JP2012013168A - Lubricant supply structure - Google Patents

Lubricant supply structure Download PDF

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JP2012013168A
JP2012013168A JP2010151156A JP2010151156A JP2012013168A JP 2012013168 A JP2012013168 A JP 2012013168A JP 2010151156 A JP2010151156 A JP 2010151156A JP 2010151156 A JP2010151156 A JP 2010151156A JP 2012013168 A JP2012013168 A JP 2012013168A
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cam
lubricating oil
camshaft
oil supply
rolling bearing
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JP5471901B2 (en
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Masami Kawasaki
昌美 川崎
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To more favorably supply a lubricant to a roller bearing supporting a camshaft.SOLUTION: A lubricant supply structure supplies a lubricant to the roller bearing 3 for supporting the camshaft 1 of an internal combustion engine, includes: a lubricant path 4 and a lubricant supply hole 5. The lubricant path 4 is formed to axially extend in the camshaft 1. The lubricant supply hole 5 is formed in the camshaft 1a where a cam 2 is provided, and the cam 2. One end of the lubricant supply hole 5 is connected with the lubricant path 4, and the other end is a side surface of the cam 2 and is opened on a surface facing the roller bearing 3.

Description

本発明は、内燃機関のカムシャフトを支持する転がり軸受けに潤滑油を供給する潤滑油供給構造に関する。   The present invention relates to a lubricating oil supply structure that supplies lubricating oil to a rolling bearing that supports a camshaft of an internal combustion engine.

特許文献１には、カムシャフトの内部に、軸方向に延びるオイル通路と、該オイル通路から針状ころ軸受によって支持される軸部に向かって延びる油孔と、を形成する技術が記載されている。   Patent Document 1 describes a technique for forming an oil passage extending in the axial direction inside the camshaft and an oil hole extending from the oil passage toward a shaft portion supported by a needle roller bearing. Yes.

特許文献２には、内部給油式中空カムシャフトの軸部及びカム部に配油孔を軸方向に形成し、そのカム部に配油孔に対してほぼ直角に給油孔を形成する技術が記載されている。この特許文献２に記載の技術においては、給油孔を通してカムのカム面に潤滑油を供給する。   Patent Document 2 describes a technique in which an oil distribution hole is formed in an axial direction in the shaft portion and the cam portion of an internal oil-filled hollow camshaft, and the oil supply hole is formed in the cam portion substantially at right angles to the oil distribution hole. Has been. In the technique described in Patent Document 2, lubricating oil is supplied to the cam surface of the cam through the oil supply hole.

特開２００８−５７５０６号公報JP 2008-57506 A 特開平０９−２５０６２６号公報JP 09-250626 A 実登３００８３３８号公報Noto 3008338 実開平０６−０８２４５５号公報Japanese Utility Model Publication No. 06-084555

内燃機関のカムシャフトは転がり軸受によって回転可能に支持されている。本発明は、カムシャフトを支持する転がり軸受に潤滑油をより好適に供給することが可能な技術を提供することを目的とする。   The camshaft of the internal combustion engine is rotatably supported by a rolling bearing. An object of this invention is to provide the technique which can supply lubricating oil more suitably to the rolling bearing which supports a camshaft.

本発明は、内燃機関のカムシャフトを支持する転がり軸受に潤滑油を供給する潤滑油供給構造であって、
前記カムシャフトの内部において軸方向に延びるように形成された潤滑油通路と、
前記カムシャフトにおけるカムが設けられた部分と該カムとに形成されており、一端が前記潤滑油通路に接続され、他端が前記カムの側面であって前記転がり軸受と対向する面に開口している潤滑油供給孔と、
を備えている。 The present invention is a lubricating oil supply structure for supplying lubricating oil to a rolling bearing that supports a camshaft of an internal combustion engine,
A lubricating oil passage formed so as to extend in the axial direction inside the camshaft;
The camshaft is formed on the camshaft and the cam, and one end is connected to the lubricating oil passage, and the other end is open on the side of the cam that faces the rolling bearing. A lubricating oil supply hole,
It has.

本発明によれば、潤滑油通路と潤滑油供給孔とを通して転がり軸受に潤滑油を供給することができる。そのため、転がり軸受に潤滑油を供給するための給油通路をカムシャフトとは別途に設けることが不要となる。   According to the present invention, the lubricating oil can be supplied to the rolling bearing through the lubricating oil passage and the lubricating oil supply hole. Therefore, it becomes unnecessary to provide an oil supply passage for supplying lubricating oil to the rolling bearing separately from the camshaft.

