JPH0341042Y2 - - Google Patents
Info
- Publication number
- JPH0341042Y2 JPH0341042Y2 JP19589785U JP19589785U JPH0341042Y2 JP H0341042 Y2 JPH0341042 Y2 JP H0341042Y2 JP 19589785 U JP19589785 U JP 19589785U JP 19589785 U JP19589785 U JP 19589785U JP H0341042 Y2 JPH0341042 Y2 JP H0341042Y2
- Authority
- JP
- Japan
- Prior art keywords
- crown
- oil
- wear
- hole
- resistant material
- 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
- 239000000463 material Substances 0.000 claims description 16
- 239000003921 oil Substances 0.000 description 19
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】
本考案は内燃機関の油圧式バルブラツシユアジ
ヤスタ（油圧リフタ）に関する。 従来、この種
の油圧リフタを、気泡濃度の高いエンジン油回路
中で用いると、内部に空気が蓄積し、この空気が
高圧室に入り込むと、剛性が下がり、その分動弁
系のラツシユとして現われ動弁系が異音を発する
問題があつた。これを防ぐ手段としてボデイ冠部
に内部と導通する孔をあけ、内部に蓄積しようと
する空気を速やかに外部へ排出する方法がすでに
知られている。一方、エンジンが高速、高性能化
し、またエンジン油に対してもメインテナンスフ
リー化が求められる今日、特にボデイ冠部の耐摩
耗性が優れていて、同時に軽量の油圧リフタが求
められている。ボデイ全体を耐摩耗強度の優れる
特殊材で形成することは高価になりがちであり、
また加工方法により形状に制約があつたり、脆性
強度確保の問題があつたりして、重量増になりが
ちである。この問題を解決する比較的安価な方法
として冠部に耐摩耗性のある鋼、高合金、焼結金
属、セラミツクスなどを例えばろう付や液層焼結
などの方法で結合することが考えられる。しか
し、冠部に孔がある場合孔の周囲に応力が集中し
破壊の起点となるので、必要な冠部強度を確保す
るために冠部接合部材および母材は厚手になり、
重量がかさんでしまう欠点がある。[Detailed Description of the Invention] The present invention relates to a hydraulic valve latch adjuster (hydraulic lifter) for an internal combustion engine. Conventionally, when this type of hydraulic lifter is used in an engine oil circuit with a high bubble concentration, air accumulates inside, and when this air enters the high pressure chamber, the rigidity decreases and appears as lash in the branch valve system. There was a problem with the valve train making abnormal noises. As a means to prevent this, a method is already known in which a hole is formed in the crown of the body to communicate with the interior, and air that tends to accumulate inside the vehicle is quickly discharged to the outside. On the other hand, today's engines are becoming faster and more efficient, and maintenance-free engine oil is required, so there is a demand for hydraulic lifters that are lightweight and have excellent wear resistance, especially in the body crown. Forming the entire body from a special material with excellent wear resistance tends to be expensive.
In addition, the processing method imposes restrictions on the shape, and there are problems with securing brittle strength, which tends to increase weight. A relatively inexpensive method to solve this problem may be to bond wear-resistant steel, high alloy, sintered metal, ceramics, or the like to the crown by, for example, brazing or liquid layer sintering. However, if there is a hole in the crown, stress will concentrate around the hole and become a starting point for fracture, so in order to ensure the necessary strength of the crown, the crown joint member and base material must be thick.
It has the disadvantage of being heavy.
本考案はこの様な問題に対してなされたもので
あり応力集中のしやすい孔の周囲を冠部接合部材
あるいは母材のうちどちらか抗折力の強い材料で
囲むことにより比較的安価で軽量な耐摩耗強度お
よび機械的強度の優れた油圧リフタを提供するも
のである。 The present invention was developed in response to this problem, and is relatively inexpensive and lightweight by surrounding the hole where stress is likely to be concentrated with either the crown joint member or the base material, whichever has a stronger transverse rupture strength. The present invention provides a hydraulic lifter with excellent wear resistance and mechanical strength.
今、本考案の油圧式バルブラツシユアジヤスタ
の実施例を添付図面を参照して説明する。 An embodiment of the hydraulic valve lash adjuster of the present invention will now be described with reference to the accompanying drawings.
