Sewing machine needle bar assembly and sewing machine

Abstract

The utility model relates to a sewing machine needle bar assembly and a sewing machine, and the sewing machine needle bar assembly comprises a connecting structure which is matched with a crankshaft assembly of the sewing machine; the machine needle fixing structure is movably matched with the connecting structure, and the first end of the machine needle fixing structure is matched with the machine needle; the transmission structure is matched with the second end of the machine needle fixing structure; and the output end of the driving structure is matched with the transmission structure. According to the technical scheme, the problem that time and labor are wasted when the needle position of a sewing machine is adjusted in the prior art is 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 bar assembly 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] The sewing work of the sewing machine is mainly completed by the machine needle. In some prior arts, the machine needle is detachably mounted on the needle bar assembly, and different types of machine needles can be replaced according to different sewing objects. For different types of machine needles, the upper and lower heights need to be adjusted by removing the top screw, and the adjustment of the machine needle requires repeated debugging, so it is necessary to repeatedly disassemble and install the top screw to adjust the position of the machine needle. The above-mentioned machine needle adjustment is time-consuming and labor-intensive. Utility Model Content

[0004] The present application provides a sewing machine needle bar assembly and a sewing machine, so as to solve the problem that it is time-consuming and labor-intensive to adjust the needle position of the sewing machine in the prior art.

[0005] According to the present application, a sewing machine needle rod assembly is provided, including: a connecting structure, the connecting structure cooperates with the crankshaft assembly of the sewing machine; a needle fixing structure, the needle fixing structure is movably matched with the connecting structure, and the first end of the needle fixing structure cooperates with the needle; a transmission structure, the transmission structure cooperates with the second end of the needle fixing structure; and a driving structure, the output end of the driving structure cooperates with the transmission structure.

[0006] Furthermore, the transmission structure includes a transmission rod, and the needle fixing structure includes a threaded rod, and the threaded rod is movably matched with the first end of the transmission rod through a thread.

[0007] Furthermore, the first end of the transmission rod is a hollow structure with an internal thread, the first end of the threaded rod cooperates with the machine needle, and the second end of the threaded rod has an external thread that matches the internal thread; or the first end of the threaded rod cooperates with the machine needle, the second end of the threaded rod is a hollow structure with an internal thread, and the first end of the transmission rod has an external thread that matches the internal thread of the second end of the threaded rod.

[0008] Furthermore, the second end of the transmission rod has a hollow structure, and the output end of the driving structure is at least partially located in the second end of the transmission rod.

[0009] Further, the driving structure includes a driving motor and a driving shaft, the driving motor is connected to the driving shaft, and when the cross-sectional area of ​​the hollow structure at the second end of the transmission rod is circular, the driving shaft is connected to the second end of the transmission rod through a fastener; or when the cross-sectional area of ​​the hollow structure at the second end of the transmission rod is non-circular, the cross-sectional area of ​​the first end of the driving shaft is adapted to the hollow structure at the second end of the transmission rod, and the first end of the driving shaft extends into the hollow structure at the second end of the transmission rod.

[0010] Further, the connection structure includes a hollow rod, the length of the threaded rod is greater than the length of the hollow rod, and the threaded rod passes through the hollow rod.

[0011] Furthermore, the machine needle is detachably connected to the first end of the threaded rod.

[0012] Furthermore, the first end of the threaded rod has a needle mounting hole extending axially, and the side wall of the first end of the threaded rod has a top screw hole, which is connected to the needle mounting hole, and the needle is installed in the needle mounting hole.

[0013] According to another aspect of the present application, a sewing machine is provided, which includes a sewing machine body and a needle bar assembly. The needle bar assembly cooperates with the sewing machine body, and the needle bar assembly is the above-mentioned needle bar assembly.

[0014] Furthermore, the sewing machine also includes a control assembly, the sewing machine body includes a fuselage and a crankshaft assembly, the crankshaft assembly is installed on the fuselage, the control assembly is arranged on the fuselage, the drive structure of the needle bar assembly is connected to the fuselage, the connection structure of the needle bar assembly is detachably connected to the crankshaft assembly, and the drive structure is electrically connected to the control assembly.

