Crane trolley with stroke calibration function

Abstract

The utility model discloses a crane trolley with a stroke calibration function, which belongs to the technical field of cranes and comprises a traveling mechanism and two track assemblies, the two track assemblies are arranged on the upper portions of two sides of a working space along the front-back direction, and rollers are arranged at two ends of the traveling mechanism. And rollers at two ends of the walking mechanism are respectively matched with the corresponding track assemblies. During normal use, when the crane trolley moves back and forth through the walking mechanism and passes through the feedback assembly, the position sensor on the walking mechanism generates a position signal A under the feedback of the feedback assembly, and the position signal A is input into the central processing unit; the central processing unit compares the position signal A with an instantaneous position signal B of the crane trolley generated by the absolute value encoder, and corrects the position signal B to be consistent with the position signal A; the position of the crane trolley is repeatedly calibrated in the working process, and the problem that the position signal B has an error due to the fact that the rollers slip is avoided.

Description

A crane trolley with stroke calibration function Technical Field

[0001] This utility model belongs to the technical field of cranes, and in particular relates to a crane trolley with a stroke calibration function. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. Generally, two longitudinal rails are fixed on both sides above the workspace, and the crane trolley is set on the two rails and can move back and forth.

[0003] Currently, automated cranes have become commonplace. In certain specialized industries that require precise positioning, high demands are placed on the accuracy of the crane trolley's travel position. The travel position information of intelligent crane trolleys is largely obtained by absolute encoders. The absolute encoder is installed on the side of the roller, and the rotation of the roller drives the input shaft of the absolute encoder to rotate to read the position. Since the distance the crane trolley moves when the roller rotates once is fixed, the distance the crane trolley moves can be calculated by the number of rotations of the absolute encoder's input shaft, thereby achieving precise positioning of the crane trolley.

[0004] During long-term operation, issues such as loose fasteners and wheel slippage may occur, leading to errors in travel information. This can prevent the intelligent crane trolley from maintaining continuous and stable production for extended periods. When the travel error of the crane trolley is significant, it is necessary to stop the machine for position calibration. The conventional method is to assign encoder pulses to travel limit switches to achieve position calibration. However, the travel limit switch has a large error, resulting in significant deviations in calibration values ​​in practical applications. Position errors are not detected promptly, and the equipment operates with erroneous data, failing to meet the high-precision positioning requirements of intelligent crane trolleys in actual use. Summary of the Invention

[0005] The purpose of this invention is to provide a crane trolley with a stroke calibration function, which can simultaneously calibrate the position during crane trolley operation, effectively solving the problem of large errors in the stroke of crane trolley after long-term use in the prior art.

[0006] This utility model adopts the following technical solution: A crane trolley with stroke calibration function includes a traveling mechanism and a track assembly. Two track assemblies are arranged on the upper part of both sides of the workspace in the front-back direction. Rollers are provided at both ends of the traveling mechanism, and the rollers at both ends of the traveling mechanism cooperate with the corresponding track assemblies, so that the traveling mechanism rolls on the corresponding track assemblies through the rollers. A power motor is provided on the traveling mechanism, and the output shaft of the power motor is fixedly set to the corresponding roller. An absolute encoder is also fixedly set on the traveling mechanism, and the input shaft of the absolute encoder is connected to the corresponding roller. When the roller rotates, it drives the input shaft of the absolute encoder to rotate synchronously. The absolute encoder transmits the number of rotations of the absolute encoder input shaft to the central processing unit. The central processing unit calculates the distance the traveling mechanism moves forward and backward based on the number of rotations of the absolute encoder input shaft.

[0007] Furthermore, the walking mechanism is also equipped with a position sensor, and the track assembly is equipped with a feedback component corresponding to the position sensor.

[0008] Furthermore, the walking mechanism includes two mutually fixed moving blocks, each with several rollers on its lower end face; a position sensor is fixedly mounted on the right moving block, and a feedback mechanism is mounted on the right track assembly.

