T-shirt cuffing apparatus with cutter

Abstract

The present application relates to the auxiliary equipment of clothing production, specifically a kind of T-shirt cuff equipment with cutting knife trimming, including sewing machine fixed in the rack table top, left wheel unit and right wheel unit are respectively arranged in its left and right sides, and trimming unit is arranged in the surrounding area between the two.The trimming unit trimming motor is arranged on the sewing machine above needle plate, motor shaft is fixedly connected with shaft sleeve, shaft sleeve cooperates with sliding block, sliding block is fixedly connected with shaft pin, and shaft sleeve is screwed with top wire to adjust the eccentricity of shaft pin.There is fixed knife on the right side of needle plate, which is embedded to the left, and the blade is flush with needle plate, and forms shear pair with hook-shaped movable knife, the driving end of movable knife is connected with trimming driving shaft, which is connected with shaft pin through swing lever and connecting rod, to realize trimming operation on small size surrounding area of clothing.The present application changes the traditional mode of lower motor, greatly saves space, and solves the problem that small size cuff sewing is difficult to realize due to space limitation.

Description

Technical Field

[0001] This invention relates to auxiliary equipment for garment production, specifically a T-shirt cuff trimming device with a cutting blade. Background Technology

[0002] In the garment manufacturing industry, precision and efficiency in the sewing process have always been key objectives pursued by the industry. While traditional garment sewing equipment can basically meet production needs when processing standard-sized fabrics, the challenges of sewing small, enclosed areas such as necklines and cuffs are becoming increasingly prominent as garment styles become more diverse and consumers' demands for quality continue to rise.

[0003] The applicant previously disclosed a garment hem circular sewing device under publication number CN110607611A, which includes a coverstitch machine fixed on a machine frame table, with a left rotating wheel and a right rotating wheel respectively arranged on the left and right sides of the coverstitch machine. The annular hem of the garment rotates under the drive of the left and right rotating wheels, and the coverstitch machine performs circular sewing on the hem in a fully boning state. However, compared with the hem, the enclosed area formed on the garment parts where the neckline and cuffs are located is smaller in size, with a significant difference in size order, a more complex shape, and higher requirements for precision and flexibility. This local small size characteristic makes it difficult for existing garment hem circular sewing devices to be directly applied to local small enclosed areas such as the neckline and cuffs during the processing and manufacturing process.

[0004] In addition, the applicant has also disclosed a dual worm gear guiding cloth-dragging device under publication number CN 215517902 U. Because the drive pulley of the shaft near the roller is located inside the steering pulley, this layout limits the miniaturization of the roller diameter from both a mechanical and spatial perspective. When dealing with sewing operations in small spaces such as necklines and cuffs, the large equipment size and structural dimensions limit its effective functionality and make it impossible to meet the processing requirements of small enclosed areas.

[0005] Furthermore, existing technologies lack automated trimming capabilities for small, enclosed areas. In production practice, manual trimming is time-consuming, labor-intensive, and extremely inefficient. It is also heavily influenced by human factors such as worker skill level and concentration, making it difficult to ensure consistent and high-precision trimming results. Uneven fabric edges not only increase the complexity and cost of subsequent processing steps but also hinder large-scale standardized production due to poor quality stability, contradicting the modern apparel industry's pursuit of high quality, personalization, and rapid response to market demands. Summary of the Invention

[0006] To overcome the deficiencies or one of the deficiencies of the prior art, this invention discloses a sealing device specifically for small-sized enclosed areas of clothing, and the technical solution adopted is as follows: A device for trimming the cuffs of T-shirts with a cutting blade includes a sewing machine fixed to a machine frame table. A left wheel unit, a right wheel unit, and a trimming unit for the enclosed area located between the left and right wheel units are respectively arranged on the left and right sides of the sewing machine. Unlike existing technologies, the trimming unit for the enclosed area includes a trimming motor mounted on the sewing machine above the needle plate. A bushing is fixedly connected to the motor shaft of the trimming motor. The bushing slides radially with a slider. The slider is fixedly connected to a pin. A set screw that abuts against the slider is screwed onto the bushing. To adjust the eccentricity between the shaft pin and the motor shaft of the trimming motor, one end of the shaft pin is connected to the connecting rod; a fixed knife is fixedly installed on the right side of the needle plate of the sewing machine, embedded to the left in the needle plate, near the presser foot, with its blade flush with the needle plate; the fixed knife and the hook-shaped movable knife form a shearing pair; the driving end of the movable knife is fixedly connected to the trimming drive shaft with the axial direction in the front-back direction; the trimming drive shaft is rotatably mounted on the machine body on the right side of the needle plate of the sewing machine; one end of the trimming drive shaft is fixedly connected to the swing arm; the other end of the swing arm is connected to the other end of the connecting rod.

[0007] Furthermore, the left wheel unit includes a left rotating wheel, and the right wheel unit includes a right rotating wheel. The upper rims of the left and right rotating wheels are basically flush with the needle plate plane of the sewing machine. After the small-sized encircling area of ​​the garment is fitted onto the left and right rotating wheels, it is held in place by the left rotating wheel, which can move left and right, and rotates under the drive of the right rotating wheel and / or the left rotating wheel of the left rotating wheel. The diameter of the left rotating wheel is within 25mm, and the diameter of the right rotating wheel is within 45mm. The left rotating wheel can abut against the needle plate of the sewing machine, and the right rotating wheel is within 70mm of the edge of the needle plate of the sewing machine.

