Thread trimming mechanism of embroidery machine

Abstract

The utility model provides a thread trimming mechanism of an embroidery machine, which is characterized in that a movable knife rest capable of driving a movable knife to rotate around a rotating shuttle so as to be matched with a fixed knife to trim threads is arranged on the periphery of the rotating shuttle, and the movable knife rest is rotatably arranged on the periphery or one side of a driving shaft of the rotating shuttle; the movable knife rest is rotatably arranged on the needle plate seat or the embroidery machine body and at a corresponding position matched with the rotating shuttle; and the fixed cutter is arranged on the needle plate seat or the embroidery machine body at a corresponding position matched with the rotating shuttle. The movable cutter frame rotates to drive the movable cutter to be matched with the fixed cutter to trim threads around the rotating shuttle, so that the occupied volume of the movable cutter can be greatly reduced, and the movable cutter frame rotating around the rotating shuttle avoids a power conversion structure of a transmission plane movable cutter due to the fact that the rotating direction is different from the direction of a driving shaft. A transmission structure can be greatly simplified, the structure can be simplified in the aspects of movement of the driven cutter and driving of the movable cutter, the size is reduced, and therefore the structures of the movable cutter, the needle plate seat and the needle plate are more compact. The installation mode can effectively utilize the space around the rotating shuttle, the use is convenient, the space is saved, and the compatibility is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of embroidery machines, in particular to a thread cutting mechanism of an embroidery machine. Background Art

[0002] Existing embroidery machines usually have a rotating moving knife above the rotary shuttle to cooperate with the fixed knife. Usually, the thread cutting is achieved by cooperating with the fixed knife. The rotating moving knife needs to occupy a large space so that there is enough space for the rotating moving knife to rotate and cooperate with or disengage from the fixed knife. This increases the volume of the needle plate seat. Due to the flat scissors and drive, the lower end surface of the needle plate is flat, which also increases the space occupied by the needle plate.

[0003] In addition, the existing thread trimming drive structure is driven by a motor and a rocker, which is relatively complex and inconvenient to install and disassemble. The thread clip and the flat scissors are set and driven horizontally, resulting in a large space occupied by the needle plate seat at the front end of the shuttle box and the cross section of the front of the shuttle box. Due to the flat scissors and drive, a large plane space needs to be set inside and outside the needle plate seat, which increases the processing cost and also increases the space occupied by the needle plate. Summary of the invention

[0004] In order to solve the defects of the above-mentioned prior art, the utility model provides a thread trimming mechanism for an embroidery machine, in which a movable knife holder is coaxially installed with a rotary shuttle, and the arc surface of the movable knife is parallel to the outer arc surface of the rotary shuttle, so that the space around the rotary shuttle is reasonably utilized and space is saved.

[0005] The technical solutions adopted are as follows:

[0006] A thread trimming mechanism for an embroidery machine, as an improvement, comprises a movable knife arranged on the periphery of a rotary shuttle and a fixed knife which can cooperate with the movable knife to cut the thread, the movable knife is provided with a movable knife holder which can drive the movable knife to rotate around the rotary shuttle and cooperate with the fixed knife to cut the thread, the movable knife holder is rotatably arranged on the periphery or one side of the rotary shuttle driving shaft; the movable knife holder is rotatably installed on a needle plate seat or on an embroidery machine body at a corresponding position which cooperates with the rotary shuttle; the fixed knife is installed on a needle plate seat or on an embroidery machine body at a corresponding position which cooperates with the rotary shuttle.

[0007] As a further improvement, the movable knife holder is provided with a driving structure for driving the movable knife holder to rotate; the movable knife is provided with a wire opening; the bottom of the needle plate on the needle plate seat is provided with an arc that matches the arc-shaped movable knife; the wire dividing piece is set as an arc-shaped wire dividing piece that matches the rotary shuttle.

[0008] As a further improvement, the needle plate seat is installed on the front end surface of the shuttle box of the embroidery machine body; the needle plate seat is also provided with a wire dividing piece, and the wire dividing piece is arranged outside the outer peripheral arc surface of the rotary shuttle.

[0009] As a further improvement, the movable knife holder is installed on the needle plate seat; the needle plate seat is provided with a seat frame extending therefrom, and the fixed knife is arranged on the seat frame.

[0010] As a further improvement, the movable knife and / or the fixed knife is an arc-shaped knife matched with the rotary hook.

[0011] As a further improvement, the movable knife holder is coaxially and concentrically arranged with the rotary hook, and the movable knife holder is provided with a mounting hole for accommodating the rotary hook drive shaft to pass through and to rotate relatively.

[0012] As a further improvement, the arc of the movable knife and / or the fixed knife is concentric with the rotary hook drive shaft.

