EP0661234A1 - Mobile crane with a telescopic jib - Google Patents
Mobile crane with a telescopic jib Download PDFInfo
- Publication number
- EP0661234A1 EP0661234A1 EP94116337A EP94116337A EP0661234A1 EP 0661234 A1 EP0661234 A1 EP 0661234A1 EP 94116337 A EP94116337 A EP 94116337A EP 94116337 A EP94116337 A EP 94116337A EP 0661234 A1 EP0661234 A1 EP 0661234A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- telescopic
- locking
- piston
- cylinder
- cylinder unit
- 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
- 238000010168 coupling process Methods 0.000 claims description 14
- 238000005859 coupling reaction Methods 0.000 claims description 14
- 230000008878 coupling Effects 0.000 claims description 12
- 239000011324 bead Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- 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
-
- 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
Definitions
- the invention relates to a mobile crane with a telescopic boom, the individual, telescopic shots after releasing locking bolts connections with only a single-stage, hydraulic piston-cylinder unit can be extended and retracted and in the respective extended or retracted positions by in the direction spring-loaded locking bolts are bolted to their locked positions, in which the piston rod of the piston-cylinder unit is articulated to the boom coupling piece that closes the inner end of the outer shot, and a driver device that can be coupled with receptacles of the telescopic shots in the area of the Is arranged end of the cylinder from which the piston rod emerges.
- the outer shot and the telescopic shots have spring-loaded locking bolts at their outer ends on opposite sides symmetrically to the luffing plane, which engage in bores of the shots each enclosed by them and by means of pneumatic bolting cylinders against spring force can be moved out of the locking holes and can be locked in the locking holes by ventilation.
- extendable and retractable supply lines must be laid in the individual sections of the telescopic boom in order to To be able to supply bolted cylinders with compressed air.
- the arrangement of supply lines in the telescopic boom is not only complex, but also requires larger gaps between the individual shots or telescopic shots, so that the telescopic shots essentially cannot cover the entire cross-section of the shots surrounding them, but rather are made with correspondingly smaller cross-sections Need to become.
- the object of the invention is therefore to provide a crane of the type specified in the introduction, in which the bolting cylinders of the individual shots with associated supply lines are eliminated.
- this object is achieved in a crane of the generic type in that each of the telescopic shots is provided at its inner end with at least one locking bolt which is locked by a spring in the radial extension direction for locking with one at the inner or outer end of this shot Shot located bore is loaded that the locking bolt is provided at its inner end with a coupling piece which can be coupled in the locking position of the locking bolt with a piston or a piston rod of a hydraulic piston-cylinder unit arranged radially at the outlet end of the piston rod of the cylinder, and that means are provided which move the cylinder into the coupling position in a precise position.
- the individual telescopic shots are only provided at their inner ends with radially movable, spring-loaded locking bolts, all of which can be actuated with a common piston-cylinder unit arranged on the extension and retraction cylinder, so that each cylinder is assigned a bolting cylinder or actuating devices for the locking bolts are omitted.
- Each telescopic shot is expediently provided with only one locking bolt, the associated bores in the top of the profile of the enclosing shots being in their horizontal position.
- the coupling pieces of all locking bolts consist of circular disks which are connected to the locking bolt by means of shafts and are in a common axial plane, that the counter-coupling piece of the radial piston-cylinder unit runs in the axial direction , channel-shaped section with a U-shaped profile, which is provided at the free ends of its legs with inwardly pointing webs, that the webs delimit a gap between them, the width of which corresponds to the diameter of the shaft, and that the legs are spaced apart from one another have, which corresponds to the diameter of the discs.
- the individual locking bolts can be coupled with the piston-cylinder unit that actuates them by moving them into coupling engagement with the coupling bolt, the coupling being able to be effected simply by the channel-shaped section running over the clutch disc .
- the radial piston-cylinder unit for pulling in the locking bolt can only be actuated when the driver device is coupled to the receptacles of the shot that extracts or extracts from the bag. This ensures that the individual telescopic shots are never in an unlocked state.
- the receptacles expediently consist of bores or bushings for retractable locking bolts, the driver device being formed from a block with opposing cylinders for the retractable and retractable bolts formed by their pistons or piston rods.
- the bores consist of elongated holes extending in the axial direction and the locking bolts have circumferential collars or beads at their outer ends. Since the locking bolts are supported on the ends of the elongated holes, they overlap the elongated holes with their collars or beads, so that an additional safeguard against unintentional, automatic loosening of the bolt is created.
- the means positioning the cylinder expediently consist of reflection light barriers attached to the latter, which scan marks attached to the shots.
- the shots expediently consist of profiles, the top of which are formed from U-shaped pieces, the legs of which are welded to the edges of lower, semicircular or semi-oval shells.
- profiles of the individual shots of the telescopic boom are known from EP 0 499 208 A2.
- the telescopic crane according to the invention is characterized by a very simple and safe construction. All limit switches as well as electrical and hydraulic parts are located on the telescopic cylinder. No special energy supply is required to lock the individual telescopic sections. This eliminates all energy supply lines, so-called “energy supply chains", switch boxes and the other associated devices.
- all locking devices are located on the end pieces and can be welded or processed in one device.
