High-density needle selection device based on double-layer pulley block trough plate and assembly of high-density needle selection device

Abstract

The high-density needle selection device comprises the double-layer pulley block groove plate provided with an upper pulley assembly functional layer and a lower pulley assembly functional layer, and the double-layer pulley block groove plate is internally provided with vertically-stacked pulley blocks and two pairs of vertically-designed vertical hooks corresponding to the vertically-stacked pulley blocks. The double magnets are stacked up and down, and the two pairs of armature hooks are different in design and correspond to the double magnets. An upper pulley assembly functional layer and a lower pulley assembly functional layer are designed in the double-layer pulley block trough plate, so that the two pulley blocks are accommodated under the condition that the thickness of the trough plate is not increased; different armature hook designs of the upper and lower electromagnets enable the front and rear surfaces of the spacer to adopt vertical hooks with the same shape; the shaft hole part of the armature hook is rotatably connected with the spacer, and the rotating shaft is outside a closed magnetic circuit of the electromagnet, so that the magnetic circuit is not influenced and is not influenced by the magnetic circuit. The needle selection device is compact in overall structure and good in leakproofness, the electromagnet is small in size and low in power consumption, and two sets of needle selection devices of the double-position double-acting jacquard machine can be contained in one unit.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic jacquard machines of textile machinery, and in particular relates to a high-density needle selection device based on a double-layer pulley block groove plate and a component thereof. 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 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.

[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 through a pulley block. The double-action type has little damage to the warp yarn and is conducive to weaving. Currently, most electronic jacquard machines are double-action type. The needle selection device produced in large quantities commercially often makes 8 electromagnets and corresponding mechanisms into a combination for easy installation and maintenance.

[0005] The double-action needle selection device has a complex mechanism and many parts, and it is bound to occupy a certain space to be realized. The needle selection device is arranged in a dense matrix in the electronic jacquard machine to form a needle box, and several needle boxes constitute the electronic jacquard machine. The volume of the needle selection device directly affects the volume of the electronic jacquard machine, affects the length of the knife lifting, and affects the design of the mechanism that drives the knife lifting movement. The present application proposes a concept of needle lifting density, which is defined as the number of needle lifting per unit area (the area is the projected surface area orthogonal to the needle lifting). Then the needle lifting density of the needle selection device is: the ratio of the number of needle lifting of the needle selection device to its projected area; the needle lifting density of the jacquard machine is: the ratio of the number of needle lifting of the jacquard machine to its projected area. Obviously, jacquard machines with the same number of needles have smaller volumes with higher densities.

[0006] At present, a needle selection device is widely used in the market, and its needle density is 8 needles corresponding to 4×3.5cm 2 , about 5714 needles per square meter, 0.57 needles per square centimeter. When using this needle selection device to make a jacquard machine, the projection area of ​​a 5120-needle faucet is close to 1 square meter, and a 10,000-needle faucet is 2 square meters. It is difficult to make a faucet with a larger number of needles mechanically. It is also difficult to assemble such a huge machine in coordination with the loom. This is the bottleneck that restricts the development of jacquard machines with large needle counts. If there is a high-density needle selection device, such as doubling the needle density of the needle selection device, it is possible to make 10,000 or even more than 10,000 needle faucets.

[0007] The Chinese invention application "yarn selection device, double shed weaving system and loom equipped with the weaving system", patent number 98116491.9 (hereinafter referred to as prior patent 1), and the European patent application "three-position opening jacquard machine", application number: 0723041 (hereinafter referred to as prior patent 2), both use two electromagnet solutions stacked up and down. Among them, the solution of prior patent 2 requires the jacquard machine to have two sets of upper and lower lifting knives, and there are problems with the large size and power consumption of the electromagnets, which is not compact enough. Prior patent 1 proposes a solution of using two electromagnets to control the "hook pair", where the "hook" corresponds to the "vertical hook" in the needle selection device, and the "hook pair" is a "pair" composed of two related hooks. The solution of prior patent 1 cannot directly produce a three-position opening, and the three-position opening can only be produced through the action of the complex pulley group connected to the "hook pair". Since the "hook pair" is two hooks moving in association, which is different from two independently moving vertical hooks, the solution in prior patent 1 cannot replace the two independent vertical hooks to increase the needle lifting density of the two-position needle selection device, nor can it derive a high-density solution. Summary of the invention

[0008] In order to make up for the deficiencies of the above-mentioned prior art, the present invention provides a high-density needle selection device based on a double-layer pulley block groove plate and its components.

[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 high-density needle selection device based on a double-layer pulley block slot plate, comprising a double-layer pulley block slot plate, wherein the front and rear interlayers in the double-layer pulley block slot plate are respectively an upper pulley assembly functional layer and a lower pulley assembly functional layer; the upper pulley block functional layer is divided into fully linear upper pulley block vertical hook slot section, upper pulley block upper pulley line slot section, upper pulley block pulley slot section, and upper pulley block lower pulley line slot section functional sections from top to bottom; the lower pulley block functional layer is divided into fully linear lower pulley block vertical hook slot section, lower pulley block upper pulley line slot section, lower pulley block pulley slot section, and lower pulley block lower pulley line slot section functional sections from top to bottom;

[0011] A pair of corresponding vertical hooks are respectively arranged in the upper pulley block vertical hook slide slot section and the lower pulley block vertical hook slide slot section; a corresponding group of pulley blocks are respectively arranged in the upper pulley block pulley slide slot section and the lower pulley block pulley slide slot section, and the two groups of pulley blocks are stacked in an up-and-down staggered manner on the front and back sides of the double-layer pulley block groove plate; the two pairs of vertical hooks respectively drive their corresponding group of pulley blocks to slide up and down through the upper pulley line;

[0012] A spacer is provided on the top of the double-layer pulley group groove plate, and two electromagnets stacked up and down are provided on the spacer through the electromagnet skeleton, and the two electromagnets have two intersecting magnetic pole surfaces above and below; a pair of armature hooks for cooperating with a pair of vertical hooks on the same side are respectively provided on the left and right sides of the two electromagnets, and the two pairs of armature hooks are designed differently and are respectively located on the inner sides of the pair of vertical hooks on the same side, and the axial hole parts of the two pairs of armature hooks are respectively rotatably connected to the front and rear sides of the spacer through a pair of rotating shafts provided on the spacer, and the rear sides of the hook tips of the two pairs of armature hooks are elastically connected to the left and right sides of the electromagnet skeleton through a pair of springs, respectively, and the intersecting magnetic pole surfaces of the two electromagnets respectively cooperate with the two side surfaces of the corresponding pair of armature hooks to form a closed magnetic circuit, and the two pairs of rotating shafts are respectively located outside the two closed magnetic circuits, and the hook tips and magnetic pole parts of the armature hooks are on the same side of the rotating shaft.

[0013] Further, the double-layer pulley block groove plate includes a second substrate, a first substrate, and a second substrate that are sequentially assembled from front to back, or a first substrate, a second substrate, and a first substrate that are sequentially assembled from front to back;

[0014] The groove shape of the rear side surface of the second substrate is combined with the groove shape of the front side surface of the first substrate to form the upper pulley assembly functional layer; the groove shape of the rear side surface of the first substrate is combined with the groove shape of the front side surface of the second substrate to form the lower pulley assembly functional layer;

[0015] The upper pulley assembly functional layer and the lower pulley assembly functional layer are overlapped front and back relative to the first substrate or the second substrate located in the middle, and the upper pulley block vertical hook slide groove section and the lower pulley block vertical hook slide groove section correspond in position front and back and have the same thickness; the upper pulley block pulley slide groove section corresponds in position front and back to the upper pulley line groove section of the lower pulley block, and the thickest pulley block bracket section of the upper pulley block pulley slide groove section is located at the center of the double-layer pulley block groove plate, and the upper pulley line groove sections of the lower pulley block are located on both sides of the double-layer pulley block groove plate. , they can be nested without conflict in space; the lower pulley line groove section of the upper pulley block corresponds to the position of the lower pulley block pulley groove section in front and back, and the lower pulley line groove section of the upper pulley block is located on both sides of the double-layer pulley block groove plate, and does not conflict with the pulley block bracket section of the lower pulley block pulley groove section located at the center of the double-layer pulley block groove plate; the upper pulley block pulley groove section and the lower pulley block pulley groove section are designed in an up and down staggered and stacked manner on the front and back sides, and the upper pulley block pulley groove section and the lower pulley block pulley groove section have the same thickness.

[0016] Furthermore, the first substrate and the second substrate are both plastic parts that are injection-molded in one step, and the front and rear surfaces of the first substrate and the second substrate are respectively provided with buckles, and the rear side surface of the second substrate and the front side surface of the first substrate are superimposed and spliced ​​through the corresponding buckles, and the rear side surface of the first substrate and the front side surface of the second substrate are superimposed and spliced ​​through the corresponding buckles; and, the lower side end surface of the first substrate and the lower side end surface of the second substrate are respectively provided with positioning notches for judging whether the splicing of the two is correct, and when the first substrate and the second substrate are spliced ​​facing each other with the correct side groove type, the positioning notch on the first substrate is left-right fitted with the positioning notch on the second substrate.

[0017] Furthermore, when the second substrate, the first substrate, and the second substrate are assembled, the first substrate in the middle is used as the central substrate. At this time, the spacer, the electromagnet frame, and the two electromagnets stacked up and down are arranged on the top of the first substrate, and the tops of the two second substrates on both sides are respectively provided with heat sinks corresponding to the positions of the electromagnets respectively.

[0018] Furthermore, when the first substrate, the second substrate, and the first substrate are assembled, the second substrate in the middle is used as the central substrate. At this time, the spacer, the electromagnet frame, and the two electromagnets stacked up and down are arranged on the top of the second substrate, and the tops of the two first substrates on both sides are respectively provided with heat sinks corresponding to the positions of the electromagnets respectively.

[0019] The heat sink is used to dissipate heat for the coil of the electromagnet and play an electromagnetic shielding role. The heat sink is made of non-magnetic metal material, and at least one surface of the heat sink is exposed to the outside and in good contact with the metal body to conduct heat and electricity to the outside.

[0020] Further, the groove types of the front side of the first substrate are, from top to bottom, the first half side groove of the upper pulley block vertical hook, the first half side groove of the upper pulley line of the upper pulley block, the first half side groove of the pulley of the upper pulley block, and the first half side groove of the lower pulley line of the upper pulley block; the groove types of the rear side of the second substrate are, from top to bottom, the second half side groove of the upper pulley block vertical hook, the second half side groove of the upper pulley line of the upper pulley block, the second half side groove of the pulley of the upper pulley block, and the second half side groove of the lower pulley line of the upper pulley block;

[0021] When the rear side surface of the second substrate is spliced ​​left and right with the front side surface of the first substrate, the second half-side slide groove of the vertical hook of the upper pulley block and the first half-side slide groove of the vertical hook of the upper pulley block are spliced ​​front and back to form the vertical hook slide groove section of the upper pulley block, the second half-side line groove of the upper pulley line of the upper pulley block and the first half-side line groove of the upper pulley line of the upper pulley block are spliced ​​front and back to form the upper pulley line line groove section of the upper pulley block, the second half-side line groove of the pulley of the upper pulley block and the first half-side line groove of the pulley of the upper pulley block are spliced ​​front and back to form the lower pulley line line groove section of the upper pulley block.

