CN216237620U - Cloth flattening assembly of cloth sewing machine - Google Patents

Abstract

The utility model discloses a cloth flattening component of a cloth sewing machine, relating to the technical field of sewing machines, and the technical scheme is as follows: the cloth pressing mechanism comprises two groups of cloth pressing mechanisms, wherein the two groups of cloth pressing mechanisms are arranged on a rack and are distributed up and down; the two groups of cloth pressing mechanisms respectively comprise pressing belts, a sliding frame capable of sliding along the sewing direction and cloth pressing wheels arranged on the sliding frame, one end of each of the two pressing belts is a limiting end, and the other end of each of the two pressing belts bypasses the cloth pressing wheels towards the two sides of the sewing position and forms an opening for sewing cloth; and a tensioned pressing part is formed between the limiting ends of the two press belts and the cloth pressing wheel, and the two pressing parts are used for pressing the two sides of the cloth and flattening the cloth. The utility model has good stability of cloth clamping and pressing, is convenient for flattening the fabric, keeps the fabric flat in the process of sewing, and can adapt to the sewing processing of various knitted and woven fabrics.

Description

Cloth flattening assembly of cloth sewing machine

Technical Field

The utility model relates to the technical field of sewing machines, in particular to a cloth flattening assembly of a cloth sewing machine.

Background

In the production process of textiles, after the cloth is woven, the cloth is often only short in length, and in order to facilitate processing of the cloth, the cloth needs to be sewn and connected to form cloth with longer length, so that subsequent processing of the cloth is facilitated. In order to improve the cloth seaming efficiency, a seaming machine is often used for seaming.

The cloth needs to be flattened in the working process of the sewing machine, the flattening effect is directly determined, and the smoothness of the whole cloth is ensured after the sewing machine is connected; for example, chinese utility model patent application with publication number CN110983743A discloses an automatic cloth receiving machine, which is to flatten two rolls of cloth through a cloth distributing assembly, so that the head and tail ends of the cloth can smoothly enter the seam area of the seaming machine to perform joint processing on the cloth.

However, in the existing technical scheme, the flattening effect of the equipment on the cloth is poor, and the cloth is easily wrinkled at the joint, so that the flatness of the cloth after the joint is affected.

Therefore, a new solution is needed to solve this problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a cloth flattening assembly of a cloth sewing machine, which has good cloth clamping stability and cloth flattening effect, improves the smoothness of cloth sewing, and can adapt to sewing processing of various knitted and woven cloth.

The technical purpose of the utility model is realized by the following technical scheme:

a cloth flattening assembly of a cloth sewing machine comprises two groups of cloth pressing mechanisms, wherein the two groups of cloth pressing mechanisms are arranged on a rack and are distributed up and down; the two groups of cloth pressing mechanisms respectively comprise pressing belts, a sliding frame capable of sliding along the sewing direction and cloth pressing wheels arranged on the sliding frame, one end of each of the two pressing belts is a limiting end, and the other end of each of the two pressing belts bypasses the cloth pressing wheels towards the two sides of the sewing position and forms an opening for sewing cloth; and a tensioned pressing part is formed between the limiting ends of the two press belts and the cloth pressing wheel, and the two pressing parts are used for pressing the two sides of the cloth and flattening the cloth.

The utility model is further provided with a sliding seat which is arranged on the frame in a sliding way and can slide along the direction of the sewing head, and the sliding frame of the lower cloth pressing mechanism is fixedly arranged on the sliding seat.

The utility model is further provided with a lifting frame and a lifting device, wherein the lifting frame is arranged on the rack in a vertically sliding manner and is driven by the lifting device; the sliding frame of the upper cloth pressing mechanism is arranged on the lifting frame in a sliding mode, and the sliding frame can slide up and down through a linkage device and are arranged in a sliding linkage mode along the position of the sewing head.

The utility model is further provided that a cross frame is arranged between the lifting frames, and the sliding frame at the upper side is connected with the cross frame in a sliding way through a plurality of pulleys.

