Single-beam lifting hook crane for overhauling

Abstract

The utility model relates to the technical field of single-beam cranes, in particular to a single-beam hook crane for maintenance, which comprises symmetrically arranged racks, cart mechanisms are arranged on the top surfaces of the racks on two sides, each cart mechanism comprises symmetrically arranged bridges and traveling mechanisms arranged at two ends of the bridges, and trolley mechanisms are arranged on the two bridges. The trolley mechanism comprises a trolley frame capable of moving in the direction of the bridge frame, a double-rope-outlet winding drum mechanism is arranged on the trolley frame, a cantilever beam located on the side of the bridge frame is fixedly arranged on the front side of the trolley frame, and a fixed pulley block is fixedly arranged at the outer end of the middle of the cantilever beam. The lifting range of the lifting hook assembly in a workshop is expanded, the lifting hook assembly is prevented from shaking in the lifting process, the stability, safety and placement accuracy of the device are improved, the lifting efficiency is improved, a plurality of lifting points are added, the device is suitable for balanced lifting of equipment with different gravity centers, and the situation that the equipment directly falls off due to accidental breakage of a cable is avoided.

Description

A single-girder hook crane for maintenance Technical Field

[0001] This utility model relates to the field of single-girder crane technology, and in particular to a single-girder hook crane for maintenance. Background Technology

[0002] Single-girder cranes, also known as single-girder bridge cranes, are a widely used, multi-span lightweight bridge structure. They are primarily used for loading, unloading, and handling goods within workshops. Due to their compact structure, light weight, smooth operation, high load-bearing capacity, and cost-effectiveness, single-girder cranes are widely used in factories and workshops, warehouses and logistics centers, construction sites, and in specialized industries such as petroleum, petrochemical, railway, civil aviation, and power plants.

[0003] The prior art, disclosed in publication number CN213326380U, discloses an electric single-girder crane, including a crane body and a limiting disc. The bottom end of the limiting disc has interconnected sliding holes and grooves arranged sequentially from bottom to top. Two L-shaped limiting plates, symmetrical about the sliding holes, are slidably installed in the grooves. A first rod is slidably installed in the sliding holes, with a limiting slot coaxially formed at the top of the first rod. This invention improves the speed of hook replacement by having the first rod slidably fitted in the middle of the sliding holes, allowing the hook to be removed easily when needed. A support rod is fixedly connected between the first and second rotating shafts, driving the L-shaped limiting plates to fix the first rod, making the connection between the hook and the limiting disc more stable, thereby improving the stability of the crane body.

[0004] However, the aforementioned existing technologies still have certain shortcomings in use: First, as with the existing technologies, the main beam of most single-girder cranes is located in the middle of the traveling mechanism, which limits the range of motion of the hook and makes it impossible to lift the outermost position normally; Second, the existing technologies only use one hook for lifting, which can easily cause the equipment to tilt after lifting when lifting irregular or non-centrally centered equipment, potentially damaging the device and resulting in low safety. Therefore, the existing technologies need to be further improved. Summary of the Invention

[0005] The purpose of this utility model is to provide a single-beam hook crane for maintenance, so as to solve the problems mentioned in the background art.

[0006] This utility model adopts the following technical solution: a single-beam hook crane for maintenance, including a symmetrically arranged frame, a trolley mechanism on the top surface of the frame on both sides, the trolley mechanism including a symmetrically arranged bridge frame and a traveling mechanism at both ends of the bridge frame, a trolley mechanism on the two bridge frames, the trolley mechanism including a trolley frame that can move along the direction of the bridge frame, a double-rope drum mechanism on the trolley frame, a cantilever beam fixedly arranged on the front side of the trolley frame and located on the side of the bridge frame, a fixed pulley block fixedly arranged at the outer end of the middle part of the cantilever beam, a fastening component on the top surface of the cantilever beam, the fastening component being located between the fixed pulley block and the double-rope drum mechanism, one end of the cable on the double-rope drum mechanism engaging with a pulley in the fixed pulley block and being fixedly connected to the fastening component from below the cantilever beam, a movable pulley block being arranged on the cable between the fixed pulley block and the fastening component, and a hook assembly being arranged below the movable pulley block.

