Gantry crane for machining marine intermediate shaft

Abstract

The gantry crane for machining the marine intermediate shaft belongs to the technical field of intermediate shaft machining and comprises two stand columns and a movable pulley block, the upper ends of the two stand columns are jointly and fixedly connected with a cross beam, a sliding box with the lower portion open is arranged above the cross beam in a sliding mode, and a partition plate is arranged in the center of the sliding box; a mounting box is fixedly connected to one side of the sliding box, a first rotating shaft is rotationally connected into the mounting box, and a second rotating shaft is rotationally connected to the side, close to the sliding box, of the first rotating shaft in a sleeving mode. According to the gantry crane for machining the marine intermediate shaft, the driving assembly drives the first rotating shaft and the second rotating shaft to rotate in the opposite directions at the same speed, so that the two sleeves rotate in the opposite directions at the same speed, meanwhile, the two steel cables which are arranged in a central symmetry mode are matched, and stable rising of the movable pulley block is achieved; the problem that small-amplitude deviation and swing possibly occur along with rising of the movable pulley block when the movable pulleys are matched with the fixed pulley is solved, and the stability is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of intermediate shaft processing, and in particular relates to a gantry crane for processing a marine intermediate shaft. Background Art

[0002] The gantry crane for processing a ship intermediate shaft is a device used for lifting and processing a ship intermediate shaft or other ship items.

[0003] Existing gantry cranes for processing marine intermediate shafts are often used to achieve lifting through the cooperation of movable pulleys and fixed pulleys. Due to the hardness of the materials, the weight that a single movable pulley and fixed pulley can carry is relatively limited. When multiple movable pulleys and fixed pulleys are coordinated, they will rise with the movable pulley group. Since the steel cable is not vertical during winding in the movable pulley group and the fixed pulley group, a small deviation and swing may occur, and the stability is poor.

[0004] Therefore, we propose a gantry crane for processing marine intermediate shafts to solve the above problems. Utility Model Content

[0005] The purpose of the present application is to solve the problem of poor stability when multiple movable pulleys and fixed pulleys are matched in the prior art, and to propose a gantry crane for processing a ship intermediate shaft.

[0006] In order to achieve the above purpose, this application adopts the following technical solutions:

[0007] A gantry crane for processing a marine intermediate shaft comprises two columns and a movable pulley block, the upper ends of the two columns are commonly fixedly connected to a cross beam, a sliding box with an open bottom is slidably provided above the cross beam, a partition is provided at the center of the sliding box, one side of the sliding box is fixedly connected to a mounting box, a first rotating shaft is rotatably connected in the mounting box, a second rotating shaft is rotatably sleeved on a side of the first rotating shaft close to the sliding box, a first worm gear is fixedly sleeved on the first rotating shaft, a first gear is fixedly sleeved on the second rotating shaft, a driving assembly is provided at the upper end of the interior of the mounting box for simultaneously meshing the first worm gear and the first gear and driving the first rotating shaft and the second rotating shaft to rotate in opposite directions and at the same speed, the first rotating shaft and the second rotating shaft both extend into the sliding box and are fixedly sleeved with sleeves, and the two sleeves are respectively located on both sides of the partition, the ends of the two sleeves close to each other are fixedly connected to steel cables, the other end of the steel cables is fixedly connected to the bottom surface of the partition, and the two steel cables pass through the movable pulley block, and a hook is fixedly connected to the bottom surface of the movable pulley block.

[0008] Preferably, the driving assembly includes an auxiliary rod and a worm gear rotatably connected in the installation box, and the second gear and the second worm wheel are fixedly sleeved at both ends of the auxiliary rod, the first gear and the second gear are meshed with each other, and the first worm wheel and the second worm wheel are respectively meshed on the upper and lower sides of the worm gear.

[0009] Preferably, the two steel cables are centrally symmetrical, and the connection points between the two steel cables and the partition are respectively located at two ends of the bottom surface of the partition.

[0010] Preferably, a thread groove is provided on the surface of the sleeve, and the two thread grooves are arranged in opposite directions.

[0011] Preferably, a through slot for the steel cable to pass through is provided at the center of the top surface of the cross beam, slide rails are provided on both sides of the through slot, and wheels extending into the slide rails are provided at the four corners of the bottom surface of the sliding box.

[0012] Preferably, limit blocks are provided on both sides of the top surface of the cross beam, and both sides of the sliding box are in contact with the limit blocks on both sides.