The utility model is further arranged in that the linkage device comprises a linkage rod and a linkage seat, the linkage seat is connected with the linkage seat in a sliding manner in an up-and-down direction, one end of the linkage rod is fixedly arranged on the sliding seat, and the linkage seat is fixedly arranged on a sliding frame of the upper cloth pressing mechanism.

The utility model is further provided that the cloth pressing wheels in the two groups of cloth pressing mechanisms are staggered with each other; when the pressing parts of the two press belts are pressed, the cloth pressing wheel part of the cloth pressing mechanism on one side is pressed into the pressing part of the cloth pressing mechanism on the other side.

The utility model is further provided that the two groups of cloth pressing mechanisms comprise tension wheels, and the tension wheels are rotatably arranged on the corresponding sliding frames; the two press belts sequentially bypass the corresponding cloth pressing wheel and the corresponding tension wheel and are in a Z shape with the upside down.

The utility model is further arranged that two ends of the press belt are fixed and synchronously lift with the corresponding sliding frame; when the pressing parts of the two pressing belts press the cloth, the two ends of the pressing belts are parallel to the sewing head.

The cloth clamping mechanism comprises two clamping pieces in an open or cloth clamping state, and the distance between the two clamping pieces is adjustable.

The utility model is further arranged that the cloth clamping mechanism further comprises a cross bar arranged between the racks, the cross bar is parallel to the sliding direction of the sliding frame, and the clamping piece is connected to the cross bar in a lockable sliding manner.

In conclusion, the utility model has the following beneficial effects:

the press belts with two sets of flexibility are used for pressing and flattening the cloth, so that the smoothness of the end of the cloth can be improved, the pressing positions of the two press belts form a structure capable of being pushed to move, synchronous motion can be kept with the sewing process, the sewing position is always in a flattened state, and the sewing smoothness of the cloth is improved.

Drawings

FIG. 1 is a first perspective view of a progressive fabric-clamping quilting machine of the present invention;

FIG. 2 is a second perspective view of a progressive fabric-clamping end-sewing machine of the present invention;

FIG. 3 is a cross-sectional view of the cloth flattening assembly of the present invention;

FIG. 4 is a first schematic view of the cloth flattening assembly of the present invention;

FIG. 5 is a second schematic structural view of the cloth flattening assembly of the present invention;

FIG. 6 is a schematic diagram of a split structure of two cloth pressing mechanisms of the present invention;

FIG. 7 is a schematic view of a cloth pressing wheel for pressing two press belts according to the present invention;

FIG. 8 is a schematic structural view of the stitch mechanism of the present invention;

FIG. 9 is a schematic structural view of a cloth clamping mechanism of the present invention;

FIG. 10 is a schematic view of a clip according to the present invention;

fig. 11 is a schematic structural view of the weighing apparatus of the present invention.

Reference numerals: 1. a frame; 11. the position of the sewing head; 2. a cloth feeding end; 21. a first fabric; 22. a recessed structure; 221. a support roller; 222. a gap; 23. a weighing device; 231. a weighing seat; 232. a roller; 233. a weighing sensor; 234. a base; 235. a notch; 24. an ejection device; 241. a first telescopic rod; 242. an ejection frame; 3. a cloth outlet end; 31. a second fabric; 32. a cloth guide roller; 4. a cloth clamping mechanism; 41. a clamp; 411. a cloth clamping seat; 412. a cloth clamping plate; 413. a cloth clamping needle; 414. the cloth clamping is sunken; 42. a cross bar; 5. a head sewing mechanism; 51. a slide base; 511. a first slide rail; 52. a drive device; 521. a belt; 522. a motor; 53. sewing machine; 531. a second slide rail; 532. a fixing pin; 54. sewing the end; 55. a residual material recycling box; 551. an air duct; 552. a material receiving nozzle; 56. mounting a plate; 6. a cloth pressing mechanism; 61. pressing the belt; 611. a limiting end; 612. a tensioning end; 613. a pressing part; 614. an opening; 615. pressing the recess; 62. a carriage; 63. a cloth pressing wheel; 64. a tension wheel; 7. a lifting frame; 71. a third slide rail; 72. a cross frame; 73. a pulley; 74. a lifting device; 741. a second telescopic rod; 8. a linkage device; 81. a linkage rod; 82. a linkage seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

