Thread cutting drive mechanism for tubular stitching embroidery machine

Abstract

To provide a thread-cutting driving mechanism of a tube embroidery machine.SOLUTION: On a needle plate base, there are provided: a stationary knife; and a thread-cutting movable knife including a movable knife wheel rotatably connected to the needle plate base. A driving shaft for driving the movable knife wheel is arranged on a shuttle box, and the driving shaft is driven in conjunction by a driving motor and a transmission structure. Thereby, the movable knife wheel is rotated, and in conjunction with this, the thread-cutting movable knife is rotated around a rotary shuttle and cooperates with the stationary knife to cut a thread. By rotating the movable knife wheel through the driving shaft instead of a swing rod, the movable knife is driven in conjunction so as to be rotated and cuts the thread. As a result, a space occupied by a driving mechanism for driving a thread-cutting mechanism as a whole is reduced, transmission is stabilized, and thread-cutting reliability is improved.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to the technical field of embroidery machines, and particularly to a thread cutting drive mechanism of a cylinder sewing embroidery machine.

Background Art

[0002] Cylinder sewing refers to a form of embroidering an embroidery product having a circumferential surface such as a hat, the hem of trousers, sleeves, etc. Conventional cylinder sewing embroidery machines generally include a thread cutting device for cutting the thread after embroidering the target pattern. Conventional thread cutting mechanisms are generally driven by a motor and a swing rod, but the structure of the motor swing rod is relatively complex, takes up space, and has low compatibility.

Summary of the Invention

[0003] In order to solve the above drawbacks in the prior art, the present invention provides a thread cutting drive mechanism for a cylinder sewing embroidery machine, in which the drive mechanism is simple and compact, the space occupied by the drive mechanism on the needle plate base is reduced, and space saving is realized.

[0004] The technical solution adopted is as follows.

[0005] A thread cutting drive mechanism of a cylinder sewing embroidery machine, comprising a needle plate base attached to a shuttle box and a rotating bobbin disposed within the needle plate base. A fixed blade and a rotatable thread cutting moving blade are disposed on the needle plate base. The thread cutting moving blade is provided with a moving blade wheel rotatably connected to the needle plate base. A drive shaft for driving the moving blade wheel is disposed in the shuttle box, and a drive motor and a transmission structure are connected to the drive shaft.

[0006] Furthermore, the transmission structure is a gear group and / or a transmission pulley assembly disposed between the drive motor and the drive shaft.

[0007] Furthermore, the transmission pulley assembly is a synchronous pulley assembly positioned between the drive motor and the drive shaft.

[0008] Furthermore, the moving blade wheel is fitted with a drive wheel connected to a drive shaft, and the drive wheel is positioned on the needle plate base to cooperate with the moving blade wheel.

[0009] Furthermore, the drive shaft is positioned in the shuttle box to cooperate with the moving blade wheel.

[0010] Furthermore, the gear group is a group of bevel gears positioned between the drive shaft and the drive motor.

[0011] Furthermore, the shuttle box includes a shuttle box body positioned at the rear and an extension positioned at the front end of the shuttle box body. The drive motor is positioned inside or on the side of the shuttle box body, and the needle plate base is positioned on the front end surface of the shuttle box.

[0012] Furthermore, a suitable meshing tooth or transmission belt is provided between the moving blade wheel and the drive wheel.

[0013] Furthermore, the aforementioned thread-cutting movable blade and / or fixed blade are arc-shaped blades provided on the outside of the rotary bobbin.

[0014] Furthermore, the needle plate base is provided with thread dividing pieces for dividing the thread. The thread dividing pieces are arc-shaped thread dividing pieces.

[0015] Compared to conventional technology, the beneficial effects of the present invention are as follows:

[0016] According to the present invention, the needle plate base is provided with a fixed blade and a thread-cutting movable blade equipped with a movable blade wheel rotatably connected to the needle plate base. A drive shaft for driving the movable blade wheel is arranged in the shuttle box, and the drive shaft is linked by a drive motor and a transmission structure, thereby causing the movable blade wheel to rotate, and the thread-cutting movable blade to rotate around the rotary hook in conjunction with it, and to cut the thread in cooperation with the fixed blade.

