EP3656723A1 - Verbindungseinheit und hydraulischer kran mit solch einer verbindungseinheit - Google Patents

Verbindungseinheit und hydraulischer kran mit solch einer verbindungseinheit Download PDF

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Publication number
EP3656723A1
EP3656723A1 EP18207620.8A EP18207620A EP3656723A1 EP 3656723 A1 EP3656723 A1 EP 3656723A1 EP 18207620 A EP18207620 A EP 18207620A EP 3656723 A1 EP3656723 A1 EP 3656723A1
Authority
EP
European Patent Office
Prior art keywords
insertion part
connecting unit
actuating rod
supporting element
crane boom
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
Application number
EP18207620.8A
Other languages
English (en)
French (fr)
Other versions
EP3656723B1 (de
EP3656723C0 (de
Inventor
Erik Nylander
José María BADÍA SÁNCHEZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hiab AB
Original Assignee
Cargotec Patenter AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Cargotec Patenter AB filed Critical Cargotec Patenter AB
Priority to EP18207620.8A priority Critical patent/EP3656723B1/de
Publication of EP3656723A1 publication Critical patent/EP3656723A1/de
Application granted granted Critical
Publication of EP3656723B1 publication Critical patent/EP3656723B1/de
Publication of EP3656723C0 publication Critical patent/EP3656723C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B66C23/66—Outer or upper end constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type

Definitions

  • the present invention relates to a connecting unit according to the preamble of claim 1, which is configured for detachable mounting to the tip of a crane boom in order to form a connection between the crane boom and an associated crane implement.
  • the invention also relates to a hydraulic crane comprising such a connecting unit.
  • An ordinary loader crane is provided with a crane boom system which normally comprises a first crane boom in the form of a so-called inner boom, which is articulately connected to a rotatable column of the crane, and a second crane boom in the form of a so-called outer boom, which is telescopically extensible and articulately connected to the inner boom.
  • the outer boom comprises a hollow base section, through which the outer boom is articulately connected to the inner boom, and one or more telescopic crane boom sections, which are hollow and carried by the base section.
  • the telescopic crane boom sections are displaceable in the longitudinal direction of the base section by means of hydraulic cylinders for adjustment of the extension length of the outer boom. In order to extend the reach of the crane, i.e.
  • an additional crane boom may be temporarily and detachably mounted to the outer end of the outer boom by means of a connecting unit with an insertion part that is received inside the foremost telescopic crane boom section of the outer boom.
  • a detachable mounting of an additional crane boom to an outer boom of a hydraulic loader crane by means of such a connecting unit is for instance disclosed in DE 202008015659 U1 .
  • other types of crane implements such as for instance an aerial working platform, may be detachably mounted to a hollow crane boom section of a crane boom by means of a connecting unit with an insertion part of the above-mentioned type.
  • a known way to reduce the play between a hollow crane boom section and an insertion part of a connecting unit of the above-mentioned type is based on the insertion of a suitable number of plate-like metallic elements in the form of so-called shims in the gap between the crane boom section and the insertion part.
  • the shims are detachably secured to the outer surface of the insertion part at the rear end and/or front end thereof, for instance by means of screws, before the insertion part is inserted into the crane boom section.
  • several shims have to be assembled into a pile of shims.
  • Several attempts with different number of shims are often required before the insertion part has been properly fitted to the crane boom section, which implies that this procedure is rather laborious and time consuming.
  • the object of the present invention is to provide a new and favourable solution to the above-mentioned problem.
  • the connecting unit of the present invention comprises:
  • the play between the insertion part and the crane boom section is taken up by the supporting elements in a quick and easy manner by adjustment of the position of the supporting elements in relation to the insertion part under the effect of the actuating device after the insertion of the insertion part into the hollow crane boom section.
  • the insertion part can be made to fit almost perfectly to the crane boom section after the insertion of the insertion part into the crane boom section, even when there is a large gap between the insertion part and the crane boom section. Consequently, a connecting unit with an insertion part of a given size may be mounted to crane boom sections of various sizes. Furthermore, no laborious and time consuming handling of shims or the similar is required.
