Compact three-position needle selection device, assembly thereof and electronic jacquard machine

Abstract

The invention discloses a compact three-position needle selection device, an assembly thereof and an electronic jacquard machine. The compact three-position needle selection device comprises a first substrate and a second substrate which are spliced front and back, a pair of vertical hooks and a group of lifting pulley blocks are arranged on groove plates on the front surface and the back surface of the first substrate, the two groups of lifting pulley blocks are overlapped in an up-and-down staggered manner, and 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 first 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 first substrate, one ends of the lower pulley lines of the two 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, and the other ends of the lower pulley lines of the two lifting pulley blocks are fixed and connected with a first line connector respectively. According to the double-shed carpet jacquard machine assembly, the first thread output has three positions, the 8-needle three-position assembly can correspond to the 4 * 3.5 cm < 2 > projection area, and the double-shed carpet jacquard machine assembly has the highest needle lifting density at present.

Description

Technical Field

[0001] The invention belongs to the technical field of electronic jacquard machines of textile machinery, and in particular relates to a compact three-position needle selection device and components thereof, and an electronic jacquard machine. Background Art

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

[0003] In the needle selection device, the armature is made into a hook shape, called an armature hook, and there is also a vertical hook that can move up and down with the jacquard knife. When the vertical hook is unhooked from the armature hook, it is called the "unhooked" state, and the vertical hook moves with the knife; when the vertical hook is hooked on the armature hook, it is called the "hung" state, and the vertical hook is detached from the knife and does not move with the knife. It can usually be designed that position 1 (stable position) is the "hung" state, and position 2 (temporary steady position) is the "unhooked" state, or vice versa. Since the vertical hook connects the harness and the heald to control the warp yarn, the rise and fall of the vertical hook corresponds to the rise and fall of the warp yarn.

[0004] Jacquard machines are divided into single-action and double-action types. The double-action type has a complex mechanism. One jacquard needle corresponds to two vertical hooks, and the two vertical hooks are converted into the rise and fall of one jacquard needle through a pulley block. The double-action type has little damage to the warp yarn and is conducive to weaving. Currently, most electronic jacquard machines are double-action type. The needle selection device produced in large quantities commercially often makes 8 electromagnets and corresponding mechanisms into a combination for easy installation and maintenance.

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

[0006] At present, a needle selection device is widely used in the market, and its needle density is 8 needles corresponding to 4×3.5cm 2 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 compact three-position needle selection device, for example, 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] 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. 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" consisting 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 the two independent vertical hooks to increase the needle lifting density of the two-position needle selection device, nor can it derive a high-density solution. Summary of the invention

[0011] In order to make up for the deficiencies of the above-mentioned prior art, the present invention provides a compact three-position needle selection device and its components, 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:

[0013] A compact three-position needle selection device comprises a first substrate and a second substrate which are spliced ​​together front and back; a pair of vertical hooks and a group of lifting pulley groups are slidably arranged on the front and back groove plates of the first substrate, and the upper and lower groups of the lifting pulley groups are stacked in an up-and-down staggered manner through the concave-convex design structure of the first substrate itself, and the front and rear pairs of the vertical hooks respectively drive the upper and lower groups of the lifting pulley groups to slide up and down through the corresponding upper pulley lines; two electromagnets stacked up and down are arranged on the spacer at the top of the first substrate through an electromagnet skeleton, and the two electromagnets have two upper and lower intersecting magnetic pole surfaces, and can cooperate with their respective corresponding pairs of armature hooks to form a 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 sides of the spacer, and the rear side surfaces of the hook tips of the two pairs of armature hooks are elastically connected with the left and right sides of the electromagnet skeleton through springs respectively; when the electromagnet is energized, the corresponding armature hook remains in the closed magnetic circuit position to which it belongs, 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;

[0014] The bottom of the first substrate is provided with one or two connecting pulleys with ball bearings through an extension sheet, and one end of the lower pulley line of the upper and lower two groups of the lifting pulley groups is connected after a smooth transition through the lower edge of the connecting pulley in a forward slash or reverse slash manner to form a lower pulley line shared by the two lifting pulley groups, one end of the shared lower pulley line is fixed, and the other end is connected to the first connector output, so that the first line output at three positions can be realized, which are:

[0015] When the four vertical hooks on both sides are in high position, the first line output position is in the first working position;

[0016] When one of the vertical hooks on the front and the two vertical hooks on the back are both in high positions, and the other vertical hook on the front is in low position, the first line output position is in the second working position; the height difference between the second working position and the first working position is an opening stroke;

[0017] When a vertical hook on the front and a vertical hook on the back are both in high positions, and another vertical hook on the front and another vertical hook on the back are in low positions, the first-line output position is in the third working position; the difference in height between the third working position and the second working position is one opening stroke, and the difference in height between the third working position and the first working position is two opening strokes.

[0018] Furthermore, the connecting pulley is installed in the interlayer of the extension piece tilted to the left or right, so as to bridge the upper and lower lifting pulley groups, so that the lower pulley lines of the front and rear lifting pulley groups can smoothly access the lower edge of the connecting pulley from both sides and connect to form a three-position head line;

[0019] The inclination direction of the connecting pulley is determined by the inclination direction of the connecting pulley mounting surface in the extension sheet interlayer.

[0020] When the connecting pulley installation surface is tilted to the right, the extension piece is a type 1 extension piece with a Z-shaped longitudinal section. 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 upper pulley block with the right end of the lower pulley line of the lower pulley block, that is, connected in a forward oblique line manner;

[0021] When the connecting pulley mounting surface is tilted to the left, the extension piece is a Type 2 extension piece with an inverted Z-shaped structure in longitudinal section. 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 upper pulley block with the left end of the lower pulley line of the lower pulley block, that is, connected in an inverted oblique manner.

[0022] Furthermore, the front groove plate of the first substrate is provided with four functional sections from top to bottom, namely, a fully linear upper pulley block vertical hook slide groove section, an upper pulley line groove section of an upper pulley block, an upper pulley slide groove section of an upper pulley block, and a lower pulley line groove section of an upper pulley block; the back groove plate of the first substrate is provided with four functional sections from top to bottom, namely, a fully linear lower pulley block vertical hook slide groove section, an upper pulley line groove section of a lower pulley block, a lower pulley slide groove section of a lower pulley block, and a lower pulley line groove section of a lower pulley block.

[0023] The vertical hook slide groove section of the upper pulley block corresponds to the vertical hook slide groove section of the lower pulley block in front and back and has the same thickness; the pulley slide groove section of the upper pulley block corresponds to the position of the upper pulley line groove section of the lower pulley block in front and back, and the thickest pulley block bracket section of the upper pulley block pulley slide groove section is located at the center position of the first substrate, and the upper pulley line groove sections of the lower pulley block are located at both sides of the first substrate, and do not conflict in space and can be nested; the lower pulley line groove section of the upper pulley block corresponds to the position of the pulley slide groove section of the lower pulley block, and the lower pulley line groove sections of the upper pulley block are located at both sides of the first substrate and do not conflict with the pulley block bracket section of the lower pulley block pulley slide groove section located at the center position of the first substrate; the pulley slide groove section of the upper pulley block and the pulley slide groove section of the lower pulley block are designed in an up and down staggered and stacked manner on the front and back sides, and the pulley slide groove section of the upper pulley block and the pulley slide groove section of the lower pulley block have the same thickness.

