Wire breaking structure of flatcar machine

Abstract

The utility model discloses a thread breaking structure of a flat machine, which comprises an operation bedplate, a machine head and a needle plate, the operation bedplate is provided with the machine head and the needle plate, the needle plate is welded with a bearing frame, a movable rod is arranged on the surface of the bearing frame in a penetrating manner, one end of the movable rod is detachably provided with a cutter, and the cutter is provided with a thread breaking mechanism. A mounting block is mounted at the other end of the movable rod, a connecting block is mounted on the mounting block, a spring sleeves the position, located on the outer side of the movable rod, between the mounting block and the bearing frame, an electromagnet is mounted on the surface of one side of the bearing frame and used in cooperation with the connecting block, and lifting plates are symmetrically mounted on the needle plate through a second lead screw module. According to the wire cutting device, the two knife grinders are arranged, and the two knife grinders move to grind the cutting edge of the cutter, so that the cutter can be always kept in a sharp state, the wire cutting effect and efficiency are ensured, and the problem that the wire is difficult to cut off by a rough and blunt cutter is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of the automatic thread breaking structure of a flatbed sewing machine, in particular to a thread breaking structure of a flatbed sewing machine. Background Art

[0002] A flatbed sewing machine, also called a flat seam machine, is a machine that uses a single sewing thread to form a stitch on the sewing material, so as to interweave or sew together one or more layers of sewing materials. The flat seam machine is the most basic type of vehicle in sewing equipment. In sewing, it has the simplest stitch. The stitched stitch is neat, beautiful, the stitch is uniform, flat and firm, the sewing speed is fast, the operation is simple, and it is easy to understand. The existing thread cutting device of a flatbed sewing machine usually consists of an arc-shaped movable knife and a fixed knife. They rub and squeeze each other, and the edges of the blades touch each other, so as to realize the function of cutting the thread. When such a thread cutting device is used, the blades are easily severely worn, which affects the thread cutting function.

[0003] The existing technology has the following problems:

[0004] After a large number of searches, it is found that the Chinese Patent Publication No.: CN220300994U discloses an automatic thread breaking structure of a flatbed sewing machine, which includes an operating table board with a machine head. A needle board matching with the machine head is arranged on the operating table board. A fixing board is fixedly connected to the needle board. A movable rod is movably penetrated through the fixing board. One end of the movable rod is connected with a cutter assembly. A driving mechanism for driving the movable rod to make the cutter assembly cut the thread is arranged on the fixing board. The cutter assembly includes a connecting sleeve and a cutter. One end of the movable rod is detachably connected to the connecting sleeve. The bottom of the connecting sleeve is connected with a cutter through a connecting plate. The cutter is an electric control hot melting thread cutting knife. The connecting sleeve is sleeved on one end of the movable rod. The connecting sleeve and the movable rod are fastened by a fastening bolt screwed on the connecting sleeve. By setting the driving mechanism, the movement of the cutter assembly can be driven to cut the thread, and the cutting assembly includes an electric control hot thread cutting knife to ensure stable cutting of the thread.

[0005] However, the above patent still has problems in the actual use process. Obviously, the thread cutting knife is easily made blunt after being used many times, resulting in the problem of affecting the cutting effect and efficiency of the thread.

[0006] Therefore, we propose a thread breaking structure of a flatbed sewing machine to solve the above disadvantages. Content of the Utility Model

[0007] The purpose of the utility model is to provide a thread breaking structure of a flatbed sewing machine to solve the shortcomings existing in the prior art.

[0008] To achieve the above object, the present utility model adopts the following technical solution: A thread breaking structure of a flatbed machine, including an operation table board, a machine head and a needle board. The operation table board is provided with a machine head and a needle board. A bearing frame is welded on the needle board, and a movable rod is penetratively arranged on the surface of the bearing frame. One end of the movable rod is detachably installed with a cutter, and the other end of the movable rod is installed with a mounting block. A connecting block is installed on the mounting block. A spring is sleeved outside the movable rod between the mounting block and the bearing frame. An electromagnet is installed on one side surface of the bearing frame, and the electromagnet is used in cooperation with the connecting block. The needle board is symmetrically provided with lifting plates through a second lead screw module, and the two lifting plates are located on the upper and lower sides of the movable rod. A grinding stone is installed on the opposite surfaces of the two lifting plates through a first lead screw module.

