Needle position adjusting device of double-needle machine and sewing equipment

Abstract

The invention relates to a needle position adjusting device of a double-needle machine and sewing equipment, the needle position adjusting device of the double-needle machine comprises two sets of needle rod assembly modules and an adjusting mechanism used for changing the needle position, each set of needle rod assembly module comprises a support, and the support is in linkage with the adjusting mechanism to adapt to adjustment of the needle position; the machine needle is movably mounted on the support; the driving shaft is rotationally mounted on the support and used for driving the machine needle, and when the distance between the two needle rod assembly modules is changed, the driving shaft moves along with the support. According to the technical scheme, the driving shaft and parts of the sewing equipment are decoupled, an independent adjusting unit based on the base and the machine needle is achieved, and therefore the technical scheme that the position of the machine needle is rapidly and accurately adjusted is achieved, and the machine needle adjusting efficiency and the overall production efficiency of the sewing equipment are effectively improved; more importantly, the arrangement of the independent adjusting unit provides a structural basis for realizing needle position adjustment through electric control, so that the automation and intelligence levels of the double-needle machine are improved.

Description

Technical Field

[0001] This application relates to the field of sewing equipment technology, and more particularly to a needle position adjustment device for a double-needle sewing machine and sewing equipment. Background Technology

[0002] Double-needle sewing machines are widely used in the clothing, bag, and furniture industries, offering advantages such as high sewing efficiency and neat, aesthetically pleasing stitches. In actual production, to meet the needs of different sewing processes, it is often necessary to adjust the needle distance between the two needles. However, in existing technology, traditional double-needle sewing machines typically employ a fixed needle chuck structure. The needle position is achieved by manually disassembling the needle chuck and reinstalling it into the preset needle position hole. This method is not only cumbersome and inefficient, but also introduces repetitive positioning errors due to the mechanical intervention involved in each disassembly and reassembly, making it difficult to meet the demands of modern industry for rapid production changeovers and high-precision sewing.

[0003] Furthermore, traditional structures limit the flexibility of needle position adjustment, failing to achieve real-time dynamic adjustment and thus unable to adapt to the automation requirements of needle position changes in certain special process scenarios. Therefore, there is an urgent need for a technical solution that can achieve rapid and precise needle position adjustment via electronic control to improve the intelligence level and production efficiency of dual-needle machines. Summary of the Invention

[0004] This application provides a needle position adjustment device for a double-needle machine, which is a technical solution to achieve rapid and precise adjustment of the needle position, thereby improving the intelligence level and production efficiency of the double-needle machine.

[0005] One embodiment of this application discloses a needle position adjustment device for a dual-needle machine, including two sets of needle bar assembly modules and an adjustment mechanism for changing the needle position. Each set of needle bar assembly modules includes:

[0006] A support, which is linked to the adjustment mechanism to accommodate the adjustment of the needle position;

[0007] The needle is movably mounted on the support;

[0008] The drive shaft is rotatably mounted on the support to drive the needle. When the distance between the two sets of needle bar assembly modules changes, the drive shaft moves with the support.

[0009] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0010] In one embodiment, each set of the needle bar assembly modules further includes:

[0011] Presser foot, used to press down the seam material;

[0012] A take-up lever is used to feed the thread to the needle for processing the fabric.

[0013] In one embodiment, the adjustment mechanism includes:

[0014] The guide component, and the supports of each set of needle bar assembly modules are slidably installed on the guide component;

[0015] The power source is one set and is linked to the support of each set of needle bar assembly modules, or the power source is two sets and is linked to the support of a corresponding set of needle bar assembly modules.

[0016] A power source includes an interactive lead screw and nut pair and a drive component for driving the lead screw and nut pair to move, with a corresponding support linked to the lead screw and nut pair for controlled movement.

[0017] In one embodiment, each set of the needle bar assembly module further includes:

[0018] A needle bar holder, wherein the machine needle is mounted on the lower end of the needle bar, and the needle bar slides through the needle bar holder;

[0019] The drive shaft includes:

[0020] The first axis drives the needle to reciprocate linearly relative to the needle bar frame;

[0021] The second axis, the needle bar holder is fixed to the second axis and swings back and forth relative to the support with the second axis.

