Gantry crane

Abstract

The gantry crane comprises a hoisting mechanism and a buffering mechanism which are arranged on a supporting frame, the hoisting mechanism comprises a moving frame arranged on a cross beam in a sliding mode, a driving assembly is arranged in the moving frame, the bottom face of the moving frame is hinged to an assembling plate, a moving block is arranged on the bottom face of the assembling plate in a sliding mode, and a second driving device is arranged on the side face of the assembling plate. The output end of the second driving device is connected with a transmission lead screw which is in threaded connection with a moving block, and two sensor assemblies are symmetrically arranged on the top face of the assembling plate. The buffering mechanism comprises fixing blocks arranged at the two ends of the cross beam, and two damping rods are symmetrically arranged on the side faces of the fixing blocks. When the first pressure sensor bears the pressure of the cylindrical rod and the second pressure sensor bears the pulling force of the cylindrical rod, the second driving device drives the transmission lead screw to rotate in the forward direction until the first pressure sensor and the second pressure sensor do not bear the external force any more, the assembling plate rapidly recovers the balance state, and it is effectively ensured that the stress on the two sides of the cross beam is balanced.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry cranes, in particular to a gantry crane. Background Art

[0002] The gantry crane is a deformation of the bridge crane, commonly known as the gantry crane, which is mainly used for the loading and unloading operations of goods yards, material yards, and bulk goods. A utility model patent with the patent number "CN115636342B" and the patent name "A Gantry Crane Hanging Device" includes a gantry crane frame. A longitudinal connecting frame is arranged below the gantry crane frame. Sliding side grooves are respectively arranged above the middle parts on both sides of the gantry crane frame. Follow-up sliders are slidably connected inside the two sliding side grooves. One end of each follow-up slider is rotatably connected with a connecting ear. In this gantry crane hanging device, through the arrangement of the connecting bottom block and the second driving motor, the second driving motor drives the transmission lead screw to rotate. Through the meshing of the transmission lead screw and the connecting thread groove, the connecting bottom block is driven to move. Through the connecting bottom block, the middle mounting plate and the connecting hook are driven to move longitudinally. When suspending materials, the entire winding roller is driven to move.

[0003] However, the above gantry crane still has certain disadvantages in some usage situations: on the one hand, the above gantry crane cannot accurately adjust the position of the moving block according to the deflection degree of the winding roller, so that the winding roller cannot quickly return to a stable state, and the forces on both sides of the crossbeam cannot quickly return to uniformity. On the other hand, the two ends of the existing gantry crane crossbeam do not have a buffering effect, and the moving frame is prone to rigid contact with the two ends of the crossbeam, causing damage to the crossbeam and the moving frame. Therefore, a gantry crane is proposed to specifically solve the above defects. Summary of the Invention

[0004] The utility model overcomes the deficiencies of the prior art and provides a gantry crane.

[0005] To achieve the above object, the technical solution adopted by the utility model is as follows: A gantry crane includes a lifting mechanism and a buffering mechanism arranged on a support frame. The lifting mechanism includes a moving frame slidably arranged on a crossbeam. A driving assembly is arranged inside the moving frame. The bottom surface of the moving frame is hinged to an assembly plate. A moving block is slidably arranged on the bottom surface of the assembly plate. A second driving device is arranged on the side surface of the assembly plate. The output end of the second driving device is connected to a transmission lead screw. The transmission lead screw is threadedly connected to the moving block. Two sensor assemblies are symmetrically arranged on the top surface of the assembly plate. Both of the two sensor assemblies are signal-connected to the second driving device. The buffering mechanism includes fixing blocks arranged at both ends of the crossbeam. Two damping rods are symmetrically arranged on the side surfaces of the fixing blocks.

[0006] In a preferred embodiment of the present utility model, the driving assembly includes: a first driving gear and a second driving gear symmetrically arranged inside the moving frame. A first transmission gear is coaxially arranged on the outer side of the first driving gear and the outer side of the second driving gear. A first driving device is arranged on the side surface of the moving frame, and the output end of the first driving device is coaxially connected to a driving shaft. Two second transmission gears are symmetrically arranged on the outer peripheral side of the driving shaft, and the two second transmission gears are respectively meshed and connected to the first transmission gears.

[0007] In a preferred embodiment of the present utility model, two transmission racks are symmetrically arranged on the lower flange surface of the cross beam, and the two transmission racks are respectively meshed and connected to the first driving gear and the second driving gear.

[0008] In a preferred embodiment of the present utility model, a plurality of stay rods are symmetrically arranged on both sides of the moving frame. The upper end of the stay rod is hinged to the side surface of the moving frame, and the lower end of the stay rod is hinged to the top surface of the assembly plate.

[0009] In a preferred embodiment of the present utility model, the sensor assembly includes: a chute arranged on the top surface of the assembly plate. A counterweight block is arranged in the chute, and two pressure sensors are symmetrically arranged at both ends of the chute. Both sides of the counterweight block are respectively connected to the pressure sensors through cylindrical rods.

