JP3308136B2 - Air distribution device for starting internal combustion engine - Google Patents
Air distribution device for starting internal combustion engineInfo
- Publication number
- JP3308136B2 JP3308136B2 JP25982795A JP25982795A JP3308136B2 JP 3308136 B2 JP3308136 B2 JP 3308136B2 JP 25982795 A JP25982795 A JP 25982795A JP 25982795 A JP25982795 A JP 25982795A JP 3308136 B2 JP3308136 B2 JP 3308136B2
- Authority
- JP
- Japan
- Prior art keywords
- rotary valve
- valve body
- air
- internal combustion
- combustion engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、空気圧源からデ
ィーゼルエンジン等の内燃機関のシリンダヘッド毎に設
けられた始動バルブに圧縮空気を順次分配する内燃機関
の起動用空気分配装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starting air distribution device for an internal combustion engine that sequentially distributes compressed air from an air pressure source to a starting valve provided for each cylinder head of an internal combustion engine such as a diesel engine.
【０００２】[0002]
【従来の技術】従来、内燃機関の起動用空気分配装置と
しては、図３に示すものがある。この起動用空気分配装
置は、軸受穴１０１aを有するハウジング１０１と、上
記ハウジング１０１の軸受穴１０１aにブッシュ１１０
を介して回転自在に支持された軸部１０２aとその軸部
１０２aの一端に形成された円板部１０２bとを有する回
転弁体１０２と、上記ハウジング１０１に固定され、回
転弁体１０２の円板部１０２bを覆うカバー１０５とを
備えている。上記回転弁体１０２の円板部１０２aとカ
バー１０５により空間１４０を形成している。そして、
上記空間１４０は、カバー１０５に形成された空気入口
１０５aと空気管１２０とを介して起動用空気槽に連通
している。また、上記カム軸１０３,中間継手１０４お
よび回転弁体１０２の軸部１０２aで形成されたオルダ
ム継手によって、カム軸１０３と回転弁体１０２の軸部
１０２aを連結している。上記回転弁体１０２の円板部
１０２bに導入穴１２３を形成すると共に、ハウジング
１０１に、回転弁体１０２の軸を中心に周方向に所定の
間隔をあけてシリンダ数の空気通路１２１(図３では１
つのみを示す)を形成している。2. Description of the Related Art FIG. 3 shows a conventional air distribution device for starting an internal combustion engine. This starting air distribution device includes a housing 101 having a bearing hole 101a, and a bush 110 in a bearing hole 101a of the housing 101.
A rotary valve body 102 having a shaft portion 102a rotatably supported via a shaft and a disk portion 102b formed at one end of the shaft portion 102a, and a disk of the rotary valve body 102 fixed to the housing 101. And a cover 105 that covers the portion 102b. A space 140 is formed by the disk portion 102a of the rotary valve body 102 and the cover 105. And
The space 140 communicates with a starting air tank via an air inlet 105 a formed in the cover 105 and an air pipe 120. Further, the camshaft 103 and the shaft portion 102a of the rotary valve body 102 are connected by an Oldham joint formed by the camshaft 103, the intermediate joint 104, and the shaft portion 102a of the rotary valve body 102. An inlet hole 123 is formed in the disk portion 102b of the rotary valve body 102, and the number of air passages 121 of the number of cylinders (see FIG. Then 1
Only one is shown).
【０００３】上記起動用空気分配装置において、カム軸
１０３の回転に伴って、回転弁体１０２が回転し、その
回転弁体１０２の円板部１０２bの導入穴１２３が、ハ
ウジング１０１のシリンダ数の空気通路１２１のうちの
１つと対向すると、その空気通路１２１と空間１４０が
連通する。そして、上記カバー１０５の空気入口１０５
a,空間１４０,回転弁体１０２の導入穴１２３およびハ
ウジング１０１の空気通路１２１を経て、内燃機関のシ
リンダヘッド毎に設けられた始動バルブに起動用空気槽
からの圧縮空気を供給する。こうして、上記回転弁体１
０２の回転に伴って、起動用空気槽から導かれた圧縮空
気を各始動バルブにサイクリックに供給して、始動バル
ブを順次開閉し、上記起動用空気槽からの圧縮空気を始
動バルブを介してシリンダ内に順次供給して、内燃機関
を着火速度に回転させる。In the starting air distribution device, the rotary valve 102 rotates with the rotation of the camshaft 103, and the introduction hole 123 of the disk portion 102b of the rotary valve 102 When facing one of the air passages 121, the air passage 121 and the space 140 communicate with each other. The air inlet 105 of the cover 105
Compressed air from a starting air tank is supplied to a starting valve provided for each cylinder head of the internal combustion engine through a, space 140, an introduction hole 123 of the rotary valve body 102, and an air passage 121 of the housing 101. Thus, the rotary valve 1
With the rotation of 02, the compressed air guided from the starting air tank is cyclically supplied to each starting valve, and the starting valves are sequentially opened and closed, and the compressed air from the starting air tank is supplied via the starting valve. To sequentially rotate the internal combustion engine to an ignition speed.
