Tension adjusting device and optical detection equipment

Abstract

The application discloses a tension adjusting device and an optical detection equipment, and belongs to the technical field of tension adjusting devices.

Description

Technical Field

[0001] This application relates to the technical field of testing equipment, and more particularly to a tension adjustment device and an optical testing device. Background Technology

[0002] In the material conveying process of optical inspection equipment, belt conveyors have become the mainstream conveying structure due to their wide application. To ensure stable conveying, the belt needs to maintain a specific tension, on the one hand to avoid slippage between the belt and the driving and driven pulleys, and on the other hand to ensure the belt's load-bearing capacity.

[0003] Although existing belt conveyor systems are equipped with belt tensioning mechanisms, they have obvious defects. Users find it difficult to judge the appropriate tension of the belt and cannot accurately control the adjustment scale, which easily leads to problems of looseness or excessive tightness. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a tension adjustment device and an optical detection device that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: On one hand, a tension adjustment device is provided for tensioning a conveyor belt. The tension adjustment device includes a detection mechanism and a tensioning mechanism, which are arranged at intervals. The detection mechanism includes a mounting base, a roller, a guide assembly, and a monitoring assembly. The conveyor belt is wound around the outer circumference of the roller, and the roller is mounted on the guide assembly. The monitoring assembly monitors the tension of the conveyor belt by the movement or compression of the roller. The conveyor belt is wound around the outer circumference of the roller in the detection mechanism. When the tension of the conveyor belt changes, the force it exerts on the roller changes accordingly: when the tension is too low, the pressure of the conveyor belt on the roller decreases, and the roller moves towards the slack direction along the guide assembly; when the tension is too high, the pressure of the conveyor belt on the roller increases, and the roller squeezes the monitoring assembly or moves towards the taut direction. The monitoring component can accurately determine the current tension of the conveyor belt by capturing the amount of movement or the pressure applied to the rollers, providing a basis for adjusting the tensioning mechanism. Intelligent adjustment of the conveyor belt tension is beneficial for timely monitoring of the conveyor belt tension, avoiding over-tensioning, which helps to extend the life of the conveyor belt, and avoiding under-tensioning, which helps to improve the transmission efficiency.

[0006] Furthermore, the monitoring component includes an identifier, an indicator, a limiting member, and an elastic member. The identifier is fixed to the mounting base, the indicator is mounted on the guide assembly, and the indicator moves along the guide assembly as the tension of the conveyor belt changes, pointing towards the identifier. The limiting member is located on the mounting base, and the two ends of the elastic member are respectively connected to the guide assembly and the limiting member. The cooperation between the indicator and the identifier enables visualization of tension, solving the problems of difficult judgment and inaccurate measurement during manual adjustment. The elastic member ensures stable indication, and the limiting member protects the structure. The overall design is low-cost, highly reliable, and suitable for manual adjustment scenarios.

[0007] Furthermore, the marking element is provided with at least one over-tight area to indicate that the conveyor belt is too tight, which can intuitively indicate the over-tight state of the conveyor belt and avoid damage caused by over-tightness.

[0008] Furthermore, the mounting base has a mounting groove, and the guide assembly includes a guide rail fixed to the mounting groove and a slider slidably mounted on the guide rail. The roller and the indicator are both mounted on the slider, the limiting member is fixed within the mounting groove, and the elastic member is located between the limiting member and the slider. The mounting groove and the guide rail slider cooperate to achieve precise guidance. The slider drives the roller and indicator to move synchronously, and the elastic member and the limiting member are stably stressed, ensuring accurate and intuitive tension monitoring and improving adjustment reliability.

[0009] Furthermore, the monitoring component includes a pressure sensor, and the guiding component includes a guide rail fixed to the mounting base and a slider slidably mounted on the guide rail. The pressure sensor is disposed between the slider and the limiting member. The pressure sensor can accurately detect the tension force transmitted by the slider, improving the accuracy of conveyor belt tension monitoring and ensuring the reliability of automatic adjustment.

[0010] Furthermore, the tensioning mechanism includes a base, a tensioning wheel, a mounting plate, and an adjusting component. The conveyor belt is wound around the outer circumference of the tensioning wheel. The mounting plate is movably mounted on the base, and the tensioning wheel is mounted on the side of the mounting plate opposite to the base. The adjusting component is pulsatorically connected to the mounting plate to drive the mounting plate to move relative to the base. The movable mounting plate on the base ensures stable movement of the tensioning wheel; the adjusting component drives the mounting plate to move, allowing precise adjustment of the tensioning wheel position, thereby effectively changing the tension of the conveyor belt, ensuring smooth operation of the conveyor belt, and improving adjustment reliability.

[0011] Furthermore, the tensioning mechanism also includes an indicating component, and the base is provided with an limit marking section; wherein, the limit marking section is a notch, a limiting hole, or a limiting block. The indicating component cooperates with the limit marking section such as the notch or limiting hole on the base to clearly indicate the tension limit when the mounting plate is at its limit position, preventing over-adjustment that could damage the conveyor belt or mechanism, and improving the safety and reliability of adjustment.

[0012] Furthermore, the indicating component includes a first detection element disposed on the base, which is triggered when the mounting plate moves to its limit position; and / or, the indicating component includes a pointing element disposed on the mounting plate, which points to the limit marking portion when the mounting plate moves to its limit position; and / or, the indicating component includes a second detection element disposed on the base, which is used to detect the position of the tensioning wheel or the distance between the mounting plate and the base. The indicating component can accurately indicate the tension limit of the conveyor belt and can also assist in monitoring real-time status, ensuring that adjustments do not exceed the limits, guaranteeing the safety of the conveyor belt and mechanism, and improving the reliability and convenience of adjustment.