[0024] Furthermore, the first substrate and the second substrate are both plastic parts that are injection molded in one step, and buckles are respectively provided on the front and back sides of the first substrate and the second substrate, and the front side of each second substrate is spliced ​​with the back side of the first substrate to which it belongs through the corresponding buckle, and the back side of each first substrate is spliced ​​with the back side of the second substrate to which the adjacent first substrate belongs through the corresponding buckle; and positioning notches for judging whether the splicing of the two is correct are respectively provided on the lower side end surface of the first substrate and the lower side end surface of the second substrate, and when the first substrate and the second substrate are spliced ​​facing each other with the correct side groove type, the positioning notch on the first substrate is left-to-right fitted with the positioning notch on the second substrate.

[0025] 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 sets are respectively an upper pulley set and a lower pulley set 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.

[0026] The structure in the front groove plate of the first substrate is that a pair of the first vertical hooks are respectively slidably arranged on the left and right sides of the vertical hook sliding groove section of the upper pulley block, and the upper pulley block is slidably arranged in the pulley sliding groove section of the upper pulley block, and the two ends of the upper pulley line of the upper pulley block are connected to the pair of the first vertical hooks after passing through the upper pulley line groove section of the upper pulley block, and the two ends of the lower pulley line of the upper pulley block are respectively fixed and connected to the connecting pulley after passing through the lower pulley line groove section of the upper pulley block; the first vertical hook is arranged on the The upper pulley block vertical hook slide section drives the upper pulley block to rise and fall in the pulley slide section of the upper pulley block as the knife is lifted; the lower electromagnet is fixedly installed at the lower end of the electromagnet skeleton, a pair of lower armature hooks are respectively located on the left and right sides of the lower electromagnet, and a pair of lower armature hooks are located on the inner sides of a pair of first vertical hooks, a pair of axial hole portions of the lower armature hooks are rotatably connected to 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 lower armature hooks are respectively connected through a pair of first The spring is elastically connected to the corresponding points on the left and right sides of the lower part of the electromagnet skeleton, and the intersecting magnetic pole surfaces of the lower electromagnet respectively cooperate with the two side surfaces of a pair of lower armature hooks to form a corresponding 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 corresponding magnetic pole direction of the lower electromagnet under the attraction of the lower electromagnet 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, and 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 hooked state.

[0027] The structure in the back groove plate of the first substrate is that a pair of second vertical hooks can be slidably arranged on the left and right sides of the vertical hook slide groove section of the lower pulley group respectively, and the lower pulley group can be slidably arranged up and down in the pulley slide groove section of the lower pulley group, and the upper pulley line of the lower pulley group is connected with a pair of second vertical hooks after passing through the upper pulley line groove section of the lower pulley group, and the two ends of the lower pulley line of the lower pulley group are respectively connected with the first line joint and the connecting pulley after passing through the lower pulley line groove section of the lower pulley group; the second vertical hook drives the lower pulley group to rise and fall in the pulley slide groove section of the lower pulley group as the knife is lifted; the upper electromagnet is fixedly installed at 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 with the corresponding points on the rear side surface 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 by a pair of The second spring is elastically connected to the corresponding points on the left and right sides of the upper part of the electromagnet skeleton, and the intersecting magnetic pole surfaces of the upper electromagnet respectively cooperate with the two side surfaces of a pair of upper armature hooks to form a corresponding 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 is attracted by the upper electromagnet and moves laterally from the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the upper electromagnet The upper armature hook moves to a back closed magnetic circuit position that fits the corresponding magnetic pole of the upper electromagnet and is maintained, 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 a 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, and is in a hooking state.

[0028] 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.

[0029] Furthermore, the armature hook includes a straight rod portion, a pole surface sliding contact portion, a 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 pole surface sliding contact portion, the hook tip portion is arranged at the other end of the straight rod portion through the pole surface suction contact portion, and the spring positioning column is arranged on the side wall of the straight rod portion facing the electromagnet; the hook tip portion and the pole surface suction contact portion are both on the same side of the corresponding rotating shaft.

[0030] The electromagnet is formed by winding enameled wire around 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 bending portion bent backward, and the left and right ends of the short magnetic pole have a second bending portion bent forward, the first bending portion and the second bending portion are in a front-to-back offset form, and the offset amplitude is equal to the thickness of the straight rod portion; the concave surface of the first bending portion serves as a sliding magnetic pole surface, and the side end surface of the second bending 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 arranged 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 arranged in the groove.

[0031] After the armature hook is assembled with the electromagnet, 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 a corresponding point on the side wall of the electromagnet skeleton; the magnetic pole surface sliding contact portion is tightly embedded in a groove formed by the sliding magnetic pole surface, the magnetic conductive plastic upper cover and the magnetic conductive 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, three sides of the magnetic pole surface sliding contact portion are respectively in contact with the sliding magnetic pole surface, the magnetic conductive plastic upper cover and the magnetic conductive 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.

[0032] Furthermore, the lifting pulley group includes two mounting plates, two movable pulleys, two ball bearings, two movable pulley shafts, a bracket pressing protrusion and a bracket pressing hole; the two movable pulleys are respectively arranged at the upper and lower ends of the pulley bracket formed by the two mounting plates through their respective corresponding pairs of ball bearings and the movable pulley shafts; and the two movable pulleys are respectively equipped with an upper pulley line and a lower pulley line of adapted thickness; the widths of the two mounting plates are both smaller than the diameters of the movable pulleys; the thicknesses of the two mounting plates are equal, so as to serve as positioning sliders when the lifting pulley group moves on the front slot plate or the back slot plate of the first substrate.

[0033] Furthermore, a printed circuit board slot is provided at the top of the electromagnet skeleton, and metal spring sheets for connecting the coil leads of the electromagnet are provided on both sides of the printed circuit board slot, and coil lead grooves, a first spring mounting hole and a second spring mounting hole are provided on the left and right sides of the electromagnet skeleton.

[0034] Furthermore, a heat sink for dissipating heat for the coil of the electromagnet and having an electromagnetic shielding function is provided on the partition at the top of the second substrate; the heat sink is attached to the side surface of the partition at the top of the second substrate 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.

[0035] A compact three-position needle selection device assembly is an 8-needle compact three-position needle selection device assembly formed by stacking four of the above-mentioned compact three-position needle selection devices.

[0036] It should be noted that the technical solution of the present invention is not limited to the production of 8-needle compact three-position needle selection device components, but can also be used to produce higher-density compact three-position needle selection device components.

[0037] An electronic jacquard machine is equipped with the above-mentioned compact three-position needle selection device assembly.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The present invention optimizes and improves the groove profiles on both sides of the substrate, and realizes installation of two sets of stacked lifting pulley assemblies on both sides of the substrate while keeping the thickness of the existing pulley block unchanged, thereby improving the installation density of the lifting pulley assembly. Compared with the existing open jacquard machine pulley block, the double-layer groove plate after the first substrate and the second substrate are spliced ​​has a compact structure and good airtightness, which can minimize the impact of flower hair and dust on the lifting pulley assembly, has a long service life, is easy to install, and is simple to maintain, and is suitable for mass production.

