Overlock machine adjustment device and overlock machine

Abstract

The application relates to the sewing technical field, in particular to a overlock machine adjusting device and an overlock machine. The overlock machine adjusting device comprises a driving assembly, the driving assembly comprises a driving piece, a driving shaft, a tooth adjusting fixing part, a tooth adjusting self-locking piece, a tooth adjusting cam and a tooth adjusting mounting seat. The tooth adjusting self-locking piece is fixedly installed on the tooth adjusting fixing part, the tooth adjusting cam is connected with the tooth adjusting self-locking piece in a matched mode and can rotate relative to the tooth adjusting self-locking piece along a first preset direction. The tooth adjusting mounting seat is fixedly connected with the driving shaft, and a first abutting part is arranged on the tooth adjusting mounting seat, a first matched part is arranged on the tooth adjusting cam, when the driving shaft drives the tooth adjusting mounting seat to rotate by a preset angle along the first preset direction, the first abutting part can abut against the first matched part, so that the driving shaft can drive the tooth adjusting cam to synchronously rotate. The overlock machine adjusting device and the overlock machine provided by the application solve the problem of insufficient positioning precision when a single motor is used to realize multifunctional adjustment of the existing overlock machine.

Description

Technical Field

[0001] This application relates to the field of sewing technology, and in particular to an overlock sewing machine adjustment device and an overlock sewing machine. Background Technology

[0002] Overlock sewing machines are currently the main overlock equipment in the sewing industry. In the actual sewing process, it is necessary to frequently cut threads and lift presser feet. In addition, different sewing process configurations are required for different fabrics. That is, different fabrics have different requirements for differential ratio and tooth height due to different fabric feed amplitudes.

[0003] In related technologies, some overlock sewing machines employ a single-motor drive system, where a single motor is used to adjust functions such as thread cutting, presser foot lifting, differential ratio, and tooth height, greatly improving operational efficiency. However, some functions often cannot be precisely positioned during adjustment, reducing adjustment efficiency. Utility Model Content

[0004] Therefore, it is necessary to provide an adjustment device and an overlock sewing machine to solve the problem of insufficient positioning accuracy when using a single motor to achieve multi-functional adjustment in existing overlock sewing machines.

[0005] This application provides an adjustment device for an overlock sewing machine. The device includes a drive assembly, a thread-cutting assembly, a presser foot lifting assembly, a tooth height adjustment assembly, and a differential ratio adjustment assembly. The thread-cutting assembly, presser foot lifting assembly, tooth height adjustment assembly, and differential ratio adjustment assembly are all driven and cooperate with the drive assembly, and can cut the thread, lift the presser foot, adjust the tooth height, and adjust the differential ratio under the drive assembly. The drive assembly includes a drive component, a drive shaft, a tooth-adjusting fixing part, a tooth-adjusting self-locking part, a tooth-adjusting cam, and a tooth-adjusting mounting base. One end of the drive shaft is connected to the drive component, and the other end passes through the tooth-adjusting fixing part, the tooth-adjusting self-locking part, the tooth-adjusting cam, and the tooth-adjusting mounting base. The tooth adjustment mounting base is described above; the tooth adjustment self-locking component is fixedly mounted on the tooth adjustment fixing part, the tooth adjustment cam is connected to the tooth adjustment self-locking component and can rotate relative to the tooth adjustment self-locking component in a first preset direction; the tooth adjustment mounting base is fixedly connected to the drive shaft, and the tooth adjustment mounting base is provided with a first abutting part, and the tooth adjustment cam is provided with a first mating part. When the drive shaft drives the tooth adjustment mounting base to rotate a preset angle in the first preset direction, the first abutting part can abut against the first mating part, so that the drive shaft can drive the tooth adjustment cam to rotate synchronously; wherein, the tooth adjustment cam is used to drive the tooth height adjustment component.

[0006] In one embodiment, the tooth-adjusting mounting base is provided with a first rotating shaft and a first elastic element. The first abutment portion is rotatably engaged with the first rotating shaft, and the two ends of the first elastic element are respectively connected to the first abutment portion and the tooth-adjusting mounting base. When the first abutment portion rotates relative to the first rotating shaft in the first preset direction, the first elastic element has a tendency to push the first abutment portion to rotate and reset.

[0007] In one embodiment, the tooth-adjusting mounting base is further provided with a first limiting part, which is spaced apart from the first rotating shaft; when the first abutting part abuts and engages with the first mating part, the first limiting part can stop the first abutting part on the side away from the first mating part.

[0008] In one embodiment, the drive assembly further includes a differential ratio fixing part, a differential ratio self-locking member, a differential ratio cam, and a differential ratio mounting seat. One end of the drive shaft is connected to the drive member, and the other end passes through the differential ratio fixing part, the differential ratio self-locking member, the differential ratio cam, and the differential ratio mounting seat. The differential ratio self-locking member is fixedly mounted on the differential ratio fixing part. The differential ratio cam is engaged with the differential ratio self-locking member and can rotate relative to the differential ratio self-locking member in a second preset direction. The differential ratio mounting seat is fixedly connected to the drive shaft, and the differential ratio mounting seat has a second abutment part, and the differential ratio cam has a second mating part. When the drive shaft drives the differential ratio mounting seat to rotate a preset angle in the second preset direction, the second abutment part can abut against the second mating part, so that the drive shaft can drive the differential ratio cam to rotate synchronously. The differential ratio cam is used to drive the differential ratio adjustment assembly, and the second preset direction is opposite to the first preset direction.