[0017] By rotating the moving blade wheel via a drive shaft instead of a swing rod, the thread is cut in conjunction with the rotation of the moving blade. This reduces the space occupied by the drive mechanism that drives the entire thread cutting mechanism, resulting in more stable power transmission and increased reliability of thread cutting. The thread cutting structure of the present invention fits perfectly into the elongated structure at the tip of a tubular sewing shuttle box and is particularly suitable for tubular sewing embroidery machines. [Brief explanation of the drawing]

[0018] [Figure 1] This is a plan view of the present invention. [Figure 2] This is a schematic diagram of the overall configuration of the present invention. [Figure 3] This is an enlarged view of area a in Figure 2. [Figure 4] This is a schematic diagram of the internal configuration of the shuttle box of the present invention. [Figure 5] This is a schematic diagram of a part of the present invention. [Figure 6] This is a schematic diagram of the interior of the shuttle box of the present invention, viewed from a different angle. [Figure 7] This is a perspective view showing another embodiment of the drive mechanism of the present invention. [Figure 8] This is a front view showing another embodiment of the drive mechanism of the present invention. [Modes for carrying out the invention]

[0019] The present invention will be described in detail below with reference to specific embodiments.

[0020] Please refer to FIGS. 1 to 6. A thread cutting drive mechanism of a cylinder sewing machine, the thread cutting drive mechanism includes a rotatable thread cutting moving blade 1 and a needle plate base 3 attached to a shuttle box 2. The thread cutting moving blade 1 is provided with a moving blade wheel 4 rotatably connected to the needle plate base 3. In the shuttle box 2, a drive shaft 7 for driving the moving blade wheel 4 is arranged. A drive motor 6 and a transmission structure are connected to the drive shaft 7. By directly driving the moving blade wheel 4 via the drive shaft 7, the thread cutting moving blade 1 rotates in conjunction and can cooperate with a fixed blade to cut the thread. Preferably, the thread cutting moving blade 1 and / or the fixed blade 11 are arc-shaped blades provided outside the rotating bobbin 10. The arc-shaped blade may be arranged to have the same center as the rotating bobbin drive shaft.

[0021] Preferably, the moving blade wheel 4 may be arranged to have the same axis as the rotating bobbin drive shaft. A drive wheel 9 connected to the drive shaft 7 is attached to the moving blade wheel 4, and the drive wheel 9 is arranged on the needle plate base 3 to cooperate with the moving blade wheel 4. A matching meshing tooth or transmission belt is provided between the moving blade wheel 4 and the drive wheel 9. Independent drive motors are respectively connected to the moving blade wheel 4 and the rotating bobbin drive shaft arranged to have the same center.

[0022] The shuttle box 2 includes a shuttle box main body 21 arranged at the rear and an extension part 22 arranged at the front end of the shuttle box main body 21. Considering that the space occupied by the shuttle box main body 21 is large, the drive motor 6 is arranged inside the shuttle box main body 21 or on the side surface of the shuttle box main body 21, and the needle plate base 3 is arranged on the front end face of the shuttle box 2.

[0023] In this embodiment, a meshing tooth is provided at the cooperation part between the moving blade wheel 4 and the drive wheel 9.

[0024] The transmission structure is a gear group and / or a transmission pulley assembly arranged between the drive motor 6 and the drive shaft 7.

[0025] Please refer to Figures 1-6. The transmission structure is a gear group 8 positioned between the drive motor 6 and the drive shaft 7, and the gear group 8 is a bevel gear group positioned between the drive shaft 7 and the drive motor. The drive shaft 7 may be located inside the shuttle box 2. The drive motor 6 is located inside the shuttle box body 21.

[0026] Furthermore, the gear group 8 includes a first bevel gear 801 mounted on the output shaft of the drive motor 6 and a second bevel gear 802 mounted on the drive shaft 7, and the first and second bevel gears cooperate with each other. The first bevel gear 801 can be rotated by the drive of the drive motor 6. Because the first and second bevel gears 802 cooperate with each other, the second bevel gear 802 rotates accordingly, and the drive shaft 7 on the second bevel gear 802 can rotate in conjunction with it. The drive shaft 7 rotates via the meshing tooth moving blade wheel 4 on the drive wheel 9, thereby causing the thread cutting moving blade 1 to rotate in conjunction and cooperate with the fixed blade 11 to cut the thread.

[0027] Please refer to Figures 7-8. The transmission structure is a transmission pulley assembly 5 positioned between the drive motor 6 and the drive shaft 7. Preferably, the transmission pulley assembly 5 is a synchronous pulley assembly positioned between the drive motor 6 and the drive shaft 7. The synchronous pulley assembly can reduce transmission noise. The drive motor 6 is positioned on one side of the shuttle box body 21.

[0028] The needle plate base 3 is provided with a thread dividing piece 12 for dividing the thread. The thread dividing piece 12 is an arc-shaped thread dividing piece.

