Pressing device and automatic round collar machine

Abstract

The present invention relates to a pressing device and an automatic round collar machine. The pressing device comprises a support frame, a deflection correction drive device, deflection correction teeth, a pressing structure, and a support frame; the deflection correction drive device and the pressing structure are both arranged on the support frame; the deflection correction drive device can drive the deflection correction teeth to move along an elliptical trajectory; the pressing structure comprises a pressing block with a hollow structure, the deflection correction teeth extend into the hollow pressing block, and the bottom wall of the pressing block is provided with a through hole corresponding to the deflection correction teeth. When the deflection correction teeth move along the elliptical trajectory, the minimum spacing between the side surface of the deflection correction teeth and the side wall corresponding to the through hole is 0.8mm to 1.3mm; by extending the deflection correction teeth into the pressing block and providing a through hole in the pressing block, the deflection correction teeth can correct the deflection of the fabric through the through hole. Therefore, after the deflection correction teeth are separated from the fabric, the fabric will not return to the offset position under the action of its own elasticity.

Description

Technical Field

[0001] The present invention relates to the technical field related to sewing machines, in particular to a material pressing device and an automatic round neck sewing machine in the process of sewing round necks of T-shirts. Background Art

[0002] Currently, the sewing process for T-shirts in the sewing industry is still mainly manual, and the industry has done little research on automated sewing. The most advanced sewing equipment is semi-automatic sewing, which requires manual support to align the threaded collar with the body fabric during the sewing process, which requires high operational requirements for employees and low sewing efficiency.

[0003] The prior art has a structure for correcting the deviation of the sewing material by means of a correction wheel, but the setting position of the correction wheel is usually difficult to be close to the sewing position of the teeth and the presser foot, that is, the distance between the setting position and the actual sewing position is relatively far. Therefore, after the correction wheel completes the correction of the fabric and disengages, there is a problem that the fabric returns to the offset position. Summary of the Invention

[0004] Based on this, it is necessary to provide a pressing device and an automatic round collar machine that can prevent the fabric from returning to the offset position after correction, in order to address the problem that the setting position of the correction wheel in the existing technology is far away from the sewing position, resulting in the fabric returning to the offset position after correction.

[0005] The present invention first provides a pressing device, including a correction drive device, correction teeth, a pressing structure and a support frame; the correction drive device and the pressing structure are both arranged on the support frame; the correction drive device can drive the correction teeth to move along an elliptical trajectory; the pressing structure includes a pressing block with a hollow structure, the correction teeth extend into the hollow pressing block, and the bottom wall of the pressing block is provided with a through hole corresponding to the correction teeth. When the correction teeth move in the elliptical trajectory, the minimum distance between the side surface of the correction teeth and the corresponding side wall of the through hole is 0.8mm~1.3mm.

[0006] The above-mentioned pressing device extends the correcting teeth into the pressing block and opens a through hole in the pressing block so that the correcting teeth can complete the correction of the cloth through the through hole. During the correction process, the pressing blocks around the correcting teeth can always keep pressing the cloth, and the correction position is in close contact with the pressing position. After the correcting teeth are separated from the cloth, since the pressing blocks around the correcting teeth still have a pressing effect on the cloth, the cloth will not return to the offset position under the action of its own elasticity.

[0007] In one embodiment, when the correcting tooth moves along the elliptical trajectory, the minimum distance between the side surface thereof and the corresponding side wall of the through hole is 1 mm.

[0008] In one embodiment, the pressing structure includes an elastic member, a pressing drive assembly and a pressing block assembly; the pressing drive assembly includes a cylinder, a pressing support plate and a linear bearing, the cylinder is fixed to the support frame, the pressing support plate is fixed to the telescopic end of the cylinder, and the linear bearing is fixed to the pressing support plate; the pressing block assembly includes the pressing block and a sliding rod, the sliding rod is fixed to the pressing block, the sliding rod passes through the pressing support plate and is slidably connected to the linear bearing; the elastic member is sleeved on the sliding rod and is located between the pressing block and the pressing support plate.

[0009] In one embodiment, the bottom wall of the pressing block has a pressing surface, and the pressing surface is arc-shaped.

