JPH03116713U

JPH03116713U -

Info

Publication number: JPH03116713U
Application number: JP2489290U
Authority: JP
Priority date: 1990-03-14
Filing date: 1990-03-14
Publication date: 1991-12-03
Anticipated expiration: 2005-03-14
Also published as: JPH0755285Y2

Description

[Brief explanation of drawings]

第１図は第２図の−線に沿う断面図、第２
図は第５図の動弁装置が適用されたシリンダヘツ
ドの部分平面図、第３図は第２図の−線に沿
う断面図、第４図は第１図のロツカシヤフトの他
端部を示す斜視図、第５図はこの考案に係る４サ
イクルエンジンの動弁装置の一実施例を示す斜視
図、第６図は第５図の動弁装置の平面図、第７図
および第８図は第５図の動弁装置の作用を示す動
作状態図、第９図は第１図および第５図のカムの
カムプロフイールを示す図、第１０図および第１
１図は第９図に示すカムプロフイールのそれぞれ
の変形例を示す図である。１，２……バルブ、３……低速用カム、４，５
……中高速用カム、７……低速用ロツカアーム、
８，９……中高速用ロツカアーム、１１……ロツ
カシヤフト、１２，１３……偏心ブツシユ、２１
……シリンダヘツド、１５……油圧シリンダ、１
６……ラツク、１７……ピニオン、３０……ロツ
カシヤフト軸受部、３１……位置決めスプリング
、３２……ストツパ溝、３３……スクリユー孔、
３４……ストツパスクリユー、Ａ……低速用カム
のカムプロフイール、Ｂ……中高速用カムのカム
プロフイール。 Figure 1 is a sectional view taken along the - line in Figure 2;
The figure shows a partial plan view of a cylinder head to which the valve train shown in Fig. 5 is applied, Fig. 3 shows a sectional view taken along the - line in Fig. 2, and Fig. 4 shows the other end of the rocker shaft shown in Fig. 1. FIG. 5 is a perspective view showing an embodiment of the valve train for a four-stroke engine according to the invention, FIG. 6 is a plan view of the valve train shown in FIG. 5, and FIGS. 7 and 8 are Fig. 5 is an operating state diagram showing the action of the valve train; Fig. 9 is a diagram showing the cam profiles of the cams shown in Figs. 1 and 5; Figs.
FIG. 1 is a diagram showing each modification of the cam profile shown in FIG. 9. 1, 2... Valve, 3... Low speed cam, 4, 5
...cam for medium and high speeds, 7...rotsuka arm for low speeds,
8, 9...Mid-high speed rocker arm, 11...Rocker shaft, 12,13...Eccentric bushing, 21
... Cylinder head, 15 ... Hydraulic cylinder, 1
6... Rack, 17... Pinion, 30... Lock shaft bearing, 31... Positioning spring, 32... Stopper groove, 33... Screw hole,
34... Stop pass screw, A... Cam profile of low speed cam, B... Cam profile of medium and high speed cam.

補正平２．４．２４図面の簡単な説明を次のように補正する。明細書の第２４頁第２行記載の「カムプロフイ
ール」を『バルブリフトカーブ』に改める。Amendment 2.4.24 The brief description of the drawing is amended as follows. "Cam profile" written on page 24, line 2 of the specification has been changed to "valve lift curve."

Claims

[Scope of utility model registration request]

a rocker shaft rotatably supported and formed with an eccentric large diameter portion; a first rocker arm directly fitted into the rocker shaft; The second part inserted into the
and a third rocker arm, and a first rocker arm that drives the first, second and third rocker arms, respectively.
, second and third cams, the second and third cams are formed with the same cam profile, the cam profile of the first cam is formed differently from the cam profile, and A valve train for a four-stroke engine, wherein a drive mechanism for rotating the locking shaft is connected to one end of the locking shaft, and a locking shaft rotation positioning stopper mechanism is installed at the other end of the locking shaft.