CN113135487B

CN113135487B - Wharf crane

Info

Publication number: CN113135487B
Application number: CN202110466806.XA
Authority: CN
Inventors: 康顺; 康椒; 魏心志; 王磊
Original assignee: Ningbo Juda Heavy Industry Machinery Co ltd
Current assignee: Ningbo Juda Heavy Industry Machinery Co ltd
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-16
Anticipated expiration: 2041-04-28
Also published as: CN113135487A

Abstract

The application relates to a wharf crane, which comprises a crane main body and a lifting appliance installed on the crane main body; the lifting appliance comprises a lifting support, a fixed lifting unit arranged at the bottom of the lifting support and a movable lifting unit which is vertically and slidably arranged on the lifting support and is positioned above the fixed lifting unit; the fixed hoisting unit comprises a fixed frame and two groups of fixed clamping mechanisms which are oppositely arranged on the fixed frame and used for clamping the container; the fixing frame is provided with a fixing through hole for the container to pass through; the movable hoisting unit comprises a movable frame and two groups of movable clamping mechanisms which are oppositely arranged on the movable frame and used for clamping the container. This application has the effect of the efficiency of promotion pier hoist and mount container.

Description

Wharf crane

Technical Field

The application relates to the field of cranes, in particular to a wharf crane.

Background

In ship transportation, containers are usually used for storing goods, and a quay crane is usually provided at a quay for unloading the containers in the ship. A conventional quay crane mainly includes a crane body and a spreader mounted on the crane body, and the spreader holds a container to complete the transfer of the container.

Chinese patent No. CN104176645B discloses a container crane, which comprises a first frame and a hanger, wherein the lower part of the hanger is provided with a plurality of connecting parts for cooperating with a container. The spreader has and can only hoist one container in one hoisting operation.

Referring to fig. 1, a schematic diagram of a conventional container 9 is shown. The container 9 is a hollow cuboid box body, the container 9 is provided with hoisting convex blocks 91 at two ends of two short edges of the top surface, and the hoisting convex blocks 91 are provided with first hoisting holes 92 in the length direction of the container 9 and towards the end surface of the outer side.

For the related technologies, the inventor thinks that along with the development of the crane industry, the weight that the crane 9 can hoist is continuously increased, and the container crane can hoist only one container 9 at a time, resulting in lower hoisting efficiency.

Disclosure of Invention

In order to promote the efficiency of pier crane hoist and mount container, this application provides a pier crane.

The application provides a pier crane adopts following technical scheme:

a wharf crane comprises a crane main body and a lifting appliance installed on the crane main body; the lifting appliance comprises a lifting support, a fixed lifting unit arranged at the bottom of the lifting support and a movable lifting unit which is vertically and slidably arranged on the lifting support and is positioned above the fixed lifting unit; the fixed hoisting unit comprises a fixed frame and two groups of fixed clamping mechanisms which are oppositely arranged on the fixed frame and used for clamping the container; the fixing frame is provided with a fixing through hole for the container to pass through; the movable hoisting unit comprises a movable frame and two groups of movable clamping mechanisms which are oppositely arranged on the movable frame and used for clamping the container.

Through adopting above-mentioned technical scheme, above-mentioned pier hoist can hoist two at least containers simultaneously, has improved the efficiency of pier hoist and mount container.

The steps of hoisting the container by the wharf crane are as follows: 1. the wharf crane moves the lifting appliance to be right above the container to be lifted; 2. clamping the container by adopting a movable hoisting unit; 3. and clamping the container by adopting the fixed hoisting unit. In the process that the first container is hoisted by the lifting appliance and a second container is to be hoisted, the first container can be placed at the top of the second container, and along with the lower part of the lifting appliance, the movable hoisting unit moves upwards relative to the hoisting support, so that the second container can be clamped by the movable hoisting unit or the fixed hoisting unit. The movable hoisting unit can clamp the container which is not positioned at the bottom, so that the stability of the container in the hoisting process is improved.