[0009] Furthermore, the position sensor includes an infrared emitting tube and an infrared receiving tube. The infrared emitting tube is fixedly mounted on the bearing seat, which is fixedly mounted on the moving block on the right side. The infrared receiving tube is fixedly mounted on the L-plate, which is fixedly mounted to the bearing seat. The infrared emitting tube and the infrared receiving tube are on the same horizontal plane, and the position sensor is in normally open mode.

[0010] Furthermore, the track assembly includes a guide rail and a side plate. A base plate is fixedly installed on the lower end face of the guide rail, and the outer side face of the base plate is fixedly installed with the side plate. The feedback mechanism includes a blocking rod fixedly installed on the right side plate, and a vertical plate is fixedly installed on the outer end of the blocking rod along the vertical direction.

[0011] Furthermore, a rangefinder is fixedly installed at both the front and rear ends of the right side panel, and a blocking rod is slidably installed on the right side panel in the front-back direction. The blocking rod is internally threaded with a threaded rod, which is rotatably connected to the right side panel.

[0012] Furthermore, the shielding rod includes a slide rod that is slidably connected to the right side plate in the front-back direction. A crossbar is fixedly installed on the upper end face of the slide rod by an adjusting bolt. A vertical plate is fixedly installed on the outer end of the crossbar. The slide rod is threadedly connected to a threaded rod. An adjusting slot is opened on the upper end face of the crossbar in the left-right direction. An adjusting bolt passes through the adjusting slot and is threadedly connected to the slide rod. The adjusting bolt fixes the crossbar to the top of the slide rod.

[0013] Furthermore, two protective plates are fixedly installed on the inner bottom wall of the L-plate, and the outer surfaces of the infrared emitting tube and the infrared receiving tube are respectively fixedly installed with the corresponding protective plates, and the ends of the infrared emitting tube and the infrared receiving tube are flush with the inner side of the protective plate.

[0014] Furthermore, a vertical rod is rotatably connected to the right side plate. The vertical rod is set in the vertical direction, and a first bevel gear is fixedly set at the bottom end of the vertical rod. A second bevel gear is fixedly set at the end of the threaded rod, and the first bevel gear and the second bevel gear mesh with each other.

[0015] Furthermore, two power motors are fixedly mounted on the inner side of their respective moving blocks, and a reduction gearbox is provided between the power motors and the moving blocks. The input shaft of the power motor is fixedly mounted to the input shaft of the reduction gearbox, and the output shaft of the reduction gearbox is fixedly mounted to the corresponding roller. A support plate is fixedly mounted on the inner side of each moving block, and the power motor and the reduction gearbox are fixedly mounted on the corresponding support plate. An absolute encoder is fixedly mounted on the corresponding support plate, and the input shaft of the absolute encoder is fixedly mounted to the output shaft of the corresponding reduction gearbox.

[0016] I. This utility model, by setting up a traveling mechanism, rollers, an absolute encoder, a position sensor, and a feedback component, allows the crane trolley to generate a position signal A when it moves back and forth through the feedback component during normal use. Position signal A is input to the central processing unit (CPU), which compares it with the instantaneous position signal B of the crane trolley generated by the absolute encoder. If position signal B is inconsistent with position signal A, the CPU corrects position signal B to match position signal A. This ensures that the crane trolley undergoes repeated position calibration during operation, avoiding errors in position signal B caused by roller slippage.

[0017] II. This utility model, by setting up an infrared emitting tube, an infrared receiving tube, and a blocking rod, allows the infrared emitting tube and the infrared receiving tube to move back and forth during normal use as the crane trolley moves. When the infrared emitting tube and the infrared receiving tube move to the blocking rod, the vertical plate of the blocking rod is positioned between the infrared emitting tube and the infrared receiving tube, blocking the infrared rays emitted by the emitting tube and preventing the infrared receiving tube from receiving infrared rays. At this time, the position sensor changes from a normally open state to a closed state, generating a position signal A. The central processing unit compares position signal A with position signal B. If there is an error between position signal B and position signal A, the central processing unit corrects position signal B to match position signal A, thus achieving the purpose of correcting position signal B. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 shows the magnified osmotic pressure of the structure at point A in Figure 1 of this utility model;

[0020] Figure 3 is a front view of the structure of this utility model;

[0021] Figure 4 is an enlarged schematic diagram of the structure at point B in Figure 3 of this utility model.

