JPS61118905U

JPS61118905U -

Info

Publication number: JPS61118905U
Application number: JP148185U
Authority: JP
Priority date: 1985-01-11
Filing date: 1985-01-11
Publication date: 1986-07-26
Also published as: JPH0245455Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係る吸排気弁の作動停止機構
をロツク解除位置（不作動位置）で示す図解図、
第２図は第１図の要部の断面平面図、第３図は閉
弁時における第１図に示す装置のロツク位置（作
動位置）を示す図、第４図は開弁時における第３
図と同様の図、第５図は本考案の第２実施例を示
す第２図と同様の図、第６図は第５図の―線
断面図、第７図及び第８図は本考案の更に別の２
つの実施例を示す第２図と同様の図。１１……ロツカアーム、１３Ａ……第１アーム
、１３Ｂ……第２アーム、１５……固定軸、１９
……ロツカシヤフト、２１……バルブステム、２
３……カム、２９……復帰ばね、３０Ａ……作動
シリンダ室、３０Ｂ……背部シリンダ室、３１…
…シリンダ、３３……ピストン、４０……排気通
路、４５……ロツクピン。 FIG. 1 is an illustrative diagram showing the intake/exhaust valve operation stop mechanism according to the present invention in the unlocked position (inoperative position);
Fig. 2 is a sectional plan view of the main part of Fig. 1, Fig. 3 is a diagram showing the lock position (operating position) of the device shown in Fig. 1 when the valve is closed, and Fig. 4 is a diagram showing the lock position (operating position) of the device shown in Fig. 1 when the valve is open.
5 is a view similar to FIG. 2 showing a second embodiment of the present invention, FIG. 6 is a sectional view taken along the line -- of FIG. 5, and FIGS. 7 and 8 are views of the present invention. Yet another 2 of
FIG. 2 is a diagram similar to FIG. 2 showing two embodiments; 11... Rotsuka arm, 13A... First arm, 13B... Second arm, 15... Fixed axis, 19
...Lotsuka shaft, 21...Valve stem, 2
3...Cam, 29...Return spring, 30A...Working cylinder chamber, 30B...Back cylinder chamber, 31...
...Cylinder, 33...Piston, 40...Exhaust passage, 45...Lock pin.

Claims

[Scope of utility model registration request]

A swing arm-type rocker arm has one end rotatably supported by the rocker shaft and the other end abuts against the valve stem of the intake and exhaust valve, and the rocker arm is brought into contact with an intermediate portion of the rocker arm and swings about the rocker shaft as a fulcrum. In a valve train for an internal combustion engine, the locker arm has two separate arms: a first arm that is supported by the locker shaft, and a second arm that is in contact with the valve stem. The first and second arms are connected by a common fixed shaft extending parallel to the rock shaft so as to be relatively rotatable about the fixed shaft, so that both arms are in an operating position where both arms extend integrally. and an inoperative position bent about the fixed axis, and furthermore, a device is provided between the first and second arms to prevent relative rotation of both arms and to bring both arms into the operating position. A locking pin that locks integrally, a cylinder type actuator that releases the locking pin at a predetermined time, and a return means that constantly biases both arms toward the operating position and returns both arms to the operating position when the lock is released, The actuator is characterized in that it has a piston that slides in a cylinder chamber to actuate a lock pin, and that an exhaust passage that opens to the atmosphere is provided in a back cylinder chamber that faces the operating cylinder chamber of the cylinder with the piston in between. A mechanism for stopping the operation of intake and exhaust valves in internal combustion engines.