JPS6319579Y2 - - Google Patents
Info
- Publication number
- JPS6319579Y2 JPS6319579Y2 JP1980010274U JP1027480U JPS6319579Y2 JP S6319579 Y2 JPS6319579 Y2 JP S6319579Y2 JP 1980010274 U JP1980010274 U JP 1980010274U JP 1027480 U JP1027480 U JP 1027480U JP S6319579 Y2 JPS6319579 Y2 JP S6319579Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil pan
- shaft
- balancer shaft
- internal combustion
- combustion engine
- 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.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 101150006573 PAN1 gene Proteins 0.000 description 9
- 238000003780 insertion Methods 0.000 description 8
- 230000037431 insertion Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【考案の詳細な説明】
本考案はオイルパン内部空間にバランサシヤフ
トを設けた横型多気筒内燃機関のオイルパンに関
する。[Detailed Description of the Invention] The present invention relates to an oil pan for a horizontal multi-cylinder internal combustion engine in which a balancer shaft is provided in the interior space of the oil pan.
２サイクル多気筒機関や奇数の気筒数を有した
４サイクル多気筒機関においてはクランクシヤフ
トにバランスウエイトを設けるだけの構成では各
気筒における往復運動部の１次、２次慣性力又は
１次、２次慣性偶力を良好にバランスさせること
が難しく、両者との良好にバランスさせるために
はクランクシヤフトとは別体にバランサシヤフト
を取り付ける必要がある。 In a 2-stroke multi-cylinder engine or a 4-stroke multi-cylinder engine with an odd number of cylinders, a configuration that only provides a balance weight on the crankshaft will reduce the primary and secondary inertia forces of the reciprocating parts in each cylinder. It is difficult to properly balance the secondary inertia couple, and in order to achieve a good balance between the two, it is necessary to install a balancer shaft separately from the crankshaft.
この場合、２サイクル機関ではクランクシヤフ
トの回転数に等しく回転する排気バルブ開閉用カ
ムシヤフトにバランスウエイトを取り付けてバラ
ンサシヤフトとすることができるが、４サイクル
機関ではカムシヤフトの回転速度がクランクシヤ
フトの1/2であるためカムシヤフトをバランサシ
ヤフトとして利用できず別途バランサシヤフトが
必要となる。 In this case, in a 2-stroke engine, a balance weight can be attached to the camshaft for opening and closing the exhaust valve, which rotates at the same speed as the crankshaft, to create a balancer shaft, but in a 4-stroke engine, the camshaft's rotational speed is 1/1/1 of the crankshaft. 2, the camshaft cannot be used as a balancer shaft and a separate balancer shaft is required.
クランクシヤフトが水平軸として配置される横
型多気筒内燃機関においては、かかるバランサシ
ヤフトをオイルパンの内部空間に組み込むことは
機関の大型化を規制する上で有利である。しか
し、この場合、クランクケースの下面に固定した
複数のシヤフト支持台にバランサシヤフトを軸受
けするという一般的な取付方法では複数個のシヤ
フト支持台を組み立てるため組み立て工程が増大
し、かつその組立作業もシム等の調整による高精
度な芯出し作業を伴なう極めて面倒な作業である
ため作業能率が極めて低下しひいてはコストアツ
プにつながるものであつた。 In a horizontal multi-cylinder internal combustion engine in which the crankshaft is arranged as a horizontal axis, it is advantageous to incorporate such a balancer shaft into the internal space of the oil pan in order to limit the increase in size of the engine. However, in this case, the general mounting method of bearing the balancer shaft on multiple shaft supports fixed to the bottom surface of the crankcase increases the assembly process because multiple shaft supports are assembled. This is an extremely troublesome work that involves highly accurate centering work by adjusting shims, etc., resulting in extremely low work efficiency and an increase in costs.
