Novel variable-amplitude rope winding arrangement for marine crane

Abstract

The invention discloses a novel variable-amplitude rope winding arrangement for a marine crane, and relates to the technical field of marine cranes, the novel variable-amplitude rope winding arrangement comprises a mounting bottom plate, a movable arm part is arranged at one end of the upper surface of the mounting bottom plate, and a supporting frame is arranged at the other end of the upper surface of the mounting bottom plate; two first pulley blocks are symmetrically arranged on the two sides of one end of the upper surface of the movable arm component, two second pulley blocks are symmetrically arranged on the two sides of the other end of the upper surface of the movable arm component, and four first pulley blocks are symmetrically arranged at the two ends of the upper face and the lower face of the top of the supporting frame correspondingly. Two main variable-amplitude winches are symmetrically arranged on the two sides of the bottom of the supporting frame, another two second pulley blocks are symmetrically arranged on the two sides of one ends of the two first pulley blocks, and two auxiliary variable-amplitude winches are symmetrically arranged on the two sides of one ends of the two main variable-amplitude winches. By means of the structure, the two auxiliary luffing winches are arranged, when the two main luffing winches are damaged, the two auxiliary luffing winches can replace the two main luffing winches to complete luffing operation, and normal work of the crane is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of marine crane technology, and specifically to a novel luffing rope arrangement for a marine crane. Background Technology

[0002] Marine cranes are lifting equipment specifically designed and installed on ships. They are firmly mounted on the hull and have flexible rotation and lifting functions. They can adapt to complex marine environments and ship swaying conditions, and can accurately and efficiently complete loading, unloading, and hoisting operations between ships and shore, and between ships and other vessels. They play a key role in ensuring the smooth flow of materials and the smooth operation of work in shipping logistics, marine engineering and other fields.

[0003] Existing marine cranes generally use a single luffing wire rope for traction operations. This design means the crane can only perform luffing operations when the wire rope is functioning normally. If this luffing wire rope malfunctions, the crane cannot luff and must be shut down for repairs. Furthermore, due to its unique structure, the repair process is relatively complex and difficult, affecting the crane's normal operation. Therefore, we propose a novel luffing wire rope arrangement for marine cranes to solve the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to provide a novel luffing rope arrangement for marine cranes, addressing the problem described in the background section that existing marine cranes primarily use a single luffing wire rope for traction operations. This design limits the crane's luffing operation to a specific condition: if the wire rope malfunctions, the crane cannot luff and must be shut down for repairs. Furthermore, due to the crane's unique structure, the repair process is relatively complex and difficult, further hindering its normal operation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A novel luffing rope arrangement for a marine crane includes a mounting base plate. A movable boom component is mounted on one end of the upper surface of the mounting base plate, and a support frame is inclinedly mounted on the other end of the upper surface of the mounting base plate. Two first pulley sets are symmetrically arranged on both sides of the upper surface of the movable boom component away from the mounting base plate, and two second pulley sets are symmetrically arranged on both sides of the other end of the upper surface of the movable boom component. Four first pulley sets are symmetrically arranged at both ends of the top and bottom surfaces of the support frame. Two main luffing winches are symmetrically arranged on both sides of the bottom of the support frame. Two additional second pulley sets are symmetrically arranged on both sides of the two first pulley sets near the two second pulley sets. Two secondary luffing winches are symmetrically arranged on both sides of the two main luffing winches away from the movable boom component.

[0006] Furthermore, the movable arm component includes an arm mounting base, the top of which is rotatably connected to an arm, and the bottom of which is fixedly connected to one end of the upper surface of the mounting base plate.

[0007] Furthermore, the support frame includes an A-frame, with two support rods symmetrically fixedly connected to both ends of the bottom of the A-frame. The bottom of the A-frame is fixedly connected to the other end of the upper surface of the mounting base plate, and the A-frame is inclined towards the end away from the movable arm component. The bottoms of the two support rods are fixedly connected to both sides of the upper surface of the mounting base plate.

[0008] Furthermore, the plurality of first pulley groups include a plurality of first mounting seats. Two first pressure blocks are symmetrically and movably mounted on the top ends of the plurality of first mounting seats by screws. A first mounting shaft is rotatably connected to the inner side of the first mounting seat. The bottom of the first mounting seat is fixedly connected to the upper and lower surfaces of the top of the A-frame and the upper surface of the boom, respectively. Two first limiting pins are symmetrically fixedly connected to the radial sides of the first mounting shaft. A plurality of first pulleys are evenly spaced on the first mounting shaft. The plurality of first pulleys are axially slidably connected to the first mounting shaft by the two first limiting pins.

