Vacuum Air Pump and Glass-Wiping Apparatus

Abstract

A vacuum air pump and a glass-wiping device are provided. The air pump comprises a driving motor (2), an air pump body (1) and a piston air pump member (15), a rotating shaft (3) is provided in the air pump body, the driving motor transmits power to the rotating shaft via a transmission mechanism, a rotating wheel is fixed on the rotating shaft, a diameter-variable annular limitation groove (5) is formed in the rotating wheel; at least two piston air pump members are provided around the air pump body, a piston rod of each of the members is provided with a rolling element (6) at the end thereof, the rolling element is embedded in the annular limitation groove, the rotating shaft drives the rotating wheel to rotate, and the rolling element rolls within the diameter-variable annular limitation groove in the circumferential direction of the rotating shaft to thereby drive the piston rod (7) to make a reciprocating movement depending on the size change in radius of the diameter-variable annular limitation groove. The present invention may change the number of the piston air pump members so as to keep the structure simple and compact while increasing the air flow rate of the air pump, the piston rod performs a reciprocating movement uniformly and stably, and a plurality of pairs of the piston air pump members are installed at the same height, thereby reducing the volume in the shaft direction of the vacuum air pump.

Dependencies are inferred from the claim text.