Double-beam crane with lifting hook locking function

Abstract

The invention discloses a double-beam crane with a lifting hook locking function, and particularly relates to the technical field of cranes, the double-beam crane comprises two cross beams which are symmetrically distributed front and back, the upper ends of the two cross beams are fixedly connected with first guide rails, and the left ends and the right ends of the two first guide rails are fixedly provided with first limiting switches used for limiting the moving range; the upper ends of the two first guide rails are jointly provided with a driving mechanism, the upper end of the driving mechanism is fixedly provided with a lifting structure, the left side and the right side of the cross beam are symmetrically provided with longitudinal guide structures for guiding the moving track of the cross beam, and the lower end of the lifting structure is provided with a hoisting structure for hoisting materials. According to the double-beam crane with the lifting hook locking function, double rotating locking of the lifting hook is achieved through cooperation of the locking assembly and the hook head, anti-disengaging protection of the sling is achieved through the spring pressing plate, the running stability of equipment and the safety of hoisting operation are effectively improved, loads are dispersed, part abrasion is reduced, and the overall service life of the equipment is prolonged.

Description

Technical Field

[0001] This invention relates to the field of crane technology, and in particular to a double-girder crane with hook locking. Background Technology

[0002] The core of the heavy transport technology field is to realize the spatial transfer of heavy objects. It covers the relevant technical content of the entire process of structural design, processing, assembly, operation and maintenance of lifting equipment. This technology field is widely used in scenarios such as industrial production workshops, equipment manufacturing, warehousing and logistics, mining and metallurgy, etc., where heavy objects need to be hoisted and transferred. The double girder crane belongs to the bridge crane technology branch. The core revolves around the structural design and optimization of the whole machine's load-bearing structure, traveling drive mechanism, hoisting mechanism and hoisting execution mechanism. It is a core component of the lifting and transport technology field.

[0003] Chinese Patent Publication No. CN217732462U discloses a highly stable double-girder hook crane, including a trolley wheel assembly and a control box. The trolley wheel assemblies are rotatably connected by a rotating shaft. A drive gear is fixedly connected to one end of the rotating shaft near the trolley wheel assembly. A support plate is fixedly connected above the trolley wheel assembly near the drive gear. A bearing seat is fixedly connected to the side of the support plate near the control box.

[0004] Existing double-girder hook cranes are only designed and optimized around the trolley travel structure, without setting up anti-rotation and anti-detachment structures for the hook lifting execution process. During the lifting and transfer of heavy objects, the hook is prone to rotation due to collisions from eccentric loads, which can easily cause the sling to slip and the material to swing. At the same time, without load distribution structures and synchronous double steel cable winding and unwinding structures, the lifting structure is prone to tilting and load concentration during the lifting process, which can aggravate component wear and affect the stability of equipment operation and the safety of lifting operations. Summary of the Invention

[0005] The main objective of this invention is to provide a double-girder crane with a hook locking mechanism, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A double-girder crane with hook locking includes two crossbeams symmetrically distributed front and rear. The upper ends of the two crossbeams are fixedly connected to guide rails. Limit switches for limiting the range of movement are fixedly installed at both ends of the two guide rails. A drive mechanism is provided at the upper end of the two guide rails. A lifting structure is fixedly installed at the upper end of the drive mechanism. Longitudinal guide structures for guiding the movement trajectory of the crossbeams are symmetrically arranged on the left and right sides of the crossbeams. A lifting structure for hoisting materials is provided at the lower end of the lifting structure.

[0007] Preferably, the longitudinal guide structure includes a longitudinal steel beam installed longitudinally on the workshop wall, a guide rail two fixedly connected to the upper end of the longitudinal steel beam, limit switches two symmetrically fixedly connected to the upper end of the guide rail two, a connecting steel pipe connecting two crossbeams at the upper end of the longitudinal steel beam, rollers two fixedly connected to both ends of the connecting steel pipe, and a motor two driving the rollers two fixedly installed on one side of the longitudinal steel beam.

[0008] Preferably, the driving mechanism includes a trolley, the lower end of which is provided with a translation drive component adapted to the guide rail, the upper end of which is fixedly mounted with a mounting base, the upper end of which is fixedly mounted with a motor, the output end of which is driven by a gear reducer mounted on the upper end of the trolley via a coupling, and the output end of the gear reducer is driven by a lifting structure.

[0009] Preferably, the translation drive assembly includes a first roller that is rotatably mounted in a rectangular distribution on the lower end of the trolley. The first roller is slidably connected to the upper end of the guide rail. Two first rollers on the same side are fixedly connected to a drive shaft. The lower end of the trolley is fixedly mounted with a motor that drives the first roller through a bracket.

