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JP2005330987A - Sealed rolling bearings and seals - Google Patents

Sealed rolling bearings and seals Download PDF

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Publication number
JP2005330987A
JP2005330987A JP2004147780A JP2004147780A JP2005330987A JP 2005330987 A JP2005330987 A JP 2005330987A JP 2004147780 A JP2004147780 A JP 2004147780A JP 2004147780 A JP2004147780 A JP 2004147780A JP 2005330987 A JP2005330987 A JP 2005330987A
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Japan
Prior art keywords
lip
bearing
axial
inner ring
mating member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2004147780A
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Japanese (ja)
Inventor
Akira Takahashi
明 高橋
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NSK Ltd
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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
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
    • 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
    • F16C33/7883—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 mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant

Landscapes

  • 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)

Abstract

【課題】
密封シールのシールリップが泥水や砂などの異物の軸受内部への侵入を防止し、高密封性を維持することが出来る密封シールを備えたころがり軸受および密封シールを提供する。
【解決手段】
アキシャルリップが主リップと副リップを有し、フランジ部と主リップと副リップとで環状空間を画成し、該環状空間にグリースを充填したことを特徴とする密封シールを備えたころがり軸受によって、また前記密封シールによって課題の解決を図る。
【選択図】図１【Task】
Provided are a rolling bearing and a hermetic seal provided with a hermetic seal in which a seal lip of the hermetic seal prevents foreign matters such as muddy water and sand from entering the inside of the bearing and maintains high hermeticity.
[Solution]
An axial lip has a main lip and a sub lip, and an annular space is defined by the flange portion, the main lip and the sub lip, and the annular space is filled with grease. The problem is solved by the hermetic seal.
[Selection] Figure 1

Description

本発明は、密封ころがり軸受、特に、密封耐久性を向上した自動車車輪用密封ころがり軸受および密封シールに関する。   The present invention relates to a sealed rolling bearing, and more particularly to a sealed rolling bearing for an automobile wheel and a sealed seal with improved sealing durability.

従来、車輪用密封ころがり軸受Ｈは、図５に示すように、外輪１ｚ、内輪２ｚ、前記外内輪の間に介装された転動体３ｚ，３ｚ、及び密封シール４ｚ，４ｚとからなっており、密封シール４ｚとして、金属製の芯金４１ｚにゴム等弾性シール部材４５ｚを焼付け、該弾性シール部材４５ｚに１つのアキシャルリップ４５１ｚと２つのラジアルリップ４５２ｚ，４５３ｚとを設け、アキシャルリップ４５１ｚを軸受の外側に近く、ラジアルリップ４５２ｚ，４５３ｚを内側に近く配置し、これらのリップに対向させて金属製のスリンガ６０ｚを相手部材として設け、芯金４１ｚを外輪内周面１ｃｚの、そして、スリンガ６０ｚを内輪外周面２ｄｚの所定位置にそれぞれ嵌合固定し、アキシャルリップ４５１ｚをスリンガ６０ｚのフランジ６２ｚに、ラジアルリップ４５２ｚ，４５３ｚをスリンガ６０ｚの円筒部６１ｚにそれぞれ摺接させて密封シール部を構成しているものが広く使用されている。   Conventionally, as shown in FIG. 5, the wheel rolling bearing H for a wheel is composed of an outer ring 1z, an inner ring 2z, rolling elements 3z and 3z interposed between the outer and inner rings, and sealing seals 4z and 4z. As the sealing seal 4z, an elastic seal member 45z such as rubber is baked on the metal core bar 41z, and one axial lip 451z and two radial lips 452z and 453z are provided on the elastic seal member 45z, and the axial lip 451z is a bearing. The radial lips 452z and 453z are arranged close to the inner side, a metal slinger 60z is provided as a mating member so as to face these lips, and the cored bar 41z is provided on the inner peripheral surface 1cz of the outer ring and the slinger 60z. Are fitted and fixed at predetermined positions on the outer peripheral surface 2dz of the inner ring, and the axial lip 451z is connected to the flange 62z of the slinger 60z. , Radial lip 452Z, what constitutes a hermetic seal portion respectively brought into sliding contact to the cylindrical portion 61z of the slinger 60z to 453z are widely used.

