Multi-position large-stroke needle selection device, high-density assembly of multi-position large-stroke needle selection device and electronic jacquard machine

Abstract

The invention discloses a multi-position large-stroke needle selection device, a high-density assembly thereof and an electronic jacquard machine. The multi-position large-stroke needle selection device comprises a substrate and a spacer which are spliced front and back, a pair of vertical hooks and a group of thin lifting pulley blocks are arranged on groove plates on the front surface and the back surface of the substrate; upper pulley lines of the two groups of lifting pulley blocks are respectively connected with the two pairs of vertical hooks; the top of the substrate is provided with two electromagnets which are stacked up and down, and two sides of the two electromagnets are respectively provided with a pair of armature hooks; a connecting pulley is arranged at the bottom of the substrate, and one ends of lower pulley lines of two or more adjacent groups of thin lifting pulley blocks are connected after smooth transition routing through the lower edge of the connecting pulley in a positive oblique line or negative oblique line mode, so that the lower pulley lines of the two or more groups of thin lifting pulley blocks are connected in series, and first line output has three or more positions; the large-stroke opening device can be used for large-stroke opening of three-dimensional multi-layer fabrics, and has practical application significance for three-dimensional weaving of special multi-shed fabrics and composite materials.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic jacquard machines of textile machinery, and in particular relates to a multi-position large-range needle selection device and a high-density component thereof, and an electronic jacquard machine. Background Art

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

[0003] In the needle selection device, one end of the armature is made into a hook shape, called the 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 area of ​​the projection surface 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 projection area; the needle lifting density of the jacquard machine is: the ratio of the number of needle lifting of the jacquard machine to its projection area. Obviously, jacquard machines with the same number of needles have a smaller volume with a higher density.

[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 The projected area is about 5714 needles per square meter and 0.57 needles per square centimeter. When using this needle selection device to make a jacquard machine, the projected 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. The jacquard faucet is too large and difficult to assemble, and the building frame needs to be raised. This is the bottleneck that restricts the development of jacquard machines with large needle counts. If there is a multi-position large-range needle selection device, such as doubling the needle density of the needle selection device, it will not be difficult to make a faucet with 10,000 or even more than 10,000 needles.

[0007] For carpet jacquard, a three-position needle selection device is needed to form the double shed required by the double-layer carpet loom. Currently, there is a solution in the prior art, which is to use two two-position needle selection devices in series to form a three-position needle selection device, and two needles become one needle. In this way, for carpet jacquard, the needle selection density is lower.

[0008] 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 open jacquard machine", application number: 0723041 (hereinafter referred to as prior patent 2), both use the scheme of two electromagnets stacked up and down.

[0009] Among them, the solution of the prior patent 2 requires the jacquard machine to have two sets of upper and lower knives, and there are problems with the electromagnet being large in size and power consumption, which is not compact enough, and this solution cannot produce a multi-position solution with more than three positions. The prior patent 1 proposes a solution of using two electromagnets to control a "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.

[0010] The solution of the prior patent 1 cannot directly produce a three-position opening, and must be produced through the action of the complex pulley group connected to the "hook pair". Since the "hook pair" is two hooks that move in association, which is different from two independently moving vertical hooks, the solution of the prior patent 1 cannot replace 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, and it cannot produce a multi-position opening solution or a large-range opening solution with more than three positions. Summary of the invention

[0011] In order to make up for the deficiencies of the above-mentioned prior art, the present invention provides a multi-position large-range needle selection device and a high-density component thereof, and an electronic jacquard machine.

[0012] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions: A multi-position large-stroke needle selection device comprises at least one substrate and a spacer covering the front and back sides of the substrate, wherein the front groove of the substrate and the back groove of the spacer on the corresponding side and the back groove of the substrate and the front groove of the spacer on the corresponding side can both constitute a pulley block groove plate, and a pair of vertical hooks and a group of thin lifting pulley blocks are slidably arranged in the front and rear pulley block groove plates, and the front and rear pairs of vertical hooks respectively drive the corresponding group of thin lifting pulley blocks through the corresponding upper pulley lines to realize the up and down movement. Sliding; two electromagnets stacked up and down are arranged on the top of the substrate through the electromagnet frame, and the two electromagnets have two upper and lower intersecting magnetic pole surfaces, and can cooperate with a corresponding pair of armature hooks to form a closed magnetic circuit; the two pairs of armature hooks are respectively located on the left and right sides of the two electromagnets, and the shaft holes of the two pairs of armature hooks are respectively rotatably connected with the corresponding rotating shafts on the front and back surfaces of the top of the substrate, and the rear side surfaces of the hook tips of the two pairs of armature hooks are elastically connected to the left and right sides of the electromagnet frame through a pair of springs; located at The vertical hook, the thin lifting pulley group, the electromagnet, the armature hook and the spring on the same side of the substrate constitute a needle selection unit; when the electromagnet is energized, the corresponding armature hook is maintained in the closed magnetic circuit position, and the hook tip of the armature hook does not contact the hook tip of the corresponding vertical hook, and is in a decoupled state; when the electromagnet is not energized, the corresponding armature hook leaves the closed magnetic circuit position under the action of the corresponding spring, and the hook tip of the armature hook contacts the hook tip of the vertical hook, and is in a hooked state; the bottom of the substrate is connected to the bottom of the substrate. A connecting pulley is provided through the gasket. When n needle selection units are alternately superimposed through the base plate and the spacer, n is a positive integer, and one end of the lower pulley line of two adjacent groups of the thin lifting pulley groups is connected after smooth transition through the lower edge of the corresponding connecting pulley in a forward slash or reverse slash manner to form a lower pulley line shared by n thin lifting pulley groups. One end of the shared lower pulley line is fixed, and the other end is connected to the first line connector output, so that multi-position first line output of n+1 positions can be realized, specifically: When the n thin lifting pulley blocks are all in the high position, the first line output position is in the first working position; When one of the n thin lifting pulleys is in the low position and n-1 is in the high position, the first line output position is in the second working position; When 2 of the n thin lifting pulley blocks are located at the low position and n-2 are located at the high position, the first line output position is at the third working position; By analogy, when all of the n thin lifting pulley groups are in the low position, the first line output position is at the n+1th working position; The first working position is the highest position of the first line output, and the n+1th working position is the lowest position of the first line output. The height from the first working position to the n+1th working position gradually decreases, and the height difference between two adjacent working positions corresponds to a movement stroke of the jacquard machine knife.

[0013] Furthermore, the connecting pulley is installed in the interlayer between the two extension pieces at an angle to the left or right, so as to bridge the front and rear two sets of the thin lifting pulley groups, so that one end of the lower pulley line of the front and rear two sets of the thin lifting pulley groups can smoothly access the lower edge of the connecting pulley from the front and rear sides and connect with each other; The upper parts of the two extension sheets are provided with fixing holes, and the two extension sheets are fixedly assembled by the cooperation of the corresponding fasteners with the two fixing holes; the top ends of the two extension sheets after assembly are fixedly connected to the bottom ends of the base sheet, and the bottom ends of the two extension sheets after assembly are fixedly connected to the top ends of the gaskets; the inclination direction of the connecting pulley is determined by the inclination direction of the connecting pulley mounting surface in the interlayer between the two extension sheets; When the connecting pulley installation surface is tilted to the right, the longitudinal section of the interlayer between the two extension pieces is in a Z-shaped structure. At this time, the connecting pulley is tilted to the right, and is used to connect the left end of the lower pulley line of the previous thin lifting pulley group with the right end of the lower pulley line of the next thin lifting pulley group, that is, to connect in a forward oblique line manner; When the connecting pulley mounting surface is tilted to the left, the longitudinal section of the sandwich between the two extension pieces is in an inverted Z-shaped structure. At this time, the connecting pulley is tilted to the left, and is used to connect the right end of the lower pulley line of the previous thin lifting pulley group with the left end of the lower pulley line of the next thin lifting pulley group, that is, connected in an inverted oblique manner.

