| 摘要 |
The invention provides a sewing machine, wherein small lightweight and action accelation surrounding a boiler are achieved. The sewing machine includes the components as following: a needle bar, a boiler, a sewing machine motor, a boiler driven motor, a needle bar rotating mechanism, a boiler rotating platform; a needle rotating motor, which enbles the needle bar to rotate; a boiler rotating motor, which enables the boiler rotating platform to rotate, and a differential transmission mechanism, which is provided with an input shaft and an output shaft for transmitting a boiler rotating force. The differential transmission mechanism comprises the components as following: a support frame, which is arranged surrounding the input shaft and the output shaft on a center line to rotate; a transmitter, which is supported on the support frame, wherein the rotating force is transmitted between the input shaft and the output shaft; a driven part, which is arranged on a boiler rotating platform or the support frame and is rotated through the boiler rotating motor; and a rotation linkage mechanism, wherein the boiler rotating platform and the support frame are driven to rotate at the same direction by the rotating force from the driven part, and the boiler rotating platform is rotated with the rotation amount twice as much as the rotation amount of the support frame. |
