JPH0232876Y2 - - Google Patents
Info
- Publication number
- JPH0232876Y2 JPH0232876Y2 JP1984111881U JP11188184U JPH0232876Y2 JP H0232876 Y2 JPH0232876 Y2 JP H0232876Y2 JP 1984111881 U JP1984111881 U JP 1984111881U JP 11188184 U JP11188184 U JP 11188184U JP H0232876 Y2 JPH0232876 Y2 JP H0232876Y2
- Authority
- JP
- Japan
- Prior art keywords
- rod
- oil seal
- notch
- press
- outer periphery
- 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
Links
- 239000000446 fuel Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】
本考案は内燃機関用機械式燃料ポンプの改良に
関するものである。[Detailed Description of the Invention] The present invention relates to an improvement of a mechanical fuel pump for an internal combustion engine.
現在の内燃機関用機械式燃料ポンプの構造を説
明すれば、第１図において１はアツパーケーシン
グ。２はセパレータで、吐出弁３、吸入弁４が取
り付けられている。５はインテークチヤンパであ
る。６はダイヤフラムで、その中央部は、その両
面に、裏当板７，８を添えてロツド９の一端に固
定される。１０はロアーボデーで、２つの取付面
１０ａ，１０ｂを有し、取付面１０ａにはダイヤ
フラム６及びセパレータ２の周囲がアツパーケー
シング１の端部にて巻き込み固定される。１１は
ダイヤフラム６を作動させるスプリングである。
１２はロツカアームで、エンジン内に取り付けら
れた偏心カム１３の回動によりピン１４を支点と
して揺動し、その一端のロツド９を上下動させる
ことによつてダイヤフラム６に往復動を与えてポ
ンプ作動させるものである。１５はオイルシール
で、ロアーボデー１０を二室Ａ，Ｂに分割してい
る。１６は入口パイプ。１７は出口パイプ。１８
はリターンパイプである。 To explain the structure of current mechanical fuel pumps for internal combustion engines, in Fig. 1, 1 is an upper casing. 2 is a separator to which a discharge valve 3 and a suction valve 4 are attached. 5 is an intake damper. 6 is a diaphragm, the central part of which is fixed to one end of the rod 9 with backing plates 7 and 8 attached to both sides thereof. A lower body 10 has two mounting surfaces 10a and 10b, and the diaphragm 6 and separator 2 are wrapped around the mounting surface 10a at the end of the upper casing 1 and fixed thereto. 11 is a spring that operates the diaphragm 6.
Reference numeral 12 denotes a rocker arm, which swings about a pin 14 as a fulcrum by the rotation of an eccentric cam 13 installed in the engine, and by moving the rod 9 at one end up and down, it gives a reciprocating motion to the diaphragm 6 to operate the pump. It is something that makes you 15 is an oil seal that divides the lower body 10 into two chambers A and B. 16 is the inlet pipe. 17 is the exit pipe. 18
is the return pipe.
以上が従来品の構造を説明したものであるが、
以下その作動を説明すれば、機関内に取り付けら
れた偏心カム１３の回動によつて、ピン１４を支
点としてロツカアーム１２を揺動運動させ、ロツ
ド９を上下動させる。ロツド９が上下動すること
によつてダイヤフラム６を往復動しポンプ作動を
行い、吐出弁４、吸入弁３を介して燃料を、燃料
タンクから入口パイプ１６を通つて、吐出パイプ
１７より、内燃機関に供給するものである。 The above is an explanation of the structure of the conventional product.
The operation will be described below. By the rotation of an eccentric cam 13 installed in the engine, the rocker arm 12 is oscillated about the pin 14, and the rod 9 is moved up and down. As the rod 9 moves up and down, the diaphragm 6 reciprocates to operate the pump, and fuel is supplied from the fuel tank through the inlet pipe 16 and from the discharge pipe 17 to the internal combustion engine through the discharge valve 4 and suction valve 3. It supplies to institutions.
以上が従来品の作動を簡単に説明したものであ
るが、従来品のものにおいては、その作動中にお
いて致命的な欠点がある。以下その作動を説明す
ると、先ず第２図はダイヤフラム６を下死点に押
し下げた時を示すものであるが、オイルシール１
５にロツド９が圧入されているため、作動中もそ
の圧入部は追従して作動する。従つてオイルシー
ル１５は、その湾曲部が、この時点で図のように
変形する。次に第３図はダイヤフラム６を上死点
に押し上げた時を示すものであり、オイルシール
１５が図のように変形する。燃料ポンプの作動
中、オイルシール１５は以上のような変形を繰り
返す。従つてオイルシール１５の湾曲部に応力が
集中し、オイルシール１５の耐久性を著しく低下
させる原因となる。本考案は以上の欠点を解消し
ようとするものであり、その特徴とするところ
は、オイルシールのロツド圧入部の厚肉部外周に
切り欠きを設け、該オイルシールの、スプリング
の座にあたる厚内部に、前記ロツドの圧入部のス
トロークを制御するストツパの外周を狭持させ、
該ストツパの内周を前記ロツド圧入部の切り欠き
に係合させたところにある。以下本考案を図を用
いて説明すれば先ずオイルシール１５をのぞく１
から１７までは従来品と変わらないので構造の説
明は省略する。次にオイルシール１５′について
説明すると、オイルシール１５′は厚肉にしたロ
ツド９の圧入部１５′ａを有し、該圧入部１５′ａ
の外周部には切り欠き１５′ｂを有する。オイル
シール１５′のスプリングの座にあたる厚肉部１
５′ｃに、前記ロツド圧入部部１５′ａのストロー
クを制御する為のストツパ１９の外周を狭持して
いる。前記ストツパ１９の内周を前記切り欠き１
５′ｂに係合している。本考案は以上の様な構造
であり、以下その作動を説明すると、偏心カム１
３の回動によつて、ロツド９が上下動した際、ワ
ツド９が圧入されたオイルシール１５′の圧入部
１５′ａは切り欠き１５′ｂの幅Ｓの範囲でロツド
９に追従するが、ストツパ１９が、それ以上の圧
入部１５′ａの動きを制限するので、ロツド９は
それ以上ストロークする場合は圧入部１５′ａを
スライド作動する。 The above is a brief explanation of the operation of the conventional product, but the conventional product has a fatal drawback during its operation. The operation will be explained below. First, Figure 2 shows the state when the diaphragm 6 is pushed down to the bottom dead center.
