JP2021110357A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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JP2021110357A
JP2021110357A JP2020001376A JP2020001376A JP2021110357A JP 2021110357 A JP2021110357 A JP 2021110357A JP 2020001376 A JP2020001376 A JP 2020001376A JP 2020001376 A JP2020001376 A JP 2020001376A JP 2021110357 A JP2021110357 A JP 2021110357A
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grease
holding groove
rolling bearing
inner ring
grease holding
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雅之 佐藤
Masayuki Sato
雅之 佐藤
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NSK Ltd
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  • Rolling Contact Bearings (AREA)

Abstract

To provide a rolling bearing that can prevent a foreign matter from flowing into the rolling bearing from the outside and be used at high-speed rotation.SOLUTION: A rolling bearing 1 includes: a grease holding groove 8 for holding filled grease G which is formed in an axial end of an inner ring 3; and an inner peripheral-side end part of a sealing device which is arranged while entering the grease holding groove 8 in a non-contact manner, and coming into contact with the grease G held in the grease holding groove 8.SELECTED DRAWING: Figure 1

Description

本発明は、転がり軸受に関し、より詳細には、内輪回転で使用される転がり軸受に関する。 The present invention relates to rolling bearings, and more particularly to rolling bearings used for inner ring rotation.

従来の転がり軸受として、軸受外部からの異物の侵入や、軸受内部からのグリースやオイルの漏れを防止すべく、接触シールを用いることが知られている（例えば、特許文献１及び２参照）。特許文献１に記載の転がり軸受では、内輪に設けたシール接触溝にグリースを充填させておくことで、シール接触溝に接触する接触シールが、該グリースと接触する。これにより、接触シールとシール接触溝との接触状態を安定させ、接触シールとシール溝とのスリップによる自励振動の防止、及びこれに伴う鳴き音の発生を防止している。 As a conventional rolling bearing, it is known to use a contact seal in order to prevent foreign matter from entering from the outside of the bearing and leakage of grease or oil from the inside of the bearing (see, for example, Patent Documents 1 and 2). In the rolling bearing described in Patent Document 1, by filling the seal contact groove provided in the inner ring with grease, the contact seal in contact with the seal contact groove comes into contact with the grease. This stabilizes the contact state between the contact seal and the seal contact groove, prevents self-excited vibration due to slip between the contact seal and the seal groove, and prevents the generation of squealing noise.

特開２００５−８３４２１号公報Japanese Unexamined Patent Publication No. 2005-83421 特開２００５−３２１０６８号公報Japanese Unexamined Patent Publication No. 2005-321608

ところで、特許文献１に記載の転がり軸受では、内輪回転で使用すると、遠心力でグリースが漏れてしまう可能性があり、また、接触シールであるため、高速回転での使用が困難となる場合があった。 By the way, in the rolling bearing described in Patent Document 1, when it is used in the inner ring rotation, grease may leak due to centrifugal force, and since it is a contact seal, it may be difficult to use it in high speed rotation. there were.

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、外部からの異物の流入を防止でき、高速回転での使用が可能な転がり軸受を提供する。 The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a rolling bearing that can prevent the inflow of foreign matter from the outside and can be used at high speed rotation.