[0010] In one embodiment, the correction drive device includes a tooth rack, a positioning column, a first slider, a driving structure, and a transmission structure; the positioning column is fixed to the support frame in a direction perpendicular to the plane where the tooth rack is located, the first slider is rotatably connected to the positioning column, the tooth rack is provided with a first sliding groove along its own length direction, and the first slider is slidably connected to the inner wall of the first sliding groove; the driving structure is fixed to the support frame and can drive the tooth rack to reciprocate with the positioning column as the center; one end of the transmission structure is connected to the output shaft of the driving structure, and the other end is connected to the tooth rack, and can drive the tooth rack to reciprocate along its own length direction; the correction teeth are fixed to the tooth rack along the length direction of the tooth rack.

[0011] It can be understood that the transmission structure and the driving structure respectively drive the tooth frame to swing back and forth with the positioning column as the center, and always move back and forth along its own length direction during the swinging process, so that the correction teeth can be driven to move through the composite movement of the tooth frame, so as to drive the fabric to move together to complete the adjustment of the opposite edge of the fabric, and when the correction teeth are reset, they will be separated from the fabric to avoid interference with the position of the fabric after the adjustment is completed.

[0012] In one embodiment, the tooth rack is further provided with a second slide groove along its own length direction; the driving structure includes a motor, an eccentric wheel and a second slider, the motor is fixed to the support frame and its output shaft is perpendicular to the plane where the tooth rack is located, the eccentric wheel is fixed to the output shaft of the motor and is rotatably connected to the second slider, and the second slider is slidably connected to the inner wall of the second slide groove.

[0013] In one embodiment, the output shaft of the driving structure is arranged perpendicular to the direction of the plane where the tooth rack is located; the transmission structure includes a swinging transmission assembly, a support shaft and a moving transmission assembly, and the support shaft is rotatably connected to the support rack and is parallel to the output shaft of the driving structure; one end of the swinging transmission assembly is connected to the output shaft of the driving structure, and the other end is connected to the support shaft, and can convert the unidirectional rotation of the output shaft of the driving structure into the reciprocating rotation of the support shaft; one end of the moving transmission assembly is connected to the support shaft, and the other end is connected to the tooth rack, and can convert the reciprocating rotation of the support shaft into the reciprocating movement of the tooth rack.

[0014] In one embodiment, the swing transmission assembly includes a crank, a first connecting column, a first connecting rod, a second connecting column and a second connecting rod, the crank is fixed to the output shaft of the drive structure, the first connecting column is fixed to the crank and is parallel to the output shaft of the drive structure, one end of the first connecting rod is rotatably connected to the first connecting column, and the other end is rotatably connected to the second connecting column, the second connecting rod is fixed to the support shaft and is provided with a third slide groove, the third slide groove can be perpendicular to the first connecting rod, and the second connecting column is slidably connected to the inner wall of the third slide groove.

[0015] In one embodiment, the mobile transmission assembly includes a third connecting rod and a third connecting column. The third connecting rod is fixed to the support shaft and is provided with a fourth sliding groove. The fourth sliding groove can be perpendicular to the length direction of the tooth rack. The third connecting column is fixedly connected to the tooth rack and is slidably connected to the inner wall of the fourth sliding groove.

[0016] In one embodiment, the first slider has limiting protrusions at both ends along the length direction of the positioning column that are engaged with the tooth rack to limit the movement of the tooth rack relative to the first slider along the length direction of the positioning column; the positioning column has a limiting portion at one end away from its fixed position that is engaged with the first slider, and the correction drive device also includes a limiting block arranged on the positioning column, and the two ends of the limiting block are respectively engaged with the support frame and the first slider to limit the movement of the first slider and the tooth rack along the length direction of the positioning column.

[0017] In one embodiment, the pressing device further includes a sliding structure arranged along the length direction of the tooth frame, and the support frame is slidably disposed on the sliding structure.

