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

Abstract

The invention relates to a needle position adjusting device of sewing equipment and the sewing equipment of a double-needle machine, and the needle position adjusting device of the sewing equipment comprises two sets of shuttle frame assembly modules which are respectively used for being matched with machine needles of the sewing equipment; the two sets of shuttle frame assembly modules are respectively mounted on the lower shaft in a sliding manner; and the driving mechanism is used for driving the two sets of shuttle frame assembly modules to adjust the positions along the lower shaft by adopting a screw-nut pair. According to the needle position adjusting device, the positions of the two shuttle frame assembly modules are adjusted through the driving mechanism, so that the tedious operation of manually loosening a shuttle frame, adjusting feed dogs and replacing a needle plate during needle position replacement is effectively avoided, and the whole adjusting process is more efficient and accurate. Therefore, the technical scheme has the technical advantages of being low in operation difficulty, high in production efficiency, high in intelligent degree and good in adaptability to different garment process requirements.

Description

Technical Field

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

[0002] Traditional double-needle sewing machines are widely used in garment manufacturing processes such as trouser loops, waistbands, and tents, creating two parallel stitches and improving sewing efficiency. However, for different garment manufacturing processes, the left and right needle bars of traditional double-needle machines are usually fixed. If the spacing between the two parallel stitches needs to be adjusted, the needle position parts must be replaced, which is a rather cumbersome process.

[0003] When changing the needle position, the shuttle frame needs to be adjusted accordingly due to the change in needle spacing. Otherwise, the fit between the shuttle tip and the needle may deviate, affecting stitch quality. Simultaneously, the feed dog and needle plate also need to be replaced. During this process, the operator needs to manually loosen the shuttle frame's fixing screws, move the shuttle frame to the appropriate position, and then re-fix it. Simultaneously, the operator needs to remove the feed dog and needle plate's fixing screws, replace them with feed dogs and needle plates matching the new needle spacing, and then reinstall and fix them. As can be seen, this process is cumbersome, increases the difficulty and time cost of adjustment, and requires precise adjustments by experienced operators; otherwise, the sewing quality may be affected.

[0004] Therefore, how to conveniently achieve needle position adjustment, especially the relative spacing adjustment of the needle bar in dual-needle machines, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This application provides a needle position adjustment device for sewing equipment, which can conveniently realize the position adjustment of the shuttle frame assembly module, greatly improve the needle position adjustment efficiency and production efficiency, and provide a basis for the automated control of needle position adjustment.

[0006] One embodiment of this application discloses a needle position adjustment device for a sewing machine, used to cooperate with the sewing machine needle to operate the sewing thread. The sewing machine includes a lower shaft providing driving force, and the shuttle assembly module includes:

[0007] A shuttle frame is mounted on the lower shaft and slidably positioned along the lower shaft.

[0008] A rotary shuttle, linked to the lower shaft, is rotatably mounted on the shuttle frame;

[0009] A needle plate is fixed to the shuttle frame, and the needle plate has an clearance opening;

[0010] The feed dog is linked to the lower shaft and is movably disposed in the clearance opening;

[0011] During the sliding of the shuttle frame along the lower shaft, the rotary shuttle, the needle plate, and the feed dog all move synchronously with the shuttle frame.

[0012] 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.

[0013] In one embodiment, the two sets of shuttle frame assembly modules slide along the lower axis and move synchronously in opposite directions or move independently, wherein the synchronous in opposite directions are constrained by mechanical structures or by control signals.

[0014] In one embodiment, the drive mechanism includes:

[0015] A guide screw is fixedly installed and parallel to the extension direction of the lower shaft. A nut seat that is rotatably installed in the shuttle frame assembly module is engaged with the guide screw.

[0016] A drive unit, which is a motor and / or a hand handle, is connected to a nut seat in each of the shuttle assembly modules.

[0017] In one embodiment, the nut seat is hollow to provide a threaded cavity, the threaded cavity is provided with a threaded member that engages with the guide screw and a transmission member that engages with the threaded member, the drive member is mounted on the outside of the nut seat and drives the threaded member to rotate through the transmission member.

[0018] In one embodiment, the drive mechanism includes:

[0019] The fixing base has mounting holes;

[0020] The adjusting screw rotates and is axially positioned through the mounting hole, and each shuttle frame assembly module is fixedly installed with a nut seat that is threadedly engaged with the adjusting screw;

[0021] A driving component, which is a motor and / or a hand lever, is connected to an adjusting screw drive.

[0022] In one embodiment, the adjusting screw is provided as one unit, and each shuttle frame assembly module cooperates with the same adjusting screw through a corresponding nut seat; or

[0023] The system has multiple adjusting screws, and each shuttle frame assembly module is connected to a different adjusting screw through a corresponding nut seat.

