CN212246000U - Frame assembly structure and crane - Google Patents

Abstract

The application provides a frame assembly structure and a crane, and relates to the technical field of mechanical equipment. The rack assembly structure comprises a first rack body and a second rack body; the first frame body is provided with a guide pulling plate; be provided with on the second support body and rotate the piece, rotate the piece be used for with direction arm-tie butt, rotate the rotation of piece direction arm-tie relatively, direction arm-tie accessible reaction force drive first support body is drawn close to the second support body. The crane comprises the frame assembly structure provided by the above, the rotation piece is abutted against the guide pull plate, the rotation piece rotates relative to the guide pull plate through a wrench or other driving rotation piece rotating tools, and the guide pull plate drives the pulley frame to be drawn close to the arm support through reaction force. The assembling problem of pulley yoke and cantilever crane in the hoist has been solved to this application, and the pulley yoke installation is more swift, and is safe secure, and the location is more accurate, and need not to change the angle that the direction arm-tie rises.

Description

Frame assembly structure and crane

Technical Field

The application relates to the technical field of mechanical equipment, in particular to a frame assembling structure and a crane.

Background

The conventional crawler crane mainly comprises an arm support and an A-shaped frame (or named as a propeller strut), wherein when the crawler crane is in a working state, a pulley yoke on the A-shaped frame is connected with an upper arm support in the arm support; when the crawler crane is in a transportation state, the pulley yoke needs to be connected with a lower arm support in the arm support. Therefore, when the working state is switched to the transportation state, the connection between the pulley yoke and the upper arm frame needs to be released, and then the pulley yoke and the lower arm frame need to be connected.

Along with the large tonnage of the crawler crane, the heavier the steel wire rope connected with the pulley yoke is, the more difficult the pulley yoke is connected with the lower arm frame, the pulley yoke is connected with the lower arm frame in a manually pulling or foot treading mode at present, the installation is inconvenient, the positioning is inaccurate, and the safety is not guaranteed. In addition, in the prior art, the rising angle of the guide pulling plate on the lower arm support is changed, but the larger the angle is, the higher the possibility of being damaged by pulling is.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the application provides a frame assembly structure and a crane, the problem of assembly of a pulley yoke and an arm frame in the crane is solved, the pulley yoke is installed more quickly and safely, the positioning is more accurate, and the rising angle of a guide pull plate does not need to be changed.

In order to achieve the above object, the present application provides a rack assembly structure, including a first rack and a second rack;

the first frame body is provided with a guide pulling plate;

be provided with on the second support body and rotate the piece, rotate the piece be used for with direction arm-tie butt, it can be relative to rotate the piece direction arm-tie rotates, direction arm-tie accessible reaction force drive first support body to the second support body draws close.

In a possible embodiment, the number of the guide pulling plates comprises two, and the two guide pulling plates are respectively arranged close to two sides of the first frame body;

the number of the rotating pieces comprises two, and the two rotating pieces are respectively rotatably arranged on two sides of the second frame body.

In a possible embodiment, a predetermined number of wrench rods are arranged on a side of the rotating member away from the first frame body, and the wrench rods are uniformly distributed along the circumferential direction of the rotating member.

In a possible implementation mode, the rotation piece is kept away from the one end of first support body is provided with predetermined quantity's shrinkage pool, the shrinkage pool is followed the circumference evenly distributed of rotation piece, the shrinkage pool be used for with the drive rotate a pivoted instrument looks adaptation.

In a possible embodiment, a polygonal boss or a polygonal groove is arranged at the end of the rotating member far away from the first frame body, and the boss or the groove is used for being matched with a tool for driving the rotating member to rotate.

In a possible embodiment, the rotating part is circumferentially provided with a first convex tooth structure, the guiding pulling plate is provided with a second convex tooth structure, and the first convex tooth structure and the second convex tooth structure are in meshing transmission.

In one possible embodiment, the rotating member includes a gear shaft, and the second tooth structure includes a rack, and the gear shaft is in meshing transmission with the rack.

