Non-camber deflection self-adaptive magnetic suspension bridge crane

Abstract

The camber-free deflection self-adaptive magnetic suspension bridge crane comprises a crane carriage which is arranged on a cart frame and can transversely move along cart main beams of the cart frame, and the crane carriage comprises two crane main beams parallel to the cart main beams; suspension air bags are fixedly arranged at the bottom ends of the trolley main beams, electromagnetic rotor assemblies are arranged at the bottom ends of the suspension air bags, each electromagnetic rotor assembly comprises a plurality of chain plates which are tightly arranged in the transverse direction and hinged to one another, and electromagnetic windings are arranged on the bottom faces of the chain plates; electromagnetic stator assemblies are arranged on the upper surfaces of the cart main beams; according to the invention, the crane carriage can smoothly pass through the downwarping position of the main beam of the crane carriage without resistance, the design concept that the main beam of the crane carriage adopts an upper camber structure to counteract downwarping deformation of the main beam of the crane carriage is canceled, and the design complexity and manufacturing cost of the crane are obviously reduced; and the running resistance of the crane carriage under the working conditions of no load, light load and heavy load is reduced, and the overall performance of the crane is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge crane technology, specifically to a deflection-adaptive magnetic levitation bridge crane without camber. Background Technology

[0002] The main beam of a bridge crane typically has a certain upward camber. This is primarily to counteract the downward deflection that may occur under rated load, thus preventing significant slope during trolley operation under heavy loads and reducing trolley running resistance. Given that bridge cranes mainly operate under heavy loads, and that their running resistance increases significantly compared to unloaded or lightly loaded conditions at the same slope, the upward camber setting in traditional designs is particularly necessary.

[0003] Currently, the setting of the camber is mainly based on industry experience formulas and analogical design methods, and its magnitude is affected by multiple factors such as materials, structural stiffness, and ambient temperature. Furthermore, during subsequent use, the camber of the main beam will gradually decrease with increasing service life due to factors such as overload operation, improper operation, and inadequate maintenance. The camber design of bridge cranes has always been a technical challenge in the crane manufacturing industry; therefore, the existence of camber not only increases manufacturing difficulty but also places higher demands on the long-term operation and maintenance of the crane. Even if the camber of the main beam is carefully maintained within a reasonable range during design and manufacturing, the trolley will still be affected by the slope caused by the camber when the bridge crane is running under no-load or light-load conditions, inevitably resulting in certain running resistance and other problems. Summary of the Invention

[0004] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a deflection-adaptive magnetic levitation bridge crane without camber. By adopting a magnetic levitation design structure, the crane trolley adaptively adjusts its levitation operation, ensuring that the trolley can smoothly and without resistance pass through the locations where the main beam of the crane deflects downwards. This eliminates the design concept of using an upward camber structure on the main beam to counteract downward deflection, significantly reducing the complexity of crane design and manufacturing costs, lowering maintenance and repair costs, and improving the crane's operating efficiency and stability. It also reduces the crane's dependence on materials, structural stiffness, and ambient temperature, while greatly reducing the trolley's running resistance under no-load, light-load, and heavy-load conditions, further enhancing the overall performance of the crane. The trolley exhibits good stability and high control precision during levitation operation, effectively reducing trolley running resistance, thereby reducing the crane's overall energy consumption and wear, extending the equipment's service life, and effectively solving the problems in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a non-arched, deflection-adaptive magnetic levitation bridge crane, comprising a crane trolley 4 mounted on a main trolley frame 1, which can move laterally along its main beam 11; a traction device 5 mounted on the main trolley frame 1 for traction of the crane trolley 4 laterally; characterized in that: the main beam 11 is a non-arched box girder structure; the crane trolley 4 includes two trolley main beams 41 arranged parallel to the main beam 11; each trolley main beam 41 has a fixed suspension airbag 6 at its bottom end, the bottom surface of which is adapted to its bottom shape; the bottom surface of the suspension airbag 6 is flat; an electromagnetic actuator assembly 7 is fitted to the bottom surface of the suspension airbag 6; the electromagnetic actuator assembly 7 includes several chain plates 71 arranged closely in a transverse direction; each chain plate 71 has an electromagnetic winding 72 on its bottom surface; adjacent chain plates 71 are connected by hinge pins 73. The electromagnetic windings 72 are hinged together and electrically connected to each other to form an electromagnetic moving chain. The upper surface of the main beam 11 of the trolley is provided with electromagnetic stator assemblies 2 with the same magnetic poles as the electromagnetic moving chain. The electromagnetic stator assembly 2 and the electromagnetic moving chain generate a repulsive force, which makes the suspension airbag 6 and the crane trolley 4 suspend on the main beam 11 of the trolley. The suspension airbag 6 is subjected to an upward force exerted on it by the electromagnetic moving chain and the weight of the crane trolley 4, which causes its top and bottom surfaces to come closer together and deform. Under normal conditions, the bottom surface of the suspension airbag 6 is flat. After the distance between the electromagnetic stator assembly 2 and the electromagnetic moving chain changes, the repulsive force between them changes. At this time, the bottom surface of the suspension airbag 6 bends and deforms with the change of the repulsive force between the electromagnetic stator assembly 2 and the electromagnetic moving chain, and the electromagnetic moving chain that is attached to the bottom surface of the suspension airbag 6 also bends and deforms.

