JP2021085435A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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Publication number
JP2021085435A
JP2021085435A JP2019213228A JP2019213228A JP2021085435A JP 2021085435 A JP2021085435 A JP 2021085435A JP 2019213228 A JP2019213228 A JP 2019213228A JP 2019213228 A JP2019213228 A JP 2019213228A JP 2021085435 A JP2021085435 A JP 2021085435A
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Japan
Prior art keywords
holding member
mounting member
bearing device
rolling bearing
oil
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JP2019213228A
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Japanese (ja)
Inventor
村田　順司
Junji Murata
順司 村田
徹 神谷
Toru Kamiya
徹 神谷
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JTEKT Corp
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JTEKT Corp
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Priority to JP2019213228A priority Critical patent/JP2021085435A/en
Priority to PCT/JP2020/043059 priority patent/WO2021106722A1/en
Publication of JP2021085435A publication Critical patent/JP2021085435A/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
    • 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
    • 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
    • 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
    • F16N—LUBRICATING
    • F16N11/00—Arrangements for supplying grease from a stationary reservoir or the equivalent in or on the machine or member to be lubricated; Grease cups
    • 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
    • F16N—LUBRICATING
    • F16N19/00—Lubricant containers for use in lubricators or lubrication systems
    • 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
    • F16N—LUBRICATING
    • F16N9/00—Arrangements for supplying oil or unspecified lubricant from a moving reservoir or the equivalent

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

Abstract

To provide a rolling bearing device for preventing an increase in the rotation resistance while enabling the lubricity to be kept over a long period.SOLUTION: A rolling bearing device 10 includes an inward member 14, an outward member 12, a plurality of rolling elements 16 laid between the inward member 14 and the outward member 12, a first mounted member 52-1 and a second mounted member 52-2 mounted to a raceway member of one of the inward member 14 and the outward member 12 at an axial space therefrom, and a first holding member 53-1 and a second holding member 53-2 fixed to the first mounted member 52-1 and the second mounted member 52-2 for holding lubricant oil penetrating themselves, respectively. A space between the first mounted member 52-1 and the second mounted member 52-2 is a storage part 51 for storing semisolid lubricant. The first mounted member 52-1 has at least one through-hole 63-1 through which the lubricant oil in the storage part 51 passes to be supplied to the first holding member 53-1.SELECTED DRAWING: Figure 2

Description

本発明は、転がり軸受装置に関する。 The present invention relates to a rolling bearing device.

各種回転機器の軸受部の潤滑方式として、グリースのような半固体状である潤滑剤による方式が用いられている。グリースによる潤滑方式の場合、油を吐出するポンプ及び油を溜めるタンク等の付帯設備が不要であり、軸受部及びその周囲の構成の簡素化及びコンパクト化が可能となる。グリースによる潤滑が行われる回転機器の例として、ハブベアリング（ハブユニットともいう。）が挙げられる。ハブベアリングは、自動車において車輪を支持する車輪用の転がり軸受装置である。 As a lubrication method for bearings of various rotating devices, a semi-solid lubricant such as grease is used. In the case of the grease lubrication method, ancillary equipment such as a pump for discharging oil and a tank for storing oil is not required, and the configuration of the bearing portion and its surroundings can be simplified and made compact. An example of a rotating device that is lubricated with grease is a hub bearing (also referred to as a hub unit). Hub bearings are rolling bearing devices for wheels that support wheels in automobiles.

グリースにより軸受部の潤滑を行うために、例えば外輪の肩部に繊維材又は多孔質材からなる油保持体が取り付けられている発明が提案されている。例えば、特許文献１には、前記のような油保持体に、油の他に、グリースを含浸させることが開示されている。 In order to lubricate the bearing portion with grease, an invention has been proposed in which, for example, an oil holder made of a fibrous material or a porous material is attached to the shoulder portion of the outer ring. For example, Patent Document 1 discloses that the above-mentioned oil holder is impregnated with grease in addition to oil.

特開２０１７−５８０１３号公報JP-A-2017-58013

特許文献１に開示の転がり軸受装置では、油保持体に油が含浸されていて、その油が油保持体から滲み出ることで、転動体及び軌道の潤滑性が確保される。しかし、油保持体の油が枯渇すると、潤滑性が損なわれる。
また、油保持体にグリースを含浸させる場合、そのグリースに含まれる増ちょう剤又はグリース自体が油保持体から放出されることがある。すると、軌道と転動体との間で増ちょう剤の噛み込みが生じたり、グリースの撹拌による回転抵抗が大きくなったりする。 In the rolling bearing device disclosed in Patent Document 1, the oil holding body is impregnated with oil, and the oil seeps out from the oil holding body to ensure the lubricity of the rolling body and the track. However, when the oil in the oil retainer is depleted, the lubricity is impaired.
Further, when the oil retainer is impregnated with grease, the thickener or the grease itself contained in the grease may be released from the oil retainer. Then, the thickener is caught between the orbit and the rolling element, and the rotational resistance due to the stirring of the grease increases.

そこで、本開示は、転がり軸受装置の潤滑性を長期にわたって維持することが可能であると共に、回転抵抗が増加するのを防ぐことが可能となる転がり軸受装置を提供することを目的とする。 Therefore, an object of the present disclosure is to provide a rolling bearing device capable of maintaining the lubricity of the rolling bearing device for a long period of time and preventing an increase in rotational resistance.

本開示の転がり軸受装置は、外周に軌道を有する内方部材と、内周に軌道を有する外方部材と、前記内方部材と前記外方部材との間に介在し前記軌道を転動する複数の転動体と、前記内方部材と前記外方部材とのうちの一方の軌道部材に軸方向間隔をあけて取り付けられている第一取り付け部材及び第二取り付け部材と、前記第一取り付け部材及び前記第二取り付け部材に固定され潤滑剤の油を浸透させて保持する第一保持部材及び第二保持部材と、を備え、前記第一取り付け部材と前記第二取り付け部材との間が、半固体状である潤滑剤を収容する収容部であり、前記第一取り付け部材は、前記収容部の前記潤滑剤の油を通過させて前記第一保持部材に供給するための貫通穴を少なくとも一つ有し、前記第二取り付け部材は、前記収容部の前記潤滑剤の油を通過させて前記第二保持部材に供給するための貫通穴を少なくとも一つ有する。 The rolling bearing device of the present disclosure is interposed between an inner member having a track on the outer periphery, an outer member having a track on the inner circumference, and the inner member and the outer member, and rolls the track. A plurality of rolling elements, a first mounting member and a second mounting member mounted on one of the raceway members of the inner member and the outer member at axial intervals, and the first mounting member. A first holding member and a second holding member that are fixed to the second mounting member and permeate and hold the oil of the lubricant, and the space between the first mounting member and the second mounting member is half. An accommodating portion for accommodating a solid lubricant, the first mounting member has at least one through hole for passing the oil of the lubricant in the accommodating portion and supplying the first holding member. The second mounting member has at least one through hole for passing the oil of the lubricant in the accommodating portion and supplying the second holding member.

前記転がり軸受装置によれば、収容部に収容されている潤滑剤から油が第一取り付け部材及び第二取り付け部材の貫通穴を通過し、その油は第一保持部材及び第二保持部材に保持される。そして、第一保持部材（第二保持部材）から滲み出た油が、軌道及び転動体に供給される。第一保持部材（第二保持部材）から油が滲み出て消費されても、第一保持部材（第二保持部材）には収容部の潤滑剤から油が補充されるため、転がり軸受装置の潤滑性を長期にわたって維持することが可能となる。また、半固体状である潤滑剤そのものが軌道及び転動体に供給されるのではなく、潤滑剤に含まれる油が供給される。このため、潤滑剤の撹拌及び潤滑剤の噛み込み等により回転抵抗が増加するのを防ぐことが可能となる。 According to the rolling bearing device, oil from the lubricant contained in the accommodating portion passes through the through holes of the first attachment member and the second attachment member, and the oil is retained by the first holding member and the second holding member. Will be done. Then, the oil exuded from the first holding member (second holding member) is supplied to the track and the rolling element. Even if oil seeps out from the first holding member (second holding member) and is consumed, the first holding member (second holding member) is replenished with oil from the lubricant in the accommodating portion, so that the rolling bearing device It is possible to maintain lubricity for a long period of time. Further, the semi-solid lubricant itself is not supplied to the track and the rolling element, but the oil contained in the lubricant is supplied. Therefore, it is possible to prevent the rotational resistance from increasing due to the stirring of the lubricant and the biting of the lubricant.

