JPS63154781U

JPS63154781U -

Info

Publication number: JPS63154781U
Application number: JP1987046151U
Authority: JP
Priority date: 1987-03-28
Filing date: 1987-03-28
Publication date: 1988-10-11

Description

[Brief explanation of the drawing]

第１図はこの考案にかかるピストンポンプのピ
ストンパツキンの構造図、第２図はピストンパツ
キンを具備する強制弁式ピストンポンプの一例を
示す構造図、第３図は従来のピストンパツキンの
構造図である。１４……シリンダパイプ（シリンダ）、２０…
…ピストン棒、２６……吸入弁、２８……弁体、
３０……弁座、３４……ストツパ、４０……通孔
、４２……ピストンパツキン、６６，７０……リ
ツプ部。 Fig. 1 is a structural diagram of the piston seal of the piston pump according to this invention, Fig. 2 is a structural diagram showing an example of a forced valve type piston pump equipped with a piston seal, and Fig. 3 is a structural diagram of a conventional piston seal. be. 14...Cylinder pipe (cylinder), 20...
... Piston rod, 26 ... Suction valve, 28 ... Valve body,
30... Valve seat, 34... Stopper, 40... Through hole, 42... Piston packing, 66, 70... Lip portion.

Claims

[Scope of utility model registration request]

a valve body for a suction valve fixed to the tip of the piston rod; a stopper fixed to the piston rod further to the tip side of the valve body for the suction valve and having a through hole; and a stopper for the suction valve in the axial direction of the piston rod. A suction valve valve seat loosely fitted to the piston rod between the suction valve body and the stopper, and a piston seal that is integrally fixed to the outer periphery of the suction valve valve seat and slides on the inner surface of the cylinder. In the piston pump, the piston seal includes a lip portion that protrudes toward the stopper in the axial direction of the piston rod and slides on the inner surface of the cylinder, as well as a lip portion that protrudes toward the suction valve valve body side and includes a lip portion that protrudes toward the stopper in the axial direction of the piston rod and slides on the inner surface of the cylinder. A piston seal for a piston pump, characterized in that it has a lip portion that slides on the inner surface of a cylinder.