Cloth pressing mechanism for industrial sewing machine

Abstract

The invention discloses a cloth pressing mechanism for an industrial sewing machine, and relates to the field of sewing machines, the cloth pressing mechanism comprises a fixing plate mounted on a rack of the industrial sewing machine, and further comprises two clamping mechanisms used for pressing cloth, the two clamping mechanisms are both mounted on the fixing plate, and each clamping mechanism comprises an upper pressing roller, a lower pressing roller and a driving mechanism A; rotating shafts at the two ends of the lower pressing roller are rotationally connected with the fixing plate, and the two ends of the upper pressing roller and the lower pressing roller are connected with a driving mechanism A; according to the cloth pressing mechanism for the industrial sewing machine, the two clamping mechanisms are symmetrically arranged on the fixing plate, each clamping mechanism comprises an upper pressing roller and a lower pressing roller, gear transmission in the A driving mechanism and linkage of a connecting rod assembly are achieved, it is guaranteed that the upper pressing rollers and the lower pressing rollers rotate synchronously and reversely, and the rotating speed is consistent; power is transmitted to the upper pressing roller through gear meshing, relative sliding of multiple layers of cloth caused by friction force difference is avoided, and wrinkles are effectively eliminated.

Description

Technical Field

[0001] The invention relates to sewing machine technology, in particular to a cloth pressing mechanism for an industrial sewing machine. Background Art

[0002] In the field of industrial sewing machines, the pressing and conveying of fabrics are crucial links in the sewing process. Traditional fabric pressing mechanisms are often simple in structure and single in function, and are difficult to adapt to fabrics of different thicknesses and materials. Especially when sewing multiple layers of fabrics, due to the difference in friction between the layers of fabric, it is easy to cause inconsistent fabric movement and wrinkles, which seriously affects the sewing quality and efficiency. In addition, existing fabric pressing mechanisms often cannot adjust the tension of the fabric according to different fabric properties (such as elasticity, rigidity, etc.), further limiting their scope of application.

[0003] For example, in the Chinese invention patent with the authorization announcement number CN117144577B, a clothing processing positioning clamping device is disclosed. The clothing processing positioning clamping device drives two active rollers on the same side to rotate together through a transmission belt 2, and the two active rollers drive the driven roller and the mobile roller on the same side to rotate through a transmission belt 1, respectively. The stretching handle is pulled backward and rotated, so that the mobile rod 2 rotates through the protruding teeth pulling gear, and the mobile rod 1 is pushed forward. The two mobile rollers on the right side are pulled to the side away from the active roller by the tension, so that the driven roller gradually approaches the active roller, and then the sliding block is clamped in the handle groove, so as to achieve the purpose of rolling and flattening the cloth to be processed, thereby improving the flatness of the cloth during processing and improving the qualified rate of the product; However, in the actual fabric sewing process, usually multiple layers of fabric are sewn together. The device drives the active roller and the driven roller to rotate in the same direction through a transmission belt to clamp and convey the fabric. In the actual processing, it is easy to cause relative movement between the multiple layers of fabric, causing certain wrinkles in the fabric. Moreover, in the sewing process of different fabrics (such as elastic fabrics and non-elastic fabrics), it cannot effectively adjust the tension of the fabric, which easily affects the sewing quality.

[0004] Therefore, it is particularly important to develop a fabric pressing mechanism that can adapt to different fabric characteristics, ensure the consistency of fabric movement, and flexibly adjust the fabric tension. Summary of the invention

[0005] The purpose of the present invention is to provide a cloth pressing mechanism for an industrial sewing machine to solve the problem that the pressing mechanism in the prior art is difficult to ensure the consistency of movement of each layer of cloth when sewing multiple layers of cloth, and the upper and lower layers of cloth are prone to move in opposite directions relative to each other, resulting in cloth wrinkles, and the tension of the cloth cannot be adjusted according to different cloths, affecting the sewing effect and efficiency.

[0006] In order to achieve the above-mentioned object, the present invention provides the following technical solution: a cloth pressing mechanism for an industrial sewing machine, comprising a fixing plate, which is installed on a frame of the industrial sewing machine, and further comprising: Two clamping mechanisms are used to press the fabric. Both clamping mechanisms are installed on the fixed plate. The clamping mechanisms include an upper pressing roller, a lower pressing roller and an A driving mechanism. The rotating shafts at both ends of the lower pressing roller are rotatably connected to the fixed plate. Both ends of the upper pressing roller and the lower pressing roller are respectively connected to the A driving mechanism. The A driving mechanism is used to drive the upper pressing roller and the lower pressing roller to rotate around their respective axes, and the upper pressing roller and the lower pressing roller rotate in opposite directions. The synchronous reverse rotation of the upper pressing roller and the lower pressing roller can avoid the wrinkle problem caused by the relative reverse movement of the upper and lower layers of fabric when conveying multiple layers of fabric, thereby ensuring the flatness of the fabric during the sewing process. A B driving mechanism, one side of which is connected to an upper pressing roller in one of the clamping mechanisms, and the B driving mechanism is used to drive the upper pressing roller connected thereto to move in a direction perpendicular to the upper surface of the fixed plate. By adjusting the B driving mechanism, the spacing between the upper pressing roller and the lower pressing roller can be flexibly adjusted to meet the pressing requirements of fabrics of different thicknesses, thereby ensuring that the fabrics are fully pressed during the sewing process and avoiding damage to the fabrics caused by excessive squeezing; An adjusting roller, which is arranged on the side of another clamping mechanism, and is used to adjust the tension of the cloth; A C driving mechanism, which is installed on the fixed plate, and the C driving mechanism includes a driving component and a limiting component, and the driving component can drive the adjusting roller and the upper pressure roller on one side of the adjusting roller to move in a direction perpendicular to the upper surface of the fixed plate; The upper pressure roller on one side of the adjusting roller can move downward in a direction perpendicular to the upper surface of the fixed plate, and the limit position of its downward movement is position A; The limiting component is used to adjust the height of point A. When the driving component drives the upper pressure roller on one side of the adjusting roller to move downward to point A, the driving component drives the upper pressure roller on the side of the adjusting roller to move downward in a direction perpendicular to the upper surface of the fixed plate to ensure that the upper pressure roller will not move downward excessively during the tensioning process of the fabric, thereby protecting the fabric from damage.

