Feeding device of industrial sewing machine

A feeding device of an industrial sewing machine, the feeding device comprising:

• a shell base;
• a main connecting rack pivotally connected to the shell base, and having
• a rotating axis;
• a first bar portion;
• a second bar portion, wherein the first bar portion and the second bar portion both extend along a radial direction of the rotating axis of the main connecting rack;
• a terminal driven rack, one end of the terminal driven rack pivotally connected to an outer end of the first bar portion, and another end of the terminal driven rack pivotally connected to an outer end of the second bar portion;
• the terminal driven rack having
• a feed dogs plate;
• a feeding-driven mechanism connected to the first bar portion of the main connecting rack and the shell base, and having
• a first driven rack having
• a first connecting end pivotally connected to the first bar portion of the main connecting rack;
• and
• a first recess end connected to the shell base, and having
• a first sliding recess;
• a raising-driven mechanism connected to the second bar portion of the main connecting rack and the terminal driven rack, and having
• a second driven rack having
• a second connecting end pivotally connected to the second bar portion of the main connecting rack;
• and
• a second recess end having
• a second sliding recess;
• a raising-connecting rod, one end of the raising-connecting rod pivotally connected to the second recess end of the second driven rack, and another end of the raising-connecting rod pivotally connected to the terminal driven rack;
• and
• a driving shaft rotatably mounted at the shell base, and having
• a first crank mounted through and abutting against the first sliding recess of the first driven rack of the feeding-driven mechanism;
• and
• a second crank mounted through and abutting against the second sliding recess of the second driven rack of the raising-driven mechanism.