JPH03106101U

JPH03106101U -

Info

Publication number: JPH03106101U
Application number: JP1990014220U
Authority: JP
Priority date: 1990-02-15
Filing date: 1990-02-15
Publication date: 1991-11-01

Description

[Brief explanation of drawings]

第１〜５図は本考案の一実施例としてのスプロ
ケツト位置決め手段付きエンジンを示すもので、
第１図はそのカムスプロケツト装着部分の概略構
成を示す模式的斜視図、第２図はそのカムスプロ
ケツト仮固定状態を示す模式的正面図、第３図は
そのカムスプロケツト仮固定状態を示す模式的斜
視図、第４図はそのカムスプロケツトを示す模式
的斜視図、第５図はその変形例を示す模式的斜視
図であり、第６〜１１図は従来のエンジンにおけ
るスプロケツト周辺構造を示すもので、第６図は
Ｖ型ＳＯＨＣ式エンジンのカムの回転位置を示す
模式図、第７図はカム取付状態を示す模式的正面
図、第８図はＶ型ＤＯＨＣ式エンジンのカムの回
転位置を示す模式図、第９図はＤＯＨＣ式エンジ
ンのカムの回転位置を示す模式図、第１０図はＶ
型ＳＯＨＣ式エンジンの歯付きベルト取付状態を
示す模式図、第１１図はＤＯＨＣ式エンジンのス
プロケツト位置を示す模式図である。３……ゼロラツシユアジヤスタ、４……弁ばね
、５，５Ｌ，５Ｒ……カムスプロケツト（スプロ
ケツト）、５ａ……スプロケツト位置決め用凹部
、６……ロツカアーム、７……エンジンカバー取
付縁部、７ａ……ストツパ用凹部、８……ハウジ
ング部、８ａ……ストツパ用凹部、８ｂ……スト
ツパ用凹部としての穴、９……板金製ストツパ、
１０Ａ……カムシヤフト、１６……治具、Ｂ……
エンジンのボデイ、Ｄ……ドライバー、Ｌ……左
バンク、Ｐ１……印、Ｒ……右バンク。 Figures 1 to 5 show an engine with sprocket positioning means as an embodiment of the present invention.
Fig. 1 is a schematic perspective view showing the schematic configuration of the cam sprocket mounting part, Fig. 2 is a schematic front view showing the cam sprocket temporarily fixed state, and Fig. 3 is a schematic diagram showing the cam sprocket temporarily fixed state. FIG. 4 is a schematic perspective view showing the cam sprocket, FIG. 5 is a schematic perspective view showing a modification thereof, and FIGS. 6 to 11 show the structure around the sprocket in a conventional engine. , Fig. 6 is a schematic diagram showing the rotational position of the cam of the V-type SOHC engine, Fig. 7 is a schematic front view showing the cam installation state, and Fig. 8 is a schematic diagram showing the rotational position of the cam of the V-type DOHC engine. A schematic diagram, Fig. 9 is a schematic diagram showing the rotational position of the cam of a DOHC engine, and Fig. 10 is a schematic diagram showing the rotational position of the cam of a DOHC engine.
FIG. 11 is a schematic diagram showing the toothed belt attachment state of the SOHC type engine, and FIG. 11 is a schematic diagram showing the sprocket position of the DOHC type engine. 3... Zero latch adjuster, 4... Valve spring, 5, 5L, 5R... Cam sprocket (sprocket), 5a... Sprocket positioning recess, 6... Rocker arm, 7... Engine cover mounting edge, 7a... Recessed part for stopper, 8... Housing part, 8a... Recessed part for stopper, 8b... Hole as recessed part for stopper, 9... Stopper made of sheet metal,
10A...Camshaft, 16...Jig, B...
Engine body, D...driver, L...left bank, P1...mark, R...right bank.

Claims

[Scope of utility model registration request]

In a reciprocating engine, a crankshaft, a plurality of camshafts provided to open and close intake valves and exhaust valves, a cam sprocket provided at each end of the crankshaft and the camshaft, and these cam sprockets are provided. and a toothed belt that interconnects the engine body, and in order to position the cam sprocket at a required rotational angle when the toothed belt is attached to the cam sprocket, two parts are provided on the outer periphery of the engine body.
A stopper recess is formed in each of the protrusions at the location, and a sprocket positioning recess is formed on the engine side end surface of the outer circumference of the cam sprocket, so that the pair of stopper recesses and the sprocket positioning recess are formed. An engine with sprocket positioning means, characterized in that the cam sprocket is arranged so as to be located on the same straight line in a required rotation angle state.