JPH03102070U

JPH03102070U -

Info

Publication number: JPH03102070U
Application number: JP1117290U
Authority: JP
Priority date: 1990-02-07
Filing date: 1990-02-07
Publication date: 1991-10-24

Description

[Brief explanation of the drawing]

第１図は本考案にかかる往復動ポンプの縦断面
図、第２図は同ポンプの半断側面図、第３図〜第
５図は他の実施例を示す断面図である。１……ポンプ本体、１ａ……密閉室、５……プ
ランジヤ、５１……吸込通路、６……駆動機構、
７……駆動軸、７１……偏心軸部、８……軸受、
９……カム体、９１……カム面、１０……接触部
材、Ｆ……復動機構、Ｈ……保持機構、Ｔ……吸
入隙間。 FIG. 1 is a longitudinal sectional view of a reciprocating pump according to the present invention, FIG. 2 is a half-sectional side view of the same pump, and FIGS. 3 to 5 are sectional views showing other embodiments. DESCRIPTION OF SYMBOLS 1... Pump body, 1a... Sealed chamber, 5... Plunger, 51... Suction passage, 6... Drive mechanism,
7... Drive shaft, 71... Eccentric shaft portion, 8... Bearing,
9...Cam body, 91...Cam surface, 10...Contact member, F...Return mechanism, H...Holding mechanism, T...Suction gap.

Claims

[Claims for Utility Model Registration] 1. A plunger 5 supported on the pump body 1 in a reciprocating manner, a drive shaft 7 having an eccentric shaft portion 71, and a drive shaft 7 supported by the eccentric shaft portion 71 via a bearing 8, A drive mechanism 6 for the plunger 5 is provided, and the drive mechanism 6 is provided in the pump body 1, and the drive mechanism 6 is provided with a cam body 9 having a cam surface 91 that faces an end face of the plunger 5 and moves the plunger 5 forward. A reciprocating pump characterized in that a sealed chamber 1a is provided, and a suction passage 14 of the plunger 5 is opened in the sealed chamber 1a, and the cam body 9 is formed of a water-lubricated material. 2. The suction passage 14 of the plunger 5 is formed by penetrating the plunger 5 in the axial direction, and a contact member 10 is provided between the plunger 5 and the cam surface 91.
The contact member 10 and the end face of the plunger 5 on the backward movement side form a suction valve mechanism, and during the backward movement stroke of the cam body 9, the plunger 5 and the contact member 10 are a double-acting mechanism F that moves the plunger 5 and the contact member 10;
2. The reciprocating pump according to claim 1, further comprising a holding mechanism H which is held at a backward position in the backward movement direction with respect to the backward movement end position of the pump, and forms a suction gap T between the plunger 5 and the contact member 10.