Additional thread trimming structure of computer pattern sewing machine

Abstract

The utility model discloses an additional thread trimming structure of a computerized pattern sewing machine, which comprises a rack, a shuttle race shaft is arranged on the rack, a sewing seat is arranged at the front end of the rack, and the shuttle race shaft penetrates into the sewing seat; a blade mounting seat is mounted at the front end of the shuttle race shaft, a movable tool apron of a movable blade is mounted on the blade mounting seat, and the movable blade extends forwards on the movable tool apron; a fixed blade is mounted on the inner side of the front end of the sewing seat and is opposite to the movable blade; the movable tool apron is connected with a movable connecting rod which is connected with a driving shaft; the driving shaft is connected with a motor which is installed in the machine frame. In this way, some obstacle positions on the rack can be staggered to install the thread trimming structure, original vacant positions and hole positions on the rack are fully utilized, large-scale transformation of the rack is not needed, the thread trimming structure is additionally installed on the rack of original equipment, and the additionally-installed thread trimming structure is simple, practical, reliable, convenient, flexible to install and lower in noise.

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 machines are commonly used in textile machinery, widely used for sewing clothing, luggage, handbags, shoes, gloves, and other products. They enable fast, efficient, and precise sewing. Traditionally, the thread trimming mechanism for computerized pattern machines is typically located within the machine body and requires a dedicated mounting location. For example, Chinese utility model patent CN207176250U discloses a dual-thread trimming mechanism for a computerized flat sewing machine. The mechanism is designed as an integral part of the machine body, meaning that mounting space for the mechanism is reserved during the machine's design. However, some computerized pattern machines lack a designated mounting location for the trimming mechanism, or the designated location doesn't meet user needs, making it difficult to install the trimming mechanism separately and causing inconvenience. Furthermore, current computerized pattern machines typically use a gear transmission to transmit motor power to drive the blades for thread trimming. However, this gear transmission is not only costly and requires more stringent mounting locations, but also produces high noise levels due to the rigid contact between the gears during operation. Utility Model Content

[0003] The utility model aims to solve the defects of the prior art and provides a computer pattern machine add-on thread trimming structure with a simple structure, which can utilize the existing structure of the equipment to install an additional thread trimming mechanism, is convenient and practical, has flexible installation, and has lower noise.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a computer pattern machine with an attached thread trimming structure, comprising a frame, a shuttle bed shaft on the frame, a sewing seat at the front end of the frame, and the shuttle bed shaft passing through the sewing seat, characterized in that: a blade mounting seat is installed at the front end of the shuttle bed shaft, a movable knife seat with a movable blade is installed on the blade mounting seat, and the movable blade extends forward on the movable knife seat; a fixed blade is installed on the inner side of the front end of the sewing seat, and the fixed blade is opposite to the movable blade; the movable knife seat is connected to a movable connecting rod, and the movable connecting rod is connected to a drive shaft, and the drive shaft and the shuttle bed shaft are staggered; the drive shaft is connected to a motor, and the motor is installed in the frame.

[0005] Furthermore, the motor is installed at the bottom of the frame, and the drive shaft is inserted into the sewing seat above the motor and connected to the movable connecting rod; the output shaft of the motor is connected to the driving wheel, and the driven wheel is fixed on the drive shaft, and the driven wheel is connected to the driving wheel through a belt.

[0006] Furthermore, the motor is mounted on the bottom of the frame via a motor mounting plate.

[0007] Furthermore, the movable blade extends forward from one side of the movable blade seat, and a connecting arm extends outward from the other side of the movable blade seat, and the movable connecting rod is hinged and fixed to the connecting arm through an axle pin.

[0008] Furthermore, the movable connecting rod is a two-connecting rod structure, and the two connecting rods are hinged by an axle pin to form a relatively rotatable structure.

[0009] Furthermore, the fixed blade is mounted on the front inner wall of the sewing seat via a fixed blade seat.

[0010] Furthermore, the position of the driving shaft is lower than that of the shuttle bed shaft. The driving shaft penetrates into the sewing seat in a posture parallel to the shuttle bed shaft, and passes out from the side of the blade mounting seat to be connected and fixed with the movable connecting rod.

[0011] This new invention utilizes the existing sewing seat and shuttle shaft of the frame to mount the blade module. The movable blade is connected to the motor via a movable connecting rod, drive shaft, and pulley transmission mechanism. This allows for the elimination of obstructions on the frame, fully utilizing the existing spaces and holes. Even if holes are insufficient, drilling is sufficient at the desired locations, eliminating the need for extensive frame modifications. This allows the addition of a thread trimmer to the existing frame. The added thread trimmer is simple, practical, reliable, convenient, flexible to install, and produces minimal noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic structural diagram of the utility model from another angle;

[0014] Figure 3 This is a schematic structural diagram of the utility model from a third angle;

[0015] Figure 4 This is a schematic diagram of the structure of the utility model after the frame is hidden;

[0016] Figure 5 This is a structural diagram of the utility model from another angle after the frame is hidden.