[0015] By applying the technical solution of the present application, the driving structure is connected to the needle fixing structure through the transmission structure, the needle fixing structure is movably matched with the connecting structure, and the connecting structure is matched with the crankshaft assembly, so that the driving structure can drive the needle fixing structure to move, that is, the needle fixing structure can drive the needle to move relative to the crankshaft assembly, thereby adjusting the position of the needle. With the above structure, the position of the needle can be adjusted by only driving the driving structure, so the method of adjusting the needle is flexible, fast, time-saving and labor-saving. The technical solution of the present application effectively solves the problem of time-consuming and labor-intensive adjustment of the needle position in the sewing machine in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a sewing machine needle bar assembly according to the first embodiment of the present application is shown;

[0019] Figure 2 Shows Figure 1 An exploded schematic diagram of a sewing machine needle bar assembly;

[0020] Figure 3 Shows Figure 1 A top view schematic diagram of the connection structure of the sewing machine needle bar assembly;

[0021] Figure 4 Shows Figure 1 A schematic top view of a transmission rod of a sewing machine needle bar assembly;

[0022] Figure 5 Shows Figure 4 A bottom view schematic diagram of the transmission rod.

[0023] The above drawings include the following reference numerals:

[0024] 10. Connecting structure; 20. Needle fixing structure; 30. Transmission structure; 40. Driving structure; 41. Driving motor; 42. Driving shaft; 100. Crankshaft assembly; 200. Needle. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present 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.

[0026] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0027] 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 between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0028] like Figures 1 to 5 As shown, the sewing machine needle bar assembly of the first embodiment includes: a connecting structure 10, a needle fixing structure 20, a transmission structure 30 and a drive structure 40. The connecting structure 10 cooperates with the crankshaft assembly 100 of the sewing machine. The needle fixing structure 20 is movably matched with the connecting structure 10, and the first end of the needle fixing structure 20 cooperates with the needle 200. The transmission structure 30 cooperates with the second end of the needle fixing structure 20. The output end of the drive structure 40 cooperates with the transmission structure 30.

[0029] By applying the technical solution of this embodiment, the driving structure 40 is connected to the needle fixing structure 20 through the transmission structure 30, and the needle fixing structure 20 is movably matched with the connecting structure 10, and the connecting structure 10 is matched with the crankshaft assembly 100, so that the driving structure 40 can drive the needle fixing structure 20 to move, that is, the needle fixing structure 20 can drive the needle 200 to move relative to the crankshaft assembly 100, so as to adjust the position of the needle 200. Through the above structure, only the driving structure 40 needs to be driven to adjust the position of the needle 200, so that the method of adjusting the needle 200 is flexible, fast, time-saving and labor-saving. The technical solution of this embodiment effectively solves the problem of time-consuming and labor-intensive adjustment of the position of the needle 200 in the sewing machine in the prior art.

[0030] It should be noted that after the position of the needle 200 is properly adjusted, the needle 200 can accurately align with the rotary hook of the sewing machine. The position adjustment of the needle 200 includes the rotation angle and axial distance of the needle 200.

[0031] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, in the technical solution of the first embodiment, the transmission structure 30 includes a transmission rod, and the needle fixing structure 20 includes a threaded rod, and the threaded rod and the first end of the transmission rod are movably matched through a thread. Through the threaded transmission of the threaded rod and the transmission rod, the movement of the needle 200 can be ensured to be relatively accurate. That is, the rotation is converted into translation through the transmission of the threaded rod.

[0032] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in the technical solution of the first embodiment, the first end of the transmission rod is a hollow structure with an internal thread, the first end of the threaded rod cooperates with the machine needle 200, and the second end of the threaded rod has an external thread adapted to the internal thread. The machine needle 200 is fixed to the first end of the threaded rod by a top screw, and the side wall of the first end of the threaded rod can be a smooth rod. The transmission rod is connected to the threaded rod by a thread, and the threaded rod is driven to move axially by the relative rotation of the transmission rod and the threaded rod.

[0033] like Figure 1 , Figure 2 and Figure 4 As shown, in the technical solution of the first embodiment, the second end of the transmission rod has a hollow structure, and the output end of the driving structure 40 is at least partially located in the second end of the transmission rod. Such a structure is compact and has relatively high transmission accuracy.

