Motor thread trimming mechanism

Abstract

The utility model discloses a motor thread trimming mechanism, which relates to the technical field of sewing machines and comprises a machine frame, a servo motor, a rotating rod, a gear set, a fixing frame, a tool rest, a transmission arm, a tool, a connecting rod, a coupler, a rotating shuttle, a bottom plate, a working table, a sewing machine body and a transmission device. The time, angle and speed of thread trimming can be accurately controlled, and the stability and consistency of thread trimming are ensured. Compared with a traditional cam thread trimming mechanism, the transmission mode of the servo motor and the gear set is smoother, the mechanical impact and resonance phenomena are avoided, noise and vibration generated in the operation process of the thread trimming mechanism are lower, the working environment is improved, the comfort level of operators is improved, and the production efficiency is improved. The transmission mode of the servo motor avoids the problems of mechanical abrasion and gaps of a traditional cam mechanism, and reduces performance reduction and equipment faults caused by mechanical abrasion.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a motor wire cutting mechanism. Background Art

[0002] In the fields of textile, sewing and automated production, the precise cutting of wire is a key link to ensure product quality and production efficiency. This link is mostly realized by a cam wire cutting mechanism, but the cam wire cutting mechanism has many limitations;

[0003] First of all, the wire cutting cam is prone to wear during long-term use, resulting in an increase in mechanical clearance, which in turn affects the precision and stability of wire cutting. In addition, the cam wire cutting mechanism is prone to mechanical shock and resonance during startup, acceleration, deceleration and stop, which not only increases noise and vibration, but may also cause damage to the equipment. For this reason, we propose a motor wire cutting mechanism. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a motor wire cutting mechanism, which solves the problems put forward in the above background art.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: A motor wire cutting mechanism, comprising:

[0006] A frame;

[0007] A servo motor, which is installed at the front end of the frame;

[0008] A rotating rod, which is rotatably connected to the front end of the frame;

[0009] A gear set, which is fixed outside the servo motor and the rotating rod, and the servo motor drives the rotating rod to rotate through the gear set;

[0010] A fixing bracket, which is fixed at the front end of the frame;

[0011] A tool rest, which is rotatably connected to the outside of the fixing bracket;

[0012] A transmission arm, which is fixed outside the tool rest and the rotating rod, and the rotating rod drives the tool rest to rotate when rotating through the transmission arm.

[0013] Furthermore, for this motor wire cutting mechanism, the gear set includes:

[0014] A first helical gear, which is sleeved on the output end of the servo motor;

[0015] A second helical gear, which is sleeved on the outside of the rotating rod. The first helical gear and the second helical gear are meshed, and the gear ratio of the first helical gear to the second helical gear is 1:2.

[0016] Furthermore, the motor wire cutting mechanism further includes:

[0017] A cutter, which is fixed outside the tool holder and cuts the wire.

[0018] Furthermore, the motor wire cutting mechanism further includes:

[0019] A connecting rod, which is rotatably connected inside the frame;

[0020] A coupling, which is fixed at the front end of the connecting rod;

[0021] A rotating shuttle, which is rotatably connected inside the fixed frame, and the rear end of the rotating shuttle is connected to the front end of the coupling.

[0022] Furthermore, the motor wire cutting mechanism further includes:

[0023] A bottom plate, which is fixed at the lower part of the frame;

[0024] A workbench, which is arranged at the upper part of the frame.

[0025] Furthermore, the motor wire cutting mechanism further includes:

[0026] A sewing machine body, which is fixed at the rear end of the frame;

[0027] A transmission device, which is installed outside the sewing machine body and the connecting rod.

[0028] Compared with the above background technology, the motor wire cutting mechanism provided by the present application includes a frame, a servo motor, a rotating rod, a gear set, a fixed frame, a tool holder, a transmission arm and a cutter. The servo motor drives the rotating rod to rotate through the gear set, so that the transmission arm drives the fixed frame and the tool holder to perform wire cutting operations. Compared with the traditional cam wire cutting mechanism, the above wire cutting mechanism avoids the performance degradation problems caused by cam wear and mechanical clearances, ensures the stability and high efficiency of long-term use, and has lower noise and vibration levels.

[0029] The present utility model provides a motor wire cutting mechanism. Compared with the prior art, it has the following beneficial effects:

[0030] A motor wire cutting mechanism, by using a servo motor as the power source and taking advantage of its characteristics of high precision and high response speed, can accurately control the time, angle, and speed of wire cutting, ensuring the stability and consistency of wire cutting. This helps to improve product quality and reduce the scrap rate. The transmission mode of the servo motor and the gear set is smoother compared to the traditional cam wire cutting mechanism, avoiding mechanical shock and resonance phenomena. The noise and vibration generated during the operation of this wire cutting mechanism are lower, improving the working environment and enhancing the comfort of operators. The servo motor transmission mode avoids the mechanical wear and clearance problems of the traditional cam mechanism, reducing the performance degradation and equipment failures caused by mechanical wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. is a schematic structural diagram of a motor wire cutting mechanism;

[0032] Figure 2 FIG. is a schematic bottom structural diagram of a motor wire cutting mechanism;

[0033] Figure 3 FIG. is a schematic partial structural diagram of a motor wire cutting mechanism;

[0034] Figure 4 FIG. is a schematic structural diagram of the wire cutting mechanism from the first perspective in a motor wire cutting mechanism;

[0035] Figure 5 FIG. is a schematic structural diagram of the wire cutting mechanism from the second perspective in a motor wire cutting mechanism;

[0036] Figure 6 FIG. is a schematic structural diagram of the wire cutting mechanism from the third perspective in a motor wire cutting mechanism.

