CN116374849A

CN116374849A - Crane for port operation

Info

Publication number: CN116374849A
Application number: CN202310618464.8A
Authority: CN
Inventors: 赵伟丽; 陈为亮; 张�杰; 齐斌; 尹可晖; 焦广勇; 马学旭; 陶祥根; 王鹤; 徐睿
Original assignee: Qianwan Port Area Branch Of Qingdao Port International Co ltd; Qingdao Port International Co Ltd
Current assignee: Qianwan Port Area Branch Of Qingdao Port International Co ltd; Qingdao Port International Co Ltd
Priority date: 2023-05-30
Filing date: 2023-05-30
Publication date: 2023-07-04

Abstract

The invention relates to the technical field of cranes and discloses a crane for harbour operation, which comprises a main beam, wherein the upper surface of the main beam is provided with a slideway groove, the inside of the slideway groove is connected with a slipway in a sliding way, the outside of the slipway is provided with a trolley component for driving the slipway to move, the outside of the slipway is fixedly connected with a first driving motor, the outside of an output shaft of the first driving motor is fixedly sleeved with a wire cylinder, the inside of the wire cylinder is fixedly connected with a first steel wire rope, one end of the first steel wire rope, which is far away from the wire cylinder, is fixedly connected with a hanging table, the lower end of the hanging table is fixedly connected with a lifting hook, the outside of the first steel wire rope is provided with a supporting component and a stable supporting component, when the goods are lifted by the lifting hook, the lifting hook drives the second steel wire rope to shrink to pull the two sides of the upper end of the hanging table, and at the moment, the second steel wire rope on the two sides apply upward triangular supporting force to the hanging table, so that the shaking condition after the goods are lifted by the hanging table is reduced, and the stability of the goods transportation is improved.

Description

Crane for port operation

Technical Field

The invention relates to the technical field of cranes, in particular to a crane for port operation.

Background

The portal crane is used for loading and unloading large cargoes, is often used for loading and unloading cargoes such as a storage yard, bulk cargos of a port wharf, a heavy cabinet container and the like, is like a portal frame, two supporting legs are arranged under a bearing girder, can directly walk on a track on the ground, is provided with a lifting trolley and is provided with a lifting hook, the crane lifts and transports cargoes through the lifting hook, the cargoes have large weight, the lifting hook is fixed by adopting only one steel wire rope, and the cargoes are easy to shake when the lifting hook drives the cargoes to lift, so that the cargoes are easy to fall off.

Disclosure of Invention

(one) solving the technical problems

Aiming at the defects of the prior art, the invention provides a crane for port operation.

(II) technical scheme

The invention provides the following technical scheme: the utility model provides a hoist for harbour operation, including the girder, the equal fixedly connected with in both sides of girder lower surface two frame girders, one side that every two frame girders kept away from the girder is equal fixed mounting has the slide, the slide groove has been seted up to the upper surface of girder, the inside in slide groove is equipped with the opening with the outside below intercommunication of girder, the inside sliding connection in slide groove has the slip table, the upper surface of slip table is established to the opening form, the outside of slip table is provided with the dolly subassembly that is used for driving the slip table and removes, the outside fixedly connected with first driving motor of slip table, the inside that first driving motor's output shaft activity runs through the slip table and will get into the slip table, the outside fixed wire section of thick bamboo that has cup jointed of output shaft of first driving motor, the inside fixedly connected with of wire rope of wire section of thick bamboo, first wire rope twines inside and passes the slide groove and extend to the girder below, the one end fixedly connected with hanging table of the outside wire rope of wire section of thick bamboo, the lower extreme fixedly connected with lifting hook of hanging table, the outside of first wire rope is provided with the supporting component and the stable supporting component that is used for improving lifting stability, the outside of wire section of thick bamboo is provided with and stable supporting component and carries out driven linkage assembly.