[0010] Preferably, the lifting structure includes a roller steel frame fixedly installed on the upper end of the crane. A winding roller is rotatably installed on the inner surface of the roller steel frame through a bearing bracket. Steel cables are symmetrically wound around the outer surface of the winding roller. The lower sides of the two steel cables are wound and connected to the hoisting structure. The winding roller is connected to the gear reducer through a coupling.

[0011] Preferably, the hoisting structure includes symmetrically distributed hook mounting plates, with a number of connecting bolts on both hook mounting plates. The hook mounting plates are fixed relative to each other by the connecting bolts. Protective boxes are fixedly connected to the ends of the two hook mounting plates that are far apart from each other. Winding reels that are wound around steel cables are rotatably connected to the inner surfaces of the two protective boxes. Synchronous shafts that are rotatably connected to the hook mounting plates are fixedly connected to both winding reels.

[0012] Preferably, the hoisting structure further includes a locking assembly disposed on the inner surface of the two hook mounting plates. The lower end of the locking assembly is fixedly connected to a hook head, and a spring pressure plate is rotatably connected to the hook head shank via a torsion spring.

[0013] Preferably, the locking assembly includes a support block fixedly connected to the two protective boxes on both sides. The upper end of the support block is symmetrically fixedly connected with reinforcing ribs fixedly connected to the side walls of the adjacent protective boxes. A connector is rotatably installed on the upper end of the support block. A limit groove is formed on the outer surface of the connector located in the inner cavity of the support block. A locking component for limiting the rotation of the spring pressure plate is provided on the inner surface of the limit groove. An electric telescopic rod for driving the locking component is symmetrically fixedly installed in the inner cavity of the support block.

[0014] Preferably, the locking component includes two sliders slidably connected to the inner cavity of the support block. The sliders are fixedly connected to the piston rod at the output end of the adjacent electric telescopic rod and translate relative to the connecting head under the action of the electric telescopic rod. Sliding plates are symmetrically slidably connected to the inner surface of the support block. The side of each sliding plate closest to the slider on the same side is connected to the slider via a ball joint. Spring plates driven by torsion springs are symmetrically rotatably connected to the inner surface of the limiting groove. A central pressure plate is slidably connected to the sides of the two spring plates that are close to each other. The two spring plates overlap with adjacent sliding plates. When the electric telescopic rod retracts, the sliding plates slide closer under the action of the sliders, pushing the spring plates to rotate and driving... The central pressure plate moves downward. When the electric telescopic rod extends, the slider resets and, under the action of the spring plate torsion spring, synchronously drives the central pressure plate and the sliding plate to reset. The lower part of the outer surface of the connector is rotatably connected to the connecting shaft, which is rotatably connected to the inner surface of the support block. The lower end of the connecting shaft is fixedly connected to the upper end of the hook head. The lower end of the connector is slidably connected to a star-shaped block. The upper end of the star-shaped block is fixedly connected to a connecting rod, which is fixedly connected to the lower end of the central pressure plate. The bottom wall of the inner surface of the connecting shaft is provided with a star-shaped groove that matches the shape of the star-shaped block. When the central pressure plate moves downward, the connecting rod synchronously drives the star-shaped block to move downward and lock it into the star-shaped groove, thus restricting the rotation of the connecting shaft and locking the rotation of the hook head.

[0015] Preferably, each of the two sliding plates has a limiting block fixedly connected to its upper end, which engages with the inner surface of the limiting groove. The limiting block cooperates with the sliding plate to restrict the rotation of the connector.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention achieves stable longitudinal displacement of the entire machine along the workshop through the cooperation of the crossbeam and the longitudinal guide structure, achieves lateral stability adjustment of the lifting point through the cooperation of the drive mechanism and the guide rail, achieves stable lifting and lowering of materials through the cooperation of the lifting structure and the hoisting structure, achieves double rotation locking of the hook through the cooperation of the locking component and the hook head, and achieves anti-derailment protection of the sling through the spring pressure plate. This effectively improves the stability of equipment operation and the safety of hoisting operations, distributes the load, reduces component wear, and extends the overall service life of the equipment.

[0017] 2. This invention provides stable support for the cable winding and unwinding operations through the cooperation of the roller steel frame and the winding roller of the lifting structure. The symmetrical winding of the double steel cables disperses the lifting load and suppresses swaying during the lifting process. The cooperation between the synchronous shaft of the lifting structure and the two winding reels ensures that the steel cables on both sides are wound and unwound synchronously, preventing the lifting structure from tilting. The strength of the main lifting structure is improved by the hook mounting plate and connecting bolts. The internal rotating parts are protected by the protective box, which effectively improves the stability of the lifting operation and the operational reliability of the lifting structure, and extends the service life of the components.

