Pre-stress-adjustable piezoelectric vibrator Jacquard guide needle

Abstract

The invention relates to a pre-stress-adjustable piezoelectric vibrator Jacquard guide needle. The pre-stress-adjustable piezoelectric vibrator Jacquard guide needle includes a piezoelectric vibrator,a guide needle head, and pre-tensioning piezoelectric ceramics; the piezoelectric vibrator includes an elastic substrate and piezoelectric ceramics; the elastic substrate includes two side suspensionarms, an intermediate suspension arm, a base connection region and a needle head connection region; the piezoelectric ceramics are stuck to upper and lower surfaces of the two side suspension arms; acurved plate pre-tensioning arm is arranged on the intermediate suspension arm; the curved plate pre-tensioning arm is folded into a V-shaped thin plate structure in the length direction, and includes two rectangular surfaces which form a certain included angle; the pre-tensioning piezoelectric ceramics are stuck to the two rectangular surfaces of the curved plate pre-tensioning arm, apply a direct voltage to generate a pre-stress; and the guide needle head is arranged on a tail end of the needle head connection region of the elastic substrate. The pre-stress-adjustable piezoelectric vibratorJacquard guide needle is widely applied in the field of piezoelectric ceramics warp knitting machines; compared with the conventional pre-stress-adjustable piezoelectric vibrator Jacquard guide needles, the pre-stress-adjustable piezoelectric vibrator Jacquard guide needle is easy to assemble, and is adjustable in pre-stress.

Description

technical field [0001] The invention belongs to the technical field of piezoelectric ceramic warp knitting machines, and in particular relates to a prestressed adjustable piezoelectric vibrator jacquard guide needle. Background technique [0002] The jacquard guide needle is used in the jacquard warp knitting machine and is the key component to realize the jacquard function. The deflection of the guide needle is realized by using the inverse piezoelectric effect. The polarized piezoelectric ceramic chip will produce contraction and extension deformation when applied with voltage, so that the yarn guide needle will deviate to the left or to the right. Among the existing jacquard yarn guide needles, some use ordinary rectangular piezoelectric vibrators, and some use prestressed piezoelectric vibrators. The prestressed piezoelectric vibrator has the advantages of long service life, low required voltage, and large output displacement, which have been verified theoretically and ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the output displacement of the traditional jacquard needle piezoelectric vibrator is small, and the operation of applying prestress to the prestressed jacquard guide needle is complicated, and the processing accuracy is high, a prestress adjustable piezoelectric vibrator is proposed. Jacquard yarn guide needle, the elastic substrate in the yarn guide needle is arranged with a curved plate pretension arm, and the pretension force is generated by applying a DC voltage to the prestressed piezoelectric ceramics on the surface, compared with the previous prestressed Jacquard Yarn guide needle, the present invention is easy to apply prestress, and prestress can be applied on demand, has the advantages of easy assembly, adjustable prestress, large output displacement, long service life, etc.

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