Spring manufacturing device

Abstract

A spring manufacturing device includes an input shaft having a passage defined therethrough for a wire extending and a first gear is fixedly mounted to the input shaft and driven by a first servo motor. A second gear is freely mounted to the input shaft and driven by a second servo motor. A box having two pairs of rollers is connected between the input shaft and an output shaft and the wire is rolled forward by the rollers. A first auxiliary gear is co-axially is co-rotatably connected to the second gear and drives the rollers on the box. The auxiliary gear is driven by a third servo motor. The input shaft and the output shaft are rotated independently from the box.

What is claimed is:  
     
         1 . A spring manufacturing device comprising: 
 an input shaft having a passage defined therethrough and a first gear fixedly mounted to said input shaft, said first gear driven by a first servo motor, a second gear freely mounted to said input shaft and driven by a second servo motor, a first auxiliary gear co-axially and co-rotatably connected to said second gear;    a box having an end thereof connected to an end of said input shaft and having two first rollers and two second rollers, the other end of said box connected to an output shaft and a third gear co-axially connected to said output shaft;    a fourth gear engaged with said auxiliary gear and a driving shaft extending from said fourth gear and inserted into said box, said driving shaft driving said two first rollers and said two second rollers, and    a third servo motor driving said third gear.    
     
     
         2 . The device claimed in  claim 1 , wherein said driving shaft is connected to a driving gear and a mediate shaft is located in said box with a main gear mounted to said mediate shaft, a co-operated gear connected to said main gear and engaged with said driving gear, each of said first rollers and said two second rollers mounted to a rod, each rod having an operation gear which are engaged with said main gear.  
     
     
         3 . The device as claimed in  claim 2 , wherein said main gear and said co-operated gear are bevel gears.  
     
     
         4 . The device as claimed in  claim 1 , wherein said first servo motor has a first motor gear and a belt is connected between said first motor gear and said first gear.  
     
     
         5 . The device as claimed in  claim 1 , wherein said second servo motor has a second motor gear and a belt is connected between said second motor gear and said second gear.