CN102491199B - Tower crane and balance arm thereof - Google Patents
Tower crane and balance arm thereof Download PDFInfo
- Publication number
- CN102491199B CN102491199B CN201110400979.8A CN201110400979A CN102491199B CN 102491199 B CN102491199 B CN 102491199B CN 201110400979 A CN201110400979 A CN 201110400979A CN 102491199 B CN102491199 B CN 102491199B
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- arm
- pull bar
- joint
- equilibrium
- equilibrium arm
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- 239000000725 suspension Substances 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a tower crane and a balance arm thereof. The balance arm comprises an arm section, a balance weight, a support and a pull rod, wherein the arm section comprises a first arm section, a second arm section and at least one middle arm section which are detachably and sequentially connected between the first arm section and the second arm section; the balance weight is arranged on the first arm section; the support is arranged on the second arm section; the length of the pull rod is adjustable, one end of the pull rod is connected with the support in a detachable way, and the other end of the pull rod is connected with any connection position in multiple different connection positions of the first arm section in a detachable manner. According to the invention, the length of the pull rod can be changed and the distance between the pull rod and the intersection points of the center line of the balance weight and the center line of the first arm section can be changed when the length of the balance arm is changed, thus stress condition of the arm section is improved, and the balance arm of the tower crane provided by the invention has the characteristics of simple structure, reliable performance and low cost.
Description
Technical field
The present invention relates to hoisting crane field, more specifically, relate to a kind of tower crane and equilibrium arm thereof.
Background technology
The equilibrium arm of tower crane of the prior art has two kinds of forms, and a kind of is that length is nonadjustable, and another kind is length-adjustable.
Fig. 1 shows the structural representation of the nonadjustable equilibrium arm of length of the prior art.As shown in Figure 1, tower crane is only equipped with the equilibrium arm of regular length, this equilibrium arm comprises arm joint 1 and pull bar 2, one end of arm joint 1 is provided with counterbalanced weight 3, the setting angle of pull bar 2 and connection location are changeless, in the situation that all brachiums of tower crane combine, all use the equilibrium arm of this regular length.Because the length of the equilibrium arm in Fig. 1 is nonadjustable, therefore, in the situation that use shorter crane arm, its economy is bad, and can affect the performance of tower crane.
Fig. 2 shows the structural representation of length-adjustable equilibrium arm of the prior art.As shown in Figure 2, this equilibrium arm comprises arm joint 1 and pull bar 2, and one end of arm joint 1 is provided with counterbalanced weight 3, and the angle of pull bar 2 is adjustable.On arm joint 1, only arrange one for the suspension centre hole of pull bar 2 is installed.When equilibrium arm is during by long shortening, pull bar 2 also correspondingly shortens, and one end of pull bar 2 changes to connection location B ' by connection location A ', and meanwhile, the angle of pull bar 2 increases to β by α; Correspondingly, the intersection point of the line of centers of pull bar 2 and arm joint 1 is by A " point moves to B " point, that is to say that the distance that this intersection point and arm are saved between 1 end is increased to X2 by X1.That is to say, when the length of equilibrium arm increases, the stress of arm joint 1 also increases thereupon, thereby its stressing conditions is degenerated.
Summary of the invention
The present invention aims to provide a kind of tower crane and equilibrium arm thereof, to solve the length of the prior art equilibrium arm problem that its stressing conditions also degenerates when elongated thereupon.
For solving the problems of the technologies described above, according to an aspect of the present invention, the equilibrium arm that a kind of tower crane is provided, comprising: arm joint, and arm joint comprises the first arm joint, the second arm joint and is removably connected at least one insert jib section between the first arm joint and the second arm joint in turn; Counterbalanced weight, counterbalanced weight is arranged on the first arm joint; Support, support is arranged on the second arm joint; The pull bar of adjustable in length, one end of pull bar is removably connected with support, and any connection location in a plurality of different connection location that the other end of pull bar saves from the first arm removably connects.
Further, a plurality of different connection location place on the first arm joint is provided with a plurality of suspension centres hole accordingly, and the other end of pull bar can removably be connected with any in a plurality of suspension centres hole.
Further, the other end of pull bar is removably connected by bearing pin with suspension centre hole.
Further, pull bar comprises a plurality of pull bar joints that removably connect successively.
Further, the number of insert jib section is one.
Further, pull bar comprises a plurality of pull bar joints that removably connect successively; Pull bar joint comprises the first pull bar joint, the second pull bar joint and is in turn arranged at least one the centre link joint between the first pull bar joint and the second pull bar joint.
According to another aspect of the present invention, provide a kind of tower crane, comprised equilibrium arm, this equilibrium arm is above-mentioned equilibrium arm.