本考案はかかる従来の実情に鑑み為されたもの
でバランサシヤフトを軸受けする複数のシヤフト
支持台をオイルパン側壁に一体に鋳造成形したオ
イルパンを提供するものであり、バランサシヤフ
トの組立作業能率を著しく向上させると共に、オ
イルパンの剛性を高めてクランクケースとの共振
騒音低減機能をも同時に図れるものである。 The present invention was devised in view of the conventional situation, and provides an oil pan in which a plurality of shaft supports for bearing a balancer shaft are integrally cast on the side wall of the oil pan, thereby increasing the efficiency of the assembly work of the balancer shaft. In addition to significantly improving the oil pan, it also increases the rigidity of the oil pan and reduces resonance noise with the crankcase.
以下に本考案を図面に示す実施例に基づいて詳
細に説明する。第１図は本考案に係るオイルパン
によつてバランサシヤフトを取り付けた横型多気
筒内燃機関のオイルパン内部空間の構成を示す。
アルミ鋳物製のオイルパン１にはその両内側壁に
股がるシヤフト支持台１１が前後方向に間隔を隔
てて３箇所に一体鋳造成形してある。これらシヤ
フト支持台１１の中央部には水平軸として配置さ
れたクランクシヤフト２の軸線と平行な同一軸線
上にシヤフト挿通孔１１ａが形成されている。 The present invention will be described in detail below based on embodiments shown in the drawings. FIG. 1 shows the configuration of the interior space of an oil pan of a horizontal multi-cylinder internal combustion engine to which a balancer shaft is attached using an oil pan according to the present invention.
An oil pan 1 made of cast aluminum is integrally cast with three shaft support stands 11 that span both inner walls of the oil pan 1 and are spaced apart from each other in the front-rear direction. A shaft insertion hole 11a is formed in the center of each of these shaft supports 11 on the same axis parallel to the axis of the crankshaft 2 arranged as a horizontal axis.
オイルパン１の前端壁にはシヤフト支持台１１
のシヤフト挿通孔１１ａに対向する部分にシヤフ
ト挿入孔１ａが開設してある。該シヤフト挿入孔
１ａから挿入したバランサシヤフト本体３Ａを３
個のシヤフト支持台１１のシヤフト挿通孔１１ａ
に貫通して取り付けた後、シヤフト本体３Ａの中
間部と後端部に適当な重量に設計されたバランス
ウエイト３Ｂを装着してバランサシヤフト３を完
成する。該バランサシヤフト３の前端部にはバラ
ンサシヤフトギヤ４を嵌挿しナツト１５で締結す
る。 A shaft support 11 is installed on the front end wall of the oil pan 1.
A shaft insertion hole 1a is formed in a portion opposite to the shaft insertion hole 11a. The balancer shaft body 3A inserted through the shaft insertion hole 1a is
Shaft insertion hole 11a of shaft support base 11
After the balancer shaft 3 is attached to the shaft body 3A, a balance weight 3B designed to have an appropriate weight is attached to the middle part and the rear end part of the shaft body 3A to complete the balancer shaft 3. A balancer shaft gear 4 is fitted into the front end of the balancer shaft 3 and fastened with a nut 15.
こうしてバランサシヤフト３を取り付けた後、
前記シヤフト挿入孔１ａを盲蓋１ｂによつて密栓
したオイルパン１の外縁フランジ部１ｃをクラン
クケース６の下面にボルト締めして接続し、バラ
ンサシヤフトギヤ４をクランクギヤ５に噛合させ
る。尚、バランサシヤフトギヤ４の歯数はクラン
クギヤ５を同一の歯数に形成されている。 After installing balancer shaft 3 in this way,
The outer edge flange portion 1c of the oil pan 1, whose shaft insertion hole 1a is hermetically sealed with a blind lid 1b, is connected to the lower surface of the crankcase 6 by tightening bolts, and the balancer shaft gear 4 is meshed with the crank gear 5. Note that the balancer shaft gear 4 has the same number of teeth as the crank gear 5.
