CN102502426B - Crane boom and crane - Google Patents
Crane boom and crane Download PDFInfo
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- CN102502426B CN102502426B CN201110320095.1A CN201110320095A CN102502426B CN 102502426 B CN102502426 B CN 102502426B CN 201110320095 A CN201110320095 A CN 201110320095A CN 102502426 B CN102502426 B CN 102502426B
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- jib
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- crane
- arm support
- crane arm
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Abstract
The invention discloses a crane boom, which consists of chord rods (1) and a web rod (2). The crane bom is characterized in that the number of the chord rods (1) is at least 5, and the cross section of the crane boom surrounded by the at least 5 chord rods (1) is an axisymmetric polygon with at least 5 edges. Through the technical scheme, the cross section of the crane boom is a polygonal structure larger than four edges so as to improve the strength, rigidity and stability of the crane boom under the condition that the size of the crane boom is limited. Through optimal design of the structure of the crane boom in the invention, a single crane boom structure can be used to replace common double crane boom structure in some cases, thereby not only simplifying the structure of the crane, but also reducing the cost.
Description
Technical field
The present invention relates to a kind of crane arm support and hoisting crane, particularly, relate to and a kind ofly there is the more crane arm support of high strength, rigidity, stability, and there is the hoisting crane of this jib.
Background technology
At present, the tonnage of the Design and manufacture of hoisting crane constantly increases.And jib hangs the important and direct primary structure member that carries operation as hoisting crane, should meet the lifting performance of complete machine, self intensity, rigidity and stability of elevator boom rack etc., meets elevator boom rack many-sided restriction such as size in the time of road transport again, and therefore design difficulty is more and more higher.
Conventionally, crane arm support is all to adopt insert jib section uniform cross section, the quadrangle space Yan shelf structure of two ends arm joint variable section, and wherein, chord member and web member all preferably adopt the steel pipe of round section.For this structure, as shown in Figure 1, in order to increase lifting performance and self intensity, rigidity and the stability of elevator boom rack, more conventional mode mainly contains two kinds, a kind of is the size that increases quadrangular section, increase the value of a1 and b1, another kind is diameter of steel tube Φ D1 and the steel pipe thickness t 1 that increases chord member.
But, due to the restriction of road transport to size, the size a1 of quadrangular section and b1 can not unconfinedly increase, and the diameter of steel tube Φ D1 of chord member and steel pipe thickness t 1 be subject to many-sided restriction such as welding production technique and tubing manufacturing capacity, also can not unconfined increase.
Therefore, very large for lifting tonnage, for example 3000 and the elevator boom rack product of above tonnage, the version that conventionally two jibs need to be combined and installed together meets the needs of product, for example, Figure 2 shows that H type both arms frame, Figure 3 shows that A type both arms frame.For example, but such both arms shelf structure needs connected other framing members or power fluid casting die also must have two covers, needs two covers to surpass mast, turntable, power and hydraulic efficiency pressure system etc.So the configuration of car load is for the hoisting crane of other single cross section jibs, manufacturing cost has increased a lot, the disassembly process complexity of all parts, and also the synchro control difficulty of electric liquid is also very high.
To sum up, in Crane Industry, the difficulties of jib design is moment of inertia and the composite bending modulus that how to improve single arm support cross section at present, namely how to improve intensity, rigidity and the stability of single arm support when stressed, the final lifting performance that can improve whole hoisting crane, thus meet the more needs of the jib product of large-tonnage lifting weight.
Summary of the invention
The object of this invention is to provide a kind of crane arm support, this jib equate with existing jib perimeter of section or equiponderant situation under there is higher intensity, rigidity and stability.
To achieve these goals, the invention provides a kind of crane arm support, this jib is made up of chord member and web member, wherein, the number of described chord member is at least 5, and the cross-sectional plane of the described crane arm support that these at least 5 chord members surround is the axisymmetric polygon with at least 5 limits.
Preferably, the number of described chord member is 5,6,7,8,9 or 10.
