Stepping motor type thread trimming presser foot structure
By using a stepper motor-driven thread-cutting presser foot structure, the drive and actuating components rotate to stop the thread cutter and presser foot, solving the problem of unstable thread-cutting and presser foot movements in traditional sewing equipment and achieving high-precision and high-efficiency sewing operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GANZHOU FEIYUE INTELLIGENT TECH CO LTD
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-21
AI Technical Summary
In traditional industrial sewing equipment, the actions of thread cutting and presser foot rely on solenoid valves, which can easily lead to reset failure, mechanical impact, and equipment malfunction, affecting sewing quality and efficiency.
The device employs a stepper motor-driven wire-cutting presser foot structure. The first and second actuating components rotate via a drive unit, respectively stopping the wire-cutting and presser foot structures, thus achieving independent and precise control. Combined with an elastic material ring and limiting components, it reduces impact and wear, and enhances structural stability.
It improves the coordination and precision of thread cutting and presser foot movements, enhances sewing quality and efficiency, extends equipment lifespan, and reduces the risk of malfunction.
Smart Images
Figure CN224531232U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sewing equipment technology, and in particular discloses a stepper motor type thread cutter presser foot structure. Background Technology
[0002] In traditional industrial sewing equipment, the thread-cutting and presser foot actions typically rely on solenoid valves or electromagnets. Their working principle is based on electromagnetic induction, controlling the reciprocating motion of mechanical components through the switching of current. The solenoid valve, via a spring reset, enables the engagement and disengagement of the thread-cutting blade, as well as the lifting and lowering of the presser foot. However, factors such as spring fatigue, assembly tolerances, and lubrication failure can easily lead to reset failure. For example, when the thread-cutting blade is not fully reset, the needle bar driven by the spindle motor may strike the blade, posing a risk of needle breakage. Furthermore, the engagement and release process of the solenoid valve involves mechanical impact, which, with prolonged use, can lead to loose screws and bearing wear, ultimately causing equipment malfunctions. Therefore, a stepper motor-driven thread-cutting presser foot structure is provided to solve these problems. Utility Model Content
[0003] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a stepper motor type wire cutting foot structure.
[0004] To achieve the above objectives, the present invention provides a stepper motor-type wire cutting foot structure, including a driving component; the driving component is provided with a first actuating component, the first actuating component including a first coil body and a first stopping component provided on the first coil body, the first stopping component being used to stop the external wire cutting structure and the foot structure by rotation, so as to realize the wire cutting foot operation.
[0005] Preferably, the thread-cutting and presser foot structure further includes a second actuating member, which includes a second abutting member. The rotating shaft on the driving member protrudes from the free end faces of its two ends. The first abutting member and the second abutting member are respectively disposed at both ends of the rotating shaft. The first abutting member and the second abutting member are used to rotate and abut against the external thread-cutting structure and the presser foot structure, respectively. By setting the first abutting member and the second abutting member at both ends of the rotating shaft of the driving member, the rotation of the rotating shaft drives the two abutting members to act on the external thread-cutting structure and the presser foot structure, thereby achieving independent and precise control of the thread-cutting and presser foot actions. This realizes the coordinated and independent control of the thread-cutting operation and the presser foot operation, improves the coordination and accuracy of the thread-cutting and presser foot actions during sewing, and enhances sewing quality and efficiency.
[0006] Preferably, the first ring body is an open annular structure made of elastic material. A first limiting member is provided on the first ring body. The first limiting member is located at the end of the first ring body away from the first stop member. Designing the first ring body as an open annular structure of elastic material can play a buffering role during rotation and stopping, reducing the impact and wear on related components and extending the service life of the components. At the same time, the first limiting member is provided at the end away from the first stop member, which limits the range of motion of the first actuating member, preventing it from affecting the normal operation of the wire cutting presser foot structure due to excessive displacement, and ensuring the stability and reliability of the structure operation.
[0007] Preferably, the second stop is provided with a second ring body, and a second limiting member is provided at the end of the second ring body away from the second stop. The second ring body on the second stop and the second limiting member at the end away from the second stop correspond to the structure of the first actuating member, thereby limiting the range of motion of the second actuating member, preventing abnormal displacement during the rotation stop process, and ensuring that the second actuating member can accurately and stably drive the presser foot structure to move, further improving the overall stability and accuracy of the wire cutting presser foot structure.
