A sewing machine upper waist correction mechanism

Abstract

This utility model relates to a sewing machine upper waist correction mechanism in the field of sewing machine technology. It includes an inner shaft drive motor, an outer shaft drive motor, and a motor mounting base. The correction component includes a sensor support rod and a laser sensor. One end of the inner shaft drive motor is connected to an angle adjustment component for adjusting the correction angle. By adding a sensor support rod and a laser sensor to the motor mounting base, material deviations can be corrected quickly and smoothly, avoiding oscillations caused by overshoot or backswing. Furthermore, the simplified structure improves the traditional cumbersome correction process, increasing work efficiency while reducing operating costs, maximizing benefits. On the other hand, the angle adjustment component can adjust the arc rotation range of the fabric, providing greater flexibility and adjustability compared to traditional flat conveyor belts for material transport or left-right swaying. Combined with laser sensor correction, it reduces the probability of material wrinkles and stacking.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to a waist correction mechanism for a sewing machine. Background Technology

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on fabric, fixing one or more layers of fabric together. Its function is to replace hand sewing of clothing, fabric or other materials. The sewing machine's overlock correction is a professional term specific to industrial sewing. It means that during the sewing process, the machine automatically detects and corrects the lateral position deviation of the material in the conveying direction, ensuring that it always enters the sewing area stably and accurately along the preset center line, thereby ensuring the straightness and uniformity of the sewing stitches and the quality of the product.

[0003] In existing small workshops, the correction process mainly relies on visual judgment and manual adjustment by operators. This method is inefficient, inaccurate, and inconsistent. In addition, most workshops use traditional sewing machine correction mechanisms, which are installed with or externally mounted sensors. However, this installation structure is temporarily fixed, making it prone to loosening, interference, inaccurate positioning, and unreliable measurement data. Furthermore, the structure needs to be adjusted and improved before use, increasing the number of steps and reducing work efficiency. To address these issues, the inventors have proposed a waist correction mechanism for sewing machines to solve the aforementioned technical problems of easy assembly and automated correction. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the aforementioned problems.

[0005] A waist correction mechanism for a sewing machine includes an inner shaft drive motor, an outer shaft drive motor, and a motor mounting base. The surface of the motor mounting base is provided with a correction component, which includes a sensor support rod and a laser sensor. One end of the sensor support rod is movably mounted on the surface of the motor mounting base, and one end of the sensor support rod abuts against the laser sensor. One end of the inner shaft drive motor is connected to an angle adjustment component for adjusting the correction angle. This structure adds a sensor support rod and a laser sensor to the motor mounting base. This structural design is an improved technology for adjusting position and stabilizing deviation, reducing the need for materials such as fabric, leather, and strips to remain in a preset center position during sewing, thereby ensuring sewing quality. The laser sensor detects the edge position of the material in real time and emits a deviation signal. Its working principle is to provide a laser emitter that emits a focused, visible laser beam, collects the laser reflected back from the surface of the object being measured, and the laser light undergoes diffuse reflection after irradiating the material surface. The internal photodetector can sense the position coordinates of the light spot on its photosensitive surface. When the visible beam deviates from the edge position of the detected material, the distance / working distance from the laser irradiation point to the sensor will change, causing the position of the reflected light spot on the photodetector to shift. The deviation is calculated through the internal system circuit of the laser sensor or through an external host controller. The deviation is converted into a standard analog or digital signal, which is then received by the external terminal host to make a feedback action. The angle adjustment component assists the inner shaft drive motor in making micro-angle adjustment commands to reduce correction lag. By preset the optimal angle, the response time of the correction system can be shortened, so that the material deviation can be corrected quickly and smoothly, avoiding the oscillation phenomenon caused by overshoot or swayback.

[0006] Furthermore, the angle adjustment component includes an outer shaft wheel and an inner shaft silicone ring. One end of the inner shaft drive motor is an inner drive shaft, and one end of the outer shaft drive motor is an outer drive shaft. One end of the inner drive shaft abuts against one end of the outer drive shaft, and the other end of the outer drive shaft abuts against the outer shaft wheel. The inner shaft silicone ring is installed inside the outer shaft wheel and protrudes from the surface of the outer shaft wheel. This structure converts the rotational power of the motor into a finely adjustable guiding force, increasing the stability of the material during the sewing process. When the outer shaft drive motor drives the outer drive shaft to move the sewing object, the directional movement is towards the sewing direction. The laser sensor continuously detects the edge alignment of the sewing object. When a deviation occurs, it feeds back the edge alignment of the sewing object to the external host. The host then promptly issues a command to instruct the inner shaft drive motor to drive it. The transmission force generated by the inner shaft drive motor drives the inner shaft silicone ring, causing the inner shaft silicone ring to carry the material or sewing object back to the predetermined track. This replaces the operator in making corresponding edge adjustments, automatically achieving a precise and effective correction process.

