Double-needle sewing machine

Abstract

The utility model discloses a double-needle sewing machine, which relates to the technical field of sewing machines and comprises a sewing machine body, a pressing rod and a needle rod are mounted below a machine head of the sewing machine body, a presser foot is mounted at the bottom of the pressing rod, a connecting seat is fixed at the bottom end of the needle rod, and a two-way screw is horizontally and rotatably arranged in the connecting seat. One end of the two-way screw extends out of the sewing machine body and is fixedly provided with a rotating handle, a strip-shaped rail is fixed to the position, above the two-way screw, in the connecting base, the two sides of the two-way screw are in threaded connection with adjusting nuts respectively, the top ends of the adjusting nuts are in sliding connection with the strip-shaped rail, and inserting grooves are formed in the bottom ends of the adjusting nuts. A machine needle is inserted into the slot; the needle adjusting device has the advantages that the distance between the two needles is adjusted by rotating the rotating handle, the limiting rod is clamped into the clamping groove in the rotating handle, self rotation of the two-way screw rod is avoided, and it is guaranteed that the distance between the two needles is kept unchanged.

Description

Technical Field:

[0001] The utility model relates to the technical field of sewing machines, and particularly relates to a double-needle sewing machine. Background Art:

[0002] A double-needle sewing machine, also called a double-needle flatbed sewing machine, is a commonly used sewing machine in which two needles sew synchronously in two or three steps, and the sewing effect is that two threads are juxtaposed and parallel to each other; the double-needle sewing machine has the advantages of high double-needle efficiency and beautiful parallel and regular double threads.

[0003] Chinese Patent Publication (Announcement) No. CN219991894U discloses an efficient double-needle sewing machine, belonging to the technical field of sewing machines, including a base. A sewing machine body is arranged at the upper end of the base. A needle bar is arranged at the lower end of the head of the sewing machine body. An installation seat is arranged at the lower end of the needle bar. An adjusting sewing needle assembly is arranged in the middle of the installation seat. A pressing bar is arranged on the side of the needle bar. A presser foot is arranged at the lower end of the pressing bar. The utility model is provided with an adjusting sewing needle assembly. By respectively screwing the first screw rod and the second screw rod, the first screw rod and the second moving seat move in the installation seat, and the positions of the sewing needles at the lower ends of the first moving seat and the second moving seat are changed. Observe the position of the limiting block moving on the scale line to determine the adjustment distance, which is convenient for precise sewing and improves the sewing efficiency; in the utility model, by clamping the block into the clamping groove and using the magnetic attraction between the second magnet block and the first magnet block, the presser foot and the pressing bar are quickly fixed, which is convenient for disassembly, replacement and portable use.

[0004] As shown in the accompanying drawings of the above-mentioned disclosed patent, during the adjustment process, the upper ends of the limiting block and others are in long-term contact with the inner wall of the installation seat, which is prone to wear, causing interference between the first moving seat and the second screw rod, and between the second moving seat and the first screw rod, resulting in the inclination of the sewing needle; and when the sewing machine is working, vibrations will occur, which will cause the screw rod to rotate by itself, and may cause the adjusted fixed distance between the two sewing needles to change, affecting the overall beauty of the sewing. Content of the Utility Model:

[0005] The purpose of the utility model is to provide a double-needle sewing machine to solve the problems raised in the above background art.

[0006] The utility model is implemented by the following technical solutions:

[0007] A double-needle sewing machine includes a sewing machine body. A pressing rod and a needle bar are installed under the head of the sewing machine body. A presser foot is installed at the bottom of the pressing rod. A connecting seat is fixed at the bottom end of the needle bar. A bidirectional screw is horizontally rotatably arranged in the connecting seat. One end of the bidirectional screw extends out of the outside of the sewing machine body and is fixed with a rotating handle. A strip-shaped track is fixed above the bidirectional screw in the connecting seat. Adjusting nuts are respectively threadedly connected to both sides of the bidirectional screw. The top end of the adjusting nut is slidably connected to the strip-shaped track. A slot is opened at the bottom end of the adjusting nut, and a sewing needle is inserted into the slot. A clamping bolt is threadedly connected to one side of the adjusting nut where the slot is located, and one end of the clamping bolt penetrates into the slot to clamp and fix the sewing needle. A limiting rod is hinged to the vertical surface of the connecting seat above the rotating handle, and the limiting rod is clamped with a clamping groove on the rotating handle.

[0008] Preferably, the rotating handle has a frustum structure, and a plurality of clamping grooves are evenly opened on its circumferential surface.

[0009] Preferably, a groove slidably matched with the strip-shaped track is opened on the top surface of the adjusting nut, and the strip-shaped track is placed in the groove.

[0010] Preferably, a scale value is engraved on one side surface of the bottom of the connecting seat, and an indicating block is fixed on one side of the adjusting nut, and the indicating block is located below the scale value.