[0024] In one embodiment, the shuttle assembly module includes:

[0025] The shuttle frame is slidably fitted along the lower shaft, and the shuttle frame is threadedly fitted with the corresponding drive mechanism.

[0026] The feed dog is installed on the shuttle frame and is connected to the lower shaft. As the shuttle frame slides along the lower shaft, the feed dog moves synchronously with the shuttle frame.

[0027] A rotary shuttle is rotatably mounted on the shuttle frame and connected to the lower shaft. As the shuttle frame slides along the lower shaft, the rotary shuttle moves synchronously with the shuttle frame.

[0028] A needle plate is fixed to the shuttle frame, and the needle plate has an clearance opening. The feed dog is movably disposed in the clearance opening.

[0029] In one embodiment, the needle position adjustment device further includes:

[0030] A fabric feeding shaft, the lower shaft is connected to and arranged parallel to the lower shaft, and each set of shuttle frame assembly modules is respectively sleeved on the fabric feeding shaft;

[0031] The shuttle frame assembly module also includes:

[0032] The tooth-lifting slide shaft is rotatably mounted on the shuttle frame, and the tooth-lifting slide shaft is slidably positioned and sleeved on the lower shaft and rotates synchronously with the lower shaft;

[0033] A feeding slide shaft is rotatably mounted on the shuttle frame. The feeding slide shaft is slidably positioned on the feeding shaft and rotates synchronously with the feeding shaft.

[0034] The rotation of the lifting tooth slide shaft is transmitted to the rotary hook, and the rotation of the lifting tooth slide shaft and the feeding slide shaft are coupled to the feeding tooth.

[0035] In one embodiment, the needle position adjustment device further includes:

[0036] The feed dog linkage mechanism includes a feed dog cam that rotates with the feed dog sliding shaft, a feed dog connecting rod driven by the feed dog cam, a feed dog crank that rotates with the feed dog sliding shaft, and a feed dog frame that is hinged at both ends to the feed dog connecting rod and the feed dog crank, respectively. The feed dog is mounted on the feed dog frame.

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

[0038] The needle position adjustment device of this application realizes the position adjustment of two sets of shuttle frame assembly modules through a drive mechanism, thereby effectively solving the cumbersome operation of manually loosening the shuttle frame, adjusting the feed dog, and changing the needle plate when changing the needle position, making the entire adjustment process more efficient and precise. Therefore, the above technical solution has the technical advantages of low operation difficulty, high production efficiency, high degree of intelligence, and good adaptability to different garment process requirements. 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 base portion of a sewing device in one embodiment of this application;

[0041] Figure 2 for Figure 1 A schematic diagram of the needle position adjustment device in a sewing machine.

[0042] Figure 3 This is a schematic diagram of the needle position adjustment device in another embodiment of this application;

[0043] Figure 4 for Figure 3 A schematic diagram showing the cooperation between the shuttle frame assembly module and the drive mechanism;

[0044] Figure 5 for Figure 4 A schematic diagram of the assembly of various components in the needle position adjustment device from a cross-sectional perspective;

[0045] Figure 6 This is a schematic diagram of the needle position adjustment device in another embodiment of this application;

[0046] Figure 7 for Figure 6 A schematic diagram showing the cooperation between the shuttle frame assembly module and the drive mechanism;

[0047] Figure 8 for Figure 7 A schematic diagram of the internal fittings of the nut seat in the shuttle frame assembly module;

[0048] Figure 9 for Figure 2 A partially enlarged schematic diagram of the base of the sewing equipment in the diagram;

[0049] Figure 10 This is a schematic diagram of the shuttle frame assembly module structure of a sewing device in one embodiment of this application;

[0050] Figure 11 for Figure 10 Another perspective view of the shuttle frame component module;

[0051] Figure 12 This is a schematic diagram of the cooperation between the feed shaft and the feed slide shaft in one embodiment of this application;

[0052] Figure 13 for Figure 12 A schematic diagram of the fabric feeding slide shaft structure in the middle;

[0053] Figure 14 This is an exploded view of the shuttle frame assembly module of a sewing device in one embodiment of this application;

[0054] Figure 15 This is a schematic diagram of the engagement of the lower shaft and the tooth-lifting sliding shaft in one embodiment of this application;

[0055] Figure 16 for Figure 15 A schematic diagram of the tooth-lifting sliding shaft structure in the middle;

[0056] Figure 17 This is a schematic diagram of the lubricating medium channel in one embodiment of this application;

[0057] Figure 18 This is a schematic diagram of the lubrication medium channel from another perspective.

