Control device for the tension of a carrier tape and material conveying apparatus

Abstract

The embodiment of the application provides a carrier tape tension control device and a material conveying device, and relates to the technical field of carrier tape tension control. The carrier tape tension control device comprises a support seat, a rotating part, a reel, a detection part and a controller. The rotating part is rotationally connected to the support seat and is used for abutting against the carrier tape. The connection part of the rotating part and the support seat forms a turning fulcrum. In the plumb direction, the turning fulcrum and the center of gravity of the rotating part are mutually dislocated. The reel is used for winding and unwinding or winding and tightening the carrier tape. The detection part is arranged at the turning fulcrum and is used for detecting the rotation angle of the rotating part. The controller is electrically connected with the detection part. The controller controls the reel to wind and unwind or wind and tighten the carrier tape according to the rotation angle of the rotating part, so as to control the tension of the carrier tape. The control device can simplify the structure of the carrier tape tension control device, reduce the mechanical stress of the carrier tape, and realize closed-loop control of the carrier tape tension, so as to improve the dynamic response.

Description

Technical Field

[0001] This application relates to the field of tape tension control technology, and in particular to a control device for carrier tape tension and a material conveying equipment. Background Technology

[0002] Semiconductor carrier tape is a core component in semiconductor packaging and automated handling of electronic components. It is widely used in post-die packaging of semiconductor wafers, storage and transportation of electronic components (such as IC chips, sensors, and capacitors), and automated placement systems. In automated production processes, the carrier tape needs to be driven by a reel motor at high speed and high precision, and enters the placement equipment after passing through a tension control system. At this point, the stability of the carrier tape tension directly affects the accuracy of component picking, the integrity of the pocket structure, and the sealing performance of the cover tape.

[0003] In related technologies, the carrier belt tension control system employs a spring-loaded swing arm, a load sensor, a torque-controlled reel motor, and an optical displacement sensing system. Specifically, the spring-loaded swing arm requires a Z-shaped winding path to amplify the tension effect and improve sensitivity; the high-precision load sensor is mounted on the roller or swing arm to directly measure the tension; the torque-controlled reel motor indirectly controls the tension by adjusting the motor's output torque; and the optical displacement sensing system combines the spring-loaded swing arm with an optical sensor to monitor the swing arm's displacement.

[0004] However, the aforementioned carrier belt tension control device has a complex structure, high mechanical stress on the carrier belt, and the carrier belt tension control system cannot achieve closed-loop control, resulting in insufficient dynamic response. Summary of the Invention

[0005] This application provides a carrier belt tension control device and a material conveying equipment to simplify the structure of the carrier belt tension control system, reduce the mechanical stress of the carrier belt, and improve dynamic response.

[0006] On one hand, embodiments of this application provide a device for controlling the tension of a carrier belt, comprising:

[0007] Support base.

[0008] The rotating component is rotatably connected to the support base and is used to abut against the carrier belt. The connection between the rotating component and the support base forms a fulcrum of rotation. In the vertical direction, the fulcrum of rotation and the center of gravity of the rotating component are offset from each other.

[0009] A reel is used to wind and unwind or wind and tighten carrier tape.

[0010] The detection element is set at the pivot point and is used to detect the rotation angle of the rotating component.

[0011] The controller is electrically connected to the detection element. The controller controls the reel to unwind or tighten the carrier tape according to the rotation angle of the rotating element, so as to control the tension of the carrier tape.

[0012] In the aforementioned control device for the carrier belt tension, it is possible to achieve a mass of m for the rotating component and a distance L between the pivot point and the center of gravity of the rotating component. g The distance between the contact point between the rotating component and the carrier belt and the pivot point is L. t The tension of the carrier belt is T, and the deflection angle of the center of gravity of the rotating component relative to the pivot point in the vertical direction is θ; T is related to m and L. g L t The following conditions must be met between θ and θ:

[0013] T = (m × g × L) g / L t )×sinθ, where g is the acceleration due to gravity.

[0014] In the aforementioned carrier belt tension control device, it is possible to achieve a rotation angle of α for the rotating component, and the rotating component has a first preset angle and a second preset angle, the first preset angle being α1 and the second preset angle being α2; the carrier belt has a slack state, a balanced state, and an over-tight state.

[0015] When α is less than α1, the carrier belt is in a relaxed state; when α is greater than or equal to α1 and less than or equal to α2, the carrier belt is in a balanced state; when α is greater than α2, the carrier belt is in an overly tight state.

[0016] In the aforementioned carrier belt tension control device, it is possible to further include a drive component, which is electrically connected to the controller, and the drive component is used to drive the reel to unwind or tighten the carrier belt.

[0017] When α is less than α1, the controller controls the drive to increase the drive speed, and the reel winds and tightens the carrier belt to increase the tension of the carrier belt so that the carrier belt is in a balanced state.

[0018] When α is greater than α2, the controller controls the drive to reduce the drive speed, and the reel unwinds the carrier tape to reduce the tension of the carrier tape so that the carrier tape is in a balanced state.