しかしながら、特に、軸受の外方に近い位置に配置されているアキシャルリップ４５１ｚのスリンガ６０ｚとの摺接面に泥水や砂などの異物が噛みこむことによりリップが磨耗したりする。また、長期の使用や高温に晒されることによる変形を起こしたりすることもあって、リップのスリンガへのリップ圧力が低下して異物が侵入してくると、軸受の内方に近く配置されているラジアルリップ４５２ｚ，４５３ｚをも通過して、軸受の内部に前記異物が侵入するという問題が生じる虞がある。
異物の侵入の問題に対する提案がなされている。（例えば、特許文献１参照）
特開平１１−８２５２６号公報 However, in particular, foreign matter such as muddy water or sand bites into the sliding contact surface with the slinger 60z of the axial lip 451z disposed at a position close to the outside of the bearing, so that the lip is worn. Also, it may cause deformation due to long-term use or exposure to high temperatures, so if the lip pressure on the lip slinger decreases and foreign matter enters, it will be placed close to the inside of the bearing. There is a risk that the foreign matter may enter the inside of the bearing through the radial lips 452z and 453z.
Proposals have been made for the problem of foreign body intrusion. (For example, see Patent Document 1)
Japanese Patent Laid-Open No. 11-82526

特許文献１は軸受内部から外方に向けて順番に非接触型の副リップと接触型の主リップと非接触型の外側リップとを設け、転動体に近接した副リップと該副リップの外側の配置された主リップとの間にグリース溜りを形成して、該グリース溜りにグリースを充填してグリースシールとし、水や塵埃の侵入を防止しようと言う提案である。しかしながら、グリースシールは転動体に近接した位置にあるので、該グリースシールまで水が浸入し、この部分を通過すると近接した位置にある転動体は水に接触し、潤滑剤の劣化や錆の発生の虞がある。   In Patent Document 1, a non-contact-type sub lip, a contact-type main lip, and a non-contact-type outer lip are provided in order from the inside to the outside of the bearing. In this proposal, a grease reservoir is formed between the main lip and the grease and the grease reservoir is filled with grease to form a grease seal to prevent intrusion of water and dust. However, since the grease seal is in a position close to the rolling element, water enters the grease seal, and when passing through this part, the rolling element in the close position comes into contact with water, causing deterioration of the lubricant and generation of rust. There is a risk.

本発明はこのような点に鑑みなされたもので、密封耐久性の高い密封シールを備えた密封ころがり軸受を提供することを目的とし、また、密封耐久性の高い密封シールを提供することを目的としている。   The present invention has been made in view of the above points, and aims to provide a sealed rolling bearing provided with a hermetic seal with high sealing durability, and to provide a hermetic seal with high sealing durability. It is said.

上記の目的を達成するため、本発明は、
外輪と、
内輪と、
前記外輪と前記内輪間に介装される転動体と、
前記外輪と前記内輪との間に形成される軸受空間を密封するための密封シールと、
を有し、
前記密封シールが、外輪に固定される固定部材と、
前記固定部材と一体的に形成される弾性シール部材と、
を有し、
前記弾性シール部材が、軸受の軸方向外方に向けて延在するアキシャルリップと、前記アキシャルリップよりも軸受内方に配置され、半径方向内方に向けて延在するラジアルリップと、を有し
前記内輪には、前記弾性シール部材と摺接する相手部材が設けられている密封ころがり軸受において、
前記密封シールの前記アキシャルリップが前記相手部材と摺接する主リップと前記相手部材とラビリンスを形成する副リップとを有し、かつ、前記相手部材と前記主リップと前記副リップとで環状空間を画成し、該環状空間にグリースを充填したことを特徴とする密封ころがり軸受を提供する。 In order to achieve the above object, the present invention provides:
Outer ring,
Inner ring,
A rolling element interposed between the outer ring and the inner ring;
A hermetic seal for sealing a bearing space formed between the outer ring and the inner ring;
Have
The sealing seal is a fixing member fixed to the outer ring;
An elastic seal member formed integrally with the fixing member;
Have
The elastic seal member has an axial lip that extends outward in the axial direction of the bearing, and a radial lip that is disposed inward of the bearing relative to the axial lip and extends inward in the radial direction. In the sealed roller bearing in which the inner ring is provided with a mating member that is in sliding contact with the elastic seal member,
The axial lip of the hermetic seal has a main lip that is in sliding contact with the mating member and a sub lip that forms a labyrinth with the mating member, and an annular space is formed by the mating member, the main lip, and the sub lip. The present invention provides a sealed rolling bearing characterized in that the annular space is filled with grease.

