A sewing machine based on double needle synchronization sewing

Abstract

The utility model discloses a kind of sewing machine based on double needle synchronous sewing, it is related to sewing equipment technical field, and it includes: workbench, the upside of workbench is fixedly connected with double-groove sewing plate, the upside of workbench is provided with double needle sewing machine, and double needle sewing machine is located in the side of double-groove sewing plate;Clamping cloth feeding assembly is set on the upside of one end of workbench.The utility model discloses a kind of sewing machine based on double needle synchronous sewing has the rotation of the two movable clamping plates in clamping cloth feeding assembly, so that the cloth being clamped is sent forward one end distance, since protruding wedge is only small distance, so that cloth intermittent delivery, under this action, it can be realized in sewing work only to the position of cloth just to be sewn is tensioned to eliminate horizontal wrinkle, and the part that has been sewn and the part that has not been sewn will not be subjected to tensioning force, so that the deformation condition of some elastic cloth can be avoided when processing, ensure product quality.

Description

Technical Field

[0001] This utility model relates to the field of sewing equipment technology, and in particular to a sewing machine based on double-needle synchronous sewing. Background Technology

[0002] A double-needle sewing machine is a specialized sewing device equipped with two needles and two bobbins, capable of sewing two parallel stitches in one go. It is mainly used to improve sewing efficiency, enhance the decorative effect of the stitches, and ensure a smooth and strong seam. It is widely used in garment manufacturing (such as topstitching on jeans and shirts), home textiles (such as duvet covers and curtains), and industrial fields such as bags and automotive interiors that require reinforcement and decorative sewing of thick or special fabrics.

[0003] When sewing fabric, it is often necessary to tension the fabric surface to remove wrinkles. However, existing sewing machines based on double-needle synchronous sewing keep the fabric in a state of tension during sewing, which causes some elastic fabrics to undergo irreversible deformation under prolonged tension, reducing the quality of the finished product. Utility Model Content

[0004] This utility model discloses a sewing machine based on double-needle synchronous sewing, which aims to solve the technical problem that double-needle synchronous sewing, due to continuous tension of the fabric, easily causes irreversible deformation of the elastic fabric, affecting the quality of the finished product.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a sewing machine based on double-needle synchronous sewing, comprising: a worktable, a double-groove sewing plate fixedly connected to the upper side of the worktable, a double-needle sewing machine disposed on the upper side of the worktable, the double-needle sewing machine being located on one side of the double-groove sewing plate; a fabric clamping and feeding assembly disposed on the upper side of one end of the worktable, the fabric clamping and feeding assembly being used to clamp and feed the fabric while tensioning the sewing part to eliminate transverse wrinkles; and a flattening assembly disposed on the upper side of the worktable away from the fabric clamping and feeding assembly, the flattening assembly being used to make the fabric surface smoother, and at the same time assisting the fabric clamping and feeding assembly in eliminating longitudinal wrinkles of the fabric through friction.

[0006] In a preferred embodiment, the clamping and feeding assembly includes: an L-shaped fixing plate, two L-shaped fixing plates fixedly connected to the upper side of one end of the workbench, the two L-shaped fixing plates being located on both sides of one end of the double-groove sewing board, and two connecting plates being equally spaced on the inner walls of the two L-shaped fixing plates, one of the connecting plates on the same L-shaped fixing plate being slidably connected to its inner wall; and two adjusting telescopic rods, two adjusting telescopic rods being respectively located on the upper side of the corresponding L-shaped fixing plate, the telescopic ends of the two adjusting telescopic rods being fixedly connected to the corresponding slidable connecting plates.

[0007] In a preferred embodiment, the clamping and feeding assembly further includes: toothed shafts, one end of each of the two toothed shafts being connected to a rotating hole on the upper side of a corresponding L-shaped fixed plate via bearings, and the other end being connected to the upper side of a worktable via bearings; a rotating gear being fixedly connected to the outer wall of one end of one of the toothed shafts; a rotary motor being fixedly connected to the upper side of one of the L-shaped fixed plates, and the drive end of the rotary motor being connected to one end of the corresponding toothed shaft via a coupling; a transmission shaft being connected to the upper side of another L-shaped fixed plate via bearings, and a transmission gear being fixedly connected to the outer wall of the transmission shaft; the transmission gear meshing with the rotating gear fixedly connected to the outer wall of one end of one of the toothed shafts; the upper outer wall of the transmission shaft and the upper outer wall of the other toothed shaft being provided with the same transmission belt; and fixed discs, multiple fixed discs being fixedly connected to one side of a corresponding connecting plate, two fixed discs on the same side being respectively fitted onto the outer wall of the corresponding toothed shaft, and protruding wedges being fixedly connected to the opposite sides of the two fixed discs on the same side, with the two protruding wedges located on the same vertical line.