[0007] Optionally, the movable pulley assembly includes a rectangular plate with two symmetrically arranged limit plates on the top surface of the rectangular plate. A rotating shaft is horizontally arranged at the upper end of the two limit plates. A rotating wheel is rotatably arranged on each of the rotating hands on both sides of the limit plate. The rotating wheel is connected to the cable. A protective sleeve that does not contact the rotating wheel is fitted on the rotating wheel. The protective sleeve is fixedly connected to the rotating shaft and the limit plate. A groove for the cable to move is opened on the upper end face of the protective sleeve.

[0008] Optionally, the movable pulley assembly also includes limiting parts symmetrically arranged on the top surface of the rectangular plate.

[0009] Optionally, the limiting part includes sleeve one and sleeve two. The top end of sleeve one is fixed to the bottom surface of the cantilever beam, sleeve two is slidably disposed inside sleeve one, one end of sleeve two is fixed to the top surface of the rectangular plate, and limiting plate one is located between the two sleeves two.

[0010] Optionally, a cylindrical groove is provided on the inner wall of the sleeve, and a limit ring is provided at the end of the sleeve away from the rectangular plate, the limit ring sliding in the cylindrical groove.

[0011] Optionally, the movable pulley block also includes a suspension point assembly located at the four corners of the rectangular plate. The suspension point assembly includes a limiting member rotatably mounted on the top surface of the rectangular plate. A U-shaped connector is inserted into the limiting member from bottom to top. The top of the U-shaped connector is fixed to the limiting member by a nut and a washer. A suspension rope can be connected to the U-shaped connector.

[0012] Optionally, the hook assembly includes two limiting plates symmetrically fixed to the bottom surface of the rectangular plate, and an mounting block is provided between the lower ends of the two limiting plates, with a hook connected to the mounting block.

[0013] Optionally, the top surface of the mounting block is provided with a columnar block, the top surface of the columnar block is provided with a rotating groove, and the top surface of the columnar block is provided with a number of limiting grooves communicating with the rotating groove in a circular array. One end of the hook passes through the mounting block from bottom to top and rotates with the rotating groove. The outer side of the top of the hook is symmetrically provided with limiting blocks that can be inserted into the limiting grooves.

[0014] Optionally, the cylindrical block has a cap with a threaded fit on the outside.

[0015] Optionally, a reinforcing rib is fixedly provided between the limiting plate 2 and the rectangular plate.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] 1. In this application, by setting a cantilever beam on the side of the trolley frame (i.e., the main beam) and setting the hook assembly below the end of the cantilever beam, the hook can be lifted to a wider range of equipment in the workshop, making it more practical.

[0018] 2. In this application, the movable pulley block also includes a rectangular plate. A sleeve one and a sleeve two are provided between the rectangular plate and the cantilever beam. Sleeve one is fixed on the cantilever beam, and sleeve two slides inside sleeve one and is fixed at its bottom to the rectangular plate. Thus, through the vertical sliding cooperation of sleeve one and sleeve two, the movable pulley block and the hook assembly below it can only move vertically during the rising or falling process. This not only effectively prevents the hook or equipment from swaying due to inertia or environmental factors during hoisting, reducing the possibility of equipment disengagement or damage or even breakage caused by the back-and-forth swinging of the cable, but also greatly improves the safety of the device. Furthermore, it allows the equipment to be repaired to be accurately placed on the same platform in the repair area without excessive adjustment of the equipment position, greatly improving hoisting efficiency and accuracy, and making it more practical.

