CN101827774A - Profile shape for a crane jib - Google Patents

Profile shape for a crane jib Download PDF

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Publication number
CN101827774A
CN101827774A CN200880112138A CN200880112138A CN101827774A CN 101827774 A CN101827774 A CN 101827774A CN 200880112138 A CN200880112138 A CN 200880112138A CN 200880112138 A CN200880112138 A CN 200880112138A CN 101827774 A CN101827774 A CN 101827774A
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China
Prior art keywords
crane jib
jib
intersection point
diad
point
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CN200880112138A
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Chinese (zh)
Inventor
E·温默
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Palfinger AG
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Palfinger AG
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Publication of CN101827774A publication Critical patent/CN101827774A/en
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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
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

The invention relates to a crane jib for a crane, having a longitudinal axis and an imaginary contour line that extends in a transversal plane relative to an axis of symmetry (s) in an at least approximately mirror-symmetric manner, the contour line intersecting the axis of symmetry (s) in a first and a second point of intersection (S1, S2) and the contour line having a straight section the imaginary extension of which in the direction of the second point of intersection (S2) intersects the axis of symmetry (s) and forms an acute angle therewith. The centroid (F) of the surface enclosed by the contour line in the transversal plane lies between the first point of intersection (S1) and a center (M) that is equally interspaced from the first and second point of intersection (S1, S2) on the axis of symmetry (s).