Preferably, the dolly subassembly is including second driving motor, mobile station and removal tooth's socket, mobile station fixed connection is kept away from one side of first driving motor in the slip table outside, second driving motor fixed connection is in the outside of mobile station, one side that the mobile station is close to the girder surface is established to hollow form, second driving motor output shaft activity runs through and gets into the hollow department of mobile station, the outside fixed tooth that turns that has cup jointed of output shaft of second driving motor, the one side that the mobile station is close to at the girder is seted up to the removal tooth's socket, turn the inside that the tooth meshing is connected at the removal tooth's socket.

Preferably, the support assembly comprises a support table and two connecting plates, wherein the two connecting plates are fixedly connected to one side, close to the sliding table, of the support table, the support table is connected to the lower surface of the main beam in a sliding manner through the connecting plates, and the support table is movably sleeved outside the first steel wire rope.

Preferably, the support assembly further comprises a rotating wheel, a fixing table and a lower notch, the lower notch is formed in one side of the main beam, which is close to the supporting table, the fixing table is fixedly connected to one side of the supporting table, which is close to the main beam, the fixing table is U-shaped, the rotating wheel is connected to the inside of the fixing table through rotation of a rotating shaft, and the rotating wheel is connected to the inside of the lower notch in a rotating mode.

Preferably, the quantity of stable supporting component sets up to two, and two stable supporting component set up respectively in the both sides of supporting bench lower surface, and every stable supporting component is all including two fixed plates, and two fixed plates are fixed connection respectively in the both sides of supporting bench lower surface, and one side that two fixed plates are close to mutually rotates and is connected with the axis, and centraxonial outside is fixed to have cup jointed the rotary drum, and the surface fixedly connected with second wire rope of rotary drum, second wire rope winding are in the outside of rotary drum, and the one end fixed connection that the rotary drum was kept away from to the second wire rope is in the outside of hanging the platform.

Preferably, the inside of the fixed plate on one side is provided with an inner groove, one end of the central shaft movably penetrates through the fixed plate on one side and extends to the inside of the inner groove, the outside of the central shaft is fixedly sleeved with a sleeve tooth, the outside of the sleeve tooth is connected with a connecting tooth in a meshed manner, the inside of the connecting tooth is fixedly connected with a circular shaft, and two ends of the circular shaft are respectively connected to two sides of the inner wall of the inner groove in a rotating manner.

Preferably, the linkage assembly comprises an inner cavity, a first rotating roller, a first driving belt, a second rotating roller and a second driving belt, wherein the inner cavity is formed in the supporting table, two ends of the first rotating roller are respectively connected with two sides of the inner wall of the inner cavity in a rotating mode, two sides of the inner portion of the second driving belt are respectively movably sleeved on the outer portions of the first rotating roller and an output shaft of the first driving motor, and the second driving belt drives the second driving belt to rotate through the output shaft of the first driving motor.

Preferably, the number of the second rotating rollers is two, the two second rotating rollers are respectively connected to two sides of the inner cavity in a rotating mode, the first transmission belt is movably sleeved on the outer portions of the two second rotating rollers, and the second rotating rollers are in meshed connection with the connecting teeth.

Preferably, the outer part of the fixed plate is provided with a steering assembly for supporting the rotary drum, the steering assembly comprises a steering plate, the steering plate is fixedly connected with the outer part of the fixed plate, the lower surface of the steering plate is fixedly connected with a short plate, a wire slot is formed in the short plate, and a second steel wire rope movably penetrates through the wire slot and extends to be fixed with the outer part of the hanging table;

the inner wall of wire casing has been seted up the kerve, the side tank has all been seted up to the both sides of kerve inner wall, sliding connection has the sleeve shaft between two side tanks, the outside activity of sleeve shaft has cup jointed the change gear, the change gear passes through sleeve shaft rotation and connects the inside at the wire casing, and second wire rope overlap joint is at the surface of change gear, the picture peg has all been cup jointed in the activity of sleeve shaft outside both sides, picture peg sliding connection is in the inside of side tank, the lower extreme fixedly connected with spring of picture peg, the one end fixed connection at the inner wall of side tank is kept away from to the spring.