[0022] Figure 5 is a three-dimensional structural diagram of the side plate in this utility model;

[0023] Figure 6 is an enlarged schematic diagram of the structure at point C in Figure 5 of this utility model;

[0024] Figure 7 shows the osmotic pressure of the three-dimensional structure of the power motor in this utility model;

[0025] Figure 8 is an enlarged schematic diagram of the structure at point D in Figure 7 of this utility model;

[0026] Figure 9 is an enlarged schematic diagram of the structure at point E in Figure 7 of this utility model.

[0027] In the diagram, 1. Walking mechanism; 2. Track assembly; 3. Roller; 4. Winch; 5. Lifting motor; 6. Steel wire rope; 7. Hook assembly; 8. Power motor; 9. Absolute encoder; 10. Absolute encoder input shaft; 11. Moving block; 12. Bearing housing; 13. Infrared emitting tube; 14. Infrared receiving tube; 15. L-plate; 16. Guide rail; 17. Side plate; 18. Base plate; 19. Blocking rod; 20. Vertical plate; 21. Rangefinder; 22. Threaded rod; 23. Sliding rod; 24. Adjusting bolt; 25. Horizontal bar; 26. Adjusting slot; 27. Vertical bar; 28. First bevel gear; 29. ​​Second bevel gear; 30. Inclined surface; 31. Platform; 32. Receiving slot; 33. Fixing plate; 34. Test plate; 35. Support block; 36. Protective plate; 37. Reduction gearbox; 38. Support plate; 39. Clamp; 40. Base; 41. Coupling. Detailed Implementation

[0028] Please refer to Figures 1-9. The present invention will be described in detail below with reference to the accompanying drawings and embodiments:

[0029] The crane trolley with stroke calibration function described in this utility model includes a traveling mechanism 1 and two track assemblies 2. The two track assemblies 2 are arranged along the front-to-back direction on the upper part of both sides of the workspace. Rollers 3 are provided at both ends of the traveling mechanism 1, and the rollers 3 at both ends of the traveling mechanism 1 respectively cooperate with the corresponding track assemblies 2, allowing the traveling mechanism 1 to roll on the corresponding track assemblies 2 via the rollers 3, thus achieving the purpose of forward and backward movement of the traveling mechanism 1 above the workspace. A winch 4 and a lifting motor 5 are provided on the traveling mechanism 1. A wire rope 6 is wound on the winch 4, and a hook assembly 7 is provided at the free end of the wire rope 6. The lifting motor 5 drives the winch 4 to rotate, releasing and winding the wire rope 6, thus achieving the purpose of lifting the hook assembly 7. A power motor 8 is provided on the traveling mechanism 1, and the output shaft of the power motor 8 is fixedly installed with the corresponding roller 3, enabling the power motor 8 to drive the roller... The rotation of wheel 3 enables the traveling mechanism 1 to move back and forth on the track assembly 2. An absolute encoder 9 is also fixedly installed on the traveling mechanism 1. The input shaft 10 of the absolute encoder is connected to the corresponding roller 3. When the roller 3 rotates, it drives the input shaft 10 of the absolute encoder to rotate, so that the absolute encoder 9 counts the number of rotations of the input shaft 10. The distance that the traveling mechanism 1 moves back and forth in one rotation of the roller 3 is fixed, so the forward and backward movement distance of the traveling mechanism 1 can be calculated by counting the number of rotations. The absolute encoder 9 transmits the number of rotations of the input shaft 10 to the central processing unit. The central processing unit calculates the forward and backward movement distance of the traveling mechanism 1 by counting the number of rotations of the input shaft 10, and then realizes the real-time positioning of the crane trolley through the absolute encoder 9, thus achieving the purpose of precise positioning of the crane trolley.