[0058] The component labels are as follows:

[0059] 100. Shuttle frame; 101. Rotary shuttle; 102. Needle plate; 1021. Clearance opening; 103. Tooth lifting slide shaft; 1031. Tooth lifting groove; 1032. Rotary shuttle gear; 104. Feed slide shaft; 105. Controllable section; 1051. Adjusting component; 1052. Tubing fitting; 1053. Oil line; 1054. Oil felt; 106. Nut seat; 1061. Threaded cavity; 1062. Threaded component; 1063. Drive belt; 1064. Speed ​​change gear;

[0060] 200. Feed dog; 201. Feed shaft; 202. Feed linkage mechanism; 2021. Feed cam; 2022. Feed rocker arm; 2023. Feed connecting rod; 2024. Feed main connecting rod; 2025. Feed secondary connecting rod; 2026. Switch; 203. Feed dog linkage mechanism; 2031. Lifting cam; 2032. Lifting connecting rod; 2033. Feed crank; 2034. Feed frame; 2035. Fine-tuning screw; 2036. Feed eccentric pin;

[0061] 300. Drive mechanism; 310. Fixed base; 320. Adjusting screw; 321. Positioning ring groove; 322. Radial bolt; 331. Drive motor; 332. Hand handle; 340. Guide screw;

[0062] 902, base; 9021, seam platform; 903, lower shaft. Detailed Implementation

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] To achieve position adjustment of two sets of shuttle carriage assembly modules, this application discloses a needle position adjustment device for sewing equipment, including shuttle carriage assembly modules for cooperating with the sewing machine needle, a lower shaft 903, and a drive mechanism 300. Two sets of shuttle carriage assembly modules are slidably mounted on the lower shaft 903, and the drive mechanism 300 drives the two sets of shuttle carriage assembly modules to adjust their positions along the lower shaft 903. The drive mechanism 300 employs a screw and nut pair to achieve precise position adjustment of the shuttle carriage assembly modules, meeting the cooperation requirements between the shuttle carriage assembly modules and the sewing machine needle.

[0069] The screw-nut pair can be implemented in various ways. For example, from the perspective of active / passive relationship, the screw-nut pair can be categorized as either screw-driven or nut-driven. Screw-driven specifically means the screw is linked to the power source and the nut moves relative to it; nut-driven specifically means the nut is linked to the power source and moves relative to the screw. Another example is from the perspective of the synchronization relationship between the two shuttle carriage assembly modules, which can be categorized as either a linked structure or an independent structure. An independent structure means the two shuttle carriage assembly modules move independently as they slide along the lower shaft 903; a linked structure means the two shuttle carriage assembly modules move synchronously in opposite directions as they slide along the lower shaft 903. This synchronous and opposite movement is achieved through mechanical constraints or control signals. These different classifications can be combined to form a variety of configurations, several of which will be illustrated below. Unless otherwise specified, "fixed configuration" in the following text should be understood as fixed to the sewing machine frame or fixed relative to the lower shaft.

[0070] In one embodiment, the lead screw and nut assembly is a lead screw-driven linkage structure. (See attached diagram.) Figure 1 To be continued Figure 2As shown, the drive mechanism 300 includes a fixed base 310 for mounting a lead screw, an adjusting lead screw 320 for providing the lead screw, and a drive component for driving the adjusting lead screw 320 to rotate. In this embodiment, the adjusting lead screw 320 is rotatably and axially positioned and fits into the fixed base 310. The fixed base 310 has a mounting hole through which the adjusting lead screw 320 rotates and is axially positioned. Each shuttle frame assembly module is fixedly mounted with a nut seat 106 that engages with the adjusting lead screw threadedly. There is one adjusting lead screw 320, and each shuttle frame assembly module engages with the same adjusting lead screw 320 through the corresponding nut seat 106 to achieve coordinated adjustment of each shuttle frame assembly module. The drive component is a drive motor 331 that is driven by the adjusting lead screw 320. The drive motor 331 is arranged parallel to the adjusting lead screw 320 and is connected to it via a drive belt 1063. When the adjusting screw 320 rotates, each shuttle carriage assembly module moves synchronously relative to the lower shaft 903. When the adjusting screw 320 stops rotating, the screw connection between the adjusting screw 320 and the nut seat 106 prevents the shuttle carriage assembly module from moving. The stopping of the shuttle carriage assembly module can be achieved by adjusting the thread engagement parameters of the adjusting screw 320 and the nut seat 106, such as unidirectional transmission; it can also be achieved by the anti-rotation torque of the drive motor 331 in a stationary state. The drive motor 331 can also be replaced with other drive sources, such as the hand handle 332, pneumatic components, magnetic components, etc.