[0018] The second aspect of the present invention provides an automatic round collar machine, comprising a material pressing device as described in any one of claims 1 to 3. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the material pressing device of the present invention;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the material pressing structure of the material pressing device of the present invention after being cut apart along the front view direction;

[0022] Figure 3 Schematic diagram of the three-dimensional structure of the pressing block assembly of the pressing device of the present invention;

[0023] Figure 4 Schematic diagram of the three-dimensional structure of the material pressing drive assembly of the material pressing device of the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the material pressing device of the present invention after the side plate of one side of the support frame and the pressing block are hidden;

[0025] Figure 6 for Figure 5 An enlarged schematic diagram of the internal structure of the middle support frame;

[0026] Figure 7 This is a schematic diagram of the three-dimensional structure of the material pressing device of the present invention after hiding the side plate on the other side of the support frame;

[0027] Figure 8 for Figure 7 An enlarged schematic diagram of the internal structure of the middle support frame;

[0028] Figure 9 It is a schematic diagram of the three-dimensional structure of the sliding structure of the pressing device of the present invention;

[0029] Figure numerals: 1, support frame; 100, deviation correction drive device; 20, tooth frame; 21, first slide; 22, second slide; 30, positioning column; 31, limit portion; 40, first slider; 41, limit protrusion; 50, drive structure; 51, motor; 52, eccentric wheel; 53, second slider; 60, transmission structure; 61, swing transmission assembly; 611, crank; 612, first connecting column; 613, first connecting rod; 614, second connecting column; 615, second connecting rod; 616, third slide; 6 2. Support shaft; 63. Mobile transmission assembly; 631. Third connecting rod; 632. Third connecting column; 633. Fourth slide groove; 70. Limit block; 200. Pressing structure; 210. Elastic member; 220. Pressing drive assembly; 221. Cylinder; 222. Pressing support plate; 223. Linear bearing; 230. Pressing block assembly; 231. Pressing block; 232. Slide rod; 233. Through hole; 234. Stop block; 300. Correcting tooth; 310. Connecting rod; 320. Grabbing tooth; 400. Sliding structure. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] It should be noted that when a structure is referred to as being "fixed to" or "disposed on" another structure, it may be directly on the other structure or there may be a central structure. When a structure is considered to be "connected to" another structure, it may be directly connected to the other structure or there may be a central structure at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0035] Please combine Figure 1 and Figure 2 As shown, the present invention first provides a pressing device, including a correction drive device 100, a correction tooth 300, a pressing structure 200 and a support frame 1; the correction drive device 100 and the pressing structure 200 are both arranged on the support frame 1; the correction drive device 100 can drive the correction tooth 300 to move along an elliptical trajectory; the pressing structure 200 includes a pressing block 231 with a hollow structure, and the correction tooth 300 extends into the hollow pressing block 231. The bottom wall of the pressing block 231 is provided with a through hole 233 corresponding to the correction tooth 300. When the correction tooth 300 moves in the elliptical trajectory, the minimum distance between its side and the corresponding side wall of the through hole 233 is 0.8mm~1.3mm.

[0036] By extending the correcting teeth 300 into the pressing block 231 and providing a through hole 233 in the pressing block 231, the correcting teeth 300 can correct the fabric through the through hole 233. During the correcting process, the pressing block 231 around the correcting teeth 300 can always keep the fabric pressed, and the correcting position is closely attached to the pressing position.

[0037] After the correcting teeth 300 are separated from the fabric, the pressing blocks 231 around the correcting teeth 300 still have a pressing effect on the fabric, so the fabric will not return to the offset position under its own elasticity.

[0038] During the pressing process, if the distance between the side of the correcting tooth 300 and the corresponding side wall of the through hole 233 is too large, that is, the area of ​​the through hole 233 is relatively large, then the pressing area of ​​the pressing block 231 is correspondingly small, which may affect the pressing effect of the pressing block 231;

[0039] In addition, a spacing that is too large may cause fabric with a certain degree of elasticity to be stuck in the through hole 233 from the gap between the two, thereby causing feeding jams; at the same time, the fabric stuck in the through hole 233 may also cause the fabric to retract to the position before correction after the correction teeth 300 are disengaged, that is, the correction effect cannot be maintained, thereby affecting the automatic correction operation of the fabric.

[0040] If the distance between the side surface of the correcting tooth 300 and the corresponding side wall of the through hole 233 is too small, the correcting tooth 300 may easily collide with the side wall of the through hole 233 during its movement along the elliptical trajectory, thereby affecting the automatic correcting operation.

[0041] In this application, the minimum distance between the side of the correcting tooth 300 and the corresponding side wall of the through hole 233 is limited to 0.8mm~1.3mm. This can take into account the pressing effect of the pressure block 231 and prevent the fabric from getting stuck in the through hole 233, while meeting the avoidance requirements of the correcting tooth 300 and effectively avoiding the possibility of the correcting tooth 300 interfering with the side wall of the through hole 233.

