facing the rolling surface. An inner member and a double-row tapered roller interposed between the rolling surfaces of the inner and outer members, and the inner member includes a hub ring having a hub flange on the outer periphery in the vicinity of the end portion on the outboard side. And an inner ring fitted to the outer periphery of the end portion on the inboard side of the hub wheel, and the hub ring and the inner ring are formed with rolling surfaces of each row to be the double-row rolling surface, In the wheel bearing device, having a large collar on the inboard side and fitting a collar ring in contact with the large end of the tapered roller in the outboard side row at a location adjacent to the hub flange on the outer periphery of the hub ring, The seal member with the seal lip in contact with the collar is attached to the outer peripheral surface of the outer member. Attached to the board side end, the sealing lip contacts the surface of the collar wheel, characterized in that the surface roughness was flattened flattening surface.
According to this configuration, the seal lip of the seal member attached to the outer member is in contact with the collar ring fitted to the hub ring, whereby the outboard side end between the inner and outer members is sealed. In this case, since the seal lip is brought into direct contact with the collar, there is no need for a slinger to be fitted to the collar as in the case of the conventional example, the number of parts is reduced, and a process for press-fitting the slinger into the collar is also included. There is no need to reduce the weight and cost. Further, there is no deterioration in sealing performance due to slinger deformation or poor positioning when the slinger is press-fitted. Since the surface with which the seal lip contacts the flat ring is a flattened surface, high sealing performance is secured and wear of the seal lip is reduced.

前記鍔輪の前記平坦化加工面は、例えば研削加工面とされる。研削加工によると、シールリップが接触して十分なシール性が得られる表面粗さとすることが簡単にできる。   The flattened surface of the saddle wheel is, for example, a ground surface. According to the grinding process, it is possible to easily achieve a surface roughness that allows the seal lip to come into contact and obtain a sufficient sealing property.

前記鍔輪は、ハブ輪の外周に嵌合する円筒状部と、この円筒状部のアウトボード側端から外径側に突出して一側面がハブフランジに接する円輪部とを有し、前記シール部材は、芯金およびこの芯金に固着された弾性体からなり、この弾性体は、前記鍔輪の円輪部の他側面に接するシールリップ、および前記円筒状部の外周面に接するシールリップを有するものであっても良い。
鍔輪がこのような円筒状部と円輪部とでなる段付き円筒面状の形状であると、別体の鍔輪を設けながら、外方部材と内方部材間のアウトボード側端のシールを空間効率良く配置できる。この場合に、前記シールは、鍔輪の円輪部の側面に接するサイドシールリップ、および円筒状部の外周面に接するラジアルシールリップを有するため、優れた密封性が得られる。サイドシールリップを設ける場合、前記従来例のようにスリンガを設けたものであると、スリンガを圧入する場合のスリンガの変形や位置調整不良に起因するシール性低下の問題が大きいが、このようなシール性の低下が、シールリップを鍔輪に直接に接触させる構成とすることで回避される。 The saddle wheel has a cylindrical portion that fits to the outer periphery of the hub wheel, and an annular portion that protrudes from the outer end of the cylindrical portion toward the outer diameter side and has one side surface in contact with the hub flange. The seal member includes a cored bar and an elastic body fixed to the cored bar, and the elastic body includes a seal lip that contacts the other side surface of the ring part of the saddle ring and a seal that contacts the outer peripheral surface of the cylindrical part. It may have a lip.
When the eaves are in the shape of a stepped cylindrical surface composed of such a cylindrical portion and an annular portion, while providing a separate eaves, the outer board side end between the outer member and the inner member The seal can be arranged in a space efficient manner. In this case, since the seal has a side seal lip in contact with the side surface of the annular portion of the saddle wheel and a radial seal lip in contact with the outer peripheral surface of the cylindrical portion, excellent sealing performance can be obtained. When the side seal lip is provided, if the slinger is provided as in the above-described conventional example, there is a large problem of deterioration in sealing performance due to slinger deformation or poor positioning when the slinger is press-fitted. Decreasing the sealing performance can be avoided by adopting a configuration in which the seal lip is brought into direct contact with the collar.