[0014] Further, the front groove type of the substrate includes an A-side pulley block slide groove located in the middle and fully linear A-side vertical hook guide rails located on the left and right sides; the back groove type of the substrate includes a B-side pulley block slide groove located in the middle and fully linear B-side vertical hook guide rails located on the left and right sides; the A-side pulley block slide groove has the same structure as the B-side pulley block slide groove, and the A-side vertical hook guide rail has the same structure as the B-side vertical hook guide rail; The front groove and back groove of the spacer have the same structure, and are matched with the front groove and back groove of the substrate respectively; the A-side pulley block slide and the A-side vertical hook guide cooperate with the back groove of the spacer to realize the installation of the thin lifting pulley block and the vertical hook in the pulley block groove plate on the front side; the B-side pulley block slide and the B-side vertical hook guide cooperate with the front groove of another spacer to realize the installation of the thin lifting pulley block and the vertical hook in the pulley block groove plate on the rear side.

[0015] 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 lifting pulley blocks are respectively a first thin lifting pulley block and a second thin lifting 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; The structure located on the front side of the substrate is that a pair of the first vertical hooks can be slidably arranged in the A-surface vertical hook guide rails on the left and right sides respectively, and the first thin lifting pulley group can be slidably arranged in the A-surface pulley group slide groove. The two ends of the upper pulley line of the first thin lifting pulley group are respectively connected to the bottom ends of the pair of the first vertical hooks, and the two ends of the lower pulley line of the first thin lifting pulley group are respectively connected to the first line joint and the connecting pulley; the first vertical hook drives the first thin lifting pulley group to rise and fall in the A-surface pulley group slide groove as the knife is lifted in the A-surface vertical hook guide; the lower electromagnet is fixedly installed at the lower end of the electromagnet skeleton, a pair of the lower armature hooks are respectively located on the left and right sides of the lower electromagnet, and a pair of the lower armature hooks are located on the inner sides of the pair of first vertical hooks, the axial hole portions of the pair of the lower armature hooks are rotatably connected to the corresponding points on the front side of the top spacer through a corresponding pair of first rotating shafts, and the rear sides of the hook tips of the pair of the lower armature hooks are respectively connected to the electromagnet through a pair of first springs. The corresponding points on the left and right sides of the lower part of the skeleton are elastically connected, and the intersecting magnetic pole surfaces of the lower electromagnet can cooperate with the two side surfaces of a pair of the lower 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 portion of the lower armature hook are both on the same side of the first rotating shaft; when the lower electromagnet is energized, the lower armature hook moves laterally from the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the lower electromagnet to the front closed magnetic circuit position that fits the corresponding magnetic pole of the lower electromagnet and remains there, at which time the hook tip of the lower armature hook does not contact the hook tip of the first vertical hook and is in a dehooking state; when the lower electromagnet is not energized, the lower armature hook moves laterally from the front closed magnetic circuit position that fits the corresponding magnetic pole of the lower electromagnet to the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the lower electromagnet under the action of the first spring, at which time the hook tip of the lower armature hook hooks the hook tip of the first vertical hook in a lifting manner and is in a hooking state; The structure located on the back side of the substrate is that a pair of second vertical hooks can be slidably arranged in the B-side vertical hook guide rails on the left and right sides respectively, and the second thin lifting pulley group can be slidably arranged in the B-side pulley group slide groove. The two ends of the upper pulley line of the second thin lifting pulley group are respectively connected to the bottom ends of the pair of second vertical hooks, and the two ends of the lower pulley line of the second thin lifting pulley group are respectively connected to the first line joint and the connecting pulley; the second vertical hook drives the second thin lifting pulley group to rise and fall in the B-side pulley group slide groove as the knife is lifted in the B-side vertical hook guide; the upper electromagnet is fixedly installed on the upper end of the electromagnet skeleton, 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 the pair of second vertical hooks, the axial hole portions of the pair of upper armature hooks are rotatably connected to the corresponding points on the rear side of the top spacer through a corresponding pair of second rotating shafts, and the rear sides of the hook tips of the pair of upper armature hooks are respectively connected to the electromagnet through a pair of second springs. The corresponding points on the left and right sides of the upper part of the iron skeleton are elastically connected, and the intersecting magnetic pole surfaces of the upper electromagnet can cooperate with the two side surfaces of a pair of upper 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 portion of the upper armature hook are on the same side of the second rotating shaft; when the upper electromagnet is energized, the upper armature hook moves laterally from the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the upper electromagnet to the back closed magnetic circuit position that fits the corresponding magnetic pole of the upper electromagnet and remains there, at which time the hook tip of the upper armature hook does not contact the hook tip of the second vertical hook and is in a dehooking state; when the upper electromagnet is not energized, the upper armature hook moves laterally from the back closed magnetic circuit position that fits the corresponding magnetic pole of the upper electromagnet to the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the upper electromagnet under the action of the second spring, at which time the hook tip of the upper armature hook hooks the hook tip of the second vertical hook in a lifting manner, in a hooking state.

[0016] 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 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 can, when the vertical hook moves upward, laterally push the armature hook on the corresponding side from a static magnetic gap position away from the direction of the electromagnet to a dynamic magnetic gap position close to the direction of the electromagnet and keep it in the dynamic magnetic gap position, 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. The sliding section is an inclined curve starting from the bottom of the hook of the top hook part, the holding section is a straight line parallel to the moving direction of the rod-shaped body, and the sliding section is smoothly connected with the holding section; the distance from the bottom of the holding section to the bottom of the hook of the top hook part is greater than the distance from the hook tip of the top hook part to the bottom of the hook of the top hook part; the length of the holding section of the convex edge corresponds to the tolerance range of the jacquard machine knife lifting height allowed by the needle selection device to which it belongs; 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 corresponding groove type of the first substrate and ensuring that the vertical hook does not produce lateral displacement, and the top end of the limiting convex edge is connected to the bottom end of the convex edge holding section in a parallel straight line; 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.

[0017] 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; the hook tip portion and the magnetic pole surface suction contact portion are both on the same side of the rotating shaft; 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; 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.

[0018] The two wheels are connected to each other with a pair of cams, and the two wheels are connected with each other with a pair of cams, and the cams are connected with each other with a pair of cams. The width of the vertical plate is smaller than the diameter of the thin pulley, and a buffering and shock-absorbing structure is provided in the middle of the vertical plate by means of a groove; the width of the middle horizontal plate is slightly larger than the diameter of the thin pulley, and the left and right ends of the middle horizontal plate have the same thickness, so as to serve as a positioning slider when the thin pulley block moves in the pulley block slide groove; the widths of the upper horizontal plate and the lower horizontal plate are equal, and the widths of the upper horizontal plate and the lower horizontal plate are both smaller than the width of the middle horizontal plate, and larger than the width of the vertical plate; The sliding bearing assembly includes a journal and a sleeve, wherein the journal is arranged on the axis of the thin pulley, and the sleeves are respectively arranged on the vertical plates on the front and rear sides; the journal and the sleeve are made of metal materials with similar hardness, wherein the hardness rate of the sleeve is greater than the hardness of the journal; an oil storage tank is provided on the journal, and a sealing cover for covering the oil storage tank is provided on the outer periphery of the sleeve.

[0019] Furthermore, a heat sink for dissipating heat for the coil of the electromagnet and having an electromagnetic shielding function is provided on the top of the partition; the heat sink is attached to the side of the partition close to the electromagnet, and its position corresponds to the position of the electromagnet. The heat sink is made of a non-magnetic metal material including copper, aluminum or copper-aluminum alloy that has an electromagnetic shielding function. At least one surface of the heat sink is exposed and in good contact with the metal body to conduct heat and electricity to the outside, and two adjacent heat sinks are also in good contact with each other to maintain heat and electricity conduction.

[0020] A high-density component for a multi-position large-range needle selection device is an 8-needle multi-position large-range needle selection device component formed by stacking the above-mentioned multi-position large-range needle selection device or by mixed stacking of multiple positions and standard two positions.

[0021] An electronic jacquard machine is provided with the above-mentioned multi-position large-range needle selection device high-density component.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The present invention adds an inclined connecting pulley at the bottom of the substrate, and connects one end of the lower pulley line of at least two groups of lifting pulley groups in series after smoothly routing through the lower edge of the connecting pulley in a forward or reverse oblique line manner, thereby realizing multi-position jacquard opening of more than 3 positions, which has practical application significance for special multi-shed fabrics and three-dimensional weaving of composite materials.

