JPH0219808U

JPH0219808U -

Info

Publication number: JPH0219808U
Application number: JP9692088U
Authority: JP
Priority date: 1988-07-23
Filing date: 1988-07-23
Publication date: 1990-02-09

Description

[Brief explanation of drawings]

第１〜３図に本考案に係るもので、第１図は第
１実施例の全体構成図、第２図は同作用説明図、
第３図は第２実施例の要部説明図、第４図は従来
例の構造説明図である。１０…ピストン、９ａ…上部ピストン室、９ｂ
…中部ピストン室、９ｃ…下部ピストン室、１０
ａ…上部ピストン室、１０ｂ…中部ピストン、１
０１，１０２…流入孔、１１４…切欠き、１１１
…ピストン、１１２…ラツク、１１６…切欠き、
１１５…流出孔。 1 to 3 are related to the present invention; FIG. 1 is an overall configuration diagram of the first embodiment, FIG. 2 is an explanatory diagram of the same operation,
FIG. 3 is an explanatory diagram of the main part of the second embodiment, and FIG. 4 is an explanatory diagram of the structure of the conventional example. 10... Piston, 9a... Upper piston chamber, 9b
...Middle piston chamber, 9c...Lower piston chamber, 10
a... Upper piston chamber, 10b... Middle piston, 1
01,102...Inflow hole, 114...Notch, 111
...Piston, 112...Rack, 116...Notch,
115...Outflow hole.

Claims

[Claims for Utility Model Registration] (1) A piston 10 having a small diameter upper piston 10a and a large diameter middle piston 10b that hydraulically drive an exhaust valve (or air supply valve) 12; the upper piston 10a and the middle piston 10; Piston chambers 9a and 9b formed in the upper part of the piston 10b; inflow holes 101 for supplying hydraulic oil to the piston chambers, respectively;
, 102; a notch 114 provided diagonally on the lower surface of the upper piston 10a to open and close the inflow hole 102; a pinion 111 provided below the piston 10; and a rack 11 that meshes with the pinion.
2; by rotating the pinion through the rack, the piston 10 is rotated to open and close the inflow hole 102 on the side surface of the upper piston 10a, and the opening and closing timing of the inflow hole 102 is controlled. A hydraulically driven valve train featuring: (2) A notch 116 inclined in the same direction as the notch 114 provided in the upper piston 10a is further provided on the upper surface of the middle piston 10b; the middle piston 10
2. The hydraulically driven valve train according to claim 1, wherein the timing of opening and closing of the outflow hole 115, which is opened and closed on the side surface b, can be freely controlled by a rack 112 and a pinion 111.