[0040] The present invention adds an inclined connecting pulley at the bottom of the first substrate, and connects one end of the lower pulley line of the upper and lower lifting pulley groups in series in the form of a forward slash or a reverse slash through the lower edge of the connecting pulley after smoothly routing, so that when the needles of the upper and lower lifting pulley groups are both in a high position, the first line output is also in a high position, which is the first working position. When one of the needles of the upper and lower lifting pulley groups is in a low position and the other is in a high position, the first line output drops a stroke, which is the second working position. When the needles of the upper and lower lifting pulley groups are both in a low position, the first line output drops two strokes, which is the third working position. After superimposing 4 sets of needle selection device units of the present invention, it can be achieved that the 8-needle three-position component corresponds to 4×3.5cm 2 The projected area is the double-shed carpet jacquard machine component with the highest needle density at present.

[0041] The present invention optimizes and improves the hook unhooking technology, and adopts the full-range linear vertical hook guide rail and the vertical hook convex edge design to form a new hook unhooking technology. This technology can design a larger hook so that there is no need to worry about the difficulty of unhooking the large hook, and the sufficient design margin can ensure the reliability of the action under complex working conditions. The full-range linear vertical hook guide rail and the vertical hook convex edge cooperate to ensure the accuracy of the lateral displacement of the convex edge to the armature hook when the vertical hook moves up and down, so that a dynamic magnetic gap range of 0 to 0.3 mm can be achieved. In addition, the distance from the holding section of the vertical hook convex edge to the hook bottom is greater than the distance from the hook tip to the hook bottom. This distance difference is also the distance from the armature hook tip to the vertical hook tip, thereby leaving a hook unhooking margin, which is also a tolerance margin, which can prevent misoperation and improve reliability. The retaining section of the convex edge enables the lifting knife to reach the vertical hook switching height (switching from hanging to unhooking) required by the needle selection device within a wide range, and has a wide lifting knife height tolerance range (tolerance margin), which reduces the manufacturing difficulty of the jacquard machine host and improves the reliability of the whole machine action. The vertical hook is provided with one or more shock-absorbing grooves between the side ears and the rod to prevent the vibration of lifting the knife from being transmitted to the hook tip through the side ears, which can also improve the reliability of the action.

[0042] 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.

[0043] 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

[0044] 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:

[0045] Figure 1 An exploded view of an embodiment of a compact three-position needle selection device of the present invention;

[0046] Figure 2 An exploded view of another embodiment of the compact three-position needle selection device of the present invention;

[0047] Figure 3 It is a schematic diagram of the front magnetic circuit structure and the structure of the vertical hook of the compact three-position needle selection device of the present invention;

[0048] Figure 4 It is a schematic diagram of the back magnetic circuit structure and the vertical hook structure of the compact three-position needle selection device of the present invention;

[0049] Figure 5 It is a schematic structural diagram of the I-shaped iron core and the armature hook of the compact three-position needle selection device of the present invention when forming a closed magnetic circuit;

[0050] Figure 6It is a schematic structural diagram of the double electromagnets and the electromagnet frame of the compact three-position needle selection device of the present invention after being assembled;

[0051] Figure 7 It is a structural diagram of an embodiment of a vertical hook in the compact three-position needle selection device of the present invention;

[0052] Figure 8 It is a structural diagram of another embodiment of a vertical hook in the compact three-position needle selection device of the present invention;

[0053] Fig. 9 It is a three-dimensional diagram of the lifting pulley assembly in the compact three-position needle selection device of the present invention;

[0054] Fig.10 It is an exploded view of the lifting pulley assembly in the compact three-position needle selection device of the present invention;

[0055] Fig.11 It is a structural schematic diagram of a single pulley 1 type extension piece embodiment of a compact three-position needle selection device of the present invention;

[0056] Fig.12 It is a structural schematic diagram of a single pulley type 2 extension piece embodiment of a compact three-position needle selection device of the present invention;

[0057] Fig.13 It is a structural schematic diagram of an embodiment of a double pulley 1 type extension piece of a compact three-position needle selection device of the present invention;

[0058] Fig.14 It is a structural schematic diagram of an embodiment of a double pulley 2-type extension piece of a compact three-position needle selection device of the present invention;

[0059] Fig.15 It is a schematic diagram of the working principle of the first line three positions of the compact three-position needle selection device of the present invention;

[0060] Fig.16 It is a three-dimensional view of the compact three-position needle selection device assembly of the present invention. DETAILED DESCRIPTION

[0061] 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.

[0062] See also Figure 1 and Figure 2As shown, a compact three-position needle selection device mainly includes a first substrate 1 and a second substrate 2 which are assembled together front and back, two pairs of vertical hooks with the same structure and two groups of lifting pulley groups with the same structure arranged on the front groove plate and the back groove plate of the first substrate 1, upper and lower groups of electromagnets and upper and lower pairs of armature hooks arranged on the top partition of the first substrate 1, a connecting pulley 15 arranged on the bottom extension plate 10 of the first substrate 1, and a heat sink 16 arranged on the top partition of the second substrate 2.

[0063] See also Figure 1 and Figure 2 As shown, the front groove plate of the first substrate 1 is provided with four functional sections from top to bottom, including the upper pulley block vertical hook slide section, the upper pulley block upper pulley line groove section, the upper pulley block pulley slide section, and the upper pulley block lower pulley line groove section. The back groove plate of the first substrate 1 is provided with four functional sections from top to bottom, including the lower pulley block vertical hook slide section, the lower pulley block upper pulley line groove section, the lower pulley block pulley slide section, and the lower pulley block lower pulley line groove section.

[0064] The upper pulley block vertical hook slot section corresponds to the lower pulley block vertical hook slot section in front and back positions and have the same thickness. The upper pulley block pulley slot section corresponds to the upper pulley line slot section of the lower pulley block in front and back positions, and the thickest pulley block bracket section of the upper pulley block pulley slot section is located at the center of the first substrate 1, while the upper pulley block pulley line slot section is located on both sides of the first substrate 1, and there is no conflict in space and they can be nested. The lower pulley line slot section of the upper pulley block corresponds to the lower pulley block pulley slot section in front and back positions, and the lower pulley line slot section of the upper pulley block is located on both sides of the first substrate 1, and does not conflict with the pulley block bracket section of the lower pulley block pulley slot section located at the center of the first substrate 1. The pulley slot section of the upper pulley block and the pulley slot section of the lower pulley block are designed to be staggered and stacked up and down on the front and back sides, and the pulley slot section of the upper pulley block and the pulley slot section of the lower pulley block have the same thickness, providing space for the subsequent staggered installation of the upper pulley block and the lower pulley block.

[0065] The front side of the second substrate 2 is designed with a front groove shape matching the lower pulley block vertical hook groove section, the upper pulley line groove section of the lower pulley block, the lower pulley block pulley groove section, and the lower pulley line groove section of the lower pulley block on the back side of the first substrate 1, and the back side of the second substrate 2 is designed with a back groove shape matching the upper pulley block vertical hook groove section, the upper pulley line groove section, the upper pulley block pulley groove section, and the lower pulley line groove section of the upper pulley block on the front side of the first substrate 1.

