Thread trimming structure with thread clamping function
By designing a thread-cutting structure with a thread-clamping function, the problem of excessively long or short thread ends in sewing processing is solved, realizing automated thread length adjustment and stable cutting, thus improving the efficiency and quality of sewing equipment.
Patent Information
- Application Number
- CN202520275665.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-20
AI Technical Summary
In sewing, if the thread end left at the back of the needle is too long, it needs to be trimmed manually. If it is too short, it cannot form a loop, resulting in the inability to thread.
A wire-cutting structure with a wire-clamping function has been designed, including a housing, a fixed blade, a moving blade, a wire clamping plate, a wire suction tube, and a wire-cutting motor. Through the coordinated action of mechanical and negative pressure sources, the wire length is automatically adjusted and the wire-cutting operation is completed.
It enables automatic adjustment and stable cutting of the starting thread, reduces manual trimming, avoids thread loop formation, and improves sewing efficiency and quality.
Smart Images
Figure CN223780535U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of sewing equipment, in particular to a thread clamping and cutting structure. BACKGROUND
[0002] Sewing equipment is a mechanical device used for sewing materials such as cloth and leather, and is widely used in the fields of garment manufacturing, home textile, hat and shoe production, and automobile interior decoration. With the development of technology, sewing equipment has evolved from traditional manual machines to modern devices with high automation and intelligence. The thread cutting structure is a common functional module in modern sewing equipment and is widely used in various types of sewing equipment to improve efficiency, reduce manual operation and improve sewing quality.
[0003] In sewing processing, if the thread left at the rear end of the needle after cutting is too long, the thread left on the sewing material at the beginning of sewing will be too long and need to be manually trimmed again. If the thread left at the rear end of the needle after cutting is too short, it will be difficult to form a thread loop during the initial sewing stage, resulting in the inability to thread the needle. CONTENT OF THE UTILITY MODEL
[0004] The application provides a thread clamping and cutting structure to solve the technical problem that the inventor realizes that in sewing processing, if the thread left at the rear end of the needle after cutting is too long, the thread left on the sewing material at the beginning of sewing will be too long and need to be manually trimmed again. If the thread left at the rear end of the needle after cutting is too short, it will be difficult to form a thread loop during the initial sewing stage, resulting in the inability to thread the needle.
[0005] The application provides a thread clamping and cutting structure, which comprises a housing, an operation cavity is formed in the interior of the housing, a fixed knife is detachably connected to the surface of the housing above the operation cavity, a thread clamping plate is arranged on the top of the fixed knife, a thread cutting motor is arranged on the housing, a connecting assembly and a moving knife are further included, the moving knife and the thread cutting motor are connected through the connecting assembly, a thread passing hole is formed in the interior of the moving knife, the moving knife and the thread clamping plate both have thread clamping surfaces, the thread clamping surface of the moving knife abuts against the thread clamping surface of the thread clamping plate, and the surface of the moving knife abuts against the surface of the fixed knife.
[0006] In any of the above technical solutions, further, the connecting assembly comprises a thread cutting crank, a thread cutting connecting rod and a moving knife holder, one end of the thread cutting crank is arranged on the output end of the thread cutting motor, the moving knife holder is movably connected to the inner wall of the operation cavity, the other end of the thread cutting crank and the surface of the moving knife holder are respectively hinged to the two ends of the thread cutting connecting rod, and the moving knife is detachably connected to the surface of the moving knife holder.
[0007] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0008] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0009] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0010] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0011] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0012] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0013] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0014] In any of the above technical solutions, further comprising a base and a pressing plate, the base is detachably connected to the inner wall of the operation cavity, the pressing plate is detachably connected to the surface of the base, the base and the pressing plate limit a groove, and the movable cutter holder is sleeved on the surface of the groove.
