A double-layer pulley groove plate and a needle selection device and a jacquard equipped with the groove plate

Abstract

The application discloses a double-layer pulley set groove plate and a needle selecting device and a jacquard equipped with the groove plate, comprising a second base sheet, a first base sheet, a second base sheet which are sequentially spliced or a first base sheet, a second base sheet, a first base sheet which are sequentially spliced. The right groove type of the second base sheet and the left groove type of the first base sheet are spliced to form an upper pulley set vertical hook sliding groove section, an upper pulley set upper pulley line groove section, an upper pulley set pulley sliding groove section and an upper pulley set lower pulley line groove section; the right groove type of the first base sheet and the left groove type of the second base sheet are spliced to form a lower pulley set vertical hook sliding groove section, a lower pulley set upper pulley line groove section, a lower pulley set pulley sliding groove section and a lower pulley set lower pulley line groove section; the application improves the installation density of the pulley set, and two sets of pulley sets are installed under the condition that the thickness of the original pulley set is unchanged. The groove plate is good in sealing property, avoids the influence of the flower hair and dust on the pulley set, long in service life, convenient for large-scale production, easy to install and simple to maintain.

Description

Technical Field

[0001] This invention belongs to the technical field of electronic jacquard machines in textile machinery, specifically relating to a double-layer pulley system groove plate and a needle selection device equipped with this groove plate, and a jacquard machine. Background Technology

[0002] In recent years, electronic jacquard machines have made significant progress. A key component of an electronic jacquard machine is the needle selector assembly (also called the assembly), which is the actuating part of the machine and converts electrical signals into the raising and lowering of warp yarns. Jacquard machines are divided into single-action and double-action types. The double-action type has a more complex mechanism; one jacquard needle (first thread) corresponds to two vertical hooks, and the two vertical hooks are converted into the raising and lowering of one jacquard needle (first thread) through a pulley system. The double-action type causes less damage to the warp yarns, which is beneficial for weaving, and most electronic jacquard machines currently used are double-action.

[0003] As electronic jacquard machines evolve towards higher needle counts, new requirements inevitably arise for the density of the needle selector assembly. Otherwise, the jacquard machine would become too large to be compatible with the knitting machine, thus creating a demand for high-density needle selector assemblies. Double-layer technology is one approach to increasing the density of the needle selector assembly, including double-layer electromagnets and double-layer pulley blocks. Currently, jacquard machine pulley blocks come in two forms: open type and grooved plate type.

[0004] Open-type pulley blocks have all their pulleys and pulley lines exposed, without any partitions or obstructions. While open-type blocks are less expensive, they require a significant amount of installation and debugging work, are prone to accumulating lint during operation, and are inconvenient to maintain. They are mostly used for long-filament, non-woven fabrics. Grooved pulley blocks install the pulleys and pulley lines in a plastic groove, forming a needle-selecting unit together with the electromagnet and armature hook. Typically, eight needle-selecting units make up one needle-selecting assembly, which is then installed as a unit. The upper part of the needle-selecting assembly contains the electromagnet and armature hook, while the lower part contains the pulley block, pulley line, and a groove for the vertical movement of the limiting pulley block; there is also a vertical hook guide groove to limit and guide the vertical movement of the vertical hook.

[0005] While grooved pulley blocks are more expensive, they are easier to install and maintain, as each component can be disassembled, replaced, and maintained individually. Furthermore, grooved pulley blocks offer better sealing. Because the pulleys move under the guidance and constraint of the grooves, their smoothness and vibration resistance are significantly better than open pulley blocks (open pulley blocks have suspended pulleys that vibrate and sway during high-speed movement, potentially interfering with adjacent pulley blocks or pulley lines). Since they are isolated from adjacent pulley blocks and pulley lines, they do not interfere with each other, allowing for higher design density.

[0006] The existing needle selector assembly has a needle selection unit with dimensions (fabric projection size) of 5mm * 35mm, where 35mm represents the direction of the lifting blade distribution. This dimension involves two sets of conjugate moving lifting blades and is the core mechanical structure and motion drive of the jacquard machine. Therefore, this dimension cannot be changed, as changing it would be equivalent to completely redesigning the entire jacquard machine. The only possible improvement is to increase the density within this 5mm dimension. Two technical solutions are possible: One approach is to reduce the thickness of the pulley blocks. If the thickness could be reduced to 2.4mm, two pulley blocks could be installed side-by-side, achieving double the density. However, the 2.4mm ultra-thin pulley block solution is limited by ultra-thin ball bearings, suitable for jacquard machine pulleys with ball bearings less than 2mm thick, which is currently difficult to achieve. Therefore, another technical solution is to retain the current pulley block structure using ball bearings and adopt a staggered, stacked installation method, which could potentially achieve double the density within a 5mm thickness space. Summary of the Invention

[0007] To overcome the shortcomings of the prior art, the present invention provides a double-layer pulley system groove plate and a needle selection device and jacquard machine equipped with this groove plate.

[0008] To solve the above-mentioned technical problems and achieve the above-mentioned technical effects, the present invention is implemented through the following technical solution: A double-layer pulley system trough plate includes a second substrate, a first substrate, and a second substrate assembled from left to right, or a first substrate, a second substrate, and a first substrate assembled from left to right. The groove on the right side of the second substrate and the groove on the left side of the first substrate are combined to form the upper pulley assembly functional layer. The upper pulley assembly functional layer is divided into four functional segments from top to bottom: the upper pulley assembly vertical hook groove segment, the upper pulley assembly upper pulley line groove segment, the upper pulley assembly pulley groove segment, and the upper pulley assembly lower pulley line groove segment. The groove on the right side of the first substrate and the groove on the left side of the second substrate are combined to form a sliding wheel assembly functional layer. The sliding wheel assembly functional layer is divided into four functional segments from top to bottom: the vertical hook groove segment of the sliding wheel assembly, the upper pulley line groove segment of the sliding wheel assembly, the pulley groove segment of the sliding wheel assembly, and the lower pulley line groove segment of the sliding wheel assembly. The upper pulley assembly functional layer and the lower pulley assembly functional layer are arranged to overlap horizontally with respect to the first substrate or the second substrate. The vertical hook groove section of the upper pulley assembly corresponds to the vertical hook groove section of the lower pulley assembly in terms of left and right positions and has the same thickness. The pulley groove section of the upper pulley assembly corresponds to the upper pulley groove section of the lower pulley assembly in terms of left and right positions. The thickest pulley support section of the upper pulley groove section is located at the center of the groove plate, while the upper pulley groove section of the lower pulley assembly is located at... The two sides of the groove plate can be nested without spatial conflict; the groove segment of the upper pulley group corresponds to the left and right position of the groove segment of the lower pulley group, and the groove segment of the upper pulley group is located on both sides of the groove plate, without conflicting with the pulley group support segment of the groove segment of the lower pulley group located at the center of the groove plate; the groove segment of the upper pulley group and the groove segment of the lower pulley group have the same thickness, and are designed to be stacked in a staggered manner on the left and right sides.

