阅读说明：本技术 一种喷气织机止纱器 (Yarn stopper of air jet loom ) 是由 林晓焕 位德彬 刘玮航 王泽民 于 2019-10-29 设计创作，主要内容包括：本发明提供了一种喷气织机止纱器,包括止纱销、压电式止纱销驱动装置和驱动电路,止纱销通过气路与压电式止纱销驱动装置连接,压电式止纱销驱动装置通过电线与驱动电路连接。止纱销包括壳体a,壳体a内腔放置有止纱针,壳体a上开设有第一通孔和第二通孔,压电式止纱销驱动装置包括壳体b,壳体b上设有第一气口、第二气口和第三气口,第一气口和第三气口正对设置,第一气口与气源连接,第二气口与第二通孔连接,第三气口为排气口,与壳体b外部相通,壳体b内设有压电弯曲片,压电弯曲片的固定端与壳体b的内壁连接,活动端在逆压电效应下分别与第一气口和第三气口贴合,通过逆压电效应控制止纱销的抬起和落下,从而实现止纱针快速响应。(The invention provides a yarn stopper of an air jet loom, which comprises a yarn stopper pin, a piezoelectric type yarn stopper pin driving device and a driving circuit, wherein the yarn stopper pin is connected with the piezoelectric type yarn stopper pin driving device through an air path, and the piezoelectric type yarn stopper pin driving device is connected with the driving circuit through an electric wire. The yarn stopping pin comprises a shell a, a yarn stopping needle is placed in an inner cavity of the shell a, a first through hole and a second through hole are formed in the shell a, the piezoelectric type yarn stopping pin driving device comprises a shell b, a first air port is formed in the shell b, a second air port and a third air port are formed in the shell a, the first air port and the third air port are right arranged, the first air port is connected with an air source, the second air port is connected with the second through hole, the third air port is an air exhaust port and is communicated with the outside of the shell b, a piezoelectric bending piece is arranged in the shell b, the fixed end of the piezoelectric bending piece is connected with the inner wall of the shell b, the movable end is attached to the first air port and the third air port respectively under the inverse piezoelectric effect, the yarn stopping pin is controlled to lift up and fall down through the inverse.)

1. The yarn stopper of the air jet loom is characterized by comprising a yarn stopper pin, a piezoelectric type yarn stopper pin driving device and a driving circuit (8), wherein the yarn stopper pin is connected with the piezoelectric type yarn stopper pin driving device through an air path, and the piezoelectric type yarn stopper pin driving device is connected with the driving circuit (8) through an electric wire.

2. The yarn stopper of the air jet loom according to claim 1, wherein the yarn stopper pin comprises a shell a (1), a yarn stopper needle (3) is placed in an inner cavity of the shell a (1), the yarn stopper needle (3) comprises a rod body and a plug body which are tightly connected with each other, the rod body penetrates through the shell a (1), the peripheral wall of the plug body is attached to the inner wall of the shell a (1), the plug body divides the inner cavity of the shell a (1) into a first cavity and a second cavity, an elastic element (2) is further connected between one end of the plug body, far away from the rod body, and the shell a (1), the shell a (1) is provided with a first through hole and a second through hole, the first through hole is located on one side of the first cavity, the second through hole is located on one side of the second cavity, and the second through hole is connected with an air flow driving device.

3. An air jet loom stop as claimed in claim 2, characterized in that the piezoelectric stop pin drive comprises a housing b (9), the shell b (9) is provided with a first air port (4), a second air port (5) and a third air port (7), the first air port (4) and the third air port (7) are arranged oppositely, the first air port (4) is connected with an air source, the second air port (5) is connected with the second through hole, the third air port (7) is an exhaust port, is communicated with the outside of the shell b (9), a piezoelectric bending sheet (6) is arranged in the shell b (9), the fixed end of the piezoelectric bending sheet (6) is connected with the inner wall of the shell b (9), the movable end is respectively attached to the first air port (4) and the third air port (7) under the inverse piezoelectric effect, the piezoelectric bending sheet (6) is connected with a driving circuit (8) through an electric wire.

4. An air jet loom yarn stopper as claimed in claim 3, characterized in that the drive circuit (8) is a drive voltage generator, the drive circuit (8) generating a sinusoidal alternating voltage and transmitting it to the piezoelectric bender (6) via an electric wire.

