Needle pressing strip on flat knitting machine and assembly structure of needle pressing strip
By designing the needle bar and its assembly structure on the transverse knitting machine, the knitting needle shake problem caused by insufficient pressure needle gap in the prior art is solved, and a more stable knitting needle operation and higher knitting accuracy are achieved.
Patent Information
- Application Number
- CN202420821438.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-19
AI Technical Summary
The existing cross-knitting machines lack sufficient needle clearance when knitting, resulting in high shaking when turning the needle, affecting the stability of the flip, especially in thin-pitch horizontal machines.
A needle pressing strip and its assembly structure on a horizontal knitting machine are designed. By setting a needle pressing strip on the needle plate structure, using the needle pressing surface and groove structure, combined with the limiting effect of the dovetail plug strip on the needle plate, the gap between the knitting needle and the needle plate is adjusted, and the swaying of the knitting needle is reduced by inclined needle pressing surface and elastic arms.
It effectively reduces the shaking of the needle turning out the needle, improves the stability and accuracy of the knitting needle, reduces the diversity of the needle plate structural parts, and improves the overall weaving accuracy and quality.
Smart Images
Figure CN222631708U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a needle pressure bar on a flat knitting machine and its assembly structure, and is particularly suitable for the needle plate structure of the flat knitting machine. It has a practical milestone significance for controlling the upper and lower gaps between the needles of the flat knitting machine, and particularly for solving the stability of the flipping needles of a fine-gauge flat knitting machine. Background Art
[0002] When the current flat knitting machine is knitting, there is no sufficient needle pressure gap, and the knitting needle shakes greatly when the needle is turned over and the needle is out, which affects the stability of the turning over.
[0003] High-end flat knitting machines, especially fine-gauge flat knitting machines, knit expensive fabrics. If there is a slight missed stitch in the turning stitch, the grade of the knitted sweater will be reduced. Even if it is repaired manually, in today's labor shortage, the cost of the sweater is increased by money and effort. Under this practical background, it is necessary to improve the accuracy of existing needle plate structural parts. In order to promote the progress of the flat knitting machine industry - especially the stability of fine-gauge flat knitting machines, the needle plate structural parts of flat knitting machines need to be continuously improved and innovated. Summary of the invention
[0004] The purpose of the present invention is to solve the problems existing in the existing disclosed technology, thereby designing a needle pressing bar on a flat knitting machine and its assembly structure.
[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a needle presser bar on a horizontal knitting machine, comprising a needle presser bar arranged in a needle groove formed by two adjacent inserts on a needle plate structure of the horizontal knitting machine, a needle presser surface is arranged at the lower end of the needle presser bar for fitting the upper end surface of the knitting needle, and a groove is provided on the needle presser bar for engaging with a dovetail plug strip of the needle plate to limit the position of the needle presser bar.
[0006] Furthermore, the second extension sections are provided on both sides of the groove of the needle pressing strip, and the height of the second extension sections is flush with the upper end of the inserting piece.
[0007] Furthermore, a first extension section for extending into the notch of the sinker of the flat knitting machine is provided on the front side of the needle pressing bar.
[0008] Furthermore, a Z-shaped structure corresponding to the protrusion of the knitting needle connecting pin is also provided on the rear side of the groove of the needle pressing strip.
[0009] Furthermore, the inner walls on both sides of the groove of the needle pressing strip are dovetail concave surfaces corresponding to the dovetail plug strip of the needle plate.
[0010] Furthermore, an elastic arm is arranged on the pressing needle surface.
[0011] Furthermore, the pressing needle surface is an inclined pressing needle surface which gradually inclines downward from the rear side toward the front side.
[0012] Furthermore, the upper end of the first extension section is an inclined surface inclined forward.
[0013] Furthermore, the second extension section is higher than the first extension section and the Z-shaped structure.
