JP6519165B2 - Sealing device for rolling bearing and sealing type rolling bearing - Google Patents

Sealing device for rolling bearing and sealing type rolling bearing Download PDF

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JP6519165B2
JP6519165B2 JP2014251165A JP2014251165A JP6519165B2 JP 6519165 B2 JP6519165 B2 JP 6519165B2 JP 2014251165 A JP2014251165 A JP 2014251165A JP 2014251165 A JP2014251165 A JP 2014251165A JP 6519165 B2 JP6519165 B2 JP 6519165B2
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slinger
axially extending
diameter
axial
rolling bearing
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JP2016090040A (en
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貴久 中田
貴久 中田
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NSK Ltd
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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
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings 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
    • 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
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7859—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element
    • F16C33/7863—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a further sealing element mounted to the inner race, e.g. a flinger to use centrifugal effect
    • 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
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

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

Description

本発明は、転がり軸受用密封装置、及び密封形転がり軸受に関し、特に、エンジン補機用プーリや産業機械用プーリなどに用いられる転がり軸受用密封装置、及び密封形転がり軸受に関する。   The present invention relates to a sealing device for a rolling bearing and a sealing type rolling bearing, and more particularly to a sealing device for a rolling bearing used for a pulley for an engine accessory or a pulley for an industrial machine, and a sealing type rolling bearing.

従来の転がり軸受では、リップ部を有するシール部材に加えて、密封性向上のため、スリンガを設けるものが多く知られている（例えば、特許文献１及び２参照）。また、特許文献１及び２に記載の転がり軸受では、軸受トルクへの影響を防ぐため、スリンガとシール部材とを非接触としたラビリンス構造を採用している。   Many conventional rolling bearings are known to be provided with a slinger in addition to a seal member having a lip portion in order to improve sealing performance (see, for example, Patent Documents 1 and 2). Moreover, in the rolling bearing of patent document 1 and 2, in order to prevent the influence on bearing torque, the labyrinth structure which made the slinger and the sealing member non-contact is employ | adopted.

特開２０１１−１５８０１７号公報JP, 2011-158017, A 特許第４７４７４１８号公報Patent No. 4747418 gazette

ところで、特許文献１及び２に記載の転がり軸受においては、スリンガを付加することで、シール部材の組立工程に加え、別途スリンガの組立工程が増加してしまうという課題が存在する。   By the way, in the rolling bearing of patent documents 1 and 2, in addition to the assembly process of a seal member, the subject that the assembly process of a slinger will increase separately exists by adding a slinger.

本発明は、前述した課題に鑑みてなされたものであり、その目的は、シール部材とスリンガの組立性を向上することができる転がり軸受用密封装置、及び密封形転がり軸受を提供することにある。   The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a sealing device for a rolling bearing capable of improving the assemblability of a sealing member and a slinger, and a sealing type rolling bearing. .

本発明の上記目的は、下記の構成により達成される。
（１） 環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、外輪の内周面に取り付けて使用されるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、内輪の外周面に前記円筒部を圧入固定して使用されるスリンガと、
を備え、前記シール部材と前記スリンガとが互いに軸方向に対向配置されて、着脱自在に一体となる転がり軸受用密封装置であって、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の内周面は、少なくとも前記フランジ部の前記外径側端部の軸方向幅よりも広い範囲において、前記フランジ部の外径よりも大径の逃げ部を構成し、
前記軸方向延出部は、その先端部の内周面に、前記フランジ部の外径よりも小径の円環状の凸部を有し、
前記軸方向延出部の凸部と前記フランジ部の外径側端部とが接触することで、前記軸方向延出部が径方向に弾性変形して前記フランジ部を径方向内方に押圧することにより、前記シール部材と前記スリンガとが着脱自在に一体となっており、
前記転がり軸受に組み付ける際には、前記シール部材と前記スリンガとの軸方向相対位置を変えることにより、前記軸方向延出部と前記フランジ部の外径側端部とが非接触となり、前記フランジ部の外径側端部と前記軸方向延出部の逃げ部との間にラビリンス隙間が形成され、前記軸方向延出部の凸部と前記フランジ部の外径側端部とが軸方向から見てオーバーラップすることを特徴とする転がり軸受用密封装置。
（２） 前記弾性部材は、前記スリンガ側へ軸方向に延出するに従って径方向外方に延びる他のシールリップ部をさらに備え、
前記他のシールリップ部は、前記転がり軸受に組み付ける際には、前記スリンガと接触し、前記シール部材と前記スリンガとが着脱自在に一体となっている際には、前記スリンガと非接触となることを特徴とする（１）に記載の転がり軸受用密封装置。
（３） 外輪と、
内輪と、
前記外輪と前記内輪との間に配置される複数の転動体と、
環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、前記外輪の内周面に取り付けられるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、前記内輪の外周面に前記円筒部が圧入固定されるスリンガと、
を備える密封形転がり軸受であって、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の内周面は、前記スリンガの前記フランジ部と軸方向同位置で、且つ、少なくとも前記フランジ部の外径側端部の軸方向幅よりも広い範囲において、前記フランジ部の外径よりも大径の逃げ部を構成し、前記フランジ部の外径側端部と前記軸方向延出部の前記逃げ部との間にラビリンス隙間が形成され、
前記軸方向延出部は、その先端部の内周面に、前記フランジ部の外径よりも小径の円環状の凸部を有し、前記軸方向延出部の凸部と前記フランジ部の外径側端部とが軸方向から見てオーバーラップし、前記スリンガが前記内輪に対して、前記シール部材が前記外輪に対して、それぞれ軸方向で突き当て固定されていることを特徴とする密封形転がり軸受。
（４） 前記弾性部材は、前記スリンガ側へ軸方向に延出するに従って径方向外方に延び、前記スリンガと接触する他のシールリップ部をさらに備えることを特徴とする（３）に記載の密封形転がり軸受。
（５） 環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、外輪の内周面に取り付けて使用されるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、内輪の外周面に前記円筒部を圧入固定して使用されるスリンガと、
を備え、前記シール部材と前記スリンガとが互いに軸方向に対向配置されて、着脱自在に一体となる転がり軸受用密封装置であって、
前記スリンガは、前記フランジ部の外径側端部から前記シール部材側へ軸方向に延びる折り曲げ部と、該折り曲げ部から径方向内側に突出する突出部と、をさらに備える単一の部材によって構成され、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の外周面は、少なくとも前記フランジ部の前記突出部の軸方向幅よりも広い範囲において、前記突出部の内径よりも小径の小径逃げ部を構成し、
前記軸方向延出部は、その先端部の外周面に、前記突出部の内径よりも大径の円環状の凸部を有し、
前記スリンガの前記折り曲げ部の内周面は、少なくとも前記凸部の軸方向幅よりも広い範囲において、前記凸部の外径よりも大径の大径逃げ部を構成し、
前記軸方向延出部の前記凸部と前記スリンガの前記突出部とが接触することで、前記凸部を含む前記軸方向延出部が径方向に弾性変形して前記突出部を径方向外方に押圧することにより、前記シール部材と前記スリンガとが着脱自在に一体となっており、
前記転がり軸受に組み付ける際には、前記シール部材と前記スリンガとの軸方向相対位置を変えることにより、前記軸方向延出部の前記凸部と前記スリンガの前記突出部とが非接触となり、前記スリンガの前記突出部と前記軸方向延出部の前記小径逃げ部との間、及び前記軸方向延出部の前記凸部と前記折り曲げ部の前記大径逃げ部との間に、ラビリンス隙間がそれぞれ形成され、前記軸方向延出部の凸部と前記スリンガの突出部とが軸方向から見てオーバーラップすることを特徴とする転がり軸受用密封装置。
（６） 外輪と、
内輪と、
前記外輪と前記内輪との間に配置される複数の転動体と、
環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、前記外輪の内周面に取り付けられるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、前記内輪の外周面に前記円筒部が圧入固定されるスリンガと、
を備える密封形転がり軸受であって、
前記スリンガは、前記フランジ部の外径側端部から前記シール部材側へ軸方向に延びる折り曲げ部と、該折り曲げ部から径方向内側に突出する突出部と、をさらに備える単一の部材によって構成され、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の外周面は、前記スリンガの前記突出部と軸方向同位置で、且つ、少なくとも前記フランジ部の前記突出部の軸方向幅よりも広い範囲において、前記突出部の内径よりも小径の小径逃げ部を構成し、前記スリンガの前記突出部と前記軸方向延出部の前記小径逃げ部との間にラビリンス隙間を形成し、
前記軸方向延出部は、その先端部の外周面に、前記突出部の内径よりも大径の円環状の凸部を有し、
前記スリンガの前記折り曲げ部の内周面は、前記軸方向延出部の前記凸部と軸方向同位置で、且つ、少なくとも前記凸部の軸方向幅よりも広い範囲において、前記凸部の外径よりも大径の大径逃げ部を構成し、前記軸方向延出部の前記凸部と前記折り曲げ部の前記大径逃げ部との間にラビリンス隙間を形成し、前記軸方向延出部の凸部と前記突出部とが軸方向から見てオーバーラップし、前記スリンガが前記内輪に対して、前記シール部材が前記外輪に対して、それぞれ軸方向で突き当て固定されていることを特徴とする密封形転がり軸受。 The above object of the present invention is achieved by the following constitution.
(1) A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side, which is used by being attached to the inner peripheral surface of the outer ring,
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring,
A sealing device for a rolling bearing in which the sealing member and the slinger are disposed to face each other in the axial direction, and are detachably integrated.
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The inner circumferential surface of the axially extending portion constitutes a relief portion having a diameter larger than the outer diameter of the flange portion, at least in a range wider than the axial width of the outer diameter side end portion of the flange portion.
The axially extending portion has, on an inner peripheral surface of a tip end portion thereof, an annular convex portion having a diameter smaller than the outer diameter of the flange portion,
Said axial By convex portion of the extending portion and the outer diameter side end portion of the flange portion is in contact, presses the flange portion and the axial extending portion is elastically deformed in the radial direction inward in the radial direction , The sealing member and the slinger are detachably integrated with each other,
Wherein when assembling the rolling bearing, by varying the relative axial position between the said sealing member slinger, and said axial extending portion and the flange portion of the outer diameter side end portion is Ri Do not in contact, A labyrinth gap is formed between the outer diameter side end of the flange and the relief of the axially extending portion, and the convex of the axially extending portion and the outer diameter end of the flange are A sealing device for a rolling bearing characterized by overlapping as viewed in the axial direction .
(2) The elastic member further includes another seal lip portion extending radially outward as it extends axially toward the slinger side,
The other seal lip portion is in contact with the slinger when assembled to the rolling bearing, and is not in contact with the slinger when the seal member and the slinger are detachably integrated. The sealing device for a rolling bearing according to (1), characterized in that
(3) Outer ring,
With the inner ring,
A plurality of rolling elements disposed between the outer ring and the inner ring;
A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side, the seal member being attached to the inner circumferential surface of the outer ring;
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring;
A sealed rolling bearing comprising:
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The inner peripheral surface of the axially extending portion is axially the same position as the flange portion of the slinger and at least wider than the axial width of the outer diameter side end portion of the flange portion. A relief portion having a diameter larger than the outer diameter of the second portion, and a labyrinth gap is formed between the outer diameter side end portion of the flange portion and the relief portion of the axially extending portion;
Said axial extension portion, the inner peripheral surface of the tip portion, have a convex portion of the small-diameter annular than the outer diameter of the flange portion, the convex portion of the axial extension portion of the flange portion The outer diameter side end portions overlap with each other when viewed in the axial direction, and the slinger is characterized in that the seal member is axially butted against and fixed to the inner ring and the outer ring. Sealed type rolling bearing.
(4) the elastic member extends radially outward in accordance with axially extending into said slinger side, according to (3), further comprising another sealing lip in contact with the slinger Sealed type rolling bearing.
(5) A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side, which is used by being attached to the inner circumferential surface of the outer ring,
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring,
A sealing device for a rolling bearing in which the sealing member and the slinger are disposed to face each other in the axial direction, and are detachably integrated.
The slinger includes: the flange portion of the outer diameter side end portion from the sealing member side extending bent portion in the axial direction to a projection projecting radially inwardly from said bent portion, by a single member Ru further comprising a Configured and
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The outer peripheral surface of the axially extending portion constitutes a small diameter relief portion having a diameter smaller than the inner diameter of the projecting portion, at least in a range wider than the axial width of the projecting portion of the flange portion.
The axially extending portion has an annular convex portion having a diameter larger than the inner diameter of the protruding portion on the outer peripheral surface of the tip end portion,
The inner circumferential surface of the bent portion of the slinger constitutes a large diameter relief portion larger in diameter than the outer diameter of the convex portion, at least in a range wider than the axial width of the convex portion;
When the convex portion of the axially extending portion contacts the protruding portion of the slinger, the axially extending portion including the convex portion is elastically deformed in the radial direction, and the protruding portion is radially outward And the sealing member and the slinger are detachably integrated with each other.
When assembling to the rolling bearing, by changing the axial relative position between the seal member and the slinger, the convex portion of the axially extending portion and the protrusion of the slinger do not come in contact with each other. A labyrinth gap is formed between the protrusion of the slinger and the small diameter relief portion of the axial extension, and between the convex portion of the axial extension and the large diameter relief of the bent portion. A sealing device for a rolling bearing , wherein each of the convex portion of the axially extending portion and the protruding portion of the slinger overlap when viewed from the axial direction .
(6) Outer ring,
With the inner ring,
A plurality of rolling elements disposed between the outer ring and the inner ring;
A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side, the seal member being attached to the inner circumferential surface of the outer ring;
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring;
A sealed rolling bearing comprising:
The slinger includes: the flange portion of the outer diameter side end portion from the sealing member side extending bent portion in the axial direction to a projection projecting radially inwardly from said bent portion, by a single member Ru further comprising a Configured and
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The outer peripheral surface of the axially extending portion is at the same axial position as the projecting portion of the slinger and at least in a range wider than the axial width of the projecting portion of the flange portion, than the inner diameter of the projecting portion A small diameter relief portion having a small diameter, and a labyrinth gap is formed between the protrusion of the slinger and the small diameter relief portion of the axially extending portion;
The axially extending portion has an annular convex portion having a diameter larger than the inner diameter of the protruding portion on the outer peripheral surface of the tip end portion,
The inner peripheral surface of the bent portion of the slinger is at the same axial position as the convex portion of the axially extending portion, and at least in a range wider than the axial width of the convex portion. A large diameter relief portion having a diameter larger than the diameter is formed, and a labyrinth clearance is formed between the convex portion of the axially extending portion and the large diameter relief portion of the bent portion, and the axially extending portion The projection and the projection overlap as viewed in the axial direction, and the slinger abuts against the inner ring and the seal member abuts against the outer ring in the axial direction, respectively. Sealed type rolling bearing.

