JP2006112457A - Water pump bearing - Google Patents

Water pump bearing Download PDF

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JP2006112457A
JP2006112457A JP2004297832A JP2004297832A JP2006112457A JP 2006112457 A JP2006112457 A JP 2006112457A JP 2004297832 A JP2004297832 A JP 2004297832A JP 2004297832 A JP2004297832 A JP 2004297832A JP 2006112457 A JP2006112457 A JP 2006112457A
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end side
roller
outer ring
water pump
ball
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Tomoya Ichikawa
智也 市川
Satoru Niiyama
知 新山
Shinichiro Asae
真一郎 淺枝
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water pump bearing having long lubrication service life by a simple structure without increasing costs. <P>SOLUTION: This water pump bearing comprises a roller row and a ball row. An annular stepped part is provided on either one of the peripheral surface of a rotary shaft or inner peripheral surface of an outer ring, the axial movement of a roller retainer retaining rollers is restricted to a predetermined value between an end side enclosed sealing and the annular stepped part, and an axial space is formed between the rollers and the balls and made to serve as a grease sealing space. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、自動車のエンジン冷却水を循環させるための水ポンプ軸受に関する。   The present invention relates to a water pump bearing for circulating engine cooling water of an automobile.

まず、ここでは、水ポンプ軸受に関する説明をする上で、先端側は、駆動プーリの取付け固定側を指し、後端側をインペラ固定側を指すものと定義しておく。   First, in the description of the water pump bearing, the front end side is defined as the drive pulley mounting and fixing side, and the rear end side is defined as the impeller fixing side.

従来、水ポンプ軸受は、内方に複列の内周軌道を有する外輪と、外輪の前記内周軌道に対向する複列の外周軌道を有し、前記外輪の両端部より軸方向外方に突き出た先端側延長部と後端側延長部とを有する回転軸と、外輪の内周軌道と回転軸の外周軌道との間に介装される複列の転動体と、前記転動体を保持する保持器と、外輪と回転軸との空間を密封する密封シールとからなる構造である。   Conventionally, the water pump bearing has an outer ring having a double row inner raceway on the inner side and a double row outer raceway facing the inner raceway of the outer ring, and is axially outward from both ends of the outer ring. A rotating shaft having a protruding front end side extension portion and a rear end side extension portion, a double row rolling element interposed between an inner circumferential track of the outer ring and an outer circumferential track of the rotating shaft, and holding the rolling body And a hermetic seal that seals a space between the outer ring and the rotating shaft.

実際に、車両のエンジンに取付けられる場合には、外輪をハウジング(図示略)に固定し、回転軸の先端側延長部にプーリシート(図示略)を圧入し、さらに、そのプーリシートに駆動用プーリを固定して、水ポンプ軸受を回転する。また、回転軸の先端側延長部に直接駆動プーリを圧入固定する場合もある。   Actually, when mounted on the engine of a vehicle, the outer ring is fixed to a housing (not shown), a pulley seat (not shown) is press-fitted into the distal end extension portion of the rotating shaft, and the pulley seat is driven. Fix the pulley and rotate the water pump bearing. In some cases, the driving pulley may be directly press-fitted and fixed to the distal end side extension of the rotating shaft.

回転軸の後端側延長部には、インペラ(図示略)と該インペラと外輪の間にはメカニカルシール(図示略)が組みつけられる。   An impeller (not shown) and a mechanical seal (not shown) are assembled between the impeller and the outer ring on the rear end extension of the rotating shaft.

水ポンプ軸受の回転軸先端側の転動体列に作用する荷重が大きい場合に、負荷容量を大きくして高耐久型にする必要があり、転動体として、回転軸先端側の列に、ローラを使用する。   When the load acting on the rolling element row on the rotating shaft tip side of the water pump bearing is large, it is necessary to increase the load capacity to make it a highly durable type. use.

図３に示す従来の水ポンプ軸受Ｗｐｚは、外輪１ｚと回転軸２ｚとの間に、複列の転動体を介装させ、先端側にローラ３１ｚを、後端側にボール３２ｚを配列している形式を示している。この形式はローラ＆ボール形式と呼ばれている。   The conventional water pump bearing Wpz shown in FIG. 3 has a double row rolling element interposed between an outer ring 1z and a rotating shaft 2z, and a roller 31z is arranged on the front end side and a ball 32z is arranged on the rear end side. Shows the format. This format is called the roller & ball format.

