A protection device for a gantry double-drive synchronous motion system with adjustable margin

Abstract

This utility model relates to the field of mechanical engineering, and more particularly to a protection device for a gantry dual-drive synchronous motion system with adjustable margin. The dual-drive synchronous mechanism consists of two transmission mechanisms, each containing a dual-axis motor, lead screw, pulley, and belt, providing power to the crossbeam. The crossbeam moving mechanism includes a crossbeam and a base, with lead screws connected to both ends of the crossbeam. Position sensors are installed on the crossbeam to detect the relative height of the two ends to ensure synchronization. The protection mechanism includes a limiting component and a tensioning component. The tensioning component is used to adjust the tension of the transmission belt, achieving adjustable margin to adapt to different working conditions. The limiting component not only restricts the movement range of the synchronous pulley, but its limiting position is also adjustable, thereby setting the allowable working range margin of the synchronous pulley. This invention ensures the motion synchronization of the gantry system through position sensor feedback and dual margin adjustment, and improves the reliability and adaptability of the system by protecting key components through limiting.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering, and in particular to a protection device for a gantry dual-drive synchronous motion system with adjustable margin. Background Technology

[0002] Gantry dual-drive systems are widely used in large equipment in automation and machine tool industries due to their fast dynamic response, higher positioning accuracy, strong anti-interference ability, and good stability. However, during the operation of a gantry dual-drive system, there are certain deviations in the response time and speed of the dual-axis motors. When these deviations accumulate to a certain extent, they can lead to uneven stress on both sides of the crossbeam during operation, causing torsional deformation, affecting positioning accuracy, reducing the service life of components, and in severe cases, causing structural fracture of the equipment and posing certain safety hazards.

[0003] During the operation of the gantry dual-drive system, the rotation speed and response time of each motor shaft will have certain deviations. After the deviations accumulate, they will eventually cause the crossbeam to bear asymmetrical tension or thrust, resulting in uneven load distribution. This causes the crossbeam to flex or torsion, affecting the motion accuracy and the life of equipment components, reducing the equipment's working time and increasing maintenance costs. Utility Model Content

[0004] Therefore, this utility model provides a gantry dual-drive synchronous motion system protection device with adjustable margin to overcome the aforementioned problems in the prior art.

[0005] To achieve the above objectives, this utility model provides a gantry dual-drive synchronous motion system protection device with adjustable margin, comprising a dual-drive synchronous mechanism, a crossbeam moving mechanism, and a protection mechanism. The dual-drive synchronous mechanism consists of two identical transmission mechanisms, each including a dual-axis motor, a lead screw, a pulley, and a belt. The pulley and the dual-axis motor are connected via the belt. The crossbeam moving mechanism includes a crossbeam and a base. The lead screw is connected to both ends of the crossbeam, and a position sensor is provided on the crossbeam to detect the relative height between the two ends of the crossbeam. Upon receiving the height signal, the two ends of the crossbeam are respectively connected to the lead screw, and the two ends of the base are provided with lead screw fixing seats. The two ends of the lead screw pass through the lead screw fixing seats. The protection mechanism includes a limiting component and a tensioning component. The tensioning component is used to adjust the tension of the synchronous belt. It includes a synchronous pulley and a synchronous belt. The synchronous pulleys are respectively disposed below the pulleys. The two ends of the synchronous belt are respectively connected to the synchronous pulleys. The synchronous pulleys and the pulleys are connected by a shaft and are vertically aligned. The limiting component is located below the synchronous pulleys and is used to limit the movement range of the synchronous pulleys.

[0006] Furthermore, the limiting component includes a rotating limiting block and a limiting ring for mounting below the synchronizing wheel, and the synchronization error is obtained by detecting the relative position of the rotating limiting block and the limiting ring based on the height signal.

[0007] Furthermore, the tensioning assembly also includes a tensioning wheel for maintaining the tension of the timing belt, an adapter, and a limiting plate for defining the timing belt, wherein the tensioning wheel is fixed to the base via the adapter.