[0010] In a preferred embodiment of the present utility model, an auxiliary frame is arranged on the side surface of the damping rod, and a return spring is arranged on the outer peripheral side surface of the damping rod.

[0011] The present utility model solves the defects existing in the background technology, and the present utility model has the following beneficial effects:

[0012] (1) The present utility model detects whether the assembly plate is skewed through two sensor assemblies. When the first pressure sensor is subjected to the pressure of the cylindrical rod and the second pressure sensor is subjected to the tension of the cylindrical rod, the second driving device drives the transmission lead screw to rotate forward until the first pressure sensor and the second pressure sensor are no longer subjected to external forces, so that the assembly plate quickly returns to the balanced state, effectively ensuring the balanced force on both sides of the cross beam, and further preventing offset damage.

[0013] (2) The present utility model is provided with fixing blocks and damping rods at both ends of the cross beam. When the moving frame moves to both ends of the cross beam, the damping rod can play a certain buffering role. The damping rod cooperates with the return spring to generate a reaction force to gradually offset the impact force of the gantry crane, avoiding damage caused by the rigid collision of the moving frame with the end of the cross beam and improving the safety of the gantry crane during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further illustrates the present utility model in conjunction with the drawings and embodiments;

[0015] Figure 1 It is a three-dimensional structure diagram of a preferred embodiment of the present utility model;

[0016] Figure 2 It is a top view of a preferred embodiment of the present utility model;

[0017] Figure 3 is Figure 2 The schematic cross-sectional view at C-C in

[0018] Figure 4 is Figure 2 The schematic cross-sectional view at D-D in

[0019] Figure 5 is Figure 1 The enlarged schematic view at A in

[0020] Figure 6 is Figure 1 The enlarged schematic view at B in

[0021] Specifically, 1. Support frame; 2. Cross beam; 3. Moving frame; 4. Assembly plate; 5. Moving block; 6. Second driving device; 7. Transmission lead screw; 8. Fixed block; 9. Damping rod; 10. First driving gear; 11. Second driving gear; 12. First transmission gear; 13. Second transmission gear; 14. First driving device; 15. Driving shaft; 16. Transmission rack; 17. Pull rod; 18. Counterweight; 19. Pressure sensor; 20. Cylindrical rod; 21. Return spring. Detailed implementation manners

[0022] Now, the present utility model will be further described in detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0023] As Figure 1 , Figure 2 and Figure 4 shown, a gantry crane includes a lifting mechanism and a buffering mechanism provided on a support frame 1. The lifting mechanism includes a moving frame 3 slidably provided on a cross beam 2. A driving assembly is provided inside the moving frame 3. The bottom surface of the moving frame 3 is hinged to an assembly plate 4. A plurality of pull rods 17 are symmetrically provided on both sides of the moving frame 3. The upper end of the pull rod 17 is hinged to the side surface of the moving frame 3, and the lower end of the pull rod 17 is hinged to the top surface of the assembly plate 4. A moving block 5 is slidably provided on the bottom surface of the assembly plate 4. A second driving device 6 is provided on the side surface of the assembly plate 4. The output end of the second driving device 6 is connected to a transmission lead screw 7. The transmission lead screw 7 is threadedly connected to the moving block 5. Two sensor assemblies are symmetrically provided on the top surface of the assembly plate 4. Both of the two sensor assemblies are signal-connected to the second driving device 6; the buffering mechanism includes fixed blocks 8 provided at both ends of the cross beam 2. Two damping rods 9 are symmetrically provided on the side surfaces of the fixed blocks 8.

[0024] As Figure 3 and Figure 5 shown, in a preferred embodiment of the present utility model, the driving assembly includes: a first driving gear 10 and a second driving gear 11 symmetrically arranged inside the moving frame 3. A first transmission gear 12 is coaxially arranged on the outer sides of both the first driving gear 10 and the second driving gear 11. A first driving device 14 is arranged on the side surface of the moving frame 3, and the output end of the first driving device 14 is coaxially connected to a driving shaft 15. Two second transmission gears 13 are symmetrically arranged on the outer peripheral side of the driving shaft 15, and the two second transmission gears 13 are respectively meshed and connected to the first transmission gear 12. Two transmission racks 16 are symmetrically arranged on the lower flange surface of the cross beam 2, and the two transmission racks 16 are respectively meshed and connected to the first driving gear 10 and the second driving gear 11.