- the individual telescopic sections with their cross sections can fill the cross sections of the enclosing sections more completely, so that better load capacities are achieved with a reduced deflection of the boom.
- a single-stage piston-cylinder unit 7 is provided for telescoping and retracting the individual telescopic sections 3 to 6, a single-stage piston-cylinder unit 7 is provided.
- the outer shot 2 is closed at its inner end by the boom link 8.
- This boom link 8 has two forked bearing legs 9, 10 with aligned bearing bores 11, via which the outer section 2 is pivotally mounted in the usual manner on a pivot axis in the superstructure of a crane vehicle.
- the piston rod of the rocker cylinder is also articulated in a manner not shown.
- the piston rod 12 of the single-stage, hydraulic piston-cylinder unit 7 is provided at its inner end with a head piece 13, via which it is articulated on the boom articulation piece 8.
- the cylinder 18 of the piston-cylinder unit 7 is provided at the outlet end of the piston rod 12 with a collar 19 which has cylinder bores on opposite sides in the longitudinal center plane, in which locking bolts 20, 21 are guided as pistons.
- the telescopic sections 3 to 6 carry at their inner ends welded, frame-shaped end pieces 22 to 25, which are provided on opposite sides symmetrically to the luffing plane of the telescopic boom 1 with cup-shaped bushings 26 which form receptacles for the locking bolts 20, 21.
- the center lines of the bores of the receptacles each have the same distances from one another. So far, the telescopic boom corresponds to the telescopic boom according to EP 0 476 225 A2.
- the telescopic sections 3 to 6 have spring-loaded locking bolts at their ends in the middle of their upper walls 30 to 33. These locking bolts are guided longitudinally displaceably in bores in the top walls of the telescopic shots and are loaded in the direction of extension by compression springs 34 which are supported on the one hand on stops 35 forming collars and on the other hand on step-like recesses of covers 36 which close a housing-like cage of the locking bolts. With the collars 35, the locking bolts are supported on the inner edges of the bores in the top walls of the telescopic shots.
- the locking bolts 30 to 33 have shafts 37 at their inner ends, which are provided with circular disks 38 at their inner ends. 3, the disks 38 are located in a common plane.
- the shots 2 to 5 have at their inner and outer ends bores 39, in which the locking bolts 30 to 33 engage for locking. At their free ends passing through the locking bores 39, the locking bolts are provided with circumferential, annular beads 40 which serve to secure against unintentional loosening.
- the outer locking bores 39 are designed as elongated holes extending in the axial direction. In the locked position of the extended shots, the locking bolts are supported on the inner ends of the elongated holes 39, so that the annular beads 40 overlap the lower edge of the locking bore 39 in the manner shown in FIG. 6.
- the telescopic cylinder 18 is in the region of its exit collar of the piston rod 12 perpendicular to the horizontal plane in which the cylinder bores with the locking bolts 20, 21 are provided on its upper side with a further piston-cylinder unit 50, the piston 51 of which is on his upper free end is provided with a groove-shaped recess 52 which extends in the axial direction.
- This trough-shaped recess is U-shaped in cross section, with webs 53 being attached to the upper ends of the legs, which delimit a gap between them through which the shaft 37 of the locking bolts 30 to 33 can pass.
- the respective circular disk 38 is located within the channel-shaped section in the manner shown in FIGS. 4 and 5, so that the locking bolts 30 to 33 are coupled to the piston-cylinder unit 50 and can be moved into their unlocked position by retracting the piston 51 while compressing the compression spring 34.
- a reflection light barrier 56 is provided on the cylinder 18, which scans marks on the inner walls of the telescopic shots .
- FIG. 4 shows a section through two telescopic sections which are locked together in the extended state.
- the profile of the telescopic sections corresponds to the profile shapes described in EP 0 499 208 A2.
- the collar-shaped edge of the telescopic cylinder 18 is moved to the height of the corresponding end piece of the telescopic section and positioned there by the light barrier 56.
- the two side locking bolts 20, 21 are then extended. With built-in proximity limit switches in the side, the bolts 20, 21 extending cylinders ensures that both bolts are fully extended and locked with the holes in the telescopic section. Only after this locking is the piston-cylinder unit 50 activated so that the piston 51 can be retracted and the locking can be released with the next telescopic shot.
- the inner telescopic boom is now extended until it has reached the desired extension length.
- the piston 51 is extended so that the extended telescopic section is locked with the telescopic section encompassing it by engaging the locking bolt in the locking bore.
- Built-in limit switches in the piston-cylinder unit 50 ensure that the respective locking bolt is fully inserted into the locking bore. Only after this locking of the telescopic sections with one another is it possible to pull in the two lateral bolts 20, 21 via the associated cylinders.
- the telescopic cylinder 18 is then moved back to the end piece of the next telescopic shot and locked in the manner described. The next telescopic shot is extended accordingly.
