CN214734002U

CN214734002U - Crane boom, combined boom and crane

Info

Publication number: CN214734002U
Application number: CN202120898020.0U
Authority: CN
Inventors: 朱发浩; 赵江平; 周玉龙
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2021-04-28
Filing date: 2021-04-28
Publication date: 2021-11-16
Anticipated expiration: 2031-04-28

Abstract

The utility model discloses a crane jib, combination formula cantilever crane and hoist, crane jib are used for the hoist, crane jib include the main arm festival and be used for with the end connection's of main arm festival end part, the end part includes arm head subassembly and/or is used for connecting the main arm festival with the end connecting piece of the body of hoist, the end part with when the main arm festival is connected, the end part with the size of the contained angle of main arm festival is adjustable.

Description

Crane boom, combined boom and crane

Technical Field

The utility model relates to an engineering machine tool technical field, in particular to crane jib, combination formula cantilever crane and hoist.

Background

A crane refers to a machine for vertically lifting or vertically lifting and horizontally moving a heavy object. Boom cranes lift a heavy object by means of a crane boom, in some cranes the crane boom comprises a boom for lifting the heavy object, in some cranes the crane boom comprises a main arm, an auxiliary arm and the like. The crane boom in the prior art has the advantages of fixed structural form, weak deformability and single function.

Disclosure of Invention

An object of the utility model is to provide a crane jib, this crane jib can satisfy multiple functional requirement. The utility model discloses still provide a combination formula cantilever crane and hoist of using this crane boom simultaneously.

The utility model discloses a first aspect discloses a crane jib for the hoist, including the main jib festival and be used for with the end part of the end connection of main jib festival, the end part includes arm head subassembly and/or is used for connecting the main jib festival with the end connecting piece of the body of hoist, the end part with when the main jib festival is connected, the end part with the size of the contained angle of main jib festival is adjustable.

In some embodiments of the present invention, the,

when the end part is connected with the main arm joint, the connecting point of the end part and the main arm joint, which is positioned on the same straight line of the first side, is hinged with the main arm joint, and the rest connecting points are connected with the main arm joint through an angle adjusting part with adjustable length; or

When the end part is connected with the main arm section, the connection points of the end part and the main arm section are connected with the main arm section through the angle adjusting part with the adjustable length.

In some embodiments of the present invention, the,

the end part comprises a bottom connecting piece and an arm head assembly, the bottom connecting piece and the arm head assembly are respectively positioned at two ends of the main arm section, and the size of an included angle between the bottom connecting piece and the arm head assembly and the main arm section is adjustable.

In some embodiments, the crane boom is a single boom, and the main boom section is a single boom main body of the single boom.

The utility model discloses the second aspect discloses a modular cantilever crane, including arbitrary crane cantilever crane.

In some embodiments, the crane boom is a single boom, and the main boom section is a single boom main body; the combined type arm support is provided with a first tonnage hoisting mode and a second tonnage hoisting mode, the combined type arm support comprises a plurality of bottom connectors, and the bottom connectors comprise first side connectors, second side connectors and bottom connectors;

in the first tonnage hoisting mode, the plurality of single boom main bodies form more than one boom group, each boom group comprises one bottom connector and two single boom main bodies, bottom connectors of the bottom connectors are respectively and fixedly connected with the first side connectors and the second side connectors, the first side connectors are fixedly connected with the first end of one of the two single boom main bodies, and the second side connectors are fixedly connected with the first end of the other of the two single boom main bodies;

when the first tonnage hoisting mode is switched to the second tonnage hoisting mode, a first side connecting piece and a second side connecting piece of the bottom connecting head are separated from the single boom frame main body and the bottom connecting piece, one of the two single boom frame main bodies of the boom frame group is detached, and the bottom connecting piece is fixedly connected with the first end of the rest single boom frame main body.

In some embodiments, the first side connector, the bottom connector and the second side connector are all tapered members, in the first tonnage hoisting mode, a side surface of the first side connector and a side surface of the second side connector of the bottom connector are respectively and fixedly connected with two side surfaces of the bottom connector, and a bottom surface of the first side connector and a bottom surface of the second side connector are respectively and fixedly connected with the first end of the corresponding single boom main body; in the second tonnage hoisting mode, the bottom surface of the bottom connecting piece is fixedly connected with the first end of the rest single boom frame main body.