この発明の車輪用軸受装置は、内周に互いに小径側が隣合う複列の円錐状の転走面を有する外方部材と、この転走面に対向する複列の円錐状の転走面を有する内方部材と、これら内外の部材の転走面間に介在した複列の円錐ころとを備え、前記内方部材は、アウトボード側の端部付近の外周にハブフランジを有するハブ輪と、このハブ輪のインボード側の端部外周に嵌合した内輪とを有し、これらハブ輪および内輪に前記複列の転走面となる各列の転走面が形成され、前記内輪はインボード側に大鍔を有し、前記ハブ輪の外周におけるハブフランジに隣接する箇所に、アウトボード側列の円錐ころの大端に接する鍔輪を嵌合させた車輪用軸受装置において、前記鍔輪にシールリップが接するシール部材を、前記外方部材の内周面におけるアウトボード側端に取り付け、前記鍔輪の前記シールリップが接する面を平坦化加工面としたため、鍔輪を設けて耐久性の控除を図った構成でありながら、シール性の確保、軽量化およびコスト低減が可能となる。   The wheel bearing device of the present invention comprises an outer member having a double row conical rolling surface adjacent to the inner diameter on the inner circumference, and a double row conical rolling surface facing the rolling surface. An inner member and a double-row tapered roller interposed between the rolling surfaces of the inner and outer members, and the inner member includes a hub ring having a hub flange on the outer periphery in the vicinity of the end portion on the outboard side. And an inner ring fitted to the outer periphery of the end portion on the inboard side of the hub wheel, and the hub ring and the inner ring are formed with rolling surfaces of each row to be the double-row rolling surface, In the wheel bearing device, having a large collar on the inboard side and fitting a collar ring in contact with the large end of the tapered roller in the outboard side row at a location adjacent to the hub flange on the outer periphery of the hub ring, The seal member with the seal lip in contact with the collar is attached to the outer peripheral surface of the outer member. Because the surface that is attached to the board side end and the seal lip of the collar is in contact with the flattened surface, it has a configuration that is provided with a collar to reduce durability, while ensuring sealing performance, weight reduction, and cost Reduction is possible.

この発明の第１の実施形態を図１ないし図３と共に説明する。この実施形態は、第３世代型の内輪回転タイプで、かつ駆動輪支持用の車輪用軸受装置に適用したものである。なお、この明細書において、車両に取付けた状態で車両の車幅方向外側寄りとなる側をアウトボード側と言い、車両の中央寄りとなる側をインボード側と呼ぶ。図１では、左側がアウトボード側、右側がインボード側となる。
図１のように、この車輪用軸受装置は、ハブユニット形式で、かつ複列の円錐ころ軸受形式としたものであり、内周に互いに小径側が隣合う複列の円錐状の転走面１ａを有する外方部材１と、この転走面１ａに対向する複列の円錐状の転走面２ａを外周に有する内方部材２と、これら内外の部材２，１の転走面２ａ，１ａ間に介在した複列の円錐ころ４とを備える。円錐ころ４は各列毎に保持器７で保持されている。 A first embodiment of the present invention will be described with reference to FIGS. This embodiment is a third generation type inner ring rotation type and is applied to a wheel bearing device for driving wheel support. In this specification, the side closer to the outer side in the vehicle width direction of the vehicle when attached to the vehicle is referred to as the outboard side, and the side closer to the center of the vehicle is referred to as the inboard side. In FIG. 1, the left side is the outboard side and the right side is the inboard side.
As shown in FIG. 1, this wheel bearing device has a hub unit type and a double-row tapered roller bearing type, and has a double-row conical rolling surface 1a adjacent to each other on the inner circumference on the small diameter side. , An inner member 2 having a double-row conical rolling surface 2a facing the rolling surface 1a on the outer periphery, and the rolling surfaces 2a, 1a of these inner and outer members 2, 1 And a double row tapered roller 4 interposed therebetween. The tapered roller 4 is held by a cage 7 for each row.