[0009] Furthermore, both the first substrate and the second substrate are plastic parts formed by injection molding in one step. The left and right sides of the first substrate and the second substrate are respectively provided with buckles. The right side of the second substrate and the left side of the first substrate are superimposed and spliced ​​through the corresponding buckles. The right side of the first substrate and the left side of the second substrate are superimposed and spliced ​​through the corresponding buckles.

[0010] Furthermore, when the second substrate, the first substrate, and the second substrate are assembled, the first substrate in the middle is used as the central substrate. At this time, the top of the first substrate is provided with two sets of electromagnets and armature hook mounting positions stacked vertically, and the tops of the two second substrates on both sides are respectively provided with heat sinks corresponding to the positions of their respective electromagnets. When the first substrate, the second substrate, and the first substrate are combined, the second substrate in the middle is used as the central substrate. At this time, the top of the second substrate is provided with two sets of electromagnets and armature hook mounting positions stacked vertically, and the tops of the two first substrates on both sides are respectively provided with heat sinks corresponding to the positions of their respective electromagnets.

[0011] Furthermore, the grooves on the left side of the first substrate, from top to bottom, are: the first half of the vertical hook groove of the upper pulley group, the first half of the upper pulley line groove of the upper pulley group, the first half of the pulley groove of the upper pulley group, and the first half of the lower pulley line groove of the upper pulley group; the grooves on the right side of the second substrate, from top to bottom, are: the second half of the vertical hook groove of the upper pulley group, the second half of the upper pulley line groove of the upper pulley group, the second half of the pulley groove of the upper pulley group, and the second half of the lower pulley line groove of the upper pulley group. When the right side of the second substrate is joined with the left side of the first substrate, the second half of the vertical hook sliding groove of the upper pulley group and the first half of the vertical hook sliding groove of the upper pulley group are joined to form the vertical hook sliding groove segment of the upper pulley group. The second half of the upper pulley line groove of the upper pulley group and the first half of the upper pulley line groove of the upper pulley group are joined to form the upper pulley line groove segment of the upper pulley group. The second half of the pulley sliding groove of the upper pulley group and the first half of the pulley sliding groove of the upper pulley group are joined to form the pulley sliding groove segment of the upper pulley group. The second half of the lower pulley line groove of the upper pulley group and the first half of the lower pulley line groove of the upper pulley group are joined to form the lower pulley line groove segment of the upper pulley group.

[0012] The grooves on the right side of the first substrate, from top to bottom, are: the first half of the vertical hook groove of the lower slide wheel assembly, the first half of the upper pulley line groove of the lower slide wheel assembly, the first half of the pulley groove of the lower slide wheel assembly, and the first half of the lower slide wheel line groove of the lower slide wheel assembly; the grooves on the left side of the second substrate, from top to bottom, are: the second half of the vertical hook groove of the lower slide wheel assembly, the second half of the upper pulley line groove of the lower slide wheel assembly, the second half of the pulley groove of the lower slide wheel assembly, and the second half of the lower slide wheel line groove of the lower slide wheel assembly. When the right side of the first substrate and the left side of the second substrate are joined together, the first half of the vertical hook side groove of the lower slide wheel assembly and the second half of the vertical hook side groove of the lower slide wheel assembly are joined together to form the vertical hook side groove segment of the lower slide wheel assembly. The first half of the upper pulley line groove of the lower slide wheel assembly and the second half of the upper pulley line groove of the lower slide wheel assembly are joined together to form the upper pulley line groove segment of the lower slide wheel assembly. The first half of the pulley side groove of the lower slide wheel assembly and the second half of the pulley side groove of the lower slide wheel assembly are joined together to form the pulley side groove segment of the lower slide wheel assembly. The first half of the lower slide line groove of the lower slide wheel assembly and the second half of the lower slide line groove of the lower slide wheel assembly are joined together to form the lower slide line groove segment of the lower slide wheel assembly.

[0013] Furthermore, the lower side end face of the first substrate and the lower side end face of the second substrate are respectively provided with positioning notches for judging whether the two are correctly assembled. When the first substrate and the second substrate are assembled with the correct side groove shape facing each other, the positioning notch on the first substrate and the positioning notch on the second substrate fit together left and right.

[0014] Furthermore, the second substrate and the first substrate are joined together to form an A-type single-layer grooved plate section; each of the grooves in the A-type single-layer grooved plate section can accommodate a set of upper pulley assemblies and corresponds to a needle selection unit; Multiple identical A-type single-layer slotted plate sections are stacked sequentially from left to right and then joined together with a second substrate on the far right to form a set of A-type multi-layer slotted plate assemblies. The slots formed between two adjacent A-type single-layer slotted plate sections can accommodate a set of pulley assemblies and each corresponds to a needle selection unit. This allows a set of type A multi-layer slot plate assemblies to correspond to multiple needle selection units, thereby meeting the requirements of the needle selector assembly; Alternatively, the first substrate and the second substrate can be assembled from left to right to form a B-type single-layer grooved plate section; each of the B-type single-layer grooved plate sections can accommodate a set of pulley assemblies and corresponds to a needle selection unit; Multiple identical type B single-layer slotted plate sections are stacked sequentially from left to right and then joined together with a first substrate on the far right to form a type B multi-layer slotted plate assembly. The slots formed between two adjacent type B single-layer slotted plate sections can accommodate a set of upper pulley assemblies and each corresponds to a needle selection unit. This allows a set of type B multi-layer slot plate assemblies to correspond to multiple needle selection units, thereby meeting the needs of the needle selector assembly.

[0015] Furthermore, the upper, middle, and lower portions of the first substrate and the second substrate are respectively provided with fixing sections, and each fixing section is provided with a through hole. Multiple A-type single-layer groove plate sections or multiple B-type single-layer groove plate sections are stacked and fixed by fasteners cooperating with the through holes.

[0016] A double-layer pulley system includes the aforementioned double-layer pulley system groove plate, as well as an upper pulley assembly and a lower pulley assembly; The upper pulley assembly includes an upper pulley vertical hook pair, an upper pulley line of the upper pulley group, an upper pulley group, a lower pulley line of the upper pulley group, and a first line connector of the upper pulley group; The lower pulley assembly includes a pair of vertical hooks for the lower pulley group, a lower pulley group, an upper pulley line for the lower pulley group, a lower pulley line for the lower pulley group, and a first line connector for the lower pulley group. The upper pulley group vertical hook pair and the lower pulley group vertical hook pair are respectively movably arranged in the upper pulley group vertical hook groove section and the lower pulley group vertical hook groove section; the upper pulley group and the lower pulley group are respectively movably arranged in the upper pulley group pulley groove section and the lower pulley group pulley groove section; the upper pulley group and the lower pulley group are stacked in a staggered manner within the double-layer pulley group groove plate; The two ends of the upper pulley line of the upper pulley group pass over the lower edge of the upper pulley of the upper pulley group and then extend upward through the groove section of the upper pulley line to connect with the two vertical hooks of the vertical hook pair of the upper pulley group, respectively; the two ends of the lower pulley line of the upper pulley group pass over the upper edge of the lower pulley of the upper pulley group and then extend downward through the groove section of the lower pulley line, respectively; the first line connector of the upper pulley group is connected to one of the downward extending ends of the lower pulley line of the upper pulley group; The two ends of the upper pulley line of the lower pulley assembly pass over the lower edge of the upper pulley of the lower pulley assembly and then pass upward through the groove section of the upper pulley line of the lower pulley assembly to connect with the two vertical hooks of the vertical hook pair of the lower pulley assembly respectively; the two ends of the lower pulley line of the lower pulley assembly pass over the upper edge of the lower pulley of the lower pulley assembly and then pass downward through the groove section of the lower pulley line of the lower pulley assembly respectively; the first line connector of the lower pulley assembly is connected to one of the downward-leading ends of the lower pulley line of the lower pulley assembly.