  • the actuating device comprises:
  • the supporting elements are individually moveable outwards in relation to the longitudinal axis of the insertion part by means of one and the same actuating rod, wherein each supporting element is free to continue its movement towards the inner surface of the crane boom section under the effect of the rotating actuating rod and the associated link mechanism when the other supporting element has already reached an end position in contact with the inner surface of the crane boom section and has stopped moving.
  • the supporting elements are arranged at an underside or upper side of the insertion part and configured to be moveable upwards and downwards in relation to the insertion part, wherein each supporting element has a V-shaped or convex contact surface configured for engagement with a V-shaped internal wall surface of said crane boom section.
  • the supporting elements will be capable of preventing the insertion part from moving upwards and downwards and also in lateral direction in relation to the crane boom section when they are pressed against the V-shaped internal wall surface at the lower or upper edge of the crane boom section.
  • the supporting elements are simultaneously moveable in opposite directions in an efficient manner by rotation of the actuating rod and without any axial or other translational movement of the actuating rod.
  • the interface between the actuating rod and the tool used by the crane operator to rotate the actuating rod will remain in a given position on the connecting unit during the rotation of the actuating rod, which will make it easy for the crane operator to effect the rotation of the actuating rod.
  • the invention also relates to a hydraulic crane having the features defined in claim 14.
  • a connecting unit 1 according to different embodiments of the present invention is illustrated in Figs 1-23 .
  • the connecting unit 1 is configured for detachable mounting to the tip 2 of a crane boom 27 in order to form a connection between the crane boom and an associated crane implement 4.
  • the crane implement 4 is an additional crane boom, which is telescopically extensible and articulately connected to the connecting unit 1 in such a manner that it is pivotable in relation to it about an axis of rotation that is essentially horizontal when the connecting unit 1 is mounted to the first-mentioned crane boom 27.
  • a hydraulic cylinder 6 is arranged between the connecting unit 1 and the additional crane boom 4 in order to pivot the additional crane boom 4 in relation to the connecting unit 1.
  • the connecting unit 1 could be configured to carry any other suitable type of crane implement, such as for instance an aerial working platform.
  • the connecting unit 1 comprises an insertion part 10, which is adapted to be inserted into a hollow crane boom section 27b6 at the tip 2 of the crane boom 27, and a holding part 11, which is rigidly fixed to the insertion part 10 and configured to form a support for the crane implement 4.
  • the holding part 11 is configured to project from the tip 2 of the crane boom 27 when the connecting unit 1 is mounted to the tip of the crane boom with the insertion part 10 received in said hollow crane boom section 27b6.
  • the connecting unit 1 comprises at least one supporting element 12a, 12b, 12a', 12b' which is moveably mounted to the insertion part 10 so as to be moveable transversely to the longitudinal axis of the insertion part in order to allow the supporting element to be pushed outwards in relation to the longitudinal axis of the insertion part 10 and against an inner surface of said hollow crane boom section 27b6 and thereby take up a play between the insertion part 10 and this hollow crane boom section.
  • each supporting element 12a, 12b, 12a', 12b' is moveable in relation to the insertion part 10 between a retracted position and an advanced position.
  • the connecting unit 1 also comprises an actuating device 13 for moving the supporting elements 12a, 12b, 12a', 12b' transversely to the longitudinal axis of the insertion part 10.
  • each supporting element 12a, 12b, 12a', 12b' are moveable in relation to the insertion part 10 under the effect of the actuating device 13.
  • the connecting unit 1 is mounted to a crane boom 27 of a hydraulic loader crane 20.
  • the illustrated crane 20 is mounted on a frame 21, which for instance may be connected to the chassis of a lorry.
  • the frame 21 is provided with adjustable support legs 22 for supporting the crane 20.
  • the crane 20 comprises:
  • liftable and lowerable crane boom refers to a crane boom which can be pivoted in a vertical plane so as to thereby perform liftings and lowerings of a load carried by the crane.
  • hydraulic cylinder for lifting and lowering the crane boom here refers to the hydraulic cylinder which is associated with the liftable and lowerable crane boom and which carries out the pivoting thereof in a vertical plane.
  • the outer boom 27 is telescopically extensible to enable an adjustment of the extension length thereof.