[0019] In the aforementioned control device for the tension of the carrier belt, it is possible to have a support base comprising a support portion and a connecting portion, one end of which is fixedly connected to the support portion, and the other end of which is rotatably connected to the rotating component, with the rotatable connection between the connecting portion and the rotating component forming a pivot point.

[0020] In the aforementioned control device for the tension of the carrier belt, it is possible to include a first limiting member and a second limiting member on opposite sides of the rotating member along the rotation direction to limit the rotation angle of the rotating member.

[0021] The lines connecting the first and second limiting members to the pivot point have an angle, which is less than or equal to the maximum rotation angle of the rotating member.

[0022] In the aforementioned carrier belt tension control device, it is possible to have a rotating component with a contact surface for contacting the carrier belt, and rollers provided on the contact surface.

[0023] In the aforementioned control device for the tension of the carrier belt, it is possible to have multiple torque adjustment positions provided on the rotating component, and the rotating component also includes a torque adjustment component, one of which can be detachably installed on one of the multiple torque adjustment positions.

[0024] In the aforementioned control device for carrier belt tension, it is possible to use at least one of the following as the detection element: absolute encoder, incremental encoder, Hall sensor, optocoupler sensor, and magnetoresistive angle sensor.

[0025] In the aforementioned control device for the tension of the carrier belt, it is possible to install a damper at the pivot point.

[0026] On the other hand, this application provides a material conveying device, including: a carrier belt and the above-mentioned carrier belt tension control device, wherein the carrier belt tension control device is disposed on one side of the carrier belt, and the rotating part of the carrier belt tension control device abuts against the carrier belt.

[0027] The carrier belt tension control device and material conveying equipment provided in this application embodiment, in which the control device, by misaligning the pivot point of the connection between the support base and the rotating component with the center of gravity of the rotating component in the vertical direction, allows the rotating component to generate torque solely by gravity, while the tension of the carrier belt generates torque in the opposite direction, thereby converting the change in carrier belt tension into a change in the rotation angle of the rotating component; simultaneously, a detection element is set at the pivot point to detect the rotation angle of the rotating component, and a controller is set to control the reel to unwind or tighten the carrier belt according to the rotation angle of the rotating component, forming a real-time detection and closed-loop control of the carrier belt tension, thereby reducing additional mechanical stress during the carrier belt conveying process and improving the accuracy, dynamic response, and stability of tension control.

[0028] Furthermore, by rotatably connecting the rotating component to the support base and having the rotating component abut against the carrier belt to form a single contact point, the carrier belt can move along an approximately straight path, which helps to simplify the structure of the control device and further reduce the mechanical stress on the carrier belt. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] Figure 1 This is a schematic diagram of the structure of the carrier belt tension control device provided in the embodiments of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Support base; 11. Support part; 12. Connecting part; 20. Rotating component; 21. Rotation fulcrum; 22. Abutment surface; 30. Reel; 40. Detection component; 50. Carrier belt.

[0033] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] Semiconductor carrier tape is a core component in semiconductor packaging and automated handling of electronic components. It is widely used in post-die packaging of semiconductor wafers, storage and transportation of electronic components (such as IC chips, sensors, and capacitors), and automated placement systems. In automated production processes, the carrier tape needs to be driven by a reel motor at high speed and high precision, and enters the placement equipment after passing through a tension control system. At this point, the stability of the carrier tape tension directly affects the accuracy of component picking, the integrity of the pocket structure, and the sealing performance of the cover tape.

[0036] In related technologies, carrier belt tension control systems employ a spring-loaded swing arm, a load sensor, a torque-controlled reel motor, and an optical displacement sensing system. The spring-loaded swing arm requires a Z-shaped winding path to amplify the tension and improve sensitivity; however, the repeated bending of the carrier belt leads to high mechanical stress. A high-precision load sensor is mounted on the roller or swing arm to directly measure the tension; the torque-controlled reel motor indirectly controls the tension by adjusting the motor's output torque; the optical displacement sensing system combines the spring-loaded swing arm with an optical sensor to monitor the swing arm's displacement. However, the aforementioned carrier belt tension control systems cannot achieve closed-loop control, resulting in insufficient dynamic response.

[0037] The carrier belt tension control device and material conveying equipment provided in this application, by misaligning the pivot point at the connection between the support base and the rotating component with the center of gravity of the rotating component in the vertical direction, allow the rotating component to generate torque solely by gravity, while the carrier belt tension generates torque in the opposite direction. This transforms the change in carrier belt tension into a change in the rotation angle of the rotating component. Simultaneously, a detection element is installed at the pivot point to detect the rotation angle of the rotating component, and a controller is installed to control the reel to unwind or tighten the carrier belt according to the rotation angle of the rotating component. This forms a real-time detection and closed-loop control of the carrier belt tension, thereby reducing additional mechanical stress during carrier belt conveying and improving the accuracy, dynamic response, and stability of tension control.

[0038] Furthermore, by rotatably connecting the rotating component to the support base and having the rotating component abut against the carrier belt to form a single contact point, the carrier belt can move along an approximately straight path, which helps to simplify the structure of the control device and further reduce the mechanical stress on the carrier belt.