The present invention is when changing equilibrium arm length, can change the length of pull bar and counterbalanced weight with the distance between the line of centers of pull bar and the intersection point of the line of centers of the first arm joint simultaneously, thereby improved the stressing conditions of arm joint, there is simple in structure, dependable performance, feature that cost is low.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 has schematically shown the structural representation of the nonadjustable equilibrium arm of length of the prior art;
Fig. 2 has schematically shown the structural representation of length-adjustable equilibrium arm of the prior art;
Fig. 3 has schematically shown the integral structure schematic diagram of the equilibrium arm in the present invention;
Fig. 4 has schematically shown the integral structure schematic diagram of removing an equilibrium arm after insert jib section in Fig. 3; And
The partial enlarged drawing that when Fig. 5 has schematically shown different brachiums variation, the first pull bar joint installation site changes.
The specific embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As a first aspect of the present invention, provide a kind of equilibrium arm of tower crane.As shown in Figure 3 and Figure 4, this equilibrium arm comprises: the pull bar 2 of arm joint 1, counterbalanced weight 3, support 4 and adjustable in length.Wherein, arm joint 1 comprises first arm joint the 11, second arm joint 12 and is removably connected at least one insert jib section 13 between first arm joint the 11 and second arm joint 12 in turn; Counterbalanced weight 3 is arranged on the first arm joint 11; Support 4 is arranged on the second arm joint 12; One end of pull bar 2 is removably connected with support 4, and any connection location in a plurality of different connection location of the other end of pull bar 2 and the first arm joint 11 removably connects.
Preferably, as shown in Figure 5, a plurality of different connection location place on the first arm joint 11 is provided with a plurality of suspension centres hole 111 accordingly, and the other end of pull bar 2 can removably be connected with any in a plurality of suspension centres hole 111.Especially, this other end of pull bar 2 is removably connected by bearing pin 5 with suspension centre hole 111.Preferably, on the first arm joint 11, be provided with suspension centre plate 112, suspension centre hole 111 is arranged on suspension centre plate 112.Therefore, when changing brachium, can select different suspension centre holes 111, thereby change counterbalanced weight 3 with the distance between the line of centers of pull bar and the intersection point of the line of centers of the first arm joint, to play the object of the stressing conditions that improves arm joint.
Preferably, pull bar 2 comprises a plurality of pull bar joints that removably connect successively.Especially, pull bar joint comprises first pull bar joint the 21, second pull bar joint 22 and is in turn arranged at least one the centre link joint 23 between first pull bar joint the 21 and second pull bar joint 22, and the first pull bar joint 21, centre link joint the 23 and second pull bar joint 22 removably connect, therefore, by increasing or reduce the number of centre link joint, just can realize the adjusting to the length of pull bar 2.In like manner, by increasing or reduce the number of insert jib section 13, just can realize the adjusting to the length of equilibrium arm.
Below in conjunction with Fig. 3 and Fig. 4, the use procedure of the equilibrium arm in the present invention is described.In the time equilibrium arm state variation as shown in Figure 3 need to being the state shown in Fig. 4, at least a portion at least a portion in insert jib section 13 (being whole insert jib sections in Fig. 3) and centre link joint 23 (in Fig. 3, being whole centre link joints) can be removed, thereby the length of equilibrium arm is shortened.Therefore, the length of arm joint and pull bar is all become adjustable, thereby the tower crane arm that can be different brachiums configure the equilibrium arm of different length, to improve the overall performance of tower crane.
Preferably, please further combined with Fig. 5, in the process of above-mentioned variation, the installation site of the first pull bar joint 21 is become a suspension centre hole 111 on the left side on the first arm joint 11 as shown in Figure 4 by a suspension centre hole 111 on the right of the first arm joint 11 shown in Fig. 3, correspondingly, the primary importance 6 of the intersection point of the line of centers of the line of centers of pull bar and the first arm joint in Fig. 5 is changed to the second place 7, like this, shortened counterbalanced weight 3 with the distance between the line of centers of pull bar and the intersection point of the line of centers of the first arm joint, make the stressing conditions of arm joint can not become because of the variation of brachium severe, make moderate progress on the contrary, thereby improved the stressed of arm joint.
Preferably, the number of insert jib section 13 is one or more.Preferably, the number of centre link joint 23 is one or more.Preferably, the number in suspension centre hole 111 is two above (comprising two).Because arm saves, the suspension centre hole of pull bar can be all a plurality of (for example, more than three), therefore, the length variations type of equilibrium arm also has the mode of multiple combination, thereby goes for the crane arm of different length.