本発明の上記目的は、下記の構成により達成される。
（１） 内周面に外輪軌道面を有する外輪と、
外周面に内輪軌道面を有する内輪と、
前記外輪軌道面及び前記内輪軌道面間に配置された複数の玉と、
前記外輪の軸方向端部に取り付けられる円輪状の密封装置と、
を備える転がり軸受であって、
前記内輪の軸方向端部には、充填されたグリースを保持するグリース保持溝が形成され、
前記密封装置の内周側端部は、前記グリース保持溝内に入り込んで非接触に配置され、且つ、前記グリース保持溝に保持された前記グリースと接触している、転がり軸受。
（２） 前記密封装置は、シールド部材または、芯金に弾性部材が一体に固着されたシール部材により構成され、
前記グリース保持溝は、軸方向端面側から軸方向に凹んだ環状凹部である、（１）に記載の転がり軸受。
（３） 前記グリース保持溝の内周面には、前記グリース保持溝の開口部において半径方向内方に延出する堰形成部材が圧入されている、（２）に記載の転がり軸受。
（４） 前記密封装置は、前記シール部材により構成され、
前記内輪のグリース保持溝は、外周面に前記内輪の軸方向端面まで傾斜して延び、前記密封装置の内径側端部の軸方向端面と対向する傾斜部を有する、（２）又は（３）に記載の転がり軸受。 The above object of the present invention is achieved by the following configuration.
(1) An outer ring having an outer ring raceway surface on the inner peripheral surface,
An inner ring having an inner ring raceway surface on the outer peripheral surface,
A plurality of balls arranged between the outer ring raceway surface and the inner ring raceway surface, and
An annular sealing device attached to the axial end of the outer ring,
It is a rolling bearing equipped with
A grease holding groove for holding the filled grease is formed at the axial end of the inner ring.
A rolling bearing in which the inner peripheral end portion of the sealing device enters the grease holding groove and is arranged in a non-contact manner, and is in contact with the grease held in the grease holding groove.
(2) The sealing device is composed of a shield member or a sealing member in which an elastic member is integrally fixed to a core metal.
The rolling bearing according to (1), wherein the grease holding groove is an annular recess recessed in the axial direction from the end face side in the axial direction.
(3) The rolling bearing according to (2), wherein a weir forming member extending inward in the radial direction is press-fitted onto the inner peripheral surface of the grease holding groove.
(4) The sealing device is composed of the sealing member.
The grease holding groove of the inner ring extends on the outer peripheral surface so as to be inclined to the axial end surface of the inner ring, and has an inclined portion facing the axial end surface of the inner diameter side end portion of the sealing device (2) or (3). Rolling bearings described in.

本発明の転がり軸受によれば、密封装置の内周側端部は、内輪のグリース保持溝に保持されたグリースと接触しているので、外部からの異物の流入を防止でき、また、密封装置の内周側端部は、グリース保持溝と接触しないので、高速回転での使用が可能である。 According to the rolling bearing of the present invention, the inner peripheral end of the sealing device is in contact with the grease held in the grease holding groove of the inner ring, so that foreign matter can be prevented from flowing in from the outside, and the sealing device can be prevented from flowing in. Since the inner peripheral end of the wheel does not come into contact with the grease holding groove, it can be used at high speed rotation.

本発明の第１実施形態に係る転がり軸受の断面図である。It is sectional drawing of the rolling bearing which concerns on 1st Embodiment of this invention. 本発明の第１実施形態の変形例に係る転がり軸受の半断面図である。It is a half cross-sectional view of the rolling bearing which concerns on the modification of 1st Embodiment of this invention. 本発明の第２実施形態に係る転がり軸受の半断面図である。It is a half cross-sectional view of the rolling bearing which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態の第１変形例に係る転がり軸受の半断面図である。It is a half cross-sectional view of the rolling bearing which concerns on 1st modification of 2nd Embodiment of this invention. （ａ）は、本発明の第２実施形態の第２変形例に係る転がり軸受の要部断面図であり、（ｂ）は、本発明の第３変形例に係る転がり軸受の要部断面図である。(A) is a cross-sectional view of a main part of a rolling bearing according to a second modification of the second embodiment of the present invention, and (b) is a cross-sectional view of a main part of a rolling bearing according to a third modification of the present invention. Is.

以下、本発明の各実施形態に係る転がり軸受について、図面に基づいて詳細に説明する。 Hereinafter, rolling bearings according to each embodiment of the present invention will be described in detail with reference to the drawings.

