A sewing cloth tension control device and method based on a sewing machine

Abstract

The invention discloses a sewing cloth tension regulating device and method based on a sewing machine. The invention relates to the technical field of sewing machines, and comprises a cloth positioning disk for the sewing machine, wherein a slide rail mechanism is arranged inside the cloth positioning disk, and a tension control mechanism is arranged at the top of the slide rail mechanism, and the tension control mechanism comprises a cloth winding assembly and a cloth stretching assembly, wherein the cloth winding assembly is located on a side opposite to the cloth stretching assembly. The advantages of the invention are as follows: a tension sensor is arranged on one side of the surface of a mounting connection block, and a through hole inside the mounting connection block is matched with the front end of a transmission rod, so that the transmission rod drives the rotating drum assembly to rotate, and the cloth wrapped around the surfaces of the two drums is pulled while the drum rotates, and the tension of the cloth is detected, and then the first servo motor and the second servo motor are controlled by a staff, so as to achieve the effect of regulating the tension of the sewing cloth.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing machines, and in particular to a sewing cloth tension control device and method based on a sewing machine. Background Art

[0002] During the sewing process, proper control of fabric tension is crucial to sewing quality. Too low tension will cause the seam to loosen and drag, affecting the firmness and aesthetics of the sewing; while too high tension will easily cause the fabric to deform and wrinkle, affecting the smoothness and comfort of the sewing.

[0003] In the current existing technology, in the process of sewing cloth, most of the time, manual experience accumulation is used to control and adjust the tension of the cloth. This method requires workers to accumulate work for a long time to meet production needs, which leads to unqualified products in mass production. Therefore, we propose a sewing cloth tension control device and method based on a sewing machine. Summary of the invention

[0004] The object of the present invention is to provide a sewing cloth tension control device and method based on a sewing machine.

[0005] In order to solve the problems raised in the above background technology, the present invention provides the following technical solutions: a sewing cloth tension control device based on a sewing machine, comprising a cloth positioning disk for the sewing machine, a slide rail mechanism is arranged inside the cloth positioning disk, a tension control mechanism is arranged at the top of the slide rail mechanism, the tension control mechanism comprises a cloth winding assembly and a cloth stretching assembly, the cloth winding assembly is located on the side opposite to the cloth stretching assembly, the cloth winding assembly comprises a tension sensor, a mounting connection block, a first electric telescopic rod, a first servo motor, a baffle, a drum assembly and a transmission rod, a through hole adapted to the front end of the transmission rod is opened inside the mounting connection block, the inner wall of the drum assembly is fixedly mounted on the middle part of the surface of the transmission rod, the front end of the transmission rod passes through the through hole and is connected to the tension sensor, the rear end of the transmission rod is splined to the output end of the first servo motor, the surface of the first servo motor is fixedly mounted on the back of the baffle, and the front of the baffle is movably connected to the rear end of the drum assembly, the lower side of the front of the baffle is connected to the extended end of the first electric telescopic rod, and the base end of the first electric telescopic rod is fixedly mounted on the rear end of the mounting connection block;

[0006] The rotating drum assembly includes a drum body, an arc plate, a spring and an extrusion plate. The lower surface of the drum body is connected to the arc plate. Both sides of the top surface of the arc plate are connected to the bottom surface of the spring. The top surfaces of the two springs are connected to both sides of the top of the extrusion plate. Both sides of the bottom end of the extrusion plate are movably connected to the bottom of the arc plate through movable columns.

[0007] The slide rail mechanism includes a third electric telescopic rod, a fixing plate, a pulley and a connecting assembly, both ends of the connecting assembly are connected to the bottom ends of the two sets of third electric telescopic rods, the surfaces of the two sets of third electric telescopic rods are connected to the inner wall of the pulley, and the top ends of the two sets of third electric telescopic rods are connected to the bottom surface of the fixing plate;

[0008] The fabric positioning plate includes a plate body, a level detector, a support plate and a slide rail groove. The top surface of the plate body is respectively provided with a transverse groove and an arc groove. The level detector is fixedly mounted on the bottom end of the inner wall of the transverse groove. Both sides of the inner wall of the transverse groove are connected to the bottom surface of the support plate.

[0009] A slide rail adapted to the pulley is provided inside the arc-shaped groove, and the opposite area of ​​the abutment plate is clamped and fixed to the bottom of the sewing machine.

