Thread clamping and loosening device controlled by stepping motor
Through the wire clamping loosening device controlled by the stepper motor, the stability and cost problems of the electromagnet wire clamping device are solved, and the efficient and stable operation of the sewing machine is achieved and the production efficiency is improved.
Patent Information
- Application Number
- CN202421547636.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The existing electromagnet wire clamps have problems such as easy damage to loose wire pins, unstable contact, high cost, frequent use, easy to cause heat and burn, and fixed stroke, which affects the efficiency of the sewing machine and the stability of the equipment.
The stepper motor controls the clamping loosening device, and the fully automatic clamping loosening control and clamping force adjustment are achieved through the combination of stepper motor, cam, slide rod, return spring and buffer spring.
It improves the stability and efficiency of the clamping device, reduces maintenance costs, improves the suture tension and aesthetics of the stitching, and reduces equipment downtime and adjustment time.
Smart Images
Figure CN222948596U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of garment processing, in particular to a thread clamping and loosening device controlled by a stepping motor. Background Art
[0002] At present, there are two types of thread clamping devices in the sewing machine industry. One is to manually operate the thread clamp spring to adjust the thread clamping force, maintain the tightness of the suture during the sewing process, achieve stable sewing stitches, and avoid the bottom thread or top thread from loosening. The other is mostly electromagnet driven, controlled by the electromagnet. The electromagnet core is close to the loose thread pin and the opening and closing of the thread clamp can be controlled by the attraction of the electromagnet. The tension and loosening of the suture can be controlled accordingly to achieve stable sewing stitches and avoid the suture from loosening. At the same time, the length of the thread end can be controlled when cutting the thread, thereby improving the sewing quality and efficiency.
[0003] During the operation of the sewing machine, the manually adjusted thread clamp can only meet the ordinary sewing process, but cannot meet the sewing requirements of mid-to-high-end models, which is not conducive to improving the efficiency of the garment factory. For the electromagnetic thread clamp, each time before the hook hook ends, the thread clamp electromagnet needs to be energized, and the iron core pushes the thread release pin to make the two thread clamps release the stitches. After the power is off, the spring resets. The electromagnetic thread clamp we are using now has the following main problems:
[0004] 1. Every time the electromagnet is powered on, the iron core pushes the thread-releasing pin to push open the retaining ring, and the left and right thread clamps release the sutures. In the long run, the thread-releasing pin is easy to be damaged, and the contact between the retaining ring and the thread-releasing pin is similar to point contact, and the contact area is small. At the same time, the magnetic field of the electromagnet is changing after power is turned on, which is not stable enough, which will affect the tension of the thread clamp and the change of the thread tension, affecting the beauty of the suture traces.
[0005] 2. In order to achieve stable clamping and loosening action, the electromagnet is usually required to have a large-sized coil and armature, and the cost of the electromagnet is high;
[0006] 3. In order to achieve stable clamping and loosening force, the on-off current of the electromagnet is very large. Frequent use may cause the electromagnet to heat up and burn, which is not conducive to improving the efficiency of the clothing production line and has high equipment maintenance costs;
[0007] 4. The stroke of the electromagnet is fixed, and it can only control the opening and closing of the wire clamp. When adjusting the clamping force of the wire clamp, it is necessary to manually adjust the wire clamp knob, which consumes workers' time and reduces equipment efficiency. Summary of the invention
[0008] In view of the above problems existing in the existing wire clamps, the present invention aims to provide a wire clamping and loosening device controlled by a stepping motor with high stability, low cost and high efficiency.
[0009] The specific technical solutions are as follows:
[0010] A stepping motor controlled thread clamping and loosening device, used for being installed on an industrial sewing machine body, comprises:
[0011] A stepper motor, wherein the stepper motor is mounted on the industrial sewing machine body, and an output end of the stepper motor is transmission-connected with a cam;
[0012] A fixed clamping plate, the fixed clamping plate is mounted on the body of the industrial sewing machine;
[0013] A slide bar, the slide bar can be installed on the industrial sewing machine body in a transversely slidable manner, one end of the slide bar abuts against the outer circumferential surface of the cam, and the other end coaxially slides through the fixed clamping plate and is connected to a movable clamping plate, and the movable clamping plate is arranged opposite to the fixed clamping plate;
[0014] A return spring is sleeved on the outside of the slide bar and is arranged between one end of the slide bar and the body of the industrial sewing machine.