[0022] Further, the groove types of the rear side surface of the first substrate are, from top to bottom, the first half side groove of the vertical hook of the lower pulley group, the first half side groove of the upper pulley line of the lower pulley group, the first half side groove of the pulley of the lower pulley group, and the first half side groove of the lower pulley line of the lower pulley group; the groove types of the front side surface of the second substrate are, from top to bottom, the second half side groove of the vertical hook of the lower pulley group, the second half side groove of the upper pulley line of the lower pulley group, the second half side groove of the pulley of the lower pulley group, and the second half side groove of the lower pulley line of the lower pulley group;

[0023] When the rear side surface of the first substrate and the front side surface of the second substrate are spliced ​​left and right, the first half side slide groove of the vertical hook of the lower pulley group and the second half side slide groove of the vertical hook of the lower pulley group are spliced ​​front and back to form the vertical hook slide groove section of the lower pulley group, the first half side line groove of the upper pulley line of the lower pulley group and the second half side groove of the upper pulley line of the lower pulley group are spliced ​​front and back to form the line groove section of the upper pulley line of the lower pulley group, the first half side slide groove of the pulley of the lower pulley group and the second half side groove of the pulley of the lower pulley group are spliced ​​front and back to form the line groove section of the lower pulley line of the lower pulley group.

[0024] Furthermore, the two pairs of vertical hooks are respectively a pair of first vertical hooks and a pair of second vertical hooks with the same structure; the two pulley blocks are respectively an upper pulley block and a lower pulley block with the same structure; the two electromagnets stacked up and down are respectively an upper electromagnet and a lower electromagnet with symmetrical structures; the two pairs of armature hooks are respectively an upper armature hook and a lower armature hook with different structures; the two pairs of springs are respectively a pair of first springs and a pair of second springs with the same structure; the two pairs of rotating shafts are respectively a first rotating shaft and a second rotating shaft with the same structure;

[0025] The specific structure in the functional layer of the upper pulley assembly is that a pair of first vertical hooks can be slidably arranged on the left and right sides of the vertical hook slide groove section of the upper pulley group respectively, and the upper pulley group can be slidably arranged up and down in the pulley slide groove section of the upper pulley group, and a pair of first vertical hooks are connected with the upper pulley of the upper pulley group through the pulley line located in the upper pulley line groove section of the upper pulley group, and the lower pulley of the upper pulley group is connected with the first first line joint through the pulley line located in the lower pulley line groove section of the upper pulley group; the first vertical hook drives the upper pulley group to rise and fall in the pulley slide groove section of the upper pulley group as the knife is lifted; the upper electromagnet is fixedly installed on the upper end of the electromagnet skeleton, and a pair of upper armature hooks are respectively located on the left and right sides of the upper electromagnet, and a pair of upper armature hooks are located on the inner sides of a pair of first vertical hooks, and a pair of axial hole portions of the upper armature hooks are connected through corresponding A pair of first rotating shafts are rotatably connected with corresponding points on the front side of the partition, and the rear sides of the hook tips of a pair of upper armature hooks are elastically connected with corresponding points on the left and right sides of the upper part of the electromagnet skeleton through a pair of first springs respectively, and the intersecting magnetic pole surfaces of the upper electromagnet respectively cooperate with the two side surfaces of a pair of upper armature hooks to form a corresponding front closed magnetic circuit, and the two first rotating shafts are both located outside the front closed magnetic circuit, and the hook tip and the magnetic pole part of the upper armature hook are on the same side of the first rotating shaft; when the upper electromagnet is energized, the upper armature hook remains in the front closed magnetic circuit position, and the hook tip of the upper armature hook does not contact the hook tip of the first vertical hook, and is in a dehooking state; when the upper electromagnet is not energized, the upper armature hook moves in the direction away from the magnetic pole of the upper electromagnet under the action of the first spring, and the hook tip of the upper armature hook hooks the hook tip of the first vertical hook in a pulling manner, and is in a hooking state;

[0026] The specific structure in the functional layer of the lower pulley assembly is that a pair of second vertical hooks are respectively arranged on the left and right sides of the vertical hook slide groove section of the lower pulley group, and the lower pulley group can be slidably arranged up and down in the pulley slide groove section of the lower pulley group, and a pair of second vertical hooks are connected with the upper pulley of the lower pulley group through the pulley line located in the upper pulley line groove section of the lower pulley group and the lower pulley of the lower pulley group is connected with the second first line joint through the pulley line located in the lower pulley line groove section of the lower pulley group; the second vertical hook drives the lower pulley group to rise and fall in the pulley slide groove section of the lower pulley group as the knife is lifted. The lower electromagnet is fixedly installed at the lower end of the electromagnet skeleton, and a pair of lower armature hooks are respectively located on the left and right sides of the lower electromagnet, and a pair of lower armature hooks are located on the inner sides of a pair of second vertical hooks, and the axial hole parts of a pair of lower armature hooks are connected by corresponding A pair of second rotating shafts are rotatably connected with corresponding points on the rear side of the partition, and the rear sides of the hook tips of a pair of lower armature hooks are elastically connected to corresponding points on the left and right sides of the lower part of the electromagnet skeleton through a pair of second springs, respectively. The intersecting magnetic pole surfaces of the lower electromagnet respectively cooperate with the two side surfaces of a pair of lower armature hooks to form a corresponding back closed magnetic circuit, and the two second rotating shafts are both located outside the back closed magnetic circuit, and the hook tip and the magnetic pole part of the lower armature hook are on the same side of the second rotating shaft; when the lower electromagnet is energized, the lower armature hook remains in the back closed magnetic circuit position, and the hook tip of the lower armature hook does not contact the hook tip of the second vertical hook, and is in a decoupled state; when the lower electromagnet is not energized, the lower armature hook moves in the direction away from the magnetic pole of the lower electromagnet under the action of the second spring, and the hook tip of the lower armature hook hooks the hook tip of the second vertical hook in a lifting manner, and is in a hooked state.

[0027] 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 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 for laterally pushing the armature hook on the corresponding side and maintaining its position 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 holding section located in the lower section, and the pushing section is an inclined curve starting from the hook bottom of the top hook portion. line, the holding section is a straight line parallel to the moving direction of the rod-shaped body, and the pushing section is smoothly connected with the holding section; the distance from the bottom of the holding section to the bottom of the top hook portion is greater than the distance from the hook tip of the top hook portion to the bottom of the top hook portion; 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; the middle and lower parts of the inner side of the rod-shaped body are provided along their edges with a limiting convex edge for engaging with the 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; 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.

[0028] Further, the armature hook comprises a straight rod portion, a magnetic pole surface sliding contact portion, a magnetic pole surface suction contact portion, an axial hole portion, a hook tip portion and a spring positioning column, the cross section of the straight rod portion is rectangular, the axial hole portion is arranged at one end of the straight rod portion through the magnetic pole surface sliding contact portion, the hook tip portion is arranged at the other end of the straight rod portion through the magnetic pole surface suction contact portion, and the spring positioning column is arranged on the side wall of the straight rod portion facing the electromagnet side;

[0029] The electromagnet is formed by winding enameled wire around the outside of an I-shaped iron core, a cross beam at one end of the I-shaped iron core is a long magnetic pole, and a cross beam at the other end of the I-shaped iron core is a short magnetic pole; the left and right ends of the long magnetic pole have a first bent portion bent backward, and the left and right ends of the short magnetic pole have a second bent portion bent forward, the first bent portion and the second bent portion are in a front-to-back misaligned form, and the misalignment amplitude is equal to the thickness of the straight rod portion; the concave surface of the first bent portion serves as a sliding magnetic pole surface, and the side end surface of the second bent portion serves as an attraction magnetic pole surface, and the sliding magnetic pole surface and the attraction magnetic pole surface located on the same side constitute two intersecting magnetic pole surfaces; a magnetic conductive plastic upper cover is provided in front of the sliding magnetic pole surface, and there is a spacing between the magnetic conductive plastic upper cover and the sliding magnetic pole surface to form a groove for facilitating the embedding of the straight rod portion, and a magnetic conductive elastic member for contacting the straight rod portion is provided in the groove;

[0030] After assembly, the shaft hole portion is rotatably mounted on the rotating shaft, one end of the spring is fixed on the spring positioning column, and the other end of the spring is fixedly connected to the corresponding point on the side wall of the electromagnet skeleton; the magnetic pole surface sliding contact portion is tightly embedded in the groove formed by the sliding magnetic pole surface, the magnetic plastic upper cover and the magnetic elastic member, and the magnetic pole surface suction contact portion is laterally aligned with the suction magnetic pole surface; when the magnetic pole surface suction contact portion is in contact with the suction magnetic pole surface, the three sides of the magnetic pole surface sliding contact portion are respectively in contact with the sliding magnetic pole surface, the magnetic plastic upper cover and the magnetic elastic member, so that the sliding magnetic pole surface, the magnetic pole surface sliding contact portion, the straight rod portion, the magnetic pole surface suction contact portion and the suction magnetic pole surface constitute the closed magnetic circuit; the shaft hole portion is located outside the closed magnetic circuit and does not participate in the magnetic conductive path of the closed magnetic circuit; the matching points of the two pairs of armature hooks and the corresponding pair of vertical hooks are at the same position height.

[0031] Furthermore, the pulley block includes two mounting plates, two pulleys, two ball bearings, two pulley shafts, a bracket pressing protrusion and a bracket pressing hole; the two pulleys are respectively arranged at the upper and lower ends of a pulley bracket formed by splicing two mounting plates through their respective corresponding pairs of ball bearings and the pulley shafts; the widths of the two mounting plates are smaller than the diameters of the pulleys; the thicknesses of the two mounting plates are equal, so as to serve as positioning sliders when the pulley block moves in the pulley groove section of the upper pulley block or the pulley groove section of the lower pulley block.

[0032] Furthermore, a printed circuit board slot is provided at the top of the electromagnet skeleton, and metal springs for connecting the coil leads of the electromagnet are provided on both sides of the printed circuit board slot. Coil lead grooves, a first spring mounting hole and a second spring mounting hole are provided on the left and right sides of the electromagnet skeleton.

[0033] A high-density needle selection device assembly is a 16-needle high-density needle selection device assembly formed by stacking 8 of the above-mentioned high-density needle selection devices based on double-layer pulley block groove plates.

[0034] 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.

[0035] The present invention also discloses an electronic jacquard machine, which is equipped with the high-density needle selection device assembly disclosed above.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention optimizes and improves the pulley block groove plate, and realizes that two sets of pulley assemblies stacked up and down are installed in the double pulley block groove plate while keeping the thickness of the existing pulley block unchanged, thereby improving the installation density of the pulley assembly. Compared with the existing open jacquard machine pulley block, the double pulley block groove plate of the present invention has a compact structure and good airtightness, can minimize the influence of flower hair and dust on the pulley assembly, has a long service life, is easy to install, simple to maintain, and is suitable for mass production.

[0038] 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 the 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 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, which 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. The vertical hook is provided with one or more shock-absorbing grooves between the side ears and the rod to prevent the vibration of lifting the knife from being transmitted to the hook tip through the side ears, which can also improve the reliability of the action.