[0007] Furthermore, the surface of the outer shaft wheel is connected to a buffer elastic plate for reducing impact. The buffer elastic plate has an arc-shaped structure, and a buffer block is connected to the surface of the buffer elastic plate. The buffer block is equipped with a buffer spring for resetting and mitigating impact. The buffer elastic plate with an arc-shaped structure has good bending and torsional elasticity. When the material experiences sudden tension fluctuations or jumps due to motor start-stop, speed changes, or sudden changes in thickness at the joint, the buffer elastic plate can produce bending deformation within a certain range. This deformation buffer absorbs this part of the energy, preventing the impact from being directly transmitted to the outer shaft wheel. Moreover, the arc-shaped structure allows it to naturally conform to the surface of materials with different thicknesses or curvatures when under force, ensuring constant contact pressure and avoiding slippage or damage caused by uneven materials. As the component that comes into contact with the material between the buffer elastic plate and the material, the buffer block can increase the contact area with the material, reduce the pressure per unit area, and effectively prevent indentation or tearing of thin, soft, and fragile materials such as silk and non-woven fabric. When an impact occurs, the buffer block is pushed back to its original position by the elastic restoring force of the buffer spring, realizing automatic reset and waiting for the next buffering process, thus achieving a cyclical effect.

[0008] Furthermore, the surface of the motor mounting base is provided with a motor support base for supporting and positioning the inner shaft drive motor and the outer shaft drive motor. One end of the motor support base has a plate-shaped protrusion structure. This plate-shaped protrusion structure increases the moment of inertia of the motor support base, increases the installation position, and at the same time plays a role in dispersing stress, reducing the slight displacement or tilting of the motor due to torque reaction force during operation.

[0009] Furthermore, one end of both the inner shaft drive motor and the outer shaft drive motor is a transmission end. The surface of the transmission end is connected to a drive belt for assisting the movement of the inner and outer drive shafts. When the inner shaft drive motor generates transmission power, it drives the drive belt through the transmission end, and then drives the inner drive shaft, the outer drive shaft, and the inner shaft silicone ring to rotate, thereby causing the inner shaft silicone ring to drive the material or sewing object back to the predetermined track. The drive belt, as an intermediate transmission component, plays the role of increasing friction and adjusting the rotation speed.

[0010] Furthermore, one end of the motor mounting base is equipped with a lifting cylinder for auxiliary position lifting. The lifting cylinder acts as a linear actuator, with one end fixed to the external frame and the other end connected to the motor mounting base. When the lifting cylinder is energized and generates driving force, the piston rod inside the lifting cylinder is extended and retracted by controlling the on / off state and pressure of the air source / compressed air, thereby driving the entire motor mounting base, along with the inner / outer shaft drive motor and the correction component on it, to lift as a whole, thereby adjusting the lifting height. After the main unit completes the correction action for the sewn workpiece, the entire correction component is lifted to facilitate the mounting and dismounting of the sewn workpiece. After the next sewn workpiece is installed in place, the correction mechanism is lowered to start a new round of correction.

[0011] Furthermore, the sensor support rod is L-shaped, and the motor mounting base, sensor support rod, and laser sensor are detachable from each other. The vertical section of the L-shaped structure connects to the motor mounting base, and the horizontal section extends above the sewing material. This design allows the laser sensor to be precisely positioned directly above or to the side of the material's path, overcoming obstacles such as motors and transmission mechanisms, ensuring the optimal detection angle and maximizing functional extension. The detachable structure allows for quick installation or removal, enabling operators to perform partial replacements, significantly shortening on-site installation and debugging time, facilitating maintenance and replacement, and reducing maintenance costs.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by adding a sensor support rod and a laser sensor to the motor mounting base, the deviation is converted into a standard analog signal or digital signal, and then the external terminal host receives the signal and makes a feedback action to complete the correction action in the process. Then, in conjunction with the angle adjustment component, the inner shaft drive motor is assisted to make micro-angle adjustment commands, reducing the correction lag. By preset the optimal angle, the response time of the correction system can be shortened, so that the material deviation can be corrected quickly and smoothly, avoiding the oscillation phenomenon caused by overshoot or swingback. In addition, the simplified structure improves the traditional cumbersome correction process, increasing work efficiency while reducing operating costs and maximizing benefits. On the other hand, the angle adjustment component can adjust the arc rotation range of the fabric, which is more flexible and adjustable than the traditional flat conveyor belt for material transmission or left and right swinging. Combined with laser sensor for correction, it can reduce the probability of material wrinkles and stacking. This structure is applied to sewing scenarios such as waistbands and trouser bodies, casual tops and crew necks. During the sewing process, the process of correcting deviations in the connection and mating seams of the sewn parts can improve the accuracy and sensitivity of deviation correction, increase the flexibility of the equipment, and improve the phenomenon of untimely and incomplete deviation correction. Attached Figure Description

