CN217458544U - Connection structure, beam frame and container crane - Google Patents

Abstract

The application provides a connection structure, roof beam structure and container crane, this connection structure is applicable to being connected of landing leg and crossbeam, and connection structure is including first articulated shaft and second articulated shaft, and the landing leg is articulated with the crossbeam through first articulated shaft and second articulated shaft, and the axis direction of first articulated shaft and second articulated shaft all is unanimous with the extending direction of crossbeam. The application provides a connection structure is applicable to being connected of landing leg and crossbeam, and furthest's reduction crossbeam is because of receiving crooked, make the crossbeam maintain the horizontality as far as that produces. When the trolley for lifting the heavy object runs on the cross beam in a load mode, collision and friction between wheels of the trolley and the cross beam can be effectively avoided, the probability of rail gnawing is greatly avoided, the running safety of equipment and the use performance of the equipment are improved, and the problem that the rail gnawing is easy to occur in the moving process of the trolley on the cross beam due to rigid connection of supporting legs and the cross beam in the prior art is solved.

Description

Connection structure, beam frame and container crane

Technical Field

The application relates to the technical field of cranes, in particular to a connecting structure, a beam frame and a crane.

Background

Beam frames are usually supported by two legs, especially beam frames with large span, such as beam frames of gantry cranes. As shown in fig. 1, in the prior art, both legs are rigidly connected to the cross member. The cross beam has no offset in the horizontal direction with respect to the legs. When the lifting trolley runs on the cross beam, under the normal running condition, the cross beam is in a horizontal state, and the rim of the lifting trolley and the edge of the rail have a horizontal gap, so that collision cannot occur. However, due to hoisting errors, gantry deformation, terrain variation and other reasons, the beam cannot always maintain a high-precision horizontal state, and often generates deflection due to bending moment. The bending moment received under different conditions is different, and the generated deflection condition is also different. When the cross beam is tilted and cannot be in a horizontal state due to the above reasons, the trolley moves on the tilted cross beam, and a phenomenon that a rim of the trolley touches and rubs with an edge of a track, which is called a "rail gnawing" phenomenon, occurs. The rail gnawing phenomenon appears when equipment normally operates, the crane can be caused to operate unstably, the abrasion of the rail and the loading wheel of the crane is accelerated, the energy consumption is increased, the accident of derailment or overturning of the trolley can be caused when the rail gnawing is serious, and potential great potential safety hazards are caused.

Disclosure of Invention

In view of this, the embodiment of the present application is directed to providing a connection structure, which is suitable for connection between a leg and a cross beam, so as to solve the problem in the prior art that a trolley on the cross beam is prone to rail gnawing during a moving process due to rigid connection between the leg and the cross beam.

This application aspect provides a connection structure, is applicable to being connected of landing leg and crossbeam, connection structure is including first articulated shaft and second articulated shaft, the landing leg passes through first articulated shaft with the second articulated shaft with the crossbeam is articulated, first articulated shaft with the axis direction of second articulated shaft all with the extending direction of crossbeam is unanimous.

In a possible embodiment, the first hinge axis is coaxially arranged with the second hinge axis and spaced apart therefrom.

In a possible embodiment, a self-lubricating bushing is sleeved on the first hinge shaft and/or the second hinge shaft.

In a possible implementation, the method further comprises the following steps: the connecting seat is fixedly connected with the cross beam; the base is connected with the supporting leg and is hinged with the connecting seat through the first hinge shaft and the second hinge shaft.

In a possible embodiment, a butt joint limiting structure for preventing axial dislocation is arranged between the connecting seat and the base.

In a possible embodiment, the docking limiting structure includes: a butt joint protrusion provided on any one of the connecting base and the base; and the butt joint groove is arranged on the other one of the connecting seat and the base and is used for accommodating the butt joint bulge.

In a possible embodiment, a dropping-preventing structure for preventing the first hinge shaft and the second hinge shaft from dropping is further included.

In a possible embodiment, each of the first hinge shaft and the second hinge shaft includes a shaft portion penetrating the connecting seat and the base, and a boss portion whose inner side abuts against the connecting seat or the base, and the falling off prevention structure includes a catch plate preventing the boss portion from being away from the abutting position.