[0006] Furthermore, the main trolley frame 1 includes two transversely arranged main trolley beams 11, with a main trolley end beam 12 fixed between both ends of the main trolley beam 11. Both sides of the bottom of the main trolley end beam 11 are provided with main trolley wheels 121, and a drive motor 122 that can drive the wheels of the main trolley 121 to rotate is also provided on the main trolley beam 11. Both ends of the trolley main beam 41 are provided with trolley end beams 42, and a hoisting winch 43 for lifting goods is provided between the trolley main beams 41.

[0007] Furthermore, each of the outer ends of the main beam of the trolley is fixedly provided with a trolley wing beam, and each outer end of the trolley wing beam is provided with a wing plate. The inner side of the wing plate is provided with a track support in the transverse direction, and the top and bottom surfaces of the track support are provided with slide rails. Each of the outer ends of the main beam of the trolley is provided with a trolley wing beam in the transverse direction, and each outer end of the trolley wing beam is provided with a trolley limiting pulley assembly. The trolley limiting pulley assembly includes a vertically provided limiting plate and a longitudinally provided limiting shaft on the trolley wing beam. The limiting plate has a vertically provided limiting groove, and the limiting shaft is vertically slidably fitted into the limiting groove. Both the upper and lower ends of the outer side of the limiting plate are provided with axles in the longitudinal direction, and each axle is provided with a limiting wheel that rotates on it. The limiting wheel is rotatably connected to the corresponding slide rail.

[0008] Furthermore, each of the chain plates has a receiving groove on its bottom surface, and the electromagnetic winding is fixedly nested in the receiving groove; a lower base and an upper base are respectively provided on both sides of the transverse end of the chain plate. The lower base has a pin hole in the longitudinal direction, and the pin hole is coaxially arranged with the corresponding hinge pin. A spline sleeve is provided on the outer end of the lower base corresponding to the pin hole, and a conductive ring with a spline hole in the inner hole is fitted on the outer circumferential wall of the spline sleeve. A laying groove is provided on the top wall of the lower base; the upper base is a Z-shaped plate structure. A second pin hole is provided in the longitudinal direction on the outer end plate of the upper base, and the second pin hole is coaxially arranged with the corresponding hinge pin. A laying groove is provided on the inner end of the outer end plate of the upper base corresponding to the second pin hole. There is a spline sleeve 2, and a conductive ring 2 with a spline hole is fitted on the outer circumference of the spline sleeve 2. A laying groove 2 is opened on the inner end plate of the upper base. The electromagnetic winding is provided with two conductive connecting ears. One conductive connecting ear of the electromagnetic winding is connected to the conductive ring 1 through the laying groove 1, and the other conductive connecting ear of the electromagnetic winding is connected to the conductive ring 2 through the laying groove 2. The lower base and the upper base between two adjacent chain plates are hinged to each other through the hinge pin through the pin hole 1 and the pin hole 2. The conductive ring 1 and the conductive ring 2 between two adjacent chain plates are coaxially arranged and axially fitted. The electromagnetic stator assembly 2 includes an electromagnetic stator chain with the same structure as the electromagnetic mover chain but with opposite magnetic poles.

[0009] Furthermore, the chain plates located at the middle and both ends of the electromagnetic drive chain are each fixed with connecting lugs at both transverse ends. Each connecting lug is connected to a hinge plate via a connecting pin, and the hinge plate has a vertically oriented elongated straight hole. The trolley main beam has longitudinally oriented end connecting pins at the corresponding end connecting lugs and intermediate connecting pins at the corresponding middle connecting lugs. Both the end and intermediate connecting pins are stepped shaft structures, and their outer convex shafts are slidably fitted into the corresponding elongated straight holes in the hinge plates. The outer convex shaft of the end connecting pin is cylindrical, allowing the two ends of the electromagnetic drive chain to swing around the end connecting pin via the connecting lugs and hinge plates. Limiting pins for restricting the swing angle of the hinge plates are located inside the end connecting pins on the trolley main beam. The outer convex shaft of the intermediate connecting pin is square columnar, allowing the middle part of the electromagnetic drive chain to move only in the vertical direction via the connecting lugs and hinge plates.

[0010] Furthermore, the suspended airbag 6 has a cuboid structure, with air inlets and outlets at both ends. One side of the end beam of the vehicle is equipped with an air pump, and the other side of the end beam of the vehicle is equipped with an air pump. The air pump and the air pump are connected to their corresponding air inlets and outlets through connecting pipes.

[0011] Furthermore, a support plate is longitudinally provided on the trolley end beam, and a T-shaped groove is longitudinally opened on the support plate; the traction mechanism includes a sliding plate, which is slidably connected to the support plate through the T-shaped groove, and a motor screw drive mechanism that can drive the support plate to slide is also provided on the support plate; both ends of the sliding plate are vertically provided with lifting and telescopic cylinders, and the telescopic ends of the lifting and telescopic cylinders are provided with support seats, and a traction winch is fixedly provided between the support seats, and the traction rope of the traction winch is connected to its corresponding trolley end beam.

