Needle bed swing mechanism for multi-bar Raschel warp knitting machine

Abstract

The invention discloses a needle bed swing mechanism for a multi-bar Raschel warp knitting machine, which comprises a transmission spindle, an eccentric wheel fixedly mounted on the transmission spindle, an oil tank output bar, an upper swing arm, a looping swing arm shaft, a guide arm and a connecting rod support. One end of the upper swing arm is fixedly connected with the looping swing arm shaft, the other end of the upper swing arm is rotatably connected with the upper end of the oil tank output bar, the upper end of the guide arm is slidably connected with a grooved needle bed, the lower end of the guide arm is fixedly connected with the looping swing arm shaft, a stylet bed is slidably connected with the grooved needle bed, an eccentric bushing connecting rod and a triangular connecting rod are arranged between the eccentric wheel and the oil tank output bar, the lower end of the eccentric bushing connecting rod is sleeved on the eccentric wheel, the upper end of the eccentric bushing connecting rod is rotatably connected with the bottom end of the triangular connecting rod, the left upper end of the triangular connecting rod is rotatably connected with the connecting rod support, and the right upper end of the triangular connecting rod is rotatably connected with the lower end of the oil tank output bar. The coefficient of swing travel speed ratio of the needle bed swing mechanism is approximate to 1:1, the needle bed swing mechanism is well applicable to high-speed warp knitting and is simple in structure and reliable in operation, and a transmission circuit of the needle bed swing mechanism is short.

Description

technical field [0001] The invention relates to a knitting motion mechanism of a warp knitting machine, in particular to a needle bed swing mechanism in the knitting motion mechanism of a multi-bar Raschel warp knitting machine. Background technique [0002] The needle bed of the multi-bar Raschel warp knitting machine includes a grooved needle bed with grooved needles and a needle core bed with needle cores. The movement of the needle bed is composed of the up and down movement of the needle bed and the swinging motion of the needle bed. In the warp knitting machine, the up and down motion of the needle bed and the swinging motion of the needle bed are respectively completed by the corresponding needle bed up and down movement mechanism and the needle bed swing mechanism. In the knitting motion mechanism, the needle bed swing mechanism is particularly important because it has a great influence on the knitting performance of the warp knitting machine. [0003] The needle be...

AI Technical Summary

Problems solved by technology

The needle bed swing mechanism of this structure has the following defects in its work, that is, because it uses a Stephenson-type planar six-bar linkage mechanism to realize the swing motion of the groove needle bed and the needle core bed, so on the one hand, the swing stroke of the swing mechanism The speed ratio coefficient is relatively large, about 1:1.5, which is not conducive to high-speed weaving. On the other hand, the speed ratio coefficient of the swing stroke of this swing mechanism is not only related to the kinematic characteristics of the first-stage crank-rocker mechanism, but also related to the first-stage crank-rocker mechanism. It is related to the connecting rod curve formed by the stage connecting rod, so the design of the mechanism is very difficult, resulting in a large error between the stroke speed ratio coefficient in the theoretical design and the stroke speed ratio coefficient in actual work, resulting in a large number of scrapped parts

[0004] Chinese invention patent ZL201010154168.X also discloses a warp knitting needle bed swing mechanism, which uses a plane eight-link mechanism to realize the swing motion of the groove needle bed and the needle core bed. The swing mechanism of this structure not only swings The stroke speed ratio coefficient is large, close to 1:2, which is not conducive to high-speed weaving, and the structure is complex, the transmission line is long, and the reliability is poor

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