[0008] Furthermore, it also includes a garment support unit disposed on the frame below the needle plate of the sewing machine, which enables the rest of the garment to rotate with the small encircling area without sagging.

[0009] Furthermore, the garment support unit includes a receiving basin and a fixed plate fixedly connected to the frame below the needle plate of the sewing machine. A follower motor is fixedly installed below the fixed plate, and a follower shaft is rotatably mounted above the fixed plate via a bearing. The motor shaft of the follower motor is fixedly connected to the follower shaft. The follower motor rotates synchronously with the right wheel motor that drives the right wheel, so that the remaining part of the garment in the receiving basin can rotate clockwise or counterclockwise as the small enclosed area rotates.

[0010] Furthermore, a trimming suction pipe is fixed to the right side of the needle plate of the sewing machine, and the suction port of the trimming suction pipe is close to the movable knife and covers the movement range of the movable knife; a guide plate is arranged on the machine body to the left of the trimming suction pipe and below the needle plate to assist in unfolding the fabric.

[0011] Furthermore, the right wheel unit also includes a correction mechanism disposed on the right rotating wheel and a photoelectric sensor disposed on the right side of the right rotating wheel. The photoelectric sensor transmits the collected signals to the control device, and the control device drives the correction mechanism to correct the small-sized encircling area of ​​the garment fitted on the right rotating wheel.

[0012] Further, the right-hand wheel includes a front wheel and a rear wheel fixedly connected to the front wheel, and the correction mechanism is disposed on the rear wheel; the rear wheel includes a front end plate, a front intermediate plate, five sector-shaped support blocks, a rear intermediate plate, and a rear end plate fixedly connected from front to back. The rear end plate extends rearward to form a sleeve, and a worm shaft driven by a correction motor is rotated inside the sleeve. A worm is fixed at the inner end of the worm shaft. The worm is located in a worm receiving cavity opened at the middle of the opposite ends of the rear intermediate plate and the rear end plate. Five worm wheel receiving grooves are evenly opened radially on the rear end face of the rear intermediate plate and the front end face of the rear end plate, and one worm wheel is rotated in each worm wheel receiving groove. These worm wheels mesh with the worm. At the same time, a wheel-passing receiving groove is opened on the front end face of the rear intermediate plate corresponding to each worm wheel receiving groove, and one wheel-passing receiving groove is rotated in each wheel-passing receiving groove. Each of the following is a set of intermediate wheels, which includes an intermediate wheel body that meshes with the worm gear. The intermediate wheel body has semi-circular annular grooves on both sides. Each of the sector-shaped support blocks has a pulley shaft receiving groove on both sides of its front end. A pulley is transferred between two adjacent sector-shaped support blocks through the pulley shaft receiving groove. Each pulley has two semi-circular annular grooves corresponding to the two semi-circular annular grooves. Two endless circular belts are wound around each pulley and each corresponding intermediate wheel.

[0013] Furthermore, the sector-shaped support block has an outer circular surface with the same curvature as the rear interplate and the rear endplate; the front interplate extends rearward to form an arc-shaped guard plate that extends into the space between the two adjacent endless circular belts between the two adjacent sector-shaped support blocks, and the arc-shaped guard plate has an outer circular surface with the same curvature as the rear interplate and the rear endplate.

[0014] Furthermore, the right wheel unit also includes a hemming mechanism, which includes a hemming roller disposed behind the rear wheel, a hemming plate disposed on the frame corresponding to the hemming roller, and a plurality of air blowing pipes having air blowing holes that blow towards the small enclosed area of ​​the garment.

[0015] Furthermore, the left wheel unit includes a linear module fixed on the frame with a stroke in the left-right direction. The sliding part of the linear module is fixed to a left wheel seat. A left wheel motor is fixed on the left wheel seat. The left wheel seat extends to the right to form a cantilever. The left wheel is rotated at the free end of the cantilever. The left wheel is connected to the motor shaft of the left wheel motor via a synchronous belt. The cantilever gradually tapers from left to right, and the left wheel is in the shape of a round rod.

[0016] The following are the beneficial technical effects of this invention compared with the prior art: 1. Adaptable to Small Enclosed Areas: Existing technologies present challenges in sewing small enclosed areas of garments, such as necklines and cuffs. For example, traditional garment hem circular sewing devices are difficult to apply directly to small enclosed areas due to differences in size and shape complexity; dual worm gear correction and dragging devices cannot meet the needs of sewing operations in confined spaces due to structural layout limitations. The sewing device of this invention is specifically designed for small enclosed areas of garments. Through its unique structural layout, it effectively solves the problems of insufficient precision and flexibility when sewing small enclosed areas, better adapting to the complex shapes and high precision requirements of these areas.

[0017] 2. Optimized space utilization: The trimming motor of the trimming unit in the enclosed area is placed on the sewing machine above the needle plate, which changes the traditional method of placing the motor below, greatly saving space and solving the problem of difficulty in sewing small-sized cuffs due to space limitations. At the same time, the fixed knife set on the right side of the sewing machine needle plate is embedded into the needle plate to the left, close to the presser foot, and with the blade flush with the needle plate, which further reduces the space occupation, making the layout of the entire device more compact and reasonable, and more suitable for the operation space of small enclosed areas.

[0018] 3. Automated Trimming: Existing technologies lack automated trimming capabilities for small, closed-off areas, resulting in inefficient and inconsistent quality during manual trimming. This invention achieves automated trimming through a closed-off area trimming unit. The trimming motor drives a movable blade to engage with a fixed blade via components such as bushings, sliders, pins, connecting rods, and swing arms, trimming small, closed-off areas of the garment. This automated trimming method is unaffected by human error, ensuring consistent and high-precision trimming results, improving production efficiency, reducing subsequent processing costs, and facilitating large-scale standardized production, aligning with the development trend of the modern garment industry. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 yes Figure 1 The front view.

