CN105347207A - Combined type cantilever crane - Google Patents
Combined type cantilever crane Download PDFInfo
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- CN105347207A CN105347207A CN201510902584.6A CN201510902584A CN105347207A CN 105347207 A CN105347207 A CN 105347207A CN 201510902584 A CN201510902584 A CN 201510902584A CN 105347207 A CN105347207 A CN 105347207A
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- jib
- matrix
- main chord
- compound type
- expansion
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- 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
- B66C23/64—Jibs
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- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to the technical field of hoisting equipment, in particular to a combined type cantilever crane which comprises a basal body cantilever crane, an expanding cantilever crane and a cantilever crane connecting device, wherein the expanding cantilever crane is detachably connected onto at least one side face of the basal body cantilever crane through the cantilever crane connecting device. According to the invention, an integrated welding cantilever crane is modified into the detachable combined type cantilever crane, so that the design of the cantilever crane is free from limitation of transportation clearance, shipping weight and the like, and the bearing capacity of the cantilever crane is improved by times to meet the requirement for the bearing capacity of the cantilever crane from ultra-large type hoisting equipment.
Description
Technical field
The present invention relates to technical field of crane equipment, particularly a kind of compound type jib.
Background technology
Along with the fast development that international energy and chemical engineering are built, in engineering construction, modularization, maximization and integrated lifting requirements improve constantly, and have higher requirement to the hoisting capacity of weight-lifting equipment and hoisting moment.Boom system is as the main bearing member of weight-lifting equipment, and the characteristic such as version, load-carrying capacity of himself directly affects in-use performance and the lifting performance of complete machine.
From stressed aspect, jib belongs to bi-axial bending moment, namely when weight-lifting equipment hangs the work of carrying, jib all bears the effect of axial force and moment of flexure in luffing plane and plane of rotation, luffing plane refers to jib and the determined plane of luffing arm-tie, in luffing plane, jib is analyzed as the mechanical model of two ends freely-supported; Plane of rotation refer to parallel ground and with the plane of luffing plane orthogonal, in plane of rotation, jib as one end fix one end freely mechanical model analyze.Therefore, from telescopic boom section analysis, need enough sectional areas, to ensure telescopic boom section intensity, thus the effect of opposing axial force, and need enough sections width and height to ensure the moment of inertia in two planes, thus improve unbending.Visible, in order to improve the load-carrying capacity of jib, need to increase the specification of main chord 1 ' and the sectional dimension of jib.
But, increase telescopic boom section size and make jib meet transportation clearance to require it is the problem of conflict, and the technology barrier that how to solve that this problem become that weight-lifting equipment develops to ultra-large type crucial.As shown in Figure 1-2, in the prior art, the jib of weight-lifting equipment adopts the truss structure by four main chords 1 ' and the welding of some web members 2 ' usually, it can realize the connection between jib by the connection mode of joint and bearing pin on length L direction, but it is parallel to two sides (the depth of section direction in Fig. 2) of luffing plane at (jib be installed on weight-lifting equipment after) and is single layer structure with two sides (the section width direction in Fig. 2) becoming spoke plane orthogonal, because existing jib is integrated welded structure, the sectional dimension (section width B and depth of section H) increasing jib then means the transportation clearance that can increase jib, increase the weight of jib, cause transport inconvenience.Visible, be subject to transportation clearance and transport heavy quantitative limitation, the jib structure of existing one Type of Welding can not meet the requirement of ultra-large type weight-lifting equipment to jib load-carrying capacity.
Summary of the invention
A technical matters to be solved by this invention is: existing jib is integrated welded structure, is subject to transportation clearance and transport heavy quantitative limitation, and it can not meet the requirement of ultra-large type weight-lifting equipment to jib load-carrying capacity.
In order to solve the problems of the technologies described above, the invention provides a kind of compound type jib, it comprises matrix jib, expansion jib and arm support connection device, and expansion jib is removably connected at least one side of matrix jib by arm support connection device.