[0039] The present invention optimizes and improves the magnetic circuit structure. The electromagnet of the present invention eliminates the large magnetic resistance caused by the "rotating shaft magnetic gap" in the prior art, and improves the efficiency of the electromagnet. The electromagnet of the present invention has few factors affecting the magnetic resistance of the circuit, which is convenient for quality control in mass production. The rotating shaft of the electromagnet of the present invention is not on the closed magnetic circuit, and the resistance of the rotating shaft movement is irrelevant to the electromagnetic force, and the rotating shaft does not have to bear the heavy responsibility of controlling the precision of the magnetic gap, so that a loose design can be adopted to improve the flexibility of the rotating shaft. The length of the armature hook of the electromagnet of the present invention is shortened and the weight is reduced, so that the overall structure of the needle selection device using the electromagnet is compact. The armature of the electromagnet of the present invention contacts the side of the I-shaped iron core cross beam, and under the action of the electromagnetic force, the armature and the magnetic pole part 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 low coil temperature. The mechanical deformation of the parts of the needle selection device affected by the temperature rise is reduced, and the tolerance margin to the power supply voltage and the ambient temperature is improved, and the reliability of the action and control is improved.

[0040] The high-density needle selection device of the present invention has a compact overall structure, a reasonable magnetic circuit design, a small electromagnet volume, low power consumption, reliable operation, and two independent vertical hooks are used to increase the needle selection 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.

[0041] 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

[0042] 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:

[0043] Figure 1 An exploded view of an embodiment of a high-density needle selection device of the present invention;

[0044] Figure 2 An exploded view of another embodiment of the high-density needle selection device of the present invention;

[0045] Figure 3 Schematic diagrams of two side groove structures of the first substrate of the high-density needle selection device of the present invention, wherein the left figure is a schematic diagram of the front side groove structure, and the right figure is a schematic diagram of the rear side groove structure;

[0046] Figure 4 Schematic diagrams of two side groove structures of the first substrate of the high-density needle selection device of the present invention, wherein the left figure is a schematic diagram of the rear side groove structure, and the right figure is a schematic diagram of the front side groove structure;

[0047] Figure 5 It is a structural schematic diagram of the front side of the spacer and the vertical hook slide groove section of the upper pulley block of the high-density needle selection device of the present invention;

[0048] Figure 6 It is a schematic diagram of the structure of the back side of the spacer and the vertical hook slide groove section of the lower pulley assembly of the high-density needle selection device of the present invention;

[0049] Figure 7 It is a structural diagram of an embodiment of a vertical hook in the high-density needle selection device of the present invention;

[0050] Figure 8 It is a structural diagram of another embodiment of a vertical hook in the high-density needle selection device of the present invention;

[0051] Fig. 9 It is a schematic structural diagram of the I-shaped iron core and the armature hook of the high-density needle selection device of the present invention when forming a closed magnetic circuit;

[0052] Fig.10 A three-dimensional diagram of a pulley block in a high-density needle selection device of the present invention;

[0053] Fig.11 An exploded view of a pulley block in a high-density needle selection device of the present invention;

[0054] Fig.12 It is a schematic diagram of the structure of the high-density needle selection device of the present invention after the double electromagnets and the electromagnet frame are assembled;

[0055] Fig.13 An exploded view of an embodiment of an A-type multi-layer slot plate assembly of a high-density needle selection device of the present invention;

[0056] Fig.14 An exploded view of an embodiment of a B-type double-layer slot plate assembly of a high-density needle selection device of the present invention;

[0057] Fig.15 It is a structural schematic diagram of a high-density needle selection device assembly of the present invention;

[0058] Fig.16 Schematic diagram of the Stäubli M4 / M5 module substrate. DETAILED DESCRIPTION

[0059] 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.

[0060] See also Figure 1 and Figure 2 As shown, a high-density needle selection device based on a double-layer pulley group slot plate includes a double-layer pulley group slot plate, and the double-layer pulley group slot plate can be assembled in sequence from front to back in the order of a second substrate 10, a first substrate 9, and a second substrate 10, or can be assembled in sequence from front to back in the order of a first substrate 9, a second substrate 10, and a first substrate 9.

[0061] See also Figure 3As shown, the groove types on the front side of the first substrate 9 are, from top to bottom, the first half-side groove 901 of the upper pulley block vertical hook, the first half-side groove 902 of the upper pulley line of the upper pulley block, the first half-side groove 903 of the pulley of the upper pulley block, and the first half-side groove 904 of the lower pulley line of the upper pulley block. The groove types on the rear side of the first substrate 9 are, from top to bottom, the first half-side groove 905 of the lower pulley block vertical hook, the first half-side groove 906 of the upper pulley line of the lower pulley block, the first half-side groove 907 of the pulley of the lower pulley block, and the first half-side groove 908 of the lower pulley line of the lower pulley block.

[0062] See also Figure 4 As shown, the groove types of the rear side of the second substrate 10 are, from top to bottom, the second half-side groove 1001 of the upper pulley block vertical hook, the second half-side groove 1002 of the upper pulley line of the upper pulley block, the second half-side groove 1003 of the pulley of the upper pulley block, and the second half-side groove 1004 of the lower pulley line of the upper pulley block. The groove types of the front side of the second substrate 10 are, from top to bottom, the second half-side groove 1005 of the lower pulley block vertical hook, the second half-side groove 1006 of the upper pulley line of the lower pulley block, the second half-side groove 1007 of the pulley of the lower pulley block, and the second half-side groove 1008 of the lower pulley line of the lower pulley block.

[0063] See also Figure 3 and Figure 4 As shown, the first substrate 9 and the second substrate 10 are both plastic parts that are molded by one-time injection molding. Buckles are respectively provided on the front and rear surfaces of the first substrate 9 and the second substrate 10. The rear side surface of the second substrate 10 is superimposed and spliced ​​with the front side surface of the first substrate 9 through the corresponding buckles, and the rear side surface of the first substrate 9 is superimposed and spliced ​​with the front side surface of the second substrate 10 through the corresponding buckles.

[0064] See also Figure 3 and Figure 4 As shown, the lower side end surface of the first substrate 9 and the lower side end surface of the second substrate 10 are respectively provided with positioning notches 20 for judging whether the two are correctly assembled. When the first substrate 9 and the second substrate 10 are assembled facing each other with the correct side groove type, the positioning notch 20 on the first substrate 9 is left-right fitted with the positioning notch 20 on the second substrate 10.

[0065] See also Figure 1As shown, when the groove shape of the rear side of the second substrate 10 is combined with the groove shape of the front side of the first substrate 9, one of the spaces in the double-layer pulley block groove plate is formed, namely, the upper pulley assembly functional layer. The upper pulley assembly functional layer is divided into four functional sections from top to bottom, namely, the upper pulley block vertical hook slide section, the upper pulley block upper pulley line groove section, the upper pulley block pulley slide section, and the upper pulley block lower pulley line groove section. The four functional sections are respectively composed of the second half-side groove 1001 of the upper pulley block vertical hook, the second half-side groove 1002 of the upper pulley line of the upper pulley block, the second half-side groove 1003 of the pulley of the upper pulley block, and the second half-side groove 1004 of the lower pulley line of the upper pulley block on the rear side of the second substrate 10, and the first half-side groove 901 of the upper pulley block vertical hook, the first half-side groove 902 of the upper pulley line of the upper pulley block, the first half-side groove 903 of the pulley of the upper pulley block, and the first half-side groove 904 of the lower pulley line of the upper pulley block on the front side of the first substrate 9.

[0066] See also Figure 2 As shown, when the groove shape of the rear side of the first substrate 9 and the groove shape of the front side of the second substrate 10 are combined, another space in the double-layer pulley block groove plate is formed, namely, the lower pulley assembly functional layer. The lower pulley block functional layer is divided into four functional sections from top to bottom, namely, the lower pulley block vertical hook groove section, the lower pulley block upper pulley line groove section, the lower pulley block pulley groove section, and the lower pulley block lower pulley line groove section. The four functional sections are respectively composed of the first half side groove 905 of the lower pulley group vertical hook, the first half side groove 906 of the upper pulley line of the lower pulley group, the first half side groove 907 of the lower pulley group pulley, and the first half side groove 908 of the lower pulley line of the lower pulley group on the rear side of the first substrate 9 and the second half side groove 1005 of the lower pulley group vertical hook, the second half side groove 1006 of the upper pulley line of the lower pulley group, the second half side groove 1007 of the lower pulley group pulley, and the second half side groove 1008 of the lower pulley line of the lower pulley group on the front side of the second substrate 10.

[0067] The functional layer of the upper pulley assembly and the functional layer of the lower pulley assembly are overlapped front and back inside the double-layer pulley block groove plate. The position of the upper pulley block vertical hook slide groove section corresponds front and back to the position of the lower pulley block vertical hook slide groove section, and the thickness is the same. The pulley slide groove section of the upper pulley block corresponds front and back to the position of the upper pulley line groove section of the lower pulley block, and the thickest pulley block bracket section of the pulley slide groove section of the upper pulley block is located at the center of the double-layer pulley block groove plate, and the upper pulley line groove section of the lower pulley block is located on both sides of the double-layer pulley block groove plate, and does not conflict with the pulley block bracket section of the pulley slide groove section of the lower pulley block located at the center of the double-layer pulley block groove plate. The pulley groove section of the upper pulley block and the pulley groove section of the lower pulley block are designed to be staggered and stacked up and down on the front and rear sides, and the pulley groove section of the upper pulley block and the pulley groove section of the lower pulley block have the same thickness, providing space for the subsequent staggered installation of the upper pulley block and the lower pulley block.

[0068] In order to accommodate two needle selection units in one slot plate without increasing the width and thickness of the slot plate, the present invention needs to design two substrates with different double-sided slot types, so as to realize a double-layer structure in the slot plate and realize a combination of two needle selection units, which only occupies the same width (35mm) and thickness (5mm) of the original one needle selection unit.

[0069] See also Figure 1 As shown, when the second substrate 10, the first substrate 9, and the second substrate 10 are assembled, the first substrate 9 in the middle is used as the central panel, and the second substrates 10 at the front and rear sides are side panels.

[0070] See also Figure 2 As shown, when the first substrate 9, the second substrate 10, and the first substrate 9 are spliced ​​together, the second substrate 10 located in the middle is used as the central plate, and the first substrates 9 located at the front and rear sides are side plates.

[0071] See also Figure 1 and Figure 2As shown, a spacer 1 is provided on the top of the first substrate 9 located in the middle or the second substrate 10 located in the middle, and two electromagnets are provided on the spacer 1 through an electromagnet skeleton 2, and the two electromagnets have two intersecting magnetic pole surfaces. A pair of armature hooks for cooperating with a pair of vertical hooks on the same side are respectively provided on the left and right sides of the two electromagnets, and the two pairs of armature hooks are designed differently and are respectively located on the inner side of a pair of vertical hooks on the same side. The shaft holes of the two pairs of armature hooks are respectively connected to the front and rear sides of the spacer 1 through a pair of rotating shafts provided on the spacer 1, and the rear side surfaces of the hook tips of the two pairs of armature hooks are respectively elastically connected to the left and right sides of the electromagnet skeleton 2 through a pair of springs. The intersecting magnetic pole surfaces of the two electromagnets are respectively matched with the two side surfaces of the corresponding pair of armature hooks to form a closed magnetic circuit, and the two pairs of rotating shafts are respectively located outside the two closed magnetic circuits, and the hook tips and magnetic poles of the armature hooks are on the same side of the rotating shaft. The two second substrates 10 located on both sides or the tops of the two first substrates 9 located on both sides are respectively provided with heat sinks 15 corresponding to the respective positions of the electromagnets. The heat sink 15 is used to dissipate heat for the coil of the electromagnet and play an electromagnetic shielding role. The heat sink 15 is made of non-magnetic metal material, and at least one surface of the heat sink 15 is exposed to the outside and in good contact with the metal body to conduct heat and electricity to the outside.

