Cutting mechanism for a sewing apparatus

Abstract

The application relates to the sewing machine technical field, in particular to a cutting mechanism for sewing equipment, which comprises a base plate unit, the base plate unit comprises a first plate body arranged on the sewing equipment in the external environment and a cutter unit arranged on the first plate body; further comprising a driving unit and a connecting rod unit used in cooperation with the cutter unit, the cutter unit comprises a cutting knife used for cutting fabrics, the driving unit comprises a driving piece used for driving the cutting knife to reciprocate via the connecting rod unit; the cutting mechanism further comprises a switch module and a shift fork used in cooperation with the switch module, the reciprocating motion of the cutting knife is realized through the driving piece and the connecting rod unit, so that the automatic cutting of the fabric is realized, the production efficiency is effectively improved, the running state of the driving unit can be controlled through the cooperation of the switch module and the shift fork, the starting or stopping of the cutting mechanism is realized, the operation is more flexible and convenient, and the application is conducive to promotion.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, and in particular discloses a cutting mechanism for sewing equipment. Background Technology

[0002] Currently, when a sewing machine uses its roller mechanism to sew fabrics together, the fabrics are usually aligned before the roller mechanism drives the sewing thread to complete the sewing. After sewing, people manually use scissors to cut off any excess fabric scraps outside the seam.

[0003] While existing technologies include cutting mechanisms for sewing equipment to cut off excess fabric scraps beyond the seam, these mechanisms can only perform simple cutting operations and cannot be quickly started or stopped. Furthermore, they cannot raise the cutting mechanism further when it is stopped to prevent accidents. Therefore, there is an urgent need for a cutting mechanism for sewing equipment that can solve the above problems. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of existing technologies that can only perform simple cutting operations and cannot achieve rapid start or stop of the cutting mechanism, the purpose of this invention is to provide a cutting mechanism for sewing equipment.

[0005] To achieve the above objectives, the present invention provides a cutting mechanism for a sewing device, comprising a base plate unit, the base plate unit comprising a first plate body disposed on an external sewing device and a cutting blade unit disposed on the first plate body; further comprising a drive unit and a connecting rod unit used in conjunction with the cutting blade unit, the cutting blade unit comprising a cutting blade for cutting fabric, and the drive unit comprising a drive member for driving the cutting blade to reciprocate via the connecting rod unit.

[0006] The cutting mechanism also includes a switch module electrically connected to the drive unit and a shift fork unit used in conjunction with the switch module. The shift fork unit includes a shift fork component for controlling the operating state of the drive unit to start or stop via the switch module.

[0007] Preferably, the drive unit includes an eccentric wheel and a cam that cooperate with the connecting rod unit. The drive element is used to drive the eccentric wheel to rotate, and the cam rotates via the eccentric wheel. The cam is rotatably connected to one end of the connecting rod unit.

[0008] Preferably, a second bearing is provided between the eccentric wheel and the cam, and the central axes of the eccentric wheel, the second bearing, and the cam coincide and are parallel to the central axis of the output end of the drive component.

[0009] Preferably, the linkage unit includes a first rod rotatably mounted on the cam and at one end away from the axis of the second bearing, and a second rod rotatably mounted on the first plate. The end of the second rod close to the first rod is rotatably mounted at the end of the first rod away from the cam, and the end of the second rod away from the first rod is mounted on the cutting unit to drive the cutting blade to reciprocate.

[0010] Preferably, the cutting unit further includes a cutting blade holder that is movably coupled to the end of the second rod away from the first rod and is movably disposed on the first plate, with the cutting blade disposed on the cutting blade holder.

[0011] Preferably, the switch module includes a sixth plate disposed on the first plate and a micro switch disposed on the sixth plate. The micro switch is electrically connected to the driving component to control the operating state of the driving component.

[0012] Preferably, the shift fork unit includes a fourth column disposed on the first plate, and a fifth plate disposed on the fourth column for pressing a trigger on the micro switch, the trigger being used to trigger the start / stop state of the micro switch.

[0013] Preferably, the shift fork unit includes a third plate disposed on the first plate and a shift fork disposed on the third plate. The shift fork is disposed at the end of the third plate away from the fourth column for easy operation by the user.

