JP2008008448A - Sealing device of rolling bearing - Google Patents

Sealing device of rolling bearing Download PDF

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Publication number
JP2008008448A
JP2008008448A JP2006181538A JP2006181538A JP2008008448A JP 2008008448 A JP2008008448 A JP 2008008448A JP 2006181538 A JP2006181538 A JP 2006181538A JP 2006181538 A JP2006181538 A JP 2006181538A JP 2008008448 A JP2008008448 A JP 2008008448A
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outer ring
peripheral surface
seal
cylindrical portion
ring
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Japanese (ja)
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Tatsunori Mori
達規 森
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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
    • F16C33/78—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
    • F16C33/7879—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 further sealing 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
    • F16C33/7816—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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device of a rolling bearing capable of easily measuring press-in position of a cylindrical part of a core with respect to an outer ring. <P>SOLUTION: A seal member 61 includes a core 62 having a cylindrical part 63 pressed in the inside surface of the outer ring 40, and an elastic body 65 formed on the core 62 in the form of a cover. The elastic body 65 has a seal part 68 sealing an area between the cylindrical part 63 of the core 62 and the outer ring 40. The seal part 68 is formed into a lip-like shape projecting toward the outside in the radial direction from the circumferential surface of a tip of the cylindrical part 63 of the core 62, and is elastically bent and tightly fitted to the inside surface in the vicinity of an opening of the outer ring 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、内輪と外輪との間の環状空間を密封するためのシール部材を備えた転がり軸受の密封装置に関する。   The present invention relates to a rolling bearing sealing device including a sealing member for sealing an annular space between an inner ring and an outer ring.

この種の転がり軸受の密封装置においては、例えば、特許文献１に開示されている。
このような転がり軸受の密封装置においては、図４と図５に示すように、芯金１６２と弾性体１６５を有するシール部材１６１は、その芯金１６２の筒部１６３が外輪１４０の一端開口部側から内周面に所定量だけ圧入されて組み付けられる。
また、シール部材１６１の弾性体１６５には、芯金１６２の突輪部１６４とスリンガ１７０との間をシールする内側のシールリップ１６６と、芯金１６２の筒部１６３の先端部と外輪１４０の内周面との間をシールする外側のシール部１６８とを有している。
また、外側のシール部１６８は、芯金１６２の筒部１６３の先端部外周面から断面台形状をなして突出されており、外側のシール部１６８の外径寸法は、芯金１６２の筒部１６３の外径寸法及び外輪１４０の圧入部の内径寸法よりも適宜に大きく設定されている。
特開２００１−６５７０４号公報 This type of rolling bearing sealing device is disclosed in, for example, Patent Document 1.
In such a rolling bearing sealing device, as shown in FIG. 4 and FIG. 5, the seal member 161 having the cored bar 162 and the elastic body 165 has the cylindrical part 163 of the cored bar 162 as one end opening of the outer ring 140. A predetermined amount is press-fitted into the inner peripheral surface from the side and assembled.
Further, the elastic body 165 of the seal member 161 includes an inner seal lip 166 that seals between the protruding ring portion 164 of the core metal 162 and the slinger 170, a distal end portion of the cylindrical portion 163 of the core metal 162, and the outer ring 140. And an outer seal portion 168 for sealing between the inner peripheral surface.
The outer seal portion 168 protrudes in a trapezoidal cross section from the outer peripheral surface of the distal end portion of the cylindrical portion 163 of the core metal 162, and the outer diameter of the outer seal portion 168 is the cylindrical portion of the core metal 162. The outer diameter dimension of 163 and the inner diameter dimension of the press-fit portion of the outer ring 140 are set appropriately larger.
JP 2001-65704 A