ローラ３１ｚはローラ保持器４１ｚにより、ボール３２ｚはボール保持器４２ｚにより保持されている。   The roller 31z is held by a roller holder 41z, and the ball 32z is held by a ball holder 42z.

外輪１ｚの両端部には、外輪１ｚと回転軸２ｚの間を密封するために、先端側密封シール５１ｚと後端側密封シール５２ｚが設けられている。   A front end side sealing seal 51z and a rear end side sealing seal 52z are provided at both ends of the outer ring 1z in order to seal between the outer ring 1z and the rotary shaft 2z.

水ポンプ軸受の寿命は、軸受材料の疲労寿命よりも潤滑寿命で決まる場合が多くあり、そのため、漏れの生じない範囲でできるだけ多くのグリースを充填させることが必要になってきている。   The life of a water pump bearing is often determined by the lubrication life rather than the fatigue life of the bearing material. Therefore, it is necessary to fill as much grease as possible without causing leakage.

ローラ＆ボール形式の軸受では、通常、回転中、ローラ保持器はローラを保持した状態で軸方向に移動をしてしまうので、この移動を防止するために、図３に示すように、ボール列とローラ保持器４１ｚの間に、フローティング式の間座５ｚを挿入している。そうすると、ボール３２ｚと間座５ｚと先端側密封シール５１ｚの背面部５１１ｚとでローラ保持器４１ｚの軸方向の動きを規制できる構造になる。しかし、間座５ｚがあるために、ローラ３１ｚとボール３２ｚを潤滑するグリースＧｚをローラ３１ｚの周囲およびボール３２ｚの周囲に加えて、補助的に充填する空間Ｓｚが狭くなってしまい、十分なグリースＧｚの充填ができないので、潤滑寿命を長くすることができない虞がある。ローラ＆ボール形式の潤滑を改善する構造に関して提案がある(特開２００１-１３２７５９号公報参照)。
特開２００１-１３２７５９号公報 In the roller & ball type bearing, the roller cage usually moves in the axial direction while holding the roller during rotation. To prevent this movement, as shown in FIG. A floating spacer 5z is inserted between the roller holder 41z. If it does so, it will become the structure which can control the motion of the axial direction of the roller holder | retainer 41z with the ball | bowl 32z, the spacer 5z, and the back part 511z of the front end side seal 51z. However, due to the presence of the spacer 5z, the space Sz that is supplementarily filled with the grease Gz that lubricates the roller 31z and the ball 32z around the roller 31z and the periphery of the ball 32z is narrowed, so that sufficient grease is obtained. Since Gz cannot be filled, there is a possibility that the lubrication life cannot be extended. There is a proposal regarding a structure for improving the lubrication of the roller and ball type (see Japanese Patent Application Laid-Open No. 2001-132759).
JP 2001-132759 A

しかしながら、特許文献１は、複列の転動体の間に、潤滑剤の溜り部を有するフロートリングを配設しているので、効果は期待できるもののフロートリングの分だけコストアップになる。   However, since the float ring which has the reservoir part of a lubricant is arrange | positioned between the rolling elements of a double row | line in patent document 1, although an effect can be anticipated, it will increase in cost by the part of the float ring.

本発明は、このような点に鑑みなされたもので、本発明は、コストアップにならない簡単な構造で、潤滑寿命の長い水ポンプ軸受を提供することを目的としている。   The present invention has been made in view of these points, and an object of the present invention is to provide a water pump bearing having a simple lubrication life and a long lubrication life.