[0019] 3. In this application, the rectangular plate is also provided with several lifting point components. The lifting point components include limiting members rotatably mounted on the rectangular plate, and U-shaped connectors are inserted and fixed on the limiting members. Through the cooperation of the rotatable limiting members and the U-shaped connectors that can be connected to additional lifting ropes, more lifting points can be provided during the lifting of equipment. This can effectively connect irregular (non-centrally centered) equipment so that the irregular equipment can be in a horizontal and balanced state when lifted, preventing the equipment from tilting after being lifted. This not only improves the stability and safety during the lifting process, but also reduces damage to the device and extends the service life of the equipment. Furthermore, when lifting regular or centrally centered equipment, the lifting point components can also increase the connection area and improve stability.

[0020] 4. In this application, a cylindrical groove is provided inside the first sleeve, and a limit ring is provided at the upper end of the second sleeve. Through the cooperation of the limit ring, the cylindrical groove and the lifting point assembly, the equipment can be effectively prevented from falling directly when the cable breaks, thus avoiding injury to the equipment and personnel on the bottom surface and improving the safety of the device.

[0021] 5. In the hook assembly of this application, a cylindrical block is provided on the top surface of the mounting block, and several limiting grooves are provided in a circular array on the top surface of the cylindrical block. A limiting block that can be inserted into any limiting groove is provided at the top of the hook. Thus, by setting the limiting block and several limiting grooves, the orientation of the hook can be adjusted, which facilitates the connection of lifting lugs with different orientations on the equipment and improves the connection efficiency. Attached Figure Description

[0022] Figure 1 is an overall front view of this utility model;

[0023] Figure 2 is a top view of the present invention;

[0024] Figure 3 is a left view of the entire utility model;

[0025] Figure 4 is a structural schematic diagram of the parts on the cantilever beam of this utility model;

[0026] Figure 5 is a left view of the parts on the cantilever beam of this utility model;

[0027] Figure 6 is a structural schematic diagram of the movable pulley block and hook assembly of this utility model;

[0028] Figure 7 is an exploded structural diagram of some parts of this utility model;

[0029] Figure 8 is a schematic diagram of the cylindrical block of this utility model;

[0030] Figure 9 is a schematic cross-sectional view of sleeve one and sleeve two of this utility model.

[0031] In the diagram: 1. Frame; 2. Trolley mechanism; 3. Bridge frame; 4. Traveling mechanism; 5. Trolley mechanism; 6. Trolley frame; 7. Double rope drum mechanism; 8. Cantilever beam; 9. Fixed pulley block; 10. Fastening assembly; 11. Moving pulley block; 12. Hook assembly; 13. Rectangular plate; 14. Limiting plate one; 15. Rotating shaft; 16. Rotating wheel; 17. Protective sleeve; 18. Groove; 19. Sleeve one; 20. Sleeve two; 21. Cylindrical groove; 22. Limiting ring; 23. Lifting point assembly; 24. Limiting component; 25. U-shaped connector; 26. Limiting plate two; 27. Mounting block; 28. Hook; 29. ​​Cylindrical block; 30. Limiting groove; 31. Limiting block; 32. Cover; 33. Reinforcing rib. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only a part of the embodiments disclosed in this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] Various non-limiting embodiments of this utility model are described in detail below. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.

[0034] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0035] Please refer to Figures 1-9. The following is a detailed description of the present invention in conjunction with the accompanying drawings and embodiments: A single-beam hook crane for maintenance includes a symmetrically arranged frame 1. A trolley mechanism 2 is provided on the top surface of the frame 1 on both sides. The trolley mechanism 2 includes a symmetrically arranged bridge frame 3 and a traveling mechanism 4 provided at both ends of the bridge frame 3. The traveling mechanism 4 enables the bridge frame 3 to move in the front-back direction on the frame 1. A trolley mechanism 5 is provided on the two bridge frames 3. The trolley mechanism 5 includes a trolley frame 6 that can move along the direction of the bridge frame 3. A double-rope drum mechanism 7 is provided on the trolley frame 6. A cantilever beam 8 is fixedly provided on the front side of the trolley frame 6, located on the side of the bridge frame 3. The outer end of the middle part of the cantilever beam 8 is fixed. A fixed pulley block 9 is provided, with at least two pulleys on it. A fastening assembly 10 is fixedly installed on the top surface of the cantilever beam 8, located between the fixed pulley block 9 and the double-rope drum mechanism 7. One end of the cable on the double-rope drum mechanism 7 engages with a pulley in the fixed pulley block 9 and is fixedly connected to the fastening assembly 10 from below the cantilever beam 8. A movable pulley block 11 is installed on the cable between the fixed pulley block 9 and the fastening assembly 10, and a hook assembly 12 is installed below the movable pulley block 11. By designing the cantilever beam 8 on the trolley frame 6 and placing it to the side of the bridge frame 3, the hook 28 can be positioned to the side of the bridge frame 3, allowing for a wider range of equipment to be lifted into the workshop. The traveling mechanism 4, trolley frame 6, double-rope drum mechanism 7, fixed pulley block 9, and fastening assembly 10 in the above structure are existing technologies and will not be described in detail here.

