A fully automatic double needle sewing machine

Abstract

The utility model provides a full -automatic double needle sewing machine, including the shell, install drive assembly and adjusting assembly in, drive assembly is installed with main needle pole and vice needle pole, is provided with first shuttle bed and second shuttle bed in third installation cavity, wherein first shuttle bed fixed mounting and with main needle pole correspondingly is established, first guide rail is installed in the bottom end in third installation cavity, second shuttle bed is slidably installed on the surface of first guide rail, drive assembly is used for synchronous drive main needle pole and vice needle pole reciprocating motion and first shuttle bed and second shuttle bed work, adjusting assembly is used for synchronous adjusting the position of vice needle pole and second shuttle bed, through the adjusting assembly of setting makes second servo motor drive first push -and -go mechanism and second push -and -go mechanism synchronous movement, and the position of main needle pole and first shuttle bed is fixed, therefore through this kind of mode can be convenient for quick adjustment the distance between main needle pole and vice needle pole, and the distance between second shuttle bed and first shuttle bed is synchronous adjustment in this process.

Description

Technical Field

[0001] This utility model belongs to the technical field of trouser loop sewing machines, specifically relating to a fully automatic double-needle sewing machine. Background Technology

[0002] Double-needle sewing machines are typically used to sew the two ends of trouser loops simultaneously. Traditional double-needle sewing machines usually use mechanical adjustment of the distance between the two needle bars (i.e., the sewing width) to achieve different stitch requirements. A common adjustment method is to manually loosen the locking screw, move one needle bar, and then tighten it again. This method has several drawbacks:

[0003] 1. The adjustment process is cumbersome and time-consuming, which cannot meet the needs of frequent changes in sewing styles in modern production;

[0004] 2. Reliance on operator experience and feel can easily lead to errors and affect product consistency.

[0005] 3. It cannot be integrated with the central control system and cannot be remotely or programmed for control on the production line.

[0006] Therefore, there is an urgent need for a sewing machine that can adjust the width of the double needles with high precision, high efficiency and automation. Utility Model Content

[0007] The purpose of this invention is to provide a fully automatic double-needle sewing machine, which aims to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a fully automatic double-needle sewing machine, comprising a housing, wherein the housing is divided into a first mounting cavity, a second mounting cavity, a third mounting cavity, and a fourth mounting cavity, wherein the second mounting cavity is located at the top of the third mounting cavity, and a drive assembly and an adjustment assembly are installed in the second and third mounting cavities. A main needle bar and a secondary needle bar are mounted on the drive assembly. A first shuttle bed and a second shuttle bed are disposed in the third mounting cavity, wherein the first shuttle bed is fixedly installed and corresponding to the main needle bar. A first guide rail is installed at the bottom of the third mounting cavity. The second shuttle bed is slidably mounted on the surface of the first guide rail. The drive assembly is used to synchronously drive the main needle bar and the auxiliary needle bar to reciprocate and work the first shuttle bed and the second shuttle bed. The adjustment assembly is used to synchronously adjust the position of the auxiliary needle bar and the second shuttle bed. The bottom of the second mounting cavity is provided with a first through hole and a first strip hole. The main needle bar extends to the bottom through the through hole, and the auxiliary needle bar extends to the bottom through the first strip hole. The top of the third mounting cavity is provided with a second through hole and a second strip hole. The rotary hook of the first shuttle bed is set at the second through hole, and the rotary hook of the second shuttle bed is set at the second strip hole.