[0007] When the cloth passes through the cloth pressing mechanism of the present invention, the distance between the upper pressing roller and the lower pressing roller is first adjusted by the B driving mechanism to preliminarily press the cloth. Then, the A driving mechanism drives the upper pressing roller and the lower pressing roller to rotate synchronously in opposite directions to smoothly convey the cloth to the sewing area. After the cloth arrives at the sewing area, the driving component of the C driving mechanism drives the adjusting roller and the upper pressing roller on one side of the adjusting roller to move further downward to tighten the cloth. By adjusting the downward movement of the adjusting roller, the tension of the cloth can be accurately controlled to ensure that the cloth maintains the best sewing state during the sewing process.

[0008] Furthermore, the A driving mechanism includes a rotating driving member and two groups of A driving components, the two groups of A driving components are symmetrically arranged on both sides of the upper pressure roller, the A driving component includes an A gear, a B gear, a C gear, a D gear, an A connecting rod, a B connecting rod and a transmission shaft, the A gear is fixedly sleeved on the end of the upper pressure roller, one side of the A gear is meshed with the B gear, the B gear is rotatably installed on the A connecting rod through a rotating shaft, one end of the A connecting rod is rotatably connected to the end of the upper pressure roller, and the other end of the A connecting rod is rotatably connected to one end of the B connecting rod through the transmission shaft. The other end of the B connecting rod is rotatably connected to the end of the lower pressure roller, and the C gear is rotatably sleeved on the outside of the transmission shaft. One side of the C gear is meshed with the B gear, and the other side of the C gear is meshed with the D gear. The D gear is fixedly sleeved on the end of the lower pressure roller, and one end of the lower pressure roller is connected to a rotating drive member for driving the lower pressure roller to rotate around its own axis. The A driving mechanism adopts a unique design of gear transmission and connecting rod assembly linkage to ensure that the upper pressure roller and the lower pressure roller have the same speed when they rotate synchronously in opposite directions, avoiding the problem of cloth wrinkles caused by speed differences.

[0009] Furthermore, the B driving mechanism includes a U-shaped frame and an A telescopic driving member, both ends of the upper pressing roller are respectively rotatably connected to the U-shaped frame, both sides of the U-shaped frame are respectively slidably connected to the fixed plate, the bottom end of the U-shaped frame is fixedly connected to the A telescopic driving member, and the fixed end of the A telescopic driving member is fixedly connected to the fixed plate. Through the adjustment of the B driving mechanism, the spacing between the upper pressing roller and the lower pressing roller can be flexibly adjusted to meet the pressing requirements of fabrics of different thicknesses. In this way, the fabric can be fully pressed during the sewing process while avoiding damage to the fabric caused by excessive squeezing.

[0010] Furthermore, the driving component includes a mobile driving member and two groups of B driving components, the two groups of B driving components are symmetrically arranged at both ends of the adjusting roller, the B driving component includes an A connecting member, a B connecting member, a mobile gear, a support frame, a support seat and two racks, the top end of the A connecting member is connected to the end of the adjusting roller, the bottom end of the A connecting member is connected to one of the racks, the A connecting member, the top end of the B connecting member is rotatably connected to the end of the upper pressure roller on one side, the bottom end of the B connecting member is fixedly connected to the other rack, the sides of the two racks away from each other are both slidably connected to the support frame, the top end of the support frame is fixedly connected to the fixed plate, the mobile gear is arranged between the two racks, and the two sides of the mobile gear are respectively connected to the two racks, the mobile gear is rotatably installed on the support seat, and one side of the support seat is connected to a mobile driving member for driving the support seat to move along the length direction of the rack.

[0011] Furthermore, the A connecting member is provided in an integral shape, the top end of the A connecting member is rotatably connected to the end of the adjusting roller, and the bottom end of the A connecting member is fixedly connected to the rack located at the bottom thereof.

[0012] Furthermore, the A connecting member includes a connecting sleeve and an A screw, the top end of the connecting sleeve is rotatably connected to the end of the adjusting roller, the inner side wall of the connecting sleeve is threadedly connected to the A screw, and the bottom end of the A screw is rotatably connected to the rack located at its bottom.

