Feeding tooth structure and sewing machine

Abstract

The utility model discloses a feeding tooth structure and a sewing machine in the technical field of sewing machines. The feeding tooth structure comprises a feeding tooth body. The feeding main tooth is arranged above the feeding tooth body; and the auxiliary feeding teeth are arranged on one side of the main feeding teeth, the auxiliary feeding teeth are connected with the feeding tooth body, and the upper surfaces of the auxiliary feeding teeth are located above the upper surfaces of the main feeding teeth. The independent feeding mode is adopted, the auxiliary feeding teeth with the adjustable height are installed on one side of the main feeding teeth, the difference between the cloth feeding efficiency of upper-layer fabric and the cloth feeding efficiency of lower-layer fabric can be reduced, the phenomenon that the upper-layer fabric and the lower-layer fabric are staggered is avoided, and the cloth feeding device has the advantages of being simple in structure, low in cost and convenient to adjust. The method can be better accepted by clients.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a feed dog structure and a sewing machine. Background Technology

[0002] When sewing double-layered fabrics with a sewing machine, the feeding efficiency of the upper and lower layers of fabric is often inconsistent, leading to misalignment of the upper and lower layers. This is especially problematic when hemming, as it can cause the fabric to twist and significantly affect the sewing quality.

[0003] The misalignment of the upper and lower fabrics is caused by the lower fabric being fed by the teeth of the feed dog, while the upper fabric is fed by the lower fabric. In the existing technology, in order to solve the above problem, a sewing machine with an upper feed dog is usually used. However, such a sewing machine has the problems of complex structure and high cost, and is not easy to be adopted by users.

[0004] Therefore, how to solve the problem of misalignment between the upper and lower layers of fabric has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide a feeding tooth structure to solve the technical problem of misalignment of the upper and lower layers of fabric when sewing double-layer fabric in existing sewing machines.

[0006] The technical solution adopted in this utility model is: a feeding tooth structure, comprising:

[0007] Feeding dog body;

[0008] The main feeding tooth is positioned above the main feeding tooth body;

[0009] A feeding auxiliary tooth is disposed on one side of the main feeding tooth, the feeding auxiliary tooth is connected to the main feeding tooth body, and the upper surface of the feeding auxiliary tooth is located above the upper surface of the main feeding tooth.

[0010] Preferably, the distance between the upper surface of the feed auxiliary tooth and the upper surface of the feed main tooth is adjustable.

[0011] Preferably, the feed auxiliary tooth is detachably and fixedly connected to the feed tooth body.

[0012] Preferably, the feeding tooth body has a connecting hole formed therein, one end of the feeding auxiliary tooth is connected to a mounting block, the mounting block has an adjusting slot formed therein that matches the connecting hole, the length of the adjusting slot is greater than the width of the slot, and an adjusting screw is installed in the adjusting slot, the end of the adjusting screw is threaded into the connecting hole.

[0013] Preferably, the feeding tooth body has a vertical guide groove formed therein, and the mounting block is installed in the vertical guide groove.

[0014] Preferably, the main feed tooth and the feed tooth body are detachably and fixedly connected.

[0015] Preferably, the feeding tooth body has a connecting hole formed therein, one end of the feeding main tooth is connected to a mounting block, the mounting block has an adjusting slot formed therein that matches the connecting hole, the length of the adjusting slot is greater than the width of the slot, and an adjusting screw is installed in the adjusting slot, the end of the adjusting screw is threaded into the connecting hole.

[0016] Preferably, the feeding tooth body has a vertical guide groove formed therein, and the mounting block is installed in the vertical guide groove.

[0017] The second objective of this invention is to provide a sewing machine that includes the aforementioned feed tooth structure.

[0018] The beneficial effects of this utility model are:

[0019] This invention employs an independent feeding method, with a secondary feeding tooth provided on one side of the main feeding tooth. The upper surface of the secondary feeding tooth is higher than the upper surface of the main feeding tooth. This allows the upper surface of the secondary feeding tooth to contact and feed the upper fabric of the folded edge when the main feeding tooth performs the feeding action on the lower fabric of the folded edge. This achieves independent feeding of the upper and lower fabrics, which not only reduces the difference in feeding efficiency between the upper and lower fabrics and avoids the occurrence of mis-layering of the upper and lower fabrics, but also has the advantages of simple structure, low cost, and convenient adjustment, making it more acceptable to customers. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the feeding tooth structure of this utility model;

[0021] Figure 2 This is an exploded view of the feeding tooth structure of this utility model;

[0022] Figure 3 A three-dimensional schematic diagram of the feed tooth body and the main feed tooth;

[0023] Figure 4 A three-dimensional schematic diagram of the feeding auxiliary tooth and the mounting block;

[0024] Figure 5 This is a three-dimensional schematic diagram of the feed tooth body and the feed accessory tooth;

[0025] Figure 6 A three-dimensional schematic diagram of the mounting block for the main feed tooth;

[0026] Figure 7 This is a reference diagram showing the usage state of the feeding tooth structure of this utility model.