ところで、前記した従来のものにおいては、外輪１４０の内周面にシール部材１６１を組み付ける場合には、シール部材１６１がその芯金１６２の筒部１６３において、外輪１４０の一端開口部側から内周面の所定位置まで圧入されて組み付けられる。この際、図４に示すように、外側のシール部１６８が外輪１４０の内周面に押圧されて弾性的に圧縮されると共に、外側のシール部１６８の一部が外輪１４０の内周面の開口端側に向けて押し出される。
このため、外輪１４０に対する芯金１６２の筒部１６３の圧入位置（外輪１４０の端面から筒部１６３の先端までの距離寸法Ｌ）を測定する場合において、外輪１４０の内周面の開口端側に向けて押し出された外側のシール部１６８に押出部１６８ａが測定の妨害物となり、測定作業が厄介となると共に、押出部６８ａのバラツキ等によって正確に測定することができない場合がある。
また、外輪１４０の内周面に芯金１６２の筒部１６３が圧入される際に、芯金１６２の筒部１６３の先端外周面から外側のシール部１６８が剥がれる恐れもある。 By the way, in the above-described conventional one, when the seal member 161 is assembled to the inner peripheral surface of the outer ring 140, the seal member 161 is connected to the inner periphery from the one end opening side of the outer ring 140 in the cylindrical portion 163 of the core metal 162. It is press-fitted to a predetermined position on the surface and assembled. At this time, as shown in FIG. 4, the outer seal portion 168 is pressed against the inner peripheral surface of the outer ring 140 and is elastically compressed, and a part of the outer seal portion 168 is formed on the inner peripheral surface of the outer ring 140. Pushed toward the open end.
Therefore, when measuring the press-fitting position of the cylindrical portion 163 of the core metal 162 with respect to the outer ring 140 (distance dimension L from the end surface of the outer ring 140 to the tip of the cylindrical portion 163), the opening end side of the inner peripheral surface of the outer ring 140 is measured. The extruded portion 168a becomes an obstacle to the measurement on the outer seal portion 168 extruded toward the outer side, and the measurement work becomes troublesome, and the measurement may not be performed accurately due to variations in the extruded portion 68a.
Further, when the cylindrical portion 163 of the core metal 162 is press-fitted into the inner peripheral surface of the outer ring 140, the outer seal portion 168 may be peeled off from the outer peripheral surface of the tip end of the cylindrical portion 163 of the core metal 162.

この発明の目的は、前記問題点に鑑み、外輪に対する芯金の筒部の圧入位置を容易に測定することができる転がり軸受の密封装置を提供することである。   In view of the above problems, an object of the present invention is to provide a rolling bearing sealing device capable of easily measuring the press-fitting position of the cylindrical portion of the core metal with respect to the outer ring.

前記目的を達成するために、この発明の請求項１に係る転がり軸受の密封装置は、内輪と外輪との間の環状空間を密封するためのシール部材を備えた転がり軸受の密封装置であって、
前記シール部材は、前記外輪の内周面に圧入される筒部を有する芯金と、この芯金に被覆状に設けられた弾性体とを有し、
前記弾性体は、前記芯金の筒部と前記外輪との間をシールするシール部を有し、
前記シール部は、前記芯金の筒部の先端部外周面から半径方向の外側に向けて突出するリップ状に形成されると共に、前記外輪の開口近傍の内周面に弾性的に撓んで密接することを特徴とする。 In order to achieve the above object, a rolling bearing sealing device according to claim 1 of the present invention is a rolling bearing sealing device including a sealing member for sealing an annular space between an inner ring and an outer ring. ,
The seal member includes a cored bar having a cylindrical portion press-fitted into the inner peripheral surface of the outer ring, and an elastic body provided in a covering shape on the cored bar,
The elastic body has a seal portion that seals between the cylindrical portion of the core metal and the outer ring,
The seal portion is formed in a lip shape that protrudes radially outward from the outer peripheral surface of the tip portion of the cylindrical portion of the core metal, and is elastically bent and closely contacted with the inner peripheral surface in the vicinity of the opening of the outer ring. It is characterized by doing.

前記構成によると、外輪の内周面にシール部材を組み付ける場合には、シール部材がその芯金の筒部において、外輪の一端開口部側から内周面の所定位置まで圧入されて組み付けられる。この際、シール部は、外輪の開口近傍の内周面に弾性的に撓んで密接する。このため、従来と異なり、シール部の一部が外輪の内周面の開口端側に向けて押し出されることがない。ひいては、外輪に対する芯金の筒部の圧入位置を容易にかつ正確に測定することができる。   According to the above configuration, when the seal member is assembled to the inner peripheral surface of the outer ring, the seal member is press-fitted and assembled from the one end opening side of the outer ring to a predetermined position on the inner peripheral surface in the core portion of the core metal. At this time, the seal portion is elastically bent and brought into close contact with the inner peripheral surface near the opening of the outer ring. For this reason, unlike the conventional case, a part of the seal portion is not pushed toward the opening end side of the inner peripheral surface of the outer ring. As a result, it is possible to easily and accurately measure the press-fitting position of the cylindrical portion of the core metal with respect to the outer ring.

