JP2005069337A - Shell type roller bearing - Google Patents

Shell type roller bearing Download PDF

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JP2005069337A
JP2005069337A JP2003299005A JP2003299005A JP2005069337A JP 2005069337 A JP2005069337 A JP 2005069337A JP 2003299005 A JP2003299005 A JP 2003299005A JP 2003299005 A JP2003299005 A JP 2003299005A JP 2005069337 A JP2005069337 A JP 2005069337A
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seal
shell
roller bearing
inner diameter
outer ring
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JP4380263B2 (en
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Yutaka Shimoda
豊 下田
Yoshitaka Waseda
義孝 早稲田
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Koyo Seiko Co Ltd
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Koyo Seiko Co 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
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7809—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for needle roller bearings

Abstract

<P>PROBLEM TO BE SOLVED: To surely prevent the slipping-off of a roller and a seal. <P>SOLUTION: This shell-type roller bearing is composed of an outer ring 2, the needle roller 5, a cage 6 and the seal. The outer ring 2 has a cylindrical part 3, a flange part 7 and a seal mounting part 9 between the cylindrical part 3 and the flange part 7. The seal 8 is made out of only an elastic material (free from core metal) having the desired rigidity, an annular recessed part 11a is formed between an outer-diameter part 12 fitted to the seal mounting part 9 and an inner-diameter part 16 having two lips 15, and the seal is mounted on the seal mounting part 9 by utilizing the elastic deformation of the recessed part 11a and its restoration. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、シェル形ころ軸受に関する。   The present invention relates to a shell roller bearing.

シェル形ころ軸受では、シェル形の外輪と、外輪に組込まれる複数のころと、環状のシールとを備え、外輪は、内周面をころの軌道部とする円筒部と、この円筒部に軸方向内側に向けた鍔部と、円筒部と鍔部との間に形成されたシール装着部とを備えるものがある。このシェル形ころ軸受において、シール装着部にシールを装着するとき、芯金の無いシールをその弾性に抗して変形させて鍔部を乗越えさせ、シール装着部においてシールが弾性復元することにより、シールをシール装着部に装着している(例えば、特許文献１，２参照)。
特開２００２−８９５５０号 実公昭５１−２５６２３号 The shell-type roller bearing includes a shell-shaped outer ring, a plurality of rollers incorporated in the outer ring, and an annular seal. The outer ring has a cylindrical portion whose inner peripheral surface is a raceway portion of the roller, and a shaft that is connected to the cylindrical portion. Some include a flange portion directed inward in the direction, and a seal mounting portion formed between the cylindrical portion and the flange portion. In this shell-type roller bearing, when the seal is mounted on the seal mounting portion, the seal without the metal core is deformed against its elasticity to get over the collar portion, and the seal is elastically restored at the seal mounting portion, The seal is mounted on the seal mounting portion (see, for example, Patent Documents 1 and 2).
JP 2002-89550 A Shoko 51-25623

上記構造を備えたシェル形ころ軸受では、シールの弾性が高い（剛性が低い）と、ころやその保持器が軸方向に移動してシールに当たると、これらが軸受外に抜出すおそれがある一方、弾性が低い（剛性が高い）と、シールの装着作業がしにくい。   In shell roller bearings with the above structure, if the elasticity of the seal is high (low rigidity), if the roller or its cage moves in the axial direction and hits the seal, they may be pulled out of the bearing. If the elasticity is low (rigidity is high), it is difficult to install the seal.

本発明のシェル形ころ軸受は、シェル形の外輪と、この外輪に組込まれる複数のころと、環状のシールとを備え、外輪は、ころの軌道部が形成された円筒部と、この円筒部の軸方向一方側に設けられた鍔部と、円筒部と鍔部との間に形成されたシール装着部とを備え、シールは、所定の剛性を有する樹脂材から作られ、かつ、シール装着部に嵌合する外径部と、内周面にリップが形成された内径部と、外径部と内径部との間に形成されてシール装着部に対する外径部の嵌合に際してその縮径を許容する環状の凹部とを備えることを特徴とする。   A shell-type roller bearing of the present invention includes a shell-shaped outer ring, a plurality of rollers incorporated in the outer ring, and an annular seal, and the outer ring includes a cylindrical portion in which a roller raceway portion is formed, and the cylindrical portion. And a seal mounting portion formed between the cylindrical portion and the flange portion, the seal is made of a resin material having a predetermined rigidity, and the seal is mounted. An outer diameter portion that fits into the inner portion, an inner diameter portion that has a lip formed on the inner peripheral surface, and a reduced diameter of the outer diameter portion that is formed between the outer diameter portion and the inner diameter portion when the outer diameter portion is fitted to the seal mounting portion And an annular recess that permits the above.