外方部材１は固定側の部材となるものであって、車体の懸架装置におけるナックル１７に固定するための車体取付フランジ１３を外周に有し、全体が一体の部材とされている。車体取付フランジ１３は、前記ナックル１７に周方向複数箇所のボルト１８で締結される。外方部材１の両端部内周面には内外部材２，１間を密封するシール部材８，９が取付けられている。   The outer member 1 is a member on the fixed side, and has a vehicle body attachment flange 13 for fixing to the knuckle 17 in the suspension device of the vehicle body on the outer periphery, and the whole is an integral member. The vehicle body mounting flange 13 is fastened to the knuckle 17 with a plurality of bolts 18 in the circumferential direction. Seal members 8 and 9 for sealing between the inner and outer members 2 and 1 are attached to the inner peripheral surfaces of both ends of the outer member 1.

内方部材２は回転側の部材となるものであって、アウトボード側の端部付近の外周に車輪取付用のハブフランジ１１を有するハブ輪３と、このハブ輪３のインボード側の端部外周に嵌合した内輪５とを有し、これらハブ輪３および内輪５に上記各列の転走面２ａが形成されている。ハブ輪３の外周における上記ハブフランジ１１に隣接する箇所には、アウトボード側列の円錐ころ４の大端に接する鍔輪６が嵌合させてある。ハブフランジ１１には、その円周方向複数箇所に設けられた各孔を貫通するボルト１２により、タイヤホイールが取付けられる。   The inner member 2 is a member on the rotation side, and has a hub wheel 3 having a hub flange 11 for wheel mounting on the outer periphery near the end portion on the outboard side, and an end on the inboard side of the hub wheel 3. An inner ring 5 fitted to the outer periphery of the part is formed, and the rolling surface 2a of each row is formed on the hub wheel 3 and the inner ring 5. A flange 6 in contact with the large end of the tapered roller 4 in the outboard side row is fitted to a portion adjacent to the hub flange 11 on the outer periphery of the hub wheel 3. A tire wheel is attached to the hub flange 11 by bolts 12 penetrating through holes provided at a plurality of locations in the circumferential direction.

ハブ輪３には等速ジョイント１４の一端の継手外輪１４ａが連結され、他端の継手内輪が駆動軸に連結される。具体的には、ハブ輪３は中央孔１９を有し、この中央孔１９に、継手外輪１４ａに一体に形成されたステム部１５が挿通される。このステム部１５の先端に螺合するナット１６の締め付けにより、継手外輪１４ａがハブ輪３に連結される。このとき、継手外輪１４ａに設けられたアウトボード側に向く段面１４ａａが、ハブ輪３に嵌合した内輪５のインボード側に向く端面に押し付けられ、継手外輪１４ａとナット１６とで内方部材２が幅締めされる。ハブ輪３の中央孔１９にはスプライン溝１９ａが形成されており、ステム部１５のスプライン溝１５ａとスプライン嵌合する。   The hub wheel 3 is connected to the joint outer ring 14a at one end of the constant velocity joint 14, and the joint inner ring at the other end is connected to the drive shaft. Specifically, the hub wheel 3 has a center hole 19, and a stem portion 15 formed integrally with the joint outer ring 14 a is inserted into the center hole 19. The joint outer ring 14 a is coupled to the hub wheel 3 by tightening the nut 16 that is screwed into the tip of the stem portion 15. At this time, the step surface 14aa provided on the joint outer ring 14a facing the outboard side is pressed against the end surface facing the inboard side of the inner ring 5 fitted to the hub wheel 3, and the joint outer ring 14a and the nut 16 The member 2 is tightened. A spline groove 19 a is formed in the center hole 19 of the hub wheel 3, and is spline-fitted with the spline groove 15 a of the stem portion 15.

