Motor of pneumatic tool

Abstract

There is disclosed a motor of a pneumatic tool. The motor includes a cylinder, a rotor put in the cylinder, a plurality of leaves movable to the cylinder from the rotor in operation, a front cover connected to a front end of the cylinder, a rear cover connected to a rear end of the cylinder, a front pad put between the rotor and the front cover and between the leaves and the front cover, and a rear pad put between the rotor and the rear cover and between the leaves and the rear cover.

1 . A motor comprising: 
 a cylinder;    a rotor put in the cylinder;    a plurality of leaves movable to the cylinder from the rotor in operation;    a front cover connected to a front end of the cylinder;    a rear cover connected to a rear end of the cylinder;    a front pad for preventing the rotor and the leaves from wearing away the front cover, wherein the front pad is harder than the front cover; and    a rear pad for preventing the rotor and the leaves from wearing away the rear cover, wherein the rear pad is harder than the rear cover.    
   
   
       2 . The motor according to  claim 1  wherein the front and rear pads are made of steel.  
   
   
       3 . The motor according to  claim 2  wherein the hardness of the front and rear pads is at least equal to HRC 60.  
   
   
       4 . The motor according to  claim 3  wherein the front and rear pads are made of SCM steel.  
   
   
       5 . The motor according to  claim 1  wherein the front and rear covers are made of aluminum.