Cylinder type thread trimming structure of computer pattern sewing machine

Abstract

The utility model discloses a barrel type thread trimming structure of a computerized pattern sewing machine, which comprises a machine shell, a driving device and a blade, and a sleeve is arranged at the front end of the machine shell and extends forwards; a mounting cylinder is arranged in the sleeve, and a shuttle race shaft of the main machine penetrates from the tail end of the mounting cylinder to the front end of the mounting cylinder; the blades comprise a fixed blade and a movable blade, the fixed blade is mounted at the front end of the sleeve, and the movable blade is mounted on the shuttle race shaft; the head end of the movable blade is provided with a movable cutting edge, and the head end of the fixed blade is provided with a fixed cutting edge. The movable blade is rotated to be meshed with the fixed blade in a staggered mode to achieve thread trimming, so that products such as gloves and handbags which are small in size and are of cylindrical structures can be conveniently arranged on the sleeve in a sleeved mode to be sewn, trimmed and the like, meanwhile, other conventional products can be machined, and the universality of equipment is improved. Meanwhile, the equipment is simpler in structure and convenient to debug, the thread end length can be more accurately controlled, the problems that thread feeding cannot be carried out during sewing and the thread is broken are solved, and the noise of thread trimming is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of computer pattern machines, in particular to a thread trimming structure applied to computer pattern machines. Background Art

[0002] Computerized pattern sewing machines are commonly used in textile machinery, widely used for sewing products such as luggage, handbags, shoes, and gloves in relatively confined spaces. They enable fast, efficient, and precise sewing. Traditional computerized pattern sewing machines typically have their thread trimming mechanisms located internally within the machine body. For example, Chinese Utility Model Patent CN207176250U discloses a dual-thread trimming mechanism for a computerized flat sewing machine, where the thread trimming mechanism is recessed relative to the machine body. This structure presents no challenges for processing flat products, but it can present challenges for smaller, cylindrical products such as gloves and handbags. For example, the front nozzle width of a typical computerized pattern sewing machine is typically 135 mm, making it impossible to sew and trim cylindrical products smaller than 135 mm. Furthermore, the relative rotation of the two rotating blades for thread trimming increases the complexity, cost, reliability, and susceptibility to failure. Furthermore, most existing computerized pattern machines of this type use a pneumatic cylinder to pull a connecting rod to perform the thread trimming action, making it difficult to precisely control the thread length at each trimming step, which can easily lead to thread failure or breakage. Furthermore, these trimming methods are noisy, and the product structure and debugging process are complex, requiring significant time for commissioning. Utility Model Content

[0003] The utility model aims to solve the defects of the prior art and provide a computer pattern machine cylinder-type thread trimming structure with simpler structure, lower cost, higher reliability and adaptability to products of more different sizes.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a computer pattern machine cylinder-type thread cutting structure, comprising a housing, a driving device and a blade, the driving device being mounted on the housing and connected to the shuttle shaft of the main machine, characterized in that: a sleeve is provided at the front end of the housing, the sleeve extending forward to protrude from the front of the housing; a mounting cylinder is mounted in the sleeve, and the shuttle shaft passes through from the rear end to the front end of the mounting cylinder; the blade comprises a fixed blade and a movable blade, the fixed blade being mounted at the front end of the sleeve, and the movable blade being mounted on the shuttle shaft to form a structure opposite to the fixed blade; the movable blade has a movable blade at its head end, and the fixed blade has a fixed blade at its head end, and the movable blade is rotated until its movable blade interlocks and engages with the fixed blade of the fixed blade to form a structure for cutting the suture.

[0005] Furthermore, the upper wall of the sleeve is set to an open structure, so that the entire sleeve forms a groove structure; the fixed blade is installed on the front end outer wall of the sleeve, and the fixed blade of the fixed blade bends and extends upward and extends into the interior of the sleeve from the opening structure; the movable blade is installed against the front end inner wall of the sleeve but does not contact the sleeve, and the movable blade is located on the inside and the fixed blade is located on the outside.

[0006] Preferably, the outer diameter of the sleeve is 3-8 cm, such as 5 cm; the sleeve and the housing are integrally cast to form an integral structure.

[0007] Furthermore, the tail of the movable blade is connected to a movable knife seat, which is assembled and fixed to the shuttle shaft in front of the front end of the mounting tube, and the movable blade extends forward from the side of the movable knife seat and is close to the front end inner wall of the sleeve.

[0008] Furthermore, a blade seat with a thickness less than that of the sleeve wall is provided at the front end of the sleeve. The fixed blade is fixed to the blade seat by an adjustable screw and extends beyond the head end of the blade seat into the opening structure of the sleeve to facilitate docking with the movable blade in the sleeve.

[0009] Furthermore, the driving device adopts a motor, the output shaft of the motor is connected to the driving wheel, the shuttle bed shaft is equipped with a driven wheel, and the driven wheel is connected to the driving wheel.