[0009] As a preferred embodiment of this utility model, the drive assembly includes two cranks rotatably mounted on both sides of the second mounting cavity via bearings. A first connecting rod is fixedly connected between the two cranks. Connecting parts are rotatably mounted at both ends of the first connecting rod. A second connecting rod is fixedly connected between the two connecting parts. A mounting hole is provided in the middle of the main needle rod, and a second fixing rod is inserted into the mounting hole. The main needle rod is located at one end of the second connecting rod. A limiting block is also installed on the inner wall of the second mounting cavity. A first guide hole is provided on the surface of the limiting block. The top of the main needle rod is inserted into the first guide hole. The top and bottom sides of the first mounting cavity are also respectively... A first rotating rod and a second rotating rod are rotatably mounted via bearings. One end of the first rotating rod extends into the second mounting cavity and is fixedly connected to one of the cranks. A first synchronous pulley and a second synchronous pulley are respectively mounted on the surfaces of the first rotating rod and the second synchronous pulley. A first synchronous belt is installed between the first synchronous pulley and the second synchronous pulley. A first servo motor is fixedly mounted on one side of the top of the housing. The output shaft of the first servo motor extends into the first mounting cavity and is fixedly connected to one end of the first connecting rod. A drive rod for driving the first shuttle bed and the second shuttle bed to work simultaneously is connected between them. One end of the drive rod is fixedly connected to one end of the second rotating rod.

[0010] As a preferred technical solution of this utility model, the adjustment assembly includes two first and second pushing mechanisms respectively rotatably mounted on the top and bottom of the first mounting cavity via bearings. A second guide rail is installed in the second mounting cavity, and a laterally movable slide plate is slidably mounted on the surface of the second guide rail. A mounting base is fixedly mounted on the front of the slide plate. The mounting base is U-shaped, and a second guide hole and a insertion hole are respectively opened on the top and bottom of the mounting base. The auxiliary needle rod is vertically inserted into the insertion hole and its top is inserted into the second guide hole. An opening is opened in the middle of the auxiliary needle rod, and a second connecting rod is inserted into the opening. A first connecting block is fixedly connected to one side of the mounting base, and a second connecting block is fixedly connected to the side of the second shuttle bed. The first pushing mechanism is connected to the first connecting block, and the second pushing mechanism is connected to the second connecting block. A second synchronous belt is installed between the first and second pushing mechanisms. A second servo motor is fixedly mounted on one side of the bottom of the housing, and the output shaft of the second servo motor is connected to the second pushing mechanism.

[0011] As a preferred technical solution of this utility model, the first and second pushing mechanisms have the same structure, both consisting of a sleeve, a screw, and a third synchronous pulley. The inner wall of the sleeve is provided with an internal thread, and the screw is threadedly connected to the sleeve through the internal thread. A platform is provided on one side of the screw, and a first screw hole is provided on the surface of each platform. A second screw hole is provided on the surface of both the first and second connecting blocks. The two ends of the sleeve in the first and second pushing mechanisms are respectively rotatably mounted on the top and bottom of the first mounting cavity through bearings. The second synchronous belt is connected to the third synchronous pulley in the first and second pushing mechanisms. The screw in the first pushing mechanism is connected to the first connecting block through a screw engaging the first and second screw holes. The screw in the second pushing mechanism is threadedly connected to the second connecting block through a screw engaging the first and second screw holes. The output shaft of the second servo motor is connected to the sleeve in the second pushing mechanism.

[0012] As a preferred technical solution of this utility model, the first synchronous pulley, the second synchronous pulley and the third synchronous pulley are all disposed in the fourth mounting cavity.

[0013] As a preferred technical solution of this utility model, the auxiliary needle bar is positioned correspondingly to the second shuttle bed.

[0014] In a preferred embodiment of this invention, both the first servo motor and the second servo motor are electrically connected to an external controller, which is a PLC controller.

[0015] As a preferred technical solution of this utility model, the first servo motor and the second servo motor have built-in encoders.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: the adjustment component enables the second servo motor to drive the first and second pushing mechanisms to move synchronously, while the positions of the main needle bar and the first shuttle bed are fixed. Therefore, this method facilitates the rapid adjustment of the distance between the main needle bar and the auxiliary needle bar. Moreover, during this process, the distance between the second shuttle bed and the first shuttle bed is adjusted synchronously, thus facilitating the rapid adjustment of the distance between the main needle bar and the auxiliary needle bar. This makes it easier to adapt to the sewing of trouser loops of different widths. The synchronous adjustment method ensures the accuracy of the adjustment and the consistency of the product sewing. At the same time, the first and second servo motors are controlled by a controller, which facilitates the programmed control of the trouser loop machine on the production line. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the drive component and the adjustment component in this utility model;

[0021] Figure 4 This is a schematic diagram of the drive component structure in this utility model;

[0022] Figure 5 This is a schematic diagram of the adjustment component in this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the first pushing mechanism in this utility model;

[0024] Figure 7 This is a partial structural diagram of the adjustment component in this utility model.

