CN206569941U - A kind of prestressing force crane arm tower crane - Google Patents
A kind of prestressing force crane arm tower crane Download PDFInfo
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- CN206569941U CN206569941U CN201720303848.0U CN201720303848U CN206569941U CN 206569941 U CN206569941 U CN 206569941U CN 201720303848 U CN201720303848 U CN 201720303848U CN 206569941 U CN206569941 U CN 206569941U
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- tower crane
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Abstract
The utility model discloses a kind of prestressing force crane arm tower crane, it is characterized in that：Including flat-top tower crane (9), balance arm brace (2), support arm (3), crane arm short rod (4), crane arm long draw (5), the crane arm short rod (4), crane arm long draw (5) is one, the lower end of the support arm (3) at the top of the flat-top tower crane (9) with being hinged, one end and the upper end of the support arm (3) of the balance arm brace (2) are hinged, its other end is hinged with the otic placode on the arm end of the counter-jib (10) of the flat-top tower crane (9), one end and the upper end of the support arm (3) of the crane arm short rod (4) are hinged, otic placode on the arm root of crane arm (7) of its other end with being located at the flat-top tower crane (9) is hinged, the upper end of support arm (3) is hinged described in one end of the crane arm long draw (5), otic placode on the arm end of crane arm (7) of its other end with being located at the flat-top tower crane (9) is hinged.
Description
Technical field
The utility model is related to a kind of prestressing force crane arm tower crane, belongs to tower crane technical field.
Background technology
Derrick crane is essential key equipment in modern construction, as country is increased in communications and transportation, water conservancy
The quick input of the engineerings such as hydroelectric project, high ferro, electric power and assembled architecture, the demand of tower crane is also increasing, it is desirable to have
There is the situation of the tower crane of features more and more, especially need significantly locating the lifting capacity of lifting increasingly in engineering
Greatly.
The structure of flat-top tower crane crane arm belongs to static determinacy cantilever design, and its cantilever design can realize that arm support is dismounted in the air,
Arm support dismounts the requirement compared with integral hoisting to crane gear and substantially reduced in the air, saves dismounting expense, but compared with same performance
The crane arm steel using amount of tower crane is larger, and the moment of flexure for causing crane arm downward is larger, largely reducing the elevating capacity of flat-top tower crane.
Utility model content
For the above-mentioned problems in the prior art, the utility model both has the advantages that flat-top tower crane there is provided a kind of
Mechanical property, the prestressing force crane arm tower of the elevating capacity of raising flat-top tower crane crane arm of flat-top tower crane crane arm can be improved again
Machine.
The utility model is achieved by the following technical solution：A kind of prestressing force crane arm tower crane, it is characterized in that：Bag
Include flat-top tower crane, balance arm brace, support arm, crane arm short rod, crane arm long draw, the crane arm short rod, lifting
Brachium pull bar is one, and the lower end of the support arm at the top of the flat-top tower crane with being hinged, and the one of the balance arm brace
The upper end with the support arm is held to be hinged, its other end is hinged with the otic placode on the arm end of the counter-jib of the flat-top tower crane, institute
The one end and the upper end of the support arm for stating crane arm short rod are hinged, its other end and the crane arm for being located at the flat-top tower crane
Arm root on otic placode be hinged, the upper end of support arm is hinged described in one end of the crane arm long draw, and its other end is with being located at
Otic placode on the arm end of the crane arm of the flat-top tower crane is hinged.
Further, in revolution of the tie point away from flat-top tower crane of the crane arm of the crane arm short rod and flat-top tower crane
The distance of the heart is 22500-24500mm；The tie point of the crane arm of the crane arm long draw and flat-top tower crane is away from flat-top tower crane
The centre of gyration distance be 53500-55500mm.The hoisting point position of short rod and long draw is optimal within this range, can make drawing
The pulling force that bar is subject to is maximum, and the hoisting moment that crane arm is obtained is maximum, significantly improves the lifting capacity of crane arm, meanwhile, subtract
The small amplitude of stress suffered by crane arm, is more uniformly stressed crane arm, improves the security performance of tower crane.
The utility model will balance arm brace, support arm, crane arm short rod and crane arm long draw and be arranged on flat-head tower
On machine, by setting rational balance weight, crane arm short rod and the length and hoisting point position of crane arm long draw, counter-jib
On counterweight produce torque be delivered to by balancing arm brace and support arm on crane arm short rod and long draw, make crane arm
Short rod and crane arm long draw obtain rational pretension, so that crane arm obtains a power opposite with raising thing gravity,
Crane arm stress can be reduced, the elevating capacity of crane arm is improved.The utility model not only has the original arm support of flat-top tower crane
Can be dismounted in the air, the low advantage of dismounting expense, and its elevating capacity improves a lot, and substantially increases the property of tower crane
Can, while the tower crane of this duplex pull rod prestressing force crane arm further improves the mechanical characteristic of single suspension centre prestressing force crane arm,
Make crane arm stress distribution more uniform, more save material.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the A portions enlarged diagram in Fig. 1；
In figure, 1, the otic placode at counter-jib arm end, 2, balance arm brace, 3, support arm, 4, crane arm short rod, 5, crane arm
Long draw, 6, the otic placode at cargo boom end, 7, crane arm, 8, the otic placode of cargo boom root, 9, flat-top tower crane, 10, counter-jib,
11st, counterweight.