[0014] Preferably, a third column is also provided on the fourth column, the middle part of the third plate is rotatably mounted on the first plate, and a fifth groove for accommodating the third column is provided at one end of the third plate near the third column.

[0015] Preferably, a fifth rod is provided at the end of the fifth plate that is away from the fourth column, and the end of the fifth rod that is away from the fifth plate is provided at the end of the first rod that is away from the second rod or at the end of the cam that is away from the axis of the second bearing.

[0016] The beneficial effects of this invention are:

[0017] 1. The reciprocating motion of the cutting blade is achieved through the drive unit and the connecting rod unit, thereby realizing the automatic cutting of fabric and effectively improving production efficiency. The operation status of the drive unit can be controlled by the cooperation of the switch module and the shift fork, realizing the start or stop of the cutting mechanism, making the operation more flexible and convenient. At the same time, this cutting mechanism can be installed on external sewing equipment, is suitable for different types of sewing equipment, has a certain degree of versatility, and is conducive to promotion.

[0018] 2. By using the linkage unit, the oscillation of the cam can be effectively converted into the reciprocating motion of the cutting blade on the cutting unit, thereby achieving efficient energy transfer and efficient cutting operation. At the same time, the linkage unit can effectively balance and transmit force, making the movement of the cutting blade more stable and smooth. By using the linkage unit, complex motion conversion between the cam and the cutting unit can be realized, while maintaining a relatively simple mechanical structure, making it easy to maintain and operate.

[0019] 3. The design of the sliding third block and cutting blade holder housed inside the fourth groove allows the cutting blade holder to effectively convert the force of the second rod's swing into the force of the cutting blade holder's up-and-down movement, which is beneficial for accurate cutting. The design of the third block and cutting blade holder allows the cutting blade to maintain a good position and angle during the cutting process, thereby improving the cutting accuracy and quality. At the same time, the sliding arrangement of the third and fourth rods with the first plate can effectively support and stabilize the movement of the cutting blade holder and the cutting blade, making the entire cutting process smoother. The design of the cutting blade holder, cutting blade, and related components makes the replacement and maintenance of the cutting blade more convenient, which is beneficial for the maintenance and upkeep of the equipment.

[0020] 4. After the micro switch is controlled by rotating the fifth plate body through the toggle fork, the fifth rod pulls or drives the cam to rotate. The rotation of the cam drives the cutting blade on the cutting blade unit to move upward through the linkage unit. Based on canceling the running state of the drive component, the cutting state is further canceled, thereby quickly canceling the cutting state and raising the cutting blade away from the needle plate trimming assembly. This is beneficial for quickly stopping the cutting operation when needed and improving the safety of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main body structure of the present invention;

[0022] Figure 2 This is an exploded view of the main structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the switch module structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the drive unit structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the cutting unit structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the connecting rod unit and shift fork unit of the present invention;

[0027] Figure 7 This is a schematic diagram of the connecting rod unit of the present invention;

[0028] Figure 8 This is a schematic diagram of the first plate structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the eccentric wheel structure of the present invention;

[0030] Figure 10 This is a planar schematic diagram of the eccentric wheel of the present invention.

[0031] The reference numerals in the figures include:

[0032] 1—Baseboard unit 2—Drive unit 3—Connecting rod unit

[0033] 4—Cutter unit; 5—Shift fork unit; 6—Switch module

[0034] 11—First Plate 12—First Column 13—Second Plate

[0035] 61—Sixth Plate 15—First Groove 16—Second Groove

[0036] 17—Limiting block; 21—Driver; 22—First bearing

[0037] 23—Eccentric wheel 24—Second bearing 25—Cam

[0038] 31—First rod; 32—Second rod; 58—Fifth rod

[0039] 57—Fifth Plate Body; 41—Needle Plate Trimming Assembly; 42—Cutting Blade Holder

[0040] 43—Fourth groove body; 44—Third block body; 45—Third rod body

[0041] 46—Fourth rod; 47—Cutter; 62—Micro switch

[0042] 51—Third plate body; 52—Shift fork assembly; 53—Fifth groove body

[0043] 54—Third column 55—Fourth column 56—Fourth plate Detailed Implementation

[0044] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0045] Please see Figures 1 to 10As shown, a cutting mechanism for a sewing device according to the present invention includes a base plate unit 1. The base plate unit 1 includes a first plate 11 disposed on an external sewing device and a cutting blade unit 4 disposed on the first plate 11. It also includes a drive unit 2 and a connecting rod unit 3 used in conjunction with the cutting blade unit 4. The cutting blade unit 4 includes a cutting blade 47 for cutting fabric. The drive unit 2 includes a drive member 21 for driving the cutting blade 47 to reciprocate and cut the fabric via the connecting rod unit 3.