[0008] In a preferred embodiment, the clamping and feeding assembly further includes: movable clamping plates, wherein multiple movable clamping plates are respectively and equally spaced on the outer wall of the corresponding toothed shaft, and the multiple movable clamping plates are respectively located between two corresponding fixed discs.

[0009] In a preferred embodiment, the clamping and feeding assembly further includes: rubber clamping blocks, wherein multiple rubber clamping blocks are respectively disposed on one side of the corresponding movable clamping plate, and two rubber clamping blocks located on the same vertical line are disposed opposite each other; rollers, wherein multiple rollers are respectively connected to the side of the corresponding movable clamping plate away from the rubber clamping blocks through bearings, and the multiple rollers are in rolling contact with the corresponding protruding wedge and the fixed disc; and telescopic springs, wherein two telescopic springs are respectively sleeved on the outer wall of the corresponding toothed shaft, and the two ends of the two telescopic springs are respectively fixedly connected to the opposite side of the two corresponding movable clamping plates.

[0010] In a preferred embodiment, the leveling component includes: a U-shaped frame, fixedly connected to the upper side of the worktable away from the clamping and feeding assembly, with two sliding holes equally spaced on the upper side of the U-shaped frame, and limit rods slidably connected inside the two sliding holes respectively, and the lower ends of the two limit rods being fixedly connected to the same U-shaped movable plate.

[0011] In a preferred embodiment, the leveling assembly further includes: compression springs, two compression springs respectively sleeved on the outer wall of the corresponding limiting rod, one end of the two compression springs being fixedly connected to the upper inner wall of the U-shaped frame, and the other end being fixedly connected to the upper side of the U-shaped movable plate; and a pressure roller, connected to the inside of the opening of the U-shaped movable plate via a bearing.

[0012] As can be seen from the above, the sewing machine based on double-needle synchronous sewing provided by this utility model utilizes the rotation of two movable clamping plates in the clamping and feeding assembly to deliver the clamped fabric forward a certain distance. Since the protruding wedge blocks only cover a short distance, the fabric is delivered intermittently. Under this action, it is possible to achieve tensioning only at the position where the fabric is to be sewn during sewing to eliminate lateral wrinkles, while the sewn and unsewn parts will not be subjected to tension. This can avoid deformation of some elastic fabrics during processing and ensure product quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a sewing machine based on double-needle synchronous sewing proposed in this utility model; Figure 2 A schematic diagram of the overall structure of the clamping and feeding assembly of a sewing machine based on double-needle synchronous sewing proposed in this utility model; Figure 3 A side view of the clamping and feeding assembly of a sewing machine based on double-needle synchronous sewing proposed in this utility model. Figure 4 This is an exploded structural diagram of the toothed shaft in the clamping and feeding assembly of a sewing machine based on double-needle synchronous sewing, as proposed in this utility model. Figure 5 This is a side view of the flattening component of a sewing machine based on double-needle synchronous sewing, as proposed in this utility model.

[0014] In the attached diagram: 1. Workbench; 2. Fabric clamping and feeding assembly; 201. L-shaped fixing plate; 202. Adjustable telescopic rod; 203. Rotary motor; 204. Transmission belt; 205. Transmission gear; 206. Transmission shaft; 207. Rotating gear; 208. Toothed shaft; 209. Raised wedge block; 210. Fixed disc; 211. Connecting plate; 212. Movable clamping plate; 213. Rubber clamping block; 214. Roller; 215. Telescopic spring; 3. Double needle sewing machine; 4. Flattening assembly; 401. U-shaped frame; 402. Limiting rod; 403. U-shaped movable plate; 404. Compression spring; 405. Pressure roller; 5. Double groove sewing plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] The sewing machine based on double-needle synchronous sewing disclosed in this utility model is mainly used in scenarios where double-needle synchronous sewing, due to continuous tension of the fabric, easily causes irreversible deformation of the elastic fabric, affecting the quality of the finished product.