ハブ輪３のインボード側の端部外周には、段差を持って小径となる内輪嵌合面３ａが形成され、この内輪嵌合面３ａに上記内輪５が嵌合する。内輪５は、そのインボード側端に大鍔５ａを有し、この大鍔５ａの側面にインボード側列の円錐ころ４の大端が接する。大鍔５ａの外周面には、外方部材１の内周面に取付けられたシール９の摺接するスリンガ（シール接触リング）１０が設けられている。このスリンガ１０は、図３に拡大断面図で示すように、円筒部１０ａと、この円筒部１０ａのインボード側端から外径側に延びる立板部１０ｂとでなる断面Ｌ字状とされ、円筒部１０ａで内輪大鍔５ａの外周面に嵌合して取付けられる。   An inner ring fitting surface 3a having a step and a small diameter is formed on the outer periphery of the end portion on the inboard side of the hub wheel 3, and the inner ring 5 is fitted to the inner ring fitting surface 3a. The inner ring 5 has a large flange 5a at the inboard side end thereof, and the large end of the tapered roller 4 in the inboard side row is in contact with a side surface of the large ring 5a. A slinger (seal contact ring) 10 slidably in contact with a seal 9 attached to the inner peripheral surface of the outer member 1 is provided on the outer peripheral surface of the large collar 5a. As shown in an enlarged sectional view in FIG. 3, the slinger 10 has an L-shaped cross section including a cylindrical portion 10a and a standing plate portion 10b extending from the inboard side end of the cylindrical portion 10a to the outer diameter side. The cylindrical portion 10a is fitted and attached to the outer peripheral surface of the inner ring large collar 5a.

ハブ輪３のハブフランジ１１よりもインボード側の外周には円筒面状の鍔輪嵌合面３ｂが形成され、この鍔輪嵌合面３ｂからハブフランジ１１の側面に繋がる円弧状断面部３ｃが形成されている。鍔輪６は、この鍔輪嵌合面３ｂに嵌合している。鍔輪６は、図２に拡大断面図で示すように、ハブ輪３の鍔輪嵌合面３ｂに嵌合する円筒状部６ａと、この円筒状部６ａのアウトボード側端から外径側に突出して一側面がハブフランジ１１に接する円輪部６ｂとを有する。   A cylindrical hook ring fitting surface 3 b is formed on the outer periphery of the hub ring 3 on the inboard side of the hub flange 11, and an arcuate cross section 3 c that connects the hook ring fitting face 3 b to the side surface of the hub flange 11. Is formed. The eaves ring 6 is fitted to the eaves fitting surface 3b. As shown in an enlarged cross-sectional view in FIG. 2, the eaves ring 6 includes a cylindrical portion 6 a that fits on the eaves fitting surface 3 b of the hub ring 3, and an outer diameter side from the outboard side end of the cylindrical portion 6 a And an annular portion 6b whose one side surface is in contact with the hub flange 11.

