Swing needle assembly and sewing machine thereof

Abstract

The utility model provides a kind of needle swing assembly and sewing machine, belong to sewing machine technical field.A kind of needle swing assembly, comprising: moving frame;Needle bar, the needle bar slidingly disposed on the moving frame, the needle bar is up and down active relative to the moving frame;Drive frame, the drive frame is fixedly connected with the needle bar;Swing drive group, the swing drive group is connected with the moving frame, for driving the moving frame to and fro moves in horizontal direction;Thread guide drive group, the thread guide drive group is connected with the drive frame, for driving the drive frame to move up and down in vertical direction.The utility model has the advantages that needle head is perpendicular relative to fabric, and swing range is big.

Description

Technical Field

[0001] This utility model belongs to the field of sewing machine technology, and in particular to a needle swing assembly and the sewing machine thereof. Background Technology

[0002] The traditional sewing machine's needle swing mechanism uses an adjustable needle bar angle. The upper end of the needle bar is hinged, and there is a relative tilt angle between the needle and the fabric. The swing angle cannot be too large, and the swing is restricted. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a oscillating needle assembly that features a needle tip perpendicular to the fabric and a large oscillation range.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A oscillating needle assembly, comprising:

[0006] Mobile rack;

[0007] A needle bar, which is slidably mounted on the movable frame and moves up and down relative to the movable frame;

[0008] A drive frame, which is fixedly connected to the needle bar;

[0009] A swing drive assembly, which is connected to the movable frame, is used to drive the movable frame to move back and forth in the horizontal direction;

[0010] A line-picking drive assembly is connected to the drive frame and is used to drive the drive frame to move up and down in the vertical direction.

[0011] In the above-mentioned oscillating needle assembly, a connecting rod is fixed on the moving frame, and an adjusting component is fixed on the connecting rod. The adjusting component has a guide groove. The oscillating drive group includes a drive motor, a first eccentric block, and a roller. One end of the first eccentric block is fixed on the output shaft of the drive motor, and a roller is rotatably arranged on the other end. The roller is arranged in the guide groove, and the outer peripheral surface of the roller can abut against one of the side walls of the guide groove.

[0012] In the aforementioned oscillating needle assembly, the thread take-up drive group includes a main shaft, a second eccentric block, a connecting piece, and a connecting rod. A sliding rod is fixed on the drive frame, and the sliding rod is parallel to the translational direction of the moving frame. A sliding hole is provided at the lower end of the connecting rod, and the sliding rod is slidably assembled at the sliding hole of the connecting rod. The second eccentric block is fixedly connected to the main shaft. A connecting piece is eccentrically rotatably disposed on the second eccentric block, and the other end of the connecting piece is rotatably connected to the upper end of the connecting rod.

[0013] In the aforementioned oscillating needle assembly, the connecting rod is parallel to the main shaft.

[0014] In the above-mentioned oscillating needle assembly, the needle bar is perpendicular to the connecting rod and the main shaft, respectively.

[0015] The aforementioned oscillating needle assembly also includes a guide portion. The movable frame has a guide groove, and the guide portion is assembled in the guide groove to allow the movable frame to translate.

[0016] A sewing machine including the aforementioned bobbin assembly.

[0017] Compared with the prior art, this application has the following advantages:

[0018] This application differs from other zigzag sewing methods that achieve oscillation by changing the angle of the needle holder. This sewing method is vertical, which is not only more stable than angular oscillation methods, but also allows for a longer oscillation distance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram in this application;

[0020] Figure 2 This is a three-dimensional structural diagram from another perspective in this application;

[0021] Figure 3 This is a structural diagram of the swing drive assembly in this application;

[0022] In the picture,

[0023] 2. Moving frame; 21. Connecting rod; 22. Adjusting component; 221. Guide groove; 23. Guide slot;

[0024] 3. Needle bar;

[0025] 4. Drive frame; 41. Slide bar;

[0026] 5. Swing drive assembly; 51. Drive motor; 52. First eccentric block; 53. Roller;