[0013] To sum up, the technical effects and advantages of the present application are as follows: compared with the existing devices, the gantry crane for processing the intermediate shaft of a ship drives the first rotating shaft and the second rotating shaft to rotate in opposite directions at the same speed through the driving assembly, so as to realize the opposite and same-speed rotation of the two sleeves, and at the same time cooperates with two steel cables arranged in a central symmetrical manner to realize the stable rise of the movable pulley group. Compared with the existing devices, the problem of small offset and swinging that may occur when multiple movable pulleys and fixed pulleys cooperate with each other as the movable pulley group rises is avoided, thereby improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of this application;

[0015] Figure 2 It is a schematic diagram of the internal cross-sectional structure of the sliding box;

[0016] Figure 3 It is a front view of the interior section of the sliding box;

[0017] Figure 4 This is a top view of the structure of this application.

[0018] In the figure: 1. column; 2. movable pulley block; 3. crossbeam; 4. sliding box; 5. partition; 6. mounting box; 7. first rotating shaft; 8. second rotating shaft; 9. first worm gear; 10. first gear; 11. sleeve; 12. steel cable; 13. hook; 14. auxiliary rod; 15. worm; 16. second gear; 17. second worm gear; 18. threaded groove; 19. through groove; 20. slide rail; 21. limit block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0020] Reference Figure 1-3 A gantry crane for processing a ship intermediate shaft comprises two upright columns 1 and a movable pulley block 2, the upper ends of the two upright columns 1 are fixedly connected with a crossbeam 3, a sliding box 4 with an open bottom is slidably arranged above the crossbeam 3, a partition 5 is fixedly connected at the center of the sliding box 4, a mounting box 6 is fixedly connected to one side of the sliding box 4, a first rotating shaft 7 is rotatably connected in the mounting box 6, a second rotating shaft 8 is rotatably sleeved on the side of the first rotating shaft 7 close to the sliding box 4, a first worm gear 9 is fixedly sleeved on the first rotating shaft 7, a first gear 10 is fixedly sleeved on the second rotating shaft 8, a driving component is arranged at the upper end of the mounting box 6, which meshes with the first worm gear 9 and the first gear 10 at the same time and drives the first rotating shaft 7 and the second rotating shaft 8 to rotate in opposite directions at the same speed, the first rotating shaft 7 and the second rotating shaft 8 They all extend into the sliding box 4 and are fixedly sleeved with a sleeve 11, and the two sleeves 11 are respectively located on both sides of the partition 5, and the ends of the two sleeves 11 that are close to each other are fixedly connected with a steel cable 12, and the other end of the steel cable 12 is fixedly connected to the bottom surface of the partition 5, and the two steel cables 12 pass through the movable pulley block 2, and the bottom surface of the movable pulley block 2 is fixedly connected with a hook 13. The first rotating shaft 7 and the second rotating shaft 8 are driven by the driving component to rotate in opposite directions at the same speed, so as to realize the opposite and same-speed rotation of the two sleeves 11, and at the same time cooperate with the two steel cables 12 that are symmetrically arranged at the center to realize the stable rise of the movable pulley block 2. Compared with the existing device, it avoids the problem that multiple movable pulleys and fixed pulleys will have a small offset and swing when they cooperate with the movable pulley block 2, thereby improving stability.

[0021] Reference Figure 1-3 The driving assembly includes an auxiliary rod 14 and a worm 15 rotatably connected in the installation box 6. The second gear 16 and the second worm wheel 17 are fixedly sleeved at both ends of the auxiliary rod 14. The first gear 10 and the second gear 16 are meshed with each other. The first worm wheel 9 and the second worm wheel 17 are respectively meshed on the upper and lower sides of the worm 15. The worm 15 drives the first worm wheel 9 and the first rotating shaft 7 to rotate, and at the same time drives the second worm wheel 17 and the auxiliary rod 14 to rotate. At this time, the first gear 10 on the auxiliary rod 14 cooperates with the second gear 16 and drives the second rotating shaft 8 to rotate, and the two sleeves 11 rotate in opposite directions at the same speed. In addition, a motor for driving the worm 15 to rotate should be provided in the side wall of the installation box 6.

[0022] The two steel cables 12 are centrally symmetrical, and the connection points between the two steel cables 12 and the partition 5 are respectively located at the two ends of the bottom surface of the partition 5, so as to achieve the synchronous lifting of the movable pulley block 2 by the two steel cables 12. The centrally symmetrical design can prevent the steel cables 12 from causing the movable pulley block 2 to shift during the winding process.

[0023] The surface of the sleeve 11 is provided with a thread groove 18, and the two thread grooves 18 are arranged in opposite directions. The thread grooves 18 are used to achieve stable winding of the steel cable 12, thereby preventing the steel cable 12 from rolling into a ball during winding, thereby improving the stability of operation.