外方部材１のアウトボード側端に取付けられたシール部材８は、図２のように構成されている。このシール部材８は、外方部材１の内周面に嵌合する芯金２０と、この芯金２０に一体に固着された弾性体２１とでなる。芯金２０は、円筒部２０ａとこの円筒部２０ａのインボード側端から内径側へ延びる立板部２０ｂとでなる断面Ｌ字状とされ、円筒部２０ａで外方部材１の内周面に嵌合して取付けられる。
弾性体２１には、鍔輪６に先端が接する３つのシールリップ２１ａ，２１ｂ，２１ｃが形成されている。弾性体２１の内径側端に形成された１つのシールリップ２１ａは、鍔輪６における円筒状部６ａの外周面６ａａに接するラジアルシールリップである。弾性体２１の前記シールリップ２１ａよりも外径側位置に形成された２つのシールリップ２１ｂ，２１ｃは、鍔輪６における円輪部６ｂのインボード側に向く側面６ｂａに接するサイドシールリップである。これらのシールリップ２１ａ，２１ｂ，２１ｃが接する鍔輪６の上記各面６ａａ，６ｂａは、研削加工により表面粗さを平坦化させた平坦化加工面とされている。 The seal member 8 attached to the end of the outer member 1 on the outboard side is configured as shown in FIG. The seal member 8 includes a cored bar 20 that is fitted to the inner peripheral surface of the outer member 1 and an elastic body 21 that is integrally fixed to the cored bar 20. The metal core 20 has an L-shaped cross section including a cylindrical portion 20a and an upright plate portion 20b extending from the inboard side end of the cylindrical portion 20a to the inner diameter side. The cylindrical portion 20a forms an inner peripheral surface of the outer member 1 with the cylindrical portion 20a. Fits and attaches.
The elastic body 21 is formed with three seal lips 21a, 21b, and 21c whose tips are in contact with the collar ring 6. One seal lip 21 a formed at the inner diameter side end of the elastic body 21 is a radial seal lip that is in contact with the outer peripheral surface 6 aa of the cylindrical portion 6 a of the collar 6. Two seal lips 21b and 21c formed on the outer diameter side of the seal lip 21a of the elastic body 21 are side seal lips in contact with the side surface 6ba facing the inboard side of the ring portion 6b of the collar 6. . The surfaces 6aa and 6ba of the saddle wheel 6 with which the seal lips 21a, 21b and 21c are in contact with each other are flattened surfaces obtained by flattening the surface roughness by grinding.

外方部材１のインボード側端部内周面に取付けられたシール部材９は、図３のように外方部材１の内周面に嵌合する芯金２２と、この芯金２２に一体に固着された弾性体２３とでなる。芯金２２は、円筒部２２ａとこの円筒部２２ａのアウトボード側端から内径側へ延びる立板部２２ｂとでなる断面Ｌ字状とされ、円筒部２２ａで外方部材１の内周面に嵌合して取付けられる。弾性体２３には、前記内輪大鍔５ａの外周面に設けられたスリンガ１０に先端が接する３つのシールリップ２３ａ，２３ｂ，２３ｃが形成されている。弾性体２３の内径側端における軸方向の内外位置に形成された２つのシールリップ２３ａ，２３ｂは、スリンガ１０における円筒部１０ａの外周面に接するラジアルシールリップである。弾性体２３の前記シールリップ２３ａ，２３ｂよりも外径側位置に形成された１つのシールリップ２３ｃは、スリンガ１０における立板部１０ｂのアウトボード側に向く側面に接するサイドシールリップである。   The seal member 9 attached to the inner peripheral surface of the inboard side end portion of the outer member 1 includes a cored bar 22 fitted to the inner peripheral surface of the outer member 1 as shown in FIG. The elastic body 23 is fixed. The cored bar 22 has an L-shaped cross section including a cylindrical portion 22a and a standing plate portion 22b extending from the outboard side end of the cylindrical portion 22a to the inner diameter side. The cylindrical portion 22a is formed on the inner peripheral surface of the outer member 1. Fits and attaches. The elastic body 23 is formed with three seal lips 23a, 23b, 23c whose tips are in contact with the slinger 10 provided on the outer peripheral surface of the inner ring large collar 5a. Two seal lips 23 a and 23 b formed at the inner and outer positions in the axial direction at the inner diameter side end of the elastic body 23 are radial seal lips in contact with the outer peripheral surface of the cylindrical portion 10 a of the slinger 10. One seal lip 23 c formed at a position on the outer diameter side of the seal lips 23 a and 23 b of the elastic body 23 is a side seal lip in contact with the side face of the slinger 10 facing the outboard side of the standing plate portion 10 b.

