JP2010169142A - Roller bearing lubricating structure for planetary gear mechanism - Google Patents

Roller bearing lubricating structure for planetary gear mechanism Download PDF

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JP2010169142A
JP2010169142A JP2009010777A JP2009010777A JP2010169142A JP 2010169142 A JP2010169142 A JP 2010169142A JP 2009010777 A JP2009010777 A JP 2009010777A JP 2009010777 A JP2009010777 A JP 2009010777A JP 2010169142 A JP2010169142 A JP 2010169142A
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planetary gear
oil
roller bearing
gear mechanism
lubricating oil
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Ikuo Ito
育夫 伊藤
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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • 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
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6648—Retaining the liquid in or near the bearing in a porous or resinous body, e.g. a cage impregnated with the liquid
    • 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
    • F16C33/6677—Details of supply of the liquid to the bearing, e.g. passages or nozzles from radial inside, e.g. via a passage through the shaft and/or inner ring
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0479—Gears or bearings on planet carriers
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without race rings
    • 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)
  • General Details Of Gearings (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller bearing lubricating structure for a planetary gear mechanism, resupplying lubricating oil into a roller bearing even when the supply of the lubricating oil from a hydraulic source to an oil path in the center shaft of a planetary gear is stopped. <P>SOLUTION: To supply lubricating oil into the roller bearing 10 which is arranged between a center hole 5 and the center shaft 6 of the planetary gear 4 of the planetary gear mechanism 1, the oil path 7 is formed in the center shaft 6 in communication with the hydraulic source. A cage 20 of the roller bearing 10 has an oil-bearing member 50 which holds the lubricating oil supplied through the oil path 7 in the center shaft 6 in a releasable manner. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は遊星歯車機構におけるころ軸受の潤滑構造に関する。   The present invention relates to a lubrication structure for a roller bearing in a planetary gear mechanism.

自動車のハイブリッド駆動ユニットやオートマチックトランスミッション等に採用される遊星歯車機構において、遊星歯車（プラネタリギヤ）は、キャリアに組み付けられる中心軸の外周にころ軸受を介して回転可能に支持される。そして、遊星歯車は、太陽歯車（サンギヤ）とリングギヤとの相互に噛み合った状態で、中心軸回りに自転しながら太陽歯車回りに公転するようになっている。
また、ころ軸受（針状ころ軸受も含む）は、遊星歯車の中心孔と中心軸との間に組み込まれる複数のころと、これら複数のころを転動可能に保持する保持器とを備えている。
この種の遊星歯車機構におけるころ軸受において、ころ軸受に潤滑油を供給するために、中心軸に油路（油孔）が形成され、この油路がエンジンのクランクシャフトにベルト等の動力伝達部材によってトルク伝達可能に接続されたオイルポンプ（油圧源）に接続されたものが知られている。
なお、遊星歯車機構のころ軸受に潤滑油を供給する潤滑構造においては、例えば、特許文献１に開示されている。 In a planetary gear mechanism employed in a hybrid drive unit of an automobile, an automatic transmission, or the like, a planetary gear (planetary gear) is rotatably supported on the outer periphery of a central shaft assembled to a carrier via a roller bearing. The planetary gear revolves around the sun gear while rotating around the central axis while the sun gear (sun gear) and the ring gear mesh with each other.
The roller bearing (including the needle roller bearing) includes a plurality of rollers incorporated between the center hole and the center shaft of the planetary gear, and a cage that holds the plurality of rollers in a rollable manner. Yes.
In a roller bearing in this type of planetary gear mechanism, in order to supply lubricating oil to the roller bearing, an oil path (oil hole) is formed in the center shaft, and this oil path is a power transmission member such as a belt on the crankshaft of the engine. Is connected to an oil pump (hydraulic power source) connected so as to be able to transmit torque.
In addition, in the lubrication structure which supplies lubricating oil to the roller bearing of a planetary gear mechanism, it is disclosed by patent document 1, for example.

