CN216662315U - Truss arm and crane - Google Patents
Truss arm and crane Download PDFInfo
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- CN216662315U CN216662315U CN202122728570.0U CN202122728570U CN216662315U CN 216662315 U CN216662315 U CN 216662315U CN 202122728570 U CN202122728570 U CN 202122728570U CN 216662315 U CN216662315 U CN 216662315U
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- truss arm
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Abstract
The utility model discloses a truss arm and a crane, which belong to the technical field of crane structures and comprise a plurality of main chord assemblies, a first web member assembly and a second web member assembly; the main chord component comprises a plurality of main chords which are connected end to end, and the strength of the main chord close to the head end is greater than that of the main chord close to the tail end; the first web member assembly is arranged on the left side and the right side of the truss arm, the second web member assembly is arranged on the upper side or the lower side of the truss arm, the first web member assembly comprises a plurality of first web members, the second web member assembly comprises a plurality of second web members, the first web members and the second web members are respectively connected with the adjacent main chord assemblies, and the strength of the first web member assembly is greater than that of the second web member assembly; the weight redundancy of each component is avoided, the lightweight design is realized on the premise that the bearing capacity is unchanged, or the bearing capacity is improved on the premise that the weight and the cost are unchanged.
Description
Technical Field
The utility model relates to a truss arm and a crane, and belongs to the technical field of crane structures.
Background
The truss crane is one of typical devices of a mobile crane, has the advantages of super-strong hoisting capacity, small ground pressure, flexible and changeable boom combination modes, capability of walking with load and the like, and is widely applied to large-scale engineering hoisting projects such as nuclear power industry, petrochemical industry, port construction, bridge hoisting and the like; in the actual engineering, the working environment is complex and various, the working condition randomness is large, heavy load is born, and the requirement on the rationality of the structural design of the truss arm is higher and higher; due to the unique advantages of the truss structure, the truss structure is more and more applied to the crane arm joint structure, and in order to meet the requirements of larger and larger lifting loads, the truss structure of the crane truss arm is more and more complicated; the truss type arm frame structure is widely applied, and the stress characteristics of the arm section structure and the stability of the arm frame are paid more and more attention.
In the prior art, main chord members or web members at different positions of the truss arm are manufactured in a unified specification, so that weight redundancy is caused, and the requirement of designing light weight of the truss arm cannot be met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a truss arm and a crane, which avoid the weight redundancy of each component, realize light weight design on the premise of ensuring the bearing capacity to be unchanged, or realize the improvement of the bearing capacity on the premise of ensuring the weight and the cost to be unchanged.
In order to realize the purpose, the utility model is realized by adopting the following technical scheme:
in a first aspect, the present invention provides a truss arm comprising a plurality of main chord assemblies, a first web assembly and a second web assembly; the main chord component comprises a plurality of main chords which are connected end to end, and the strength of the main chord close to the head end is greater than that of the main chord close to the tail end; the left and right sides of truss arm are located to first web member subassembly, and the last downside or the downside of truss arm are located to the second web member subassembly, and first web member subassembly includes a plurality of first web members, and the second web member subassembly includes a plurality of second web members, and adjacent main chord member subassembly is connected respectively to first web member and second web member, and the intensity of first web member subassembly is greater than the intensity of second web member subassembly.
With reference to the first aspect, further, the strength of the main chord near the head end is greater than that of the main chord near the tail end, which is achieved by the diameter of the main chord near the head end being greater than that of the main chord near the tail end.
With reference to the first aspect, further, the main chords are connected with each other through core pipes.
In combination with the first aspect, further, the strength of the first web member assembly is greater than the strength of the second web member assembly, and this is achieved by the number of the first web members being greater than the number of the second web members.
With reference to the first aspect, further, the strength of the first web member assembly is greater than the strength of the second web member assembly by the diameter of the first web member being greater than the diameter of the second web member.
In a second aspect, the utility model further provides a crane, which comprises the truss arm in any one of the first aspects, and further comprises an arm head and a rotating frame, wherein the tail end of the truss arm is connected with the arm head, the head end of the truss arm is connected with the rotating frame, and the rotating frame, the truss arm and a pulley block on the arm head are matched to realize hoisting.
