JP2006144810A - Ball bearing device - Google Patents

Ball bearing device Download PDF

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JP2006144810A
JP2006144810A JP2004331432A JP2004331432A JP2006144810A JP 2006144810 A JP2006144810 A JP 2006144810A JP 2004331432 A JP2004331432 A JP 2004331432A JP 2004331432 A JP2004331432 A JP 2004331432A JP 2006144810 A JP2006144810 A JP 2006144810A
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oil
bearing device
ball bearing
foreign matter
shield plate
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Japanese (ja)
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Tokuji Kamimura
篤司 上村
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JTEKT Corp
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JTEKT Corp
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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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • 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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6659—Details of supply of the liquid to the bearing, e.g. passages or nozzles
    • F16C33/6666—Details of supply of the liquid to the bearing, e.g. passages or nozzles from an oil bath in the bearing housing, e.g. by an oil ring or centrifugal disc
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/61—Toothed gear systems, e.g. support of pinion shafts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball bearing device possible to be reduced in torque in comparison with a tapered roller bearing and capable of preventing damage due to intrusion of foreign materials such as abrasion chips in the case of using in the oil bath condition. <P>SOLUTION: A oil bath side end of a rotating ring 4 is provided with a shield plate 22 having a cylindrical part 22a fitted in the rotating ring 4 and a flange part 22b continued to an axial directional end of the cylindrical part 22a. The flange part 22b is provided with an oil supply hole 21 for introducing oil into the bearing. The peripheral edge of the flange part 22b is provided with a folding part 22c forming an oil reservoir part 23 opened inward in the radial direction. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

この発明は、玉軸受装置に関し、さらに詳しくは、自動車のディファレンシャル、トランスファー、トランスミッションなどにおいて油浴状態でピニオン軸やギア軸を支持するのに好適な玉軸受装置に関する。   The present invention relates to a ball bearing device, and more particularly to a ball bearing device suitable for supporting a pinion shaft and a gear shaft in an oil bath state in a differential, a transfer, a transmission and the like of an automobile.

自動車のディファレンシャル部分に配されてピニオン軸を回転自在に支持する軸受装置として、円すいころ軸受を使用したものが知られている（特許文献１）。
特開平８−２１０４７１号公報 A bearing device using a tapered roller bearing is known as a bearing device that is arranged in a differential part of an automobile and rotatably supports a pinion shaft (Patent Document 1).
JP-A-8-210471

ディファレンシャルで使用されている転がり軸受は、高い剛性を得るために従来は円すいころ軸受とされていたが、燃費向上の観点から軸受の低トルク化が課題となっており、円すいころ軸受より回転トルクが小さい玉軸受を使用することが望まれている。   Rolling bearings used in differentials have traditionally been tapered roller bearings in order to obtain high rigidity. However, from the viewpoint of improving fuel efficiency, lowering the torque of bearings has become an issue. However, it is desired to use a ball bearing having a small diameter.

玉軸受を使用するに際しては、円すいころ軸受に比べて、同サイズでは負荷容量が小さくなる分、摩耗粉、切り粉などによる損傷が起きやすいことから、低トルクを維持したまま、潤滑油に混ざった異物が軸受内に侵入することを防止することが課題となる。   When using ball bearings, the load capacity is smaller than that of tapered roller bearings, and damage due to wear and cutting powder is likely to occur. It is a problem to prevent foreign matter from entering the bearing.

この発明の目的は、円すいころ軸受に比べて低トルク化が可能であり、しかも、油浴状態で使用される場合の摩耗粉等の異物侵入による損傷を防止することができる玉軸受装置を提供することにある。   An object of the present invention is to provide a ball bearing device capable of reducing torque compared to a tapered roller bearing and capable of preventing damage caused by foreign matter such as wear powder when used in an oil bath. There is to do.