[0066] The first substrate 1 and the second substrate 2 are both plastic parts that are injection molded in one step. The first substrate 1 and the second substrate 2 are respectively provided with buckles on the front and back sides. The front side of each second substrate 2 is spliced ​​with the back side of the first substrate 1 to which it belongs through the corresponding buckle, and the back side of each first substrate 1 is spliced ​​with the back side of the second substrate 2 to which the adjacent first substrate 1 belongs through the corresponding buckle.

[0067] In addition, positioning notches for judging whether the two are correctly assembled are respectively provided on the lower side end surfaces of the first substrate 1 and the second substrate 2. When the first substrate 1 and the second substrate 2 are assembled facing each other with the correct side groove type, the positioning notch on the first substrate 1 fits left and right with the positioning notch on the second substrate 2.

[0068] Through the above-disclosed concave-convex structural design of the first substrate 1 itself, and the cooperation of the front and rear two second substrates 2, the two groups of the lifting pulley groups are stacked in an up-and-down offset manner on the front and back sides of the first substrate 1, so that two needle selection units can be accommodated in one substrate without increasing the width and thickness of the substrate, that is, the two needle selection units only occupy the same width (35mm) and thickness (5mm) of the original one needle selection unit.

[0069] See also Figure 1 and Figure 2 As shown, two electromagnets stacked up and down are arranged on the spacer at the top of the first substrate 1 through the electromagnet skeleton 9, and the two electromagnets have two intersecting magnetic pole surfaces. A pair of armature hooks for cooperating with a pair of vertical hooks on the same side are respectively arranged on the left and right sides of the two electromagnets. The two pairs of armature hooks are designed differently and are respectively located on the inner side of the pair of vertical hooks on the same side. The shaft holes of the two pairs of armature hooks are respectively rotatably connected with the corresponding rotating shafts on the front and back sides of the spacer. The rear side surfaces of the hook tips of the two pairs of armature hooks are respectively elastically connected with the left and right sides of the electromagnet skeleton 9 through springs. When the two electromagnets are energized, their intersecting magnetic pole surfaces can respectively cooperate with the corresponding pair of armature hooks to form a closed magnetic circuit. The two pairs of rotating shafts are respectively located outside the two closed magnetic circuits, and the hook tips and magnetic poles of the armature hooks are on the same side of the rotating shaft.

[0070] See also Figure 1 and Figure 2As shown, a pair of vertical hooks with the same structure are respectively arranged in the vertical hook slot section of the upper pulley block and the vertical hook slot section of the lower pulley block. A group of lifting pulley blocks with the same structure are respectively arranged in the pulley slot section of the upper pulley block and the pulley slot section of the lower pulley block, and the two groups of lifting pulley blocks are stacked in an up-and-down staggered manner on the front and back sides of the first substrate. The two ends of the upper pulley lines of the upper and lower groups of lifting pulley blocks are respectively connected to the front and rear pairs of vertical hooks, and the two pairs of vertical hooks drive their corresponding group of lifting pulley blocks through the upper pulley lines to slide up and down.

[0071] See also Figure 1 and Figure 2 As shown, the bottom of the first substrate 1 is provided with one or two connecting pulleys 15 with ball bearings through an extension sheet 10. One end of the lower pulley line of the upper and lower lifting pulley groups is connected after being smoothly transitioned through the lower edge of the connecting pulley 15 in a forward oblique line or a reverse oblique line manner to form a three-position head line shared by the two lifting pulley groups, and the remaining end of the lower pulley line of the upper and lower lifting pulley groups is respectively connected to the corresponding head line connector.

[0072] See also Figure 1 and Figure 2 As shown, a heat sink 16 for dissipating heat for the coil of the electromagnet and having an electromagnetic shielding function is provided on the spacer at the top of the second substrate 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 spacer at the top of the second substrate 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.

[0073] See also Figure 1 and Figure 2As shown, the two pairs of vertical hooks are respectively a pair of first vertical hooks 6a and a pair of second vertical hooks 6b with the same structure; the two lifting pulley blocks are respectively an upper pulley block 7a and a lower pulley block 7b with the same structure; the two electromagnets stacked up and down are respectively an upper electromagnet 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.

[0074] Because of the groove-shaped concave-convex design on both sides of the first substrate 1, two groups of pulley blocks with the same structure, i.e., the upper pulley block 7a and the lower pulley block 7b, can be accommodated at the same time without increasing the thickness of the groove plate. Also, because of the upper and lower 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, two pairs of vertical hooks of the same shape can be used in the vertical hook chute section of the upper pulley block and the vertical hook chute section of the lower pulley block, i.e., a pair of first vertical hooks 6a and a pair of second vertical hooks 6b.

[0075] See also Figure 3 As shown, the structure in the front groove plate of the first substrate is that a pair of the first vertical hooks 6a are respectively slidably arranged on the left and right sides of the vertical hook sliding groove section of the upper pulley block, and the upper pulley block 7a is slidably arranged in the pulley sliding groove section of the upper pulley block, and the two ends of the upper pulley line of the upper pulley block 7a pass through the upper pulley line groove section of the upper pulley block and are connected with the pair of the first vertical hooks 6a, and the two ends of the lower pulley line of the upper pulley block 7a pass through the lower pulley line groove section of the upper pulley block and are respectively fixed and connected with the connecting pulley 15; the first vertical hook 6a drives the upper pulley block 7a to rise and fall in the pulley sliding groove section of the upper pulley block as the knife is lifted; the lower electromagnet 3a is fixedly installed at the lower end of the electromagnet skeleton 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 a pair of lower armature hooks 4a are rotationally connected to the corresponding points on the front side of the top spacer through a corresponding pair of first rotating shafts 8a, the rear sides of the hook tips of a pair of lower armature hooks 4a are elastically connected to 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 respectively 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.

[0076] When the lower electromagnet 3a is energized, the lower armature hook 4a is held at the front closed magnetic circuit position that matches the corresponding magnetic pole of the lower electromagnet 3a under the attraction of the lower electromagnet 3a, and 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 away from the magnetic pole of the lower electromagnet 3a under the action of the first spring 5a, that is, it moves laterally from the front closed magnetic circuit position that matches the corresponding magnetic pole of the lower electromagnet 3a to the dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the lower electromagnet 3a, and 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.

[0077] See also Figure 4 As shown, the structure in the back groove plate of the first substrate is that a pair of the second vertical hooks 6b can be slidably arranged on the left and right sides of the vertical hook slide groove section of the lower pulley group, respectively, and the lower pulley group 7b can be slidably arranged in the pulley slide groove section of the lower pulley group, and the two ends of the upper pulley line of the lower pulley group 7b pass through the upper pulley line groove section of the lower pulley group and are connected with a pair of the second vertical hooks 6b, and the two ends of the lower pulley line of the lower pulley group 7b pass through the lower pulley line groove section of the lower pulley group and are respectively connected with the first line joint 20 and the connecting pulley 15; the second vertical hook 6b drives the lower pulley group 7b to rise and fall in the pulley slide groove section of the lower pulley group as the knife is lifted; the upper electromagnet 3b is fixedly mounted on the electromagnet skeleton 9 At the upper end, 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, and the axial hole portions of a pair of upper armature hooks 4b are rotationally 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 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, and the intersecting magnetic pole surfaces of the upper electromagnet 3b 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 on the same side of the second rotating shaft 8b.

