JPH072965Y2 - Tapestry for internal combustion engine - Google Patents
Tapestry for internal combustion engineInfo
- Publication number
- JPH072965Y2 JPH072965Y2 JP1988099366U JP9936688U JPH072965Y2 JP H072965 Y2 JPH072965 Y2 JP H072965Y2 JP 1988099366 U JP1988099366 U JP 1988099366U JP 9936688 U JP9936688 U JP 9936688U JP H072965 Y2 JPH072965 Y2 JP H072965Y2
- Authority
- JP
- Japan
- Prior art keywords
- tapette
- oil return
- internal combustion
- combustion engine
- end side
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 238000005242 forging Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 20
- 239000000463 material Substances 0.000 description 4
- 238000010273 cold forging Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Description
【考案の詳細な説明】 産業上の利用分野 本考案は、内燃機関用タペツトに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a tapette for an internal combustion engine.
従来の技術 従来、内燃機関用タペツトの構造としては第３図に示す
ものが一般的である。まず、タペツト１はタペツトガイ
ド２内を上下方向摺動自在に設けられている。このタペ
ツト１は、断面形状が略Ｕ字形のタペツト底部３と、タ
ペツト底部３の開放端側周縁部に溶接により結合された
円筒状の筒状部４とから構成されている。前記タペツト
底部３の閉塞端側外周面には動弁カム５が当接する摺動
面６が形成されており、さらに、前記タペツト底部３の
閉塞端側内周面にはプツシユロツド７の先端部が転動自
在に当接する凹部８が形成されている。ここで、前記タ
ペツト底部３は、耐摩耗性に優れた高価な材料で形成さ
れており、一方、前記筒状部４は、軽量で安価な材料に
より形成される。2. Description of the Related Art Conventionally, the structure of a tapette for an internal combustion engine is generally shown in FIG. First, the tapette 1 is provided so as to be vertically slidable in the tapette guide 2. The tapette 1 is composed of a tapette bottom portion 3 having a substantially U-shaped cross section, and a cylindrical tubular portion 4 joined to the peripheral edge portion of the tapette bottom portion 3 on the open end side by welding. A sliding surface 6 on which the valve cam 5 abuts is formed on the outer peripheral surface of the tape bottom 3 on the closed end side, and the tip of the push rod 7 is formed on the inner peripheral surface of the tape bottom 3 on the closed end side. A recessed portion 8 is formed so as to be rollably abutted. Here, the tape bottom portion 3 is formed of an expensive material having excellent wear resistance, while the tubular portion 4 is formed of a lightweight and inexpensive material.
つぎに、前記筒状部４には複数個のオイル戻し穴９が形
成されており、ロツカーアーム等の動弁機構（図示せ
ず）を潤滑して前記タペツトガイド２内に落下したエン
ジンオイル（矢印ａ）は前記タペツト底部３内に溜ま
り、前記プツシユロツド７と前記凹部８との当接部を潤
滑した後に前記オイル戻し穴９からオーバフローしてオ
イルタンク（図示せず）内に戻る。Next, a plurality of oil return holes 9 are formed in the cylindrical portion 4 to lubricate a valve operating mechanism (not shown) such as a rocker arm and drop engine oil (arrow a). ) Collects in the tape bottom 3 and lubricates the contact portion between the push rod 7 and the recess 8 and then overflows from the oil return hole 9 and returns to the oil tank (not shown).
考案が解決しようとする問題点 オイル戻し穴９は機械加工により形成しているため、手
間がかかつている。また、オイル戻し穴９の形成時に筒
状部４の内部にカエリが発生し、このカエリを取除くカ
エリ取り作業に手間がかかつている。Problems to be solved by the invention Since the oil return hole 9 is formed by machining, it is troublesome. Further, burrs are generated inside the tubular portion 4 when the oil return hole 9 is formed, and it takes time and effort to remove the burrs.