[0018] 3. This invention restricts the rotation of the hook head through the cooperation of the locking component and the hook head, automatically closes the hook head opening through the cooperation of the hook head and the spring pressure plate to prevent the sling from slipping, enhances the connection strength and disperses impact loads through the cooperation of the support block and the reinforcing rib, and achieves the locking and unlocking of the hook head through the cooperation of the electric telescopic rod and the locking component. The double cooperation of the star-shaped block and star-shaped groove, and the limit block and limit groove, forms a double locking protection for the hook head, avoids the failure of a single locking group, improves the safety of hoisting operations and the reliability of the locking structure, and ensures the stability of material hoisting. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the longitudinal guide structure of the present invention; Figure 3 This is a schematic diagram of the drive mechanism and lifting structure of the present invention; Figure 4 This is a side view of the hoisting structure of the present invention; Figure 5 This is a front view schematic diagram of the hoisting structure of the present invention; Figure 6 This is a cross-sectional structural diagram of the locking component of the present invention; Figure 7 This is a schematic diagram of the locking component of the present invention; Figure 8 This is a cross-sectional structural diagram of the locking component of the present invention; Figure 9 This is a schematic diagram showing the positional relationship between the star-shaped block and the star-shaped groove of the present invention.

[0020] In the diagram: 1. Crossbeam; 11. Limit switch one; 12. Guide rail one; 2. Drive mechanism; 21. Crane; 22. Translation drive assembly; 221. Roller one; 222. Motor one; 223. Drive shaft; 23. Mounting base; 24. Motor; 25. Gear reducer; 3. Lifting structure; 31. Roller steel frame; 32. Steel cable; 33. Winding roller; 4. Longitudinal guide structure; 41. Longitudinal steel beam; 42. Roller two; 43. Limit switch two; 44. Connecting steel pipe; 45. Guide rail two; 46. Motor two; 5. Lifting structure; 51. Anti- 52. Protective box; 53. Winding reel; 54. Connecting bolt; 55. Locking assembly; 56. Support block; 57. Reinforcing rib; 58. Connector; 59. Limiting groove; 50. Locking component; 51. Connecting shaft; 52. Slider; 53. Spring plate; 54. Sliding plate; 54. Center pressure plate; 54. Star groove; 55. Star block; 56. Connecting rod; 57. Limiting block; 58. Electric telescopic rod; 59. Hook; 50. Spring pressure plate; 51. Hook mounting plate; 52. Synchronous shaft. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0022] Example 1: A double-girder crane with hook locking, see reference. Figure 1 and Figure 2 The device includes two symmetrically distributed crossbeams 1, which serve as the core load-bearing structure. The symmetrical distribution of the crossbeams 1 can evenly bear the load transmitted by the upper drive mechanism 2 and the lifting structure 3, avoiding overload and structural deformation of a single crossbeam 1. The upper ends of the two crossbeams 1 are fixedly connected to guide rails 12, which provide stable support and guidance for the lateral movement of the drive mechanism 2, ensuring that the drive mechanism 2 moves smoothly along the length of the crossbeam 1. The left and right ends of the two guide rails 12 are fixedly equipped with limit switches 11 to limit the range of movement. The limit switches 11 can trigger a stop action when the drive mechanism 2 moves to the boundary of the two ends of the guide rails 12, preventing the drive mechanism 2 from exceeding the travel range of the guide rails 12 and preventing the drive mechanism 2 from falling off the end of the crossbeam 1 and causing damage to the equipment. The upper ends of the two guide rails 12 are jointly provided with the drive mechanism 2, which can drive the upper lifting structure 3 to complete the lateral position adjustment along the guide rails 12, realizing the lateral transfer of hoisted materials. The upper end of the drive mechanism 2 is fixedly equipped with a lifting structure 3. The lifting structure 3 can drive the lower hoisting structure 5 to complete the vertical lifting action, realizing the lifting and lowering of materials. The left and right sides of the crossbeam 1 are symmetrically equipped with longitudinal guide structures 4 to guide the movement trajectory of the crossbeam 1. The longitudinal guide structures 4 can drive the crossbeam 1 to complete the position adjustment along the longitudinal direction of the workshop, providing longitudinal movement capability for the equipment and realizing the transfer of materials within the longitudinal range of the workshop. The lower end of the lifting structure 3 is equipped with a hoisting structure 5 for hoisting materials. The hoisting structure 5 can directly cooperate with the material sling to complete the hanging operation of materials, and at the same time, it can lock and protect the hook to prevent the materials from falling off during the hoisting process.