In some embodiments, the modular boom comprises a plurality of said arm head assemblies, said arm head assemblies comprising a top connector and a plurality of arm heads, said top connector comprising a third side connector, a top connector for connecting to said arm heads and a fourth side connector;

in the first tonnage hoisting mode, the jib group further comprises a top connector and an jib head, wherein a top connector of the top connector is fixedly connected with a third side connector and a fourth side connector respectively, the third side connector is fixedly connected with the second end of one of the two single jib main bodies, the fourth side connector is fixedly connected with the second end of the other of the two single jib main bodies, and one end of the top connector is fixedly connected with the jib head;

when the first tonnage hoisting mode is switched to the second tonnage hoisting mode, a third side connecting piece and a fourth side connecting piece of a top connecting head of the jib group are separated from the two jib main bodies and the top connecting piece, and the top connecting piece is fixedly connected between the second end of the rest jib main bodies and one jib head.

In some embodiments, the crane further comprises a plurality of boom body connectors, wherein in the first tonnage hoist mode, the plurality of single boom bodies form a plurality of boom sets, and the plurality of boom body connectors are used for connecting the plurality of boom sets; when the first tonnage hoisting mode is switched to the second tonnage hoisting mode, the inter-arm connecting piece is connected with the rest single arm support main bodies.

In some embodiments, the modular boom comprises eight of the monocoque boom bodies;

in the first tonnage hoisting mode, the eight single boom main bodies form four boom groups, each of the four boom groups comprises a first boom group and a second boom group which are parallel to each other, and a third boom group and a fourth boom group which are parallel to each other, the two single boom main bodies of the first boom group and the two single boom main bodies of the second boom group are arranged in a shape like a Chinese character 'tian', the two single boom main bodies of the third boom group and the two single boom main bodies of the fourth boom group are arranged in a shape like a Chinese character 'tian', the second boom group and the third boom group are positioned on the inner sides of the first boom group and the fourth boom group, the multiple inter-boom connecting pieces comprise a first inter-boom connecting piece and a second inter-boom connecting piece, the first inter-boom connecting piece connects one of the two single boom main bodies of the second boom group with one of the single boom main bodies adjacent to the single boom main bodies The second inter-arm connecting piece is connected with the other one of the two single-arm frame main bodies of the second arm frame group and the other single-arm frame main body of the third arm frame group adjacent to the single-arm frame main body;

when the first tonnage hoisting mode is switched to the second tonnage hoisting mode, one of the two single boom main bodies of the first boom group, the two single boom main bodies of the second boom group, the two single boom main bodies of the third boom group and the two single boom main bodies of the fourth boom group which are positioned on the same side is dismounted.

The third aspect of the utility model discloses a crane, including body and arbitrary combination formula cantilever crane.

In some embodiments, a bottom connector of the modular boom on the crane is articulated with the body in both a first tonnage sling mode and a second tonnage sling mode.

Based on the utility model provides a crane jib, crane jib's end connecting piece or arm head subassembly and the contained angle size of main arm festival are adjustable to can satisfy the different multiple type hoist of contained angle requirement, the function type is many, and the range of application is wide.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without undue limitation to the invention. In the drawings:

fig. 1 is a schematic structural diagram of a crane boom according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the crane boom shown in fig. 1 after the size of an included angle between the end part and the main boom section is adjusted;

FIG. 3 is an enlarged view of a portion of the crane boom shown in FIG. 2;

FIG. 4 is an enlarged view of a portion of the crane boom shown in FIG. 2;

