JPH0231306U

JPH0231306U -

Info

Publication number: JPH0231306U
Application number: JP3900289U
Authority: JP
Priority date: 1988-04-01
Filing date: 1989-03-31
Publication date: 1990-02-27
Anticipated expiration: 2004-03-31
Also published as: JP2549053Y2

Description

[Brief explanation of the drawing]

第１図から第１０図はこの考案の第１実施例に
かかる内燃機関の動弁機構を示し、第１図が横断
面図、第２図が平面図、第３図が一部拡大断面図
、第４図が要部拡大図、第５図が第４図の―
矢視断面図、第６図ａが主要部品の正面断面図、
第６図ｂが主要部品の側面図、第７図が主要部の
平面断面図、第８図ａ，ｂ，ｃがそれぞれ主要部
品の平面図、正面図、底面図、第９図および第１
０図がそれぞれ組立方法を示す分解斜視図である
。第１１図ａ，ｂはこの考案の第２実施例にかか
る内燃機関の動弁機構の主要部品の正面図と側面
図、第１２図から第１５図はこの考案の第３実施
例にかかる内燃機関の動弁機構を示し、第１２図
が平面図、第１３図ａが一の主要部品の平面図、
第１３図ｂが同部品の底面図、第１３図ｃが第１
３図ａのｃ矢視図、第１３図ｄが第１３図
ａのｄ矢視図、第１３図ｅが第１３図ａの
ｅ矢視断面図、第１３図ｆが第１３図ｃの
ｆ矢視断面図、第１３図ｇが第１３図ｂの
ｇ矢視断面図、第１４図ａは他の一の主要
部品の平面図、第１４図ｂが同部品の左側面図、
第１４図ｃが第１４図ａの矢視断面図、第
１５図が一部の模式平面図である。第１６図ａ，
ｂはこの考案の第４実施例にかかる内燃機関の動
弁機構の主要部品の正面図と側面図である。第１
７図はこの考案の第５実施例にかかる内燃機関の
動弁機構の主要部品の斜視図である。第１８図ａ
，ｂ，ｃ，ｄはそれぞれこの考案にかかる内燃機
関の主要部品の他の態様を示す図である。１３…シリンダヘツド、１５，１５_１，１５_２，１５_３，１５_４…燃焼室（シリンダ）、２６，
２６ｅ_１，２６_１，２６_２，２６_３，２６_４，２
６ｅ_４…ホルダ、２７…カムシヤフト、２８，２
９…ロツカアームシヤフト、３５，３５ｅ，３５
_１，３５_２，３５_３，３５_４…凹部（支持部）、
４６，４６ａ，４６ｂ，４７，４７ａ，４７ｂ…
ロツカアーム、４８，４８ｅ_１，４８_１−２，４
８_２−３，４８_３−４，４８_４ｅ…短軸、５１，
５１ｅ_１，５１_１−２，５１_２−３，５１_３−４，５１ｅ_４…突起（回り止め部）、６５…突起（
偏心凸部）、６６…凹部（偏心凹部）、７５，７
８…曲面、７６，７９…平面、７７…平面部、９
９…喰込部。 1 to 10 show a valve mechanism for an internal combustion engine according to a first embodiment of this invention, in which FIG. 1 is a cross-sectional view, FIG. 2 is a plan view, and FIG. 3 is a partially enlarged sectional view. , Figure 4 is an enlarged view of the main parts, and Figure 5 is an enlarged view of Figure 4.
A sectional view taken in the direction of arrows, FIG. 6a is a front sectional view of the main parts,
Fig. 6b is a side view of the main parts, Fig. 7 is a plan sectional view of the main parts, Figs.
Figure 0 is an exploded perspective view showing the assembly method. Figures 11a and 11b are front and side views of main parts of a valve mechanism for an internal combustion engine according to a second embodiment of this invention, and Figures 12 to 15 are internal combustion engine according to a third embodiment of this invention. The valve mechanism of the engine is shown, FIG. 12 is a plan view, FIG. 13a is a plan view of one main component,
Figure 13b is a bottom view of the same part, Figure 13c is the first
Fig. 13 d is a view taken in the direction of the d arrow in Fig. 13 a, Fig. 13 e is a sectional view taken in the e direction of Fig. 13 a, and Fig. 13 f is a sectional view taken in the direction of the e arrow in Fig. 13 c. 13g is a sectional view of FIG. 13b in the direction of the g arrow; FIG. 14a is a plan view of another major component; FIG. 14b is a left side view of the same component;
FIG. 14c is a sectional view taken in the direction of the arrows in FIG. 14a, and FIG. 15 is a partial schematic plan view. Figure 16a,
b is a front view and a side view of main parts of a valve mechanism for an internal combustion engine according to a fourth embodiment of the invention; 1st
FIG. 7 is a perspective view of the main parts of a valve mechanism for an internal combustion engine according to a fifth embodiment of this invention. Figure 18a
, b, c, and d are views showing other aspects of the main parts of the internal combustion engine according to the invention, respectively. 13...Cylinder head, 15, 15 ₁ , 15 ₂ , 15 ₃ , 15 ₄ ... Combustion chamber (cylinder), 26,
26e ₁ , 26 ₁ , 26 ₂ , 26 ₃ , 26 ₄ , 2
6e ₄ ...Holder, 27...Camshaft, 28,2
9...Rotsuka armshaft, 35, 35e, 35
₁ , 35 ₂ , 35 ₃ , 35 ₄ ... recess (support part),
46, 46a, 46b, 47, 47a, 47b...
Rotsuka arm, 48, 48e ₁ , 48 _1-2 , 4
8 _2-3 , 48 _3-4 , 48 ₄ e...Short axis, 51,
51e ₁ , 51 _1-2 , 51 _2-3 , 51 _3-4 , 51e ₄ ...Protrusion (rotation stopper), 65...Protrusion (
eccentric convex portion), 66... recess (eccentric recess), 75, 7
8...Curved surface, 76, 79...Plane, 77...Plane part, 9
9...Engraving part.

