JPH01110871A - Fuel injection pump for internal combustion engine - Google Patents
Fuel injection pump for internal combustion engineInfo
- Publication number
- JPH01110871A JPH01110871A JP26545687A JP26545687A JPH01110871A JP H01110871 A JPH01110871 A JP H01110871A JP 26545687 A JP26545687 A JP 26545687A JP 26545687 A JP26545687 A JP 26545687A JP H01110871 A JPH01110871 A JP H01110871A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- injection pump
- fuel injection
- tappet
- internal combustion
- 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.)
- Granted
Links
Landscapes
- Fuel-Injection Apparatus (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は内燃機関用噴射ポンプに係り、特に噴射ポン
ププランジ中を駆動するタペットにおいて、ローラピン
にスナップリングを嵌入して軸方向の変位を規制して、
従来のボア径に対するローラ外径やカムのベース円径の
制約条件をなくして、設計の自由度を大きくしたフロー
テング方式のタペットを有する内燃機関用燃料噴射ポン
プに関するものである。Detailed Description of the Invention (Industrial Application Field) This invention relates to an injection pump for an internal combustion engine, and in particular, in a tappet that drives the injection pump plunge, a snap ring is fitted into a roller pin to regulate axial displacement. do,
The present invention relates to a fuel injection pump for an internal combustion engine that has a floating type tappet that has a greater degree of freedom in design by eliminating the conventional constraints on the outer diameter of the roller and the base circle diameter of the cam relative to the bore diameter.
（従来の技術）
従来の燃料噴射ポンプのタペットは、ローラピンをタペ
ットボディに固定し、ローラ内径に自由に回転できるロ
ーラブツシュを嵌入して。(Prior art) In the tappet of a conventional fuel injection pump, a roller pin is fixed to the tappet body, and a freely rotating roller bush is inserted into the inner diameter of the roller.
ローラピンとローラブツシュとローラとの相対速度を低
減して耐久性向上を計ったものや、カムボア内径よりロ
ーラ外径とカムのベース円径の和を大きくしてローラピ
ンをタペットボア内で上下運動をするように設定の上、
ローラピンを自由にタペットボディ内で回転できるよう
に嵌入して、ローラブツシュを用いることなく。Some models are designed to improve durability by reducing the relative speed between the roller pin, roller bushing, and roller, while others are designed to move the roller pin up and down within the tappet bore by making the sum of the outer diameter of the roller and the base circle diameter of the cam larger than the inner diameter of the cam bore. After setting it to
The roller pin is inserted so that it can freely rotate within the tappet body, without using a roller bush.
ローラピンとローラの相対速度を低減したものが広く用
いられている。Types in which the relative speed of the roller pin and roller is reduced are widely used.
（発明が解決しようとする問題点）
前記従来のローラブツシュを用いたタペットの場合は生
産コストが高く、ローラブツシュを用いない場合はロー
ラ外径を必要以上に大きくして、ローラピンがタペット
ボア内で上下運動するようにする必要があり、燃料噴射
ポンプの全高が高くなるという欠点がある。(Problems to be Solved by the Invention) Production costs are high for tappets using conventional roller bushings, and when roller bushings are not used, the outer diameter of the rollers is made larger than necessary and the roller pin moves up and down within the tappet bore. This has the disadvantage that the overall height of the fuel injection pump increases.
この発明は上述の問題点を解消することをその目的とす
るものである。The object of the present invention is to solve the above-mentioned problems.
（問題点を解決するための手段及び作用）この発明は、
前述の点に鑑みなされたものであって、ローラピン又は
タペットボディにスナップリング嵌入溝を設け、該スナ
ップ嵌入溝にスナップリングを嵌入して軸方向の変位を
規制して、ローラピンをタペットボディ内で自由に回転
できるように嵌入し、ローラブツシュを用いることなく
、かつ構造上の制約条件がなく設計上の自由度の大きい
、前記の問題点を解消した安価なフローテング方式のタ
ペットを有する内燃機関の燃料噴射ポンプを提供するも
のである。(Means and effects for solving the problem) This invention has the following features:
This was developed in view of the above points, and the roller pin or tappet body is provided with a snap ring fitting groove, and the snap ring is fitted into the snap fitting groove to regulate displacement in the axial direction, so that the roller pin can be inserted into the tappet body. An internal combustion engine having an inexpensive floating type tappet that is inserted so that it can rotate freely, does not use a roller bushing, has no structural constraints, and has a large degree of freedom in design, and solves the above problems. The present invention provides a fuel injection pump.
（実施例）
つぎにこの発明の実施例を第１図及び第２図を参照して
説明する。(Example) Next, an example of the present invention will be described with reference to FIGS. 1 and 2.