[0023] For further details, please refer to [link / reference]. Figure 1 and Figure 2 The longitudinal guide structure 4 includes a longitudinal steel beam 41 installed longitudinally on the workshop wall. The longitudinal steel beam 41 serves as the load-bearing base of the longitudinal guide structure 4, providing stable installation support for all upper components. It also transfers the overall load of the equipment to the workshop wall, ensuring structural stability during equipment operation. A guide rail 45 is fixedly connected to the upper end of the longitudinal steel beam 41. The guide rail 45 provides a guiding path for the rolling of the roller 42, ensuring smooth movement of the connecting steel pipe 44 along the length of the longitudinal steel beam 41. Limit switches 43 are symmetrically fixedly connected to the upper end of the guide rail 45. The limit switches 43 can trigger a stop action when the connecting steel pipe 44 moves to the front and rear boundaries of the guide rail 45, preventing the connecting steel pipe 44 from exceeding the travel range of the guide rail 45 and preventing the connecting steel pipe 44 from causing the crossbeam 1 to derail. A connecting steel pipe 44 is installed at the upper end of the steel beam 41 to connect the two crossbeams 1. The connecting steel pipe 44 can connect the two crossbeams 1 into a whole, ensuring that the two crossbeams 1 remain synchronized during longitudinal movement and avoiding equipment jamming caused by misalignment of the two crossbeams 1. Rollers 42 are fixedly connected to both ends of the connecting steel pipe 44. The rollers 42 can transfer the overall load of the connecting steel pipe 44 and the crossbeam 1 to the guide rail 45. At the same time, the rollers 42 convert sliding friction into rolling friction through their own rotation, reducing the running resistance during the longitudinal movement of the equipment. A motor 46 is fixedly installed on one side of the longitudinal steel beam 41 to drive the rollers 42. The motor 46 can output rotational power to drive the rollers 42 to complete the rotation action, providing a power source for the longitudinal movement of the equipment and realizing the position adjustment of the whole machine along the longitudinal direction of the workshop.

[0024] For further details, please refer to [link / reference]. Figure 3The drive mechanism 2 includes a traveling trolley 21, which serves as the main load-bearing structure of the drive mechanism 2, providing a stable installation space and load-bearing support for the upper lifting structure 3 and related power components. A translation drive assembly 22, adapted to the guide rail 12, is installed at the lower end of the traveling trolley 21. The translation drive assembly 22 can drive the traveling trolley 21 to move laterally along the guide rail 12, achieving overall lateral position adjustment of the drive mechanism 2. A mounting base 23 is fixedly installed at the upper end of the traveling trolley 21, providing a stable installation reference for the motor 24, preventing vibration and displacement during motor 24 operation, and ensuring the stability of power transmission. The motor 24 is fixedly installed at the upper end of the mounting base 23. Motor 24 can convert electrical energy into rotational mechanical energy, providing a power source for the operation of lifting structure 3. The output end of motor 24 is connected to gear reducer 25 installed on the upper end of trolley 21 via a coupling. The coupling can buffer the impact load generated during the start and stop of motor 24, avoiding damage to the internal components of gear reducer 25 caused by power impact. Gear reducer 25 can reduce the output speed of motor 24 while increasing the output torque, providing sufficient power for lifting structure 3 to lift heavy materials. The output end of gear reducer 25 is connected to lifting structure 3, which can stably transmit the adjusted power to lifting structure 3, ensuring the smooth operation of lifting structure 3.

[0025] For further details, please refer to [link / reference]. Figure 3 The translation drive assembly 22 includes rectangularly distributed rollers 221 rotatably mounted on the lower end of the trolley 21. These rectangularly distributed rollers 221 evenly distribute the load of the trolley 21 and its superstructure onto the guide rail 12, reducing the load on a single set of rollers 221 and extending their service life. The rollers 221 are slidably connected to the upper end of the guide rail 12 and can drive the trolley 21 to move laterally along the guide rail 12 through their own rotation. Simultaneously, they convert sliding friction into rolling friction, reducing the running resistance of the trolley 21 during lateral movement. Two rollers 221 on the same side are fixedly connected together. There is a drive shaft 223, which can drive two rollers 221 on the same side to rotate synchronously, avoiding the movement deviation of the trolley 21 caused by the speed difference of the rollers 221 on the same side, and ensuring the stability of the trolley 21 during lateral movement. The motor 222 that drives the rollers 221 is fixedly installed at the lower end of the trolley 21 by a bracket. The bracket can provide stable installation support for the motor 222, preventing the motor 222 from loosening and falling off during operation. The motor 222 can output rotational power to drive the rollers 221 to complete the rotation action, providing a power source for the lateral movement of the trolley 21.