[0008] Furthermore, the tensioning wheel has an elongated hole for adjusting the initial tension of the synchronous belt, and the tensioning wheel is equipped with a spring mechanism to keep the synchronous belt in a tensioned state during transmission.

[0009] Furthermore, in its initial state, the end of the limiting rotating block is inserted into the limiting ring and is in a centered position.

[0010] Furthermore, the limiting ring is clamped to the end of the lead screw shaft by bolt connection, and the limiting ring has a margin space to allow the end of the rotating limiting block to rotate and move.

[0011] Furthermore, the spring mechanism includes a spring and an adjusting screw. The compression of the spring is adjusted by adjusting the screw, thereby adjusting the tension of the timing belt.

[0012] Furthermore, the base includes a horizontal plate and a fixed plate. The two ends of the horizontal plate are respectively connected to the same end of the fixed plate. A rectangular through groove is provided in the center of the fixed plate. One end of the through groove is in contact with the plane of the horizontal plate, and the other end of the through groove is on one side of the lead screw fixing seat. The horizontal plate and the fixed plate are integrally formed.

[0013] Furthermore, when the dual-axis motors are out of sync, the rotation limit block and the limit ring are stuck.

[0014] Furthermore, it also includes a servo driver for detecting the operating current of the dual-axis motor. When the operating current exceeds a set threshold, the driver controls the dual-axis motor to be powered off, stopping the gantry dual-drive system from operating.

[0015] Compared with existing technologies, the advantages of this invention lie in achieving high-precision synchronous motion through the precise configuration of two dual-axis motors, two lead screws, and synchronous pulleys and belt pulleys, effectively reducing errors during the motion process. The combination of the synchronous belt and tensioning assembly ensures proper belt tension, avoiding transmission instability caused by excessive tightness or looseness, thereby enhancing the stability of the entire system. The design of the limiting and tensioning components allows for adjustable system margins, enabling adjustments based on actual working needs and adapting to different working environments and conditions.

[0016] In particular, by detecting the relative position of the rotating limit block and the limit ring, the rotation state of the synchronous wheel 13 can be obtained in real time, thereby accurately calculating the synchronization error. This helps the control system to more effectively compensate for errors and ensure that the movement height of both ends of the crossbeam is synchronized. Real-time monitoring and compensation of synchronization errors can effectively reduce vibration and impact caused by poor synchronization, and improve the operational stability of the system. A stable operating environment is conducive to extending the service life of the equipment and reducing maintenance costs. The rotating limit block 31 and the limit ring 32 have a simple structure and are easy to install. This design simplifies the overall system structure and reduces manufacturing costs and installation difficulty.

[0017] In particular, the tensioning pulley, fixed to the base via an adapter, provides a continuous and stable tension, ensuring the synchronous belt maintains appropriate tension during operation and thus avoiding transmission errors caused by slack. The effective operation of the tensioning assembly ensures the stable operation of the synchronous belt and enhances the stability of the entire gantry dual-drive synchronous motion system.

[0018] In particular, the elongated bore design allows the tensioning pulley to move within a certain range, thus enabling flexible adjustment of the initial tension of the timing belt and ensuring that the timing belt achieves the ideal tension during installation. The spring mechanism provides continuous elasticity, keeping the timing belt taut throughout the transmission process, effectively preventing transmission errors and efficiency reduction caused by slack.

[0019] In particular, since the rotating limit block can rotate freely within the margin space, it reduces direct friction with the lead screw shaft end, reduces wear, and extends the service life of the component. Attached Figure Description

[0020] Figure 1 A schematic diagram of a protection device for a gantry dual-drive synchronous motion system with adjustable margin provided for an embodiment of this utility model;

[0021] Figure 2 A partially enlarged view of a portion of a protection device for a gantry dual-drive synchronous motion system with adjustable margin, provided for an embodiment of this utility model;

[0022] Figure 3 A partially enlarged view of another part of a gantry dual-drive synchronous motion system protection device with adjustable margin provided for an embodiment of this utility model;

[0023] Figure 4 A bottom view of a gantry dual-drive synchronous motion system protection device with adjustable margin provided in an embodiment of this utility model;