上記構成において、シールを外輪のシール装着部に装着する際、環状の凹部を利用してシールの外径部を縮径させるよう変形させて鍔部をくぐらせることで、外径部が鍔部の内周部に摺動し、シールをさらに押込むことでシールがシール装着部に装着される。   In the above configuration, when the seal is mounted on the seal mounting portion of the outer ring, the outer diameter portion can be passed through the flange portion by deforming the outer diameter portion of the seal using the annular recess to reduce the diameter of the seal. The seal is mounted on the seal mounting portion by sliding on the inner peripheral portion and pushing the seal further.

装着後のシールは、その外径部の一方側が外輪の円筒部の端面に軸方向で当接して係止し、外径部の他方側が鍔部に軸方向で係止することでシール装着部に効果的に保持される。   After mounting the seal, one side of the outer diameter part is in contact with the end surface of the cylindrical part of the outer ring in the axial direction and locked, and the other side of the outer diameter part is locked in the axial direction in the flange part. Effectively retained.

シェル形ころ軸受の使用時に、例えばころあるいはころを保持する保持器が軸方向に移動して、その端面がシールに当たった場合でも、シールによって保持器、ころが外輪から抜出るのを効果的に防止する。   When using a shell roller bearing, for example, even if the roller or the cage that holds the roller moves in the axial direction and the end face hits the seal, it is effective for the cage and roller to be pulled out of the outer ring by the seal. To prevent.

本発明の好ましい実施態様として、シールが軸方向で対称形状に形成されることで、凹部およびリップがそれぞれ軸方向で対称に配置され、かつ、内径部のリップ間に潤滑油溜まりが形成されている。   As a preferred embodiment of the present invention, the seal is formed in a symmetrical shape in the axial direction, so that the recess and the lip are symmetrically arranged in the axial direction, and a lubricating oil reservoir is formed between the lips of the inner diameter portion. Yes.

この構成によれば、シールはその軸方向どちらからでも同様にシール装着部に装着することが可能であり、したがって装着時の方向性を考慮する必要がないので、生産性が向上する。   According to this configuration, the seal can be similarly mounted on the seal mounting portion from either of its axial directions, and therefore, there is no need to consider the directionality at the time of mounting, so that productivity is improved.

本発明のさらに好ましい実施態様として、シールの軸方向幅が、シールの外径から内径を減じた値の半分以上の幅に設定されている。   As a further preferred embodiment of the present invention, the axial width of the seal is set to a width equal to or more than half the value obtained by subtracting the inner diameter from the outer diameter of the seal.

上記構成によれば、シール装着時の安定性が良好となり、シェル形ころ軸受の使用時に、例えばころあるいはころを保持する保持器が軸方向に移動して、その端面がシールに当たった場合でも、シールによって保持器、ころが外輪から抜出るのをいっそう効果的に防止する。   According to the above configuration, the stability when the seal is mounted is good, and even when the shell-type roller bearing is used, for example, even when the roller or the cage that holds the roller moves in the axial direction and the end face hits the seal. The seal prevents the cage and rollers from being pulled out of the outer ring more effectively.

本発明のシェル形ころ軸受によれば、シール装着部へのシールの装着形態により、ころ等の軸方向への抜け出しを有効に防止できる。   According to the shell-type roller bearing of the present invention, it is possible to effectively prevent the rollers or the like from coming out in the axial direction by means of the seal mounting form on the seal mounting portion.