[0013] As a further improvement, the movable knife holder is provided with a connecting wheel for driving the movable knife holder to rotate.

[0014] As a further improvement, the needle plate seat is provided with a mounting hole for mounting a moving knife holder, the moving knife holder includes a connecting wheel with a connecting handle and a connecting ring groove rotatably arranged in the mounting hole, and the moving knife is arranged on the connecting handle.

[0015] As a further improvement, the connecting wheel is provided with driving teeth.

[0016] Compared with the prior art, the beneficial effects produced by the utility model are:

[0017] A moving knife holder is arranged on the periphery of the rotary shuttle, which can drive the moving knife to rotate around the rotary shuttle and cooperate with the fixed knife to cut the thread. The moving knife holder is rotatably arranged on the periphery or one side of the rotary shuttle drive shaft; the moving knife holder is rotatably installed on the needle plate seat or the embroidery machine body, at a corresponding position to cooperate with the rotary shuttle; the fixed knife is installed on the needle plate seat or the embroidery machine body, at a corresponding position to cooperate with the rotary shuttle. The moving knife holder is driven to rotate around the rotary shuttle to cooperate with the fixed knife to cut the thread, which can greatly reduce the occupied volume of the moving knife. The moving knife holder rotating around the rotary shuttle avoids the power conversion structure of the moving knife on the transmission plane due to the different rotation direction and the driving shaft direction. The transmission structure can be greatly simplified, and then the structure can be simplified and reduced in volume from the movement of the moving knife and the drive of the moving knife. The bottom of the needle plate is set to an arc shape, and the thickness of the needle plate can also be reduced, so that the moving knife, the needle plate seat, and the needle plate structure are more compact.

[0018] The utility model structure can be used for cylinder embroidery machines, cap embroidery machines or ordinary flat embroidery machines. The utility model structure installation method can effectively utilize the space around the rotary shuttle, is easy to use, saves space, reduces the size of the needle plate seat, and has stronger compatibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2It is a partial structural schematic diagram of the utility model;

[0021] Figure 3 It is a top view of the utility model;

[0022] Figure 4 for Figure 2 A magnified image of point a;

[0023] Figure 5 for Figure 3 The enlarged view of point b;

[0024] Figure 6 This is a schematic diagram of the drive structure of the utility model;

[0025] Figure 7 This is a bottom view of the utility model;

[0026] Figure 8 for Figure 7 The enlarged view of point c;

[0027] Figure 9-10 The utility model is a structural schematic diagram of a thread trimming mechanism applied to flat embroidery.

[0028] Fig.11 yes Fig. 9 Enlarged schematic diagram at point d.

[0029] Fig.12 yes Fig.10 An enlarged schematic diagram of point e.

[0030] Fig.13 The utility model is a structural schematic diagram of a thread trimming mechanism applied to cap embroidery.

[0031] Fig.14 picture Fig.13 Enlarged schematic diagram of point f.

[0032] Among them, there are rotary hook 1, movable knife 2, movable knife holder 3, connecting handle 31, connecting wheel 32, connecting ring groove 33, fixed knife 4, needle plate seat 5, seat frame 6, driving structure 7, first transmission wheel 701, transmission shaft 702, second gear structure 703, driving motor 704, shuttle box 8, dividing plate 9, and rotary hook driving shaft 10. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with specific embodiments.

[0034] A thread trimming mechanism for an embroidery machine comprises a movable knife 2 arranged on the periphery of a rotary shuttle 1 and a fixed knife 4 which can cooperate with the movable knife to trim the thread. The movable knife 2 is provided with a movable knife holder 3 which can drive the movable knife 2 to rotate around the rotary shuttle and cooperate with the fixed knife 4 to trim the thread. The movable knife holder 3 can be rotatably arranged on the periphery or one side of a rotary shuttle drive shaft 10; that is, the movable knife holder 3 can be arranged on any side of the drive shaft 10 through a rotating shaft to facilitate the position of thread trimming; or a through hole is arranged on the movable knife holder 3 to facilitate the rotary shuttle drive shaft 10 to pass through, so that the movable knife holder 3 can be rotatably arranged on the periphery of the rotary shuttle drive shaft 10. Specifically, the movable knife holder 3 can be rotatably installed on a needle plate seat 5 or on an embroidery machine body, at a corresponding position to the rotary shuttle; the fixed knife 4 is installed on the needle plate seat 5 or on an embroidery machine body, at a corresponding position to the rotary shuttle. The movable knife holder 3 can be installed on the needle plate seat 5 or the corresponding position of the embroidery machine body according to the actual situation of the corresponding embroidery machine. For example, the movable knife holder 3 can be installed on the shuttle box 8 of the embroidery machine body and located at the matching position with the rotary shuttle 1.