[0017] A needle selector assembly equipped with the aforementioned grooved double-layer pulley system.

[0018] A jacquard machine equipped with the aforementioned needle selector assembly.

[0019] The beneficial effects of this invention are as follows: The double pulley block groove plate of this invention increases the installation density of the pulley assembly, allowing for the installation of two sets of pulley assemblies while maintaining the same thickness as a single pulley block. Furthermore, compared to existing open-type jacquard machine pulley blocks, the double pulley block groove plate of this invention has a compact structure, good sealing performance, minimizes the impact of lint and dust on the pulley assembly, has a longer service life, and is easy to install and maintain, making it suitable for mass production.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the groove-shaped structure on the left side of the first substrate in this invention; Figure 2 This is a schematic diagram of the right side groove structure of the first substrate in this invention; Figure 3 This is a schematic diagram of the right side groove structure of the second substrate in this invention; Figure 4 This is a schematic diagram of the groove-shaped structure on the left side of the second substrate in this invention; Figure 5 This is an exploded view of an embodiment of the type A double-layer grooved plate of the present invention; Figure 6 This is an exploded view of an embodiment of the type B double-layer grooved plate of the present invention; Figure 7This is an exploded view of an embodiment of the type A multilayer slotted plate assembly of the present invention; Figure 8 This is an exploded view of an embodiment of the Type B double-layer groove plate assembly of the present invention; Figure 9 This is an exploded view of an embodiment of the Type A double-layer pulley system of the present invention; Figure 10 This is an exploded view of an embodiment of the A-type multi-layer pulley block of the present invention; Figure 11 This is an exploded view of an embodiment of the type B double-layer pulley block of the present invention; Figure 12 This is an exploded view of an embodiment of the type B multi-layer pulley block of the present invention. Detailed Implementation

[0022] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to provide a clearer understanding of the invention's purpose, features, and advantages. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but are merely illustrative of the essential spirit of the invention's technical solution.

[0023] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] The present invention first proposes two substrates with different double-sided groove shapes, namely the first substrate 9 and the second substrate 10.

[0025] See Figure 1-2 As shown, the grooves on the left side of the first substrate 9, from top to bottom, are: the first half-side sliding groove 901 of the vertical hook of the upper pulley group, the first half-side groove 902 of the upper pulley line of the upper pulley group, the first half-side sliding groove 903 of the pulley of the upper pulley group, and the first half-side groove 904 of the lower pulley line of the upper pulley group; the grooves on the right side of the first substrate 9, from top to bottom, are: the first half-side sliding groove 905 of the vertical hook of the lower pulley group, the first half-side groove 906 of the upper pulley line of the lower pulley group, the first half-side sliding groove 907 of the pulley of the lower pulley group, and the first half-side groove 908 of the lower pulley line of the lower pulley group.

[0026] See Figure 3-4 As shown, the grooves on the right side of the second substrate 10, from top to bottom, are: the second half of the vertical hook groove 1001 of the upper pulley group, the second half of the upper pulley line groove 1002 of the upper pulley group, the second half of the pulley groove 1003 of the upper pulley group, and the second half of the lower pulley line groove 1004 of the upper pulley group; the grooves on the left side of the second substrate 10, from top to bottom, are: the second half of the vertical hook groove 1005 of the lower pulley group, the second half of the upper pulley line groove 1006 of the lower pulley group, the second half of the pulley groove 1007 of the lower pulley group, and the second half of the lower pulley line groove 1008 of the lower pulley group.

[0027] Preferably, the first substrate 9 and the second substrate 10 are both plastic parts that are injection molded in one step. The first substrate 9 and the second substrate 10 are respectively provided with buckles on their left and right sides. The first substrate 9 and the second substrate 10 achieve the correct splicing of the groove surface through their respective buckles.

[0028] Preferably, the lower side end face of the first substrate 9 and the lower side end face of the second substrate 10 are respectively provided with positioning notches 13 for judging whether the two are correctly assembled. When the first substrate 9 and the second substrate 10 are assembled with the correct side groove shape facing each other, the positioning notch 13 on the first substrate 9 and the positioning notch 13 on the second substrate 10 fit together from left to right.

[0029] Based on the first substrate 9 and the second substrate 10 provided above, by assembling the two in different orders, the present invention provides the following two embodiments of double-layer pulley block groove plates.

[0030] Example 1: Type A Double-Layer Groove Plate See Figure 5 As shown, one first substrate 9 and two second substrates 10 are selected, and the three are assembled from left to right in the order of second substrate 10, first substrate 9, and second substrate 10.

[0031] When the right side of the second substrate 10 is joined to the left side of the first substrate 9, the second half of the vertical hook sliding groove 1001 of the upper pulley group and the first half of the vertical hook sliding groove 901 of the upper pulley group are joined to form the vertical hook sliding groove section of the upper pulley group. The second half of the upper pulley line groove 1002 of the upper pulley group and the first half of the upper pulley line groove 902 of the upper pulley group are joined to form the upper pulley line groove section of the upper pulley group. The second half of the pulley sliding groove 1003 of the upper pulley group and the first half of the pulley sliding groove 903 of the upper pulley group are joined to form the pulley sliding groove section of the upper pulley group. The second half of the lower pulley line groove 1004 of the upper pulley group and the first half of the lower pulley line groove 904 of the upper pulley group are joined to form the lower pulley line groove section of the upper pulley group.

[0032] The four functional sections—the upper pulley block vertical hook groove section, the upper pulley block upper pulley line groove section, the upper pulley block pulley groove section, and the upper pulley block lower pulley line groove section—constitute the upper pulley assembly functional layer located in the left half of the A-type double-layer groove plate.

[0033] When the right side of the first substrate 9 and the left side of the second substrate 10 are joined together, the first half of the sliding groove 905 of the vertical hook of the lower slide wheel assembly and the second half of the sliding groove 1005 of the vertical hook of the lower slide wheel assembly are joined together to form the sliding groove section of the vertical hook of the lower slide wheel assembly. The first half of the sliding groove 906 of the upper pulley line of the lower slide wheel assembly and the second half of the sliding groove 1006 of the upper pulley line of the lower slide wheel assembly are joined together to form the sliding groove section of the upper pulley line of the lower slide wheel assembly. The first half of the sliding groove 907 of the lower slide wheel assembly and the second half of the sliding groove 1007 of the lower slide wheel assembly are joined together to form the sliding groove section of the lower slide wheel assembly. The first half of the sliding groove 908 of the lower slide wheel line of the lower slide wheel assembly and the second half of the sliding groove 1008 of the lower slide wheel line of the lower slide wheel assembly are joined together to form the sliding groove section of the lower slide wheel line of the lower slide wheel assembly.