[0037] In the figures: 1, frame; 2, servo motor; 3, rotating rod; 4, gear set; 41, first helical gear; 42, second helical gear; 5, fixing bracket; 6, tool holder; 7, transmission arm; 8, tool; 9, connecting rod; 10, coupling; 11, rotary hook; 12, bottom plate; 13, workbench; 14, sewing machine body; 15, transmission device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figure 1-6, the present utility model provides a technical solution for a motorized thread cutting mechanism: A motorized thread cutting mechanism includes a frame 1, a servo motor 2, a rotating rod 3, a gear set 4, a fixed bracket 5, a tool holder 6, a transmission arm 7, a cutting tool 8, a connecting rod 9, a coupling 10, a rotary hook 11, a bottom plate 12, a workbench 13, a sewing machine body 14, and a transmission device 15. Specifically, the servo motor 2, the rotating rod 3, the gear set 4, the fixed bracket 5, the tool holder 6, the transmission arm 7, and the cutting tool 8 form a thread cutting mechanism. The servo motor 2 is used as the power source. The servo motor 2 is known for its high precision and high response speed, and can accurately control the time, angle, and speed of thread cutting, ensuring the stability and consistency of thread cutting. Compared with the traditional cam thread cutting mechanism, the transmission method of the servo motor 2 avoids the performance degradation problems caused by cam wear and mechanical clearances, ensures the stability and efficiency of long-term use, has lower noise and vibration levels, and because the servo motor 2 can achieve smooth start, acceleration, deceleration, and stop, it avoids mechanical shock and resonance phenomena;

[0040] The gear set 4 is composed of a first helical gear 41 sleeved on the output end of the servo motor 2 and a second helical gear 42 sleeved outside the rotating rod 3, and the gear ratio is 1:2. The meshing connection between the first helical gear 41 and the second helical gear 42, and the gear ratio design of 1:2 not only realizes the effective transmission of power, reduces noise and vibration during the transmission process, but also enhances the stability of the thread cutting action by reducing speed and increasing torque, and reduces errors caused by mechanical vibration.

[0041] In actual use of this motorized thread cutting mechanism, the servo motor 2 drives the first helical gear 41 to rotate, which in turn drives the second helical gear 42 and the rotating rod 3 to rotate. Through the transmission arm 7, the rotating rod 3 pulls the tool holder 6 to rotate outside the fixed bracket 5, and then the tool holder 6 drives the cutting tool 8 to move. Thus, the forward and reverse driving of the servo motor 2 realizes the reciprocating rotation of the tool holder 6 and the cutting tool 8, and then completes the thread cutting operation.

Claims

1. A motorized wire cutting mechanism, characterized in that, Comprising: Frame (1); Servo motor (2), which is installed at the front end of the frame (1); Rotating rod (3), which is rotatably connected to the front end of the frame (1); Gear set (4), which is fixed outside the servo motor (2) and the rotating rod (3), and enables the servo motor (2) to drive the rotating rod (3) to rotate through the gear set (4); Fixed bracket (5), which is fixed to the front end of the frame (1); Tool holder (6), which is rotatably connected to the outside of the fixed bracket (5); Drive arm (7), which is fixed outside the tool holder (6) and the rotating rod (3), and enables the rotating rod (3) to drive the tool holder (6) to rotate when the rotating rod (3) rotates through the drive arm (7).

2. The motor wire cutting mechanism according to claim 1, characterized in that, The gear set (4) includes: Helical gear one (41), which is sleeved on the output end of the servo motor (2); Helical gear two (42), which is sleeved on the outside of the rotating rod (3). The helical gear one (41) and the helical gear two (42) are meshed, and the gear ratio of the helical gear one (41) and the helical gear two (42) is 1:

2.

3. A motor wire cutting mechanism according to claim 1, characterized in that, Also included is: Tool (8), which is fixed outside the tool holder (6) and shears the wire.

4. The motor wire cutting mechanism according to claim 1, wherein Also included is: Connecting rod (9), which is rotatably connected inside the frame (1); Coupling (10), which is fixed to the front end of the connecting rod (9); Rotary hook (11), which is rotatably connected inside the fixed bracket (5), and the rear end of the rotary hook (11) is connected to the front end of the coupling (10).

5. A motor wire cutting mechanism according to claim 1, characterized in that, Also included is: Bottom plate (12), which is fixed to the lower part of the frame (1); Workbench (13), which is arranged on the upper part of the frame (1).

6. The motor wire cutting mechanism according to claim 1, wherein Also included is: Sewing machine body (14), which is fixed to the rear end of the frame (1); Transmission device (15), which is installed outside the sewing machine body (14) and the connecting rod (9).

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