[0035] The needle plate seat 5 is installed on the front end surface of the shuttle box 8 of the embroidery machine body; the needle plate seat 5 is also provided with a wire dividing piece 9, and the wire dividing piece 9 is arranged outside the outer arc surface of the rotary shuttle 1. The wire dividing piece 9 is used for dividing the thread when cutting the thread. Since it cooperates with the rotating movable knife 2, the wire dividing piece 9 can also be designed as an arc-shaped wire dividing piece that cooperates with the rotary shuttle 1, thereby saving space.

[0036] The movable knife 2 is provided with a guide wire opening; the bottom of the needle plate on the needle plate seat 5 is provided with an arc that matches the arc movable knife 2. Usually, the top of the needle plate of cap embroidery or tube embroidery is arc-shaped. Setting the bottom of the needle plate to an arc shape can reduce the thickness of the needle plate, so that the fixed knife 4, the movable knife holder 3 and the movable knife 2 are installed upwardly offset, which can save the height dimension of the needle plate seat 5 and make the needle plate seat more compact.

[0037] See also Figure 1-12 In this embodiment, the movable knife holder 3 is installed on the needle plate seat 5; the needle plate seat 5 is provided with a seat frame 6 extending therefrom, the fixed knife 4 is arranged on the seat frame 6, and the needle plate seat 5 is installed on the shuttle box of the embroidery machine body at a corresponding position cooperating with the rotary shuttle.

[0038] The shape of the movable knife 2 or / and the fixed knife can be determined according to the needs of thread cutting and the convenience of driving the thread cutting, and the shape is based on the convenience of thread cutting. In this embodiment, as a preference, the movable knife 2 or / and the fixed knife is an arc-shaped knife that cooperates with the rotary shuttle. The arc-shaped knife can reduce the occupied volume of the movable knife and the fixed knife as much as possible, which is beneficial for the movable knife 2 to move in a small space and cooperate with the fixed knife 4 to cut the thread. At the same time, as a preference, the movable knife holder 3 is coaxially and concentrically arranged with the rotary shuttle drive shaft, and the movable knife holder 3 is provided with a mounting hole that accommodates the rotary shuttle drive shaft 10 to pass through and can rotate relatively, and the mounting hole is the above-mentioned through hole. As a further preference, the movable knife 2 or the arc of the movable knife 2 and the fixed knife is concentric with the rotary shuttle drive shaft. The above-mentioned concentric arrangement can facilitate installation and can also be beneficial to improving the accuracy of the movable knife 2.

[0039] Of course, the movable knife 2 and / or the fixed knife 4 of the arc knife can be selected to be concentric with the rotary hook drive shaft 10 according to actual needs, and the movable knife holder 3 can also be set not coaxially with the rotary hook according to actual needs, and the rotating axis of the movable knife holder 3 is set on one side of the rotary hook drive shaft 10.

[0040] The movable knife holder 3 is provided with a connecting wheel 32 for driving the movable knife holder 3 to rotate. The connecting wheel 32 is provided with driving teeth.

[0041] The needle plate seat 5 is provided with a mounting hole for mounting the movable knife holder 3. The movable knife holder 3 includes a connecting wheel 32 provided with a connecting handle 31 and a connecting ring groove 33 rotatably arranged in the mounting hole. The movable knife 2 is arranged on the connecting handle 31. The movable knife 2 can be directly limited in the mounting hole of the needle plate seat 5 by the connecting ring groove and rotatably connected with the needle plate seat 5. Of course, the movable knife 2 can also be connected with the mounting hole of the needle plate seat 5 through a bearing.

[0042] The movable knife holder 3 is provided with a driving structure 7 for driving the movable knife holder 3 to rotate. The driving structure 7 includes a first transmission wheel 701 matched with the driving teeth of the connecting wheel 32, a second gear structure 703 connected to the first transmission wheel 701 through a transmission shaft 702, and a driving motor 704 is provided on the second gear structure 703. The driving motor 704 drives the second gear structure 703, and the second gear structure 703 drives the first transmission wheel 701 through the transmission shaft 702. The first transmission wheel 701 drives the movable knife holder 3 to rotate and cut the thread by matching the driving teeth on the connecting wheel 32 through meshing teeth.

[0043] Of course, the first transmission wheel 701 and the connecting wheel 32 can also be driven by a belt. In this embodiment, the connecting wheel 32 is preferably driven by a gear. The second gear structure 703 can be a bevel gear set.