[0010] As a further solution of the present invention: the cloth stretching assembly includes a limit frame, a second servo motor, a driving rod, a roller, an extrusion block, a second electric telescopic rod and a pressure sensor, through holes adapted to the driving rod are opened below both sides of the inner wall of the limit frame, the inner wall of the roller is fixedly installed on the middle part of the surface of the driving rod, the front end of the driving rod passes through the through hole and is spline-connected to the output end of the second servo motor, the surface of the second servo motor is fixedly installed on one side of the outer surface of the limit frame, the extrusion block is arranged above the roller, the top surface of the extrusion block is connected to the extended end of the second electric telescopic rod, and the base end of the second electric telescopic rod passes through the top of the limit frame and is connected to the bottom end of the pressure sensor.

[0011] As a further solution of the present invention: the connecting assembly includes a connecting frame, a wire trough and a controller, the wire troughs are opened on both sides of the upper surface of the connecting frame, the controller is fixedly installed inside the connecting frame, the interior of the controller is linearly connected to the two groups of third electric telescopic rods through a power cord, and the power cord is adapted to the wire trough.

[0012] As a further solution of the present invention: the top ends of the two groups of the third electric telescopic rods are respectively connected to the fabric winding assembly and the fabric stretching assembly, and the fabric winding assembly and the fabric stretching assembly are on the same horizontal line.

[0013] A method for controlling the tension of sewing cloth based on a sewing machine, characterized in that it comprises the following steps:

[0014] Step 1: When in use, the fabric positioning plate can be connected to the thread guide plate below the sewing machine through the horizontal groove on the top surface, and then the two sides of the thread guide plate can be squeezed and fixed by the abutment plates on both sides of the inner wall of the horizontal groove, and then the level detector installed at the bottom end of the inner wall of the horizontal groove is started to detect the level between the plate body and the thread guide plate, so that the two are adjusted to the same horizontal plane;

[0015] Step 2: Then install the pulley and the two sets of third electric telescopic rods in the slide rail grooves opened on the top surface of the fabric positioning disk, and connect the bottom ends of the two sets of third electric telescopic rods to the two ends of the connecting frame, so that the two sets of third electric telescopic rods can rotate in opposite directions in the slide rail grooves, and then adjust the heights of the two sets of third electric telescopic rods through the controller and wire grooves provided inside the connecting frame, so that the heights of the two sets of third electric telescopic rods can be adapted according to the heights of the disk body and the wire guide plate, so as to better perform sewing;

[0016] Step 3: Then the staff installs the fabric winding assembly and the fabric stretching assembly above the two sets of third electric telescopic rods respectively, and then starts the first electric telescopic rod to pull the cylinder out of the through hole opened at the top of the installation connection block, and then winds the fabric between the extrusion plate and the arc plate, and drives the extrusion plate to extrude and fix the fabric through the spring, and then starts the first servo motor to wind the fabric. When the fabric is completely wound on the cylinder, the operator can pull out one end of the fabric, put it into the gap between the drum and the extrusion block, and extend it to the outside;

[0017] Step 4: Start the second electric telescopic rod to drive the squeezing block to move downward and squeeze the cloth to a certain extent. The pressure detector arranged above the second electric telescopic rod detects the pressure of squeezing the cloth, so that the operator can adjust the second electric telescopic rod according to the required tension, and then start the second servo motor to drive the rolling to rotate, thereby stretching the cloth;

[0018] Step 5: After the fabric is installed on the fabric winding assembly and the fabric stretching assembly, the operator observes the fabric tension in real time by observing the tension sensor, and adjusts and controls the first servo motor and the second servo motor to achieve control of the fabric tension.

[0019] By adopting the above technical solution, compared with the prior art, the beneficial effects of the present invention are:

[0020] The present invention arranges a tension sensor on one side of the surface of the mounting connection block, and the through hole inside the mounting connection block is adapted to the front end of the transmission rod, so that the rotating drum assembly is driven to rotate through the transmission rod. At the same time, the roller and the rotating drum assembly rotate at the same frequency, thereby pulling the cloth wrapped around the surfaces of both, and detecting the tension of the cloth. The first servo motor and the second servo motor are controlled by the staff, thereby achieving the effect of regulating the tension of the sewing cloth.

