Rolling wheel regulator of sewing machine
An adjusting device, sewing machine technology, applied to sewing machine components, needle holders for sewing machines, sewing equipment, etc., can solve the problems of inconsistent assembly weight of parts, unbalanced movement of stepper motors, affecting sewing quality, etc., to avoid stitch errors, structure Simple, high-quality sewing results
Inactive Publication Date: 2012-05-02
ZHEJIANG GEMSY MECHANICAL & ELECTRICAL
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Problems solved by technology
In this way, it is easy to cause the motion imbalance of the stepping motor due to the inertia of the connecting parts between the stepping motor and the needle bar; there is also the inconsistent assembly weight of the parts, and the rotation and swing of the parts will also cause the motion imbalance of the stepping motor, which cannot be well controlled. The needle bar goes down to a certain position accurately, which will cause stitch errors and affect the sewing quality
Method used
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[0027] Reference figure 1 with Picture 9 , The upper shaft bearing 24 of the sewing machine is fixed at the head of the machine frame 1, the upper shaft 11 is sleeved into the upper shaft bearing 24 and rotates around the direction A, the needle bar crank 16 is fixed on the left end of the upper shaft 11 and follows the upper shaft 11 The axis rotates, the thread take-up crank 12 is fixed on the needle bar crank 16, the distance between the axis of the thread take-up crank 12 and the upper shaft 11 is R, and the needle bar crank 16 drives the thread take-up crank 12 to form a circular motion track K. The thread take-up crank 12 drives the needle bar 15 to reciprocate up and down through the crank connecting rod 13 and the needle bar connection column 14, and the bottom of the needle bar is equipped with an organic needle 25, so that the needle 25 completes the up and down reciprocating movement along with the needle bar 15. Generally, the upper shaft 11 is driven by a servo mot...
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The invention relates to a sewing machine idler wheel adjusting device. The technical proposal is that the device comprises a stander and a needle bar swing span axis; wherein, a stepper motor controls the side-side movement of the needle bar swing span axis; the stander is provided with a idler wheel component which can adjust the loading force; the idler wheel component is collided with the cylindrical surface of the needle bar swing span axis. The stander and a needle bar swing span sleeve are radially provided with a through hole which is connected with an axle hole; the idler wheel component is arranged at the through hole by a mounting deck; the top of the idler wheel component is provided with a regulating retaining mechanism. By the loading force of the idler wheel adjusting device, the grip resistance of the needle bar swing span axis is changed so that the loading force of the reciprocating motion of the needle bar swing span which is driven by the stepper motor can be controlled in a certain range; the needle bar swing span axis and the needle bar swing span axis are relatively stable so that an upper spindle and the needle bar swing span axis keeps synchronous; the stitch error is avoided; the sewing quality is improved. The idler wheel adjusting device has the advantages of simple structure, convenient operation and good reliability.
Description
Technical field [0001] The invention relates to sewing machine accessories, in particular to a sewing machine roller adjusting device installed on a needle bar swing frame shaft. Background technique [0002] The original sewing machine usually uses a mechanical transmission mechanism to drive the needle bar swing frame to move left and right. The sewing pattern is controlled by a cam, and the needle bar swing frame does not need to be adjusted; but because the swing is a mechanical motion, the noise and vibration are relatively large. Also relatively single. [0003] In order to overcome the above-mentioned shortcomings, the upper shaft of the sewing machine is driven by a servo motor, the needle bar crank rotates around the upper shaft axis, the thread take-up crank is fixed on the needle bar crank, and the needle bar crank drives to form a motion track, which is driven by the crank connecting rod and the needle. The connection of the rod connecting column drives the needle rod ...
Claims
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IPC IPC(8): D05B55/14
Inventor 阮玲斐李恩根
Owner ZHEJIANG GEMSY MECHANICAL & ELECTRICAL