また、好ましくは、前記第一取り付け部材は、前記軌道部材に密着して取り付けられている円筒部と、当該円筒部から径方向に延びて設けられている立壁部と、前記立壁部の径方向端部から前記円筒部と対向するように延びて設けられ前記第一保持部材と係合し当該第一保持部材が軸方向に脱落するのを阻止する係合部と、を有し、前記第一保持部材は、前記円筒部と前記立壁部と前記係合部との間に形成される空間に収容されている。
この構成によれば、第一取り付け部材の係合部が第一保持部材に係合することにより、第一取り付け部材と第一保持部材とが一体となる。そして、その第一取り付け部材の円筒部は軌道部材に密着して取り付けられるため移動不能である。このような第一取り付け部材によれば、第一保持部材が比較的弾性変形しやすい構造であったとしても、その第一保持部材は移動しないようにして第一取り付け部材を介して軌道部材に取り付けられる。 Further, preferably, the first mounting member includes a cylindrical portion that is closely attached to the track member, a standing wall portion that extends radially from the cylindrical portion, and a radial direction of the standing wall portion. It has an engaging portion that extends from an end portion so as to face the cylindrical portion and engages with the first holding member to prevent the first holding member from falling off in the axial direction. (I) The holding member is housed in a space formed between the cylindrical portion, the standing wall portion, and the engaging portion.
According to this configuration, the first mounting member and the first holding member are integrated by engaging the engaging portion of the first mounting member with the first holding member. The cylindrical portion of the first attachment member is immovable because it is attached in close contact with the track member. According to such a first mounting member, even if the first holding member has a structure that is relatively easily elastically deformed, the first holding member is prevented from moving and becomes a track member via the first mounting member. It is attached.

また、好ましくは、前記円筒部と前記立壁部との間に第一折り曲げ部が介在し、前記立壁部と前記係合部との間に第二折り曲げ部が介在している。この場合、第一取り付け部材をプレスによって製造することが可能となり、第一取り付け部材の製造が容易となる。 Further, preferably, the first bent portion is interposed between the cylindrical portion and the standing wall portion, and the second bent portion is interposed between the standing wall portion and the engaging portion. In this case, the first mounting member can be manufactured by pressing, and the first mounting member can be easily manufactured.

また、好ましくは、前記転動体は、前記内方部材と前記外方部材との間に形成される環状空間に二列となって設けられていて、前記第一取り付け部材、前記第一保持部材、前記第二取り付け部材、前記第二保持部材、及び前記収容部は、一方の前記転動体の列と他方の前記転動体の列との間に設けられている。
この場合、第一取り付け部材、第一保持部材、第二取り付け部材、第二保持部材、及び収容部により構成される一つの給油部から、一方の転動体の列及び他方の転動体の列それぞれに対して油の供給が可能となる。 Further, preferably, the rolling elements are provided in two rows in an annular space formed between the inner member and the outer member, and the first mounting member and the first holding member are provided. The second mounting member, the second holding member, and the accommodating portion are provided between one row of the rolling elements and the other row of the rolling elements.
In this case, from one refueling unit composed of the first mounting member, the first holding member, the second mounting member, the second holding member, and the accommodating portion, one row of rolling elements and the other row of rolling elements, respectively. It is possible to supply oil to the water.

また、好ましくは、前記潤滑剤は、前記油としての基油、及び増ちょう剤を含むグリースである。この場合、第一保持部材及び第二保持部材に浸透した基油が滲み出ると、その基油が軌道に供給される。 Further, preferably, the lubricant is a grease containing a base oil as the oil and a thickener. In this case, when the base oil that has permeated the first holding member and the second holding member exudes, the base oil is supplied to the track.

本開示の転がり軸受装置によれば、潤滑性を長期にわたって維持することが可能であると共に、回転抵抗が増加するのを防ぐことが可能となる。 According to the rolling bearing device of the present disclosure, it is possible to maintain lubricity for a long period of time and prevent an increase in rotational resistance.

転がり軸受装置の一例を示す断面図である。It is sectional drawing which shows an example of the rolling bearing apparatus. 給油部及びその周囲を示す断面図である。It is sectional drawing which shows the refueling part and its surroundings. 給油部を主に示す断面図である。It is sectional drawing which mainly shows the refueling part. 第一取り付け部材の一部を軸方向一方側から見た図である。It is the figure which saw a part of the 1st attachment member from one side in the axial direction. 取り付け部材の製造を説明する断面図である。It is sectional drawing explaining the manufacturing of the attachment member. 取り付け部材の製造を説明する断面図である。It is sectional drawing explaining the manufacturing of the attachment member.

〔転がり軸受装置について〕
図１は、転がり軸受装置の一例を示す断面図である。図１に示す転がり軸受装置１０は、車輪用軸受装置である。車輪用軸受装置は、ハブベアリング又はハブユニットとも称され、車両（自動車）の車体に設けられている懸架装置に取り付けられ、車輪７を回転可能に支持する。図１に示す転がり軸受装置１０が車体（懸架装置）に取り付けられた状態で、図１の右側が、車輪７側であり、車両アウタ側と称される。図１の左側が、車体中央側であり、車両インナ側と称される。 [About rolling bearing equipment]
FIG. 1 is a cross-sectional view showing an example of a rolling bearing device. The rolling bearing device 10 shown in FIG. 1 is a wheel bearing device. The wheel bearing device, also referred to as a hub bearing or a hub unit, is attached to a suspension device provided on the vehicle body of a vehicle (automobile) and rotatably supports the wheels 7. With the rolling bearing device 10 shown in FIG. 1 attached to the vehicle body (suspension device), the right side of FIG. 1 is the wheel 7 side, which is referred to as the vehicle outer side. The left side of FIG. 1 is the center side of the vehicle body, which is referred to as the vehicle inner side.

本開示の転がり軸受装置１０において、転がり軸受装置１０の中心線Ｃに沿った方向が「軸方向」と定義される。この軸方向には、転がり軸受装置１０の中心線Ｃに平行な方向も含まれる。本開示の転がり軸受装置１０では、車両アウタ側が軸方向一方側となり、車両インナ側が軸方向他方側となる。また、中心線Ｃに直交する方向が「径方向」と定義され、中心線Ｃを中心とする周回方向が「周方向」と定義される。 In the rolling bearing device 10 of the present disclosure, the direction along the center line C of the rolling bearing device 10 is defined as the "axial direction". This axial direction also includes a direction parallel to the center line C of the rolling bearing device 10. In the rolling bearing device 10 of the present disclosure, the outer side of the vehicle is one side in the axial direction, and the inner side of the vehicle is the other side in the axial direction. Further, the direction orthogonal to the center line C is defined as the "diameter direction", and the circumferential direction centered on the center line C is defined as the "circumferential direction".

転がり軸受装置１０は、外方部材（外輪部材ともいう。）１２と、内方部材（内軸部材ともいう。）１４と、外方部材１２と内方部材１４との間に設けられている複数の転動体１６とを備える。本開示の転動体１６は、玉である。 The rolling bearing device 10 is provided between the outer member (also referred to as an outer ring member) 12, the inner member (also referred to as an inner shaft member) 14, and the outer member 12 and the inner member 14. A plurality of rolling elements 16 are provided. The rolling element 16 of the present disclosure is a ball.

外方部材１２は、円筒形状である外輪本体部２２と、外輪本体部２２から径方向外方に向かって延びて設けられている固定用のフランジ部２４とを有する。外輪本体部２２の内周の軸方向一方側及び他方側それぞれに、外側軌道面２６が形成されている。外側軌道面２６は、転動体１６が転動（転がり接触）する軌道である。フランジ部２４が車体側部材である懸架装置の一部に取り付けられる。これにより、外方部材１２を含む転がり軸受装置１０が車体に固定される。 The outer member 12 has a cylindrical outer ring main body 22 and a fixing flange 24 extending radially outward from the outer ring main body 22. An outer raceway surface 26 is formed on one side and the other side of the inner circumference of the outer ring main body 22 in the axial direction. The outer raceway surface 26 is a raceway on which the rolling element 16 rolls (rolls in contact). The flange portion 24 is attached to a part of the suspension device which is a member on the vehicle body side. As a result, the rolling bearing device 10 including the outer member 12 is fixed to the vehicle body.

内方部材１４は、軸状のハブ軸３２（内軸）と、ハブ軸３２の軸方向他方側に固定されている内輪３４とを有する。ハブ軸３２は、外方部材１２の径方向内方に設けられている軸本体部３６と、フランジ部３８とを有する。軸本体部３６は、軸方向に長い部分である。フランジ部３８は、軸本体部３６の軸方向一方側から径方向外方に向かって延びて設けられている部分である。フランジ部３８に、ボルト穴３９が形成されている。このボルト穴３９に取り付けられるボルト８によって車輪７がフランジ部３８に固定される。内輪３４は、環状の部材であり、軸本体部３６の軸方向他方側の一部４０に外嵌して固定されている。 The inner member 14 has a shaft-shaped hub shaft 32 (inner shaft) and an inner ring 34 fixed to the other side of the hub shaft 32 in the axial direction. The hub shaft 32 has a shaft body portion 36 provided inward in the radial direction of the outer member 12 and a flange portion 38. The shaft body portion 36 is a portion that is long in the axial direction. The flange portion 38 is a portion of the shaft body portion 36 extending from one side in the axial direction toward the outside in the radial direction. A bolt hole 39 is formed in the flange portion 38. The wheel 7 is fixed to the flange portion 38 by the bolt 8 attached to the bolt hole 39. The inner ring 34 is an annular member, and is externally fitted and fixed to a part 40 on the other side in the axial direction of the shaft main body portion 36.

