JP2583267B2 - Rocker arm device for four-cycle engine - Google Patents
Rocker arm device for four-cycle engineInfo
- Publication number
- JP2583267B2 JP2583267B2 JP1726688A JP1726688A JP2583267B2 JP 2583267 B2 JP2583267 B2 JP 2583267B2 JP 1726688 A JP1726688 A JP 1726688A JP 1726688 A JP1726688 A JP 1726688A JP 2583267 B2 JP2583267 B2 JP 2583267B2
- Authority
- JP
- Japan
- Prior art keywords
- rocker arm
- hole
- rocker
- pivot
- oil supply
- 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 - Lifetime
Links
- 238000005520 cutting process Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
Classifications
-
- 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
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、四サイクルエンジンのロッカーアーム装
置に関する。Description: TECHNICAL FIELD The present invention relates to a rocker arm device for a four-stroke engine.
四サイクルエンジンは、クランクシャフトに連動して
回転するカムシャフトのカムによって、ロッカーアーム
を揺動させ、傘形の吸気用と排気用のバルブをバネに抗
して押下げて開くようにしている。そして、ロッカーア
ームには、基端をピボットに支承させたエンドピボット
型と、中間をロッカーシャフに軸支したシーソー型があ
る。又、ロッカーアームには、アジャストスクリューを
螺着して、その位置を調節してバルブとの隙間を調節す
るアジャスターを設けているが、調節の手間がかかるの
で、油圧タペットにロッカーアームを支承させ、自動的
に油圧でバルブ隙間を調節する油圧タペットを用いたも
のがある。例えば、実開昭60−162204号公報、特公昭49
−15162号公報参照。油圧タペットを用いる場合には、
シリンダーヘッドに油圧タペットを挿入する孔を設け、
この孔に、シリンダーヘッドに穿設した給油孔とエアー
ベント孔を連通させる必要があり、シリンダーヘッドの
形状が複雑になり、給油孔及びエアーベント孔を設ける
ために構造上の制限を受けるなど、シリンダーヘッドの
形状、切削加工が複雑になって製造コストが大巾に高く
つく不都合がある。The four-stroke engine uses a camshaft cam that rotates in conjunction with the crankshaft to swing the rocker arm so that the umbrella-shaped intake and exhaust valves are pushed down and opened against the springs. . The rocker arm includes an end pivot type in which a base end is supported by a pivot and a seesaw type in which an intermediate portion is pivotally supported by a rocker shuff. Also, the rocker arm is provided with an adjuster that adjusts its position by screwing an adjusting screw to adjust the gap with the valve.However, it takes time to adjust the rocker arm. Some use a hydraulic tappet that automatically adjusts the valve clearance with hydraulic pressure. For example, Japanese Utility Model Publication No. 60-162204,
See JP-A-15162. When using hydraulic tappets,
A hole for inserting a hydraulic tappet is provided in the cylinder head,
It is necessary to communicate the oil supply hole and the air vent hole drilled in the cylinder head to this hole, the shape of the cylinder head becomes complicated, and there are structural restrictions to provide the oil supply hole and the air vent hole. There is an inconvenience that the shape and cutting process of the cylinder head are complicated and the production cost is greatly increased.
この発明は、一方のロッカーアームを軸支するロッカ
ーシャフトに給油孔とエアーベント孔を設けると共に横
孔を設け、横孔に上端にピボットを設けた油圧タペット
を挿入し、他方のロッカーアームの基端をビボットに支
承させ、シリンダーヘッドに油圧タペットを取付けたり
給油孔を設けないようにして、シリンダーヘッドの形状
切削加工を簡単にできて、製造コストを安価にできる四
サイクルエンジンのロッカーアーム装置を得ることを目
的とする。According to the present invention, a rocker shaft supporting one rocker arm is provided with an oil supply hole and an air vent hole, a horizontal hole is provided, a hydraulic tappet having a pivot at the upper end is inserted into the horizontal hole, and a base of the other rocker arm is inserted. A rocker arm device for a four-stroke engine that allows the end to be supported by a bibot, does not attach a hydraulic tappet to the cylinder head, and does not provide a lubrication hole, simplifies cylinder head shape cutting, and reduces manufacturing costs. The purpose is to gain.