[0027] Explanation of the reference numerals in the figure:

[0028] 10. Feeding tooth body; 11. Connecting hole; 12. Vertical guide groove; 13. Mounting hole;

[0029] 20. Main feeding teeth; 21. Main teeth;

[0030] 30. Feeding auxiliary teeth; 31. Auxiliary teeth;

[0031] 40. Mounting block; 41. Adjustment slot;

[0032] 50. Adjusting screw;

[0033] 60. Presser foot;

[0034] 70. Machine needle;

[0035] 80. Fabric. Detailed Implementation

[0036] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. These embodiments are only used to illustrate this utility model and are not intended to limit it.

[0037] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not 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 on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] Examples, such as Figures 1-7 As shown, a feeding tooth structure includes a feeding tooth body 10, a main feeding tooth 20, and a secondary feeding tooth 30; the main feeding tooth 20 is disposed above the feeding tooth body 10; the secondary feeding tooth 30 is disposed on one side of the main feeding tooth 20, the secondary feeding tooth 30 is connected to the feeding tooth body 10, and the upper surface of the secondary feeding tooth 30 is located above the upper surface of the main feeding tooth 20.

[0041] This invention employs an independent feeding method. A secondary feeding tooth 30 is provided on one side of the main feeding tooth 20, and the upper surface of the secondary feeding tooth 30 is higher than the upper surface of the main feeding tooth 20. This allows the upper surface of the secondary feeding tooth 30 to contact the upper fabric of the folded edge and perform the feeding action when the main feeding tooth 20 feeds the lower fabric of the folded edge. This achieves independent feeding of the upper and lower fabrics, which not only reduces the difference in feeding efficiency between the upper and lower fabrics and avoids the occurrence of mis-layering of the upper and lower fabrics, but also has the advantages of simple structure, low cost, and convenient adjustment, making it more acceptable to customers.

[0042] Specific embodiment 1, such as Figures 1-4 and Figure 7 As shown, a feeding tooth structure includes a feeding tooth body 10, a main feeding tooth 20, and a secondary feeding tooth 30. The main feeding tooth 20 is fixedly installed above the feeding tooth body 10. The secondary feeding tooth 30 is located on one side of the main feeding tooth 20, and the secondary feeding tooth 30 is detachably and fixedly connected to the feeding tooth body 10. The upper surface of the secondary feeding tooth 30 is located above the upper surface of the main feeding tooth 20, and the distance between the upper surface of the secondary feeding tooth 30 and the upper surface of the main feeding tooth 20 is adjustable.

[0043] Specifically, the main feeding tooth 20 is integrally formed on the upper part of one end of the feeding tooth body 10. Three rows of main teeth 21 are formed at the top of the main feeding tooth 20, and the three rows of main teeth 21 are horizontally spaced along the vertical feeding direction. The auxiliary feeding tooth 30 is arranged side by side on one side of the main feeding tooth 20. A row of auxiliary teeth 31 is formed at the top of the auxiliary feeding tooth 30, and the upper surface of the auxiliary teeth 31 is located above the upper surface of the main teeth 21.

[0044] Preferably, a connecting hole 11 is formed at one end of the feeding tooth body 10 near the main feeding tooth 20, and the axis of the connecting hole 11 is set along the feeding direction. A mounting hole 13 is formed at the other end of the feeding tooth body 10 away from the main feeding tooth 20. A mounting block 40 is integrally formed below one end of the feeding auxiliary tooth 30. An adjustment slot 41 that mates with the connecting hole 11 is formed on the mounting block 40. The length (vertical direction) of the adjustment slot 41 is greater than the width (horizontal direction). An adjustment screw 50 is installed in the adjustment slot 41. The end of the adjustment screw 50 passes through the adjustment slot 41 and is threaded into the connecting hole 11. The feeding auxiliary tooth 30 and the feeding tooth body 10 are detachably fixedly connected by screwing the adjustment screw 50 in and out. At the same time, the distance between the upper surface of the feeding auxiliary tooth 30 and the upper surface of the main feeding tooth 20 can be adjusted by adjusting the relative position of the feeding auxiliary tooth 30 and the adjustment screw 50.