[0013] Furthermore, the base is equipped with a guide rail, and the mounting plate is equipped with a guide slider that slides in conjunction with the guide rail. The precise cooperation between the guide rail and the guide slider ensures stable sliding of the mounting plate, controllable movement direction of the tension wheel, improves the accuracy and stability of the conveyor belt tension adjustment, and ensures reliable operation.

[0014] Furthermore, the base is provided with a guide groove, and the mounting plate is provided with a guide part that cooperates with the guide groove for guidance. Multiple screw holes are provided on both sides of the guide groove, and the mounting plate is provided with a strip-shaped hole through which fasteners pass and lock into the screw holes. When the mounting plate moves to its extreme position, the screw hole corresponding to the strip-shaped hole serves as a limiting hole. The cooperation between the guide groove and the guide part ensures stable movement of the mounting plate, while the strip-shaped hole and screw holes allow for flexible adjustment and fixation via fasteners. The screw hole corresponding to the extreme position, acting as a limiting hole, prevents over-adjustment and improves the reliability and convenience of tension adjustment.

[0015] Furthermore, a guide post is installed on the base, and a guide hole is formed on the mounting plate, which fits around the outer periphery of the guide post. The guide post and the guide hole cooperate to provide stable guidance for the mounting plate, restrict its movement direction to avoid deviation, and ensure that the mounting plate drives the tension wheel to move smoothly, thereby improving the accuracy and reliability of the conveyor belt tension adjustment.

[0016] Furthermore, the tensioning mechanism also includes a transmission shaft, through which the adjusting component is connected to the mounting plate; wherein, the adjusting component is an adjusting fastener; or, the adjusting component is a power assembly. The transmission shaft enables stable transmission between the adjusting component and the mounting plate, adapting to adjusting fasteners or power assemblies, ensuring precise and controllable tension adjustment, and improving adjustment reliability in different scenarios.

[0017] On the other hand, an optical inspection device is also provided, including a conveyor belt and a tension adjustment device as described above.

[0018] The beneficial effects of this application are as follows: By monitoring the tension of the conveyor belt in real time through a testing agency, the core problems of difficulty in judging the appropriate tension and inaccurate adjustment scale in the prior art are solved. Moreover, it can intuitively provide feedback on the tension status, avoid belt slippage or excessive wear caused by improper adjustment, and ensure the stability of the conveying process and the service life of the conveyor belt. At the same time, the structure is simple and can work with the tensioning mechanism to achieve precise adjustment, improving the reliability and ease of operation of the material conveying link of the optical testing equipment. Attached Figure Description

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is an assembly diagram of the tension adjustment device described in an embodiment of this application (manual configuration). Figure 2 This is a perspective view (manual solution) of the testing mechanism described in the embodiments of this application. Figure 3 This is a perspective view (manual solution) of the tensioning mechanism described in the embodiments of this application. Figure 4 Exploded view of the testing facility described in the embodiments of this application (manual view); Figure 5 This is an exploded view (manual view) of the tensioning mechanism described in the embodiments of this application. Figure 6 This is an assembly diagram of the tension adjustment device described in the embodiments of this application (automatic scheme); Figure 7 This is a perspective view of the testing mechanism (automatic scheme) described in the embodiments of this application. Figure 8 This is a perspective view (automatic scheme) of the tensioning mechanism described in the embodiments of this application; Figure 9 An exploded view of the testing mechanism (automatic scheme) described in the embodiments of this application; Figure 10 This is an exploded view (automatic scheme) of the tensioning mechanism described in the embodiments of this application.

[0021] In the diagram: 1. Detection mechanism; 2. Tensioning mechanism; 3. Conveyor belt; 101. Mounting base; 102. Roller; 103. Guide assembly; 104. Monitoring assembly; 105. Guide shaft; 201. Base; 202. Tensioner; 203. Mounting plate; 204. Power assembly; 205. Indicator assembly; 206. Limit marker; 207. Guide post; 208. Transmission shaft; 1011, Mounting slot; 1031, Guide rail; 1032, Slider; 1041, Identifier; 1042, Indicator; 1043, Limiting element; 1044, Elastic element; 1045, Pressure sensor; 2011, Guide groove; 2012, Screw hole; 2031, Guide section; 2032, Strip hole; 2033, Guide hole; 2051, First detection element; 2052, Pointing element; 2053, Light blocking plate. Detailed Implementation

[0022] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the material conveying system of optical inspection equipment, the material to be inspected needs to be accurately conveyed to the inspection area via a conveyor track. Among them, belt conveyor tracks occupy the vast majority of the market share in the industry due to their advantages such as stable conveying, wide applicability to various material types, and controllable costs. They are one of the core components that ensure the continuous operation of optical inspection equipment.

[0026] The stable operation of belt conveyors is highly dependent on the belt tension. From a functional perspective, the belt tension must meet two core requirements simultaneously. First, it must generate sufficient friction with the drive and driven pulleys in the conveying system to prevent slippage due to belt slack and ensure that the material conveying speed and position accuracy meet the detection requirements. Second, it must provide a basic load-bearing capacity for the belt to prevent excessive deformation, deviation, or even failure to convey materials due to insufficient tension under load.

