Needle selection device with elastic armature hook, assembly of needle selection device and electronic jacquard machine

Abstract

The invention discloses a needle selection device with an elastic armature hook, an assembly of the needle selection device and an electronic jacquard machine. The needle selection device comprises a substrate, the elastic armature hook, an electromagnet, a vertical hook and a pulley block. The electromagnet is made of an I-shaped iron core and a coil and arranged in the middle of the top end of the front surface of the substrate; the two elastic armature hooks are respectively arranged on the left side and the right side of the electromagnet through elastic armature hook mounting blocks on the substrate; the two vertical hooks are vertical hooks with convex edges, are respectively arranged in the linear vertical hook guide rails on the two sides of the substrate and are positioned on the outer sides of the two elastic armature hooks; the pulley block is arranged in a pulley block sliding groove in the middle of the substrate and connected with the bottom ends of the two vertical hooks and the head line connector through an upper pulley line and a lower pulley line respectively. According to the invention, the elastic armature hook is prepared by compounding a plurality of materials, has good elasticity, rigidity, wear resistance and magnetic conductivity, not only meets high-performance requirements of armature hook materials in all directions, but also achieves the beneficial effects of simple structure, small coil power consumption, good product consistency, high long-term operation reliability and low manufacturing cost.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic jacquard machines of textile machinery, and in particular relates to a needle selection device with an elastic armature hook and a component thereof and an electronic jacquard machine. Background Art

[0002] In recent years, electronic jacquard machines have made great progress. Electronic jacquard machines use a key component called a needle selection device (also called a solenoid valve, electromagnet, assembly, etc.). The needle selection device is the executive component of the electronic jacquard machine, and its function is to convert electrical signals into the rise and fall of the warp yarn. The working principle of the needle selection device is a well-known technology. It is similar to the principle of an electromagnetic relay and is a monostable device: when the coil is not energized, there is no electromagnetic force and the armature is not attracted. Under the action of the reset spring, the armature magnetic pole is away from the core magnetic pole and is in position 1 (stable position); when the coil is energized, an electromagnetic force is generated to attract the armature, and the armature magnetic pole is attracted to the core magnetic pole, and the armature is in position 2 (temporary steady state position).

[0003] In the needle selection device, the armature is made into a hook shape, called an armature hook, and there is also a vertical hook that can move up and down with the jacquard knife. When the vertical hook is unhooked from the armature hook, it is called the "unhooked" state, and the vertical hook moves with the knife; when the vertical hook is hooked on the armature hook, it is called the "hung" state, and the vertical hook is detached from the knife and does not move with the knife. It can usually be designed so that position 1 (stable position) is the "hung" state, and position 2 (temporary steady position) is the "unhooked" state, or vice versa. Since the vertical hook connects the harness and the heald to control the warp yarn, the rise and fall of the vertical hook corresponds to the rise and fall of the warp yarn. In large-scale commercially produced needle selection devices, 8 electromagnets and corresponding mechanisms are often made into a combination for easy installation and maintenance, which is called a component.

[0004] Jacquard machines are divided into single-action and double-action types. The double-action type has a complex mechanism. One jacquard needle corresponds to two vertical hooks, and the two vertical hooks are converted into the rise and fall of one jacquard needle (first thread) through a pulley block. The double-action type causes less damage to the warp yarn and is conducive to weaving. Currently, most electronic jacquard machines are double-action type. The two mainstream jacquard devices on the market are produced by Stäubli and Bonas respectively.

[0005] The structure of the needle selection device of the jacquard machine of Stäubli is: I-shaped iron core coil, armature hook made of soft iron, rotating shaft, spring, vertical hook, pulley block, substrate, etc.; its characteristics are compact structure, low coil power consumption, and adaptability to high speed; its disadvantages are complex structure, high production cost, high parts precision requirements, and high requirements for the use environment.

[0006] The structure of the jacquard machine needle selection device of Bonas Company is: two cylindrical iron core coils, with magnetic conductive sheets at both ends, the electromagnet has a narrow and long inclined track-shaped magnetic pole pair, and the hook replaces the functions of the four parts of the vertical hook, armature hook, rotating shaft and spring; when the coil is energized, the magnetic pole pair of the electromagnet attracts the hook, the hook is close to the track-shaped magnetic pole pair and bends and deforms, and hangs on the hook, which is the hanging state; when the coil is not energized, the hook remains upright, which is the detached state; its characteristics are simple structure, low cost, and good adaptability to the flower and hair environment; its disadvantages are that the hook tip / hook depth of the hook is too small, easy to wear, short service life, large coil power consumption, and large mechanism size.

[0007] The design of Bonas' hook is very unique, but it has very high requirements on materials. It must be a soft iron material with good elasticity, rigidity and wear resistance. Usually, soft iron materials with good magnetic conductivity have poor elasticity, rigidity and wear resistance, while materials that meet the requirements of elasticity, rigidity and wear resistance have poor magnetic conductivity. This is also the reason for the shortcomings of Bonas' current structure. Summary of the invention

[0008] In order to make up for the deficiencies of the prior art, the present invention provides a needle selection device with an elastic armature hook, a component thereof and an electronic jacquard machine.