【０００４】ところで、上記内燃機関では機関回転測定
が義務付けられており、回転数を計測するのに、信頼性
が高く低価格であることから、一般に機械式回転計が用
いられている。この場合、上記カム軸１０３に駆動ギヤ
１３０(図３に示す)を取り付け、その駆動ギヤ１３０を
用いて、駆動装置により回転計出力軸を回転駆動する。[0004] By the way, in the above-mentioned internal combustion engine, measurement of the engine speed is obligatory, and a mechanical tachometer is generally used for measuring the number of revolutions because of high reliability and low cost. In this case, a driving gear 130 (shown in FIG. 3) is attached to the camshaft 103, and the output shaft of the tachometer is rotationally driven by a driving device using the driving gear 130.
【０００５】図４は上記起動用空気分配装置と駆動装置
１４０とを組み合わせた状態を示す模式図である。上記
駆動装置１４０は、カム軸１０３に取り付けられた駆動
ギヤ１３０に噛合する速度ギヤ１３１を介して、カム軸
１０３の回転を回転計出力軸１３２に伝達する。なお、
上記回転計出力軸１３２を、ケース１００に一端が固定
されたスリーブ１３４により軸受１３５を介して回転自
在に支持している。そして、上記駆動装置１４０の回転
計出力軸１３２を連結部１４１,フレキシブルケーブル
１４２を介して機械式回転計１４３に接続し、機械式回
転計１４３により回転数を計測する。FIG. 4 is a schematic view showing a state in which the starting air distribution device and the driving device 140 are combined. The drive device 140 transmits the rotation of the cam shaft 103 to the tachometer output shaft 132 via a speed gear 131 that meshes with a drive gear 130 attached to the cam shaft 103. In addition,
The tachometer output shaft 132 is rotatably supported via a bearing 135 by a sleeve 134 having one end fixed to the case 100. Then, the tachometer output shaft 132 of the driving device 140 is connected to the mechanical tachometer 143 via the connecting portion 141 and the flexible cable 142, and the rotational speed is measured by the mechanical tachometer 143.
【０００６】[0006]
【発明が解決しようとする課題】ところが、上記内燃機
関では、駆動ギヤ１３０および駆動装置１４０等を用い
て回転計用の出力を得るので、構造が複雑となり、部品
点数が増えてコスト高となる。また、メンテナンスを必
要とするという欠点がある。However, in the above-mentioned internal combustion engine, since the output for the tachometer is obtained by using the drive gear 130 and the drive device 140, the structure becomes complicated, the number of parts increases, and the cost increases. . Further, there is a disadvantage that maintenance is required.
【０００７】そこで、この発明の目的は、簡単な構造で
回転計用の出力を得ることができると共に、メンテナン
スが殆ど不要で安価な内燃機関の起動用空気分配装置を
提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive start-up air distribution device for an internal combustion engine which can obtain an output for a tachometer with a simple structure and requires almost no maintenance.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、請求項１の内燃機関の起動用空気分配装置は、空気
圧源からの圧縮空気をシリンダヘッド毎に設けられた始
動バルブに分配する内燃機関の起動用空気分配装置にお
いて、上記内燃機関のカム軸に一端が連結された回転弁
体を有し、上記回転弁体により上記空気圧源からの圧縮
空気を分配する空気分配弁と、上記空気分配弁の上記回
転弁体の他端に連結された回転計出力軸と、上記回転計
出力軸とその回転計出力軸の軸受部分との間から上記圧
縮空気が外部に漏れないようにするシール装置とを備え
たことを特徴としている。In order to achieve the above object, a starting air distribution device for an internal combustion engine according to the present invention distributes compressed air from an air pressure source to a starting valve provided for each cylinder head. An air distribution device for starting an engine, comprising: a rotary valve body having one end connected to a camshaft of the internal combustion engine; an air distribution valve for distributing compressed air from the air pressure source by the rotary valve body; A seal for preventing the compressed air from leaking outside from between the tachometer output shaft connected to the other end of the rotation valve body of the distribution valve and the bearing portion of the tachometer output shaft and the tachometer output shaft. And a device.
