Warp opening device of weaving machine

Abstract

The invention provides a warp shedding device of a weaving machine, and relates to the technical field of weaving machines. A warp shedding device of a weaving machine comprises sixteen heald frames which are sequentially arranged in an overlapped mode, each heald frame is connected with a transmission mechanism, and each transmission mechanism is driven by an independent driving motor. The driving motors numbered as 1, 6, 7 and 12 are a first group, the driving motors numbered as 2, 8, 13 and 14 are a second group, the driving motors numbered as 3, 5, 11 and 16 are a third group, and the driving motors numbered as 4, 9, 10 and 15 are a fourth group. The driving motors corresponding to the first group and the second group are respectively arranged on two sides of a first reference straight line vertical to the heald frame; and the driving motors corresponding to the third group and the fourth group are respectively arranged on two sides of a second reference straight line vertical to the heald frame. Under the condition that the number and the distance of the heald frames are not changed, a large number of motors with increased sizes can be reasonably and compactly arranged in the direction perpendicular to the width direction of the heald frames, and normal operation is ensured.

Description

Technical Field

[0001] This invention relates to the field of loom technology, and more specifically, to a warp shedding device for a loom. Background Technology

[0002] In the field of high-speed, high-density weaving, electronic dobby or electronic jacquard shedding devices are gradually replacing traditional mechanical shedding mechanisms. The core of these devices lies in equipping each heald frame with an independent linear or servo motor drive unit to achieve complex weaves and high-speed response. As fabric varieties increasingly demand higher heald lifting force and response speed, the drive motors require greater power and torque, directly leading to an increase in motor dimensions, particularly radial width.

[0003] In the prior art, to accommodate multiple drive motors within the limited space of a loom, a common solution is to group the motors and arrange them on both sides of the heald frame stacking direction to utilize the lateral space. For example, the applicant's earlier patent application publication (announcement) number: CN114427138A has disclosed an opening mechanism, including a heald frame and a transmission mechanism. The transmission mechanism is located above the heald frame and has a first rotating shaft and a multi-arm transmission member that rotates around the first rotating shaft. The multi-arm transmission member has a heald lifting arm and two output arms. The upper end of the heald lifting arm constitutes the input end, driving the heald frame to move up and down. A linear motor is provided for each heald frame, and the mover of the linear motor is pivotally connected to the input end of the heald lifting arm via a connecting piece. The linear motors corresponding to every two heald frames form a group. The movers of the two linear motors in the same group are arranged opposite each other and counted along the direction of the first rotating shaft. The linear motors in the odd group are located on one side of the heald lifting arm, and the linear motors in the even group are located on the other side of the heald lifting arm. In each of the two adjacent groups on the same side, one group uses a short connecting piece, and the other group uses a long connecting piece. However, this solution reveals significant limitations when faced with a new generation of wider and more powerful motors: even with motors positioned on both sides, the number of motors required on each side remains relatively large (e.g., eight). Due to advancements in manufacturing processes, the required motor models have changed, with the new models exhibiting even greater widths, significantly exceeding the narrow width and spacing of the heald frame itself. Simply arranging them perpendicular to the heald frame on both sides is clearly insufficient to accommodate all the motors. Therefore, how to rationally and compactly arrange a large number of larger motors under the dual spatial constraints of extremely limited width perpendicular to the heald frame, while ensuring normal operation and maintaining transmission efficiency, heat dissipation, and maintainability, has become a pressing technical challenge in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a warp shedding device for a loom that can reasonably and compactly arrange a large number of motors with increased size in the direction perpendicular to the width of the heald frames while keeping the number and spacing of the heald frames unchanged, and ensure normal operation.

[0005] The embodiments of the present invention are implemented as follows: This application provides a warp shedding device for a loom, comprising 16 heald frames arranged in an overlapping manner, each heald frame being connected to a transmission mechanism, and each transmission mechanism being driven by an independent drive motor; The 16 drive motors are numbered 1 to 16 in sequence according to the arrangement of the heald frames they drive; All drive motors are divided into two groups according to their numbers: the first group consists of drive motors whose numbers have a remainder greater than 3 when modulo 6, and the second group consists of drive motors whose numbers have a remainder less than 3 when modulo 6; all drive motors in the first group and all drive motors in the second group are located on both sides of the stacking direction of the heald frame. The drive motors in the first large group are further divided into a first group and a second group. The drive motors in the first group are numbered 1, 6, 7, 12, and the drive motors in the second group are numbered 2, 8, 13, 14. The drive motors in the first group and the drive motors in the second group are located on both sides of a first reference line perpendicular to the heald frame. The drive motors in the second group are further divided into a third group and a fourth group. The drive motors in the third group are numbered 3, 5, 11, and 16, respectively, and the drive motors in the fourth group are numbered 4, 9, 10, and 15, respectively. The drive motors in the third group and the drive motors in the fourth group are located on both sides of a second reference line perpendicular to the heald frame.