[0027] Although belt tensioning mechanisms are now widely used in traditional belt conveyor systems, there are still technical challenges that need to be addressed during actual operation and maintenance. These challenges can be summarized in two aspects: On the one hand, when adjusting the tensioning mechanism, users lack objective standards for reference. They cannot accurately know the required belt tension to simultaneously meet the dual requirements of anti-slippage and load-bearing capacity, nor can they determine whether it is approaching the over-tightness threshold. Existing operating methods rely heavily on user experience, which is highly subjective and prone to errors, easily leading to improper adjustments and affecting the stability of the conveyor system.

[0028] On the other hand, belt tension adjustment has physical limits and cannot be tightened indefinitely. With prolonged use, damage caused by aging, wear, and fatigue leads to a continuous decrease in the maximum tension. If the tensioning mechanism is used to compensate for this slack, it can easily exceed the belt's load-bearing limit, causing breakage and resulting in equipment downtime and material damage. However, current technologies either lack indicators for the belt's critical breakage state, preventing users from anticipating the risk, or require specialized and complex testing instruments such as tension gauges and strain gauges for detection. This not only increases maintenance costs but also necessitates professional operation, failing to meet the needs for rapid on-site assessment and timely replacement.

[0029] Therefore, this embodiment provides a tension adjustment device, such as... Figures 1-5As shown, the device tensions the conveyor belt 3 by manual adjustment. The tension adjustment device includes a detection mechanism 1 and a tensioning mechanism 2, which are arranged at intervals. The detection mechanism 1 includes a mounting base 101, a roller 102, a guide assembly 103, and a monitoring assembly 104. The conveyor belt 3 is wound around the outer periphery of the roller 102. The roller 102 is mounted on the guide assembly 103. The roller 102 moves along the guide assembly 103 as the tension of the conveyor belt 3 changes. The monitoring assembly 104 monitors the tension of the conveyor belt 3 through the movement of the roller 102.

[0030] In this design, the conveyor belt 3 is wound around the outer periphery of the roller 102 of the detection mechanism 1. The roller 102 is mounted on the guide assembly 103. The guide assembly 103 restricts the roller 102 to move only in the direction related to the change in the tension of the conveyor belt 3, ensuring that the displacement of the roller 102 is determined only by the tension of the conveyor belt 3. When the tension of the conveyor belt 3 is insufficient, its constraint force on the roller 102 weakens, and the roller 102 moves away from the conveyor belt 3 along the guide assembly 103 under its own weight or a preset auxiliary force. When the tension of the conveyor belt 3 is too large, the tension or compression force of the conveyor belt 3 on the roller 102 increases, pushing the roller 102 to move closer to the conveyor belt 3 along the guide assembly 103. The monitoring component 104 captures the movement trajectory of the roller 102, transforming the abstract tension force into an intuitive positional change. Users can accurately determine whether the current tension is appropriate by observing the indication of the monitoring component 104, and then manually operate the tensioning mechanism 2 to adjust the tension of the conveyor belt 3 until the monitoring component 104 indicates that the tension is within the optimal range.

[0031] This device, through a mechanical linkage structure involving the movement of roller 102 and indication by monitoring component 104, effectively solves the core problems of existing technologies, such as the difficulty for users to judge the appropriate tension and the inaccuracy of adjustment. Specifically, it converts the change in the tension of the conveyor belt 3 into a visual position signal, replacing the traditional subjective judgment based on experience and feel. This allows users to intuitively and accurately grasp the adjustment direction and scale, fundamentally avoiding the problem of the conveyor belt 3 being too loose or too tight due to improper adjustment. At the same time, the manual adjustment mode is suitable for scenarios with low automation requirements. It has a simple structure, low cost, is not easily affected by environmental interference, and is easy to maintain. For optical inspection equipment, stable conveyor belt 3 tension ensures consistent material conveying trajectory and stable speed, providing a reliable material posture basis for optical inspection, indirectly improving detection accuracy, and overall improving the reliability and ease of operation of the equipment conveying process.

[0032] It should be noted that the detection mechanism 1 and the tensioning mechanism 2 are arranged at intervals. They can be arranged at intervals on both sides along the length of the conveyor belt 3, or they can be set on the same side. When they are on the same side, the tensioning mechanism 2 can be set above or below the detection mechanism 1.

[0033] Furthermore, the monitoring component 104 includes an identifier 1041, an indicator 1042, a limiting member 1043, and an elastic member 1044. The identifier 1041 is fixed to the mounting base 101. The indicator 1042 is mounted on the guide component 103 and moves along the guide component 103 as the tension of the conveyor belt 3 changes. The indicator 1042 points towards the identifier 1041. The limiting member 1043 is located on the mounting base 101. The two ends of the elastic member 1044 are respectively connected to the guide component 103 and the limiting member 1043. The identifier 1041 is fixed to the mounting base 101 and serves as a reference for tension, such as a graduated ruler, and its position remains unchanged. The indicator 1042 is mounted on the guide component 103 and moves synchronously with the roller 102 and the guide component 103, always pointing towards the identifier 1041. The elastic element 1044 is connected to the guide component 103 and the limiting element 1043 at both ends, respectively, and applies a preset elastic force to the guide component 103 in its natural state; the limiting element 1043 is fixed to the mounting base 101 and is used to limit the maximum travel of the guide component 103.

