EP2504267A1 - Mobil-teleskopkran - Google Patents
Mobil-teleskopkranInfo
- Publication number
- EP2504267A1 EP2504267A1 EP11797251A EP11797251A EP2504267A1 EP 2504267 A1 EP2504267 A1 EP 2504267A1 EP 11797251 A EP11797251 A EP 11797251A EP 11797251 A EP11797251 A EP 11797251A EP 2504267 A1 EP2504267 A1 EP 2504267A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boom
- sub
- telescopic crane
- mobile telescopic
- crane according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 43
- 239000000463 material Substances 0.000 description 8
- 238000005457 optimization Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 230000004584 weight gain Effects 0.000 description 1
- 235000019786 weight gain Nutrition 0.000 description 1
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
- B66C23/64—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
-
- 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
- B66C23/18—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 specially adapted for use in particular purposes
- B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
-
- 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
- B66C23/18—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 specially adapted for use in particular purposes
- B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
- B66C23/42—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes with jibs of adjustable configuration, e.g. foldable
-
- 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
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
-
- 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
- B66C23/707—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic guiding devices for telescopic jibs
-
- 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
- B66C23/708—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic locking devices for telescopic jibs
Definitions
- the invention relates to a mobile telescopic crane according to the preamble of claim 1.
- a mobile telescopic crane which has two bracing supports arranged on the boom and inclined to the seesaw plane.
- the guy supports are connected to increase the carrying capacity of the mobile telescopic crane via guy ropes with the free end of the boom and the superstructure.
- laterally acting on the boom loads that can represent the traglastbesky criterion in an operating position of the boom can be better absorbed.
- a disadvantage of this mobile telescopic crane that the guy supports represent a significant additional weight. The guy supports must therefore be transported separately to the construction site on a truck and mounted there on the boom. This is associated with a considerable cost and time.
- a material handling machine which has a mobile machine frame and a pivotally mounted thereto and telescopic boom.
- the boom is constructed of a plurality of boom sections, wherein a receiving fork for a load to be moved is disposed on the outermost boom section.
- the boom sections are telescopically designed so that the boom is extendable and retractable to move the take-up fork with the load thereon toward and away from the machine frame.
- at least one boom section is made of a composite material.
- the outermost boom section is constructed, for example, of three partial boom sections of composite material.
- the invention has for its object to provide a mobile telescopic crane, which allows a simple way to increase the load.
- a mobile telescopic crane with the features of claim 1.
- the area moment of inertia of the boom is significantly increased.
- the area moment of inertia which is a measure of the bending stiffness, results, according to Steiner's theorem, from the own shares of the sub-cantilevers and their Steiner shares.
- the boom is extremely rigid, so that the cross-sectional area remains substantially flat under load of the boom, whereby the Steiner shares in the calculation of the area moment of inertia substantially their theoretical values, if necessary reduced by reduction factors.
- a high rigidity is achieved by the mechanical locking of each adjacent boom sections, since the built-up of the sub-boom sections sub-arms are extremely rigid by the lock.
- adjacent sub-boom sections of each sub-boom are mechanically locked to each other.
- the locking takes place for example by means of locking bolts, which are hydraulically, pneumatically or electromechanically actuated.
- the locking can be done by means of a bayonet-type locking mechanism. Due to the at least three partial boom high rigidity of the boom is ensured both opposite to perpendicular to the rocker plane and acting in the rocker bending forces.
- the boom has exactly three sub-arms, these can be arranged in triangular form, wherein the stiffness can be adjusted over the width and height of the boom relative to the rocker plane perpendicular to the rocker plane and bending forces acting in the rocker plane.
- the boom has at least four, in particular exactly four sub-arms.
- the boom according to the invention can be dimensioned completely different from conventional booms, so that in comparison to a conventional boom with guy supports a corresponding increase in the load can be achieved with a lower additional weight.
- the boom By constructing the sub-arms from sub-boom sections which can be telescoped in the longitudinal direction, the boom can be brought into an operating position from a transport position with little effort. Due to the lower additional weight of the inventive mobile telescopic crane - drive within a certain load class - with the full boom on public roads to the site, so that in contrast to a boom with guy supports no separate transport and no complex installation is required.