[0013] Figure 1 This is a 3D diagram of a waist correction mechanism for a sewing machine; Figure 2 This is another perspective view of a waist correction mechanism for a sewing machine; Figure 3 yes Figure 2 A magnified view of part A in the image; Figure 4 This is an axial view of a waist correction mechanism for a sewing machine; Figure 5 This is an exploded view of a waist correction mechanism for a sewing machine; In the diagram: Inner shaft drive motor-1, outer shaft drive motor-2, motor mounting base-3, sensor support rod-4, laser sensor-5, outer shaft wheel-6, inner shaft silicone ring-7, inner drive shaft-8, outer drive shaft-9, buffer elastic plate-10, buffer block-11, buffer spring-12, motor support base-13, transmission end-14, drive belt-15, lifting cylinder-16. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] For this embodiment, please refer to Figures 1-5 The specific implementation of the upper waist correction mechanism for a sewing machine includes an inner shaft drive motor 1, an outer shaft drive motor 2, and a motor mounting base 3. The surface of the motor mounting base 3 is provided with a correction component, which includes a sensor support rod 4 and a laser sensor 5. One end of the sensor support rod 4 is movably mounted on the surface of the motor mounting base 3, and one end of the sensor support rod 4 abuts against the laser sensor 5. One end of the inner shaft drive motor 1 is connected to an angle adjustment component for adjusting the correction angle. This structure adds a sensor support rod 4 and a laser sensor 5 to the motor mounting base 3. This structural design is an improved technology for adjusting position and stabilizing deviation, reducing the need for materials such as fabric, leather, and strips to remain in a preset center position during sewing, thereby ensuring sewing quality. The laser sensor 5 plays the role of detecting the edge position of the material in real time and emitting a deviation signal. Its working principle is to provide a laser emitter to emit a focused, visible laser beam, collect the laser reflected back from the surface of the object being measured, and after the laser shines on the material surface, diffuse reflection occurs. The internal photodetector can sense the position coordinates of the light spot on its photosensitive surface. When the visible beam deviates from the edge position of the detected material, the distance / working distance from the laser irradiation point to the sensor will change, causing the position of the reflected light spot on the photodetector to shift. The deviation is calculated through the internal system circuit of the laser sensor 5 or through the external host controller. The deviation is converted into a standard analog or digital signal, and then the external terminal host receives the signal and makes a feedback action. The angle adjustment component assists the inner shaft drive motor 1 in making micro-angle adjustment commands to reduce the correction lag. By preset the optimal angle, the response time of the correction system can be shortened, so that the material deviation can be corrected quickly and smoothly, avoiding the oscillation phenomenon caused by overshoot or swayback.

[0016] The angle adjustment assembly includes an outer shaft wheel 6 and an inner shaft silicone ring 7. One end of the inner shaft drive motor 1 is an inner drive shaft 8, and one end of the outer shaft drive motor 2 is an outer drive shaft 9. One end of the inner drive shaft 8 abuts against one end of the outer drive shaft 9, and the other end of the outer drive shaft 9 abuts against the outer shaft wheel 6. The inner shaft silicone ring 7 is installed inside the outer shaft wheel 6 and protrudes from the surface. This structure converts the rotational power of the motor into a finely adjustable guiding force, increasing the stability of the material during the sewing process. When the outer shaft drive motor 2 drives the outer drive shaft 9 to drive the sewing object, the directional movement is towards the sewing direction. The laser sensor 5 continuously detects the edge alignment of the sewing object. When a deviation occurs, it feeds back the edge alignment of the sewing object to the external host. The host then promptly issues a command to instruct the inner shaft drive motor 1 to drive it. The transmission force generated by the inner shaft drive motor 1 drives the inner shaft silicone ring 7, causing the inner shaft silicone ring 7 to carry the material or sewing object back to the predetermined track, replacing the operator to make corresponding edge adjustments and automatically achieving a precise and effective correction process.