[0013] Furthermore, the mobile driving member includes a mobile frame and a B telescopic driving member, the upper surface of the mobile frame is fixedly connected to the support seat, the mobile end of the B telescopic driving member is fixedly connected to the mobile frame, and the fixed end of the B telescopic driving member is fixedly connected to the fixed plate.

[0014] Furthermore, the limiting component includes two sets of limiting components, which are respectively installed on two support frames. The limiting components include a B screw and a blocking block. The outer wall of the B screw is threadedly connected to the support frame, the top of the B screw is rotatably connected to the blocking block, and one side of the blocking block is slidably connected to the support frame.

[0015] Furthermore, the outer parts of the upper pressing roller and the lower pressing roller are coated with an anti-skid layer to increase the friction coefficient with the cloth and prevent the cloth from slipping during transportation.

[0016] Furthermore, the outer parts of the upper pressing roller and the lower pressing roller are both provided with a plurality of strip-shaped protrusions to increase the friction coefficient with the cloth and prevent the cloth from slipping during the conveying process.

[0017] Compared with the prior art, the cloth pressing mechanism for an industrial sewing machine provided by the present invention is symmetrically arranged on a fixed plate through two sets of clamping mechanisms, which respectively include an upper pressing roller and a lower pressing roller, and the linkage of the gear transmission and the connecting rod assembly in the A driving mechanism, so as to ensure that the upper pressing roller and the lower pressing roller rotate synchronously in opposite directions and at the same speed, and the rotating driving member drives the lower pressing roller to rotate, and transmits power to the upper pressing roller through gear meshing, so as to avoid relative sliding of multiple layers of cloth caused by friction difference, and effectively eliminate wrinkles; The meshing transmission of the moving gear and the rack in the driving component realizes the linkage downward pressing of the adjusting roller and the upper pressing roller. When the upper pressing roller reaches position A, the moving gear continues to move downward under the drive of the support seat, driving the adjusting roller to press down the fabric alone to form tension. The setting of the A connecting piece supports the fine adjustment of the initial height of the adjusting roller. Combined with the precise stroke control of the B telescopic driving piece, the tension can be dynamically adjusted for elastic or rigid fabrics. The B drive mechanism can drive the upper pressing roller to move vertically through the U-shaped frame and the A telescopic drive member, adjust the distance between the upper pressing roller and the lower pressing roller, and adapt to the pressing requirements of fabrics of different thicknesses. The B screw and the blocking block in the limiting component can dynamically adjust the upper pressing roller's downward limit position, accurately control the pressing force, and avoid excessive squeezing and damage to the fabric. Through the coordination of the B drive mechanism, the limiter and the C drive mechanism, the "one-click" adjustment of the clamping force and tension can be achieved to adapt to various sewing scenarios, and it can be compatible with fabrics of different thicknesses and materials to meet the complex sewing needs in the fields of clothing, home textiles, etc. By coating the surfaces of the upper and lower pressing rollers with an anti-skid layer or providing strip-shaped protrusions, the friction coefficient with the cloth is increased, slipping is prevented during transportation, and the stability of the mechanism is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the installation of a cloth pressing mechanism for an industrial sewing machine provided by an embodiment of the present invention; Figure 2 A schematic diagram of a first external overall structure provided by an embodiment of the present invention; Figure 3 A schematic diagram of a second external overall structure provided by an embodiment of the present invention; Figure 4 A schematic diagram of a front cross-sectional structure provided by an embodiment of the present invention; Figure 5 A schematic diagram of a side cross-sectional structure provided by an embodiment of the present invention; Figure 6 A schematic diagram of a first partial three-dimensional structure provided by an embodiment of the present invention; Figure 7 A schematic diagram of a second partial three-dimensional structure provided by an embodiment of the present invention; Figure 8 A schematic diagram of a third partial three-dimensional structure provided in an embodiment of the present invention.

[0020] Description of reference numerals: 100, fixed plate; 200, clamping mechanism; 210, upper pressure roller; 220, lower pressure roller; 230, A drive mechanism; 231, A gear; 232, B gear; 233, C gear; 234, D gear; 235, A connecting rod; 236, B connecting rod; 237, transmission shaft; 238, rotating drive member; 300, B drive mechanism; 301, U-shaped frame; 302, A telescopic drive member; 400, adjustment Section roller; 500, C driving mechanism; 510, driving component; 511, A connecting piece; 5111, connecting sleeve; 5112, A screw; 512, B connecting piece; 513, moving gear; 514, supporting frame; 515, supporting seat; 516, rack; 517, moving frame; 518, B telescopic driving piece; 520, limiting component; 521, B screw; 522, blocking block; 600, blocking piece. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] See also Figures 1 to 3 , a cloth pressing mechanism for an industrial sewing machine, comprising a fixing plate 100, which is mounted on a frame of the industrial sewing machine, and further comprising: Two clamping mechanisms 200 are used to press the cloth. Both clamping mechanisms 200 are installed on the fixed plate 100. The clamping mechanisms 200 include an upper pressing roller 210, a lower pressing roller 220 and an A driving mechanism 230. The rotating shafts at both ends of the lower pressing roller 220 are rotatably connected to the fixed plate 100. Both ends of the upper pressing roller 210 and the lower pressing roller 220 are respectively connected to the A driving mechanism 230. The A driving mechanism 230 is used to drive the upper pressing roller 210 and the lower pressing roller 220 to rotate around their respective axes, and the upper pressing roller 210 and the lower pressing roller 220 rotate in opposite directions. A B driving mechanism 300, one side of which is connected to an upper pressing roller 210 in one of the clamping mechanisms 200, and the B driving mechanism 300 is used to drive the upper pressing roller 210 connected thereto to move in a direction perpendicular to the upper surface of the fixing plate 100; An adjusting roller 400, which is disposed on the side of another clamping mechanism 200, and the adjusting roller 400 is used to adjust the tension of the cloth; A C driving mechanism 500 is mounted on the fixed plate 100. The C driving mechanism 500 includes a driving component 510 and a limiting component 520. The driving component 510 can drive the adjusting roller 400 and the upper pressing roller 210 on one side of the adjusting roller 400 to move in a direction perpendicular to the upper surface of the fixed plate 100. The upper pressing roller 210 on one side of the adjusting roller 400 can move downward in a direction perpendicular to the upper surface of the fixing plate 100, and the limit position of its downward movement is position A; The limiting component 520 is used to adjust the height at point A. When the driving component 510 drives the upper pressure roller 210 on one side of the adjusting roller 400 to move downward to point A, the driving component 510 drives the adjusting roller 400 to move downward relative to the upper pressure roller 210 on one side of the adjusting roller 400 in a direction perpendicular to the upper surface of the fixed plate 100.

