Bidirectional thread trimming mechanism of high-speed pattern sewing machine

Abstract

The utility model discloses a two-way thread trimming mechanism of a high-speed pattern sewing machine, which comprises a first movable blade (1), a second movable blade (2), a rotating shaft (3) and a motor (4), the first movable blade (1) and the second movable blade (2) are both positioned on two sides above the rotating shaft (3), the first movable blade (1) and the second movable blade (2) are both in a cambered surface shape, and the motor (4) is arranged on the rotating shaft (3). The first movable blade (1) and the second movable blade (2) are both coaxial with the rotating shaft (3), and the motor (4) drives the first movable blade (1) and the second movable blade (2) to rotate oppositely. Two limiting plates (5) are arranged on the rotating shaft (3), a first rotating plate (6) and a second rotating plate (7) are arranged between the two limiting plates (5), the first rotating plate (6) is connected with the first movable blade (1), and the second rotating plate (7) is connected with the second movable blade (2). The sewing machine has the advantage that the sewing quality of the fabric can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to high -speed pattern machine field especially, and it relates to a high -speed pattern machine bidirectional thread cutting mechanism. BACKGROUND

[0002] High -speed pattern machine (referred to as pattern machine) is the equipment that is generally used in clothing industry, and the pattern machine has a thread cutting mechanism, which cuts the thread after sewing to separate the fabric from the high -speed pattern machine.

[0003] The existing thread cutting mechanism includes a fixed blade in an arc shape and a movable blade in an arc shape, the fixed blade is fixed to the rack of the pattern machine, the movable blade is rotationally connected to the rack of the pattern machine, a motor is arranged on the rack of the pattern machine, the motor is connected to the control system of the pattern machine, the output end of the motor is connected to the movable blade, and the thread passes between the fixed blade and the movable blade. When the sewing is completed, the motor drives the movable blade to rotate towards the fixed blade, so that the thread is cut off.

[0004] The existing thread cutting mechanism has the following defects: the thread is dragged by the movable blade and has a large transverse displacement near the cutting position, which can cause the residual thread on the fabric to be relatively long. The needle of the pattern machine can bring the residual thread into the lower part of the fabric and interweave and wind with the bottom thread, so that the fabric forms a thread head at the initial end of the lock stitch. In the case that the residual thread is relatively long, the range of interweaving and winding of the residual thread at the bottom of the fabric is large, and a "bird nest" appears, which affects the appearance effect of sewing and reduces the quality of the product. INVENTION CONTENTS

[0005] The utility model discloses a high -speed pattern machine bidirectional thread cutting mechanism.

[0006] The utility model discloses a technical scheme of a high -speed pattern machine bidirectional thread cutting mechanism, which comprises a first movable blade, a second movable blade, a rotating shaft and a motor.

[0007] In the foregoing high -speed pattern machine bidirectional thread cutting mechanism, two limiting plates are arranged on the rotating shaft, a first rotating plate and a second rotating plate are arranged between the two limiting plates, the first rotating plate and the second rotating plate are coaxially penetrated by the rotating shaft, the first rotating plate is connected to the first movable blade, and the second rotating plate is connected to the second movable blade.

[0008] The lower portion of the first movable blade is screw-connected with the first rotating plate, and the lower portion of the second movable blade is screw-connected with the second rotating plate.

[0009] The lower portion of the first movable blade is screw-connected with the first rotating plate, and the lower portion of the second movable blade is screw-connected with the second rotating plate.

[0010] The lower portion of the first movable blade is screw-connected with the first rotating plate, and the lower portion of the second movable blade is screw-connected with the second rotating plate.

[0011] Compared with the prior art, the original structure of one fixed blade and one movable blade is improved to two movable blades in the high-speed pattern machine bidirectional thread cutting mechanism, the two movable blades rotate towards each other, the two sides of the sewing thread are simultaneously stressed when the sewing thread is cut, the sewing thread cannot be dragged by the blade to horizontally displace, the thread end remaining on the fabric after cutting is short, the "bird nest" on the fabric is effectively avoided, and the sewing quality of the fabric can be improved.

[0012] In addition, through further optimization of the structure, the two movable blades are linked in structure and driven by the same motor, the number of motors is not increased, the cost increase of the cutting mechanism is small, the original control system of the pattern machine does not need to be changed in structure, and the adaptive adjustment of the rotation angle of the motor when cutting the thread can be performed on the program, so that the pattern machine is convenient to transform and use. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a front view of the utility model.

[0014] Figure 2 is Figure 1 is a sectional view at A-A.

[0015] Figure 3 is a front view of the utility model.

[0016] The marks in the drawings are: 1-first movable blade, 2-second movable blade, 3-rotating shaft, 4-motor, 5-limiting plate, 6-first rotating plate, 7-second rotating plate, 8-first connecting rod, 9-second connecting rod, 10-driving plate, 11-third connecting rod, 12-fourth connecting rod, 13-thread groove. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0018] Example. A bidirectional thread-cutting mechanism for a high-speed pattern cutting machine, such as... Figures 1 to 3 As shown, it includes a first movable blade 1, a second movable blade 2, a rotating shaft 3, and a motor 4. The first movable blade 1 and the second movable blade 2 are both located on the upper sides of the rotating shaft 3. The first movable blade 1 and the second movable blade 2 are both arc-shaped. The first movable blade 1 and the second movable blade 2 are both coaxial with the rotating shaft 3. The motor 4 drives the first movable blade 1 and the second movable blade 2 to rotate in opposite directions.

