Sander

Abstract

A sander has a base, a rotating assembly, multiple abrasive assemblies, multiple driving assemblies and multiple reciprocating assemblies. The rotating assembly is rotatably mounted on the base on an axis that is parallel to a Z-axis and has a bottom end. The abrasive assemblies move linearly and reciprocatorily in a plane parallel to an X-Y plane and are rotatably mounted on the bottom end of the rotating assembly. The driving assemblies are respectively connected to and drive the abrasive assemblies to rotate. The reciprocating assemblies are mounted securely on the rotating assembly to linearly and reciprocatorily drive the abrasive assemblies in a plane parallel to the X-Y plane. A linear reciprocating direction of each abrasive assembly is opposite to that of an adjacent abrasive assembly.

1 . A sander comprising:
 a base having
 a body having
 a top end; and 
 a supporting frame mounted securely on the top end of the body and having a top end and a bottom end; and 
 
 a conveyer belt mounted movably through the body parallel to a Y-axis and below the supporting frame; 
   a rotating assembly rotatably mounted on the base in an axis that is parallel to a Z-axis, above the conveyer belt and having a bottom end;   multiple abrasive assemblies moving linearly and reciprocatorily in a plane parallel to an X-Y plane and rotatably mounted on the bottom end of the rotating assembly, each abrasive assembly moving reciprocatorily in a linear direction opposite to that of an adjacent abrasive assembly and having
 a rotating axle mounted rotatably on the bottom end of the rotating assembly and parallel to the X-Y plane; 
   multiple driving assemblies respectively connected to and driving the abrasive assemblies to rotate; and   multiple reciprocating assemblies mounted securely on the rotating assembly to linearly and reciprocatorily drive the abrasive assemblies parallel to the X-Y plane.   
     
     
         2 . The sander as claimed in  claim 1 , wherein
 the rotating assembly has
 a rotatable rotating bracket having a top and a bottom; and 
 multiple fixing mounts corresponding to the abrasive assemblies, mounted securely on the bottom of the rotating bracket, parallel to each other, parallel to the X-Y plane and each fixing mount having 
 two linear rods, each rod having
 a driving end; 
 a reciprocating end; and 
 a central segment; and 
 
 a driving mount having
 a first driving bracket mounted slidably around the driving ends of both of the rods and having a top and a bottom; and 
 a second driving bracket mounted securely on the bottom of the first driving bracket; 
 
 a reciprocating mount having
 a first reciprocating bracket mounted slidably around the reciprocating ends of both of the rods and having a bottom; and 
 a second reciprocating bracket mounted securely on the bottom of the first reciprocating bracket; 
 
   each abrasive assembly is mounted rotatably on the second driving bracket and the second reciprocating bracket of a corresponding fixing element; and   each driving assembly is mounted securely on a corresponding first driving bracket; and   each reciprocating assembly is mounted securely on the first driving bracket and the first reciprocating bracket of a corresponding fixing element.   
     
     
         3 . The sander as claimed in  claim 2 , wherein
 each rotating axle has
 one end; and 
 multiple engaging teeth axially defined around the end of the rotating axle; and 
   each abrasive assembly has
 an axle stand mounted securely around the end of the rotating axle, mounted rotatably in and protruding from the corresponding second driving bracket and having
 an inner surface; 
 multiple engaging grooves defined axially in the inner surface of the axle stand and engaging the engaging teeth; and 
 a distal end; and 
 
 a pulley mounted securely around the distal end of the axle stand. 
   
     
     
         4 . The sander as claimed in  claim 2 , wherein
 each reciprocating assembly has
 a reciprocating motor mounted on the top of the rotating bracket; 
 a reduction gear mounted on the rotating bracket above a corresponding reciprocating mount and connected to the reciprocating motor; 
 a gear shaft connected rotatably to the reduction gear and parallel to the Z-axis and having a bottom end; 
 a first lever mounted securely on the bottom end of the gear shaft and having a distal end; 
 a pivot mounted rotatably on the distal end of the first lever and parallel to the Z-axis and having a bottom end; 
 a second lever mounted securely around the bottom end of the pivot and having a distal end; 
 a connecting shaft connected rotatably on the distal end of the second lever and having a bottom end; and 
 a driven bar mounted securely around the bottom end of the connecting shaft and having
 two ends respectively mounted securely on the first driving bracket and the first reciprocating bracket of a corresponding fixing mount. 
 
   
     
     
         5 . The sander as claimed in  claim 3 , wherein
 each driving assembly has
 a U-shaped mount mounted securely on the top of one of the first driving brackets and having a top; 
 a motor stand mounted pivotally on the top of the U-shaped mount and having a top; 
 a driving motor mounted securely on the top of the motor stand and having
 a motor wheel mounted rotatably on the driving motor; and 
 
 a driving belt mounted around the motor wheel and the pulley. 
   
     
     
         6 . The sander as claimed in  claim 2 , wherein
 each fixing mount has   two rod stands mounted securely around the central segments of both of the rods.