JP3596675B2 - Internal combustion engine lubrication system - Google Patents

Internal combustion engine lubrication system Download PDF

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Publication number
JP3596675B2
JP3596675B2 JP2001127055A JP2001127055A JP3596675B2 JP 3596675 B2 JP3596675 B2 JP 3596675B2 JP 2001127055 A JP2001127055 A JP 2001127055A JP 2001127055 A JP2001127055 A JP 2001127055A JP 3596675 B2 JP3596675 B2 JP 3596675B2
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Japan
Prior art keywords
lubricating oil
oil supply
divided
transmission
transmission case
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Expired - Fee Related
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JP2001127055A
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JP2002323118A (en
Inventor
敏治 阿久津
孝史 石坂
雄一 早田
英男 小林
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP2001127055A priority Critical patent/JP3596675B2/en
Priority to CNB021058350A priority patent/CN1205426C/en
Publication of JP2002323118A publication Critical patent/JP2002323118A/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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は内燃機関、特にそのトランスミッションケース内の潤滑装置に関する。
【０００２】
【従来の技術】
従来の内燃機関のトランスミッションケース内の潤滑装置として、例えば実公平５−３３６８６号公報、実公平８−３７４４号公報、特開平１０−２９９８７６号公報、特開平１１−１９０４１８号公報等で開示されたものがある。これらは、ミッション軸内からの強制・飛沫給油か、トランスミッションケース側に設けたオイル溜りからミッションギヤ歯面への給油か、もしくは給油通路からミッションギヤ歯面へのジェットによる給油等であった。
【０００３】
【解決しようとする課題】
前記従来のトランスミッションケース内の潤滑装置は、いずれもミッション系全体の潤滑が不十分だったり、または複雑なオイル通路を加工する必要がある等の問題があった。
【０００４】
前記従来の課題を解決するために、請求項１記載の発明は、ミッション軸と交差する分割面で分割されたトランスミッションケースの上部に、上記分割面を横切って上記ミッション軸の軸方向に延び、上記分割された各トランスミッションケースの側壁まで連なる舌状の庇（ひさし）と、上記庇の基部に開口した潤滑油供給口とを備えたことを特徴とする内燃機関の潤滑装置である。
【０００５】
したがって請求項１記載の発明では、トランスミッションケースの分割面を横切ってミッション軸の軸方向に延びる舌状の庇を設けたので、庇の基部に開口した潤滑油供給口から庇上に供給された潤滑油が、ミッション軸の軸方向に拡がりながら庇の表面上を流下してミッション軸上に落ち、その全長にわたって充分に潤滑する。またこの庇は分割された各トランスミッションケースの側壁まで連なるので、各ミッションケースの補強部材としても機能する。
【０００６】
また請求項２記載の発明は、前記請求項１記載の発明において、上記潤滑油供給口が上記分割面に設けられるとともに、上記潤滑油供給口に至る潤滑油供給通路が、上記分割された各トランスミッションケースの中、いずれか一方のみの上記分割面に設けられる溝によって形成されたことを特徴とするものである。
【０００７】
したがって請求項２記載の発明では、トランスミッションケースの壁内やシャフト内に複雑なオイル通路を加工する必要がなく、またパイプのように組み付けの面倒さもないので、製作費を低減することができる。
【０００８】
【発明の実施の形態】
図１は本発明の一実施形態を示す断面図である。この図に示されるように、本実施形態の内燃機関は、単気筒のシリンダブロック１とシリンダヘッド２とクランクケースを兼ねるトランスミッションケース３とを備えている。上記トランスミッションケース３内には、クランク軸４から図示しないプライマリーギヤを介して回転力を受ける主軸５と、複数組（図示側では４組）のドライブギヤＭ１、Ｍ２、Ｍ３、Ｍ４およびドリブンギヤＣ１、Ｃ２、Ｃ３、Ｃ４を介して上記主軸５の回転力を受ける出力軸６が備えられている。７はキック軸、８はシフトドラム８である。
【０００９】
なお図１中１０はコンロッド、１１はシリンダライナ、１２はピストン、１３は給・排気弁をそれぞれ示す。
【００１０】
本実施形態では、トランスミッションケース３の上部に主軸５、出力軸６等のミッション軸の軸方向にわたって、舌状の庇（ひさし）２１が設けられている。そしてその庇２１の基部には潤滑油供給通路２３の下流端である潤滑油供給口２２が開口している。その潤滑油供給通路２３の上流端には潤滑油送給口２４が設けられていて、図示しないオイルポンプの吐出口に連通している。
【００１１】
本実施形態のトランスミッションケース３は、上記ミッション軸と交差する面（図示例では直交する面）で左右に二分割されている。図２はそのように分割されたトランスミッションケース３の一方（左半部３Ａ）を内側から見た図、図３は同じく他方（右半部３Ｂ）を内側から見た図である。また図４は上記トランスミッションケース３を組立て、図２および図３のＩＶ−ＩＶ鎖線で切断し矢印方向に見た断面図、図５は同じくＶ−Ｖ鎖線で切断し矢印方向に見た断面図である。そして図２および図３中、二重鎖線の施された部分は、左右の分割面（合わせ面）（図４および図５中の３Ｃ）を示す。
【００１２】
これらの図で示されるように、上記潤滑油供給口22はトランスミッションケース３の分割面（合わせ面）３Ｃに開口している。そして庇21は分割面３Ｃをはさんで左半部21Ａ、右半部21Ｂに分割されて、ミッション軸の軸方向（図５では上下方向）に延び、分割された各トランスミッションケース３Ａ、３Ｂの側壁１５Ａ、１５Ｂまで連なっている。また分割されたトランスミッションケース３の一方（図示側では左半部３Ａ）に潤滑油供給溝23Ａが穿設されており、これを溝の設けられていない他方(図示側では右半部３Ｂ)と合わせて組立てることにより、図１に示された潤滑油供給通路23が形成される。
【００１３】
図示しないオイルポンプから送給されて来た潤滑油は、潤滑油送給口２４、潤滑油供給通路２３を経て潤滑油供給口２２から庇２１の上面に供給される。そして庇２１の表面上を主軸５、出力軸６の軸方向に拡がりつつ流下し、下縁からドライブギヤやドリブンギヤ等の上に滴下されて、それらを潤滑する。
【００１４】
本実施形態では、トランスミッションケース３の上部にミッション軸の軸方向にわたり、舌状の庇２１が設けられ、その庇２１の基部に潤滑油供給口２２が開口しているので、庇２１上に供給された潤滑油はミッション軸方向に拡がり、ミッション軸はその全長にわたって潤滑される。
【００１５】
本実施形態ではまた、トランスミッションケース３がミッション軸と交差する面で分割され、その分割面（合わせ面）３Ｃに潤滑油供給口22、潤滑油供給通路23、潤滑油送給口24が設けられるので、分割された一方のトランスミッションケース３に潤滑油供給溝23Ａ等を穿設するだけで、潤滑油供給通路23を形成することができ、トランスミッションケース３の壁内やシャフト内に複雑なオイル通路を加工する必要がなく、またパイプ等を組み付ける面倒さもない。また、こうして簡単な構成でミッション系全体が充分に潤滑されるので、ミッションギヤやシフトフォーク等に焼付防止のための特別な表面処理を施す必要もない。したがって製作費を低減することができる。
【図面の簡単な説明】
【図１】図１は本発明の一実施形態を示す断面図である。
【図２】図２は上記実施形態のトランスミッションケースの分割された一方（左半部）を内側から見た図である。
【図３】図３は同じく他方（右半部）を内側から見た図である。
【図４】図４は上記トランスミッションケースを組立て、図２および図３のＩＶ−ＩＶ鎖線で切断し矢印方向に見た断面図である。
【図５】図５は同じくＶ−Ｖ鎖線で切断し矢印方向に見た断面図である。
【符号の説明】
１…シリンダブロック、２…シリンダヘッド、３…トランスミッションケース、３Ｃ…分割面（合わせ面）、４…クランク軸、５…主軸、６…出力軸、７…キック軸、８…シフトドラム、１０…コンロッド、１１…シリンダライナ、１２…ピストン、１３…給・排気弁、２１…庇（ひさし）、２２…潤滑油供給口、２３…潤滑油供給通路、２３Ａ…潤滑油供給溝、２４…潤滑油送給口、Ｍ１、Ｍ２、Ｍ３、Ｍ４…ドライブギヤ、Ｃ１、Ｃ２、Ｃ３、Ｃ４…ドリブンギヤ。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an internal combustion engine, and more particularly to a lubrication device in a transmission case thereof.