[0046] The cutting mechanism also includes a switch module 6 electrically connected to the drive unit 21 and a shift fork unit 5 used in conjunction with the switch module 6. The shift fork unit 5 includes a shift fork 52 for controlling the operating state of the drive unit 2 to start or stop via the switch module 6.

[0047] The cutting mechanism also includes a limiting block 17 used in conjunction with the shift fork 52. The limiting block 17 is used to limit the range of motion of the shift fork 52. In this embodiment, the limiting block 17 is disposed on the first plate 11.

[0048] Specifically, the reciprocating motion of the cutting blade 47 is achieved through the drive unit 21 and the connecting rod unit 3, thereby realizing automatic fabric cutting and effectively improving production efficiency. Through the cooperation of the switch module 6 and the shift fork 52, the operating status of the drive unit 2 can be controlled to start or stop the cutting mechanism, making the operation more flexible and convenient. At the same time, this cutting mechanism can be installed on external sewing equipment and is suitable for different types of sewing equipment, which has a certain degree of versatility and is conducive to promotion.

[0049] Specifically, a second groove 16 is provided on the first plate 11, and the first plate 11 is set on an external sewing device via the second groove 16. The base unit 1 also includes a first column 12 and a second plate 13. The second plate 13 is set on the first plate 11 via four first columns 12, and the connection between the first columns 12 and the second plate 13 is a bolt connection.

[0050] Specifically, the drive unit 2 includes an eccentric wheel 23 and a cam 25 that work in conjunction with the connecting rod unit 3. The drive component 21 is used to drive the eccentric wheel 23 to rotate, and the cam 25 rotates via the eccentric wheel 23. This design enables precise control of the connecting rod unit 3, thereby meeting specific process requirements or motion trajectories.

[0051] Specifically, the output end of the drive component 21 passes through the first plate 11 and a first bearing 22 is provided on the output end of the drive component 21. A first groove 15 for accommodating the first bearing 22 is provided on the first plate 11. The first bearing 22 helps to reduce the friction between the output end of the drive component 21 and the first plate 11, so that the mechanical equipment can operate more efficiently. At the same time, the first bearing 22 can reduce the wear between the output end of the drive component 21 and the first plate 11, thereby extending the service life of the mechanical equipment.

[0052] Specifically, a second bearing 24 is provided between the eccentric wheel 23 and the cam 25. The central axes of the eccentric wheel 23, the second bearing 24, and the cam 25 coincide and are parallel to the central axis of the output end of the drive member 21. This is used to drive the cam 25 to rotate via the drive member 21. The cam 25 is rotatably connected to one end of the connecting rod unit 3. The cam 25 is limited by the connecting rod unit 3 to achieve swing motion. By providing the second bearing 24, friction and wear during the swing process of the cam 25 can be reduced. The second bearing 24 can provide stable support, reduce friction, and extend the service life of the cam 25.

[0053] Specifically, the linkage unit 3 includes a first rod 31 rotatably mounted on the cam 25 and located away from the axis of the second bearing 24, and a second rod 32 rotatably mounted on the first plate 11. The end of the second rod 32 near the first rod 31 is rotatably mounted on the end of the first rod 31 away from the cam 25, and the end of the second rod 32 away from the first rod 31 is mounted on the cutter unit 4 to drive the cutter 47 to reciprocate. By using the linkage unit 3, the force on the cam 25 can be effectively converted into the reciprocating motion of the cutter 47 on the cutter unit 4, thereby achieving effective energy transfer and efficient cutting operation. At the same time, the linkage unit 3 can effectively balance and transmit force, making the movement of the cutter 47 more stable and smooth. By using the linkage unit 3, complex motion conversion between the cam 25 and the cutter unit 4 can be realized, while maintaining a relatively simple mechanical structure, making it easy to maintain and operate.