前記カムにおいては、潤滑油供給孔が、該カムのリフト部が形成される位置に形成されてもよい。これによれば、カムにおける肉厚の厚い部分に潤滑油供給孔が形成されることになる。従って、カムの剛性を確保し易くなる。   In the cam, the lubricating oil supply hole may be formed at a position where the lift portion of the cam is formed. According to this, the lubricating oil supply hole is formed in the thick part of the cam. Therefore, it becomes easy to ensure the rigidity of the cam.

前記カムは、複数のカム分割体が固定部材によってカムシャフトに固定されることで形成されてもよい。カムシャフトへのカムの取り付け性を向上させることができる。また、カムシャフトへの転がり軸受の取り付け性も向上させることができる。   The cam may be formed by fixing a plurality of cam divided bodies to a camshaft by a fixing member. The cam attachability to the camshaft can be improved. Moreover, the attachment property of the rolling bearing to a camshaft can also be improved.

本発明によれば、カムシャフトを支持する転がり軸受に潤滑油をより好適に供給することができる。   According to the present invention, the lubricating oil can be more suitably supplied to the rolling bearing that supports the camshaft.

実施形態に係るカムシャフトの一部、カム、及び転がり軸受の概略構成を示す外観図である。It is an external view which shows schematic structure of a part of camshaft which concerns on embodiment, a cam, and a rolling bearing. 実施形態に係るカムシャフトの一部、カム、及び転がり軸受の概略構成を示す断面図である。It is sectional drawing which shows schematic structure of a part of camshaft which concerns on embodiment, a cam, and a rolling bearing. 本実施形態に係るカムの構成の一例を示す図である。It is a figure which shows an example of a structure of the cam which concerns on this embodiment.

以下、本発明の具体的な実施形態について図面に基づいて説明する。本実施例に記載されている構成部品の寸法、材質、形状、その相対配置等は、特に記載がない限りは発明の技術的範囲をそれらのみに限定する趣旨のものではない。   Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the present embodiment are not intended to limit the technical scope of the invention to those unless otherwise specified.

図１及び２は、本実施形態に係るカムシャフトの一部、カム、及び転がり軸受の概略構成を示す図である。図１は外観図である。図２（ａ）はカムシャフトの軸方向に切断した場合の断面の一部を示す断面図であり、図２（ｂ）は図２（ａ）においてＡ−Ａで示す断面の断面図であり、図２（ｃ）は図２（ａ）においてＢ−Ｂで示す断面の断面図である。   1 and 2 are diagrams showing a schematic configuration of a part of a camshaft, a cam, and a rolling bearing according to the present embodiment. FIG. 1 is an external view. 2A is a cross-sectional view showing a part of a cross section when cut in the axial direction of the camshaft, and FIG. 2B is a cross-sectional view of the cross section indicated by AA in FIG. 2A. 2C is a cross-sectional view taken along the line BB in FIG. 2A.

図１に示すように、カムシャフト１には、内燃機関の吸気弁又は排気弁を開閉駆動させるためのカム２が設けられている。図１は、内燃機関の一つの気筒に二つの吸気弁又は排気弁が設けられている場合において、各吸気弁又は排気弁に対応する二つのカム２が設けられた場合を示している。   As shown in FIG. 1, the camshaft 1 is provided with a cam 2 for opening and closing an intake valve or an exhaust valve of the internal combustion engine. FIG. 1 shows a case where two cams 2 corresponding to each intake valve or exhaust valve are provided when two intake valves or exhaust valves are provided in one cylinder of the internal combustion engine.

カムシャフト１は、転がり軸受３によって内燃機関に回転可能に支持されている。本実施形態においては、図１に示すように、二つの転がり軸受３によって二つのカム２を挟むように、転がり軸受３が配置されている。   The camshaft 1 is rotatably supported by the internal combustion engine by a rolling bearing 3. In the present embodiment, as shown in FIG. 1, the rolling bearing 3 is arranged so that the two cams 2 are sandwiched between the two rolling bearings 3.