[0009] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0010] A needle selection device with an elastic armature hook comprises a substrate and a group of elastic armature hooks, an electromagnet, a vertical hook and a pulley block arranged on the substrate; the electromagnet is fixedly mounted on the middle of the top end of the front side of the substrate, and the electromagnet is made of an I-shaped iron core and a coil; there are two elastic armature hooks, which are deformably arranged on the left and right sides of the electromagnet through elastic armature hook mounting blocks located on the substrate; there are two vertical hooks, which are slidably mounted in linear vertical hook guides on both sides of the substrate, respectively, the vertical hooks are vertical hooks with convex edges, and the two vertical hooks are located on the outsides of the two elastic armature hooks; the pulley block is slidably arranged in the pulley block slide groove in the middle of the substrate, the pulley block is connected to the bottom ends of the two vertical hooks through an upper pulley line, and the pulley block is connected to the first line joint located below the substrate through a lower pulley line;

[0011] The elastic armature hook can generate elastic bending deformation toward the I-beam core under the pushing action of the convex edge of the vertical hook, so that the elastic armature hook can contact the long magnetic pole and the short magnetic pole of the I-beam core simultaneously when the coil is energized to form a closed magnetic circuit; the elastic armature hook can also generate elastic straight recovery away from the I-beam core when the convex edge of the vertical hook cancels the pushing action, so that the elastic armature hook is separated from the short magnetic pole of the I-beam core when the coil is not energized to hook the vertical hook on the corresponding side; the vertical hook realizes the hanging state and the detaching state of the jacquard device by cooperating with the elastic armature hook.

[0012] Furthermore, the elastic armature hook is a whole formed by firmly combining the magnetic rod portion, the elastic rod portion and the hook tip portion;

[0013] The main body of the elastic rod is an elastically deformable component; the magnetic conductive rod is fixedly attached to the inner surface of the main body of the elastic rod, and can be deformed and restored together with the main body of the elastic rod, and is used to cooperate with the long and short magnetic poles of the I-shaped iron core to form a closed magnetic circuit; the hook tip is fixedly installed on the outer side of the bottom end of the main body of the elastic rod, and the shape of the hook tip matches the shape of the vertical hook, and is used to cooperate with the vertical hook to realize the hanging state and the unhooking state of the jacquard device;

[0014] A mounting and fixing structure for fixedly connecting with the elastic armature hook mounting block extends from the top of the main body of the elastic rod portion. Under the cooperation of the mounting and fixing structure and the elastic armature hook mounting block, the upper end of the inner side surface of the magnetic conductive rod portion is always in close contact with the long magnetic pole of the I-shaped iron core;

[0015] When the convex edge of the vertical hook does not push the hook tip, the main body of the elastic rod remains in a vertical natural state, and a magnetic gap exists between the lower end of the inner side surface of the magnetic conductive rod and the short magnetic pole of the I-beam core. At this time, the hook tip is hooked with the vertical hook;

[0016] When the convex edge of the vertical hook pushes the hook tip, the main body of the elastic rod is elastically bent and deformed toward the I-beam core, and the lower end of the inner side surface of the magnetic rod is close to the short magnetic pole of the I-beam core so that the I-beam core can attract it to the closed magnetic circuit position.

[0017] Furthermore, the elastic rod is made of an elastic material, and the elastic material is a metal or non-metal material including a copper sheet, a steel sheet, or a nylon sheet;

[0018] The magnetic rod is made of a soft magnetic material, which is a soft magnetic sheet with soft magnetic properties, and is combined with the elastic rod by adhesive bonding or thermal bonding, and can be bent and deformed with the elastic rod;

[0019] The hook tip is made of a wear-resistant material, which is a metal or non-metal material, and the vertical hook and the hook tip are made of the same wear-resistant material.

[0020] Furthermore, an end reinforcement structure for fixedly connecting with the hook tip portion extends from the bottom of the main body of the elastic rod portion, and the end reinforcement structure is an upwardly inclined F-shaped structure. The hook tip portion is fixedly mounted on the outer side of the bottom end of the elastic rod portion through the good fit of the end reinforcement structure.

[0021] Furthermore, two elastic armature hook fixing grooves are provided on the elastic armature hook mounting block, and the two elastic armature hooks are respectively embedded in the elastic armature hook fixing grooves on the corresponding sides through their own mounting and fixing structures to achieve positioning, mounting and fixing with the substrate, and when the jacquard device is in a hanging state, the pulling force of the vertical hook is transmitted to the substrate through the elastic armature hook, and finally transmitted to the jacquard device frame fixing the substrate.

[0022] Further, according to the different arrangement positions of the elastic armature hook mounting block on the substrate, the mounting and fixing structure has the following two forms;

[0023] When the elastic armature hook mounting block is located outside the linear vertical hook guide rail, the mounting and fixing structure is a U-shaped structure bent downward;

[0024] When the elastic armature hook mounting block is located on the inner side of the linear vertical hook guide rail, the mounting and fixing structure is an upwardly inclined L-shaped structure.

[0025] Furthermore, the vertical hook includes a rod-shaped body, a side ear portion for hooking with the blade of a knife is provided in the middle part of the outer side of the rod-shaped body, a top hook portion is provided at the top end of the inner side of the rod-shaped body, and the hook tip of the top hook portion is close to the edge of the inner side of the rod-shaped body, and the hook bottom of the top hook portion is close to the axis of the rod-shaped body; a convex edge is provided at the upper edge of the inner side of the rod-shaped body and below the top hook portion, and the convex edge protrudes laterally from the hook tip of the top hook portion; the contour curve of the convex edge is divided into a pushing section located in the upper section and a retaining section located in the lower section, the pushing section is an inclined curve starting from the hook bottom of the top hook portion, and the pushing section can produce a lateral push on the elastic armature hook in contact with it at the initial stage of the vertical upward movement of the vertical hook, and the retaining section is a straight line parallel to the moving direction of the rod-shaped body. , the holding section is smoothly connected with the pushing section, and the holding section can apply a holding force to the elastic armature hook in contact with it to maintain lateral pushing in the middle and late stages of the vertical upward movement of the vertical hook; the distance from the bottom of the holding section to the bottom of the hook of the top hook part is greater than the distance from the hook tip of the top hook part to the bottom of the hook of the top hook part; the length of the holding section of the convex edge corresponds to the tolerance range of the jacquard machine knife lifting height allowed by the needle selection device to which it belongs; a section of limiting convex edge is provided along the edge of the middle and lower parts of the inner side of the rod-shaped body for engaging with the linear vertical hook guide rail and ensuring that the vertical hook does not produce lateral displacement, and the top end of the limiting convex edge is connected in a parallel straight line with the bottom end of the convex edge holding section to realize the full linear displacement of the vertical hook; at least one shock-absorbing groove for blocking the vibration of the knife lifting is provided between the side ear and the rod-shaped body.