As a second aspect of the present invention, a kind of tower crane is provided, comprise equilibrium arm, this equilibrium arm is the equilibrium arm in the various embodiments described above.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. an equilibrium arm for tower crane, is characterized in that, comprising:
Arm joint (1), described arm joint (1) comprises the first arm joint (11), the second arm joint (12) and is removably connected to described the first arm joint (11) in turn and described the second arm saves at least one insert jib section (13) between (12), to regulate the length of described equilibrium arm by the number increasing or reduce described insert jib section (13);
Counterbalanced weight (3), described counterbalanced weight (3) is arranged on described the first arm joint (11);
Support (4), described support (4) is arranged on described the second arm joint (12) regularly;
The pull bar of adjustable in length (2); one end of described pull bar (2) is removably connected with described support (4), and any connection location in a plurality of different connection location of the other end of described pull bar (2) and described the first arm joint (11) removably connects;
When changing the length of described equilibrium arm, select different described connection locations, thereby change described counterbalanced weight (3) with the distance between the line of centers of described pull bar (2) and the intersection point of the line of centers of described the first arm joint (11), to improve the stressing conditions of described arm joint (1).
2. equilibrium arm according to claim 1, it is characterized in that, described a plurality of different connection location place on described the first arm joint (11) is provided with a plurality of suspension centres hole (111) accordingly, and the other end of described pull bar (2) can removably be connected with any in described a plurality of suspension centres holes (111).
3. equilibrium arm according to claim 2, is characterized in that, the described other end of described pull bar (2) is removably connected by bearing pin (5) with described suspension centre hole (111).
4. according to the equilibrium arm described in any one in claim 1-3, it is characterized in that, described pull bar (2) comprises a plurality of pull bar joints that removably connect successively.
5. according to the equilibrium arm described in any one in claim 1-3, it is characterized in that, the number of described insert jib section (13) is one.
6. according to the equilibrium arm described in any one in claim 1-3, it is characterized in that, described pull bar (2) comprises a plurality of pull bar joints that removably connect successively; Described pull bar joint comprises that the first pull bar saves (21), the second pull bar saves (22) and is in turn arranged on described the first pull bar and saves at least one the centre link joint (23) between (21) and described the second pull bar joint (22).
7. a tower crane, comprises equilibrium arm, it is characterized in that, described equilibrium arm is the equilibrium arm described in any one in claim 1-6.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110400979.8A CN102491199B (en) | 2011-12-06 | 2011-12-06 | Tower crane and balance arm thereof |
| PCT/CN2012/081970 WO2013082969A1 (en) | 2011-12-06 | 2012-09-26 | Balance arm of tower crane and crane using the balance arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110400979.8A CN102491199B (en) | 2011-12-06 | 2011-12-06 | Tower crane and balance arm thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102491199A CN102491199A (en) | 2012-06-13 |
| CN102491199B true CN102491199B (en) | 2014-04-02 |
Family
ID=46183070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110400979.8A Active CN102491199B (en) | 2011-12-06 | 2011-12-06 | Tower crane and balance arm thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102491199B (en) |
| WO (1) | WO2013082969A1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102491199B (en) * | 2011-12-06 | 2014-04-02 | 中联重科股份有限公司 | Tower crane and balance arm thereof |
| CN102942126B (en) * | 2012-11-19 | 2015-09-30 | 徐州重型机械有限公司 | A kind of equilibrium arm of tower crane and tower crane |
| CN103863953B (en) * | 2014-02-13 | 2015-11-18 | 徐州建机工程机械有限公司 | A kind of flat-top tower crane fast-assembling type Tiebar structure |
| CN104030175A (en) * | 2014-05-12 | 2014-09-10 | 江苏大通重工有限公司 | Connection apparatus for rear-oblique pull rod of miniature tower-type hoisting machinery |
