CN204454355U - The trapezoidal arm of flat-top tower crane - Google Patents
The trapezoidal arm of flat-top tower crane Download PDFInfo
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- CN204454355U CN204454355U CN201520115632.2U CN201520115632U CN204454355U CN 204454355 U CN204454355 U CN 204454355U CN 201520115632 U CN201520115632 U CN 201520115632U CN 204454355 U CN204454355 U CN 204454355U
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- lower edge
- arm
- tower crane
- web member
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Abstract
The utility model discloses a kind of trapezoidal arm of a kind of flat-top tower crane being applicable to large-tonnage flat-head tower crane and using, by winding up, web member and lower edge form, arm has the two of symmetry and winds up, lower edge is single box beam structure, two are winded up and to be connected with lower edge by multiple web member, and arm cross section is trapezium structure wide at the top and narrow at the bottom.When large-scale tower crane hoisting moment is larger, can winds up by two and share pulling force, thus improvement is winded up stressed; Lower edge adopts box single-rail structure, and this version efficiently reduces size and the weight of amplitude variation trolley, and reduce arm deadweight, improve the impact of amplitude variation trolley on lower edge plane deformation amount, carriage walking is more steady and safe and reliable; Two are winded up and to be connected with lower edge by angular plane surface web member, and overall in trapezium structure, make side web member stressed rationally clear and definite, lateral rigidity and torsional stiffness all improve a lot.
Description
(1) technical field
The utility model relates to the arm jib structure of flat-top tower crane.
(2) background technology
At present, along with national large nuclear-power, constantly the carrying out of thermal power project, also more and more higher to the performance requriements of large-scale tower crane.On market, existing tower type crane boom cross section mostly is equilateral triangle or rectangle, there is amplitude variation trolley size and weight excessive, the problem larger on the impact of jib lower edge plane deformation, and jib winds up as single pole structure mainly bears pulling force, when hoisting moment is excessive and between upper lower edge, depth of section is too low, the single Yin Lali of winding up cannot decompose and be difficult to bear huge pulling force.
(3) summary of the invention
The purpose of this utility model is to provide the trapezoidal arm of a kind of flat-top tower crane, adopts trapezium structure form, and can well solve singly winds up bears the problem that relay is excessive and amplitude variation trolley is larger on the impact of jib lower edge plane deformation.
The technical solution adopted in the utility model is: the trapezoidal arm of flat-top tower crane by winding up, web member and lower edge form, it is characterized in that: arm has the two of symmetry and winds up, lower edge is single box beam structure, two are winded up and to be connected with lower edge by multiple web member, and arm cross section is trapezium structure wide at the top and narrow at the bottom.
Equilateral triangle, square-section form arm Problems existing is adopted for current Large Towers machine, the utility model designs a kind of trapezoid cross section form arm, when large-scale tower crane hoisting moment is larger, can winds up by two and share pulling force, thus improvement is winded up stressed; Lower edge adopts box single-rail structure, and this version efficiently reduces size and the weight of amplitude variation trolley, and reduce arm deadweight, improve the impact of amplitude variation trolley on lower edge plane deformation amount, carriage walking is more steady and safe and reliable; Two are winded up and to be connected with lower edge by angular plane surface web member, and overall in trapezium structure, make side web member stressed rationally clear and definite, lateral rigidity and torsional stiffness all improve a lot.
The utility model has the following advantages compared to existing technology:
1) trapezoid cross section form arm, can reduce oad and the weight of amplitude variation trolley greatly, improve lifting performance;
2) trapezoid cross section form arm, employing of winding up " three plate holder two plates " high-strength pin connects, and lower edge employing box single-rail version, connects location by locating dowel pin, conveniently install, dismantles;
3) trapezoidal arm is made up of some joint jibs, only needs to change associated arm joint and install to strain the conversion that namely arm cover can realize different jib pattern length mutually, the restriction that the continuous replacing that can overcome using area is well combined the brachium of tower machine.
