JPS60124511U

JPS60124511U - Automatic decompression device when starting the engine

Info

Publication number: JPS60124511U
Application number: JP709884U
Authority: JP
Inventors: 中野　啓一; 梅田　達敏
Original assignee: 株式会社クボタ
Priority date: 1984-01-20
Filing date: 1984-01-20
Publication date: 1985-08-22
Also published as: JPH0144725Y2

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２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正面図、第２図は第１図に
おける■−■線断面図、第３図は先行考案を示す第１図
相当図、第４図は第３図におけるＩＶ−ＴＶ線断図、第
５図は従来例を示す第１図相当図、第６図は第５図にお
けるＶＩ−ＶＩ線断面図である。１・・・・・・動弁機構、２・・・・・・カム軸、３・
・・・・・カム、４・・・・・・鍔、５・・・・・・カ
ムギヤ、６・・・・・・４の端面、７・・・・・・３と
４の間の軸部分、８・・・・・・案内孔、１０・・・・
・・デコンプピン、１１・・・・・・５の側面、１２・
・・・・・遠心錘、１４・・・・・・デコンプ用バネ、
１５・・・・・・１２の出力部、１６・・・・・・１０
の入力端部、１７・・・・・・１０の出力端部、１８・
・・・・・タペット、２０・・・・・・５の突出内部、
２１・・・・・・２０の内周面、２２・・・・・・４の
外周面、Ａ・・・・・・デコンプ位置、Ｂ・・・・・・
デコンプ解除位置、Ｃ・・・・・・１０の退行時の重心
、Ｄ・・・・・・２の軸心、Ｅａ６６６６６エンジン。Figures 1 and 2 show an embodiment of the present invention.
The figure is a longitudinal sectional front view of the main parts around the cam gear, Figure 2 is a cross-sectional view taken along the line ■-■ in Figure 1, Figure 3 is a view equivalent to Figure 1 showing the previous design, and Figure 4 is the IV-- in Figure 3. 5 is a diagram corresponding to FIG. 1 showing a conventional example, and FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5. 1... Valve mechanism, 2... Camshaft, 3.
...cam, 4 ... tsuba, 5 ... cam gear, 6 ... end face of 4, 7 ... shaft between 3 and 4 Part, 8... Guide hole, 10...
... Decompression pin, 11 ... Side of 5, 12.
... Centrifugal weight, 14 ... Decompression spring,
15...12 output section, 16...10
input end of 17...10 output end of 18.
...Tappet, 20...Protruding inside of 5,
21... Inner peripheral surface of 20, 22... Outer peripheral surface of 4, A... Decompression position, B...
Decompression release position, C...10 center of gravity during regression, D...2 axis center, Ea66666 engine.

Claims

[Claims for Utility Model Registration] 1. A cam 3 and a collar 4 on a camshaft 2 of a valve train 1 of an engine E.
The cam gear 5 is fitted and fixed to the camshaft 2 by contacting the end surface 6 of the flange 4 on the opposite side from the cam 3, and the shaft portion 7 between the cam 3 and the flange 4 A decompression pin 10 is passed through the guide hole 8 in a transverse manner, and a decompression pin 10 is passed through the guide hole 8 so as to be able to freely move forward and backward. At the same time, a decompression spring 14 is also provided to press the centrifugal weight 12 toward the centripetal side. Automatic decompression at the time of engine startup configured to be able to switch between a decompression position A in which the tappet 18 in contact with the cam 3 is pushed up by the tension of the spring 14, and a decompression release position B in which the tappet 18 is moved away from the tappet 18 by the centrifugal force of the centrifugal weight 12. In the device, the inner circumference 20 of the outer periphery of the cam gear 5 is made to protrude toward the cam 3 side, the inner circumferential surface 21 of the protruding inner surface 20 is opposed to the outer circumferential surface 22 of the collar 4, and this protruding southern inner circumferential surface 21 and the outer circumference of the collar are The centrifugal weight 12 is inserted between the surface 22 and the movement of the centrifugal weight 12 toward the centrifugal side is received by the protruding southern inner circumferential surface 21,
It is configured so that the movement toward the centripetal side is received by the outer circumferential surface 22 of the collar, and the input end 16 of the decompression pin 10 is brought into contact with the output part 15 of the centrifugal weight 12 in a protruding state, and the input end 16 of the decompression pin 10 is made to protrude. An automatic decompression device at the time of starting an engine, characterized in that the centrifugal weight 12 is formed into a partially spherical shape, and the output portion 15 of the centrifugal weight 12 is formed linearly along its length. 2. Utility Model Registration Scope of Claims 1. The automatic decompression device at the time of starting an engine described in claim 1, in which the guide hole 8 of the decompression pin 10 is formed in an inclined shape. 3. In the automatic engine start-up decompression device described in claim 1 or 2 of the utility model registration claim, - the input end 16 of the decompression pin 10 is formed to have a larger diameter than other parts; The center of gravity C during retraction is biased toward the retraction side from the axis of the camshaft 2.