[0034] The four functional segments formed by combining the right side groove of the first substrate 9 and the left side groove of the second substrate 10—the vertical hook groove segment of the lower slide wheel assembly, the upper pulley groove segment of the lower slide wheel assembly, the pulley groove segment of the lower slide wheel assembly, and the lower wheel groove segment of the lower slide wheel assembly—constitute the functional layer of the lower slide wheel assembly located in the right half of the A-type groove plate section.

[0035] In the type A double-layer grooved plate, the functional layers of the upper pulley assembly and the lower pulley assembly overlap horizontally, and the vertical hook groove section of the upper pulley group corresponds to the vertical hook groove section of the lower pulley group in terms of left and right positions and has the same thickness. The pulley groove of the upper pulley group (actually a combination of the upper pulley line groove section and the upper pulley groove section) corresponds to the upper pulley line groove section of the lower pulley group in terms of left and right positions. The thickest pulley group support section of the upper pulley groove section is located at the center of the grooved plate, while the upper pulley line groove section of the lower pulley group is located on both sides of the grooved plate, without spatial conflict. The upper pulley block and the lower pulley groove section are nested together. The upper pulley block and the lower pulley groove section are positioned to correspond to each other on the left and right sides (actually, they are a combination of the lower pulley groove section and the lower pulley line groove section). The upper pulley block and the lower pulley line groove section are located on both sides of the groove plate, and do not conflict with the pulley block support section of the lower pulley groove section located at the center of the groove plate. The upper pulley groove section and the lower pulley groove section have the same thickness and are stacked in a staggered manner on the left and right sides, providing space for the subsequent staggered installation of the upper and lower pulley blocks.

[0036] Preferably, in the type A double-layer slot plate, the first substrate 9 located in the middle is used as the central substrate. At this time, the top of the first substrate 9 is provided with two sets of electromagnets and armature hook mounting positions stacked vertically, and the tops of the two second substrates 10 located on both sides are respectively provided with heat sinks corresponding to the positions of their respective electromagnets.

[0037] Therefore, each type A double-layer slot plate can accommodate two sets of pulley assemblies, two sets of electromagnets and armature hooks, thus corresponding to two needle selection units respectively.

[0038] Example 2: Type B double-layer grooved plate See Figure 6 As shown, two first substrates 9 and one second substrate 10 are selected and assembled from left to right in the order of first substrate 9, second substrate 10, and first substrate 9.

[0039] When the right side of the first substrate 9 and the left side of the second substrate 10 are joined together, the first half of the sliding groove 905 of the vertical hook of the lower slide wheel assembly and the second half of the sliding groove 1005 of the vertical hook of the lower slide wheel assembly are joined together to form the sliding groove section of the vertical hook of the lower slide wheel assembly. The first half of the sliding groove 906 of the upper pulley line of the lower slide wheel assembly and the second half of the sliding groove 1006 of the upper pulley line of the lower slide wheel assembly are joined together to form the sliding groove section of the upper pulley line of the lower slide wheel assembly. The first half of the sliding groove 907 of the lower slide wheel assembly and the second half of the sliding groove 1007 of the lower slide wheel assembly are joined together to form the sliding groove section of the lower slide wheel assembly. The first half of the sliding groove 908 of the lower slide wheel line of the lower slide wheel assembly and the second half of the sliding groove 1008 of the lower slide wheel line of the lower slide wheel assembly are joined together to form the sliding groove section of the lower slide wheel line of the lower slide wheel assembly.

[0040] The four functional segments formed by combining the right side groove of the first substrate 9 and the left side groove of the second substrate 10—the vertical hook groove segment of the lower slide wheel assembly, the upper pulley groove segment of the lower slide wheel assembly, the pulley groove segment of the lower slide wheel assembly, and the lower wheel groove segment of the lower slide wheel assembly—constitute the functional layer of the lower slide wheel assembly located in the right half of the A-type groove plate section.

[0041] When the right side of the second substrate 10 is joined to the left side of the first substrate 9, the second half of the vertical hook sliding groove 1001 of the upper pulley group and the first half of the vertical hook sliding groove 901 of the upper pulley group are joined to form the vertical hook sliding groove section of the upper pulley group. The second half of the upper pulley line groove 1002 of the upper pulley group and the first half of the upper pulley line groove 902 of the upper pulley group are joined to form the upper pulley line groove section of the upper pulley group. The second half of the pulley sliding groove 1003 of the upper pulley group and the first half of the pulley sliding groove 903 of the upper pulley group are joined to form the pulley sliding groove section of the upper pulley group. The second half of the lower pulley line groove 1004 of the upper pulley group and the first half of the lower pulley line groove 904 of the upper pulley group are joined to form the lower pulley line groove section of the upper pulley group.

[0042] The four functional sections—the upper pulley assembly vertical hook groove section, the upper pulley line groove section, the upper pulley pulley groove section, and the upper pulley assembly lower pulley line groove section—constitute the upper pulley assembly functional layer located in the left half of the B-type double-layer groove plate.

[0043] In the type B double-layer grooved plate, the functional layers of the lower pulley assembly and the upper pulley assembly overlap horizontally, and the vertical hook groove section of the lower pulley group corresponds to the vertical hook groove section of the upper pulley group in terms of left and right positions and has the same thickness. The upper pulley groove section of the lower pulley group corresponds to the pulley groove section of the upper pulley group (actually a combination of the upper pulley groove section and the upper pulley groove section), and the thickest pulley support section of the upper pulley group is located at the center of the grooved plate, while the upper pulley groove section of the lower pulley group is located on both sides of the grooved plate, without spatial conflict. The design employs a nested configuration. The lower pulley groove section (actually a combination of the lower pulley groove section and the lower pulley line groove section) corresponds to the left and right positions of the upper pulley groove section. The upper pulley groove section is located on both sides of the groove plate, without interfering with the pulley support section of the lower pulley groove section located at the center of the groove plate. The lower pulley groove section and the upper pulley groove section have the same thickness and are stacked in a staggered manner on the left and right sides, providing space for the subsequent staggered installation of the lower and upper pulley groups.

[0044] Preferably, in the type B double-layer slotted plate, the second substrate 10 located in the middle serves as the central plate. At this time, the top of the second substrate 10 is provided with two sets of electromagnets and armature hook mounting positions stacked vertically, and the tops of the two first substrates 9 located on both sides are respectively provided with heat sinks corresponding to the positions of their respective electromagnets.

[0045] Therefore, each type B double-layer slot plate can accommodate two sets of pulley assemblies, two sets of electromagnets and armature hooks, so that they can correspond to two needle selection units respectively.