[0021] Figure 3 yes Figure 1 Top view.

[0022] Figure 4 This is a schematic diagram showing the orientation of the trimming unit of the enclosed area of ​​the present invention on a sewing machine.

[0023] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0024] Figure 6This is a schematic diagram of the structure of the revolver unit of the present invention.

[0025] Figure 7 This is a schematic diagram of the structure of the right wheel unit of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of the right-hand rotating wheel of the present invention.

[0027] Figure 9 yes Figure 8 A cross-sectional structural diagram.

[0028] Figure 10 This is a schematic diagram showing the separation of the components of the right-hand rotating wheel of the present invention.

[0029] Figure 11 yes Figure 10 A magnified view of a section at point B in the middle.

[0030] Figure 12 yes Figure 10 A magnified view of a section at point C.

[0031] Figure 13 This is a schematic diagram of the component separation from another perspective of the right-hand wheel of the present invention.

[0032] Figure 14 yes Figure 13 A magnified view of a section at point D.

[0033] Figure 15 yes Figure 13 A magnified view of a section at point E in the middle.

[0034] Figure 16 This is a schematic diagram of the worm gear and guide wheel of the present invention. Detailed Implementation

[0035] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figure 1-16 As shown, a T-shirt cuff trimming device with a cutting blade includes a sewing machine 100 fixed on a machine frame table. A left wheel unit 200, a right wheel unit 300, and a trimming unit 500 for a surrounding area located between the left wheel unit 200 and the right wheel unit 300 are respectively arranged on the left and right sides of the sewing machine 100. The trimming unit 500 includes a trimming motor 501 mounted on the sewing machine 100 above a needle plate 101. A bushing 502 is fixedly connected to the motor shaft of the trimming motor 501. A slider 503 slides radially through the bushing 502. A pin 504 is fixedly connected to the slider 503. A set screw is screwed onto the bushing 502 to abut against the slider 503 for adjustment. The eccentricity of the shaft pin 504 and the motor shaft of the trimming motor 501 is adjusted, and one end of the shaft pin 504 is connected to the connecting rod 505. A fixed blade 506 is fixedly installed on the right side of the needle plate 101 of the sewing machine 100, embedded to the left in the needle plate 101, near the presser foot, and with its blade flush with the needle plate 101. The fixed blade 506 and the hook-shaped movable blade 507 form a shearing pair. The driving end of the movable blade 507 is fixedly connected to the trimming drive shaft 508 with the axial direction in the front-back direction. The trimming drive shaft 508 is rotatably mounted on the machine body on the right side of the needle plate 101 of the sewing machine 100. One end of the trimming drive shaft 508 is fixedly connected to the swing rod 509, and the other end of the swing rod 509 is connected to the other end of the connecting rod 505.

[0039] The left wheel unit 200 includes a left rotating wheel 201, and the right wheel unit 300 includes a right rotating wheel 301. The upper rims of the left rotating wheel 201 and the right rotating wheel 301 are basically flush with the plane of the needle plate 101 of the sewing machine 100. After the small-sized encircling area of ​​the garment is fitted onto the left rotating wheel 201 and the right rotating wheel 301, it is held tight by the left rotating wheel 201, which can move left and right, and rotates under the drive of the right rotating wheel 301 and / or the left rotating wheel 201. The diameter of the left rotating wheel 201 is within 25mm, and the diameter of the right rotating wheel 301 is within 45mm. The left rotating wheel 201 can abut against the needle plate 101 of the sewing machine 100, and the right rotating wheel 301 is within 70mm of the edge of the needle plate 101 of the sewing machine 100.

[0040] I. Basic Principles of Rotary Support and Rotation 1. Support positioning: This seam-sealing device primarily relies on the left-hand rotating wheel 201 in the left wheel unit 200 and the right-hand rotating wheel 301 in the right wheel unit 300 to support small-sized enclosed areas of the garment (such as the neckline and cuffs). When the small-sized enclosed area of ​​the garment is placed over the left-hand rotating wheel 201 and the right-hand rotating wheel 301, the left-hand rotating wheel 201 provides tension. The left-hand rotating wheel 201 has the characteristic of lateral displacement, which allows it to flexibly adjust its position according to the enclosed area of ​​different sizes and shapes. For example, for garments with wider necklines, the left-hand rotating wheel 201 can move appropriately to the right, more closely fitting and supporting the neckline edge, ensuring the garment remains stable during subsequent operations. This adjustment capability allows the device to adapt to diverse small-sized enclosed areas of garments, improving its versatility.

[0041] 2. Rotary drive: The right-hand wheel 301 and / or the left-hand wheel 201 are responsible for rotating the small area of ​​the garment. The upper rims of the left-hand wheel 201 and the right-hand wheel 301 are flush with or slightly higher than the plane of the needle plate 101 of the sewing machine 100. This height design ensures that the area of ​​the garment enclosed on it can rotate with a stable trajectory and appropriate speed when the wheels rotate.

