Fabric correction equipment for sewing machines

Abstract

The present invention discloses a fabric correction device for a sewing machine, wherein the second deflection correction and feeding auxiliary device is located beside the first deflection correction and feeding auxiliary device, the second deflection correction and feeding auxiliary device is fixed on a slider of a lateral translation driving mechanism, the first deflection correction and feeding auxiliary device and the second deflection correction and feeding auxiliary device both include a fabric deflection correction mechanism, the fabric deflection correction mechanism includes a second rotary driving device, a first rotary driving device and a deflection correction head, the deflection correction head includes a cavity and a deflection correction wheel mounting area located on the outer peripheral surface of the deflection correction head, a mounting hole is provided on the deflection correction wheel mounting area, a gear is rotatably mounted in the mounting hole, a screw is provided in the cavity, and the gear meshes with the screw, at least a part of the gear extends out of the mounting hole, the first rotary driving device is connected to the screw, and the second rotary driving device is connected to the deflection correction head. The sewing effect is improved, and the automatic deflection correction improves the sewing efficiency, and reduces the labor cost and labor intensity.

Description

Technical Field

[0001] The invention relates to the technical field of auxiliary devices applied to sewing machines, in particular to a cloth correction device applied to sewing machines. Background Art

[0002] At present, when the edge of a tubular fabric is sewn to the edge of other fabrics, manual correction and alignment are generally performed. However, the manual operation efficiency is low, so that more manpower is required for large-scale processing, resulting in high labor costs, high labor intensity, and poor correction effect. As a result, large sewing position deviations often occur, or leaks occur in some positions, resulting in an extremely low yield. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned technology and to design a cloth correction device for a sewing machine, and its specific structure is as follows.

[0004] The cloth correction device designed by the present invention for use in a sewing machine comprises a first deflection correction and feeding auxiliary device, a second deflection correction and feeding auxiliary device and a lateral translation driving mechanism, wherein the second deflection correction and feeding auxiliary device is located beside the first deflection correction and feeding auxiliary device, and the second deflection correction and feeding auxiliary device is fixed on a slider of the lateral translation driving mechanism, and the first deflection correction and feeding auxiliary device and the second deflection correction and feeding auxiliary device both comprise a cloth deflection correction mechanism, and the cloth deflection correction mechanism comprises a second rotation driving device, a first rotation driving device and a deflection correction mechanism. The deflection correcting head comprises a cavity and a deflection correcting wheel mounting area located on the outer peripheral surface of the deflection correcting head, one or more mounting holes connected to the cavity are arranged on the deflection correcting wheel mounting area, a gear is rotatably mounted in the mounting hole, a screw is arranged in the cavity, and the gear is meshed with the screw, at least a part of the gear extends out of the mounting hole, a first rotation driving device is connected to the screw, and a second rotation driving device is connected to the deflection correcting head, the deflection correcting head of the first deflection correcting and feeding auxiliary device is located above the sewing table of the sewing machine, and a roller is arranged beside the deflection correcting head of the second deflection correcting and feeding auxiliary device.

[0005] Preferably, it also includes a cloth feeding and conveying device, which is arranged on the sewing table of the sewing machine.

[0006] Preferably, the fabric feeding and conveying device includes a lifting plate body, a lifting drive device, a third motor, a belt transmission mechanism, and a driven feed wheel. The lifting drive device is fixed to the housing of the sewing machine, the lifting plate body is fixed to the lifting drive part of the lifting drive device, the third motor is fixed to the lifting plate body, and the belt transmission mechanism is installed on the third motor. The driven feed wheel is rotatably installed on the sewing table of the sewing machine, and the driven feed wheel is located below the belt transmission mechanism.

[0007] Preferably, the first rotation driving device includes a first motor and a rotating shaft arranged on the first motor, and the rotating shaft is fixedly connected to the screw.