Optionally, the hoisting support comprises a hoisting platform and at least two main pillars vertically arranged on the hoisting platform; the main supporting columns comprise fixed supporting columns fixed on the hoisting platform and expansion supporting columns detachably mounted at the bottoms of the fixed supporting columns, the outer diameters of the fixed supporting columns and the outer diameters of the expansion supporting columns are consistent, and the number of the expansion supporting columns corresponds to the number of the movable hoisting units; the fixed hoisting unit can be arranged at the bottom of the fixed support column or the bottom of the expansion support column; the movable frame is provided with a guide sleeve matched with the main supporting column.

By adopting the technical scheme, the total column length of the hoisting support and the number of the movable hoisting units can be adjusted by the number of containers hoisted simultaneously by the hoisting tool according to needs, so that the wharf crane can be applied to more working occasions.

Optionally, the bottoms of the fixed strut and the expanded strut are both provided with mounting studs, and the top of the expanded strut is provided with mounting screw holes for mounting the mounting studs in a threaded manner; the fixing frame is provided with a mounting through hole for inserting a mounting stud, the aperture of the mounting screw hole is smaller than the outer diameter of the fixing support, and the mounting stud is also provided with a mounting nut which is abutted against the bottom of the fixing frame and used for locking the fixing frame on the hoisting support.

By adopting the technical scheme, the connection mode of the fixing support and the expansion support, the connection mode of the fixing support and the fixing frame and the connection mode of the expansion support and the fixing frame are disclosed, wherein the connection structure strength of the fixing support and the expansion support is high, so that the expansion support is not easy to fall off from the fixing support.

Optionally, an assembling device is further provided; the assembling device comprises an assembling bottom plate arranged on the ground, an assembling guide pillar vertically arranged on the top surface of the assembling bottom plate, an assembling platform vertically arranged on the assembling guide pillar in a sliding mode and used for placing the hoisting platform, a lifting mechanism driving the assembling platform to lift and an assembling mechanism arranged on the assembling bottom plate; the assembling platform is provided with a first through hole for the fixed support to pass through; the assembling mechanism comprises mounting seats which are rotatably mounted on the assembling bottom plate and correspond to the fixed supporting columns one by one, and driving components for driving the mounting seats to rotate; the top of the mounting seat is provided with a mounting blind hole for the mounting stud to be inserted into; the bottom of the mounting stud is provided with a regular hexagonal groove, and the bottom surface of the mounting blind hole is provided with a regular hexagonal convex part matched with the regular hexagonal groove.

By adopting the technical scheme, the expanding pillar can be installed on the hoisting support through the assembling device, and the steps of installing the expanding pillar by the assembling device are as follows: 1. the expanding pillar is mounted on the mounting seat, and the hexagonal convex part on the mounting seat is inserted into the hexagonal groove of the expanding pillar; 2. the crane body moves the lifting appliance to the upper part of the assembling device and lowers the lifting appliance, so that a lifting platform of the lifting appliance is placed on the top surface of the assembling platform, and the main support column penetrates through the first through hole; 3. the assembly platform moves downwards through the lifting mechanism, so that the bottom of the main strut is abutted against the upper edge of the mounting screw hole of the expansion strut on the mounting seat; 4. the driving assembly is started, the mounting base rotates towards the direction of locking the mounting screw hole and the mounting stud, the assembling platform is lowered through the lifting mechanism, the mounting platform can be supported at the bottom of the expanding pillar all the time, and the driving assembly and the lifting mechanism are closed until the mounting stud at the bottom of the main pillar is installed behind the mounting screw hole at the top of the expanding pillar in a threaded mode. The assembling device is convenient for installing the expansion strut on the general strut of the hoisting support, and improves the hoisting efficiency of the wharf crane.

Wherein, above-mentioned assembly device can also reverse start drive assembly for the mount pad rotates towards the direction of installation screw and installation double-screw bolt unblock, and makes the equipment platform shift up through elevating system, just can conveniently take off the expansion pillar in the main pillar on the hoisting support.

Optionally, the lifting mechanism includes a lifting platform vertically slidably mounted on the assembly guide pillar and located below the assembly platform, and a lifting hydraulic cylinder mounted on the top of the assembly bottom plate; a piston rod of the lifting hydraulic cylinder is vertically arranged and connected to the bottom of the lifting platform; the lifting platform is provided with second through holes which are in one-to-one correspondence with the first through holes and used for the fixed supporting columns to pass through, and adjusting springs are arranged between the lifting platform and the assembling platform.