[0024] Figure 5 A partially enlarged bottom view of a protective device for a gantry dual-drive synchronous motion system with adjustable margin, provided for an embodiment of this utility model;

[0025] Figure 6 A schematic diagram of the collision between the end of the limiting rotating block and the limiting block in a protection device for a gantry dual-drive synchronous motion system with adjustable margin, provided for an embodiment of this utility model;

[0026] Reference numerals in the attached diagram: 11. Dual-axis motor; 12. Lead screw; 13. Synchronous pulley; 14. Pulley; 15. Synchronous belt; 16. Belt; 21. Crossbeam; 22. Base; 23. Lead screw fixing seat; 221. Cross plate; 222. Fixing plate; 31. Rotation limit block; 32. Limiting ring; 41. Tensioning wheel; 42. Adapter; 43. Limiting plate. Detailed Implementation

[0027] To make the objectives and advantages of this utility model clearer, the present utility model will be further described below with reference to the embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0028] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0029] It should be noted that in the description of this utility model, the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model provides a gantry dual-drive synchronous motion system protection device with adjustable margin, including a dual-drive synchronous mechanism, a crossbeam moving mechanism, and a protection mechanism. The dual-drive synchronous mechanism consists of two identical transmission mechanisms. Each transmission mechanism includes a dual-axis motor 11, a lead screw 12, a pulley 14, and a belt 16. The pulley 14 and the dual-axis motor 11 are connected by the belt 16. The crossbeam moving mechanism includes a crossbeam 21 and a base 22. The two ends of the crossbeam 21 are respectively connected to the lead screw. A position sensor is provided on the crossbeam 21. The position sensor detects the relative height between the two ends of the crossbeam 21 to obtain a height signal. The two ends of the crossbeam 21 are respectively connected to the lead screw 12, and the two ends of the base 22 are provided with lead screw fixing seats 23. The two ends of the lead screw 12 pass through the lead screw fixing seats 23 respectively. The protection mechanism includes a limiting component and a tensioning component. The tensioning device is used to adjust the tension of the synchronous belt 15. It includes a synchronous pulley 13 and a synchronous belt 15. The synchronous pulley 13 is respectively disposed below the pulley 14. The two ends of the synchronous belt 15 are respectively connected to the synchronous pulley 13. The synchronous pulley 13 and the pulley 14 are connected by a shaft and are vertically aligned. The limiting component is located below the synchronous pulley 13 and is used to limit the movement range of the synchronous pulley 13.

[0032] Specifically, two dual-axis motors 11 start simultaneously, driving pulleys 14 via belts 16. Pulleys 14, connected to shafts, drive synchronous pulleys 13 to rotate. Pulleys 14, connected to the belts 16 of the dual-axis motors 11, drive lead screws 12 to rotate. Due to belt drive, the rotational speed of pulleys 14 is synchronized with that of motors 11. Pulleys 14 drive synchronous pulleys 13 to rotate via the same shaft. Synchronous pulleys 13 transmit rotational motion to pulleys 14 at the other end via synchronous belts 15. The pulleys 14 at both ends drive their respective lead screws 12 to rotate. Lead screws 12 synchronously drive the crossbeam 21 to move along the guide rail via threads. Position sensors detect the relative height difference between the two ends of the crossbeam 21 in real time and feed the height difference signal back to the control system. If the control system detects that the height difference exceeds a set threshold (i.e., the synchronization error exceeds the allowable range), the control system compares the height difference signal fed back by the position sensors with the preset allowable range. If the height difference is within the allowable range, the system considers the synchronization good and continues to move according to the instructions. If the height difference exceeds the allowable range (but protection is not triggered), the control system activates the synchronization compensation algorithm. This includes fine-tuning the speed commands of the two motors, accelerating the lagging side or decelerating the leading side. The control system can determine that the height difference is caused by belt slippage. In this case, it can (within a safe deceleration or pause state) fine-tune the tensioning assembly, slightly increasing the tension of the timing belt 15 and belt 16 to improve transmission efficiency, reduce slippage, and thus restore synchronization. The amount of tension adjustment is controllable, and the system continues to move after adjustment. A limit assembly is installed below the timing pulley 13 to limit its range of movement and prevent excessive movement during operation. The tensioning assembly ensures the stability of the belt drive. The position sensor and control system work together to monitor and adjust the synchronization status in real time, preventing mechanical failures or accidents caused by asynchrony.