[0042] The diameter of the left rotating wheel 201 is controlled within 25mm, and the diameter of the right rotating wheel 301 is within 45mm. This smaller wheel size is specifically designed to accommodate small, enclosed areas such as necklines and cuffs. Compared to traditional larger rotating wheels, the smaller wheels in this device can more precisely control the movement of the garment when operating in small, enclosed areas, avoiding the inflexibility issues caused by excessively large wheels. For example, when sewing cuffs, the smaller wheels can better conform to the curve of the cuff, keeping the cuff stable during rotation, thereby improving sewing precision and quality.

[0043] II. The sewing operation principle of a sewing machine 1. Location adaptation: The sewing machine 100 is the core of the entire device, responsible for sewing small, closed areas of the garment. The left roller 201 abuts against the needle plate 101 of the sewing machine 100, while the right roller 301 is within 70mm of the edge of the needle plate 101. This arrangement ensures the closed area of ​​the garment is optimally positioned during sewing. The left roller 201 abutting against the needle plate 101 ensures stable support for the garment near the sewing needle, while the limited distance between the right roller 301 and the edge of the needle plate 101 guarantees accurate operation of the closed area within the sewing machine's working range. This layout design allows the sewing machine 100's needle to precisely sew the closed area of ​​the garment.

[0044] 2. Seam sealing procedure: During the lining process, the sewing machine 100 operates according to pre-set parameters and modes. These parameters and modes are set according to the style of the garment, the fabric, and the specific requirements of the lining, such as the thread density and stitch size. The sewing machine 100 creates the lining effect by passing the thread through a small enclosed area of ​​the garment, utilizing the interlacing of the needle and thread to meet the sewing and decorative needs of the garment. For example, for the neckline of some high-end garments, finer stitches may be used to improve the aesthetics and durability of the neckline.

[0045] III. Principles of Collaborative Work 1. Linear velocity matching and smooth rotation: During the lining process, the right rotating wheel 301 and the left rotating wheel 201 work together to support and drive the small, enclosed area of ​​the garment in a rotary motion. To ensure the garment does not slip between itself and the wheels during rotation, ideally, the linear velocities of the garment in contact with the right and left rotating wheels 301 should be equal. This is because if the linear velocities are inconsistent, the garment will slip or wrinkle on the wheels, affecting the lining quality. For example, if the linear velocity of the right rotating wheel 301 is greater than the linear velocity of the garment in contact with it, the garment may be stretched and deformed; conversely, the garment may pile up on the wheels. Only when the linear velocities are equal can the garment rotate smoothly with the wheels, ensuring the stability of the lining operation.

[0046] 2. Rear wheel displacement and tension adjustment: The left-right displacement function of the left-hand rotating wheel 201 in the left-hand wheel unit 200 not only supports the area enclosed by the garment but also adjusts the tension of the garment. When the left-hand rotating wheel 201 moves to the left or right, its tension position and force on the garment change. For example, when the left-hand rotating wheel 201 moves to the left, it increases the tension on the left side of the garment, making the garment tighter on the wheel; conversely, moving to the right decreases the tension on the left side, adjusting the tension of the garment. This adjustment ensures that the garment consistently follows the wheel's movement stably during the seaming process, avoiding seaming problems caused by the garment being too loose or too tight, such as crooked seams or uneven stitches.

[0047] In another preferred embodiment, a garment support unit 400 is further included, which is disposed on the frame below the needle plate 101 of the sewing machine 100. The garment support unit 400 enables the remaining part of the garment to rotate with the small-sized enclosed area without sagging. Specifically, the garment support unit 400 includes a receiving basin 401 and a fixing plate 402 fixedly connected to the frame below the needle plate 101 of the sewing machine 100. A follower motor 403 is fixedly mounted below the fixing plate 402, and a follower shaft 404 is rotatably mounted above the fixing plate 402 via a bearing. The motor shaft of the follower motor 403 is fixedly connected to the follower shaft 404. The follower motor 403 and the right-hand wheel motor 302 that drives the right-hand wheel 301 rotate synchronously, so that the remaining part of the garment in the receiving basin 401 can rotate clockwise or counterclockwise with the rotation of the small-sized enclosed area. During the sewing operation, the rotational movement of the garment's encircling area and the rotation of the receiving basin 401 are synchronized, ensuring coordinated movement between the two. This synchronized rotation avoids additional friction, pulling, or misalignment caused by uncoordinated movement, making the entire sewing process smoother and reducing quality problems such as uneven stitching and localized garment deformation caused by asynchronous movement. The fixing plate 402 is fixedly connected to the frame below the needle plate 101 of the sewing machine 100, providing a stable support foundation for the entire garment rotation support unit 400. Through the fixing plate 402, the follower motor 403 and the follower shaft 404 are securely mounted on the equipment. This not only ensures that the follower motor 403 will not shift or shake during operation, but also provides stable support for the rotation of the follower shaft 404. The bearing configuration further optimizes the rotational performance of the follower shaft 404, enabling it to maintain flexible and smooth rotation even under certain axial and radial loads, thereby ensuring the rotational stability of the receiving basin 401. The synchronous rotation of the follower motor 403 and the right-hand rotary motor 302 ensures a smoother coordination between the rotational motion driven by the rotary wheel and the auxiliary rotation of the receiving basin 401 during the garment sewing process. This coordinated operation allows the sewing process to maintain optimal performance at different rotational and sewing speeds. Whether dealing with necklines, cuffs, or other small-sized enclosed areas, it results in more even stitches and more accurate dimensions. Furthermore, the stability and precision of this structure reduce sewing interruptions or repetitive operations caused by structural vibrations or component displacements, improving sewing efficiency and ensuring better quality. This helps meet the high-precision and rapid production requirements for sewing small-sized enclosed areas in garment manufacturing, ultimately enhancing overall product quality and production efficiency.