本発明の転がり軸受用密封装置によれば、弾性部材は、スリンガ側へ軸方向に延出する軸方向延出部を備え、軸方向延出部とフランジ部の外径側端部とが接触することで、軸方向延出部が弾性変形してフランジ部を径方向内方に押圧することにより、シール部材とスリンガとが着脱自在に一体となっており、転がり軸受に組み付ける際には、シール部材とスリンガとの軸方向相対位置を変えることにより、軸方向延出部とフランジ部の外径側端部とが非接触となる。これにより、シール部材とスリンガとは、転がり軸受への組み立て前に一体的に取り扱うことができ、シール部材とスリンガの組立性を向上することができる。   According to the rolling bearing sealing device of the present invention, the elastic member includes the axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion and the outer diameter side end portion of the flange portion are in contact with each other. As a result, the axially extending portion is elastically deformed and the flange portion is pressed radially inward, whereby the seal member and the slinger are detachably integrated, and when assembled to the rolling bearing, By changing the axial relative position between the seal member and the slinger, the axially extending portion and the outer diameter side end portion of the flange portion do not come in contact with each other. Thereby, the seal member and the slinger can be handled integrally before assembly to the rolling bearing, and the assemblability of the seal member and the slinger can be improved.

また、本発明の密封形転がり軸受によれば、弾性部材は、スリンガ側へ軸方向に延出する軸方向延出部を備え、軸方向延出部の内周面は、スリンガのフランジ部と軸方向同位置で、且つ、少なくともフランジ部の外径側端部の軸方向幅よりも広い範囲において、フランジ部の外径よりも大径の逃げ部を構成し、フランジ部の外径側端部と軸方向延出部の逃げ部との間にラビリンス隙間が形成され、軸方向延出部は、その先端部の内周面に、フランジ部の外径よりも小径の円環状の凸部を有する。これにより、シール部材とスリンガとは、転がり軸受への組み立て前に一体的に取り扱うことができ、シール部材とスリンガの組立性を向上することができる。また、スリンガとシール部材との間のラビリンス構造を長くすることができ、軸受の密封性をさらに向上することができる。   Further, according to the sealed type rolling bearing of the present invention, the elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and an inner peripheral surface of the axially extending portion is a flange portion of the slinger A relief portion having a diameter larger than the outer diameter of the flange portion is formed at the same position in the axial direction and at least in a range wider than the axial width of the outer diameter side end portion of the flange portion. A labyrinth gap is formed between the end portion and the relief portion of the axially extending portion, and the axially extending portion has an annular convex portion smaller in diameter than the outer diameter of the flange portion on the inner peripheral surface of the tip end portion. Have. Thereby, the seal member and the slinger can be handled integrally before assembly to the rolling bearing, and the assemblability of the seal member and the slinger can be improved. In addition, the labyrinth structure between the slinger and the seal member can be lengthened, and the sealability of the bearing can be further improved.