[0034] When the tension of the conveyor belt 3 increases, the squeezing force of the conveyor belt 3 on the roller 102 increases, pushing the roller 102 to move the guide assembly 103 towards the compression elastic element 1044. The elastic element 1044 generates a reverse elastic force due to deformation, forming a dynamic balance with the tension of the conveyor belt 3. At this time, the indicator 1042 moves with the guide assembly 103, and its position pointing to the marker 1041 shifts towards the tension scale. When the tension of the conveyor belt 3 decreases, the force of the conveyor belt 3 on the roller 102 weakens, and the elastic force of the elastic element 1044 pushes the guide assembly 103 to reset, causing the indicator 1042 to shift towards the slack scale until the elastic force and tension force are rebalanced. By observing the pointing position of the indicator 1042 on the marker 1041, the current tension of the conveyor belt 3 can be directly determined. At the same time, the limiting member 1043 can prevent the guide assembly 103 from moving excessively, avoiding damage to the elastic element 1044 due to over-travel deformation, and ensuring structural stability.

[0035] Crucially, the elastic element 1044 can apply a compressive force to the conveyor belt 3, allowing it to loosen slowly and preventing excessive looseness from causing it to collide with or damage the equipment.

[0036] Furthermore, the indicator 1041 is provided with at least one over-tight area indicating that the conveyor belt 3 is too tight. The indicator 1041, through clear area division, includes at least an over-tight area, which can be expanded into three areas: over-tight, moderate, and loose. This further transforms the change in tension of the conveyor belt 3 into a precise visual signal. The specific process is as follows: The indicator 1041 is fixed to the mounting base 101. The side of it closest to the roller 102 is set as the over-tight area (e.g., marked with red or marked with an over-tight scale), and the side away from the roller 102 can be set as the loose area (e.g., marked with yellow). The area in between is the moderate area (e.g., marked with green). The indicator 1042 moves synchronously with the guide assembly 103 and the roller 102. When the tension of the conveyor belt 3 is too high, the roller 102 is squeezed by the conveyor belt 3 and moves towards the over-tight area of ​​the indicator 1041, causing the indicator 1042 to enter the red over-tight area. When the tension is within a reasonable range, the elastic element 1044 balances the tension, and the indicator 1042 remains stable in the green moderate area. When the tension is insufficient, the elastic element 1044 pushes the guide assembly 103 to reset, and the indicator 1042 moves away from the over-tight area with the roller 102, entering the yellow relaxed area. By observing the color or scale area of ​​the indicator 1042, the user can directly judge the current state of the conveyor belt 3: red means it is too tight and the tensioning mechanism 2 needs to be loosened; green means it is moderate and no adjustment is needed; yellow means it is relaxed and the tensioning mechanism 2 needs to be tightened, thus achieving precise control over the direction and scale of adjustment.

[0037] In the manually adjustable scheme, the tensioning mechanism 2 includes a base 201, a tensioning wheel 202, a mounting plate 203, an adjusting component, and a transmission shaft 208. The transmission belt 3 is wound around the outer periphery of the tensioning wheel 202. The mounting plate 203 is movably mounted on the base 201. The tensioning wheel 202 is mounted on the side of the mounting plate 203 away from the base 201. The adjusting component is connected to the mounting plate 203 via the transmission shaft 208 to drive the mounting plate 203 to move relative to the base 201. The adjusting component is an adjusting fastener.

[0038] The base 201 provides a fixed support foundation for the entire tensioning mechanism 2. The mounting plate 203 is movably mounted on the base 201 and can move relative to the base 201 in a preset direction. The tensioning wheel 202 is mounted on the side of the mounting plate 203 away from the base 201. The conveyor belt 3 is wrapped around the outer periphery of the tensioning wheel 202. The displacement of the mounting plate 203 directly drives the tensioning wheel 202 to move synchronously, thereby changing the tension of the conveyor belt 3. The adjusting fastener is connected to the mounting plate 203 via a transmission shaft 208. When the user operates the adjusting component forward, the adjusting component pushes the transmission shaft 208 through threaded engagement. The transmission shaft 208 transmits force to the mounting plate 203, driving the mounting plate 203 to move along the base 201 towards the conveyor belt 3. The tensioning wheel 202 then compresses the conveyor belt 3, increasing the tension. When the adjusting component is operated in reverse, the transmission shaft 208 pulls or releases the mounting plate 203, causing the mounting plate 203 to move along the base 201 away from the conveyor belt 3. The pressure exerted by the tensioning wheel 202 on the conveyor belt 3 decreases, reducing the tension. The movable connection between the mounting plate 203 and the base 201 restricts the movement trajectory of the tensioning wheel 202, ensuring that the adjusting force is precisely applied to the conveyor belt 3. Simultaneously, with the position feedback from the indicator 1042 and the marker 1041 in the detection mechanism 1, the user can repeatedly fine-tune the adjusting component until the indicator 1042 is in the appropriate range, thus achieving precise tension adjustment. The adjusting fastener can be a bolt with a handwheel, a wing screw, etc., and the transmission shaft 208 can be a lead screw, a drive shaft, etc., that is threaded to the adjusting component.

[0039] Meanwhile, a guide shaft 105 protrudes from the limiting member 1043 toward the slider 1032, and the elastic member 1044 is sleeved on the outer periphery of the guide shaft 105. The radial constraint of the guide shaft 105 on the elastic member 1044 completely avoids irregular deformation such as lateral bending and twisting caused by uneven force during compression or elongation of the elastic member 1044, ensuring that the elastic force is always transmitted axially along the guide rail 1031, without any lateral force interfering with the movement of the slider 1032. This characteristic makes the balance between the tension of the conveyor belt 3 and the elastic force of the elastic member 1044 more stable, and the displacement of the slider 1032 corresponds strictly linearly with the tension of the conveyor belt 3, significantly improving the accuracy of the indicator 1042 pointing to the marker 1041, and further reducing the judgment error of tension adjustment.