[0024] Reference Figure 4 A through slot 19 is provided at the center of the top surface of the cross beam 3 for the steel cable 12 to pass through, and slide rails 20 are provided on both sides of the through slot 19. Wheels extending into the slide rails 20 are provided at the four corners of the bottom surface of the sliding box 4. The slide rails 20 cooperate with the wheels to improve the stability and safety of the sliding box 4 when moving. In addition, a motor for driving the wheels to rotate should be provided in the side wall of the sliding box 4.

[0025] Limiting blocks 21 are provided on both sides of the top surface of the cross beam 3, and the two sides of the sliding box 4 are in contact with the limiting blocks 21 on both sides. The limiting blocks 21 limit the sliding box 4 to prevent it from leaving the cross beam 3, thereby further improving the stability and safety of the sliding box 4.

[0026] Working principle:

[0027] When the gantry crane for processing the intermediate shaft of a ship is in use, the workpiece is hung on the hook 13, and then the motor is turned on to drive the worm 15 to rotate. The worm 15 drives the first worm wheel 9 and the first rotating shaft 7 to rotate, and at the same time drives the second worm wheel 17 and the auxiliary rod 14 to rotate. At this time, the first gear 10 on the auxiliary rod 14 cooperates with the second gear 16 and drives the second rotating shaft 8 to rotate. The two sleeves 11 rotate in opposite directions at the same speed. The steel cable 12 is wound on the threaded groove 18 on the sleeve 11 and drives the movable pulley block 2 to rise until the cargo rises to a suitable height. At this time, the motor is turned on and the sliding box 4 is driven to move until the cargo moves to a suitable position above, and then the motor is reversed until the cargo moves to a suitable position. The above is the entire use process of the gantry crane for processing the intermediate shaft of a ship.

[0028] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and utility model concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A gantry crane for processing a ship intermediate shaft, comprising two columns (1) and a movable pulley block (2), characterized in that: The upper ends of the two uprights (1) are commonly fixedly connected to a crossbeam (3); a sliding box (4) with an open bottom is slidably provided above the crossbeam (3); a partition (5) is provided at the center of the sliding box (4); a mounting box (6) is fixedly connected to one side of the sliding box (4); a first rotating shaft (7) is rotatably connected inside the mounting box (6); a second rotating shaft (8) is rotatably sleeved on the side of the first rotating shaft (7) close to the sliding box (4); a first worm gear (9) is fixedly sleeved on the first rotating shaft (7); a first gear (10) is fixedly sleeved on the second rotating shaft (8); a meshing wheel (6) is provided at the upper end of the interior of the mounting box (6); A driving assembly is provided which combines a first worm gear (9) and a first gear (10) and drives a first rotating shaft (7) and a second rotating shaft (8) to rotate in opposite directions at the same speed. The first rotating shaft (7) and the second rotating shaft (8) both extend into a sliding box (4) and are fixedly sleeved with a sleeve (11). The two sleeves (11) are respectively located on both sides of a partition (5). One end of the two sleeves (11) close to each other is fixedly connected to a steel cable (12). The other end of the steel cable (12) is fixedly connected to the bottom surface of the partition (5). The two steel cables (12) pass through a movable pulley block (2). The bottom surface of the movable pulley block (2) is fixedly connected to a hook (13).

2. A gantry crane for processing a ship intermediate shaft according to claim 1, characterized in that: The driving assembly comprises an auxiliary rod (14) and a worm (15) which are rotatably connected in the installation box (6); a second gear (16) and a second worm wheel (17) are fixedly sleeved at both ends of the auxiliary rod (14); the first gear (10) and the second gear (16) are meshed with each other; and the first worm wheel (9) and the second worm wheel (17) are respectively meshed with the upper and lower sides of the worm (15).

3. The gantry crane for processing a ship intermediate shaft according to claim 1, characterized in that: The two steel cables (12) are centrally symmetrical, and the connection points between the two steel cables (12) and the partition (5) are respectively located at two ends of the bottom surface of the partition (5).

4. The gantry crane for processing a ship intermediate shaft according to claim 1, characterized in that: The surface of the sleeve (11) is provided with a thread groove (18), and the two thread grooves (18) are arranged in opposite directions.

5. The gantry crane for processing a ship intermediate shaft according to claim 1, characterized in that: A through slot (19) for the steel cable (12) to pass through is provided at the center of the top surface of the cross beam (3), slide rails (20) are provided on both sides of the through slot (19), and wheels extending into the slide rails (20) are provided at the four corners of the bottom surface of the sliding box (4).

6. The gantry crane for processing a ship intermediate shaft according to claim 5, characterized in that: Limit blocks (21) are provided on both sides of the top surface of the crossbeam (3), and both sides of the sliding box (4) are in contact with the limit blocks (21) on both sides.

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