A device for replacing the bobbin case with a core for a multi-station embroidery machine

Abstract

The present invention discloses a device for replacing the bobbin core of a multi-station embroidery machine, which is arranged on the back plate of the frame at the rotating shuttle station of the embroidery machine. The device includes a bobbin core grasping head respectively corresponding to each rotating shuttle station, a material changing driving device for driving the corresponding bobbin core grasping head to reciprocate up and down, a bobbin case holder capable of reciprocating left and right on the back plate, and a horizontal driving mechanism for driving the bobbin case holder to move left and right. The bobbin case holder is located on the back plate below the bobbin core grasping head, and is provided with a first station for accommodating an empty bobbin case and a second station for accommodating a full bobbin case. Each material changing driving device drives the corresponding bobbin core grasping head to reciprocate up and down between the rotating shuttle station and the bobbin case holder. When the bobbin core grasping head is successively located downward at the bobbin case holder, the horizontal driving mechanism drives the first station or the second station of the bobbin case holder to be respectively located at the position of the bobbin core grasping head. The present invention is suitable for being installed in a relatively small space and can quickly replace the bobbin cores of the bottom threads of the embroidery machines at each station.

Description

Technical Field

[0001] The present invention relates to a device for replacing a bobbin case with a core on a multi-station embroidery machine. Background Art

[0002] Multiple computer embroidery heads are simultaneously arranged on a multi-station embroidery machine to work simultaneously, greatly improving the production efficiency. With the development of domestic mechanical technology, the existing embroidery machines are getting longer, and the number of rotary shuttle stations on each machine is increasing and becoming denser. When each computer embroidery machine is working, it is necessary to timely replace the used bobbin case of the bottom thread from the rotary shuttle station. If not replaced in time, it will cause the embroidery machine to stop, thus restricting the further improvement of its production efficiency. For this reason, some automatic devices for automatically replacing the bobbin case of the bottom thread have emerged, including mechanisms such as a core grasping head, a driving mechanism, and a core storage disk. Among them, under the action of the driving mechanism, the core grasping head reciprocates between the rotary shuttle station of the embroidery machine and the core storage disk, grasps the used bobbin case and places it in the empty position in the bobbin case storage disk, then grasps a new bobbin case from the adjacent station of the bobbin case storage disk, and reciprocates to place it at the rotary shuttle station of the bottom thread core of the embroidery machine to complete the operation of automatically replacing the bobbin case of the bottom thread. However, since a plurality of accommodating spaces for the bobbin cases filled with threads need to be provided on the core storage disk, the volume is large. When it is arranged between two adjacent stations of the embroidery machine, sufficient installation space and maintenance space are required, resulting in an increase in the interval between two adjacent stations of the embroidery machine. In the same space, the number of stations of the embroidery machine is reduced instead, restricting the improvement of the overall efficiency from the hardware aspect. And several motors need to cooperate to work at each station. With the increasing trend of the number of stations of the embroidery machine, it needs to increase exponentially. This increases the use and later maintenance costs. Summary of the Invention

[0003] The purpose of the present invention is to provide a core replacement device for a multi-station embroidery machine, which is small in volume, convenient to operate, suitable for being installed in a relatively small space, and can automatically replace the bobbin case of the bottom thread.

[0004] The technical solution of the present invention is: a core replacement device for a multi-station embroidery machine, which is arranged on the back plate of the frame of the rotary shuttle station of the embroidery machine, and includes a core grasping head respectively corresponding to each of the rotary shuttle stations, a material replacement driving device for driving the corresponding core grasping head to reciprocate up and down, a bobbin case rack that can reciprocate left and right on the back plate, and a horizontal driving mechanism for driving the bobbin case rack to move left and right. Among them, the bobbin case rack is located on the back plate below the core grasping head, and is provided with a first station for accommodating empty bobbin cases and a second station for accommodating full bobbin cases. Each material replacement driving device drives the corresponding core grasping head to reciprocate up and down between the rotary shuttle station and the bobbin case rack. When the core grasping head is sequentially located downward at the bobbin case rack, the horizontal driving mechanism drives the first station or the second station of the bobbin case rack to be respectively located at the position of the core grasping head.