[0040] Furthermore, the irregular deformation of the elastic element 1044 can lead to localized stress concentration, accelerating material fatigue and wear. The guide shaft 105, by limiting radial deformation, ensures that the elastic element 1044 is subjected to uniform stress, with deformation occurring only in the axial direction. This effectively reduces localized wear and fatigue damage, significantly extending the service life of the elastic element 1044. Simultaneously, the guide shaft 105 prevents the elastic element 1044 from colliding and rubbing against the inner wall of the mounting groove 1011 under vibration, further reducing component wear, decreasing maintenance and replacement frequency, and meeting the requirements of long-term continuous operation of optical inspection equipment.

[0041] As an optional specific implementation plan, such as Figures 6-10 As shown, the tension adjustment device adopts an automatic adjustment method. Specifically, the monitoring component 104 includes a limiting member 1043 and a pressure sensor 1045. The pressure sensor 1045 is disposed between the limiting member 1043 and the guide component 103, and no elastic member 1044, marking member 1041, or indicator member 1042 is provided. In this scheme, the roller 102 cannot move along the guide component 103. Instead, the pressure value is obtained by the guide component 103 pressing the pressure sensor 1045, thereby determining the tension of the conveyor belt 3.

[0042] Specifically, in the monitoring component 104, a pressure sensor 1045 (such as a strain gauge or piezoelectric sensor) is positioned between the limiting member 1043 and the guide component 103. The roller 102 is mounted on the guide component 103 and is limited in position, unable to move, and can only transmit force through its own or the slight deformation of the guide component 103. When the tension of the conveyor belt 3 changes, its wrapping or squeezing force on the roller 102 directly acts on the guide component 103: when the tension increases, the squeezing force of the conveyor belt 3 on the roller 102 increases, and the guide component 103 is pushed and squeezed by this force, increasing the pressure value detected by the sensor; when the tension decreases, the force of the conveyor belt 3 on the roller 102 weakens, the squeezing force of the guide component 103 on the pressure sensor 1045 decreases, and the pressure value detected by the sensor decreases. The pressure sensor 1045 converts the detected pressure signal into an electrical signal and transmits it to the control system in real time. The control system presets the pressure threshold range corresponding to the optimal tension of the conveyor belt 3. When the received pressure value is lower than the threshold, it drives the tensioning mechanism 2 to tighten the belt; when the pressure value is higher than the threshold, it drives the tensioning mechanism 2 to loosen the belt until the pressure value stabilizes within the threshold range, forming a fully automatic closed-loop control of detection, feedback and adjustment.

[0043] In the automatic adjustment scheme, the adjusting component in the tensioning mechanism 2 is the power assembly 204, which is electrically connected to the pressure sensor 1045. Other components include the base 201, tensioning wheel 202, mounting plate 203, and transmission shaft 208. The power end of the power assembly 204 is connected to the transmission shaft 208. The pressure sensor 1045 is positioned between the limiting member 1043 and the guide assembly 103, directly detecting the compressive force converted from the tension of the conveyor belt 3. In the tensioning mechanism 2, the power assembly 204 (such as a servo motor or pneumatic cylinder) serves as the adjusting component. Its control end is electrically connected to the pressure sensor 1045, and its power end is connected via the transmission shaft 208 to the mounting plate 203, which is movably mounted on the base 201. The tensioning wheel 202 is mounted on the mounting plate 203 and wound around the conveyor belt 3.

[0044] When the tension of the conveyor belt 3 changes, the pressure sensor 1045 converts the detected pressure value into an electrical signal in real time and transmits it directly to the built-in control module of the power assembly 204. The control module presets a pressure threshold range corresponding to the optimal tension of the conveyor belt 3: if the received pressure value is lower than the threshold, the control module immediately instructs the power assembly 204 to move forward, and the power end pushes the mounting plate 203 along the base 201 towards the conveyor belt 3 through the transmission shaft 208, and the tensioning wheel 202 squeezes the conveyor belt 3 to increase the tension; if the pressure value is higher than the threshold, the control module instructs the power assembly 204 to move in the opposite direction, and the transmission shaft 208 pulls the mounting plate 203 away from the conveyor belt 3, and the squeezing force of the tensioning wheel 202 on the conveyor belt 3 decreases; when the pressure value stabilizes within the threshold range, the power assembly 204 stops operating and maintains the current tension state. The guiding cooperation between the mounting plate 203 and the base 201 ensures that the tensioning wheel 202 only moves along the preset trajectory to avoid deviation.

[0045] Optionally, the mounting base 101 has a mounting groove 1011, and the guide assembly 103 includes a guide rail 1031 fixed to the mounting groove 1011 and a slider 1032 slidably mounted on the guide rail 1031. A roller 102 is mounted on the slider 1032, and a limiting member 1043 is fixed in the mounting groove 1011. In the manual adjustment scheme, an elastic member 1044 is disposed between the limiting member 1043 and the slider 1032, and an indicator member 1042 is disposed on the slider 1032. In the automatic adjustment scheme, a pressure sensor 1045 is disposed between the limiting member 1043 and the slider 1032.

