JP2012241819A - Bearing device for water pump - Google Patents

Bearing device for water pump Download PDF

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Publication number
JP2012241819A
JP2012241819A JP2011113328A JP2011113328A JP2012241819A JP 2012241819 A JP2012241819 A JP 2012241819A JP 2011113328 A JP2011113328 A JP 2011113328A JP 2011113328 A JP2011113328 A JP 2011113328A JP 2012241819 A JP2012241819 A JP 2012241819A
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Prior art keywords
cage
water pump
rolling bearing
coating layer
seal member
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Japanese (ja)
Inventor
Yuya Yamamoto
祐也 山本
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JTEKT Corp
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JTEKT Corp
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Priority to JP2011113328A priority Critical patent/JP2012241819A/en
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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
    • F16C33/784—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
    • 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
    • F16C19/49—Bearings with both balls and rollers
    • 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

Abstract

PROBLEM TO BE SOLVED: To provide a bearing device for a water pump capable of improving durability by suppressing the abrasion of a seal member.SOLUTION: The bearing device for the water pump includes: a rolling bearing 50 for rotatably supporting a rotary shaft 40 of the water pump on a housing 10; and the seal member 70 that is arranged between the inner peripheral surface of one end of an outer ring 51 of the rolling bearing 50 and the outer peripheral surface of the rotary shaft 40 and seals the inside of the rolling bearing 50. A retainer 60 for rollably retaining a rolling element 55 of the rolling bearing 50 is made of synthetic resin mixed with reinforced fiber. A coating layer 68 is disposed on at least the side of the retainer 60 facing the seal member 70.

Description

この発明は水ポンプ用軸受装置に関する。   The present invention relates to a bearing device for a water pump.

エンジンの冷却水を循環する循環経路に配設される水ポンプ用軸受装置においては、回転軸をハウジングに回転可能に支持する転がり軸受と、この転がり軸受の外輪の一端部内周面と回転軸の外周面との間に配設されて転がり軸受内を密封するシール部材とを備えている（例えば、特許文献１参照）。
また、転がり軸受の複数の転動体を転動可能に保持する保持器の強度を維持しながら軽量化等を図るため、保持器がガラス繊維等の強化繊維が混合された合成樹脂によって形成されるものが知られている。
このような強化繊維が混合された合成樹脂製の保持器は、その表面から０．２ｍｍ程度の厚さで樹脂成分が多い樹脂リッチ層が形成される。 In a bearing device for a water pump disposed in a circulation path for circulating cooling water of an engine, a rolling bearing that rotatably supports a rotating shaft on a housing, an inner peripheral surface of one end portion of an outer ring of the rolling bearing, and a rotating shaft And a seal member which is disposed between the outer peripheral surface and seals the inside of the rolling bearing (see, for example, Patent Document 1).
Further, in order to reduce the weight while maintaining the strength of the cage that holds a plurality of rolling elements of the rolling bearing in a rollable manner, the cage is formed of a synthetic resin mixed with reinforcing fibers such as glass fibers. Things are known.
A synthetic resin cage in which such reinforcing fibers are mixed is formed with a resin-rich layer having a thickness of about 0.2 mm and a large amount of resin components from the surface thereof.