FIG. 5 is a schematic structural view of a connecting joint of the crane boom shown in FIG. 1;

fig. 6 is a schematic front view of the combined boom in the first tonnage suspended load mode according to the embodiment of the present invention;

fig. 7 is a schematic top view of the combined boom shown in fig. 6;

fig. 8 is an enlarged schematic view of a part of the structure of the combined arm support shown in fig. 6;

fig. 9 is a front view of the combined boom shown in fig. 6 in a second tonnage lifting mode;

fig. 10 is a schematic top view of a part of the structure of the combined boom shown in fig. 9;

fig. 11 is a front view of the combined boom shown in fig. 6 in a third tonnage hoisting mode;

fig. 12 is a schematic top view of a part of the structure of the combined boom shown in fig. 11;

fig. 13 is a schematic structural view of a bottom connector of the combined boom shown in fig. 6;

fig. 14 is a schematic structural view of a top connector of the combined boom shown in fig. 6;

fig. 15 is a schematic structural diagram of a first connection joint of a single boom main body of the combined boom shown in fig. 6;

fig. 16 is a schematic structural view of a crane according to another embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 5, the crane boom of the present embodiment is used for a crane. The crane arm support comprises a main arm section and an end part used for being connected with the end part of the main arm section, the end part comprises an arm head assembly and/or a bottom connecting piece 112 used for connecting the main arm section and the body 2 of the crane, and when the end part is connected with the main arm section, the size of an included angle between the end part and the main arm section can be adjusted.

The body of the crane refers to the main part of the crane, in this embodiment to the part of the crane other than the crane boom.

In the embodiment shown in fig. 1 and 2, the end members include an arm head assembly and a base connector 112. In the crane, the included angles between the boom head assemblies or the bottom connecting pieces 112 of different types of crane booms and the main boom sections are different. For example, in a crane boom as a boom, an angle between a head assembly for mounting a hoisting member such as a hoisting pulley and a main boom section is usually 0, and an angle between a bottom connecting member 112 for mounting the boom to the crane and the main boom section is also 0. When the crane comprises a main arm and an auxiliary arm, and the crane boom is an a-shaped main arm as shown in fig. 6 to 12, the included angle between the arm head assembly and the bottom connecting member 112 and the main arm section is not 0, and the included angles between the arm head assembly and the bottom connecting member 112 and the main arm section of the a-shaped main arm of cranes with different tonnages or types are often different.

In the crane boom of the embodiment, the size of the included angle between the bottom connecting piece 112 or the boom head assembly of the crane boom and the main boom section is adjustable, and in some occasions, the crane boom can be switched to be used as a crane boom and an a-shaped main boom by adjusting the included angle between the boom head assembly of the crane boom and the main boom section and the included angle between the bottom connecting piece 112 of the crane boom and the main boom section. The requirements of A-shaped main arms of various cranes can be met by adjusting the included angles between the arm head component of the crane arm support of the A-shaped main arm and the bottom connecting piece 112 and the main arm section. The crane boom has multiple functional types and a wide application range.

In some embodiments, as shown in fig. 3, 4 and 8, when the end piece is coupled to the main arm section, of the coupling points at which the end piece is coupled to the main arm section, the coupling points located on the same straight line on the first side are hinged to the main arm section, and the remaining coupling points are coupled to the main arm section by the length-adjustable angle-adjusting piece 20.

In this embodiment, when the crane jib is adjusted in angle, the end part rotates around the axis at the hinge point, the connection point on the same straight line on the first side, that is, the connection point on the rotation axis of the end part, includes the hinge point 30, the connection point on the rotation axis of the end part may include one or more connection points, that is, the hinge point 30 may include one or more connection points, in the illustrated embodiment, the crane jib is a rectangular jib, the connection points of the end part and the main jib section have four connection points, one of the four connection points is the hinge point 30, and the other two connection points are connected to the main jib section through the angle connector 20. By adjusting the length of the angle adjusting member 20, the end member is rotated about the rotation axis. The adjustment of the length of the angle adjusting member 20 can be achieved by replacing angle adjusting members having different lengths, by using a telescopic angle adjusting member, or the like. The telescopic angle adjusting piece can adopt mechanisms such as a telescopic oil cylinder and an air cylinder, the angle adjusting piece can further comprise two sliding pieces capable of sliding relatively and a fixing piece for fixing the relative positions of the two sliding pieces, and the length of the angle adjusting piece is adjusted by fixing the two sliding pieces at different relative positions by using the fixing piece.

In some embodiments, when the end piece is connected to the main arm section, the connection points of the end piece to the main arm section are each connected to the main arm section by a length adjustable angle adjuster 20. In this embodiment, all the connection points of the end part are connected to the main arm section through the angle adjusting part 20, and when the included angle between the end part and the main arm section is adjusted, the end part can be rotated relative to the main arm section by adjusting the lengths of the different angle adjusting parts 20 to adjust the included angle.