In a possible implementation manner, the connection seat includes a first plug board group and a second plug board group that are arranged at intervals, the base includes a third plug board group and a fourth plug board group that are arranged at intervals, each of the two plug board groups includes two connecting boards that are arranged at intervals and oppositely, the first plug board group is plugged with the third plug board group, the first hinge shaft penetrates through the connecting boards of the first plug board group and the third plug board group to realize hinge, the second plug board group is plugged with the fourth plug board group, and the second hinge shaft penetrates through the connecting boards of the second plug board group and the fourth plug board group to realize hinge.

The beam frame comprises a cross beam, a first leg and a second leg, wherein the first leg is hinged with the cross beam through the connecting structure.

The application also provides a container crane, which comprises the beam frame.

According to the connection structure provided by the application, the supporting leg and the cross beam are hinged with the second hinge shaft through the first hinge shaft instead of being rigidly connected, so that after the cross beam bears bending moment, one end of the cross beam hinged with the supporting leg can automatically deflect to the left side or the right side to balance the borne bending moment, and the cross beam is in a non-inclined horizontal state as far as possible; in addition, the landing leg is articulated through two articulated shafts with the crossbeam, has double pin joint, has double shearing force bearing surface, can provide stable support's basis for the crossbeam at the landing leg, make the more sensitive better balanced moment of flexure of crossbeam, improve produced deflection volume and the matching degree of the moment of bending that receives, the different moment that receives through the automatic deflection balance as far as, thereby, furthest's reduction crossbeam crooked degree, make the crossbeam maintain the horizontality as far as always. When the trolley for lifting the heavy object runs on the cross beam in a load mode, collision and friction between wheels of the trolley and the cross beam can be effectively avoided, the probability of rail gnawing is greatly avoided, and the running safety of equipment and the use performance of the equipment are improved.

Drawings

FIG. 1 is a cross-sectional view showing a connecting structure in an embodiment of the present application;

FIG. 2 is a side view of the attachment structure of the embodiment of the present application;

FIG. 3 is a cross-sectional view of the connector holder of the embodiment of the present application;

FIG. 4 is a side view of the connector housing of the present embodiment;

FIG. 5 is a cross-sectional view of the base in an embodiment of the present application;

fig. 6 shows a side view of the base in an embodiment of the present application.

In FIGS. 1-6:

1. a first hinge shaft; 2. a second hinge shaft; 3. a connecting seat; 31. a base plate; 32. a first end plate; 33. a second end plate; 34. a first ear plate; 35. a second ear panel; 36. a butt joint block; 4. a base; 41. a third ear panel; 42. a fourth ear panel; 43. a fifth ear panel; 44. a sixth ear plate; 45. a support plate; 46. a sleeve; 47. butting the bulges; 5. a self-lubricating shaft sleeve; 6. and (4) clamping the board.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1 to 6, the embodiment of the present application provides a connection structure, which is suitable for connecting a leg 100 and a cross beam, and the connection structure includes a first hinge shaft 1 and a second hinge shaft 2, the leg 100 is hinged to the cross beam through the first hinge shaft 1 and the second hinge shaft 2, and the axial directions of the first hinge shaft 1 and the second hinge shaft 2 are consistent with the extending direction of the cross beam. When the cross member is supported by two legs, one leg may be rigidly connected to the cross member, and the other leg 100 is hinged to the cross member by the above-mentioned connecting structure, so that an end of the cross member hinged to the leg 100 (hereinafter referred to as a hinged end) has an amount of movement to deflect to the left or right.