[0046] In the manual adjustment scheme, roller 102 is mounted on slider 1032. The two ends of elastic element 1044 are connected to limiting element 1043 and slider 1032 respectively within mounting groove 1011. Indicator 1042 is fixed to slider 1032 and points to marker 1041 on mounting base 101. When the tension of conveyor belt 3 increases, its squeezing force on roller 102 pushes slider 1032 to slide along guide rail 1031 towards limiting element 1043, compressing elastic element 1044. The deformation of elastic element 1044 generates a reverse elastic force that balances the tension force. Slider 1032 drives indicator 1042 to move synchronously, pointing to the over-tightened area of ​​marker 1041. When the tension decreases, the elastic force of the elastic element 1044 pushes the slider 1032 to slide in the opposite direction along the guide rail 1031, and the indicator 1042 shifts towards the slack area; when the tension is moderate, the slider 1032 is stable in the middle of the guide rail 1031, and the indicator 1042 points to the moderate area. The user can achieve precise adjustment by manually adjusting the tensioning mechanism 2 by observing the position of the indicator 1042.

[0047] In the automatic adjustment scheme, roller 102 is mounted on slider 1032, and pressure sensor 1045 is located between limit member 1043 and slider 1032 within mounting groove 1011. There is no elastic member 1044 or indicator 1042. Because guide rail 1031 restricts slider 1032 to slide only along a directional path, and the supporting effect of pressure sensor 1045 prevents slider 1032 from moving freely, when the tension of conveyor belt 3 changes, its force on roller 102 is directly transmitted to slider 1032, pushing slider 1032 to press pressure sensor 1045. When tension increases, the pressing force increases; when tension decreases, the pressing force decreases. Pressure sensor 1045 converts the detected pressure signal into an electrical signal and transmits it to power component 204, driving mounting plate 203 and tensioning roller 202 to move, thus realizing automatic tension adjustment.

[0048] In some embodiments, the tensioning mechanism 2 further includes an indicating component 205. An extreme marking portion 206 is provided on the base 201. When the mounting plate 203 moves to its extreme position, the indicating component 205 indicates that the conveyor belt 3 is at its tension limit value, or the indicating component 205 cooperates with the extreme marking portion 206 to indicate that the conveyor belt 3 is at its tension limit value. The extreme marking portion 206 can be a notch, a limiting hole, or a limiting block. The form and installation position of the indicating component 205 are not limited and can be flexibly selected according to the spatial layout and design complexity of the tensioning mechanism 2. For example, a miniature sensor sheet can be selected for compact spaces, a pointer + notch can be selected for intuitive operation, and a color-coded strip can be selected for low-cost scenarios. This solves the problem that fixed structures are difficult to adapt to different optical detection equipment and improves the versatility of the solution.

[0049] Moreover, whether it is a direct indication or a combined indication, it can clearly warn when the tension reaches the limit, which not only prevents the conveyor belt 3 from being overstretched and broken due to the deviation of the feel during manual adjustment, but also provides mechanical limit protection for automatic adjustment, avoiding equipment damage caused by the failure of a single electronic component, and is especially suitable for the high protection requirements of optical inspection equipment for core components.

[0050] Specifically, the indicating component 205 includes a first detection element 2051, which is disposed on the base 201. When the mounting plate 203 moves to its limit position, the first detection element 2051 is triggered; and / or, the indicating component 205 includes a pointing element 2052, which is disposed on the mounting plate 203. When the mounting plate 203 moves to its limit position, the pointing element 2052 points to the limit marking part 206; and / or, the indicating component 205 includes a second detection element, which is disposed on the base 201. The second detection element can be a distance sensor or a position sensor. The second detection element is used to detect the position of the tensioning wheel 202 or the distance between the mounting plate and the base.

[0051] In one implementation, the indicator component can be implemented as follows: The first approach involves an indicating component 205 including a first detection element 2051. The first detection element 2051 (such as a proximity switch or photoelectric sensor) is fixed to the limit position of the base 201. When the mounting plate 203 moves to the tension limit, it triggers the first detection element 2051 (e.g., the mounting plate 203 blocks the sensor's optical path, triggering a sensing signal). The first detection element 2051 outputs an electrical signal, indicating that the conveyor belt 3 has reached its tension limit. The first detection element 2051 achieves automatic detection and signal output of the tension limit, eliminating the need for manual observation, adapting to automated production lines, providing rapid response, and avoiding equipment damage caused by human error.

[0052] The second approach involves an indicator component 205 including a pointer 2052 (such as a pointer) mounted on a mounting plate 203. The base 201 has a limit marking section 206 (such as a notch or scale). When the mounting plate 203 moves to the tension limit, the pointer 2052 precisely points to the limit marking section 206, providing a visual indication that the conveyor belt 3 has reached its tension limit through mechanical pointing, eliminating the need for manual observation. This purely mechanical structure has no electronic components, resulting in low cost and low failure rate. It is suitable for simple, manually adjustable equipment, has a low operating threshold, and allows users to directly judge the limit state visually.

[0053] The third approach involves an indicator component 205 that includes a second detection element (such as a grating displacement sensor, Hall effect position sensor, or laser rangefinder sensor). This second detection element is fixed to the base 201, and its detection range covers the movement trajectory of the tensioning wheel 202, allowing for real-time acquisition of the tensioning wheel 202's position coordinates. The tensioning wheel 202 is mounted on a movable mounting plate 203 and moves synchronously with it. When the tension of the conveyor belt 3 increases, the mounting plate 203 drives the tensioning wheel 202 towards its near-breakage limit position; the greater the tension, the closer the tensioning wheel 202 is to this limit. The second detection element has a preset limit position threshold; when the tensioning wheel 202 reaches this position, the tension of the conveyor belt 3 has reached the breakage threshold, and it will break if no further adjustment is made. During operation, the second detection unit continuously compares the real-time detected position signal of the tension wheel 202 with a preset threshold: when the real-time position is less than the threshold, the tension is considered safe and no signal is output; when the real-time position is equal to or exceeds the threshold, the second detection unit immediately outputs a warning signal, indicating that the conveyor belt 3 is in a critical state of breakage and requires emergency adjustment.