[0002]
[Prior art]
Conventional lubricating devices in a transmission case of an internal combustion engine are disclosed in, for example, Japanese Utility Model Publication No. 5-33686, Japanese Utility Model Publication No. 8-3744, Japanese Patent Application Laid-Open No. 10-299876, and Japanese Patent Application Laid-Open No. 11-190418. There is something. These were forced / splash lubrication from inside the transmission shaft, lubrication to the transmission gear tooth surface from an oil reservoir provided on the transmission case side, or jet lubrication from the oil supply passage to the transmission gear tooth surface.
[0003]
[Problem to be solved]
All of the conventional lubrication devices in the transmission case have problems such as insufficient lubrication of the entire transmission system or the need to machine complicated oil passages.
[0004]
In order to solve the conventional problem, the invention according to claim 1 is provided on an upper part of a transmission case divided by a division plane intersecting with a transmission axis, extending in an axial direction of the transmission axis across the division plane, the up divided side walls of the transmission case was contiguous tongues canopy and (eaves), a lubrication system for an internal combustion engine, characterized in that a lubricating oil supply port which opens at the base of the eaves.
[0005]
Therefore, in the invention according to claim 1 , since the tongue-shaped eaves extending in the axial direction of the transmission shaft across the divided surface of the transmission case is provided, the lubricating oil supply port opened at the base of the eaves is supplied onto the eaves. The lubricating oil flows down on the surface of the eaves while spreading in the axial direction of the transmission shaft, falls on the transmission shaft, and lubricates the entire length thereof. In addition, since the eaves continue to the side wall of each divided transmission case, it also functions as a reinforcing member for each transmission case.
[0006]
According to a second aspect of the present invention, in the first aspect of the present invention, the lubricating oil supply port is provided on the dividing surface, and the lubricating oil supply passage leading to the lubricating oil supply port is formed by each of the divided oil supply passages. The transmission case is formed by a groove provided on only one of the divided surfaces in the transmission case .
[0007]
Therefore, according to the second aspect of the present invention, it is not necessary to machine a complicated oil passage in the wall of the transmission case or in the shaft, and there is no troublesome assembling like a pipe, so that the manufacturing cost can be reduced.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a sectional view showing an embodiment of the present invention. As shown in this figure, the internal combustion engine of the present embodiment includes a single-cylinder cylinder block 1, a cylinder head 2, and a transmission case 3 also serving as a crankcase. In the transmission case 3, a main shaft 5 that receives a rotational force from a crankshaft 4 via a primary gear (not shown), a plurality of (four in the illustrated side) drive gears M1, M2, M3, M4, and a driven gear C1, An output shaft 6 that receives the rotational force of the main shaft 5 via C2, C3, and C4 is provided. 7, a kick shaft; and 8, a shift drum 8.
[0009]
In FIG. 1, reference numeral 10 denotes a connecting rod, 11 denotes a cylinder liner, 12 denotes a piston, and 13 denotes a supply / exhaust valve.
[0010]
In the present embodiment, a tongue-shaped eave (eave) 21 is provided in the upper part of the transmission case 3 along the axial direction of the transmission shaft such as the main shaft 5 and the output shaft 6. A lubricating oil supply port 22 which is a downstream end of the lubricating oil supply passage 23 is opened at the base of the eave 21. A lubricating oil supply port 24 is provided at an upstream end of the lubricating oil supply passage 23 and communicates with a discharge port of an oil pump (not shown).
[0011]