Alternatively, arm support connection device comprises the first connecting portion, the second connecting portion and attaching parts, and the first connecting portion is connected on matrix jib, and the second connecting portion is connected on expansion jib, and the first connecting portion and the second connecting portion are removably connected by attaching parts.
Alternatively, the first connecting portion is slot, and the second connecting portion is the plate that can insert in slot, and attaching parts is the first bearing pin, and on slot and plate, correspondence is provided with pin-and-hole, and the first bearing pin can realize removably connecting of slot and plate through pin-and-hole.
Alternatively, the first connecting portion is sleeve, and the second connecting portion is the sleeve pipe that can insert in sleeve, and attaching parts is the second bearing pin, and on sleeve and sleeve pipe, correspondence is provided with pin-and-hole, and the second bearing pin can realize removably connecting of sleeve and sleeve pipe through pin-and-hole.
Alternatively, arm support connection device comprises envelope part and lock piece, envelope part have peristome with by the main chord of matrix jib and expansion jib main chord envelope wherein, lock piece be used for the peristome of envelope part is closed.
Alternatively, the first end of lock piece is connected to the first side of the peristome of envelope part rotationally, and the second side of the second end of lock piece and the peristome of envelope part removably connects.
Alternatively, the first end of lock piece is connected to the first side of the peristome of envelope part rotationally by the 3rd bearing pin or bolt.
Alternatively, the second end of lock piece is provided with mounting hole, and also fastener locking in mounting hole can be inserted in the second side of the peristome of envelope part.
Alternatively, the side of the peristome of the close envelope part of lock piece is provided with bracket, and when the peristome of envelope part is closed by lock piece, the main chord of matrix jib or the main chord of expansion jib contact with bracket.
Alternatively, the main chord of matrix jib contacts with bracket, and the surface contacted with the main chord of matrix jib of bracket has the shape adapted with matrix jib; Or the main chord of expansion jib contacts with bracket, the surface contacted with the main chord of expansion jib of bracket has the shape adapted with the main chord of expansion jib.
Alternatively, arm support connection device also comprises cushion block, cushion block be arranged on matrix jib main chord and expansion jib main chord between with make matrix jib and expansion jib between from a distance.
Alternatively, cushion block has the first surface adapted with the main chord of expansion jib; And/or cushion block has the second surface adapted with the main chord of matrix jib.
Alternatively, it is characterized in that, envelope part is U-shaped frame.
Compound type jib provided by the present invention, it adopts arm support connection device matrix jib and expansion jib to be removably connected, change the welding jib of integral type into detouchable compound type jib, make the design of jib no longer by the restriction of the factor such as transportation clearance, domestic shipping weight, the load-carrying capacity of jib can significantly improve, thus can meet the requirement of ultra-large type weight-lifting equipment to jib load-carrying capacity.
By being described in detail exemplary embodiment of the present invention referring to accompanying drawing, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 illustrates the front view of jib structure of the prior art.
Fig. 2 illustrates the section drawing of jib structure of the prior art.
Fig. 3 illustrates the front view of the compound type jib of first embodiment of the invention.
Fig. 4 illustrates the block diagram of matrix jib embodiment illustrated in fig. 3.
Fig. 5 illustrates the front view of matrix jib embodiment illustrated in fig. 3.
Fig. 6 illustrates the block diagram of expansion jib embodiment illustrated in fig. 3.
Fig. 7 illustrates the front view of expansion jib embodiment illustrated in fig. 3.
Fig. 8 illustrates the front view of the compound type jib of second embodiment of the invention.
Fig. 9 illustrates the front view of matrix jib embodiment illustrated in fig. 8.
Figure 10 illustrates the front view of expansion jib embodiment illustrated in fig. 8.
Figure 11 illustrates the block diagram of sleeve embodiment illustrated in fig. 8.
Figure 12 illustrates the block diagram of sleeve pipe embodiment illustrated in fig. 8.
Figure 13 illustrates the front view of the compound type jib of third embodiment of the invention.
Structural representation when Figure 14 illustrates that U-shaped frame embodiment illustrated in fig. 13 is in closed state.
