CN101618838B - Large tonnage crane and jibs thereof - Google Patents
Large tonnage crane and jibs thereof Download PDFInfo
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- CN101618838B CN101618838B CN2008101252875A CN200810125287A CN101618838B CN 101618838 B CN101618838 B CN 101618838B CN 2008101252875 A CN2008101252875 A CN 2008101252875A CN 200810125287 A CN200810125287 A CN 200810125287A CN 101618838 B CN101618838 B CN 101618838B
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Abstract
The invention discloses a jib of a large tonnage crane, which comprises a main arm and an auxiliary arm selectively and fixedly connected to the tail end of the main arm. The main arm is provided with a pulley block which can be detachably arranged on the head of the main arm. The pulley block on the head of the main arm can be a combined type pulley block. Because the pulley block is arranged in a detachable mode, the pulley block on the head of the main arm can be detached when the auxiliary arm of the crane works, the self weight of the whole jib is obviously reduced and the stress condition is obviously improved so that the hoisting weight when the auxiliary arm works is increased. When the pulley block on the head of the main arm is the combined type pulley block, the number of the combined type pulleys connected to the head of the main arm can be selected according to the arm length and the hoisting weight so that the weight at the tail end of the main arm can be reduced and the hoisting property is improved. Meanwhile, the requirements of smooth hoisting can be satisfied.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of crane arm of hoister in large tonnage.In addition, the invention still further relates to a kind of hoister in large tonnage that comprises above-mentioned crane arm.
Background technology
Along with the fast development of China's economic construction, market increases day by day for the demand of hoister in large tonnage.
Hoister in large tonnage should have bigger total arm length, higher lifting altitude and the heavier liter weight that rises; In order to realize these design objectives, the crane arm of hoister in large tonnage should have less relatively deadweight, thereby can reduce the amount of deflection of crane arm under equal load-carrying condition, and then improves maximum and play lifting performances such as liter weight.
The crane arm of existing hoister in large tonnage generally includes principal arm and auxiliary, and in most cases auxiliary leaves unused and only principal arm work, when needs increase brachium auxiliary is fixedly connected on the principal arm end, thereby can realizes the auxiliary operation.
The crane arm deadweight of above-mentioned existing hoister in large tonnage is heavier; The specification of assembly pulley that is fixedly connected on its principal arm and auxiliary end is also relatively large, and therefore described assembly pulley also has bigger weight usually.
On the one hand, bigger specification is necessary; Because a liter weight of hoister in large tonnage big (especially under the short situation of crane arm brachium) successfully promotes weight with regard to being difficult to if the specification of the assembly pulley of crane arm end is big inadequately.But on the other hand, bigger specification promptly means bigger deadweight; The assembly pulley that is positioned at the crane arm end is fairly obvious to the influence of crane arm amount of deflection, the deadweight that this assembly pulley is bigger has strengthened the amount of deflection of crane arm, thereby restricted the raising (under the long situation of crane arm brachium, big this shortcoming of assembly pulley deadweight is more remarkable to the restriction of lifting weight) of lifting weight.
According to existing understanding, though the deadweight of the assembly pulley of crane arm principal arm and auxiliary end has strengthened the amount of deflection of crane arm, and then significantly restricted the raising of lifting weight (the lifting weight when particularly brachium is longer), this is unavoidable; This understanding has directly caused the lifting performance of hoister in large tonnage to improve slowly.
Therefore, how reducing assembly pulley to the adverse effect that lifting performance produced, and then promote the lifting performance of hoister in large tonnage, is the present technical issues that need to address of those skilled in the art.
Summary of the invention
The crane arm that the purpose of this invention is to provide a kind of hoister in large tonnage has lighter deadweight, thereby can reduce the amount of deflection of crane arm in hanging the loads process, and then improves lifting performances such as lifting weight.Another object of the present invention provides a kind of hoister in large tonnage that comprises above-mentioned crane arm.
