EP3838831A1 - Télescope multiple - Google Patents

Télescope multiple Download PDF

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Publication number
EP3838831A1
EP3838831A1 EP20213472.2A EP20213472A EP3838831A1 EP 3838831 A1 EP3838831 A1 EP 3838831A1 EP 20213472 A EP20213472 A EP 20213472A EP 3838831 A1 EP3838831 A1 EP 3838831A1
Authority
EP
European Patent Office
Prior art keywords
telescopic element
locking device
central
extension
retraction
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.)
Withdrawn
Application number
EP20213472.2A
Other languages
German (de)
English (en)
Inventor
Frank Krüger
Torsten Verkoyen
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.)
XCMG European Research Center GmbH
Original Assignee
XCMG European Research Center GmbH
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 XCMG European Research Center GmbH filed Critical XCMG European Research Center GmbH
Publication of EP3838831A1 publication Critical patent/EP3838831A1/fr
Withdrawn legal-status Critical Current

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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
    • B66C23/70—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 multiple telescope with at least three profile-shaped telescopic elements arranged one inside the other, in particular for use in loading cranes or lifting platforms, the inner telescopic elements being power-operated extendable and also retractable.
  • Such multiple telescopes are known in various designs from practice. They are used, among other things, in loading cranes or working lifting platforms.
  • the disadvantage here is that the telescopic elements are pushed out with a force acting on all inner telescopic elements.
  • frictional forces and other forces counteract this force differently in the various telescopic elements.
  • the forces vary and cannot be clearly determined, which means that there is no regulated extension of the individual telescopic elements, for example from the outside to the inside, or a regulated retraction of the individual telescopic elements, for example from the inside to the outside.
  • this is desirable because the more stable and resilient outer telescopic elements should be extended first and, conversely, the less stable and less resilient inner telescopic elements should be retracted first.
  • the object of the invention is to avoid the above-mentioned disadvantages and to specify a multiple telescope with which the desired sequence when moving in and out is implemented.
  • the telescopic elements comprise an outer telescopic element, an inner telescopic element and at least one central telescopic element, each central telescopic element being assigned on the one hand an extension locking device that enables the next inner telescopic element to be extended prevented as long as the central telescopic element itself is not fully extended, and each central telescopic element is assigned a retractable locking device that prevents retraction of this central telescopic element as long as the next inner telescopic element is not fully retracted.
  • the outermost central telescopic element is the first telescopic element that is extended because the next inner telescopic element, which can be either a central telescopic element or the inner telescopic element, is still locked until the outermost center -Telescopic element itself is fully extended.
  • the innermost telescopic element is the first telescopic element, which is retracted because the next inner central telescopic element is still locked until the inner telescopic element itself is fully retracted.
  • the entry sequence is from the inside to the outside.
  • each extension locking device can comprise, on the one hand, an extension locking device which is provided on the central telescopic element in that initial area which, in the fully extended state of the central telescopic element, is still in the next outer one Telescopic element is located, the extension locking device between a locking position preventing the extension of the next inner telescopic element on the one hand and a release position allowing the extension of the next inner telescopic element on the other hand, and each extension locking device can on the other hand include a recess in the next outer telescopic element is provided in that area which, when the central telescopic element is fully extended, adjoins the extending locking device, the extending locking device interacting with the recess in such a way that it is displaced from the locking position into the release position when the telescopic element is completely in extended state is located, and wherein furthermore each extension locking device has a locking surface facing the next inner telescopic element, the next inner telescope still pelement is provided with a locking cam which adjoins the extension
  • each retractable locking device can on the one hand comprise a retractable locking device which is provided on the central telescopic element in that initial area that is still in the next outer telescopic element in the fully extended state of the central telescopic element, the retractable locking device between a locking position preventing the retraction of the central telescopic element on the one hand and a release position permitting retraction of the central telescopic element on the other hand can be displaced, and each retractable locking device can on the other hand comprise a recess which is provided in the next outer telescopic element in that area which is completely in the extended state of the central telescopic element adjoins the retractable locking device, the retractable locking device cooperating with the recess in such a way that it moves out of the locking position is shifted into the release position when the next inner telescopic element is in the fully retracted state, each retractable locking device furthermore has a locking surface facing the next outer telescopic element, which interacts with the recess when the next inner