[0033] Specifically, two identical transmission mechanisms drive the two ends of the crossbeam respectively. The synchronization of the crossbeam's movement is ensured through the cooperation of synchronous belts and pulleys. The control system can adjust the speed or phase difference between the two transmission mechanisms to adjust the synchronization margin, adapting to different loads and accuracy requirements. Position sensors monitor the relative height of the two ends of the crossbeam in real time, promptly detecting and correcting synchronization errors. Limiting components act as mechanical protection, preventing mechanical damage caused by overshoot or asynchrony.

[0034] Specifically, the limiting component includes a rotating limiting block 31 and a limiting ring 32 for mounting below the synchronizing wheel 13, and the synchronization error is obtained by detecting the relative position of the rotating limiting block 31 and the limiting ring 32 based on the height signal.

[0035] Specifically, when the movements at both ends of the crossbeam 21 are asynchronous, it will cause a deviation in the rotation angle or position of the two synchronous wheels 13. Since the rotation limit block 31 is coaxially connected to the synchronous wheels 13, the rotation angle or position of the rotation limit block 31 will also change accordingly. A position sensor is installed on the crossbeam 21 to detect the relative height between the two ends of the crossbeam and output a height signal. This height signal reflects the tilt state of the crossbeam 21 and indirectly reflects the synchronization error of the two synchronous wheels 13. By analyzing the relative position change of the rotation limit block 31 and the limit ring 32, and combining it with the height signal of the crossbeam 21, the synchronization error between the two synchronous wheels 13 can be calculated. Specifically, the control system can calculate the difference in rotation angle or position deviation of the two synchronous wheels 13 based on the position change of the rotation limit block 31 relative to the limit ring 32 and the height signal of the crossbeam 21 using a preset algorithm, thereby obtaining the value of the synchronization error.

[0036] Specifically, by detecting the relative positions of the rotating limit block and the limit ring, the rotational state of the synchronous wheel can be obtained in real time, thereby accurately calculating the synchronization error. This helps the control system to more effectively compensate for errors and ensure that the movement height of both ends of the crossbeam 21 is synchronized. Real-time monitoring and compensation of synchronization errors can effectively reduce vibration and impact caused by poor synchronization, improving the operational stability of the system. A stable operating environment helps extend the service life of the equipment and reduce maintenance costs. The rotating limit block 31 and the limit ring 32 have a simple structure and are easy to install. This design simplifies the overall system structure and reduces manufacturing costs and installation difficulty.

[0037] Specifically, the tensioning assembly also includes a tensioning wheel 41 for maintaining the tension of the timing belt, an adapter 42, and a limiting plate 43 for defining the timing belt 15. The tensioning wheel 41 is fixed to the base 22 by the adapter 42.

[0038] Specifically, select a suitable tension pulley based on the model and width of the timing belt, ensuring it matches the belt. The tension pulley material should have good wear resistance and strength to withstand long-term operating pressure. Design an adapter to connect the tension pulley and the base, allowing the tension pulley to adjust its position within a certain range. The adapter should have sufficient strength and stability to ensure the tension pulley is securely fixed. Fabricate a limiting plate whose shape and size match the path of the timing belt to effectively limit its position. The limiting plate should have sufficient rigidity to prevent deformation during operation. Secure the tension pulley to the base using the adapter, ensuring it is secure with bolts or other fasteners. Adjust the position of the tension pulley to align it with the path of the timing belt. Install the limiting plate close to the timing belt, ensuring the timing belt remains within the limiting plate's range during operation. The limiting plate should be securely fixed without loosening or displacement. Manually adjust the position of the tension pulley to achieve initial tension on the timing belt. Use a tension gauge or other measuring tools to check the tension of the timing belt, ensuring it is within the recommended range.