[0036] When the equipment needs to be hoisted to the maintenance area for maintenance, firstly, start the traveling mechanism 4 to gradually move the cable tray 3 and its structure towards the equipment until the hook assembly 12 is above the equipment. Then, adjust the position of the trolley frame 6 so that the hook assembly 12 is directly above the equipment. Then, start the double-rope winding mechanism 7 to unwind the hook assembly 12 to the top of the equipment and connect it. Then, start the double-rope winding mechanism 7 to wind up the equipment to a certain height. Then, move the equipment directly above the maintenance area through the traveling mechanism 4 and the trolley frame 6. Finally, use the double-rope winding mechanism 7 to unwind the equipment and place it stably on the workbench in the maintenance area for maintenance.

[0037] Please refer to Figure 6. The movable pulley block 11 includes a rectangular plate 13. Two limiting plates 14 are symmetrically fixed on the top surface of the rectangular plate 13. A rotating shaft 15 is horizontally fixed on the upper end of the two limiting plates 14. A rotating wheel 16 is rotatably mounted on the rotating hand on both sides of the limiting plate 14. The rotating wheel 16 is connected to the cable. A protective sleeve 17 that does not contact the rotating wheel 16 is fitted on the rotating wheel 16. The protective sleeve 17 is fixedly connected to the rotating shaft 15 and the limiting plate 14. The upper end face of the protective sleeve 17 has a groove 18 for the cable to move. The setting of the protective sleeve 17 can effectively prevent the cable from derailing and improve safety.

[0038] The movable pulley block 11 also includes limiting parts symmetrically arranged on the top surface of the rectangular plate 13.

[0039] Please refer to Figures 5-6. The limiting part includes sleeve 19 and sleeve 20. The top of sleeve 19 is fixed to the bottom surface of the cantilever beam 8, and sleeve 20 is slidably disposed inside sleeve 19. One end of sleeve 20 is fixed to the top surface of the rectangular plate 13. Limiting plate 14 is located between the two sleeves 20. Through the arrangement of sleeve 19 and sleeve 20, the moving pulley block 11 and the hook assembly 12 below it can only move vertically during the rising or falling process. This not only effectively prevents the hook 28 or equipment from shaking due to inertia or environmental factors during hoisting, but also reduces the possibility of equipment disengagement or damage or even breakage caused by the back-and-forth swing of the cable, greatly improving the safety of the device. Moreover, it can accurately place the equipment to be repaired on the same platform in the maintenance area without excessive adjustment of the equipment position, greatly improving the hoisting efficiency and accuracy, and making it more practical.

[0040] Please refer to Figures 5 and 9. A cylindrical groove 21 is provided on the inner wall of sleeve 19. A limit ring 22 is fixedly provided at the end of sleeve 19 away from rectangular plate 13. The limit ring 22 slides in the cylindrical groove 21. The setting of the limit ring 22 and the cylindrical groove 21 prevents the cable from breaking, causing the equipment on hook 28 to fall directly, thus avoiding injury to the equipment and personnel on the bottom surface.