[0005] The core gripper can grab an empty core from an embroidery machine or put a full-core into the embroidery machine, and realizes reciprocating up and down movement through a material-changing driving device. A first working position and a second working position are provided on the bobbin case holder, and it moves left and right through a horizontal driving mechanism, cooperating with the core gripper to place an empty core at the first working position, grab a full core from the second working position and send it into the embroidery machine. The core gripper only makes up and down movement on the installation vertical plane, and the bobbin case holder makes horizontal reciprocating movement between the first working position and the second working position. The interval between the two working positions is the same as the width of the core gripper, thus reducing the space occupied by the core replacement device as a whole, and correspondingly increasing the number of working positions set for the embroidery machine, ensuring the improvement of the overall efficiency of the embroidery machine from the hardware aspect.

[0006] A sliding frame that can reciprocate left and right is provided on the back plate at the lower part of the bobbin case holder, as well as a bobbin case bed plate, a feeding core gripper, a feeding driving mechanism for driving the feeding core gripper to reciprocate up and down, a second horizontal driving mechanism for driving the sliding frame to move left and right, and a third horizontal driving mechanism for driving the feeding driving mechanism to move left and right are arranged on the sliding frame. Among them, a number of third working position groups for accommodating empty core bobbins and a number of fourth working position groups for accommodating full core bobbins are respectively provided on the bobbin case bed plate. The feeding driving mechanism drives the feeding core gripper to make reciprocating up and down movement between the bobbin case holder and the bobbin case bed plate. When the feeding core gripper moves downward to the bobbin case bed plate, the third horizontal driving mechanism drives the feeding driving mechanism to move horizontally so that the feeding core gripper is located at the third working position group or the fourth working position group on the bobbin case bed plate. When the feeding core gripper moves upward, the second horizontal driving mechanism drives the sliding frame so that the feeding core gripper is respectively located at the first working position or the second working position of the bobbin case holder corresponding to different working position embroidery machines. The feeding core gripper can take down an empty core bobbin from the first working position, put it into the third working position group, and take out a full core bobbin from the fourth working position group and put it into the second working position, thus realizing the operation of placing the full core bobbin on the bobbin case holder and placing the empty core bobbin on the bobbin case bed plate on the bobbin case holder. One bobbin case bed plate can simultaneously satisfy the fourth working position group for providing full core bobbins for the bobbin case holders corresponding to a certain number of working position embroidery machines and the third working position group for accommodating empty core bobbins. When the number of working positions on one bobbin case bed plate cannot meet the requirements of the rotary hook working positions of each working position embroidery machine, more sliding frames and bobbin case bed plates arranged on the sliding frames, feeding driving mechanisms and feeding core grippers can be added on the back plate until the working positions on each set bobbin case bed plate meet the use of the rotary hook working positions of each working position embroidery machine. When all the full core bobbins on the bobbin case bed plate are placed on the bobbin case holder and all the empty core bobbins on the bobbin case holder are placed on the bobbin case bed plate, the whole feeding process is completed, and the operator can quickly replace the whole bobbin case bed plate. The embroidery machine works normally during the whole feeding process, further improving the overall efficiency.

[0007] The described material changing driving device includes a first driving shaft, a second driving shaft, and a third driving shaft that are arranged parallel to each other vertically and located below the bobbin case holder, as well as a first lower connecting rod and a first upper connecting rod, a second lower connecting rod and a second upper connecting rod, and a third lower connecting rod and a third upper connecting rod that are sequentially hinged. The free end of the first lower connecting rod is sleeved on the first driving shaft, the free end of the second lower connecting rod is sleeved on the second driving shaft, the free end of the third lower connecting rod is sleeved on the third driving shaft, the free end of the first upper connecting rod is hinged on one side wall of the core gripping head, and the free ends of the second upper connecting rod and the third upper connecting rod are coaxially hinged on the opposite side wall of the core gripping head. The material changing driving device adopts a three-link mechanism, which has a simple structure and reliable use. By arranging three upper connecting rods to be respectively hinged on both sides of the core gripping head, it can ensure that when the core gripping head reciprocates up and down, the plane where it is located does not deflect all the time, ensuring the stability and accuracy of gripping and placing the core.