[0022] In one embodiment, each set of the needle bar assembly module further includes:

[0023] Angle groove, fixed to the second shaft;

[0024] An angle slider slides in conjunction with the angle groove, and the angle slider is fixedly connected to the needle.

[0025] In one embodiment, the needle position adjustment device further includes:

[0026] The first synchronization mechanism allows the first and second shafts in the two sets of needle bar assembly modules to rotate synchronously in correspondence with each other.

[0027] In one embodiment, the needle position adjustment device further includes:

[0028] The upper shaft slides axially with the first shaft in one of the needle bar assembly modules and rotates synchronously in the circumferential direction.

[0029] The swing shaft slides axially with the second shaft in one of the needle bar assembly modules and rotates synchronously in the circumferential direction.

[0030] In one embodiment, the support has opposing front and rear sides, and the interior of the support has a receiving chamber;

[0031] The drive shaft is rotatably mounted on the wall of the receiving chamber. One end of the first shaft and the second shaft extends into the receiving chamber and is linked with the needle. The other end extends out of the receiving chamber and is connected to the upper shaft and the swing shaft respectively through a transmission component that slides axially.

[0032] The transmission component includes a bushing sleeve fitted on two corresponding shafts and a keyway assembly disposed between the bushing sleeve and the shafts. The bushing sleeve is fixed to one of the shafts and is engaged with the other shaft through axial sliding and circumferential transmission via the keyway assembly.

[0033] In one embodiment, the two sets of needle bar assembly modules move away from or closer to each other in the left-right direction, and the needles move relative to each other in the height direction;

[0034] The upper shaft includes an independent first shaft and a second shaft, which are located on opposite sides of the two sets of needle bar assembly modules in the left and right directions and cooperate with the first shaft of different needle bar assembly modules; the first shaft and the second shaft rotate synchronously through a second synchronization mechanism;

[0035] The swing shaft includes an independent third shaft and a fourth shaft, which are located on both sides of the two sets of needle bar assembly modules in the left and right directions and cooperate with the second shaft of different needle bar assembly modules; the third shaft and the fourth shaft rotate synchronously through a third synchronization mechanism;

[0036] In the front-to-back direction, the second synchronization mechanism and the third synchronization mechanism are located on the rear side of the two sets of needle bar assembly modules.

[0037] One embodiment of this application also discloses a sewing device, including the needle position adjustment device described in the above technical solution.

[0038] The technical solution disclosed in this application decouples the drive shaft from the components of the sewing equipment, realizing an independent adjustment unit based on the base and the needle. This enables rapid and precise adjustment of the needle position, effectively improving the needle adjustment efficiency and the overall production efficiency of the sewing equipment. More importantly, the independent adjustment unit provides a structural basis for electronically controlled needle position adjustment, thereby improving the automation and intelligence level of the double-needle sewing machine. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the sewing equipment structure in one embodiment of this application;

[0041] Figure 2 for Figure 1 The structural diagram of the sewing equipment in the image is omitted, omitting the machine casing and base.

[0042] Figure 3 This is a schematic diagram of the needle position adjustment device in one embodiment of this application, omitting one support.

[0043] Figure 4 for Figure 3 A schematic diagram of the needle position adjustment device after omitting one needle bar assembly module;

[0044] Figure 5 for Figure 4 The exploded view of the needle bar assembly module is omitted in the image.

[0045] Figure 6 A schematic diagram showing the connection between the needle bar assembly module and the adjustment mechanism;

[0046] Figure 7 and Figure 8 Schematic diagrams of the machine needle, needle bar holder, first axis, and second axis from different perspectives;

[0047] Figure 9 This is a schematic diagram of the back of a sewing device in one embodiment of this application;

[0048] Figure 10 This is a schematic diagram of the structure of the needle position adjustment device in one embodiment of this application after omitting two needle bar assembly modules;

[0049] Figure 11 Here are simplified motion diagrams of the second and third synchronization mechanisms;

[0050] Figure 12 This is a schematic diagram of the shaft engagement during the movement of the needle bar assembly module.

