EP0581270B1 - Teleskopanordnung aus mehreren Tauchkolbenzylindern, insbesondere für Teleskopausleger bei Kranen oder dergleichen - Google Patents

Teleskopanordnung aus mehreren Tauchkolbenzylindern, insbesondere für Teleskopausleger bei Kranen oder dergleichen Download PDF

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Publication number
EP0581270B1
EP0581270B1 EP93112071A EP93112071A EP0581270B1 EP 0581270 B1 EP0581270 B1 EP 0581270B1 EP 93112071 A EP93112071 A EP 93112071A EP 93112071 A EP93112071 A EP 93112071A EP 0581270 B1 EP0581270 B1 EP 0581270B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
plunger
check valve
piston
trunk piston
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.)
Expired - Lifetime
Application number
EP93112071A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0581270A3 (enrdf_load_stackoverflow
EP0581270A2 (de
Inventor
Ernst Kaspar
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.)
Compact Truck AG
Original Assignee
Compact Truck AG
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 Compact Truck AG filed Critical Compact Truck AG
Publication of EP0581270A2 publication Critical patent/EP0581270A2/de
Publication of EP0581270A3 publication Critical patent/EP0581270A3/xx
Application granted granted Critical
Publication of EP0581270B1 publication Critical patent/EP0581270B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1476—Special return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Definitions

