Joint four-needle six-thread movable tool holder

Abstract

The utility model relates to the technical field of joint machine, concretely to a joint four needle six line moving tool rest, including tool mounting bracket and bearing frame, the tool mounting bracket is opened with the installation groove, is provided with tool main body in the installation groove, the tool main body is fixed through tool fixing bolt, bearing frame is provided with one side of the tool mounting bracket, is provided with the installation platform on the bearing frame, the movable rod is installed on the installation platform, the movable rod is installed with movable block, reset spring is arranged between movable block and the installation platform, the utility model's purpose lies in providing a kind of joint four needle six line moving tool rest, by adopting integrated tool mounting bracket structure, avoid split screw fracture problem, optimize tool fixing mode and movable component reset design simultaneously, realize the effect that strong anti-vibration, edge cutting precision, maintenance is convenient, reduce equipment downtime rate, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically a sewing four-needle six-thread moving knife holder. Background Technology

[0002] Four-needle six-thread sewing machines, as highly efficient sewing equipment, are widely used in fabric processing scenarios requiring high-strength and high-flatness seams (such as sportswear and outdoor products). The moving cutter holder, as the core cutting component of the sewing machine, directly affects edge-cutting accuracy and processing efficiency due to its structural stability. Existing sewing machines use a split structure for the moving cutter holder's tool mounting bracket, fixed by multiple sets of screws. Due to prolonged exposure to high-frequency vibration (the vibration frequency of the sewing machine can reach 50-100Hz), the screws are prone to fatigue stress fracture, leading to disintegration of the tool mounting bracket and tool misalignment. This not only prevents workers from working normally and causes machine downtime, but also requires 1-2 hours of disassembly and replacement, severely impacting production efficiency (a single downtime results in a loss of approximately 50-100 pieces of fabric). Furthermore, the unreliable reset of some moving components of the moving cutter holder (such as the structure that drives the tool displacement) can easily cause cutting lag, further reducing processing quality. Therefore, there is an urgent need for an integrated, vibration-resistant, and stable moving cutter holder to address the pain points of existing technologies. Utility Model Content

[0003] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0004] In view of the problems existing in the current four-needle six-thread moving knife holder for seam stitching, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a four-needle six-thread moving knife holder for seams. By adopting an integrated knife mounting bracket structure, the problem of broken split screws is avoided. At the same time, the knife fixing method and the reset design of moving components are optimized to achieve the effects of strong vibration resistance, accurate edge cutting, and convenient maintenance, thereby reducing equipment downtime and improving production efficiency.

[0006] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution: A four-needle, six-thread sewing tool holder, comprising a tool mounting bracket and a support bracket; The tool mounting bracket has a mounting slot, in which a tool body is placed. The tool body is fixed by tool fixing bolts. A support frame is provided on one side of the tool mounting bracket, and a mounting platform is provided on the support frame. A movable rod is installed on the mounting platform, and a movable block is installed on the movable rod. A return spring is provided between the movable block and the mounting platform.

[0007] As a preferred embodiment of the four-needle six-thread moving knife holder for stitching described in this utility model, the knife fixing bolt is located on the side wall of the knife mounting bracket and is threadedly connected to the knife mounting bracket.

[0008] As a preferred embodiment of the four-needle six-thread movable knife holder for stitching described in this utility model, one end of the movable rod passes through the mounting platform and is fixedly connected to the knife mounting bracket.

[0009] As a preferred embodiment of the four-needle six-thread moving knife holder for stitching described in this utility model, the reset spring is sleeved on the movable rod and located on the side of the movable block away from the knife mounting bracket.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. Strong vibration resistance, avoiding downtime: The integrated tool mounting bracket eliminates the need for separate screws, completely solving the mechanical downtime problem caused by screw breakage. The monthly downtime rate of the equipment is reduced from 5-8 times in the existing technology to less than 0.5 times, reducing downtime losses by about 200-300 hours per year. 2. Precise and stable reset: The reset spring is sleeved on the movable rod, and the radial limit is achieved through the movable rod to avoid spring offset and twisting. The reset response time is ≤0.05s, ensuring that the cutter and sewing needle position are synchronized (stitch and edge spacing error ≤0.2mm). Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a two-dimensional structural diagram of the present invention from a second perspective; Figure 3 This is a schematic diagram of the third-view three-dimensional structure of this utility model.

[0012] In the diagram: 100 Tool mounting bracket, 110 Mounting slot, 120 Tool body, 130 Tool fixing bolt, 200 Bearing frame, 210 Mounting platform, 220 Movable rod, 230 Movable block, 240 Return spring. Detailed Implementation

[0013] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0014] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0015] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0017] This utility model provides the following technical solution: a four-needle six-thread moving knife holder for splicing, which has strong vibration resistance and avoids shutdown during use: adopts an integrated knife mounting bracket, eliminates the separate screws, completely solves the mechanical shutdown problem caused by screw breakage, reduces the monthly shutdown rate of the equipment from 5-8 times in the existing technology to less than 0.5 times, and reduces the annual shutdown loss by about 200-300 hours; Precise and stable reset: The reset spring is sleeved on the movable rod, and the radial limit is achieved through the movable rod to avoid spring offset and twisting. The reset response time is ≤0.05s, ensuring that the cutter and sewing needle position are synchronized (stitch and edge spacing error ≤0.2mm).

[0018] Figures 1-3 The diagram shown is a structural schematic of the first embodiment of the four-needle, six-thread movable knife holder for stitching according to this utility model. Please refer to [link / reference]. Figures 1-3 This embodiment of a four-needle six-thread sewing tool holder includes an integrated tool mounting bracket 100 and a support bracket 200, which work together to achieve tool fixation and precise displacement. The specific structure is as follows: Tool mount 100 structure (integrated design): The tool mounting bracket 100 is made of integral metal forging (preferably 6061 aluminum alloy, heat treated with T6, with a tensile strength ≥290MPa and vibration resistance 30% better than that of a split structure). It has a mounting groove 110 on the side facing the fabric processing (the depth of the mounting groove 110 is 1.2-1.5 times the thickness of the tool body 120 to ensure that the tool does not wobble after being inserted). The mounting slot 110 is fitted with a tool body 120 (the tool body 120 is made of high-speed steel W18Cr4V, and the cutting edge is vacuum quenched to achieve a hardness of HRC62-65, extending the service life to 1.5 times that of traditional tools). The tool body 120 is fastened by tool fixing bolts 130. The tool fixing bolt 130 is located on the side wall of the tool mounting bracket 100 and is connected to the tool mounting bracket 100 with a fine thread (the thread specification is preferably M6×1, with a small pitch, uniform preload, and vibration resistance twice as strong as coarse thread). The end of the bolt penetrates into the mounting groove 110 and abuts tightly against the side wall of the tool body 120. Single-point abutment replaces the multi-screw fixing of the traditional split structure, reducing vibration stress concentration. Support frame 200 and movable component structure (reset and stabilization design): A support frame 200 is fixedly installed on the non-cutting side (the side away from the cutting edge) of the tool mounting bracket 100 (the support frame 200 is connected to the sewing machine body by 4 sets of M8 bolts, and rubber vibration damping pads are added to the contact surface to reduce the transmission of machine body vibration). The top of the support frame 200 is integrally formed with a mounting platform 210 (the mounting platform 210 is a rectangular protruding structure with a surface flatness error of ≤0.05mm to ensure the coaxiality of the moving components). The mounting platform 210 has a through hole that is adapted to the moving rod 220 (the inner wall of the through hole is chrome-plated with a roughness Ra≤0.8μm to reduce sliding friction). The mounting platform 210 is equipped with a movable rod 220 (the movable rod 220 is made of 45# steel, with a diameter of 8-10mm, and the surface is high-frequency quenched, with a bending strength ≥800MPa). One end of the movable rod 220 passes through the through hole of the mounting platform 210 and is double-fixed to the side wall of the tool mounting bracket 100 by welding and locking with nuts (the weld height at the weld is ≥5mm, and an M8 anti-loosening nut is used to prevent the movable rod 220 from detaching from the mounting bracket). A movable block 230 is fitted on the movable rod 220 (the movable block 230 is a ring structure, and its inner wall is in clearance fit with the movable rod 220, with a clearance ≤0.02mm to ensure synchronous displacement). A return spring 240 is provided between the movable block 230 and the mounting platform 210. The return spring 240 is sleeved on the movable rod 220 and located on the side of the movable block 230 away from the tool mounting bracket 100 (spring wire diameter 2-3mm, free length 30-40mm, stiffness coefficient 5-8N / mm). One end of the spring abuts against the end face of the movable block 230, and the other end abuts against the side wall of the mounting platform 210 (or the spring limiting protrusion preset on the support frame 200). In the initial state, the return spring 240 is in a slightly pre-tightened state (compression amount 2-3mm) to ensure that the movable component has no play.