(III) beneficial effects

Compared with the prior art, the invention provides a crane for port operation, which has the following beneficial effects:

1. this a hoist for harbour operation, when lifting up the goods through the lifting hook, first driving motor drive wire drum makes first wire rope shrink and upwards lifts up the transportation with the goods, when the lifting hook drives the goods and rises, the second drive belt drives the axis transmission in step, and drive the both sides of second wire rope shrink with the hoist table upper end through the rotary drum and stimulate, exert ascending triangle holding power to the hoist table through the second wire rope of both sides this moment, can improve the stability performance of hoist table and lifting hook when pulling the goods and rise, reduce the condition that the hoist table area goods risees back and rocks, the stability of goods transportation has been improved.

2. This a hoist for harbour operation, through control first driving motor drive line section of thick bamboo rotates and will hang platform and lifting hook and transfer, will hang the lifting hook and transfer to the goods top and lift up the goods, the output shaft of first driving motor drives the second drive belt in step and carries out synchronous drive when line section of thick bamboo rotates, the second drive belt rotates and drives first rotating roller and make first drive belt rotate, first drive belt drives the connecting tooth and makes the cover tooth drive the axis and rotate, the axis rotates and makes the second wire rope follow first wire rope in step and carry out decurrent extension, at this moment, the both sides of hanging platform and lifting hook are received the pulling support of both sides second wire rope respectively when moving downwards, cooperation first wire rope pulls the center of hanging platform, reach the effect of stabilizing and transferring hanging platform and lifting hook.

3. This a hoist for harbour operation through lifting up the goods after, can transfer the mobile station with the second driving motor start and make the slip table carry out lateral shifting in the inside of slipway groove, make the goods follow the slip table and carry out lateral shifting transportation, the second driving motor drives and changes the tooth and make it at the inside rotation of removal tooth's socket and drive mobile station at girder upper surface lateral shifting via the meshing transmission, drive the brace table when the slip table removes and make the inside of rotating the wheel at the notch slide down, apply the slip location of below to the slip table via the brace table, the steady performance when having improved the slip table and moving.

4. This a hoist for harbour operation, when following first wire rope through with second wire rope and carrying out downwardly extending, second wire rope moves about in the inside of wire casing when following first wire rope and extends, and the redirection to second wire rope makes second wire rope can keep supporting the hoist table in the top of hoist table through the wire casing, has guaranteed to provide ascending stable support performance for the hoist table.

5. This a hoist for harbour operation through setting up change gear cooperation spring, when second wire rope moves in the wire casing, and second wire rope moves and drives change gear and rotate in the wire casing at the outward appearance of change gear, alleviates the frictional resistance that second wire rope removed the production in the wire casing via change gear's rotation, simultaneously provides ascending elasticity for the picture peg to the sleeve through the spring, makes sleeve drive change gear and second wire rope contact, avoids second wire rope to break away from the condition of change gear outward appearance, has guaranteed the continuous contact of second wire rope and change gear, reaches the stability that improves second wire rope and remove.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the structure of the support table of FIG. 1 according to the present invention;

FIG. 3 is a schematic view of the bottom structure of the support table of FIG. 2 according to the present invention;

FIG. 4 is a schematic view of a partial cross-sectional structure of the support table of FIG. 1 in accordance with the present invention;

FIG. 5 is a schematic view of the steering plate of FIG. 3 according to the present invention;

fig. 6 is a partial bottom view of the main beam of fig. 1 according to the present invention.

In the figure: 1. a main beam; 11. erecting a beam; 12. a slide; 13. a first wire rope; 14. a slideway slot; 15. a lifting hook; 16. a sliding table; 17. a first driving motor; 18. a wire barrel; 19. a hanging platform; 2. a trolley assembly; 21. a second driving motor; 22. a mobile station; 23. moving the tooth slot; 24. rotating teeth; 3. a support assembly; 31. a support table; 32. a connecting plate; 33. a rotating wheel; 34. a fixed table; 35. a lower notch; 4. a stabilizing support assembly; 41. a fixing plate; 42. a rotating drum; 43. a second wire rope; 44. an inner tank; 45. a center shaft; 46. sleeving teeth; 47. a connecting tooth; 48. a circular shaft; 5. a steering assembly; 51. a steering plate; 52. a short plate; 53. a wire slot; 54. a side groove; 55. a bottom groove; 56. inserting plate; 57. a wire hanging wheel; 58. a sleeve shaft; 59. a spring; 7. a linkage assembly; 71. an inner cavity; 72. a first rotating roller; 73. a first belt; 74. a second rotating roller; 75. and a second belt.