[0017] Reference Figure 1 A sewing machine based on double-needle synchronous sewing includes: a worktable 1, a double-groove sewing plate 5 fixedly connected to the upper side of the worktable 1, a double-needle sewing machine 3 disposed on the upper side of the worktable 1, the double-needle sewing machine 3 being located on one side of the double-groove sewing plate 5; a clamping and feeding assembly 2, disposed on the upper side of one end of the worktable 1, the clamping and feeding assembly 2 being used to clamp and feed the fabric while tensioning the sewing part to eliminate transverse wrinkles; and a flattening assembly 4, disposed on the upper side of the end of the worktable 1 away from the clamping and feeding assembly 2, the flattening assembly 4 being used to make the fabric surface smoother, while simultaneously using friction to assist the clamping and feeding assembly 2 in eliminating longitudinal wrinkles of the fabric.

[0018] Reference Figures 1-4 In a preferred embodiment, the clamping and feeding assembly 2 includes: an L-shaped fixing plate 201, two L-shaped fixing plates 201 are fixedly connected to one upper side of the workbench 1, the two L-shaped fixing plates 201 are respectively located on one side of one end of the double groove sewing board 5, and two connecting plates 211 are equally spaced on the inner walls of the two L-shaped fixing plates 201, one of the connecting plates 211 located on the same L-shaped fixing plate 201 is slidably connected to its inner wall; and two adjusting telescopic rods 202, two adjusting telescopic rods 202 are respectively located on the upper side of the corresponding L-shaped fixing plate 201, and the telescopic ends of the two adjusting telescopic rods 202 are respectively fixedly connected to the corresponding slidable connecting plate 211.

[0019] In this solution, the clamping and feeding assembly 2 further includes: toothed shafts 208, one end of each of the two toothed shafts 208 being connected to the interior of a rotating hole on the upper side of a corresponding L-shaped fixed plate 201 via bearings, and the other end being connected to the upper side of the worktable 1 via bearings; a rotating gear 207 is fixedly connected to the outer wall of one end of one of the toothed shafts 208; a rotary motor 203, fixedly connected to the upper side of one of the L-shaped fixed plates 201, the drive end of the rotary motor 203 being connected to one end of the corresponding toothed shaft 208 via a coupling; and a transmission shaft 206, connected to the upper side of the other L-shaped fixed plate 201 via bearings, the outer wall of the transmission shaft 206 being fixed. A transmission gear 205 is connected, which meshes with a rotating gear 207 fixedly connected to one end of the outer wall of a toothed shaft 208. The upper outer wall of the transmission shaft 206 and the upper outer wall of the other toothed shaft 208 are provided with the same transmission belt 204. Fixed discs 210 are fixedly connected to one side of the corresponding connecting plate 211. Two fixed discs 210 located on the same side are respectively sleeved on the outer wall of the corresponding toothed shaft 208. Two fixed discs 210 located on the same side are respectively fixedly connected to the opposite side of the two fixed discs 210 on the same side. The two protruding wedges 209 are located on the same vertical line.

[0020] In this solution, the clamping and feeding assembly 2 also includes: a movable clamping plate 212, multiple movable clamping plates 212 are respectively and equally spaced on the outer wall of the corresponding toothed shaft 208, and multiple movable clamping plates 212 are respectively located between two corresponding fixed discs 210.

[0021] In this solution, the clamping and feeding assembly 2 further includes: rubber clamping blocks 213, multiple rubber clamping blocks 213 are respectively disposed on one side of the corresponding movable clamping plate 212, and two rubber clamping blocks 213 located on the same vertical line are disposed opposite each other; rollers 214, multiple rollers 214 are respectively connected to the side of the corresponding movable clamping plate 212 away from the rubber clamping blocks 213 by bearings, and multiple rollers 214 are in rolling contact with the corresponding protruding wedge block 209 and the fixed disc 210; and telescopic springs 215, two telescopic springs 215 are respectively sleeved on the outer wall of the corresponding toothed shaft 208, and the two ends of the two telescopic springs 215 are respectively fixedly connected to the opposite side of the two corresponding movable clamping plates 212.

[0022] During sewing, the distance between the two sets of fixed discs 210 is adjusted by the action of two adjusting telescopic rods 202, thus accommodating fabrics of different thicknesses. Due to the obstruction of the two protruding wedges 209, the two opposing movable clamping plates 212 overcome the action of the telescopic springs 215 and move closer to each other, thereby clamping the edges of the fabric with the two rubber clamping blocks 213. As the two movable clamping plates 212 rotate, the clamped fabric is delivered forward a certain distance. Since the protruding wedges 209 only cover a short distance, the fabric is delivered intermittently. Under this action, it is possible to achieve tension only on the part of the fabric to be sewn during sewing to eliminate lateral wrinkles, while the sewn and unsewn parts are not subjected to tension force, thus avoiding deformation of some elastic fabrics during processing and ensuring product quality.

