Electric polishing gun

Abstract

An electric polishing gun has a body, a rechargeable battery, a drive motor, a transmitting device and an actuating device. The body has a battery seat, a handle section, a circuit board, a switch, a trigger and a holding cap. The rechargeable battery is attached detachably to the battery seat of the body to supply electric power to the electric polishing gun. The drive motor is mounted in the body, is electrically connected to switch, the trigger and the rechargeable battery and has a rotating shaft and multiple engaging teeth. The transmitting device is connected to the drive motor, is mounted in the holding cap and has a bevel gear and a mounting bracket. The actuating device is connected detachably to the transmitting device and has a cover, a drive shaft, an eccentric segment and an actuating segment.

1 . An electric polishing gun having
 a body having
 a top end; 
 a lower end; 
 a middle; 
 a battery seat being obliquely formed on the lower end of the body; 
 a handle section being defined in the middle of the body and having
 a top end; 
 a lower end; 
 a front; 
 a rear; 
 a mounting recess being formed in the lower end of the handle section near the battery seat; and 
 a chamber being formed in the top end of the handle section and communicating with the mounting recess; 
 
 a circuit board being mounted in the mounting recess; 
 a switch being mounted in the mounting recess and being electrically connected to the circuit board; 
 a trigger being mounted in the front of the handle section and contacting with the switch when being pulled; and 
 a holding cap being connected to the top end of the body and having
 a front end; 
 an opening being formed in the front end of the holding cap; and 
 
   a rechargeable battery being attached detachably to the battery seat of the body and electrically connected to the circuit board to supply electric power to the electric polishing gun;   a drive motor being mounted in the chamber of the body, being electrically connected to switch, the trigger and the rechargeable battery and having
 an upper end; 
 a rotating shaft being rotatably connected to the upper end of the drive motor and having
 an external surface; and 
 a top end; and 
 
 multiple engaging teeth being formed around the external surface of the rotating shaft near the top end of the rotating shaft; 
   a transmitting device being connected to the drive motor, being mounted in the holding cap of the body and having
 a bevel gear being rotatably mounted in the holding cap from the opening and having
 a rear side; 
 a center; 
 multiple engaging teeth being formed on the rear side of the bevel gear and engaging the engaging teeth of the drive motor; and 
 a mounting hole being formed through the center of the bevel gear; and 
 
 a mounting bracket being mounted on the front end of the holding cap of the body to hold the bevel gear between the holding cap and the mounting bracket; and 
   an actuating device being connected detachably to the transmitting device and having
 a cover being mounted around the mounting bracket and communicating with the opening of the holding cap; 
 a drive shaft being mounted securely in the bevel gear from the cover and the holding cap and having
 an external surface; 
 an engaging end extending through the cover and the front end of the mounting bracket and being mounted in the mounting hole of the bevel gear; and 
 a threaded end extending through the collar of the cover and being mounted in the cover; 
 
 an eccentric segment being connected to the threaded end of the drive shaft; and 
 an actuating segment being connected detachably to the eccentric segment. 
   
   
   
       2 . The electric polishing gun as claimed in  claim 1 , wherein
 the eccentric segment has
 a rear eccentric wheel being mounted around the threaded end of the drive shaft and having
 a rear side; 
 a front side; 
 an external surface; and 
 a screwed hole being eccentrically formed in the rear side of the rear eccentric wheel and being screwed with the threaded end of the drive shaft; and 
 
 a front eccentric wheel being eccentrically formed on the front side of the rear eccentric wheel and having
 a front side; 
 an external surface; and 
 a connecting hole being formed in the front end of the front eccentric wheel; and 
 
   the actuating segment has
 a panel being connected detachably to the front eccentric wheel and having
 a rear side; 
 a front side; and 
 a connecting rod being formed on and protruding from the rear side of the panel and being mounted in the connecting hole of the front eccentric wheel; and 
 
 a polishing element being mounted around the front side of the panel. 
   
   
   
       3 . The electric polishing gun as claimed in  claim 2 , wherein the eccentric segment further has two balancing elements being respectively mounted on the external surfaces of the eccentric wheels. 
   
   
       4 . The electric polishing gun as claimed in  claim 3 , wherein
 the bevel gear further has a keyhole being formed through the bevel gear and communicating with the mounting hole; and   the drive shaft further has a key block being formed on and protruding from the external surface of the drive shaft near the engaging end and engaging keyhole in the bevel gear to connect the drive shaft with the bevel gear.   
   
   
       5 . The electric polishing gun as claimed in  claim 4 , wherein
 the body further has a speed governor being rotatably mounted in the rear of the handle section and being electrically connected to the circuit board to adjust a rotating speed of the drive motor; and   the trigger further has a locking element being movably mounted in the front of the handle section by a spring to make the trigger contacting with the front of the handle section when pressing the trigger.   
   
   
       6 . The electric polishing gun as claimed in  claim 5 , wherein the body further has an auxiliary handle being mounted on and protruding from the sidewall of the holding cap. 
   
   
       7 . The electric polishing gun as claimed in  claim 6 , wherein
 the holding cap is connected to the top end of the body by multiple fasteners; and   the mounting bracket is mounted on the front end of the holding cap of the body by multiple fasteners to hold the bevel gear between the holding cap and the mounting bracket.   
   
   
       8 . The electric polishing gun as claimed in  claim 7 , wherein
 the mounting bracket has
 a front end; and 
 a mounting barrel being formed on the front end of the mounting bracket; and 
   the cover has
 a rear end; and 
 a collar being formed on the rear end of the cover and being mounted around the mounting barrel of the mounting bracket. 
   
   
   
       9 . The electric polishing gun as claimed in  claim 8 , wherein the body is hollow and is composed of two half-casings. 
   
   
       10 . The electric polishing gun as claimed in  claim 9 , wherein the polishing element is a sponge. 
   
   
       11 . The electric polishing gun as claimed in  claim 9 , wherein the polishing element is a wax paper sheet. 
   
   
       12 . The electric polishing gun as claimed in  claim 1 , wherein
 the bevel gear further has a keyhole being formed through the bevel gear and communicating with the mounting hole; and   the drive shaft further has a key block being formed on and protruding from the external surface of the drive shaft near the engaging end and engaging keyhole in the bevel gear to connect the drive shaft with the bevel gear.   
   
   
       13 . The electric polishing gun as claimed in  claim 1 , wherein
 the body further has a speed governor being rotatably mounted in the rear of the handle section and being electrically connected to the circuit board to adjust a rotating speed of the drive motor; and   the trigger further has a locking element being movably mounted in the front of the handle section by a spring to make the trigger contacting with the front of the handle section when pressing the trigger.   
   
   
       14 . The electric polishing gun as claimed in  claim 1 , wherein the body further has an auxiliary handle being mounted on and protruding from the sidewall of the holding cap. 
   
   
       15 . The electric polishing gun as claimed in  claim 1 , wherein
 the holding cap is connected to the top end of the body by multiple fasteners; and   the mounting bracket is mounted on the front end of the holding cap of the body by multiple fasteners to hold the bevel gear between the holding cap and the mounting bracket.   
   
   
       16 . The electric polishing gun as claimed in  claim 1 , wherein
 the mounting bracket has
 a front end; and 
 a mounting barrel being formed on the front end of the mounting bracket; and 
   the cover has
 a rear end; and 
 a collar being formed on the rear end of the cover and being mounted around the mounting barrel of the mounting bracket. 
   
   
   
       17 . The electric polishing gun as claimed in  claim 1 , wherein the body is hollow and is composed of two half-casings.