次に、この発明を実施するための最良の形態を実施例にしたがって説明する。   Next, the best mode for carrying out the present invention will be described with reference to examples.

（実施例１）
この発明の実施例１を図１〜図３にしたがって説明する。
図１はこの発明の実施例１に係る密封装置が採用された転がり軸受を備えた車輪用ハブユニットを示す側断面図である。図２は転がり軸受の内輪と外輪との間に密封装置が組み付けられた状態を拡大して示す断面図である、図３はシール部材を拡大して示す断面図である。
図１に示すように、まず、車輪用転がり軸受装置としての車輪用ハブユニットは、ハブホイール２０と、転がり軸受としての複列のアンギュラ玉軸受３１とを一体状に有してユニット化されている。
ハブホイール２０は、筒軸状をなすハブ軸２１と、ハブ軸２１の一端部寄り外周面に形成されたフランジ２２とを一体に有し、このフランジ２２には、ブレーキロータ（図示しない）を間に挟んで車輪（図示しない）を取り付けるための複数本のハブボルト２５が所定ピッチでかつ圧入によって固定されている。 (Example 1)
A first embodiment of the present invention will be described with reference to FIGS.
1 is a side sectional view showing a wheel hub unit including a rolling bearing in which a sealing device according to Embodiment 1 of the present invention is employed. FIG. 2 is an enlarged sectional view showing a state in which the sealing device is assembled between the inner ring and the outer ring of the rolling bearing, and FIG. 3 is an enlarged sectional view showing the seal member.
As shown in FIG. 1, first, a wheel hub unit as a wheel rolling bearing device is unitized by integrally forming a hub wheel 20 and a double row angular ball bearing 31 as a rolling bearing. Yes.
The hub wheel 20 integrally includes a hub shaft 21 having a cylindrical shaft shape and a flange 22 formed on the outer peripheral surface near one end of the hub shaft 21, and a brake rotor (not shown) is provided on the flange 22. A plurality of hub bolts 25 for attaching wheels (not shown) sandwiched therebetween are fixed at a predetermined pitch and press-fitted.

ハブ軸２１の外周には複列のアンギュラ玉軸受３１が組み付けられている。すなわち、ハブ軸２１の外周に沿って設けられた両軌道面３３、３４に対し所定の隙間をもって外輪４０が配置され、この外輪４０の内周面に形成された両軌道面４１、４２と、ハブ軸２１の両軌道面３３、３４との間に転動体としての複数個の玉５１、５２がそれぞれ組み込まれ、これら各複数個の玉５１、５２が保持器５５、５６によって保持されることでアンギュラ玉軸受３１が構成されている。
なお、図１に示すように、この実施例１においては、ハブ軸２１の外周面に設けられた両軌道面３３、３４のうち、ハブ軸２１のフランジ２２側に位置する軌道面３３は、ハブ軸２１の外周面が研削加工されることによって形成され、ハブ軸２１の先端側の軌道面３４は、ハブ軸２１の先端寄り外周面に嵌込まれ、かつかしめ部２７によって固定された内輪３２の外周面に形成されている。 Double row angular ball bearings 31 are assembled on the outer periphery of the hub shaft 21. That is, the outer race 40 is disposed with a predetermined gap with respect to both raceway surfaces 33 and 34 provided along the outer periphery of the hub shaft 21, and both raceway surfaces 41 and 42 formed on the inner circumference surface of the outer race 40, A plurality of balls 51, 52 as rolling elements are respectively incorporated between both raceway surfaces 33, 34 of the hub shaft 21, and each of the plurality of balls 51, 52 is held by cages 55, 56. An angular ball bearing 31 is configured.
As shown in FIG. 1, in the first embodiment, of the raceway surfaces 33 and 34 provided on the outer peripheral surface of the hub shaft 21, the raceway surface 33 located on the flange 22 side of the hub shaft 21 is An inner ring formed by grinding the outer peripheral surface of the hub shaft 21, and the raceway surface 34 on the front end side of the hub shaft 21 is fitted into the outer peripheral surface near the front end of the hub shaft 21 and fixed by the caulking portion 27. 32 is formed on the outer peripheral surface.