[0008] Preferably, the second rotary drive device comprises a rotary sleeve, a transmission mechanism and a second motor. The rotary sleeve is sleeved on the rotary shaft, the deviation correction head is fixedly connected to the rotary sleeve, and the second motor is transmission-connected to the rotary sleeve via the transmission mechanism.

[0009] Preferably, it further comprises a base and a fixed sleeve, the fixed sleeve is sleeved on the rotating sleeve, one end of the fixed sleeve is fixed on the base, a positioning sleeve is provided on the end of the deviation correcting head, and the positioning sleeve is sleeved on the other end of the fixed sleeve, the inner wall of the positioning sleeve is in contact with the outer wall of the other end of the fixed sleeve, and the first motor and the second motor are both fixed on the base; or

[0010] The fixed sleeve is located between the rotating sleeve and the rotating shaft, and the first motor and the second motor are both fixed on the base.

[0011] Preferably, it also includes two brackets, a first rotation drive device and a second rotation drive device respectively installed on the two brackets, and the cloth deflection correction mechanism of the second deflection correction and feeding auxiliary device is installed on the second rotation drive device, the cloth deflection correction mechanism of the first deflection correction and feeding auxiliary device is installed on the first rotation drive device, and the slider of the transverse translation drive mechanism is fixedly connected to the bracket of the second deflection correction and feeding auxiliary device.

[0012] Preferably, the second rotation driving device includes a rotating shaft, a second lifting cylinder and a swing block. The second lifting cylinder is rotatably mounted on the bracket, the rotating shaft is rotatably mounted on the bracket, the swing block is fixed to one end of the rotating shaft, the piston rod of the second lifting cylinder is hinged to a pin shaft at one end of the swing block, and the rotating shaft is fixedly connected to the fabric deviation correction mechanism of the second deviation correction and feeding auxiliary device.

[0013] Preferably, the first rotating drive device includes a first lifting cylinder, a mounting frame is provided on the bracket, the middle part of the fabric deflection correction mechanism is rotatably mounted on the rotating mounting part of the mounting frame, the first lifting cylinder is rotatably mounted on the articulated frame or the bracket, and its piston rod is rotatably mounted on the fabric deflection correction mechanism of the first correction and feeding auxiliary device.

[0014] The fabric correction device designed by the present invention and applied to a sewing machine utilizes the forward and reverse rotation of a screw to drive the gear to rotate forward and reverse, and then corrects the fabric in contact with the gear to a predetermined position, so that the sewing machine can sew fabrics such as trouser legs in a horizontal straight line, thereby improving the sewing effect, making it less likely for the sewing position to deviate greatly or for a seam to be missed in some positions, and the automated correction improves the sewing efficiency and reduces the labor cost and labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure (I);

[0016] Figure 2 is a schematic diagram of the overall structure (II);

[0017] Figure 3 It is a schematic diagram of the overall structure with a sewing machine (I);

[0018] Figure 4 It is a schematic diagram of the overall structure with a sewing machine (II);

[0019] Figure 5 It is a schematic diagram of sewing feed;

[0020] Figure 6 It is a schematic diagram of the overall structure of the fabric deviation correction mechanism;

[0021] Figure 7 It is a schematic diagram of the overall structure of the fabric deviation correction mechanism (I);

[0022] Figure 8 2 is a schematic diagram of the overall structure of the fabric deviation correction mechanism. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0024] Example:

