JP2014190377A - Bearing device - Google Patents

Bearing device Download PDF

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JP2014190377A
JP2014190377A JP2013064591A JP2013064591A JP2014190377A JP 2014190377 A JP2014190377 A JP 2014190377A JP 2013064591 A JP2013064591 A JP 2013064591A JP 2013064591 A JP2013064591 A JP 2013064591A JP 2014190377 A JP2014190377 A JP 2014190377A
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Prior art keywords
seal
outer ring
inner ring
bearing device
side member
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Japanese (ja)
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Shin Kawai
慎 河井
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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
    • F16C33/7896—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members with two or more discrete sealings arranged in series
    • 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
    • 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
    • F16C2360/00—Engines or pumps
    • F16C2360/44—Centrifugal pumps
    • 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
    • F16C33/7843—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 single annular sealing disc
    • F16C33/7853—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 single annular sealing disc with one or more sealing lips to contact the inner race
    • F16C33/7856—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 single annular sealing disc with one or more sealing lips to contact the inner race with a single sealing lip
    • 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
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device that makes it possible to use a general-purpose sealed roll bearing while improving seal performance.SOLUTION: A bearing device 1 includes a sealed roll bearing 10 and an exterior seal plate 20 that forms a seal between an outer ring end surface 11d and the exterior seal plate 20. The exterior seal plate 20 includes a core bar 25 and an elastic member 26 having a first seal lip 27 that covers at least a part of the core bar 25 and extends toward the outer ring end surface 11d. The exterior seal plate 20 is held between any two of a step part 32 formed on an inner ring-side member 30, a spacer 31, and an inner ring end surface 12c.

Description

本発明は、軸受装置に関し、より詳細には、シール機能を向上させた軸受装置に関する。   The present invention relates to a bearing device, and more particularly to a bearing device having an improved sealing function.

ダストや水等が飛散する環境で使用される転がり軸受には、これらが内輪と外輪の間の軸受空間へ浸入するのを防止するために、接触シール等のシール板で軸受空間を密封した密封型転がり軸受が用いられている。   For rolling bearings used in environments where dust or water is scattered, the bearing space is sealed with a sealing plate such as a contact seal to prevent these from entering the bearing space between the inner and outer rings. A type rolling bearing is used.

特許文献１には、この密封型転がり軸受のシール機能を更に向上させるため、軸受空間を内側と外側の２つの接触シールで密封し、外側の接触シールに内外２枚のリップを設け、外側の接触シールの内外２枚のリップのうちの外側のリップをシール摺接面と面接触させ、内側のリップをシール摺接面と線接触させるようにした密封型転がり軸受が開示されている。   In Patent Document 1, in order to further improve the sealing function of this sealed rolling bearing, the bearing space is sealed with two inner and outer contact seals, and two outer and inner lips are provided on the outer contact seal. A sealed rolling bearing is disclosed in which the outer lip of the two inner and outer lips of the contact seal is in surface contact with the seal sliding contact surface, and the inner lip is in line contact with the seal sliding contact surface.

特許第４６７６２１２号公報Japanese Patent No. 4676212

しかしながら、特許文献１に記載の密封型転がり軸受は、外輪及び内輪の形状を汎用の転がり軸受から変更させる必要があり、専用の設計となるので、汎用の密封型転がり軸受を利用できないという課題があった。   However, the sealed-type rolling bearing described in Patent Document 1 needs to change the shape of the outer ring and the inner ring from a general-purpose rolling bearing, and has a dedicated design. Therefore, there is a problem that a general-purpose sealed-type rolling bearing cannot be used. 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、シール性能を向上させつつ、汎用の密封型転がり軸受を利用可能な軸受装置を提供することにある。   The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a bearing device that can use a general-purpose sealed rolling bearing while improving sealing performance.

本発明の上記目的は、下記の構成により達成される。
（１） 内輪と、外輪と、該内輪と該外輪との間に転動自在に配置される複数の転動体と、前記外輪の内周面に取り付けられる一対の第１シール板と、を備え、前記内輪が相対回転する一方の部材である内輪側部材に取り付けられると共に、前記外輪が相対回転する他方の部材である外輪側部材に取り付けられる密封型転がり軸受と、
前記外輪の端面との間でシールを形成する第２シール板と、を備え、
前記第２シール板は、心金と、該心金の少なくとも一部を覆い、前記外輪の端面に向かって延びる第１シールリップを有する弾性部材と、を有し、
前記第２シール板は、前記内輪側部材に形成される段部、スペーサー、前記内輪の端面のいずれか２つに挟持されることを特徴とする軸受装置。
（２） 前記第２シール板の前記弾性部材は、挟持される部位を含めて、前記心金の外側端面全体を覆っていることを特徴とする（１）に記載の軸受装置。
（３） 前記第１シールリップは、前記外輪の端面に接触していることを特徴とする（１）又は（２）に記載の軸受装置。
（４） 前記弾性部材は、さらに前記外輪側部材に向かって延びる第２シールリップを有し、
前記第２シールリップは、前記外輪側部材に接触するか、又は、前記外輪側部材との間でラビリンスシールを形成することを特徴とする（１）〜（３）のいずれかに記載の軸受装置。
（５） 前記第２シールリップから前記第１シールリップまで連続した平坦面で形成されていることを特徴とする（４）に記載の軸受装置。
（６） 内輪と、外輪と、該内輪と該外輪との間に転動自在に配置される複数の転動体と、前記外輪の内周面に取り付けられる一対の第１シール板と、を備え、前記内輪が相対回転する一方の部材である内輪側部材に取り付けられると共に、前記外輪が相対回転する他方の部材である外輪側部材に取り付けられる密封型転がり軸受と、
前記内輪の端面との間でシールを形成する第２シール板と、を備え、
前記第２シール板は、心金と、該心金の少なくとも一部を覆い、前記内輪の端面に向かって延びる第１シールリップを有する弾性部材と、を有し、
前記第２シール板は、前記外輪側部材に形成される段部、スペーサー、前記外輪の端面のいずれか２つに挟持されることを特徴とする軸受装置。
（７） 前記第２シール板の前記弾性部材は、挟持される部位を含めて、前記心金の外側端面全体を覆っていることを特徴とする（６）に記載の軸受装置。
（８） 前記第１シールリップは、前記内輪の端面に接触していることを特徴とする（６）又は（７）に記載の軸受装置。
（９） 前記弾性部材は、さらに前記内輪側部材に向かって延びる第２シールリップを有し、
前記第２シールリップは、前記内輪側部材に接触するか、又は、前記内輪側部材との間でラビリンスシールを形成することを特徴とする（６）〜（８）のいずれかに記載の軸受装置。
（１０） 前記第２シールリップから前記第１シールリップまで連続した平坦面で形成されていることを特徴とする（９）に記載の軸受装置。
（１１） ウォータポンプに用いられることを特徴とする（１）〜（１０）のいずれかに記載の軸受装置。 The above object of the present invention can be achieved by the following constitution.
(1) An inner ring, an outer ring, a plurality of rolling elements that are rotatably arranged between the inner ring and the outer ring, and a pair of first seal plates that are attached to the inner peripheral surface of the outer ring. A sealed type rolling bearing attached to an inner ring side member that is one member of which the inner ring is relatively rotated and attached to an outer ring side member that is the other member of which the outer ring is relatively rotated;
A second seal plate that forms a seal with the end surface of the outer ring,
The second seal plate includes a mandrel, and an elastic member having a first seal lip that covers at least a part of the mandrel and extends toward an end surface of the outer ring,
The bearing device, wherein the second seal plate is sandwiched between any two of a step portion formed on the inner ring side member, a spacer, and an end surface of the inner ring.
(2) The bearing device according to (1), wherein the elastic member of the second seal plate covers the entire outer end surface of the mandrel including a portion to be sandwiched.
(3) The bearing device according to (1) or (2), wherein the first seal lip is in contact with an end face of the outer ring.
(4) The elastic member further includes a second seal lip extending toward the outer ring side member,
The bearing according to any one of (1) to (3), wherein the second seal lip is in contact with the outer ring side member or forms a labyrinth seal with the outer ring side member. apparatus.
(5) The bearing device according to (4), wherein the bearing device is formed with a flat surface continuous from the second seal lip to the first seal lip.
(6) An inner ring, an outer ring, a plurality of rolling elements arranged so as to be able to roll between the inner ring and the outer ring, and a pair of first seal plates attached to the inner peripheral surface of the outer ring. A sealed type rolling bearing attached to an inner ring side member that is one member of which the inner ring is relatively rotated and attached to an outer ring side member that is the other member of which the outer ring is relatively rotated;
A second seal plate that forms a seal with the end face of the inner ring,
The second seal plate includes a mandrel, and an elastic member having a first seal lip that covers at least a part of the mandrel and extends toward an end surface of the inner ring,
The bearing device, wherein the second seal plate is sandwiched between any two of a step portion formed on the outer ring side member, a spacer, and an end surface of the outer ring.
(7) The bearing device according to (6), wherein the elastic member of the second seal plate covers the entire outer end surface of the mandrel including a portion to be sandwiched.
(8) The bearing device according to (6) or (7), wherein the first seal lip is in contact with an end face of the inner ring.
(9) The elastic member further includes a second seal lip extending toward the inner ring side member,
The bearing according to any one of (6) to (8), wherein the second seal lip is in contact with the inner ring side member or forms a labyrinth seal with the inner ring side member. apparatus.
(10) The bearing device according to (9), wherein the bearing device is formed with a flat surface continuous from the second seal lip to the first seal lip.
(11) The bearing device according to any one of (1) to (10), which is used in a water pump.