[0008] Preferably, the first ring body and the second ring body have the same structure, the first limiting member and the second limiting member have the same structure, and both actuating members are integrally formed. The first ring body and the second ring body, the first limiting member and the second limiting member have the same structure, and the two actuating members are integrally formed, realizing the standardization and modular design of the actuating member structure. This facilitates mold development, processing and assembly, and quality control in the manufacturing process, and reduces production costs. At the same time, the integrally formed structure enhances the overall strength and stability of the actuating member, reduces the risk of failure caused by loose parts or poor fit, and improves the reliability and durability of the wire shearing presser foot structure.
[0009] Preferably, there are two first limiting members, which are located at both ends of the first ring body. The presence of two first limiting members at both ends of the first ring body further strengthens the limitation on the movement range of the first actuating member. By constraining the movement trajectory of the actuating member from both ends, it effectively prevents the member from deviating or wobbling during rotation, ensuring that the first actuating member can move accurately along the predetermined trajectory. This results in more reliable wire cutting action and improves the working accuracy and stability of the wire cutting presser foot structure.
[0010] Preferably, the thread-cutting presser foot structure further includes a first transmission structure. The first transmission structure includes a first rod for cooperating with the presser foot structure. A second rod is provided at the end of the first rod near the second actuating member. The second actuating member drives the first rod and the presser foot to move by abutting the second rod. By setting the first transmission structure including the first rod and the second rod, the second actuating member can drive the first rod and the presser foot to move by abutting the second rod, realizing the efficient transmission of power from the actuating member to the presser foot. This ensures that the presser foot can move accurately up and down or horizontally according to the design requirements, meeting the needs of pressing and releasing the fabric during the sewing process, and improving the quality and efficiency of the sewing operation.
[0011] Preferably, the thread-cutting presser foot structure also includes a second transmission structure. This second transmission structure drives a rotary shuttle or oscillating shuttle to work with the needle. By providing this second transmission structure to drive the rotary shuttle or oscillating shuttle in conjunction with the needle, the coordinated work of the needle and shuttle (rotary or oscillating shuttle) during sewing is achieved. Power is transmitted to the shuttle through the second transmission structure, allowing it to rotate or oscillate in rhythm with the needle's movement. This accurately hooks the loops formed by the top thread and interweaves with the bottom thread, thus creating a stable sewing stitch and ensuring the quality and effectiveness of the sewing operation.
[0012] Preferably, the thread-cutting presser foot structure also includes a third transmission structure. This third transmission structure works in conjunction with the needle to cut the top thread. The third transmission structure includes a cutter for cutting the top thread, which is rotatably mounted on an external frame. The cutter is arc-shaped. This third transmission structure, including the arc-shaped cutter, enables the cutting of the top thread in conjunction with the needle during sewing. The arc-shaped cutter design allows for smoother cutting into the top thread during rotation, improving cutting efficiency and accuracy. Simultaneously, the cutter's rotatable mounting on the external frame facilitates flexible control of its movement according to sewing rhythm and needs, ensuring the top thread cutting action is completed at the appropriate time, thus improving the automation and efficiency of the sewing operation.
[0013] Preferably, the third transmission structure further includes a cylinder, on which a ring gear is provided, and at the bottom end of the cutter a sector tooth is provided. The ring gear and the sector tooth are meshed together. The end of the first stop member is used to abut against the outer wall of the cylinder to realize the cutting operation. By providing a ring gear on the cylinder and a sector tooth at the bottom end of the cutter, and making the two mesh, and by using the end of the first stop member to abut against the outer wall of the cylinder to realize the cutting operation, the rotational motion of the drive member is converted into the rotational motion of the cutter. Furthermore, by precisely controlling the timing and force of the first stop member abutting against the cylinder, the cutting action of the cutter can be accurately controlled, ensuring the accuracy and reliability of the surface thread cutting, and improving the accuracy and stability of the surface thread cutting control of the thread cutting presser foot structure.
[0014] The beneficial effects of this utility model are as follows: In the stepper motor type wire cutting presser foot structure, the first actuating member mounted on it can rotate by providing rotational power through the driving member. The first ring of the first actuating member acts as the main rotating body, driving the first stop member to rotate. During the rotation, the first stop member stops the external wire cutting structure and presser foot structure, realizing the wire cutting presser foot operation. Through the rotational power transmission of the driving member, the first actuating member can accurately control the movement of the wire cutting presser foot, thereby ensuring the accuracy and stability of the wire cutting presser foot operation and achieving the effect of improving the precision and reliability of the wire cutting presser foot operation. Attached Figure Description
[0015] Figure 1 A schematic diagram of a sewing machine that uses this stepper motor-type thread-cutting presser foot structure; Figure 2 This is one of the schematic diagrams of the internal structure of the sewing machine according to this utility model; Figure 3 This is a disassembly diagram of the sewing machine structure of this utility model; Figure 4 This is a schematic diagram of the structure of the second actuating component of this utility model; Figure 5 This is one of the structural schematic diagrams of the first actuating component of this utility model; Figure 6 This is a plan view of the second actuating component of this utility model; Figure 7 This is the second schematic diagram of the first actuating component of this utility model; Figure 8 This is the second schematic diagram of the internal structure of the sewing machine according to this utility model.