軸本体部３６の外周側に、転動体１６が転動する軌道として軸軌道面４２が形成されている。内輪３４の外周面に、転動体１６が転動する軌道として内輪軌道面４４が形成されている。軸方向一方側の外側軌道面２６と軸軌道面４２との間に複数の転動体１６が設けられている。軸方向他方側の外側軌道面２６と内輪軌道面４４との間に複数の転動体１６が設けられている。つまり、転がり軸受装置１０は、二列の転動体１６を備える。各列において、複数の転動体１６は保持器１８によって保持されている。 A shaft track surface 42 is formed on the outer peripheral side of the shaft body 36 as a track on which the rolling element 16 rolls. An inner ring raceway surface 44 is formed on the outer peripheral surface of the inner ring 34 as a raceway on which the rolling element 16 rolls. A plurality of rolling elements 16 are provided between the outer raceway surface 26 on one side in the axial direction and the shaft raceway surface 42. A plurality of rolling elements 16 are provided between the outer raceway surface 26 on the other side in the axial direction and the inner ring raceway surface 44. That is, the rolling bearing device 10 includes two rows of rolling elements 16. In each row, the plurality of rolling elements 16 are held by the cage 18.

以上のように、本開示の転がり軸受装置１０は、外周に軌道として軸軌道面４２及び内輪軌道面４４を有する内方部材１４と、内周に軌道として外側軌道面２６，２６を有する外方部材１２と、これら内方部材１４と外方部材１２との間に介在し前記軌道を転動する複数の転動体１６とを備える。外方部材１２と内方部材１４とは同心状に配置され、外方部材１２に対して内方部材１４が中心線Ｃを中心として回転する。 As described above, the rolling bearing device 10 of the present disclosure has an inner member 14 having an axial raceway surface 42 and an inner ring raceway surface 44 as racetracks on the outer circumference, and outer racetracks 26 and 26 having outer raceway surfaces 26 and 26 as racetracks on the inner circumference. A member 12 and a plurality of rolling elements 16 that are interposed between the inner member 14 and the outer member 12 and roll on the trajectory are provided. The outer member 12 and the inner member 14 are arranged concentrically, and the inner member 14 rotates about the center line C with respect to the outer member 12.

本開示の転がり軸受装置１０は、半固体状の潤滑剤であるグリース５６に含まれる基油によって潤滑される。特に、転動体１６と各軌道との間、及び、転動体１６と保持器１８との摺接部が、給油対象となり、基油によって潤滑される。そのため、転がり軸受装置１０は、潤滑機能を高めるための給油部５０を更に備える。 The rolling bearing device 10 of the present disclosure is lubricated by the base oil contained in the grease 56 which is a semi-solid lubricant. In particular, the sliding contact portion between the rolling element 16 and each track and between the rolling element 16 and the cage 18 is subject to lubrication and is lubricated by the base oil. Therefore, the rolling bearing device 10 further includes a lubrication unit 50 for enhancing the lubrication function.

給油部５０は、外方部材１２と内方部材１４との内の一方の軌道部材に設けられる。本開示では、固定輪となる外方部材１２の内周部に給油部５０は設けられる。給油部５０の具体的構成については後に説明するが、給油部５０は、グリース５６に含まれる基油を、軸方向一方側の外側軌道面２６及び軸方向他方側の外側軌道面２６それぞれに供給可能である。外側軌道面２６に供給された基油は、転動体１６に付着し、更に、軸軌道面４２及び内輪軌道面４４に供給される。また、転動体１６に付着した基油は、保持器１８にも供給される。 The refueling unit 50 is provided on one of the track members of the outer member 12 and the inner member 14. In the present disclosure, the refueling portion 50 is provided on the inner peripheral portion of the outer member 12 serving as the fixed ring. The specific configuration of the refueling unit 50 will be described later, but the refueling unit 50 supplies the base oil contained in the grease 56 to the outer raceway surface 26 on one side in the axial direction and the outer raceway surface 26 on the other side in the axial direction, respectively. It is possible. The base oil supplied to the outer raceway surface 26 adheres to the rolling element 16, and is further supplied to the shaft raceway surface 42 and the inner ring raceway surface 44. Further, the base oil adhering to the rolling element 16 is also supplied to the cage 18.

グリース５６は、基油に増ちょう剤を分散させた半固体状の潤滑剤である。グリース５６には、基油及び増ちょう剤の他に添加剤が含まれる。グリース５６として、従来より転がり軸受の潤滑に用いられる一般的なグリースが採用される。 Grease 56 is a semi-solid lubricant in which a thickener is dispersed in a base oil. The grease 56 contains additives in addition to the base oil and the thickener. As the grease 56, general grease conventionally used for lubrication of rolling bearings is adopted.

〔給油部５０について〕
図２は、給油部５０及びその周囲を示す断面図である。給油部５０は、第一取り付け部材５２−１、第一保持部材５３−１、第二取り付け部材５２−２、及び第二保持部材５３−２を有する。第一取り付け部材５２−１と第二取り付け部材５２−２とは、全体として環状であり、また、第一保持部材５３−１と第二保持部材５３−２とは、全体として環状である。外方部材１２のうち、軸方向一方側の外側軌道面２６と軸方向他方側の外側軌道面２６との間の面は、給油部５０が設けられる対象面５４である。対象面５４は転がり軸受装置１０の中心線Ｃ（図１参照）を中心とする円筒面である。その対象面５４に給油部５０が設けられている。 [About the refueling unit 50]
FIG. 2 is a cross-sectional view showing the refueling unit 50 and its surroundings. The refueling unit 50 has a first mounting member 52-1, a first holding member 53-1, a second mounting member 52-2, and a second holding member 53-2. The first mounting member 52-1 and the second mounting member 52-2 are annular as a whole, and the first holding member 53-1 and the second holding member 53-2 are annular as a whole. Of the outer members 12, the surface between the outer raceway surface 26 on one side in the axial direction and the outer raceway surface 26 on the other side in the axial direction is the target surface 54 on which the refueling unit 50 is provided. The target surface 54 is a cylindrical surface centered on the center line C (see FIG. 1) of the rolling bearing device 10. A refueling unit 50 is provided on the target surface 54.

第一取り付け部材５２−１と第二取り付け部材５２−２とは、軸方向間隔をあけて、外方部材１２の内周部に取り付けられている。対象面５４の径方向内方側であって、第一取り付け部材５２−１と第二取り付け部材５２−２との間が、グリース５６を収容する収容部５１となる。第一保持部材５３−１は、第一取り付け部材５２−１に固定されている。第二保持部材５３−２は、第二取り付け部材５２−２に固定されている。その固定のための具体的構成については、後に説明する。第一保持部材５３−１及び第二保持部材５３−２は、グリース５６の基油を浸透させて保持することができる。 The first mounting member 52-1 and the second mounting member 52-2 are mounted on the inner peripheral portion of the outer member 12 with an axial interval. The accommodating portion 51 for accommodating the grease 56 is located on the radial inward side of the target surface 54 between the first attachment member 52-1 and the second attachment member 52-2. The first holding member 53-1 is fixed to the first mounting member 52-1. The second holding member 53-2 is fixed to the second mounting member 52-2. The specific configuration for fixing the structure will be described later. The first holding member 53-1 and the second holding member 53-2 can be permeated with the base oil of the grease 56 and held.

第一取り付け部材５２−１は、円筒部６０−１と、立壁部７１−１と、係合部７２−１とを有する。円筒部６０−１は、円筒形状を有する。円筒部６０−１の外径は、前記対象面５４の内径よりも大きく設定されている。つまり、円筒部６０−１は、外方部材１２に対して、しまりばめの公差を有し、第一取り付け部材５２−１は、対象面５４に圧入により取り付けられる。これにより、円筒部６０−１は、外方部材１２に密着して取り付けられた状態となり、第一取り付け部材５２−１は外方部材１２に対して移動不能となる。 The first mounting member 52-1 has a cylindrical portion 60-1, a standing wall portion 71-1, and an engaging portion 72-1. The cylindrical portion 60-1 has a cylindrical shape. The outer diameter of the cylindrical portion 60-1 is set to be larger than the inner diameter of the target surface 54. That is, the cylindrical portion 60-1 has a tight fit tolerance with respect to the outer member 12, and the first attachment member 52-1 is press-fitted onto the target surface 54. As a result, the cylindrical portion 60-1 is in a state of being closely attached to the outer member 12, and the first attachment member 52-1 is immovable with respect to the outer member 12.