本発明の上記（１）の軸受装置によれば、外輪の端面との間でシールを形成する第２シール板を内輪側部材に形成される段部、スペーサー、内輪の端面のいずれか２つに挟持させることで、汎用の密封型転がり軸受を利用しながら、シール機能を向上させることができる。   According to the bearing device of the above (1) of the present invention, any two of the stepped portion formed on the inner ring side member, the spacer, and the end face of the inner ring are provided with the second seal plate that forms a seal with the end face of the outer ring. By being sandwiched between the two, a sealing function can be improved while using a general-purpose sealed rolling bearing.

本発明の上記（２）の軸受装置によれば、弾性部材が、挟持される部位を含めて、心金の外側端面全体を覆うことにより、錆抑制効果を有することに加えて、加工精度が悪い場合であっても、接触シールのリップ押圧のばらつきを抑えることができる。   According to the bearing device of the above (2) of the present invention, the elastic member covers the entire outer end surface of the mandrel including the portion to be sandwiched, and thus has a rust suppressing effect, and the processing accuracy is high. Even in a bad case, it is possible to suppress variations in the lip pressing of the contact seal.

本発明の上記（３）の軸受装置によれば、第１シールリップが外輪の端面に接触することで、よりシール性能を高めることができる。   According to the bearing device of (3) of the present invention, the sealing performance can be further enhanced by the first seal lip coming into contact with the end face of the outer ring.

本発明の上記（４）の軸受装置によれば、第２シールリップが外輪側部材との間でシールを形成することで、よりシール性能を高めることができる。また、第２シールリップは、外輪側部材に接触することでさらにシール性能を高めることができる。一方、外輪側部材に接触せずにラビリンスシールを形成することで、回転トルクの変化を回避することができる。   According to the bearing device of (4) of the present invention, the second seal lip forms a seal with the outer ring side member, so that the sealing performance can be further enhanced. Further, the second seal lip can further enhance the sealing performance by contacting the outer ring side member. On the other hand, a change in rotational torque can be avoided by forming the labyrinth seal without contacting the outer ring side member.

本発明の上記（５）の軸受装置によれば、弾性部材が比較的単純な形状となり、容易に製造することができる。   According to the bearing device of (5) of the present invention, the elastic member has a relatively simple shape and can be easily manufactured.

本発明の上記（６）の軸受装置によれば、内輪の端面との間でシールを形成する第２シール板を外輪側部材に形成される段部、スペーサー、外輪の端面のいずれか２つに挟持させることで、汎用の密封型転がり軸受を利用しながら、シール機能を向上させることができる。   According to the bearing device of (6) of the present invention, any two of the stepped portion formed on the outer ring side member, the spacer, and the end surface of the outer ring are provided with the second seal plate that forms a seal with the end surface of the inner ring. By being sandwiched between the two, a sealing function can be improved while using a general-purpose sealed rolling bearing.

本発明の上記（７）の軸受装置によれば、弾性部材が、挟持される部位を含めて、心金の外側端面全体を覆うことにより、錆抑制効果を有することに加えて、加工精度が悪い場合であっても、接触シールのリップ押圧のばらつきを抑えることができる。   According to the bearing device of the above (7) of the present invention, the elastic member covers the entire outer end surface of the mandrel including the portion to be sandwiched, so that it has a rust suppressing effect, and processing accuracy is improved. Even in a bad case, it is possible to suppress variations in the lip pressing of the contact seal.

本発明の上記（８）の軸受装置によれば、第１シールリップが内輪の端面に接触することで、よりシール性能を高めることができる。   According to the bearing device of (8) of the present invention, the sealing performance can be further enhanced by the first seal lip contacting the end face of the inner ring.

本発明の上記（９）の軸受装置によれば、第２シールリップが内輪側部材との間でシールを形成することで、よりシール性能を高めることができる。また、第２シールリップは、内輪側部材に接触することでさらにシール性能を高めることができる。一方、内輪側部材に接触せずにラビリンスシールを形成することで、回転トルクの変化を回避することができる。   According to the bearing device of (9) of the present invention, the second seal lip forms a seal with the inner ring side member, so that the sealing performance can be further enhanced. Further, the second seal lip can further improve the sealing performance by contacting the inner ring side member. On the other hand, a change in rotational torque can be avoided by forming the labyrinth seal without contacting the inner ring side member.

本発明の上記（１０）の軸受装置によれば、弾性部材が比較的単純な形状となり、容易に製造することができる。   According to the bearing device of (10) of the present invention, the elastic member has a relatively simple shape and can be easily manufactured.