特公平６−４７９９７号公報Japanese Patent Publication No. 6-47997

ところで、転がり軸受の保持器には、転動体のスキュー力が作用して保持器が軸方向へ移動されることがある。
特に、転動体がころ（円筒ころ、針状ころ等）である場合には、そのころのスキュー力（軸方向の荷重）が保持器に作用して保持器がシール部材に向けて移動されると、保持器の側面の樹脂リッチ層がシール部材に接触することがある。
この際、保持器の側面の樹脂リッチ層が接触する部分が、樹脂リッチ層よりも硬いシール部材の芯金の部分である場合、先ず、保持器の側面の樹脂リッチ層が摩耗される。その後、保持器の側面の樹脂リッチ層が全て摩耗されると、その後は、保持器に混合の強化繊維の一部が保持器の側面から露出する。
保持器の側面から露出する強化繊維はシール部材の芯金よりも硬いため、保持器の側面から露出する強化繊維によってシール部材の芯金が摩耗され、長期間の使用によってシール部材の芯金が損傷されることが想定される。 Incidentally, the cage of the rolling bearing may be moved in the axial direction by the skew force of the rolling elements.
In particular, when the rolling element is a roller (cylindrical roller, needle roller, etc.), the skew force (axial load) of the roller acts on the cage, and the cage is moved toward the seal member. Then, the resin-rich layer on the side surface of the cage may come into contact with the seal member.
At this time, when the portion where the resin-rich layer on the side surface of the cage comes into contact is a core metal portion of the sealing member that is harder than the resin-rich layer, first, the resin-rich layer on the side surface of the cage is worn. After that, when the resin-rich layer on the side surface of the cage is all worn, thereafter, a part of the reinforcing fibers mixed in the cage is exposed from the side surface of the cage.
Since the reinforcing fiber exposed from the side surface of the cage is harder than the core metal of the seal member, the core metal of the seal member is worn by the reinforcing fiber exposed from the side surface of the cage. It is assumed that it will be damaged.

この発明の目的は、前記問題点に鑑み、シール部材の摩耗を抑制して耐久性の向上を図ることができる水ポンプ用軸受装置を提供することである。   In view of the above problems, an object of the present invention is to provide a water pump bearing device that can suppress wear of a seal member and improve durability.

前記課題を解決するために、この発明の請求項１に係る水ポンプ用軸受装置は、水ポンプの回転軸をハウジングに回転可能に支持する転がり軸受と、この転がり軸受の外輪の一端部内周面と前記回転軸の外周面との間に配設されて前記転がり軸受内を密封するシール部材とを備えた水ポンプ用軸受装置であって、
前記転がり軸受の複数の転動体を転動可能に保持する保持器は、強化繊維が混合された合成樹脂によって形成され、
前記保持器の少なくとも前記シール部材に対向する側面にはコーティング層が施されていることを特徴とする。 In order to solve the above problems, a bearing device for a water pump according to claim 1 of the present invention includes a rolling bearing that rotatably supports a rotating shaft of a water pump on a housing, and an inner peripheral surface of one end of an outer ring of the rolling bearing. A water pump bearing device comprising a seal member disposed between the outer peripheral surface of the rotary shaft and a sealing member for sealing the inside of the rolling bearing,
The cage that holds the plurality of rolling elements of the rolling bearing in a rollable manner is formed of a synthetic resin mixed with reinforcing fibers,
A coating layer is applied to at least a side surface of the cage facing the seal member.

前記構成によると、転動体のスキュー力（軸方向の荷重）が保持器に作用して保持器がシール部材に向けて移動されると、保持器の側面のコーティング層がシール部材に接触することがある。
この際、保持器の側面のコーティング層が接触する部分が、コーティング層よりも硬いシール部材の芯金部分である場合、先ず、保持器の側面のコーティング層が摩耗されることがあるが、保持器に混合の強化繊維の一部が保持器の側面から露出することがない。
すなわち、保持器の側面のコーティング層が全て摩耗された後、さらに、保持器の側面の樹脂リッチ層が全て摩耗される間においては、保持器の側面から強化繊維が露出することを抑制することができる。
このため、保持器の側面から露出する強化繊維が原因となるシール部材の摩耗を抑制して耐久性の向上を図ることができる。 According to the above configuration, when the skew force (axial load) of the rolling element acts on the cage and the cage is moved toward the seal member, the coating layer on the side surface of the cage contacts the seal member. There is.
At this time, if the portion where the coating layer on the side surface of the cage is in contact with the core member of the sealing member that is harder than the coating layer, the coating layer on the side surface of the cage may be worn first. Part of the reinforcing fibers mixed in the vessel is not exposed from the side of the cage.
That is, after all the coating layer on the side surface of the cage is worn, and further while the resin-rich layer on the side surface of the cage is all worn, it is possible to prevent the reinforcing fibers from being exposed from the side surface of the cage. Can do.
For this reason, wear of the sealing member caused by the reinforcing fibers exposed from the side surface of the cage can be suppressed, and durability can be improved.