この発明による玉軸受装置は、固定輪、回転輪、および両輪間に配置された玉を有し、一端が油浴側に位置するように使用される玉軸受装置において、回転輪の油浴側端部に、回転輪に嵌め合わせられた円筒部および円筒部の軸方向端部に連なるフランジ部を有するシールド板が設けられており、シールド板のフランジ部に、軸受内に油を導入する給油孔が設けられていることを特徴とするものである。   A ball bearing device according to the present invention has a fixed wheel, a rotating wheel, and a ball disposed between both wheels, and is used so that one end is located on the oil bath side. A shield plate having a cylindrical portion fitted to the rotating wheel and a flange portion connected to an axial end portion of the cylindrical portion is provided at the end, and oil supply is performed to introduce oil into the bearing to the flange portion of the shield plate. A hole is provided.

この玉軸受装置は、例えば、その固定輪が軸方向に二列の軌道面を有する１つの外輪部材からなり、その回転輪が一列の軌道面を有する第１および第２の内輪部材からなるものとされ、外輪部材の両端部にカウンタボアが形成され、各内輪部材の中央側の端部にカウンタボアが形成される。   In this ball bearing device, for example, the fixed ring is composed of one outer ring member having two rows of raceway surfaces in the axial direction, and the rotating wheel is composed of first and second inner ring members having a row of raceway surfaces. Counter bores are formed at both ends of the outer ring member, and counter bores are formed at the end on the center side of each inner ring member.

軸受の潤滑は、軸受外部の潤滑油を軸受内部に循環させることで行われる。   The lubrication of the bearing is performed by circulating lubricating oil outside the bearing inside the bearing.

回転輪が内輪であり、シールド板のフランジ部の外周縁部に、径方向内向きに開口した油溜め部を形成する折り返し部が設けられていることが好ましい。このようにすると、回転輪（内輪）の回転によって遠心力を受けた潤滑油は、折り返し部でせき止められて油溜め部内に滞留し、この際、鉄などの比重が大きい異物は、相対的に大きい遠心力が作用することにより、径方向外方に集められ、フランジ部に設けられた給油孔からは異物濃度の低い潤滑油が軸受内に供給される。   It is preferable that the rotating wheel is an inner ring, and a folded portion that forms an oil reservoir that opens radially inward is provided on the outer peripheral edge of the flange portion of the shield plate. In this way, the lubricating oil that has received centrifugal force due to the rotation of the rotating wheel (inner ring) is dammed by the folded portion and stays in the oil reservoir. At this time, foreign matter having a large specific gravity such as iron is relatively When a large centrifugal force is applied, lubricating oil having a low foreign matter concentration is supplied into the bearing from the oil supply holes that are gathered radially outward and provided in the flange portion.

この場合に、折り返し部に、比重大の異物を遠心力で排出する異物排出孔が設けられていることがより好ましい。このようにすると、鉄などの比重が大きい異物は、排出孔から排出されやすく、油溜め部内に滞留する潤滑油に含まれる異物が少なくなり、給油孔から供給される潤滑油に含まれる異物がより一層少なくなる。   In this case, it is more preferable that a foreign matter discharge hole for discharging specific critical foreign matter by centrifugal force is provided in the folded portion. In this way, foreign matter having a large specific gravity such as iron is easily discharged from the discharge hole, and there is less foreign matter contained in the lubricating oil staying in the oil sump, and foreign matter contained in the lubricating oil supplied from the oil supply hole is reduced. Even less.