Claims

[Claims for Utility Model Registration] (1) A rocker arm shaft that swingably supports the rocker arm, and a support part into which the end of the rocker arm shaft is fitted, and the end of the rocker arm shaft is formed in the support part. a holder for supporting the locking arm shaft into which the locking arm shaft is fitted, the end portion of the locking arm shaft fitting into the supporting portion having a radial dimension from the center of the shaft axis of the locking arm shaft; A rotation prevention part having a surface that changes in the circumferential direction is integrally formed, and a receiving part that engages with the rotation prevention part and prevents rotation of the rocker arm shaft is integrally formed in the support part. Features of internal combustion engine valve mechanism. (2) The rotation stopper is formed of a protrusion integrally formed on the end surface of the locker armshaft, offset from the center of the axis of the locker armshaft, and the support portion is formed on a surface of the holder facing the locker armshaft. 2. A support recess formed in the upper support recess into which the end of the rocker arm shaft fits, and wherein the receiving part comprises a recess formed in the bottom surface of the upper support recess into which the protrusion fits. Valve mechanism of the internal combustion engine described. (3) The valve train mechanism for an internal combustion engine according to claim 2, wherein the protrusion and the recess are formed to have a substantially arcuate cross section. (4) The valve operating mechanism for an internal combustion engine according to claim 2, wherein the protrusion and the recess are formed in a shape having a peripheral surface having a flat portion and a curved portion. (5) The valve operating mechanism for an internal combustion engine according to claim 4, wherein the protrusion and the recess are formed to have a substantially semicircular cross section. (6) The holder has a plug hole for inserting a spark plug, and the protrusion and the recess are formed with a flat portion of the circumferential surface located on the plug hole side. Item 5. The valve mechanism for an internal combustion engine according to item 5. (7) The valve operating mechanism for an internal combustion engine according to claim 5, wherein the front protrusion and the recess have a flat peripheral surface substantially parallel to the plug hole. (8) The rotation stopper is formed of a protrusion that is integrally protruded from the end face of the locking arm shaft and has a flat surface on at least a part of the circumferential surface, and the supporting portion faces the locking arm shaft of the holder. a support recess formed on a surface of the locking arm shaft into which the end of the rocker armshaft fits, and the receiving part comprising a recess formed on a bottom surface of the support recess into which the protrusion fits. Item 1. A valve mechanism for an internal combustion engine according to item 1. (9) The valve operating mechanism for an internal combustion engine according to claim 8, wherein the protrusion and the recess are formed to have a substantially polygonal cross section whose center coincides with the center of the rocker arm shaft axis. (10) The valve operating mechanism for an internal combustion engine according to claim 2, 8, or 9, wherein the rocker arm shaft has a substantially annular flat portion around the protrusion on an end surface. (11) 11 The valve operating mechanism for an internal combustion engine according to claim 2 or 8, wherein the protrusion and the recess are formed at a position where the center of gravity of the protrusion is spaced apart from the cavity of the holder. . (12) 12 A claim characterized in that the rotation preventing portion is formed by molding the end portion of the locking arm shaft into a non-circular cross-sectional shape, and the supporting portion of the holder is formed from a support recess having a non-circular cross-sectional shape. Item 1. A valve mechanism for an internal combustion engine according to item 1. 〓(13)１３〓 In a multi-cylinder internal combustion engine having a plurality of cylinders, the rocker arm shaft is divided into a plurality of short shafts corresponding to the plurality of cylinders, and the rotation is provided on one end surface of these short shafts. A stop is formed, and the holder in which the support part is formed between adjacent short shafts is arranged, and the ends of these short shafts are supported by the support part of the holder, and the support part of the holder is provided with the support part, respectively. 2. The valve operating mechanism for an internal combustion engine according to claim 1, wherein the receiving portion is formed to fit into a rotation preventing portion. 〓(14)１４〓 Forming a lubricating oil passage opening at an end in the locking arm shaft, and forming a lubricating oil passage opening in the support portion and communicating with the lubricating oil passage of the locking arm shaft in the holder. death,
2. The valve operating mechanism for an internal combustion engine according to claim 1, wherein lubricating oil is supplied to the sliding portion via a lubricating oil path of the rocker arm shaft and a lubricating oil path of the holder. (15) 15 The locking arm shaft and the holder have a lubricating oil passage that communicates with each other and supplying lubricating oil to the sliding part, and a portion of the lubricating oil passage of the locking arm shaft is formed in the protrusion. Claim 2, characterized in that the projection is opened at the tip of the projection.
The valve mechanism for an internal combustion engine according to claim 8 or 14. (16) 16 The rocker arm shaft extends through a support hole formed in the rocker arm to support the rocker arm, and the rocker arm shaft has a main oil passage in which the lubricating oil passage extends in the axial direction, and a main oil passage in which the lubricating oil passage extends in the axial direction. It has a branch oil passage extending radially from the main oil passage and opening into the support hole of the rocker arm, and an oil groove is formed on the circumferential surface of the support hole of the rocker arm on the camshaft side. The valve mechanism for an internal combustion engine according to claim 1.