[0023] The thin lifting pulley block of the present invention uses high-strength wear-resistant material, and its thickness is only one-half of the thickness of the original existing pulley block. It can not only meet the needs of arranging two lifting pulley blocks in one substrate, but also can enhance the structural stability of the support frame of the pulley block when the vertical plate of the pulley block is thinned, and change the force on the end of the cantilever beam fixed at one end to the force on the middle part fixed at both ends, thereby solving the "support" problem when the pulley shaft is under force and solving the manufacturing difficulty of the ultra-thin lifting pulley block.

[0024] The present invention optimizes and improves the hook unhooking technology, and adopts the full-range linear vertical hook guide rail and the vertical hook convex edge design to form a new hook unhooking technology. This technology can design a larger hook so that there is no need to worry about the difficulty of unhooking the large hook, and sufficient design margin can ensure the action reliability 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 0~0.3mm can be achieved. In addition, the distance from the holding section of the vertical hook convex edge to the hook bottom is greater than the distance from the hook tip to the hook bottom. This distance difference is also the distance from the armature hook tip to the vertical hook tip, thereby leaving a hook unhooking margin, which is also a tolerance margin, can prevent misoperation and improve reliability. The retaining section of the convex edge enables the lifting knife to reach the vertical hook switching height (switching from hanging to unhooking) required by the needle selection device within a wide range, and has a wide lifting knife height tolerance range (tolerance margin), which reduces the manufacturing difficulty of the jacquard machine host and improves the action reliability of the whole machine. 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.

[0025] 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.

[0026] 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

[0027] 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: Figure 1 An exploded view of an embodiment of a multi-position large-range needle selection device of the present invention; Figure 2 It is a three-dimensional diagram of a thin lifting pulley block in the multi-position large-range needle selection device of the present invention; Figure 3 It is an exploded view of a thin lifting pulley block in the multi-position large-range needle selection device of the present invention; Figure 4 It is a structural diagram of a vertical hook embodiment in the multi-position large-range needle selection device of the present invention; Figure 5 It is a structural diagram of another embodiment of a vertical hook in the multi-position large-range needle selection device of the present invention; Figure 6 It is a schematic diagram of the structure of the A-side magnetic circuit structure and its vertical hook of the multi-position large-range needle selection device of the present invention; Figure 7 It is a schematic diagram of the structure of the magnetic circuit structure of the B surface and the vertical hook of the multi-position large-range needle selection device of the present invention; Figure 8 It is a schematic structural diagram of the I-shaped iron core and the armature hook of the multi-position large-range needle selection device of the present invention when forming a closed magnetic circuit; Fig. 9 It is a schematic structural diagram of the double electromagnets and the electromagnet frame of the multi-position large-range needle selection device of the present invention after being assembled; Fig.10 It is a structural schematic diagram of the spacer and the heat sink of the multi-position large-range needle selection device of the present invention; Fig.11 It is a structural schematic diagram of the connecting pulley and its extension piece of the multi-position large-range needle selection device of the present invention; Fig.12 It is a schematic diagram of the working principle of the first line three positions of the multi-position large-range needle selection device of the present invention; Fig.13 Schematic diagram of large opening range of three-dimensional multi-layer thick fabric Fig.14 It is a schematic diagram of the working principle of the first line four positions of the multi-position large-range needle selection device of the present invention; Fig.15 It is a stereoscopic view of the 8-needle multi-position large-range needle selection device assembly of the present invention. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1 As shown, a multi-position large-stroke needle selection device includes at least one substrate 1, a spacer 2 covering the front and back sides of the substrate 1, and a connecting pulley 15 arranged at the bottom end of the substrate 1 through a gasket 21.

[0030] The front groove type of the substrate 1 includes an A-side pulley block slide groove located in the middle and a fully linear A-side vertical hook guide rail located on the left and right sides. The back groove type of the substrate 1 includes a B-side pulley block slide groove located in the middle and a fully linear B-side vertical hook guide rail located on the left and right sides. The A-side pulley block slide groove has the same structure as the B-side pulley block slide groove, and the A-side vertical hook guide rail has the same structure as the B-side vertical hook guide rail.

[0031] The front groove type and the back groove type of the spacer 2 have the same structure and are matched with the front groove type and the back groove type of the substrate 1 respectively. The front groove type of the substrate 1 and the back groove type of the spacer 2 on the corresponding side constitute a pulley block groove plate. The back groove type of the substrate 1 and the front groove type of the spacer 2 on the corresponding side also constitute a pulley block groove plate.

[0032] With the cooperation of the groove on the back side of the spacer 2, a pair of first vertical hooks 6a are slidably arranged in the A-side vertical hook guide rail, and a group of first thin lifting pulley groups 7a are slidably arranged in the A-side pulley group slide groove. The two ends of the upper pulley line of the first thin lifting pulley group 7a are respectively connected to the bottom ends of the pair of first vertical hooks 6a, and the two ends of the lower pulley line of the first thin lifting pulley group 7a are respectively connected to the head line joint 20 and the connecting pulley 15. The first vertical hook 6a slides up and down in the A-side vertical hook guide rail as the knife is lifted and lowered, and then drives the first thin lifting pulley group 7a to slide up and down in the A-side pulley group slide groove through the corresponding upper pulley line.

[0033] Under the cooperation of the front groove type of another spacer 2, a pair of second vertical hooks 6b are slidably arranged up and down in the B-side vertical hook guide rail, and a set of second thin lifting pulley groups 7b are slidably arranged up and down in the B-side pulley group chute. Both ends of the upper pulley wire of the second thin lifting pulley group 7b are respectively connected to the bottom ends of a pair of the second vertical hooks 6b, and both ends of the lower pulley wire of the second thin lifting pulley group 7b are respectively connected to the head wire joint 20 and the connecting pulley 15. The second vertical hook 6b slides up and down in the B-side vertical hook guide rail along with the lifting of the cutting tool, and then drives the second thin lifting pulley group 7b to slide up and down in the B-side pulley group chute through the corresponding upper pulley wire.

[0034] See Figure 2 and Figure 3 As shown, the first thin lifting pulley group 7a and the second thin lifting pulley group 7b have the same structure, and both include two vertical plates 701, two upper cross plates 702, two middle cross plates 703, two lower cross plates 704 and two thin pulleys 705. The vertical plates 701, the upper cross plates 702, the middle cross plates 703 and the lower cross plates 704 are all formed by plastic materials, or the vertical plates 701 are made of metal materials, and the upper cross plates 702, the middle cross plates 703 and the lower cross plates 704 are made of plastic materials and are injection-molded with the vertical plates 701. The combination of metal parts and injection-molded parts is adopted, which is convenient for mass production and quality control.

[0035] Among them, the two upper cross plates 702 are joined together face to face to form an upper layer fixing plate, the two middle cross plates 703 are joined together face to face to form a middle layer fixing plate, and the two lower cross plates 704 are joined together face to face to form a lower layer fixing plate. The upper layer fixing plate, the middle layer fixing plate and the lower layer fixing plate form a "king" shaped bracket under the front and back clamping of the two vertical plates 701. This "king" shaped bracket has three mechanical support points, so the stress condition at the shaft end can be effectively improved. At the same time, a buffer and shock absorption structure 706 is arranged in the middle of the vertical plate 701 by grooving, so as to buffer the vibration and impact during the operation of the mechanism and extend the working life of the thin lifting pulley group.

[0036] The front and rear vertical plates 701 are both provided with mounting holes 712, and all the upper horizontal plates 702, the middle horizontal plates 703 and the lower horizontal plates 704 are all provided with mounting blocks 711. The upper horizontal plates 702, the middle horizontal plates 703 and the lower horizontal plates 704 are respectively fixedly mounted on the vertical plates 701 on the same side by the cooperation of the respective mounting blocks 711 and the corresponding mounting holes 712. The two middle horizontal plates 703 are divided into a pair of male plates and female plates, the male plates are provided with pressing blocks 709, and the female plates are provided with pressing holes 710. The male plates and the female plates are pressed and fixed by the cooperation of the pressing blocks 709 and the pressing holes 710.

