JPH01124011U

JPH01124011U -

Info

Publication number: JPH01124011U
Application number: JP1745088U
Authority: JP
Priority date: 1988-02-15
Filing date: 1988-02-15
Publication date: 1989-08-23

Description

[Brief explanation of the drawing]

第１図はプランジヤポンプの一実施例を示す断
面図、第２図はメインプランジヤが１回転する時
の回転角度と摺動変位量との関係を示したグラフ
、第３図乃至第５図はメインプランジヤの回転途
中での流出通路における断面図である。１０……プランジヤポンプ、１２……ボア、１
４……ボデイ、１６……メインプランジヤ、２６
……ばね、３０……ポンプ室、３２……流入通路
、３４……流出通路、３６……吸入通路、３８…
…オイルタンク、４０……戻し通路、４２……吐
出通路、４４……ウオームホイール、４６……ク
ランク軸、４８……ウオーム、５０……端面カム
、５２……ピン。 Figure 1 is a sectional view showing an embodiment of a plunger pump, Figure 2 is a graph showing the relationship between the rotation angle and the amount of sliding displacement when the main plunger makes one rotation, and Figures 3 to 5 are FIG. 3 is a cross-sectional view of the outflow passage during rotation of the main plunger. 10...Plunger pump, 12...Bore, 1
4...Body, 16...Main plunger, 26
...Spring, 30...Pump chamber, 32...Inflow passage, 34...Outflow passage, 36...Suction passage, 38...
... Oil tank, 40 ... Return passage, 42 ... Discharge passage, 44 ... Worm wheel, 46 ... Crankshaft, 48 ... Worm, 50 ... End face cam, 52 ... Pin.

Claims

[Scope of utility model registration request]

a worm that rotates as the crankshaft of an engine rotates; a body that has a bore; an inlet that passes through the bore and sucks in fluid from a tank; and a discharge port that passes through the bore and discharges the fluid; a main plunger rotatably and slidably mounted in the bore of the body, the main plunger having a pump chamber that can communicate with the port through an inflow passage and with the discharge port through an outflow passage; an end cam provided at the end of the plunger and having unevenness in the axial direction; an engaging means provided on the outer periphery of the plunger for engaging with the worm; and a biasing means for urging the plunger toward the end cam. , a control pin that contacts an end cam of the plunger; a first discharge port that returns most of the fluid sucked into the pump chamber to the tank; 1. A plunger pump characterized in that the plunger pump is formed separately from a second discharge port for discharging fluid remaining in the pump chamber after the fluid is discharged from the pump chamber to the engine side.