本発明の上記（１１）の軸受装置によれば、転がり軸受の密封性能が求められるウォーターポンプのシール性能を向上させることができる。   According to the bearing device of (11) of the present invention, the sealing performance of the water pump that requires the sealing performance of the rolling bearing can be improved.

本発明に係る第１実施形態の軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing device of a 1st embodiment concerning the present invention. 本発明に係る第２実施形態の軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing device of a 2nd embodiment concerning the present invention. 本発明に係る第３実施形態の軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing device of a 3rd embodiment concerning the present invention. 本発明に係る第４実施形態の軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing device of a 4th embodiment concerning the present invention. 本発明に係る第５実施形態の軸受装置の部分断面図である。It is a fragmentary sectional view of the bearing device of a 5th embodiment concerning the present invention. 図１の軸受装置が適用されたウォーターポンプの一実施形態の断面図である。It is sectional drawing of one Embodiment of the water pump to which the bearing apparatus of FIG. 1 was applied.

以下、本発明に係る軸受装置の各実施形態について、図面に基づいて詳細に説明する。   Hereinafter, each embodiment of the bearing device according to the present invention will be described in detail with reference to the drawings.

（第１実施形態）
まず、図１を参照して、本発明に係る第１実施形態の軸受装置について説明する。 (First embodiment)
First, a bearing device according to a first embodiment of the present invention will be described with reference to FIG.

本実施形態の軸受装置１は、密封型転がり軸受１０と、外装シール板２０と、を備えて構成される。密封型転がり軸受１０は、外輪１１、内輪１２、一対の内装シール板１３、保持器１４及び玉１８を備える深溝玉軸受である。   The bearing device 1 of this embodiment includes a sealed rolling bearing 10 and an exterior seal plate 20. The sealed rolling bearing 10 is a deep groove ball bearing including an outer ring 11, an inner ring 12, a pair of interior seal plates 13, a cage 14, and balls 18.

外輪１１はその内周面に外輪軌道１１ａを有し、内輪１２はその外周面に内輪軌道１２ａを有する。また、外輪軌道１１ａと内輪軌道１２ａとの間には、保持器１４に転動自在に保持された複数の玉１８を備えている。そして、玉１８の転動によって外輪１１と内輪１２とは相対回転が自在になっている。   The outer ring 11 has an outer ring raceway 11a on its inner peripheral surface, and the inner ring 12 has an inner ring raceway 12a on its outer peripheral surface. A plurality of balls 18 are provided between the outer ring raceway 11a and the inner ring raceway 12a. The outer ring 11 and the inner ring 12 can be freely rotated relative to each other by the rolling of the balls 18.

また、外輪１１の内周面両端、即ち外輪軌道１１ａの両側には係合溝１１ｂが全周に亘って形成され、係合溝１１ｂの軸方向外側には係合溝１１ｂよりも径方向寸法の小さい口元部１１ｃが形成される。また、内輪１２の外周面両端、即ち内輪軌道１２ａの両側には凹溝１２ｂが全周に亘って形成される。   Engaging grooves 11b are formed on both ends of the inner ring surface of the outer ring 11, that is, on both sides of the outer ring raceway 11a, and the outer dimension of the engaging groove 11b in the axial direction is more radial than the engaging groove 11b. A small mouth portion 11c is formed. Further, a concave groove 12b is formed over the entire circumference at both ends of the outer peripheral surface of the inner ring 12, that is, at both sides of the inner ring raceway 12a.

内装シール板１３は心金２３と心金２３の少なくとも一部を覆う弾性部材２４とから、全体で円輪状に形成される。この弾性部材２４の外周縁２４ａを係合溝１１ｂに係合することで、内装シール板１３は外輪１１に固定されている。そして、弾性部材２４の内周縁がシールリップ２４ｂをなし、シールリップ２４ｂの先端縁を内輪１２の外周面両端に形成した凹溝１２ｂ内に進入させると共に、凹溝１２ｂの一部表面に全周に亘って摺接させている。   The interior seal plate 13 is formed in an annular shape as a whole from a mandrel 23 and an elastic member 24 covering at least a part of the mandrel 23. The inner seal plate 13 is fixed to the outer ring 11 by engaging the outer peripheral edge 24a of the elastic member 24 with the engagement groove 11b. Then, the inner peripheral edge of the elastic member 24 forms a seal lip 24b, and the tip edge of the seal lip 24b is caused to enter the recessed groove 12b formed at both ends of the outer peripheral surface of the inner ring 12, and the entire surface is partially surrounded by the groove 12b. Is in sliding contact.

そして、密封型転がり軸受１０を使用するときは、内装シール板１３、外輪１１の内周面及び内輪１２の外周面に囲まれ、保持器１４と玉１８が存在する軸受空間内にグリース等の潤滑剤を充填し、外輪軌道１１ａ、内輪軌道１２ａ及び玉１８の転動面の間の潤滑を図っている。また、内装シール板１３が軸受空間を外部から遮断し、外部から軸受空間内へ異物等が進入することを防止している。   When the sealed rolling bearing 10 is used, the inner seal plate 13, the inner peripheral surface of the outer ring 11, and the outer peripheral surface of the inner ring 12 are surrounded by a bearing or the like in the bearing space where the balls 18 exist. Lubricant is filled to lubricate the outer ring raceway 11a, the inner ring raceway 12a, and the rolling surfaces of the balls 18. Further, the interior seal plate 13 blocks the bearing space from the outside, and prevents foreign matter and the like from entering the bearing space from the outside.

この密封型転がり軸受１０は、内輪１２が相対回転する一方の部材である内輪側部材３０に取り付けられると共に、外輪１１が相対回転する他方の部材である外輪側部材４０に取り付けられ、内輪側部材３０と外輪側部材４０の相対回転が許容される。   The sealed type rolling bearing 10 is attached to an inner ring side member 30 which is one member to which the inner ring 12 is relatively rotated, and is attached to an outer ring side member 40 which is the other member to which the outer ring 11 is relatively rotated. 30 and the outer ring side member 40 are allowed to rotate relative to each other.

内輪側部材３０には、スペーサー３１が取り付けられ、内輪１２はスペーサー３１に位置決めされるが、スペーサー３１側の内輪端面１２ｃとスペーサー３１の内輪側端面３１ａとの間には、外装シール板２０が挟持される。   A spacer 31 is attached to the inner ring side member 30, and the inner ring 12 is positioned by the spacer 31, and an exterior seal plate 20 is provided between the inner ring end surface 12 c on the spacer 31 side and the inner ring side end surface 31 a of the spacer 31. It is pinched.

外装シール板２０は、心金２５と心金２５の外側端面全体を覆う弾性部材２６とから、全体で円輪状に形成される。心金２５は、内輪１２と略等しい内径寸法を有し、径方向外側に延びる支持部２５ａと、該支持部２５ａの外径端部に接続されて径方向外側且つ軸方向に密封型転がり軸受１０から離れる方向に延びるテーパ部２５ｂと、テーパ部２５ｂの外径端部に接続されてさらに径方向外側延びる先端部２５ｃと、を有する。   The exterior seal plate 20 is formed in an annular shape as a whole from a mandrel 25 and an elastic member 26 covering the entire outer end surface of the mandrel 25. The mandrel 25 has an inner diameter that is substantially the same as that of the inner ring 12, a support portion 25 a that extends radially outward, and is connected to an outer diameter end of the support portion 25 a so as to be sealed radially in the radial direction and axially. 10 has a taper portion 25b extending in a direction away from 10, and a tip portion 25c connected to the outer diameter end portion of the taper portion 25b and further extending radially outward.