[0025] In the diagram: 1. Outer shell; 2. First mounting cavity; 3. Second mounting cavity; 4. Third mounting cavity; 5. Fourth mounting cavity; 6. Drive assembly; 61. Crank; 62. First connecting rod; 63. Connector; 64. Second connecting rod; 65. Limiting block; 66. First rotating rod; 67. Second rotating rod; 68. First synchronous pulley; 69. Second synchronous pulley; 610. First synchronous belt; 611. First servo motor; 612. Drive rod; 7. Adjustment assembly; 1. First pushing mechanism; 72. Second pushing mechanism; 73. Second guide rail; 74. Slide plate; 75. Mounting base; 76. Opening; 77. First connecting block; 78. Second synchronous belt; 79. Second servo motor; 710. Sleeve; 711. Screw; 712. Third synchronous pulley; 713. Platform; 8. First shuttle; 9. Second shuttle; 10. First guide rail; 11. Second strip hole; 12. Second connecting block; 13. Main needle rod; 14. Auxiliary needle rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-7This utility model provides the following technical solution: A fully automatic double-needle sewing machine, including a housing 1, which is divided into a first mounting cavity 2, a second mounting cavity 3, a third mounting cavity 4, and a fourth mounting cavity 5. The second mounting cavity 3 is located at the top of the third mounting cavity 4. A drive assembly 6 and an adjustment assembly 7 are installed in the second mounting cavity 3 and the third mounting cavity 4. A main needle bar 13 and an auxiliary needle bar 14 are installed on the drive assembly 6. A first shuttle bed 8 and a second shuttle bed 9 are arranged in the third mounting cavity 4. The first shuttle bed 8 is fixedly installed and corresponds to the main needle bar 13. A first guide rail 10 is installed at the bottom of the third mounting cavity 4. The second shuttle bed 9 is slidably installed on the surface of the first guide rail 10. The drive assembly 6 is used to synchronously drive the main needle bar 13 and the auxiliary needle bar 14 to reciprocate and the first shuttle bed 8 to reciprocate. When the shuttle bed 9 is in operation, the adjusting component 7 is used to synchronously adjust the position of the auxiliary needle rod 14 and the second shuttle bed 9. The bottom of the second mounting cavity 3 is provided with a first through hole and a first strip hole. The main needle rod 13 extends to the bottom through the through hole, and the auxiliary needle rod 14 extends to the bottom through the first strip hole. The top of the third mounting cavity 4 is provided with a second through hole and a second strip hole 11. The rotary hook of the first shuttle bed 8 is located at the second through hole, and the rotary hook of the second shuttle bed 9 is located at the second strip hole 11. When the adjusting component 7 drives the synchronous adjustment of the position of the auxiliary needle rod 14 and the second shuttle bed 9, the auxiliary needle rod 14 adjusts its position in the first strip hole, while the rotary hook of the second shuttle bed 9 adjusts its position in the second strip hole 11. In this way, the auxiliary needle rod 14 can cooperate with the rotary hook of the second shuttle bed 9 to perform hook sewing.