[0012] Furthermore, the top of the large trolley wing beam is provided with a bottom steel rail laterally; each of the small trolley wing beams is provided with a trolley pulley assembly, which includes a vertically opened splined through hole on the trolley wing beam, a splined shaft is slidably sleeved in the splined through hole, both ends of the splined shaft pass through the trolley wing beam, both the upper and lower ends of the splined shaft are provided with a shaft shoulder, and a spring is sleeved on the splined shaft between its upper shaft shoulder and the trolley wing beam, and the end of the splined shaft is connected to a trolley wheel; when the crane trolley is normally suspended, the trolley wheel does not contact the bottom steel rail, and when the crane trolley is in a non-suspended state, the trolley wheel can roll and connect to the bottom steel rail.

[0013] Furthermore, each of the trolley wing beams is equipped with a trolley leveling mechanism, which includes two electric push rods vertically arranged on both sides of the top of the trolley wing beam, and the telescopic ends of the electric push rods are connected to push wheels; the wing plate is an inverted L-shaped plate structure, and the push wheel abuts against the bottom surface of the top plate of the wing plate; the crane trolley is also equipped with an inclinometer for detecting its tilt angle.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: This deflection-adaptive magnetic levitation bridge crane without camber, through the electromagnetic mover assembly on the trolley and the electromagnetic stator assembly on the main beam, allows the trolley to be stably suspended on the main beam. The trolley limit pulley system, trolley leveling mechanism, and longitudinally and vertically adjustable traction mechanism greatly increase the stability and control precision of the trolley during suspension operation. Furthermore, the electromagnetic mover assembly and suspension airbags enable the trolley to adaptively adjust its suspension state, ensuring that the trolley can smoothly and without resistance pass through the positions on the main beam where downward deflection occurs, eliminating the need for... The design concept of using an upward camber structure to offset the downward deflection of the main beam of the trolley significantly reduces the complexity of crane design and manufacturing costs, lowers crane maintenance and repair costs, and improves crane operating efficiency and stability. It also reduces the crane's dependence on materials, structural rigidity, and ambient temperature, while greatly reducing the running resistance of the trolley under no-load, light-load, and heavy-load conditions, further enhancing the overall performance of the crane. This camber-free, deflection-adaptive magnetic levitation bridge crane effectively reduces the running resistance of the trolley, thereby reducing the overall energy consumption and wear of the crane and extending the equipment's service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the crane explosion of the present invention; Figure 3 This is a schematic diagram of the lifting trolley structure of the present invention; Figure 4 This is a bottom view of the lifting trolley of the present invention; Figure 5 This is a schematic diagram of the wing beam structure of the vehicle of the present invention; Figure 6 This is a schematic diagram of the trolley limiting pulley system structure of the present invention; Figure 7 This is a side view of the trolley wing beam and the large trolley wing beam of the present invention; Figure 8 This is a front view of the main beam of the trolley of the present invention; Figure 9 This is a schematic diagram of the electromagnetic actuator assembly structure of the present invention; Figure 10 This is a schematic diagram of the chain plate structure of the present invention; Figure 11 This is a partial enlarged view of the chain plate of the present invention; Figure 12 This is a schematic diagram of the lower base structure of the present invention; Figure 13 This is a schematic diagram of the base structure of the present invention; Figure 14 This is a schematic diagram of the electromagnetic winding structure of the present invention; Figure 15 This is a schematic diagram of the chain plate structure with electromagnetic windings of the present invention; Figure 16 This is a schematic diagram of the electromagnetic winding connection structure between adjacent chain plates of the present invention; Figure 17 This is an enlarged view of the end of the main beam of the trolley of the present invention; Figure 18 This is an enlarged view of the middle part of the main beam of the trolley of the present invention; Figure 19 This is a schematic diagram of the end connecting pin structure of the present invention; Figure 20 This is a schematic diagram of the intermediate connecting pin structure of the present invention; Figure 21 This is a partial enlarged view of the main beam of the vehicle of the present invention; Figure 22 This is a schematic diagram of the traction mechanism structure of the present invention; Figure 23 This is a partial enlarged view of the side structure of the crane of the present invention.