[0023] Reference Figure 1 and Figure 5 In a preferred embodiment, the leveling component 4 includes: a U-shaped frame 401, which is fixedly connected to the upper side of the workbench 1 away from the clamping and feeding component 2. Two sliding holes are equally spaced on the upper side of the U-shaped frame 401. Limiting rods 402 are slidably connected inside the two sliding holes respectively. The lower ends of the two limiting rods 402 are fixedly connected to the same U-shaped movable plate 403.

[0024] In this scheme, the leveling component 4 also includes: compression springs 404, two compression springs 404 are respectively sleeved on the outer wall of the corresponding limiting rods 402, one end of the two compression springs 404 is fixedly connected to the upper inner wall of the U-shaped frame 401, and the other end is fixedly connected to the upper side of the U-shaped movable plate 403; pressure rollers 405 are connected to the inside of the opening of the U-shaped movable plate 403 through bearings.

[0025] In use, the fabric is first placed on the double-groove sewing board 5, and then the first end of the fabric is passed between the two sets of movable clamping plates 212, while the last end of the fabric is passed under the pressure roller 405. The pressure roller 405 is pressed against the fabric surface by the two compression springs 404. When the fabric is delivered intermittently, the fabric is pulled at the last end due to the action of the pressure roller 405 and the pressure friction, which can eliminate longitudinal wrinkles of the fabric, thereby improving sewing efficiency. In addition, the compression of the pressure roller 405 makes the fabric surface smoother and ensures product quality.

[0026] Working principle: In use, the fabric is first placed on the double-groove sewing plate 5. Then, the first end of the fabric is passed between the two sets of movable clamping plates 212, while the last end passes under the pressure roller 405. The pressure roller 405 is pressed against the fabric surface by the two compression springs 404. At the same time, the distance between the two sets of fixed discs 210 can be adjusted by the two adjusting telescopic rods 202, so as to adapt to the processing of fabrics of different thicknesses. When sewing is performed, the double-needle sewing machine 3 works, and at the same time, the rotary motor 203 drives the machine to operate. One of the toothed shafts 208 rotates, while the transmission gear 205 on the transmission belt 204 and transmission shaft 206 meshes with the rotating gear 207 on the other toothed shaft 208. This allows the two toothed shafts 208 to rotate in opposite directions at the same speed. Since each set of movable clamping plates 212 is fitted onto the outer wall of the corresponding toothed shaft 208, the movable clamping plates 212 can slide up and down while rotating with the toothed shaft 208. Due to the action of the protruding wedges 209 on the fixed disk 210, it is possible to achieve [the desired effect] whenever [the disk is located at a certain position]. When two opposing movable clamping plates 212 on the same toothed shaft 208 rotate to the corresponding protruding wedges 209, the obstruction of the two protruding wedges 209 causes the two opposing movable clamping plates 212 to overcome the action of the telescopic spring 215 and move closer to each other, thereby causing the two rubber clamping blocks 213 to clamp the edge of the fabric. As the two movable clamping plates 212 rotate, the clamped fabric is delivered forward a certain distance. Since the protruding wedges 209 only travel a short distance, the fabric is delivered intermittently. Under this action, it is possible to achieve the desired effect during sewing work. The tension is applied only to the area of ​​the fabric to be sewn to eliminate horizontal wrinkles, while the sewn and unsewn areas are not subjected to tension. This avoids deformation of elastic fabrics during processing, ensuring product quality. During intermittent fabric delivery, the pressure roller 405 applies pressure and friction to the fabric, resulting in a pull at the tail end that eliminates longitudinal wrinkles, thus improving sewing efficiency. The pressure of the pressure roller 405 also makes the fabric surface smoother, ensuring product quality.

[0027] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A sewing machine based on double-needle synchronous sewing, characterized in that, include: A workbench (1) is fixedly connected to a double-groove sewing board (5) on the upper side of the workbench (1). A double-needle sewing machine (3) is set on the upper side of the workbench (1). The double-needle sewing machine (3) is located on one side of the double-groove sewing board (5). A clamping and feeding assembly (2) is set on the upper side of one end of the workbench (1). The clamping and feeding assembly (2) is used to clamp and feed the fabric while tensioning the sewing part to eliminate transverse wrinkles. A flattening assembly (4) is set on the upper side of the end of the workbench (1) away from the clamping and feeding assembly (2). The flattening assembly (4) is used to make the fabric surface flatter and at the same time, it assists the clamping and feeding assembly (2) in eliminating longitudinal wrinkles of the fabric through friction.

