Automatic stem reversing device and sewing machine

Abstract

The utility model relates to the technical field of sewing, in particular to an automatic stem reversing device and a sewing machine. An automatic stem pouring device is used for automatic stem pouring of materials and at least comprises a linear driving piece and a shifting piece used for stem pouring of the materials. The rotating mechanism comprises a mounting seat and a rotating seat, a rotating groove is formed in the mounting seat, the rotating seat is rotationally mounted in the rotating groove and connected with the linear driving part so as to be driven by the linear driving part to rotate relative to the mounting seat in the rotating groove, and the shifting piece is fixed to the rotating seat and can move along with the rotating seat; and the downward pressing transmission mechanism is arranged on the rotating mechanism and used for enabling the rotating seat to move towards the material stem position along the axis of the rotating groove when the mounting seat rotates so as to drive the shifting piece to perform downward pressing movement towards the stem position and perform stem pouring. Through the arrangement of the rotating mechanism, linear driving of the linear driving piece is converted into rotating downward pressing movement of the shifting piece towards the stem position, and operation is convenient while space is saved.

Description

Technical Field

[0001] This application relates to the field of sewing technology, and in particular to an automatic bobbin rewinding device and a sewing machine. Background Technology

[0002] In many industries involving sewing processes, such as garment manufacturing and bag processing, sewing machines are indispensable production equipment. During sewing operations, it is common to encounter situations where there are knots or lumps in the fabric. Traditionally, when a knot is about to enter the presser foot, the operator usually needs to manually turn off the sewing machine to stop it, then manually lift the presser foot and push the knot to the appropriate position, tilting it to one side to allow for smooth sewing. However, this traditional solution is not only inefficient but also prone to safety accidents.

[0003] In related technologies, an automatic backing mechanism is used for backing the sewing machine. This mechanism is located at the machine head and uses a cylinder to directly push the backing plate to back the sewing. However, this structure includes multiple components and has a large overall size. When this structure is installed at the machine head, it occupies the space of the sewing machine for sewing fabric, affecting the sewing process. Utility Model Content

[0004] Therefore, it is necessary to provide an automatic rewinding device and sewing machine that can save space in the sewing head.

[0005] To solve the above-mentioned technical problems, this application provides the following technical solution:

[0006] An automatic decoupling device is installed at the head of a sewing machine and used for automatically decoupling materials. The automatic decoupling device includes at least:

[0007] Linear drive components,

[0008] A pick is used to deflect the material.

[0009] A rotating mechanism includes a mounting base and a rotating base. The mounting base has a rotating groove. The rotating base is rotatably mounted in the rotating groove and connected to the linear drive member so that it can rotate relative to the mounting base in the rotating groove under the drive of the linear drive member. The paddle is fixed to the rotating base and can move with the rotating base.

[0010] A downward transmission mechanism is provided on the rotating mechanism, which is used to enable the rotating seat to move along the axis of the rotating groove toward the material block position when the mounting seat rotates, so as to drive the paddle to make a downward movement toward the block position and reverse the block.

[0011] Understandably, this application utilizes a mounting base and a rotating base to convert the linear drive of the linear drive component into circumferential motion, and combines this with a pressing transmission mechanism to move the rotating base towards the feedstock. Thus, driven by the linear drive component, the rotating base can rotate the lever and press it down towards the feedstock, thereby achieving automatic feedstock rewinding. Here, compared to linear motion, circumferential movement requires less space, and the linear drive component can be placed in other parts of the sewing machine, reducing the space occupied at the machine head and minimizing the impact on the sewing machine's operation.

[0012] By setting up a rotating mechanism including a mounting base and a rotating base, and setting a pressing transmission mechanism on the rotating mechanism, the rotating base rotates relative to the mounting base under the drive of the linear drive component, and moves along the axis of the rotating groove towards the material feed position under the drive of the pressing transmission mechanism, thereby driving the paddle to press down towards the feed position and reverse the feed. By utilizing the rotation of the rotating base and its movement along the axis of the rotating groove, the linear drive of the linear drive component can be converted into the rotational pressing motion of the paddle towards the feed position, thus not affecting the sewing action of the sewing machine. In addition, the rotating pressing of the paddle pushes the feed position from the side, saving space and facilitating operation.

[0013] In one embodiment, the pressing transmission mechanism includes a guide post and a guide groove. The guide post is disposed on the outer wall of the rotating seat, and the guide groove is opened on the peripheral wall of the rotating groove. The guide groove extends along the circumference of the rotating groove and toward the pivot direction along the axis of the rotating groove.

