Wobble assembly for fluid pumping mechanism

摘要

A fluid dispensing device comprises a housing body, a reciprocating piston fluid pump, a primary drive element, a wobble assembly and a spray tip. The reciprocating piston fluid pump has a piston disposed within a pumping chamber inside the housing body. The primary drive element is coupled to the housing body to provide a rotary input. The wobble assembly connects the primary drive element to the reciprocating piston fluid pump to convert the rotary input into reciprocating input to the piston. The spray tip connects to an outlet of the pumping chamber.

主权项

1. A fluid dispensing device comprising:
a housing body; a reciprocating piston fluid pump having a first piston disposed within a first pumping chamber inside the housing body; a primary drive element coupled to the housing body to provide a rotary input; a wobble assembly connecting the primary drive element to the reciprocating piston fluid pump to convert the rotary input into reciprocating input to the first piston, the wobble assembly comprising:
a shaft disposed within the housing along a drive axis of rotation and configured to receive the rotary input from the primary drive element;a land disposed about the shaft to surround the drive axis of rotation, the land having a cylindrical surface disposed about a wobble axis offset from the drive axis of rotation;a connecting rod mounted on the land and connected to the first piston;a bearing assembly disposed between the land and the connecting rod; andan input gear disposed about the shaft to receive input from the primary drive element; and a spray tip connected to the first pumping chamber.