Leather thickness detection roller module

Abstract

The utility model belongs to leather thickness detection technical field, specifically disclose a leather thickness detection gyro wheel module, including fixed portal, gyro wheel group and displacement detector, gyro wheel group includes the upper gyro wheel and lower gyro wheel of installation in fixed portal in turn from top to bottom along the longitudinal direction, the upper gyro wheel can be driven and is close to or far from lower gyro wheel, and the upper gyro wheel is set up in the work elastic compression in lower gyro wheel, displacement detector is installed in fixed portal, and displacement detector is used for monitoring the relative displacement of the central axis of upper gyro wheel and lower gyro wheel, realized the accurate measurement to leather thickness, solved the big error of traditional thickness gauge manual reading, the unstable pressure of presser foot pressure leads to the measurement deviation and the problem of leather deformation influence measurement accuracy, and has the advantages of improving measurement accuracy, realizing automatic detection and reducing leather deformation.

Description

Technical Field

[0001] This invention belongs to the field of leather thickness detection technology, and particularly relates to a leather thickness detection roller module. Background Technology

[0002] In leather production, thickness measurement is a crucial step in quality control, directly affecting the uniformity, strength, and subsequent processing performance of the product. In actual leather production, devices such as mechanical thickness gauges, electronic thickness gauges, and laser thickness gauges are used to measure the thickness of the leather.

[0003] Although existing thickness measurement technologies are relatively mature, the following problems still exist:

[0004] 1) Manual measurement leads to large errors: Traditional thickness gauges rely on operators to take manual readings in a short time. Due to individual differences in operator reaction time, measurement errors are easily caused. In addition, if the pressure of the pressure foot of the mechanical thickness gauge does not meet the standard, it will also lead to measurement deviation.

[0005] 2) Leather deformation affects measurement results: The pressure foot area of ​​the mechanical thickness gauge is small (usually 10mm in diameter), which may squeeze the leather and cause the measured value to be too small; the surface of newly produced leather is uneven, and if it is not flattened before measurement, the error will be large.

[0006] 3) Low level of automation: Most thickness gauges require manual operation and are difficult to integrate into smart production lines. Furthermore, most existing measurement methods lack real-time data feedback, making it impossible to dynamically adjust production processes.

[0007] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content

[0008] The purpose of this invention is to provide a leather thickness detection roller module to solve the problems of large measurement errors and inability to monitor in real time in traditional equipment.

[0009] To achieve the above objectives, the technical solution of this utility model is as follows: a leather thickness detection roller module, comprising a fixed frame, a roller assembly, and a displacement detector. The roller assembly includes an upper roller and a lower roller installed longitudinally from top to bottom on the fixed frame. The upper roller can be driven to move closer to or away from the lower roller, and the upper roller is elastically pressed against the lower roller during operation. The displacement detector is installed on the fixed frame and is used to monitor the relative displacement of the central axes of the upper roller and the lower roller.

[0010] Furthermore, the fixed gantry includes columns, a connecting beam, and mounting shafts. There are two columns arranged longitudinally. The connecting beam is installed between the two columns and located at the top of the columns. There are two mounting shafts, a lower shaft for installing the lower roller and an upper shaft for installing the upper roller. The lower shaft is fixedly installed transversely between the two columns, and the upper shaft is installed transversely between the two columns and located between the connecting beam and the lower shaft. The upper shaft can be manipulated to slide vertically with a single degree of freedom to drive the upper roller closer to or away from the lower roller.

[0011] Furthermore, the upper roller is coaxially mounted on the upper shaft, and the upper shaft and the upper roller are rotatably mounted relative to each other in the circumferential direction of the upper roller; the lower roller is coaxially mounted on the lower shaft, and the lower roller and the lower shaft are rotatably mounted relative to each other in the circumferential direction of the lower roller; the column is provided with a limiting groove extending longitudinally, and the two ends of the upper shaft are respectively inserted into the limiting grooves of the two columns in a drivable sliding manner along the limiting groove; the displacement detector is installed in the limiting groove of any column and connected to the upper shaft.