この構成の車輪用軸受装置によると、外方部材１のアウトボード側端に嵌合させたシール部材８のシールリップ２１ａ〜２１ｃが、ハブ輪３の外周に嵌合させた鍔輪６に接するすることで、内外の部材２，１間のアウトボード端が密封される。シールリップ２１ａ〜２１ｃは、鍔輪６に直接に接触させるため、従来例の場合のように鍔輪に嵌合させるスリンガが不要で、部品点数の削減となると共に、鍔輪へスリンガを圧入する工程も要らず、軽量化およびコスト低減が可能となる。また、スリンガを圧入する場合のスリンガの変形や位置調整不良に起因するシール性低下がない。鍔輪６におけるシールリップ２１ａ〜２１ｃが接する面６ａａ，６ｂａは、研削加工面からなる平坦化加工面としているので、高いシール性を確保でき、またシールリップ２１ａ〜２１ｃの摩耗が低減する。   According to the wheel bearing device of this configuration, the seal lips 21 a to 21 c of the seal member 8 fitted to the outer end of the outer member 1 are in contact with the collar 6 fitted to the outer periphery of the hub wheel 3. By doing so, the outboard end between the inner and outer members 2 and 1 is sealed. Since the seal lips 21a to 21c are brought into direct contact with the saddle wheel 6, there is no need for a slinger to be fitted to the saddle wheel as in the conventional example, the number of parts is reduced, and the slinger is press-fitted into the saddle wheel. No process is required, and weight reduction and cost reduction are possible. Further, there is no deterioration in sealing performance due to slinger deformation or poor positioning when the slinger is press-fitted. Since the surfaces 6aa and 6ba with which the seal lips 21a to 21c of the saddle wheel 6 contact are flattened surfaces made of a ground surface, high sealing performance can be secured and wear of the seal lips 21a to 21c is reduced.

この実施形態では、鍔輪６が円筒状部６ａと円輪部６ｂとを有する段付き円筒面状の外周面形状であり、シール部材８が、ハブ輪３の円輪部６ｂの他側面６ｂａに接するシールリップ２１ｂ，２１ｃ、および円筒状部６ａの外周面６ａａに接するシールリップ２１ａを有するものとしているので、定められた軸受寸法で、鍔輪６とシール部材８とを空間効率良く配置でき、かつシール性の確保も可能となる。   In this embodiment, the collar 6 has a stepped cylindrical surface-like outer peripheral surface shape having a cylindrical portion 6 a and an annular portion 6 b, and the seal member 8 is the other side surface 6 ba of the annular portion 6 b of the hub wheel 3. The seal lip 21b, 21c in contact with the outer peripheral surface 6a and the seal lip 21a in contact with the outer peripheral surface 6aa of the cylindrical portion 6a are provided, so that the saddle ring 6 and the seal member 8 can be arranged in a space efficient manner with a predetermined bearing size. In addition, it is possible to ensure sealing performance.

図４および図５は、この発明の他の実施形態を示す。この実施形態は、先の実施形態の車輪用軸受装置において、アウトボード側のシール部材８Ａを図５に拡大断面図で示すようにしたものである。この実施形態においても、シール部材８Ａは、芯金２４およびこの芯金２４に固着された弾性体２５とでなる。芯金２４は、外方部材１の内径面に嵌合する円筒部２４ａと、この円筒部２４ａのアウトボー側端から内径側へ延びる立板部２４ｂとでなる。弾性体２５は、芯金２４の円筒部２４ａの内周面および立板部２４ｂのアウトボード側の側面を覆い、内径側端に前記鍔輪６の円筒状部６ａの外周面６ａａに接するシールリップ２５ａを有する。また、弾性体２５は、このシールリップ２５ａよりも外径側位置に、前記鍔輪６の円輪部６ｂの側面６ｂａに接する複数のシールリップ２５ｂ，２５ｃを有する。なお、図５において、各シールリップ２５ａ〜２５ｃは、各面６ａａ，６ｂａに接する前の自然状態における形状で図示してある。その他の構成は第１の実施形態の場合と同様である。   4 and 5 show another embodiment of the present invention. In this embodiment, in the wheel bearing device of the previous embodiment, the seal member 8A on the outboard side is shown in an enlarged sectional view in FIG. Also in this embodiment, the seal member 8 </ b> A includes the cored bar 24 and the elastic body 25 fixed to the cored bar 24. The cored bar 24 includes a cylindrical portion 24a that fits to the inner diameter surface of the outer member 1, and a standing plate portion 24b that extends from the outboard side end of the cylindrical portion 24a toward the inner diameter side. The elastic body 25 covers the inner peripheral surface of the cylindrical portion 24a of the cored bar 24 and the side surface on the outboard side of the upright plate portion 24b, and a seal in contact with the outer peripheral surface 6aa of the cylindrical portion 6a of the collar 6 at the inner diameter side end. It has a lip 25a. Further, the elastic body 25 has a plurality of seal lips 25b and 25c that are in contact with the side surface 6ba of the ring portion 6b of the saddle ring 6 at a position on the outer diameter side of the seal lip 25a. In addition, in FIG. 5, each seal lip 25a-25c is shown in the shape in the natural state before contacting each surface 6aa and 6ba. Other configurations are the same as those in the first embodiment.