[0026] Furthermore, the pulley block may be a conventional pulley block in an existing needle selection device, or a thin pulley block may be selected.

[0027] A needle selection device assembly is formed by sequentially stacking and assembling a plurality of the above-mentioned needle selection devices with elastic armature hooks.

[0028] A high-density needle selection device, which is based on the above-mentioned needle selection device with elastic armature hooks, and further adds a sealing plate and another group of the elastic armature hooks, the electromagnets, the vertical hooks and the pulley group; wherein, one group of the elastic armature hooks, the electromagnets, the vertical hooks and the pulley group are arranged on the front side of the substrate, and the other group of the elastic armature hooks, the electromagnets, the vertical hooks and the pulley group are arranged on the back side of the substrate, the sealing plate cover is arranged on the front side or the back side of the substrate, and the electromagnets located on the front side and the electromagnets located on the back side are in an up-and-down overlapping relationship, the elastic armature hooks located on the front side and the elastic armature hooks located on the back side are also in an up-and-down overlapping relationship, the length of the vertical hooks located on the front side is longer than the length of the vertical hooks located on the back side, that is, the vertical hooks located on the front side are long vertical hooks, and the vertical hooks located on the back side are short vertical hooks.

[0029] It should be noted that the pulley assembly required by the high-density needle selection device can also have two solutions, one of which is a parallel thin pulley block solution, that is, the thickness of the pulley block is thinned to 2-2.4mm, and the thickness of the two parallel pulley blocks is equal to that of the original pulley block; the other solution is a double-layer pulley block structure stacked up and down, which can also be adapted to high-density electromagnets and corresponding vertical hook structures. Because it is not the key innovation of the present invention, it will not be repeated here.

[0030] A high-density needle selection device assembly is formed by stacking and assembling a plurality of the above-mentioned high-density needle selection devices in sequence, such as a 16-needle high-density needle selection device assembly formed by stacking and assembling 8 of the above-mentioned high-density needle selection devices in sequence.

[0031] It should be noted that the technical solution of the present invention is not limited to the production of 16-needle high-density needle selection device components, and can also be used to produce higher-density needle selection device components.

[0032] An electronic jacquard machine is equipped with the above-mentioned needle selection device assembly or the above-mentioned high-density needle selection device assembly.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The present invention improves the armature hook and adopts a plurality of materials such as elastic material, soft magnetic material and wear-resistant material to compositely manufacture the elastic armature hook. The elastic armature hook not only has good elasticity, rigidity and wear resistance, but also has excellent magnetic conductivity. It not only meets the high performance requirements of various jacquard machines for the armature hook material, but also achieves the beneficial effects of simple structure, low coil power consumption, good product consistency, high long-term operation reliability and reduced manufacturing cost.

[0035] The present invention optimizes and improves the hook unhooking technology, and adopts the full-range linear vertical hook guide rail and the vertical hook convex edge design to form a new hook unhooking technology. This technology can design a larger hook so that there is no need to worry about the difficulty of unhooking the large hook, and sufficient design margin can ensure the reliability of the action under complex working conditions. The full-range linear vertical hook guide rail and the vertical hook convex edge cooperate to ensure the accuracy of the lateral displacement of the convex edge to the elastic armature hook when the vertical hook moves up and down, so that a dynamic magnetic gap range of 0 to 0.3 mm can be achieved. In addition, the distance from the holding section of the vertical hook convex edge to the hook bottom is greater than the distance from the hook tip to the hook bottom. This distance difference is also the distance from the armature hook tip to the vertical hook tip, thereby leaving a hook unhooking margin, which is also a tolerance margin, can prevent misoperation and improve reliability. The retaining section of the convex edge enables the lifting knife to reach the vertical hook switching height (switching from hanging to unhooking) required by the needle selection device within a wide range, and has a wide lifting knife height tolerance range (tolerance margin), which reduces the manufacturing difficulty of the jacquard machine host and improves the reliability of the whole machine action.

[0036] The present invention optimizes and improves the magnetic circuit structure. The elastic armature hook of the present invention has a reduced volume, reduced weight, simplified structure, and a small number of assembled parts, so that the overall structure of the needle selection device using the present invention is compact. The armature hook contacts the side of the I-shaped iron core crossbeam. Under the action of electromagnetic force, the armature hook and the magnetic pole portion of the I-shaped iron core can be automatically aligned. The electromagnet coil of the present invention has low power consumption, reduces the load of the drive circuit, has low energy consumption, and has a low coil temperature. The mechanical deformation of the parts of the needle selection device affected by temperature rise is reduced, and at the same time, the tolerance margin for power supply voltage and ambient temperature is improved, and the reliability of action and control is improved.

[0037] The high-density needle selection device of the present invention has a compact overall structure, a reasonable magnetic circuit design, low electromagnet power consumption, reliable operation, and uses two independent vertical hooks to increase the needle density of the two-position needle selection device, realizing a needle selection device that accommodates two sets of two-position double-action jacquard machines in one unit. The high-density needle selection device of the present invention can realize a 16-needle needle selection device assembly, corresponding to 4×3.5cm 2 The needle density is as high as 11428 needles per square meter, which is twice the needle selection device components commonly used in the market. Therefore, the high-density needle selection device of the present invention is expected to produce an electronic jacquard machine with 20,000 needles or even a larger number of needles.

