A clamp assembly and a cloth pulling and clamping device of a towel cloth splitting machine

Abstract

The utility model belongs to towel cloth processing equipment technical field, concretely relates to clamp plate subassembly and towel cloth slitting machine cloth pull clamp device. The clamp plate subassembly includes the upper clamp plate and lower clamp plate of parallel workbench face setting, be equipped with a plurality of drive components for providing the perpendicular workbench face direction push -and -pull power to drive the upper clamp plate and lower clamp plate to each other close or far apart between the upper clamp plate and lower clamp plate. The utility model keeps the same force line in the closing process through the middle upper and lower clamp plate, and the clamping force distribution is uniform, effectively avoids the cloth deviation, wrinkle or damage. Meanwhile, the utility model provides a kind of cloth pull clamp device of towel cloth slitting machine of the foregoing clamp plate subassembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of towel fabric processing equipment, specifically relating to clamping plate components and fabric clamping devices for towel fabric slitting machines. Background Technology

[0002] The towel clamping device is a key component in automated towel production equipment. Its clamping stability directly affects the accuracy and reliability of subsequent processes such as fabric stretching, cutting, handling, and sewing.

[0003] In related technologies, such as CN207891548U, a rotating opening and closing clamping plate assembly is disclosed, including an upper clamping plate, a lower clamping plate, a gripping joint, and a transmission arm. This structure uses a cylinder to drive the transmission arm to rotate, which in turn drives the gripping joint to rotate the lower clamping plate around an axis to achieve clamping or releasing. However, this structure has the following inherent drawbacks: Because the lower clamping plate achieves clamping by rotation, the clamping force is distributed non-linearly from the axis of rotation to the end of the gripper. This can easily lead to stress concentration or insecure clamping of the towel fabric, which in turn can cause fabric shifting, wrinkles, or even damage, affecting processing quality and equipment stability. Utility Model Content

[0004] The purpose of this utility model is to provide a clamping plate assembly with uniform clamping force that is compatible with automated processing equipment and a fabric pulling clamping device for a towel cloth slitting machine.

[0005] In a first aspect, this utility model provides a clamping plate assembly, the specific technical solution of which is as follows: A clamping plate assembly includes an upper clamping plate and a lower clamping plate arranged parallel to a worktable surface. A plurality of driving components are provided between the upper clamping plate and the lower clamping plate to provide pushing and pulling force in a direction perpendicular to the worktable surface, so as to drive the upper clamping plate and the lower clamping plate to move closer or further apart from each other.

[0006] The fundamental problem with existing (rotation-opening) clamp assemblies is that their power transmission path is non-linear and indirect. 1. The cylinder drives the transmission arm, which acts as a lever arm, causing the gripping joint to rotate around its axis. According to the lever principle, the torque is greatest at the axis of rotation. However, when this torque is actually converted into a clamping force on the fabric, the force distribution from the axis to the end of the gripper is uneven. The gripping force is tighter near the axis and may be looser further away, resulting in a "non-linear distribution of clamping force".

[0007] 2. During the closing motion of the rotation, a lateral, scraping force acts on the fabric. For soft, fluffy terry cloth, this lateral force can easily cause the fabric to shift, pile up, or wrinkle before it is clamped.

[0008] 3. The force is transmitted through a transmission chain from the cylinder to the transmission arm, then to the gripping joint, and finally to the lower clamping plate. This transmission chain is relatively long and has many joints and connection points, which can lead to cumulative errors and wear risks, affecting the stability and accuracy of long-term use.

[0009] The solution provided in this application effectively addresses the aforementioned problems: 1. The power generated by the drive component (such as a cylinder) is a linear motion strictly perpendicular to the worktable surface. This vertical force acts directly and simultaneously on the upper and lower clamping plates through the drive component. Because the force is in the same direction and there is no rotating arm, the clamping force is evenly distributed across the entire clamping surface, solving the problems of "local stress concentration" and "weak clamping".

[0010] 2. The upper and lower clamps only have linear motion, moving "up-down" or "nearer-farther," without any lateral or rotational components. During clamping, no lateral scraping force is generated on the fabric that could cause it to move. The fabric's position does not change when clamped, thus solving the problems of fabric shifting and wrinkling, which is crucial for ensuring the accuracy of fabric stretching to the correct length.

[0011] 3. This application simplifies the complex indirect transmission from "cylinder → transmission arm → joint" to a direct transmission from "drive component → direct push and pull," resulting in a more compact structure and better rigidity. The reduction in moving joints and hinge points significantly reduces errors caused by wear and clearances, leading to higher long-term stability, more accurate repeatability, and a longer service life for the equipment.