[0030] In practical use, loosening of the fixing bolts of the absolute encoder 9 or slippage of the roller 3 on the track assembly 2 can cause errors in the travel information, leading to positioning errors of the crane trolley. The crane trolley's position needs to be recalibrated before it can be used again. Therefore, the crane trolley's position needs to be calibrated periodically, or when positioning errors cause operational problems. To solve this problem, in this embodiment, a position sensor is also provided on the traveling mechanism 1, and a feedback component corresponding to the position sensor is provided on the track assembly 2. During normal use, when the crane trolley moves back and forth through the travel mechanism 1 and passes the feedback component, the position sensor on the travel mechanism 1 receives feedback from the feedback component and generates a position signal A. Position signal A is input to the central processing unit (CPU), which compares position signal A with the instantaneous position signal B of the crane trolley generated by the absolute encoder 9. When position signal B is inconsistent with position signal A, the CPU corrects position signal B to be consistent with position signal A. This allows the crane trolley to repeatedly undergo position calibration during operation, avoiding errors in position signal B caused by roller 3 slippage.

[0031] In this embodiment, the traveling mechanism 1 includes two mutually fixed moving blocks 11, and each moving block 11 has several rollers 3 on its lower end face; the left end of the winch 4 is rotatably connected to the left moving block 11, and the right end of the winch 4 is rotatably connected to the right moving block 11 through a bearing seat 12; the position sensor is fixedly mounted on the right moving block 11, and the feedback mechanism is mounted on the right track assembly 2; in use, the power motor 8 drives the corresponding rollers 3 to rotate, thereby driving the two moving blocks 11 to move back and forth on the corresponding track assembly 2, so as to achieve the purpose of driving the crane trolley to move back and forth. When the right moving block 11 drives the position sensor to move past the feedback mechanism, the position sensor receives feedback from the feedback mechanism and generates a position signal A. The central processing unit compares the position signal A with the position signal B, and the central processing unit corrects the position signal B to be consistent with the position signal A.

[0032] In this embodiment, the position sensor includes an infrared emitting tube 13 and an infrared receiving tube 14. The infrared emitting tube 13 is fixedly mounted on the bearing seat 12, and the infrared receiving tube 14 is fixedly mounted on the L-plate 15. The L-plate 15 is fixedly mounted to the bearing seat 12. The infrared emitting tube 13 and the infrared receiving tube 14 are on the same horizontal plane. The position sensor is in normally open mode. The infrared receiving tube 14 emits infrared rays and receives the infrared rays emitted by the infrared emitting tube 13. At this time, the position sensor is in a normally open state. When the crane trolley moves back and forth, it causes the moving block 11 to move back and forth. The moving block 11 on the right side drives the infrared emitting tube 14 to move forward and backward. The infrared emitting tube 13 and the infrared receiving tube 14 move back and forth. When the infrared emitting tube 13 and the infrared receiving tube 14 move to the feedback mechanism, the feedback mechanism blocks the space between the infrared emitting tube 13 and the infrared receiving tube 14, so that the infrared light emitted by the infrared emitting tube 13 is blocked, and thus the infrared receiving tube 14 cannot receive the infrared light. At this time, the position sensor changes from the normally open state to the closed state, and the position sensor generates signal A. The central processing unit compares the position signal A with the position signal B, and then the central processing unit corrects the position signal B to be consistent with the position signal A, thereby achieving the purpose of correcting the position signal B.

[0033] In this embodiment, the track assembly 2 includes a guide rail 16 and a side plate 17. A base plate 18 is fixedly installed on the lower end face of the guide rail 16. The outer side of the base plate 18 is fixedly installed with the side plate 17. The side plate 17 is fixedly installed on the upper part of both sides of the workspace. The workspace is determined by the on-site work site, such as a workshop. The side plate 17 is fixed above both sides of the workshop, so that the crane trolley can move back and forth on the guide rail 16, and the crane trolley can move back and forth above the workshop. After the crane trolley lifts the material, it moves back and forth to transport the material to the designated location in the workshop.