［第１実施形態］
図１に示すように、本発明の第１実施形態に係る深溝玉軸受１は、内周面に外輪軌道面（外輪軌道溝）２ａを有する外輪２と、外周面に内輪軌道面（内輪軌道溝）３ａを有する内輪３と、外輪２及び内輪３の両軌道面２ａ、３ａ間に配置された複数の玉（転動体）６と、複数の玉６を円周方向に所定の間隔で保持する冠型保持器７と、外輪２の軸方向両端部に形成された取付溝２ｂ、２ｂに配置される円輪状で、一対のシールド部材（密封装置）２０、２０と、を備え、軸受内部にグリースＧが封入された状態で使用される。 [First Embodiment]
As shown in FIG. 1, the deep groove ball bearing 1 according to the first embodiment of the present invention has an outer ring 2 having an outer ring raceway surface (outer ring raceway groove) 2a on the inner peripheral surface and an inner ring raceway surface (inner ring raceway) on the outer peripheral surface. The inner ring 3 having the groove) 3a, the plurality of balls (rolling bodies) 6 arranged between the raceway surfaces 2a and 3a of the outer ring 2 and the inner ring 3, and the plurality of balls 6 are held at predetermined intervals in the circumferential direction. A pair of ring-shaped shield members (sealing devices) 20 and 20 arranged in mounting grooves 2b and 2b formed at both ends of the outer ring 2 in the axial direction are provided, and the inside of the bearing is provided. It is used in a state where the grease G is sealed in the bearing.

シールド部材２０は、金属製で、外輪２の内周面と内輪３の外周面との間を塞いでいる。シールド部材２０は、外輪２の内周面に形成された取付溝２ｂ、２ｂに固定された固定部２０ａと、該固定部２０ａから径方向内側に向かうにつれて軸方向外側に延びる傾斜部２０ｂと、該傾斜部２０ｂから径方向内側に延びる円板部２０ｃと、該円板部２０ｃから軸方向内側に折り曲げられ、先端部が内輪３のグリース保持溝８内に入り込んで非接触で近接配置される円筒部２０ｄと、を備える。 The shield member 20 is made of metal and closes between the inner peripheral surface of the outer ring 2 and the outer peripheral surface of the inner ring 3. The shield member 20 includes a fixing portion 20a fixed to a mounting groove 2b and 2b formed on the inner peripheral surface of the outer ring 2, and an inclined portion 20b extending axially outward from the fixing portion 20a toward the inside in the radial direction. The disc portion 20c extending radially inward from the inclined portion 20b and the disc portion 20c are bent inward in the axial direction from the disc portion 20c, and the tip portion enters the grease holding groove 8 of the inner ring 3 and is arranged close to each other in a non-contact manner. A cylindrical portion 20d and the like are provided.

内輪３の軸方向端部、即ち、内輪３の肩部３ｂに形成されるグリース保持溝８は、軸方向端面側から軸方向に凹んだ環状凹部である。具体的に、グリース保持溝８は、円筒状の内周面８ａ及び円筒状の外周面８ｂと、これらを繋ぐ底面８ｃとによって構成され、軸方向外側に向けて開口している。そして、このグリース保持溝８には、充填されたグリースＧが保持されている。したがって、グリース保持溝８は、内輪回転により遠心力が発生してもグリースＧを保持できる十分な軸方向長さの内周面８ａを有するように形成される。 The axial end portion of the inner ring 3, that is, the grease holding groove 8 formed in the shoulder portion 3b of the inner ring 3, is an annular recess recessed in the axial direction from the axial end face side. Specifically, the grease holding groove 8 is composed of a cylindrical inner peripheral surface 8a, a cylindrical outer peripheral surface 8b, and a bottom surface 8c connecting them, and is opened outward in the axial direction. Then, the filled grease G is held in the grease holding groove 8. Therefore, the grease holding groove 8 is formed so as to have an inner peripheral surface 8a having a sufficient axial length so that the grease G can be held even if a centrifugal force is generated due to the rotation of the inner ring.

なお、本実施形態では、グリース保持溝８の外周面８ｂは、内輪３の軸方向端面３ｃまで連続しており、グリース保持溝８の内周面８ａと肩部３ｂの外周面とを繋ぐ、肩部３ｂの軸方向端面３ｄは、内輪３の軸方向端面３ｃより軸方向内側に位置している。 In the present embodiment, the outer peripheral surface 8b of the grease holding groove 8 is continuous up to the axial end surface 3c of the inner ring 3, and connects the inner peripheral surface 8a of the grease holding groove 8 and the outer peripheral surface of the shoulder portion 3b. The axial end surface 3d of the shoulder portion 3b is located axially inside the axial end surface 3c of the inner ring 3.