[0009] Furthermore, the second pulley assembly includes a second mounting base. Two second pressure blocks are symmetrically and movably mounted on the top two ends of the second mounting base by screws. A second mounting shaft is rotatably connected to the inner side of the second mounting base. The bottom of the second mounting base is fixedly connected to the upper surface of the boom. Two second limiting pins are symmetrically and fixedly connected to the radial sides of the second mounting shaft. Multiple second pulleys are evenly spaced on the second mounting shaft. The multiple second pulleys are axially slidably connected to the second mounting shaft by two second limiting pins.

[0010] Furthermore, the two main luffing winches include two main motor bases, with main winches rotatably connected to the inner sides of the two main motor bases respectively. A main motor is fixedly connected to one side of the main motor base, and the bottom of the main motor base is fixedly connected to the upper surface of the mounting base plate. A main wire rope is fixedly connected to the inner side of the main winch. The output end of the main motor passes through the main motor base and is fixedly connected to one end of the main winch. The other end of the main wire rope is sequentially and cross-wound with the first pulley group on the lower surface of the top of the A-frame and two second pulley groups on the same side of the upper surface of the boom. The other end of the main wire rope is fixedly connected to the top of the A-frame.

[0011] Furthermore, the two luffing winches include two driven motor bases, with driven winches rotatably connected to the inner sides of the two driven motor bases respectively. A driven motor is fixedly connected to one side of the driven motor base, and the bottom of the driven motor base is fixedly connected to the upper surface of the mounting base plate. A driven wire rope is fixedly connected to the inner side of the driven winch. The output end of the driven motor passes through the driven motor base and is fixedly connected to one end of the driven winch. The other end of the driven wire rope is sequentially and cross-wound with the first pulley group on the upper surface of the A-frame and the first pulley group on the upper surface of the boom. The other end of the driven wire rope is fixedly connected to the top of the A-frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up two main luffing winches, can drive the boom to rotate around the boom mounting base through two first pulley groups on the lower surface of the support frame and four second pulley groups spaced apart on the boom, thereby adjusting the angle and performing luffing operations. Furthermore, by setting up two secondary luffing winches, can drive the boom to rotate around the boom mounting base through two first pulley groups on the upper surface of the support frame and two first pulley groups on the boom. This allows the secondary winches to replace the two main luffing winches in order to complete the luffing operation when the two main luffing winches are damaged, avoiding downtime for maintenance and ensuring the normal operation of the crane.

[0013] 2. The present invention enables the rapid removal of the first and second mounting shafts by means of two first pressure blocks and two second pressure blocks located at the top ends of the first and second mounting bases, allowing for the replacement and maintenance of the worn first and second pulleys. Furthermore, the invention enables the rapid disassembly and assembly of the first and second pulleys by means of two first limit pins and two second limit pins located on both sides of the first and second mounting shafts, reducing the difficulty of pulley maintenance, improving maintenance efficiency, and avoiding interference with the normal operation of the crane. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the mounting structure of the movable arm component of the present invention; Figure 3 This is a schematic diagram of the support frame installation structure of the present invention; Figure 4 This is a schematic diagram of the first pulley block structure of the present invention; Figure 5 This is a schematic diagram of the second pulley block structure of the present invention; Figure 6 This is a schematic diagram of the main luffing winch installation structure of the present invention; Figure 7 This is a schematic diagram of the installation structure of the luffing winch of the present invention; Reference numerals: 1. Mounting base plate; 2. Movable boom assembly; 201. Boom mounting seat; 202. Boom; 3. Support frame; 301. A-frame; 302. Support rod; 4. First pulley block; 401. First mounting seat; 402. First pressure block; 403. First mounting shaft; 404. First limit pin; 405. First pulley; 5. Second pulley block; 501. Second mounting seat; 502. Second pressure block; 503. Second mounting shaft; 504. Second limit pin; 505. Second pulley; 6. Main luffing winch; 601. Main motor base; 602. Main winch; 603. Main motor; 604. Main wire rope; 7. Driven luffing winch; 701. Driven motor base; 702. Driven winch; 703. Driven motor; 704. Driven wire rope. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Example 1: Please see Figures 1-3 , Figures 6-7 This invention provides a technical solution: a novel luffing rope arrangement for a marine crane, comprising a mounting base plate 1, a movable boom component 2 disposed at one end of the upper surface of the mounting base plate 1, and a support frame 3 disposed at the other end of the upper surface of the mounting base plate 1 at an incline. Two first pulley groups 4 are symmetrically arranged on both sides of the upper surface of the movable boom component 2 away from the mounting base plate 1, and two second pulley groups 5 are symmetrically arranged on both sides of the other end of the upper surface of the movable boom component 2. Four first pulley groups 4 are symmetrically arranged at both ends of the top upper and lower surfaces of the support frame 3. Two main luffing winches 6 are symmetrically arranged on both sides of the bottom of the support frame 3. Two additional second pulley groups 5 are symmetrically arranged on both sides of the two first pulley groups 4 near the two second pulley groups 5. Two secondary luffing winches 7 are symmetrically arranged on both sides of the two main luffing winches 6 away from the movable boom component 2.