- the inventive mobile telescopic crane thus enables a simple way to increase the load.
- the boom according to the invention can be dimensioned such that in comparison with a conventional boom with guy supports again a significant increase in the load can be achieved is.
- the boom according to the invention also has a considerable weight, so that the mobile telescopic crane with the boom according to the invention may no longer be able to participate fully in public traffic. Individual sub-boom or a group of sub-arms or the entire boom must then be transported separately to the site and mounted there.
- the advantage is thus in the increase of the load.
- the boom according to the invention can be optimized in terms of its bending stiffness perpendicular to and / or parallel to the rocker plane and / or in terms of weight.
- the boom according to the invention can be optimized with regard to its weight and / or with regard to its bending stiffness or load capacity.
- the mobile telescopic crane according to the invention preferably has a boom with at least three, in particular at least four, and in particular at least five jib sections or respective partial jib sections.
- a mobile telescopic crane according to claim 2 ensures a high rigidity of the boom against bending loads.
- the respective partial cross-sectional area comprises the material cross-sectional area as well as the cavity cross-sectional area delimited by the material of the sub-arm.
- a mobile telescopic crane according to claim 3 has an increased rigidity against bending forces acting perpendicular to the rocker plane.
- the Width B A is a maximum width of the boom or of the respective boom section.
- a mobile telescopic crane according to claim 4 has an increased rigidity against bending forces acting in the rocker plane.
- the height H A is a maximum height of the boom or the respective boom section.
- a mobile telescopic crane according to claim 5 ensures the same stiffness behavior of the boom in the positive and negative lateral direction.
- a mobile telescopic crane according to claim 6 allows an optimization of the rigidity of the boom in relation to its weight.
- a mobile telescopic crane according to claim 7 ensures a compact transport position of the boom.
- the possible change in the height of the boom if necessary, ensures, in particular, that the mobile telescopic crane does not exceed a maximum permissible height when driving.
- the at least three partial arms can be linearly displaceable or pivotable relative to one another.
- the sub-arms are fixed to each other in a displaced operating position. This is done in particular by means of mechanical locking units.
- the mechanical locking units are arranged, for example, on the connecting elements.
- a mobile telescopic crane according to claim 8 ensures a Teleskopier- availability of the sub-boom. Because sub-boom sections which are adjacent to one another in the longitudinal direction can each be telescoped into one another or are guided in a telescopic manner, a telescopic ability of the boom sections in conjunction with a high rigidity of the boom is achieved in a simple manner.
- a mobile telescopic crane according to claim 9 is simple. For example, the partial boom sections have a circular cross section.
- a mobile telescopic crane according to claim 10 ensures a high rigidity of the cantilever, so that the cross-sectional area remains flat under load of the cantilever and the Steiner portions can be estimated approximately at their theoretical values in the calculation of the area moment of inertia.
- a mobile telescopic crane according to claim 11 enables in a simple manner a mechanical locking of adjacent sub-boom sections.
- the respective locking bolt is hydraulically, pneumatically or electromechanically actuated, for example.
- all adjacent partial boom sections of each partial boom are mechanically lockable to one another by means of at least one locking bolt.
- the partial boom arranged in the rocker plane can preferably be mechanically locked from the inside to the outside, whereas the partial arms arranged at a distance from the rocker plane can preferably be mechanically locked from outside to inside.
- adjacent sub-boom sections of spaced to the rocker plane arranged sub-boom of at least one locking bolt initially guided by the outer part boom section and then by the inner part boom section.
- a mobile telescopic crane according to claim 12 allows rapid mechanical locking of adjacent sub-boom sections.
- Each locking bolt must be guided only by two associated locking holes of the adjacent sub-boom sections to lock them mechanically to each other.
- the distance to be traversed for locking the respective locking bolt is low.
- the respective locking bolt only has to be guided by two associated locking bores, a comparatively low accuracy in the alignment of the respective locking bolt is required.
- exactly two locking bolts are provided, which are arranged opposite to each other and can be actuated in opposite directions.