In a possible embodiment, the rotating member includes a mounting shaft and a gear mounted on the mounting shaft, and the second cam structure includes a rack, and the gear is in meshing transmission with the rack.

In one possible embodiment, the contact surface of the rotating piece and the guide pulling plate is provided with an anti-slip agent.

On the other hand, the application also provides a crane, which comprises the frame assembling structure;

the first frame body comprises a pulley yoke, and the pulley yoke is provided with the guide pull plate;

the second frame body comprises an arm support, and the rotating piece is arranged on the arm support.

Compared with the prior art, the beneficial effects of the application are that:

the application provides a frame assembly structure and a crane, wherein the frame assembly structure comprises a first frame body and a second frame body; the first frame body is provided with a guide pulling plate; be provided with on the second support body and rotate the piece, rotate the piece be used for with direction arm-tie butt, rotate the rotation of piece direction arm-tie relatively, direction arm-tie accessible reaction force drive first support body is drawn close to the second support body. The crane comprises the frame assembly structure provided by the above, the rotation piece is abutted against the guide pull plate, the rotation piece rotates relative to the guide pull plate through a wrench or other driving rotation piece rotating tools, and the guide pull plate drives the pulley frame to be drawn close to the arm support through reaction force. The assembling problem of pulley yoke and cantilever crane in the hoist has been solved to this application, and the pulley yoke installation is more swift, and is safe secure, and the location is more accurate, and need not to change the angle that the direction arm-tie rises.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural diagram of a crane provided by an embodiment of the present application;

FIG. 2 shows a schematic structural diagram of the assembly of a pulley yoke and a lower knuckle arm in a crane provided by the embodiment of the application;

fig. 3 is a schematic perspective view illustrating a pulley yoke according to an embodiment of the present application;

FIG. 4 is an enlarged view of a portion of the structure at A in FIG. 3;

fig. 5 is a schematic structural diagram of a rotating member in a pulley frame according to an embodiment of the present application;

fig. 6 is a schematic structural view illustrating a second rotating member according to an embodiment of the present application;

fig. 7 shows a schematic structural diagram of the third rotating element provided by the embodiment of the present application and assembled with the lower joint arm.

Description of the main element symbols:

1-body; 10-a crawler chassis assembly;

2-arm support; 20-a guide pulling plate; 200-inclined plane; 2000-a second lobe configuration; 2000 a-rack; 21-a first fitting part; 210-a first ear plate; 2 a-upper arm; 2 b-a lower knuckle arm;

3-a pulley yoke; 30-a second fitting part; 300-a second ear plate; 300 a-a pin shaft; 31-a rotating member; 310-mounting the shaft; 311-wheel; 3110-wrench lever; 3111-a recess; 313-a first lobe configuration; 313 a-gear; 32-a pulley;

4-A type frame.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Example one

Referring to fig. 1, the frame assembly structure provided in this embodiment may be applied to a crane.

The crane comprises a machine body 1, an arm support 2 arranged on the machine body 1 and an A-shaped frame 4, wherein the arm support 2 comprises an upper knuckle arm 2a and a lower knuckle arm 2b which are opposite, the lower knuckle arm 2b is arranged on the machine body 1, and the upper knuckle arm 2a is arranged on the lower knuckle arm 2 b.

When the crane works normally, the pulley yoke 3 on the A-shaped frame 4 is connected to the upper knuckle arm 2a through a pulling plate, and when the crane needs to enter a transportation state, the pulley yoke 3 on the A-shaped frame 4 needs to be installed on the lower knuckle arm 2b and used for pulling the lower knuckle arm 2b, so that the crane can be transported conveniently.

In this embodiment, the frame assembly structure is applied to a crane as an example, and the technical scheme of the present application is explained as follows:

referring to fig. 1, fig. 2 and fig. 3, the rack assembly structure provided in the present embodiment includes a first rack and a second rack, wherein the first rack is configured to be assembled on the second rack.