[0034] like Figure 1 , Figure 2 and Figure 4 As shown, in the technical solution of the first embodiment, the driving structure 40 includes a driving motor 41 and a driving shaft 42, and the driving motor 41 is connected to the driving shaft 42. When the cross-sectional area of ​​the hollow structure at the second end of the transmission rod is non-circular, the cross-sectional area of ​​the first end of the driving shaft 42 is adapted to the hollow structure at the second end of the transmission rod, and the first end of the driving shaft 42 extends into the hollow structure at the second end of the transmission rod. The above structure does not require additional tools for disassembly and assembly, and only needs to be inserted and installed to realize the driving of the transmission rod by the driving structure 40. In the technical solution of this embodiment, the cross-sectional area (cross-section) of the hollow structure at the second end of the transmission rod is a rectangle, the cross-sectional area of ​​the first end of the driving shaft 42 is also a rectangle, and the first end of the driving shaft 42 is installed with the second end of the transmission rod by interference fit. In order to ensure the strength of the transmission rod in this embodiment, the above rectangle is a square. As other embodiments, the cross-section of the hollow structure at the second end of the transmission rod and the cross-section of the first end of the drive shaft 42 may be other compatible polygons, or the cross-section of the hollow structure at the second end of the transmission rod and the cross-section of the first end of the drive shaft 42 may be ellipses that match each other.

[0035] like Figures 1 to 3As shown, in the technical solution of the first embodiment, the connection structure 10 includes a hollow rod, the length of the threaded rod is greater than the length of the hollow rod, and the threaded rod passes through the hollow rod. The part where the threaded rod and the hollow rod match is a smooth rod, and the outer diameter of the threaded rod is adapted to the inner diameter of the hollow rod (the outer diameter of the threaded rod is 0.2mm to 2mm smaller than the inner diameter of the hollow rod). For example, the outer diameter of the threaded rod is 0.5mm smaller than the inner diameter of the hollow rod, and the gap between the outer diameter of the threaded rod and the inner wall of the hollow rod is 0.25mm. Such a gap can ensure that the axial movement of the threaded rod in the hollow rod is relatively smooth, and can also ensure the binding accuracy of the hollow rod to the threaded rod.

[0036] like Figure 1 and Figure 2 As shown, in the technical solution of the first embodiment, the needle 200 is detachably connected to the first end of the threaded rod, so that the needle 200 is replaceable.

[0037] like Figure 1 and Figure 2 As shown, in the technical solution of embodiment 1, the first end of the threaded rod has a needle mounting hole extending axially, and the side wall of the first end of the threaded rod has a top screw hole, which is connected to the needle mounting hole, and the needle 200 is installed in the needle mounting hole. The above structure ensures that the needle 200 is easy to replace. When the needle 200 needs to be replaced, loosen the top screw, pull out the needle 200, and then insert the needle to be replaced into the needle mounting hole, and then tighten the top screw. It should be noted that the central axis of the top screw hole is perpendicular to the central axis of the needle mounting hole.

[0038] The difference between the technical solution of the second embodiment and the technical solution of the first embodiment is that the first end of the threaded rod matches the needle 200, the second end of the threaded rod is a hollow structure with internal threads, and the first end of the transmission rod has external threads that match the internal threads of the second end of the threaded rod. Such a structure is compact, easy to assemble and disassemble, and quick.

[0039] The technical solution of the second embodiment is applied, and the driving structure 40 is connected to the needle fixing structure 20 through the transmission structure 30. The needle fixing structure 20 is movably matched with the connecting structure 10, and the connecting structure 10 is matched with the crankshaft assembly 100. In this way, the driving structure 40 can drive the needle fixing structure 20 to move, that is, the needle fixing structure 20 can drive the needle 200 to move relative to the crankshaft assembly 100, so as to adjust the position of the needle 200. Through the above structure, the position of the needle 200 can be adjusted only by driving the driving structure 40. In this way, the method of adjusting the needle 200 is flexible, fast, time-saving and labor-saving. The technical solution of this embodiment effectively solves the problem of time-consuming and labor-intensive adjustment of the position of the needle 200 in the sewing machine in the prior art.

[0040] The difference between the technical solution of the third embodiment and the technical solution of the first embodiment is that the first end of the driving shaft has a hollow hole, the second end of the transmission rod has a hollow hole inserted into the first end of the driving shaft, and the cross section of the hollow hole of the first end of the driving shaft is adapted to the cross section of the second end of the transmission rod, for example, the cross section of the hollow hole of the first end of the driving shaft and the cross section of the second end of the transmission rod are both polygonal such as triangle, rectangle, or ellipse, etc. In this way, the driving shaft can drive the transmission rod without setting up additional structures such as top screws, latches or screws.