また、ハブホイール２０は、ハブ軸２１の内孔にシャフト（例えば、ドライブシャフト）がスプライン嵌合されて挿通された後、シャフト先端の雄ねじ部にナットが締め付けられることで、トルク伝達可能に連結されるようになっている。
また、外輪４０の外周面の軸方向中央部には、車体側部材、例えば、車両の懸架装置（図示しない）に支持されたナックル、又はキャリアの取付面にボルトによって固定するため固定フランジ４３が形成されている。 The hub wheel 20 is connected so that torque can be transmitted by inserting a shaft (for example, a drive shaft) into the inner hole of the hub shaft 21 by spline fitting and then tightening a nut to the male thread at the tip of the shaft. It has come to be.
In addition, a fixing flange 43 is provided at the axially central portion of the outer peripheral surface of the outer ring 40 for fixing to a vehicle body side member, for example, a knuckle supported by a vehicle suspension device (not shown) or a carrier mounting surface with bolts. Is formed.

図１と図２に示すように、内輪３２と外輪４０との間の環状空間８０に組み付けられて密封する密封装置６０は、内輪３２の外周面に組み付けられるスリンガ７０と、外輪４０の内周面に組み付けられるシール部材６１とを備えて構成されている。
スリンガ７０は、金属材によって形成され、内輪３２の外周面に圧入される筒部７１と、この筒部７１の一端から半径方向外側に向けて突出された突輪部７２とを有して断面Ｌ字状をなしている。 As shown in FIGS. 1 and 2, a sealing device 60 that is assembled and sealed in an annular space 80 between the inner ring 32 and the outer ring 40 includes a slinger 70 that is assembled on the outer circumferential surface of the inner ring 32, and an inner circumference of the outer ring 40. And a seal member 61 assembled to the surface.
The slinger 70 is formed of a metal material, and includes a cylindrical portion 71 that is press-fitted into the outer peripheral surface of the inner ring 32, and a projecting ring portion 72 that protrudes radially outward from one end of the cylindrical portion 71. It is L-shaped.

図２と図３に示すように、シール部材６１は、金属製の芯金６２と、軟質樹脂、ゴム等のエラストマよりなる弾性体６５とを有している。
また、芯金６２は、外輪４０の内周面に圧入される筒部６３と、この筒部６３の一端から半径方向中心側に向けて突出され、かつスリンガ７０の突輪部７２と所定間隔を隔てて対向する突輪部６４とを有している。 As shown in FIGS. 2 and 3, the seal member 61 includes a metal cored bar 62 and an elastic body 65 made of an elastomer such as soft resin or rubber.
The cored bar 62 is press-fitted into the inner peripheral surface of the outer ring 40, and protrudes from one end of the cylindrical part 63 toward the center in the radial direction, and is spaced from the protruding ring part 72 of the slinger 70 at a predetermined interval. And a protruding ring portion 64 facing each other.