[0016] In the diagram: 1. Trolley frame; 11. Trolley main beam; 111. Conductive sliding line II; 12. Trolley end beam; 121. Trolley wheel; 122. Drive motor; 123. Support plate; 124. T-shaped slide rail; 2. Electromagnetic stator assembly; 3. Trolley wing beam; 31. Wing plate; 311. Track support; 32. Slide rail; 33. Bottom rail; 4. Crane trolley; 41. Trolley main beam; 411. End connecting pin; 412. Intermediate connecting pin; 413. Hinge plate; 414. Limit pin; 42. Trolley end beam; 421. Conductive sliding line one; 43. Lifting winch; 5. Traction mechanism; 51. Sliding plate; 52. Motor screw drive mechanism; 53. Lifting and telescopic cylinder; 531. Support base; 54. Traction winch; 55. Traction rope; 6. Suspension airbag; 61. Inlet and outlet ports; 62. Air pump; 63. Air pump; 7. Electromagnetic actuator assembly; 71. Chain plate; 711. Receiving groove; 712. Hinge protrusion; 713. Lower base; 7131. Pin hole one; 7132. Spline sleeve one; 7133. Laying groove one; 714. Upper base; 7141. Pin hole two; 7142. Spline sleeve two; 7143. Laying groove two; 72. Electromagnetic winding; 721. Conductive connecting ear; 73. Hinge pin; 74. Conductive ring one; 75. Conductive ring two; 76. Connecting ear plate; 8. Trolley wing beam; 81. Trolley limiting pulley block; 811. Limiting shaft; 812. Limiting plate; 813. Wheel axle; 814. Limiting wheel; 82. Trolley leveling mechanism; 821. Electric jack rod; 822. Jack wheel; 83. Trolley pulley block; 831. Splined shaft; 832. Trolley wheel; 833. Spring 1; 834. Splined through hole; 9. Inclinometer; 10. Conductive bracket. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0018] Please see Figure 1-3 and Figure 22This invention provides a technical solution: a non-arched, deflection-adaptive magnetic levitation bridge crane, comprising two transversely arranged main beams 11 on a trolley frame 1, with trolley end beams 12 fixed between both ends of the main beams 11, and trolley wheels 121 at the bottom of both sides of the trolley end beams 12, and a drive motor 122 for driving the trolley wheels 121 to rotate on the trolley end beams 12; a lifting trolley 4 that can move laterally along its main beams 11 is provided on the trolley frame 1, and a traction mechanism 5 for pulling the lifting trolley 4 laterally is provided on each of the trolley end beams 12; the main beams 11 are non-arched box beam structures, and the lifting trolley 4 comprises two trolley main beams 41 arranged parallel to the main beams 11, with trolley end beams 42 between both ends of the trolley main beams 41, and a hoisting winch 43 for lifting goods is provided between the trolley main beams 41; Please refer to the following: Figure 4 and Figure 8 Each of the main beams 41 of the vehicle is fixedly equipped with a suspension airbag 6 that matches the shape of its bottom surface. The suspension airbag 6 has a certain air pressure inside and is a cuboid structure. Both ends of the suspension airbag 6 are provided with air inlet and exhaust outlets 61. One side of the end beam 42 of the vehicle is provided with an air pump 62, and the other side of the end beam 42 of the vehicle is provided with an air pump 63. The air pump 62 and the air pump 63 are connected to their corresponding air inlet and exhaust outlets 61 through connecting pipes. The bottom of the suspension airbag 6 is provided with an electromagnetic actuator assembly 7. Please refer to the following: Figure 8-16The electromagnetic actuator assembly 7 includes several chain plates 71 arranged closely in a transverse direction. Each chain plate 71 has a hinge protrusion 712 at its longitudinal ends on both sides. Each chain plate 71 has an electromagnetic winding 72 on its bottom surface. Adjacent chain plates 71 are hinged together by hinge pins 73 passing through their hinge protrusions 712. Adjacent electromagnetic windings 72 are interconnected to form an electromagnetic actuator chain, which is fixed to the lower surface of the suspension airbag 6. Each chain plate 71 has a receiving groove 711 on its bottom surface for fixing the electromagnetic windings 72. Nested within the receiving groove 711; the chain plate 71 has a lower base 713 and an upper base 714 on both sides of its lateral end, respectively. The lower base 713 has a pin hole 7131 in the longitudinal direction, and the pin hole 7131 is coaxially arranged with the corresponding hinge pin 73. The lower base 713 has a spline sleeve 7132 on the outer end of the corresponding pin hole 7131. A conductive ring 74 with a spline hole in the inner hole is fitted on the outer circumference of the spline sleeve 7132. The top wall of the lower base 713 has a laying groove 7133; the upper base The base 714 has a Z-shaped plate structure. A pin hole 7141 is longitudinally formed on the outer end plate of the upper base 714. The pin hole 7141 is coaxially arranged with its corresponding hinge pin 73. A spline sleeve 7142 is provided on the inner end of the outer end plate of the upper base 714, corresponding to the pin hole 7141. A conductive ring 75 with a spline hole is fitted on the outer circumferential wall of the spline sleeve 7142. A laying groove 7143 is formed on the inner end plate of the upper base 714. The electromagnetic winding 72 has two conductive connecting lugs. 721, one conductive connecting ear 721 of the electromagnetic winding 72 is connected to the first conductive ring 74 via the first laying groove 7133, and the other conductive connecting ear 721 of the electromagnetic winding 72 is connected to the second conductive ring 75 via the second laying groove 7143. The lower base 713 and the upper base 714 between two adjacent chain plates 71 are hinged to each other through the first pin hole 7131 and the second pin hole 7141 via the hinge pin 73. The first conductive ring 74 and the second conductive ring 75 between two adjacent chain plates 71 are coaxially arranged and axially fitted. Please refer to the following: Figure 17-20The chain plates 71 located at the middle and both ends of the electromagnetic drive chain are each fixed with connecting lugs 76 at both transverse ends. Each connecting lug 76 is connected to a hinge plate 413 via a connecting pin. The hinge plate 413 has a vertically arranged straight elongated hole. The trolley main beam 41 has end connecting pins 411 longitudinally at the corresponding end connecting lugs 76, and intermediate connecting pins 412 longitudinally at the corresponding middle connecting lug 76. Both the end connecting pins 411 and the intermediate connecting pins 412 are stepped shaft structures. The outer convex shafts of the intermediate connecting pins 412 are all slidably sleeved in the straight elongated holes of the corresponding hinge plates 413; the outer convex shafts of the end connecting pins 411 are cylindrical structures, and the two ends of the electromagnetic drive chain can swing around the end connecting pins 411 through the connecting ear plates 76 and the hinge plates 413, and the trolley main beam 41 is provided with limiting pins 414 on the inner side of the end connecting pins 411 to limit the swing angle of the hinge plates 413; the outer convex shafts of the intermediate connecting pins 412 are square column structures, and the middle part of the electromagnetic drive chain can only move in the vertical direction through the connecting ear plates 76 and the hinge plates 413. Please refer to the following: Figure 21 The upper surface of the main beam 11 of the trolley is provided with an electromagnetic stator assembly 2, and the electromagnetic stator assembly 2 includes an electromagnetic stator chain with the same structure and magnetic poles as the electromagnetic mover chain. After the electromagnetic winding 72 is energized, a repulsive force is generated between the electromagnetic stator assembly 2 and the electromagnetic stator chain, which makes the suspension airbag 6 and the crane trolley 4 suspend on the main beam 11 of the trolley. The electromagnetic mover assembly 7 is subjected to the same repulsive force exerted by the electromagnetic stator assembly 2 and the same elastic pressure exerted by the suspension airbag 6. The suspension airbag 6 is subjected to the upward force exerted by the electromagnetic mover chain and the weight of the crane trolley 4, which causes its top and bottom surfaces to come closer together and deform. Under normal conditions (i.e., the main beam 11 of the trolley does not undergo deflection deformation and the distance between the electromagnetic mover chain and the electromagnetic stator chain remains unchanged), the bottom surface of the suspension airbag 6 is a plane. Please refer to the following: Figure 22 The trolley end beam 12 is provided with a longitudinal support plate 123, and a T-shaped groove 124 is provided longitudinally on the support plate 123; the traction mechanism 5 includes a sliding plate 51, which is slidably connected to the support plate 123 through the T-shaped groove 124; the support plate 123 is also provided with a motor screw drive mechanism 52 that can drive the support plate 123 to slide; both ends of the sliding plate 51 are provided with vertical lifting telescopic cylinders 53, and the telescopic ends of the lifting telescopic cylinders 53 are provided with support seats 531; a traction winch 54 is fixed between the support seats 531; and the traction rope 55 of the traction winch 54 is connected to its corresponding trolley end beam 42. Please refer to the following: Figure 5-7The outer ends of the main beam 11 of the trolley are all fixed with trolley wing beams 3, and the outer ends of the trolley wing beams 3 are all provided with wing plates 31. The inner side of the wing plate 31 is provided with a track support 311 in the transverse direction. The top and bottom surfaces of the track support 311 are provided with sliding rails 32. In this embodiment, the track support 311 is provided with three sliding rails 32, and the sliding rails 32 are arranged in a triangular shape in the longitudinal direction. The outer ends of the main beam 41 of the trolley are all provided with trolley wing beams 8 in the transverse direction. The outer ends of the trolley wing beams 8 are all provided with trolley limiting pulley groups 81. The trolley limiting pulley groups 81 include vertical... The limiting plate 812 and the trolley wing beam 8 are provided with a longitudinally provided limiting shaft 811. The limiting plate 812 has a vertically provided limiting groove. The limiting shaft 811 is vertically slidably sleeved in the limiting groove. The upper and lower ends of the outer side of the limiting plate 812 are provided with axles 813 longitudinally. Each axle 813 is rotatably provided with a limiting wheel 814. In this embodiment, the upper axle 813 has one limiting wheel 814 and the lower axle 813 has two limiting wheels 814. The limiting wheels 814 are rotatably connected to the corresponding slide rail 32.