[0038] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and their accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0040] Figure 1 It is a working principle diagram of the present invention and a front structural diagram of the needle selection device with an elastic armature hook in Example 1 (the pulley block is omitted in the figure);

[0041] Figure 2 is a three-dimensional diagram of the elastic armature hook in Example 1 of the present invention;

[0042] Figure 3 An exploded view of the elastic armature hook in Example 1 of the present invention;

[0043] Figure 4 This is a schematic structural diagram of a vertical hook in Embodiment 1 of the present invention;

[0044] Figure 5An exploded view of the high-density needle selection device in Example 3 of the present invention (the pulley block is omitted in the figure);

[0045] Figure 6 Schematic diagram of the back structure of the high-density needle selection device in Example 3 of the present invention (the pulley block is omitted in the figure);

[0046] Figure 7 1 is a three-dimensional diagram of a high-density needle selection device assembly in Example 4 of the present invention (the pulley block is omitted in the diagram). DETAILED DESCRIPTION

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. The descriptions herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0048] Example 1

[0049] See also Figure 1 As shown, the present invention provides a needle selection device with an elastic armature hook, comprising a substrate 1 and a group of elastic armature hooks 2, electromagnets 3, vertical hooks 4 and pulley blocks (not shown in the figure) arranged on the substrate 1.

[0050] The electromagnet 3 is fixedly mounted at the middle of the top of the front side of the substrate 1. The electromagnet 3 is made of an I-shaped iron core and a coil, and the long magnetic pole of the I-shaped iron core is on the top and the short magnetic pole is on the bottom.

[0051] Each group of the elastic armature hooks 2 has two, which are deformably arranged on the left and right sides of the electromagnet 3 through the elastic armature hook mounting blocks 5 located on the substrate 1. Figure 2-Figure 3 As shown, the elastic armature hook 2 is a whole formed by firmly combining the magnetic rod 201, the elastic rod 202 and the hook tip 203.

[0052] The elastic rod 202 is made of an elastic material, and the elastic material can be a metal or non-metal material such as a copper sheet, a steel sheet, a nylon sheet, etc. The elastic rod 202 is mainly formed by a main body, a mounting and fixing structure 204, and an end reinforcement structure 205. The main body of the elastic rod 202 is an elastically deformable component. The mounting and fixing structure 204 is a U-shaped structure that bends downward, and is formed by bending and extending the top of the main body of the elastic rod 202. The end reinforcement structure 205 is an F-shaped structure that tilts upward, and is formed by bending and extending the bottom of the main body of the elastic rod 202.

[0053] The magnetic rod portion 201 is made of soft magnetic material, and the soft magnetic material can be a soft magnetic sheet with soft magnetic properties, which is fixed to the inner surface of the main body of the elastic rod portion 202 through an adhesive bonding or thermal bonding process, and can bend, deform and restore together with the main body of the elastic rod portion 202, and is used to cooperate with the long and short magnetic poles of the I-beam core to form a closed magnetic circuit.

[0054] The hook tip 203 is made of wear-resistant material, which can be metal or non-metal material, and the vertical hook 4 and the hook tip 203 are made of the same wear-resistant material. The hook tip 203 is fixedly mounted on the outer side of the bottom end of the main body of the elastic rod 202 by good interlocking with the end reinforcement structure 205. The shape of the hook tip 203 matches the shape of the vertical hook 4, and is used to cooperate with the vertical hook 4 to realize the hanging state and the unhooking state of the jacquard device.

[0055] See also Figure 1 As shown, the elastic armature hook mounting block 5 is located at the top of the substrate 1, and an elastic armature hook fixing groove 7 is respectively provided at the left and right ends of the elastic armature hook mounting block 5. During assembly, the two elastic armature hooks 2 are respectively embedded in the elastic armature hook fixing groove 7 on the corresponding side through their respective U-shaped mounting and fixing structures 204 to achieve positioning, mounting and fixing with the substrate 1. At the same time, under the cooperation of the mounting and fixing structure 204 and the elastic armature hook mounting block 5, the upper end of the inner side surface of the magnetic conductive rod portion 201 is always in close contact with the long magnetic pole of the I-shaped iron core.

[0056] The elastic armature hook of the present invention is made of a composite of multiple materials. The needle selection device equipped with the elastic armature hook not only meets the high performance requirements of various aspects on the material, but also achieves the beneficial effects of simple structure, low coil power consumption, good product consistency, high long-term operation reliability and reduced production cost.

[0057] Each group of vertical hooks 4 has two, which are slidably mounted in the linear vertical hook guide rails 6 on both sides of the substrate 1. The vertical hooks 4 are vertical hooks with convex edges, and the two vertical hooks 4 are located outside the two elastic armature hooks 2. Figure 4As shown, the vertical hook 4 includes a rod-shaped body 401, and a side ear portion 402 for hooking with the blade of the lifting knife is provided in the middle of the outer side of the rod-shaped body 401. When working, the side ear portion 402 is directly hung on the blade of the lifting knife, and the lifting knife pulls the vertical hook 4 to move through the side ear portion 402. A top hook portion 403 is provided at the top end of the inner side of the rod-shaped body 401, and the hook tip of the top hook portion 403 is close to the inner edge of the rod-shaped body 401, and the hook bottom of the top hook portion 403 is close to the axis of the rod-shaped body 401. A convex edge is provided at the upper edge of the inner side of the rod-shaped body 401 and below the top hook portion 403, and the convex edge protrudes laterally from the hook tip of the top hook portion 403. The contour curve of the convex edge is divided into a push section 404a located at the upper section and a retaining section 404b located at the lower section. The push section 404a is an inclined curve starting from the bottom of the hook of the top hook portion 403, and the retaining section 404b is a straight line parallel to the moving direction of the rod-shaped body 401. The retaining section 404b smoothly connects with the push section 404a. In the early stage of the upward process of the vertical hook 4, the push section 404a can generate a lateral thrust on the elastic armature hook 2 in contact with it, and in the middle and late stages of the vertical upward movement of the vertical hook 4, the retaining section 404b can exert a retaining force on the elastic armature hook 2 in contact with it to maintain the lateral thrust.