請求項２に係る水ポンプ用軸受装置は、請求項１に記載の水ポンプ用軸受装置であって、
コーティング層は、フッ素系樹脂、ポリアミド系樹脂等の耐熱性、耐摩耗性を有する樹脂によって形成されていることを特徴とする。 The water pump bearing device according to claim 2 is the water pump bearing device according to claim 1,
The coating layer is formed of a heat-resistant and wear-resistant resin such as a fluorine resin or a polyamide resin.

前記構成によると、フッ素系樹脂、ポリアミド系樹脂等の耐熱性、耐摩耗性を有する樹脂によってコーティング層が形成されることで、コーティング層の摩耗を低減することができ、この分だけ、保持器の側面から強化繊維が露出することをより一層良好に抑制することができる。   According to the above configuration, the coating layer is formed of a heat-resistant and wear-resistant resin such as a fluorine-based resin or a polyamide-based resin, so that the wear of the coating layer can be reduced. It can suppress even more satisfactorily that a reinforced fiber is exposed from the side surface.

この発明の実施例１に係る水ポンプ用軸受装置を示す縦断面図である。It is a longitudinal cross-sectional view which shows the bearing apparatus for water pumps based on Example 1 of this invention. 同じく回転軸に転がり軸受が組み付けられた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state in which the rolling bearing was similarly assembled | attached to the rotating shaft. 同じく転がり軸受の保持器とシール部材との組み付け状態を拡大して示す縦断面図である。It is the longitudinal cross-sectional view which expands and similarly shows the assembly | attachment state of the holder | retainer and seal member of a rolling bearing. 同じく保持器の樹脂リッチ層の表面にコーティング層が施された状態を拡大して示す断面図である。It is sectional drawing which expands and shows the state by which the coating layer was similarly given to the surface of the resin rich layer of a cage | basket. 同じくコーティング層が施された実施例１の保持器によるシール部材の芯金の摩耗と、コーティング層がない従来の保持器によるシール部材の芯金の摩耗を示す特性図である。It is a characteristic view which shows the abrasion of the metal core of the sealing member by the holder | retainer of Example 1 similarly provided with the coating layer, and the abrasion of the metal core of the sealing member by the conventional cage without a coating layer.

この発明を実施するための形態について実施例にしたがって説明する。   A mode for carrying out the present invention will be described in accordance with an embodiment.

この発明の実施例１を図面にしたがって説明する。
図１に示すように、この実施例１に係る水ポンプ用軸受装置は、水ポンプの回転軸４０をハウジング１０に回転可能に支持する転がり軸受５０と、この転がり軸受５０の外輪５１の端部内周面と回転軸４０の外周面との間に配設されて転がり軸受５０内を密封するシール部材７０、８０とを備える。
また、回転軸４０の一端部は、ハウジング１０の一端面から所定長さ突出されており、その突出部の外周面には、プーリ部材２０がプーリシート２３を介してトルク伝達可能に組み付けられる。
ハウジング１０の他端部内周面と、回転軸４０の他端部外周面との間にはメカニカルシール２５が介在される。、
さらに、回転軸４０の他端部は、ハウジング１０の他端面から所定長さ突出されており、その他端部（突出部）外周面には、インペラ部材３０がトルク伝達可能に組み付けられる。 A first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the water pump bearing device according to the first embodiment includes a rolling bearing 50 that rotatably supports a rotating shaft 40 of the water pump on a housing 10, and an inner end of an outer ring 51 of the rolling bearing 50. Seal members 70 and 80 are provided between the peripheral surface and the outer peripheral surface of the rotary shaft 40 to seal the inside of the rolling bearing 50.
Further, one end portion of the rotating shaft 40 protrudes from the one end surface of the housing 10 by a predetermined length, and the pulley member 20 is assembled to the outer peripheral surface of the protruding portion via the pulley seat 23 so that torque can be transmitted.
A mechanical seal 25 is interposed between the inner peripheral surface of the other end of the housing 10 and the outer peripheral surface of the other end of the rotating shaft 40. ,
Furthermore, the other end portion of the rotating shaft 40 protrudes from the other end surface of the housing 10 by a predetermined length, and the impeller member 30 is assembled to the outer peripheral surface of the other end portion (protruding portion) so as to transmit torque.