[0039] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0040] On the one hand, refer to Figure 1 As shown in the figure, this application provides a control device for the tension of a carrier belt, including: a support base 10, a rotating component 20, a reel 30, a detection component 40, and a controller.

[0041] The support base 10 serves to bear and support the rotating component 20, the detection component 40, and related structures that cooperate with them. It provides an installation foundation and load-bearing support for each component. Simultaneously, through its rotational connection with the rotating component 20, it forms a stable rotation fulcrum 21, ensuring that the rotating component 20 can swing in a controlled manner around a preset axis. For example, the support base 10 can be positioned to the side or below the conveyor path of the carrier belt 50, allowing the rotating component 20 to abut against the carrier belt 50 without interfering with its normal conveying. It can also serve as an assembly reference for the reel 30, the drive component, and the controller. During operation, the support base 10 remains fixed, serving only as a bearing and positioning platform. Assembly with other components can be achieved through bolted connections, welded connections, riveted connections, or modular snap-fit ​​connections.

[0042] The rotating component 20 is rotatably connected to the support base 10. The rotating component 20 is used to abut against the carrier belt 50. When the tension of the carrier belt changes, the change in tension is converted into a detectable rotation angle signal by angle deflection, thereby providing mechanical input for subsequent closed-loop control.

[0043] The connection between the rotating component 20 and the support base 10 forms a pivot point 21. In the plumb direction, the pivot point 21 and the center of gravity of the rotating component 20 are misaligned so that the rotating component 20 generates a restoring torque under the action of gravity, thereby establishing a torque balance relationship between the change of the carrier belt tension and its own weight.

[0044] For example, the rotating component 20 can be a single-arm swing arm, a plate-shaped swing arm, or a frame-type swing arm, and is mounted at the rotation fulcrum 21 of the support base 10 by means of a pivot, pin, or bearing.

[0045] The reel 30 is used to wind and unwind or wind and tighten the carrier belt 50. The tension is adjusted by changing the effective length of the carrier belt 50, so that the carrier belt 50 is always kept within the preset tension range during the conveying process.

[0046] For example, the reel 30 can be a cylindrical reel 30, a flange reel 30, or a split reel, and its material can be aluminum alloy, steel, or composite material. Furthermore, the outer periphery of the reel 30 can be provided with an anti-slip layer, a limiting edge, or a guide groove to improve winding stability and prevent the carrier belt 50 from deviating. In addition, the reel 30 can be positioned upstream or downstream of the carrier belt 50 conveying path and coaxially arranged with the carrier belt 50 reel, or connected to a drive unit via a transmission mechanism, so as to perform forward winding tightening, reverse winding unwinding, or intermittent fine-tuning under the action of controller commands.

[0047] The detection element 40 is set at the rotation fulcrum 21. The detection element 40 is used to detect the rotation angle of the rotating element 20 and output a corresponding electrical signal to the controller, so that the tension state of the carrier belt can be converted into a quantifiable feedback quantity. The detection element 40, the support base 10, and the rotating element 20 form a mounting interface at the rotation fulcrum 21, and are arranged coaxially with the shaft end and the end face of the rotating shaft to reduce the influence of assembly deviation on the measurement results.

[0048] The controller is electrically connected to the detection element 40 to receive rotation angle signals and control the reel 30 to unwind or tighten the carrier tape 50 according to the rotation angle of the rotating element 20, thereby controlling the tension of the carrier tape 50 in a closed-loop manner. For example, the controller can be a PLC controller, an embedded control board, or an industrial computing unit, internally including a main control chip, a power module, a signal acquisition module, and a drive interface. The housing can be a metal shielding box or a plastic casing to meet anti-interference and installation protection requirements.

[0049] When the carrier belt 50 begins to convey, it is released from the reel 30 and enters the conveying path. The rotating component 20 is in a swingable state relative to the pivot point 21 of the support 10. The carrier belt 50 abuts against the rotating component 20, causing the center of gravity of the rotating component 20 to be offset relative to the pivot point 21 in the vertical direction. In the initial stage of conveying, the tension of the carrier belt 50 is within a preset range, and the carrier belt 50 is in a balanced state. As the carrier belt 50 runs along the conveying path, the change in the tension of the carrier belt will act on the contact surface of the rotating component 20, causing the rotating component 20 to produce a corresponding change in rotation angle around the pivot point 21. This change in angle directly reflects the current tension state of the carrier belt 50. The detection element 40, located at the pivot point 21, detects the angular displacement of the rotating element 20 in real time and transmits the corresponding signal to the controller. The controller judges the detection result according to the preset tension control logic. When the deflection of the rotating element 20 is detected, indicating that the carrier belt tension is too small or too large, the controller drives the reel 30 to perform winding tightening or winding unwinding actions, and changes the effective length of the carrier belt 50 to bring the tension back to the target range. When the detection result tends to be stable, the controller keeps the reel 30 in the corresponding state, thereby avoiding fluctuations caused by frequent adjustments.