[0025] As shown in the accompanying drawings, the fabric correction device for a sewing machine described in this embodiment includes a workbench 300, a first deflection correction and feeding auxiliary device 100 fixed on the workbench 300, a second deflection correction and feeding auxiliary device 200 and a transverse translation driving mechanism 20 fixed on the workbench 300, the second deflection correction and feeding auxiliary device 200 is located beside the first deflection correction and feeding auxiliary device 100, the second deflection correction and feeding auxiliary device 200 is fixed on a slider 201 of the transverse translation driving mechanism 20, the first deflection correction and feeding auxiliary device 100 and the second deflection correction and feeding auxiliary device 200 both include a fabric deflection correction mechanism 10, the fabric deflection correction mechanism 10 includes a second rotation driving device 5, a first rotation driving device 4 and a deflection correction head 1, the deflection correction head 1 includes a cavity 11 and a deflection correction wheel mounting area 14 located on the outer peripheral surface of the deflection correction head 1, and a deflection correction wheel mounting area 14 is provided with a or a plurality of mounting holes 12 connected to the cavity 11, a gear 3 is rotatably mounted in the mounting hole 12, a screw 2 is arranged in the cavity 11, and the gear 3 is meshed with the screw 2, at least a part of the gear 3 extends out of the mounting hole 12, a first rotary drive device 4 is connected to the screw 2, a second rotary drive device 5 is connected to the deflection correcting head 1, the deflection correcting head 1 of the first deflection correcting and feeding auxiliary device is located above the sewing table of the sewing machine, a roller body 22 is arranged beside the deflection correcting head 1 of the second deflection correcting and feeding auxiliary device, wherein the roller body 22 and the deflection correcting head 1 of the first deflection correcting and feeding auxiliary device are arranged parallel to each other, an infrared sensor 21 is arranged above the roller body 22 and at the cutting knife of the sewing table 301 of the sewing machine 500, and a through hole 221 is arranged on the roller body 22 for the infrared light of the infrared sensor 21 to pass through, and when processing, two cylindrical cloths are arranged front and back on a processing table composed of a roller body and the sewing table of the sewing machine.

[0026] Preferably, the fabric feeding and conveying device 18 is further included, and the fabric feeding and conveying device 18 is arranged on the sewing table 301 of the sewing machine 500; the fabric feeding and conveying device 18 includes a lifting plate body 182, a lifting drive device 181, a third motor 183, a belt transmission mechanism, and a driven feed wheel 302, the lifting drive device 181 is fixed to the housing 186 of the sewing machine, the lifting plate body 182 is fixed to the lifting drive part of the lifting drive device 181, and the third motor 183 is fixed to the lifting plate body 182, and The belt transmission mechanism is installed on the third motor 183, the driven feed wheel is rotatably installed on the sewing table 301 of the sewing machine 500, and the driven feed wheel 302 is located below a transmission wheel 185 on the belt transmission mechanism, wherein the belt transmission mechanism includes four synchronous pulleys 185 and a synchronous belt 184 stretched in a trapezoidal shape, one synchronous pulley is fixedly connected to the rotating shaft of the third motor, two synchronous pulleys are rotatably installed at the two ends of the bottom of the lifting plate body through the rotating shaft, and the last synchronous pulley is located at the synchronous pulley on the third motor. The lifting drive device 181 adopts a lifting cylinder, and the piston rod of the lifting cylinder 181 descends to drive the lifting plate body to descend, so that the outer side of the synchronous belt 184 at the bottom of the lifting plate body 182 is in close contact with the fabric, and at the same time, the driven feed wheel 302 and the outer side of the synchronous belt 184 clamp the fabric together, and then the rolling wheel 305 is rotatably installed at the end of the sewing table 301 of the sewing machine 500, and a pressing device is provided at the end of the sewing table 301 of the sewing machine 500. 303, a clamping wheel 304 is rotatably mounted on the clamping device 303, and the roller wheel 305 is driven to rotate by the motor of the sewing machine 500, so that the rear cylindrical cloth is clamped between the rolling wheel and the clamping wheel, so that the rolling wheel drives the clamping wheel to rotate, and the synchronous belt movement drives the driven feeding wheel to rotate, so that the two cylindrical cloths are fed synchronously, so as to achieve the function of automatic feeding of cloth while the sewing machine automatically sews, so as to improve the sewing efficiency, wherein the clamping device can be a device for lifting and lowering the clamping wheel driven by a cylinder.

[0027] The second rotary drive device 5 is configured to drive the deflection correction head 1 to rotate, so that the fabric in contact with the gear 3 is fed in the direction of the sewing machine to improve the feeding efficiency. The second rotary drive device 5 may include only a motor or a motor and a rotating sleeve 53, so that the rotating shaft of the motor is fixedly connected to the deflection correction head 1, or the motor is fixedly connected to the deflection correction head 1 through the rotating sleeve 53.