また、本発明は、
密封シールが、外輪に固定される固定部材と、
前記固定部材と一体的に形成される弾性シール部材と、
を有し、
前記弾性シール部材が、軸受の軸方向外方に向けて延在するアキシャルリップと、前記アキシャルリップよりも軸受内方に配置され、半径方向内方に向けて延在するラジアルリップとを有し、内輪に設けられる相手部材に摺接する密封シールにおいて、
前記密封シールの前記アキシャルリップが前記相手部材と摺接する主リップと前記相手部材とラビリンスを形成する副リップとを有し、かつ、前記相手部材と前記主リップと前記副リップとで環状空間を画成し、該環状空間にグリースを充填することを特徴とする密封シールを提供する。 The present invention also provides:
A sealing member, a fixing member fixed to the outer ring;
An elastic seal member formed integrally with the fixing member;
Have
The elastic seal member has an axial lip extending outward in the axial direction of the bearing, and a radial lip disposed inward of the bearing relative to the axial lip and extending radially inward. In a hermetic seal in sliding contact with a mating member provided on the inner ring,
The axial lip of the hermetic seal has a main lip that is in sliding contact with the mating member and a sub lip that forms a labyrinth with the mating member, and an annular space is formed by the mating member, the main lip, and the sub lip. A hermetic seal is provided that is defined and filled with grease in the annular space.

また、本発明は、
相手部材が、内輪に固定されたスリンガであることを特徴とする密封ころがり軸受を提供する。 The present invention also provides:
Provided is a sealed rolling bearing characterized in that a mating member is a slinger fixed to an inner ring.

また、本発明は、
相手部材が、内輪と一体的に形成されているハブフランジであることを特徴とする密封ころがり軸受を提供する。 The present invention also provides:
There is provided a sealed rolling bearing characterized in that a mating member is a hub flange formed integrally with an inner ring.

本発明によれば、密封耐久性の高いころがり軸受が得られる。また、密封耐久性の高い密封シールが得られる。   According to the present invention, a rolling bearing with high sealing durability can be obtained. Moreover, a hermetic seal with high sealing durability can be obtained.

以下、本発明の実施形態に係わる密封ころがり軸受および密封シールを図面を参照しつつ説明する。   Hereinafter, a sealed rolling bearing and a hermetic seal according to an embodiment of the present invention will be described with reference to the drawings.

（実施形態１）
図１、図２によって本発明の実施形態１の密封ころがり軸受を説明する。
図１は本実施形態の密封ころがり軸受のＸ−Ｘ中心線より上側半分を示している断面図である。図２は図１の破線部Ａの拡大図である。 (Embodiment 1)
The sealed rolling bearing according to the first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a cross-sectional view showing the upper half of the sealed rolling bearing of the present embodiment from the XX center line. FIG. 2 is an enlarged view of a broken line portion A in FIG.

図１において、密封ころがり軸受Ｈｕは、複列の内周軌道１ａ１，１ａ２を有する外輪１と、内周軌道１ａ１，１ａ２に対向する外周軌道２ａ１，２ｂ１を有する一対の内輪要素２ａ，２ｂと、密封ころがり軸受Ｈｕの軸方向両端部で外輪１と、内輪要素２ａ，２ｂ間の空間を密封する密封シール４と、外輪１、内輪要素２ａ，２ｂ間に介装されているボール３，３と、ボール３，３を保持する保持器８，８とから構成されている。 In FIG. 1, a sealed rolling bearing Hu includes an outer ring 1 having double-row inner circumferential tracks 1a 1 and 1a 2 and a pair of inner rings having outer circumferential tracks 2a 1 and 2b 1 facing the inner circumferential tracks 1a 1 and 1a 2. It is interposed between the outer ring 1 and the inner ring elements 2a, 2b, the outer ring 1, the outer ring 1, and the sealing ring 4 that seals the space between the inner ring elements 2a, 2b at both axial ends of the sealed rolling bearing Hu. And the cages 8 and 8 for holding the balls 3 and 3.