[0041] Please refer to Figure 5-7. The movable pulley block 11 also includes lifting point assemblies 23 located at the four corners of the rectangular plate 13. The lifting point assembly 23 includes a limiting member 24 rotatably mounted on the top surface of the rectangular plate 13. A U-shaped connector 25 is inserted into the limiting member 24 from bottom to top. The top end of the U-shaped connector 25 is fixed to the limiting member 24 by a nut and a washer. A lifting rope can be connected to the U-shaped connector 25. The other end of the lifting rope can be connected to other positions of the equipment. By setting the limiting member 24 and the U-shaped connector, more lifting points can be provided during the lifting process. It can effectively connect irregular (non-centered) equipment so that the irregular equipment can be kept in a horizontal balance when lifted, preventing the equipment from tilting after lifting. This not only improves the stability and safety during the lifting process, but also reduces damage to the device and extends the service life of the equipment.

[0042] Please refer to Figure 6. The hook assembly 12 includes two limiting plates 26 symmetrically fixed to the bottom surface of the rectangular plate 13. An installation block 27 is fixedly arranged between the lower ends of the two limiting plates 26, and a hook 28 is connected to the installation block 27.

[0043] Please refer to Figure 6-8. A cylindrical block 29 is fixedly installed on the top surface of the mounting block 27. A rotating groove is opened on the top surface of the cylindrical block 29. Several limiting grooves 30 communicating with the rotating groove are arranged in a circular array on the top surface of the cylindrical block 29. One end of the hook 28 passes through the mounting block 27 from bottom to top and rotates with the rotating groove. A limiting block 31 that can be inserted into the limiting groove 30 is symmetrically fixed on the outer side of the top of the hook 28. Through the cooperation of the limiting groove 30 on the cylindrical block 29 and the limiting block 31 on the hook 28, the orientation of the hook 28 can be adjusted arbitrarily to adapt to the different orientations of the lifting lugs on the equipment and improve the convenience of connecting the hook 28.

[0044] Please refer to Figure 6-8. The outer thread of the cylindrical block 29 is provided with a cap 32. The cap 32 ensures a more stable connection of the hook 28, prevents the hook 28 from jumping in the vertical direction, and improves the connection strength.

[0045] Please refer to Figure 7. A reinforcing rib 33 is fixedly provided between the limiting plate 26 and the rectangular plate 13. By providing the reinforcing rib 33, the connection strength between the limiting plate 26 and the rectangular plate 13 is improved, and the bending resistance of the rectangular plate 13 is improved.

[0046] When this solution is in operation, firstly, the traveling mechanism 4 is activated to move the cable tray 3 and the hook assembly 12 below it in the front-to-back direction. Then, the trolley frame 6 is activated to move the hook assembly 12 in the left-to-right direction, thereby moving the hook assembly 12 directly above the equipment to be repaired. Then, the double-rope winding mechanism 7 is activated to unwind the hook assembly 12, causing it to gradually descend. When the hook 28 in the hook assembly 12 contacts the top surface of the equipment, the hook 28 is hooked onto the lifting lug on the top surface of the equipment. Then, the double-rope winding mechanism 7 is used to wind up the equipment, lifting it to a certain height. Then, the traveling mechanism 4 and the trolley frame 6 are moved to move the equipment directly above the maintenance area. Finally, the double-rope winding mechanism 7 is used to unwind the equipment and place it on the workbench in the maintenance area.

[0047] When the equipment being hoisted is irregular or has an off-center center of gravity, additional hoisting ropes can be attached to the four U-shaped connectors 25 on the rectangular plate 13. The hoisting ropes are connected to different positions on the top surface of the equipment, which not only ensures that the equipment is in a horizontal and balanced state when it is hoisted, but also enhances the connection strength during hoisting.

[0048] When the lifting lugs and hooks 28 on the equipment are facing different directions, first unscrew the cylindrical block 29, then lift the hook 28 upwards so that the limiting block 31 on the top surface of the hook 28 moves out of the current limiting groove 30. Then rotate the hook 28 so that the hook 28 faces the lifting lugs for easy connection. Then move the hook 28 downwards again and insert the limiting block 31 at the top of the hook 28 into the limiting groove 30 of the same direction. Finally, tighten the cover 32 back onto the cylindrical block 29.

