Sewing machine needle linkage mechanism, machine head device and sewing machine

Abstract

The utility model relates to a sewing machine needle linkage mechanism, a machine head device and a sewing machine, the sewing machine needle linkage mechanism comprises a motor assembly, the motor assembly comprises a double-shaft motor, and the double-shaft motor comprises a first driving shaft and a second driving shaft; the machine needle assembly is matched with a first driving shaft of the double-shaft motor; and the presser foot assembly is matched with the second driving shaft of the double-shaft motor. According to the technical scheme, the problems that in the prior art, when the positions of the machine needle and the presser foot are adjusted, time and labor are wasted, and efficiency is low are effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of sewing machines, and in particular to a sewing machine needle linkage mechanism, a head device and a sewing machine. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing material are interwoven or sewn together.

[0003] Sewing machines primarily rely on the coordinated operation of a needle, presser foot, and rotary hook. Switching between different materials requires manual adjustment, such as switching from thin to thick material. This requires raising the presser foot and needle. Existing systems require manual adjustment or disassembly to raise the needle mounting position, requiring repeated adjustments to achieve the proper position. This structure makes changing the needle and presser foot positions time-consuming and labor-intensive, resulting in low efficiency. Utility Model Content

[0004] The present application provides a sewing machine needle linkage mechanism, a head device and a sewing machine to solve the problem in the prior art that the sewing machine is time-consuming, labor-intensive and inefficient in adjusting the position of the needle and presser foot.

[0005] According to the present application, a sewing machine needle linkage mechanism is provided, including: a motor assembly, the motor assembly includes a dual-axis motor, the dual-axis motor includes a first drive shaft and a second drive shaft; a needle assembly, the needle assembly cooperates with the first drive shaft of the dual-axis motor; and a presser foot assembly, the presser foot assembly cooperates with the second drive shaft of the dual-axis motor.

[0006] Furthermore, the motor assembly includes a first gear, the needle assembly includes a second gear, a needle transmission structure, a needle bar structure and a needle bar sleeve, the first gear is installed on the first drive shaft, the second gear is installed on the needle transmission structure, the first gear and the second gear are meshed, the needle transmission structure cooperates with the needle bar structure, and the needle bar structure is movably installed in the needle bar sleeve.

[0007] Furthermore, the first gear and the second gear are both bevel gears.

[0008] Furthermore, the needle transmission structure includes a needle transmission rod, a third gear and a fourth gear. The second gear and the third gear are both installed on the needle transmission rod, the fourth gear is installed on the needle rod structure, and the third gear and the fourth gear are meshed with each other.

[0009] Furthermore, the needle bar structure includes a threaded rod and a needle seat, the needle bar sleeve has an internal thread, the external thread of the threaded rod is adapted to the internal thread of the needle bar sleeve, and the lower end of the threaded rod cooperates with the needle seat.

[0010] Furthermore, the outer contour of the needle seat is non-circular, and the needle seat includes a seat body and a cover plate, which are detachably connected. There is a threaded rod accommodating space and a mounting through hole between the seat body and the cover plate. The mounting through hole passes through the upper end of the needle seat and the threaded rod accommodating space. The threaded rod includes a threaded section, a reduced diameter section and a driving disc from top to bottom. The reduced diameter section is located in the mounting through hole, and the driving disc is located in the threaded rod accommodating space.

[0011] Further, the first driving shaft is located inside the second driving shaft.

[0012] Furthermore, the presser foot assembly includes a presser foot, a presser foot transmission structure and a rack, and the motor assembly also includes a fifth gear, which is engaged with the rack. The rack is connected to the presser foot transmission structure and cooperates with the sewing machine housing to be movable up and down.

[0013] Furthermore, the presser foot transmission structure includes a transmission block, a presser foot rod and a spring. The upper end of the presser foot rod is connected to the transmission block, the presser foot is connected to the lower end of the presser foot rod, the spring is pressed between the transmission block and the sewing machine housing, and the rack is connected to the transmission block.

[0014] According to another aspect of the present application, a machine head device is also provided, which includes a needle drive motor assembly, a crankshaft assembly and a sewing needle linkage mechanism. The needle drive motor assembly is connected to the needle assembly of the sewing needle linkage mechanism through the crankshaft assembly, and the sewing needle linkage mechanism is the above-mentioned sewing needle linkage mechanism.