[0058] The pulley block can be slidably arranged in the pulley block slot in the middle of the substrate 1. The pulley block can adopt a conventional pulley block in an existing needle selection device, or a thin pulley block can be selected. The pulley block is connected to the bottom ends of the two vertical hooks 4 through an upper pulley line, and the pulley block is connected to the first line joint located below the substrate 1 through a lower pulley line. The two vertical hooks 4 drive the pulley block to slide up and down through the upper pulley line.

[0059] The working principle of the present invention is as follows:

[0060] See also Figure 1 As shown, Figure 1The left side shows the disengaged state of the jacquard device. When the vertical hook 4 moves upward in the linear vertical hook guide rail 6, the convex edge of the vertical hook 4 applies a stable lateral thrust to the hook tip 203 of the elastic armature hook 2 toward the I-beam core, so that the elastic rod 202 of the elastic armature hook 2 is elastically bent and deformed toward the I-beam core under the pushing action of the convex edge of the vertical hook 4, thereby causing the lower end of the magnetic rod 201 of the elastic armature hook 2 to move horizontally from the static and dynamic magnetic gap position to a position close to the I-beam core. The dynamic magnetic gap position of the short magnetic pole of the core, if the coil of the electromagnet 3 is energized at this time, the attraction force of the electromagnet 3 is greater than the elastic force generated by the bending deformation of the elastic rod 202, and the electromagnet 3 attracts the lower end of the magnetic rod 201 and further moves horizontally from the dynamic magnetic gap position to the closed magnetic circuit position and maintains the attraction state with the short magnetic pole of the I-beam core. At this time, the hook tip 203 does not contact the top hook part 403 of the vertical hook 4, which is the disengaged state of the jacquard device.

[0061] See also Figure 1 As shown, Figure 1 The right side shows the hanging state of the jacquard device. If the coil of the electromagnet 3 is not energized, the I-shaped iron core has no electromagnetic force, so that the short magnetic pole of the I-shaped iron core loses its attraction force on the lower end of the magnetic rod 201. Therefore, the elastic rod 202 of the elastic armature hook 2, under the action of its own elastic force and the blocking of the convex edge of the vertical hook 4, first rebounds outward partially, that is, the lower end of the magnetic rod 201 is separated from the short magnetic pole of the I-shaped iron core, and returns to the dynamic magnetic gap position from the closed magnetic circuit position. When the vertical hook 4 moves downward in the linear vertical hook guide rail 6, since the convex edge of the vertical hook 4 does not contact the hook tip 203 of the elastic armature hook 2 and no longer pushes the hook tip 203 of the elastic armature hook 2, the elastic rod 202 recovers its shape under the effect of its own residual elasticity, and the lower end of the magnetic conductive rod 201 is further reset from the dynamic magnetic gap position to the static magnetic gap position and remains in a straight state. At this time, the hook tip 203 can hang on the hook of the vertical hook 4, which is the hanging state of the jacquard device. In the hanging state of the jacquard device, the tension of the vertical hook 4 is transmitted to the substrate 1 through the elastic armature hook 2, and finally transmitted to the jacquard device frame fixing the substrate 1.

[0062] Preferably, the distance from the bottom of the retaining section 404b to the bottom of the top hook 403 is greater than the distance from the hook tip of the top hook 403 to the bottom of the top hook 403. This distance difference is also the distance between the hook tip 203 of the elastic armature hook 2 and the top hook 403 of the vertical hook 4 in the unhooking state, so it is defined as an unhooking margin, which is a tolerance margin. Figure 4D in the middle represents the unhooking margin. Due to the existence of the unhooking margin D, the hook tip 203 of the elastic armature hook 2 does not contact the top hook portion 403 of the vertical hook 4. Even if vibration or the like occurs, the top hook portion 403 of the vertical hook 4 will not catch the hook tip 203 of the elastic armature hook 2, thereby avoiding the failure of unhooking. The unhooking margin ensures the reliability of the unhooking action under complex working conditions.

[0063] Preferably, the length of the retaining section 404b of the convex edge corresponds to the tolerance range of the jacquard machine knife lifting height allowed by the needle selection device to which it belongs. Within this tolerance range, the elastic armature hook 2 in contact with the convex edge remains in the dynamic magnetic gap position. The retaining section 404b is actually a straight section. In this section of the retaining section 404b, the elastic armature hook 2 in contact with it will not have lateral displacement, but will remain in the dynamic magnetic gap position. The dynamic magnetic gap is the distance between the magnetic rod portion 201 of the elastic armature hook 2 and the short magnetic pole of the I-beam core under the action of the convex edge of the elastic armature hook 2. The value range of the dynamic magnetic gap is 0 to 0.3 mm.

[0064] It is very important to limit the dynamic magnetic gap to a relatively small range, such as 0 to 0.3 mm. This is the key to the present invention and also a tolerance margin issue. In the case of a small magnetic gap, the electromagnet coil can generate sufficient attraction with less power consumption to attract the armature hook to the magnetic pole and maintain this state. It is not impossible to limit the dynamic magnetic gap to 0.4 mm, but a simple calculation shows that the electromagnet needs about 80% more electromagnetic force, which is obviously not conducive to low-power design. Of course, the power consumption is lower when the dynamic magnetic gap is set to 0.2 mm, but this value also has the function of offsetting the processing errors, assembly errors, and deformation errors of various parts during operation. Therefore, setting the dynamic magnetic gap to 0.2 mm means that the precision requirements for the parts are higher, which increases the cost.

