Automatic shuttle changing device of sewing machine

Abstract

The invention relates to an automatic shuttle changing device of a sewing machine, and relates to the technical field of sewing machine production, the automatic shuttle changing device comprises a clamping mechanism used for clamping and limiting a shuttle case, and the clamping mechanism comprises a middle connecting column used for limiting the center position of the shuttle case; a first fixing plate used for clamping and fixing the bobbin case is fixed to the side edge of the middle connecting column, a second rotating plate is rotationally arranged on the middle connecting column, and the second rotating plate and the first fixing plate can rotate relatively. The limiting function of the bobbin case is achieved through the first fixing plate, the second rotating plate and the middle connecting column, that is, during use, the first fixing plate and the second rotating plate are used for clamping the two sides of the bobbin case correspondingly through the cooperation effect of the first fixing plate and the second rotating plate; then the middle connecting column is used for limiting the central position of the bobbin case, and during use, the bobbin is limited on the middle connecting column, so that stable clamping of the bobbin can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of sewing machine manufacturing technology, specifically to an automatic shuttle changing device for a sewing machine. Background Technology

[0002] Automatic shuttle changer (ASH) refers to the process of replacing the bobbin with a used bobbin thread using an automated device to maintain the continuity of the sewing process. The ASH device can monitor the bobbin thread allowance at the shuttle and automatically replace the bobbin when the bobbin thread allowance is insufficient, thereby improving production efficiency and reducing labor consumption.

[0003] The patent application with application number 201820704461.0 discloses an automatic shuttle changing device for a sewing machine, specifically disclosing that automatic shuttle changing is achieved by using a swing arm and a cylinder, which has the characteristics of simple structure and high efficiency.

[0004] In the above technical solution, the automatic shuttle change of the sewing machine uses a gripper device to clamp the shuttle core in order to replace the shuttle core. However, during this process, the gripper device cannot hold the shuttle core in place, resulting in a certain gap when the shuttle core is engaged with the gripper, which makes it impossible to accurately position the shuttle core and causes the shuttle case to be installed incorrectly. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic shuttle changing device for a sewing machine.

[0006] The technical problem solved by this invention is to address the issue that the existing gripper device cannot fix the bobbin, resulting in deviations in the bobbin case installation.

[0007] The present invention can be achieved by the following technical solution: an automatic shuttle changing device for a sewing machine, including a clamping mechanism for clamping and limiting the shuttle case, the clamping mechanism including an intermediate connecting column for limiting the center position of the shuttle case, and a first fixing plate for clamping and fixing the shuttle case is fixed on the side of the intermediate connecting column, and a second rotating plate is rotatably arranged on the intermediate connecting column, and the second rotating plate and the first fixing plate are rotatable relative to each other.

[0008] A further technical improvement of the present invention is that: a limiting post for limiting the shuttle shell is fixed on the first fixed plate and the second rotating plate respectively, and the limiting post is made of friction rubber.

[0009] A further technical improvement of the present invention is that: a rotating gear is fixed on the side of the second rotating plate, and a drive motor is fixed on the middle connecting column, and the drive motor drives the connecting gear, which meshes with the rotating gear.

[0010] A further technical improvement of the present invention is that: a central hole is provided on the intermediate connecting post for cooperating with the inner sleeve on the shuttle shell, and an internal tray is slidably provided inside the central hole for receiving and limiting the inner sleeve, and the internal tray is spring-loaded.

[0011] A further technical improvement of the present invention is that it also includes a limiting housing for installation and connection with the shuttle case, the limiting housing having an internal rod for engaging with the inner sleeve on the shuttle case, and an internal limiting block for limiting the shuttle case to the outside.

[0012] A further technical improvement of the present invention is that the internal rod and the limiting housing are slidably connected, and the end of the internal rod is fixed with a pressing platform, and a tension spring is provided between the pressing platform and the limiting housing.

[0013] A further technical improvement of the present invention is that a rotating plate is rotatably mounted on the internal rod via a torsion spring, and a clamping protrusion for cooperating with the shuttle case is fixed at the end of the rotating plate.

