Motor gear box with grommets

Abstract

A motor gear box has a direct current motor, a first bevel gear, a second bevel gear, a pinion transfer gear, at least one cluster gear, an output gear, an output shaft, and a collar abutting against the output gear and surrounding the output shaft. The motor gear box also includes a frame formed integrally with the collar, a first cover to protect the motor, and a second cover having a cradle formed integrally therein. The output shaft has at one end a stepped down shaft portion held in the cradle and at an opposite end a hollow internal chamber formed to receive a protuberance of a device requiring the delivery of high torque to carry out a task in a small space. A programmable control board is attached to one side of the motor; an electrode tip is arranged on a top of the motor; a lead harness assembly is secured around the electrode tip; and an L-shaped connection rod links the lead harness assembly to the control board to conserve space. A housing contains the direct current motor and has plural mounting tabs. A grommet is secured in each of the plural mounting tabs. The purpose of the grommets is to minimize noise and vibrations caused by high speed rotation of the direct current motor inside the housing.

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       8 . A compact miniature motor, comprising: 
 a DC motor having an output shaft;    a worm driven by the output shaft of the DC motor;    a pinion transfer gear engaging at one end with the worm;    a cluster gear engaging at the other end of the pinion transfer gear; and    an output gear engaging the cluster gear, said output gear having an output shaft;    whereby the worm, the pinion transfer gear, the cluster gear and the output gear form a gear train that wraps around the DC motor generally in the shape of a capital letter J.    
   
   
       9 . The compact miniature motor of  claim 8 , wherein the worm includes a helical gear.  
   
   
       10 . The compact miniature motor of  claim 9 , wherein the helical gear may be back-driven by the pinion transfer gear.  
   
   
       11 . The compact miniature motor of  claim 10 , wherein the helical gear includes a helical angle between about thirty degrees (30°) and about sixty degrees (60°).  
   
   
       12 . The compact miniature motor of  claim 8 , wherein the worm cannot be back driven by the pinion transfer gear.  
   
   
       13 . The compact miniature motor of  claim 8 , wherein the worm includes a single thread.  
   
   
       14 . The compact miniature motor of  claim 8 , wherein the worm includes a double thread.  
   
   
       15 . The compact miniature motor of  claim 8 , wherein the worm includes quadruple threads.  
   
   
       16 . The compact miniature motor of  claim 8 , wherein the worm has threads that completely encircle the shaft.  
   
   
       17 . The compact miniature motor of  claim 8 , wherein the worm has threads that do not completely encircle the shaft.  
   
   
       18 . The compact miniature motor of  claim 8 , wherein the pinion transfer gear engages the worm gear such that the axes of rotation of the gears are positioned at approximately a 90° angle relative to one another.  
   
   
       19 . The compact miniature motor of  claim 18 , wherein the pinion transfer gear engages the cluster gear such that the axes of rotation of the gears are generally parallel to one another.  
   
   
       20 . The compact gear motor of  claim 19 , including at least a second cluster gear positioned between the cluster gear and the output gear.  
   
   
       21 . The compact gear motor of  claim 8 , including at least a second cluster gear positioned between the cluster gear and the output gear.  
   
   
       22 . The compact gear motor of  claim 21 , wherein the cluster gear, the second cluster gear and the output gear step progressively further away from the DC motor.