Structural representation when Figure 15 illustrates that U-shaped frame embodiment illustrated in fig. 13 is in open mode.
Figure 16 illustrates the structural representation of cushion block embodiment illustrated in fig. 13.
In figure:
1 ', main chord; 2 ', web member;
1, matrix jib; 2, jib is expanded; 31, slot; 32, plate; 33, the first bearing pin; 41, sleeve; 42, sleeve pipe; 43, the second bearing pin; 51, U-shaped frame; 52, lock piece; 521, bracket; 53, the 3rd bearing pin; 54, nut; 55, cushion block.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not carrying out the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification sheets.
In describing the invention, it will be appreciated that, the noun of locality is if the indicated orientation such as " forward and backward, upper and lower, left and right ", " laterally, vertical, vertical, level " and " top, the end " or position relationship are normally based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, when not doing contrary explanation, these nouns of locality do not indicate and imply that the device of indication or element must have specific orientation or with specific azimuth configuration and operation, therefore can not be interpreted as limiting the scope of the invention; The noun of locality " inside and outside " refers to inside and outside the profile relative to each parts itself.
In describing the invention; it will be appreciated that; the word such as " first ", " second " is used to limit parts; be only used to be convenient to distinguish corresponding parts; as there is no Stated otherwise; above-mentioned word does not have particular meaning, therefore can not be interpreted as limiting the scope of the invention.
Fig. 3-16 shows three embodiments of the present invention.With reference to Fig. 3-16, compound type jib provided by the present invention, comprises matrix jib 1, expansion jib 2 and arm support connection device, wherein, expands jib 2 by arm support connection device along at least one side being removably connected to matrix jib 1.
Compound type jib provided by the present invention, the welding mentality of designing that it breaks traditions, adopt arm support connection device that matrix jib 1 and expansion jib 2 are carried out detachable connection along at least one side of matrix jib 1, change the welding jib of integral type into detouchable compound type jib, enable the sectional dimension of jib no longer by transportation clearance, the restriction of the factors such as domestic shipping weight, thus effectively can solve the problem that jib load-carrying capacity and jib transportation clearance limit this conflict, significantly improve the load-carrying capacity of jib, for weight-lifting equipment provides basis to ultra-large type development.In addition, detouchable compound type jib can lift the boom system of demand and lifting condition assembling formation load-carrying capacity not of the same race according to reality, the demand of different operating mode can be met on the one hand, apply more flexible, the load-carrying capacity of jib self can also be made to reach good mating with the overall performance of weight-lifting equipment on the other hand, the performance of overall performance and jib self is more effectively utilized.And jib is strengthened mode and changes build-up type into by welded type, also make the processing technology of jib more simple, the improvement of jib performance is more prone to realize, thus effectively can reduce the productive costs of jib.
Three embodiments of the present invention are all rectangular compound type jib for cross sectional shape, and all for expand jib 2 be connected to matrix jib 1 perpendicular on two that become spoke plane relative sides (side namely corresponding to section width), the present invention will be described.In other embodiments, expanding jib also can only be connected to perpendicular on a side in two that become spoke plane relative sides; Or, can also be connected in cross sectional shape is for rectangular compound type jib and be parallel on the relative side (side namely corresponding to depth of section) of two of becoming spoke plane; Be respectively on each side in all four sides can also connect an expansion jib in rectangular compound type jib at cross sectional shape.Certainly, the present invention is equally applicable to the compound type jib of other cross sectional shape, as the compound type jib of trapezoid cross section.
In addition, in the present invention's three embodiments, matrix jib 1 is integrated welded type space truss structure, expansion jib 2 is the plane framework group structure of integral type, but in other embodiments, matrix jib also can be knockdown space truss shelf structure, and expansion jib 2 can be also knockdown truss structural, or is integrated welded type or knockdown space truss structure.
Arm support connection device of the present invention has numerous embodiments, is described below for two kinds of embodiments.