[0014] A further technical improvement of the present invention is that a guide roller is connected to the side of the limiting housing via a micro motor, a traction rope is wound on the guide roller, and the end of the traction rope is fixedly installed on the rotating plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This application utilizes a first fixed plate, a second rotating plate, and an intermediate connecting post to achieve the limiting function of the bobbin case. Specifically, during use, the first fixed plate and the second rotating plate work together to clamp the two sides of the bobbin case. The intermediate connecting post then limits the center position of the bobbin case. During use, the bobbin is restrained on the intermediate connecting post, ensuring stable clamping of the bobbin. Therefore, in this application, the bobbin case and bobbin require pre-processing to ensure a stable connection before installation via the clamping jaws. This avoids gaps caused by direct contact between the bobbin and the clamping jaws, thereby ensuring accuracy when replacing the bobbin case and reducing the amount of defective products.

[0016] 2. This application utilizes a first fixed plate and a second rotating plate that can rotate relative to each other, so that the first fixed plate and the intermediate connecting post can perform a relative positioning function of the bobbin and the bobbin case, thereby ensuring the initial stability of the bobbin case. Subsequently, the rotation of the second rotating plate clamps the second rotating plate on the other side of the bobbin case, so as to further ensure that the intermediate connecting post can be in the center position of the bobbin case and ensure the accuracy of the bobbin case installation. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram showing the relative positions of the first fixed plate and the second rotating plate of the present invention; Figure 2 This is a schematic diagram showing the position of the clamping component of the present invention; Figure 3 This is a schematic diagram of the rotational power of the second rotating plate of the present invention; Figure 4 This is a perspective view of the present invention; Figure 5 This is a schematic diagram of the internal structure of the hole in the column of the present invention; Figure 6 For the present invention Figure 3 A partial enlarged view of point A in the middle; Figure 7 For the present invention Figure 5 A magnified view of a section at point B in the middle; Figure 8 This is a schematic diagram showing the location of the installation mechanism of the present invention; Figure 9 This is a schematic diagram of the installation mechanism of the present invention.

[0019] In the diagram: 1. Shuttle shell; 2. Clamping mechanism; 21. Clamping assembly; 211. First fixed plate; 212. Second rotating plate; 213. Column hole; 214. Disc base; 215. Rotating gear; 216. Mating gear; 217. Drive motor; 218. Internal tray; 219. Compression spring; 2110. Internal sliding hole; 2111. Compression column; 22. Intermediate connecting column; 23. Push cylinder; 3. Installation mechanism; 31. Limiting housing; 32. Rotating plate; 33. Mating platform; 34. Compression platform; 35. Compression spring; 36. Guide roller; 37. Traction rope; 38. Clamping protrusion; 39. Internal limiting block; 310. Internal rod; 4. Inner sleeve. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] Please see Figure 1-9 As shown, an automatic shuttle changing device for a sewing machine includes a clamping mechanism 2 for clamping the shuttle case 1. The clamping mechanism 2 is transferred to the installation station, and the shuttle case 1 is fixedly installed by the installation mechanism 3. Specifically, the shuttle case 1 is clamped by the clamping mechanism 2, and then the shuttle case 1 is installed on the installation station by cooperating with the installation mechanism 3, thereby realizing the automatic replacement of the shuttle case 1.

[0022] Specifically, in order to clamp the shuttle shell 1, the clamping mechanism 2 is installed on the moving mold. The moving mold controls the position of the clamping mechanism 2, so that the clamping mechanism 2 can clamp and remove the shuttle shell 1 from the storage warehouse, and can also transfer it to the installation station for installation, so as to achieve precise positioning of the clamping mechanism 2.

[0023] The clamping mechanism 2 includes a push cylinder 24, wherein a clamping frame 23 is fixed to the end of the push cylinder 24, and an intermediate connecting column 22 is fixedly installed on the clamping frame 23. The intermediate connecting column 22 is used to limit the shuttle shell 1, and a clamping component 21 is fixed outside the intermediate connecting column 22. The clamping component 21 is used to realize the clamping and limiting function of the shuttle shell 1. In use, the push cylinder 24 pushes the clamping component 21 to move, so that the clamping component 21 acts on the shuttle shell 1 to realize the clamping and fixing of the shuttle shell 1. At the same time, the intermediate connecting column 22 acts inside the shuttle shell 1 to further limit the shuttle shell 1.