[0012] Furthermore, the driving component is disposed on the lower clamping plate; a first vertical plate perpendicular to the upper clamping plate is provided on one side of the upper clamping plate, and the side of the first vertical plate away from the upper clamping plate is bent to form a folded edge; the driving end of the driving component is connected to the folded edge.

[0013] In this application, the first vertical plate and the folded edge together form a reinforcing rib structure, which enhances the bending and torsional stiffness of the upper clamping plate at the driving point and is more conducive to ensuring the parallelism of the clamping surface. Even if the driving point is not in the exact center, the "L"-shaped structure formed by the first vertical plate and the folded edge can ensure that the force is evenly distributed, preventing the upper clamping plate from warping on one side when under pressure, thereby ensuring uniform pressure on the entire clamping surface.

[0014] Furthermore, in this application, the moving parts (drive components, upper and lower clamping plates) are integrated into a compact module. This clamping plate assembly can be directly mounted as a complete unit to an external electric cylinder module or a three-axis slide. The external motion mechanism only needs to provide movement for the entire assembly, without the need to provide separate air circuit sliding joints or circuit slip rings for its internal drive source (cylinder) (because the cylinder moves with the lower clamping plate, and the air circuit can be fixedly connected to the moving lower clamping plate), simplifying the external structural design and piping layout.

[0015] Furthermore, the folded edge and the upper clamping plate are located on the same side of the first vertical plate. The driving end of the driving component presses upward against the folded edge. If the folded edge were located on the other side of the first vertical plate (forming a "Z" shape), the driving end pressing against the folded edge would generate an additional bending moment on the first vertical plate. This bending moment would cause the first vertical plate to tend to bend backward, which could lead to a slight tilting or twisting of the upper clamping plate when it is lifted, thus disrupting the parallelism of the clamping. The "same side" design of this application helps to eliminate this harmful moment.

[0016] Furthermore, the lower clamping plate has a second vertical plate perpendicular to the lower clamping plate on its side, and the second vertical plate and the folded edge are located on both sides of the first vertical plate; the upper clamping plate has a clearance opening for installing the driving component.

[0017] Furthermore, it also includes several connectors fixed to the second vertical plate. Each connector has a guide surface that abuts against the first vertical plate and is used to limit the vertical movement trajectory of the upper clamping plate. The rigid guide surface of the connector abuts against the first vertical plate, which helps to eliminate the possibility that the cylinder thrust, mechanism clearance, and machining errors may still cause slight swaying or twisting of the upper clamping plate during the upward movement. This further ensures that the upper clamping plate (or lower clamping plate) will not wobble or deviate during vertical movement, guaranteeing the purity and precision of the movement.

[0018] Furthermore, the upper clamping plate includes a rectangular first plate and a plurality of first protruding teeth evenly spaced along the length of the first plate on the side of the first plate; the lower clamping plate includes a rectangular second plate and a plurality of second protruding teeth evenly spaced along the length of the second plate on the side of the second plate; the positions of the first protruding teeth and the second protruding teeth correspond one-to-one.

[0019] In existing technologies, uneven clamping force can cause uneven "biting" effect of the protruding teeth, resulting in inconsistent biting depth. In this application, uniform vertical clamping force ensures that all first and second protruding teeth can simultaneously and evenly "bite" into the fabric, working together to maximize the anti-slip effect and ensure absolute reliability when pulling the fabric at high speed.

[0020] Furthermore, several of the driving components are symmetrically distributed on both sides of the central axis perpendicular to the long side of the first plate to ensure the balance of the clamping force.

[0021] Furthermore, the driving component is a cylinder, a hydraulic cylinder, or a linear motor.

[0022] Furthermore, both the first and second protruding teeth are rounded to reduce damage to the fabric.

[0023] Secondly, the present invention provides a fabric clamping device for a towel fabric slitting machine, comprising several clamping plate assemblies as described above, and a three-axis motion slide; the clamping plate assemblies are connected to the three-axis motion slide and can be driven to move by the three-axis motion slide; the several clamping plate assemblies are arranged in a linear array, suitable for clamping and conveying towel fabrics of different widths.

[0024] This utility model has the following beneficial effects: This invention employs a driving method perpendicular to the worktable surface, ensuring that the upper and lower clamping plates maintain the same force direction during the closing process, resulting in uniform clamping force distribution and effectively preventing fabric shifting, wrinkling, or damage. Simultaneously, the convex tooth structure and symmetrically arranged driving components further enhance clamping stability and adaptability, significantly improving the quality and efficiency of automated terry cloth processing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the clamping plate assembly in Embodiment 1 of this utility model; Figure 2 for Figure 1 Enlarged view of section A; Figure 3 This is a cross-sectional view (left view angle) of the clamping plate assembly in Embodiment 1 of this utility model; Figure 4 This is a top-view sectional view of the clamping plate assembly in Embodiment 2 of this utility model; Figure 5 for Figure 4 Enlarged view of section B; Figure 6 This is a schematic diagram of the fabric clamping device of a towel cloth slitting machine, which is an application example of this utility model.