[0050] In the control device of this application embodiment, by forming a single contact point between the carrier belt 50 and the rotating member 20, the structure of the control device is simplified without relying on complex multi-stage winding paths, reducing bending stress on the semiconductor element pockets and reducing particle generation. Through continuous detection and real-time closed-loop control of the carrier belt tension, additional mechanical stress is reduced during the transport of the carrier belt 50, improving the accuracy, dynamic response, and stability of tension control. Furthermore, the center-of-gravity misalignment of the rotating member 20 provides a gravity-based restoring torque, giving the control device a clear zero-point reference when unloaded or lightly loaded. Combined with the angle output of the detection member 40, this improves the consistency and stability of tension change recognition, thereby helping to reduce transport deviations, slippage, and uneven winding caused by slack, excessive tightness, or short-term fluctuations in the carrier belt 50, and enhancing the continuity and reliability of the carrier belt 50 transport process.

[0051] In one feasible implementation, the mass of the rotating component 20 is m, and the distance between the pivot point 21 and the center of gravity of the rotating component 20 is L. g The distance between the contact point between the rotating component 20 and the carrier belt 50 and the pivot point 21 is L. t The tension of the carrier belt 50 is T, and the deflection angle of the center of gravity of the rotating component 20 relative to the pivot point 21 in the vertical direction is θ; T is related to m and L. g L t The following conditions must be met between θ and θ:

[0052] T = (m × g × L) g / L t)×sinθ, where g is the acceleration due to gravity.

[0053] During the conveying process of the carrier belt 50, when the rotating component 20 is in a state of force equilibrium, the torque generated by the tension of the carrier belt is equal to the torque generated by the gravity of the rotating component 20. Torque can be understood as the physical quantity that causes an object to rotate around a fixed fulcrum due to a force. The magnitude of the torque is equal to the product of the force and the perpendicular distance (lever arm) from the line of action of that force to the fulcrum. Therefore, the gravitational torque of the rotating component 20 can be expressed as m × g × L. g ×sinθ, where L g ×sinθ represents the lever arm of gravity; the torque of the belt tension can be expressed as T×L. t , where L t The lever arm representing the tension force.

[0054] According to the principle of torque balance, we can obtain: m × g × L g ×sinθ=T×L t Furthermore, by transforming the formula, the formula for calculating the tension of the carrier belt can be derived: T = (m × g × L) g / L t Therefore, the detection component 40 can calculate the actual tension of the current carrier belt 50 by detecting the rotation angle α of the rotating component 20 in real time and combining it with the inherent parameters of each structure in the control device, thereby realizing real-time monitoring of the tension.

[0055] As one feasible implementation, the rotation angle of the rotating member 20 is α, and the rotating member 20 has a first preset angle and a second preset angle, the first preset angle being α1 and the second preset angle being α2; the carrier belt 50 has a slack state, a balanced state, and an over-tight state.

[0056] When α is less than α1, the carrier belt 50 is in a relaxed state; when α is greater than or equal to α1 and less than or equal to α2, the carrier belt 50 is in a balanced state; when α is greater than α2, the carrier belt 50 is in an over-tight state.

[0057] The slack state of the carrier belt 50 refers to the state where the carrier belt tension is lower than the target control range, the carrier belt 50 has a margin in the conveying path and may produce slight sagging or gaps; the balanced state refers to the state where the carrier belt tension is within the preset control range and can meet the requirements of stable conveying; the over-tight state refers to the state where the carrier belt tension exceeds the target control range, which may lead to increased transmission resistance or abnormal force on the carrier belt 50.

[0058] The first preset angle α1 and the second preset angle α2 are used as angle thresholds for determining the tension state of the carrier belt 50. The first preset angle α1 is used to characterize the boundary where the carrier belt 50 transitions from a balanced state to a relaxed state, and the second preset angle α2 is used to characterize the boundary where the carrier belt 50 transitions from a balanced state to an over-tight state. By having the controller compare the rotation angle α output by the detection element 40 with the preset angle range, the current tension state of the carrier belt 50 can be directly determined.

[0059] The first preset angle α1 and the second preset angle α2 of the rotating component 20 can be determined in combination with the material, thickness, width and conveying speed of the carrier belt 50 to form a control window suitable for the current working conditions. This window is generally set to a small angle range to improve the system's sensitivity to changes in tension and avoid frequent shaking.

[0060] For example, the first preset angle α1 can be -15 ° to -5 ° Within the range, the second preset angle α2 can be +5 ° Up to +15 ° Within a certain range, for example, α1 can be -15. ° -12 ° -10 ° -8 ° -5 ° α1 can be 5 ° 8 ° 10 ° 12 ° 15 ° Any of the above-mentioned angles are acceptable, and this embodiment does not impose specific limitations on them. By forming a short-stroke rotating structure within the above-mentioned angle range, minimal buffering is provided, while achieving rapid dynamic response. Furthermore, within this limited angle range, the angular displacement of the rotating component 20 and the tension of the carrier belt have an approximately linear relationship, thereby simplifying the control algorithm and achieving rapid closed-loop stable control. It should be noted that 0° is considered as the angle when the rotating component 20 is in the equilibrium position. ° As a reference, the first preset angle α1 is the angle at which the rotating part 20 rotates from the equilibrium position toward the slack side of the carrier belt 50, and the second preset angle α2 is the angle at which the rotating part 20 rotates from the equilibrium position toward the tension side of the carrier belt 50. The positive and negative angles only represent the direction of deflection, and the numerical values ​​represent the magnitude of the angle of deviation from the equilibrium position.

