JPS6049120A - Bearing structure of internal-combustion engine for vessel propelling machine - Google Patents
Bearing structure of internal-combustion engine for vessel propelling machineInfo
- Publication number
- JPS6049120A JPS6049120A JP15417583A JP15417583A JPS6049120A JP S6049120 A JPS6049120 A JP S6049120A JP 15417583 A JP15417583 A JP 15417583A JP 15417583 A JP15417583 A JP 15417583A JP S6049120 A JPS6049120 A JP S6049120A
- Authority
- JP
- Japan
- Prior art keywords
- oil
- passage
- oil groove
- lubricating
- bearing part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 239000003921 oil Substances 0.000 claims abstract description 67
- 239000010687 lubricating oil Substances 0.000 claims abstract description 34
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 abstract 3
- 238000005299 abrasion Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
Classifications
-
- 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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/02—Crankshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
- F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding-Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は、船舶推進機用内燃機関の軸受構造に関する。[Detailed description of the invention] The present invention relates to a bearing structure for an internal combustion engine for a marine vessel propulsion device.
船外機等の内燃機関には、カム軸、クランク軸等の回転
軸を機関本体そのものに形成してなる軸受部に支持する
とともに、上記軸受部への潤滑油の円滑な供給を可能と
ずべ（、回転軸の夕１局面の一部に環状の油溝を形成し
、機関本体に設けた潤滑油送油路を上記油溝に向けて開
口してなる軸受構造が用いられている。In internal combustion engines such as outboard motors, a rotating shaft such as a camshaft or a crankshaft is supported by a bearing formed in the engine body itself, and a system that enables smooth supply of lubricating oil to the bearing is required. (A bearing structure is used in which an annular oil groove is formed in a part of the front side of the rotating shaft, and a lubricating oil passage provided in the engine body is opened toward the oil groove.
しかしながら、上記従来の軸受構造にあっては、油溝に
送り込まれた潤滑油中に混入しているごみ、摩耗粉等が
油溝に集積し、ひいては、回転軸との連れ回りによって
生ずる遠心力、および潤滑油の圧送力の作用下で、回転
軸と軸受部の支持面との摺接領域に侵入し１回転軸およ
び軸受部にかじり等の損傷を生ずるおそれがある。However, in the above-mentioned conventional bearing structure, dirt, abrasion particles, etc. mixed in the lubricating oil sent into the oil groove accumulate in the oil groove, and as a result, centrifugal force generated by rotation with the rotating shaft occurs. , and under the action of the pumping force of the lubricating oil, the lubricating oil may enter the sliding contact area between the rotating shaft and the support surface of the bearing, causing damage such as galling to the rotating shaft and the bearing.
本発明は、油溝に溜るごみ、摩耗粉等による軸受部およ
び回転軸の損傷発生を防止することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to prevent damage to a bearing portion and a rotating shaft caused by dirt, abrasion powder, etc. that accumulate in an oil groove.
上記目的を達成するために、本発明は１機関本体そのも
のに回転軸を支持可能とする軸受部を形成゛してなる船
舶推進機用内燃機関の軸受構造において、上記軸受部の
内周面の一部に環状の油溝を形成し１機関本体に設けた
潤滑油送油路を上記油溝に開口づ−るようにしたもので
ある。In order to achieve the above object, the present invention provides a bearing structure for an internal combustion engine for a marine propulsion machine in which a bearing part capable of supporting a rotating shaft is formed in the engine body itself, and in which the inner circumferential surface of the bearing part is An annular oil groove is formed in a part of the engine, and a lubricating oil passage provided in the engine body opens into the oil groove.
以下１本発明の実施例を図面を参照して説明する。An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例が適用されてなる船外機を示
す側面図、第２図は同船外機の内燃機関を示す断面図、
第３図は第２図の要部を取出して示す断面図、第４図は
第３図の要部を拡大して示す断面図である。FIG. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, and FIG. 2 is a sectional view showing an internal combustion engine of the outboard motor.
3 is a cross-sectional view showing the main part of FIG. 2, and FIG. 4 is a cross-sectional view showing the main part of FIG. 3 in an enlarged manner.
船体の船尾板１１にはタランプブラケット１２、スイベ
ルブラケット１３を介してケーシング１４が支持されて
いる。ケーシング１４の上部には。A casing 14 is supported on a stern plate 11 of the hull via a ramp bracket 12 and a swivel bracket 13. At the top of the casing 14.