[0014] A needle bar assembly structure on a horizontal knitting machine, a plurality of first insert slots and second insert slots are arranged and configured at equal intervals on a needle plate, the first insert is installed in the first insert slot, the second insert is installed in the second insert slot, and the insert slots of the needle plate are arranged in a 1-by-1 arrangement, the front end of the insert group composed of the first insert and the second insert is limited by an insert positioning steel wire, two adjacent needle slots are formed between each two adjacent first inserts and the second insert, the needle slots include adjacent first needle slots and second needle slots, the first needle slots are arranged in a 1-by-1 arrangement, the front end of the insert group composed of the first insert and the second insert is limited by an insert positioning steel wire, and two adjacent needle slots are formed between each adjacent two first inserts and the second insert, and the needle slots include adjacent first needle slots and second needle slots, and the second needle slots are arranged in a 1-by-1 arrangement. A knitting needle is placed in each of the first needle slot and the second needle slot, and the two knitting needles are mirror images of each other and are arranged in a 1-for-1 configuration; the dividing line between the two knitting needles corresponds to the second plug-in piece, a toothed piece is placed at the upper mouth of the first plug-in piece slot, the first plug-in piece slot and the second plug-in piece slot are assembled and arranged in a 1-for-1 combination, the sinker is installed in the sinker installation notch of the second slot, the needle pressure bar is installed in the needle slot formed by the first plug-in piece and the second plug-in piece, and the needle plate dovetail plug strip passes through the corresponding grooves at the upper ends of the first plug-in piece, the second plug-in piece and the needle pressure bar for limit fixing.
[0015] The advantages are: under the action of the needle plate dovetail plug strip, needle press strips of different matching sizes can be selected according to actual conditions, thereby controlling the first gap between the knitting needle and the needle plate dovetail plug strip to be adjusted to the most reasonable minimum gap, and the needle press surface at the lower end of the needle press strip is lengthened, which can more effectively reduce the shaking of the needle turning and needle output, and the thickness of the needle press strip is set to the same as the needle groove width to ensure the uniformity of the needle groove, while strengthening the stiffness of the connection between the needle plate structural piece and the plug; the inclined needle press surface design can reduce the running damping of the knitting needle, and the elastic arm setting can reduce the diversity of the needle press strip setting. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the first type of needle pressing strip structure.
[0017] Figure 2 Schematic diagram of the second type of needle pressing strip structure.
[0018] Figure 3 This is a schematic diagram of the third type of needle pressing strip structure.
[0019] Figure 4 Schematic diagram of the fourth type of needle pressing strip structure.
[0020] Figure 5 It is a schematic diagram of the fifth type of needle pressing strip structure.
[0021] Figure 6 Schematic diagram of the sixth type of needle pressing strip structure.
[0022] Figure 7 Schematic diagram of the seventh type of needle pressing strip structure.
[0023] Figure 8 It is a schematic diagram of the eighth type of needle pressing strip structure.
[0024] Fig. 9 Schematic diagram of the ninth type of needle pressing strip structure.
[0025] Fig.10 This is a schematic diagram of the tenth type of needle pressing strip structure.
[0026] Fig.11 This is a schematic diagram of the eleventh type of needle pressing strip structure.
[0027] Fig.12 Schematic diagram of the assembly structure of the needle pressing strip Figure 1 .
[0028] Fig.13 Schematic diagram of the assembly structure of the needle pressing strip Figure 2 .
[0029] Fig.14 This is an enlarged view of part A.
[0030] Fig.15 This is a schematic diagram of the twelfth type of needle pressing strip structure.
[0031] Fig.16 This is a schematic diagram of the thirteenth type of needle pressing strip structure.
[0032] Fig.17 This is a schematic diagram of the fourteenth type of needle pressing strip structure.
[0033] Fig.18 This is a schematic diagram of the fifteenth type of needle pressing strip structure.
[0034] Fig.19 This is a schematic diagram of the sixteenth type of needle pressing strip structure.
[0035] Fig. 20 This is a schematic diagram of the seventeenth type of needle pressing strip structure.
[0036] Fig.21 This is the structural diagram of the first plug-in.
[0037] Fig. 22 This is the structural diagram of the second plug.
[0038] Fig.23 The assembly structure of the needle bar of Example 3 is shown in FIG. Figure 1 .
[0039] Fig.24 The assembly structure of the needle bar of Example 3 is shown in FIG. Figure 2 .
[0040] Fig.25 This is an enlarged view of part B.