[0008] A guide rail is provided on the back plate, and a rack is provided in the guide rail. The horizontal driving mechanism includes a slider, a gear, and a driving motor for driving the gear, which are arranged on the bobbin case holder. The slider is arranged in the guide rail, and the gear meshes with the rack. By driving the gear to rotate, the slider slides in the guide rail, thereby driving the bobbin case holder to perform a horizontal reciprocating motion on the back plate. The implementation method is simple and the operation is controllable.

[0009] A guide rail mounting base is provided on the back plate, and a second guide rail and a second rack are provided on the guide rail mounting base. The second horizontal driving mechanism includes a second slider, a second gear, and a second driving motor arranged on the sliding frame. The second slider is located in the second guide rail, and the second gear meshes with the second rack. By driving the second gear to rotate, the second slider slides in the second guide rail, thereby driving the sliding frame to perform a horizontal reciprocating motion on the back plate. The implementation method is simple and the operation is controllable.

[0010] A third guide rail and a third rack are provided on the sliding frame. The feeding driving mechanism is arranged on the sliding seat. A third slider, a third gear, and a third driving motor are provided on the sliding seat. The third slider is located in the third guide rail, and the third gear meshes with the third rack. By driving the third gear to rotate, the horizontal movement control of the feeding driving mechanism on the sliding frame is realized, which is convenient to implement and the operation is reliable.

[0011] Parallel power supply belts are provided on the guide rail mounting base. A conductor electrically connected to the second driving motor and the third driving motor is provided on the third slider, and the conductor is in sliding contact with the power supply belt. Through the contact and cooperation between the conductor and the power supply belt, the power supply to the second driving motor and the third driving motor is realized. The setting of on-site power lines is reduced, and the movement efficiency is effectively improved.

[0012] The feeding driving mechanism described above includes a fourth driving shaft, a fifth driving shaft, and a sixth driving shaft that are arranged parallel to each other vertically on the sliding frame, as well as a fourth lower connecting rod and a fourth upper connecting rod, a fifth lower connecting rod and a fifth upper connecting rod, and a sixth lower connecting rod and a sixth upper connecting rod that are sequentially hinged. The free end of the fourth lower connecting rod is sleeved on the fourth driving shaft, the free end of the fifth lower connecting rod is sleeved on the fifth driving shaft, the free end of the sixth lower connecting rod is sleeved on the sixth driving shaft, the free end of the fourth upper connecting rod is hinged to one side wall of the feeding core gripper, and the free ends of the fifth upper connecting rod and the sixth upper connecting rod are coaxially hinged to the opposite side wall of the feeding core gripper. The feeding drive is realized through a three-link mechanism, with a simple structure and reliable use. By adopting the method of arranging three upper connecting rods to be respectively hinged on both sides of the feeding core gripper, it can ensure that when the feeding core gripper reciprocates up and down, the plane where it is located does not deflect all the time, ensuring the stability and accuracy of gripping and placing the core.

[0013] The bobbin case bedplate is movably arranged on the sliding frame. It can be conveniently and quickly replaced, facilitating the quick setting of the core bobbin case at the working station.

[0014] On the sliding frame, a protruding part is provided at the lower part and elastic piece parts are provided on both sides. The bobbin case bedplate is movably arranged in the space surrounded by the protruding part and the elastic piece parts. The elastic piece parts can be stuck on both sides of the bobbin case bedplate, and the protruding part supports the bottom of the bobbin case bedplate, movably arranging the bobbin case bedplate on the sliding frame for convenient replacement.

[0015] The advantages of the present invention are: small volume, convenient operation, suitable for being installed in a relatively small space, and can conveniently replace the bobbin cores of the embroidery machines at each working station. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Appendix Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0017] Appendix Figure 2 is a side view structural diagram of an embodiment of the present invention;

[0018] Appendix Figure 3 is the material changing driving device in an embodiment of the present invention;

[0019] Appendix Figure 4 is a schematic structural diagram of the feeding driving device in an embodiment of the present invention;

[0020] Appendix Figure 5 is a side view structural schematic diagram of the feeding driving device in an embodiment of the present invention;