また、本発明の他の転がり軸受用密封装置によれば、スリンガは、フランジ部の外径側端部からシール部材側へ軸方向に延びる折り曲げ部と、該折り曲げ部から径方向内側に突出する突出部と、をさらに備え、弾性部材は、スリンガ側へ軸方向に延出する軸方向延出部を備える。また、軸方向延出部の外周面は、少なくともフランジ部の突出部の軸方向幅よりも広い範囲において、突出部の内径よりも小径の小径逃げ部を構成し、軸方向延出部は、その先端部の外周面に、突出部の内径よりも大径の円環状の凸部を有し、スリンガの折り曲げ部の内周面は、少なくとも凸部の軸方向幅よりも広い範囲において、凸部の外径よりも大径の大径逃げ部を構成する。そして、軸方向延出部の凸部とスリンガの突出部とが接触することで、凸部を含む軸方向延出部が弾性変形して突出部を径方向外方に押圧することにより、シール部材とスリンガとが着脱自在に一体となっており、転がり軸受に組み付ける際には、シール部材とスリンガとの軸方向相対位置を変えることにより、軸方向延出部の凸部とスリンガの突出部とが非接触となり、スリンガの突出部と軸方向延出部の小径逃げ部との間、及び軸方向延出部の凸部と折り曲げ部の大径逃げ部との間に、ラビリンス隙間がそれぞれ形成される。これにより、シール部材とスリンガとを一体的に取り扱うことができ、シール部材の組立工程の過程で、スリンガを組み立てることができ、シール部材とスリンガの組立性を向上することができる。また、スリンガとシール部材との間のラビリンス構造を長くすることができ、軸受の密封性をさらに向上することができる。   Further, according to another rolling bearing sealing device of the present invention, the slinger protrudes radially inward from the bent portion extending in the axial direction from the outer diameter side end of the flange portion toward the seal member. The elastic member further includes an axially extending portion extending in the axial direction toward the slinger. Further, the outer peripheral surface of the axially extending portion constitutes a small diameter relief portion having a diameter smaller than the inner diameter of the projecting portion, at least in a range wider than the axial width of the projecting portion of the flange portion. The outer peripheral surface of the tip has an annular convex having a diameter larger than the inner diameter of the protrusion, and the inner peripheral surface of the bent portion of the slinger is convex at least in a range wider than the axial width of the convex A large diameter relief portion larger in diameter than the outer diameter of the portion is formed. Then, when the convex portion of the axially extending portion and the protruding portion of the slinger come into contact with each other, the axially extending portion including the convex portion is elastically deformed to press the protruding portion radially outward, thereby making the seal The member and the slinger are detachably integrated, and when assembled to the rolling bearing, by changing the relative axial position of the seal member and the slinger, the convex portion of the axially extending portion and the protruding portion of the slinger Are not in contact with each other, and the labyrinth clearances are respectively between the protrusion of the slinger and the small diameter relief portion of the axially extending portion, and between the convex portion of the axially extending portion and the large diameter relief portion of the bent portion. It is formed. Thus, the seal member and the slinger can be handled integrally, and in the process of assembling the seal member, the slinger can be assembled, and the assemblability of the seal member and the slinger can be improved. In addition, the labyrinth structure between the slinger and the seal member can be lengthened, and the sealability of the bearing can be further improved.

また、本発明の他の密封形転がり軸受によれば、スリンガは、フランジ部の外径側端部からシール部材側へ軸方向に延びる折り曲げ部と、該折り曲げ部から径方向内側に突出する突出部と、をさらに備え、弾性部材は、スリンガ側へ軸方向に延出する軸方向延出部を備える。また、軸方向延出部の外周面は、スリンガの突出部と軸方向同位置で、且つ、少なくともフランジ部の突出部の軸方向幅よりも広い範囲において、突出部の内径よりも小径の小径逃げ部を構成し、スリンガの突出部と軸方向延出部の小径逃げ部との間にラビリンス隙間を形成し、軸方向延出部は、その先端部の外周面に、突出部の内径よりも大径の円環状の凸部を有し、スリンガの折り曲げ部の内周面は、軸方向延出部の凸部と軸方向同位置で、且つ、少なくとも凸部の軸方向幅よりも広い範囲において、凸部の外径よりも大径の大径逃げ部を構成し、軸方向延出部の凸部と折り曲げ部の大径逃げ部との間にラビリンス隙間を形成する。これにより、シール部材とスリンガとは、転がり軸受への組み立て前に一体的に取り扱うことができ、シール部材とスリンガの組立性を向上することができる。また、スリンガとシール部材との間のラビリンス構造を長くすることができ、軸受の密封性をさらに向上することができる。   Further, according to another sealed type rolling bearing of the present invention, the slinger has a bent portion axially extending from the outer diameter end of the flange portion toward the seal member, and a protrusion projecting radially inward from the bent portion. The elastic member further includes an axially extending portion extending in the axial direction toward the slinger. Further, the outer peripheral surface of the axially extending portion is at the same axial position as the projecting portion of the slinger and at least in a range wider than the axial width of the projecting portion of the flange portion. A relief portion is formed, and a labyrinth gap is formed between the protrusion portion of the slinger and the small diameter relief portion of the axially extending portion, and the axially extending portion is formed on the outer peripheral surface of the tip portion by the inner diameter of the protrusion portion. Also, it has an annular convex portion with a large diameter, and the inner circumferential surface of the bent portion of the slinger is at the same axial position as the convex portion of the axially extending portion and at least wider than the axial width of the convex portion In the range, a large diameter relief portion having a diameter larger than the outer diameter of the convex portion is formed, and a labyrinth gap is formed between the convex portion of the axially extending portion and the large diameter relief portion of the bent portion. Thereby, the seal member and the slinger can be handled integrally before assembly to the rolling bearing, and the assemblability of the seal member and the slinger can be improved. In addition, the labyrinth structure between the slinger and the seal member can be lengthened, and the sealability of the bearing can be further improved.

（ａ）は、本発明の第１実施形態に係る密封形転がり軸受の半断面図であり、（ｂ）は、（ａ）のＩ部拡大図であり、（ｃ）は、シール部材とスリンガとが転がり軸受に固定される前、一体化された状態を示す断面図である。(A) is a half sectional view of the sealed rolling bearing according to the first embodiment of the present invention, (b) is an enlarged view of a portion I of (a), (c) is a seal member and a slinger And Fig. 12 is a cross-sectional view showing an integrated state before the bearing is fixed to the rolling bearing. （ａ）は、本発明の第１実施形態の変形例に係る密封形転がり軸受の半断面図であり、（ｂ）は、シール部材とスリンガとが転がり軸受に固定される前、一体化された状態を示す断面図である。(A) is a half section view of the sealed type rolling bearing concerning the modification of a 1st embodiment of the present invention, and (b) is unified before a seal member and a slinger are fixed to a rolling bearing. FIG. 6 is a cross-sectional view showing a broken state. （ａ）は、本発明の第２実施形態に係る密封形転がり軸受の半断面図であり、（ｂ）は、（ａ）のＩＩＩ部拡大図であり、（ｃ）は、シール部材とスリンガとが転がり軸受に固定される前、一体化された状態を示す断面図である。(A) is a half sectional view of the sealed rolling bearing according to a second embodiment of the present invention, (b) is an enlarged view of a portion III of (a), (c) is a seal member and a slinger And Fig. 12 is a cross-sectional view showing an integrated state before the bearing is fixed to the rolling bearing. （ａ）は、本発明の第３実施形態に係る密封形転がり軸受の半断面図であり、（ｂ）は、シール部材とスリンガとが転がり軸受に固定される前、一体化された状態を示す断面図である。(A) is a half section view of the sealed type rolling bearing concerning a 3rd embodiment of the present invention, and (b) shows the state where the seal member and the slinger were united before being fixed to the rolling bearing. It is a sectional view showing. （ａ）は、本発明の第３実施形態に係る密封形転がり軸受の半断面図であり、（ｂ）は、シール部材とスリンガとが転がり軸受に固定される前、一体化された状態を示す断面図である。(A) is a half section view of the sealed type rolling bearing concerning a 3rd embodiment of the present invention, and (b) shows the state where the seal member and the slinger were united before being fixed to the rolling bearing. It is a sectional view showing. （ａ）は、本発明の第５実施形態に係る密封形転がり軸受の半断面図であり、（ｂ）は、（ａ）のＶＩ部拡大図であり、（ｃ）は、シール部材とスリンガとが転がり軸受に固定される前、一体化された状態を示す断面図である。(A) is a half section view of the sealed type rolling bearing concerning a 5th embodiment of the present invention, (b) is an enlarged view of VI part of (a), (c) is a seal member and slinger And Fig. 12 is a cross-sectional view showing an integrated state before the bearing is fixed to the rolling bearing.

以下、本発明の各実施形態に係る密封型転がり軸受、及び転がり軸受用密封装置について、図面に基づいて詳細に説明する。   Hereinafter, a sealed type rolling bearing and a rolling bearing sealing device according to each embodiment of the present invention will be described in detail based on the drawings.

（第１実施形態）
図１に示すように、本実施形態の密封形転がり軸受１０は、内周面に外輪軌道面１１ａを有する外輪１１と、外周面に内輪軌道面１２ａを有する内輪１２と、外輪１１の外輪軌道面１１ａと内輪１２の内輪軌道面１２ａとの間に配置される複数の転動体としての玉１
３と、複数の玉１３を円周方向に所定の間隔で保持する保持器１４と、を備える。 First Embodiment
As shown in FIG. 1, in the sealed type rolling bearing 10 of this embodiment, an outer ring 11 having an outer ring raceway surface 11 a on an inner peripheral surface, an inner ring 12 having an inner ring raceway surface 12 a on an outer peripheral surface, and an outer ring raceway of the outer ring 11 Balls 1 as a plurality of rolling elements disposed between the surface 11 a and the inner ring raceway surface 12 a of the inner ring 12
3 and a holder 14 for holding the plurality of balls 13 at predetermined intervals in the circumferential direction.

また、密封形転がり軸受１０は、外輪１１の内周面に形成されたシール溝１１ｂに取り付けられるシール部材２０と、内輪１２の外周面に固定されるスリンガ３０と、をさらに備える。
なお、図１（ａ）は、密封形転がり軸受１０の半断面図を示しており、軸方向一方側のみのシール部材２０及びスリンガ３０を示しているが、シール部材２０及びスリンガ３０は、軸方向両側に配置されてもよい。また、シール部材２０とスリンガ３０とは、本発明の転がり軸受用密封装置４０を構成する。 Sealed rolling bearing 10 further includes seal member 20 attached to seal groove 11 b formed on the inner peripheral surface of outer ring 11 and a slinger 30 fixed to the outer peripheral surface of inner ring 12.
FIG. 1 (a) shows a half sectional view of the sealed rolling bearing 10, and shows the seal member 20 and the slinger 30 on only one side in the axial direction. However, the seal member 20 and the slinger 30 have shafts It may be disposed on both sides of the direction. In addition, the seal member 20 and the slinger 30 constitute the rolling bearing sealing device 40 of the present invention.

