Radial plunger type pump with counter weight and washer integrally secured

摘要

A radial plunger type pump includes a housing, an eccentric cam shaft rotatably supported by the housing, a pair of bearings for supporting the cam shaft in the housing, a radial plunger reciprocally disposed in a cylinder of the housing and reciprocating within the cylinder of the housing in accordance with the eccentric rotation of a cam portion of the eccentric cam shaft. The pump further includes a pair of counterweights disposed in spaces provided between the bearings and the cam portion of the eccentric cam shaft, the pair of counterweights including a counterweight portion for balancing the rotation of the eccentric cam shaft and washer portion for preventing the plunger from axial movement wherein the counterweight portion and and washer portion are integrally secured and wherein the counterweights are engaged with the eccentric cam shaft for preventing the relative rotation therewith.