As the first embodiment of arm support connection device of the present invention, arm support connection device can comprise the first connecting portion, the second connecting portion and attaching parts, first connecting portion is connected on matrix jib 1, second connecting portion is connected on expansion jib 2, and the first connecting portion and the second connecting portion are removably connected by attaching parts.By attaching parts, the first connecting portion is fixedly connected with the second connecting portion like this, namely can expansion jib 2 be assembled on matrix jib 1, increase the sectional dimension of jib, strengthen the load-carrying capacity of jib, and when needs transport, matrix jib 1 and expansion jib 2 can being transported as two independent parts by removing attaching parts again, meeting the requirement of transportation clearance, thus effectively can solve the problem that jib load-carrying capacity and jib transportation clearance limit this conflict.
Based on the arm support connection device of this first embodiment, the invention provides the first embodiment of the compound type jib as shown in Fig. 3-Fig. 7 and the second embodiment of compound type jib as illustrated in figs. 8-12.
From Fig. 3-7, in the first embodiment of the present invention, compound type jib comprises matrix jib 1, expansion jib 2 and arm support connection device, wherein, arm support connection device comprises as the first connecting portion, second connecting portion and attaching parts, first connecting portion is the slot 31 be connected on matrix jib 1, second connecting portion is the plate 32 that correspondence is connected on expansion jib 2, attaching parts is the first bearing pin 33, plate 32 can insert in slot 31, and correspondence is provided with pin-and-hole on slot 31 and plate 32, first bearing pin 33 can realize removably connecting of slot 31 and plate 32 through pin-and-hole, thus realize matrix jib 1 with expansion the detachable of jib 2 be connected.
Based on this embodiment, when needing the load-carrying capacity increasing jib, plate 32 is inserted in corresponding slot 31, and by the first bearing pin 33, matrix jib 1 and expansion jib 2 are fixed together, increase the section width B (or depth of section H) of matrix jib 1, thus make compound type jib have stronger bending resistance and Anti-pull-press ability; And when needs transport, then the first bearing pin 33 can be disconnected, realize the dismounting of matrix jib 1 and expansion jib 2 easily, thus matrix jib 1 and expansion jib 2 can be transported as two independent parts, to reduce jib shipping height (or reducing jib conveyor width), alleviate jib domestic shipping weight, meet the requirement of jib transportation clearance.Visible, in this embodiment, matrix jib 1 and expansion jib 2 adopt board plug type connection mode to form compound type jib, make the sectional dimension of jib need not be subject to the restriction of the factor such as transportation clearance, domestic shipping weight again, thus significantly can improve the load-carrying capacity of jib, can meet the demand of different actual condition neatly, cost is lower, and technique is simpler.
As shown in Figure 4, in this embodiment, slot 31 is connected on the main chord of matrix jib 1 by the plate that two are parallel to each other and is formed, also namely this slot 31 is two plate slots, accordingly, as shown in Figure 6, in this embodiment, plate 32 is for being connected to the single board plug structure of corresponding position on the main chord of expansion jib 2, and the width of this plate 32 is less than the spacing between two plates of slot 31, to ensure that plate 32 can insert in slot 31 smoothly.Certainly, the board plug type connection mode between matrix jib 1 of the present invention and expansion jib 2 is not limited to the version of this veneer to two plate, and it also can adopt two plate to other versions such as three plates.In addition, as shown in Figure 4, in this embodiment, slot 31 arranges along the depth of section H direction of matrix jib 1, but in fact, slot 31 also can be arranged along the section width B direction of matrix jib 1, and these are all within protection scope of the present invention.
From Fig. 8-12, in the second embodiment of the present invention, matrix jib 1 and expansion jib 2 adopt sleeve-type connection mode to form compound type jib, the difference of itself and the first embodiment is, first connecting portion of arm support connection device is the sleeve 41 be connected on matrix jib 1, second connecting portion of arm support connection device is be connected to the sleeve pipe 42 on expansion jib 1, the attaching parts of arm support connection device is the second bearing pin 43, wherein, the external diameter of sleeve pipe 42 is less than the internal diameter of sleeve 41, thus sleeve pipe 42 can insert in sleeve 41 smoothly, and correspondingly on sleeve 41 and sleeve pipe 42 be provided with the pin-and-hole passed for the second bearing pin 43.