弾性体６５は、芯金６２の筒部６３の内周面と突輪部６４の一側面（スリンガ７０の突輪部７２に対向する面）を被覆するようにして層状をなしている。
この実施例１において、弾性体６５は加硫ゴムによって形成され、芯金６２の筒部６３の内周面と突輪部６４の一側面に加硫接着（加硫接合）によって固着されている。
弾性体６５には、芯金６２の突輪部６４とスリンガ７０との間をシールする内側のシールリップ６６と、芯金６２の筒部６３の先端部と外輪４０の内周面との間をシールする外側のシール部（この発明のシール部に相当する）６８とを有している。
この実施例１において、内側のシールリップ６６は、芯金６２の突輪部６４の先端部からスリンガ７０の突輪部７２の先端部に向けてしだいに拡径されたテーパ状をなして突出する中間シールリップ６６ａと、芯金６２の突輪部６４の先端からスリンガ７０の筒部７１の外周面に向けて二股状をなして突出された奥シールリップ６６ｂによって構成されている。そして、図に示す組み付け状態において、中間シールリップ６６ａは、その先端部がスリンガ７０の突輪部７２の内面に弾性的に撓んで密接し、奥シールリップ６６ｂはスリンガ７０の筒部７１の外周面に弾性的に撓んで密接している。 The elastic body 65 is layered so as to cover the inner peripheral surface of the cylindrical portion 63 of the cored bar 62 and one side surface of the protruding ring portion 64 (the surface facing the protruding ring portion 72 of the slinger 70).
In the first embodiment, the elastic body 65 is made of vulcanized rubber, and is fixed to the inner peripheral surface of the cylindrical portion 63 of the core metal 62 and one side surface of the protruding ring portion 64 by vulcanization adhesion (vulcanization joining). .
The elastic body 65 includes an inner seal lip 66 that seals between the protruding ring portion 64 of the core metal 62 and the slinger 70, and a space between the tip of the cylindrical portion 63 of the core metal 62 and the inner peripheral surface of the outer ring 40. And an outer seal portion 68 (corresponding to the seal portion of the present invention).
In the first embodiment, the inner seal lip 66 protrudes in a tapered shape that gradually increases in diameter from the tip end portion of the projecting ring portion 64 of the core metal 62 toward the tip end portion of the projecting ring portion 72 of the slinger 70. The intermediate seal lip 66a and the back seal lip 66b projecting in a bifurcated manner from the tip of the projecting ring portion 64 of the core metal 62 toward the outer peripheral surface of the cylindrical portion 71 of the slinger 70. In the assembled state shown in the figure, the intermediate seal lip 66a is elastically bent and in close contact with the inner surface of the projecting ring portion 72 of the slinger 70, and the back seal lip 66b is the outer periphery of the cylindrical portion 71 of the slinger 70. It is elastically bent and in close contact with the surface.

図２と図３に示すように、外側のシール部６８は、芯金６２の筒部６３の先端部外周面から半径方向の外側に向けて直角状をなして突出するリップ状に形成されている。そして、図２に示す組み付け状態において、外側のシール部６８は、外輪４０の開口近傍の内周面（面取部４５ａ）に弾性的に撓んで密接している。   As shown in FIGS. 2 and 3, the outer seal portion 68 is formed in a lip shape that projects at a right angle from the outer peripheral surface of the distal end portion of the cylindrical portion 63 of the core metal 62 toward the outer side in the radial direction. Yes. In the assembled state shown in FIG. 2, the outer seal portion 68 is elastically bent and in close contact with the inner peripheral surface (the chamfered portion 45 a) near the opening of the outer ring 40.

この実施例１に係る車輪用ハブユニットの転がり軸受としてのアンギュラ玉軸受３１の密封装置６０は上述したように構成される。
したがって、内輪３２と外輪４０との間の環状空間８０に密封装置６０を組み付ける場合、まず、シール部材６１がその芯金６２の筒部６３において、外輪４０の一端開口部側から内周面の所定位置まで圧入されて組み付けられる。
次に、スリンガ７０がその筒部７１において、内輪３２の一端側から外周面の所定位置まで圧入されて組み付けられる。 The sealing device 60 of the angular ball bearing 31 as the rolling bearing of the wheel hub unit according to the first embodiment is configured as described above.
Therefore, when assembling the sealing device 60 in the annular space 80 between the inner ring 32 and the outer ring 40, first, the sealing member 61 is formed on the inner peripheral surface from the one end opening side of the outer ring 40 in the cylindrical portion 63 of the core metal 62. It is press-fitted to a predetermined position and assembled.
Next, the slinger 70 is press-fitted from the one end side of the inner ring 32 to a predetermined position on the outer peripheral surface at the cylindrical portion 71 and assembled.