[0028] When the second rotary drive device 5 is set, the correcting wheel mounting area 14 is an annular mounting area and can be set to one or more, and the multiple correcting wheel mounting areas are spaced apart from each other at equal intervals, and the multiple mounting holes are actually set to ten, and the number can be adjusted accordingly according to actual conditions and is not limited by the current description, and the ten mounting holes are arranged in a circular array in the correcting wheel mounting area, so that the ten gears are also arranged in a circular array, and its setting makes the correction and feeding effects better.

[0029] In this embodiment, the first rotation drive device 4 includes a first motor 41 and a rotating shaft 42 arranged on the first motor 41, and the rotating shaft 42 is fixedly connected to the screw 2, wherein the end of the rotating shaft 42 is inserted into the inner hole of the screw 2 and is fixedly connected by means of set screws or welding, so that the first motor 41 is started to drive the rotating shaft to rotate, thereby driving the screw to rotate.

[0030] In this embodiment, the second rotation driving device 5 includes a rotating sleeve 53, a transmission mechanism 52 and a second motor 51. The rotating sleeve 53 is sleeved on the rotating shaft 42. The correcting head 1 is fixedly connected to the rotating sleeve 53. The second motor 51 is connected to the rotating sleeve through the transmission mechanism 52. It is started by the second motor 51 and drives the rotating sleeve 53 to rotate through the transmission mechanism 52. After the rotating sleeve 53 rotates, the correcting head is rotated. The transmission mechanism 52 can adopt a synchronous belt transmission mechanism, a gear transmission mechanism or a chain transmission mechanism, and preferably a synchronous belt transmission mechanism. The synchronous transmission mechanism includes two synchronous pulleys 521 and a synchronous belt 522. The two synchronous pulleys 521 are respectively sleeved and fixed on the rotating shaft of the second motor 51 and the rotating sleeve 53, and the synchronous belt 522 is tensioned on the two synchronous pulleys 521.

[0031] In the case of setting a rotating sleeve, a base body 7 and a fixed sleeve body 6 can also be set. The fixed sleeve body 6 is sleeved on the rotating sleeve 53. A flange 61 at one end of the fixed sleeve body 6 is fixed to the base body 7 by bolts. A positioning sleeve 13 is provided at the end of the correcting head 1, and the positioning sleeve 13 is sleeved on the other end of the fixed sleeve body 6. The inner wall of the positioning sleeve 13 fits with the outer wall of the other end of the fixed sleeve body 6. The first motor 41 and the second motor 51 are both fixed on the base body 7. It can be seen that the rotating sleeve 53 is located between the fixed sleeve body 6 and the rotating shaft 42, and one end of the rotating sleeve 53 is inserted into the inner hole at the end of the correcting head 1 and fixedly connected by bolts or welding. In order to achieve the rotational stability of the rotating sleeve, a fixed bearing 8 is sleeved on the rotating sleeve 53, and the fixed sleeve body 6 is sleeved with a fixed bearing. It is fixed on the outer ring of the bearing 8, wherein the base 7 is only a plate body or a box body. When it is a plate body, there is a gap between the flange 61 at one end of the fixed sleeve body 6 and the plate body, and the bottom connecting block of the flange 61 is fixedly connected to the plate body by bolts, so that when the second motor 51 is only fixed on the plate body, the transmission mechanism and the rotating sleeve 53 at the gap are connected to each other through the transmission mechanism to achieve the rotation of the rotating sleeve 53, so as to drive the rotation of the deviation correcting head 1; when it is a box body, the transmission mechanism 52 is in the box body, and one end of the rotating sleeve 53 is inserted into the box body, so that when the second motor 51 is only fixed on the box body, the transmission mechanism 52 and the rotating sleeve 53 at one end of the rotating sleeve 53 in the box body are connected to each other through the transmission mechanism 52 to achieve the rotation of the rotating sleeve 53, so as to drive the rotation of the deviation correcting head 1.

