Floor Working machine

Abstract

A floor working machine includes a body frame ( 1 ), an electric drive unit ( 29 ), a pad unit including a first pad ( 21 ) and a second pad ( 21 ) having polishing surfaces ( 21 a ) for contacting a floor surface, the first pad and second pad being opposed to each other, and a pad control mechanism ( 50 ) for controlling the pad unit by using drive of the electric drive unit. The pad control mechanism ( 50 ) controls the first pad ( 21 ) and second pad ( 21 ) such that the first pad and second pad reciprocate, with the respective polishing surfaces ( 21 a ) contacting the floor surface, in a first direction (A) in which the first pad and second pad approach each other and in a second direction (B) in which the first pad and second pad move away from each other. A guiding device ( 23, 25 ) guides the first pad and second pad in reciprocating movement such that the first direction and second direction are linear and parallel to the floor surface.

What is claim is:  
     
         1 . A floor working machine with: 
 a body frame;    an electric drive unit;    a pad unit including a first pad and a second pad having polishing surfaces for contacting a floor surface, said first pad and second pad being opposed to each other;    a pad control mechanism for controlling said pad unit by using drive of said electric drive unit such that said first pad and second pad reciprocate, with the respective polishing surfaces contacting the floor surface, in a first direction in which said first pad and second pad approach each other and in a second direction in which said first pad and second pad move away from each other; and    guide means for guiding said first pad and second pad in reciprocating movement such that said first direction and second direction are linear and parallel to the floor surface.    
     
     
         2 . A floor working machine as defined in  claim 1 , wherein said guide means includes linear rails, and sliders for sliding along said linear rails.  
     
     
         3 . A floor working machine as defined in  claim 2 , wherein said linear rails are supported said body frame as guide rails common to said first pad and second pad, at least one of said sliders being supported by said first pad, and at least another of said sliders being supported by said second pad.  
     
     
         4 . A floor working machine as defined in  claim 1 , wherein said pad control mechanism is constructed as a rotational displacement to linear displacement converting eccentric mechanism for converting a rotational displacement from said electric drive unit into a linear reciprocation of said first pad and second pad toward and away from each other.  
     
     
         5 . A floor working machine as defined in  claim 4 , wherein said rotational displacement to linear displacement converting eccentric mechanism includes a drive gear connected to an output shaft of said electric drive unit to be rotatable together, a plurality of driven gears meshed with said drive gear, eccentric cams provided for said driven gears, respectively, and linear cam followers provided for said pads for engaging said eccentric cams, respectively.  
     
     
         6 . A floor working machine as defined in  claim 4 , wherein said rotational displacement to linear displacement converting eccentric mechanism includes a drive gear connected to an output shaft of said electric drive unit to be rotatable together, a plurality of driven gears meshed with said drive gear, and slider/crank mechanism links extending between said driven gears and said pads, respectively.  
     
     
         7 . A floor working machine as defined in  claim 1 , further comprising a cleaning solution supplying device for supplying a cleaning solution to the floor surface at least between said first pad and second pad.  
     
     
         8 . A floor working machine as defined in  claim 1 , wherein said first direction and second direction correspond to a traveling direction of said working machine.  
     
     
         9 . A floor working machine as defined in  claim 1 , wherein said floor working machine is movable by an operator over the floor surface to be polished.  
     
     
         10 . A floor working machine as defined in  claim 1 , wherein said floor working machine is self-propelled to move over on the floor surface to be polished.