For solving the problems of the technologies described above, the invention provides a kind of crane arm of hoister in large tonnage, comprise principal arm and the auxiliary that selectively is fixedly connected on described principal arm end, described principal arm is equipped with assembly pulley, and described assembly pulley is installed on the principal arm head removably; The assembly pulley of described principal arm head further comprises two Combined pulley, and two described Combined pulley are installed on described principal arm head respectively removably; Two described Combined pulley all have two pipe links along the axial distribution of pulley, the head of described principal arm has four equally along the connecting panel of the axial distribution of pulley, and the axial distance of two adjacent connecting panels equals the axial distance between two pipe links of same described Combined pulley.
Preferably, described crane arm auxiliary head is installed the assembly pulley that comprises at least one Combined pulley; Described Combined pulley is installed on described auxiliary head removably.
Preferably, the specification of the Combined pulley of described auxiliary head is identical with the specification of the Combined pulley of described principal arm head.
Preferably, described Combined pulley is connected in the head of described principal arm or the head of auxiliary by bearing pin.
The present invention also provides a kind of hoister in large tonnage, comprises the crane arm of above-mentioned each described hoister in large tonnage.
Preferably, described hoister in large tonnage is specially crawler crane.
Preferably, described hoister in large tonnage is specially wheel crane.
The crane arm of hoister in large tonnage provided by the present invention, the assembly pulley of its principal arm head is installed by removable mode, therefore, the assembly pulley of principal arm head can be pulled down when hoisting crane carries out the auxiliary operation.Because the deadweight of the assembly pulley of principal arm head is heavier, the distance of this assembly pulley and crane arm root hinge is far away simultaneously, the deadweight of therefore it being pulled down the whole crane arm in back significantly alleviates, force-bearing situation significantly improves, its amount of deflection is also alleviated, and then the lifting weight when having promoted the auxiliary operation.
A kind of preferred embodiment in, the assembly pulley of described crane arm principal arm head further comprises at least two separate Combined pulley, each described Combined pulley can be installed on the head of described principal arm respectively; The assembly pulley that also is the principal arm head is " compound type " assembly pulley.Like this, during the principal arm operation, can be connected in the number of the Combined pulley of principal arm head according to the situation selection of brachium and lift heavy.When brachium is long, a small amount of described Combined pulley can meet the demands when lift heavy was relatively light, therefore can alleviate the principal arm end weight, improve lifting performance; When brachium is short, lift heavy is heavier relatively situation, can increase the number of described Combined pulley, to satisfy the requirement of lifting smoothly.
In addition, above-mentioned " compound type " assembly pulley single-piece weight and volume is all less, to transportation means require relatively lowly, this has made things convenient for transportation, and then has reduced traffic cost.On the other hand, because the single-piece volume is less, the rotating shaft of described Combined pulley is also shorter relatively, and this has reduced the requirement of Fabricating machinery and the difficulty of process operation.
In another preferred embodiment, the Combined pulley of described auxiliary head is to install removably equally, and its specification is identical with the specification of the Combined pulley of described principal arm head.Like this, the Combined pulley of pulling down can be installed on the auxiliary head during auxiliary operation on principal arm, therefore needn't be specially for auxiliary set Combined pulley, thus promptly can save at least one Combined pulley, reduced cost.
Owing to comprise above-mentioned crane arm, hoister in large tonnage provided by the present invention obviously also has above-mentioned advantage, does not repeat them here.