板状の中間部材１５を介して、内燃機関１６が搭載され
ている。内燃機関１６の出力は−ケーシング１４内に垂
設されている駆動軸１７、前後進切換機構１８を介して
ゾロペラ１９に伝達され、プロペラ１９を前進回転もし
くは後進回転可能としている。An internal combustion engine 16 is mounted via a plate-shaped intermediate member 15. The output of the internal combustion engine 16 is transmitted to the propeller 19 via a drive shaft 17 vertically disposed within the casing 14 and a forward/reverse switching mechanism 18, allowing the propeller 19 to rotate forward or backward.
内燃機関１６は、第２図および第３図に示すように、水
冷式４サイクル２気筒内燃機関とされ、シリンダケース
２０、クランクケース２１、シリンダヘッド２２および
ヘッドカバー２３によってその本体を形成している。シ
リンダケース２０には、上下一対の気筒がそれずれ横置
きされ、各気筒にはそれぞれピストン２４が水平方向に
往復動可能に配置されている。As shown in FIGS. 2 and 3, the internal combustion engine 16 is a water-cooled four-stroke two-cylinder internal combustion engine, and its main body is formed by a cylinder case 20, a crankcase 21, a cylinder head 22, and a head cover 23. . A pair of upper and lower cylinders are arranged horizontally in the cylinder case 20, and a piston 24 is disposed in each cylinder so as to be able to reciprocate in the horizontal direction.
上記シリンダケース２０およびシリンダヘッド２２がピ
ストン２４０頂面側に画成する空間は燃焼室２５とされ
ている。シリンダヘッド２２の燃焼室２５を臨む部分に
は、点火栓、吸気弁によって開弁される吸気ポート、排
気弁によって開弁される排気ボートが配設されている。A space defined by the cylinder case 20 and the cylinder head 22 on the top surface side of the piston 240 is a combustion chamber 25 . A spark plug, an intake port opened by an intake valve, and an exhaust boat opened by an exhaust valve are arranged in a portion of the cylinder head 22 facing the combustion chamber 25.
また、上記シリンダケース２０およびクランクケース２
１がピストン２４の背面側に画成する空間はクランク室
２８とされている。クランク室２８には、シリンダケー
ス２０とクランクケース２１の合面部に形成されている
軸受部に支持されるクランク軸２９が縦置きされ、クラ
ンク軸２９の下端部には前記駆動軸１７の上端部が連結
されている。クランク軸２９はそのウェブ３０間にクラ
ンクピン３１を備え、クランクピン３１に連接棒３２の
大端部３３を連結せしめられている。連接棒３２の小端
部は、ピストンピンによってピストン２４に連結されて
いる。すなわち、クランク軸２９は、燃焼室２５内の爆
発力に基づくピストン２４の往復動に従って回転し、駆
動軸１７に回転力を付与可能とじている。In addition, the cylinder case 20 and the crank case 2
A space defined by 1 on the back side of the piston 24 is defined as a crank chamber 28. A crankshaft 29 supported by a bearing formed at the mating surface of the cylinder case 20 and the crankcase 21 is vertically disposed in the crank chamber 28, and the lower end of the crankshaft 29 is connected to the upper end of the drive shaft 17. are connected. The crankshaft 29 has a crank pin 31 between its webs 30, to which a large end 33 of a connecting rod 32 is connected. The small end of the connecting rod 32 is connected to the piston 24 by a piston pin. That is, the crankshaft 29 rotates according to the reciprocating motion of the piston 24 based on the explosive force within the combustion chamber 25, and is capable of applying rotational force to the drive shaft 17.