心金２５の外側端面全体を覆う弾性部材２６には、心金２５の先端部２５ｃに外輪端面１１ｄに向かって延びる断面先細状の第１シールリップ２７が形成され、第１シールリップ２７が外輪端面１１ｄに接触して接触シールを構成している。さらに、弾性部材２６には、心金２５の先端部２５ｃに径方向外側に延びる断面矩形状の第２シールリップ２８が形成され、ラビリンス隙間を介して外輪側部材４０と対向し、非接触シールを構成している。   The elastic member 26 that covers the entire outer end surface of the mandrel 25 is formed with a first seal lip 27 having a tapered cross section extending toward the outer ring end surface 11d at the tip 25c of the mandrel 25, and the first seal lip 27 is formed on the outer ring. A contact seal is formed in contact with the end surface 11d. Further, the elastic member 26 is formed with a second seal lip 28 having a rectangular cross section extending outward in the radial direction at the distal end portion 25c of the mandrel 25. The second seal lip 28 is opposed to the outer ring side member 40 through a labyrinth gap and is non-contact sealed. Is configured.

このように本実施形態の軸受装置１によれば、外輪端面１１ｄとの間でシールを形成する外装シール板２０を内輪側部材３０に形成されるスペーサー３１と内輪端面１２ｃに挟持させることで、汎用の密封型転がり軸受１０を利用しながら、シール機能を向上させることができる。   Thus, according to the bearing device 1 of the present embodiment, the outer seal plate 20 that forms a seal with the outer ring end surface 11d is sandwiched between the spacer 31 formed on the inner ring side member 30 and the inner ring end surface 12c. The sealing function can be improved while using the general-purpose sealed rolling bearing 10.

また、第１シールリップ２７が外輪端面１１ｄに接触して接触シールを構成することで、よりシール性能を高めることができる。   Further, the first seal lip 27 is in contact with the outer ring end surface 11d to form a contact seal, whereby the sealing performance can be further improved.

さらに、第２シールリップ２８が外輪側部材４０との間でラビリンス隙間を介して対向し非接触シールを構成することでさらにシール性能を高めつつ、回転トルクの変化を回避することができる。   Further, the second seal lip 28 is opposed to the outer ring side member 40 through a labyrinth gap to constitute a non-contact seal, thereby making it possible to avoid a change in rotational torque while further improving the seal performance.

また、弾性部材２６が心金２５の外側端面全体を覆うことにより、錆抑制効果を有する。さらに、スペーサー３１側の内輪端面１２ｃとスペーサー３１の内輪側端面３１ａとの間に挟まれた心金２５の支持部２５ａにも弾性部材２６が設けられているので、加工精度が悪い場合であっても、位置決め部に弾性部材２６を挟むことにより、接触シールのリップ押圧のばらつきを抑えることができる。   Further, the elastic member 26 covers the entire outer end face of the mandrel 25, thereby having a rust suppressing effect. Further, since the elastic member 26 is also provided on the support portion 25a of the mandrel 25 sandwiched between the inner ring end surface 12c on the spacer 31 side and the inner ring side end surface 31a of the spacer 31, the processing accuracy is poor. However, it is possible to suppress variations in the lip pressing of the contact seal by sandwiching the elastic member 26 between the positioning portions.

なお、本実施形態及び以降の実施形態において、第１シールリップ２７及び第２シールリップ２８の形状は、適宜変更することができる。接触シールを構成するシールリップでは回転トルクへの影響を小さくするため接触部の面積を小さくすることが好ましく、非接触シールを構成するシールリップではラビリンス隙間を形成する領域を長く確保することが好ましい。   In addition, in this embodiment and subsequent embodiment, the shape of the 1st seal lip 27 and the 2nd seal lip 28 can be changed suitably. In the seal lip constituting the contact seal, it is preferable to reduce the area of the contact portion in order to reduce the influence on the rotational torque, and in the seal lip constituting the non-contact seal, it is preferable to ensure a long region for forming the labyrinth gap. .

なお、本実施形態では、第１シールリップ２７を接触シールとして第２シールリップ２８を非接触シールとしたが、反対に第１シールリップ２７を非接触シールとして第２シールリップ２８を接触シールとしてもよく、第１シールリップ２７と第２シールリップ２８の両方を接触シールとしてもよく、第１シールリップ２７と第２シールリップ２８の両方を非接触シールとしてもよい。   In the present embodiment, the first seal lip 27 is a contact seal and the second seal lip 28 is a non-contact seal. Conversely, the first seal lip 27 is a non-contact seal and the second seal lip 28 is a contact seal. Alternatively, both the first seal lip 27 and the second seal lip 28 may be contact seals, and both the first seal lip 27 and the second seal lip 28 may be non-contact seals.

（第２実施形態）
次に、図２を参照して、本発明に係る第２実施形態の軸受装置について説明する。なお、本実施形態の軸受装置は、第２シールリップ２８の構成が第１実施形態の軸受装置１と異なる点を除き第１実施形態の軸受装置１と同一の構成を有するので、同一の構成部分については同一符号を付して説明を省略する。 (Second Embodiment)
Next, a bearing device according to a second embodiment of the present invention will be described with reference to FIG. The bearing device of the present embodiment has the same configuration as the bearing device 1 of the first embodiment except that the configuration of the second seal lip 28 is different from the bearing device 1 of the first embodiment. Parts are denoted by the same reference numerals and description thereof is omitted.

本実施形態の軸受装置１Ａでは、第２シールリップ２８が、心金２５の先端部２５ｃに径方向外側に先細状に延びて、外輪側部材４０に接触して接触シールを構成している。このように、第２シールリップ２８が外輪側部材４０に接触することでさらにシール性能を高めることができる。   In the bearing device 1 </ b> A of the present embodiment, the second seal lip 28 extends radially outward from the distal end portion 25 c of the mandrel 25 and contacts the outer ring side member 40 to constitute a contact seal. Thus, the sealing performance can be further enhanced by the second seal lip 28 coming into contact with the outer ring side member 40.

（第３実施形態）
次に、図３を参照して、本発明に係る第３実施形態の軸受装置について説明する。なお、本実施形態の軸受装置は、外装シール板２０の構成及び取り付け態様が第１実施形態の軸受装置１と異なる点を除き第１実施形態の軸受装置１と同一の構成を有するので、同一の構成部分については同一符号を付して説明を省略する。 (Third embodiment)
Next, a bearing device according to a third embodiment of the present invention will be described with reference to FIG. The bearing device of the present embodiment has the same configuration as the bearing device 1 of the first embodiment, except that the configuration and mounting mode of the exterior seal plate 20 are different from the bearing device 1 of the first embodiment. The same reference numerals are assigned to the components, and description thereof is omitted.