  • each retraction locking device can comprise a blocking element which can be displaced between a blocking position and a release position and, in its blocking position, prevents the retraction locking device from moving from its locking position into its releasing position, the blocking element being moved into the blocking position by a spring force and is automatically displaced into the release position against the spring force by means of an actuation area assigned to the next inner telescopic element when the next inner telescopic element is fully retracted.
  • At least one suitable drive preferably designed as a hydraulic cylinder, which acts on the innermost telescopic element, can be provided for the power-operated extension and retraction of the inner telescopic elements.
  • the drive can be attached to the outermost telescopic element.
  • each inner telescopic element can be assigned a hydraulic cylinder or another suitable drive which acts on the respective inner telescopic element and is attached to the next outer telescopic element.
  • the drives of the inner telescopic elements can each be designed as hydraulic cylinders, all of which are connected to a common hydraulic pressure supply for uniform application.
  • the extension locking device in at least one extension locking device, can comprise an approximately T-shaped rocker with a longitudinal beam and a transverse beam, the rocker being hinged to the central telescopic element with the free end of the longitudinal beam, and wherein the area of the transverse beam pointing in the direction of the next inner telescopic element forms the locking surface when the multiple telescope is extended.
  • the retractable locking device in at least one retractable locking device, can comprise an approximately T-shaped rocker with a longitudinal beam and a transverse beam, the rocker being hinged to the central telescopic element with the free end of the longitudinal beam, and wherein the area of the transverse beam pointing in the direction of the next outer telescopic element forms the locking surface when the multiple telescope is retracted.
  • the area of the crossbar of the rocker that points in the direction of the next outer telescopic element can have a sliding surface or a roller for low-friction contact with the next outer telescopic element.
  • Fig. 1 and 2 shows a first embodiment of a multiple telescope 1 according to the invention with three nested profile-shaped telescopic elements 2, 3, 4 in different extended positions.
  • These telescopic elements 2, 3, 4 comprise an outer telescopic element 2, a central telescopic element 4 and an inner telescopic element 3.
  • the inner telescopic elements i.e. in this embodiment the central telescopic element 4 and the inner telescopic element 3, are each force-operated extendable as well as retractable again.
  • the various extension positions are in the Fig. 1 a) to 1 d) shown, whereas the various retraction positions in the Fig. 2 a) to 2 d) are shown.
  • the central telescopic element 4 is assigned an extension locking device 5, which prevents the next inner telescopic element from being extended, i.e. in this embodiment an extension of the inner telescopic element 3, as long as the central telescopic element 4 itself is not fully extended (cf. Fig. 1 b) ).
  • an extension of the inner telescopic element 3 as long as the central telescopic element 4 itself is not fully extended (cf. Fig. 1 b) ).
  • the central telescopic element 4 is also assigned a retractable locking device 6, which enables this central telescopic element 4 to be retracted prevented as long as the next inner telescopic element, i.e. in this embodiment the inner telescopic element 3, is not completely retracted (cf. Fig. 2 b) ).
  • the inner telescopic element 3 is the first telescopic element that is retracted because the central telescopic element 4 is still locked for so long (cf. Fig. 2 a) and 2 b) ) until the inner telescopic element 3 itself is completely retracted (cf. Fig. 2 c) .
  • the extension locking device 5 comprises, on the one hand, an extension locking device 7, which is provided on the central telescopic element 4 in that initial region 13 which, when the central telescopic element 4 is fully extended, is still in the next outer telescopic element , in this embodiment the outer telescopic element 2 is located.
  • the extension locking device 7 can be displaced between a locking position preventing extension of the next inner telescopic element, i.e. in this embodiment the inner telescopic element 3, on the one hand, and a release position allowing extension of the inner telescopic element 3, on the other hand.
  • the extension locking device 7 comprises a recess 9 which is provided in the next outer telescopic element, i.e. in this exemplary embodiment in the outer telescopic element 2, in that area 14 which, when the central telescopic element 4 is fully extended, is attached to the extension locking device 7 adjoins.
  • the extension locking device 7 interacts with the recess 9 in such a way that it is displaced from the locking position into the release position when the central telescopic element 4 is in the fully extended state.
  • the extension locking device 5 has a telescopic element next to the inside, that is to say the outside telescopic element in this exemplary embodiment 2, facing locking surface 10.
  • the next inner telescopic element that is to say the inner telescopic element 3 in this exemplary embodiment, is provided with a locking cam 11 which adjoins the extension locking device 5 when the inner telescopic element 3 is completely retracted.
  • the locking surface 10 is located in front of the locking cam 11 in the extension direction and is in contact with it, so that the next inner telescopic element is extended, i.e. the inner telescopic element 3 in this exemplary embodiment , prevented.
  • the retractable locking device 6 comprises a retractable locking device 8, which is attached to the central telescopic element 4 in that starting area 13 which, in the fully extended state of the central telescopic element 4, is still in the next outer telescopic element, i.e. in this embodiment the outer telescopic element 2, is provided.