これらの図において、ｌはローラで、該ローラｌは噴射
ポンプのカム２に接触して回転しながらカムリフトに従
って上下運動するようになっている。３はローラピンで
、１亥ローラピン３はタペットボディ４に回転可能な４
ｔ ｔｓで嵌入されていて、軸方向の変位はローラピン
３に設けられているスナップリング嵌入溝５に嵌入され
ているスナップリング６によって規制されるようになっ
ている。In these figures, 1 is a roller, and the roller 1 contacts the cam 2 of the injection pump and rotates while moving up and down according to the cam lift. 3 is a roller pin, 1 roller pin 3 is a rotatable 4 on the tappet body 4.
t ts, and displacement in the axial direction is regulated by a snap ring 6 fitted into a snap ring fitting groove 5 provided on the roller pin 3.
よってこの発明の実施例のものは、ローラブツシュを用
いることなしにローラとローラピンとの相対速度を低減
でき、従来のもののようにローラ径を必要以上に大きく
する必要もなく。Therefore, the embodiment of the present invention can reduce the relative speed between the roller and the roller pin without using a roller bushing, and there is no need to make the roller diameter larger than necessary as in the conventional method.
カムボア内径よりもローラ外径とカムベース内径との和
を小さくできる。The sum of the roller outer diameter and the cam base inner diameter can be made smaller than the cam bore inner diameter.
従って全高が低くかつ自由度の高い設計が可能となる。Therefore, the total height is low and a design with a high degree of freedom is possible.
（発明の効果）
この発明は前述のようにしてなるので、ローラブツシュ
を用いることなく、ローラとローラピンの相対速度を低
減するとともに、カムボア径に対するローラ外径やカム
のベース円径の制約条件を不要とし、ローラ径を必要以
上に大きくする必要がなくなるため、全高の低いタペッ
トを有する安価な燃料噴射ポンプとすることができた。(Effects of the Invention) Since this invention is implemented as described above, the relative speed between the roller and roller pin can be reduced without using a roller bush, and there is no need for constraints on the outer diameter of the roller or the base circle diameter of the cam relative to the cam bore diameter. Since there is no need to make the roller diameter larger than necessary, an inexpensive fuel injection pump having a tappet with a low overall height can be obtained.
従ってこの発明によれば自由度の極めて高い設計が可能
となる。Therefore, according to the present invention, design with an extremely high degree of freedom is possible.
第１図はこの発明の一実施例のタペットの断面図を示し
、第２図は該タペットを存する燃料噴射ポンプの横断面
図を示す。
ｌ・・・ローラ、 ２・・・カム。
３・・・ローラピン、 ４・・・タペットボディ。
５・・・スナップリング嵌入溝。
６・・・スナップリング。
特 許 出 願 人 株式会社 小松製作所化 理 人
（弁理士）松 澤 統第１図FIG. 1 shows a cross-sectional view of a tappet according to an embodiment of the invention, and FIG. 2 shows a cross-sectional view of a fuel injection pump including the tappet. l...roller, 2...cam. 3...Roller pin, 4...Tappet body. 5...Snap ring insertion groove. 6...Snap ring. Patent applicant Osamu Matsuzawa (patent attorney), Komatsu Ltd. Figure 1
Claims (1)
，ローラピンをタペットボディに対して回転自由な状態
で嵌入すると共に，ローラピン又はタペットボディにス
ナップリング嵌入溝設け，該スナップリング嵌入溝にス
ナップリングを嵌入して軸方向の変位を規制するように
したことを特徴とする内燃機関用燃料噴射ポンプ。In the tappet of a fuel injection pump for a diesel engine, the roller pin is inserted into the tappet body in a freely rotatable state, and a snap ring insertion groove is provided in the roller pin or the tappet body, and the snap ring is inserted into the snap ring insertion groove to connect the shaft. A fuel injection pump for an internal combustion engine, characterized in that directional displacement is regulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62265456A JP2628316B2 (en) | 1987-10-22 | 1987-10-22 | Fuel injection pump for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62265456A JP2628316B2 (en) | 1987-10-22 | 1987-10-22 | Fuel injection pump for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01110871A true JPH01110871A (en) | 1989-04-27 |
| JP2628316B2 JP2628316B2 (en) | 1997-07-09 |
Family
ID=17417418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62265456A Expired - Lifetime JP2628316B2 (en) | 1987-10-22 | 1987-10-22 | Fuel injection pump for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2628316B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007006320A1 (en) * | 2007-02-08 | 2008-08-14 | Schaeffler Kg | Mechanical roller tappet for an internal combustion engine |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120863U (en) * | 1982-02-10 | 1983-08-17 | 株式会社デンソー | fuel injection pump |
-
1987
- 1987-10-22 JP JP62265456A patent/JP2628316B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58120863U (en) * | 1982-02-10 | 1983-08-17 | 株式会社デンソー | fuel injection pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007006320A1 (en) * | 2007-02-08 | 2008-08-14 | Schaeffler Kg | Mechanical roller tappet for an internal combustion engine |
| US8104442B2 (en) | 2007-02-08 | 2012-01-31 | Schaeffler Kg | Mechanical roller tappet for an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2628316B2 (en) | 1997-07-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080418 Year of fee payment: 11 |