[0026] Explanation of reference numerals in the attached figures: 1. Upper clamping plate; 11. First plate body; 12. First protruding tooth; 13. Clearance opening; 2. First vertical plate; 3. Folded edge; 4. Lower clamping plate; 41. Second plate body; 42. Second protruding tooth; 43. Reinforcing rib; 5. Second vertical plate; 6. Driving component; 7. Connecting component; 71. Guide surface; 8. Adapter component; 9. Limiting block; 91. Ball bearing. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this utility model, the present application will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1: A clamping assembly, as shown in the reference Figure 1It includes an upper clamping plate 1 and a lower clamping plate 4 arranged parallel to the workbench surface. The upper clamping plate 1 and the lower clamping plate 4 are parallel to each other. The upper clamping plate 1 includes a rectangular first plate body 11 and a plurality of first protruding teeth 12 arranged on one long side, with the first protruding teeth 12 evenly spaced along the length direction of the first plate body 11. The lower clamping plate 4 includes a rectangular second plate body 41 and a plurality of second protruding teeth 42 arranged on one long side, with the second protruding teeth 42 evenly spaced along the length direction of the second plate body 41. The positions of the first protruding teeth 12 and the second protruding teeth 42 are one-to-one, and the tooth tips of both are rounded and their ends are aligned.

[0029] Reference Figure 1 and Figure 2 A first vertical plate 2 is disposed on the long side of the first plate 11 opposite to the side with the first protruding tooth 12. The first vertical plate 2 is perpendicular to the first plate 11. The side of the first vertical plate 2 away from the first plate 11 is bent to form a folded edge 3, which is perpendicular to the first vertical plate 2 and parallel to the first plate 11. That is, the first plate 11 and the folded edge 3 are both located on the same side of the first vertical plate 2.

[0030] Reference Figure 1 and Figure 2 The top surface of the lower clamping plate 4 is provided with several driving components 6 for providing pushing and pulling power in a direction perpendicular to the first plate 11. The driving components 6 can be selected from any one of a cylinder, a hydraulic cylinder, or a linear motor. In this embodiment, the driving component 6 is a cylinder fixed to the lower clamping plate 4, and the driving end of the cylinder is fixedly connected to the folded edge 3. The first plate 11 has a clearance opening 13 for installing the driving components 6. In this embodiment, the clearance opening 13 extends to the first vertical plate 2, so that the upper clamping plate 1 can move up and down relative to the lower clamping plate 4.

[0031] Reference Figure 1 and Figure 2 The number of driving components 6 can be selected according to actual needs. To ensure the balance of clamping force, several driving components 6 are symmetrically distributed on both sides of the central axis perpendicular to the long side of the first plate 11. In this embodiment, only two sets of driving components 6 that can provide push and pull power synchronously are provided.

[0032] Reference Figure 1 and Figure 2 The second plate 41 is slightly wider than the first plate 11, and a second vertical plate 5 is provided on its long side away from the second protrusion 42. The second vertical plate 5 and the second plate 41 are integrally formed. The second vertical plate 5 is perpendicular to the first plate 11 and parallel to the first vertical plate 2, so that a gap is formed between the first vertical plate 2 and the second vertical plate 5.

[0033] Reference Figure 1 , Figure 2 and Figure 3A pair of connectors 7 are fixedly mounted on the second vertical plate 5. In this embodiment, the connectors 7 are rod-shaped and located in the gap between the first vertical plate 2 and the second vertical plate 5. The connectors 7 are fixedly installed on the second vertical plate 5 by bolts, and their side facing away from the second vertical plate 5 abuts against the first vertical plate 2, forming a guide surface 71 for restricting the vertical movement trajectory of the first vertical plate 2. This ensures that the upper clamping plate 1 can only move relative to the lower clamping plate 4 in the vertical direction.

[0034] Reference Figure 1 , Figure 2 and Figure 3 In this embodiment, the moving parts (drive component 6, upper clamping plate 1, and lower clamping plate 4) are integrated into a compact module. The clamping plate assembly can be directly mounted as a complete unit to an external electric cylinder module or a three-axis slide. Furthermore, an adapter 8 can be provided at the top of the connector 7 for mounting the clamping plate assembly.