これにより、シールド部材２０の内周側端部である円筒部２０ｄが、グリース保持溝８内に入り込み、グリース保持溝８とシールド部材２０とでラビリンス隙間を形成する。また、グリース保持溝８に保持されたグリースＧは、グリース保持溝８とシールド部材２０の両方に接触して、ラビリンス隙間の一部を塞ぐ形になるので、シールド部材２０は、非接触でありながら、外部からの異物の流入を確実に防止できる。また、グリース保持溝８は軸方向に凹んだ環状凹部であるので、内輪回転により遠心力が発生してもグリースＧが漏れるのを抑制できる。さらに、シールド部材２０は、内輪３と非接触であるので、高速回転での使用が可能となる。 As a result, the cylindrical portion 20d, which is the inner peripheral end of the shield member 20, enters the grease holding groove 8 and forms a labyrinth gap between the grease holding groove 8 and the shield member 20. Further, the grease G held in the grease holding groove 8 comes into contact with both the grease holding groove 8 and the shield member 20 to close a part of the labyrinth gap, so that the shield member 20 is non-contact. However, the inflow of foreign matter from the outside can be reliably prevented. Further, since the grease holding groove 8 is an annular recess recessed in the axial direction, it is possible to prevent the grease G from leaking even if centrifugal force is generated due to the rotation of the inner ring. Further, since the shield member 20 is not in contact with the inner ring 3, it can be used at high speed rotation.

なお、図２に示す変形例の転がり軸受１ａでは、グリース保持溝８の内周面８ａには、軸方向外側から円環状の堰形成部材２５が圧入されている。
堰形成部材２５は、円筒面２５ａの一端部を内周側に湾曲させ、円板部２５ｂとの接続部分が、断面Ｖ字状に形成されている。堰形成部材２５は、円筒面２５ａをグリース保持溝８の内周面８ａに圧入させ、円板部２５ｂが肩部３ｂの軸方向端面３ｄと当接することでグリース保持溝８に軸方向に位置決めされている。
したがって、内輪回転により遠心力が発生しても、グリース保持溝８の開口部において半径方向内方に延出する堰形成部材２５によって、グリースＧが漏れるのをより確実に抑制できる。 In the rolling bearing 1a of the modified example shown in FIG. 2, an annular weir forming member 25 is press-fitted into the inner peripheral surface 8a of the grease holding groove 8 from the outside in the axial direction.
In the weir forming member 25, one end of the cylindrical surface 25a is curved inward, and the connecting portion with the disk portion 25b is formed in a V-shaped cross section. The weir forming member 25 press-fits the cylindrical surface 25a into the inner peripheral surface 8a of the grease holding groove 8, and the disk portion 25b comes into contact with the axial end surface 3d of the shoulder portion 3b, thereby positioning the weir forming member 25 in the grease holding groove 8 in the axial direction. Has been done.
Therefore, even if a centrifugal force is generated due to the rotation of the inner ring, the weir forming member 25 extending inward in the radial direction at the opening of the grease holding groove 8 can more reliably suppress the leakage of the grease G.

［第２実施形態］
次に、図３を参照して、本発明の第２実施形態に係る深溝玉軸受１ｂについて説明する。なお、第１実施形態と同一又は同等部分については、第１実施形態のものと同一符号を付して、説明を省略或いは簡略化する。 [Second Embodiment]
Next, the deep groove ball bearing 1b according to the second embodiment of the present invention will be described with reference to FIG. The same or equivalent parts as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and the description thereof will be omitted or simplified.