[0028] In this embodiment, the drive assembly 6 includes two cranks 61 rotatably mounted on both sides of the second mounting cavity 3 via bearings. A first connecting rod 62 is fixedly connected between the two cranks 61. Connecting parts 63 are rotatably mounted at both ends of the first connecting rod 62. A second connecting rod 64 is fixedly connected between the two connecting parts 63. A mounting hole is opened in the middle of the main needle rod 13, and a second fixing rod is inserted into the mounting hole. The main needle rod 13 is located at one end of the second connecting rod 64. A limiting block 65 is also installed on the inner wall of the second mounting cavity 3. A first guide hole is opened on the surface of the limiting block 65. The top of the main needle rod 13 is inserted into the first guide hole. A first rotating rod is rotatably mounted on both sides of the top and bottom of the first mounting cavity 2 via bearings. The first rotating rod 66 has one end extending into the second mounting cavity 3 and fixedly connected to one of the cranks 61. The surfaces of the first rotating rod 66 and the second rotating rod 67 are respectively equipped with a first synchronous pulley 68 and a second synchronous pulley 69. A first synchronous belt 610 is installed between the first synchronous pulley 68 and the second synchronous pulley 69. A first servo motor 611 is fixedly installed on one side of the top of the housing 1. The output shaft of the first servo motor 611 extends into the first mounting cavity 2 and is fixedly connected to one end of the first connecting rod 62. A drive rod 612 for driving the first shuttle bed 8 and the second shuttle bed 9 to work simultaneously is connected between them. One end of the drive rod 612 is fixedly connected to one end of the second rotating rod 67.

[0029] Specifically, the first servo motor 611 drives the first rotating rod 66 to rotate. Under the action of the first synchronous pulley 68 and the second synchronous pulley 69 in conjunction with the first synchronous belt 610, the first rotating rod 66 and the second rotating rod 67 rotate synchronously. When the first rotating rod 66 rotates, it drives the crank 61 to rotate. The crank-connecting rod structure composed of the crank 61, the connecting piece 63, the first connecting rod 62 and the second connecting rod 64 enables the main needle rod 13 and the auxiliary needle rod 14 to perform reciprocating lifting and lowering hooking work synchronously. The setting limit block 65, in conjunction with the first guide hole opened at the top of the limit block 65, can guide the main needle rod 13, thereby improving the stability of the main needle rod 13 in reciprocating lifting and lowering. When the second rotating rod 67 rotates, it drives the drive rod 612 to rotate. The rotation of the drive rod 612 drives the first shuttle bed 8 and the second shuttle bed 9 to work simultaneously. Therefore, the main needle rod 13 and the first shuttle bed 8, together with the auxiliary needle rod 14 and the second shuttle bed 9, can sew the two ends of the trouser loop synchronously.

[0030] In this embodiment, the adjustment assembly 7 includes two first pushing mechanisms 71 and second pushing mechanisms 72, which are respectively rotatably mounted on the top and bottom of the first mounting cavity 2 via bearings. A second guide rail 73 is installed in the second mounting cavity 3. A laterally movable sliding plate 74 is slidably mounted on the surface of the second guide rail 73. A mounting base 75 is fixedly mounted on the front of the sliding plate 74. The mounting base 75 is U-shaped, and a second guide hole and a insertion hole are respectively opened on the top and bottom of the mounting base 75. The auxiliary needle rod 14 is vertically inserted into the insertion hole and its top is inserted into the second guide hole. An opening 76 is opened in the middle of the auxiliary needle rod 14. The second connecting rod 64 is inserted and connected to the opening 76. The first connecting block 77 is fixedly connected to one side of the mounting base 75. The second connecting block 12 is fixedly connected to the side of the second shuttle bed 9. The first pushing mechanism 71 is connected to the first connecting block 77. The second pushing mechanism 72 is connected to the second connecting block 12. A second synchronous belt 78 is installed between the first pushing mechanism 71 and the second pushing mechanism 72. The second servo motor 79 is fixedly installed on one side of the bottom of the outer casing 1. The output shaft of the second servo motor 79 is connected to the second pushing mechanism 72. The first pushing mechanism 71 and the second pushing mechanism 72 have the same structure.