シール部材２０は、環状の芯金２１、及び、芯金２１の内端部よりも内径側に第１〜第３シールリップ部２３ａ〜２３ｃを備える弾性部材２２を有する。内輪１２の肩部１２ｂは、軸方向外側において段付き形状に形成されており、第１シールリップ部２３ａは、肩部１２ｂと近接対向する非接触リップを、第１シールリップ部２３ａよりも径方向内側の第２シールリップ部２３ｂは、肩部１２ｂの軸方向端面１２ｃと接触する接触リップを、第２シールリップ部２３ｂに対して軸方向外側の第３シールリップ部２３ｃは、スリンガ３０と対向する非接触リップをそれぞれ構成している。   The seal member 20 has an annular core metal 21 and an elastic member 22 provided with first to third seal lip portions 23 a to 23 c on the inner diameter side of the inner end portion of the core metal 21. The shoulder portion 12b of the inner ring 12 is formed in a stepped shape on the axially outer side, and the first seal lip portion 23a has a non-contact lip closely opposed to the shoulder portion 12b and has a diameter larger than that of the first seal lip portion 23a. The second seal lip portion 23b on the inner side is in contact with the axial end face 12c of the shoulder 12b, and the third seal lip portion 23c on the axially outer side with respect to the second seal lip portion 23b is a slinger 30 The opposing noncontact lips are respectively configured.

また、スリンガ３０は、内輪１２の外周面に段付き形状により形成された小径外周面１２ｄに圧入固定される円筒部３１と、円筒部３１の軸方向端部から径方向外側に延びる環状のフランジ部３２と、を有する。スリンガ３０のフランジ部３２は、シール部材２０の芯金２１よりも軸方向外側に配置されており、シール部材２０とスリンガ３０とは、互いに軸方向に対向配置されている。   Further, the slinger 30 has a cylindrical portion 31 press-fitted and fixed to the small diameter outer peripheral surface 12 d formed in a stepped shape on the outer peripheral surface of the inner ring 12, and an annular flange extending radially outward from the axial end of the cylindrical portion 31 And a unit 32. The flange portion 32 of the slinger 30 is disposed axially outside the core metal 21 of the seal member 20, and the seal member 20 and the slinger 30 are disposed to face each other in the axial direction.

また、図１（ｂ）にも示すように、シール部材２０の弾性部材２２は、スリンガ３０のフランジ部３２の外径側端部３２ａより径方向外側で、芯金２１の軸方向外側面に固着された軸方向外側部分から軸方向外側（スリンガ側）に延出する軸方向延出部２４を有する。さらに、フランジ部３２より軸方向外側に位置する軸方向延出部２４の先端部の内周面には、径方向内側に僅かに突出する円環状の凸部２５が形成される。この凸部２５は、フランジ部３２の外径ｄ１よりも小径の内径Ｄａで、フランジ部３２の外径側端部３２ａと軸方向から見てオーバーラップしている。   Further, as shown in FIG. 1 (b), the elastic member 22 of the seal member 20 is provided on the axially outer surface of the cored bar 21 radially outside the outer diameter side end 32 a of the flange portion 32 of the slinger 30. An axially extending portion 24 extends from the fixed axially outer portion to the axially outer side (slinger side). Further, on the inner peripheral surface of the tip end portion of the axially extending portion 24 located axially outward of the flange portion 32, an annular convex portion 25 slightly projecting radially inward is formed. The convex portion 25 has an inner diameter Da smaller than the outer diameter d1 of the flange portion 32, and overlaps the outer diameter side end portion 32a of the flange portion 32 as viewed in the axial direction.

また、軸方向延出部２４の内周面は、少なくともフランジ部３２の外径側端部３２ａの軸方向幅ｗ１よりも広い範囲Ｗａにおいて、フランジ部３２の外径ｄ１よりも大径の内径Ｄｂを有する逃げ部２６を構成する。   The inner circumferential surface of the axially extending portion 24 has an inner diameter larger than the outer diameter d1 of the flange portion 32 at least in a range Wa wider than the axial width w1 of the outer diameter side end portion 32a of the flange portion 32. The relief 26 having Db is configured.

図１（ｃ）に示すように、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定される前の状態では、軸方向延出部２４の凸部２５は、フランジ部３２の外径側端部３２ａと半径方向において軽く接触し、凸部２５を含む軸方向延出部２４が半径方向に弾性変形してフランジ部３２を径方向内方に押圧することにより、シール部材２０とスリンガ３０とが着脱可能に一体的に取り扱われる。   As shown in FIG. 1C, in the state before the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12, respectively, the convex portion 25 of the axially extending portion 24 is outside the flange portion 32. The sealing member 20 is brought into contact with the radial end 32a in the radial direction, and the axial extension 24 including the projection 25 elastically deforms in the radial direction to press the flange 32 radially inward. The slinger 30 is handled integrally in a removable manner.

一方、図１（ａ）に示すように、シール部材２０とスリンガ３０とを外輪１１及び内輪１２にそれぞれ組み付ける際には、シール部材２０とスリンガ３０との軸方向相対位置を変えることにより、軸方向延出部の凸部２５とフランジ部３２の外径側端部３２ａとが非接触となる。これにより、軸方向延出部２４の逃げ部２６は、スリンガ３０のフランジ部３２と軸方向同位置となり、フランジ部３２の外径側端部３２ａと軸方向延出部２４の逃げ部２６との間には、ラビリンス隙間が形成される。したがって、シール部材２０とスリンガ３０とは、外輪１１及び内輪１２にそれぞれ装着された状態で、スリンガ３０のフランジ部３２とシール部材２０との間のラビリンス構造を長くすることができ、密封性をさらに向上することができる。   On the other hand, as shown in FIG. 1 (a), when assembling the seal member 20 and the slinger 30 to the outer ring 11 and the inner ring 12, respectively, the axial relative position of the seal member 20 and the slinger 30 is changed. The convex portion 25 of the direction extending portion and the outer diameter side end portion 32 a of the flange portion 32 do not come in contact with each other. Thereby, the relief portion 26 of the axially extending portion 24 is in the same axial position as the flange portion 32 of the slinger 30, and the outer diameter side end portion 32 a of the flange portion 32 and the relief portion 26 of the axially extending portion 24 A labyrinth gap is formed between the Therefore, the seal member 20 and the slinger 30 can lengthen the labyrinth structure between the flange portion 32 of the slinger 30 and the seal member 20 in a state of being attached to the outer ring 11 and the inner ring 12, respectively, It can be further improved.

また、図１（ｃ）に示すように一体化されたシール部材２０とスリンガ３０とを転がり軸受１０に組み立てる際には、シール部材２０の押し込み量がスリンガ３０の押し込み量よりも大きくなるように各押し込み量を調節することで、凸部２５でのシール部材２０とスリンガ３０との係止が解除され、シール部材２０とスリンガ３０とを外輪１１及び内輪１２に固定する。したがって、シール部材２０とスリンガ３０との押し込み量を一度で管理することができる。   Further, when assembling the seal member 20 integrated with the slinger 30 into the rolling bearing 10 as shown in FIG. 1C, the amount of depression of the seal member 20 is larger than the amount of depression of the slinger 30. By adjusting each pressing amount, the locking between the seal member 20 and the slinger 30 at the convex portion 25 is released, and the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12. Therefore, the pressing amount of the seal member 20 and the slinger 30 can be managed at one time.

なお、シール部材２０とスリンガ３０との押し込み量を調節することにより、軸方向延出部２４と、フランジ部３２の外径側端部３２ａとのクリアランスを小さくし、所望のラビリンス構造を得ることができる。   The clearance between the axially extending portion 24 and the outer diameter side end portion 32 a of the flange portion 32 is reduced by adjusting the amount of pressing of the seal member 20 and the slinger 30 to obtain a desired labyrinth structure. Can.

以上説明したように、本実施形態の転がり軸受用密封装置４０によれば、弾性部材２２は、軸方向外側に延出する軸方向延出部２４を備え、軸方向延出部２４とフランジ部３２の外径側端部３２ａとが接触することで、軸方向延出部２４が弾性変形してフランジ部３２を径方向内方に押圧することにより、シール部材２０とスリンガ３０とが着脱自在に一体となる。また、転がり軸受１０に組み付ける際には、シール部材２０とスリンガ３０との軸方向相対位置を変えることにより、軸方向延出部２４とフランジ部３２の外径側端部３２ａとが非接触となる。これにより、シール部材２０とスリンガ３０とを一体的に取り扱うことができ、シール部材２０の組立工程の過程で、スリンガ３０を組み立てることができ、シール部材２０とスリンガ３０の組立性を向上することができる。   As described above, according to the rolling bearing sealing device 40 of the present embodiment, the elastic member 22 includes the axially extending portion 24 extending outward in the axial direction, and the axially extending portion 24 and the flange portion The contact with the outer diameter side end 32a of 32 causes the axial extension 24 to be elastically deformed to press the flange 32 inward in the radial direction, whereby the seal member 20 and the slinger 30 are detachable. Together. Also, when assembling the rolling bearing 10, the axial extension 24 and the outer diameter end 32a of the flange 32 are not in contact by changing the axial relative position between the sealing member 20 and the slinger 30. Become. Thereby, the seal member 20 and the slinger 30 can be handled integrally, and in the process of assembling the seal member 20, the slinger 30 can be assembled, and the assemblability of the seal member 20 and the slinger 30 is improved. Can.