- the retracting of the individual telescopic sections is carried out in reverse.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
Description
Die Erfindung betrifft einen fahrbaren Kran mit einem Teleskopausleger, dessen einzelne, austeleskopierbare Schüsse nach dem Lösen von arretierenden Bolzen Verbindungen mit nur einer einstufigen, hydraulischen Kolben-Zylinder-Einheit aus- und einfahrbar sind und in den jeweils aus- oder eingefahrene Stellungen durch in Richtung auf ihre verriegelten Stellungen federbelastete Verriegelungsbolzen verbolzt sind, bei dem die Kolbenstange der Kolben-Zylinder-Einheit an dem das innere Ende des äußeren Schusses abschließenden Ausleger-Anlenkstück angelenkt ist und eine Mitnehmereinrichtung, die mit Aufnahmen der austeleskopierbaren Schüsse kuppelbar ist, in dem Bereich des Endes des Zylinders angeordnet ist, aus dem die Kolbenstange austritt.The invention relates to a mobile crane with a telescopic boom, the individual, telescopic shots after releasing locking bolts connections with only a single-stage, hydraulic piston-cylinder unit can be extended and retracted and in the respective extended or retracted positions by in the direction spring-loaded locking bolts are bolted to their locked positions, in which the piston rod of the piston-cylinder unit is articulated to the boom coupling piece that closes the inner end of the outer shot, and a driver device that can be coupled with receptacles of the telescopic shots in the area of the Is arranged end of the cylinder from which the piston rod emerges.
Bei einem aus EP 0 476 225 A2 bekannten Kran dieser Art weisen der äußere Schuß sowie die austeleskopierbaren Schüsse an ihren äußeren Enden auf gegenüberliegenden Seiten symmetrisch zur Wippebene federbelastete Verriegelungsbolzen auf, die in Bohrungen der jeweils von diesen eingefaßten Schüssen greifen und durch pneumatische Verbolzungszylinder gegen Federkraft aus den Verriegelungsbohrungen herausbewegbar und durch Entlüftung in den Verriegelungsbohrungen verrastbar sind. Bei dem bekannten Kran müssen in den einzelnen Schüssen des Teleskopauslegers verlängerbare und einziehbare Versorgungsleitungen verlegt werden, um die Verbolzungszylinder mit Druckluft versorgen zu können. Die Anordnung von Versorgungsleitungen in dem Teleskopausleger ist nicht nur aufwendig, sondern diese bedingt auch größere Zwischenräume zwischen den einzelnen Schüssen bzw. Teleskopschüssen, so daß die austeleskopierbaren Schüsse im wesentlichen nicht den gesamten Querschnitt der diese einfassenden Schüsse abdecken können, sondern mit entsprechend kleineren Querschnitten ausgeführt werden müssen.In a crane of this type known from EP 0 476 225 A2, the outer shot and the telescopic shots have spring-loaded locking bolts at their outer ends on opposite sides symmetrically to the luffing plane, which engage in bores of the shots each enclosed by them and by means of pneumatic bolting cylinders against spring force can be moved out of the locking holes and can be locked in the locking holes by ventilation. In the known crane extendable and retractable supply lines must be laid in the individual sections of the telescopic boom in order to To be able to supply bolted cylinders with compressed air. The arrangement of supply lines in the telescopic boom is not only complex, but also requires larger gaps between the individual shots or telescopic shots, so that the telescopic shots essentially cannot cover the entire cross-section of the shots surrounding them, but rather are made with correspondingly smaller cross-sections Need to become.
Aufgabe der Erfindung ist es daher, einen Kran der eingangs angegebenen Art zu schaffen, bei dem die Verbolzungszylinder der einzelnen Schüsse mit zugehörigen Versorgungsleitungen entfallen.The object of the invention is therefore to provide a crane of the type specified in the introduction, in which the bolting cylinders of the individual shots with associated supply lines are eliminated.
Erfindungsgemäß wird diese Aufgabe bei einem Kran der gattungsgemäßen Art dadurch gelöst, daß jeder der austeleskopierbaren Schüsse an seinem inneren Ende mit mindestens einem Verriegelungsbolzen versehen ist, der durch eine Feder in radialer Ausschubrichtung zur Verrastung mit einer am inneren oder am äußeren Ende des diesen Schuß einfassenden Schusses befindlichen Bohrung belastet ist, daß der Verriegelungsbolzen an seinem inneren Ende mit einem Kupplungsstück versehen ist, das in der Verriegelungsstellung des Verriegelungsbolzen mit einem Kolben oder einer Kolbenstange einer radial an dem Austrittsende der Kolbenstange des Zylinders angeordneten hydraulischen Kolben-Zylinder-Einheit kuppelbar ist, und daß Mittel vorgesehen sind, die den Zylinder positionsgenau in die Kupplungsstellung verfahren. Bei dem erfindungsgemäßen Teleskopkran sind die einzelnen austeleskopierbaren Schüsse nur an ihren inneren Enden mit radial beweglichen, federbelasteten Verriegelungsbolzen versehen, die sämtlich mit einer gemeinsamen, an dem Ausschub- und Einzugszylinder angeordneten Kolben-Zylinder-Einheit betätigt werden können, so daß jedem Schuß zugeordnete Verbolzungszylinder oder Betätigungseinrichtungen für die Verriegelungsbolzen entfallen.According to the invention, this object is achieved in a crane of the generic type in that each of the telescopic shots is provided at its inner end with at least one locking bolt which is locked by a spring in the radial extension direction for locking with one at the inner or outer end of this shot Shot located bore is loaded that the locking bolt is provided at its inner end with a coupling piece which can be coupled in the locking position of the locking bolt with a piston or a piston rod of a hydraulic piston-cylinder unit arranged radially at the outlet end of the piston rod of the cylinder, and that means are provided which move the cylinder into the coupling position in a precise position. In the telescopic crane according to the invention, the individual telescopic shots are only provided at their inner ends with radially movable, spring-loaded locking bolts, all of which can be actuated with a common piston-cylinder unit arranged on the extension and retraction cylinder, so that each cylinder is assigned a bolting cylinder or actuating devices for the locking bolts are omitted.
Zweckmäßigerweise ist jeder austeleskopierbare Schuß nur mit einem Verriegelungsbolzen versehen, wobei sich die zugehörigen Bohrungen in der Oberseite des Profils der einfassenden Schüsse in deren horizontaler Stellung befinden.Each telescopic shot is expediently provided with only one locking bolt, the associated bores in the top of the profile of the enclosing shots being in their horizontal position.
In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die Kupplungsstücke sämtlicher Verriegelungsbolzen aus kreisrunden Scheiben bestehen, die über Schäfte mit dem Verriegelungsbolzen verbunden sind und sich in einer gemeinsamen axialen Ebene befinden, daß das Gegenkupplungsstück der radialen Kolben-Zylinder-Einheit ein in axialer Richtung verlaufender, rinnenförmiger Abschnitt mit U-förmigem Profil ist, das an den freien Enden seiner Schenkel mit nach innen weisenden Stegen versehen ist, daß die Stege zwischen sich einen Spalt begrenzen, dessen Breite dem Durchmesser des Schafts entspricht, und daß die Schenkel einen inneren Abstand voneinander aufweisen, der dem Durchmesser der Scheiben entspricht. Die einzelnen Verriegelungsbolzen lassen sich nach dieser Ausgestaltung einfach dadurch mit der diese betätigenden Kolben-Zylinder-Einheit kuppeln, daß diese in den kuppelnden Eingriff mit dem Kupplungsbolzen verfahren wird, wobei sich die Kupplung einfach dadurch bewirken läßt, daß der rinnenförmige Abschnitt über die Kupplungsscheibe fährt.In a further embodiment of the invention it is provided that the coupling pieces of all locking bolts consist of circular disks which are connected to the locking bolt by means of shafts and are in a common axial plane, that the counter-coupling piece of the radial piston-cylinder unit runs in the axial direction , channel-shaped section with a U-shaped profile, which is provided at the free ends of its legs with inwardly pointing webs, that the webs delimit a gap between them, the width of which corresponds to the diameter of the shaft, and that the legs are spaced apart from one another have, which corresponds to the diameter of the discs. According to this embodiment, the individual locking bolts can be coupled with the piston-cylinder unit that actuates them by moving them into coupling engagement with the coupling bolt, the coupling being able to be effected simply by the channel-shaped section running over the clutch disc .
In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß die radiale Kolben-Zylinder-Einheit zum Einziehen des Verriegelungsbolzens nur betätigt werden kann, wenn die Mitnehmereinrichtung mit den Aufnahmen des aus- oder einzuteleskopierenden Schusses gekuppelt ist. Auf diese Weise ist sichergestellt, daß die einzelnen austeleskopierbaren Schüsse sich zu keiner Zeit in einem unverriegelten Zustand befinden.In a further embodiment of the invention it is provided that the radial piston-cylinder unit for pulling in the locking bolt can only be actuated when the driver device is coupled to the receptacles of the shot that extracts or extracts from the bag. This ensures that the individual telescopic shots are never in an unlocked state.
Zweckmäßigerweise bestehen die Aufnahmen aus Bohrungen oder Buchsen für einfahrbare Verriegelungsbolzen, wobei die Mitnehmereinrichtung aus einem Block mit einander gegenüberliegenden Zylindern für die durch deren Kolben oder Kolbenstangen gebildeten ein- und ausfahrbaren Bolzen gebildet ist.The receptacles expediently consist of bores or bushings for retractable locking bolts, the driver device being formed from a block with opposing cylinders for the retractable and retractable bolts formed by their pistons or piston rods.
Nach einer bevorzugten Ausführungsform ist vorgesehen, daß die Bohrungen aus in axialer Richtung verlaufenden Langlöchern bestehen und die Verriegelungsbolzen an ihren äußeren Enden umlaufende Bunde oder Wulste aufweisen. Da die Verriegelungsbolzen sich auf die Enden der Langlöcher abstützen, übergreifen sie die Langlöcher mit ihren Bunden oder Wulsten, so daß eine zusätzliche Sicherung gegen ein unbeabsichtigtes, selbsttätiges Lösen des Bolzens geschaffen ist.According to a preferred embodiment it is provided that the bores consist of elongated holes extending in the axial direction and the locking bolts have circumferential collars or beads at their outer ends. Since the locking bolts are supported on the ends of the elongated holes, they overlap the elongated holes with their collars or beads, so that an additional safeguard against unintentional, automatic loosening of the bolt is created.
Die den Zylinder positionierenden Mittel bestehen zweckmäßigerweise aus an diesem angebrachten Reflexionslichtschranken, die an den Schüssen angebrachte Marken abtasten.The means positioning the cylinder expediently consist of reflection light barriers attached to the latter, which scan marks attached to the shots.
Zweckmäßigerweise bestehen die Schüsse aus Profilen, deren Oberseite aus U-förmigen Stücken gebildet sind, deren Schenkel mit den Rändern unterer, halbrunder oder halbovaler Schalen verschweißt sind. Derartige Profile der einzelnen Schüsse des Teleskopauslegers sind aus EP 0 499 208 A2 bekannt.The shots expediently consist of profiles, the top of which are formed from U-shaped pieces, the legs of which are welded to the edges of lower, semicircular or semi-oval shells. Such profiles of the individual shots of the telescopic boom are known from EP 0 499 208 A2.
Der erfindungsgemäße Teleskopkran zeichnet sich durch eine sehr einfache und sichere Bauweise aus. Sämtliche Endschalter sowie elektrischen und hydraulischen Teile befinden sich auf dem Teleskopierzylinder. Zur Verriegelung der einzelnen Teleskopschüsse ist keine besondere Energieversorgung notwendig. Damit entfallen sämtliche Energiezuführungsleitungen, sogenannte "Energiezuführungsketten", Schaltkästen und die sonstigen zugehörigen Einrichtungen.The telescopic crane according to the invention is characterized by a very simple and safe construction. All limit switches as well as electrical and hydraulic parts are located on the telescopic cylinder. No special energy supply is required to lock the individual telescopic sections. This eliminates all energy supply lines, so-called "energy supply chains", switch boxes and the other associated devices.
Dadurch, daß die Verriegelungen an den inneren Enden der Teleskopschüsse erfolgen, befinden sich sämtliche Verriegelungseinrichtungen an den Endstücken und können in einer Vorrichtung eingeschweißt bzw. bearbeitet werden.Due to the fact that the locking takes place at the inner ends of the telescopic sections, all locking devices are located on the end pieces and can be welded or processed in one device.
Da Energiezuführungsleitungen, wie beispielsweise Kabelraupen, entfallen, können die einzelnen Teleskopschüsse mit ihren Querschnitten die Querschnitte der diese einfassenden Schüsse vollständiger ausfüllen, so daß bessere Traglastwerte bei einer verringerten Durchbiegung des Auslegers erreicht werden.Since energy supply lines, such as cable caterpillars, are omitted, the individual telescopic sections with their cross sections can fill the cross sections of the enclosing sections more completely, so that better load capacities are achieved with a reduced deflection of the boom.
Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnung näher erläutert. In dieser zeigen
- Fig. 1
- einen Längsschnitt durch einen Teleskopausleger mit vier austeleskopierbaren Schüssen im eingefahrenen Zustand,
- Fig. 2
- einen Horizontalschnitt durch den Teleskopausleger nach Fig. 1,
- Fig. 3
- den linken Teil des Teleskopauslegers nach Fig. 1 in vergrößerter Darstellung,
- Fig. 4
- einen Querschnitt durch den Teleskopausleger,
- Fig. 5
- eine Seitenansicht der Kupplungseinrichtung und
- Fig. 6
- eine Draufsicht auf eine Verriegelungsbohrung.
- Fig. 1
- a longitudinal section through a telescopic boom with four telescopic shots when retracted,
- Fig. 2
- 2 shows a horizontal section through the telescopic boom according to FIG. 1,
- Fig. 3
- the left part of the telescopic boom according to FIG. 1 in an enlarged view,
- Fig. 4
- a cross section through the telescopic boom,
- Fig. 5
- a side view of the coupling device and
- Fig. 6
- a top view of a locking hole.
Aus den Figuren 1 bis 3 ist ein Teleskopausleger 1 mit einem äußeren Schuß 2 ersichtlich, aus dem ineinandergeschobene Teleskopschüsse 3, 4, 5 und 6 austeleskopierbar sind. Zum Austeleskopieren und Einfahren der einzelnen Teleskopschüsse 3 bis 6 ist eine einstufige Kolben-Zylinder-Einheit 7 vorgesehen.1 to 3 show a telescopic boom 1 with an
Der äußere Schuß 2 ist an seinem inneren Ende durch das Ausleger-Anlenkstück 8 geschlossen. Dieses Ausleger-Anlenkstück 8 weist zwei gegabelte Lagerschenkel 9, 10 mit fluchtenden Lagerbohrungen 11 auf, über die der äußere Schuß 2 in üblicher Weise auf einer Schwenkachse im Oberwagen eines Kranfahrzeugs schwenkbar gelagert ist. An dem äußeren Schuß 2 ist darüber hinaus noch in nicht dargestellter Weise die Kolbenstange des Wippzylinders angelenkt.The
Die Kolbenstange 12 der einstufigen, hydraulischen Kolben-Zylinder-Einheit 7 ist an ihrem inneren Ende mit einem Kopfstück 13 versehen, über das sie gelenkig an dem Ausleger-Anlenkstück 8 gelagert ist.The
Der Zylinder 18 der Kolben-Zylinder-Einheit 7 ist an dem Austrittsende der Kolbenstange 12 mit einem Kragen 19 versehen, der auf gegenüberliegenden Seiten in der Längsmittelebene Zylinderbohrungen aufweist, in denen als Kolben Verriegelungsbolzen 20, 21 geführt sind. Die Teleskopschüsse 3 bis 6 tragen an ihren inneren Enden angeschweißte, rahmenförmige Endstücke 22 bis 25, die auf gegenüberliegenden Seiten symmetrisch zur Wippebene des Teleskopauslegers 1 mit topfförmigen Buchsen 26 versehen sind, die Aufnahmen für die Verriegelungsbolzen 20, 21 bilden. In dem aus den Figuren 1 bis 3 eingefahrenen Zustand der Teleskope 3 bis 6 weisen die Mittellinien der Bohrungen der Aufnahmen jeweils gleiche Abstände voneinander auf. Soweit entspricht der Teleskopausleger dem Teleskopausleger nach EP 0 476 225 A2.The
Mittig in ihren oberen Wandungen weisen die austeleskopierbaren Schüsse 3 bis 6 an ihren Enden federbelastete Verriegelungsbolzen 30 bis 33 auf. Diese Verriegelungsbolzen sind in Bohrungen der Deckwandungen der austeleskopierbaren Schüsse längsverschieblich geführt und durch Druckfedern 34 in Ausschubrichtung belastet, die sich einerseits auf Anschläge 35 bildenden Bunden und andererseits auf stufenartigen Ausnehmungen von Deckeln 36 abstützen, die einen gehäuseartigen Käfig der Verriegelungsbolzen schließen. Mit den Bunden 35 stützen sich die Verriegelungsbolzen auf die inneren Ränder der Bohrungen in den Deckwandungen der austeleskopierbaren Schüsse ab. Die Verriegelungsbolzen 30 bis 33 tragen an ihren inneren Enden mittig Schäfte 37, die an ihren inneren Enden mit kreisrunden Scheiben 38 versehen sind. Die Scheiben 38 befinden sich, wie aus Fig. 3 ersichtlich ist, in einer gemeinsamen Ebene.The
Die Schüsse 2 bis 5 weisen an ihren inneren und äußeren Enden Bohrungen 39 auf, in die die Verriegelungsbolzen 30 bis 33 zur Verriegelung eingreifen. Die Verriegelungsbolzen sind an ihren die Verriegelungsbohrungen 39 durchsetzenden, freien Enden mit umlaufenden, ringförmigen Wulsten 40 versehen, die derSicherung gegen ein unbeabsichtigtes Lösen dienen. Die äußeren Verriegelungsbohrungen 39 sind, wie aus Fig. 6 ersichtlich ist, als in axialer Richtung verlaufende Langlöcher ausgebildet. Die Verriegelungsbolzen stützen sich in der verriegelten Stellung der ausgefahrenen Schüsse auf den inneren Enden der Langlöcher 39 ab, so daß die ringförmigen Wulste 40 in der aus Fig. 6 ersichtlichen Weise den unteren Rand der Verriegelungsbohrung 39 übergreifen.The
Der Teleskopierzylinder 18 ist im Bereich seines Austrittskragens der Kolbenstange 12 rechtwinkelig zu der horizontalen Ebene, in der sich die Zylinderbohrungen mit den Verriegelungsbolzen 20, 21 befinden, auf seiner Oberseite mit einer weiteren Kolben-Zylinder-Einheit 50 versehen, deren Kolben 51 an seinem oberen freien Ende mit einer rinnenförmigen Ausnehmung 52 versehen ist, die in axialer Richtung verläuft. Diese rinnenförmige Ausnehmung ist im Querschnitt U-förmig, wobei an den oberen Enden der Schenkel Stege 53 angesetzt sind, die zwischen sich einen Spalt begrenzen, durch den der Schaft 37 der Verriegelungsbolzen 30 bis 33 hindurchtreten kann. Wird der Kragen des Zylinders 18 mit der Kolben-Zylinder-Einheit 50 zu den einzelnen Verriegelungsbolzen 30 bis 33 verfahren, befindet sich die jeweilige kreisrunde Scheibe 38 in der aus den Figuren 4 und 5 ersichtlichen Weise innerhalb des rinnenförmigen Abschnitts, so daß die Verriegelungsbolzen 30 bis 33 mit der Kolben-Zylinder-Einheit 50 gekuppelt sind und durch Einfahren des Kolbens 51 unter Zusammendrücken der Druckfeder 34 in ihre entrastete Stellung verfahren werden können.The
Um den mit der Kolben-Zylinder-Einheit 50 versehenen Kragen des Teleskopierzylinders 18 positionsgenau in Eingriff mit den Kupplungsstücken 38 der Verriegelungsbolzen 30 bis 33 verfahren zu können, ist an dem Zylinder 18 eine Reflexionslichtschranke 56 vorgesehen, die Marken an den Innenwandungen der austeleskopierbaren Schüsse abtastet.In order to be able to move the collar of the
Aus Fig. 4 ist ein Schnitt durch zwei im ausgefahrenen Zustand miteinander verriegelte Teleskopschüsse ersichtlich. Das Profil der Teleskopschüsse entspricht den in der EP 0 499 208 A2 beschriebenen Profilformen.4 shows a section through two telescopic sections which are locked together in the extended state. The profile of the telescopic sections corresponds to the profile shapes described in EP 0 499 208 A2.