As shown in Figure 8, sleeve pipe 42 is inserted in sleeve 41, and make the second bearing pin 43 through pin-and-hole, then can realize the assembling of matrix jib 1 and expansion jib 2, and as shown in figs. 9-10, second bearing pin 43 is disconnected, then can realize matrix jib 1 and expand being separated of jib 2, so just making the compound type jib of this embodiment can not only increase the sectional dimension of jib easily, strengthening the load-carrying capacity of jib, and transportation clearance restriction can be met, transport easily.
As shown in FIG. 11 and 12, in this second embodiment, sleeve 41 and sleeve pipe 42 adopt hollow circular tube structure, in fact, adopt the sleeve 41 of square tube, rectangular tube or other shape tube structures and sleeve pipe 42 also can realize object of the present invention.
As the second embodiment of arm support connection device of the present invention, arm support connection device can comprise envelope part and lock piece 52, wherein, envelope part has peristome with by the main chord envelope of matrix jib 1 and expansion jib 2 wherein, lock piece 52 is then for closing the peristome of envelope part, coordinating like this by envelope part and lock piece 52, then can realize matrix jib 1 and expand removably connecting of jib 2.
Lock piece 52 can for the separate part be separated with envelope part, and such as it can be a bearing pin, and this bearing pin can realize closing envelope part peristome through the pin-and-hole of envelope part peristome both sides.But in order to the parts reduced because being separated such as easily to lose at the unnecessary trouble that reason causes, lock piece 52 and envelope part can be designed to movable connection structure, such as, the first end of lock piece 52 is connected to the first side of the peristome of envelope part rotationally, second side of the second end of lock piece 52 and the peristome of envelope part removably connects, opening and closing of envelope part peristome can not only be realized so easily, namely the assembly and disassembly of matrix jib 1 and expansion jib 2 are realized easily, and link together with envelope part all the time due to the first end of lock piece 52, therefore can also prevent parts from losing, use more convenient.
Based on the arm support connection device of this second embodiment, the invention provides the 3rd embodiment of compound type jib as shown in figures 13-16.
From Figure 13-16, in the 3rd embodiment, matrix jib 1 and expansion jib 2 adopt U-shaped frame connection mode to form compound type jib.As shown in FIG. 14 and 15, in this embodiment, envelope part is U-shaped frame 51, and it has peristome, first side of this peristome is rotatably connected with the first end of lock piece 52 by the 3rd bearing pin 53, and the second end of lock piece 52 is then provided with the mounting hole adapted with the second side of this peristome.Like this, as shown in figure 14, the second side of U-shaped frame 51 peristome is inserted in the mounting hole of lock piece 52 second end, and by nut 54 or the locking of other fasteners, namely the peristome of U-shaped frame 51 can be closed; And as shown in figure 15, fastener such as loosening nut 54 grade, and around the 3rd bearing pin 53 rotation lock stop member 52, just the peristome of U-shaped frame 51 can be opened.Certainly, the 3rd bearing pin 53 also can replace with other framing members such as bolts.
Based on the compound type jib of this embodiment, as shown in figure 13, U-shaped frame 51 is enclosed within the main chord of matrix jib 1 and the main chord of expansion jib 2, and by fasteners such as lock piece 52 and nuts 54, the peristome of U-shaped frame 51 is closed, just can expansion jib 2 be assembled on matrix jib 1, thus make compound type jib have larger sectional dimension, and then compound type jib is made to have higher bending resistance and Anti-pull-press intensity; And when needs transport, also only need loosening nut 54 fastener such as grade and rotation lock stop member 52, the peristome of U-shaped frame 51 is opened, matrix jib 1 just can be made to be separated with expansion jib 2, transport as two independent parts, meet the restriction of transportation clearance.