[0037] There is a pulley installation gap between the two vertical plates 701 under the support of the upper fixed plate, the middle fixed plate and the lower fixed plate. The pulley installation gap forms an upper pulley installation gap position and a lower pulley installation gap position in the area between the upper fixed plate and the middle fixed plate and in the area between the middle fixed plate and the lower fixed plate. The two thin pulleys 705 are respectively freely rotatably installed at the upper pulley installation gap position and the lower pulley installation gap position through corresponding sliding bearing assemblies. The pulley installation gap should be slightly larger than the thickness of the thin pulley 705 so as to meet the rotation requirements of the thin pulley 705.

[0038] The width of the vertical plate 701 is smaller than the diameter of the thin pulley 705, the width of the middle horizontal plate 703 is slightly larger than the diameter of the thin pulley 705, and the left and right ends of the middle horizontal plate 703 have the same thickness, so as to serve as positioning sliders 707 when the thin lifting pulley block moves in the pulley block slideway. The widths of the upper horizontal plate 702 and the lower horizontal plate 704 are equal, and the widths of the upper horizontal plate 702 and the lower horizontal plate 704 are both smaller than the width of the middle horizontal plate 703 and larger than the width of the vertical plate 701.

[0039] The sliding bearing assembly includes a journal 713 and a sleeve 714. The journal 713 is arranged on the axis of the thin pulley 705, and the sleeves 714 are respectively arranged on the vertical plates 701 at the front and rear sides. An oil storage tank 715 is provided on the journal 713, and a sealing cover 708 for covering the oil storage tank is provided on the outer periphery of the sleeve 714. The journal 713 and the sleeve 714 are made of metal materials with similar hardness, wherein the hardness rate of the sleeve 714 is greater than the hardness of the journal 713. The metal sliding bearing solution is more suitable for ultra-thin pulley blocks and has lower cost.

[0040] from Figure 1It can be clearly seen that during installation, the two sets of the thin lifting pulley groups can be placed in the substrate 1 in a front-to-back stack, and the two sets of the thin lifting pulley groups can be slid up and down in the A-side pulley group slide groove or the B-side pulley group slide groove through their respective corresponding positioning sliders 707.

[0041] It should be emphasized that the thickness of the thin lifting pulley block of the present invention is only half of the thickness of the existing pulley block. Therefore, considering the material strength, the thin lifting pulley block of the present invention should use high-strength wear-resistant materials. As the pulley groove becomes narrower, the pulley wire rope used accordingly should also be a thin rope, the thickness of which is adapted to the pulley groove.

[0042] By adopting the above-mentioned design of thin lifting pulley block, the structural stability of the support frame of the pulley block can be enhanced when the vertical plate of the pulley block is thinned, and the force on the end of the cantilever beam fixed at one end is changed to the force on the middle part fixed at both ends, which solves the "support" problem when the pulley shaft is under force and solves the manufacturing difficulty of the ultra-thin lifting pulley block.

[0043] See also Figure 4 and Figure 5 As shown, the first vertical hook 6a and the second vertical hook 6b have the same structure, both comprising a rod-shaped body 601, a side ear portion 602 for hooking with the blade of a knife is provided in the middle of the outer side of the rod-shaped body 601, 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.

[0044] 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. When the vertical hook moves upward, the convex edge can laterally push the armature hook on the corresponding side from the static magnetic gap position away from the electromagnet direction to the dynamic magnetic gap position close to the electromagnet direction and keep it at the dynamic magnetic gap 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 hook bottom 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's upward movement, the pushing section 604a can generate an outward lateral thrust on the armature hook in contact therewith, and in the middle and late stages of the vertical hook's upward movement, the retaining section 604b can exert a retaining force on the armature hook that has generated a lateral displacement.

[0045] 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 4 As shown, Figure 4 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.

[0046] 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 0~0.3mm.

[0047] In the actual operation of the jacquard machine, due to the transmission mechanism and mechanical stress, there are errors in the position of the blades of multiple blades; the blade is up to 2 meters long (the blade of a jacquard machine with a large needle number 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. Therefore, there is a concept of "blade lifting tolerance", which refers to the range of 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.

[0048] The middle and lower parts of the inner side of the rod-shaped body 601 are provided with a limiting convex edge 605 along its edge for engaging with the corresponding groove of the first substrate 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 the 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.

[0049] 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 4 The single slot method shown can also be designed as Figure 5 Double slot method shown.

[0050] See also Figure 1 As shown, the top of the substrate 1 is provided with two electromagnets stacked up and down through an electromagnet skeleton 9, and the two electromagnets have two upper and lower intersecting magnetic pole surfaces, and can cooperate with a corresponding pair of armature hooks to form a closed magnetic circuit. The two pairs of armature hooks are respectively located on the left and right sides of the two electromagnets, and the shaft holes of the two pairs of armature hooks are respectively rotatably connected to the corresponding rotating shafts on the front and back surfaces of the top of the substrate 1, and the rear side surfaces of the hook tips of the two pairs of armature hooks are elastically connected to the left and right sides of the electromagnet skeleton 9 through a pair of springs.

[0051] The two electromagnets stacked up and down are respectively an upper electromagnet 3b and a lower electromagnet 3a with symmetrical structures. The two pairs of armature hooks are respectively an upper armature hook 4b and a lower armature hook 4a 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.

[0052] See also Figure 6As shown, the electromagnetic structure located on the front side of the substrate 1 is that the lower electromagnet 3a is fixedly installed at the lower end of the electromagnet skeleton 9, a pair of the lower armature hooks 4a are respectively located on the left and right sides of the lower electromagnet 3a, and a pair of the lower armature hooks 4a are located on the inner side of a pair of first vertical hooks 6a, the axial hole portions of a pair of the lower armature hooks 4a are rotatably connected with the corresponding points on the front side of the top partition through a corresponding pair of first rotating shafts 8a, the rear sides of the hook tips of a pair of the lower armature hooks 4a are elastically connected with the corresponding points on the left and right sides of the lower part of the electromagnet skeleton 9 through a pair of first springs 5a, the intersecting magnetic pole surfaces of the lower electromagnet 3a can cooperate with the two side surfaces of a pair of the lower 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 portion of the lower armature hook 4a are both on the same side of the first rotating shaft 8a.

[0053] When the lower electromagnet 3a is energized, the lower armature hook 4a is attracted by the lower electromagnet 3a and moves laterally from the dynamic magnetic gap position close to the magnetic pole direction of the lower electromagnet 3a to the front closed magnetic circuit position that matches the magnetic pole of the lower electromagnet 3a and is maintained. At this time, the hook tip of the lower armature hook 4a does not contact the hook tip of the first vertical hook 6a, and is in a dehooking state. When the lower electromagnet 3a is not energized, the lower armature hook 4a is moved laterally from the front closed magnetic circuit position that matches the magnetic pole of the lower electromagnet 3a to the dynamic magnetic gap position close to the magnetic pole direction of the lower electromagnet 3a under the action of the first spring 5a. At this time, the hook tip of the lower armature hook 4a hooks the hook tip of the first vertical hook 6a in a lifting manner, and is in a hooking state.

[0054] See also Figure 7 As shown, the electromagnetic structure located on the back side of the substrate 1 is that the upper electromagnet 3b is fixedly installed on the upper end of the electromagnet skeleton 9, a pair of the upper armature hooks 4b are respectively located on the left and right sides of the upper electromagnet 3b, and a pair of the upper armature hooks 4b are located on the inner side of a pair of second vertical hooks 6b, the axial hole portions of a pair of the upper armature hooks 4b are rotatably connected with the corresponding points on the rear side surface of the top partition through a corresponding pair of second rotating shafts 8b, and the rear side surfaces of the hook tips of a pair of the upper armature hooks 4b are elastically connected with the corresponding points on the left and right sides of the upper part of the electromagnet skeleton 9 through a pair of second springs 5b, respectively, the intersecting magnetic pole surfaces of the upper electromagnet 3b can cooperate with the two side surfaces of a pair of the upper 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 portion of the upper armature hook 4b are both on the same side of the second rotating shaft 8b.