[0054] Specifically, the cutting unit 4 also includes a cutting blade holder 42 that is movably fitted to the end of the second rod 32 away from the first rod 31 and movably mounted on the first plate 11. A cutting blade 47 is mounted on the cutting blade holder 42. The cutting blade holder 42 also has a fourth groove 43. A third block 44, rotatably mounted on the second rod 32, is housed inside the fourth groove 43. The third block 44 slides within the fourth groove 43. A third rod 45 and a fourth rod 46 are also fixedly mounted on the cutting blade holder 42. Both the third rod 45 and the fourth rod 46 slide against the first plate 11. The slidable third block 44 housed inside the fourth groove 43 and the cutting blade holder 42 are designed to... The design allows the cutting blade holder 42 to effectively convert the swinging force of the second rod 32 into the up-and-down movement force of the cutting blade holder 42, which is beneficial to the accurate cutting of the cutting blade 47. The design of the third block 44 and the cutting blade holder 42 allows the cutting blade 47 to maintain a good position and angle during the cutting process, thereby improving the cutting accuracy and quality. At the same time, the third rod 45 and the fourth rod 46 are slidably set with the first plate 11, which can effectively support and stabilize the movement of the cutting blade holder 42 and the cutting blade 47, making the entire cutting process smoother. The design of the cutting blade holder 42, the cutting blade 47 and related components makes the replacement and maintenance of the cutting blade more convenient, which is beneficial to the maintenance and upkeep of the equipment.

[0055] Specifically, the switch module 6 includes a sixth board 61 disposed on the first board 11 and a micro switch 62 disposed on the sixth board 61. The micro switch 62 is electrically connected to the drive component 21 to control the operating state of the drive component 21. The micro switch 62 can conveniently control the operating state of the drive component 21. Through the electrical connection between the micro switch 62 and the drive component 21, the drive component 21 can be started and stopped, thereby realizing the control of the equipment. The design of the micro switch 62 makes the operating state of the drive component 21 more flexible and controllable. It can be started or stopped at any time as needed, which is conducive to adjusting the operating state of the equipment according to the actual situation. At the same time, the control of the drive component 21 by the micro switch 62 can improve the safety of the equipment and ensure that the equipment can stop operating in time when necessary to avoid accidents.

[0056] Specifically, the shift fork unit 5 includes a fourth column 55 disposed on the first plate 11. The fourth column 55 is provided with a fifth plate 57 for pressing the trigger on the micro switch 62. The trigger is used to trigger the start and stop state of the micro switch 62. By pressing the trigger on the micro switch 62 by the fifth plate 57, the micro switch 62 can be precisely triggered, ensuring that the micro switch 62 can be accurately started and stopped when needed, thereby controlling the operating state of the cutting mechanism. The design of the shift fork unit 5 makes the triggering of the micro switch 62 more flexible and controllable. The micro switch 62 can be triggered at any time as needed, which is conducive to adjusting the operating state of the equipment according to the actual situation, while also making the operation efficient and convenient.

[0057] Specifically, the shift fork unit 5 includes a third plate 51 disposed on the first plate 11 and a shift fork 52 disposed on the third plate 51. The shift fork 52 is disposed at the end of the third plate 51 away from the fourth column 55, which is convenient for the user to shift. At the same time, it effectively avoids the user from being mechanically injured when shifting the shift fork 52. The fact that it is disposed on the right side of the first plate 11 (relative to the user's direction of use) also makes it easier for the user to operate and is in line with ergonomics.

[0058] Specifically, a fourth plate 56 is also provided on the fourth column 55, and a third column 54 is provided on the fourth plate 56. The middle part of the third plate 51 is rotatably mounted on the first plate 11. A fifth groove 53 for accommodating the third column 54 is provided at one end of the third plate 51 near the third column 54, so that the third plate 51 can control the rotation direction of the fourth column 55 via the third column 54. This simplifies the mechanical structure and makes it easier to control the state of the micro switch 62.

[0059] Specifically, the cutting machine also includes a needle plate trimming assembly 41 for trimming or finishing fabrics.