The transmission case 3 of the present embodiment is divided into left and right by a plane intersecting the transmission axis (a plane orthogonal to the illustrated example). FIG. 2 is a view of one of the divided transmission cases 3 (the left half 3A) as viewed from the inside, and FIG. 3 is a view of the same (the right half 3B) as viewed from the inside. 4 is a cross-sectional view of the transmission case 3 assembled and cut along a chain line IV-IV in FIGS. 2 and 3 and viewed in the direction of the arrow. FIG. 5 is a cross-sectional view similarly cut along a line VV and viewed in the direction of the arrow. It is. In FIGS. 2 and 3, the portions with double-dashed lines indicate left and right dividing surfaces (matching surfaces) (3C in FIGS. 4 and 5).
[0012]
As shown in these figures, the lubricating oil supply port 22 is open on the dividing surface (matching surface) 3C of the transmission case 3. The eaves 21 are divided into a left half portion 21A and a right half portion 21B with the division surface 3C interposed therebetween, and extend in the axial direction of the transmission shaft (vertical direction in FIG. 5). It continues to the side walls 15A and 15B . A lubricating oil supply groove 23A is formed in one of the divided transmission cases 3 (the left half 3A on the illustrated side), and the lubricating oil supply groove 23A is separated from the other (the right half 3B on the illustrated side). By assembling together, the lubricating oil supply passage 23 shown in FIG. 1 is formed.
[0013]
The lubricating oil supplied from an oil pump (not shown) is supplied to the upper surface of the eaves 21 from the lubricating oil supply port 22 through the lubricating oil supply port 24 and the lubricating oil supply passage 23. Then, it flows down while spreading on the surface of the eaves 21 in the axial direction of the main shaft 5 and the output shaft 6, and is dripped from the lower edge onto a drive gear, a driven gear, or the like to lubricate them.
[0014]
In the present embodiment, a tongue-shaped eave 21 is provided in the upper part of the transmission case 3 in the axial direction of the transmission shaft, and the lubricating oil supply port 22 is opened at the base of the eave 21. The lubricating oil spreads in the direction of the transmission axis, and the transmission axis is lubricated over its entire length.
[0015]
In the present embodiment, the transmission case 3 is also divided at a plane intersecting the transmission axis, and a lubricating oil supply port 22, a lubricating oil supply passage 23, and a lubricating oil supply port 24 are provided on the divided surface (matching surface) 3C. Therefore, the lubricating oil supply passage 23 can be formed only by drilling the lubricating oil supply groove 23A or the like in one of the divided transmission cases 3, and the complicated oil passage is formed in the wall of the transmission case 3 or in the shaft. No processing is required, and there is no trouble in assembling pipes. In addition, since the entire transmission system is sufficiently lubricated with this simple configuration, it is not necessary to apply a special surface treatment to prevent seizure of the transmission gear, the shift fork, and the like. Therefore, manufacturing costs can be reduced.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of the present invention.
FIG. 2 is a view of one side (left half) of the transmission case of the embodiment as viewed from the inside.
FIG. 3 is a view of the other (right half) as viewed from the inside.
FIG. 4 is a sectional view of the transmission case assembled, cut along a chain line IV-IV in FIGS. 2 and 3, and viewed in a direction indicated by an arrow.
FIG. 5 is a sectional view taken along the line VV and viewed in the direction of the arrow.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Cylinder block, 2 ... Cylinder head, 3 ... Transmission case, 3C ... Division surface (matching surface), 4 ... Crank shaft, 5 ... Main shaft, 6 ... Output shaft, 7 ... Kick shaft, 8 ... Shift drum, 10 ... Connecting rod, 11: cylinder liner, 12: piston, 13: supply / exhaust valve, 21: eave (eave), 22: lubricating oil supply port, 23: lubricating oil supply passage, 23A: lubricating oil supply groove, 24: lubricating oil Feed ports, M1, M2, M3, M4 ... drive gears, C1, C2, C3, C4 ... driven gears.