[0014] The guide post can cooperate with the guide groove and move in the guide groove as the rotating seat rotates, so that the rotating seat moves toward the material blockage direction.

[0015] In one embodiment, the guide groove includes an inclined groove and a horizontal groove that communicate with each other. The inclined groove extends along the circumference of the rotating groove and toward the locating direction along the axis of the rotating groove. The horizontal groove is located below the inclined groove in the axial direction of the rotating groove and is on the same horizontal plane and extends along the circumference of the rotating groove.

[0016] It is understandable that by setting inclined grooves and horizontal grooves, the guide column moves along the inclined groove to drive the paddle to press down toward the stem position, and the guide column moves along the horizontal groove to reverse the stem. The setting of the horizontal groove makes the paddle move in the same plane when reversing the stem, so the reversing effect is better.

[0017] In one embodiment, the inclined groove is open at one end away from the horizontal groove in the axial direction of the rotating groove;

[0018] The guide post can enter or exit the inclined groove through the opening.

[0019] In one embodiment, the number of guide slots is configured to be two, and the two guide slots are symmetrically arranged about the axis of the rotating slot as an axis of symmetry;

[0020] The number of guide pillars corresponds one-to-one with the number of guide slots and is matched with each other.

[0021] In one embodiment, the rotating mechanism further includes a drive plate, one end of which is fixed to the rotating seat, and the other end of which has a drive groove. The output end of the linear drive is confined within the drive groove and can drive the rotating seat to rotate relative to the mounting base through the drive plate.

[0022] It is understandable that by opening a drive slot, the output end is confined within the drive slot. When the linear drive component drives the rotary seat to rotate through linear motion, the output end can move within the drive slot, so that the linear drive component can adapt to the angle change of the rotary seat, thereby making the power transmission between the linear drive component and the rotary seat more stable.

[0023] In one embodiment, the automatic decanting device further includes an elastic mechanism that is positioned along the axial direction of the rotating groove against the rotating seat to apply a force toward the decanting position to the rotating seat in the axial direction of the rotating groove.

[0024] In one embodiment, the elastic mechanism includes a column and an elastic element. The column extends along the axial direction of the rotating groove, and one end of the column is fixed to the mounting base, while the other end passes through and exits the rotating base. The elastic element is sleeved on the end of the column that exits the rotating base, and one end of the elastic element is confined within the column, while the other end is confined within the rotating base.

[0025] In one embodiment, the automatic destemming device further includes a detection element that is signal-connected to the linear drive element and is used to detect the position of the destemmed part and generate a feedback signal to control the linear drive element to start and perform linear motion.

[0026] This application also provides the following technical solutions:

[0027] A sewing machine includes an automatic bobbin rewinding device as described in any of the above embodiments.

[0028] Compared to existing technologies, the automatic bobbin rewinding device, by setting up a mounting base and a rotating base, utilizes the rotation of the rotating base to convert the linear drive of the linear drive component into circumferential motion, and combines this with a pressing transmission mechanism to move the rotating base toward the bobbin position. Thus, driven by the linear drive component, the rotating base can drive the lever to rotate and press down toward the bobbin position, thereby achieving automatic bobbin rewinding. Here, compared to linear motion, circumferential movement requires less space, and the linear drive component can be placed in other parts of the sewing machine, thereby reducing the space occupied at the machine head and minimizing the impact on the sewing operation. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a schematic diagram of the automatic decanting device provided in this application.

[0031] Figure 2 For this application Figure 1 Enlarged view of point A in the middle.

[0032] Figure 3 For this application Figure 1 Exploded view of the automatic deflector device.

[0033] Figure 4 For this application Figure 3 Enlarged view of point B in the middle.

[0034] Figure 5 A schematic diagram of the automatic bobbin rewinding device provided in this application installed on a sewing machine.

[0035] Figure 6 For this application Figure 5 Enlarged view of point C in the middle.

[0036] The component labels are as follows:

[0037] 100. Automatic decoy device; 10. Linear drive component; 11. Output end; 12. Connector; 20. Paddle; 21. Connecting part; 211. Connecting groove; 22. Decoy part; 30. Rotating mechanism; 31. Mounting base; 311. Rotating groove; 32. Rotating seat; 33. Drive plate; 331. Drive groove; 40. Downward transmission mechanism; 41. Guide column; 42. Guide groove; 421. Inclined groove; 422. Horizontal groove; 423. Opening; 50. Elastic mechanism; 51. Column; 52. Elastic component; 60. Detection component;

[0038] 200. Sewing machine; 210. Machine head; 220. Material; 230. Gear position. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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," "over," and "on top" 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 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 than the second feature.