Preferably, described chord member and web member are made up of round steel pipe, dihedral steel or rectangular steel pipe.
Preferably, described jib comprises the two ends arm joint of prismatic insert jib section and variable section.
Preferably, described insert jib section is more piece, and the length of different joints is different, and/or the thickness of the chord member of different joints is different, and/or the thickness of the web member of different joints is different.
Preferably, described insert jib section is more piece, and the length of different joints is identical, and/or the thickness of the chord member of different joints is identical, and/or the thickness of the web member of different joints is identical.
Preferably, the number of described chord member is 6, and the cross-sectional plane of described crane arm support is axisymmetric hexagon.
Preferably, if six summits of the hexagonal cross-section of described jib are followed successively by an A, B, C, D, E and F, wherein limit FA is parallel to limit CD, the axis of symmetry of described hexagonal cross-section is vertically divided limit FA and limit CD equally, distance between limit FA and limit CD is H, do the straight line that is parallel to FA and CD and all equates to the distance of FA and CD, this straight line is equal to the distance of some B and some E is all h
1/4≤h/H≤1/2。
Another object of the present invention is to provide a kind of hoisting crane, and this hoisting crane has above-mentioned jib of the present invention.
By technique scheme, the cross section of crane arm support is the polygonized structure that is greater than four limits, thereby in the situation that meeting jib dimensional restriction, improves intensity, rigidity and the stability of jib.By the optimal design of the structure to jib of the present invention, some situation can replace both arms shelf structure conventional in prior art by single arm support structure, has not only simplified the structure of hoisting crane, and has reduced cost.
Other features and advantages of the present invention are described in detail the detailed description of the invention part subsequently.
Brief description of the drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the cross sectional representation of the crane arm support of prior art;
Fig. 2 is the H type both arms frame schematic diagram of prior art;
Fig. 3 is the A type both arms frame schematic diagram of prior art;
Fig. 4 is crane arm support schematic diagram according to the preferred embodiment of the present invention;
Fig. 5 is the cross sectional representation of crane arm support according to the preferred embodiment of the present invention.
Description of reference numerals
1 chord member 2 web members
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, detailed description of the invention described herein only, for description and interpretation the present invention, is not limited to the present invention.
The invention provides a kind of crane arm support, this jib is made up of chord member 1 and web member 2, and wherein, the number of described chord member 1 is at least 5, and the cross-sectional plane of the described crane arm support that these at least 5 chord members 1 surround is the axisymmetric polygon with at least 5 limits.
As shown in Figure 4, for the truss-type cantilever crane of hoisting crane, on the one hand, due to the shape of jib own and the fixing not flexible of structure, therefore in the transportation of hoisting crane, the restriction that the size of jib is usually transported, on the other hand, there is enough intensity, rigidity and stability in order to ensure jib, conventionally need again the size by increasing jib to meet the more demand of large-tonnage lifting weight.
As shown in Figure 1 to Figure 3, the cross section of the jib that hoisting crane uses is at present all quadrangle conventionally, in order to improve moment of inertia and the composite bending modulus in single arm support cross section, technical scheme of the present invention provides a kind of jib of the polygonal cross-section with at least 5 limits, as shown in Figure 2.And this polygonal cross-section is zhou duicheng tuxing.Like this, just increase single arm support cross sectional moment of inertia and composite bending modulus, thereby in the situation that meeting jib dimensional restriction, improved intensity, rigidity and the stability of jib, finally improved complete machine lifting performance.By the optimal design of the structure to jib of the present invention, some situation can replace both arms shelf structure conventional in prior art by single arm support structure, has not only simplified the structure of hoisting crane, and has reduced cost.
Preferably, the number of described chord member 1 is 5,6,7,8,9 or 10.That is to say that jib cross-sectional plane is pentagon, hexagon, heptagon, octagon, nonagon or decagon, more preferably, conventionally can select hexagon, octagon or decagon.