Specifically, the first frame body includes an arm support 2, and a guide pulling plate 20 and a first assembling portion 21 are arranged on a lower arm 2b in the arm support 2. The second support body includes pulley yoke 3, is provided with on the pulley yoke 3 and rotates piece 31 and second assembly portion 30, rotates piece 31 and rotates and install on pulley yoke 3, and second assembly portion 30 is used for cooperating with first assembly portion 21 for realize pulley yoke 3 and the assembly of lower cantilever crane 2.

When the pulley frame 3 is assembled with the lower arm 2b of the arm frame 2, the rotating part 31 is abutted against the guide pull plate 20, the rotating part 31 rotates relative to the guide pull plate 20, certain thrust is given to the guide pull plate 20 when the rotating part 31 rotates, because the guide pull plate 20 is fixed on the lower arm 2b, the guide pull plate 20 is static relative to the rotating part 31, the guide pull plate 20 drives the rotating part 31 to move through reaction force, therefore, the rotating part 31 drives the pulley frame 3 to move along the guide pull plate 20 together, and further, the pulley frame 3 is drawn close to the lower arm 2b, so that the second assembling part 30 is aligned with the first assembling part 21, and the assembly is realized.

It will be appreciated that the guide pull plate 20 serves to guide the pulley frame 3 towards the lower knuckle arm 2b, i.e. the guide pull plate 20 serves as a guide, and it will be appreciated that a predetermined number of pulleys 32 are mounted in the pulley frame 3.

Referring to fig. 2 and 6, further, the first mounting portion 21 includes a first ear plate 210, the first ear plate 210 is mounted on the lower arm 2b, and the first ear plate 210 is provided with a first pin hole (not shown). The second assembling portion 30 includes a second lug plate 300, the second lug plate 300 is installed on the pulley yoke 3, and a second pin hole (not shown) is formed in the second lug plate 300, and during assembling, the first pin hole and the second pin hole are aligned, and pass through the first pin hole and the second pin hole through a pin 300a, so that the pulley yoke 3 and the lower arm 2b are assembled.

Further, in the present embodiment, the number of the guiding pulling plates 20 is two, and two guiding pulling plates 20 are respectively disposed near both sides of the lower arm 2b, that is, one guiding pulling plate 20 is disposed on both sides of the lower arm 2 b. Correspondingly, the number of the rotating pieces 31 is two, and the two rotating pieces 31 are respectively arranged on two sides of the pulley frame 3. When the pulley yoke 3 is assembled with the guide pull plate 20, the rotating pieces 31 on both sides of the pulley yoke 3 correspond to the guide pull plates 20 on both sides of the lower arm 2b one by one, that is, the guide pull plates 20 on both sides of the lower arm 2b can play a role in supporting and guiding.

In some embodiments, the guiding pulling plate 20 may be welded to the lower arm 2b, but may also be mounted on the lower arm 2b in an adjustable manner by bolts or positioning pins.

In the present embodiment, the guide pulling plate 20 is adjustably mounted on the lower joint arm 2b by a positioning pin. Wherein, the side of the guiding pulling plate 20 far away from the lower arm 2b is provided with an inclined surface 200, and the inclined surface 200 extends towards the direction of the lower arm 2 b. The inclined surface 200 of the guide pulling plate 20 is used to contact the rotating member 31, and the inclined surface 200 is in frictional contact with the rotating member 31, and when the rotating member 31 rotates, the inclined surface 200 drives the rotating member 31 to move by friction.

In some embodiments, the inclined surface 200 of the deflector plate 20 is roughened to increase the friction between the inclined surface 200 and the rotating member 31.

In other embodiments, an anti-slip agent is disposed between the inclined surface 200 of the guiding pulling plate 20 and the rotating member 31 to increase the friction between the inclined surface 200 and the rotating member 31.

In other embodiments, the inclined surface 200 of the guiding pulling plate 20 is provided with anti-slip elements (not shown), the anti-slip elements are laid on the inclined surface 200, and the anti-slip elements are in frictional contact with the rotating member 31, so that the anti-slip elements can increase friction force to prevent the rotating member 31 from slipping during rotation.