[0012] Furthermore, it also includes a drive assembly, which includes a drive source and a drive beam. The drive source is installed on the connecting beam, and the drive beam is disposed between the drive source and the upper shaft. The two ends of the drive beam are respectively connected to the two ends of the upper shaft. The drive source drives the upper shaft to slide with a single degree of freedom through the drive beam.

[0013] Furthermore, the drive assembly also includes a drive plate, with a connecting shaft at the top of the drive plate. Both ends of the drive beam extend longitudinally downward to form a hollow, bottom-opening limiting channel. Two drive plates are provided, and the connecting shafts of the two drive plates are respectively inserted into the limiting channels at both ends of the drive beam. The two drive plates are respectively sleeved on both ends of the upper shaft, and the drive beam is connected to the upper shaft through the drive plates.

[0014] Furthermore, the drive assembly also includes a limiting plate with limiting holes. A limiting plate is installed at the bottom opening of any limiting channel. A limiting boss is provided at the end of the connecting shaft. The connecting shaft passes through the limiting holes of the limiting plate. The diameter of the limiting holes is smaller than that of the limiting boss, so that the limiting boss is limited within the limiting channel.

[0015] Furthermore, it also includes an elastic element, which is sleeved on the connecting shaft, and the two ends of the elastic element along its own elastic force direction respectively abut against the limiting plate and the driving plate.

[0016] Furthermore, a limiting slide is provided longitudinally on the upper part of the column, and a limiting slider is provided at the end of the drive beam, with the limiting slider slidingly disposed within the limiting slide.

[0017] Furthermore, it also includes tension rollers. Along the radial direction of the lower roller, tension rollers are provided on both sides of the fixed gantry. The installation height of the tension rollers is not higher than the installation height of the lower roller.

[0018] The working principle of this technical solution is as follows: a displacement detector is used to measure the distance between the central axes of the upper and lower rollers when the leather is not clamped, as a basic value. Then, the upper and lower rollers are used to press the leather to be measured in a line contact manner. The relative displacement between the central axes of the upper and lower rollers (i.e., the distance between the central axes of the upper and lower rollers when the leather is clamped minus the basic value) is measured as the thickness of the leather to be measured. Since it is a surface contact and the leather is always clamped during the measurement process, the thickness of the leather can be dynamically monitored in real time, and the influence of manual operation and leather deformation on the final measurement results is avoided.

[0019] The beneficial effects of this technical solution are as follows:

[0020] Compared with existing technologies, the leather thickness detection roller module of this utility model, through the cooperation of a fixed gantry, roller group and displacement detector, indirectly and dynamically measures the thickness of leather by the displacement change of the central axis of the roller group, realizing accurate measurement of leather thickness. It solves the problems of large manual reading error, unstable pressure of the presser foot leading to measurement deviation and leather deformation affecting measurement accuracy of traditional thickness gauges. It also has the advantages of improving measurement accuracy, realizing automated detection and reducing leather deformation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the leather thickness detection roller module of this utility model;

[0022] Figure 2 This is a front view sectional view of the leather thickness detection roller module of this utility model;

[0023] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0024] Figure 4 for Figure 2 A magnified view of a portion of point B in the middle;

[0025] Figure 5 This is a schematic diagram of the drive board of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the column of this utility model;

[0027] Figure 7 This is a schematic diagram of the drive beam of this utility model;

[0028] Figure 8 This is a schematic diagram of the working state of the leather thickness detection roller module of this utility model. Detailed Implementation

[0029] The following detailed description illustrates the specific implementation method:

[0030] The reference numerals in the accompanying drawings include: upper roller 1, lower roller 2, column 3, connecting beam 4, drive beam 5, drive plate 6, drive source 7, upper shaft 8, lower shaft 9, displacement detector 10, limiting groove 11, limiting channel 12, limiting plate 13, elastic element 14, limiting slide 15, limiting slider 16, connecting shaft 17, limiting boss 18, tensioning roller 19, unwinder 20, and rewinder 21.