[0048] In another preferred embodiment, a trimming suction pipe 510 is fixed to the right side of the needle plate 101 of the sewing machine 100. The suction port of the trimming suction pipe 510 is close to the movable blade 507 and covers the range of motion of the movable blade 507. A guide plate 511 is arranged on the machine body to the left of the trimming suction pipe 510 and below the needle plate 101 to assist in spreading the fabric. During the trimming operation, the movable blade 507 cuts the edge of the small-sized enclosed area of ​​the garment, generating a large amount of fabric debris. At this time, the trimming suction pipe 510 plays a key role in cleaning and waste disposal. Its suction port can promptly suck up the debris, effectively keeping the working area clean and preventing debris from accumulating around the equipment. This avoids interference with subsequent sewing and trimming operations, such as preventing debris from entering the equipment and affecting normal operation, or mixing into the sewing area and affecting the sewing and trimming quality. Because debris can be cleaned up promptly, operators do not need to frequently stop the machine for cleaning, improving the overall efficiency of the sewing device. This also reduces product quality issues caused by debris interference, ensuring the cleanliness and appearance of the garments. A guide plate 511 is installed on the machine body to the left of the trimming suction pipe 510 and below the needle plate 101 to assist in unfolding the garment fabric in small enclosed areas. During garment sewing, especially for fabric in small enclosed areas, which are small in area and have special shapes, wrinkles and twists are prone to occur during feeding, severely affecting sewing accuracy and quality. At this time, the guide plate 511 plays a crucial role. Its cleverly designed position on the machine body to the left of the trimming suction pipe 510 and below the needle plate 101 ensures that the guide plate 511 comes into contact with the fabric when it enters the sewing stage. The guide plate 511 has a smooth surface, which reduces friction with the fabric and prevents the fabric from being scratched or excessively worn during movement. Meanwhile, its unique shape and angle are carefully designed to apply a certain guiding force to the fabric, allowing it to unfold smoothly in the predetermined direction and position when entering the sewing area above the needle plate 101. In this way, the fabric guide plate 511 effectively avoids problems such as wrinkles and accumulation of the fabric, providing a flat and stable fabric base for subsequent trimming and overlocking operations, thereby improving the precision and quality of sewing and ensuring the aesthetics and practicality of the finished garment.

[0049] In another preferred embodiment, the right wheel unit 300 further includes a correction mechanism disposed on the right rotating wheel 301 and a photoelectric sensor 304 disposed on the right side of the right rotating wheel 301. The photoelectric sensor 304 transmits the collected signals to a control device, which drives the correction mechanism to correct the deviation of the small-sized enclosed area of ​​the garment fitted on the right rotating wheel 301. This preferred embodiment aims to solve the problem of positional deviation that may occur when using a sewing device to process the small-sized enclosed area of ​​garments, ensuring the accuracy and consistency of the sewing position. The photoelectric sensor 304 is disposed on the right side of the right rotating wheel 301, and its main function is to monitor the position information of the small-sized enclosed area of ​​the garment. During the sewing process, the photoelectric sensor 304 continuously collects the position signal of the small-sized enclosed area of ​​the garment. Since the enclosed area of ​​the garment rotates on the right rotating wheel 301, the photoelectric sensor 304 can sense the positional change of the area in real time during the rotation process. This position signal can be information such as reflection, refraction, or obstruction of light signals. The photocell 304 converts this information into electrical or digital signals to provide a data basis for subsequent correction operations.