[0009] Preferably, the length of the first lead screw module is greater than the length of the cutter, and the width of the cutter is less than the length of the grinding stone.

[0010] Preferably, the electromagnet is electrically connected to a controller installed on the machine head through a wire.

[0011] Preferably, the first lead screw module and the second lead screw module have the same structure.

[0012] Preferably, the diameter of the spring is greater than the diameter of the movable rod, and the movable rod is made of a hollow aluminum alloy tube.

[0013] Preferably, the spring is a non-magnetic spring.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] 1. In the present utility model, by arranging two grinding stones, the two grinding stones can move to grind the cutting edge of the cutter, so that the cutter can always maintain a sharp state, ensuring the cutting effect and efficiency of the thread, and avoiding the problem that a blunt cutter is difficult to cut the thread. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of a thread breaking structure of a flatbed machine proposed by the present utility model;

[0018] Figure 2 It is a top view of the needle board;

[0019] Figure 3 Side view of the needle plate;

[0020] Figure 4 is Figure 2 Enlarged schematic diagram of A in

[0021] Legend description:

[0022] 1. Operating table board; 2. Machine head; 3. Needle plate; 4. Carrier; 5. Electromagnet; 6. Mounting block; 7. Connecting block; 8. Spring; 9. Movable rod; 10. Cutter; 11. Lifting plate; 12. First lead screw module; 13. Grinding stone; 14. Second lead screw module. Specific implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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 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.

[0024] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] Please refer to Figures 1-4, A thread-breaking structure of a flatbed machine, comprising an operating table board 1, a machine head 2 and a needle board 3. The operating table board 1 is provided with the machine head 2 and the needle board 3. A bearing frame 4 is welded on the needle board 3. An activity rod 9 is penetratingly arranged on the surface of the bearing frame 4. One end of the activity rod 9 is detachably installed with a cutter 10. The other end of the activity rod 9 is installed with a mounting block 6. A connecting block 7 is installed on the mounting block 6. A spring 8 is sleeved outside the activity rod 9 between the mounting block 6 and the bearing frame 4. An electromagnet 5 is installed on one side surface of the bearing frame 4. The electromagnet 5 is used in cooperation with the connecting block 7. The needle board 3 is symmetrically installed with lifting plates 11 through a second lead screw module 14. The two lifting plates 11 are located on the upper and lower sides of the activity rod 9. A grinding stone 13 is installed on the opposite surfaces of the two lifting plates 11 through a first lead screw module 12. When in use, driven by the electromagnet 5 and the connecting block 7, the cutter 10 can move towards the direction of the thread so as to cut the thread. The cutter 10 is an electric control hot-melt thread cutter, which can ensure that when the cutter 10 contacts the thread, the thread is firmly cut. By arranging two grinding stones 13, the two grinding stones 13 can approach each other and fit with the two side surfaces of the cutter 10 under the drive of the second lead screw module 14 after the cutter 10 resets. Then, the first lead screw module 12 drives the two grinding stones 13 to move to grind the blade of the cutter 10, so that the cutter 10 can always maintain a sharp state, ensuring the cutting effect and efficiency of the thread, and avoiding the problem that a thick and blunt cutter 10 is difficult to cut the thread.

[0026] In this implementation scheme: The length of the first lead screw module 12 is greater than the length of the cutter 10, and the width of the cutter 10 is less than the length of the grinding stone 13.

[0027] Specifically, it ensures the grinding effect and efficiency of the cutter 10, avoids the occurrence of grinding dead corners, and ensures that the cutter 10 is always in a sharp state.