以下、本発明の実施形態に係るシェル形ころ軸受を、図面を参照して説明する。図１はシェル形ころ軸受の全体構成を示す断面図、図２は図１の拡大半断面図、図３はシールの拡大半断面図である。   Hereinafter, shell type roller bearings according to embodiments of the present invention will be described with reference to the drawings. 1 is a cross-sectional view showing the overall configuration of the shell roller bearing, FIG. 2 is an enlarged half sectional view of FIG. 1, and FIG. 3 is an enlarged half sectional view of a seal.

これらの図を参照して、シェル形ころ軸受１は、シェル形の外輪２と、複数の針状ころ５と、針状ころ５を円周方向等配位置に保持する保持器６と、環状のシール８とを備える。外輪２は、円筒部３と、鍔部７と、シール装着部９とにより構成される。   Referring to these drawings, a shell-type roller bearing 1 includes a shell-shaped outer ring 2, a plurality of needle rollers 5, a retainer 6 that holds the needle rollers 5 at circumferentially equidistant positions, an annular shape The seal 8 is provided. The outer ring 2 includes a cylindrical portion 3, a flange portion 7, and a seal mounting portion 9.

円筒部３の内周面は針状ころ５の外輪軌道部とされる。鍔部７は、円筒部３の軸方向外端側から軸方向内側に向けて傾斜している。シール装着部９は、円筒部３と鍔部７との間に配置されてその内周面にシール８が装着される。   An inner peripheral surface of the cylindrical portion 3 is an outer ring raceway portion of the needle roller 5. The flange portion 7 is inclined from the axially outer end side of the cylindrical portion 3 toward the axially inner side. The seal mounting portion 9 is disposed between the cylindrical portion 3 and the flange portion 7 and the seal 8 is mounted on the inner peripheral surface thereof.

円筒部３は有底形状に形成される。シール装着部９は、円筒部３の肉厚よりも薄い肉厚に、また、鍔部７は、シール装着部９の肉厚とほぼ等しい肉厚に、それぞれ、形成されている。   The cylindrical portion 3 is formed in a bottomed shape. The seal mounting portion 9 is formed to be thinner than the thickness of the cylindrical portion 3, and the flange portion 7 is formed to have a thickness substantially equal to the thickness of the seal mounting portion 9.

シール８はゴム等の剛性よりも大きい所要の剛性を有する弾性材好ましくは樹脂材料(ＰＯＭ，ＰＰ，ＰＵ等)により左右対称の形状に形成されている。シール８は、外径部(シール外径部)１２と内径部(シール内径部)１６とを含むとともに、これらシール外径部１２とシール内径部１６は接続部１９により一体に形成されている。   The seal 8 is formed in a symmetrical shape by an elastic material having a required rigidity larger than the rigidity of rubber or the like, preferably a resin material (POM, PP, PU, etc.). The seal 8 includes an outer diameter portion (seal outer diameter portion) 12 and an inner diameter portion (seal inner diameter portion) 16, and the seal outer diameter portion 12 and the seal inner diameter portion 16 are integrally formed by a connection portion 19. .

シール外径部１２の外周面は、筒状面１２ａと、筒状面１２ａの両側の円すい状面１２ｂ，１２ｃとから形成され、シール外径部１２の軸方向両側は、径方向に沿う環状面１２ｄ，１２ｅとされ、これによって、シール外径部１２は断面略台形に形成されている。   The outer peripheral surface of the seal outer diameter portion 12 is formed of a cylindrical surface 12a and conical surfaces 12b and 12c on both sides of the cylindrical surface 12a, and both axial sides of the seal outer diameter portion 12 are annular along the radial direction. The surfaces 12d and 12e are formed, and thereby the seal outer diameter portion 12 is formed in a substantially trapezoidal cross section.

シール外径部１２とシール内径部１６との間の軸方向両側に、環状の凹部１１ａ，１１ｂが形成されている。   On the both sides in the axial direction between the seal outer diameter portion 12 and the seal inner diameter portion 16, annular recesses 11a and 11b are formed.

シール内径部１６の軸方向両側に、環状の凹部１６ａ，１６ａが形成され、これら凹部１６ａ，１６ａを形成する周壁面１６ｂ，１６ｂは、径方向外方に向けて凸となる湾曲面に形成されている。   Annular recesses 16a and 16a are formed on both sides in the axial direction of the seal inner diameter part 16, and the peripheral wall surfaces 16b and 16b forming the recesses 16a and 16a are formed in curved surfaces that are convex outward in the radial direction. ing.

