| 摘要 |
<p>The present invention provides a differential feeding device of a sewing machine including a lower feeder, a couple device, a differential adjustment device, and an upper feeder. The lower feeder is collectively formed as a lower feeding shaft comprises a first feeding shaft and a second feeding shaft located on the same axis of the first feeding shaft. The first feeding shaft is joined with a first clutch assembly and penetrates the first clutch assembly. The second feeding shaft is joined with a second clutch assembly and penetrates the second clutch assembly. Additionally, the couple shaft includes a couple shaft in parallel with the lower feeding shaft. The couple shaft is joined with the first clutch assembly and the second clutch assembly. The differential adjustment device is assembled between the couple shaft and the first clutch assembly. The upper feeder includes an upper feeding shaft. The upper feeding shaft is joined with the first feeding shaft by a transmission assembly to make the upper feeder and the lower feeder operate at the same time. The differential adjustment device selectively increases or decreases a rotation angle of the first feeding shaft operated by the first clutch assembly in order to generate positive or negative differential feeding corresponding to the second feeding shaft.</p> |