[0029] The fixed blade is fixed to the needle plate base 3, and the thread-cutting moving blade 1 needs to rotate and cooperate with the fixed blade to complete thread cutting. Also, since the fixed blade is located above the rotary hook 10, thread cutting needs to be completed above the rotary hook 10. The thread-cutting moving blade 1 needs to rotate above the rotary hook and cooperate with the fixed blade, and does not need to rotate a full rotation. Preferably, the outer circumference of the moving blade wheel 4 is provided with meshing teeth that fit into the drive wheel 9.

[0030] A mounting hole for passing the rotary boiler drive shaft is provided in the middle of the needle plate base 3, and the rotary boiler drive mechanism is located inside the shuttle box 2.

[0031] The moving blade wheel 4 is attached to the mounting hole of the needle plate base 3 via a mounting backing plate. The moving blade wheel 4 is also positioned outside the rotary hook drive shaft, and a through hole is provided in the center of the moving blade wheel 4 through which the rotary hook drive shaft can pass. Furthermore, because the moving blade wheel 4 and the rotary hook 10 are mounted coaxially, the space occupied by the needle plate base can be reduced, while the through hole of the moving blade wheel and the rotary hook drive shaft do not come into contact when the moving blade wheel rotates, and therefore do not affect each other.

[0032] Furthermore, the drive shaft 7, drive motor 6, etc., are all located inside the shuttle box. Since most of the drive mechanism is located inside the shuttle box and the thread cutting blade 1 is driven by the drive wheel located on the needle plate base 3, the space occupied by the needle plate base 3 is reduced, resulting in space savings. [Explanation of Symbols]

[0033] 1. Thread cutting blade 2 Shuttle Boxes 3 Needle Plate Base 4 Moving blade wheel 5. Transmission pulley assembly 6. Drive motor 7 Drive shaft 8 Bevel gear group 801 First bevel gear 802 Second bevel gear 9 drive wheels 10 Rotary Kettles 11 Fixed blade 12 thread division pieces 21 Shuttle Box Main Unit 22 Extension

Claims

1. A thread cutting drive mechanism for a cylindrical embroidery machine comprising a needle plate base (3) attached to a shuttle box (2) and a rotary hook (10) disposed within the needle plate base (3), The needle plate base (3) is provided with a fixed blade (11) located on the outside of the rotary hook (10), and a rotatable thread-cutting moving blade (1) that works in cooperation with the fixed blade (11) to cut the thread. The thread cutting movable blade (1) is equipped with a movable blade wheel (4) that is rotatably connected to the needle plate base (3). Inside the shuttle box (2), there is a drive shaft (7) that drives the moving blade wheel (4), a drive motor (6) that rotates the drive shaft (7), and a transmission structure positioned between the drive motor (6) and the drive shaft (7). A drive wheel (9) connected to the drive shaft (7) is attached to the moving blade wheel (4), the drive wheel (9) is positioned on the needle plate base (3) so as to cooperate with the moving blade wheel (4), and a matching meshing tooth is provided between the outer circumference of the moving blade wheel (4) and the drive wheel (9). The moving blade wheel (4) is coaxially mounted in a mounting hole formed in the middle of the needle plate base (3) for passing the rotary boiler drive shaft, such that it has the same axis as the rotary boiler drive shaft that drives the rotary boiler (10), and a through hole is provided in the center of the moving blade wheel (4) through which the rotary boiler drive shaft passes. The thread cutting drive mechanism for a cylindrical embroidery machine is characterized in that the shuttle box (2) includes a shuttle box body (21) positioned at the rear and an extension (22) positioned at the front end of the shuttle box body (21), the needle plate base (3) is positioned on the front end surface of the shuttle box (2), and the drive motor (6) is positioned inside or on the side of the shuttle box body (21).

2. The thread cutting drive mechanism for a cylindrical embroidery machine according to Claim 1, characterized in that the transmission structure is a gear group (8) including a first bevel gear (801) attached to the output shaft of the drive motor (6) and a second bevel gear (802) attached to the drive shaft (7).

3. The thread cutting drive mechanism for a cylindrical embroidery machine according to Claim 1, characterized in that the transmission structure is a transmission pulley assembly (5) including a first pulley attached to the output shaft of the drive motor (6), a second pulley attached to the drive shaft (7), and a belt wrapped between them.

4. The thread cutting drive mechanism for a cylindrical embroidery machine according to Claim 1, characterized in that the inner diameter of the through hole of the moving blade wheel (4) is set to be larger than the outer diameter of the rotary hook drive shaft, and the moving blade wheel (4) is rotatably supported on the needle plate base (3) in a non-contact state with the rotary hook drive shaft.

Images