特開２００４−３２４８４４号公報JP 2004-324844 A

ところで、遊星歯車機構が、例えば、エンジンとモータとの動力を分配するハイブリッド駆動ユニットに採用された場合、モータ駆動による走行時において、エンジンが停止状態になると、エンジンと連動するオイルポンプ（油圧源）も停止する。
そして、オイルポンプの停止によって遊星歯車の中心軸の油路に対する潤滑油の供給が止められ無給油状態となる。
このため、エンジン停止状態でモータ駆動による走行時間が長くなると、ころ軸受内の潤滑油が不足して軸受不良をまねく恐れがある。 By the way, when the planetary gear mechanism is employed in, for example, a hybrid drive unit that distributes the power of the engine and the motor, when the engine is stopped during driving by the motor drive, ) Also stops.
Then, when the oil pump is stopped, the supply of the lubricating oil to the oil passage of the central shaft of the planetary gear is stopped and the oil-free state is entered.
For this reason, if the running time by the motor drive becomes long while the engine is stopped, the lubricating oil in the roller bearing is insufficient, which may cause a bearing failure.

この発明の目的は、前記問題点に鑑み、遊星歯車の中心軸の油路に対する油圧源からの潤滑油の供給が停止された場合においても、ころ軸受内に潤滑油を補給することができる遊星歯車機構におけるころ軸受の潤滑構造を提供することである。   In view of the above problems, an object of the present invention is to provide a planetary gear capable of supplying lubricating oil into a roller bearing even when the supply of lubricating oil from a hydraulic source to the oil passage of the central shaft of the planetary gear is stopped. A lubrication structure for a roller bearing in a gear mechanism is provided.

前記課題を解決するために、この発明の請求項１に係る遊星歯車機構におけるころ軸受の潤滑構造は、遊星歯車機構の遊星歯車の中心孔と中心軸との間に配置されるころ軸受に潤滑油を供給するために、油圧源に通じる油路が前記中心軸に形成された遊星歯車機構におけるころ軸受の潤滑構造であって、
前記ころ軸受の保持器には、前記中心軸の油路を通して供給される潤滑油を放出可能に保持する含油部材が設けられていることを特徴とする。 In order to solve the above problems, a lubricating structure of a roller bearing in a planetary gear mechanism according to claim 1 of the present invention lubricates a roller bearing disposed between a central hole and a central shaft of the planetary gear of the planetary gear mechanism. In order to supply oil, a lubricating structure of a roller bearing in a planetary gear mechanism in which an oil passage leading to a hydraulic pressure source is formed on the central shaft,
The roller bearing retainer is provided with an oil-containing member that releasably holds the lubricating oil supplied through the oil passage of the central shaft.

前記構成によると、軸受回転時において、油圧源から供給される潤滑油は中心軸の油路を通してころ軸受内に供給される。
また、軸受回転時において、中心軸の油路に対する油圧源からの潤滑油の供給が停止された状態となったときには、ころ軸受の保持器に設けられた含油部材に保持された潤滑油が遠心力の作用を受けて放出される。これによって、軸受内に潤滑油を補給することができるため、潤滑油の不足による軸受不良（例えば、摩耗や、焼き付き等）を抑制することができる。 According to the above configuration, when the bearing rotates, the lubricating oil supplied from the hydraulic pressure source is supplied into the roller bearing through the oil passage of the central shaft.
In addition, when the supply of the lubricating oil from the hydraulic source to the oil passage of the central shaft is stopped during the rotation of the bearing, the lubricating oil held in the oil-impregnated member provided in the roller bearing retainer is centrifuged. Released under the action of force. Thereby, since lubricating oil can be replenished in a bearing, the bearing defect (for example, abrasion, seizure, etc.) by lack of lubricating oil can be suppressed.

