JPS61204904U

JPS61204904U -

Info

Publication number: JPS61204904U
Application number: JP8924685U
Authority: JP
Priority date: 1985-06-13
Filing date: 1985-06-13
Publication date: 1986-12-24

Description

[Brief explanation of the drawing]

第１図はこの考案の実施例を示すラツシユ調整
装置の断面図、第２図Ａは一方向弁の取付状態を
示す要部拡大断面図、第２図Ｂは一方向弁の嘴状
部側から見た平面図、第３図は従来例を示すラツ
シユ調整装置の断面図、第４図は従来例を示すラ
ツシユ調整装置の要部断面図である。１……カム、３……タペツト本体、４……導入
室、５……シリンダ孔、６……プランジヤ、７…
…吸気または排気弁、８……隔壁、９……上室、
１０……下室、１１……連通孔、１２……圧縮ば
ね、１５……チエツク弁、２１……導入孔、２１
ａ……内径段付部、２２……一方向弁、２２Ａ…
…大径部、２２ａ……肩部、２２ｂ……後端部、
２３……ストツパ。 Fig. 1 is a sectional view of a lash adjustment device showing an embodiment of this invention, Fig. 2A is an enlarged sectional view of the main part showing the installed state of the one-way valve, and Fig. 2B is the side of the beak of the one-way valve. FIG. 3 is a sectional view of a lash adjusting device according to a conventional example, and FIG. 4 is a sectional view of a main part of a lash adjusting device according to a conventional example. 1...Cam, 3...Tappet body, 4...Introduction chamber, 5...Cylinder hole, 6...Plunger, 7...
... Intake or exhaust valve, 8 ... Bulkhead, 9 ... Upper chamber,
10...Lower chamber, 11...Communication hole, 12...Compression spring, 15...Check valve, 21...Introduction hole, 21
a... Inner diameter stepped part, 22... One-way valve, 22A...
...Large diameter part, 22a...Shoulder part, 22b...Rear end part,
23...Stoppa.

Claims

[Scope of utility model registration request]

An axial cylinder hole that opens into the introduction chamber is formed inside the cylindrical tabbed body, which has an introduction chamber for hydraulic oil at the upper end of the seal that the cam slides into. A plunger is inserted into the plunger and its lower end side is operatively connected to an intake or exhaust valve, and the inside of the plunger is divided into two upper and lower chambers and is provided with a communication hole between the two upper and lower chambers. The partition wall is slidably inserted under the elastic force of a compression spring housed in the lower chamber, and a check valve is fitted to the communication hole of this partition wall to allow passage of hydraulic oil from the upper chamber to the lower chamber. Further, the tappet body is provided with an introduction hole for guiding the hydraulic oil into the introduction chamber, and a lash adjustment device equipped with a rubber one-way valve that allows passage of the hydraulic oil toward the introduction chamber inside the introduction hole. In this method, the inner diameter of the introduction hole is stepped, and the one-way valve is formed with a large diameter portion that fits into the large inner diameter of the introduction hole. What is claimed is: 1. A lash adjustment device for a valve mechanism, characterized in that the device is fixed by being sandwiched in the axial direction between a stopper that is inserted and fixed within the diameter and a stepped portion of the inner diameter of the introduction hole.