【０００９】上記請求項１の内燃機関の起動用空気分配
装置によれば、上記内燃機関の起動時に、上記内燃機関
のカム軸の回転に伴って空気分配弁の回転弁体が回転
し、空気圧源からの圧縮空気を各シリンダヘッドの始動
バルブに空気分配弁を介してサイクリックに供給する。
そして、上記各始動バルブを順次開閉して、空気圧源か
らの圧縮空気をその開いた始動バルブを介してシリンダ
内に供給し、ピストンを上下させて、内燃機関を起動の
ために着火速度に回転させる。上記空気分配弁の回転弁
体の他端に連結された回転計出力軸に回転計を接続する
ことによって、内燃機関の回転数を計測する。このと
き、上記シール装置により、空気圧源から回転弁体を経
て始動バルブのピストンに供給される圧縮空気が、回転
計出力軸とその回転計出力軸の軸受部分との間から外部
に漏れることがない。したがって、簡単な構造で回転計
用の出力を得ることができると共に、メンテナンスが殆
ど不要となり、安価な内燃機関の起動用空気分配装置を
実現できる。According to the first aspect of the present invention, when the internal combustion engine is started, the rotary valve element of the air distribution valve rotates with the rotation of the camshaft of the internal combustion engine. Compressed air from the source is cyclically supplied to the starting valve of each cylinder head via an air distribution valve.
Then, each of the start valves is sequentially opened and closed, compressed air from the air pressure source is supplied into the cylinder through the opened start valve, and the piston is moved up and down to rotate the internal combustion engine to the ignition speed for starting. Let it. The rotation speed of the internal combustion engine is measured by connecting a tachometer to a tachometer output shaft connected to the other end of the rotation valve body of the air distribution valve. At this time, the compressed air supplied to the piston of the starting valve from the air pressure source via the rotary valve body by the sealing device may leak outside from between the tachometer output shaft and the bearing portion of the tachometer output shaft. Absent. Therefore, an output for a tachometer can be obtained with a simple structure, and almost no maintenance is required, and an inexpensive starting air distribution device for an internal combustion engine can be realized.
【００１０】また、請求項２の内燃機関の起動用空気分
配装置は、請求項１の内燃機関の起動用空気分配装置に
おいて、上記シール装置は、上記回転弁体と上記回転計
出力軸との間に、上記回転弁体と上記回転計出力軸とを
連結するように、かつ、軸方向に移動可能に配置され、
上記回転弁体側につばを有するつば付中間連結軸と、上
記つば付中間連結軸に軸方向に移動可能に外嵌すると共
に、上記回転弁体側の一端につばを有するつば付ブッシ
ュとを備え、上記つば付ブッシュのつばが上記軸受部分
の内側端面と上記つば付中間連結軸のつばとの間に密に
挟まれてシールするようにしたことを特徴としている。According to a second aspect of the present invention, there is provided a starting air distribution device for an internal combustion engine, wherein the seal device is provided between the rotary valve body and the tachometer output shaft. In between, the rotary valve element and the tachometer output shaft are connected to each other, and are arranged so as to be movable in the axial direction,
A collar-attached intermediate connecting shaft having a collar on the rotary valve body side, and a flanged bush having a collar at one end on the rotary valve body side, which is fitted externally movably in the axial direction on the collar-attached intermediate connection shaft, The collar of the collar bush is tightly sandwiched and sealed between the inner end face of the bearing portion and the collar of the collar connection shaft.
【００１１】上記請求項２の内燃機関の起動用空気分配
装置によれば、上記内燃機関の起動時に、上記空気圧源
から空気分配弁に供給された圧縮空気によって、上記シ
ール装置のつば付中間連結軸を軸方向に回転弁体側と反
対の側に付勢して移動させ、上記つば付ブッシュのつば
を上記軸受部分の内側端面とつば付中間連結軸のつばと
の間に密に挟むので、圧縮空気が外部に漏れないように
シールできる。また、起動運転が終了した後の通常運転
では、空気圧源からの圧縮空気を空気分配弁に供給しな
いので、上記つば付ブッシュは、つば付中間連結軸のつ
ばと軸受部分の内側端面との間に挟まれず、すべり軸受
の機能を十分に果たすことができる。According to the air distribution device for starting an internal combustion engine of the second aspect, when the internal combustion engine is started, the compressed air supplied to the air distribution valve from the air pressure source causes the flanged intermediate connection of the sealing device. The shaft is biased and moved in the axial direction to the side opposite to the rotary valve body side, and the flange of the flanged bush is tightly sandwiched between the inner end surface of the bearing portion and the flange of the flanged intermediate connection shaft. Sealing can be performed so that compressed air does not leak to the outside. Further, in the normal operation after the start-up operation is completed, the compressed air from the air pressure source is not supplied to the air distribution valve, so that the flanged bush is provided between the flange of the flanged intermediate connection shaft and the inner end face of the bearing portion. The function of the sliding bearing can be sufficiently achieved without being sandwiched between the bearings.
【００１２】[0012]
【発明の実施の形態】以下、この発明の内燃機関の起動
用空気分配装置を図示の実施の形態により詳細に説明す
る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of an internal combustion engine according to the present invention.
