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.

1 . A vacuum air pump comprises a driving motor ( 2 ), an air pump body ( 1 ) and a piston air pump member ( 15 ) provided on the air pump body, characterized in that, a rotating shaft ( 3 ) is provided in the air pump body ( 1 ), the driving motor ( 2 ) transmits power to the rotating shaft ( 3 ) via a transmission mechanism, a rotating wheel is fixed on the rotating shaft ( 3 ), a diameter-variable annular limitation groove ( 5 ) is formed in one side surface of the rotating wheel; at least two piston air pump members ( 15 ) are provided around the air pump body ( 1 ), a piston rod ( 7 ) of each of the piston air pump members ( 15 ) is provided with a rolling element ( 6 ) at the end thereof, the rolling element ( 6 ) is embedded in the diameter-variable annular limitation groove ( 5 ), the rotating shaft ( 3 ) drives the rotating wheel to rotate, and the rolling element ( 6 ) rolls within the diameter-variable annular limitation groove ( 5 ) along the circumferential direction of the rotating shaft ( 3 ) 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. 
     
     
         2 . The vacuum air pump of  claim 1 , characterized in that, the diameter-variable annular limitation groove ( 5 ) is an eccentric groove, an irregularly-shaped groove or an elliptical groove. 
     
     
         3 . The vacuum air pump of  claim 1 , characterized in that, the piston air pump members ( 15 ) are provided around the air pump body ( 1 ) in pairs. 
     
     
         4 . The vacuum air pump of  claim 3 , characterized in that, the piston air pump members ( 15 ) are well-distributed provided in the circumferential direction of the rotating wheel at an equal angel interval. 
     
     
         5 . The vacuum air pump of  claim 3 , characterized in that, the pair number of the piston air pump members ( 15 ) is one to three. 
     
     
         6 . The vacuum air pump of  claim 5 , characterized in that, the outer shape of the air pump body ( 1 ) is a polygon prism or a cylinder. 
     
     
         7 . The vacuum air pump of  claim 4 , characterized in that, the air pump body ( 1 ) is provided with a positioning groove ( 9 ), the position of the positioning groove ( 9 ) corresponds to the position where the piston air pump member ( 15 ) is provided, and the shape of the positioning groove ( 9 ) corresponds to the outer shape of the piston air pump member ( 15 ). 
     
     
         8 . The vacuum air pump of  claim 1 , characterized in that, the transmission mechanism comprises a synchronous wheel ( 10 ) provided on the shaft of the driving motor and a synchronous belt wheel ( 11 ) provided on the rotating shaft ( 3 ), wherein the synchronous wheel ( 10 ) and the synchronous belt wheel ( 11 ) are connected to each other via a synchronous belt ( 12 ). 
     
     
         9 . The vacuum air pump of  claim 1 , characterized in that, the transmission mechanism comprises a driving gear provided on the shaft of the driving motor and a driven gear provided on the rotating shaft, wherein the driving gear and the driven gear are engaged with each other. 
     
     
         10 . The vacuum air pump of  claim 1 , characterized in that, the rolling element ( 6 ) is a bearing or a roller. 
     
     
         11 . A glass-wiping device comprises a suction unit and a walking unit, the glass-wiping device is adsorbed onto the glass surface through the suction unit, the suction unit includes a suction cup and a vacuum air pump, and the vacuum air pump supplies a vacuum suction force for the suction cup, characterized in that, the vacuum air pump is the vacuum air pump of  claim 1 .