[0078] When the upper electromagnet 3b is energized, the upper armature hook 4b is held in a back closed magnetic circuit position that fits the corresponding magnetic pole of the upper electromagnet 3b under the attraction of the upper electromagnet 3b, and 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 away from the magnetic pole of the upper electromagnet 3b under the action of the second spring 5b, that is, it moves laterally from the back closed magnetic circuit position that fits the corresponding magnetic pole of the upper electromagnet 3b to a dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the upper electromagnet 3b, and 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.

[0079] See also Figure 3 As shown, the front magnetic circuit structure of the present invention is composed of a lower electromagnet 3a and two lower armature hooks 4a, see Figure 4 As shown, the back magnetic circuit structure of the present invention is composed of an upper electromagnet 3b and two upper armature hooks 4b.

[0080] See also Figure 5 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 5 It can be clearly seen that the left and right ends of the long magnetic pole 302 have first bent portions bent backward, and the left and right ends of the short magnetic pole 303 have second bent portions bent forward, and the first bent portion and the second bent portion are in a front-to-back misalignment form, and the misalignment amplitude is equal to the thickness of the straight rod portion 401. This is what makes the present invention different from the traditional solution. The iron core of the traditional solution is usually a planar structure with the magnetic poles facing the same direction, while the iron core of the present invention is actually a three-dimensional structure.

[0081] The concave surface of the first bending portion serves as a sliding magnetic pole surface 304, and the side end surface of the second bending portion serves as an attraction magnetic pole surface 305. The sliding magnetic pole surface 304 and the attraction magnetic pole surface 305 located on the same side constitute two intersecting magnetic pole surfaces. A magnetic plastic upper cover 306 is arranged in front of the sliding magnetic pole surface 304. There is a distance between the magnetic 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 elastic member 307 for contacting the straight rod portion 401 is arranged in the groove.

[0082] See also Figure 5As shown, the structures of the lower armature hook 4a and the upper armature hook 4b are mostly the same, both of which include a straight rod portion 401, a pole surface sliding contact portion 404, a pole surface suction contact portion 405, an axial hole portion 402, a hook tip portion 403 and a spring positioning column 406. The cross-section of the straight rod portion 401 is rectangular, but not limited to a rectangle. The axial hole portion 402 is arranged at one end of the straight rod portion 401 through the pole surface sliding contact portion 404, and the hook tip portion 403 is arranged at the other end of the straight rod portion 401 through the pole surface suction contact portion 405. The spring positioning column 406 is arranged on the side wall of the straight rod portion 401 facing the electromagnet; the hook tip portion 403 and the pole surface suction contact portion 405 are both on the same side of the corresponding rotating shaft.

[0083] See also Figure 3 and Figure 4 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.

[0084] See also Figure 6 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.

[0085] Limiting protrusions are arranged on the front and back surfaces of the spacer to prevent the armature hook from excessively moving outward laterally under the action of the spring, and the limiting protrusions do not interfere with the movement of the vertical hook in the vertical hook slide groove section of the upper pulley block and the vertical hook slide groove section of the lower pulley block.

[0086] See also Figure 3 and Figure 4As 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.

[0087] See also Figure 5 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.

[0088] See also Figure 1 and Figure 2 As shown, a pair of the first vertical hooks 6a are slidably disposed in the vertical hook slot section of the upper pulley block, and a pair of the second vertical hooks 6b are slidably disposed in the vertical hook slot section of the lower pulley block.

[0089] See also Figure 7 and Figure 8 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.

[0090] 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.

[0091] The distance from the bottom of the retaining section 604b to the bottom of the top hook 603 is greater than the distance from the hook tip of the top hook 603 to the bottom of the top hook 603. This distance difference is also the distance between the hook tip of the armature hook and the hook tip of the vertical hook in the unhooked state, so it is defined as the unhooking margin, which is a tolerance margin. Figure 7 As shown, Figure 7 C in the middle represents the unhooking margin. Due to the existence of the unhooking margin C, 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.

[0092] The length of the retaining section 604b of the convex edge corresponds to the tolerance range of the jacquard machine knife lifting height allowed by the needle selection device to which it belongs. Within the tolerance range, the armature hook in contact with the convex edge remains in the position of the dynamic magnetic gap 17. The retaining section 604b is actually a straight section. In this section of the retaining section 604b, the armature hook in contact with it will not have a lateral displacement, but will remain in the position of the dynamic magnetic gap 17. The dynamic magnetic gap 17 is the distance between the magnetic pole surface of the armature hook and the magnetic pole surface of the electromagnet under the action of the convex edge, and the value range of the dynamic magnetic gap 17 is 0 to 0.3 mm.

[0093] In the actual operation of the jacquard machine, due to the transmission mechanism and mechanical stress, there are errors in the position of the blade of multiple blades; the blade is up to 2 meters long (the blade of a large needle number jacquard machine is longer), and the blade will be deformed during work, resulting in errors in the position of different points on the same blade; the jacquard fabric pattern is different, resulting in uneven force on different positions of the same blade, and even different forces on both sides of the blade and at both ends of the blade will produce torsional torque, which will cause permanent deformation of the blade in severe cases. So there is a concept of "blade lifting tolerance", which refers to the range of the height difference of the blade edge allowed by the needle selection device. Obviously, the needle selection device with a large "blade lifting tolerance" is conducive to the operation of the jacquard machine. The present invention is provided with a retaining section of the convex edge, so that within a relatively wide range, the armature hook can be kept in a smaller dynamic magnetic gap. When the electromagnet coil is energized, the armature hook can be smoothly attracted to the closed magnetic circuit position, thereby realizing the state conversion of the vertical hook from "hanging" to "taking off", widening the "blade lifting tolerance". This is an important tolerance margin, which reduces the accuracy requirements of the needle selection device on the jacquard machine's knife position and improves the reliability of the jacquard machine's overall motion switching.

[0094] 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 upper pulley block vertical hook slot section and the upper pulley block vertical hook slot section of the first 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 upper pulley block vertical hook slot section and the upper pulley block vertical hook slot section. Since the dynamic magnetic gap 17 is generated by the convex edge, it has certain precision requirements. Therefore, in order to ensure precision, it is necessary to ensure that the motion trajectory of the vertical hook is stable, and when the vertical hook moves up and down, it is ensured that there is no other lateral displacement, otherwise the size of the dynamic magnetic gap cannot be controlled.

[0095] At least one damping groove 606 is provided between the side ear 602 and the rod-shaped body 601 to block the vibration of the knife lifting, so as to prevent the vibration of the knife lifting from being transmitted to the top hook 603 through the side ear 602, thereby improving the reliability of the operation. The number of the damping grooves 606 can be designed according to the requirements, for example, it can be designed as follows: Figure 7 The single slot method shown can also be designed as Figure 8 Double slot method shown.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] from Figure 5 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.

