Routing control device of sewing machine

Abstract

The utility model provides a routing control device of a sewing machine, and belongs to the technical field of sewing machines. The technical problem that an existing sewing machine is insufficient in routing stability and reliability is solved. The thread bonding control device of the sewing machine comprises a crank rod fixedly connected to the periphery of the output end of a stepping motor, a vertically-arranged sliding rail is fixedly arranged on a machine base, a sliding plate capable of moving vertically is connected to the sliding rail in a sliding mode, the crank rod is obliquely and upwards arranged, and the outer end of the crank rod is hinged to the sliding plate through a connecting rod. The machine base is rotationally connected with a swing rod, the movable end of the swing rod always tends to move towards the sliding plate, the movable end of the swing rod is rotationally connected with a rolling shaft perpendicular to the sliding plate, the vertical edge of the sliding plate is provided with a notch groove, the inner wall of the notch groove is provided with a guide face which is obliquely arranged upwards from inside to outside, and the rolling shaft is located in the notch groove and abuts against the guide face. The swing rod is in transmission connection with the thread loosening shaft and can drive the thread loosening shaft to rotate when the rolling shaft slides upwards along the guide face. According to the utility model, the wire bonding stability is ensured and the wire bonding effect can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing machines and relates to a thread-stitching control device of a sewing machine. Background Art

[0002] After the sewing machine stops sewing, it needs to lift the presser foot, trim the thread and loosen the thread. The traditional interlock sewing machine realizes this through two driving sources. One driving source drives the thread beating and loosening and trimming mechanism, and the other driving source drives the presser foot lifting and loosening mechanism.

[0003] The patent with authorization announcement number CN209039718U discloses an automatic presser foot lifting and thread punching mechanism and a sewing machine, including a driving motor, a cam assembly is provided on the driving motor, the driving motor drives the cam assembly to rotate, the cam assembly includes a cylindrical cam, and also includes a starting rod, a sliding pin is provided on the starting rod, an annular groove and a groove are provided on the cylindrical cam, the annular groove and the groove are connected, the cam assembly drives the cylindrical cam to rotate, and when the cylindrical cam rotates, the sliding pin slides in the annular groove and the groove.

[0004] The above-mentioned mechanism can control the thread punching and presser foot lifting operations by driving the motor, wherein the thread punching action is achieved by guiding the sliding pin action through the groove on the cylindrical cam. In order to form a faster thread punching speed and improve the thread punching effect, the transition of the inner wall of the groove needs to be steeper, which will increase the risk of sticking and affect the stability and reliability of the thread punching. Summary of the invention

[0005] The utility model aims at the above-mentioned problems existing in the prior art and provides a thread-stitching control device for a sewing machine. The technical problem to be solved by the utility model is to improve the stability and reliability of the thread-stitching operation of the sewing machine.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A thread-beating control device for a sewing machine, the sewing machine comprises a machine base, a thread-releasing shaft is rotatably connected to the machine base, a thread-beating rod is connected to the thread-releasing shaft, a horizontally arranged stepping motor is arranged in the machine base, and the thread-beating control device comprises a crank rod fixedly connected to the outer periphery of the output end of the stepping motor, a vertically arranged slide rail is fixedly provided on the machine base, a slide rail is slidably connected to a slide rail that can move vertically, the crank rod is arranged to be inclined upward and the outer end is hinged to the slide rail through a connecting rod, a swing rod whose active end always has a tendency to move toward the slide rail is also rotatably connected to the machine base, the active end of the swing rod is rotatably connected to a roller perpendicular to the slide rail, the vertical edge of the slide rail has a notch groove, the inner wall of the notch groove has a guide surface arranged upward from the inside to the outside, the roller is located in the notch groove and abuts against the guide surface, the swing rod is transmission-connected to the thread-releasing shaft and can drive the thread-releasing shaft to rotate when the roller slides upward along the guide surface.

[0008] The machine base is the mounting frame of the sewing machine. The thread loosening shaft arranged on the machine base can be driven to rotate and drive the thread loosening operation, and the thread beating rod is driven to perform the thread beating operation when the thread loosening shaft rotates. The stepper motor as a driving source can accurately rotate back and forth, which is conducive to accurately controlling the thread beating action of the sewing machine. By setting a crank rod fixedly connected to the output end of the stepper motor, the crank rod is tilted upward and hinged to the slide plate through a connecting rod. At the same time, a notch groove is opened on the edge of the slide plate that can slide vertically along the slide rail, and the movable end of the rocker rod connected to the thread loosening shaft and the inclined guide surface of the inner wall of the notch groove act. In this way, the slide plate can convert the torque of the stepper motor into a linear power with a more stable trajectory and easy to convert under the guidance of the slide rail. When the crank rod swings downward, the slide plate is in an accelerated state, so that the guide surface drives the rocker rod to move and is also in an accelerated state, so that the thread beating action can be accelerated and completed in an instant, ensuring the thread beating stability while improving the thread beating effect.