[0019] The top of each trolley wing beam 8 is provided with a trolley leveling mechanism 82. The trolley leveling mechanism 82 includes two electric push rods 821 vertically arranged on both sides of the top of the trolley wing beam 8, and the telescopic end of the electric push rod 821 is connected to a top wheel 822. The wing plate 31 is an inverted L-shaped plate structure, and the top wheel 822 abuts against the bottom surface of the top plate of the wing plate 31. The lifting trolley 4 is also provided with an inclinometer 9 for detecting its tilt angle.

[0020] The top of the main trolley spar 3 is provided with a bottom steel rail 33 laterally; each trolley spar 8 is provided with a trolley pulley assembly 83, the trolley pulley assembly 83 includes a splined through hole 834 vertically opened on the trolley spar 834, a splined shaft 831 is slidably sleeved in the splined through hole 834, both ends of the splined shaft 831 pass through the trolley spar 8, both the upper and lower ends of the splined shaft 831 are provided with a shaft shoulder, and a spring 833 is sleeved on the splined shaft 831 between its upper shaft shoulder and the trolley spar 8, the end of the splined shaft 831 is connected to a trolley wheel 832; when the crane trolley 4 is normally suspended, the trolley wheel 832 is not in contact with the bottom steel rail 33, when the crane trolley 4 is in a non-suspended state, the trolley wheel 832 can roll and be connected to the bottom steel rail 33.