[0031] Specifically, the second servo motor 79 drives the first pushing mechanism 71 to rotate, and the second synchronous belt 78 causes the first pushing mechanism 71 and the second pushing mechanism 72 to work synchronously. Since the first pushing mechanism 71 and the second pushing mechanism 72 have the same structure, the first pushing mechanism 71 can drive the first connecting block 77 so that the mounting base 75 drives the slide plate 74 to slide laterally along the second guide rail 73. The opening 76 on the surface of the auxiliary needle rod 14 is inserted and connected to the second connecting rod 64. The top and bottom of the mounting base 75 are respectively provided with a second guide hole and a insertion hole. The auxiliary needle rod 14 is vertically inserted and installed in the insertion hole. The inner top is inserted and connected to the second guide hole, which facilitates the adjustment of the position of the auxiliary needle rod 14. The second pushing mechanism 72 can drive the second connecting block 12 to make the second shuttle bed 9 slide laterally along the first guide rail 10. The auxiliary needle rod 14 slides laterally synchronously with the second shuttle bed 9, so that the auxiliary needle rod 14 is always at the top of the second shuttle bed 9. Therefore, it is ensured that the auxiliary needle rod 14 can accurately cooperate with the shuttle of the second shuttle bed 9 to hook the line. Furthermore, the crank connecting rod structure composed of crank 61, connecting piece 63, first connecting rod 62 and second connecting rod 64 enables the auxiliary needle rod 14 to reciprocate and lift the line synchronously with the main needle rod 13.

[0032] In this embodiment, both the first pushing mechanism 71 and the second pushing mechanism 72 are composed of a sleeve 710, a screw 711, and a third synchronous pulley 712. The inner wall of the sleeve 710 has an internal thread. The screw 711 is threaded to the sleeve 710 via the internal thread. A platform 713 is formed on one side of the screw 711, and a first threaded hole is formed on the surface of each platform 713. Second threaded holes are formed on the surfaces of the first connecting block 77 and the second connecting block 12. The two ends of the sleeve 710 in the first pushing mechanism 71 and the second pushing mechanism 72 are respectively... The second synchronous belt 78 is rotatably mounted on the top and bottom of the first mounting cavity 2 via bearings. It is connected to the third synchronous pulley 712 in the first pushing mechanism 71 and the second pushing mechanism 72. The screw 711 in the first pushing mechanism 71 is connected to the first connecting block 77 by screws engaging the first and second screw holes. The screw 711 in the second pushing mechanism 72 is threadedly connected to the second connecting block 12 by screws engaging the first and second screw holes. The output shaft of the second servo motor 79 is connected to the sleeve 710 in the second pushing mechanism 72.

[0033] Specifically, the second servo motor 79 drives the sleeve 710 in the first pushing mechanism 71 to rotate. The surfaces of the two sleeves 710 in the first pushing mechanism 71 and the second pushing mechanism 72 are each equipped with a third synchronous pulley 712. Therefore, under the action of the second synchronous belt 78, the two sleeves 710 rotate synchronously. One end of the screw 711 in the first pushing mechanism 71 and the second pushing mechanism 72 is connected to the first connecting block 77 and the second connecting block 12, respectively. Therefore, when the sleeve 710 rotates, the screw 711 drives the corresponding first connecting block 77 and the second connecting block 12 to move forward. When the first connecting block 77 moves forward, it drives the mounting base 75 to make the slide plate 74 slide along the second guide rail 73. When the second connecting block 12 moves forward, it drives the second shuttle bed 9 to move forward along the first guide rail 10. Since the first pushing mechanism 71 and the second pushing mechanism 72 rotate synchronously, the auxiliary needle rod 14 moves synchronously with the second shuttle bed 9. In this way, it can be ensured that the auxiliary needle rod 14 can always cooperate with the shuttle of the second shuttle bed 9 to hook the thread.

[0034] In this embodiment, the first synchronous pulley 68, the second synchronous pulley 69, and the third synchronous pulley 712 are all disposed in the fourth mounting cavity 5.

[0035] In this embodiment, the auxiliary needle bar 14 is positioned correspondingly to the second shuttle bed 9.