[0051] The component labels are as follows:

[0052] 201. Fabric feeding shaft; 202. Fabric feeding linkage mechanism;

[0053] 400. Needle; 401. Needle bar holder; 402. Needle control lever assembly; 4021. Needle bar cam; 4022. Needle bar hinge pin; 4023. Needle bar rocker arm; 4024. Angle groove; 4025. Angle slider; 410. Support; 411. Receiving chamber; 412. Shielding edge; 420. Drive shaft; 421. First shaft; 422. Second shaft; 423. Transmission component; 4231. Bushing; 4232. Radial screw; 4233. Mating key; 4234. Extension groove; 4235. Axial clearance; 430. Presser foot; 431. Lifting foot arm; 432. Drive frame; 433. Drive swing arm; 440. Thread take-up lever; 441. Thread take-up pivot; 442. Hinge sleeve; 450. Top thread assembly;

[0054] 500. Adjusting mechanism; 510. Guide component; 520. Power source; 521. Lead screw; 522. Coupling; 523. Adjusting motor; 524. Adjusting seat; 525. Adjusting bracket;

[0055] 901. Housing; 9011. Mounting plate; 902. Base; 9021. Sewing table; 9022. Sewing space; 903. Lower shaft; 904. Upper shaft; 9041. First shaft; 9042. Second shaft; 9043. Second synchronization mechanism; 9044. First synchronization shaft; 9045. Synchronization gear train; 905. Swing shaft; 9051. Third shaft; 9052. Fourth shaft; 9053. Third synchronization mechanism; 9054. Second synchronization shaft; 9055. Synchronization linkage group; 906. First synchronization mechanism; 907. Needle position control assembly. Detailed Implementation

[0056] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0057] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level (or in a usage state, or from a certain viewpoint in the drawing) than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level (or in a usage state, or from a certain viewpoint in the drawing) than the second feature.

[0060] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0061] To achieve rapid and precise adjustment of needle positions in multi-needle sewing machines, this application discloses a needle position adjustment device for a dual-needle sewing machine. The device includes two sets of needle bar assembly modules and an adjustment mechanism for changing the needle position. Each needle bar assembly module includes a support linked to the adjustment mechanism to adapt to needle position adjustment, a needle movably mounted on the support, and a drive shaft rotatably mounted on the support. The movement of the needle is controlled by controlling the movement of the support relative to the sewing equipment. Compared to existing technologies that separately control the needle, the drive shaft used to drive the needle in this application is decoupled from its power source, allowing the drive shaft to move with the support when the distance between the two needle bar assembly modules changes. This configuration establishes an independent adjustment unit based on the base and needle, effectively improving needle adjustment efficiency and the overall production efficiency of the sewing equipment. More importantly, the independent adjustment unit provides a structural basis for electrically controlled needle position adjustment, thereby improving the automation and intelligence level of the dual-needle sewing machine.

[0062] For details on the implementation of the regulating mechanism 500, please refer to the appendix. Figure 1 To be continued Figure 9In the illustrated embodiment, the adjustment mechanism 500 includes a guide 510 for defining the direction of movement and a power source 520 for providing power. The supports 410 of each needle bar assembly module are slidably mounted on the guide 510. In this embodiment, the guide 510 includes a slider and a slide rail that cooperate with each other, one of which is mounted on the support 410, and the other is positioned on the sewing equipment. For example, see attached... Figure 1 The sewing equipment includes a base 902 for providing a sewing table 9021 and a housing 901 located on the base 902. One end of the housing 901 is connected to the base 902, and the other end extends parallel to the sewing table 9021 to form a sewing space 9022. A mounting plate 9011 is fixedly installed inside the housing 901, and a slide rail is fixed to the mounting plate 9011. A support 410 is slidably fitted to the mounting plate 9011 via a slider. Guide members 510 are arranged in groups, with each group of guide members 510 corresponding to one of the supports 410. The groups of guide members 510 are arranged in parallel in the height direction to constrain different positions of the supports 410. Guide members 510 at the same location on different supports 410 are aligned with each other, and aligned guide members 510 can share the same slide rail.