請求項２に係る遊星歯車機構におけるころ軸受の潤滑構造は、請求項１に記載の遊星歯車機構におけるころ軸受の潤滑構造であって、
含油部材は層状をなして保持器の内径面に貼り付けられていることを特徴とする。 The lubricating structure of the roller bearing in the planetary gear mechanism according to claim 2 is the lubricating structure of the roller bearing in the planetary gear mechanism according to claim 1,
The oil-impregnated member is layered and is affixed to the inner diameter surface of the cage.

前記構成によると、保持器の内径面に含油部材が層状をなして貼り付けられることによって、遊星歯車の中心孔の内周面（外輪軌道面）に対する含油部材の接触が回避される。
言い換えると、保持器の外径面に含油部材が貼り付けられると、この含油部材が遊星歯車の中心孔の内周面に接触して摩耗され、潤滑油の保持機能が低下することがあるが、保持器の内径面に含油部材が層状をなして貼り付けられることによって、含油部材の摩耗を防止することができ、長期間にわたって潤滑油の保持機能を維持することができ、耐久性に優れる。 According to the above configuration, the oil-impregnated member is affixed to the inner diameter surface of the cage in a layered manner, thereby preventing the oil-impregnated member from contacting the inner peripheral surface (outer ring raceway surface) of the center hole of the planetary gear.
In other words, when the oil-impregnated member is affixed to the outer diameter surface of the cage, the oil-impregnated member may be contacted with the inner peripheral surface of the center hole of the planetary gear and worn, thereby reducing the lubricating oil retaining function. The oil-impregnated member is affixed in a layered manner to the inner diameter surface of the cage, so that the oil-impregnated member can be prevented from being worn, and the lubricating oil retaining function can be maintained over a long period of time, resulting in excellent durability. .

請求項３に係る遊星歯車機構におけるころ軸受の潤滑構造は、遊星歯車機構の遊星歯車の中心孔と中心軸との間に配置されるころ軸受に潤滑油を供給するために、油圧源に通じる油路が前記中心軸に形成された遊星歯車機構におけるころ軸受の潤滑構造であって、
前記油路には、潤滑油を放出可能に保持する含油部材が配設されていることを特徴とする。 The lubricating structure of the roller bearing in the planetary gear mechanism according to claim 3 leads to a hydraulic pressure source for supplying lubricating oil to the roller bearing disposed between the center hole and the center shaft of the planetary gear of the planetary gear mechanism. A lubricating structure of a roller bearing in a planetary gear mechanism in which an oil passage is formed on the central shaft,
The oil passage is provided with an oil-containing member that releasably holds the lubricating oil.

前記構成によると、軸受回転時において、油圧源から供給される潤滑油は中心軸の油路を通してころ軸受内に供給される。
また、軸受回転時において、中心軸の油路に対する油圧源からの潤滑油の供給が停止された状態となったときには、油路に配設の含油部材に保持された潤滑油が遠心力の作用を受けて放出される。これによって、軸受内に潤滑油を補給することができるため、潤滑油の不足による軸受不良（例えば、摩耗や、焼き付き等）を抑制することができる。 According to the above configuration, when the bearing rotates, the lubricating oil supplied from the hydraulic pressure source is supplied into the roller bearing through the oil passage of the central shaft.
Further, when the supply of the lubricating oil from the hydraulic source to the oil passage of the central shaft is stopped during the rotation of the bearing, the lubricating oil held by the oil-containing member disposed in the oil passage is subjected to the action of centrifugal force. And released. Thereby, since lubricating oil can be replenished in a bearing, the bearing defect (for example, abrasion, seizure, etc.) by lack of lubricating oil can be suppressed.

この発明の実施例１に係る遊星歯車機構を簡略化して示す説明図である。It is explanatory drawing which simplifies and shows the planetary gear mechanism which concerns on Example 1 of this invention. 同じく遊星歯車と中心軸との間にころ軸受が組み付けられた状態を示す縦断面図である。It is a longitudinal section showing the state where a roller bearing was similarly assembled between a planetary gear and a central axis. 同じくころ軸受の保持器を拡大して示す縦断面である。It is the longitudinal section which expands and similarly shows the cage of a roller bearing. この発明の実施例２に係る遊星歯車機構の遊星歯車の中心軸に形成された油路に含油部材が配設された状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state by which the oil impregnation member was arrange | positioned in the oil path formed in the center axis | shaft of the planetary gear of the planetary gear mechanism which concerns on Example 2 of this invention.