Preferably, described chord member 1 and web member 2 are made up of round steel pipe, dihedral steel or rectangular steel pipe.Conventionally, the chord member 1 of jib of the present invention and web member 2 are made up of round steel pipe.But material and cross sectional shape that chord member 1 of the present invention and web member 2 adopt are not limited to this, also can utilize weight metal or non-metal etc. lighter, that intensity is higher to make.
Preferably, described jib comprises the two ends arm joint of prismatic insert jib section and variable section.In crane arm support of the present invention, jib comprises along its length the multiple arms joints that connect successively, and the cross section that wherein insert jib section is gone up along its length equates, two ends arm does not save the cross section of going up along its length not etc.
Preferably, described insert jib section is more piece, and the length of different joints is different, and/or the thickness of the chord member 1 of different joints is different, and/or the thickness of the web member 2 of different joints is different.
It should be noted that, the thickness of chord member 1 and web member 2 refers to the thickness of the material for manufacturing chord member 1 or web member 2, for the concrete meaning difference of this thickness indication of different materials, for example, for tubular chord member 1 and/or web member 2, the thickness of this thickness vial wall, for angle-steel, this thickness refers to the thickness of steel plate.
Wherein, insert jib section can be multiple, for each insert jib section, the chord member 1 of arm joint length and arm joint and the thickness of web member 2 all can exert an influence to the intensity of arm joint, therefore, for each insert jib section of different length, can take chord member 1 form different with the thickness of web member 2 of each arm joint, so not only can make the intensity of each insert jib section substantially equal, and the intensity of whole jib is as the criterion with the poorest arm of intensity joint, so not only keep each arm to save even intensity also can not causing the waste of material.
Preferably, described insert jib section is more piece, and the length of different joints is identical, and/or the thickness of the chord member 1 of different joints is identical, and/or the thickness of the web member 2 of different joints is identical.The present invention is not limited to above-mentioned embodiment, and the thickness of the length between each insert jib section, the thickness of chord member and/or web member also can equate.
It should be noted that, the present invention is not limited for the length of each insert jib section and two ends arm joint and the chord member of arm joint and the thickness of web member, in application, carries out suitably selecting with meet requirements according to actual conditions.
Preferably, the number of described chord member 1 is 6, and the cross-sectional plane of described crane arm support is axisymmetric hexagon.For the present invention, the polygonal limit number of arm joint cross-sectional plane can not unrestrictedly increase, and is preferably the hexagonal cross-section of 6 chord member compositions.
Preferably, if six summits of the hexagonal cross-section of described jib are followed successively by an A, B, C, D, E and F, wherein limit FA is parallel to limit CD, the axis of symmetry of described hexagonal cross-section is vertically divided limit FA and limit CD equally, distance between limit FA and limit CD is H, do the straight line that is parallel to FA and CD and all equates to the distance of FA and CD, this straight line is equal to the distance of some B and some E is all h
1/4≤h/H≤1/2。
More than exemplify the preferred sectional dimension while being hexagon for the cross-sectional plane of jib.As shown in Figure 5, the selection of above-mentioned size and calculating are that for jib, composite bending modulus and the moment of inertia in cross section are the bigger the better according to the formula that calculates cross section composite bending modulus and moment of inertia.
In addition, the present invention also provides a kind of hoisting crane, and wherein, this hoisting crane comprises the crane arm support that the present invention is above-mentioned.
By utilizing crane arm support of the present invention, just can meet under the prerequisite of the restriction of transport to size, greatly improve intensity, rigidity and the stability of jib, therefore hoisting crane of the present invention can only use a jib just can reach the requirement of lifting weight.Like this, hoisting crane can be a set of for the corresponding mast of elevator boom rack, turntable and hydraulic efficiency pressure system, thereby makes the assembling of parts and control greatly and simplify, and cost also can reduce greatly.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned detailed description of the invention, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (6)
1. a crane arm support, this jib is made up of chord member (1) and web member (2), it is characterized in that, the number of described chord member (1) is at least 5, the cross-sectional plane of the described crane arm support that these at least 5 chord members (1) surround is the axisymmetric polygon with at least 5 limits, the number of described chord member (1) is 6, the cross-sectional plane of described crane arm support is axisymmetric hexagon, if six summits of the hexagonal cross-section of described jib are followed successively by an A, B, C, D, E and F, wherein limit FA is parallel to limit CD, the axis of symmetry of described hexagonal cross-section is vertically divided limit FA and limit CD equally, distance between limit FA and limit CD is H, do the straight line that is parallel to FA and CD and all equates to the distance of FA and CD, this straight line equates to be all h to the distance of some B and some E,
fA/BE<1,1/4≤h/H≤1/2.