[0042] Preferably, when the correcting tooth 300 moves along the elliptical trajectory, the minimum distance between its side surface and the corresponding side wall of the through hole 233 is 1 mm.

[0043] Please combine Figure 2 、 Figure 3 as well as Figure 4 As shown, in some embodiments, the pressing structure 200 includes an elastic member 210, a pressing drive assembly 220 and a pressing block assembly 230; the pressing drive assembly 220 includes a cylinder 221, a pressing support plate 222 and a linear bearing 223, the cylinder 221 is fixed to the support frame 1, the pressing support plate 222 is fixed to the telescopic end of the cylinder 221, and the linear bearing 223 is fixed to the pressing support plate 222; the pressing block assembly 230 includes a pressing block 231 and a sliding rod 232, the sliding rod 232 is fixed to the pressing block 231, the sliding rod 232 passes through the pressing support plate 222 and is slidably connected to the linear bearing 223; the elastic member 210 is sleeved on the sliding rod 232 and is located between the pressing block 231 and the pressing support plate 222.

[0044] Since the slide bar 232 is slidably connected to the linear bearing 223 and an elastic member 210 is provided between the pressing block 231 and the pressing support plate 222, the pressing block 231 and the pressing support plate 222 are connected in a floating manner.

[0045] When the cylinder 221 is started and applies pressure to the pressing block 231 through the pressing support plate 222 and the elastic member 210, so that the pressing block 231 presses the cloth, at this time, as long as the upward thrust exerted on the pressing block 231 is greater than the elastic force of the elastic member 210, the pressing block 231 can still move upward, so that the pressing block 231 can press the cloth while ensuring that the bone passing process does not hinder the smooth passage of the material.

[0046] In some embodiments, the pressing block assembly 230 further includes a blocking block 234 , which is fixed to one end of the sliding rod 232 close to the cylinder 221 ;

[0047] The blocking block 234 can abut against the top of the press support plate 222, that is, the press block 231 has a lower limit position relative to the press support plate 222. At this position, the blocking block 234 abuts against the top of the press support plate 222 to prevent the press block assembly 230 from detaching from the press drive assembly 220.

[0048] Please refer to Figure 2 As shown, in some embodiments, the bottom wall of the pressing block 231 has a pressing surface, and the pressing surface is arc-shaped.

[0049] The arc-shaped pressing surface can better fit the body fabric of the round neck T-shirt to prevent the fabric from rebounding.

[0050] Please combine Figure 1 、 Figure 5 as well as Figure 6 As shown, in some embodiments, the correction drive device 100 includes a tooth frame 20, a positioning column 30, a first slider 40, a driving structure 50, and a transmission structure 60; the positioning column 30 is fixed to the support frame 1 in a direction perpendicular to the plane where the tooth frame 20 is located, and the first slider 40 is rotatably connected to the positioning column 30. The tooth frame 20 is provided with a first slide groove 21 along its own length direction, and the first slider 40 is slidably connected to the inner wall of the first slide groove 21; the driving structure 50 is fixed to the support frame 1, and can drive the tooth frame 20 to reciprocate with the positioning column 30 as the center; one end of the transmission structure 60 is connected to the output shaft of the driving structure 50, and the other end is connected to the tooth frame 20, and can drive the tooth frame 20 to move back and forth along its own length direction; the correction tooth 300 is fixed to the tooth frame 20 along the length direction of the tooth frame 20.

[0051] Since the first slider 40 is slidably connected to the inner wall of the first slide groove 21, and the first slider 40 is rotatably connected to the positioning post 30, when the driving structure 50 drives the tooth rack 20 to rotate back and forth with the positioning post 30 as the center, it will drive the first slider 40 to rotate back and forth with the positioning post 30 as the center, that is, the first slider 40 and the tooth rack 20 will not rotate relative to each other, thereby ensuring that after the tooth rack 20 rotates, the tooth rack 20 is always slidably connected to the first slider 40 along its own length direction;

[0052] In addition, the output shaft of the drive structure 50 can drive the tooth frame 20 to reciprocate along its own length direction through the transmission structure 60. After the drive structure 50 is started, the tooth frame 20 reciprocates around the positioning column 30 under the drive of the drive structure 50, that is, the length direction of the tooth frame 20 is in a reciprocating swinging state as the tooth frame 20 rotates;

[0053] Therefore, the movement of the tooth frame 20 can be regarded as a combination of two movements: reciprocating swinging centered on the positioning column 30 and reciprocating movement along its own length direction during the swinging process.