[0055] When the upper electromagnet 3b is energized, the upper armature hook 4b is attracted by the upper electromagnet 3b and moves laterally from the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the upper electromagnet 3b to the back closed magnetic circuit position that fits the corresponding magnetic pole of the upper electromagnet 3b and maintains it. At this time, the hook tip of the upper armature hook 4b does not contact the hook tip of the second vertical hook 6b, and is in a decoupled state; when the upper electromagnet 3b is not energized, the upper armature hook 4b is moved laterally from the back closed magnetic circuit position that fits the corresponding magnetic pole of the upper electromagnet 3b to the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the upper electromagnet 3b under the action of the second spring 5b. At this time, the hook tip of the upper armature hook 4b hooks the hook tip of the second vertical hook 6b in a lifting manner, and is in a hooked state.

[0056] See also Figure 8 As shown, the lower electromagnet 3a and the upper 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 3b is on the top and the short magnetic pole 303 is on the bottom, while the long magnetic pole 302 of the lower electromagnet 3a is on the bottom and the short magnetic pole 303 is on the top. Figure 8 It can be clearly seen that the left and right ends of the long magnetic pole 302 have a first bending portion that bends backward, and the left and right ends of the short magnetic pole 303 have a second bending portion that bends forward, and the first bending portion and the second bending portion are in a front-to-back misalignment form, and the misalignment amplitude is equal to the thickness of the armature hook. 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.

[0057] The concave surface of the first bending portion is used as the sliding magnetic pole surface 304, and the side end surface of the second bending portion is used as the attracting magnetic pole surface 305. The sliding magnetic pole surface 304 and the attracting magnetic pole surface 305 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. There is a gap between the magnetic conductive plastic upper cover 306 and the sliding magnetic pole surface 304 to form a groove for the straight rod 401 to be embedded, and a magnetic conductive elastic member 307 for contacting the straight rod 401 is arranged in the groove.

[0058] See also Figure 8As shown, the structures of the lower armature hook 4a and the upper armature hook 4b are mostly the same, and both include 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, but not limited to a rectangle. 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, and 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. The spring positioning column 406 is arranged on the side wall of the straight rod portion 401 facing the electromagnet. The hook tip portion 403 and the magnetic pole surface suction contact portion 405 are both on the same side of the corresponding rotating shaft.

[0059] See also Figure 6 and Figure 7 As shown, the difference is that the shaft hole portion 402 of the lower armature hook 4a 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 4b 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 4a is designed as a "lifting hook" structure, while the hook tip portion 403 of the upper armature hook 4b is designed as a "lifting hook" structure.

[0060] It is precisely because of the symmetrical design of the upper electromagnet 3b and the lower electromagnet 3a, and the different hook designs of the upper armature hook 4b and the lower armature hook 4a, that two pairs of vertical hooks of the same shape can be used in the vertical hook slot section of the upper pulley block and the vertical hook slot section of the lower pulley block, that is, a pair of first vertical hooks 6a and a pair of second vertical hooks 6b.

[0061] See also Fig. 9 As shown, a printed circuit board slot 19 is provided at the top of the electromagnet skeleton 9, 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 9. The first spring 5a and the second spring 5b are fixed to corresponding points on the left and right sides of the electromagnet skeleton 9 through the first spring mounting holes 13 and the second spring mounting holes 14, respectively.

[0062] See also Figure 1 and Fig.10As shown, a heat sink 16 for dissipating heat for the coil of the electromagnet and having an electromagnetic shielding function is provided on the top of the spacer 2. 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. At present, most coils are plastic-packaged, with poor thermal conductivity, and multiple coils are densely installed, which is not conducive to heat dissipation. The heat sink 16 is attached to the side of the top spacer of the spacer 2 close to the electromagnet, and its position corresponds to the position of the electromagnet, so that the heat sink 16 is close to the coil of the electromagnet and can conduct heat. The heat sink 16 is made of a non-magnetic and electromagnetically shielding metal material, such as copper, aluminum or other alloys. While conducting heat, it can provide both magnetic shielding and electrical shielding, and play a role in resisting electromagnetic interference. At least one surface of the heat sink 16 is exposed and in good contact with the metal body to conduct heat and electricity to the outside, and two adjacent heat sinks 16 are also in good contact with each other to maintain heat and electricity conduction.

[0063] See also Figure 6 and Figure 7 As shown, during assembly, the axial hole portion 402 of the upper armature hook 4b of the lower armature hook 4a is 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 lower armature hook 4a, and the other end is connected to the first spring mounting hole 13 on the electromagnet skeleton 9, one end of the second spring 5b is fixed on the spring positioning column 406 of the upper armature hook 4b, and the other end is connected to the second spring mounting hole 14 on the electromagnet skeleton 9.

[0064] See also Figure 8 As shown, after assembly, the magnetic pole surface sliding contact portion 404 of the upper armature hook 4b of the lower armature hook 4a is tightly 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 surfaces of the magnetic pole surface sliding contact portion 404 are in contact with the sliding magnetic pole surface 304, the magnetic conductive plastic upper cover 306 and the magnetic conductive 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 conduction path of the closed magnetic circuit.

[0065] After assembly, the matching surfaces of the hook tip 403 of the lower 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 upper 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.

[0066] 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.

[0067] 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.

[0068] from Figure 8 It can be 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-beam 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-beam 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-beam 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.

[0069] from Figure 8It 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.

[0070] The magnetic pole 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).

[0071] See also Figure 6 As shown, it can be clearly seen that the right side of the front magnetic circuit structure is in a decoupled state, and the lower armature hook 4a on the right side is in a state where it is pushed to the short magnetic pole position on the right side of the lower electromagnet 3a by the convex edge of the first vertical hook 6a on the right side, i.e., the dynamic magnetic gap position, 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 3a is energized to generate a relatively large electromagnetic force, which will attract the lower armature hook 4a on the right side to the short magnetic pole on the right side of the lower electromagnet 3a, i.e., the closed magnetic circuit position, and the first spring 5a on the right side is compressed at this time. As long as the coil of the lower electromagnet 3a is energized at this time, the suction force of the lower electromagnet 3a is greater than the elastic force of the first spring 5a on the right side, then when the first vertical hook 6a on the right side moves down, even without the convex edge of the first vertical hook 6a on the right side, the lower armature hook 4a on the right side will be sucked into the closed magnetic circuit position and maintained by the electromagnetic force. When the first vertical hook 6a on the right side continues to descend until its hook tip is opposite to the hook tip of the lower armature hook 4a on the right side, due to the existence of the unhooking margin, the first vertical hook 6a on the right side can be smoothly descended to the bottom of the lower armature hook 4a on the right side, and reliable unhooking is achieved. This is actually a new unhooking technology, which uses the unhooking margin parameters in the design stage to ensure the reliability of action under complex working conditions.

[0072] It is very important to limit the dynamic magnetic gap 17 to a relatively small range, such as 0~0.3mm. This is the key to the present invention and also a tolerance margin issue. In the case of a small magnetic gap, the electromagnet coil can generate sufficient attraction with less power consumption to attract the armature hook to the magnetic pole and maintain this state. It is not impossible to limit the dynamic magnetic gap 17 to 0.4mm, 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 0.2mm, 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 0.2mm means that the precision requirements for the parts are higher, which increases the cost.

[0073] See also Figure 6 As shown, it can be clearly seen that the left side of the front magnetic circuit structure is in a hook state. Under the action of the first spring 5a on the left side, the lower armature hook 4a on the left side is pushed to the short magnetic pole position away from the left side of the lower electromagnet 3a, that is, the static magnetic gap 18 position, and hooks the first vertical hook 6a on the left side to form a relatively large static magnetic gap 18. The lateral displacement of the lower armature hook 4a 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 3a. The vertical hook slide groove section of the upper pulley block is engaged with the convex edges on the two first vertical hook 6a rod bodies to ensure that the first vertical hook 6a has no lateral displacement when moving up and down.

[0074] See also Figure 7 As shown, it can be clearly seen that the right side of the back magnetic circuit structure is in a dehooking state, and the second vertical hook 6b on the right side pushes the upper armature hook 4b on the right side to the short magnetic pole end of the upper electromagnet 3b, which is in a dynamic magnetic gap position, and the second spring 5b on the right side is compressed. At this time, the coil of the upper electromagnet 3b is energized, and the suction force of the upper electromagnet 3b is greater than the elastic force of the second spring 5b on the right side. The upper armature hook 4b on the right side will be sucked into the closed magnetic circuit position and maintained at this position. If the second vertical hook 6b on the right side moves downward, dehooking can be achieved.