[0009] In one embodiment, the differential ratio mounting base is provided with a second rotating shaft and a second elastic element. The second abutment portion is rotatably engaged with the second rotating shaft. The two ends of the second elastic element are respectively connected to the second abutment portion and the differential ratio mounting base. When the second abutment portion rotates relative to the second rotating shaft in the second preset direction, the second elastic element has a tendency to push the second abutment portion to rotate and reset.

[0010] In one embodiment, the differential ratio mounting base is further provided with a second limiting part, which is spaced apart from the second rotating shaft; when the second abutting part abuts and engages with the second mating part, the second limiting part can stop the second abutting part on the side away from the second mating part.

[0011] In one embodiment, the tooth-adjusting self-locking element is configured as a one-way bearing or a ratchet; and / or, the differential ratio self-locking element is configured as a one-way bearing or a ratchet.

[0012] In one embodiment, the tooth-adjusting mounting base is provided with a wire-cutting cam, which is used to drive and cooperate with the wire-cutting assembly.

[0013] In one embodiment, the tooth-adjusting mounting base is provided with a lifting foot cam, which is used to drive and cooperate with the lifting foot assembly.

[0014] This application also provides an adjustment device for an overlock sewing machine, which includes a drive assembly, a thread-cutting assembly, a presser foot lifting assembly, a tooth height adjustment assembly, and a differential ratio adjustment assembly. The thread-cutting assembly, presser foot lifting assembly, tooth height adjustment assembly, and differential ratio adjustment assembly are all driven and cooperate with the drive assembly, and can cut the thread, lift the presser foot, adjust the tooth height, and adjust the differential ratio under the drive assembly. The drive assembly includes a drive component, a drive shaft, a differential ratio fixing part, a differential ratio self-locking part, a differential ratio cam, and a differential ratio mounting base. One end of the drive shaft is connected to the drive component, and the other end passes through the differential ratio fixing part and the differential ratio self-locking part. The system comprises a differential ratio cam and a differential ratio mounting base; the differential ratio self-locking component is fixedly mounted on the differential ratio fixing part, the differential ratio cam is connected to the differential ratio self-locking component and can rotate relative to the differential ratio self-locking component in a second preset direction; the differential ratio mounting base is fixedly connected to the drive shaft, wherein the differential ratio mounting base is provided with a second abutment part, and the differential ratio cam is provided with a second mating part. When the drive shaft drives the differential ratio mounting base to rotate a preset angle in the second preset direction, the second abutment part can abut against the second mating part, so that the drive shaft can drive the differential ratio cam to rotate synchronously.

[0015] This application also provides an overlock sewing machine, which includes the overlock sewing machine adjustment device described in any of the above embodiments.

[0016] Compared with the prior art, the overlock sewing machine adjustment device and overlock sewing machine provided in this application, by setting a self-locking tooth adjusting component, can ensure that the tooth adjusting cam can only rotate relative to the self-locking tooth adjusting component in a first preset direction, and cannot reverse. Thus, when the drive shaft drives the tooth adjusting cam to rotate through the tooth adjusting mounting seat, the first abutment part, and the first mating part, it is only necessary to control the drive shaft to rotate by the corresponding angle and then stop, which can fix the relative position of the tooth adjusting cam and the tooth height adjustment component, thereby locking the tooth height parameter and effectively improving positioning accuracy and adjustment efficiency. Attached Figure Description

[0017] 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.

[0018] Figure 1 An installation schematic diagram of an overlock sewing machine adjustment device according to an embodiment of this application;

[0019] Figure 2 A schematic diagram of the structure of an overlock sewing machine adjustment device according to an embodiment of this application;

[0020] Figure 3 A cross-sectional view of a driving component according to an embodiment provided in this application;

[0021] Figure 4 A schematic diagram illustrating the cooperation between a drive assembly and a tooth height adjustment assembly according to an embodiment of this application;

[0022] Figure 5 An exploded view of the engagement of a drive assembly and a tooth height adjustment assembly according to an embodiment provided in this application;

[0023] Figure 6 A schematic diagram illustrating the cooperation between a drive component and a differential ratio adjustment component according to an embodiment of this application;

[0024] Figure 7 An exploded view of the engagement of a drive assembly and a differential ratio adjustment assembly according to an embodiment provided in this application;

[0025] Figure 8 A schematic diagram illustrating the interaction between a drive assembly and a wire-cutting assembly according to an embodiment of this application;

[0026] Figure 9 This is a schematic diagram illustrating the cooperation between the drive assembly and the pressure foot assembly in one embodiment of this application.