[0050] In another preferred embodiment, the right-hand wheel 301 includes a front wheel 30101 and a rear wheel 30102 fixedly connected to the front wheel, and the steering mechanism is disposed on the rear wheel 30102; the rear wheel 30102 includes a front disc 30103, a front intermediate disc 30104, five fan-shaped support blocks 30105, a rear intermediate disc 30106, and a rear disc 30107 fixedly connected from front to rear, and the rear disc 30107 extends rearward to form A sleeve 30108 is provided, within which a worm shaft 30109 driven by a correction motor 303 is connected. A worm 30110 is fixed to the inner end of the worm shaft 30109. The worm 30110 is located within a worm receiving cavity 30111 formed at the midpoint of the opposite ends of the rear interplate 30106 and the rear endplate 30107. The rear end face of the rear interplate 30106 and the front end face of the rear endplate 30107 are evenly spaced radially with 5... Each worm gear receiving groove 30112 has a worm gear 30113 rotating within it, and these worm gears 30113 mesh with the worm 30110. Simultaneously, the front end face of the rear interplate 30106 has a passing gear receiving groove 30114 corresponding to each worm gear receiving groove 30112, and a worm gear 30113 rotating within each passing gear receiving groove 30114... Each guide wheel 30115 includes an intermediate wheel body 301151 meshing with the worm gear 30113, with semi-circular annular grooves 301152 on both sides of the intermediate wheel body 301151. Each sector support block 30105 has pulley shaft receiving grooves 30116 on both sides of its front end. Adjacent sector support blocks 30105 are connected by pulley shaft receiving grooves 30116 via pulley shaft receiving grooves 30116. Each pulley 30117 has two semi-circular annular grooves corresponding to the two semi-circular annular grooves 301152. Two endless circular belts 30118 are wound around each pulley 30117 and its corresponding guide wheel 30115. The right-hand drive wheel 301 consists of a front wheel 30101 and a rear wheel 30102 fixedly connected to it. This structural design provides the basis for the installation and operation of the subsequent correction mechanism. The rear wheel 30102 is a relatively complex structure, consisting of a front disc 30103, a front intermediate disc 30104, five sector-shaped support blocks 30105, a rear intermediate disc 30106, and a rear disc 30107, which are fixedly connected from front to rear. These components together form the overall frame of the rear wheel 30102, providing support and mounting positions for the internal transmission and steering mechanisms. The rear disc 30107 extends rearward to form a sleeve 30108, which provides a transition position for the worm shaft 30109, allowing the worm shaft 30109 to rotate stably within it.The worm shaft 30109 is driven by the alignment motor 303, and its internal worm 30110 is located within the worm receiving cavity 30111, which is formed at the midpoint of the opposite ends of the rear intermediate plate 30106 and the rear end plate 30107. Five worm wheel receiving slots 30112 are evenly formed radially on the rear end face of the rear intermediate plate 30106 and the front end face of the rear end plate 30107. Each worm wheel receiving slot 30112 contains one worm wheel 30113, and these worm wheels 30113 mesh with the worm 30110. This worm-worm wheel transmission system can transmit the rotational power of the alignment motor 303 to the worm wheels 30113. The worm-worm wheel transmission has a large transmission ratio and self-locking characteristics, enabling precise angle and speed adjustments, providing a precise transmission basis for alignment operations. When the correction motor 303 rotates, the worm gear 30110 drives the worm wheel 30113 to rotate, providing power and precise transmission control for subsequent correction actions. The front end of the rear disc 30106 has a wheel receiving groove 30114 corresponding to each worm wheel receiving groove 30112, and each wheel receiving groove 30114 houses a wheel 30115. The wheel 30115 includes an intermediate wheel body 301151 meshing with the worm wheel 30113, with semi-circular annular grooves 301152 on both sides of the intermediate wheel body 30151. Each sector support block 30105 has pulley shaft receiving grooves 30116 on both sides of its front end, and a pulley 30117 is connected between two adjacent sector support blocks 30105 via the pulley shaft receiving grooves 30116. Each pulley 30117 has two semi-circular grooves corresponding to two semi-circular grooves 301152, and two endless circular belts 30118 are wound around each pulley 30117 and its corresponding guide pulley 30115. The arrangement of the guide pulleys 30115, pulleys 30117, and endless circular belts 30118 serves two purposes: firstly, it enables the transmission and distribution of power; secondly, by adjusting the tension and position of the endless circular belts 30118, it influences the position of the small-sized encircling area of ​​the garment on the right-hand rotating pulley 301, thereby achieving a correction function. When the worm gear 30113 rotates, it drives the guide pulley 30115 to rotate, which in turn drives the movement of the pulleys 30117 and the endless circular belts 30118, ultimately achieving the correction operation for the small-sized encircling area of ​​the garment. In summary, the rear wheel 30102 of the right-hand wheel 301 in this preferred embodiment is a complex and ingenious structure. Through the coordinated work of components such as the worm gear-worm wheel transmission, the guide wheel and the pulley system, the correction mechanism can precisely adjust the position and movement of the endless circular belt 30118, thereby correcting the small-sized enclosed area of ​​the garment fitted on the right-hand wheel 301, ensuring the accurate position of the garment during the sewing process, and improving the sewing quality and product quality.

[0051] In another preferred embodiment, the fan-shaped support block 30105 has an outer circular surface with the same curvature as the rear interplate 30106 and the rear endplate 30107. This design ensures better continuity and consistency in the overall structure of the right-hand roller 301. The identical curvature allows the outer surface of the right-hand roller 301 to form a relatively smooth transition from the rear interplate 30106 to the rear endplate 30107 and then to the fan-shaped support block 30105 during rotation, avoiding stress concentration and uneven movement that may occur due to inconsistent curvature. During the seaming process, when the small-sized encircling area of ​​the garment rotates on the right-hand roller 301, this smooth transition allows for smoother fabric movement on the surface, reducing fabric stretching or twisting caused by uneven structural surfaces, thus improving the quality and stability of the seaming. The front disc 30104 extends rearward to form an arc-shaped guard plate 30119 that extends between two adjacent endless circular belts 30118 and between two adjacent fan-shaped support blocks 30105. The arc-shaped guard plate 30119 has an outer circular surface with the same curvature as the rear disc 30106 and the rear disc 30107. Its main function is to provide protection and guidance for the endless circular belts 30118. During operation, the endless circular belts 30118 may deviate or sway due to centrifugal force or other external forces. The arc-shaped guard plate 30119 can limit the range of motion of the endless circular belts 30118, prevent them from swinging excessively, and ensure the stability of the endless circular belts 30118 during operation. At the same time, the outer circular surface with the same curvature also ensures the coordination with the overall structure of the right turn wheel 301, avoiding additional friction or damage to the small-sized enclosed area of ​​the garment, making the seaming operation safer and more stable.