- a mobile telescopic crane according to claim 13 ensures a high rigidity with respect to bending forces acting perpendicular to the seesaw plane. If the at least two sub-arms with the greatest distance to the rocker plane were to be arranged on an underside of the boom facing the undercarriage, so that the width of the boom would decrease from its underside to its upper side, then the at least two lower sub-arms Both due to acting in the rocker bending forces and due to acting perpendicular to the rocker bending forces are charged to pressure. Such a structure of the boom would be due to the double pressure load according to the Euler kinks to an undesirable load limitation of the boom or the mobile telescopic crane.
- the at least two sub-arms are arranged with the greatest distance to the rocker plane on the upper side of the boom facing away from the undercarriage, so that bending forces acting in the rocker plane essentially lead to a tensile load of the at least two upper part booms, whereas perpendicular to the rocker plane acting bending forces lead to a pressure load of the upper part boom.
- the pressure load on the furthest to the rocker plane spaced sub-arm can thus be significantly reduced.
- the area moment of inertia is thus increased on the one hand in accordance with the invention, but on the other hand avoided a double pressure load.
- the width of the boom can be dimensioned at the top in wide areas as needed.
- a lower sub-boom facing the undercarriage is arranged in the rocker plane and two the sub-carriage facing away, upper sub-boom spaced from the rocker plane, so that the width of the boom from the lower sub-boom or the underside of the upper part of the cantilevers and the top increases.
- the boom has exactly four boom sections, these are trapezoidally arranged so that the width of the boom increases from two lower boom sections facing the undercarriage to two upper boom sections facing away from the undercarriage.
- a mobile telescopic crane according to claim 14 has a relatively stiff and simple construction boom.
- a mobile telescopic crane according to claim 15 ensures that the partial boom arranged in the rocker plane can be hinged to the uppercarriage in accordance with conventional design.
- the arranged in the rocker sub-boom can serve as a receiving space for the hydraulic cylinder for telescoping the boom.
- the arranged in the rocker sub-boom can absorb high acting in the rocker plane bending forces due to its partial cross-sectional area Ai. The flexural rigidity of the boom is thus correspondingly high.
- a 2 A 3 .
- a mobile telescopic crane according to claim 16 ensures a high bending stiffness of the boom relative to bending forces acting perpendicular to the rocker plane.
- a lower sub-boom facing the undercarriage is arranged in the rocker plane and two upper sub-arms facing away from the undercarriage are arranged spaced from the rocking plane, the width of the boom of the lower-part boom takes in the direction of the upper part Boom too. The width of the boom thus increases from its underside towards the top.
- the arranged in the rocker lower Opera- boom is essentially only loaded due to pressure acting in the rocker plane bending forces. Bending forces acting perpendicular to the rocker plane essentially do not result in any pressure loads in the lower part boom.
- the arrangement of exactly three sub-boom thus on the one hand, the area moment of inertia is increased in accordance with the invention, but on the other hand avoided a double pressure load of individual sub-boom due to acting in the rocker plane and perpendicular to the rocker bending forces, whereby an undesirable restriction of the load be given would. Accordingly, the bending stiffness is optimized with respect to perpendicular to the rocker plane bending forces by the arrangement of the sub-boom.
- the distance of the upper part of the cantilever to the rocker is variable in sizing of the boom in wide ranges, since in particular in the transport position of the boom, the space at the top of the boom is not limited.
- a mobile telescopic crane according to claim 17 ensures an equal stiffness behavior of the boom in the positive and negative lateral direction. Furthermore, the boom is simple.
- a mobile telescopic crane according to claim 18 enables an optimal design of the lower boom part with respect to acting in the rocker bending forces. Due to the cross-section of the lower part cantilever, the cantilever allows a higher flexural rigidity in comparison to conventional cantilevers compared to flexural strength acting in the seesaw plane. In particular, the compressive strength of the lower part cantilever is considerably improved by the shape of the cross section compared to conventional cantilevers having a substantially rectangular cross section. In addition, the weight of the boom can be optimized by the cross section of the lower boom.
- the lower partial boom has a circular or oval cross-section over the entire partial cross-sectional area.