[0045] More preferably, a vertical guide groove 12 is formed on the feed tooth body 10. The vertical guide groove 12 communicates with the connecting hole 11. The mounting block 40 is installed in the vertical guide groove 12, and the width of the mounting block 40 is equal to the width of the vertical guide groove 12, so that the mounting block 40 can rise or fall within the vertical guide groove 12, thereby ensuring that the horizontal distance between the feed auxiliary tooth 30 and the feed main tooth 20 remains constant.

[0046] Specific embodiment 2, such as Figure 1 , Figure 2 , Figures 5-7 As shown, a feeding tooth structure includes a feeding tooth body 10, a main feeding tooth 20, and a secondary feeding tooth 30. The main feeding tooth 20 is located above one end of the feeding tooth body 10. The secondary feeding tooth 30 is located on one side of the main feeding tooth 20. The secondary feeding tooth 30 is fixedly connected to the feeding tooth body 10, and its upper surface is located above the upper surface of the main feeding tooth 20. The main feeding tooth 20 is detachably fixedly connected to the feeding tooth body 10 so that the distance between the upper surface of the secondary feeding tooth 30 and the upper surface of the main feeding tooth 20 can be adjusted.

[0047] Specifically, the auxiliary feeding tooth 30 is arranged side by side on one side of the main feeding tooth 20, and the auxiliary feeding tooth 30 is integrally formed on the upper part of one end of the main feeding tooth body 10. A row of auxiliary teeth 31 arranged along the feeding direction is formed at the top of the auxiliary feeding tooth 30. The bottom of the main feeding tooth 20 is detachably fixed to one end of the main feeding tooth body 10. Three rows of main teeth 21 are formed at the top of the main feeding tooth 20. The three rows of main teeth 21 are horizontally spaced along the vertical feeding direction, and the upper surface of the auxiliary teeth 31 is located above the upper surface of the main teeth 21.

[0048] Preferably, a connecting hole 11 is formed at one end of the feeding tooth body 10 near the feeding auxiliary tooth 30, and the axis of the connecting hole 11 is set along the feeding direction; a mounting block 40 is fixedly connected to one side of the bottom end of the feeding main tooth 20, and an adjustment slot 41 that matches the connecting hole 11 is formed on the mounting block 40. The length of the adjustment slot 41 is greater than the width of the slot, and an adjustment screw 50 is installed in the adjustment slot 41. The end of the adjustment screw 50 passes through the adjustment slot 41 and is threaded into the connecting hole 11, so that the feeding main tooth 20 and the feeding tooth body 10 can be detachably fixedly connected by screwing the adjustment screw 50 in and out. At the same time, by adjusting the relative position of the feeding main tooth 20 and the adjustment screw 50, the distance between the upper surface of the feeding auxiliary tooth 30 and the upper surface of the feeding main tooth 20 can be adjusted.

[0049] More preferably, a vertical guide groove 12 is formed on the feed tooth body 10. The vertical guide groove 12 communicates with the connecting hole 11. The mounting block 40 is installed in the vertical guide groove 12, and the width of the mounting block 40 is equal to the width of the vertical guide groove 12, so that the mounting block 40 can rise or fall within the vertical guide groove 12, thereby ensuring that the horizontal distance between the feed auxiliary tooth 30 and the feed main tooth 20 remains constant.

[0050] An embodiment of a sewing machine includes the above-described feed tooth structure.

[0051] The working principle of the feeding tooth structure of this utility model is as follows:

[0052] like Figure 7 As shown, the presser foot 60 presses the fabric 80 onto the feed dog of the sewing machine, and the feed action is achieved by the back-and-forth movement of the feed dog. After the fabric 80 is folded, it is sewn. The needle 70 just pierces the edge of the folded part. The feed auxiliary dog ​​30 acts on the upper layer of fabric, and the feed main dog 20 acts on the lower layer of fabric. By adjusting the height of the feed auxiliary dog ​​30, the feeding efficiency of the upper layer of fabric can be increased, thereby compensating for the difference in feeding efficiency between the upper and lower layers and solving the problem of misalignment between upper and lower layers.

[0053] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0054] When performing hem stitching, the feeding efficiency of the upper fabric can be increased with simple adjustments, thereby compensating for the difference in feeding efficiency between the upper and lower layers, solving the problem of misaligned layers, and has the advantages of simple structure, low cost and easy adjustment, making it more acceptable to customers.

[0055] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A feed tooth structure, characterized by The utility model provides a feeding tooth structure, which comprises the following: a feeding tooth body (10); a feeding main tooth (20) arranged above the feeding tooth body (10); a feeding auxiliary tooth (30) arranged on one side of the feeding main tooth (20), the feeding auxiliary tooth (30) being connected with the feeding tooth body (10), and the upper surface of the feeding auxiliary tooth (30) being located above the upper surface of the feeding main tooth (20).