本実施形態の軸受装置１Ｂでは、内輪１２が内輪側部材３０に一体形成された段部３２の内輪側端面３２ａに当接して位置決めされており、外装シール板２０が段部３２の内輪側端面３２ａとは反対側の反内輪側端面３２ｂとスペーサー３１の内輪側端面３１ａとの間に挟持される。   In the bearing device 1B of the present embodiment, the inner ring 12 is positioned in contact with the inner ring side end surface 32a of the step portion 32 integrally formed with the inner ring side member 30, and the exterior seal plate 20 is positioned on the inner ring side end surface of the step portion 32. It is sandwiched between the opposite inner ring side end face 32 b on the opposite side to 32 a and the inner ring side end face 31 a of the spacer 31.

外装シール板２０の心金２５は、内輪１２と略等しい内径寸法を有し、径方向外側に延びる支持部２５ａと、該支持部２５ａの外径端部に接続されて径方向外側且つ軸方向に密封型転がり軸受１０に近づく方向に延びるテーパ部２５ｂと、テーパ部２５ｂの外径端部に接続されてさらに径方向外側延びる先端部２５ｃと、を有する。   The core 25 of the outer seal plate 20 has an inner diameter dimension substantially equal to that of the inner ring 12 and is connected to a support portion 25a extending outward in the radial direction and an outer diameter end portion of the support portion 25a. And a tapered portion 25b extending in a direction approaching the sealed rolling bearing 10, and a distal end portion 25c connected to the outer diameter end portion of the tapered portion 25b and further extending radially outward.

心金２５の外側端面全体を覆う弾性部材２６には、心金２５の先端部２５ｃに外輪端面１１ｄに向かって延びる断面先細状の第１シールリップ２７が形成され、第１シールリップ２７が外輪端面１１ｄに接触して接触シールを構成している。さらに、弾性部材２６には、心金２５の先端部２５ｃに径方向外側に延びる断面矩形状の第２シールリップ２８が形成され、ラビリンス隙間を介して外輪側部材４０と対向し、非接触シールを構成している。   The elastic member 26 that covers the entire outer end surface of the mandrel 25 is formed with a first seal lip 27 having a tapered cross section extending toward the outer ring end surface 11d at the tip 25c of the mandrel 25, and the first seal lip 27 is formed on the outer ring. A contact seal is formed in contact with the end surface 11d. Further, the elastic member 26 is formed with a second seal lip 28 having a rectangular cross section extending outward in the radial direction at the distal end portion 25c of the mandrel 25. The second seal lip 28 is opposed to the outer ring side member 40 through a labyrinth gap and is non-contact sealed. Is configured.

このように本実施形態の軸受装置１Ｂによれば、外装シール板２０を段部３２と内輪端面１２ｃに挟持させることが難しい場合等、段部３２とスペーサー３１との間に挟持させることができ、これによっても第１実施形態と同様の効果を得ることができる。   As described above, according to the bearing device 1B of the present embodiment, the outer seal plate 20 can be sandwiched between the step portion 32 and the spacer 31 when it is difficult to sandwich the outer seal plate 20 between the step portion 32 and the inner ring end face 12c. Also by this, the same effect as the first embodiment can be obtained.

（第４実施形態）
次に、図４を参照して、本発明に係る第４実施形態の軸受装置について説明する。なお、本実施形態の軸受装置は、外装シール板２０の弾性部材２６の構成が第３実施形態の軸受装置１Ｂと異なる点を除き第３実施形態の軸受装置１Ｂと同一の構成を有するので、同一の構成部分については同一符号を付して説明を省略する。 (Fourth embodiment)
Next, a bearing device according to a fourth embodiment of the present invention will be described with reference to FIG. The bearing device of the present embodiment has the same configuration as the bearing device 1B of the third embodiment, except that the configuration of the elastic member 26 of the exterior seal plate 20 is different from the bearing device 1B of the third embodiment. The same components are denoted by the same reference numerals and description thereof is omitted.

本実施形態の軸受装置１Ｃでは、外輪側部材４０に凹部４３が形成され、凹部４３に外輪１１が位置決めされている。従って、外輪側部材４０の内周面と外輪端面１１ｄとが略直交している。   In the bearing device 1 </ b> C of the present embodiment, a recess 43 is formed in the outer ring side member 40, and the outer ring 11 is positioned in the recess 43. Therefore, the inner peripheral surface of the outer ring side member 40 and the outer ring end surface 11d are substantially orthogonal to each other.

そして、弾性部材２４は、外輪側部材４０との間でラビリンス隙間を介して対向し非接触シールを構成する第２シールリップ２８から、外輪端面１１ｄに接触して接触シールを構成する第１シールリップ２７までが連続した平坦面で形成されている。これにより、ラビリンス隙間を長く確保することができるとともに、弾性部材２４が比較的単純な形状となり、容易に製造することができる。   Then, the elastic member 24 is opposed to the outer ring side member 40 via a labyrinth gap, and comes into contact with the outer ring end surface 11d from the second seal lip 28 which forms a non-contact seal, thereby forming a first seal. The lip 27 is formed as a continuous flat surface. Thereby, while being able to ensure a long labyrinth gap, the elastic member 24 has a relatively simple shape and can be easily manufactured.

なお、上記各実施形態同士の各構成を組み合わせて軸受装置を構成してもよい。また、外装シール板２０を、内輪端面１２ｃとスペーサー３１との間、段部３２とスペーサー３１との間に挟持する場合を例示したが、内輪端面１２ｃと段部３２との間に挟持してもよい。スペーサー３１は、内輪側部材３０に圧入、焼き嵌め、ねじ止め等により取り付けることができる。   In addition, you may comprise a bearing apparatus combining each structure of said each embodiment. Moreover, although the case where the exterior seal plate 20 is sandwiched between the inner ring end surface 12c and the spacer 31 and between the step portion 32 and the spacer 31 is illustrated, the outer seal plate 20 is sandwiched between the inner ring end surface 12c and the step portion 32. Also good. The spacer 31 can be attached to the inner ring side member 30 by press fitting, shrink fitting, screwing or the like.

（第５実施形態）
次に、図５を参照して、本発明に係る第５実施形態の軸受装置について説明する。これまでの第１〜第４実施形態の軸受装置１〜１Ｃでは、外装シール板２０が外輪１１との間でシールを形成する場合について説明したが、本実施形態では、外装シール板２０が内輪１２との間でシールを形成する場合について説明する。 (Fifth embodiment)
Next, a bearing device according to a fifth embodiment of the present invention will be described with reference to FIG. In the bearing devices 1 to 1C of the first to fourth embodiments so far, the case where the exterior seal plate 20 forms a seal with the outer ring 11 has been described. However, in this embodiment, the exterior seal plate 20 is the inner ring. The case where a seal | sticker is formed between 12 is demonstrated.