In some embodiments, the end member includes a base connector 112 and an arm head assembly, the base connector 112 and the arm head assembly are respectively located at two ends of the main arm section, and the included angle between the base connector 112 and the arm head assembly and the main arm section is adjustable.

In some embodiments, as shown in fig. 1 to 4, the crane boom is a single boom, and the main boom section is a single boom body 12 of the single boom.

In some embodiments, a combined boom 1 is further disclosed, comprising any one of the crane booms described above.

In some embodiments, as shown in fig. 6 to 16, the crane boom is a single boom, and the main boom section is a single boom body 12; the combined type arm support 1 has a first tonnage hoisting mode and a second tonnage hoisting mode, the combined type arm support 1 comprises a plurality of bottom connectors 11, and the bottom connectors 11 comprise first side connectors 111, second side connectors 113 and bottom connectors 112.

In a first tonnage hoisting mode, a plurality of single boom main bodies 12 form more than one boom group, each boom group comprises a bottom connector 11 and two single boom main bodies 12, a bottom connector 112 of the bottom connector 11 is respectively and fixedly connected with a first side connector 111 and a second side connector 113, the first side connector 111 is fixedly connected with a first end of one of the two single boom main bodies 12, and the second side connector 113 is fixedly connected with a first end of the other of the two single boom main bodies 12;

when the first-tonnage hoisting mode is switched to the second-tonnage hoisting mode, the first side connecting piece 111 and the second side connecting piece 113 of the bottom connecting head 11 are separated from the single-boom main body 12 and the bottom connecting piece 112, one of the two single-boom main bodies 12 of the boom group is detached, and the bottom connecting piece 112 is fixedly connected with the first ends of the rest single-boom main bodies 12.

The bottom connection head 11, as shown in fig. 13, includes a first side connection member 111, a second side connection member 113, and a bottom connection member 112 for connection with the body 2 of the crane. When the combined boom 1 is mounted on the crane, one end of the bottom connector 112 is connected with the body 2 of the crane, so that the single boom main body 12 connected with the bottom connector 11 is mounted on the crane.

The single arm support is used for lifting heavy objects, and can be used as an arm support unit for lifting the heavy objects generally. The single arm frame main body 12 is a main body arm section part of the single arm frame. Fig. 6 and 7 show 8 boom bodies 12, fig. 9 and 10 show 4 boom bodies 12, and fig. 11 and 12 show two boom bodies 12.

One boom group comprises two boom main bodies 12, so that when the combined boom 1 comprises two boom main bodies 12, a 1 boom group is formed in the first tonnage hoist mode, and when the combined boom 1 comprises 8 boom main bodies 12 as shown in fig. 6 and 7, 8 boom main bodies 12 form a 4 boom group in the first tonnage hoist mode.

In the first tonnage hoisting mode, as shown in fig. 6 and 7, the bottom connector 112 of the bottom connector 11 is fixedly connected to the first side connector 111 and the second side connector 113, respectively, the first side connector 111 is fixedly connected to the first end of one jib main body 12, and the second side connector 113 is fixedly connected to the first end of the other jib main body 12. Therefore, one bottom connector 11 is fixedly connected with two single-boom main bodies 12 at the same time, and the two single-boom main bodies 12 can be installed on the crane through one bottom connector 112.

As shown in fig. 9 and 10, when the first-tonnage hoisting mode is switched to the second-tonnage hoisting mode and the corresponding operating mode of the crane is changed from the large-tonnage operating mode to the small-tonnage operating mode, the half-jib main body 12 of the combined jib mounted on the crane is removed. In this embodiment, the removing manner is to remove one of the two single boom main bodies 12 of each boom group, and only one single boom main body 12 is reserved. In the first tonnage lifting mode, the number of the bottom connecting pieces 112 is half of the number of the single boom main bodies 12, when the second tonnage lifting mode is switched, the number of the bottom connecting pieces 112 is exactly the same as the number of the remaining single boom main bodies 12, at this moment, the first ends of the remaining single boom main bodies 12 are not connected with the first side connecting pieces 111 or the second side connecting pieces 113 any more, but are directly connected with the bottom connecting pieces 112, the connection between the bottom connecting pieces 112 and the crane main body 12 does not need to be detached during the connection, and the mode switching is convenient.