With the arrangement, when the cross beam is subjected to bending moment to generate deflection due to the terrain problem or the load stress problem, the hinged end of the cross beam can automatically deflect to the left side or the right side due to the bending moment, so that the borne bending moment is balanced, and the cross beam is in a horizontal state without deflection as much as possible; in addition, landing leg 100 is articulated through two articulated shafts with the crossbeam, compare with an articulated shaft, double pin joint has, double shearing force bears the face, can enough improve articulated support steadiness, also can improve the rotation flexibility of pin joint, can be on the basis of providing stable support for the crossbeam, improve the produced deflection volume of crossbeam and the matching degree of the moment of bending that receives, can make the more sensitive better different size not equidirectional moment of bending of balancing of crossbeam, the different moment of bending that receives through the different moments of auto-migration balance as far as, thereby, furthest's the crooked degree of reduction crossbeam, make the crossbeam maintain the horizontality always as far as possible. When the trolley for lifting the heavy object runs on the cross beam in a load mode, the cross beam can balance the bending torsion generated by the load of the trolley, collision and friction between wheels of the trolley and the cross beam are effectively avoided, the probability of rail gnawing is greatly avoided, and the running safety of equipment and the using performance of the equipment are improved. Meanwhile, before the trolley runs, the cross beam balances the bending moment generated by terrain or position movement and other non-trolley factors and is in a better horizontal state, so that when the trolley runs under a load, the bending moment of the cross beam caused by the load running of the trolley is smaller, the generated deflection is smaller, and the trolley has benefits on the stable running of the trolley.

It can be seen that the connection structure who is applied to landing leg 100 and crossbeam that this application provided makes the crossbeam have the automatic regulating power who deflects and balance the moment of flexure on the horizontal direction, and landing leg 100 is articulated through two axially parallel articulated shafts with the crossbeam, comes the balance moment of flexure, make the crossbeam have more nimble more sensitive reaction capacity, can produce different deflection volume according to the different moment of flexure that receives, also can improve the matching degree of produced deflection volume and the moment of flexure that receives, the moment of flexure is fallen in better balance.

Simultaneously, from another angle, landing leg 100 is articulated through two articulated shafts with the crossbeam, and when the moment of flexure size that the crossbeam received was unchangeable, the diameter of first articulated shaft 1 and second articulated shaft 2 is compared in the diameter of a logical long articulated shaft, can reduce, so, on the one hand, is convenient for carry out articulated connection operation, is convenient for be under construction, and on the other hand, the deflection of crossbeam is more nimble.

As shown in fig. 1, the first hinge shaft 1 is coaxially disposed with the second hinge shaft 2 and spaced apart therefrom. Two articulated shafts are coaxial, and the pin joint is located same height for the deflection of crossbeam is more smooth and easy, can not produce the card and pause, also makes the regional power that receives at the articulated point department of landing leg 100 more balanced. Of course, in other embodiments, the first hinge shaft 1 and the second hinge shaft 2 may be arranged in parallel, and the two hinge shafts are at different heights, for example, when the support leg 100 is vertically arranged, the height of the first hinge shaft 1 is lower than the height of the second hinge shaft 2.

First articulated shaft 1 and 2 interval arrangements of second articulated shaft then have empty space between two articulated shafts, and during installation or dismantlement articulated shaft, the jack that supports the articulated shaft can be put here and supported by landing leg 100, need not to erect or build extra platform that is used for placing the jack in the landing leg 100 outside, and the very apparent simple installation and dismantlement operation that has just made things convenient for.

The first articulated shaft 1 and/or the second articulated shaft 2 are/is sleeved with a self-lubricating shaft sleeve 5. Whether an articulated shaft is sleeved with a self-lubricating shaft sleeve or two articulated shafts are all sleeved with self-lubricating shaft sleeves can be specifically set according to specific construction working conditions. In one embodiment, the first hinge shaft 1 and the second hinge shaft 2 are respectively sleeved with a self-lubricating shaft sleeve 5. Due to the arrangement, the lubricating property of the hinge points of the first hinge shaft 1 and the second hinge shaft 2 can be ensured, and the smoothness of deflection of the cross beam is ensured; simultaneously, set up self-lubricating axle sleeve 5, can avoid setting up lubricating oil, also avoided setting up the pipeline of pouring into lubricating oil to two articulated shafts, simplify the loaded down with trivial details degree of structure, simple and convenient operation.

The connecting structure further comprises a connecting seat 3 and a base 4, the connecting seat 3 is fixedly connected with the cross beam, the base 4 is connected with the supporting leg 100 and can be assembled on the supporting leg 100 or be a local part of the supporting leg 100, and the connecting seat 3 is hinged to the base 4 through a first hinge shaft 1 and a second hinge shaft 2. Thus, the top end of the supporting leg 100 is prevented from being directly hinged with the cross beam, and the assembly operation is simple and convenient.