Description of drawings
Fig. 1 looks scheme drawing for the master of a kind of specific embodiment of principal arm head provided by the present invention;
Fig. 2 is the schematic side view of principal arm head shown in Figure 1;
Fig. 3 looks scheme drawing for the master of a kind of specific embodiment of Combined pulley provided by the present invention;
Fig. 4 is the schematic side view of Combined pulley shown in Figure 3;
Schematic side view when Fig. 5 is Fig. 1 and principal arm head shown in Figure 2 installation Combined pulley;
Master when Fig. 6 is Fig. 1 and two Combined pulley of principal arm head shown in Figure 2 installation looks scheme drawing;
Master when Fig. 7 installs single Combined pulley for Fig. 1 and principal arm head shown in Figure 2 looks scheme drawing;
Fig. 8 looks scheme drawing for the master of a kind of specific embodiment of auxiliary head provided by the present invention;
Fig. 9 is the schematic side view of auxiliary head shown in Figure 8;
Master when Figure 10 installs single Combined pulley for Fig. 8 and auxiliary head shown in Figure 9 looks scheme drawing;
Schematic side view when Figure 11 installs single Combined pulley for Fig. 8 and auxiliary head shown in Figure 9.
The specific embodiment
Core of the present invention provides a kind of crane arm of hoister in large tonnage, has lighter deadweight, thereby can reduce the amount of deflection of crane arm in hanging the loads process, and then improves lifting performances such as lifting weight.Another core of the present invention provides a kind of hoister in large tonnage that comprises above-mentioned crane arm.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1 and Fig. 2, Fig. 1 looks scheme drawing for the master of a kind of specific embodiment of principal arm head provided by the present invention; Fig. 2 is the schematic side view of principal arm head shown in Figure 1.
In a kind of specific embodiment, the principal arm head 1 of hoister in large tonnage crane arm provided by the present invention is fixedly connected on the end of principal arm 3 (being shown among Fig. 5); Principal arm 3 and principal arm head 1 can have truss structure.
It is pointed out that technical scheme of the present invention can not only limit to the truss-like crane arm, telescopic boom even collapsible crane arm can adopt technical scheme of the present invention; Therefore the specific constructive form of crane arm can not be used for limiting protection scope of the present invention.
Principal arm head 1 can be provided with some connecting panels 11, offers first connecting bore on the connecting panel 11, in order to connect assembly pulley.Principal arm head 1 can also have some second connecting bores 12, principal arm head 1 can be fixedly connected on the end of principal arm 3 by connecting pin and above-mentioned second connecting bore 12.
Please refer to Fig. 3 and Fig. 4, Fig. 3 looks scheme drawing for the master of a kind of specific embodiment of Combined pulley provided by the present invention; Fig. 4 is the schematic side view of Combined pulley shown in Figure 3.
The assembly pulley that is installed on principal arm head 1 specifically can comprise at least two Combined pulley 2.A plurality of coaxial pulleys form a combinations thereof pulley 2, each Combined pulley 2 and then constitute described assembly pulley.
Each Combined pulley 2 specifically can comprise some pipe links 21, and an end of pipe link 21 is captiveed joint with the rotating shaft of Combined pulley 2, and the other end of pipe link 21 has the 3rd connecting bore 22.Between the pipe link 21 and strut bar 23 can be set, to strengthen the integral structure of described Combined pulley 2.
Please refer to Fig. 5, the schematic side view when Fig. 5 is Fig. 1 and principal arm head shown in Figure 2 installation Combined pulley.
Assembly pulley provided by the present invention is installed on principal arm head 1 in removable mode.Specifically, the 3rd connecting bore 22 of the Combined pulley 2 of described assembly pulley the position is set, corresponding with the position of first connecting bore of offering on the connecting panel 11 of principal arm head 1, therefore can run through above-mentioned first connecting bore and the 3rd connecting bore 22 by bearing pin 4, thereby both are connected in one; The dismounting operation of this connection mode is comparatively convenient.
The crane arm of hoister in large tonnage provided by the present invention, the assembly pulley that is arranged at its principal arm head 1 is installed in removable mode, therefore, the autonomous arm head of described assembly pulley portion 1 can be pulled down when hoisting crane carries out the auxiliary operation.Because the deadweight of described assembly pulley is heavier, the distance of this assembly pulley and crane arm root hinge is far away simultaneously, the deadweight of therefore it being pulled down the whole crane arm in back significantly alleviates, force-bearing situation significantly improves, and its amount of deflection is also significantly alleviated, and then the lifting weight when having promoted the auxiliary operation.