[0027] The symbols in the diagram represent the following meanings:

[0028] 100. Overlock sewing machine adjusting device; 10. Drive assembly; 11. Drive component; 111. Drive shaft; 12. Gear adjusting fixing part; 13. Gear adjusting self-locking component; 14. Gear adjusting cam; 141. First mating part; 15. Gear adjusting mounting seat; 151. First abutting part; 152. First rotating shaft; 153. First elastic element; 154. First limiting part; 155. Thread cutting cam; 156. Presser foot lifting cam; 16. Differential ratio fixing part; 17. Differential ratio self-locking component; 18. Differential ratio cam; 181. Second mating part; 19. Differential ratio mounting seat; 191. Second abutting part; 192. Second rotating shaft; 193. Second elastic element; 194. Second limiting part; 20. Thread cutting assembly; 21. Thread cutting follower; 22. First thread cutting linkage; 23. First thread cutting lever; 24. Second thread cutting linkage; 25. 26. Second wire-cutting lever; 27. Wire-cutting shaft; 28. Wire-cutting blade; 30. Wire-cutting reset component; 31. Presser foot lifting assembly; 32. Presser foot lifting follower component; 33. First presser foot lifting lever; 34. Hook; 35. Second presser foot lifting lever; 36. Presser foot shaft; 37. Presser foot arm; 38. Presser foot lifting reset component; 40. Tooth height adjustment assembly; 41. Tooth adjustment follower component; 42. Tooth adjustment lever; 43. Tooth adjustment eccentric shaft; 44. Tooth frame; 45. Tooth adjustment reset component; 50. Differential ratio adjustment assembly; 51. Differential ratio follower component; 52. First differential adjustment lever; 53. First differential adjustment link; 54. Second differential adjustment lever; 55. Differential adjustment shaft; 56. Third differential adjustment lever; 57. Second differential adjustment link; 58. Differential adjustment slider assembly; 59. Differential reset component; 60. Machine body. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Overlock sewing machines are currently the main overlock equipment in the sewing industry. In the actual sewing process, it is necessary to frequently cut threads and lift presser feet. In addition, different sewing process configurations are required for different fabrics. That is, different fabrics have different requirements for differential ratio and tooth height due to different fabric feed amplitudes.

[0035] In related technologies, some overlock sewing machines employ a single-motor drive system, where a single motor is used to adjust functions such as thread cutting, presser foot lifting, differential ratio, and tooth height, greatly improving operational efficiency. However, some functions often cannot be precisely positioned during adjustment, reducing adjustment efficiency.

[0036] Please see Figures 1-9To address the insufficient positioning accuracy in existing overlock sewing machines that use a single motor for multi-functional adjustment, this application provides an overlock sewing machine adjustment device 100. This device 100 includes a drive assembly 10, a thread-cutting assembly 20, a presser foot lifting assembly 30, a tooth height adjustment assembly 40, and a differential ratio adjustment assembly 50. All three assemblies are driven and cooperate with the drive assembly 10, and can cut the thread, lift the presser foot, adjust the tooth height, and adjust the differential ratio under the drive of the drive assembly 10. In other words, this application can achieve thread cutting, presser foot lifting, tooth height adjustment, and differential ratio adjustment functions using only one drive assembly 10.

[0037] Furthermore, such as Figures 2-5 As shown, the drive assembly 10 includes a drive member 11, a drive shaft 111, a tooth-adjusting fixing part 12, a tooth-adjusting self-locking part 13, a tooth-adjusting cam 14, and a tooth-adjusting mounting seat 15. One end of the drive shaft 111 is connected to the drive member 11, and the other end passes through the tooth-adjusting fixing part 12, the tooth-adjusting self-locking part 13, the tooth-adjusting cam 14, and the tooth-adjusting mounting seat 15. The tooth-adjusting self-locking part 13 is fixedly installed on the tooth-adjusting fixing part 12. The tooth-adjusting cam 14 is engaged with the tooth-adjusting self-locking part 13 and can rotate relative to the tooth-adjusting self-locking part 13 in a first preset direction. The tooth-adjusting mounting seat 15 is fixedly connected to the drive shaft 111. The tooth-adjusting mounting seat 15 is provided with a first abutment part 151, and the tooth-adjusting cam 14 is provided with a first mating part 141. When the drive shaft 111 drives the tooth-adjusting mounting seat 15 to rotate a preset angle in the first preset direction, the first abutment part 151 can abut against the first mating part 141, so that the drive shaft 111 can drive the tooth-adjusting cam 14 to rotate synchronously. The tooth-adjusting cam 14 is used to drive and cooperate with the tooth height adjustment component 40.

[0038] Understandably, by setting the tooth-adjusting self-locking component 13, this application ensures that the tooth-adjusting cam 14 can only rotate relative to the tooth-adjusting self-locking component 13 in the first preset direction, and cannot reverse. Thus, when the drive shaft 111 drives the tooth-adjusting cam 14 to rotate via the tooth-adjusting mounting base 15, the first abutment part 151, and the first mating part 141, it is only necessary to control the drive shaft 111 to rotate at the corresponding angle and then stop, thereby fixing the relative position of the tooth-adjusting cam 14 and the tooth height adjustment component 40, thereby locking the tooth height parameter and effectively improving positioning accuracy and adjustment efficiency.