5. An air-jet loom stopper as claimed in claim 2, characterized in that the longitudinal section of the stopper needle (3) is T-shaped.

6. An air-jet loom stop as claimed in claim 2, characterized in that the elastic element (2) is a spring.

Technical Field

The invention belongs to the technical field of mechanical equipment, and relates to a yarn stopper of an air jet loom.

Background

The yarn stop pin is an important component in a weft storage system of the air jet loom and is mainly used for controlling the working sequence of weft. The traditional yarn stopping pin adopts a method of attracting an electromagnetic coil, the attraction of a key part coil of the traditional yarn stopping pin cannot completely meet the requirement, the working stability of the yarn stopping pin is poor, the service life is still short, and the overall performance is not accurate and reliable.

In addition, the traditional control method of the yarn stopping pin is constant voltage control, namely constant voltage control is realized by connecting a stabilized voltage power supply with two ends of a coil of the yarn stopping pin, so that the strength of the yarn stopping pin is balanced. However, the temperature of the coil of the yarn stop pin can be slowly increased in the using process and then can be kept stable after reaching a certain temperature. Therefore, the traditional method adopting the constant voltage control yarn stop pin has the following problems: under the temperature rising state of the yarn stopping pin coil, the resistance value of the coil can change along with the rise of the temperature, and the yarn stopping pin is controlled by adopting constant voltage, so that the current flowing through the yarn stopping pin coil changes, and the force of the yarn stopping pin changes. Therefore, the traditional mode of adopting the constant voltage to control the yarn stopping pin has the defects of unbalanced strength of the yarn stopping pin and slow response speed.

The piezoelectric ceramic bending is a bending element that generates a lateral displacement by the driving of an electric field by utilizing the inverse piezoelectric effect of piezoelectric ceramic. Structurally, the double-lamination structure is adopted, two layers of piezoelectric ceramic pieces are arranged in the same polarization direction and are tightly bonded with the middle electrode layer, and the piezoelectric ceramic pieces generate corresponding vibration amplitude under the driving of an alternating power supply and are applied to a micro-displacement driving device. Its technical advantages are quick response, precise control and accurate displacement.

Disclosure of Invention

The invention aims to provide a yarn stopper of an air jet loom, which solves the problem of unbalanced strength of yarn stopping pins in the prior art.

The technical scheme adopted by the invention is that,

a yarn stopper of an air jet loom comprises a yarn stopper pin, a piezoelectric yarn stopper pin driving device and a driving circuit, wherein the yarn stopper pin is connected with the piezoelectric yarn stopper pin driving device through an air path, and the piezoelectric yarn stopper pin driving device is connected with the driving circuit through an electric wire.

Yet another feature of the present invention is that,

the yarn stopping pin comprises a shell a, a yarn stopping needle is placed in an inner cavity of the shell a, the yarn stopping needle comprises a rod body and a plug body which are fastened and connected with each other, the rod body penetrates through the shell a, the peripheral wall of the plug body is attached to the inner wall of the shell a, the inner cavity of the shell a is divided into a first cavity and a second cavity by the plug body, an elastic piece is further connected between one end, away from the rod body, of the plug body and the shell a, a first through hole and a second through hole are formed in the shell a, the first through hole is located on one side of the first cavity, the second through hole is located on one side of the second cavity, and the.

Piezoelectric type stop yarn round pin drive arrangement includes casing b, be equipped with first gas port on the casing b, second gas port and third gas port, first gas port and third gas port are just to setting up, first gas port is connected with the air supply, the second gas port is connected with the second through-hole, the third gas port is the gas vent, communicate with each other with casing b outside, be equipped with the crooked piece of piezoelectricity in the casing b, the stiff end of the crooked piece of piezoelectricity and casing b's inner wall connection, the expansion end is laminated with first gas port and third gas port respectively under the reverse piezoelectric effect, the crooked piece of piezoelectricity passes through the electric wire and is connected with drive circuit.

The driving circuit is a driving voltage generator, generates sine alternating voltage and transmits the sine alternating voltage to the piezoelectric bending sheet through an electric wire.

The longitudinal section of the yarn stopping needle is T-shaped.

The elastic element is a spring.