[0006] In some embodiments of the present invention, each of the above-mentioned transmission mechanisms and its corresponding heald frame are hinged through two hinge points. The transmission mechanism drives the heald frame to reciprocate at the two hinge points, and the two hinge points are respectively located on the first reference line and the second reference line.

[0007] In some embodiments of the present invention, the drive motors located in the same group are equidistant from the adjacent first or second reference line.

[0008] In some embodiments of the present invention, a bracket is also included, on which each of the drive motors is disposed.

[0009] In some embodiments of the present invention, the width of each of the above-described transmission mechanisms is less than or equal to the width of the heald frame, and the transmission mechanism is projected within the width range of the heald frame.

[0010] In some embodiments of the present invention, the drive motor is a linear motor.

[0011] In some embodiments of the present invention, the linear motor described above is a permanent magnet linear synchronous motor.

[0012] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: This invention divides the drive motors into two large groups, left and right. Furthermore, each large group is subdivided into two smaller groups, arranged on either side of two reference lines. This creatively distributes the 16 motors into four relatively independent installation areas (i.e., the areas corresponding to the first to fourth groups) defined by the sides of the heald frame and the two reference lines. This reduces the lateral space requirement for motor installation from the traditional single-sided concentration of eight motors to a distribution of four areas, each accommodating four motors, thus alleviating lateral space pressure. Simultaneously, the drive motors corresponding to the two large groups are divided according to the rule of "numbering modulo 6 remainder". Finally, the drive motors corresponding to the first group are numbered 1, 6, 7, 12, and the drive motors corresponding to the second group are numbered 2, 8, 13, 14. The drive motors corresponding to the first and second groups are located on either side of a first reference line perpendicular to the heald frame. Similarly, the drive motors corresponding to the third group are numbered 3, 5, 11, 16, and the drive motors corresponding to the fourth group are numbered 4, 9, 10, 15. The aforementioned arrangement of the drive motors increases the width of each drive motor in the direction perpendicular to the heald frame. Specifically, it increases the width of the heald frame structure corresponding to each drive motor by the width of 5 to 6 consecutively stacked heald frames, further increasing the installation space for the drive motors to accommodate wider drive motors. Therefore, this invention can reasonably and compactly arrange a large number of larger motors in the direction perpendicular to the width of the heald frame while maintaining the same number and spacing of heald frames, and ensure normal operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the transmission mechanism arrangement rotating 90° according to an embodiment of the present invention; Figure 2 This is a top view of an embodiment of the present invention rotated 90°; Figure 3 This is a top view of the installation of the drive motors in the first group in this embodiment of the invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5This is a top view of the installation of the drive motors in the second group in this embodiment of the invention; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This is a front view of an embodiment of the present invention; Figure 8 This is a schematic diagram of the installation structure of the drive motor in the second group of embodiments of the present invention; Figure 9 This is a schematic diagram of the installation structure of the drive motor in the first group of embodiments of the present invention; Figure 10 This is a schematic diagram of the installation structure of the drive motor in the fourth group of embodiments of the present invention; Figure 11 This is a schematic diagram of the installation structure of the drive motor in the third group of embodiments of the present invention.

[0015] Icons: 1a-Heald frame; 2a-Drive motor; 3a-Transmission mechanism; 301a-First crank; 302a-Second crank; 303a-First heald lifting arm; 304a-Second heald lifting arm; 305a-First connector; 306a-Second connector; 4a-Bracket; 5a-Connecting rod; 6a-Auxiliary rod; 7-First reference line; 8-Second reference line. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention. Example