Description

The section form of crane jib
Technical field
The present invention relates to a kind of crane jib that is used for hoisting crane, comprise longitudinal axis and in Transverse plane about the diad imaginary outline line that extends symmetrically of proximate mirror at least, this outline line intersects with diad on first and second intersection points, and this outline line has linear portion, the imaginary prolongation of this linear portion intersects towards the direction and the diad of second intersection point, and forms an acute angle with this diad.
Background technology
Such crane jib is for example shown in Figure 13 of EP 583 552 B1.
Described crane jib has big relatively version in practice, thereby and is subjected to strong restrictions on its usability.For example it is not suitable for the category of toter.
Summary of the invention
The objective of the invention is, develop a kind of improved crane jib.
Described purpose solves by a kind of crane jib that has the feature of claim 1.
Actual crane jib is certainly owing to the material thickness of the member that constitutes this crane jib not only has outline but also has interior profile." imaginary outline line " relates to the outline of crane jib.
" face center of gravity " is interpreted as the center of gravity (face of representing with long and short dash line) in the whole zone that is surrounded by imaginary outline line in Fig. 1 h by the meaning of disclosure file.Therefore term " face center of gravity " should not be construed as and relate to the face that surrounds between outline and interior profile.
Select imaginary outline line trend so that the face center of gravity in the zone that surrounds by imaginary outline line between first intersection point and mid point, the effect of playing is, is freely in a big relatively material thickness scope when the thickness of slab of the crane jib of selecting to be surrounded by imaginary outline line.Be different from prior art (for example EP 583 552B1), the zero crossing on the diad (being present in that position that pulling force in the upper area of crane jib carries out the transition to the pressure in the lower area that is present in crane jib) is not by selecting thickness of slab but regulates by walking always of imaginary outline line.Zero crossing can be moved on in the lower area of crane jib by the present invention when both having made the thickness of slab of all sections identical.
Other favourable embodiments provide in the dependent claims.
The present invention relates to a kind of jib system that is used for hoisting crane in addition, wherein at least one cantilever and/or a cantilever prolongation constitute by the described crane jib of one of claim 1 to 26.Preferably be provided with one to 20 preferred five to ten cantilever prolongations.Particularly preferably be the cantilever prolongation that is provided with more than five.
The present invention relates to a kind of hoisting crane, especially toter that has by the jib system of the crane jib of one of above-mentioned embodiment or the above-mentioned type in addition, and relate to a kind of commercial vehicle/comm..vehicle of equipping such hoisting crane.
Description of drawings
Other advantages of the present invention and details provide by means of accompanying drawing and follow-up explanation, wherein:
Fig. 1 a is by first embodiment of the imaginary outline line of crane jib of the present invention;
Structure of the outline line of Fig. 1 b, a 1c embodiment (Fig. 1 b) and corresponding steel plate structure (Fig. 1 c), wherein circular arc section k1 is similar to by the polygon lead;
Fig. 1 d has the jib system by three cantilever prolongations of Fig. 1 b;
Fig. 1 e presses the crane jib of Fig. 1 a to 1c, the position of the face center of gravity of wherein drawing;
Fig. 1 f has the jib system of a cantilever prolongation, the layout of supporting member shown in it;
Fig. 1 g has the jib system of a cantilever prolongation, and wherein the circular arc section is similar to by different polygons in cantilever and cantilever prolongation;
Fig. 1 h presses the crane jib of Fig. 1 a to 1c and 1e, represents all embodiment, and that face that the face center of gravity relates to draws with long and short dash line;
Fig. 2 is by second embodiment of the imaginary outline line of crane jib of the present invention;
Fig. 3 is by the 3rd embodiment of the outline line of crane jib of the present invention;
Fig. 4 presses the transparent view of the jib system of Fig. 1 d;
Fig. 5 has the commercial vehicle/comm..vehicle by hoisting crane of the present invention.
The specific embodiment
Should point out earlier, institute's drawings attached the length that each contour segment is shown with correct relatively relation and shown in be to meet ratiometric in the scope of angle.All angle explanations all relate to the number of degrees, make full angle equal 360 °.Acute angle is interpreted as the angle less than 1/4 full angle.The obtuse angle is interpreted as greater than 1/4 and less than the angle of 1/2 full angle.The angle that equals 1/4 full angle is called the right angle.
Fig. 1 a is illustrated in first embodiment of the imaginary outline line curve of the crane jib in the Transverse plane of crane jib.Transverse plane is interpreted as a plane at this, and this plane is passed by the longitudinal axis quadrature of crane jib.All have a diad s who is arranged in the Transverse plane by crane jib of the present invention, the outline line of crane jib about this diad in Transverse plane at least proximate mirror extend symmetrically.For following situation, promptly crane jib has identical shape of cross section on most of or its whole longitudinal extension length, and described diad s is a Transverse plane and intersection along the symmetrical plane (midplane) of vertical axis extension.Outline line is in first and second point of intersection S in all embodiments 1, S 2Last and diad intersects.On diad s with first and second point of intersection S 1, S 2The mid point M of She Zhiing is illustrated in the high position of crane jib in the Transverse plane half equidistantly.With mid point M is that departure point is towards point of intersection S 2Direction, people are positioned at the following zone of crane jib, this zone the time mainly is subjected to drag load in work.Crane jib is in the mid point M and first point of intersection S 1Between the zone in the work load that the time is under pressure basically.
