Safety maintenance device for portal crane

Abstract

The utility model relates to a safety maintenance device for a portal crane, which comprises a crane beam, a U-shaped frame slidably mounted at the bottom of the crane beam, a connecting frame fixedly mounted at the bottom of the U-shaped frame and a hanging basket fixedly mounted at the bottom of the connecting frame, and a stress plate is fixedly mounted on the back of the hanging basket. According to the safety maintenance device for the portal crane, a worker is borne by the hanging basket to maintain at the bottom of the cross beam of the crane, when heavy parts need to be disassembled, a second motor is started to drive a bidirectional lead screw to rotate, two rectangular plates are made to be away from protruding blocks, a supporting arm pushes a supporting plate to ascend to support the parts, and disassembly is convenient; then, a first motor drives a one-way lead screw to rotate, so that a moving plate moves left and right outside a transverse rod, a supporting plate is driven to move, and parts at different parts are conveniently supported; after disassembly, the two-way lead screw is rotated reversely, so that the two rectangular plates are close to the convex blocks, the supporting plate is pulled to descend through the supporting arm, and the part is driven to descend; the operation obviously reduces the danger of the maintenance operation.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gantry crane safety maintenance device belongs to the technical field of crane maintenance. BACKGROUND

[0002] As a kind of efficient and convenient hoisting equipment, gantry crane is widely used in port, shipyard, construction site and factory production line and other fields, however, due to the complexity of its structure and the diversity of working environment, the safety problem of gantry crane is particularly important, therefore, the research and application of a gantry crane safety maintenance device have important significance.

[0003] The Chinese utility model patent with publication number CN220317162U proposes a "safety maintenance device for electric hoist gantry crane", which proposes the problem that "the safety maintenance device for electric hoist gantry crane of prior art is relatively simple in structure, only bears workers through simple placement frame, which is inconvenient to move, and is difficult to move to fault point conveniently and stably, reducing the practicability of safety maintenance device", and provides the following technical solution: "by setting servo motor output end to drive a group of shafts and two groups of transmission gears to rotate simultaneously, the transmission gears on the front and rear sides can be meshed with the gear teeth on the front and rear sides respectively for transmission, so that the moving plate can smoothly drive the bearing plate, connecting rod, protective frame and table plate to move along the track of cross beam in horizontal direction, so that workers can conveniently reach fault point, improving the practicability of safety maintenance device".

[0004] The above device has the following defects in actual use: lack of auxiliary disassembly structure, when maintenance needs to disassemble parts, personnel need to hold the bottom of parts with hand, and then disassemble, which not only has high risk coefficient, but also delays maintenance progress, therefore, a gantry crane safety maintenance device is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a gantry crane safety maintenance device to overcome the deficiencies in the prior art.

[0006] To achieve the above purpose, the technical scheme adopted by the utility model is as follows:

[0007] A gantry crane safety maintenance device, comprising a crane cross beam, a U-shaped frame slidingly installed at the bottom of the crane cross beam, a connecting frame fixedly installed at the bottom of the U-shaped frame, and a hanging basket fixedly installed at the bottom of the connecting frame, the back of the hanging basket is fixedly installed with a stress plate, and the top of the stress plate is provided with an auxiliary disassembly and maintenance structure.

[0008] The auxiliary dismounting and repairing structure comprises a D-shaped frame fixedly installed at the top of the stress plate, a No.1 motor fixedly installed on the surface of the D-shaped frame, a unidirectional lead screw fixedly installed at the output end of the No.1 motor, the unidirectional lead screw being rotatably installed in the D-shaped frame, a horizontal rod fixedly installed at the front of the No.1 motor in the D-shaped frame, a moving plate slidably installed at the outside of the horizontal rod and threadedly connected with the unidirectional lead screw, two protrusions slidably installed in the moving plate and penetrating through the top of the moving plate, two rectangular plates fixedly installed at the top of the two protrusions, side columns fixedly installed at the front and back of the two rectangular plates, support arms rotatably installed at the outside of the four side columns, a supporting plate rotatably installed at the top of the four support arms, side supporting blocks fixedly installed at the top of the moving plate and close to the left and right sides of the moving plate, a No.2 motor fixedly installed at the right side of the side supporting block at the top of the moving plate, a bidirectional lead screw fixedly installed at the output end of the No.2 motor and threadedly installed in the two rectangular plates.

[0009] The utility model discloses the beneficial effects are: through the basket bearing staff is maintained at the bottom of the crane crossbeam, when needing to remove heavy spare parts, start no.

[0010] On the basis of the above technical scheme, the utility model still can make following improvement.

[0011] Further, the bottom of the crane crossbeam is fixedly installed with a rack, the inside of the N-shaped frame is fixedly installed with a driving gear meshing with the rack, the right side of the N-shaped frame is fixedly installed with a No.3 motor, and the output end of the No.3 motor is fixedly connected with the right side of the driving gear.

[0012] Further, the back of the basket is fixedly installed with a receiving cover, and the receiving cover is fixedly installed at the outside of the stress plate.

