CN202924635U - Tower crane jib and tower crane comprising same - Google Patents
Tower crane jib and tower crane comprising same Download PDFInfo
- Publication number
- CN202924635U CN202924635U CN 201220604566 CN201220604566U CN202924635U CN 202924635 U CN202924635 U CN 202924635U CN 201220604566 CN201220604566 CN 201220604566 CN 201220604566 U CN201220604566 U CN 201220604566U CN 202924635 U CN202924635 U CN 202924635U
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- arm
- roots
- pull bar
- runway girder
- derrick runway
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Abstract
The utility model provides a tower crane jib and a tower crane comprising the same. The tower crane jib comprises a jib root part (331) and a jib tip part (332), wherein the section of the jib root part (331) is quadrilateral; the section of the jib tip part (332) is triangular; a lower boom (3312) of the jib root part (331) is rotatably connected with a lower boom (3322) of the jib tip part (332); and an upper boom (3311) of the jib root part is disconnected from an upper boom (3321) of the jib tip part. According to the tower crane jib and the tower crane comprising the same, the side-direction bearing capacity of the tower crane jib can be remarkably enhanced and the maximum working range of the tower crane jib can be greatly increased.
Description
Technical field
The utility model relates to building engineering elevator machinery field, in particular to a kind of derrick runway girder and comprise the tower crane of this derrick runway girder.
Background technology
The crane arm of tower crane, when the perpendicular direction jib of wind, should bear wind and carry the moment of flexure that produces in horizontal surface, bear again the moment of flexure of producing due to revolution (in accelerator) force of inertia, if wind load approximate be used as linear, suppose that namely the wind load on unit length is q, the jib linear mass is m, jib length is l, the angle of revolution acceleration/accel is ε, and the moment of flexure that produces of wind load and inertia loading can be with following formula approximate calculation (ignoring arm root hinge to the center of gyration distance):
Can find out from top formula, the moment of flexure that wind load and inertia loading produce is directly proportional to the jib length square substantially, and jib is longer, requires jib that larger side direction load-carrying capacity is arranged.
Have tower crane now and consider from integral layout, generally adopt simple triangular-section, derrick runway girder length is that the effective work range of tower crane is limited, and therefore present domestic crane arm extreme length can only reach 80 meters.
Abroad in tower crane manufacturer, in order to obtain larger effective work range, take to increase the mode of hoisting arm structure sectional dimension to strengthen the side direction load-carrying capacity, but the long tower machine of the galianconism identical with hoisting moment is compared, its topside size is bigger than normal, cost is higher, and processing and transportation difficulty, and therefore at present external derrick runway girder extreme length can only reach 100 meters.
The utility model content
The utility model aims to provide a kind of derrick runway girder and comprises the tower crane of this derrick runway girder, can significantly strengthen the side direction load-carrying capacity of derrick runway girder, significantly increases the maximum effectively work range of derrick runway girder.
To achieve these goals, according to an aspect of the present utility model, a kind of derrick runway girder is provided, comprise arm roots and arm tip, the cross section of arm roots is quadrangle, the cross section of arm tip is triangle, wherein is rotatably connected between the arm tip lower boom of the arm roots lower boom of arm roots and arm tip, disconnects between arm roots top boom and arm tip top boom.
Further, derrick runway girder comprises the first suspension centre of being arranged on arm roots, be positioned at the arm tip first end the second suspension centre and be positioned at the 3rd suspension centre of the second end of arm tip, the first end of arm tip is an end that is connected with arm roots, the first suspension centre, the second suspension centre and the 3rd suspension centre respectively be arranged on derrick runway girder on pull bar be connected.
Further, the first suspension centre is two, and two the first suspension centre correspondences are arranged on two top booms of arm roots.
Further, the connection location of arm roots and arm tip is provided with pull bar support mount pad.
Further, arm roots is provided with interim installation pull bar away from an end of arm tip.
Further, the interim first end that pull bar is installed is connected on the arm roots top boom, the extension elongation of the arm roots top boom that is connected with interim installation pull bar is less than the extension elongation of arm roots lower boom, and the second end that pull bar is installed temporarily is connected on the swing type mechanism of tower machine.
Further, install between pull bar and arm roots top boom as bearing pin is connected, the bearing pin mounting hole of temporarily installing on pull bar and/or arm roots top boom is waist shaped hole temporarily.
Further, the cross section of arm roots is rectangle.
According on the other hand of the present utility model, a kind of tower crane is provided, this derrick runway girder is above-mentioned derrick runway girder.
