Abrégé

A direct drive cloth feeding mechanism of a sewing machine includes a cloth feeding structure, a vertical driving structure and a direction adjustment structure. The cloth feeding structure includes a swing shaft and a cloth feeding teeth member. The vertical driving structure includes an eccentric shaft connected to the cloth feeding teeth member, and an eccentric cam disposed on the eccentric shaft. The direction adjustment structure includes a stepping motor, and a rotating shaft driven by the stepping motor to rotate and switch between a first position and a second position. When the stepping motor directly drives the rotating shaft to the first position, the cloth feeding teeth member performs a forward feeding process. When the stepping motor directly drives the rotating shaft to the second position, the cloth feeding teeth member performs a reverse feeding process.

Classes IPC  ?

• D05B 27/02 - Moyens d'entraînement de l'ouvrage pour machines à coudre avec griffes d'entraînement à mouvements horizontaux et verticaux
• D05B 27/22 - Moyens d'entraînement de l'ouvrage pour machines à coudre avec moyens pour régler la longueur du point

Abrégé

A thread cutting mechanism is mounted on a sewing machine which includes a sewing platform. The thread cutting mechanism includes a driver assembly and a thread cutting assembly. The driver assembly includes a stepping motor, a swing lever pivotally connected to the stepping motor, and a pushing rod connected to the stepping motor and swing lever and driven jointly with the swing lever by the stepping motor to perform a back-and-forth process. The thread cutting mechanism is disposed on the sewing platform, and includes a thread hooking blade connected to and driven by the swing lever to move back-and-forth along a thread hooking path and to hook back a sewing thread, and a thread cutting blade disposed on the thread hooking path and for cutting the sewing thread when the thread hooking blade hooks back the sewing thread.

Classes IPC  ?

• D05B 65/00 - Dispositifs pour sectionner le fil de l'aiguille ou le fil du dessous dans les machines à coudre
• D05B 65/02 - Dispositifs pour sectionner le fil de l'aiguille ou le fil du dessous dans les machines à coudre commandés par les mécanismes de piquage
• D05B 59/00 - Adaptations de dispositifs de bobinage de la canette ou de changement de canette des machines à coudreDispositifs indicateurs ou de commande associés à ces dispositifs

Abrégé

A differential feeding mechanism of the front and rear translation gears of a transverse shuttle-type sewing machine can adjust the fabric feeding speeds of the front and rear translation gears. A main shaft coupled to the power source of the sewing machine is used to drive a front and a rear rocking shafts parallel to but not coaxial with the main shaft to swing up and down, which further drives the front and rear translation gears to feed fabric in. The front and rear rocking shafts are separately pivotedly coupled to front and rear swing arms to form a swing unit. Counter balance weights are pivotedly installed to the swing unit. Shift elements are pivotedly installed to the counter balance weights, which can control the ranges of the planar to-and fro travels of the front and rear translation gears and creates different effects of the sewing thread.

Classes IPC  ?

• D05B 27/08 - Moyens d'entraînement de l'ouvrage pour machines à coudre avec griffes d'entraînement à mouvements horizontaux et verticaux avec mouvements d'entraînement différentiels
• D05B 35/00 - Éléments d'alimentation ou de manutention de l'ouvrage pour machines à coudre non prévus ailleurs