JPS59184305U

JPS59184305U - Zero lash adjustment device for intake and exhaust valves

Info

Publication number: JPS59184305U
Application number: JP8006983U
Authority: JP
Inventors: 誠次鶴田
Original assignee: 厚木自動車部品株式会社
Priority date: 1983-05-27
Filing date: 1983-05-27
Publication date: 1984-12-07

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 drawings]

第１図は従来のゼロラッシュ調整装置を含むロッカアー
ム付近の一部切断正面図、第２図は第１図のゼロラッシ
ュ調整装置の拡大図、第３図は本考案のゼロラッシュ調
整装置の第１実施例の断面図、第４図は第３図のｍＶ−
ＩＶ線断面図、第５図は本考案の第２実施例の断面図、
第６図は第５図のＶＩ−ＶＩ線断面図、第７図は本考案
の第３実施例の断面図、第８図は第７図の■−■線断面
図である。、４・・・・・・吸、排気バルブ、５・・・・・・バル
ブ駆動カム、７・・・・・・ゼロラッシュ調整装置、８
・・曲ボディ、９・・・・・・第１の油室、９ａ・・・
・・・第１リザーバ室、９ｂ・・・・・・第２リザーバ
室、１０・・曲プランジャ、１１・・・・・・第２の油
室、１２・・曲リターンスプリング、１５・・・・・・
チェックバルブ、１６・・・・・・弁孔、１９・・・・
・・油路、２１・・・・・・チェックバルブ。Fig. 1 is a partially cutaway front view of the vicinity of the rocker arm including a conventional zero lash adjustment device, Fig. 2 is an enlarged view of the zero lash adjustment device of Fig. 1, and Fig. 3 is a diagram of the zero lash adjustment device of the present invention. A cross-sectional view of one embodiment, Fig. 4 shows the mV- of Fig. 3.
5 is a sectional view of the second embodiment of the present invention,
6 is a sectional view taken along the line VI--VI in FIG. 5, FIG. 7 is a sectional view of the third embodiment of the present invention, and FIG. 8 is a sectional view taken along the line ■--■ in FIG. , 4... Suction and exhaust valves, 5... Valve drive cam, 7... Zero lash adjustment device, 8
... Song body, 9... First oil chamber, 9a...
...First reservoir chamber, 9b...Second reservoir chamber, 10...Curved plunger, 11...Second oil chamber, 12...Curved return spring, 15... ...
Check valve, 16... Valve hole, 19...
...Oil passage, 21...Check valve.

Claims

[Scope of utility model registration request]

A zero lash adjustment device that constantly adjusts the valve clearance of an internal combustion engine includes a cylindrical body with a bottom, a plunger that slides inside the body, and an oil passage provided in the plunger and connected to the plunger from the outside. a first oil passage that receives oil supply through the body; a second oil chamber provided between the body and the bottom of the plunger; A check valve that only allows oil to flow toward the oil chamber, and a valve hole provided at the bottom of the plunger that is opened and closed by the check valve.
a return spring that is interposed in the second oil chamber and acts in a direction that constantly extends the plunger and the body relative to each other; and a check valve that opens when a pressure equal to or higher than a set value is applied to the first oil chamber. and a first oil passage that connects the inside of the first oil chamber connected to the check valve to the oil passage.
A zero lash adjustment device for an intake and exhaust valve, characterized in that the device is separated into a reservoir chamber and a second reservoir chamber communicating with the valve hole.