阅读说明：本技术 压电驱动柔性铰接止纱销 (Piezoelectric driving flexible hinged yarn stop pin ) 是由 林晓焕 李峙毅 陈勇洁 吕广雷 景春晖 于 2020-12-29 设计创作，主要内容包括：本发明公开了压电驱动柔性铰接止纱销,包括控制系统和止纱机构,止纱机构包括壳体,壳体内设置有压电弯曲片,压电弯曲片外套接有第一柔性铰链,第一柔性铰链垂直连接有第二柔性铰链,壳体侧壁上开设有通孔,第二柔性铰链自由端连接有止纱针,止纱针穿过通孔；压电弯曲片与控制系统电性连接。以第一柔性铰链、第二柔性铰链作为传动机构,将压电弯曲片的弯曲运动转变为直线运动；第二柔性铰链垂直位于第一柔性铰链上端面,用以抵消压电弯曲片沿其轴线方向的微小位移,二者共同保证止纱针做直线运动,不存在偏角,提高了止纱的精准度；结构简单,成本低。(The invention discloses a piezoelectric driving flexible hinged yarn stopping pin which comprises a control system and a yarn stopping mechanism, wherein the yarn stopping mechanism comprises a shell, a piezoelectric bending piece is arranged in the shell, a first flexible hinge is sleeved outside the piezoelectric bending piece, the first flexible hinge is vertically connected with a second flexible hinge, a through hole is formed in the side wall of the shell, the free end of the second flexible hinge is connected with a yarn stopping needle, and the yarn stopping needle penetrates through the through hole; the piezoelectric bending piece is electrically connected with the control system. The first flexible hinge and the second flexible hinge are used as transmission mechanisms to convert the bending motion of the piezoelectric bending piece into linear motion; the second flexible hinge is vertically positioned on the upper end face of the first flexible hinge and used for offsetting the tiny displacement of the piezoelectric bending piece along the axis direction of the first flexible hinge, and the second flexible hinge and the piezoelectric bending piece jointly ensure that the yarn stopping needle does linear motion without deflection angles, so that the yarn stopping precision is improved; simple structure and low cost.)

1. The piezoelectric driving flexible hinged yarn stopping pin is characterized by comprising a control system and a yarn stopping mechanism, wherein the yarn stopping mechanism comprises a shell (1), a piezoelectric bending piece (2) is arranged in the shell (1), a first flexible hinge (3) is sleeved outside the piezoelectric bending piece (2), the first flexible hinge (3) is vertically connected with a second flexible hinge (4), a through hole (5) is formed in the side wall of the shell (1), the free end of the second flexible hinge (4) is connected with a yarn stopping needle (6), and the yarn stopping needle (6) penetrates through the through hole (5); the piezoelectric bending piece (2) is electrically connected with the control system.

2. Piezoelectric-driven flexible articulated stop pin according to claim 1, characterized in that the control system comprises a controller (7), a drive circuit (8) being connected to the controller (7), the drive circuit (8) being connected to the piezoelectric bender (2).

3. Piezo-electrically driven flexible hinged stopper pin according to claim 1, characterized in that a sliding bearing (9) is arranged in the through hole (5), the stopper pin (6) passing through the sliding bearing (9).

4. The piezoelectric driving flexible hinge yarn stopper pin according to claim 1, wherein the first flexible hinge (3) and the second flexible hinge (4) are both straight circular flexible hinges.

5. The piezoelectric driving flexible hinge yarn stopper pin according to claim 1, wherein the shell (1) comprises an upper shell (10) and a lower shell (11) which are mutually covered, and the through hole (5) is positioned on the lower shell (11).

Technical Field

The invention belongs to the technical field of textile machinery equipment, and relates to a piezoelectric driving flexible structure yarn stopping pin.

Background

The yarn stop pin is one of the important components in the weft insertion control unit of the weaving machine, and the fixed-length unwinding of the weft yarn is completed through the lifting and falling of the pin, and the rotating speed of the weaving machine is influenced.

At present, the yarn stopping pin matched with the domestic and foreign weaving machines is an electromagnetic yarn stopping pin, and because of the defects of an excitation coil, the electromagnetic yarn stopping pin has two problems: firstly, the temperature of the coil can be slowly increased due to long-time work, and the resistance value can be changed along with the increase of the temperature, so that the current flowing through the yarn stop pin coil is changed, and the defect of unbalanced strength of the yarn stop pin is caused; secondly, when the coil is powered on, the magnetizing of the yarn stopping needle needs a longer time, and the demagnetization of the yarn stopping needle can not be carried out immediately when the coil is powered off, so that the response frequency of the yarn stopping pin is directly influenced, and in addition, the consistency of the yarn stopping pin assembled by the same loom is poor, thereby restricting the requirements of the novel shuttleless loom on the aspects of rotating speed improvement and energy conservation.

Disclosure of Invention

The invention aims to provide a piezoelectric driving type flexible hinged yarn stopping pin, which solves the problem of low yarn stopping time precision in the prior art.