【００１３】図１はこの発明の実施の形態の内燃機関と
してのディーゼルエンジンの起動用空気分配装置の断面
を示している。この起動用空気分配装置は、軸受穴１a
を有するハウジング１と、ハウジング１の軸受穴１a内
にブッシュ１０を介して回転自在に支持された軸部２a
とその軸部２aの一端側に形成された円板部２bとを有す
る回転弁体２と、上記ハウジング１に複数のボルト３１
(図１では１つのみを示す)により固定され、回転弁体２
の円板部２bを覆うカバー５とを備えている。上記回転
弁体２の軸部２aと中間継手４およびカム軸３でオルダ
ム継手を構成して、回転弁体２の軸部２aとカム軸３を
連結している。また、上記回転弁体２の円板部２bとカ
バー５により空間４０を形成している。上記カバー５に
設けられた空気入口５aに接続金具３０を介して空気管
２０の一端を接続している。上記空気管２０の他端に空
気圧源としての起動用空気槽(図示せず)を接続して、そ
の起動用空気槽を上記空間４０に連通している。上記カ
バー５に回転弁体２の軸方向に貫通する貫通穴５bを形
成し、その貫通穴５bに円筒部材６の一端を螺合して固
定している。なお、上記ハウジング１,回転弁体２,カバ
ー５およびブッシュ１０で空気分配弁を構成している。FIG. 1 shows a cross section of a starting air distribution device for a diesel engine as an internal combustion engine according to an embodiment of the present invention. This starting air distribution device has a bearing hole 1a.
And a shaft portion 2a rotatably supported via a bush 10 in a bearing hole 1a of the housing 1.
A rotary valve body 2 having a shaft portion 2a and a disk portion 2b formed on one end side of the shaft portion 2a;
(Only one is shown in FIG. 1).
And a cover 5 that covers the disk portion 2b. An Oldham coupling is formed by the shaft portion 2a of the rotary valve body 2, the intermediate joint 4 and the cam shaft 3, and the shaft portion 2a of the rotary valve body 2 and the cam shaft 3 are connected. Further, a space 40 is formed by the disc portion 2 b of the rotary valve body 2 and the cover 5. One end of the air pipe 20 is connected to an air inlet 5 a provided in the cover 5 via a connection fitting 30. A starting air tank (not shown) as an air pressure source is connected to the other end of the air pipe 20, and the starting air tank communicates with the space 40. A through hole 5b penetrating the cover 5 in the axial direction of the rotary valve body 2 is formed, and one end of the cylindrical member 6 is screwed and fixed to the through hole 5b. The housing 1, the rotary valve body 2, the cover 5 and the bush 10 constitute an air distribution valve.
【００１４】また、上記回転弁体２の円板部２bの周辺
部に、軸方向に貫通する導入穴２４を形成すると共に、
その回転弁体２が回転したときの導入穴２４の円形軌跡
に対応するように、上記ハウジング１に周方向に所定の
間隔をあけてシリンダ数の空気通路２１(図１では１つ
のみを示す)を形成している。上記回転弁体２の回転に
伴って、ハウジング１のシリンダ数の空気通路２１のう
ちの１つと回転弁体の円板部２bの導入穴２４とが対向
すると、その空気通路２１と空間４０とが連通する。An introduction hole 24 penetrating in the axial direction is formed in the periphery of the disk portion 2b of the rotary valve body 2, and
In order to correspond to the circular locus of the introduction hole 24 when the rotary valve body 2 rotates, a predetermined number of cylinders of air passages 21 (only one is shown in FIG. ) Is formed. When one of the air passages 21 of the number of cylinders of the housing 1 and the introduction hole 24 of the disk portion 2b of the rotary valve body face with the rotation of the rotary valve body 2, the air passage 21 and the space 40 Communicate.
【００１５】図２は図１の要部拡大図を示しており、円
筒部材６は、内周にカバー５側から大径部６aと小径部
６bを有している。上記円筒部材６の内周に、回転弁体
２側につば１２aを有するつば付中間連結軸１２を軸方
向に移動可能に配置し、そのつば付中間連結軸１２を、
回転弁体２側の一端につば１３aを有するつば付ブッシ
ュ１３を介して円筒部材６により回転自在に支持してい
る。上記つば付ブッシュ１３には、オイルを含浸してい
る。また、上記円筒部材６の内周の大径部６a側に環状
ストッパー１８を固定し、つば付中間連結軸１２が軸方
向に回転弁体２側に移動するとき、つば付中間連結軸１
２のつば１２aが当接して、それよりつば付中間連結軸
１２が回転弁体２側に移動しないようにしている。な
お、上記回転弁体２の円板部２bと中間継手１１および
つば付中間連結軸１２でオルダム継手を構成して、回転
弁体２の軸部２aとつば付中間連結軸１２を連結してい
る。また、上記つば付中間連結軸１２とつば付ブッシュ
１３でシール装置を構成している。FIG. 2 is an enlarged view of a main part of FIG. 1. The cylindrical member 6 has a large diameter portion 6a and a small diameter portion 6b on the inner periphery from the cover 5 side. On the inner periphery of the cylindrical member 6, a flanged intermediate connection shaft 12 having a flange 12a on the rotary valve body 2 side is disposed so as to be movable in the axial direction.