Detailed Description

The present invention will be described in further detail below with reference to the drawings, wherein like elements are designated by like reference numerals, and it is noted that the words "front", "rear", "left", "right", "upper" and "lower", "bottom" and "top" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular element.

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-6, the present invention provides a technical solution: the utility model provides a hoist for harbour operation, including girder 1, the equal fixedly connected with of both sides of girder 1 lower surface is two frame girders 11, the equal fixed mounting in one side that every two frame girders 11 kept away from girder 1 has slide 12, slide groove 14 has been seted up to girder 1's upper surface, slide groove 14's inside is equipped with the opening with the outside below intercommunication of girder 1, slide groove 14's inside sliding connection has slipway 16, slipway 16's upper surface is established to the opening form, slipway 16's outside is provided with the dolly subassembly 2 that is used for driving slipway 16 and removes, slipway 16's outside fixedly connected with first driving motor 17, the output shaft activity of first driving motor 17 runs through slipway 16 and will get into slipway 16's inside, the outside fixed sleeve joint wire section of thick bamboo 18 of output shaft of first driving motor 17, wire section of thick bamboo 18's inside fixedly connected with first wire rope 13, first wire rope 13 is twined inside wire section of thick bamboo 18 and is passed slide groove 14 and is extended to girder 1 below, wire barrel 18's one end fixedly connected with platform 19, platform 19's lower extreme fixedly connected with lifting hook 15, lifting hook 13's outside is provided with lifting hook 15, lifting hook 13's outside is used for driving assembly 3 and is provided with stable supporting assembly of lifting hook 4 and is stable with the outside of supporting assembly, stable transmission of supporting assembly 4.

The trolley component 2 comprises a second driving motor 21, a moving table 22 and a moving tooth slot 23, wherein the moving table 22 is fixedly connected to one side, away from the first driving motor 17, of the outer portion of the sliding table 16, the second driving motor 21 is fixedly connected to the outer portion of the moving table 22, one side, close to the surface of the main beam 1, of the moving table 22 is hollow, an output shaft of the second driving motor 21 movably penetrates through and enters the hollow portion of the moving table 22, rotating teeth 24 are fixedly sleeved on the outer portion of the output shaft of the second driving motor 21, the moving tooth slot 23 is formed in one side, close to the moving table 22, of the main beam 1, and the rotating teeth 24 are connected to the inner portion of the moving tooth slot 23 in a meshed mode.

The supporting component 3 comprises a supporting table 31 and two connecting plates 32, wherein the two connecting plates 32 are fixedly connected to one side, close to the sliding table 16, of the supporting table 31, the supporting table 31 is slidably connected to the lower surface of the main beam 1 through the connecting plates 32, the supporting table 31 is movably sleeved outside the first steel wire rope 13, the supporting component 3 further comprises a rotating wheel 33, a fixing table 34 and a lower notch 35, the lower notch 35 is formed in one side, close to the supporting table 31, of the main beam 1, the fixing table 34 is fixedly connected to one side, close to the main beam 1, of the supporting table 31, the fixing table 34 is U-shaped, the inside of the fixing table 34 is rotatably connected with a rotating wheel 33 through a rotating shaft, and the rotating wheel 33 is rotatably connected to the inside of the lower notch 35.