[0021] The present invention uses the arc plate and the extrusion plate arranged at the bottom of the cylinder, so that when the cloth is connected to the cylinder, one end of the cloth can be installed between the arc plate and the extrusion plate, and the extrusion plate is driven by the spring to squeeze the arc plate, so as to achieve the effect of quickly fixing one end of the cloth, and then the extrusion block and the second electric telescopic rod arranged on the upper part of the limit frame can achieve the effect of squeezing the other end of the cloth, which is convenient for operators to sew patterns on the cloth.

[0022] The present invention uses a pulley installed on the surface of the first electric telescopic rod and a slide rail groove starting from the top surface of the disc body to drive the cloth winding assembly and the cloth stretching assembly to adjust at different angles on the cloth positioning disc, and then uses a controller arranged inside the connecting frame to adjust the height of the two groups of third electric telescopic rods, so as to achieve the effect of controlling the distance between the cloth and the disc body and the thread guide plate, further facilitating the operator to sew. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of a cloth positioning plate in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of a connection component in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of a fixing plate in an embodiment of the present invention;

[0027] Figure 5 Schematic diagram of a cloth winding assembly in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of installing a connection block in an embodiment of the present invention;

[0029] Figure 7 Schematic diagram of a baffle in an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of a curved plate in an embodiment of the present invention;

[0031] Fig. 9 Schematic diagram of a roller in an embodiment of the present invention.

[0032] In the figure: 1, cloth positioning plate; 101, plate body; 102, level detector; 103, stop plate; 104, slide rail groove; 2, slide rail mechanism; 21, third electric telescopic rod; 22, fixing plate; 23, pulley; 24, connecting assembly; 241, connecting frame; 242, wire groove; 243, controller; 3, tension control mechanism; 31, cloth winding assembly; 311, tension sensor; 312, installation connection block; 313, the first An electric telescopic rod; 314, a first servo motor; 315, a baffle; 316, a rotating drum assembly; 3161, a drum body; 3162, an arc plate; 3163, a spring; 3164, an extrusion plate; 317, a transmission rod; 32, a fabric stretching assembly; 321, a limit frame; 322, a second servo motor; 323, a driving rod; 324, a roller; 325, an extrusion block; 326, a second electric telescopic rod; 327, a pressure sensor. DETAILED DESCRIPTION

[0033] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1, please refer to the attached Figure 1 -Attached Fig. 9 The present invention provides a technical solution: the sewing cloth tension control device based on the sewing machine comprises a cloth positioning disk 1 for the sewing machine, a slide rail mechanism 2 is arranged inside the cloth positioning disk 1, a tension control mechanism 3 is arranged at the top of the slide rail mechanism 2, the tension control mechanism 3 comprises a cloth winding assembly 31 and a cloth stretching assembly 32, the cloth winding assembly 31 is located on the side opposite to the cloth stretching assembly 32, the cloth winding assembly 31 comprises a tension sensor 311, a mounting connection block 312, a first electric telescopic rod 313, a first servo motor 314, a baffle 315, a drum assembly 316 and a transmission rod 317, the mounting connection block 312 A through hole is provided inside 12 to fit the front end of the transmission rod 317, the inner wall of the drum assembly 316 is fixedly mounted on the middle part of the surface of the transmission rod 317, the front end of the transmission rod 317 passes through the through hole and is connected to the tension sensor 311, the rear end of the transmission rod 317 is splined to the output end of the first servo motor 314, the surface of the first servo motor 314 is fixedly mounted on the back side of the baffle 315, and the front side of the baffle 315 is movably connected to the rear end of the drum assembly 316, the lower side of the front side of the baffle 315 is connected to the extended end of the first electric telescopic rod 313, and the base end of the first electric telescopic rod 313 is fixedly mounted on the rear end of the mounting connection block 312.

[0035] The transmission rod 317 is driven to rotate by the first servo motor 314, which in turn drives the cylinder 3161 to rotate. By winding the cloth around the surface of the cylinder 3161, resistance is generated between the cylinder 3161 and the transmission rod 317 during the stretching of the cloth. Since the interior of the tension sensor 311 is connected to the front end of the transmission rod 317, the tension of the cloth during the pulling process is detected in real time, and the cloth tension is regulated by the first servo motor 314 and the second servo motor 322.