図３は、給油部５０を主に示す断面図である。立壁部７１−１は、円環状の部分である。立壁部７１−１は、円筒部６０−１の軸方向他方側の端部から径方向内方に延びて設けられている。図３に示す係合部７２−１は、円筒状であるフランジ部７３−１と、爪部７４−１とを有する。フランジ部７３−１は、立壁部７１−１の内周側端部から軸方向一方に向かって延びて設けられている。爪部７４−１は、フランジ部７３−１の軸方向一方側の端部から径方向外方に向かって延びて設けられている。爪部７４−１は、径方向の寸法について、立壁部７１−１よりも小さい円環状の部分である。 FIG. 3 is a cross-sectional view mainly showing the refueling unit 50. The vertical wall portion 71-1 is an annular portion. The vertical wall portion 71-1 is provided so as to extend inward in the radial direction from the end portion on the other side in the axial direction of the cylindrical portion 60-1. The engaging portion 72-1 shown in FIG. 3 has a cylindrical flange portion 73-1 and a claw portion 74-1. The flange portion 73-1 is provided so as to extend in one axial direction from the inner peripheral side end portion of the vertical wall portion 71-1. The claw portion 74-1 is provided so as to extend radially outward from the end portion on one side in the axial direction of the flange portion 73-1. The claw portion 74-1 is an annular portion smaller than the standing wall portion 71-1 in terms of radial dimensions.

第一取り付け部材５２−１において、円筒部６０−１と立壁部７１−１と係合部７２−１との間に、環状の空間が形成される。その空間に第一保持部材５３−１が収容されている。第一保持部材５３−１は、円筒部６０−１とフランジ部７３−１とによって径方向に挟まれた状態となり、第一取り付け部材５２−１から径方向に脱落が不能となる。第一保持部材５３−１は、立壁部７１−１の径方向内側部と爪部７４−１とによって軸方向に挟まれた状態となり、第一取り付け部材５２−１から軸方向に脱落不能となる。 In the first mounting member 52-1, an annular space is formed between the cylindrical portion 60-1 and the standing wall portion 71-1 and the engaging portion 72-1. The first holding member 53-1 is housed in the space. The first holding member 53-1 is sandwiched in the radial direction by the cylindrical portion 60-1 and the flange portion 73-1, and cannot be detached from the first mounting member 52-1 in the radial direction. The first holding member 53-1 is sandwiched in the axial direction by the radial inner portion of the vertical wall portion 71-1 and the claw portion 74-1, and cannot be detached from the first mounting member 52-1 in the axial direction. Become.

以上のように、第一取り付け部材５２−１が有する係合部７２−１は、立壁部７１−１の径方向内側の端部から円筒部６０−１と対向するように軸方向一方に延びて設けられている。その係合部７２−１の一部である爪部７４−１が、第一保持部材５３−１に軸方向一方側から接触する態様で第一保持部材５３−１と係合している。これにより、第一保持部材５３−１が第一取り付け部材５２−１から軸方向一方に脱落するのを阻止する。第一保持部材５３−１は、第一取り付け部材５２−１に固定された状態となる。 As described above, the engaging portion 72-1 included in the first mounting member 52-1 extends in one axial direction from the radially inner end of the standing wall portion 71-1 so as to face the cylindrical portion 60-1. It is provided. The claw portion 74-1, which is a part of the engaging portion 72-1, is engaged with the first holding member 53-1 in such a manner that it contacts the first holding member 53-1 from one side in the axial direction. This prevents the first holding member 53-1 from falling off from the first mounting member 52-1 in one axial direction. The first holding member 53-1 is in a state of being fixed to the first mounting member 52-1.

第二取り付け部材５２−２は、円筒部６０−２と、立壁部７１−２と、係合部７２−２とを有する。第一取り付け部材５２−１と第二取り付け部材５２−２とは、図３において左右対称形状を有するが、同じ構成である。第二取り付け部材５２−２は、円筒部６０−２において、外方部材１２に密着して取り付けられた状態となる。立壁部７１−２は、円筒部６０−２から径方向内方に延びて設けられている。係合部７２−２は、円筒状であるフランジ部７３−２と、爪部７４−２とを有する。 The second mounting member 52-2 has a cylindrical portion 60-2, a standing wall portion 71-2, and an engaging portion 72-2. The first mounting member 52-1 and the second mounting member 52-2 have a symmetrical shape in FIG. 3, but have the same configuration. The second attachment member 52-2 is in a state of being closely attached to the outer member 12 in the cylindrical portion 60-2. The vertical wall portion 71-2 is provided so as to extend inward in the radial direction from the cylindrical portion 60-2. The engaging portion 72-2 has a cylindrical flange portion 73-2 and a claw portion 74-2.

第二取り付け部材５２−２において、円筒部６０−２と立壁部７１−２と係合部７２−２との間に、環状の空間が形成される。その空間に第二保持部材５３−２が収容されている。係合部７２−２は、立壁部７１−２の径方向内側の端部から円筒部６０−２と対向するように軸方向他方に延びて設けられている。その係合部７２−２の一部である爪部７４−２が、第二保持部材５３−２に軸方向他方側から接触する態様で第二保持部材５３−２と係合している。これにより、第二保持部材５３−２が第二取り付け部材５２−２から軸方向他方に脱落するのを阻止する。第二保持部材５３−２は、第二取り付け部材５２−２に固定された状態となる。 In the second mounting member 52-2, an annular space is formed between the cylindrical portion 60-2, the standing wall portion 71-2, and the engaging portion 72-2. The second holding member 53-2 is housed in the space. The engaging portion 72-2 is provided so as to extend from the radially inner end of the vertical wall portion 71-2 to the other in the axial direction so as to face the cylindrical portion 60-2. The claw portion 74-2, which is a part of the engaging portion 72-2, is engaged with the second holding member 53-2 in such a manner that it contacts the second holding member 53-2 from the other side in the axial direction. This prevents the second holding member 53-2 from falling off from the second mounting member 52-2 in the other direction in the axial direction. The second holding member 53-2 is in a state of being fixed to the second mounting member 52-2.

以上の構成により、第一保持部材５３−１は、第一取り付け部材５２−１を介して外方部材１２（外輪本体部２２）に取り付けられている。第二保持部材５３−２は、第二取り付け部材５２−２を介して外方部材１２（外輪本体部２２）に取り付けられている。なお、第一取り付け部材５２−１へ第一保持部材５３−１を取り付ける作業、及び、第二取り付け部材５２−２へ第二保持部材５３−２を取り付ける作業は、第一保持部材５３−１及び第二保持部材５３−２それぞれを弾性変形させることによって行われる。第一保持部材５３−１及び第二保持部材５３−２それぞれは、多孔質材からなるため、比較的弾性変形しやすい。 With the above configuration, the first holding member 53-1 is attached to the outer member 12 (outer ring main body 22) via the first attachment member 52-1. The second holding member 53-2 is attached to the outer member 12 (outer ring main body 22) via the second attachment member 52-2. The work of attaching the first holding member 53-1 to the first mounting member 52-1 and the work of attaching the second holding member 53-2 to the second mounting member 52-2 are the first holding member 53-1. And the second holding member 53-2 are each elastically deformed. Since each of the first holding member 53-1 and the second holding member 53-2 is made of a porous material, they are relatively easily elastically deformed.

第一取り付け部材５２−１の立壁部７１−１と、第二取り付け部材５２−２の立壁部７１−２との間が、グリース５６を収容する収容部５１となる。収容部５１は、外方部材１２に沿った環状の空間であり、その空間にグリース５６が周方向に沿って設けられている。 The space between the standing wall portion 71-1 of the first mounting member 52-1 and the standing wall portion 71-2 of the second mounting member 52-2 is the accommodating portion 51 for accommodating the grease 56. The accommodating portion 51 is an annular space along the outer member 12, and grease 56 is provided in the space along the circumferential direction.

図４は、第一取り付け部材５２−１の一部を軸方向一方側から見た図である。
第一取り付け部材５２−１は、収容部５１のグリース５６の基油を通過可能とする貫通穴６３−１を有する。貫通穴６３−１は、立壁部７１−１に形成されている。収容部５１のグリース５６の基油は、貫通穴６３−１を通過することができる。貫通穴６３−１は、第一取り付け部材５２−１の周方向に沿って少なくとも一つ設けられていればよい。貫通穴６３−１を通過した基油は、第一保持部材５３−１に供給される。貫通穴６３−１は、例えば、周方向に間隔をあけて４箇所に設けられる。貫通穴６３−１は、複数設けられる場合、周方向に等間隔で配置される。 FIG. 4 is a view of a part of the first mounting member 52-1 as viewed from one side in the axial direction.
The first mounting member 52-1 has a through hole 63-1 that allows the base oil of the grease 56 of the accommodating portion 51 to pass through. The through hole 63-1 is formed in the vertical wall portion 71-1. The base oil of the grease 56 of the accommodating portion 51 can pass through the through hole 63-1. At least one through hole 63-1 may be provided along the circumferential direction of the first mounting member 52-1. The base oil that has passed through the through hole 63-1 is supplied to the first holding member 53-1. Through holes 63-1 are provided at four locations at intervals in the circumferential direction, for example. When a plurality of through holes 63-1 are provided, they are arranged at equal intervals in the circumferential direction.