[0072] The electromagnet coil of the needle selection device is a heating element. During long-term continuous operation, the temperature at the center of the coil is very high, and may even damage the insulation layer of the enameled wire, causing the coil to short-circuit and burn. Currently, most coils are plastic-packaged, which has poor thermal conductivity, and multiple coils are densely installed, which is not conducive to heat dissipation. The heat sink provided in the present invention is in close contact with the coil to conduct heat. The heat sink is made of non-magnetic materials with good thermal and electrical conductivity, such as copper, aluminum or their alloy materials. While conducting heat, it can provide both magnetic and electrical shielding, thereby playing a role in resisting electromagnetic interference.

[0073] See also Figure 1 and Figure 2 As shown, a pair of corresponding vertical hooks are respectively arranged in the vertical hook chute section of the upper pulley block and the vertical hook chute section of the lower pulley block. A corresponding set of pulley blocks are respectively arranged in the pulley chute section of the upper pulley block and the pulley chute section of the lower pulley block, and the two sets of pulley blocks are stacked in an up-and-down staggered manner on the front and back sides of the double-layer pulley block groove plate. The two pairs of vertical hooks are respectively connected to the upper pulleys of the corresponding set of pulley blocks through pulley lines, and the lower pulleys of the two sets of pulley blocks are respectively connected to the corresponding head line joints through pulley lines. The two pairs of vertical hooks drive the corresponding set of pulley blocks through the upper pulley line to slide up and down.

[0074] from Figure 5 and Figure 6It can be seen that the two pairs of vertical hooks are respectively a pair of first vertical hooks 6a and a pair of second vertical hooks 6b with the same structure; the two pulley blocks are respectively an upper pulley block 7a and a lower pulley block 7b with the same structure; the two electromagnets stacked up and down are respectively an upper electromagnet 3a and a lower electromagnet 3b with symmetrical structures; the two pairs of armature hooks are respectively an upper armature hook 4a and a lower armature hook 4b with different structures; the two pairs of springs are respectively a pair of first springs 5a and a pair of second springs 5b with the same structure; the two pairs of rotating shafts are respectively a first rotating shaft 8a and a second rotating shaft 8b with the same structure.

[0075] Because the upper pulley assembly functional layer and the lower pulley assembly functional layer are designed to overlap front and back inside the double-layer pulley block slot plate, two groups of pulley blocks with the same structure, i.e., the upper pulley block 7a and the lower pulley block 7b, can be accommodated at the same time without increasing the thickness of the slot plate. Also, because of the upper and lower symmetrical design of the upper electromagnet 3a and the lower electromagnet 3b, and the different hook designs of the upper armature hook 4a and the lower armature hook 4b, two pairs of vertical hooks of the same shape can be used in the upper pulley block vertical hook slot section and the lower pulley block vertical hook slot section, i.e., a pair of first vertical hooks 6a and a pair of second vertical hooks 6b.

[0076] See also Figure 5As shown, the specific structure in the functional layer of the upper pulley assembly is that a pair of the first vertical hooks 6a can be slidably arranged on the left and right sides of the upper pulley group vertical hook slot section, respectively, and the upper pulley group 7a can be slidably arranged in the pulley slot section of the upper pulley group, and the two ends of the pulley line of the upper pulley of the upper pulley group 7a are respectively connected with the pair of the first vertical hooks 6a, one end of the pulley line of the lower pulley of the upper pulley group 7a is fixed, and the other end is connected with the first first line joint 16a; the first vertical hook 6a drives the upper pulley group 7a to rise and fall in the pulley slot section of the upper pulley group as the knife is lifted and lowered in the vertical hook slot section of the upper pulley group; the upper electromagnet 3a is fixedly installed on the upper end of the electromagnet skeleton 2, a pair of the upper armature hooks 4a are respectively located on the left and right sides of the upper electromagnet 3a, and a pair of the upper armature hooks 4a are located on the inner side of the pair of first vertical hooks 6a, and the axial hole portions of the pair of upper armature hooks 4a are connected to the spacer through the corresponding pair of first rotating shafts 8a. 1 is rotatably connected to the corresponding points on the front side of the upper electromagnet skeleton 2, the rear sides of the hook tips of a pair of upper armature hooks 4a are elastically connected to the corresponding points on the left and right sides of the upper part of the electromagnet skeleton 2 through a pair of first springs 5a, the intersecting magnetic pole surfaces of the upper electromagnet 3a cooperate with the two side surfaces of a pair of upper armature hooks 4a to form a corresponding front closed magnetic circuit, and the two first rotating shafts 8a are both located outside the front closed magnetic circuit, and the hook tip and the magnetic pole of the upper armature hook 4a are both on the same side of the first rotating shaft 8a; when the upper electromagnet 3a is energized, the upper armature hook 4a is maintained at the front closed magnetic circuit position, the hook tip of the upper armature hook 4a does not contact the hook tip of the first vertical hook 6a, and is in a decoupled state; when the upper electromagnet 3a is not energized, the upper armature hook 4a moves away from the magnetic pole of the upper electromagnet 3a under the action of the first spring 5a, and the hook tip of the upper armature hook 4a hooks the hook tip of the first vertical hook 6a in a pulling manner, and is in a hooked state.

[0077] See also Figure 6As shown, the specific structure in the functional layer of the lower pulley assembly is that a pair of the second vertical hooks 6b can be slidably arranged on the left and right sides of the vertical hook slide groove section of the lower pulley group, and the lower pulley group 7b can be slidably arranged in the pulley slide groove section of the lower pulley group, and the two ends of the pulley line of the upper pulley of the lower pulley group 7b are respectively connected with the pair of the second vertical hooks 6b, one end of the pulley line of the lower pulley of the lower pulley group 7b is fixed, and the other end is connected with the second first line joint 16b; the second vertical hook 6b drives the lower pulley group 7b to rise and fall in the pulley slide groove section of the lower pulley group as the knife is lifted; the lower electromagnet 3b is fixedly installed at the lower end of the electromagnet skeleton 2, a pair of the lower armature hooks 4b are respectively located on the left and right sides of the lower electromagnet 3b, and a pair of the lower armature hooks 4b are located on the inner sides of the pair of second vertical hooks 6b, and the axial hole portions of the pair of the lower armature hooks 4b are connected to the spacer through a corresponding pair of second rotating shafts 8b. 1 is rotatably connected to the corresponding points on the rear side of the lower side of the electromagnet skeleton 2, and the rear side surfaces of the hook tips of the pair of lower armature hooks 4b are elastically connected to the corresponding points on the left and right sides of the lower part of the electromagnet skeleton 2 through a pair of second springs 5b, respectively. The intersecting magnetic pole surfaces of the upper electromagnet 3a cooperate with the two side surfaces of the pair of lower armature hooks 4b to form a corresponding back closed magnetic circuit, and the two second rotating shafts 8b are both located outside the back closed magnetic circuit, and the hook tip and the magnetic pole of the lower armature hook 4b are both on the same side of the second rotating shaft 8b; when the lower electromagnet 3b is energized, the lower armature hook 4b is maintained at the back closed magnetic circuit position, and the hook tip of the lower armature hook 4b does not contact the hook tip of the second vertical hook 6b, and is in a dehooking state; when the lower electromagnet 3b is not energized, the lower armature hook 4b moves away from the magnetic pole direction of the lower electromagnet 3b under the action of the second spring 5b, and the hook tip of the lower armature hook 4b hooks the hook tip of the second vertical hook 6b in a lifting manner, and is in a hooking state.

[0078] See also Fig.16 As shown in the figure, taking the M4 / M5 components of Stäubli, which are widely used in the market, as an example, there are the following disadvantages:

[0079] 1. The M4 / M5 assembly does not have a full-range linear guide for the vertical hook lifting and lowering, and the upper part of the guide is intentionally bent. Fig.11 The middle C indicates the guide groove of the M4 / M5 assembly that limits the movement of the vertical hook. The upper part of the guide groove is curved so that the vertical hook will tilt when it moves to this point, forming a dehooking posture.

[0080] 2. The M4 / M5 assembly does not have a fixed-height convex edge, but a molded elastic part. Therefore, if the M4 / M5 assembly is pressed on this elastic part for a long time during operation (such as when the knife is fully raised), it will cause plastic deformation and lose elasticity and function;

[0081] 3. The M4 / M5 assembly does not have a retaining section with a convex edge, so the "tool lifting tolerance" performance is poor;

[0082] 4. The M4 / M5 assembly does not have a fixed "unhooking margin". Due to the curved guide rail, the vertical hook is not vertical in the high position and is tilted. Due to the presence of the elastic part, the distance between the tip of the vertical hook and the tip of the armature hook is uncertain.

[0083] 5. The M4 / M5 assembly does not have a "dynamic magnetic gap" design. In fact, its working principle is to move directly from a static magnetic gap to a closed magnetic gap. The design of the curved guide rail and the elastic parts are designed to press the armature hook as close to the electromagnet pole as possible. However, due to factors such as vibration during operation, it will cause uncertainty.

[0084] In order to solve the shortcomings of the M4 / M5 assembly of Staubli Company, the present invention firstly designs four functional sections of the upper pulley block vertical hook chute section, the upper pulley block upper pulley line chute section, the upper pulley block pulley chute section, and the upper pulley block lower pulley line chute section in the front structure of the double-layer pulley block slot plate, and designs four functional sections of the lower pulley block vertical hook chute section, the lower pulley block upper pulley line chute section, the lower pulley block pulley chute section, and the lower pulley block lower pulley line chute section in the rear structure of the double-layer pulley block slot plate. The present invention then improves and optimizes the structures of the first vertical hook and the second vertical hook.

[0085] See also Figure 7 and Figure 8 As shown, the first vertical hook 6a and the second vertical hook 6b of the present invention have the same structure and both include a rod-shaped body 601, and a side ear portion 602 for hooking with the blade of the lifting knife is provided in the middle of the outer side of the rod-shaped body 601. When working, the side ear portion 602 is directly hung on the blade of the lifting knife, and the lifting knife pulls the vertical hook to move through the side ear portion 602, and a top hook portion 603 is provided at the top end of the inner side of the rod-shaped body 601, and the hook tip of the top hook portion 603 is close to the inner edge of the rod-shaped body 601, and the hook bottom of the top hook portion 603 is close to the axis of the rod-shaped body 601.

[0086] A convex edge is provided at the upper edge of the inner side of the rod-shaped body 601 and below the top hook 603, which is used to laterally push the armature hook on the corresponding side and keep it in position. The convex edge laterally protrudes from the hook tip of the top hook 603. The contour curve of the convex edge is divided into a pushing section 604a located in the upper section and a retaining section 604b located in the lower section. The pushing section 604a is an inclined curve starting from the bottom of the hook of the top hook 603, and the retaining section 604b is a straight line parallel to the moving direction of the rod-shaped body 601. The pushing section 604a and the retaining section 604b are smoothly connected. In the early stage of the vertical hook upward process, the pushing section 604a can generate an outward lateral thrust on the armature hook in contact with it, and in the middle and late stages of the vertical hook upward process, the retaining section 604b can apply a retaining force to the armature hook that has generated a lateral displacement.