[0016] The reference numerals in the figures include: 1. Driving component; 2. First actuating component; 3. Second actuating component; 4. First transmission structure; 5. Second transmission structure; 6. Machine head; 7. Third transmission structure; 21. First ring body; 22. First limiting component; 23. First abutting component; 31. Second ring body; 32. Second limiting component; 33. Second abutting component; 41. First rod body; 42. Second rod body; 43. Spherical component; 61. Machine base; 62. Protruding shell; 71. Cutting blade; 72. Cylinder body; 73. First rod body; 74. Second rod body. Detailed Implementation
[0017] 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.
[0018] Please see Figures 1 to 8As shown, the present invention discloses a stepper motor type wire cutting presser foot structure, including a driving component 1; the driving component 1 is provided with a first actuating component 2, the first actuating component 2 includes a first ring body 21 and a first stopping component 23 provided on the first ring body 21, the first stopping component 23 is used to stop the external wire cutting structure and presser foot structure by rotation, so as to realize the wire cutting presser foot operation.
[0019] Specifically, in the stepper motor type wire cutting presser foot structure, the drive component 1 provides rotational power, enabling the first actuating component 2 mounted on it to rotate. The first ring body 21 of the first actuating component 2 serves as the main rotating body, driving the first stop component 23 to rotate. During the rotation, the first stop component 23 stops the external wire cutting structure and presser foot structure, realizing the wire cutting presser foot operation. Through the rotational power transmission of the drive component 1, the first actuating component 2 can precisely control the movement of the wire cutting presser foot, thereby ensuring the accuracy and stability of the wire cutting presser foot operation and achieving the effect of improving the precision and reliability of the wire cutting presser foot operation.
[0020] Specifically, the thread-cutting presser foot structure also includes a second actuating member 3, which includes a second stop member 33. The rotating shaft on the driving member 1 protrudes from the free end faces of its two ends. The first stop member 23 and the second stop member 33 are respectively disposed at both ends of the rotating shaft. The first stop member 23 and the second stop member 33 are used to rotate and stop the external thread-cutting structure and the presser foot structure, respectively. By setting the first stop member 23 and the second stop member 33 at both ends of the rotating shaft of the driving member 1, the rotation of the rotating shaft drives the two stop members to act on the external thread-cutting structure and the presser foot structure, thereby achieving independent and precise control of the thread-cutting and presser foot actions. This realizes the coordinated and independent control of the thread-cutting operation and the presser foot operation, improves the coordination and accuracy of the thread-cutting and presser foot actions during sewing, and enhances sewing quality and efficiency.
[0021] Specifically, the stepper motor type wire cutting presser foot structure also includes a machine head 6, a machine platform 61 at the bottom of the machine head 6, and a protrusion 62 for use with the machine head 6, with a cover rotatably mounted on the protrusion 62.
[0022] Specifically, the first ring body 21 is an open annular structure made of elastic material. A first limiting member 22 is provided on the first ring body 21. The first limiting member 22 is located at the end of the first ring body 21 away from the first stop member 23. Designing the first ring body 21 as an open annular structure of elastic material can play a buffering role during rotation and stopping, reducing the impact and wear on related components and extending the service life of the components. At the same time, the first limiting member 22 is provided at the end away from the first stop member 23, which limits the range of motion of the first actuating member 2, preventing it from affecting the normal operation of the wire cutting presser foot structure due to excessive displacement, and ensuring the stability and reliability of the structure operation.
[0023] Specifically, the first stopper 23 is L-shaped, and the free end of the first stopper 23 is made of rubber.
[0024] Specifically, a second ring body 31 is provided on the second stop member 33, and a second limiting member 32 is provided at the end of the second ring body 31 away from the second stop member 33. The second ring body 31 is provided on the second stop member 33, and a second limiting member 32 is provided at the end of the second ring body 31 away from the second stop member 33. This corresponds to the structure of the first actuating member 2, thereby limiting the range of motion of the second actuating member 3 and preventing abnormal displacement during the rotation stop process. This ensures that the second actuating member 3 can accurately and stably drive the presser foot structure to move, further improving the overall stability and accuracy of the wire cutting presser foot structure.