On the contrary, when the combined boom 1 is switched from the second tonnage hoisting mode to the first tonnage hoisting mode, the bottom connector 112 is firstly separated from the single boom main bodies 12, and then the two single boom main bodies 12 are connected to the crane through the first side connector 111 and the second side connector 113.

The combined type arm support 1 of the embodiment can enable the combined type arm support 1 to be in a first tonnage hoisting mode when a large tonnage working mode of the crane is required, and can switch the combined type arm support 1 to a second tonnage hoisting mode when a small tonnage working mode of the crane is required. By switching the combined type arm support 1 to different tonnage hoisting modes, the requirements of different working tonnages of the crane can be matched. The single boom main body 12 is connected to the crane by arranging the bottom connector 11 comprising the first side connector 111, the second side connector 113 and the bottom connector 112, and when in a first tonnage hoisting mode, the two single boom main bodies 12 are simultaneously connected to the bottom connector 112 through the first side connector 111 and the second side connector 113 so as to be connected with the crane body 2, so that the connection is convenient. When the first-tonnage hoisting mode is switched to the second-tonnage hoisting mode, after one single-boom frame main body 12 of the boom frame set is detached, the bottom connecting piece 112 of the boom frame set can be directly connected with the rest single-boom frame main bodies 12, other connecting parts do not need to be added or replaced, and the connection is convenient and reliable.

In some embodiments, the first side connector 111, the bottom connector 112, and the second side connector 113 are all tapered members, in the first tonnage hoisting mode, the side surface of the first side connector 111 and the side surface of the second side connector 113 of the bottom connector 11 are respectively and fixedly connected to the two side surfaces of the bottom connector 112, and the bottom surface of the first side connector 111 and the bottom surface of the second side connector 113 are respectively and fixedly connected to the first end of the corresponding single boom main body 12; in the second tonnage lifting mode, the bottom surface of the bottom connecting member 112 is fixedly connected with the first end of the remaining single boom main body 12. By providing the first side connecting member 111, the bottom connecting member 112 and the second side connecting member 113 as tapered members and connecting them in the manner of this embodiment, the structure of the bottom connecting head 11 can be made firm and compact, which facilitates the simultaneous connection of the two single boom head main bodies 12 to the crane.

In some embodiments, as shown in fig. 6, 7 and 14, the combined boom 1 further comprises a plurality of arm head assemblies, each arm head assembly comprises a top connector 13 and an arm head 14, and the top connector 13 comprises a third side connector 131, a top connector 132 for connecting with the arm head 14 and a fourth side connector 133. The combined arm support 1 of the embodiment can be directly used as a lifting arm for lifting heavy objects, and at the moment, the arm head is used for installing lifting pieces of a lifting device, such as a lifting pulley and the like. In some embodiments, not shown, the combined boom 1 may also be used as a main boom, when the crane comprises a main boom and an auxiliary boom, and the boom head is used for mounting the auxiliary boom.

In the first tonnage hoisting mode, the jib group further comprises a top connector 13 and an jib head 14, wherein a top connector 132 of the top connector 13 is fixedly connected with a third side connector 131 and a fourth side connector 133 respectively, the third side connector 131 is fixedly connected with the second end of one of the two single jib main bodies 12, the fourth side connector 133 is fixedly connected with the second end of the other of the two single jib main bodies 12, and one end of the top connector 132 is fixedly connected with the jib head 14;

when the first-tonnage hoisting mode is switched to the second-tonnage hoisting mode, the third side connector 131 and the fourth side connector 133 of the top connector 13 of the boom set are separated from both the two boom main bodies 12 and the top connector 132, and the top connector 132 is fixedly connected between the second end of the remaining boom main body 12 and one boom head 14. The top connector 13 of the present embodiment is similar to the bottom connector 11 in structure and is divided into three parts, in the first tonnage hoisting mode, the number of the top connectors 132 is half of the number of the single boom main bodies 12, when the second tonnage hoisting mode is switched, the number of the top connectors 132 is exactly the same as the number of the remaining single boom main bodies 12, at this time, the second ends of the remaining single boom main bodies 12 are not connected with the third side connector 131 or the fourth side connector 133 any more, but are directly connected with the top connectors 132, when the top connectors 132 are connected with the boom heads 14, the connection between the top connectors 132 and the boom heads 14 does not need to be removed, and the mode switching is more convenient.