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The basic implementation examples are as follows: Figure 1 The diagram shows a leather thickness detection roller module, comprising a fixed gantry, a roller assembly, and a displacement detector 10. The roller assembly includes an upper roller 1 and a lower roller 2 mounted longitudinally from top to bottom on the fixed gantry. The upper roller 1 can be driven to move closer to or away from the lower roller 2, and during operation, the upper roller 1 is elastically pressed against the lower roller 2. The displacement detector 10 is mounted on the fixed gantry and is used to monitor the relative displacement of the central axes of the upper roller 1 and the lower roller 2. Specifically, the fixed gantry can be a welded metal frame or an adjustable assembly structure, wherein the column 3 is preferably a rectangular steel tube to ensure rigidity. Both the upper roller 1 and the lower roller 2 are cylindrical structures, using a polyurethane-coated steel core structure to balance wear resistance and elasticity. The displacement detector 10 can be an LVDT linear displacement sensor, a laser rangefinder, or a capacitive displacement meter, and its installation position is preferably in the middle of the column 3. The elastic clamping mechanism can be implemented using a compression spring, pneumatic cylinder, or servo motor in conjunction with a pressure sensor. Simultaneously, the roller surface can be machined with anti-slip textures or coated with a rubber layer to increase friction. Dynamic measurement of leather thickness is achieved through a dual-roller pressing structure. The elastic clamping force of the upper roller 1 prevents excessive compression that could lead to measurement distortion. The displacement detector 10 directly monitors the change in the distance between the two roller shafts. Compared to traditional point-contact thickness gauges, this method offers the following advantages: the measurement area is expanded from point contact to line contact, effectively averaging errors caused by uneven leather surfaces; the continuous rolling measurement method eliminates time difference errors from manual readings; and the overall modular design facilitates integration into automated production lines, enabling real-time acquisition and feedback of thickness data. It is particularly suitable for processing the thickness of newly produced leather, accurately reflecting overall thickness parameters, including the suede layer.

[0033] In this embodiment, the fixed gantry includes columns 3, connecting beams 4, and mounting shafts. Two columns 3 are arranged longitudinally. The connecting beams 4 are installed between the two columns 3 and located at the top of the columns 3. Two mounting shafts are provided: a lower shaft 9 for installing the lower roller 2 and an upper shaft 8 for installing the upper roller 1. The lower shaft 9 is fixedly installed laterally between the two columns 3, and the upper shaft 8 is installed laterally between the two columns 3 and located between the connecting beams 4 and the lower shaft 9. The upper shaft 8 can be manipulated to slide vertically with a single degree of freedom to drive the upper roller 1 closer to or away from the lower roller 2. Specifically, the columns 3 are made of metal and have sufficient rigidity and strength to support the operation of the entire module. The connecting beams 4 are fixed to the top of the columns 3 by bolts or welding to ensure structural stability. The lower shaft 9 is installed between the columns 3 via bearings or fixed seats to ensure stable rotation of the lower roller 2. The upper shaft 8 is connected to the columns 3 via sliding bearings or linear guides, allowing it to slide smoothly vertically. The sliding of the upper shaft 8 can be achieved through a drive device such as a cylinder, hydraulic cylinder, or electric push rod, enabling precise control of the position of the upper roller 1. The fixed gantry structure design allows for precise alignment and spacing adjustment of the upper roller 1 and lower roller 2. The two uprights 3 and connecting beam 4 form a stable frame structure, providing a reliable mounting foundation for the roller assembly. The two mounting shafts allow for independent installation and adjustment of the upper and lower rollers 2. In particular, the single-degree-of-freedom sliding design of the upper shaft 8 allows the upper roller 1 to automatically adjust the clamping force according to the leather thickness, ensuring measurement accuracy. This structural design effectively solves the measurement error problem caused by unstable pressure foot pressure in traditional thickness gauges, while improving the stability and reliability of the equipment.