前記シリンダヘラ）２２とへッドカパー２３が画成する
空間はカム室３５とされている。カム室３５には、カム
軸３６が縦置きされ、カム軸３６は、その上端側を後述
するようにシリンダヘッド２２そのものに形成される軸
受部６３に直接支持され、その下端側を後述する潤滑油
ポンプ３７のハウジング３８７弁して、シリンダヘッド
２２に間接支持されている。カム軸３６には、吸気カム
３９および排気カム４０が形成されている。吸気カム３
９および排気カム４０は、それぞれ各ロッカー軸に支持
されている各ロッカーアーム４２を介して、前記吸気弁
および排気弁を開弁可能としている。なお、カム軸３６
のカム室３５から突出する上端部には従動車４３が固定
され、クランク軸２９のクランク室２８から突出する上
端部には駆動車４４が固定されるとともに、従動車４３
と駆動車４４にはベルト４５が巻き回され、クランク軸
２９０回転でカム軸３６を駆動可能としている。The space defined by the cylinder spatula 22 and the head cover 23 is a cam chamber 35. A camshaft 36 is placed vertically in the cam chamber 35, and the upper end of the camshaft 36 is directly supported by a bearing portion 63 formed on the cylinder head 22 itself, as will be described later, and the lower end thereof is supported by a lubrication system, which will be described later. The housing 387 of the oil pump 37 serves as a valve and is indirectly supported by the cylinder head 22. An intake cam 39 and an exhaust cam 40 are formed on the camshaft 36. Intake cam 3
9 and the exhaust cam 40 enable the intake valve and the exhaust valve to be opened via each rocker arm 42 supported by each rocker shaft. In addition, the camshaft 36
A driven wheel 43 is fixed to the upper end of the crankshaft 29 that protrudes from the cam chamber 35 , and a driving wheel 44 is fixed to the upper end of the crankshaft 29 that projects from the crank chamber 28 .
A belt 45 is wound around the drive wheel 44, and the camshaft 36 can be driven by 290 rotations of the crankshaft.
前記シリンダヘッド２２の下面には、前述のように■滑
油ポンプ３７のハウジング３８が、カム軸３６と同軸上
に固定配置されている。潤滑油ポンプ３７にはポンプ室
４６が形成され、ポンプ室４６にはカム軸３６の下端部
から垂下されている連結軸４７に一体化されているイン
ペラ４８が配設されている。、Ｉ？ンゾ室４６の下部に
は吸込路４９が開口されるとともに、その上部には吐出
路５０が開口されている。On the lower surface of the cylinder head 22, the housing 38 of the lubricating oil pump 37 is fixedly arranged coaxially with the camshaft 36 as described above. A pump chamber 46 is formed in the lubricating oil pump 37 , and an impeller 48 that is integrated with a connecting shaft 47 that hangs down from the lower end of the camshaft 36 is disposed in the pump chamber 46 . ,I? A suction passage 49 is opened at the lower part of the intake chamber 46, and a discharge passage 50 is opened at the upper part thereof.
前記中間部材１５０下面略中夫にはオイルノξン５１が
吊叉固定埒れている。上記旬滑油ポンゾ３Ｔの吸込路４
９は、シリンダヘッド２２およびシリンダケース２０に
形成されている油路５２、油路５２に連通し中間部材１
５に垂設されている吸込管５３を介して、オイルパン５
１の潤滑油中に連通可能とされている。すなわち、内燃
機関１６の運転時、潤滑油ポンプ３７はカム軸３６０回
転とともに駆動され、オイルノにン５１内の潤滑油を吐
出路５０側に圧送可能としている。An oil nozzle ξ hole 51 is fixed to the lower surface of the intermediate member 150 substantially at the central shaft. Suction path 4 of the above-mentioned Junyu oil Ponzo 3T
9 is an oil passage 52 formed in the cylinder head 22 and the cylinder case 20, which communicates with the oil passage 52 and connects the intermediate member 1.
The oil pan 5
It is said that it is possible to communicate with the lubricating oil of 1. That is, when the internal combustion engine 16 is operating, the lubricating oil pump 37 is driven together with the rotation of the camshaft 360, so that the lubricating oil in the oil nozzle 51 can be pumped to the discharge passage 50 side.
上記潤滑油ポンプ３γによって圧送された潤滑油は、吐
出路５０から、シリンダヘッド２２およびシリンダケー
ス２０の下面側においてクランク軸２９に向けて形成さ
れている下油路５４に送油されるとともに、シリンダヘ
ッド２２およびシリンダケース２０の上面側においてク
ランク軸２９とカム軸３６を結ぶ方向に形成されている
上油路５５に送油されるようになっている。なお、下油
路５４と上油路５５とは、下油路５４の中間部から分岐
し、シリンダケース２０の側面を上下方向に延設されて
いる図示されない連絡油路によって連通されている。The lubricating oil pumped by the lubricating oil pump 3γ is sent from a discharge passage 50 to a lower oil passage 54 formed toward the crankshaft 29 on the lower surface side of the cylinder head 22 and cylinder case 20, and Oil is supplied to an upper oil passage 55 formed on the upper surface side of the cylinder head 22 and cylinder case 20 in a direction connecting the crankshaft 29 and the camshaft 36. Note that the lower oil passage 54 and the upper oil passage 55 are communicated with each other by a communication oil passage (not shown) that branches from an intermediate portion of the lower oil passage 54 and extends vertically on the side surface of the cylinder case 20.