[0036] In this embodiment, through the setting of the horizontal detector 102, the horizontal calibration between the disk body 101 and the wire guide plate can be performed, and the setting of the abutment plate 103 can facilitate the fixing of the disk body 101 on the wire guide plate. The fabric positioning disk 1 includes a disk body 101, a horizontal detector 102, an abutment plate 103 and a slide rail groove 104. The top surface of the disk body 101 is respectively penetrated by a transverse groove and an arc groove. The horizontal detector 102 is fixedly installed at the bottom end of the inner wall of the transverse groove, and both sides of the inner wall of the transverse groove are connected to the bottom surface of the abutment plate 103.

[0037] In this embodiment, a slide rail adapted to the pulley 23 is provided inside the arc-shaped groove, and the area opposite to the abutment plate 103 is clamped and fixed to the bottom of the sewing machine.

[0038] Specifically, the tension sensor 311 is arranged on one side of the surface of the mounting connection block 312, and the through hole inside the mounting connection block 312 is adapted to the front end of the transmission rod 317, so that the transmission rod 317 drives the rotating drum assembly 316 to rotate. At the same time, the roller 324 rotates at the same frequency as the rotating drum assembly 316, thereby pulling the fabric wrapped around the surfaces of both, and detecting the tension of the fabric. The staff then controls the first servo motor 314 and the second servo motor 322, thereby achieving the effect of regulating the tension of the sewing fabric.

[0039] Example 2, please refer to the attached Figure 1 -Attached Fig. 9The present invention provides a technical solution: the sewing cloth tension control device based on the sewing machine comprises a cloth positioning disk 1 for the sewing machine, a slide rail mechanism 2 is arranged inside the cloth positioning disk 1, a tension control mechanism 3 is arranged at the top of the slide rail mechanism 2, the tension control mechanism 3 comprises a cloth winding assembly 31 and a cloth stretching assembly 32, the cloth winding assembly 31 is located on the side opposite to the cloth stretching assembly 32, the cloth winding assembly 31 comprises a tension sensor 311, a mounting connection block 312, a first electric telescopic rod 313, a first servo motor 314, a baffle 315, a drum assembly 316 and a transmission rod 317, the mounting connection block 312 A through hole is provided inside 12 to fit the front end of the transmission rod 317, the inner wall of the drum assembly 316 is fixedly mounted on the middle part of the surface of the transmission rod 317, the front end of the transmission rod 317 passes through the through hole and is connected to the tension sensor 311, the rear end of the transmission rod 317 is splined to the output end of the first servo motor 314, the surface of the first servo motor 314 is fixedly mounted on the back side of the baffle 315, and the front side of the baffle 315 is movably connected to the rear end of the drum assembly 316, the lower side of the front side of the baffle 315 is connected to the extended end of the first electric telescopic rod 313, and the base end of the first electric telescopic rod 313 is fixedly mounted on the rear end of the mounting connection block 312.

[0040] In this embodiment, the rotating drum assembly 316 includes a cylinder body 3161, an arc plate 3162, a spring 3163 and an extrusion plate 3164. The lower surface of the cylinder body 3161 is connected to the arc plate 3162, both sides of the top surface of the arc plate 3162 are connected to the bottom surface of the spring 3163, the top surfaces of the two springs 3163 are connected to both sides of the top end of the extrusion plate 3164, and both sides of the bottom end of the extrusion plate 3164 are movably connected to the bottom of the arc plate 3162 through movable columns.

[0041] In this embodiment, the cloth stretching assembly 32 includes a limit frame 321, a second servo motor 322, a driving rod 323, a roller 324, an extrusion block 325, a second electric telescopic rod 326 and a pressure sensor 327. Through holes adapted to the driving rod 323 are provided below both sides of the inner wall of the limit frame 321. The inner wall of the roller 324 is fixedly mounted on the middle part of the surface of the driving rod 323. The front end of the driving rod 323 passes through the through hole and is spline-connected to the output end of the second servo motor 322. The surface of the second servo motor 322 is fixedly mounted on one side of the outer surface of the limit frame 321. The extrusion block 325 is arranged above the roller 324. The top surface of the extrusion block 325 is connected to the extended end of the second electric telescopic rod 326. The base end of the second electric telescopic rod 326 passes through the top of the limit frame 321 and is connected to the bottom end of the pressure sensor 327.