第１実施形態では、密封装置をシールド部材２０で構成していたが、本実施形態では、密封装置をシール部材３０によって構成している。
シール部材３０は、環状の芯金３１と、該芯金３１に蒸着により一体に固着されるゴム材料などの弾性部材３２とを備える。シール部材３０は、取付溝２ｂに嵌合される嵌合部３０ａと、嵌合部３０ａから径方向内側に延びる円板部３０ｂと、円板部３０ｂよりも径方向内側で、内輪３に形成されたグリース保持溝８と共にラビリンス隙間を形成する非接触リップ３０ｃ、３０ｄと、を備える。なお、芯金３１は、嵌合部３０ａから円板部３０ｂに掛けて設けられ、円板部３０ｂの内側を除いて、弾性部材３２によって覆われている。 In the first embodiment, the sealing device is composed of the shield member 20, but in the present embodiment, the sealing device is composed of the sealing member 30.
The seal member 30 includes an annular core metal 31 and an elastic member 32 such as a rubber material that is integrally fixed to the core metal 31 by vapor deposition. The seal member 30 is formed on the inner ring 3 with a fitting portion 30a fitted in the mounting groove 2b, a disc portion 30b extending radially inward from the fitting portion 30a, and a disc portion 30b radially inside the disc portion 30b. The non-contact lips 30c and 30d that form a labyrinth gap together with the grease holding groove 8 provided are provided. The core metal 31 is provided so as to hang from the fitting portion 30a to the disc portion 30b, and is covered with the elastic member 32 except for the inside of the disc portion 30b.

また、本実施形態においても、内輪３の肩部３ｂに形成されるグリース保持溝８は、軸方向端面側から軸方向に凹んだ環状凹部であり、また、シール部材３０の内周側端部となる、非接触リップ３０ｃは、グリース保持溝８内に入り込んで非接触で配置され、且つ、グリース保持溝８に保持されたグリースＧと接触している。この場合、グリース保持溝８は、シールド部材３０の非接触リップ３０ｃを囲うため、第１実施形態に比べて大きな径方向寸法を有しており、外周面８ｂと底面８ｃとは湾曲して接続されている。 Further, also in the present embodiment, the grease holding groove 8 formed in the shoulder portion 3b of the inner ring 3 is an annular recess recessed in the axial direction from the end surface side in the axial direction, and the end portion on the inner peripheral side of the seal member 30. The non-contact lip 30c is arranged in the grease holding groove 8 in a non-contact manner, and is in contact with the grease G held in the grease holding groove 8. In this case, since the grease holding groove 8 surrounds the non-contact lip 30c of the shield member 30, it has a larger radial dimension than that of the first embodiment, and the outer peripheral surface 8b and the bottom surface 8c are curved and connected. Has been done.

この場合も、シール部材３０の非接触リップ３０ｃが、グリース保持溝８内に入り込み、グリース保持溝８とシール部材３０とでラビリンス隙間を形成する。また、グリース保持溝８に保持されたグリースＧは、グリース保持溝８とシール部材３０の両方に接触して、ラビリンス隙間の一部を塞ぐ形になるので、シール部材３０は、非接触でありながら、外部からの異物の流入を確実に防止できる。また、グリース保持溝８は軸方向に凹んだ環状凹部であるので、内輪回転により遠心力が発生してもグリースＧが漏れるのを抑制できる。さらに、シール部材３０は、内輪３と非接触であるので、高速回転での使用が可能となる。 Also in this case, the non-contact lip 30c of the seal member 30 enters the grease holding groove 8 and forms a labyrinth gap between the grease holding groove 8 and the seal member 30. Further, the grease G held in the grease holding groove 8 comes into contact with both the grease holding groove 8 and the sealing member 30 to close a part of the labyrinth gap, so that the sealing member 30 is non-contact. However, the inflow of foreign matter from the outside can be reliably prevented. Further, since the grease holding groove 8 is an annular recess recessed in the axial direction, it is possible to prevent the grease G from leaking even if centrifugal force is generated due to the rotation of the inner ring. Further, since the seal member 30 is not in contact with the inner ring 3, it can be used at high speed rotation.

また、本実施形態では、シール部材３０が他の非接触リップ３０ｄを有するので、ラビリンス隙間が、非接触リップ３０ｃとグリース保持溝８との間だけでなく、他の非接触リップ３０ｄと内輪３の肩部３ｂの軸方向端面３ｄ及び外周面との間まで形成される。これにより、外部からの異物の流入をより確実に防止でき、遠心力によるグリースＧの漏れをより防止できる。 Further, in the present embodiment, since the sealing member 30 has another non-contact lip 30d, the labyrinth gap is not only between the non-contact lip 30c and the grease holding groove 8, but also between the other non-contact lip 30d and the inner ring 3. It is formed up to between the axial end surface 3d and the outer peripheral surface of the shoulder portion 3b. As a result, the inflow of foreign matter from the outside can be prevented more reliably, and the leakage of grease G due to centrifugal force can be further prevented.

