JPS6224722Y2 - - Google Patents
Info
- Publication number
- JPS6224722Y2 JPS6224722Y2 JP8972782U JP8972782U JPS6224722Y2 JP S6224722 Y2 JPS6224722 Y2 JP S6224722Y2 JP 8972782 U JP8972782 U JP 8972782U JP 8972782 U JP8972782 U JP 8972782U JP S6224722 Y2 JPS6224722 Y2 JP S6224722Y2
- Authority
- JP
- Japan
- Prior art keywords
- coating layer
- tappet
- groove
- pressure surface
- chromium oxide
- 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
- 239000011247 coating layer Substances 0.000 claims description 9
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 4
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 3
- 238000005524 ceramic coating Methods 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910000423 chromium oxide Inorganic materials 0.000 claims description 3
- 238000000151 deposition Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 3
- 206010008531 Chills Diseases 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001845 chromium compounds Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
- Chemically Coating (AREA)
Description
【考案の詳細な説明】
本考案は内燃機関における吸気弁及び排気弁の
動弁機構用タペツトの構造の改良に関するもので
ある。従来のタペツトは第４図に図示するよう
に、タペツト本体１１を、例えば炭素鋼材等を使
用して係合溝１４、摺擦面１２及係圧面１３にク
ローム鍍金膜１５等により硬化面を設けるよう構
成するか、或いは鋳鉄材を使用してチル処理によ
り硬化面を構成するかしていた。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the structure of a tappet for a valve mechanism of an intake valve and an exhaust valve in an internal combustion engine. As shown in FIG. 4, a conventional tappet has a tappet main body 11 made of, for example, carbon steel, and hardened surfaces such as a chrome plating film 15 are provided on the engagement groove 14, sliding surface 12, and pressure surface 13. Alternatively, a cast iron material was used and the hardened surface was constructed by chill treatment.
しかしながら、鍍金膜１５或いはチル処理等と
による構造により、何ずれも研削仕上後の前記硬
化面にしばしばピンホール及びヘアークラツクが
存在することとなり、又概して製作工程を複雑と
する等の問題を有するものであつた。 However, due to the structure of the plating film 15 or chill treatment, pinholes and hair cracks often exist on the hardened surface after grinding, and the manufacturing process is generally complicated. It was hot.
本考案の目的は上記した問題を効果的に解決し
た動弁機構用タペツトを提供することで、ピンホ
ール及びヘアークラツクの全くみない、且つ極め
て簡易な処理により、しかも充分な硬度による優
れた耐摩耗性、鉄鋼肌表面への結合力、被覆層自
体の靭性と緻密性、更に摩耗係数の極めて小なる
等の特性を有した硬化面を設けたもので、以下本
考案の実施例を第１図乃至第３図について詳述す
れば、タペツト本体１は軸芯の上端部若くは内側
底部にプツシユロツドとの当接係合溝４を有し、
且つ外側周面をシリンダーブロツク側の組込み孔
周壁との摺擦面２とし、更に外側底面をカムとの
係圧面３とした鉄鋼材による有底円筒体或いは円
柱体からなるもので、本考案では更にタペツト本
体１の前記係合溝４、摺擦面２及び係圧面３の少
なくとも一表面に、酸化クロームによつて化学結
合されたSiO2，Cr2O3及びAl2O3からなる組成を
有するセラミツクの被覆層５を被着したものであ
る。 The purpose of the present invention is to provide a tappet for a valve train mechanism that effectively solves the above-mentioned problems.It has no pinholes or hair cracks, is extremely simple to process, and has excellent wear resistance due to sufficient hardness. The hardened surface has properties such as hardness, bonding strength to the steel skin surface, toughness and density of the coating layer itself, and extremely low coefficient of wear. In detail with reference to FIGS. 3 to 3, the tappet body 1 has a groove 4 for abutting with the push rod at the upper end of the shaft core or at the inner bottom.
In addition, it is made of a bottomed cylindrical body or cylindrical body made of steel whose outer peripheral surface is a sliding surface 2 that contacts the peripheral wall of the installation hole on the cylinder block side, and whose outer bottom surface is a pressure surface 3 that engages with the cam. Furthermore, a composition consisting of SiO 2 , Cr 2 O 3 and Al 2 O 3 chemically bonded by chromium oxide is applied to at least one surface of the engagement groove 4, the sliding surface 2 and the pressure surface 3 of the tappet body 1. A coating layer 5 of ceramic having the following properties is applied.