本実施形態の軸受装置１Ｄでは、外輪側部材４０に、内径側に張り出す段部４２が設けられ、外輪１１は段部４２に位置決めされるが、外輪端面１１ｄと段部４２の外輪側端面４２ａとの間には、外装シール板２０が挟持される。   In the bearing device 1D of the present embodiment, the outer ring side member 40 is provided with a stepped portion 42 projecting to the inner diameter side, and the outer ring 11 is positioned on the stepped portion 42, but the outer ring end surface 11d and the outer ring side end surface of the stepped portion 42 The exterior seal plate 20 is sandwiched between 42a.

外装シール板２０は、心金２５と心金２５の外側端面全体を覆う弾性部材２６とから、全体で円輪状に形成される。心金２５は、外輪１１と略等しい外径寸法を有し、径方向内側に延びる支持部２５ａと、該支持部２５ａの内径端部に接続されて径方向内側且つ軸方向に密封型転がり軸受１０から離れる方向に延びるテーパ部２５ｂと、テーパ部２５ｂの内径端部に接続されてさらに径方向内側延びる先端部２５ｃと、を有する。   The exterior seal plate 20 is formed in an annular shape as a whole from a mandrel 25 and an elastic member 26 covering the entire outer end surface of the mandrel 25. The mandrel 25 has an outer diameter dimension substantially equal to that of the outer ring 11, a support part 25 a extending radially inward, and connected to an inner diameter end of the support part 25 a so as to be sealed in the radial direction and axially. 10 has a taper portion 25b extending in a direction away from 10, and a tip portion 25c connected to the inner diameter end portion of the taper portion 25b and further extending inward in the radial direction.

心金２５の外側端面全体を覆う弾性部材２６には、心金２５の先端部２５ｃに内輪端面１２ｃに向かって延びる断面先細状の第１シールリップ２７が形成され、第１シールリップ２７が内輪端面１２ｃに接触して接触シールを構成している。さらに、弾性部材２６には、心金２５の先端部２５ｃに径方向内側に延びる断面矩形状の第２シールリップ２８が形成され、ラビリンス隙間を介して内輪側部材３０と対向し、非接触シールを構成している。   The elastic member 26 that covers the entire outer end surface of the mandrel 25 is formed with a first seal lip 27 having a tapered cross section extending toward the inner ring end surface 12c at the tip 25c of the mandrel 25, and the first seal lip 27 is the inner ring. A contact seal is formed in contact with the end face 12c. Further, the elastic member 26 is formed with a second seal lip 28 having a rectangular cross section extending radially inward at the distal end portion 25c of the mandrel 25. The second seal lip 28 is opposed to the inner ring side member 30 through a labyrinth gap and is non-contact sealed. Is configured.

このように本実施形態の軸受装置１Ｄによれば、内輪端面１２ｃとの間でシールを形成する外装シール板２０を外輪側部材４０に形成される段部４２と外輪端面１１ｄに挟持させることで、汎用の密封型転がり軸受１０を利用しながら、シール機能を向上させることができる。   As described above, according to the bearing device 1D of the present embodiment, the exterior seal plate 20 that forms a seal with the inner ring end surface 12c is sandwiched between the step portion 42 formed on the outer ring side member 40 and the outer ring end surface 11d. The sealing function can be improved while using the general-purpose sealed rolling bearing 10.

また、第１シールリップ２７が内輪端面１２ｃに接触して接触シールを構成することで、よりシール性能を高めることができる。   Further, since the first seal lip 27 is in contact with the inner ring end surface 12c to form a contact seal, the sealing performance can be further improved.

さらに、第２シールリップ２８が内輪側部材３０との間でラビリンス隙間を介して対向し非接触シールを構成することでさらにシール性能を高めつつ、回転トルクの変化を回避することができる。   Further, the second seal lip 28 is opposed to the inner ring side member 30 via a labyrinth gap to form a non-contact seal, so that a change in rotational torque can be avoided while further improving the seal performance.

また、弾性部材２６が心金２５の外側端面全体を覆うことにより、錆抑制効果を有する。さらに、外輪側部材４０に形成される段部４２と外輪端面１１ｄとの間に挟まれた心金２５の支持部２５ａにも弾性部材２６が設けられているので、加工精度が悪い場合であっても、位置決め部に弾性部材２６を挟むことにより、接触シールのリップ押圧のばらつきを抑えることができる。   Further, the elastic member 26 covers the entire outer end face of the mandrel 25, thereby having a rust suppressing effect. Further, since the elastic member 26 is also provided on the support portion 25a of the mandrel 25 sandwiched between the step portion 42 formed on the outer ring side member 40 and the outer ring end surface 11d, the processing accuracy is poor. However, it is possible to suppress variations in the lip pressing of the contact seal by sandwiching the elastic member 26 between the positioning portions.

なお、詳細な説明は省略するが、第２〜第４実施形態で説明した構成を、第５実施形態に適宜修正して採用してもよい。   In addition, although detailed description is abbreviate | omitted, you may employ | adopt suitably modifying the structure demonstrated in 2nd-4th embodiment to 5th Embodiment.

上記した実施形態の軸受装置は、耐水性が求められる状況で効果が高く、特に、ウォーターポンプに適用されることが好ましい。続いて、上記第１実施形態の軸受装置１が適用されたウォーターポンプの一実施形態について、図６を参照しながら説明する。   The bearing device of the above-described embodiment is highly effective in a situation where water resistance is required, and is particularly preferably applied to a water pump. Next, an embodiment of a water pump to which the bearing device 1 of the first embodiment is applied will be described with reference to FIG.

ウォータポンプ７０は、図６に示すように、軸方向一端側へ向かって階段状に縮径して形成されたアウターシャフト７１を有し、軸方向他端部に設けられたフランジ部７２を介して不図示のエンジンブロックの側面に固定されることによって当該エンジンブロックとの間にポンプ室を画成するほぼ円筒状に形成されたポンプハウジング７３と、該ポンプハウジング７３の内周側に軸心方向へ沿って挿通され、軸方向中間部がポンプハウジング７３によって囲繞されるインナーシャフト７４と、インナーシャフト７４のエンジンブロック側外周に固定され、ポンプ室内部において回転自在に収容配置されるインペラ７５と、インナーシャフト７４のインペラ７５側と反対側の端部に固定され、不図示のベルトを介しクランクシャフトの回転駆動力をインナーシャフト７４へと伝達するほぼ円筒状に形成されたプーリ７６と、該プーリ７６とアウターシャフト７１の先端部７１ａとの間に介装されて、プーリ７６を回転自在に支持すると共に該プーリ７６を介してインナーシャフト７４を間接的に支持する軸受装置１と、を備えている。   As shown in FIG. 6, the water pump 70 has an outer shaft 71 formed with a diameter reduced stepwise toward one end in the axial direction, and a flange portion 72 provided at the other end in the axial direction. The pump housing 73 is formed in a substantially cylindrical shape so as to define a pump chamber with the engine block by being fixed to a side surface of the engine block (not shown), and an axial center on the inner peripheral side of the pump housing 73 An inner shaft 74 that is inserted in the direction of the shaft and is surrounded by a pump housing 73, and an impeller 75 that is fixed to the outer periphery of the inner shaft 74 on the engine block side and is rotatably accommodated in the pump chamber. The inner shaft 74 is fixed to the end opposite to the impeller 75 side, and the crankshaft is driven to rotate via a belt (not shown). Between the pulley 76 and the distal end portion 71a of the outer shaft 71 so as to rotatably support the pulley 76 and the pulley 76. And a bearing device 1 that indirectly supports the inner shaft 74 via the 76.