[0100] from Figure 5 It 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.

[0101] The advantage of the rotating shaft at the magnetic pole is that it has a constant magnetic resistance. If the rotating shaft is simply moved away from the magnetic pole position, a double-end magnetic gap will be formed, that is, the armature hook forms an active magnetic gap with changing magnetic resistance at both magnetic poles of the I-beam core, which is more difficult to control. The technical solution of the present invention also has the characteristic of basically stable magnetic resistance in the plane sliding magnetic gap, avoiding the aforementioned double-end magnetic gap. This spatial twisted magnetic circuit design also achieves a purpose, that is, through the twisting of the magnetic circuit, the electromagnet located in the middle position is connected to the armature hooks located on both sides, so that two sets of independent needle selection devices can be accommodated in one unit.

[0102] The magnetic pole end of the armature hook of the present invention can move between three positions: from the static magnetic gap 18 to the dynamic magnetic gap 17 is a section with a larger range, which is achieved by the vertical hook convex edge pushing the armature hook to move horizontally when the vertical hook moves upward (using external force to achieve a larger range of displacement); from the dynamic magnetic gap 17 to the closed magnetic circuit position is a section with a smaller range, which is achieved by the electromagnetic force after the electromagnet is energized (using internal force to achieve a smaller range of displacement).

[0103] See also Figure 3 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.

[0104] It is very important to limit the dynamic magnetic gap 17 to a relatively small range, such as 0 to 0.3 mm. This is the key to the present invention and is also a tolerance margin issue. In the case of a small magnetic gap, the electromagnet coil can generate sufficient attraction with less power consumption to attract the armature hook to the magnetic pole and maintain this state. It is not impossible to limit the dynamic magnetic gap 17 to 0.4 mm, but a simple calculation shows that the electromagnet needs about 80% more electromagnetic force, which is obviously not conducive to low-power design. Of course, the power consumption is lower when the dynamic magnetic gap 17 is set to 0.2 mm, but this value also has the function of offsetting the processing errors, assembly errors, and deformation errors of various parts during operation. Therefore, setting the dynamic magnetic gap to 0.2 mm means that the precision requirements for the parts are higher, which increases the cost.

[0105] See also Figure 3 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.

[0106] See also Figure 4 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.

[0107] See also Figure 4As 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.

[0108] See also Figure 1 and Figure 2 As shown, the upper pulley block 7a can be slidably arranged in the pulley chute section of the upper pulley block, and the lower pulley block 7b can be slidably arranged in the pulley chute section of the lower pulley block. The upper pulley block 7a and the lower pulley block 7b are stacked in an up-and-down dislocation manner on the front and back sides of the first substrate. The upper pulley line ends of the upper pulley block 7a are respectively connected to the bottom ends of a pair of the first vertical hooks 6a, and the first vertical hooks 6a drive the upper pulley block 7a to slide up and down in the pulley chute section of the upper pulley block through the upper pulley line. The upper pulley line ends of the lower pulley block 7b are respectively connected to the bottom ends of a pair of the second vertical hooks 6b, and the second vertical hooks 6b drive the lower pulley block 7b to slide up and down in the pulley chute section of the upper pulley block through the upper pulley line.

[0109] join Fig. 9 As shown, the upper pulley block 7a and the lower pulley block 7b have the same structure, both of which include two mounting plates 701, two movable pulleys 702, two ball bearings 703, two movable pulley shafts 704, a bracket pressing protrusion 705 and a bracket pressing hole 706; the two movable pulleys 702 are respectively arranged at the upper and lower ends of the pulley bracket formed by the two mounting plates 701 through their respective corresponding pairs of ball bearings 703 and the movable pulley shafts 704; and the two movable pulleys 702 are respectively equipped with an upper pulley line and a lower pulley line of adapted thickness; the widths of the two mounting plates 701 are both smaller than the diameters of the movable pulleys 702; the thicknesses of the two mounting plates 701 are equal, so as to serve as positioning sliders when the lifting pulley block moves on the front slot plate or the back slot plate of the first substrate 1.

[0110] The mounting plate 701 and the movable pulley shaft 704 are both plastic parts, which can be pressed together at high temperature, so that the entire bracket of the lifting pulley block becomes a stable whole. The ball bearing 703 allows the lifting pulley block to bear a large load.

[0111] Lifting pulley block: refers to a movable pulley block, which includes two upper and lower pulleys. The lifting pulley block mainly shortens the stroke in the needle selection unit, that is, the stroke of the lifting pulley block is 1 / 2 of the knife lifting stroke, which is equivalent to the upper pulley of the lifting pulley block "storing" 1 / 2 of the knife lifting stroke, and then releasing it through the lower pulley. The three-position / multi-position uses this principle. The upper pulley line is in parallel, and the lower pulley line is in series. The lower pulley line can release the stroke "stored" by multiple upper pulleys.

[0112] Pulley line: The line acting on the pulley, there are two sections of pulley line, the one acting on the upper pulley is called the upper pulley line, and the one acting on the lower pulley is called the lower pulley line. Usually in the lifting pulley group, the upper pulley line is the driving side, and the lower pulley line is the output side, connected to the load. In the present invention, the vertical hook connected to the end of the upper pulley line is driven by the lifting knife, and one end of the lower pulley line is fixed, and the other end is the "head line", which connects the harness and heald to control the up and down movement of the warp yarn, and is the load.

[0113] The lifting pulley block can be installed with ball bearings or sliding bearings. Under the current pulley block structure, the load-bearing effect of ball bearings is significantly better than that of sliding bearings. However, ball bearings are limited by the balls and bearing brackets and are difficult to reduce in thickness. The pulley line itself is thin, and the space occupied by its line groove is also thin. The present invention arranges the thicker pulley assembly and the thinner pulley line groove in a corresponding and complementary manner on the left and right, and the two thicker pulley assemblies are stacked and staggered up and down, thereby realizing a high-density arrangement of the thicker ball bearing pulley block. This solution can also be well adapted to high-speed and high-load occasions.

[0114] The high-density needle selection device of the present invention does not reduce the number of parts, but arranges the space reasonably, the relative position of the parts is more compact, and the precision requirement is correspondingly improved. In the design of the electromagnet, the suction force of the electromagnet is basically positively correlated with the volume. Therefore, to ensure the suction force of the electromagnet, the space of the electromagnet must be ensured. The present invention adopts a double electromagnet stacked up and down, which actually maintains the volume of a single electromagnet, thereby ensuring that the electromagnet has sufficient suction. The electromagnet skeleton is to relatively fix the position relationship of the electromagnet magnetic poles, facilitate production and assembly, ensure precision, and is a quality guarantee for mass production.

[0115] The connecting pulley 15 is installed in the interlayer of the extension piece 10 tilted to the left or right to bridge the upper and lower lifting pulley blocks, so that the lower pulley lines of the front and rear lifting pulley blocks can smoothly access the lower edge of the connecting pulley 15 from both sides and connect to form a lower pulley line shared by the front and rear lifting pulley blocks.