[0015] According to another aspect of the present application, a sewing machine is further provided, which includes a sewing machine body and a sewing machine needle linkage mechanism, and the sewing machine needle linkage mechanism is the sewing machine needle linkage mechanism mentioned above.

[0016] By applying the technical solution of the present application, the first drive shaft of the dual-axis motor cooperates with the needle assembly, and the second drive shaft cooperates with the presser foot assembly. In this way, the dual-axis motor can be used to drive the needle assembly to be raised or lowered, and the dual-axis motor can also be used to drive the presser foot assembly to be raised or lowered. Driving the needle assembly and the presser foot assembly by a motor saves time and effort, and is more efficient. In addition, the provision of the dual-axis motor saves space compared to the structure in which the motors are separately provided for the needle assembly and the presser foot assembly. The technical solution of the present application effectively solves the problem in the prior art that the sewing machine is time-consuming and labor-intensive, and has low efficiency, in adjusting the position of the needle and presser foot. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a sewing machine needle linkage mechanism according to an embodiment of the present application is shown;

[0020] Figure 2 Shown Figure 1 Schematic diagram of a threaded rod of a sewing machine needle linkage mechanism;

[0021] Figure 3 Shown Figure 1 Exploded diagram of the needle seat of the sewing machine needle linkage mechanism.

[0022] The above drawings include the following reference numerals:

[0023] 10. Motor assembly; 11. First gear; 12. Fifth gear; 20. Needle assembly; 21. Second gear; 22. Needle transmission structure; 23. Needle bar structure; 231. Threaded rod; 232. Needle seat; 24. Needle bar sleeve; 30. Presser foot assembly; 31. Presser foot; 32. Presser foot transmission structure. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0026] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0027] like Figures 1 to 3 As shown, the sewing machine needle linkage mechanism of this embodiment includes: a motor assembly 10, a needle assembly 20, and a presser foot assembly 30. The motor assembly 10 includes a dual-axis motor, which includes a first drive shaft and a second drive shaft. The needle assembly 20 cooperates with the first drive shaft of the dual-axis motor. The presser foot assembly 30 cooperates with the second drive shaft of the dual-axis motor.

[0028] By applying the technical solution of this embodiment, the first drive shaft of the dual-axis motor cooperates with the needle assembly 20, and the second drive shaft cooperates with the presser foot assembly 30. In this way, the dual-axis motor can be used to drive the needle assembly 20 to be raised or lowered, and the dual-axis motor can also be used to drive the presser foot assembly 30 to be raised or lowered. By driving the needle assembly 20 and the presser foot assembly 30 by a motor, time and labor are saved, and efficiency is high. In addition, by setting up the dual-axis motor, space is saved compared to the structure in which the needle assembly 20 and the presser foot assembly 30 are provided with motors separately. The technical solution of this embodiment effectively solves the problem in the prior art that the sewing machine is time-consuming and labor-intensive, and has low efficiency, in adjusting the position of the needle and presser foot.

[0029] like Figure 1 As shown, in the technical solution of this embodiment, the motor assembly 10 includes a first gear 11, the needle assembly 20 includes a second gear 21, a needle transmission structure 22, a needle bar structure 23 and a needle bar sleeve 24, the first gear 11 is installed on the first drive shaft, the second gear 21 is installed on the needle transmission structure 22, the first gear 11 and the second gear 21 are meshed, the needle transmission structure 22 cooperates with the needle bar structure 23, and the needle bar structure 23 is movably installed in the needle bar sleeve 24. The transmission method through the first gear 11 and the second gear 21 is relatively stable and the transmission accuracy is high. The cooperation between the needle bar structure 23 and the needle bar sleeve 24 allows the rotation to be converted into the up and down translation of the needle. The above structure is compact and the transmission effect is good.

[0030] like Figure 1 As shown, in the technical solution of this embodiment, the first gear 11 and the second gear 21 are both bevel gears. This structural arrangement is more convenient and flexible. In this embodiment, the rotating shaft of the dual-axis motor is arranged horizontally, and the needle drive rod is arranged vertically. The first gear 11 and the second gear 21 can be fixed using fasteners such as screws, or other methods such as interference fit, which will not be further described here.