A progressive cloth-clamping sewing machine of the present embodiment, as shown in fig. 1-3, includes a frame 1, a cloth feeding end 2 for placing a first cloth 21 and a cloth discharging end 3 for placing a second cloth 31 are formed on the frame 1; a cloth clamping mechanism 4 and a sewing head mechanism 5 are arranged in the middle of the frame 1, and the cloth clamping mechanism 4 is used for clamping the ends of the first cloth 21 and the second cloth 31 at a sewing head position 11; the sewing mechanism 5 can slide along the sewing position 11, and the sewing mechanism 5 can slide along the sewing position 11 to sew the ends of the first fabric 21 and the second fabric 31. The cloth flattening assembly is arranged on the rack, the cloth can be clamped up and down through the cloth flattening assembly, the cloth can be flattened, and the smoothness of the sewn end of the cloth is kept.

Example two

The embodiment discloses a cloth flattening assembly, which is suitable for the cloth sewing machine in the first embodiment and is described with reference to fig. 4 to 10; including setting up two sets of cloth pressing mechanism 6 in frame 1, two sets of cloth pressing mechanism 6 are upper and lower distribution, can compress tightly the exhibition flat to first cloth 21 and second cloth 31 from upper and lower both sides, keep the cloth in the smoothness of seam head position 11 department, help the planarization after the seam head.

The two groups of cloth pressing mechanisms 6 respectively comprise a pressing belt 61, a sliding frame 62 and a cloth pressing wheel 63; the sliding frame 62 is arranged between the frames 1 in a sliding way, the sliding direction of the sliding frame is consistent with that of the sewing head mechanism 5, and the sliding frame keeps synchronous sliding; two cloth pressing wheels 63 are mounted on the two carriages 62 on the sides close to each other, respectively, to guide the press belt 61.

One end of the press belt 61 is a limiting end 611, the other end is a tensioning end 612, the limiting end 611 is fixedly installed, and the tensioning end 612 bypasses the cloth pressing wheel 63; wherein the upper side press belt 61 passes through the upper side cloth pressing wheel 63 upwards, and the lower side press belt 61 passes through the lower side cloth pressing wheel 63 downwards, and is tensioned at the tensioning end 612 by a tension wheel or other tensioning mechanisms, so as to keep the position between the limiting end 611 of the press belt 61 and the cloth pressing wheel 63 tight; a tensioned pressing part 613 is formed between the limiting end 611 of the two press belts 61 and the cloth pressing wheel 63, the two pressing parts 613 correspond to each other, and can press the first cloth 21 and the second cloth 31 from the upper side and the lower side to flatten the two cloths.

An opening 614 is formed at a position outside the two press belts 61 passing around the cloth presser 63, and the sewing mechanism 5 can sew at the opening 614 position. With the slippage of the sewing head mechanism 5, the carriage 62 and the cloth pressing wheel 63 can be synchronously driven to move, so that the positions of the pressing part 613 and the opening 614 for pressing the cloth by the two press belts 61 can be synchronously adjusted.

In the process of sewing, the sewing mechanism 5 presses the sewed cloth, the cloth to be sewn is pressed by the pressing part 613 of the pressing belt 61, and the position between the sewing mechanism 5 and the pressing part 613, namely the position of the opening 614, can be kept tensioned and flattened; and the position of the opening 614 can follow the movement as the stitch of the stitch mechanism 5 advances, so that the smoothness of the overall stitch position 11 can be maintained.