図３に示すように、第二取り付け部材５２−２においても、第一取り付け部材５２−１と同様に、収容部５１のグリース５６の基油を通過可能とする貫通穴６３−２を有する。貫通穴６３−２は、立壁部７１−２に形成されている。収容部５１のグリース５６の基油は、貫通穴６３−２を通過することができる。貫通穴６３−２は、第二取り付け部材５２−２の周方向に沿って少なくとも一つ設けられていればよい。貫通穴６３−２を通過した基油は、第二保持部材５３−２に供給される。貫通穴６３−２は、例えば、周方向に間隔をあけて４箇所に設けられる。貫通穴６３−２は、複数設けられる場合、周方向に等間隔で配置される。 As shown in FIG. 3, the second mounting member 52-2 also has a through hole 63-2 that allows the base oil of the grease 56 of the accommodating portion 51 to pass through, similarly to the first mounting member 52-1. The through hole 63-2 is formed in the vertical wall portion 71-2. The base oil of the grease 56 of the accommodating portion 51 can pass through the through hole 63-2. At least one through hole 63-2 may be provided along the circumferential direction of the second mounting member 52-2. The base oil that has passed through the through hole 63-2 is supplied to the second holding member 53-2. Through holes 63-2 are provided at four locations at intervals in the circumferential direction, for example. When a plurality of through holes 63-2 are provided, they are arranged at equal intervals in the circumferential direction.

貫通穴６３−１，６３−２それぞれの形状は、円形である以外に、長円形、楕円形、矩形であってもよい。 The shapes of the through holes 63-1 and 63-2 may be oval, elliptical, or rectangular, in addition to being circular.

第一取り付け部材５２−１は、例えば圧延鋼板（ＳＰＣＣ）により製造される。本開示の第一取り付け部材５２−１は、図５Ａ及び図５Ｂに示すように、円環状の部材５５を、金型を用いてプレス加工することで製造される。円環状の部材５５の内周部５５ｃ及び外周部５５ｂを軸方向に向かうように塑性変形させる。円環状の部材５５の中央部５５ａが立壁部７１−１となり、外周部５５ｂが円筒部６０−１となり、内周部５５ｃが係合部７２−１となる。このように、円環状の部材５５をプレス加工することで、第一取り付け部材５２−１が容易に製造される。 The first mounting member 52-1 is manufactured by, for example, a rolled steel plate (SPCC). As shown in FIGS. 5A and 5B, the first mounting member 52-1 of the present disclosure is manufactured by pressing an annular member 55 using a die. The inner peripheral portion 55c and the outer peripheral portion 55b of the annular member 55 are plastically deformed so as to be oriented in the axial direction. The central portion 55a of the annular member 55 becomes the standing wall portion 71-1, the outer peripheral portion 55b becomes the cylindrical portion 60-1, and the inner peripheral portion 55c becomes the engaging portion 72-1. By pressing the annular member 55 in this way, the first mounting member 52-1 can be easily manufactured.

第一取り付け部材５２−１がプレスによって製造されることで、第一取り付け部材５２−１は、次のように構成される。すなわち、円筒部６０−１と立壁部７１−１との間に第一折り曲げ部７５が介在し、立壁部７１−１と係合部７２−１との間に第二折り曲げ部７６が介在する。係合部７２−１において、フランジ部７３−１と爪部７４−１との間に第三折り曲げ部７７が介在している。第一折り曲げ部７５、第二折り曲げ部７６、及び第三折り曲げ部７７それぞれは、塑性変形部であり、湾曲した形状を有する。 Since the first mounting member 52-1 is manufactured by pressing, the first mounting member 52-1 is configured as follows. That is, the first bent portion 75 is interposed between the cylindrical portion 60-1 and the standing wall portion 71-1, and the second bent portion 76 is interposed between the standing wall portion 71-1 and the engaging portion 72-1. .. In the engaging portion 72-1, the third bent portion 77 is interposed between the flange portion 73-1 and the claw portion 74-1. Each of the first bent portion 75, the second bent portion 76, and the third bent portion 77 is a plastically deformed portion and has a curved shape.

なお、第一取り付け部材５２−１と第二取り付け部材５２−２とは、前記のとおり（図３参照）構成は同じであり、外方部材１２への取り付け向きが異なる。第二取り付け部材５２−２は、第一取り付け部材５２−１と同じ方法によって製造される。 The first mounting member 52-1 and the second mounting member 52-2 have the same configuration as described above (see FIG. 3), but have different mounting directions to the outer member 12. The second mounting member 52-2 is manufactured by the same method as the first mounting member 52-1.

図３において、収容部５１のグリース５６から第一取り付け部材５２−１の貫通穴６３−１を通じて行われる第一保持部材５３−１への基油の供給のための構成及びメカニズムは、収容部５１のグリース５６から第二取り付け部材５２−２の貫通穴６３−２を通じて行われる第二保持部材５３−２への基油の供給のための構成及びメカニズムと、同じである。また、第一保持部材５３−１から軸方向一方の外側軌道面２６への基油の供給のための構成及びメカニズムは、第二保持部材５３−２から軸方向他方の外側軌道面２６への基油の供給のための構成及びメカニズムと、同じである。
そこで、以下では、軸方向一方側である、第一取り付け部材５２−１と第一保持部材５３−１との組について説明し、軸方向他方側である、第二取り付け部材５２−２と第二保持部材５３−２との組についての説明は省略する。 In FIG. 3, the configuration and mechanism for supplying the base oil from the grease 56 of the accommodating portion 51 to the first holding member 53-1 through the through hole 63-1 of the first mounting member 52-1 is the accommodating portion. It is the same as the configuration and mechanism for supplying the base oil from the grease 56 of 51 to the second holding member 53-2 through the through hole 63-2 of the second mounting member 52-2. Further, the configuration and mechanism for supplying the base oil from the first holding member 53-1 to the outer raceway surface 26 in the axial direction is from the second holding member 53-2 to the outer raceway surface 26 in the axial direction. It is the same as the configuration and mechanism for the supply of base oil.
Therefore, in the following, the set of the first mounting member 52-1 and the first holding member 53-1 on one side in the axial direction will be described, and the second mounting member 52-2 and the second mounting member 52-1 on the other side in the axial direction will be described. (Ii) The description of the set with the holding member 53-2 will be omitted.

本開示の第一保持部材５３−１は、多孔質材からなり、グリース５６に含まれている基油の浸透、及び、周囲の面への基油の滲み出しが可能である。第一保持部材５３−１は、貫通穴６３−１を覆うようにして第一取り付け部材５２−１に取り付けられた状態となる。第一保持部材５３−１は、貫通穴６３−１を通過するグリース５６の基油を浸透させて保持することができる。 The first holding member 53-1 of the present disclosure is made of a porous material, and is capable of permeating the base oil contained in the grease 56 and exuding the base oil to the surrounding surface. The first holding member 53-1 is in a state of being attached to the first attachment member 52-1 so as to cover the through hole 63-1. The first holding member 53-1 can permeate and hold the base oil of the grease 56 passing through the through hole 63-1.

第一保持部材５３−１は、全体として環状であり、図３に示すように、その断面形状は矩形である。なお、第一保持部材５３−１の断面形状は矩形以外であってもよい。第一保持部材５３−１の断面形状にあわせて、第一取り付け部材５２−１の立壁部７１−１及び係合部７２−１の形状が変更される。第一保持部材５３−１が第一取り付け部材５２−１に取り付けられている状態で、第一保持部材５３−１は、円筒部６０−１、立壁部７１−１、及び係合部７２−１と接触した状態にある。 The first holding member 53-1 has an annular shape as a whole, and as shown in FIG. 3, its cross-sectional shape is rectangular. The cross-sectional shape of the first holding member 53-1 may be other than a rectangle. The shapes of the standing wall portion 71-1 and the engaging portion 72-1 of the first mounting member 52-1 are changed according to the cross-sectional shape of the first holding member 53-1. With the first holding member 53-1 attached to the first mounting member 52-1, the first holding member 53-1 has a cylindrical portion 60-1, a standing wall portion 71-1, and an engaging portion 72-. It is in contact with 1.

第一保持部材５３−１に、油が予め含浸されている。第一保持部材５３−１に含浸させる油は、グリース５６に含まれる基油と同じ種類であればよい。これにより、収容部５１のグリース５６から第一保持部材５３−１への基油の移動が行われやすい。 The first holding member 53-1 is pre-impregnated with oil. The oil impregnated in the first holding member 53-1 may be the same type as the base oil contained in the grease 56. As a result, the base oil is easily transferred from the grease 56 of the accommodating portion 51 to the first holding member 53-1.

第一取り付け部材５２−１の円筒部６０−１は、第一保持部材５３−１よりも、軸方向に長い。そして、円筒部６０−１の軸方向一方側の端部６６ａは、第一保持部材５３−１よりも、軸方向一方の外側軌道面２６側に位置している。 The cylindrical portion 60-1 of the first mounting member 52-1 is longer in the axial direction than the first holding member 53-1. The end portion 66a on one side in the axial direction of the cylindrical portion 60-1 is located closer to the outer raceway surface 26 on one side in the axial direction than the first holding member 53-1.