[0023] In the field of industrial sewing machines, the pressing and conveying of fabrics are crucial links in the sewing process. However, traditional fabric pressing mechanisms are often simple in structure and single in function, and it is difficult to effectively handle fabrics of different thicknesses and materials. Especially when sewing multiple layers of fabrics, traditional mechanisms are prone to cause relative movement between fabrics, resulting in wrinkles, which seriously affects sewing quality and efficiency. To this end, the cloth pressing mechanism of the present application passes the cloth between the upper pressing roller 210 and the lower pressing roller 220 located on one side of the adjusting roller 400, passes through the bottom of the adjusting roller 400, passes through the upper surface of the fixed plate 100, and passes through the upper pressing roller 210 and the lower pressing roller 220 in another clamping mechanism 200. During the process of the industrial sewing machine sewing the cloth, the upper pressing roller 210 connected thereto is driven downward by the B driving mechanism 300, and the upper pressing roller 210 cooperates with the lower pressing roller 220 to clamp the cloth, and the upper pressing roller 210 and the lower pressing roller 220 can be driven to rotate synchronously in the opposite direction by the A driving mechanism 230. The upper pressing roller 210 and the lower pressing roller 220 cooperate to convey the cloth, and the conveying speed can be specifically adjusted according to the sewing conveying speed of the industrial sewing machine. Since the upper pressing roller 210 and the lower pressing roller 220 rotate synchronously in the opposite direction, the consistency of cloth movement can also be ensured when sewing two or more pieces of cloth. The height at A is adjusted by the limiting component 520, that is, the height of the limit position when the upper pressing roller 210 on one side of the adjusting roller 400 moves downward is adjusted, so that the shortest distance between the upper pressing roller 210 and the lower pressing roller 220 on one side of the adjusting roller 400 can be effectively adjusted, so that the pressing force on the cloth can be adjusted according to different cloths to be sewn (such as cloths of different thicknesses), and the cloth is more flat under the rolling conveyance of the upper pressing roller 210 and the lower pressing roller 220; After the driving component 510 drives the upper pressing roller 210 on one side of the adjusting roller 400 to move downward to position A, that is, after the upper pressing roller 210 and the lower pressing roller 220 on one side of the adjusting roller 400 cooperate to press the cloth, the driving component 510 drives the adjusting roller 400 to move downward relative to the upper pressing roller 210 on one side of the adjusting roller 400 in a direction perpendicular to the upper surface of the fixed plate 100, and the adjusting roller 400 presses down on the cloth to tighten the cloth, so that the tension of the cloth during sewing can be adjusted according to the downward pressing height of the adjusting roller 400, that is, the tension of the cloth during sewing can be adjusted according to different processing methods for different cloths, so as to avoid wrinkles of the cloth during sewing. This mechanism can be widely used in industrial sewing machines, automatic quilting equipment and multi-layer composite material sewing production lines, and is particularly suitable for high-precision automotive interiors, medical textile products and high-end clothing processing fields, significantly improving product yield and production efficiency.