アウターシャフト７１は、封止装置７８によってポンプ室内における冷却水の軸受装置１側への流入を抑制するようになっている。   The outer shaft 71 is configured to suppress the inflow of cooling water into the bearing device 1 in the pump chamber by the sealing device 78.

プーリ７６は、円筒状に一体に成形されており、ほぼ有蓋円筒状に形成されたボス部８０と、該ボス部８０の外周側に延設され、外周にベルトが巻回されるベルト巻回部８１と、ボス部８０から窪み形成された筒状の嵌合部８２と、を有し、該嵌合部８２がインナーシャフト７４の先端部外周に圧入されることによって当該インナーシャフト７４に固定されている。   The pulley 76 is integrally formed in a cylindrical shape, and has a boss portion 80 formed in a substantially covered cylindrical shape, and a belt winding in which a belt is wound around the outer periphery of the boss portion 80, extending to the outer peripheral side of the boss portion 80. And a cylindrical fitting portion 82 that is recessed from the boss portion 80. The fitting portion 82 is fixed to the inner shaft 74 by being press-fitted into the outer periphery of the distal end portion of the inner shaft 74. Has been.

ボス部８０は、嵌合部８２に接続され、インナーシャフト７４よりも径方向外側に延出する蓋部８０ａと、該蓋部８０ａに接続され、軸線方向に沿って延出する筒部８０ｂと、によって構成されている。なお、蓋部８０ａには、周方向の所定位置に複数の貫通孔８３が設けられていて、該各貫通孔８３を介して当該蓋部８０ａと軸受装置１との間に形成される空間部Ｓに流入した水分を外部へ排出できるようになっている。ここで、これら貫通孔８３によって、空間部Ｓ内には所定量の水分が滞留可能となっている一方、この空間部Ｓ内に滞留した水分が所定量を超えた場合は、当該各貫通孔８３を介してその空間部Ｓ内の水分を外部へと排出可能となっており、これによって、外部からの水分の浸入を抑制しつつ、空間部Ｓ内に流入した水分を軸受装置１に悪影響を及ぼさない範囲内で外部に排出できるようになっている。   The boss portion 80 is connected to the fitting portion 82 and extends to the outside in the radial direction from the inner shaft 74, and the cylindrical portion 80b connected to the lid portion 80a and extending along the axial direction. , Is composed of. The lid portion 80a is provided with a plurality of through holes 83 at predetermined positions in the circumferential direction, and a space portion formed between the lid portion 80a and the bearing device 1 through each through hole 83. The water flowing into S can be discharged to the outside. Here, a predetermined amount of moisture can be retained in the space portion S by the through holes 83, and when the moisture retained in the space portion S exceeds a predetermined amount, each through hole The moisture in the space portion S can be discharged to the outside via the reference numeral 83, whereby the moisture that has flowed into the space portion S is adversely affected to the bearing device 1 while suppressing the entry of moisture from the outside. It can be discharged to the outside within a range that does not affect

軸受装置１は、先端部７１ａの外周面と筒部８０ｂの内周面との間に介装されていて、内輪１２が内輪側部材３０としての先端部７１ａに取り付けられると共に、外輪１１が外輪側部材４０としての筒部８０ｂに取り付けられ、内輪１２と先端部７１ａに取り付けられた形成されたスペーサー３１との間に外装シール板２０が挟持されている。また、第１シールリップ２７が外輪端面１１ｄに接触して接触シールを構成し、第２シールリップ２８がラビリンス隙間を介して筒部８０ｂと対向し、非接触シールを構成している。これにより、密封型転がり軸受１０の一端部に配設された内装シール板１３にあっては、軸受空間内に封入されたグリースを軸受空間内に保持すると共に、封止装置７８によっては抑止しきれずにアウターシャフト７１内周を通じて空間部Ｓ内へと浸入してしまった冷却水や、各貫通孔８３を通じて外部から空間部Ｓ内へと浸入してしまった水分が軸受空間内へ浸入するのを抑制する役割を果たしている。   The bearing device 1 is interposed between the outer peripheral surface of the distal end portion 71a and the inner peripheral surface of the cylindrical portion 80b. The inner ring 12 is attached to the distal end portion 71a as the inner ring side member 30, and the outer ring 11 is connected to the outer ring. The exterior seal plate 20 is sandwiched between the inner ring 12 and the formed spacer 31 attached to the distal end portion 71a, which is attached to the cylindrical portion 80b as the side member 40. The first seal lip 27 is in contact with the outer ring end surface 11d to form a contact seal, and the second seal lip 28 is opposed to the cylindrical portion 80b through the labyrinth gap to form a non-contact seal. As a result, in the interior seal plate 13 disposed at one end of the sealed rolling bearing 10, the grease sealed in the bearing space is held in the bearing space and is suppressed by the sealing device 78. Instead, the cooling water that has entered the space S through the inner periphery of the outer shaft 71 and the water that has entered the space S from the outside through the through holes 83 enter the bearing space. It plays a role to suppress.

また、ウォータポンプ７０は、ポンプハウジング７３のフランジ部７２側の部分が外部に露出するようになっていることから、フランジ部７２の外側面やアウターシャフト７１の基端側の外周面に付着した雨水や結露による水滴等はアウターシャフト７１の外周面を伝って密封型転がり軸受１０側へと流れてしまうこととなるが、軸受装置１の外装シール板２０によって密封型転がり軸受１０側への水滴の浸入が抑制される。   Further, the water pump 70 is attached to the outer surface of the flange portion 72 and the outer peripheral surface of the base end side of the outer shaft 71 because the portion on the flange portion 72 side of the pump housing 73 is exposed to the outside. Raindrops and water droplets due to condensation flow along the outer peripheral surface of the outer shaft 71 and flow to the sealed rolling bearing 10 side. However, the water droplets to the sealed rolling bearing 10 side by the exterior seal plate 20 of the bearing device 1. Infiltration is suppressed.

尚、本発明は、前述した各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。   In addition, this invention is not limited to each embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.