図２に示すように、カムシャフト１の内部には、その軸方向に延びるように潤滑油通路４が形成されている。つまり、本実施形態に係るカムシャフト１は中空管構造となっている。潤滑油通路４には、内燃機関に形成された潤滑油循環経路から潤滑油が流入する。そして、潤滑油通路４を通って流れた潤滑油が該潤滑油循環経路に排出される。   As shown in FIG. 2, a lubricating oil passage 4 is formed in the camshaft 1 so as to extend in the axial direction thereof. That is, the camshaft 1 according to the present embodiment has a hollow tube structure. Lubricating oil flows into the lubricating oil passage 4 from a lubricating oil circulation path formed in the internal combustion engine. Then, the lubricating oil that has flowed through the lubricating oil passage 4 is discharged to the lubricating oil circulation path.

さらに、カムシャフト１におけるカム２が形成されている部分及びカム２には潤滑油供給孔５が形成されている。潤滑油供給孔５の一端は潤滑油通路４に接続されている。潤滑油供給孔５は、該一端からカム２に向かって延びている。カム２においては、潤滑油供給孔５が、リフト部（カム２のベースサークルから突出する部分）が形成される位置に形成されている。そして、潤滑油供給孔５の他端が、カム２の側面であって転がり軸受と対向する面に開口している。   Furthermore, a lubricating oil supply hole 5 is formed in the cam shaft 1 where the cam 2 is formed and the cam 2. One end of the lubricating oil supply hole 5 is connected to the lubricating oil passage 4. The lubricating oil supply hole 5 extends from the one end toward the cam 2. In the cam 2, the lubricating oil supply hole 5 is formed at a position where a lift portion (a portion protruding from the base circle of the cam 2) is formed. The other end of the lubricating oil supply hole 5 is open on the side surface of the cam 2 that faces the rolling bearing.

潤滑油供給孔５においては、潤滑油通路４を流れる潤滑油がその一端から流入し、該潤滑油がその他端から流出する。そして、他端から流出した潤滑油が転がり軸受３に供給される。   In the lubricating oil supply hole 5, the lubricating oil flowing through the lubricating oil passage 4 flows in from one end, and the lubricating oil flows out from the other end. Then, the lubricating oil flowing out from the other end is supplied to the rolling bearing 3.

本実施形態に係る構造よれば、潤滑油通路４と潤滑油供給孔５とを通して転がり軸受３に潤滑油を供給することができる。そのため、転がり軸受３に潤滑油を供給するための給油通路をカムシャフト１とは別途に設けることが不要となる。従って、内燃機関の部品点
数の低減およびコストの低減を図ることができる。 According to the structure according to this embodiment, the lubricating oil can be supplied to the rolling bearing 3 through the lubricating oil passage 4 and the lubricating oil supply hole 5. Therefore, it is not necessary to provide an oil supply passage for supplying lubricating oil to the rolling bearing 3 separately from the camshaft 1. Therefore, it is possible to reduce the number of parts and the cost of the internal combustion engine.

また、カム２において潤滑油供給孔５が形成される部分は、該カム２における他の部分よりも肉厚が厚い部分である。そのため、潤滑油供給孔５を形成しても、その剛性を確保することができる。   Further, the portion of the cam 2 where the lubricating oil supply hole 5 is formed is a portion that is thicker than the other portions of the cam 2. Therefore, even if the lubricating oil supply hole 5 is formed, its rigidity can be ensured.

［その他の構成］
図３は本実施形態に係るカムの構成の一例を示す図である。図３（ａ）は図２（ａ）においてＢ−Ｂで示す断面の断面図である。図３（ｂ）は、カム２を構成するカム分割体２ａ，２ｂを示す図である。 [Other configurations]
FIG. 3 is a diagram showing an example of the configuration of the cam according to the present embodiment. Fig.3 (a) is sectional drawing of the cross section shown by BB in Fig.2 (a). FIG. 3B is a diagram showing cam split bodies 2 a and 2 b constituting the cam 2.

図３に示すように、本実施形態に係るカム２は二つのカム分割体２ａ，２ｂによって構成されてもよい。この場合、二つのカム分割体２ａ，２ｂをカムシャフト１にボルト６によって固定することでカム２を形成することができる。   As shown in FIG. 3, the cam 2 according to the present embodiment may be constituted by two cam divided bodies 2a and 2b. In this case, the cam 2 can be formed by fixing the two cam divided bodies 2 a and 2 b to the cam shaft 1 with the bolt 6.