Through adopting above-mentioned technical scheme, if directly connect hydraulic cylinder on equipment platform, can cause whole equipment to take place the damage because there is the error in drive assembly and hydraulic cylinder operation in-process simultaneously. Therefore, the lifting mechanism is provided, the lifting hydraulic cylinder is connected to the bottom of the lifting platform and directly drives the lifting platform to lift, and the adjusting spring is arranged between the lifting platform and the assembling platform, so that the lifting of the assembling platform can be buffered, and the damage of the assembling device caused by the error existing in the simultaneous operation process of the driving assembly and the lifting hydraulic cylinder is reduced.

Optionally, the driving assembly includes a mounting sprocket mounted outside the mounting seat, a driving chain connected to all the mounting sprockets, a driving sprocket adapted to the driving chain, and a driving motor driving the driving sprocket to rotate; the driving assembly can drive all the installation seats to rotate towards the same direction.

Through adopting above-mentioned technical scheme, disclosed actuating mechanism's concrete structure, driving motor can rotate towards same direction through all mount pads of drive chain drive, and all mount pads pivoted synchronization degree are comparatively ideal.

Optionally, the fixed frame and the movable frame are both provided with a buffer assembly at the top; the buffer assembly comprises a buffer base, a buffer top seat and a buffer spring arranged between the buffer base and the buffer top seat; the movable frame is also provided with a first buffer part for the buffer assembly below to abut against; the hoisting platform is provided with a second buffer part for abutting the buffer assembly below.

Through adopting above-mentioned technical scheme, help prescribing a limit to the distance between adjacent fixed frame and the movable frame, the distance between the adjacent movable frame to help protecting other parts on fixed hoist and mount unit and the activity hoist and mount unit.

When the container that the pier hoist will once need hoist and mount all hoists on the hoist, the last buffering subassembly of the movable frame of the top can the butt on hoisting platform's second buffer portion, not only to movable frame's spacing, but also cushion the movable frame who shifts up, has cushioned the impact between movable frame and the hoisting platform, helps prolonging movable support and hoisting platform's life.

Optionally, the first buffer part has a first buffer slot for inserting the buffer top seat.

By adopting the technical scheme, the lifting device is beneficial to facilitating the vertical stacking of the fixed lifting unit and the movable lifting unit.

Optionally, the fixed clamping mechanism comprises a first clamping cylinder and a first clamping plate mounted on a piston rod of the first clamping cylinder; the two ends of the end surface of the first clamping plate facing the container are provided with first clamping convex columns which are used for being inserted into the first hoisting holes; the movable clamping mechanism comprises a second clamping oil cylinder and a second clamping plate arranged on a piston rod of the second clamping oil cylinder; and second clamping convex columns which are used for being inserted into the first hoisting holes are arranged at two ends of the end surface of the second clamping plate facing the container.

Through adopting above-mentioned technical scheme, disclosed the structure that fixed clamping mechanism and activity were pressed from both sides the dress mechanism, and above-mentioned fixed clamping mechanism and activity press from both sides the dress mechanism and to the clamping effect of container comparatively ideal.

In summary, the present application includes at least one of the following beneficial technical effects:

1. a wharf crane comprises a lifting appliance, wherein the lifting appliance comprises a lifting support, a fixed lifting unit and a movable lifting unit, and can lift at least two containers at one time, so that the container lifting efficiency of the wharf crane is improved;

2. the length of the main supporting column and the number of the movable hoisting units can be adjusted by the hoisting tool according to the number of containers to be hoisted simultaneously, so that the application occasions of the wharf crane are improved;

3. by arranging the assembling device, the mounting and dismounting of the expansion strut on the hoisting support can be facilitated, so that the use efficiency of the wharf crane is improved;

4. through setting up the buffering subassembly, help keeping the distance between fixed frame and the movable frame to set up first dashpot through the bottom at first buffering portion, thereby stack fixed hoist and mount unit and activity hoist and mount unit from top to bottom conveniently.

Drawings

Fig. 1 is a schematic view of the mechanism of a prior art container.