[0039] Specifically, the tooth adjusting fixing part 12 is fixedly installed on the body 60 of the overlock sewing machine, and the drive component 11 is fixedly installed on the tooth adjusting fixing part 12, resulting in high integration and stable overall installation. The drive component 11 is preferably a stepper motor. Furthermore, the tooth adjusting self-locking component 13 can be configured as a one-way bearing or a ratchet, simplifying the structure.

[0040] In one embodiment, such as Figure 2 , Figure 3, Figure 6 and Figure 7 As shown, the drive assembly 10 also includes a differential ratio fixing part 16, a differential ratio self-locking member 17, a differential ratio cam 18, and a differential ratio mounting seat 19. One end of the drive shaft 111 is connected to the drive member 11, and the other end passes through the differential ratio fixing part 16, the differential ratio self-locking member 17, the differential ratio cam 18, and the differential ratio mounting seat 19. The differential ratio self-locking member 17 is fixedly installed in the differential ratio fixing part 16. The differential ratio cam 18 is engaged with the differential ratio self-locking member 17 and can rotate relative to the differential ratio self-locking member 17 in a second preset direction. The differential ratio mounting base 19 is fixedly connected to the drive shaft 111. The differential ratio mounting base 19 has a second abutment portion 191, and the differential ratio cam 18 has a second mating portion 181. When the drive shaft 111 drives the differential ratio mounting base 19 to rotate a preset angle along a second preset direction, the second abutment portion 191 abuts against the second mating portion 181, so that the drive shaft 111 can drive the differential ratio cam 18 to rotate synchronously. The differential ratio cam 18 is used to drive the differential ratio adjustment component 50, and the second preset direction is opposite to the first preset direction.

[0041] It is understood that by setting the differential ratio self-locking component 17, this application can ensure that the differential ratio cam 18 can only rotate relative to the differential ratio self-locking component 17 in the second preset direction, and cannot reverse. In this way, when the drive shaft 111 drives the differential ratio cam 18 to rotate through the differential ratio mounting base 19, the second abutment part 191, and the second mating part 181, it is only necessary to control the drive shaft 111 to rotate at the corresponding angle and then stop, so that the relative position of the differential ratio cam 18 and the differential ratio adjustment component 50 can be fixed, thereby locking the differential ratio parameter and effectively improving the positioning accuracy and adjustment efficiency.

[0042] Specifically, the differential ratio fixing part 16 is fixedly installed on the machine body 60 so that the differential ratio self-locking member 17 will not cause the differential ratio fixing part 16 to rotate under the action of external force. The first abutment part 151 and the second abutment part 191 can be configured as pawls, and the first mating part 141 and the second mating part 181 can be configured as protrusions. Furthermore, the differential ratio self-locking member 17 can be configured as a one-way bearing or a ratchet, resulting in a simple structure.

[0043] Since the differential ratio cam 18 and the tooth adjustment cam 14 of this application can rotate in opposite directions with the drive shaft 111, they have a wider adjustment range when adjusting the differential ratio and tooth height compared to rotating in the same direction. It is easy to understand that if they rotate in the same direction, the corresponding rotation angles need to be divided into zones to avoid mutual interference during adjustment, but this also reduces the adjustment range.

[0044] To ensure that the first abutment portion 151 does not interfere with the first mating portion 141 and thus cause rotational obstruction when the drive shaft 111 rotates in the second preset direction, in one embodiment, such as Figure 4 and Figure 5 As shown, the tooth-adjusting mounting base 15 is provided with a first rotating shaft 152 and a first elastic element 153. The first abutment portion 151 is rotatably engaged with the first rotating shaft 152, and the two ends of the first elastic element 153 are respectively connected to the first abutment portion 151 and the tooth-adjusting mounting base 15. When the first abutment portion 151 rotates relative to the first rotating shaft 152 in a first preset direction, the first elastic element 153 has a tendency to push the first abutment portion 151 to rotate and reset. Thus, during the differential ratio adjustment process achieved by the drive shaft 111 rotating along the second preset direction, and when the tooth adjusting mounting seat 15 rotates to the point where the first abutment portion 151 abuts against the first mating portion 141, the tooth adjusting cam 14 is locked by the tooth adjusting self-locking member 13 and cannot rotate along the second preset direction. That is, the first mating portion 141 remains stationary. Therefore, under the reaction force of the first mating portion 141, the first abutment portion 151 will rotate relative to the first rotating shaft 152 along the first preset direction, thereby preventing the first abutment portion 151 and the first mating portion 141 from obstructing the movement along the second preset direction or from being damaged due to excessive force, thereby improving the reliability of the differential ratio adjustment. Furthermore, when the first abutment portion 151 and the first mating portion 141 are released from contact, the first abutment portion 151 can be reset under the action of the first elastic member 153 to avoid affecting the tooth height adjustment.