[0017] In the figure, 1 is a frame, 11 is a sewing seat, 12 is a shuttle bed shaft, 2 is a motor, 21 is a driving wheel, 22 is a driven wheel, 23 is a belt, 3 is a driving shaft, 4 is a motor mounting plate, 5 is a movable blade, 51 is a movable knife seat, 52 is a connecting arm, 6 is a fixed blade, 61 is a fixed knife seat, 7 is a blade mounting seat, and 8 is a movable connecting rod. DETAILED DESCRIPTION

[0018] In this embodiment, refer to Figure 1-Figure 5The computerized pattern machine's retrofitted thread trimming structure comprises a frame 1, on which a shuttle shaft 12 is mounted. A sewing seat 11 is provided at the front end of the frame 1. The shuttle shaft 12 is inserted into the sewing seat 11 for sewing. A blade mounting seat 7 is mounted at the front end of the shuttle shaft 12. A movable blade seat 51 for a movable blade 5 is mounted on the blade mounting seat 7. The movable blade 5 extends forward from the movable blade seat 51. A fixed blade 6 is mounted on the inner side of the front end of the sewing seat 11. The fixed blade 6 faces the movable blade 5. The movable blade seat 51 is connected to a movable connecting rod 8, which is connected to a drive shaft 3. The drive shaft 3 is staggered with the shuttle shaft 12 to avoid interference. The drive shaft 3 is connected to a motor 2, which is mounted in the original empty space of the frame 1.

[0019] Motor 2 is installed in the empty space at the bottom of frame 1. Drive shaft 3 passes through the sewing seat 11 above motor 2 and is connected to movable connecting rod 8. The output shaft of motor 2 is connected to driving pulley 21. Drive shaft 3 is fixed to driven pulley 22, which is connected to driving pulley 21 by belt 23. This belt drive system has two advantages: first, it is quieter than gear drive; second, the belt length can be designed according to the needs, while gear drive is difficult to achieve long-distance transmission. Therefore, using belt drive can make the selection of motor installation location more flexible and less restricted by the structure of the frame itself.

[0020] The motor 2 is mounted on the bottom of the frame 1 through a motor mounting plate 3. During installation, it is only necessary to drill several screw holes at the mounting position and fix the motor mounting plate 3.

[0021] The movable blade 5 extends forward from one side of the movable blade seat 51 , and a connecting arm 52 extends outward from the other side of the movable blade seat 51 . The movable connecting rod 8 is hingedly fixed to the connecting arm 52 via an axle pin.

[0022] The movable link 8 is a two-link structure, and the two links are hinged by an axle pin to form a relatively rotatable structure.

[0023] The fixed blade 6 is mounted on the front inner wall of the sewing seat 11 via a fixed blade seat 61 .

[0024] The position of the driving shaft 3 is lower than that of the shuttle bed shaft 12 . The driving shaft 3 penetrates into the sewing seat 11 in a posture parallel to the shuttle bed shaft 12 , and passes out from the side of the blade mounting seat 7 to be connected and fixed with the movable connecting rod 8 .

[0025] After sewing is complete, the electronic control transmits a signal to motor 2, which drives driving pulley 21, which in turn drives driven pulley 22 and drive shaft 3 via belt 23. Drive shaft 3 then rotates movable link 8, which in turn rotates movable blade holder 51 via connecting arm 52, causing movable blade 5 to rotate accordingly. After rotating to a set angle (e.g., 120 degrees), movable blade 5 engages fixed blade 6 to cut the thread, and motor 2 then immediately reverses to return to its starting angle.

[0026] 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 with a retrofitted thread trimming structure, comprising a frame, a shuttle shaft on the frame, a sewing seat at the front end of the frame, the shuttle shaft passing through the sewing seat, and characterized by: A blade mounting seat is installed at the front end of the shuttle bed shaft, and a movable blade is installed on the blade mounting seat. The movable blade extends forward on the movable blade seat; a fixed blade is installed on the inner side of the front end of the sewing seat, and the fixed blade is opposite to the movable blade; the movable blade seat is connected to a movable connecting rod, and the movable connecting rod is connected to a drive shaft, and the drive shaft is staggered with the shuttle bed shaft; the drive shaft is connected to a motor, and the motor is installed in the frame.

2. The computer pattern machine retrofitting thread trimming structure according to claim 1, characterized in that: The motor is installed at the bottom of the frame, and the drive shaft is inserted into the sewing seat above the motor and connected to the movable connecting rod; the output shaft of the motor is connected to the driving wheel, and the driven wheel is fixed on the drive shaft, and the driven wheel is connected to the driving wheel through a belt.

3. The computer pattern machine retrofitted thread trimming structure according to claim 1 or 2, characterized in that: The motor is mounted on the bottom of the frame through a motor mounting plate.

4. The computer pattern machine retrofitting thread trimming structure according to claim 1, characterized in that: The movable blade extends forward from one side of the movable blade seat, and a connecting arm extends outward from the other side of the movable blade seat. The movable connecting rod is hinged and fixed to the connecting arm through an axle pin.

5. The computer pattern machine retrofitted thread trimming structure according to claim 4, characterized in that: The movable connecting rod is a two-connecting rod structure, and the two connecting rods are hinged by an axle pin to form a relatively rotatable structure.

6. The computer pattern machine retrofitted thread trimming structure according to claim 1, characterized in that: The fixed blade is mounted on the front inner wall of the sewing seat through a fixed blade seat.

7. The computer pattern machine retrofitting thread trimming structure according to claim 1, characterized in that: The position of the driving shaft is lower than that of the shuttle bed shaft. The driving shaft penetrates into the sewing seat in a posture parallel to the shuttle bed shaft, and passes out from the side of the blade mounting seat to be connected and fixed with the movable connecting rod.

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