[0021] 1. Backplate, 2. Wire core gripping head, 3. Bobbin case holder, 4. First station, 5. Second station, 6. Bobbin case bedplate, 7. Feeding wire core gripping head, 8. Third station group, 9. Fourth station group, 10. First drive shaft, 11. Second drive shaft, 12. Third drive shaft, 13. First upper connecting rod, 14. First lower connecting rod, 15. Second upper connecting rod, 16. Second lower connecting rod, 17. Third upper connecting rod, 18. Third lower connecting rod, 19. Fourth drive shaft, 20. Fifth drive shaft, 21. Sixth drive shaft, 22. Fourth upper connecting rod, 23. Fourth lower connecting rod, 24. Fifth upper connecting rod, 25. Fifth lower connecting rod, 26. Sixth upper connecting rod, 27. Sixth lower connecting rod, 28. Guide rail, 29. Rack, 30. Slide block, 31. Gear, 32. Drive motor, 33. Second guide rail, 34. Second rack, 35. Second slide block, 36. Second gear, 37. Second drive motor, 38. Third guide rail, 39. Third rack, 40. Sliding seat, 41. Third slide block, 42. Third gear, 43. Third drive motor, 44. Power supply belt, 45. Conductor, 46. Rotating shuttle station, 47. Sliding frame, 48. Wire core bobbin case, 49. Protrusion, 50. Elastic piece part, 51. Guide rail mounting base. Detailed implementation manner

[0022] Example:

[0023] Refer to Figures 1-5, A device for replacing the thread core of a multi-station embroidery machine, which is arranged on the frame backboard 1 behind the rotary hook station 46 of the embroidery machine. It includes a thread core grabbing head 2 respectively corresponding to each rotary hook station 46, a material changing driving device for driving the corresponding thread core grabbing head 2 to reciprocate up and down, a bobbin case holder 3 that can slide left and right reciprocally on the backboard 1, and a horizontal driving mechanism for driving the bobbin case holder 3 to move left and right. Among them, the bobbin case holder 3 is on the backboard 1 below the thread core grabbing head 2, and it is provided with a first station 4 for accommodating an empty bobbin case 48 and a second station 5 for accommodating a full bobbin case 48. Each material changing driving device drives the corresponding thread core grabbing head 2 to reciprocate up and down between the rotary hook station 46 and the bobbin case holder 3. When the thread core grabbing head 2 is sequentially located downward at the bobbin case holder 3, the horizontal driving mechanism drives the first station 4 or the second station 5 of the bobbin case holder 3 to be respectively located at the position of the thread core grabbing head 2. A guide rail 28 is provided on the backboard 1, and a rack 29 is provided in the guide rail 28. The horizontal driving mechanism includes a slider 30, a gear 31 and a driving motor 32 for driving the gear 31, which are arranged on the bobbin case holder 3. Among them, the slider 30 is arranged in the guide rail 28, and the gear 31 meshes with the rack 29. The material changing driving device includes a first driving shaft 10, a second driving shaft 11 and a third driving shaft 12 that are arranged parallel to each other up and down below the bobbin case holder 3, and a first lower connecting rod 14 and a first upper connecting rod 13, a second lower connecting rod 16 and a second upper connecting rod 15, a third lower connecting rod 18 and a third upper connecting rod 17 that are sequentially hinged. Among them, the free end of the first lower connecting rod 14 is sleeved on the first driving shaft 10, the free end of the second lower connecting rod 16 is sleeved on the second driving shaft 11, the free end of the third lower connecting rod 18 is sleeved on the third driving shaft 12, the free end of the first upper connecting rod 13 is hinged on one side wall of the thread core grabbing head 2, and the free ends of the second upper connecting rod 15 and the third upper connecting rod 17 are coaxially hinged on the opposite side wall of the thread core grabbing head 2.