[0041] Fig.26The assembly structure of the needle bar of Example 3 is shown in FIG. Figure 3 .
[0042] Fig. 27 The assembly structure of the pressing needle strip of Example 3 is shown in FIG. Figure 4 .
[0043] Fig.28 Schematic diagram of the sinker structure Figure 1 .
[0044] Fig.29 Schematic diagram of the sinker structure Figure 2 .
[0045] 1 is a pressing needle bar; 11 is a lower end surface of the pressing needle bar; 12 is a groove; 121 is a dovetail concave surface; 13 is a first extension section; 131 is an inclined surface; 132 is a front end surface of the first extension section;
[0046] 14 is a second extension section; 15 is a Z-shaped structure; 152 is a side end surface of the Z-shaped structure; 154 is an inner end of the Z-shaped structure; 16 is an elastic arm; 17 is an inclined lower end surface of the pressing needle strip; 18 is a gap; 19 is a steel wire;
[0047] 2 is a needle plate; 3 is a first insert; 31 is a second groove; 4 is a sinker; 5 is a needle plate dovetail plug; 6 is a knitting needle selection pin; 7 is a knitting needle; 71 is an upper end surface of the knitting needle; 8 is a second insert; 9 is a second needle plate dovetail plug. DETAILED DESCRIPTION
[0048] The following will be combined with the attached embodiment of the present invention Figure 1-29 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0049] Example 1 Reference Figure 1-11 A needle presser bar on a horizontal knitting machine includes a needle presser bar 1 arranged in a needle groove formed by two adjacent inserts on a needle plate structure of the horizontal knitting machine, a needle presser surface 11 is arranged at the lower end of the needle presser bar 1 for fitting the upper end surface 71 of the needle, and a groove 12 is provided on the needle presser bar 1 for engaging with a needle plate dovetail plug strip 5 to limit the position of the needle presser bar.
[0050] A presser bar on a flat knitting machine, wherein a second extension section 14 is provided at the front side of a groove 12 of the presser bar 1.
[0051] A presser bar on a flat knitting machine. The front side of the presser bar 1 is provided with a first extension section 13 for extending into a notch of a sinker of the flat knitting machine.
[0052] A needle pressing bar on a flat knitting machine, wherein the rear side of the groove 12 of the needle pressing bar 1 is also provided with a Z-shaped structure 15 corresponding to the protrusion of the knitting needle connecting pin 6.
[0053] A needle pressing strip on a flat knitting machine, the inner walls on both sides of the groove 12 are dovetail concave surfaces 121 corresponding to the dovetail plug strip of the needle plate.
[0054] A needle pressing bar on a flat knitting machine, wherein an elastic arm 16 is arranged on the needle pressing surface 11.
[0055] A needle pressing bar on a flat knitting machine, wherein the needle pressing surface 11 is an inclined needle pressing surface 17 which gradually inclines downward from the rear side toward the front side.
[0056] A needle pressing bar on a flat knitting machine, wherein the needle pressing bar 1 can be provided with a structural member formed by folding a steel wire 19.
[0057] A needle pressing bar on a flat knitting machine, wherein two ends of a steel wire 19 are located on the corresponding lower end surface 11 of the needle pressing bar and a gap 18 is provided between the two ends of the steel wire. The diameter of the steel wire is set to the width of the needle groove.
[0058] A needle presser bar on a flat knitting machine, the range of the lower end surface of the needle presser bar is: the distance from the front end to the needle plate mouth surface, and the rear end to the maximum position of the needle clock of the connecting needle of the needle transfer.
[0059] The utility model relates to a needle pressing bar on a flat knitting machine, wherein the groove is a dovetail groove.
[0060] A needle presser bar on a flat knitting machine, wherein the width of the groove is greater than the needle plate dovetail plug bar 5 above; the front end face 132 of the first extension section on the front side of the lower end face 11 of the needle presser bar does not interfere with the arc swing of the needle latch needle during knitting; the side end face 152 of the Z-shaped structure does not interfere with the upward movement of the needle clock connecting the stitches during needle transfer; the height of the Z-shaped structure is set so as not to be exposed and is lower than the plane of the needle plate inlay, and the height of the second extension section does not interfere with the bottom surface of the needle scale of the small needle plate.