[0071] In one embodiment, the lead screw and nut pair is an independent structure with the lead screw as the active component. Based on the previous embodiment, by dividing the adjusting lead screw 320 into multiple parts and setting them independently for each shuttle carriage assembly module, independent control of each shuttle carriage assembly module can be achieved. For example, multiple adjusting lead screws 320 are provided, and each shuttle carriage assembly module cooperates with a different adjusting lead screw 320 through a corresponding nut seat 106. Correspondingly, each adjusting lead screw 320 is also equipped with an independent drive component. (See attached figure) Figure 3 To be continued Figure 5 As shown, the driving component is a hand control handle 332 that is connected to the adjusting screw 320. A positioning ring groove 321 is located on the outer circumferential surface of the adjusting screw 320. A radial bolt 322 is provided on the fixed base 310, which cooperates with the positioning ring groove 321 to achieve axial positioning of the adjusting screw 320. The radial bolt 322 penetrates the side wall of the mounting hole and at least partially enters the positioning ring groove 321. When the adjusting screw 320 rotates under the drive of the hand control handle 332, the radial bolt 322 moves in the extending direction of the positioning ring groove 321. A threaded connector 1062 within the nut seat 106 cooperates with the adjusting screw 320 to drive the shuttle frame assembly module.

[0072] In one embodiment, the lead screw and nut pair is either an independent structure or a linked structure with the nut as the active component. (See attached diagram.) Figure 6 To be continued Figure 7As shown, the drive mechanism 300 includes a fixedly mounted guide screw 340 and a drive member for the transmission connection of the nut seat 106. The guide screw 340 is parallel to the extension direction of the lower shaft 903. A threaded connector 1062 is rotatably mounted inside the nut seat 106, and the threaded connector 1062 is in transmission engagement with the guide screw 340. The threaded connector 1062 is controlled by the drive member. The drive member can be a drive motor 331 and is independently configured for each nut seat 106. Further reference is given in the appendix. Figure 8 In the illustrated embodiment, the nut seat 106 is hollow to provide a threaded cavity 1061. The threaded cavity 1061 contains a threaded member 1062 that threads with the guide screw 340, and a transmission member that engages with the threaded member 1062. A drive member is mounted outside the nut seat 106 and drives the threaded member 1062 to rotate via the transmission member. The threaded member 1062 has meshing teeth on its outer periphery, and the transmission member is a speed-changing gear 1064 that meshes with the threaded member 1062. Further, the speed-changing gear 1064 is a reduction gear. The transmission member and the threaded member 1062 are constrained by the threaded cavity 1061 to achieve rotational positioning. The drive motor 331, the speed-changing gear 1064, and the threaded member 1062 constitute a reduction gear system to reduce the driving force and increase torque, improving control accuracy. Besides the drive motor 331, the drive member can also be replaced with other drive sources, such as a hand lever 332, pneumatic components, magnetic components, etc. In embodiments where each screw connector 1062 has an independently configured drive unit, each shuttle carriage assembly module can be adjusted independently or in conjunction with other components. For example, when the drive units are mechanically constrained or constrained by control signals, each shuttle carriage assembly module adjusts in conjunction with other components; when the drive units are decoupled to be controlled independently, each shuttle carriage assembly module adjusts independently. In the above different embodiments, the guide screw 340 can be one or multiple, without affecting the realization of independent or in conjunction adjustment of each shuttle carriage assembly module.

[0073] In this application, the shuttle frame assembly module of the needle position adjustment device needs to not only adjust its own position but also cooperate with the sewing machine needle to operate the sewing thread. Therefore, it also needs to maintain power transmission with the lower shaft 903 while adjusting the position. The following will refer to the appendix... Figure 1 and attached Figure 2 The illustrated shuttle frame assembly module demonstrates an exemplary unfolding and mating structure; other embodiments are similarly configured. (See attached diagram.) Figure 1 To be continued Figure 11 In the illustrated embodiment, the shuttle frame assembly module includes:

[0074] The shuttle frame 100 is installed on the lower shaft 903 and is slidably positioned along the lower shaft 903.

[0075] The rotary shuttle 101 is linked to the lower shaft 903 and is rotatably mounted on the shuttle frame 100.

[0076] Needle plate 102 is fixed to shuttle frame 100, and needle plate 102 is provided with clearance opening 1021;

[0077] The feed dog 200 is linked with the lower shaft 903, and the feed dog 200 is movably set at the clearance opening 1021;

[0078] During the sliding of the shuttle frame 100 along the lower shaft 903, the rotary shuttle 101, needle plate 102 and feed dog 200 all move synchronously with the axial movement of the shuttle frame 100 along the lower shaft 903.