[0009] In the thread-binding control device of the sewing machine, a tension spring is connected to the machine base, and the end of the tension spring is connected to the movable end of the swing rod and makes the roller always abut against the slide plate. In this way, the tension spring can conveniently and stably ensure the reset trend of the swing rod, so that the roller can reliably slide into the notch when the slide plate moves upward to reset, ensuring the stability of the subsequent thread-binding action.

[0010] In the thread-binding control device of the sewing machine, the end of the thread-releasing shaft away from the thread-binding rod is connected to a transmission arm arranged radially, and the swing arm is hinged to the outer end of the transmission arm through the thread-releasing connecting rod. In this way, the thread-releasing connecting rod is driven by the swing arm to move, and the transmission arm is rigidly driven to swing to realize the thread-releasing and thread-binding operations, thereby ensuring stable and reliable operation.

[0011] In the thread-binding control device of the sewing machine, a presser foot lifting shaft that can move vertically is connected to the machine base, a lifting seat is fixed on the slide board, and the lifting seat is connected to the presser foot lifting shaft in a transmission manner. The presser foot lifting shaft is an existing component, and the lifting seat that moves synchronously with the slide board controls the movement of the presser foot lifting shaft, which can better achieve the synchronization effect of presser foot lifting, thread loosening and thread binding while ensuring high-precision action input.

[0012] In the thread-stitching control device of the above-mentioned sewing machine, a presser foot lifting rod is rotatably connected to the machine base, and the lifting base is hinged to the presser foot lifting rod via a connecting plate. The sewing machine also includes two L-shaped lever plates, both of which are rotatably connected to the machine base in the middle. The two lever plates are arranged in parallel and one movable end is hinged to each other through a horizontally arranged pull rod. The middle section of the presser foot lifting rod is hinged to the other movable end of the lever plate above through a vertically arranged pull rod. The other lever plate is arranged close to the presser foot lifting shaft, and the other movable end of the lever plate is hinged to a positioning frame fixedly connected to the presser foot lifting shaft below through a hook ring. When the lifting seat slides downward, the pull rod can be driven to move vertically downward through the presser foot lifting rod, thereby pulling one movable end of the lever plate above, causing the lever plate to rotate and causing the other movable end to pull the lever plate close to the presser foot lifting shaft to rotate through the horizontally arranged pull rod, thereby causing the movable end of the lever plate to lift the positioning frame through the hook ring and thereby drive the entire presser foot lifting shaft to move upward, and the presser foot lifting shaft can be reset through the existing mechanism, thereby finally driving the vertical pull rod to move upward to achieve a reset effect.

[0013] In the thread-stitching control device of the sewing machine, the lifting seat has a waist-shaped hole extending vertically, and the lifting seat is fixedly connected to the slide plate via a connecting piece passing through the waist-shaped hole. This facilitates the user to adjust the relative vertical position of the lifting seat and the slide plate, thereby realizing linkage fine adjustment of the two actions and improving applicability.

[0014] Compared with the prior art, the advantages of the utility model are as follows:

[0015] The slide plate of the thread-punching control device of the sewing machine can convert the torque of the stepper motor into a linear power with a more stable trajectory and easy conversion under the guidance of the slide rail, and the slide plate is in an accelerated state when the crank rod swings downward, so that the guide surface also accelerates when driving the swing rod to move, so that the thread-punching action can be completed in an instant, thereby ensuring the thread-punching stability and improving the thread-punching effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of this embodiment.

[0017] Figure 2 yes Figure 1 Enlarged view of part A in .

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the hidden machine base and stepper motor of this embodiment.

[0019] Figure 4 It is a three-dimensional schematic diagram of the local structure of this embodiment.