[0075] See also Figure 7As shown, it can be clearly seen that the left side of the back magnetic circuit structure is in a hook state, and the upper armature hook 4b on the left side moves in the direction away from the short magnetic pole of the upper electromagnet 3b under the action of the second spring 5b on the left side, to the static magnetic gap 18 position, and is in a hook state with the second vertical hook 6b on the left side. It can be seen that the shape of the upper armature hook 4b is different from that of the lower armature hook 4a, but the shape of the second vertical hook 6b is the same as that of the first vertical hook 6a. 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.

[0076] See also Fig.11 As shown, the connecting pulley 15 is installed in the interlayer between the two extension pieces 10 at an angle to the left or right, so as to bridge the first thin lifting pulley group 7a and the second thin lifting pulley group 7b, so that one end of the lower pulley line of the front and rear two sets of the thin lifting pulley groups can smoothly access and connect the lower edge of the connecting pulley 15 from the front and rear sides. The upper parts of the two extension pieces 10 are provided with fixing holes 22, and the two extension pieces 10 are fixedly spliced ​​by the cooperation of the corresponding fasteners and the two fixing holes 22.

[0077] See also Figure 1 As shown, the top ends of the two extension sheets 10 after being assembled are fixedly connected to the bottom end of the base sheet 1 , and the bottom ends of the two extension sheets 10 after being assembled are fixedly connected to the top end of the gasket 21 .

[0078] The inclination direction of the connecting pulley 15 is determined by the inclination direction of the connecting pulley mounting surface in the interlayer between the two extension pieces 10: When the connection pulley mounting surface is tilted to the right, the longitudinal section of the interlayer between the two extension pieces 10 is in a Z-shaped structure. At this time, the connection pulley 15 is tilted to the right, and is used to connect the left end of the lower pulley line of the first thin lifting pulley block 7a and the right end of the lower pulley line of the second thin lifting pulley block 7b, that is, the connection is in a forward oblique line manner; When the connecting pulley mounting surface is tilted to the left, the longitudinal section of the sandwich between the two extension pieces 10 is in an inverted Z-shaped structure. At this time, the connecting pulley 15 is tilted to the left, and is used to connect the right end of the lower pulley line of the first thin lifting pulley group 7a and the left end of the lower pulley line of the second thin lifting pulley group 7b, that is, connected in an inverted oblique manner.

[0079] The vertical hook, the thin lifting pulley block, the electromagnet, the armature hook and the spring of the same group constitute a needle selection unit. When n needle selection units are alternately superimposed by the substrate 1 and the spacer 2, n is a positive integer, and one end of the lower pulley line of two adjacent groups of the thin lifting pulley blocks is connected after smoothly transitioning through the lower edge of the corresponding connecting pulley 15 in a forward slash or reverse slash manner, forming a multi-position head line shared by all the thin lifting pulley blocks, and the two ends of the multi-position head line are respectively connected to the corresponding head line connectors.

[0080] The connecting pulley 15 and the multi-position head line enable all the thin lifting pulley groups to have n+1 working states during operation, specifically: When the n thin lifting pulley blocks are all in the high position, the first line output position is in the first working position; When one of the n thin lifting pulleys is in the low position and n-1 is in the high position, the first line output position is in the second working position; When 2 of the n thin lifting pulley blocks are located at the low position and n-2 are located at the high position, the first line output position is at the third working position; By analogy, when all of the n thin lifting pulley groups are in the low position, the first line output position is at the n+1th working position; The first working position is the highest position of the first line output, and the n+1th working position is the lowest position of the first line output. The height from the first working position to the n+1th working position gradually decreases, and the height difference between two adjacent working positions corresponds to a movement stroke of the jacquard machine knife.

[0081] See also Fig.12 As shown, Fig.12 An embodiment of connecting two needle selection units in series is shown. Fig.12 The three different working positions of the first line output position are shown from left to right. Specifically: When the two pairs of vertical hooks simultaneously drive the two thin lifting pulley blocks to be all at the high position, the first line output position is at the first working position; When the two pairs of vertical hooks drive one of the thin lifting pulley blocks to be located at a low position and the other to be located at a high position, the first line output position is at the second working position; When the two pairs of vertical hooks simultaneously drive the two thin lifting pulley blocks to be all located at the low position, the first line output position is in the second working position.

[0082] The first working position is the highest position, and the third working position is the lowest position. The difference between the first working position and the second working position is one stroke h of the jacquard machine. The difference between the second working position and the third working position is also one stroke h of the jacquard machine. The difference between the first working position and the third working position is two strokes 2h of the jacquard machine.

[0083] See also Fig.13 As shown, Fig.13 In the figure, E indicates the position of the harness, F indicates the upper shed, and G indicates the lower shed. When the thickness of the three-dimensional multi-layer fabric 27 is relatively large, in order to weave the warp yarns that penetrate the layer thickness, the opening device needs to have a large range of opening capacity, such as Fig.13 The fabric layer thickness shown is equivalent to 1 opening stroke h, so the opening device needs to have 3h opening strokes. For example, the uppermost radial hanging yarn 23 opens downward to the lowest opening position #2, which can form hanging yarns that penetrate the layer thickness from top to bottom; then the warp hanging yarn 24 in the lowermost layer opens upward to the highest opening position #1, which can form continuous hanging yarns that penetrate the layer thickness from bottom to top. Fig.13 In the figure, the stroke from position #1 to position #2 is 3h, and the jacquard opening device needs to have an opening capacity of 3h stroke, which can be achieved by connecting 3 needle selection units in series.

[0084] See also Fig.14 As shown, Fig.14 An embodiment of connecting three needle selection units in series is shown. Fig.14 From left to right, the four different working positions of the first line output position are shown. Specifically: When the three pairs of vertical hooks simultaneously drive the three thin lifting pulley blocks to be all at the high position, the first line output position is at the first working position; When the three pairs of vertical hooks drive one of the thin lifting pulley blocks to be in the low position and the other two to be in the high position, the first line output position is in the second working position; When the three pairs of vertical hooks drive two of the thin lifting pulley blocks to be in the low position and the remaining one to be in the high position, the first line output position is in the third working position; When the three pairs of vertical hooks simultaneously drive the three thin lifting pulley blocks to be all located at the low position, the first line output position is at the fourth working position.

[0085] The first working position is the highest position, and the fourth working position is the lowest position. The difference between the first working position and the second working position is one stroke h of the jacquard knife. The difference between the second working position and the third working position is also one stroke h of the jacquard knife. The difference between the third working position and the fourth working position is also one stroke h of the jacquard knife. The difference between the first working position and the third working position is two strokes of the jacquard knife, 2h. The difference between the first working position and the fourth working position is three strokes of the jacquard knife, 3h.

[0086] Theoretically, n pulley groups connected in series form a multi-position needle selection device, which can achieve n+1 needle lifting and stopping positions and a maximum range of n×h.

[0087] The pulley block of the compound-action jacquard device, on the one hand, converts the compound-action opening motion of a pair of conjugate knife-lifting into the up and down motion output of a head line through the pulley block. On the other hand, the pulley block can also be regarded as a knife-lifting stroke storage device: when the vertical hooks on both sides are up, the knife-lifting stroke is stored, and the head line is at a high position at this time; when the vertical hook on one side falls, the stored stroke is released through the lower pulley line, and the head line drops a stroke; when the lower pulley lines of multiple such pulley blocks are connected in series, if the vertical hook of one pulley block falls, the head line drops a stroke; if the vertical hooks of two pulley blocks fall, the head line drops two strokes; if the vertical hooks of n pulley blocks fall, the head line drops n strokes; this is the principle of realizing a multi-position large-stroke jacquard device.

[0088] For example, composite three-dimensional multi-layer woven fabrics not only have layered sheds when inserting the weft in each layer, but may also have cross-linked weft yarns that run through the layer thickness or warp vertical yarns that run through the layer thickness. When the fabric thickness is less than or equal to one opening stroke, a 3-fold stroke can be achieved. If the fabric thickness is greater than one opening stroke and less than or equal to two opening strokes, a jacquard opening device with a 4-fold stroke is required to achieve such weaving, and so on.

[0089] With the multi-position large-stroke jacquard shedding device of the present invention, this special weaving requirement can be achieved.