[0018] Please refer to Figures 1-11This embodiment provides a warp shedding device for a loom, comprising 16 heald frames 1a arranged in overlapping order. Each heald frame 1a is connected to a transmission mechanism 3a, and each transmission mechanism 3a is driven by an independent drive motor 2a. The 16 drive motors 2a are numbered from 1 to 16 according to the arrangement order of the heald frames 1a they drive. All drive motors 2a are divided into two major groups according to their numbers: drive motors 2a with a remainder greater than 3 when the number is modulo 6 are in the first major group, and drive motors 2a with a remainder less than 3 when the number is modulo 6 are in the second major group. All drive motors 2a in the first major group and all drive motors 2a in the second major group are located on opposite sides of the stacking direction of the heald frames 1a. The drive motors 2a in the first major group are further divided into a first subgroup and a second subgroup. The drive motors 2a in the first subgroup are numbered 1, 6, 7, 12, and the drive motors 2a in the second subgroup are numbered 2, 8, 13, 14, respectively. The drive motors 2a in the first subgroup and the drive motors 2a in the second subgroup are located on opposite sides of a first reference straight line 7 perpendicular to the heald frames 1a. The drive motors 2a in the second group are further divided into the third group and the fourth group. The drive motors 2a in the third group are numbered 3, 5, 11, and 16, respectively, and the drive motors 2a in the fourth group are numbered 4, 9, 10, and 15, respectively. The drive motors 2a in the third group and the drive motors 2a in the fourth group are located on both sides of a second reference straight line 8 perpendicular to the heald frame 1a.

[0019] In this embodiment, the drive motors 2a are divided into two large groups, left and right. Furthermore, each large group is subdivided into two smaller groups, arranged on either side of two reference lines. This creatively distributes the 16 motors into four relatively independent installation areas (i.e., the areas corresponding to the first to fourth groups) defined by the sides of the frame 1a and the two reference lines. This reduces the lateral space requirement for motor installation from the traditional single-sided concentration of eight motors to a distributed distribution of four motors per area, thus alleviating lateral space pressure.

[0020] In the prior art disclosed in the applicant's earlier application, the width of a heald frame 1a is cm. Odd-numbered linear motors (equivalent to drive motors 2a) are located on one side of the heald arm, and even-numbered linear motors are located on the other side. In each of the two adjacent groups on the same side, one group uses a short connecting piece, and the other group uses a long connecting piece. In the aforementioned disclosed prior art structure, one linear motor can occupy a mounting space of 3 heald frame thicknesses (4cm), which is sufficient for its installation. Similarly, each linear motor has 4cm of mounting space, which is sufficient for its installation.

[0021] In this embodiment, the drive motors 2a corresponding to the two large groups are divided according to the rule of "numbering modulo 6 remainder". Finally, the drive motors 2a corresponding to the first group are numbered 1, 6, 7, 12, and the drive motors 2a corresponding to the second group are numbered 2, 8, 13, 14. The drive motors 2a corresponding to the first group and the drive motors 2a corresponding to the second group are respectively arranged on both sides of a first reference straight line 7 perpendicular to the heald frame 1a. The above-mentioned arrangement of drive motors 2a can increase the width of each drive motor 2a in the direction perpendicular to the heald frame 1a. Specifically, it can increase the installation space of each drive motor 2a to the width of 5 to 6 consecutively stacked heald frames 1a, which can further increase the installation space of drive motors 2a to accommodate wider drive motors 2a and avoid the problem of mutual interference between adjacent drive motors 2a, thus preventing installation problems.

[0022] Therefore, the present invention can, without changing the number and spacing of the heald frames 1a, reasonably and compactly arrange a large number of motors with increased size in the direction perpendicular to the width of the heald frames 1a, while ensuring normal operation. Please refer to Figures 7-11 Specifically, in this embodiment, each transmission mechanism 3a is hinged to its corresponding heald frame 1a through two hinge points. The transmission mechanism 3a drives the heald frame 1a to reciprocate at these two hinge points, which are located on the first reference line 7 and the second reference line 8, respectively. Positioning the two hinge points between the transmission mechanism 3a and the heald frame 1a on the first reference line 7 and the second reference line 8 means that the four power transmission paths (starting from the four groups of drive motors 2a) ultimately converge to two distinct lines of force action. This structure organizes the output force of the four spatially dispersed drive motor groups 2a onto two distinct "force axes" before transmitting it to the heald frame 1a. This simplifies the force transmission path, reduces torque and unnecessary internal forces caused by the arbitrary distribution of connection points, and makes the motion more direct and efficient. Furthermore, the drive motors 2a are dispersed according to the above rules, while the hinge points converge to the two reference lines. This "divergent installation and convergent effect" design perfectly solves the contradiction that the drive motor 2a body needs to be distributed due to its large size, but the power input point needs to be relatively concentrated to avoid the heddle frame 1a being twisted by force.