以下、本発明を図面に示す実施例によって説明する。 Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.
シリンダーヘッド１には、燃焼室２に吸気孔３と排気
孔４が通じるように設けてあり、吸気孔３端には、傘形
の吸気用のバルブ５が摺動できバネ６で閉じるように付
勢して設けてあり、排気孔４端には、同様に排気用のバ
ルブ７がバネ８に抗して摺動して開くように設けてあ
る。バルブ７側の一方のロッカーアーム９は、シーソー
型で、中間をシリンダーヘッド１に軸架したロッカーシ
ャフト10に軸着し、基端をカムシャフト11のカム12に当
て、先端をバルブ７の上端に当てるようにしてあり、当
る部分に油圧タペット13が設けてある。ロッカーシャフ
ト10には、軸方向に給油抗14とエアーベント孔15が設け
てある。又、横孔16を設けて、上端にピボット17を設け
た油圧タペット18を挿入する。ピボット17には、吸気用
のバルブ５の他方のロッカーアーム19の基端を支承させ
てある。ローカーアーム19の先端は、吸気用のバルブ５
の上端に乗せてあり、上面がカムシャフト11のカム12に
接するようにしてある。An intake hole 3 and an exhaust hole 4 are provided in the cylinder head 1 so as to communicate with the combustion chamber 2. At the end of the intake hole 3, an umbrella-shaped intake valve 5 can slide and be closed by a spring 6. An exhaust valve 7 is similarly provided at the end of the exhaust hole 4 so as to slide and open against the spring 8. One rocker arm 9 on the valve 7 side is a seesaw type, the center of which is axially mounted on a rocker shaft 10 which is suspended on the cylinder head 1, the base end of which is applied to the cam 12 of the camshaft 11, and the distal end is the upper end of the valve 7. , And a hydraulic tappet 13 is provided at the contact portion. The rocker shaft 10 is provided with an oil supply 14 and an air vent hole 15 in the axial direction. Further, a hydraulic tappet 18 having a horizontal hole 16 and a pivot 17 at the upper end is inserted. The pivot 17 supports the base end of the other rocker arm 19 of the intake valve 5. The tip of the rocker arm 19 is the intake valve 5
And the upper surface thereof is in contact with the cam 12 of the camshaft 11.
〔発明の作用〕 クランクシャフトに連動してカムシャフト11のカム12
が回転すると、ロッカーアーム19をピボット17を中心に
揺動させて、吸気用のバルブ５を押下げて開く。又、ロ
ッカーシャフト10に軸支したロッカーアーム９を揺動さ
せて、排気用のバルブ７を押下げて開く。クランクシャ
フトに連動するオイルポンプのオイルが、ロッカーシャ
フト10の給油孔14に圧送され、油圧タペット18を押上げ
て、ロッカーアーム19とバルブ５の隙間を零に自動調節
する。油圧タペット18を挿入する横孔16と給油孔14及び
エアーベント孔15をロッカーシャフト10に設けるので、
シリンダーヘッド１に設ける油孔用の肉盛り部分が減
り、シリンダーヘッド１の形状が簡単になり、鋳造作業
及び切削加工が簡単になって、大巾なコストダウンがで
きる。[Operation of the Invention] The cam 12 of the camshaft 11 interlocked with the crankshaft
When is rotated, the rocker arm 19 is swung about the pivot 17, and the intake valve 5 is pushed down to open. Further, the rocker arm 9 pivotally supported by the rocker shaft 10 is swung, and the exhaust valve 7 is pushed down and opened. The oil from the oil pump linked to the crankshaft is pumped to the oil supply hole 14 of the rocker shaft 10 to push up the hydraulic tappet 18 to automatically adjust the gap between the rocker arm 19 and the valve 5 to zero. Since the horizontal hole 16 for inserting the hydraulic tappet 18, the oil supply hole 14, and the air vent hole 15 are provided in the rocker shaft 10,
The number of overfill portions for oil holes provided in the cylinder head 1 is reduced, the shape of the cylinder head 1 is simplified, casting and cutting work are simplified, and a large cost reduction can be achieved.