シリンダヘツド１に嵌入されたシリンダボデイ
５はカム２に接し、かつシリンダボデイ５と一体
の内ぶた６および該内ぶた６と一体のシリンダ内
筒７を備えている。シリンダ内筒７にはアウタプ
ランジャが摺動自在に嵌入されており、該アウタ
プランジャ９には更にインナプランジャ１０が嵌
入されている。アウタプランジャ９にはＯリング
８が設けてある。シリンダボデイ５内の油導入室
１７は、シリンダボデイ５に形成された油供給リ
セス１５および油供給孔１６を介してシリンダヘ
ツドの油回路４と連通している。 A cylinder body 5 fitted into the cylinder head 1 is in contact with the cam 2 and is provided with an inner lid 6 that is integral with the cylinder body 5 and an inner cylinder tube 7 that is integral with the inner lid 6. An outer plunger is slidably fitted into the cylinder inner tube 7, and an inner plunger 10 is further fitted into the outer plunger 9. An O-ring 8 is provided on the outer plunger 9. The oil introduction chamber 17 in the cylinder body 5 communicates with the oil circuit 4 of the cylinder head via an oil supply recess 15 and an oil supply hole 16 formed in the cylinder body 5.
インナプランジャ１０の内部に形成されたリザ
ーバ室１８はシリンダボデイ５の頂壁に設けた油
供給口１９を介して油導入室１７と連通し、又チ
エツク弁１４を介してアウタプランジャ９とイン
ナプランジャ１０との間に形成された高圧室２５
と連通している。高圧室２５内においてアウタプ
ランジャ９とインナプランジャ１０との間にはリ
ターンスプリング１３が設けられている。 A reservoir chamber 18 formed inside the inner plunger 10 communicates with an oil introduction chamber 17 via an oil supply port 19 provided on the top wall of the cylinder body 5, and communicates with an oil introduction chamber 17 via a check valve 14 between the outer plunger 9 and the inner plunger. A high pressure chamber 25 formed between
It communicates with A return spring 13 is provided between the outer plunger 9 and the inner plunger 10 in the high pressure chamber 25 .
ボデイ５の冠部にはリザーバ室１８と外部とを
連通する排出口２０があけられている。また冠部
の表面には耐摩耗材２１が排出口２０を除いて結
合されている。この例の場合はボデイ５よりも耐
摩耗材２１の方が抗折力は劣つているので孔２０
の周囲は母材で囲まれている。母材の抗折力が劣
つている場合は第２図に示す様に孔２０の周囲は
耐摩耗材２１で囲まれることになる。 A discharge port 20 is provided in the crown of the body 5 to communicate the reservoir chamber 18 with the outside. Further, a wear-resistant material 21 is bonded to the surface of the crown except for the outlet 20. In this example, the wear-resistant material 21 has a lower transverse rupture strength than the body 5, so the hole 21
is surrounded by the base material. If the transverse rupture strength of the base material is poor, the periphery of the hole 20 will be surrounded by a wear-resistant material 21 as shown in FIG.
油圧式バルブラツシユアジヤスタは次のように
作動する。カム２の動きに従つて内燃機関のバル
ブ３が開かれると、アウタプランジャ９の下側に
設けられたバルブスプリング（図示せず）の荷重
がアウタプランジャ９に伝えられ高圧室２５に高
圧が発生する。この高圧室２５の油の１部はイン
ナプランジャ１０とアウタプランジャ９との間の
すき間より漏れ出し、その分アウタプランジャ９
はインナプランジャ１０に対してわずかに変位
（図面で上向きに変位）する。 The hydraulic valve lash adjuster operates as follows. When the valve 3 of the internal combustion engine is opened according to the movement of the cam 2, the load of a valve spring (not shown) provided below the outer plunger 9 is transmitted to the outer plunger 9, and high pressure is generated in the high pressure chamber 25. do. A part of the oil in this high pressure chamber 25 leaks out from the gap between the inner plunger 10 and the outer plunger 9, and the amount of oil leaks out from the outer plunger 9.
is slightly displaced (displaced upward in the drawing) with respect to the inner plunger 10.