この被覆層５の被着に際しては、可溶性クロー
ム化合物の濃水溶液（例えばH2CrO4）に珪石
（SiO2）、酸化クローム（Cr2O3）及び溶融アルミ
ナ（α−Al2O3）等からなる微粉末を添加し、更
に少量のカオリン或いは粘土を加えて充分に撹拌
混合した懸濁液中に前記タペツト本体１を浸漬す
るか、或いは刷毛塗布するか、又はスプレー等に
より塗着せしめ、次いで一時乾燥した後にこの塗
着部を320℃以上に加熱処理を施すことによつ
て、微粒子相互及び鉄鋼肌表面に介在するクロー
ム酸化物が各組成物と化学結合して硬化した前記
特性を有するセラミツクの被覆層５を構成してな
るものである。 When depositing this coating layer 5, silica stone (SiO 2 ), chromium oxide (Cr 2 O 3 ), fused alumina (α-Al 2 O 3 ), etc. are added to a concentrated aqueous solution of a soluble chromium compound (for example, H 2 CrO 4 ). The tapepet body 1 is immersed in a suspension in which a fine powder consisting of is added, a small amount of kaolin or clay is added, and the suspension is thoroughly stirred and mixed, or the tapepet body 1 is applied by applying with a brush, or by spraying, etc. Then, after temporarily drying, the coated area is heat-treated at 320°C or higher, whereby the chromium oxide present in the fine particles and on the surface of the steel chemically bonds with each composition to obtain the above-mentioned properties. It is made up of a ceramic coating layer 5.
なお、被覆層５の組成比は、好ましくは、
SiO2が15％乃至25％、Cr2O3が30％乃至50％、
Al2O3が35％乃至45％の範囲に、又層厚を約
0.02m／ｍ乃至0.7m／ｍの範囲とすることが望ま
しいところである。 The composition ratio of the coating layer 5 is preferably as follows:
SiO 2 15% to 25%, Cr 2 O 3 30% to 50%,
Al 2 O 3 is in the range of 35% to 45%, and the layer thickness is approximately
A range of 0.02 m/m to 0.7 m/m is desirable.
以上の通り、本考案によれば、単に前記懸濁液
への浸漬或いは塗着と、その後の低温度での加熱
処理とによつて硬化面を極めて簡易に構成し得る
こととなり、併せCr2O3の使用により特に他のセ
ラミツク材に比して鉄鋼肌表面への結合力、被覆
層自体の靭性及び浸漬或いは塗着に関連してなす
緻密性等の優れた状態をもつて被覆層５を構成す
ることができるものである。 As described above, according to the present invention, it is possible to form a hardened surface extremely simply by simply dipping or coating in the suspension and subsequent heat treatment at a low temperature . By using O3 , the coating layer 5 has excellent bonding strength to the surface of the steel surface, toughness of the coating layer itself, and denseness when immersed or painted, compared to other ceramic materials. can be configured.
第１図は本考案の一実施例に係る動弁機構用タ
ペツトの平面図、第２図は第１図のＡ−Ａ線上の
断面図、第３図は他の実施例の同上第２図相当
図、第４図は従来例を示す一部切欠き断面図であ
る。
２……摺擦面、３……係圧面、４……係合溝、
５……セラミツクの被覆層。
Fig. 1 is a plan view of a valve mechanism tappet according to an embodiment of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, and Fig. 3 is the same as Fig. 2 of another embodiment. The corresponding diagram, FIG. 4, is a partially cutaway sectional view showing a conventional example. 2...Sliding surface, 3...Pressure surface, 4...Engagement groove,
5... Ceramic coating layer.
Claims (1)
との当接係合溝を有し、且つ外側周面をシリンダ
ーブロツク側の組込み孔周壁との摺擦周面とし、
更に外側底面をカムとの係圧面とした有底円筒体
或いは円柱体からなるタペツト本体構造におい
て、前記係合溝４、摺擦面２及び係圧面３の少な
くとも一表面に、酸化クロームによつて化学結合
されたSiO2，Cr2O3及びAl2O3からなる組成を有
するセラミツクの被覆層５を被着して構成してな
ることを特徴とする動弁機構用タペツト。 The upper end or the inner bottom of the shaft core has a groove for abutting with the push rod, and the outer circumferential surface is a circumferential surface that slides against the circumferential wall of the installation hole on the cylinder block side;
Further, in the tapepet main body structure consisting of a bottomed cylinder or columnar body whose outer bottom surface is a pressure surface for contact with the cam, at least one surface of the engagement groove 4, the sliding surface 2, and the pressure surface 3 is coated with chromium oxide. 1. A tappet for a valve train, characterized in that it is constructed by depositing a ceramic coating layer 5 having a composition of chemically bonded SiO 2 , Cr 2 O 3 and Al 2 O 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8972782U JPS58191309U (en) | 1982-06-16 | 1982-06-16 | Tappet for valve train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8972782U JPS58191309U (en) | 1982-06-16 | 1982-06-16 | Tappet for valve train |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58191309U JPS58191309U (en) | 1983-12-19 |
| JPS6224722Y2 true JPS6224722Y2 (en) | 1987-06-24 |
Family
ID=30098318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8972782U Granted JPS58191309U (en) | 1982-06-16 | 1982-06-16 | Tappet for valve train |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58191309U (en) |
-
1982
- 1982-06-16 JP JP8972782U patent/JPS58191309U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58191309U (en) | 1983-12-19 |
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