[0046] Based on the above-mentioned Type B double-layer slot plate and Type B double-layer slot plate, the present invention provides the following two embodiments of multi-layer slot plate assemblies.

[0047] Example 3: Type A Multilayer Slotted Plate Assembly See Figure 7 As shown, based on the arrangement and assembly method of Embodiment 1, a type A single-layer slot plate section can first be formed by assembling a second substrate 10 and a first substrate 9 from left to right. Then, multiple type A single-layer slot plate sections are stacked sequentially from left to right. Finally, a second substrate 10 is assembled on the rightmost side of the above assembly, thereby forming a set of type A multi-layer slot plate components.

[0048] In this way, each of the A-type single-layer slotted plate sections can accommodate a set of upper pulley assemblies within its slot, and each corresponds to a needle selection unit; at the same time, the slots formed between two adjacent A-type single-layer slotted plate sections can also accommodate a set of lower pulley assemblies, and each corresponds to a needle selection unit.

[0049] That is, a set of upper pulley assemblies can be accommodated between the right side of each second substrate 10 and the left side of the opposite first substrate 9, and a set of lower pulley assemblies can be accommodated between the right side of each first substrate 9 and the left side of the opposite second substrate 10, so that a set of A-type multilayer slot plate assemblies can correspond to multiple needle selection units to meet the needs of the needle selector assembly.

[0050] For example, by correctly assembling nine second substrates 10 and eight first substrates 9 from left to right at intervals, a type A 16-layer slot plate assembly can be formed. This type A 16-layer slot plate assembly can accommodate eight sets of upper pulley assemblies and eight sets of lower pulley assemblies stacked alternately from left to right, thus satisfying the needle selector assembly for 16 needle selection units.

[0051] Preferably, the upper, middle and lower parts of the first substrate 9 and the second substrate 10 are respectively provided with fixing sections, and each fixing section is provided with a through hole 14. After all the second substrates 10 and the first substrates 9 are alternately stacked and spliced, the fasteners are used to cooperate with the through holes 14 to achieve further fixation.

[0052] Example 4: Type B Multilayer Slotted Plate Assembly See Figure 8 As shown, based on the arrangement and assembly method of Embodiment 2, a B-type single-layer slot plate section can first be formed by assembling a first substrate 9 and a second substrate 10. Then, multiple B-type single-layer slot plate sections are stacked sequentially from left to right. Finally, a first substrate 9 is assembled on the rightmost side of the above assembly, thereby forming a set of B-type multi-layer slot plate components.

[0053] In this way, each of the B-type single-layer grooved plate sections can accommodate a set of lower pulley assemblies within its groove, and each corresponds to a needle selection unit; at the same time, the groove formed between two adjacent B-type single-layer grooved plate sections can also accommodate a set of upper pulley assemblies, and each corresponds to a needle selection unit.

[0054] That is, a set of pulley assemblies can be accommodated between the right side of each first substrate 9 and the left side of the opposite second substrate 10, and a set of upper pulley assemblies can be accommodated between the right side of each second substrate 10 and the left side of the opposite first substrate 9, so that a set of B-type multilayer slot plate assemblies can correspond to multiple needle selection units to meet the needs of the needle selector assembly.

[0055] For example, by correctly assembling eight second substrates 10 and eight first substrates 9 from left to right at intervals, a type B 15-layer slot plate assembly can be formed. This type B 15-layer slot plate assembly can accommodate eight sets of lower pulley assemblies and seven sets of upper pulley assemblies stacked alternately from left to right, thus satisfying the needs of a needle selector assembly for 15 needle selection units.

[0056] Preferably, the upper, middle and lower parts of the first substrate 9 and the second substrate 10 are respectively provided with fixing sections, and each fixing section is provided with a through hole 14. After m+1 first substrates 9 and m second substrates 10 are alternately stacked and spliced, the fasteners are used to cooperate with the through holes 14 to achieve further fixation.

[0057] A typical needle selector assembly contains eight needle selection units. Each needle selection unit includes one electromagnet (containing an iron core, coil, frame, and two coil lead contacts), two armature hooks, two springs, two rotating shafts, and one set of pulleys. Because existing slots can only accommodate one needle selection unit, the two sides of the slots are identical, making the design and fabrication relatively simple.

[0058] In order to accommodate two needle selection units in a single slot plate without increasing the width and thickness of the slot plate, this invention requires the design of two substrates with different double-sided slot shapes. This enables the realization of a double-layer structure within the slot plate, allowing the combination of two needle selection units to occupy the same width (35mm) and thickness (5mm) as the original needle selection unit.

[0059] Since this invention can accommodate two needle selection units in one slot, for ease of description, this invention artificially defines a double-layer pulley system slot as a slot section, and multiple stacked slot sections as slot assemblies. Correspondingly, this invention artificially defines two needle selection units housed in the same slot section as a needle selector assembly section, and multiple stacked needle selector assembly sections as needle selector assemblies.

[0060] The pulley assembly in the needle selection unit mainly includes a pulley block, an upper pulley line (including a vertical hook), and a lower pulley line (including a fixed end block and a quick connector). Based on the four embodiments mentioned above, the present invention also provides the following two embodiments of a double-layer pulley block.

[0061] Example 5: Type A Double-Layer Pulley Block See Figure 9 As shown, based on Embodiment 1, it further includes a set of upper pulley assemblies and a set of lower pulley assemblies. The upper pulley assemblies and lower pulley assemblies are arranged alternately from left to right in the A-type double-layer groove plate of Embodiment 1, thereby forming a single A-type double-layer pulley group.

[0062] The upper pulley assembly includes an upper pulley vertical hook pair 1, an upper pulley line 5, an upper pulley group 3, an upper pulley lower pulley line 6, and an upper pulley group head line connector 11.

[0063] The lower pulley assembly includes a lower pulley vertical hook pair 2, a lower pulley group 7, an upper pulley line of the lower pulley group 4, a lower pulley line of the lower pulley group 8, and a lower pulley group head line connector 12.

[0064] The upper pulley block vertical hook pair 1 and the lower pulley block vertical hook pair 2 are respectively movably installed in the upper pulley block vertical hook groove section and the lower pulley block vertical hook groove section; the upper pulley block 3 and the lower pulley block 7 are respectively movably installed in the upper pulley block pulley groove section and the lower pulley block pulley groove section; the upper pulley block 3 and the lower pulley block 7 are stacked in a staggered manner within the double-layer pulley block groove plate.

[0065] The two ends of the upper pulley line 5 of the upper pulley group pass over the lower edge of the upper pulley of the upper pulley group 3 and then go upward through the groove section of the upper pulley line of the upper pulley group to connect with the two vertical hooks of the vertical hook pair 1 of the upper pulley group respectively; the two ends of the lower pulley line 6 of the upper pulley group pass over the upper edge of the lower pulley of the upper pulley group 3 and then go downward through the groove section of the lower pulley line of the upper pulley group respectively; the first line connector 11 of the upper pulley group is connected to one of the downward-going ends of the lower pulley line 6 of the upper pulley group.