[0061] A needle pressing bar on a flat knitting machine, the thickness of which is set to be the width of a needle groove.
[0062] A needle pressing strip on a flat knitting machine, wherein the thickness of the needle pressing strip 1 is set to be the same as the needle groove width of a needle plate structural member of the flat knitting machine;
[0063] A needle presser bar on a flat knitting machine. The needle presser bar 1 has no Z-shaped structure 15 and a first extension section 13 and is used for a needle plate of a coarse needle flat knitting machine.
[0064] A needle presser bar on a flat knitting machine, wherein the needle presser bar 1 is a structural member with a folded edge at an angle; the needle presser bar has a certain angle, which is used to relatively fix the needle presser bar 1 in a needle groove to facilitate smooth passage of a needle plate dovetail plug strip 5.
[0065] A needle presser bar on a flat knitting machine, wherein the distance between the front end surface 132 of the first extension section of the needle presser bar 1 and the small wire hole at the front end of the needle plate tooth plate is controlled so as not to interfere with the swing range of the tongue needle of the knitting needle; and the rear end 154 of the Z-shaped structure does not interfere with the connection part of the pin when the needle is turned upward.
[0066] A needle presser bar on a flat knitting machine can select needle presser bars of different matching sizes according to actual conditions under the action of a needle plate dovetail plug strip, thereby controlling the first gap between the knitting needle and the needle plate dovetail plug strip to be adjusted to the most reasonable minimum gap. The lower end surface of the needle presser bar is lengthened, which can more effectively reduce the shaking of the needle turning and needle output. The thickness of the needle presser bar is set to the same as the needle groove width to ensure the uniformity of the needle groove and strengthen the bonding stiffness between the needle plate structural member inserts. The inclined design can reduce the running damping of the knitting needle, and the elastic arm setting can reduce the diversity of the needle presser bar settings.
[0067] Example 2 Reference Figure 1-14 , an assembly structure of a needle bar on a flat knitting machine, a plurality of first insert slots and second insert slots are arranged and configured at equal intervals on a needle plate 2, the first insert 3 is installed in the first insert slot, the second insert 8 is installed in the second insert slot, and the insert slots of the needle plate are arranged in a 1-by-1 arrangement, the front end of the insert group composed of the first insert and the second insert is limited by an insert positioning wire, and two adjacent needle slots are formed between each two adjacent first inserts and the second insert, and the needle slots include adjacent first needle slots and second needle slots, and the first needle slot and A knitting needle is placed in each of the second needle grooves, and the two knitting needles are mirror images of each other 7 and are arranged in a 1-for-1 configuration; the dividing line between the two knitting needles corresponds to the second plug-in piece, a toothed piece is placed at the upper mouth of the first plug-in piece groove, the first plug-in piece groove and the second plug-in piece groove are assembled and arranged in a 1-for-1 combination, the sinker 4 is installed in the sinker installation notch of the second groove, the needle pressure bar 1 is installed in the needle groove formed by the first plug-in piece 3 and the second plug-in piece 8, and the needle plate dovetail plug strip 5 passes through the first plug-in piece 3, the second plug-in piece 8 and the groove 12 corresponding to the upper end of the needle pressure bar 1 for limit fixing.
[0068] Example 3 Reference Figure 15-25 A needle presser bar on a horizontal knitting machine includes a needle presser bar 1 arranged in a needle groove formed by two adjacent inserts on a needle plate structure of the horizontal knitting machine, a needle presser surface 11 is arranged at the lower end of the needle presser bar 1 for fitting the upper end surface 71 of the needle, and a groove 12 is provided on the needle presser bar 1 for engaging with a needle plate dovetail plug strip 5 to limit the position of the needle presser bar.
[0069] A needle pressing bar on a flat knitting machine, wherein the needle pressing bar 1 has second extension sections 14 on both sides of a groove 12, and the height of the second extension sections is flush with the upper end of an insert.
[0070] A presser bar on a flat knitting machine. The front side of the presser bar 1 is provided with a first extension section 13 for extending into a notch of a sinker of the flat knitting machine.