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

この発明の実施例１を図１〜図３にしたがって説明する。
図１はこの発明の実施例１に係る遊星歯車機構を簡略化して示す説明図である。図２は遊星歯車と中心軸との間にころ軸受が組み付けられた状態を示す縦断面図である。図３はころ軸受の保持器を拡大して示す縦断面である。 A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is an explanatory diagram showing a simplified planetary gear mechanism according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view showing a state in which the roller bearing is assembled between the planetary gear and the central shaft. FIG. 3 is an enlarged longitudinal sectional view showing a roller bearing cage.

図１に示すように、自動車のハイブリッド駆動ユニットやオートマチックトランスミッションに採用される遊星歯車機構１は、周知のように、太陽歯車（サンギヤ）２、リングギヤ３及び複数（図１では３つ）の遊星歯車（プラネタリギヤ）４を備えて構成される。
図２に示すように、遊星歯車４は、キャリア８に組み付けられる中心軸６の外周にころ軸受（針状ころ軸受も含む）１０を介して回転可能に支持される。
そして、遊星歯車４は、太陽歯車２とリングギヤ３との相互に噛み合った状態で、中心軸６回りに自転しながら太陽歯車２回りに公転するようになっている。 As shown in FIG. 1, a planetary gear mechanism 1 employed in a hybrid drive unit or an automatic transmission of an automobile includes a sun gear (sun gear) 2, a ring gear 3, and a plurality of (three in FIG. 1) planets, as is well known. A gear (planetary gear) 4 is provided.
As shown in FIG. 2, the planetary gear 4 is rotatably supported on the outer periphery of the center shaft 6 assembled to the carrier 8 via a roller bearing (including a needle roller bearing) 10.
The planetary gear 4 revolves around the sun gear 2 while rotating around the central axis 6 while the sun gear 2 and the ring gear 3 mesh with each other.

図２に示すように、遊星歯車４の中心軸６には、その中心部の一端面から軸部の中間部にわたって軸方向に延びる横孔７ａと、横孔７ａの奥側端に連通しかつ中心軸６の外周面に開口する径方向の縦孔７ｂとを備えた油路７が形成されている。この油路７は、エンジンのクランクシャフトにベルト等の動力伝達部材によってトルク伝達可能に接続された油圧源としてのオイルポンプに接続される。そして、オイルポンプから供給される潤滑油が中心軸６の油路７を通してころ軸受１０に供給するようになっている。   As shown in FIG. 2, the center shaft 6 of the planetary gear 4 communicates with a lateral hole 7a extending in the axial direction from one end surface of the central portion to an intermediate portion of the shaft portion, and a rear end of the lateral hole 7a. An oil passage 7 having a radial vertical hole 7b that is opened on the outer peripheral surface of the central shaft 6 is formed. The oil passage 7 is connected to an oil pump as a hydraulic power source that is connected to a crankshaft of the engine so that torque can be transmitted by a power transmission member such as a belt. The lubricating oil supplied from the oil pump is supplied to the roller bearing 10 through the oil passage 7 of the center shaft 6.

図２に示すように、ころ軸受１０は、遊星歯車４の中心孔５の内周面を外輪軌道面とし、中心軸６の外周面を内輪軌道として、これら両者間の環状の隙間に組み込まれた複数のころ１１と、これら複数のころ１１を転動可能に保持する保持器２０とを備えている。   As shown in FIG. 2, the roller bearing 10 is incorporated in an annular gap between the planetary gear 4 with the inner peripheral surface of the center hole 5 as an outer ring raceway surface and the outer peripheral surface of the center shaft 6 as an inner ring raceway. A plurality of rollers 11 and a cage 20 that holds the plurality of rollers 11 in a rollable manner are provided.

