JPS62101013U

JPS62101013U -

Info

Publication number: JPS62101013U
Application number: JP19395985U
Authority: JP
Priority date: 1985-12-17
Filing date: 1985-12-17
Publication date: 1987-06-27

Description

[Brief explanation of the drawing]

第１図は本考案に係る直動型油圧リフターの一
実施例を示す要部断面図、第２図は第１図のＡ部
拡大図、第３図は本考案の使用例を示す要部断面
図、第４図は従来の直動型油圧リフターの一例を
示す要部断面図、第５図は同従来の直動型油圧リ
フターの使用例を示す要部断面図である。１…カム、２…タペツト本体、４…吸排気用バ
ルブ、５…シリンダヘツド部、９…タペツトヘツ
ド部、１１…プランジヤ案内部、１２…プランジ
ヤ、１３…シートプランジヤ、１４…通孔、１５
…第１油室、１６…第２油室、１７…チエツクバ
ルブ、１８…リターンスプリング、１９…バルブ
ステム、２２…バルブスプリング、２６…環状油
室、３６…弾性密閉体。 Fig. 1 is a sectional view of the main part showing an embodiment of the direct-acting hydraulic lifter according to the present invention, Fig. 2 is an enlarged view of part A in Fig. 1, and Fig. 3 is the main part showing an example of the use of the present invention. 4 is a cross-sectional view of a main part showing an example of a conventional direct-acting hydraulic lifter, and FIG. 5 is a cross-sectional view of a main part showing an example of use of the conventional direct-acting hydraulic lifter. DESCRIPTION OF SYMBOLS 1... Cam, 2... Tappet body, 4... Intake/exhaust valve, 5... Cylinder head part, 9... Tappet head part, 11... Plunger guide part, 12... Plunger, 13... Seat plunger, 14... Through hole, 15
...first oil chamber, 16...second oil chamber, 17...check valve, 18...return spring, 19...valve stem, 22...valve spring, 26...annular oil chamber, 36...elastic sealing body.

Claims

[Scope of Claim for Utility Model Registration] (1) A tappet body that is slidably inserted into a tappet guide hole formed in a cylinder head of an internal combustion engine and has a plunger guide portion inside, and this tappet body. a bottomed cylindrical plunger that is slidably inserted with a predetermined clearance with the plunger guide portion formed in the main body; and a head of the tapepet main body that is located inside the plunger. A seat plunger is slidably inserted into the inner wall of the plunger with a predetermined clearance so as to be separated into two chambers, a first oil chamber on the side of the tappet head side and a second oil chamber on the bottom side of the plunger. a check valve disposed within the second oil chamber to allow only flow of hydraulic oil from the first oil chamber to the second oil chamber through the through hole formed in the seat plunger; The plunger has an intake/exhaust valve equipped with a valve stem that comes into elastic contact with the lower surface of the bottom of the plunger in the axial direction, and a substantially cylindrical tappet guide part constituting the side part of the tappet body has one end that connects the tappet guide part and the seat plunger. An oil introduction hole is formed, the other end of which communicates with the annular oil chamber formed by the oil pump, and the other end communicates with the oil pump, and the oil is supplied from the oil introduction hole to the second oil chamber via the annular oil chamber and the first oil chamber. A direct-acting hydraulic lifter that opens and closes the intake and exhaust valves in response to the rotation of a cam that slides on the tappet head using hydraulic oil as a medium, the lower outer periphery of the plunger guide portion of the tappet body; A direct-acting hydraulic lifter, characterized in that an elastic sealing body is installed between the lower outer periphery of the plunger to prevent leakage of hydraulic oil through a clearance formed between the plunger guide part and the plunger. (2) The direct-acting hydraulic lifter according to claim 1, wherein the elastic sealing body is a telescopic bellows.