[0024] The core gripper 2 can grab an empty core bobbin case 48 from an embroidery machine or place a full-core bobbin case 48 into the embroidery machine. It realizes reciprocating up and down movement through a material-changing driving device. There are a first working position 4 and a second working position 5 on the bobbin case holder 3. The driving motor 32 drives the gear 31 to rotate on the rack 29 to generate left and right displacement. The slider 30 can slide left and right along the guide rail 28, driving the bobbin case holder 3 to move horizontally left and right on the back plate 1. Cooperating with the core gripper, it realizes placing the empty core bobbin case 48 grabbed from the rotating hook working position 46 at the first working position 4, or grabbing the full-core bobbin case 48 from the second working position 5 and feeding it into the rotating hook working position 46 of the embroidery machine. The core gripper 2 only makes up and down movement on the installation vertical plane, and the bobbin case holder 3 also only makes horizontal reciprocating movement between the first working position 4 and the second working position 5. The interval between the two working positions is the same as the overall width of the core gripper, thus reducing the space occupied by the core replacement device as a whole, and correspondingly increasing the number of working positions set for the embroidery machine, ensuring the improvement of the overall efficiency of the embroidery machine from the hardware. The material-changing driving device adopts a three-link mechanism, with a simple structure and reliable use. By arranging three upper link rods to be respectively hinged on both sides of the core gripper, it can ensure that when the core gripper makes reciprocating up and down movement, the plane where it is located does not deflect all the time, ensuring the stability and accuracy of grabbing and placing the core.

[0025] On the back plate 1 at the lower part of the bobbin case holder 2, there is a sliding frame 47 that can move horizontally reciprocally, a bobbin case bed plate 6 movably arranged on the sliding frame 47, a feeding core gripper 7, a feeding driving mechanism for driving the feeding core gripper 7 to make reciprocating up and down movement, a second horizontal driving mechanism for driving the sliding frame 47 to move left and right reciprocally, and a third horizontal driving mechanism for driving the sliding seat 40 to move left and right reciprocally. Among them, there are several third working position groups 8 for accommodating empty core bobbin cases 48 and several fourth working position groups 9 for accommodating full-core bobbin cases 48 respectively on the bobbin case bed plate 6. The feeding driving mechanism drives the feeding core gripper 7 to make reciprocating up and down movement between the first working position 4 and the third working position group 8, and between the second working position 5 and the fourth working position group 9. When the feeding core gripper 7 moves downward to the third working position group 8 or the fourth working position group 9, the second horizontal driving mechanism drives the sliding frame 47 to make the bobbin case bed plate move horizontally to the lower part of the bobbin case holder to be worked. The third horizontal driving mechanism drives the feeding driving mechanism on the sliding seat 40 to make the feeding core gripper 7 be located at the first working position 4 or the second working position 5 respectively.

[0026] The feeding core gripping head 7 can remove the empty core bobbin case 48 from the first station 4, place it into the third station group 8, and take out the full core bobbin case 48 from the fourth station group 9 and place it into the second station 5, so as to further replace the core bobbin case. When there is no empty space in the third station group 8 or there is no full core bobbin case in the fourth station group 9, manual quick replacement can be carried out. Moreover, the sliding frame 47 drives the bobbin case bed plate 6 to move horizontally back and forth behind the back plate 1 of the embroidery machine. Using one bobbin case bed plate can take into account the core replacement on multiple bobbin holders, further improving the overall efficiency.

[0027] A guide rail mounting base 51 is provided on the back plate 1. A second guide rail 33 and a second rack 34 are provided on the guide rail mounting base 51. The second horizontal drive structure includes a second slider 35, a second gear 36 and a second drive motor 37 provided on the sliding frame 47. Among them, the second slider 35 is located in the second guide rail 33, and the second gear 36 meshes with the second rack 34. By driving the second gear 36 to rotate, the sliding of the second slider 35 in the second guide rail 33 is realized, thereby driving the horizontal reciprocating movement of the sliding frame 47 on the back plate 1. The implementation method is simple and the operation is controllable.

[0028] A third guide rail 38 and a third rack 39 are provided on the sliding frame 47. The feeding drive mechanism is arranged on the sliding seat 40. A third slider 41, a third gear 42 and a third drive motor 43 are provided on the sliding seat 40. Among them, the third slider 41 is located in the third guide rail 38, and the third gear 42 meshes with the third rack 39. By driving the rotation of the third gear 42, the horizontal movement control of the feeding drive mechanism on the bobbin bottom plate is realized. The realization is convenient and the operation is reliable.