[0021] Working principle: Before crane operation: Air is pumped into the suspension airbag 6 by the air pump 62 to make the suspension airbag 6 reach the rated inflation pressure, so that the electromagnetic windings 72 of the electromagnetic actuator assembly 7 and the electromagnetic stator assembly 2 are energized, and the electromagnetic actuator chain and the electromagnetic stator chain generate a repulsive force to make the crane trolley 4 suspend on the main beam 11 of the crane; when the crane trolley 4 rises, the limiting shaft 811 on its trolley wing beam 8 slides vertically along the limiting groove of the limiting plate 812, and after the crane trolley 4 is suspended, the top wheel 822 presses against the top plate of the wing plate 31; the lifting telescopic cylinder 53 extends to push the traction winch 54 to rise, so as to ensure that the traction rope 55 of the traction winch 54 pulls the crane trolley 4 horizontally; the inclinometer 9 measures whether the crane trolley 4 is in a horizontal state. If the inclinometer 9 is greater than the preset range, the electric top rod 821 is extended or retracted according to the inclinometer 4, so that the crane trolley 4 is corrected to a horizontal state; When the crane is in operation: the drive motor 122 drives the trolley wheels 121 to rotate, causing the crane to move longitudinally as a whole. The traction winch 54 pulls the trolley 4 to move laterally along the main beam 11 of the trolley, so that the hoisting winch 43 moves above the load. The hoisting winch 43 lifts the load. While the traction winch 54 is pulling the trolley 4 laterally, the motor screw drive mechanism 52 drives the sliding plate 51 and the traction winch 54 to move longitudinally, so as to ensure that the traction rope 55 of the traction winch 54 pulls the trolley 4 horizontally. The load is lifted and transported through the coordinated cooperation of the drive motor 122 and the traction mechanism 5. Since the curvature of the main beam 11 of the trolley is different at different positions and the load of the load is different each time it is lifted, the deflection of the main beam 11 of the trolley is different. When the trolley 4 moves laterally, the trolley leveling mechanism 82 adjusts the electric top rod 821 continuously according to the real-time feedback of the inclinometer 9, so as to ensure that the trolley 4 maintains a horizontal posture during operation. Because the gas pressure is uniform throughout the suspension airbag 6, and the upper surface of the suspension airbag 6 is flat and in close contact with the bottom surface of the trolley main beam 41, the suspension airbag 6 can evenly support the lifting trolley 4, ensuring that the forces on each area of ​​the trolley main beam 41 are consistent in the vertical direction. This effectively reduces the resistance when the upper roller 822 of the electric jacking rod 821 rolls, ensuring the stable vertical suspension of the lifting trolley 4. When the lifting trolley 4 moves to the position where the main beam 11 of the trolley undergoes downward deformation, the distance between the electromagnetic moving chain and the electromagnetic stationary chain at the position of downward deformation increases. The repulsive force exerted by the electromagnetic moving chain on the electromagnetic stationary chain at this position is less than the elastic pressure exerted on it by the bottom surface of the suspension airbag 6. The electromagnetic moving chain, which is attached to the bottom surface of the suspension airbag 6, also bends and deforms due to the elastic pressure, so that it adaptively adjusts its shape to adjust the gap change between the electromagnetic moving chain and the electromagnetic stationary chain caused by the deflection change of the main beam 11 of the trolley, ensuring that the crane trolley 4 can pass smoothly through the part of the main beam 11 with deflection change without resistance. The two ends of the electromagnetic moving chain swing around the end connecting pin 411 through the connecting ear plate 76 and the hinge plate 413, and the bending deformation of the two ends of the electromagnetic moving chain is limited by the limiting pin 414. The middle part of the electromagnetic moving chain moves only in the vertical direction through the connecting ear plate 76 and the hinge plate 413, thereby limiting the bending deformation of the electromagnetic moving chain to match the downward deflection deformation of the main beam 11 of the trolley. When the electromagnetic moving chain passes the position where the main beam 11 of the trolley undergoes downward deflection, the distance between the electromagnetic moving chain and the electromagnetic stationary chain decreases. The repulsive force exerted on the electromagnetic moving chain by the electromagnetic stationary chain is greater than the elastic pressure exerted on it by the suspension airbag 6, causing the suspension airbag 6 and the electromagnetic moving chain to return to their original shape. If the electromagnetic actuator assembly 7 or the electromagnetic stator assembly 2 malfunctions and the crane trolley 4 cannot levitate normally, the suction pump 63 extracts the gas from the levitation airbag 6. At this time, the volume of the levitation airbag 6 decreases, the crane trolley 4 descends, and the trolley wheels 832 on the trolley wing beam 8 abut against the bottom rail 33 on the main trolley wing beam 3, so that the crane trolley 4 can move laterally through the trolley wheels 832. This ensures the emergency operation capability of the crane in the event of a levitation failure and ensures the safety of personnel and goods.