Use the technical solution of the utility model, derrick runway girder comprises arm roots and arm tip, the cross section of arm roots is quadrangle, the cross section of arm tip is triangle, wherein be rotatably connected between the arm tip lower boom of the arm roots lower boom of arm roots and arm tip, disconnect between arm roots top boom and arm tip top boom.Be that quadrangle, arm tip is leg-of-mutton variable section elevator boom rack by adopting arm roots, can effectively strengthen by tetragonal arm roots the side direction load-carrying capacity of elevator boom rack, reduce the whole structure of whole hoisting crane, increase the maximum effectively work range of elevator boom rack, thereby increase the maximum lifting performance of weight-lifting equipment.And be rotatably connected between the arm tip lower boom with the arm roots lower boom of arm roots and arm tip, disconnect between arm roots top boom and arm tip top boom, can overcome well the problem on deformation of bringing again when elevator boom rack is long, improve the working stability of elevator boom rack.
Description of drawings
The accompanying drawing that consists of a part of the present utility model is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation according to the derrick runway girder of the tower crane of embodiment of the present utility model;
Fig. 2 shows the structure for amplifying schematic diagram according to the derrick runway girder B place of the embodiment of Fig. 1;
Fig. 3 shows the structure for amplifying schematic diagram according to the derrick runway girder D place of the embodiment of Fig. 1;
Fig. 4 shows the left TV structure schematic diagram according to the arm roots of the derrick runway girder of the embodiment of Fig. 1;
Fig. 5 shows the cross section structure schematic diagram according to the arm tip of the derrick runway girder of the embodiment of Fig. 1; And
Fig. 6 shows the structural representation according to the tower crane of the embodiment of Fig. 1.
The specific embodiment
Hereinafter also describe in conjunction with the embodiments the utility model in detail with reference to accompanying drawing.Need to prove, in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
As Fig. 1, Fig. 4 and shown in Figure 5, according to embodiment of the present utility model, a kind of derrick runway girder is provided, comprise arm roots 331 and arm tip 332, the cross section of arm roots 331 is quadrangle, the cross section of arm tip 332 is triangle, wherein is rotatably connected between the arm tip lower boom 3322 of the arm roots lower boom 3312 of arm roots 331 and arm tip 332, disconnects between arm roots top boom 3311 and arm tip top boom 3321.Preferably, be connected for bearing pin between arm roots lower boom 3312 and arm tip lower boom 3322.
Be that quadrangle, arm tip 332 is leg-of-mutton variable section elevator boom rack by adopting arm roots 331, can effectively strengthen the side direction load-carrying capacity of elevator boom rack by tetragonal arm roots 331, reduce the whole structure of whole hoisting crane, increase the maximum effectively work range of elevator boom rack, thereby increase the maximum lifting performance of weight-lifting equipment.And be rotatably connected between the arm tip lower boom 3322 with the arm roots lower boom 3312 of arm roots 331 and arm tip 332, disconnect between arm roots top boom 3311 and arm tip top boom 3321, can overcome well the problem on deformation of bringing again when elevator boom rack is long, improve the working stability of elevator boom rack.
Derrick runway girder comprises the first suspension centre 36a of being arranged on arm roots 331, be positioned at arm tip 332 first end the second suspension centre 36b and be positioned at the 3rd suspension centre 36c of the second end of arm tip 332, the first end of arm tip 332 is ends that are connected with arm roots 331.Derrick runway girder is by being connected between the luffing mechanism that is connected to pull bar and tower crane on the first suspension centre 36a, the second suspension centre 36b and the 3rd suspension centre 36c, and by pull bar, derrick runway girder is formed supporting role, effectively strengthen the weight load-carrying capacity of derrick runway girder.In the ordinary course of things, arm roots 331 is shorter than the length of arm tip 332 comparatively speaking, therefore, only be provided with the first suspension centre 36a in the position of the close arm tip 332 of arm roots 331 herein, and simultaneously 332 first end and the second end are provided with respectively the second suspension centre 36b and the 3rd suspension centre 36c in the arm tip, this kind arranges structure and makes the force structure of derrick runway girder more reasonable, can bear larger load.
Preferably, because arm roots 331 is quadrangular section, its arm roots top boom 3311 has two, thereby, the first suspension centre 36a is two, two the first suspension centre 36a are arranged on the same extension position of the arm roots top boom 3311 of arm roots 331, and correspondence is arranged on two arm roots top booms 3311 respectively.So, made corresponding adjustment according to the changes of section of arm roots 331, made the stressed more balanced of derrick runway girder, stressed unbalance problem can not occur.Certainly, two the first suspension centre 36a are also the different length positions that can be separately positioned on two arm roots top booms 3311.
Connection location in arm roots 331 and arm tip 332 can also arrange pull bar support mount pad 40, pull bar support mount pad 40 can be used for installing pull bar support 41, pull bar support 41 is supported on the middle part of the second pull bar, and the middle part of the second pull bar is upwards propped up, thereby increase the angle of pull bar and horizontal surface, improve the component of pull bar on gravity direction, improve the load-carrying ability of derrick runway girder.