[0019] Combination Figures 1-3 The working principle of the four-needle six-thread moving knife holder for seams in this embodiment is as follows: Cutting operation status: After the sewing machine is started, the external drive mechanism (such as the cam transmission assembly of the sewing machine, the speed of which is synchronized with the sewing speed) pushes the movable block 230 to move along the movable rod 220 toward the tool mounting bracket 100. The movable block 230 compresses the return spring 240 (at this time, the spring stores elastic potential energy, and the maximum compression is ≤10mm to avoid spring fatigue and breakage). The displacement of the movable block 230 is synchronously transmitted to the cutter mounting frame 100 through the movable rod 220, which drives the cutter body 120 to move along the fabric feeding direction, so that the cutter edge is precisely in contact with the fabric seam (the cutting edge width is controlled at 0.5-1mm). It achieves synchronous cutting with the sewing speed of the sewing machine (usually 3000-5000 stitches / minute), ensuring that the cutting edge is flat and free of burrs. Reset and standby states: Once the single-segment fabric edge trimming is completed, the thrust of the external drive mechanism disappears, the return spring 240 releases its elastic potential energy, and pushes the movable block 230 to move in the opposite direction (away from the direction of the tool mounting bracket 100) along the movable rod 220. The movable block 230 drives the tool mounting bracket 100 and the tool body 120 back to their initial positions via the movable rod 220 (reset error ≤ 0.05 mm), waiting for the next section of fabric to be fed. The entire reset process is smooth and ensures the matching accuracy with the sewing needle position (stitch and edge spacing error ≤ 0.2 mm).

[0020] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The mechanical equipment and parts adopt conventional models in the prior art. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0021] In the description of this utility model, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A four-needle, six-thread moving knife holder for seams, characterized in that: Includes a tool mounting bracket (100) and a support bracket (200); The tool mounting bracket (100) has a mounting groove (110) and a tool body (120) is provided in the mounting groove (110). The tool body (120) is fixed by a tool fixing bolt (130). A support frame (200) is provided on one side of the tool mounting bracket (100). A mounting platform (210) is provided on the support frame (200). A movable rod (220) is installed on the mounting platform (210). A movable block (230) is installed on the movable rod (220). A return spring (240) is provided between the movable block (230) and the mounting platform (210).

2. The four-needle, six-thread moving knife holder for seams according to claim 1, characterized in that: The tool fixing bolt (130) is located on the side wall of the tool mounting bracket (100) and is threadedly connected to the tool mounting bracket (100).

3. The four-needle, six-thread moving knife holder for seams according to claim 1, characterized in that: One end of the movable rod (220) passes through the mounting platform (210) and is fixedly connected to the tool mounting bracket (100).

4. The four-needle, six-thread moving knife holder for seams according to claim 1, characterized in that: The reset spring (240) is sleeved on the movable rod (220) and is located on the side of the movable block (230) away from the tool mounting bracket (100).

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