[0039] Specifically, the tensioning pulley is fixed to the base via an adapter, providing a continuous and stable tension force to ensure the synchronous belt maintains appropriate tension during operation, thereby avoiding transmission errors caused by slack. The effective operation of the tensioning assembly ensures the stable operation of the synchronous belt and enhances the stability of the entire gantry dual-drive synchronous motion system.

[0040] Specifically, the tensioning wheel 41 has an elongated hole for adjusting the initial tension of the synchronous belt 15, and the tensioning wheel 41 is provided with a spring mechanism to keep the synchronous belt 15 in a tensioned state during transmission.

[0041] Specifically, the timing belt is installed onto the timing pulley and belt pulley. The tensioner is then installed onto the timing belt, and its position is adjusted using the oblong hole to achieve initial tension. The tension of the timing belt is further adjusted by rotating the fixing bolt within the oblong hole. A tension gauge is used to determine the tension of the timing belt, ensuring it meets design requirements. During transmission, the spring mechanism continuously provides elastic force, keeping the tensioner pressed firmly against the timing belt and maintaining its tension. The spring force should be sufficient to compensate for any slack in the timing belt caused by factors such as temperature and wear during operation.

[0042] Specifically, the elongated bore design allows the tensioning pulley to move within a certain range, thus enabling flexible adjustment of the initial tension of the timing belt and ensuring that the timing belt achieves the ideal tension upon installation. The spring mechanism provides continuous elasticity, keeping the timing belt taut throughout the transmission process, effectively preventing transmission errors and efficiency reduction caused by slack.

[0043] Specifically, such as Figure 5As shown, in the initial state, the end of the limiting rotating block 31 is inserted into the limiting ring 32 and is in the center position.

[0044] Specifically, place the limiting rotating block in the predetermined position, ensuring its relative position with components such as the timing pulley and the limiting ring is correct. Gently push the limiting rotating block so that its end gradually inserts into the limiting ring. After the end of the limiting rotating block is inserted into the limiting ring, initially observe whether its position is centered. If the limiting rotating block is not centered, rotate or fine-tune its position until it is centered. Use auxiliary tools such as feeler gauges to measure the gaps and ensure that the gaps on both sides are uniform.

[0045] Specifically, a limiting ring is inserted into and centered at the end of the limiting rotating block, ensuring the accuracy of the initial position and thus improving the synchronization accuracy of the entire system. This reduces synchronization errors caused by initial position deviations, making the system operate more stably.

[0046] Specifically, the limiting ring 32 is clamped to the end of the lead screw 12 shaft by bolt connection, and the limiting ring 32 has a margin space to allow the end of the rotating limiting block 31 to rotate and move.

[0047] Specifically, align the limiting ring with the end of the lead screw shaft, ensuring it is perpendicular to the shaft. Pre-connect the limiting ring to the lead screw shaft end using bolts, but do not tighten them completely to allow for position adjustment. Use a measuring tool (such as calipers) to measure the clearance between the end of the rotating limiting block and the inner wall of the limiting ring, ensuring sufficient margin. Based on the measurement, fine-tune the position of the limiting ring to ensure the end of the rotating limiting block can rotate freely within the ring. After confirming the margin is appropriate, tighten the bolts with a wrench to ensure the limiting ring is securely clamped to the end of the lead screw shaft.

[0048] Specifically, since the rotating limit block can rotate freely within the margin space, it reduces direct friction with the lead screw shaft end, reduces wear, and extends the service life of the component.

[0049] Specifically, the spring mechanism includes a spring and an adjusting screw. The compression of the spring is adjusted by adjusting the screw, thereby adjusting the tension of the timing belt.

[0050] Specifically, place the spring in the predetermined position, ensuring it is correctly aligned with the tensioner pulley, base, and other components. Pass the adjusting screw through the spring and align it with the threaded hole on the tensioner pulley or base. Initially, do not fully tighten the adjusting screw, maintaining a certain degree of looseness. Use a wrench or screwdriver to rotate the adjusting screw, compressing the spring to a certain extent. The initial compression should be preset according to the design tension requirements of the timing belt. Manually rotate the tensioner pulley to adjust the tension of the timing belt. Use a tension meter or other measuring tools for precise measurement, ensuring the tension is within a reasonable range. Based on the test results, further rotate the adjusting screw to fine-tune the spring compression. Ensure the timing belt is neither too loose nor too tight during operation.