[0026] During operation of this embodiment, the cooperation between the crossbeam 1 and the longitudinal guide structure 4 enables the machine to move smoothly longitudinally along the workshop. The cooperation between the drive mechanism 2 and the guide rail 12 enables the lateral stability adjustment of the hoisting point. The cooperation between the lifting structure 3 and the hoisting structure 5 enables the smooth lifting and lowering of materials. The cooperation between the locking component 54 and the hook 55 enables the double rotation locking of the hook. The spring pressure plate 56 enables the anti-derailment protection of the sling. This effectively improves the stability of equipment operation and the safety of hoisting operations, distributes the load, reduces component wear, and extends the overall service life of the equipment.

[0027] Example 2: Based on Example 1, this example utilizes the cooperation between the roller steel frame 31 and the winding roller 33 of the lifting structure 3 to provide stable support for the winding and unwinding of the steel cable 32. The symmetrically wound double steel cables 32 disperse the lifting load and suppress swaying during the lifting process. The cooperation between the synchronous shaft 58 of the lifting structure 5 and the two winding reels 52 ensures that the steel cables 32 on both sides are wound and unwound synchronously, preventing the lifting structure 5 from tilting. The hook mounting plate 57 and connecting bolts 53 enhance the strength of the main lifting structure. The protective box 51 protects the internal rotating parts, effectively improving the stability of the lifting operation and the operational reliability of the lifting structure, and extending the service life of the components.

[0028] For further details, please refer to [link / reference]. Figure 3 The lifting structure 3 includes a roller steel frame 31 fixedly installed on the upper end of the crane 21. The roller steel frame 31 provides stable installation support for the winding roller 33, and can evenly transfer the lifting load borne by the winding roller 33 to the crane 21, avoiding structural deformation of the winding roller 33 during operation. The winding roller 33 is rotatably mounted on the inner surface of the roller steel frame 31 through a bearing bracket. The bearing bracket can reduce the frictional resistance of the winding roller 33 during rotation, and at the same time ensure the coaxiality of the rotation of the winding roller 33, avoiding radial runout during the rotation of the winding roller 33. Steel cables 32 are symmetrically wound and connected to the outer surface of the winding roller 33. The winding roller 33 can be driven by its own... The rotating body completes the winding and unwinding of the steel cable 32. The symmetrically wound double steel cables 32 can evenly distribute the lifting load, preventing a single steel cable 32 from bearing an overload. At the same time, it can suppress the swaying of the lifting structure 5 during the lifting process. The lower sides of the two steel cables 32 are wound and connected to the lifting structure 5. The winding and unwinding of the steel cables 32 can drive the lifting structure 5 to complete the vertical lifting and lowering action, realizing the lifting and lowering of materials. The winding roller 33 and the gear reducer 25 are connected by a coupling. The coupling can buffer the impact load during the power transmission process of the gear reducer 25, avoid impact causing structural damage to the winding roller 33, and ensure stable power transmission.

[0029] For further details, please refer to [link / reference]. Figure 4 and Figure 5The hoisting structure 5 includes symmetrically distributed hook mounting plates 57. The hook mounting plates 57 provide installation support and protection for all internal components of the hoisting structure 5. The symmetrical distribution allows for balanced load bearing during hoisting, preventing excessive stress on one side and structural deformation. Both hook mounting plates 57 are provided with several connecting bolts 53, which fix the hook mounting plates 57 relatively to each other. These connecting bolts 53 firmly connect the two hook mounting plates 57 into a single unit, improving the structural strength of the main hoisting structure, distributing the load during hoisting, and preventing structural damage caused by localized stress concentration. Protective boxes 51 are fixedly connected to the ends of the two hook mounting plates 57 that are furthest apart from each other. The protective boxes 51 provide full enclosure protection for the internal winding reel 52 and synchronous shaft 58. To prevent dust and debris from entering the rotating parts, reduce wear and jamming, and extend the service life of the components, both protective boxes 51 have rotatably connected winding reels 52 that are wound around the steel cable 32 on their inner surfaces. The winding reels 52 can cooperate with the steel cable 32 to convert the winding and unwinding of the steel cable 32 into the lifting and lowering of the hoisting structure 5. At the same time, they can limit the winding path of the steel cable 32 to prevent the steel cable 32 from becoming tangled. The two winding reels 52 are fixedly connected to a synchronous shaft 58 that is rotatably connected to the hook mounting plate 57. The synchronous shaft 58 can drive the two winding reels 52 to rotate synchronously, preventing the two winding reels 52 from having different rotation angles, preventing the hoisting structure 5 from tilting due to inconsistent winding and unwinding lengths of the steel cables 32 on both sides, and ensuring the levelness of the hoisting structure 5 during the lifting and lowering process.