この発明の玉軸受装置によると、円すいころ軸受に比べて低トルク化が可能であり、しかも、回転輪の油浴側端部に、回転輪に嵌め合わせられた円筒部および円筒部の軸方向端部に連なるフランジ部を有するシールド板が設けられており、シールド板のフランジ部に、軸受内に油を導入する給油孔が設けられているので、鉄などの比重が大きい異物は、相対的に大きい遠心力が作用することにより、フランジ部に沿って径方向外方に移動し、フランジ部に設けられた給油孔から軸受内に供給される潤滑油に含まれる異物が少なくなる。したがって、油浴状態で使用される場合の摩耗粉等の異物侵入による損傷を防止することができる。   According to the ball bearing device of the present invention, it is possible to reduce the torque as compared with the tapered roller bearing, and the cylindrical part fitted to the rotating ring at the oil bath side end of the rotating ring and the axial direction of the cylindrical part A shield plate having a flange portion connected to the end portion is provided, and the flange portion of the shield plate is provided with an oil supply hole for introducing oil into the bearing. As a result of the large centrifugal force acting on the cylinder, the foreign matter contained in the lubricating oil that moves radially outward along the flange portion and is supplied into the bearing from the oil supply hole provided in the flange portion is reduced. Therefore, it is possible to prevent damage caused by foreign matter such as wear powder when used in an oil bath.

この発明の実施の形態を、以下図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、この発明の玉軸受装置の第１実施形態を示している。以下の説明において、左右とは、図の左右をいうものとする。   FIG. 1 shows a first embodiment of a ball bearing device according to the present invention. In the following description, the left and right refer to the left and right in the figure.

この玉軸受装置は、複列外向きアンギュラ玉軸受装置であって、自動車のディファレンシャル・ケース（ケーシング）(1)に取り付けられる外輪（固定輪）(2)と、左端部にピニオンギア(3a)を有するピニオン軸（回転軸）(3)に取り付けられる左右１対の内輪（回転輪）(4)(5)と、外輪(2)の左半部と左の内輪(4)との間に配置された左列の複数の玉(6)と、外輪(2)の右半部と右の内輪(5)との間に配置された右列の複数の玉(7)と、左列の玉(6)を保持する左側の保持器(8)と、右列の玉(7)を保持する右側の保持器(9)と、外輪(2)の右端部と右の内輪(5)の右端部間に設けられた反油浴側シールド板(10)と、外輪(2)の左端部と左の内輪(4)の左端部間に設けられた油浴側シールド板(20)とを備えている。   This ball bearing device is a double-row outward angular ball bearing device, which has an outer ring (fixed ring) (2) attached to a differential case (casing) (1) of an automobile and a pinion gear (3a) at the left end. Between a pair of left and right inner rings (rotating wheels) (4) (5) attached to a pinion shaft (rotating shaft) (3) with a left half of the outer ring (2) and the left inner ring (4) A plurality of balls (6) in the left row arranged, a plurality of balls (7) in the right row arranged between the right half of the outer ring (2) and the right inner ring (5), The left cage (8) that holds the balls (6), the right cage (9) that holds the balls (7) in the right row, the right end of the outer ring (2) and the right inner ring (5) An anti-oil bath side shield plate (10) provided between the right ends, and an oil bath side shield plate (20) provided between the left end portion of the outer ring (2) and the left end portion of the left inner ring (4). I have.

ディファレンシャル・ケース(1)には、ピニオン軸(3)を潤滑するための潤滑油が循環させられている。軸受は、この潤滑油が軸受内に導入されることで潤滑されている。   Lubricating oil for lubricating the pinion shaft (3) is circulated in the differential case (1). The bearing is lubricated by introducing the lubricating oil into the bearing.

外輪(2)は、２列の軌道溝を有しており、その右端部外径に設けられたフランジ部がボルト(11)によってトランスファー・ケース(1)に固定されている。外輪(2)の左右両端部には、カウンタボア(2a)(2b)が形成されている。トランスファー・ケース(1)には、ケース(1)左面にある間隙と連通するようにケース内オイル通路(13)が形成されており、外輪(2)の中央部には、軸受外部から内部にオイルを導入するための中央貫通孔(14)が設けられている。これにより、オイルは、ケース内オイル通路(13)および中央貫通孔(14)を経て軸受内部に流入し、左端側の開口から外部に排出される循環を行う。ケース内オイル通路(13)および中央貫通孔(14)からのオイルの漏れは、外輪(2)とケース(1)との間に配されたＯリング(15)によって防止されている。   The outer ring (2) has two rows of raceway grooves, and a flange portion provided on the outer diameter of the right end thereof is fixed to the transfer case (1) by a bolt (11). Counter bores (2a) and (2b) are formed at both left and right ends of the outer ring (2). The transfer case (1) has an oil passage (13) in the case that communicates with the gap on the left side of the case (1). A central through hole (14) for introducing oil is provided. Thereby, the oil flows into the inside of the bearing through the oil passage (13) in the case and the central through hole (14), and is circulated to be discharged to the outside through the opening on the left end side. Oil leakage from the in-case oil passage (13) and the central through hole (14) is prevented by an O-ring (15) disposed between the outer ring (2) and the case (1).