この発明の第１の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning 1st Embodiment of this invention. 同軸受装置におけるアウトボード側のシール部材の拡大断面図である。It is an expanded sectional view of the seal member of the outboard side in the bearing device. 同軸受装置におけるインボード側のシール部材の拡大断面図である。It is an expanded sectional view of the seal member by the side of an inboard in the bearing device. この発明の他の実施形態にかかる車輪用軸受装置の断面図である。It is sectional drawing of the wheel bearing apparatus concerning other embodiment of this invention. 同軸受装置におけるアウトボード側のシール部材の拡大断面図である。It is an expanded sectional view of the seal member of the outboard side in the bearing device. 従来の車輪用軸受装置の断面図である。It is sectional drawing of the conventional wheel bearing apparatus. 同軸受装置におけるアウトボード側の密封装置の拡大断面図である。It is an expanded sectional view of the sealing device of the outboard side in the bearing device. （Ａ）は同軸受装置における鍔輪へのスリンガの圧入作業の一例の説明図、（Ｂ）は同圧入作業の他の例の説明図である。(A) is explanatory drawing of an example of the press fit operation | work of the slinger to the collar ring in the same bearing apparatus, (B) is explanatory drawing of the other example of the press fit work.

符号の説明Explanation of symbols

１…外方部材
１ａ…転走面
２…内方部材
２ａ…転走面
３…ハブ輪
４…円錐ころ
５…内輪
５ａ…大鍔
６…鍔輪
６ａ…円筒状部
６ａａ…外周面
６ｂ…円輪部
６ｂａ…側面
８…シール部材
１１…ハブフランジ
２０…芯金
２０ａ…円筒部
２０ｂ…立板部
２１…弾性体
２１ａ〜２１ｃ…シールリップ
２２…芯金
２２ａ…円筒部
２２ｂ…立板部
２３…弾性体
２３ａ〜２３ｃ…シールリップ DESCRIPTION OF SYMBOLS 1 ... Outer member 1a ... Rolling surface 2 ... Inner member 2a ... Rolling surface 3 ... Hub ring 4 ... Tapered roller 5 ... Inner ring 5a ... Large collar 6 ... Collar ring 6a ... Cylindrical part 6aa ... Outer peripheral surface 6b ... Ring portion 6ba ... Side 8 ... Seal member 11 ... Hub flange 20 ... Core 20a ... Cylindrical portion 20b ... Vertical plate portion 21 ... Elastic body 21a-21c ... Seal lip 22 ... Core metal 22a ... Cylinder portion 22b ... Vertical plate portion 23 ... Elastic bodies 23a to 23c ... Seal lip

Claims (3)