シール内径部１６の内周面の軸方向中間に、環状の凹部(潤滑油溜り)１７が形成され、一方の凹部１６ａと潤滑油溜り１７との間と、他方の凹部１６ａと潤滑油溜り１７との間とがそれぞれリップ１５，１５とされている。リップ１５，１５の内周面１５ａ，１５ａは、軸体１０の外周面に接触する軸方向に沿った平面に形成されて、軸受内外を密封する。   An annular recess (lubricant oil reservoir) 17 is formed in the middle of the inner peripheral surface of the seal inner diameter portion 16 in the axial direction, and between the one recess 16a and the lubricant reservoir 17 and between the other recess 16a and the lubricant reservoir 17. And lip 15 and 15 respectively. The inner peripheral surfaces 15a and 15a of the lips 15 and 15 are formed in a plane along the axial direction that is in contact with the outer peripheral surface of the shaft body 10, and seals the inside and outside of the bearing.

シール外径部１２の外径(シール８の外径)Ｄ１は、シール装着部９の内径Ｄ２に比べてわずかに大きく設定されている。シール外径部１２の内径Ｄ３は、円筒部３の内径Ｄ４とほぼ等しい大きさに形成されている。   The outer diameter (outer diameter of the seal 8) D1 of the seal outer diameter portion 12 is set slightly larger than the inner diameter D2 of the seal mounting portion 9. The inner diameter D3 of the seal outer diameter portion 12 is formed to be approximately equal to the inner diameter D4 of the cylindrical portion 3.

シール８の軸方向幅Ｂは、シール外径部１２の外径Ｄ１からシール内径部１６の内径Ｄ５を減じた値(径方向高さ)Ｈの１／２以上の大きさに設定されている。式で表せば、(Ｄ１−Ｄ５)／２＝Ｈ／２≦Ｂとなる。   The axial width B of the seal 8 is set to a size equal to or greater than ½ of a value (radial height) H obtained by subtracting the inner diameter D5 of the seal inner diameter portion 16 from the outer diameter D1 of the seal outer diameter portion 12. . Expressed by the equation, (D1−D5) / 2 = H / 2 ≦ B.

上記構成のシェル形ころ軸受１の製造に際して、外輪２は例えばＪＩＳ規格ＳＰＢ２Ｓ等の低炭素鋼をベースに有底円筒形状にプレス成型する。このとき外輪２の開口側は、内径を大きくすることで薄肉に形成しておく。次に開口側端部の薄肉部分を屈曲して内径Ｄ６を有する鍔部７を形成し、外輪２に浸炭焼入を行って硬化する。なお鍔部７の内径Ｄ６は、円筒部３の内径Ｄ４よりもわずかに小さく形成しておく。   When manufacturing the shell roller bearing 1 having the above-described configuration, the outer ring 2 is press-molded into a bottomed cylindrical shape based on a low carbon steel such as JIS standard SPB2S. At this time, the opening side of the outer ring 2 is formed thin by increasing the inner diameter. Next, the thin portion at the opening side end is bent to form a flange 7 having an inner diameter D6, and the outer ring 2 is hardened by carburizing and quenching. The inner diameter D6 of the flange portion 7 is formed slightly smaller than the inner diameter D4 of the cylindrical portion 3.

続いて、鍔部７を形成した外輪２の内部に、針状ころ５と保持器６との組品を装着する。この場合、鍔部７の内径Ｄ６は、円筒部３の内径Ｄ４よりもわずかに小さいので、前記組品、特に針状ころ５に損傷を与えることなく組込むことができる。この組品に続いて、シール８を外輪２のシール装着部９に装着する。   Subsequently, the assembly of the needle roller 5 and the cage 6 is mounted inside the outer ring 2 in which the flange portion 7 is formed. In this case, since the inner diameter D6 of the collar portion 7 is slightly smaller than the inner diameter D4 of the cylindrical portion 3, it can be assembled without damaging the assembly, particularly the needle roller 5. Following this assembly, the seal 8 is mounted on the seal mounting portion 9 of the outer ring 2.