A butt joint limiting structure for preventing axial dislocation is arranged between the connecting seat 3 and the base 4. So set up, can prevent connecting seat 3 and 4 axial malposition of base, also enable the quick accurate butt joint of connecting seat 3 and base 4 and target in place, be convenient for base 4 and the connecting hole on connecting seat 3 fast and accurate adjusting well, make the articulated shaft penetrate fast and realize articulated equipment.

In one embodiment, as shown in fig. 1, the abutting-joint limiting structure includes an abutting-joint groove and an abutting-joint protrusion 47, the abutting-joint groove is disposed on either one of the connecting seat 3 and the base 4, and the abutting-joint protrusion 47 is disposed on the other one of the connecting seat 3 and the base 4 and is inserted into the abutting-joint groove. The docking groove and the docking protrusion 47 both extend in the radial direction of the first hinge shaft 1 and the second hinge shaft 2.

Further, the connection structure further includes an anti-drop structure for preventing the first hinge shaft 1 and the second hinge shaft 2 from dropping.

As shown in fig. 2, each of the first hinge shaft 1 and the second hinge shaft 2 includes a shaft portion penetrating the connecting seat 3 and the base 4, and a boss portion whose inner side (side close to the shaft portion) abuts the connecting seat 3 or the base 4, and the anti-drop structure includes a catch plate 6 preventing the boss portion from being away from the abutting position.

The clamping plate 6 can be fixedly connected with the connecting seat 3 or the base 4 at two ends respectively, and at least partial area covers and supports the outer side (the side far away from the shaft part) of the boss part, so that the hinged shaft is effectively prevented from loosening and falling off.

And the first articulated shaft 1 and the second articulated shaft 2 are respectively provided with a clamping groove which is radially sunken and is used for embedding the part of the clamping plate 6, and two ends of the clamping plate 6 are fixedly connected with the connecting seat 3 or the base 4 respectively and are embedded into the clamping grooves in at least partial areas, so that the articulated shafts are effectively prevented from loosening and falling off.

Fig. 1 shows a structure of a connection seat 3 and a base 4, in this embodiment, the connection seat 3 includes a first insertion plate group and a second insertion plate group which are arranged at intervals, the base 4 includes a third insertion plate group and a fourth insertion plate group which are arranged at intervals, the first insertion plate group is inserted into the third insertion plate group and enables a hinge hole on the first insertion plate group to be aligned with a hinge hole on the third insertion plate group in a coaxial manner, a first hinge shaft 1 penetrates through the hinge holes of the first insertion plate group and the third insertion plate group to realize the hinge connection of the two plate groups, the second insertion plate group is inserted into the fourth insertion plate group and enables a hinge hole on the second insertion plate group to be aligned with a hinge hole on the fourth insertion plate group in a coaxial manner, and a second hinge shaft 2 penetrates through the hinge holes of the second insertion plate group and the third insertion plate group to realize the hinge connection of the two plate groups, so that the hinge connection seat 3 and the hinge support leg 100 of the base 4 are hinged to the cross beam.

In one embodiment, each plate group comprises two connecting plates which are arranged at intervals and oppositely to form a space for inserting the butt plate group, for example, two connecting plates of a third plug plate group are inserted between two connecting plates of a first plug plate group and can be correspondingly abutted against the connecting plates of the first plug plate group, hinge holes in the connecting plates of the two plate groups are coaxially opposite, and a first hinge shaft 1 penetrates through the connecting plates of the first plug plate group and the third plug plate group to realize the hinge joint of the second plug plate group and a fourth plug plate group; two connecting plates of the fourth plug board group are inserted between two connecting plates of the second plug board group and can be correspondingly abutted against the connecting plates of the first plug board group, hinge holes in the two connecting plates of the two board groups are coaxial and opposite, and the second hinge shaft 2 penetrates through the connecting plates of the first plug board group and the third plug board group to realize the hinge joint of the second plug board group and the fourth plug board group.

