CN112011888B

CN112011888B - Knitting needle driving device

Info

Publication number: CN112011888B
Application number: CN202010811910.3A
Authority: CN
Inventors: 周宁
Original assignee: Zhejiang Rifa Textile Machinery Co Ltd
Current assignee: Zhejiang Rifa Textile Machinery Co Ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-07-02
Anticipated expiration: 2040-08-13
Also published as: CN112011888A

Abstract

The invention discloses a driving device of a knitting needle, which comprises a driver, a knitting needle and a needle cylinder, wherein the knitting needle is inserted into a needle groove of the needle cylinder, and the driver is uniformly distributed along the circumferential direction of the needle cylinder; the driver comprises a driving seat and a driving sheet, and the driving sheet is fixedly arranged on the driving seat; the driving sheet comprises a driving sheet base body, a circuit sheet and a piezoelectric sheet, wherein the circuit sheet and the piezoelectric sheet are arranged on the driving sheet base body, one side, close to the needle cylinder, of the driving sheet base body is provided with a motion foot, and the motion foot is in contact with the knitting needle. The invention can change the mechanical deformation of the piezoelectric sheet by changing the voltage and frequency of the piezoelectric sheet, thereby changing the motion trail of the knitting needle.

Description

Knitting needle driving device

Technical Field

The invention relates to the technical field of a driving device of a knitting needle in a knitting machine, in particular to a driving device of a knitting needle.

Background

The common driving method of the knitting needle in the knitting machine is to convert the rotary motion of the motor into the rotary motion of the needle cylinder through the traditional gear or belt, the knitting needle is inserted into the needle groove of the needle cylinder to make the rotary motion, and the knitting needle slides up and down in the needle groove along the motion track groove of the cam by the cam arranged at the specific position.

The driving mode of the knitting needle is a driving mode commonly adopted by all knitting machines at present, the driving principle is simple and reliable, but the motion track grooves on the triangles are made by machining, the cams cannot be changed, if fabrics of other varieties need to be produced, the triangles with other motion tracks need to be changed, the varieties of the triangles are various, and when the motion tracks of the triangles are determined to be suitable, a large number of the triangles need to be processed for testing, so that the testing cost is increased, and meanwhile, the testing period is also increased.

Disclosure of Invention

The present invention is directed to a knitting needle driving device, which solves the problems of the prior art as set forth in the background above.

The technical problem of the invention is mainly solved by the following technical scheme: a driving device of a knitting needle comprises a driver, a knitting needle and a needle cylinder, wherein the knitting needle is inserted into a needle groove of the needle cylinder, and the driver is uniformly distributed along the circumferential direction of the needle cylinder; the driver comprises a driving seat and a driving sheet, and the driving sheet is fixedly arranged on the driving seat; the driving sheet comprises a driving sheet base body, a circuit sheet and a piezoelectric sheet, wherein the circuit sheet and the piezoelectric sheet are arranged on the driving sheet base body; when a voltage with a certain frequency is applied to the piezoelectric sheet, the mechanical deformation generated by the piezoelectric sheet can drive the knitting needle to move up and down.

Further, the number of the motion feet is two, and the motion feet are distributed at intervals along the edge of the driving sheet base body.

Furthermore, the number of the piezoelectric patches is three, the piezoelectric patches comprise two vertical piezoelectric patches and one transverse piezoelectric patch, the vertical piezoelectric patches correspond to the positions of the motion feet respectively, and the transverse piezoelectric patches are arranged at the relative middle positions of the driving patch matrix; and the circuit on the circuit sheet, the vertical piezoelectric sheet and the transverse piezoelectric sheet respectively form a loop.

Further, the circuit sheet is pasted on the driving sheet base body, and the piezoelectric sheet is pasted on the circuit sheet.

Further, the surface of the knitting needle, which is in contact with the motion foot, is coated with a wear-resistant coating.

Furthermore, a driving sheet slot is formed in the driving seat, and the driving sheet is fixedly arranged in the driving sheet slot.

Compared with the prior art, the invention has the advantages that: the invention can change the voltage and frequency of the piezoelectric sheet by changing the program, thereby changing the mechanical deformation of the piezoelectric sheet and further changing the motion trail of the knitting needle, and can replace a plurality of triangles in the traditional knitting machine.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic cross-sectional structure of the present invention.

Fig. 3 is a schematic view of the structure of the actuator and the knitting needle of the present invention.

FIG. 4 is a schematic diagram of the driving plate of the present invention.

Fig. 5 is a schematic cross-sectional view of a-a in fig. 4.

Fig. 6 is a schematic diagram of the motion trail of the motion foot in the invention.

Fig. 7 is a schematic view of the structure of the knitting needle of the invention.

Fig. 8 is a layout diagram of the driver in the present invention.

In the figure: 1. the device comprises a driver 11, a driving seat 111, a driving sheet slot 12, a driving sheet 121, a driving sheet base 122, a circuit sheet 123, a motion foot 124, a vertical piezoelectric sheet 125 and a transverse piezoelectric sheet; 2. a needle cylinder; 3. needles 31, wear resistant coating.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further specifically described below by way of embodiments in combination with the accompanying drawings.

Example (b): a knitting needle driving device is shown in figures 1-8 and comprises a driver 1, knitting needles 3 and a needle cylinder 2, wherein the knitting needles 3 are inserted into needle grooves of the needle cylinder 2, and the drivers 1 are uniformly distributed along the circumferential direction of the needle cylinder 2.