[0044] See also Figure 1-8The movable knife holder 3, movable knife 2, fixed knife 4, and thread dividing sheet 9 of the thread trimming mechanism of the utility model are installed in the needle plate seat 5, and are installed on the front end surface of the shuttle box of the cylinder embroidery machine through the needle plate seat 5. The movable knife holder 3 is driven by the driving motor 704 to drive the movable knife 2 to cut the thread. The thread trimming mechanism of the cylinder embroidery machine of the utility model, the front section of the shuttle box can be reduced from the existing 48mm wide * 49mm high to 44mm wide * 40mm high. After being reduced, it can be used to embroider socks and shoe uppers.

[0045] Figure 9-12 The thread trimming mechanism of the utility model can be installed on a flat embroidery machine, which is provided with a plurality of shuttle boxes. The movable knife frame 3, movable knife 2, fixed knife 4 and wire dividing sheet 9 of the thread trimming mechanism are installed in the needle plate seat 5, and are installed on the front end surface of the shuttle box of the flat embroidery machine through the needle plate seat 5. The driving motor 704 drives the movable knife frame 3 of the thread trimming mechanism on each shuttle box through a driving shaft and a bevel gear set.

[0046] Figure 13-14 The thread trimming mechanism of the utility model can be installed on a cap embroidery machine, which is provided with a plurality of shuttle boxes. The movable knife frame 3, movable knife 2, fixed knife 4, and wire dividing sheet 9 of the thread trimming mechanism are installed in a needle plate seat 5, and are installed on the front end surface of the shuttle box of the cap embroidery machine through the needle plate seat 5. The driving motor 704 drives the movable knife frame 3 of the thread trimming mechanism on each shuttle box through a driving shaft and a bevel gear set.

[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An embroidery machine thread trimming mechanism, characterized in that: The invention comprises a movable knife (2) arranged on the periphery of a rotary shuttle (1) and a fixed knife (4) which can cooperate with the movable knife to cut the thread. The movable knife (2) is provided with a movable knife holder (3) which can drive the movable knife (2) to rotate around the rotary shuttle and cooperate with the fixed knife (4) to cut the thread. The movable knife holder (3) can be rotatably arranged on the periphery or one side of a rotary shuttle drive shaft (10); the movable knife holder (3) can be rotatably installed on a needle plate seat (5) or on an embroidery machine body, at a position corresponding to the rotary shuttle; the fixed knife (4) is installed on the needle plate seat (5) or on the embroidery machine body, at a position corresponding to the rotary shuttle.

2. The thread trimming mechanism for an embroidery machine according to claim 1, characterized in that: The movable knife holder (3) is provided with a driving structure for driving the movable knife holder (3) to rotate; and the movable knife (2) is provided with a wire guide opening.

3. The thread trimming mechanism for an embroidery machine according to claim 1, characterized in that: The needle plate seat (5) is mounted on the front end surface of the shuttle box (8) of the embroidery machine body; the needle plate seat (5) is also provided with a wire dividing piece (9), and the wire dividing piece (9) is arranged outside the arc surface of the outer periphery of the rotary shuttle; the wire dividing piece (9) is arranged as an arc-shaped wire dividing piece that cooperates with the rotary shuttle.

4. The thread trimming mechanism for an embroidery machine according to claim 1 or 3, characterized in that: The movable knife holder (3) is mounted on a needle plate seat (5); a seat frame (6) is extended from the needle plate seat (5), and the fixed knife (4) is arranged on the seat frame (6).

5. The thread trimming mechanism for an embroidery machine according to claim 1, characterized in that: The movable knife (2) and / or the fixed knife are arc-shaped knives that match the rotary shuttle; the bottom of the needle plate on the needle plate seat (5) is provided with an arc that matches the arc-shaped movable knife (2).

6. The thread trimming mechanism for an embroidery machine according to claim 1, characterized in that: The movable knife holder (3) is coaxially and concentrically arranged with the rotary hook, and a mounting hole is provided on the movable knife holder (3) for accommodating the rotary hook drive shaft to pass through and to be relatively rotatable.

7. The thread trimming mechanism for an embroidery machine according to claim 5, characterized in that: The arc shape of the movable knife (2) and / or the fixed knife is concentric with the rotary hook drive shaft.

8. The thread trimming mechanism for an embroidery machine according to claim 1, characterized in that: The movable blade holder (3) is provided with a connecting wheel (32) for driving the movable blade holder (3) to rotate.

9. The thread trimming mechanism for an embroidery machine according to claim 4, characterized in that: The needle plate seat (5) is provided with a mounting hole for mounting a movable knife holder (3). The movable knife holder (3) comprises a connecting wheel (32) provided with a connecting handle (31) and a connecting ring groove (33) rotatably arranged in the mounting hole. The movable knife (2) is arranged on the connecting handle.

10. The thread trimming mechanism for an embroidery machine according to claim 8, characterized in that: The connecting wheel (32) is provided with driving teeth.

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