The technical scheme adopted by the invention is that the piezoelectric driving flexible hinged yarn stopping pin is suitable for a shuttleless loom and comprises a control system and a yarn stopping mechanism, wherein the yarn stopping mechanism comprises a shell, a piezoelectric bending piece is arranged in the shell, a first flexible hinge is sleeved outside the piezoelectric bending piece, the first flexible hinge is vertically connected with a second flexible hinge, a through hole is formed in the side wall of the shell, the free end of the second flexible hinge is connected with a yarn stopping needle, and the yarn stopping needle penetrates through the through hole; the piezoelectric bending piece is electrically connected with the control system.

The invention is also characterized in that:

the control system comprises a controller, the controller is connected with a driving circuit, and the driving circuit is connected with the piezoelectric bending piece.

A sliding bearing is arranged in the through hole, and the yarn stopping needle penetrates through the sliding bearing.

The first flexible hinge and the second flexible hinge are both straight round flexible hinges.

The shell comprises an upper shell and a lower shell which are mutually covered, and the through hole is positioned on the lower shell.

The invention has the beneficial effects that:

the piezoelectric driving flexible hinged yarn stop pin takes the first flexible hinge and the second flexible hinge as transmission mechanisms, and converts the bending motion of a piezoelectric bending piece into linear motion; the second flexible hinge is vertically positioned on the upper end face of the first flexible hinge and used for offsetting the tiny displacement of the piezoelectric bending piece along the axis direction of the first flexible hinge, and the second flexible hinge and the piezoelectric bending piece jointly ensure that the end yarn stopping needle does linear motion without deflection angles, so that the yarn stopping precision is improved; simple structure and low cost.

Drawings

FIG. 1 is a block diagram of a piezoelectrically actuated flexible hinge stop pin of the present invention;

fig. 2 is another operational state diagram of the piezoelectrically actuated flexible hinged yarn stop pin of the present invention.

In the figure, 1 is a shell, 2 is a piezoelectric bending sheet, 3 is a first flexible hinge, 4 is a second flexible hinge, 5 is a through hole, 6 is a yarn stopping needle, 7 is a controller, 8 is a driving circuit, 9 is a sliding bearing, 10 is an upper shell, and 11 is a lower shell.

Detailed Description

The present invention will be described in detail with reference to the following embodiments.

The invention discloses a piezoelectric driving flexible hinged yarn stopping pin, which comprises a control system and a yarn stopping mechanism as shown in figure 1, wherein the yarn stopping mechanism comprises a shell 1, the shell 1 comprises an upper shell 10 and a lower shell 11 which are mutually covered, a piezoelectric bending piece 2 is arranged in the shell 1, a first flexible hinge 3 is sleeved outside the piezoelectric bending piece 2, the first flexible hinge 3 is parallel to the axis of the piezoelectric bending piece 2, the first flexible hinge 3 is vertically connected with a second flexible hinge 4, one end of the second flexible hinge 4 is positioned on the upper surface of the first flexible hinge 3, the side wall of the lower shell 11 is provided with a through hole 5, the free end of the second flexible hinge 4 is connected with a yarn stopping needle 6, and the yarn stopping needle 6 penetrates through the through hole 5 and extends out of the shell 1 to stop yarn; the piezoelectric bending piece 2 is electrically connected with the control system.

The control system comprises a controller 7, the controller 7 is connected with a driving circuit 8, and the driving circuit 8 is connected with the piezoelectric bending piece 2.

A sliding bearing 9 is arranged in the through hole 5, and the yarn stopping needle 6 penetrates through the sliding bearing 9.

The first flexible hinge 3 and the second flexible hinge 4 are both straight flexible hinges.

The working process of the piezoelectric yarn stopper pin suitable for the air jet loom is as follows:

as shown in fig. 2, the driving circuit 8 generates a forward sine alternating voltage, and transmits the generated voltage to the piezoelectric bending piece 2 through an electric wire, as a driving voltage of the piezoelectric bending piece 2, under the reverse piezoelectric effect, the movable end of the piezoelectric bending piece 2 generates bending motion and micro stretching displacement along the axis direction of the piezoelectric bending piece, so as to drive the first flexible hinge 3 to move along the axis direction of the first flexible hinge, convert the bending motion into linear motion, further drive the second flexible hinge 4 to move, counteract the micro stretching displacement along the axis direction of the piezoelectric bending piece 2, lift the yarn stopping needle 6, and allow the yarn to pass through; the driving circuit 8 generates negative sine alternating voltage, the piezoelectric bending piece 2 generates reverse bending motion and micro stretching displacement along the axis direction of the piezoelectric bending piece, the first flexible hinge 3 is driven to move in the reverse direction to generate linear motion, the second flexible hinge 4 is driven to counteract the micro stretching displacement of the piezoelectric bending piece along the axis direction of the piezoelectric bending piece, the yarn stopping pin falls down, and yarn stopping is completed.

Through the mode, the piezoelectric driving flexible hinged yarn stopper pin takes the first flexible hinge and the second flexible hinge as the transmission mechanism, and converts the bending motion of the piezoelectric bending piece into the linear motion; the second flexible hinge is vertically positioned on the upper end face of the first flexible hinge and used for offsetting the tiny displacement of the piezoelectric bending piece along the axis direction of the first flexible hinge, and the second flexible hinge and the piezoelectric bending piece jointly ensure that the end yarn stopping needle does linear motion without deflection angles, so that the yarn stopping precision is improved; simple structure and low cost.