JPH0319438U

JPH0319438U -

Info

Publication number: JPH0319438U
Application number: JP7896489U
Authority: JP
Priority date: 1989-07-04
Filing date: 1989-07-04
Publication date: 1991-02-26

Description

[Brief explanation of drawings]

第１図ないし第３図は本考案の実施例を示し、
第１図はスロツトルバルブ装置の要部を拡大して
示す縦断面図、第２図は弁板の形状を示す説明図
、第３図はスロツトルチヤンバと弁板とのクリア
ランスを示す特性線図、第４図および第５図は従
来技術を示し、第４図はスロツトルバルブ装置の
縦断面図、第５図は第４図中の要部拡大図である
。１……スロツトルボデイ、２，３……スロツト
ルチヤンバ、５……弁軸、６，７……軸受、１１
，２１……弁板、２１Ａ……薄肉部、２１Ｂ……
切欠き部、Ｄ……穴径、ｄ……外径、ｌ_１……変
位量。 1 to 3 show embodiments of the present invention,
Fig. 1 is an enlarged vertical cross-sectional view of the main parts of the throttle valve device, Fig. 2 is an explanatory diagram showing the shape of the valve plate, and Fig. 3 is a characteristic showing the clearance between the throttle chamber and the valve plate. 4 and 5 show the prior art, FIG. 4 is a longitudinal sectional view of the throttle valve device, and FIG. 5 is an enlarged view of the main part in FIG. 4. 1... Throttle body, 2, 3... Throttle chamber, 5... Valve stem, 6, 7... Bearing, 11
, 21... Valve plate, 21A... Thin wall part, 21B...
Notch, D...hole diameter, d...outer diameter, _l1 ...displacement amount.

Claims

[Scope of utility model registration request]

a throttle body in which at least two throttle chambers are formed; a valve shaft that diametrically passes through each throttle chamber of the throttle body and is rotatably provided on the throttle body; and one end of the valve shaft. a first valve located on the side between the valve shaft and the throttle body, with one end of the valve shaft positioned in the axial direction with respect to the throttle body;
a bearing located on the other end of the valve shaft, disposed between the valve shaft and the throttle body, and supporting the other end of the valve shaft so as to be slidable in the axial direction with respect to the throttle body. two bearings, and first and second bearings fixed to the valve shaft and rotating together with the valve shaft to open and close each throttle chamber of the throttle body.
In the throttle valve device, of the valve plates, at least the second valve plate located closer to the second bearing side has both end portions in the axial direction with respect to the valve shaft shaped into a predetermined circular arc. A throttle valve device characterized by a crescent-shaped notch along the length.