  • the retraction locking device 8 can be displaced between a locking position preventing the retraction of the central telescopic element 4 on the one hand and a release position allowing retraction of the central telescopic element 4 on the other hand.
  • the retractable locking device 6 comprises a recess 9 which is provided in the next outer telescopic element, i.e. in this exemplary embodiment the outer telescopic element 2, in that area 14 which, when the central telescopic element 4 is fully extended, to the retractable locking device 8 adjoins.
  • the retractable locking device 8 interacts with the recess 9 in such a way that it is displaced from the locking position into the release position when the next inner telescopic element, that is to say at this one, is Embodiment, the inner telescopic element 3 is located in the fully retracted state.
  • the retractable locking device 6 has a locking surface 10 facing the next outer telescopic element, i.e. the outer telescopic element 2 in this exemplary embodiment, which when the next inner telescopic element is not completely retracted, i.e. the inner telescopic element 3 in this exemplary embodiment, with the recess 9 cooperates in such a way that a displacement of the central telescopic element 4 in the retraction direction is not possible.
  • the retractable locking device 8 comprises a blocking element 12 which can be displaced between a blocking position and a release position. In its blocking position, the blocking element 12 prevents the retraction locking device 7 from moving out of its locking position into its releasing position.
  • the blocking element 12 is moved into the blocking position by a spring force and, by means of an actuating area 15 assigned to the inner telescopic element 3, is automatically displaced against the spring force into the release position when the inner telescopic element 3 is fully retracted.
  • an approximately T-shaped rocker 16 with a longitudinal beam 17 and a transverse beam 17 is provided, which is hinged to the central telescopic element 4 with the free end of the longitudinal beam 17.
  • the area 19 of the crossbar 18 pointing in the direction of the inner telescopic element 3 forms the locking surface 10 when the multiple telescope 1 is extended.
  • the area 20 of the crossbar 18 pointing in the direction of the outer telescopic element 2 forms the locking surface 10 when the multiple telescope 1 is retracted.
  • a second embodiment of a multiple telescope 1 according to the invention is shown with four nested profile-shaped telescopic elements 2, 3, 4 in different extended positions.
  • These telescopic elements 2, 3, 4 comprise an outer telescopic element 2, two central telescopic elements 4a and 4b and an inner telescopic element 3.
  • the inner telescopic elements i.e. in this embodiment the central telescopic elements 4a and 4b and the inner telescopic element 3, can each be extended by force and again retractable.
  • FIG. 3 An extend position is in Fig. 3 shown, wherein the outer central telescopic element 4a is already extended and the inner central telescopic element 4b is already approximately half extended.
  • the inner telescopic element 3 is still in the locked, retracted state and thus not yet extended, since the corresponding extending locking device 7 of the inner telescopic element 3 is in its locking position.
  • extension locking device 7 When the inner central telescopic element 4b is extended even further, its extension locking device 7 comes into the area of the next outer telescopic element in which its recess 9 is provided. The extension locking device 7 can then be displaced from its locking position into its release position, so that the next inner telescopic element can then be extended.
  • Fig. 4 a retraction position is shown, the inner telescopic element 3 being almost completely retracted.
  • Both the outer central telescopic element 4a and the inner central telescopic element 4b are each still in the locked extended state and thus not yet retracted because the corresponding extension locking device 7 of the inner telescopic element 3 is in its locking position.
  • the inner telescopic element 3 When the inner telescopic element 3 is retracted further, it presses the blocking element against the spring force of the spring 21 from its current blocking position into its release position, so that a movement of the retraction locking device of the next outer telescopic element from its locking position into its releasing position is possible is and thus then the next outer telescopic element can be retracted.
  • Fig. 5 shows an enlarged detailed view of a third embodiment of a multiple telescope 1 according to the invention with three profile-shaped telescopic elements 2, 3, 4 arranged one inside the other in a perspective view in the not yet telescoped state.
  • the telescopic elements 2, 3, 4 comprise an outer telescopic element 2, a central telescopic element 4 and an inner telescopic element 3.
  • the central element are roughly T-shaped rockers, each of which is part of an extension locking device as well as part of a retraction locking device.
  • Each rocker is hinged with its free end of the longitudinal bar on a telescopic element, the area of the cross bar pointing in the direction of the next inner telescopic element forming the locking surface when the multiple telescope is extended and the area of the cross bar pointing in the direction of the next outer telescopic element being the locking surface Retraction of the multiple telescope forms.
  • the rocker arm is very precisely T-shaped, whereas the rocker arm in the one in the Fig. 5 and 6th
  • the embodiment shown is only approximately T-shaped and has a shape that is also pronounced of a mushroom.
  • the area of the crossbeam of the rocker that points in the direction of the next outer telescopic element has a roller 22 for low-friction contact with the next outer telescopic element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Telescopes (AREA)
EP20213472.2A 2019-12-11 2020-12-11 Télescope multiple Withdrawn EP3838831A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019134051 2019-12-11