また、軸方向延出部２４の内周面は、少なくともフランジ部３２の外径側端部３２ａの軸方向幅よりも広い範囲において、フランジ部３２の外径ｄ１よりも大径の逃げ部２６を構成し、軸方向延出部２４は、その先端部の内周面に、フランジ部３２の外径よりも小径の円環状の凸部２５を有する。そして、軸方向延出部２４の凸部２５とフランジ部３２の外径側端部とが接触することで、凸部２５を含む軸方向延出部２４が弾性変形してフランジ部３２を径方向内方に押圧することにより、シール部材２０とスリンガ３０とが着脱自在に一体となる。また、転がり軸受に組み付ける際には、シール部材２０とスリンガ３０との軸方向相対位置を変えることにより、軸方向延出部２４の凸部２５とフランジ部３２の外径側端部とが非接触となり、フランジ部３２の外径側端部と軸方向延出部２４の逃げ部２６との間にラビリンス隙間が形成される。これにより、スリンガ３０の組立性向上に加えて、スリンガ３０のフランジ部３２とシール部材２０との間のラビリンス構造を長くすることができ、軸受の密封性をさらに向上することができる。   Further, the relief portion 26 having a diameter larger than the outer diameter d1 of the flange portion 32 at least in the range wider than the axial width of the outer diameter side end portion 32a of the flange portion 32. The axially extending portion 24 has an annular convex portion 25 smaller in diameter than the outer diameter of the flange portion 32 on the inner peripheral surface of the tip end portion. Then, when the convex portion 25 of the axially extending portion 24 and the outer diameter side end portion of the flange portion 32 come in contact with each other, the axially extending portion 24 including the convex portion 25 is elastically deformed to make the flange portion 32 a diameter. By pressing inward in the direction, the seal member 20 and the slinger 30 are detachably integrated. Further, when assembling to the rolling bearing, the axial relative position of the seal member 20 and the slinger 30 is changed so that the convex portion 25 of the axially extending portion 24 and the outer diameter side end portion of the flange portion 32 are not A labyrinth gap is formed between the outer diameter side end of the flange portion 32 and the relief portion 26 of the axially extending portion 24. As a result, in addition to the improvement of the assemblability of the slinger 30, the labyrinth structure between the flange portion 32 of the slinger 30 and the seal member 20 can be lengthened, and the sealability of the bearing can be further improved.

また、本実施形態の密封形転がり軸受１０によれば、弾性部材２２は、スリンガ側へ軸方向に延出する軸方向延出部２４を備え、軸方向延出部２４の内周面は、スリンガ３０のフランジ部３２と軸方向同位置で、且つ、少なくともフランジ部２３の外径側端部３２ａの軸方向幅よりも広い範囲において、フランジ部３２の外径ｄ１よりも大径の逃げ部２６を構成し、フランジ部３２の外径側端部３２ａと軸方向延出部２４の逃げ部２６との間にラビリンス隙間が形成され、軸方向延出部２４は、その先端部の内周面に、フランジ部４３の外径ｄ１よりも小径の円環状の凸部２５を有する。これにより、シール部材２０とスリンガ３０とは、転がり軸受１０への組み立て前に一体的に取り扱うことができ、シール部材２０とスリンガ３０の組立性を向上することができる。また、スリンガ３０とシール部材２０との間のラビリンス構造を長くすることができ、軸受の密封性をさらに向上することができる。   Further, according to the sealed rolling bearing 10 of the present embodiment, the elastic member 22 includes the axially extending portion 24 axially extending toward the slinger side, and the inner circumferential surface of the axially extending portion 24 is: A relief portion having a diameter larger than the outer diameter d1 of the flange portion 32 at the same axial position as the flange portion 32 of the slinger 30 and at least wider than the axial width of the outer diameter side end portion 32a of the flange portion 23 26, and a labyrinth clearance is formed between the outer diameter end 32a of the flange 32 and the relief 26 of the axially extending portion 24, and the axially extending portion 24 has an inner periphery at its tip end. An annular convex portion 25 having a diameter smaller than the outer diameter d1 of the flange portion 43 is provided on the surface. Thereby, the seal member 20 and the slinger 30 can be handled integrally before assembling to the rolling bearing 10, and the assemblability of the seal member 20 and the slinger 30 can be improved. Also, the labyrinth structure between the slinger 30 and the seal member 20 can be made longer, and the sealing performance of the bearing can be further improved.

なお、上記実施形態では、シール部材２０とスリンガ３０とは、外輪１１及び内輪１２にそれぞれ固定される前、凸部２５がフランジ部３２の外径側端部３２ａと半径方向において弾性変形して接触することで、シール部材２０とスリンガ３０とが互いに係止されて一体的に取り扱われている。
しかしながら、図２に示す変形例のように、シール部材２０とスリンガ３０とは、外輪１１及び内輪１２にそれぞれ固定される前、スリンガ３０がシール部材２０の凸部２５の軸方向内側に収容されるようにして、非係止状態で一体的に取り扱われてもよい。したがって、シール部材２０とスリンガ３０とは、軸方向に互いに離間するように相対移動した際、凸部２５がフランジ部３２の外径側端部３２ａと軸方向で接触して、非分離とされる。
また、この変形例では、凸部２５とフランジ部３２の外径側端部３２ａとの係止状態を解除する作業が不要となり、より容易にスリンガ３０の組み立てを行うことができる。 In the above embodiment, before the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12, respectively, the convex portion 25 elastically deforms in the radial direction with the outer diameter side end portion 32a of the flange portion 32. By the contact, the seal member 20 and the slinger 30 are mutually locked and handled integrally.
However, as in the modified example shown in FIG. 2, before the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12 respectively, the slinger 30 is accommodated axially inside the convex portion 25 of the seal member 20. In a non-locking manner. Therefore, when the seal member 20 and the slinger 30 move relative to each other in the axial direction so as to be separated from each other, the convex portion 25 contacts the outer diameter side end portion 32 a of the flange portion 32 in the axial direction and is not separated. Ru.
Moreover, in this modification, the work of releasing the engagement between the convex portion 25 and the outer diameter side end 32a of the flange portion 32 is unnecessary, and the slinger 30 can be assembled more easily.

（第２実施形態）
図３は、第２実施形態の密封形転がり軸受１０を示している。この実施形態では、スリンガ３０のフランジ部３２の長さを短くし、スリンガ３０をコンパクト化した点において、第１実施形態と異なる。 Second Embodiment
FIG. 3 shows a sealed rolling bearing 10 according to a second embodiment. The present embodiment differs from the first embodiment in that the length of the flange portion 32 of the slinger 30 is shortened to make the slinger 30 compact.

この場合、シール部材２０の軸方向延出部２４は、シール部材２０の内径側に形成され、凸部２５がフランジ部３２の外径側端部３２ａと接触するように、フランジ部３２の外径ｄ１よりも小径の内径Ｄａを有し、フランジ部３２の外径側端部３２ａと軸方向から見てオーバーラップしている。   In this case, the axially extending portion 24 of the seal member 20 is formed on the inner diameter side of the seal member 20 so that the convex portion 25 contacts the outer diameter side end portion 32 a of the flange portion 32. It has an inner diameter Da smaller than the diameter d1, and overlaps with the outer diameter side end 32a of the flange portion 32 as viewed in the axial direction.

したがって、この実施形態においても、図３（ｃ）に示すように、凸部２５は、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定される前の状態で、スリンガ３０のフランジ部３２の外径側端部３２ａと半径方向において弾性変形して接触し、シール部材２０とスリンガ３０とを一体的に取り扱うことができる。   Therefore, also in this embodiment, as shown in FIG. 3C, the convex portion 25 is a flange of the slinger 30 before the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12 respectively. The seal member 20 and the slinger 30 can be handled integrally by elastically deforming and coming into contact with the radially outer end 32 a of the portion 32 in the radial direction.

一方、シール部材２０とスリンガ３０との軸方向相対位置を変えることで、図３（ａ）に示すように、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定されている状態となる。この状態では、軸方向延出部２４の逃げ部２６は、スリンガ３０のフランジ部３２と軸方向同位置となり、フランジ部３２の外径側端部３２ａと軸方向延出部２４の逃げ部２６との間には、ラビリンス隙間が形成される。これにより、シール部材２０とスリンガ３０の組立性向上に加えて、スリンガ３０のフランジ部３２とシール部材２０との間のラビリンス構造を長くすることができ、軸受の密封性をさらに向上することができる。
その他の構成及び作用については、第１実施形態のものと同様である。 On the other hand, by changing the axial relative position of the seal member 20 and the slinger 30, as shown in FIG. 3A, the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12, respectively. Become. In this state, the relief portion 26 of the axially extending portion 24 is in the same axial position as the flange portion 32 of the slinger 30, and the outer diameter side end portion 32a of the flange portion 32 and the relief portion 26 of the axially extending portion 24. And a labyrinth gap is formed between them. As a result, in addition to the improvement of the assemblability of the seal member 20 and the slinger 30, the labyrinth structure between the flange portion 32 of the slinger 30 and the seal member 20 can be lengthened, and the sealability of the bearing is further improved. it can.
The other configurations and actions are similar to those of the first embodiment.

（第３実施形態）
図４は、第３実施形態の密封形転がり軸受１０を示している。この実施形態では、軸方向延出部２４の凸部２５は、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定される前の状態では、第１実施形態と同様、スリンガ３０のフランジ部３２の外径側端部２３ａと半径方向において弾性変形しながら接触する。 Third Embodiment
FIG. 4 shows the sealed rolling bearing 10 of the third embodiment. In this embodiment, in the state before the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12 respectively, the convex portion 25 of the axially extending portion 24 is similar to that of the first embodiment. It contacts with the outer diameter side end 23a of the flange portion 32 while being elastically deformed in the radial direction.

