JPS6218306U

JPS6218306U -

Info

Publication number: JPS6218306U
Application number: JP10880185U
Authority: JP
Priority date: 1985-07-18
Filing date: 1985-07-18
Publication date: 1987-02-03

Description

[Brief explanation of the drawing]

第１図は第３図の一部の拡大図でロツク機構の
詳細を示し、第２図はシリンダヘツドの模式的平
面図、第３図は第４図の―線に沿つたシリン
ダヘツドの一部の垂直断面図で第３図ａはバルブ
リフト状態を第３図ｂは閉弁状態を示し、第４図
は動弁装置の一部分の一部切り欠き平面図、第５
図はロツカーアームの斜視図、第６図はロツカー
アームシヤフトの一部の平面図で案内溝の形状を
示し、第７図は第６図の断面図でａおよびｃは第
６図のＡ―Ａ矢視断面をｂはＢ―Ｂ矢視
断面を示し、第８図はカムシヤフトの断面図でス
トツパリングを示し、第９図は動弁用カムの種々
の区間を示すタイミング図、第１０図は第４図の
左側部分と同様の図でａはロツカーアームの第１
位置をｂは第２位置を示し、第１１図は摺動軸用
ロツク機構のロータを示す図でａはロータ側面を
ｂはロータ端面を示し、第１２図は摺動軸用ロツ
ク機構のラチエツトを示すものでａはその端面を
ｂはその側面を示し、第１３図はロータとラチエ
ツトの相対関係を示す模式図である。１８……ロツカーアーム、２０……ロツカーア
ームシヤフト、２２……カムシヤフト、４２，４
４……カム、４６……摺動軸、５２，５４……ば
ね、５８……ロツカーアームのロツク機構、５９
……案内溝、６０……案内手段、６１……ボール
、６２……係合部材、６９……ストツパリング、
９４……摺動軸用ロツク機構。 Fig. 1 is an enlarged view of a part of Fig. 3 showing details of the lock mechanism, Fig. 2 is a schematic plan view of the cylinder head, and Fig. 3 is a partial view of the cylinder head taken along the line - - in Fig. 4. 3A shows the valve lift state, FIG. 3B shows the valve closed state, FIG. 4 is a partially cutaway plan view of a part of the valve train, and FIG.
The figure is a perspective view of the Rocker arm, Figure 6 is a plan view of a part of the Rocker arm shaft showing the shape of the guide groove, Figure 7 is a sectional view of Figure 6, and a and c are A-- in Figure 6. 8 is a sectional view of the camshaft and shows the stopper ring, FIG. 9 is a timing diagram showing various sections of the valve train cam, and FIG. In the same view as the left part of Fig. 4, a is the first part of the Rocker arm.
11 shows the rotor of the sliding shaft locking mechanism, a shows the side surface of the rotor, b shows the end surface of the rotor, and FIG. 12 shows the ratchet of the sliding shaft locking mechanism. 13 is a schematic diagram showing the relative relationship between the rotor and the ratchet. 18...Rotzker arm, 20...Rotzker armshaft, 22...Camshaft, 42,4
4...Cam, 46...Sliding shaft, 52, 54...Spring, 58...Rocker arm locking mechanism, 59
... Guide groove, 60 ... Guide means, 61 ... Ball, 62 ... Engagement member, 69 ... Stopper ring,
94...Lock mechanism for sliding shaft.

Claims

[Claims for Utility Model Registration] 1. A Rocker arm 18 that operatively engages with an intake valve or an exhaust valve is swingably and axially slidably mounted on a Rocker arm shaft 20 and rotates in synchronization with the engine crankshaft. Two valve-driving cams 42 and 44 with different cam profiles are arranged adjacent to each other on the camshaft 22, and the rocker arm engages with one of the valve-driving cams at a first position and the other valve-driving cam at a first position. The operating mode of the intake valve or the exhaust valve is changed by sliding the rocker arm in the axial direction on the rocker arm shaft between the second position where the rocker arm is engaged, and the rocker arm is moved to the second position according to the engine operating conditions. means for selectively resiliently biasing the rocker arm to the first position or the second position when the valve operating cam is in an angular position other than the predetermined range of angular positions; a releasable locking mechanism that locks in the axial direction with respect to the car arm shaft and releases the rocker arm when the valve operating cam is in the predetermined range of angular positions. In the valve device, the locking mechanism 58 of the rocker arm includes a guide means 60 provided on the outer peripheral surface of the rocker arm, and an engaging member 6 attached to the rocker arm to engage with the guide means and move together with the rocker arm.
2. A variable valve operating mode valve operating device comprising: 2. The guide means includes a guide groove 59 provided on the outer circumferential surface of the rocker arm, and the guide groove 59 allows the rocker arm to
a circumferentially extending first groove portion A-B which receives the engagement member 62 of the rocker arm when in the first position; 2. The valve train according to claim 1, further comprising a second groove portion B-C extending diagonally with respect to the groove portion. 3 The engaging member is the boss portion 63 of the rocker arm.
The valve operating device according to claim 2, which is a registered utility model, and comprises a ball 61 that projects radially inward from an inner circumferential surface of the ball and engages with the guide groove. 4 The ball 61 is moved into the guide groove 5 by the spring 67.
9. The valve train according to claim 3, wherein the valve train is elastically biased. 5. A stopper ring 69 having an inner diameter larger than the outer diameter of the camshaft and an outer diameter approximately equal to the diameter of the perfect circular part of the valve drive cam is installed between the two valve drive cams, and the stopper ring 69 is The valve train according to claim 2, wherein the valve train is eccentrically supported toward an angular position on the advance side from the nose portion 72 of the valve train cam. 6. The valve train according to claim 5, wherein the stopper ring 69 is comprised of two split ring pieces that fit together in the circumferential direction. 7. The valve train according to claim 6, wherein the stopper ring is elastically eccentric by a spring housed in a camshaft.