[0031] like Figure 1 As shown, in the technical solution of this embodiment, the needle transmission structure 22 includes a needle transmission rod, a third gear and a fourth gear. The second gear 21 and the third gear are both mounted on the needle transmission rod, and the fourth gear is mounted on the needle rod structure 23. The third gear and the fourth gear are meshed with each other. The above structure is compact, with high transmission accuracy and smooth transmission. It should be noted that the third gear and the fourth gear can also be matched through a transmission gear, and the transmission of the above-mentioned third gear and fourth gear can also be a chain drive, or a toothed belt drive.

[0032] like Figure 1 As shown, in the technical solution of this embodiment, the needle bar structure 23 comprises a threaded rod 231 and a needle holder 232. The needle bar sleeve 24 has internal threads. The external threads of the threaded rod mate with the internal threads of the needle bar sleeve 24, and the lower end of the threaded rod engages with the needle holder. The needle bar sleeve 24 is connected to the crankshaft assembly via fasteners. The rotation between the threaded rod and the needle bar sleeve 24 is converted into the up and down movement of the threaded rod. This structure also allows the pitch of the threaded rod's threads to be adjusted as needed to adjust the movement accuracy of the needle.

[0033] like Figure 1 As shown, in the technical solution of this embodiment, the outer contour of the needle seat is non-circular, and the needle seat includes a seat body and a cover plate. The seat body and the cover plate are detachably connected, and a threaded rod accommodating space and a mounting through hole are provided between the seat body and the cover plate. The mounting through hole passes through the upper end of the needle seat and the threaded rod accommodating space. The threaded rod includes a threaded section, a reduced diameter section and a driving disc from top to bottom. The reduced diameter section is located in the mounting through hole, and the driving disc is located in the threaded rod accommodating space. It should be noted that the outer contour of the needle seat can be square, oval, or other irregular shapes. The lower end of the needle bar sleeve 24 is compatible with the needle seat, as long as the needle seat can move up and down along the needle bar sleeve 24 without rotating relative to it. The threaded rod accommodating space is also disc-shaped. The threaded rod can rotate relative to the needle seat without moving up and down relative to it. The threaded rod can drive the needle seat to move up and down.

[0034] like Figure 1As shown, in the technical solution of this embodiment, the first drive shaft is located inside the second drive shaft. In this way, the first drive shaft and the second drive shaft do not interfere with each other when working. It should be noted that the second drive shaft is a hollow shaft, the first drive shaft passes through the second drive shaft, and the outer end of the first drive shaft is farther away from the motor body than the outer end of the second drive shaft. The above structure is related to the structure between the needle assembly 20 and the presser foot assembly 30. According to the structure and positional relationship of the first drive shaft and the second drive shaft, as well as the working conditions of the needle assembly 20 and the presser foot assembly 30, appropriate structural configuration is performed to make the above structure more compact, occupy less space, and do not interfere with each other.

[0035] like Figure 1 As shown, in the technical solution of this embodiment, the presser foot assembly 30 includes a presser foot 31, a presser foot transmission structure 32 and a rack. The motor assembly 10 also includes a fifth gear 12, which is engaged with the rack. The rack is connected to the presser foot transmission structure 32 and is matched with the sewing machine housing to be movable up and down. The above structure has a stable transmission and is convenient for control. The upper part of the rack has a limiting section, and the upper part of the sewing machine housing has a through hole that is compatible with the limiting section. The limiting section of the rack can only move up and down in the through hole. The through hole forms a constraint on the other directions of the rack, so that the rack is more stable when moving.

[0036] like Figure 1 As shown, in the technical scheme of the present embodiment, the presser foot transmission structure 32 includes a transmission block, a presser foot rod and a spring. The upper end of the presser foot rod is connected to the transmission block, and the presser foot 31 is connected to the lower end of the presser foot rod. The spring is pressed between the transmission block and the sewing machine housing, and the rack is connected to the transmission block. The up and down movement of the rack drives the up and down movement of the transmission block. Under the combined constraints of the spring, the rack, the presser foot rod and the sewing machine housing, the transmission block has a high operating precision and runs smoothly. In order to adapt to the conditions of different fabrics, the needle can be first lifted under the action of the motor assembly 10. After the presser foot 31 is pressed into place, the needle returns to its position under the action of the motor assembly 10. The position where the needle returns to is convenient for cooperation with the rotary shuttle.