Referring to fig. 2, fig. 3 and fig. 4, in the present embodiment, the rotating member 31 includes a mounting shaft 310 and a rotating wheel 311, wherein the mounting shaft 310 is fixedly connected to the pulley frame 3, the rotating wheel 311 is coaxially and rotatably mounted on the mounting shaft 310, the rotating wheel 311 is configured to abut against the inclined surface 200 of the guiding pulling plate 20, and further, a bearing is disposed between the rotating wheel 311 and the mounting shaft 310.

It can be understood that, by means of the tool driving the rotation wheel 311 to rotate on the mounting shaft 310, since the rotation wheel 311 abuts against the inclined surface 200 of the guiding pulling plate 20, the rotation wheel 311 will generate friction with the inclined surface 200 of the guiding pulling plate 20 when rotating, the guiding pulling plate 20 drives the pulley frame 3 to move through the reaction force, and then the pulley frame 3 is moved closer to the lower joint arm 2b, and the reaction force is the friction force.

Among the tools for driving the rotation wheel 311 to rotate are wrenches, such as solid wrench, electric wrench, and filter wrench, which use the lever principle to drive the rotation wheel 311 to rotate, which is more labor-saving. It should be understood that the above description is intended to be illustrative only and should not be taken as limiting the scope of the present application.

The frame assembly structure that this embodiment provided utilizes the reaction force drive pulley yoke 3 of direction arm-tie 20 to draw close to lower section arm 2b, realizes first pinhole and the accurate counterpoint of second pinhole, realizes the assembly between pulley yoke 3 and lower section arm 2b through round pin axle 300 a. This application simple structure, convenient operation, pulley yoke 3 is more steady in the removal on direction arm-tie 20, steps on with the foot and hand power among the prior art relatively, and is safer and more reliable, and the assembly precision is higher. Meanwhile, the pulley yoke 3 and the lower-section arm 2b can be driven to be assembled through a tool, and the lever principle is utilized, so that the assembly is more labor-saving. Therefore, the pulley frame 3 and the lower knuckle arm 2b can be assembled without changing the vertical angle of the guide pull plate 20.

Example two

The frame assembly structure that this embodiment provided can be applied to on the hoist. The present embodiment is an improvement on the basis of the first embodiment, and the main difference is that:

referring to fig. 2, fig. 3 and fig. 5, in the present embodiment, the rotating member 31 includes a mounting shaft 310 and a rotating wheel 311, wherein the mounting shaft 310 is fixedly connected to the pulley frame 3, the rotating wheel 311 is coaxially and rotatably mounted on the mounting shaft 310, the rotating wheel 311 is configured to abut against the inclined surface 200 of the guiding pulling plate 20, and further, a bearing is disposed between the rotating wheel 311 and the mounting shaft 310. A predetermined number of trigger levers 3110 are provided on a side of the wheel 311 away from the pulley frame 3, and the trigger levers 3110 extend in a direction away from the wheel 311. It will be appreciated that wheel 311 is rotated by actuating trigger lever 3110.

Further, wrench lever 3110 is evenly distributed along the circumference of runner 311, and it is more steady to guarantee that wrench lever 3110 drives runner 311 pivoted like this, and then more steady that pulley yoke 3 removed.

In other specific embodiments, the number of trigger levers 3110 is provided with four, five, six, etc. It should be understood that the foregoing is illustrative only and is not intended to limit the scope of the present application.

Compared with the first embodiment, the rack assembly structure provided by this embodiment has more convenient operation by replacing the tool for driving the rotation wheel 311 with the wrench lever 3110.

EXAMPLE III

The frame assembly structure that this embodiment provided can be applied to on the hoist. The present embodiment is an improvement on the first embodiment, and compared with the first embodiment, the difference is that:

referring to fig. 2, fig. 3 and fig. 6, in the present embodiment, the rotating member 31 includes a mounting shaft 310 and a rotating wheel 311, wherein the mounting shaft 310 is fixedly connected to the pulley frame 3, the rotating wheel 311 is coaxially and rotatably mounted on the mounting shaft 310, the rotating wheel 311 is configured to abut against the inclined surface 200 of the guiding pulling plate 20, and further, a bearing is disposed between the rotating wheel 311 and the mounting shaft 310. The side of runner 311 is kept away from pulley yoke 3 is provided with predetermined quantity's shrinkage pool 3111, and shrinkage pool 3111 is along the circumference evenly distributed of runner 311, and shrinkage pool 3111 is used for the instrument looks adaptation that drives runner 311 pivoted. It will be appreciated that the tool for driving the rotation of the wheel 311 is engaged with the notch 3111 to drive the wheel 311 to rotate.