Compared with the prior art, the utility model has the following beneficial effects:
according to the truss arm and the crane, the main chord assemblies are arranged into a plurality of main chords which are connected end to end, the closer the main chord assemblies are to the head end, the larger the stress is, the stronger the strength of the main chord close to the head end is, the strength of the main chord close to the tail end is, and the weight redundancy condition that the main chord assemblies are a whole pipe is avoided; the first web member assembly comprises a plurality of first web members, the second web member assembly comprises a plurality of second web members, the first web members and the second web members are respectively connected with adjacent main chord members, the first web member assembly is arranged on the left side and the right side of the truss arm, the second web member assembly is arranged on the upper side or the lower side of the truss arm, the stress of the first web member assembly is greater than that of the second web member assembly in the hoisting process, the strength of the first web member assembly is set to be greater than that of the second web member assembly, and the weight redundancy brought by the unified specification design of the two web member assemblies is avoided; in summary, the truss arm and the crane provided by the utility model can realize light weight design on the premise of ensuring that the bearing capacity is not changed, or realize improvement of the bearing capacity on the premise of ensuring that the weight and the cost are not changed.
Drawings
Fig. 1 is a schematic structural diagram of a truss arm provided in an embodiment of the utility model;
fig. 2 is a schematic structural view of a head end of a truss arm according to an embodiment of the utility model.
In the figure: 1. a main chord assembly; 1-1, a main chord; 2. a first web member assembly; 3. a second web member assembly; 4. a core tube; 5. and a reinforcing component.
Detailed Description
The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
Example one
As shown in fig. 1, a truss arm according to an embodiment of the present invention includes four main chord members 1, two first web members 2 and two second web members 3, where the two first web members 2 are disposed on left and right sides of the truss arm and respectively connected to the adjacent main chord members 1, and the two second web members 3 are disposed on upper and lower sides of the truss arm and respectively connected to the adjacent main chord members 1.
As shown in FIG. 1, a main chord component 1 consists of two main chords 1-1, and the main chords 1-1 are connected by a core pipe 4; the strength of the main chord 1-1 close to the head end of the truss arm is greater than that of the main chord 1-1 close to the tail end of the truss arm, under the condition of adopting the same material, the strength of the main chord 1-1 is realized by selecting the diameter of the main chord 1-1, and the diameter of the main chord 1-1 close to the head end of the truss arm is greater than that of the main chord 1-1 close to the tail end of the truss arm; the stress of the head end of the main chord component 1 is larger than that of the tail end of the main chord component 1 in the hoisting process, the main chord component 1-1 butt joint design provided by the embodiment of the utility model can effectively avoid the weight redundancy condition of the main chord component 1, and the lightweight design is realized on the premise of ensuring the unchanged bearing capacity, or the bearing capacity is improved on the premise of ensuring the unchanged weight and cost.
The first web member assembly 2 comprises a plurality of first web members which are connected with two adjacent main chord assemblies 1, the second web member assembly 3 comprises a plurality of second web members which are connected with two adjacent main chord assemblies 1, and the first web members and the second web members are oblique rods; the stress of the second web member assemblies 3 positioned on the upper side and the lower side of the truss arm is smaller in the hoisting process, the stress of the first web member assemblies 2 positioned on the left side and the right side of the truss arm is larger in the hoisting process, the strength of the first web member assemblies 2 is larger than that of the second web member assemblies 3, and the weight redundancy caused by the unified specification design of the two web member assemblies can be effectively avoided.
Under the condition of adopting the same material, the strength of the first web member assembly 2 is greater than that of the second web member assembly 3, and the strength is realized by the fact that the number of the first web members is greater than that of the second web members, or the diameter of the first web members is greater than that of the second web members; the variable-density design of the web member provided by the embodiment of the utility model realizes light weight design on the premise of ensuring the unchanged bearing capacity, or realizes the improvement of the bearing capacity on the premise of ensuring the unchanged weight and cost.
As shown in fig. 2, a reinforcing component 5 can be additionally arranged at a position of the main chord component 1 close to the head end of the truss arm to increase the local strength so as to adapt to the situation of large local stress in the hoisting process.
Example two
The crane provided by the embodiment of the utility model comprises the truss arm, an arm head and a rotating frame, wherein the tail end of the truss arm is connected with the arm head, the head end of the truss arm is connected with the rotating frame, and the rotating frame, the truss arm and a pulley block on the arm head are matched to realize hoisting.
