Torsion shaft structure based multi-link all-electric servo synchronous bending machine

Patent metadata

Field	Value
Publication number	US-11338343-B2
Application number	US-201916759101-A
Country	US
Kind code	B2
Filing date	Sep 10, 2019
Priority date	Jul 22, 2019
Publication date	May 24, 2022
Grant date	May 24, 2022

Abstract

A torsion shaft structure based multi-link all-electric servo synchronous bending machine, comprising a machine frame, a lower die fixedly connected to the machine frame and used for bending, a slider capable of moving up and down along the machine frame, and an upper die fixedly connected to the slider and cooperating with the lower die to perform bending, wherein the slider is left-right symmetrically connected to drive mechanisms for driving the slider to realize a transmission ratio adjustable motion.

First claim

What is claimed is:

1. A torsion shaft structure comprising a machine frame ( 1 ), a lower die ( 2 ) fixedly connected to the machine frame and used for bending, a slider ( 3 ) capable of moving up and down along the machine frame, and an upper die ( 4 ) fixedly connected to the slider and cooperating with the lower die to perform bending, wherein the slider ( 3 ) is connected to two separate and distinct drive mechanisms which are driving the slider to realize a nonlinear motion characteristic; wherein a drive mechanism comprise a power assembly located on the machine frame, a screw ( 5 ) driven by the power assembly, a nut ( 6 ) in thread fit with the screw, a rotatable torsion shaft ( 7 ) disposed perpendicular to a plate surface of the slider and hingedly connected to the machine frame, a first crank ( 8 ) having one end hingedly connected to the nut and the other end fixedly connected to the torsion shaft, and a second crank ( 10 ) having one end fixedly connected to the torsion shaft and the other end hingedly connected to the slider via a first link ( 9 ), wherein the power assembly is configured to output to drive the screw ( 5 ) to rotate, drives the nut ( 6 ) to move via a screw thread pair transmission, and drives the slider ( 3 ) to move up and down sequentially via the first crank ( 8 ), the torsion shaft ( 7 ), the second crank ( 10 ) and the first link ( 9 ).

2. The torsion shaft structure according to claim 1 , wherein the power assembly comprises a servo motor ( 15 ) located on the machine frame, a small belt wheel ( 16 ) located on an output shaft of the servo motor, a big belt wheel ( 17 ) coaxially fixedly connected to the screw, and a synchronous belt ( 18 ) winding on the small belt wheel and big belt wheel to perform transmission; wherein the small belt wheel has a smaller diameter than the big belt wheel.

3. The torsion shaft structure according to claim 1 , wherein the machine frame ( 1 ) is hingedly connected to a fixing base ( 19 ) for configuring the power assembly; and the screw ( 5 ) is hingedly connected to the fixing base ( 19 ) via a bearing.

4. The torsion shaft structure according to claim 1 , wherein the nut ( 6 ) is hingedly connected to the first crank ( 8 ) via a connecting base ( 20 ).

5. The torsion shaft structure according to claim 1 , wherein the hinge position of the torsion shaft & the machine frame and the hinge point of the second crank & the machine frame are symmetric at the center of side plate of the machine frame.

Assignees

• Univ Nanjing Posts & Telecommunications

Inventors

• Xu Fengyu
• Lu Yuxuan
• Yang Sen
• Jiang Guoping
• Xiao Min

Classifications

• B21D37/12

  Particular guiding equipment, {e.g. pliers}; Special arrangements for interconnection or cooperation of dies · CPC title

• B21C51/00

  Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F · CPC title

• B21D5/0209 Primary

  Tools therefor · CPC title

• B30B1/103

  operated by screw means · CPC title

• B21D5/004

  with program control · CPC title