Claims (2)

ミッション軸と交差する分割面で分割されたトランスミッションケースの上部に、上記分割面を横切って上記ミッション軸の軸方向に延び、上記分割された各トランスミッションケースの側壁まで連なる舌状の庇（ひさし）と、上記庇の基部に開口した潤滑油供給口とを備えたことを特徴とする内燃機関の潤滑装置。 A tongue-shaped eave extending above the transmission case divided by a division plane intersecting the transmission shaft, extends in the axial direction of the transmission shaft across the division plane, and continues to the side wall of each divided transmission case. When lubricating system for an internal combustion engine, characterized in that a opened at the base of the eaves lubricating oil supply port. 上記潤滑油供給口が上記分割面に設けられるとともに、上記潤滑油供給口に至る潤滑油供給通路が、上記分割された各トランスミッションケースの中、いずれか一方のみの上記分割面に設けられる溝によって形成されたことを特徴とする請求項１記載の内燃機関の潤滑装置。 The lubricating oil supply port is provided on the divided surface, and the lubricating oil supply passage leading to the lubricating oil supply port is formed by a groove provided on only one of the divided surfaces in each of the divided transmission cases. lubrication system for an internal combustion engine according to claim 1, characterized in that it is formed.
JP2001127055A 2001-04-25 2001-04-25 Internal combustion engine lubrication system Expired - Fee Related JP3596675B2 (en)

Priority Applications (2)

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JP2001127055A JP3596675B2 (en) 2001-04-25 2001-04-25 Internal combustion engine lubrication system
CNB021058350A CN1205426C (en) 2001-04-25 2002-04-11 Lubricating device of I.C. engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001127055A JP3596675B2 (en) 2001-04-25 2001-04-25 Internal combustion engine lubrication system

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JP2002323118A JP2002323118A (en) 2002-11-08
JP3596675B2 true JP3596675B2 (en) 2004-12-02

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Publication number Priority date Publication date Assignee Title
JP4810288B2 (en) * 2006-04-14 2011-11-09 本田技研工業株式会社 Lubricating device for vehicle transmission
JP5698100B2 (en) * 2011-09-27 2015-04-08 本田技研工業株式会社 Vehicle power unit

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