JPS59175612U

JPS59175612U - Direct-acting valve mechanism

Info

Publication number: JPS59175612U
Application number: JP7002183U
Authority: JP
Inventors: 誠次鶴田
Original assignee: 厚木自動車部品株式会社
Priority date: 1983-05-11
Filing date: 1983-05-11
Publication date: 1984-11-24

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来の直動型動弁機構を示す縦断面図、第２図
は本考案に係る直動型動弁機構の一実施例を示す要部断
面図、第３図は本考案の他の実施例を示す要部拡大断面
図である。１・・・・・・カム、２・・・・・・タペット本体、３
・・・・・・吸気または排気の各ポート、４・・・・・
・吸気または排気バルブ、５・・・・・・シリンダヘッ
ド部、６・・・・・・タペットガイド孔、７・・・・・
・ガイド部、９・・・・・・タペット頭部、１１・・・
・・・シリンダ孔、１２−−−−−−プランジャ、１２
ａ・・・・・・底部、１３・・・・・・チェックバルブ
シート、１４・・・・・・通孔、１５・・・・・・第１
油室、１６・・・・・・第２油室、１７・・・・・・チ
ェックバルブ、１９・・・・・・バルブステム、２３・
・・・・・導入通路、２３ａ・・・・・・環状油室側開
口部、２６・・・・・・環状油室、３３・・・・・・切
欠油路、３４．３４Ａ・・・・・・筒状部材。Fig. 1 is a longitudinal sectional view showing a conventional direct acting valve mechanism, Fig. 2 is a sectional view of essential parts showing an embodiment of the direct acting valve mechanism according to the present invention, and Fig. 3 is a longitudinal sectional view showing a conventional direct acting valve mechanism. FIG. 7 is an enlarged sectional view of a main part showing another embodiment. 1...Cam, 2...Tappet body, 3
...Intake or exhaust ports, 4...
・Intake or exhaust valve, 5...Cylinder head, 6...Tappet guide hole, 7...
・Guide part, 9... Tappet head, 11...
...Cylinder hole, 12---Plunger, 12
a... Bottom, 13... Check valve seat, 14... Through hole, 15... First
Oil chamber, 16...Second oil chamber, 17...Check valve, 19...Valve stem, 23...
...Introduction passage, 23a...Annular oil chamber side opening, 26...Annular oil chamber, 33...Notch oil passage, 34.34A... ...Cylindrical member.

Claims

[Scope of utility model registration request]

The tappet head slides on a cam that rotates at the top of the internal combustion engine, and the tappet body has a guide portion movably disposed in a tappet guide hole formed in the cylinder head, and an axial direction inside the tappet body. A bottomed cylindrical plunger is slidably inserted into the cylinder hole of the cylinder hole, and the plunger is slidably inserted into the inside of the plunger with a predetermined clearance, and the inside of the plunger is inserted into the tappet head side. A check valve seat that is divided into two chambers, a first oil chamber and a second oil chamber on the bottom side of the plunger, and is provided with a through hole that communicates between the first and second oil chambers, and the through hole. a check valve that only allows flow of hydraulic oil from the first oil chamber to the second oil chamber through the check valve; one end of which is still in axial contact with the bottom of the plunger; An intake or exhaust valve communicates with a valve stem for opening and closing an intake or exhaust boat of an internal combustion engine, a hydraulic oil introduction passage formed inside the tappet body and penetrating the tappet body from inside to outside, and the first oil chamber. Rotation of a cam that slides into contact with the tappet head using hydraulic oil supplied from the annular oil chamber into the second oil chamber via the first oil chamber as a medium. In a direct-acting valve mechanism that opens and closes an intake or exhaust valve in response to A direct-acting valve mechanism characterized by being fixed to the .