多孔質材からなる第一保持部材５３−１は、焼結又は発泡により製造される。第一保持部材５３−１は、連続する多数の微細空孔を有する。第一保持部材５３−１の空孔の直径（平均径）及び空孔率は、グリース５６に含まれる基油の種類及び粘度、並びに、グリース５６に含まれる増ちょう剤の種類及び量に応じて設定される。 The first holding member 53-1 made of a porous material is manufactured by sintering or foaming. The first holding member 53-1 has a large number of continuous fine pores. The diameter (average diameter) and porosity of the pores of the first holding member 53-1 depend on the type and viscosity of the base oil contained in the grease 56 and the type and amount of the thickener contained in the grease 56. Is set.

例として、空孔の直径（平均径）は、例えば、２０マイクロメートル以上、２００マイクロメートル以下に設定されるのが好ましい。空孔の直径が２０マイクロメートル以上であることにより、基油の浸透及び滲み出しについて、第一保持部材５３−１は所望の性能を有することができる。空孔の直径が２００マイクロメートル以下であることにより、グリース５６に含まれる増ちょう剤等を空孔に侵入し難くする機能が高まる。基油の保有量を確保するために、例えば、空孔率（体積率）は、５０％以上、９０％以下に設定されるのが好ましい。 As an example, the diameter (average diameter) of the pores is preferably set to, for example, 20 micrometers or more and 200 micrometers or less. When the diameter of the pores is 20 micrometers or more, the first holding member 53-1 can have a desired performance with respect to the permeation and exudation of the base oil. When the diameter of the pores is 200 micrometers or less, the function of making it difficult for the thickener or the like contained in the grease 56 to penetrate into the pores is enhanced. In order to secure the holding amount of the base oil, for example, the porosity (volume fraction) is preferably set to 50% or more and 90% or less.

本開示の第一保持部材５３−１は多孔質材であるが、羊毛等の繊維材料を圧縮して所定形状に成型して得られた繊維体であってもよい。この場合においても、その第一保持部材５３−１は、油の浸透及び滲み出しが可能である。しかし、第一保持部材５３−１の脱落及び品質安定性の観点から、第一保持部材５３−１は多孔質材であるのが好ましく、焼結体又は発泡材により構成される。多孔質材からなる第一保持部材５３−１の材質は、ポリエチレン、ポリアミド、ポリフェニレンサルファイド等の高分子材、又は、金属材である。耐熱性を考慮すると、第一保持部材５３−１は金属製の多孔質材であるのが好ましい。連続空孔を多数形成するために、第一保持部材５３−１は、金属粉末を焼結によって成形した金属焼結材であるのが好ましい。 Although the first holding member 53-1 of the present disclosure is a porous material, it may be a fibrous body obtained by compressing a fibrous material such as wool and molding it into a predetermined shape. Even in this case, the first holding member 53-1 is capable of permeating and exuding oil. However, from the viewpoint of the first holding member 53-1 falling off and the quality stability, the first holding member 53-1 is preferably a porous material, and is composed of a sintered body or a foamed material. The material of the first holding member 53-1 made of a porous material is a polymer material such as polyethylene, polyamide, polyphenylene sulfide, or a metal material. Considering heat resistance, the first holding member 53-1 is preferably a porous metal material. In order to form a large number of continuous pores, the first holding member 53-1 is preferably a metal sintered material obtained by sintering a metal powder.

収容部５１のグリース５６に含まれる基油が、第一取り付け部材５２−１の貫通穴６３−１を通過すると、第一保持部材５３−１に毛細管現象によって浸透する。第一保持部材５３−１に浸透した基油は、第一取り付け部材５２−１の円筒部６０−１の内周面６７に、基油の表面張力によって、滲み出ることができる。そして、第一保持部材５３−１から滲み出た基油は、円筒部６０−１の内周面６７を通じて、軸方向一方側の外側軌道面２６に供給される。 When the base oil contained in the grease 56 of the accommodating portion 51 passes through the through hole 63-1 of the first mounting member 52-1, it permeates into the first holding member 53-1 by a capillary phenomenon. The base oil that has permeated the first holding member 53-1 can seep out to the inner peripheral surface 67 of the cylindrical portion 60-1 of the first mounting member 52-1 due to the surface tension of the base oil. Then, the base oil exuded from the first holding member 53-1 is supplied to the outer raceway surface 26 on one side in the axial direction through the inner peripheral surface 67 of the cylindrical portion 60-1.

これに対して、収容部５１のグリース５６に含まれる基油以外の成分、つまり、増ちょう剤（及び添加剤）については、第一保持部材５３−１への侵入が阻害される。このため、油以外の成分が外側軌道面２６に到達するのを防止することができる。基油が第一保持部材５３−１において詰まり難くなり、グリース５６から外側軌道面２６への基油の供給経路において、安定した給油性能が維持される。なお、増ちょう剤等の基油以外の成分が外側軌道面２６と転動体１６との間に噛み込むと、一時的にトルクが増大する場合がある。 On the other hand, the components other than the base oil contained in the grease 56 of the accommodating portion 51, that is, the thickener (and the additive), are prevented from entering the first holding member 53-1. Therefore, it is possible to prevent components other than oil from reaching the outer raceway surface 26. The base oil is less likely to be clogged in the first holding member 53-1, and stable oil supply performance is maintained in the base oil supply path from the grease 56 to the outer raceway surface 26. If a component other than the base oil, such as a thickener, gets caught between the outer raceway surface 26 and the rolling element 16, the torque may temporarily increase.

第一取り付け部材５２−１において、円筒部６０−１の内周面６７は、研削面又は研磨面であるのが好ましい。内周面６７が研削面又は研磨面であることにより、第一保持部材５３−１から滲み出た基油は、内周面６７を経由して外側軌道面２６に向けて誘導されやすくなる。仮に、内周面６７が切削面である場合、基油は、螺旋状となる切削溝に沿って流れやすくなる。つまり、基油は周方向に流れやすくなる。しかし、本開示では、内周面６７が、研削面又は研磨面である。このため、内周面６７が切削面である場合と比較して、基油が第一保持部材５３−１から内周面６７を通じて外側軌道面２６に向かう方向（軸方向）に流れ易くなる。 In the first mounting member 52-1, the inner peripheral surface 67 of the cylindrical portion 60-1 is preferably a ground surface or a polished surface. Since the inner peripheral surface 67 is a ground surface or a polished surface, the base oil exuded from the first holding member 53-1 is likely to be guided toward the outer raceway surface 26 via the inner peripheral surface 67. If the inner peripheral surface 67 is a cutting surface, the base oil tends to flow along the spiral cutting groove. That is, the base oil easily flows in the circumferential direction. However, in the present disclosure, the inner peripheral surface 67 is a ground surface or a polished surface. Therefore, as compared with the case where the inner peripheral surface 67 is the cutting surface, the base oil is more likely to flow in the direction (axial direction) from the first holding member 53-1 to the outer raceway surface 26 through the inner peripheral surface 67.

円筒部６０−１の内周面６７のうち、第一保持部材５３−１から端部６６ａまでの間の表面は、研削面又は研磨面であると共に（又は、研削面又は研磨面である代わりに）親油性コーティングを有していてもよい。親油性コーティング以外として、前記表面に、テクスチャ加工又は静電植毛処理等による油誘導処理が施されていてもよい。この場合、前記表面は、テクスチャ面又は静電植毛処理面等による油誘導面を有する。 Of the inner peripheral surface 67 of the cylindrical portion 60-1, the surface between the first holding member 53-1 and the end portion 66a is a ground surface or a polished surface (or instead of being a ground surface or a polished surface). It may have a lipophilic coating. In addition to the lipophilic coating, the surface may be subjected to an oil induction treatment such as a texture treatment or an electrostatic flocking treatment. In this case, the surface has an oil-guided surface such as a textured surface or an electrostatic flocking treated surface.

これに対して、円筒部６０−１の外周面６８は、旋盤による旋削面、又は、ブラスト面（ブラスト加工面）であるのが好ましい。これは、外方部材１２に対する円筒部６０−１のアンカー作用による固定力を高めるためである。 On the other hand, the outer peripheral surface 68 of the cylindrical portion 60-1 is preferably a lathe-turned surface or a blasted surface (blasted surface). This is to increase the fixing force due to the anchoring action of the cylindrical portion 60-1 on the outer member 12.

内周面６７のうち、第一保持部材５３−１から端部６６ａまでの間の表面には、油が塗布されている。前記表面に塗布されている油は、グリース５６に含まれる基油と同じ種類であればよい。これにより、第一保持部材５３−１と円筒部６０−１との間において、基油の移動が行われやすい。
また、内周面６７の軸方向端部は傾斜面６９となっている。傾斜面６９は、軸方向の端に向かうにしたがって内径が大きくなる形状を有する。傾斜面６９によれば、円筒部６０−１の内周面６７と外側軌道面２６との間で、基油が流れやすくなる。 Oil is applied to the surface of the inner peripheral surface 67 between the first holding member 53-1 and the end portion 66a. The oil applied to the surface may be the same type as the base oil contained in the grease 56. As a result, the base oil can be easily moved between the first holding member 53-1 and the cylindrical portion 60-1.
Further, the axial end portion of the inner peripheral surface 67 is an inclined surface 69. The inclined surface 69 has a shape in which the inner diameter increases toward the end in the axial direction. According to the inclined surface 69, the base oil easily flows between the inner peripheral surface 67 of the cylindrical portion 60-1 and the outer raceway surface 26.