[0051] Specifically, by precisely adjusting the spring compression, the timing belt can maintain appropriate tension under different loads and operating conditions, thereby improving the synchronization accuracy of the gantry dual-drive synchronous motion system. Appropriate timing belt tension effectively reduces vibration and bounce during operation, enhancing the stability and reliability of the entire motion system. Timing belts that are too tight or too loose will accelerate wear. Precisely controlling the tension by adjusting the screws can prevent excessive stretching or loosening of the timing belt, thus extending its service life.

[0052] Specifically, the base 22 includes a horizontal plate 221 and a fixing plate 222. The two ends of the horizontal plate 221 are respectively connected to the same end of the fixing plate 222. The fixing plate 222 has a rectangular through groove in the center. One end of the through groove is in contact with the plane of the horizontal plate 221, and the other end of the through groove is on one side of the lead screw fixing seat 23. The horizontal plate 221 and the fixing plate 222 are integrally formed.

[0053] Specifically, the rectangular through-slot design allows for the installation and adjustment of lead screws or other components. One end of the slot contacts the plane of the cross plate, facilitating the positioning and fixing of components, while the other end is located on one side of the lead screw fixing seat, which is beneficial for the installation and disassembly of the lead screw.

[0054] Specifically, it also includes a servo driver for detecting the operating current of the dual-axis motor. When the operating current exceeds a set threshold, the driver controls the dual-axis motor to be powered off, stopping the gantry dual-drive system from operating.

[0055] Specifically, a reasonable operating current threshold is set based on the rated current and operating characteristics of the dual-axis motor. Considering transient overcurrent conditions, a short-term overcurrent allowable value can be set. The servo drive is programmed to implement real-time current detection and comparison functions. When the detected current exceeds the set threshold, automatic power-off control is implemented through programming. The servo drive is correctly connected to the dual-axis motor, power supply, and control system. Ensure the current sensor signal line is connected to the corresponding input port of the servo drive. The entire system is powered on and tested to check the circuit connections for correctness. The current detection and power-off control functions of the servo drive are tested by simulating overcurrent conditions. An emergency stop button is installed on the servo drive for manual power disconnection in abnormal situations. Redundant protection devices, such as circuit breakers or fuses, can be added to provide additional safety protection.

[0056] Specifically, by monitoring the operating current of the dual-axis motor in real time and automatically cutting off the power when it exceeds a set threshold, the dangers of motor overload and overheating are effectively prevented, greatly improving the safety performance of the equipment.

[0057] Specifically, such as Figure 6 As shown, when the dual-axis motors are out of sync, the rotation limit block and the limit ring are stuck.

[0058] Specifically, due to the relatively long length of the synchronous belt, misalignment can occur during the operation of the gantry dual-drive system, causing the synchronous belt to lose its dual-shaft synchronization function. To prevent this, a limit plate is installed on the tensioning pulley to restrict the displacement of the synchronous belt, ensuring that the tensioning pulley and the synchronous belt remain in contact during operation, thus guaranteeing the reliability and stability of the gantry dual-drive system. A rotating limit block is installed at the lower end of the synchronous pulley. Initially, its end is inserted into the limit ring and centered. The limit ring is bolted to the end of the lead screw shaft 2, with sufficient margin for the rotating limit block end to rotate. When both motors rotate synchronously, the rotating limit block end should always remain centered on the limit ring. When the two motors are not synchronized, and the synchronization error is large, the rotating limit block end on one side will collide and interfere with the limit ring. At this time, due to the mechanical jamming of the rotating limit block and the limit ring, the coaxial lead screw and motor should also stop operating. If the motor continues to operate as instructed and the gantry continues running, the servo driver can detect that the motor current is higher than the set current. This allows for the setting of a threshold for the motor's operating current, thus protecting the gantry dual-drive system. The protection process involves "dual-axis motor asynchrony - rotation limit block and limit ring jamming - motor current increase exceeding the threshold - motor power-off protection - gantry stopping operation," reducing safety hazards during gantry dual-drive operation.