[0116] The inclination direction of the connecting pulley 15 is determined by the inclination direction of the connecting pulley installation surface in the interlayer of the extension piece 10 .

[0117] See also Fig.10 As shown, when the connecting pulley installation surface is tilted to the right, the extension piece 10 is a type 1 extension piece with a Z-shaped structure in the longitudinal section, and the connecting pulley 15 is tilted to the right. Figure 1 As shown, when the connecting pulley 15 tilted to the right is used, the left end 21a of the lower pulley line of the upper pulley group and the right end 22b of the lower pulley line of the lower pulley group are smoothly connected at the lower edge of the connecting pulley 15, that is, connected in a forward oblique line manner, thereby forming a first needle selection device unit.

[0118] See also Fig.11 As shown in FIG. 1 , when the connecting pulley mounting surface is tilted to the left, the extension piece 10 is a type 2 extension piece with a reverse Z-shaped structure in the longitudinal section, and the connecting pulley 15 is tilted to the left. Figure 2 As shown, when the connecting pulley 15 tilted to the left is used, the right end 21b of the lower pulley line of the upper pulley block and the left end 22a of the lower pulley line of the lower pulley block are smoothly connected at the lower edge of the connecting pulley 15, that is, connected in a reverse diagonal manner, thereby forming a second needle selection device unit.

[0119] The difference between the second needle selection device unit and the first needle selection device unit is that different types of extension plates are used, so the outlet positions of the first lines of the lower pulleys of the two are staggered, so that when multiple first needle selection device units and second needle selection device units are combined into an assembly, the outlet positions of the first lines are staggered at intervals.

[0120] See also Fig.13 and Fig.14 As shown, two connecting pulleys 15 can also be provided on the type 1 extension plate and the type 2 extension plate, so that the stress of the three-position first line can be dispersed to both sides of the first substrate 1, avoiding the situation where the jacquard stress is all concentrated on the central axis of the first substrate 1, which is beneficial to the long-term stable operation of the first substrate 1.

[0121] It should be noted that the actual extension piece 10 is a front and rear piece that clamps and fixes the connecting pulley. Figure 1 , Figure 2 , Fig.11 , Fig.12 , Fig.13 and Fig.14 In order to see the middle connecting pulley 15 and the tilting situation, the front piece is hidden.

[0122] The present invention connects the lower pulley lines of the front and rear lifting pulley groups in series through the connecting pulley 15 to form a lower pulley line shared by the front and rear lifting pulley groups, thereby realizing the output of the first line at three positions. Fig.15 As shown, Fig.15 For example, from left to right in the figure are:

[0123] When the two first vertical hooks 6a and the two second vertical hooks 6b are both at the high position U, the upper pulley block 7a and the lower pulley block 7b drive the first line joint to the high position through the common lower pulley line, and the first line output position is at the first working position P1.

[0124] When the first vertical hook 6a and the two second vertical hooks 6b on the left are both at the high position U, and the first vertical hook 6a on the right is at the low position D, the upper pulley block 7a and the lower pulley block 7b drive the first line joint to the middle position through the common lower pulley line, and the first line output position is at the second working position P2. The height difference between the second working position P2 and the first working position P1 is an opening stroke.

[0125] When the first vertical hook 6a on the left and the second vertical hook 6b on the left are both in the high position U, the first vertical hook 6a on the right and the second vertical hook 6b on the right are both in the low position D, the upper pulley block 7a and the lower pulley block 7b drive the first line joint to the low position through the common lower pulley line, and the first line output position is at the third working position P3. The drop difference between the third working position P3 and the second working position P2 is one opening stroke, and the drop difference between the third working position P3 and the first working position P1 is two opening strokes.

[0126] It can be seen that when the lower pulley lines of the upper pulley block 7a and the lower pulley block 7b are connected in series, the following effects can occur:

[0127] When the needles of the upper pulley block 7a and the lower pulley block 7b are both at high positions, the first line output is also at high position, which is the first working position P1;

[0128] When one of the upper pulley block 7a and the lower pulley block 7b is in the low position and the other is in the high position, the first line output falls a stroke, which is the second working position P2;

[0129] When the needles of the upper pulley block 7a and the lower pulley block 7b are both in the low position, the first line output drops two strokes, which is the third working position P3.

[0130] See also Fig.16 As shown, based on the above-mentioned needle selection device unit, the present invention can also be made into an 8-needle compact three-position needle selection device assembly formed by stacking 4 of the above-mentioned compact three-position needle selection devices.

[0131] It should be noted that the technical solution of the present invention is not limited to the production of 8-needle compact three-position needle selection device components, but can also be used to produce higher-density compact three-position needle selection device components.

[0132] The present invention can also be made into an electronic jacquard machine, which is equipped with the above-mentioned compact three-position needle selection device assembly.

[0133] 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 compact three-position needle selection device, characterized in that: The invention comprises a first substrate (1) and a second substrate (2) which are assembled together front and back; a pair of vertical hooks and a group of lifting pulley groups are slidably arranged on the front groove plate and the back groove plate of the first substrate (1), and the upper and lower groups of the lifting pulley groups are stacked in an up-and-down manner through the concave-convex design structure of the first substrate (1) itself, and the front and rear pairs of the vertical hooks respectively drive the upper and lower groups of the lifting pulley groups to slide up and down through the corresponding upper pulley lines; two electromagnets stacked up and down are arranged on the spacer at the top of the first substrate (1) through the electromagnet skeleton (9), and the two electromagnets have two upper and lower intersecting magnetic pole surfaces and can cooperate with their respective corresponding pairs 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 hole parts of the two pairs of armature hooks are respectively rotatably connected to the corresponding rotating shafts on the front and back sides of the spacer, and the rear side surfaces of the hook tips of the two pairs of armature hooks are respectively elastically connected to the left and right sides of the electromagnet skeleton (9) through springs; The bottom of the first substrate (1) is provided with one or two connecting pulleys (15) with ball bearings through an extension sheet (10), and one end of the lower pulley line of the upper and lower two groups of the lifting pulley groups is connected after being smoothly transitioned through the lower edge of the connecting pulley (15) in a forward slash or reverse slash manner to form a lower pulley line shared by the two lifting pulley groups, one end of the shared lower pulley line is fixed, and the other end is connected to the first connector output, so that the first line output at three positions can be realized, namely: When the four vertical hooks on both sides are in high position, the first line output position is in the first working position; When one of the vertical hooks on the front and the two vertical hooks on the back are both in high positions, and the other vertical hook on the front is in low position, the first line output position is in the second working position; the height difference between the second working position and the first working position is an opening stroke; When a vertical hook on the front and a vertical hook on the back are both in high positions, and another vertical hook on the front and another vertical hook on the back are in low positions, the first-line output position is in the third working position; the difference in height between the third working position and the second working position is one opening stroke, and the difference in height between the third working position and the first working position is two opening strokes.