[0045] Furthermore, the tooth-adjusting mounting base 15 is also provided with a first limiting part 154, which is spaced apart from the first rotating shaft 152. When the first abutting part 151 abuts and engages with the first mating part 141, the first limiting part 154 can stop the first abutting part 151 on the side away from the first mating part 141. In this way, when the tooth-adjusting mounting base 15 rotates along the first preset direction with the drive shaft 111, the first abutting part 151 can abut against the first limiting part 154 without rotating relative to the first rotating shaft 152, thereby ensuring that the first abutting part 151 can stably apply force to the first mating part 141 and smoothly drive the tooth-adjusting cam 14 to rotate.

[0046] It should be noted that during the rotation of the first limiting part 154 with the tooth-adjusting mounting base 15, the radial distance relative to the center of the drive shaft 111 can be adjusted to prevent it from contacting the first mating part 141, thereby improving the reliability during rotation. Here, the first limiting part 154 and the first rotating shaft 152 can be configured as a pin or bolt separately provided with the tooth-adjusting mounting base 15, or they can be configured as a protruding structure integrally formed with the tooth-adjusting mounting base 15.

[0047] To ensure that the second abutment portion 191 does not interfere with the second mating portion 181 and thus hinder rotation when the drive shaft 111 rotates in the first preset direction, in one embodiment, such as Figure 6 and Figure 7As shown, the differential ratio mounting base 19 is provided with a second rotating shaft 192 and a second elastic member 193. The second abutment portion 191 is rotatably engaged with the second rotating shaft 192, and the two ends of the second elastic member 193 are respectively connected to the second abutment portion 191 and the differential ratio mounting base 19. When the second abutment portion 191 rotates relative to the second rotating shaft 192 in a second preset direction, the second elastic member 193 has a tendency to push the second abutment portion 191 to rotate and reset. Thus, during the tooth height adjustment process achieved by the drive shaft 111 rotating along the first preset direction, and when the differential ratio mounting seat 19 rotates to the point where the second abutment portion 191 abuts against the second mating portion 181, the differential ratio cam 18 is locked by the differential ratio self-locking member 17 and cannot rotate along the first preset direction. That is, the second mating portion 181 remains stationary. Therefore, under the reaction force of the second mating portion 181, the second abutment portion 191 will rotate relative to the second rotating shaft 192 along the second preset direction, thereby preventing the second abutment portion 191 and the second mating portion 181 from obstructing the movement along the first preset direction or from being damaged due to excessive force, thereby improving the reliability of tooth height adjustment. Furthermore, when the second abutment portion 191 and the second mating portion 181 are released from contact, the second abutment portion 191 can be reset under the action of the second elastic member 193 to avoid affecting the differential ratio adjustment.

[0048] Furthermore, the differential ratio mounting base 19 is also provided with a second limiting part 194, which is spaced apart from the second rotating shaft 192. When the second abutting part 191 abuts and engages with the second mating part 181, the second limiting part 194 can stop the second abutting part 191 on the side away from the second mating part 181. In this way, when the differential ratio mounting base 19 rotates along the second preset direction with the drive shaft 111, the second abutting part 191 can abut against the second limiting part 194 without rotating relative to the second rotating shaft 192, thereby ensuring that the second abutting part 191 can stably apply force to the second mating part 181 and smoothly drive the differential ratio cam 18 to rotate.

[0049] It should be noted that during the rotation of the differential ratio mounting base 19, the second limiting part 194 can be adjusted to prevent it from contacting the second mating part 181 by adjusting its radial distance relative to the center of the drive shaft 111, thereby improving the reliability during rotation. Here, the second limiting part 194 and the second rotating shaft 192 can be configured as a pin or bolt separately provided with the differential ratio mounting base 19, or they can be configured as a protruding structure integrally formed with the differential ratio mounting base 19.

[0050] For ease of explanation, this application defines the first preset direction as the counterclockwise rotation direction of the drive shaft 111, and the second preset direction corresponds to the clockwise rotation direction of the drive shaft 111.

[0051] In one embodiment, such as Figure 4 and Figure 5 As shown, the tooth height adjustment assembly 40 includes a tooth adjustment follower 41, a tooth adjustment lever 42, a tooth adjustment eccentric shaft 43, and a tooth frame 44 connected in sequence, wherein the tooth that enables the feeding drive is fixed at the end of the tooth frame 44 away from the tooth adjustment eccentric shaft 43.

[0052] Based on this, the principle by which this application achieves tooth height adjustment is as follows:

[0053] The driving component 11 drives the driving shaft 111 to rotate counterclockwise, thereby driving the tooth adjusting mounting seat 15 to rotate counterclockwise. When the tooth adjusting mounting seat 15 rotates to the point where the first abutting part 151 abuts against the first mating part 141, the tooth adjusting mounting seat 15 can drive the tooth adjusting cam 14 to rotate synchronously, causing the tooth adjusting follower 41 in contact with the tooth adjusting cam 14 to swing downwards, and through the tooth adjusting lever 42, drive the tooth adjusting eccentric shaft 43 to rotate counterclockwise, so that the end of the tooth frame 44 connected to the tooth adjusting eccentric shaft 43 moves downwards, and the end away from the tooth adjusting eccentric shaft 43 moves upwards, thereby raising the tooth height. Furthermore, since the tooth adjusting self-locking component 13 is fixedly installed on the tooth adjusting fixing part 12, it cannot rotate, and according to the physical characteristics of the tooth adjusting self-locking component 13, the tooth adjusting cam 14 can only rotate counterclockwise within the tooth adjusting self-locking component 13, and the reverse rotation action cannot be realized. In this way, the tooth height is adjusted by rotating counterclockwise on the tooth adjustment cam 14, and the tooth height parameter is locked by the tooth adjustment self-locking component 13. This achieves parameterized adjustment of tooth height, which can quickly respond to the intelligent adjustment of equipment performance parameters when switching between different products, reducing the skill requirements of operators. At the same time, one rotation can restore the tooth height to the initial state, making the adjustment stable and reliable, and with a wide adjustment range.