As shown in fig. 3 and 4, the connecting socket 3 includes a bottom plate 31, a first end plate 32 and a second end plate 33 connected to two ends of the bottom plate 31 and located on one side of the bottom plate 31, a first ear plate 34 and a second ear plate 35 arranged at an interval are disposed between the first end plate 32 and the second end plate 33, the first end plate 32 and the first ear plate 34, the first ear plate 34 and the second ear plate 35, and the second ear plate 35 and the second end plate 33 are connected by a transverse plate, the first end plate 32 and the first ear plate 34 can form a first plug plate group in the above embodiments, and the second end plate 33 and the second ear plate 35 can form a second plug plate group in the above embodiments. At the hinge holes, the inner and outer plate surfaces of the first end plate 32, the first ear plate 34, the second ear plate 35 and the second end plate 33 can be laid with reinforcing backing plates, and the hinge holes penetrate through the reinforcing backing plates.

As shown in fig. 5 and 6, the base 4 includes four ear plates, i.e., a third ear plate 41, a fourth ear plate 42, a fifth ear plate 43, and a sixth ear plate 44, connected to the leg 100, the three ear plates 41, the fourth ear plate 42, the fifth ear plate 43, and the sixth ear plate 44 are sequentially arranged at intervals along the width or length direction of the leg 100, the third ear plate 41 and the fourth ear plate 42 form a third plug board group, the fourth ear plate 42 and the fifth ear plate 43 form a fourth plug board group, and reinforcing pads may be laid on the inner and outer board surfaces of each ear plate.

A first sleeve 46 for the penetration of the first hinge shaft 1 is further transversely connected between the third ear plate 41 and the fourth ear plate 42, and the diameter of the first sleeve 46 is not less than the diameter of the hinge holes on the third ear plate 41 and the fourth ear plate 42; a second sleeve 46 for the second hinge shaft 2 to penetrate is transversely connected between the fifth ear plate 43 and the sixth ear plate 44, and the diameter of the second sleeve 46 is not less than the diameter of the hinge holes on the fifth ear plate 43 and the sixth ear plate 44.

On first articulated shaft 1 and second articulated shaft 2, the axle sleeve is all established on the axial region from moist cover, and an end of axle sleeve offsets with the inboard (the one side that is close to the axial region) of boss portion. The diameters of the hinge holes in the first lug plate 34 and the second lug plate 35 of the connecting seat 3 are matched with the diameter of the shaft part, the diameter of the hinge hole in the base 4 is matched with the outer diameter of the shaft sleeve, and the diameters of the hinge holes in the first end plate 32 and the second end plate 33 are matched with the outer diameter of the boss part. The first otic placode 34 is worn out to the end (the one end of keeping away from the boss portion) of first articulated shaft 1 axial region, and the one end of self-lubricating axle sleeve 5 on it offsets with first otic placode 34, and the other end offsets with the boss portion, and boss portion embedding first end plate 32 is downthehole and offset with third otic placode 41, and the axial region of first articulated shaft 1 and self-lubricating axle sleeve 5 endotheca are downthehole at the articulated of third otic placode 41 and fourth otic placode 42. The end of the shaft part of the second hinge shaft 2 penetrates out of the second ear plate 35, one end of the self-lubricating shaft sleeve 5 on the second hinge shaft abuts against the second ear plate 35, the other end of the self-lubricating shaft sleeve abuts against the boss part, the boss part is embedded into the hinge hole of the second end plate 33 and abuts against the sixth ear plate 44, and the shaft part of the second hinge shaft 2 and the self-lubricating shaft sleeve 5 are sleeved in the hinge hole of the fifth ear plate 43 and the sixth ear plate 44.

The transverse plates between the first end plate 32 and the first ear plate 34 and the transverse plates between the second end plate 33 and the second ear plate 35 are both provided with butt-joint blocks 36, and the butt-joint blocks 36 are provided with the butt-joint grooves, for example, the cross sections of the butt-joint blocks 36 are U-shaped. A support plate 45 is transversely connected between the third ear plate 41 and the fourth ear plate 42 and between the fifth ear plate 43 and the sixth ear plate 44, and a butt joint protrusion 47 used for being inserted into the butt joint groove is arranged on the support plate 45.