(4) accompanying drawing explanation
Fig. 1 is arm cross section structure schematic diagram of the present utility model;
Fig. 2 is the arm schematic cross-section with becoming spoke dolly;
Fig. 3 is jib block construction schematic diagram of the present utility model;
Fig. 4 is that two joint jib unit are connected schematic diagram;
Fig. 5 is that arm winds up employing three plate holder two plate articulated structure schematic diagram.
(5) detailed description of the invention
the trapezoidal arm of flat-top tower crane has the two of symmetry and winds up 1, lower edge 3 is single box-shaped track girder, two are winded up and 1 to be connected with lower edge 3 by multiple angular plane surface web member 2, and two are winded up between 1 and also have multiple web member to connect, and arm cross section is trapezium structure wide at the top and narrow at the bottom.Arm is connected to form by the jib unit of more piece same structure, and adjacent two winding up between 1 of joint jib unit adopt clamping plate type hinged, and hinged clamp region is three plate holder two plate forms.The box-shaped track girder upper cover plate of arm lower edge 3 is connected with both sides web member 2, and on lower cover, plane is amplitude variation trolley walking track 4.Amplitude variation trolley 5 is hung on track 4.Wind up 1 two plate sides 6 of three plate holder two plate articulated structures corresponding with two notches of another jib unit three plate side 7, after the notch of three plate sides 7 is inserted in this two plates side 6, the two open-work aligns mutually, penetrates hinged by high-strength pin 8.Arm of the present utility model is without the need to pull bar and cross section is trapezium structure, lower edge is box single-rail form, dolly crossbeam size is diminished, compared with the structure being two rod members with equilateral triangle lower edge, the impact of dolly on lower edge can be reduced, reduce the deflection of lower edge plane, ensure carriage walking safety, and lateral stability and torsional stiffness all improve a lot.Thus make the tower machine field of application of this arm section form more extensive.
Claims (3)
1. the trapezoidal arm of flat-top tower crane, be made up of wind up (1), web member (2) and lower edge (3), it is characterized in that: arm has the two of symmetry and winds up (1), lower edge (3) is single box beam structure, two wind up (1) are connected with lower edge (3) by multiple web member (2), and arm cross section is trapezium structure wide at the top and narrow at the bottom.
2. the trapezoidal arm of flat-top tower crane according to claim 1, it is characterized in that: arm is connected to form by the jib unit of more piece same structure, adjacent two winding up between (1) of joint jib unit adopt clamping plate type hinged, and hinged clamp region is three plate holder two plate forms.
3. the trapezoidal arm of flat-top tower crane according to claim 1, is characterized in that: the box girder upper cover plate of said arm lower edge (3) is connected with both sides web member (2), and on lower cover, plane is amplitude variation trolley walking track (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520115632.2U CN204454355U (en) | 2015-02-26 | 2015-02-26 | The trapezoidal arm of flat-top tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520115632.2U CN204454355U (en) | 2015-02-26 | 2015-02-26 | The trapezoidal arm of flat-top tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204454355U true CN204454355U (en) | 2015-07-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520115632.2U Active CN204454355U (en) | 2015-02-26 | 2015-02-26 | The trapezoidal arm of flat-top tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204454355U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892365A (en) * | 2017-04-20 | 2017-06-27 | 沈阳建筑大学 | A kind of parallel flat-top tower crane of both arms |
| CN113582049A (en) * | 2021-07-19 | 2021-11-02 | 徐工集团工程机械股份有限公司建设机械分公司 | Crawler crane and triangular truss arm thereof |
-
2015
- 2015-02-26 CN CN201520115632.2U patent/CN204454355U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106892365A (en) * | 2017-04-20 | 2017-06-27 | 沈阳建筑大学 | A kind of parallel flat-top tower crane of both arms |
| CN113582049A (en) * | 2021-07-19 | 2021-11-02 | 徐工集团工程机械股份有限公司建设机械分公司 | Crawler crane and triangular truss arm thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |