JP2008240948A - Rolling bearing device for wheel - Google Patents

Rolling bearing device for wheel Download PDF

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Publication number
JP2008240948A
JP2008240948A JP2007084370A JP2007084370A JP2008240948A JP 2008240948 A JP2008240948 A JP 2008240948A JP 2007084370 A JP2007084370 A JP 2007084370A JP 2007084370 A JP2007084370 A JP 2007084370A JP 2008240948 A JP2008240948 A JP 2008240948A
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Prior art keywords
sealing member
rolling bearing
bearing device
outer member
sealing
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JP2007084370A
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Japanese (ja)
Inventor
Shunya Ishiyama
峻也 石山
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JTEKT Corp
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JTEKT Corp
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Priority to JP2007084370A priority Critical patent/JP2008240948A/en
Publication of JP2008240948A publication Critical patent/JP2008240948A/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
    • F16C33/72—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
    • F16C33/783—Details of the sealing or parts thereof, e.g. geometry, material of the mounting region
    • 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device for a wheel capable of axially positioning a sealing member to an outer member easily. <P>SOLUTION: The rolling bearing device 1 for the wheel has an inner member 2, the outer member 4 and a sealing member 5 which has an axial lip 5b4. The sealing member 5 has a projection part 5b2 formed of an elastic material for radially projecting toward the outer member 4 which has a step part 4d to which the projection part 5b2 is inserted. The sealing member 5 is axially positioned to the outer member 4 by the projection part 5b2 and the step part 4d. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、転動体を介して相対回動する内方部材と外方部材と、これらの間を密封する密封部材とを有する車輪用転がり軸受装置に関する。   The present invention relates to a wheel rolling bearing device having an inner member and an outer member that rotate relative to each other via a rolling element, and a sealing member that seals between them.

従来、車輪用転がり軸受装置は、車輪が装着されるフランジを備える内方部材と、内方部材の外周側に配設される転動体と、その転動体を介して内方部材を回動可能に支持する外方部材と、内方部材と外方部材の間を密封する密封部材を備えている（特許文献１，２参照）。密封部材は、金属環と、金属環に一体に設けられる弾性体とを有しており、金属環は、外輪部材の内周面に圧入嵌合される。弾性体は、径方向に延出して内方部材の外周面に摺接するラジアルリップと、軸方向に延出してフランジの基端部に摺接するアキシアルリップを有している。アキシアルリップは、密封部材の外方部材に対する軸方向の位置、すなわち圧入量によってフランジとの距離が変化して密封効果が変わる。そのため密封部材の外方部材に対する位置を注意しつつ密封部材を外方部材に組付ける必要がある。
実開平４−１３０５０４号公報 特開２００５−２９１２３１号公報 2. Description of the Related Art Conventionally, a wheel rolling bearing device is provided with an inner member having a flange on which a wheel is mounted, a rolling element disposed on the outer peripheral side of the inner member, and the inner member can be rotated via the rolling element. And an outer member that is supported on the inner member and a sealing member that seals between the inner member and the outer member (see Patent Documents 1 and 2). The sealing member has a metal ring and an elastic body provided integrally with the metal ring, and the metal ring is press-fitted to the inner peripheral surface of the outer ring member. The elastic body has a radial lip that extends in the radial direction and slidably contacts the outer peripheral surface of the inner member, and an axial lip that extends in the axial direction and slidably contacts the proximal end portion of the flange. The axial lip changes its sealing effect by changing the distance from the flange according to the axial position of the sealing member relative to the outer member, that is, the amount of press fit. Therefore, it is necessary to assemble the sealing member to the outer member while paying attention to the position of the sealing member with respect to the outer member.
Japanese Utility Model Publication No. 4-130504 JP 2005-291231 A

そこで本発明は、密封部材を内方部材または外方部材に対して容易に軸方向に位置決めできる車輪用転がり軸受装置を提供することを課題とする。   Then, this invention makes it a subject to provide the rolling bearing apparatus for wheels which can position a sealing member to an axial direction with respect to an inner member or an outer member easily.

前記課題を解決するために本発明は、各請求項に記載の通りの構成を備える軸受用密封部材であることを特徴とする。すなわち請求項１に記載の発明によると、内方部材と外方部材と密封部材を有し、密封部材が内方部材と外方部材のいずれか一方の部材に取付けられ、かつ軸方向に延出していずれか他方の部材側に摺接するアキシアルリップを有している。密封部材は、弾性材料から形成されかつ一方の部材に向けて突出する突出部を有し、一方の部材は、突出部が突入される段部を有している。そして突出部と段部によって密封部材の一方の部材に対する軸方向の位置決めを成す。   In order to solve the above-mentioned problems, the present invention is a bearing sealing member having a configuration as described in each claim. That is, according to the first aspect of the invention, the inner member, the outer member, and the sealing member are provided, the sealing member is attached to one of the inner member and the outer member, and extends in the axial direction. It has an axial lip that comes out and slidably contacts one of the other members. The sealing member has a protruding portion that is formed of an elastic material and protrudes toward one member, and the one member has a step portion into which the protruding portion is inserted. The protruding portion and the stepped portion form an axial position with respect to one member of the sealing member.

したがって密封部材が一方の部材に対して軸方向に位置決めされることで、アキシアルリップの他方の部材側に対する軸方向の距離が決定される。かくしてアキシアルリップによる密封効果を確実に得ることができる。   Therefore, when the sealing member is positioned in the axial direction with respect to one member, the axial distance with respect to the other member side of the axial lip is determined. Thus, the sealing effect by the axial lip can be reliably obtained.

請求項２に記載の発明によると、密封部材は、金属環と、その金属環に一体に設けられる弾性体を有している。弾性体は、アキシアルリップと突出部を有するとともに、内方部材の外周面または外方部材の内周面に圧入嵌合される嵌合部を有している。そして密封部材を一方の部材に圧入することで嵌合部が弾性変形し、突出部が段部に突入することで、突出部と段部によって嵌合部の弾性戻りによる軸方向の移動を規制する構成になっている。   According to invention of Claim 2, the sealing member has a metal ring and the elastic body integrally provided in the metal ring. The elastic body has an axial lip and a protruding portion, and also has a fitting portion that is press-fitted to the outer peripheral surface of the inner member or the inner peripheral surface of the outer member. Then, the fitting part is elastically deformed by press-fitting the sealing member into one member, and the protruding part protrudes into the step part, thereby restricting axial movement due to the elastic return of the fitting part by the protruding part and the step part. It is configured to do.

ところで従来の密封部材は、金属環と弾性体を有し、金属環の外周面が外方部材の内周面等に圧入嵌合される形態であった（特許文献１，２参照）。そのため密封部材の外方部材等に対する軸方向の位置を比較的容易に所定位置にすることが可能である。これに対して本発明に係る弾性体は、圧入嵌合される嵌合部を有している。そのため弾性体の嵌合部によって密封効果が高くなる一方で、圧入時に嵌合部が弾性変形し、その弾性戻りによって一方の部材に対して軸方向に位置ずれするおそれが高い構成になっている。ところが本発明は、弾性体が突出部を有し、突出部が一方の部材の段部に突入することで、嵌合部の弾性戻りによる密封部材の軸方向の戻りが規制される。かくして密封部材は、一方の部材に対して容易に軸方向に位置決めされ得る。   Incidentally, the conventional sealing member has a metal ring and an elastic body, and the outer peripheral surface of the metal ring is press-fitted into the inner peripheral surface of the outer member (see Patent Documents 1 and 2). Therefore, the axial position of the sealing member relative to the outer member or the like can be relatively easily set to the predetermined position. On the other hand, the elastic body according to the present invention has a fitting portion that is press-fitted. Therefore, while the sealing effect is enhanced by the fitting portion of the elastic body, the fitting portion is elastically deformed at the time of press-fitting, and there is a high risk of being displaced in the axial direction with respect to one member due to the elastic return. . However, in the present invention, the elastic body has a protruding portion, and the protruding portion enters the stepped portion of one member, whereby the axial return of the sealing member due to the elastic return of the fitting portion is restricted. Thus, the sealing member can be easily positioned axially relative to one member.

請求項３に記載の発明によると、段部と突出部は、内方部材、外方部材または密封部材の全周に渡って形成されている。したがって密封部材は、周方向の位置に関わらず、内方部材および外方部材に対して確実に軸方向に位置決めされ得る。かくして密封部材を容易に内方部材または外方部材に組付けることができる。   According to the invention described in claim 3, the step portion and the projecting portion are formed over the entire circumference of the inner member, the outer member, or the sealing member. Therefore, the sealing member can be reliably positioned in the axial direction with respect to the inner member and the outer member regardless of the position in the circumferential direction. Thus, the sealing member can be easily assembled to the inner member or the outer member.

（実施の形態１）
実施の形態１を図１，２にしたがって説明する。図１に示すように転がり軸受装置１は、図１に示すようにハブ軸部材２と内輪部材３から構成される内方部材と、内方部材を回動可能に支持する外方部材４を有している。ハブ軸部材２は、一端部外周にフランジ２ａを有し、フランジ２ａに圧入されたボルト２ｄに車輪が取付けられる。ハブ軸部材２の他端部外周面には、内輪部材３が嵌合される小径円筒部２ｃが形成されている。ハブ軸部材２と内輪部材３の外周面のそれぞれに転動体６が設置される軌道面２ｂ，３ａが形成されている。内輪部材３は、小径円筒部２ｃの先端を拡径して、かしめることによりハブ軸部材２に固定されている。 (Embodiment 1)
The first embodiment will be described with reference to FIGS. As shown in FIG. 1, the rolling bearing device 1 includes an inner member composed of a hub shaft member 2 and an inner ring member 3, and an outer member 4 that rotatably supports the inner member, as shown in FIG. Have. The hub shaft member 2 has a flange 2a on the outer periphery of one end, and a wheel is attached to a bolt 2d press-fitted into the flange 2a. A small-diameter cylindrical portion 2 c into which the inner ring member 3 is fitted is formed on the outer peripheral surface of the other end portion of the hub shaft member 2. Track surfaces 2b and 3a on which the rolling elements 6 are installed are formed on the outer peripheral surfaces of the hub shaft member 2 and the inner ring member 3, respectively. The inner ring member 3 is fixed to the hub shaft member 2 by expanding and crimping the tip of the small diameter cylindrical portion 2c.

外方部材４は、図１に示すように外周面に車体側の部材（ナックル等）に取付けられる取付フランジ４ａを有している。外方部材４の内周面には、二列の軌道面４ｂが形成されており、軌道面４ｂ，４ｂと軌道面２ｂ，３ａの間に複数の転動体６が二列に配されている。二列の転動体６は、各列毎に保持器７によって周方向に所定間隔に保持されている。   As shown in FIG. 1, the outer member 4 has a mounting flange 4a attached to a vehicle body side member (knuckle or the like) on the outer peripheral surface. Two rows of raceway surfaces 4b are formed on the inner peripheral surface of the outer member 4, and a plurality of rolling elements 6 are arranged in two rows between the raceway surfaces 4b and 4b and the raceway surfaces 2b and 3a. . Two rows of rolling elements 6 are held at predetermined intervals in the circumferential direction by a holder 7 for each row.

ハブ軸部材２のフランジ２ａの基端部と外方部材４の間には、図２に示すようにこれらの間の環状空間を密封する環状の密封部材５が設けられている。密封部材５は、環状の金属環５ａと金属環５ａに一体に設けられる環状の弾性体５ｂを有している。金属環５ａは、ステンレス鋼などの金属製であって、外側円筒部５ａ１と、外側円筒部５ａ１の一端から径方向中心に延出する円環部５ａ２と、円環部５ａ２の内周端から軸方向に延出する内側円筒部５ａ３を一体に有している。   Between the base end portion of the flange 2a of the hub shaft member 2 and the outer member 4, an annular sealing member 5 for sealing an annular space between them is provided as shown in FIG. The sealing member 5 includes an annular metal ring 5a and an annular elastic body 5b provided integrally with the metal ring 5a. The metal ring 5a is made of metal such as stainless steel, and includes an outer cylindrical part 5a1, an annular part 5a2 extending from one end of the outer cylindrical part 5a1 in the radial center, and an inner peripheral end of the annular part 5a2. An inner cylindrical portion 5a3 extending in the axial direction is integrally provided.

弾性体５ｂは、ゴムまたは合成樹脂等の弾性材料から形成されており、図２に示すように外側円筒部５ａ１の外周面全体を覆う嵌合部５ｂ１と、嵌合部５ｂ１の一端から円環部５ａ２に沿って径方向中心に延出する覆い部５ｂ３と、覆い部５ｂ３から軸方向に延出するアキシアルリップ５ｂ４と、覆い部５ｂ３から径方向中心に延出する二枚のラジアルリップ５ｂ５，５ｂ６を有している。   The elastic body 5b is made of an elastic material such as rubber or synthetic resin, and as shown in FIG. 2, a fitting portion 5b1 that covers the entire outer peripheral surface of the outer cylindrical portion 5a1, and a ring from one end of the fitting portion 5b1 A cover portion 5b3 extending in the radial direction along the portion 5a2, an axial lip 5b4 extending in the axial direction from the cover portion 5b3, and two radial lips 5b5 extending in the radial direction from the cover portion 5b3. 5b6.

嵌合部５ｂ１は、図２に示すように外方部材４の内周側に圧入されることで弾性変形されて外方部材４の内周面に圧入嵌合される。嵌合部５ｂ１の先端部には、径方向外方に突出する突出部５ｂ２が形成されている。突出部５ｂ２は、密封部材５の全周に渡って環状に形成されており、外方部材４に形成された段部４ｄに突入する。   As shown in FIG. 2, the fitting portion 5 b 1 is elastically deformed by being press-fitted to the inner peripheral side of the outer member 4 and is press-fitted to the inner peripheral surface of the outer member 4. A protruding portion 5b2 that protrudes radially outward is formed at the distal end of the fitting portion 5b1. The protruding portion 5 b 2 is formed in an annular shape over the entire circumference of the sealing member 5, and enters the step portion 4 d formed on the outer member 4.

外方部材４の段部４ｄは、図２に示すように外方部材４の内周面に凹状に形成されている。段部４ｄは、外方部材４の一端部４ｃの内周面に全周に渡って環状に形成されている。したがって密封部材５は、嵌合部５ｂ１と突出部５ｂ２が弾性変形されつつ外方部材４に圧入され、突出部５ｂ２が段部４ｄに到達した際に、突出部５ｂ２が弾性戻りをして段部４ｄに突入する。   The step 4d of the outer member 4 is formed in a concave shape on the inner peripheral surface of the outer member 4 as shown in FIG. The step portion 4d is formed in an annular shape over the entire circumference on the inner peripheral surface of the one end portion 4c of the outer member 4. Therefore, the sealing member 5 is press-fitted into the outer member 4 while the fitting portion 5b1 and the protruding portion 5b2 are elastically deformed, and when the protruding portion 5b2 reaches the stepped portion 4d, the protruding portion 5b2 elastically returns to the stepped portion. It rushes into part 4d.

段部４ｄは、図２に示すように突出部５ｂ２に対して立設する立設面４ｄ１を有している。したがって密封部材５は、圧入時に嵌合部５ｂ１が弾性変形して、その弾性戻り力によって軸方向に戻ろうとするが、立設面４ｄ１によってその移動が規制される。かくして密封部材５は、外方部材４に対して所定位置に位置決めされる。   As shown in FIG. 2, the step portion 4d has a standing surface 4d1 that stands up with respect to the protruding portion 5b2. Therefore, the fitting part 5b1 is elastically deformed when the sealing member 5 is press-fitted and attempts to return to the axial direction by the elastic return force, but the movement of the sealing member 5 is restricted by the standing surface 4d1. Thus, the sealing member 5 is positioned at a predetermined position with respect to the outer member 4.

アキシアルリップ５ｂ４は、図２に示すように軸方向に延出して、ハブ軸部材２のフランジ２ａの基端部側面に摺接する。ラジアルリップ５ｂ５，５ｂ６は、径方向に延出してハブ軸部材２の外周面に摺接する。したがって密封部材５は、外方部材４の一端部４ｃとハブ軸部材２の間を密封する。図１に示すように外方部材４の他端部（図１左端部）と内輪部材３の間にも、これらの間を密封する密封部材８が設けられている。そして密封部材５，８の間には、グリースが充填される。   As shown in FIG. 2, the axial lip 5 b 4 extends in the axial direction and is in sliding contact with the base end side surface of the flange 2 a of the hub shaft member 2. The radial lips 5b5 and 5b6 extend in the radial direction and come into sliding contact with the outer peripheral surface of the hub shaft member 2. Therefore, the sealing member 5 seals between the one end 4 c of the outer member 4 and the hub shaft member 2. As shown in FIG. 1, a sealing member 8 that seals between the other end portion (left end portion in FIG. 1) of the outer member 4 and the inner ring member 3 is also provided. The space between the sealing members 5 and 8 is filled with grease.

以上のようにして実施の形態１が形成されている。すなわち密封部材５は、弾性材料から形成されかつ外方部材４に向けて径方向に突出する突出部５ｂ２を有し、外方部材４は、突出部５ｂ２が突入される段部４ｄを有している。そして突出部５ｂ２と段部４ｄによって密封部材５の外方部材４に対する軸方向の位置決めを成す。   The first embodiment is formed as described above. That is, the sealing member 5 has a protruding portion 5b2 formed of an elastic material and protruding radially toward the outer member 4, and the outer member 4 has a step portion 4d into which the protruding portion 5b2 is inserted. ing. And the positioning of the axial direction with respect to the outer member 4 of the sealing member 5 is comprised by the protrusion part 5b2 and the step part 4d.

したがって密封部材５が外方部材４に対して軸方向に位置決めされる。そして外方部材４とハブ軸部材２は、転動体６を介して軸方向に位置決めされる。そのためアキシアルリップ５ｂ４は、ハブ軸部材２のフランジ２ａに対して軸方向に位置決めされる。かくしてアキシアルリップ５ｂ４による密封効果を確実に得ることができる。   Accordingly, the sealing member 5 is positioned in the axial direction with respect to the outer member 4. The outer member 4 and the hub shaft member 2 are positioned in the axial direction via the rolling elements 6. Therefore, the axial lip 5b4 is positioned in the axial direction with respect to the flange 2a of the hub shaft member 2. Thus, the sealing effect by the axial lip 5b4 can be reliably obtained.

ところで従来の密封部材は、金属環と弾性体を有し、金属環の外周面が直接外方部材の内周面等に圧入嵌合される形態であった。そのため密封部材の外方部材等に対する軸方向の位置を比較的容易に所定位置にすることが可能である。これに対して本形態に係る弾性体５ｂは、圧入嵌合される嵌合部５ｂ１を有している。そのため弾性体５ｂの嵌合部５ｂ１によって密封効果が高くなる一方で、圧入時に嵌合部５ｂ１が弾性変形し、その弾性戻りによって外方部材４に対して軸方向に位置ずれするおそれが高い構成になっている。ところが本形態は、弾性体５ｂが突出部５ｂ２を有し、突出部５ｂ２が外方部材４の段部４ｂに突入することで、嵌合部５ｂ１の弾性戻りによる密封部材５の軸方向の戻りが規制される。かくして密封部材５は、外方部材４に対して容易に軸方向に位置決めされ得る。   By the way, the conventional sealing member has a metal ring and an elastic body, and the outer peripheral surface of the metal ring is directly press-fitted into the inner peripheral surface of the outer member. Therefore, the axial position of the sealing member relative to the outer member or the like can be relatively easily set to the predetermined position. On the other hand, the elastic body 5b according to this embodiment has a fitting portion 5b1 to be press-fitted and fitted. Therefore, while the sealing effect is enhanced by the fitting portion 5b1 of the elastic body 5b, the fitting portion 5b1 is elastically deformed at the time of press-fitting and is highly likely to be displaced in the axial direction with respect to the outer member 4 due to the elastic return. It has become. However, in this embodiment, the elastic body 5b has the protruding portion 5b2, and the protruding portion 5b2 protrudes into the stepped portion 4b of the outer member 4, so that the sealing member 5 is returned in the axial direction by the elastic return of the fitting portion 5b1. Is regulated. Thus, the sealing member 5 can be easily positioned axially with respect to the outer member 4.

また段部４ｄと突出部５ｂ２は、外方部材４と密封部材５の全周に渡って形成されている。したがって密封部材５は、周方向の位置に関わらず、外方部材４に対して確実に軸方向に位置決めされ得る。そのため密封部材５を容易に外方部材４に組付けることができる。   Further, the step portion 4 d and the protruding portion 5 b 2 are formed over the entire circumference of the outer member 4 and the sealing member 5. Therefore, the sealing member 5 can be reliably positioned in the axial direction with respect to the outer member 4 regardless of the position in the circumferential direction. Therefore, the sealing member 5 can be easily assembled to the outer member 4.

（実施の形態２）
実施の形態２は、実施の形態１とほぼ同様に形成されている。しかし実施の形態２は、図２に示す突出部５ｂ２と段部４ｄに代えて、図３に示す突出部５ｂ７と段部４ｅを有している。以下、相違点を中心に実施の形態２について説明する。 (Embodiment 2)
The second embodiment is formed in substantially the same manner as the first embodiment. However, the second embodiment has a protruding portion 5b7 and a step portion 4e shown in FIG. 3 instead of the protruding portion 5b2 and the step portion 4d shown in FIG. Hereinafter, the second embodiment will be described focusing on the differences.

密封部材５の弾性体５ｂは、図３に示すように突出部５ｂ７を有している。突出部５ｂ７は、弾性体５ｂの嵌合部５ｂ１の略中央領域から径方向外方に突出しており、密封部材５の全周に渡って形成されている。外方部材４は、突出部５ｂ７に対応する内周面に段部４ｅを有している。段部４ｅは、外方部材４の一端部４ｃの内周面に凹状に形成されており、外方部材４の全周に渡って環状に形成されている。そしてこの段部４ｅに突出部５ｂ７が突入される。   The elastic body 5b of the sealing member 5 has a protruding portion 5b7 as shown in FIG. The protruding portion 5b7 protrudes radially outward from the substantially central region of the fitting portion 5b1 of the elastic body 5b, and is formed over the entire circumference of the sealing member 5. The outer member 4 has a stepped portion 4e on the inner peripheral surface corresponding to the protruding portion 5b7. The step portion 4 e is formed in a concave shape on the inner peripheral surface of the one end portion 4 c of the outer member 4, and is formed in an annular shape over the entire periphery of the outer member 4. And the protrusion part 5b7 rushes into this step part 4e.

段部４ｅは、突出部５ｂ７に対して立設する立設面４ｅ１，４ｅ２を有している。立設面４ｅ１は、密封部材５の外方部材４に対する軸方向の抜けを防止する。したがって密封部材５を外方部材４に圧入することで嵌合部５ｂ１が弾性変形し、その弾性戻りによって密封部材５が軸方向に戻る量が突出部５ｂ７と段部４ｅによって規制される。一方、立設面４ｅ２は、密封部材５の外方部材４に対する軸方向の挿入過ぎを防止する。これにより密封部材５は、突出部５ｂ７と段部４ｅによって軸方向に位置決めされ得る。   The step portion 4e has standing surfaces 4e1 and 4e2 that stand up with respect to the protruding portion 5b7. The standing surface 4e1 prevents the sealing member 5 from coming off from the outer member 4 in the axial direction. Therefore, when the sealing member 5 is press-fitted into the outer member 4, the fitting portion 5b1 is elastically deformed, and the amount by which the sealing member 5 returns in the axial direction by the elastic return is regulated by the protruding portion 5b7 and the step portion 4e. On the other hand, the standing surface 4e2 prevents excessive insertion of the sealing member 5 in the axial direction with respect to the outer member 4. Thereby, the sealing member 5 can be positioned in the axial direction by the protruding portion 5b7 and the stepped portion 4e.

（実施の形態３）
実施の形態３は、実施の形態１とほぼ同様に形成されている。しかし実施の形態３は、図２に示す突出部５ｂ２と段部４ｄに代えて、図４に示す突出部５ｂ８と窪み部５ｂ９および段部４ｆ，４ｇを有している。以下、相違点を中心に実施の形態３について説明する。 (Embodiment 3)
The third embodiment is formed in substantially the same manner as the first embodiment. However, the third embodiment has a protruding portion 5b8, a recessed portion 5b9, and step portions 4f and 4g shown in FIG. 4 instead of the protruding portion 5b2 and the step portion 4d shown in FIG. Hereinafter, Embodiment 3 will be described focusing on the differences.

密封部材５の弾性体５ｂは、図４に示すように突出部５ｂ８と窪み部５ｂ９を有している。突出部５ｂ８は、弾性体５ｂの嵌合部５ｂ１の先端領域に形成されており、窪み部５ｂ９は、嵌合部５ｂ１の略中央領域に形成されている。突出部５ｂ８と窪み部５ｂ９は、密封部材５の全周に渡って形成されている。突出部５ｂ８と窪み部５ｂ９に対応する外方部材４の内周面には、段部４ｆ，４ｇが形成されている。段部４ｆには、突出部５ｂ８が突入され、窪み部５ｂ９には段部４ｇが突入される。これら段部４ｆ，４ｇは、外方部材４の一端部４ｃの全周に渡って環状に形成されている。   The elastic body 5b of the sealing member 5 has a protruding portion 5b8 and a recessed portion 5b9 as shown in FIG. The protrusion 5b8 is formed in the tip end region of the fitting portion 5b1 of the elastic body 5b, and the recess 5b9 is formed in the substantially central region of the fitting portion 5b1. The protrusion 5b8 and the recess 5b9 are formed over the entire circumference of the sealing member 5. Step portions 4f and 4g are formed on the inner peripheral surface of the outer member 4 corresponding to the protruding portion 5b8 and the recessed portion 5b9. The protruding portion 5b8 enters the stepped portion 4f, and the stepped portion 4g enters the recessed portion 5b9. These step portions 4 f and 4 g are formed in an annular shape over the entire circumference of the one end portion 4 c of the outer member 4.

段部４ｆは、突出部５ｂ８に対して立設する立設面４ｆ１を有しており、立設面４ｆ１によって密封部材５の外方部材４に対する軸方向の抜けを防止する。そのため密封部材５を外方部材４に圧入した際に嵌合部５ｂ１が弾性変形し、その弾性戻りによって密封部材５が軸方向に戻ろうとする移動量が突出部５ｂ８と段部４ｆによって規制される。一方、段部４ｇは、弾性体５ｂの嵌合部５ｂ１の窪み部５ｂ９の間において立設する立設面４ｇ１を有している。そして立設面４ｇ１によって密封部材５の外方部材４に対する軸方向の挿入過ぎを防止する。これによって密封部材５の位置を突出部５ｂ８と窪み部５ｂ９および段部４ｆ，４ｇによって決定することができる。   The step portion 4f has a standing surface 4f1 that stands up with respect to the protruding portion 5b8, and the standing surface 4f1 prevents the sealing member 5 from coming off from the outer member 4 in the axial direction. Therefore, when the sealing member 5 is press-fitted into the outer member 4, the fitting portion 5b1 is elastically deformed, and the amount of movement of the sealing member 5 to return in the axial direction by the elastic return is regulated by the projecting portion 5b8 and the step portion 4f. The On the other hand, the step portion 4g has a standing surface 4g1 that stands between the recess portions 5b9 of the fitting portion 5b1 of the elastic body 5b. And the excessive insertion in the axial direction with respect to the outer member 4 of the sealing member 5 is prevented by the standing surface 4g1. Thereby, the position of the sealing member 5 can be determined by the protruding portion 5b8, the recessed portion 5b9, and the step portions 4f and 4g.

（他の実施の形態）
本発明は、上記実施の形態に限定されず、以下の形態等であっても良い。
（１）例えば実施の形態１〜３の密封部材５は、図２に示すように外方部材４の内周面に取付けられ、内方部材であるハブ軸部材２に摺接する形態であった。しかし密封部材が内方部材の外周面に取付けられ、外方部材に摺接する形態等であっても良い。
（２）実施の形態１〜３の密封部材５のアキシアルリップ５ｂ４は、ハブ軸部材２のフランジ２ａの基端部に摺接する形態であった。しかし密封部材がいわゆるパックシールであって、ハブ軸部材の外周面等に圧入嵌合される金属環を有し、その金属間にアキシアルリップが軸方向に延出しかつ摺接する形態等であっても良い。
（３）実施の形態１〜３の密封部材５の弾性体５ｂは、嵌合部５ｂ１を有し、嵌合部５ｂ１が金属環５ａの外周面全てを覆いかつ外方部材４に圧入嵌合される形態であった。しかし金属環が弾性体によって覆われていない一部を有し、その一部が外方部材の内周面に圧入嵌合される形態等であっても良い。
（４）実施の形態１〜３の段部４ｄ〜４ｇと突出部５ｂ２，５ｂ７，５ｂ８は、外方部材４または密封部材５の全周に渡って形成されていた。しかしこれらのうちの少なくとも一つが周方向の一部のみに形成される形態であっても良い。
（５）実施の形態１〜３の弾性体５ｂの一端部は、図２〜４に示すように金属環５ａの外側円筒部５ａ１の先端位置まで延設されていた。しかし弾性体の一端部からさらに外側円筒部の先端を覆って外側円筒部５ａ１の内周面まで延出し、嵌合部の金属環からのめくれを防止するめくれ防止部を有している形態等であっても良い。 (Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) For example, the sealing member 5 of the first to third embodiments is attached to the inner peripheral surface of the outer member 4 as shown in FIG. 2, and is in a form of sliding contact with the hub shaft member 2 that is the inner member. . However, the sealing member may be attached to the outer peripheral surface of the inner member and slidably contact the outer member.
(2) The axial lip 5 b 4 of the sealing member 5 according to the first to third embodiments is in a form of sliding contact with the proximal end portion of the flange 2 a of the hub shaft member 2. However, the sealing member is a so-called pack seal, has a metal ring that is press-fitted onto the outer peripheral surface of the hub shaft member, etc., and the axial lip extends in the axial direction and slidably contacts between the metals. Also good.
(3) The elastic body 5b of the sealing member 5 of the first to third embodiments has a fitting portion 5b1, and the fitting portion 5b1 covers the entire outer peripheral surface of the metal ring 5a and is press-fitted to the outer member 4. It was a form to be. However, the metal ring may have a part that is not covered by the elastic body, and a part of the metal ring may be press-fitted into the inner peripheral surface of the outer member.
(4) The step portions 4 d to 4 g and the protruding portions 5 b 2, 5 b 7, and 5 b 8 in the first to third embodiments are formed over the entire circumference of the outer member 4 or the sealing member 5. However, at least one of these may be formed in only a part in the circumferential direction.
(5) One end of the elastic body 5b of Embodiments 1 to 3 was extended to the tip of the outer cylindrical portion 5a1 of the metal ring 5a as shown in FIGS. However, a form having an anti-turning portion that covers the tip of the outer cylindrical portion from one end portion of the elastic body and extends to the inner peripheral surface of the outer cylindrical portion 5a1, and prevents the fitting portion from turning over from the metal ring. It may be.

車輪用転がり軸受装置の断面図である。It is sectional drawing of the rolling bearing apparatus for wheels. フランジの基端部近傍における車輪用転がり軸受装置の一部断面拡大図である。It is a partial cross section enlarged view of the rolling bearing device for wheels in the base end part vicinity of a flange. 実施の形態２に係る外輪部材の段部近傍における車輪用転がり軸受装置の一部断面拡大図である。FIG. 6 is an enlarged partial cross-sectional view of a wheel rolling bearing device in the vicinity of a step portion of an outer ring member according to a second embodiment. 実施の形態３に係る外輪部材の段部近傍における車輪用転がり軸受装置の一部断面拡大図である。FIG. 10 is a partial cross-sectional enlarged view of a wheel rolling bearing device in the vicinity of a step portion of an outer ring member according to a third embodiment.