[0041] The technical solution of the third embodiment is applied, and the driving structure 40 is connected to the needle fixing structure 20 through the transmission structure 30. The needle fixing structure 20 is movably matched with the connecting structure 10, and the connecting structure 10 is matched with the crankshaft assembly 100. In this way, the driving structure 40 can drive the needle fixing structure 20 to move, that is, the needle fixing structure 20 can drive the needle 200 to move relative to the crankshaft assembly 100, so as to adjust the position of the needle 200. Through the above structure, the position of the needle 200 can be adjusted only by driving the driving structure 40. In this way, the method of adjusting the needle 200 is flexible, fast, time-saving and labor-saving. The technical solution of this embodiment effectively solves the problem of time-consuming and labor-intensive adjustment of the position of the needle 200 in the sewing machine in the prior art.

[0042] The difference between the technical solution of the fourth embodiment and the technical solution of the first embodiment is that when the cross-sectional area of ​​the hollow structure at the second end of the transmission rod is circular, the drive shaft 42 is connected to the second end of the transmission rod through a fastener. Such a structure does not need to be processed with high precision, thus saving processing costs.

[0043] The technical solution of the fourth embodiment is applied, and the driving structure 40 is connected to the needle fixing structure 20 through the transmission structure 30. The needle fixing structure 20 is movably matched with the connecting structure 10, and the connecting structure 10 is matched with the crankshaft assembly 100. In this way, the driving structure 40 can drive the needle fixing structure 20 to move, that is, the needle fixing structure 20 can drive the needle 200 to move relative to the crankshaft assembly 100, so as to adjust the position of the needle 200. Through the above structure, the position of the needle 200 can be adjusted only by driving the driving structure 40. In this way, the method of adjusting the needle 200 is flexible, fast, time-saving and labor-saving. The technical solution of this embodiment effectively solves the problem of time-consuming and labor-intensive adjustment of the position of the needle 200 in the sewing machine in the prior art.

[0044] It should be noted that the drive shaft 42 is a hollow structure, and the transmission rod can be inserted into the hollow structure of the drive shaft 42, and then the transmission rod and the drive shaft are connected by screws.

[0045] The difference between the technical solution of the fifth embodiment and the technical solution of the first embodiment is that the hollow rod has an internal thread, and the external thread of the threaded rod is matched with the internal thread of the hollow rod, so that the processing accuracy of the threaded rod and the hollow rod does not need to be too high, saving processing costs. In addition, the strength of the threaded rod is greatly enhanced, and the deformation caused by flexure is small.

[0046] The technical solution of the fifth embodiment is applied, and the driving structure 40 is connected to the needle fixing structure 20 through the transmission structure 30. The needle fixing structure 20 is movably matched with the connecting structure 10, and the connecting structure 10 is matched with the crankshaft assembly 100. In this way, the driving structure 40 can drive the needle fixing structure 20 to move, that is, the needle fixing structure 20 can drive the needle 200 to move relative to the crankshaft assembly 100, so as to adjust the position of the needle 200. Through the above structure, the position of the needle 200 can be adjusted only by driving the driving structure 40. In this way, the method of adjusting the needle 200 is flexible, fast, time-saving and labor-saving. The technical solution of this embodiment effectively solves the problem of time-consuming and labor-intensive adjustment of the position of the needle 200 in the sewing machine in the prior art.

[0047] According to another aspect of the present application, a sewing machine is also provided, the sewing machine includes a sewing machine main body needle bar assembly, the needle bar assembly cooperates with the sewing machine main body, and the needle bar assembly is the above-mentioned needle bar assembly. The needle 200 of the sewing machine of the present application is easy to adjust, fast, and has a relatively high adjustment accuracy. The sewing machine also includes a control component, the sewing machine main body includes a fuselage and a crankshaft assembly 100, the crankshaft assembly 100 is installed on the fuselage, the control component is arranged on the fuselage, the drive structure 40 of the needle bar assembly is connected to the fuselage, the connection structure 10 of the needle bar assembly is detachably connected to the crankshaft assembly 100, and the drive structure 40 is electrically connected to the control component. The setting of the control component makes the sewing machine of the present application more automated. It should be noted that a position collector is arranged on the drive motor of the present application, and the number of revolutions of the drive motor can be collected by the position collector, and then converted into the axial movement distance of the needle 200 through the information pre-entered in the control component, and displayed on the display screen on the fuselage. There are many ways to control the movement of the needle 200. The first way is to move the needle 200 by entering information in the control component, for example, input a downward movement of 1mm, and the drive motor drives the needle 200 to move 1mm downward. The second way is to set the control component to move a fixed distance, for example: short press the upward arrow once, the needle 200 moves up 0.2mm, long press the upward arrow once, the needle 200 moves up 0.5mm; short press the downward arrow once, the needle 200 moves down 0.2mm, long press the downward arrow once, the needle 200 moves down 0.5mm. The control component also includes a rotation button. For example, by setting the needle rotation angle of 15° on the control panel of the control component, the drive motor will control the needle 200 to rotate 15° to cooperate with the rotary shuttle. In the present application, the drive motor is detachably connected to the body by screws, and the crankshaft assembly 100 is detachably connected to the outer wall of the connecting structure 10 by screws. The sewing machines of the present application include sewing machines, stitching machines, embroidery machines, quilting machines, and the like.