A slide seat 51 and a driving device are arranged on the machine frame, wherein the slide seat 51 is supported by a group of slide rails 511 between the machine frame 1 in a sliding way; the slider 51 can be mounted with a seaming machine 53 of the seaming mechanism 5, and when the slider 51 slides, the seaming machine 53 can be driven to synchronously slide to seam the cloth. The driving device 52 is installed on the frame 1, and linearly drives the frame 1, the driving device 52 may have various structures, and the sliding base 51 may be pushed to stably slide, for example, a belt 521 and a motor 522 may be adopted, the belt 521 is supported by a belt wheel and is driven to rotate by the motor 522, and then one position of the belt 521 is fixed on the sliding base 51, so as to drive the sliding movement of the sliding base 51.

The distance between the two cloth pressing mechanisms 6 can be adjusted, so that when the cloth is clamped, the two cloth pressing mechanisms 6 can be opened, the pressing parts 613 of the two press belts 61 are separated, and the first cloth 21 and the second cloth 31 can be conveniently placed between the two press belts 61; then, the two groups of cloth pressing mechanisms 6 can be closed, and the two press belts 61 are pressed with the first cloth 21 and the second cloth 31 to keep the smoothness of the cloth.

In the two groups of cloth pressing mechanisms 6, one group of cloth pressing mechanisms 6 can be subjected to lifting adjustment, and the other group of cloth pressing mechanisms 6 cannot be adjusted; for the convenience of operation, only the upper cloth pressing mechanism 6 is generally subjected to lifting adjustment, and the sliding frame 62 of the lower cloth pressing mechanism 6 is fixedly arranged on the sliding base 51, so that the sliding base 51 on the lower side can keep synchronous sliding movement with the sewing head mechanism 5; the carriage 62 of the upper cloth pressing mechanism 6 is also kept in lateral sliding synchronization with the slider 51 of the stitch head mechanism 5.

The cloth pressing mechanism 6 on the upper side is lifted and adjusted through a lifting frame 7, wherein the lifting frame 7 is installed through three sliding rails 71 on two sides of the rack 1 and can lift up and down; a lifting device 74 is arranged on the machine frame 1, the lifting device 74 is a second telescopic rod 741 driven by air power or electric power, and the telescopic end of the second telescopic rod 741 is connected to the lifting frame 7, so that the lifting frame 7 can be pushed up and down;

a cross frame 72 which is parallel to the sliding direction of the sliding base 51 is arranged between the lifting frames 7, four pulleys 73 are arranged in the upper sliding frame 62, and the four pulleys 73 are respectively rolled and pressed on the upper side and the lower side of the cross frame 72 so as to support the upper sliding frame 62 in a sliding way; the upper carriage 62 is interlocked by the interlocking device 8 in order to keep the upper carriage 62 slidable synchronously with the slide base 51 and also keep the upper carriage 62 slidable vertically and vertically;

the linkage device 8 comprises a linkage rod 81 and a linkage seat 82, and the linkage seat 82 is connected to the linkage seat 82 in a sliding manner in the vertical direction; the linkage rod 81 and the linkage seat 82 can be respectively arranged on the sliding seat 51 and the upper side sliding frame 62; for example, the lower end of the linkage rod 81 can be fixedly installed on the sliding base 51, the linkage seat 82 is installed on the upper sliding frame 62, and the linkage seat 82 is sleeved on the linkage rod 81 to form a vertical sliding guide, so that when the sewing head mechanism 5 slides along the sewing head position 11, the upper and lower sliding bases 51 can be driven to synchronously slide.

In order to improve the cloth pressing stability of the two press belts 61, the two cloth pressing wheels 63 can be staggered, when the pressing portions 613 of the two press belts 61 press the first cloth 21 and the second cloth 31, the part of the cloth pressing wheel 63 of the cloth pressing mechanism 6 on one side is pressed into the pressing portion 613 of the cloth pressing mechanism 6 on the other side, and excessive pressing with a certain range is performed to form a pressing recess 615; the cloth can be pressed stably at a position of the pressing portion 613 near the opening 614.

