Rigidity detection equipment of crane
By using clamping and adaptive fixing components, the adaptability of crane inspection equipment to components of different widths has been solved, achieving stable fixing and accurate inspection data, thereby improving the versatility and inspection efficiency of the equipment.
Patent Information
- Application Number
- CN202423278499.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing crane stiffness testing equipment lacks adaptive fixing components, resulting in unstable fixing pressure, which affects the accuracy of test data. Furthermore, the equipment has poor versatility and cannot adapt to crane components of different widths.
The device employs a clamping assembly and an adaptive fixing assembly. The clamping assembly adapts to parts of different widths via a moving base, while the adaptive fixing assembly adjusts the pressure via a servo motor to ensure stable fixation. Detection is performed using pressure sensors and ultrasonic sensors.
It enables stable fixing of crane components of different widths, improves the compatibility of testing equipment and the stability of testing data, and reduces the trouble of equipment replacement and adjustment.
Smart Images
Figure CN223841424U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of crane testing equipment, specifically to a crane stiffness testing device. Background Technology
[0002] In the crane industry, existing technologies for crane stiffness testing have seen some development. Traditional testing methods often combine basic measuring tools with manual operation. For example, instruments such as levels and theodolites are commonly used. By setting measurement points at specific locations on the crane, data is manually read and analyzed to obtain key data such as the deformation of the crane structure under different working conditions, thereby making a preliminary assessment of its stiffness performance. Simultaneously, some testing methods incorporate sensors such as strain gauges to convert the strain generated by structural stress into electrical signals for acquisition and processing. This allows for more accurate monitoring of stress and strain in key areas, providing multi-dimensional data support for stiffness testing. These technologies, to a certain extent, ensure the implementation and advancement of crane stiffness testing. However, the existing technologies have the following problems:
[0003] Existing crane stiffness testing equipment lacks adaptive fixing components to precisely control pressure. When fixing crane components, excessive fixing pressure may damage the components, while insufficient fixing pressure may result in insecure fixing. This unstable fixing state severely interferes with the testing process, leading to inaccurate test data. Furthermore, the lack of clamping components in existing devices means that the equipment loses a flexible way to adjust the fixing width, greatly limiting its versatility. It can only test components within a specific width range, requiring the use of other specialized testing equipment for crane components of different widths, which increases equipment costs and testing complexity. Utility Model Content
[0004] This invention provides a stiffness testing device for a crane to solve the problems mentioned in the background art.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A stiffness testing device for a crane includes a base, a fixed frame fixedly connected to the top of the base, self-locking casters fixedly connected to the four corners of the bottom of the base, an L-shaped fixed plate fixedly connected to the center of the front side of the base, a central controller fixedly connected to the front side wall of the L-shaped fixed plate, a cylinder fixedly connected to the top of the fixed frame, the output end of the cylinder penetrating into the interior of the fixed frame and fixedly connected to a pressure plate, the outer wall of the output shaft of the cylinder slidingly connected to the fixed frame, a pressure sensor fixedly connected to the bottom of the pressure plate, a rectangular groove with a front-to-back orientation opened in the center of the top of the base, a plurality of ultrasonic sensors fixedly connected inside the rectangular groove, a clamping assembly provided on the top of the base, and two left-right symmetrical adaptive fixing assemblies provided inside the clamping assembly.
[0007] A further improvement of this utility model is that the central controller is electrically connected to the cylinder, pressure sensor one, and several ultrasonic sensors respectively.
[0008] A further improvement of this utility model is that the clamping assembly includes two side plates. The bottoms of the left and right side plates are fixedly connected to the top of the base. Bidirectional screws are rotatably connected to the front and rear sides of the opposite faces of the left and right side plates. Two symmetrical fixing plates are fixedly connected to the left side wall of the left side plate. A motor is fixedly connected to the front side wall of the front fixing plate. A worm is rotatably connected to the opposite faces of the front and rear fixing plates. The output end of the motor passes through the rear side wall of the front fixing plate and is fixedly connected to the worm. Two symmetrical worm wheels are meshed at the bottom of the worm. The left ends of the two bidirectional screws pass through the left side wall of the left side plate and are fixedly connected to the front and rear worm wheels respectively.
[0009] A further improvement of this utility model is that: the outer walls of the two bidirectional screws are threaded with two symmetrical movable seats, and the tops of the two movable seats are fixedly connected with two symmetrical fixed posts. The tops of the two fixed posts are fixedly connected with limit frames, and the central controller is electrically connected to the motor.