[0042] Specifically, through the arc plate 3162 and the squeezing plate 3164 arranged at the bottom of the cylinder 3161, when the cloth is connected to the cylinder 3161, one end of the cloth can be installed between the arc plate 3162 and the squeezing plate 3164, and the squeezing plate 3164 is driven by the spring 3163 to squeeze the arc plate 3162, so as to achieve the effect of quickly fixing one end of the cloth, and then through the squeezing block 325 and the second electric telescopic rod 326 arranged on the upper part of the limit frame 321, the other end of the cloth can be squeezed, which is convenient for the operator to sew patterns on the cloth.

[0043] Example 3, please refer to the attached Figure 1 -Attached Fig. 9 The present invention provides a technical solution: the sewing cloth tension control device based on the sewing machine comprises a cloth positioning disk 1 for the sewing machine, a slide rail mechanism 2 is arranged inside the cloth positioning disk 1, a tension control mechanism 3 is arranged at the top of the slide rail mechanism 2, the tension control mechanism 3 comprises a cloth winding assembly 31 and a cloth stretching assembly 32, the cloth winding assembly 31 is located on the side opposite to the cloth stretching assembly 32, the cloth winding assembly 31 comprises a tension sensor 311, a mounting connection block 312, a first electric telescopic rod 313, a first servo motor 314, a baffle 315, a drum assembly 316 and a transmission rod 317, the mounting connection block 312 A through hole is provided inside 12 to fit the front end of the transmission rod 317, the inner wall of the drum assembly 316 is fixedly mounted on the middle part of the surface of the transmission rod 317, the front end of the transmission rod 317 passes through the through hole and is connected to the tension sensor 311, the rear end of the transmission rod 317 is splined to the output end of the first servo motor 314, the surface of the first servo motor 314 is fixedly mounted on the back side of the baffle 315, and the front side of the baffle 315 is movably connected to the rear end of the drum assembly 316, the lower side of the front side of the baffle 315 is connected to the extended end of the first electric telescopic rod 313, and the base end of the first electric telescopic rod 313 is fixedly mounted on the rear end of the mounting connection block 312.

[0044] In this embodiment, the slide rail mechanism 2 includes a third electric telescopic rod 21, a fixing plate 22, a pulley 23 and a connecting component 24, both ends of the connecting component 24 are connected to the bottom ends of the two groups of third electric telescopic rods 21, the surfaces of the two groups of third electric telescopic rods 21 are connected to the inner wall of the pulley 23, and the top ends of the two groups of third electric telescopic rods 21 are connected to the bottom surface of the fixing plate 22.

[0045] In this embodiment, the connecting component 24 includes a connecting frame 241, a wire groove 242 and a controller 243. The wire groove 242 is opened on both sides of the upper surface of the connecting frame 241. The controller 243 is fixedly installed inside the connecting frame 241. The inside of the controller 243 is linearly connected to the two sets of third electric telescopic rods 21 through a power cord, and the power cord is adapted to the wire groove 242.

[0046] In this embodiment, the top ends of the two sets of third electric telescopic rods 21 are respectively connected to the fabric winding assembly 31 and the fabric stretching assembly 32, and the fabric winding assembly 31 and the fabric stretching assembly 32 are on the same horizontal line.

[0047] Specifically, through the pulley 23 installed on the surface of the first electric telescopic rod 313 and the slide rail groove 104 starting from the top surface of the disc 101, the cloth winding assembly 31 and the cloth stretching assembly 32 can be driven to adjust at different angles on the cloth positioning disc 1, and then the controller 243 set inside the connecting frame 241 is used to adjust the height of the two groups of third electric telescopic rods 21, so as to achieve the effect of controlling the distance between the cloth and the disc 101 and the thread guide plate, further facilitating the operator to sew.

[0048] Working principle:

[0049] Step 1: When in use, the cloth positioning plate 1 can be connected to the thread guide plate below the sewing machine through the horizontal groove on the top surface, and then the two sides of the thread guide plate are squeezed and fixed by the abutment plates 103 on both sides of the inner wall of the horizontal groove, and then the level detector 102 installed at the bottom end of the inner wall of the horizontal groove is started to detect the level between the plate body 101 and the thread guide plate, so that the two are adjusted to the same horizontal plane;

[0050] Step 2: Then install the pulley 23 and the two sets of third electric telescopic rods 21 in the slide rail groove 104 opened on the top surface of the cloth positioning disk 1, and connect the bottom ends of the two sets of third electric telescopic rods 21 to the two ends of the connecting frame 241, so that the two sets of third electric telescopic rods 21 can rotate in opposite directions in the slide rail groove 104, and then adjust the height of the two sets of third electric telescopic rods 21 through the controller 243 and the wire groove 242 provided inside the connecting frame 241, so that the height of the two sets of third electric telescopic rods 21 can be adapted according to the height of the disk body 101 and the wire guide plate, so as to better perform sewing;