[0066] The two ends of the upper pulley line 4 of the lower pulley group pass over the lower edge of the upper pulley of the lower pulley group 7 and then go upward through the groove section of the upper pulley line of the lower pulley group to connect with the two vertical hooks of the vertical hook pair 2 of the lower pulley group respectively; the two ends of the lower pulley line 8 of the lower pulley group pass over the upper edge of the lower pulley of the lower pulley group 7 and then go downward through the groove section of the lower pulley line of the lower pulley group respectively; the first line connector 12 of the lower pulley group is connected to one of the downward-going ends of the lower pulley line 8 of the lower pulley group.

[0067] Example 6: Type A Multi-layer Pulley Block See Figure 10 As shown, based on Embodiment 3, it also includes multiple sets of upper pulley assemblies and multiple sets of lower pulley assemblies. The upper pulley assemblies and lower pulley assemblies are arranged alternately from left to right in the A-type multi-layer groove plate of Embodiment 3, thereby forming an A-type multi-layer pulley group.

[0068] The upper pulley assembly includes an upper pulley vertical hook pair 1, an upper pulley line 5, an upper pulley group 3, an upper pulley lower pulley line 6, and an upper pulley group head line connector 11.

[0069] The lower pulley assembly includes a lower pulley vertical hook pair 2, a lower pulley group 7, an upper pulley line of the lower pulley group 4, a lower pulley line of the lower pulley group 8, and a lower pulley group head line connector 12.

[0070] The upper pulley block vertical hook pair 1 and the lower pulley block vertical hook pair 2 are respectively movably installed in the upper pulley block vertical hook groove section and the lower pulley block vertical hook groove section; the upper pulley block 3 and the lower pulley block 7 are respectively movably installed in the upper pulley block pulley groove section and the lower pulley block pulley groove section; the upper pulley block 3 and the lower pulley block 7 are stacked in a staggered manner within the double-layer pulley block groove plate.

[0071] The two ends of the upper pulley line 5 of the upper pulley group pass over the lower edge of the upper pulley of the upper pulley group 3 and then go upward through the groove section of the upper pulley line of the upper pulley group to connect with the two vertical hooks of the vertical hook pair 1 of the upper pulley group respectively; the two ends of the lower pulley line 6 of the upper pulley group pass over the upper edge of the lower pulley of the upper pulley group 3 and then go downward through the groove section of the lower pulley line of the upper pulley group respectively; the first line connector 11 of the upper pulley group is connected to one of the downward-going ends of the lower pulley line 6 of the upper pulley group.

[0072] The two ends of the upper pulley line 4 of the lower pulley group pass over the lower edge of the upper pulley of the lower pulley group 7 and then go upward through the groove section of the upper pulley line of the lower pulley group to connect with the two vertical hooks of the vertical hook pair 2 of the lower pulley group respectively; the two ends of the lower pulley line 8 of the lower pulley group pass over the upper edge of the lower pulley of the lower pulley group 7 and then go downward through the groove section of the lower pulley line of the lower pulley group respectively; the first line connector 12 of the lower pulley group is connected to one of the downward-going ends of the lower pulley line 8 of the lower pulley group.

[0073] Example 7: Type B Double-Layer Pulley Block See Figure 11 As shown, based on Embodiment 2, it further includes a set of lower pulley assemblies and a set of upper pulley assemblies. The lower pulley assemblies and upper pulley assemblies are arranged alternately from left to right in the Type B double-layer groove plate of Embodiment 2, thereby forming a single Type B double-layer pulley group.

[0074] The lower pulley assembly includes a lower pulley vertical hook pair 2, a lower pulley group 7, an upper pulley line of the lower pulley group 4, a lower pulley line of the lower pulley group 8, and a lower pulley group head line connector 12.

[0075] The upper pulley assembly includes an upper pulley vertical hook pair 1, an upper pulley line 5, an upper pulley group 3, an upper pulley lower pulley line 6, and an upper pulley group head line connector 11.

[0076] The upper pulley block vertical hook pair 1 and the lower pulley block vertical hook pair 2 are respectively movably installed in the upper pulley block vertical hook groove section and the lower pulley block vertical hook groove section; the upper pulley block 3 and the lower pulley block 7 are respectively movably installed in the upper pulley block pulley groove section and the lower pulley block pulley groove section; the upper pulley block 3 and the lower pulley block 7 are stacked in a staggered manner within the double-layer pulley block groove plate.

[0077] The two ends of the upper pulley line 5 of the upper pulley group pass over the lower edge of the upper pulley of the upper pulley group 3 and then go upward through the groove section of the upper pulley line of the upper pulley group to connect with the two vertical hooks of the vertical hook pair 1 of the upper pulley group respectively; the two ends of the lower pulley line 6 of the upper pulley group pass over the upper edge of the lower pulley of the upper pulley group 3 and then go downward through the groove section of the lower pulley line of the upper pulley group respectively; the first line connector 11 of the upper pulley group is connected to one of the downward-going ends of the lower pulley line 6 of the upper pulley group.

[0078] The two ends of the upper pulley line 4 of the lower pulley group pass over the lower edge of the upper pulley of the lower pulley group 7 and then go upward through the groove section of the upper pulley line of the lower pulley group to connect with the two vertical hooks of the vertical hook pair 2 of the lower pulley group respectively; the two ends of the lower pulley line 8 of the lower pulley group pass over the upper edge of the lower pulley of the lower pulley group 7 and then go downward through the groove section of the lower pulley line of the lower pulley group respectively; the first line connector 12 of the lower pulley group is connected to one of the downward-going ends of the lower pulley line 8 of the lower pulley group.

[0079] Example 8: Type B Multi-layer Pulley Block See Figure 12 As shown, based on Embodiment 4, it also includes multiple sets of lower pulley assemblies and multiple sets of upper pulley assemblies. The lower pulley assemblies and upper pulley assemblies are arranged alternately from left to right in the type B multi-layer groove plate of Embodiment 4, thereby forming a type B multi-layer pulley group.

[0080] The lower pulley assembly includes a lower pulley vertical hook pair 2, a lower pulley group 7, an upper pulley line of the lower pulley group 4, a lower pulley line of the lower pulley group 8, and a lower pulley group head line connector 12.

[0081] The upper pulley assembly includes an upper pulley vertical hook pair 1, an upper pulley line 5, an upper pulley group 3, an upper pulley lower pulley line 6, and an upper pulley group head line connector 11.

[0082] The upper pulley block vertical hook pair 1 and the lower pulley block vertical hook pair 2 are respectively movably installed in the upper pulley block vertical hook groove section and the lower pulley block vertical hook groove section; the upper pulley block 3 and the lower pulley block 7 are respectively movably installed in the upper pulley block pulley groove section and the lower pulley block pulley groove section; the upper pulley block 3 and the lower pulley block 7 are stacked in a staggered manner within the double-layer pulley block groove plate.