[0071] A needle pressing bar on a flat knitting machine, wherein the rear side of the groove 12 of the needle pressing bar 1 is also provided with a Z-shaped structure 15 corresponding to the protrusion of the knitting needle connecting pin 6.
[0072] A needle pressing strip on a flat knitting machine, the inner walls on both sides of the groove 12 are dovetail concave surfaces 121 corresponding to the dovetail plug strip of the needle plate.
[0073] A needle pressing bar on a flat knitting machine, wherein an elastic arm 16 is arranged on the needle pressing surface 11.
[0074] A needle pressing bar on a flat knitting machine, wherein the needle pressing surface 11 is an inclined needle pressing surface 17 which gradually inclines downward from the rear side toward the front side.
[0075] A needle pressing bar on a flat knitting machine, wherein the upper end of a first extension section 13 is a slope 131 inclined forward.
[0076] A needle pressing bar on a flat knitting machine, wherein the second extension section 14 is higher than the first extension section 13 and the Z-shaped structure 15.
[0077] A needle presser bar on a flat knitting machine, the range of the lower end surface of the needle presser bar is: the distance from the front end to the needle plate mouth surface, and the rear end to the maximum position of the needle clock of the connecting needle of the needle transfer.
[0078] A needle presser bar on a flat knitting machine, wherein the groove width is greater than the needle plate dovetail plug bar 5 above; the front end face 132 of the first extension section 13 on the front side of the lower end face 11 of the needle presser bar does not interfere with the knitting needle inlet surface and the arc-shaped swinging of the knitting needle latch needle; the side end face 152 of the Z-shaped structure does not interfere with the upward movement of the needle clock connecting the stitches during needle transfer; the height of the Z-shaped structure is set so as not to be exposed and is lower than the plane of the needle plate inlay, and the height of the second extension section does not interfere with the bottom surface of the needle scale of the small needle plate.
[0079] A needle pressing bar on a flat knitting machine, the thickness of which is set to be the width of a needle groove.
[0080] A needle pressing strip on a flat knitting machine, wherein the thickness of the needle pressing strip 1 is set to be the same as the needle groove width of a needle plate structural member of the flat knitting machine;
[0081] A needle presser bar on a flat knitting machine. The needle presser bar 1 has no Z-shaped structure 15 and a first extension section 13 and is used for a needle plate of a coarse needle flat knitting machine.
[0082] A needle presser bar on a flat knitting machine, wherein the needle presser bar 1 is a structural member with a folded edge at an angle; the needle presser bar has a certain angle, which is used to relatively fix the needle presser bar 1 in a needle groove to facilitate smooth passage of a needle plate dovetail plug strip 5.
[0083] A needle presser bar on a flat knitting machine, wherein the distance between the front end surface 132 of the first extension section 13 of the needle presser bar 1 and the small wire hole at the front end of the needle plate tooth plate is controlled so as not to interfere with the swinging range of the tongue needle of the knitting needle; and the inner end 154 of the Z-shaped structure does not interfere with the connecting part of the pin when the needle is turned upward.
[0084] A needle presser bar on a flat knitting machine can select needle presser bars of different matching sizes according to actual conditions under the action of a needle plate dovetail plug strip, thereby controlling the first gap between the knitting needle and the needle plate dovetail plug strip to be adjusted to the most reasonable minimum gap. The lower end surface of the needle presser bar is lengthened, which can more effectively reduce the shaking of the needle turning and needle output. The thickness of the needle presser bar is set to the same as the needle groove width to ensure the uniformity of the needle groove and strengthen the bonding stiffness between the needle plate structural member inserts. The inclined design can reduce the running damping of the knitting needle, and the elastic arm setting can reduce the diversity of the needle presser bar settings.