[0032] Based on the above, a rotating sleeve 53, a base 7 and a fixed sleeve 6 are also set, and the fixed sleeve 6 can also be located between the rotating sleeve 53 and the rotating shaft 42, and the first motor 41 and the second motor 51 are both fixed on the base 7. It can be seen that the rotating sleeve 53 is located on the outside of the fixed sleeve 6, and the base 7 is only a plate body, so that the second motor 51 is only fixed on the plate body and then connected to the rotating sleeve 53 through the transmission mechanism 52 to achieve the rotation of the rotating sleeve 53, so as to drive the rotation of the deviation correction head 1. In order to achieve the rotation stability of the rotating sleeve 53, a fixed bearing 8 can be sleeved on the fixed sleeve 6, and the rotating sleeve is sleeved and fixed on the outer ring of the bearing 8.

[0033] In this embodiment, it also includes two brackets 9, a first rotation drive device 17 and a second rotation drive device 23 respectively installed on the two brackets 9, and the base 7 of the cloth deflection correction mechanism 10 at the second deflection correction and feeding auxiliary device 200 is installed on the second rotation drive device 23, the base 7 of the cloth deflection correction mechanism 10 at the first deflection correction and feeding auxiliary device 100 is installed on the first rotation drive device 7, and the slider of the lateral translation drive mechanism 20 is fixedly connected to the bracket 9 of the second deflection correction and feeding auxiliary device 200, wherein the lateral translation drive mechanism 20 adopts a lateral displacement servo slide or a screw slide, which are both currently known technologies and are composed of a servo motor, a screw and a linear guide rail, so they are not described in detail here; the roller body 22 is fixed to the bracket 9 by bolts or welding, and the roller body 22 is used in conjunction with a fixed roller or a fixed sewing table on the sewing machine.

[0034] In this embodiment, the second rotation driving device 23 includes a rotating shaft 172, a second lifting cylinder 174 and a swing block 173. The second lifting cylinder 174 is rotatably mounted on the bracket 9, the rotating shaft 172 is rotatably mounted on the bracket 9, the swing block 173 is fixed to one end of the rotating shaft 172, the piston rod of the second lifting cylinder 174 is hinged with a pin at one end of the swing block 173, and the rotating shaft 172 is fixedly connected to the cloth deviation correction mechanism 10, wherein two mounting blocks 175 corresponding to each other and spaced apart are fixed on the top of the bracket 9, and the two ends of the rotating shaft 172 are respectively inserted into the shaft holes 176 of the two mounting blocks 175. Thus, a rotational installation is performed, and a connecting sleeve 177 is provided on the base 7 of the fabric deflection correction mechanism 10, and the connecting sleeve 177 is fixed to the rotating shaft 172 by bolt sleeve connection. At this time, the piston rod of the second lifting cylinder 174 is extended and retracted to drive the swing block 173 to rotate, so that the rotating shaft 172 rotates to drive the fabric deflection correction mechanism 100 to lift up or lower, so that the deflection correction head 1 is lifted up or pressed down, and its rotation driving device 17 is preferably suitable for the second deflection correction and feeding auxiliary device 200, and the bracket 9 of the second deflection correction and feeding auxiliary device 200 is fixedly connected to the slider of the lateral translation driving mechanism 20 by bolts.