Example four

Referring to fig. 2 to fig. 6, the frame assembly structure provided in this embodiment can be applied to a crane. The present embodiment is an improvement on the first embodiment, and the difference is that:

in the present embodiment, the rotating member 31 includes a mounting shaft 310, the mounting shaft 310 is rotatably mounted on the pulley frame 3 through a bearing, and the mounting shaft 310 is configured to abut against the inclined surface 200 of the guide pulling plate 20. The end of the mounting shaft 310 remote from the pulley yoke 3 is provided with a polygonal projection (not shown) or a groove (not shown) for fitting a tool for driving the mounting shaft 310 to rotate. It will be appreciated that the tool that drives the mounting shaft 310 to rotate engages the boss or recess, which in turn drives the mounting shaft 310 to rotate.

In some specific embodiments, a predetermined number of wrench bars 3110 or recesses 3111 can be disposed on the mounting shaft 310, and the wrench bars 3110 and the recesses 3111 are described in detail in the second and third embodiments, and are not described again here.

EXAMPLE five

Referring to fig. 1 to 7, the frame assembly structure provided in this embodiment can be applied to a crane. The present embodiment is an improvement on any of the above embodiments, and compared with any of the above embodiments, the main difference is that:

specifically, referring to fig. 7, in the present embodiment, the rotating member 31 is circumferentially provided with a first protruding tooth structure 313, the guiding pulling plate 20 is provided with a second protruding tooth structure 2000, and the first protruding tooth structure 313 and the second protruding tooth structure 2000 are in meshing transmission, that is, the second protruding tooth structure 2000 provides a reaction force to the first protruding tooth structure 313 to realize the movement of the driving pulley frame 3, and further realize the assembly of the pulley frame 3 and the lower link arm 2b, where the reaction force is a thrust force and a friction force. It will be appreciated that the second lobe configuration 2000 is provided on the inclined surface 200 and is arranged along the extension direction of the inclined surface 200.

It should be noted that, for the rotating member 31 provided in the first to third embodiments, the first tooth structure 313 is disposed on the rotating wheel 311. With respect to the rotating member 31 provided in the fourth embodiment, the first tooth structure 313 is disposed on the mounting shaft 310.

EXAMPLE six

Referring to fig. 1 to 7, the frame assembly structure provided in this embodiment can be applied to a crane. The present embodiment is an improvement made on the basis of the fifth embodiment, and compared with the fifth embodiment, the main difference is that:

referring to fig. 7, in the present embodiment, the rotating member 31 includes a mounting shaft 310 and a gear 313a, the mounting shaft 310 is rotatably mounted on the pulley frame 3, the gear 313a is mounted on the mounting shaft 310, and the gear 313a and the mounting shaft 310 can be mounted by key fitting, or welding. The second protruding tooth structure 2000 arranged on the guiding pulling plate 20 comprises a rack 2000a, and a gear 313a is in meshing transmission with the rack 2000a to realize the assembly of the pulley yoke 3 and the lower knuckle arm 2 b.

In some specific embodiments, the gear 313a and the mounting shaft 310 may be formed as an integral gear shaft structure, i.e., the gear 313a and the mounting shaft 310 may be replaced with a gear shaft structure.

In other embodiments, the gear 313a can be a sprocket and the rack 2000a can be a chain, although a timing belt can also be implemented.

EXAMPLE seven

Referring to fig. 1 to 7, the crane provided in this embodiment includes a machine body 1, an arm support 2 disposed on the machine body 1, and an a-frame 4. The crane provided by the embodiment uses the frame assembling structure provided by any one of the above embodiments.