[0065] The lower end of the magnetic rod of the elastic armature hook of the present invention can move between three positions: from the static magnetic gap to the dynamic magnetic gap is a section with a larger range, which is achieved by the convex edge of the vertical hook pushing the elastic armature hook to bend and deform when the vertical hook moves upward, and then the lateral displacement is achieved (using external force to achieve a larger range of displacement); from the dynamic magnetic gap to the closed magnetic circuit position is a section with a smaller range, which is achieved by the electromagnetic force after the electromagnet is energized (using internal force to achieve a smaller range of displacement).

[0066] In the actual operation of the jacquard machine, due to the transmission mechanism and mechanical stress, there are errors in the position of the blade of the multi-piece lifting knife. The sheet lifting knife is up to 2 meters (the lifting knife of the jacquard machine with a large needle number is longer), and the lifting knife will be deformed during work, resulting in errors in the position of different points on the same piece of lifting knife. The jacquard fabric pattern is different, resulting in uneven force on different positions of the same piece of lifting knife, and even the force on both sides of the blade and the two ends of the lifting knife will produce a torsional moment, which will cause the lifting knife to be permanently deformed in severe cases. So there is a concept of "lifting knife tolerance", which refers to the range of the height difference of the blade edge allowed by the needle selection device. Obviously, the needle selection device with a large "lifting knife tolerance" is conducive to the operation of the jacquard machine. The present invention is provided with a retaining section of the convex edge, so that within a relatively wide range, the elastic armature hook can be kept in a smaller dynamic magnetic gap, and when the coil of the electromagnet is energized, the elastic armature hook can be smoothly attracted to the closed magnetic circuit position, thereby realizing the state conversion of the vertical hook from "hanging" to "taking off", widening the "lifting knife tolerance". This is an important tolerance margin, which reduces the accuracy requirements of the needle selection device on the jacquard machine's knife position and improves the reliability of the jacquard machine's overall motion switching.

[0067] Preferably, a section of limiting convex edge 405 is provided along the edge of the middle and lower part of the inner side of the rod-shaped body 401 for engaging with the linear vertical hook guide rail 6 and ensuring that the vertical hook 4 does not produce lateral displacement, and the top of the limiting convex edge 405 is connected in a parallel straight line with the bottom end of the convex edge holding section 404b to achieve full-range linear displacement of the vertical hook 4. Since the vertical hook 4 is arranged in the linear vertical hook guide rail 6 of the substrate 1, the vertical hook 4 needs to have a rod-shaped body 401 that cooperates with it to ensure that the vertical hook 4 does not have lateral displacement when it moves up and down in the linear vertical hook guide rail 6. Since the dynamic magnetic gap is generated by the convex edge, it has certain precision requirements. Therefore, in order to ensure precision, it is necessary to ensure that the motion trajectory of the vertical hook 4 is stable, and ensure that there is no other lateral displacement when the vertical hook 4 moves up and down, otherwise the size of the dynamic magnetic gap cannot be controlled.

[0068] Preferably, at least one shock-absorbing groove 406 for blocking the vibration of the knife lifting is provided between the side ear portion 402 and the rod-shaped body 401 to prevent the vibration of the knife lifting from being transmitted to the top hook portion 403 through the side ear portion 402, thereby improving the reliability of the operation.

[0069] Example 2

[0070] The present invention provides a needle selection device assembly, which is formed by sequentially stacking and assembling a plurality of needle selection devices with elastic armature hooks disclosed in Embodiment 1. For example, 16 needle selection devices with elastic armature hooks disclosed in Embodiment 1 can be sequentially stacked and assembled into a 16-needle needle selection device assembly.

[0071] Example 3

[0072] See also Figure 5 and Figure 6 As shown, based on the structure of the needle selection device with elastic armature hook provided in Example 1, the present invention further provides a high-density needle selection device. The high-density needle selection device comprises a substrate 1, a sealing plate 8, and a group of elastic armature hooks 2, electromagnets 3, vertical hooks 4 and pulley blocks arranged on the front side of the substrate 1 (not shown) and another group of elastic armature hooks 2, electromagnets 3, vertical hooks 4 and pulley blocks (not shown) arranged on the back side of the substrate 1.

[0073] The structure and installation method of the group of elastic armature hooks 2, electromagnets 3, vertical hooks 4 and pulley blocks located at the front are the same as those in the first embodiment.

[0074] The structure of the electromagnet 3 located at the back is the same as that of the electromagnet 3 located at the front, except that the electromagnet 3 located at the back is located below the electromagnet 3 located at the front, thereby forming an upper and lower overlapping relationship.

[0075] The structure of the elastic armature hook 2 at the back is slightly different from that of the elastic armature hook 2 at the front. The difference is that since the electromagnet 3 at the back is located at the bottom, in order not to interfere with the movement of the vertical hook 4 at the front, the elastic armature hook mounting block 5 at the back needs to be designed in the middle of the substrate 1, so the mounting and fixing structure 204 of the elastic armature hook 2 at the back is an upwardly inclined L-shaped structure, and the shape of the elastic armature hook fixing groove 7 on the elastic armature hook mounting block 5 at the back is consistent with the shape of the L-shaped mounting and fixing structure 204 of the elastic armature hook 2 at the back. The installation method of the elastic armature hook 2 at the back is also different from that of the elastic armature hook 2 at the front. The difference is that since the electromagnet 3 at the back is at the bottom and the electromagnet 3 at the front is at the top, the elastic armature hook 2 at the back is located below the elastic armature hook 2 at the front, thereby forming an upper and lower overlapping relationship. Therefore, the elastic armature hook 2 located at the front is called the upper elastic armature hook 2 - 1 , and the elastic armature hook 2 located at the back is called the upper elastic armature hook 2 - 2 .