[0015] The beneficial effects of the present application mainly include:
[0016] Before sewing starts, the thread passing hole on the movable cutter is directly below the needle, the needle passes through the thread passing hole of the movable cutter, at this time the movable cutter is not moved, the needle is raised, when the needle leaves the needle plate, the thread cutting motor is started to drive the thread cutting blade on the movable cutter to rotate towards the thread cutting blade on the fixed cutter, when the thread lifting lever reaches the highest point, the thread clamping surface on the movable cutter and the thread clamping surface on the thread clamping plate are engaged, at the same time the thread cutting motor stops working, the suction tube starts to suck air, when the second needle thread lifting lever reaches the highest point, the thread cutting motor drives the thread cutting blade on the movable cutter to the other side of the thread cutting blade on the fixed cutter to complete thread cutting.
[0017] It should be understood that both the foregoing general description and the following detailed description are intended for purposes of illustration and description only and are not intended to limit the application. The accompanying drawings are incorporated in and constitute a part of the specification. Furthermore, the description and drawings are to be construed together with the appended claims to explain the principles of the application. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the specific embodiments or prior art of the present application, the drawings needed to be used in the description of the specific embodiments or prior art will be briefly introduced. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0019] Figure 1 The structure diagram of the cutting line structure of the embodiment of the present application is shown in the figure.
[0020] Figure 2 The structure diagram of the cutting line structure of the embodiment of the present application is shown in the figure. Figure 1 ;
[0021] Figure 3 The structure diagram of the cutting line structure of the embodiment of the present application is shown in the figure. Figure 2 ;
[0022] Figure 4 The structure diagram of the cutting line structure of the embodiment of the present application is shown in the figure.
[0023] Figure 5 The structure diagram of the cutting line structure of the embodiment of the present application is shown in the figure.
[0024] Figure 6 The structure diagram of the cutting line structure of the embodiment of the present application is shown in the figure.
[0025] Figure 7 The structure diagram of the cutting line structure of the embodiment of the present application is shown in the figure.
[0026] Figure:
[0027] 100 - housing; 101 - operation cavity; 102 - fixed knife; 103 - wire clamping plate; 104 - cutting line motor; 105 - moving knife; 106 - wire passing hole; 107 - wire clamping surface; 108 - wire suction pipe; 109 - cutting line crank; 110 - cutting line connecting rod; 111 - moving knife holder; 112 - base; 113 - pressing plate; 114 - wire cutting edge; 115 - positioning pad plate; 116 - positioning hook. DETAILED DESCRIPTION
[0028] The technical solutions of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments.
[0029] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like 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 device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0032] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 And Figure 7 , in one or more embodiments, a line clamping and cutting structure is provided, comprising a shell 100, an operating cavity 101 is formed in the inside of the shell 100, a fixed knife 102 is detachably connected to the surface of the shell 100 and above the operating cavity 101, a line clamping plate 103 is arranged on the top of the fixed knife 102, a line cutting motor 104 is arranged on the shell 100, further comprising a connecting assembly and a moving knife 105, the moving knife 105 and the line cutting motor 104 are connected through the connecting assembly, a wire passing hole 106 is formed in the inside of the moving knife 105, the moving knife 105 and the line clamping plate 103 both have a line clamping surface 107, the line clamping surface 107 of the moving knife 105 abuts against the line clamping surface 107 of the line clamping plate 103, and the surface of the moving knife 105 abuts against the surface of the fixed knife 102; further comprising a line suction pipe 108, one end of the line suction pipe 108 is aligned with the line clamping surface 107 of the line clamping plate 103, the moving knife 105 and the connecting assembly are both located in the operating cavity 101, the surface of the wire passing hole 106 has a wire cutting edge 114, the surface of the fixed knife 102 has a wire cutting edge 114, and the wire cutting edge 114 on the moving knife 105 has a gap from the wire cutting edge 114 on the fixed knife 102, and the other end of the line suction pipe 108 is provided with a negative pressure source.