上記の目的を達成するため、本発明は、
先端側に円筒形状の内周軌道と後端側に円弧形状の内周軌道とを有する外輪と、
前記外輪の内周軌道に対向する円筒形状および円弧形状の外周軌道をそれぞれ先端側ならびに後端側に有し、前記外輪の両端部より先端側および後端側に、それぞれ突き出た延長部を有する回転軸と、
前記円筒形状の内周軌道と前記円筒形状の外周軌道との間に介装されたローラと、
前記円弧形状の内周軌道と前記円弧形状の外周軌道との間に介装されたボールと、
前記ローラを保持するローラ保持器と、
前記ボールを保持するボール保持器と、
前記外輪の両端部に設けられ、前記外輪と前記回転軸との間を密封する先端側密封シールおよび後端側密封シールと、
からなる水ポンプ軸受において、
前記回転軸の外周面若しくは外輪の内周面のいずれか一方に環状段部を設け、前記ローラを保持している前記ローラ保持器の軸方向の動きを前記先端側密封シールと前記環状段部との間で所定値に制限して前記ローラと前記ボールとの間に軸方向空間を形成すると共に、前記軸方向空間をグリース封入空間としたことを特徴とする水ポンプ軸受を提供する。 In order to achieve the above object, the present invention provides:
An outer ring having a cylindrical inner circumferential track on the front end side and an arc-shaped inner circumferential track on the rear end side;
Cylindrical and arc-shaped outer peripheral tracks opposed to the inner peripheral track of the outer ring are provided on the front end side and the rear end side, respectively, and extended portions projecting from the both ends of the outer ring on the front end side and rear end side, respectively A rotation axis;
A roller interposed between the cylindrical inner circumferential track and the cylindrical outer circumferential track,
A ball interposed between the arc-shaped inner circumferential track and the arc-shaped outer circumferential track,
A roller holder for holding the roller;
A ball holder for holding the ball;
A front-end side sealing seal and a rear-end side sealing seal that are provided at both ends of the outer ring and seal between the outer ring and the rotary shaft;
Water pump bearing consisting of
An annular step is provided on either the outer peripheral surface of the rotating shaft or the inner peripheral surface of the outer ring, and the axial movement of the roller retainer holding the roller is controlled by the tip side seal and the annular step. A water pump bearing is provided in which an axial space is formed between the roller and the ball with a predetermined value therebetween, and the axial space is a grease-filled space.

また、
前記環状段部は前記回転軸の外周部に一体に設けられた段部であることが望ましい。 Also,
The annular step portion is preferably a step portion provided integrally with the outer peripheral portion of the rotating shaft.

本発明によれば、コストアップにならない簡単な構造で、潤滑寿命の長い水ポンプ軸受を提供する事が出来る。   According to the present invention, it is possible to provide a water pump bearing having a simple lubrication life and a long lubrication life.

以下、本発明の水ポンプ軸受に係わる実施形態を図面を参照しつつ説明する。   Hereinafter, embodiments of the water pump bearing of the present invention will be described with reference to the drawings.

実施形態の説明中、先端側とあるは、図中Ａ方向を指し、後端側とあるは、図中Ｂ方向を指すように定義する。   In the description of the embodiments, the front end side is defined to refer to the A direction in the figure, and the rear end side is defined to refer to the B direction in the figure.

（実施形態１）
図１は本発明の実施形態１の半断面図である。 (Embodiment 1)
FIG. 1 is a half sectional view of Embodiment 1 of the present invention.

同図において、実施形態１の水ポンプ軸受Ｗｐは、内周面に複列の内周軌道１ａ、１ｂを有する外輪１と、外輪１の内周軌道１ａ、１ｂに対向する複列の外周軌道２ａ、２ｂを外周面に有し、外輪１の両端部より先端側および後端側に突き出た延長部２１，２２を有する回転軸２と、外輪１と回転軸２との間に介装されている転動体３１、３２と、転動体３１、３２を保持する保持器４１、４２と、外輪１の両端部において、外輪１と回転軸２との間を密封する密封シール５１，５２とから構成されている。複列の転動体間には空間部Ｓがあり、空間部ＳにはグリースＧが充填されている。   In the same figure, the water pump bearing Wp of Embodiment 1 includes an outer ring 1 having double-row inner circumferential tracks 1a and 1b on the inner circumferential surface, and a double-row outer circumferential track facing the inner circumferential tracks 1a and 1b of the outer ring 1. 2a and 2b on the outer peripheral surface, and interposed between the outer ring 1 and the rotating shaft 2 with the rotating shaft 2 having the extension portions 21 and 22 protruding from the both ends of the outer ring 1 to the front end side and the rear end side. Rolling elements 31, 32, retainers 41, 42 for holding the rolling elements 31, 32, and sealing seals 51, 52 for sealing between the outer ring 1 and the rotating shaft 2 at both ends of the outer ring 1. It is configured. There is a space S between the double row rolling elements, and the space S is filled with grease G.

外輪１は、内周面に円筒状内周軌道１ａ(図中、右側)と、円筒状内周軌道１ａとは軸方向に離隔した位置に円弧凹状内周軌道１ｂ(図中、左側)を有する中空の円筒体である。両端部内周に、後述するシールを固定するシール溝１１，１２を有している。   The outer ring 1 has a cylindrical inner circumferential track 1a (right side in the figure) on the inner circumferential surface and an arc concave inner circumferential track 1b (left side in the figure) at a position axially separated from the cylindrical inner circumferential track 1a. It is a hollow cylindrical body. Seal grooves 11 and 12 for fixing a seal to be described later are provided on the inner periphery of both ends.