2. A sewing machine based on double-needle synchronous sewing according to claim 1, characterized in that, The clamping and feeding assembly (2) includes: an L-shaped fixing plate (201), two L-shaped fixing plates (201) are fixedly connected to the upper side of one end of the workbench (1), the two L-shaped fixing plates (201) are respectively located on both sides of one end of the double groove sewing board (5), and two connecting plates (211) are equally spaced on the inner wall of the two L-shaped fixing plates (201), and one of the connecting plates (211) located on the same L-shaped fixing plate (201) is slidably connected to its inner wall; and two adjusting telescopic rods (202), two adjusting telescopic rods (202) are respectively set on the upper side of the corresponding L-shaped fixing plate (201), and the telescopic ends of the two adjusting telescopic rods (202) are respectively fixedly connected to the corresponding slidable connecting plate (211).

3. A sewing machine based on double-needle synchronous sewing according to claim 2, characterized in that, The clamping and feeding assembly (2) further includes: toothed shafts (208), one end of each of the two toothed shafts (208) being connected to the interior of a rotating hole on the upper side of a corresponding L-shaped fixed plate (201) via bearings, and the other end being connected to the upper side of the worktable (1) via bearings; a rotating gear (207) being fixedly connected to the outer wall of one end of one of the toothed shafts (208); a rotary motor (203), fixedly connected to the upper side of one of the L-shaped fixed plates (201), the drive end of the rotary motor (203) being connected to one end of the corresponding toothed shaft (208) via a coupling; and a transmission shaft (206), connected to the upper side of the other L-shaped fixed plate (201) via bearings, the outer wall of the transmission shaft (206) being fixedly connected to a rotating gear (207). The transmission gear (205) meshes with a rotating gear (207) that is fixedly connected to one end of the outer wall of one of the toothed shafts (208). The upper outer wall of the transmission shaft (206) and the upper outer wall of the other toothed shaft (208) are provided with the same transmission belt (204). The fixed discs (210) are fixedly connected to one side of the corresponding connecting plate (211). The two fixed discs (210) on the same side are respectively sleeved on the outer wall of the corresponding toothed shaft (208). The two fixed discs (210) on the same side are respectively fixedly connected to the opposite side of the two fixed discs (210) on the same side. The two protruding wedges (209) are located on the same vertical line.

4. A sewing machine based on double-needle synchronous sewing according to claim 3, characterized in that, The clamping and feeding assembly (2) further includes: a movable clamping plate (212), multiple movable clamping plates (212) are respectively and equally spaced on the outer wall of the corresponding toothed shaft (208), and multiple movable clamping plates (212) are respectively located between two corresponding fixed discs (210).

5. A sewing machine based on double-needle synchronous sewing according to claim 4, characterized in that, The clamping and feeding assembly (2) further includes: rubber clamping blocks (213), multiple rubber clamping blocks (213) are respectively disposed on one side of the corresponding movable clamping plate (212), and two rubber clamping blocks (213) located on the same vertical line are disposed opposite each other; rollers (214), multiple rollers (214) are respectively connected to the side of the corresponding movable clamping plate (212) away from the rubber clamping blocks (213) through bearings, and multiple rollers (214) are in rolling contact with the corresponding protruding wedge (209) and the fixed disc (210); telescopic springs (215), two telescopic springs (215) are respectively sleeved on the outer wall of the corresponding toothed shaft (208), and the two ends of the two telescopic springs (215) are respectively fixedly connected to the opposite side of the two corresponding movable clamping plates (212).

6. A sewing machine based on double-needle synchronous sewing according to claim 1, characterized in that, The leveling component (4) includes: a U-shaped frame (401), which is fixedly connected to the upper side of the workbench (1) away from the clamping and feeding component (2). Two sliding holes are equally spaced on the upper side of the U-shaped frame (401), and limit rods (402) are slidably connected inside the two sliding holes respectively. The lower ends of the two limit rods (402) are fixedly connected to the same U-shaped movable plate (403).

7. A sewing machine based on double-needle synchronous sewing according to claim 6, characterized in that, The leveling component (4) further includes: compression springs (404), two compression springs (404) are respectively sleeved on the outer wall of the corresponding limiting rod (402), one end of the two compression springs (404) is fixedly connected to the upper inner wall of the U-shaped frame (401), and the other end is fixedly connected to the upper side of the U-shaped movable plate (403); pressure roller (405), which is connected to the inside of the opening of the U-shaped movable plate (403) through a bearing.

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