[0037] According to another aspect of the present application, a machine head device is also provided, which includes a needle drive motor assembly, a crankshaft assembly and a sewing needle linkage mechanism. The needle drive motor assembly is connected to the needle assembly 20 of the sewing needle linkage mechanism through the crankshaft assembly. The sewing needle linkage mechanism is the above-mentioned sewing needle linkage mechanism.

[0038] According to another aspect of the present application, a sewing machine is further provided, which includes a sewing machine body and a sewing machine needle linkage mechanism, and the sewing machine needle linkage mechanism is the sewing machine needle linkage mechanism mentioned above.

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0041] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A sewing machine needle linkage mechanism, characterized in that: include: A motor assembly (10), the motor assembly (10) comprising a dual-shaft motor, the dual-shaft motor comprising a first drive shaft and a second drive shaft; A needle assembly (20), the needle assembly (20) being matched with the first drive shaft of the dual-shaft motor; A presser foot assembly (30), the presser foot assembly (30) being matched with the second drive shaft of the dual-shaft motor; The second drive shaft is a hollow shaft, the first drive shaft is located inside the second drive shaft, the first drive shaft passes through the second drive shaft, and the outer end of the first drive shaft is farther away from the motor body than the outer end of the second drive shaft; the motor assembly (10) includes a first gear (11), the needle assembly (20) includes a second gear (21), a needle transmission structure (22), a needle bar structure (23) and a needle bar sleeve (24), the first gear (11) is mounted on the first drive shaft, the second gear (21) is mounted on the needle transmission structure (22), the first gear (11) and the second gear (21) are meshed with each other, the needle transmission structure (22) cooperates with the needle bar structure (23), and the needle bar structure (23) is movably mounted in the needle bar sleeve (24); The first gear (11) and the second gear (21) are both bevel gears.

2. The sewing machine needle linkage mechanism according to claim 1, characterized in that: The needle transmission structure (22) includes a needle transmission rod, a third gear and a fourth gear, the second gear (21) and the third gear are both mounted on the needle transmission rod, the fourth gear is mounted on the needle rod structure (23), and the third gear and the fourth gear are meshed with each other.

3. The sewing machine needle linkage mechanism according to claim 2, characterized in that: The needle bar structure (23) includes a threaded rod (231) and a needle seat (232), the needle bar sleeve (24) has an internal thread, the external thread of the threaded rod is adapted to the internal thread of the needle bar sleeve (24), and the lower end of the threaded rod is matched with the needle seat.

4. The sewing machine needle linkage mechanism according to claim 3, characterized in that: The outer contour of the needle seat is non-circular. The needle seat includes a seat body and a cover plate. The seat body and the cover plate are detachably connected. A threaded rod accommodating space and a mounting through hole are provided between the seat body and the cover plate. The mounting through hole passes through the upper end of the needle seat and the threaded rod accommodating space. The threaded rod includes a threaded section, a reduced diameter section and a driving disc from top to bottom. The reduced diameter section is located in the mounting through hole, and the driving disc is located in the threaded rod accommodating space.

5. The sewing machine needle linkage mechanism according to claim 1, characterized in that: The first drive shaft is located inside the second drive shaft.

6. The sewing machine needle linkage mechanism according to any one of claims 1 to 5, characterized in that: The presser foot assembly (30) includes a presser foot (31), a presser foot transmission structure (32) and a rack. The motor assembly (10) further includes a fifth gear (12). The fifth gear (12) is meshed with the rack. The rack is connected to the presser foot transmission structure (32) and is matched with the sewing machine housing so as to be movable up and down.

7. The sewing machine needle linkage mechanism according to claim 6, characterized in that: The presser foot transmission structure (32) includes a transmission block, a presser foot rod and a spring. The upper end of the presser foot rod is connected to the transmission block, the presser foot (31) is connected to the lower end of the presser foot rod, the spring is pressed between the transmission block and the sewing machine housing, and the rack is connected to the transmission block.

8. A head device, characterized in that: The machine head device includes a needle drive motor assembly, a crankshaft assembly and a sewing needle linkage mechanism. The needle drive motor assembly is connected to the needle assembly (20) of the sewing needle linkage mechanism through the crankshaft assembly. The sewing needle linkage mechanism is the sewing needle linkage mechanism described in any one of claims 1 to 7.

9. A sewing machine, characterized in that: The sewing machine includes a sewing machine body and a sewing machine needle linkage mechanism, and the sewing machine needle linkage mechanism is the sewing machine needle linkage mechanism according to any one of claims 1 to 7.

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