  • the outer boom 27 comprises a base section 27a, through which the outer boom 27 is articulately connected to the inner boom 25, and several telescopic and hollow crane boom sections 27b1-27b6 which are carried by the base section 27a and displaceable in the longitudinal direction of the base section by means of hydraulic cylinders 29 for adjustment of the extension length of the outer boom 27.
  • the connecting unit 1 is detachably mountable to the outer boom 27 by insertion of the insertion part 10 into the inner space of the foremost telescopic crane boom section 27b6 through an opening at the outer end of this crane boom section.
  • the connecting unit 1 of the present invention may of course also be designed for mounting to a hollow crane boom section of any other desired type of crane boom.
  • the actuating device 13 comprises:
  • each supporting element 12a, 12b, 12a', 12b' is moveable in relation to the insertion part 10 from the retracted position to the advanced position by rotation of the actuating rod 35 in said first rotary direction, and moveable in relation to the insertion part 10 from the advanced position to the retracted position by rotation of the actuating rod 35 in said second rotary direction.
  • the actuating rod 35 is at one end provided with a tool fitting 38 designed for detachable engagement with a tool to be used for rotating the actuating rod 35 in order to control the movement of the supporting elements 12a, 12b, 12a', 12b' in relation to the insertion part 10.
  • the actuating rod 35 extends through a recess 39 in an external wall 40 of the connecting unit 1 to thereby make the tool fitting 38 accessible from the outside of the connecting unit 1 when the insertion part 10 is received inside the associated crane boom section 27b6.
  • the rotatable actuating rod 35 is configured to control the movement of two supporting elements 12a, 12b, 12a', 12b'.
  • a rotatable actuating rod 35 of the type described above may also be configured to control the movement of only one supporting element or more than two supporting elements.
  • the connecting unit 1 is provided with two supporting elements 12a, 12b arranged at a distance from each other as seen in the longitudinal direction of the insertion part 10, wherein one supporting element 12a preferably is arranged at a first end of the insertion part 10 and the other supporting element 12b preferably is arranged at an opposite second end of the insertion part.
  • each supporting element 12a, 12b is slidably mounted to a wall 30 of the insertion part 10 so as to be linearly slidable perpendicularly to the longitudinal axis of the insertion part.
  • the slidable connection between the supporting element 12a, 12b and the associated wall 30 may for instance be achieved in that a cylindrical base part 14 of the supporting element 12a, 12b extends through a corresponding channel 31 in a sleeve-shaped holding member 32 fixed to said wall 30, wherein an outer surface of the cylindrical base part 14 is in sliding contact with the inner surface of the channel 31.
  • the supporting elements 12a, 12b may be configured to be moveable downwards and upwards in relation to the insertion part 10, wherein the supporting elements are arranged at an underside of the insertion part 10, as illustrated in Figs 1-15 , or at an upper side of the insertion part.
  • each supporting element preferably has a V-shaped or convex contact surface 15 configured for engagement with a V-shaped internal wall surface 33 (see Figs 4 and 5 ) at the lower or upper edge of the associated crane boom section 27b6.
  • the supporting elements 12a, 12b will prevent the insertion part 10 from moving upwards and downwards and also laterally in relation to the said crane boom section 27b6 when they are pressed against the V-shaped internal wall surface 33 of the crane boom section.
  • the supporting elements 12a, 12b are provided with V-shaped contact surfaces 15, the supporting elements may also effect a centering of the insertion part 10 inside the associated crane boom section 27b6 when they are pressed against the V-shaped internal wall surface 33 of the crane boom section.
  • each supporting element 12a, 12b comprises a support member 16, which is fixed to an outer end of the cylindrical base part 14 of the supporting element and located on the outside of the insertion part 10, wherein the above-mentioned contact surface 15 of the supporting element is provided on this support member 16.
  • the link system 37 illustrated in Figs 3-8 comprises:
  • connection members 41a, 41b With the above-mentioned arrangement of the connection members 41a, 41b, the distance between them is gradually changed when the actuating rod 35 is rotated.
  • the first link mechanism 37a comprises a first link 45, which at a first end is articulately connected to the first supporting element 12a and at an opposite second end is articulately connected to the first connection member 41a, and a second link 46, which at a first end is articulately connected to the first connection member 41a and at an opposite second end is articulately connected to a wall 47 of the insertion part 10.