[0017] The boom component 2 includes a boom mounting base 201, with a boom 202 rotatably connected to the top of the boom mounting base 201, and the bottom of the boom mounting base 201 is fixedly connected to one end of the upper surface of the mounting base plate 1.

[0018] The support frame 3 includes an A-frame 301, with two support rods 302 symmetrically fixedly connected to both ends of the bottom of the A-frame 301. The bottom of the A-frame 301 is fixedly connected to the other end of the upper surface of the mounting base plate 1, and the A-frame 301 is inclined away from the end of the movable boom component 2. The bottoms of the two support rods 302 are fixedly connected to both sides of the upper surface of the mounting base plate 1. By setting the support frame 3, the first pulley block 4 can be fixed, thereby forming a support point for the main wire rope 604 and the secondary wire rope 704, which facilitates the boom 202 to perform luffing operations.

[0019] The two main luffing winches 6 include two main motor bases 601, with main winches 602 rotatably connected to the inner sides of the two main motor bases 601 respectively. A main motor 603 is fixedly connected to one side of the main motor base 601. The bottom of the main motor base 601 is fixedly connected to the upper surface of the mounting base 1. A main wire rope 604 is fixedly connected to the inner side of the main winch 602. The output end of the main motor 603 passes through the main motor base 601 and is fixedly connected to one end of the main winch 602. The other end of the main wire rope 604 is interlocked with the first pulley group 4 on the lower surface of the top of the A-frame 301 and the two second pulley groups 5 on the same side of the upper surface of the boom 202. The other end of the main wire rope 604 is fixedly connected to the top of the A-frame 301. By setting up two main luffing winches 6, the boom 202 can be rotated around the boom mounting base 201 through the first pulley group 4 and the second pulley group 5 to perform luffing operations.

[0020] The two luffing winches 7 include two slave motor bases 701, with slave winches 702 rotatably connected to the inner sides of the two slave motor bases 701 respectively. A slave motor 703 is fixedly connected to one side of the slave motor base 701. The bottom of the slave motor base 701 is fixedly connected to the upper surface of the mounting base 1. A slave wire rope 704 is fixedly connected to the inner side of the slave winch 702. The output end of the slave motor 703 passes through the slave motor base 701 and is fixedly connected to one end of the slave winch 702. The other end of the wire rope 704 is sequentially and cross-wound with the first pulley group 4 on the top upper surface of the A-frame 301 and the first pulley group 4 on the upper surface of the boom 202. The other end of the wire rope 704 is fixedly connected to the top of the A-frame 301. By setting up two slave luffing winches 7, when the two main luffing winches 6 are damaged, they can replace the two main luffing winches 6 to drive the boom 202 to rotate around the boom mounting base 201 for luffing operations, avoiding downtime for maintenance and affecting the operation of the crane.

[0021] Working principle: The main motor 603 operates, driving the main winch 602 to rotate, which in turn winds up and unwinds the main wire rope 604. The main wire rope 604 sequentially winds around the first pulley block 4 on the lower surface of the A-frame 301 and the two second pulley blocks 5 on the same side of the upper surface of the boom 202, thereby driving the boom 202 to rotate around the boom mounting base 201, adjusting the angle for luffing operations. When the main luffing winch 6, the first pulley block 4, or the second pulley block 5 malfunctions, preventing the boom 202 from performing luffing operations, the motor... When 703 is activated, the secondary wire rope 704 is tightened, and then the main wire rope 604 is released, disconnecting the connection between the main luffing winch 6 and the boom 202. The secondary motor 703 drives the secondary winch 702 to rotate, thereby winding and unwinding the secondary wire rope 704. The secondary wire rope 704 sequentially interweaves with the first pulley group 4 on the top surface of the A-frame 301 and the first pulley group 4 on the top surface of the boom 202, thus replacing the main luffing winch 6, the first pulley group 4 and the second pulley group 5, driving the boom 202 to rotate around the boom mounting base 201 for luffing operations.