問題点を解決するための手段 動弁カムが当接する摺動面を有する断面形状略Ｕ字形の
タペツト底部とこのタペツト底部の開放端側に結合され
る円筒状の円筒部とからなる内燃機関用タペツトにおい
て、前記タペツト底部を鍛造により形成するとともにこ
のタペツト底部の前記筒状部の端部が当接する開放端側
周縁部にこの開放端側周縁部側を開放させてオイル戻し
穴を鍛造時に同時に形成した。Means for Solving the Problems For an internal combustion engine comprising a tapette bottom having a substantially U-shaped cross section having a sliding surface with which a valve cam comes into contact, and a cylindrical cylindrical portion connected to the open end side of the tape bottom. In the tapet, the bottom part of the tapet is formed by forging, and at the same time when the oil return hole is forged, the end part of the tubular part of the bottom part of the tapet is opened to the peripheral part of the open end side to open the peripheral part of the open end side. Formed.
作用 従つて、オイル戻し穴を別個に加工する手間が不要とな
り、さらに、オイル戻し穴を形成する際にオイル戻し穴
の周縁部にカエリが生ずることがないためにカエリ取り
作業が不要となる。Therefore, the labor for separately processing the oil return hole is unnecessary, and further, since the burrs do not occur at the peripheral portion of the oil return hole when forming the oil return hole, the burring work is unnecessary.
実施例 本考案の一実施例を第１図及び第２図に基づいて説明す
る。なお、第３図において説明した部分と同一部分は同
一符号で示し、説明も省略する。まず、タペツト10がタ
ペツトガイド２内に上下方向摺動自在に設けられてい
る。このタペツト10は、断面形状が略Ｕ字形のタペツト
底部11と円筒状の筒状部12とから構成され、タペツト底
部11の開放端側周縁部と筒状部12の一端とが溶接されて
いる。前記タペツト底部11の閉塞端側外周面には動弁カ
ム５が当接する摺動面６が形成されている、さらに、前
記タペツト底部11の閉塞端側外周面にはプツシユロツド
７の先端部が転動自在に当接する凹部８が形成されてい
る。ここで、前記タペツト底部11は、耐摩耗性に優れた
高価な材料で形成されており、一方、前記筒状部12は、
軽量で安価な材料により形成されている。Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2. The same parts as those described in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted. First, a tapet 10 is provided in the tapet guide 2 so as to be vertically slidable. The tapette 10 is composed of a tapette bottom portion 11 having a substantially U-shaped cross section and a cylindrical tubular portion 12. The peripheral edge portion of the tapette bottom portion 11 on the open end side and one end of the tubular portion 12 are welded to each other. . A sliding surface 6 against which the valve cam 5 abuts is formed on the outer peripheral surface of the tape bottom 11 on the closed end side. Further, the tip end of the push rod 7 rolls on the outer peripheral surface of the tape bottom 11 on the closed end side. A concave portion 8 is formed so as to movably abut. Here, the tapette bottom portion 11 is formed of an expensive material having excellent wear resistance, while the tubular portion 12 is
It is made of lightweight and inexpensive material.
つぎに、前記タペツト底部11は冷間鍛造により形成され
ている。さらに、前記タペツト底部11の開放端側周縁部
には半球状のオイル戻し穴13が複数個形成されており、
これらのオイル戻し穴13は前記タペツト底部11の冷間鍛
造時に同時に形成されている。Next, the tape bottom 11 is formed by cold forging. Further, a plurality of hemispherical oil return holes 13 are formed in the peripheral edge portion on the open end side of the tape bottom portion 11,
These oil return holes 13 are formed at the same time when the tape bottom 11 is cold forged.
このような構成において、動弁カム５の回転によりタペ
ツト10がタペットガイド２内を上下方向に摺動し、プツ
シユロツド７が一体的に摺動することにより動弁機構が
駆動され、吸気弁及び排気弁の開閉が行われる。動弁機
構を潤滑したエンジンオイルはタペツトガイド２内を落
下し、タペツト底部３内に溜まつてプツシユロツド７と
凹部８との当接部を潤滑した後にオイル戻し穴13からオ
ーバフローしてオイルタンク内に戻る。In such a configuration, the rotation of the valve operating cam 5 causes the tapet 10 to slide in the tappet guide 2 in the vertical direction, and the push rod 7 slides integrally to drive the valve operating mechanism, thereby introducing the intake valve and the exhaust valve. The valve is opened and closed. The engine oil that lubricated the valve operating mechanism falls inside the tape guide 2 and accumulates in the bottom 3 of the tape to lubricate the contact portion between the push rod 7 and the recess 8 and then overflows from the oil return hole 13 into the oil tank. Return.