  • the second link mechanism 37b comprises a third link 48, which at a first end is articulately connected to the second supporting element 12b and at an opposite second end is articulately connected to the second connection member 41, and a fourth link 49, which at a first end is articulately connected to the second connection member 41b and at an opposite second end is articulately connected to said wall 47 of the insertion part 10.
  • Each one of the above-mentioned links 45, 46, 48, 49 suitably comprises two link elements arranged in parallel with each other on opposite sides of the associated connection member 41a, 41b, as illustrated in Fig 6 .
  • the distance between the first and second connection members 41a, 41b is arranged to be at a maximum when the supporting elements 12a, 12b are in the retracted position, wherein the two links of each link mechanism 37a, 37b are inclined away from the two links of the other link mechanism 37b, 37a.
  • the distance between the first and second connection members 41a, 41b is:
  • the distance between the first and second connection members 41a, 41b may be arranged to be at a minimum when the supporting elements 12a, 12b are in the retracted position, wherein the two links of each link mechanism 37a, 37b are inclined towards the two links of the other link mechanism 37b, 37a.
  • the distance between the first and second connection members 41a, 41b is increased when the actuating rod 35 is rotated to move the supporting elements 12a, 12b outwards in relation to the longitudinal axis of the insertion part 10 and reduced when the actuating rod 35 is rotated in the opposite direction in order to move the supporting elements 12a, 12b inwards in relation to the longitudinal axis of the insertion part 10.
  • the connecting unit 1 may be locked to the associated crane boom section 27b6 by means of a locking bolt (not shown) that is inserted into holes 50 provided in the insertion part 10 and corresponding holes provided at the outer end of the crane boom section 27b6.
  • Figs 9 and 10 corresponds to the embodiment illustrated in Figs 3-8 , with the exception that the actuating rod 35 has been replaced by a hydraulic cylinder 51, which is configured to control the movements of the supporting elements 12a, 12b via a link system 37 designed in essentially the same way as the link system described above.
  • the piston rod 52 of the hydraulic cylinder 51 is articulately connected to one of the link mechanisms 37a, 37b of the link system 37 and the cylinder part 53 of the hydraulic cylinder is articulately connected to the other link mechanism.
  • the hydraulic cylinder 51 is connectable to the hydraulic system of the crane 20 by means of a hydraulic coupling (not shown) when the insertion part 10 of the connecting unit 1 has been inserted into the crane boom section 27b6.
  • the supply of hydraulic fluid to the hydraulic cylinder 51 is preferably controlled by the crane operator by means of a valve device (not shown), which is fixed to the connecting unit 1 and provided with a manually manoeuvrable manoeuvring member that is accessible from the outside of the connecting unit 1 when the insertion part 10 is received inside the crane boom section 27b6.
  • the actuating device 13 comprises a first hydraulic cylinder 55a for effecting the movement of the first supporting element 12a and a second hydraulic cylinder 55b for effecting the movement of the second supporting element 12a.
  • Each hydraulic cylinder 55a, 55b comprises a cylinder part 56 and a piston 57 displaceably received inside the cylinder part, wherein each supporting element 12a, 12b is connected to the piston 57 of the associated hydraulic cylinder.
  • the cylindrical base part 14 of each supporting element 12a, 12b is fixed directly to the piston 57 of the associated hydraulic cylinder, which implies that this base part 14 will function as a piston rod for the hydraulic cylinder.
  • the hydraulic cylinders 55a, 55b are connectable to the hydraulic system of the crane 20 by means of a hydraulic coupling (not shown) when the insertion part 10 of the connecting unit 1 has been inserted into the crane boom section 27b6.
  • the supply of hydraulic fluid to the hydraulic cylinders 55a, 55b is preferably controlled by the crane operator by means of a valve device (not shown), which is fixed to the connecting unit 1 and provided with a manually manoeuvrable manoeuvring member that is accessible from the outside of the connecting unit 1 when the insertion part 10 is received inside the crane boom section 27b6.