なお、図４に示す変形例の転がり軸受１ｃのように、本実施形態においても、グリース保持溝８の内周面８ａには、円環状の堰形成部材２５が軸方向外側から圧入されている。この場合も、内輪回転により遠心力が発生しても、グリース保持溝８の開口部において半径方向内方に延出する堰形成部材２５によって、グリースＧが漏れるのをより確実に抑制できる。 As in the rolling bearing 1c of the modified example shown in FIG. 4, in the present embodiment as well, the annular weir forming member 25 is press-fitted into the inner peripheral surface 8a of the grease holding groove 8 from the outside in the axial direction. .. In this case as well, even if centrifugal force is generated due to the rotation of the inner ring, the leak of grease G can be more reliably suppressed by the weir forming member 25 extending inward in the radial direction at the opening of the grease holding groove 8.

また、図５（ａ）及び図５（ｂ）に示す変形例の転がり軸受１ｄ、１ｄのように、グリース保持溝８は、外周面８ｂに内輪３の軸方向端面３ｃまで傾斜して延び、シール部材３０の内径側端部の軸方向端面３０ｅと対向する傾斜部８ｄを有する構成としてもよい。これにより、内輪３の軸方向端面３ｃの肉厚（径方向寸法）を厚くすることができる。 Further, as in the rolling bearings 1d and 1d of the modified examples shown in FIGS. 5A and 5B, the grease holding groove 8 extends on the outer peripheral surface 8b so as to be inclined to the axial end surface 3c of the inner ring 3. The seal member 30 may have an inclined portion 8d facing the axial end surface 30e of the inner diameter side end portion. Thereby, the wall thickness (diametrical dimension) of the axial end surface 3c of the inner ring 3 can be increased.

内輪３の軸方向端面３ｃは、内輪３が嵌合するシャフトＳの突き当て面Ｓ１に突き当てて使用される場合がある。シール部材３０を用いる本実施形態の場合、非接触リップ３０ｃがグリース保持溝８内に入り込んでいるため、グリース保持溝８も底面８ｃの径方向寸法を大きくする必要がある。このため、円筒状の外周面８ｂが内輪３の軸方向端面３ｃまで延在すると、内輪３の軸方向端面３ｃの肉厚が薄くなってしまう。 The axial end surface 3c of the inner ring 3 may be used by abutting against the abutting surface S1 of the shaft S to which the inner ring 3 fits. In the case of the present embodiment using the sealing member 30, since the non-contact lip 30c has entered the grease holding groove 8, it is necessary to increase the radial dimension of the bottom surface 8c of the grease holding groove 8. Therefore, if the cylindrical outer peripheral surface 8b extends to the axial end surface 3c of the inner ring 3, the wall thickness of the axial end surface 3c of the inner ring 3 becomes thin.

したがって、本実施形態のように、傾斜部８ｄを設けて内輪３の軸方向端面３ｃの径方向寸法を大きくすることで、シャフトＳの突き当て面Ｓ１を内輪３の軸方向端面３ｃに十分に当接させることができ、転がり軸受１ｄ、１ｅをシャフトＳに対して確実に位置決めすることができる。 Therefore, as in the present embodiment, by providing the inclined portion 8d and increasing the radial dimension of the axial end surface 3c of the inner ring 3, the abutting surface S1 of the shaft S is sufficiently set as the axial end surface 3c of the inner ring 3. The rolling bearings 1d and 1e can be brought into contact with each other and can be reliably positioned with respect to the shaft S.

尚、本発明は、前述した実施形態及び変形例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。 The present invention is not limited to the above-described embodiments and modifications, and modifications, improvements, and the like can be made as appropriate.