The number of the stable supporting components 4 is two, the two stable supporting components 4 are respectively arranged on two sides of the lower surface of the supporting table 31, each stable supporting component 4 comprises two fixing plates 41, the two fixing plates 41 are respectively and fixedly connected to two sides of the lower surface of the supporting table 31, one side, close to the two fixing plates 41, of each fixing plate is rotationally connected with a center shaft 45, a rotary drum 42 is fixedly sleeved on the outer portion of the center shaft 45, a second steel wire rope 43 is fixedly connected to the outer surface of the rotary drum 42, one end, far away from the rotary drum 42, of each second steel wire rope 43 is fixedly connected to the outer portion of the hanging table 19, an inner groove 44 is formed in the fixing plate 41 on one side, one end of the center shaft 45 movably penetrates through the fixing plate 41 on one side and extends to the inner portion of the inner groove 44, a sleeve tooth 46 is fixedly sleeved on the outer portion of the center shaft 45, connecting teeth 47 are connected in a meshed mode, a round shaft 48 is fixedly connected to the inner portion of the connecting teeth 47, and two ends of the round shaft 48 are rotationally connected to two sides of the inner wall of the inner groove 44 respectively.

The outside of fixed plate 41 sets up the steering assembly 5 that is used for supporting rotary drum 42, steering assembly 5 is including steering plate 51, steering plate 51 fixed connection is in the outside of fixed plate 41, the lower surface fixedly connected with shortboard 52 of steering plate 51, the wire casing 53 has been seted up to the inside of shortboard 52, second wire rope 43 activity passes wire casing 53 and extends and hang the outside fixed of platform 19, the kerve 55 has been seted up to the inner wall of wire casing 53, the lateral groove 54 has all been seted up to the both sides of kerve 55 inner wall, sliding connection has sleeve 58 between two lateral grooves 54, the outside activity of sleeve 58 has cup jointed change gear 57, change gear 57 passes through sleeve 58 rotation to be connected in the inside of wire casing 53, and second wire rope 43 overlap joint is at the surface of change gear 57, the both sides outside of sleeve 58 have all movably cup jointed picture peg 56, picture peg 56 sliding connection is in the inside of lateral groove 54, the lower extreme fixedly connected with spring 59 of picture peg 56, the one end fixedly connected with of spring 59 keeping away from picture peg 56 is in the inner wall of lateral groove 54.

The linkage assembly 7 comprises an inner cavity 71, a first rotating roller 72, a first driving belt 73, a second rotating roller 74 and a second driving belt 75, wherein the inner cavity 71 is arranged in the supporting table 31, two ends of the first rotating roller 72 are respectively and rotatably connected to two sides of the inner wall of the inner cavity 71, two sides of the inner portion of the second driving belt 75 are respectively and movably sleeved on the outer portions of the first rotating roller 72 and the output shaft of the first driving motor 17, the second driving belt 75 is driven to rotate by the output shaft of the first driving motor 17, the number of the second rotating rollers 74 is two, the two second rotating rollers 74 are respectively and rotatably connected to two sides of the inner portion of the inner cavity 71, the first driving belt 73 is movably sleeved on the outer portions of the two second rotating rollers 74, and the second rotating rollers 74 are in meshed connection with the connecting teeth 47.

In the course of the use of the device,

in the first step, the first driving motor 17 is controlled to drive the wire drum 18 to rotate and lower the lifting platform 19 and the lifting hook 15, the lifting hook 15 is lowered to the position above the cargo and lifts the cargo, when the wire drum 18 rotates, the output shaft of the first driving motor 17 synchronously drives the second driving belt 75 to synchronously drive, the second driving belt 75 rotates to drive the first rotating roller 72 and enable the first driving belt 73 to rotate, the first driving belt 73 drives the connecting teeth 47 and enables the sleeve teeth 46 to drive the middle shaft 45 to rotate, the middle shaft 45 rotates and simultaneously drives the rotating drum 42 to rotate and enables the second steel wire rope 43 to synchronously follow the first steel wire rope 13 to extend downwards, at the moment, when the lifting platform 19 and the lifting hook 15 move downwards, both sides of the lifting platform 19 are respectively supported by the pulling of the second steel wire ropes 43 on both sides, and the center of the lifting platform 19 is pulled by the cooperation with the first steel wire rope 13, so that the effect of stably lowering the lifting platform 19 and the lifting hook 15 is achieved.