[0054] By fixing the correcting teeth 300 to the tooth frame 20, the correcting teeth 300 can be driven by the tooth frame 20 to move the fabric to complete the alignment adjustment, thereby achieving the correcting of the fabric. For example, when the tooth frame 20 swings until the correcting teeth 300 contact the fabric, the tooth frame 20 moves along its own length direction, and the correcting teeth 300 can move the fabric in the contact position together to complete the alignment adjustment. When the fabric moves to the adjusted position, the tooth frame 20 swings until the correcting teeth 300 are separated from the fabric to prevent the correcting teeth 300 from interfering with the fabric when resetting. The tooth frame 20 moves along its own length direction to drive the correcting teeth 300 to move to the reset position.

[0055] It should be noted that by adjusting the driving structure 50 and the transmission structure 60 , the period and amplitude of the movement of the tooth frame 20 in two directions can be adjusted, thereby controlling the movement trajectory of the tooth frame 20 and the correcting tooth 300 .

[0056] Preferably, the movement trajectory of the correcting tooth 300 is elliptical.

[0057] In some embodiments, the correcting tooth 300 includes a connecting rod 310 and a grabbing tooth 320 . The grabbing tooth 320 is in an elongated strip shape along the length of the tooth frame 20 and has a plurality of triangular grabbing teeth on the bottom surface.

[0058] Please combine Figure 1 as well as Figure 6 As shown, in some embodiments, the tooth frame 20 is further provided with a second slide groove 22 along its own length direction; the driving structure 50 includes a motor 51, an eccentric wheel 52 and a second slider 53, the motor 51 is fixed to the support frame 1 and its output shaft is perpendicular to the plane where the tooth frame 20 is located, the eccentric wheel 52 is fixed to the output shaft of the motor 51, and is rotatably connected to the second slider 53, and the second slider 53 is slidably connected to the inner wall of the second slide groove 22.

[0059] After the motor 51 is started, it can drive the eccentric wheel 52 to rotate around the output shaft of the motor 51. Since the eccentric wheel 52 is rotatably connected to the second slider 53, during the rotation of the eccentric wheel 52, the eccentric wheel 52 always exerts a squeezing force on the second slider 53, so that the second slider 53 has a movement tendency to rotate around the output shaft of the motor 51. The squeezing force can be decomposed into a first component along the length direction of the tooth frame 20 and a second component along the length direction perpendicular to the tooth frame 20.

[0060] Among them, since the second slider 53 is slidably connected to the second slide groove 22, and the second slide groove 22 is opened along the length direction of the tooth frame 20, the second slider 53 will reciprocate along the second slide groove 22 under the action of the first component force, and the first component force will not act on the tooth frame 20;

[0061] The second force component acts on the tooth frame 20 through the second slider 53 , thereby driving the tooth frame 20 and the first slider 40 to reciprocate around the positioning post 30 .

[0062] In some embodiments, the eccentric wheel 52 penetrates the eccentric wheel 52 in a direction parallel to the positioning column 30 .

[0063] In some embodiments, the eccentric wheel 52 is provided with a fixing hole along its radial direction, so that the output shaft of the motor 51 and the eccentric wheel 52 can be fixed by screws passing through the fixing hole;

[0064] Of course, the eccentric wheel 52 and the output shaft of the motor 51 can also be fixed by interference fit, welding or other commonly used fixed connection methods, and this application does not make further limitations here.

[0065] Please combine Figure 6 、 Figure 7 as well as Figure 8 As shown, in some embodiments, the output shaft of the driving structure 50 is set perpendicular to the direction of the plane where the tooth frame 20 is located; the transmission structure 60 includes a swinging transmission component 61, a support shaft 62 and a moving transmission component 63, the support shaft 62 is rotatably connected to the support frame 1 and is parallel to the output shaft of the driving structure 50; one end of the swinging transmission component 61 is connected to the output shaft of the driving structure 50, and the other end is connected to the support shaft 62, which can convert the unidirectional rotation of the output shaft of the driving structure 50 into the reciprocating rotation of the support shaft 62; one end of the moving transmission component 63 is connected to the support shaft 62, and the other end is connected to the tooth frame 20, which can convert the reciprocating rotation of the support shaft 62 into the reciprocating movement of the tooth frame 20.

