Feeding mechanism for a sewing machine

Abstract

The utility model discloses a feeding mechanism for sewing machine, including needle plate, needle plate seat, feeding dental bridge, the needle plate, needle plate seat abuts, the feeding dental bridge is placed into the needle plate seat, the needle plate is the cover of D shape straight edge opening, is equipped with needle plate body and alveolus one side and is equipped with the accommodation cavity, and the accommodation cavity is matched with the mounting part of sewing machine body, and it is integrally formed through the mould, is equipped with two perforations for fixing it on sewing machine body, needle plate other side is equipped with alveolus, and the alveolus is protruding relative to needle plate body. The utility model has solved the problem of needle skipping, broken line, thread knotting in traditional sewing machine technology, which seriously affects production efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of sewing machines, specifically a feeding mechanism for sewing machines. Background Technology

[0002] Sewing machines are now widely used in light industries such as garment factories and bag factories. They play a crucial role in the production efficiency and yield rate of these factories. The needle plate, also known as the throat plate or feed plate, is a metal plate mounted on the sewing machine's worktable and surrounding the feed dog. It has precise holes for the needle and feed dog to pass through. From a simple support plate, it has evolved into a key component of a highly specialized and precision-manufactured sewing loop system. Its development reflects not only advancements in materials science and machining technology but also the continuous functional refinement and optimization of sewing machines to adapt to diverse sewing needs. Choosing the right needle plate, like choosing the correct needle and thread, is essential for achieving perfect stitches.

[0003] In existing technology, the toothed grooves of the needle plate are relatively wide. When sewing products made of harder materials, the toothed grooves cannot fit tightly against the product at corners, which leads to problems such as skipped stitches, broken threads, and knotted threads, seriously affecting production efficiency and product quality. Utility Model Content

[0004] (a) Technical problems to be solved.

[0005] To address the shortcomings of existing technologies, this utility model provides a feeding mechanism for sewing machines, which solves the problems mentioned in the background art, such as skipped stitches, broken threads, and knotted threads, which seriously affect production efficiency and product quality.

[0006] (ii) Technical solution.

[0007] To achieve the above objectives, this utility model is implemented through the following technical solution: a feeding mechanism for a sewing machine, including a needle plate, a needle plate seat, and a feeding tooth bridge. The needle plate and the needle plate seat abut against each other, and the feeding tooth bridge is placed inside the needle plate seat. The needle plate is a D-shaped cover with a straight-edged opening. It has a receiving cavity on one side with a needle plate body and a tooth groove. The receiving cavity matches the mounting part of the sewing machine body and is integrally formed by a mold. It has two through holes for fixing it to the sewing machine body. The other side of the needle plate has a tooth groove, which protrudes relative to the needle plate body.

[0008] Preferably, the feeding tooth bridge includes a feeding tooth, a cam opening, a feeding tooth seat, a fixed connecting rod, a cam connecting rod, a tooth lifting cam, and a feeding tooth seat crank. The feeding tooth is fixedly connected to the feeding tooth seat. One end of the fixed connecting rod is fixed to the machine body, and the other end is movably connected to the feeding tooth seat through the feeding tooth seat crank. One end of the cam connecting rod is driven by a cam on the machine body to make the feeding tooth reciprocate laterally, and the other end is movably connected to the feeding tooth seat through the feeding tooth seat crank. The feeding tooth seat is driven by a tooth lifting cam through a cam opening to make the feeding tooth reciprocate longitudinally.

[0009] Preferably, the needle plate seat is a D-shaped cover with a straight edge opening, and fixed blocks are provided on both sides for connecting the machine body. Its straight edge abuts against the straight edge of the needle plate. A receiving cavity is provided on one side, and two through holes are provided near the arc edge for fixed connection with the machine body. A camshaft hole is provided at the center between the two through holes for rotating connection with the lifting cam. The feeding tooth bridge is installed in the receiving cavity of the needle plate seat.

[0010] Preferably, the width of the alveolar groove is 15-21 mm.

[0011] Preferably, the alveolar protrusion is 7mm.

[0012] Preferably, the needle plate, needle plate seat, and feed bridge are made of metal.

[0013] Preferably, the needle plate, needle plate seat, and feed bridge are made of iron.

[0014] (iii) Beneficial effects.

[0015] This utility model provides a feeding mechanism for a sewing machine, which has the following advantages: the tooth groove protrudes outward and its width is reduced by more than half compared to the traditional tooth groove, which eliminates the problems of skipped stitches, broken threads, and knotted threads when sewing products such as suitcases at turning points, enabling fast sewing and improving production efficiency and product quality. Attached Figure Description

[0016] Figure 1 This is an exploded view of the present invention.

[0017] Figure 2 This is a schematic diagram of the needle plate of this utility model.

[0018] Figure 3 This is a schematic diagram of the needle plate holder of this utility model.

[0019] Figure 4 This is an exploded view of the feeding tooth bridge of this utility model.

