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.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a vacuum air pump and a glass-wiping device, belonging to the technical field of mechanical manufacturing.BACKGROUND OF THE PRIOR ART[0002]A glass-wiping robot in the prior art automatically cleans a glass by allowing a suction cup on the bottom of the machine body to be adsorbed onto the glass. The vacuum degree in the suction cup is generated by the vacuum air pump constantly performing pumping. The vacuum air pump in the prior art generally accomplishes the vacuum-pumping motion such that a motor drives two symmetrically installed pistons to perform reciprocating movement. FIG. 1 is a structural perspective view of the vacuum air pump in the prior art; and FIG. 2 is a sectional view of the vacuum air pump in the prior art. As shown in FIG. 1 in combination with FIG. 2, the vacuum air pump includes two cylinders A and B each having one air inlet hole 100A or 100B and one air outlet hole 200A or 200B, wherein the air inle...

AI Technical Summary

Benefits of technology

The present invention provides a vacuum air pump and glass-wiping device that can increase the air flow rate without losing vacuum quickly. The vacuum air pump has a simple and compact structure and allows for an increased number of piston air pump members as needed. The rolling element (e.g. bearing or roller) reduces wear and the air pump's structure ensures uniform and stable movement of the piston rods and reduces the volume in the shaft direction. This glass-wiping device effectively prevents the machine body from falling off the glass surface.

Problems solved by technology

The above vacuum air pump uses only a pair of pistons for vacuum pumping and thus the air flow of the air pump is small, and if the suction cup is lifted by particles on the glass surface, it will lose the vacuum degree soon, thereby making the machine body fall off the glass surface.

As a result, the vacuum air pump will have a larger shaft length, and thus has a complicated and non-compact structure, which will significantly affect the appearance and volume of the glass-wiping robot.

Images