[0035] The working principle of this embodiment: When the driving component 6 provides pushing force, the upper clamping plate 1 and the lower clamping plate 4 separate, forming an opening for flat fabrics such as terry cloth to be inserted; when the driving component 6 provides pulling force, the upper clamping plate 1 presses down relative to the lower clamping plate 4, clamping the fabric; then, with the cooperation of the three-axis slide, pulling and other operations are performed. Unlike existing rotating opening and closing clamping plate assemblies, the vertical power provided by the driving component 6 acts directly and simultaneously on the upper and lower clamping plates 4, and the clamping force is evenly distributed across the entire clamping surface, effectively solving the problems of "local stress concentration" and "weak clamping." At the same time, since the upper and lower clamping plates 4 only have linear motion of "up-down" or "near-far," without lateral or rotational motion components, no lateral scraping force is generated on the fabric during clamping that would cause it to move. The fabric's position does not change when clamped, thus solving the problems of "fabric offset and wrinkles," which is crucial for ensuring the accuracy of fabric stretching to a fixed length. Furthermore, the streamlined and compact structural design of this application provides high rigidity, reduces the number of moving joints and hinge points, significantly reduces errors caused by wear and clearance, and results in higher long-term stability and repeatability of the equipment, as well as a longer service life.

[0036] Example 2: Example 2 is based on Example 1, with reference to Figure 4 and Figure 5The difference lies in the following: To further enhance the torsional resistance of the upper clamping plate 1 and the lower clamping plate 4, several triangular reinforcing ribs 43 are provided at intervals at the connection between the first plate 11 and the first vertical plate 2, and at the connection between the second plate 41 and the second vertical plate 5. Simultaneously, several pairs of limiting blocks 9 are provided on the side of the first vertical plate 2. The same pair of limiting blocks 9 are symmetrically distributed on both sides of the connector 7, and the side of the limiting blocks 9 is provided with several rollers or balls 91 that abut against the side of the connector 7; in this embodiment, balls 91 are used. Thus, with the cooperation of the balls 91, the side of the connector 7, and the guide surface 71 with the first vertical plate 2, the stability of the relative movement of the first plate 11 and the second plate 41 in the vertical direction can be further improved.

[0037] Application example: A fabric clamping device for a terry cloth slitting machine includes a three-axis slide and several clamping plate assemblies mounted on the three-axis slide. The clamping plate assemblies are those of Embodiment 1 or Embodiment 2. A suitable number of clamping plate assemblies are arranged in a linear array according to the width of the terry cloth to be processed.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A clamping plate assembly, comprising an upper clamping plate (1) and a lower clamping plate (4) arranged parallel to a worktable surface, characterized in that: A plurality of drive components (6) are provided between the upper clamping plate (1) and the lower clamping plate (4) to provide pushing and pulling force in a direction perpendicular to the worktable surface, so as to drive the upper clamping plate (1) and the lower clamping plate (4) to move closer or further away from each other; The driving component (6) is disposed on the lower clamping plate (4); a first vertical plate (2) perpendicular to the upper clamping plate (1) is provided on one side of the upper clamping plate (1), and the side of the first vertical plate (2) away from the upper clamping plate (1) is bent to form a folded edge (3); the driving end of the driving component (6) is connected to the folded edge (3). The folded edge (3) and the upper clamping plate (1) are located on the same side of the first vertical plate (2); The lower clamping plate (4) has a second vertical plate (5) perpendicular to the lower clamping plate (4) on its side, and the second vertical plate (5) and the folded edge (3) are located on both sides of the first vertical plate (2); the upper clamping plate (1) has a clearance opening (13) for installing the driving component (6); It also includes several connectors (7) fixed to the second vertical plate (5), and each connector (7) has a guide surface (71) that abuts against the first vertical plate (2) and is used to limit the movement trajectory of the upper clamping plate (1) in the vertical direction.

2. The clamping plate assembly according to claim 1, characterized in that: The upper clamping plate (1) includes a rectangular first plate (11) and a plurality of first protruding teeth (12) evenly spaced along the length of the first plate (11) on the side of the first plate (11); the lower clamping plate (4) includes a rectangular second plate (41) and a plurality of second protruding teeth (42) evenly spaced along the length of the second plate (41) on the side of the second plate (41); the positions of the first protruding teeth (12) and the second protruding teeth (42) correspond one-to-one.

3. The clamping plate assembly according to claim 2, characterized in that: Several of the drive components (6) are symmetrically distributed on both sides of the central axis perpendicular to the long side of the first plate (11).

4. The clamping plate assembly according to claim 3, characterized in that: The drive component (6) is any one of a cylinder, a hydraulic cylinder, or a linear motor.

5. A fabric clamping device for a towel fabric slitting machine, characterized in that: Includes the clamping assembly as described in any one of claims 1-4.

6. The fabric clamping device for a towel fabric slitting machine according to claim 5, characterized in that: It also includes a three-axis motion slide; the clamping plate assembly is connected to the three-axis motion slide and can be moved by the three-axis motion slide; several clamping plate assemblies are arranged in a linear array.

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