[0085] Example 4 Reference Figure 15-29 , an assembly structure of a needle bar on a flat knitting machine, a plurality of first insert slots and second insert slots are arranged and configured at equal intervals on a needle plate 2, the first insert 3 is installed in the first insert slot, the second insert 8 is installed in the second insert slot, and the insert slots of the needle plate are arranged in a 1-by-1 arrangement, the front end of the insert group composed of the first insert and the second insert is limited by an insert positioning wire, and two adjacent needle slots are formed between each two adjacent first inserts and the second insert, and the needle slots include adjacent first needle slots and second needle slots, and the first needle slot and A knitting needle is placed in each of the second needle grooves, and the two knitting needles are mirror images of each other 7 and are arranged in a 1-for-1 configuration; the dividing line between the two knitting needles corresponds to the second plug-in piece, a toothed piece is placed at the upper mouth of the first plug-in piece groove, the first plug-in piece groove and the second plug-in piece groove are assembled and arranged in a 1-for-1 combination, the sinker 4 is installed in the sinker installation notch of the second groove, the needle pressure bar 1 is installed in the needle groove formed by the first plug-in piece 3 and the second plug-in piece 8, and the needle plate dovetail plug strip 5 passes through the first plug-in piece 3, the second plug-in piece 8 and the groove 12 corresponding to the upper end of the needle pressure bar 1 for limit fixing.
[0086] The front end of the first insert piece 3 is extended upward to form a second groove 31 for engaging the second needle plate dovetail plug strip 9 .
[0087] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A needle pressing bar on a flat knitting machine, characterized in that: The invention comprises a needle pressing strip (1) arranged in a needle groove of a knitting needle formed by two adjacent inserts on a needle plate structure of a horizontal knitting machine, a needle pressing surface (11) being arranged at the lower end of the needle pressing strip (1) for fitting against an upper end surface (71) of the knitting needle, and a groove (12) being arranged on the needle pressing strip (1) for engaging with a needle plate dovetail plug strip (5) to limit the position of the needle pressing strip.
2. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: The second extension sections (14) are provided on both sides of the groove (12) of the needle pressing strip (1), and the height of the second extension sections is flush with the upper end of the inserting piece.
3. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: The front side of the needle pressing bar (1) is provided with a first extension section (13) for extending into the notch of the sinker of the flat knitting machine.
4. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: The rear side of the groove (12) of the needle pressing strip (1) is also provided with a Z-shaped structure (15) corresponding to the protrusion of the knitting needle connecting pin (6).
5. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: The inner walls on both sides of the groove (12) of the needle pressing strip (1) are dovetail concave surfaces corresponding to the dovetail plug strip (5) of the needle plate.
6. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: An elastic arm (16) is arranged on the needle pressing surface (11).
7. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: The needle pressing surface (11) is an inclined needle pressing surface (17) which is gradually inclined downward from the rear side toward the front side.
8. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: The upper end of the first extension section (13) is a sloped surface inclined forward.
9. The needle pressing bar on a flat knitting machine according to claim 1, characterized in that: The second extension section (14) is higher than the first extension section (13) and the Z-shaped structure (15).
10. An assembly structure of a presser bar on a flat knitting machine as claimed in claim 1, characterized in that: A plurality of first insert slots and second insert slots are arranged in a combination configuration at equal intervals on the needle plate (2), the first insert slot (3) is installed in the first insert slot, the second insert slot (8) is installed in the second insert slot, and the insert slots are arranged in a 1-by-1 arrangement in the insert slots of the needle plate, the front end of the insert slot group consisting of the first insert slot and the second insert slot is limited by an insert slot positioning wire, two adjacent needle slots are formed between each two adjacent first insert slots and the second insert slot, the needle slots include adjacent first needle slots and second needle slots, and a knitting needle (7) is placed in each of the first needle slot and the second needle slot, The two knitting needles are mirror images of each other and are arranged in a 1-to-1 configuration; the dividing line between the two knitting needles corresponds to the second plug-in plate, a tooth plate is placed at the upper mouth of the first plug-in plate slot, the first plug-in plate slot and the second plug-in plate slot are assembled and arranged in a 1-to-1 combination, the sinker (4) is installed in the sinker installation notch of the second slot, the needle pressure bar (1) is installed in the needle slot formed by the first plug-in plate (3) and the second plug-in plate (8), and the needle plate dovetail plug strip (5) passes through the first plug-in plate (3), the second plug-in plate (8) and the corresponding groove (12) at the upper end of the needle pressure bar (1) for limiting and fixing.