Since the rod 9 is press-fitted into the rod 5, the press-fitted portion follows and operates even during operation. Therefore, the curved portion of the oil seal 15 deforms as shown in the figure at this point. Next, FIG. 3 shows the state when the diaphragm 6 is pushed up to the top dead center, and the oil seal 15 is deformed as shown. During operation of the fuel pump, the oil seal 15 repeatedly deforms as described above. Therefore, stress concentrates on the curved portion of the oil seal 15, causing a significant decrease in the durability of the oil seal 15. The present invention is an attempt to eliminate the above-mentioned drawbacks, and its characteristics are that a notch is provided on the outer periphery of the thick part of the rod press-fit part of the oil seal, and the thick part of the oil seal, which is the seat of the spring, is cut out. holding the outer periphery of a stopper that controls the stroke of the press-fitting portion of the rod;
The inner periphery of the stopper is engaged with the notch of the rod press-fitting portion. The present invention will be explained below using diagrams. First, we will look at the oil seal 15.
The structure from 1 to 17 is the same as the conventional product, so a description of the structure will be omitted. Next, the oil seal 15' will be explained. The oil seal 15' has a press-fitted part 15'a of the thick-walled rod 9.
It has a notch 15'b on its outer periphery. Thick wall part 1 corresponding to the spring seat of oil seal 15'
At 5'c, the outer periphery of a stopper 19 for controlling the stroke of the rod press-fitting portion 15'a is held. The inner periphery of the stopper 19 is connected to the notch 1.
5'b. The present invention has the above-mentioned structure, and its operation will be explained below.The eccentric cam 1
When the rod 9 moves up and down due to the rotation of 3, the press-fitted part 15'a of the oil seal 15' into which the wand 9 is press-fitted follows the rod 9 within the width S of the notch 15'b. , the stopper 19 restricts further movement of the press-fit portion 15'a, so that when the rod 9 strokes any further, it slides the press-fit portion 15'a.
以上の様な作動をすることによつて、オイルシ
ール１５′の湾曲部に負担をかけることなく、オ
イルシール１５の耐久性を向上させることができ
るものである。 By performing the above-described operation, the durability of the oil seal 15 can be improved without placing any burden on the curved portion of the oil seal 15'.
第１図は従来の機械式燃料ポンプの断面図、第
２図は従来品の下死点時の部分断面図、第３図は
従来品の上死点時の部分断面図、第４図は本考案
品のオイルシール部の部分断面図である。
Fig. 1 is a sectional view of a conventional mechanical fuel pump, Fig. 2 is a partial sectional view of the conventional product at bottom dead center, Fig. 3 is a partial sectional view of the conventional product at top dead center, and Fig. 4 is a partial sectional view of the conventional mechanical fuel pump at top dead center. FIG. 3 is a partial cross-sectional view of the oil seal portion of the product of the present invention.
Claims (1)
ロツドを上下動させ、ロツドの先端に取り付けた
ダイヤフラムを往復動させる機械式ポンプにおい
て、オイルシールのロツド圧入部の厚肉部外周に
切り欠きを設け、該オイルシールの、スプリング
の座に当たる厚肉部の内側に、リング状のプレー
トで成形したストツパの外周を挾持させ、該スト
ツパの内周を前記切り欠きに係合させたことを特
徴とする内燃機関用機械式燃料ポンプ。 In a mechanical pump that moves a rod up and down via a rocker arm through the rotation of an eccentric cam, and reciprocates a diaphragm attached to the tip of the rod, a notch is provided on the outer periphery of the thick part of the rod press-fit part of the oil seal. An internal combustion engine characterized in that the outer periphery of a stopper formed by a ring-shaped plate is held between the inside of the thick-walled part that corresponds to the spring seat of the oil seal, and the inner periphery of the stopper is engaged with the notch. Mechanical fuel pump for engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11188184U JPS6127981U (en) | 1984-07-24 | 1984-07-24 | mechanical fuel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11188184U JPS6127981U (en) | 1984-07-24 | 1984-07-24 | mechanical fuel pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6127981U JPS6127981U (en) | 1986-02-19 |
| JPH0232876Y2 true JPH0232876Y2 (en) | 1990-09-05 |
Family
ID=30670953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11188184U Granted JPS6127981U (en) | 1984-07-24 | 1984-07-24 | mechanical fuel pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6127981U (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847265Y2 (en) * | 1978-06-01 | 1983-10-28 | 三菱自動車工業株式会社 | Mechanical fuel pump with diaphragm for internal combustion engines |
-
1984
- 1984-07-24 JP JP11188184U patent/JPS6127981U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6127981U (en) | 1986-02-19 |
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