[0066] In some embodiments, the support shaft 62 is located between the motor 51 and the positioning column 30 , and both ends of the support shaft 62 are rotatably connected to the side walls of the support frame 1 through ball bearings.

[0067] Please refer to Figure 8 As shown, in some embodiments, the swing transmission assembly 61 includes a crank 611, a first connecting column 612, a first connecting rod 613, a second connecting column 614 and a second connecting rod 615. The crank 611 is fixed to the output shaft of the drive structure 50, the first connecting column 612 is fixed to the crank 611 and is parallel to the output shaft of the drive structure 50, one end of the first connecting rod 613 is rotatably connected to the first connecting column 612, and the other end is rotatably connected to the second connecting column 614, the second connecting rod 615 is fixed to the support shaft 62 and is provided with a third slide groove 616, the third slide groove 616 can be perpendicular to the first connecting rod 613, and the second connecting column 614 is slidably connected to the inner wall of the third slide groove 616.

[0068] When the drive structure 50 is started, the output shaft rotates, driving the crank 611 and the first connecting post 612 to rotate about the axis of the output shaft. Furthermore, because the first connecting post 612 is rotatably connected to one end of the first connecting rod 613, the first connecting post 612 can drive the end of the first connecting rod 613 connected to the first connecting post 612 to rotate about the axis of the output shaft.

[0069] During the rotation of the first connecting post 612, a driving force is always exerted on the end of the first connecting rod 613 connected to itself. This driving force is transmitted to the second connecting post 614 through the rigid first connecting rod 613, so that the second connecting post 614 has a tendency to rotate along a circular trajectory. The extrusion force can be decomposed into a third component along the length direction of the second connecting rod 615 and a fourth component along the tangential direction of the second connecting post 614 with the support shaft 62 as the center.

[0070] Since the second connecting post 614 is slidably connected to the third sliding groove 616 and the third sliding groove 616 is provided along the length direction of the second connecting rod 615, the second connecting post 614 will reciprocate along the third sliding groove 616 under the action of the third component force, and the third component force will not act on the second connecting rod 615.

[0071] The fourth force component acts on the second connecting rod 615 through the second connecting column 614 , thereby driving the second connecting rod 615 to reciprocate around the support shaft 62 .

[0072] Please refer to Figure 6 As shown, in some embodiments, the mobile transmission assembly 63 includes a third connecting rod 631 and a third connecting column 632. The third connecting rod 631 is fixed to the support shaft 62 and is provided with a fourth sliding groove 633. The fourth sliding groove 633 can be perpendicular to the length direction of the tooth rack 20. The third connecting column 632 is fixedly connected to the tooth rack 20 and is slidably connected to the inner wall of the fourth sliding groove 633.

[0073] Since the support shaft 62 is fixedly connected to the third connecting rod 631, the reciprocating rotation of the support shaft 62 can drive the third connecting rod 631 to reciprocate together;

[0074] During the rotation of the third connecting rod 631, the third connecting column 632 is subjected to three forces: an extrusion force exerted by the third connecting rod 631 on it in a tangential direction of the position of the third connecting column 632 with the support shaft 62 as the center, a friction force exerted by the inner wall of the fourth sliding groove 633 on it in the length direction of the third connecting rod 631, and a reaction force exerted by the first slider 40 and the second slider 53 on the tooth rack 20 in a direction perpendicular to the length direction of the tooth rack 20;

[0075] The three forces can be decomposed into a component force along the length direction of the tooth frame 20 and a component force along the length direction perpendicular to the tooth frame 20. Among them, the component forces perpendicular to the direction of the tooth frame 20 cancel each other out. Therefore, the third connecting column 632 and the tooth frame 20 will move back and forth along the length direction of the tooth frame 20 under the action of the component forces along the length direction of the tooth frame 20.