- the cross-section may, for example for manufacturing or functional reasons, deviate in sections from a circular or oval cross-sectional shape.
- the respective cross section may be flattened in sections.
- the lower sub-boom has an oval cross-section, then for a maximum width Bi perpendicular to the seesaw plane and a maximum height Hi in the rocker plane Hi / Bi> 1, in particular Hi / Bi> 1.2, and in particular > 1.5.
- the lower sub-boom overlaps in the direction of the rocker plane with the upper sub-arms.
- a mobile telescopic crane according to claim 19 allows in a simple and space-saving manner a telescoping of the boom.
- a mobile telescopic crane according to claim 20 ensures a high rigidity of the boom relative to bending forces acting perpendicular to the rocker plane. By the end-side locking of adjacent sub-boom sections of the upper boom part laterally acting bending forces are derived directly into the entire boom and absorbed by this. This is ensured, in particular, by the fact that the respective at least one locking bolt is fastened or displaceably mounted directly on the associated or adjacent connecting element.
- a mobile telescopic crane according to claim 21 allows a simple and space-saving cable guide.
- a mobile telescopic crane according to claim 22 ensures in the usual way the lifting of loads by means of a supporting cable.
- the carrying cable is guided from a free end of the boom to a cable winch arranged on the superstructure.
- the carrying cable is preferably guided in the cable guide channel.
- FIG. 1 is a perspective view of a mobile telescopic crane according to a first embodiment with a telescopic boom of three sub-arms, which is in a transport position,
- FIG. 2 shows a cross section through the boom in Fig. 1 in the region of a connecting element
- FIG. 3 is a perspective view of the mobile telescopic crane in FIG.
- FIG. 4 is a perspective view of the mobile telescopic crane in FIG.
- FIG. 6 shows a cross section through the extended boom in Fig. 5 in the region of a first boom section to illustrate the arrangement of the sub-boom
- FIG. 7 is a perspective view of a mobile telescopic crane according to a second embodiment with a built-up of three sub-arms boom, which is in an extended operating position,
- Fig. 8 is a perspective view of a mobile telescopic crane
- FIG. 9 is a perspective view of the mobile telescopic crane in FIG.
- FIG. 10 is a side view of the mobile telescopic crane in Fig. 9,
- FIG. 11 shows a cross section through the boom in Fig. 10 along the
- FIG. 12 shows a cross section through the boom in Fig. 10 along the
- a mobile telescopic crane 1 has a mobile undercarriage 2, on which an uppercarriage 3 with a counterweight 4 are arranged.
- the undercarriage 2 is designed in the usual way for driving on public roads.
- the undercarriage 2 on a base frame 5 on which a plurality of axles 6 are mounted thereon arranged wheels 7, which are drivable and steerable in a conventional manner.
- the superstructure 3 and the counterweight 4 arranged thereon are rotatably mounted on the undercarriage 2 about a rotation axis 8 which runs perpendicular to the base frame 5.
- a boom 9 is arranged, which is by means of a hydraulic cylinder 10 in a rocking plane W pivotally and in a longitudinal direction L telescopic.
- the boom 9 has three boom sections 11 to 13, which can be telescoped in and out by means of a hydraulic cylinder 14 and thus can be transferred from a retracted transport position to an extended operating position.
- the first boom section 11 is pivoted at the end about a horizontal pivot axis 15 pivotally mounted on the uppercarriage 3.
- the pivoting of the boom 9 in the rocker plane W by means of the hydraulic cylinder 10, which is spaced from the upper carriage 3 spaced from the pivot axis 15 to the boom section 11 is articulated.
- the boom 9 has three sub-arms 16, 17, 18, each of which is telescopically constructed from three sub-boom sections 19 to 21, 22 to 24 and 25 to 27.
- the hydraulic cylinder 14 is disposed within a receiving space of the sub-boom 16, which is designed to form the receiving space as a hollow cylinder.
- the sub-arms 16 to 18 are arranged transversely to the longitudinal direction L at a distance from each other and connected by four rigid connecting elements 28 to 31 with each other.
- the connecting elements 28 and 29 are respectively arranged at the end on the sub-boom sections 19, 22 and 25 and form with these the first boom section 11.