[0015] As a further improvement and optimization of this solution, the movable clamp is elastically connected to the other end of the sliding rod.
[0016] As a further improvement and optimization of this solution, the other end of the sliding rod has a threaded section, the external thread of the threaded section is installed with an adjusting knob, the movable splint is arranged between the fixed splint and the adjusting knob, and the movable splint is elastically connected to the adjusting knob through an elastic member.
[0017] As a further improvement and optimization of the present solution, the elastic member is a buffer spring, which is sleeved outside between the slide rods, with one end connected to the movable splint and the other end connected to the adjusting knob.
[0018] As a further improvement and optimization of this solution, the industrial sewing machine body has a fixed block, the fixed clamp is installed on the fixed block, and the other end of the sliding rod slides through the fixed block, the fixed clamp, and the movable clamp in sequence to be threadedly connected to the adjusting knob.
[0019] As a further improvement and optimization of this solution, one end of the slide rod has a resistance block, the resistance block resists against the outer circumferential surface of the cam, and one end of the return spring resists against the resistance block and the other end resists against the industrial sewing machine body.
[0020] As a further improvement and optimization of the present solution, the cross-sections of the fixed clamping plate and the movable clamping plate are both trapezoidal structures.
[0021] As a further improvement and optimization of the present solution, the bottom of the industrial sewing machine body is provided with an industrial sewing machine table.
[0022] Compared with the prior art, the above technical solution has the following positive effects:
[0023] (1) The utility model replaces the original manual thread clamping device by means of a motor controller, a stepping motor, a cam, a sliding rod, a reset spring and a buffer spring, etc., and can realize fully automatic thread clamping and loosening control as well as thread clamping force control, thus providing support for the thread tension control and stitch aesthetics improvement of ordinary industrial sewing machines.
[0024] (2) The utility model reduces the cost of high-power electromagnets and current consumption and saves energy by replacing the original electromagnet-type wire clamping device. The electromagnets generate heat due to long-term high-load operation, which causes losses and performance degradation. The implementation of this embodiment can improve equipment stability and reduce maintenance costs.
[0025] (3) The utility model controls the thread clamping and loosening of the thread clamp through the cam structure of a stepping motor. The accurate response of the stepping motor can ensure that the thread clamping device completes the corresponding action within the specified time, avoiding the instability of the thread clamping and loosening caused by the influence of the magnetic force of the electromagnet and the point contact between the thread loosening pin and the retaining ring. The stepping motor perfectly guarantees the control accuracy and the timeliness and accuracy of the return, reducing the need to stop the sewing machine for rethreading and adjusting the thread clamping knob of the thread clamp. Through this embodiment, the thread clamping force can be adjusted in real time, greatly improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a schematic diagram of the installation of a stepper motor controlled wire clamping and loosening device of the utility model;
[0027] Figure 2 This is a schematic diagram of the structure of a stepper motor controlled wire clamping and loosening device of the utility model;
[0028] Figure 3 This is a schematic diagram of the connection between the slide bar and the movable clamping plate of a stepping motor-controlled wire clamping and loosening device of the utility model;
[0029] In the attached drawings: 1. Industrial sewing machine body; 2. Stepper motor; 3. Cam; 4. Slide rod; 5. Return spring; 6. Movable splint; 7. Fixed splint; 8. Buffer spring; 9. Fixed block; 11. Industrial sewing machine table; 41. Adjustment knob; 42. Resistance block; 43. Threaded section. DETAILED DESCRIPTION
[0030] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0033] Figure 1 This is a schematic diagram of the installation of a stepper motor controlled wire clamping and loosening device of the utility model. Figure 2 This is a schematic diagram of the structure of a stepper motor controlled wire clamping and loosening device of the utility model. Figure 3 This is a schematic diagram of the connection between the slide bar and the movable clamping plate of a stepping motor controlled wire clamping and loosening device of the utility model, as shown in FIG. Figure 1-3 As shown, a stepper motor controlled thread clamping and loosening device of a preferred embodiment is shown, which is used to be installed on an industrial sewing machine body 1, including a stepper motor 2, a fixed clamp plate 7, a slide bar 4 and a reset spring 5. The stepper motor 2 is installed on the industrial sewing machine body 1, and its output end is transmission-connected with a cam 3. The fixed clamp plate 7 is installed on the industrial sewing machine body 1. The slide bar 4 can be installed on the industrial sewing machine body 1 in a transversely slidable manner. One end of the slide bar 4 is abutted against the outer circumferential surface of the cam 3, and the other end coaxially slides through the fixed clamp plate 7 to be connected to a movable clamp plate 6. The movable clamp plate 6 is arranged opposite to the fixed clamp plate 7. The reset spring 5 is sleeved on the outside of the slide bar 4 and is arranged between one end of the slide bar 4 and the industrial sewing machine body 1.