従つて機関運転時、クランクギヤ５と噛合する
バランサシヤフトギヤ４を介してバランサシヤフ
ト３がクランクシヤフト２と同一速度で連動回転
し、各気筒の往復運動部に生じる１次慣性力又は
１次慣性偶力を良好にバランスさせて機関の低周
波振動を効果的に防止できる。 Therefore, when the engine is operating, the balancer shaft 3 rotates in conjunction with the crankshaft 2 at the same speed through the balancer shaft gear 4 that meshes with the crank gear 5, and the primary inertia force or primary inertia generated in the reciprocating portion of each cylinder is It is possible to effectively prevent low-frequency vibrations of the engine by balancing the force couple well.
かかる構成において、オイルパン１にシヤフト
支持台１１が一体成形してなるため、シヤフト支
持台の組み付け作業が不要となると共に、総ての
シヤフト支持台１１のシヤフト挿通孔１１ａを同
時に加工することができるため面倒な芯出し作業
を行なうことなく芯ずれを極く小さく抑制できバ
ランサシヤフト３を高精度に組み付けできる。 In this configuration, since the shaft support 11 is integrally molded with the oil pan 1, there is no need to assemble the shaft support, and the shaft insertion holes 11a of all the shaft support 11 can be processed at the same time. As a result, misalignment can be suppressed to an extremely small level without performing troublesome centering work, and the balancer shaft 3 can be assembled with high precision.
又、シヤフト支持台１１が補強リブとして機能
しオイルパン１全体の剛性を高めるためオイルパ
ン１のクランクケース４との共振による高周波振
動も良好に抑制され、機関の全速域に亘つて振動
騒音を低減できる。さらにかかる剛性のアツプに
伴ない本実施例の如くオイルパン１をアルミ鋳物
で成形しても充分な強度を確保でき、オイルパン
１を軽量化できる。シヤフト支持台１１とは別に
図で鎖線に示したように補強リブ１２等を別途設
けてもよい。 In addition, the shaft support 11 functions as a reinforcing rib and increases the rigidity of the entire oil pan 1, so high-frequency vibrations due to resonance of the oil pan 1 with the crankcase 4 are well suppressed, reducing vibration noise throughout the entire speed range of the engine. Can be reduced. Furthermore, as the rigidity increases, even if the oil pan 1 is made of aluminum casting as in this embodiment, sufficient strength can be ensured and the weight of the oil pan 1 can be reduced. Separately from the shaft support base 11, reinforcing ribs 12 and the like may be provided separately as shown by chain lines in the figure.
尚、第２図に示したようにアルミ鋳物で成形し
たオイルパン本体２１Ａの外壁面をスポンジラバ
ー層２１Ｂ等を介して鋼板製カバー２１Ｃで被覆
接着してなるいわゆるC.F.S（クロスフイツテング
シールド）構造のオイルパン２１としてもよく、
タイヤで跳ね飛ばされた石等がオイルパン２１に
衝突した時の衝撃をスポンジラバー層２１Ｂで緩
衝でき、かつ鋼板製カバー２１Ｃに硬度もアルミ
材に比べて大きいため外表面の損傷、変形を抑制
できる。 As shown in Fig. 2, a so-called CFS (Cross Fitting Shield) is formed by covering and adhering the outer wall surface of an oil pan body 21A made of aluminum casting with a steel plate cover 21C via a sponge rubber layer 21B or the like. It may also be used as the oil pan 21 of the structure,
The sponge rubber layer 21B can buffer the impact when stones, etc. thrown by tires collide with the oil pan 21, and the steel plate cover 21C has greater hardness than aluminum, preventing damage and deformation of the outer surface. can.
以上説明したように本考案によればオイルパン
内部空間に配設されるバランサシヤフトを軸受け
する複数のシヤフト支持台をオイルパン側壁に一
体に鋳造成形したから、組立作業が著しく能率化
されると共にバランサシヤフトの組付精度が向上
する。 As explained above, according to the present invention, a plurality of shaft supports for bearing the balancer shaft disposed in the internal space of the oil pan are integrally cast on the side wall of the oil pan, which greatly streamlines the assembly work. The assembly accuracy of the balancer shaft is improved.