[0034] In this embodiment, the feedback mechanism includes a blocking rod 19 fixedly mounted on the right side plate 17, and a vertical plate 20 fixedly mounted on the outer end of the blocking rod 19 along the vertical direction. When the crane trolley moves back and forth, causing the right side moving block 11 to move back and forth, the right side moving block 11 drives the infrared emitting tube 13 and the infrared receiving tube 14 to move back and forth. When the infrared emitting tube 13 and the infrared receiving tube 14 move to the blocking rod 19, the vertical plate 20 of the blocking rod 19 is located between the infrared emitting tube 13 and the infrared receiving tube 14, so that the infrared light emitted by the infrared emitting tube 13 is blocked by the vertical plate 20, so that the infrared receiving tube 14 cannot receive the infrared light. At this time, the position sensor changes from the normally open state to the closed state. At this time, the position sensor generates a position signal A. The central processing unit compares the position signal A with the position signal B. If the position signal B has an error with the position signal A, the central processing unit corrects the position signal B to be consistent with the position signal A, thereby achieving the purpose of correcting the position signal B.

[0035] The position of the blocking rod 19 relative to the side plate 17 is the zero point position. When the crane trolley moves to this position, the position of the crane trolley is at the zero point. When the crane trolley moves back and forth on the guide rail 16 via the roller 3, the absolute encoder input shaft 10 rotates synchronously with the roller 3. The central processing unit processes the rotation number signal of the absolute encoder input shaft 10 to calculate the distance the crane trolley moves and generates the instantaneous position signal B of the crane trolley. When the crane trolley moves to the zero point position, the position sensor generates signal A. If the position signal B at this time has an error with the position signal A, it means that the position signal B does not represent the zero point position at this time. The central processing unit needs to correct the position signal B to be consistent with the position signal A, that is, correct the position signal B to the zero point position.

[0036] In this embodiment, rangefinders 21 are fixedly installed at both the front and rear ends of the right side plate 17. A blocking rod 19 is slidably mounted on the right side plate 17 along the front-rear direction. A threaded rod 22 is internally threaded onto the blocking rod 19, and the threaded rod 22 is rotatably connected to the right side plate 17. The rangefinders 21 are infrared rangefinders. By rotating the threaded rod 22, the blocking rod 19 can be moved back and forth. Simultaneously, the rangefinders 21 emit infrared light that illuminates the blocking rod 19. Both rangefinders 21 display distance data, allowing for the setting of two rangefinders 21. When the data values ​​of 1 are equal, the position of the blocking rod 19 is the zero point position, which is also the zero point position of the crane trolley. During initial debugging or when the blocking rod 19 is replaced during use, the position of the blocking rod 19 needs to be recalibrated. The position of the blocking rod 19 is determined by the data values ​​of the two rangefinders 21. By rotating the threaded rod 22, the blocking rod 19 is moved back and forth on the right side plate 17. When the distance values ​​of the two rangefinders 21 are equal, stop rotating the threaded rod 22. At this time, the blocking rod 19 is located at the defined zero point position.

[0037] In practical use, collisions with the shielding rod 19 often occur, causing deformation and requiring manual repair to correct its shape. Sometimes, the shielding rod 19 needs to be replaced. To facilitate replacement of the shielding rod 19 and adjustment of its left and right position, in this embodiment, the shielding rod 19 includes a sliding rod 23 that is slidably connected to the right side plate 17 in the front-back direction. A horizontal rod 25 is fixedly mounted on the upper end face of the sliding rod 23 by an adjusting bolt 24, and a vertical plate 20 is fixedly mounted on the outer end of the horizontal rod 25. The sliding rod 23 is threadedly connected to a threaded rod 22. An adjusting groove 26 is formed on the upper end face of the horizontal rod 25 in the left-right direction. Bolt 24 passes through adjusting groove 26 and is threaded to slide bar 23. Adjusting bolt 24 fixes crossbar 25 to the top of slide bar 23. At the same time, the crane trolley is moved to the zero position. By loosening adjusting bolt 24, crossbar 25 can be moved left and right so that vertical plate 20 is located between infrared emitting tube 13 and infrared receiving tube 14. Then tighten adjusting bolt 24 to fix the position of crossbar 25. During use, if vertical plate 20 is hit and crossbar 25 is deformed, the shape of vertical plate 20 and crossbar 25 can be manually corrected and they can continue to be used. Alternatively, crossbar 25 and vertical plate 20 can be replaced. Crossbar 25 can be disassembled by removing adjusting bolt 24, which is convenient for disassembly and installation.

