JP2565521B2 - Hydraulic tappet lubricator for four-cycle engine - Google Patents

Hydraulic tappet lubricator for four-cycle engine

Info

Publication number
JP2565521B2
JP2565521B2 JP32989287A JP32989287A JP2565521B2 JP 2565521 B2 JP2565521 B2 JP 2565521B2 JP 32989287 A JP32989287 A JP 32989287A JP 32989287 A JP32989287 A JP 32989287A JP 2565521 B2 JP2565521 B2 JP 2565521B2
Authority
JP
Japan
Prior art keywords
hydraulic tappet
rocker
hole
rocker arm
oil
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
Application number
JP32989287A
Other languages
Japanese (ja)
Other versions
JPH01177401A (en
Inventor
秀雄 藤原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Co Ltd
Original Assignee
Suzuki Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzuki Co Ltd filed Critical Suzuki Co Ltd
Priority to JP32989287A priority Critical patent/JP2565521B2/en
Publication of JPH01177401A publication Critical patent/JPH01177401A/en
Application granted granted Critical
Publication of JP2565521B2 publication Critical patent/JP2565521B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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油圧タペット給油
装置に関する。
TECHNICAL FIELD The present invention relates to a hydraulic tappet oil supply device for a four-cycle engine.

〔従来の技術とその問題点〕[Conventional technology and its problems]

四サイクルエンジンは、カムシャフトのカムでロッカ
ーアームを駆動し、吸気弁及び排気弁を開閉している。
ロッカーアームは、シリンダーヘッドの孔に挿入した油
圧タペットで、潤滑オイルの油圧を加えて押付け、ロッ
カーアームと吸気弁又は排気弁の隙間が零に保たれるよ
うにして、隙間を調節する手間を省いている。例えば、
特開昭59−74313号公報、実開昭59−105006号公報参
照。この装置では、油圧タペットに給油する油圧を送る
孔をシリンダーヘッドに穿設して設けておく必要があ
る。シリンダーヘッドは、給排気弁やカムシャフトなど
の動弁系が配置されて構造が複雑であり、これらをさけ
て、シリンダーヘッドに油孔を穿設するので、油孔の系
路が複雑になり、加工が面倒で手間がかかり、コスト高
につく不都合がある。
In a four-cycle engine, a cam of a cam shaft drives a rocker arm to open and close an intake valve and an exhaust valve.
The rocker arm is a hydraulic tappet that is inserted into the hole of the cylinder head.The oil pressure of lubricating oil is applied and pressed against the rocker arm so that the clearance between the rocker arm and the intake valve or exhaust valve is kept at zero, and the time and effort to adjust the clearance are reduced. I omit it. For example,
See JP-A-59-74313 and JP-A-59-105006. In this device, it is necessary to form a hole in the cylinder head for sending the hydraulic pressure for supplying the hydraulic tappet. The cylinder head has a complicated structure in which a valve operating system such as an air supply / exhaust valve and a camshaft is arranged, and by avoiding these, an oil hole is bored in the cylinder head, so the system path of the oil hole becomes complicated. However, there is a disadvantage that the processing is troublesome, time-consuming, and costly.

〔発明の目的〕[Object of the Invention]

この発明は、ロッカーアームを軸支するロッカーシャ
フトに同芯油孔を設けて、この同芯油孔から油圧タペッ
トに給油できるようにして、シリンダーヘッドに穿設す
る油孔を少くし、シリンダーヘッドの鋳造工数、加工工
数を削減して安価でコンパクトに油圧タペットに給油で
きる四サイクルエンジンの油圧タペット給油装置を得る
ことを目的とする。
According to the present invention, a rocker shaft that pivotally supports a rocker arm is provided with a concentric oil hole so that oil can be supplied to a hydraulic tappet from the concentric oil hole, and the number of oil holes drilled in a cylinder head is reduced. It is an object of the present invention to obtain a hydraulic tappet refueling device for a four-cycle engine, which is capable of inexpensively and compactly refueling a hydraulic tappet by reducing the number of casting and processing steps.

〔発明の構成〕[Structure of Invention]

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 the embodiments shown in the drawings.