[0025] As Figure 4 shown, the sensor assembly includes: a chute arranged on the top surface of the mounting plate 4, a counterweight 18 arranged in the chute, and two pressure sensors 19 symmetrically arranged at both ends of the chute. Both sides of the counterweight 18 are respectively connected to the pressure sensors 19 through cylindrical rods 20. Whether the mounting plate 4 is skewed is detected by the two sensor assemblies. When the first pressure sensor 19 is subjected to the pressure of the cylindrical rod 20 and the second pressure sensor 19 is subjected to the tension of the cylindrical rod 20, the second driving device 6 drives the transmission lead screw 7 to rotate forward until the first pressure sensor 19 and the second pressure sensor 19 are no longer subjected to external forces, so that the mounting plate 4 quickly returns to the balanced state, effectively ensuring the balanced force on both sides of the cross beam 2, and further preventing offset damage.

[0026] As Figure 6 shown, in a preferred embodiment of the present utility model, through the fixing blocks 8 and the damping rods 9 arranged at both ends of the cross beam 2, an auxiliary frame is arranged on the side surface of the damping rod 9, and a return spring 21 is arranged on the outer peripheral side surface of the damping rod 9. When the moving frame 3 moves to both ends of the cross beam 2, the damping rod 9 can play a certain buffering role. The damping rod 9 simultaneously cooperates with the return spring 21 to generate a reaction force to gradually offset the impact force of the gantry crane, avoiding damage caused by the rigid collision between the moving frame 3 and the end of the cross beam 2, and improving the safety of the gantry crane during use.

[0027] When the utility model is in use, when a heavy object is hung by a hook and the center of gravity of the heavy object is not directly below the cross beam 2, the two sensor components detect whether the assembly plate 4 is skewed. When the first pressure sensor 19 is subjected to the pressure of the cylindrical rod 20 and the second pressure sensor 19 is subjected to the tension of the cylindrical rod 20, the second driving device 6 drives the transmission lead screw 7 to rotate forward. When the first pressure sensor 19 is subjected to the tension of the cylindrical rod 20 and the second pressure sensor 19 is subjected to the pressure of the cylindrical rod 20, the second driving device 6 drives the transmission lead screw 7 to rotate in the reverse direction; until the first pressure sensor 19 and the second pressure sensor 19 are no longer subjected to external forces, the assembly plate 4 quickly returns to the balanced state, effectively ensuring the balanced force on both sides of the cross beam 2, and further preventing deviation and damage from occurring.

[0028] Based on the ideal embodiments of the present utility model as inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. Gantry crane, including: A lifting mechanism and a buffer mechanism are arranged on a support frame (1), characterized in that the lifting mechanism comprises: a moving frame (3) slidably arranged on a beam (2), a driving assembly is arranged in the moving frame (3), the bottom surface of the moving frame (3) is hingedly connected to an assembly plate (4), a moving block (5) is slidably arranged on the bottom surface of the assembly plate (4), a second driving device (6) is arranged on the side of the assembly plate (4), the output end of the second driving device (6) is connected to a transmission screw (7), the transmission screw (7) is threadedly connected to the moving block (5), two sensor assemblies are symmetrically arranged on the top surface of the assembly plate (4), and the two sensor assemblies are both connected to the second driving device (6) by signal; the buffer mechanism comprises: fixed blocks (8) arranged at both ends of the beam (2), and two damping rods (9) are symmetrically arranged on the side of the fixed block (8).

2. The gantry crane according to claim 1, characterized in that: The driving assembly comprises: a first driving gear (10) and a second driving gear (11) symmetrically arranged on the inner side of the moving frame (3); a first transmission gear (12) coaxially arranged on the outer side of the first driving gear (10) and the outer side of the second driving gear (11); a first driving device (14) arranged on the side of the moving frame (3); an output end of the first driving device (14) coaxially connected to a driving shaft (15); two second transmission gears (13) symmetrically arranged on the outer peripheral side of the driving shaft (15); and the two second transmission gears (13) are respectively meshed and connected to the first transmission gear (12).

3. The gantry crane according to claim 2, characterized in that: Two transmission racks (16) are symmetrically arranged on the lower flange surface of the crossbeam (2), and the two transmission racks (16) are respectively meshed and connected with the first driving gear (10) and the second driving gear (11).

4. The gantry crane according to claim 1, characterized in that: A plurality of pulling rods (17) are symmetrically arranged on both sides of the movable frame (3); the upper ends of the pulling rods (17) are hingedly connected to the side surfaces of the movable frame (3); and the lower ends of the pulling rods (17) are hingedly connected to the top surface of the assembly plate (4).

5. The gantry crane according to claim 1, characterized in that: The sensor assembly comprises: a slide groove arranged on the top surface of the assembly plate (4), a counterweight block (18) arranged in the slide groove, two pressure sensors (19) symmetrically arranged at both ends of the slide groove, and the two sides of the counterweight block (18) are connected to the pressure sensors (19) via columnar rods (20) respectively.

6. The gantry crane according to claim 1, characterized in that: An auxiliary frame is arranged on the side of the damping rod (9), and a return spring (21) is arranged on the outer peripheral side of the damping rod (9).

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