[0087] The distance from the bottom of the retaining section 604b to the bottom of the top hook 603 is greater than the distance from the hook tip of the top hook 603 to the bottom of the top hook 603. This distance difference is also the distance between the hook tip of the armature hook and the hook tip of the vertical hook in the unhooked state, so it is defined as the unhooking margin, which is a tolerance margin. Figure 7 As shown, Figure 7 D in the middle represents the unhooking margin. Due to the existence of the unhooking margin D, the hook tip of the armature hook does not contact the top hook part of the vertical hook. Even if vibration or the like occurs, the top hook part of the vertical hook will not catch the hook tip of the armature hook, thereby avoiding the failure of unhooking. The unhooking margin ensures the reliability of the unhooking action under complex working conditions.

[0088] The length of the retaining section 604b 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 the tolerance range, the armature hook in contact with the convex edge remains in the position of the dynamic magnetic gap 17. The retaining section 604b is actually a straight section. In this section of the retaining section 604b, the armature hook in contact with it will not have a lateral displacement, but will remain in the position of the dynamic magnetic gap 17. The dynamic magnetic gap 17 is the distance between the magnetic pole surface of the armature hook and the magnetic pole surface of the electromagnet under the action of the convex edge, and the value range of the dynamic magnetic gap 17 is 0 to 0.3 mm.

[0089] 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 multiple blades; the blade is up to 2 meters long (the blade of a large needle number jacquard machine is longer), and the blade will be deformed during work, resulting in errors in the position of different points on the same blade; the jacquard fabric pattern is different, resulting in uneven force on different positions of the same blade, and even different forces on both sides of the blade and at both ends of the blade will produce torsional torque, which will cause permanent deformation of the blade in severe cases. So there is a concept of "blade lifting 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 "blade lifting 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 armature hook can be kept in a smaller dynamic magnetic gap. When the electromagnet coil is energized, the 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 "blade lifting 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.

[0090] A section of limiting convex edge 605 is provided along the edge of the middle and lower part of the inner side of the rod-shaped body 601 for engaging with the vertical hook guide rail and ensuring that the vertical hook does not produce lateral displacement, and the top of the limiting convex edge 605 is connected in a parallel straight line with the bottom end of the convex edge holding section 604b. Since the vertical hook is arranged in the vertical hook guide rail of the substrate 1, the vertical hook needs to have a rod-shaped body 601 that cooperates with it to ensure that the vertical hook does not have lateral displacement when it moves up and down in the vertical hook guide rail. Since the dynamic magnetic gap 17 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 is stable, and when the vertical hook moves up and down, it is ensured that there is no other lateral displacement, otherwise the size of the dynamic magnetic gap cannot be controlled.

[0091] At least one damping groove 606 is provided between the side ear 602 and the rod-shaped body 601 to block the vibration of the knife lifting, so as to prevent the vibration of the knife lifting from being transmitted to the top hook 603 through the side ear 602, thereby improving the reliability of the operation. The number of the damping grooves 606 can be designed according to the requirements, for example, it can be designed as follows: Figure 7 The single slot method shown can also be designed as Figure 8 Double slot method shown.

[0092] The above optimization and improvement actually provide a new unhooking hook technology, which involves the hook design of the vertical hook and the unhooking margin formed by the linear guide rail and the vertical hook convex edge. This allows the electromagnets to be stacked up and down and the armature hooks to be oriented in opposite directions (the hook of the upper armature hook is downward and the hook of the lower armature hook is upward), so the upper and lower electromagnets can use the same vertical hook. This technology has not been disclosed in the prior art. Although the prior art has stacked electromagnets up and down, it uses a long and short vertical hook solution in the same direction, which will make the working state of the upper and lower needle selectors inconsistent.

[0093] The magnetic circuit structure in the upper pulley assembly functional layer of the present invention is composed of an upper electromagnet 3a and two upper armature hooks 4a, and the magnetic circuit structure in the lower pulley assembly functional layer is composed of a lower electromagnet 3b and two lower armature hooks 4b.

[0094] See also Fig. 9 As shown, the upper armature hook 4a and the lower armature hook 4b both include a straight rod portion 401, a pole surface sliding contact portion 404, a pole surface suction contact portion 405, an axial hole portion 402, a hook tip portion 403 and a spring positioning column 406. The cross-section of the straight rod portion 401 is rectangular, but not limited to a rectangle. The axial hole portion 402 is arranged at one end of the straight rod portion 401 through the pole surface sliding contact portion 404, and the hook tip portion 403 is arranged at the other end of the straight rod portion 401 through the pole surface suction contact portion 405. The spring positioning column 406 is arranged on the side wall of the straight rod portion 401 facing the electromagnet.

[0095] See also Figure 5 and Figure 6 As shown, the difference is that the shaft hole portion 402 of the lower armature hook 4b is at the lower end of the straight rod portion 401, and the hook tip portion 403 is at the upper end of the straight rod portion 401, while the shaft hole portion 402 of the upper armature hook 4a is at the upper end of the straight rod portion 401, and the hook tip portion 403 is at the lower end of the straight rod portion 401. In addition, the hook tip portion 403 of the lower armature hook 4b is designed as a "lifting hook" structure, while the hook tip portion 403 of the upper armature hook 4a is designed as a "lifting hook" structure.

[0096] See also Fig. 9 As shown, the upper electromagnet 3a and the lower electromagnet 3b have the same structure, both of which are formed by winding enameled wire around an I-shaped iron core 301. The crossbeam at one end of the I-shaped iron core 301 is a long magnetic pole 302, and the crossbeam at the other end of the I-shaped iron core 301 is a short magnetic pole 303. During installation, the long magnetic pole 302 of the upper electromagnet 3a is on the top and the short magnetic pole 303 is on the bottom, while the long magnetic pole 302 of the lower electromagnet 3b is on the bottom and the short magnetic pole 303 is on the top. Fig. 9It can be clearly seen that the left and right ends of the long magnetic pole 302 have first bent portions bent backward, and the left and right ends of the short magnetic pole 303 have second bent portions bent forward, and the first bent portion and the second bent portion are in a front-to-back misalignment form, and the misalignment amplitude is equal to the thickness of the straight rod portion 401. This is what makes the present invention different from the traditional solution. The iron core of the traditional solution is usually a planar structure with the magnetic poles facing the same direction, while the iron core of the present invention is actually a three-dimensional structure.

[0097] The concave surface of the first bending portion is used as a sliding magnetic pole surface 304, and a magnetic plastic upper cover 306 is arranged in front of the sliding magnetic pole surface 304. There is a gap between the magnetic plastic upper cover 306 and the sliding magnetic pole surface 304 to form a groove for the straight rod 401 to be inserted, and a magnetic elastic member 307 for contacting the straight rod 401 is arranged in the groove. The side end surface of the second bending portion is used as an attraction magnetic pole surface 305. The sliding magnetic pole surface 304 and the attraction magnetic pole surface 305 located on the same side constitute two intersecting magnetic pole surfaces.

[0098] See also Figure 2-Figure 3 As shown, during assembly, the axial hole portion 402 of the upper armature hook 4a and the lower armature hook 4b are rotatably mounted on the first rotating shaft 8a and the second rotating shaft 8b, respectively, one end of the first spring 5a is fixed on the spring positioning column 406 of the upper armature hook 4a, one end of the second spring 5b is fixed on the spring positioning column 406 of the lower armature hook 4b, and the other ends of the first spring 5a and the second spring 5b are fixedly connected to corresponding points on the side wall of the electromagnet skeleton 2, respectively.

[0099] See also Fig. 9 As shown, after assembly, the magnetic pole surface sliding contact portion 404 is tightly and slidably embedded in the groove formed by the sliding magnetic pole surface 304, the magnetic conductive plastic upper cover 306 and the magnetic conductive elastic member 307, and the magnetic pole surface suction contact portion 405 is laterally aligned with the suction magnetic pole surface 305. When the magnetic pole surface suction contact portion 405 is in contact with the suction magnetic pole surface 305, the three sides of the magnetic pole surface sliding contact portion 404 are respectively in contact with the sliding magnetic pole surface 304, the magnetic conductive plastic upper cover 306 and the magnetic conductive elastic member 307, forming a three-sided magnetic conductive effect with excellent magnetic conductive effect, so that the sliding magnetic pole surface 304, the magnetic pole surface sliding contact portion 404, the straight rod portion 401, the magnetic pole surface suction contact portion 405 and the suction magnetic pole surface 305 form a closed magnetic circuit.

[0100] After assembly, the matching surfaces of the hook tip 403 of the upper armature hook 4a and the top hook portion 603 of the first vertical hook 6a and the matching surfaces of the hook tip 403 of the lower armature hook 4b and the top hook portion 603 of the second vertical hook 6b are at the same height position in the hooking state.

[0101] When the vertical hook moves upward, the pushing section of the convex edge on the vertical hook laterally pushes the armature hook in contact with it to rotate around the corresponding rotating shaft, and the pole surface attraction contact portion 405 of the armature hook moves from the static magnetic gap position away from the attraction pole surface 305 of the electromagnet to the direction close to the attraction pole surface 305 of the electromagnet, and the pole surface attraction contact portion 405 of the armature hook is stopped at the dynamic magnetic gap position close to the attraction pole surface 305 of the electromagnet by the holding section of the convex edge. At this time, the coil of the electromagnet is energized to attract the pole surface attraction contact portion 405 of the armature hook to the closed magnetic circuit position, and the holding section of the convex edge does not generate a force for the lateral displacement of the armature hook, thereby causing the hook tip of the armature hook to separate from the top hook portion of the vertical hook.

[0102] When the vertical hook moves downward and the coil of the electromagnet is not energized, the attraction pole surface 305 of the electromagnet does not generate an adsorption force on the attraction contact portion 405 of the pole surface of the armature hook, and the spring gives the armature hook an outward elastic force. When the vertical hook moves downward until its top hook portion is aligned with the hook tip portion of the armature hook, the spring obtains a release space, and rotates the attraction contact portion 405 of the pole surface of the armature hook from the closed magnetic circuit position directly through the dynamic magnetic gap position to the static magnetic gap position. At this time, the hook tip portion of the armature hook is just stuck in the top hook portion of the vertical hook, so that the hook tip portion of the armature hook is hooked with the top hook portion of the vertical hook.

[0103] from Fig. 9 It can be clearly seen that the shaft hole portion 402 is located outside the closed magnetic circuit and does not participate in the magnetic conduction path of the closed magnetic circuit. This design not only allows the magnetic pole surface suction contact portion 405 of the armature hook to be aligned with the suction magnetic pole surface 305 of the I-shaped iron core 301 in height position, so that the magnetic pole surface suction contact portion 405 of the armature hook can just be in close contact with the end face of the suction magnetic pole surface 305 of the I-shaped iron core 301 when the magnetic circuit is closed, but also allows the magnetic pole surface sliding contact portion 404 of the armature hook to maintain sliding contact with the sliding magnetic pole surface 304 of the I-shaped iron core 301 when the armature hook rotates around the rotating shaft at a certain angle, thereby maintaining a magnetic circuit connection with low magnetic resistance.