[0034] In this embodiment, the upper roller 1 is coaxially mounted on the upper shaft 8, and the upper shaft 8 and the upper roller 1 are rotatably oriented relative to each other in the circumferential direction of the upper roller 1; the lower roller 2 is coaxially mounted on the lower shaft 9, and the lower roller 2 and the lower shaft 9 are rotatably oriented relative to each other in the circumferential direction of the lower roller 2; the column 3 is provided with a longitudinally extending limiting groove 11, and the two ends of the upper shaft 8 are respectively inserted into the limiting groove 11 of the two columns 3 in a drivable sliding manner along the limiting groove 11; the displacement detector 10 is installed in the limiting groove 11 of any column 3 and connected to the upper shaft 8. Specifically, the upper roller 1 and the upper shaft 8 are connected by bearings to achieve circumferential relative rotation, wherein the bearings can be deep groove ball bearings or needle roller bearings. The lower roller 2 and the lower shaft 9 are also rotatably connected by bearings. The cross-sectional shape of the limiting groove 11 is rectangular. The displacement detector 10 preferably employs an LVDT linear displacement sensor. The displacement detector 10 is embedded in the limiting groove 11 of the column 3, and its measuring rod is connected to the end of the upper shaft 8 via a universal joint. Simultaneously, a wear-resistant bushing can be added to the inner wall of the limiting groove 11 to extend its service life. The relatively rotatable roller structure avoids damage to the leather surface caused by friction during measurement. Furthermore, the integrated design of the limiting groove 11 and the displacement detector 10 accurately captures thickness changes. This structure separates the axial translational motion of the upper roller 1 from its own rotational motion, ensuring that the two movements do not interfere with each other and effectively avoiding errors during measurement. Compared with existing technologies, this structure solves the measurement error problem caused by uneven pressure of the pressure foot or leather deformation in traditional thickness gauges, achieving non-destructive measurement through mechanical structure optimization. The displacement detector 10 directly monitors the displacement of the upper shaft 8, eliminating transmission chain errors and making the measurement results more accurately reflect the true thickness. As a better implementation, displacement detectors 10 are installed in both columns 3. By measuring the displacement at both ends and calculating the average value, the measurement error can be further reduced and the measurement accuracy improved.

[0035] This embodiment also includes a drive assembly, which comprises a drive source 7 and a drive beam 5. The drive source 7 is mounted on the connecting beam 4, and the drive beam 5 is positioned between the drive source 7 and the upper shaft 8. Both ends of the drive beam 5 are connected to the two ends of the upper shaft 8, respectively. The drive source 7 drives the upper shaft 8 to slide with a single degree of freedom via the drive beam 5. The drive source 7 can be a linear drive device such as an electric push rod, a cylinder, or a hydraulic cylinder. Electric push rods offer advantages such as high control precision and fast response. The drive beam 5 is preferably made of high-strength aluminum alloy to reduce overall weight while maintaining sufficient structural rigidity. The drive assembly enables precise control of the position of the upper roller 1, solving the problem of large measurement errors in traditional thickness gauges. The drive source 7 transmits the driving force evenly to both ends of the upper shaft 8 via the drive beam 5, avoiding jamming that may occur with unilateral drive. Furthermore, this structural design facilitates integration into automated production lines, enabling continuous measurement and real-time data feedback of leather thickness. Compared with existing technologies, this solution offers advantages such as simple structure, high control precision, and good reliability.

[0036] In this embodiment, the drive assembly further includes a drive plate 6. A connecting shaft 17 is provided on the top of the drive plate 6. Both ends of the drive beam 5 extend longitudinally downwards to form hollow, bottom-opening limiting channels 12. Two drive plates 6 are provided, and the connecting shafts 17 of each drive plate 6 are respectively inserted into the limiting channels 12 at both ends of the drive beam 5. The two drive plates 6 are respectively sleeved on both ends of the upper shaft 8. The drive beam 5 is connected to the upper shaft 8 through the drive plates 6. The drive plate 6 serves as an intermediate component connecting the drive beam 5 and the upper shaft 8, and the connecting shaft 17 on its top is used to cooperate with the limiting channels 12 of the drive beam 5. The limiting channels 12 adopt a hollow, bottom-opening structure design, facilitating the insertion and limiting of the connecting shaft 17. The drive plate 6 is preferably made of stamped metal sheet, and the connecting shaft 17 can be fixed to the top of the drive plate 6 by welding or integral molding. The bottom of the drive plate 6 is provided with a sleeve hole matching the outer diameter of the upper shaft 8, and a sliding bearing can be installed in the sleeve hole to reduce friction. The connection between the drive plate 6 and the upper shaft 8 can be achieved using either a key connection or a flange connection to ensure reliable power transmission. By adding the drive plate 6, a flexible connection between the drive beam 5 and the upper shaft 8 is realized. The design of the fit between the limiting channel 12 and the connecting shaft 17 ensures the linearity of power transmission while allowing for minor assembly errors. The drive plate 6 makes the transmission of driving force smoother, avoiding stress concentration problems that may occur with rigid connections. Compared with existing technologies, this structure effectively solves the problem of off-center loading that may occur during the drive process, improving the smoothness of the movement of the upper roller 1 and the measurement accuracy. At the same time, the modular design facilitates independent repair and replacement of each component, reducing maintenance costs.