[0061] It is understandable that when the carrier belt 50 is in equilibrium or initial state, in the plumb direction, the center of gravity of the pivot point 21 and the rotating component 20 are misaligned, so that the deflection angle of the center of gravity of the rotating component 20 relative to the pivot point 21 in the plumb direction can be θ0. When the rotating component 20 deflects under the action of the carrier belt 50, there is a certain relationship between the deflection angle θ of the center of gravity of the rotating component 20 relative to the pivot point 21 in the plumb direction and the rotation angle α of the rotating component 20. For example, when the center of gravity of the rotating component 20 in the initial state is located near the tension side of the pivot point 21 in the plumb direction, and when the rotating component 20 rotates towards the slack side of the carrier belt 50, α = θ0 + θ; when the rotating component 20 rotates towards the tension side of the carrier belt 50, α = θ - θ0. Therefore, based on the rotation angle of the rotating component and the torque balance relationship m × g × L, g ×sinα=T×L t To derive and calculate the tension of the carrier belt 50.

[0062] As one possible implementation, it also includes a drive unit electrically connected to the controller, the drive unit being used to drive the reel 30 to wind and unwind or wind and tighten the carrier tape 50.

[0063] The drive unit can be understood as a power actuation component. It is electrically connected to the controller and is used to drive the reel 30 to wind and unwind or wind and tighten the carrier belt 50. It can change the rotation speed, direction of rotation, or output torque of the reel 30 according to the adjustment commands output by the controller, thereby dynamically compensating for the tension of the carrier belt 50 as the angle of the rotating component 20 changes. In addition, the rated power, rated torque, maximum speed, and output shaft size of the drive unit can be determined based on the diameter of the reel 30, the frictional resistance of the carrier belt 50, the width of the carrier belt 50, and the tension adjustment range.

[0064] For example, the drive unit can be disposed in the transmission link of the reel 30, and can be directly coaxially connected to the reel 30's shaft, or connected to the reel 30 through a reducer, coupling, synchronous pulley, or gear transmission mechanism, so as to smoothly transmit the motor output to the reel 30. The output shaft of the drive unit and the reel 30 can be connected by a standard coupling, key connection, or flange connection to ensure reliable torque transmission and facilitate assembly and maintenance.

[0065] For example, the drive unit can be any of a servo motor, a stepper motor, or a brushless DC motor. Servo motors are suitable for high-precision closed-loop speed regulation, stepper motors are suitable for step-by-step positioning control, and brushless DC motors are suitable for continuous adjustment over a wide speed range.

[0066] When α is less than α1, the controller controls the drive to increase the drive speed, and the reel 30 winds and tightens the carrier belt 50 to increase the tension of the carrier belt 50 so that the carrier belt 50 is in a balanced state.

[0067] Understandably, when the detection element 40 detects that the rotation angle α of the rotating element 20 is less than the first preset angle α1, it indicates that the carrier belt 50 is in a slack state. The controller then controls the drive element to increase the drive speed, so that the reel 30 tightens the carrier belt 50 at a higher winding speed, thereby increasing the carrier belt tension and returning the carrier belt 50 to a balanced state.

[0068] When α is greater than α2, the controller controls the drive to reduce the drive speed, and the reel 30 winds up and unwinds the carrier belt 50 to reduce the tension of the carrier belt 50 so that the carrier belt 50 is in a balanced state.

[0069] It is understandable that when the detection component 40 detects that the rotation angle α of the rotating component 20 is greater than the first preset angle α2, it indicates that the carrier belt 50 is in an overly tight state. The controller then controls the drive component to reduce the drive speed, so that the reel 30 can release part of the tension by decelerating the winding or slightly unwinding the carrier belt 50 in the reverse direction, and return the carrier belt 50 to a balanced state.

[0070] By adjusting the speed according to the angle threshold, the winding and unwinding actions of the reel 30 on the carrier belt 50 can be adapted to the changes in tension, thereby forming a closed-loop control of the carrier belt tension, which reduces manual intervention and improves the stability and response speed of tension control.

[0071] As one feasible implementation, the support base 10 includes a support portion 11 and a connecting portion 12. One end of the connecting portion 12 is fixedly connected to the support portion 11, and the other end of the connecting portion 12 is rotatably connected to the rotating member 20. The rotatable connection between the connecting portion 12 and the rotating member 20 forms a rotation fulcrum 21.

[0072] The support portion 11 provides the foundation and load-bearing conditions for the entire support base 10, and is used to stably install the belt tension control device on the frame, base, or other fixed platform, and to bear the load and reaction force transmitted by the rotating member 20. The connecting portion 12 is a structural component that extends outward from the support portion 11 and is used to form a rotational engagement with the rotating member 20, thereby providing the rotating member 20 with a limited degree of freedom of swing, so that the rotating member 20 can change angle around the pivot point 21 under the action of the belt 50.