In the second step, when the cargo is lifted by the lifting hook 15, the first driving motor 17 drives the wire cylinder 18 to shrink the first steel wire rope 13 and lift the cargo upwards for transportation, when the lifting hook 15 drives the cargo to lift, the second driving belt 75 synchronously drives the middle shaft 45 to drive, and drives the second steel wire rope 43 to shrink through the rotary cylinder 42 to pull two sides of the upper end of the lifting platform 19, and at the moment, an upward triangular supporting force is applied to the lifting platform 19 through the second steel wire ropes 43 on two sides, so that the stability of the lifting platform 19 and the lifting hook 15 when the cargo is pulled to lift can be improved, the shaking condition of the lifting platform 19 after the cargo is lifted is reduced, and the stability of the cargo transportation is improved.

Third, after the goods are lifted, the second driving motor 21 is started to mobilize the moving table 22 and enable the sliding table 16 to transversely move in the sliding way groove 14, so that the goods can transversely move and transport along with the sliding table 16, the second driving motor 21 drives the rotating teeth 24 to rotate in the moving tooth grooves 23 and drive the moving table 22 to transversely move on the upper surface of the main beam 1 through meshing transmission, the supporting table 31 is driven to enable the rotating wheels 33 to slide in the lower notch 35 while the sliding table 16 moves, and the sliding positioning below the sliding table 16 is applied through the supporting table 31, so that the stability of the sliding table 16 during moving is improved.

Although embodiments of the present 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 therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hoist for harbour operation, includes girder (1), two equal fixedly connected with frame roof beam (11) in both sides of girder (1) lower surface, and one side that girder (1) was kept away from to every two frame roof beams (11) is equal fixed mounting has slide (12), its characterized in that: the upper surface of girder (1) has seted up slide groove (14), the inside in slide groove (14) is equipped with the opening with girder (1) outside below intercommunication, the inside sliding connection in slide groove (14) has slip table (16), the upper surface of slip table (16) is established to the opening form, the outside of slip table (16) is provided with dolly subassembly (2) that are used for driving slip table (16) and remove, the outside fixedly connected with first driving motor (17) of slip table (16), the output shaft activity of first driving motor (17) runs through slip table (16) and will get into the inside of slip table (16), the outside fixed cover of output shaft of first driving motor (17) has a wire section of thick bamboo (18), the inside fixedly connected with first wire rope (13) of wire section of thick bamboo (18), the inside sliding connection of wire rope (13) twine wire section of thick bamboo (18) and pass slide groove (14) and extend to girder (1) below, the one end fixedly connected with hanging table (19) of wire rope (13) keeping away from wire section of thick bamboo (18), the lower extreme fixedly connected with lifting hook (15) of hanging table (19), the outside fixedly connected with lifting hook (15) of lifting hook (13) is used for improving stability of lifting hook (4) and outside supporting component (4), the outside of the wire barrel (18) is provided with a linkage assembly (7) which is in transmission with the stable supporting assembly (4).

2. A crane for port operations according to claim 1, characterized in that: the trolley assembly (2) comprises a second driving motor (21), a moving table (22) and a moving tooth groove (23), wherein the moving table (22) is fixedly connected to one side, away from the first driving motor (17), of the outer portion of the sliding table (16), the second driving motor (21) is fixedly connected to the outer portion of the moving table (22), one side, close to the surface of the main beam (1), of the moving table (22) is arranged to be hollow, an output shaft of the second driving motor (21) movably penetrates through and enters the hollow portion of the moving table (22), rotary teeth (24) are fixedly sleeved on the outer portion of the output shaft of the second driving motor (21), the moving tooth groove (23) is formed in one side, close to the moving table (22), of the main beam (1), and the rotary teeth (24) are connected to the inner portion of the moving tooth groove (23) in a meshed mode.

3. A crane for port operations according to claim 1, characterized in that: the supporting assembly (3) comprises supporting tables (31) and connecting plates (32), the number of the connecting plates (32) is two, the two connecting plates (32) are fixedly connected to one side, close to the sliding table (16), of the supporting table (31), the supporting table (31) is connected to the lower surface of the main beam (1) in a sliding mode through the connecting plates (32), and the supporting tables (31) are movably sleeved outside the first steel wire rope (13).

