JPH03127004U

JPH03127004U -

Info

Publication number: JPH03127004U
Application number: JP3423890U
Authority: JP
Priority date: 1990-04-02
Filing date: 1990-04-02
Publication date: 1991-12-20

Description

[Brief explanation of the drawing]

第１〜４図は本考案の第一〜第四実施例を示す
、それぞれ第７図のＡ部に相当する拡大断面図、
第５図はエンジンの動弁機構の１例を示す斜視図
、第６図は第５図に示した動弁機構に組み込んだ
カムフオロア装置の部分縦断側面図、第７図は第
６図のＢ−Ｂ断面図である。１……クランクシヤフト、２……カムシヤフト
、３……ロツカーアーム、４……吸気弁、５……
排気弁、６……カム、７……支持壁部、７ａ……
内側面、８……軸、９……ころ、１０……ローラ
、１０ａ……端面、１１……通孔、１２……隙間
。 1 to 4 are enlarged sectional views corresponding to section A in FIG. 7, respectively, showing the first to fourth embodiments of the present invention;
FIG. 5 is a perspective view showing an example of an engine valve mechanism, FIG. 6 is a partial vertical cross-sectional side view of a cam follower device incorporated in the valve mechanism shown in FIG. 5, and FIG. 7 is B of FIG. 6. -B sectional view. 1...Crankshaft, 2...Camshaft, 3...Rotzker arm, 4...Intake valve, 5...
Exhaust valve, 6... cam, 7... support wall, 7a...
Inner surface, 8... shaft, 9... roller, 10... roller, 10a... end face, 11... through hole, 12... gap.

Claims

[Claims for Utility Model Registration] (1) A cam fixed to a camshaft that rotates in synchronization with the engine crankshaft, and a member provided opposite to this cam that receives the movement of this cam with an interval between them. a pair of supporting walls formed;
An engine valve train consisting of a shaft fixed across the pair of support walls, and a short cylindrical roller rotatably supported around the shaft via a plurality of rollers. A cam follower device for a valve mechanism of an engine, characterized in that both end surfaces of the roller are conical inclined surfaces inclined in a direction in which the inner circumferential edge side protrudes. (2) Annular washers are interposed between both end surfaces of the roller and the inner surfaces of the pair of support walls, and both end surfaces of the roller are made flat surfaces, and the outer surfaces of each washer are made flat instead. The cam follower device for a valve mechanism of an engine according to claim 1, wherein the cam follower device has a conical inclined surface that is inclined in a direction in which the peripheral edge side protrudes. (3) A cam fixed to a camshaft that rotates in synchronization with the engine's crankshaft, and a pair of supporting walls formed at intervals on a member that faces the cam and receives the movement of the cam. and,
An engine valve train consisting of a shaft fixed across the pair of support walls, and a short cylindrical roller rotatably supported around the shaft via a plurality of rollers. In the cam follower device for a mechanism, the inner surfaces of the pair of supporting walls have a conical surface shape, the portions facing both end surfaces of the roller being inclined in a direction in which the portion closer to the center of the shaft protrudes. A cam follower device for an engine valve mechanism, characterized by having an inclined surface. (4) Annular washers are interposed between both end surfaces of the roller and the inner surfaces of the pair of support walls, and the inner surfaces of the pair of support walls are made flat, and each washer is made flat instead. 4. The cam follower device for a valve train of an engine according to claim 3, wherein the inner surface is a conical inclined surface inclined in a direction in which the inner peripheral edge side protrudes. (5) The cam follower device for an engine valve mechanism according to claim 1 or 3, wherein a circular washer is interposed between both end surfaces of the roller and the inner surfaces of the pair of support walls. (6) The cam follower device for an engine valve mechanism according to claim 1 or 2, wherein the inclined surface is constituted by a part of a spherical surface centered on a point on an extension of the central axis of the roller. (7) The inclined surface is defined by rotating a circle whose center is a point deviated from the extension line of the central axis of the roller by a distance greater than the radius of the roller, about the extension line, The cam follower device for a valve train of an engine according to claim 3 or 4, wherein the cam follower device is constituted by a part of a donut-shaped circular arc surface. (8) The cam follower device for an engine valve mechanism according to claim 2, 4, or 5, wherein the washer is rotatable around the shaft.