EP4337588A1 - Tête de verrouillage - Google Patents

Tête de verrouillage

Info

Publication number
EP4337588A1
EP4337588A1 EP22751753.9A EP22751753A EP4337588A1 EP 4337588 A1 EP4337588 A1 EP 4337588A1 EP 22751753 A EP22751753 A EP 22751753A EP 4337588 A1 EP4337588 A1 EP 4337588A1
Authority
EP
European Patent Office
Prior art keywords
telescopic
locking
cylinder
locking head
head 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
Application number
EP22751753.9A
Other languages
German (de)
English (en)
Other versions
EP4337588B1 (fr
Inventor
Markus Schuster
Jürgen Bopp
Hans-Peter Lavergne
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.)
Liebherr Components Kirchdorf GmbH
Original Assignee
Liebherr Components Kirchdorf 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 Liebherr Components Kirchdorf GmbH filed Critical Liebherr Components Kirchdorf GmbH
Publication of EP4337588A1 publication Critical patent/EP4337588A1/fr
Application granted granted Critical
Publication of EP4337588B1 publication Critical patent/EP4337588B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 present invention relates to a locking head for telescoping telescopic booms in and out, which can be used, for example, in telescopic boom cranes.
  • Such locking heads typically have a yoke, which releases a locking bolt in the telescopic boom by hydraulic actuation, so that the telescopic boom or a telescopic boom section of the telescopic boom is unlocked and can thus be moved.
  • the individual telescopic sections of a crane boom of a mobile crane are extended one after the other with the help of a telescoping cylinder and locked together in the extended position. This requires a locking mechanism that can be unlocked or locked in different positions.
  • a telescopic section Before a telescopic section can be moved, it must be coupled to the locking head. For this purpose, two corresponding bolts are shifted (so-called cylinder bolt bodies), which engage with the telescopic section. The telescopic section still coupled to the adjacent telescopic section is then unlocked by activating a corresponding unlocking mechanism. It is known from the prior art that a spring-loaded bolt is pulled by means of hydraulic actuation of a telescopic bolt body, so that the bolt with the locking head in Intervention standing telescopic section can be extended. As a result, it is now possible for the locking head to move the telescopic section by means of the telescoping cylinder, so that the telescopic section lying on the inside is extended.
  • the telescopic section In the extended position, the telescopic section must first be locked again with the neighboring telescopic section. To do this, the corresponding unlocking claw (actuated by at least one telescopic locking body) must be returned to its starting position, so that the telescopic section that has just been extended is firmly connected to an adjacent telescopic section.
  • the cylinder bolts between the locking head and the (just extended) telescopic section may only be released again when the two adjacent telescopic sections are locked together.
  • the telescoping cylinder then retracts again in order, if necessary, to relocate another telescopic section that has not yet been extended in the manner described above.
  • the actuation of the cylinder bolt body or the telescopic bolt body takes place with the help of a hydraulic system, which moves the corresponding body into the desired position.
  • a retraction or extension can also take place with the help of a spring element, so that when the hydraulic pressure decreases, the respective bodies are retracted or extended again in the locking head.
  • a disadvantage of such a locking head known from the prior art is that the locking head arranged at the movable end of a telescoping cylinder must have various hydraulic lines that must be able to enable corresponding control of the telescopic bolt body or the cylinder bolt body.
  • the object of the present invention is to provide a locking head which is lighter than the prior art implementations and allows for more economical operation. This is achieved with a locking head that has all the features from claim 1.
  • Advantageous configurations of the locking head according to the invention can be found in the dependent claims.
  • the locking head according to the invention for the telescoping cylinder of a telescopic boom which has several telescopic boom sections, comprises a housing, at least one bolt-like cylinder locking body which can be moved in and out of the housing in order to lock the locking head with a telescopic boom section, and at least one bolt-like telescopic locking body which can be moved in and out of the housing in order to release the telescopic boom section for a telescoping movement.
  • the locking head is characterized by at least one electric actuator, which is designed to actuate the at least one cylinder bolt body and/or the at least one telescopic bolt body.
  • an electric actuator eliminates the need to route hydraulic lines to the locking head, which are required for actuating the cylinder bolt body or the telescopic bolt body.
  • the overall system is cheaper and lighter, which is particularly advantageous in relation to the consistent effort towards lighter components.
  • both the at least one cylinder locking body and the at least one telescopic locking body are provided with a respective electric actuator. It does not have to be the case that the cylinder locking body and the telescopic locking body are driven by the same electric actuator, for example an electric motor. It would be conceivable here that only one species Coupling gives the force generated by the engine in a first case on the telescopic bolt body and in a second case on the cylinder bolt body, so that actuating the two bolt bodies one after the other is possible. As stated, the at least one cylinder bolt body and the at least one telescopic bolt body can each have their own electric actuator, so that it is also possible for the two different bolt bodies to be actuated one after the other.
  • the locking head is also provided with a spring element that urges the at least one cylinder bolt body and/or the at least one telescopic bolt body in the extension or retraction direction.