[0017] The outer shaft wheel 6 is connected to a buffer elastic plate 10 for reducing impact. The buffer elastic plate 10 has an arc-shaped structure, and a buffer block 11 is connected to the surface of the buffer elastic plate 10. The buffer block 11 is equipped with a buffer spring 12 for resetting and reducing impact. The buffer elastic plate 10 with an arc-shaped structure has good bending and torsional elasticity. When the material experiences sudden tension fluctuations or jumps due to motor start-stop, speed changes, or sudden changes in thickness at the joint, the buffer elastic plate 10 can produce bending deformation within a certain range. This deformation buffer absorbs this part of the energy, preventing the impact from being directly transmitted to the outer shaft wheel 6. The arc-shaped structure allows it to naturally conform to the surface of materials with different thicknesses or curvatures when under force, ensuring constant contact pressure and avoiding slippage or damage caused by uneven materials. The buffer block 11, as the part that contacts the buffer elastic plate 10 with the material, can increase the contact area with the material, reduce the pressure per unit area, and effectively prevent indentation or tearing of thin, soft, and fragile materials such as silk and non-woven fabric. When the impact occurs, the buffer block 11 is pushed back to its original position by the elastic restoring force of the buffer spring 12, realizing automatic reset and waiting for the next buffering process, thus achieving a cyclical effect.

[0018] The surface of the motor mounting base 3 is provided with a motor support base 13 for supporting and positioning the inner shaft drive motor 1 and the outer shaft drive motor 2. One end of the motor support base 13 has a plate-shaped protrusion structure. This plate-shaped protrusion structure increases the moment of inertia of the motor support base 13, increases the installation position, and at the same time plays a role in dispersing stress, reducing the slight displacement or tilting of the motor due to torque reaction force during operation.

[0019] Both the inner shaft drive motor 1 and the outer shaft drive motor 2 have a transmission end 14 at one end. The surface of the transmission end 14 is connected to a drive belt 15 for assisting the inner drive shaft 8 and the outer drive shaft 9 in their movement. When the inner shaft drive motor 1 generates transmission power, it drives the drive belt 15 through the transmission end 14, and then drives the inner drive shaft 8, the outer drive shaft 9 and the inner shaft silicone ring 7 to rotate, thereby causing the inner shaft silicone ring 7 to drive the material or sewing object back to the predetermined track. The drive belt 15, as an intermediate transmission component, plays the role of increasing friction and adjusting the rotation speed.

[0020] One end of the motor mounting base 3 is equipped with a lifting cylinder 16 for auxiliary position lifting. The lifting cylinder 16 acts as a linear actuator, with one end fixed to the external frame and the other end connected to the motor mounting base 3. When the lifting cylinder 16 is energized to generate driving force, the piston rod inside the lifting cylinder 16 is extended and retracted by controlling the on / off state and pressure of the air source / compressed air, thereby driving the entire motor mounting base 3, together with the inner / outer shaft drive motor and the correction component on it, to lift as a whole, thereby adjusting the lifting height. After the main unit completes the correction action for the sewn workpiece, the entire correction component is lifted to facilitate the mounting and dismounting of the sewn workpiece. After the next sewn workpiece is installed in place, the correction mechanism is lowered to start a new round of correction.

[0021] The sensor support rod 4 is L-shaped, and the motor mounting base 3, sensor support rod 4, and laser sensor 5 are detachable from each other. The vertical section of the L-shaped structure connects to the motor mounting base 3, and the horizontal section extends above the sewing material. This design allows the laser sensor 5 to be accurately positioned directly above or to the side of the material's path, overcoming obstacles such as motors and transmission mechanisms, ensuring the best detection angle and maximizing its functionality. The detachable structure allows for quick installation or removal, enabling operators to replace parts of the sensor, significantly reducing on-site installation and debugging time, facilitating maintenance and replacement, and reducing repair costs.