図２に示すように、転がり軸受５０は、内輪として機能する回転軸４０と、外輪５１と、複列の転動体としてのころ（円筒ころ、針状ころ等）５５及び玉５７と、保持器６０、６９とを備えている。
すなわち、回転軸４０の軸方向中央部には、両端部よりも大径な中間軸部４０ａが形成され、この中間軸部４０ａの外周面には、複列をなす内輪軌道面４１、４２が軸方向に所定距離を隔てて形成されている。
これら複列の内輪軌道面４１、４２のうち、一方の内輪軌道面４１は、複数の転動体としてのころ５５に対応する円筒面に形成され、他方の内輪軌道面４２は、複数の転動体としての玉５７に対応する縦断面凹円弧状に形成されている。 As shown in FIG. 2, the rolling bearing 50 includes a rotating shaft 40 that functions as an inner ring, an outer ring 51, rollers (cylindrical rollers, needle rollers, etc.) 55 and balls 57 as double-row rolling elements, and a cage. 60, 69.
That is, an intermediate shaft portion 40a having a larger diameter than both ends is formed in the central portion of the rotating shaft 40 in the axial direction, and inner ring raceway surfaces 41 and 42 forming double rows are formed on the outer peripheral surface of the intermediate shaft portion 40a. It is formed at a predetermined distance in the axial direction.
Of these double-row inner ring raceway surfaces 41, 42, one inner ring raceway surface 41 is formed in a cylindrical surface corresponding to the rollers 55 as a plurality of rolling elements, and the other inner ring raceway surface 42 is composed of a plurality of rolling elements. It is formed in a concave circular arc shape corresponding to the ball 57 as.

一方、図１に示すように、ハウジング１０内の軸受組込部１１には、回転軸４０の中間軸部４０ａの外周面に環状空間を隔てる外輪５１が圧入等によって組み込まれている。
図２に示すように、外輪５１の内周面には、複列の内輪軌道面４１、４２にそれぞれ対応する複列の外輪軌道面５２、５３が軸方向に所定距離を隔てて形成されている。
また、図３に示すように、外輪５１の内周面のころ５５に対応する外輪軌道面５２の片側（内部側）には、ころ５５の端面を案内する案内面を有するころ鍔５４が形成されている。
そして、回転軸４０の複列の内輪軌道面４１、４２と、外輪５１の複列の外輪軌道面５２、５３の間には、ころ５５と、玉５７とがそれぞれ保持器６０、６９によって保持された状態で転動可能に組み込まれている。 On the other hand, as shown in FIG. 1, an outer ring 51 that separates an annular space is incorporated into the outer peripheral surface of the intermediate shaft portion 40 a of the rotating shaft 40 by press-fitting or the like.
As shown in FIG. 2, double row outer ring raceway surfaces 52 and 53 respectively corresponding to the double row inner ring raceway surfaces 41 and 42 are formed on the inner peripheral surface of the outer ring 51 at a predetermined distance in the axial direction. Yes.
Further, as shown in FIG. 3, on one side (inner side) of the outer ring raceway surface 52 corresponding to the roller 55 on the inner peripheral surface of the outer ring 51, a roller collar 54 having a guide surface for guiding the end surface of the roller 55 is formed. Has been.
And between the double row inner ring raceway surfaces 41 and 42 of the rotating shaft 40 and the double row outer ring raceway surfaces 52 and 53 of the outer ring 51, rollers 55 and balls 57 are held by cages 60 and 69, respectively. It is incorporated so that it can roll in the state where it is made.