The invention has the advantages that the lifting and falling of the yarn stopping pin are controlled by adopting the inverse piezoelectric effect of the piezoelectric bending piece, the positive and negative alternating voltage generated by the driving circuit is applied to the piezoelectric bending piece to enable the piezoelectric bending piece to generate vibration, and then the yarn needle is prevented from moving up and down by the conduction control of the air circuit, so that the quick response of the yarn stopping needle is realized.

Drawings

FIG. 1 is a view showing a state where a yarn stopper pin of a yarn stopper of an air jet loom according to the present invention is lifted;

FIG. 2 is a view showing a state where a yarn stopper pin of a yarn stopper of an air jet loom of the present invention is dropped.

In the figure, 1, a shell a, 2, an elastic piece, 3, a yarn stopping needle, 4, an air inlet, 5, a working port, 6, a piezoelectric bending piece, 7, an air outlet, 8, a driving circuit and 9, a shell b.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, the yarn stopper of the air jet loom comprises a yarn stopper pin, a piezoelectric yarn stopper pin driving device and a driving circuit 8, wherein the yarn stopper pin is connected with the piezoelectric yarn stopper pin driving device through an air path, and the piezoelectric yarn stopper pin driving device is connected with the driving circuit 8 through an electric wire.

The yarn stopping pin comprises a shell a1, a yarn stopping needle 3 is arranged in an inner cavity of the shell a1, and the longitudinal section of the yarn stopping needle 3 is T-shaped. The yarn stopping needle 3 comprises a rod body and a stopper body which are fastened and connected with each other, the rod body penetrates through the shell a1, the peripheral wall of the stopper body is attached to the inner wall of the shell a1, the inner cavity of the shell a1 is divided into a first cavity and a second cavity by the stopper body, an elastic part 2 is further connected between one end of the stopper body far away from the rod body and the shell a1, the elastic part 2 is a spring, a first through hole and a second through hole are formed in the shell a1, the first through hole is located on one side of the first cavity, the second through hole is located on one side of the second cavity, and the second through hole is connected with an air.

Piezoelectric type end yarn pin drive arrangement includes casing b9, be equipped with first gas port 4 on casing b9, second gas port 5 and third gas port 7, first gas port 4 and third gas port 7 are just to setting up, first gas port 4 is connected with the air supply, second gas port 5 is connected with the second through-hole, third gas port 7 is the gas vent, communicate with each other with casing b9 outside, be equipped with the crooked piece of piezoelectricity 6 in the casing b9, the stiff end of the crooked piece of piezoelectricity 6 and the inner wall connection of casing b9, the expansion end is laminated with first gas port 4 and third gas port 7 respectively under the reverse piezoelectric effect, the crooked piece of piezoelectricity 6 passes through the electric wire and is connected with drive circuit 8.

The driving circuit 8 is a driving voltage generator, and the driving circuit 8 generates a sinusoidal alternating voltage and transmits the sinusoidal alternating voltage to the piezoelectric bending piece 6 through a wire.

The working principle of the invention is that the driving circuit 8 generates sine alternating voltage, the generated voltage is applied to the piezoelectric bending piece 6 to serve as the driving voltage of the piezoelectric bending piece 6, the movable end of the piezoelectric bending piece 6 vibrates under the inverse piezoelectric effect, so as to be respectively attached to the first air port 4 and the third air port 7, when the movable end of the piezoelectric bending piece 6 is attached to the second air port 7, an air source enters the shell b2 through the first air port 4, and enters the second cavity of the shell a1 through the second air port 5, the air passage and the second through hole, so that the air pressure of the second cavity is increased, and an air pressure difference is formed between the air source and the first cavity, so as to push the yarn stopping needle to lift. When the movable end of the piezoelectric bending piece 6 is attached to the first air port 4, the air source is blocked, the air in the shell b2 is discharged from the third air port 7, the pressure in the shell b2 is reduced, the air pressure difference is formed between the second cavity of the shell a1 and the shell b2, the air in the second cavity sequentially flows into the shell b2 through the second through hole, the air passage and the second air port 5, then is discharged from the third air port 7, and the yarn stopping needle 3 falls under the elastic force of the elastic piece 2. The above process is repeated to complete the lifting and dropping work of the yarn stopper pin.