一方、本実施形態のシール部材２０は、弾性部材２２の軸方向延出部２４が短く形成されており、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ組み立てられる際には、第１実施形態とは反対に、スリンガ３０は、シール部材２０から軸方向に離れるようにして、内輪１２に固定される。したがって、シール部材２０の押し込み量がスリンガ３０の押し込み量よりも大きくなるように各押し込み量を調節することで、凸部２５でのシール部材２０とスリンガ３０との係止が解除され、シール部材２０とスリンガ３０とを外輪１１及び内輪１２に固定する。   On the other hand, in the seal member 20 of the present embodiment, the axially extending portion 24 of the elastic member 22 is formed short, and when the seal member 20 and the slinger 30 are assembled to the outer ring 11 and the inner ring 12, respectively, Contrary to one embodiment, the slinger 30 is fixed to the inner ring 12 so as to be axially separated from the seal member 20. Therefore, by adjusting each pressing amount so that the pressing amount of the seal member 20 becomes larger than the pressing amount of the slinger 30, the locking between the seal member 20 and the slinger 30 at the convex portion 25 is released, and the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12.

なお、図４（ａ）に示すように、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定されている状態では、シール部材２０の凸部２５とフランジ部３２の外径側端部３２ａとは、ラビリンス構造を構成している。
その他の構成及び作用については、第１実施形態のものと同様である。
なお、本実施形態のシール部材２０においては、軸方向延出部２４の先端部に凸部２５を有しない構成であってもよい。 In the state where the seal member 20 and the slinger 30 are respectively fixed to the outer ring 11 and the inner ring 12 as shown in FIG. 4 (a), the outer diameter side end of the convex portion 25 and the flange portion 32 of the seal member 20. The portion 32a constitutes a labyrinth structure.
The other configurations and actions are similar to those of the first embodiment.
In the sealing member 20 according to the present embodiment, the protrusion 25 may not be provided at the tip of the axially extending portion 24.

（第４実施形態）
図５は、第４実施形態の密封形転がり軸受１０を示している。この実施形態では、シール部材２０の弾性部材２２は、半径方向において内径側の第１〜第３シールリップ部２３ａ〜２３ｃと軸方向延出部２４との間で、軸方向外側（スリンガ側）に延びる、円環状の他のシールリップ部３７をさらに備える。他のシールリップ部３７は、スリンガ側へ延出するに従って径方向外方に延び、本実施形態では、軸方向に対して４５°以上傾斜している。 Fourth Embodiment
FIG. 5 shows a sealed rolling bearing 10 according to a fourth embodiment. In this embodiment, the elastic member 22 of the seal member 20 is axially outside (slinger side) between the radially extending first to third seal lip portions 23a to 23c and the axially extending portion 24. And further includes an annular other seal lip 37. The other seal lip portion 37 extends radially outward as it extends to the slinger side, and in the present embodiment, is inclined at 45 ° or more with respect to the axial direction.

そして、図５（ｂ）に示すように、他のシールリップ部３７は、輸送時など、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定される前の状態で、シール部材２０とスリンガ３０とが着脱自在に一体となっている際には、スリンガ３０のフランジ部３２と非接触となる。このため、輸送時にスリンガ３０への張り付きなどによる、他のシールリップ部３７の破損は起こらない。   Then, as shown in FIG. 5B, the other seal lip portion 37 is in a state before the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12 at the time of transportation, etc. When the slinger 30 and the slinger 30 are detachably integrated, they do not contact the flange portion 32 of the slinger 30. For this reason, breakage of the other seal lip portion 37 due to sticking to the slinger 30 or the like does not occur during transportation.

また、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定されている状態では、他のシールリップ部３７は、スリンガ３０のフランジ部３２と接触する。この場合、他のシールリップ部３７は、径方向外方に傾斜しているので、組み付け時にも他のシールリップ部３７がめくれたり、巻き込まれたりして、破損することがない。   Further, in a state where the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12 respectively, the other seal lip portion 37 contacts the flange portion 32 of the slinger 30. In this case, since the other seal lip portion 37 is inclined radially outward, the other seal lip portion 37 is not torn up or rolled up and damaged even at the time of assembly.

したがって、本実施形態よれば、弾性部材２２が、スリンガ側へ軸方向に延出するに従って径方向外方に延びる他のシールリップ部３７をさらに備え、他のシールリップ部３７は、転がり軸受１０に組み付ける際には、スリンガ３０と接触し、シール部材２０とスリンガ３０とが一体となっている際には、スリンガ３０と非接触となるので、他のシールリップ部３７の破損を防止しつつ、さらに密封性能を向上することができる。
その他の構成及び作用については、第１実施形態のものと同様である。 Therefore, according to the present embodiment, the elastic member 22 further includes another seal lip portion 37 extending radially outward as it extends axially in the slinger side, and the other seal lip portion 37 is the rolling bearing 10. When assembled to the housing, it comes in contact with the slinger 30, and when the seal member 20 and the slinger 30 are integrated, it becomes non-contact with the slinger 30, thus preventing the other seal lip portion 37 from being damaged. The sealing performance can be further improved.
The other configurations and actions are similar to those of the first embodiment.

（第５実施形態）
図６は、第５実施形態の密封形転がり軸受１０を示している。この実施形態では、スリンガ３０は、フランジ部３２の外径側端部３２ａから軸方向内側（シール部材側）に延びる折り曲げ部３３と、該折り曲げ部３３から径方向内側に突出する突出部３４と、をさらに備える。また、弾性部材２２は、軸方向外側（スリンガ側）へ延出する軸方向延出部２４を備え、軸方向延出部２４は、その先端部の外周面に、突出部３４の内径ｄ２よりも大径の外径Ｄｄを有する円環状の凸部２５ａを有する。 Fifth Embodiment
FIG. 6 shows the sealed rolling bearing 10 of the fifth embodiment. In this embodiment, the slinger 30 includes a bent portion 33 extending inward in the axial direction (seal member side) from the outer diameter side end 32 a of the flange portion 32, and a protruding portion 34 protruding radially inward from the bent portion 33. And further comprising Further, the elastic member 22 is provided with an axially extending portion 24 extending outward in the axial direction (slinger side), and the axially extending portion 24 has an outer peripheral surface at a tip end portion thereof from the inner diameter d2 It has an annular convex portion 25a having a large diameter outer diameter Dd.

図６（ｂ）に示すように、軸方向延出部２４の外周面は、少なくともフランジ部３２の突出部３４の軸方向幅ｗ２よりも広い範囲Ｗｂにおいて、突出部３４の内径ｄ２よりも小径の外径Ｄｃを有する小径逃げ部２６ａを構成する。また、スリンガ３０の折り曲げ部３３の内周面は、少なくとも凸部２５ａの軸方向幅Ｗｃよりも広い範囲ｗ３において、凸部２５ａの外径Ｄｄよりも大径の内径ｄ３を有する大径逃げ部３５を構成する。   As shown in FIG. 6B, the outer peripheral surface of the axially extending portion 24 has a diameter smaller than the inner diameter d2 of the projecting portion 34 at least in a range Wb wider than the axial width w2 of the projecting portion 34 of the flange portion 32. The small diameter relief portion 26a having an outer diameter Dc of The inner circumferential surface of the bent portion 33 of the slinger 30 is a large diameter relief portion having an inner diameter d3 larger than the outer diameter Dd of the convex portion 25a in at least the range w3 wider than the axial width Wc of the convex portion 25a. Configure 35

これにより、凸部２５ａは、図６（ｃ）に示すように、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定される前の状態で、軸方向延出部２４の凸部２５ａとスリンガ３０の突出部３４とが接触することで、凸部２５ａを含む軸方向延出部２４が弾性変形して突出部３４を径方向外方に押圧することにより、シール部材２０とスリンガ３０とが着脱自在に一体となる。   Thereby, as shown in FIG. 6C, the convex portion 25a is a convex portion of the axially extending portion 24 before the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12, respectively. The contact between the projections 25a and the protrusions 34 of the slinger 30 causes the axially extending portions 24 including the protrusions 25a to be elastically deformed to press the protrusions 34 radially outward, whereby the seal member 20 and the slinger are removed. 30 and 30 are detachably integrated.

また、図６（ａ）及び（ｂ）に示すように、シール部材２０とスリンガ３０とが外輪１１及び内輪１２にそれぞれ固定されている状態で、シール部材２０とスリンガ３０との軸方向相対位置を変えることにより、軸方向延出部２４の凸部２５ａとスリンガ３０の突出部とが非接触となり、スリンガ３０の突出部３４と軸方向延出部２４の小径逃げ部２６ａとの間、及び軸方向延出部２４の凸部２５ａと折り曲げ部３３の大径逃げ部３５との間に、ラビリンス隙間がそれぞれ形成される。   Further, as shown in FIGS. 6A and 6B, the axial relative position of the seal member 20 and the slinger 30 in a state where the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12, respectively. Between the projection 34 of the slinger 30 and the small diameter relief 26a of the axially extending portion 24, and the protruding portion 25a of the axially extending portion 24 and the projecting portion of the slinger 30 do not contact each other. Labyrinth gaps are respectively formed between the convex portion 25 a of the axially extending portion 24 and the large-diameter relief portion 35 of the bent portion 33.