[0035] In this embodiment, the first rotation drive device 17 includes a first lifting cylinder 171, a mounting frame 91 is provided on the bracket 9, the middle part of the base of the cloth deflection correction mechanism 10 is rotationally mounted on the rotating mounting part of the mounting frame 91 through a rotating shaft, and the second lifting cylinder 174 is located in front of the rotating shaft of the base 7, the first lifting cylinder 171 is rotationally mounted on the articulated frame 91 or the bracket 9, and its piston rod is rotationally mounted on the cloth deflection correction mechanism 10, and the cloth deflection correction and feeding auxiliary device obtained by using the structure of the rotation drive device 17, wherein the deflection correction wheel mounting area 14 is only set to one, and the end of the piston rod is rotationally mounted on the front end of the base of the cloth deflection correction mechanism through a rotating shaft, so that the piston rod of the first lifting cylinder is lifted and lowered to drive the deflection correction head to lift up, or press down, and the bracket 9 of the first deflection correction and feeding auxiliary device 100 is fixed to the workbench 300 by bolts.

[0036] The working principle of the fabric deviation correction mechanism described in this embodiment is as follows: the first motor 41 drives the rotating shaft 42 to rotate and then drives the screw 2 to rotate forward and reversely. The screw 2 rotates to drive all the gears 3 to rotate forward and reversely, so as to push and pull the fabric on the sewing table and the roller body 22 back and forth respectively to adjust the position of the edge of the fabric strip. At the same time, the second motor 51 works and its rotating shaft rotates to drive the transmission mechanism 52 to work. The transmission mechanism 52 drives the rotating sleeve 53 to rotate to drive the deviation correction head 1 to rotate, so as to realize that the deviation correction head 1 rotates to assist in feeding while the gears pull the fabric to move to achieve the deviation correction function of the fabric edge. The first motor 41, the second motor 51, the third motor 183 and the infrared sensor 21 are all connected to and controlled by the PLC controller 400, wherein the fabric is pushed and pulled back and forth according to the top of the roller body 22 and the sewing table of the sewing machine. The infrared sensor 21 provided at the cutter drives and controls the forward and reverse rotation of the first motor 41, and when the cloth reaches the infrared range of the infrared sensor 21, the PLC controller 400 controls the first motor 41 to make the gear rotate in the opposite direction so that the edge of the cloth on the sewing table and the roller body 22 is away from the infrared range of the infrared sensor, and after being away, the PLC controller 400 controls the first motor 41 to make the gear rotate forward so that the edge of the cloth on the sewing table and the roller body 22 approaches and enters the infrared sensing range of the infrared sensor, thereby repeatedly pushing and pulling back and forth. The cloth at the sewing table is pushed and pulled back and forth to assist the sewing machine blade to cut the edge of the cloth to make the edge to be sewn smooth, and the cloth at the roller body is pushed and pulled back and forth to prevent the edge of the cloth from being excessively offset, thereby avoiding the skew phenomenon of the product after sewing, and further improving the sewing effect.