[0063] The power source 520 of the adjusting mechanism 500 can be set separately for each support 410. That is, there are two sets of power sources 520, each linked to a corresponding set of support 410 of the needle bar assembly module. The two sets of power sources 520 can be configured identically or differently, for example, using a screw and nut pair to achieve individual drive of each support 410. See also the appendix. Figure 9 In the illustrated embodiment, only one set of power source 520 is provided, and each set of power source 520 is linked to the support 410 of each needle bar assembly module. One set of power source 520 includes an interactive lead screw and nut pair and a driving component for driving the lead screw and nut pair. The corresponding support 410 is linked to the lead screw and nut pair for controlled movement. The lead screw and nut pair can be implemented in various ways. For example, the lead screw 521 can actively rotate to drive the nut to change position; another example is that the lead screw 521 actively rotates while the nut is fixed to achieve a change in the position of the lead screw 521; yet another example is that the lead screw 521 is fixed while the nut actively rotates to change its own position. In this embodiment, the lead screw 521 is axially limited and circumferentially movable, positioned on the mounting plate 9011. The lead screw 521 is linked to the adjusting motor 523, which serves as the driving component, via a coupling 522. Two adjusting seats 524, which act as nuts, are movably fitted on the lead screw 521. The lead screw 521 and each adjusting seat 524 constitute the lead screw and nut pair. Each adjustment seat 524 is interconnected with the corresponding support 410 via an adjustment bracket 525.

[0064] For ease of overall layout, the adjusting mechanism 500 and the support 410 are located on opposite sides of the mounting plate 9011. The adjusting bracket 525 extends from one side of the mounting plate 9011, crosses the side edge of the mounting plate 9011, and connects to the support 410 located on the other side of the mounting plate 9011. The adjusting bracket 525 is connected to at least the top and bottom of the support 410, and the guide 510 is located near the connection point between the adjusting bracket 525 and the support 410.

[0065] For information on the driving method of the 400 needle, please refer to the attached document. Figure 4 To be continued Figure 8 In the illustrated embodiment, each needle bar assembly module further includes a needle bar holder 401. The needle 400 is mounted on the lower end of the needle bar, and the two move synchronously. The needle bar slides through the needle bar holder 401. The needle bar holder 401 has a C-shaped structure. The two ends of the C-shaped opening slide with the needle bar to define the movement direction of the needle bar and the needle 400. The opening area of ​​the C-shape is used to accommodate the control rod assembly 402, which controls the movement of the needle bar and the needle 400. The needle bar holder 401, the control rod assembly 402, and the drive shaft 420 are linked to realize the movement of the needle 400 according to a preset mode. The drive shaft 420 includes a first shaft 421 and a second shaft 422 arranged in parallel. The first shaft 421 drives the needle 400 to reciprocate linearly relative to the needle bar holder 401 through the control rod assembly 402. The needle bar holder 401 is fixed to the second shaft 422 and swings back and forth relative to the support 410 with the second shaft 422. (Refer to the attached diagram) Figure 5 To be continued Figure 8 As shown, the needle control lever assembly 402 includes a needle bar cam 4021 that rotates with the first shaft 421, a needle bar hinge shaft 4022 fixed to the needle 400, and a needle bar rocker arm 4023 hinged to the needle bar cam 4021 and the needle bar hinge shaft 4022. The needle bar rocker arm 4023 and the needle bar cam 4021 convert the rotation of the first shaft 421 into the reciprocating motion of the needle 400. To further improve the stability of the needle 400's movement, a sliding assembly is also provided between the needle bar frame 401 and the needle bar rocker arm 4023. The sliding assembly includes an angled groove 4024 and an angled slider 4025. That is, each needle bar assembly module also includes an angled groove 4024 and an angled slider 4025. The angled groove 4024 is fixed to the needle bar frame 401, that is, fixed to the second shaft 422. The angled groove 4024 is located in the C-shaped opening area and is open away from the second shaft 422. Angle groove 4024 extends in the height direction, and angle slider 4025 slides in engagement with angle groove 4024. Angle slider 4025 is located at the hinge point between needle bar rocker arm 4023 and needle bar hinge pin 4022. Needle bar hinge pin 4022 is clamped on the needle bar of needle 400, so it can also be understood that angle slider 4025 is fixedly connected to needle 400.

