JPH03114544U

JPH03114544U -

Info

Publication number: JPH03114544U
Application number: JP2472990U
Authority: JP
Priority date: 1990-03-12
Filing date: 1990-03-12
Publication date: 1991-11-25

Description

[Brief explanation of drawings]

第１図は本考案になる気化器の絞り弁リターン
スプリングの一実施例を示す側面図であり、絞り
弁のアイドリング運転状態を示す。第２図は絞り
弁軸、絞り弁レバー５の係止部５Ａの中心が絞り
弁の開度が変化した状態における位置の変化を示
す線図、第３図は絞り弁の開度とテンシヨンスプ
リングのバネ荷重との関係を示す線図、第４図は
絞り弁の開度と絞り弁軸の軸心と係止部の中心と
の距離の関係を示す線図、第５図は絞り弁の開度
と絞り弁レバーに対する回転力との関係を示す線
図である。３……絞り弁、５……絞り弁レバー、４……絞
り弁軸、５Ａ……係止部、６Ａ……固定端、７…
…テンシヨンスプリング、Ａ……固定端６Ａの略
中心、Ｂ……係止部５Ａの略中心、Ｃ……絞り弁
軸４の中心。 FIG. 1 is a side view showing an embodiment of a throttle valve return spring of a carburetor according to the present invention, and shows an idling operating state of the throttle valve. Figure 2 is a diagram showing the change in position of the throttle valve shaft and the center of the locking part 5A of the throttle valve lever 5 as the throttle valve opening changes, and Figure 3 is a diagram showing the throttle valve opening and tension. A diagram showing the relationship between the spring load of the spring, Figure 4 is a diagram showing the relationship between the opening degree of the throttle valve and the distance between the axis of the throttle valve shaft and the center of the locking part, and Figure 5 is a diagram showing the relationship between the throttle valve opening and the center of the locking part. FIG. 3 is a diagram showing the relationship between the opening degree of the throttle valve lever and the rotational force applied to the throttle valve lever. 3... Throttle valve, 5... Throttle valve lever, 4... Throttle valve shaft, 5A... Locking part, 6A... Fixed end, 7...
...Tension spring, A...Approximate center of fixed end 6A, B...Approximate center of locking portion 5A, C... Center of throttle valve shaft 4.

Claims

[Claims for Utility Model Registration] A throttle valve shaft 4 that is integrally connected to a throttle valve 3 that controls the opening and closing of an intake passage 2 passing through the carburetor body 1 and is rotatably supported by the carburetor body 1; a throttle valve lever 5 attached to the end of the throttle valve shaft 4 protruding from the device body 1; and a tension spring 7 that applies an elastic force to the throttle valve lever 5 in the closing direction of the throttle valve 3. ;
One end 7A of the tension spring 7 is locked to a fixed end 6A provided on the carburetor main body 1 or the float chamber main body 6, and the other end 7 of the tension spring 7
In the throttle valve return spring of the carburetor, in which B is locked to the locking part 5A of the throttle valve lever 5, when the throttle valve 3 is at the idling opening position, approximately the center A of the fixed end 6A of the tension spring 7 and the tension A line segment A-B connecting approximately the center B of the locking portion 5A of the spring 7 with respect to the throttle valve lever 5, and a line segment A-B connecting approximately the center B of the locking portion 5A of the tension spring 7 with respect to the throttle valve lever 5 and the approximate center B of the locking portion 5A of the tension spring 7 with respect to the throttle valve lever 5 and the center B of the locking portion 5A of the tension spring 7 with respect to the throttle valve lever 5. The line segment B-C connecting the center C is made substantially orthogonal, while the throttle valve 3
When the opening degree is high, the approximate center B of the locking portion 5A of the tension spring 7 with respect to the throttle valve lever 5 is aligned with the approximate center A of the fixed end 6A of the tension spring 7.
The tension valve lever 5 of the tension spring 7 is divided into two by a line segment A-C connecting the center C of the throttle valve shaft 4.
The throttle valve return spring of the carburetor is disposed within a range on one side that includes approximately the center B of the locking portion 5A.