[0037] In this embodiment, the drive assembly further includes a limiting plate 13 and an elastic element 14. The limiting plate 13 is provided with a limiting hole, and a limiting plate 13 is installed at the bottom opening of any limiting channel 12. A limiting boss 18 is provided at the end of the connecting shaft 17, and the connecting shaft 17 passes through the limiting hole of the limiting plate 13. The diameter of the limiting hole is smaller than that of the limiting boss 18, so that the limiting boss 18 is limited within the limiting channel 12. The elastic element 14 is sleeved on the connecting shaft 17, and both ends of the elastic element 14 along its own elastic force direction respectively abut against the limiting plate 13 and the drive plate 6. In this embodiment, the limiting plate 13 achieves axial limitation of the drive plate 6 through the cooperation of the limiting hole and the connecting shaft 17, preventing the drive plate 6 from disengaging from the limiting channel 12 during movement. The diameter of the limiting boss 18 is larger than the diameter of the limiting hole, thereby forming a mechanical stop. The elastic element 14 is preferably a helical spring with adjustable preload. It buffers impacts during the driving process and maintains stable contact between the drive plate 6 and the limiting plate 13. Simultaneously, it ensures that the upper roller 1 is always pressed against the leather, but its movement is not affected by changes in leather thickness, thus avoiding impact on measurement results. As a preferred embodiment, the limiting plate 13 can be made of high-strength alloy steel, and a wear-resistant bushing can be installed on the inner wall of the limiting hole to extend its service life. The elastic element 14 can also be replaced with a rubber buffer pad or a gas spring, or other components with elastic recovery function. Through the synergistic effect of the limiting structure and the elastic element, the problem of loose connection that may occur in the drive assembly during high-speed reciprocating motion is effectively solved. Furthermore, when the leather thickness is uneven, the deformation of the elastic element 14 automatically compensates for the displacement change, avoiding measurement errors caused by rigid contact. The elastic coefficient of the elastic element 14 is precisely calculated, which can ensure sufficient clamping force to make the leather flat, and will not cause material compression deformation due to excessive pressure. This effectively solves the problem of unstable pressure of the pressure foot of the mechanical thickness gauge. At the same time, the elastic buffer also reduces the impact vibration during the operation of the equipment, which is conducive to extending the service life of the displacement detector 10.

[0038] In this embodiment, a limiting slide 15 is longitudinally arranged on the upper part of the column 3, and a limiting slider 16 is arranged at the end of the drive beam 5. The limiting slider 16 is slidably disposed within the limiting slide 15. The limiting slide 15 can be a linear guide, dovetail groove, or T-slot structure, and the limiting slider 16 can be a slider with ball bearings or a slider made of polytetrafluoroethylene (PTFE). Through the cooperation of the slide and the slider, the drive beam 5 is effectively guided and limited when driven on the column 3, resulting in smoother and more stable operation.

[0039] In this embodiment, tension rollers 19 are also provided. Tension rollers 19 are installed on both sides of the fixed gantry along the radial direction of the lower roller 2, and the installation height of the tension rollers 19 is no higher than the installation height of the lower roller 2. As shown in the figure, the main function of the tension rollers 19 is to ensure that the leather is in a taut state when passing through the upper and lower rollers 2. Therefore, when testing softer or larger leather, the flatness of the measured area can be maintained, solving the error problem caused by material deformation in traditional measurements. Compared with the method of simply relying on the upper and lower rollers 2 for pressure, this design significantly improves the reliability of the measurement results, and is especially suitable for leather materials with high elasticity.

[0040] The specific implementation process is as follows:

[0041] This embodiment takes simple thickness detection as an example to further illustrate the specific implementation steps.