[0010] A further improvement of this utility model's technical solution is as follows: the adaptive fixing component includes a top plate, the top of which is fixedly connected to the inner top wall of the limiting frame, and a pressure sensor II fixedly connected to the inner bottom wall of the limiting frame. Two symmetrically arranged connecting rods are rotatably connected to the bottom of the top plate. A fixing block is rotatably connected to the end of each of the two connecting rods away from the top plate. A connecting rod II is rotatably connected to the bottom of each of the two fixing blocks. A bottom plate is rotatably connected to the end of each of the two connecting rods, which are symmetrically arranged and close to each other. A limiting pressure plate is fixedly connected to the bottom of the bottom plate. A servo motor is fixedly connected to the rear side wall of the rear fixing block. The output end of the servo motor passes through the front side wall of the rear fixing block and is fixedly connected to a screw. The front end of the screw passes through the front side wall of the front fixing block and is fixedly connected to a limiting block. The interior of the front fixing block is threadedly connected to the outer wall of the screw through a threaded hole. The central controller is electrically connected to the servo motor and the pressure sensor II, respectively.
[0011] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:
[0012] 1. This utility model provides a stiffness testing device for a crane. Through the set clamping components, the two moving seats on the left and right can move towards each other or away from each other, so as to adapt to crane components of different widths. Whether it is a narrow small connecting part or a wide large structural component, it can be effectively clamped. This flexibility greatly improves the compatibility of the testing device with different components and reduces the trouble of replacing or adjusting the device due to changes in component size.
[0013] 2. This utility model provides a stiffness testing device for a crane. Through the setting of an adaptive fixing component, the pressure sensor can monitor pressure changes in real time and dynamically adjust the fixing pressure by adjusting the servo motor to maintain the stable fixing of the component. This dynamic stabilization function is like an automatic balancing system, which can effectively deal with various interference factors in the testing process and ensure that the component is always in an ideal fixed state, thereby ensuring the stability and reliability of the test data. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0015] Figure 2 This is a partial structural schematic diagram of the present invention;
[0016] Figure 3 This is a schematic diagram of the clamping component structure of this utility model;
[0017] Figure 4 This is another schematic diagram of the clamping component structure of this utility model;
[0018] Figure 5 This is a schematic diagram of the adaptive fixing component structure of this utility model;
[0019] Figure 6 This is another schematic diagram of the adaptive fixed component structure of this utility model.
[0020] In the diagram: 10. Base; 11. Fixing frame; 12. Self-locking caster wheel; 13. L-shaped fixing plate; 14. Central controller; 15. Cylinder; 16. Pressure plate; 17. Pressure sensor one; 18. Rectangular groove; 19. Ultrasonic sensor; 2. Clamping assembly; 20. Side plate; 21. Fixing plate; 22. Motor one; 23. Worm gear; 24. Worm wheel; 25. Bidirectional screw; 26. Moving seat; 27. Fixing column; 28. Limiting frame; 3. Adaptive fixing assembly; 31. Pressure sensor two; 32. Top plate; 33. Connecting rod one; 34. Fixing block; 35. Servo motor; 36. Connecting rod two; 37. Screw; 38. Base plate; 39. Limiting pressure plate. Detailed Implementation
[0021] To make the technical means, creative features, objectives, and effects of this utility model easier to understand, the following describes this utility model in conjunction with specific embodiments:
[0022] like Figure 1 , Figure 2 As shown, this utility model provides a stiffness testing device for a crane, including a base 10, a fixed frame 11 fixedly connected to the top of the base 10, self-locking casters 12 fixedly connected to the four corners of the bottom of the base 10, an L-shaped fixed plate 13 fixedly connected to the middle of the front side of the base 10, a central controller 14 fixedly connected to the front side wall of the L-shaped fixed plate 13, a cylinder 15 fixedly connected to the top of the fixed frame 11, the output end of the cylinder 15 penetrating into the interior of the fixed frame 11 and fixedly connected to a pressure plate 16, the outer wall of the output shaft of the cylinder 15 slidingly connected to the fixed frame 11, a pressure sensor 17 fixedly connected to the bottom of the pressure plate 16, a rectangular groove 18 with a front-to-back orientation opened in the middle of the top of the base 10, a number of ultrasonic sensors 19 fixedly connected inside the rectangular groove 18, a clamping assembly 2 provided on the top of the base 10, and two left-right symmetrical adaptive fixing assemblies 3 provided inside the clamping assembly 2.
