Flat sewing machine with assembled fastening structure
By designing a flat slit opening and a hollow structure at the bottom of the shuttle bed, combined with screw fixing, the problems of poor dynamic balance and noise of the rotary shuttle are solved, achieving stable rotation and reduced noise, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO DEYING PRECISION MACHINERY
- Filing Date
- 2025-07-14
- Publication Date
- 2026-06-26
AI Technical Summary
The existing method of fastening rotary hooks results in poor dynamic balance, which easily leads to eccentricity and generates noise during rotation.
The mounting shaft hole at the bottom of the shuttle bed is designed with a flat opening and is secured with a closing bolt. Combined with the hollow structure, dynamic balance is optimized. At the same time, the moon ring is fixed to the shuttle bed with fixing screws to reduce rotation noise.
It achieves stable rotation of the rotary hook, avoids eccentricity, reduces rotational noise, and extends service life.
Smart Images
Figure CN224412067U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of sewing machine technology, specifically relating to a flat-seam rotary shuttle with an assembly and fastening structure. Background Technology
[0002] A sewing machine is a machine that uses one or more sewing threads to create one or more stitches on fabric, allowing one or more layers of fabric to interweave or sew together. A rotary hook is an essential component in woven sewing; its function is to hook the top thread on the needle and interweave it with the thread inside the bobbin, thus forming a stitch. A rotary hook generally includes a hook case, a hook frame, a hook plate, and a hook skin.
[0003] The bottom of the existing rotary shuttle is usually fastened to the rotating shaft by multiple bolts distributed around the circumference. This method of fastening with multiple bolts has a limited fastening surface and may cause eccentricity, resulting in poor dynamic balance of the overall rotation. In addition, the existing ring is fixed to the shuttle from the side with fixing screws, and the rotation of the shuttle frame will generate noise. Utility Model Content
[0004] The purpose of this invention is to provide a flat-seam rotary hook with an assembly and fastening structure to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a flat-seam rotary shuttle with an assembly and fastening structure, comprising a shuttle bed, a shuttle frame with limited rotation is assembled inside the shuttle bed, a shuttle skin is installed on the outer side of the shuttle bed, a crescent ring for guiding the sewing thread is installed on the upper surface of the shuttle bed, and the bottom surface of the crescent ring is fixedly connected to the upper surface of the shuttle bed by fasteners, a mounting shaft hole is provided at the center of the bottom end of the shuttle bed, a flat-seam opening communicating with the outside is provided on the mounting shaft hole, a sewing bolt for shrinking and closing the flat-seam opening is provided at the bottom end of the shuttle bed by threaded engagement, and a hollow structure for maintaining dynamic balance is also provided on the shuttle bed.
[0006] Preferably, the fastener includes a plurality of threaded grooves formed on the top edge of the shuttle and a plurality of fixing screws disposed on the top surface of the moon ring and aligned with the threaded grooves, wherein the moon ring and the shuttle ring are fastened together by the fixing screws and the threaded grooves.
[0007] Preferably, the hollow structure includes an arc-shaped hollow and a hollow groove formed on the inner bottom surface of the shuttle bed, a side hollow groove formed on the outer surface of the shuttle bed and corresponding to the shuttle skin, and a plurality of drill holes formed on the top surface of the shuttle bed.
[0008] Preferably, the shuttle skin is provided with a plurality of mounting screws, and the shuttle skin is fastened to the outer surface of the shuttle bed by the plurality of mounting screws.
[0009] Preferably, the opening path of the flat slot coincides with the diameter of the mounting shaft hole.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] This utility model provides a flat slit opening in the mounting shaft hole at the bottom of the shuttle bed, and designs a closing bolt at the flat slit opening to shrink the mounting shaft hole, so that the mounting shaft hole of the shuttle bed and the mounting shaft are in surface contact. This not only ensures that the shuttle bed is installed more securely, but also avoids the eccentricity that occurs when using multiple bolts for fastening in the traditional way, ensuring that the rotation of the shuttle is more stable and there is no vibration.
[0012] This utility model features multiple hollow structures, which can optimize the dynamic balance of the rotary shuttle rotation and ensure more stable rotation.
[0013] This invention features a ring that is fixedly installed on the plane of the shuttle bed, which ensures that the shuttle frame rotates smoothly within the shuttle bed guide rail, significantly reduces noise during rotation, and increases the service life of the rotary shuttle. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the assembled state of this utility model;
[0015] Figure 2 This is a schematic diagram of the exploded structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the inner structure of the shuttle bed of this utility model;
[0017] Figure 4 This is a schematic diagram of the bottom part of the rotary hook of this utility model;
[0018] In the diagram: 1. Shuttle bed; 2. Shuttle skin; 3. Shuttle frame; 4. Moon ring; 5. Fixing screw; 6. Side hollow groove; 7. Threaded groove; 8. Drill hole; 9. Flat seam opening; 10. Seam closing bolt; 11. Mounting shaft hole; 12. Arc-shaped hollow; 13. Hollow groove. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Example 1
[0021] Please see Figures 1 to 4 This utility model provides a technical solution: a flat-seam rotary shuttle with an assembly and fastening structure, including a shuttle bed 1, a shuttle frame 3 with limited rotation inside the shuttle bed 1, a shuttle skin 2 installed on the outside of the shuttle bed 1, a crescent ring 4 for guiding the sewing thread installed on the upper surface of the shuttle bed 1, and the bottom surface of the crescent ring 4 is fixedly connected to the upper surface of the shuttle bed 1 by fasteners. A mounting shaft hole 11 is provided at the center of the bottom end of the shuttle bed 1, and a flat-seam opening 9 communicating with the outside is provided on the mounting shaft hole 11. A sewing bolt 10 for shrinking and closing the flat-seam opening 9 is provided at the bottom end of the shuttle bed 1 by threaded engagement, so that the mounting shaft hole 11 of the shuttle bed 1 and the mounting shaft are in surface contact, which not only ensures that the installation of the shuttle bed 1 is more secure, but also avoids the eccentricity that occurs when using multiple bolts for fastening in the traditional way; the shuttle bed 1 is also provided with a hollow structure for maintaining dynamic balance. In this embodiment, preferably, the fasteners include multiple threaded grooves 7 formed on the top edge of the shuttle bed 1, and multiple fixing screws 5 arranged on the top surface of the ring 4 and aligned with the threaded grooves 7. The ring 4 and the shuttle bed 1 are fastened together by the fixing screws 5 and the threaded grooves 7, which ensures that the shuttle frame 3 rotates smoothly within the shuttle bed guide rail, and the noise generated during rotation is greatly reduced, thus increasing the service life of the shuttle. In this embodiment, preferably, the hollow structure includes an arc-shaped hollow 12 and a hollow groove 13 formed on the inner bottom surface of the shuttle bed 1, a side hollow groove 6 formed on the outer surface of the shuttle bed 1 and corresponding to the shuttle skin 2, and multiple drilled holes 8 formed on the top surface of the shuttle bed 1; this can optimize the dynamic balance of the shuttle rotation and ensure more stable rotation.
[0022] In this embodiment, preferably, multiple mounting screws are distributed on the shuttle skin 2, and the shuttle skin 2 is fastened to the outer surface of the shuttle bed 1 by multiple mounting screws to ensure that the shuttle skin 2 is firmly installed.
[0023] In this embodiment, preferably, the opening path of the flat slot opening 9 coincides with the diameter of the mounting shaft hole 11.
[0024] Although embodiments of the present invention have been shown and described in detail above, 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 flat-seam rotary shuttle with an assembly and fastening structure, comprising a shuttle bed (1), wherein a shuttle frame (3) with a limit rotation is assembled inside the shuttle bed (1), and a shuttle skin (2) is installed on the outside of the shuttle bed (1), characterized in that: The upper surface of the shuttle bed (1) is equipped with a crescent ring (4) for guiding the sewing thread, and the bottom surface of the crescent ring (4) is fixedly connected to the upper surface of the shuttle bed (1) by fasteners. The center of the bottom end of the shuttle bed (1) is provided with a mounting shaft hole (11), and a flat seam opening (9) communicating with the outside is provided on the mounting shaft hole (11). The bottom end of the shuttle bed (1) is provided with a threaded closing bolt (10) for shrinking and closing the flat seam opening (9). The shuttle bed (1) is also provided with a hollow structure for maintaining dynamic balance.
2. The flat-seam rotary hook with assembly and fastening structure according to claim 1, characterized in that: The fasteners include multiple threaded grooves (7) formed on the top edge of the shuttle (1) and multiple fixing screws (5) set on the top surface of the ring (4) and aligned with the threaded grooves (7) one by one. The ring (4) and the shuttle (1) are fastened together by the fixing screws (5) and the threaded grooves (7).
3. A flat-seam rotary hook with an assembly and fastening structure according to claim 2, characterized in that: The hollow structure includes an arc-shaped hollow (12) and a hollow groove (13) on the inner bottom surface of the shuttle bed (1), a side hollow groove (6) on the outer surface of the shuttle bed (1) and corresponding to the shuttle skin (2), and a plurality of drill holes (8) on the top surface of the shuttle bed (1).
4. A flat-seam rotary hook with an assembly and fastening structure according to claim 1, characterized in that: The shuttle skin (2) has multiple mounting screws distributed on it, and the shuttle skin (2) is fastened to the outer surface of the shuttle bed (1) by the multiple mounting screws.
5. A flat-seam rotary hook with an assembly and fastening structure according to claim 1, characterized in that: The opening path of the flat slot opening (9) coincides with the diameter of the mounting shaft hole (11).