[0054] The fourth approach involves an indicator component 205 comprising a first detection element 2051 and a pointing element 2052. The first detection element 2051 (e.g., a proximity switch or photoelectric sensor) is fixed to the limit marking section 206 of the base 201. The pointing element 2052 (e.g., a metal sensing sheet or a light-blocking sheet 2053) is mounted on the mounting plate 203 and moves synchronously with it. When the mounting plate 203 moves to its tension limit position, the pointing element 2052 enters the detection range of the first detection element 2051 (e.g., a metal sheet triggers a proximity switch, or the light-blocking sheet 2053 blocks a photoelectric sensor). The first detection element 2051 immediately outputs an electrical signal, warning that the conveyor belt 3 has reached its breakage threshold. This approach balances rapid response in automated scenarios with intuitive judgment during manual inspections, providing double protection and preventing missed detections due to a single component failure.

[0055] The fifth approach involves an indicator component 205 comprising a first detection element 2051 and a second detection element. The first detection element 2051 triggers an alarm at its limit position, while the second detection element monitors the position of the tension wheel 202 in real time and outputs dynamic data. At the limit, the two elements work in tandem: the first detection element 2051 quickly outputs a stop signal, and the second detection element simultaneously records the limit position data. Outside the limit, the second detection element provides feedback on the tension trend. This approach ensures both emergency response to limit conditions and provides dynamic monitoring data throughout the entire stroke, facilitating the analysis of tension change patterns, supporting predictive maintenance, and adapting to intelligent production lines.

[0056] The sixth option is that the indicator component 205 includes a pointing component 2052 and a second detection component. When the mounting plate 203 is at its limit, the pointing component 2052 is aligned with the limit marking part 206, and the second detection component detects the limit position and outputs a signal simultaneously. When it is not at its limit, the second detection component provides real-time feedback on the position of the tension wheel, and the pointing component assists the operator in judging the current tension. If it is close to the limit marking part 206, the tension is too high.

[0057] Furthermore, the moving structure of the tension wheel 202 includes the following configurations: First, a guide rail is provided on the base 201, and a guide slider 1032 that slides in cooperation with the guide rail is provided on the mounting plate 203. The guide rail is fixed parallel to the base 201, and the guide slider 1032 is correspondingly installed on the bottom of the mounting plate 203, forming a precise sliding fit between the slider 1032 and the guide rail. When adjusting the tension, the mounting plate 203 moves reciprocally along the guide rail via the slider 1032. The rigid constraint of the guide rail restricts the mounting plate 203 to only translate along the rail direction, preventing vertical displacement or rotation, and ensuring that the moving direction of the tension wheel 202 is consistent with the tension adjustment direction of the conveyor belt 3.

[0058] Alternatively, the base 201 has a guide groove 2011, and the mounting plate 203 has a guide part 2031 that cooperates with the guide groove 2011 for guidance. Multiple screw holes 2012 are provided on both sides of the guide groove 2011, and the mounting plate 203 has a strip-shaped hole 2032. Fasteners pass through the strip-shaped hole 2032 and lock into the screw hole 2012. When the mounting plate 203 moves to its limit position, the screw hole 2012 corresponding to the strip-shaped hole 2032 serves as the limiting hole. The base 201 has an elongated guide groove 2011, and the bottom of the mounting plate 203 has a guide part 2031, such as a protrusion, that matches the guide groove 2011. The guide part 2031 is embedded in the guide groove 2011 to form a sliding constraint. Multiple screw holes 2012 are spaced apart along the length of both sides of the guide groove 2011, and the mounting plate 203 has corresponding strip-shaped holes 2032. During adjustment, loosen the fasteners connecting the strip hole 2032 and the screw hole 2012. The mounting plate 203 can slide along the guide groove 2011 via the guide part 2031. After adjustment, lock the fasteners to fix the position. When the mounting plate 203 moves to the tension limit position, the screw hole 2012 aligned with the end of the strip hole 2032 becomes the limiting hole. The fasteners can be temporarily locked in the screw hole 2012, restricting the mounting plate 203 from moving further, thus forming a mechanical limit.

[0059] Alternatively, guide posts 207 are mounted on the base 201, and guide holes 2033 are formed on the mounting plate 203 around the guide posts 207. One or two guide posts 207, such as optical axes, are fixed on the base 201, and guide holes 2033 are formed at corresponding positions on the mounting plate 203, with the hole walls fitting with the outer circumference of the guide posts 207. When adjusting the tension, the mounting plate 203 slides axially along the guide posts 207 through the guide holes 2033. The cylindrical surface constraint of the guide posts 207 ensures that the mounting plate 203 can only move axially, avoiding lateral displacement. The tensioning wheel 202 moves stably closer to or further away from the conveyor belt 3 along with the mounting plate 203.