In the cloth pressing mechanism 6, the pressing belt 61 needs to be always kept in a tensioned state, and a tensioned component can be installed in the corresponding carriage 62; for example, a spiral spring may be installed in the carriage 62, and the tension end 612 may be installed on the spiral spring and elastically wound to form the tension of the push belt 61;

alternatively, both ends of the push belt 61 may be fixed, and both ends of the lower push belt 61 may be directly fixed to both sides of the frame 1; the upper press belt 61 can be fixed on the two sides of the lifting frame 7; the two ends of the push belt 61 are supported by a certain height difference in the vertical direction, and the distance between the two tensioning ends 612 is larger than the distance between the limiting ends 611; a tension wheel 64 is arranged on the corresponding carriage 62, the two tension wheels 64 are positioned at the upper side and the lower side of the sewing head position 11, and the two press belts 61 sequentially bypass the corresponding cloth pressing wheel 63 and the tension wheel 64 and are in a Z-shaped structure with the upside down; when the pressing portions 613 of the two pressing belts 61 press the two sides of the first fabric 21 and the second fabric 31, the two ends of the pressing belts 61 are parallel to the sewing head position 11, and the pressing positions of the pressing belts 61 can be adjusted in the sliding process of the sliding frame 62.

The cloth clamping mechanism 4 clamps the cloth in a manual mode and comprises two clamping pieces 41, wherein the clamping pieces 41 can be opened or closed, and the cloth can be clamped after the clamping pieces 41 are closed; the two clamping pieces 41 are slidably supported by a cross rod 42 between the frames 1 and can be adjusted along the seam head position 11, so that the distance between the two clamping pieces 41 is adjusted, and the two clamping pieces 41 are matched with each other to clamp the ends of the first cloth 21 and the second cloth 31 with different widths.

The clamp 41 comprises a cloth clamping seat 411 and a cloth clamping plate 412, wherein the cloth clamping seat 411 is connected to the cross rod 42 in a sliding mode and can be locked through bolts; the cloth clamping plate 412 is hinged to the cloth clamping plate 412, and the cloth clamping plate 412 can be pressed and limited through matching of the bolts and the pressing block. The cloth clamping needle 413 and the cloth clamping recess 414 with matched positions are arranged on the opposite surfaces of the cloth clamping seat 411 and the cloth clamping plate 412, so that the clamping stability of the clamping piece 41 to cloth can be improved.

EXAMPLE III

The embodiment discloses a sewing mechanism, which is suitable for a cloth sewing machine in the first embodiment, and is used in cooperation with a cloth flattening assembly in the second embodiment, and the description is given with reference to fig. 8;

the sewing machine comprises a sewing machine, a sliding seat for sliding support, a first sliding rail and a driving device, wherein the sliding seat, the first sliding rail and the driving device are shared with a part for mounting the sliding frame in the second embodiment; the sewing machine is installed on the sliding seat through the installation plate, forms a slidable structure and is installed between the racks, and when the sewing machine slides, the sewing machine can sew the first cloth and the second cloth.

In the stitching mechanism 5, the stitching machine 53 includes a stitching end 54, and the stitching end 54 is aligned with the opening 614 between the belts 61 to enable stitching of the fabric.

The sewing machine 53 is movable, and during the movement, the position of the sewing machine 53 can be adjusted, so that the sewing machine 53 and the sewing end 54 can slide away from the position near the sewing opening 614, and a relatively wide space is formed outside the sewing end 54, thereby facilitating the maintenance of the sewing machine 53.

For example, the seaming machine 53 may be mounted on a slide in a sliding manner. Two second sliding rails 531 which are arranged in parallel are installed on the sliding seat 51, and the second sliding rails 531 can be horizontal and are vertical to the first sliding rails 511; mounting the mounting plate slidably on the slide rail such that the mounting plate forms a slidable platform and may be locked by a securing pin 532; and then the sewing machine is arranged on the mounting plate, so that the sewing machine is arranged on the second sliding rail 531 in a sliding manner, and the sewing machine 53 can slide outwards to be away from the sewing position, so that the sewing machine can be conveniently overhauled and maintained.