[0054] Furthermore, the tooth height adjustment assembly 40 also includes a tooth adjustment reset member 45, which is connected to the body 60 and the tooth adjustment lever 42. When the drive member 11 is reset, the tooth adjustment reset member 45 can drive the entire tooth height adjustment assembly 40 to reset synchronously.

[0055] In one embodiment, such as Figure 6 and Figure 7 As shown, the differential ratio adjustment assembly 50 includes a differential ratio follower 51, a first differential adjustment lever 52, a first differential adjustment link 53, a second differential adjustment lever 54, a differential adjustment shaft 55, a third differential adjustment lever 56, a second differential adjustment link 57, and a differential adjustment slider assembly 58 connected in sequence. The middle portion of the first differential adjustment lever 52 is rotatably connected to the body 60 of the overlock sewing machine, and the differential adjustment slider assembly 58 is in sliding engagement with the gripper 44.

[0056] Based on this, the principle by which this application achieves differential ratio height adjustment is as follows:

[0057] The driving component 11 drives the driving shaft 111 to rotate clockwise, thereby driving the differential ratio mounting seat 19 to rotate clockwise. When the differential ratio mounting seat 19 rotates to the point where the second abutting part 191 abuts against the second mating part 181, the differential ratio mounting seat 19 can drive the differential ratio cam 18 to rotate synchronously, causing the differential ratio follower 51 in contact with the differential ratio cam 18 to swing downward. That is, one end of the first differential adjustment lever 52 connected to the differential ratio follower 51 swings downward, while the other end swings upward. This, in turn, drives one end of the second differential adjustment lever 54 to swing upward through the first differential adjustment link 53. The other end of the second differential adjustment lever 54 can drive the differential adjustment shaft 55 to rotate clockwise. Therefore, the differential adjustment shaft 55 can drive the third differential adjustment lever 56 to swing upward, causing the second differential adjustment link 57 and the differential adjustment slider assembly 58 connected to the third differential adjustment lever 56 to move upward, thereby realizing the adjustment of the differential ratio. Furthermore, since the differential ratio self-locking component 17 is fixedly installed on the differential ratio fixing part 16, it cannot rotate. Also, based on the physical characteristics of the differential ratio self-locking component 17, the differential ratio cam 18 can only rotate clockwise within the differential ratio self-locking component 17; reverse rotation is not possible. Thus, clockwise rotation of the differential ratio cam 18 adjusts the differential ratio, and the differential ratio parameter is locked through the differential ratio self-locking component 17, achieving parameterized adjustment of the differential ratio. This allows for rapid and intelligent adjustment of equipment performance parameters during product switching, reducing the skill requirements for operators. Simultaneously, one full rotation restores the differential ratio to its initial state, ensuring stable and reliable adjustment with a wide adjustment range.

[0058] Furthermore, the differential ratio adjustment assembly 50 also includes a differential reset member 59, which is connected to the body 60 and the first differential adjustment lever 52. When the drive member 11 is reset, the differential reset member 59 can drive the entire differential ratio adjustment assembly 50 to reset synchronously.

[0059] In one embodiment, such as Figure 8 As shown, the tooth-adjusting mounting base 15 is equipped with a wire-cutting cam 155, which is used to drive the wire-cutting assembly 20. This integration of the wire-cutting cam 155 simplifies the overall structure.

[0060] Specifically, the wire cutting assembly 20 includes a wire cutting follower 21, a first wire cutting link 22, a first wire cutting lever 23, a second wire cutting link 24, a second wire cutting lever 25, a wire cutting shaft 26, and a wire cutting blade 27 connected in sequence. The first wire cutting link 22 is connected to the middle of the first wire cutting lever 23, and the end of the first wire cutting lever 23 away from the second wire cutting link 24 is connected to the machine body 60.

[0061] Based on this, the principle of wire cutting in this application is as follows:

[0062] The driving component 11 drives the driving shaft 111 to rotate clockwise, which in turn drives the wire-cutting cam 155 to rotate clockwise. This causes the wire-cutting cam 155 to push the wire-cutting follower 21 upward. The wire-cutting follower 21, through the first wire-cutting connecting rod 22, pushes the first wire-cutting lever 23 to swing upward. The first wire-cutting lever 23, in turn, drives the second wire-cutting lever 25 to swing upward through the second wire-cutting connecting rod 24. The second wire-cutting lever 25 then drives the wire-cutting shaft 26 to rotate, causing the wire-cutting blade 27 to complete the wire-cutting action. In this way, automatic wire cutting is achieved through the driving component 11, effectively reducing labor intensity and improving work efficiency.