Please refer to Fig. 6 and Fig. 7, the master when Fig. 6 is Fig. 1 and two Combined pulley of principal arm head shown in Figure 2 installation looks scheme drawing; Master when Fig. 7 installs single Combined pulley for Fig. 1 and principal arm head shown in Figure 2 looks scheme drawing.
As previously mentioned, described assembly pulley specifically can only comprise a Combined pulley 2, also can comprise two or more separate Combined pulley 2; Also be that principal arm head 1 can only be installed a combinations thereof pulley 2 (as shown in Figure 7), two or more Combined pulley 2 (as shown in Figure 6) also can be installed.
Because each Combined pulley 2 all can be installed on principal arm head 1 separately, and independently arm head portion 1 pulls down separately, therefore described assembly pulley belongs to " compound type " assembly pulley.Like this, when carrying out the principal arm operation, can be connected in the number of the Combined pulley 2 of principal arm head 1 according to the situation selection of brachium and lift heavy.When brachium is long, small number of combinations pulley 2 can meet the demands when lift heavy was relatively light, and a Combined pulley 2 can only be installed as shown in Figure 7, can alleviate weight, the raising lifting performance of principal arm end like this; When brachium is short, lift heavy is heavier relatively situation, can increase the number of Combined pulley 2, two Combined pulley 2 can be installed as shown in Figure 6, to satisfy the requirement of lifting smoothly.
In addition, above-mentioned " compound type " assembly pulley single-piece weight and volume is all less, to transportation means require relatively lowly, this has made things convenient for transportation, and then has reduced traffic cost.On the other hand, because the single-piece volume is less, the rotating shaft of Combined pulley 2 is also shorter relatively, and this has reduced the requirement of Fabricating machinery and the difficulty of process operation.
Certainly, at principal arm head 1 plural Combined pulley 2 being installed also is fine.
Please refer to Fig. 8 and Fig. 9, Fig. 8 looks scheme drawing for the master of a kind of specific embodiment of auxiliary head provided by the present invention; Fig. 9 is the schematic side view of auxiliary head shown in Figure 8.
In a kind of specific embodiment, the auxiliary head 5 of hoister in large tonnage crane arm provided by the present invention is fixedly connected on the end of auxiliary 6 (being shown among Fig. 9); Auxiliary 6 and auxiliary head 5 can have truss structure.
Please refer to Figure 10 and Figure 11, the master when Figure 10 installs single Combined pulley for Fig. 8 and auxiliary head shown in Figure 9 looks scheme drawing; Schematic side view when Figure 11 installs single Combined pulley for Fig. 8 and auxiliary head shown in Figure 9.
Assembly pulley provided by the present invention is installed on auxiliary head 5 in removable mode.Specifically, constitute described assembly pulley Combined pulley 2 the 3rd connecting bore 22 the position is set, corresponding with the position of establishing the 4th connecting bore of being opened on the adapter plate 51 of auxiliary head 5, therefore can run through above-mentioned the 4th connecting bore and the 3rd connecting bore 22 by bearing pin 7, thereby both are connected in one.
In addition, be installed on the specification of the Combined pulley 2 of auxiliary head 5, can be identical with the specification of the Combined pulley 2 that is installed on principal arm head 1, also be that the Combined pulley 2 of auxiliary head 5 can exchange with the Combined pulley 2 of principal arm head 1.Like this, the Combined pulley of pulling down 2 can be installed on auxiliary head 5 when hoisting crane carries out the auxiliary operation on principal arm 3, therefore needn't set Combined pulley 2 for auxiliary 6 specially, thereby promptly can save at least one Combined pulley 2, reduce cost.
Hoister in large tonnage provided by the present invention comprises above-mentioned crane arm, and other structures of this hoisting crane can be with reference to prior art, and this paper repeats no more.
Above-mentioned hoister in large tonnage can be a crawler crane, also can be wheel crane.Protection scope of the present invention is not subjected to the restriction of hoisting crane particular type.