Embodiments of the present application further provide a beam mount, comprising a beam, a first leg and a second leg, wherein the first leg is hinged to the beam via a connecting structure as described in any of the above embodiments, and the second leg is rigidly connected to the beam. So set up, the roof beam structure that this embodiment provided, its crossbeam have automatic the controllability that deflects on the horizontal direction and come the balanced moment of flexure, and first landing leg is articulated, comes the balanced moment of flexure with the crossbeam through two axially parallel articulated shafts for the crossbeam has more nimble more sensitive reaction capability, can produce different deflection according to the different moment of flexure that receives, also can improve produced deflection and the matching degree of the moment of flexure that receives, the moment of flexure is fallen in better balance. The derivation process of the beneficial effect is basically the same as the derivation process of the beneficial effect of the connection structure, and details are not repeated here.

Embodiments of the present application also provide a container crane comprising a beam mount as described above. So set up, the container crane that this embodiment provided, its crossbeam has the automatic regulating power who deflects and balance the moment of flexure on the horizontal direction, and first landing leg is articulated, comes balance the moment of flexure with the crossbeam through two axially parallel's articulated shaft for the crossbeam has more nimble more sensitive reaction capability, can produce different deflection volume according to the different moment of flexure that receives, also can improve produced deflection volume and the degree of matching of the moment of flexure that receives, the moment of flexure is fallen in better balance. The derivation process of the beneficial effect is basically the same as the derivation process of the beneficial effect of the connection structure, and details are not repeated here.

The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.

The components, devices referred to in this application are meant as illustrative examples only and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the drawings. These components, devices may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. As used herein, the words "or" and "refer to, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".

It should also be noted that in the apparatus and devices of the present application, the components may be disassembled and/or reassembled. These decompositions and/or recombinations are to be considered as equivalents of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used for clearly explaining the technical solutions, and are not used for limiting the protection scope of the present application.

The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

Claims (11)

1. The utility model provides a connection structure, is applicable to being connected of landing leg and crossbeam, its characterized in that, connection structure is including first articulated shaft and second articulated shaft, the landing leg passes through first articulated shaft with the second articulated shaft with the crossbeam is articulated, first articulated shaft with the axis direction of second articulated shaft all with the extending direction of crossbeam is unanimous.

2. The coupling structure according to claim 1, wherein said first hinge axis is coaxially disposed with said second hinge axis and spaced therefrom.

3. The coupling structure as claimed in claim 1, wherein a self-lubricating bushing is fitted over the first hinge shaft and/or the second hinge shaft.

4. The connecting structure according to claim 1 or 2, further comprising:

the connecting seat is fixedly connected with the cross beam;

the base is connected with the supporting leg and is hinged with the connecting seat through the first hinge shaft and the second hinge shaft.

5. The connecting structure according to claim 4, wherein an abutting limit structure for preventing axial dislocation is provided between the connecting seat and the base.

6. The connection structure of claim 5, wherein the docking retaining structure comprises:

a docking protrusion provided on either one of the connecting base and the base;

and a docking groove provided on the other one of the connecting seat and the base to receive the docking protrusion.

7. The connecting structure according to claim 4, further comprising a falling-off preventing structure for preventing said first hinge shaft and said second hinge shaft from falling off.

8. The connecting structure according to claim 7, wherein each of said first hinge shaft and said second hinge shaft includes a shaft portion penetrating said connecting base and said base, and a boss portion whose inner side abuts against said connecting base or said base, said coming-off preventing structure including a catch plate for preventing said boss portion from coming away from the abutting position.

9. The connection structure of claim 4, wherein the connection seat comprises a first plug board group and a second plug board group which are arranged at intervals, the base comprises a third plug board group and a fourth plug board group which are arranged at intervals, each plug board group comprises two connecting boards which are arranged at intervals and oppositely,

the first plug board group is plugged with the third plug board group, the first hinge shaft penetrates through each connecting board of the first plug board group and the third plug board group to realize hinge joint,

the second plug board group is plugged with the fourth plug board group, and the second hinge shaft penetrates through the connecting plates of the second plug board group and the fourth plug board group to realize hinge.

10. Beam mount comprising a cross-member, a first leg and a second leg, wherein the first leg is hingedly connected to the cross-member by a connecting structure according to any of claims 1-9.

11. A container crane comprising the beam of claim 10.

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