The yarn guide frame is mounted on the mounting plate, yarns required in the sewing process can be mounted, the yarns can synchronously slide with the sewing machine, and the stability of the yarns in the adjusting process is kept.

The sewing machine 53 can also sew the cut first fabric 21 and second fabric 31 to excess the excess material beyond the sewing position 11 during sewing the first fabric 21 and second fabric 31; the existing sewing machine 53 has a cloth cutting function, or a cloth cutting machine can be installed on one side of the sewing machine 53 to cut the sewing excess materials, which is not described herein again;

in order to collect the excess materials generated after the sewing, an excess material recycling box 55 can be arranged on the sewing head mechanism 5, the excess material recycling box 55 is connected with a material receiving nozzle 552 through a flexible air pipe 551, and the material receiving nozzle 552 is arranged on the sewing machine 53 and faces the sewing end 54; and install negative-pressure air fan on clout collection box 55, can form negative pressure environment in the clout collection box 55 to can inhale the clout in the middle of clout collection box 55 through material receiving mouth 552, collect concentratedly.

The open and close bin gate is provided on the excess material recovery box 55, and the excess material in the excess material recovery box 55 can be removed after being collected to a certain degree.

Example four

The embodiment discloses a cloth feeding assembly for cloth, which is suitable for a cloth sewing machine in the first embodiment, and is described with reference to fig. 11; including the sunk structure who is used for bearing the weight of the cloth, sunk structure 22 is located the cloth feed end 2 of sewing machine, holds the first cloth 21 after beating the book through sunk structure 22. The concave structure 22 is formed by being surrounded by parallel supporting rollers 221 and is in a downward concave state; a large gap 222 is formed between the support rollers 221 at the bottom of the recess structure 22, and the width of the gap 222 is larger than that of the cloth roller of the first cloth 21.

After the joint of the cloth is finished, the cloth is guided by the cloth guide roller 32 and is output to the discharge end; after the first fabric 21 is completely rolled, the fabric roller in the first fabric 21 can fall from the gap 222 at the bottom of the concave structure 22, so as to facilitate the subsequent material supplement to the fabric feeding end 2.

In order to monitor the cloth splicing amount, a weighing device 23 can be arranged on one side of the concave structure 22 at the feeding end, and the length of the spliced first cloth 21 can be weighed through the weighing device 23, so that the approximate length of the first cloth 21 is obtained;

the weighing device 23 comprises a base 234, a weighing sensor 233 and a weighing seat 231, wherein the weighing sensor 233 is arranged between the base 234 and the weighing seat 231 and can weigh the weight of the cloth; the weighing seats 231 are of an intermittent distribution structure, a plurality of groups of weighing seats 231 are distributed along the width direction of the cloth, a recess capable of accommodating the first cloth 21 is formed in the upper part of each weighing seat 231, and a plurality of rollers 232 are arranged at the recessed position for supporting;

a gap 235 is formed among the weighing seats 231, an ejection device 24 is installed in the gap 235, the ejection device 24 comprises an arc-shaped ejection frame 242 and a first telescopic rod 241, one side of the ejection frame 242, which is close to the concave structure 22, is hinged on the machine frame 1, and the bottom of the other side of the ejection frame 242 is supported by the first telescopic rod 241, so that the ejection frame 242 can be lifted by adjusting the first telescopic rod 241; the roll of cloth on the weighing seat 231 can be pushed into the recessed structure 22 by the push-out frame 242, so that the first cloth 21 is supplemented.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (10)