[0024] The clamping assembly 21 includes a first fixed plate 211 and a second rotating plate 212. The first fixed plate 211 is fixedly mounted on the intermediate connecting post 22, and the second rotating plate 212 is rotatably mounted on the intermediate connecting post 22 by a drive mechanism. The first fixed plate 211 and the second rotating plate 212 are aligned when fixed, and the shuttle shell 1 is fixed when the second rotating plate 212 and the first fixed plate 211 rotate relative to each other.

[0025] Taking the first fixed plate 211 and the second rotating plate 212 as an example, the first fixed plate 211 and the second rotating plate 212 have the same structure. The first fixed plate 211 includes a disc base 214, which is eccentrically mounted on the intermediate connecting column 22. A limiting column is fixed on the disc base 214, which is made of compressible friction rubber material. That is, when the limiting column of the first fixed plate 211 is limited to the outer surface of the shuttle shell 1, the rotation of the second rotating plate 212 causes the limiting column on the second rotating plate 212 to be limited to the outer surface of the shuttle shell 1. With the combined action of the intermediate connecting column 22, the shuttle shell 1 is stably limited and stably clamped.

[0026] In use, the central connecting post 22 enters the center position of the shuttle shell 1 and initially limits its movement. Then, the limiting post on the first fixing plate 211 directly restricts the shuttle shell 1 in the initial position. Therefore, two sets of clamping grooves are symmetrically arranged on the shuttle shell 1 to cooperate with the limiting post. At this time, the driving mechanism drives the second rotating plate 212 to rotate, so that the limiting post on the second rotating plate 212 gradually slides on the outer surface of the shuttle shell 1. At this time, the limiting post is in a compressed state until the limiting post on the second rotating plate 212 reaches the clamping position of the shuttle shell 1. Through the action of the clamping groove, the limiting post is rebounded, realizing the clamping and limiting function of the shuttle shell 1, which facilitates the transfer of the shuttle shell 1.

[0027] To achieve rotational adjustment of the second rotating plate 212, a drive motor 217 is fixedly installed on the clamping frame 23. The drive motor 217 drives the connecting gear 216. A rotating gear 215 is fixed on the second rotating plate 212, and the rotating gear 215 meshes with the connecting gear 216. Therefore, in use, the drive motor 217 drives the connecting gear 216 to rotate, thereby controlling the rotating gear 215 to rotate. This causes the second rotating plate 212 to rotate on the intermediate connecting post 22, thereby controlling the position of the upper limit post on the second rotating plate 212 and matching the position of the upper limit post on the second rotating plate 212 with the position of the shuttle shell 1.

[0028] To achieve positioning when clamping the shuttle 1, a central hole 213 is provided on the intermediate connecting post 22. A pressing post 2111 is slidably arranged inside the central hole 213. That is, an internal sliding hole 2110 for sliding the pressing post 2111 is connected to the central hole 213. An internal tray 218 is fixed to the end of the pressing post 2111, and a compression spring 219 is fixed to the side of the internal tray 218. The other end of the compression spring 219 is fixed to the intermediate connecting post 22. That is, the compression spring 219 is used to support the internal tray 218, so as to maintain the initial position of the internal tray 218. When the shuttle 1 is unloading, the internal tray 218 is used to achieve stable separation of the shuttle 1 and the clamping mechanism 2.

[0029] The installation mechanism 3 includes a limiting housing 31 for fixing the bobbin case 1. An internal rod 310 for centering the bobbin case 1 is slidably disposed inside the limiting housing 31. In other words, an inner sleeve 4 is provided in the middle of the bobbin case 1 in this application. The inner sleeve 4 can not only limit the installation of the bobbin, but also the length of the inner sleeve 4 is greater than the length of the bobbin, so that the inner sleeve 4 can enter the central hole 213. This allows the clamping mechanism 2 and the inner sleeve 4 to limit their positions, thereby ensuring that the center position of the bobbin case 1 is determined. The side of the inner sleeve 4 is also provided with an inner hole for cooperating with the internal rod 310. This inner hole allows the center positions of the bobbin case 1 and the installation mechanism 3 to coincide, thereby ensuring the accuracy of the bobbin case 1 installation.