Fig. 2 is a schematic structural view of a quay crane in the present application.

Fig. 3 is a schematic structural diagram of a spreader in the present application.

Fig. 4 is a schematic structural view of the overall strut in the present application.

Fig. 5 is a schematic structural view of a hoisting support and a fixed hoisting unit in the present application.

Figure 6 is an exploded view of the lifting bracket and the fixed lifting unit of the present application.

Fig. 7 is a schematic structural diagram of a movable hoisting unit in the present application.

Fig. 8 is a schematic structural view of a cushion assembly according to the present application.

Fig. 9 is a schematic bottom structure diagram of the movable hoisting unit in the present application.

Fig. 10 is a schematic view of the construction of the assembly device of the present application.

Fig. 11 is a schematic cross-sectional view of an assembly device according to the present application.

Fig. 12 is a schematic view of the assembly platform and mount of the present application in mating relationship.

Fig. 13 is a schematic structural view of an extension strut in the present application.

Description of reference numerals: 1. a crane body; 2. a spreader; 3. hoisting a support; 31. hoisting the platform; 32. a main strut; 321. fixing a strut; 3211. fixing the stud; 3212. fixing a nut; 322. expanding the pillars; 3221. mounting a screw hole; 323. mounting a stud; 3231. a regular hexagonal groove; 4. fixing the hoisting unit; 41. a fixed frame; 411. a fixing through hole; 412. mounting a through hole; 413. mounting a nut; 414. a first long frame; 415. a first short frame; 42. a first clamping cylinder; 43. a first clamping plate; 431. a first clamping convex column; 5. a movable hoisting unit; 51. a movable frame; 511. a movable through hole; 512. a guide sleeve; 5121. a guide hole; 513. a second long frame; 514. a second short frame; 52. a second clamping cylinder; 53. a second clamping plate; 531. a second clamping convex column; 61. a buffer base; 611. a first sleeve; 6111. a first chute; 62. a buffering top seat; 621. a first insert post; 6211. a first screw; 63. a buffer spring; 64. a first buffer section; 641. a first buffer tank; 65. a second buffer section; 66. a buffer jacket; 7. assembling the device; 71. assembling a bottom plate; 711. rotating the jack; 7111. a first hole; 7112. a second hole; 712. a rotating bearing; 713. a pressure bearing; 72. assembling a guide pillar; 73. assembling the platform; 731. a first through hole; 732. inserting a column upwards; 74. a lifting platform; 741. a second through hole; 742. inserting a column downwards; 75. a lifting hydraulic cylinder; 76. adjusting the spring; 77. placing holes; 81. a mounting seat; 811. installing blind holes; 812. rotating the inserted column; 82. a right hexagonal convex part; 83. mounting a chain wheel; 84. a drive chain; 85. a drive sprocket; 86. a drive motor; 9. a container; 91. hoisting the convex block; 92. the first lifting hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-13.

The embodiment of the application discloses a wharf crane. Referring to fig. 2, a quay crane mainly includes a crane body 1 and a spreader 2. The hoisting cable of the crane body 1 is installed on the lifting appliance 2 and controls the lifting appliance 2 to lift.

Referring to fig. 3, the lifting appliance 2 includes a lifting support 3, a fixed lifting unit 4 installed at the bottom of the lifting support 3, and a movable lifting unit 5 vertically slidably installed on the lifting support 3. In this embodiment, the number of the fixed hoisting units 4 is one, the number of the movable hoisting units 5 is two, and the two movable hoisting units 5 are arranged up and down.

Referring to fig. 3, the lifting bracket 3 comprises a lifting platform 31 and four general pillars 32. The hoisting platform 31 is a rectangular metal plate arranged horizontally. Four main pillars 32 are respectively fixed at four corners of the hoisting platform 31 and are vertically arranged.

Referring to fig. 3, the main strut 32 includes a fixed strut 321 and a plurality of expansion struts 322 from top to bottom. Wherein, the outer diameters of the fixed support columns 321 and the expanded support columns 322 are kept consistent, and the group number of the expanded support columns 322 is kept consistent with the number of the movable hoisting units 5. In this embodiment, the number of sets of expansion struts 322 is two.