外輪１は軸方向両端部内周に内周軌道１ａ１，１ａ２に連なる円筒部１ｃを備えている。 The outer ring 1 includes cylindrical portions 1c connected to the inner peripheral tracks 1a 1 and 1a 2 on the inner periphery of both axial ends.

内輪要素２ａ，２ｂは、外周軌道２ａ１，２ｂ１に連設されている小径の終端部２ｃ、２ｃでそれぞれ互いに突き当てられて、全体として一対の内輪要素２ａ，２ｂからなる複列の内輪２を形成している。 The inner ring elements 2a and 2b are abutted against each other by small-diameter end portions 2c and 2c connected to the outer circumferential tracks 2a 1 and 2b 1 , respectively, and as a whole, a double row inner ring composed of a pair of inner ring elements 2a and 2b. 2 is formed.

保持器８は樹脂製の冠型保持器で、図１中、ころがり軸受の中央部からボール３を抱くように組み込まれ、ボール３を保持している。   The cage 8 is a resin-made crown cage, and is assembled so as to hold the ball 3 from the center of the rolling bearing in FIG.

密封シール４を図２と併せて説明する。
密封シール４は、芯金４１と芯金４１に焼き付けられている弾性シール部材４５とからなり、密封シール４は後述する相手部材とによって密封シール部を形成している。 The hermetic seal 4 will be described in conjunction with FIG.
The hermetic seal 4 includes a cored bar 41 and an elastic seal member 45 that is baked on the cored bar 41. The hermetic seal 4 forms a hermetic seal portion with a mating member described later.

芯金４１は円筒面４２と円筒面４２に直角に半径方向内方に折り曲げられたつば部４３を有し、円筒面４２とつば部４３で形成する内側面４４に弾性シール部材４５が接着され、該弾性シール部材は複数のシールリップを有している。   The cored bar 41 has a cylindrical surface 42 and a flange portion 43 bent radially inwardly at right angles to the cylindrical surface 42, and an elastic seal member 45 is bonded to an inner surface 44 formed by the cylindrical surface 42 and the flange portion 43. The elastic seal member has a plurality of seal lips.

芯金４１の円筒面４２は外輪１の端部内周の円筒部１ｃに嵌合固定されている。嵌合はつば部４３の外側面をボール３に向けて取り付けられている。   The cylindrical surface 42 of the cored bar 41 is fitted and fixed to the cylindrical portion 1 c on the inner periphery of the end of the outer ring 1. The fitting is attached with the outer surface of the collar portion 43 facing the ball 3.

複数のシールリップは弾性シール部材の半径方向略中央部から軸受の軸方向外方に延在するアキシャルリップ４５１と、アキシャルリップ４５１の半径方向内方に設けられている軸方向に軸受外側の第１及び内側の第２ラジアルリップ４５２，４５３とから成っている。   The plurality of seal lips include an axial lip 451 extending axially outward of the bearing from a substantially central portion in the radial direction of the elastic seal member, and an axially outer lip 451 provided radially inward of the axial lip 451. 1 and an inner second radial lip 452,453.

アキシャルリップ４５１は先端部が大径の主リップ４５１ａと小径の副リップ４５１ｂとに別れている。   The axial lip 451 is divided into a main lip 451a having a large diameter and a sub lip 451b having a small diameter at the tip.

スリンガ６０は円筒部６１と、円筒部６１に直角に半径方向外方に折り曲げられたフランジ６２を有し、フランジ６２が軸受の軸方向外方になるように、円筒部６１によって、内輪要素２ａ の外周面２ｄに嵌合固定されている。   The slinger 60 has a cylindrical portion 61 and a flange 62 bent radially outward at a right angle to the cylindrical portion 61, and the inner ring element 2a is formed by the cylindrical portion 61 so that the flange 62 is outward in the axial direction of the bearing. The outer peripheral surface 2d is fitted and fixed.