[0027] 6. Thread-picking drive assembly; 61. Main spindle; 62. Second eccentric block; 63. Connecting plate; 64. Connecting rod;

[0028] 7. Guiding section. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0030] like Figures 1 to 3 As shown, a needle-spinning assembly includes: a movable frame 2, a needle bar 3, a drive frame 4, a swing drive group 5, and a thread take-up drive group 6. The needle bar 3 is slidably mounted on the movable frame 2 and moves up and down relative to the movable frame 2. The drive frame 4 is fixedly connected to the needle bar 3. The swing drive group 5 is connected to the movable frame 2 and is used to drive the movable frame 2 to move back and forth in the horizontal direction. The thread take-up drive group 6 is connected to the drive frame 4 and is used to drive the drive frame 4 to move up and down in the vertical direction.

[0031] When the device is started, the swing drive group 5 is directly connected to the moving frame 2, which will drive the moving frame 2 to move back and forth in the horizontal direction. Since the needle bar 3 is mounted on the moving frame 2 through a sliding fit, the horizontal movement of the moving frame 2 will directly drive the needle bar 3 to swing horizontally in sync. Finally, the needle at the lower end of the needle bar 3 swings with the needle bar 3, forming a horizontal needle trajectory above the fabric, which meets the forming requirements of different sewing stitches such as zigzag stitches. In this application, in practical applications, the horizontal swing amplitude can be adjusted within the range of 0-12mm, which is a large adjustment range.

[0032] While the swing drive group 5 is working, the thread take-up drive group 6 starts synchronously. Its power output end is connected to the drive frame 4. The thread take-up drive group 6 drives the drive frame 4 to move up and down in the vertical direction. Since the drive frame 4 and the needle bar 3 are rigidly fixed, the needle bar 3 will complete the up and down reciprocating motion synchronously with the drive frame 4.

[0033] This application differs from other zigzag sewing methods that achieve oscillation by changing the angle of the needle holder. This sewing method is vertical, which is not only more stable than angular oscillation methods, but also allows for a longer oscillation distance.

[0034] In this application, the needle is fixed at the bottom end of the needle rod 3.

[0035] Specifically, a connecting rod 21 is fixed on the movable frame 2, and an adjusting component 22 is fixed on the connecting rod 21. The adjusting component 22 has a guide groove 221. The swing drive group 5 includes a drive motor 51, a first eccentric block 52, and a roller 53. One end of the first eccentric block 52 is fixed on the output shaft of the drive motor 51, and the other end is rotatably equipped with a roller 53. The roller 53 is disposed in the guide groove 221, and the outer peripheral surface of the roller 53 can abut against one of the side walls of the guide groove 221.

[0036] When the first eccentric block 52 makes a circular motion, the roller 53 moves along the trajectory of the eccentric block, but is restricted by the side walls of the guide groove 221, thereby driving the adjusting component 22 to translate, and further driving the moving frame 2 to translate. The rolling contact between the roller 53 and the guide groove 221 replaces the sliding contact, which greatly reduces the frictional resistance in the transmission process, reduces component wear, and ensures the smoothness of motion transmission.

[0037] Here, during the driving process, the connecting rod 21 moves horizontally reciprocating and will not move in other directions. Specifically, it can be limited by other structures in the sewing machine to ensure that the connecting rod 21 can only move horizontally reciprocating.

[0038] Specifically, the thread-picking drive assembly 6 includes a main shaft 61, a second eccentric block 62, a connecting piece 63, and a connecting rod 64. A sliding rod 41 is fixed on the drive frame 4. The sliding rod 41 is parallel to the translation direction of the moving frame 2. A sliding hole is provided at the lower end of the connecting rod 64, and the sliding rod 41 is slidably assembled at the sliding hole of the connecting rod 64. The second eccentric block 62 is fixedly connected to the main shaft 61. The connecting piece 63 is eccentrically rotatably mounted on the second eccentric block 62, and the other end of the connecting piece 63 is rotatably connected to the upper end of the connecting rod 64.