[0030] In Example 3, based on Example 2, the rotation of the hook 55 is restricted through the cooperation of the locking component 54 and the hook 55. The opening of the hook 55 is automatically closed through the cooperation of the hook 55 and the spring pressure plate 56 to prevent the sling from slipping. The connection strength is improved and the impact load is dispersed through the cooperation of the support block 541 and the reinforcing rib 542. The locking and unlocking of the hook 55 is achieved through the cooperation of the electric telescopic rod 545 and the locking component 544. The double cooperation of the star block 5447 and the star groove 5446, and the limit block 5449 and the limit groove 5431 form a double locking protection for the hook 55, avoiding the failure of a single locking group, improving the safety of the hoisting operation and the reliability of the locking structure, and ensuring the stability of the material hoisting.

[0031] For further details, please refer to [link / reference]. Figure 5The lifting structure 5 also includes locking components 54 disposed on the inner surface of the two hook mounting plates 57. The locking components 54 can restrict the rotation of the hook head 55 to prevent the material from swinging due to the rotation of the hook head 55 during the lifting process. The hook head 55 is fixedly connected to the lower end of the locking components 54. The hook head 55 can directly cooperate with the material sling to complete the material hanging operation and provide a direct bearing part for the material lifting. The hook shank of the hook head 55 is rotatably connected to the spring pressure plate 56 through a torsion spring. The torsion spring can provide a continuous restoring force for the spring pressure plate 56. After the material sling is hung, the spring pressure plate 56 can automatically close the opening of the hook head 55 under the action of the torsion spring to prevent the material sling from slipping off the opening of the hook head 55 during the lifting process and improve the safety of the lifting operation.

[0032] For further details, please refer to [link / reference]. Figure 6 The locking assembly 54 includes support blocks 541 fixedly connected to the protective boxes 51 on both sides. The support blocks 541 provide installation support and load-bearing base for all internal components of the locking assembly 54, and can evenly transfer the lifting load transmitted by the hook head 55 to the protective boxes 51 and hook mounting plates 57 on both sides. The upper end of the support blocks 541 is symmetrically fixedly connected with reinforcing ribs 542 fixedly connected to the side walls of adjacent protective boxes 51. The reinforcing ribs 542 can improve the connection strength between the support blocks 541 and the protective boxes 51, disperse the impact load generated during the lifting process, and prevent deformation and breakage at the connection. The upper end of the support blocks 541 is rotatably mounted with connectors 543. Connectors 543 provide installation space for the locking assembly 544 and can transmit the load during the lifting process. The outer surface of the connectors 543 A limiting groove 5431 is provided in the inner cavity of the support block 541. The limiting groove 5431 provides a limiting space for the movement of the locking component 544 and provides a matching reference for the locking action. The inner surface of the limiting groove 5431 is provided with a locking component 544 for limiting the rotation of the spring pressure plate 56. The locking component 544 can complete the locking and unlocking operation of the hook head 55 through its own movement. The electric telescopic rod 545 that drives the locking component 544 is symmetrically fixedly installed in the inner cavity of the support block 541. The electric telescopic rod 545 can output linear power through its own telescopic movement to provide a power source for the locking and unlocking action of the locking component 544. The symmetrically arranged electric telescopic rods 545 can ensure the balanced force during the movement of the locking component 544 and avoid unilateral jamming.