Referring to fig. 3, a fixing stud 3211 is provided at the top of the fixing support 321. The hoisting platform 31 is provided with fixing holes penetrating through the upper and lower surfaces at four corners, and the aperture of the fixing hole is larger than that of the fixing stud 3211. The fixing stud 3211 is further provided with two fixing nuts 3212, and the two fixing nuts 3212 are respectively abutted to the upper and lower surfaces of the hoisting platform 31 to fix the fixing strut 321 on the hoisting platform 31.

Referring to fig. 4, the bottom of the fixed strut 321 and the bottom of the expanding strut 322 are each provided with a coaxially arranged mounting stud 323. The mounting studs 323 have an outer diameter less than the outer diameters of the fixed strut 321 and the expanding strut 322. An installation screw hole 3221 for mounting the installation stud 323 in a threaded manner is coaxially formed in the top end surface of the expansion strut 322, and the depth of the installation screw hole 3221 is greater than the length of the installation stud 323.

Referring to fig. 1 and 5, the fixed lifting unit 4 includes a fixed frame 41 and two sets of fixing clamping mechanisms oppositely installed on the fixed frame 41 and used for clamping the container 9.

The fixing frame 41 is a square frame and has a fixing through-hole 411 for passing the container 9. Wherein, the fixing through hole 411 is a square through hole.

Referring to fig. 5 and 6, the fixing frame 41 is provided at four corners with mounting through holes 412 through which mounting studs 323 pass. When the fixing frame 41 is installed on the hoisting support 3, the mounting stud 323 located at the bottommost end of the hoisting support 3 is inserted into the corresponding mounting through hole 412, and the mounting nut 413 is installed on the mounting stud 323, so that the mounting nut 413 abuts against the bottom surface of the fixing frame 41, thereby realizing the limit of the fixing frame 41 on the hoisting support 3 and preventing the fixing frame 41 from being separated from the hoisting support 3.

Referring to fig. 1 and 5, the fixing frame 41 includes two first long frames 414 and two first short frames 415. The two sets of fixing and clamping mechanisms are respectively mounted on the two first short frames 415 of the fixing frame 41. The fixing and clamping mechanism includes a first clamping cylinder 42 and a first clamping plate 43. The first clamping cylinder 42 is mounted on the outer side wall of the first short frame 415, and the piston rod of the first clamping cylinder 42 penetrates through the inner side wall and the outer side wall of the first short frame 415 and extends into the inner side of the fixed frame 41. The first clamping plate 43 is attached to the piston rod of the first clamping cylinder 42 and is located inside the fixed frame 41. The first clamping plate 43 is provided with first clamping bosses 431 at both ends of an end surface facing the container 9 for insertion into the first hoisting holes 92.

Referring to fig. 7, the movable hoisting unit 5 includes a movable frame 51 and two sets of movable clamping mechanisms oppositely mounted on the movable frame 51 and used for clamping the container 9.

Referring to fig. 1 and 7, the movable frame 51 is a square frame and has a movable through-hole 511 for passing the container 9. Wherein, the movable through hole 511 is a square through hole.

Referring to fig. 3 and 7, the movable frame 51 is mounted with guide sleeves 512 at four corners to be fitted with the main pillars 32. The guide sleeve 512 is vertically installed on the movable frame 51 and has a vertically arranged guide hole 5121.

The movable frame 51 includes two second long frames 513 and two second short frames 514. The two sets of movable clamping mechanisms are respectively arranged on the two second short frames 514 of the movable frame 51. The movable clamping mechanism includes a second clamping cylinder 52 and a second clamping plate 53. The second clamping cylinder 52 is mounted on the outer side wall of the second short frame 514, and the piston rod of the second clamping cylinder 52 penetrates through the inner and outer side walls of the second short frame 514 and extends into the inner side of the movable frame 51. The second clamp plate 53 is attached to the piston rod of the second clamp cylinder 52 and is located inside the movable frame 51. The second clamping plate 53 is provided with second clamping bosses 531 at both ends of an end surface facing the container 9 for insertion into the first hoisting holes 92.