左右の内輪(4)(5)は、それぞれ１列の軌道溝を有する単列用内輪であって、そのカウンタボア(4a)(5a)同士を突き合わすように配置されている。   The left and right inner rings (4) and (5) are single-row inner rings each having one row of raceway grooves, and are arranged so that the counter bores (4a) and (5a) face each other.

各保持器(8)は、保持器本体(8a)(9a)およびポケット(8b)(9b)を有している。   Each cage (8) has a cage body (8a) (9a) and pockets (8b) (9b).

反油浴側シールド板(10)は、ケース(1)外部からの異物の侵入を防止するためのもので、短円筒部およびこれの左端にある内向きフランジ部からなる環状芯金(11)と、芯金(11)の短円筒部外周面および内向きフランジ部左側面に接着されかつ内輪(5)の肩部に接触するシールリップ部を有するゴムなどの弾性体(12)と、シールリップ部を径方向内向きに付勢して内輪(5)の肩部に押圧するばね(13)とを有しているオイルシールとされ、芯金(11)の短円筒部が弾性体(12)を介して外輪(2)のカウンタボア(2b)に圧入されて固定されている。   The anti-oil bath side shield plate (10) is for preventing foreign matter from entering from the outside of the case (1), and an annular cored bar (11) comprising a short cylindrical portion and an inward flange portion at the left end thereof And an elastic body (12) such as rubber having a seal lip portion that is bonded to the outer peripheral surface of the short cylindrical portion of the core metal (11) and the left side surface of the inward flange portion and contacts the shoulder portion of the inner ring (5), and a seal The oil seal has a spring (13) that urges the lip portion radially inward and presses against the shoulder of the inner ring (5), and the short cylindrical portion of the core metal (11) is an elastic body ( It is press-fitted into the counter bore (2b) of the outer ring (2) through 12) and fixed.

油浴側シールド板(20)は、軸受内への異物の侵入を防止するもので、回転輪である内輪(4)の左端部に嵌め合わせられた円筒部(20a)および円筒部(20a)の左端に設けられかつ固定輪である外輪(2)の左端部内径に所定間隙をおいて対向するフランジ部(20b)からなる環状体であり、そのフランジ部(20b)に、軸受内に油を導入する給油孔(21)が設けられている。   The oil bath side shield plate (20) prevents intrusion of foreign matter into the bearing, and the cylindrical portion (20a) and the cylindrical portion (20a) fitted to the left end of the inner ring (4) which is a rotating wheel Is an annular body composed of a flange portion (20b) that is opposed to the inner diameter of the left end portion of the outer ring (2), which is a fixed ring, with a predetermined gap, and the flange portion (20b) has oil in the bearing. An oil supply hole (21) for introducing the oil is provided.

給油孔(21)は、例えば、円形とされ、フランジ部(20b)を軸方向に貫通するようにかつ周方向の複数カ所（例えば４カ所）に設けられている。   The oil supply holes (21) are, for example, circular, and are provided at a plurality of locations (for example, four locations) in the circumferential direction so as to penetrate the flange portion (20b) in the axial direction.