[0048] 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, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] 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 be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sewing machine needle bar assembly, characterized in that: include: Connecting structure (10); A machine needle fixing structure (20), wherein the machine needle fixing structure (20) is movably matched with the connecting structure (10), and a first end of the machine needle fixing structure (20) is matched with the machine needle (200); A transmission structure (30), wherein the transmission structure (30) cooperates with the second end of the needle fixing structure (20); A driving structure (40), wherein an output end of the driving structure (40) cooperates with the transmission structure (30).

2. The sewing machine needle bar assembly according to claim 1, characterized in that: The transmission structure (30) comprises a transmission rod, and the needle fixing structure (20) comprises a threaded rod, wherein the threaded rod is movably matched with the first end of the transmission rod via a thread.

3. The sewing machine needle bar assembly according to claim 2, characterized in that: The first end of the transmission rod is a hollow structure with an internal thread, the first end of the threaded rod cooperates with the machine needle (200), and the second end of the threaded rod has an external thread that matches the internal thread; or The first end of the threaded rod cooperates with the machine needle (200), the second end of the threaded rod is a hollow structure with an internal thread, and the first end of the transmission rod has an external thread that matches the internal thread of the second end of the threaded rod.

4. The sewing machine needle bar assembly according to claim 2 or 3, characterized in that: The second end of the transmission rod has a hollow structure, and the output end of the driving structure (40) is at least partially located inside the second end of the transmission rod.

5. The sewing machine needle bar assembly according to claim 4, characterized in that: The driving structure (40) comprises a driving motor (41) and a driving shaft (42), wherein the driving motor (41) is connected to the driving shaft (42). When the cross-sectional area of ​​the hollow structure at the second end of the transmission rod is circular, the drive shaft (42) is connected to the second end of the transmission rod via a fastener; or When the cross-sectional area of ​​the hollow structure at the second end of the transmission rod is non-circular, the cross-sectional area of ​​the first end of the drive shaft (42) is adapted to the hollow structure at the second end of the transmission rod, and the first end of the drive shaft (42) extends into the hollow structure at the second end of the transmission rod.

6. The sewing machine needle bar assembly according to claim 2, characterized in that: The connection structure (10) comprises a hollow rod, the length of the threaded rod is greater than the length of the hollow rod, and the threaded rod passes through the hollow rod.

7. The sewing machine needle bar assembly according to claim 6, characterized in that: The machine needle (200) is detachably connected to the first end of the threaded rod.

8. The sewing machine needle bar assembly according to claim 7, characterized in that: The first end of the threaded rod has a machine needle mounting hole extending axially, and the side wall of the first end of the threaded rod has a top screw hole, the top screw hole is connected to the machine needle mounting hole, and the machine needle (200) is installed in the machine needle mounting hole.

9. A sewing machine, characterized in that: The sewing machine comprises a sewing machine body and a needle bar assembly, wherein the needle bar assembly cooperates with the sewing machine body, and the needle bar assembly is the needle bar assembly according to any one of claims 1 to 8.

10. The sewing machine according to claim 9, characterized in that The sewing machine also includes a control assembly. The sewing machine body includes a machine body and a crankshaft assembly (100). The crankshaft assembly (100) is installed on the machine body. The control assembly is arranged on the machine body. The drive structure (40) of the needle bar assembly is connected to the machine body. The connection structure (10) of the needle bar assembly is detachably connected to the crankshaft assembly (100). The drive structure (40) is electrically connected to the control assembly.

Images