又、シヤフト支持台がオイルパンの剛性を高め
て、高周波振動を抑制し、バランサシヤフトによ
る低周波振動の抑制と併せて振動騒音低減機能が
向上すると共にかかる剛性のアツプに伴ないアル
ミ鋳物等の軽金属材料でオイルパンを成形でき軽
量化にもつながる。 In addition, the shaft support increases the rigidity of the oil pan and suppresses high-frequency vibrations, and the balancer shaft suppresses low-frequency vibrations, improving the vibration and noise reduction function. The oil pan can be molded from a light metal material, leading to weight reduction.
第１図Ａは本考案に係るオイルパンを備えた内
燃機関のオイルパン内部空間の構成を示す縦断面
図、同図Ｂは同図ＡのＸ−Ｘ矢視図、第２図は本
考案の別の実施例に係るオイルパンの一部断面図
である。
１，２１……オイルパン、２……クランクシヤ
フト、３……バランサシヤフト、１１……シヤフ
ト支持台、１１ａ……シヤフト挿通孔。
FIG. 1A is a longitudinal sectional view showing the structure of the internal space of an oil pan of an internal combustion engine equipped with an oil pan according to the present invention, FIG. 1B is a view taken along the line X-X in FIG. FIG. 3 is a partial cross-sectional view of an oil pan according to another embodiment of the present invention. 1, 21... Oil pan, 2... Crankshaft, 3... Balancer shaft, 11... Shaft support base, 11a... Shaft insertion hole.
Claims (1)
えたものにおいて、クランクシヤフトに連動回
転するバランサシヤフトを軸受けする複数のシ
ヤフト支持台がオイルパン側壁に一体に鋳造成
形されたことを特徴とする内燃機関用オイルパ
ン。 (2) オイルパンはアルミ鋳物で一体成形されてな
る実用新案登録請求の範囲第１項記載の内燃機
関用オイルパン。 (3) オイルパンはアルミ鋳物製オイルパン本体の
外壁面がラバー層を介して鋼板カバーで被覆さ
れた構造を有してなる実用新案登録請求の範囲
第１項記載の内燃機関用オイルパン。[Scope of Claim for Utility Model Registration] (1) In a horizontal multi-cylinder internal combustion engine equipped with a balancer shaft, a plurality of shaft supports that bear the balancer shaft that rotates in conjunction with the crankshaft are integrally cast and molded on the side wall of the oil pan. An oil pan for internal combustion engines characterized by: (2) The oil pan for an internal combustion engine according to claim 1, wherein the oil pan is integrally formed from aluminum casting. (3) The oil pan for an internal combustion engine according to claim 1, wherein the oil pan has a structure in which the outer wall surface of an oil pan body made of cast aluminum is covered with a steel plate cover via a rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980010274U JPS6319579Y2 (en) | 1980-02-01 | 1980-02-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980010274U JPS6319579Y2 (en) | 1980-02-01 | 1980-02-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56113143U JPS56113143U (en) | 1981-09-01 |
| JPS6319579Y2 true JPS6319579Y2 (en) | 1988-06-01 |
Family
ID=29606937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980010274U Expired JPS6319579Y2 (en) | 1980-02-01 | 1980-02-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6319579Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS471128U (en) * | 1971-01-16 | 1972-08-11 | ||
| JPS543252U (en) * | 1977-06-10 | 1979-01-10 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5641065Y2 (en) * | 1976-04-09 | 1981-09-25 |
-
1980
- 1980-02-01 JP JP1980010274U patent/JPS6319579Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS471128U (en) * | 1971-01-16 | 1972-08-11 | ||
| JPS543252U (en) * | 1977-06-10 | 1979-01-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56113143U (en) | 1981-09-01 |
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