[0051] Step 3: The staff then installs the fabric winding assembly 31 and the fabric stretching assembly 32 above the two sets of third electric telescopic rods 21, respectively, and then starts the first electric telescopic rod 313 to pull the cylinder 3161 out of the through hole opened at the top of the installation connection block 312, and then winds the fabric between the squeezing plate 3164 and the arc plate 3162, and drives the squeezing plate 3164 to squeeze and fix the fabric through the spring 3163, and then starts the first servo motor 314 to wind the fabric. When the fabric is completely wound on the cylinder 3161, the operator can pull out one end of the fabric, put it into the gap between the drum 324 and the squeezing block 325, and extend it to the outside;

[0052] Step 4: Start the second electric telescopic rod 326 to drive the squeezing block 325 to move downward and squeeze the cloth to a certain extent. The pressure detector arranged above the second electric telescopic rod 326 detects the pressure of squeezing the cloth, so that the operator can adjust the second electric telescopic rod 326 according to the required tension, and then start the second servo motor 322 to drive the rolling to rotate, thereby stretching the cloth;

[0053] Step 5: After the cloth is installed on the cloth winding assembly 31 and the cloth stretching assembly 32, the operator observes the cloth tension in real time by observing the tension sensor 311, and adjusts and controls the first servo motor 314 and the second servo motor 322 to achieve control of the cloth tension.

[0054] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0056] It should be noted that the device structure and the drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above invention, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field.

[0057] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0058] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A sewing cloth tension control device based on a sewing machine, comprising a cloth positioning plate (1) for the sewing machine, characterized in that: A slide rail mechanism (2) is arranged inside the fabric positioning disk (1); a tension control mechanism (3) is arranged at the top of the slide rail mechanism (2); the tension control mechanism (3) comprises a fabric winding assembly (31) and a fabric stretching assembly (32); the fabric winding assembly (31) is located on a side opposite to the fabric stretching assembly (32); the fabric winding assembly (31) comprises a tension sensor (311), a mounting connection block (312), a first electric telescopic rod (313), a first servo motor (314), a baffle (315), a rotating drum assembly (316), and a transmission rod (317); a front end of the transmission rod (317) is provided inside the mounting connection block (312). The inner wall of the rotating drum assembly (316) is fixedly mounted on the middle part of the surface of the transmission rod (317); the front end of the transmission rod (317) passes through the through hole and is connected to the tension sensor (311); the rear end of the transmission rod (317) is spline-connected to the output end of the first servo motor (314); the surface of the first servo motor (314) is fixedly mounted on the back side of the baffle (315); the front side of the baffle (315) is movably connected to the rear end of the rotating drum assembly (316); the lower side of the front side of the baffle (315) is connected to the extended end of the first electric telescopic rod (313); and the base end of the first electric telescopic rod (313) is fixedly mounted on the rear end of the mounting connection block (312); The rotating drum assembly (316) comprises a cylinder (3161), an arc-shaped plate (3162), a spring (3163) and an extrusion plate (3164); the lower surface of the cylinder (3161) is connected to the arc-shaped plate (3162); both sides of the top surface of the arc-shaped plate (3162) are connected to the bottom surface of the spring (3163); the top surfaces of the two springs (3163) are connected to both sides of the top of the extrusion plate (3164); and both sides of the bottom end of the extrusion plate (3164) are movably connected to the bottom of the arc-shaped plate (3162) via a movable column; The slide rail mechanism (2) comprises a third electric telescopic rod (21), a fixing plate (22), a pulley (23) and a connecting assembly (24); both ends of the connecting assembly (24) are connected to the bottom ends of two groups of third electric telescopic rods (21); the surfaces of the two groups of third electric telescopic rods (21) are connected to the inner wall of the pulley (23); and the top ends of the two groups of third electric telescopic rods (21) are connected to the bottom surface of the fixing plate (22); The fabric positioning disk (1) comprises a disk body (101), a level detector (102), a stop plate (103) and a slide rail groove (104); a top surface of the disk body (101) is provided with a transverse groove and an arc groove respectively; the level detector (102) is fixedly mounted on the bottom end of the inner wall of the transverse groove; both sides of the inner wall of the transverse groove are connected to the bottom surface of the stop plate (103); A slide rail adapted to the pulley (23) is provided inside the arc-shaped groove, and an area opposite to the abutment plate (103) is clamped and fixed to the bottom of the sewing machine.