[0060] On the other hand, an optical inspection device is also provided, including a conveyor belt 3 and a tension adjustment device as described above. The tension adjustment device includes a detection mechanism and a tensioning mechanism. The tensioning mechanism is used to adjust the tension of the conveyor belt, and the detection mechanism is used to detect the tension of the conveyor belt. The conveyor belt is wound around the outer circumference of the rollers of the detection mechanism. When the tension of the conveyor belt changes, the force it exerts on the rollers changes accordingly: when the tension is too low, the pressure of the conveyor belt on the rollers decreases, and the rollers move in the slack direction along the guide assembly; when the tension is too high, the pressure of the conveyor belt on the rollers increases, and the rollers squeeze the monitoring component or move in the taut direction. The monitoring component can accurately determine the current tension of the conveyor belt by capturing the amount of movement or the pressure exerted on the rollers, providing a basis for the adjustment of the tensioning mechanism. Intelligent adjustment of the conveyor belt tension is beneficial for timely monitoring of the conveyor belt tension, avoiding over-tension, which helps to extend the life of the conveyor belt; and avoiding under-tension, which helps to efficiently transport the test piece and improve transmission efficiency.

[0061] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0062] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0064] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A tension adjustment device for tensioning a conveyor belt (3), characterized in that, The tension adjustment device includes a detection mechanism (1) and a tensioning mechanism (2), wherein the detection mechanism (1) and the tensioning mechanism (2) are arranged at intervals; The detection mechanism (1) includes a mounting base (101), a roller (102), a guide assembly (103), and a monitoring assembly (104). The conveyor belt (3) is wrapped around the outer periphery of the roller (102), the roller (102) is mounted on the guide assembly (103), and the monitoring assembly (104) monitors the tension of the conveyor belt (3) by the movement or compression of the roller (102).

2. The tension adjustment device according to claim 1, characterized in that, The monitoring component (104) includes an identifier (1041), an indicator (1042), a limiting component (1043), and an elastic component (1044). The identifier (1041) is fixed to the mounting base (101). The indicator (1042) is mounted on the guide component (103) and moves along the guide component (103) as the tension of the conveyor belt (3) changes. The indicator (1042) points to the identifier (1041). The limiting component (1043) is located on the mounting base (101). The two ends of the elastic component (1044) are respectively connected to the guide component (103) and the limiting component (1043).

3. The tension adjustment device according to claim 2, characterized in that, The marking element (1041) has at least one over-tight area indicating that the conveyor belt (3) is too tight.

4. The tension adjustment device according to claim 2, characterized in that, The mounting base (101) has a mounting groove (1011). The guide assembly (103) includes a guide rail (1031) fixed to the mounting groove (1011) and a slider (1032) slidably mounted on the guide rail (1031). The roller (102) and the indicator (1042) are both mounted on the slider (1032). The limiting member (1043) is fixed in the mounting groove (1011). The elastic member (1044) is located between the limiting member (1043) and the slider (1032).

5. The tension adjustment device according to claim 1, characterized in that, The monitoring component (104) includes a limiting member (1043) and a pressure sensor (1045). The limiting member (1043) is mounted on the mounting base (101). The guide component (103) includes a guide rail (1031) fixed to the mounting base (101) and a slider (1032) slidably mounted on the guide rail (1031). The pressure sensor (1045) is disposed between the slider (1032) and the limiting member (1043).

6. The tension adjusting device according to any one of claims 1-5, characterized in that, The tensioning mechanism (2) includes a base (201), a tensioning wheel (202), a mounting plate (203), and an adjusting member. The conveyor belt (3) is wound around the outer periphery of the tensioning wheel (202). The mounting plate (203) is movably mounted on the base (201). The tensioning wheel (202) is mounted on the side of the mounting plate (203) away from the base (201). The adjusting member is connected to the mounting plate (203) in a transmission connection to drive the mounting plate (203) to move relative to the base (201).

7. The tension adjustment device according to claim 6, characterized in that, The tensioning mechanism (2) also includes an indicator component (205), and the base (201) is provided with a limit marking part (206). The limit marking part (206) is a notch, a limiting hole, or a limiting block.

8. The tension adjustment device according to claim 7, characterized in that, The indicating component (205) includes a first detection element (2051), which is disposed on the base (201). When the mounting plate (203) moves to the limit position, the first detection element (2051) is triggered. And / or, the indicating component includes a pointing element (2052) disposed on the mounting plate (203), and when the mounting plate (203) is moved to the limit position, the pointing element (2052) points to the limit marking portion (206). And / or, the indicating component (205) includes a second detection element disposed on the base (201), the second detection element being used to detect the position of the tensioning wheel (202).

9. The tension adjustment device according to claim 8, characterized in that, The base (201) is provided with a guide rail, and the mounting plate (203) is provided with a guide slider that slides in cooperation with the guide rail.

10. The tension adjustment device according to claim 8, characterized in that, The base (201) is provided with a guide groove (2011), and the mounting plate (203) is provided with a guide part (2031) that cooperates with the guide groove (2011) for guidance. Multiple screw holes (2012) are provided on both sides of the guide groove (2011), and the mounting plate (203) is provided with a strip hole (2032). Fasteners pass through the strip hole (2032) and lock into the screw hole (2012). When the mounting plate (203) moves to the limit position, the screw hole (2012) corresponding to the strip hole (2032) becomes the limiting hole.

11. The tension adjustment device according to claim 8, characterized in that, The base (201) is equipped with a guide post (207), and the mounting plate (203) is provided with a guide hole (2033) that is sleeved on the outer periphery of the guide post (207).

12. The tension adjustment device according to claim 7, characterized in that, The tensioning mechanism (2) further includes a transmission shaft (208), and the adjusting member is connected to the mounting plate (203) via the transmission shaft (208); The adjusting component is an adjusting fastener; Alternatively, the adjusting element is a power assembly (204).

13. An optical inspection device, characterized in that, It includes a conveyor belt and a tension adjustment device as described in any one of claims 1-12.

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