以上説明したように、この発明は、一方のロッカーア
ームを軸支するロッカーシャフトに給油孔とエアーベン
ト孔を軸方向に穿設し、ロッカーシャフトに横孔を設け
て給油孔とエアーベント孔に通じさせ、該横孔に上端に
ピボットを設けた油圧タペットを挿入し、ピボットに他
方のロッカーアームの基端を支承させたので、ロッカー
シャフトに油圧タペットを取付けることができて、シリ
ンダーヘッドの形状を簡単にすることができ、鋳造作業
及び切削加工が簡単になって、大巾なコストダウンを図
ることができる。As described above, according to the present invention, an oil supply hole and an air vent hole are formed in a rocker shaft that supports one rocker arm in the axial direction, and a lateral hole is provided in the rocker shaft so that the oil supply hole and the air vent hole are formed. The hydraulic tappet provided with a pivot at the upper end was inserted into the lateral hole, and the pivot supported the base end of the other rocker arm, so that the hydraulic tappet could be attached to the rocker shaft, and the shape of the cylinder head was improved. Can be simplified, the casting operation and the cutting work can be simplified, and the cost can be greatly reduced.
図は本発明の一実施例を示し、第１図は縦断正面図、第
２図は第１図Ａ−Ａ矢視断面図である。 ９……ロッカーアーム、10……ロッカーシャフト、14…
…給油孔、15……エアーベント孔、16……横孔、17……
ピボット、18……油圧タペット、19……ロッカーアー
ム。1 shows an embodiment of the present invention. FIG. 1 is a vertical sectional front view, and FIG. 2 is a sectional view taken along the line AA of FIG. 9 ... rocker arm, 10 ... rocker shaft, 14 ...
... oil supply hole, 15 ... air vent hole, 16 ... horizontal hole, 17 ...
Pivot, 18 hydraulic tappet, 19 rocker arm.
Claims (1)
シャフトに給油孔とエアーベント孔を軸方向に穿設し、
ロッカーシャフトに横孔を設けて給油孔とエアーベント
孔に通じさせ、該横孔に上端にピボットを設けた油圧タ
ペットを挿入し、ピボットに他方のローカーアームの基
端を支承させるようにしたことを特徴とする四サイクル
エンジンのロッカーアーム装置。An oil supply hole and an air vent hole are formed in a rocker shaft that supports one rocker arm in the axial direction,
A horizontal hole is provided in the rocker shaft so as to communicate with the oil supply hole and the air vent hole, a hydraulic tappet provided with a pivot at the upper end is inserted into the horizontal hole, and the pivot supports the base end of the other rocker arm. A rocker arm device for a four-stroke engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1726688A JP2583267B2 (en) | 1988-01-29 | 1988-01-29 | Rocker arm device for four-cycle engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1726688A JP2583267B2 (en) | 1988-01-29 | 1988-01-29 | Rocker arm device for four-cycle engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01193009A JPH01193009A (en) | 1989-08-03 |
| JP2583267B2 true JP2583267B2 (en) | 1997-02-19 |
Family
ID=11939164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1726688A Expired - Lifetime JP2583267B2 (en) | 1988-01-29 | 1988-01-29 | Rocker arm device for four-cycle engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2583267B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3132022B2 (en) * | 1991-02-22 | 2001-02-05 | スズキ株式会社 | Cylinder head structure of internal combustion engine |
| CN101900054B (en) * | 2010-04-20 | 2012-02-15 | 重庆长安汽车股份有限公司 | Engine cylinder cover with hydraulic tappet hole oil channel structures and oil channel machining method |
| CN112160811A (en) * | 2020-10-26 | 2021-01-01 | 安徽康明斯动力有限公司 | Brake valve mechanism in engine cylinder |
-
1988
- 1988-01-29 JP JP1726688A patent/JP2583267B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01193009A (en) | 1989-08-03 |
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