In some embodiments, as shown in fig. 6 to 12, the combined boom 1 further includes a plurality of inter-arm connectors 15, in the first tonnage suspended load mode, the plurality of single boom main bodies 12 form a plurality of boom groups, the plurality of inter-arm connectors 15 are used for connecting the plurality of boom groups, and the plurality of inter-arm connectors 15 connect the boom groups to each other, so that the plurality of boom groups can form a whole, and the rigidity and performance of the whole combined boom 1 can be improved.

When the first-tonnage hoisting mode is switched to the second-tonnage hoisting mode, after part of the single-boom frame main bodies 12 are detached, only one single-boom frame main body 12 is left in each boom frame group, and the inter-arm connecting pieces 15 are connected with the remaining single-boom frame main bodies 12, so that the remaining single-boom frame main bodies 12 form a whole.

In some embodiments, as shown in fig. 6 and 7, the combined boom 1 comprises eight single boom bodies 12;

in the first tonnage lifting mode, the eight single boom main bodies 12 form four boom groups, which include a first boom group 21 and a second boom group 22 that are parallel to each other, and a third boom group 23 and a fourth boom group 24 that are parallel to each other. Parallel to each other means that the arrangement directions of the two arm support groups are the same, and as shown in the figure, the bottom connector 11, the single arm support main body 12 and the top connector 13 of the arm support groups which are parallel to each other are respectively and substantially parallel.

The two single-boom main bodies 12 of the first boom group 21 and the two single-boom main bodies 12 of the second boom group 22 are arranged in a shape like a Chinese character 'tian', and the two single-boom main bodies 12 of the third boom group 23 and the two single-boom main bodies 12 of the fourth boom group 24 are arranged in a shape like a Chinese character 'tian'.

The two single-boom main bodies 12 of the first boom group 21 and the two single-boom main bodies 12 of the second boom group 22 are arranged in a grid shape, which means that the cross sections of the two single-boom main bodies 12 of the first boom group 21, which are connected with the single-boom main bodies 12 of the first boom group and the two single-boom main bodies 12 of the second boom group, which are totally four single-boom main bodies 12, are in a grid shape, the four single-boom main bodies 12 are parallel to each other, one single-boom main body 12 of the first boom group 21 is adjacent to one single-boom main body 12 of the second boom group, and the other single-boom main body 12 of the first boom group 21 is adjacent to the other single-boom main body 12 of the second boom group. The two single-boom main bodies 12 of the third boom group 23 and the two single-boom main bodies 12 of the fourth boom group 24 are arranged in a shape like a Chinese character 'tian'.

As shown in fig. 7, the second arm support group 22 and the third arm support group 23 are arranged in an a shape, that is, the single arm support body 12 of the second arm support group 22 and the third arm support group 33 are arranged at a small included angle, similar to an "a" shape, and the second arm support group 22 and the third arm support group 23 are located inside the first arm support group 21 and the fourth arm support group 24.

The multiple inter-arm connectors 15 comprise first inter-arm connectors 15 and second inter-arm connectors 15, the first inter-arm connectors 15 are connected with one of the two single-arm-frame main bodies 12 of the second arm frame group 22 and the single-arm-frame main body 12 of the third arm frame group 23 adjacent to the single-arm-frame main body 12, and the second inter-arm connectors 15 are connected with the other of the two single-arm-frame main bodies 12 of the second arm frame group 22 and the other single-arm-frame main body 12 of the third arm frame group 23 adjacent to the single-arm-frame main body 12;