4. A crane for port operations according to claim 3, characterized in that: the support assembly (3) further comprises a rotating wheel (33), a fixing table (34) and a lower notch (35), the lower notch (35) is formed in one side, close to the support table (31), of the main beam (1), the fixing table (34) is fixedly connected to one side, close to the main beam (1), of the support table (31), the fixing table (34) is U-shaped, the rotating wheel (33) is connected to the inside of the fixing table (34) through rotation of a rotating shaft, and the rotating wheel (33) is connected to the inside of the lower notch (35) in a rotating mode.

5. A crane for port operations according to claim 1 or 3, characterized in that: the quantity of stable supporting component (4) sets up to two, two stable supporting component (4) set up the both sides at supporting bench (31) lower surface respectively, every stable supporting component (4) all is including two fixed plates (41), two fixed plates (41) are fixed connection respectively in the both sides of supporting bench (31) lower surface, one side that two fixed plates (41) are close to rotates and is connected with axis (45), the outside fixed sleeve of axis (45) has rotary drum (42), the surface fixedly connected with second wire rope (43) of rotary drum (42), the outside at rotary drum (42) is twined to second wire rope (43), the one end fixed connection outside at hanging table (19) of rotary drum (42) is kept away from to second wire rope (43).

6. A crane for port operations according to claim 5, characterized in that: an inner groove (44) is formed in the fixing plate (41) on one side, one end of a center shaft (45) movably penetrates through the fixing plate (41) on one side and extends to the inner part of the inner groove (44), a sleeve tooth (46) is fixedly sleeved outside the center shaft (45), a connecting tooth (47) is connected with the outer part of the sleeve tooth (46) in a meshed mode, a circular shaft (48) is fixedly connected to the inner part of the connecting tooth (47), and two ends of the circular shaft (48) are respectively connected to two sides of the inner wall of the inner groove (44) in a rotating mode.

7. A crane for port operations according to claim 1 or 3, characterized in that: the linkage assembly (7) comprises an inner cavity (71), a first rotating roller (72), a first driving belt (73), a second rotating roller (74) and a second driving belt (75), wherein the inner cavity (71) is formed in the supporting table (31), two ends of the first rotating roller (72) are respectively connected to two sides of the inner wall of the inner cavity (71) in a rotating mode, two sides of the inner portion of the second driving belt (75) are respectively movably sleeved on the outer portions of the first rotating roller (72) and an output shaft of the first driving motor (17), and the second driving belt (75) is driven to rotate through the output shaft of the first driving motor (17).

8. A crane for port operations according to claim 7, characterized in that: the number of the second rotating rollers (74) is two, the two second rotating rollers (74) are respectively connected to two sides of the inner cavity (71) in a rotating mode, the first transmission belt (73) is movably sleeved outside the two second rotating rollers (74), and the second rotating rollers (74) are in meshed connection with the connecting teeth (47).

9. A crane for port operations according to claim 6, characterized in that: the outside of the fixed plate (41) is provided with a steering assembly (5) for supporting the rotary drum (42), the steering assembly (5) comprises a steering plate (51), the steering plate (51) is fixedly connected to the outside of the fixed plate (41), the lower surface of the steering plate (51) is fixedly connected with a short plate (52), the inside of the short plate (52) is provided with a wire slot (53), and a second wire rope (43) movably penetrates through the wire slot (53) and extends to be fixed with the outside of the hanging table (19);

a bottom groove (55) is formed in the inner wall of the wire groove (53), side grooves (54) are formed in the two sides of the inner wall of the bottom groove (55), a sleeve shaft (58) is connected between the two side grooves (54) in a sliding mode, a change gear (57) is movably sleeved outside the sleeve shaft (58), the change gear (57) is rotatably connected inside the wire groove (53) through the sleeve shaft (58), a second steel wire rope (43) is lapped on the outer surface of the change gear (57), inserting plates (56) are movably sleeved on the two sides of the outer portion of the sleeve shaft (58), the inserting plates (56) are slidably connected inside the side grooves (54), springs (59) are fixedly connected to the lower ends of the inserting plates (56), and one ends of the springs (59) away from the inserting plates (56) are fixedly connected with the inner wall of the side grooves (54).