[0020] In the diagram: 1. Needle plate; 2. Needle plate seat; 3. Feed tooth bridge; 11. Needle plate body; 12. Tooth groove; 21. Fixing block; 22. Cam shaft hole; 31. Feed tooth; 32. Cam opening; 33. Feed tooth seat; 34. Fixing connecting rod; 35. Cam connecting rod; 36. Tooth lifting cam; 37. Feed tooth seat crank. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] Please see Figures 1-4 This utility model provides a feeding mechanism for a sewing machine, including a needle plate, a needle plate seat, and a feeding tooth bridge. The needle plate and the needle plate seat abut against each other, and the feeding tooth bridge is placed inside the needle plate seat. The needle plate is a D-shaped cover with a straight-edged opening. It has a receiving cavity on one side with a needle plate body and a tooth groove. The receiving cavity matches the mounting part of the sewing machine body and is integrally formed by a mold. It has two through holes for fixing it to the sewing machine body. The other side of the needle plate has a tooth groove. The tooth groove protrudes 7mm relative to the needle plate body and the width of the tooth groove is 15-21mm, preferably 21mm. The needle plate, needle plate seat, and feeding tooth bridge are made of metal.

[0024] Example 2

[0025] Please see Figures 1-4 Based on Example 1, the needle plate, needle plate seat, and feed bridge are made of iron.

[0026] Example 3

[0027] Please see Figures 1-4 Based on Embodiment 1 or Embodiment 2, the feeding tooth bridge includes a feeding tooth, a cam opening, a feeding tooth seat, a fixed connecting rod, a cam connecting rod, a tooth lifting cam, and a feeding tooth seat crank. The feeding tooth is fixedly connected to the feeding tooth seat. One end of the fixed connecting rod is fixed to the machine body, and the other end is movably connected to the feeding tooth seat through the feeding tooth seat crank. One end of the cam connecting rod is driven by a cam on the machine body to make the feeding tooth perform lateral reciprocating motion, and the other end is movably connected to the feeding tooth seat through the feeding tooth seat crank. The feeding tooth seat is driven by a tooth lifting cam through a cam opening to make the feeding tooth perform longitudinal reciprocating motion.

[0028] Example 4

[0029] Please see Figures 1-4 Based on Embodiment 2, the needle plate seat is a D-shaped cover with a straight edge opening. It has fixing blocks on both sides for connecting the machine body. Its straight edge abuts against the straight edge of the needle plate. One side has a receiving cavity. Near the arc edge, there are two through holes for fixed connection with the machine body. A cam shaft hole is provided at the center between the two through holes for rotating connection with the lifting cam. The feeding tooth bridge is installed in the receiving cavity of the needle plate seat.

[0030] 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 feeding mechanism for a sewing machine, comprising a needle plate (1), a needle plate seat (2), and a feed dog bridge (3), characterized in that: The needle plate (1) and needle plate seat (2) abut against each other, and the feed tooth bridge (3) is placed inside the needle plate seat (2). The needle plate (1) is a D-shaped cover with a straight edge opening. It has a needle plate body (11) and tooth groove (12). One side has a receiving cavity that matches the installation part of the sewing machine body. It is integrally formed by a mold and has two through holes for fixing it to the sewing machine body. The other side of the needle plate (1) has a tooth groove (12). The tooth groove (12) protrudes relative to the needle plate body (11).

2. The feeding mechanism for a sewing machine according to claim 1, characterized in that: The feeding tooth bridge (3) includes a feeding tooth (31), a cam opening (32), a feeding tooth seat (33), a fixed connecting rod (34), a cam connecting rod (35), a tooth lifting cam (36), and a feeding tooth seat crank (37). The feeding tooth (31) is fixedly connected to the feeding tooth seat (33). One end of the fixed connecting rod (34) is fixed to the machine body, and the other end is movably connected to the feeding tooth seat (33) through the feeding tooth seat crank (37). One end of the cam connecting rod (35) is connected to the cam on the machine body to make the feeding tooth reciprocate laterally, and the other end is movably connected to the feeding tooth seat (33) through the feeding tooth seat crank (37). The feeding tooth seat (33) is connected to the tooth lifting cam (36) through the cam opening (32) to make the feeding tooth (31) reciprocate longitudinally.

3. The feeding mechanism for a sewing machine according to claim 2, characterized in that: The needle plate seat (2) is a D-shaped cover with a straight edge opening. It has fixing blocks (21) on both sides for connecting the machine body. Its straight edge abuts against the straight edge of the needle plate (1). It has a receiving cavity on one side and two through holes near the arc edge for fixing to the machine body. A cam shaft hole (22) is provided at the center between the two through holes, which is rotatably connected to the lifting cam (36). The feeding tooth bridge (3) is installed in the receiving cavity of the needle plate seat (2).

4. A feeding mechanism for a sewing machine according to any one of claims 1-3, characterized in that: The width of the alveolar bone (12) is 15-21 mm.

5. A feeding mechanism for a sewing machine according to any one of claims 1-3, characterized in that: The alveolar bone (12) protrudes by 7 mm.

6. A feeding mechanism for a sewing machine according to any one of claims 1-3, characterized in that: The needle plate (1), needle plate seat (2), and feed bridge (3) are made of metal.

7. A feeding mechanism for a sewing machine according to claim 6, characterized in that: The needle plate (1), needle plate seat (2), and feed tooth bridge (3) are made of iron.

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