  • Figs 13-15 corresponds to the embodiment illustrated in Figs 3-8 , with the exception that the actuating rod 35 has been replaced by a flexible and elongated pulling element 60 in the form of a rope, a wire, a cable, a band or the similar, which is configured to control the movements of the supporting elements 12a, 12b via a link system 37 designed in essentially the same way as the link system described above.
  • the pulling element 60 runs over a pulley 61, which is rotatably connected to the second link mechanism 37b of the link system 37.
  • connection member 62 is fixed to the first link mechanism 37a of the link system and the other end of the pulling element is fixed to a connection member 62, which in its turn is fixed to an external wall 40 of the connecting unit 1.
  • the connection member 62 is provided with a shaft 63, which extends through a recess 64 in the external wall 40.
  • a nut 64 is in threaded engagement with an external thread on the shaft 63 and abuts against a shoulder 65 on the outside of the external wall 40. By rotation of the nut 64, the pulling element 60 can be made to exert a pulling force on the first and second link mechanisms 37a, 37b in order to thereby push the supporting elements 12a, 12b outwards in relation to the longitudinal axis of the insertion part 10.
  • the nut is rotated in the opposite direction in order to reduce the tension of the pulling element 60 and thereby allow the gravity to force the insertion part 10 downwards towards the support members 16 of the supporting elements 12a, 12b.
  • the actuating device 13 could comprise one or more electric motors for effecting the movement of the supporting elements 12a, 12b.
  • the connecting unit 1 comprises a first supporting element 12a' arranged on a first side of the actuating rod 35 and a second supporting element 12b' arranged opposite the first supporting element 12a' on an opposite second side of the actuating rod 35, wherein the supporting elements 12a', 12b' are laterally moveable in relation to the insertion part 10.
  • each supporting element 12a', 12b' comprises a base structure 70 and two support members 71 which are fixed to the base structure 70 and moveable in relation to the insertion part 10 together with the base structure 70.
  • Each support member 71 of the first supporting element 12a' is moveable through an associated recess 72 in a first lateral wall 73 of the insertion part 10
  • each support member 71 of the second supporting element 12b' is moveable through an associated recess 74 in a second lateral wall 75 of the insertion part 10 located opposite said first lateral wall 73.
  • the link system 37' included in the connecting unit 1 illustrated in Figs 16-23 comprises:
  • the second base part 80b is fixed to the insertion part 10 by means of two locking pins 88a, 88b, which are fixed to the second base part 80b on opposite sides thereof.
  • a first locking pin 88a has an inner end received in a hole 93a on a first side of the second base part 80b and an outer end received in a recess 89a provided in the first lateral wall 73 of the insertion part 10.
  • a second locking pin 88b has an inner end received in a hole 93b on a second side of the second base part 80b and an outer end received in a recess 89b provided in the second lateral wall 75 of the insertion part 10.
  • Each locking pin 88a, 88b is provided with an external thread that is in engagement with an internal thread in the associated hole 93a, 93b.
  • the position of each locking pin 88a, 88b in relation to the second base part 80b may be adjusted by rotation of the locking pin.
  • the actuating rod 35 is axially fixed in relation to the second base part 80b of the link system 37' so that the actuating rod is prevented from moving in its axial direction in relation to the second base part 80b when the actuating rod is rotated.
  • the actuating rod 35 extends through a through hole 92 in the second base part 80b.
  • the above-mentioned first set of links 83a comprises:
  • the above-mentioned second set of links 83b comprises:
  • the first base part 80a is moved in relation to the second base part 80b in the axial direction of the actuating rod 35 when the actuating rod is rotated.
  • the distance between the first and second base parts 80a, 80b is arranged to be at a maximum when the supporting elements 12a', 12b' are in the retracted position.
  • the first base part 80a is moved towards the second base part 80b when the actuating rod 35 is rotated in the above-mentioned first rotary direction in order to move the supporting elements 12a', 12b' outwards in relation to the longitudinal axis of the insertion part 10, as illustrated in Figs 19a and 19b , and the first base part 80a is moved away from the second base part 80b when the actuating rod 35 is rotated in the above-mentioned second rotary direction in order to move the supporting elements 12a', 12b' inwards in relation to the longitudinal axis of the insertion part 10.