[0038] When the vertical plate 20 is impacted during use, it typically collides with the infrared emitting tube 13 and the infrared receiving tube 14. To protect the infrared emitting tube 13 and the infrared receiving tube 14, in this embodiment, two protective plates 36 are fixedly installed on the inner bottom wall of the L plate 15. The outer surfaces of the infrared emitting tube 13 and the infrared receiving tube 14 are respectively fixedly installed with the corresponding protective plates 36. The ends of the infrared emitting tube 13 and the infrared receiving tube 14 are flush with the inner side of the protective plates 36. When the vertical plate 20 is impacted, it collides with the corresponding protective plates 36 instead of directly colliding with the infrared emitting tube 13 and the infrared receiving tube 14, thus preventing the infrared emitting tube 13 and the infrared receiving tube 14 from being damaged.

[0039] In this embodiment, a vertical rod 27 is rotatably connected to the right side plate 17. The vertical rod 27 is arranged in the vertical direction. A first bevel gear 28 is fixedly arranged at the bottom end of the vertical rod 27, and a second bevel gear 29 is fixedly arranged at the end of the threaded rod 22. The first bevel gear 28 and the second bevel gear 29 mesh with each other. By rotating the vertical rod 27, the vertical rod 27 drives the threaded rod 22 to rotate through the first bevel gear 28 and the second bevel gear 29, thereby achieving the purpose of rotating the threaded rod 22.

[0040] In this embodiment, the inner surface of the right side plate 17 is a slope 30. A platform 31 and two receiving grooves 32 are provided on the slope 30 of the right side plate 17. The sliding rod 23 is slidably disposed on the platform 31 of the right side plate 17 in the front-back direction. Both ends of the threaded rod 22 are rotatably connected to the right side plate 17 and extend into the corresponding receiving grooves 32. Two fixing plates 33 are rotatably connected to the outer surface of the vertical rod 27. Each fixing plate 33 is fixedly disposed to the right side plate 17. The infrared rays emitted by the two rangefinders 21 pass between the vertical rod 27 and the right side plate 17 and are projected onto the side of the horizontal rod 25 to achieve the purpose of testing the distance of the horizontal rod 25. The two rangefinders 21 test the distance of the horizontal rod 25 at the same time. When the values ​​of the two rangefinders 21 are the same, it means that the horizontal rod 25 is at the zero point position. At this time, the blocking rod 19 is also at the zero point position.

[0041] In this embodiment, the front and rear sides of the crossbar 25 are fixedly mounted on the test plate 34, and the infrared rays emitted by the two rangefinders 21 are projected onto the test plate 34.

[0042] In this embodiment, a support block 35 is fixedly provided on the left side of the slide bar 23. A threaded hole is provided on the upper end face of the support block 35. Two adjusting bolts 24 can be used to fix the crossbar 25. One adjusting bolt 24 passes through the adjusting groove 26 and is threadedly connected to the slide bar 23. The other adjusting bolt 24 passes through the adjusting groove 26 and is threadedly connected to the threaded hole of the support block 35.

[0043] In this embodiment, two power motors 8 are fixedly installed inside the corresponding moving blocks 11. A reduction gearbox 37 is provided between the power motors 8 and the moving blocks 11. The input shaft of the power motor 8 is fixedly installed with the input shaft of the reduction gearbox 37. The output shaft of the reduction gearbox 37 is fixedly installed with the corresponding roller 3. When the power motor 8 is started, it drives the corresponding roller 3 to roll on the guide rail 16 through the reduction gearbox 37, thereby achieving the purpose of driving the moving blocks 11 to move back and forth.