It is rotatably supported by the cylindrical member 6 via a flanged bush 13 having a flange 13a at one end on the rotary valve body 2 side. The collar bush 13 is impregnated with oil. Further, an annular stopper 18 is fixed to the inner peripheral large-diameter portion 6a side of the cylindrical member 6, and when the flanged intermediate connection shaft 12 moves in the axial direction toward the rotary valve body 2, the flanged intermediate connection shaft 1 is moved.
The two flanges 12a are in contact with each other so that the flanged intermediate connecting shaft 12 does not move toward the rotary valve body 2. In addition, an Oldham coupling is constituted by the disc portion 2b of the rotary valve body 2, the intermediate joint 11 and the intermediate connection shaft 12 with a flange, and the shaft portion 2a of the rotary valve body 2 is connected to the intermediate connection shaft 12 with a flange. I have. Further, the sealing device is constituted by the collared intermediate connecting shaft 12 and the collared bush 13.
【００１６】また、図１において、上記つば付中間連結
軸１２の回転弁体２側と反対の側の一端に回転計出力軸
１４を接続している。そして、上記回転計出力軸１４
に、円筒部材６にナット１６により固定された連結部１
５を介してフレキシブルケーブル１７の一端を接続し、
そのフレキシブルケーブル１７の他端に機械式回転計
(図示せず)を接続している。In FIG. 1, a tachometer output shaft 14 is connected to one end of the flanged intermediate connection shaft 12 on the side opposite to the rotary valve body 2 side. And the tachometer output shaft 14
The connecting portion 1 fixed to the cylindrical member 6 by a nut 16
5, one end of the flexible cable 17 is connected,
At the other end of the flexible cable 17, a mechanical tachometer
(Not shown).
【００１７】上記構造の起動用空気分配装置において、
図２に示すように、図示しない起動用空気槽からの圧縮
空気が空気入口５aを介して空間４０に導かれ、空間４
０内が高圧となって、外気と空間４０との間に圧力差が
生じる。その圧力差によって、つば付中間連結軸１２を
矢印Ｒの方向に押すことによって、つば付ブッシュ１３
のつば１３aを円筒部材６の段部６cとつば付中間連結軸
１２のつば１２aとの間に密に挟む。したがって、上記
つば付中間連結軸１２とつば付ブッシュ１３で構成され
るシール装置によって、空間４０内の圧縮空気が外部に
漏れないようにシールする。なお、上記シール装置のシ
ール機能を高めるため、回転弁体２の軸部２a,中間継手
１１およびつば付中間連結軸１２で構成されるオルダム
継手によって、軸心振れを吸収している。In the starting air distribution device having the above structure,
As shown in FIG. 2, compressed air from a starting air tank (not shown) is guided to the space 40 through the air inlet 5a, and
The inside of 0 becomes high pressure, and a pressure difference occurs between the outside air and the space 40. Due to the pressure difference, the collared bush 13 is pushed by pushing the collared intermediate connection shaft 12 in the direction of arrow R.
The flange 13a is densely sandwiched between the step 6c of the cylindrical member 6 and the collar 12a of the flanged intermediate connection shaft 12. Therefore, the sealing device including the flanged intermediate connecting shaft 12 and the flanged bush 13 seals the compressed air in the space 40 so as not to leak outside. In order to enhance the sealing function of the sealing device, the axial center run-out is absorbed by an Oldham coupling composed of the shaft portion 2a of the rotary valve body 2, the intermediate coupling 11, and the flanged intermediate connection shaft 12.
【００１８】そして、図１において、上記回転弁体２の
回転に伴って、回転弁体２の円板部２bの導入穴２４が
ハウジング１のシリンダ数の空気通路２１の１つに対向
すると、図示しない起動用空気槽からの圧縮空気が、空
気管２０,カバー５の空気入口５a,空間４０,回転弁体２
の導入穴２４およびハウジング１の空気通路２１を経
て、シリンダヘッド(図示せず)毎に設けられた始動バル
ブ(図示せず)のうちの１つに導かれる。こうして、上記
回転弁体２の回転に伴って、各始動バルブがサイクリッ
クに開閉し、その開いた始動バルブを介して起動用空気
槽からの圧縮空気をシリンダ内に送り込み、順次ピスト
ンを上下させて、ディーゼルエンジンを着火速度に回転
させる。In FIG. 1, when the introduction hole 24 of the disc portion 2b of the rotary valve body 2 faces one of the air passages 21 of the number of cylinders of the housing 1 with the rotation of the rotary valve body 2, Compressed air from a starting air tank (not shown) is supplied to the air pipe 20, the air inlet 5a of the cover 5, the space 40, and the rotary valve body 2.