[0024] See also Figure 2 , Figure 3 , Figure 6 and Figure 7In one embodiment of the present invention, the A drive mechanism 230 includes a rotary drive member 238 and two groups of A drive components, the two groups of A drive components are symmetrically arranged on both sides of the upper pressure roller 210, the A drive component includes an A gear 231, a B gear 232, a C gear 233, a D gear 234, an A connecting rod 235, a B connecting rod 236 and a transmission shaft 237, the A gear 231 is fixedly sleeved on the end of the upper pressure roller 210, one side of the A gear 231 is meshed with the B gear 232, the B gear 232 is rotatably installed on the A connecting rod 235 through a rotating shaft, and one end of the A connecting rod 235 The A connecting rod 235 is rotatably connected to the end of the upper pressure roller 210, the other end of the A connecting rod 235 is rotatably connected to one end of the B connecting rod 236 through the transmission shaft 237, the other end of the B connecting rod 236 is rotatably connected to the end of the lower pressure roller 220, the C gear 233 is rotatably sleeved on the outside of the transmission shaft 237, one side of the C gear 233 is meshed with the B gear 232, and the other side of the C gear 233 is meshed with the D gear 234, the D gear 234 is fixedly sleeved on the end of the lower pressure roller 220, and one end of the lower pressure roller 220 is connected to a rotating driving member 238 for driving the lower pressure roller 220 to rotate around its own axis; Specifically, the lower pressing roller 220 is driven to rotate by the rotating driving member 238, the lower pressing roller 220 drives the D gear 234 to rotate, the D gear 234 drives the C gear 233 to rotate, the C gear 233 drives the A gear 231 to rotate through the B gear 232, the A gear 231 drives the upper pressing roller 210 to rotate, when the upper pressing roller 210 rotates, the A connecting rod 235 rotates around the transmission shaft 237 relative to the B connecting rod 236, the A gear 231 and the B gear 232, the B gear 232 and the C gear 233, the C gear 233 and the D gear 234 always keep in a state of mutual meshing, so that the upper pressing roller 210 is relatively rotated. When the lower pressing roller 220 moves, the synchronous rotation between the upper pressing roller 210 and the lower pressing roller 220 can also be ensured, and the rotation directions of the upper pressing roller 210 and the lower pressing roller 220 are opposite, so as to ensure that when conveying multiple layers of cloth, the upper and lower layers of cloth are prevented from moving in opposite directions relative to each other under the friction between the upper pressing roller 210 and the lower pressing roller 220, so as to prevent the cloth from wrinkling. In order to ensure that the rotation speeds of the upper pressing roller 210 and the lower pressing roller 220 are consistent, the A gear 231 and the D gear 234 can be set to the same type of gears, and the B gear 232 and the C gear 233 can be set to the same type of gears; The two sets of clamping mechanisms 200 are symmetrically arranged on the fixed plate 100, and respectively include an upper pressing roller 210 and a lower pressing roller 220. Through the linkage of the gear transmission system (A gear 231, B gear 232, C gear 233, D gear 234) in the A driving mechanism 230 and the connecting rod assembly (A connecting rod 235, B connecting rod 236, transmission shaft 237), it is ensured that the upper pressing roller 210 and the lower pressing roller 220 rotate synchronously in opposite directions and at the same speed. The rotating driving member 238 drives the lower pressing roller 220 to rotate, and transmits power to the upper pressing roller 210 through gear transmission, thereby avoiding relative sliding of multiple layers of fabrics due to differences in friction, and effectively eliminating the generation of wrinkles.

[0025] In one embodiment of the present invention, the rotary drive member 238 is a rotary cylinder and a motor. The rotary drive member 238 is fixedly installed at the bottom of the fixed plate 100. The output shaft end of the rotary drive member 238 is connected to the end of the lower pressure roller 220 through a transmission belt. The output shaft of the rotary drive member 238 and the end of the lower pressure roller 220 are both sleeved with transmission wheels. The two transmission wheels are sleeved with the same transmission belt. The rotary drive member 238 drives the lower pressure roller 220 to rotate through the transmission belt. In one embodiment of the present invention, the B driving mechanism 300 includes a U-shaped frame 301 and an A telescopic driving member 302, the A telescopic driving member 302 is a telescopic cylinder or a hydraulic cylinder, the two ends of the upper pressure roller 210 are respectively rotatably connected to the U-shaped frame 301, the two sides of the U-shaped frame 301 are respectively slidably connected to the fixed plate 100, the bottom end of the U-shaped frame 301 is fixedly connected to the A telescopic driving member 302, and the fixed end of the A telescopic driving member 302 is fixedly connected to the fixed plate 100; Specifically, when the moving end of the A telescopic driving member 302 is extended and retracted, the U-shaped frame 301 is driven to move, and the U-shaped frame 301 drives the upper pressing roller 210 connected thereto to move, thereby realizing the function of the upper pressing roller 210 and the lower pressing roller 220 on the side away from the adjusting roller 400 to press the cloth, and the pressing force on the cloth can be adjusted by adjusting the extension amount of the moving end of the A telescopic driving member 302. By adjusting the extension amount of the moving end of the A telescopic driving member 302, we can accurately adjust the pressing force on the cloth to meet different sewing needs.