[0033] In the embodiment, the thread passing hole on the moving knife 105 is opposite to the needle before the sewing starts, the needle passes through the thread passing hole 106 of the moving knife 105, at this time the moving knife 105 is not moved, the needle is raised, when the needle leaves the needle plate, the thread cutting motor 104 is started to move the moving knife 105 to the fixed knife 102 through the connecting assembly, when the thread tension lever reaches the highest point, the thread clamping surface 107 on the moving knife 105 and the thread clamping surface 107 on the thread clamping plate 103 are engaged, at the same time the thread cutting motor 104 stops working, the suction pipe 108 is started to suck air, when the second needle thread tension lever reaches the highest point, the thread cutting motor 104 completes the thread cutting through the thread cutting blade 114 on the moving knife 105 to the other side of the thread cutting blade 114 on the fixed knife 102 through the connecting assembly; the negative pressure source connected with the suction pipe 108 adopts the existing technology, adopts the air pressure mode, and the air pressure of the suction pipe 108 is used to ensure the stability of the sewing thread to prevent misplacement.
[0034] Please refer to Figure 1 , Figure 2 and Figure 3 , in some embodiments, the connecting assembly includes a thread cutting crank 109, a thread cutting connecting rod 110 and a moving knife holder 111, one end of the thread cutting crank 109 is arranged at the output end of the thread cutting motor 104, the moving knife holder 111 is movably connected to the inner wall of the operation cavity 101, the other end of the thread cutting crank 109 and the surface of the moving knife holder 111 are respectively hinged to the two ends of the thread cutting connecting rod 110, and the moving knife 105 is detachably connected to the surface of the moving knife holder 111.
[0035] In the embodiment, when the thread cutting motor 104 is started, the thread cutting connecting rod 110 is driven to occur angular deflection by the thread cutting crank 109, the displacement of the thread cutting connecting rod 110 pulls the moving knife holder 111 to occur angular deflection, the moving knife 105 rotates with the moving knife holder 111, so that the thread cutting blade 114 on the moving knife 105 rotates to the direction of the thread cutting blade 114 on the fixed knife 102, thereby completing the thread cutting action.
[0036] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , in some embodiments, the base 112 and the pressing plate 113 are further included, the base 112 is detachably connected to the inner wall of the operation cavity 101, the pressing plate 113 is detachably connected to the surface of the base 112, the base 112 and the pressing plate 113 limit a recess, and the moving knife holder 111 is sleeved on the surface of the recess.
[0037] In this embodiment, the base 112 is detachably connected to the operating cavity 101. Then, the movable tool holder 111 is sleeved on the surface of the base 112, and then the pressure plate 113 is attached to the base 112 for connection. The movable tool holder 111 is located in the groove restricted by the base 112 and the pressure plate 113. The pressure plate 113 is provided to prevent the movable tool holder 111 from being misaligned during rotation, that is, to ensure that the position of the movable tool holder 111 is stable and can only be deflected at an angle.
[0038] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments, a positioning pad 115 is also included, which is located between the fixed blade 102 and the housing 100. A positioning hook 116 is detachably connected to the top of the housing 100, and a suction tube 108 is located above the positioning hook 116. The fixed blade 102 pad is made of any one of rubber, latex, and silicone. The moving blade 105 is detachably connected to the surface of the moving blade holder 111 by bolts, screws, threaded pins, or quick-release pins. The fixed blade 102 is detachably connected to the surface of the housing 100 by bolts, screws, threaded pins, or quick-release pins.
[0039] In this embodiment, the positioning pad 115 effectively improves the stability of the fixed blade 102 and reduces the probability of misalignment of the fixed blade 102 due to vibration; the positioning hook 116 supports the suction tube 108 to ensure the stability of the suction tube 108; the material selection of the fixed blade 102 pad includes, but is not limited to, the materials mentioned above, and the connection between the moving blade 105 and the moving blade holder 111, and the connection between the fixed blade 102 and the housing 100 include, but are not limited to, the structures mentioned above.