[0023] Please refer to Figure 1Furthermore, in this embodiment, the drive motors 2a located in the same group are equidistant from the adjacent first reference line 7 or second reference line 8. In the prior art disclosed in the applicant's earlier application, linear motors located on the same side need to be installed in a staggered manner, using short connecting pieces and long connecting pieces to connect with the corresponding transmission mechanism 3a in order to install the linear motors. In this embodiment, the drive motors 2a do not need to be installed in a staggered manner, and the drive motors 2a can be installed reasonably. Therefore, the drive motors 2a in the same group are equidistant from the adjacent first reference line 7 or second reference line 8, which effectively shortens the overall installation length of the drive motors 2a in the corresponding direction, further saving installation space and making the entire structure more compact.

[0024] Please refer to Figures 4-7 In some embodiments of this example, the warp shedding device of the loom further includes a bracket 4a, on which each drive motor 2a is mounted. The bracket 4a is used to mount the drive motor 2a, fixing all drive motors 2a onto a unified rigid bracket 4a, rather than dispersing them on the loom frame, thus forming an independent drive module. This improves the overall rigidity of the entire drive unit, ensures the accuracy of the relative positions of the motors, and facilitates the installation, debugging, and maintenance of the entire module.

[0025] In this embodiment, the width of each transmission mechanism 3a is less than or equal to the width of the heald frame 1a, and the transmission mechanism 3a is projected within the width range of the heald frame 1a. The fact that the width of the transmission mechanism 3a is less than or equal to the width of the heald frame 1a allows the transmission mechanisms 3a to be arranged sequentially in the direction perpendicular to the heald frame 1a, avoiding interference between adjacent transmission mechanisms 3a due to width issues.

[0026] Furthermore, in this embodiment, the aforementioned drive motor 2a is a linear motor. Linear motors are characterized by fast response speed and high precision, enabling precise control of the movement of the heald frame 1a to achieve accurate warp opening. Their operation is smooth and stable, effectively reducing vibration and noise during heald frame 1a movement, thus improving the working stability and reliability of the loom. Moreover, linear motors have excellent dynamic performance, allowing for rapid changes in direction and speed to meet the requirements of different weaving processes regarding warp opening speed and rhythm, thereby improving weaving efficiency. In addition, linear motors have a relatively simple structure, lacking the complex transmission devices required by traditional rotary motors, reducing mechanical wear and the probability of malfunctions, and lowering subsequent maintenance costs. Simultaneously, linear motors have low energy consumption, saving energy consumption for enterprises during long-term continuous operation, reducing production costs, and improving economic efficiency. Specifically, the linear motor in this embodiment is an existing mechanism; if unclear, please refer to the applicant's prior applications.

[0027] In some embodiments of this example, the linear motor is a permanent magnet linear synchronous motor. Permanent magnet linear synchronous motors offer higher efficiency and superior control performance. They utilize permanent magnet excitation, eliminating copper losses in the excitation windings of traditional electrically excited systems, thereby effectively reducing motor energy consumption and further improving energy utilization efficiency. In terms of control, permanent magnet linear synchronous motors can achieve precise speed and position control with extremely fast response times, reacting instantly to control signals to ensure that the movement of the heald frame 1a strictly follows preset parameters, achieving high-precision control of warp opening. Simultaneously, permanent magnet linear synchronous motors have high thrust density, generating significant thrust within a small volume, allowing for a more compact loom structure and saving installation space. Furthermore, the motor exhibits high operational stability, maintaining stable performance during long-term continuous operation, reducing weaving quality problems caused by motor performance fluctuations.

[0028] Furthermore, permanent magnet linear synchronous motors are easier to maintain. Due to their relatively simple structure, lacking complex brushes, commutators, and other easily damaged components, the likelihood of malfunctions is reduced, lowering the difficulty and cost of maintenance. In practical applications, only regular, simple inspections and maintenance are required to ensure normal operation, improving the overall reliability and operating efficiency of the loom.