[0033] For further details, please refer to [link / reference]. Figure 7 , Figure 8 and Figure 9The locking component 544 includes two sliders 5442 that are slidably connected to the inner cavity of the support block 541. The sliders 5442 are fixedly connected to the piston rod at the output end of the adjacent electric telescopic rod 545 and translate relative to the connector 543 under the action of the electric telescopic rod 545. The sliders 5442 can transmit the telescopic power of the electric telescopic rod 545 to the subsequent transmission components to provide power transmission for the locking action. The inner surface of the support block 541 is symmetrically slidably connected to a sliding plate 5444. The side of the sliding plate 5444 closest to the slider 5442 on the same side is connected to the slider 5442 through a ball joint. The ball joint can convert the horizontal translational movement of the slider 5442 into the sliding movement of the sliding plate 5444. At the same time, it can adapt to the angle change during the action and avoid jamming during the transmission. The inner surface of the limiting groove 5431 is symmetrically rotatably connected to a spring plate 5443 driven by a torsion spring. The torsion spring can provide a continuous reset force for the spring plate 5443 to ensure that the spring plate 5443 can be smoothly reset during the unlocking action. Two spring plates 5443 are slidably connected to a central pressure plate 5445 on their adjacent sides. The central pressure plate 5445 can perform vertical lifting and lowering movements under the action of the two spring plates 5443. The two spring plates 5443 overlap with adjacent sliding plates 5444, and the movement of the sliding plates 5444 can drive the spring plates 5443 to complete rotation. When the electric telescopic rod 545 retracts, the sliding plates 5444 slide closer under the action of the slider 5442, pushing the spring plates 5443 to rotate and driving the central pressure plate 5445. 445 moves downward. When the electric telescopic rod 545 extends, the slider 5442 resets and synchronously drives the central pressure plate 5445 and the sliding plate 5444 to reset under the action of the spring plate 5443 torsion spring. The lower part of the outer surface of the connector 543 is rotatably connected to the connecting shaft 5441, which is rotatably connected to the inner surface of the support block 541. The lower end of the connecting shaft 5441 is fixedly connected to the upper end of the hook head 55. The connecting shaft 5441 can drive the hook head 55 to rotate synchronously, and at the same time, it can transfer the lifting load borne by the hook head 55 to the upper connector 543. Furthermore, a star-shaped block 5447 is slidably connected to the lower end of the connector 543, and a connecting rod 5448 is fixedly connected to the upper end of the star-shaped block 5447 and fixedly connected to the lower end of the central pressure plate 5445. The connecting rod 5448 can synchronously transmit the vertical lifting action of the central pressure plate 5445 to the star-shaped block 5447, driving the star-shaped block 5447 to complete the synchronous lifting action. The bottom wall of the inner surface of the connecting shaft 5441 is provided with a star-shaped groove 5446 that matches the shape of the star-shaped block 5447. The star-shaped groove 5446 can be engaged with the star-shaped block 5447. When the central pressure plate 5445 moves downward, the connecting rod 5448 synchronously drives the star-shaped block 5447 to move downward and engage in the star-shaped groove 5446, restricting the rotation of the connecting shaft 5441 and thus locking the rotation of the hook head 55. This prevents the hook head 55 from rotating due to external forces during the hoisting process and prevents the material from swinging and falling off.

[0034] For further details, please refer to [link / reference]. Figure 8 Both sliding plates 5444 have a fixed limit block 5449 that engages with the inner surface of the limit groove 5431. The limit block 5449 can move synchronously with the sliding plate 5444. During locking, it can be engaged inside the limit groove 5431. The limit block 5449, together with the sliding plate 5444, restricts the rotation of the connector 543. Together with the locking structure of the star block 5447 and the star groove 5446, it forms a double protection to prevent the hook 55 from rotating due to the failure of a single locking structure, thus improving the reliability of the locking structure.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A double-girder crane with hook locking, comprising two crossbeams (1) symmetrically distributed front and rear, characterized in that: The upper ends of the two crossbeams (1) are fixedly connected to guide rails (12), and the left and right ends of the two guide rails (12) are fixedly installed with limit switches (11) for limiting the range of movement. The upper ends of the two guide rails (12) are jointly provided with a drive mechanism (2), and the upper end of the drive mechanism (2) is fixedly installed with a lifting structure (3). The left and right sides of the crossbeams (1) are symmetrically provided with longitudinal guide structures (4) to guide the movement trajectory of the crossbeams (1). The lower end of the lifting structure (3) is provided with a hoisting structure (5) for hoisting materials; the hoisting structure (5) includes The device includes symmetrically distributed hook mounting plates (57) and locking components (54) disposed on the inner surfaces of the two hook mounting plates (57). The locking components (54) include support blocks (541) fixedly connected to the two protective boxes (51). A connector (543) is rotatably mounted on the upper end of the support block (541). A limit groove (5431) is formed on the outer surface of the connector (543) in the inner cavity of the support block (541). A locking component (544) for limiting the rotation of the spring pressure plate (56) is provided on the inner surface of the limit groove (5431).

2. The double-girder crane with hook locking according to claim 1, characterized in that: The longitudinal guide structure (4) includes a longitudinal steel beam (41) installed longitudinally on the workshop wall. A guide rail (45) is fixedly connected to the upper end of the longitudinal steel beam (41). A limit switch (43) is fixedly connected to the upper end of the guide rail (45) symmetrically. A connecting steel pipe (44) connecting the front and rear crossbeams (1) is provided on the upper end of the longitudinal steel beam (41). Rollers (42) are fixedly connected to both ends of the connecting steel pipe (44). A motor (46) driving the rollers (42) is fixedly installed on one side of the longitudinal steel beam (41).