[0044] In this embodiment, a support plate 38 is fixedly provided on the inner side of each moving block 11. The power motor 8 and the reduction gearbox 37 are fixedly provided on the corresponding support plate 38. The absolute encoder 9 is fixedly provided on the corresponding support plate 38. The input shaft 10 of the absolute encoder is fixedly provided with the output shaft of the corresponding reduction gearbox 37. In use, the rotation of the power motor 8 drives the output shaft of the reduction gearbox 37 to rotate through the input shaft of the reduction gearbox 37. The output shaft of the reduction gearbox 37 drives the corresponding roller 3 to roll. At the same time, the output shaft of the reduction gearbox 37 drives the input shaft 10 of the absolute encoder to rotate, so that the input shaft 10 of the absolute encoder and the roller 3 rotate synchronously and at the same speed, so that the number of rotations of the input shaft 10 of the absolute encoder is the same as the number of rotations of the roller 3. The central processing unit processes the rotation number signal of the input shaft 10 of the absolute encoder to calculate the distance moved by the crane trolley and generates the instantaneous position signal B of the crane trolley.

[0045] In this embodiment, the absolute encoder 9 is fixed to the base 40 by two clamps 39, and the lower end face of the base 40 is fixedly set with the support plate 38; the absolute encoder 9 can be disassembled and installed by removing the clamps 39.

[0046] In this embodiment, the absolute encoder input shaft 10 and the output shaft of the reduction gearbox 37 are fixedly connected by a coupling 41; the rotation of the output shaft of the reduction gearbox 37 drives the absolute encoder input shaft 10 to rotate through the coupling 41.

[0047] The working principle of this utility model is as follows: The crane trolley moves back and forth on the guide rail 16 via the rollers 3. Simultaneously, the absolute encoder input shaft 10 rotates synchronously with the rollers 3, so that the number of rotations of the input shaft generated by the absolute encoder 9 is transmitted to the central processing unit. The central processing unit calculates the instantaneous position of the crane trolley's forward and backward movement based on the number of rotations of the input shaft of the absolute encoder 9, and generates a position signal B. The absolute encoder 9 can accurately locate the instantaneous position of the crane trolley. On the other hand, each time the crane trolley passes the feedback mechanism, the infrared emitting tube 13 and the infrared receiving tube 14 on the crane trolley are blocked once by the vertical plate 20 on the blocking rod 19. The position sensor changes from normally open to closed. At this time, the position sensor generates a position signal A. The central processing unit compares the position signal A with the position signal B. If there is an error between the position signal B and the position signal A, the central processing unit corrects the position signal B to be consistent with the position signal A, thereby achieving the purpose of correcting the position signal B.

Claims

1. A crane trolley with a travel calibration function, comprising a traveling mechanism (1) and a track assembly (2), characterized in that: Two track components (2) are arranged on the upper part of both sides of the workspace in the front-back direction. Rollers (3) are provided at both ends of the walking mechanism (1). The rollers (3) at both ends of the walking mechanism (1) cooperate with the corresponding track components (2) respectively, so that the walking mechanism (1) rolls on the corresponding track components (2) through the rollers (3). A power motor (8) is provided on the walking mechanism (1). The output shaft of the power motor (8) is fixedly set with the corresponding roller (3). An absolute encoder (9) is also fixedly set on the walking mechanism (1). The absolute encoder input shaft (10) is connected to the corresponding roller (3). When the roller (3) rotates, it drives the absolute encoder input shaft (10) to rotate synchronously. The absolute encoder (9) sends the number of rotations of the absolute encoder input shaft (10) to the central processing unit. The central processing unit calculates the distance that the walking mechanism (1) moves forward and backward based on the number of rotations of the absolute encoder input shaft (10). A position sensor is also provided on the walking mechanism (1). A feedback component corresponding to the position sensor is provided on the track component (2).

2. The crane trolley with stroke calibration function according to claim 1, characterized in that: The walking mechanism (1) includes two mutually fixed moving blocks (11), and each moving block (11) has several rollers (3) on its lower end face; the position sensor is fixedly mounted on the moving block (11) on the right side, and the feedback mechanism is mounted on the track assembly (2) on the right side.

3. The trolley of the crane with the travel calibration function according to claim 2, characterized in that: The position sensor includes an infrared emitting tube (13) and an infrared receiving tube (14). The infrared emitting tube (13) is fixedly mounted on the bearing seat (12), the bearing seat (12) is fixedly mounted on the right-side moving block (11), and the infrared receiving tube (14) is fixedly mounted on the L plate (15). The L plate (15) and the bearing seat (12) are fixedly mounted. The infrared emitting tube (13) and the infrared receiving tube (14) are on the same horizontal plane. The position sensor is in normally open mode.