when the first-tonnage hoisting mode is switched to the second-tonnage hoisting mode, one of the two single-boom main bodies 12 of the first boom group 21, the two single-boom main bodies 12 of the second boom group 22, the two single-boom main bodies 12 of the third boom group 23 and the two single-boom main bodies 12 of the fourth boom group 24, which are located on the same side, is removed. The combined type arm support of the embodiment is provided with eight single-arm support main bodies 12 in total, the combined type arm support is in an A shape under a first tonnage hoisting mode, four single-arm support main bodies 12 are arranged in a field shape on one side of the A shape, and four single-arm support main bodies 12 are arranged in a field shape on the other side of the A shape. Because the single-boom main bodies 12 of the second boom group 22 and the third boom group 33 which are positioned on the same side are connected with each other in the first-tonnage hoisting mode, the single-boom main bodies 12 on the same side are detached when the second-tonnage hoisting mode is switched, and the rest single-boom main bodies 12 can still keep the connection of the inter-boom connecting pieces, so that the mode switching is more convenient and simpler.

In some embodiments, as shown in fig. 11 and 12, the combined boom 1 further comprises a third tonnage hoisting mode, and when the second tonnage hoisting mode is switched to the third tonnage hoisting mode, two boom bodies 12 located at the outer side of the four boom bodies 12 in the second tonnage hoisting mode are removed.

In some embodiments, as shown in fig. 6 to 12, the single arm support body 12 includes a first transition joint 122 connected between the first connecting joint 121 and the standard joint 123, and a second transition joint 124 connected between the standard joint 123 and the second connecting joint 125. As shown in fig. 15, in the first tonnage lifting mode, the first connection joints 121 of the two boom main bodies 12 of the boom group are connected by the inter-arm connection joint 15.

In some embodiments, as shown in fig. 5, the first connecting joint 121 and the second connecting joint 125 include a first connector 1213 disposed along the axial direction and a second connector 1211 and a third connector 1212 disposed along both sides of the cross section, and the first connector 1213, the second connector 1211 and the third connector 1212 are disposed such that the first connecting joint 121 and the second connecting joint 125 are connected to the other connecting joint in the axial direction and in both sides of the cross section to extend.

In some embodiments, the crane further comprises a body 2 and any one of the combined arm supports 1.

In some embodiments, the combined boom 1 is hinged to the body 2 at the bottom connector 112 on the crane in both the first tonnage sling mode and the second tonnage sling mode.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims

1. A crane jib for a crane, comprising a main jib portion and an end member for connecting with an end of the main jib portion, wherein the end member comprises a jib head assembly and/or a bottom connecting member (112) for connecting the main jib portion with a body (2) of the crane, and when the end member is connected with the main jib portion, an included angle between the end member and the main jib portion is adjustable.

2. The crane jib of claim 1,

3. The crane jib of claim 1,

the end part comprises a bottom connecting piece (112) and an arm head assembly, the bottom connecting piece (112) and the arm head assembly are respectively positioned at two ends of the main arm section, and the size of an included angle between the bottom connecting piece (112) and the arm head assembly and the main arm section is adjustable.

4. The crane jib as claimed in claim 1, characterized in that the crane jib is a single jib and the main jib section is a single jib body (12) of the single jib.

5. A modular boom comprising a plurality of crane booms as claimed in any one of claims 1 to 4.

6. The combined boom according to claim 5, characterized in that the crane boom is a single boom, the main boom section being a single boom body (12); the combined type arm support is provided with a first tonnage hoisting mode and a second tonnage hoisting mode, the combined type arm support comprises a plurality of bottom connectors (11), and each bottom connector (11) comprises a first side connector (111), a second side connector (113) and a bottom connector (112);

in the first tonnage hoisting mode, the plurality of single boom main bodies (12) form more than one boom group, the boom group comprises one bottom connector (11) and two single boom main bodies (12), a bottom connector (112) of the bottom connector (11) is respectively and fixedly connected with a first side connector (111) and a second side connector (113), the first side connector (111) is fixedly connected with a first end of one of the two single boom main bodies (12), and the second side connector (113) is fixedly connected with a first end of the other of the two single boom main bodies (12);

when the first-tonnage hoisting mode is switched to the second-tonnage hoisting mode, a first side connecting piece (111) and a second side connecting piece (113) of the bottom connecting head (11) are separated from the single-boom main body (12) and the bottom connecting piece (112), one of the two single-boom main bodies (12) of the boom group is detached, and the bottom connecting piece (112) is fixedly connected with the first ends of the rest single-boom main bodies (12).

