JPS6382005U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例を示す縦断面図、第
２図は同実施例の要部を拡大して示す縦断面図、
第３図は同実施例の仕切り部材を示す斜視図、第
４図は本考案の異なる例の要部を拡大して示す縦
断面図、第５図は同異なる例の仕切り部材を示す
斜視図、第６図は本考案の別の異なる例の要部を
拡大して示す縦断面図、第７図は従来のラツシユ
調整装置を施用した内燃機関の動弁機構を示す縦
断面図である。 １……タペツトボデイ、１ａ……カム摺接面、
２……プランジヤ、２ａ……ロツカアーム摺接面
、３……高圧室、５……リザーバ室、６……リタ
ーンスプリング、７……連通孔、８……チエツク
バルブ、９……オイル供給孔、１１……オイル導
入孔、１８，１９，２６……オイル通路、２０…
…透孔、２１……大気開放孔、２２，２２Ａ，２
２Ｂ……仕切り部材、２３，２３Ａ……中継通路
、２４……貫通孔。 FIG. 1 is a vertical cross-sectional view showing an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view showing an enlarged main part of the same embodiment,
FIG. 3 is a perspective view showing a partition member of the same embodiment, FIG. 4 is a vertical sectional view showing an enlarged main part of a different example of the present invention, and FIG. 5 is a perspective view showing a partition member of the same different example. , FIG. 6 is an enlarged vertical cross-sectional view of a main part of another different example of the present invention, and FIG. 7 is a vertical cross-sectional view showing a valve mechanism of an internal combustion engine to which a conventional lash adjustment device is applied. 1... Tappet body, 1a... Cam sliding contact surface,
2... Plunger, 2a... Rocker arm sliding surface, 3... High pressure chamber, 5... Reservoir chamber, 6... Return spring, 7... Communication hole, 8... Check valve, 9... Oil supply hole, 11... Oil introduction hole, 18, 19, 26... Oil passage, 20...
...Through hole, 21...Air opening hole, 22, 22A, 2
2B...Partition member, 23, 23A...Relay passage, 24...Through hole.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 底部にカム摺接面を有する有底筒状のタペツト
ボデイの周壁に内燃機関の潤滑油を取り入れるオ
イル供給孔を形成し、このタペツトボデイの内部
にはロツカアーム摺接面を有して内部にリザーバ
室を画成しているプランジヤを所要間隙をもつて
嵌合して高圧室を画成すると共に、このプランジ
ヤの底部に形成された連通孔にはリザーバ室から
高圧室への油の補償流れを許容するチエツクバル
ブを設け、さらに高圧室内にはタペツトボデイの
底部とプランジヤの底部とを互いに離間する方向
に付勢するリターンスプリングを設ける一方、前
記タペツトボデイとプランジヤとの周方向の嵌合
面間には環状のオイル通路を形成し、前記プラン
ジヤの周壁にはオイル通路とリザーバ室とを連通
するオイル導入孔と、これの上側で前記オイル通
路に連通する透孔とを形成すると共に、プランジ
ヤの頂部には大気開放孔を形成し、さらに前記リ
ザーバ室内の上部に仕切り部材を設けて前記透孔
を大気開放孔に継げる中継通路を画成すると共に
、この仕切り部材には中継通路とリザーバ室とを
連通する貫通孔を形成したことを特徴とする内燃
機関の動弁機構におけるラツシユ調整装置。 An oil supply hole for taking lubricating oil from an internal combustion engine is formed in the circumferential wall of a bottomed cylindrical tapepet body having a cam sliding surface at the bottom, and an oil supply hole for taking lubricating oil from the internal combustion engine is formed inside the tapepet body, and a rocker arm sliding surface is formed inside the tapepet body, and a reservoir chamber is formed inside. The defining plungers are fitted with a required gap to define a high pressure chamber, and a communication hole formed at the bottom of the plunger allows a compensating flow of oil from the reservoir chamber to the high pressure chamber. A check valve is provided, and a return spring is provided in the high pressure chamber to bias the bottom of the tapepet body and the bottom of the plunger in the direction of separating them from each other, while an annular spring is provided between the fitting surfaces of the tapepet body and the plunger in the circumferential direction. An oil passage is formed in the peripheral wall of the plunger, and an oil introduction hole that communicates between the oil passage and the reservoir chamber is formed, and an oil introduction hole that communicates with the oil passage is formed above the oil passage, and the top of the plunger is provided with an air atmosphere. An open hole is formed, and a partition member is provided at the upper part of the reservoir chamber to define a relay passage that connects the through hole to the atmosphere opening hole, and the partition member is provided with a communication passage between the relay passage and the reservoir chamber. A lash adjustment device for a valve mechanism of an internal combustion engine, characterized in that a through hole is formed.