Through the inlet hole 24 and the air passage 21 of the housing 1 to one of the starting valves (not shown) provided for each cylinder head (not shown). In this way, with the rotation of the rotary valve body 2, each start valve opens and closes cyclically, and compressed air from the start air tank is sent into the cylinder via the opened start valve to sequentially move the piston up and down. To rotate the diesel engine to the ignition speed.
【００１９】また、上記カム軸３の回転に伴って、中間
継手４,回転弁体２および中間継手１１を介してつば付
中間連結軸１２が回転する。そして、上記つば付中間連
結軸１２の回転に伴って、回転計出力軸１４,連結部１
５を介してフレキシブルケーブル１７が回転し、そのフ
レキシブルケーブル１７に接続された機械式回転計(図
示せず)はエンジンの回転数を計測する。Further, with the rotation of the camshaft 3, the flanged intermediate connection shaft 12 rotates via the intermediate joint 4, the rotary valve body 2 and the intermediate joint 11. Then, with the rotation of the collar-attached intermediate connecting shaft 12, the tachometer output shaft 14, the connecting portion 1
The flexible cable 17 is rotated via 5 and a mechanical tachometer (not shown) connected to the flexible cable 17 measures the number of revolutions of the engine.
【００２０】このように、駆動ギヤおよび駆動装置等を
別に用いることなく、簡単な構造で起動用空気分配装置
に回転計用出力軸を備えて、起動用空気分配装置と回転
計用出力軸の駆動装置とを一体化できると共に、メンテ
ナンスが殆ど不要で安価な内燃機関の起動用空気分配装
置を提供することができる。As described above, the starting air distribution device is provided with the output shaft for the tachometer with a simple structure without separately using the driving gear and the driving device. It is possible to provide an inexpensive start-up air distribution device for an internal combustion engine that can be integrated with a drive device and requires little maintenance.
【００２１】また、起動時に、起動用空気槽から供給さ
れた圧縮空気によって、つば付中間連結軸１２を軸方向
に回転弁体２側と反対の側に付勢して移動させ、つば付
ブッシュ１３のつば１３aを円筒部材６の内側端面とし
ての段部６cとつば付中間連結軸１２のつば１２aとの間
に密に挟むので、圧縮空気が空間４０から外部に漏れな
いようにシールすることができる。また、起動運転が終
了した後の通常運転では、起動用空気槽からの圧縮空気
をこの起動用空気分配装置に供給しないので、つば付中
間連結軸１２が軸方向に回転弁体２側と反対の側に付勢
されず、つば付ブッシュ１３は、すべり軸受としての機
能を十分に果たすことができる。Further, at the time of starting, the compressed intermediate air supplied from the starting air tank urges the flanged intermediate connection shaft 12 in the axial direction toward the side opposite to the rotary valve body 2 to move it. Since the flange 13a of the thirteen is tightly sandwiched between the stepped portion 6c as the inner end surface of the cylindrical member 6 and the flange 12a of the intermediate connecting shaft 12 with a flange, it is necessary to seal the compressed air from leaking from the space 40 to the outside. Can be. In the normal operation after the start-up operation is completed, the compressed air from the start-up air tank is not supplied to the start-up air distribution device, so that the flanged intermediate connection shaft 12 is axially opposite to the rotary valve body 2 side. , The flanged bush 13 can sufficiently function as a sliding bearing.
【００２２】上記実施の形態では、内燃機関としてのデ
ィーゼルエンジンにこの発明の起動用空気分配装置を適
用したが、内燃機関はこれに限らないのは勿論である。In the above embodiment, the starting air distribution device of the present invention is applied to a diesel engine as an internal combustion engine. However, the internal combustion engine is not limited to this.
【００２３】また、上記ハウジング１,回転弁体２,カバ
ー５およびブッシュ１０で空気分配弁を構成したが、空
気分配弁はこれに限らず、内燃機関のカム軸に一端が連
結された回転弁体を有し、その回転弁体により空気圧源
から圧縮空気を分配するものであればよい。Although the housing 1, the rotary valve body 2, the cover 5 and the bush 10 constitute an air distribution valve, the air distribution valve is not limited to this, and a rotary valve having one end connected to a camshaft of an internal combustion engine. Any structure may be used as long as it has a body and distributes compressed air from an air pressure source by the rotary valve body.
【００２４】[0024]
【発明の効果】以上より明らかなように、請求項１の発
明の内燃機関の起動用空気分配装置は、空気圧源からの
圧縮空気をシリンダヘッド毎に設けられた始動バルブに
分配する内燃機関の起動用空気分配装置において、上記
内燃機関のカム軸に一端が連結された回転弁体を有し、
上記回転弁体により上記空気圧源からの圧縮空気を分配
する空気分配弁と、上記空気分配弁の上記回転弁体の他
端に連結された回転計出力軸と、上記回転計出力軸とそ
の回転計出力軸の軸受部分との間から上記圧縮空気が外
部に漏れないようにするシール装置とを備えたものであ
る。As apparent from the above description, the starting air distribution device for an internal combustion engine according to the first aspect of the present invention distributes compressed air from an air pressure source to a starting valve provided for each cylinder head. In the starting air distribution device, a rotary valve body having one end connected to the camshaft of the internal combustion engine,
An air distribution valve that distributes compressed air from the air pressure source by the rotary valve body, a tachometer output shaft connected to the other end of the rotary valve body of the air distribution valve, the tachometer output shaft and its rotation A sealing device for preventing the compressed air from leaking to the outside from between the bearing portion of the meter output shaft.
