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    • 85. 发明授权
    • Looptaker driving arrangement and method for zig-zag sewing machines
    • Zig Zag缝纫机的松动驱动装置及方法
    • US5870960A
    • 1999-02-16
    • US940488
    • 1997-09-30
    • Jerry Don Brown
    • Jerry Don Brown
    • D05B57/32D05B69/16
    • D05B57/32
    • A looptaker driving arrangement in a zig-zag sewing machine includes: a rotatable drive shaft driving rotation of the looptaker of the sewing machine; a main drive member rotatably supported on the drive shaft; a secondary drive member fixed on the drive shaft for concurrent rotation therewith; a bushing rotatably mounted on the drive shaft with an eccentric outer periphery; and a coupling member rotatably mounted on the periphery of the bushing in eccentric relation to the drive shaft and engaging the main drive member and the secondary drive member. Rotation of the main drive member about the drive shaft axis combined with rotation of the bushing about the drive shaft axis relative to the main drive member angularly accelerates and decelerates the secondary drive member with respect to the main drive member and, in turn, angularly accelerates and decelerates the drive shaft. A gear arrangement provided for driving rotation of the bushing about the drive shaft axis relative to the main drive member includes: a first gear fixed to the drive shaft; a pair of connected gears rotatably mounted to the sewing machine; and a second gear fixedly connected to the bushing and rotatably supported on the drive shaft in coaxial relation thereto. The first gear meshingly engages a first one of the pair of gears and the second gear meshingly engages a second one of the pair of gears, whereby rotation of the drive shaft rotates the bushing about the drive shaft axis relative to the main drive member.
    • 在之字形缝纫机中的拾取器驱动装置包括:驱动缝纫机的取景器旋转的可旋转驱动轴; 主驱动构件,其可旋转地支撑在所述驱动轴上; 固定在所述驱动轴上以与之同时旋转的次级驱动构件; 可旋转地安装在具有偏心外周的驱动轴上的衬套; 以及耦合构件,其可旋转地安装在所述衬套的周边上,与所述驱动轴偏心并且接合所述主驱动构件和所述次驱动构件。 主驱动构件围绕驱动轴轴线的旋转与衬套围绕驱动轴轴线相对于主驱动构件的旋转相结合地相对于主驱动构件有角度地加速和减速辅助驱动构件,并且进而有角度地加速 并使驱动轴减速。 一种齿轮装置,用于相对于主驱动构件绕驱动轴的轴线驱动套筒的旋转,包括:固定到驱动轴上的第一齿轮; 一对可旋转地安装在缝纫机上的连接齿轮; 以及固定地连接到所述衬套并与所述驱动轴以同轴关系可旋转地支撑的第二齿轮。 所述第一齿轮啮合所述一对齿轮中的第一齿轮,并且所述第二齿轮啮合所述一对齿轮中的第二齿轮,由此所述驱动轴的旋转相对于所述主驱动部件围绕所述驱动轴轴线旋转所述衬套。