ここで、オイル戻し穴13がタペツト底部11の冷間鍛造時
に同時に形成されるため、オイル戻し穴13を別個に穴加
工する手間が省け、しかも、オイル戻し穴13の周縁部に
カエリが生ずることがなく、カエリ取り作業が不要とな
る。Here, since the oil return hole 13 is formed at the same time as the cold forging of the tapette bottom 11, it is possible to save the labor of separately drilling the oil return hole 13, and further, the peripheral edge of the oil return hole 13 is burred. There is no need to remove the burrs.
考案の効果 本考案は、上述のようにタペツト底部を鍛造により形成
する際に同時にオイル戻し穴を形成したことにより、別
個にオイル戻し穴を穴加工するという手間を省くことが
でき、しかも、オイル戻し穴はタペツト底部開放端側周
縁部側を開放させて形成されているため、オイル戻し穴
の周縁部にはカエリを生じないためにカエリ取り作業が
不要となり、従つて、生産コストの大幅な低減を図るこ
とができる等の効果を有する。Effect of the Invention According to the present invention, since the oil return hole is formed at the same time when the tapette bottom is formed by forging as described above, it is possible to save the labor of separately drilling the oil return hole. Since the return hole is formed by opening the peripheral part of the tapette bottom open end side, no burrs are formed on the peripheral part of the oil return hole, and therefore burring work is not required, resulting in a large production cost. It has an effect that it can be reduced.
第１図は本考案の一実施例を示す縦断正面図、第２図は
タペツト底部を示す斜視図、第３図は従来例を示す縦断
正面図である。 ５…動弁カム、６…摺動面、11…タペツト底部、12…筒
状部、13…オイル戻し穴FIG. 1 is a vertical sectional front view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a bottom of a tapette, and FIG. 3 is a vertical sectional front view showing a conventional example. 5 ... Valve cam, 6 ... Sliding surface, 11 ... Tapes bottom, 12 ... Cylindrical part, 13 ... Oil return hole
Claims (1)
状略Ｕ字形のタペツト底部とこのタペツト底部の開放端
側に結合される円筒状の筒状部とからなる内燃機関用タ
ペツトにおいて、前記タペツト底部を鍛造により形成す
るとともにこのタペツト底部の前記筒状部の端部が当接
する開放端側周縁部にこの開放端側周縁部側を開放させ
てオイル戻し穴を鍛造時に同時に形成したことを特徴と
する内燃機関用タペツト。1. A tapette for an internal combustion engine, comprising a tapette bottom having a substantially U-shaped cross section having a sliding surface with which a valve cam comes into contact, and a cylindrical tubular portion connected to the open end of the tapette bottom. , The bottom portion of the tapette is formed by forging, and the oil return hole is formed at the time of forging by opening the peripheral edge portion of the open end side to the peripheral edge portion of the open end side with which the end portion of the tubular portion of the tapet bottom abuts A tapet for an internal combustion engine, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988099366U JPH072965Y2 (en) | 1988-07-27 | 1988-07-27 | Tapestry for internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988099366U JPH072965Y2 (en) | 1988-07-27 | 1988-07-27 | Tapestry for internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0220703U JPH0220703U (en) | 1990-02-13 |
| JPH072965Y2 true JPH072965Y2 (en) | 1995-01-30 |
Family
ID=31326459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988099366U Expired - Lifetime JPH072965Y2 (en) | 1988-07-27 | 1988-07-27 | Tapestry for internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH072965Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1081291C (en) * | 1995-06-26 | 2002-03-20 | 住友电气工业株式会社 | ceramic sliding parts |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58173707U (en) * | 1982-05-17 | 1983-11-19 | トヨタ自動車株式会社 | valve lifter |
| JPS6245308U (en) * | 1985-09-06 | 1987-03-19 |
-
1988
- 1988-07-27 JP JP1988099366U patent/JPH072965Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0220703U (en) | 1990-02-13 |
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