[0023] like Figure 1 , Figure 2 As shown, the central controller 14 is electrically connected to the cylinder 15, the pressure sensor 17, and several ultrasonic sensors 19.
[0024] The base 10 is a rectangular metal plate structure, made of high-quality carbon steel, which has sufficient strength and stability. The four corners of the bottom of the base 10 are fixed with self-locking casters 12 by bolts. The self-locking casters 12 facilitate the movement and positioning of the equipment in workshops and other places. The central controller 14 adopts a programmable logic controller (PLC) to accurately control the various electrical components of the equipment. It also has a display screen. The pressure sensor 17 and pressure sensor 31 have a range of 0-5000N and an accuracy of 0.1%FS. A rectangular groove 18 with a front-to-back orientation is opened in the center of the top of the base 10. The ultrasonic sensor 19 inside the rectangular groove 18 is of model HC-SR04 and can be used to detect the slight deformation of the crane components under stress.
[0025] like Figure 3 , Figure 4 As shown, the clamping assembly 2 includes two side plates 20. The bottom of the left and right side plates 20 is fixedly connected to the top of the base 10. Both the front and rear sides of the opposite sides of the left and right side plates 20 are rotatably connected to bidirectional screws 25. The left side wall of the left side plate 20 is fixedly connected to two symmetrical fixing plates 21. The front side wall of the front fixing plate 21 is fixedly connected to a motor 22. The opposite sides of the front and rear fixing plates 21 are rotatably connected to a worm gear 23. The output end of the motor 22 passes through the rear side wall of the front fixing plate 21 and is fixedly connected to the worm gear 23. The bottom of the worm gear 23 is meshed with two symmetrical worm wheels 24. The left ends of the two bidirectional screws 25 pass through the left side wall of the left side plate 20 and are fixedly connected to the two worm wheels 24 respectively.
[0026] like Figure 3 , Figure 4 As shown, the outer walls of the two bidirectional screws 25 are threaded with two symmetrical movable seats 26. The tops of the two movable seats 26 are fixedly connected with two symmetrical fixed posts 27. The tops of the two fixed posts 27 are fixedly connected with limit frames 28. The central controller 14 is electrically connected to the motor 22.
[0027] First, the crane component to be inspected is placed on the base 10 and positioned between the two limiting frames 28 of the clamping assembly 2. The central controller 14 starts the motor 22, which drives the worm gear 23 to rotate. Due to the meshing transmission between the worm gear 23 and the worm wheel 24, the bidirectional screw 25, which is fixedly connected to the worm wheel 24, rotates. The two movable seats 26 on the bidirectional screw 25 move relative to each other or towards each other due to the threaded connection, thereby driving the fixed column 27 and the limiting frame 28 fixed on the movable seat 26 to move, thus achieving the initial clamping and positioning of the crane component. Through the clamping assembly 2, the two movable seats 26 can move towards each other or away from each other, thereby adapting to crane components of different widths. Whether it is a narrow small connecting part or a wide large structural part, it can be effectively clamped. This flexibility greatly improves the compatibility of the inspection equipment with different components and reduces the trouble of replacing or adjusting the equipment due to changes in component size.
[0028] like Figure 5 , Figure 6 As shown, the adaptive fixing component 3 includes a top plate 32. The top of the top plate 32 is fixedly connected to the inner top wall of the limiting frame 28. A pressure sensor 31 is fixedly connected to the inner bottom wall of the limiting frame 28. Two connecting rods 33 are rotatably connected to the bottom of the top plate 32. A fixing block 34 is rotatably connected to the end of each connecting rod 33 away from the top plate 32. A connecting rod 36 is rotatably connected to the bottom of each fixing block 34. The ends of the two connecting rods 36, which are symmetrically arranged and close to each other, are rotatably connected to... The base plate 38 has a limit plate 39 fixedly connected to its bottom. A servo motor 35 is fixedly connected to the rear side wall of the rear fixing block 34. The output end of the servo motor 35 passes through the front side wall of the rear fixing block 34 and is fixedly connected to a screw 37. The front end of the screw 37 passes through the front side wall of the front fixing block 34 and is fixedly connected to a limit block. The interior of the front fixing block 34 is threadedly connected to the outer wall of the screw 37 through a threaded hole. The central controller 14 is electrically connected to the servo motor 35 and the pressure sensor 31.