7. The combined type boom frame according to claim 6, wherein the first side connector (111), the bottom connector (112) and the second side connector (113) are all conical members, in the first tonnage hoisting mode, the side surface of the first side connector (111) and the side surface of the second side connector (113) of the bottom connector (11) are respectively and fixedly connected with the two side surfaces of the bottom connector (112), and the bottom surface of the first side connector (111) and the bottom surface of the second side connector (113) are respectively and fixedly connected with the first end of the corresponding single boom main body (12); in the second tonnage hoisting mode, the bottom surface of the bottom connecting piece (112) is fixedly connected with the first end of the rest single boom frame main body (12).

8. The modular boom of claim 6, further comprising a plurality of said arm head assemblies, said arm head assemblies comprising a top connector and an arm head (14), said top connector comprising a third side connector (131), a top connector (132) for connecting to said arm head (14) and a fourth side connector (133);

in the first tonnage hoisting mode, the jib group further comprises a top connector and an jib head (14), wherein a top connector (132) of the top connector is fixedly connected with a third side connector (131) and a fourth side connector (133) respectively, the third side connector (131) is fixedly connected with a second end of one of the two jib main bodies (12), the fourth side connector (133) is fixedly connected with a second end of the other of the two jib main bodies (12), and one end of the top connector (132) is fixedly connected with the jib head (14);

when the first tonnage hoisting mode is switched to the second tonnage hoisting mode, a third side connecting piece (131) and a fourth side connecting piece (133) of a top connecting piece of the jib group are separated from the two single jib main bodies (12) and the top connecting piece (132), and the top connecting piece (132) is fixedly connected between the second end of the rest single jib main body (12) and one jib head (14).

9. The modular boom of claim 6, further comprising a plurality of inter-arm connectors, wherein in the first tonnage hoist mode, the plurality of single boom bodies (12) form a plurality of said boom sets, the plurality of inter-arm connectors for connecting the plurality of boom sets; when the first tonnage hoisting mode is switched to the second tonnage hoisting mode, the inter-arm connecting piece is connected with the rest single-arm support main bodies (12).

10. A modular boom according to claim 9, characterized in that it comprises eight of said single boom bodies (12);

in the first tonnage hoisting mode, the eight single boom frame main bodies (12) form four boom frame groups, the four boom frame groups comprise a first boom frame group and a second boom frame group which are parallel to each other and a third boom frame group and a fourth boom frame group which are parallel to each other, the two single boom frame main bodies (12) of the first boom frame group and the two single boom frame main bodies (12) of the second boom frame group are arranged in a shape like a Chinese character 'tian', the two single boom frame main bodies (12) of the third boom frame group and the two single boom frame main bodies (12) of the fourth boom frame group are arranged in a shape like a Chinese character 'tian', the second boom frame group and the third boom frame group are arranged in a shape like a Chinese character 'a', the second boom frame group and the third boom frame group are positioned at the inner sides of the first boom frame group and the fourth boom frame group, and the multi-arm connecting pieces comprise a first inter-arm connecting piece and a second inter-arm connecting piece, the first inter-arm connecting piece is connected with one of the two single-arm-frame main bodies (12) of the second arm frame group and the single-arm-frame main body (12) of the third arm frame group adjacent to the single-arm-frame main body (12), and the second inter-arm connecting piece is connected with the other of the two single-arm-frame main bodies (12) of the second arm frame group and the other single-arm-frame main body (12) of the third arm frame group adjacent to the single-arm-frame main body (12);

when the first tonnage hoisting mode is switched to the second tonnage hoisting mode, one of the two single boom main bodies (12) of the first boom group, the two single boom main bodies (12) of the second boom group, the two single boom main bodies (12) of the third boom group and the two single boom main bodies (12) of the fourth boom group, which are positioned on the same side, is detached.

11. A crane, characterized in that it comprises a body (2) as claimed in any one of claims 6 to 10.

12. A crane according to claim 11, characterized in that the bottom connection (112) of the modular boom on the crane is hinged to the body (2) in both the first and second tonnage sling modes.