図３に示すように、保持器２０は、軸方向に所定間隔を隔てる両円環部２１と、これら両円環部２１を連結すると共に、複数のころ１１をそれぞれ個別に収納する複数のポケット２５を区画形成する複数の柱部３０とを一体に備えている。
保持器２０の両円環部２１には、内径側（中心側）に向けて突出された鍔部２２がそれぞれ形成されいる。
また、保持器２０の複数の柱部３０は、複数のころ１１のピッチ円（ＰＣＤ）寸法よりも小径の軸方向中間部３１と、複数のころ１１のピッチ円寸法よりも大径の軸方向両端部３２と、これら軸方向中間部３１及び軸方向両端部３２を連結する傾傾斜連結部３５とを有している。そして、複数の柱部３０の軸方向両端部３２は、両円環部２１と同径をなして連続している。
また、各ポケット２５内のころ１１を抜け止めするために、隣接する柱部３０の相対する面の軸方向中間部３１及び軸方向両端部３２の端面には、ポケット２５内に向けて対向状に突出する抜止爪（図示しない）がそれぞれ突出されている。 As shown in FIG. 3, the retainer 20 includes both annular portions 21 that are spaced apart from each other in the axial direction, and a plurality of pockets that connect the annular portions 21 and individually store the plurality of rollers 11. A plurality of pillar portions 30 that define 25 are integrally provided.
The two annular portions 21 of the cage 20 are respectively formed with flanges 22 protruding toward the inner diameter side (center side).
Further, the plurality of column portions 30 of the cage 20 include an axial middle portion 31 having a smaller diameter than the pitch circle (PCD) size of the plurality of rollers 11 and an axial direction having a larger diameter than the pitch circle size of the plurality of rollers 11. Both end portions 32 and an inclined connecting portion 35 for connecting the axial intermediate portion 31 and the axial end portions 32 are provided. Then, both axial end portions 32 of the plurality of column portions 30 are continuous with the same diameter as the two annular portions 21.
Further, in order to prevent the rollers 11 in the respective pockets 25 from coming off, the end surfaces of the axially intermediate portion 31 and the axially opposite end portions 32 of the opposing surfaces of the adjacent column portions 30 face each other toward the inside of the pocket 25. The retaining claws (not shown) projecting to the projecting portions are respectively projected.

図２と図３に示すように、ころ軸受１０の保持器２０には、中心軸６の油路７を通して供給される潤滑油を放出可能に保持する発含油部材５０が設けられている。
この実施例１において、含油部材５０は、連続気泡の発泡樹脂材、発泡ゴム材等のスポンジ材によってシート状に形成され、保持器２０の内径面、すなわち、両円環部２１及び各柱部３０の内径面に接着剤等によって層状をなして貼り付けられている。 As shown in FIGS. 2 and 3, the cage 20 of the roller bearing 10 is provided with an oil impregnating member 50 that releasably holds the lubricating oil supplied through the oil passage 7 of the center shaft 6.
In the first embodiment, the oil-impregnated member 50 is formed into a sheet shape by a sponge material such as an open-cell foamed resin material or a foamed rubber material, and the inner diameter surface of the cage 20, that is, both the annular portions 21 and the column portions. The inner surface of 30 is affixed in layers with an adhesive or the like.