[0020] In the figure, 1, machine base; 2, wire release shaft; 3, wire beating rod; 4, stepping motor; 5, crank rod; 6, slide rail;

[0021] 7. slide plate; 71. notch groove; 711. guide surface;

[0022] 8. Connecting rod; 9. Swing rod; 10. Roller; 11. Tension spring; 12. Transmission arm; 13. Thread release connecting rod; 14. Presser foot lifting shaft;

[0023] 15. Lifting seat; 151. Waist-shaped hole;

[0024] 16. Presser foot lifting rod; 17. Connecting plate; 18. Lever plate; 19. Pull rod; 20. Hook ring; 21. Positioning frame; 22. Connecting piece. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] like Figure 1-4As shown, in the thread-beating control device of the sewing machine, the sewing machine includes a machine base 1, a thread-releasing shaft 2 is rotatably connected to the machine base 1, a thread-beating rod 3 is connected to the thread-releasing shaft 2, a horizontally arranged stepping motor 4 is arranged in the machine base 1, and the thread-beating control device includes a crank rod 5 fixedly connected to the outer periphery of the output end of the stepping motor 4, a vertically arranged slide rail 6 is fixedly arranged on the machine base 1, a vertically movable slide plate 7 is slidably connected to the slide rail 6, the crank rod 5 is tilted upward and the outer end is hinged to the slide plate 7 through a connecting rod 8, the machine base 1 A swing rod 9 is also rotatably connected to the top, and its movable end always has a tendency to move toward the skateboard 7. The movable end of the swing rod 9 is rotatably connected to a roller 10 perpendicular to the skateboard 7. The vertical edge of the skateboard 7 has a notch groove 71. The inner wall of the notch groove 71 has a guide surface 711 inclined upward from the inside to the outside. The roller 10 is located in the notch groove 71 and abuts against the guide surface 711. The swing rod 9 is transmission-connected to the loosening shaft 2 and can drive the loosening shaft 2 to rotate when the roller 10 slides upward along the guide surface 711. The machine base 1 is the mounting frame of the sewing machine. The thread loosening shaft 2 arranged on the machine base 1 can be driven to rotate and drive the thread loosening operation, and the thread beating rod 3 is driven to perform the thread beating operation when the thread loosening shaft 2 rotates. The stepping motor 4 as a driving source can accurately rotate back and forth, which is conducive to accurately controlling the thread beating action of the sewing machine; by setting a crank rod 5 fixedly connected to the output end of the stepping motor 4, the crank rod 5 is tilted upward and hinged with the slide plate 7 through the connecting rod 8, and at the same time, a notch groove 71 is provided on the edge of the slide plate 7 that can slide vertically along the slide rail 6, and the movable end of the swing rod 9 connected to the thread loosening shaft 2 and the inclined guide surface 711 of the inner wall of the notch groove 71 are acted upon, so that the slide plate 7 can convert the torque of the stepping motor 4 into a linear power with a more stable trajectory and easy to convert under the guidance of the slide rail 6, and when the crank rod 5 swings downward, the slide plate 7 is in an accelerated state, so that the guide surface 711 drives the swing rod 9 to move and is also in an accelerated state, so that the thread beating action can be accelerated and completed in an instant, ensuring the thread beating stability while improving the thread beating effect. The machine base 1 is connected with a tension spring 11, and the end of the tension spring 11 is connected to the movable end of the swing rod 9 and makes the roller 10 always abut against the slide plate 7. In this way, the resetting trend of the swing rod 9 can be conveniently and stably guaranteed by the tension spring 11, so that the roller 10 can reliably slide into the notch groove 71 when the slide plate 7 moves upward to reset, and the subsequent wire-beating action is guaranteed to be stable. Specifically, the end of the wire-releasing shaft 2 away from the wire-beating rod 3 is connected with a transmission arm 12 arranged radially, and the swing rod 9 is hinged to the outer end of the transmission arm 12 through the wire-releasing connecting rod 13. In this way, the wire-releasing and wire-beating operations are realized by the swing rod 9 driving the wire-releasing connecting rod 13 to move and rigidly driving the transmission arm 12 to swing, thereby ensuring stable and reliable operation. The machine base 1 is connected with a presser foot lifting shaft 14 that can move vertically, and a lifting seat 15 is fixedly provided on the slide plate 7, and the lifting seat 15 is transmission-connected with the presser foot lifting shaft 14. The presser foot lifting shaft 14 is an existing component, and the action of the presser foot lifting shaft 14 is controlled by a lifting seat 15 which moves synchronously with the slide plate 7, which can better achieve the synchronous effect of presser foot lifting, thread loosening and thread stitching while ensuring high-precision action input.A presser foot lifting rod 16 is rotatably connected to the machine base 1, and the lifting base 15 is hinged to the presser foot lifting rod 16 via a connecting plate 17. The sewing machine also includes two L-shaped lever plates 18, both of which are rotatably connected to the machine base 1 in the middle. The two lever plates 18 are arranged in parallel and one movable end is hinged through a horizontally arranged pull rod 19. The middle section of the presser foot lifting rod 16 is hinged to the other movable end of the upper lever plate 18 through the vertically arranged pull rod 19. The other lever plate 18 is arranged close to the presser foot lifting shaft 14, and the other movable end of the lever plate 18 is hinged to a positioning frame 21 fixedly connected to the presser foot lifting shaft 14 below through a hook ring 20. In this way, when the lifting seat 15 slides downward, the presser foot lifting rod 16 can drive the pull rod 19 to move vertically downward, thereby pulling one movable end of the upper lever plate 18, so that the lever plate 18 rotates and the other movable end pulls the lever plate 18 near the presser foot lifting shaft 14 through the horizontally arranged pull rod 19 to rotate, so that the movable end of the lever plate 18 lifts the positioning frame 21 through the hook ring 20, thereby driving the entire presser foot lifting shaft 14 to move upward, and the presser foot lifting shaft 14 can be reset through the existing mechanism, thereby finally driving the vertical pull rod 19 to move upward to achieve the reset effect. The lifting seat 15 has two vertically extending waist-shaped holes 151, and the lifting seat 15 is fixedly connected to the slide plate 7 through the connecting piece 22 that passes through the waist-shaped holes 151, and the connecting piece 22 is a bolt. This is conducive to the user adjusting the relative vertical position of the lifting seat 15 and the slide plate 7, thereby realizing the linkage fine adjustment of the presser foot lifting and threading action, and improving applicability.