[0049] Based on the above description in this specification, those skilled in the art will also understand that the following terms, such as "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," which indicate orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as a limitation on the present invention.

[0050] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A single-girder hook crane for maintenance, characterized in that: The system includes symmetrically arranged frames, with a trolley mechanism on the top surface of the frames on both sides. The trolley mechanism includes symmetrically arranged bridges and traveling mechanisms at both ends of the bridges. A trolley mechanism is installed on each of the two bridges, and the trolley mechanism includes a trolley frame that can move along the direction of the bridges. A double-rope drum mechanism is installed on the trolley frame. A cantilever beam is fixedly installed on the front side of the trolley frame, located on the side of the bridges. A fixed pulley block is fixedly installed at the outer end of the middle of the cantilever beam. A fastening assembly is installed on the top surface of the cantilever beam, located between the fixed pulley block and the double-rope drum mechanism. One end of the cable on the double-rope drum mechanism engages with a pulley in the fixed pulley block and is fixedly connected to the fastening assembly from below the cantilever beam. A movable pulley block is installed on the cable between the fixed pulley block and the fastening assembly, and a hook assembly is installed below the movable pulley block.

2. The single-girder hook crane for maintenance according to claim 1, characterized in that: The movable pulley assembly includes a rectangular plate with two symmetrically arranged limit plates on the top surface of the rectangular plate. A rotating shaft is horizontally arranged on the upper end of the two limit plates. A rotating wheel is rotatably arranged on the rotating hand on both sides of the limit plate. The rotating wheel is connected to the cable. A protective sleeve that does not contact the rotating wheel is fitted on the rotating wheel. The protective sleeve is fixedly connected to the rotating shaft and the limit plate. A groove for the cable to move is opened on the upper end face of the protective sleeve.

3. The single-girder hook crane for maintenance according to claim 2, characterized in that: The movable pulley assembly also includes limiting parts symmetrically arranged on the top surface of the rectangular plate.

4. The single-girder hook crane for maintenance according to claim 3, characterized in that: The limiting part includes sleeve one and sleeve two. The top end of sleeve one is fixed to the bottom surface of the cantilever beam, sleeve two is slidably disposed inside sleeve one, one end of sleeve two is fixed to the top surface of the rectangular plate, and limiting plate one is located between the two sleeves two.

5. The single-girder hook crane for maintenance according to claim 4, characterized in that: A cylindrical groove is provided on the inner wall of the sleeve, and a limit ring is provided at the end of the sleeve away from the rectangular plate. The limit ring slides in the cylindrical groove.

6. The single-girder hook crane for maintenance according to claim 2, characterized in that: The movable pulley block also includes lifting point assemblies located at the four corners of the rectangular plate. Each lifting point assembly includes a limiting member rotatably mounted on the top surface of the rectangular plate. A U-shaped connector is inserted into the limiting member from bottom to top. The top of the U-shaped connector is fixed to the limiting member by a nut and a washer. A lifting rope can be connected to the U-shaped connector.

7. The single-girder hook crane for maintenance according to claim 6, characterized in that: The hook assembly includes two limiting plates symmetrically fixed to the bottom surface of a rectangular plate. An installation block is provided between the lower ends of the two limiting plates, and a hook is connected to the installation block.

8. The single-girder hook crane for maintenance according to claim 7, characterized in that: The top surface of the mounting block is provided with a columnar block, the top surface of which has a rotating groove. The top surface of the columnar block has a ring array of several limiting grooves that communicate with the rotating groove. One end of the hook passes through the mounting block from bottom to top and rotates with the rotating groove. The outer side of the top of the hook is symmetrically provided with limiting blocks that can be inserted into the limiting grooves.

9. The single-girder hook crane for maintenance according to claim 8, characterized in that: The cylindrical block has a cap with threads on the outside.

10. The single-girder hook crane for maintenance according to claim 8, characterized in that: A reinforcing rib is fixedly installed between the limiting plate and the rectangular plate.

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