[0042] When measuring the thickness of a roll of leather, the leather is first placed on the unwinding machine 20. Then, the leather is passed sequentially over the lower surface of the first tension roller, the upper surface of the lower roller 2, and the upper surface of the second tension roller, and then connected to the winding machine 21. Subsequently, the drive beam 5 is pressed down, so that the upper roller 1 is pressed against the surface of the leather, and the elastic element 14 is in a pre-tensioned state. Then, the winding machine 21 is started, and the leather is wound up at a set speed and passes through the upper and lower rollers 2. At this time, by monitoring the displacement of the upper roller 1 in real time, the thickness of the entire roll of leather can be obtained.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A leather thickness detection roller module, characterized in that: The system includes a fixed gantry, a roller assembly, and a displacement detector. The roller assembly includes an upper roller and a lower roller installed longitudinally from top to bottom on the fixed gantry. The upper roller can be driven to move closer to or away from the lower roller, and the upper roller is elastically pressed against the lower roller during operation. The displacement detector is installed on the fixed gantry and is used to monitor the relative displacement of the central axes of the upper roller and the lower roller.

2. The leather thickness detection roller module according to claim 1, characterized in that: The fixed gantry includes columns, a connecting beam, and mounting shafts. There are two columns arranged longitudinally. The connecting beam is installed between the two columns and located at the top of the columns. There are two mounting shafts, one for installing the lower roller and one for installing the upper roller. The lower shaft is fixedly installed transversely between the two columns. The upper shaft is installed transversely between the two columns and located between the connecting beam and the lower shaft. The upper shaft can be manipulated to slide vertically with a single degree of freedom to drive the upper roller closer to or away from the lower roller.

3. The leather thickness detection roller module according to claim 2, characterized in that: The upper roller is coaxially mounted on the upper shaft, and the upper shaft and the upper roller are rotatably arranged relative to each other in the circumferential direction of the upper roller; the lower roller is coaxially mounted on the lower shaft, and the lower roller and the lower shaft are rotatably arranged relative to each other in the circumferential direction of the lower roller; the column is provided with a limiting groove extending longitudinally, and the two ends of the upper shaft are respectively inserted into the limiting grooves of the two columns in a drivable sliding manner along the limiting groove; the displacement detector is installed in the limiting groove of any of the columns and connected to the upper shaft.

4. The leather thickness detection roller module according to claim 3, characterized in that: It also includes a drive assembly, which includes a drive source and a drive beam. The drive source is mounted on the connecting beam, and the drive beam is disposed between the drive source and the upper shaft. The two ends of the drive beam are respectively connected to the two ends of the upper shaft. The drive source drives the upper shaft to slide with a single degree of freedom through the drive beam.

5. The leather thickness detection roller module according to claim 4, characterized in that: The drive assembly also includes a drive plate, the top of which is provided with a connecting shaft. Both ends of the drive beam extend longitudinally downward to form a hollow, bottom-opening limiting channel. Two drive plates are provided, and the connecting shafts of the two drive plates are respectively inserted into the limiting channels at both ends of the drive beam. The two drive plates are respectively sleeved on both ends of the upper shaft, and the drive beam is connected to the upper shaft through the drive plates.

6. The leather thickness detection roller module according to claim 5, characterized in that: The drive assembly further includes a limiting plate with a limiting hole. A limiting plate is installed at the bottom opening of any of the limiting channels. A limiting boss is provided at the end of the connecting shaft. The connecting shaft passes through the limiting hole of the limiting plate. The diameter of the limiting hole is smaller than that of the limiting boss, so that the limiting boss is confined within the limiting channel.

7. The leather thickness detection roller module according to claim 6, characterized in that: It also includes an elastic element, which is sleeved on the connecting shaft, and the two ends of the elastic element along its own elastic force direction respectively abut against the limiting plate and the driving plate.

8. The leather thickness detection roller module according to claim 7, characterized in that: The upper part of the column is provided with a limiting slide along the longitudinal direction, and the end of the drive beam is provided with a limiting slider, which is slidably disposed within the limiting slide.

9. The leather thickness detection roller module according to claim 8, characterized in that: It also includes tension rollers. Along the radial direction of the lower roller, tension rollers are provided on both sides of the fixed gantry. The installation height of the tension rollers is not higher than the installation height of the lower roller.

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