[0079] In this embodiment, the shuttle frame 100, rotary hook 101, needle plate 102, and feed dog 200 form a basic adjustment unit that can move as a whole relative to the lower shaft 903 to achieve linkage adjustment. This eliminates the need to adjust each component in the shuttle frame assembly module separately, especially components that need to coordinate with the needle, thread, and fabric, and that need to adapt to changes in the needle spacing. The needle position is changed through the overall movement of the basic adjustment unit, effectively solving the cumbersome operation of changing needle positions and improving adjustment efficiency.

[0080] For specific configuration details of the shuttle frame assembly module, see attached. Figure 10 To be continued Figure 16 A preferred technical solution is provided as an example. For instance, the shuttle frame assembly module also includes a feed shaft 201, which is linked to and parallel to the lower shaft 903. The shuttle frame 100 is slidably sleeved on the feed shaft 201, meaning the shuttle frame 100 moves simultaneously along both the lower shaft 903 and the feed shaft 201 to adjust the position of the shuttle frame assembly module and the needle position. The lower shaft 903 and the feed shaft 201 are coupled and driven to the feed dog 200, whose motion control is at least influenced by the drives of the lower shaft 903 and the feed shaft 201. The lower shaft 903 and the feed shaft 201 can be configured with independent drive sources or can be linked together. When linked together, the rotation of the lower shaft 903 can achieve the preset movement of the feed shaft 201. (See attached diagram.) Figure 2 In the illustrated embodiment, the shuttle frame assembly module further includes a fabric feeding linkage mechanism 202. The fabric feeding linkage mechanism 202 includes a fabric feeding cam 2021 that rotates with the lower shaft 903, a fabric feeding rocker arm 2022 that rotates with the fabric feeding shaft 201, and a fabric feeding connecting rod 2023 linked between the fabric feeding cam 2021 and the fabric feeding rocker arm 2022. In this embodiment, the rotation of the lower shaft 903 enables the reciprocating oscillation of the fabric feeding shaft 201. The fabric feeding connecting rod 2023 can be a single component or a group of rods comprising multiple interconnected components. For example, in the attached... Figure 9In the illustrated embodiment, the feed link 2023 specifically includes a large feed link 2024 that cooperates with the feed cam 2021, a small feed link 2025 that is hinged to both the large feed link 2024 and the feed rocker arm 2022, and a switch 2026 for controlling the movement posture of the feed link 2023. The two ends of the switch 2026 are connected to the base 902 for providing the sewing table 9021, and the middle part cooperates with the hinge shaft between the large feed link 2024 and the small feed link 2025. The switch 2026 controls the movement posture of the feed link 2023 by controlling the movement of the hinge shaft between the large feed link 2024 and the small feed link 2025, thereby achieving precise linkage between the lower shaft 903 and the feed shaft 201.

[0081] The shuttle frame 100 needs to achieve stable power transmission while moving relative to the lower shaft 903 and the feed shaft 201. (See attached reference.) Figure 12 To be continued Figure 16 In the illustrated embodiment, the shuttle frame assembly module further includes a lifting tooth slide shaft 103, which is rotatably mounted on the shuttle frame 100. The lifting tooth slide shaft 103 is slidably positioned and sleeved on the lower shaft 903, rotating synchronously with it. The rotation of the lifting tooth slide shaft 103 also transmits power to the rotary hook 101. The lifting tooth slide shaft 103 simultaneously drives both the rotary hook 101 and the feed dog 200. A rotary hook gear 1032, which is connected to the rotary hook 101, is fixed on the lifting tooth slide shaft 103. The lifting tooth slide shaft 103 drives the rotary hook 101 as it rotates with the lower shaft 903. In this embodiment, the lifting tooth slide shaft 103 is a cylindrical structure sleeved on the lower shaft 903, and a keyway fit exists between the lifting tooth slide shaft 103 and the lower shaft 903. Specifically, the inner circumferential surface of the tooth-lifting slide shaft 103 is provided with a tooth-lifting groove 1031 extending axially. The lower shaft 903 is provided with a tooth-lifting key that mates with the tooth-lifting groove 1031. The extension length of the tooth-lifting groove 1031 is greater than the extension length of the tooth-lifting key to allow the tooth-lifting slide shaft 103 to slide freely axially on the lower shaft 903 while maintaining a radial connection. The tooth-lifting slide shaft 103 is provided with a flange bearing. The tooth-lifting slide shaft 103 and the flange bearing are interference-fitted for mutual positioning. When the tooth-lifting slide shaft 103 moves, it can drive the parts fixed on the tooth-lifting slide shaft 103 (such as the shuttle frame 100 mentioned above) to move together. (See attached diagram) Figure 16As shown, the tooth-lifting slide shaft 103 adopts a stepped design. The inner hole of the tooth-lifting slide shaft 103 includes a contact section and an edge section that mate with the lower shaft 903 and / or the tooth-lifting key. The contact section has a clearance fit with the lower shaft 903 and / or the tooth-lifting key, and the inner diameter of the edge section is smaller than that of the contact section. For example, the inner diameter of the edge section is 50% to 90% of the inner diameter of the contact section. This design can prevent deformation of the tooth-lifting slide shaft 103 caused by other components (such as the tooth-lifting cam 2031 mentioned below) locking onto it, thus preventing axial movement jamming due to locking deformation and improving the smoothness of movement. To facilitate the mating of the tooth-lifting slide shaft 103 with other components, the outer circumferential surface of the tooth-lifting slide shaft 103 is stepped, corresponding to the stepped design of the inner hole.