  • the electric actuator can only be used to retract the cylinder bolt body or the telescopic bolt body, so that a state in which the at least one cylinder bolt body is retracted (and thus a coupling with a telescopic section gives up) only occurs if this is actively implemented by energizing the electric actuator is.
  • the situation is similar with the at least one telescopic locking body, whose retracted state (in which a coupling of a telescopic section with an adjacent telescopic section no longer exists) can also only be actively implemented by energizing the electric actuator. If there is a malfunction in the electric actuator, the spring element ensures that the telescopic locking body or the cylinder locking body remains permanently in the position that entails the lowest risk potential.
  • the locking head is also provided with a magnet element, in particular an electromagnet element, which urges the at least one cylinder bolt body and/or the at least one telescopic bolt body in the extension or retraction direction.
  • the magnetic element is designed to urge the cylinder bolt body or the telescopic bolt body in the extension or retraction direction.
  • the at least one electric actuator is designed to move the at least one cylinder bolt body and/or the at least one telescopic bolt body in the retraction and/or extension direction.
  • the electric actuator can only move the telescopic locking body or the cylinder locking body in the direction opposite to the force of the spring element or the magnetic element.
  • the element for urging in the extension direction is designed to move the locking body outwards even if the electric actuator fails and/or is not supplied with electric power.
  • the element for urging in the retraction direction is designed to move the locking body outwards even if the electric actuator fails and/or is not supplied with electric power.
  • the at least one cylinder locking body and/or the at least one telescopic locking body has a thread for engagement with a spindle driven by the electric actuator.
  • the thread can run on an outer circumference of the locking body but can also be provided on an inner circumference of a blind hole.
  • the electric actuating drive rotates an output shaft (for example a spindle) via a transmission or directly, which ensures a translational displacement of the locking body by engaging with the thread located on the locking body.
  • both at least one cylinder locking body and at least one telescopic locking body are provided, the respective movement axes of which are not parallel to one another, but are preferably perpendicular to one another.
  • a latch head is the angle between the axes of movement of a cylinder latch body and a telescopic latch body 90° so that the different locking bodies have axes of movement that are perpendicular to each other.
  • At least two cylinder locking bodies are provided, the respective axes of movement of which are parallel to one another, preferably identical to one another.
  • the at least two cylinder latch bodies typically lie on opposite sides of the latch head housing. So if you extend these two cylinder bolt bodies, they move away from each other. The direction of movement of the two cylinder locking bodies is therefore antiparallel, but can lie on a common axis.
  • At least two telescopic locking bodies are provided, the respective movement axes of which are parallel to one another.
  • the at least two telescopic locking bodies lie on a common side of the housing of the locking head and have axes of movement parallel to one another. It is common for the movement of the two
  • Telescopic locking body occurs approximately concurrently, since a type of clamp is typically attached between the two telescopic locking bodies, which encompasses an unlocking mechanism, so that retracting the two telescopic locking bodies releases it, and two mutually adjacent telescopic sections are separated from one another.
  • the invention also relates to a telescoping cylinder with a locking head according to one of the variants discussed above. It can be provided that for actuating the at least one
  • Cylinder bolt body and / or the at least one telescopic bolt body in the Locking head is only to control the electric actuator, and preferably no hydraulic power is required.
  • Fig. 1 a schematic sectional view of a locking body as it is formed in the locking head according to the invention.
  • Fig. 1 does not show the entirety of a locking head, but only an isolated area of a locking body 2 and its arrangement for moving the locking body 2. It is clear to the person skilled in the art that both the cylinder locking body and the telescopic locking body are set in motion in the same way can.
  • the locking body 2 is therefore accommodated in the housing 1 and can either be extended from this or retracted into it.
  • the bolt-like cylinder bolt body 2 is slidably received in the housing 1 .
  • the spring element 4 is designed in such a way that it pushes the cylinder bolt body 2 outwards into an extended position.
  • an electric actuator 3 is provided, which interacts with the cylinder bolt body 2 by rotating a shaft 6, for example a spindle, and moves it inwards into the interior of the housing 1.
  • the cylinder bolt body 2 can have a blind hole directed toward the electric actuator 3, which has a threaded area on its inner circumference has, which meshes with a corresponding area of a driven by the electric actuator 3 shaft.
  • a threaded area can also be provided on the outer circumference of the cylinder bolt body, which interacts with a corresponding spindle of the electric actuator 3 .
  • the reference number 5 designates the lines for controlling and for the power supply of the electric actuator 3, which have much more compact dimensions and a significantly lower weight than is the case with the hydraulic lines conventionally used.
  • a hydraulic drive it is not absolutely necessary to arrange an electric actuator inside the locking head, but the increasing miniaturization of the electrical components and the actuators means that it can be arranged in the locking head, so that the advantage of saving weight by omitting the hydraulic lines outweighs this.
  • the spring element 4 is designed to push the cylinder bolt body 2 outwards, so that the cylinder bolt body 2 remains in its extended position even if the electric actuator 3 fails or has some other defect.

