Power file for narrow processing environments

Abstract

A power file is driven by an external power source and has a body, a socket, and a driven module. The body is connected to the external power source and has a driving portion having a driving axle. The socket is rotatably engaged with the body. The driven module is disposed in the socket, is connected to the body, and has a swinging unit and a fastening member. The swinging unit is eccentrically connected to the driving axle. The fastening member forms an angle with the driving portion and includes a middle portion, a pivoting end, and a connecting end. The middle portion is swingably connected to the socket. The pivoting end of the fastening member is pivotally connected to the swinging unit. The connecting end of the fastening member protrudes out of the socket.

What is claimed is: 
     
         1 . A power file that is driven by an external power source, the power file comprising:
 a body connected to the external power source and having
 a driving portion comprising a driving axle; 
   a socket rotatably engaged with the body; and   a driven module disposed in the socket, connected to the body, and having
 a swinging unit eccentrically connected to the driving axle; and 
 a fastening member forming an angle with the driving portion and comprising
 a middle portion swingably connected to the socket; 
 a pivoting end pivotally connected to the swinging unit; and 
 a connecting end protruding out of the socket. 
 
   
     
     
         2 . The power file as claimed in  claim 1 , wherein the socket further comprises:
 an installation chamber inserted by the driving portion and having
 a groove radially disposed beside the installation chamber; and 
   a pushing block disposed in the groove and being able to press the driving portion.   
     
     
         3 . The power file as claimed in  claim 2 , wherein the body further has a connecting portion connected to the external power source and mounted inclinedly to the driving portion. 
     
     
         4 . The power file as claimed in  claim 1 , wherein the driven module further comprises:
 a driving block concentrically screwed with the driving axle, and eccentrically mounted to the swinging unit; and   a restricting unit firmly mounted to the socket, and pivotally connected to the fastening member.   
     
     
         5 . The power file as claimed in  claim 2 , wherein the driven module further comprises:
 a driving block concentrically screwed with the driving axle, and eccentrically mounted to the swinging unit; and   a restricting unit firmly mounted to the socket, and pivotally connected to the fastening member.   
     
     
         6 . The power file as claimed in  claim 3 , wherein the driven module further comprises:
 a driving block concentrically screwed with the driving axle, and eccentrically mounted to the swinging unit; and   a restricting unit firmly mounted to the socket, and pivotally connected to the fastening member.   
     
     
         7 . The power file as claimed in  claim 4 , wherein the swinging unit further has:
 a ball joint eccentrically connected to the driving block via a rolling bearing; and   a pivoting portion pivotally connected to the fastening member.   
     
     
         8 . The power file as claimed in  claim 5 , wherein the swinging unit further has:
 a ball joint eccentrically connected to the driving block via a rolling bearing; and   a pivoting portion pivotally connected to the fastening member.   
     
     
         9 . The power file as claimed in  claim 6 , wherein the swinging unit further has:
 a ball joint eccentrically connected to the driving block via a rolling bearing; and   a pivoting portion pivotally connected to the fastening member.   
     
     
         10 . The power file as claimed in  claim 9 , wherein the restricting unit and the fastening member are pivotally connected via a pivoting bolt, and a thrust bearing is disposed between the restricting unit and the fastening member. 
     
     
         11 . The power file as claimed in  claim 1 , wherein
 the body further has
 an extending portion connected to the driving portion and having
 a transmission shaft concentrically connected to the driving axle; and 
 
   the socket further has
 an installation chamber inserted by the extending portion and having
 a groove radially disposed beside the installation chamber; and 
 
 a pushing block disposed in the groove and being able to press the extending portion. 
   
     
     
         12 . The power file as claimed in  claim 11 , wherein the body further has:
 a transmitting portion comprising
 a first block engaged with the driving axle; and 
 a second block engaged with the transmission shaft and the first block. 
   
     
     
         13 . The power file as claimed in  claim 12 , wherein the body further has:
 a connecting portion connected to the external power source and mounted inclinedly to the driving portion.   
     
     
         14 . The power file as claimed in  claim 11 , wherein the driven module further comprises:
 a driving block concentrically screwed with the driving axle, and eccentrically mounted to the swinging unit; and   a restricting unit firmly mounted to the socket, and pivotally connected to the fastening member.   
     
     
         15 . The power file as claimed in  claim 12 , wherein the driven module further comprises:
 a driving block concentrically screwed with the driving axle, and eccentrically mounted to the swinging unit; and   a restricting unit firmly mounted to the socket, and pivotally connected to the fastening member.   
     
     
         16 . The power file as claimed in  claim 13 , wherein the driven module further comprises:
 a driving block concentrically screwed with the driving axle, and eccentrically mounted to the swinging unit; and   a restricting unit firmly mounted to the socket, and pivotally connected to the fastening member.   
     
     
         17 . The power file as claimed in  claim 14 , wherein the swinging unit further has:
 a ball joint eccentrically connected to the driving block via a rolling bearing; and   a pivoting portion pivotally connected to the fastening member.   
     
     
         18 . The power file as claimed in  claim 15 , wherein the swinging unit further has:
 a ball joint eccentrically connected to the driving block via a rolling bearing; and   a pivoting portion pivotally connected to the fastening member.   
     
     
         19 . The power file as claimed in  claim 16 , wherein the swinging unit further has:
 a ball joint eccentrically connected to the driving block via a rolling bearing; and   a pivoting portion pivotally connected to the fastening member.   
     
     
         20 . The power file as claimed in  claim 19 , wherein the restricting unit and the fastening member are pivotally connected via a pivoting bolt, and a thrust bearing is disposed between the restricting unit and the fastening member.