- the connecting element 30 is in turn on the first boom section 11 opposite end of the boom sections 20, 23 and 26th Accordingly, the connecting element 31 is arranged on a second boom section 12 facing away from the end of the boom sections 21, 24 and 27 and forms with these the third boom section thirteenth
- the boom 9 is constructed symmetrically to the rocker W and has a designated as a heavy line and lying in the rocker plane W boom central longitudinal axis 32.
- the sub-arms 16 to 18 correspondingly have associated sub-boom center longitudinal axes 33 to 35, which are arranged polygonal or triangular and symmetrical to the rocker plane W.
- the central longitudinal axes 34 and 35 have the same distances b 2 and b 3 perpendicular to the rocker plane W.
- central longitudinal axes 34, 35 to the central longitudinal axis 32 a distance h 2 and h 3 parallel to the rocker W on.
- the disposed in the rocker W and the undercarriage 2 facing, lower boom part 16 thus forms a bottom of the boom 9, whereas the spaced arranged to the rocker W and the undercarriage 2 facing away, upper part boom 17, 18 a top of the boom 9 form.
- the boom 9 is perpendicular to the rocker W level a width B which increases from the lower boom 16 toward the upper boom 17, 18 up to a maximum width B A. This is illustrated in FIG. 6.
- the partial boom sections 19 to 27 are designed as hollow cylinders and have a circular cross-section.
- the sub-boom section 19 has an outer radius Ri which is larger than the respective outer radius R 2 and R 3 of the sub-boom sections 22 and 25.
- the boom 9 thus has in the region of the boom section 11 a height or a maximum height H A , which results from the sum of R l5 R 2 , hi and h 2 .
- the boom 9 in the region of the boom section 11 has a width or a maximum width B A , which results from the sum of R 2 , R 3 , b 2 and b 3 .
- the boom portions 19, 22 and 25 are perpendicular to to the luffing plane W partial cross-sectional areas A l5 A 2 and A 3, each of which extends from the circular area with the associated Außemadius R l5 R 2 and R 3 result.
- the cross-sectional area A A is illustrated in FIG. 6 by the dotted lines which each extend tangentially between adjacent sub-boom sections 19, 22, 25.
- the dotted lines together with the sub-boom sections 19, 22, 25 form a peripheral line of the boom section 11.
- the peripheral line defines the cross-sectional area A A.
- the cross-sectional area A A results in that a rope forming the peripheral line is taut about the partial boom sections 19, 22, 25.
- the boom 9 in comparison to conventional cantilevers on a higher area moment of inertia I z ges or I ges ges with respect to perpendicular to the rocker plane W and acting in the rocker plane W bending forces.
- the area moment of inertia I z ges with respect to bending forces acting perpendicular to the rocker plane W, that is to say with a bend about the z-axis, results in:
- i is a run index for the sub-arms
- I zi is the intrinsic portion of the sub-boom i
- a Mi is the material cross-sectional area of the sub-boom i
- n is the number of sub-arms.
- i is a run index for the sub-arms
- I y i is the intrinsic component of the sub-boom i
- a Mi is the material cross-sectional area of the sub-cantilever i
- a Mi is the parter i rocker share i and
- n is the number of sub-arms.
- equation (2) has to take into account a reduction factor ⁇ in the Steiner shares.
- the moments of inertia of the area represent a measure of the rigidity of the jib 9 with respect to the respective bending forces. Due to the Steiner shares, the moments of inertia are considerably increased compared to conventional jibs.
- the connecting elements 28 to 31 are designed substantially as dreieckför- shaped plates and each have two passage openings 36, 37 for the partial boom sections 22 to 27 of the sub-arms 12 and 13. Furthermore, the connecting elements 28 to 31 each have a rectangular passage opening 38 for the sub-boom sections 19 to 21 of the sub-boom 16, which extends approximately to the central longitudinal axes 34, 35.
- the passage openings 38 thus form in the connecting elements 28 to 31 a cable guide channel 39 for guiding a support cable 52.
- the support cable 52 is guided in the usual way from the free end of the boom 9 to a winch 53 arranged on the uppercarriage 3.