[0026] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8In one embodiment of the present invention, the driving component 510 includes a mobile driving component and two groups of B driving components, the two groups of B driving components are symmetrically arranged at both ends of the adjusting roller 400, the B driving component includes an A connecting component 511, a B connecting component 512, a mobile gear 513, a support frame 514, a support seat 515 and two racks 516, the top end of the A connecting component 511 is connected to the end of the adjusting roller 400, the bottom end of the A connecting component 511 is connected to one of the racks 516, the top ends of the A connecting component 511 and the B connecting component 512 are connected to the upper pressure roller on one side thereof 210 end is rotatably connected, the bottom end of the B connecting member 512 is fixedly connected to another rack 516, the two sides of the two racks 516 that are away from each other are slidably connected to the support frame 514, the top of the support frame 514 is fixedly connected to the fixed plate 100, the moving gear 513 is arranged between the two racks 516, and the two sides of the moving gear 513 are respectively connected to the two racks 516, the moving gear 513 is rotatably installed on the support seat 515, and one side of the support seat 515 is connected to a moving driving member for driving the support seat 515 to move along the length direction of the rack 516; Specifically, when the mobile driving member drives the support seat 515 to move downward along the length direction of the rack 516 (i.e., the direction perpendicular to the upper surface of the fixed plate 100), the support seat 515 drives the moving gear 513 to move downward, and the moving gear 513 drives the two racks 516 to move downward synchronously, and the two racks 516 drive the adjusting roller 400 and the upper pressure roller 210 on one side of the adjusting roller 400 to move downward synchronously through the A connecting member 511 and the B connecting member 512 respectively. After the upper pressure roller 210 moves to A (the extreme position), , the B connecting member 512 and the rack 516 connected to the B connecting member 512 cannot move downward. At this time, the moving gear 513 continues to move downward. Under the action of the rack 516 that cannot move downward, the moving gear 513 rotates while moving downward. The moving gear 513 drives another rack 516 to move downward faster. The other rack 516 drives the adjusting roller 400 to move downward through the A connecting member 511. The adjusting roller 400 presses the cloth downward. At this time, the tension of the cloth can be adjusted by adjusting the downward movement of the adjusting roller 400. The compound driving logic of the C driving mechanism 500 is: The driving component 510 realizes the linkage downward pressing of the adjusting roller 400 and the upper pressing roller 210 through the meshing transmission of the moving gear 513 and the rack 516. When the upper pressing roller 210 reaches point A, the moving gear 513 continues to move downward under the drive of the support seat 515, driving the adjusting roller 400 to press the cloth downward alone to form tension.

[0027] In one embodiment of the present invention, in order to enable the adjusting roller 400 and the upper pressure roller 210 on one side of the adjusting roller 400 to automatically reset, a blocking member 600 can be provided on the support frame 514 at the top of the rack 516 located at the bottom of the upper pressure roller 210. The blocking member 600 is used to prevent the rack 516 from continuing to move upward when it moves to the initial position. When the moving gear 513 moves upward, the moving gear 513 drives the two racks 516 to move upward synchronously. After the rack 516 located at the bottom of the upper pressure roller 210 contacts the blocking member 600, the rack 516 cannot continue to move upward. At this time, the moving gear 513 continues to move upward, and the moving gear 513 drives the other rack 516 to move to the initial position, thereby realizing the automatic reset of the adjusting roller 400 and the upper pressure roller 210 on one side of the adjusting roller 400; In one embodiment of the present invention, the A connecting member 511 is provided in an integral shape, so that the A connecting member 511 is both strong and durable, the top end of the A connecting member 511 is rotatably connected to the end of the adjusting roller 400, and the bottom end of the A connecting member 511 is fixedly connected to the rack 516 located at the bottom thereof; In one embodiment of the present invention, the A connecting member 511 includes a connecting sleeve 5111 and an A screw 5112, the top end of the connecting sleeve 5111 is rotatably connected to the end of the adjusting roller 400, the inner side wall of the connecting sleeve 5111 is threadedly connected to the A screw 5112, and the bottom end of the A screw 5112 is rotatably connected to the rack 516 located at the bottom thereof; Specifically, the threaded adjustment design of the A connecting member 511 (connecting sleeve 5111 and A screw 5112) supports fine adjustment of the initial height of the adjusting roller 400. Combined with the precise stroke control of the B telescopic driving member 518, the tension can be dynamically adjusted for elastic or rigid fabrics. By rotating the A screw 5112, the A screw 5112 drives the connecting sleeve 5111 to move up and down, and the connecting sleeve 5111 drives the adjusting roller 400 to move up and down, so that the initial position of the adjusting roller 400 can be adjusted, and when the adjusting roller 400 presses down on the fabric to tighten the fabric, the adjusting roller 400 can be moved slightly, and the degree of downward pressure of the adjusting roller 400 can be manually corrected, so that the tension of the fabric can be adjusted more accurately.

[0028] See also Figure 5 and Figure 8 In one embodiment of the present invention, the mobile driving member includes a mobile frame 517 and a B telescopic driving member 518, the B telescopic driving member 518 is a telescopic cylinder or a hydraulic cylinder, the upper surface of the mobile frame 517 is fixedly connected to the support seat 515, the mobile end of the B telescopic driving member 518 is fixedly connected to the mobile frame 517, and the fixed end of the B telescopic driving member 518 is fixedly connected to the fixed plate 100; Specifically, when the moving end of the B telescopic driving member 518 is extended or retracted, it drives the moving frame 517 to move up and down, the moving frame 517 drives the supporting seat 515 to move up and down, and the supporting seat 515 drives the moving gear 513 installed thereon to move up and down, thereby realizing the precise movement of the moving gear 513.

[0029] See also Figure 4 and Figure 8 In one embodiment of the present invention, the limiting component 520 includes two sets of limiting components, which are respectively installed on two support frames 514, and the limiting components include a B screw 521 and a blocking block 522. The outer wall of the B screw 521 is threadedly connected to the support frame 514, the top of the B screw 521 is rotatably connected to the blocking block 522, and one side of the blocking block 522 is slidably connected to the support frame 514; Specifically, the blocking block 522 is used to block the rack 516 at its top from moving downward, that is, the extreme position (A) of the rack 516 at the bottom of the upper pressure roller 210 located on one side of the adjusting roller 400 moving downward. By rotating the B screw 521, the B screw 521 moves up and down relative to the support frame 514, and the B screw 521 drives the blocking block 522 to move up and down, so that the height of the extreme position (A) of the downward movement of the upper pressure roller 210 located on one side of the adjusting roller 400 can be adjusted, so that it can be suitable for fabrics of different thicknesses.