ここで、シール８は、その外径Ｄ１が鍔部７の内径Ｄ６より大きく、かつ、所定の硬度を有している。しかし、シール８を外輪２のシール装着部９に装着する際は、凹部１１ａを利用してシール外径部１２を縮径させるよう変形させて鍔部７をくぐらせることで、シール外径部１２の円すい状面１２ｂ、筒状面１２ａ、円すい状面１２ｃが順に鍔部７の内周面に摺動し、シール８をさらに押込むことでシール８がシール装着部９に装着される。   Here, the outer diameter D1 of the seal 8 is larger than the inner diameter D6 of the flange portion 7, and has a predetermined hardness. However, when the seal 8 is mounted on the seal mounting portion 9 of the outer ring 2, the seal outer diameter portion is passed through the flange portion 7 by deforming the seal outer diameter portion 12 using the recess 11a so as to reduce the diameter. The 12 conical surface 12b, the cylindrical surface 12a, and the conical surface 12c slide in order on the inner peripheral surface of the flange portion 7, and the seal 8 is further pushed in, so that the seal 8 is mounted on the seal mounting portion 9.

そうすると、シール外径部１２の外径Ｄ１はシール装着部９の内径Ｄ２に比べてわずかに大きく設定されていることから、シール８の弾性復元力により、シール外径部１２の筒状面１２ａがシール装着部９の内周面に嵌着し、シール外径部１２における一方の環状面１２ｄが、円筒部３とシール装着部９との間の段付面２ａに軸方向で当接して係止し、他方の環状面１２ｅが鍔部７に軸方向で係止して、シール８はシール装着部９に確実に保持される。   Then, since the outer diameter D1 of the seal outer diameter portion 12 is set to be slightly larger than the inner diameter D2 of the seal mounting portion 9, the cylindrical surface 12a of the seal outer diameter portion 12 is caused by the elastic restoring force of the seal 8. Is fitted to the inner peripheral surface of the seal mounting portion 9, and one annular surface 12d of the seal outer diameter portion 12 is in contact with the stepped surface 2a between the cylindrical portion 3 and the seal mounting portion 9 in the axial direction. The other annular surface 12e is locked to the flange portion 7 in the axial direction, and the seal 8 is securely held by the seal mounting portion 9.

このように、シール８は所定の硬度を有した樹脂で形成していても、凹部１１ａを有しているので、装着の際にシール外径部１２の一方側が変形することでシール装着部９への装着が可能となる。装着後のシール８は、シール外径部１２の一方側の環状面１２ｄが段付面２ａに軸方向で当接して係止し、他方側の環状面１２ｅが鍔部７に軸方向で係止するので、シール８はシール装着部９に効果的に保持される。   Thus, even if the seal 8 is formed of a resin having a predetermined hardness, the seal 8 has the recess 11a. Therefore, when one side of the seal outer diameter portion 12 is deformed during mounting, the seal mounting portion 9 is deformed. It becomes possible to attach to. In the seal 8 after mounting, the annular surface 12d on one side of the seal outer diameter portion 12 is engaged with the stepped surface 2a in the axial direction and locked, and the annular surface 12e on the other side is engaged with the flange portion 7 in the axial direction. Since it stops, the seal 8 is effectively held by the seal mounting portion 9.

さらにシール８は軸方向に対称形状であるため、シール８の左右どちらからでも同様にシール装着部９に装着することができ、したがって装着時の方向性を考慮する必要がないので、生産性が向上する。   Furthermore, since the seal 8 has a symmetrical shape in the axial direction, it can be similarly mounted on the seal mounting portion 9 from either the left or right side of the seal 8, and therefore there is no need to consider the directionality at the time of mounting. improves.

シール８の軸方向幅Ｂは、上記径方向高Ｈさの半分以上の幅に設定されているので、装着時の安定性が良好となり、シェル形ころ軸受１の使用時に仮に保持器６が軸方向に移動して、その端面６ａがシール内径部１６の側面３０に当たった場合でも、シール８によって保持器６，針状ころ５が外輪２から抜出るのを効果的に防止することができる。   Since the axial width B of the seal 8 is set to a width that is half or more of the radial height H, the stability during mounting is improved, and the cage 6 is temporarily connected to the shaft when the shell roller bearing 1 is used. The retainer 6 and the needle rollers 5 can be effectively prevented from being pulled out of the outer ring 2 by the seal 8 even when the end surface 6a contacts the side surface 30 of the seal inner diameter portion 16 by moving in the direction. .