[0043] 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.

[0044] Please see Figure 1 and Figure 5 This application provides an automatic rewinding device 100, which is installed at the head 210 of a sewing machine 200 for automatically rewinding the material 220 at the rewinding position 230.

[0045] Specifically, the automatic destemming device 100 includes at least a linear drive 10, a paddle 20, a rotating mechanism 30, and a pressing transmission mechanism 40. The paddle 20 is used to destem the material 220; the rotating mechanism 30 includes a mounting base 31 and a rotating seat 32. The mounting base 31 has a rotating groove 311, and the rotating seat 32 is rotatably mounted in the rotating groove 311 and connected to the linear drive 10, so that it can rotate relative to the mounting base 31 in the rotating groove 311 under the drive of the linear drive 10. The paddle 20 is fixed on the rotating seat 32 and can move with the rotating seat 32; the pressing transmission mechanism 40 is provided on the rotating mechanism 30, and is used to enable the rotating seat 32 to move along the axis of the rotating groove 311 toward the destemmed position 230 of the material 220 when the mounting base 31 rotates, so as to drive the paddle 20 to press down toward the destemmed position 230 and destem the material. Thus, by setting up the mounting base 31 and the rotating base 32, the rotation of the rotating base 32 converts the linear drive of the linear drive member 10 into circumferential motion, and combined with the pressing transmission mechanism 40, the rotating base 32 moves towards the feedstock position. Thus, driven by the linear drive member 10, the rotating base 32 can drive the paddle 20 to rotate and press down towards the feedstock position 230, thereby achieving automatic feedstock rewinding. Here, compared to linear motion, circumferential movement requires less space, and the linear drive member 10 can be placed in other parts of the sewing machine 200, thereby reducing the space occupied at the machine head 210 and minimizing the impact on the sewing operation of the sewing machine 200.

[0046] like Figure 1 and Figure 2 As shown, in one embodiment, the linear drive 10 is provided with an output end 11, and is connected to the rotary mechanism 30 through the output end 11. Here, the linear drive 10 can be a ball screw, linear motor, hydraulic cylinder, pneumatic cylinder, or other similar structure.

[0047] In this embodiment, the linear drive 10 is configured as a cylinder, and the output end 11 is a piston rod. The piston rod is connected to the rotary seat 32 via a connector 12.

[0048] Preferably, the connector 12 can be configured as a ball joint structure, a universal joint structure, etc., so that the connector 12 can swing when subjected to forces in different directions by the swivel seat 32, thus avoiding the problem of jamming.

[0049] like Figure 2 and Figure 4 As shown, the paddle 20 includes a connecting part 21 and a tilting part 22. The connecting part 21 is used to connect with the rotating seat 32. The tilting part 22 is arranged along the connecting part 21 toward the stem position 230, and the tilting part 22 is set in a flat shape to facilitate the paddle 20 to push the stem position 230 to one side.

[0050] Furthermore, the connecting part 21 is provided with an elongated connecting groove 211, which is connected to the rotating seat 32 by a threaded component. It can be understood that by making the connecting groove 211 elongated, the position of the lever 20 on the rotating seat 32 can be adjusted, thereby adjusting the position of the decanting part 22 relative to the decanting position 230, so that the automatic decanting device 100 can be applied to decanting different decanting positions 230.

[0051] Here, the threaded component can be a screw or bolt, etc.

[0052] like Figures 2 to 4 As shown, the rotating mechanism 30 also includes a drive plate 33. One end of the drive plate 33 is fixed to the rotating seat 32, and the other end has a drive groove 331. The output end 11 of the linear drive member 10 is confined within the drive groove 331 and can drive the rotating seat 32 to rotate relative to the mounting base 31 through the drive plate 33. It can be understood that by opening the drive groove 331 and confining the output end 11 within the drive groove 331, when the linear drive member 10 drives the rotating seat 32 to rotate through linear motion, the output end 11 can move within the drive groove 331, so that the linear drive member 10 can adapt to the angle change of the rotating seat 32, thereby making the power transmission between the linear drive member 10 and the rotating seat 32 more stable.