[0013] Further, the back of the basket is fixedly installed with a plurality of triangular supports, and the plurality of triangular supports are fixedly installed at the bottom of the stress plate.

[0014] Further, the bottom of the moving plate is fixedly installed with a plurality of supporting wheels, and the plurality of supporting wheels are slidably installed at the top of the stress plate.

[0015] Furthermore, a rectangular frame is fixedly installed on the top of the movable plate near its front and rear sides, and the four side posts are slidably installed inside the two rectangular frames respectively. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the safety maintenance device for gantry cranes of this utility model from one perspective.

[0017] Figure 2 This is a schematic diagram of the safety maintenance device for gantry cranes from another perspective.

[0018] Figure 3 This is a schematic diagram of the exploded structure of the safety maintenance device for gantry cranes of this utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the movable plate;

[0020] Figure 5 for Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 6 for Figure 2 Enlarged structural diagram at point B.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Crane beam; 2. U-shaped frame; 3. Connecting frame; 4. Suspended basket; 5. Load-bearing plate; 6. C-shaped frame; 7. Motor No. 1; 8. One-way lead screw; 9. Crossbar; 10. Moving plate; 11. Protrusion; 12. Rectangular plate; 13. Side column; 14. Support arm; 15. Pallet; 16. Side support block; 17. Motor No. 2; 18. Two-way lead screw; 19. Rack; 20. Drive gear; 21. Motor No. 3; 22. Receiving cover; 23. Triangular bracket; 24. Support wheel; 25. Rectangular frame. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0025] Example 1, such as Figures 1-5 As shown, a safety maintenance device for a gantry crane includes a crane beam 1, a U-shaped frame 2 slidably installed at the bottom of the crane beam 1, a connecting frame 3 fixedly installed at the bottom of the U-shaped frame 2, and a basket 4 fixedly installed at the bottom of the connecting frame 3. A load-bearing plate 5 is fixedly installed on the back of the basket 4, and an auxiliary disassembly and maintenance structure is provided on the top of the load-bearing plate 5.

[0026] Specifically, the auxiliary disassembly and maintenance structure includes a U-shaped frame 6 fixedly installed on the top of the load-bearing plate 5. A No. 1 motor 7 is fixedly installed on the surface of the U-shaped frame 6. A one-way screw 8 is fixedly installed at the output end of the No. 1 motor 7. The one-way screw 8 is rotatably installed inside the U-shaped frame 6. A crossbar 9 located in front of the No. 1 motor 7 is fixedly installed inside the U-shaped frame 6. A movable plate 10 threadedly connected to the one-way screw 8 is slidably installed on the outside of the crossbar 9. Two protrusions 11 extending to the top of the movable plate 10 are slidably installed inside the movable plate 10. Rectangular... The plate 12 has side columns 13 fixedly installed at both ends of the two rectangular plates 12. Support arms 14 are rotatably installed on the outside of the four side columns 13. A support plate 15 is rotatably installed on the top of the four support arms 14. Side support blocks 16 are fixedly installed on the top of the movable plate 10 near its left and right sides. A second motor 17 is fixedly installed on the right side of the side support block 16 located on the top right side of the movable plate 10. A bidirectional lead screw 18 is fixedly installed at the output end of the second motor 17. The bidirectional lead screw 18 is rotatably installed between the two side support blocks 16 and threaded into the inside of the two rectangular plates 12.

[0027] In use, the installed basket 4 carries workers to perform maintenance work at the bottom of the crane beam 1. When it is necessary to remove heavy parts, the second motor 17 can be started, which drives the bidirectional lead screw 18 to rotate forward, forcing the two rectangular plates 12 and the protrusion 11 to move away from each other. When the two rectangular plates 12 move away from each other, the four support arms 14 on their outer sides can push the support plate 15 to rise. When the support plate 15 rises to contact the bottom of the crane parts, the parts can be supported by the support plate 15 to facilitate disassembly. Afterwards, the first motor 7 drives the unidirectional lead screw... Rotating lever 8 in both directions forces the movable plate 10 to move left and right outside the crossbar 9. Subsequently, the movable plate 10 can drive the support plate 15 above it to move left and right, thus facilitating the lifting of crane parts from different locations. After the parts are removed, the double-acting screw 18 can be driven to rotate in the opposite direction by controlling motor 17, forcing the two rectangular plates 12 and the protrusion 11 to move closer to each other. When the two rectangular plates 12 move closer to each other, the support plate 15 can be pulled down by the four support arms 14 on its outer side. At this time, the removed crane parts can be lowered by the support plate 15. The above steps significantly reduce the danger of maintenance operations.

[0028] Example 2, as Figures 1-6 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0029] A rack 19 is fixedly installed at the bottom of the crane beam 1. A drive gear 20 that meshes with the rack 19 is fixedly installed inside the U-shaped frame 2. A No. 3 motor 21 is fixedly installed on the right side of the U-shaped frame 2. The output end of the No. 3 motor 21 is fixedly connected to the right side of the drive gear 20.

