Self-driven cooling automatic thread trimming device
By designing a self-driving and cooling automatic thread cutting device in the sewing machine shuttle, the automatic oil supply module is driven by the heat generated by the shuttle, real-time addition and heat dissipation of lubricating oil is achieved, and the problems of cumbersome and difficult to control lubricating oil in the prior art are solved, and production efficiency and product quality are improved.
Patent Information
- Application Number
- CN202421855123.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-01
AI Technical Summary
In the existing shuttle structure of sewing machines, the friction between the shuttle rack and the shuttle bed causes the temperature to rise, and regular lubrication and oil supply are required, but the process is cumbersome and difficult to control. Insufficient or excessive fueling volume will affect product quality.
An automatic wire cutting device for self-driving and cooling is designed, and the automatic oil supply assembly is driven by the heat generated during the operation of the shuttle, real-time addition and heat dissipation of lubricating oil is achieved through the pipes and fiber cores, ensuring that the viscosity of the lubricating oil is reduced and adhered to the friction position through surface tension.
It realizes automatic and real-time addition of lubricant during the shuttle operation, reduces friction heat, improves the adaptability and production efficiency of the machine, avoids the tedious process of shutdown and refueling, and reduces the waste and pollution of lubricant.
Smart Images
Figure CN222908270U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of an automatic thread cutting device for a computer sewing machine, in particular to an automatic thread cutting device with self-driving cooling. Background Art
[0002] The rotating hook is an important component of a sewing machine. In a lockstitch sewing machine most commonly used in industries such as garment making and shoe making, a rotating hook is mostly adopted. During operation, the tip of the rotating hook hooks the thread loop, simultaneously enlarges the thread loop, and guides the thread loop to surround the shuttle carrier to form a lockstitch.
[0003] In the existing structure of a sewing machine rotating hook, the shuttle carrier guide rail on the shuttle carrier and the corresponding track table on the shuttle bed are both in sliding friction. During use, since the shuttle bed rotates at a high speed relative to the shuttle carrier, in order to reduce the friction between the two and ensure the normal operation of the rotating hook, it is necessary to regularly lubricate and supply oil and stop the machine. The operation process is not only cumbersome, but also the amount of oil added is often difficult to control. When the amount of oil added is insufficient, it is necessary to frequently stop the machine to add oil. When the amount of oil added is too large, not only will it cause spillage and waste, but also the spilled lubricating oil may even contaminate the sewing thread or the clothing, thus affecting the product quality. Summary of the Invention
[0004] The purpose of the utility model is to provide an automatic thread cutting device with self-driving cooling. During the use of the rotating hook, as the temperature rises, the utility model is conducive to the real-time addition of lubricating oil with the change of the viscosity of the lubricating oil, providing lubricating oil for lubrication while dissipating heat.
[0005] To solve this technical problem, the technical solution of the utility model is: an automatic thread cutting device with self-driving cooling, including a driving component and a cutting component installed on the shuttle bed transmission shaft. The cutting component includes a movable knife and a fixed knife; wherein the movable knife is connected to a moving knife seat and a thread cutting transmission shaft sleeve coaxially sleeved outside the shuttle bed transmission shaft. The moving knife seat and the thread cutting transmission shaft sleeve are fixedly connected, and the driving component drives the thread cutting transmission shaft sleeve to drive the movable knife to rotate relative to the fixed knife;
[0006] An automatic oil supply component driven by frictional heat generation is arranged between the rotating hook and the shuttle bed transmission shaft.
[0007] Further improvement, the automatic oil supply component includes an oil supply unit, a pipeline and a fiber core that are in communication with the oil supply unit and contact the lubricating oil. The fiber core that contacts the oil supply unit and the cooling position at both ends is filled inside the pipeline. In the utility model, the automatic oil supply component utilizes the fluidity and viscosity of the lubricating oil through the pipeline and the fiber core, so that under normal temperature or when the frictional heat generation is not serious, the lubricating oil is stored between the pipeline and the fiber core. When the temperature of the machine table rises due to friction, the continuous lubricating oil slowly adheres to the friction position through surface tension; the structure of the automatic oil supply component in the utility model is simple, convenient to cooperate with the existing machine table, and at the same time provides a good self-driving cooling effect.
[0008] As a further improvement, the mounting seat is provided with a mounting hole, and a pipeline for accommodating the fiber core and lubricating oil is arranged on the mounting seat through the mounting hole. The utility model has a compact structure and little impact on the equipment structure.
[0009] Further improvement, the shearing assembly includes, in sequence from the circumference to the center of the circle along the shuttle bed transmission shaft radial direction, a fixed knife fixed to the mounting seat and having a certain length along the circumferential direction, a movable knife installed on the shuttle bed transmission shaft through a movable knife seat, and a wire guard fixed to the mounting seat; the movable knife extends into between the fixed knife and the wire guard or moves away from the fixed knife and the wire guard along with the driving assembly;
[0010] A wire dividing piece is fixed on the side of the movable knife facing the rotary shuttle. When the movable knife and the fixed knife are shearing, the wire dividing piece and the wire guard piece contact to form a bottom line elongation structure. In the utility model, when the movable blade rotates to the cutting position relative to the wire dividing piece and the fixed knife with the driving assembly, that is, the wire cutting protrusion on the surface of the movable knife contacts the blade of the fixed knife, the bottom line of the rotary shuttle shuttle core is elongated and fixed with the contact of the wire dividing piece of the wire guard piece. Since the length of the bottom line thread head is guaranteed and supported and guided by the movable knife, when the needle passing through the surface thread is inserted into the rotary shuttle again, the edge of the rotary shuttle rotates with the shuttle bed transmission shaft to ensure that the coil of the surface thread once again wraps the thread head of the bottom line, and the thread is put on again; the utility model utilizes the relative rotation between the positioning piece and the movable knife during the thread cutting process to complete the thread cutting while utilizing the contact between the guide wire piece and the wire guard piece to form the winding and positioning of the bottom line, effectively elongating the bottom line, and facilitating the next needle and threading.
[0011] As a further improvement, the wire splitting piece protrudes from the movable knife toward the fixed knife along the circumferential direction, and the width of the portion of the wire splitting piece protruding from the movable knife gradually decreases toward the wire protection piece. The utility model uses the portion of the wire splitting piece protruding from the movable knife to guide the bottom line into the movable knife, thereby achieving effective cutting.
[0012] As a further improvement, the movable knife is provided with a guide notch on one side facing the fixed knife, and a wire storage groove extending from the guide notch and distributed along the circumferential direction; the guide notch has an open structure along the wire cutting direction, and the bottom end of the guide notch is connected to the wire storage groove; the fixed knife and the movable knife rotating along the wire cutting direction form a surface contact until the blade of the fixed knife moves to the wire cutting protrusion of the movable knife. The utility model effectively ensures the shearing of the bottom line while protecting the extension and positioning of the bottom line. When the movable knife is reset to the non-shearing position, the bent thread head supported by the movable knife and the wire dividing sheet is in the moving path of the surface line, which effectively ensures the upper line.
[0013] As a further improvement, the wire protection sheet includes a fixed section fixed to the mounting seat, an interference section for contacting with the wire dividing sheet to form a bottom line elongated structure, and a limiting section arranged parallel to the fixed knife.
[0014] For further improvement, the movable knife is fixedly connected to a thread cutting transmission shaft sleeve coaxially nested with the shuttle bed transmission shaft through a movable knife seat, and both ends of the thread cutting transmission shaft sleeve are respectively installed on the shuttle bed transmission shaft through needle roller bearings;
[0015] The thread cutting transmission shaft sleeve drives the thread cutting transmission shaft sleeve and the movable knife to rotate relative to the fixed knife through a driving component.
[0016] By adopting the above technical solutions, the beneficial effects of the present utility model are as follows:
[0017] The present utility model utilizes the heat generated during the operation of the rotating shuttle to drive the reduction of the viscosity of the lubricating oil absorbed and infiltrated in the automatic oil supply component, so that it slowly adheres between the rotating shuttle and the shuttle bed transmission shaft through surface tension. The frictional heat generated during the operation of the machine promotes the slow flow and spread of the lubricating oil, which not only promotes the heat dissipation of the machine table but also realizes the lubrication of the friction position; and when the temperature is high, the viscosity of the lubricating oil is lower, and more lubricating oil flows and spreads, which has good self - adaptability. It can realize the addition of lubricating oil without stopping the machine, and the addition amount of lubricating oil has a certain self - adaptability. Description of the Drawings
[0018] Figure 1 is a perspective view of an automatic thread cutting device with self - driven cooling according to the present utility model;
[0019] Figure 2 is a perspective view of an automatic thread cutting device with self - driven cooling according to the present utility model;
[0020] Figure 3 is a schematic diagram of the relative position of the heat dissipation oil pipeline and the shearing component in the present utility model;
[0021] Figure 4 is a cooperation diagram of the shearing component and the driving component in the present utility model;
[0022] Figure 5 is a schematic structural diagram of the mounting seat and the shearing component in a separated state in the present utility model;
[0023] Figure 6 is a perspective structural diagram of the movable knife and the thread dividing piece in the present utility model;
[0024] Figure 7 is a front view of the shearing component in the present utility model;
[0025] Figure 8 is a schematic structural diagram of the shearing component performing a shearing action in the present utility model.
[0026] In the figure:
[0027] Bobbin shaft transmission shaft 1; drive assembly 2; shearing assembly 3; movable knife 31; thread cutting projection 311; guiding notch 312; wire storage groove 313; fixed knife 32; movable knife seat 33; wire protecting piece 34; fixed section 341; abutting section 342; limiting section 343; wire separating piece 35; thread cutting transmission shaft sleeve 4; rotating shuttle 5; automatic oil supply assembly 6; pipeline 62; mounting seat 7; mounting hole passage 71 。 Detailed implementation manners
[0028] In order to further explain the technical solution of the present invention, the present invention will be elaborated in detail through specific embodiments below.
[0029] This embodiment discloses an automatic thread cutting device with self-driving cooling, as Figures 1 to 8 shown, including a drive assembly 2 and a shearing assembly 3 mounted on the bobbin shaft transmission shaft 1. The shearing assembly 3 includes a movable knife 31 and a fixed knife 32. The movable knife 31 is connected to the bobbin shaft transmission shaft 1 through a movable knife seat 33 and a thread cutting transmission shaft sleeve 4 coaxially sleeved outside the bobbin shaft transmission shaft 1. The movable knife seat 33 and the thread cutting transmission shaft sleeve 4 are fixedly connected, and the drive assembly 2 drives the thread cutting transmission shaft sleeve 4 to drive the movable knife 31 to rotate relative to the fixed knife 32.
[0030] An automatic oil supply assembly 6 driven by frictional heat generation is provided between the rotating shuttle 5 and the bobbin shaft transmission shaft 1.
[0031] The automatic oil supply assembly 6 in this embodiment includes an oil supply unit 61, a pipeline 62 and a fiber core that communicate with the oil supply unit 61 to contact lubricating oil. The fiber core with both ends respectively contacting the oil supply unit and the cooling position is filled inside the pipeline 62. In this embodiment, the automatic oil supply assembly 6 utilizes the fluidity and viscosity of the lubricating oil through the pipeline 62 and the fiber core, so that under normal temperature or when the frictional heat generation is not serious, the lubricating oil is stored between the pipeline 62 and the fiber core. When the temperature of the machine table rises due to friction, the continuous lubricating oil slowly adheres to the friction position through surface tension. The automatic oil supply assembly 6 in this embodiment has a simple structure, is convenient to cooperate with the existing machine table, and at the same time provides a good self-driving cooling effect.
[0032] The mounting seat 7 in this embodiment is provided with a mounting hole passage 71, and the pipeline 62 for accommodating the fiber core and the lubricating oil is arranged in the mounting seat 7 through the mounting hole passage 71. The structure of this embodiment is compact and has little influence on the equipment structure.
[0033] The shearing assembly 3 in this embodiment sequentially includes a fixed knife 32 fixed on the mounting seat 7 and having a certain length along the circumferential direction, a movable knife 31 mounted on the bobbin shaft transmission shaft 1 through a movable knife seat 33, and a wire protecting piece 34 fixed on the mounting seat 7 along the radial direction of the bobbin shaft transmission shaft 1 from the circumference towards the center. The movable knife 31 extends into or away from between the fixed knife 32 and the wire protecting piece 34 along with the drive assembly 2.
[0034] A wire dividing piece 35 is fixed to the side of the movable knife 31 facing the rotary hook 5. When the movable knife 31 and the fixed knife 32 are shearing, the wire dividing piece 35 contacts the wire protecting piece 34 to form a bottom line elongated structure. In this embodiment, when the movable blade rotates relative to the wire dividing piece 35 and the fixed knife 32 with the driving assembly 2 to the cutting position, that is, the wire cutting protrusion 311 on the surface of the movable knife 31 contacts the blade of the fixed knife 32, the bottom line of the shuttle core of the rotary shuttle 5 is elongated and fixed as the wire dividing piece 35 contacts the wire guard piece 34. Since the length of the bottom line thread end is guaranteed and supported and guided by the movable knife 31, when the needle passing through the surface thread is inserted into the rotary shuttle 5 again, the edge of the rotary shuttle 5 rotates with the shuttle bed transmission shaft 1 to ensure that the coil of the surface thread once again wraps the thread end of the bottom line, completing the threading again; in this embodiment, the relative rotation between the fixed knife 32 and the movable knife 31 during the thread cutting process is used to complete the thread cutting and at the same time utilize the contact between the guide wire piece and the wire guard piece 34 to form the winding and positioning of the bottom line, effectively elongating the bottom line, and facilitating the next needle and threading.
[0035] The wire splitting piece 35 of this embodiment protrudes from the movable knife 31 toward the fixed knife 32 along the circumferential direction, and the portion of the wire splitting piece 35 protruding from the movable knife 31 gradually decreases in width toward the wire protection piece 34. This embodiment utilizes the portion of the wire splitting piece 35 protruding from the movable knife 31 to guide the bottom line into the movable knife 31, thereby achieving effective cutting.
[0036] The movable knife 31 of this embodiment is provided with a guide notch 312 and a wire storage groove 313 extending from the guide notch 312 and distributed along the circumferential direction. The guide notch 312 has an open structure along the wire cutting direction, and the bottom end of the guide notch 312 is connected to the wire storage groove 313. The fixed knife 32 and the movable knife 31 rotating along the wire cutting direction form a surface contact until the blade of the fixed knife 32 moves to the wire cutting protrusion 311 of the movable knife 31. This embodiment effectively ensures the cutting of the bottom line while protecting the extension and positioning of the bottom line. When the movable knife 31 is reset to the non-cutting position, the bent thread head supported by the movable knife 31 and the wire dividing sheet 35 is in the moving path of the surface thread, effectively ensuring the upper thread.
[0037] The wire protection piece 34 of this embodiment includes a fixing section 341 fixed to the mounting seat 7 , an abutting section 342 for contacting with the wire dividing piece 35 to form a bottom line elongated structure, and a limiting section 343 arranged parallel to the fixed knife 32 .
[0038] The movable knife 31 of this embodiment is fixedly connected to the thread trimming transmission sleeve 4 coaxially nested with the shuttle bed transmission shaft 1 through the movable knife seat 33, and the two ends of the thread trimming transmission sleeve 4 are respectively installed on the shuttle bed transmission shaft 1 through needle bearings;
[0039] The wire cutting transmission shaft sleeve 4 is driven by the driving assembly 2 to drive the wire cutting transmission shaft sleeve 4 and the movable knife 31 to rotate relative to the fixed knife 32.