As shown in fig. 1, the truss arm includes four main chord members 1, two first web members 2 and two second web members 3, the two first web members 2 are disposed on the left and right sides of the truss arm and respectively connected to the adjacent main chord members 1, and the two second web members 3 are disposed on the upper and lower sides of the truss arm and respectively connected to the adjacent main chord members 1.
As shown in FIG. 1, a main chord component 1 consists of two main chords 1-1, and the main chords 1-1 are connected by a core pipe 4; the strength of the main chord 1-1 close to the head end of the truss arm is greater than that of the main chord 1-1 close to the tail end of the truss arm, under the condition of adopting the same material, the strength of the main chord 1-1 is realized by selecting the diameter of the main chord 1-1, and the diameter of the main chord 1-1 close to the head end of the truss arm is greater than that of the main chord 1-1 close to the tail end of the truss arm; the stress of the head end of the main chord component 1 is larger than that of the tail end of the main chord component 1 in the hoisting process, the main chord component 1-1 butt joint design provided by the embodiment of the utility model can effectively avoid the weight redundancy condition of the main chord component 1, and the lightweight design is realized on the premise of ensuring the unchanged bearing capacity, or the bearing capacity is improved on the premise of ensuring the unchanged weight and cost.
The first web member assembly 2 comprises a plurality of first web members which are connected with two adjacent main chord assemblies 1, the second web member assembly 3 comprises a plurality of second web members which are connected with two adjacent main chord assemblies 1, and the first web members and the second web members are oblique rods; the stress of the second web member assemblies 3 positioned on the upper side and the lower side of the truss arm is smaller in the hoisting process, the stress of the first web member assemblies 2 positioned on the left side and the right side of the truss arm is larger in the hoisting process, the strength of the first web member assemblies 2 is larger than that of the second web member assemblies 3, and the weight redundancy caused by the unified specification design of the two web member assemblies can be effectively avoided.
Under the condition of adopting the same material, the strength of the first web member assembly 2 is greater than that of the second web member assembly 3, and the strength is realized by the fact that the number of the first web members is greater than that of the second web members, or the diameter of the first web members is greater than that of the second web members; the variable-density design of the web member provided by the embodiment of the utility model realizes light weight design on the premise of ensuring the unchanged bearing capacity, or realizes the improvement of the bearing capacity on the premise of ensuring the unchanged weight and cost.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A truss arm comprising a plurality of main chord assemblies, a first web assembly and a second web assembly; the main chord component comprises a plurality of main chords which are connected end to end, and the strength of the main chord close to the head end is greater than that of the main chord close to the tail end; the left and right sides of truss arm are located to first web member subassembly, and the last downside or the downside of truss arm are located to the second web member subassembly, and first web member subassembly includes a plurality of first web members, and the second web member subassembly includes a plurality of second web members, and adjacent main chord member subassembly is connected respectively to first web member and second web member, and the intensity of first web member subassembly is greater than the intensity of second web member subassembly.
2. A truss arm as defined in claim 1 wherein the strength of the main chord near the head end is greater than the strength of the main chord near the tail end by the diameter of the main chord near the head end being greater than the diameter of the main chord near the tail end.
3. A truss arm as defined in claim 1 wherein said main chords are connected by a core tube.
4. A truss arm as defined in claim 1 wherein the strength of the first web member assembly is greater than the strength of the second web member assembly by the number of first web members being greater than the number of second web members.
5. A truss arm as defined in claim 1 wherein the strength of the first web member is greater than the strength of the second web member by the diameter of the first web member being greater than the diameter of the second web member.
6. A crane, comprising a truss arm as claimed in any one of claims 1 to 5, further comprising an arm head and a rotating frame, wherein the tail end of the truss arm is connected with the arm head, the head end of the truss arm is connected with the rotating frame, and the rotating frame, the truss arm and the pulley block on the arm head are matched to realize hoisting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122728570.0U CN216662315U (en) | 2021-11-09 | 2021-11-09 | Truss arm and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122728570.0U CN216662315U (en) | 2021-11-09 | 2021-11-09 | Truss arm and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216662315U true CN216662315U (en) | 2022-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122728570.0U Active CN216662315U (en) | 2021-11-09 | 2021-11-09 | Truss arm and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216662315U (en) |
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2021
- 2021-11-09 CN CN202122728570.0U patent/CN216662315U/en active Active
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