[0073] For example, the support part 11 can be fixed to the equipment frame by means of screws, welding, riveting or positioning pins, and the connecting part 12 extends outward from one side of the support part 11 to form a cantilever, support arm or frame extension structure. Its end is rotatably connected to the rotating part 20 through bearings, bushings, pins or shafts to ensure low friction and stable rotational accuracy at the pivot point 21. In addition, the support part 11 and the connecting part 12 can also be implemented in different forms such as an integrally molded bracket, a split assembly bracket, an adjustable angle bracket or a modular mounting base.

[0074] As one feasible implementation, the support base 10 further includes a first limiting member and a second limiting member, which are disposed on opposite sides of the rotating member 20 along the rotation direction to limit the rotation angle of the rotating member 20.

[0075] The lines connecting the first and second limiting members and the pivot point 21 form an angle, which is less than or equal to the maximum rotation angle of the rotating member 20.

[0076] The first and second limiting components are mechanical limiting parts installed on the support base 10. They are used to block the movement of the rotating component 20 when it reaches the preset rotation angle, limit the maximum rotation angle of the rotating component 20, and prevent the rotating component 20 from swinging excessively under the influence of belt tension fluctuations, instantaneous impacts, or external disturbances. This ensures that the rotating component 20 is always within the detectable and controllable effective angle range, and provides stable boundary conditions for the controller to adjust the tension according to the angle threshold.

[0077] For example, the first limiting member and the second limiting member are respectively arranged in the end regions of the rotating member 20 along the forward rotation path and the reverse rotation path. The two are arranged symmetrically or approximately symmetrically with respect to the pivot point 21 and form a preset angle with the line connecting them to the pivot point 21. The angle is less than or equal to the maximum rotation angle of the rotating member 20, so that the rotating member 20 completes the angle detection first within the normal working swing angle range, and is then blocked by the limiting member when it approaches the limit position.

[0078] For example, the first limiting member and the second limiting member can be respectively a protruding stop, an adjustable screw limiter, or a buffer pad limiter. The protruding stop can be installed on the surface of the support base 10 by fasteners, the adjustable screw limiter can adjust the limiting position by threads, and the buffer pad limiter can be provided with an elastic energy-absorbing layer at the contact end.

[0079] In some embodiments, the contact ends of the first and second limiting members may also be provided with a wear-resistant layer, an elastic buffer layer, or a sound-absorbing layer to reduce the impact and noise when the rotating member 20 touches the limiting member.

[0080] As one possible implementation, the rotating member 20 has an abutment surface 22 for abutting against the carrier belt 50, and a roller is provided on the abutment surface 22.

[0081] The contact surface 22 is a contact surface formed on the side of the rotating member 20 facing the carrier belt 50, which is used to bear the force of the carrier belt 50. The roller is a rolling contact member that can be passively rotated with the relative movement of the carrier belt 50, which is used to change the relative contact between the carrier belt 50 and the rotating member 20 from sliding friction to rolling friction.

[0082] By providing a rolling element on the contact surface 22, the carrier belt 50 can be smoothly guided by the rollers when passing the rotating element 20 and a load corresponding to the tension force can be applied to the rotating element 20. This reduces the wear on the surface of the carrier belt 50, avoids tension fluctuations caused by excessive frictional resistance, and improves the response sensitivity of the rotating element 20 to changes in the tension state of the carrier belt 50.

[0083] For example, the contact surface 22 can be an arc surface, a flat surface, or a curved envelope surface, and the roller can be a metal roller, an engineering plastic roller, or a rubber-coated roller, and can be used with needle roller bearings, deep groove ball bearings, or sliding bushings to achieve reliable rotation.

[0084] In some embodiments, a wear-resistant rubber layer, a polyurethane layer, or a low-friction coating may also be provided at the contact surface 22 of the rotating member 20 to further improve contact stability and reduce indentations on the surface of the carrier belt 50. The radius of curvature of the contact surface 22 can be set according to the width of the carrier belt 50 and the spacing of its pocket structures to ensure that the carrier belt 50 has sufficient support area when passing through, without deformation or damage due to local stress concentration.

[0085] As one feasible implementation, the rotating member 20 is provided with multiple torque adjustment positions, and the rotating member 20 also includes a torque adjustment member, which is detachably installed on one of the multiple torque adjustment positions.

[0086] The torque adjustment position is a reserved structure set on the rotating component 20 for installing, positioning or replacing the torque adjustment component. The installation position of the torque adjustment component on the rotating component 20 can be changed according to assembly requirements, providing configurable mass distribution conditions for the rotating component 20. This allows the rotating component 20 to have different equivalent torque characteristics under different carrier belt tension conditions, thereby adjusting the response sensitivity, rotational balance and detection angle range of the rotating component 20 to changes in carrier belt tension.