この第１実施形態の玉軸受装置によると、ピニオン軸(3)の回転時には、遠心力を受けた潤滑油は、油浴側シールド板(20)のフランジ部(20b)に沿って径方向外方に移動し、この際、鉄などの比重が大きい異物は、相対的に大きい遠心力が作用することにより、給油孔(21)近傍には滞留しにくくなり、軸受内に異物が侵入しにくいものとなる。   According to the ball bearing device of the first embodiment, when the pinion shaft (3) rotates, the lubricating oil that receives centrifugal force is radially outward along the flange portion (20b) of the oil bath side shield plate (20). At this time, foreign matter with a large specific gravity such as iron is less likely to stay near the oil supply hole (21) due to the relatively large centrifugal force, and foreign matter is less likely to enter the bearing. It will be a thing.

図２は、この発明の玉軸受装置の第２実施形態を示している。この実施形態は、第１実施形態のものと外輪(2)端部形状および油浴側のシールド板が異なっており、その要部のみを図示している。   FIG. 2 shows a second embodiment of the ball bearing device of the present invention. In this embodiment, the outer ring (2) end shape and the oil bath side shield plate are different from those of the first embodiment, and only the main parts thereof are shown.

この実施形態の油浴側シールド板(22)は、軸受内への異物の浸入を防止するもので、回転輪である内輪(4)の左端部に嵌め合わせられた円筒部(22a)、円筒部(22a)の左端に設けられかつ固定輪である外輪(2)の左端部内径に所定間隙をおいて対向するフランジ部(22b)、およびフランジ部(22b)の外周縁部に設けられた断面Ｌ字状の折り返し部(22c)からなる環状体である。   The oil bath side shield plate (22) of this embodiment is to prevent the intrusion of foreign matter into the bearing, the cylindrical portion (22a) fitted to the left end of the inner ring (4) which is a rotating wheel, The flange portion (22b) is provided at the left end of the portion (22a) and is opposed to the inner diameter of the left end portion of the outer ring (2), which is a fixed ring, with a predetermined gap, and the outer peripheral edge portion of the flange portion (22b). It is an annular body composed of a folded portion (22c) having an L-shaped cross section.

外輪(2)端部には、シールド板(22)との干渉を避ける切欠き部(2c)が設けられている。   A notch (2c) that avoids interference with the shield plate (22) is provided at the end of the outer ring (2).

シールド板(22)のフランジ部(22b)には、第１実施形態のものと同じ給油孔(21)が設けられている。フランジ部(22b)と折り返し部(22c)とによって径方向内向きに開口した油溜め部(23)が形成されており、折り返し部(22c)の円筒部分には、周方向の複数カ所（例えば４カ所）に円形の異物排出孔(24)が設けられている。   The flange portion (22b) of the shield plate (22) is provided with the same oil supply hole (21) as that of the first embodiment. The flange portion (22b) and the folded portion (22c) form an oil sump portion (23) that opens radially inward. The cylindrical portion of the folded portion (22c) has a plurality of circumferential locations (for example, Circular foreign matter discharge holes (24) are provided at four locations).

第２実施形態の玉軸受装置によると、ピニオン軸(3)の回転時には、遠心力を受けた潤滑油は、断面Ｌ字状の折り返し部(22c)でせき止められて油溜め部(23)内に滞留し、この際、鉄などの比重が大きい異物には相対的に大きい遠心力が作用することにより、異物排出孔(24)から排出され、給油孔(21)からは異物をほとんど含まない潤滑油が軸受内に供給される。   According to the ball bearing device of the second embodiment, during the rotation of the pinion shaft (3), the lubricating oil subjected to the centrifugal force is blocked by the folded portion (22c) having an L-shaped cross section and is stored in the oil reservoir (23). At this time, foreign matter having a large specific gravity such as iron is discharged from the foreign matter discharge hole (24) by a relatively large centrifugal force and hardly contains foreign matter from the oil supply hole (21). Lubricating oil is supplied into the bearing.