[0090] See also Fig.15 As shown, based on the above needle selection device unit, the present invention can also be made into A high-density component for a multi-position large-range needle selection device is an 8-needle multi-position large-range needle selection device component formed by stacking the above-mentioned multi-position large-range needle selection device or by mixed stacking of multiple positions and standard two positions.

[0091] The present invention can also be made into an electronic jacquard machine, which is equipped with the above-mentioned high-density component of the multi-position large-range needle selection device.

[0092] 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 multi-position large-range needle selection device, characterized in that: The invention comprises at least one substrate (1) and a spacer (2) covering the front and back sides of the substrate (1); the front groove of the substrate (1) and the back groove of the spacer (2) on the corresponding side and the back groove of the substrate (1) and the front groove of the spacer (2) on the corresponding side can both form a pulley block groove plate; a pair of vertical hooks and a group of thin lifting pulley blocks are slidably arranged in the front and rear pulley block groove plates; the front and rear pairs of vertical hooks respectively drive the corresponding group of thin lifting pulley blocks to slide up and down through the corresponding upper pulley lines; the top of the substrate (1) is provided with two electromagnets stacked up and down through an electromagnet frame (9); the two electromagnets have two upper and lower intersecting magnetic pole surfaces and can cooperate with the corresponding pair of armature hooks to form a closed magnetic circuit; the two pairs of armature hooks are respectively located on the left and right sides of the two electromagnets, and the shaft holes of the two pairs of armature hooks are respectively aligned with the front and back sides of the top of the substrate (1). The corresponding rotating shafts on the surface are rotatably connected, and the rear side surfaces of the hook tips of the two pairs of armature hooks are elastically connected to the left and right sides of the electromagnet skeleton (9) through a pair of springs respectively; the vertical hook, the thin lifting pulley group, the electromagnet, the armature hook and the spring located on the same surface of the substrate (1) constitute a needle selection unit; the bottom of the substrate (1) is provided with a connecting pulley (15) through a gasket (21), when n needle selection units are alternately superimposed through the substrate (1) and the spacer (2), n is a positive integer, and one end of the lower pulley line of the adjacent two groups of the thin lifting pulley groups is connected after smoothly transitioning through the lower edge of the corresponding connecting pulley (15) in the form of a forward slash or a reverse slash, so as to form a lower pulley line shared by the n thin lifting pulley groups, one end of the shared lower pulley line is fixed, and the other end is connected to the first line connector output, so as to realize multi-position first line output of n+1 positions, specifically: When the n thin lifting pulley blocks are all in the high position, the first line output position is in the first working position; When one of the n thin lifting pulleys is in the low position and n-1 is in the high position, the first line output position is in the second working position; When 2 of the n thin lifting pulley blocks are located at the low position and n-2 are located at the high position, the first line output position is at the third working position; By analogy, when all of the n thin lifting pulley groups are in the low position, the first line output position is at the n+1th working position; The first working position is the highest position of the first line output, and the n+1th working position is the lowest position of the first line output. The height from the first working position to the n+1th working position gradually decreases, and the height difference between two adjacent working positions corresponds to a movement stroke of the jacquard machine knife.

2. The multi-position large-range needle selection device according to claim 1, characterized in that: The connecting pulley (15) is installed in the interlayer between the two extension plates (10) at an angle to the left or right, so as to bridge the two front and rear sets of the thin lifting pulley groups, so that one end of the lower pulley line of the two front and rear sets of the thin lifting pulley groups can smoothly access the lower edge of the connecting pulley (15) from the front and rear sides and connect with each other; The upper parts of the two extension sheets (10) are each provided with a fixing hole (22), and the two extension sheets (10) are fixedly spliced ​​together by corresponding fasteners cooperating with the two fixing holes (22); the top ends of the two spliced ​​extension sheets (10) are fixedly connected to the bottom ends of the base sheet (1), and the bottom ends of the two spliced ​​extension sheets (10) are fixedly connected to the top ends of the gaskets (21); the inclination direction of the connecting pulley (15) is determined by the inclination direction of the connecting pulley mounting surface in the interlayer between the two extension sheets (10); When the connecting pulley installation surface is tilted to the right, the longitudinal section of the sandwich between the two extension pieces (10) is in a Z-shaped structure. At this time, the connecting pulley (15) is tilted to the right and is used to connect the left end of the lower pulley line of the previous thin lifting pulley group with the right end of the lower pulley line of the next thin lifting pulley group, that is, to connect in a forward oblique line manner; When the connecting pulley installation surface is tilted to the left, the longitudinal section of the sandwich between the two extension pieces (10) is in an inverted Z-shaped structure. At this time, the connecting pulley (15) is tilted to the left and is used to connect the right end of the lower pulley line of the previous thin lifting pulley group with the left end of the lower pulley line of the next thin lifting pulley group, that is, to connect in an inverted oblique manner.

3. The multi-position large-range needle selection device according to claim 1, characterized in that: The front groove of the substrate (1) comprises an A-side pulley block slide groove located in the middle and fully linear A-side vertical hook guide rails located on the left and right sides; the back groove of the substrate (1) comprises a B-side pulley block slide groove located in the middle and fully linear B-side vertical hook guide rails located on the left and right sides; the A-side pulley block slide groove has the same structure as the B-side pulley block slide groove, and the A-side vertical hook guide rail has the same structure as the B-side vertical hook guide rail; The front groove and the back groove of the spacer (2) have the same structure and are matched with the front groove and the back groove of the base plate (1) respectively; the A-side pulley block slide groove and the A-side vertical hook guide rail cooperate with the back groove of the spacer (2) to realize the installation of the thin lifting pulley block and the vertical hook in the pulley block groove plate located on the front side; the B-side pulley block slide groove and the B-side vertical hook guide rail cooperate with the front groove of another spacer (2) to realize the installation of the thin lifting pulley block and the vertical hook in the pulley block groove plate located on the rear side.