回転軸２は、外輪１の円筒状内周軌道１ａに対向する円筒状外周軌道２ａを先端側に有し、円筒状外周軌道２ａに連設されて、外周軌道２ａよりもやや大径の円筒部２３と、円筒部２３の軸方向後端側の所定位置に、外輪円弧凹状内周軌道１ｂに対向して円弧凹状外周軌道２ｂを形成している。大径の円筒部２３は環状段部２４を形成している。軸方向先端側と後端側には先端側延長部２１と後端側延長部２２とをそれぞれ有している。先端側延長部２１は外周軌道２ａと同一の直径である。後端側延長部２２は大径の円筒部２３と同一の直径である。   The rotating shaft 2 has a cylindrical outer peripheral track 2a facing the cylindrical inner peripheral track 1a of the outer ring 1 on the distal end side. The rotary shaft 2 is connected to the cylindrical outer peripheral track 2a and has a slightly larger diameter than the outer peripheral track 2a. An arc concave outer peripheral track 2b is formed at a predetermined position on the axially rear end side of the portion 23 and the cylindrical portion 23 so as to face the outer ring arc concave inner peripheral track 1b. The large-diameter cylindrical portion 23 forms an annular step portion 24. A front end side extension portion 21 and a rear end side extension portion 22 are respectively provided on the front end side and the rear end side in the axial direction. The distal end extension 21 has the same diameter as that of the outer circumferential track 2a. The rear end side extension portion 22 has the same diameter as the large diameter cylindrical portion 23.

転動体は、先端側は複数のローラ３１からなってローラ列を形成しており、後端側は複数のボール３２からなってボール列を形成している。   The rolling element includes a plurality of rollers 31 on the front end side to form a roller row, and the rear end side includes a plurality of balls 32 to form a ball row.

保持器は、先端側は、ローラ保持器４１である。後端側は、ボール保持器４２である。ローラ保持器４１は、略円筒形であり、両端部は平面４１１，４１２になっている。後述するように、ポケット４１３にローラ３１を収容して、使用状態になったとき、ローラ３１とローラ保持器４１が軸方向に移動したとき、先端側ではローラ保持器の平面４１１と密封シール５１の背面５１１が接触する。後端側では、ローラ保持器４１の平面４１２と回転軸２の大径の円筒部２３からなる環状段部２４が接触する。その結果、ローラ保持器４１の軸方向の移動量が、所定値に抑えられる。   The retainer is a roller retainer 41 on the tip side. The rear end side is a ball holder 42. The roller retainer 41 has a substantially cylindrical shape, and both end portions are flat surfaces 411 and 412. As will be described later, when the roller 31 is accommodated in the pocket 413 and is in use, when the roller 31 and the roller holder 41 move in the axial direction, the roller holder plane 411 and the sealing seal 51 are formed on the tip side. The back surface 511 of the contact. On the rear end side, the flat surface 412 of the roller holder 41 and the annular step portion 24 formed by the large-diameter cylindrical portion 23 of the rotating shaft 2 are in contact. As a result, the movement amount of the roller holder 41 in the axial direction is suppressed to a predetermined value.

ボール列側へローラ保持器４１の軸方向の移動量が所定の範囲に制限されるので、補助用グリースを充填する空間Ｓが充分に確保できる。   Since the amount of movement of the roller cage 41 in the axial direction toward the ball row side is limited to a predetermined range, a sufficient space S for filling the auxiliary grease can be secured.

ボール保持器４２は、鋼板製プレス加工された冠型保持器または樹脂成型された保持器である。   The ball cage 42 is a steel plate press-worked crown type cage or a resin molded cage.

密封シール５１，５２は外輪の両端部に形成されたシール溝１１，１２にそれぞれ固定されている。先端側密封シール５１の背面５１１はシール溝に固定された状態ではローラ保持器４１の平面４１２と接触して軸方向の移動を制限する。   The seal seals 51 and 52 are fixed to seal grooves 11 and 12 formed at both ends of the outer ring, respectively. The back surface 511 of the front end side seal 51 is in contact with the flat surface 412 of the roller retainer 41 in a state where it is fixed in the seal groove, thereby restricting the movement in the axial direction.