[0037] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A cloth correction device for a sewing machine, characterized in that: The invention comprises a first deflection correction and feeding auxiliary device (100), a second deflection correction and feeding auxiliary device (100) and a transverse translation driving mechanism (20), wherein the second deflection correction and feeding auxiliary device (200) is located beside the first deflection correction and feeding auxiliary device (100), and the second deflection correction and feeding auxiliary device (200) is fixed on a slider of the transverse translation driving mechanism (20), and the first deflection correction and feeding auxiliary device (100) and the second deflection correction and feeding auxiliary device (200) both comprise a cloth deflection correction mechanism (10), and the cloth deflection correction mechanism (10) comprises a second rotation driving device (5), a first rotation driving device (4) and a deflection correction head (1), and the deflection correction head (1) comprises a cavity (11) and a surface of the deflection correction head (1) disposed on the outer peripheral surface of the deflection correction head (1). The deflection correction wheel installation area (14) is provided on the surface, one or more installation holes (12) connected to the cavity (11) are provided on the deflection correction wheel installation area (14), a gear (3) is rotatably installed in the installation hole (12), a screw (2) is provided in the cavity (11), and the gear (3) is meshed with the screw (2), at least a part of the gear (3) protrudes from the installation hole (12), a first rotation drive device (4) is connected to the screw (2), and a second rotation drive device (5) is connected to the deflection correction head (1), the deflection correction head (1) of the first deflection correction and feeding auxiliary device (100) is located above the sewing table (301) of the sewing machine (500), and a roller body (19) is provided beside the deflection correction head (1) of the second deflection correction and feeding auxiliary device (200); It also comprises two brackets (9), a first rotation drive device (17) and a second rotation drive device (23) respectively mounted on the two brackets (9), wherein the cloth deflection correction mechanism (10) of the second deflection correction and feeding auxiliary device (200) is mounted on the second rotation drive device (23), the cloth deflection correction mechanism (10) of the first deflection correction and feeding auxiliary device (100) is mounted on the first rotation drive device (17), and the slider of the transverse translation drive mechanism (20) is fixedly connected to the bracket (9) of the second deflection correction and feeding auxiliary device (200); The second rotation driving device (23) comprises a rotation shaft (172), a second lifting cylinder (174) and a swing block (173); the second lifting cylinder (174) is rotationally mounted on the bracket (9); the rotation shaft (172) is rotationally mounted on the bracket (9); the swing block (173) is fixed to one end of the rotation shaft (172); a piston rod of the second lifting cylinder (174) is hingedly connected to a pin at one end of the swing block (173); and the rotation shaft (172) is connected to the second deviation correction and feeding auxiliary device (200 ) is fixedly connected to the cloth deflection correction mechanism (10) of the first deflection correction and feeding auxiliary device (100); the first rotation driving device (17) comprises a first lifting cylinder (171); a mounting frame (91) is provided on the bracket (9); the middle part of the cloth deflection correction mechanism (10) is rotatably mounted on the rotating mounting part of the mounting frame (91); the first lifting cylinder (171) is rotatably mounted on the mounting frame (91) or the bracket (9); and its piston rod is rotatably mounted on the cloth deflection correction mechanism (10) of the first deflection correction and feeding auxiliary device (100).

2. The cloth correction device for a sewing machine according to claim 1, characterized in that: It also includes a cloth feeding and conveying device (18), which is arranged on a sewing table (301) of the sewing machine (500).

3. The cloth correction device for a sewing machine according to claim 2, characterized in that: The fabric feeding and conveying device (18) comprises a lifting plate body (182), a lifting drive device (181), a third motor (183), a belt transmission mechanism, and a driven feed wheel (302); the lifting drive device (181) is fixed on a housing of a sewing machine (500); the lifting plate body (182) is fixed on a lifting drive portion of the lifting drive device (181); the third motor (183) is fixed on the lifting plate body (182); the belt transmission mechanism is mounted on the third motor (183); the driven feed wheel (302) is rotatably mounted on a sewing table (301) of the sewing machine (500); and the driven feed wheel (302) is located below the belt transmission mechanism.

4. The cloth correction device for a sewing machine according to any one of claims 1 to 3, characterized in that: The first rotary drive device (4) comprises a first motor (41) and a rotary shaft (42) arranged on the first motor (41); the rotary shaft (42) is fixedly connected to the screw rod (2).

5. The cloth correction device for a sewing machine according to claim 4, characterized in that: The second rotary drive device (5) comprises a rotary sleeve (53), a transmission mechanism (52) and a second motor (51); the rotary sleeve (53) is sleeved on the rotary shaft (42); the deviation correction head (1) is fixedly connected to the rotary sleeve (53); and the second motor (51) is transmission-connected to the rotary sleeve (53) via the transmission mechanism (52).

6. The cloth correction device for a sewing machine according to claim 5, characterized in that: The invention also comprises a base (7) and a fixed sleeve (6), wherein the fixed sleeve (6) is sleeved on the rotating sleeve (53), one end of the fixed sleeve (6) is fixed on the base (7), a positioning sleeve (13) is provided at the end of the deviation correction head (1), and the positioning sleeve (13) is sleeved on the other end of the fixed sleeve (6), and the first motor (41) and the second motor (51) are both fixed on the base (7); or the fixed sleeve (6) is located between the rotating sleeve (53) and the rotating shaft (42), and the first motor (41) and the second motor (51) are both fixed on the base (7).

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