[0059] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

[0060] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protection device for a gantry double drive synchronous motion system with adjustable margin, characterized in that, The system includes a dual-drive synchronization mechanism, a crossbeam moving mechanism, and a protection mechanism. The dual-drive synchronization mechanism consists of two identical transmission mechanisms, each including a dual-axis motor, a lead screw, a pulley, and a belt. The pulley and the dual-axis motor are connected via the belt. The crossbeam moving mechanism includes a crossbeam and a base. The two ends of the crossbeam are connected to the lead screw, and a position sensor is provided on the crossbeam to detect the relative height between the two ends of the crossbeam to obtain a height signal. The two ends of the crossbeam are connected to the lead screw, and the base has lead screw fixing seats at both ends, with the two ends of the lead screw passing through the lead screw fixing seats. The protection mechanism includes a limiting component and a tensioning component. The tensioning component is used to adjust the tension of the synchronous belt and includes a synchronous pulley and a synchronous belt. The synchronous pulleys are respectively located below the pulleys, and the two ends of the synchronous belt are respectively connected to the synchronous pulleys. The synchronous pulleys and pulleys are connected by a shaft and are vertically aligned. The limiting component is located below the synchronous pulleys and is used to limit the movement range of the synchronous pulleys.

2. The tolerance-adjustable gantry double-drive synchronous motion system protection device according to claim 1, characterized in that, The limiting component includes a rotating limiting block and a limiting ring for mounting below the synchronous wheel, and the synchronization error is obtained by detecting the relative position of the rotating limiting block and the limiting ring based on the height signal.

3. The protection device for a gantry dual-drive synchronous motion system with adjustable margin according to claim 2, characterized in that, The tensioning assembly also includes a tensioning wheel for maintaining the tension of the timing belt, an adapter, and a limiting plate for defining the timing belt. The tensioning wheel is fixed to the base via the adapter.

4. The protection device for a tolerance-adjustable gantry double-drive synchronous motion system according to claim 3, characterized in that, The tensioning wheel has an elongated hole for adjusting the initial tension of the synchronous belt, and a spring mechanism is provided on the tensioning wheel to keep the synchronous belt in a tensioned state during transmission.

5. The adjustable tolerance gantry dual drive synchronous motion system protection device of claim 4, wherein, In its initial state, the end of the limiting rotating block is inserted into the limiting ring and is in the center position.

6. The adjustable tolerance gantry dual drive synchronous motion system protection device of claim 5, wherein, The limiting ring is clamped to the end of the lead screw shaft by bolts, and the limiting ring has a margin space to allow the end of the rotating limiting block to rotate and move.

7. The adjustable tolerance gantry dual drive synchronous motion system protection device of claim 6, wherein, The spring mechanism includes a spring and an adjusting screw. The compression of the spring is adjusted by adjusting the screw, thereby adjusting the tension of the timing belt.

8. The adjustable tolerance gantry dual drive synchronous motion system protection device of claim 7, wherein, The base includes a horizontal plate and a fixed plate. The two ends of the horizontal plate are respectively connected to the same end of the fixed plate. A rectangular through groove is provided in the center of the fixed plate. One end of the through groove is in contact with the plane of the horizontal plate, and the other end of the through groove is on one side of the lead screw fixing seat. The horizontal plate and the fixed plate are integrally formed.

9. The adjustable tolerance gantry dual drive synchronous motion system protection device of claim 8, wherein, When the dual-axis motors are out of sync, the rotation limit block and the limit ring are stuck.

10. A protection device for a gantry dual-drive synchronous motion system with adjustable margin according to claim 9, characterized in that, It also includes a servo driver to detect the operating current of the dual-axis motor. When the operating current exceeds a set threshold, the driver controls the dual-axis motor to be powered off, stopping the gantry dual-drive system from running.

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