また、図３に示すように、外輪５１の内周面の一端開口部には、外輪軌道面５２よりも大径の開口孔部５８が段差面５８ａをもって形成されている。
さらに、大径の開口孔部５８の段差面５８ａと隣接する内周面には環状溝５８ｂが形成されている。
そして、外輪５１の開口孔部５８の内周面と、回転軸４０の中間軸部４０ａの一端部外周面との間には、転がり軸受５０内を密封するシール部材７０が配設されている。 As shown in FIG. 3, an opening hole 58 having a diameter larger than that of the outer ring raceway surface 52 is formed with a step surface 58 a at one end opening of the inner peripheral surface of the outer ring 51.
Further, an annular groove 58b is formed on the inner peripheral surface adjacent to the step surface 58a of the large-diameter opening hole 58.
A seal member 70 that seals the inside of the rolling bearing 50 is disposed between the inner peripheral surface of the opening hole portion 58 of the outer ring 51 and the outer peripheral surface of one end portion of the intermediate shaft portion 40 a of the rotating shaft 40. .

シール部材７０は、金属板のプレス加工によって形成された芯金７１と、ゴム、軟質樹脂等によって形成された弾性体７５とを備えている。
芯金７１は、外径側環状部７２と、中間段差部７３と、内径側環状部７４とを有している。
弾性体７５は、芯金７１の外径側環状部７２の外周部を覆う固定部７６と、芯金７１の外径側環状部７２、中間段差部７３及び内径側環状部７４の外側面を覆う被覆層７７と、この被覆層７７の内径端部から回転軸４０の中間軸部４０ａの外周面に摺接可能に二股状に突出されたリップ７８、７９とを有している。
そして、シール部材７０は、固定部７６が環状溝５８ｂに弾性圧縮された状態で嵌込まれることによって、外輪５１の環状溝５８ｂに固定される。 The seal member 70 includes a cored bar 71 formed by pressing a metal plate and an elastic body 75 formed of rubber, soft resin, or the like.
The cored bar 71 has an outer diameter side annular portion 72, an intermediate stepped portion 73, and an inner diameter side annular portion 74.
The elastic body 75 includes a fixing portion 76 that covers the outer peripheral portion of the outer diameter side annular portion 72 of the core metal 71, and outer surfaces of the outer diameter side annular portion 72, the intermediate stepped portion 73, and the inner diameter side annular portion 74 of the core metal 71. The covering layer 77 includes a covering layer 77, and lips 78 and 79 projecting in a bifurcated manner so as to be slidable from the inner diameter end portion of the covering layer 77 to the outer peripheral surface of the intermediate shaft portion 40a of the rotary shaft 40.
The seal member 70 is fixed to the annular groove 58b of the outer ring 51 by fitting the fixing portion 76 in an elastically compressed state in the annular groove 58b.

また、外輪５１の内周面の他端開口部には、前記シール部材７０と同様に構成されるシール部材８０が組み付けられる。   A seal member 80 configured in the same manner as the seal member 70 is assembled to the other end opening of the inner peripheral surface of the outer ring 51.