図４に別の実施形態を示す。図１ないし図３で示したシェル形ころ軸受１と異なる部分は、シール８の形状である。図４のシール８は軸方向非対称形状に形成されており、所定の剛性を有する樹脂材料のみから形成されている。   FIG. 4 shows another embodiment. A portion different from the shell-type roller bearing 1 shown in FIGS. 1 to 3 is the shape of the seal 8. The seal 8 in FIG. 4 is formed in an axially asymmetric shape, and is formed only from a resin material having a predetermined rigidity.

シール８は、シール装着部９に内嵌するシール外径部１２と、このシール外径部１２に連続部１９を介して配置されたシール内径部１６とから一体に形成されている。   The seal 8 is integrally formed from a seal outer diameter portion 12 fitted into the seal mounting portion 9 and a seal inner diameter portion 16 disposed on the seal outer diameter portion 12 via a continuous portion 19.

シール外径部１２の外周面は、軸方向一方側領域の円すい状面１２ｂと、軸方向他方側領域の筒状面１２ａとから形成され、嵌合部１２の軸方向両側が径方向に沿う環状面１２ｄ，１２ｅとされている。   The outer peripheral surface of the seal outer diameter portion 12 is formed by a conical surface 12b in one axial region and a cylindrical surface 12a in the other axial region, and both axial sides of the fitting portion 12 are along the radial direction. The annular surfaces 12d and 12e are used.

シール内径部１６の径方向内方の軸方向両側領域に、環状の凹部１６ｃ，１６ｄが形成され、凹部１６ｃを形成する周壁面１６ｅは、径方向外方に向けて凸となる湾曲面に形成され、凹部１６ｄを形成する周壁面１６ｆは径方向内方に向けて凸となる湾曲面に形成されている。   Annular recesses 16c and 16d are formed on both axially inner side regions of the seal inner diameter part 16, and the peripheral wall surface 16e forming the recess 16c is formed on a curved surface that protrudes radially outward. The peripheral wall surface 16f forming the recess 16d is formed in a curved surface that is convex inward in the radial direction.

凹部１６ｃ，１６ｄ間がリップ１５とされ、このリップ１５の内周面１５ａは、軸体１０の外周面に接触する軸方向に沿った平面に形成されている。   A lip 15 is formed between the recesses 16 c and 16 d, and an inner peripheral surface 15 a of the lip 15 is formed in a plane along the axial direction that contacts the outer peripheral surface of the shaft body 10.

シール８の外径Ｄ１は、未装着状態でシール装着部９の内径Ｄ２に比べてわずかに大きく設定されている。シール外径部１２の内径Ｄ３は、円筒部３の内径Ｄ４とほぼ等しい大きさに形成されている。   The outer diameter D1 of the seal 8 is set to be slightly larger than the inner diameter D2 of the seal mounting portion 9 in the unmounted state. The inner diameter D3 of the seal outer diameter portion 12 is formed to be approximately equal to the inner diameter D4 of the cylindrical portion 3.

シール８の軸方向幅Ｂは、シール８の外径Ｄ１から内径Ｄ５を減じた径方向高Ｈさの半分以上の幅に設定されている。   The axial width B of the seal 8 is set to a width equal to or more than half of the radial height H obtained by subtracting the inner diameter D5 from the outer diameter D1 of the seal 8.

シール８の径方向中間部に、軸方向内側にくぼむ環状の凹部１１ａ，１１ｂが形成されている。   In the radial intermediate portion of the seal 8, annular recesses 11 a and 11 b that are recessed inward in the axial direction are formed.