[0010] Preferably, the driving wheel and the driven wheel are both gears, which are meshed with each other.

[0011] Furthermore, a fixing seat is provided at the front section of the sleeve, the front end of the mounting tube is mounted in the fixing seat and passes through the fixing seat, and the fixed blade and the movable blade are located in front of the fixing seat.

[0012] Furthermore, a fixing plate is connected to the rear end of the sleeve, the fixing plate and the sleeve form a T-shaped structure, and the fixing plate is fixed to the front end surface of the casing.

[0013] Preferably, a line dividing piece is installed on the inner wall of the front end of the sleeve, and the line dividing piece is close to the inner side of the fixed blade, which is used to guide the suture and prevent the suture from being entangled in the shuttle bed.

[0014] The utility model provides an outwardly protruding sleeve at the front end of the housing, and installs a fixed blade and a movable blade at the front end of the sleeve. The movable blade is connected to a motor for driving, and the movable blade is rotated to interlock with the fixed blade to cut the thread. Therefore, some small and cylindrical products such as gloves and handbags can be easily put on the sleeve for sewing and thread cutting. At the same time, other conventional products can also be processed, thereby improving the universality of the equipment. At the same time, the equipment structure is simpler, debugging is more convenient, and the length of the thread end can be controlled more accurately, solving the problems of thread failure and thread breakage during sewing, and the thread cutting noise is also reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the utility model from another angle;

[0017] Figure 3 for Figure 1 An enlarged view of part A is shown;

[0018] Figure 4 for Figure 2 An enlarged view of part B is shown;

[0019] Figure 5 This is a schematic diagram of the structure after the casing is removed.

[0020] In the figure, 1 is the casing, 2 is the sleeve, 21 is the fixed plate, 22 is the fixed seat, 23 is the blade seat, 3 is the motor, 31 is the driving wheel, 32 is the driven wheel, 4 is the mounting cylinder, 5 is the fixed blade, 51 is the fixed blade, 6 is the movable blade, 61 is the movable blade, 62 is the movable blade seat, 7 is the shuttle bed shaft, and 8 is the dividing piece. DETAILED DESCRIPTION

[0021] In this embodiment, refer to Figure 1-Figure 5 The computer pattern machine cylinder-type thread trimming structure includes a housing 1 (belonging to the housing of the main machine), a driving device and a blade, the driving device being mounted on the housing 1 and connected to the shuttle shaft 7 of the main machine; a sleeve 22 is provided at the front end of the housing 1, which extends forward to protrude from the front of the housing 1, so that a relief position can be formed, so that some small, cylindrical objects can be conveniently sewn and trimmed; a mounting cylinder 4 is mounted in the sleeve 2, and the shuttle shaft 7 passes through the mounting cylinder 4 from the rear end to the front end without contacting each other; the blade includes a fixed blade 5 and a movable blade 6, the fixed blade 5 is mounted at the front end of the sleeve 2, and the movable blade 6 is mounted on the shuttle shaft 7 to form a structure opposite to the fixed blade 5; the head end of the movable blade 6 has a movable blade 61, and the head end of the fixed blade 5 has a fixed blade 51. The movable blade 6 rotates until its movable blade 61 interlocks and engages with the fixed blade 51 of the fixed blade 5 to cut the suture.

[0022] The upper wall of the sleeve 2 is set to an open structure, so that the entire sleeve 2 forms a groove structure; the fixed blade 5 is installed on the front end outer wall of the sleeve 2, and the fixed blade 51 of the fixed blade 5 is bent and extended upward and extends into the interior of the sleeve 2 from the opening structure so as to be able to dock with the movable blade 6; the movable blade 6 is installed against the front end inner wall of the sleeve 2 but does not contact the sleeve 2, and the movable blade 6 is located on the inside and the fixed blade 5 is located on the outside.

[0023] The tail of the movable blade 6 is connected to a movable blade holder 62 , which is assembled and fixed to the shuttle shaft 7 in front of the front end of the mounting tube 4 . The movable blade 6 extends forward from the side of the movable blade holder 62 and is close to the front end inner wall of the sleeve 2 .

[0024] A blade seat 23 having a thickness less than that of the sleeve 2 wall is provided at the front end of the sleeve 2. The fixed blade 5 is fixed to the blade seat 23 by an adjustable screw and extends beyond the head end of the blade seat 23 into the opening structure of the sleeve 2 to facilitate docking with the movable blade 6 in the sleeve 2. After loosening the adjustable screw, the position of the fixed blade 5 can be fine-tuned to achieve higher precision in thread cutting.

[0025] The driving device adopts a motor 3 , the output shaft of the motor 3 is connected to a driving wheel 31 , a driven wheel 32 is installed on the shuttle shaft 7 , and the driven wheel 32 is connected to the driving wheel 31 .