上記下油路５４に送油された潤滑油は、クランク軸２９
の下端側でオイルシール５６によってシールされている
軸受部に供給され、上記軸受部を潤滑するとともに、ク
ランク軸２９に穿設されている油路５８を経てクランク
ビン３１と連接棒３２の大端部３３とのなす大端軸受部
を潤滑した後、クランク室２８に飛散するようになって
いる。また、上油路５５のクランク軸２９側に向かう潤
滑油は、クランク軸２９の上端側でオイルシール５９に
よってシールされている軸受部に供給され、上記軸受部
を潤滑するとともに、り？ンク軸２９に穿設されている
油路６１を経てクランクビン３１と連接棒３２の大端部
３３とのなす大端軸受部を潤滑した後、クランク室２８
に飛散する。上記のようにクランク室２８内に飛散した
潤滑油は、クランク室２８内を下方に移動し、シリンダ
ケース２０と中間部材１５とによって形成されている戻
し油路６２を経てオイルパン５１内に戻るようになって
いる。The lubricating oil sent to the lower oil passage 54 is transmitted to the crankshaft 29
The oil is supplied to the bearing portion sealed by an oil seal 56 at the lower end side of the crankshaft 29 to lubricate the bearing portion, and is supplied to the large end of the crank bin 31 and the connecting rod 32 via an oil passage 58 bored in the crankshaft 29. After lubricating the big end bearing part formed with the part 33, it is scattered into the crank chamber 28. Further, the lubricating oil flowing toward the crankshaft 29 side of the upper oil passage 55 is supplied to the bearing portion sealed by the oil seal 59 on the upper end side of the crankshaft 29, and lubricates the bearing portion and also lubricates the bearing portion. After lubricating the big end bearing formed by the crank bottle 31 and the big end 33 of the connecting rod 32 through the oil passage 61 bored in the crankshaft 29, the crank chamber 28
Scattered. The lubricating oil scattered in the crank chamber 28 as described above moves downward in the crank chamber 28 and returns to the oil pan 51 through the return oil passage 62 formed by the cylinder case 20 and the intermediate member 15. It looks like this.
ここで、この実施例においては、前述のようにカム軸３
６を直接的に支持しているシリンダヘッド°２２の軸受
部６３の内周面の一部に環状の油溝６４を形成し、上油
路５５を油溝６４に開口している。すなわち、上油路、
５５からカム軸３６に向かう潤滑油は、油溝６４を介し
て、オイルシール６５によってシールされている軸受部
６３に円滑に供給され、その後カム軸３６の外周面に沿
って下方に流下し、吸気カム３９、排気カム４０のカム
面を潤滑する。カム軸３６を潤滑した後の潤滑油は、カ
ム室３５内を下方に移動し、シリンダケース２０および
シリンダヘッド２２に形成されている戻し油路６６を経
てオイルパン５１内に戻るよ５になっている。なお、上
記油溝６４は、軸受部６３の支持面６３Ａにおける軸方
向中央位置（第４図にＣ−Ｃ線で示す）より下方位置に
設定されている。Here, in this embodiment, as described above, the camshaft 3
An annular oil groove 64 is formed in a part of the inner peripheral surface of the bearing part 63 of the cylinder head 22 that directly supports the cylinder head 6, and the upper oil passage 55 is opened into the oil groove 64. Namely, Shangyou Road,
The lubricating oil flowing from 55 to the camshaft 36 is smoothly supplied to the bearing portion 63 sealed by the oil seal 65 through the oil groove 64, and then flows downward along the outer peripheral surface of the camshaft 36. The cam surfaces of the intake cam 39 and exhaust cam 40 are lubricated. After lubricating the camshaft 36, the lubricating oil moves downward in the cam chamber 35 and returns to the oil pan 51 through the return oil passage 66 formed in the cylinder case 20 and the cylinder head 22. ing. Note that the oil groove 64 is set at a position below the axial center position (indicated by line CC in FIG. 4) of the support surface 63A of the bearing portion 63.
次Ｋ、上記実施例の作用について説明する。Next, the operation of the above embodiment will be explained.