2. crane arm support according to claim 1, is characterized in that, described chord member (1) and web member (2) are made up of round steel pipe, dihedral steel or rectangular steel pipe.
3. crane arm support according to claim 1, is characterized in that, described jib comprises the two ends arm joint of prismatic insert jib section and variable section.
4. crane arm support according to claim 3, is characterized in that, described insert jib section is more piece, and the length of different joints is different, and/or the thickness of the chord member (1) of different joints is different, and/or the thickness of the web member (2) of different joints is different.
5. crane arm support according to claim 3, is characterized in that, described insert jib section is more piece, and the length of different joints is identical, and/or the thickness of the chord member (1) of different joints is identical, and/or the thickness of the web member (2) of different joints is identical.
6. a hoisting crane, is characterized in that, this hoisting crane comprises the crane arm support described in any one in the claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320095.1A CN102502426B (en) | 2011-10-20 | 2011-10-20 | Crane boom and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110320095.1A CN102502426B (en) | 2011-10-20 | 2011-10-20 | Crane boom and crane |
Publications (2)
| Publication Number | Publication Date |
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| CN102502426A CN102502426A (en) | 2012-06-20 |
| CN102502426B true CN102502426B (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110320095.1A Active CN102502426B (en) | 2011-10-20 | 2011-10-20 | Crane boom and crane |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013056441A1 (en) * | 2011-10-20 | 2013-04-25 | 中联重科股份有限公司 | Crane boom frame and crane |
| CN105625795B (en) * | 2016-03-23 | 2018-03-09 | 国家电网公司 | A kind of adjustable messenger unfolding arm support |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381003A (en) * | 2008-09-19 | 2009-03-11 | 航天东方红卫星有限公司 | Main load-carrying structure of spacecraft |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2255251B1 (en) * | 1973-12-20 | 1976-11-19 | Creusot Loire | |
| CN85100910A (en) * | 1985-04-01 | 1986-08-13 | 邢台市桥东区个体经营起重机设计研究所 | Multi boom umbrella type crane |
| FR2744786B1 (en) * | 1996-02-09 | 1998-03-27 | Tecnoma | JOINT ASSEMBLY COMPRISING DIRECT CONNECTIONS BETWEEN BEAMS |
| WO2005028781A2 (en) * | 2003-09-16 | 2005-03-31 | Clement Hiel | Composite tower for a wind turbine and method of assembly |
| JP2010254398A (en) * | 2009-04-22 | 2010-11-11 | Kobe Steel Ltd | Lattice boom of crane |
| CN102030274A (en) * | 2010-05-24 | 2011-04-27 | 韶关市起重机厂有限责任公司 | Jib arm structure of lorry-mounted crane |
| CN101880012A (en) * | 2010-07-21 | 2010-11-10 | 上海三一科技有限公司 | Transition structure for crane jib |
| CN201952137U (en) * | 2011-01-18 | 2011-08-31 | 上海三一科技有限公司 | Combined transition arm support |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381003A (en) * | 2008-09-19 | 2009-03-11 | 航天东方红卫星有限公司 | Main load-carrying structure of spacecraft |
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| Title |
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| JP特开2010-254398A 2010.11.11 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20120620 Assignee: Hunan ZOOMLION Crawler Crane Co., Ltd. Assignor: Zoomlion Heavy Industry Science & Technology Development Co., Ltd. Contract record no.: 2016430000015 Denomination of invention: Crane boom and crane Granted publication date: 20140723 License type: Exclusive License Record date: 20160722 |
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