[0026] The driving wheel 31 and the driven wheel 32 are both gears, and the two are meshed with each other.

[0027] A fixed seat 22 is provided at the front position of the sleeve 2. The front end of the mounting tube 4 is mounted in the fixed seat 22 and passes through the fixed seat 22 to improve the stability of the mounting structure of the movable blade 6. The fixed blade 5 and the movable blade 6 are located in front of the fixed seat 22.

[0028] The rear end of the sleeve 2 is connected to a fixing plate 21 . The fixing plate 21 and the sleeve 2 form a T-shaped structure. The fixing plate 21 is fixed to the front end surface of the housing 1 .

[0029] A line splitting piece 8 is installed on the front end inner wall of sleeve 2, and line splitting piece 8 is near the inboard of fixed blade 5, is used for guiding suture, prevents suture from being rolled into shuttle bed. Certainly, line splitting piece 8 itself is set and belongs to prior art.

[0030] The outer diameter of the sleeve 2 is 3-8 cm, for example 5 cm, which can be inserted into most products for sewing operations; the sleeve and the housing are integrally cast to form an integral structure.

[0031] After sewing is completed, the electric control transmits a signal to the motor 3, which drives the shuttle shaft 7, causing the movable blade 6 to rotate accordingly. After the movable blade 6 rotates 120 degrees, the fixed blade 5 bites and cuts the thread, and then the motor 3 immediately reverses to restore to the starting angle.

[0032] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. All equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A computerized pattern machine cylinder-type thread trimming structure, comprising a housing, a drive device, and a blade, wherein the drive device is mounted on the housing and connected to the shuttle shaft of the main machine, characterized in that: A sleeve is provided at the front end of the housing, and the sleeve extends forward to protrude from the front of the housing; a mounting cylinder is installed in the sleeve, and the shuttle shaft passes through the rear end of the mounting cylinder to the front end; the blade includes a fixed blade and a movable blade, the fixed blade is installed at the front end of the sleeve, and the movable blade is installed on the shuttle shaft to form a structure opposite to the fixed blade; The movable blade has a movable blade at its head end, and the fixed blade has a fixed blade at its head end. The movable blade rotates until its movable blade and the fixed blade of the fixed blade interlock and bite to form a suture cutting structure.

2. The cylinder-type thread trimming structure of the computer pattern machine according to claim 1, characterized in that: The upper wall of the sleeve is configured as an opening structure, so that the entire sleeve forms a groove-shaped structure; the fixed blade is mounted on the front outer wall of the sleeve, and the fixed blade of the fixed blade bends and extends upward and extends into the interior of the sleeve from the opening structure; The movable blade is installed close to the front inner wall of the sleeve but does not contact the sleeve, and the movable blade is located on the inner side and the fixed blade is located on the outer side.

3. The cylinder-type thread trimming structure of a computerized pattern machine according to claim 1 or 2, characterized in that: The tail of the movable blade is connected with a movable knife seat, which is fixed to the shuttle shaft in front of the front end of the mounting tube. The movable blade extends forward from the side of the movable knife seat and is close to the front end inner wall of the sleeve.

4. The cylinder-type thread trimming structure of a computerized pattern machine according to claim 2, characterized in that: A blade seat with a thickness less than that of the sleeve wall is provided at the front end of the sleeve. The fixed blade is fixed to the blade seat by an adjustable screw and extends beyond the head end of the blade seat into the opening structure of the sleeve.

5. The cylinder-type thread trimming structure of a computer pattern machine according to claim 1, characterized in that: The driving device adopts a motor, the output shaft of the motor is connected with a driving wheel, the shuttle bed shaft is equipped with a driven wheel, and the driven wheel is connected to the driving wheel.

6. The cylinder-type thread trimming structure of the computerized pattern machine according to claim 5, characterized in that: The driving wheel and the driven wheel both adopt gears, and the two mesh with each other.

7. The cylinder-type thread trimming structure of a computer pattern machine according to claim 2, characterized in that: A fixing seat is arranged at the front section of the sleeve. The front end of the mounting tube is mounted in the fixing seat and passes through the fixing seat. The fixed blade and the movable blade are located in front of the fixing seat.

8. The cylinder-type thread trimming structure of a computerized pattern machine according to claim 1, characterized in that: The tail end of the sleeve is connected to a fixing plate, the fixing plate and the sleeve form a T-shaped structure, and the fixing plate is fixed to the front end surface of the casing.

9. The cylinder-type thread trimming structure of a computerized pattern machine according to claim 2, characterized in that: A line dividing piece is installed on the inner wall of the front end of the sleeve, and the line dividing piece is close to the inner side of the fixed blade.

10. The cylinder-type thread trimming structure of a computer pattern machine according to claim 1, characterized in that: The outer diameter of the sleeve is 3-8 cm; the sleeve and the casing are integrally cast to form an integrated structure.

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