  • the invention relates to a telescopic arrangement of several Plunger cylinders, especially for telescopic booms in cranes or the like, in which the plunger cylinder arranged longitudinally displaceable to each other and in the manner a piston-cylinder arrangement by pressurization extendable into one another with a hydraulic medium are, e.g. is known from DE-A-2900015.
  • Telescopic arrangements are not guaranteed to be that one plunger cylinder after the other completely out and is retracted accordingly. Because of different states of friction between the individual Plunger cylinders can skip or Partial extension of the individual plunger cylinders come.
  • the invention has for its object a Telescope arrangement of the type mentioned above train that starting from the largest in cross section Plunger cylinder always in an orderly order Cross section of the next smaller plunger cylinder initially fully extended and accordingly at Retract the reverse order becomes.
  • each of the longitudinally displaceable plunger cylinder on its in Extending direction rear end by a Piston plate is closed, with one in the piston plate extending between its axially two sides, by a check valve closable overflow channel for the Hydraulic medium and in the area of the piston crown Actuator for the check valve is provided, the check valve when fully extended Plunger cylinder opens and that in the cylinder space each the longitudinally displaceable plunger cylinder through the Piston base of the next one arranged in the cylinder space Plunger cylinder axially against the force of a spring Piston base adjustable locking ring provided is at least one radially adjustable Locking element actuates that at the piston crown away position of the locking ring Movability of this plunger cylinder compared to locks him around the plunger cylinder.
  • each of the longitudinally displaceable Plunger cylinder on its rear in the extension direction Front is closed by a piston crown, whereby in the piston crown between himself axially Laterally extending, closable by a check valve and with the return flow from the cylinder space through the Check valve provided with a piston crown Overflow channel for the hydraulic medium and in the area of the Piston bottom an actuator for the check valve is provided that the check valve at complete extended plunger cylinder opens, and the Check valve is opened by an actuator that by Piston plate protrudes into the cylinder chamber and from the piston crown of the arranged therein Plunger cylinder is operated, and that in the im Cross section of smallest plunger cylinder one lockable return line for the hydraulic medium flows.
  • the advantage achieved by the invention is essential in that a supply of the hydraulic medium always only in that cylinder space of the Plunger cylinder is possible, which is already in its fully extended position. At all subsequent plunger cylinders are Check valve closed, so that it does not initially can be extended. Because the check valve only then opens when the plunger cylinder is in its fully extended position ensures that a skip or partial extension the plunger cylinder is not possible.
  • each plunger cylinder once it is complete is extended and the shut-off valve for filling the subsequent cylinder space is open in the extended position mechanically locked so that also a later sliding back is excluded.
  • This Locking ensures in particular that the retraction the plunger cylinder is in exactly the opposite Order in relation to the extension process takes place, that is the smallest plunger cylinder in cross-section first is retracted, although the hydraulic medium all Must flow through the plunger cylinder and only at the in Cross-section of the largest plunger cylinder, the - without the lock - otherwise first under certain circumstances would drive in.
  • the mutual Locking the plunger cylinder against the fact that a backflow of the hydraulic medium through the Check valve is prevented.
  • the in the Cross section of smallest plunger cylinder opening Return line opened, which initially the Cylinder space of the enclosing Plunger cylinder is emptied. Once this Cylinder space is empty, the actuator will Stop valve of the next plunger cylinder opened, see above that a gradual emptying of the individual Plunger cylinder takes place.
  • Check valve and a check valve is provided for retracting the Plunger cylinder with its own overflow channel Check valve and a check valve is provided.
  • Actuator for the check valve from an adjusting ring formed in an annular groove in the lateral surface of the Plunger cylinder arranged and axially against the force a spring towards the end face of the piston crown is adjustable the collar from a radial to inside protruding ring shoulder is actuated on free open end of the piston crown surrounding Plunger cylinder is provided.
  • the collar on its the shoulder of the ring facing side has a collar, the radial outer lateral surface on the inner wall of the enclosing Plunger cylinder is guided and its end face forms a stop for the ring shoulder.
  • the Closing body of the valve can expediently with a plunger projecting axially against the collar be provided.
  • the locking ring on his Provide peripheral surface with an annular groove, the Groove wall facing the piston crown is a run-up slope for that Locking member forms.
  • the locking member of a ball be formed in a hole in the wall of the Plunger cylinder is arranged.
  • the plunger cylinder advantageously a recess or an annular groove for provided the entry of the locking member.
  • the force required to retract the boom can from the payload hanging on the boom.
  • a return cable is connected to the plunger cylinder is windable on a hoist winch.
  • the hoist winch can be driven by a hydraulic motor, the Drive speed depending on the quantity and pressure hydraulic medium flowing out of the plunger cylinders is controlled via a lowering brake valve. This can first for driving this engine that for operation of the boom already existing hydraulic system can be used.
  • the Hydraulic motor in its operation to the Operating conditions.
  • the telescope arrangement can be described in the above Way in certain applications without additional mechanical components are used.
  • it is intended to be used in one also telescopic boom of a crane is arranged, each with a plunger cylinder the boom element assigned to it is connected. On this way the bending forces from the boom added while the telescope assembly essentially absorbs forces only in the axial direction.
  • the telescopic arrangement shown in the drawing consists of several plunger cylinders 1,2,3 and is especially for the operation of telescopic booms Cranes or the like. Provided. In detail they are Plunger cylinder 1, 2, 3, of which in FIGS. 2 and 3 the drawing is only the one connected to the crane and thus fixed plunger cylinder 1 and two further plunger cylinders 2, 3 are shown, arranged longitudinally displaceable to each other.
  • the plunger cylinders 1, 2, 3 and others are of the type a piston-cylinder arrangement by pressurization extendable into one another with a hydraulic medium.
  • the hydraulic medium is supplied only schematically indicated opening 4 in the fixed plunger cylinder 1.
  • Each of the longitudinally displaceable plunger cylinders with The exception to the innermost plunger cylinder is on it in the direction of extension at the rear end by a Piston plate 5 closed.
  • the piston crown 5 In the piston crown 5 is a extending between its axially two sides Overflow channel 6 provided for the hydraulic medium, the can be closed by a check valve 7.
  • This Check valve 7 is usually in his closed position and is only complete when extended plunger cylinder 2, 3 opened.
  • a locking ring 8 provided by the piston crown 5 of the im Next plunger cylinder 3 axially against the force of a spring 9 towards the piston crown 5 is adjustable.
  • the locking ring 8 actuates or several locking members 10, which the displaceability this plunger cylinder 3 against him enclosing plunger cylinder 2 locks when the Locking ring 8 in its piston crown 5 away position.
  • Acting actuator 26 is provided, which from the piston crown 5th protrudes into the cylinder chamber and from which Piston plate 5 of the plunger cylinder arranged therein is operated.
  • the actuator for the check valve 7 is one Set collar 11 formed in an annular groove 12 in the Shell surface of the plunger cylinder 2, 3 arranged and axially against the force of a spring 13 to the outside End face of the piston crown 5 is adjustable.
  • the Collar 11 is of a radially inwardly projecting Ring shoulder 14 actuated at the free open end of the the plunger cylinder 1, 2 enclosing the piston crown 5 is provided.
  • the collar 11 has on its Ring shoulder 14 side facing a collar 15, whose radially outer lateral surface on the inner wall of the enclosing plunger cylinder 1, 2 is guided.
  • the End face of the collar 15 forms a stop for the ring shoulder 14.
  • the closing body 7.1 of the check valve 7 is in the Embodiment spherical and located in a valve chamber in which the closing body 7.1 by a spring 7.2 in the valve closing Position is held.
  • the closing body 7.1 is his Actuation with an axially against the adjusting ring 11 protruding plunger 16 provided by the Closing body 7.1 is lifted off the valve seat, as soon as the collar 15 of the collar 11 on the Ring shoulder 14 abuts.
  • the locking ring 8 in the embodiment according to FIG. 2 has an annular groove 17 on its peripheral surface provided, the groove wall 18 facing the piston head a Starting slope for the locking member 10 forms.
  • the Locking member 10 is particularly simple Design designed as a ball in a hole is arranged in the wall of the plunger cylinder 2, 3. At the free, open end of the plunger cylinder 1, 2, 3 is a recess 19 or an annular groove provided that the entry of the locking member 10th enables a mutual mechanical locking of the two adjacent plunger cylinders 1, 2, 3 is achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Jib Cranes (AREA)
EP93112071A 1992-07-29 1993-07-28 Teleskopanordnung aus mehreren Tauchkolbenzylindern, insbesondere für Teleskopausleger bei Kranen oder dergleichen Expired - Lifetime EP0581270B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4225032 1992-07-29
DE4225032A DE4225032A1 (de) 1992-07-29 1992-07-29 Teleskopanordnung aus mehreren Tauchkolbenzylindern, insbesondere für Teleskopausleger bei Kranen o. dgl.

Publications (3)

Publication Number Publication Date
EP0581270A2 EP0581270A2 (de) 1994-02-02
EP0581270A3 EP0581270A3 (enrdf_load_stackoverflow) 1994-08-31
EP0581270B1 true EP0581270B1 (de) 1998-05-20

Family

ID=6464369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112071A Expired - Lifetime EP0581270B1 (de) 1992-07-29 1993-07-28 Teleskopanordnung aus mehreren Tauchkolbenzylindern, insbesondere für Teleskopausleger bei Kranen oder dergleichen

Country Status (3)

Country Link
EP (1) EP0581270B1 (enrdf_load_stackoverflow)
AT (1) ATE166434T1 (enrdf_load_stackoverflow)
DE (2) DE4225032A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19525627A1 (de) * 1995-07-17 1997-01-23 Montan Hydraulik Gmbh & Co Kg Teleskopiersystem
DE29720972U1 (de) * 1997-11-26 1999-03-25 Ec Engineering + Consulting Spezialmaschinen Gmbh, 89079 Ulm Teleskopierbarer Ausleger
EP1473466B1 (en) * 2003-05-01 2007-01-24 Logitrans A/S Telescopic cylinder
AT512871B1 (de) * 2012-05-07 2014-08-15 Palfinger Systems Gmbh Teleskoparm
CN115507710B (zh) * 2022-09-27 2023-09-05 北京星河动力装备科技有限公司 火箭着陆伸缩臂及火箭回收装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1240743B (de) * 1965-02-17 1967-05-18 Toussaint & Hess Gmbh Hydraulischer Kolbenantrieb mit Teleskopkolben
DE2900015A1 (de) * 1979-01-02 1980-07-10 Benteler Werke Ag Gleichgang-teleskop-zylinder
DE3021633A1 (de) * 1980-06-09 1981-12-17 Schütt, Friedrich, 4755 Holzwickede Mehrstufiger hydraulischer teleskopzylinder
IT1211191B (it) * 1987-07-10 1989-10-12 Op Pagliero S P A Perfezionamento relativo ai martinetti idraulici pluristadi coassiali azionabili telescopicamente in contemporaneita
DE3835945C1 (en) * 1988-10-21 1990-02-01 Nlw Foerdertechnik Gmbh, 4232 Xanten, De Telescopic cylinder

Also Published As

Publication number Publication date
DE4225032A1 (de) 1994-02-03
EP0581270A3 (enrdf_load_stackoverflow) 1994-08-31
EP0581270A2 (de) 1994-02-02
ATE166434T1 (de) 1998-06-15
DE59308566D1 (de) 1998-06-25

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