[0036] Specifically, this method enables the adjustment component 7 to synchronously drive the auxiliary needle rod 14 and the second shuttle bed 9 to move in position when they are working. The auxiliary needle rod 14 and the second shuttle bed 9 are positioned in a corresponding manner, thus ensuring that the auxiliary needle rod 14 can always cooperate with the shuttle of the second shuttle bed 9 to hook the thread.

[0037] Working principle: Both the first servo motor 611 and the second servo motor 79 are electrically connected to the controller, which is a PLC controller. Therefore, the operator can preset various sewing modes within the PLC controller. The operator can connect to the PLC controller via an external human-machine interface screen, allowing them to directly select the appropriate sewing mode based on the model of the trouser loops being sewn. The controller controls the rotation of the first servo motor 611 and the second servo motor 79. Both servo motors 611 and 79 have built-in encoders that provide real-time feedback on motor speed and position, forming a closed-loop control to ensure positioning accuracy. Therefore, the second servo motor 79 can synchronously drive the first pushing mechanism 71 and the second pushing mechanism 72 to rotate, thereby enabling the auxiliary needle bar 14 and the second shuttle bed 9 to slide and adjust to the corresponding sewing position. This method effectively improves the efficiency of distance adjustment between the main needle bar 13 and the auxiliary needle bar 14 and between the first shuttle bed 8 and the second shuttle bed 9. The operation of the first servo motor 611 causes the drive assembly 6 to synchronously drive the main needle bar 13 and the auxiliary needle bar 14 to reciprocate and rise and fall. The main needle bar 13 cooperates with the first shuttle bed 8 to hook the thread, and the auxiliary needle bar 14 cooperates with the second shuttle bed 9 to loosen the thread. This method facilitates the quick sewing of both ends of the trouser loops.

[0038] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fully automatic double-needle sewing machine, comprising a casing (1), characterized in that: The outer casing (1) is divided into a first mounting cavity (2), a second mounting cavity (3), a third mounting cavity (4), and a fourth mounting cavity (5). The second mounting cavity (3) is located at the top of the third mounting cavity (4). A drive assembly (6) and an adjustment assembly (7) are installed in the second mounting cavity (3) and the third mounting cavity (4). A main needle rod (13) and a secondary needle rod (14) are installed on the drive assembly (6). A first shuttle bed (8) and a second shuttle bed (9) are provided in the third mounting cavity (4). The first shuttle bed (8) is fixedly installed and corresponds to the main needle rod (13). A first guide rail (10) is installed at the bottom of the third mounting cavity (4). The second shuttle bed (9) is slidably installed on the first guide rail. On the surface of the rail (10), the drive assembly (6) is used to synchronously drive the main needle bar (13) and the auxiliary needle bar (14) to reciprocate and work the first shuttle bed (8) and the second shuttle bed (9). The adjustment assembly (7) is used to synchronously adjust the position of the auxiliary needle bar (14) and the second shuttle bed (9). The bottom of the second mounting cavity (3) is provided with a first through hole and a first strip hole. The main needle bar (13) extends to the bottom through the through hole, and the auxiliary needle bar (14) extends to the bottom through the first strip hole. The top of the third mounting cavity (4) is provided with a second through hole and a second strip hole (11). The shuttle of the first shuttle bed (8) is located at the second through hole, and the shuttle of the second shuttle bed (9) is located at the second strip hole (11).

