Patent ID: 7246564
Filing Date: 2007-07-24
Classification: D05B

Abstract:
1. A differential feeding mechanism of the front and rear translation gears of a transverse shuttle-type sewing machine, which is used to adjust the fabric feeding speeds of a front and a rear translation gears, comprising: a main shaft, coupled to the power source of said sewing machine; two rocking shafts, parallel to but not coaxial with said main shaft, and driven by said main shaft to swing up and down, wherein corresponding to said front translation gear, one of said two rocking shafts acts as a front rocking shaft, and corresponding to said rear translation gear, the other one of said two rocking shafts acts as a rear rocking shaft; a swing unit, separately pivotedly coupled to said front rocking shaft and said rear rocking shaft, and further comprising a front swing arm and a rear swing arm, which separately control the feeding travel ranges of corresponding said front and rear translation gears; and two adjust units, further comprising two counter balance weights pivotedly coupled to said front swing arm and said rear swing arm and two shift elements fixedly coupled to said counter balance weights, and separately used to adjust the ranges of the planar to-and-fro feeding travels of said front and rear translation gears.