[0011] Advantages of the present utility model: By rotating the rotating handle, the bidirectional screw rotates and drives the two adjusting nuts to move in opposite directions relatively, so as to realize adjusting the distance between the two sewing needles. By inserting the limiting rod into the clamping groove in the rotating handle, the self-rotation of the bidirectional screw is avoided, ensuring that the distance between the two sewing needles remains unchanged. Description of the drawings:

[0012] Figure 1 is a structural schematic diagram of the present utility model;

[0013] Figure 2 is Figure 1 a partial enlarged view of

[0014] Figure 3 is Figure 2 an internal cross-sectional view of

[0015] Figure 4 is Figure 3 a cross-sectional view at A in

[0016] In the figure: 1. Sewing machine body, 2. Pressing rod, 3. Needle bar, 4. Presser foot, 5. Connecting seat, 6. Bidirectional screw, 7. Rotating handle, 7.1. Card slot, 8. Strip-shaped track, 9. Adjusting nut, 9.1. Groove, 9.2. Indicator block, 10. Slot, 11. Machine needle, 12. Clamping bolt, 13. Limiting rod. Specific implementation manner:

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-4 , the present invention provides a technical solution for a double-needle sewing machine:

[0019] A double-needle sewing machine includes a sewing machine body 1. A pressing rod 2 and a needle bar 3 are installed under the head of the sewing machine body 1. A presser foot 4 is installed at the bottom of the pressing rod 2. A connecting seat 5 is fixed at the bottom end of the needle bar 3. A bidirectional screw 6 is horizontally rotatably arranged in the connecting seat 5. One end of the bidirectional screw 6 extends out of the outside of the sewing machine body 1 and is fixed with a rotating handle 7. A strip-shaped track 8 is fixed above the bidirectional screw 6 in the connecting seat 5. Adjusting nuts 9 are respectively threadedly connected to both sides of the bidirectional screw 6. In order to facilitate knowing the adjusted distance between the two machine needles 11, a scale value is engraved on the surface of one side of the bottom of the connecting seat 5. An indicator block 9.2 is fixed on one side of the adjusting nut 9. The indicator block 9.2 is located below the scale value. A groove 9.1 that is slidably matched with the strip-shaped track 8 is opened on the top surface of the adjusting nut 9. The strip-shaped track 8 is placed in the groove 9.1, so that the top end of the adjusting nut 9 is slidably connected to the strip-shaped track 8, avoiding the inclination of the machine needle 11 during the adjustment process and ensuring the stable movement of the adjusting nut 9; a slot 10 is opened at the bottom end of the adjusting nut 9. The machine needle 11 is inserted into the slot 10. A clamping bolt 12 is threadedly connected to one side of the adjusting nut 9 where the slot 10 is located. One end of the clamping bolt 12 penetrates into the slot 10 to clamp and fix the machine needle 11. A limiting rod 13 is hinged on the vertical surface of the connecting seat 5 above the rotating handle 7. The rotating handle 7 has a frustum structure, and a plurality of card slots 7.1 are evenly opened on its circumferential surface. The limiting rod 13 is clamped with the card slots 7.1 on the rotating handle 7.

[0020] The working principle is as follows: During the process of adjusting the distance between the two sewing needles 11, first take out the limit rod 13 from the card slot 7.1 in the rotary handle 7, then rotate the rotary handle 7, drive the two adjusting nuts 9 to move in opposite directions relative to each other by the rotation of the bidirectional screw rod 6, so as to realize the adjustment of the distance between the two sewing needles 11. Subsequently, insert the limit rod 13 into the card slot 7.1 in the rotary handle 7 again, thereby preventing the bidirectional screw rod 6 from rotating by itself and ensuring that the distance between the two sewing needles 11 remains unchanged.

[0021] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-needle sewing machine, comprising a sewing machine body (1), a pressing rod (2) and a needle bar (3) being mounted under the head of the sewing machine body (1), a presser foot (4) being mounted at the bottom of the pressing rod (2), characterized in that: A connecting seat (5) is fixed at the bottom end of the needle bar (3), a bidirectional screw (6) is horizontally rotatably arranged in the connecting seat (5), one end of the bidirectional screw (6) extends out of the outside of the sewing machine body (1) and is fixed with a rotating handle (7), a bar track (8) is fixed above the bidirectional screw (6) in the connecting seat (5), both sides of the bidirectional screw (6) are respectively threadedly connected with an adjusting nut (9), the top end of the adjusting nut (9) is slidably connected to the bar track (8), and the adjusting nut (9) is slidably connected to the bar track (8). A slot (10) is provided at the bottom end of the nut (9), and a machine needle (11) is inserted into the slot (10). The adjusting nut (9) is threadedly connected to a clamping bolt (12) on one side of the slot (10), and one end of the clamping bolt (12) is inserted into the slot (10) to clamp and fix the machine needle (11). A limit rod (13) is hingedly connected to the vertical surface of the connecting seat (5) above the rotating handle (7), and the limit rod (13) is clamped with the slot (7.1) on the rotating handle (7).

2. A double-needle sewing machine according to claim 1, characterized in that: The rotating handle (7) is in a truncated cone structure, and a plurality of slots (7.1) are evenly arranged on its circumferential surface.

3. A double-needle sewing machine according to claim 1, characterized in that: The top surface of the adjusting nut (9) is provided with a groove (9.1) which is slidably matched with the bar track (8), so that the bar track (8) is placed in the groove (9.1).

4. A double-needle sewing machine according to claim 1, characterized in that: A scale value is engraved on one side surface of the bottom of the connection seat (5), and an indicator block (9.2) is fixed on one side of the adjustment nut (9), and the indicator block (9.2) is located below the scale value.

Images