The number of suspension centre also can be set to more, when the length of derrick runway girder hour, also can be only a suspension centre be set, concrete set-up mode depending on actual conditions on arm tip 332.
In conjunction with shown in Figure 3, connection location in arm roots 331 and arm tip 332 can also arrange pull bar support mount pad 40, pull bar support mount pad 40 can be used for installing pull bar support 41, be used for pull bar is formed midship mounting, thereby increase the angle of pull bar and horizontal surface, improve the component of pull bar on gravity direction, improve the load-carrying ability of derrick runway girder.Pull bar support mount pad 40 can be for being connected to the turning cylinder between two arm roots lower booms 3312 or two arm tip lower booms 3322, and pull bar support 41 is arranged on this turning cylinder rotationally.Be provided with position limiting structure on this turning cylinder, be used for limiting the axial location of pull bar support 41 on turning cylinder, prevent that pull bar support 41 from sliding, and affects the stability of connection structure in the process of work.Pull bar support mount pad 40 also can be for being separately positioned on the rotating shaft mount pad on two arm roots lower booms 3312 or two arm tip lower booms 3322, and pull bar support 41 is arranged in two rotating shaft mount pads rotationally by rotating shaft.
In conjunction with shown in Figure 2, be provided with interim installation pull bar 44 at arm roots 331 away from an end of arm tip 332.The interim first end that pull bar 44 is installed is connected on arm roots top boom 3311, and the extension elongation of the arm roots top boom 3311 that is connected with interim installation pull bar 44 is less than the extension elongation of arm roots lower boom 3312.The interim installation between pull bar 44 and arm roots top boom 3311 as bearing pin is connected, the bearing pin mounting hole of temporarily installing on pull bar 44 and/or arm roots top boom 3311 is waist shaped hole.Interim installation pull bar 44 is mainly used in the installation of derrick runway girder is played the effect of supplemental support.
When the length of elevator boom rack more in short-term, also can consider to remove and be positioned at the pull bar that outermost is connected with the 3rd suspension centre 36c, and the second suspension centre 36b is moved outward, so that the stress equalization of elevator boom rack.
in the process that derrick runway girder is installed, the arm joint of elevator boom rack is installed section by section, therefore when beginning most the arm joint of elevator boom rack arm roots 331 is installed, because the arm section of elevator boom rack does not arrange pull bar, therefore can't form supporting role to the arm joint, only when the arm joint of elevator boom rack is installed to the position of the first suspension centre 36a, just can be by the arm joint formation supporting role of pull bar to elevator boom rack arm roots 331, before this, the arm joint of elevator boom rack is owing to lacking support, install very inconvenient, need to increase the installation that auxiliary supporting construction just can be completed the first suspension centre 36a each arm joint before.The appearance that pull bar 44 is installed has temporarily solved this problem well.In the time need to installing each arm joint before the first suspension centre 36a, only need by the interim pull bar 44 of installing, the top boom of arm joint to be captiveed joint with other structure of tower crane, just can play the effect of hold-down arm joint, therefore be convenient to the installation of follow-up arm joint.After the arm joint at the first suspension centre 36a place is installed, arm roots 331 is realized being connected by between pull bar and luffing mechanism, just can bear the application force of arm roots 331 this moment by being arranged on pull bar on arm roots 331 and arm tip 332,44, pull bar is installed is not temporarily stressed.When the arm joint of unloading elevator boom rack, also can realize the unloading of the arm joint of arm roots 331 by interim installation pull bar 44, more convenient to operate.Waist shaped hole can be arranged on interim installation pull bar 44 or on arm roots top boom 3311, perhaps both all arrange this waist shaped hole, waist shaped hole makes interim installation pull bar 44 can regulate tension degree to the arm of arm roots 331 joint, thereby adjust arm joint angle with respect to the horizontal plane, by regulating the tension degree of interim installation pull bar 44, can obtain the arm joint installation site that needs.
The cross section of arm roots 331 is rectangle or trapezoidal.
In conjunction with shown in Figure 6, according to embodiment of the present utility model, also provide a kind of tower crane, comprise derrick runway girder, this derrick runway girder is above-mentioned derrick runway girder.In the present embodiment, the first pull bar 42 on derrick runway girder and the first end of the second pull bar 43 all are connected on the tower top support 32 of tower crane, the first end of the 3rd pull bar 45 on derrick runway girder is connected on pull bar support 41, the second end of the first pull bar 42 on derrick runway girder is connected on the first suspension centre 36a of derrick runway girder, the second end of the second pull bar 43 is connected on the second suspension centre 36b of derrick runway girder, and the second end of the 3rd pull bar 45 is connected on the 3rd suspension centre 36c of derrick runway girder.