[0022] The key design features of this invention are as follows: This structure adds a sensor support rod 4 and a laser sensor 5 to the motor mounting base 3. By converting the deviation into a standard analog or digital signal, the external terminal host receives the signal and makes a feedback action to complete the correction action in the process. Then, in conjunction with the angle adjustment component, it assists the inner shaft drive motor 1 in making micro-angle adjustment commands to reduce the correction lag. By preset the optimal angle, the response time of the correction system can be shortened, so that the material deviation can be corrected quickly and smoothly, avoiding the oscillation phenomenon caused by overshoot or swingback. In addition, the simplified structure improves the traditional cumbersome correction process, increasing work efficiency while reducing operating costs and maximizing benefits. On the other hand, the angle adjustment component can adjust the arc rotation range of the fabric, which is more flexible and adjustable than the traditional flat conveyor belt for material transmission or left and right swinging. Combined with the laser sensor 5 for correction, it can reduce the probability of material wrinkles and stacking.

[0023] The operation process of this utility model is as follows: the outer shaft drive motor 2 drives the outer drive shaft 9 to drive the sewing object. This movement is in the direction of sewing. The laser sensor 5 continuously detects the edge alignment of the sewing object. When a deviation occurs, it feeds back the edge alignment of the sewing object to the external host. The host then promptly issues a command to instruct the inner shaft drive motor 1 to drive the object. When the inner shaft drive motor 1 generates transmission power, it drives the drive belt 15 through the transmission end 14, and then drives the inner drive shaft 8, the outer drive shaft 9 and the inner shaft silicone ring 7 to rotate. The drive belt 15, as the intermediate transmission component, plays the role of increasing friction and adjusting the rotation speed, so that the inner shaft silicone ring 7 drives the material or sewing object back to the predetermined track, replacing the operator to make corresponding edge adjustments, and automatically achieving the process of precise and effective correction. The correction method adopted in this structure adds a circular arc correction method. Due to the arc structure of the outer shaft wheel 6, it can naturally conform to the material surface with different thicknesses or curvatures when subjected to force. When the fabric with curvature needs to be corrected, the structure works with the transmission end 14, the inner drive shaft 8, the outer drive shaft 9 and the inner shaft silicone ring 7 to rotate in a circle, which improves the traditional correction method of swinging left and right on a plane and enhances the flexibility of correction.

[0024] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A waist-correcting mechanism for a sewing machine, comprising an inner shaft drive motor, an outer shaft drive motor, and a motor mounting base, characterized in that: The surface of the motor mounting base is provided with a correction component, which includes a sensor support rod and a laser sensor. One end of the sensor support rod is movably mounted on the surface of the motor mounting base, and the other end of the sensor support rod abuts against the laser sensor. One end of the inner shaft drive motor is connected to an angle adjustment component for adjusting the correction angle.

2. The upper waist correction mechanism for a sewing machine according to claim 1, characterized in that: The angle adjustment assembly includes an outer shaft wheel and an inner shaft silicone ring. One end of the inner shaft drive motor is the inner drive shaft, and one end of the outer shaft drive motor is the outer drive shaft. One end of the inner drive shaft abuts against one end of the outer drive shaft, and the other end of the outer drive shaft abuts against the outer shaft wheel. The inner shaft silicone ring is installed inside the outer shaft wheel and protrudes from the surface of the outer shaft wheel.

3. The upper waist correction mechanism for a sewing machine according to claim 2, characterized in that: The surface of the outer axle wheel is connected to a buffer elastic plate for reducing impact. The buffer elastic plate has an arc-shaped structure, and a buffer block is connected to the surface of the buffer elastic plate. The buffer block is equipped with a buffer spring for resetting and mitigating impact.

4. A sewing machine upper waist correction mechanism according to any one of claims 1-3, characterized in that: The surface of the motor mounting base is provided with a motor support base for supporting and positioning the inner shaft drive motor and the outer shaft drive motor. One end of the motor support base has a plate-shaped protrusion structure.

5. The upper waist correction mechanism for a sewing machine according to claim 2, characterized in that: Both the inner shaft drive motor and the outer shaft drive motor have a transmission end at one end, and a drive belt for assisting the inner drive shaft and the outer drive shaft to move is connected to the surface of the transmission end.

6. A sewing machine upper waist correction mechanism according to any one of claims 1-3, characterized in that: One end of the motor mounting base is equipped with a lifting cylinder for assisting in position raising and lowering.

7. A sewing machine upper waist correction mechanism according to any one of claims 1-3, characterized in that: The sensor support rod is L-shaped, and the motor mounting base, sensor support rod, and laser sensor are detachable from each other.

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