この実施例１に係る遊星歯車機構におけるころ軸受の潤滑構造は上述したように構成される。
したがって、軸受回転時において、油圧源としてのオイルポンプから供給される潤滑油は遊星歯車４の中心軸６の油路７を通してころ軸受１０内に供給される。
また、軸受回転時において、中心軸６の油路７に対するオイルポンプからの潤滑油の供給が停止された状態となったとき、例えば、エンジンとモータとの動力を分配するハイブリッド駆動ユニットに遊星歯車機構１が採用された場合、モータ駆動による走行時にエンジンが停止状態になったときには、エンジンと連動するオイルポンプも停止する。
この状態、すなわち、中心軸６の油路７に対するオイルポンプからの潤滑油の供給が停止された状態となったときには、ころ軸受１０の保持器２０に設けられた含油部材５０に保持されている潤滑油が遠心力の作用を受けて放出される。これによって、ころ軸受１０内に潤滑油を補給することができる。このため、ころ軸受１０に対する潤滑油の不足による軸受不良（例えば、摩耗や、焼き付き等）を抑制することができる。 The lubricating structure of the roller bearing in the planetary gear mechanism according to the first embodiment is configured as described above.
Therefore, during the rotation of the bearing, the lubricating oil supplied from the oil pump as a hydraulic source is supplied into the roller bearing 10 through the oil passage 7 of the central shaft 6 of the planetary gear 4.
Further, when the supply of the lubricating oil from the oil pump to the oil passage 7 of the central shaft 6 is stopped during the rotation of the bearing, for example, the planetary gear is supplied to the hybrid drive unit that distributes the power of the engine and the motor. When the mechanism 1 is employed, when the engine is stopped during driving by the motor drive, the oil pump interlocked with the engine is also stopped.
In this state, that is, when the supply of the lubricating oil from the oil pump to the oil passage 7 of the central shaft 6 is stopped, the oil retaining member 50 provided in the cage 20 of the roller bearing 10 is held. Lubricating oil is released under the action of centrifugal force. Thereby, lubricating oil can be replenished in the roller bearing 10. For this reason, bearing failure (for example, wear, seizure, etc.) due to lack of lubricating oil for the roller bearing 10 can be suppressed.

また、この実施例１において、保持器２０の内径面に含油部材５０が層状をなして貼り付けられることによって、遊星歯車４の中心孔５の内周面（外輪軌道面）に対する含油部材５０の接触が回避される。
言い換えると、保持器２０の外径面に含油部材５０が貼り付けられると、この含油部材５０が遊星歯車４の中心孔５の内周面に接触して摩耗され、潤滑油の保持機能が低下することがあるが、保持器２０の内径面に含油部材５０が層状をなして貼り付けられることによって、含油部材５０の摩耗を防止することができ、長期間にわたって潤滑油の保持機能を維持することができ、耐久性に優れる。 In the first embodiment, the oil-impregnated member 50 is attached to the inner diameter surface of the cage 20 in a layered manner, whereby the oil-impregnated member 50 with respect to the inner peripheral surface (outer ring raceway surface) of the center hole 5 of the planetary gear 4. Contact is avoided.
In other words, when the oil retaining member 50 is affixed to the outer diameter surface of the cage 20, the oil retaining member 50 comes into contact with the inner peripheral surface of the center hole 5 of the planetary gear 4 and wears down, and the retaining function of the lubricating oil decreases. However, since the oil retaining member 50 is affixed to the inner diameter surface of the cage 20 in a layered manner, the oil retaining member 50 can be prevented from wearing, and the lubricating oil retaining function can be maintained for a long period of time. Can be superior in durability.

次に、この発明の実施例２を図４にしたがって説明する。
図４はこの発明の実施例２に係る遊星歯車機構の遊星歯車の中心軸に形成された油路に含油部材が配設された状態を示す縦断面図である。
図４に示すように、この実施例２においては、遊星歯車４の中心軸６に形成された油路７に、潤滑油を放出可能に保持する含油部材５１が配設されている。
例えば、図４に示すように、中心軸６の中心部に形成された油路７を構成する横孔７ａを実施例１よりも深く形成し、この深くした孔部分を収納部８としてスポンジ材よりなる含油部材５１が収納される。
この実施例２のその他の構成は、実施例１と同様に構成されるため、同一構成部分に対し同一符号を付記してその説明は省略する。 Next, a second embodiment of the present invention will be described with reference to FIG.
4 is a longitudinal sectional view showing a state in which an oil impregnation member is disposed in an oil passage formed in the central axis of the planetary gear of the planetary gear mechanism according to the second embodiment of the present invention.
As shown in FIG. 4, in the second embodiment, an oil retaining member 51 that holds the lubricating oil in a releasable manner is disposed in the oil passage 7 formed in the central shaft 6 of the planetary gear 4.
For example, as shown in FIG. 4, a lateral hole 7a constituting an oil passage 7 formed at the center of the central shaft 6 is formed deeper than in the first embodiment, and this deepened hole is used as a storage portion 8 to form a sponge material. An oil-containing member 51 is accommodated.
Since the other configuration of the second embodiment is configured in the same manner as the first embodiment, the same components are denoted by the same reference numerals and the description thereof is omitted.