From above description, can find out, the utility model the above embodiments have realized following technique effect: derrick runway girder comprises arm roots and arm tip, the cross section of arm roots is quadrangle, the cross section of arm tip is triangle, wherein be rotatably connected between the arm tip lower boom of the arm roots lower boom of arm roots and arm tip, disconnect between arm roots top boom and arm tip top boom.Be that quadrangle, arm tip is leg-of-mutton variable section elevator boom rack by adopting arm roots, can effectively strengthen by tetragonal arm roots the side direction load-carrying capacity of elevator boom rack, reduce the whole structure of whole hoisting crane, increase the maximum effectively work range of elevator boom rack, thereby increase the maximum lifting performance of weight-lifting equipment.And be rotatably connected between the arm tip lower boom with the arm roots lower boom of arm roots and arm tip, disconnect between arm roots top boom and arm tip top boom, can overcome well the problem on deformation of bringing again when elevator boom rack is long, improve the working stability of elevator boom rack.
The above is only preferred embodiment of the present utility model, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (9)
1. derrick runway girder, comprise arm roots (331) and arm tip (332), it is characterized in that, the cross section of described arm roots (331) is quadrangle, the cross section of described arm tip (332) is triangle, be rotatably connected between the arm roots lower boom (3312) of wherein said arm roots (331) and the arm tip lower boom (3322) of described arm tip (332), disconnect between described arm roots top boom (3311) and described arm tip top boom (3321).
2. derrick runway girder according to claim 1, it is characterized in that, described derrick runway girder comprises the first suspension centre (36a) that is arranged on described arm roots (331), be positioned at described arm tip (332) first end the second suspension centre (36b) and be positioned at the 3rd suspension centre (36c) of the second end of described arm tip (332), the first end of described arm tip (332) is an end that is connected with described arm roots (331), described the first suspension centre (36a), described the second suspension centre (36b) and described the 3rd suspension centre (36c) respectively be arranged on described derrick runway girder on pull bar be connected.
3. derrick runway girder according to claim 2, is characterized in that, described the first suspension centre (36a) is two, and two described the first suspension centres (36a) correspondence is arranged on two top booms (3311) of described arm roots.
4. derrick runway girder according to claim 1, is characterized in that, described arm roots (331) is provided with pull bar support mount pad (40) with the connection location of described arm tip (332).
5. derrick runway girder according to claim 1, is characterized in that, described arm roots (331) is provided with interim installation pull bar (44) away from an end of described arm tip (332).
6. derrick runway girder according to claim 5, it is characterized in that, the first end of described interim installation pull bar (44) is connected on described arm roots top boom (3311), the extension elongation of the described arm roots top boom (3311) that is connected with described interim installation pull bar (44) is less than the extension elongation of described arm roots lower boom (3312), and the second end of described interim installation pull bar (44) is connected on the swing type mechanism of tower machine.
7. derrick runway girder according to claim 6, it is characterized in that, between described interim installation pull bar (44) and described arm roots top boom (3311), for bearing pin is connected, the bearing pin mounting hole on described interim installation pull bar (44) and/or described arm roots top boom (3311) is waist shaped hole.
8. the described derrick runway girder of any one according to claim 1 to 7, is characterized in that, the cross section of described arm roots (331) is rectangle.
9. a tower crane, comprise derrick runway girder, it is characterized in that, described derrick runway girder is the described derrick runway girder of any one in claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220604566 CN202924635U (en) | 2012-11-15 | 2012-11-15 | Tower crane jib and tower crane comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220604566 CN202924635U (en) | 2012-11-15 | 2012-11-15 | Tower crane jib and tower crane comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202924635U true CN202924635U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220604566 Expired - Lifetime CN202924635U (en) | 2012-11-15 | 2012-11-15 | Tower crane jib and tower crane comprising same |
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| Country | Link |
|---|---|
| CN (1) | CN202924635U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020134714A1 (en) | 2020-12-22 | 2022-06-23 | Tadano Demag Gmbh | Mobile crane with a luffing main boom and with an additional boom system |
| US11945700B2 (en) | 2020-11-09 | 2024-04-02 | Tadano Demag Gmbh | Vehicle crane comprising a jib system |
-
2012
- 2012-11-15 CN CN 201220604566 patent/CN202924635U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11945700B2 (en) | 2020-11-09 | 2024-04-02 | Tadano Demag Gmbh | Vehicle crane comprising a jib system |
| DE102020134714A1 (en) | 2020-12-22 | 2022-06-23 | Tadano Demag Gmbh | Mobile crane with a luffing main boom and with an additional boom system |
| DE102020134714B4 (en) | 2020-12-22 | 2023-09-28 | Tadano Demag Gmbh | Mobile crane with a luffing main boom and an additional boom system |
| US11884521B2 (en) | 2020-12-22 | 2024-01-30 | Tadano Demag Gmbh | Mobile crane with a luffing main boom and with an additional boom system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130508 |
|
| CX01 | Expiry of patent term |