[0087] For example, the torque adjustment position can be set at different positions along the radial or circumferential direction of the rotating member 20, and can be set near the pivot point 21, away from the pivot point 21, or in an intermediate position between the two, depending on the structural form of the rotating member 20, so as to adjust the additional torque introduced by the torque adjustment member by changing the lever arm. The torque adjustment position can be a threaded hole, a slot, a plug hole, or a magnetic mounting position; the torque adjustment member can be a counterweight, an adjustable screw, or a modular mass block, and the material of the torque adjustment member can be a steel block, a tungsten alloy block, a copper block, or a high-density alloy block to provide sufficient mass compensation in a small volume.

[0088] Furthermore, the spacing and distribution angle of multiple torque adjustment positions are typically determined based on the length, radius, and allowable adjustment range of the rotating component 20, enabling a graded adjustment effect for torque changes corresponding to different installation positions. The mass of the torque adjustment component can be configured according to the tension level, and its individual mass can be set within a certain proportional range to the total mass of the rotating component 20. For example, a smaller mass adjustment component is used under low tension conditions, and a larger mass adjustment component is used under high tension conditions, so that the distance between the fulcrum 21 and the center of gravity and the corresponding torque arm meet the control accuracy requirements.

[0089] In some embodiments, the surface of the torque adjustment component may also be provided with an anti-loosening structure, positioning protrusions, or limiting shims to improve stability after installation and prevent displacement during rotation.

[0090] As one possible implementation, the detection element 40 is at least one of an absolute encoder, an incremental encoder, a Hall sensor, an optocoupler sensor, and a magnetoresistive angle sensor.

[0091] For example, the absolute encoder can be a single-turn or multi-turn type, and can be directly mounted on the rotating component 20 at the pivot point 21 to output the corresponding absolute angle value. The incremental encoder can be photoelectric incremental or magnetoelectric incremental, and can be connected to the rotating component 20 through a coupling or gear pair to output relative displacement information. The Hall sensor and the magnetoresistive angle sensor can be set in the circumference of the rotating component 20 and cooperate with the magnet to achieve non-contact detection. The Hall sensor can be in the form of an integrated chip and cooperate with a ring magnet, and the magnetoresistive angle sensor can be an angle measurement chip based on the magnetoresistive effect. The optocoupler sensor can be composed of a light-emitting diode and a photosensitive receiver, and can modulate the light path through a shielding disc or an encoder disc to output angle information, thereby ensuring continuous detection while reducing mechanical wear.

[0092] The detection components 40 described above can all acquire high-resolution data on the angular displacement of the rotating component 20 under the action of the carrier belt 50, and convert the rotation angle of the rotating component 20 into an electrical or digital signal to achieve real-time detection of the rotation angle at the pivot point 21. The detection results are then transmitted to the controller so that the controller can determine the current tension state of the carrier belt 50 based on the angle change and perform corresponding adjustments, thereby improving the accuracy of tension force detection and the consistency of adjustment response.

[0093] As one feasible implementation, a damper is provided on the pivot point 21.

[0094] The damper can be understood as an energy-dissipating mechanism between the rotating component 20 and the support base 10. It is used to apply a speed-related damping torque to the swing process of the rotating component 20 to suppress the high-frequency angular fluctuations caused by intermittent vibration of the carrier belt 50, conveying impact, or external disturbances. This reduces the overshoot and rebound of the rotating component 20 when it is close to the equilibrium position and reduces the jitter amplitude of the angle signal collected by the detection component 40, so that the controller can make tension adjustment judgments based on smoother angle changes.

[0095] For example, the damper may be located at or near the pivot point 21, or connected to the support 10 via a swing arm, friction pair, or magnetic coupling structure to provide appropriate damping without significantly increasing the moment of inertia.

[0096] For example, the damper can be implemented as a hydraulic damper, a magnetorheological damper, or a friction damper. A hydraulic damper can create viscous damping by the movement of a piston in damping oil. A magnetorheological damper can adjust the damping torque by changing the rheological properties of the magnetorheological fluid using a magnetic field. A friction damper can create adjustable frictional resistance using friction plates, elastic clamping elements, or preload springs. The damper housing can be made of metal, and the damping medium can be silicone oil, magnetorheological fluid, or wear-resistant friction material. Related contact parts can be made of alloy steel, aluminum alloy, or engineering plastics to balance strength and wear resistance. The damping coefficient of this damper is adapted to the mass, moment of inertia, and target response speed of the rotating component 20, and can be adjusted by changing the damping orifice diameter, friction preload, or magnetic field strength.

[0097] Based on this, when the rotating part 20 deflects at an angle under the traction of the carrier belt 50, the damper buffers its movement, making the angle change more continuous and stable, thereby reducing the impact of external disturbances on angle detection and tension control.

[0098] On the other hand, this application provides a material conveying device, including: a carrier belt 50 and the above-mentioned carrier belt tension control device, the carrier belt tension control device is disposed on one side of the carrier belt 50, and the rotating part 20 of the carrier belt tension control device abuts against the carrier belt 50.

[0099] It is understood that since the technical solution of the embodiments of this application adopts the technical solution of the above-mentioned carrier belt tension control device, it has at least the beneficial effects brought about by the above-mentioned carrier belt tension control device, which will not be elaborated here.