[0040] Specifically, the working principle of the wire-cutting structure with wire-clamping function provided in this application is as follows:
[0041] Before sewing begins, the thread guide on the moving blade 105 is aligned with the bottom of the needle. The needle descends and passes through the thread guide hole 106 of the moving blade 105. At this time, the moving blade 105 remains stationary, and the needle rises. When the needle leaves the needle plate, the thread cutting motor 104 is activated, which drives the thread cutting connecting rod 110 to deflect at an angle via the thread cutting crank 109. The displacement of the thread cutting connecting rod 110 will pull the moving blade holder 111 to deflect at an angle. When the thread take-up lever reaches its highest point, the thread clamping surface 107 on the moving blade 105 engages with the thread clamping surface 107 on the thread clamping plate 103. At the same time, the thread cutting motor 104 stops working, and the suction tube 108 starts suction. When the second needle take-up lever reaches its highest point, the thread cutting motor 104 cuts the thread through the cutting edge 114 on the moving blade 105 of the connecting assembly to the other side of the cutting edge 114 on the fixed blade 102.
[0042] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A thread cutting structure with a thread clamping function, characterized in that, The utility model provides a cutting thread device, including the casing, the inside of casing is opened with operation cavity, the surface of casing and the above of operation cavity can detachably connect with fixed knife, the top of fixed knife is provided with the line clamping plate, be provided with the cutting thread motor on the casing still, including connecting assembly and moving knife, moving knife and cutting thread motor are connected through connecting assembly, the inside of moving knife is opened with the wire passing hole, moving knife and line clamping plate all have the line clamping face, the line clamping face of moving knife and the line clamping face of line clamping plate are abutted, the surface of moving knife and the surface of fixed knife are mutually abutted, still including the line suction pipe, one end of line suction pipe is aligned the line clamping face of line clamping plate, moving knife and connecting assembly all are located in operation cavity.
2. The thread cutting and shearing structure according to claim 1, wherein The connecting assembly includes a thread cutting crank, a thread cutting connecting rod, and a moving knife holder. One end of the thread cutting crank is arranged on the output end of the thread cutting motor. The moving knife holder is movably connected to the inner wall of the operation cavity. The other end of the thread cutting crank and the surface of the moving knife holder are respectively hinged to the two ends of the thread cutting connecting rod. The moving knife is detachably connected to the surface of the moving knife holder.
3. The thread cutting and shearing structure according to claim 2, wherein The utility model also includes a base and a pressing plate. The base is detachably connected to the inner wall of the operation cavity. The pressing plate is detachably connected to the surface of the base. The base and the pressing plate limit a groove. The moving knife holder is sleeved on the surface of the groove.
4. The thread cutting structure according to claim 1, wherein The surface of the wire passing hole has a thread cutting edge. The surface of the fixed knife has the thread cutting edge. There is a gap between the thread cutting edge on the moving knife and the thread cutting edge on the fixed knife.
5. The thread clipping structure having a thread clamping function according to claim 1, wherein, The other end of the line suction pipe is provided with a negative pressure source.
6. The thread clipping structure having a thread clamping function according to claim 1, wherein, The utility model also includes a positioning pad plate between the fixed knife and the casing.
7. The thread clipping structure having a thread clamping function according to claim 1, wherein The top of the casing is detachably connected with a positioning hook. The line suction pipe is above the positioning hook.
8. The thread clipping structure with a thread clamping function according to claim 6, wherein The material of the fixed knife pad plate is any one of rubber, latex, and silica gel.
9. The thread clipping structure having a thread clamping function according to claim 2, wherein, The moving knife is detachably connected to the surface of the moving knife holder through bolts, screws, threaded pins, or quick-release pins.
10. The thread clipping structure having a thread clamping function according to claim 1, wherein, The fixed knife is detachably connected to the surface of the casing through bolts, screws, threaded pins, or quick-release pins.