Polishing apparatus with dustproof housing

Abstract

A polishing apparatus includes at least one dustproof housing, at least one polishing wheel, and at least one exhaust tube. Each dustproof housing includes a back wall, a plurality of sidewalls extending from the periphery of the back wall, and a front wall opposite to the back wall. The front wall of the dustproof housing defines a working opening and an exhaust opening positioned below the working opening. Each polishing wheel is received in the working opening. Each dust collector is received in one dustproof housing below the polishing wheel, and exposed to the outside via the exhaust opening. Each exhaust tube is fixed to the back wall of the dustproof housing and communicating with the interior of the dustproof housing.

What is claimed is: 
     
         1 . A polishing apparatus, comprising:
 at least one dustproof housing comprising a back wall, a plurality of sidewalls extending from the periphery of the back wall, and a front wall opposite to the back wall, the front wall of the dustproof housing defining a working opening and an exhaust opening below the working opening;   a polishing wheel received in the working opening;   a dust collector received in the dustproof housing located below the polishing wheel, and exposed to the outside via the exhaust opening; and   an exhaust tube fixed to the back wall of the dustproof housing and communicating with the interior of the dustproof housing.   
     
     
         2 . The polishing apparatus of  claim 1 , further comprises a sliding guide positioned in the inner surface of the dustproof housing between the working opening and the exhaust opening, the dust collector is a V-shaped funnel, and the larger end of the dust collector is slidably engaged with the sliding guide. 
     
     
         3 . The polishing apparatus of  claim 1 , wherein both of the working opening and the exhaust opening are covered with a transparent cover. 
     
     
         4 . The polishing apparatus of  claim 3 , wherein the transparent cover, covering on the working opening, defines a feed opening. 
     
     
         5 . The polishing apparatus of  claim 1 , further comprises a shielding board fixed in the dustproof housing above the polishing wheel. 
     
     
         6 . The polishing apparatus of  claim 1 , further comprises a working light positioned on the outer surface of the front wall of the dustproof housing above the working opening. 
     
     
         7 . The polishing apparatus of  claim 1 , wherein an angle of the exhaust tube relative to the back wall is in a range from about 70 degrees to about 80 degrees to enable smooth airflow. 
     
     
         8 . The polishing apparatus of  claim 7 , wherein the angle of the exhaust tube relative to the back wall is 75 degrees.