図３に示すように、複数の転動体としてのころ５５を転動可能に保持する保持器６０は、軸方向に所定間隔を隔てる両環状部６１、６２と、これら両環状部６１、６２を連結しかつ複数のころ５５をそれぞれ保持するポケット６３を区画形成する複数の柱部６４とを一体に備えている。
また、図３と図４に示すように、保持器６０は、ガラス繊維等の強化繊維６６が混合された合成樹脂によって形成される。これによって、保持器６０は、その表面から０．２ｍｍ程度の厚さｔで樹脂成分が多い樹脂リッチ層６５が形成される。
保持器６０の少なくともシール部材７０の芯金７１の外径側環状部７２の内側面に対向する側の環状部６１側面の樹脂リッチ層６５の表面には、フッ素系樹脂、ポリアミド系樹脂等の耐熱性、耐摩耗性を有するコーティング層６８が施されている。なお、保持器６０の表面全体をコーティング層６８で覆ってもよい。 As shown in FIG. 3, the cage 60 that holds the rollers 55 as a plurality of rolling elements in a rollable manner includes both annular portions 61 and 62 that are spaced apart from each other in the axial direction, and these annular portions 61 and 62. A plurality of column portions 64 that integrally form pockets 63 that respectively connect and hold the plurality of rollers 55 are integrally provided.
As shown in FIGS. 3 and 4, the cage 60 is formed of a synthetic resin mixed with reinforcing fibers 66 such as glass fibers. As a result, the cage 60 is formed with a resin rich layer 65 having a thickness t of about 0.2 mm and a large amount of resin components from the surface thereof.
At least the surface of the resin rich layer 65 on the side of the annular portion 61 on the side facing the inner surface of the outer diameter side annular portion 72 of the core 71 of the seal member 70 of the cage 60 is made of fluorine resin, polyamide resin, or the like. A coating layer 68 having heat resistance and wear resistance is applied. Note that the entire surface of the cage 60 may be covered with the coating layer 68.

上述したように構成されるこの実施例１に係る水ポンプ用軸受装置において、転動体としてのころ５５のスキュー力（軸方向の荷重）が保持器６０に作用して保持器６０がシール部材７０に向けて移動されることがある（図４に二点差線参照）。
この場合、保持器６０の側面のコーティング層６８がシール部材７０に接触する。
この際、コーティング層７０の接触部分がコーティング層６８よりも硬い芯金７１の外径側環状部７２の内側面の部分であると、保持器６０コーティング層６８が摩耗されることがあるが、保持器６０に混合の強化繊維６６の一部が保持器６０の側面から露出することがないため、芯金７１の摩耗を防止することができる。 In the water pump bearing device according to the first embodiment configured as described above, the skew force (load in the axial direction) of the roller 55 as the rolling element acts on the cage 60, so that the cage 60 is sealed. (Refer to the two-dot chain line in FIG. 4).
In this case, the coating layer 68 on the side surface of the cage 60 contacts the seal member 70.
At this time, if the contact portion of the coating layer 70 is a portion of the inner side surface of the outer diameter side annular portion 72 of the core metal 71 harder than the coating layer 68, the cage 60 coating layer 68 may be worn. Since a part of the reinforcing fiber 66 mixed with the cage 60 is not exposed from the side surface of the cage 60, the wear of the cored bar 71 can be prevented.

すなわち、保持器６０の側面のコーティング層６８が全て摩耗された後、さらに、保持器６０の側面の樹脂リッチ層６５が全て摩耗される間においては、保持器６０の側面から強化繊維６６が露出することがない。
このため、保持器６０の側面から露出する強化繊維６６が原因となるシール部材７０の芯金７１の摩耗を抑制することができ、耐久性の向上を図ることができる。
また、フッ素系樹脂、ポリアミド系樹脂等の耐熱性、耐摩耗性を有する樹脂によってコーティング層６８が形成されることで、コーティング層６８の摩耗を低減することができ、この分だけ、保持器６０の側面から強化繊維が露出することをより一層良好に抑制することができる。 That is, after all of the coating layer 68 on the side surface of the cage 60 is worn, and further during which all of the resin rich layer 65 on the side surface of the cage 60 is worn, the reinforcing fibers 66 are exposed from the side surface of the cage 60. There is nothing to do.
For this reason, abrasion of the cored bar 71 of the sealing member 70 caused by the reinforcing fibers 66 exposed from the side surface of the cage 60 can be suppressed, and durability can be improved.
Further, since the coating layer 68 is formed of a heat-resistant and wear-resistant resin such as a fluorine-based resin or a polyamide-based resin, the wear of the coating layer 68 can be reduced. It can suppress even more satisfactorily that a reinforced fiber is exposed from the side surface.