[0025] Specifically, the second stopper 33 is semi-circular and hollow.
[0026] Specifically, the first ring 21 and the second ring 31 have the same structure, and the first limiting member 22 and the second limiting member 32 have the same structure. Both actuating members are integrally formed. The first ring 21 and the second ring 31, the first limiting member 22 and the second limiting member 32 have the same structure, and the two actuating members are integrally formed, realizing the standardization and modular design of the actuating member structure. This facilitates mold development, processing and assembly, and quality control in the manufacturing process, and reduces production costs. At the same time, the integrally formed structure enhances the overall strength and stability of the actuating member, reduces the risk of failure caused by loose parts or poor fit, and improves the reliability and durability of the wire shearing presser foot structure.
[0027] Specifically, there are two first limiting members 22, which are located at both ends of the first ring body 21. The two first limiting members 22 at both ends of the first ring body 21 further strengthen the limitation on the movement range of the first actuating member 2, constrain the movement trajectory of the actuating member from both ends, effectively prevent it from deviating or shaking during rotation, and ensure that the first actuating member 2 can move accurately according to the predetermined trajectory, thereby more reliably realizing the wire cutting action and improving the working accuracy and stability of the wire cutting presser foot structure.
[0028] Specifically, the thread-cutting presser foot structure also includes a first transmission structure 4. The first transmission structure 4 includes a first rod 41 for cooperating with the presser foot structure. A second rod 42 is provided at the end of the first rod 41 near the second actuating member 3. The second actuating member 3 drives the first rod 41 and the presser foot to move by abutting the second rod 42. By setting the first transmission structure 4 including the first rod 41 and the second rod 42, the second actuating member 3 can drive the first rod 41 and the presser foot to move by abutting the second rod 42. This achieves efficient power transmission from the actuating member to the presser foot, ensuring that the presser foot can move accurately up and down or horizontally according to the design requirements, meeting the needs of pressing and releasing the fabric during the sewing process, and improving the quality and efficiency of the sewing operation.
[0029] Specifically, a spherical component 43 is also provided at the end of the second rod 42.
[0030] Specifically, it is worth noting that an elastic element is also provided on the first rod 41 or the pressure foot. Since this is existing known technology, it will not be elaborated on here.
[0031] Specifically, the thread-cutting presser foot structure also includes a second transmission structure 5. This second transmission structure 5 drives a rotary shuttle or oscillating shuttle to work with the needle. By using this second transmission structure 5 to drive the rotary shuttle or oscillating shuttle to work with the needle, the coordinated operation of the needle and shuttle (rotary or oscillating shuttle) during sewing is achieved. Power is transmitted to the shuttle through the second transmission structure 5, allowing it to rotate or oscillate in rhythm with the needle, accurately hooking the loops formed by the top thread and weaving them with the bottom thread, thus creating a stable sewing stitch and ensuring the quality and effectiveness of the sewing operation.
[0032] Specifically, in this embodiment, a stepper motor-driven thread cutter foot structure sewing method uses lockstitch sewing. The needle carries the top thread through the fabric, and the shuttle (rotary shuttle or swing shuttle) hooks the loop formed by the top thread, interweaving with the bottom thread to form a lockstitch structure.
[0033] Specifically, the thread-cutting presser foot structure also includes a third transmission structure 7. This third transmission structure 7, used in conjunction with the needle via the drive unit 1, cuts the top thread. The third transmission structure 7 includes a cutter 71 for cutting the top thread. The cutter 71 is rotatably mounted on the external frame and is arc-shaped. This third transmission structure 7, including the arc-shaped cutter 71, enables the cutting of the top thread in conjunction with the needle during sewing. The arc-shaped cutter 71's design allows for smoother cutting of the top thread during rotation, improving cutting efficiency and accuracy. Simultaneously, the rotatable mounting of the cutter 71 on the external frame facilitates flexible control of its movement according to sewing rhythm and needs, ensuring the top thread cutting action is completed at the appropriate time, thus improving the automation and efficiency of the sewing operation.