[0082] Reference Appendix Figure 12 To be continued Figure 16 In the illustrated embodiment, the shuttle frame assembly module further includes a feed slide shaft 104, which is rotatably mounted on the shuttle frame 100. The feed slide shaft 104 is slidably positioned and sleeved on the feed shaft 201, rotating synchronously with the feed shaft 201. In this embodiment, the feed slide shaft 104 is a cylindrical structure sleeved on the feed shaft 201, and there is a keyway fit between the feed slide shaft 104 and the feed shaft 201. The feed slide shaft 104 is cylindrical in shape, and its inner hole adopts a stepped section design. The inner hole of the feed slide shaft 104 includes an edge section and a contact section that fits with the feed key on the feed shaft 201 and / or the corresponding feed key on the feed shaft 201. The contact section has a clearance fit with the feed shaft 201 and / or the feed key, and the inner diameter of the edge section is smaller than the inner diameter of the contact section. The outer circumferential surface of the feed slide shaft 104 is smooth.

[0083] Reference Appendix Figure 11 Appendix Figure 14 In the illustrated embodiment, the rotational coupling of the lifting slide shaft 103 and the feeding slide shaft 104 transmits power to the feeding tooth 200, meaning the movement of the feeding tooth 200 is controlled by the linkage of the lifting slide shaft 103 and the feeding slide shaft 104. Specifically, the shuttle frame assembly module further includes a feeding tooth linkage mechanism 203. This mechanism includes a lifting cam 2031 that rotates with the lifting slide shaft 103, a lifting connecting rod 2032 driven by the lifting cam 2031, a feeding crank 2033 that rotates with the feeding slide shaft 104, and a feeding frame 2034 hinged at both ends to the lifting connecting rod 2032 and the feeding crank 2033, respectively. The feeding tooth 200 is mounted on the feeding frame 2034. Through the feeding tooth linkage mechanism 203, the movements of the lifting slide shaft 103 and the feeding slide shaft 104 can be coupled to the desired movements of the feeding frame 2034 and the feeding tooth 200.

[0084] The specific assembly relationship is as follows: The tooth-lifting cam 2031 is fixed on the tooth-lifting slide shaft 103, and the tooth-lifting slide shaft 103 is fitted with a tooth-lifting connecting rod 2032. The tooth-lifting cam 2031 is fixed with a cover plate to prevent the tooth-lifting connecting rod 2032 from moving axially. The other end of the tooth-lifting connecting rod 2032 is hinged to the feed frame 2034 through a shaft screw. The feed tooth 200 is fixed to the feed frame 2034 by screws. There are two fine-adjustment screws 2035 at the bottom of the feed tooth 200. By adjusting the height of the fine-adjustment screws 2035, the spatial posture of the feed tooth 200 relative to the feed frame 2034 can be adjusted, such as adjusting the tilt of the feed tooth 200. The feeding crank 2033 is fixed to the feeding slide shaft 104 by screws. The other end of the feeding crank 2033 is hinged to the feeding frame 2034 by the feeding eccentric pin 2036. The feeding eccentric pin 2036 is fixed to the feeding crank 2033 by set screws. The height and forward / backward position of the feeding teeth 200 can be adjusted by rotating the feeding eccentric pin 2036. When the lifting slide shaft 103 rotates, the lifting cam 2031 will also rotate. The lifting connecting rod 2032 drives the feeding frame 2034 to move up and down. The swing of the feeding slide shaft 104 will drive the feeding crank 2033 to swing, thereby driving the feeding table to move back and forth.