| CN104512818A (en) * | 2014-12-19 | 2015-04-15 | 徐州建机工程机械有限公司 | Auxiliary device for mounting tower crane |
| DE102018122349A1 (en) | 2018-09-13 | 2020-03-19 | Liebherr-Werk Biberach Gmbh | crane |
| 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 |
| CN110395668A (en) * | 2019-08-08 | 2019-11-01 | 新疆庞源机械工程有限公司 | A kind of cantilever crane of installation derrick crane attachment pull rod |
| CN110790160B (en) * | 2019-11-05 | 2020-09-08 | 上海兴友工程机械有限公司 | Rear counterweight structure for crawler crane |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US3278045A (en) * | 1964-03-09 | 1966-10-11 | American Hoist & Derrick Co | Counterweight support mechanism |
| DE3226211C2 (en) * | 1981-12-21 | 1986-06-12 | Liebherr-Werk Biberach Gmbh, 7950 Biberach | Tower crane |
| SU1657467A1 (en) * | 1989-01-20 | 1991-06-23 | Ленинградское научно-производственное объединение строительного и коммунального машиностроения | Boom crane |
| EP0846650A1 (en) * | 1996-12-03 | 1998-06-10 | Potain | Method and device for mounting jib tension elements on tower cranes |
| JP3948793B2 (en) * | 1997-09-12 | 2007-07-25 | 株式会社加藤製作所 | Tension rod |
| CN201334326Y (en) * | 2008-12-31 | 2009-10-28 | 长沙中联重工科技发展股份有限公司 | Pull rod for balance arm of flat-top tower crane |
| CN101979308A (en) * | 2010-10-14 | 2011-02-23 | 长沙中联重工科技发展股份有限公司 | Tower crane, pull rod structure for balance arm thereof and mounting method for structure |
| CN202322115U (en) * | 2011-12-06 | 2012-07-11 | 中联重科股份有限公司 | Tower crane and balancing boom thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3245511A1 (en) * | 1982-12-09 | 1984-06-14 | Dieter 7300 Esslingen Böhm | Crane, in particular a tower slewing crane |
| DE3307892C2 (en) * | 1983-03-05 | 1986-09-11 | Pekazett Baumaschinen GmbH, 6660 Zweibrücken | Tower crane with jib and counter jib |
| JPH0328066Y2 (en) * | 1986-06-03 | 1991-06-17 | ||
| JP3180204B2 (en) * | 1993-10-20 | 2001-06-25 | 大成建設株式会社 | Horizontal jib tower crane |
| JPH0948589A (en) * | 1995-08-09 | 1997-02-18 | Hitachi Constr Mach Co Ltd | Swing lever of tower crane |
| JPH09104588A (en) * | 1995-10-06 | 1997-04-22 | Komatsu Ltd | Auxiliary jib protrusion and storage device for crane |
| JPH10218565A (en) * | 1997-02-12 | 1998-08-18 | Kato Works Co Ltd | Tension rod |
| DE19912758A1 (en) * | 1999-03-22 | 2000-09-28 | Sebastian Hoeppner | Crane with movable counter weight has limit switches registering when jib unit tilts forwards or back and sending signal to electronic switch to cause counter weight to adapt automatically |
| CN102491199B (en) * | 2011-12-06 | 2014-04-02 | 中联重科股份有限公司 | Tower crane and balance arm thereof |
-
2011
- 2011-12-06 CN CN201110400979.8A patent/CN102491199B/en active Active
-
2012
- 2012-09-26 WO PCT/CN2012/081970 patent/WO2013082969A1/en active Application Filing
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3278045A (en) * | 1964-03-09 | 1966-10-11 | American Hoist & Derrick Co | Counterweight support mechanism |
| DE3226211C2 (en) * | 1981-12-21 | 1986-06-12 | Liebherr-Werk Biberach Gmbh, 7950 Biberach | Tower crane |
| SU1657467A1 (en) * | 1989-01-20 | 1991-06-23 | Ленинградское научно-производственное объединение строительного и коммунального машиностроения | Boom crane |
| EP0846650A1 (en) * | 1996-12-03 | 1998-06-10 | Potain | Method and device for mounting jib tension elements on tower cranes |
| JP3948793B2 (en) * | 1997-09-12 | 2007-07-25 | 株式会社加藤製作所 | Tension rod |
| CN201334326Y (en) * | 2008-12-31 | 2009-10-28 | 长沙中联重工科技发展股份有限公司 | Pull rod for balance arm of flat-top tower crane |
| CN101979308A (en) * | 2010-10-14 | 2011-02-23 | 长沙中联重工科技发展股份有限公司 | Tower crane, pull rod structure for balance arm thereof and mounting method for structure |
| CN202322115U (en) * | 2011-12-06 | 2012-07-11 | 中联重科股份有限公司 | Tower crane and balancing boom thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102491199A (en) | 2012-06-13 |
| WO2013082969A1 (en) | 2013-06-13 |
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Address after: 415106 Dingcheng City, Changde Province, the town of irrigation district ZOOMLION Creek Industrial Park Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
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Address after: 410013 Yuelu District, Hunan, silver basin Road, No. 361, No. Patentee after: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. Address before: 415106 Dingcheng City, Changde Province, the town of irrigation district ZOOMLION Creek Industrial Park Patentee before: ZOOMLION HEAVY INDUSTRY SCIENCE&TECHNOLOGY Co.,Ltd. |
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