| 摘要 |
A plunger pump includes: a pump body having a cylinder hole; a lid member configured to seal one end of the cylinder hole; a plunger which is slidably attached within the cylinder hole, one end of the plunger defining a pump chamber between the one end and the lid member and the other end of the plunger abutting against a driving member; and a coil spring which is disposed within the pump chamber and presses the plunger toward the driving member side, wherein: when the plunger reciprocally moves in an axial direction within the cylinder hole, fluid sucked into the pump chamber from a suction port is ejected from an ejection port of the pump chamber; and the lid member has a spherical shape and one end of the coil spring is received by a surface of the lid member. |