2. The fully automatic double-needle sewing machine according to claim 1, characterized in that: The drive assembly (6) includes two cranks (61) rotatably mounted on both sides of the second mounting cavity (3) via bearings. A first connecting rod (62) is fixedly connected between the two cranks (61). Connecting parts (63) are rotatably mounted on both ends of the first connecting rod (62). A second connecting rod (64) is fixedly connected between the two connecting parts (63). A mounting hole is opened in the middle of the main needle rod (13), and a second fixing rod is inserted into the mounting hole. The main needle rod (13) is located at one end of the second connecting rod (64). A limiting block (65) is also installed on the inner wall of the second mounting cavity (3). A first guide hole is opened on the surface of the limiting block (65). The top of the main needle rod (13) is inserted into the first guide hole. A first rotating rod (66) and a second connecting rod (64) are rotatably mounted on both sides of the top and bottom of the first mounting cavity (2) via bearings. A rotating rod (67) is provided. One end of the first rotating rod (66) extends into the second mounting cavity (3) and is fixedly connected to one of the cranks (61). The surfaces of the first rotating rod (66) and the second rotating rod (67) are respectively equipped with a first synchronous pulley (68) and a second synchronous pulley (69). A first synchronous belt (610) is installed between the first synchronous pulley (68) and the second synchronous pulley (69). A first servo motor (611) is fixedly installed on one side of the top of the housing (1). The output shaft of the first servo motor (611) extends into the first mounting cavity (2) and is fixedly connected to one end of the first connecting rod (62). A drive rod (612) for driving the first shuttle bed (8) and the second shuttle bed (9) is connected between them. One end of the drive rod (612) is fixedly connected to one end of the second rotating rod (67).

3. The fully automatic double-needle sewing machine according to claim 2, characterized in that: The adjustment assembly (7) includes two first pushing mechanisms (71) and second pushing mechanisms (72) respectively rotatably mounted on the top and bottom of the first mounting cavity (2) via bearings. A second guide rail (73) is installed in the second mounting cavity (3). A transversely movable sliding plate (74) is slidably mounted on the surface of the second guide rail (73). A mounting base (75) is fixedly mounted on the front of the sliding plate (74). The mounting base (75) is U-shaped. A second guide hole and a insertion hole are respectively opened on the top and bottom of the mounting base (75). The auxiliary needle rod (14) is vertically inserted into the insertion hole and its top is inserted into the second guide hole. The middle part of the auxiliary needle rod (14) An opening (76) is provided, and the second connecting rod (64) is inserted and connected to the opening (76). A first connecting block (77) is fixedly connected to one side of the mounting base (75), and a second connecting block (12) is fixedly connected to the side of the second shuttle bed (9). A first pushing mechanism (71) is connected to the first connecting block (77), and a second pushing mechanism (72) is connected to the second connecting block (12). A second synchronous belt (78) is installed between the first pushing mechanism (71) and the second pushing mechanism (72). A second servo motor (79) is fixedly installed on one side of the bottom of the outer casing (1), and the output shaft of the second servo motor (79) is connected to the second pushing mechanism (72).

4. The fully automatic double-needle sewing machine according to claim 3, characterized in that: The first pushing mechanism (71) and the second pushing mechanism (72) have the same structure, both consisting of a sleeve (710), a screw (711), and a third synchronous pulley (712). The inner wall of the sleeve (710) is provided with an internal thread, and the screw (711) is threaded to the sleeve (710) through the internal thread. A platform (713) is provided on one side of the screw (711), and a first screw hole is provided on the surface of the platform (713). A second screw hole is provided on the surface of the first connecting block (77) and the second connecting block (12). The two sides of the sleeve (710) in the first pushing mechanism (71) and the second pushing mechanism (72) are connected by a screw thread. The ends are respectively mounted on the top and bottom of the first mounting cavity (2) via bearings. The second synchronous belt (78) is connected to the third synchronous pulley (712) in the first pushing mechanism (71) and the second pushing mechanism (72). The screw (711) in the first pushing mechanism (71) is connected to the first connecting block (77) by screws through the first screw hole and the second screw hole. The screw (711) in the second pushing mechanism (72) is connected to the second connecting block (12) by screws through the first screw hole and the second screw hole. The output shaft of the second servo motor (79) is connected to the sleeve (710) in the second pushing mechanism (72).

5. A fully automatic double-needle sewing machine according to claim 4, characterized in that: The first synchronous pulley (68), the second synchronous pulley (69), and the third synchronous pulley (712) are all located in the fourth mounting cavity (5).

6. The fully automatic double-needle sewing machine according to claim 1, characterized in that: The positions of the auxiliary needle bar (14) and the second shuttle bed (9) are set accordingly.

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