内周に互いに小径側が隣合う複列の円錐状の転走面を有する外方部材と、この転走面に対向する複列の円錐状の転走面を有する内方部材と、これら内外の部材の転走面間に介在した複列の円錐ころとを備え、前記内方部材は、アウトボード側の端部付近の外周にハブフランジを有するハブ輪と、このハブ輪のインボード側の端部外周に嵌合した内輪とを有し、これらハブ輪および内輪に前記複列の転走面となる各列の転走面が形成され、前記内輪はインボード側に大鍔を有し、前記ハブ輪の外周におけるハブフランジに隣接する箇所に、アウトボード側列の円錐ころの大端に接する鍔輪を嵌合させた車輪用軸受装置において、
前記鍔輪にシールリップが接するシール部材を、前記外方部材の内周面におけるアウトボード側端に取り付け、前記鍔輪の前記シールリップが接する面を、表面粗さを平坦化させた平坦化加工面としたことを特徴とする車輪用軸受装置。 An outer member having a double row conical rolling surface adjacent to the inner diameter on the inner circumference, an inner member having a double row conical rolling surface facing the rolling surface, A double row tapered roller interposed between the rolling surfaces of the member, and the inner member includes a hub ring having a hub flange on an outer periphery near an end on the outboard side, and an inboard side of the hub ring. An inner ring fitted to the outer periphery of the end portion, and the hub ring and the inner ring are formed with each row of rolling surfaces as the double row rolling surface, and the inner ring has a large flange on the inboard side. In the wheel bearing device in which a saddle wheel in contact with the large end of the tapered roller of the outboard side row is fitted to a location adjacent to the hub flange on the outer periphery of the hub wheel,
A seal member that contacts the seal ring with the seal lip is attached to an end on the outboard side of the inner peripheral surface of the outer member, and the surface that contacts the seal lip of the collar is flattened with a flat surface roughness. A bearing device for a wheel, characterized by having a machined surface. 請求項１において、前記鍔輪の前記平坦化加工面は研削加工面である車輪用軸受装置。   The wheel bearing device according to claim 1, wherein the flattened surface of the saddle wheel is a ground surface. 請求項１または請求項２において、前記鍔輪は、ハブ輪の外周に嵌合する円筒状部と、この円筒状部のアウトボード側端から外径側に突出して一側面がハブフランジに接する円輪部とを有し、前記シール部材は、芯金およびこの芯金に固着された弾性体からなり、この弾性体は、前記鍔輪の円輪部の他側面に接するシールリップ、および前記円筒状部の外周面に接するシールリップを有するものである車輪用軸受装置。   In Claim 1 or Claim 2, the said saddle wheel protrudes to the outer diameter side from the outboard side end of the cylindrical part fitted to the outer periphery of the hub ring, and one side surface is in contact with the hub flange. The sealing member is made of a cored bar and an elastic body fixed to the cored bar, and the elastic body is a seal lip that is in contact with the other side of the ringed part of the saddle ring, and A wheel bearing device having a seal lip in contact with an outer peripheral surface of a cylindrical portion.
JP2005135596A 2005-05-09 2005-05-09 Bearing device for wheel Withdrawn JP2006312961A (en)

Priority Applications (1)

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Publications (1)

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JP2006312961A true JP2006312961A (en) 2006-11-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009052642A (en) * 2007-08-27 2009-03-12 Ntn Corp Vehicular bearing device
CN103629247A (en) * 2013-11-20 2014-03-12 江苏宏业轴承有限公司 Double-layered and double-row four-lip sealing ring roller bearing
DE112018001341T5 (en) 2017-03-16 2019-12-05 Ntn Corporation BEARING DEVICE FOR A VEHICLE WHEEL

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009052642A (en) * 2007-08-27 2009-03-12 Ntn Corp Vehicular bearing device
CN103629247A (en) * 2013-11-20 2014-03-12 江苏宏业轴承有限公司 Double-layered and double-row four-lip sealing ring roller bearing
CN103629247B (en) * 2013-11-20 2016-03-02 江苏宏业轴承有限公司 A kind of Double-layer double-row four lip seal circle roller bearing
DE112018001341T5 (en) 2017-03-16 2019-12-05 Ntn Corporation BEARING DEVICE FOR A VEHICLE WHEEL
US10767689B2 (en) 2017-03-16 2020-09-08 Ntn Corporation Bearing device for vehicle wheel

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