2. A feed dog structure according to claim 1 wherein, The spacing between the upper surface of the feeding auxiliary tooth (30) and the upper surface of the feeding main tooth (20) can be adjusted.

3. A feed dog structure according to claim 2, wherein The feeding auxiliary tooth (30) is detachably fixedly connected with the feeding tooth body (10).

4. A feed dog structure according to claim 3, wherein The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding auxiliary tooth (30) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11).

5. A feed dog structure according to claim 4 wherein, The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12).

6. The feed tooth structure of claim 2 wherein, The feeding main tooth (20) is detachably fixedly connected with the feeding tooth body (10).

7. A feed dog structure according to claim 6 wherein, The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding main tooth (20) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11).

8. A feed dog structure according to claim 7 wherein, The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12).

9. A sewing machine characterized by comprising: The utility model provides a feeding tooth structure, which comprises the following: a feeding tooth body (10); a feeding main tooth (20) arranged above the feeding tooth body (10); a feeding auxiliary tooth (30) arranged on one side of the feeding main tooth (20), the feeding auxiliary tooth (30) being connected with the feeding tooth body (10), and the upper surface of the feeding auxiliary tooth (30) being located above the upper surface of the feeding main tooth (20). The spacing between the upper surface of the feeding auxiliary tooth (30) and the upper surface of the feeding main tooth (20) can be adjusted. The feeding auxiliary tooth (30) is detachably fixedly connected with the feeding tooth body (10). The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding auxiliary tooth (30) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11). The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12). The feeding main tooth (20) is detachably fixedly connected with the feeding tooth body (10). The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding main tooth (20) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11). The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12). The utility model provides a feeding tooth structure, which comprises the following: a feeding tooth body (10); a feeding main tooth (20) arranged above the feeding tooth body (10); a feeding auxiliary tooth (30) arranged on one side of the feeding main tooth (20), the feeding auxiliary tooth (30) being connected with the feeding tooth body (10), and the upper surface of the feeding auxiliary tooth (30) being located above the upper surface of the feeding main tooth (20). The spacing between the upper surface of the feeding auxiliary tooth (30) and the upper surface of the feeding main tooth (20) can be adjusted. The feeding auxiliary tooth (30) is detachably fixedly connected with the feeding tooth body (10). The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding auxiliary tooth (30) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11). The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12). The feeding main tooth (20) is detachably fixedly connected with the feeding tooth body (10). The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding main tooth (20) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11). The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12). The utility model provides a feeding tooth structure, which comprises the following: a feeding tooth body (10); a feeding main tooth (20) arranged above the feeding tooth body (10); a feeding auxiliary tooth (30) arranged on one side of the feeding main tooth (20), the feeding auxiliary tooth (30) being connected with the feeding tooth body (10), and the upper surface of the feeding auxiliary tooth (30) being located above the upper surface of the feeding main tooth (20). The spacing between the upper surface of the feeding auxiliary tooth (30) and the upper surface of the feeding main tooth (20) can be adjusted. The feeding auxiliary tooth (30) is detachably fixedly connected with the feeding tooth body (10). The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding auxiliary tooth (30) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11). The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12). The feeding main tooth (20) is detachably fixedly connected with the feeding tooth body (10). The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding main tooth (20) is connected with a mounting block (40), the mounting block (40) is formed with an adjusting slot hole (41) matched with the connecting hole (11), the slot length of the adjusting slot hole (41) is greater than the slot width, and an adjusting screw (50) is mounted in the adjusting slot hole (41), and the end of the adjusting screw (50) is threadedly connected in the connecting hole (11). The feeding tooth body (10) is formed with a vertical guide slot (12), and the mounting block (40) is mounted in the vertical guide slot (12). The utility model provides a feeding tooth structure, which comprises the following: a feeding tooth body (10); a feeding main tooth (20) arranged above the feeding tooth body (10); a feeding auxiliary tooth (30) arranged on one side of the feeding main tooth (20), the feeding auxiliary tooth (30) being connected with the feeding tooth body (10), and the upper surface of the feeding auxiliary tooth (30) being located above the upper surface of the feeding main tooth (20). The spacing between the upper surface of the feeding auxiliary tooth (30) and the upper surface of the feeding main tooth (20) can be adjusted. The feeding auxiliary tooth (30) is detachably fixedly connected with the feeding tooth body (10). The feeding tooth body (10) is formed with a connecting hole (11), one end of the feeding auxiliary

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