この実施例２に係る遊星歯車機構におけるころ軸受の潤滑構造は上述したように構成される。
したがって、軸受回転時において、油圧源としてのオイルポンプから供給される潤滑油は遊星歯車４の中心軸６の油路７を通してころ軸受１０内に供給される。
中心軸６の油路７に対するオイルポンプからの潤滑油の供給が停止された状態となったときには、油路７の収納部８に配設した含油部材５１に保持されている潤滑油が遠心力の作用を受けて放出される。これによって、ころ軸受１０内に潤滑油を補給することができる。このため、ころ軸受１０に対する潤滑油の不足による軸受不良（例えば、摩耗や、焼き付き等）を抑制することができる。 The lubricating structure of the roller bearing in the planetary gear mechanism according to the second embodiment is configured as described above.
Therefore, during the rotation of the bearing, the lubricating oil supplied from the oil pump as a hydraulic source is supplied into the roller bearing 10 through the oil passage 7 of the central shaft 6 of the planetary gear 4.
When the supply of lubricating oil from the oil pump to the oil passage 7 of the central shaft 6 is stopped, the lubricating oil held in the oil retaining member 51 disposed in the storage portion 8 of the oil passage 7 is subjected to centrifugal force. Released under the action of Thereby, lubricating oil can be replenished in the roller bearing 10. For this reason, bearing failure (for example, wear, seizure, etc.) due to lack of lubricating oil for the roller bearing 10 can be suppressed.

なお、この発明は前記実施例１及び２に限定するものではなく、この発明の要旨を逸脱しない範囲内において、種々なる形態で実施することもできる。
例えば、前記実施例１及び２においては、含油部材５０、５１を構成する材料、すなわち、潤滑油を放出可能に保持する材料として連続気泡の発泡樹脂材、発泡ゴム材等のスポンジ材を用いて重量増加を抑制したが、スポンジ材の他、多孔質金属材等を用いてもこの発明を実施することができる。
また、前記実施例１では保持器２０に含油部材５０を配設し、前記実施例２では遊星歯車４の中心軸６の油路７に含油部材５１を配設しが、保持器２０と油路７にそれぞれ含油部材５０、５１を配設することによって、潤滑油の補給効果を高めることができる。 In addition, this invention is not limited to the said Example 1 and 2, In the range which does not deviate from the summary of this invention, it can also be implemented with a various form.
For example, in Examples 1 and 2, a sponge material such as an open-cell foamed resin material or a foamed rubber material is used as a material constituting the oil-impregnated members 50 and 51, that is, a material that releasably holds the lubricating oil. Although the increase in weight was suppressed, the present invention can be carried out using a porous metal material or the like in addition to the sponge material.
In the first embodiment, the oil retaining member 50 is disposed in the cage 20, and in the second embodiment, the oil retaining member 51 is disposed in the oil passage 7 of the central shaft 6 of the planetary gear 4. By providing the oil-impregnated members 50 and 51 in the path 7 respectively, the effect of replenishing the lubricating oil can be enhanced.