[0053] In this embodiment, the drive plate 33 and the rotating base 32 are fixedly connected by screws. The connecting part 21 is fixedly connected to the drive plate 33 by screws, thereby indirectly mounting it on the rotating base 32.

[0054] In one embodiment, the pressing transmission mechanism 40 includes an internal thread provided on the peripheral wall of the rotating groove 311 and an external thread provided on the outer periphery of the rotating seat 32. The internal thread and the external thread are directly threaded together, thereby realizing the rotational connection between the rotating seat 32 and the mounting seat 31, and using the thread to realize the pressing action (movement toward the mounting position 230) during the rotation of the rotating seat 32.

[0055] like Figure 4As shown, in this embodiment, the pressing transmission mechanism 40 includes a guide post 41 and a guide groove 42. The guide post 41 is disposed on the outer wall of the rotating seat 32, and the guide groove 42 is formed on the peripheral wall of the rotating groove 311. The guide groove 42 extends along the circumference of the rotating groove 311 and towards the stub 230 along the axis of the rotating groove 311. The guide post 41 can cooperate with the guide groove 42 and move in the guide groove 42 as the rotating seat 32 rotates, so that the rotating seat 32 moves towards the stub 230 of the material 220. Alternatively, the guide post 41 can be disposed on the peripheral wall of the rotating groove 311, and the guide groove 42 can be disposed on the outer wall of the rotating seat 32.

[0056] Preferably, two guide grooves 42 are configured, and the two guide grooves 42 are symmetrically arranged about the axis of the rotating groove 311. The number of guide posts 41 corresponds one-to-one with the number of guide grooves 42 and is matched with each other. In this way, by setting two guide grooves 42 and guide posts 41, there are two points to guide the movement of the rotating seat 32, making the trajectory of the rotating seat 32 more stable when it moves along the axis of the rotating groove 311.

[0057] In one embodiment, the guide groove 42 includes an inclined groove 421 and a horizontal groove 422 that are interconnected. The inclined groove 421 extends along the circumference of the rotating groove 311 and toward the pivot position 230 along the axis of the rotating groove 311. The horizontal groove 422 is located below the inclined groove 421 along the axis of the rotating groove 311 and extends along the circumference of the rotating groove 311 on the same horizontal plane. Thus, by setting the guide groove 42 as an inclined groove 421 and a horizontal groove 422, the guide post 41 moves along the inclined groove 421 to drive the paddle 20 to press down toward the pivot position 230, and the guide post 41 moves along the horizontal groove 422 to reverse the pivot. The setting of the horizontal groove allows the paddle 20 to move a certain distance on the same plane when reversing the pivot, thus improving the reversing effect.

[0058] Please continue to refer to this. Figure 4 The inclined groove 421 is provided with an opening 423 at one end away from the horizontal groove 422 in the axial direction of the rotating groove 311; wherein the guide post 41 can enter or exit the inclined groove 421 through the opening 423.

[0059] like Figure 1 and Figure 2 As shown, the automatic decanting device 100 also includes an elastic mechanism 50, which is positioned along the axial direction of the rotating groove 311 and abuts against the rotating seat 32 to apply a force toward the decanting position 230 to the rotating seat 32 in the axial direction of the rotating groove 311, thereby making the trajectory of the rotating seat 32 rotating and pressing down more stable.

[0060] Specifically, the elastic mechanism 50 includes a column 51 and an elastic element 52. The column 51 extends along the axial direction of the rotating groove 311, with one end fixed to the mounting base 31 and the other end passing through and exiting the rotating base 32. The elastic element 52 is sleeved on the end of the column 51 that exits the rotating base 32, with one end of the elastic element 52 confined within the column 51 and the other end confined within the rotating base 32. Here, the column 51 passes through and exits the rotating base 32, meaning that the rotating base 32 can also rotate relative to the column 51.

[0061] Preferably, the elastic element 52 is configured as a tower spring or a cylindrical spring.

[0062] like Figure 4 As shown, the automatic backing device 100 also includes a detection element 60, which is signal-connected to the linear drive 10 and used to detect the position of the backing position 230 and generate a feedback signal to control the linear drive 10 to start and perform linear motion. The specific location of the detection element 60 is not limited; it can be installed on the body of the sewing machine 200 or at the head 210 of the sewing machine, as long as it can detect the position of the backing position 230. The detection element 60 can be configured as a distance detector, that is, to reflect the position of the backing position 230 by detecting the travel distance of the material 220. Of course, it is not limited to this; the detection element 60 can also be configured as a laser sensor, a touch sensor, etc., which emits a feedback signal when the backing position 230 is detected.