[0066] In addition to addressing the issue of the needle 400 moving with the support 410, the needle position adjustment of the needle 400 also requires solving the problem of how the drive shaft 420 achieves transmission during movement. See the attached document for details. Figure 2 To be continued Figure 5 In the illustrated embodiment, the needle position adjustment device further includes an upper shaft 904 and a swing shaft 905. The upper shaft 904 is axially slidingly engaged with a first shaft 421 in one of the needle bar assembly modules and rotates synchronously in the circumferential direction; the swing shaft 905 is axially slidingly engaged with a second shaft 422 in one of the needle bar assembly modules and rotates synchronously in the circumferential direction. The axial sliding engagement releases the axial travel between the upper shaft 904 and the first shaft 421, and between the swing shaft 905 and the second shaft 422, thereby achieving needle position adjustment; the synchronous circumferential rotation locks the relative circumferential positions between the upper shaft 904 and the first shaft 421, and between the swing shaft 905 and the second shaft 422, thereby achieving needle 400 motion control. The axial sliding engagement and synchronous circumferential rotation can be achieved through a transmission component 423, see attached figure. Figure 5 and attached Figure 12 In the illustrated embodiment, the transmission component 423 includes a bushing 4231 sleeved on two corresponding shafts and a keyway assembly disposed between the bushing 4231 and the shafts. The bushing 4231 is fixed to one shaft and is axially sliding and circumferentially driven to the other shaft via the keyway assembly. In this embodiment, the bushing 4231 is positioned on the upper shaft 904 or the swing shaft 905 by a radial screw 4232 and is movably engaged with the first shaft 421 or the second shaft 422 via the keyway assembly. A mating key 4233 is fixedly provided on the first shaft 421 and the second shaft 422, and an extension groove 4234 is provided on the bushing 4231. When the needle bar assembly modules move closer together, the mating key 4233 slides in the extension groove 4234 to release the movement stroke, and the first shaft 421 or the second shaft 422 is pulled out from the corresponding bushing 4231, forming an axial gap 4235 with the upper shaft 904 or the swing shaft 905; when the needle bar assembly modules move away from each other, the mating key 4233 slides in the extension groove 4234 to release the movement stroke, and the first shaft 421 or the second shaft 422 enters the corresponding bushing 4231, reducing or eliminating the axial gap 4235 between it and the upper shaft 904 or the swing shaft 905.

[0067] The movements of the first shaft 421 and the second shaft 422 are in a certain coordination relationship, that is, there is a coordination relationship between the upper shaft 904 and the swing shaft 905. A first synchronization mechanism 906 can be set between the first shaft 421 and the second shaft 422 and / or between the upper shaft 904 and the swing shaft 905 to meet the above coordination requirements. That is, the first shaft 421 and the second shaft 422 in the two sets of needle bar assembly modules rotate synchronously with each other through the first synchronization mechanism 906.

[0068] The first synchronization mechanism 906 can be flexibly positioned. (See attached document) Figure 2In the illustrated embodiment, the upper shaft 904 and the lower shaft 903 located on the base 902 are motion-matched via pulleys. The lower shaft 903 is motion-matched with the feed shaft 201 via the feed linkage mechanism 202. The first synchronization mechanism 906 is disposed between the feed shaft 201 and the swing shaft 905. The advantage of this arrangement is that the feed shaft 201 participates in controlling the movement of the feed dog that cooperates with the needle 400, and the swing shaft 905 participates in the swing of the needle 400. The two can achieve accurate synchronization from a mechanical structure perspective, ensuring production safety. At the same time, the first synchronization mechanism 906 acts on both the needle 400 and the feed dog, providing a suitable installation position for the needle position control component 907. The needle position control component 907 can easily realize the synchronous adjustment of the needle 400 and the feed dog. The needle position control assembly 907 includes an adjustable position control arm for limiting the spatial movement position of the components in the first synchronization mechanism 906, thereby changing the working state of the first synchronization mechanism 906, the feed shaft 201, the swing shaft 905, the needle 400, and the feed dog.

[0069] The support 410 provides a mounting platform, allowing for synchronized adjustment of related accessories that mate with the needle 400, thereby further improving adjustment efficiency. (See attached image) Figure 1 In the illustrated embodiment, each needle bar assembly module further includes a presser foot 430 for pressing down the fabric, mounted on the support 410; a thread take-up bar 440 for feeding the thread to the needle 400 to process the fabric; and a thread assembly 450 for holding the top thread. All of these components can move relative to the sewing equipment with the support 410, thereby enabling flexible adjustment of the needle position.

[0070] For specific settings of presser foot 430, please refer to the attached document. Figure 6 In the illustrated embodiment, the presser foot 430 penetrates the top and bottom surfaces of the support 410. A lifting arm 431 is fixed to the middle of the presser foot 430. The lifting arms 431 of the presser feet 430 of each needle bar assembly module are aligned and constrained by the same drive frame 432. The drive frame 432 is located on the side of the support 410 facing the mounting plate 9011. The drive frame 432 has an open hole extending in the left-right direction to allow the presser feet 430 of each needle bar assembly module to move away from each other. A drive swing arm 433 is provided on the side of the mounting plate 9011 facing away from the support 410. The drive swing arm 433 has a drive head that penetrates the mounting plate 9011 and cooperates with the drive frame 432. The drive swing arm 433 is used to drive the drive frame 432 to move in the height direction to simultaneously lift the presser feet 430 of each needle bar assembly module, facilitating sewing operations. The drive swing arm 433 can be equipped with a corresponding drive structure or transmission structure to facilitate manual operation or electronic control.

[0071] For specific settings of the 440 line take-up lever, please refer to the attached document. Figure 5In the illustrated embodiment, the thread take-up lever 440 is rotatably fitted to the top of the support 410 via the thread take-up pivot 441. One end of the thread take-up lever 440 is located outside the support 410 to act on the suture thread, and the other end extends into a rod shape with a hinge sleeve 442 slidably fitted on it. The hinge sleeve 442 is hinged to the needle bar rocker arm 4023. The hinge axes of the needle bar rocker arm 4023 and the needle bar cam 4021 are not coaxial with the hinge shafts of the hinge sleeve 442 and the needle bar rocker arm 4023.

[0072] For the specific structure of support 410, please refer to the attached document. Figure 5 In the illustrated embodiment, the support 410 constitutes a housing mechanism with opposing front and rear sides, and the interior of the support 410 contains a receiving chamber 411. A drive shaft 420 is rotatably mounted on the wall of the receiving chamber 411. One end of both the first shaft 421 and the second shaft 422 extends into the receiving chamber 411 and is linked to the needle 400; the other end extends out of the receiving chamber 411, and the extended end is connected to the upper shaft 904 and the swing shaft 905 respectively via a transmission component 423 with axial sliding engagement. The supports 410 of the two needle bar assembly modules are open on opposite sides, and their open side edges are distinct. One side edge of one support 410 covers the outer side edge of the other support 410, forming a shielding edge 412. When the supports 410 of the two needle bar assembly modules move relative to each other, the overlapping side edges of the two supports 410 always shield the receiving chamber 411. The support 410 of the two sets of needle bar assembly modules has a shielding edge 412 on the opposite side that cooperates with the housing 901 to shield the gap during the movement.

[0073] For easier layout of the components of the needle bar assembly module, please refer to the attached document. Figure 10 To be continued Figure 12 In the illustrated embodiment, the two sets of needle bar assembly modules are positioned apart or closer to each other in the left-right direction, and the needles 400 move relative to each other in the height direction. The upper shaft 904 includes independent first shaft 9041 and second shaft 9042, which are located on opposite sides of the two sets of needle bar assembly modules in the left-right direction and cooperate with the first shaft 421 of different needle bar assembly modules; the first shaft 9041 and second shaft 9042 rotate synchronously through a second synchronization mechanism 9043. In the front-back direction, the second synchronization mechanism 9043 is located at the rear of the two sets of needle bar assembly modules. This arrangement can prevent interference with the upper shaft 904 due to the movement of the components of the needle bar assembly modules. The second synchronization mechanism 9043 includes a first synchronization shaft 9044 parallel to the first shaft 9041 and second shaft 9042, and synchronization gear trains 9045 disposed between the first synchronization shaft 9044 and the first shaft 9041 and between the first synchronization shaft 9044 and the second shaft 9042, with the synchronization gear trains 9045 interconnected by belts.

[0074] The swing shaft 905 includes independent third shaft 9051 and fourth shaft 9052, which are located on opposite sides of the two needle bar assembly modules in the left-right direction and cooperate with the second shaft 422 of different needle bar assembly modules. The third shaft 9051 and fourth shaft 9052 rotate synchronously through a third synchronization mechanism 9053. In the front-back direction, the third synchronization mechanism 9053 is located at the rear of the two needle bar assembly modules. This arrangement can prevent the movement of the various components of the needle bar assembly modules from interfering with the movement of the swing shaft 905. The third synchronization mechanism 9053 includes a second synchronization shaft 9054 arranged parallel to the third shaft 9051 and the fourth shaft 9052, and a synchronization link group 9055 arranged between the second synchronization shaft 9054, the third shaft 9051 and between the second synchronization shaft 9054 and the fourth shaft 9052. The synchronization link group 9055 includes a first rocker arm fixed to the second synchronization shaft 9054, a second rocker arm fixed to the third shaft 9051 and the fourth shaft 9052, and a synchronization rod hinged between the first rocker arm and the second rocker arm.

[0075] Based on the above, and in conjunction with the appendix Figure 1 To be continued Figure 2 As shown, one embodiment of this application also discloses a sewing device, including the needle position adjustment device described above. The specific configuration of the needle position adjustment device is given above. The parts of the sewing device not described herein are implemented in conjunction with existing technology and will not be repeated here.

[0076] The technical solution in this application includes at least the following technical advantages:

[0077] 1. Enables rapid electronic adjustment of dual-needle positions. The adjustment mechanism allows users to adjust the needle position with a single button, eliminating the tedious process of manually disassembling and assembling the needle clamp, significantly improving operational efficiency, and making it particularly suitable for industrial applications requiring rapid production changes.

[0078] 2. Ensure high repeatability and positioning accuracy in needle position adjustment. The guide components (high-precision guide rail) and power source (adjustment seat, lead screw, and adjustment motor) in the adjustment mechanism work together to ensure that the needle bar moves in a precise and consistent position each time, effectively meeting the precision requirements of high-quality sewing and avoiding human error.

[0079] 3. Possesses excellent intelligence and process adaptability. The structural design supports rapid switching between different needle positions, and combined with the control system, it can realize needle position preset, recall, and automatic matching, improving the overall machine's intelligent control level and ease of operation.

[0080] 4. Achieving synchronous transmission while maintaining structural independence. Each needle bar assembly module maintains consistency in thread take-up and fabric insertion actions through a synchronization mechanism, ensuring synchronization accuracy and thread quality during the sewing process.

[0081] 5. The presser foot features an independent left and right structure design. The presser foot moves synchronously with the needle bar, effectively solving the problem of fabric offset caused by changes in needle position, adapting to the sewing needs of fabrics of different widths and shapes, and improving sewing stability and adaptability.

[0082] 6. Significantly reduces mechanical intervention and component wear. The electronically controlled structure replaces the traditional method of disassembling and assembling the pin chuck, avoiding errors and wear caused by repeated mechanical intervention, extending the service life of the equipment, and improving stability and ease of maintenance.