外輪４０の一端開口部側から内周面の所定位置までシール部材６１の芯金６２の筒部６３が圧入されて組み付けられる際、外側のシール部６８は、外輪４０の開口近傍の内周面（面取部４５ａ）に弾性的に撓んで密接する。
このため、従来と異なり、外側のシール部６８の一部が外輪４０の内周面の開口端側に向けて押し出されることがない。
また、外輪４０に対する芯金６２の筒部６３の圧入位置（外輪４０の端面から筒部６３の先端までの距離寸法Ｌ）を測定する場合において、外輪４０の端面から芯金６２の筒部６３の先端を薄く被覆している弾性体６５の先端被覆部６５ａまでの距離Ｌ１を測定し、その距離Ｌ１に、先端被覆部６５ａの設定された厚さ寸法Ｔを加えることによって、外輪４０に対する芯金６２の筒部６３の圧入位置を容易にかつ正確に測定することができる。
このため、外輪４０の内周面に対する芯金６２の筒部６３の圧入過剰や圧入不足によるシール不良を良好に防止することができる。
また、圧入時において、外側のシール部６８が外輪４０の開口近傍の内周面（面取部４５ａ）に押圧されて弾性的に撓むため、外側のシール部６８に過大な力が作用して芯金６２の筒部６３から剥がれる不具合も抑制することができる。 When the cylindrical portion 63 of the cored bar 62 of the seal member 61 is press-fitted and assembled from one end opening side of the outer ring 40 to a predetermined position on the inner peripheral surface, the outer seal portion 68 is connected to the inner peripheral surface near the opening of the outer ring 40. It is elastically bent and in close contact with the (chamfer 45a).
For this reason, unlike the prior art, a part of the outer seal portion 68 is not pushed toward the opening end side of the inner peripheral surface of the outer ring 40.
Further, when the press-fitting position of the cylindrical portion 63 of the core metal 62 with respect to the outer ring 40 (distance L from the end surface of the outer ring 40 to the tip of the cylindrical portion 63) is measured, the cylindrical portion 63 of the core metal 62 from the end surface of the outer ring 40 is measured. The core L with respect to the outer ring 40 is measured by measuring the distance L1 to the tip covering portion 65a of the elastic body 65 that thinly coats the tip of the tip, and adding the set thickness dimension T of the tip covering portion 65a to the distance L1. The press-fitting position of the cylindrical portion 63 of the gold 62 can be easily and accurately measured.
For this reason, it is possible to satisfactorily prevent poor sealing due to excessive press-fitting or insufficient press-fitting of the cylindrical portion 63 of the core metal 62 with respect to the inner peripheral surface of the outer ring 40.
Further, at the time of press-fitting, the outer seal portion 68 is pressed against the inner peripheral surface (the chamfered portion 45a) in the vicinity of the opening of the outer ring 40 and elastically bends, so an excessive force acts on the outer seal portion 68. Thus, the problem of peeling off from the cylindrical portion 63 of the cored bar 62 can also be suppressed.

なお、この発明は前記実施例１に限定するものではない。
例えば、前記実施例１においては、転がり軸受として、複列のアンギュラ玉軸受３１が採用された場合を例示したが、複列の円すいころ軸受を用いてもこの発明を実施可能である。
また、車輪用ハブユニットの転がり軸受に密封装置６０が採用された場合を例示したが、各種の転がり軸受、例えば、単列、複列のアンギュラ玉軸受、円すいころ軸受、円筒こと軸受等に採用することができる。 The present invention is not limited to the first embodiment.
For example, in the first embodiment, the case where the double-row angular ball bearing 31 is employed as the rolling bearing has been illustrated, but the present invention can be implemented using a double-row tapered roller bearing.
In addition, the case where the sealing device 60 is adopted as the rolling bearing of the wheel hub unit is illustrated, but it is adopted in various rolling bearings such as single row and double row angular ball bearings, tapered roller bearings, cylindrical bearings, etc. can do.