シリンダーヘッド1の下面に設けた燃焼室2には、吸
気孔3と排気孔4が設けてあり、各々吸気弁5と排気弁
6が摺動自在に端部に装着してあり、バネで閉じるよう
に付勢してある。一方のロッカーアーム7は、エンドピ
ボット型で、基部をピボット8に支承してある。ピボッ
ト8は、シリンダーヘッド1に設けた孔9に挿入した油
圧タペット10の上端に設けてある。他方のロッカーアー
ム11は、シーソー型で、シリンダーヘッド1に貫通する
ように取付けたロッカーシャフト12に軸支してある。一
方のロッカーアーム11の先端には、油圧タペット13が摺
動可能に装着してある。ロッカーアーム7及び11は、ク
ランク軸に連動するカムシャフト14の吸気カム15と排気
カム16に接している。油圧タペット10を挿入する孔9
は、ロッカーシャフト12の側面に接して設けてあり、ロ
ッカーシャフト12には、同芯油孔17が設けてあって、横
孔18で、油圧タペット10の側面と通じさせてある。一
方、同芯油孔17に設けた横孔19は、他方のロッカーアー
ム11に穿設した油孔20に通じていて、先端の油圧タペッ
ト13に連通するようにしてある。
An intake hole 3 and an exhaust hole 4 are provided in the combustion chamber 2 provided on the lower surface of the cylinder head 1, and an intake valve 5 and an exhaust valve 6 are slidably attached to the ends of the combustion chamber 2 and closed by a spring. Is urged. One of the rocker arms 7 is an end pivot type, and its base is supported by the pivot 8. The pivot 8 is provided at the upper end of the hydraulic tappet 10 inserted into the hole 9 provided in the cylinder head 1. The other rocker arm 11 is a seesaw type and is pivotally supported on a rocker shaft 12 mounted so as to penetrate the cylinder head 1. A hydraulic tappet 13 is slidably attached to the tip of one rocker arm 11. The rocker arms 7 and 11 are in contact with an intake cam 15 and an exhaust cam 16 of a camshaft 14 that interlocks with the crankshaft. Hole 9 for inserting the hydraulic tappet 10
Is provided in contact with the side surface of the rocker shaft 12, and the rocker shaft 12 is provided with a concentric oil hole 17, and a lateral hole 18 communicates with the side surface of the hydraulic tappet 10. On the other hand, the horizontal hole 19 provided in the concentric oil hole 17 communicates with the oil hole 20 formed in the other rocker arm 11 and communicates with the hydraulic tappet 13 at the tip.

〔発明の作用〕[Operation of the invention]

カムシャフト14の回転によって吸気カム15は、一方の
ロッカーアーム7をピボット8を支点に揺動させ、吸気
弁5をバネに抗して押下げて開く。排気カム16は、回転
によって、他方のロッカーアーム11をロッカーシャフト
12を中心に揺動させ、排気弁6をバネに抗して押下げて
開く。エンジンのクランクシャフトに連動するオイルポ
ンプが吐出する潤滑オイルの一部は、ロッカーシャフト
12の同芯油孔17から横孔18を通して、油圧タペット10に
油圧を化え、一方のロッカーアーム7を吸気弁5の隙間
を零に保つ。又、同芯油孔17から横孔18と、他方のロッ
カーアーム11の油孔20を通して、油圧タペット13に油圧
を加え、油圧タペット13と排気弁6の隙間を零に保つ。
ロッカーシャフト12の同芯油孔17から横孔18,19を通し
て、油圧タペット10,13に油圧を送ることができ、シリ
ンダーヘッド1に穿設する油孔を少くでき、シリンダー
ヘッドの鋳造及び機械加工を少くできて、製造コストの
低減が図れる。
Due to the rotation of the cam shaft 14, the intake cam 15 swings the one rocker arm 7 about the pivot 8 as a fulcrum, and pushes down the intake valve 5 against the spring to open it. The exhaust cam 16 rotates to move the other rocker arm 11 to the rocker shaft.
Swing about 12 and push down the exhaust valve 6 against the spring to open it. Some of the lubricating oil discharged by the oil pump that works with the engine crankshaft is part of the rocker shaft.
The hydraulic pressure is applied to the hydraulic tappet 10 through the concentric oil holes 17 of the twelve and the lateral holes 18, and the one rocker arm 7 keeps the clearance of the intake valve 5 at zero. Further, hydraulic pressure is applied to the hydraulic tappet 13 through the concentric oil hole 17 and the lateral hole 18 and the oil hole 20 of the other rocker arm 11 to keep the gap between the hydraulic tappet 13 and the exhaust valve 6 at zero.
Hydraulic pressure can be sent to the hydraulic tappets 10 and 13 from the concentric oil holes 17 of the rocker shaft 12 through the lateral holes 18 and 19, and the oil holes drilled in the cylinder head 1 can be reduced, and the cylinder head can be cast and machined. The manufacturing cost can be reduced.