ローラ列とボール列にはそれぞれグリースが充填されているが、ローラ列およびボール列の空間Ｓ側にも補助用のグリースＧが充填されている。補助用に充填されるグリースＧは、使用中、振動や、温度上昇などによって、グリース中の基油(油分)が、徐々に離油して、ローラ列およびボール列の潤滑に寄与する。その結果、潤滑寿命が長い水ポンプ軸受が得られる。   The roller row and the ball row are filled with grease, but the auxiliary grease G is also filled on the space S side of the roller row and the ball row. In use, the grease G filled for auxiliary use causes the base oil (oil component) in the grease to gradually release due to vibration, temperature rise, etc., and contributes to lubrication of the roller train and ball train. As a result, a water pump bearing having a long lubrication life is obtained.

(実施形態２)
次に、実施形態２を図２を参照しながら説明する。
同図において、外輪１の内周面の所定位置に環状溝１３が形成され、環状溝１３に合成樹脂製のストップリング６が嵌着固定されている。 (Embodiment 2)
Next, Embodiment 2 will be described with reference to FIG.
In the figure, an annular groove 13 is formed at a predetermined position on the inner peripheral surface of the outer ring 1, and a stop ring 6 made of synthetic resin is fitted and fixed to the annular groove 13.

回転軸２は、無段の円筒状外周面２５をなし、この円筒状外周面２５の一部分がローラ３１に対する外周軌道面２ａとなっている。後端側に円弧凹状外周軌道２ｂが形成されている。
外輪両端部には密封シール５１，５２が固定されている。 The rotating shaft 2 has a stepless cylindrical outer peripheral surface 25, and a part of the cylindrical outer peripheral surface 25 is an outer peripheral raceway surface 2 a for the roller 31. An arc concave outer peripheral track 2b is formed on the rear end side.
Sealing seals 51 and 52 are fixed to both ends of the outer ring.

ローラ３１をポケット４１３に収容しているローラ保持器４１が軸方向に移動する場合、一方では密封シール５１の背面５１１との間で移動量が制限され、他方ではストップリング１３とローラ保持器４１の平面４１２とが接触して移動量が制限される。本実施形態ではストップリング６が環状段部として作用している。   When the roller holder 41 containing the roller 31 in the pocket 413 moves in the axial direction, the movement amount is limited on the one hand to the back surface 511 of the sealing seal 51, and on the other hand, the stop ring 13 and the roller holder 41 are moved. The amount of movement is limited by contact with the flat surface 412. In the present embodiment, the stop ring 6 acts as an annular step.

本実施形態では、外輪内周面にストップリング用の環状溝１３を形成し、回転軸２は、無段の円筒状にしている。回転軸２は外輪１に比べて、曲げ荷重が作用するので、できるだけ溝など応力集中する形状は避けて、環状溝１３のような溝を設ける場合は、本実施例のように、外輪１に設けるのが望ましい。   In the present embodiment, an annular groove 13 for a stop ring is formed on the inner peripheral surface of the outer ring, and the rotary shaft 2 has a stepless cylindrical shape. Since the rotating shaft 2 is subjected to a bending load as compared with the outer ring 1, avoiding a shape such as a groove where stress is concentrated as much as possible. When providing a groove such as the annular groove 13, the outer ring 1 is provided on the outer ring 1 as in this embodiment. It is desirable to provide it.

なお、実施形態１と同一部位、同一符号については既に説明済であるから、重複する説明を省略する。   In addition, since it has already demonstrated about the same site | part and the same code | symbol as Embodiment 1, the overlapping description is abbreviate | omitted.

本発明の実施形態１を示す半断面図である。It is a half sectional view showing Embodiment 1 of the present invention. 本発明の実施形態２を示す半断面図である。It is a half sectional view showing Embodiment 2 of the present invention. 従来技術を示す半断面図である。It is a half sectional view showing a prior art.