[0029] Please refer to Figures 4-7It should be noted that each transmission mechanism 3a in this embodiment includes a first crank 301a, a second crank 302a, a first heddle-lifting arm 303a, a second heddle-lifting arm 304a, and a connecting rod 5a. The first crank 301a and the second crank 302a are rotatably mounted on the bracket 4a. The drive motor 2a corresponding to each transmission mechanism 3a is connected to one end of the corresponding first crank 301a to drive that end to reciprocate. One end of the first crank 301a, away from the drive motor 2a, is connected to one end of the connecting rod 5a, and one end of the connecting rod 5a, away from the first crank 301a, is connected to one end of the second crank 302a. A first connecting member 305a is provided on the first crank 301a, and the first connecting member 305a can rotate with the first crank 301a. One end of the first heddle-lifting arm 303a is hinged to the first connecting member 305a, and the other end is hinged to the heddle frame 1a. A second connecting member 306a is provided on the second crank 302a, and the second connecting member 306a can rotate with the second crank 302a. One end of the second heddle arm 304a is hinged to the second connecting member 306a, and the other end is hinged to the heddle frame 1a. The two hinge points of the heddle frame 1a corresponding to the first heddle arm 303a and the second heddle arm 304a are the two hinge points of the transmission mechanism 3a and the corresponding heddle frame 1a. In order to enable the drive motor 2a to drive the first crank 301a to rotate, the drive motor 2a and the first crank 301a are connected by an auxiliary rod 6a. The auxiliary rod 6a converts the linear reciprocating motion of the drive motor 2a into the rotary reciprocating motion of the first crank 301a. During the reciprocating rotation of the first crank 301a, the first heddle-lifting arm 303a will reciprocate up and down, simultaneously driving the connecting rod 5a to move. This causes the connecting rod 5a to drive the second crank 302a to reciprocate, thus synchronously driving the second heddle-lifting arm 304a to reciprocate up and down. In this way, the first heddle-lifting arm 303a and the second heddle-lifting arm 304a can reciprocate up and down synchronously, thereby driving the corresponding heddle frame 1a to reciprocate up and down.

[0030] Please refer to Figure 1 The first crank 301a is adjusted to accommodate the position of the drive motor 2a. The motors corresponding to the first crank 301a are respectively arranged on both sides of the heel counter 1a. For example, if the drive motor 2a corresponding to the heel counter 1a is in the first group, the corresponding first crank 301a is located on the first reference line 7; if the drive motor 2a corresponding to the heel counter 1a is in the second group, the corresponding second crank 302a is located on the second reference line 8.

[0031] It should be noted that the transmission mechanism 3a described above is only one implementation method of this embodiment. In other embodiments, the transmission mechanism 3a can also be other structures. For example, a structure that uses synchronous gears to drive the movement of two cranks, etc.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A warp thread shedding device for a loom, characterised in that, 16 harness frames are arranged in sequence, each of the harness frames is connected with a transmission mechanism, and each of the transmission mechanisms is driven by an independent drive motor; 16 drive motors are numbered in sequence according to the arrangement order of the harness frames driven by the drive motors, and are numbered as 1 to 16; All drive motors are divided into two groups according to the numbers thereof: drive motors with a remainder greater than 3 obtained by dividing the numbers thereof by 6 belong to a first group, and drive motors with a remainder less than 3 obtained by dividing the numbers thereof by 6 belong to a second group; all drive motors of the first group and all drive motors of the second group are respectively located on two sides in the stacking direction of the harness frames; The drive motors in the first group are further divided into a first subgroup and a second subgroup, the drive motor numbers corresponding to the first subgroup are 1, 6, 7 and 12 respectively, and the drive motor numbers corresponding to the second subgroup are 2, 8, 13 and 14 respectively, the drive motors corresponding to the first subgroup and the drive motors corresponding to the second subgroup are respectively arranged on two sides of a first reference straight line perpendicular to the harness frames; The drive motors in the second group are further divided into a third subgroup and a fourth subgroup, the drive motor numbers corresponding to the third subgroup are 3, 5, 11 and 16 respectively, and the drive motor numbers corresponding to the fourth subgroup are 4, 9, 10 and 15 respectively, the drive motors corresponding to the third subgroup and the drive motors corresponding to the fourth subgroup are respectively arranged on two sides of a second reference straight line perpendicular to the harness frames.

2. The loom warp thread shedding device according to claim 1, characterized in that, Each transmission mechanism is hinged with the corresponding harness frame through two hinge points, the transmission mechanism drives the harness frame to reciprocate through the two hinge points, and the two hinge points are respectively located on the first reference straight line and the second reference straight line.

3. The loom warp thread shedding device according to claim 2, wherein, The drive motors in the same subgroup are located at the same distance from the adjacent first reference straight line or second reference straight line.

4. The loom warp thread shedding device according to claim 3, wherein, The device further comprises a support, and each drive motor is arranged on the support.

5. The loom warp thread shedding device of claim 1 wherein, The width of each transmission mechanism is less than or equal to the width of the harness frame, and the transmission mechanism is projected within the width range of the harness frame.

6. The loom warp thread shedding device of claim 1 wherein, The drive motor is a linear motor.

7. The loom warp thread shedding device according to claim 6, wherein, The linear motor is a permanent magnet linear synchronous motor.

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