[0028] In this implementation scheme: The electromagnet 5 is electrically connected to a controller installed on the machine head 2 through a wire.

[0029] Specifically, it is a common circuit connection structure and will not be elaborated here too much.

[0030] In this implementation scheme: The first lead screw module 12 and the second lead screw module 14 have the same structure.

[0031] Specifically, its structure is shown in the appendix Figure 2 , 3 and 4. The first lead screw module 12 and the second lead screw module 14 adopt common lead screw modules on the market, and their working principles are well-known and will not be elaborated here too much.

[0032] In this implementation scheme: The diameter of the spring 8 is greater than the diameter of the activity rod 9, and the activity rod 9 is made of a hollow aluminum alloy tube.

[0033] Specifically, while ensuring its own structural strength, its own weight is reduced.

[0034] In this embodiment: The spring 8 is a non-magnetic spring 8.

[0035] Specifically, when the electromagnet 5 is powered off, the movable rod 9 can drive the cutter 10 to reset under the restoring force of the spring 8.

[0036] In this embodiment: The controller is of an existing structure, and the control circuit can be realized by simple programming of those skilled in the art, which belongs to the common general knowledge in this field. Only its use is involved without modification, so the control method and circuit connection will not be described in detail.

[0037] Working principle: During use, driven by the electromagnet 5 and the connecting block 7, the cutter 10 can move towards the wire to cut the wire. The cutter 10 is an electric control hot-melt wire cutting tool, which can ensure that when the cutter 10 contacts the wire, the wire is firmly cut. By arranging two grindstones 13, the two grindstones 13 can approach each other and fit against the two side surfaces of the cutter 10 under the drive of the second lead screw module 14 after the cutter 10 resets. Then, the first lead screw module 12 drives the two grindstones 13 to move to grind the cutting edge of the cutter 10, so that the cutter 10 can always maintain a sharp state, ensuring the cutting effect and efficiency of the wire, and avoiding the problem that a blunt cutter 10 is difficult to cut the wire.

[0038] It should be noted that: The model specifications of the electromagnet 5 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0039] The power supply and principle of the electromagnet 5 are clear to those skilled in the art and will not be described in detail here.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A wire breaking structure for a flat lathe, comprising an operating table (1), a machine head (2) and a needle plate (3), characterized in that: The operating table (1) is provided with a machine head (2) and a needle plate (3), a carrier frame (4) is welded on the needle plate (3), and a movable rod (9) is provided through the surface of the carrier frame (4), and a cutter (10) is detachably provided on one end of the movable rod (9), a mounting block (6) is provided on the other end of the movable rod (9), and a connecting block (7) is provided on the mounting block (6), a spring (8) is sleeved on the outer side of the movable rod (9) between the mounting block (6) and the carrier frame (4), an electromagnet (5) is provided on the surface of one side of the carrier frame (4), and the electromagnet (5) is used in conjunction with the connecting block (7), a lifting plate (11) is symmetrically provided on the needle plate (3) through a second screw module (14), and the two lifting plates (11) are located on the upper and lower sides of the movable rod (9), and a whetstone (13) is provided on the opposite sides of the two lifting plates (11) through a first screw module (12).

2. A wire breaking structure for a flat lathe according to claim 1, characterized in that: The length of the first screw module (12) is greater than the length of the cutter (10), and the width of the cutter (10) is less than the length of the grindstone (13).

3. The wire breaking structure of a flat lathe according to claim 1, characterized in that: The electromagnet (5) is electrically connected to a controller installed on the machine head (2) via a wire.

4. The wire breaking structure of a flat lathe according to claim 1, characterized in that: The first screw module (12) and the second screw module (14) have the same structure.

5. The wire breaking structure of a flat lathe according to claim 1, characterized in that: The diameter of the spring (8) is greater than the diameter of the movable rod (9), and the movable rod (9) is made of a hollow aluminum alloy tube.

6. The wire breaking structure of a flat lathe according to claim 1, characterized in that: The spring (8) is a non-magnetic spring (8).

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