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A thread-beating control device for a sewing machine, the sewing machine comprising a machine base (1), a thread-releasing shaft (2) being rotatably connected to the machine base (1), a thread-beating rod (3) being connected to the thread-releasing shaft (2), a stepping motor (4) being arranged horizontally in the machine base (1), and characterized in that: The wire-beating control device comprises a crank rod (5) fixedly connected to the outer periphery of the output end of the stepper motor (4); a vertically arranged slide rail (6) is fixedly provided on the machine base (1); a vertically movable slide plate (7) is slidably connected to the slide rail (6); the crank rod (5) is arranged to face upward in an inclined manner and the outer end is hinged to the slide plate (7) through a connecting rod (8); a swing rod (9) whose movable end always has a tendency to move toward the slide plate (7) is rotatably connected to the machine base (1); the movable end of the swing rod (9) is rotatably connected to the slide plate (7); A roller (10) is movably connected to the slide plate (7) and is perpendicular to the slide plate (7). The vertical edge of the slide plate (7) has a notch groove (71). The inner wall of the notch groove (71) has a guide surface (711) arranged upwardly and tilted from the inside to the outside. The roller (10) is located in the notch groove (71) and abuts against the guide surface (711). The swing rod (9) is transmission-connected to the wire loosening shaft (2) and can drive the wire loosening shaft (2) to rotate when the roller (10) slides upward along the guide surface (711).

2. The thread-stitching control device for a sewing machine according to claim 1, characterized in that: A tension spring (11) is connected to the machine base (1), and the end of the tension spring (11) is connected to the movable end of the swing rod (9) so that the roller (10) always abuts against the slide plate (7).

3. The thread-stitching control device for a sewing machine according to claim 1 or 2, characterized in that: One end of the wire loosening shaft (2) away from the wire beating rod (3) is connected to a transmission arm (12) arranged radially, and the swing rod (9) is hinged to the outer end of the transmission arm (12) via a wire loosening connecting rod (13).

4. The thread-stitching control device for a sewing machine according to claim 1 or 2, characterized in that: The machine base (1) is connected to a presser foot lifting shaft (14) that can move vertically, and the slide plate (7) is fixedly provided with a lifting seat (15), and the lifting seat (15) is drivingly connected to the presser foot lifting shaft (14).

5. The thread-stitching control device for a sewing machine according to claim 4, characterized in that: A presser foot lifting rod (16) is rotatably connected to the machine base (1), and the lifting base (15) is hinged to the presser foot lifting rod (16) via a connecting plate (17). The sewing machine also includes two L-shaped lever plates (18) both of which are rotatably connected to the machine base (1) at the middle. The two lever plates (18) are arranged in parallel and hinged to each other at one movable end via a horizontally arranged pull rod (19). The middle section of the presser foot lifting rod (16) is hinged to the other movable end of the lever plate (18) above via a vertically arranged pull rod (19). The other lever plate (18) is arranged close to the presser foot lifting shaft (14), and the other movable end of the lever plate (18) is hinged to a positioning frame (21) fixedly connected to the presser foot lifting shaft (14) below via a hook ring (20).

6. The thread-stitching control device for a sewing machine according to claim 5, characterized in that: The lifting seat (15) is provided with a waist-shaped hole (151) extending vertically, and the lifting seat (15) is fixedly connected to the slide plate (7) via a connecting piece (22) passing through the waist-shaped hole (151).

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