[0104] from Fig. 9It can be clearly seen that the electromagnet and the armature hook form a closed magnetic circuit. In the prior patent 1 mentioned in the background technology, the armature hook's rotating shaft is at one of the magnetic poles of the iron core, forming an arc-shaped magnetic gap. However, in actual processing, the arc-shaped magnetic gap is difficult to control. A small magnetic gap may make the rotation inflexible, and a large magnetic gap affects the electromagnet's suction. However, the rotating shaft of the present invention is not in a closed magnetic circuit, and the armature hook is in planar sliding contact with the side of the magnetic pole. On the one hand, the magnetic gap is small, and on the other hand, it is easier to ensure the consistency of the external dimensions and batch size during parts processing.

[0105] The advantage of the rotating shaft at the magnetic pole is that it has a constant magnetic resistance. If the rotating shaft is simply moved away from the magnetic pole position, a double-end magnetic gap will be formed, that is, the armature hook forms an active magnetic gap with changing magnetic resistance at both magnetic poles of the I-beam core, which is more difficult to control. The technical solution of the present invention also has the characteristic of basically stable magnetic resistance in the plane sliding magnetic gap, avoiding the aforementioned double-end magnetic gap. This spatial twisted magnetic circuit design also achieves a purpose, that is, through the twisting of the magnetic circuit, the electromagnet located in the middle position is connected to the armature hooks located on both sides, so that two sets of independent needle selection devices can be accommodated in one unit.

[0106] The magnetic pole end of the armature hook of the present invention can move between three positions: from the static magnetic gap 18 to the dynamic magnetic gap 17 is a section with a larger range, which is achieved by the vertical hook convex edge pushing the armature hook to move horizontally when the vertical hook moves upward (using external force to achieve a larger range of displacement); from the dynamic magnetic gap 17 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).

[0107] See also Figure 6As shown, it can be clearly seen that the right side of the functional layer of the lower pulley assembly is in a decoupled state, and the lower armature hook 4b on the right side is in a position where it is pushed by the convex edge of the second vertical hook 6b on the right side to the short magnetic pole position on the right side of the lower electromagnet 3b, that is, the position of the dynamic magnetic gap 17, which is a very small magnetic gap. The electromagnetic force of the known electromagnet is inversely proportional to the square of the distance. In the case of a small magnetic gap, the coil of the lower electromagnet 3b will generate a relatively large electromagnetic force when it is energized, which will attract the lower armature hook 4b on the right side to the short magnetic pole on the right side of the lower electromagnet 3b, that is, the closed magnetic circuit position, and the second spring 5b on the right side is compressed at this time. As long as the suction force of the lower electromagnet 3b on the right side is greater than the elastic force of the second spring 5b on the right side, when the second vertical hook 6b on the right side moves down, even without the effect of the convex edge on the second vertical hook 6b on the right side, the lower armature hook 4b on the right side will remain in this closed magnetic circuit position by electromagnetic force. When the second vertical hook 6b on the right side continues to move downward until its hook tip is opposite to the hook tip of the lower armature hook 4b on the right side, due to the existence of the unhooking margin, the second vertical hook 6b on the right side can be smoothly moved downward to the bottom of the lower armature hook 4b on the right side, thereby achieving reliable unhooking. This is actually a new unhooking technology, which uses the unhooking margin parameters in the design stage to ensure the reliability of operation under complex working conditions.

[0108] It is very important to limit the dynamic magnetic gap 17 to a relatively small range, such as 0 to 0.3 mm. This is the key to the present invention and is 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 17 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 17 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.

[0109] See also Figure 6 As shown, it can be clearly seen that the left side of the functional layer of the lower pulley assembly is in a hook state, and the lower armature hook 4b on the left side is pushed by the second spring 5b on the left side to the short magnetic pole position away from the left side of the lower electromagnet 3b, and the second vertical hook 6b on the left side is hooked, forming a relatively large static magnetic gap 18. The lateral displacement of the lower armature hook 4b on the left side is actually a rotation around the corresponding rotating shaft. In this embodiment, the rotating shaft is located below the lower electromagnet 3b. The vertical hook slide groove section of the lower pulley assembly is engaged with the convex edges on the two second vertical hooks 6b rod bodies to ensure that the second vertical hooks 6b have no lateral displacement when moving up and down.

[0110] See also Figure 5 As shown, it can be clearly seen that the right side in the functional layer of the upper pulley assembly is in a dehooking state, the first vertical hook 6a on the right side pushes the upper armature hook 4a on the right side to the short magnetic extreme end of the upper electromagnet 3a, and is in a dynamic magnetic gap position, and the first spring 5a on the right side is compressed. At this time, the coil of the upper electromagnet 3a is energized, and the suction force of the upper electromagnet 3a is greater than the elastic force of the first spring 5a on the right side. The upper armature hook 4a on the right side will be sucked into the closed magnetic circuit position and maintained at this position. If the first vertical hook 6a on the right side moves downward, dehooking can be achieved.

[0111] See also Figure 5 As shown, it can be clearly seen that the left side of the functional layer of the upper pulley assembly is in a hook state. The upper armature hook 4a on the left side moves in the direction away from the short magnetic pole of the upper electromagnet 3a under the action of the first spring 5a on the left side, to the static magnetic gap 18 position, and is in a hook state with the first vertical hook 6a on the left side. It can be seen that the shape of the upper armature hook 4a is different from that of the lower armature hook 4b, but the shape of the first vertical hook 6a is the same as that of the second vertical hook 6b. This design is very useful in high-density needle selectors that require two electromagnets stacked up and down. In such occasions, traditional technology can only use a long vertical hook (applicable to the upper armature hook) and a short vertical hook (applicable to the lower armature hook) in combination. The structural difference between the long and short vertical hooks will cause action differences.

[0112] See also Figure 5 and Figure 6 As shown, the surface of the spacer 1 is provided with a limiting protrusion for preventing the armature hook from excessively moving outward laterally under the action of the spring, and the limiting protrusion does not interfere with the movement of the vertical hook in the vertical hook guide rail.

[0113] See also Fig.12 As shown, a printed circuit board slot 19 is provided at the top of the electromagnet skeleton 2, and metal spring sheets 11 for connecting the coil leads of the electromagnet are provided on both sides of the printed circuit board slot 19, and coil lead grooves 12, first spring mounting holes 13 and second spring mounting holes 14 are provided on the left and right sides of the electromagnet skeleton 2. The first spring 5a and the second spring 5b are fixed to corresponding points on the left and right sides of the electromagnet skeleton 2 through the first spring mounting holes 13 and the second spring mounting holes 14, respectively.

[0114] See also Fig.10 and Fig.11As shown, the pulley block includes two mounting plates 701, two pulleys 702, two ball bearings 703, two pulley shafts 704, a bracket pressing protrusion 705 and a bracket pressing hole 706; the two pulleys 702 are respectively arranged at the upper and lower ends of the pulley bracket composed of two mounting plates 701 through their respective corresponding pairs of ball bearings 703 and the pulley shafts 704; the widths of the two mounting plates 701 are both smaller than the diameters of the pulleys 702; the thicknesses of the two mounting plates 701 are equal, so as to serve as positioning sliders when the pulley block moves in the pulley groove section of the upper pulley block or the pulley groove section of the lower pulley block.

[0115] Pulley block: refers to the movable pulley block, which includes two upper and lower pulleys; the fixed pulley can change the direction of force, and the movable pulley can have two functions, namely saving effort and shortening the stroke. The pulley block mainly shortens the stroke in the needle selection unit, that is, the stroke of the pulley block is 1 / 2 of the knife lifting stroke, which is equivalent to the upper pulley of the pulley block "storing" 1 / 2 of the knife lifting stroke, and then releasing it through the lower pulley. The three-position / multi-position uses this principle. The upper pulley line is in parallel, and the lower pulley line is in series. The lower pulley line can release the stroke "stored" by multiple upper pulleys.

[0116] Pulley line: The line acting on the pulley, there are two sections of pulley line, the one acting on the upper pulley is called the upper pulley line, and the one acting on the lower pulley is called the lower pulley line. Usually in the movable pulley group, the upper pulley line is the driving side, and the lower pulley line is the output side, connected to the load. In the present invention, the vertical hook connected to the end of the upper pulley line is driven by the lifting knife, one end of the lower pulley line is fixed, and the other end is the "head line", which connects the harness and heald, controls the up and down movement of the warp yarn, and is the load.

[0117] The pulley block can be installed with ball bearings or sliding bearings. Under the current pulley block structure, the load-bearing effect of ball bearings is significantly better than that of sliding bearings. However, ball bearings are limited by the balls and bearing brackets and are difficult to reduce in thickness. The pulley line itself is thin, and the space occupied by its line groove is also thin. The present invention arranges the thicker pulley assembly and the thinner pulley line groove in a left-right corresponding and complementary manner, and the two thicker pulley assemblies are stacked and staggered up and down, thereby realizing a high-density arrangement of the thicker ball bearing pulley block. This solution can also be well adapted to high-speed and high-load occasions.

[0118] The high-density needle selection device of the present invention does not reduce the number of parts, but arranges the space reasonably, the relative position of the parts is more compact, and the precision requirement is correspondingly improved. In the design of the electromagnet, the suction force of the electromagnet is basically positively correlated with the volume. Therefore, to ensure the suction force of the electromagnet, the space of the electromagnet must be ensured. The present invention adopts a double electromagnet stacked up and down, which actually maintains the volume of a single electromagnet, thereby ensuring that the electromagnet has sufficient suction. The electromagnet skeleton is to relatively fix the position relationship of the electromagnet magnetic poles, facilitate production and assembly, ensure precision, and is a quality guarantee for mass production.

[0119] See also Fig.13 As shown, a second substrate 10 and a first substrate 9 can be assembled front and back to form an A-type single-layer slot plate section, and then multiple A-type single-layer slot plate sections are stacked from front to back in sequence, and finally a second substrate 10 is assembled on the back side of the above-mentioned assembly, so as to form a group of A-type multi-layer slot plate components. In this way, the groove type in each A-type single-layer slot plate section can accommodate a group of upper pulley assemblies, and each corresponds to a needle selection unit; at the same time, the groove type formed between two adjacent A-type single-layer slot plate sections can also accommodate a group of lower pulley assemblies, and each corresponds to a needle selection unit. That is, a group of upper pulley assemblies can be accommodated between the right side of each second substrate 10 and the left side of the opposite first substrate 9, and a group of lower pulley assemblies can be accommodated between the right side of each first substrate 9 and the left side of the opposite second substrate 10, so that a group of A-type multi-layer slot plate components can correspond to multiple needle selection units to meet the needs of the needle selector assembly.

[0120] See also Fig.14 As shown, a first substrate 9 and a second substrate 10 can be assembled from left to right to form a B-type single-layer slot plate section, and then multiple B-type single-layer slot plate sections are stacked from left to right in sequence, and finally a first substrate 9 is assembled on the rightmost side of the above-mentioned assembly, so as to form a group of B-type multi-layer slot plate components. In this way, the groove type in each B-type single-layer slot plate section can accommodate a group of lower pulley assemblies, and each corresponds to a needle selection unit; at the same time, the groove type formed between two adjacent B-type single-layer slot plate sections can also accommodate a group of upper pulley assemblies, and each corresponds to a needle selection unit. That is, a group of lower pulley assemblies can be accommodated between the right side of each first substrate 9 and the left side of the opposite second substrate 10, and a group of upper pulley assemblies can be accommodated between the right side of each second substrate 10 and the left side of the opposite first substrate 9, so that a group of B-type multi-layer slot plate components can correspond to multiple needle selection units to meet the needs of the needle selector assembly.