- the support cable 52 is guided at the free end of the boom 9 via two pulleys 54, 55 which are rotatably supported by a support frame 56 at the free end of the boom 9.
- the sub-arms 17 and 18 are displaceable relative to the sub-boom 16 parallel to the rocker plane W.
- two hydraulic cylinders 40 are fixedly arranged thereon and with the connection selement
- FIGS. 2 and 5 show, for example, the locking unit 42 associated with the partial boom section 19 and with the connecting element 29.
- the locking unit 42 has two locking bores 43 arranged opposite one another and opening into the passage opening 38, which run perpendicular to the rocker plane W.
- associated locking bolt 44 which are feasible by locking holes 45 of the sub-boom section 19 and the locking holes 43, a locking or unlocking is possible.
- the locking bolts 44 are hydraulically, pneumatically or electromechanically actuated, for example.
- the hydraulic cylinders 40, 41 and the locking units 42 of the boom 9 can be transferred from a transport position to an operating position and vice versa.
- the cross-sectional area A A and the height H A of the boom 9 is reduced compared to the operating position, whereby the mobile telescopic crane 1 has a lower overall height.
- the reduction of the overall height is required, for example, in order not to exceed a maximum permitted height in road traffic.
- the locking units 42 belonging to the connecting elements 29 and 30 have locking bores 46, by means of which the locking bolts 44 can also be guided.
- the locking holes 46 are respectively formed in the inner sub-boom section 20 and 21 so that in the locked state, the adjacent sub-boom sections 19 and 20 or 20 and 21 are locked in the longitudinal direction L.
- L locking units 47 and 48 are further provided, which are arranged in the region of the connecting elements 29 and 30.
- the locking units 47 and 48 are mounted or attached directly to the respectively associated connecting element 29 or 30.
- the locking units 47, 48 each have locking holes 49, 50 which are formed in the adjacent sub-boom sections 22 and 23, 23 and 24, 25 and 26 and 26 and 27.
- a respective locking bolt 51 is feasible, so that the desired mechanical locking of the boom sections 11 and 12 and 12 and 13 can be achieved.
- two locking devices may be provided corresponding to the locking units 42.
- Lung bolts 51 may be provided, which are arranged opposite to each other and in respective associated locking holes 49, 50 are displaced.
- the locking bolts 51 are hydraulically, pneumatically or electromechanically actuated, for example.
- Figs. 1 and 2 show the mobile telescopic crane 1 in the intended state for driving.
- the boom 9 is in a fully retracted transport position.
- the locking units 42, 47 and 48 are unlocked and the boom sections 11 to 13 telescoped.
- the sub-arms 17 and 18 are completely lowered by means of the hydraulic cylinders 40, 41, so that the sub-boom 16 is arranged completely in the passage openings 38.
- the mobile telescopic crane 1 has the lowest possible total height, so that the maximum permitted height in the road is not exceeded.
- Fig. 2 illustrates the transport position of the boom 9 based on a cross section through the connecting element 29th
- FIG. 3 shows the mobile telescopic crane 1 with the boom 9 located in a telescoping operating position.
- the lifting cylinders 40, 41 By means of the lifting cylinders 40, 41, the sub-arms 17, 18 and the connecting elements 28 to 31 became relative to the sub-boom 16 extended parallel to the rocker plane W.
- the locking units 42 belonging to the connecting elements 28 and 31 are subsequently locked.
- the boom 9 is erected by means of the hydraulic cylinder 10 in the rocker plane W and auste- by means of the hydraulic cylinder 14 auste- les.
- 4 shows the mobile telescopic crane 1 in an operating position with the fully erected and telescoped boom 9.
- the connecting elements 29 and 30 belong to the Locking units 42, 47 and 48 also locked, so that the boom 9 has a high rigidity.
- FIG. 5 shows a cross section through the locking units 47, 48 adjacent to the connecting element 29.
- the boom 9 according to the invention has a high rigidity against bending forces perpendicular and parallel to the rocker plane W due to the high area moments of inertia. This can be achieved in relation to the weight of the boom 9, a significant load increase.
