Grinding device

Abstract

A grinding device for grinding a cylinder that has a rotating shaft includes an immovable component, a movable component, and a grinding component. The immovable component has a positioning unit. The cylinder has the rotating shaft positioned by the positioning unit. The movable component has a carrying portion and is such installed on the immovable component that the movable component can move axially along the rotating shaft. The carrying portion positionally corresponds to the cylinder. The grinding component is located on the carrying portion and positionally corresponds to a surface of the rotating shaft. The grinding device thereby is able to grind the rotating shaft of the cylinder evenly with reduced labor costs.

What is claimed is: 
     
         1 . A grinding device, for grinding a cylinder that has a rotating shaft, the grinding device comprising:
 an immovable component, having a positioning unit on which the cylinder is such mounted that the cylinder is rotatable against the rotating shaft;   a movable component, having a carrying portion, wherein the movable component is such installed that on the immovable component that the movable component is moveable axially along the rotating shaft, and the carrying portion positionally corresponds to the cylinder; and   a grinding component, being installed on the carrying portion and positionally corresponding to a surface of the rotating shaft.   
     
     
         2 . The grinding device of  claim 1 , wherein the immovable component further comprises a carrying surface, and the positioning unit of the immovable component comprises two posts, two fixing shafts, and a positioning space, in which the two posts are installed on the carrying surface, and each of the two fixing shafts is located on one end of one said post, while the positioning space is defined between the two fixing shafts, so that when the cylinder is placed in the positioning space, the two fixing shafts abut against two ends of the rotating shaft of the cylinder, respectively. 
     
     
         3 . The grinding device of  claim 1 , wherein the immovable component further comprises a driving unit that is configured to drive the cylinder to rotate against the rotating shaft. 
     
     
         4 . The grinding device of  claim 1 , wherein the immovable component further comprises a driven unit that is configured to drive the movable component to move axially to and fro along the rotating shaft. 
     
     
         5 . The grinding device of  claim 1 , wherein the carrying portion of the movable component comprises two notches for receiving two ends of the rotating shaft of the cylinder, respectively, and the grinding component is located by the two notches and contacts the two ends of the rotating shaft. 
     
     
         6 . The grinding device of  claim 5 , wherein each of the two notches comprises a clip slot, and the grinding component is received in the clip slots and contacts the surface of the rotating shaft.