図３は、この発明の玉軸受装置の第３実施形態を示している。この実施形態は、第１実施形態のものと油浴側のシールド板だけが異なっており、その要部のみを図示している。   FIG. 3 shows a third embodiment of the ball bearing device of the present invention. In this embodiment, only the shield plate on the oil bath side is different from that of the first embodiment, and only the main part is illustrated.

この実施形態の油浴側シールド板(25)は、軸受内への異物の浸入を防止するもので、回転輪である内輪(4)の左端部に嵌め合わせられた円筒部(25a)、円筒部(25a)の左端に設けられたフランジ部(25b)、およびフランジ部(25b)の外周縁部に設けられた断面Ｊ字状の折り返し部(25c)からなる環状体である。   The oil bath side shield plate (25) of this embodiment prevents foreign matter from entering the bearing, and the cylindrical portion (25a) fitted to the left end of the inner ring (4), which is a rotating ring, This is an annular body composed of a flange portion (25b) provided at the left end of the portion (25a) and a folded portion (25c) having a J-shaped cross section provided at the outer peripheral edge of the flange portion (25b).

フランジ部(25b)には、第１実施形態のものと同じ給油孔(21)が設けられている。フランジ部(25b)と折り返し部(25c)とによって径方向内向きに開口した油溜め部(26)が形成されており、折り返し部(25c)の頂部には、周方向の複数カ所（例えば４カ所）に円形の異物排出孔(27)が設けられている。   The flange portion (25b) is provided with the same oil supply hole (21) as that of the first embodiment. An oil sump portion (26) opened radially inward is formed by the flange portion (25b) and the folded portion (25c), and a plurality of circumferential locations (for example, 4) are formed at the top of the folded portion (25c). A circular foreign substance discharge hole (27) is provided at the location.

第３実施形態の玉軸受装置によると、ピニオン軸(3)の回転時には、遠心力を受けた潤滑油は、断面Ｊ字状の折り返し部(25c)でせき止められて油溜め部(26)内に滞留し、この際、鉄などの比重が大きい異物には相対的に大きい遠心力が作用することにより、異物排出孔(27)から排出され、給油孔(21)からは異物をほとんど含まない潤滑油が軸受内に供給される。   According to the ball bearing device of the third embodiment, during the rotation of the pinion shaft (3), the lubricating oil subjected to the centrifugal force is blocked by the folded portion (25c) having a J-shaped cross section and is stored in the oil reservoir (26). At this time, foreign matter having a large specific gravity such as iron is discharged from the foreign matter discharge hole (27) by a relatively large centrifugal force, and hardly contains foreign matter from the oil supply hole (21). Lubricating oil is supplied into the bearing.

なお、上記各実施形態において、シールド板(20)(22)(25)に設けられる給油孔(21)の形状は、種々変更可能であり、軸受への給油量調整のために、図４（ａ）に示すように、円形であってかつＰ．Ｃ．Ｄ．（ピッチ円径）が異なる複数個の孔(21A)としてもよく、図４（ｂ）（ｃ）に示すように、長孔(21B)(21C)としてもよい。長孔(21B)(21C)とする場合には、図４（ｂ）のように、幅が同じとしてもよく、油面が外径側にある場合にも通過する異物量を増加させないように、図４（ｃ）のように、径方向の外方に行くにつれて幅が細くなるようにしてもよい。これらの孔(21A)(21B)(21C)は、周方向の例えば４カ所に等間隔で配置されるが、その数や間隔は適宜変更可能である。   In each of the embodiments described above, the shape of the oil supply hole (21) provided in the shield plates (20), (22), and (25) can be variously changed, and FIG. As shown in FIG. C. D. A plurality of holes (21A) having different (pitch circle diameters) may be used, and as shown in FIGS. 4B and 4C, long holes (21B) and (21C) may be used. When the long holes (21B) and (21C) are used, the widths may be the same as shown in FIG. 4 (b), and the amount of foreign matter passing therethrough is not increased even when the oil level is on the outer diameter side. As shown in FIG. 4C, the width may become narrower as it goes outward in the radial direction. These holes (21A), (21B), and (21C) are arranged at equal intervals, for example, at four locations in the circumferential direction, and the number and interval thereof can be changed as appropriate.

