Semi-manual machine tool for treating flat and horizontal surfaces

Abstract

Disclosed is a semi-manual machine tool for treating flat horizontal surfaces, this machine including: a base; a drive plate connected to the base having a lower face adapted to be connected to a working tool; a motor; a transmission system between the motor and the drive plate; a handle for controlling the machine; and a working tool connected to the lower face of the drive plate. The drive plate is connected to the base in a manner sliding along a direction parallel to the direction of translation of the machine tool, i.e., parallel to the longitudinal axis of the machine tool, the transmission system being configured to impart to the drive plate a reciprocating rectilinear movement along the longitudinal direction.

1 . A semi-manual machine tool for treating flat horizontal surfaces, said machine comprising:
 a base;   a drive plate connected to the base having a lower face adapted to be connected to a working tool;   a motor;   a transmission system between said motor and said drive plate;   a handle for controlling the machine; and   a working tool connected to the lower face of the drive plate;   wherein the drive plate is connected to the base in a manner sliding along a direction parallel to the direction of translation of the machine tool, i.e., parallel to the longitudinal axis of the machine tool, said transmission system being configured to impart to said drive plate a reciprocating rectilinear movement along said longitudinal direction.   
     
     
         2 . The machine tool according to  claim 1 , wherein the contact area between the working tool and the surface to be treated has an extension in width greater than the extension in depth of the surface to be treated. 
     
     
         3 . The machine tool according to  claim 2 , wherein a ratio of the extension in width to the extension in depth is in a range of 1 to 6. 
     
     
         4 . The machine tool according to  claim 2 , wherein the tool has the same form and dimension as the drive plate. 
     
     
         5 . The machine tool according  claim 1 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm. 
     
     
         6 . The machine tool according to  claim 1 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate. 
     
     
         7 . The machine tool according to  claim 1 , wherein the transmission system comprises a belt that transmits the rotary motion from a first pulley, mounted on the motor shaft, to a second pulley mounted on a second shaft pivoted in the base or in the motor mount, said transmission system further comprising a crank-connecting rod mechanism, connected to the drive plate, to convert the rotary motion of the second pulley into a reciprocating rectilinear motion of said drive plate. 
     
     
         8 . The machine tool according to  claim 1 , comprising wheels configured to move said machine tool along a rectilinear direction parallel to the longitudinal axis. 
     
     
         9 . The machine tool according to  claim 8 , comprising a motor mount, integral with the base, said motor being arranged on the motor mount so that the ratio dr/dp ranges from 0.5 to 2, where dr is the distance of the rotation axis of the motor from the axis of the wheels and dp is the distance from the centreline of the drive plate, taken in longitudinal direction, from the axis of said wheels. 
     
     
         10 . The machine tool according to  claim 1 , wherein the handle for controlling the machine comprises a steering rod which is connected to the motor mount so that the distance between the connection point of said rod and the axis of the motor, taken along the longitudinal direction, is no greater than 150 mm toward the front or rear part of the machine. 
     
     
         11 . The machine tool according to  claim 1 , comprising a water dispenser arranged close to the front side of the base. 
     
     
         12 . The machine tool according to  claim 1 , wherein said working tool is chosen from a felt polishing disc, a brush disc, an abrasive cloth disc, an abrasive mesh disc or a nonwoven disc. 
     
     
         13 . The machine tool according to  claim 3 , wherein the tool has the same form and dimension as the drive plate. 
     
     
         14 . The machine tool according to  claim 2 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm. 
     
     
         15 . The machine tool according to  claim 3 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm. 
     
     
         16 . The machine tool according to  claim 4 , wherein the drive plate performs a movement with a range of travel from 5 to 30 mm. 
     
     
         17 . The machine tool according to  claim 2 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate. 
     
     
         18 . The machine tool according to  claim 3 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate. 
     
     
         19 . The machine tool according to  claim 4 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate. 
     
     
         20 . The machine tool according to  claim 5 , comprising at least one linear guide means for guiding the reciprocating rectilinear movement of the drive plate, said linear guide means comprising at least one linear guide with a track fixed to the lower side of the base and a slide, sliding on the track, integral with the drive plate.