[0060] Specifically, a fifth rod 58 is provided at the end of the fifth plate 57 away from the fourth column 55. The end of the fifth rod 58 away from the fifth plate 57 is located at the end of the first rod 31 away from the second rod 32 or at the end of the cam 25 away from the axis of the second bearing 24. After the fifth plate 57 is rotated by the toggle fork 52 to control the state of the micro switch 62, the fifth rod 58 pulls or drives the cam 25 to rotate. The rotation of the cam 25 drives the cutting blade 47 on the cutting blade unit 4 to move upward through the linkage unit 3. Based on canceling the running state of the drive unit 21, the cutting state is further canceled, thereby quickly canceling the cutting state and raising the cutting blade 47 away from the needle plate trimming assembly 41. This is beneficial for quickly stopping the cutting operation when needed and improving the safety of the equipment.

[0061] Specifically, the first plate 11 is also provided with a limiting block 17 for limiting the rotation direction of the fifth plate 57. The fifth plate 57 is located between the limiting block 17 and the micro switch 62, so that the fifth plate 57 can only rotate toward the micro switch 62 and be limited by the limiting block 17 away from the micro switch 62.

[0062] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A cutting mechanism for sewing equipment, comprising a first plate (11) for use with external sewing equipment, and a cutting unit (4) disposed on the first plate (11); characterized in that: It also includes a drive unit (2) and a connecting rod unit (3) used in conjunction with the cutting unit (4). The cutting unit (4) includes a cutting blade (47) for cutting fabric, and the drive unit (2) includes a drive member (21) for driving the cutting blade (47) to reciprocate via the connecting rod unit (3). The cutting mechanism also includes a switch module (6) electrically connected to the drive unit (21) and a shift fork unit (5) used in conjunction with the switch module (6). The shift fork unit (5) includes a shift fork (52) for controlling the operation state of the drive unit (2) via the switch module (6) to start or stop the shift fork. The drive unit (2) includes an eccentric wheel (23) and a cam (25) that cooperate with the connecting rod unit (3). The drive member (21) is used to drive the eccentric wheel (23) to rotate. The cam (25) rotates via the eccentric wheel (23). The cam (25) is rotatably connected to one end of the connecting rod unit (3). The shift fork unit (5) includes a fourth column (55) disposed on the first plate (11), and a fifth plate (57) disposed on the fourth column (55) for pressing the trigger on the micro switch (62). The trigger is used to trigger the start / stop state of the micro switch (62). The shift fork unit (5) includes a third plate (51) rotatably mounted on the first plate (11) and a shift fork (52) mounted on the third plate (51). The shift fork (52) is located at the end of the third plate (51) away from the fourth column (55) for easy operation by the user. The fourth column (55) is also provided with a third column (54), the middle part of the third plate (51) is rotatably set on the first plate (11), and a fifth groove (53) for accommodating the third column (54) is opened at the end of the third plate (51) near the third column (54). The fifth rod (58) is located at the end of the fifth plate (57) away from the fourth column (55). The end of the fifth rod (58) away from the fifth plate (57) is located at the end of the first rod (31) away from the second rod (32) or at the end of the cam (25) away from the axis of the second bearing (24).

2. The cutting mechanism for sewing equipment according to claim 1, characterized in that: A second bearing (24) is provided between the eccentric wheel (23) and the cam (25). The central axes of the eccentric wheel (23), the second bearing (24), and the cam (25) coincide and are parallel to the central axis of the output end of the drive unit (21).

3. The cutting mechanism for sewing equipment according to claim 2, characterized in that: The linkage unit (3) includes a first rod (31) rotatably mounted on the cam (25) and at one end away from the axis of the second bearing (24), and a second rod (32) rotatably mounted on the first plate (11). The end of the second rod (32) close to the first rod (31) is rotatably mounted at the end of the first rod (31) away from the cam (25), and the end of the second rod (32) away from the first rod (31) is mounted on the cutter unit (4) to drive the cutter (47) to reciprocate.

4. A cutting mechanism for sewing equipment according to claim 3, characterized in that: The cutting unit (4) also includes a cutting knife holder (42) that is movably engaged with the end of the second rod (32) away from the first rod (31) and is movably disposed on the first plate (11), and the cutting knife (47) is disposed on the cutting knife holder (42).

5. A cutting mechanism for sewing equipment according to claim 1, characterized in that: The switch module (6) includes a sixth plate (61) disposed on the first plate (11), and a micro switch (62) disposed on the sixth plate (61). The micro switch (62) is used to control the operating state of the drive unit (21).

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