Publications (1)

Publication Number Publication Date
EP3838831A1 true EP3838831A1 (fr) 2021-06-23

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ID=73834313

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Application Number Title Priority Date Filing Date
EP20213472.2A Withdrawn EP3838831A1 (fr) 2019-12-11 2020-12-11 Télescope multiple

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EP (1) EP3838831A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398645A (en) * 1966-11-30 1968-08-27 Nat Crane Corp Multiple extension apparatus
US3738075A (en) * 1971-06-16 1973-06-12 Nat Crane Corp Extendible boom with latch means for extension and retraction
JPS5019028B1 (fr) * 1970-08-07 1975-07-03
FR2446907A1 (fr) * 1979-01-18 1980-08-14 Telecommunications Internal Ci Perfectionnement aux pylones telescopiques
DE202006007012U1 (de) * 2006-05-03 2006-07-13 Smag Gmbh Mastanlage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398645A (en) * 1966-11-30 1968-08-27 Nat Crane Corp Multiple extension apparatus
JPS5019028B1 (fr) * 1970-08-07 1975-07-03
US3738075A (en) * 1971-06-16 1973-06-12 Nat Crane Corp Extendible boom with latch means for extension and retraction
FR2446907A1 (fr) * 1979-01-18 1980-08-14 Telecommunications Internal Ci Perfectionnement aux pylones telescopiques
DE202006007012U1 (de) * 2006-05-03 2006-07-13 Smag Gmbh Mastanlage

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