[0052] In another preferred embodiment, the right wheel unit 300 further includes a hemming mechanism, which includes a hemming roller disposed after the rear wheel 30102, a hemming plate disposed on the frame corresponding to the hemming roller, and multiple air pipes with air inlets for blowing towards the small-sized encircling area of ​​the garment. The hemming roller, disposed after the rear wheel 30102, plays a basic mechanical guiding role during the hemming process. One side of its upper outer surface has a large rounded corner, and the other side has a large beveled angle. The front section of the large beveled angle gradually extends forward and upward to form a curved slope. The hemming plate includes a straight rod portion and a flat plate portion that gradually widens to the left. The straight rod portion extends towards the hemming roller, and the flat plate portion has a cavity through which the air pipes communicate. Multiple air outlets are provided on the front end face of the flat plate portion. When the fabric of the small-sized encircling area of ​​the garment is conveyed to the position of the hemming roller as the rear wheel rotates, the hemming roller, due to its tile-shaped structure and rotatable characteristics, contacts the fabric and generates friction. This friction causes the fabric to move across its surface. Simultaneously, the position and angle design of the hemming rollers allow the fabric to begin initial hemming in a predetermined manner during this movement, preparing for subsequent hemming shaping. A hemming plate, corresponding to the hemming rollers, is mounted on the frame. The hemming plate has a specific shape and position; as the fabric approaches the hemming plate under the influence of the hemming rollers, the plate further constrains and guides the fabric. It precisely bends the fabric edge, initially folded by the hemming rollers, to the appropriate angle and position according to design requirements, making the fabric edge shape more regular and forming a hemmed shape that meets process standards, providing a precise hemming foundation for subsequent sewing processes. Multiple air tubes are distributed in appropriate positions, each with inflation holes that blow air towards the small enclosed area of ​​the garment. During the hemming process, the air tubes blow airflow into the fabric through the inflation holes. On the one hand, airflow can help shape the fabric being folded, especially for some thin and soft fabrics. Airflow can help the fabric better conform to the shape of the folding roller and folding board, making the folding smoother and more natural. On the other hand, airflow can also clean up debris and dust on the fabric surface in time, keeping the fabric clean and preventing these impurities from affecting the quality of the folding and subsequent sewing, ensuring the smooth progress of the entire boning process, thereby improving the sewing quality of the small-sized enclosed area of ​​the garment.

[0053] In another preferred embodiment, the left wheel unit 200 includes a linear module 202 fixed to the frame with a left-right travel. The sliding portion of the linear module 202 is fixedly connected to a left rotating wheel seat 203. A left rotating wheel motor 204 is fixedly mounted on the left rotating wheel seat 203. The left rotating wheel seat 203 extends to the right to form a cantilever 205. The free end of the cantilever 205 is fitted with the left rotating wheel 201. The left rotating wheel 201 is connected to the motor shaft of the left rotating wheel motor 204 via a synchronous belt. This design provides the left rotating wheel 201 with the ability to move left and right. When sewing small areas of garments of different sizes and shapes, the position of the left rotating wheel 201 can be flexibly changed by adjusting the position of the left rotating wheel seat 203 through the linear module 202. This allows the device to better adapt to different garment parts, such as collars or cuffs of different sizes, improving the versatility and adaptability of the entire sewing device. The cantilever 205 tapers gradually from left to right, and the left rotating wheel 201 is rod-shaped. This shape design helps optimize the spatial layout, reduces the space occupied in operation, and reduces the overall weight while ensuring structural strength, avoiding the impact on the operational flexibility of the left rotating wheel 201 due to an excessively heavy or large cantilever structure. The left rotating wheel motor 204 provides rotational power to the left rotating wheel 201, transmitting power to the left rotating wheel 201 via a synchronous belt, enabling the left rotating wheel 201 to rotate, thereby supporting and driving the small-sized encircling area of ​​the garment to rotate. The rod-shaped design of the left rotating wheel 201 allows for better contact with the small-sized encircling area of ​​the garment, evenly supporting the fabric, while facilitating the movement and rotation of the fabric on its surface.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A T-shirt cuff trimming device with a cutting blade, comprising a sewing machine (100) fixed on a machine frame table, a left wheel unit (200), a right wheel unit (300), and a trimming unit (500) for the enclosed area located between the left wheel unit (200) and the right wheel unit (300) respectively arranged on the left and right sides of the sewing machine (100), characterized in that, The enclosed area trimming unit (500) includes a trimming motor (501) mounted on the sewing machine (100) above the needle plate (101). A bushing (502) is fixed to the motor shaft of the trimming motor (501). The bushing (502) is radially slidably fitted with a slider (503). The slider (503) is fixedly connected to a pin (504). A set screw is screwed onto the bushing (502) to abut against the slider (503) to adjust the eccentricity between the pin (504) and the motor shaft of the trimming motor (501). The pin (504) is connected to one end of a connecting rod (505). A fixed blade (506) is fixedly installed on the right side of the needle plate (101), which is embedded to the left in the needle plate (101), near the presser foot, and with its blade flush with the needle plate (101). The fixed blade (506) and the hook-shaped movable blade (507) form a shearing pair. The driving end of the movable blade (507) is fixedly connected to the trimming drive shaft (508) with the axial direction in the front-back direction. The trimming drive shaft (508) is rotatably mounted on the machine body on the right side of the needle plate (101) of the sewing machine (100). The trimming drive shaft (508) is fixedly connected to one end of the swing rod (509), and the other end of the swing rod (509) is rotatably connected to the other end of the connecting rod (505).

2. The T-shirt cuff trimming device with a cutter as described in claim 1, characterized in that, The left wheel unit (200) includes a left rotating wheel (201), and the right wheel unit (300) includes a right rotating wheel (301). The upper rims of the left rotating wheel (201) and the right rotating wheel (301) are basically flush with the plane of the needle plate (101) of the sewing machine (100). After the small-sized encircling area of ​​the garment is fitted onto the left rotating wheel (201) and the right rotating wheel (301), it is held tight by the left rotating wheel (201) which can move left and right, and in the... The left wheel (201) of the right wheel (301) and / or the left wheel (201) drives the downward rotational motion. The diameter of the left wheel (201) is within 25 mm, and the diameter of the right wheel (301) is within 45 mm. The left wheel (201) can abut against the needle plate (101) of the sewing machine (100), and the right wheel (301) is within 70 mm from the edge of the needle plate (101) of the sewing machine (100).

3. The T-shirt cuff trimming device with a cutter as described in claim 2, characterized in that, It also includes a garment support unit (400) disposed on a frame below the needle plate (101) of the sewing machine (100), the garment support unit (400) being able to allow the rest of the garment to rotate with the small enclosed area without sagging.

4. The T-shirt cuff trimming device with a cutter as described in claim 3, characterized in that, The garment support unit (400) includes a receiving basin (401) and a fixed plate (402) fixed to the frame below the needle plate (101) of the sewing machine (100). A follower motor (403) is fixed below the fixed plate (402), and a follower shaft (404) is rotatably mounted above the fixed plate (402) via a bearing. The motor shaft of the follower motor (403) is fixed to the follower shaft (404). The follower motor (403) and the right wheel motor (302) that drives the right wheel (301) rotate synchronously, so that the rest of the garment in the receiving basin (401) can rotate clockwise or counterclockwise as the small enclosed area rotates.

5. The T-shirt cuff trimming device with a cutter according to claim 3, characterized in that, A trimming suction pipe (510) is fixed on the right side of the needle plate (101) of the sewing machine (100). The suction port of the trimming suction pipe (510) is close to the movable knife (507) and covers the range of motion of the movable knife (507). A guide plate (511) is arranged on the machine body on the left side of the trimming suction pipe (510) and below the needle plate (101) to assist in unfolding the fabric.

6. The T-shirt cuff trimming device with a cutter according to claim 2, characterized in that, The right wheel unit (300) also includes a correction mechanism disposed on the right wheel (301) and a photoelectric sensor (304) disposed on the right side of the right wheel (301). The photoelectric sensor (304) transmits the collected signal to the control device, and the control device drives the correction mechanism to correct the small-sized encircling area of ​​the garment fitted on the right wheel (301).

7. A T-shirt cuff trimming device with a cutter according to claim 6, characterized in that, The right-hand wheel (301) includes a front wheel (30101) and a rear wheel (30102) fixedly connected to the front wheel. The correction mechanism is disposed on the rear wheel (30102). The rear wheel (30102) includes a front disc (30103), a front intermediate disc (30104), five fan-shaped support blocks (30105), a rear intermediate disc (30106), and a rear disc (30107) fixedly connected from front to back. The rear disc (30107) extends rearward to form a sleeve (301). 08), the worm shaft (30109) driven by the correction motor (303) is transferred inside the sleeve (30108). The inner end of the worm shaft (30109) is fixed with a worm (30110). The worm (30110) is located in the worm receiving cavity (30111) opened in the middle of the opposite ends of the rear interplate (30106) and the rear end plate (30107). The rear end face of the rear interplate (30106) and the front end face of the rear end plate (30107) are evenly opened radially with 5 Each worm gear receiving slot (30112) has a worm gear (30113) rotating within it, and these worm gears (30113) mesh with the worm (30110). Simultaneously, the front end face of the rear interplate (30106) has a passing wheel receiving slot (30114) corresponding to each worm gear receiving slot (30112), and a worm gear (30113) rotating within each passing wheel receiving slot (30114) has a worm gear (30113) rotating within it. Each of the following is a series of pulleys (30115): the pulley (30115) includes an intermediate wheel body (301151) that meshes with the worm gear (30113), and the intermediate wheel body (301151) has semi-circular annular grooves (301152) on both sides; each of the sector-shaped support blocks (30105) has a pulley shaft receiving groove (30116) on both sides of its front end; a pulley (30117) is transferred between two adjacent sector-shaped support blocks (30105) through the pulley shaft receiving groove (30116); each pulley (30117) has two semi-circular annular grooves corresponding to the two semi-circular annular grooves (301152); and two endless circular belts (30118) are wound around each pulley (30117) and each corresponding pulley (30115).

8. The T-shirt cuff trimming device with a cutter according to claim 7, characterized in that, The sector-shaped support block (30105) has an outer circular surface with the same curvature as the rear interplate (30106) and the rear end plate (30107); the front interplate (30104) extends rearward to form an arc-shaped guard plate (30119) that extends into the space between two adjacent endless circular belts (30118) between two adjacent sector-shaped support blocks (30105), and the arc-shaped guard plate (30119) has an outer circular surface with the same curvature as the rear interplate (30106) and the rear end plate (30107).

9. A T-shirt cuff trimming device with a cutter according to claim 7, characterized in that, The right wheel unit (300) also includes a folding mechanism, which includes a folding roller disposed behind the rear wheel (30102), a folding plate disposed on the frame corresponding to the folding roller, and a plurality of air blowing pipes having air blowing holes that blow into the small enclosed area of ​​the garment.

10. A T-shirt cuff trimming device with a cutting blade according to claim 2, characterized in that, The left wheel unit (200) includes a linear module (202) fixed on the frame with a stroke in the left-right direction. The sliding part of the linear module (202) is fixed to the left wheel seat (203). The left wheel motor (204) is fixed on the left wheel seat (203). The left wheel seat (203) extends to the right to form a cantilever (205). The free end of the cantilever (205) is connected to the left wheel (201). The left wheel (201) is connected to the motor shaft of the left wheel motor (204) by a synchronous belt. The cantilever (205) gradually tapers from left to right, and the left wheel (201) is in the shape of a round rod.

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