[0083] The two ends of the upper pulley line 5 of the upper pulley group pass over the lower edge of the upper pulley of the upper pulley group 3 and then go upward through the groove section of the upper pulley line of the upper pulley group to connect with the two vertical hooks of the vertical hook pair 1 of the upper pulley group respectively; the two ends of the lower pulley line 6 of the upper pulley group pass over the upper edge of the lower pulley of the upper pulley group 3 and then go downward through the groove section of the lower pulley line of the upper pulley group respectively; the first line connector 11 of the upper pulley group is connected to one of the downward-going ends of the lower pulley line 6 of the upper pulley group.

[0084] The two ends of the upper pulley line 4 of the lower pulley group pass over the lower edge of the upper pulley of the lower pulley group 7 and then go upward through the groove section of the upper pulley line of the lower pulley group to connect with the two vertical hooks of the vertical hook pair 2 of the lower pulley group respectively; the two ends of the lower pulley line 8 of the lower pulley group pass over the upper edge of the lower pulley of the lower pulley group 7 and then go downward through the groove section of the lower pulley line of the lower pulley group respectively; the first line connector 12 of the lower pulley group is connected to one of the downward-going ends of the lower pulley line 8 of the lower pulley group.

[0085] Pulley system: This refers to a movable pulley system, consisting of upper and lower pulleys. Fixed pulleys can change the direction of force, while movable pulleys serve two purposes: saving effort and shortening the stroke. In the needle selection unit, the pulley system primarily shortens the stroke; that is, the pulley system's stroke is half the needle lifting stroke. Essentially, the upper pulley "stores" half the needle lifting stroke, which is then released through the lower pulley. Three-position / multi-position systems utilize this principle. The upper pulley lines are connected in parallel, while the lower pulley lines are connected in series. The lower pulley lines can release the stroke "stored" by multiple upper pulleys.

[0086] Pulley line: The line acting on the pulley. There are two pulley lines: 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. Typically, in a movable pulley system, the upper pulley line is the driving side, and the lower pulley line is the output side, connecting to the load. In this invention, the vertical hook connected to the end of the upper pulley line is driven by the lifting knife. One end of the lower pulley line is fixed, and the other end is the "head line," connecting the warp yarn and heddle yarn, controlling the up-and-down movement of the warp yarn, and is the load.

[0087] Pulley blocks can be equipped with either ball bearings or sliding bearings. In current pulley block structures, ball bearings offer significantly better load-bearing capacity than sliding bearings. However, ball bearings are limited by the size of the balls and bearing supports, making it difficult to reduce their thickness. Furthermore, the pulley groove itself is thin, and its space occupied by the groove is also limited. This invention addresses this by symmetrically arranging thicker pulley components with thinner pulley grooves, and by stacking the two thicker pulley components vertically in a staggered manner. This achieves a high-density arrangement of thicker ball bearing pulley blocks, making this solution well-suited for high-speed, high-load applications. Example

[0088] Based on Embodiments 5 and 6, the present invention also provides a needle selector assembly, which is a double-acting needle selector assembly and is equipped with the double-layer pulley group disclosed above. Example

[0089] Based on Embodiment 7, the present invention also provides a jacquard machine equipped with the needle selector assembly disclosed above.

[0090] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A double-layer pulley block groove plate, characterized in that: Including a second substrate (10), a first substrate (9), and a second substrate (10) assembled from left to right, or a first substrate (9), a second substrate (10), and a first substrate (9) assembled from left to right; The right side groove of the second substrate (10) and the left side groove of the first substrate (9) are combined to form the upper pulley assembly functional layer. The upper pulley assembly functional layer is divided into four functional segments from top to bottom: the upper pulley assembly vertical hook groove segment, the upper pulley assembly upper pulley line groove segment, the upper pulley assembly pulley groove segment, and the upper pulley assembly lower pulley line groove segment. The right side groove of the first substrate (9) and the left side groove of the second substrate (10) are combined to form the sliding wheel assembly functional layer. The sliding wheel assembly functional layer is divided into four functional segments from top to bottom: the vertical hook groove segment of the sliding wheel assembly, the upper pulley line groove segment of the sliding wheel assembly, the pulley groove segment of the sliding wheel assembly, and the lower pulley line groove segment of the sliding wheel assembly. The upper pulley assembly functional layer and the lower pulley assembly functional layer are arranged to overlap left and right with respect to the first substrate (9) or the second substrate (10), and the vertical hook groove section of the upper pulley group corresponds to the vertical hook groove section of the lower pulley group in left and right positions and has the same thickness; the pulley groove section of the upper pulley group corresponds to the upper pulley groove section of the lower pulley group in left and right positions, and the thickest pulley group support section of the pulley groove section of the upper pulley group is located at the center of the groove plate, while the upper pulley of the lower pulley group... The wheel groove segment is located on both sides of the groove plate and does not conflict spatially; the lower wheel groove segment of the upper pulley group corresponds to the left and right positions of the lower pulley groove segment of the lower pulley group, and the lower wheel groove segment of the upper pulley group is located on both sides of the groove plate and does not conflict with the pulley group support segment of the lower pulley groove segment located at the center of the groove plate; the upper pulley groove segment and the lower pulley groove segment of the lower pulley group have the same thickness and are designed to be stacked vertically and vertically staggered on the left and right sides.

2. The double-layer pulley block groove plate according to claim 1, characterized in that: The first substrate (9) and the second substrate (10) are both plastic parts formed by injection molding in one step. The first substrate (9) and the second substrate (10) are respectively provided with buckles on the left and right sides. The right side of the second substrate (10) and the left side of the first substrate (9) are superimposed and spliced ​​through the corresponding buckles. The right side of the first substrate (9) and the left side of the second substrate (10) are superimposed and spliced ​​through the corresponding buckles.

3. The double-layer pulley block groove plate according to claim 1, characterized in that: When the second substrate (10), the first substrate (9), and the second substrate (10) are combined, the first substrate (9) in the middle is used as the center piece. At this time, the top of the first substrate (9) is provided with two sets of electromagnets and armature hook mounting positions stacked on top of each other, and the tops of the two second substrates (10) on both sides are respectively provided with heat sinks corresponding to the positions of their respective electromagnets. When the first substrate (9), the second substrate (10), and the first substrate (9) are combined, the second substrate (10) in the middle is used as the center piece. At this time, the top of the second substrate (10) is provided with two sets of electromagnets and armature hook mounting positions stacked on top of each other, and the tops of the two first substrates (9) on both sides are respectively provided with heat sinks corresponding to the positions of their respective electromagnets.