4. The crane trolley with stroke calibration function according to claim 3, characterized in that: The track assembly (2) includes a guide rail (16) and a side plate (17). A base plate (18) is fixedly installed on the lower end face of the guide rail (16), and the outer side of the base plate (18) is fixedly installed with the side plate (17). The feedback mechanism includes a blocking rod (19) fixedly installed on the right side plate (17), and a vertical plate (20) is fixedly installed on the outer end of the blocking rod (19) along the vertical direction.

5. The trolley of the crane with the travel calibration function according to claim 4, characterized in that: Rangefinders (21) are fixedly installed at both ends of the right side plate (17). A blocking rod (19) is slidably installed on the right side plate (17) in the front-back direction. A threaded rod (22) is threadedly connected to the blocking rod (19). The threaded rod (22) is rotatably connected to the right side plate (17).

6. The trolley of the crane with the travel calibration function according to claim 5, characterized in that: The shielding rod (19) includes a sliding rod (23) that is slidably connected to the right side plate (17) in the front-back direction. A horizontal bar (25) is fixedly installed on the upper end surface of the sliding rod (23) by an adjusting bolt (24). A vertical plate (20) is fixedly installed on the outer end of the horizontal bar (25). The sliding rod (23) is threadedly connected to the threaded rod (22). An adjusting groove (26) is opened on the upper end surface of the horizontal bar (25) in the left-right direction. The adjusting bolt (24) passes through the adjusting groove (26) and is threadedly connected to the sliding rod (23). The adjusting bolt (24) fixes the horizontal bar (25) to the top of the sliding rod (23).

7. The trolley of the crane with the travel calibration function according to claim 3, characterized in that: Two protective plates (36) are fixedly installed on the inner bottom wall of the L plate (15). The outer surfaces of the infrared emitting tube (13) and the infrared receiving tube (14) are fixedly installed with the corresponding protective plates (36). The ends of the infrared emitting tube (13) and the infrared receiving tube (14) are flush with the inner side of the protective plate (36).

8. The crane trolley with stroke calibration function according to claim 5, characterized in that: A vertical rod (27) is rotatably connected to the side plate (17) on the right side. The vertical rod (27) is set in the vertical direction. A first bevel gear (28) is fixedly set at the bottom end of the vertical rod (27). A second bevel gear (29) is fixedly set at the end of the threaded rod (22). The first bevel gear (28) and the second bevel gear (29) mesh with each other.

9. The crane trolley with stroke calibration function according to claim 8, characterized in that: The inner side of the right side plate (17) is a slope (30). A platform (31) and two receiving slots (32) are provided on the slope (30) of the right side plate (17). The sliding rod (23) is slidably set on the platform (31) of the right side plate (17) in the front-back direction. Both ends of the threaded rod (22) are rotatably connected to the right side plate (17) and extend into the corresponding receiving slots (32). The outer surface of the vertical rod (27) is rotatably connected to two fixing plates (33). Each fixing plate (33) is fixedly set to the right side plate (17). The infrared rays emitted by the two rangefinders (21) pass between the vertical rod (27) and the right side plate (17) and are projected onto the side of the horizontal rod (25).

10. The crane trolley with stroke calibration function according to claim 3, characterized in that: Two power motors (8) are fixedly installed on the inner side of the corresponding moving blocks (11). A reduction gearbox (37) is provided between the power motors (8) and the moving blocks (11). The input shaft of the power motor (8) is fixedly installed with the input shaft of the reduction gearbox (37). The output shaft of the reduction gearbox (37) is fixedly installed with the corresponding roller (3). A support plate (38) is fixedly installed on the inner side of each moving block (11). The power motor (8) and the reduction gearbox (37) are fixedly installed on the corresponding support plate (38). An absolute encoder (9) is fixedly installed on the corresponding support plate (38). The input shaft (10) of the absolute encoder is fixedly installed with the output shaft of the corresponding reduction gearbox (37).

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