[0030] As a further embodiment of this application, the inner rod 310 is slidably connected to the limiting housing 31, used to drive the rotating plate 32 and the bottommost end of the shuttle shell 1 to engage. Specifically, a mounting groove is provided at a fixed position at the bottom of the shuttle shell 1, and a rotating plate 32 is rotatably mounted on the inner rod 310 via a torsion spring. A clamping protrusion 38 is fixed on the rotating plate 32 for engaging with the mounting groove. In use, by sliding the inner sleeve 4 and the inner rod 310 until the shuttle shell 1 moves to the outermost edge of the limiting housing 31, the inner rod 310 is compressed, and the rotating plate 32 is compressed and rotated until the rotating plate 32 is tightly pressed against the limiting housing 31. At this point, the clamping protrusion 38 can enter the mounting groove position of the shuttle shell 1, thus enabling the shuttle shell 1 to engage with the mounting groove. The shuttle 1 is fixed in place, and a pressing platform 34 is fixed at the end of the internal rod 310. A roller base is fixed in the limiting housing 31, and a guide roller 36 is rotatably mounted on the roller base. The guide roller 36 is driven by a micro motor, and a traction rope 37 is wound on the guide roller 36. The other end of the traction rope 37 is fixed on the rotating plate 32. A mating platform 33 is fixed in place on the roller base, and the mating platform 33 and the pressing platform 34 are mated. A pressing spring 35 is installed between the pressing platform 34 and the limiting housing 31. The pressing spring 35 is a tension spring and is used to separate the pressing platform 34 and the mating platform 33. An internal limiting block 39 is fixed inside the limiting housing 31 for further fixing the shuttle 1.

[0031] When using the above technical solution, firstly, the inner sleeve 4 at the center of the shuttle case 1 is passed through the internal rod 310 until the shuttle case 1 and the internal rod 310 slide to their end. At this time, the shuttle case 1 contacts the rotating plate 32. Then, the shuttle case 1 is pressed further. At this time, the rotating plate 32 is pressed against the limiting housing 31. The angle of the rotating plate 32 is gradually adjusted so that the clamping protrusion 38 gradually rotates to the position of the mounting groove. This allows the clamping protrusion 38 to achieve the initial limiting function with the shuttle case 1. Then, the shuttle case 1 is rotated to a certain angle so that the protrusion position on the shuttle case 1 is limited by the internal limiting block 39, thereby achieving the fixed installation of the shuttle case 1. During this process, due to the compressive force of the compression spring 35, the internal rod 310 is pressed against the shuttle case 1, so that the shuttle case 1 bears the outward compressive force. The internal limiting block 39 limits the position of the shuttle case 1, thereby achieving the fixed installation of the shuttle case 1 and ensuring the accuracy of the installation position of the shuttle case 1.

[0032] When replacing the shuttle case 1, this application first rotates the shuttle case 1 initially, so that the protrusion of the shuttle case 1 is released and the position restriction of the internal limiting block 39 is released. Then, the spring plate 35 is squeezed to provide thrust, and at the same time, the micro motor drives the guide roller 35 to rotate, so as to realize the winding of the traction rope 37, thereby making the clamping protrusion 38 gradually move away from the shuttle case 1, and making the rotating plate 32 stably return to its original position, thereby realizing the removal of the shuttle case 1.