１ 遊星歯車機構
２ 太陽歯車
３ リングギヤ
４ 遊星歯車
５ 中心孔
６ 中心軸
７ 油路
８ 収納部
１０ ころ軸受
１１ ころ
２０ 保持器
５０、５１ 含油部材
DESCRIPTION OF SYMBOLS 1 Planetary gear mechanism 2 Sun gear 3 Ring gear 4 Planetary gear 5 Center hole 6 Center shaft 7 Oil path 8 Storage part 10 Roller bearing 11 Roller 20 Cage 50, 51 Oil-impregnated member

Claims (3)

遊星歯車機構の遊星歯車の中心孔と中心軸との間に配置されるころ軸受に潤滑油を供給するために、油圧源に通じる油路が前記中心軸に形成された遊星歯車機構におけるころ軸受の潤滑構造であって、
前記ころ軸受の保持器には、前記中心軸の油路を通して供給される潤滑油を放出可能に保持する含油部材が設けられていることを特徴とする遊星歯車機構におけるころ軸受の潤滑構造。 A roller bearing in a planetary gear mechanism in which an oil passage leading to a hydraulic pressure source is formed in the central shaft for supplying lubricating oil to the roller bearing disposed between the central hole and the central shaft of the planetary gear of the planetary gear mechanism. The lubricating structure of
A roller bearing lubrication structure in a planetary gear mechanism, wherein the roller bearing retainer is provided with an oil-impregnating member that releasably retains lubricating oil supplied through the oil passage of the central shaft. 請求項１に記載の遊星歯車機構におけるころ軸受の潤滑構造であって、
含油部材は、保持器の内径面に層状をなして貼り付けられていることを特徴とする遊星歯車機構のころ軸受。 A lubricating structure for a roller bearing in the planetary gear mechanism according to claim 1,
A roller bearing for a planetary gear mechanism, wherein the oil-impregnated member is affixed in a layered manner to the inner surface of the cage. 遊星歯車機構の遊星歯車の中心孔と中心軸との間に配置されるころ軸受に潤滑油を供給するために、油圧源に通じる油路が前記中心軸に形成された遊星歯車機構におけるころ軸受の潤滑構造であって、
前記油路には、潤滑油を放出可能に保持する含油部材が配設されていることを特徴とする遊星歯車機構におけるころ軸受の潤滑構造。 A roller bearing in a planetary gear mechanism in which an oil passage leading to a hydraulic pressure source is formed in the central shaft for supplying lubricating oil to the roller bearing disposed between the central hole and the central shaft of the planetary gear of the planetary gear mechanism. The lubricating structure of
A lubrication structure for a roller bearing in a planetary gear mechanism, wherein an oil-containing member for releasably holding the lubricating oil is disposed in the oil passage.
JP2009010777A 2009-01-21 2009-01-21 Roller bearing lubricating structure for planetary gear mechanism Pending JP2010169142A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594254A (en) * 2017-02-14 2017-04-26 哈尔滨东安发动机（集团）有限公司 Bearing lubricating structure
US20200018352A1 (en) * 2018-07-10 2020-01-16 Jtekt Corporation Rotator support shaft, method for manufacturing rotator support shaft, and roller bearing
JP2020190327A (en) * 2019-05-24 2020-11-26 日本精工株式会社 Bearing device
CN114838058A (en) * 2022-05-25 2022-08-02 江苏欧斯特精密机械有限公司 Motor bearing state monitoring and early warning device and heat dissipation and lubrication device for bearing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106594254A (en) * 2017-02-14 2017-04-26 哈尔滨东安发动机（集团）有限公司 Bearing lubricating structure
US20200018352A1 (en) * 2018-07-10 2020-01-16 Jtekt Corporation Rotator support shaft, method for manufacturing rotator support shaft, and roller bearing
US10962058B2 (en) * 2018-07-10 2021-03-30 Jtekt Corporation Rotator support shaft, method for manufacturing rotator support shaft, and roller bearing
JP2020190327A (en) * 2019-05-24 2020-11-26 日本精工株式会社 Bearing device
CN114838058A (en) * 2022-05-25 2022-08-02 江苏欧斯特精密机械有限公司 Motor bearing state monitoring and early warning device and heat dissipation and lubrication device for bearing

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