[0063] Furthermore, the wire cutting assembly 20 also includes a wire cutting reset component 28, which is connected to the body 60 and the first wire cutting lever 23. When the drive component 11 is reset, the wire cutting reset component 28 can drive the entire wire cutting assembly 20 to reset synchronously.

[0064] In one embodiment, such as Figure 9 As shown, the tooth adjusting mounting base 15 is provided with a pressure foot lifting cam 156, which is used to drive the pressure foot lifting assembly 30. In this way, the pressure foot lifting cam 156 is integrated, and the overall structure is simpler.

[0065] Specifically, the presser foot lifting assembly 30 includes a presser foot lifting follower 31, a first presser foot lifting lever 32, a hook 33, a second presser foot lifting lever 34, a presser foot shaft 35, a presser foot arm 36, and a presser foot component 37 connected in sequence. One end of the first presser foot lifting lever 32 is connected to the machine body 60 or the tooth adjusting fixing part 12, and the presser foot shaft 35 is rotatably connected to the machine body 60.

[0066] Based on this, the principle by which this application achieves the lifting of the pressure foot is as follows:

[0067] The driving component 11 drives the driving shaft 111 to rotate counterclockwise, which in turn drives the pressure foot lifting cam 156 to rotate counterclockwise. This causes the pressure foot lifting cam 156 to press down the pressure foot lifting follower 31. The pressure foot lifting follower 31 drives the first pressure foot lifting lever 32 to swing downward, and through the hook 33, it pulls the second pressure foot lifting lever 34 to swing downward. This causes the second pressure foot lifting lever 34 to drive the pressure foot shaft 35 to rotate. The rotation of the pressure foot shaft 35 causes the pressure foot arm 36 to swing upward, thereby causing the pressure foot component 37 connected to the end of the pressure foot arm 36 to move upward, thus realizing the pressure foot lifting action. In this way, the driving component 11 realizes automatic pressure foot lifting, effectively improving work efficiency.

[0068] Furthermore, the presser foot lifting assembly 30 also includes a presser foot lifting reset member 38, which is connected to the tooth adjusting fixing part 12 and the first presser foot lifting lever 32. When the driving member 11 is reset, the presser foot lifting reset member 38 can drive the entire presser foot lifting assembly 30 to reset synchronously.

[0069] In summary, this application uses a single drive unit 11 to simultaneously achieve four parameter actions: wire cutting, pressing foot lifting, differential ratio adjustment, and tooth height adjustment. It features a high degree of automation and integration, a compact structure, and reduced space occupancy.

[0070] This application also provides an overlock sewing machine, which includes the overlock sewing machine adjustment device 100 described in any of the above embodiments.

[0071] 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.

[0072] 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 adjustment device for an overlock sewing machine, comprising a drive assembly (10), a thread-cutting assembly (20), a presser foot lifting assembly (30), a tooth height adjustment assembly (40), and a differential ratio adjustment assembly (50), wherein the thread-cutting assembly (20), the presser foot lifting assembly (30), the tooth height adjustment assembly (40), and the differential ratio adjustment assembly (50) are all driven and cooperate with the drive assembly (10), and are capable of cutting thread, lifting presser foot, adjusting tooth height, and adjusting differential ratio under the drive assembly (10); Its features are, The drive assembly (10) includes a drive member (11), a drive shaft (111), a tooth adjusting fixing part (12), a tooth adjusting self-locking part (13), a tooth adjusting cam (14), and a tooth adjusting mounting seat (15). One end of the drive shaft (111) is connected to the drive member (11), and the other end passes through the tooth adjusting fixing part (12), the tooth adjusting self-locking part (13), the tooth adjusting cam (14), and the tooth adjusting mounting seat (15). The tooth-adjusting self-locking component (13) is fixedly installed on the tooth-adjusting fixing part (12), and the tooth-adjusting cam (14) is connected to the tooth-adjusting self-locking component (13) and can rotate relative to the tooth-adjusting self-locking component (13) in a first preset direction; The tooth-adjusting mounting base (15) is fixedly connected to the drive shaft (111), and the tooth-adjusting mounting base (15) is provided with a first abutting part (151), and the tooth-adjusting cam (14) is provided with a first mating part (141). When the drive shaft (111) drives the tooth-adjusting mounting base (15) to rotate a preset angle along the first preset direction, the first abutting part (151) can abut against the first mating part (141), so that the drive shaft (111) can drive the tooth-adjusting cam (14) to rotate synchronously. The tooth-adjusting cam (14) is used to drive the tooth height adjustment assembly (40).

2. The overlock sewing machine adjustment device according to claim 1, characterized in that, The tooth-adjusting mounting base (15) is provided with a first rotating shaft (152) and a first elastic element (153). The first abutting part (151) is rotatably engaged with the first rotating shaft (152). The two ends of the first elastic element (153) are respectively connected to the first abutting part (151) and the tooth-adjusting mounting base (15). When the first abutting part (151) rotates relative to the first rotating shaft (152) along the first preset direction, the first elastic member (153) has a tendency to push the first abutting part (151) to rotate and reset.