スリンガ６０はアキシャルリップ４５１、第１ラジアルリップ４５２および第２ラジアルリップ４５３が摺接する相手部材となり、アキシャルリップ４５１はスリンガ６０のフランジ６２と、第１ラジアルリップ４５２と第２ラジアルリップ４５３はスリンガ６０の円筒部６１と摺接する。
アキシャルリップ４５１の主リップ４５１ａとスリンガ６０のフランジ６２とは当接しているが、副リップ４５１ｂはラビリンスを形成していてフランジ６２に接触はしていない。 The slinger 60 is a mating member in which the axial lip 451, the first radial lip 452 and the second radial lip 453 are in sliding contact with each other. The cylindrical portion 61 is in sliding contact.
Although the main lip 451a of the axial lip 451 and the flange 62 of the slinger 60 are in contact with each other, the sub lip 451b forms a labyrinth and does not contact the flange 62.

主リップ４５１ａと副リップ４５１ｂとフランジ６２とで、環状空間Ｓを形成し、該環状空間ＳにグリースＧを充填してある。このことにより、密封効果はさらに向上する。   An annular space S is formed by the main lip 451a, the sub lip 451b, and the flange 62, and the annular space S is filled with grease G. This further improves the sealing effect.

密封シール４とスリンガ６０のフランジ６２は、アキシャルリップ４５１の主リップ４５１ａがフランジ６２に所定のリップ圧力で当接するように、外輪１の内周円筒面１ｃおよび内輪端部外周面２ｄの所定の位置に固定されている。
第１ラジアルリップ４５２と第２ラジアルリップ４５３もスリンガ６０の円筒部６１の外周面と所定のリップ圧力で当接するようになっている。 The sealing seal 4 and the flange 62 of the slinger 60 are provided on the inner peripheral cylindrical surface 1c of the outer ring 1 and the inner peripheral end portion outer peripheral surface 2d so that the main lip 451a of the axial lip 451 contacts the flange 62 with a predetermined lip pressure. Fixed in position.
The first radial lip 452 and the second radial lip 453 are also in contact with the outer peripheral surface of the cylindrical portion 61 of the slinger 60 with a predetermined lip pressure.

ここで、弾性シール部材は、ニトリルゴム、水素添加ニトリルゴム、フッ素ゴムなどから選択できる。   Here, the elastic seal member can be selected from nitrile rubber, hydrogenated nitrile rubber, fluororubber, and the like.

（実施形態２）
図３、図４によって本発明の実施形態２の密封ころがり軸受Ｕｈを説明する。
図３は本実施形態の密封ころがり軸受のＹ−Ｙ中心線より上側半分を示している断面図である。図４は図３の破線部Ｂの拡大図である。 (Embodiment 2)
The sealed rolling bearing Uh according to the second embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a cross-sectional view showing the upper half of the sealed rolling bearing of this embodiment from the YY center line. FIG. 4 is an enlarged view of a broken line portion B in FIG.

同図において、ハブＵ２は外端側に車輪（図示略）を取り付けるためのハブフランジＵ２ｆと、軸方向中央部の外周面Ｕ２ｍのうちハブフランジ側外周面には、前記外周面に直接第１軌道Ｕ２ａが形成されている。 In the figure, a hub U 2 has a hub flange U 2 f for mounting a wheel (not shown) on the outer end side, and an outer peripheral surface U 2 m in the axial center portion on the hub flange side outer peripheral surface. The first track U 2 a is formed directly on the surface.

車両中心側の外周面はハブフランジ側外周面より段部Ｕ２ｃを介して、小径外周面Ｕ２ｎが設けられ、該小径外周面Ｕ２ｎの車両中心側終端部は、ボルトＢおよびナットＮにより締結されている。 The outer peripheral surface of the vehicle center side via a stepped portion U 2 c than the hub flange outer circumferential surface is provided with a small-diameter outer peripheral surface U 2 n, the vehicle center-side end portion of the small-diameter outer peripheral surface U 2 n is a bolt B and Fastened with a nut N.

内輪要素Ｕ３はハブＵ２の小径外周部Ｕ２ｎに外嵌された後、段部Ｕ２ｃとナットＮによって固定されている。内輪要素Ｕ３の外周には第２軌道Ｕ２ｂが形成されている。 The inner ring element U 3 is externally fitted to the small-diameter outer peripheral portion U 2 n of the hub U 2 and then fixed by the stepped portion U 2 c and the nut N. A second track U 2 b is formed on the outer periphery of the inner ring element U 3 .

