JPS621392Y2

JPS621392Y2 -

Info

Publication number: JPS621392Y2
Application number: JP1981078686U
Authority: JP
Priority date: 1981-05-28
Filing date: 1981-05-28
Publication date: 1987-01-13
Also published as: JPS57193032U

Description

【考案の詳細な説明】本考案は排気ブレーキバルブに関するものであ
る。本考案を第１，２図に示す実施例にもとづい
て説明すると、１は排気管２の一部分をなすと共
に内部に排気ブレーキバルブの弁体３（以下バル
ブという）を設けたバルブボデー、４はマフラ
ー、５はバルブシヤフト、６はブツシユ、７はラ
ビリンス効果をもたせたシールリング、８はバル
ブボデー１に固定されているプレートで、バルブ
シヤフト５を貫通させたバルブボデー１の軸受孔
部９を外側から閉塞している。１０はプレート８
に固定されたシリンダ装置で、ロツド１１を介し
てアーム１２に連結されている。またアーム１２
はバルブシヤフト５と一体回動できるように結合
され、シリンダ装置１０の作動によつてバルブ３
を回動変位させることができる。１３はプレート
８に固設したカツプ状の第１カバー、１４はアー
ム１２に固設した第１カバー１３と同様のカツプ
状の第２カバーであつて、第１、第２両カバー１
３，１４で内部空間に迷路が形成されるようにし
ている。１５はアーム１２の回動を規制するスト
ツパゴム、１６はパツキンである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust brake valve. The present invention will be explained based on the embodiment shown in FIGS. 1 and 2. 1 is a valve body that forms a part of an exhaust pipe 2 and has a valve body 3 (hereinafter referred to as a valve) of an exhaust brake valve inside; A muffler, 5 is a valve shaft, 6 is a bush, 7 is a seal ring with a labyrinth effect, 8 is a plate fixed to the valve body 1, and the bearing hole 9 of the valve body 1 is inserted through the valve shaft 5. It is blocked from the outside. 10 is plate 8
A cylinder device is fixed to the arm 12 and is connected to the arm 12 via a rod 11. Also arm 12
is connected to the valve shaft 5 so as to be able to rotate integrally with the valve shaft 5, and the valve 3 is rotated by the operation of the cylinder device 10.
can be rotated and displaced. 13 is a cup-shaped first cover fixed to the plate 8; 14 is a cup-shaped second cover similar to the first cover 13 fixed to the arm 12;
3 and 14, a maze is formed in the internal space. 15 is a stopper rubber for regulating the rotation of the arm 12, and 16 is a gasket.

本実施例は上記構成を有するためシリンダ装置
１０のロツド１１の伸縮作動によつて、アーム１
２が矢印Ａ方向に回動変位すると、バルブ３はバ
ルブボデー１内の排気流通量を調整して排気ブレ
ーキ機能を発揮する。そして車両走行時にタイヤ
で飛散された泥水が第１カバー１３に付着しても
第１カバ１３はプレート８のシヤフト挿通孔８′
を閉塞しており、また第１、第２両カバ１３，１
４間には迷路の如き空間が形成されているため軸
受孔部９に泥水が浸入することがなく、このため
バルブボデー１の軸受孔部９内周が錆びてブツシ
ユ６外周との間に存していた微少隙間を埋めて両
者の周面が遊合状態から嵌合状態になるというこ
とはなく、したがつて、排気熱によるブツシユ６
の膨張を吸収できるのでバルブシヤフト５とブツ
シユ６とが固着状態とはならず、バルブシヤフト
５は軸受孔部９内で円滑に回動することができ、
排気ブレーキ操作に支障をきたさない作用効果を
有する。 Since this embodiment has the above-mentioned configuration, the arm 1 is
When valve 2 is rotationally displaced in the direction of arrow A, valve 3 adjusts the flow rate of exhaust gas within valve body 1 and exhibits an exhaust brake function. Even if muddy water splashed by the tires when the vehicle is running adheres to the first cover 13, the first cover 13 is inserted into the shaft insertion hole 8' of the plate 8.
, and both the first and second covers 13,1
Since a labyrinth-like space is formed between the bushings 6 and 4, muddy water does not enter the bearing hole 9. This prevents the inner periphery of the bearing hole 9 of the valve body 1 from rusting. There is no possibility that the peripheral surfaces of the two will change from the loose state to the fitted state by filling the small gap that had been caused by the exhaust heat.
Since the expansion of the valve shaft 5 and the bush 6 can be absorbed, the valve shaft 5 and the bush 6 are not stuck together, and the valve shaft 5 can rotate smoothly within the bearing hole 9.
It has the effect of not interfering with exhaust brake operation.

従来装置においては、上記第１、第２カバー１
３，１４が設けられていなかつたために、プレー
ト８のシヤフト挿通孔８′を通じて軸受孔部９内
に泥水が入りやすく、そのため同孔部９内周が錆
びてブツシユ６外周との間の隙間がなくなる。そ
してこの状態で排気熱によるブツシユ６の熱膨張
によつてバルブシヤフト５が回動できなくなつて
バルブ３の操作を不可能にしてしまうという欠点
があつたが、本考案によればかかる従来装置の不
具合を解消することができるものである。 In the conventional device, the first and second covers 1
3 and 14 were not provided, muddy water easily entered the bearing hole 9 through the shaft insertion hole 8' of the plate 8, and as a result, the inner periphery of the hole 9 rusted and the gap between it and the outer periphery of the bush 6 increased. It disappears. In this state, the valve shaft 5 becomes unable to rotate due to thermal expansion of the bush 6 due to exhaust heat, making it impossible to operate the valve 3, which is a drawback.However, according to the present invention, such a conventional device It is possible to solve the problem of.

[Brief explanation of the drawing]

第１図は本考案の実施例における側面図、第２
図は第１図の−線における矢視拡大断面図で
ある。１：バルブボデー、３：バルブ、５：バルブシ
ヤフト、９：軸受孔部、１３：第１カバー、１
４：第２カバー。 Figure 1 is a side view of an embodiment of the present invention;
The figure is an enlarged sectional view taken along the line - in FIG. 1. 1: Valve body, 3: Valve, 5: Valve shaft, 9: Bearing hole, 13: First cover, 1
4: Second cover.

Claims

[Scope of utility model registration request]

An exhaust pipe with an opening forming a bearing in the peripheral wall, a valve body disposed within the exhaust pipe to make the passage cross-sectional area of the exhaust pipe variable, and one end of the valve body fixed to the valve body in order to open and close the valve body. a valve shaft that is inserted into the opening and whose other end is fixed to an arm that drives the valve body; and a plate through which the valve shaft is inserted and which closes an end surface of the opening from the outside; a cup-shaped first cover having a side wall formed around the valve shaft and having a bottom fixed to the plate; a cup-shaped first cover having a side wall formed around the valve shaft and having a bottom fixed to the arm; An exhaust brake valve comprising a cup-shaped second cover provided oppositely to each other, the first cover and the second cover being arranged so that their respective side walls overlap.