[0029] Next, the central controller 14 controls the servo motor 35 in the adaptive fixing assembly 3 to start. The servo motor 35 drives the screw 37 to rotate. Due to the threaded connection between the front fixing block 34 and the screw 37, as well as the linkage transmission of connecting rod 1 33 and connecting rod 2 36, the limiting pressure plate 39 on the base plate 38 adjusts its position and applies pressure to the crane component. During this process, pressure sensor 2 31 monitors the pressure value in real time and feeds the data back to the central controller 14. When the pressure reaches the preset value, the central controller 14 controls the servo motor 35 to stop rotating, completing the stable fixing of the crane component. Through the adaptive fixing assembly 3, pressure sensor 2 31 can monitor pressure changes in real time and dynamically adjust the fixing pressure by adjusting the servo motor 35 to maintain the stable fixing of the component. This dynamic stabilization function is like an automatic balancing system, which can effectively deal with various interference factors in the detection process and ensure that the component is always in an ideal fixed state, thereby ensuring the stability and reliability of the detection data.
[0030] Then, the central controller 14 controls the cylinder 15 to work. The output end of the cylinder 15 pushes the pressure plate 16 to move downward, applying downward pressure to the fixed crane component. At this time, the pressure sensor 17 monitors the magnitude of the pressure applied by the pressure plate 16 and transmits it to the central controller 14. At the same time, the ultrasonic sensor 19 located in the rectangular groove 18 of the base 10 starts to work. It emits ultrasonic waves and receives reflected waves. By measuring the change in the propagation time of the ultrasonic waves, it detects the minute deformation data generated by the crane component when it is under force. This deformation data is also transmitted to the central controller 14.
[0031] Finally, the central controller 14 calculates the stiffness value of the crane component based on the pressure data received from the pressure sensor 17 and the deformation data from the ultrasonic sensor 19, using a specific stiffness calculation algorithm, thereby completing the stiffness detection of the crane component. Throughout the process, the central controller 14 plays a core role in coordinating and controlling various electrical components as well as data processing and analysis. The components cooperate with each other to achieve accurate stiffness detection.
[0032] The working principle of the crane stiffness testing equipment will be explained in detail below.
[0033] like Figure 1-6As shown, firstly, the crane component to be tested is placed on the base 10 and positioned between the two limiting frames 28 of the clamping assembly 2. The central controller 14 starts the motor 22, which drives the worm gear 23 to rotate. Due to the meshing transmission between the worm gear 23 and the worm wheel 24, the bidirectional screw 25, which is fixedly connected to the worm wheel 24, rotates. The two movable seats 26 on the bidirectional screw 25 move relative to each other or towards each other due to the threaded connection, thereby driving the fixed column 27 and the limiting frame 28 fixed on the movable seat 26 to move, thus achieving the initial clamping and positioning of the crane component. Through the clamping assembly 2, the two movable seats 26 can move towards each other or away from each other, thereby adapting to crane components of different widths. Whether it is a narrow small connecting part or a wide large structural part, it can be effectively clamped. This flexibility greatly improves the compatibility of the testing equipment with different components and reduces the trouble of replacing or adjusting the equipment due to changes in component size.
[0034] Next, the central controller 14 controls the servo motor 35 in the adaptive fixing assembly 3 to start. The servo motor 35 drives the screw 37 to rotate. Due to the threaded connection between the front fixing block 34 and the screw 37, as well as the linkage transmission of connecting rod 1 33 and connecting rod 2 36, the limiting pressure plate 39 on the base plate 38 adjusts its position and applies pressure to the crane component. During this process, pressure sensor 2 31 monitors the pressure value in real time and feeds the data back to the central controller 14. When the pressure reaches the preset value, the central controller 14 controls the servo motor 35 to stop rotating, completing the stable fixing of the crane component. Through the adaptive fixing assembly 3, pressure sensor 2 31 can monitor pressure changes in real time and dynamically adjust the fixing pressure by adjusting the servo motor 35 to maintain the stable fixing of the component. This dynamic stabilization function is like an automatic balancing system, which can effectively deal with various interference factors in the detection process and ensure that the component is always in an ideal fixed state, thereby ensuring the stability and reliability of the detection data.
[0035] Then, the central controller 14 controls the cylinder 15 to work. The output end of the cylinder 15 pushes the pressure plate 16 to move downward, applying downward pressure to the fixed crane component. At this time, the pressure sensor 17 monitors the magnitude of the pressure applied by the pressure plate 16 and transmits it to the central controller 14. At the same time, the ultrasonic sensor 19 located in the rectangular groove 18 of the base 10 starts to work. It emits ultrasonic waves and receives reflected waves. By measuring the change in the propagation time of the ultrasonic waves, it detects the minute deformation data generated by the crane component when it is under force. This deformation data is also transmitted to the central controller 14.