外輪Ｕ１はハブＵ２の第１軌道Ｕ２ａおよび第２軌道Ｕ２ｂに対向する複列の内周軌道Ｕ１ａ，Ｕ１ｂを有している。外輪Ｕ１の外周部には車体に取り付けるフランジＵ１ｆが一体に設けられている。 The outer ring U 1 has double-row inner circumferential tracks U 1 a and U 1 b that face the first track U 2 a and the second track U 2 b of the hub U 2 . A flange U 1 f attached to the vehicle body is integrally provided on the outer peripheral portion of the outer ring U 1 .

両端部にはハブＵ２と外輪Ｕ１との間の空間を密封する密封シールＵ４ａ，Ｕ４ｂが取り付けられている。
ハブフランジＵ２ｆ側の密封シールＵ４ａを図３の破線部Ｂを示している図４を参照しながら説明する。
鋼板からなる芯金Ｕ４１と、芯金Ｕ４１に接着された芯金を覆うゴムなどの弾性シール部材Ｕ４５からなる。芯金Ｕ４１は円筒部Ｕ４２と、円筒部Ｕ４２に略直角に半径方向内方に折り曲げられたつば部Ｕ４３が形成されている。つば部Ｕ４３には、弾性シール部材Ｕ４５がつば部Ｕ４３の軸方向外側を覆うように接着されている。弾性シール部材Ｕ４５の半径方向の略中央部には、軸受の軸方向外方に延在するアキシャルリップＵ４５１が設けられている。アキシャルリップＵ４５１の半径方向内方には、第１ラジアルリップＵ４５２および第１ラジアルリップＵ４５２より転動体Ｕ３側に第２ラジアルリップＵ４５３が形成されている。 Sealing seals U 4 a and U 4 b for sealing the space between the hub U 2 and the outer ring U 1 are attached to both ends.
The hermetic seal U 4 a on the hub flange U 2 f side will be described with reference to FIG. 4 showing a broken line portion B in FIG.
It consists of a core metal U 41 made of a steel plate and an elastic sealing member U 45 such as rubber covering the core metal bonded to the core metal U 41 . Core metal U 41 and the cylindrical portion U 42, the flange portion U 43 which substantially bent at a right angle radially inward to the cylindrical portion U 42 is formed. The flange portion U 43, are bonded so as to cover the axially outer resilient sealing member U 45 Gatsuba unit U 43. An axial lip U 451 extending outward in the axial direction of the bearing is provided at a substantially central portion in the radial direction of the elastic seal member U 45 . On the radially inner side of the axial lip U 451, a first radial lip U 452 and a second radial lip U 453 are formed on the rolling element U 3 side from the first radial lip U 452 .

アキシャルリップＵ４５１は先端部において、主リップＵ４５１ａとそれより小径の副リップＵ４５１ｂに別れている。本実施形態においては、相手部材は、ハブフランジＵ１ｆの軸受側平面になる。主リップＵ４５１ａはハブフランジＵ１ｆと当接している。副リップＵ４５１ｂはハブフランジＵ１ｆと非接触でラビリンスを形成している。主リップと副リップとハブフランジによって環状空間部Ｕｓを形成し、環状空間部ＵｓにグリースＵｇを充填して、密封効果を向上している。 The axial lip U 451 is divided at the tip into a main lip U 451 a and a sub-lip U 451 b having a smaller diameter. In the present embodiment, the mating member is a bearing-side plane of the hub flange U 1 f. The main lip U 451 a is in contact with the hub flange U 1 f. The sub lip U 451 b forms a labyrinth without contact with the hub flange U 1 f. An annular space portion Us is formed by the main lip, the sub lip, and the hub flange, and the annular space portion Us is filled with grease Ug to improve the sealing effect.

第１ラジアルリップＵ４５２及ぶ第２ラジアルリップＵ４５３はハブＵ２の軸外周部Ｕ２ｄに摺接している。
また、図３に示すように、車両中心側には内輪要素Ｕ３の端部外周部Ｕ３ｄと該外周部に対向する外輪の端部内周部Ｕ１ｄとの間に密封シール部Ｕ４ｂが取り付けられる。密封シール部Ｕ４ｂは本発明の実施形態１を使用しているので説明を省略する。なお、用途によっては、従来品も使用できる。 The first radial lip U 452 and the second radial lip U 453 are in sliding contact with the shaft outer peripheral portion U 2 d of the hub U 2 .
As shown in FIG. 3, a sealing seal portion U is provided between the end outer peripheral portion U 3 d of the inner ring element U 3 and the end inner peripheral portion U 1 d of the outer ring facing the outer peripheral portion on the vehicle center side. 4 b is attached. Since the seal seal portion U 4 b uses the first embodiment of the present invention, the description thereof is omitted. Depending on the application, conventional products can also be used.