[0030] B driving mechanism 300 cooperates with limiting component 520: The B driving mechanism 300 drives the upper pressing roller 210 to move vertically through the U-shaped frame 301 and the A telescopic driving member 302, and adjusts the distance between the upper pressing roller 210 and the lower pressing roller 220 to meet the pressing requirements of fabrics of different thicknesses; The screw rod B 521 and the blocking block 522 in the limiting component 520 can dynamically adjust the limit position (position A) of the upper pressing roller 210 to move downward, and accurately control the pressing force to avoid excessive squeezing and damaging the fabric.

[0031] In one embodiment of the present invention, the outer parts of the upper pressing roller 210 and the lower pressing roller 220 are coated with an anti-skid layer to prevent the fabric from sliding relative to the upper pressing roller 210 and the lower pressing roller 220 when the industrial sewing machine sews multiple layers of fabric.

[0032] In one embodiment of the present invention, the outer parts of the upper pressing roller 210 and the lower pressing roller 220 are provided with a plurality of strip-shaped protrusions to prevent the fabric from sliding relative to the upper pressing roller 210 and the lower pressing roller 220 when the industrial sewing machine sews multiple layers of fabric.

[0033] In one embodiment of the present invention, a corresponding control unit can be set for use. The control unit can select any controller to be connected to the electrical components in the present application, so as to control the opening and closing operation of each electrical component. This part is the prior art. Here, a single-chip microcomputer can be provided as a control unit for display. The single-chip microcomputer in this embodiment is a typical embedded microcontroller (Microcontroller Unit), which is composed of an arithmetic unit, a controller, a memory, an input and output device, etc., which is equivalent to a microcomputer. Compared with the general-purpose microprocessor used in personal computers, it emphasizes self-supply (no external hardware) and cost saving. Its biggest advantage is that it is small in size and can be placed inside the instrument, but it has a small storage capacity, a simple input and output interface, and low functional consumption.

[0034] In summary, the present application completely eliminates the speed difference between the upper and lower layers of fabric by synchronously rotating the upper pressing roller 210 and the lower pressing roller 220 in opposite directions, thereby avoiding the generation of wrinkles; Through the cooperation of the B driving mechanism 300, the limiting component 520 and the C driving mechanism 500, the "one-button" adjustment of the pressing force and the tension is achieved to adapt to various sewing scenarios; The gear-connecting rod transmission system and the modular drive assembly are integrated into the fixed plate (100), which has a compact structure and is easy to maintain, and is compatible with fabrics of different thicknesses and materials (such as elastic fabrics, denim, etc.), meeting the complex sewing needs in the fields of clothing, home textiles, etc.; The fabric pressing mechanism proposed in this application can be widely used in industrial sewing machines, automatic quilting equipment and multi-layer composite material sewing production lines, and is particularly suitable for high-precision automotive interiors, medical textile products and high-end clothing processing fields, significantly improving product yield and production efficiency.

[0035] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A cloth pressing mechanism for an industrial sewing machine, comprising a fixing plate (100) mounted on a frame of the industrial sewing machine, characterized in that: Also includes: Two clamping mechanisms (200) are used to clamp the cloth. Both clamping mechanisms (200) are mounted on the fixed plate (100). The clamping mechanisms (200) include an upper pressing roller (210), a lower pressing roller (220) and an A driving mechanism (230). The rotating shafts at both ends of the lower pressing roller (220) are rotatably connected to the fixed plate (100). Both ends of the upper pressing roller (210) and the lower pressing roller (220) are respectively connected to the A driving mechanism (230). The A driving mechanism (230) is used to drive the upper pressing roller (210) and the lower pressing roller (220) to rotate around their respective axes, and the rotation directions of the upper pressing roller (210) and the lower pressing roller (220) are opposite. A B driving mechanism (300), one side of which is connected to an upper pressing roller (210) in one of the clamping mechanisms (200), the B driving mechanism (300) being used to drive the upper pressing roller (210) connected thereto to move in a direction perpendicular to the upper surface of the fixed plate (100); An adjusting roller (400) is arranged on a side of another clamping mechanism (200), and the adjusting roller (400) is used to adjust the tension of the cloth; A C driving mechanism (500) mounted on the fixed plate (100), the C driving mechanism (500) comprising a driving component (510) and a limiting component (520), the driving component (510) being capable of driving the adjusting roller (400) and an upper pressing roller (210) on one side of the adjusting roller (400) to move in a direction perpendicular to the upper surface of the fixed plate (100); The upper pressing roller (210) on one side of the adjusting roller (400) is capable of moving downward in a direction perpendicular to the upper surface of the fixing plate (100), and the limit position of its downward movement is position A; The limiting component (520) is used to adjust the height of point A. When the driving component (510) drives the upper pressure roller (210) on one side of the adjusting roller (400) to move downward to point A, the driving component (510) drives the adjusting roller (400) to move downward relative to the upper pressure roller (210) on one side of the adjusting roller (400) in a direction perpendicular to the upper surface of the fixing plate (100).