１，１Ａ，１Ｂ，１Ｃ，１Ｄ 軸受装置
１０ 密封型転がり軸受
１１ 外輪
１１ｄ 外輪端面（外輪の端面）
１２ 内輪
１２ｃ 内輪端面（内輪の端面）
１３ 第１シール板（内装シール板）
１８ 玉（転動体）
２０ 第２シール板（外装シール板）
２５ 心金
２６ 弾性部材
２７ 第１シールリップ
２８ 第２シールリップ
３０ 内輪側部材
３１ スペーサー
３２ 段部
４０ 外輪側部材
７０ ウォータポンプ 1, 1A, 1B, 1C, 1D Bearing device 10 Sealed rolling bearing 11 Outer ring 11d Outer ring end face (end face of outer ring)
12 Inner ring 12c Inner ring end face (end face of inner ring)
13 First seal plate (interior seal plate)
18 balls (rolling elements)
20 Second seal plate (exterior seal plate)
25 Mandrel 26 Elastic member 27 First seal lip 28 Second seal lip 30 Inner ring side member 31 Spacer 32 Step part 40 Outer ring side member 70 Water pump

Claims (11)

内輪と、外輪と、該内輪と該外輪との間に転動自在に配置される複数の転動体と、前記外輪の内周面に取り付けられる一対の第１シール板と、を備え、前記内輪が相対回転する一方の部材である内輪側部材に取り付けられると共に、前記外輪が相対回転する他方の部材である外輪側部材に取り付けられる密封型転がり軸受と、
前記外輪の端面との間でシールを形成する第２シール板と、を備え、
前記第２シール板は、心金と、該心金の少なくとも一部を覆い、前記外輪の端面に向かって延びる第１シールリップを有する弾性部材と、を有し、
前記第２シール板は、前記内輪側部材に形成される段部、スペーサー、前記内輪の端面のいずれか２つに挟持されることを特徴とする軸受装置。 An inner ring, an outer ring, a plurality of rolling elements that are rotatably arranged between the inner ring and the outer ring, and a pair of first seal plates attached to an inner peripheral surface of the outer ring, the inner ring Is attached to an inner ring side member that is one member that relatively rotates, and a sealed rolling bearing that is attached to an outer ring side member that is the other member to which the outer ring relatively rotates,
A second seal plate that forms a seal with the end surface of the outer ring,
The second seal plate includes a mandrel, and an elastic member having a first seal lip that covers at least a part of the mandrel and extends toward an end surface of the outer ring,
The bearing device, wherein the second seal plate is sandwiched between any two of a step portion formed on the inner ring side member, a spacer, and an end surface of the inner ring. 前記第２シール板の前記弾性部材は、挟持される部位を含めて、前記心金の外側端面全体を覆っていることを特徴とする請求項１に記載の軸受装置。   2. The bearing device according to claim 1, wherein the elastic member of the second seal plate covers the entire outer end surface of the mandrel including a portion to be sandwiched. 前記第１シールリップは、前記外輪の端面に接触していることを特徴とする請求項１又は２に記載の軸受装置。   The bearing device according to claim 1, wherein the first seal lip is in contact with an end surface of the outer ring. 前記弾性部材は、さらに前記外輪側部材に向かって延びる第２シールリップを有し、
前記第２シールリップは、前記外輪側部材に接触するか、又は、前記外輪側部材との間でラビリンスシールを形成することを特徴とする請求項１〜３のいずれか１項記載の軸受装置。 The elastic member further has a second seal lip extending toward the outer ring side member,
The bearing device according to any one of claims 1 to 3, wherein the second seal lip contacts the outer ring side member or forms a labyrinth seal with the outer ring side member. . 前記第２シールリップから前記第１シールリップまで連続した平坦面で形成されていることを特徴とする請求項４に記載の軸受装置。   The bearing device according to claim 4, wherein the bearing device is formed of a flat surface continuous from the second seal lip to the first seal lip. 内輪と、外輪と、該内輪と該外輪との間に転動自在に配置される複数の転動体と、前記外輪の内周面に取り付けられる一対の第１シール板と、を備え、前記内輪が相対回転する一方の部材である内輪側部材に取り付けられると共に、前記外輪が相対回転する他方の部材である外輪側部材に取り付けられる密封型転がり軸受と、
前記内輪の端面との間でシールを形成する第２シール板と、を備え、
前記第２シール板は、心金と、該心金の少なくとも一部を覆い、前記内輪の端面に向かって延びる第１シールリップを有する弾性部材と、を有し、
前記第２シール板は、前記外輪側部材に形成される段部、スペーサー、前記外輪の端面のいずれか２つに挟持されることを特徴とする軸受装置。 An inner ring, an outer ring, a plurality of rolling elements that are rotatably arranged between the inner ring and the outer ring, and a pair of first seal plates attached to an inner peripheral surface of the outer ring, the inner ring Is attached to an inner ring side member that is one member that relatively rotates, and a sealed rolling bearing that is attached to an outer ring side member that is the other member to which the outer ring relatively rotates,
A second seal plate that forms a seal with the end face of the inner ring,
The second seal plate includes a mandrel, and an elastic member having a first seal lip that covers at least a part of the mandrel and extends toward an end surface of the inner ring,
The bearing device, wherein the second seal plate is sandwiched between any two of a step portion formed on the outer ring side member, a spacer, and an end surface of the outer ring. 前記第２シール板の前記弾性部材は、挟持される部位を含めて、前記心金の外側端面全体を覆っていることを特徴とする請求項６に記載の軸受装置。   The bearing device according to claim 6, wherein the elastic member of the second seal plate covers the entire outer end surface of the mandrel including a portion to be sandwiched. 前記第１シールリップは、前記内輪の端面に接触していることを特徴とする請求項６又は７に記載の軸受装置。   The bearing device according to claim 6, wherein the first seal lip is in contact with an end surface of the inner ring. 前記弾性部材は、さらに前記内輪側部材に向かって延びる第２シールリップを有し、
前記第２シールリップは、前記内輪側部材に接触するか、又は、前記内輪側部材との間でラビリンスシールを形成することを特徴とする請求項６〜８のいずれか１項に記載の軸受装置。 The elastic member further has a second seal lip extending toward the inner ring side member,
The bearing according to any one of claims 6 to 8, wherein the second seal lip contacts the inner ring side member or forms a labyrinth seal with the inner ring side member. apparatus. 前記第２シールリップから前記第１シールリップまで連続した平坦面で形成されていることを特徴とする請求項９に記載の軸受装置。   The bearing device according to claim 9, wherein the bearing device is formed of a flat surface continuous from the second seal lip to the first seal lip. ウォータポンプに用いられることを特徴とする請求項１〜１０のいずれか１項に記載の軸受装置。   It is used for a water pump, The bearing apparatus of any one of Claims 1-10 characterized by the above-mentioned.
JP2013064591A 2013-03-26 2013-03-26 Bearing device Pending JP2014190377A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3070355A1 (en) * 2015-03-16 2016-09-21 Deere & Company Bearing assembly and external bearing seal
WO2017215705A1 (en) * 2016-06-16 2017-12-21 Schaeffler Technologies AG & Co. KG Double clutch having an anti-friction bearing and a labyrinth-like seal arrangement
WO2023194976A1 (en) * 2022-04-08 2023-10-12 Delux Bearings Private Limited A bearing assembly having an arrangement for preventing ingress of debris therein

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3070355A1 (en) * 2015-03-16 2016-09-21 Deere & Company Bearing assembly and external bearing seal
WO2017215705A1 (en) * 2016-06-16 2017-12-21 Schaeffler Technologies AG & Co. KG Double clutch having an anti-friction bearing and a labyrinth-like seal arrangement
WO2023194976A1 (en) * 2022-04-08 2023-10-12 Delux Bearings Private Limited A bearing assembly having an arrangement for preventing ingress of debris therein

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