〔発明の効果〕〔The invention's effect〕

以上説明したように、この発明は、一方のロッカーア
ームの基部を油圧タペット上端のピボットに支承し、他
方のロッカーアームをロッカーシャフトに軸支して先端
に油圧タペットを設け、両方のロッカーアームを一本の
カムシャフトで駆動して吸気弁及び排気弁を開閉し、一
方のロッカーアームの油圧タペットをロッカーシャフト
の側面に配置し、ロッカーシャフトの同芯油孔と横孔で
連通させ、他方のロッカーアームの油孔を横孔でロッカ
ーシャフトの同芯油孔に連通して先端の油圧タペットに
給油するようにしたので、ロッカーシャフトの同芯油孔
と横孔を通して油圧タペットに給油でき、シリンダーヘ
ッドに穿設する油孔を少くできて、シリンダーヘッドの
鋳造及び機械加工を少くできて、製造コストの低減が図
れる。又、ロッカーシャフトの側面に一方の油圧タペッ
トを設けることによって、コンパクトなレイアウトが可
能になる。
As described above, according to the present invention, the base of one rocker arm is supported by the pivot at the upper end of the hydraulic tappet, the other rocker arm is pivotally supported by the rocker shaft to provide the hydraulic tappet at the tip, and both rocker arms are provided. The intake valve and the exhaust valve are opened and closed by driving with one cam shaft, the hydraulic tappet of one rocker arm is arranged on the side surface of the rocker shaft, and the concentric oil hole of the rocker shaft communicates with the horizontal hole, and the other Since the oil hole of the rocker arm is communicated with the concentric oil hole of the rocker shaft by the lateral hole to supply oil to the hydraulic tappet at the tip, it is possible to lubricate the hydraulic tappet through the concentric oil hole and lateral hole of the rocker shaft. The number of oil holes formed in the head can be reduced, the casting and machining of the cylinder head can be reduced, and the manufacturing cost can be reduced. Further, by providing one hydraulic tappet on the side surface of the rocker shaft, a compact layout becomes possible.

【図面の簡単な説明】[Brief description of drawings]

図は本発明の一実施例を示し、第1図は縦断面図、第2
図は第1図A−Aの矢視部分断面図である。 5……吸気弁、6……排気弁、7……ロッカーアーム、
8……ピボット、10……油圧タペット、11……ロッカー
アーム、12……ロッカーシャフト、13……油圧タペッ
ト、14……カムシャフト、17……同芯油孔、18……横
孔、19……横孔、20……油孔。
FIG. 1 shows an embodiment of the present invention. FIG. 1 is a longitudinal sectional view,
The drawing is a partial cross-sectional view taken along the arrow in FIG. 5 ... intake valve, 6 ... exhaust valve, 7 ... rocker arm,
8 ... Pivot, 10 ... Hydraulic tappet, 11 ... Rocker arm, 12 ... Rocker shaft, 13 ... Hydraulic tappet, 14 ... Camshaft, 17 ... Concentric oil hole, 18 ... Horizontal hole, 19 …… Horizontal hole, 20 …… Oil hole.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】一方のロッカーアームの基部を油圧タペッ
ト上端のピボットに支承し、他方のロッカーアームをロ
ッカーシャフトに軸支して先端に油圧タペットを設け、
両方のロッカーアームを一本のカムシャフトで駆動して
吸気弁及び排気弁を開閉し、一方のロッカーアームの油
圧タペットをロッカーシャフトの側面に配置し、ロッカ
ーシャフトの同芯油孔と横孔で連通させ、他方のロッカ
ーアームの油孔を横孔でロッカーシャフトの同芯油孔に
連通して先端の油圧タペットに給油するようにしたこと
を特徴とする四サイクルエンジンの油圧タペット給油装
置。
1. A base portion of one rocker arm is supported by a pivot at an upper end of a hydraulic tappet, and the other rocker arm is pivotally supported by a rocker shaft to provide a hydraulic tappet at a tip end thereof.
Both rocker arms are driven by a single camshaft to open and close the intake valve and exhaust valve, the hydraulic tappet of one rocker arm is placed on the side of the rocker shaft, and the concentric oil hole and lateral hole of the rocker shaft are used. A hydraulic tappet refueling device for a four-cycle engine, characterized in that the oil hole of the other rocker arm is communicated with a concentric oil hole of a rocker shaft by a lateral hole to supply oil to a hydraulic tappet at the tip.
JP32989287A 1987-12-28 1987-12-28 Hydraulic tappet lubricator for four-cycle engine Expired - Lifetime JP2565521B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32989287A JP2565521B2 (en) 1987-12-28 1987-12-28 Hydraulic tappet lubricator for four-cycle engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32989287A JP2565521B2 (en) 1987-12-28 1987-12-28 Hydraulic tappet lubricator for four-cycle engine

Publications (2)

Publication Number Publication Date
JPH01177401A JPH01177401A (en) 1989-07-13
JP2565521B2 true JP2565521B2 (en) 1996-12-18

Family

ID=18226419

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32989287A Expired - Lifetime JP2565521B2 (en) 1987-12-28 1987-12-28 Hydraulic tappet lubricator for four-cycle engine

Country Status (1)

Country Link
JP (1) JP2565521B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10302663B4 (en) * 2002-11-28 2013-07-11 Volkswagen Ag Valve train arrangement for an internal combustion engine
KR101047658B1 (en) 2009-07-31 2011-07-07 기아자동차주식회사 Engine brake module
KR101057894B1 (en) 2009-09-22 2011-08-22 기아자동차주식회사 Engine brake device of vehicle

Also Published As

Publication number Publication date
JPH01177401A (en) 1989-07-13

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