この場合、シール部材２０の押し込み量がスリンガ３０の押し込み量よりも大きくなるように各押し込み量を調節することで、凸部２５でのシール部材２０とスリンガ３０との係止が解除され、シール部材２０とスリンガ３０とを外輪１１及び内輪１２に固定する。したがって、シール部材２０の押し込み量がスリンガ３０の押し込み量よりも大きくなるように各押し込み量を調節することで、凸部２５でのシール部材２０とスリンガ３０との係止が解除され、シール部材２０とスリンガ３０とを外輪１１及び内輪１２に固定する。   In this case, by adjusting each pressing amount so that the pressing amount of the sealing member 20 becomes larger than the pressing amount of the slinger 30, the engagement between the sealing member 20 and the slinger 30 at the convex portion 25 is released, and the seal is performed. The member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12. Therefore, by adjusting each pressing amount so that the pressing amount of the seal member 20 becomes larger than the pressing amount of the slinger 30, the locking between the seal member 20 and the slinger 30 at the convex portion 25 is released, and the seal member 20 and the slinger 30 are fixed to the outer ring 11 and the inner ring 12.

したがって、本実施形態の転がり軸受用密封装置４０、及び密封形転がり軸受１０によれば、スリンガ３０は、フランジ部３２の外径側端部からシール部材側へ軸方向に延びる折り曲げ部３３と、該折り曲げ部３３から径方向内側に突出する突出部３４と、をさらに備え、弾性部材２２は、スリンガ側へ軸方向に延出する軸方向延出部２４を備え、軸方向延出部２４の外周面は、少なくともフランジ部３２の突出部３４の軸方向幅ｗ２よりも広い範囲Ｗｂにおいて、突出部３４の内径ｄ２よりも小径の小径逃げ部２６ａを構成し、軸方向延出部２４は、その先端部の外周面に、突出部３４の内径ｄ２よりも大径の円環状の凸部２５ａを有し、スリンガ３０の折り曲げ部３３の内周面は、少なくとも凸部２５ａの軸方向幅Ｗｃよりも広い範囲ｗ３において、凸部２５ａの外径Ｄｄよりも大径の大径逃げ部３５を構成する。したがって、軸方向延出部２４の凸部２５ａとスリンガ３０の突出部３４とが接触することで、凸部２５ａを含む軸方向延出部２４が弾性変形して突出部３４を径方向外方に押圧することにより、シール部材２０とスリンガ３０とが着脱自在に一体となっており、転がり軸受１０に組み付ける際には、シール部材２０とスリンガ３０との軸方向相対位置を変えることにより、軸方向延出部２４の凸部２５ａとスリンガ３０の突出部３４とが非接触となり、スリンガ３０の突出部３４と軸方向延出部２４の小径逃げ部２６ａとの間、及び軸方向延出部２４の凸部２５ａと折り曲げ部３３の大径逃げ部３５との間に、ラビリンス隙間がそれぞれ形成される。これにより、シール部材２０とスリンガ３０の組立性向上に加えて、スリンガ３０とシール部材２０との間のラビリンス構造を長くすることができ、軸受の密封性をさらに向上することができる。
その他の構成及び作用については、第１実施形態のものと同様である。 Therefore, according to the rolling bearing sealing device 40 and the sealed rolling bearing 10 of the present embodiment, the slinger 30 has the bent portion 33 axially extending from the outer diameter end of the flange portion 32 toward the sealing member; The elastic member 22 further includes an axially extending portion 24 axially extending toward the slinger side, and the projecting portion 34 protrudes radially inward from the bent portion 33. The outer peripheral surface constitutes a small diameter relief portion 26a having a diameter smaller than the inner diameter d2 of the projecting portion 34, at least in a range Wb wider than the axial width w2 of the projecting portion 34 of the flange portion 32. The outer peripheral surface of the tip has an annular convex portion 25a having a diameter larger than the inner diameter d2 of the protruding portion 34, and the inner peripheral surface of the bent portion 33 of the slinger 30 has at least the axial width Wc of the convex portion 25a. Wider than w In, than the outer diameter Dd of the projections 25a constituting the large 径逃-up part 35 of larger diameter. Therefore, when the convex portion 25a of the axially extending portion 24 and the projecting portion 34 of the slinger 30 contact with each other, the axially extending portion 24 including the convex portion 25a is elastically deformed and the projecting portion 34 is radially outward The sealing member 20 and the slinger 30 are detachably integrated with each other by pressing the shaft, and when assembled to the rolling bearing 10, the axial relative position between the sealing member 20 and the slinger 30 is changed to thereby Between the protrusion 34 of the slinger 30 and the small diameter relief 26 a of the axially extending portion 24 and the axially extending portion, the protrusion 25 a of the direction extending portion 24 and the protrusion 34 of the slinger 30 do not contact with each other. Labyrinth gaps are respectively formed between the convex portions 25 a of 24 and the large diameter relief portions 35 of the bent portions 33. Thereby, in addition to the improvement in the assemblability of the seal member 20 and the slinger 30, the labyrinth structure between the slinger 30 and the seal member 20 can be lengthened, and the sealability of the bearing can be further improved.
The other configurations and actions are similar to those of the first embodiment.

尚、本発明は、前述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。
上記実施形態では、玉軸受について説明したが、本発明の転がり軸受はこれに限定されず、任意の転がり軸受に適用可能である。
また、本発明のシール部材は、リップ部の形状も任意に構成することができる。 The present invention is not limited to the above-described embodiment, and appropriate modifications, improvements, and the like can be made.
Although the said embodiment demonstrated the ball bearing, the rolling bearing of this invention is not limited to this, It is applicable to arbitrary rolling bearings.
In addition, the seal member of the present invention can be arbitrarily configured in the shape of the lip portion.

１０ 密封形転がり軸受
１１ 外輪
１１ａ 外輪軌道面
１２ 内輪
１２ａ 内輪軌道面
１３ 玉（転動体）
２０ シール部材
２１ 芯金
２２ 弾性部材
２３ａ、２３ｂ、２３ｃ リップ部
２４ 軸方向延出部
２５，２５ａ 凸部
２６ 逃げ部
２６ａ 小径逃げ部
３０ スリンガ
３１ 円筒部
３２ フランジ部
３２ａ 外径側端部
３３ 折り曲げ部
３４ 突出部
３５ 大径逃げ部
４０ 転がり軸受用密封装置 DESCRIPTION OF SYMBOLS 10 Sealed type rolling bearing 11 Outer ring 11a Outer ring raceway surface 12 Inner ring 12a Inner ring raceway surface 13 Ball (rolling element)
Reference Signs List 20 seal member 21 core metal 22 elastic members 23a, 23b, 23c lip portion 24 axially extending portion 25, 25a convex portion 26 relief portion 26a small diameter relief portion 30 slinger 31 cylindrical portion 32 flange portion 32a outer diameter side end portion 33 bending Part 34 Protrusion part 35 Large diameter clearance part 40 Sealing device for rolling bearing

Claims (6)