Landscapes

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

Abstract

La présente invention concerne une tête de verrouillage d'un vérin télescopique d'une flèche télescopique, qui présente plusieurs sections télescopiques, et un boîtier (1), au moins un corps verrou de vérin (2) de type verrou qui peut être escamoté et déployé du boîtier pour verrouiller la tête de verrouillage avec une section télescopique, et au moins un corps verrou télescopique (2) qui peut être escamoté et déployé du boîtier pour libérer la section télescopique aux fins de mouvement télescopique. La tête de verrouillage comporte au moins un mécanisme de commande électrique (3) conçu pour actionner l'au moins un corps verrou de vérin et/ou l'au moins un corps verrou télescopique.
EP22751753.9A 2021-07-28 2022-07-21 Tête de verrouillage Active EP4337588B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021119612.4A DE102021119612A1 (de) 2021-07-28 2021-07-28 Verriegelungskopf
PCT/EP2022/070533 WO2023006583A1 (fr) 2021-07-28 2022-07-21 Tête de verrouillage

Publications (2)

Publication Number Publication Date
EP4337588A1 true EP4337588A1 (fr) 2024-03-20
EP4337588B1 EP4337588B1 (fr) 2026-04-01

Family

ID=82846493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22751753.9A Active EP4337588B1 (fr) 2021-07-28 2022-07-21 Tête de verrouillage

Country Status (5)

Country Link
US (1) US12528675B2 (fr)
EP (1) EP4337588B1 (fr)
JP (1) JP7713088B2 (fr)
DE (1) DE102021119612A1 (fr)
WO (1) WO2023006583A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102024137939B3 (de) 2024-12-16 2026-05-07 Aros Hydraulik Gesellschaft mit beschränkter Haftung Verriegelungskopf

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2053149B (en) * 1980-07-25 1983-06-02 Coles Cranes Ltd Telescopic crane booms
JP3527770B2 (ja) * 1994-01-28 2004-05-17 Ｔｈｋ株式会社 テレスコピック伸縮装置のロック・アンロック機構
DE10164600C2 (de) 2001-12-21 2003-12-11 Terex Demag Gmbh & Co Kg Teleskopausleger
DE102009009944B4 (de) * 2009-02-20 2011-02-24 Terex-Demag Gmbh Sicherungs- und Verbolzungseinheit
DE202013010381U1 (de) 2013-11-11 2013-11-26 Terex Cranes Germany Gmbh Antrieb einer Schiebekulisse eines Verriegelungssystems eines Teleskopiersystems eines Kranauslegers
DE202015101045U1 (de) 2014-03-05 2015-04-08 Montanhydraulik Gmbh Verriegelungskopf
DE202014002187U1 (de) 2014-03-13 2014-06-26 Tadano Faun Gmbh Teleskop-Ausleger
JP6787392B2 (ja) * 2016-03-03 2020-11-18 株式会社タダノ 伸縮機構
JP6668832B2 (ja) * 2016-03-07 2020-03-18 株式会社タダノ ブーム伸縮装置
US12227396B2 (en) * 2019-04-04 2025-02-18 Tadano Ltd. Work machine

Also Published As

Publication number Publication date
WO2023006583A1 (fr) 2023-02-02
JP2024527967A (ja) 2024-07-26
DE102021119612A1 (de) 2023-02-02
US20240217786A1 (en) 2024-07-04
JP7713088B2 (ja) 2025-07-24
US12528675B2 (en) 2026-01-20
EP4337588B1 (fr) 2026-04-01

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