[0076] The structure of the vertical hook 4 located on the back is slightly different from that of the vertical hook 4 located on the front. The difference is that since the electromagnet 3 located on the back is at the bottom and the electromagnet 3 located on the front is at the top, in order to achieve the hook position with equal heights at the front and back, the vertical hook 4 located on the front needs to have a longer convex edge than the vertical hook 4 located on the back. Therefore, the vertical hook 4 located on the front is a long vertical hook 4-1 with a longer rod-shaped body 401, and the vertical hook 4 located on the back is a short vertical hook 4-2 with a shorter rod-shaped body 401.

[0077] The structure and installation method of the vertical hook 4 located at the back are the same as those of the vertical hook 4 located at the front.

[0078] The sealing plate 8 can be disposed on the front side of the substrate 1 or on the back side of the substrate 1 .

[0079] Through the above improvements, two pairs of vertical hooks 4 can be arranged in the space of one substrate 1, thereby increasing the density of the needle selection device.

[0080] It should be noted that the pulley assembly required by the high-density needle selection device of this embodiment can also have two schemes, one is a parallel thin pulley block scheme, that is, the thickness of the pulley block is thinned to 2-2.4mm, and the thickness of the two sets of parallel pulley blocks is equal to the original pulley block; the other scheme is a double-layer pulley block structure stacked up and down, which can also be adapted to high-density electromagnets and corresponding vertical hook structures. Because it is not the key innovation of the present invention, it will not be repeated here.

[0081] Example 4

[0082] See also Figure 7 As shown, the present invention provides a high-density needle selection device assembly, which is formed by sequentially stacking and assembling a plurality of high-density needle selection devices disclosed in Example 3. For example, 8 high-density needle selection devices disclosed in Example 3 can be sequentially stacked and assembled into a 16-needle high-density needle selection device assembly.

[0083] It should be noted that the technical solution of the present invention is not limited to the production of 16-needle high-density needle selection device components, and can also be used to produce higher-density needle selection device components.

[0084] Example 5

[0085] The present invention also provides a high-density electronic jacquard machine, which is equipped with the needle selection device assembly disclosed in Example 2, or is equipped with the high-density needle selection device assembly disclosed in Example 4.

[0086] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A needle selection device with an elastic armature hook, characterized in that: The invention comprises a substrate (1) and a group of elastic armature hooks (2), an electromagnet (3), a vertical hook (4) and a pulley block arranged on the substrate (1); the electromagnet (3) is fixedly mounted at the top middle portion of the front face of the substrate (1), and the electromagnet (3) is made of an I-shaped iron core and a coil; the elastic armature hooks (2) are provided with two pieces, which are deformably arranged on the left and right sides of the electromagnet (3) through elastic armature hook mounting blocks (5) located on the substrate (1); the vertical hooks (4) are provided with a plurality of springs, each of which is ... There are two linear vertical hook guide rails (6) which are respectively slidably mounted up and down on both sides of the substrate (1), the vertical hooks (4) are vertical hooks with convex edges, and the two vertical hooks (4) are located outside the two elastic armature hooks (2); the pulley block is slidably arranged up and down in the pulley block slide groove in the middle of the substrate (1), the pulley block is connected to the bottom ends of the two vertical hooks (4) through the upper pulley line, and the pulley block is connected to the head line joint located below the substrate (1) through the lower pulley line; The elastic armature hook (2) can generate elastic bending deformation toward the I-shaped iron core under the pushing action of the convex edge of the vertical hook (4), so that the elastic armature hook (2) can contact the long magnetic pole and the short magnetic pole of the I-shaped iron core simultaneously when the coil is energized to form a closed magnetic circuit; the elastic armature hook (2) can also generate elastic straight recovery away from the I-shaped iron core when the convex edge of the vertical hook (4) cancels the pushing action, so that the elastic armature hook (2) is separated from the short magnetic pole of the I-shaped iron core when the coil is not energized to hook the vertical hook (4) on the corresponding side; the vertical hook (4) realizes the hanging state and the unhooking state of the jacquard device by cooperating with the elastic armature hook (2).

2. The needle selection device with elastic armature hook according to claim 1, characterized in that: The elastic armature hook (2) is a whole formed by firmly combining a magnetic rod portion (201), an elastic rod portion (202) and a hook tip portion (203); The main body of the elastic rod (202) is an elastically deformable component; the magnetic conductive rod (201) is fixedly attached to the inner surface of the main body of the elastic rod (202), and can be deformed and restored together with the main body of the elastic rod (202), and is used to cooperate with the long and short magnetic poles of the I-shaped iron core to form a closed magnetic circuit; the hook tip (203) is fixedly installed on the outer side of the bottom end of the main body of the elastic rod (202), and the shape of the hook tip (203) matches the shape of the vertical hook (4), and is used to cooperate with the vertical hook (4) to realize the hanging state and the unhooking state of the jacquard device; A mounting and fixing structure (204) for fixedly connecting with the elastic armature hook mounting block (5) extends from the top of the main body of the elastic rod portion (202); under the cooperation of the mounting and fixing structure (204) and the elastic armature hook mounting block (5), the upper end of the inner side surface of the magnetic conductive rod portion (201) is always in close contact with the long magnetic pole of the I-shaped iron core; When the convex edge of the vertical hook (4) does not exert a pushing effect on the hook tip (203), the main body of the elastic rod (202) remains in a vertical natural state, and a magnetic gap exists between the lower end of the inner side surface of the magnetic conductive rod (201) and the short magnetic pole of the I-shaped iron core. At this time, the hook tip (203) is connected to the vertical hook (4); When the convex edge of the vertical hook (4) exerts a pushing effect on the hook tip (203), the main body of the elastic rod (202) is elastically bent and deformed toward the I-shaped iron core, and the lower end of the inner side surface of the magnetic conductive rod (201) approaches the short magnetic pole of the I-shaped iron core so that the I-shaped iron core attracts it to a closed magnetic circuit position.