内燃機関１６の運転時、クランク軸２９０回転により、
カム軸３６を介して潤滑油ボンダ３７が駆動されると、
オイル、ａン５１内の拐滑油は、潤滑油ボンダ３７の駆
動によって、下油路５４および上油路５５に片送される
。上油路５５に圧送され、カム軸３６に向かう潤滑油は
、油溝６４を経て、円滑に軸受部６３の全周に供給され
た後、カム軸３６の外周面に沿って下方に落下し、吸気
カム３９、排気カム４０のカム面を潤滑し、戻し油路６
６を経てオイルシール５１に戻る。When the internal combustion engine 16 is operating, the crankshaft rotates 290 times,
When the lubricating oil bonder 37 is driven via the camshaft 36,
The lubricating oil in the ann 51 is sent to the lower oil passage 54 and the upper oil passage 55 by driving the lubricating oil bonder 37 . The lubricating oil that is forced into the upper oil passage 55 and directed toward the camshaft 36 passes through the oil groove 64 and is smoothly supplied to the entire circumference of the bearing portion 63, and then falls downward along the outer peripheral surface of the camshaft 36. , the cam surfaces of the intake cam 39 and exhaust cam 40 are lubricated, and the return oil path 6
6 and returns to the oil seal 51.
しかして、この実施例において、油溝６４に送り込まれ
た潤滑油中に混入しているごみ、摩耗粉等は、カム軸３
Ｇへの連れ回りに基づ（遠心力によって油溝６４の奥部
に押し込められ、軸受部６３の支持面６３Ａ側に侵入す
ることがな（、カム軸３６および軸受部６３にかじり等
の損傷を生ずることがない。Therefore, in this embodiment, dirt, abrasion powder, etc. mixed in the lubricating oil fed into the oil groove 64 are removed from the camshaft 64.
Based on the rotation toward G (the centrifugal force pushes the oil deep into the oil groove 64 and prevents it from entering the support surface 63A side of the bearing 63), damage such as galling to the camshaft 36 and the bearing 63 is prevented. will not occur.
なお、この実施例においては、第４図に示したように、
油溝６４が軸受部６３の支持面６３Ａにおける下方位置
に設定されていること７：ｌ）ら、油溝６４に押し込ま
れたごみ、摩耗粉等の一部が重力の影響によって支持面
６３Ａ側に落下するとしても、それら落下するごみ、摩
耗粉等は支持面６３Ａの下端側の比較的狭い範囲を通過
するにすぎず、カム軸３６および軸受部６３の損傷発生
をより確実に防止可能とする。In addition, in this example, as shown in FIG.
Since the oil groove 64 is set at a lower position on the support surface 63A of the bearing part 63 (7:l), some of the dirt, abrasion powder, etc. pushed into the oil groove 64 is pushed to the support surface 63A side due to the influence of gravity. Even if the camshaft 36 and the bearing part 63 are dropped, the falling debris, abrasion powder, etc. only pass through a relatively narrow range on the lower end side of the support surface 63A, making it possible to more reliably prevent damage to the camshaft 36 and the bearing part 63. do.
本発明における油溝６４Ａは、第５図に示すように、下
方に向けて次第に広がる三角形状の溝断面形状からなる
ようにしてもよい。ｆ ７ｊ、油溝６４Ｂは、第６図に
示すように、下方に一拡張部を有する段差状の溝断面形
状からなるものとしてもよい。The oil groove 64A in the present invention may have a triangular cross-sectional shape that gradually widens downward, as shown in FIG. f 7j, the oil groove 64B may have a stepped groove cross-sectional shape with an expanded portion at the bottom, as shown in FIG.
上記油溝６４Ａ、６４Ｂによれば、潤滑油中に混入して
いるごみ、摩耗粉等を遠心力および重力の作用下で、そ
れらの奥深くにより安定的に押し込み。According to the oil grooves 64A and 64B, dirt, abrasion particles, etc. mixed in the lubricating oil are stably pushed deep into the lubricating oil under the action of centrifugal force and gravity.
支持面６３Ａ側への落下の可能性をより確実に排除可能
と−［る。The possibility of falling onto the support surface 63A side can be more reliably eliminated.
なお、上記実施例はカム軸３６を支持可能とする１１１
１受構造に本発明を適用する場合について説明ｌまたが
２本発明はクランク軸等の他の回転軸を支持釘１泪とす
る軸受構造にも同様に適用可能である。Note that in the above embodiment, the camshaft 36 is supported by the camshaft 111.
Description of the case where the present invention is applied to a single bearing structure The present invention can be similarly applied to a bearing structure in which another rotating shaft such as a crankshaft is a supporting nail.