カム２を上記のような構成とすることで、カムシャフト１へのカム２の取り付け性を向上させることができる。また、カムシャフト１に転がり軸受３を取り付けた後にカム２を取り付けることが可能であるあるため、カムシャフト１への転がり軸受３の取り付け性も向上させることができる。さらに、カム２を取り外しが可能となるため、転がり軸受３に破損が破損した場合、カムシャフト１からカム２を一旦取り外して、破損した転がり軸受３のみを交換することできる。   When the cam 2 is configured as described above, the attachment of the cam 2 to the camshaft 1 can be improved. Moreover, since it is possible to attach the cam 2 after attaching the rolling bearing 3 to the camshaft 1, the attachment property of the rolling bearing 3 to the camshaft 1 can also be improved. Further, since the cam 2 can be detached, when the rolling bearing 3 is damaged, the cam 2 can be temporarily detached from the camshaft 1 and only the damaged rolling bearing 3 can be replaced.

１・・・カムシャフト
２・・・カム
３・・・転がり軸受
４・・・潤滑油通路
５・・・潤滑油供給孔 DESCRIPTION OF SYMBOLS 1 ... Cam shaft 2 ... Cam 3 ... Rolling bearing 4 ... Lubricant passage 5 ... Lubricant supply hole

Claims (3)

内燃機関のカムシャフトを支持する転がり軸受に潤滑油を供給する潤滑油供給構造であって、
前記カムシャフトの内部において軸方向に延びるように形成された潤滑油通路と、
前記カムシャフトにおけるカムが設けられた部分と該カムとに形成されており、一端が前記潤滑油通路に接続され、他端が前記カムの側面であって前記転がり軸受と対向する面に開口している潤滑油供給孔と、
を備えた潤滑油供給構造。 A lubricating oil supply structure for supplying lubricating oil to a rolling bearing that supports a camshaft of an internal combustion engine,
A lubricating oil passage formed so as to extend in the axial direction inside the camshaft;
The camshaft is formed on the camshaft and the cam, and one end is connected to the lubricating oil passage, and the other end is open on the side of the cam that faces the rolling bearing. A lubricating oil supply hole,
Lubricating oil supply structure with 前記カムにおいて、前記潤滑油供給孔が、該カムのリフト部が形成される位置に形成されている請求項１に記載された潤滑油供給構造。   The lubricating oil supply structure according to claim 1, wherein the lubricating oil supply hole is formed at a position where a lift portion of the cam is formed in the cam. 前記カムが、複数のカム分割体が固定部材によって前記カムシャフトに固定されることで形成されている請求項１または２に記載された潤滑油供給構造。   The lubricating oil supply structure according to claim 1 or 2, wherein the cam is formed by fixing a plurality of cam divided bodies to the camshaft by a fixing member.
JP2010151156A 2010-07-01 2010-07-01 Lubricating oil supply structure Expired - Fee Related JP5471901B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2016176200A (en) * 2015-03-19 2016-10-06 三和シヤッター工業株式会社 Shutter device
CN107013655A (en) * 2017-04-13 2017-08-04 安徽奥泰粉末冶金有限公司 A kind of agricultural machinery driving cam

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016221449A1 (en) * 2016-11-02 2018-05-03 Volkswagen Aktiengesellschaft Method for reworking a built functional wave

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JPH09250626A (en) * 1996-03-14 1997-09-22 Riken Corp Internal oil feeding type hollow cam shaft
JP2009024644A (en) * 2007-07-20 2009-02-05 Toyota Motor Corp Oil feeder applied to valve gear in internal combustion engine
JP2010007468A (en) * 2008-06-24 2010-01-14 Mazda Motor Corp Oil feeder for rolling bearing
JP2010116822A (en) * 2008-11-12 2010-05-27 Toyota Motor Corp Lubricating device for valve train

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Publication number Priority date Publication date Assignee Title
JPS5429250U (en) * 1977-07-29 1979-02-26
JPS61598U (en) * 1984-06-08 1986-01-06 富士電機株式会社 Bearing device with oil mist lubrication
JPH09250626A (en) * 1996-03-14 1997-09-22 Riken Corp Internal oil feeding type hollow cam shaft
JP2009024644A (en) * 2007-07-20 2009-02-05 Toyota Motor Corp Oil feeder applied to valve gear in internal combustion engine
JP2010007468A (en) * 2008-06-24 2010-01-14 Mazda Motor Corp Oil feeder for rolling bearing
JP2010116822A (en) * 2008-11-12 2010-05-27 Toyota Motor Corp Lubricating device for valve train

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016176200A (en) * 2015-03-19 2016-10-06 三和シヤッター工業株式会社 Shutter device
CN107013655A (en) * 2017-04-13 2017-08-04 安徽奥泰粉末冶金有限公司 A kind of agricultural machinery driving cam

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