[0022] Please refer to the following: Figure 23In this embodiment, a conductive sliding line 421 is provided on the end beam 42 of the trolley. The conductive sliding line 421 is close to one side of the main beam 11 of the trolley. The conductive sliding line 421 has a U-shaped bracket structure and the opening is set vertically. A conductive bracket 10 that can slide vertically is provided in the opening of the conductive sliding line 421. The conductive bracket 10 has an L-shaped structure and the bottom plate of the conductive bracket 10 faces the main beam 11 of the trolley. A second conductive sliding line 111 is provided laterally on the main beam 11 of the trolley. The second conductive sliding line 111 has a U-shaped slide rail structure. The base plate of the 10 is slidably fitted inside the slide rail of the second conductive slide rail 111. The conductive support 10 is a metal structure and has brushes at both ends. The second conductive slide rail 111 is connected to an external power source, and the electromagnetic stator assembly 2 can be electrically connected to the second conductive slide rail 111. The electrical equipment used on the crane trolley 4 can be electrically connected to the first conductive slide rail 421. This not only ensures the continuous power supply of the crane trolley 4 during movement, but also improves the stability and reliability of power transmission and reduces the risk of power outages caused by poor contact.

[0023] The camber-free, deflection-adaptive magnetic levitation bridge crane disclosed in this embodiment utilizes an electromagnetic actuator assembly 7 on the trolley 4 and an electromagnetic stator assembly 2 on the main beam 11 to ensure stable levitation of the trolley 4 on the main beam 11. The trolley limiting pulley block 81, the trolley leveling mechanism 82, and the longitudinally and vertically adjustable traction mechanism 5 significantly increase the stability and control precision of the trolley 4 during levitation operation. Furthermore, the electromagnetic actuator assembly 7 and the levitation airbag 6 enable the trolley 4 to adaptively adjust its levitation state, ensuring that the trolley 4 can smoothly and without resistance pass through the positions on the main beam 11 where downward deflection occurs. The design concept of using an upward camber structure to offset the downward deflection of the main beam 11 was eliminated, significantly reducing the complexity of crane design and manufacturing costs, lowering crane maintenance and repair costs, and improving crane operating efficiency and stability. It also reduced the crane's dependence on materials, structural rigidity, and ambient temperature, while greatly reducing the running resistance of the trolley 4 under no-load, light-load, and heavy-load conditions, further enhancing the overall performance of the crane. This camber-free, deflection-adaptive magnetic levitation bridge crane effectively reduces the running resistance of the trolley 4, thereby reducing the overall energy consumption and wear of the crane and extending the equipment's service life.

[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deflection-adaptive magnetic levitation bridge crane without camber, comprising a crane trolley mounted on a main trolley frame that can move laterally along its main beam, and a traction device mounted on the main trolley frame for traction of the crane trolley, characterized in that: The main beam of the trolley is a box girder structure without camber. The trolley includes two trolley main beams arranged parallel to the main beams. Each trolley main beam has a fixed suspension airbag at its bottom end, the bottom surface of which is adapted to its shape. The bottom surface of the suspension airbag is flat, and an electromagnetic actuator assembly is fitted to the bottom surface of the suspension airbag. The electromagnetic actuator assembly includes several closely arranged chain plates in a transverse direction. Each chain plate has an electromagnetic winding on its bottom surface. Adjacent chain plates are hinged together by hinge pins, and adjacent electromagnetic windings are electrically connected to form an electromagnetic actuator chain. The upper surface of the main beam is equipped with an electromagnetic stator assembly with the same magnetic poles as the electromagnetic actuator chain. The electromagnetic stator assembly and the electromagnetic drive chain generate a repulsive force, causing the suspension airbag and the crane trolley to suspend on the main beam of the crane. The suspension airbag is subjected to an upward force exerted on it by the electromagnetic drive chain and the weight of the crane trolley, causing its top and bottom surfaces to come closer together and deform. Under normal conditions, the bottom surface of the suspension airbag is flat. After the distance between the electromagnetic stator assembly and the electromagnetic drive chain changes, the repulsive force between them changes. At this time, the bottom surface of the suspension airbag bends and deforms as the repulsive force between the electromagnetic stator assembly and the electromagnetic drive chain changes, and the electromagnetic drive chain that is attached to the bottom surface of the suspension airbag also bends and deforms.

2. The camber-free, deflection-adaptive magnetic levitation bridge crane according to claim 1, characterized in that: The trolley frame includes two transversely arranged main beams, with trolley end beams fixed between both ends of the main beams. Trolley wheels are located at the bottom of both sides of the trolley end beams, and drive motors that can drive the trolley wheels to rotate are also installed on the trolley end beams. Trolley end beams are located between both ends of the trolley main beams, and a hoisting winch for lifting goods is located between the trolley main beams.

3. The camber-free, deflection-adaptive magnetic levitation bridge crane according to claim 1, characterized in that: The outer ends of the main beam of the trolley are all fixed with trolley wing beams, and the outer ends of the trolley wing beams are all equipped with wing plates. The inner side of the wing plates is provided with transverse rail supports, and the top and bottom surfaces of the rail supports are provided with slide rails. The outer ends of the main beam of the trolley are all provided with transverse trolley wing beams, and the outer ends of the trolley wing beams are all equipped with trolley limiting pulley groups. The trolley limiting pulley groups include vertically provided limiting plates and longitudinally provided limiting shafts on the trolley wing beams. The limiting plates have vertically provided limiting grooves, and the limiting shafts are vertically slidably fitted into the limiting grooves. The upper and lower ends of the outer side of the limiting plates are longitudinally provided with axles, and limiting wheels are rotatably provided on the axles. The limiting wheels are tumbledly connected to the corresponding slide rails.