Referring to fig. 3 and 8, the fixed frame 41 and the movable frame 51 are each provided with a buffer assembly at the top. The cushion assembly includes a cushion base 61, a cushion top 62, and a cushion spring 63 mounted between the cushion base 61 and the cushion top 62. A first sleeve 611 is vertically disposed at the center of the buffering base 61. The bottom of the cushion top 62 has a first plunger 621 that is vertically disposed and is capable of being inserted into the first sleeve 611. The first sleeve 611 is uniformly provided with two first sliding grooves 6111 in the circumferential direction of the outer sidewall, and the two first sliding grooves 6111 are both arranged in the vertical direction. The outer side wall of the first inserting column 621 is threadedly provided with a first screw 6211 which is in one-to-one correspondence with the first sliding slot 6111 in the two days and can slide in the first sliding slot 6111. The cushioning assembly further includes a cushioning outer cover 66 disposed outside of the cushioning base 61.

The movable frame 51 is further provided with a first buffer portion 64 against which a lower buffer assembly abuts.

Referring to fig. 9, the first buffer portion 64 is opened with a first buffer groove 641 for buffering the insertion of the top holder 62. In the present embodiment, the buffer member of the movable frame 51 is mounted on the top surface of the first buffer portion 64.

Referring to fig. 3, the hoisting platform 31 is provided with a second buffer 65 against which the lower buffer assembly abuts.

With reference to fig. 1 to 9, the quay crane can hoist three containers 9 simultaneously, so that the efficiency of the quay crane in hoisting the containers 9 is improved, and the specific hoisting process is as follows: 1. the quay crane moves the spreader 2 to be directly above the first container 9 to be hoisted; 2. the lower lifting appliance 2 enables the uppermost movable lifting unit 5 to be opposite to the top of the container 9, and the movable clamping mechanism is started, so that the second clamping convex columns 531 on the second clamping plates 53 are inserted into the first lifting holes 92 of the container 9, and the container 9 is lifted; 3. the quay crane moves the spreader 2 to be directly above a second container 9 to be hoisted; 4. the lower lifting appliance 2 enables the movable lifting unit 5 which is second from top to bottom to be opposite to the top of the container 9, and the movable clamping mechanism on the movable lifting unit 5 is started, so that the second clamping convex columns 531 on the second clamping plate 53 are inserted into the first lifting holes 92 of the container 9, and the lifting of the second container 9 is completed; 5. the wharf crane moves the lifting appliance 2 to the position right above the third container 9 to be lifted by the wharf crane; 4. and the lower lifting appliance 2 enables the fixed lifting unit 4 to be opposite to the top of the container 9, and the fixed clamping mechanism on the fixed lifting unit 4 is started, so that the first clamping convex columns 431 on the first clamping plates 43 are inserted into the first lifting holes 92 of the container 9, and the lifting of the third container 9 is completed.

With reference to fig. 3 and 10, the quay crane of the present application is further provided with an assembly device 7 for assembling the spreader 2 described above.

The assembling device 7 comprises an assembling bottom plate 71 installed on the ground, an assembling guide post 72 vertically installed on the top surface of the assembling bottom plate 71, an assembling platform 73 vertically slidably installed on the assembling guide post 72 and used for placing the hoisting platform 31, a lifting mechanism driving the assembling platform 73 to lift, and an assembling mechanism installed on the assembling bottom plate 71. In this embodiment, the assembly device 7 is provided with four assembly guide posts 72,

in order to avoid interference between the assembling guide post 72 and the lifting platform 31, the lifting platform 31 is provided with a through hole for the assembling guide post 72 to pass through.

The assembling platform 73 has first through holes 731 at four corners for the fixing posts 321 to pass through.

Referring to fig. 10 and 11, the lifting mechanism includes a lifting platform 74 vertically slidably mounted on the assembly guide post 72 and located below the assembly platform 73, and a lifting hydraulic cylinder 75 mounted on the assembly base plate 71. The hydraulic lift cylinder 75 is disposed vertically, and a piston rod of the hydraulic lift cylinder 75 is extended vertically upward and is fixedly connected to the bottom center of the lift platform 74. The lifting platform 74 is provided with second through holes 741, which are corresponding to the first through holes 731 one by one and are used for the fixing support 321 to pass through.