[0034] Specifically, the third transmission structure 7 also includes a cylinder 72, on which a ring gear is provided, and a sector tooth is provided at the bottom end of the cutter 71. The ring gear and the sector tooth are meshed together. The end of the first stop member 23 is used to abut against the outer wall of the cylinder 72 to realize the operation of the cutter 71. By providing a ring gear on the cylinder 72 and a sector tooth at the bottom end of the cutter 71, and making the two mesh together, and by using the end of the first stop member 23 to abut against the outer wall of the cylinder 72 to realize the operation of the cutter 71, the rotational motion of the drive member 1 is converted into the rotational motion of the cutter 71. Furthermore, by precisely controlling the timing and force of the abutment between the first stop member 23 and the cylinder 72, the cutting action of the cutter 71 can be accurately controlled, ensuring the accuracy and reliability of the face wire cutting, and improving the precision and stability of the face wire cutting control of the cutter foot structure.
[0035] Specifically, the end of the first stopper 23 is a flexible part made of a material with a high coefficient of friction, and the cylinder 72 is also provided with an elastic part for resetting.
[0036] Specifically, in the second embodiment, the end of the first stopper 23 is a toothed block, which is meshed with a toothed disc. A worm is provided at the center of the toothed disc, and the worm is meshed with a worm wheel provided on the cylinder 72.
[0037] Specifically, in the third embodiment, a first rod 73 is rotatably disposed on the cylinder 72, a second rod 74 is rotatably disposed at the end of the first rod 73 away from the cylinder 72, and the end of the second rod 74 away from the first rod 73 is rotatably disposed on the machine base 61.
[0038] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of this utility model. The content of this specification should not be construed as a limitation of this utility model.
Claims
1. A stepper motor type wire cutting foot structure, comprising a driving component (1); characterized in that: The drive member (1) is provided with a first actuating member (2), which includes a first ring body (21) and a first stop member (23) provided on the first ring body (21). The first stop member (23) is used to stop the external wire cutting structure and the presser foot structure by rotating to realize the wire cutting presser foot operation.
2. The stepper motor type wire cutting foot structure according to claim 1, characterized in that: The wire-cutting presser foot structure also includes a second actuating member (3), which includes a second abutting member (33). The rotating shaft on the driving member (1) protrudes from the free end faces of the two ends. The first abutting member (23) and the second abutting member (33) are respectively disposed at both ends of the rotating shaft. The first abutting member (23) and the second abutting member (33) are respectively used to rotate and abut against the external wire-cutting structure and the presser foot structure.
3. The stepper motor type wire cutting foot structure according to claim 1, characterized in that: The first ring body (21) is an annular structure with an opening made of elastic material. A first limiting member (22) is provided on the first ring body (21). The first limiting member (22) is located at the end of the first ring body (21) away from the first stop member (23).
4. The stepper motor type wire cutting foot structure according to claim 2, characterized in that: The second stop (33) is provided with a second ring (31), and a second limiting member (32) is provided at the end of the second ring (31) away from the second stop (33).
5. The stepper motor type wire cutting foot structure according to claim 4, characterized in that: The first ring (21) and the second ring (31) have the same structure, the first limiting member (22) and the second limiting member (32) have the same structure, and both actuating members are formed by an integral structure.
6. The stepper motor type wire cutting presser foot structure according to claim 3, characterized in that: There are two first limiting members (22), and the two first limiting members (22) are located at both ends of the first ring body (21).
7. The stepper motor type wire cutting foot structure according to claim 2, characterized in that: The wire cutting presser foot structure also includes a first transmission structure (4), which includes a first rod (41) for cooperating with the presser foot structure. A second rod (42) is provided at one end of the first rod (41) near the second actuating member (3). The second actuating member (3) drives the first rod (41) and the presser foot to move by abutting the second rod (42).
8. The stepper motor type wire cutting presser foot structure according to claim 7, characterized in that: The thread-cutting presser foot structure also includes a second transmission structure (5), which is used to drive a rotating shuttle or a swing shuttle in conjunction with the needle.
9. The stepper motor type wire cutting presser foot structure according to claim 1, characterized in that: The thread-cutting presser foot structure also includes a third transmission structure (7), which is used to cut the thread by cooperating with the needle via the drive member (1). The third transmission structure (7) includes a cutter (71) for cutting the thread. The cutter (71) is rotatably mounted on the external frame and is arc-shaped.
10. A stepper motor type wire cutting foot structure according to claim 9, characterized in that: The third transmission structure (7) also includes a cylinder (72), on which a ring gear is provided, and a fan-shaped tooth is provided at the bottom end of the cutter (71). The ring gear and the fan-shaped tooth are meshed together, and the end of the first stop (23) is used to stop the outer wall of the cylinder (72) to realize the operation of the cutter (71).