4. The camber-free, deflection-adaptive magnetic levitation bridge crane according to claim 1, characterized in that: The bottom surface of each chain plate is provided with a receiving groove, and the electromagnetic winding is fixedly nested in the receiving groove. A lower base and an upper base are respectively provided on both sides of the transverse end of the chain plate. The lower base has a pin hole in the longitudinal direction, and the pin hole is coaxially arranged with its corresponding hinge pin. A spline sleeve is provided on the outer end of the lower base corresponding to the pin hole, and a conductive ring with a spline hole in the inner hole is fitted on the outer circumference of the spline sleeve. A laying groove is provided on the top wall of the lower base. The upper base is a Z-shaped plate structure. A second pin hole is provided in the longitudinal direction on the outer end plate of the upper base, and the second pin hole is coaxially arranged with its corresponding hinge pin. A spline hole is provided on the inner end of the outer end plate of the upper base corresponding to the second pin hole. The key sleeve two, the outer circumference of the spline sleeve two is fitted with a conductive ring two with a spline hole inside, and the inner end plate of the upper base is provided with a laying groove two; the electromagnetic winding is provided with two conductive connecting ears, one conductive connecting ear of the electromagnetic winding is connected to the conductive ring one through the laying groove one, and the other conductive connecting ear of the electromagnetic winding is connected to the conductive ring two through the laying groove two; the lower base and the upper base between two adjacent chain plates are hinged to each other by a hinge pin through pin hole one and pin hole two; the conductive ring one and the conductive ring two between two adjacent chain plates are coaxially arranged and axially fitted; the electromagnetic stator assembly includes an electromagnetic stator chain with the same structure as the electromagnetic mover chain but opposite magnetic poles.

5. A non-cambered, deflection-adaptive magnetic levitation bridge crane according to claim 4, characterized in that: The chain plates at the middle and both ends of the electromagnetic drive chain are each fixed with connecting lugs at both ends. Each connecting lug is connected to a hinge plate via a connecting pin. The hinge plate has a vertically oriented straight elongated hole. The main beam of the trolley has longitudinally oriented end connecting pins at the corresponding end connecting lugs and intermediate connecting pins at the corresponding middle connecting lugs. Both end and intermediate connecting pins are stepped shaft structures. The outer convex shafts of both end and intermediate connecting pins are slidably fitted into the straight elongated holes of their corresponding hinge plates. The outer convex shaft of the end connecting pin is cylindrical, allowing the two ends of the electromagnetic drive chain to swing around the end connecting pin via the connecting lugs and hinge plates. Limiting pins are provided on the inner side of the end connecting pins on the main beam of the trolley to restrict the swing angle of the hinge plates. The outer convex shaft of the intermediate connecting pin is square columnar, allowing the middle part of the electromagnetic drive chain to move only vertically via the connecting lugs and hinge plates.

6. A non-cambered, deflection-adaptive magnetic levitation bridge crane according to claim 2, characterized in that: The suspension airbag has a cuboid structure with air inlets and outlets at both ends. One side of the end beam of the vehicle is equipped with an air pump, and the other side of the end beam of the vehicle is equipped with an air pump. The air pump and the air pump are connected to their corresponding air inlets and outlets through connecting pipes.

7. A non-cambered, deflection-adaptive magnetic levitation bridge crane according to claim 2, characterized in that: The trolley end beam is longitudinally provided with a support plate, and the support plate is longitudinally provided with a T-shaped slide groove; the traction mechanism includes a sliding plate, which is slidably connected to the support plate through the T-shaped slide groove, and the support plate is also provided with a motor screw drive mechanism that can drive the support plate to slide; both ends of the sliding plate are vertically provided with lifting and telescopic cylinders, and the telescopic ends of the lifting and telescopic cylinders are provided with support seats, and a traction winch is fixedly provided between the support seats, and the traction rope of the traction winch is connected to its corresponding trolley end beam.

8. A non-cambered, deflection-adaptive magnetic levitation bridge crane according to claim 3, characterized in that: The top of the trolley wing beam is provided with a bottom steel rail laterally; each trolley wing beam is provided with a trolley pulley assembly, which includes a splined through hole vertically opened on the trolley wing beam. A splined shaft is slidably fitted in the splined through hole. Both ends of the splined shaft pass through the trolley wing beam. Shoulders are provided at both the upper and lower ends of the splined shaft. A spring is fitted on the splined shaft between its upper shoulder and the trolley wing beam. The end of the splined shaft is connected to a trolley wheel. When the trolley is normally suspended, the trolley wheel does not contact the bottom steel rail. When the trolley is in a non-suspended state, the trolley wheel can roll and connect to the bottom steel rail.

9. A non-cambered, deflection-adaptive magnetic levitation bridge crane according to claim 3, characterized in that: The top of each trolley wing beam is equipped with a trolley leveling mechanism, which includes two electric push rods vertically arranged on both sides of the top of the trolley wing beam, and the telescopic ends of the electric push rods are connected to push wheels; the wing plate is an inverted L-shaped plate structure, and the push wheel abuts against the bottom surface of the top plate of the wing plate; the crane trolley is also equipped with an inclinometer for detecting its tilt angle.

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