The curve shown in Figure 1 of the outline line of crane jib has four mutual differentiable section k 1, g 1, g 2, g 3
Section k in the zone that is subjected to maximum pressure load at work is set 1Constitute circular arc, as known per se, this moment, this shape of cross section had the compression effort that reduces and the flexing danger of reduction.Enough is, described in some sense section is the approximate circle arc at least, and for example it can be similar to by polygon, as shown in Fig. 1 b and the 1c.Circular arc section k 1Be similar to by the polygon lead and allow more simply the crimp of the steel plate by constituting crane jib to make.But the structure of circular arc certainly realizes by means of the operation of rolling.
Circular arc section k 1Also can be the approximate circle arc in some sense, for example it can constitute by one or more oval sections that have corresponding little eccentricity.By straight line, the segmentation formation circular arc section k oval and/or circular arc that connects corresponding weak point successively 1Also can imagine.
As shown in FIG. 1, particularly advantageously be circular arc section k 1Constitute the quadrntnt arc, that is to say on about 90 ° angle and extend.Therefore can be with circular arc section k 1Form constitute outline line in first point of intersection S 1And the most curve between the mid point M.Scheme shown in Figure 1 is particularly preferred, wherein circular arc section k 1Center of curvature K on diad s or in its vicinity, and circular arc section k 1Center of curvature K in first point of intersection S 1And between the mid point M.Be different from situation shown in Figure 1, circular arc section k 1Can extend to first point of intersection S 1 fully, in this case in point of intersection S always 1Constitute circular arc section k with the interior whole profile line in the zone of a M 1
Yet embodiment shown in Figure 1 is particularly preferred, wherein the 3rd linear portion g 3Towards first point of intersection S 1Direction and circular arc section k 1Connect, this linear portion and diad s form the angle γ less than 90 ° tangently.(approximating 72 ° greatly) at this angle γ.Therefore produce the good weldability of crane jib, the possibility that produces the better clamping property that is used to weld of the section of meeting and produce the longitudinal seam of implementing not have additional seamed edge preparation by inclination.Produce technology failure-free embodiment in a word.
This angle is preferably less than 80 °.Preferred angle γ is greater than 70 °.
Among the embodiment shown in Figure 1, circular arc section k 1Center of curvature K directly in the mid point M and first point of intersection S 1Between diad s on.Situation shown in being different from, center of curvature K also can be provided with diad s slightly with staggering.Yet it should be all the time in the mid point M and first point of intersection S 1Between the zone in.
At circular arc section k 1Go up towards second point of intersection S 2Direction, the first linear portion g 1Be connected with the auxiliary circle shown in the 1b at Fig. 1 a tangently, this linear portion is in the mid point M and second point of intersection S 2Between the major part of profilograph on extend.Linear structure by described length in the upper area of crane jib and consequent cross-sectional plane convergent constitute a zone, and this zone is suitable for bearing at the pulling force of this appearance than prior art and the supporting power when being arranged in the jib system better.Linear portion g 1Imaginary prolongation g 1' (seeing Fig. 1 b) forms acute angles beta with diad s, and this acute angle approximates 18 ° in the embodiment shown greatly.Fully generally speaking, acute angles beta also can be in being preferably greater than 15 ° scope greater than 10 °.In this preferred corresponding upper limit is 25 °, so that prevent linear portion g 1Too flatly extend.
In pressing the embodiment of Fig. 1, the second linear portion g 2Be directly connected to the first linear portion g 1On, this second linear portion extends on the diad s always, and in second point of intersection S 2Last and this diad intersects.Especially as seen, be to be different from shown in Fig. 1 a the second linear portion g owing to what the reason probable value of manufacturing technology aspect must be pursued as in Fig. 1 c 2Not directly but preferably be configured the crooked section and the first linear portion g by another 1Connect.
Among the embodiment shown in Figure 1, the second linear portion g 2Form angle α with diad s, this angle is less than 90 ° (angle α approximates 65 ° greatly in the embodiment in figure 1).The scope that particularly preferably is angle α is less than 70 °.Yet angle α in the present embodiment should be greater than 60 °.
In pressing another embodiment of Fig. 2, second linear portion and diad s form the right angle.
The second linear portion g 2Bring advantage, favourable local power is imported becomes possibility, and for example power imports when the slide assemblies that supports between each cantilever prolongation and realizes.By the short length of side
Figure GPA00001103846500051