2. The sewing cloth tension control device based on a sewing machine according to claim 1, characterized in that: The cloth stretching assembly (32) comprises a limit frame (321), a second servo motor (322), a driving rod (323), a roller (324), an extrusion block (325), a second electric telescopic rod (326) and a pressure sensor (327). Through holes adapted to the driving rod (323) are provided below both sides of the inner wall of the limit frame (321). The inner wall of the roller (324) is fixedly mounted on the middle part of the surface of the driving rod (323). The front end of the driving rod (323) penetrates through the inner wall of the roller (324). The through hole is spline-connected to the output end of the second servo motor (322); the surface of the second servo motor (322) is fixedly mounted on one side of the outer surface of the limit frame (321); the extrusion block (325) is arranged above the roller (324); the top surface of the extrusion block (325) is connected to the extended end of the second electric telescopic rod (326); the base end of the second electric telescopic rod (326) passes through the top end of the limit frame (321) and is connected to the bottom end of the pressure sensor (327).

3. The sewing cloth tension control device based on a sewing machine according to claim 1, characterized in that: The connection assembly (24) comprises a connection frame (241), a wire groove (242) and a controller (243); the wire groove (242) is provided on both sides of the upper surface of the connection frame (241); the controller (243) is fixedly mounted inside the connection frame (241); the inside of the controller (243) is linearly connected to the two sets of third electric telescopic rods (21) via a power line, and the power line is adapted to the wire groove (242).

4. The sewing cloth tension control device based on a sewing machine according to claim 3, characterized in that: The top ends of the two sets of third electric telescopic rods (21) are respectively connected to the fabric winding assembly (31) and the fabric stretching assembly (32), and the fabric winding assembly (31) and the fabric stretching assembly (32) are on the same horizontal line.

5. A method for controlling the tension of sewing fabric based on a sewing machine according to a device for controlling the tension of sewing fabric based on a sewing machine according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: When in use, the fabric positioning plate can be connected to the thread guide plate below the sewing machine through the horizontal groove on the top surface, and then the two sides of the thread guide plate can be squeezed and fixed by the abutment plates on both sides of the inner wall of the horizontal groove, and then the level detector installed at the bottom end of the inner wall of the horizontal groove is started to detect the level between the plate body and the thread guide plate, so that the two are adjusted to the same horizontal plane; Step 2: Then install the pulley and the two sets of third electric telescopic rods in the slide rail grooves opened on the top surface of the fabric positioning disk, and connect the bottom ends of the two sets of third electric telescopic rods to the two ends of the connecting frame, so that the two sets of third electric telescopic rods can rotate in opposite directions in the slide rail grooves, and then adjust the heights of the two sets of third electric telescopic rods through the controller and wire grooves provided inside the connecting frame, so that the heights of the two sets of third electric telescopic rods can be adapted according to the heights of the disk body and the wire guide plate, so as to better perform sewing; Step 3: Then the staff installs the fabric winding assembly and the fabric stretching assembly above the two sets of third electric telescopic rods respectively, and then starts the first electric telescopic rod to pull the cylinder out of the through hole opened at the top of the installation connection block, and then winds the fabric between the extrusion plate and the arc plate, and drives the extrusion plate to extrude and fix the fabric through the spring, and then starts the first servo motor to wind the fabric. When the fabric is completely wound on the cylinder, the operator can pull out one end of the fabric, put it into the gap between the drum and the extrusion block, and extend it to the outside; Step 4: Start the second electric telescopic rod to drive the squeezing block to move downward and squeeze the cloth to a certain extent. The pressure detector arranged above the second electric telescopic rod detects the pressure of squeezing the cloth, so that the operator can adjust the second electric telescopic rod according to the required tension, and then start the second servo motor to drive the rolling to rotate, thereby stretching the cloth; Step 5: After the fabric is installed on the fabric winding assembly and the fabric stretching assembly, the operator observes the fabric tension in real time by observing the tension sensor, and adjusts and controls the first servo motor and the second servo motor to achieve control of the fabric tension.

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