1. A cloth flattening assembly of a cloth sewing machine is characterized by comprising two groups of cloth pressing mechanisms (6), wherein the two groups of cloth pressing mechanisms (6) are arranged on a rack (1) and are distributed up and down; the two groups of cloth pressing mechanisms (6) respectively comprise pressing belts (61), a sliding frame (62) capable of sliding along the sewing direction and cloth pressing wheels (63) arranged on the sliding frame (62), one end of each pressing belt (61) is a limiting end (611), the other end of each pressing belt bypasses the cloth pressing wheels (63) towards the two sides of the sewing position (11), and an opening (614) for sewing and connecting cloth is formed; and a tensioned pressing part (613) is formed between the limiting end (611) of the two press belts (61) and the cloth pressing wheel (63), and the two pressing parts (613) are used for pressing the two sides of the cloth and flattening the cloth.

2. The cloth flattening assembly of a cloth sewing machine according to claim 1, characterized by further comprising a sliding seat (51), wherein the sliding seat (51) is slidably mounted on the frame (1) and can slide along the sewing direction, and the sliding frame (62) of the lower cloth pressing mechanism (6) is fixedly mounted on the sliding seat (51).

3. The cloth flattening assembly of the cloth sewing machine of claim 2, characterized by further comprising a lifting frame (7) and a lifting device (74), wherein the lifting frame (7) is slidably mounted on the frame (1) up and down and is driven by the lifting device (74); the sliding frame (62) of the upper cloth pressing mechanism (6) is arranged on the lifting frame (7) in a sliding way, can slide up and down with the sliding seat (51) through a linkage device (8), and is arranged along the sewing head position (11) in a sliding linkage way.

4. Cloth flattening assembly of a cloth sewing machine according to claim 3, characterized in that a cross frame (72) is installed between the lifting frames (7), and the upper carriage (62) is slidably connected to the cross frame (72) through a plurality of pulleys (73).

5. The cloth flattening assembly of the cloth sewing machine of claim 3, characterized in that the linkage device (8) comprises a linkage rod (81) and a linkage seat (82), the linkage seat (82) is slidably connected to the linkage seat (82) in an up-and-down direction, one end of the linkage rod (81) is fixedly installed on the sliding seat (51), and the linkage seat (82) is fixedly installed on the sliding frame (62) of the upper cloth pressing mechanism (6).

6. The cloth flattening assembly of the cloth sewing machine according to claim 1, characterized in that the cloth pressing wheels (63) of the two groups of cloth pressing mechanisms (6) are staggered with each other; when the pressing parts (613) of the two press belts (61) are pressed, the cloth pressing wheel (63) of one cloth pressing mechanism (6) is partially pressed into the pressing part (613) of the other cloth pressing mechanism (6).

7. The cloth flattening assembly of a cloth sewing machine according to claim 1, characterized in that, two sets of cloth pressing mechanisms (6) each comprise a tension wheel (64), and the tension wheels (64) are rotatably mounted on the corresponding carriage (62); the two press belts (61) pass by the corresponding cloth pressing wheel (63) and the tension wheel (64) in turn and are in a Z shape with the upside down.

8. Cloth flattening assembly of a cloth sewing machine according to claim 7, characterized in that the press belt (61) is fixed at both ends and ascends and descends synchronously with the corresponding carriage (62); when the pressing parts (613) of the two press belts (61) press the cloth, the two ends of the press belts (61) are parallel to the sewing head position (11).

9. The cloth flattening assembly of a cloth sewing machine according to claim 1, characterized by further comprising a cloth clamping mechanism (4) for clamping the cloth between the pressing portions (613) of the two pressing belts (61), wherein the cloth clamping mechanism (4) comprises two clamping pieces (41) with an open or clamped state, and the distance between the two clamping pieces (41) is adjustable.

10. Cloth flattening assembly of a cloth sewing machine according to claim 9, characterized in that the cloth clamping mechanism (4) further comprises a cross bar (42) mounted between the frames (1), the cross bar (42) being parallel to the sliding direction of the carriage (62), the clamp (41) being lockably slidably connected to the cross bar (42).

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