Produce the favourable ratio between the steel plate thickness and the length of side, so that prevent that crane jib is in the upper area internal strain.
Yet basically also can be in this zone with the second circular arc section k 2Form constitute the profilograph (see figure 3).But this only illustrates a kind of concrete scheme of general design (being that outline line terminates in the slick and sly portion on the diad s).Constitute circular arc section k shown in the replacement 2Slick and sly portion (Rundung), slick and sly portion for example also can constitute crimp (Kantung) 7.
Imaginary outline line does not have circular arc section k in the embodiment by Fig. 2 1, but have only linear portion g 1, g 2, g 3, g 4
Be that the face center of gravity F of the face that is surrounded in Transverse plane by outline line is in the mid point M and first point of intersection S by the embodiment mandatory declaration of hoisting crane of the present invention fully generally for all 1Between the zone in, just below half height of crane jib.Therefore the cross-section center point (Querschnittskonzentration) of crane jib in moving down into the pressure span, produces less compression effort deal as far as possible thus.
As by accompanying drawing as seen, the outline line of all embodiment is in first point of intersection S 1With second point of intersection S 2Between have the extreme point E that separates maximum spacing e with diad s.First and second point of intersection S 1, S 2Between distance D can be the twice of spacing e at least at this.Preferred distance D is 2.5 times of spacing e at least, especially preferably 2.75 times of spacing e.Distance D can be corresponding less than three times of spacing e.
Can stipulate, outline line to diad s apart from d with second point of intersection S 2For departure point in about first and second point of intersection S 1, S 2Between 1/4th places of distance D smaller or equal to 0.8 times of maximum spacing e.
Among the embodiment shown in Figure 1, in the mid point M and first point of intersection S 1Between extreme point E greatly on the height of center of curvature K.In the curve shown in Fig. 1 a, outline line only has a unique extreme point E, just not only towards first point of intersection S 1Direction and also towards second point of intersection S 2Direction be that the width of departure point crane jib reduces with extreme point E.Passing through polygon lead approximate circle segmental arc k 1The time, as shown in Fig. 1 c, a polygon section have a few and have described maximum spacing e certainly, by described polygon section approximate circle segmental arc k in the zone of extreme point E 1
Being that the auxiliary circle of r is a departure point at the radius shown in Fig. 1 a, have section width b by the embodiment of Fig. 1 by b ≈ 2r, press the section height D of D ≈ 3r and press b 1The last section width b of ≈ r 1Fully generally can in by crane jib of the present invention, can stipulate these particularly advantageous sizes.
For the embodiment of Fig. 1, Fig. 1 e is illustrated in diad s and goes up in the mid point M and first point of intersection S 1Between the position of face center of gravity F.Face center of gravity F relates in Fig. 1 h with the face shown in the long and short dash line at this, and promptly on whole, this face is surrounded by imaginary outline line (corresponding to outline).
At the jib system 5 that has a cantilever prolongation shown in Fig. 1 f, wherein additionally the supporting in cantilever illustrates by supporting member 2 by supporting member 1 and cantilever prolongation in the supporting of jib system 5.Shown embodiment certainly about shown in the quantity of cantilever prolongation be exemplary fully.Identical supporting member can be applied in the jib system 5 that has any a plurality of cantilever prolongations.
At two crane jibs shown in the embodiment that presses Fig. 1 g, wherein for example relate to a cantilever prolongation that is arranged in the cantilever.Meaningfully, circular arc section k 1By different polygonal approximations.Have less crimp at in-to-in cross-sectional plane section in the zone of circular arc section, this may be favourable at manufacture view when little section especially.
Manufacturing for example can realize in the following way that by crane jib of the present invention promptly crane jib is made of two shells, the ground moulding of the mutual mirror image of described shell, and the corresponding corresponding embodiment of one of shell.Two shells are in first point of intersection S 1With second point of intersection S 2The zone in be connected to each other, for example mutually the welding.
Yet stipulate that particularly advantageously crane jib is made by a unique block plate along the part of its longitudinal extension length at least, this steel plate is suitable for moulding, and and then along a unique line sealing (for example welding).Described line for example can be in first point of intersection S 1Or second point of intersection S 2The zone in extend.
The moulding of steel plate can be in known manner or by crimp and/or rolling and for example welding realize.
When different wall thickness when being essential, outline preferably should remain unchanged, and plate thickness should inwardly be realized.
Fig. 4 exemplarily illustrates and has a jib system 5 that is arranged on the cantilever prolongation in the cantilever.
Commercial vehicle/comm..vehicle 3 exemplarily is shown in Fig. 5, on this commercial vehicle/comm..vehicle, is provided with by hoisting crane 4 of the present invention.Hoisting crane 4 has by jib system 5 of the present invention, and wherein each cantilever prolongation can be relative to telescopically moving by promoting cylinder 6.Telescopic movability can certainly guarantee by other transmission device.Unshowned loading vehicle body for example can be set in the zone, behind of commercial vehicle/comm..vehicle 3.

