JPS59167961U - injection pump - Google Patents

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の一実施例としての噴射ポンプの断面図
、第２図および第４図は同上噴射ポンプの各々異なる状
態での要部拡大断面図、第３図は同上噴射ポンプのプラ
ンジャ上部の側面図、第５図は第２図のＡ矢視方向の低
面図、第６図は同上噴射ポンプの吐出弁の作動説明図、
第７図は同上噴射ポンプの吐出弁のリフト量一時間線図
をそれぞれ示している。　、 １・・・・・・噴射ポンプ、２・・・・・・プランジャ
バレル、４・・・・・・プランジャ、６・・・・・・バ
レル室、７・・・・・・吐出弁、８・・・・・・連絡路
、９・・・・・・吐出室、１０・・・・・・噴射ｔ、１
０１・・・・・・ハウジング、１１・曲・噴射ノズル、
１２・・・・・・テーパ穴、１３・・・・・・横向穴、
４０１・・・・・・頂面、７０４・・・・・・テーパ状
突部。Fig. 1 is a sectional view of an injection pump as an embodiment of the present invention, Figs. 2 and 4 are enlarged sectional views of essential parts of the above injection pump in different states, and Fig. 3 is a plunger of the above injection pump. A side view of the upper part, FIG. 5 is a bottom view in the direction of arrow A in FIG. 2, and FIG. 6 is an explanatory diagram of the operation of the discharge valve of the same injection pump.
FIG. 7 shows a lift amount per hour diagram of the discharge valve of the same injection pump. , 1...Injection pump, 2...Plunger barrel, 4...Plunger, 6...Barrel chamber, 7...Discharge valve, 8...Connection path, 9...Discharge chamber, 10...Injection t, 1
01・・・Housing, 11・Curve・Injection nozzle,
12...Tapered hole, 13...Horizontal hole,
401...Top surface, 704...Tapered protrusion.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ハウジング内に支持されるプランジャバレルと、このプ
ランジャバレル内に嵌挿され、エンジンの駆動軸に連動
して往復動するプランジャと、上記プランジャバレル内
のバレル室より噴射ノズルに連通ずる吐出室までを結ぶ
連絡路を開閉する吐出弁Ｘを有し、上記プランジャはそ
のバレル室対向面よりプランジャ長手方向に伸びるテー
パ状内周壁穴と、このテーパ状内周壁穴の低部よりプラ
ンジャ周側面までを結ぶ横向穴とを形成され、上記吐出
弁のバレル室対向端をテーパ状突部に形成し、上記吐出
弁の閉弁作動時において、テーパ状突部とテーパ状内周
壁穴との隙間が液体に流動抵抗を与える隙間幅に設定さ
れる構成の噴射ポンプ。A plunger barrel supported in the housing, a plunger fitted into the plunger barrel and reciprocating in conjunction with the drive shaft of the engine, and a discharge chamber communicating from the barrel chamber in the plunger barrel to the injection nozzle. The plunger has a discharge valve X that opens and closes a connecting passage, and the plunger connects a tapered inner circumferential wall hole extending in the longitudinal direction of the plunger from the surface facing the barrel chamber, and a lower part of this tapered inner circumferential wall hole to the plunger circumferential side surface. The end of the discharge valve facing the barrel chamber is formed with a tapered protrusion, and when the discharge valve is closed, a gap between the tapered protrusion and the tapered inner circumferential wall hole is formed with liquid. An injection pump configured to have a gap width that provides flow resistance.