Further, the crane is a crawler crane, that is, a crawler chassis assembly 10 is disposed below the machine body 1.

Referring to fig. 1, the arm support 2 includes an upper arm 2a and an opposite lower arm 2b, the lower arm 2b is mounted on the machine body 1, the upper arm 2a is mounted on the lower arm 2b, further, the upper arm 2a and the lower arm 2b are truss structures, and the upper arm 2a and the lower arm 2b are both V-shaped.

When the crane works normally, the pulley yoke 3 on the A-shaped frame 4 is connected to the upper knuckle arm 2a through a pulling plate, and when the crane needs to enter a transportation state, the pulley yoke 3 on the A-shaped frame 4 needs to be installed on the lower knuckle arm 2b and used for pulling the lower knuckle arm 2b, so that the crane can be transported conveniently. Therefore, in order to realize the transition of the crane from the working state to the transportation state, the specific operation method comprises the following steps:

referring to fig. 1 and fig. 2 in combination, firstly, the a-shaped frame 4 is controlled to act, and the arm support 2 is controlled to execute an arm bending action, so that the arm support 2 is in a relative horizontal position; next, the worker removes the connection between the pulley yoke 3 on the a-frame 4 and the upper knuckle arm 2a, and the pulley yoke 3 falls on the guiding pulling plate 20, that is, the rotating member 31 contacts the guiding pulling plate 20; then, the rotating part 31 is driven to rotate through a tool, so that the pulley frame 3 moves along the guide pulling plate 20 and approaches the lower knuckle arm 2b, and after a second pin hole on the pulley frame 3 is aligned with the first pin hole; finally, the worker inserts the pin shaft 300a through the second pin hole and the first pin hole to assemble the pulley yoke 3 and the lower arm 2 b.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A frame assembly structure is characterized by comprising a first frame body and a second frame body;

the first frame body is provided with a guide pulling plate;

be provided with on the second support body and rotate the piece, rotate the piece be used for with direction arm-tie butt, it can be relative to rotate the piece direction arm-tie rotates, direction arm-tie accessible reaction force drive first support body to the second support body draws close.

2. The rack assembly structure according to claim 1, wherein the number of the guide pulling plates comprises two, and the two guide pulling plates are respectively arranged close to two sides of the first rack body;

the number of the rotating pieces comprises two, and the two rotating pieces are respectively rotatably arranged on two sides of the second frame body.

3. The rack assembly structure according to claim 2, wherein a predetermined number of wrench rods are provided on a side of the rotating member away from the first frame body, and the wrench rods are uniformly distributed along a circumferential direction of the rotating member.

4. The rack assembly structure according to claim 2, wherein a predetermined number of concave holes are formed in one end of the rotating member, which is far away from the first frame body, and are uniformly distributed along the circumferential direction of the rotating member, and the concave holes are used for being matched with a tool for driving the rotating member to rotate.

5. The rack assembly structure according to claim 2, wherein the end of the rotating member away from the first frame body is provided with a polygonal boss or groove, and the boss or groove is adapted to a tool for driving the rotating member to rotate.

6. The frame assembly structure according to claim 1, wherein the rotating member is circumferentially provided with a first protruding tooth structure, the guiding pulling plate is provided with a second protruding tooth structure, and the first protruding tooth structure is in meshing transmission with the second protruding tooth structure.

7. The rack mounting structure of claim 6, wherein the rotating member comprises a gear shaft, and the second tooth structure comprises a rack, and the gear shaft is in meshing transmission with the rack.

8. The rack assembly structure according to claim 6, wherein the rotating member includes a mounting shaft and a gear, the gear is mounted on the mounting shaft, and the second cam structure includes a rack, and the gear is in meshing transmission with the rack.

9. The rack assembly structure according to any one of claims 1 to 8, wherein an abutting surface of the rotating member and the guide pulling plate is provided with an anti-slip agent.

10. A crane, comprising a frame mounting structure according to any one of claims 1-9;

the first frame body comprises a pulley yoke, and the pulley yoke is provided with the guide pull plate;

the second frame body comprises an arm support, and the rotating piece is arranged on the arm support.

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