3. The needle selection device with elastic armature hook according to claim 2, characterized in that: The elastic rod (202) is made of an elastic material, and the elastic material is a metal or non-metal material including a copper sheet, a steel sheet, or a nylon sheet; The magnetic conductive rod portion (201) is made of a soft magnetic material, which is a soft magnetic sheet with soft magnetic properties, and is combined with the elastic rod portion (202) by means of an adhesive bonding or thermal bonding process, and can be bent and deformed along with the elastic rod portion (202); The hook tip (203) is made of a wear-resistant material, which is a metal or non-metal material, and the vertical hook (4) and the hook tip (203) are made of the same wear-resistant material.

4. The needle selection device with elastic armature hook according to claim 2, characterized in that: An end reinforcement structure (205) for fixedly connecting with the hook tip (203) extends from the bottom of the main body of the elastic rod (202); the end reinforcement structure (205) is an upwardly inclined F-shaped structure; the hook tip (203) is fixedly mounted on the outer side of the bottom end of the elastic rod (202) through good engagement with the end reinforcement structure (205).

5. The needle selection device with elastic armature hook according to claim 2, characterized in that: Two elastic armature hook fixing grooves (7) are arranged on the elastic armature hook mounting block (5), and the two elastic armature hooks (2) are respectively embedded in the elastic armature hook fixing grooves (7) on the corresponding sides through their respective mounting and fixing structures (204) to achieve positioning, mounting and fixing with the substrate (1), and when the jacquard device is in a hanging state, the pulling force of the vertical hook (4) is transmitted to the substrate (1) through the elastic armature hook (2), and finally transmitted to the jacquard device frame fixing the substrate (1).

6. The needle selection device with elastic armature hook according to claim 5, characterized in that: According to different arrangement positions of the elastic armature hook mounting block (5) on the substrate (1), the mounting and fixing structure (204) has the following two forms; When the elastic armature hook mounting block (5) is located outside the linear vertical hook guide rail (6), the mounting fixing structure (204) is in a U-shaped structure that bends downward; When the elastic armature hook mounting block (5) is located on the inner side of the linear vertical hook guide rail (6), the mounting and fixing structure (204) is an upwardly inclined L-shaped structure.

7. The needle selection device with elastic armature hook according to claim 1, characterized in that: The vertical hook (4) comprises a rod-shaped body (401), a side ear (402) for hooking with the blade of a knife is arranged in the middle of the outer side of the rod-shaped body (401), a top hook (403) is arranged at the top end of the inner side of the rod-shaped body (401), and the hook tip of the top hook (403) is close to the inner edge of the rod-shaped body (401), and the hook bottom of the top hook (403) is close to the axis of the rod-shaped body (401); A convex edge is provided at the upper edge of the inner side of the rod-shaped body (401) and below the top hook portion (403), and the convex edge protrudes laterally from the hook tip of the top hook portion (403); the contour curve of the convex edge is divided into a push section (404a) located at the upper section and a retaining section (404b) located at the lower section, the push section (404a) is an inclined curve starting from the bottom of the hook of the top hook portion (403), the push section (404a) can generate a lateral push on the elastic armature hook (2) in contact with the vertical hook (4) at the initial stage of vertical upward movement, and the retaining section (404b) is a curve that is in contact with the vertical hook (4). The straight line is parallel to the moving direction of the rod-shaped body (401), the holding section (404b) is smoothly connected with the pushing section (404a), and the holding section (404b) can exert a holding force on the elastic armature hook (2) in contact with it to maintain lateral pushing in the middle and late stages of the vertical upward movement of the vertical hook (4); the distance from the bottom of the holding section (404b) to the bottom of the top hook part (403) is greater than the distance from the hook tip of the top hook part (403) to the bottom of the top hook part (403); the length of the holding section (404b) of the convex edge corresponds to the tolerance range of the jacquard machine knife lifting height allowed by the needle selection device to which it belongs; A limiting convex edge (405) is provided along the edge of the middle and lower part of the inner side of the rod-shaped body (401) for engaging with the linear vertical hook guide rail (6) and ensuring that the vertical hook (4) does not produce lateral displacement, and the top end of the limiting convex edge (405) is connected in a parallel straight line to the bottom end of the convex edge retaining section (404b) to achieve full-range linear displacement of the vertical hook (4); At least one shock-absorbing groove (406) for blocking the vibration of lifting the knife is provided between the side ear portion (402) and the rod-shaped body (401).

8. The needle selection device with elastic armature hook according to claim 1, characterized in that: A high-density needle selection device is also formed by a sealing plate (8) and another group of the elastic armature hook (2), the electromagnet (3), the vertical hook (4) and the pulley group; Wherein, one group of the elastic armature hook (2), the electromagnet (3), the vertical hook (4) and the pulley block is arranged on the front side of the substrate (1), and another group of the elastic armature hook (2), the electromagnet (3), the vertical hook (4) and the pulley block is arranged on the back side of the substrate (1); the sealing plate (8) is covered on the front side or the back side of the substrate (1); the electromagnet (3) located on the front side and the electromagnet (3) located on the back side are in an up-down stacking relationship; the elastic armature hook (2) located on the front side and the elastic armature hook (2) located on the back side are also in an up-down stacking relationship; the length of the vertical hook (4) located on the front side is longer than the length of the vertical hook (4) located on the back side, that is, the vertical hook (4) located on the front side is a long vertical hook, and the vertical hook (4) located on the back side is a short vertical hook.

9. A needle selection device assembly, characterized in that: The needle selection device is composed of a plurality of needle selection devices with elastic armature hooks as described in any one of claims 1 to 8 stacked and assembled in sequence.

10. An electronic jacquard machine, characterized in that: Equipped with a needle selection device with an elastic armature hook as described in any one of claims 1 to 8 or a needle selection device assembly as described in claim 9.

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