[0029] Parallel power supply belts 44 are provided on the guide rail mounting base 51. A conductor 45 electrically connected to the second drive motor 37 and the third drive motor 43 is provided on the third slider 41. The conductor 45 is in sliding contact with the power supply belt 44. Through the cooperation of the conductor 45 and the power supply belt 44, the power supply to the second drive motor 37 and the third drive motor 43 is realized, reducing the setting of on-site power lines and effectively improving the movement efficiency.

[0030] The feeding driving mechanism described above includes a fourth driving shaft 19, a fifth driving shaft 20, and a sixth driving shaft 21 that are arranged parallel to each other vertically and are disposed below the sliding carriage 47, as well as a fourth lower connecting rod 23 and a fourth upper connecting rod 22, a fifth lower connecting rod 25 and a fifth upper connecting rod 24, and a sixth lower connecting rod 27 and a sixth upper connecting rod 26 that are sequentially hinged. The free end of the fourth lower connecting rod 23 is sleeved on the fourth driving shaft 19, the free end of the fifth lower connecting rod 25 is sleeved on the fifth driving shaft 20, the free end of the sixth lower connecting rod 27 is sleeved on the sixth driving shaft 21, the free end of the fourth upper connecting rod 22 is hinged to one side wall of the feeding core gripper 7, and the free ends of the fifth upper connecting rod 24 and the sixth upper connecting rod 26 are coaxially hinged to the opposite side wall of the feeding core gripper 7. The feeding drive is achieved through a three-link mechanism, which has a simple structure and reliable use. By arranging three upper connecting rods to be respectively hinged on both sides of the feeding core gripper 7, it can ensure that when the feeding core gripper moves up and down reciprocally, the plane where it is located does not deflect, ensuring the stability and accuracy of gripping and placing the core.

[0031] The bobbin bed plate 6 is movably arranged on the sliding carriage 47. On the sliding carriage 47, there are respectively a protruding portion 49 located at the lower part and elastic sheet portions 50 located on both sides. The bobbin bed plate 6 is movably arranged in the space surrounded by the protruding portion 49 and the elastic sheet portions 50. The elastic sheet portions 50 can be stuck on both sides of the bobbin bed plate 6, and the protruding portion 49 supports the bottom of the bobbin bed plate 6. Movably arranging the bobbin bed plate 6 on the sliding carriage 47 can quickly remove the bobbin bed plate 6 that is full of empty bobbin cases 48 in the third working station group 8 or does not have a full bobbin case 48 in the fourth working group 9, and replace it with a pre-prepared new bobbin bed plate 6, which is convenient for quickly setting the bobbin case on the working station and avoiding the idling or shutdown of the equipment caused by waiting.

[0032] The above detailed description is a specific description of the feasible embodiments of the present invention. This embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification without departing from the present invention shall be included in the patent scope of this case.

Claims

1. A device for replacing the bobbin case of a multi-station embroidery machine, which is arranged on the back plate of the frame at the rotating shuttle station of the embroidery machine, and is characterized in that: It includes a core gripping head respectively corresponding to and arranged under each rotating shuttle station, a material changing driving device for driving the corresponding core gripping head to reciprocate up and down, a bobbin case holder capable of reciprocating left and right on the back plate, and a horizontal driving mechanism for driving the bobbin case holder to move left and right. The bobbin case holder is located on the back plate under the core gripping head, and is provided with a first station for accommodating an empty bobbin case and a second station for accommodating a full bobbin case. Each material changing driving device drives the corresponding core gripping head to reciprocate up and down between the rotating shuttle station and the bobbin case holder. When the core gripping head is sequentially located downward at the bobbin case holder, the horizontal driving mechanism drives the first station or the second station of the bobbin case holder to be respectively located at the position of the core gripping head. On the back plate under the lower part of the bobbin case holder, there is a sliding rack capable of reciprocating left and right, and a bobbin case bed plate, a feeding core gripping head, a feeding driving mechanism for driving the feeding core gripping head to reciprocate up and down, a second horizontal driving mechanism for driving the sliding rack to move left and right, and a third horizontal driving mechanism for driving the feeding driving mechanism to move left and right are arranged on the sliding rack. A plurality of third station groups for accommodating empty bobbin cases and a plurality of fourth station groups for accommodating full bobbin cases are respectively arranged on the bobbin case bed plate. The feeding driving mechanism drives the feeding core gripping head to reciprocate up and down between the bobbin case holder and the bobbin case bed plate. When the feeding core gripping head moves downward to the bobbin case bed plate, the third horizontal driving mechanism drives the feeding driving mechanism to move horizontally to make the feeding core gripping head located at the third station group or the fourth station group on the bobbin case bed plate. When the feeding core gripping head moves upward, the second horizontal driving mechanism drives the sliding rack to make the feeding core gripping head respectively located at the first station or the second station of the corresponding bobbin case holder of different station embroidery machines.