Claims (32)

1. the crane jib of hoisting crane, comprise longitudinal axis and in Transverse plane about the diad imaginary outline line that extends symmetrically of proximate mirror at least, this outline line intersects with diad on first and second intersection points, and this outline line has linear portion, the imaginary prolongation of this linear portion is towards the direction of second intersection point and diad intersects and form an acute angle with this diad, it is characterized in that: the face center of gravity (F) of the face that is surrounded in Transverse plane by outline line is at the first intersection point (S 1) and mid point (M) between the zone in, described mid point is gone up and the first and second intersection point (S at diad (s) 1, S 2) be provided with equidistantly.
2. crane jib according to claim 1 is characterized in that: described acute angle (β) is greater than 10 °.
3. crane jib according to claim 2 is characterized in that: described acute angle (β) is greater than 15 °.
4. according to the described crane jib of one of claim 1 to 3, it is characterized in that: described acute angle (β) is less than 25 °.
5. according to the described crane jib of one of claim 1 to 4, it is characterized in that: outline line is at the first intersection point (S 1) and mid point (M) between have the section (k of approximate circle arc at least to small part 1).
6. crane jib according to claim 5 is characterized in that: circular arc section (k 1) constitute the quadrntnt arc.
7. according to claim 5 or 6 described crane jibs, it is characterized in that: circular arc section (k 1) center of curvature (K) near the diad (s) or on diad (s).
8. according to the described crane jib of one of claim 5 to 7, it is characterized in that: circular arc section (k 1) center of curvature (K) at the first intersection point (S 1) and mid point (M) between.
9. according to the described crane jib of one of claim 5 to 8, it is characterized in that: described linear portion (g 1) constitute circular arc section (k 1) the tangential extendible portion.
10. according to the described crane jib of one of claim 1 to 9, it is characterized in that: outline line is from the second intersection point (S 2) beginning and have the second linear portion (g away from diad (s) 2).
11. crane jib according to claim 10 is characterized in that: the second linear portion (g 2) form the right angle with diad (s).
12. crane jib according to claim 10 is characterized in that: the second linear portion (g 2) form angle (α) with diad (s) less than 90 °.
13., it is characterized in that: the second linear portion (g according to the described crane jib of one of claim 10 to 12 2) the direct and first linear portion (g 1) connect.
14., it is characterized in that: the second linear portion (g according to the described crane jib of one of claim 10 to 12 2) by at least one is other-preferably constitute crooked-section and the first linear portion (g 1) connect.
15. according to the described crane jib of one of claim 1 to 14, it is characterized in that: outline line is at the first intersection point (S 1) and the second intersection point (S 2) between have with diad (s) and separate the extreme point (E) of maximum spacing (e).
16. crane jib according to claim 15 is characterized in that: first and second intersection point (S 1, S 2) between distance (d) equal the twice of extreme point (E) at least to the maximum spacing (e) of diad (s).
17., it is characterized in that according to claim 14 or 15 described crane jibs: outline line to the distance (d) of diad (s) with the second intersection point (S 2) be that departure point is at first and second intersection point (S 1, S 2) between about 1/4th places of distance (D) smaller or equal to 0.8 times of maximum spacing (e).
18. according to the described crane jib of one of claim 15 to 17, it is characterized in that: extreme point (E) is positioned at the first intersection point (S 1) and mid point (M) between.
19., it is characterized in that: the 3rd linear portion (g according to the described crane jib of one of claim 5 to 18 3) towards the first intersection point (S 1) direction and circular arc section (k 1) connect, the 3rd linear portion and diad (s) form the angle (γ) less than 90 °. tangently
20., it is characterized in that: circular arc section (k according to the described crane jib of one of claim 1 to 19 1) be similar to by polygon.
21. according to the described crane jib of one of claim 1 to 20, it is characterized in that: crane jib has identical shape of cross section at least on the major part of its longitudinal extension length.
22. according to the described crane jib of one of claim 1 to 21, it is characterized in that: outline line is towards the second intersection point (S 2) direction at least at first and second intersection point (S 1, S 2) between distance (D) last 1/3rd before convergent.
23. crane jib according to claim 22 is characterized in that: the convergent of outline line proceeds to the second intersection point (S always 2), and terminate in the slick and sly portion on the symmetric line (s).
24. according to the described crane jib of one of claim 1 to 23, it is characterized in that: crane jib is made by at least one block plate, and all section (k of crane jib 1, k 2, g 1, g 2, g 3, g 4) thickness of slab substantially the same at least size in Transverse plane.
25. according to the described crane jib of one of claim 1 to 24, it is characterized in that: crane jib is made of two shells, the ground moulding of the mutual mirror image of described shell, and be connected to each other, preferably at the first intersection point (S 1) and the second intersection point (S 2) the zone in be connected to each other.
26. according to the described crane jib of one of claim 1 to 24, it is characterized in that: crane jib is made by a unique steel plate along the part of its longitudinal extension length at least, this steel plate is along a unique line sealing, and this unique line is preferably at the first intersection point (S 1) or the second intersection point (S 2) the zone in extend.
27. be used for the jib system of hoisting crane, it is characterized in that: have at least a cantilever and/or a cantilever prolongation to constitute by the described crane jib of one of claim 1 to 26.
28. jib system according to claim 27 is characterized in that: be provided with between one to 20, the cantilever prolongation between preferred five to ten.
29. jib system according to claim 27 is characterized in that: be provided with cantilever prolongation more than five.
30. according to the described jib system of one of claim 27 to 29, it is characterized in that: the shape of the shape of the outline line of cantilever and the outline line of all cantilever prolongations is identical, selectively except passing through the degree of polygonal approximation circular arc.
31. hoisting crane, especially toter is characterized in that: have by the described crane jib of one of claim 1 to 26 or by the described jib system of one of claim 27 to 30 (5).
32. have the commercial vehicle/comm..vehicle (3) of hoisting crane according to claim 31 (4).
CN200880112138A 2007-09-05 2008-08-29 Profile shape for a crane jib Pending CN101827774A (en)