2. The compact three-position needle selection device according to claim 1, characterized in that: The connecting pulley (15) is installed in the interlayer of the extension piece (10) tilted to the left or right so as to bridge the upper and lower lifting pulley groups, so that the lower pulley lines of the front and rear lifting pulley groups can smoothly access the lower edge of the connecting pulley (15) from both sides and connect to form a three-position head line; The inclination direction of the connecting pulley (15) is determined by the inclination direction of the connecting pulley mounting surface in the interlayer of the extension sheet (10). When the connecting pulley installation surface is tilted to the right, the extension piece (10) is a type 1 extension piece with a Z-shaped longitudinal section. 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 upper pulley block with the right end of the lower pulley line of the lower pulley block, that is, connected in a forward oblique line manner; When the connecting pulley mounting surface is tilted to the left, the extension piece (10) is a type 2 extension piece with a reverse Z-shaped structure in longitudinal section. 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 upper pulley block with the left end of the lower pulley line of the lower pulley block, that is, connected in a reverse oblique manner.

3. The compact three-position needle selection device according to claim 1, characterized in that: The front groove plate of the first substrate (1) is provided with four functional sections from top to bottom, namely, a fully linear upper pulley block vertical hook slide groove section, an upper pulley block upper pulley line groove section, an upper pulley block pulley slide groove section, and an upper pulley block lower pulley line groove section; the back groove plate of the first substrate (1) is provided with four functional sections from top to bottom, namely, a fully linear lower pulley block vertical hook slide groove section, an upper pulley block upper pulley line groove section, a lower pulley block pulley slide groove section, and a lower pulley block lower pulley line groove section; The upper pulley block vertical hook slot section and the lower pulley block vertical hook slot section are located front to back and have the same thickness; the upper pulley block pulley slot section and the lower pulley block upper pulley line slot section are located front to back, and the thickest pulley block bracket section of the upper pulley block pulley slot section is located at the center of the first substrate (1), while the lower pulley block upper pulley line slot section is located on both sides of the first substrate (1), and there is no conflict in space and they can be nested; the upper pulley block lower pulley line slot section and the lower pulley line slot section of the lower pulley block The line groove section corresponds to the position of the lower pulley block pulley groove section in front and back, and the lower pulley line groove section of the upper pulley block is located on both sides of the first substrate (1), and does not conflict with the pulley block bracket section of the lower pulley block pulley groove section located at the center of the first substrate (1); the upper pulley block pulley groove section and the lower pulley block pulley groove section are designed to be stacked up and down on the front and back sides, and the upper pulley block pulley groove section and the lower pulley block pulley groove section have the same thickness.

4. The compact three-position 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 the same structure; the two lifting pulley blocks are respectively an upper pulley block (7a) and a lower pulley block (7b) of the same structure; the two electromagnets stacked up and down are respectively an upper electromagnet (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 the same structure; the two pairs of rotating shafts are respectively a first rotating shaft (8a) and a second rotating shaft (8b) of the same structure; The structure in the front groove plate of the first substrate is that a pair of the first vertical hooks (6a) are respectively slidably arranged on the left and right sides of the vertical hook sliding groove section of the upper pulley block, and the upper pulley block (7a) is slidably arranged in the pulley sliding groove section of the upper pulley block, and the two ends of the upper pulley line of the upper pulley block (7a) are connected to the pair of the first vertical hooks (6a) after passing through the upper pulley line groove section of the upper pulley block, and the two ends of the lower pulley line of the upper pulley block (7a) are respectively fixed and connected to the connecting pulley (15) after passing through the lower pulley line groove section of the upper pulley block; the first vertical hook (6a) is in the vertical hook sliding groove of the upper pulley block The upper pulley block (7a) is driven to rise and fall in the pulley slide groove section of the upper pulley block as the knife is lifted and lowered; the lower electromagnet (3a) is fixedly mounted at the lower end of the electromagnet skeleton (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 first vertical hooks (6a) through a pair of first springs (5a). The corresponding points on the left and right sides of the lower part of the electromagnet skeleton (9) are elastically connected, and the intersecting magnetic pole surfaces of the lower electromagnet (3a) respectively 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 corresponding to the magnetic pole of the lower electromagnet (3a) under the attraction of the lower electromagnet (3a). The lower electromagnet (3a) is in a closed magnetic circuit position with a front face that fits the corresponding magnetic pole and is maintained, at which 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 a front face that fits the corresponding magnetic pole of the lower electromagnet (3a) to a dynamic magnetic gap position close to the direction of the corresponding magnetic pole of the lower electromagnet (3a) under the action of the first spring (5a), at which 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 in the back groove plate of the first substrate is that a pair of the second vertical hooks (6b) are respectively slidably arranged on the left and right sides of the vertical hook sliding groove section of the lower pulley group, and the lower pulley group (7b) is slidably arranged in the pulley sliding groove section of the lower pulley group. The two ends of the upper pulley line of the lower pulley group (7b) are connected to the pair of second vertical hooks (6b) after passing through the upper pulley line groove section of the lower pulley group, and the two ends of the lower pulley line of the lower pulley group (7b) are respectively connected to the first line joint (20) and the connecting pulley (15) after passing through the lower pulley line groove section of the lower pulley group; the second vertical hook (6b) is arranged on the lower pulley group The vertical hook slide groove section of the wheel group drives the lower pulley group (7b) to rise and fall in the pulley slide groove section of the lower pulley group as the knife is lifted and lowered; the upper electromagnet (3b) is fixedly installed on 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 the 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 the pair of upper armature hooks (4b) are respectively connected through a pair of second springs (5 b) is elastically connected to corresponding points on the left and right sides of the upper part of the electromagnet skeleton (9), the intersecting magnetic pole surfaces of the upper electromagnet (3b) respectively 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) under the attraction of the upper electromagnet (3b) The upper armature hook (4b) is moved to a back closed magnetic circuit position that is in contact with the corresponding magnetic pole of the upper electromagnet (3b) and maintained therein, at which 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 laterally moved from the back closed magnetic circuit position that is in contact with the corresponding magnetic pole of the upper electromagnet (3b) to a 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 which 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 compact three-position 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 compact three-position 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 compact three-position needle selection device according to claim 1, characterized in that: The lifting pulley block comprises two mounting plates (701), two movable pulleys (702), two ball bearings (703), two movable pulley shafts (704), a bracket pressing protrusion (705) and a bracket pressing hole (706); the two movable pulleys (702) are respectively arranged at the upper and lower ends of a pulley bracket formed by splicing the two mounting plates (701) through a corresponding pair of ball bearings (703) and the movable pulley shaft (704); and the two movable pulleys (702) are respectively equipped with an upper pulley line and a lower pulley line of matching thickness; the widths of the two mounting plates (701) are both smaller than the diameters of the movable pulleys (702); and the thicknesses of the two mounting plates (701) are equal, so as to serve as positioning sliders when the lifting pulley block moves on the front groove plate or the back groove plate of the first substrate (1).

8. The compact three-position 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 spacer at the top of the second substrate (2); the heat sink (16) is attached to the side surface of the spacer at the top of the second substrate (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 compact three-position needle selection device assembly, characterized in that: The invention discloses an 8-needle compact three-position needle selection device assembly formed by stacking four compact three-position needle selection devices as described in any one of claims 1 to 8.

10. An electronic jacquard machine, characterized in that: The electronic jacquard machine is equipped with the compact three-position needle selection device assembly as claimed in claim 9.

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