JPS60170009U

JPS60170009U - Automatic decompression device when starting the engine

Info

Publication number: JPS60170009U
Application number: JP5921484U
Authority: JP
Inventors: 中野　啓一; 谷　義雄
Original assignee: 株式会社クボタ
Priority date: 1984-04-20
Filing date: 1984-04-20
Publication date: 1985-11-11
Also published as: JPH0234403Y2

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図乃至第４図は本考案の実施例を示すもので、第１
図はカムギヤ周辺の要部縦断面正面図、第２図は第１図
における■−■線断面図、第３図及び第４図は各々遠心
錘の回動状態を示す略示正面図、第５図及び第６図は各
々従来例を示す第２図相当図である。１・・・動弁装置、２・・・カム軸、３・・・カム、５
・・・支−持具、６・・・デコンプ用カム面部分、“７
・・・デコンプ解除用カム面部分、８・・・ピン案内孔
、１０・・・デコンプピン、１２・・・遠心錘、１５・
・・１２の出力端、１６・・・１０の入力端、１７・・
・１０の出力端、１８・・・タペット、′３４・・・支
点ピン、Ａ・・・デコンプ位置、Ｂ・・・デコンプ解除
位置、Ｃ・−・球心方向、Ｄ・・・２の軸心、Ｅ・・・
エンジン、Ｆ・・・遠心力。Figures 1 to 4 show embodiments of the present invention.
The figure is a vertical cross-sectional front view of the main part around the cam gear, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, Figures 3 and 4 are schematic front views showing the rotating state of the centrifugal weight, 5 and 6 are views corresponding to FIG. 2, each showing a conventional example. 1... Valve train, 2... Camshaft, 3... Cam, 5
... Supporting tool, 6 ... Cam surface part for decompression, "7
...Cam surface part for decompression release, 8...Pin guide hole, 10...Decompression pin, 12...Centrifugal weight, 15.
...12 output end, 16...10 input end, 17...
・Output end of 10, 18... Tappet, '34... Fulcrum pin, A... Decompression position, B... Decompression release position, C... Ball center direction, D... Axis of 2 Heart, E...
Engine, F...Centrifugal force.

Claims

[Scope of utility model registration request]

゛ A support 5 is attached to the camshaft 2 of the valve train 1 of the engine E.
The centrifugal weight 12 is pivoted to the support 5 using a fulcrum pin 34 so as to be centrifugally swingable, and the spring 14 is used to press the centrifugal weight 12 in the centripetal direction C. , the decompression pin 10 passes through the pin guide hole 8 so as to be slidable forward and backward, and the input end 16 of the decompression pin 10 is brought into contact with the output end 15 of the centrifugal weight 12, and the output end 17 of the decompression pin 10 is inserted.
There is a decompression position A in which the tension of the spring 14 pushes up the tappet 18 in contact with the cam 3 of the camshaft 2, and a decompression position in which the centrifugal force F of the centrifugal weight 12 overcomes the tension in the spring 14 and does not push up the tappet 18. This automatic decompression device at the time of starting an engine is configured to be able to be switched to a release position B, and the fulcrum pin 34 of the centrifugal weight 12 is located on the output end 17 side of the decompression pin 10 when viewed from the axis of the camshaft 2. The input end 16 of the decompression pin 10 is formed into a convex partial spherical shape, and the decompression cam surface portion 6 of the output end 15 of the centrifugal weight 12 that pushes up the decompression pin 10 to the decompression position A is connected to the fulcrum pin 34 and the decompression pin. The decompression release cam surface portion 7 is formed into an oblique plane substantially perpendicular to the virtual straight line H connecting the decompression pin 10 to the input end 16 of the decompression pin 10 to the decompression release position B. An automatic decombination device at the time of starting an engine, characterized in that a flat inclined surface is formed to move away from the axis of a camshaft 2.