Riveting Tool for High-strength Ring Groove Rivet

Abstract

A high-strength ring groove rivet includes a gun head assembly, a driving mechanism, a transmission mechanism, a power source and a control module arranged in a riveting tool shell. The transmission mechanism has a planetary roller lead screw shaft in coaxial driving connection with the clamping jaw of the gun head assembly, and is also in driving connection with the driving shaft of the driving mechanism through gears installed on the planetary roller lead screw shaft and the driving shaft of the driving mechanism respectively. The planetary roller lead screw is adopted as a component for converting rotary motion into linear motion, the output tension can reach 70 kN, and riveting installation of ring groove rivets with the diameter specification of 12 mm can be effectively completed.

1 . A riveting tool for a high-strength ring groove rivet, comprising a gun head assembly, a driving mechanism, a transmission mechanism, a power source and a control module which are arranged in a riveting tool shell,
 wherein the gun head assembly comprises a clamping jaw and an anvil for squeezed riveting of a ring groove rivet;   the power source is a detachable and rechargeable battery;   the driving mechanism comprises a DC motor, a reduction gearbox driven by the DC motor, and a driving shaft;   the transmission mechanism is a planetary roller lead screw transmission mechanism, a planetary roller lead screw shaft of the planetary roller lead screw transmission mechanism is in coaxial driving connection with the clamping jaw of the gun head assembly, and the planetary roller lead screw shaft is in driving connection with the driving shaft of the driving mechanism through gears installed on the planetary roller lead screw shaft and the driving shaft of the driving mechanism respectively.   
     
     
         2 . The riveting tool for a high-strength ring groove rivet according to  claim 1 , wherein the planetary roller lead screw shaft is driven parallel to the driving shaft. 
     
     
         3 . The riveting tool for a high-strength ring groove rivet according to  claim 2 , wherein the transmission mechanism further comprises a planetary roller lead screw nut which is in driving fit with the planetary roller lead screw shaft, and a large gear is sleeved on the periphery of the planetary roller lead screw nut; the diameter of a pinion sleeved on the driving shaft of the driving mechanism is smaller than that of a large gear, and the pinion sleeved on the driving shaft is in driving connection with the large gear sleeved on the planetary roller lead screw nut. 
     
     
         4 . The riveting tool for a high-strength ring groove rivet according to  claim 3 , wherein a planar thrust roller bearing is arranged on a front end face of the planetary roller lead screw nut, a needle roller thrust bearing is arranged on a rear end face, and a set of needle roller bearings is arranged before and behind the periphery respectively. 
     
     
         5 . The riveting tool for a high-strength ring groove rivet according to  claim 3 , wherein a set of needle roller bearings is arranged before and behind the periphery of the driving shaft respectively. 
     
     
         6 . The riveting tool for a high-strength ring groove rivet according to  claim 1 , wherein the control module comprises: an STM32 main controller circuit, a current sampling circuit, a brushless DC motor drive circuit, a Hall stroke protection circuit, an overcurrent protection circuit, a Hall limit circuit, and a blocking protection circuit.