上記構成において、シール８をシール装着部９に装着する際、凹部１１ａを利用してシール外径部１２を縮径させるよう変形させて鍔部７をくぐらせることで、シール外径部１２の円すい状面１２ｂ、筒状面１２ａが順に鍔部７の内周部に摺動し、シール８をさらに押込むことでシール８がシール装着部９に装着される。このように、シール８は所定の硬度を有した樹脂で形成していても、凹部１１ａを有しているので、シール装着部９への装着が可能となる。   In the above configuration, when the seal 8 is mounted on the seal mounting portion 9, the seal outer diameter portion 12 is deformed so as to reduce the diameter by using the concave portion 11a, and the flange portion 7 is passed through. The conical surface 12b and the cylindrical surface 12a sequentially slide on the inner peripheral portion of the flange portion 7, and the seal 8 is further pushed in, so that the seal 8 is mounted on the seal mounting portion 9. Thus, even if the seal 8 is formed of a resin having a predetermined hardness, the seal 8 has the recess 11a, so that the seal 8 can be attached to the seal attachment portion 9.

シール８の外径Ｄ１はシール装着部９の内径Ｄ２に比べてわずかに大きく設定されていることから、装着後において、シール８の弾性によりシール外径部１２の筒状面１２ａがシール装着部９の内周面に嵌着し、シール８の環状面１２ｄが段付面２ａに軸方向で当接して係止し、シール外径部１２の環状面１２ｅが鍔部７に軸方向で係止してシール装着部９に確実に保持される。   Since the outer diameter D1 of the seal 8 is set to be slightly larger than the inner diameter D2 of the seal mounting portion 9, the cylindrical surface 12a of the seal outer diameter portion 12 is formed by the elasticity of the seal 8 after mounting. 9, the annular surface 12 d of the seal 8 abuts and locks with the stepped surface 2 a in the axial direction, and the annular surface 12 e of the seal outer diameter portion 12 engages with the flange portion 7 in the axial direction. And is securely held by the seal mounting portion 9.

シール８の軸方向幅Ｂは、外径Ｄ１から内径Ｄ５を減じた径方向高Ｈさに比べて大きく設定されているので、装着時の安定性が良好となり、シェル形ころ軸受１の使用時に仮に保持器６の端面６ａが軸方向に移動してシール８のシール内径部１６の側面３０に当たった場合でも、シール８によって保持器６，針状ころ５が外輪２から抜出るのを効果的に防止することができる。   The axial width B of the seal 8 is set to be larger than the radial height H obtained by subtracting the inner diameter D5 from the outer diameter D1, so that the stability at the time of mounting is improved and the shell-type roller bearing 1 is used. Even if the end surface 6 a of the cage 6 moves in the axial direction and hits the side surface 30 of the seal inner diameter portion 16 of the seal 8, it is effective that the cage 6 and the needle rollers 5 are pulled out from the outer ring 2 by the seal 8. Can be prevented.

本発明の実施形態に係るシェル形ころ軸受の全体構成を示す断面図Sectional drawing which shows the whole structure of the shell type roller bearing which concerns on embodiment of this invention 図１の拡大半断面図An enlarged half sectional view of FIG. 図１におけるシールの単体拡大半断面図Single enlarged half sectional view of the seal in FIG. 本発明の他の実施形態のシールの単体拡大半断面図Single expanded half sectional view of a seal of another embodiment of the present invention

符号の説明Explanation of symbols

１ シェル形ころ軸受
２ 外輪
５ 針状ころ
６ 保持器
７ 鍔部
８ シール
９ シール装着部
１２ シール外径部
１９ 接続部
１５ リップ
１６ シール内径部
１７ 潤滑油溜り DESCRIPTION OF SYMBOLS 1 Shell type roller bearing 2 Outer ring 5 Needle roller 6 Cage 7 Cage part 8 Seal 8 Seal mounting part 12 Seal outer diameter part 19 Connection part 15 Lip 16 Seal inner diameter part 17 Lubricant oil reservoir

Claims (3)