4. The multi-position large-range needle selection device according to claim 3, 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 identical structure; the two lifting pulley blocks are respectively a first thin lifting pulley block (7a) and a second thin lifting pulley block (7b) of identical structure; the two electromagnets stacked up and down are respectively an upper electromagnet (3b) and a lower electromagnet (3a) of symmetrical structure; the two pairs of armature hooks are respectively an upper armature hook (4b) and a lower armature hook (4a) of different structure; the two pairs of springs are respectively a pair of first springs (5a) and a pair of second springs (5b) of identical structure; the two pairs of rotating shafts are respectively a first rotating shaft (8a) and a second rotating shaft (8b) of identical structure; The structure located on the front side of the substrate (1) is that a pair of the first vertical hooks (6a) are respectively slidably arranged in the A-surface vertical hook guide rails on the left and right sides, and the first thin lifting pulley group (7a) is slidably arranged in the A-surface pulley group slide groove, and the two ends of the upper pulley line of the first thin lifting pulley group (7a) are respectively connected to the bottom ends of the pair of the first vertical hooks (6a), and the two ends of the lower pulley line of the first thin lifting pulley group (7a) are respectively connected to the head line joint (20) and the connecting pulley (15); the first vertical hook (6a) drives the knife to rise and fall in the A-surface vertical hook guide rail. The first thin lifting pulley group (7a) is lifted and lowered in the A-surface pulley group slide groove; the lower electromagnet (3a) is fixedly mounted at the lower end of the electromagnet frame (9); a pair of lower armature hooks (4a) are respectively located on the left and right sides of the lower electromagnet (3a), and a pair of lower armature hooks (4a) are located on the inner side of a pair of first vertical hooks (6a); the axial hole portions of the pair of lower armature hooks (4a) are rotatably connected to the corresponding points on the front side of the top spacer through a corresponding pair of first rotating shafts (8a); the rear side surfaces of the hook tips of the pair of lower armature hooks (4a) are respectively connected to the electromagnet frame through a pair of first springs (5a). The lower part of the frame (9) is elastically connected to the corresponding points on the left and right sides of the lower part of the frame (9), and the intersecting magnetic pole surfaces of the lower electromagnet (3a) can cooperate with the two side surfaces of a pair of lower 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 portion of the lower armature hook (4a) are both on the same side of the first rotating shaft (8a); when the lower electromagnet (3a) is energized, the lower armature hook (4a) moves laterally from a dynamic magnetic gap position close to the corresponding magnetic pole direction of the lower electromagnet (3a) to a position close to the lower armature hook (4a) under the attraction of the lower electromagnet (3a). The electromagnet (3a) is in a closed magnetic circuit position with the corresponding magnetic poles being in contact with each other and is maintained. At this time, the hook tip of the lower armature hook (4a) does not contact the hook tip of the first vertical hook (6a), and is in a decoupled state. When the lower electromagnet (3a) is not energized, the lower armature hook (4a) moves laterally from the closed magnetic circuit position with the corresponding magnetic poles of the lower electromagnet (3a) to a dynamic magnetic gap position close to the direction of the corresponding magnetic poles of the lower electromagnet (3a) under the action of the first spring (5a). At this time, the hook tip of the lower armature hook (4a) hooks the hook tip of the first vertical hook (6a) in a lifting manner, and is in a hooked state. The structure located on the back side of the substrate (1) is that a pair of the second vertical hooks (6b) are respectively slidably arranged in the B-side vertical hook guide rails on the left and right sides, and the second thin lifting pulley group (7b) is slidably arranged in the B-side pulley group sliding groove, and the two ends of the upper pulley line of the second thin lifting pulley group (7b) are respectively connected to the bottom ends of the pair of the second vertical hooks (6b), and the two ends of the lower pulley line of the second thin lifting pulley group (7b) are respectively connected to the first line joint (20) and the connecting pulley (15); the second vertical hook (6b) is driven by the lifting knife in the B-side vertical hook guide rail. The second thin lifting pulley group (7b) is lifted and lowered in the B-side pulley group slide groove; the upper electromagnet (3b) is fixedly installed at the upper end of the electromagnet frame (9); a pair of upper armature hooks (4b) are respectively located on the left and right sides of the upper electromagnet (3b), and a pair of upper armature hooks (4b) are located on the inner side of a pair of second vertical hooks (6b); the axial hole portions of a pair of upper armature hooks (4b) are rotatably connected to the corresponding points on the rear side of the top spacer through a corresponding pair of second rotating shafts (8b); the rear side surfaces of the hook tips of a pair of upper armature hooks (4b) are respectively connected to the electromagnet through a pair of second springs (5b). The corresponding points on the left and right sides of the upper part of the skeleton (9) are elastically connected, and the intersecting magnetic pole surfaces of the upper electromagnet (3b) can cooperate with the two side surfaces of a pair of upper 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 portion of the upper armature hook (4b) are both on the same side of the second rotating shaft (8b); when the upper electromagnet (3b) is energized, the upper armature hook (4b) moves laterally from a dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the upper electromagnet (3b) to a position close to the upper armature hook (4b) under the attraction of the upper electromagnet (3b). The back closed magnetic circuit position where the corresponding magnetic poles of the electromagnet (3b) are in contact with each other is maintained, and at this time, the hook tip of the upper armature hook (4b) does not contact the hook tip of the second vertical hook (6b), and is in a decoupled state; when the upper electromagnet (3b) is not energized, the upper armature hook (4b) moves laterally from the back closed magnetic circuit position where the corresponding magnetic poles of the upper electromagnet (3b) are in contact with each other under the action of the second spring (5b) to a dynamic magnetic gap position close to the direction of the corresponding magnetic poles of the upper electromagnet (3b), and at this time, the hook tip of the upper armature hook (4b) hooks the hook tip of the second vertical hook (6b) in a lifting manner, and is in a hooked state.

5. The multi-position large-range needle selection device according to claim 1, 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); the upper edge of the inner side of the rod-shaped body (601) and the A convex edge is provided below the top hook portion (603). When the vertical hook moves upward, the convex edge can laterally push the armature hook on the corresponding side from a static magnetic gap position away from the electromagnet direction to a dynamic magnetic gap position close to the electromagnet direction and keep it at the dynamic magnetic gap position. 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. The pushing section (604a) is a section extending from the top hook portion (603). The top hook portion (603) is an inclined curve starting from the bottom of the hook, the holding section (604b) is a straight line parallel to the moving direction of the rod-shaped body (601), and 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 hook of the top hook portion (603) is greater than the distance from the hook tip of the top hook portion (603) to the bottom of the hook of the top hook portion (603); the length of the holding section (604b) of the convex edge corresponds to the length of the needle selection device to which it belongs. The tolerance range of the jacquard machine knife lifting height is allowed; a section of limiting convex edge (605) is provided along the edge of the middle and lower parts of the inner side of the rod-shaped body (601) for engaging with the corresponding groove of the first substrate and ensuring that the vertical hook does not produce lateral displacement, and the top 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 lifting is provided between the side ear (602) and the rod-shaped body (601).

6. The multi-position large-range needle selection device according to claim 1, 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 hook tip portion (403) and the magnetic pole surface suction contact portion (405) are both on the same side of the rotating shaft; 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, and 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 (9); 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.

7. The multi-position large-range needle selection device according to claim 1, characterized in that: The thin pulley set includes two vertical plates (701), two upper cross plates (702), two middle cross plates (703), two lower cross plates (704) and two thin pulleys (705); after the two upper cross plates (702) are joined face to face, an upper fixing plate is formed, after the two middle cross plates (703) are joined face to face, a middle fixing plate is formed, and after the two lower cross plates (704) are joined face to face, a lower fixing plate is formed; the upper fixing plate, the middle fixing plate and the lower fixing plate form a "king" - shaped bracket under the front - and - back clamping of the two vertical plates (701); there is a pulley installation gap between the two vertical plates (701) under the support of the upper fixing plate, the middle fixing plate and the lower fixing plate, and the pulley installation gap forms an upper pulley installation gap position and a lower pulley installation gap position in the area between the upper fixing plate and the middle fixing plate and in the area between the middle fixing plate and the lower fixing plate respectively; The two thin pulleys (705) are respectively rotatably mounted in the upper pulley installation gap position and the lower pulley installation gap position through corresponding sliding bearing assemblies; The width of the vertical plate (701) is less than the diameter of the thin pulley (705), and a buffer and shock - absorbing structure (706) is arranged in the middle of the vertical plate (701) by grooving; the width of the middle cross plate (703) is slightly greater than the diameter of the thin pulley (705), and the thicknesses of the left and right ends of the middle cross plate (703) are the same to serve as positioning sliders (707) when the thin pulley set moves in the pulley set chute; the widths of the upper cross plate (702) and the lower cross plate (704) are equal, the widths of the upper cross plate (702) and the lower cross plate (704) are both less than the width of the middle cross plate (703) and greater than the width of the vertical plate (701); The sliding bearing assembly includes a journal (713) and a bushing (714), the journal (713) is arranged on the axis of the thin pulley (705), and the bushings (714) are respectively arranged on the front and back vertical plates (701); the journal (713) and the bushing (714) are made of metal materials with similar hardness, wherein the hardness rate of the bushing (714) is greater than the hardness of the journal (713); an oil storage groove (715) is opened on the journal (713), and a sealing cover (708) for covering the oil storage groove is arranged on the outer periphery of the bushing (714).

8. The multi-position large-range needle selection device according to claim 1, characterized in that: A heat sink (16) for dissipating heat for the coil of the electromagnet and having an electromagnetic shielding function is arranged on the top of the spacer (2); the heat sink (16) is attached to the side surface of the top spacer of the spacer (2) close to the electromagnet, and its position corresponds to the position of the electromagnet. The heat sink (16) is made of a non-magnetic metal material including copper, aluminum or copper-aluminum alloy that has an electromagnetic shielding function. At least one surface of the heat sink (16) is exposed to the outside and in good contact with the metal body to conduct heat and electricity to the outside, and two adjacent heat sinks (16) are also in good contact with each other to maintain heat and electricity conduction.

9. A high-density assembly for a multi-position, large-range needle selection device, characterized in that: The invention relates to a high-density multi-position large-range needle selection device assembly formed by stacking the multi-position large-range needle selection device as described in any one of claims 1 to 8 or by mixed stacking of multi-position and standard two-position.

10. An electronic jacquard machine, characterized in that: The electronic jacquard machine is equipped with a high-density assembly of a multi-position, large-range needle selection device as described in claim 9.

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