4. The double-layer pulley block groove plate according to claim 1, characterized in that: The grooves on the left side of the first substrate (9) from top to bottom are: the first half of the vertical hook groove of the upper pulley group (901), the first half of the upper pulley line groove of the upper pulley group (902), the first half of the pulley groove of the upper pulley group (903), and the first half of the lower pulley line groove of the upper pulley group (904); the grooves on the right side of the second substrate (10) from top to bottom are: the second half of the vertical hook groove of the upper pulley group (1001), the second half of the upper pulley line groove of the upper pulley group (1002), the second half of the pulley groove of the upper pulley group (1003), and the second half of the lower pulley line groove of the upper pulley group (1004). When the right side of the second substrate (10) and the left side of the first substrate (9) are joined together, the second half of the vertical hook sliding groove (1001) of the upper pulley group and the first half of the vertical hook sliding groove (901) of the upper pulley group are joined together to form the vertical hook sliding groove section of the upper pulley group. The second half of the upper pulley line groove (1002) of the upper pulley group and the first half of the upper pulley line groove (902) of the upper pulley group are joined together to form the upper pulley line groove section of the upper pulley group. The second half of the pulley sliding groove (1003) of the upper pulley group and the first half of the pulley sliding groove (903) of the upper pulley group are joined together to form the pulley sliding groove section of the upper pulley group. The second half of the lower pulley line groove (1004) of the upper pulley group and the first half of the lower pulley line groove (904) of the upper pulley group are joined together to form the lower pulley line groove section of the upper pulley group. The grooves on the right side of the first substrate (9) from top to bottom are: the first half of the vertical hook groove of the lower slide wheel assembly (905), the first half of the upper pulley line groove of the lower slide wheel assembly (906), the first half of the pulley groove of the lower slide wheel assembly (907), and the first half of the lower slide wheel line groove of the lower slide wheel assembly (908); the grooves on the left side of the second substrate (10) from top to bottom are: the second half of the vertical hook groove of the lower slide wheel assembly (1005), the second half of the upper pulley line groove of the lower slide wheel assembly (1006), the second half of the pulley groove of the lower slide wheel assembly (1007), and the second half of the lower slide wheel line groove of the lower slide wheel assembly (1008). When the right side of the first substrate (9) and the left side of the second substrate (10) are joined together, the first half of the sliding groove (905) of the vertical hook of the lower wheel assembly and the second half of the sliding groove (1005) of the vertical hook of the lower wheel assembly are joined together to form the sliding groove section of the vertical hook of the lower wheel assembly. The first half of the sliding groove (906) of the upper pulley line of the lower wheel assembly and the second half of the sliding groove (1006) of the upper pulley line of the lower wheel assembly are joined together to form the sliding groove section of the upper pulley line of the lower wheel assembly. The first half of the sliding groove (907) of the lower wheel assembly and the second half of the sliding groove (1007) of the lower wheel assembly are joined together to form the sliding groove section of the lower wheel assembly. The first half of the sliding groove (908) of the lower wheel assembly and the second half of the sliding groove (1008) of the lower wheel assembly are joined together to form the sliding groove section of the lower wheel assembly.

5. The double-layer pulley block groove plate according to claim 4, characterized in that: The lower side end face of the first substrate (9) and the lower side end face of the second substrate (10) are respectively provided with positioning notches (13) for judging whether the two are correctly assembled. When the first substrate (9) and the second substrate (10) are assembled with the correct side groove shape facing each other, the positioning notch (13) on the first substrate (9) and the positioning notch (13) on the second substrate (10) fit together left and right.

6. The double-layer pulley block groove plate according to claim 1, characterized in that: A type A single-layer groove plate section is formed by assembling the second substrate (10) and the first substrate (9) from left to right; each type A single-layer groove plate section can accommodate a set of upper pulley assemblies in the groove and corresponds to a needle selection unit; Multiple identical A-type single-layer slot plate sections are stacked sequentially from left to right and then a second substrate (10) is spliced ​​together on the far right to form a set of A-type multi-layer slot plate assemblies. The slot between two adjacent A-type single-layer slot plate sections can accommodate a set of pulley assemblies and each corresponds to a needle selection unit. This allows a set of type A multi-layer slot plate assemblies to correspond to multiple needle selection units, thereby meeting the requirements of the needle selector assembly; Alternatively, the first substrate (9) and the second substrate (10) can be assembled from left to right to form a type B single-layer groove plate section; each type B single-layer groove plate section can accommodate a set of pulley assemblies and corresponds to a needle selection unit; Multiple identical type B single-layer slotted plate sections are stacked sequentially from left to right and then a first substrate (9) is spliced ​​together on the far right to form a type B multi-layer slotted plate assembly. The slots formed between two adjacent type B single-layer slotted plate sections can accommodate a set of upper pulley assemblies and each corresponds to a needle selection unit. This allows a set of type B multi-layer slot plate assemblies to correspond to multiple needle selection units, thereby meeting the needs of the needle selector assembly.

7. The double-layer pulley block groove plate according to claim 6, characterized in that: The first substrate (9) and the second substrate (10) are respectively provided with fixing sections in the upper, middle and lower parts. Each fixing section is provided with a through hole (14). Multiple A-type single-layer groove plate sections or multiple B-type single-layer groove plate sections are stacked and fixed by fasteners cooperating with the through holes (14).

8. A double-layer pulley system, characterized in that: It includes a double-layer pulley block groove plate as described in any one of claims 1-7, as well as an upper pulley assembly and a lower pulley assembly; The upper pulley assembly includes an upper pulley vertical hook pair (1), an upper pulley line (5), an upper pulley group (3), an upper pulley lower pulley line (6), and an upper pulley group head line connector (11). The lower pulley assembly includes a lower pulley vertical hook pair (2), a lower pulley assembly (7), an upper pulley line of the lower pulley assembly (4), a lower pulley line of the lower pulley assembly (8), and a lower pulley assembly head line connector (12). The upper pulley group vertical hook pair (1) and the lower pulley group vertical hook pair (2) are respectively movably arranged in the upper pulley group vertical hook groove section and the lower pulley group vertical hook groove section; the upper pulley group (3) and the lower pulley group (7) are respectively movably arranged in the upper pulley group pulley groove section and the lower pulley group pulley groove section; the upper pulley group (3) and the lower pulley group (7) are stacked in a staggered manner in the double-layer pulley group groove plate; The two ends of the upper pulley line (5) of the upper pulley group pass over the lower edge of the upper pulley of the upper pulley group (3) and then go upward through the groove section of the upper pulley line of the upper pulley group to connect with the two vertical hooks of the vertical hook pair (1) of the upper pulley group respectively; the two ends of the lower pulley line (6) of the upper pulley group pass over the upper edge of the lower pulley of the upper pulley group (3) and then go downward through the groove section of the lower pulley line of the upper pulley group respectively; the first line connector (11) of the upper pulley group is connected to one of the downward-going ends of the lower pulley line (6) of the upper pulley group; The two ends of the upper pulley line (4) of the lower pulley group pass over the lower edge of the upper pulley of the lower pulley group (7) and then go upward through the groove section of the upper pulley line of the lower pulley group to connect with the two vertical hooks of the vertical hook pair (2) of the lower pulley group respectively; the two ends of the lower pulley line (8) of the lower pulley group pass over the upper edge of the lower pulley of the lower pulley group (7) and then go downward through the groove section of the lower pulley line of the lower pulley group respectively; the first line connector (12) of the lower pulley group is connected to one of the downward-going ends of the lower pulley line (8) of the lower pulley group.

9. A needle selector assembly, characterized in that: The needle selector assembly is equipped with the double-layer pulley system as described in claim 8.

10. A jacquard machine, characterized in that: The jacquard machine is equipped with the needle selector assembly as described in claim 9.

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