PNEUMATIC DRIVE FOR SEWING MACHINE Russian patent published in 2002 - IPC

FIELD: mechanical engineering. SUBSTANCE: pneumatic drive for individual sewing machine mechanisms with linear or oscillatory motion of end working link has pneumatic cylinder, whose rod is connected to end working link of mechanism coupled through pipes with control slide valve of air distributor fixed on distributing shaft of controller. Distributing shaft is single for all sewing machine mechanisms. Pneumatic drive has control system for controlled supplying of pressurized air to air distributor. Movable link of pneumatic cylinder is kinematically connected to distributing shaft of controller. Cylindrical slide valve-type air distributor is located on distributing shaft of controller and has throttle slot of variable width. Slot overlaps outlet zone of side discharge throttle opening and width of round channel for air distributor in controller. Pneumatic cylinder rod is urged for displacement by distributing shaft according to sinusoidal law. EFFECT: increased efficiency and simplified construction. 2 dwg