JPS60131610U

JPS60131610U - Automatic decompression device when starting the engine

Info

Publication number: JPS60131610U
Application number: JP1924984U
Authority: JP
Inventors: 中野　啓一
Original assignee: 株式会社クボタ
Priority date: 1984-02-13
Filing date: 1984-02-13
Publication date: 1985-09-03
Also published as: JPH0144726Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図乃至第４図は、本考案の実施例を示すものであり
、第１図はカムギヤ周辺の要部縦断側面図、第２図はデ
コンプ状態を示す第１図の作動機構図、第３図はデコン
プ解除状態を示す第２図相当図、第４図は他の実施例を
示す第２図相当図、　　　　゛第５図は従来例を示すカ
ムギヤ周辺の要部縦断正面図である。１・・・・・・動弁装置、２・・・・・・カム軸、３・
・・・・・カム、５・・・・・・カムギヤ、７・・・・
・・３と５との間の軸部分、８・・・・・・案内孔、１
０・・・・・・デコンプピン、１２・・・・・・遠心錘
、１４・・・・・・デコンプ用バネ、１６・・・・・・
１０の入力端部、１７・・・・・・１０の出力端部、１
８・・・・・・タペット、２０・・・・・・転動穴、２
０ａ・・・・・・ギヤ中心に近い大部分、２０ｂ・・・
・・・ギヤ中心から遠い大部分、Ａ・・・・・・デコン
プ位置、Ｂ・・・・・・デコンプ解除位置、Ｃ・・・・
・・ギヤ回転中心、Ｅ・・・・・・エンジン、Ｌ・・・
・・・Ｃからの距離、Ｒ・・・・・・ギヤ回転方向、θ
１．θ２・・・・・・２０のＲに対する傾斜角度。1 to 4 show an embodiment of the present invention. FIG. 1 is a longitudinal cross-sectional side view of the main part around the cam gear, FIG. 2 is a diagram of the operating mechanism in FIG. 1 showing the decompression state, and FIG. 3 is a view equivalent to FIG. 2 showing a decompression release state, FIG. 4 is a view equivalent to FIG. 2 showing another embodiment, and FIG. 1...Valve train, 2...Camshaft, 3.
...Cam, 5...Cam gear, 7...
...Shaft part between 3 and 5, 8... Guide hole, 1
0...Decompression pin, 12...Centrifugal weight, 14...Decompression spring, 16...
10 input ends, 17...10 output ends, 1
8... Tappet, 20... Rolling hole, 2
0a... Most part near the center of the gear, 20b...
...Most part far from the gear center, A...Decompression position, B...Decompression release position, C...
...Gear rotation center, E...Engine, L...
...Distance from C, R...Gear rotation direction, θ
1. θ2...Inclination angle with respect to R of 20.

Claims

[Claims for Utility Model Registration] ■ A cam gear 5 is fixed to the cam shaft 2 of the valve train 1 of the engine E with a suitable distance from the cam 3, and the cam 3 and the cam gear 5
A guide hole 8 is passed transversely through the shaft portion 7 between Decompression spring 1 that presses 12 toward the centripetal side
4, the centrifugal weight 12 and the input end 1 of the decompression pin 10
6 and the output end 17 of the decompression pin 10 is pushed up against the tappet 18 in contact with the cam 3 by the tension of the spring 14, and the decompression position A where the output end 17 of the decompression pin 10 is pushed up from the tappet 18 by the centrifugal force of the centrifugal weight 12. In an automatic decompression device at the time of starting an engine configured to be able to be switched to a release position B,
The centrifugal weight 12 is formed of a rolling element, and this rolling element type centrifugal weight 12
A transfer hole 20 is formed in the cam gear 5 in an inclined shape such that the distance from the gear rotation center C continuously changes along the gear rotation direction R, and the rolling element-shaped centrifugal weight 12 can be transferred reciprocally in the transfer hole 20. An automatic engine start-up device characterized by being inserted. 2. The inclination angle θ of the rolling hole 20 with respect to the gear rotational force direction R is such that the large part 20a on the side closer to the gear rotation center C has a gentle angle θ1, and the large part 20b on the far side has a steep angle θ2. An automatic engine start-up decompression device as set forth in claim 1 of the utility model registration claim, characterized in that it is configured as follows. 3. The automatic engine start-up decompression device as set forth in claim 2 of the utility model registration, characterized in that the rolling hole 20 is formed in a curved shape.