以上より、本開示の転がり軸受装置１０によれば、収容部５１のグリース５６の基油を外側軌道面２６に供給することができ、潤滑性能を確保することが可能である。グリース５６の増ちょう剤（及び添加剤）等の油以外の成分は、外側軌道面２６に到達するのを防ぎ、トルクが増大するのを防止することが可能となる。 From the above, according to the rolling bearing device 10 of the present disclosure, the base oil of the grease 56 of the accommodating portion 51 can be supplied to the outer raceway surface 26, and the lubrication performance can be ensured. Components other than oil, such as the thickener (and additive) of the grease 56, can be prevented from reaching the outer raceway surface 26, and the torque can be prevented from increasing.

本開示の転がり軸受装置１０では、収容部５１のグリース５６から第一保持部材５３−１への毛細管現象による基油の移動と、第一保持部材５３−１から第一取り付け部材５２−１側への基油の表面張力による移動とが、調和して生じる。例えば、軸方向一方側の外側軌道面２６側に基油が充分に存在する場合、第一保持部材５３−１から第一取り付け部材５２−１（内周面６７）へは基油の供給が行われ難く、また、グリース５６から第一保持部材５３−１へ基油の移動は行われ難い。このため、給油対象である外側軌道面２６等に対して、基油の微量供給が可能となる。つまり、外側軌道面２６及び転動体１６において、基油が多くなりすぎず、適切な潤滑が可能となり、軸受回転による基油の撹拌抵抗の増加が抑えられる。 In the rolling bearing device 10 of the present disclosure, the movement of the base oil due to the capillary phenomenon from the grease 56 of the accommodating portion 51 to the first holding member 53-1 and the movement of the base oil from the first holding member 53-1 to the first mounting member 52-1 side. The movement of the base oil to the surface tension due to the surface tension occurs in harmony. For example, when a sufficient amount of base oil is present on the outer raceway surface 26 on one side in the axial direction, the base oil is supplied from the first holding member 53-1 to the first mounting member 52-1 (inner peripheral surface 67). It is difficult to move the base oil from the grease 56 to the first holding member 53-1. Therefore, a small amount of base oil can be supplied to the outer raceway surface 26 or the like to be refueled. That is, on the outer raceway surface 26 and the rolling element 16, the amount of base oil does not become too large, appropriate lubrication is possible, and an increase in agitation resistance of the base oil due to bearing rotation is suppressed.

〔本開示の転がり軸受装置１０について〕
以上のように、本開示の転がり軸受装置１０は、内方部材１４と、外方部材１２と、これら内方部材１４と外方部材１２との間に介在している複数の転動体１６とを備える。更に、転がり軸受装置１０は、外方部材１２に軸方向間隔をあけて取り付けられている第一取り付け部材５２−１及び第二取り付け部材５２−２と、第一取り付け部材５２−１及び第二取り付け部材５２−２に固定されていてグリース５６の基油を浸透させて保持する第一保持部材５３−１及び第二保持部材５３−２とを備える。 [About the rolling bearing device 10 of the present disclosure]
As described above, the rolling bearing device 10 of the present disclosure includes the inner member 14, the outer member 12, and the plurality of rolling elements 16 interposed between the inner member 14 and the outer member 12. To be equipped. Further, in the rolling bearing device 10, the first mounting member 52-1 and the second mounting member 52-2, and the first mounting member 52-1 and the second mounting member 52-1 and the second mounting member 52-1 and the second mounting member 52-1 are mounted on the outer member 12 at an axial interval. It includes a first holding member 53-1 and a second holding member 53-2 which are fixed to the mounting member 52-2 and which permeate and hold the base oil of the grease 56.

第一取り付け部材５２−１と第二取り付け部材５２−２との間が、グリース５６を収容する収容部５１である。第一取り付け部材５２−１は、収容部５１のグリース５６の基油を通過させて第一保持部材５３−１に供給するための貫通穴６３−１を少なくとも一つ有する。第二取り付け部材５２−２は、収容部５１のグリース５６の基油を通過させて第二保持部材５３−２に供給するための貫通穴６３−２を少なくとも一つ有する。 Between the first mounting member 52-1 and the second mounting member 52-2 is an accommodating portion 51 for accommodating the grease 56. The first mounting member 52-1 has at least one through hole 63-1 for passing the base oil of the grease 56 of the accommodating portion 51 and supplying it to the first holding member 53-1. The second mounting member 52-2 has at least one through hole 63-2 for passing the base oil of the grease 56 of the accommodating portion 51 and supplying it to the second holding member 53-2.

このような転がり軸受装置１０によれば、第一保持部材５３−１（第二保持部材５３−２）から基油が滲み出て消費されても、第一保持部材５３−１（第二保持部材５３−２）には収容部５１のグリース５６から基油が補充される。このため、転がり軸受装置１０の潤滑性を長期にわたって維持することが可能となる。また、グリース５６そのものが外側軌道面２６，２６及び転動体１６に供給されるのではなく、グリース５６に含まれる基油が供給される。このため、グリース５６の撹拌及びグリース５６の噛み込み等により回転抵抗が増加するのを防ぐことが可能となる。 According to such a rolling bearing device 10, even if the base oil seeps out from the first holding member 53-1 (second holding member 53-2) and is consumed, the first holding member 53-1 (second holding member 53-1) is consumed. The base oil is replenished from the grease 56 of the accommodating portion 51 to the member 53-2). Therefore, the lubricity of the rolling bearing device 10 can be maintained for a long period of time. Further, the grease 56 itself is not supplied to the outer raceway surfaces 26, 26 and the rolling elements 16, but the base oil contained in the grease 56 is supplied. Therefore, it is possible to prevent the rotational resistance from increasing due to the stirring of the grease 56 and the biting of the grease 56.

また、グリース５６を収容する収容部５１は、外方部材１２に設けられるのではなく、第一取り付け部材５２−１と第二取り付け部材５２−２との間に設けられる。このため、外方部材１２については従来の構成をそのまま採用することが可能となり、また、収容部５１を可能な限り広くして、より多くのグリース５６を収容することが可能となる。 Further, the accommodating portion 51 for accommodating the grease 56 is not provided on the outer member 12, but is provided between the first attachment member 52-1 and the second attachment member 52-2. Therefore, it is possible to adopt the conventional configuration as it is for the outer member 12, and it is possible to make the accommodating portion 51 as wide as possible to accommodate a larger amount of grease 56.

また、本開示の転がり軸受装置１０では、第一取り付け部材５２−１は、外方部材１２に密着して取り付けられている円筒部６０−１と、円筒部６０−１から径方向内方に延びて設けられている立壁部７１−１と、係合部７２−１とを有する。第一保持部材５３−１は、円筒部６０−１と立壁部７１−１と係合部７２−１との間に形成される空間に収容されている。係合部７２−１は、第一保持部材５３−１と係合していて、第一保持部材５３−１が軸方向に脱落するのを阻止する。 Further, in the rolling bearing device 10 of the present disclosure, the first mounting member 52-1 is radially inward from the cylindrical portion 60-1 and the cylindrical portion 60-1 which are closely attached to the outer member 12. It has a vertical wall portion 71-1 provided so as to extend and an engaging portion 72-1. The first holding member 53-1 is housed in a space formed between the cylindrical portion 60-1 and the standing wall portion 71-1 and the engaging portion 72-1. The engaging portion 72-1 is engaged with the first holding member 53-1 to prevent the first holding member 53-1 from falling off in the axial direction.

この構成により、第一取り付け部材５２−１と第一保持部材５３−１とが一体となる。そして、その第一取り付け部材５２−１の円筒部６０−１は外方部材１２に密着して取り付けられるため移動不能である。このような第一取り付け部材５２−１によれば、第一保持部材５３−１が比較的弾性変形しやすい構造であったとしても、その第一保持部材５３−１は移動しないようにして第一取り付け部材５２−１を介して外方部材１２に取り付けられる。 With this configuration, the first mounting member 52-1 and the first holding member 53-1 are integrated. The cylindrical portion 60-1 of the first attachment member 52-1 is immovable because it is attached in close contact with the outer member 12. According to such a first mounting member 52-1, even if the first holding member 53-1 has a structure that is relatively easily elastically deformed, the first holding member 53-1 is prevented from moving. It is attached to the outer member 12 via the attachment member 52-1.