次にバルブ３が閉じるとリターンスプリング１
３の働きによりアウタプランジャ９に復元力が加
わつて変位（図面で下向きに変位）し、高圧室２
５がリザーバ室１８よりも低い圧力になるとチエ
ツク弁１４が開いてリザーバ室１８より高圧室２
５へ油が流れ込み、リザーバ室１８へは油供給口
１９を通つて油導入室１７から油が補給され、更
に油導入室１７へは油供給孔１６を通つてシリン
ダヘツドの油回路４から油が供給される。 Next, when valve 3 closes, return spring 1
3, a restoring force is applied to the outer plunger 9 and it is displaced (displaced downward in the drawing), and the high pressure chamber 2
5 becomes lower pressure than the reservoir chamber 18, the check valve 14 opens and the pressure in the high pressure chamber 2 is lower than that in the reservoir chamber 18.
5, oil is supplied to the reservoir chamber 18 from the oil introduction chamber 17 through the oil supply port 19, and oil is further supplied to the oil introduction chamber 17 from the oil circuit 4 of the cylinder head through the oil supply hole 16. is supplied.
リザーバ室１８へ流れ込んだ油の一部は小孔２
０から外部へ流出する。この時蓄積しそうになる
油中気泡は一緒に小孔２０から排出されるので高
圧室２５は蓄積された多量の空気を吸い込まなく
なる。 Some of the oil that has flowed into the reservoir chamber 18 is
0 flows out to the outside. At this time, the air bubbles in the oil that are likely to accumulate are discharged together from the small hole 20, so that the high pressure chamber 25 no longer sucks in a large amount of accumulated air.
カムは常に冠部表面上を摺動するのでこの部位
の摩耗環境は厳しい。特に高速回転による面圧の
増加や劣化油環境になると顕著になる。本考案で
はこの部分に耐摩耗材２１を接合し、同時に機械
的強度も保つために小孔２０の周囲をどちらか抗
折力の強い側の部材でおおつているので、かかる
摩耗問題を解決することができる。 Since the cam constantly slides on the crown surface, the wear environment in this area is severe. This becomes especially noticeable when the surface pressure increases due to high-speed rotation or when the environment is in a degraded oil environment. In the present invention, the wear-resistant material 21 is bonded to this part, and at the same time, in order to maintain mechanical strength, the periphery of the small hole 20 is covered with a member having a stronger transverse rupture strength, so this problem of wear can be solved. I can do it.
第１図は耐摩耗材より母材の方が抗折力が大き
い場合の実施例を示す油圧式バルブラツシユアジ
ヤスタの断面図、第２図は母材の方が小さい場合
の実施例を示すバルブラツシユアジヤスタの冠部
の断面図である。
５……ボデイ、２０……孔、２１……耐摩耗性
材料。
Figure 1 is a cross-sectional view of a hydraulic valve lash adjuster showing an example in which the base material has a larger transverse rupture force than the wear-resistant material, and Figure 2 shows an example in which the base material has a smaller transverse rupture force. FIG. 3 is a sectional view of the crown portion of the valve brush adjuster. 5... Body, 20... Hole, 21... Wear-resistant material.
Claims (1)
け、該冠部の表面に耐摩耗性を有する材料を接合
した油圧式バルブラツシユアジヤスタにおいて、
前記ボデイの冠面部にあけた孔の周囲を母材ある
いは耐摩耗性材のうちどちらか抗折力の強い材料
でとり囲んだことを特徴とする油圧式バルブラツ
シユアジヤスタ。 In a hydraulic valve brush adjuster in which a hole communicating with the outside of the device is formed in the upper end crown of the body and a wear-resistant material is bonded to the surface of the crown,
A hydraulic valve lash adjuster characterized in that a hole made in the crown surface of the body is surrounded by a base material or a wear-resistant material, whichever has a stronger transverse rupture strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19589785U JPH0341042Y2 (en) | 1985-12-19 | 1985-12-19 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19589785U JPH0341042Y2 (en) | 1985-12-19 | 1985-12-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62102804U JPS62102804U (en) | 1987-06-30 |
| JPH0341042Y2 true JPH0341042Y2 (en) | 1991-08-29 |
Family
ID=31154208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19589785U Expired JPH0341042Y2 (en) | 1985-12-19 | 1985-12-19 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0341042Y2 (en) |
-
1985
- 1985-12-19 JP JP19589785U patent/JPH0341042Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62102804U (en) | 1987-06-30 |
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