[0039] When the sewing machine starts, the main shaft 61 rotates at a constant speed. The second eccentric block 62, which is fixedly connected to the main shaft 61, moves synchronously with the main shaft 61. The second eccentric block 62 drives the connecting piece 63 to rotate, the connecting piece 63 drives the connecting rod 64 to move, the connecting rod 64 drives the drive frame 4 to move up and down, and the drive frame 4 drives the needle bar 3 to move up and down. The slide rod 41 on the drive frame 4 is slidably connected to the connecting rod 64. When the moving frame 2 moves and drives the needle bar 3 to move, the slide rod 41 slides relative to the connecting rod 64, but still maintains the connection state. When the drive frame 4 moves up and down, it can synchronously drive the needle bar 3 to move up and down.

[0040] Specifically, the connecting rod 21 is parallel to the main shaft 61.

[0041] Specifically, the needle bar 3 is perpendicular to the connecting rod 21 and the main shaft 61, respectively.

[0042] Specifically, it also includes a guide part 7, and a guide groove 23 is provided on the movable frame 2. The guide part 7 is assembled in the guide groove 23 so that the movable frame 2 can move horizontally.

[0043] By designing the structure of guide section 7 and guide groove 23, the translation of the moving frame 2 is more stable.

[0044] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture, as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0045] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Meanwhile, the word "and / or" throughout the text means including three solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0046] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0047] The specific embodiments described herein are merely illustrative examples of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from this utility model or exceeding the scope defined by the appended claims.

Claims

1. A oscillating needle assembly, characterized in that, include: Mobile rack (2); The needle bar (3) is slidably mounted on the movable frame (2) and moves up and down relative to the movable frame (2); Drive frame (4), the drive frame (4) is fixedly connected to the needle bar (3); A swing drive group (5) is connected to the movable frame (2) and is used to drive the movable frame (2) to move back and forth in the horizontal direction; The line-picking drive group (6) is connected to the drive frame (4) and is used to drive the drive frame (4) to move up and down in the vertical direction.

2. The oscillating needle assembly according to claim 1, characterized in that, A connecting rod (21) is fixed on the movable frame (2), and an adjusting component (22) is fixed on the connecting rod (21). The adjusting component (22) has a guide groove (221). The swing drive group (5) includes a drive motor (51), a first eccentric block (52), and a roller (53). One end of the first eccentric block (52) is fixed on the output shaft of the drive motor (51), and a roller (53) is rotatably arranged on the other end. The roller (53) is arranged in the guide groove (221), and the outer peripheral surface of the roller (53) can abut against one of the side walls of the guide groove (221).

3. The oscillating needle assembly according to claim 2, characterized in that, The thread-picking drive assembly (6) includes a main shaft (61), a second eccentric block (62), a connecting piece (63), and a connecting rod (64). A sliding rod (41) is fixed on the drive frame (4). The sliding rod (41) is parallel to the translation direction of the moving frame (2). A sliding hole is provided at the lower end of the connecting rod (64). The sliding rod (41) is slidably assembled at the sliding hole of the connecting rod (64). The second eccentric block (62) is fixedly connected to the main shaft (61). A connecting piece (63) is eccentrically rotatably arranged on the second eccentric block (62). The other end of the connecting piece (63) is rotatably connected to the upper end of the connecting rod (64).

4. The oscillating needle assembly according to claim 3, characterized in that, The connecting rod (21) is parallel to the main shaft (61).

5. The oscillating needle assembly according to claim 3, characterized in that, The needle bar (3) is perpendicular to the connecting rod (21) and the main shaft (61) respectively.

6. The oscillating needle assembly according to claim 1, characterized in that, It also includes a guide part (7), on which a guide groove (23) is provided, and the guide part (7) is assembled in the guide groove (23) so that the moving frame (2) can be translated.

7. A sewing machine, characterized in that, Includes the oscillating needle assembly as described in any one of claims 1-6.

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