[0063] like Figure 5 and Figure 6 As shown, this application also provides the following technical solution: a sewing machine 200, including an automatic bobbin rewinding device 100 as described in any of the above embodiments.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] 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. An automatic rewinding device, disposed at the head (210) of a sewing machine (200) and used for automatically rewinding materials (220), characterized in that, The automatic decanting device (100) includes at least: Linear drive (10) A pry bar (20) is used to deflect the material (220); The rotating mechanism (30) includes a mounting base (31) and a rotating base (32). The mounting base (31) has a rotating groove (311). The rotating base (32) is rotatably mounted in the rotating groove (311) and connected to the linear drive (10) so that it can rotate relative to the mounting base (31) in the rotating groove (311) under the drive of the linear drive (10). The paddle (20) is fixed on the rotating base (32) and can move with the rotating base (32). The pressing transmission mechanism (40) is provided on the rotating mechanism (30) and is used to enable the rotating seat (32) to move along the axis of the rotating groove (311) toward the stalk position (230) of the material (220) when the rotating seat (32) rotates, so as to drive the paddle (20) to press down toward the stalk position (230) and reverse the stalk.

2. The automatic stem-removing device according to claim 1, characterized in that, The pressing transmission mechanism (40) includes a guide post (41) and a guide groove (42). The guide post (41) is disposed on the outer wall of the rotating seat (32). The guide groove (42) is opened on the peripheral wall of the rotating groove (311). The guide groove (42) extends along the circumference of the rotating groove (311) and towards the shank (230) along the axis of the rotating groove (311). The guide post (41) can cooperate with the guide groove (42) and move in the guide groove (42) as the rotating seat (32) rotates, so that the rotating seat (32) moves toward the material (220) stump (230).

3. The automatic stem-removing device according to claim 2, characterized in that, The guide groove (42) includes an inclined groove (421) and a horizontal groove (422) that are interconnected. The inclined groove (421) extends along the circumference of the rotating groove (311) and toward the shank (230) on the axis of the rotating groove (311). The horizontal groove (422) is located below the inclined groove (421) in the axial direction of the rotating groove (311), and the horizontal groove (422) is on the same horizontal plane and extends along the circumference of the rotating groove (311).

4. The automatic stem-removing device according to claim 3, characterized in that, In the axial direction of the rotating groove (311), the inclined groove (421) is provided with an open end (423) away from the horizontal groove (422); The guide post (41) can enter or exit the inclined groove (421) through the opening (423).

5. The automatic stem-removing device according to claim 2, characterized in that, The number of guide grooves (42) is configured to be two, and the two guide grooves (42) are symmetrically arranged about the axis of the rotating groove (311). The number of guide pillars (41) corresponds one-to-one with the number of guide grooves (42) and they are matched and set together.

6. The automatic stem-removing device according to claim 1, characterized in that, The rotating mechanism (30) also includes a drive plate (33), one end of which is fixed to the rotating seat (32), and the other end is provided with a drive groove (331). The output end (11) of the linear drive (10) is located in the drive groove (331) and can drive the rotating seat (32) to rotate relative to the mounting seat (31) through the drive plate (33).

7. The automatic stalk-removing device according to any one of claims 1 to 6, characterized in that, The automatic stem-removing device (100) further includes an elastic mechanism (50) that is positioned against the rotating seat (32) along the axial direction of the rotating groove (311) to apply a force toward the stem position (230) to the rotating seat (32) in the axial direction of the rotating groove (311).

8. The automatic stem-removing device according to claim 7, characterized in that, The elastic mechanism (50) includes a column (51) and an elastic element (52). The column (51) extends along the axial direction of the rotating groove (311), and one end of the column (51) is fixed to the mounting base (31), while the other end passes through and exits the rotating base (32). The elastic element (52) is sleeved on the end of the column (51) that exits the rotating base (32), and one end of the elastic element (52) is limited to the column (51), while the other end is limited to the rotating base (32).

9. The automatic stalk-removing device according to any one of claims 1 to 6, characterized in that, The automatic de-stem device (100) further includes a detection element (60), which is signal-connected to the linear drive (10) and is used to detect the position of the stump (230) and generate a feedback signal to control the linear drive (10) to start and perform linear motion.

10. A sewing machine, characterized in that, Includes the automatic destemming device (100) as described in any one of claims 1-9.

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