たとえば、上記実施形態では、深溝玉軸受を用いて説明しているが、本発明の転がり軸受は、他の形式のものであってもよい。 For example, in the above embodiment, the deep groove ball bearing is used, but the rolling bearing of the present invention may be of another type.

１、１ａ、１ｂ、１ｃ、１ｄ 深溝玉軸受（転がり軸受）
２ 外輪
２ａ 外輪軌道面
３ 内輪
３ａ 内輪軌道面
６ 玉（転動体）
７ 保持器
８ グリース保持溝
２０ シールド部材（密封装置）
２０ｄ 円筒部（内径側端部）
２５ 堰形成部材
３０ シール部材（密封装置）
３０ｃ 非接触リップ（内径側端部）
３１ 芯金
Ｇ グリース 1,1a, 1b, 1c, 1d deep groove ball bearings (rolling bearings)
2 Outer ring 2a Outer ring raceway surface 3 Inner ring 3a Inner ring raceway surface 6 balls (rolling element)
7 Cage 8 Grease holding groove 20 Shield member (sealing device)
20d Cylindrical part (inner diameter side end)
25 Weir forming member 30 Sealing member (sealing device)
30c non-contact lip (inner diameter side end)
31 Core metal G grease

Claims (4)

内周面に外輪軌道面を有する外輪と、
外周面に内輪軌道面を有する内輪と、
前記外輪軌道面及び前記内輪軌道面間に配置された複数の玉と、
前記外輪の軸方向端部に取り付けられる円輪状の密封装置と、
を備える転がり軸受であって、
前記内輪の軸方向端部には、充填されたグリースを保持するグリース保持溝が形成され、
前記密封装置の内周側端部は、前記グリース保持溝内に入り込んで非接触に配置され、且つ、前記グリース保持溝に保持された前記グリースと接触している、転がり軸受。 An outer ring having an outer ring raceway surface on the inner peripheral surface,
An inner ring having an inner ring raceway surface on the outer peripheral surface,
A plurality of balls arranged between the outer ring raceway surface and the inner ring raceway surface, and
An annular sealing device attached to the axial end of the outer ring,
It is a rolling bearing equipped with
A grease holding groove for holding the filled grease is formed at the axial end of the inner ring.
A rolling bearing in which the inner peripheral end portion of the sealing device enters the grease holding groove and is arranged in a non-contact manner, and is in contact with the grease held in the grease holding groove. 前記密封装置は、シールド部材または、芯金に弾性部材が一体に固着されたシール部材により構成され、
前記グリース保持溝は、軸方向端面側から軸方向に凹んだ環状凹部である、請求項１に記載の転がり軸受。 The sealing device is composed of a shield member or a sealing member in which an elastic member is integrally fixed to a core metal.
The rolling bearing according to claim 1, wherein the grease holding groove is an annular recess recessed in the axial direction from the end face side in the axial direction. 前記グリース保持溝の内周面には、前記グリース保持溝の開口部において半径方向内方に延出する堰形成部材が圧入されている、請求項２に記載の転がり軸受。 The rolling bearing according to claim 2, wherein a weir forming member extending inward in the radial direction is press-fitted onto the inner peripheral surface of the grease holding groove. 前記密封装置は、前記シール部材により構成され、
前記内輪のグリース保持溝は、外周面に前記内輪の軸方向端面まで傾斜して延び、前記密封装置の内径側端部の軸方向端面と対向する傾斜部を有する、請求項２又は３に記載の転がり軸受。 The sealing device is composed of the sealing member.
2. Rolling bearing.
JP2020001376A 2020-01-08 2020-01-08 Rolling bearing Pending JP2021110357A (en)

Priority Applications (1)

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Publications (1)

Publication Number Publication Date
JP2021110357A true JP2021110357A (en) 2021-08-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020001376A Pending JP2021110357A (en) 2020-01-08 2020-01-08 Rolling bearing

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112211899A (en) * 2019-07-12 2021-01-12 斯凯孚公司 Bearing unit with small cross section

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112211899A (en) * 2019-07-12 2021-01-12 斯凯孚公司 Bearing unit with small cross section

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