3. The double-girder crane with hook locking according to claim 1, characterized in that: The drive mechanism (2) includes a trolley (21). The lower end of the trolley (21) is provided with a translation drive assembly (22) adapted to the guide rail (12). The upper end of the trolley (21) is fixedly mounted with a mounting base (23). The upper end of the mounting base (23) is fixedly mounted with a motor (24). The output end of the motor (24) is connected to a gear reducer (25) mounted on the upper end of the trolley (21) via a coupling. The output end of the gear reducer (25) is connected to the lifting structure (3).

4. The double-girder crane with hook locking according to claim 3, characterized in that: The translation drive assembly (22) includes a first roller (221) that is rotatably mounted on the lower end of the trolley (21) in a rectangular distribution. The first roller (221) is slidably connected to the upper end of the guide rail (12). The two first rollers (221) on the same side are fixedly connected to a drive shaft (223). The lower end of the trolley (21) is fixedly mounted with a motor (222) that drives the first roller (221) through a bracket.

5. The double-girder crane with hook locking according to claim 3, characterized in that: The lifting structure (3) includes a roller steel frame (31) fixedly installed on the upper end of the crane (21). The inner surface of the roller steel frame (31) is rotatably mounted with a winding roller (33) through a bearing bracket. The outer surface of the winding roller (33) is symmetrically wound with steel cables (32). The lower sides of the two steel cables (32) are wound and connected to the hoisting structure (5). The winding roller (33) is connected to the gear reducer (25) through a coupling.

6. The double-girder crane with hook locking according to claim 5, characterized in that: The two hook mounting plates (57) are provided with a number of connecting bolts (53). The hook mounting plates (57) are fixed to each other by the connecting bolts (53). The ends of the two hook mounting plates (57) that are far apart from each other are respectively fixedly connected to protective boxes (51). The inner surfaces of the two protective boxes (51) are rotatably connected to winding reels (52) that are wound around the steel cable (32). The two winding reels (52) are fixedly connected to a synchronous shaft (58) that is rotatably connected to the hook mounting plates (57). The lower end of the locking assembly (54) is fixedly connected to a hook head (55). The hook head (55) is rotatably connected to a spring pressure plate (56) through a torsion spring at the hook handle.

7. The double-girder crane with hook locking according to claim 6, characterized in that: The upper end of the support block (541) is symmetrically and fixedly connected with reinforcing ribs (542) that are fixedly connected to the side wall of the adjacent protective box (51). The inner cavity of the support block (541) is symmetrically and fixedly installed with electric telescopic rods (545) that drive the locking component (544) to move.

8. The double-girder crane with hook locking according to claim 1, characterized in that: The locking component (544) includes two sliders (5442) slidably connected to the inner cavity of the support block (541). The sliders (5442) are fixedly connected to the piston rod at the output end of the adjacent electric telescopic rod (545) and translate relative to the connector (543) under the action of the electric telescopic rod (545). A sliding plate (5444) is symmetrically slidably connected to the inner surface of the support block (541). The side of the sliding plate (5444) closest to the slider (5442) on the same side is connected to the slider (5442) via a ball joint. A spring plate (5444) driven by a torsion spring is symmetrically rotatably connected to the inner surface of the limiting groove (5431). 443), the two spring plates (5443) are slidably connected to a central pressure plate (5445) on the side close to each other. The two spring plates (5443) overlap with the adjacent sliding plate (5444). When the electric telescopic rod (545) retracts, the sliding plate (5444) slides closer under the action of the slider (5442) and pushes the spring plate (5443) to rotate and drive the central pressure plate (5445) to move downward. When the electric telescopic rod (545) extends, the slider (5442) resets and synchronously drives the central pressure plate (5445) and the sliding plate (5444) to reset under the action of the torsion spring of the spring plate (5443). The lower part of the outer surface of the connector (543) is rotatably connected to the connecting shaft (5441) which is rotatably connected to the inner surface of the support block (541). The lower end of the connecting shaft (5441) is fixedly connected to the upper end of the hook (55). The lower end of the connector (543) is slidably connected to a star block (5447). The upper end of the star block (5447) is fixedly connected to a connecting rod (5448) which is fixedly connected to the lower end of the central pressure plate (5445). The bottom wall of the inner surface of the connecting shaft (5441) is provided with a star groove (5446) that matches the shape of the star block (5447). When the central pressure plate (5445) moves downward, the connecting rod (5448) drives the star block (5447) to move downward and lock it into the star groove (5446) to restrict the rotation of the connecting shaft (5441) and thus lock the rotation of the hook (55).

9. The double-girder crane with hook locking according to claim 8, characterized in that: Both sliding plates (5444) have a fixed upper end with a limiting block (5449) that engages with the inner surface of the limiting groove (5431). The limiting block (5449) cooperates with the sliding plate (5444) to restrict the rotation of the connector (543).

Images