2. The thread core replacing bobbin case device for a multi-station embroidery machine according to claim 1, characterized in that: The material changing driving device includes a first driving shaft, a second driving shaft and a third driving shaft which are arranged in parallel up and down under the bobbin case holder, and a first lower connecting rod and a first upper connecting rod, a second lower connecting rod and a second upper connecting rod, a third lower connecting rod and a third upper connecting rod which are sequentially hinged. The free end of the first lower connecting rod is sleeved on the first driving shaft, the free end of the second lower connecting rod is sleeved on the second driving shaft, the free end of the third lower connecting rod is sleeved on the third driving shaft, the free end of the first upper connecting rod is hinged on one side wall of the core gripping head, and the free ends of the second upper connecting rod and the third upper connecting rod are coaxially hinged on the opposite side wall of the core gripping head.

3. The thread core replacement bobbin case device for a multi-station embroidery machine according to claim 2, characterized in that: A guide rail is arranged on the back plate, and a rack is arranged in the guide rail. The horizontal driving mechanism includes a slider, a gear and a driving motor for driving the gear which are arranged on the bobbin case holder. The slider is arranged in the guide rail, and the gear meshes with the rack.

4. The device for replacing the bobbin case of a multi-station embroidery machine according to claim 3, wherein: A guide rail mounting base is arranged on the back plate, and a second guide rail and a second rack are arranged on the guide rail mounting base. The second horizontal driving mechanism includes a second slider, a second gear and a second driving motor which are arranged on the sliding rack. The second slider is located in the second guide rail, and the second gear meshes with the second rack.

5. A core replacement bobbin case device for a multi-station embroidery machine according to claim 4, characterized in that: A third guide rail and a third rack are provided on the sliding carriage. The third horizontal driving mechanism includes a sliding seat provided on the sliding carriage, and a third slider, a third gear and a third driving motor provided on the sliding seat. The third slider is located within the third guide rail, the third gear meshes with the third rack, and the loading driving mechanism is provided on the sliding seat.

6. The core-changing bobbin case device for a multi-station embroidery machine according to claim 5, characterized in that: A parallel power supply belt is provided on the guide rail mounting base, and a conductor electrically connected to the second driving motor and the third driving motor is provided on the third slider. The conductor is in sliding contact with the power supply belt.

7. A core replacement bobbin case device for a multi-station embroidery machine according to claim 2 or 3 or 4 or 5 or 6, characterized in that: The loading driving mechanism includes a fourth driving shaft, a fifth driving shaft and a sixth driving shaft which are arranged vertically and parallel to each other on the sliding carriage, and a fourth lower connecting rod and a fourth upper connecting rod, a fifth lower connecting rod and a fifth upper connecting rod, and a sixth lower connecting rod and a sixth upper connecting rod which are sequentially hinged. The free end of the fourth lower connecting rod is sleeved on the fourth driving shaft, the free end of the fifth lower connecting rod is sleeved on the fifth driving shaft, the free end of the sixth lower connecting rod is sleeved on the sixth driving shaft, the free end of the fourth upper connecting rod is hinged to one side wall of the loading wire core gripper, and the free ends of the fifth upper connecting rod and the sixth upper connecting rod are coaxially hinged to the opposite side wall of the loading wire core gripper.

8. The device for replacing the core of the bobbin case for a multi-station embroidery machine according to claim 7, characterized in that: The bobbin bed plate is movably arranged on the sliding carriage.

9. The core-changing bobbin case device for a multi-station embroidery machine according to claim 8, characterized in that: A protruding portion is provided at the lower part of the sliding carriage, and elastic piece portions are provided on both sides. The bobbin bed plate is movably arranged within the space enclosed by the protruding portion and the elastic piece portions.

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