Zum Aus- und Einfahren der einzelnen Teleskopschüsse wird der kragenförmige Rand des Teleskopierzylinders 18 auf die Höhe des entsprechenden Endstückes des Teleskopschusses gefahren und dort durch die Lichtschranke 56 positioniert. Daraufhin werden die beiden seitlichen Verriegelungsbolzen 20, 21 ausgefahren. Durch eingebaute Näherungsendschalter in den seitlichen, die Bolzen 20, 21 ausfahrenden Zylindern wird sichergestellt, daß beide Bolzen vollständig ausgefahren und mit den Bohrungen des Teleskopschusses verriegelt sind. Erst nach dieser Verriegelung wird die Kolben-Zylinder-Einheit 50 aktiviert, so daß der Kolben 51 eingefahren und die Verriegelung mit dem nächsten Teleskopschuß gelöst werden kann. Der innere Teleskopausleger wird nun ausgefahren, bis er die gewünschte Ausfahrlänge erreicht hat. In dieser Stellung wird der Kolben 51 ausgefahren, so daß der ausgefahrene Teleskopschuß mit dem diesen einfassenden Teleskopschuß durch Eingreifen des Verriegelungsbolzens in die Verriegelungsbohrung verriegelt wird. Durch eingebaute Endschalter in der Kolben-Zylinder-Einheit 50 ist sichergestellt, daß der jeweilige Verriegelungsbolzen vollständig in die Verriegelungsbohrung eingeschoben ist. Erst nach dieser Verriegelung der Teleskopschüsse miteinander ist es möglich, die beiden seitlichen Bolzen 20, 21 über die zugehörigen Zylinder einzuziehen. Daraufhin wird der Teleskopierzylinder 18 zurückgefahren bis zum Endstück des nächsten Teleskopschusses und in der beschriebenen Weise mit diesem verriegelt. Das Ausfahren des nächsten Teleskopschusses erfolgt entsprechend. Das Einfahren der einzelnen Teleskopschüsse erfolgt entsprechend umgekehrt.To extend and retract the individual telescopic sections, the collar-shaped edge of the
Claims (8)
bei dem die Kolbenstange der Kolbenzylindereinheit an dem das innere Ende des äußeren Schusses abschließenden Auslegeanlenkstück angelenkt ist und
eine Mitnehmereinrichtung, die mit Aufnahmen der austeleskopierbaren Schüsse kuppelbar ist, in dem Bereich des Endes des Zylinders angeordnet ist, aus dem die Kolbenstange austritt,
dadurch gekennzeichnet,
daß jeder der austeleskopierbaren Schüsse an seinem inneren Ende mit mindestens einem Verriegelungsbolzen 30 bis 33 versehen ist, der durch eine Feder in radialer Ausschubrichtung zur Verrastung mit einer am inneren Ende oder im Bereich des äußeren Endes des diesen Schuß einfassenden Schusses befindlichen Bohrung beaufschlagt ist,
daß der Verriegelungsbolzen an seinem inneren Ende mit einem Kupplungsstück versehen ist, das in der Verriegelungsstellung des Verriegelungsbolzens mit einem Kolben oder einer Kolbenstange einer radial an dem Austrittsende der Kolbenstange des Zylinders angeordneten hydraulischen Kolbenzylindereinheit kuppelbar ist, und
daß Mittel vorgesehen sind, die den Zylinder positionsgenau in die Kupplungsstellung verfahren.Mobile crane with a telescopic boom, the individual telescopic sections of which can be extended and retracted with only a single-stage hydraulic piston-cylinder unit after releasing locking bolt connections, and are bolted in the extended or retracted positions by spring-loaded locking bolts in the direction of their locked positions,
in which the piston rod of the piston-cylinder unit is articulated on the extension link piece which closes off the inner end of the outer shot and
a driver device, which can be coupled with receptacles of the telescopic shots, is arranged in the region of the end of the cylinder from which the piston rod emerges,
characterized by
that each of the telescopic shots is provided at its inner end with at least one locking bolt 30 to 33, which is acted upon by a spring in the radial extension direction for locking with a bore located at the inner end or in the region of the outer end of the shot enclosing this shot,
that the locking bolt is provided at its inner end with a coupling piece which, in the locking position of the locking bolt, can be coupled to a piston or a piston rod of a hydraulic piston-cylinder unit arranged radially at the outlet end of the piston rod of the cylinder, and
that means are provided which move the cylinder into the coupling position in a precise position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9422159U DE9422159U1 (en) | 1993-12-28 | 1994-10-17 | Mobile crane with a telescopic boom |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4344795A DE4344795A1 (en) | 1993-12-28 | 1993-12-28 | Mobile crane with a telescopic boom |