  • the first and second supporting elements 12a', 12b' are to be in the retracted position during the insertion of the insertion part 10 into a hollow crane boom section 27b6 at the tip of a crane boom 27. Thereafter, the crane operator rotates the actuating rod 35 in the above-mentioned first rotary direction in order to move the first base part 80a of the link system 37' towards the second base part 80b and thereby make the links 84-87 push the first and second supporting elements 12a', 12b' in opposite directions outwards in relation to the longitudinal axis of the insertion part 10.
  • Each support member 71 of the first supporting element 12a' is thereby moved through the associated recess 72 in the first lateral wall 73 of the insertion part 10 and into contact with a first lateral wall 90 of the hollow crane boom section 27b6 on a first side of the insertion part 10, at the same time as each support member 71 of the second supporting element 12b' is moved through the associated recess 74 in the second lateral wall 75 of the insertion part 10 and into contact with a second lateral wall 91 of the hollow crane boom section 27b6 on an opposite second side of the insertion part 10.
  • the crane operator rotates the actuating rod 35 in the above-mentioned second rotary direction in order to move the first base part 80a of the link system 37' away the second base part 80b and thereby make the links 84-87 pull the first and second supporting elements 12a', 12b' inwards in relation to the longitudinal axis of the insertion part 10, wherein the support members 71 are moved out of contact with the lateral walls 90, 91 of the hollow crane boom section 27b6.
  • a plate-like element 76 a so-called shim, of suitable thickness may be positioned in contact with the outwardly facing surface of the base structure 70 of each supporting element 12a', 12b'.
  • Each shim 76 is configured to come into contact with the adjacent lateral wall 73, 75 of the insertion part 10 when the supporting elements 12a', 12b' reach the advanced position to thereby stabilize the insertion part 10 in relation to the supporting elements 12a', 12b'.
  • each shim 76 is configured to take up the possible play between the associated base structure 70 and the adjacent lateral wall 73, 75 of the insertion part 10 when the supporting elements 12a', 12b' are in the advanced position with the support members 71 in contact with the lateral walls 90, 91 of the hollow crane boom section 27b6. If the supporting elements 12a', 12b' are so dimensioned that no such play exists, no shim 76 is necessary.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Jib Cranes (AREA)
EP18207620.8A 2018-11-21 2018-11-21 Verbindungseinheit und hydraulischer kran mit solch einer verbindungseinheit Active EP3656723B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18207620.8A EP3656723B1 (de) 2018-11-21 2018-11-21 Verbindungseinheit und hydraulischer kran mit solch einer verbindungseinheit

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Application Number Priority Date Filing Date Title
EP18207620.8A EP3656723B1 (de) 2018-11-21 2018-11-21 Verbindungseinheit und hydraulischer kran mit solch einer verbindungseinheit

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EP3656723A1 true EP3656723A1 (de) 2020-05-27
EP3656723B1 EP3656723B1 (de) 2023-06-28
EP3656723C0 EP3656723C0 (de) 2023-06-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757040A1 (de) * 1977-12-21 1979-07-05 Hans Scheuerpflug Teleskop-anordnung
DE202008015659U1 (de) 2008-11-26 2009-03-19 Palfinger Ag Kranspitze für einen Ladekran
DE102011116083A1 (de) * 2011-10-11 2013-04-11 Hydrosaar Gmbh Sicherungs- und Verriegelungseinheit für Ausleger mit teleskopierbaren Schüssen, insbesondere bei Mobilkranen
WO2017150706A1 (ja) * 2016-03-03 2017-09-08 株式会社タダノ 伸縮機構

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757040A1 (de) * 1977-12-21 1979-07-05 Hans Scheuerpflug Teleskop-anordnung
DE202008015659U1 (de) 2008-11-26 2009-03-19 Palfinger Ag Kranspitze für einen Ladekran
DE102011116083A1 (de) * 2011-10-11 2013-04-11 Hydrosaar Gmbh Sicherungs- und Verriegelungseinheit für Ausleger mit teleskopierbaren Schüssen, insbesondere bei Mobilkranen
WO2017150706A1 (ja) * 2016-03-03 2017-09-08 株式会社タダノ 伸縮機構

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EP3656723B1 (de) 2023-06-28
EP3656723C0 (de) 2023-06-28

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