本発明の実施形態１の中心線より上半分の断面図を示す。Sectional drawing of the upper half from the centerline of Embodiment 1 of this invention is shown. 図１の破線部Ａの拡大図を示す。The enlarged view of the broken-line part A of FIG. 1 is shown. 本発明の実施形態２の中心線より上半分の断面図を示す。Sectional drawing of the upper half from the centerline of Embodiment 2 of this invention is shown. 図３の破線部Ｂの拡大図を示す。The enlarged view of the broken-line part B of FIG. 3 is shown. 従来例の中心線より上半分の断面図を示す。Sectional drawing of the upper half from the centerline of a prior art example is shown.

符号の説明Explanation of symbols

Ｈｕ、Ｕｈ:密封ころがり軸受
１、Ｕ１：外輪
１ａ１、１ａ２、Ｕ１ａ、Ｕ１ｂ:内周軌道
２:内輪
Ｕ２：ハブ
Ｕ２ｆ:ハブフランジ
２ａ、２ｂ、Ｕ３:内輪要素
２ａ１、２ｂ１:外周軌道
Ｕ２ａ:第１軌道
Ｕ２ａ:第２軌道
４、Ｕ４ａ:密封シール
４１、Ｕ４１:芯金
４３、Ｕ４３：芯金のつば部
４５、Ｕ４５:弾性シール部材
４５１、Ｕ４５１:アキシャルリップ
４５１ａ、Ｕ４５１ａ:主リップ
４５１ｂ、Ｕ４５１ａ:副リップ
４５２、Ｕ４５２:第１ラジアルリップ
４５３、Ｕ４５３:第２ラジアルリップ
Ｓ、Ｕｓ:環状空間
Ｇ、Ｕｇ:グリース
６０:スリンガ
６１:スリンガの円筒部
６２:スリンガのフランジ Hu, Uh: Sealed rolling bearings 1, U 1 : Outer rings 1a 1 , 1a 2 , U 1 a, U 1 b: Inner ring race 2: Inner ring U 2 : Hub U 2 f: Hub flanges 2a, 2b, U 3 : Inner ring elements 2a 1 , 2b 1 : outer peripheral track U 2 a: first track U 2 a: second track 4, U 4 a: sealing seal 41, U 41 : core metal 43, U 43: core metal collar 45, U 45 : Elastic seal member 451, U 451 : Axial lip 451a, U 451 a: Main lip 451b, U 451 a: Sub lip 452, U 452 : First radial lip 453, U 453 : Second radial lip S, Us : Annular space G, Ug: grease 60: slinger 61: cylindrical part of slinger 62: flange of slinger

Claims (4)