環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、外輪の内周面に取り付けて使用されるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、内輪の外周面に前記円筒部を圧入固定して使用されるスリンガと、
を備え、前記シール部材と前記スリンガとが互いに軸方向に対向配置されて、着脱自在に一体となる転がり軸受用密封装置であって、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の内周面は、少なくとも前記フランジ部の前記外径側端部の軸方向幅よりも広い範囲において、前記フランジ部の外径よりも大径の逃げ部を構成し、
前記軸方向延出部は、その先端部の内周面に、前記フランジ部の外径よりも小径の円環状の凸部を有し、
前記軸方向延出部の凸部と前記フランジ部の外径側端部とが接触することで、前記軸方向延出部が径方向に弾性変形して前記フランジ部を径方向内方に押圧することにより、前記シール部材と前記スリンガとが着脱自在に一体となっており、
前記転がり軸受に組み付ける際には、前記シール部材と前記スリンガとの軸方向相対位置を変えることにより、前記軸方向延出部と前記フランジ部の外径側端部とが非接触となり、前記フランジ部の外径側端部と前記軸方向延出部の逃げ部との間にラビリンス隙間が形成され、前記軸方向延出部の凸部と前記フランジ部の外径側端部とが軸方向から見てオーバーラップすることを特徴とする転がり軸受用密封装置。 A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side and attached to the inner peripheral surface of the outer ring;
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring,
A sealing device for a rolling bearing in which the sealing member and the slinger are disposed to face each other in the axial direction, and are detachably integrated.
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The inner circumferential surface of the axially extending portion constitutes a relief portion having a diameter larger than the outer diameter of the flange portion, at least in a range wider than the axial width of the outer diameter side end portion of the flange portion.
The axially extending portion has, on an inner peripheral surface of a tip end portion thereof, an annular convex portion having a diameter smaller than the outer diameter of the flange portion,
Said axial By convex portion of the extending portion and the outer diameter side end portion of the flange portion is in contact, presses the flange portion and the axial extending portion is elastically deformed in the radial direction inward in the radial direction , The sealing member and the slinger are detachably integrated with each other,
Wherein when assembling the rolling bearing, by varying the relative axial position between the said sealing member slinger, and said axial extending portion and the flange portion of the outer diameter side end portion is Ri Do not in contact, A labyrinth gap is formed between the outer diameter side end of the flange and the relief of the axially extending portion, and the convex of the axially extending portion and the outer diameter end of the flange are A sealing device for a rolling bearing characterized by overlapping as viewed in the axial direction . 前記弾性部材は、前記スリンガ側へ軸方向に延出するに従って径方向外方に延びる他のシールリップ部をさらに備え、
前記他のシールリップ部は、前記転がり軸受に組み付ける際には、前記スリンガと接触し、前記シール部材と前記スリンガとが着脱自在に一体となっている際には、前記スリンガと非接触となることを特徴とする請求項１に記載の転がり軸受用密封装置。 The elastic member further includes another seal lip portion extending radially outward as it extends axially toward the slinger side,
The other seal lip portion is in contact with the slinger when assembled to the rolling bearing, and is not in contact with the slinger when the seal member and the slinger are detachably integrated. rolling bearing sealing device according to claim 1, characterized in that. 外輪と、
内輪と、
前記外輪と前記内輪との間に配置される複数の転動体と、
環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、前記外輪の内周面に取り付けられるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、前記内輪の外周面に前記円筒部が圧入固定されるスリンガと、
を備える密封形転がり軸受であって、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の内周面は、前記スリンガの前記フランジ部と軸方向同位置で、且つ、少なくとも前記フランジ部の外径側端部の軸方向幅よりも広い範囲において、前記フランジ部の外径よりも大径の逃げ部を構成し、前記フランジ部の外径側端部と前記軸方向延出部の逃げ部との間にラビリンス隙間が形成され、
前記軸方向延出部は、その先端部の内周面に、前記フランジ部の外径よりも小径の円環状の凸部を有し、前記軸方向延出部の凸部と前記フランジ部の外径側端部とが軸方向から見てオーバーラップし、前記スリンガが前記内輪に対して、前記シール部材が前記外輪に対して、それぞれ軸方向で突き当て固定されていることを特徴とする密封形転がり軸受。 Outer ring,
With the inner ring,
A plurality of rolling elements disposed between the outer ring and the inner ring;
A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side, the seal member being attached to the inner circumferential surface of the outer ring;
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring;
A sealed rolling bearing comprising:
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The inner peripheral surface of the axially extending portion is axially the same position as the flange portion of the slinger and at least wider than the axial width of the outer diameter side end portion of the flange portion. A relief portion having a diameter larger than the outer diameter of the second portion, and a labyrinth gap is formed between the outer diameter side end portion of the flange portion and the relief portion of the axially extending portion;
Said axial extension portion, the inner peripheral surface of the tip portion, have a convex portion of the small-diameter annular than the outer diameter of the flange portion, the convex portion of the axial extension portion of the flange portion The outer diameter side end portions overlap with each other when viewed in the axial direction, and the slinger is characterized in that the seal member is axially butted against and fixed to the inner ring and the outer ring. Sealed type rolling bearing. 前記弾性部材は、前記スリンガ側へ軸方向に延出するに従って径方向外方に延び、前記スリンガと接触する他のシールリップ部をさらに備えることを特徴とする請求項３に記載の密封形転がり軸受。 The sealed rolling device according to claim 3 , wherein the elastic member further includes another seal lip portion extending radially outward as it extends in the axial direction toward the slinger side and in contact with the slinger. bearing. 環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、外輪の内周面に取り付けて使用されるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、内輪の外周面に前記円筒部を圧入固定して使用されるスリンガと、
を備え、前記シール部材と前記スリンガとが互いに軸方向に対向配置されて、着脱自在に一体となる転がり軸受用密封装置であって、
前記スリンガは、前記フランジ部の外径側端部から前記シール部材側へ軸方向に延びる折り曲げ部と、該折り曲げ部から径方向内側に突出する突出部と、をさらに備える単一の部材によって構成され、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の外周面は、少なくとも前記フランジ部の前記突出部の軸方向幅よりも広い範囲において、前記突出部の内径よりも小径の小径逃げ部を構成し、
前記軸方向延出部は、その先端部の外周面に、前記突出部の内径よりも大径の円環状の凸部を有し、
前記スリンガの前記折り曲げ部の内周面は、少なくとも前記凸部の軸方向幅よりも広い範囲において、前記凸部の外径よりも大径の大径逃げ部を構成し、
前記軸方向延出部の前記凸部と前記スリンガの前記突出部とが接触することで、前記凸部を含む前記軸方向延出部が径方向に弾性変形して前記突出部を径方向外方に押圧することにより、前記シール部材と前記スリンガとが着脱自在に一体となっており、
前記転がり軸受に組み付ける際には、前記シール部材と前記スリンガとの軸方向相対位置を変えることにより、前記軸方向延出部の前記凸部と前記スリンガの前記突出部とが非接触となり、前記スリンガの前記突出部と前記軸方向延出部の前記小径逃げ部との間、及び前記軸方向延出部の前記凸部と前記折り曲げ部の前記大径逃げ部との間に、ラビリンス隙間がそれぞれ形成され、前記軸方向延出部の凸部と前記スリンガの突出部とが軸方向から見てオーバーラップすることを特徴とする転がり軸受用密封装置。 A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side and attached to the inner peripheral surface of the outer ring;
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring,
A sealing device for a rolling bearing in which the sealing member and the slinger are disposed to face each other in the axial direction, and are detachably integrated.
The slinger includes: the flange portion of the outer diameter side end portion from the sealing member side extending bent portion in the axial direction to a projection projecting radially inwardly from said bent portion, by a single member Ru further comprising a Configured and
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The outer peripheral surface of the axially extending portion constitutes a small diameter relief portion having a diameter smaller than the inner diameter of the projecting portion, at least in a range wider than the axial width of the projecting portion of the flange portion.
The axially extending portion has an annular convex portion having a diameter larger than the inner diameter of the protruding portion on the outer peripheral surface of the tip end portion,
The inner circumferential surface of the bent portion of the slinger constitutes a large diameter relief portion larger in diameter than the outer diameter of the convex portion, at least in a range wider than the axial width of the convex portion;
When the convex portion of the axially extending portion contacts the protruding portion of the slinger, the axially extending portion including the convex portion is elastically deformed in the radial direction, and the protruding portion is radially outward And the sealing member and the slinger are detachably integrated with each other.
When assembling to the rolling bearing, by changing the axial relative position between the seal member and the slinger, the convex portion of the axially extending portion and the protrusion of the slinger do not come in contact with each other. A labyrinth gap is formed between the protrusion of the slinger and the small diameter relief portion of the axial extension, and between the convex portion of the axial extension and the large diameter relief of the bent portion. A sealing device for a rolling bearing , wherein each of the convex portion of the axially extending portion and the protruding portion of the slinger overlap when viewed from the axial direction . 外輪と、
内輪と、
前記外輪と前記内輪との間に配置される複数の転動体と、
環状の芯金と、内径側にシールリップ部を備える弾性部材とを有し、前記外輪の内周面に取り付けられるシール部材と、
円筒部と、該円筒部の軸方向端部から径方向外側に延びる環状のフランジ部とを有し、前記内輪の外周面に前記円筒部が圧入固定されるスリンガと、
を備える密封形転がり軸受であって、
前記スリンガは、前記フランジ部の外径側端部から前記シール部材側へ軸方向に延びる折り曲げ部と、該折り曲げ部から径方向内側に突出する突出部と、をさらに備える単一の部材によって構成され、
前記弾性部材は、前記スリンガ側へ軸方向に延出する軸方向延出部を備え、前記軸方向延出部は前記芯金よりもスリンガ側に延出すると共に、
前記軸方向延出部の外周面は、前記スリンガの前記突出部と軸方向同位置で、且つ、少なくとも前記フランジ部の前記突出部の軸方向幅よりも広い範囲において、前記突出部の内径よりも小径の小径逃げ部を構成し、前記スリンガの前記突出部と前記軸方向延出部の前記小径逃げ部との間にラビリンス隙間を形成し、
前記軸方向延出部は、その先端部の外周面に、前記突出部の内径よりも大径の円環状の凸部を有し、
前記スリンガの前記折り曲げ部の内周面は、前記軸方向延出部の前記凸部と軸方向同位置で、且つ、少なくとも前記凸部の軸方向幅よりも広い範囲において、前記凸部の外径よりも大径の大径逃げ部を構成し、前記軸方向延出部の前記凸部と前記折り曲げ部の前記大径逃げ部との間にラビリンス隙間を形成し、前記軸方向延出部の凸部と前記突出部とが軸方向から見てオーバーラップし、前記スリンガが前記内輪に対して、前記シール部材が前記外輪に対して、それぞれ軸方向で突き当て固定されていることを特徴とする密封形転がり軸受。 Outer ring,
With the inner ring,
A plurality of rolling elements disposed between the outer ring and the inner ring;
A seal member having an annular core metal and an elastic member provided with a seal lip portion on the inner diameter side, the seal member being attached to the inner circumferential surface of the outer ring;
A slinger having a cylindrical portion and an annular flange portion extending radially outward from an axial end of the cylindrical portion, the cylindrical portion being press-fitted and fixed to the outer peripheral surface of the inner ring;
A sealed rolling bearing comprising:
The slinger includes: the flange portion of the outer diameter side end portion from the sealing member side extending bent portion in the axial direction to a projection projecting radially inwardly from said bent portion, by a single member Ru further comprising a Configured and
The elastic member includes an axially extending portion extending in the axial direction toward the slinger side, and the axially extending portion extends toward the slinger side relative to the core metal,
The outer peripheral surface of the axially extending portion is at the same axial position as the projecting portion of the slinger and at least in a range wider than the axial width of the projecting portion of the flange portion, than the inner diameter of the projecting portion A small diameter relief portion having a small diameter, and a labyrinth gap is formed between the protrusion of the slinger and the small diameter relief portion of the axially extending portion;
The axially extending portion has an annular convex portion having a diameter larger than the inner diameter of the protruding portion on the outer peripheral surface of the tip end portion,
The inner peripheral surface of the bent portion of the slinger is at the same axial position as the convex portion of the axially extending portion, and at least in a range wider than the axial width of the convex portion. A large diameter relief portion having a diameter larger than the diameter is formed, and a labyrinth clearance is formed between the convex portion of the axially extending portion and the large diameter relief portion of the bent portion, and the axially extending portion The projection and the projection overlap as viewed in the axial direction, and the slinger abuts against the inner ring and the seal member abuts against the outer ring in the axial direction, respectively. Sealed type rolling bearing.
JP2014251165A 2014-10-30 2014-12-11 Sealing device for rolling bearing and sealing type rolling bearing Expired - Fee Related JP6519165B2 (en)

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