[0036] Finally, the central controller 14 calculates the stiffness value of the crane component based on the pressure data received from the pressure sensor 17 and the deformation data from the ultrasonic sensor 19, using a specific stiffness calculation algorithm, thereby completing the stiffness detection of the crane component. Throughout the process, the central controller 14 plays a core role in coordinating and controlling various electrical components as well as data processing and analysis. The components cooperate with each other to achieve accurate stiffness detection.
[0037] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.
Claims
1. A stiffness testing device for a crane, comprising a base (10), characterized in that: A fixing frame (11) is fixedly connected to the top of the base (10). Self-locking casters (12) are fixedly connected to the four corners of the bottom of the base (10). An L-shaped fixing plate (13) is fixedly connected to the middle of the front side of the base (10). A central controller (14) is fixedly connected to the front side wall of the L-shaped fixing plate (13). A cylinder (15) is fixedly connected to the top of the fixing frame (11). The output end of the cylinder (15) extends into the interior of the fixing frame (11) and is fixedly connected to a pressure plate (16). The outer wall of the output shaft of the cylinder (15) is slidably connected to the fixed frame (11). A pressure sensor (17) is fixedly connected to the bottom of the pressure plate (16). A rectangular groove (18) with a front-to-back orientation is opened in the middle of the top of the base (10). Several ultrasonic sensors (19) are fixedly connected inside the rectangular groove (18). A clamping assembly (2) is provided on the top of the base (10). Two left-right symmetrical self-adaptive fixing assemblies (3) are provided inside the clamping assembly (2).
2. The stiffness testing equipment for a crane according to claim 1, characterized in that: The central controller (14) is electrically connected to the cylinder (15), pressure sensor (17), and several ultrasonic sensors (19).
3. The stiffness testing equipment for a crane according to claim 1, characterized in that: The clamping assembly (2) includes two side plates (20). The bottom of the two side plates (20) is fixedly connected to the top of the base (10). Both the front and rear sides of the two side plates (20) are rotatably connected to bidirectional screws (25). The left side wall of the left side plate (20) is fixedly connected to two symmetrical fixing plates (21). The front side wall of the front fixing plate (21) is fixedly connected to a motor (22). The opposite surfaces of the two fixing plates (21) are rotatably connected to a worm gear (23). The output end of the motor (22) passes through the rear side wall of the front fixing plate (21) and is fixedly connected to the worm gear (23). The bottom of the worm gear (23) is meshed with two symmetrical worm wheels (24). The left ends of the two bidirectional screws (25) pass through the left side wall of the left side plate (20) and are fixedly connected to the two worm wheels (24) respectively.
4. The stiffness testing equipment for a crane according to claim 3, characterized in that: The outer walls of the two bidirectional screws (25) are threaded with two symmetrical movable seats (26). The tops of the two movable seats (26) are fixedly connected with two symmetrical fixed posts (27). The tops of the two fixed posts (27) are fixedly connected with limit frames (28). The central controller (14) is electrically connected to the motor (22).
5. The stiffness testing equipment for a crane according to claim 4, characterized in that: The adaptive fixing component (3) includes a top plate (32). The top of the top plate (32) is fixedly connected to the inner top wall of the limiting frame (28). A pressure sensor (31) is fixedly connected to the inner bottom wall of the limiting frame (28). Two connecting rods (33) are rotatably connected to the bottom of the top plate (32). A fixing block (34) is rotatably connected to the end of each of the two connecting rods (33) away from the top plate (32). A connecting rod (36) is rotatably connected to the bottom of each of the two fixing blocks (34). A bottom plate is rotatably connected to the end of each of the two connecting rods (36) that are symmetrically arranged and close to each other. The bottom of the base plate (38) is fixedly connected to a limiting pressure plate (39). The rear side wall of the rear fixing block (34) is fixedly connected to a servo motor (35). The output end of the servo motor (35) passes through the front side wall of the rear fixing block (34) and is fixedly connected to a screw (37). The front end of the screw (37) passes through the front side wall of the front fixing block (34) and is fixedly connected to a limiting block. The interior of the front fixing block (34) is threadedly connected to the outer wall of the screw (37) through a threaded hole. The central controller (14) is electrically connected to the servo motor (35) and the pressure sensor (31) respectively.