An upper inserting column 732 is vertically and downwardly arranged at the center of the bottom of the assembling platform 73, a lower inserting column 742 is vertically and upwardly arranged at the center of the top of the lifting platform 74, the lifting platform 74 and the assembling platform 73 are further provided with an adjusting spring 76, the top of the adjusting spring 76 is fixed on the outer side wall of the upper inserting column 732, and the bottom of the adjusting spring 76 is fixed on the outer side wall of the lower inserting column 742.

In order to control the height of the whole assembly platform 73, a placing hole 77 for the hydraulic cylinder 75 to be disposed is formed on the ground, the hydraulic cylinder 75 is installed in the placing hole 77, and a through hole for the hydraulic cylinder 75 to partially extend is formed on the assembly base plate 71.

Referring to fig. 10 and 12, the assembly mechanism includes a mounting seat 81 rotatably mounted on the assembly base plate 71 and corresponding to the fixing support posts 321 one by one, and a driving assembly for driving the mounting seat 81 to rotate. The assembly base plate 71 is provided with a rotary insertion hole 711 for rotatably installing the installation seat 81, and the rotary insertion hole 711 sequentially includes a first hole 7111 and a second hole 7112 from top to bottom. The bottom of the mount 81 has a rotary insert 812 inserted into the rotary insert hole 711. A rotating bearing 712 matched with the outer side wall of the rotating plug-in column 812 is arranged in the first hole 7111, and a pressure bearing 713 matched with the bottom of the rotating plug-in column 812 in an abutting mode is arranged in the second hole 7112.

Referring to fig. 4 and 13, a right hexagonal groove 3231 is formed at the bottom of the mounting stud 323, and a center of a cross section of the right hexagonal groove 3231 is located on an axis of the fixed pillar 321 or the extended pillar 322.

Referring to fig. 12 and 13, the top of the mounting seat 81 has a blind mounting hole 811 for inserting the mounting stud 323, and the mounting seat 81 is provided with a hexagonal protrusion 82 on the bottom surface of the blind mounting hole 811 for engaging with the hexagonal groove 3231. After mounting stud 323 is inserted into mounting blind hole 811, mounting stud 323 and mount 81 are circumferentially locked.

Referring to fig. 12 and 13, the driving assembly includes mounting sprockets 83 mounted outside the mounting seat 81, a driving chain 84 connecting all the mounting sprockets 83, a driving sprocket 85 fitted with the driving chain 84, and a driving motor 86 driving the driving sprocket 85 to rotate. The driving assembly can drive all the mounting seats 81 to rotate in the same direction.

Above-mentioned assembly device 7's setting can be conveniently to expand pillar 322 and install hoisting support 3 on, also conveniently dismantle expansion pillar 322 on hoisting support 3 simultaneously.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A wharf crane comprises a crane main body (1) and a lifting appliance (2) arranged on the crane main body (1); the lifting appliance is characterized in that the lifting appliance (2) comprises a lifting support (3), a fixed lifting unit (4) arranged at the bottom of the lifting support (3), and a movable lifting unit (5) which is vertically arranged on the lifting support (3) in a sliding manner and is positioned above the fixed lifting unit (4); the fixed hoisting unit (4) comprises a fixed frame (41) and two groups of fixed clamping mechanisms which are oppositely arranged on the fixed frame (41) and are used for clamping the container (9); the fixing frame (41) has a fixing through hole (411) for passing the container (9); the movable hoisting unit (5) comprises a movable frame (51) and two groups of movable clamping mechanisms which are oppositely arranged on the movable frame (51) and used for clamping the container (9);

the hoisting support (3) comprises a hoisting platform (31) and at least two main pillars (32) vertically arranged on the hoisting platform (31); the main strut (32) comprises a fixed strut (321) fixed on the hoisting platform (31) and expansion struts (322) detachably mounted at the bottoms of the fixed strut (321), the outer diameters of the fixed strut (321) and the expansion struts (322) are the same, and the number of the expansion struts (322) corresponds to the number of the movable hoisting units (5); the fixed hoisting unit (4) can be arranged at the bottom of the fixed support column (321) or the bottom of the expansion support column (322); the movable frame (51) has a guide sleeve (512) cooperating with the general pillar (32).