[0019] The rotating shaft 3 is provided with two limiting plates 5, and a first rotating plate 6 and a second rotating plate 7 are provided between the two limiting plates 5. Both the first rotating plate 6 and the second rotating plate 7 are coaxially passed through by the rotating shaft 3. The first rotating plate 6 is connected to the first movable blade 1, and the second rotating plate 7 is connected to the second movable blade 2. The two limiting plates 5 are used to limit the axial position of the first movable blade 1 and the second movable blade 2.

[0020] Below the rotating shaft 3, there is a first connecting rod 8 and a second connecting rod 9. The output end of the motor 4 is provided with a drive plate 10. The middle part of the drive plate 10 is fixed to the output end of the motor 4. One end of the first connecting rod 8 is hinged to one end of the drive plate 10. The other end of the first connecting rod 8 is hinged to a third connecting rod 11. The third connecting rod 11 is fixed to the lower part of the first rotating plate 6. One end of the second connecting rod 9 is hinged to the other end of the drive plate 10. The other end of the second connecting rod 9 is hinged to a fourth connecting rod 12. The fourth connecting rod 12 is fixed to the lower part of the second rotating plate 7.

[0021] The first movable blade 1 is provided with a V-shaped groove 13, which faces the second movable blade 2. The outer diameter of the first movable blade 1 matches the outer diameter of the second movable blade 2.

[0022] The first movable blade 1 is screwed to the first rotating plate 6, and the second movable blade 2 is screwed to the second rotating plate 7.

[0023] The motor 4 is preferably a stepper motor with a driver.

[0024] The installation of this utility model on the pattern making machine: the motor 4 is fixed to the frame of the pattern making machine, the rotating shaft 3 is fixed to the frame of the pattern making machine, and the motor 4 is connected to the control system of the pattern making machine.

[0025] Working principle: such as Figure 1 and Figure 3As shown, in the initial state, a larger gap is reserved between the first movable blade 1 and the second movable blade 2, the sewing thread passes between the first movable blade 1 and the second movable blade 2, and the position of the sewing thread corresponds to the position of the thread groove 13. When the sewing is completed and the sewing thread needs to be cut, the motor 4 is started to drive the driving plate 10 to rotate clockwise. The upper end of the driving plate 10 drives the second rotating plate 7 to rotate counterclockwise through the second connecting rod 9 and the fourth connecting rod 12, and the second rotating plate 7 drives the second movable blade 2 to rotate counterclockwise; the lower end of the driving plate 10 drives the first rotating plate 6 to rotate clockwise through the first connecting rod 8 and the third connecting rod 11, and the first rotating plate 6 drives the first movable blade 1 to rotate clockwise. The first movable blade 1 and the second movable blade 2 are close to each other and simultaneously release the sewing thread, and after the second movable blade 2 passes from the outside of the first movable blade 1, the sewing thread is cut at the thread groove 13.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the present application.

Claims

1. A high speed pattern machine bidirectional thread cutting mechanism, characterized in that: The utility model provides a kind of cutting machine, including first movable blade (1), second movable blade (2), rotating shaft (3) and motor (4), first movable blade (1) and second movable blade (2) are located the upper two sides of rotating shaft (3), first movable blade (1) and second movable blade (2) are both arc surface, first movable blade (1) and second movable blade (2) are coaxial with rotating shaft (3), motor (4) drives first movable blade (1) and second movable blade (2) opposite rotation.

2. The high speed pattern machine bidirectional thread shearing mechanism according to claim 1, characterized in that: Two limit plates (5) are equipped on the rotating shaft (3), first rotating plate (6) and second rotating plate (7) are equipped between the two limit plates (5), first rotating plate (6) and second rotating plate (7) are both coaxial by rotating shaft (3) passes, first rotating plate (6) is connected first movable blade (1), second rotating plate (7) is connected second movable blade (2).

3. The high speed pattern cutting mechanism according to claim 2, wherein: The lower of rotating shaft (3) is equipped with first connecting rod (8) and second connecting rod (9), the output of motor (4) is equipped with driving plate (10), the middle part of driving plate (10) is fixed with the output of motor (4), one end of first connecting rod (8) is hinged with one end of driving plate (10), the other end of first connecting rod (8) is hinged with third connecting rod (11), third connecting rod (11) is fixed with the lower part of first rotating plate (6), one end of second connecting rod (9) is hinged with the other end of driving plate (10), the other end of second connecting rod (9) is hinged with fourth connecting rod (12), fourth connecting rod (12) is fixed with the lower part of second rotating plate (7).

4. The high speed pattern cutting mechanism of claim 1, wherein: V-shaped wire slot (13) is equipped on the first movable blade (1), wire slot (13) is towards second movable blade (2), the outer diameter of first movable blade (1) cooperates with the outer diameter of second movable blade (2).

5. The high speed pattern cutting mechanism of claim 2, wherein: First movable blade (1) is screw connected with first rotating plate (6), second movable blade (2) is screw connected with second rotating plate (7).

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