符号の説明Explanation of symbols

１・・・軸受装置
２・・・ハブ軸部材（内方部材）
２ａ・・・フランジ
２・・・外方部材
３・・・内輪部材（内方部材）
４・・・外方部材
４ａ・・・取付フランジ
４ｂ〜４ｇ・・・段部
５，８・・・密封部材
５ａ・・・金属環
５ｂ・・・弾性体
５ｂ２，５ｂ７，５ｂ８・・・突出部
５ｂ４・・・アキシアルリップ
５ｂ５，５ｂ６・・・ラジアルリップ
６・・・転動体

DESCRIPTION OF SYMBOLS 1 ... Bearing apparatus 2 ... Hub shaft member (inner member)
2a ... Flange 2 ... Outer member 3 ... Inner ring member (inner member)
4 ... Outer member 4a ... Mounting flanges 4b to 4g ... Steps 5, 8 ... Sealing member 5a ... Metal ring 5b ... Elastic bodies 5b2, 5b7, 5b8 ... Projection Part 5b4 ... Axial lip 5b5, 5b6 ... Radial lip 6 ... Rolling element

Claims (3)

転動体を介して相対回動する内方部材と外方部材と、これらの間の環状空間を密封する環状の密封部材とを有し、前記密封部材が前記内方部材と前記外方部材のいずれか一方の部材に取付けられ、かつ軸方向に延出していずれか他方の部材側に摺接するアキシアルリップを有する車輪用転がり軸受装置であって、
前記密封部材は、弾性材料から形成されかつ前記一方の部材に向けて径方向に突出する突出部を有し、前記一方の部材は、前記突出部が突入される段部を有し、前記突出部と前記段部によって前記密封部材の前記一方の部材に対する軸方向の位置決めを成すことを特徴とする車輪用転がり軸受装置。 An inner member and an outer member that rotate relative to each other via a rolling element, and an annular sealing member that seals an annular space between the inner member and the outer member, and the sealing member includes the inner member and the outer member. A rolling bearing device for a wheel having an axial lip attached to any one member and extending in the axial direction and slidingly contacting any one of the other members,
The sealing member is formed of an elastic material and has a protruding portion that protrudes in a radial direction toward the one member. The one member has a step portion into which the protruding portion is inserted, and the protrusion A rolling bearing device for a wheel, characterized in that the axial positioning of the sealing member with respect to the one member is performed by a portion and the stepped portion. 請求項１に記載の車輪用転がり軸受装置であって、
密封部材は、金属環と、その金属環に一体に設けられる弾性体を有し、
前記弾性体は、前記アキシアルリップと前記突出部を有するとともに、内方部材の外周面または外方部材の内周面に圧入嵌合される嵌合部を有し、
前記密封部材を前記一方の部材に圧入することで前記嵌合部が弾性変形し、前記突出部が前記段部に突入することで、前記突出部と前記段部によって前記嵌合部の弾性戻りによる軸方向の移動を規制する構成になっていることを特徴とする車輪用転がり軸受装置。 It is a rolling bearing device for wheels according to claim 1,
The sealing member has a metal ring and an elastic body provided integrally with the metal ring,
The elastic body has the axial lip and the protruding portion, and has a fitting portion that is press-fitted to the outer peripheral surface of the inner member or the inner peripheral surface of the outer member,
The fitting part is elastically deformed by press-fitting the sealing member into the one member, and the protrusion returns to the elastic return of the fitting part by the protrusion and the step part. A rolling bearing device for a wheel, characterized in that the movement in the axial direction is restricted. 請求項１または２に記載の車輪用転がり軸受装置であって、
段部と突出部は、内方部材、外方部材または密封部材の全周に渡って形成されていることを特徴とする車輪用転がり軸受装置。


It is a rolling bearing device for wheels according to claim 1 or 2,
The rolling bearing device for wheels, wherein the stepped portion and the protruding portion are formed over the entire circumference of the inner member, the outer member, or the sealing member.


JP2007084370A 2007-03-28 2007-03-28 Rolling bearing device for wheel Pending JP2008240948A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010169186A (en) * 2009-01-22 2010-08-05 Ntn Corp Roller bearing
JP2013190082A (en) * 2012-03-15 2013-09-26 Jtekt Corp Rolling bearing device
US20220355615A1 (en) * 2021-05-07 2022-11-10 Aktiebolaget Skf Secondary sealing device for wheel bearing assemblies

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005291231A (en) * 2004-03-31 2005-10-20 Koyo Seiko Co Ltd Assembling method of double row tapered roller bearing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005291231A (en) * 2004-03-31 2005-10-20 Koyo Seiko Co Ltd Assembling method of double row tapered roller bearing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010169186A (en) * 2009-01-22 2010-08-05 Ntn Corp Roller bearing
JP2013190082A (en) * 2012-03-15 2013-09-26 Jtekt Corp Rolling bearing device
US20220355615A1 (en) * 2021-05-07 2022-11-10 Aktiebolaget Skf Secondary sealing device for wheel bearing assemblies
US11668348B2 (en) * 2021-05-07 2023-06-06 Aktiebolaget Skf Secondary sealing device for wheel bearing assemblies

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