- no separate transport and no complex assembly is required compared to a conventional boom with guy supports.
- FIG. 7 a second embodiment of the invention will be described with reference to FIG. 7.
- the sub-arms 17a, 18a by means of the connecting elements 28a to 31a fixed to the sub-arm 16a arranged and relative to this not displaced. If this is the maximum allowable height of the mobile telescopic crane la is not exceeded, so a simplification of the structure of the boom 9a is possible.
- the connecting elements 28a to 3 la are fixedly arranged on the sub-arm 16a, the locking holes 43 can be omitted.
- FIGS. 8 to 12 a third embodiment of the invention will be described with reference to FIGS. 8 to 12.
- the cable guide channel 39b is formed in the connecting elements 28b to 31b above the sub-arm 16b.
- the sub-boom center longitudinal axis 33 of the sub-boom 16b extends at the intersection of the maximum height Hi and the maximum width Bi of the sub-boom 16b.
- the sub-arm 16b arranged in the rocker plane W has a maximum width Bi perpendicular to the rocker plane W and a maximum height Hi in the rocker plane W, where: Hi / Bi> 1, in particular Hi / Bi> 1,2, and especially Hi / Bi> 1.5.
- the partial cross-sectional area Ai is in each case larger than the partial cross-sectional area A 2 and A 3 .
- the boom 9b has in the region of the boom section 1 lb a maximum height H A , which results from the sum of Hi and R 2 minus the overlap measure h 12 . Furthermore, in the region of the boom section 1 lb, the boom 9b has a maximum width B A , which results from the sum R 2 , R 3 , b 2 and b 3 .
- the sub-arms 17b, 18b are arranged according to the second embodiment at a fixed distance to the sub-boom 16b. Alternatively, the sub-arms 17b, 18b according to the first embodiment relative to the sub-boom 16b be displaced.
- the hydraulic cylinder 14b for telescoping the boom 9b is disposed inside the sub-boom 16b.
- the locking units 47b, 48b are fastened directly to the connecting elements 29b, 30b so that adjacent partial boom sections 22b and 23b, 23b and 24b, 25b and 26b as well as 26b and 27b can be mechanically locked to each other at the end.
- the locking units 47b, 48b each have two oppositely disposed locking bolts 51b, which can be guided by respectively associated locking bores 49, 50.
- the locking bolts 5 lb are hydraulically, pneumatically or electromechanically actuated, for example.
- the boom 9b has a high bending stiffness with regard to bending forces acting in the rocker plane W and bending forces acting perpendicularly to the rocker plane W. Due to its oval cross-section and its partial cross-sectional area Ai, the partial boom 16b can absorb, in particular, high bending forces which act in the rocker plane W. With regard to the further structure and the further operation of the mobile telescopic crane lb reference is made to the preceding embodiments.
- the features of the boom 9 to 9b are basically combined in any way to a boom according to the invention.
- the booms 9 to 9b according to the invention can be optimized separately in each boom section 11 to 13b for the acting bending forces, so that they are continuously borrowed along the boom 9 to 9b and not only at the end of the boom.