符号の説明Explanation of symbols

Ｗｐ：水ポンプ軸受
１:外輪
１ａ：円筒状内周軌道
１ｂ：円弧凹状内周軌道
１１，１２:密封シール溝
２:回転軸
２ａ：円筒状外周軌道
２ｂ：円弧凹状外周軌道
２１，２２:延長部
２３：大径部
２４:環状段部
３１：円筒ころ
３２：ボール
４１：円筒ころ用保持器
４１１，４１２：平面
４２：ボール用保持器
５１:先端側密封シール
５１１:背面部
５２:後端側密封シール
６:ストップリング
Ｇ:グリース
Ｓ：空間 Wp: water pump bearing 1: outer ring 1a: cylindrical inner peripheral track 1b: arc concave inner peripheral track 11, 12: sealing seal groove 2: rotating shaft 2a: cylindrical outer peripheral track 2b: arc concave outer peripheral track 21, 22: extension Part 23: Large diameter part 24: Annular step part 31: Cylindrical roller 32: Ball 41: Cylindrical roller cage 411, 412: Plane 42: Ball cage 51: Front side sealing seal 511: Back part 52: Rear end Side seal 6: Stop ring G: Grease S: Space

Claims (2)

先端側に円筒形状の内周軌道と後端側に円弧形状の内周軌道とを有する外輪と、
前記外輪の内周軌道に対向する円筒形状および円弧形状の外周軌道をそれぞれ先端側ならびに後端側に有し、前記外輪の両端部より先端側および後端側に、それぞれ突き出た延長部を有する回転軸と、
前記円筒形状の内周軌道と前記円筒形状の外周軌道との間に介装されたローラと、
前記円弧形状の内周軌道と前記円弧形状の外周軌道との間に介装されたボールと、
前記ローラを保持するローラ保持器と、
前記ボールを保持するボール保持器と、
前記外輪の両端部に設けられ、前記外輪と前記回転軸との間を密封する先端側密封シールおよび後端側密封シールと、
からなる水ポンプ軸受において、
前記回転軸の外周面若しくは外輪の内周面のいずれか一方に環状段部を設け、前記ローラを保持している前記ローラ保持器の軸方向の動きを前記先端側密封シールと前記環状段部との間で所定値に制限して前記ローラと前記ボールとの間に軸方向空間を形成すると共に、前記軸方向空間をグリース封入空間としたことを特徴とする水ポンプ軸受。 An outer ring having a cylindrical inner circumferential track on the front end side and an arc-shaped inner circumferential track on the rear end side;
Cylindrical and arc-shaped outer peripheral tracks opposed to the inner peripheral track of the outer ring are provided on the front end side and the rear end side, respectively, and extended portions projecting from the both ends of the outer ring on the front end side and rear end side, respectively A rotation axis;
A roller interposed between the cylindrical inner circumferential track and the cylindrical outer circumferential track,
A ball interposed between the arc-shaped inner circumferential track and the arc-shaped outer circumferential track,
A roller holder for holding the roller;
A ball holder for holding the ball;
A front-end side sealing seal and a rear-end side sealing seal that are provided at both ends of the outer ring and seal between the outer ring and the rotary shaft;
Water pump bearing consisting of
An annular step is provided on either the outer peripheral surface of the rotating shaft or the inner peripheral surface of the outer ring, and the axial movement of the roller retainer holding the roller is controlled by the tip side seal and the annular step. A water pump bearing characterized in that an axial space is formed between the roller and the ball with a predetermined value therebetween, and the axial space is a grease-filled space. 前記環状段部は前記回転軸の外周部に一体に設けられた段部であることを特徴とする請求項１に記載の水ポンプ軸受。   The water pump bearing according to claim 1, wherein the annular step portion is a step portion provided integrally with an outer peripheral portion of the rotating shaft.
JP2004297832A 2004-10-12 2004-10-12 Water pump bearing Withdrawn JP2006112457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
JP2006112457A true JP2006112457A (en) 2006-04-27

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Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009047310A (en) * 2007-08-21 2009-03-05 Truetzschler Gmbh & Co Kg Device on draw frame having drafting system for textile fiber sliver
JP2011144921A (en) * 2009-12-17 2011-07-28 Jtekt Corp Bearing device
CN110030208A (en) * 2019-03-27 2019-07-19 盐城海纳汽车零部件有限公司 A kind of cooling water pump for automobile engine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009047310A (en) * 2007-08-21 2009-03-05 Truetzschler Gmbh & Co Kg Device on draw frame having drafting system for textile fiber sliver
JP2011144921A (en) * 2009-12-17 2011-07-28 Jtekt Corp Bearing device
US8851758B2 (en) 2009-12-17 2014-10-07 Jtekt Corporation Bearing device
CN110030208A (en) * 2019-03-27 2019-07-19 盐城海纳汽车零部件有限公司 A kind of cooling water pump for automobile engine

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