[0022] Example 2: Please see Figures 4-5 This invention provides a technical solution: a novel luffing rope arrangement for a marine crane, comprising a mounting base plate 1, a movable boom component 2 disposed at one end of the upper surface of the mounting base plate 1, and a support frame 3 disposed at the other end of the upper surface of the mounting base plate 1 at an incline. Two first pulley groups 4 are symmetrically arranged on both sides of the upper surface of the movable boom component 2 away from the mounting base plate 1, and two second pulley groups 5 are symmetrically arranged on both sides of the other end of the upper surface of the movable boom component 2. Four first pulley groups 4 are symmetrically arranged at both ends of the top upper and lower surfaces of the support frame 3. Two main luffing winches 6 are symmetrically arranged on both sides of the bottom of the support frame 3. Two additional second pulley groups 5 are symmetrically arranged on both sides of the two first pulley groups 4 near the two second pulley groups 5. Two secondary luffing winches 7 are symmetrically arranged on both sides of the two main luffing winches 6 away from the movable boom component 2.

[0023] The boom component 2 includes a boom mounting base 201, with a boom 202 rotatably connected to the top of the boom mounting base 201, and the bottom of the boom mounting base 201 is fixedly connected to one end of the upper surface of the mounting base plate 1.

[0024] The support frame 3 includes an A-frame 301. Two support rods 302 are symmetrically fixedly connected to both ends of the bottom of the A-frame 301. The bottom of the A-frame 301 is fixedly connected to the other end of the upper surface of the mounting base plate 1. The A-frame 301 is inclined towards the end away from the movable arm component 2. The bottom of the two support rods 302 is fixedly connected to both sides of the upper surface of the mounting base plate 1. By setting two support rods 302, the A-frame 301 can be connected and fixed to the mounting base plate 1, further enhancing the structural strength and facilitating luffing operations.

[0025] The multiple first pulley groups 4 include multiple first mounting seats 401. Two first pressure blocks 402 are symmetrically and movably mounted on the top ends of the multiple first mounting seats 401 by screws. A first mounting shaft 403 is rotatably connected to the inner side of the first mounting seat 401. The bottom of the first mounting seat 401 is fixedly connected to the upper and lower top surfaces of the A-frame 301 and the upper surface of the boom 202. Two first limiting pins 404 are symmetrically fixedly connected to the radial sides of the first mounting shaft 403. Multiple first pulleys 405 are evenly spaced on the first mounting shaft 403. The multiple first pulleys 405 are axially slidably connected to the first mounting shaft 403 by the two first limiting pins 404. By setting two first pressure blocks 402, the first mounting shaft 403 can be quickly disassembled and removed for replacement and maintenance of the first pulleys 405, reducing the difficulty of replacement and maintenance.

[0026] The second pulley assembly 5 includes a second mounting base 501. Two second pressure blocks 502 are symmetrically and movably mounted on the top two ends of the second mounting base 501 by screws. A second mounting shaft 503 is rotatably connected to the inner side of the second mounting base 501. The bottom of the second mounting base 501 is fixedly connected to the upper surface of the boom 202. Two second limiting pins 504 are symmetrically and fixedly connected to the radial sides of the second mounting shaft 503. A plurality of second pulleys 505 are evenly spaced on the second mounting shaft 503. The plurality of second pulleys 505 are axially slidably connected to the second mounting shaft 503 by the two second limiting pins 504. The two second limiting pins 504 on both sides of the second mounting shaft 503 can lock the second pulleys 505 radially, which facilitates quick axial disassembly and assembly of the second pulleys 505 and reduces the difficulty of maintenance and replacement.

[0027] Working principle: When it is necessary to replace or maintain the first pulley 405 or the second pulley 505, the two first pressure blocks 402 and the two second pressure blocks 502 on the first mounting base 401 and the second mounting base 501 are removed, and the first mounting shaft 403 and the second mounting shaft 503 are taken out respectively. The first pulley 405 and the second pulley 505 are then pulled out axially from the first mounting shaft 403 and the second mounting shaft 503. The new first pulley 405 and the second pulley 505 are then aligned with the two first limit pins 404 and the two second limit pins 504 and inserted into the first mounting shaft 403 and the second mounting shaft 503 respectively. Finally, the first mounting shaft 403 and the second mounting shaft 503 are placed into the first mounting base 401 and the second mounting base 501 respectively. The two first pressure blocks 402 and the two second pressure blocks 502 are then fixedly connected to the first mounting base 401 and the second mounting base 501 respectively, thereby pressing the first mounting shaft 403 and the second mounting shaft 503 to complete the installation.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel luffing rope arrangement for a marine crane, characterized in that: The system includes a mounting base plate (1), on one end of the upper surface of the mounting base plate (1) a movable arm component (2), and on the other end of the upper surface of the mounting base plate (1) a support frame (3) inclined thereon. Two first pulley groups (4) are symmetrically arranged on both sides of the upper surface of the movable arm component (2) away from the mounting base plate (1), and two second pulley groups (5) are symmetrically arranged on both sides of the other end of the upper surface of the movable arm component (2). Four first pulley groups (4) are symmetrically arranged at both ends of the top and bottom surfaces of the support frame (3). Two main luffing winches (6) are symmetrically arranged on both sides of the bottom of the support frame (3). Two other second pulley groups (5) are symmetrically arranged on both sides of the two first pulley groups (4) near the two second pulley groups (5). Two secondary luffing winches (7) are symmetrically arranged on both sides of the two main luffing winches (6) away from the movable arm component (2).