[0040] The specific working process of this embodiment is as follows:
[0041] In this embodiment, in the fast production rhythm of coordinating automatic sewing and automatic wire cutting, the heat generated by the rotating shuttle 5 during operation is utilized to drive the viscosity reduction of the lubricating oil absorbed and infiltrated in the automatic oil supply assembly 6. The lubricating oil slowly adheres between the rotating shuttle 5 and the shuttle bed transmission shaft 1 through surface tension. The heat generated by the machine working friction promotes the slow flow and spread of the lubricating oil, which not only promotes the heat dissipation of the machine table but also realizes the lubrication of the friction position; and when the temperature is high, the viscosity of the lubricating oil is lower, and more lubricating oil flows and spreads, with good self - adaptability. The addition of lubricating oil can be achieved without stopping the machine, and the addition amount of lubricating oil has a certain self - adaptability. In this embodiment, automatic wire cutting can be carried out while automatically lubricating, the degree of automation in the sewing process is high, and continuous production is reliable.
Claims
1. A self-driven cooling automatic thread trimming device, characterized in that: It includes a driving assembly and a shearing assembly installed on the shuttle bed transmission shaft, and the shearing assembly includes a movable knife and a fixed knife; The movable knife is connected to the movable knife seat and the thread trimming transmission sleeve coaxially sleeved on the outside of the shuttle bed transmission shaft. The movable knife seat and the thread trimming transmission sleeve are fixedly connected, and the driving assembly drives the thread trimming transmission sleeve to drive the movable knife to rotate relative to the fixed knife. An automatic oil supply component driven by frictional heat is arranged between the rotary hook and the shuttle bed transmission shaft.
2. The self-driven cooling automatic thread trimming device according to claim 1, characterized in that: The automatic oil supply assembly comprises an oil supply unit, a pipeline and a fiber core connected to the oil supply unit and contacting the lubricating oil. The fiber core with two ends contacting the oil supply unit and the cooling position respectively is filled in the pipeline.
3. The self-driven cooling automatic thread trimming device according to claim 2, characterized in that: The mounting seat is provided with a mounting hole, and a pipeline for accommodating the fiber core and lubricating oil is arranged on the mounting seat through the mounting hole.
4. The self-driven cooling automatic thread trimming device according to claim 1, characterized in that: The shearing assembly includes, in order from the circumference to the center of the circle along the shuttle bed transmission shaft, a fixed knife fixed to the mounting seat and having a certain length in the circumferential direction, a movable knife installed on the shuttle bed transmission shaft through a movable knife seat, and a wire guard fixed to the mounting seat; the movable knife extends into between the fixed knife and the wire guard or moves away from the fixed knife and the wire guard along with the driving assembly; A wire dividing piece is fixed on the side of the movable knife facing the rotary hook. When the movable knife and the fixed knife are shearing, the wire dividing piece contacts the wire protecting piece to form a bottom line elongated structure.
5. The self-driven cooling automatic thread trimming device according to claim 4, characterized in that: The wire dividing piece protrudes from the movable knife toward the fixed knife along the circumferential direction, and the width of the portion of the wire dividing piece protruding from the movable knife gradually decreases toward the wire protecting piece.
6. The self-driven cooling automatic thread trimming device according to claim 4, characterized in that: The movable knife is provided with a guide notch on one side facing the fixed knife and a wire storage groove extending from the guide notch and distributed along the circumferential direction; the guide notch has an open structure along the wire cutting direction, and the bottom end of the guide notch is connected to the wire storage groove; the fixed knife forms a surface contact with the movable knife rotating along the wire cutting direction until the blade of the fixed knife moves to the wire cutting protrusion of the movable knife.
7. The self-driven cooling automatic thread trimming device according to claim 4, characterized in that: The wire protection piece comprises a fixed section fixed to the mounting seat, an interference section for contacting with the wire dividing piece to form a bottom line elongated structure, and a limiting section arranged parallel to the fixed knife.
8. The self-driven cooling automatic thread trimming device according to claim 4, characterized in that: The movable knife is fixedly connected to a thread trimming transmission sleeve coaxially nested with the shuttle bed transmission shaft through a movable knife seat, and both ends of the thread trimming transmission sleeve are respectively installed on the shuttle bed transmission shaft through needle bearings; The thread trimmer transmission shaft sleeve drives the thread trimmer transmission shaft sleeve and the movable knife to rotate relative to the fixed knife through the driving assembly.