More than hoister in large tonnage provided by the present invention and crane arm thereof are described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (6)
1. the crane arm of a hoisting crane comprises principal arm and the auxiliary that selectively is fixedly connected on described principal arm end, and described principal arm is equipped with assembly pulley, it is characterized in that, described assembly pulley is installed on the principal arm head removably; The assembly pulley of described principal arm head further comprises two Combined pulley, and two described Combined pulley are installed on described principal arm head respectively removably; Two described Combined pulley all have two pipe links along the axial distribution of pulley, the head of described principal arm has four equally along the connecting panel of the axial distribution of pulley, and the axial distance of two adjacent connecting panels equals the axial distance between two pipe links of same described Combined pulley.
2. the crane arm of hoisting crane as claimed in claim 1 is characterized in that, described crane arm auxiliary head is installed the assembly pulley that comprises at least one Combined pulley; Described Combined pulley is installed on described auxiliary head removably; The specification of the Combined pulley of described auxiliary head is identical with the specification of the Combined pulley of described principal arm head.
3. the crane arm of hoisting crane as claimed in claim 2 is characterized in that, described Combined pulley is connected in the head of described principal arm or the head of auxiliary by bearing pin.
4. a hoisting crane is characterized in that, comprises the crane arm of each described hoisting crane of claim 1 to 3.
5. hoisting crane as claimed in claim 4 is characterized in that, is specially crawler crane.
6. hoisting crane as claimed in claim 5 is characterized in that, is specially wheel crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101252875A CN101618838B (en) | 2008-06-30 | 2008-06-30 | Large tonnage crane and jibs thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101252875A CN101618838B (en) | 2008-06-30 | 2008-06-30 | Large tonnage crane and jibs thereof |
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| Publication Number | Publication Date |
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| CN101618838A CN101618838A (en) | 2010-01-06 |
| CN101618838B true CN101618838B (en) | 2011-09-28 |
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| CN2008101252875A Active CN101618838B (en) | 2008-06-30 | 2008-06-30 | Large tonnage crane and jibs thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092646A (en) * | 2011-03-08 | 2011-06-15 | 上海三一科技有限公司 | Multifunctional arm head of crane |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201071265Y (en) * | 2006-12-28 | 2008-06-11 | 长沙中联重工科技发展股份有限公司 | Movable pulley assembly device for suspension arm |
| CN201272661Y (en) * | 2008-06-30 | 2009-07-15 | 徐州重型机械有限公司 | Large-tonnage crane and its elevator beam |
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2008
- 2008-06-30 CN CN2008101252875A patent/CN101618838B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201071265Y (en) * | 2006-12-28 | 2008-06-11 | 长沙中联重工科技发展股份有限公司 | Movable pulley assembly device for suspension arm |
| CN201272661Y (en) * | 2008-06-30 | 2009-07-15 | 徐州重型机械有限公司 | Large-tonnage crane and its elevator beam |
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| CN101618838A (en) | 2010-01-06 |
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Owner name: XCMG CONSTRUCTION MACHINERY CO., LTD.CONSTRUCTION Free format text: FORMER OWNER: XUZHOU HEAVY MACHINERY CO., LTD. Effective date: 20100608 |
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Free format text: CORRECT: ADDRESS; FROM: 221004 NO.165, TONGSHAN ROAD, XUZHOU CITY, JIANGSU PROVINCE TO: 221004 NO.19, TAOSHAN ROAD, ECONOMIC DEVELOPMENT ZONE, XUZHOU CITY, JIANGSU PROVINCE |
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Effective date of registration: 20100608 Address after: 221004 No. 19 Peach Road, Xuzhou Economic Development Zone, Jiangsu, China Applicant after: Building Machinery Co., Ltd., XCMG Construction Machinery Co., Ltd. Address before: 221004 Xuzhou, Zhejiang Province, Jiangsu Road No. 165 Applicant before: Xuzhou Heavy Machinery Co., Ltd. |
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