[0085] The feed frame 2034 is a single-piece structure. Specifically, the feed frame 2034 is herringbone shaped and has a first arm extending toward the feed slide shaft 104 and a second arm extending toward the lifting tooth slide shaft 103. The first arm extends horizontally, and the second arm extends vertically. The second arm is connected to the middle of the first arm, and the two ends of the first arm are connected to the feed tooth 200 and the feed crank 2033, respectively.

[0086] When the shuttle frame 100, rotary shuttle 101, needle plate 102, and feed dog 200 form a basic adjustment unit that can move relative to the lower shaft 903 and feed shaft 201, the original lubrication medium delivery can also be optimized in a coordinated manner. (See attached reference.) Figure 17 and attached Figure 18In the illustrated embodiment, a rotating engagement portion exists between the shuttle frame 100 and the rotary shuttle 101. A channel for supplying lubricating medium to the rotating engagement portion is provided within the shuttle frame 100, a portion of which is a controllable section 105. An adjusting member 1051 is movably mounted on the shuttle frame 100, acting on the controllable section 105 to change the lubricating medium supply. Further, a deformable tube 1052 is installed within the controllable section 105, with both ends of the tube 1052 sealed and connected to the channel. An oil line 1053 passes through the channel. Under the action of the adjusting member 1051, the tube 1052 deforms and compresses the oil line 1053. The adjusting member 1051 is an adjusting screw screwed to the shuttle frame 100, having a control end exposed to the outside and an adjusting end acting on the controllable section 105. A compression head for compressing the tube 1052 and / or the oil line 1053 is provided on the adjusting end. The compression head is movably mounted on the adjusting end. The extrusion head has a spherical extrusion portion that mates with the tube 1052. An oil felt 1054, which mates with the oil line 1053, is provided inside the shuttle 100. The oil felt 1054 absorbs and stores the lubricating medium transmitted by the oil line 1053 and further conveys it to other components on the shuttle 100. The transmission of lubricating medium within the shuttle 100 can also be achieved via the oil line 1053.

[0087] In the technical solution of this application, the shuttle frame 100, rotary hook 101, needle plate 102, feed dog 200, feed shaft 201, and lower shaft 903 are disassembled, allowing the above components to be combined into a complete and relatively independent shuttle frame assembly module, which can move freely. Driven by the drive mechanism 300, the positions of each shuttle frame assembly module can be adjusted independently or in conjunction, while simultaneously moving the bobbin, feed dog 200, and needle plate 102 to ensure that the relative distance between the rotary hook 101 and feed dog 200 remains constant. Before and after changing the needle position, the synchronization of the gear rotary hook 101 and the gap between the rotary hook 101 and feed dog 200 do not need to be adjusted, avoiding the complex adjustment steps previously required for changing the needle position, such as loosening gears, moving the shuttle frame 100, and adjusting the rotary hook 101, thus greatly improving convenience.

[0088] In conjunction with the foregoing, one embodiment of this application also discloses a sewing device for a double-needle machine, including the needle position adjustment device described above. The needle position adjustment device can be implemented individually or in combination with the embodiments described above, and other parts of the sewing device can be implemented in conjunction with existing technology, which will not be elaborated upon here.

[0089] The technical solution in this application includes at least the following technical advantages:

[0090] 1. Automatic needle position adjustment for improved ease of operation: The drive mechanism controls the movement of the rotary hook module, including the shuttle frame and feed dog. Users only need to select the desired needle position on the control system, eliminating the need for manual adjustment by loosening screws. This overcomes the technical shortcomings of traditional adjustment methods that rely on manual operation and introduce errors, achieving automatic and precise adjustment, thus improving operational convenience and sewing quality.

[0091] 2. Independent control of the feed dog and shuttle frame reduces the impact on the rotary hook: In traditional double-needle sewing machines, adjusting the stitch length requires readjusting the rotary hook position, which may affect the sewing effect. In this application, the adjustment of the feed dog does not affect the cooperation with the rotary hook, allowing the feed dog adjustment to avoid additional adjustments to the rotary hook position, ensuring the stability of the cooperation between the rotary hook and the needle, and improving the reliability of the equipment.

[0092] 3. Optimized structure and reduced maintenance costs: The rotary hook module in this application adopts a sealed grease-lubricated structure, with the gear parts internally filled with grease, eliminating the need for frequent lubrication and thus reducing maintenance requirements. Furthermore, the rotary hook lubrication system employs adjustable oil delivery technology to precisely control the amount of lubricating oil, preventing wear or skipping of the rotary hook due to insufficient lubrication, thereby extending the equipment's service life and reducing maintenance costs.