[0076] Please combine Figure 6 and Figure 8 As shown, in some embodiments, the first slider 40 has limiting protrusions 41 at both ends along the length direction of the positioning column 30 that are engaged with the tooth frame 20 to limit the movement of the tooth frame 20 relative to the first slider 40 along the length direction of the positioning column 30; the positioning column 30 has a limiting portion 31 at one end away from its fixed position that is engaged with the first slider 40, and the correction drive device 100 also includes a limiting block 70 arranged on the positioning column 30, and the two ends of the limiting block 70 are respectively engaged with the support frame 1 and the first slider 40 to limit the movement of the first slider 40 and the tooth frame 20 along the length direction of the positioning column 30.

[0077] By limiting the first slider 40 by the positioning column 30 and the limiting block 70, and limiting the tooth rack 20 by the limiting protrusion 41, the tooth rack 20 can be prevented from deviating along the length direction of the positioning column 30 during movement, thereby ensuring the movement stability of the tooth rack 20.

[0078] In some embodiments, both ends of the second slider 53 along the length of the positioning column 30 also have protrusions that can engage with the tooth frame 20 to limit the movement of the tooth frame 20 relative to the second slider 53 along the length of the positioning column 30.

[0079] Please refer to Figure 9 As shown, in some embodiments, the pressing device further includes a sliding structure 400 arranged along the length direction of the tooth frame 20, and the support frame 1 is slidably disposed on the sliding structure 400.

[0080] When the pressing device is in the waiting state, the pressing structure 200 is not opposite to the working position, so that the operator can place the cloth. When the cloth is placed, the sliding structure 400 can drive the support frame 1 to move along the length direction of the tooth frame 20 until the pressing structure 200 is opposite to the working position. At this time, the fabric edge sensor of the automatic round collar machine will identify whether the fabric edge is in the predetermined position and determine whether subsequent correction work is required.

[0081] In some embodiments, the sliding structure 400 includes a slide rail arranged along the length direction of the tooth frame 20 and a slider sliding along the slide rail, and the support frame 1 is fixed to the slider.

[0082] The present invention also provides an automatic round collar machine, comprising the above-mentioned material pressing device.

[0083] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A pressing device, characterized in that: It comprises a deviation-correcting driving device (100), deviation-correcting teeth (300), a material pressing structure (200) and a support frame (1); The deviation-correcting drive device (100) and the material pressing structure (200) are both arranged on the support frame (1); The deviation-correcting driving device (100) is capable of driving the deviation-correcting tooth (300) to move along an elliptical trajectory; The pressing structure (200) includes a pressing block (231) with a hollow structure, the correcting tooth (300) extends into the hollow pressing block (231), and the bottom wall of the pressing block (231) is provided with a through hole (233) corresponding to the correcting tooth (300). When the correcting tooth (300) moves in an elliptical trajectory, the minimum distance between its side surface and the corresponding side wall of the through hole (233) is 0.8 mm to 1.3 mm.

2. The pressing device according to claim 1, characterized in that: When the correcting tooth (300) moves along the elliptical trajectory, the minimum distance between its side surface and the corresponding side wall of the through hole (233) is 1 mm.

3. The pressing device according to claim 1, characterized in that: The material pressing structure (200) comprises an elastic member (210), a material pressing drive assembly (220) and a pressing block assembly (230); The pressing drive assembly (220) comprises a cylinder (221), a pressing support plate (222) and a linear bearing (223); the cylinder (221) is fixed to the support frame (1); the pressing support plate (222) is fixed to the telescopic end of the cylinder (221); and the linear bearing (223) is fixed to the pressing support plate (222); The pressing block assembly (230) includes the pressing block (231) and a sliding rod (232), wherein the sliding rod (232) is fixed to the pressing block (231), and the sliding rod (232) passes through the pressing support plate (222) and is slidably connected to the linear bearing (223); The elastic member (210) is sleeved on the sliding rod (232) and is located between the pressing block (231) and the pressing support plate (222).

4. The pressing device according to claim 1, characterized in that: The bottom wall of the pressing block (231) has a pressing surface, and the pressing surface is in an arc shape.