[0034] In this embodiment, when the suture needs to be clamped, the stepper motor 2 rotates and drives the cam 3 to rotate, so that one end of the slide bar 4 slides along the convex surface of the cam 3 toward the circumferential surface, and under the elastic force of the return spring 5, the slide bar 4 slides horizontally to the left, and at the same time drives the movable splint 6 to move close to the fixed splint 7. When one end of the slide bar 4 abuts against the circumferential surface of the cam 3, the movable splint 6 contacts the fixed splint 7, and the suture is in a clamped state.
[0035] When the suture needs to be loosened, the cam 3 is continued to be rotated so that one end of the slide bar 4 slides along the circumferential surface of the cam 3 toward the raised surface, and the slide bar 4 moves horizontally to the right, while driving the movable splint 6 to move away from the fixed splint 7. When the slide bar 4 moves to the top of the raised surface of the cam 3, the movable splint 6 is completely separated from the fixed splint 7, and the suture is in a loosened state.
[0036] In this embodiment, the cam 3 is driven to rotate by the stepper motor 2, and the movable clamp 6 is driven to move closer to or away from the fixed clamp 7 by the joint action of the slide rod 4 and the return spring 5 to clamp or loosen the suture. It has not only a simple structure and low cost, but also high stability.
[0037] More preferably, the thread clamping and loosening device also includes a motor controller, which is electrically connected to the stepper motor 2. The click controller is used to drive the stepper motor 2, effectively ensuring the continuous movement of the motion mechanism and avoiding the inability of the thread clamp to clamp and loosen the thread due to external force. The motor controller controls the angular displacement by the number of electric pulses given to the stepper motor 2, and controls the pulse frequency to control the speed and acceleration of the motor rotation, so as to achieve the purpose of accurate positioning and rapid response speed regulation. Under the precise control of the motor controller, every movement of the sewing machine's thread clamping device can be controlled without being affected by the magnetic force of the electromagnet. The length of the needle surface thread is stable, the stitch maintains a certain aesthetic quality, and it is not easy to get off the thread, thereby improving the work efficiency of workers. There is no need to worry about equipment safety and loss caused by long-term power-on.
[0038] Furthermore, as a preferred embodiment, in order to improve the clamping effect on the suture, the movable clamping plate 6 is elastically connected to the other end of the sliding rod 4.
[0039] Furthermore, as a preferred embodiment, the other end of the slide rod 4 has a threaded section 43, the external thread of the threaded section 43 is installed with an adjusting knob 41, the movable splint 6 is arranged between the fixed splint 7 and the adjusting knob 41, and the movable splint 6 is elastically connected to the adjusting knob 41 through an elastic member.
[0040] In this embodiment, the position of the adjusting knob 41 on the threaded section 43 can be adjusted by rotating the adjusting knob 41, thereby adjusting the clamping force of the movable clamping plate 6 to meet different suture clamping requirements, and the embodiment has high applicability.
[0041] Furthermore, as a preferred embodiment, the elastic member is a buffer spring 8 , which is sleeved outside between the slide bars 4 , with one end connected to the movable splint 6 and the other end connected to the adjusting knob 41 .
[0042] When the suture is clamped, the stepper motor 2 drives the cam 3 to rotate, so that one end of the slide rod 4 slides along the raised surface of the cam 3 toward the circumferential surface. When the movable splint 6 is already in close contact with the fixed splint 7, the slide rod 4 continues to move to the left under the action of the elastic force of the reset spring 5. The movement of the slide rod 4 will drive the adjustment knob 41 to compress the buffer spring 8 to the left. By controlling the rotation position of the cam 3, the force applied by the adjustment buffer spring 8 to the movable splint can be controlled in real time.
[0043] Furthermore, as a preferred embodiment, the industrial sewing machine body 1 has a fixed block 9, the fixed splint 7 is installed on the fixed block 9, and the other end of the slide rod 4 slides through the fixed block 9, the fixed splint 7, and the movable splint 6 in sequence to be threadedly connected to the adjusting knob 41.