[0083] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A needle position adjustment device for a double-needle machine, comprising two sets of needle bar assembly modules and an adjustment mechanism for changing the needle position, characterized in that, Each needle bar assembly module includes: A support, which is linked to the adjustment mechanism to accommodate the adjustment of the needle position; The needle is movably mounted on the support; The drive shaft is rotatably mounted on the support to drive the needle. When the distance between the two sets of needle bar assembly modules changes, the drive shaft moves with the support.

2. The needle position adjustment device of the double-needle machine according to claim 1, characterized in that, Each set of the needle bar assembly module also includes: respectively installed on the support: Presser foot, used to press down the seam material; A take-up lever is used to feed the thread to the needle for processing the fabric.

3. The needle position adjustment device of the double-needle machine according to claim 1, characterized in that, The adjustment mechanism includes: The guide component, and the supports of each set of needle bar assembly modules are slidably installed on the guide component; The power source is one set and is linked to the support of each set of needle bar assembly modules, or the power source is two sets and is linked to the support of a corresponding set of needle bar assembly modules. A power source includes an interactive lead screw and nut pair and a drive component for driving the lead screw and nut pair to move, with a corresponding support linked to the lead screw and nut pair for controlled movement.

4. The needle position adjustment device of the double-needle machine according to claim 1, characterized in that, Each set of the needle bar assembly module also includes: A needle bar holder, wherein the machine needle is mounted on the lower end of the needle bar, and the needle bar slides through the needle bar holder; The drive shaft includes: The first axis drives the needle bar to reciprocate linearly relative to the needle bar frame; The second axis, the needle bar holder is fixed to the second axis and swings back and forth relative to the support with the second axis.

5. The needle position adjustment device of the double-needle machine according to claim 4, characterized in that, Each set of the needle bar assembly module also includes: Angle groove, fixed to the second shaft; An angle slider slides in conjunction with the angle groove, and the angle slider is fixedly connected to the needle.

6. The needle position adjustment device of the double-needle machine according to claim 4, characterized in that, The needle position adjustment device further includes: The first synchronization mechanism allows the first and second shafts in the two sets of needle bar assembly modules to rotate synchronously in correspondence with each other.

7. The needle position adjustment device of the double-needle machine according to claim 4, characterized in that, The needle position adjustment device further includes: The upper shaft slides axially with the first shaft in one of the needle bar assembly modules and rotates synchronously in the circumferential direction. The swing shaft slides axially with the second shaft in one of the needle bar assembly modules and rotates synchronously in the circumferential direction.

8. The needle position adjustment device for a double-needle machine according to claim 7, characterized in that, The support has opposing front and rear sides, and the interior of the support has a receiving chamber; The drive shaft is rotatably mounted on the wall of the receiving chamber. One end of the first shaft and the second shaft extends into the receiving chamber and is linked with the needle. The other end extends out of the receiving chamber and is connected to the upper shaft and the swing shaft respectively through a transmission component that slides axially. The transmission component includes a bushing sleeve fitted on two corresponding shafts and a keyway assembly disposed between the bushing sleeve and the shafts. The bushing sleeve is fixed to one of the shafts and is engaged with the other shaft through axial sliding and circumferential transmission via the keyway assembly.

9. The needle position adjustment device for a double-needle machine according to claim 7, characterized in that, The two sets of needle bar assembly modules move away from or towards each other in the left-right direction, and the needle bars move relative to each other in the height direction; The upper shaft includes an independent first shaft and a second shaft, which are located on opposite sides of the two sets of needle bar assembly modules in the left and right directions and cooperate with the first shaft of different needle bar assembly modules; the first shaft and the second shaft rotate synchronously through a second synchronization mechanism; The swing shaft includes an independent third shaft and a fourth shaft, which are located on both sides of the two sets of needle bar assembly modules in the left and right directions and cooperate with the second shaft of different needle bar assembly modules; the third shaft and the fourth shaft rotate synchronously through a third synchronization mechanism; In the front-to-back direction, the second synchronization mechanism and the third synchronization mechanism are located on the rear side of the two sets of needle bar assembly modules.

10. A sewing machine, characterized in that, The device includes the needle position adjustment device according to any one of claims 1 to 9.

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