- both the transfer of the boom 9 to 9b in the operating position and their operation is extremely simple.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010063456 | 2010-12-17 | ||
PCT/EP2011/073018 WO2012080452A1 (de) | 2010-12-17 | 2011-12-16 | Mobil-teleskopkran |
Publications (2)
Publication Number | Publication Date |
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EP2504267A1 true EP2504267A1 (de) | 2012-10-03 |
EP2504267B1 EP2504267B1 (de) | 2013-07-10 |
Family
ID=45350773
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP11797251.3A Active EP2504267B1 (de) | 2010-12-17 | 2011-12-16 | Mobil-teleskopkran |
EP11797252.1A Active EP2651812B1 (de) | 2010-12-17 | 2011-12-16 | Mobil-teleskopkran |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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EP11797252.1A Active EP2651812B1 (de) | 2010-12-17 | 2011-12-16 | Mobil-teleskopkran |
Country Status (7)
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US (2) | US9637358B2 (de) |
EP (2) | EP2504267B1 (de) |
JP (2) | JP5934717B2 (de) |
CN (2) | CN103261083B (de) |
DE (1) | DE202011110230U1 (de) |
RU (2) | RU2548652C2 (de) |
WO (2) | WO2012080455A1 (de) |
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WO2018134249A1 (de) * | 2017-01-20 | 2018-07-26 | Terex Global Gmbh | Teleskopausleger mit stangenabspannsystem für einen mobilkran und abspannverfahren hierfür |
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CN103043541B (zh) * | 2012-12-31 | 2015-09-16 | 大连理工大学 | 双箱型伸缩臂结构 |
CN103754757A (zh) * | 2013-08-22 | 2014-04-30 | 柳州柳工叉车有限公司 | 伸缩臂吊钩 |
JP6223071B2 (ja) * | 2013-08-30 | 2017-11-01 | 株式会社タダノ | クレーン装置のブーム伸縮機構 |
DE202014004976U1 (de) * | 2014-06-16 | 2014-08-07 | Liebherr-Werk Ehingen Gmbh | Teleskopausleger und Kran |
JP6531505B2 (ja) * | 2015-06-11 | 2019-06-19 | 株式会社タダノ | 伸縮ブームの取付構造 |
DE102016114837A1 (de) | 2016-08-10 | 2018-02-15 | Terex Global Gmbh | Teleskopausleger mit Abspannsystem für einen Mobilkran und Abspannverfahren hierfür |
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WO2018140881A1 (en) * | 2017-01-30 | 2018-08-02 | National Oilwell Varco, L.P. | Telescopic deployment mast |
CN107686062B (zh) * | 2017-08-02 | 2019-06-11 | 中建三局集团有限公司 | 一种可变角度的自升式塔吊 |
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- 2011-12-16 EP EP11797251.3A patent/EP2504267B1/de active Active
- 2011-12-16 US US13/994,377 patent/US9637358B2/en active Active
- 2011-12-16 RU RU2013125916/11A patent/RU2548652C2/ru active
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- 2011-12-16 WO PCT/EP2011/073018 patent/WO2012080452A1/de active Application Filing
- 2011-12-16 DE DE202011110230U patent/DE202011110230U1/de not_active Expired - Lifetime
- 2011-12-16 CN CN201180060629.XA patent/CN103269970B/zh active Active
- 2011-12-16 JP JP2013543808A patent/JP5953315B2/ja active Active
- 2011-12-16 EP EP11797252.1A patent/EP2651812B1/de active Active
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WO2018134249A1 (de) * | 2017-01-20 | 2018-07-26 | Terex Global Gmbh | Teleskopausleger mit stangenabspannsystem für einen mobilkran und abspannverfahren hierfür |
US11130659B2 (en) | 2017-01-20 | 2021-09-28 | Tadano Demag Gmbh | Telescoping jib comprising a rod guying system for a mobile crane and guying method therefor |
Also Published As
Publication number | Publication date |
---|---|
WO2012080452A1 (de) | 2012-06-21 |
RU2013125915A (ru) | 2015-01-27 |
CN103261083B (zh) | 2015-04-29 |
CN103269970A (zh) | 2013-08-28 |
US20150008206A1 (en) | 2015-01-08 |
JP5953315B2 (ja) | 2016-07-20 |
JP2013545690A (ja) | 2013-12-26 |
JP5934717B2 (ja) | 2016-06-15 |
US9637358B2 (en) | 2017-05-02 |
DE202011110230U1 (de) | 2013-02-13 |
RU2013125916A (ru) | 2015-01-27 |
US20140158657A1 (en) | 2014-06-12 |
EP2504267B1 (de) | 2013-07-10 |
EP2651812B1 (de) | 2014-12-03 |
EP2651812A1 (de) | 2013-10-23 |
CN103269970B (zh) | 2015-04-29 |
CN103261083A (zh) | 2013-08-21 |
US9376292B2 (en) | 2016-06-28 |
RU2548652C2 (ru) | 2015-04-20 |
JP2013545691A (ja) | 2013-12-26 |
RU2547492C2 (ru) | 2015-04-10 |
WO2012080455A1 (de) | 2012-06-21 |
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