[0044] Furthermore, as a preferred embodiment, one end of the slide rod 4 has a resistance block 42, the resistance block 42 resists against the outer circumferential surface of the cam 3, and one end of the return spring 5 resists against the resistance block 42 and the other end resists against the industrial sewing machine body 1.
[0045] Furthermore, as a preferred embodiment, the cross-sections of the fixed clamping plate 7 and the movable clamping plate 6 are both trapezoidal structures.
[0046] Furthermore, as a preferred embodiment, the bottom of the industrial sewing machine body 1 has an industrial sewing machine table 11 .
[0047] This embodiment replaces the original manual thread clamping device with a stepper motor 2, a cam 3, a slide rod 4, a reset spring 5 and a buffer spring 8, which can realize fully automatic thread clamping and loosening control as well as thread clamping force control, and provide support for the thread tension control and stitch aesthetics improvement of ordinary industrial sewing machines.
[0048] This embodiment reduces the cost of high-power electromagnets and current consumption and saves energy by replacing the original electromagnet-type wire clamping device. The electromagnets generate heat due to long-term high-load operation, which causes losses and performance degradation. The implementation of this embodiment can improve equipment stability and reduce maintenance costs.
[0049] The present embodiment controls the thread clamping and thread loosening of the thread clamp through the cam 3 structure of a stepping motor 2. The accurate response of the stepping motor 2 can ensure that the thread clamping device completes the corresponding action within the specified time, avoiding the instability of the thread clamping and thread loosening caused by the influence of the magnetic force of the electromagnet and the point contact between the thread loosening pin and the retaining ring. The stepping motor 2 perfectly guarantees the control accuracy, timeliness and accuracy of the return, reduces the need to stop the sewing machine for rethreading and adjust the thread clamping knob of the thread clamp, and the present embodiment can also realize real-time regulation of the thread clamping force, greatly improving the production efficiency.
[0050] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. A stepper motor controlled thread clamping and loosening device, used for installation on an industrial sewing machine body, characterized in that: include: A stepper motor, wherein the stepper motor is mounted on the industrial sewing machine body, and an output end of the stepper motor is transmission-connected with a cam; A fixed clamping plate, the fixed clamping plate is mounted on the body of the industrial sewing machine; A slide bar, the slide bar can be installed on the industrial sewing machine body in a transversely slidable manner, one end of the slide bar abuts against the outer circumferential surface of the cam, and the other end coaxially slides through the fixed clamping plate and is connected to a movable clamping plate, and the movable clamping plate is arranged opposite to the fixed clamping plate; A return spring is sleeved on the outside of the slide bar and is arranged between one end of the slide bar and the body of the industrial sewing machine.
2. The stepper motor controlled wire clamping and loosening device according to claim 1, characterized in that: The movable clamp is elastically connected to the other end of the slide rod.
3. According to claim 2, the stepper motor controlled wire clamping and loosening device is characterized in that: The other end of the slide rod has a threaded section, the external thread of the threaded section is installed with an adjusting knob, the movable clamping plate is arranged between the fixed clamping plate and the adjusting knob, and the movable clamping plate is elastically connected to the adjusting knob through an elastic member.
4. The stepper motor controlled wire clamping and loosening device according to claim 3, characterized in that: The elastic member is a buffer spring, which is sleeved outside between the slide bars, with one end of the buffer spring connected to the movable clamping plate and the other end of the buffer spring connected to the adjusting knob.
5. The stepper motor controlled wire clamping and loosening device according to claim 4, characterized in that: The industrial sewing machine body is provided with a fixed block, the fixed clamping plate is installed on the fixed block, and the other end of the slide rod sequentially slides through the fixed block, the fixed clamping plate, and the movable clamping plate to be threadedly connected with the adjusting knob.
6. The stepper motor controlled wire clamping and loosening device according to claim 1, characterized in that: One end of the slide bar is provided with a resistance block, the resistance block is against the outer circumferential surface of the cam, and one end of the return spring is against the resistance block, and the other end is against the body of the industrial sewing machine.
7. The stepper motor controlled wire clamping and loosening device according to claim 1, characterized in that: The cross sections of the fixed clamping plate and the movable clamping plate are both trapezoidal structures.
8. The stepper motor controlled wire clamping and loosening device according to claim 1, characterized in that: The bottom of the industrial sewing machine body is provided with an industrial sewing machine table.