This utility model relates to the field of
vacuum pump technology, specifically a reciprocating
vacuum pump. It includes: a first housing with an inlet and an outlet; a first cavity formed on the first housing and connected to the inlet; a second cavity formed on the first housing and connected to the outlet; a valve plate located at the lower end of the first housing and equipped with a one-way valve; a second housing located at the lower end of the valve plate and equipped with a third cavity and a fourth cavity; the third cavity is connected to the first and second cavities via a one-way valve, and the fourth cavity is connected to the first and second cavities via a one-way valve. A cylindrical cavity is provided inside the second housing, with its two ends connected to the third and fourth cavities respectively, and a
piston is slidably disposed within the cylindrical cavity. A rotatable
crank and a slidable slide rod are provided inside the second housing, with a connecting rod between the
crank and the slide rod, and the slide rod connected to the
piston. The
reciprocating motion of the
piston can generate a vacuum, resulting in higher working efficiency.