[0100] During the conveying process of the carrier belt 50, the carrier belt tension control device located on one side of the carrier belt 50 directly abuts against the carrier belt 50 via the rotating component 20. This allows the tension state of the carrier belt 50 to act on the rotating component 20 and be converted into a detectable rotational change, facilitating real-time sensing of the tension of the carrier belt 50 during operation by the control device. Simultaneously, the control device can adjust the tension of the carrier belt 50 based on this rotational change, enabling the material conveying equipment to effectively detect and control the carrier belt tension under relatively simplified structural conditions. This, in turn, improves the stability, responsiveness, and conveying reliability of the carrier belt 50 during the conveying process.

[0101] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0102] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0103] It should be noted that 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 an 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 a process, method, article, or apparatus.

[0104] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A device for controlling the tension of a carrier belt, characterized in that, include: Support base (10); Rotating component (20) is rotatably connected to the support base (10), and the rotating component (20) is used to abut against the carrier belt (50); the connection between the rotating component (20) and the support base (10) forms a pivot point (21), and in the plumb direction, the pivot point (21) and the center of gravity of the rotating component (20) are offset from each other; Reel (30) for winding and unwinding or winding and tightening the carrier tape (50); A detection element (40) is disposed at the pivot point (21), and the detection element (40) is used to detect the rotation angle of the rotating element (20); The controller is electrically connected to the detection element (40). The controller controls the reel (30) to wind and unwind or wind and tighten the carrier belt (50) according to the rotation angle of the rotating element (20) in order to control the tension of the carrier belt (50).

2. The control device for the tension of the carrier belt according to claim 1, characterized in that, The mass of the rotating component (20) is m, and the distance between the pivot point (21) and the center of gravity of the rotating component (20) is L. g The distance between the contact point between the rotating member (20) and the carrier belt (50) and the pivot point (21) is L. t The tension of the carrier belt (50) is T, and the deflection angle of the center of gravity of the rotating member (20) relative to the pivot point (21) in the plumb direction is θ. The T and the m, the L g The L t The following conditions must be met between θ: T = (m × g × L) g / L t )×sinθ, where g is the acceleration due to gravity.

3. The control device for the tension of the carrier belt according to claim 2, characterized in that, The rotation angle of the rotating component (20) is α, and the rotating component (20) has a first preset angle and a second preset angle, the first preset angle being α1 and the second preset angle being α2; the carrier belt (50) has a slack state, a balanced state and an over-tight state; When α is less than α1, the carrier tape (50) is in a relaxed state; When α is greater than or equal to α1 and less than or equal to α2, the carrier tape (50) is in a balanced state; When α is greater than α2, the carrier tape (50) is in an over-tight state.

4. The control device for the tension of the carrier belt according to claim 3, characterized in that, It also includes a drive unit, which is electrically connected to the controller, and the drive unit is used to drive the reel (30) to wind and unwind or wind and tighten the carrier tape (50). When α is less than α1, the controller controls the drive to increase the drive speed, and the reel (30) winds and tightens the carrier belt (50) to increase the tension of the carrier belt (50) so that the carrier belt (50) is in a balanced state. When α is greater than α2, the controller controls the drive to reduce the drive speed, and the reel (30) winds up and unwinds the carrier belt (50) to reduce the tension of the carrier belt (50) so that the carrier belt (50) is in a balanced state.

5. The control device for the tension of the carrier belt according to any one of claims 1-4, characterized in that, The support base (10) includes a support part (11) and a connecting part (12). One end of the connecting part (12) is fixedly connected to the support part (11), and the other end of the connecting part (12) is rotatably connected to the rotating member (20). The rotatable connection between the connecting part (12) and the rotating member (20) forms the rotation fulcrum (21).

6. The control device for the tension of the carrier belt according to claim 5, characterized in that, The support base (10) further includes a first limiting member and a second limiting member, which are disposed on opposite sides of the rotating member (20) along the rotation direction to limit the rotation angle of the rotating member (20). The first limiting member and the second limiting member form an angle with the line connecting the pivot point (21), and the angle is less than or equal to the maximum rotation angle of the rotating member (20).

7. The control device for the tension of the carrier belt according to any one of claims 1-4, characterized in that, The rotating member (20) has an abutting surface (22) for abutting against the carrier belt (50), and a roller is provided on the abutting surface (22).

8. The control device for the tension of the carrier belt according to any one of claims 1-4, characterized in that, The rotating component (20) is provided with a plurality of torque adjustment positions, and the rotating component (20) further includes a torque adjustment component, which is detachably installed on one of the plurality of torque adjustment positions.

9. The control device for the tension of the carrier belt according to any one of claims 1-4, characterized in that, The detection element (40) is at least one of an absolute encoder, an incremental encoder, a Hall sensor, an optocoupler sensor, and a magnetoresistive angle sensor; And / or, a damper is provided on the pivot point (21).

10. A material conveying device, characterized in that, include: Carrier tape (50); The carrier belt tension control device according to any one of claims 1-9, wherein the carrier belt tension control device is disposed on one side of the carrier belt (50), and the rotating part (20) of the carrier belt tension control device abuts against the carrier belt (50).

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