強化繊維６６が混合された合成樹脂によって形成される保持器において、この実施例１のコーティング層６８が施された保持器６０と、コーティング層６８がない従来の保持器を用いてシール部材７０の芯金７１の摩耗試験を行った結果、図５に示すような結果が得られた。
図５から明らかなように、コーティング層６８が施された保持器６０を用いたこの実施例１においては、コーティング層６８がない従来の保持器を用いた場合と比較して、シール部材７０の芯金７１の摩耗開始時期を、コーティング層６８が摩耗される時間だけ遅くすることができ、この分だけシール部材７０の耐久性の向上を図ることが可能となった。 In the cage formed of the synthetic resin mixed with the reinforcing fibers 66, the cage 60 provided with the coating layer 68 of Example 1 and the conventional cage without the coating layer 68 are used. As a result of conducting a wear test of the cored bar 71, the result shown in FIG. 5 was obtained.
As apparent from FIG. 5, in this Example 1 using the retainer 60 provided with the coating layer 68, the seal member 70 was compared with the case where the conventional retainer without the coating layer 68 was used. The start of wear of the cored bar 71 can be delayed by the time that the coating layer 68 is worn, and the durability of the seal member 70 can be improved by this amount.

なお、この発明は前記実施例１に限定するものではなく、この発明の要旨を逸脱しない範囲内において、種々の形態で実施することができる。   In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can implement with a various form.

１０ ハウジング
４０ 回転軸
４１ 内輪軌道面
５０ 転がり軸受
５１ 外輪
５２ 外輪軌道面
５５ ころ（転動体）
６０ 保持器
６５ 樹脂リッチ層
６８ コーティング層
７０ シール部材
７１ 芯金
７５ 弾性体
７８、７９ リップ DESCRIPTION OF SYMBOLS 10 Housing 40 Rotating shaft 41 Inner ring raceway surface 50 Rolling bearing 51 Outer ring 52 Outer ring raceway surface 55 Roller (rolling element)
60 Cage 65 Resin Rich Layer 68 Coating Layer 70 Sealing Member 71 Core Bar 75 Elastic Body 78, 79 Lip

Claims (2)

水ポンプの回転軸をハウジングに回転可能に支持する転がり軸受と、この転がり軸受の外輪の一端部内周面と前記回転軸の外周面との間に配設されて前記転がり軸受内を密封するシール部材とを備えた水ポンプ用軸受装置であって、
前記転がり軸受の複数の転動体を転動可能に保持する保持器は、強化繊維が混合された合成樹脂によって形成され、
前記保持器の少なくとも前記シール部材に対向する側面にはコーティング層が施されていることを特徴とする水ポンプ用軸受装置。 A rolling bearing that rotatably supports a rotating shaft of a water pump on a housing, and a seal that is disposed between an inner peripheral surface of one end of an outer ring of the rolling bearing and an outer peripheral surface of the rotating shaft to seal the inside of the rolling bearing A bearing device for a water pump comprising a member,
The cage that holds the plurality of rolling elements of the rolling bearing in a rollable manner is formed of a synthetic resin mixed with reinforcing fibers,
A bearing device for a water pump, wherein a coating layer is applied to at least a side surface of the cage facing the seal member. 請求項１に記載の水ポンプ用軸受装置であって、
コーティング層は、フッ素系樹脂、ポリアミド系樹脂等の耐熱性、耐摩耗性を有する樹脂によって形成されていることを特徴とする水ポンプ用軸受装置。 The water pump bearing device according to claim 1,
The water pump bearing device, wherein the coating layer is formed of a heat-resistant and wear-resistant resin such as a fluorine-based resin or a polyamide-based resin.
JP2011113328A 2011-05-20 2011-05-20 Bearing device for water pump Withdrawn JP2012241819A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10975817B2 (en) 2018-04-26 2021-04-13 Toyota Jidosha Kabushiki Kaisha Protector and method for manufacturing protector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10975817B2 (en) 2018-04-26 2021-04-13 Toyota Jidosha Kabushiki Kaisha Protector and method for manufacturing protector

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