3. The overlock sewing machine adjustment device according to claim 2, characterized in that, The tooth-adjusting mounting base (15) is also provided with a first limiting part (154), which is spaced apart from the first rotating shaft (152); When the first abutting part (151) abuts and engages with the first mating part (141), the first limiting part (154) can stop the first abutting part (151) on the side away from the first mating part (141).

4. The overlock sewing machine adjustment device according to claim 1, characterized in that, The drive assembly (10) further includes a differential ratio fixing part (16), a differential ratio self-locking part (17), a differential ratio cam (18), and a differential ratio mounting seat (19). One end of the drive shaft (111) is connected to the drive assembly (11), and the other end passes through the differential ratio fixing part (16), the differential ratio self-locking part (17), the differential ratio cam (18), and the differential ratio mounting seat (19). The differential ratio self-locking component (17) is fixedly installed on the differential ratio fixing part (16), and the differential ratio cam (18) is connected to the differential ratio self-locking component (17) and can rotate relative to the differential ratio self-locking component (17) in a second preset direction; The differential ratio mounting base (19) is fixedly connected to the drive shaft (111), and the differential ratio mounting base (19) is provided with a second abutment part (191), and the differential ratio cam (18) is provided with a second mating part (181). When the drive shaft (111) drives the differential ratio mounting base (19) to rotate a preset angle along the second preset direction, the second abutment part (191) can abut against the second mating part (181) so that the drive shaft (111) can drive the differential ratio cam (18) to rotate synchronously. The differential ratio cam (18) is used to drive and cooperate with the differential ratio adjustment component (50), and the second preset direction is opposite to the first preset direction.

5. The overlock sewing machine adjustment device according to claim 4, characterized in that, The differential ratio mounting base (19) is provided with a second rotating shaft (192) and a second elastic element (193). The second abutting part (191) is rotatably engaged with the second rotating shaft (192). The two ends of the second elastic element (193) are respectively connected to the second abutting part (191) and the differential ratio mounting base (19). When the second abutment (191) rotates relative to the second pivot (192) in the second preset direction, the second elastic member (193) has a tendency to push the second abutment (191) to rotate and reset.

6. The overlock sewing machine adjustment device according to claim 5, characterized in that, The differential ratio mounting base (19) is also provided with a second limiting part (194), which is spaced apart from the second rotating shaft (192); When the second abutting part (191) abuts and engages with the second mating part (181), the second limiting part (194) can stop the second abutting part (191) on the side away from the second mating part (181).

7. The overlock sewing machine adjustment device according to claim 4, characterized in that, The tooth-adjusting self-locking component (13) is configured as a one-way bearing or a ratchet; And / or, the differential ratio self-locking element (17) is configured as a one-way bearing or a ratchet.

8. The overlock sewing machine adjustment device according to claim 1, characterized in that, The tooth-adjusting mounting base (15) is provided with a wire-cutting cam (155), which is used to drive and cooperate with the wire-cutting assembly (20); And / or, the tooth adjusting mounting base (15) is provided with a lifting foot cam (156), which is used to drive and cooperate with the lifting foot assembly (30).

9. An adjustment device for an overlock sewing machine, comprising a drive assembly (10), a thread-cutting assembly (20), a presser foot lifting assembly (30), a tooth height adjustment assembly (40), and a differential ratio adjustment assembly (50), wherein the thread-cutting assembly (20), the presser foot lifting assembly (30), the tooth height adjustment assembly (40), and the differential ratio adjustment assembly (50) are all driven and cooperate with the drive assembly (10), and are capable of cutting thread, lifting presser foot, adjusting tooth height, and adjusting differential ratio under the drive of the drive assembly (10); Its features are, The drive assembly (10) includes a drive member (11), a drive shaft (111), a differential ratio fixing part (16), a differential ratio self-locking part (17), a differential ratio cam (18), and a differential ratio mounting seat (19). One end of the drive shaft (111) is connected to the drive member (11), and the other end passes through the differential ratio fixing part (16), the differential ratio self-locking part (17), the differential ratio cam (18), and the differential ratio mounting seat (19). The differential ratio self-locking component (17) is fixedly installed on the differential ratio fixing part (16), and the differential ratio cam (18) is connected to the differential ratio self-locking component (17) and can rotate relative to the differential ratio self-locking component (17) in a second preset direction; The differential ratio mounting base (19) is fixedly connected to the drive shaft (111). The differential ratio mounting base (19) is provided with a second abutment part (191), and the differential ratio cam (18) is provided with a second mating part (181). When the drive shaft (111) drives the differential ratio mounting base (19) to rotate a preset angle along the second preset direction, the second abutment part (191) can abut against the second mating part (181) so that the drive shaft (111) can drive the differential ratio cam (18) to rotate synchronously.

10. An overlock sewing machine, characterized in that, The overlock sewing machine adjustment device includes any one of claims 1 and 9.

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