Auto-scraping apparatus

Abstract

An auto-scraping apparatus for a work piece of a hard rail has a driving device, a linking device and a tool device. The driving device has a connecting frame, a driving motor and a cam. The driving motor is mounted in the connecting frame. The cam is mounted on a bottom of the connecting frame and has an abutting face. The linking device is connecting to the driving device and has a main frame, an upper connecting arm, a lower connecting arm, a linking arm and a rotating wheel. The main frame is connected to the driving motor. The connecting arms are pivotally connected to the main frame and the linking arm. The rotating wheel is rotatably mounted on the upper connecting arm and abuts the abutting face of the cam. The tool device is connected to the linking device and has a tool carrier and a relieving tool.

1 . An auto-scraping apparatus comprising:
 a driving device having
 a connecting frame having
 a top; and 
 a bottom; 
 
 a driving motor securely mounted in the connecting frame and having
 a bottom; and 
 a driving shaft rotatably connected to the bottom of the driving motor, extending out of the bottom of the connecting frame and having a free end; and 
 
 a cam securely mounted on the bottom of the connecting frame beside the driving shaft of the driving motor and having
 a top side securely mounted on the bottom of the connecting frame; 
 a bottom side; 
 a width; 
 a middle; 
 two ends; and 
 an abutting face being wavy and formed on the bottom side of the cam; 
 
   a linking device securely connected to the driving device and having
 a main frame securely connected to the driving motor and having
 a top side securely mounted around the free end of the driving shaft of the driving motor; and 
 a bottom side; 
 
 an upper connecting arm pivotally connected to the main frame near the top side of the main frame and having
 a connecting end opposite to the main frame; and 
 a top side; 
 
 a lower connecting arm pivotally connected to the main frame near the bottom side of the main frame under the upper connecting arm and having
 a connecting end opposite to the main frame; and 
 a bottom side; 
 
 a linking arm pivotally connected to the connecting ends of the connecting arms to form a four-bar-mechanism with the main frame; and 
 a rotating wheel rotatably mounted on the top side of the upper connecting arm near the connecting end and abutting the abutting face of the cam; and 
   a tool device detachably connected to the linking device and having
 a tool carrier securely mounted on the bottom side of the lower connecting arm; and 
 a relieving tool securely mounted on the tool carrier. 
   
     
     
         2 . The auto-scraping apparatus as claimed in  claim 1 , wherein the connecting frame has a connecting rod formed on and protruding from the top of the connecting frame to connect to a spindle of a Computerized Numerical Control machine tool. 
     
     
         3 . The auto-scraping apparatus as claimed in  claim 2 , wherein the rotating wheel has two holding mounts securely mounted on the top side of the upper connecting arm to hold the rotating wheel on the upper connecting arm. 
     
     
         4 . The auto-scraping apparatus as claimed in  claim 3 , wherein
 the tool carrier has a mounting surface opposite to the lower connecting arm; and   the relieving tool is securely mounted on the mounting surface of the tool carrier.   
     
     
         5 . The auto-scraping apparatus as claimed in  claim 4 , wherein the width of the cam at the middle is wider than the widths of the cam at the ends. 
     
     
         6 . The auto-scraping apparatus as claimed in  claim 5 , wherein
 the cam is semicircular; and   the main frame is U-shaped.   
     
     
         7 . The auto-scraping apparatus as claimed in  claim 1 , wherein the rotating wheel has two holding mounts securely mounted on the top side of the upper connecting arm to hold the rotating wheel on the upper connecting arm. 
     
     
         8 . The auto-scraping apparatus as claimed in  claim 1 , wherein
 the tool carrier has a mounting surface opposite to the lower connecting arm; and   the relieving tool is securely mounted on the mounting surface of the tool carrier.   
     
     
         9 . The auto-scraping apparatus as claimed in  claim 1 , wherein the width of the cam at the middle is wider than the widths of the cam at the ends. 
     
     
         10 . The auto-scraping apparatus as claimed in  claim 1 , wherein
 the cam is semicircular; and   the main frame is U-shaped.