[0033] When the shuttle shell 1 is replaced, the present invention first rotates the shuttle shell 1 to release the protrusion and the position restriction of the internal limiting block 39. Then, the spring plate 35 is squeezed to provide thrust, and the guide roller 35 is rotated by the micro motor to achieve the winding of the traction rope 37. This causes the clamping protrusion 38 to gradually move away from the shuttle shell 1, and the rotating plate 32 to return to its original position stably, thereby removing the shuttle shell 1. Then, the shuttle shell 1 is installed. First, the inner sleeve 4 at the center of the shuttle shell 1 is passed through the inner rod 310 until the shuttle shell 1 and the inner rod 310 slide to the end. At this time, the shuttle shell 1 contacts the rotating plate 32. Then, the shuttle shell 1 is pressed. At this time, the rotating plate 32 is pressed against the limiting housing 31. The angle of the rotating plate 32 is gradually adjusted so that the clamping protrusion 38 gradually rotates to the position of the mounting groove. This allows the clamping protrusion 38 to achieve the initial limiting function with the shuttle shell 1. Then, the shuttle shell 1 is rotated to a certain angle so that the protrusion position on the shuttle shell 1 is limited by the internal limiting block 39, thereby achieving the fixed installation of the shuttle shell 1. During this process, due to the compression force of the compression spring 35, the inner rod 310 is pressed against the shuttle shell 1, so that the shuttle shell 1 bears the outward compression force. The internal limiting block 39 limits the position of the shuttle shell 1, thereby achieving the fixed installation of the shuttle shell 1 and ensuring the accuracy of the installation position of the shuttle shell 1. When the bobbin case 1 is clamped, the length of the inner sleeve 4 is greater than the length of the bobbin, allowing the inner sleeve 4 to enter the central hole 213. At this time, due to the action of the compression spring 219, the inner tray 218 bears a certain compressive force, but this compressive force is small, less than the clamping force applied to the bobbin case 1 by the first fixing plate 211 and the second rotating plate 212, which can limit the center position of the bobbin case 1. Subsequently, the limiting post on the first fixing plate 211 directly restricts the bobbin case 1 to the clamping groove in the initial position. Therefore, two symmetrically arranged posts are provided on the bobbin case 1. The clamping groove is used to cooperate with the limiting column. At this time, the drive mechanism drives the second rotating plate 212 to rotate, so that the limiting column on the second rotating plate 212 gradually slides on the outer surface of the shuttle shell 1. At this time, the shuttle shell 1 is positioned in the storage compartment to achieve the stability of the shuttle shell 1. At this time, the limiting column is in a compressed state until the limiting column on the second rotating plate 212 reaches the clamping position of the shuttle shell 1. The clamping groove causes the limiting column to spring back, realizing the clamping and limiting function of the shuttle shell 1, which facilitates the transfer of the shuttle shell 1.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An automatic shuttle changing device for a sewing machine, comprising a clamping mechanism (2) for clamping and limiting the shuttle case (1), characterized in that: The clamping mechanism (2) includes an intermediate connecting post (22) for limiting the center position of the shuttle shell (1), and a first fixing plate (211) for clamping and fixing the shuttle shell (1) is fixed on the side of the intermediate connecting post (22), and a second rotating plate (212) is rotatably arranged on the intermediate connecting post (22), and the second rotating plate (212) and the first fixing plate (211) are rotatable relative to each other.

2. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, The first fixed plate (211) and the second rotating plate (212) are respectively fixed with limiting columns for limiting the shuttle shell (1), and the limiting columns are made of friction rubber.

3. The automatic shuttle changing device for a sewing machine according to claim 2, characterized in that, The second rotating plate (212) has a rotating gear (215) fixed on its side, and a drive motor (217) is fixed on the intermediate connecting column (22). The drive motor (217) drives the connecting meshing teeth (216), and the meshing teeth (216) and the rotating gear (215) are meshed together.

4. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, The intermediate connecting post (22) is provided with a central hole (213) for cooperating with the inner sleeve (4) on the shuttle shell (1). An internal tray (218) for receiving and limiting the inner sleeve (4) is slidably arranged inside the central hole (213), and the internal tray (218) is spring-loaded.

5. The automatic shuttle changing device for a sewing machine according to claim 1, characterized in that, It also includes a limiting housing (31) for installation connection with the shuttle shell (1), the limiting housing (31) is provided with an internal rod (310) for cooperating with the inner sleeve (4) on the shuttle shell (1), and the limiting housing (31) is also provided with an internal limiting block (39) for limiting the outside of the shuttle shell (1).

6. An automatic shuttle changing device for a sewing machine according to claim 5, characterized in that, The internal rod (310) and the limiting housing (31) are slidably connected, and a pressing platform (34) is fixed at the end of the internal rod (310). A tension spring is provided between the pressing platform (34) and the limiting housing (31).

7. An automatic shuttle changing device for a sewing machine according to claim 6, characterized in that, A rotating plate (32) is rotatably mounted on the internal rod (310) via a torsion spring, and a clamping protrusion (38) for cooperating with the shuttle shell (1) is fixed at the end of the rotating plate (32).

8. An automatic shuttle changing device for a sewing machine according to claim 7, characterized in that, The limiting housing (31) has a guide roller (36) connected to its side via a micro motor. A traction rope (37) is wound around the guide roller (36), and the end of the traction rope (37) is fixedly mounted on the rotating plate (32).

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