[0030] With this setup, the drive gear 20, driven by motor 21, rotates forward and backward at the bottom of rack 19, which can move the U-shaped frame 2, connecting frame 3, hanging basket 4, and auxiliary disassembly and maintenance structure back and forth, thus making it easier to bring workers closer to the fault area.

[0031] Example 3, as Figures 1-3 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0032] A receiving cover 22 is fixedly installed on the back of the suspended platform 4, and the receiving cover 22 is fixedly installed on the outside of the load-bearing plate 5.

[0033] This design allows the installed receiver cover 22 to easily catch falling screws or small parts.

[0034] Example 4, as Figures 2-3 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0035] Multiple triangular brackets 23 are fixedly installed on the back of the suspended platform 4, and all the triangular brackets 23 are fixedly installed on the bottom of the load-bearing plate 5.

[0036] This configuration allows the load-bearing plate 5 to be supported on the back of the crane beam 1 by multiple triangular brackets 23, thus achieving the purpose of support and reinforcement.

[0037] Example 5, as Figure 1 and Figure 5 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0038] Multiple support wheels 24 are fixedly installed at the bottom of the movable plate 10, and the multiple support wheels 24 slide on the top of the force plate 5.

[0039] This configuration allows the movable plate 10 to slide on top of the force plate 5 via multiple support wheels 24, thereby reducing the pressure on the unidirectional lead screw 8 and crossbar 9.

[0040] Example 6, as Figure 1 and Figure 5 As shown, this embodiment is a further improvement based on embodiment 1, and its specific details are as follows:

[0041] The top of the movable plate 10 is fixedly installed with rectangular frames 25 near its front and rear sides, and four side posts 13 are slidably installed inside the two rectangular frames 25 respectively.

[0042] In this way, the four side columns 13 are respectively limited to slide on the top of the moving plate 10 by the two supporting plates 15, so that the four supporting arms 14 are more stable when being folded.

[0043] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A safety maintenance device for a portal crane, comprising a crane beam (1), a U-shaped frame (2) slidingly mounted at the bottom of the crane beam (1), a connecting frame (3) fixedly mounted at the bottom of the U-shaped frame (2), and a hanging basket (4) fixedly mounted at the bottom of the connecting frame (3), characterized in that: The back of the hanging basket (4) is fixedly installed with a stress plate (5), and the top of the stress plate (5) is provided with an auxiliary dismounting and repairing structure. The auxiliary dismounting and repairing structure comprises a U-shaped frame (6) fixedly installed on the top of the stress plate (5), a No. 1 motor (7) fixedly installed on the surface of the U-shaped frame (6), a unidirectional lead screw (8) fixedly installed on the output end of the No. 1 motor (7), the unidirectional lead screw (8) rotatably installed in the U-shaped frame (6), a cross bar (9) fixedly installed in front of the No. 1 motor (7) in the U-shaped frame (6), a moving plate (10) threadedly connected with the unidirectional lead screw (8) slidably installed on the outside of the cross bar (9), two protrusions (11) slidably installed in the inside of the moving plate (10) and penetrating through the top of the moving plate (10), a rectangular plate (12) fixedly installed on the top of each of the two protrusions (11), a side column (13) fixedly installed on the front and back of each of the two rectangular plates (12), a support arm (14) rotatably installed on the outside of each of the four side columns (13), a supporting plate (15) rotatably installed on the top of each of the four support arms (14), a side supporting block (16) fixedly installed on the left and right of the top of the moving plate (10), a No. 2 motor (17) fixedly installed on the right of the side supporting block (16) on the right of the top of the moving plate (10), a bidirectional lead screw (18) fixedly installed on the output end of the No. 2 motor (17), and the bidirectional lead screw (18) rotatably installed between the two side supporting blocks (16) and threadedly installed in the inside of the two rectangular plates (12).

2. A portal crane safety maintenance device according to claim 1, characterized in that: The bottom of the crane cross beam (1) is fixedly installed with a rack (19), the inside of the U-shaped frame (2) is fixedly installed with a driving gear (20) engaged with the rack (19), the right side of the U-shaped frame (2) is fixedly installed with a No. 3 motor (21), and the output end of the No. 3 motor (21) is fixedly connected with the right side of the driving gear (20).

3. A portal crane safety maintenance device according to claim 1, characterized in that: The back of the hanging basket (4) is fixedly installed with a receiving cover (22) fixedly installed on the outside of the stress plate (5).

4. A portal crane safety maintenance device according to claim 1, characterized in that: The back of the hanging basket (4) is fixedly installed with a plurality of triangular supporting frames (23), and the plurality of triangular supporting frames (23) are fixedly installed on the bottom of the stress plate (5).

5. A portal crane safety maintenance device according to claim 1, characterized in that: The bottom of the moving plate (10) is fixedly installed with a plurality of supporting wheels (24) slidably installed on the top of the stress plate (5).

6. A portal crane safety maintenance device according to claim 1, characterized in that: The top of the moving plate (10) is fixedly installed with a rectangular frame (25) close to the front and back of the moving plate (10), and the four side columns (13) are slidably installed in the inside of the two rectangular frames (25), respectively.

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