【００２５】したがって、請求項１の発明の内燃機関の
起動用空気分配装置によれば、上記空気圧源から回転弁
体を経て始動バルブのピストンに供給される圧縮空気
は、シール装置により回転計出力軸とその回転計出力軸
の軸受部分との間から外部に漏れることがない。したが
って、駆動ギヤや駆動装置等を別に用いることなく、簡
単な構造で回転計用の出力を得ることができるので、メ
ンテナンスが殆ど不要で安価な内燃機関の起動用空気分
配装置を実現することができる。Therefore, according to the first aspect of the present invention, the compressed air supplied from the air pressure source to the piston of the starting valve via the rotary valve body is output from the tachometer by the sealing device. There is no leakage to the outside from between the shaft and the bearing portion of the tachometer output shaft. Therefore, the output for the tachometer can be obtained with a simple structure without using a driving gear, a driving device, and the like separately, thereby realizing an inexpensive starting air distribution device for an internal combustion engine that requires almost no maintenance. it can.
【００２６】また、請求項２の発明の内燃機関の起動用
空気分配装置は、請求項１の内燃機関の起動用空気分配
装置において、上記シール装置は、上記回転弁体と上記
回転計出力軸との間に、上記回転弁体と上記回転計出力
軸とを連結するように、かつ、軸方向に移動可能に配置
され、上記回転弁体側につばを有するつば付中間連結軸
と、上記つば付中間連結軸に軸方向に移動可能に外嵌す
ると共に、上記回転弁体側の一端につばを有するつば付
ブッシュとを備え、上記つば付ブッシュのつばが上記軸
受部分の内側端面と上記つば付中間連結軸のつばとの間
に密に挟まれてシールするようにしたものである。According to a second aspect of the present invention, there is provided a starting air distribution device for an internal combustion engine, wherein the sealing device comprises the rotary valve body and the tachometer output shaft. Between the rotary valve element and the tachometer output shaft so as to be connected and movably in the axial direction, and a collared intermediate connection shaft having a collar on the rotary valve element side; A flanged bush having a flange at one end on the rotary valve body side, wherein the collar has an inner end face of the bearing portion and the flanged bush. The seal is tightly sandwiched between the collar of the intermediate connecting shaft.
【００２７】したがって、請求項２の発明の内燃機関の
起動用空気分配装置によれば、上記内燃機関の起動時
に、上記空気圧源から空気分配弁に供給された圧縮空気
によって、上記シール装置のつば付中間連結軸を軸方向
に回転弁体側と反対の側に付勢して移動させ、上記つば
付ブッシュのつばを上記軸受部分の内側端面とつば付中
間連結軸のつばとの間に密に挟むので、圧縮空気が外部
に漏れないようにシールすることができる。また、起動
運転が終了した後の通常運転では、空気圧源からの圧縮
空気を空気分配弁に供給しないので、上記つば付ブッシ
ュはすべり軸受としての機能を十分に果たすことができ
る。Therefore, according to the air distribution device for starting an internal combustion engine according to the second aspect of the present invention, when the internal combustion engine is started, the collar of the sealing device is compressed by the compressed air supplied from the air pressure source to the air distribution valve. The flanged intermediate connecting shaft is biased and moved in the axial direction to the side opposite to the rotary valve body side, and the flange of the flanged bush is densely disposed between the inner end surface of the bearing portion and the flange of the flanged intermediate coupling shaft. Since the compressed air is sandwiched, the compressed air can be sealed so as not to leak outside. In the normal operation after the start-up operation is completed, the compressed air from the air pressure source is not supplied to the air distribution valve, so that the flanged bush can sufficiently function as a slide bearing.
【図１】 図１はこの発明の実施の形態の内燃機関の起
動用空気分配装置の断面図である。FIG. 1 is a sectional view of a starting air distribution device for an internal combustion engine according to an embodiment of the present invention.
【図２】 図２は図１の要部の拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of FIG.
【図３】 図３は従来の内燃機関の起動用空気分配装置
の断面図である。FIG. 3 is a sectional view of a conventional air distribution device for starting an internal combustion engine.
【図４】 図４は上記起動用空気分配装置と回転計出力
軸用の駆動装置の模式図である。FIG. 4 is a schematic diagram of the starting air distribution device and a driving device for a tachometer output shaft.