図１は、この発明による玉軸受装置の第１実施形態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a ball bearing device according to a first embodiment of the present invention. 図２は、この発明による玉軸受装置の第２実施形態を示す縦断面図である。FIG. 2 is a longitudinal sectional view showing a second embodiment of the ball bearing device according to the present invention. 図３は、この発明による玉軸受装置の第３実施形態を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a third embodiment of the ball bearing device according to the present invention. 図４は、給油孔の形状の変形例を示す図である。FIG. 4 is a view showing a modification of the shape of the oil supply hole.

符号の説明Explanation of symbols

(2) 外輪（固定輪）
(4)(5) 内輪（回転輪）
(6)(7) 玉
(20)(22)(25) 油浴側シールド板
(20a)(22a)(25a) 円筒部
(20b)(22b)(25b) フランジ部
(22c)(25c) 折り返し部
(21) 給油孔
(23)(26) 油溜め部
(24)(27) 異物排出孔 (2) Outer ring (fixed ring)
(4) (5) Inner ring (rotating wheel)
(6) (7) Ball
(20) (22) (25) Oil bath side shield plate
(20a) (22a) (25a) Cylindrical part
(20b) (22b) (25b) Flange
(22c) (25c) Folding part
(21) Lubrication hole
(23) (26) Oil sump
(24) (27) Foreign matter discharge hole

Claims (3)

固定輪、回転輪、および両輪間に配置された玉を有し、一端が油浴側に位置するように使用される玉軸受装置において、
回転輪の油浴側端部に、回転輪に嵌め合わせられた円筒部および円筒部の軸方向端部に連なるフランジ部を有するシールド板が設けられており、シールド板のフランジ部に、軸受内に油を導入する給油孔が設けられていることを特徴とする玉軸受装置。 In a ball bearing device that has a fixed wheel, a rotating wheel, and a ball disposed between both wheels, and is used so that one end is located on the oil bath side,
A shield plate having a cylindrical portion fitted to the rotary wheel and a flange portion connected to the axial end portion of the cylindrical portion is provided at the oil bath side end portion of the rotary wheel. An oil supply hole for introducing oil into the ball bearing device is provided. 回転輪が内輪であり、シールド板のフランジ部の外周縁部に、径方向内向きに開口した油溜め部を形成する折り返し部が設けられている請求項１の玉軸受装置。   The ball bearing device according to claim 1, wherein the rotating wheel is an inner ring, and a turn-back portion that forms an oil sump portion opened radially inward is provided at an outer peripheral edge portion of the flange portion of the shield plate. 折り返し部に、比重大の異物を遠心力で排出する異物排出孔が設けられている請求項２の玉軸受装置。   The ball bearing device according to claim 2, wherein a foreign matter discharge hole for discharging specific foreign matter by centrifugal force is provided in the folded portion.
JP2004331432A 2004-11-16 2004-11-16 Ball bearing device Withdrawn JP2006144810A (en)

Priority Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008223957A (en) * 2007-03-15 2008-09-25 Jtekt Corp Double row ball bearing
CN107327500A (en) * 2017-08-31 2017-11-07 重庆鲜王机械制造有限公司 A kind of axle sleeve
WO2022264877A1 (en) * 2021-06-14 2022-12-22 Ntn株式会社 Vehicular power device and vehicle wheel bearing device with power generator

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008223957A (en) * 2007-03-15 2008-09-25 Jtekt Corp Double row ball bearing
CN107327500A (en) * 2017-08-31 2017-11-07 重庆鲜王机械制造有限公司 A kind of axle sleeve
CN107327500B (en) * 2017-08-31 2023-08-04 重庆巴欧机电有限公司 Shaft sleeve
WO2022264877A1 (en) * 2021-06-14 2022-12-22 Ntn株式会社 Vehicular power device and vehicle wheel bearing device with power generator

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