Rotary shuttle is an important part of the sewing machine, in the sewing machine, the sewing machine is the most popular with the lock stitch suture. The sewing machine most is the rotating shuttle, the shuttle tip hook line of the ring, while expanding loops, and guide line round the bobbin and a lock stitch.
The working principle of the rotating shuttle usually in the machine needle to rise a certain distance, rotating shuttle bed shuttle tip to hook into the loop line, shuttle tip hook line ring to rotate, when the circle line was sent to the rotating shuttle frame rails, wire ring is the shuttle frame junction hook hook, then the limit position of the machine needle should be rise of about 2 mm. The rotating shuttle frame on the line
Hook shall ring online will soon close to the line end ring part is left with a time to move to the back of the guide rail and junction hook machine needle with the movement axis angle is about 50 degrees, by the shuttle bed shuttle tip outer convex above 45 degrees hook line ring, continues to rotate, wire ring at the end of the hook on the junction hook, in order to enable line ring slides smoothly to
Spindle frame surface and the hypotenuse of the tail of the wiring board to wire loop of thread to externally oriented poke, and posterior part of the ring line side shuttle frame junction hook hook, slide to the bottom of the shuttle frame, in this moment, needle machine rotary shuttle mechanism in exit.
As the shuttle frame line, very smooth, wire ring smoothly from the shuttle frame at the bottom of the slide, can make the hook point rotates 180 DEG, take-up lever to ascend, and the thread take-up lever of sent down the remaining portion of the line close up, a shuttle tip hook line ring continues to rotate, line of part under the conductor plate, through the outer convex 45 degree inclined
, moving wire to plate edge, and gradually higher shuttle frame, the ring of the front half of the line poke out. In the second half of the line ring by the shuttle frame junction hook hook, and the line ring and separate, the last line of the ring of the front and back cover of the shuttle frame, the bottom line is set in the middle, the thread take-up lever tensioning wire ring, forming the stitches.
The operating period of the rotary shuttle mechanism, 203 ~ 312 degrees is the phase between the hook line and the expansion of the linear ring, 312 ~ 320 degrees is the needle from the core set of 0 degrees to 180 degrees is an empty stroke. On the axis of a rotation, the rotation of the shuttle two, and in the second turn of the role.
Rotary hook and forming principle of stitch and oscillating shuttle is basically the same, but its forming method and the process of trace and oscillating shuttle and different: the hook is constant angular velocity rotation, and oscillating shuttle is not isokinetic swing back and forth movement; for a reciprocating motion in the spindle rotation) in the machine needle and hook constant angular velocity rotation
Two weeks, and oscillating shuttle back and forth swing; rotary spindle is rotating shuttle frame fixed and rotating shuttle bed is the rotation, it is by the bed of the shuttle tip to hook line ring, by the rotating shuttle frame hook to junction, the bypass a shuttle core sleeve shuttle frame at the bottom, top, and, from the surface of the rotating shuttle board chief off-line line ring formation.