Applications Claiming Priority (3)

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AT5272007 2007-09-05
ATGM527/2007 2007-09-05
PCT/AT2008/000307 WO2009029965A1 (en) 2007-09-05 2008-08-29 Profile shape for a crane jib

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CN (1) CN101827774A (en)
BR (1) BRPI0816410A2 (en)
CA (1) CA2697299A1 (en)
MX (1) MX2010002599A (en)
RU (1) RU2497745C2 (en)
WO (1) WO2009029965A1 (en)

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US8764350B2 (en) 2008-06-05 2014-07-01 Alstom Technology Ltd Conveyor for transporting powder, and a method for conveying powder
FI126628B (en) 2013-04-11 2017-03-15 Bronto Skylift Oy Ab Boom and elevator

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DE2317595A1 (en) * 1973-04-07 1974-10-31 Kaspar Klaus TELESCOPIC UNIT, IN PARTICULAR FOR LIFTING EQUIPMENT
DE3015599A1 (en) * 1980-04-23 1981-10-29 Peter Dipl.-Ing. Dr. 4000 Düsseldorf Eiler Telescopic jib for mobile crane - has hollow triangular aluminium sections reinforced by steel inserts in contact with rollers
SU1100221A1 (en) * 1982-12-16 1984-06-30 Марийский Ордена Дружбы Народов Политехнический Институт Им.А.М.Горького Telescopic boom of load-handling machine
SU1677012A1 (en) * 1989-04-03 1991-09-15 Соломбальский машиностроительный завод Telescopic boom of load-hoisting mechanism
JPH03100280U (en) * 1990-01-29 1991-10-21
DE9210902U1 (en) 1992-08-14 1992-12-24 Liebherr-Werk Ehingen Gmbh, 7930 Ehingen Telescopic boom for mobile cranes or similar
ES2670924T3 (en) * 2001-10-16 2018-06-04 Effer S.P.A. Heavy Duty Telescopic Arm

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MX2010002599A (en) 2010-03-31
RU2010112864A (en) 2011-10-10
WO2009029965A1 (en) 2009-03-12
EP2185460A1 (en) 2010-05-19
BRPI0816410A2 (en) 2015-03-03
CA2697299A1 (en) 2009-03-12
RU2497745C2 (en) 2013-11-10

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Application publication date: 20100908