[0093] 4. Enhanced intelligence and reduced operational barriers: Traditional adjustment methods require experienced technicians for precise operation, while the technical solution of this application enables intelligent adjustment, allowing ordinary operators to easily complete the settings. This not only reduces reliance on skilled workers but also increases the equipment's accessibility, enabling it to adapt to the needs of more diverse garment processes and enhancing market competitiveness.

[0094] 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.

[0095] 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 sewing equipment, characterized in that, include: Shuttle frame assembly module, wherein there are two sets of shuttle frame assembly modules, each used to cooperate with the needle of the sewing equipment; The two sets of shuttle frame assembly modules are slidably mounted on the lower shaft; The drive mechanism uses a lead screw and nut pair to drive the two sets of shuttle frame assembly modules to adjust their positions along the lower shaft.

2. The needle position adjustment device for sewing equipment according to claim 1, characterized in that, During the sliding process of the two sets of shuttle frame assembly modules along the lower axis, they move synchronously in opposite directions or move independently. The synchronous in opposite directions are constrained by mechanical structures or by control signals.

3. The needle position adjustment device for sewing equipment according to claim 1, characterized in that, The drive mechanism includes: A guide screw is fixedly installed and parallel to the extension direction of the lower shaft. A nut seat that is rotatably installed in the shuttle frame assembly module is engaged with the guide screw. A drive unit, which is a motor and / or a hand handle, is connected to a nut seat in each of the shuttle assembly modules.

4. The needle position adjustment device for sewing equipment according to claim 3, characterized in that, The nut seat is hollow to provide a threaded cavity. The threaded cavity is provided with a threaded member that engages with the guide screw and a transmission member that engages with the threaded member. The driving member is installed outside the nut seat and drives the threaded member to rotate through the transmission member.

5. The needle position adjustment device for sewing equipment according to claim 1, characterized in that, The drive mechanism includes: The fixing base has mounting holes; The adjusting screw rotates and is axially positioned through the mounting hole, and each shuttle frame assembly module is fixedly installed with a nut seat that is threadedly engaged with the adjusting screw; A driving component, which is a motor and / or a hand lever, is connected to an adjusting screw drive.

6. The needle position adjustment device for sewing equipment according to claim 5, characterized in that, The adjusting screw is provided, and each shuttle frame assembly module cooperates with the same adjusting screw through a corresponding nut seat; or The system has multiple adjusting screws, and each shuttle frame assembly module is connected to a different adjusting screw through a corresponding nut seat.

7. The needle position adjustment device for sewing equipment according to claim 1, characterized in that, The shuttle frame assembly module includes: The shuttle frame is slidably fitted along the lower shaft, and the shuttle frame is threadedly fitted with the corresponding drive mechanism. The feed dog is installed on the shuttle frame and is connected to the lower shaft. As the shuttle frame slides along the lower shaft, the feed dog moves synchronously with the shuttle frame. A rotary shuttle is rotatably mounted on the shuttle frame and connected to the lower shaft. As the shuttle frame slides along the lower shaft, the rotary shuttle moves synchronously with the shuttle frame. A needle plate is fixed to the shuttle frame, and the needle plate has an clearance opening. The feed dog is movably disposed in the clearance opening.

8. The needle position adjustment device for sewing equipment according to claim 7, characterized in that, The needle position adjustment device further includes: A fabric feeding shaft, the lower shaft is connected to and arranged parallel to the lower shaft, and each set of shuttle frame assembly modules is respectively sleeved on the fabric feeding shaft; The shuttle frame assembly module also includes: The tooth-lifting slide shaft is rotatably mounted on the shuttle frame, and the tooth-lifting slide shaft is slidably positioned and sleeved on the lower shaft and rotates synchronously with the lower shaft; A feeding slide shaft is rotatably mounted on the shuttle frame. The feeding slide shaft is slidably positioned on the feeding shaft and rotates synchronously with the feeding shaft. The rotation of the lifting tooth slide shaft is transmitted to the rotary hook, and the rotation of the lifting tooth slide shaft and the feeding slide shaft are coupled to the feeding tooth.

9. The needle position adjustment device for sewing equipment according to claim 8, characterized in that, The needle position adjustment device further includes: The feed dog linkage mechanism includes a feed dog cam that rotates with the feed dog sliding shaft, a feed dog connecting rod driven by the feed dog cam, a feed dog crank that rotates with the feed dog sliding shaft, and a feed dog frame that is hinged at both ends to the feed dog connecting rod and the feed dog crank, respectively. The feed dog is mounted on the feed dog frame.

10. A double-needle 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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