| DE4344795 | 1993-12-28 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0661234A1 true EP0661234A1 (en) | 1995-07-05 |
| EP0661234B1 EP0661234B1 (en) | 1999-12-29 |
| EP0661234B2 EP0661234B2 (en) | 2004-03-03 |
Family
ID=6506438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94116337A Expired - Lifetime EP0661234B2 (en) | 1993-12-28 | 1994-10-17 | Mobile crane with a telescopic jib |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5628416A (en) |
| EP (1) | EP0661234B2 (en) |
| JP (1) | JP3212467B2 (en) |
| DE (2) | DE4344795A1 (en) |
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- 1993-12-28 DE DE4344795A patent/DE4344795A1/en not_active Withdrawn
-
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- 1994-10-17 EP EP94116337A patent/EP0661234B2/en not_active Expired - Lifetime
- 1994-10-17 DE DE59409037T patent/DE59409037D1/en not_active Expired - Lifetime
- 1994-12-28 JP JP32682094A patent/JP3212467B2/en not_active Expired - Lifetime
- 1994-12-28 US US08/365,469 patent/US5628416A/en not_active Expired - Lifetime
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0990617A1 (en) * | 1995-07-17 | 2000-04-05 | Montanhydraulik GmbH | Telescoping system |
| EP0754646A1 (en) * | 1995-07-17 | 1997-01-22 | Montanhydraulik GmbH | Telescoping system |
| DE19653502A1 (en) * | 1996-12-20 | 1998-06-25 | Kidde Ind Inc | Device and method for locking or releasing the locking of shots of a telescopic boom for a mobile crane |
| US6062404A (en) * | 1996-12-20 | 2000-05-16 | Grove U.S. L.L.C. | Device and method for arresting sections of a telescopic jib |
| DE19653502C2 (en) * | 1996-12-20 | 2000-06-21 | Grove Us Llc | Device for locking or releasing the locking of shots of a telescopic boom for a mobile crane |
| DE19824671C2 (en) * | 1997-05-28 | 2002-09-19 | Mannesmann Ag | Crane with a telescopic boom |
| WO1998054081A1 (en) * | 1997-05-28 | 1998-12-03 | Mannesmann Ag | Crane with telescope jib |
| DE19811813B4 (en) * | 1998-03-18 | 2005-11-24 | Grove U.S. LLC (n.d.Ges.d.Staates Delaware) | Lateral boom interlock |
| DE10004838B4 (en) * | 1999-02-10 | 2006-05-04 | Terex-Demag Gmbh & Co. Kg | Crane with a telescopic boom |
| EP1055635A2 (en) * | 1999-04-29 | 2000-11-29 | MANNESMANN Aktiengesellschaft | Crane with a telescopic boom |
| EP1055635A3 (en) * | 1999-04-29 | 2003-09-17 | MANNESMANN Aktiengesellschaft | Crane with a telescopic boom |
| US6206213B1 (en) | 1999-04-29 | 2001-03-27 | Mannesmann Ag | Crane with a luffing jib |
| DE10007773B4 (en) * | 1999-04-29 | 2005-07-21 | Terex-Demag Gmbh & Co. Kg | Crane with a telescopic boom |
| DE19925188C2 (en) * | 1999-05-26 | 2003-03-13 | Demag Mobile Cranes Gmbh & Co | Process for the synchronous telescoping of telescopic sections of a crane boom |
| US6527131B1 (en) | 1999-07-30 | 2003-03-04 | Liebherr-Werk Ehingen Gmbh | Crane with a telescopic boom |
| JP2001080883A (en) * | 1999-07-30 | 2001-03-27 | Liebherr Werk Ehingen Gmbh | Crane |
| EP1072554A1 (en) * | 1999-07-30 | 2001-01-31 | Liebherr-Werk Ehingen GmbH | Crane with telescopic boom |
| DE10048224B4 (en) * | 2000-09-21 | 2005-06-02 | Terex-Demag Gmbh & Co. Kg | Locking unit for a telescopic boom of a crane |
| DE10056649C1 (en) * | 2000-11-09 | 2002-06-13 | Demag Mobile Cranes Gmbh & Co | Telescopic boom with base box and telescopic sections has bolt with axial recess for control piston |
| EP2221270A3 (en) * | 2009-02-20 | 2012-03-21 | Terex Demag GmbH | Securing and bolting unit |
| CN103407912A (en) * | 2013-08-27 | 2013-11-27 | 徐州重型机械有限公司 | Single-cylinder plug pin type telescopic arm, crane and telescoping method of single-cylinder plug pin type telescopic arm |
| CN103407912B (en) * | 2013-08-27 | 2015-06-17 | 徐州重型机械有限公司 | Single-cylinder plug pin type telescopic arm, crane and telescoping method of single-cylinder plug pin type telescopic arm |
| US10077173B2 (en) | 2013-08-27 | 2018-09-18 | Xuzhou Heavy Machinery Co., Ltd. | Single-cylinder plug pin type telescopic arm, telescopic method thereof and crane having telescopic arm |
| CN111379759A (en) * | 2018-12-28 | 2020-07-07 | 徐州徐工液压件有限公司 | Hydraulic oil cylinder assembly and crane |
| CN112777498A (en) * | 2021-03-23 | 2021-05-11 | 三一汽车起重机械有限公司 | Telescopic boom structure and crane |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59409037D1 (en) | 2000-02-03 |
| JPH07267584A (en) | 1995-10-17 |
| EP0661234B2 (en) | 2004-03-03 |
| US5628416A (en) | 1997-05-13 |
| DE4344795A1 (en) | 1995-06-29 |
| EP0661234B1 (en) | 1999-12-29 |
| JP3212467B2 (en) | 2001-09-25 |
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