2. The quay crane according to claim 1, wherein the bottom of the fixed strut (321) and the bottom of the extended strut (322) are both provided with mounting studs (323), and the top of the extended strut (322) is provided with mounting screw holes (3221) for mounting the mounting studs (323) in a threaded manner; the fixing frame (41) is provided with an installation through hole (412) for inserting an installation screw bolt (323), the aperture of the installation screw hole (3221) is smaller than the outer diameter of the fixing support column (321), and the installation screw bolt (323) is further provided with an installation nut (413) which abuts against the bottom of the fixing frame (41) and is used for locking the fixing frame (41) on the hoisting support (3).

3. A quay crane according to claim 2, characterized in that there are provided assembly means (7); the assembling device (7) comprises an assembling bottom plate (71) arranged on the ground, an assembling guide post (72) vertically arranged on the top surface of the assembling bottom plate (71), an assembling platform (73) vertically slidably arranged on the assembling guide post (72) and used for placing the hoisting platform (31), a lifting mechanism driving the assembling platform (73) to lift and an assembling mechanism arranged on the assembling bottom plate (71); the assembling platform (73) is provided with a first through hole (731) for the fixed support column (321) to pass through; the assembling mechanism comprises mounting seats (81) which are rotatably mounted on the assembling bottom plate (71) and correspond to the fixed supporting columns (321) one by one, and driving components for driving the mounting seats (81) to rotate; the top of the mounting seat (81) is provided with a mounting blind hole (811) for inserting the mounting stud (323); the bottom of the mounting stud (323) is provided with a regular hexagonal groove (3231), and the bottom surface of the mounting seat (81) in the mounting blind hole (811) is provided with a regular hexagonal convex part (82) used for being matched with the regular hexagonal groove (3231).

4. A quay crane according to claim 3, characterized in that said lifting mechanism comprises a lifting platform (74) mounted vertically sliding on said assembly columns (72) and below said assembly platform (73) and a lifting hydraulic cylinder (75) mounted on top of said assembly floor (71); a piston rod of the lifting hydraulic cylinder (75) is vertically arranged and connected to the bottom of the lifting platform (74); the lifting platform (74) is provided with second through holes (741) which correspond to the first through holes (731) in a one-to-one manner and are used for the fixed supporting columns (321) to pass through, and an adjusting spring (76) is arranged between the lifting platform (74) and the assembling platform (73).

5. A quay crane according to claim 4, characterized in that the driving assembly comprises a mounting chain wheel (83) mounted outside the mounting seat (81), a driving chain (84) connecting all the mounting chain wheels (83), a driving chain wheel (85) adapted to the driving chain (84), and a driving motor (86) for driving the driving chain wheel (85) to rotate; the driving assembly can drive all the mounting seats (81) to rotate towards the same direction.

6. A quay crane according to claim 2, characterized in that said fixed frame (41) and said movable frame (51) are each provided with a buffer assembly at the top; the buffer assembly comprises a buffer base (61), a buffer top seat (62) and a buffer spring (63) arranged between the buffer base (61) and the buffer top seat (62); the movable frame (51) is also provided with a first buffer part (64) for the buffer assembly below to abut against; the hoisting platform (31) is provided with a second buffer part (65) for abutting against the buffer assembly below.

7. A quay crane according to claim 6, characterized in that the first buffer (64) has a first buffer groove (641) for the insertion of the buffer head (62).

8. A quay crane according to claim 1, characterized in that the fixed clamping mechanism comprises a first clamping cylinder (42) and a first clamping plate (43) mounted on a piston rod of the first clamping cylinder (42); the two ends of the end surface of the first clamping plate (43) facing the container (9) are provided with first clamping convex columns (431) which are used for being inserted into the first hoisting holes (92); the movable clamping mechanism comprises a second clamping oil cylinder (52) and a second clamping plate (53) arranged on a piston rod of the second clamping oil cylinder (52); and second clamping convex columns (531) which are used for being inserted into the first hoisting holes (92) are arranged at two ends of the end surface of the second clamping plate (53) facing the container (9).