5. The pressing device according to claim 1, characterized in that: The deviation-correcting driving device (100) comprises a tooth frame (20), a positioning column (30), a first sliding block (40), a driving structure (50), and a transmission structure (60); The positioning column (30) is fixed to the support frame (1) in a direction perpendicular to the plane where the tooth frame (20) is located, the first slider (40) is rotatably connected to the positioning column (30), the tooth frame (20) is provided with a first sliding groove (21) along its own length direction, and the first slider (40) is slidably connected to the inner wall of the first sliding groove (21); The driving structure (50) is fixed to the support frame (1) and is capable of driving the tooth frame (20) to reciprocate around the positioning column (30); One end of the transmission structure (60) is connected to the output shaft of the driving structure (50), and the other end is connected to the tooth frame (20), and can drive the tooth frame (20) to move back and forth along its own length direction; The deviation-correcting teeth (300) are fixed to the tooth frame (20) along the length direction of the tooth frame (20).

6. The pressing device according to claim 5, characterized in that: The tooth frame (20) is further provided with a second sliding groove (22) along its length direction; The driving structure (50) includes a motor (51), an eccentric wheel (52) and a second slider (53), wherein the motor (51) is fixed to the support frame (1) and its output shaft is perpendicular to the plane where the tooth frame (20) is located, the eccentric wheel (52) is fixed to the output shaft of the motor (51) and is rotationally connected to the second slider (53), and the second slider (53) is slidingly connected to the inner wall of the second slide groove (22).

7. The pressing device according to claim 5, characterized in that: The output shaft of the driving structure (50) is arranged perpendicular to the direction of the plane where the tooth frame (20) is located; The transmission structure (60) comprises a swing transmission assembly (61), a support shaft (62) and a moving transmission assembly (63), wherein the support shaft (62) is rotationally connected to the support frame (1) and is parallel to the output shaft of the driving structure (50); One end of the swing transmission assembly (61) is connected to the output shaft of the drive structure (50), and the other end is connected to the support shaft (62), and can convert the unidirectional rotation of the output shaft of the drive structure (50) into the reciprocating rotation of the support shaft (62); One end of the mobile transmission component (63) is connected to the support shaft (62), and the other end is connected to the tooth frame (20), and can convert the reciprocating rotation of the support shaft (62) into the reciprocating movement of the tooth frame (20).

8. The pressing device according to claim 7, characterized in that: The swing transmission assembly (61) includes a crank (611), a first connecting column (612), a first connecting rod (613), a second connecting column (614) and a second connecting rod (615), wherein the crank (611) is fixed to the output shaft of the driving structure (50), the first connecting column (612) is fixed to the crank (611) and is parallel to the output shaft of the driving structure (50), one end of the first connecting rod (613) is rotatably connected to the first connecting column (612), and the other end is rotatably connected to the second connecting column (614), the second connecting rod (615) is fixed to the support shaft (62) and is provided with a third sliding groove (616), the third sliding groove (616) can be perpendicular to the first connecting rod (613), and the second connecting column (614) is slidably connected to the inner wall of the third sliding groove (616).

9. The pressing device according to claim 7, characterized in that: The mobile transmission assembly (63) includes a third connecting rod (631) and a third connecting column (632), the third connecting rod (631) is fixed to the support shaft (62), and is provided with a fourth sliding groove (633), the fourth sliding groove (633) can be perpendicular to the length direction of the tooth rack (20), the third connecting column (632) is fixedly connected to the tooth rack (20) and is slidably connected to the inner wall of the fourth sliding groove (633).

10. The pressing device according to claim 5, characterized in that: The first slider (40) has limiting protrusions (41) at both ends along the length direction of the positioning column (30) that are engaged with the tooth frame (20) to limit the movement of the tooth frame (20) relative to the first slider (40) along the length direction of the positioning column (30); The end of the positioning column (30) away from its own fixed position has a limiting portion (31) that is locked with the first slider (40), and the correction drive device also includes a limiting block (70) arranged on the positioning column (30), and the two ends of the limiting block (70) are respectively locked with the support frame (1) and the first slider (40) to limit the movement of the first slider (40) and the tooth frame (20) along the length direction of the positioning column (30).

11. The pressing device according to claim 5, characterized in that: The pressing device further comprises a sliding structure (400) arranged along the length direction of the tooth frame (20), and the support frame (1) is slidably arranged on the sliding structure (400).

12. An automatic round collar machine, characterized in that: The device comprises a material pressing device as described in any one of claims 1 to 11.

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