また、第二取り付け部材５２−２及び第二保持部材５３−２についても、第一取り付け部材５２−１及び第一保持部材５３−１と、同様の構成を有する。よって、第二保持部材５３−２は移動しないようにして第二取り付け部材５２−２を介して外方部材１２に取り付けられる。 Further, the second mounting member 52-2 and the second holding member 53-2 have the same configuration as the first mounting member 52-1 and the first holding member 53-1. Therefore, the second holding member 53-2 is attached to the outer member 12 via the second attachment member 52-2 without moving.

本開示では、転動体１６は、内方部材１４と外方部材１２との間に形成される環状空間１５に二列となって設けられている。給油部５０、つまり、第一取り付け部材５２−１、第一保持部材５３−１、第二取り付け部材５２−２、第二保持部材５３−２、及び収容部５１は、一方の転動体１６の列と他方の転動体１６の列との間に設けられている。このため、一つの給油部５０から、一方の転動体１６の列及び他方の転動体１６の列それぞれに対して基油の供給が可能となる。 In the present disclosure, the rolling elements 16 are provided in two rows in an annular space 15 formed between the inner member 14 and the outer member 12. The refueling section 50, that is, the first mounting member 52-1, the first holding member 53-1, the second mounting member 52-2, the second holding member 53-2, and the accommodating section 51 is one of the rolling elements 16. It is provided between the row and the row of the other rolling element 16. Therefore, the base oil can be supplied from one refueling unit 50 to each of the row of one rolling element 16 and the row of the other rolling element 16.

〔その他〕
前記の形態では、外方部材１２に給油部５０が設けられているが、内方部材１４に給油部５０が設けられていてもよい。特に、転がり軸受装置１０が車輪用転がり軸受装置ではなく、外方部材１２が回転輪となり、内方部材１４が固定輪となる転がり軸受装置の場合、内方部材１４に給油部５０が設けられる。つまり、図示しないが（図２を参考に説明すると）、第一取り付け部材５２−１及び第二取り付け部材５２−２が、内方部材１４に軸方向に間隔をあけて取り付けられる。第一取り付け部材５２−１に第一保持部材５３−１が固定されていて、第二取り付け部材５２−２に第二保持部材５３−２が固定される。 [Other]
In the above-described embodiment, the outer member 12 is provided with the refueling unit 50, but the inner member 14 may be provided with the refueling unit 50. In particular, in the case where the rolling bearing device 10 is not a rolling bearing device for wheels, but a rolling bearing device in which the outer member 12 is a rotating wheel and the inner member 14 is a fixed wheel, the inner member 14 is provided with a refueling unit 50. .. That is, although not shown (explained with reference to FIG. 2), the first attachment member 52-1 and the second attachment member 52-2 are attached to the inner member 14 at intervals in the axial direction. The first holding member 53-1 is fixed to the first mounting member 52-1, and the second holding member 53-2 is fixed to the second mounting member 52-2.

前記の形態では、転動体１６は、玉であるが、ころであってもよい。
また、潤滑剤としてグリース５６が用いられる場合について説明したが、油を含む半固体状である潤滑剤は、グリース５６以外であってもよい。
前記給油部５０を、転がり軸受装置１０に適用する他に、滑り軸受又は歯車にも適用可能である。 In the above form, the rolling element 16 is a ball, but may be a roller.
Further, although the case where the grease 56 is used as the lubricant has been described, the semi-solid lubricant containing oil may be other than the grease 56.
In addition to applying the lubrication unit 50 to the rolling bearing device 10, it can also be applied to a slide bearing or a gear.

今回開示した実施形態はすべての点で例示であって制限的なものではない。本発明の技術的範囲は前述の実施形態に限定されるものではなく、この技術的範囲には特許請求の範囲に記載された構成と均等の範囲内でのすべての変更が含まれる。 The embodiments disclosed this time are exemplary in all respects and are not restrictive. The technical scope of the present invention is not limited to the above-described embodiment, and the technical scope includes all modifications within a range equivalent to the configuration described in the claims.

１０：転がり軸受装置 １２：外方部材 １４：内方部材
１６：転動体 ２６：外側軌道面 ４２：軸軌道面
４４：内輪軌道面 ５１：収容部 ５２−１：第一取り付け部材
５２−２：第二取り付け部材 ５３−１：第一保持部材
５３−２：第二保持部材 ５６：グリース（潤滑剤）
６０−１，６０−２：円筒部 ６３−１，６３−２：貫通穴
７１−１，７１−２：立壁部 ７２−１，７２−２：係合部
７５：第一折り曲げ部 ７６：第二折り曲げ部 10: Rolling bearing device 12: Outer member 14: Inner member 16: Rolling element 26: Outer raceway surface 42: Axle raceway surface 44: Inner ring raceway surface 51: Accommodating part 52-1: First mounting member 52-2: Second mounting member 53-1: First holding member 53-2: Second holding member 56: Grease (lubricant)
60-1, 60-2: Cylindrical part 63-1, 63-2: Through hole 71-1, 71-2: Standing wall part 72-1, 72-2: Engagement part 75: First bent part 76: No. Folded part

Claims (5)

外周に軌道を有する内方部材と、
内周に軌道を有する外方部材と、
前記内方部材と前記外方部材との間に介在し前記軌道を転動する複数の転動体と、
前記内方部材と前記外方部材とのうちの一方の軌道部材に軸方向間隔をあけて取り付けられている第一取り付け部材及び第二取り付け部材と、
前記第一取り付け部材及び前記第二取り付け部材に固定され潤滑剤の油を浸透させて保持する第一保持部材及び第二保持部材と、
を備え、
前記第一取り付け部材と前記第二取り付け部材との間が、半固体状である潤滑剤を収容する収容部であり、
前記第一取り付け部材は、前記収容部の前記潤滑剤の油を通過させて前記第一保持部材に供給するための貫通穴を少なくとも一つ有し、前記第二取り付け部材は、前記収容部の前記潤滑剤の油を通過させて前記第二保持部材に供給するための貫通穴を少なくとも一つ有する、転がり軸受装置。 An inner member with a track on the outer circumference and
An outer member with an orbit on the inner circumference and
A plurality of rolling elements intervening between the inner member and the outer member and rolling on the orbit,
A first mounting member and a second mounting member that are mounted at an axial interval on one of the track members of the inner member and the outer member.
A first holding member and a second holding member fixed to the first mounting member and the second mounting member to permeate and hold the oil of the lubricant.
With
Between the first mounting member and the second mounting member is an accommodating portion for accommodating a semi-solid lubricant.
The first mounting member has at least one through hole for passing the oil of the lubricant of the housing portion and supplying the first holding member, and the second mounting member is of the housing portion. A rolling bearing device having at least one through hole for passing the oil of the lubricant and supplying it to the second holding member. 前記第一取り付け部材は、前記軌道部材に密着して取り付けられている円筒部と、当該円筒部から径方向に延びて設けられている立壁部と、前記立壁部の径方向端部から前記円筒部と対向するように延びて設けられ前記第一保持部材と係合し当該第一保持部材が軸方向に脱落するのを阻止する係合部と、を有し、
前記第一保持部材は、前記円筒部と前記立壁部と前記係合部との間に形成される空間に収容されている、請求項１に記載の転がり軸受装置。 The first mounting member includes a cylindrical portion that is closely attached to the track member, a vertical wall portion that extends radially from the cylindrical portion, and the cylindrical portion from the radial end portion of the vertical wall portion. It has an engaging portion that extends so as to face the portion and engages with the first holding member to prevent the first holding member from falling off in the axial direction.
The rolling bearing device according to claim 1, wherein the first holding member is housed in a space formed between the cylindrical portion, the standing wall portion, and the engaging portion. 前記円筒部と前記立壁部との間に第一折り曲げ部が介在し、前記立壁部と前記係合部との間に第二折り曲げ部が介在している、請求項２に記載の転がり軸受装置。 The rolling bearing device according to claim 2, wherein a first bent portion is interposed between the cylindrical portion and the standing wall portion, and a second bent portion is interposed between the standing wall portion and the engaging portion. .. 前記転動体は、前記内方部材と前記外方部材との間に形成される環状空間に二列となって設けられていて、
前記第一取り付け部材、前記第一保持部材、前記第二取り付け部材、前記第二保持部材、及び前記収容部は、一方の前記転動体の列と他方の前記転動体の列との間に設けられている、請求項１〜３のいずれか一項に記載の転がり軸受装置。 The rolling elements are provided in two rows in an annular space formed between the inner member and the outer member.
The first mounting member, the first holding member, the second mounting member, the second holding member, and the accommodating portion are provided between one row of the rolling elements and the other row of the rolling elements. The rolling bearing device according to any one of claims 1 to 3. 前記潤滑剤は、前記油としての基油、及び増ちょう剤を含むグリースである、請求項１〜４のいずれか一項に記載の転がり軸受装置。 The rolling bearing device according to any one of claims 1 to 4, wherein the lubricant is a grease containing a base oil as the oil and a thickener.
JP2019213228A 2019-11-26 2019-11-26 Rolling bearing device Pending JP2021085435A (en)

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JP4396037B2 (en) * 2000-04-20 2010-01-13 日本精工株式会社 Lubricating device for rolling bearings
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