The driver 1 comprises a driving seat 11 and a driving plate 12, wherein the driving seat 11 is provided with a driving plate slot 111, and the driving plate 12 is fixedly arranged in the driving plate slot 111. The driving sheet 12 consists of a driving sheet base body 121, a circuit sheet 122 and a piezoelectric sheet, wherein two moving feet 123 are arranged on one side of the driving sheet base body 121 close to the needle cylinder 2, and the two moving feet 123 are distributed at intervals along the edge of the driving sheet base body 121 and are in contact with the knitting needle 3.

In this embodiment, depending on the characteristics of the piezoelectric sheet, when a voltage is applied to the piezoelectric sheet, mechanical deformation occurs according to the change in the voltage and the frequency.

In the above structure, the circuit sheet 122 is adhered to the surface of the driving sheet substrate 121 by high-strength glue, three piezoelectric sheets are respectively two vertical piezoelectric sheets 124 and one horizontal piezoelectric sheet 125, and are adhered to the surface of the circuit sheet 122 by high-strength glue, wherein the positions of the two vertical piezoelectric sheets 124 in the vertical direction respectively correspond to the positions of the motion feet 123, and the horizontal piezoelectric sheet 125 is located at the position of the driving sheet substrate 121 relatively in the middle. The circuit on the circuit sheet 122 and the two ends of the vertical piezoelectric sheet 124 and the horizontal piezoelectric sheet 125 respectively form a loop, so that when a voltage with a certain frequency is applied to the vertical piezoelectric sheet 124 or the horizontal piezoelectric sheet 125, the vertical piezoelectric sheet 124 or the horizontal piezoelectric sheet 125 can generate a mechanical deformation with a certain frequency, specifically, the vertical piezoelectric sheet 124 generates a mechanical deformation with a horizontal direction, the horizontal piezoelectric sheet 125 generates a mechanical deformation with a vertical direction, the deformations of the two piezoelectric sheets can enable the driving sheet to generate deformations in the same direction, and when the voltage with a certain frequency is applied to the piezoelectric sheet, the piezoelectric sheet and the driving sheet can resonate to form a resonant waveform and form an elliptical motion at the motion foot.

Specifically, when a voltage with a certain frequency is applied to the vertical piezoelectric patch 124 and the horizontal piezoelectric patch 125 at the same time, and the phase difference (0-pi/2: clockwise; pi/2-pi: counterclockwise) between the input voltages of the vertical piezoelectric patch 124 and the horizontal piezoelectric patch 125 is controlled, the mechanical deformation generated by the piezoelectric patches can drive the motion foot 123 to make an elliptical motion along the plane where the driving patch 12 is located, and when the elliptical motion trajectory is counterclockwise, the needle is driven to move upwards, and vice versa, so that the needle 3 can be driven to make an up-and-down motion. By changing the phase difference between the voltages applied to the vertical piezoelectric patches 124 and the horizontal piezoelectric patches 125, the direction of rotation of the elliptical motion of the driving foot 123 can be changed.

In the embodiment, the knitting needle 3 has light weight, the friction force generated by the motion foot 123 and the knitting needle 3 is enough to drive the knitting needle 3 to move up and down, and in order to further ensure the normal operation of the knitting needle 3, the surface of the knitting needle 3 in contact with the motion foot 123 is coated with the wear-resistant coating 31 for increasing the friction between the motion foot 123 and the knitting needle 3 and further increasing the friction force generated by the motion foot 123 to the knitting needle 3.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification and modification of the above embodiments in accordance with the technical spirit of the present invention should be considered as falling within the scope of the present invention.

Claims

1. The knitting needle driving device is characterized by comprising a driver, knitting needles and a needle cylinder, wherein the knitting needles are inserted into needle grooves of the needle cylinder, and the drivers are uniformly distributed along the circumferential direction of the needle cylinder;

the driver comprises a driving seat and a driving sheet, and the driving sheet is fixedly arranged on the driving seat; the driving sheet comprises a driving sheet base body, a circuit sheet and a piezoelectric sheet, wherein the circuit sheet and the piezoelectric sheet are arranged on the driving sheet base body;

when a voltage with a certain frequency is applied to the piezoelectric sheet, the mechanical deformation generated by the piezoelectric sheet can drive the knitting needle to move up and down.

2. A needle actuation device as claimed in claim 1, characterized in that said two motion feet are spaced along the edge of said actuation plate base.

3. The knitting needle driving device according to claim 2, wherein the number of the piezoelectric pieces is three, and the piezoelectric pieces comprise two vertical piezoelectric pieces and one transverse piezoelectric piece, the vertical piezoelectric pieces correspond to the positions of the motion feet respectively, and the transverse piezoelectric pieces are arranged at opposite middle positions of the driving piece base body; and the circuit on the circuit sheet, the vertical piezoelectric sheet and the transverse piezoelectric sheet respectively form a loop.

4. A needle actuation device as claimed in any one of claims 1 to 3, wherein said circuit sheet is adhered to said actuator sheet base and said piezoelectric sheet is adhered to said circuit sheet.

5. A needle actuation device according to any one of claims 1 to 3, characterized in that the surface of the needle in contact with the motion foot is coated with a wear-resistant coating.

6. The knitting needle driving device according to claim 1, wherein the driving seat is provided with a driving piece insertion groove, and the driving piece is fixedly arranged in the driving piece insertion groove.