Embodiment
The utility model is further described below by embodiment and with reference to accompanying drawing：
As shown in drawings, a kind of prestressing force crane arm tower crane, it include flat-top tower crane 9, balance arm brace 2, support arm 3,
Crane arm short rod 4, crane arm long draw 5.Wherein, flat-top tower crane 9 is prior art, and it mainly includes counter-jib 10, lifting
Arm 7, counterweight 11, slewing tower.In the utility model, the crane arm short rod 4, crane arm long draw 5 are one.Flat
The arm end of the counter-jib 10 of head tower crane 9 is provided with otic placode 1, and otic placode 6, crane arm 7 are provided with the arm end of the crane arm 7 of flat-top tower crane 9
Arm root be provided with otic placode 8.The lower end of the support arm 3 and the top of the flat-top tower crane 9 are hinged.The balance arm brace 2
One end and the upper end of the support arm 3 are hinged, its other end and the otic placode 1 on the arm end of the counter-jib 10 of the flat-top tower crane 9
It is hinged.One end of the crane arm short rod 4 and the upper end of the support arm 3 are hinged, and its other end is with being located at the flat-head tower
Otic placode 8 on the arm root of the crane arm 7 of machine 9 is hinged.The upper end of support arm 3 is hinged described in one end of the crane arm long draw 5,
The otic placode 6 at the arm end of crane arm 7 of its other end with being located at the flat-top tower crane 9 is hinged.Shown in the setting of each otic placode and Fig. 2
Otic placode set it is identical.
In the utility model, the torque that the counterweight 11 on counter-jib 10 is produced is transmitted by balancing arm brace 2 and support arm 3
Onto crane arm short rod 4 and crane arm long draw 5, crane arm short rod 4 and crane arm long draw 5 is set to obtain rational prestretching
Power, so that crane arm 7 obtains a power opposite with raising thing gravity, it is possible to reduce the stress of crane arm 7, improves crane arm
7 elevating capacity.
Preferably, revolution of the tie point away from flat-top tower crane of the crane arm short rod 4 and the crane arm 7 of flat-top tower crane
The distance at center is 22500-24500mm；The tie point anomaly head of the crane arm long draw 5 and the crane arm 7 of flat-top tower crane
The distance of the centre of gyration of tower crane is 53500-55500mm.
Other parts in the present embodiment are prior art, be will not be repeated here.
Claims (2)
1. a kind of prestressing force crane arm tower crane, it is characterized in that：Including flat-top tower crane (9), balance arm brace (2), support arm (3),
Crane arm short rod (4), crane arm long draw (5), the crane arm short rod (4), crane arm long draw (5) they are one,
The lower end of the support arm (3) with being hinged at the top of the flat-top tower crane (9), it is described balance arm brace (2) one end with it is described
The upper end of support arm (3) is hinged, and its other end is hinged with the otic placode on the arm end of the counter-jib (10) of the flat-top tower crane (9),
One end and the upper end of the support arm (3) of the crane arm short rod (4) are hinged, and its other end is with being located at the flat-top tower crane
(9) otic placode on the arm root of crane arm (7) is hinged, the upper end of support arm (3) described in one end of the crane arm long draw (5)
It is hinged, the otic placode on the arm end of crane arm (7) of its other end with being located at the flat-top tower crane (9) is hinged.
2. prestressing force crane arm tower crane according to claim 1, it is characterized in that：The crane arm short rod (4) and tack
The distance of the centre of gyration of the tie point away from flat-top tower crane of the crane arm (7) of tower crane is 22500-24500mm；The lifting brachium
The distance of pull bar (5) and the centre of gyration of the tie point away from flat-top tower crane of the crane arm (7) of flat-top tower crane is 53500-
55500mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720303848.0U CN206569941U (en) | 2017-03-27 | 2017-03-27 | A kind of prestressing force crane arm tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720303848.0U CN206569941U (en) | 2017-03-27 | 2017-03-27 | A kind of prestressing force crane arm tower crane |
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| Publication Number | Publication Date |
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| CN206569941U true CN206569941U (en) | 2017-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720303848.0U Active CN206569941U (en) | 2017-03-27 | 2017-03-27 | A kind of prestressing force crane arm tower crane |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910729A (en) * | 2018-09-29 | 2018-11-30 | 山东以琳智能科技有限公司 | A kind of device and method improving prestressing force crane arm tower crane stress |
-
2017
- 2017-03-27 CN CN201720303848.0U patent/CN206569941U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108910729A (en) * | 2018-09-29 | 2018-11-30 | 山东以琳智能科技有限公司 | A kind of device and method improving prestressing force crane arm tower crane stress |
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