Embroidery machine head with controllable take-up track and take-up method

Abstract

The invention relates to an embroidery machine head with a controllable take-up track and a take-up method, the embroidery machine head comprises a needle bar frame connected with the embroidery machine head, the needle bar frame is provided with an embroidery needle bar and a take-up lever, the embroidery needle bar moves up and down and is controlled by a cam driving device driven by a main shaft, and the take-up lever is attached and connected with take-up teeth to form a take-up assembly. The take-up assembly is connected with a mounting shaft of the needle bar frame, a take-up bar and take-up teeth rotate synchronously, the side edges of the take-up teeth are rotationally connected with rolling bearings through arc-shaped clamping grooves, a connecting shaft in the middle of the rolling bearings is connected with a first connecting rod, and the first connecting rod is connected with a linear shaft driven by an independent motor. According to the invention, the linear shaft driven by the independent motor is used for changing a traditional crankshaft or cam control change take-up track structure, and the take-up track is cooperatively controlled by combining the up-and-down movement of the needle bar of the embroidery machine with the take-up lever driven by the linear shaft, so that the take-up track is adjustable.

Description

Technical Field

[0001] The invention relates to the technical field of embroidery machine head equipment, and in particular to an embroidery machine head with controllable thread picking trajectory and a thread picking method. Background Art

[0002] Traditional embroidery machine heads usually use crankshafts or cam structures to control the thread picking trajectory. The crankshafts or cam structures control the thread picking trajectory using the arc control principle, that is, the thread picking rod is driven by an arc. Although the driving force of this arc or curve changes the thread picking trajectory, this change is limited to the fixed curve. After the setting is completed, it is basically difficult to change the thread picking trajectory. Although this control method can realize the basic thread picking function, the thread picking trajectory is relatively fixed and lacks flexibility, making it difficult to meet the needs of diversified embroidery patterns. With the development of the embroidery industry and the advancement of technology, higher requirements are placed on the thread picking trajectory control of the embroidery machine head, and it is necessary to be able to achieve more complex and sophisticated thread picking trajectories to meet the needs of different embroidery patterns and materials.

[0003] Therefore, the present invention proposes an embroidery machine head with a controllable thread picking trajectory and a thread picking method, aiming to solve the problem that the thread picking trajectory of the traditional embroidery machine head is fixed and lacks flexibility. Summary of the invention

[0004] The invention provides an embroidery machine head with controllable thread picking trajectory and a thread picking method, wherein a linear shaft structure driven by a motor cooperates with an embroidery needle bar to move up and down, thereby realizing precise adjustment of the thread picking trajectory and improving embroidery quality and efficiency.

[0005] An embroidery machine head with a controllable thread picking trajectory comprises a needle bar frame connected to the embroidery machine head, the needle bar frame is equipped with an embroidery needle bar and a thread picking rod, the up and down movement of the embroidery needle bar is controlled by a cam driving device driven by a main shaft, the thread picking rod is fitted and connected to a thread picking tooth to form a thread picking assembly, the thread picking assembly is connected to the mounting shaft of the needle bar frame, the thread picking rod rotates synchronously with the thread picking tooth, the side of the thread picking tooth is rotatably connected to a rolling bearing through an arc-shaped slot, the connecting shaft in the middle of the rolling bearing is connected to a first connecting rod, and the first connecting rod is connected to a linear shaft driven by an independent motor. The present invention changes the traditional crankshaft or cam control thread picking trajectory structure through a linear shaft driven by an independent motor, and the thread picking trajectory is controlled by the up and down movement of the embroidery machine needle bar combined with the thread picking rod driven by the linear shaft, thereby realizing an adjustable thread picking trajectory. The side of the thread take-up tooth is rotatably connected to the rolling bearing through an arc-shaped groove, the connecting shaft in the middle of the rolling bearing is connected to the first connecting rod, and the first connecting rod is connected to the linear shaft driven by the independent motor, thereby realizing the controllable thread take-up trajectory of the embroidery machine head by the thread take-up tooth driving the thread take-up rod under the drive of the linear shaft driven by the independent motor.

[0006] The up-and-down movement direction of the embroidery needle bar controls the rotation direction of the main shaft of the independent motor, and controls the tightness of the embroidery thread loop.

[0007] The height signal of the up and down movement of the embroidery needle bar controls the rotation angle of the main shaft of the independent motor and controls the arc of the embroidery thread embroidery circle.

[0008] The time signal of the up and down movement of the embroidery needle bar controls the rotation speed of the main shaft of the independent motor and controls the embroidery looping time of the embroidery thread.

[0009] The independent motor drives the linear axis through a pulley rotating device, which includes a driving wheel connected to the main shaft of the independent motor, the driving wheel is connected to the driven wheel through a belt, the driven wheel is connected to the linear axis, and a tensioning wheel is provided on the outside of the belt to improve the controlled accuracy and service life of the linear axis.

[0010] The cam driving device includes a cam connecting rod connected to the main shaft, the cam connecting rod is connected to the middle connecting hole of the three-eye connecting rod through a first connecting shaft, one end of the three-eye connecting rod is connected to the embroidery machine head housing through a second connecting shaft, the other end of the three-eye connecting rod is connected to one end of the second connecting rod through a third connecting shaft, the other end of the second connecting rod is connected to the needle bar driver, and the needle bar driver is connected to the embroidery needle bar through a limit rod.

[0011] A thread picking method for an embroidery machine head with a controllable thread picking trajectory, wherein the rotation speed of an independent motor main shaft is controlled by a time signal of the up and down movement of an embroidery needle bar, the rotation angle of the independent motor main shaft is controlled by a height signal of the up and down movement of the embroidery needle bar, the rotation direction of the independent motor main shaft is controlled by the direction of the up and down movement of the embroidery needle bar, the linear shaft driven by the independent motor drives the thread pick-up rod and the thread pick-up teeth to rotate synchronously, and the thread picking trajectory is changed by the rotation angle and speed changes of the thread pick-up rod under the non-crankshaft curve drive in coordination with the up and down movement of the embroidery needle bar.

[0012] The embroidery needle bar pauses in the middle when moving up and down, generating a secondary up and down movement, and an independent motor drives the linear shaft to drive the thread take-up rod and the thread take-up teeth to synchronously drive the embroidery needle bar to generate a secondary thread take-up, so as to further improve the three-dimensional sense and aesthetics of the embroidery thread take-up.

[0013] The present invention can flexibly change the movement trajectory of the embroidery thread by the thread take-up rod through the change of the speed and rotation angle of the independent motor main shaft in conjunction with the height signal, time signal and direction signal of the embroidery needle bar moving up and down, thereby meeting the diverse requirements of different embroidery patterns for the thread take-up trajectory. This thread take-up method not only improves the application range of the embroidery machine, but also greatly enhances the three-dimensional sense and aesthetics of the embroidery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings:

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embroidery machine head with controllable thread picking trajectory according to the present invention;

[0016] Figure 2 It is a schematic diagram of the internal three-dimensional structure of an embroidery machine head with controllable thread picking trajectory according to the present invention;

[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the independent motor driving the thread take-up rod in the present invention;

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the cam driving device in the present invention;

[0019] Figure 5 It is a schematic diagram of the installation structure of the thread take-up lever in the present invention. DETAILED DESCRIPTION

[0020] The following is combined with Figure 1-5 The specific implementation method further describes the technical solution of this patent in detail. An embroidery machine head with a controllable thread picking trajectory includes a needle bar frame 4 connected to the embroidery machine head, the needle bar frame 4 is equipped with an embroidery needle bar 5 and a thread pick-up rod 6, the up and down movement of the embroidery needle bar 5 is controlled by a cam drive device driven by a main shaft 14, the thread pick-up rod 6 is fitted and connected to the thread pick-up tooth 2 to form a thread pick-up assembly, the thread pick-up assembly is connected to the mounting shaft 3 of the needle bar frame 4, the thread pick-up rod 6 rotates synchronously with the thread pick-up tooth 2, the side of the thread pick-up tooth 2 is rotatably connected to the rolling bearing 23 through the arc-shaped slot 24, the connecting shaft 61 in the middle of the rolling bearing 23 is connected to the first connecting rod 7, and the first connecting rod 7 is connected to the linear shaft 13 driven by the independent motor 1.

[0021] As a preferred control structure, the direction of the up-and-down movement of the embroidery needle bar 5 controls the rotation direction of the main shaft of the independent motor 1, and controls the tightness of the embroidery thread loop. The height signal of the up-and-down movement of the embroidery needle bar 5 controls the rotation angle of the main shaft of the independent motor, and controls the arc of the embroidery thread loop. The time signal of the up-and-down movement of the embroidery needle bar 5 controls the speed of the main shaft of the independent motor, and controls the time of the embroidery thread loop.

[0022] In order to improve the driving stability and design service life, the independent motor 1 drives the linear shaft 13 through a pulley rotating device, and the pulley rotating device includes a driving wheel 11 connected to the main shaft of the independent motor 1, the driving wheel 11 is connected to the driven wheel 9 through a belt 8, the driven wheel 9 is connected to the linear shaft 13, and a tensioning wheel 10 is provided on the outside of the belt 8.

[0023] The cam driving device includes a cam connecting rod 16 connected to the main shaft 14, the cam connecting rod 16 is connected to the middle connecting hole of the three-eye connecting rod 17 through the first connecting shaft 25, one end of the three-eye connecting rod 17 is connected to the embroidery machine head housing 35 through the second connecting shaft 15, the other end of the three-eye connecting rod 17 is connected to one end of the second connecting rod 19 through the third connecting shaft 18, the other end of the second connecting rod 19 is connected to the needle bar driver 20, and the needle bar driver 20 is connected to the embroidery needle bar 5 through the limit rod 21.

[0024] A thread picking method for an embroidery machine head with a controllable thread picking trajectory, wherein the speed of an independent motor main shaft is controlled by a time signal of the up and down movement of an embroidery needle bar, the rotation angle of the independent motor main shaft is controlled by a height signal of the up and down movement of the embroidery needle bar, the rotation direction of the independent motor main shaft is controlled by the direction of the up and down movement of the embroidery needle bar 5, the linear shaft 13 driven by an independent motor drives the thread picking rod and the thread picking teeth to rotate synchronously, and the thread picking trajectory is changed by the rotation angle and speed changes under the non-crankshaft curve drive of the thread picking rod in coordination with the up and down movement of the embroidery needle bar, thereby improving the three-dimensional sense and aesthetics of the embroidery thread picking. The non-crankshaft curve drive of the thread picking rod changes the trajectory curve change caused by the traditional crankshaft or cam drive, but there is a problem of a fixed curve change path, and it is not a truly controllable change of the thread picking trajectory.

[0025] As a further control method, the embroidery needle bar 5 pauses in the middle when moving up and down, generating a secondary up and down movement, and the independent motor drives the linear shaft 13 to drive the thread take-up rod and the thread take-up teeth to synchronously cause the embroidery needle bar 5 to generate a secondary thread take-up.

[0026] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. An embroidery machine head with a controllable thread take-up trajectory, comprising a needle bar frame (4) connected to the embroidery machine head, the needle bar frame (4) being equipped with an embroidery needle bar (5) and a thread take-up bar (6), the up and down movement of the embroidery needle bar (5) being controlled by a cam drive device driven by a main shaft (14), characterized in that: The thread taking-up rod (6) is fitted and connected to the thread taking-up tooth (2) to form a thread taking-up assembly, and the thread taking-up assembly is connected to the mounting shaft (3) of the needle bar frame (4). The thread taking-up rod (6) rotates synchronously with the thread taking-up tooth (2). The side of the thread taking-up tooth (2) is rotatably connected to the rolling bearing (23) through the arc-shaped groove (24). The connecting shaft (61) in the middle of the rolling bearing (23) is connected to the first connecting rod (7), and the first connecting rod (7) is connected to the linear shaft (13) driven by the independent motor (1).

2. The embroidery machine head with controllable thread picking trajectory according to claim 1, characterized in that: The direction of the up and down movement of the embroidery needle bar (5) controls the rotation direction of the main shaft of the independent motor (1), thereby controlling the tightness of the embroidery thread loop.

3. The embroidery machine head with controllable thread picking trajectory according to claim 2, characterized in that: The height signal of the up and down movement of the embroidery needle bar (5) controls the rotation angle of the main shaft of the independent motor, thereby controlling the arc of the embroidery thread embroidery circle.

4. The embroidery machine head with controllable thread picking trajectory according to claim 1, characterized in that: The time signal of the up and down movement of the embroidery needle bar (5) controls the rotation speed of the main shaft of the independent motor, thereby controlling the time for the embroidery thread to form a circle.

5. The embroidery machine head with controllable thread picking trajectory according to claim 1, characterized in that: The independent motor (1) drives the linear shaft (13) via a pulley rotating device, the pulley rotating device comprising a driving wheel (11) connected to the main shaft of the independent motor (1), the driving wheel (11) being connected to a driven wheel (9) via a belt (8), the driven wheel (9) being connected to the linear shaft (13), and a tensioning wheel (10) being provided on the outer side of the belt (8).

6. The embroidery machine head with controllable thread picking trajectory according to claim 1, characterized in that: The cam driving device comprises a cam connecting rod (16) connected to a main shaft (14); the cam connecting rod (16) is connected to a middle connecting hole of a three-eye connecting rod (17) via a first connecting shaft (25); one end of the three-eye connecting rod (17) is connected to an embroidery machine head housing (35) via a second connecting shaft (15); the other end of the three-eye connecting rod (17) is connected to one end of a second connecting rod (19) via a third connecting shaft (18); the other end of the second connecting rod (19) is connected to a needle bar driver (20); and the needle bar driver (20) is connected to an embroidery needle bar (5) via a limit rod (21).

7. A thread picking method for an embroidery machine head with a controllable thread picking trajectory according to any one of claims 1 to 6, characterized in that: The speed of the independent motor main shaft is controlled by the time signal of the embroidery needle bar moving up and down, the rotation angle of the independent motor main shaft is controlled by the height signal of the embroidery needle bar moving up and down, the rotation direction of the independent motor main shaft is controlled by the direction of the embroidery needle bar (5) moving up and down, the linear shaft (13) driven by the independent motor drives the thread take-up rod and the thread take-up teeth to rotate synchronously, and the rotation angle and speed change of the thread take-up rod under the non-crankshaft curve drive are coordinated with the up and down movement of the embroidery needle bar to change the thread take-up trajectory.

8. The thread picking method of an embroidery machine head with a controllable thread picking trajectory according to claim 7, characterized in that: The embroidery needle bar (5) pauses in the middle when moving up and down, generating a secondary up and down movement, and the independent motor drives the linear shaft (13) to drive the thread take-up rod and the thread take-up teeth to synchronously move the embroidery needle bar (5) to generate a secondary thread take-up.

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