[0121] Preferably, the upper, middle and lower parts of the first substrate 9 and the second substrate 10 are respectively provided with fixing sections, each fixing section is provided with a through hole 14, and after all the second substrates 10 and the first substrates 9 are alternately stacked and assembled, further fixation is achieved by the cooperation of fasteners and the through holes 14.

[0122] Based on the above two types of A-type multi-layer slot plate assemblies and B-type multi-layer slot plate assemblies, see Fig.15 As shown, the present invention can also be made into a 16-needle high-density needle selection device assembly formed by stacking 8 high-density needle selection devices based on double-layer pulley block groove plates disclosed above. When stacking, the first substrate 9 can be stacked alternately in the form of the first substrate 9 in front and the second substrate 10 in the back, or the second substrate 10 can be stacked alternately in the form of the first substrate 9 in the back.

[0123] 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, but can also produce needle selection device components with higher density. Based on this, the present invention can also be further made into an electronic jacquard machine equipped with the high-density needle selection device component disclosed above.

[0124] 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 high-density needle selection device based on a double-layer pulley block groove plate, characterized in that: It comprises a double-layer pulley block groove plate, wherein the front and rear interlayers in the double-layer pulley block groove plate are respectively an upper pulley assembly functional layer and a lower pulley assembly functional layer; the upper pulley block functional layer is divided into four functional sections from top to bottom, namely, a fully linear upper pulley block vertical hook slide groove section, an upper pulley line groove section of an upper pulley block, an upper pulley slide groove section of an upper pulley block, and a lower pulley line groove section of an upper pulley block; the lower pulley block functional layer is divided into four functional sections from top to bottom, namely, a fully linear lower pulley block vertical hook slide groove section, an upper pulley line groove section of a lower pulley block, and a lower pulley block slide groove section , the lower pulley block and the lower pulley line groove section; the upper pulley block vertical hook groove section and the lower pulley block vertical hook groove section are respectively provided with a corresponding pair of vertical hooks with the same structure; the upper pulley block pulley groove section and the lower pulley block pulley groove section are respectively provided with a corresponding group of pulley blocks with the same structure, and the two groups of pulley blocks are stacked in an up-and-down staggered manner on the front and back sides of the double-layer pulley block groove plate; the two pairs of vertical hooks respectively drive their corresponding group of pulley blocks to slide up and down through the upper pulley line; A spacer (1) is provided on the top of the double-layer pulley group groove plate, and two electromagnets stacked up and down are provided on the spacer (1) through an electromagnet frame (2), and the two electromagnets have two intersecting magnetic pole surfaces; a pair of armature hooks for cooperating with a pair of vertical hooks on the same side are respectively provided on the left and right sides of the two electromagnets, and the two pairs of armature hooks are designed differently and are respectively located on the inner sides of the pair of vertical hooks on the same side. The axial hole parts of the two pairs of armature hooks are respectively rotatably connected to the front and rear sides of the spacer (1) through a pair of rotating shafts provided on the spacer (1), and the rear side surfaces of the hook tips of the two pairs of armature hooks are respectively elastically connected to the left and right sides of the electromagnet frame (2) through a pair of springs. The intersecting magnetic pole surfaces of the two electromagnets are respectively matched with the two side surfaces of the corresponding pair of armature hooks to form a closed magnetic circuit. The two pairs of rotating shafts are respectively located outside the two closed magnetic circuits, and the hook tips and magnetic pole parts of the armature hooks are on the same side of the rotating shaft.

2. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 1 is characterized in that: The double-layer pulley block groove plate comprises a second substrate (10), a first substrate (9), and a second substrate (10) which are sequentially assembled from front to back, or a first substrate (9), a second substrate (10), and a first substrate (9) which are sequentially assembled from front to back; The groove shape on the rear side of the second substrate (10) is combined with the groove shape on the front side of the first substrate (9) to form the upper pulley assembly functional layer; the groove shape on the rear side of the first substrate (9) is combined with the groove shape on the front side of the second substrate (10) to form the lower pulley assembly functional layer; The upper pulley assembly functional layer and the lower pulley assembly functional layer are arranged to overlap front and back relative to the first substrate (9) or the second substrate (10) located in the middle, and the upper pulley assembly vertical hook slide groove section and the lower pulley assembly vertical hook slide groove section are located in front and back correspondence and have the same thickness; The pulley groove section of the upper pulley block corresponds to the position of the upper pulley line groove section of the lower pulley block in front and back, and the thickest pulley block bracket section of the pulley groove section of the upper pulley block is located at the center of the double-layer pulley block groove plate, and the upper pulley line groove section of the lower pulley block is located on both sides of the double-layer pulley block groove plate, and there is no conflict in space and can be nested; The lower pulley line groove section of the upper pulley block corresponds to the position of the pulley sliding groove section of the lower pulley block in front and back, and the lower pulley line groove section of the upper pulley block is located on both sides of the double-layer pulley block groove plate, and does not conflict with the pulley block bracket section of the pulley sliding groove section of the lower pulley block located at the center of the double-layer pulley block groove plate; The pulley slot section of the upper pulley block and the pulley slot section of the lower pulley block are designed to be stacked up and down at the front and rear sides, and the pulley slot section of the upper pulley block and the pulley slot section of the lower pulley block have the same thickness.

3. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 2 is characterized in that: The first substrate (9) and the second substrate (10) are both plastic parts that are molded by one-step injection molding. The front and rear surfaces of the first substrate (9) and the second substrate (10) are respectively provided with buckles. The rear side surface of the second substrate (10) and the front side surface of the first substrate (9) are superimposed and spliced ​​by the corresponding buckles, and the rear side surface of the first substrate (9) and the front side surface of the second substrate (10) are superimposed and spliced ​​by the corresponding buckles. In addition, the lower side end surface of the first substrate (9) and the lower side end surface of the second substrate (10) are respectively provided with positioning notches (20) for judging whether the two are correctly spliced. When the first substrate (9) and the second substrate (10) are spliced ​​facing each other with the correct side groove type, the positioning notch (20) on the first substrate (9) and the positioning notch (20) on the second substrate (10) are left-right fitted.

4. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 2 is characterized in that: When the second substrate (10), the first substrate (9), and the second substrate (10) are assembled, the first substrate (9) located in the middle is used as the central sheet. At this time, the spacer (1), the electromagnet frame (2), and the two electromagnets stacked up and down are arranged on the top of the first substrate (9), and the tops of the two second substrates (10) located on both sides are respectively provided with heat sinks (15) corresponding to the positions of the electromagnets respectively. When the first substrate (9), the second substrate (10), and the first substrate (9) are assembled, the second substrate (10) located in the middle is used as the central piece. In this case, the spacer (1), the electromagnet frame (2), and the two electromagnets stacked up and down are arranged on the top of the second substrate (10), and the tops of the two first substrates (9) located on both sides are respectively provided with heat sinks (15) corresponding to the positions of the electromagnets respectively. The heat sink (15) is used to dissipate heat for the coil of the electromagnet and plays an electromagnetic shielding role. The heat sink (15) is made of a non-magnetic metal material, and at least one surface of the heat sink (15) is exposed to the outside and in good contact with the metal body to conduct heat and electricity to the outside.

5. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 2 is characterized in that: The groove types on the front side of the first substrate (9) are, from top to bottom, the first half-side groove (901) of the upper pulley block vertical hook, the first half-side groove (902) of the upper pulley line of the upper pulley block, the first half-side groove (903) of the pulley of the upper pulley block, and the first half-side groove (904) of the lower pulley line of the upper pulley block; the groove types on the rear side of the second substrate (10) are, from top to bottom, the second half-side groove (1001) of the upper pulley block vertical hook, the second half-side groove (1002) of the upper pulley line of the upper pulley block, the second half-side groove (1003) of the pulley of the upper pulley block, and the second half-side groove (1004) of the lower pulley line of the upper pulley block; When the rear side surface of the second substrate (10) is joined with the front side surface of the first substrate (9) left and right, the second half-side chute (1001) of the upper pulley block vertical hook and the first half-side chute (901) of the upper pulley block vertical hook are joined front and back to form the upper pulley block vertical hook chute section, the second half-side line groove (1002) of the upper pulley line of the upper pulley block and the first half-side line groove (902) of the upper pulley line of the upper pulley block are joined front and back to form the upper pulley line line groove section of the upper pulley block, the second half-side chute (1003) of the pulley of the upper pulley block and the first half-side chute (903) of the pulley of the upper pulley block are joined front and back to form the upper pulley block pulley chute section, and the second half-side line groove (1004) of the lower pulley line of the upper pulley block and the first half-side line groove (904) of the lower pulley line of the upper pulley block are joined front and back to form the lower pulley line line groove section of the upper pulley block. The groove types on the rear side of the first substrate (9) are, from top to bottom, the first half-side groove (905) of the vertical hook of the lower pulley group, the first half-side groove (906) of the upper pulley line of the lower pulley group, the first half-side groove (907) of the pulley of the lower pulley group, and the first half-side groove (908) of the lower pulley line of the lower pulley group; the groove types on the front side of the second substrate (10) are, from top to bottom, the second half-side groove (1005) of the vertical hook of the lower pulley group, the second half-side groove (1006) of the upper pulley line of the lower pulley group, the second half-side groove (1007) of the pulley of the lower pulley group, and the second half-side groove (1008) of the lower pulley line of the lower pulley group; When the rear side surface of the first substrate (9) and the front side surface of the second substrate (10) are joined left and right, the first half side chute (905) of the lower pulley assembly vertical hook and the second half side chute (1005) of the lower pulley assembly vertical hook are joined front and back to form a lower pulley assembly vertical hook chute section, the first half side line groove (906) of the upper pulley line of the lower pulley assembly and the second half side line groove (1006) of the upper pulley line of the lower pulley assembly are joined front and back to form a lower pulley assembly upper pulley line line groove section, the first half side chute (907) of the lower pulley assembly pulley and the second half side chute (1007) of the lower pulley assembly pulley are joined front and back to form a lower pulley assembly pulley chute section, and the first half side line groove (908) of the lower pulley line of the lower pulley assembly and the second half side line groove (1008) of the lower pulley line of the lower pulley assembly are joined front and back to form a lower pulley assembly lower pulley line line groove section.

6. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 1 is characterized in that: The two pairs of vertical hooks are respectively a pair of first vertical hooks (6a) and a pair of second vertical hooks (6b) of the same structure; the two pulley blocks are respectively an upper pulley block (7a) and a lower pulley block (7b) of the same structure; the two electromagnets stacked up and down are respectively an upper electromagnet (3a) and a lower electromagnet (3b) of symmetrical structure; the two pairs of armature hooks are respectively an upper armature hook (4a) and a lower armature hook (4b) of different structure; the two pairs of springs are respectively a pair of first springs (5a) and a pair of second springs (5b) of the same structure; the two pairs of rotating shafts are respectively a first rotating shaft (8a) and a second rotating shaft (8b) of the same structure; The specific structure of the functional layer of the upper pulley assembly is that a pair of the first vertical hooks (6a) are respectively slidably arranged on the left and right sides of the vertical hook sliding groove section of the upper pulley group, and the upper pulley group (7a) is slidably arranged in the pulley sliding groove section of the upper pulley group. The pair of the first vertical hooks (6a) are connected to the upper pulley of the upper pulley group (7a) through the pulley line located in the upper pulley line groove section of the upper pulley group, and the lower pulley of the upper pulley group (7a) is connected to the first pulley through the pulley line located in the lower pulley line groove section of the upper pulley group. The first vertical hook (6a) is connected to the upper pulley block vertical hook slot section as the knife is lifted and lowered, driving the upper pulley block (7a) to rise and fall in the pulley slot section of the upper pulley block; the upper electromagnet (3a) is fixedly mounted on the upper end of the electromagnet frame (2); a pair of upper armature hooks (4a) are respectively located on the left and right sides of the upper electromagnet (3a), and the pair of upper armature hooks (4a) are located on the inner sides of the pair of first vertical hooks (6a); the axial holes of the pair of upper armature hooks (4a) are connected to the upper pulley block vertical hook slot section as the knife is lifted and lowered ... the upper electromagnet (3a) is fixedly mounted on the upper end of the electromagnet frame (2); the upper electromagnet (3a) is fixedly mounted on the upper end of the electromagnet frame (2); the upper electromagnet (3a) is fixedly mounted on the upper end of the electromagnet frame (2); the upper electromagnet (3a) is fixedly mounted on the upper end of the electromagnet frame (2); the upper electromagnet (3a) is fixedly mounted on the upper end of the electromagnet frame (2); the upper electromagnet (3a) is fixedly mounted on the upper end of the electromagnet frame (2); the upper electromagnet (3a) is fixedly mounted on the upper end of the electromag a) is rotatably connected to the corresponding point on the front side of the diaphragm (1), the rear side surfaces of the hook tips of a pair of upper armature hooks (4a) are elastically connected to the corresponding points on the left and right sides of the upper part of the electromagnet skeleton (2) through a pair of first springs (5a), the intersecting magnetic pole surfaces of the upper electromagnet (3a) cooperate with the two side surfaces of a pair of upper armature hooks (4a) to form a corresponding front closed magnetic circuit, and the two first rotating shafts (8a) are both located outside the front closed magnetic circuit, and the hook tips and magnetic poles of the upper armature hooks (4a) are both in the first springs (5a). on the same side of a rotating shaft (8a); when the upper electromagnet (3a) is energized, the upper armature hook (4a) is maintained at a front closed magnetic circuit position, the hook tip of the upper armature hook (4a) does not contact the hook tip of the first vertical hook (6a), and is in a decoupled state; when the upper electromagnet (3a) is not energized, the upper armature hook (4a) moves in a direction away from the magnetic pole of the upper electromagnet (3a) under the action of the first spring (5a), and the hook tip of the upper armature hook (4a) hooks the hook tip of the first vertical hook (6a) in a pulling manner, and is in a hooked state; The specific structure in the functional layer of the lower pulley assembly is that a pair of the second vertical hooks (6b) are respectively slidably arranged on the left and right sides of the vertical hook slide groove section of the lower pulley group, and the lower pulley group (7b) is slidably arranged in the pulley slide groove section of the lower pulley group. The pair of the second vertical hooks (6b) are connected to the upper pulley of the lower pulley group (7b) through the pulley line located in the upper pulley line groove section of the lower pulley group, and the lower pulley of the lower pulley group (7b) is connected to the second first line through the pulley line located in the lower pulley line groove section of the lower pulley group. The second vertical hook (6b) is connected to the vertical hook slide groove section of the lower pulley group and drives the lower pulley group (7b) to rise and fall in the pulley slide groove section of the lower pulley group as the knife is lifted; the lower electromagnet (3b) is fixedly mounted on the lower end of the electromagnet frame (2); a pair of lower armature hooks (4b) are respectively located on the left and right sides of the lower electromagnet (3b), and a pair of lower armature hooks (4b) are located on the inner sides of a pair of second vertical hooks (6b); the axial holes of the pair of lower armature hooks (4b) are connected to the lower pulley group in the vertical hook slide groove section of the lower pulley group along with the lifting of the knife; the lower electromagnet (3b) is fixedly mounted on the lower end of the electromagnet frame (2); a pair of lower armature hooks (4b) are respectively located on the left and right sides of the lower electromagnet (3b), and a pair of lower armature hooks (4b) are located on the inner sides of a pair of second vertical hooks (6b); the axial holes of the pair of lower armature hooks (4b) are connected to the lower pulley group in the vertical hook slide groove section of the lower pulley group through the corresponding pair of second rotating shafts (8 b) is rotatably connected to the corresponding point of the rear side of the partition (1), the rear side of the hook tip of a pair of the lower armature hooks (4b) is elastically connected to the corresponding point on the left and right sides of the lower part of the electromagnet skeleton (2) through a pair of second springs (5b), the intersecting magnetic pole surfaces of the lower electromagnet (3b) cooperate with the two side surfaces of a pair of the lower armature hooks (4b) to form a corresponding back closed magnetic circuit, and the two second rotating shafts (8b) are both located outside the back closed magnetic circuit, and the hook tip and magnetic pole of the lower armature hook (4b) are both in the first The lower electromagnet (3b) is on the same side of the second rotating shaft (8b); when the lower electromagnet (3b) is energized, the lower armature hook (4b) is maintained at the back closed magnetic circuit position, the hook tip of the lower armature hook (4b) does not contact the hook tip of the second vertical hook (6b), and is in a decoupled state; when the lower electromagnet (3b) is not energized, the lower armature hook (4b) moves in a direction away from the magnetic pole of the lower electromagnet (3b) under the action of the second spring (5b), and the hook tip of the lower armature hook (4b) hooks the hook tip of the second vertical hook (6b) in a lifting manner, and is in a hooked state.

7. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 1 is characterized in that: The vertical hook comprises a rod-shaped body (601), a side ear portion (602) for hooking with the blade of a knife is arranged in the middle of the outer side of the rod-shaped body (601), a top hook portion (603) is arranged at the top end of the inner side of the rod-shaped body (601), and the hook tip of the top hook portion (603) is close to the inner edge of the rod-shaped body (601), and the hook bottom of the top hook portion (603) is close to the axis of the rod-shaped body (601); 1) The upper edge of the inner side, and a convex edge is provided at a position below the top hook portion (603) for laterally pushing the armature hook on the corresponding side and keeping it in position, and the convex edge laterally protrudes from the hook tip of the top hook portion (603); the contour curve of the convex edge is divided into a pushing section (604a) located at the upper section and a holding section (604b) located at the lower section, and the pushing section (604a) is an inclined curve starting from the hook bottom of the top hook portion (603), and the The holding section (604b) is a straight line parallel to the moving direction of the rod-shaped body (601); the pushing section (604a) is smoothly connected with the holding section (604b); the distance from the bottom of the holding section (604b) to the bottom of the top hook (603) is greater than the distance from the hook tip of the top hook (603) to the bottom of the top hook (603); the length of the holding section (604b) of the convex edge corresponds to the jacquard machine knife lifting height allowed by the needle selection device to which it belongs The middle and lower parts of the inner side of the rod-shaped body (601) are provided with a limiting convex edge (605) along the edge thereof for engaging with the vertical hook guide rail and ensuring that the vertical hook does not produce lateral displacement, and the top end of the limiting convex edge (605) is connected to the bottom end of the convex edge retaining section (604b) in a parallel straight line; at least one shock-absorbing groove (606) for blocking the vibration of the knife is provided between the side ear portion (602) and the rod-shaped body (601).

8. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 1 is characterized in that: The armature hook comprises a straight rod portion (401), a magnetic pole surface sliding contact portion (404), a magnetic pole surface suction contact portion (405), an axial hole portion (402), a hook tip portion (403) and a spring positioning column (406); the cross section of the straight rod portion (401) is rectangular; the axial hole portion (402) is arranged at one end of the straight rod portion (401) through the magnetic pole surface sliding contact portion (404); the hook tip portion (403) is arranged at the other end of the straight rod portion (401) through the magnetic pole surface suction contact portion (405); and the spring positioning column (406) is arranged on the side wall of the straight rod portion (401) facing the electromagnet; The electromagnet is formed by winding enameled wire around an I-shaped iron core (301); a cross beam at one end of the I-shaped iron core (301) is a long magnetic pole (302), and a cross beam at the other end of the I-shaped iron core (301) is a short magnetic pole (303); the left and right ends of the long magnetic pole (302) have a first bending portion bent backwards, and the left and right ends of the short magnetic pole (303) have a second bending portion bent forwards, the first bending portion and the second bending portion are in a front-to-back misalignment, and the misalignment amplitude is equal to the thickness of the straight rod portion (401); the concave surface of the first bending portion serves as a sliding magnetic pole The second bending portion is provided with a side end surface as an attraction magnetic pole surface (305), and the sliding magnetic pole surface (304) and the attraction magnetic pole surface (305) located on the same side constitute two intersecting magnetic pole surfaces; a magnetic conductive plastic upper cover (306) is arranged in front of the sliding magnetic pole surface (304), and there is a distance between the magnetic conductive plastic upper cover (306) and the sliding magnetic pole surface (304) to form a groove for facilitating the embedding of the straight rod portion (401), and a magnetic conductive elastic member (307) for contacting the straight rod portion (401) is arranged in the groove; After assembly, the shaft hole portion (402) is rotatably mounted on the rotating shaft, one end of the spring is fixed on the spring positioning column (406), and the other end of the spring is fixedly connected to a corresponding point on the side wall of the electromagnet skeleton (2); the magnetic pole surface sliding contact portion (404) is tightly embedded in a groove formed by the sliding magnetic pole surface (304), the magnetic conductive plastic upper cover (306) and the magnetic conductive elastic member (307), and the magnetic pole surface suction contact portion (405) is laterally aligned with the suction magnetic pole surface (305); when the magnetic pole surface suction contact portion (405) contacts the suction magnetic pole surface (305), the magnetic pole surface suction contact portion (405) is in contact with the suction magnetic pole surface (305). In this case, the three sides of the magnetic pole surface sliding contact portion (404) are respectively in contact with the sliding magnetic pole surface (304), the magnetic plastic upper cover (306) and the magnetic elastic member (307), so that the sliding magnetic pole surface (304), the magnetic pole surface sliding contact portion (404), the straight rod portion (401), the magnetic pole surface suction contact portion (405) and the suction magnetic pole surface (305) constitute the closed magnetic circuit; the shaft hole portion (402) is located outside the closed magnetic circuit and does not participate in the magnetic conductive path of the closed magnetic circuit; the matching points of the two pairs of the armature hooks and the corresponding pair of the vertical hooks are at the same position height.

9. The high-density needle selection device based on the double-layer pulley block groove plate according to claim 1, characterized in that: The pulley block comprises two mounting plates (701), two pulleys (702), two ball bearings (703), two pulley shafts (704), a bracket pressing protrusion (705) and a bracket pressing hole (706); the two pulleys (702) are respectively arranged at the upper and lower ends of a pulley bracket formed by splicing two mounting plates (701) through a corresponding pair of ball bearings (703) and the pulley shaft (704); the widths of the two mounting plates (701) are both smaller than the diameters of the pulleys (702); the thicknesses of the two mounting plates (701) are equal, so as to serve as positioning slide blocks when the pulley block moves in the pulley groove section of the upper pulley block or the pulley groove section of the lower pulley block.

10. A high-density needle selection device assembly, characterized in that: A 16-needle high-density needle selection device assembly is formed by stacking 8 high-density needle selection devices based on a double-layer pulley block groove plate as described in any one of claims 1 to 9.

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