シェル形の外輪と、この外輪に組込まれる複数のころと、環状のシールとを備え、外輪は、ころの軌道部が形成された円筒部と、この円筒部の軸方向一方側に設けられた鍔部と、円筒部と鍔部との間に形成されたシール装着部とを備えたシェル形ころ軸受であって、
シールは、所定の剛性を有する樹脂材から作られ、かつ、シール装着部に嵌合する外径部と、内周面にリップが形成された内径部と、外径部と内径部との間に形成されてシール装着部に対する外径部の嵌合に際してその縮径を許容する環状の凹部とを備える、ことを特徴とするシェル形ころ軸受。 The outer ring is provided with a shell-shaped outer ring, a plurality of rollers incorporated in the outer ring, and an annular seal, and the outer ring is provided on a cylindrical portion on which a roller raceway portion is formed and on one side in the axial direction of the cylindrical portion. A shell-type roller bearing provided with a flange portion and a seal mounting portion formed between the cylindrical portion and the flange portion,
The seal is made of a resin material having a predetermined rigidity and is fitted with the seal mounting portion, an inner diameter portion having a lip formed on the inner peripheral surface, and between the outer diameter portion and the inner diameter portion. A shell-type roller bearing, comprising: an annular recess that allows the outer diameter portion to be fitted into the seal mounting portion and allows the diameter to be reduced. シールが軸方向で対称形状に形成されることで、凹部およびリップがそれぞれ軸方向で対称に配置され、かつ、内径部のリップ間に潤滑油溜まりが形成されている、ことを特徴とする請求項１に記載のシェル形ころ軸受。 The seal is formed in a symmetrical shape in the axial direction, so that the recess and the lip are symmetrically arranged in the axial direction, and a lubricating oil reservoir is formed between the lips of the inner diameter portion. Item 2. A shell-type roller bearing according to item 1. シールは、当該シールの外径から内径を減じた値の半分以上の軸方向幅を有する、ことを特徴とする請求項１または２に記載のシェル形ころ軸受。 The shell-type roller bearing according to claim 1 or 2, wherein the seal has an axial width that is at least half of a value obtained by subtracting the inner diameter from the outer diameter of the seal.
JP2003299005A 2003-08-22 2003-08-22 Shell roller bearing Expired - Fee Related JP4380263B2 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011158031A (en) * 2010-02-01 2011-08-18 Jtekt Corp Needle roller bearing
US20120207421A1 (en) * 2010-09-27 2012-08-16 Nsk Ltd. Outer ring for a shell-type radial needle bearing and manufacturing method thereof
WO2014131466A1 (en) * 2013-03-01 2014-09-04 Schaeffler Technologies AG & Co. KG Bearing arrangement for a shaft having a seal acting on both sides
CN104061327A (en) * 2014-05-28 2014-09-24 史建伟 Oil seal and bearing comprising same
CN105782248A (en) * 2015-12-23 2016-07-20 江苏南方轴承股份有限公司 Oil seal and bearing including oil seal
CN107532644A (en) * 2015-04-27 2018-01-02 舍弗勒技术股份两合公司 For supporting the needle bearing unit and gas governor valve device of curtain shaft or actuator axle
JP2018002148A (en) * 2017-09-08 2018-01-11 Ntn株式会社 Bearing device for wheel

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011158031A (en) * 2010-02-01 2011-08-18 Jtekt Corp Needle roller bearing
US20120207421A1 (en) * 2010-09-27 2012-08-16 Nsk Ltd. Outer ring for a shell-type radial needle bearing and manufacturing method thereof
US8834034B2 (en) * 2010-09-27 2014-09-16 Nsk Ltd. Outer ring for a shell-type radial needle bearing and manufacturing method thereof
US9314833B2 (en) 2010-09-27 2016-04-19 Nsk Ltd. Outer ring for a shell-type radial needle bearing and manufacturing method thereof
USRE47828E1 (en) * 2010-09-27 2020-01-28 Nsk Ltd. Outer ring for a shell-type radial needle bearing and manufacturing method thereof
WO2014131466A1 (en) * 2013-03-01 2014-09-04 Schaeffler Technologies AG & Co. KG Bearing arrangement for a shaft having a seal acting on both sides
CN104061327A (en) * 2014-05-28 2014-09-24 史建伟 Oil seal and bearing comprising same
CN107532644A (en) * 2015-04-27 2018-01-02 舍弗勒技术股份两合公司 For supporting the needle bearing unit and gas governor valve device of curtain shaft or actuator axle
CN105782248A (en) * 2015-12-23 2016-07-20 江苏南方轴承股份有限公司 Oil seal and bearing including oil seal
JP2018002148A (en) * 2017-09-08 2018-01-11 Ntn株式会社 Bearing device for wheel

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