In addition, from Figure 14 and Figure 15, in the 3rd embodiment, the side of the peristome of the close envelope part of lock piece 52 is provided with bracket 521, this bracket 521 is for contacting with the main chord of matrix jib 1 when being fitted together with expansion jib 2 by matrix jib 1, form the support to the main chord of matrix jib 1, increase the steadiness of assembling, and improve the force-bearing situation of jib further.And in order to form support better, in this embodiment, the surface contacted with the main chord of matrix jib 1 of this bracket 521 has the arcuate shape adapted with the main chord of matrix jib 1.
It should be noted that, in this embodiment, bracket 521 contacts with the main chord of matrix jib 1, but those skilled in the art are understood that, bracket 521 in fact also can contact with the main chord of expansion jib 2, now the main chord of bracket 521 to expansion jib 2 is formed and supports, and bracket 521 can have the curved surfaces adapted with the main chord of expansion jib 2.
Further, as shown in figure 13, in the 3rd embodiment, arm support connection device also comprises cushion block 55, this cushion block 55 be arranged on matrix jib 1 main chord and expansion jib 2 main chord between with make matrix jib 1 and expansion jib 2 between from a distance, the direct rigid contact between matrix jib 1 and expansion jib 2 can not only be avoided like this, but also effective transmission of power between matrix jib 1 and expansion jib 2 can be ensured.
Arrange more reliably to realize cushion block 55, cushion block 55 can have the surface configuration adapted with the main chord of matrix jib 1 and/or the main chord of expanding jib 2.As shown in figure 16, in the 3rd embodiment, cushion block 55 has the first curved surfaces adapted with the main chord of expansion jib 2, and the second curved surfaces to adapt with the main chord of matrix jib 1, such cushion block 55 can with matrix jib 1 with expand jib 2 and more effectively contact, thus make the structure of compound type jib more reliable.
Visible, compound type jib of the present invention changes assembly type by jib is strengthened mode into by welded type, make the design of jib need not be subject to transportation clearance and transport heavy quantitative limitation again, the load-carrying capacity of jib can significantly improve, unconfinedly can promote in theory, thus make weight-lifting equipment develop into possibility to large.
The foregoing is only exemplary embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a compound type jib, it is characterized in that, comprise matrix jib (1), expansion jib (2) and arm support connection device, described expansion jib (2) is removably connected at least one side of described matrix jib (1) by described arm support connection device.
2. compound type jib according to claim 1, it is characterized in that, described arm support connection device comprises the first connecting portion, the second connecting portion and attaching parts, described first connecting portion is connected on described matrix jib (1), described second connecting portion is connected on described expansion jib (2), and described first connecting portion and described second connecting portion are removably connected by described attaching parts.
3. compound type jib according to claim 2, it is characterized in that, described first connecting portion is slot (31), described second connecting portion is the plate (32) that can insert in described slot (31), described attaching parts is the first bearing pin (33), the upper correspondence of described slot (31) and described plate (32) is provided with pin-and-hole, and described first bearing pin (33) can realize removably connecting of described slot (31) and described plate (32) through described pin-and-hole.
4. compound type jib according to claim 2, it is characterized in that, described first connecting portion is sleeve (41), described second connecting portion is the sleeve pipe (42) that can insert in described sleeve (41), described attaching parts is the second bearing pin (43), the upper correspondence of described sleeve (41) and described sleeve pipe (42) is provided with pin-and-hole, and described second bearing pin (43) can realize removably connecting of described sleeve (41) and described sleeve pipe (42) through described pin-and-hole.
5. compound type jib according to claim 1, it is characterized in that, described arm support connection device comprises envelope part and lock piece (52), described envelope part has peristome with by the main chord envelope of the main chord of described matrix jib (1) and described expansion jib (2) wherein, and described lock piece (52) is for closing the peristome of described envelope part.
6. compound type jib according to claim 5, it is characterized in that, the first end of described lock piece (52) is connected to the first side of the peristome of described envelope part rotationally, and the second side of the second end of described lock piece (52) and the peristome of described envelope part removably connects.