また、上記実施例は回転軸を縦置き配置する軸受構造に
本発明を適用する場合について説明したが。Further, in the above embodiments, the present invention is applied to a bearing structure in which the rotating shaft is vertically arranged.
本発明は回転軸を横置き配置する軸受構造にも適用可能
である。The present invention is also applicable to a bearing structure in which the rotating shaft is placed horizontally.
以上のように５本発明は、機関本体そのものに回転軸を
支持可能とする軸受部を形成してなる船舶推進機用内燃
機関の軸受構造において、上記軸受部の内周面の一部に
環状の油溝を形成し、機関本体に設け１こ潤滑油送油路
を上記油溝に開口するようにしたものである。したがっ
て、油溝に送ジ込まれた潤滑油中に混入しているごみ、
摩耗粉等は１回転軸への連れ回りに基づく遠ｒｕ力によ
って油溝の奥部に押し込められ、軸受部の回転軸支持面
側に侵入することがなく、軸受部および回転軸にかじジ
等の損傷を生ずることがない。As described above, the present invention provides a bearing structure for an internal combustion engine for a marine propulsion engine in which a bearing part capable of supporting a rotating shaft is formed in the engine body itself, in which a part of the inner circumferential surface of the bearing part has an annular shape. An oil groove is formed in the engine body, and one lubricating oil supply passage is opened into the oil groove. Therefore, dirt mixed in the lubricating oil sent into the oil groove,
Abrasion particles, etc. are pushed into the deep part of the oil groove by the long ru force based on the co-rotation of the rotating shaft, and do not enter the rotating shaft support surface of the bearing. No damage will occur.
第１図は本発明の一実施例が適用されてなる船外機を示
す側面図、第２図は同船外機の内燃機関を示す断面図、
第３図は第２図の要部を取出して示す断面図、第４図は
第３図の要部を拡大して示す断面図、第５図および第６
図はそれぞれ本発明の変形例を示す断面図である。
２２・・・シリンダヘッド、３６・・・カム軸−５５・
・・上前路、６３・・・軸受部、６４，６４Ａ、６４Ｂ
・・・油溝。
代理人 弁理士 塩 川 修 治FIG. 1 is a side view showing an outboard motor to which an embodiment of the present invention is applied, and FIG. 2 is a sectional view showing an internal combustion engine of the outboard motor.
Figure 3 is a cross-sectional view showing the main part of Figure 2, Figure 4 is a cross-sectional view showing the main part of Figure 3 in an enlarged manner, and Figures 5 and 6 are
Each figure is a sectional view showing a modification of the present invention. 22... Cylinder head, 36... Camshaft -55.
... Upper front road, 63... Bearing part, 64, 64A, 64B
...Oil groove. Agent Patent Attorney Osamu Shiokawa
Claims (1)
受部を形成してなる船舶推進機用内燃機関の軸受構造に
おいて、上記軸受１部の内周面の一部に環状の油溝を形
成し５機関本体に設けた潤滑油送油路を上記油溝に開口
することを特徴とする船舶推進機用内燃機関の軸受構造
。(1) In a bearing structure for an internal combustion engine for a marine propulsion engine in which a bearing part capable of supporting a rotating shaft is formed in the engine body itself, an annular oil groove is formed in a part of the inner peripheral surface of the first part of the bearing. 5. A bearing structure for an internal combustion engine for a marine propulsion device, characterized in that a lubricating oil feed path provided in the engine body opens into the oil groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15417583A JPS6049120A (en) | 1983-08-25 | 1983-08-25 | Bearing structure of internal-combustion engine for vessel propelling machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15417583A JPS6049120A (en) | 1983-08-25 | 1983-08-25 | Bearing structure of internal-combustion engine for vessel propelling machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6049120A true JPS6049120A (en) | 1985-03-18 |
Family
ID=15578471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15417583A Pending JPS6049120A (en) | 1983-08-25 | 1983-08-25 | Bearing structure of internal-combustion engine for vessel propelling machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6049120A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4681067A (en) * | 1985-06-12 | 1987-07-21 | Kawasaki Jukogyo Kabushiki Kaisha | Liquid-cooled engine of the vertical shaft type |
-
1983
- 1983-08-25 JP JP15417583A patent/JPS6049120A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4681067A (en) * | 1985-06-12 | 1987-07-21 | Kawasaki Jukogyo Kabushiki Kaisha | Liquid-cooled engine of the vertical shaft type |
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