外輪と、
内輪と、
前記外輪と前記内輪間に介装される転動体と、
前記外輪と前記内輪との間に形成される軸受空間を密封するための密封シールと、
を有し、
前記密封シールが、外輪に固定される固定部材と、
前記固定部材と一体的に形成される弾性シール部材と、
を有し、
前記弾性シール部材が、軸受の軸方向外方に向けて延在するアキシャルリップと、前記アキシャルリップよりも軸受内方に配置され、半径方向内方に向けて延在するラジアルリップと、を有し
前記内輪には、前記弾性シール部材と摺接する相手部材が設けられている密封ころがり軸受において、
前記密封シールの前記アキシャルリップが前記相手部材と摺接する主リップと前記相手部材とラビリンスを形成する副リップとを有し、かつ、前記相手部材と前記主リップと前記副リップとで環状空間を画成し、該環状空間にグリースを充填したことを特徴とする密封ころがり軸受。 Outer ring,
Inner ring,
A rolling element interposed between the outer ring and the inner ring;
A hermetic seal for sealing a bearing space formed between the outer ring and the inner ring;
Have
The sealing seal is a fixing member fixed to the outer ring;
An elastic seal member formed integrally with the fixing member;
Have
The elastic seal member has an axial lip that extends outward in the axial direction of the bearing, and a radial lip that is disposed inward of the bearing relative to the axial lip and extends inward in the radial direction. In the sealed roller bearing in which the inner ring is provided with a mating member that is in sliding contact with the elastic seal member,
The axial lip of the hermetic seal has a main lip that is in sliding contact with the mating member and a sub lip that forms a labyrinth with the mating member, and an annular space is formed by the mating member, the main lip, and the sub lip. A sealed rolling bearing, characterized in that the annular space is filled with grease. 密封シールが、外輪に固定される固定部材と、
前記固定部材と一体的に形成される弾性シール部材と、
を有し、
前記弾性シール部材が、軸受の軸方向外方に向けて延在するアキシャルリップと、前記アキシャルリップよりも軸受内方に配置され、半径方向内方に向けて延在するラジアルリップとを有し、内輪に設けられる相手部材に摺接する密封シールにおいて、
前記密封シールの前記アキシャルリップが前記相手部材と摺接する主リップと前記相手部材とラビリンスを形成する副リップとを有し、かつ、前記相手部材と前記主リップと前記副リップとで環状空間を画成し、該環状空間にグリースを充填することを特徴とする密封シール。 A sealing member, a fixing member fixed to the outer ring;
An elastic seal member formed integrally with the fixing member;
Have
The elastic seal member has an axial lip extending outward in the axial direction of the bearing, and a radial lip disposed inward of the bearing relative to the axial lip and extending radially inward. In a hermetic seal in sliding contact with a mating member provided on the inner ring,
The axial lip of the hermetic seal has a main lip that is in sliding contact with the mating member and a sub lip that forms a labyrinth with the mating member, and an annular space is formed by the mating member, the main lip, and the sub lip. A hermetic seal that is defined and filled with grease in the annular space. 相手部材が、内輪に固定されたスリンガであることを特徴とする請求項１に記載の密封ころがり軸受。   The sealed roller bearing according to claim 1, wherein the mating member is a slinger fixed to the inner ring. 相手部材が、内輪と一体的に形成されているハブフランジであることを特徴とする請求項１に記載の密封ころがり軸受。   The sealed roller bearing according to claim 1, wherein the mating member is a hub flange formed integrally with the inner ring.
JP2004147780A 2004-05-18 2004-05-18 Sealed rolling bearings and seals Withdrawn JP2005330987A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185080A (en) * 2007-01-29 2008-08-14 Nok Corp Sealing device
JP2008240949A (en) * 2007-03-28 2008-10-09 Jtekt Corp Sealing device
JP2009216139A (en) * 2008-03-07 2009-09-24 Jtekt Corp Sealing device for bearing
CN102654163A (en) * 2011-03-01 2012-09-05 美蓓亚株式会社 Rolling bearing, throttle valve device and abs device
JP2013007492A (en) * 2012-10-11 2013-01-10 Nsk Ltd Rolling bearing
JP2016080020A (en) * 2014-10-14 2016-05-16 Nok株式会社 Sealing device
US20210355995A1 (en) * 2018-11-12 2021-11-18 Nok Corporation Sealing device and method for applying grease thereto

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008185080A (en) * 2007-01-29 2008-08-14 Nok Corp Sealing device
JP2008240949A (en) * 2007-03-28 2008-10-09 Jtekt Corp Sealing device
JP2009216139A (en) * 2008-03-07 2009-09-24 Jtekt Corp Sealing device for bearing
CN102654163A (en) * 2011-03-01 2012-09-05 美蓓亚株式会社 Rolling bearing, throttle valve device and abs device
US20120223266A1 (en) * 2011-03-01 2012-09-06 Minebea Co., Ltd. Rolling bearing, throttle valve device and abs device
JP2012193847A (en) * 2011-03-01 2012-10-11 Minebea Co Ltd Rolling bearing, throttle valve device, and abs device
JP2013007492A (en) * 2012-10-11 2013-01-10 Nsk Ltd Rolling bearing
JP2016080020A (en) * 2014-10-14 2016-05-16 Nok株式会社 Sealing device
US20210355995A1 (en) * 2018-11-12 2021-11-18 Nok Corporation Sealing device and method for applying grease thereto
US11927218B2 (en) * 2018-11-12 2024-03-12 Nok Corporation Sealing device and method for applying grease thereto

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