この発明の実施例１に係る密封装置が採用された転がり軸受を備えた車輪用ハブユニットを示す側断面図である。It is a sectional side view which shows the hub unit for wheels provided with the rolling bearing by which the sealing device based on Example 1 of this invention was employ | adopted. 同じく転がり軸受の内輪と外輪との間に密封装置が組み付けられた状態を拡大して示す断面図である。It is sectional drawing which expands and shows the state by which the sealing device was similarly assembled | attached between the inner ring | wheel and outer ring | wheel of the rolling bearing. 同じくシール部材を拡大して示す断面図である。Similarly, it is sectional drawing which expands and shows a sealing member. 従来の転がり軸受の密封装置を示す断面図である。It is sectional drawing which shows the sealing device of the conventional rolling bearing. 同じくシール部材を拡大して示す断面図である。Similarly, it is sectional drawing which expands and shows a sealing member.

符号の説明Explanation of symbols

２０ ハブホイール
２１ ハブ軸
３１ アンギュラ玉軸受（転がり軸受）
３２ 内輪
４０ 外輪
６０ 密封装置
６１ シール部材
６２ 芯金
６３ 筒部
６５ 弾性体
６８ 外側のシール部（シール部）
７０ スリンガ
７１ 筒部
７２ 突輪部
20 Hub Wheel 21 Hub Shaft 31 Angular Contact Ball Bearing (Rolling Bearing)
32 Inner ring 40 Outer ring 60 Sealing device 61 Seal member 62 Core metal 63 Tube part 65 Elastic body 68 Outer seal part (seal part)
70 Slinger 71 Cylindrical part 72 Collision part

Claims (1)

内輪と外輪との間の環状空間を密封するためのシール部材を備えた転がり軸受の密封装置であって、
前記シール部材は、前記外輪の内周面に圧入される筒部を有する芯金と、この芯金に被覆状に設けられた弾性体とを有し、
前記弾性体は、前記芯金の筒部と前記外輪との間をシールするシール部を有し、
前記シール部は、前記芯金の筒部の先端部外周面から半径方向の外側に向けて突出するリップ状に形成されると共に、前記外輪の開口近傍の内周面に弾性的に撓んで密接することを特徴とする転がり軸受の密封装置。

A rolling bearing sealing device including a sealing member for sealing an annular space between an inner ring and an outer ring,
The seal member includes a cored bar having a cylindrical portion press-fitted into the inner peripheral surface of the outer ring, and an elastic body provided in a covering shape on the cored bar,
The elastic body has a seal portion that seals between the cylindrical portion of the core metal and the outer ring,
The seal portion is formed in a lip shape that protrudes radially outward from the outer peripheral surface of the tip portion of the cylindrical portion of the core metal, and is elastically bent and closely contacted with the inner peripheral surface in the vicinity of the opening of the outer ring. A rolling bearing sealing device characterized in that:

JP2006181538A 2006-06-30 2006-06-30 Sealing device of rolling bearing Pending JP2008008448A (en)

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Application Number Priority Date Filing Date Title
JP2006181538A JP2008008448A (en) 2006-06-30 2006-06-30 Sealing device of rolling bearing

Publications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009099059A1 (en) * 2008-02-05 2009-08-13 Ntn Corporation Fixation device of rubber seal for sealing ball-and-roller bearing
US20100189387A1 (en) * 2009-01-29 2010-07-29 Jtekt Corporation Rolling bearing
CN102777500A (en) * 2012-07-30 2012-11-14 湖北新火炬科技股份有限公司 Hub bearing unit with four-lip seal structure

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003056579A (en) * 2001-08-10 2003-02-26 Uchiyama Mfg Corp Sealing device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003056579A (en) * 2001-08-10 2003-02-26 Uchiyama Mfg Corp Sealing device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009099059A1 (en) * 2008-02-05 2009-08-13 Ntn Corporation Fixation device of rubber seal for sealing ball-and-roller bearing
JP2009185858A (en) * 2008-02-05 2009-08-20 Ntn Corp Device for fixing rolling bearing sealing rubber seal
US8517389B2 (en) 2008-02-05 2013-08-27 Ntn Corporation Fixing arrangement for a rubber seal for sealing a rolling bearing
US20100189387A1 (en) * 2009-01-29 2010-07-29 Jtekt Corporation Rolling bearing
US8246253B2 (en) * 2009-01-29 2012-08-21 Jtekt Corporation Rolling bearing
CN102777500A (en) * 2012-07-30 2012-11-14 湖北新火炬科技股份有限公司 Hub bearing unit with four-lip seal structure

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