2. The novel luffing rope arrangement for a marine crane according to claim 1, characterized in that: The movable arm component (2) includes a boom mounting base (201), the top of which is rotatably connected to a boom (202), and the bottom of the boom mounting base (201) is fixedly connected to one end of the upper surface of the mounting base plate (1).

3. The novel luffing rope arrangement for a marine crane according to claim 2, characterized in that: The support frame (3) includes an A-frame (301), with two support rods (302) symmetrically fixedly connected at both ends of the bottom of the A-frame (301). The bottom of the A-frame (301) is fixedly connected to the other end of the upper surface of the mounting base plate (1), and the A-frame (301) is inclined towards the end away from the movable arm component (2). The bottoms of the two support rods (302) are fixedly connected to both sides of the upper surface of the mounting base plate (1).

4. A novel luffing rope arrangement for a marine crane according to claim 3, characterized in that: The plurality of first pulley groups (4) include a plurality of first mounting seats (401). Two first pressure blocks (402) are symmetrically and movably mounted on the top ends of the plurality of first mounting seats (401) by screws. A first mounting shaft (403) is rotatably connected to the inner side of the first mounting seat (401). The bottom of the first mounting seat (401) is fixedly connected to the top upper and lower surfaces of the A-frame (301) and the upper surface of the boom (202). Two first limiting pins (404) are symmetrically fixedly connected to the radial sides of the first mounting shaft (403). A plurality of first pulleys (405) are evenly spaced on the first mounting shaft (403). The plurality of first pulleys (405) are axially slidably connected to the first mounting shaft (403) by the two first limiting pins (404).

5. A novel luffing rope arrangement for a marine crane according to claim 2, characterized in that: The second pulley assembly (5) includes a second mounting base (501). Two second pressure blocks (502) are symmetrically and movably mounted on the top two ends of the second mounting base (501) by screws. A second mounting shaft (503) is rotatably connected to the inner side of the second mounting base (501). The bottom of the second mounting base (501) is fixedly connected to the upper surface of the boom (202). Two second limiting pins (504) are symmetrically and fixedly connected to the radial sides of the second mounting shaft (503). A plurality of second pulleys (505) are evenly spaced on the second mounting shaft (503). The plurality of second pulleys (505) are axially slidably connected to the second mounting shaft (503) by two second limiting pins (504).

6. A novel luffing rope arrangement for a marine crane according to claim 3, characterized in that: The two main luffing winches (6) include two main motor bases (601), and main winches (602) are rotatably connected to the inner sides of the two main motor bases (601). A main motor (603) is fixedly connected to one side of the main motor base (601). The bottom of the main motor base (601) is fixedly connected to the upper surface of the mounting base plate (1). A main wire rope (604) is fixedly connected to the inner side of the main winch (602). The output end of the main motor (603) passes through the main motor base (601) and is fixedly connected to one end of the main winch (602). The other end of the main wire rope (604) is interlocked with the first pulley group (4) on the lower surface of the top of the A-frame (301) and the two second pulley groups (5) on the same side of the upper surface of the boom (202). The other end of the main wire rope (604) is fixedly connected to the top of the A-frame (301).

7. A novel luffing rope arrangement for a marine crane according to claim 3, characterized in that: The two luffing winches (7) include two motor bases (701), and a winch (702) is rotatably connected to the inner side of each motor base (701). A motor (703) is fixedly connected to one side of the motor base (701). The bottom of the motor base (701) is fixedly connected to the upper surface of the mounting base plate (1). A wire rope (704) is fixedly connected to the inner side of the winch (702). The output end of the motor (703) passes through the motor base (701) and is fixedly connected to one end of the winch (702). The other end of the wire rope (704) is interlocked with the first pulley group (4) on the top surface of the A-frame (301) and the first pulley group (4) on the top surface of the boom (202). The other end of the wire rope (704) is fixedly connected to the top of the A-frame (301).

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