7. compound type jib according to claim 6, is characterized in that, the first end of described lock piece (52) is connected to the first side of the peristome of described envelope part rotationally by the 3rd bearing pin (53) or bolt.
8. compound type jib according to claim 6, is characterized in that, the second end of described lock piece (52) is provided with mounting hole, and also fastener locking in described mounting hole can be inserted in the second side of the peristome of described envelope part.
9. compound type jib according to claim 5, it is characterized in that, the side of the peristome of the close described envelope part of described lock piece (52) is provided with bracket (521), when the peristome of described envelope part is closed by described lock piece (52), the main chord of described matrix jib (1) or the main chord of described expansion jib (2) contact with described bracket (521).
10. compound type jib according to claim 9, it is characterized in that, the main chord of described matrix jib (1) contacts with described bracket (521), and the surface contacted with the main chord of described matrix jib (1) of described bracket (521) has the shape adapted with described matrix jib (1); Or, the main chord of described expansion jib (2) contacts with described bracket (521), and the surface contacted with the main chord of described expansion jib (2) of described bracket (521) has the shape adapted with the main chord of described expansion jib (2).
11. compound type jibs according to claim 5, it is characterized in that, described arm support connection device also comprises cushion block (55), and described cushion block (55) is arranged between the main chord of described matrix jib (1) and the main chord of described expansion jib (2) to make between described matrix jib (1) and described expansion jib (2) from a distance.
12. compound type jibs according to claim 11, is characterized in that, described cushion block (55) has the first surface adapted with the main chord of described expansion jib (2); And/or described cushion block (55) has the second surface adapted with the main chord of described matrix jib (1).
13. according to the arbitrary described compound type jib of claim 5-12, and it is characterized in that, described envelope part is U-shaped frame (51).
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| CN201510902584.6A CN105347207B (en) | 2015-12-09 | 2015-12-09 | A kind of combined type arm support |
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| CN201510902584.6A CN105347207B (en) | 2015-12-09 | 2015-12-09 | A kind of combined type arm support |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108313895A (en) * | 2018-03-29 | 2018-07-24 | 徐工集团工程机械股份有限公司 | A kind of reinforced combined type arm support |
| CN109305627A (en) * | 2018-11-08 | 2019-02-05 | 河南省盛华重型起重机有限公司 | A kind of movably connected web member girder for crane |
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| CN104150378A (en) * | 2014-06-27 | 2014-11-19 | 浙江三一装备有限公司 | Truss arm structure and engineering machine |
| CN205419602U (en) * | 2015-12-09 | 2016-08-03 | 徐工集团工程机械股份有限公司 | Modular cantilever crane |
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| CN102259800A (en) * | 2010-04-06 | 2011-11-30 | 利勃海尔爱茵根有限公司 | Lattice boom mast crane and lattice boom mast suspender, has side parts arranged at articulation part, and zone at two or multiple branches and directly or indirectly arranged at articulation part and/or directly or indirectly to side parts |
| CN102381640A (en) * | 2011-10-28 | 2012-03-21 | 中联重科股份有限公司 | Detachable truss arm structure and truss arm type crane |
| CN103663190A (en) * | 2013-12-13 | 2014-03-26 | 浙江三一装备有限公司 | Cantilever crane and crane |
| CN104150378A (en) * | 2014-06-27 | 2014-11-19 | 浙江三一装备有限公司 | Truss arm structure and engineering machine |
| CN205419602U (en) * | 2015-12-09 | 2016-08-03 | 徐工集团工程机械股份有限公司 | Modular cantilever crane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108313895A (en) * | 2018-03-29 | 2018-07-24 | 徐工集团工程机械股份有限公司 | A kind of reinforced combined type arm support |
| CN109305627A (en) * | 2018-11-08 | 2019-02-05 | 河南省盛华重型起重机有限公司 | A kind of movably connected web member girder for crane |
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| Publication number | Publication date |
|---|---|
| CN105347207B (en) | 2017-05-31 |
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