１…ハウジング、２…回転弁体、２a…軸部、２b…円板
部、３…カム軸、４,１１…中間継手、５…カバー、５a
…空気入口、５b…貫通穴、６…円筒部材、１２…つば
付中間連結軸、１３…つば付ブッシュ、１４…回転計出
力軸、１５連結部、１６…ナット、１７…フレキシブル
ケーブル、２１…空気通路、２２…排出通路、２３…排
出穴、２４…導入穴。DESCRIPTION OF SYMBOLS 1 ... Housing, 2 ... Rotary valve body, 2a ... Shaft part, 2b ... Disk part, 3 ... Cam shaft, 4, 11 ... Intermediate joint, 5 ... Cover, 5a
... air inlet, 5b ... through-hole, 6 ... cylindrical member, 12 ... intermediate connecting shaft with flange, 13 ... bush with collar, 14 ... tachometer output shaft, 15 connecting part, 16 ... nut, 17 ... flexible cable, 21 ... Air passage, 22 ... discharge passage, 23 ... discharge hole, 24 ... introduction hole.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭53−57333（ＪＰ，Ａ) 実開 昭59−13669（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F02N 9/04 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-53-57333 (JP, A) JP-A-59-13669 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F02N 9/04
Claims (2)
ド毎に設けられた始動バルブに分配する内燃機関の起動
用空気分配装置において、 上記内燃機関のカム軸に一端が連結された回転弁体を有
し、上記回転弁体により上記空気圧源からの圧縮空気を
分配する空気分配弁と、 上記空気分配弁の上記回転弁体の他端に連結された回転
計出力軸と、 上記回転計出力軸とその回転計出力軸の軸受部分との間
から上記圧縮空気が外部に漏れないようにするシール装
置とを備えたことを特徴とする内燃機関の起動用空気分
配装置。1. An internal combustion engine starting air distribution device for distributing compressed air from an air pressure source to a starting valve provided for each cylinder head, comprising: a rotary valve element having one end connected to a camshaft of the internal combustion engine. An air distribution valve for distributing compressed air from the air pressure source by the rotary valve body; a tachometer output shaft connected to the other end of the rotary valve body of the air distribution valve; And a seal device for preventing the compressed air from leaking to the outside from between the bearing and the bearing portion of the tachometer output shaft.
分配装置において、上記シール装置は、上記回転弁体と
上記回転計出力軸との間に、上記回転弁体と上記回転計
出力軸とを連結するように、かつ、軸方向に移動可能に
配置され、上記回転弁体側につばを有するつば付中間連
結軸と、上記つば付中間連結軸に軸方向に移動可能に外
嵌すると共に、上記回転弁体側の一端につばを有するつ
ば付ブッシュとを備え、上記つば付ブッシュのつばが上
記軸受部分の内側端面と上記つば付中間連結軸のつばと
の間に密に挟まれてシールするようにしたことを特徴と
する内燃機関の起動用空気分配装置。2. The air distribution device for starting an internal combustion engine according to claim 1, wherein said seal device is provided between said rotary valve body and said tachometer output shaft. A shaft-connected intermediate connecting shaft having a flange on the side of the rotary valve body, which is arranged so as to be movable with respect to the shaft, and which is fitted to the intermediate connecting shaft with the collar so as to be movable in the axial direction. And a flanged bush having a flange at one end on the rotary valve body side, wherein the flange of the flanged bush is closely sandwiched between the inner end surface of the bearing portion and the flange of the flanged intermediate connection shaft. An air distribution device for starting an internal combustion engine, wherein the air distribution device is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25982795A JP3308136B2 (en) | 1995-10-06 | 1995-10-06 | Air distribution device for starting internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25982795A JP3308136B2 (en) | 1995-10-06 | 1995-10-06 | Air distribution device for starting internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09100765A JPH09100765A (en) | 1997-04-15 |
| JP3308136B2 true JP3308136B2 (en) | 2002-07-29 |
Family
ID=17339548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25982795A Expired - Fee Related JP3308136B2 (en) | 1995-10-06 | 1995-10-06 | Air distribution device for starting internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3308136B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644063A (en) * | 2013-12-30 | 2014-03-19 | 淄博淄柴新能源有限公司 | Air distribution device for starting large internal combustion engine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002098239A (en) * | 2000-09-22 | 2002-04-05 | Fuji Photo Film Co Ltd | Shaft sealing structure and manufacturing method for planographic plate |
| JP5657487B2 (en) * | 2011-08-03 | 2015-01-21 | ダイハツディーゼル株式会社 | Start-up air distributor |
-
1995
- 1995-10-06 JP JP25982795A patent/JP3308136B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103644063A (en) * | 2013-12-30 | 2014-03-19 | 淄博淄柴新能源有限公司 | Air distribution device for starting large internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09100765A (en) | 1997-04-15 |
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