2. A cloth pressing mechanism for an industrial sewing machine according to claim 1, characterized in that: The A drive mechanism (230) comprises a rotating drive member (238) and two groups of A drive components. The two groups of A drive components are symmetrically arranged on both sides of the upper pressure roller (210). The A drive component comprises an A gear (231), a B gear (232), a C gear (233), a D gear (234), an A connecting rod (235), a B connecting rod (236) and a transmission shaft (237). The A gear (231) is fixedly sleeved on the end of the upper pressure roller (210). One side of the A gear (231) is meshed with the B gear (232). The B gear (232) is rotatably mounted on the A connecting rod (235) via a rotating shaft. One end of the A connecting rod (235) is engaged with the upper pressure roller (210). 0), the other end of the A connecting rod (235) is rotatably connected to one end of the B connecting rod (236) through a transmission shaft (237), the other end of the B connecting rod (236) is rotatably connected to the end of the lower pressure roller (220), the C gear (233) is rotatably sleeved on the outside of the transmission shaft (237), one side of the C gear (233) is meshed with the B gear (232), and the other side of the C gear (233) is meshed with the D gear (234), the D gear (234) is fixedly sleeved on the end of the lower pressure roller (220), and one end of the lower pressure roller (220) is connected to a rotating drive member (238) for driving the lower pressure roller (220) to rotate around its own axis.

3. The cloth pressing mechanism for an industrial sewing machine according to claim 1, characterized in that: The B driving mechanism (300) comprises a U-shaped frame (301) and an A telescopic driving member (302); the two ends of the upper pressing roller (210) are respectively rotatably connected to the U-shaped frame (301); the two sides of the U-shaped frame (301) are respectively slidably connected to the fixed plate (100); the bottom end of the U-shaped frame (301) is fixedly connected to the A telescopic driving member (302); and the fixed end of the A telescopic driving member (302) is fixedly connected to the fixed plate (100).

4. The cloth pressing mechanism for an industrial sewing machine according to claim 1, characterized in that: The driving component (510) comprises a moving driving component and two groups of B driving components. The two groups of B driving components are symmetrically arranged at the two ends of the adjusting roller (400). The B driving component comprises an A connecting component (511), a B connecting component (512), a moving gear (513), a support frame (514), a support seat (515) and two racks (516). The top end of the A connecting component (511) is connected to the end of the adjusting roller (400), the bottom end of the A connecting component (511) is connected to one of the racks (516), and the top ends of the A connecting component (511) and the B connecting component (512) are connected to the end of the upper pressure roller (210) on one side thereof. The bottom end of the B connecting member (512) is fixedly connected to another rack (516), the two sides of the two racks (516) that are separated from each other are slidably connected to the support frame (514), the top of the support frame (514) is fixedly connected to the fixed plate (100), the moving gear (513) is arranged between the two racks (516), and the two sides of the moving gear (513) are respectively connected to the two racks (516), the moving gear (513) is rotatably mounted on the support seat (515), and one side of the support seat (515) is connected to a moving driving member for driving the support seat (515) to move along the length direction of the rack (516).

5. A cloth pressing mechanism for an industrial sewing machine according to claim 4, characterized in that: The A connecting member (511) is provided in an integral shape, the top end of the A connecting member (511) is rotatably connected to the end of the adjusting roller (400), and the bottom end of the A connecting member (511) is fixedly connected to a rack (516) located at the bottom thereof.

6. A cloth pressing mechanism for an industrial sewing machine according to claim 4, characterized in that: The A connecting member (511) comprises a connecting sleeve (5111) and an A screw rod (5112); the top end of the connecting sleeve (5111) is rotatably connected to the end of the adjusting roller (400); the inner side wall of the connecting sleeve (5111) is threadedly connected to the A screw rod (5112); and the bottom end of the A screw rod (5112) is rotatably connected to a rack (516) located at the bottom thereof.

7. A cloth pressing mechanism for an industrial sewing machine according to claim 4, characterized in that: The mobile driving member comprises a mobile frame (517) and a B telescopic driving member (518); the upper surface of the mobile frame (517) is fixedly connected to the support seat (515); the mobile end of the B telescopic driving member (518) is fixedly connected to the mobile frame (517); and the fixed end of the B telescopic driving member (518) is fixedly connected to the fixed plate (100).

8. The cloth pressing mechanism for an industrial sewing machine according to claim 4, characterized in that: The limiting component (520) comprises two sets of limiting components, which are respectively mounted on two support frames (514). The limiting components comprise a B screw rod (521) and a blocking block (522). The outer wall of the B screw rod (521) is threadedly connected to the support frame (514), the top end of the B screw rod (521) is rotatably connected to the blocking block (522), and one side of the blocking block (522) is slidably connected to the support frame (514).

9. The cloth pressing mechanism for an industrial sewing machine according to claim 1, characterized in that: The exteriors of the upper pressing roller (210) and the lower pressing roller (220) are both coated with an anti-slip layer.

10. The cloth pressing mechanism for an industrial sewing machine according to claim 1, characterized in that: The outer parts of the upper pressing roller (210) and the lower pressing roller (220) are both provided with a plurality of strip-shaped protrusions.

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